Most electric hoist brake the defects

  As a small  Wire rope hoist  lifting increasingly widely used in the field of  Hoist equipment  an irreplaceable role .
      For the current domestic lifting industry's rapid development, the production of electric hoist enterprises are emerging, making difficult to safeguard the quality of electric hoist, electric hoist brake according to the most current defects as follows summarize, I hope when you buy electric hoist helpful:
1, different manufacturers of the same model putter loose hydraulic brake and the motor connected to the screw pitch different, it is difficult interchangeable, impact-site repair schedule. To this end, we recommend that the manufacturers strict implementation of national stereotypes  rope hoist  series of product size standards to ensure that the same type of brake hydraulic putter interchangeability.
      2, electric hoist motor shaft and impeller shaft coupling disengaged, causing the motor idling, putting no action. Mainly due to coupling two shafts square coupling off. This coupling ends respectively connected to the motor shaft and the impeller shaft, the coupling end of the motor shaft of the fastening bolt loosening, after loosening the coupling square off on the motor shaft, causing the motor idling.
3, electric hoist brake hinge point for each activity lubricating oil difficult. Press the maintenance procedures hinge point because with thin oil lubrication, the brake structural limitations, oiling hinge point both difficult and hard to keep oil. Each refueling gun oil to the hinge point is within the gap slowly injection, little attention will drip onto the brake wheel or brake belt. If fully taken into account when designing site maintenance conditions, will give the site more convenient to use.

Different places using different types of lifting tackle

      Hoist and trolley  mainly used in factories, mines, agriculture, electricity, construction and other production and construction, piers, docks, warehouses and cargo lifting machinery installation work. The following block types to introduce you to hope for the procurement tackle help.
      There are wooden pulley, short axis, ropes, pulleys and the main core component composition.  hoist and trolley  tonnage according to the bearing can be divided into Hook lift slip hanger hoists, chain link hoists, hangers hoists. According to the number of rounds can be divided into single-door pulley, pulley and multi-door two-door pulley. By pulley and hanging objects can be divided into hook type pulley, chain pulley, rings and hanger-type block-type block of four.
      Pulley is mainly used to heavy lifting, the structure is very simple, easy to use, in recent years by the plant, construction of all ages, different places tackles different types before buying need to explain your use of occasions and requirements.

Chain rigging, how to choose

 Chain rigging is made of metal chain and ring connection rigging, chain rigging are made of high quality alloy steel, it features a wear-resistant, high temperature, low ductility, the force will not stretch like. The following you simply describes how to select the chain rigging.
Chain rigging in accordance with its main form of welding and assembly of two types of single and multi-its structure just waiting. High-strength chain rigging can be divided into those levels: chain consists of 120 chain rigging, chain rigging 100 and 80 rigging and so on.
1,100-level  load chain  rigging temperatures up to 200 degrees = 100% of rated load, 200 degrees to 300 degrees = 90%, 300 degrees to 400 degrees = 75%
2,100 grade chain elongation rigging A minimum of 20%.
3,100-level chain rigging system will not be mistaken, because only chains and have the same level of accessories to each other.
4,100 level is super-type chain rigging chain rigging, compared with 80 chains, super model biggest advantage is the same diameter, the rated load is higher than 25%, which means that the same rated load , 100 whose diameter is smaller chain.
5,100-level  load chain  rigging surface has a higher hardness and better toughness. Chain links and attachments more wear.

Wire rope pulling hoist usage rules

Wire rope hoist widely used in shipbuilding, electric power, transportation, construction, mining, telecommunications and other sectors of the equipment installation, lifting items, mechanical retraction. Wire rope pulling hoist is a lightweight simple  Hoist equipment   this manual traction machine which has a small size, light weight, compact, portable, stable performance characteristics.
        Wire rope pulling hoist works by the two pairs of smooth self-locking jaws like two steel claw clip rope as alternate as linear repetitive motion, thus completing the processing operations, and can be used on multiple occasions.  lever hoist for your brief usage rules:
(A) prior to use as a  lever hoist  comprehensive inspection and tests.
(2) When using the lever hoist, according to the marks from the weight used, from the weight must not exceed the permitted load.
(3) should always check the rope for wear and kinks, broken wires, broken stocks, which do not meet the safe use must be replaced.
(4) can not handle any longer, because the lever hoist from the weight is limited, pulling force also has a certain size, longer handle the overload will cause the lever hoist use, resulting in damage to components.
(5) The working principle of the lever hoist is the use of wire rope clamp clamped alternately, so requires the use of steel core wire rope core and not with hemp rope.
(6) after use lever hoist maintenance.

Introduce three kinds of electric hoist stopper

Wire rope hoist lifting weight limiter includes stopper, lifting height limiter, run stroke limiter, the following limit these three were described as follows, for your reference:
      1, electric hoist lifting weight limiter: electric hoist operations are overloaded possible lifting mechanism shall be fitted with lifting limiter. Actual weight of over 95 per cent from the nominal weight, the alarm function from the weight limiter should be able to send an alarm signal. Actual nominal weight from the weight in between, from the weight of the stopper should be able to work, you should be able to automatically shortness of breath lifting power source while lowering movement should allow noon.
2,  Rope hoist  shall be fitted with lifting height limiter: When the device rises to extract higher limit prescribed, it shall be automatically cut off the power source of the lifting. In the limit position should allow sufficient spare height has decreased need Haiying depth limiter, when extract device drop down to the design requirements limit position, shall be automatically cut off the power source of the motor for the decline in the direction of the movement should be able to retain power is cut off the power to do the opposite movement.
      3, run the stroke limiter:  hoist and trolley  running in the direction of each stroke limiter to be installed to run in place to meet the design requirements limit the forward direction shall be automatically cut off the power source , you can run the opposite direction. Running speed is greater than or equal to 100 meters per minute higher speeds or when parking position positioning precision is higher, you can install a second stroke limiter.

The details of the safety design of electric hoist

Following is a brief introduction for you to hoist some of the security detail design:
1,  Wire rope hoist  pulley
        Should prevent the rope pulley bracket installation or structure, open the side panel and circular pulley cover the roof and other gaps in the pulley should not exceed certain death is twenty percent of the diameter of the pulley life can be touched, should be set off pulley housing, to prevent wire rope electric hoist rope and pulley cover out of the mouth and whispered friction rope rope failure should be in and out of the mouth and the rope rope rope friction gnawing failure rope should be in and out of the mouth guard with banana or plastic rope sets.
2, the  rope hoist  load chain
        Chain drive system should prevent the chain in the work place or jump to climb chain chain chain and sprocket to ensure smooth functioning correctly meshed measures; necessary, there should be pulled out to prevent the chain from the sprocket Oh also check the whole chain relaxation measures, reliable hardware installation and towline chain hotlinking protection devices should be able to prevent the chain from the sprocket protruding, to prevent the chain in use reverse.
Electric hoist chain ends of the link should be solid and reliable design chain fixtures, should enable it to maturity 2.5 is the name of the chain tension is not permanent deformation of the lifting chains fixtures, when the need should be able to pepper their fatigue strength.
Load side chain should not be Rato firmly assured, fixed the chain link bolts protective measures should, when necessary once again to further tighten the bolts.

Rope according to different classification section

Rope hoist rope on the fact, there are many categories, according to the cross-sectional shape of the rope were classified as follows:
Round stock: concentric layers of wire twisted around, stocks approximately circular cross-sectional shape, you can use the same diameter or different diameters of round steel wire or steel wire shaped shaped wire support.
Alien shares: Shares sectional shape is not round, the common shares of a triangular cross-sectional shape, oval, as well as the recent cross-sectional shape of the approximate share held sling shares. The ratio of round stock steel wire rope on the drum anchor big 3-4 times, beaten dense structure, high breaking strength, wear resistance and long service life.
Wire rope hoist Steel Heart type Si Shengsheng
Fiber Heart: support from natural or synthetic fibers, natural fibers generally used jute, sisal, abaca. Has good oil and shock absorption, good flexibility, but the high temperature resistance, poor lateral extrusion, structural elongation greater.
Steel core: the shares or independent wire rope made of wire. Has a large carrying capacity, high temperature resistance, lateral extrusion, impact, structural elongation, etc, but flexibility, fatigue resistance is poor
Solid polymer core: the round or circular grooves with solid polymer support. Has a high elasticity, tensile strength, resistance to acid salt corrosion and compete to squeeze other properties.

Electric hoist motor repair procedure

Hoist motors,  Wire rope hoist  is one of the most important accessories, when the motor problems, motor repair in the understanding of knowledge that we can repair themselves following a brief introduction on the hoist motor repair knowledge, only for your reference:
        Repair hoist motor should be preceded by site cleaned up, ready disassembly tool, and in the end cap and the shell, the joint line, the upper bearing cover and end caps, etc. to be well marked, so as not to confuse a mistake during assembly. Removing  rope hoist  motor steps as follows:
(1) Remove the belt or disengage the connection pin joint oil;
(2) Remove the junction box power wiring and grounding wire;
(3) Remove the pulley or coupling;
(4) Remove the nut and washer foot;
(5) Remove the front bearing cover;
(6) Removing the front cover;
(7) Remove the fan cover;
(8) Remove the fan;
(9) Remove the rear bearing cover;
(10) Remove the rear cover;
(11) out of the rotor;
(12) Remove the front and rear bearings and front and rear bearing inner cover.
Rope hoist motor assembly and disassembly steps in reverse order. In general, a small motor, just remove the fan cover, fan, front bearing cover and the front cover, and then the bearing cover, rear cover with front and rear bearings, the bearing cap and the rotor so drawn together.

The most effective maintenance methods rope hoist

Maintenance on a variety of wire rope, wire rope, but to want long life lubrication reaches you use requirements, general lubrication method had no significant effect, to provide you with the most efficient rope hoist  wire rope maintenance methods:
      Let rope hemp  Wire rope hoist  heart grease to lubricate wire rope, which is by far the most effective method of wire rope maintenance: The main core of the hemp rope grease is heated to 80-100 ° C, would require lubrication after a good dish washing rope soaked in lifting so saturated, so the grease can penetrate into the cord, when the wire rope hoist operation, oil will seep from the overflow at the core rope to rope knots gap which can not only reduce the rope between wire and wire wear, while the rope outside province also has oil, when the operation of electric hoist pulley or drum to reduce friction between extrusion mill loss. Although this operation is a bit cumbersome, but this method is able to maintain the most effective wire rope electric hoist maintenance methods.
Rope hoist with our daily life is closely related to maintenance work, if not long-term maintenance of wire rope hoist rope often will only have to replace one with two or three months, the traditional wire rope coated with grease appearance for viewing rope wear The broken wire and wire checks are unfavorable, to remind you when using wire rope hoist and try not to slag, sand, coal and alkaline substances such as contacts, if any, once stained with the above substances must promptly clean, to ensure the This is the life of wire rope electric hoist much longer.

How to replace electric hoist reducer

     Rope hoist  reducer is to ensure the normal operation of the important parts, Rope hoist used for a long time or improper maintenance will result in some failures reducer, hoist gear unit needs to be replaced in the case, be sure to strictly follow the installation related issues, seriously assembly and use.
First install the hoist motor and gear reducer Confirm whether intact, and strictly check the motor and reducer size of each part is connected to match the motor positioning bosses, such as the input shaft and reducer groove dimensions and tolerances .
Secondly reducer reducer flange Unscrew the screws on the outside of dust hole, adjust the clamping ring so that the side holes and dust holes, insert hex tightened. After removal of the motor shaft key.
      Finally, the motor and reducer natural connection.  Wire rope hoist  must be guaranteed when connecting the output shaft of the motor reducer input shaft concentricity, and both lateral flanges are parallel.

How to choose electric Wire rope hoist

How to choose  Wire rope hoist 
In the daily use of the process of  rope hoist ,  rope hoist operating speed for pay particular attention, because the speed of the call directly affect the efficiency of the production of construction machinery, here offers several more practical rope hoist speed control method for you to save time, create more productive value.
1, the motor rotor resistance control, the advantage of simple structure, low prices, quality in general, and its deficiency is relatively large changes in speed, unstable.

2, through the hydraulic pusher for speed, you can get a relatively steady rate, but its speed is low, in the middle of the soft Xpress, but when in use must be carried out for rope hoist mechanical components part of the transformation.

3, through the dynamic braking speed control method is characterized by the stall speed can be adjusted, and high energy efficiency, safety and reliability, the disadvantage

lies in the low grasp not.

4, through the inverter, which is an ideal frequency control method that can realize stepless speed regulation, but also has higher control precision, easy to use and maintain,

and can also be operated remotely.

chainb lock brake performance test

chainb lock brake performance test

Is more commonly used chainb locks  hoist equipment   also known as the hoist, crane hoist and so on. chainb locks easy to operate, easy to carry, loved by the users.

By introducing the understanding, I believe we all pull hoist opponents have an overall understanding, in order to make everyone a better understanding of the basics of  manual hoist s, today we look at the main manual hoist brake test.

Test, the use of manual hoists lifting heavy objects of different weights, as shown below, to be a certain height after lifting heavy objects, keep still, one hour later, observe whether the whereabouts of weight.

After the test, prove their own weight without the whereabouts of this manual hoist brake performance tests show good work correctly.

lift hoist oil spill occurred in the use of reason analysis

lift hoist has been widely used in various high-altitude operations, some customers will be reflected in the course of the lift hoist oil spill situation occurs, what causes it? Remedial measures, what does?
First, the  lift hoist  caused by the frequent use of the aging
1, the ring after long-term use, friction and wear will make it lose sealing performance, or aging rubber and other materials to make seals completely damaged, as well as due to wear between the shaft and the sleeve, so that the gap between the bore axis increases, causing leakage .
2, tubing use plastic pipes, pipe joints use plastic joints, after long-term use of the future, there will be material aging, resulting in tubing and fittings rupture, causing oil leakage.
Second, the lift hoist did not go through rigorous scientific design
1, there is no reasonable oil return path, so back to the oil spill caused by poor equipment.
2, casting box, the quality does not comply, appear blisters, pores, cracks, loose tissue and other defects, but not in time, the device during use, these defects is often the root cause of oil spill equipment.
3, due to a combination of housing and cover surface machining, flatness tolerance and surface roughness serious too coarse, or residual stress caused by excessive deformation, so that combination of surface fitting is not tight, loose or damaged fasteners phenomenon, often can cause leakage.
4, the seal has not been rigorous checks, or improper seal dimensions, matched with the seal caused by the irrational structure of the device leakage occurs.
5, the seal or the conditions of use are incompatible, resulting in equipment leakage.
Three, unauthorized access or improper maintenance
lift hoists problems, should be promptly requested professional maintenance staff are not allowed to repair, but can not continue to operate if a problem occurs, prevention efforts should be prepared in advance.
Summary: lift hoist at work, as a whole, any part of the problem, will result in an unsafe risk, so it is vitally important to do preventive work in advance, so the problem should be timely  Hoist equipment   to find professionals to help solve.

How to choose lift hoist lubricant

   lift hoist use and routine maintenance will be used to lubricants, lubricant many varieties in the choice, there are many degrees and precautions on the inside,I briefly describes how to use lift hoists bearing lubricant and optional Precautions:
      1,  lift hoist  velocity:
Low hydrodynamic oil film is difficult to form, should use a high viscosity oil or grease penetration of small, high speed, to reduce power loss, should use low-viscosity oil or grease penetration degree.
      2,  Wire rope hoist  operating temperature:
Low temperatures should be selected viscosity, low pour point oil; should be selected to work under high temperature viscosity, high flash point and good oxidation resistance to engage in oil; Operating temperature changes, the appropriate selection viscosity-temperature characteristics, High viscosity index lubricant.
      3, the hoist working surface state:
Work surface roughness, required viscosity of the lubricating oil or the penetration of small grease, with the surface of the gap is small, requires the use of low viscosity lubricant.
      4,  lift hoist  drive type:
Different types of gear unit on the lubricant to be different in many respects should be targeted selection of the exercise of the transmission in the form of lubricant.
      5, lift hoist work load:
The higher the viscosity of the oil, the greater the carrying capacity of its film, so the work load is large, should be used in high viscosity and good oil and extreme pressure lubricants. Hoist at work and have impact load should adopt the viscosity of the oil or grease penetration small.

Lever hoist the details of the requirements

     lever hoist  is widely used, mainly used in shipbuilding, electric power, transportation, construction, mining, telecommunications and other sectors of the equipment installation, lifting items, mechanical retraction. General shipyard lever hoist more, I came briefly under the lever hoist the details of the requirements for user reference has been avoided during use problems.
      1, lever hoist load requirements:
When using the lever hoist, lifting allowed to exceed the allowable load, according to the marks from the weight used.
      2, lever hoist handle requirements:
When using do not handle any longer, because the lever hoist lifting capacity is limited, two-handed pull force also has a certain size, longer handle the overload will cause the lever hoist use, resulting in damage to components.
       Wire rope winch  and chain lever, the biggest difference lies in the material, wire rope pulling hoist rope for inspection prior to use, there are strict requirements
      1, lever hoist wire rope inspection:
Always check the rope for wear and kinks, broken wires, broken stocks, which do not meet the safe use must be replaced.
      2,  lever hoist  wire rope requirements:
      The working principle of the lever hoist is the use of wire rope clamp clamped alternately, so requires the use of steel core wire rope core and not with hemp rope, hemp core rope due to soft and elastic, the clamp after loosening the clamping phenomenon that is unsafe.

Phase voltage Wire rope hoiststructural characteristics analysis

Phase voltage Wire rope hoist  structure: gear, starter wheel, mechanical brakes, coil, rotor, chain guide wheel.
Chain hoist with two gears, helical gear speed level is so smooth transmission, low noise.
Wire rope hoist load chain with 80 chain, made of alloy steel and carbon black after treatment with anti-wear, anti-corrosion effect, increasing the  load chain  life.
Wire rope hoist upper and lower limit control: When the chain up to the limit position, the chain hoist can be off automatically, to prevent the chain transition tightened. Upper and lower limit, reverse protection.
Phase voltage  rope hoist  has an overload protection device to avoid the adverse consequences caused by overloading.
Wire rope hoist motor with thermal protection device, when the motor is caused due to frequent use temperature is too high, the device will automatically cut off the power to protect the motor will not be burned.
Phase voltage Wire rope hoist with gear box, gear filling oil for better protection gear.

Mini rope hoist can be a single hook, double hook use

 Civilian  rope hoist  ，  hoist equipment  in the field is often referred to "micro rope hoist," mini rope hoist relates to the use of shopping malls and even families, so people also known as "civil gourd", micro rope hoist hoist is the only an optional single or double hook lifting hook gourd.
      Since close to the people's lives, and Shanghai today comprehensively expounded under mini rope hoist, mini rope hoist in fact not just one model, but there are three, three were HA, HK, HG. It can be said that every type of hoisting speed, altitude, electrical power, weight lifting are not all the same. The main specifications of HA H-A101, H-A102, H-A103, H-A104, etc., because of the use of single hook hook is different, so different weight lifting; HK's main specifications are H-K201, H-K202 , H-K203 three, the nominal weight of 200KG, 250KG, 300KG; HG The main specifications of H-K201, H-K202, H-K203 are three nominal weight and HK series.
      Overall, miniature gourd smart design, easy to use, it's hoist hook design is divided into dynamic and static loading loading two states. When the limit stopper baffle met, then the elevator will stop automatically. When the rope reverse ascend, hoist motor will automatically stop working.
      When using mini rope hoist, we also need to pay attention to some aspects, such as use, it is best read about manual, another overload is bad, likely to cause accidents, lifting at the same time, no one is standing beneath the lifting objects , do not use the elevator as manned. Workers also pay attention to the case of not drinking operating mini  Wire rope hoist   do not disassemble its parts.

wire rope hoist system of work

  wire rope hoist  need a lot of the normal operation of an auxiliary external conditions, such as ambient temperature, electric chain hoists are probably in -20 ℃ ~ +40 ℃, the working environment is not easy to be too wet or dry and filled with special mixed gas plant. rope hoist structure reducer: A three-axis helical gear set rotating mechanism, gears and gear shaft with heat-treated alloy steel, box, cover made from high quality cast iron, fitted tightly sealed. Reducer self-contained unit, handling is very convenient.
       In the middle of their working system JC25%, while intermediate work systems  Rope hoist  weight reduced by 30% when the system is JC40% heavy duty electric chain hoist. Heavy duty system JC40% of rope hoist is used in relatively heavy work load often requires a higher safety factor rating or the case.

Hoist a necessary condition for stopping operation

Rope hoist used more and more widely, the problems have gradually diversified, but no matter how hoist stop operation will affect the work efficiency may cause serious adverse consequences.
For many years of inspection experience, to talk about when you need to stop the hoist operation:
      Rope hoist  to stop operating the necessary conditions are the following five points, but you can be clear that these two points on the normal operation of hoist will have a great impact.
      First, someone was hanging objects or have floating items, then please stop operation;
      Second, the workplace dark, unable to see the sites, command signal and the inability to see was hanging items, then please stop operation;
      Three, tied hanging strong or imbalance which may slide, please stop operation;
      Fourth, overloaded or weight of the object is unclear, ambiguous tension direct buried objects and phenomena such as the oblique oblique hanging, then please stop operation;
      Fifth, if the structure or components affecting safety defect or injury, such as brake safety device failure, hook nut locking device is damaged, rope damage to be scrapped, the need to stop the operation.
      In these cases, stop the operation of the  wire rope hoist   is a virtue, is to avoid accidental injury and personal safety.

lift hoist parts damage and adjusted

lift hoist parts damage and adjusted
A brief introduction about the  lift hoist  parts damage, adjustment and relevant knowledge for your reference:
1, parts cracks should be replaced immediately;
2, the brake friction lining wear volume of 50% of the thickness of the original gasket should be replaced;
3, the brake wheel working surface wear volume 2 ~ 3mm should be replaced (whichever is greater large diameter and small diameter take a small value);
4, the spring should be replaced plastic deformation occurs;
5, pin or shaft hole diameter wear volume of the original diameter of 5% should be replaced;
6, the  lift hoist  relaxed state, the brake band (block) and the brake wheel gap should be uniform, the gap value is: brake band and brake drum 1-2.5mm; brake pad and brake drum 0.25 ~ lmm, exceed this requirement should be adjusted brakes.

Works -wire rope winch

  Works -  wire rope winch   the use of leverage, flip forward or backward with human handles a smaller lever force, converted into a larger role in the tonnage weight of the load linear motion, the completion of lifting, pulling and tensioning Three types of operations.

      Toggle lever forward or backward from the handle, the movement will alternately drive the front and rear parts of the parallel four-bar linkage mechanism for gripping, clamping, loose clamp action. Body member through the jaws, the lower the load rope clamp mouth, the interface between the clamp and the  Wire rope   due to the tightening action of the spring, and always maintain clamping state, the friction force between the interface. The affects of the drive, the parallel four-link load clamping mechanism originating tilted towards further clamping rope. Traction rope pulling a lever linkage due to other effects, the front and rear clamp body to hold the load rope alternating sequence, and another pair of sliding through relaxation, the lower clamp, the realization raise or lower the load operation .

      wire rope winch  aka "wire rope winch," I have a separate garter spring alternately sensitive, stroke loss, high mechanical efficiency, the advantages of wear and tear on the wire. Clamp using alloy steel, after finishing, clamps capability and reliable. Durable good operating performance, and maintain a good processing performance.

Chain, wire rope pulling hoist structure at different points

lever hoist according to the structure can be divided into two categories: chain hoist and wire rope pulling hoist. Can be divided according to the material aluminum lever hoist, lever hoist iron shell.
      One, also known as chain lever hoist down chain lever hoist is a kind of manual lifting tool for heavy duty level. And chain lever hoist advanced structure, safety and reliability, light weight, easy to carry. It is driven by a human through the handle rope or chain to drive extract lifting device movement. Its compact, easy to carry, easy to operate, suitable for remote and wild lifting, pulling cited work, but lifting and pulled cited distance unrestricted by the choice of rope or  load chain  length.
      Chain lever hoists used in factories, mines, construction sites, docks, transportation and other occasions, equipment installation, cargo lifting, stationary objects, the ideal tool for lashing and traction, especially in traction at any angle and in small venues, open operation and no power in the case, but also demonstrate its superiority. Chain hoist new, efficient, safe, durable with lifting, pulling, tensioning three functions, the whole structure, reasonable design, high safety factor, long life, especially for field conditions no power source.
      Two, also known as  Wire rope winch  wire rope pulling tractor, is a new, efficient, safe, durable lifting products, with lifting, pulling, tensioning three functions, the whole structure design, safety factor high, long life, especially for field use with no power source. Wire rope pulling hoist lifting weight: 1.5T, 3T is a new, efficient, safe and durable lifting products. Major nominal weight of 800 kg, 1600 kg, 3200 kg.
       Wire rope winch  used in factories, mines, construction sites, docks, transportation and other occasions,  Hoist equipment  installation, cargo lifting, stationary objects, the ideal tool for lashing and traction, especially in traction at any angle and in small venues, open operation and no power in the case, but also demonstrate its superiority.

Noise causes huge lift hoist

      lift hoist is powered by a human or mechanical reels, winding traction rope to complete the work of the device. Electric winch consists of motor, couplings, brakes, gear boxes and roll form, mounted on a rack. Can enhance the vertical, horizontal or inclined pulled cited heavy loads. With the widespread use of the day, there have been some problems affecting the efficiency, the process of using the most common problem is the noise problems:

① chassis with box-shaped structure, not all welds are continuous welding, various chassis weld length, height different positions, rigid chassis, there is a big individual differences, and some resonance effect, the machine if it was a little vibration noise Zoom;

      ② from the steel plate welded into the chassis, do not have the shock absorption silencer function if its natural frequency and the gear mesh frequency close to the individual machines may cause weak due to vibration caused by the larger gear total shock, causing noise value rises.

      Hoist lifting height for loading and unloading large work frequently the case, speed performance, make empty hook rapid decline. The installation place or sensitive materials can lower the speed.

1, electric windlass as lifting capacity, speed change is easy, convenient operation and safety, therefore, in the lifting operation is often used as a hoist equipment，
2, more types of electric winch, roll divided by two kinds of monocular and binocular. By way of a reversible drive gear box and friction.
3, slow winch (reversible electric winch), it is simple, safe and reliable lifting heavy objects, but also long-distance operations, is commonly used as a tool for the construction site.

100 t chain hoists characteristics and the use of premises

100 t  manual hoist  related components description:
load chain: the chain of higher intensity; counterparts at the welding fine, after induction hardened meet ISO3007-1984 international standard chain technical requirements; adapt to sudden overload work; hand zipper feel better; alter normal hoist only vertical drop , from multiple directions, at a 45 degree angle of pull, adapt wider.
Hook: High-strength foot hook material, advanced alloys, so that the work does not bear the overload fracture, but the gradual deformation, higher safety factor; hook at the new design, so that the goods will not be decoupled.
Parts: the main components are made of high quality alloy steel, the implementation of strict size, weight checks, to ensure full performance of each component.
100 t  chain block  body: slim design, innovative and generous appearance; ergonomic, light body work activities interface is small, adaptation to the environment.
Spray: advanced spray treatment process, both inside and outside hanging plastic, used for longer list are new as ever.
100 t  chain block  Features:
100T chain blocks, with reasonable design, advanced structure, beautiful appearance, small size, high mechanical efficiency, hand-pull small, high mechanical strength, toughness, safe and reliable, easy to maintain, durable and so on.
Use spaces: 100T chain block can be used in factories, mines, electricity, construction of production and construction, piers, docks, warehouses, machine installation, cargo lifting, loading and unloading of vehicles, especially for open-air no power supply.

rope hoist lifting heavy gauge safety device

  Wire rope hoist  overload limiter - When lifting heavy gauge, eccentric bracket shell around the hoist side panel positioning mandrel rotates counterclockwise in to a preset distance proximity switches, proximity switches off lifting contacts Wire package circuit, cutting off  rope hoist lift hoist  power, the  rope hoist stops running, play overload limiting role in achieving the safe operation of the crane, lifting heavy gauge safety devices to improve the reliability and security.

      Countries in this year's increase in the use of special equipment installation of the new requirements, all of the installation of all  rope hoist overload limiter.  rope hoist overload limiter, balanced pulleys mounted  rope hoist  rope hoist  housing unit and between the end plates,  rope hoist housing end plate at one end with a positioning mandrel and the stopper plate, positioning mandrel fitted with a shaft extension header eccentric bracket, balancing roller device hanging on one end of the eccentric shaft extension holder head, with the lower holder of the eccentric pin, the eccentric side of the bracket is provided with a supporting plate, the support plate section be equipped with a proximity switch, an eccentric bracket overhanging the center and the eccentric shaft positioning bracket spindle hole center-biased 3 mm.

Multifunctional wire rope hoist different points

Multifunctional  Wire rope hoist  wire rope hoist should have all the regular features:
1 two-speed hoist, two-speed operation. High wire rope hoist lifting height, large lifting capacity.
2  lift hoist  with dual brake system. Safety gate devices.
When the multi-function  rope hoist lifting use process in broken teeth. Broken shaft brake failure occurs, conventional  rope hoist can not play a protective role in the accident consequences will be disastrous. Multifunctional wire rope hoist the end of the reel set up security gates, security gates can reel speed exceeds the rated speed of 3-5 times, can smoothly roll brake. Our secure braking torque and brake friction materials made a trial, which will eventually help secure gateway has a very high reliability. Meanwhile, the action does not affect the safety gate hoist other structural damage.
3 super, underrun protection device.
Load protection overload protection is common, for some special circumstances, such as  rope hoist for lifting or similar underground gondolas this condition, the required  rope hoist crane being lifted can not occur on the rail car stuck or broken rope or fixed rope off phenomenon, it requires a super  rope hoist, underrun protection.  rope hoist overspeed protection is also necessary, when the  rope hoist conical surface and the second brake brake brake surface wear or flat voltage fluctuations, resulting in a so-called  rope hoist coaster, set at high speed shaft sensor will cut off the main power hoist play a protective role.
4 The remote control and manual control manipulation and use.
Remote control with manual control and manipulate our first time using the multi-rope hoists used on the lifting height is large, long distance running wire rope hoist, using the remote control is particularly important, so to bring the convenience of manipulation. However, manual manipulation is essential, which is mainly to increase reliability of electric wire rope hoist operation, to prevent unexpected incidents. On the remote, manual manipulation of the remote control can be designed subject to the manual remote control or manual control circuit obey.
5 double limit device.
The first dual-limit device is a conventional  rope hoist limit the mechanical action of the limit switch off the fire, it can play  rope hoist upper and lower limits of high level of protection, which cut off the main circuit power hoist.
6  hoist and trolley  anchoring device.
Electric car anchoring device for hanging or dual suspension monorail hoist more applicable when the hoist is not working, and some special places can hope to hoist anchor at a designated place and time cut off the main power hoist. It is also an effective protection measures, especially for the wind load and vibration loads using the site.
7 overspeed protection device.
Load protection overload protection is common, for some special circumstances, such as  rope hoist for lifting or similar underground gondolas this condition, the required  rope hoist crane being lifted can not occur on the rail car stuck or broken rope or fixed rope off phenomenon, it requires a super  rope hoist, underrun protection.  rope hoist overspeed protection is also necessary, when the   rope hoist  conical surface and the second brake brake brake surface wear or flat voltage fluctuations, resulting in a so-called  rope hoist coaster, set at high speed shaft sensor will cut off the main power hoist play a protective role.

Chain hoist components should meet the criteria

1,  load chain shall comply with GB 4829 and GB 5802 regulations.
2, the hook should be consistent with the provisions JB 4207. Hook should be installed under the provisions comply with ZB J80004 mouth hook locking device. Should be able to hook in the horizontal plane of rotation of 360.
3, tail ring  Chain Block  limiting device must be installed and should be able to meet the following requirements: When the chain hoist in a no load condition, the hand chain drop side tension is applied to 2.5 times the rated hand, the machine should be able to reliably to withstand, without breakage.
4, chain hoists chain guide should configure the appropriate device and file chains, the chain and sprocket engages properly play a supporting role, but also in.
5,  manual hoist  unattended and shaking, make sure the chain may come off from the sprocket ring groove.
6, Z-level chain hoists lifting sprocket and cruises must have suitable rolling bearings.
7, brakes, gears should be equipped with proper guards against dust, dirt from entering.
8, the brake is a friction plate, consisting of the pawl and ratchet mechanical brake, when to stop pulling the hand chain, should be able to stop immediately and a reliable prop lifting loads.

How hoist hanging objects from the car and run time

Wire rope hoist hanging objects from the  Hoist and trolley  and run when improper methods. Wire rope hoist then make hanging objects swing accidents. Wire rope hoist  lifting hanging objects, when the wire rope or chain tension should be parking, Wire rope hoist according to the direction of the hook again to identify the hook jitter, while Wire rope hoist workers hanging objects should be checked whether the hanging prison; Wire rope hoist lifting is not too Meng, hanging objects from the obstacle when accelerating until after lifting speed; Wire rope hoist lifting the big easy hanging objects typically over a secure channel high _ the highest thing 0.5m as well.
Wire rope hoist hanging objects runtime. When conditions permit, it is best hanging around 0.5m from the ground by workers in the  rope hoist  rope hoist hanging objects behind help steady object and work under the direction of the Wire rope hoist run around obstacles. Do not run rope hoist intermittent, long-distance running, it is best to send electricity long run as well. rope hoist hanging objects should be to ensure the smooth running, Wire rope hoist if hanging objects swing or jitter, should be running side edges steady running hook, not let it shake or swing.

Inverter rope hoist Application technology

Inverter  rope hoist  Application technology
I. Conventional inverter lifting mechanism
1. Structure Introduction
Frequency control technology in a tower hoist the transmission mechanism used in China for nearly 10 years, despite some successful applications experience, and there are a lot of inverter hoisting mechanism is now running the site, but compared to other industries, frequency conversion technology in the application of  rope hoist  tower far not reached the required level, which has cost reasons, there are also technical reasons.
Domestic and foreign programs currently used by a typical, technically speaking, very much the same, except that:
(A) drive different brands, which uses different control loops;
(2) The system is open-loop (no PG) or closed (with PG)
(3) in the form of mechanical structure is not the same: L-type arrangement, п-type arrangement or a font layout, etc.;
(4) is not the same type of gear, such as: cylindrical gear reducer or planetary gear; ratio is fixed or variable speed ratio and so on.
On the drive control technology, the difference was not involved in the control of the above changes in the way, are using an inverter for speed control of a motor typical pattern can also be referred to as conventional inverter hoisting mechanism. In all of these conventional inverter institutions, LIEBHERR EC-H type in the tower hoist mounted on a lifting mechanism frequency characteristics of the most prominent, and it uses 250V motor and matching drive, the configuration variable speed ratio deceleration machines, L-type arrangement. The program has a good lifting speed characteristics, the drawback is the high cost of the system, and general poor parts.
2. Conventional inverter hoisting mechanism design elements
(A) number of motor poles and power check
When the lifting mechanism of the basic parameters (eg: maximum weight, maximum operating speed, etc.) are given, the necessary number of poles of the motor and the power of determination and calculation, the design points are:
a) motor output speed should be less than 3000 rev / min (from the gearbox input stage operating speed restrictions);
b) the system should be less than the maximum operating frequency of 100Hz (the higher the frequency, the greater the power loss of the motor will be damaged constant power characteristics, lifting capacity greatly reduced without practical value);
c) checking the rated motor torque for maximum weight (considering the total transmission ratio, efficiency, magnification, etc.);
d) The rated power of the motor at high speed for checking from the weight (considering the total transmission ratio, efficiency, magnification, etc., if frequency is close to 100Hz, should be considered effective power reduced by 10 to 15%).
When selecting the motor power, according to the above conditions will be able to determine the basic gear reduction ratio and the motor power and the number of poles.
(2) electrical control system design
a) the selection of the inverter
When the system's electric motor is determined, you can proceed with the control system design. The first is the drive selection. Inverter on the market now many brands at home and abroad, the level of control and reliability vary greatly, technically can be roughly divided into the V / F control, vector control and DTC Direct Torque Control of three. Tower hoist for lifting mechanism, it would be best used with a vector control function or is a DTC Direct Torque Control function of the inverter, this inverter more brands, designers can according to their level of familiarity with technology support, other industries such factors as the use of plants to choose from.
Because the frequency of different brands, the same power inverter overload capacity and rated current value is not exactly the same. So, choose the drive capacity, not only depends on the size of the rated power, but also to check the rated operating current is greater than or equal to the rated current of the motor, general rule of thumb is to select the motor power inverter power is greater than 10 to 30 percent.
b) the selection of energy resistance
As electric hoist with inverter system, its design focuses on the state motor is in regenerative braking system reliability, because this system failures often occur when falling in heavy conditions, such as slip hook, overspeed, overvoltage and so on. That decreased weight condition when the inverter system will directly affect the performance of the entire lifting mechanism can operate safely. This requires a clear understanding of the designer feedback inverter drive system working process, in order to be aware of.
Most of the drive chain hoist product description on how to choose the resistance value of the energy and power are not very clear description, and often their recommended standard does not fully meet the requirements of lifting working conditions, while the article discussed in this regard is also rare, so the frequency of lifting control system design, the resistance parameter selection seemed to be somewhat confusing. This article will state motor operates in regenerative braking system when the working mechanism for qualitative analysis, the reader can get through these analyzes further calculation method for resistance parameter.
① resistance value is selected
You can sample the basic parameters given by the drive to determine the basic principle is to consider the DC link voltage (decreased weight conditions will exceed 600VDC) case, the resistor current does not exceed the rated current of the drive.
② resistance power selection
To accurately select the resistance of the power is very important, if the selection is too large, it will increase the system cost, too small will result in unreliable operation. But to reasonably accurate selection of resistance power consumption is a relatively trivial matter, many factors affect the parameters, such as: motor power size, gear reverse efficiency, running down the length of time, the size of negative acceleration, deceleration time and the moment of inertia of the transmission parts, etc. will affect the resistance power of selection. Therefore, we have to first drop from the analysis of system operating conditions in the working process, resulting method for determining the resistance power.
Decline in power is by weight "transmission parts", "motor" (At this point in the power generation state), inverter reverse rectifier circuit and then transmitted to the brake unit "resistor R" on, if the transmission link Reverse the lower the efficiency, resistance smaller power consumption.
Then there are:
"Resistor R" heating power consumption of the transmission path + = heavy decrease the power consumption of the power
Resistance can be further power consumption P expression:
Steady uniform drops in consumption:
Pe = ωm × Me × δ ①
Where: δ is the reverse transmission efficiency
Deceleration peak power:
Pm = Pe + δ × J × (ωm-ωd) / Ta ②
Where: J is the moment of inertia of the transmission system
Combining style and type ① ② are:
When lifting mechanism running at rated power status and high-speed drops, if this deceleration command is given, in the early stages of deceleration, the resistance will reach maximum power consumption;
The deceleration time is too short, it will cause the power consumption in the resistance peak rising;
System, the greater the moment of inertia and the load, the time of deceleration, the higher braking torque will cause the power consumption in the resistance peak increase;
When the mechanical efficiency of the transmission system, the lower the resistance power consumption is also lower.
See, to accurately calculate the resistor consumes power, it is necessary to drive the various components that the moment of inertia, the deceleration start point corresponding end of the speed and working speed, deceleration, and the length of time the system load is size. To determine the exact values   of these parameters in the system design stage there is a certain degree of difficulty, first, in the electric chain hoist is not completed before the product can not be accurately measured or calculated the transmission parts inertia; Second, in actual use , the system will follow the deceleration characteristics and needs of the scene change. So in most cases, neither strictly calculated resistance power. Experience the value of the motor power is generally 40 to 70%, and the reverse gear efficiency is low, you can use a smaller resistance power.
As long as the inverter system to fully understand the working status of the deceleration process, the system can be designed according to the actual performance to correct resistance parameters.
c) the control program to determine
The first is the system uses the open-loop or closed-loop control of the choice, I believe that the general tower hoist lifting mechanism can be used open-loop control mode, those requiring high accuracy speed control only to consider the case closed-loop control. If you want to constitute a closed loop system, there must be PG (encoder), the detection circuit and connecting lines. These links increase the complexity of installation; increase system cost; more importantly, reduce the reliability of the system, because in the closed-loop system, the feedback loop any small mistake may cause the system disorders.
Second is the speed of a given mode selection, the vast majority of the inverter has a variety of speed input methods, such as multi-stage switch input modes and analog given way to many brands of converter also has a bus communication interface. For conventional inverter hoisting mechanism, they use a switch as a speed reference, so different from a PLC or relay logic control. The author believes that the most simple system architecture should be the PLC and inverter communication interface transmission speed and control commands, so that the control cabinet cable minimum.
Second, the dual-frequency  lift hoist
1. Develop dual-frequency necessity lift hoist
So far, the drive tower hoist lift hoist on the application already has nearly 10 years of history, we know from the above analysis, frequency conversion technology tower hoist operation will bring more benefits and relevant national extension departments and industry associations are also organized many seminars inverter technology applications, but the actual amount used is not ideal, the industry only a few powerful OEMs launched frequency lift hoist, which is much can not be compared to other industry applications level. Reason to believe that limiting frequency conversion technology in the industry to promote the main reason is:
Frequency of service after a system failure is difficult, compared with conventional systems, increasing the tower hoist down maintenance time, increased user downtime losses;
Wire rope hoist inverter control system cost than conventional hoisting mechanism, increasing the promotion of difficulty;
Frequency lift hoist is about 60% of the cost of the inverter, the inverter due to the current price is still high, so the total system cost than conventional hoisting mechanism, but with the growing popularity of inverter technology and improve the price of the inverter there is a large decline in space, while the cost of conventional hoisting mechanism basically no longer potential. We believe that in the near future, the cost of conventional lift hoist will be no absolute advantage at all. Therefore, it is imperative industry technology workers how to design a service to reduce the pressure lifting system frequency.
2. Tower hoist lift hoist operating situation analysis
Measure a tower hoist ability to work not only with the hoisting mechanism of the maximum weight of this argument, but more important parameter is the size of the working torque, which is the safe operation of tower hoist an important indicator. It is because of torque limit parameters, tower hoist range is not possible in any work under all  Wire rope hoist  lifting maximum weight, but the actual operation of the construction site from the point of view, the maximum weight  lift hoist  tower work Condition is very small.
Vanda company's 5613 tower hoist, Wire rope hoist tower of the maximum lifting weight 8t, maximum working radius is 56m.
"Light-load area" from the weight of less than 4t, working radius of 56m, operating area of   9847m2;
"Reload zone" from the weight of greater than 4t, working radius of 24m, operating area of   1808m2;
"Full" area from the weight equal to 8t, working radius of 14m, operating area of   615m2;
Its working Dead ( hoist and trolley  minimum working radius) is approximately 3m, an area of   28m2.
After calculate: If 4t weight lifting weight load as the demarcation point, "overloaded zone" area of   operation only "light-load area" operating area of   18%.
And hoist tower at the site for the actual operation of statistics, a computer equipped with hoisting mechanism 8t tower hoist, lifting 4t more real load conditions is very small.
Through the above analysis are:
Tower hoist lifting capacity by half, more than 80% of the working conditions are not affected.
This gives us an idea: if the current by an electric motor and a variable frequency inverter control lift hoist to change the success rate of halving the two motors and two small inverter to co-drive, even if there is a motor or inverter failure, tower hoist in most cases still be working as usual. This greatly reduces the pressure on OEMs service, the user is also very beneficial.
For this particular tower crane Wire rope hoist electric hoist, lift hoist if dual frequency lifting program can:
At light loads, single-motor operation, can achieve energy savings and prolong system life purpose;
There is a drive is damaged, the work can be a single motor, the system will automatically disconnect the faulty circuit, stopping the machine can do maintenance on the system, greatly reducing the tower hoist manufacturer's sales pressure;
There is a failure of a motor, the same can be single-motor work, in most conditions without affecting the Wire rope hoist tower work;
Under heavy load, dual-motor work to perfect hoist tower frequency performance to meet the operational requirements;
The power components become smaller, reducing maintenance costs and difficulty.

Explosion-proof rope hoist points

1 explosion-proof  rope hoist  electrical components include:  lift hoist  and run the motor, control box, control button, stopper all adopts self-contained flameproof chain hoist equipment.
2, the use of soft power cable introducer.
3, rope hoist machinery parts explosion measures taken to prevent rope hoist running friction, impact sparks produce high temperature, the relevant parts for treatment.
(1)  lift hoist  and running gear unit into the amount of machine oil.
(2) rolls of coated wire rope grease.
(3) around the rod limit stopper stopping blocks and then applied to the stopper plated bronze or stainless steel.
4,  Wire rope hoist  normal working hours of each surface temperature does not exceed 110 ℃.

Electric hoist motor knowledge

Wire rope hoist, wire rope drum is centered at one end of the motor, through the middle of the rotating shaft, transmitting power to the other side of the reducer, reducer drive reel (or chain)  Wire rope hoist .
rope hoist is a motor, gear and wire rope drum (or chain) as one of the small  Hoist equipment ，  most also with a trolley, with single girder bridge or gantry rope rope hoist, wire rope to form a complete mechanical hoist.
Now hoist motors use more conical rotor motor, this motor can power itself when braking.
1. Please use the instructions and memorize the contents of the nameplate after the operation.
2. Please, the lower limit stop block adjustment before lifting objects.
3. rope hoist before use make sure the brake situation is reliable.
4. If it is found before the use of electric wire rope hoist the following unusual circumstances, never operate.

Electric wire rope hoist with upper camber cause analysis

To ensure the bridge  wire rope hoist  the load when the normal operation of the bridge wire rope hoist manufacturing conditions provides:
No load, the main beam should L/1000 camber (L is the span);
When reaching the maximum permissible load under the main beam deflection should not exceed L/700.
In this range of camber and deflection, bridge  hoist and trolley  an maintain normal operation, so the bridge  Rope hoist  double beam or single beam at the time of manufacture must have L/1000 camber.

Crooked pull device for Wire rope hoist analyze the importance of work

Wire rope hoist is one of the procedures specified "no pull oblique hanging crooked", but in the actual lifting process, the quality of personnel due to construction or objective conditions caused widespread pulled oblique hanging crooked phenomenon. Once that happens, it is easy to damage the  Wire rope hoist ，  ranging from making cable,  Wire rope  scrapped, while in the whole Wire rope hoist scrapped or personal injury, resulting in some economic loss, seriously affecting the construction production. For problems in practical work designed a pull oblique hanging crooked can prevent a device, the device is the use of oblique hanging crooked pull rope when a certain deflection angle, making installation on the  rope hoist  limit switch work, which automatically disconnects the lifting contactors, limit lifting capabilities. The mechanical part of the device consists of Shengka, two welded assemblies with a stopper components. 1 Shengka is soldered with the balance wheel relative to the center of the arc at the lowest point of the housing, having regard to the design principles in either direction from the protection function can be, so the design component 2, the center hole is designed to be round shape, thus making each direction oblique pull hanging askew against the deflection angle of the same; travel limit switch contact bar against pull oblique hanging crooked size of the angle to be adjusted according to the actual working conditions, For the angle becomes large, there are three methods : the component 2 center hole enlarged; would reduce the sensitivity of the limit switch; Works First, according to the actual work situation, set the appropriate skew angle rope, when pulled oblique hanging crooked angle greater than the set value, the rope skewness just enough to make the center hole assembly 2 hole edge touches the limit contact bars, causing limit work. The height limit function of the device is in the lifting operation, if failure occurs due to malfunction of firearms off, but this time without the driver's ideological focus, making the hook constantly lifting. When the  rope hoist  hook fast approaching, the time has also been close hook travel limit switch contact bars, resume a lift, it will surely bring feeler shifted or on the roof, causing ST disconnected from the hook also stopped l, played height limit function. Now you understand me  ？

Hoist the main operating within the framework of

The main hoist is to run the Department of the Ministry, if the part is not running, then this machine can only say a basket case, in general, there are four active  Wire rope hoist  and driven wheels,Hoist and trolley， but the wheels over four, it must with a balanced frame so that the load dispersion. The metal structure of the bridge from the main beam and side beams, divided into single girder and double girder bridge bridge categories. Master Liang Duanliang on wheels for supporting the bridge. Box-shaped structure can be divided into the right track and off-track boxes and other boxes. Main beam from the upper and lower flange plates and sides of the vertical web composition, which is characterized by simple structure, suitable for mass production, but the larger self. Partial rail box hoist double girder and partial rail box single girder cross-section are from the upper and lower flange plates of different thickness and composition of the main and sub webs. Characterized in that the weight is small, but the manufacture of the more complicated. Four truss structure consists of four combined into a closed space plane truss structure, manufacturing is more complex, less fatigue, fasting truss structure similar to the off-track box girder by four steel plates form a closed structure, in addition to the main webs solid web-shaped beam, the other three steel plates in accordance with the design requirements into many windows, the formation of a non-fasting truss diagonals in the upper and lower horizontal surface paved walkway truss plates, rope hoist and electrical equipment installed operating agencies In bridge internal lighter weight, the overall stiffness, which is more widely used in China as a pattern. Ordinary bridge hoist mainly electric drive, usually in the driver room manipulation, there are remote controlled.  rope hoist  capacity of up to 500 tons, span up to 60 meters.

Manufacturing of electric chain hoist Features

Rope hoist manufacturing flexible, agile technology, and scale lean
In the fierce competitive market conditions, to improve the market share of lifting hoist, lifting hoist to ensure high-quality, high-performance, and continue to introduce new Wire rope hoist products, manufacturers must have the ability to adapt to market changes and rapid response capability. Including improving production efficiency, improve and maintain Wire rope hoist consistency of product quality, reduce production costs, shorten production cycle, accelerating  Wire rope hoist  upgrading of products and so on. Flexible manufacturing is to make the process equipment and process route can be applied to the production of various Wire rope hoist product needs, from single species to adapt to the current way to the mass production of many varieties of small batch production pattern. Agile manufacturing of  wire rope hoist  is to make products with reduced time to market for the shortest time to prepare, so that enterprises can flexibly steering mechanism. Lean manufacturing labor productivity is to continuously improve the production process and maintain Wire rope hoist stable product quality, emphasis on corporate departments cooperate closely. Good production mechanism and management mechanism is the prerequisite for the development of enterprises.
rope hoist manufactured widely used Computer Aided Process Planning (CAPP), computer-aided manufacturing (CAM) and flexible manufacturing system (FMS). Extrusion molding, press molding, precision casting, and a small, non-cutting process, cutting using optical tracking technology, welding robot technology. Make full use of automatic CNC machining centers and to improve the level of automation in manufacturing. The modern manufacturing methods is to maintain quality and stability, improve labor productivity of the premise.

Electric wire rope hoist wire rope sling than the other advantages of which

wire rope hoist rope is rolled high carbon steel wire as the main raw material deep processing chain hoist products, metallurgical industrial sector in our country belong to the scope of metal products. Its process is rolled high carbon steel wire to first create a wide variety of steel  Wire rope ，  wire rope and then by and some other materials (such as the rope core, steel grease, etc.) and structures made of different varieties of wire rope .  rope hoist  rope important position in the national economy, almost all industries and sectors are inseparable from it, especially in mining, metallurgy and petroleum, chemical, machinery, electricity, coal, telecommunications, aviation, maritime sub-aquatic, forestry, transportation , construction and other sectors more important role.

Ten classification wire rope hoist

1 mine with  Rope 
Mine coal or metal ores as well as personnel, materials and so rely on the rope, the rope so mine as an important key materials. And require high quality, wear resistance, corrosion resistance, fatigue resistance, run absolute security. Overall mining and management requirements of the rope is very strict. Due to the use of different occasions, requirements differ, for example: Incline requirements with rope wear resistance, generally use 6x7 ordinary wire rope, wire diameter of its thick, it is more resistant to wear; 6Tx7 + PC surface contact wire, as its structure is tight, few voids, large contact surface rigidity, resistance to wear and use both easily deformed, the domestic has some units.
2.  Wire rope  ropeway
Ropeway is mine and forest industries in the rugged mountains between the major means of transport. It is compared with other transport facilities have not occupy farmland, low investment, low energy consumption, etc., so that many regions are actively developed.
Cable wire rope is divided into:
Main cable ----- for track use, requiring good wear resistance, most adopt a more rigid seal rope.
----- For pulling cable bearer to use, requires a better fatigue resistance wire rope, wire rope most used line contact.
3. lift hoist  wire rope
General lifting wire rope hoist is required multilayer wound on the reel should have good bending fatigue performance, using the contact wire rope is more appropriate [eg 6F1 (25), 6F1 (29), 6X36SW etc.].
Laden soft rope and lifting required to facilitate the general use of point contact wire. If 6 * 19,6 x37b etc. structure. High-lift lifting machine for wire rope, wire rope rotation in order to prevent occurrence of wound phenomenon should not rotate rope. Such commonly used in the manufacture of wire rope inner and outer layers twisted in opposite directions, so inner and outer layers of the torsional moment cancel each other out. Current domestic production of non-rotating wire rope varieties multiple shares (18x7, 18x19, etc.) and four strand wire rope (4Vx39S, 4Vx48S etc.).
4. Fishing Rope
Saltwater fishing operations using wire rope hoist rope requires good corrosion resistance, flexural fatigue resistance and flexibility and so on. Specific uses include trawls, set nets, net volume of such surface of the wire rope are galvanized by hot dip galvanizing process (in order to improve its corrosion resistance indicators applied to obtain the vertical thickness of the zinc layer leads to France). As wire rope core (made of sisal and jute), easy absorption acid, alkali, water and other corrosive substances which cause corrosion and rust caused by the early inner wire broken wire, therefore, the country also began to make use of polypropylene rope core, poor absorption due to plastic core, which in itself is not corrosive, thereby extending the life of the rope. In recent years, the fishery abroad mostly used aluminum wire rope wire rope, because the surface can generate a robust alumina (A1203) film, good corrosion resistance, especially in marine and maritime climate is better than galvanized steel wire rope.
5. Shipping port facilities Rope
Such requirements rope abrasion, compression, fatigue, tension and large. Is mostly in the port machinery line contact wire, in a tower crane and tire wire rope hoist is also available on four strand wire rope and other varieties, the effect than ordinary rope is good. In engineering ship, usually because of the small pulley hoist, so it requires the use of a softer 6x24 class rope. For the application of salvage rope, required performance soft, easy strapping, able to withstand salvage objects out of the water when the instantaneous shock, so far, has been using point contact structure of galvanized steel wire rope, usually in the rope diameter 90 mm below the age of , using 6x37 structure than ∮ 90 毫米 rope diameter is used 8x37 and other structures.
6. Elevator Wire Rope
Elevator wire rope lifting primarily for manned and physical level only. As the city developed a large number of high-rise buildings, the elevator will be increasing demand for steel wire rope. Such rope requires compact, soft, small elongation, fatigue and high performance. For domestic elevator hoist chain hoist device characteristics, in order to reduce its pulley groove wear, generally use the tensile strength of the outer lower than the inner wire twisting different intensity, while the majority of the structure is now in line contact with stereotyped extravagant [s (19)] chain hoist products, can increase the area of   contact with the pulley rope, wire rope soft performance can be improved.
7. Oil drilling wire rope
Oil industry oil and gas corrosion resistant wire rope required, and high bending fatigue and high tensile strength, high length to accommodate deep requirements, etc., which most of the drilling string by using the line of contact wire rope [6 * 19S, 6 * 19W , 6FI (21) ...]
8. Aviation Wire Rope
9. Tape Rope
Belt conveyor is a new large-scale advanced vehicles, running speed, high transport efficiency, chain hoist equipment, light weight, you can move and stretch, suitable for continuous long-distance transportation, foreign and some distance belt conveyor transport up to 100 I km, a mining and railway stations, ports auto transport linkages between the key, tape, rope is the skeleton as a rubber conveyor belt material disposed in the middle of the sandwich in a rubber band, and close and rubber bonded together. This wire rope hoist rope require high strength, good flexibility, the need for galvanized surfaces, clean and free of grease, etc. do. Otherwise it will affect the binding strength and the rubber, the diameter of this wire in ∮ 3 ~ 11 mm.
10. Tire Wire Rope
Automobile tires are one of the important parts, with the rapid development of transport undertakings, in order to extend the life of tires, since the sixties successful trial of the world's industrialized countries in order to replace the original fine tire rope fiber material for tire reinforcement materials. This wire is also known as tire "steel cord." It is mainly used for "steel radial tire" ply carcass and a buffer. The wire rope hoist tire contact with the road as part of small slip and can avoid overheating caused by wear and tear, so this tire high mileage, but also fuel-efficient, so get a lot of recent developments. The high strength steel wire rope, specifications fine, good fatigue properties, the surface coated with copper-zinc alloy layer, with the rubber with strong, technical requirements are very stringent. Its structure is: passenger car tires as a * 5,1 * 4,2 +7 and so on. Truck tire 7 * 4,3 +8,3 +6 and so on. China is now the most used tire rope 1 * 3 * 3 +9 +9 structure, wire diameter 0.147 mm, from 39 filaments twisted together. Second, there is 1x3 +5 (l) 7,1 x7x7 other varieties.

The safe use of electric hoist tower

(A) the installation of tower  Wire rope hoist  should use a qualified qualified professional installation team, according to technical construction requirements and professional standards, and by the safety inspection department and then put into use.
(2) establish strict safety procedures and  Rope hoist  equipment maintenance system, drivers and maintenance personnel someone full-time, through professional and technical training certificates, to eliminate illegal operation and illegal command.
(3 lifting hoist should be selected according to the local weather conditions, construction season and working levels to choose different models.
(4) In the tower  Hoist equipment  arm side installation anemometer, when the wind speed exceeds 20m / s, should stop operating. Job site should be well lit, good line of sight, scene lighting power should be divided  lift hoist  power supply, the use of non-safety voltage lighting fixtures and power lines should be done with lift hoist insulate.
(5)  wire rope hoist  tower height on the basis of design freedom still continues to rise, should be added attachment devices, and appropriate use of load shedding. Field ground the power switch should be set to install leakage protection. Voltage fluctuations in a large area when used, should be retrofitted with undervoltage and overvoltage protection, undervoltage eliminate failures caused by electrically controlled movement disorder caused by the body, to ensure efficient and reliable operation of all safety devices.
(6) is strictly prohibited in the tower hoist side of the frame body placards put up a large area to reduce the wind load. Counterweight machine with weights according to the technical requirements set fixed and reliable connection.

Internal combustion rail lifting hoist routine maintenance

1 Check Rope hoist  engine diesel tank storage capacity, the oil sump height, the water level in the tank, hydraulic tank storage capacity, the amount of torque converter oil storage tank, air compressor oil level, heater tank oil reserves, etc., should be found to fill the oil shortage.
2 Check the battery voltage electric hoist or electrolyte specific gravity hydrometer measurement. Voltage is lower than 1.9V and electrolyte specific gravity less than 1.27 when (winter should be 1.28 to 1.30) to be charged. Meanwhile electrolyte should be higher than the electrode plate 10mm ~ 15mm, distilled water shortage should bear.

3 Check the engine, air compressor and the gearbox mounting bolts are secure and reliable, the cotter pin, ring, etc. is good; triangle belt tension level in 10 ~ 20mm is appropriate.
4 Check the pressure oiling oiling and lubricating parts of the state, to keep the area clean and lubricating grease.
5 Check steering handle manipulation stage role is normal. The role of instrumentation and gauges and displays are normal.
6 Check the connecting pipe joints for leaks, oil and wind, found no adverse premises timely manner.
7 Check the interior and exterior lights, marker lights, instrument lights and other effects are good, the electrical connector contact is good, wires for damage.
8 Check whether there is broken  Wire rope  surface and damage and so on.
9 Open the stop valve water separator discharge sewage.
10 engines, air compressors and heaters and other routine maintenance in accordance with the instructions provided by the manufacturer of the relevant regulations.
11  wire rope hoist  the boot once per shift for air operation, check the functioning of the working mechanism and the brake, clutch and so is reliable. Not less than 30min.
12 clean cab, machinery indoor dirt to keep clean.

Electric hoist brakes work does not allow reverse

wire rope hoist body is heavy, a lot of inertia at run time, and the normal operation of rope hoist brakes immediately when inverted, will make the entire run organization with great torque, to the detriment transmission. Severe broken drive shaft, also make the body skew distortion; reverse brakes also make the gear linkage system occurred violent impact, damage gear, causing the  Rope hoist  equipment accidents; reverse brakes also make electric power machine with great torque and strong currents, severe motor will burn out.
wire rope hoist brakes also make the air inversion occurs hanging objects swing hanging objects caused by falling. So, at work, in addition to the event in order to avoid the special danger of an accident outside, does not allow reverse brakes.

Hoist single, twin-engine comparison

Now on the market for the car using an engine hoist (abbreviated single) or lifting operations and driving each with an engine which uses twin-engine (referred twin), whichever is the higher the lower is the public that goes, both said claim to be right, then the fact that in the end how  Single or double, and ultimately from the user's point of view should be taken into account. Only from the overall thinking ability for users to create  wire rope hoist  products and processes to maximize efficiency in the use of use of the lowest cost, is the best choice answers.

Utilization from the engine, the twin-engine single-engine than there was a marked difference in their walk with the engine off only a single engine  lift hoist  quarter of the number of hours worked. From the investment efficiency considerations, the utilization of funds has not been fully realized.
From thewire rope hoist products in terms of performance and reliability for a certain vehicle curb weight, the weight utilization (curb weight with body mass ratio) should also be an indicator to measure lifting capacity. The  lift hoist  3 meters from the weight of a certain magnitude, the increase in the load of the counterweight greater, wherein the stability of the long arm of the better working conditions, the corresponding starting weight is greater. Conversely, the lifting capacity is constant, the lighter the vehicle curb weight, the user cost of the purchase cost and the use of the less (author believes Liebherr companies in this regard is more successful typical). The function of the system to meet the requirements of the premise, the system more simple structure, its reliability is higher.
In recent years, electronically controlled injection technology for diesel engines with a range of new technologies, including increasing high-pressure injection, turbocharger with a control valve, four-valve technology, electronically controlled fuel injection technology, emission control technology, can reduce the amount of fuel injected nearly 20%, increase engine power of 5% to 7% reduction in fuel consumption of 3%, and reduce engine noise 3 db, driving engine emissions to meet Euro Ⅲ emission standards, or even able to meet future more stringent emission standards.

The main point is that the engine ECU (electronic control unit) can be  Rope hoist  vehicles actual working conditions, formulate corresponding output power curve (ie dual engine power curve). While driving the engine at maximum power mode output power, and in the lifting operation mode output power when using PTO, the engine operates at the set interval, including the minimum, maximum speed, rated power, torque, etc. comprehensive driver's wishes and feedback load size, amount of the electronic control fuel injection system, eliminating the operator's operation anomaly, the engine is always efficient and economic operation of the work area, so as to achieve maximum fuel efficiency and reduce operating costs.

Lifting chain of several major classification

Category
load chain according to different uses and functions are divided into transmission chains, conveyor chains, special chains and special traction chain of four.
1.1 drive chain is mainly used for power transmission chain.
1.2 conveyor chain is mainly used for transport of materials.
1.3 traction chain is mainly used Laye and lifting chain.
1.4 for the special chain is mainly used for special Hoist equipment and apparatus, with a special function and structure of the chain.
Structure Series
In similar products, according to the basic structure composed of  load chain ,  that are based on element shape, meshing with the chain of parts and parts, spare parts, etc. size ratio between the division belongs chain products.
Breed
Chain of the same series of products, according to the chain components and the materials, chain and hinged attachment structure is divided varieties.
Specification
Chain of the same species by pitch, Rows, ultimate tensile load chain width and the different divisions specifications.

Electric hoist how to ensure safe operation

  Wire rope hoist  hanging objects running in conditions permitting, the best hanging around 0.5m from the ground by rigger behind the hoist hanging objects help steady object and under the command of the rigger run around obstacles. Do not run electric hoist intermittent, long-distance running, it is best to send electricity long run as well. Electric hoist hanging objects should be to ensure the smooth running, electric hoist if hanging objects swing or jitter, should be running side edges steady running hook, not let it shake or swing.

 Electric hoist hanging objects from the car and run when improper methods.  wire rope hoist  then make hanging objects swing accidents. Electric hoist lifting hanging objects, when the  wire rope  or  load chain  tension should be parking, electric hoist according to the direction of the hook again to identify the hook shake while lifting workers should check whether hanging objects hanging in prison; electric hoist lifting is not too Meng, hanging objects from the obstacle when accelerating until after lifting speed;  rope hoist  lifting height of hanging objects easily big thing generally exceed maximum safe passage 0.5m as well.

Continue to progress the strong electric hoist

Among the engineering machinery industry,  rope hoist  to play an increasing role, accounting for  hoist equipment  industry which the proportion of about 35%, with the electric hoist industry in the growing role of the domestic arena, it will in the future market competition among shine, to show corporate self-advantage.
Overall growth in the crane market, while there are only able to establish focal points play a market advantage. Stage the market is still dominated lifting hoist products to large tonnage  lift hoist  for scientific research orientation. Vigorously lifting machinery professional manufacturer for all kinds of electric hoist products to increase research and development efforts to develop large-tonnage, high-precision lifting hoist to large tonnage and advanced technology for the market-oriented, technology-hing plant market walking roadmap . Although  Rope hoist  already on the market has formed a certain scale, but for the achievements at this stage we are still not satisfied, we will place a greater effort to plunge into the large tonnage, new technology research and development of electric hoist them.

According to China's machinery industry in the first half for the survey electric hoist,  wire rope hoist  current domestic economy maintained a steady growth in its sales continue to grow, but its sales and profit growth continued to slow down the trend appeared. Overall, the current domestic market, the overall trend hoist is still good.
After making the National Machinery Industry Federation expects industry sales will grow by about 20%, the industry will also appear small floating interest rates rise.
According to relevant statistics show that this year, China's  Hoist equipment  ndustry were completed industrial output value and sales value of 6% and 4.2% year on year growth in industrial added value increased by 5.7%, higher than the same period in other years industrial growth 1.9 percentage points. Meanwhile hoist main business revenue interest rates somewhat abject, chasing the main reason lies in the material of steel material prices and increasing the degree of competition in the market, leading to a decline in the main business interest.
In addition, the first half of this year, exports of electric hoist continues to grow significantly, for nation-building and the increase in import and export trade has provided a guarantee.