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.

Stage electric hoist motors sealed in aluminum rims cylindrical motor housing Nagakubo

Stage-specific part of the chain hoist electric hoist, also called the  lift hoist .  Stage electric hoist in strict accordance with touring exhibitions to design production, surface treatment black, bright lasting, 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 a can adjusting screw limit switches, higher reliability, chain galvanized, rust, grease packed in the gear box, to prevent the oil droplets penetrate into the arena,  rope hoist  motors sealed in aluminum rims cylindrical housing within the permanent warranty motors, suitable for use with a variety of controllers and circuit distributor connected.

Stage electric hoist features:
An efficient, lightweight motors, non-asbestos brake system, low energy consumption.
2, stamping steel shell, lightweight and sturdy.
3, high-strength safety hook to withstand impact of accidental overload fracture does not occur, overweight only gradually deformed.
4, lightweight, attractive and durable molded chain bag.
5, the limit switch: limit switch hanging under the hanging device, the motor automatically stops to prevent the chain beyond, to ensure safety.
6, heat-treated steel chain guide plate forming.
7, easy to operate,hoist and trolley easy to maintain.
8, with positive and negative way and all-weather use and design.
9, with adjustable screw limit switches, higher reliability.
10, chain galvanized, rust.
11, mounted on the gear box grease to prevent oil droplets penetrate into the arena.
12, hoist motors sealed in aluminum rims cylindrical enclosure permanently protect motors.
13, suitable for use with a variety of controllers and circuit distributor connected.

Prevent damage to wire rope electric hoist method

Damaged wire rope electric  rope hoist  oil there are many, the most common situation is a broken wire rope appeared, mainly by the following three reasons:
1 Normal broken wire; normally broken wire is no way to prevent the wire rope is wearing parts, new electric hoist generally take several years to appear wire breakage situation;
2 hoisting broken wire; hoisting rope guide after the break, causing chaos around the rope, turn out the drum area,wire rope winch hinged to the motor, gearbox parts lead rope breakage. Hoisting broken wire is completely prevented. In addition to the original machine comes with the stopper out of stock can be added in addition to a hammer stopper.
This will not appear hoisting this phenomenon;
3 overload broken wire;Manual block lifting because the operator mistakenly estimate the weight of lead weights more than nominal weight, which in rare cases likely to occur. As long as the operator estimates carefully before lifting it can be avoided.

Electric wire rope hoist winch with different

Winches and  wire rope hoist  as the most commonly used light lifting, because of its ease of use, in order to maintain and many other advantages are widely used in industrial production aspects. Little difference from the appearance, perhaps from the actual use of the process found some differences. But as two different lifting machinery, they differ in what place? Here we run mode, lifting height, lifting speed, appearance and other aspects detailed level uses the difference.

First, from the point of view operation mode, wire rope electric hoist can pan around, hoist only stationary use.
Second, from the point of view to enhance the speed, the commonly used wire rope hoist lifting speed of 8M / minute, winches generally slow can reach 10M / min.
The third point of view from a lifting height, wire rope electric manual hoist  lifting height of 6 meters is usually to 12 meters, and the installation of wire rope inconvenient, will come with the installation of a series of related issues. Hoist lifting height depends on the capacity of its roll, generally in about 100 meters.
Fourth from the appearance point of view, wire rope electric hoist, small size, and steel to be used for work on the  lift hoist  slightly larger size, but can be fixed using.
Fifth from the use of point of view, wire rope electric hoist for lifting operation only, and not only for lifting hoist can also be used for towing and other operations.

How to choose electric wire rope hoist ring

To make a reasonable selection of seals, wire  rope hoist  must be familiar with a variety of forms and characteristics sealing device, the sealing material characteristics and conditions of use of the sealing means, such as the size of the working pressure, the working environment temperature, speed of the moving part . The actual conditions of use and allows the use of seals compared to the condition, it must ensure that the sealing device has a good sealing performance and long life.

Sealing material has to be compatible with the hydraulic oil, its hardness to the right. Electric wire rope hoists rubber hardness level of the system working pressure to choose. System pressure is selected high hardness rubber seals, pressure is too high, the need to design the support ring.
To make reliable sealing, long life, in the design of the seal groove, there must be an appropriate amount of compression ratio and tensile, compression rate can not be too large nor too small. Increase in the compression stress is too large, friction increases, accelerating seal wear, also easy to damage distorted short life, sometimes resulting assembly difficulties; too small, the sealing is not good, resulting in leakage.
Ring because the structure is simple, easy to install, good sealing performance and reliable operation, as static sealing when almost no leaks, it is currently used widely seals. Electric wire rope  lift hoist  is less than the amount of stretch the seal and outer circles of the 0-ring, in terms of increased life expectancy considerations, the design should be avoided centerline diameter ring is stretched, it should be possible according to the ring GB for choice, and wire rope  chain block  seal groove should be designed according to the appropriate standards. In the case of last resort only to design, but the size tolerances must be strictly controlled to meet the requirements roughness, because the sealing groove width is too large or too deep can cause the amount of compression caused by not enough leakage.

Explosion-proof electric hoist electric control system Detailed

Explosion-proof electric hoist wire rope 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 detail below explosion-proof electric wire rope hoist is the electronic control system.


Explosion-proof hoist electric control system consists of boxes, explosion-proof button control box, explosion off the fire limiter components. Explosion-proof electrical equipment enclosure securely closed 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, minimize failure due to explosion-proof electrical box out of the box number.hoist equipment In addition to the control box to run the opposite direction contactors with electrical interlocking between the outer button button control box is 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  Wire rope winch  box under the ground about 1.5m away from the high position to facilitate personnel. Reset button box with a rotary-type mushroom head type emergency stop switch, convenient in case of emergency, the motor stops running fast.
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 pusher rod thereby triggering the limiter control box contact action, to cut off the electrical power lifting. By adjusting the position of the guide rod hit the block, you can set the upper and lower limit position gourd, but must ensure that when the hook reaches the lower limit rope on the drum 2 laps still left margin.

Stage electric hoist brake is set upside down

Stage electric hoist can be used while being hung upside down can also be applied, in order to ensure proper use of brakes should meet certain safety rules, the following stage to introduce you to lift hoist  brake is set upside down common sense, for your reference.
Stage electric hoist power-driven hoisting mechanism and operating agencies should set the brake. After an accident may result in significant risk to or loss of electric hoist lifting mechanism, the system must be set each drive two separate working brake.
Stage electric hoist used as a lifting mechanism lifting the molten metal, its brake setting shall meet the following requirements:

a. When the nominal weight greater than 5t,chainb lock the stage hoist addition to setting a working brake, it must also set up a safety brake, safety brake is set in the electric hoist low level, when the working brake failure or transmission parts broken off, can be reliably amount of support to live

Constant load;
b. When the nominal weight is less than or equal to 5t, the stage setup work except electric hoist brake, but also should be in the low-level safety brake is set, otherwise the stage  rope hoist  shall be 1.5 times the nominal weight by design, or use of selected units of the crane lifting capacity

Is the maximum weight of 1.5 times, and with clear signs from the weight of the maximum weight allowed.

Stage electric hoist gear is worn how to do?

Stage electric  Wire rope hoist  is mainly used for stage touring other places, for lifting audiovisual, lighthouse, etc., according to today's technical staff to solve real-world experience to your Weapon occur when the stage hoist gear wear how to do?
Stage electric hoist gear on another failure mode is wear, worn tooth thinning. If the lubricating oil wear caused impurities, generally referred to abrasive wear. This wear is often the top and root of the tooth appears deep scratch Road, scraping road perpendicular to the section line and parallel to each other. Scraping road appears, oil temperature rise inside the reducer, gear transmission occurs shrill noise, then you must change the oil.

Because tooth deviation installation center distance deviation is too large, may cause the top edge of the gear teeth and the tooth root portion of the transition curve excessive compression, so that part of the tooth root fillet produce severe wear. Due to overload, tends to make the driving wheel or the driven pulley tooth tip (sometimes also be along the entire tooth surface) of a thin layer is worn away.
Stage electric lift hoist  for lifting mechanism gear reducer wear, tooth thickness of not less than 60% of the original tooth thickness, for operating agencies gear worn tooth thickness of not less than 80% of the original tooth thickness, more than the standard should be replaced with new gear . Tooth wear can be measured with a thick tooth caliper measurement of the pitch circle tooth thickness to test. Gear measuring caliper vernier caliper and depth gauge is integrated caliper for measuring tooth thickness.manual hoist Measurement, start drawing isolated tooth height, the measured vertical scale adjusted tooth caliper this height. Then, the card pin stuck teeth, tooth thickness measurements using the horizontal scale.

Chain lever hoist chain maintenance how to proceed

Chain  lever hoist  chain can be improved lifting objects of different heights can adjust the length of the chain is essential for the crane, it is important to improve the extract unit operating efficiency crane crane operation to expand the range plays an important role in the ring chain lever  lift hoist  chain maintenance how to proceed, the following details for you.

1 sprocket mounted on the shaft should not skewed and swing. In the same drive sprocket assembly in two end should be in the same plane, the sprocket center distance of 0.5 meters, the tolerance chain of 1 mm center distance of 0.5 meters above, the allowable deviation of 2 mm. But not with friction sprocket side phenomenon, if two series move too prone to derailments and accelerated wear. Replacing the sprocket must be careful to check and adjust the offset.
(2) the tightness of the chain should be suitable, tight increase power consumption, bearing wear chain is too loose and easily beating off chains. The tightness of the chain: from the middle of the  load chain  lift or pressure, the two sprocket center distance of about 2% -3%.
3 or by the use of chain elongation after long, difficult to adjust, remove links to look at the situation, but must be an even number. Back through the chain link should the locking plate inserted on the outside, the opening of the lock piece to be rotated in the opposite direction towards the.
4 sprocket wear serious, it should also be replaced with new sprocket and a new chain, to ensure good engagement. Not just a single or a new replacement chain sprocket. Otherwise it will cause poor acceleration engaging new chain or a new sprocket wear. Sprocket tooth wear to a certain extent should be promptly turned over to use.
5 The old part of lifting chain with a new chain can not be mixed with, or easy to have an impact in the drive, pull off the chain.
6 Lifting chain timely to remember at work filling oil. The lubricants must enter roller and inner sleeve with the gap in order to improve working conditions in order to reduce wear and tear.

Chain lever hoist principles and characteristics

Divided into  Wire rope winch  and chain lever hoist, is widely used, including wire rope pulling hoist wire rope pulling hoist domestic HSS (rated load of 1.5t ~ 3t), JHSS imported wire rope pulling hoist (rated load of 0.8t ~ 3.2t).
Chain lever hoist is also known as inverted chain lever hoist is a kind of manual lifting tool for heavy duty level.
  Chain  lift hoist  operation is very simple, just read the description is very simple, it is driven by the human rope or chain through the handle to extract driven 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 chain length. 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. Another manufacture products according to customer demand, chain lever hoist features:
1 advanced structure, the use of safe, reliable, durable
(2) High efficiency, easy operation and comfortable.
3 small size, light weight, easy to carry. ?
4 All of structural steel
5 super alloy chain
6 All of gears
7 rotating gears and shafts have bearings or bushings at
8 products surface after spray treatment
9 specialty alloy products to meet the overload hook
10 products can meet 150% of rated load weight
Chain lever hoists used in factories,manual block 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 lever hoist safety is how to achieve?

Chain lever hoists are widely used in mining, electricity, transportation, construction and other fields, to ensure the safety of use is the most important thing, the following details for you. Chain lever hoist safety is how to achieve?
First, the chain lever hoist selection and its advantages:
1 chain lever hoist brake with double pawl, durable, safe and reliable.
2 chain lever hoist-way ratchet handle on the design of the lifting and lowering the handle can be reciprocating operation.
3 chain lever  lift hoist  brake clutch device design, ie no load, will hit the median position, you can hand chain, no force can improve work efficiency.
4 is used to tighten the chain lever hoist on cables, lifting equipment, more suitable for high-altitude operations.
5 chain lever hoist advanced structure, beautiful appearance; maintenance is simple, durable; pulling force is small, labor efficiency; small size, light weight, easy to carry.
Second, the chain  lever hoist  maintenance methods:
1 hoist should be cleaned after use, and coated with rust-Shantou fat, stored in a dry place.
(2) Maintenance and repair should be familiar with the hoist mechanism to prevent the mechanical properties do not understand the principle of free disassembly.
3 gourd after cleaning maintenance,Hoist equipment load test should be conducted to confirm working, reliable braking can be delivered.
4 brake friction surfaces must be kept clean, brake parts should be inspected regularly to prevent accidents caused by brake failure.

Chain lever hoist pulley with the tacit understanding with the

Chain  lever hoist  is a small crane with manually operated. Commonly used for lifting and money it work. As the car pulled trapped pit, remove topple trees or other obstacles as well as the bridge position. In short, difficult to install in some other lifting tools narrow place, the use of chain lever hoist is particularly appropriate.
When using the chain hoist, hand pull, although only a few kilograms, but it can improve the number of dozens of tons of tons of heavy or pulling at noon. If used in conjunction with block and tackle, but also to enhance the weight increase exponentially.

Chain lever  lift hoist  lifting and towing it to complete the job, depending on their internal special agency. The agency consists of connecting rod and two prices, as shown in the role of the clamp when the clutch is like a tug of war rope clamp down like two hands tightly grasping the rope. When moving forward handle type back and forth, before and after the two teams will alternately grab rope clamp. Money clamped in the clamp,Wire rope winch the rear clamp to relax; stepping up the rear clamp, the front clamp to relax, so that the taut rope continuously from one end of the casing into the hole, and the air drawn from the other side. This complex lever handle, to complete the winding or hauling heavy loads.
In the absence of external force when the agency by enclosure two compression springs, through a system of levers, ropes produced in the early pressure, so as to achieve self-locking effect.