Lever hoist is a kind of hoisting wire rope drawing tools

Lever hoist is a kind of hoisting wire rope drawing tools, when working by hand pull (handle, alternative action by rocker, connecting rod in the clamping mechanism, driving load forward or backward. Because there is no brake lever hoist wire rope, so the chainb lock mechanism is grasping mechanism brake mechanism, is the key to this kind of product. Design lever hoist wire rope, the main problem is the design of clamping mechanism is calculated. Since there is no uniform design specification, we are updated according to many years of three generations of the product design, test and production experience, the design and calculation method of the following are put forward. These data and the method also can be used for reference in the other wire rope in the design of clamping mechanism. Clamp, the size of the clamping plate of the basic calculation of the clamping lever hoist mechanism by the clamp, the clamping plate and pin shaft and the clamping plate links together the side panel, etc. Bridges, buildings and pipelines male door USES, such as zero pull wire rope hoist and the dove was buried a butterfly wing, products, drop a kwai column fresh technology hoist equipment refers to the atmosphere, the reliability index are mechanical efficiency index. But in the past for this product cheeper guan xing code stool mantra against atmosphere xin xin wing code is actually is, handsome model calculation rate value is high. With a rose the silting Lin Xiong, loss of greater than kang wipe clamp body parts of crank rocker articulated order also has two ways: type NHss wire rope lever hoist is brought type, Hs yao products for fork type switch (pick and hinged points). Different hinge order affects only Fried, chu clamp body parts alternately in order. Transmission series and clamp body parts are articulated order does not affect the mechanical efficiency calculation method proposed in this paper is practical, so type NHss single-stage waste shu transmission structure, using a vertical hanging, lifting load Q is working as an example, discuss the Zha calculate mechanical efficiency. According to figure 1 shows that human pull (forward in hand back and forth on the casing, the crank rocker rotary oscillation and auxiliary into work. With the aid of leverage, and alternating and direct money traction load direction, as a work of algal especially '~ to clamp of load"

The shortcomings of the old control mode

The shortcomings of the old control hoist crane is compact, lightweight, easy operation, low cost, wide range of USES. It with a conical rat cage motor as an ascending motor and the car running, cart is usually with squirrel cage motor drive. Hoist crane, there are some inevitable shortcomings, such as the large starting current, the braking impact big, easy create frame and the shaking and the deflection of the cargo; Point move too much, motor overheating, easy to cause broken shaft, motor, reducer and wear accidents burn out. So looking for a good starting and manual hoist control method is very meaningful. Hoist crane all faults are from cage motor control method, because it is direct starting, the starting current is rated current of the 5 ~ 7 times, reverse braking cannot overcome reducer gear clearance between the impact of. For big inertial system, the organization in the process of starting motor under maximum load and maximum torque is chainb lock proportional to the clearance between teeth and gear reducer. At present, the hoist crane often operation, with a push button switch point moving frequently, the motor easy to fever. To make up for the defects, and expand the motor capacity is often used to choose the way. Thus increase the supporting capacity of the motor, at the same time, in order to avoid the broken shaft and broken teeth, and increase the capacity of the gear reducer. From the point of the model characteristics of conventional control, old-fashioned control mode is stumping while saving money, but later use performance is poor, large energy consumption.

Wire rope effect

Overview of henan coalification coal company manual hoist crane in order to reduce the well the worker in the upper and lower labor intensity of the well on the way, in 1992 and 2002, respectively, at one level and two level, between two and three levels of each set up a length of 500 m trolley car. Aerial mancar since the equipment running well since it was put into operation, drastically reduce the labor intensity of underground staff's work. However, aerial hoist equipment short service life of wire rope has been plagued our technical problems, the longest service life of wire rope for five months, the shortest is only 45 days. The reason is caused by fatigue broken wires transfinite (" coal mine safety regulations "regulation: broken wires in one lay length reaches 25% of the total number of wire must be replaced. I mine trolley car wire rope specifications for: 6 x 19-21.5 - ZZ - 1670, namely the broken wires in one lay length to 28) must be replaced when. The value of a wire rope is 17000 yuan, need at least four small class to complete 12 employees to work hard. Frequent replacement of wire rope not only affect the normal downhole worker ChengZuoRen car, but also to spend a lot of unnecessary manpower and material resources. In order to solve this problem, we return to the operational status of vehicle equipment and comprehensive study and analysis of aerial mancar wire rope for the stress analysis and selection.

Wire rope electric hoist can be used for hoisting equipment alone

Wire rope electric hoist can be used for hoisting equipment alone, equipped with their own car after also can be used for overhead monorail crane, etc, is a kind of compact structure, light weight, high efficiency and convenient operation of the lifting equipment. chainb lock to the building height, such as rail type is divided into 14 types. Code types of HSG standard building height, linear rail, rigid connection table code class type of hand trolley type HSJ standard building height, type curve track, hand trolley type HLG hinged connection standard hoist equipment height, linear rail, rigid connection of sprocket trolley type HLJ standard building height, the curve of orbit, hinged connection of sprocket car type HDG high standard construction, hoisting machinery products type general type of class, group, and the main number code in two parts (FIG. 1-1-2). Figure 1-1-2 type crane product model class, group, said Chinese phonetic alphabet in capital letters. Class, group, the type of code are shown in table 1-1-1. Main parameters are expressed with Arabic numerals. When the product be replaced or structure of A major reform, need to test for identification, its improved code according to the capital of Chinese phonetic alphabet A, B, C, D... Models the tail order, in the original ones. Example: QD20/5 bridge crane, said hook bridge crane, the main hook 20 t, 5 t vice hook.

Chain lever hoist is a kind of small manual lifting machinery

Chain lever hoist is a kind of small manual lifting machinery, has a compact structure, simple operation, light and energy saving, easy to carry, etc. manual hoist with the chain, more suitable for small workplaces, and aerial work, field operation, and can be used in all kinds of Angle of traction and bundled items. So chain lever hoist is widely applied in the shipyard hull hoist equipment welding of high voltage transmission lines of electricity department joint taut, agriculture, forestry and transportation of lifting loading, fastening, vehicle traction and factories, mines, construction and other departments of equipment installation calibration, hoisting, part drawing, etc. (see photo). The shipyard hull assembly welding job, as a result of chain lever hoist, can realize rapid and accurate ship registration, not only improve the size precision of the hull and the labor productivity, and improve the quality of the surface of the hull of the ship. Chain lever. Reed easy to carry. In a narrow place high or operations and also very convenient. Its net weight only 1. 6 kg, the minimum distance between hook is 205 mm. Because of using the K (0 unique clutch device, can quickly adjust to the work required to lift. Through the research and development of K (0, chain strength to IOOONlmmZ, become the world's highest level of nickel plated chain. It is not only strong, its corrosion resistance, wear resistance is high.

Heavy equipment manufacturing quality management status

Lifting equipment manufacturing quality management status quo of the crane has been widely used in petrochemical industry, port, shipbuilding, power plant, machinery, metallurgy, construction and other fields, is an important chainb lock of various industries to realize mechanization, automation. With the development of the society, it has extended to elevators, escalators, three-dimensional garage, cable car and amusement, etc, is closely connected with People's Daily life. Lifting hoist equipment as special equipment in China, the exercise of administrative supervision to its security. Design and manufacture of installation shall be implemented in the operation permit system, new or used after a certain period, mandatory safety inspection, issue the use license. At the same time, through implementing a series of laws and regulations, standards, procedures and for design and manufacture, installation, security inspection behavior norms, hoisting equipment, the quality of management has improved. But most lifting equipment manufacture, installation quality in our country is still controlled by the manufacture, installation units themselves, part to supervision by the owner or various forms of administrative management, entrust a third party professional supervision unit process supervision and management of less than thirty percent. Afterwards supervision and supervision of market reaction of all sorts of quality problem and the impact of different. 1. Afterwards supervision concerns with mandatory safety testing is belongs to the final part of the quality inspection, hidden for a variety of quality problems are found and the resulting accident, property damage, casualties or cause disputes and resort to law.

Electric hoist can be used alone

Lever hoist wire rope has three big functions, lifting, tension, traction rope lever tractor specification 0.8 tons, 1.6 tons, 1.6 tons, 5.4 tons. Especially suitable for no power supply condition to use. Wire rope lever tractor when using do not overload operation, once the overload safety pin automatically cut off, please make sure safety pin and then to work after the replacement. Please in strict accordance with the instructions for operation. High work manual hoist basket dedicated lever hoist by HSS - 1.6 T lever hoist, SLS3.0 safety lock, steel hanging basket and suspension mechanism of four divisions. Conform to the compulsory standards issued by the ministry of construction design standards. JGJ59-99 "building construction safety inspection standards" GB19155-2003 "high work hanging basket Q / 12 nj - 2002" the special lever hoist construction chainb lock basket "(business standard) manual high work hanging basket by domestic and foreign advanced technology, reasonable structure, compared with other institutions of hanging basket has erection convenient, simple operation, safe and reliable, the various specifications, saving investment, high efficiency, etc. In the country is the most ideal high homework today, the most advanced and safe operating tools.

Lever lever hoist wire rope and wire rope tractor

Lever lever hoist wire rope and wire rope tractor, wire rope tractor. Is a new type, efficient, safe, durable hoisting machinery products, has three big functions, lifting, pulling, tensioning machine structure design is reasonable, the safety coefficient is high, service life is long, especially suitable for field without power supply condition. Imported chainb lock rope hand hoist main brand TOYO (Japan), the VITAL (d), impression, such as Yale, black bears, jin leopard, rated lifting weight is 800 kg, 1600 kg, 3200 kg, 3200 kg can pull 5 tons. Use the winch wire rope traction harvesters or other containers, running on the track or trackless homework mine transportation mode, including a rope, endless rope, monorail crane and scraper transport, etc. Twist wire rope steel wire for high quality carbon structural steel and alloy steel, 0.4 mm to 4 mm in diameter, and tensile strength of 1400 mpa to 2000 mpa. Rope is hoist equipment fiber, hemp core storage and "pad" role, so that the wire rope with softness, absorption in the tension of wire rope and the contact pressure at the same time, also can sufficiently oily, make the wire rope in use for a long time to get necessary well lubricated.

Chain as the upgrade version of the crown block

Chain as the upgrade version of the crown chainb lock, fully inherited the merits of the crown block, at the same time, a reverse non-return brake speed reducer and the combination of the chain pulley block, symmetry secondary spur gear rotational structure, simple, durable and efficient.Chain generally adopts chip hoist equipment ratchet friction brake, can self braking under load, ratchet in under the action of the spring and ratchet gearing, the brake safety work.

Machinery widely to many fields of national economy

Since 60 s of loader in China research and trial production after engineering and technical personnel nearly 40 years of manual hoist work, explore innovation, finally have our own technology, fine product specifications variety of loader series products. This machine is widely in many fields of national economy, promote the development of the national construction. The classification of the loader, loader shovel to dig or loading and unloading material is through the movement of the working device. Bucket rod and the rocker arm and bucket cylinder hinged, used to load and unload hoist equipment. Movable arm with frame, movable arm cylinder hinged, used to hoist bucket. The flip bucket and movable arm lifting adopts hydraulic control. Loader job working device should be able to guarantee: when turning cylinder are blocking, movable arm oil cylinder lifting or landing.

Mechanical type

Mechanical shovel has taiyuan mine machinery, chainb lock weighing, digging, etc. Small and medium-sized excavators more for diesel, hydraulic backhoe, domestic manufacturers heavier. Tower crane mast crane crane

Loader is a kind of widely used in highway, railway, building, water and electricity,hoist equipment, mining and other construction conditions of the machine, it is mainly used to shovel, sandstone, lime soil, coal and other material, can also be used for ore, hard soil, such as mild shovel dug homework.

Use the winch wire rope traction harvesters or other container

Use the winch wire rope traction harvesters or other containers, running on the track or trackless homework mine transportation mode, including a rope, endless rope, monorail crane and scraperhoist equipment, etc. Have a rope haulage with winding winch, one end of the wire rope winding on the winch drum, the other end on the car, when drum rotation, traction harvesters. Lever hoist is a simple to use, easy to carry the manual lifting tool. It can be upgraded, traction, drop, calibration etc. The weight is generally not more than 50 t widely used in shipbuilding, electric power, transportation, construction, manual hoist, post and telecommunications departments such as equipment installation, lifting, pull the parts, etc.

Use the winch wire rope traction harvesters or other container

Use the winch wire rope traction harvesters or other containers, running on the track or trackless homework mine transportation mode, including a rope, endless rope, monorail crane and scraperhoist equipment, etc. Have a rope haulage with winding winch, one end of the wire rope winding on the winch drum, the other end on the car, when drum rotation, traction harvesters. Lever hoist is a simple to use, easy to carry the manual lifting tool. It can be upgraded, traction, drop, calibration etc. The weight is generally not more than 50 t widely used in shipbuilding, electric power, transportation, construction, manual hoist, post and telecommunications departments such as equipment installation, lifting, pull the parts, etc.

Crane trolley and hoist trolley What is the difference

General double beam crane trolley are made motor, reducer, brakes, drum, wire rope, hook, overload limiter and stroke limiter to form a lifting system, electric hoist sucked these electric riding pallet jack integrated power system together. In fact, the principle is still the same machine, the main difference is that the former are generally self-erecting crane manufacturer of the latter being outsourced. The former give buyers the right to choose the manufacturer and the latter more generally have only a fixed number of models to choose from. Another is the difference counter balance stackers between the car run institutions, this is not to say clearly, is the difference between structural parts.

How explosion proof electric hoist

Explosion-proof electric wire rope hoist  electric hoist is more common but a rather special, mainly reflected in the "explosion" word, and from this we can see the word on the product's main performance, we described in detail below is proof electric hoist electric control system.

Explosion-proof electric hoist electric control system consists of explosion-proof hoist boxes, explosion-proof button control box, explosion off the fire limiter components. Explosion-proof electrical equipment enclosure closed securely  Explosion levels to meet the appropriate requirements of its internal functions and ordinary hoist electrical installations basically the same. Explosion-proof hoist box internal electrical components are of high quality, reliability and long life of Siemens low-voltage electrical components to minimize the explosion due to an electrical fault caused the number of boxes out of the box.manual hoist In addition to the control box to run the opposite direction contactors with electrical interlocking between the outer  button button control box is also provided with a mechanical interlock between avoid misuse caused by short circuit happening. Control button box with a fine wire hanging in the explosion-proof hoist box about 1.5m from the ground under high position in order to facilitate personnel. Reset button box with a rotary-type mushroom head type emergency stop switch in case of emergency to facilitate fast the motor is stopped. Button on the control box using the arrow mark internationally accepted symbols and safety AC 36V control voltage. Limiter off the fire-proof control box by the limiter and external guide rods. Wire rope on the drum Fairlead card board push rod limiter control box and then trigger action to cut off contacts Lifting motor power.hoist and trolley By adjusting the position of the guide rod can be set to hit the block hoist upper and lower limit position but must ensure that the hook reaches the lower limit bit  wire rope on the drum 2 laps still left margin (excluding the rope under pressure lap ).

How to Install group hanging electric hoist?

Group hanging electric hoist can be used alone or with multiple synchronous lifting,hoist equipment use the control cabinet unified control, mainly due to the large oil tank welding in areas such as the following for you to explain, group hanging electric hoist how to install?

The first step is to open the container. Before installing the test machine, connect a wire rope drum wrapped in paper tape opened, scored before the test machine, test machine if you hurry, you may cause damaged rope rewind and stop frame. After this step, we need to note is to avoid direct contact with the wire rope and stop frame, otherwise easily lead limit switch failure, causing mini electric hoist is not working properly. The third step is to use the group hanging electric hoist when the body can not move or rotate along the mounting rod.
Then, to observe it, the work group hanging electric hoist the standard single-phase power supply is not running account,wire rope winch and you must use an outlet with a ground wire. If the state does not drop in electric hoist, electric hoist drum is coated with red paint in the last three laps rope can not be released. If continue down switch, wire rope on the rope drum will be rewound to make electric hoist operation upside down on the open, so that the limit switch will lose effect.
Finally look precautions, such as not to allow group hanging electric  lift hoist  to be exposed to rain or soaked in water, make sure that all cables hanging electric hoist with the group on rotating or hot parts to maintain an appropriate distance.

Electric chain hoist cycles common sense protection

Any product has a protective cycle, electric hoist is no exception, if you can master the hoist protection period, hoist and trolley it will bring you great benefits, eliminating unnecessary overhead electric chain hoist purchase.
1 electric hoist in the design protection period, the surface does not exceed the ISO4628-3 rust rust grades in Ri3 level (equivalent to ASTMD610 of six or European standards Re3 grade)
2, A3.08, A3.11, A4.14, A4.15, etc. are ISO12944-5.
3, electric hoist the main consideration gloss finish selection and color retention, 4 files, PU412 aromatic polyurethane topcoat, PU413 aliphatic polyurethane topcoat, PU421 polyurethane topcoat electric hoist machinery, PU420 polyurethane engineering automotive finish.
4, no zinc primer (EPMisc.) consideration was mainly rust resistance and high solids, one can achieve a dry film thickness of 80 microns, optional epoxy zinc phosphate primer,wire rope winch epoxy bottom aluminum tripolyphosphate paint.
5, zinc-rich primer required dry film (or non-volatile parts of) zinc content (not the metal zinc content) ≥ 80%. Such as the use of the level GB_T_6890-2000 zinc (metallic zinc content ≥ 96%), the dry film can be converted into (or non-volatile parts of) zinc content (not the metal zinc content) ≥ 76.80%. Can also be taken as inorganic zinc (zinc silicate) primer.
6, the most commonly used in the paint is epoxy painted iron, because iron thin cloud is not high,manual block such as requiring a good surface appearance, good fineness can be replaced by an epoxy.

Electric chain hoist prices of different factors

With economic development, all kinds of raw material prices continue to rise, affecting electric  chain block  for the price factor is also increasing, which leads to hoist prices continue to emerge in recent years, large or small growth. Then the impact of electric chain hoist prices which different factors, the following details for you:
1 electric hoist production materials rose, with the international market in which steel prices continue to rise, led directly to the electric chain hoist production materials rose, thereby causing electric chain hoist price increase.
2, the continuous upgrading of production equipment, the development of technology, new products, new technologies, in order not to fall by the times, and constantly improve their own strength, and make great efforts to participate in the new electric  manual hoist  in the development and production of which, thereby increasing the cost of production inputs, which is electric chain hoist prices is an important factor.
3, the continuous service quality win customers for products and manufacturers have become increasingly demanding, how to be able to seize the customer psychology and win market demand, high-quality after-sales service is essential, and the improvement of quality of service , but also directly affects the various expenditure increases, tolls, which will increase the cost of maintenance.
4, continued intense competition in the market, because the market in which electric  lift hoist  manufacturers continue to increase, the quality and price to win market demand, to a certain extent, also the electric hoist shown a significant increase in prices.

Electric hoist control box working conditions

Electric  rope hoist  in the control box by the cabinet, contactors, transformers and other components, according to user requests for different lengths of multi-conductor cables and flashlight door, each control box is equipped with electrical schematics, wiring terminals are consistent with the schematic clear numbers, user maintenance, wiring. The following detailed description of your electric hoist control box working conditions.

1 control box use less than altitude does not exceed 2,500 meters,
(2) the ambient air temperature is between -20 ℃ ~ +40 ℃.
3 air humidity of 90%,chain block while the monthly average minimum temperature is 25 ℃, and taking into account temperature changes on the surface of the product Cream;
4 workplaces should have no violent shaking and vibrations;
5 In the absence of explosive medium, the medium does not corrode metal and damage the insulation of gas and dust (including conductive dust);
6 In the absence of rain and snow (rain,load chain except the control box).

Humid environment for the special requirements of the hoist

Under normal circumstances hoist Working environment humidity less than 85%, electric hoist protection class IP44,manual block but with the humidity required to adapt more and more occasions, for more than 85% in the wet conditions, the hoist to some special requirements.

In nuclear power plants, nuclear equipment and other high-pressure water washing areas are at 100% humidity,wire rope winch which requires the hoist protection must be increased, therefore, the humidity is greater than 85% to 100% of the use of the environment, the hoist motor and electrical protection class shall be IP55. Besides in a humid environment, the motor should be taken for more than 10kw additional preheating drying device before use.hoist equipment If operating in the open, the hoist should be created on the electrical motor hard rain cover.

Classification of wire rope hoist

Hoist  wire rope hoist  is the most frequently used tools in one field of use is also very widely, depending on the different requirements of different areas of the wire rope hoist, here to introduce you to the different areas of the classification under the wire rope hoist.
1, a wire rope hoist marine metallurgy, metallurgy working environment temperature is high, the use of a normal CD rope  lever hoist  operation not allowed.
2, dust-laden gas explosion sites, the environmental requirements for hoist safety factor is higher, you must use explosion-proof electric hoist, the product itself has explosion-proof function, use the site to choose explosion proof electric hoist grade for three or four.
3, building small, space-constrained spaces, under normal circumstances larger ordinary electric hoist,hoist equipment hoist the overall shape is oblong, larger space, the best choice for the space first place low headroom electric hoist, this section electric hoist for the square, gourd compact, taking up less space.

Factors affecting the quality of lifting chain

Lifting  hoist equipment  as an important accessory, chain hoist mass relation to the overall usage of the following lifting chain to introduce you to influence what factors?
1, lifting chain is divided into 80, 100, etc., the higher the level, the chain is relatively good quality
2, the same series of chain products, components and the materials according to the chain, the chain and the hinge attachment structure is divided varieties.
3, the chain selection of alloy steel, hardness, durability, safety coefficient is high, cast iron alloy is relatively poor quality.
4, lifting chain welding standards, purchase, pay attention to whether it is hand-welded chain, if the manual welding,load chain resistance to pressure the chain can not reach higher standards.
5, chain and monocyclic permanent elongation shall not exceed 5% of the original length
6, hanging chain permissible wear value must not exceed ring chain bar diameter or thickness of 10% of the aids.
7, the same species, according to the chain pitch, Rows,hoist and trolley ultimate tensile load chain width and the different divisions specifications.
Lifting chain in the field of lifting machinery is widely used as an accessory, I hope this article can help buyers identify the quality chain.

Electric wire rope hoist brake type

Under normal circumstances the hoist hoist brake mounted on the high speed shaft, and some brake is mounted on the low speed shaft or hoist drum, and its role is to prevent items falling off the shaft,hoist and trolley you can increase security, belonging to hoist the the mounting device is an integral part of the hoist, wire rope electric hoist in the following example, to introduce you to the type of brake.
Electric wire rope hoists are many types of brakes, the choice of a variety of factors need to be considered, because of the different use of the environment determines the electric hoist can adapt to the various components, can be used normally. If you choose incorrectly,manual hoist ranging from damage hoist machine, it caused heavy accidents.
Brake type selection, mainly based electric hoist standard requirements and the actual needs, determine the type of brake. Such as standards: hoisting mechanism, luffing mechanism must be set normally closed brake, walking or turning mechanism can be used normally closed brake.
Consider using environment and places, such as brake mounting there is enough space, the choice of block, arm band brake or disc brake,load chain space is limited value, can be used within the shoe or clamp disc brakes.

Prevent rusting hoist effective method

    Electric  rope hoist  after all metal products, daily use and improper maintenance are particularly vulnerable to rust, rusty after hoist between the various components will affect the gear meshing, resulting in intense friction, thus affecting the hoist use the following to introduce you to prevent electric hoist the most common and effective method of rust.
       1, the exposed surface of the hoist and exposed threaded surface, etc., should apply anti-rust grease.
       2, electric hoist gearbox parts should be coated with anti-rust oil barium sulfonate grease, inspect conditions and corrosion protection film is complete.
       3, the hook bearing, rust grease to be injected.
       4, if the wire rope electric  hoist equipment, wire rope should be coated surface rust lubricant.
       These are the most commonly used electric hoist everyday ways to prevent rust, in addition, if the hoist has rusted parts, we can first scrape off the rust with hardwood chip re-oiled, such as the film is damaged or deteriorated, application kerosene or gasoline to clean, apply a rust grease. To remind you if you do not use the hoist case,wire rope winch hoist chain or rope part should tarpaulin or plastic film wrap for protection.

Electric chain hoist normal voltage

    Electric chain hoist is the most commonly used  hoist equipment, powered by electricity during use, the following detailed explanation of your normal use of electric chain hoist voltage, want to use your help.
         Electric chain hoist into the normal operating voltage supply voltage rated voltage and operating handle. Rated supply voltage range of AC 220 volts to 660 volts, nominal frequency, there are two,wire rope winch namely, 50 and 60Hz, electric chain hoist in use, the use of premises voltage can fluctuate slightly, but the fluctuation range should not exceed the rated 10% of the voltage.
         Electric chain hoist operating handle voltage of 24V-36V, which is the AQSIQ mandatory requirements for special lifting equipment, low voltage can effectively protect users to protect against electric shock.
         As lifting equipment and electric products,manual hoist electric hoist safety-critical use, read the instructions carefully before use and precautions.

Explosion-proof electric hoist qualified indicators

  Electric  rope hoist  factory undergoes rigorous inspection and testing work, especially with the explosion-proof function lifting equipment, then the proof electric hoist achieve what criteria to be qualified products? The following introduces you to:
       First check the temperature insulation resistance greater than 1.5MΩ, ensuring no leakage gear parts, electric hoist operation when the noise should be less than 85 db.
       Second, we must test for detecting whether proof  lever hoist  qualified, ①, dynamic load test: 1.25 times rated load five times repeatedly lift, air start at least three times, the trip less than 2m. ②, brake down test, according to the national standard lifting speed brake slipped less than 1%. If there is a second brake, the second brake support to be tested load capacity. ③, electric hoist motor inlet voltage adjusted to 85% of rated voltage for load test. ④, blood pressure tests.
       Finally, there is the appearance of proof  wire rope hoist  qualified testing with paint must be uniform, bright, consistent color, paint adhesion grid method to meet the inspection requirements.

Electric hoist double girder crane state of health after use

    Electric wire rope hoist double girder crane lifting equipment as a large part of all aspects of the strict requirements, but in daily use after you noticed any abnormal mechanical condition, careful attention to observe order to ensure that electric hoist double girder crane life and maintenance of the following to introduce you to hoist double girder crane after use health status should be what?
         (1) electric hoist double girder crane rope after use should be no breakage, thinning, core prolapse,lever hoist twisting and other conditions occur;
         (2) machinery after use with rope fixed to the clamp, plate, wedge block should not be loose, not less than the number of clamps 3, the number plate is not less than 2;
         (3) electric hoist double girder crane after the opening of the increase in the use of the original openings no greater than 15 per cent of twisting deformation of the situation can not be larger than the original ten percent;
         (4) and brake drum after use should be no cracks, loose condition, reel wall thickness of more than eighty percent of the original;chain block brake band thickness as the original more than 50 percent;
         (5) electric  rope hoist  double girder crane safety in the use of the volume should be more than two weeks later, the balance wheel is not loose.

Regulate the use of sling

Here to talk about lifting belt when used for specification:
       Before each use, should be carefully examined for the lifting belt, its edges, soft loop and end pieces are damaged,wire rope winch as well as surfaces for vertical and horizontal cuts or abrasions, and lifting with good confirmation before they can be transported without damage.
       Use lifting with lifting objects to strictly abide by lifting coefficient table for proper operation mode can not be used without centralized protection Choked lift mode, you can not tie a knot or twist of the state to fight lifting goods, and more can not tie a knot way to connect or take a long sling. To prevent heavy lifting with long hanging in the lifting process, should avoid being caught by other objects or by other impact loads,manual hoist while avoiding contact with acid and alkali chemicals, high temperature or a Mars splashes try not to use sling lifting.
       Apart from the above, or if the loading zone in acidic alkaline environment before, immediately after use with plenty of cool water. When not in use to strap on a dedicated storage place should be avoided on the fire, open flames or other heat sources near the job,lever hoist lifting belt is not long sun exposure.

Climbing frame hoist the current market situation

  With the country on the micro economy turned on fortifications built slowed down the completion of all the original program names emerged early scene, while those who went the first three quarters,wire rope hoist climbing frame hoist sale rapids increased market situation has also emerged.
       Three quarters of 2011, their total sales climbing frame hoist 300 million units, an increase of 10.57%. Within the first quarter, sold 680,000 units, an increase of 42.90%; sold 890,000 units in the second quarter, down 2.29%; certainly have emerged in the third quarter,hoist and trolley the level of bounce, the cumulative sold 1.47 million units, down 10.45%.
       Climbing frame hoist which is occupied by relative market disadvantage, the market share of the enterprise skewed further to the handlebar, according to the manufacturer's main focus as well as by the level, with the crane's future has been stagnant, will gradually change the leader among the lifting career .
       After climbing frame on the front of the comprehensive market hoist, electric hoist climbing frame fortifications are being attack the market changes, the proliferation of business start climbing frame hoist care market,chain block because as the economy has been stagnant said, lifting the market will gradually recover .

Explosion-proof electric hoist six trials

   In order to ensure the safe use of explosion-proof electric  rope hoist, electric hoist in the factory have to go through the following six tests.
Type test: in accordance with the design requirements of a manufacturing explosion-proof electric hoist tests conducted to test this design meets certain specifications.
Conventional test: also called factory test, explosion-proof electric hoist each device or device during manufacture or after the completion of the tests carried out to ascertain whether a particular device or equipment standards.
Test medium: to test the electrical characteristics of various test medium in general, comprising: an insulating, static electricity, voltage, etc.
Sample test: explosion-proof electric  wire rope winch  several randomly selected sample test, the sample is also used to ascertain whether a particular standard.
Life Test: To determine the required proof hoist may reach the life conditions of testing, or for the evaluation and analysis of the product life characteristics of tests carried out are destructive tests.
Tolerance test: including certain period of time taken for a certain purpose other provisions specific operating conditions,manual block the explosion-proof electric hoist tests carried out, such as the repeated operation, short circuit, over-voltage, vibration, shock, etc., is a destructive test.

Five Easy Tips to improve efficiency in the use of electric hoist

Based on years of work and technical personnel,hoist equipment laboratory lessons learned in the course of the following hoist the tips to help you work more efficiently.
1, wire rope electric hoist in the course of special attention, the rope must be wrapped properly, a reliable guide rope rope, rope chaos.
2, buttons parking off sensitive and reliable, consistent action buttons labeled with gourds.
3, limit movement reliable, accurate,lever hoist reliable and accurate protection of electric hoist safe operation.
4, electric hoist hook part to ensure that swung flexible.
5, reducer running, lifting reducer sound normal, motor brake, reliable, flexible trolleys, electric hoist protection when normal operation and safety.
Note:hoist and trolley The use of electric hoist before trial whether empty normal operation to protect the safe use of electric hoist.

Climbing frame hoist several major categories

    Climbing frame scaffolding electric  lift hoist  is a new system that originated in the late eighties, early nineties, climbing frame hoist is welded tank dedicated hoist, slow, smooth operation, is its greatest feature. Climbing frame hoist according to the different ways of classification is different, here to introduce you to the main climbing frame hoist Category:
       According to the lifting equipment scaffolding, climbing frame can be divided into the following categories:manual hoist type adhesive lifting scaffolding hoists, electric chain hoist type adhesive lifting legs on frame, l plate machine type adhesive lifting scaffolding, winch-type adhesive lifting legs on frame, hydraulic lifting scaffold attachment.
       Climbing frame is picked scaffolding, suspended scaffolding, hanging scaffold scaffolding original template system evolved come,wire rope winch is to adapt to high-rise buildings, especially high-rise building construction needs of the new scaffolding. Way by climbing scaffolding, climbing frame can be divided into the following categories: Mutual climbing adhesive lifting scaffolding, Barrel adhesive lifting scaffolding, cantilever-type adhesive lifting legs on frame, rail adhesive lifting scaffolding, guided pedestal adhesive lifting scaffolding and electric hoist composite applications and so on.

Electric hoist malfunction when used emergencies

  Electric hoist at work may suddenly stop working or there is an emergency failure,manual hoist according to the 2011 return customers do the work for common problems and solutions made ​​the following summary for your reference, we want you to use electric hoist some problems that occur when Help.
1, the weight is beyond the rated load of the hoist.
2, 6 tons prohibited under the electric  lever hoist  chain hook Flip over two lines.
3, electric hoist parts for damage
4, are not allowed irregularities electric hoist.
5, the electric hoist hoist equipment lifting heavy objects and other objects are implicated
6, are not allowed to be placed in the rain or electric hoist is particularly humid.

The most widely used proof tools

   In the riot tools and lifting sling, in addition to the most widely used explosion-proof electric  rope hoist  outside there are a lot not known to everyone, such as: electrical riot, riot lighting distribution box, explosion-proof button box, riot corrosion outlet box, Vandal-proof junction box, riot sound and light alarm, riot control button, hoist button riot, explosion-proof circuit breakers, riot bells, riot ballast, electromagnetic lifting riot riot tools such as first off the lifting spreader etc..
These tools are able to riot in high-risk places with explosion-proof, hazardous range small role, the use of these tools riot more secure and reliable,lever hoist able to reduce the occurrence of dangerous operation.
        Explosion-proof electric hoist is a special tool for lifting slings, lifting slings is one for a wide range of industries, the use of more safe and reliable, able in the petroleum, petrochemical, gas stations, oil depots, gas, chemicals, military, electric power, mining, electronics, railways, and other potential fire and explosion hazard environment, the job impact of the product will not produce friction between mechanical sparks to effectively prevent fire accidents, ensure that state property and personal safety. Explosion-proof electric  wire rope hoist  machinery and mechanical maintenance is essential for special tools.

Electric hoist inspection and maintenance are also cycle

Product inspection and maintenance are cycle electric hoist as small light lifting equipment is no exception,lever hoist not only to maintain but also to master the correct method hoist inspection and maintenance cycles can extend its life to ensure efficiency.
      Electric hoist parts more, different techniques for the various components of the characteristics of the actual work will be maintenance, inspection cycle is divided into weeks, months, years, the specific content of each period are as follows:
      A weekly maintenance and check again:
      1) Check the nut on the brake, the opening pin, the positioning plate is complete, loose, the lever and the spring no cracks; brake is reliable braking, the brake pad to open the opening when the brake should be less than 1.0mm and the brake wheel clearance distance should be equal on both sides of each axle pin may not have stuck.
      2) safety switches and limit switches are accurate, flexible and reliable work, especially electric hoist up limit is reliable.
      3) on the drum and pulley rope wound is normal,manual hoist without off-tank, channeling, knotted, twisted and so on.
      4) Check the hoisting mechanism coupling closures fastening screw is loose, the shortage.
      5) agencies transmission is normal, no abnormal sound.
      6) Check all lubrication lubrication condition is good.
      2, the monthly inspection and maintenance, inspection and maintenance, we cover the content but also have weekly:
      1) Check the wire rope for wear, if there is broken wire and so on, check the wire rope lubrication conditions.
      2) Check the hook for cracks, wear and tear of its dangerous section does not exceed 5% of the original thickness; hook nut locking device is complete.
      3) Check the motor, reducer bolts fastening the base and individually fastened.
      4) Check the gearbox lubrication conditions, the oil level should be within the specified range, measures should be taken against oil leakage sites prevent leakage.
      5) Check the balance at the rope pulleys for wear on pulleys and pulley shaft lubrication.
      6) Check the pulley position, to see whether it flexible, without damage, cracks, particular attention to the wear of the fixed pulley shaft.
      7) Check the brake wheel, uneven surface of its work should not exceed 1.5mm, brake wheel should not have cracks, its radial runout should be less than 0.3mm.
      8) Check the coupling, which should not be on the key and keyway damage, loose.
      9) Check the size of the vehicle operating conditions, should not have gnawing rails, three fulcrum,hoist and trolley when the pendulum starts and stops and so on.
      10) on the hoist to conduct a comprehensive clean, remove dirt on it.

Electric hoist limiter relevant safety technology

 Overload limiter is safe to use electric hoist one of the essential parts, played a limited role overload,manual block the following with you to understand the relevant safety limiter technology.
1, overload limiter Scope: 0.5T ~ 32T kinds of electric hoist single girder cranes;
2, the system error: less than ± 5% (F.S);
3, the sensor static strength: the strength of the sensor is 1.5 times the rated load;
4, the overload limiter operating temperature: -20 ℃ ~ +60 ℃;
5, relative humidity: 45% ~ 95%;
6, overload limiter power supply voltage: AC380V, 50HZ or according to user requirements;
7, the relay contact capacity: relay contact capacity AC380V, 2A;
8, the controller of the pressure:lever hoist to 2000V;
9, display: four LED (red) from the weight of the digital display, the decimal point is 2.
10, electric hoist overload limiter warning mode: sound alarm;
(1) Pre-alarm: When the rated lifting weight lifting weight of 90%, the issue of intermittent alarm sound (short beeps), indicating heavy weight;
(2) Ratings alarm: When the rated lifting weight lifting weight of 100%, the issue of intermittent alarm sound (long beeps), indicating heavy weight;
(3) immediate alarm:wire rope winch When the rated lifting weight lifting weight of 110%, emits a continuous alarm sound, the red indicator light, and automatically cut off the power supply contactor crane rising, indicating heavy weight;

Stage-specific hoist use, maintenance and testing

   Stage-specific part of the  manual hoist  electric hoist in strict accordance with touring exhibitions requirements design, black surface treatment, 110 volt control circuit heat treatment, forming a steel chain guide plate to the positive and negative way and designed to be used around the clock, with adjustable screw limit switches, higher reliability, chain galvanized, rust, grease installed in the gear box, to prevent the oil droplets penetrate into the arena.
Stage electric hoist used:
Electric hoist operating voltage and frequency are marked on the motor nameplate rated voltage on in connection stage before powering electric chain hoist definitely want to check these figures consistent with those of the supply voltage. Stage hoist hanging point should be an appropriate size to accommodate the arena of electric chain  lift hoist  hook or hooks at the top of the eye and allow it, on a modest placed in the saddle and it must be competent enough to support the crane lifting capacity at maximum power .
Stage electric hoist maintenance:
1, electric hoist initial lubrication:
Bearing Chain: refining of the entire length will need to be lubricated, including through the chain CHAIN ​​place to be determined is the contact point between the connecting rod is to be properly lubricated.
Gearbox: ambient temperature is about -10 ℃ to +50 ℃ between, you should use 220mm2 / S 40 ℃ temperature and high pressure gear oils with additives, gear oil specifications for DIN51502CLP220.
2, electric hoist objects surrounding the removal of:
Electric chain hoist will need to be hung in a place without hindrance. Suspension point should be a position that allows carrying hooks and any anticipated load for rising and falling action unhindered. Lumps must not hit bottom ground, if there is a need,hoist and trolley in the refining end of the slack adjustment CHAIN ​​stopped position.
Stage electric hoist final test:
Electric chain hoist on stage after completing the assembly, but the crane being used in normal operation, the following procedure should be performed. Isolated Power: Check all mechanical and electrical connections and connections are locked and is solid.

How to test the speed of the electric car

Electric sports car run a speed test on the track (beam) is not less than 2M together on the highlights of each given tag, when the electric sports car that is running to mark start time and run to another timing mark is terminated, repeated four times, respectively for speed average.
Electric  wire rope hoist  parked in the main beam span, and gradually add to the chorus of 1.25 times the rated load, load rises from the ground 100 - 2011MM, vacant 10min, after uninstall electric sports car open to the ends of the main beam and then check whether the main beam permanent deformation. Repeat three times, allowing Xuzhu Liang 1,2 times a little deformed, 3rd main beam should not produce permanent deformation. Test will open to cross-end electric sports car, check the main beam is indeed camber.
For electric hoist gantry crane electric  load chain  should also make stops at each girder cantilever effective at both ends, and gradually loaded to 1.25 times the rated load, load rises from the ground, floating 10MIN, electric sports car after uninstall legs open to the main beam at check the main beam in the presence or absence of permanent deformation.manual hoist Repeat three times, the first and second rounds to allow mutual understanding and a little deformed, 3rd main beam shall not produce permanent deformation.

Electric wire rope hoist complex institutions

    Electric  wire rope hoist   usually have huge institutional structures and more complex, so this type of hoist hanging objects can be varied shapes, load changing, running range, wide space, the load and the working environment, the job often requires people with , exposed, the active part is large, and in direct contact with the transported person.
         Also there are many more risk factors, but also the decision of lifting injuries Cadogan, to ensure the safety rope hoist operation can be more heavy lifting, in addition to security measures should be doing, should also have a professional operator operations,hoist equipment but also through a variety of types of research projects to test various new accessories and higher technical requirements to achieve a high wire electric hoist more secure operating performance.
        Electric wire rope hoist is a kind of electric wire rope as the lifting capacity  lift hoist   lifting equipment with this after running the car as the overhead monorail cranes and electric single-beam or double beam, cantilever, gantry crane hoist as lifting heavy lifting and walking run institutions.

Rotate the hook after treatment

      When rotating hook after hook wire rope kink,hoist equipment this time can no longer be landing hook, otherwise it is possible to make them a rope damaged by excessive force, may take the following approach:
       (A) in the weight lifting off the ground is not high and the machine performance permitting, you can use luffing way to put weight down, then put positive spin hook.
       (2) If the weight has been lifted high off the ground, you can only think of ways to close the surrounding buildings,load chain or other person crane hanging cage to spin positive hook.
       (3) In case of hook rotation, torque should release the rope, the specific method is: the hook into the ground wire to unlock the fixed end, in accordance with the hook rotation number m times the rope match n is the number of base k (as the case may increase or decrease), according to the wire rope strands twisted inverse direction,manual hoist turn the end of the rope release torque, then loaded on a fixed end. Will play a maximum elevation boom, hook ups and downs repeated several times to check the results, you can repeat the above steps until the hook stability.

Rotating hook prevention and avoidance measures

      In practice, the following measures can be taken to improve the stability of the hook in order to reduce the possibility of rotating the hook:
       (1) When a plurality of pulleys hook,lift hoist and boom to the extent possible with the use of a pulley on the outside by a pulley;
       (2) there are multiple hooks on the crane when possible, use larger diameter pulleys;
       (3) make use of wire rope double the number of the number of horses; conditions permit, try to use more number of horses to reduce the single-piece force;
       (4) around the wire rope wear, the top section of the crane hook pulley and not between the pulleys shifted too much to reduce the rise and fall of the hook wire rope hooks horizontal rotational force generated;
       (5) in the lifting process,lever hoist the boom top and the hook as far as possible to reduce the length of wire between, for example, using methods such as larger span;
       (6) When lifting, use slip rope hanging objects to be controlled so that, if the lifting height is relatively high, but is not required to rotate the hook in place, you can lock the hook;
       (7) when lifting the driver to have a smooth operation, landing hooks and rotary movements do not simultaneously;
       (8) Optional rope when other conditions are met in the case, try to choose "no spin" rope;
       (9) crane wire rope used for a period of time,hoist and trolley or to re-wear around the fixed end untied the rope release torque.

Rotate the hook phenomenon

   Rotate the hook often occur without any warning lifting operations in the device, when the crane lifting weights,rope hoist the hook spin up, worn around the hook and boom top pulley rope twisted tangled between being the heavy lifting is also rotated together with the hook up, then have been unable to continue lifting or lowering a weight lifted. Rotate the hook lifting operations will affect the normal conduct of a serious threat to the safety of operating personnel and equipment, it is necessary to avoid its occurrence.
       Rotate the hook with the following factors:
       (1) The more large cranes, lifting height of its higher, that boom among the top rope pulley block and hook longer the greater the possibility of rotating hook;
       (2) into a single hook wire rope reeved match the number of matches than double the number of rotating hook is easy to make and wear around the steel wire rope of a small number of matches,wire rope winch the greater the possibility of rotating the hook;
       (3) exposure to a single rope greater the weight, the greater the possibility of rotating the hook;
       (4) The dimensions of the hook component and smaller the size of the pulley, the greater the possibility of rotating the hook;
       (5) Operation crane hook landing speed is not stable, especially when heavy loads from the ground,manual hoist increasing the likelihood of the hook rotation.

Rotation causes the hook

   Causes rotation causes the crane hook internal and external factors.
       Hook rotating internal reasons but also its root causes.
       Lifting machinery (such as:wire rope winch electric hoists, chain hoists) rope used either type, size, grade, will be in force when torque is generated. Torque is due to the rope caused by manufacturing methods, first wire helically twisted together to form a stock, and then a few shares and spirally twisted together to form a rope. When the force, the wires and stocks will be straightened, but when lifting operations rope ends are fixed,load chain so that torque is formed inside the rope. Another source of torque is formed wire pitch in use for some time becomes long, so that it is fixed at the end of the case, the rope is unstressed will produce a torque, the torque the presence of a rotating hook assembly trend .
       On the other hand there are many external factors that lead directly hook rotation, such as lifting process of manpower hook external force such as the wind turning drivers operate heavy swinging hook and the instability that led to rotating hook,hoist and trolley hook for wear around the way resulting imbalance hook hook rotation.

Electric hoist unlimited remote control technology

 Electric  lift hoist  under normal circumstances are used by people to follow the control button on the ground, using the wired remote control. Nowadays with technology innovation wired control has been replaced by wireless.
Electric hoist wireless remote control is mainly the use of advanced electronics and wireless communications technology for electric  wire rope hoist  in the job offer high-performance, reliable data in the remote distance transmission scheme. Electric hoist wireless remote PLC via wireless multiple-way switch, analog transmission, multiplexing, on a distance of 100 meters per one thousand meters. To-point communication, but also multipoint communication, without additional programming, no wiring, no electrician can debug.
        Electric  rope hoist  wireless remote control technology allows us to use a simple, more convenient operation.

Construction crane Safety Evaluation System Overview

In order to carry out scientific and accurate construction crane security rating, need to propose different devices risk assessment, monitoring and early warning accident prevention measures,manual block the establishment of construction crane safety evaluation system.
Construction crane safety evaluation system as follows:
Construction crane safety evaluation of all aspects of the device to which the design, manufacture, installation, use, alteration, repair, use, scrapped every stage. Safety Safety Assessment is divided into pre-evaluation, safety acceptance evaluation, safety evaluation and special safety evaluation four categories.
(A) safety pre-assessment is in construction crane design, production carried out before, the project aims to analyze and predict the presence of dangerous and harmful factors, the type and extent reasonably practicable,lift hoist the safety of proposed technical design and safety management advice. Safety purpose of the evaluation is to identify the pre-construction crane manufacturing process inherent hazards or potential hazards and harmful factors; been selected by the evaluation method to evaluate the risk of harm arising from the extent of the main conditions; relating to safety and quality control regulations, standards, and combined with the actual situation exists for the construction crane hazardous and harmful factors put forward corresponding countermeasures, measures;
      (2) evaluation of safety and acceptance in the construction crane manufacturing factory or installed and put into use before the end of the evaluation, designed by the construction crane operating conditions of testing, inspection, find the device officially running the risk may exist, harmful factors put forward reasonable and feasible reform program of security technologies and security management measures;
(3) safety evaluation for construction crane (eg: electric hoists, chain hoists) security status of the safety evaluation, designed to find the existence of dangerous and harmful factors that determine the extent to propose reasonable and feasible safety countermeasures and suggestions. Include the following: a comprehensive collection of information needed for the evaluation, the use of appropriate methods for safety assessment hazard identification, the security status given quantization parameter values; may cause significant consequences for accidents, with the corresponding mathematical model for accident simulation, forecasting the impact of extreme circumstances the scope of the accident the maximum loss, and the probability of an accident; the discovery of the hidden dangers, according to quantify the security status of parameter values, the priority of the rectification sort;
(4) special safety assessment is based on the requirements of government supervision and management department carried out, for security issues of special safety analysis and evaluation, such as registering at construction crane equipment evaluation and rectification when lifting device evaluation. Special safety evaluation generally is for a certain type of construction crane or safety devices exist dangerous and harmful factors of safety evaluation,load chain the purpose is to find the existence of dangerous and harmful factors that determine the extent of proposed safety measures and reasonable and feasible recommendations.
Construction crane safety evaluation reads as follows:
The basic contents of the safety assessment, including hazard identification and risk assessment in two parts. Hazard identification, including hazard identification and calculation of risk-free rate; risk evaluation, including identification of indicators and risk control. Safety assessment through risk identification and risk assessment. Objectively describe the degree of risk construction crane, guiding people to advance to take appropriate measures to reduce the risk of construction crane.

Safety procedures and precautions

1 Only trained personnel may operate the hoist.
(2) If there is no electric lift hoist  limit switch, to strictly control the hoist does not rise too high or drop too low, so as not to pull off the heavy chain pin, dangerous.
(3) Do the following end hook hanging objects must be correct in all studies within the tongue.
4 Do not use substandard lifting chain or rope.
5 Do not use the voltage specified range Frequency (HZ)
6 To avoid electric shock, before they can be fully grounded.
7 attention to the power of three-phase or single-phase voltage magnitude.
8 electric  manual hoist  strength enough to be installed in the structure.
9 In the reverse actuation ago Remember determine the motor has completely stopped before performing, non-sudden reverse operation.
10 Avoid strenuous lifting up and down.
11 Install electric hoist, hoist and trolley the power cord Do not pass through the gear box above the rings.

Buy electric hoist, please choose the regular manufacturers.

How to repair and fix because of power outages caused by the failure to hoist

General electric  rope hoist  is a lot of construction machinery will be used, but even the best machines will have trouble, when, where mainly solve recurring failures such as power outages. Mainly because of power outages did not hoist the rated working voltage is turned, unable to work, the reason there is a solution with the power supply system is not right to send electric power electric hoist, hoist the main, the control circuit of electrical damage, the line is disconnected or bad , such a situation, the need to repair the main, the control circuit, be sure to hoist the motor is disconnected from the power line, when the confirmation Lord, control circuit trouble, before re-commissioning; hoist motor starting torque is too small, so  lift hoist  lifting not moving goods, and can not work, check with a multimeter or voltage meter and other measuring motor input voltage, indeed due to low voltage, so that the motor can not be started, the need to restore the normal system voltage, etc. before using electric hoist. Do not overload the production of an electric hoist, when the goods are excessively overloaded, do not move cargo crane hoist motor only make noise, but not running, and in severe burning motor, or even cause an accident, then should immediately stop using the manual hoist  in the lifting process occurred broken teeth, broken shaft brake failure occurs, conventional electric hoist can not play a protective role in the accident consequences will be disastrous. Load protection overload protection is common, for some special circumstances, requiring electric hoist crane being lifted can not occur on the rail car stuck or broken rope or fixed rope off phenomenon, it requires a super electric hoist, underrun protection. Electric hoist overspeed protection is also necessary, when the electric hoist conical surface and the second brake brake brake surface wear or planar grid voltage fluctuation, set in the high-speed shaft speed sensor will cut off the main power from the electric hoist to the protective effect.

About electric hoist lifting and durable method

         Electric  rope hoist  lifting hanging objects and run when improper methods. Electric hoist then make hanging objects swing accidents. Electric hoist lifting hanging objects, when the wire rope or 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;hoist equipment electric hoist lifting is not too Meng, hanging objects from the obstacle when accelerating until after lifting speed; electric hoist hanging objects runtime. Under the conditions allowed by the rigger hoist hanging objects in the rear 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.
      Features: Small size, light weight,wire rope winch easy operation, the chain is more resilient, and more rugged wear at work to ensure the safety. And the chain hoist is equipped with a chain bag, so that looks clean and tidy electric hoist, chain bag is also equipped with anti-rust oil, so when the electric chain hoist when not in use on the chain bag will not rust, extend the life of electric hoist!

Electric chain hoist is installed correctly process and notes

Install electric chain hoist is allowed to work correctly the first step,
First, install  chain block  must first install the chain box;
Second, connect the power cord: Connect the power cord must be cut off in advance. Meanwhile ground should be well grounded, otherwise the operator touches any part of the chain hoist or when you are likely to feel a shock feeling.
Third, lubricate chain hoist load chain: the chain lubrication level is a load chain life is an important factor. Timely and effective lubrication of the load chain, in order to ensure the effective life of the chain.
Fourth, check the chain arrangement: For multi-line chain, electric chain hoist, the hook should ensure that the next frame will not be overturned. If you flip it back to its normal state, to ensure the chain of weld arranged in rows. Finally, check the operating voltage: Because electric  manual hoist  factory, is based on a user-specified voltage or high voltage equipment, check the wiring and make sure the power supply voltage requirements are met.
  Tips: Installing electric chain  lift hoist ,  if the improper voltage operation, may cause electric chain hoist causing serious damage.

Pulling Device for electric hoist crooked importance of the work

 Electric 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 electric  wire rope hoist   ranging from making cable, wire rope scrapped, while in the whole electric 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  lever 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 :
Component 2 will expand the center hole; 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 before skewness 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.

Lifting of common terms

1 hoist
By the Department of Public hanger mounted on the drive unit, transmission, brakes, and roll up flexible member, or clamping device lifting small light lifting equipment
2  manual hoist s
By the Human traction chain and sprocket drive through, and finally by the star wheel or have their nests reel lifting chain sprocket to drive extract the hoist lifting device
3 lever hoist
Driven by a human through the trigger wire rope or chain to extract device driven hoist movement
4 wire rope pulling hoist
Driven by a human through the trigger wire rope clips connectors, alternating traction rope to extract device driven  rope hoist  movement
5 chain lever hoist
Driven by a human through a nest trigger reel lifting chain sprocket to drive extract device hoist movement
6 electric hoist
Driven by electric motors, the final reel, the star wheel or sprocket nest reel lifting rope or lifting chain, in order to extract device driven hoist movement
7 light small lifting equipment
Compact structure, simple operation, easy operation, the operating range of the projection points, lines based portable crane
8 jack
Rigid top piece as a working device, through the top or bottom bracket claws in a small itinerary portable lifting heavy lifting equipment
9 jackscrew
Using screw or screw driven down the sleeve as a rigid top piece of jack
10 rack jacks
Used as a rigid top piece rack jack
11 hydraulic jacks
Using plunger or cylinder as rigid top piece of jack
12 tackles
By the fixed pulley block, pulley block and sequentially moving around a fixed pulley and movable pulley  chain Block  ng ropes consisting of light and small lifting equipment
13 pneumatic hoist
Compressed air-powered hoist
14 winch (hoist)
Power-driven reel via a flexible member, means to drive movement extract hoist

Two-speed electric hoist used daily Precautions

1. After a new installation or installed after dismantling the hoist should first be empty commissioning times. But not before the installation is complete, avoid power test rpm.
2. In normal use should be carried out to 125% of rated load, lifting off the ground about 100 mm,chain Block 10 minutes of static load test and check whether it is normal.
3. Dynamic load test is based on rated load weight for repeated lifting and move around the test, trial and check the mechanical transmission parts, electrical parts and connecting parts are normal and reliable.
4. In use, the absolute prohibition does not allow circumstances, and exceeds the rated load and nominal hourly closing times (120 times) of the cases.
5. Installation and maintenance, must be strictly checked limit device is flexible and reliable, when hook up to the upper limit position, the hook from the shell of the housing to the roll must be greater than 50mm (10t, 16t, 20t must be greater than 120mm). When the hook down to the lower limit position, should ensure safety rope on the drum circle, circle must be effective and safe in two laps or more.
6. Pressing both allowed the opposite direction of the electric  lift hoist  movement flashlight door button.
7. After work necessary to supply the total gate opened, cut off the power.
8. Hoist by hand manipulation, the manipulator should fully grasp the safety rules, non-pulled oblique hanging crooked.
9. In use must be performed by specialized personnel hoist regularly checked and found that failure to take timely measures and carefully documented.
10. Adjust the amount of electric hoist brake down, they should ensure that the rated load, brake down the amount S ≤ V/100 (V stable within the next minute the load lifting distance).
 11. Rope discard criteria: wire rope inspection and discard criteria by CB/T5972-1986 "crane wire rope inspection and retirement of practical norms" implementation.
12. Electric hoist use must keep enough oil and keep oil clean and should not contain impurities and dirt.
13. Oiled rope should be used when a stiff brush or a small piece of wood is forbidden by hand directly to the working rope oiled.
14. Electric hoist does not work, you can not put heavy objects hanging in the air, to prevent parts produce permanent deformation.
15. During use, if found fault, immediately turn off the main power supply.
16. Use should pay particular attention to the situation of wearing parts.
17.10 to 20 tons  hoist equipment  in the long continuous operation may occur after automatic power-off phenomenon, which belongs to the motor overheating protection function, then you can drop over a period of time until the motor has cooled down you can continue working.

Metallurgy electric hoist limit function has an upper limit of the dual

1, metallurgical electric hoist working class M5, M6; operating ambient temperature not higher than 60 ℃.
2, there is a lifting mechanism configured to support brake and a safety brake, metallurgy electric hoist during normal working hours, by the conical brake motor brake,manual hoist brake motors to support conical brake, brake failure or when the conical motor intermediate transmission link fails, the high-speed shaft mounted reducer DC electromagnetic brake for heavy braking, to avoid heavy stall danger. Meanwhile, in order to coordinate the conical brake motor and the DC electromagnetic brake operation between, an additional delay in the control circuit device, to avoid traffic jam occurs motor.
3, with the upper limit dual limit function. The first limit is weight limit, the second limit of conventional electric hoist upper and lower limit stopper off the fire.
4, from the weight limit protection, electric hoist lifting 90% rated load lifting limiter alarm, 105% of rated load  lift hoist  power to stop working.
5, high-temperature insulation protection, electric hoist drum shell in the design and installation of the machine below the heat shield to isolate the molten metal heat radiation.
6, lifting the motor and run the motor insulation class using specialized metallurgical hoist used in metallurgy,wire rope winch lifting hoist molten metal industry, job level to M6. Adds a safety brake disposed directly on the roll, to the maximum security for lifting products.

Electric chain hoist not distorted in the chain hoist hanging on the load

1, two-speed electric chain hoist installation need to install Winders
2, Connect the power cord to connect the power cord, the power must be cut off in advance. Meanwhile ground should be well grounded, otherwise the operator touching any part of the chain hoist or when, may feel a shock feeling.
3, lubricate chain hoist load chain, chain lubrication extent affect the load chain is an important factor in life. Timely and effective lubrication of the load chain, in order to ensure the effective life of the chain.
4, check the chain arrangement,load chain for multi-line chains, two-speed electric chain hoist, the hook should ensure that the next frame will not be overturned. If overturned, restore it to its normal state, to ensure the chain of weld arranged in rows. Do not twist the chain hoist hanging on the load.
5, check the operating voltage due to electric chain  lift hoist  factory, is based on a user-specified voltage or high voltage equipment, such as 230/460V, need to check the wiring and verify contentment supply voltage requirements. If not, please refer to the instruction sheet to be corrected in order to meet the required operating voltage requirements.
Two-speed electric chain hoist installation Tips:manual block Install two-speed hoist, if the voltage at inappropriate manipulation might be caused by severe electric chain hoist damage. In order to prevent this situation thrown, it is necessary to ensure that the necessary wiring meet power requirements.

Best electric hoist hanging objects hanging around 0.5m from the ground

  Electric hoist hanging objects from the car and run when improper methods, electric hoist then make hanging objects swing accidents. Electric  rope hoist  lifting hanging objects, when the wire rope or 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; electric hoist lifting of hanging objects is not easy too high,hoist equipment generally over a secure channel up to 0.5m for the good things.
      Electric hoist hanging objects runtime. When conditions permit, it is 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,wire rope winch electric hoist if hanging objects swing or jitter, should be running side edges steady running hook, not let it shake or swing.

Explosion-proof electric hoist static load test in place in order to ensure safe operation and accurate product

Explosion-proof electric  wire rope hoist  on static load test conducted according to the following procedures and requirements, so as to ensure accurate and safe to use, let a few minutes for your professional first volume:

    a. first start lifting mechanism, the empty load lifting operation, and make the car run back and forth on the whole trip, this load test run should not be less than 3 times already, there should be no anomalies.
     b. across the car parked in orbit, and gradually increases the load for lifting commissioning until the rated load applied after the car on the track full stroke. Running back and forth several times, departments should no abnormal phenomenon, after removal of the load should be no track anomalies.
     c. the car parked in orbit span, no impact to lifting nominal weight of 1.25 times the load from the ground at a height of 100 ~ 200mm, suspension residence time should be less than 10min, and there should be no instability phenomenon, then removal of the load, the car open to cross-client or feet, it is checked hoist metal structure and should no cracks, weld cracking, peeling paint, and other loose affect the safety of such damage or defects.
     d. third test not more than 3 times, and the third should be no permanent deformation, measured camber of the main beam in fact, it should be greater than 0.75/1000mm.
     e. inspect hoist track stiffness, should fast car to the track span, lifting nominal weight of the load from the ground 200mm,lever hoist electric hoist and load to be stationary, the measured values ​​on which the arch, this value the fourth is the difference between the results of the static stiffness electric hoist, electric hoist static stiffness, should be in the main beam span central S/10 range measurement. Stiffness hoist promised value 1/800S (mm).
    f. Dynamic load test run
    ① dynamic load test run should be carried out at full stroke length, from the weight should be nominal weight of 1.1 times the total starting and running time of the  manual hoist  shall not be less than 1h, the agency action should be agile, stable, reliable, security protection, interlocks and limit switch action should be correct and reliable.
    ② hoist commissioning after passing the transfer procedures.