Stainless steel ring chain lever hoist processing technology

In fact part of the stainless steel, both stainless nature, there are acid resistance, corrosion resistance. Stainless steel and corrosion resistance is due to chromium-rich oxide film on the surface (passivation film) formation. This stainless steel and corrosion resistance is relative, introduce you to the following  hoist equipment  steel processing technology details, for you to understand.



Tests showed that steel in the atmosphere, water and weak nitric acid medium and oxidizing medium, the corrosion resistance of chromium steel with the increase of the water content increased, when the chromium content reaches a certain percentage, the occurrence of corrosion resistance of steel mutation, that is, from rust to rust, never corrosion to corrosion. Many classification of stainless steel. The organizational structure at room temperature classification, martensitic,wire rope winch austenitic, ferritic and duplex stainless steel; by major chemical composition can basically be divided into chromium stainless steel and chrome-nickel stainless steel two systems; by Purpose then there is resistance to nitric acid stainless steel, acid-resistant stainless steel, water-resistant stainless steel, etc., can be divided into types by corrosion-resistant stainless steel pitting, stress corrosion of stainless steel, resistant to intergranular corrosion of stainless steel, etc.; classification according to features can be divided into no magnetic stainless steel, free cutting steel, low temperature steel, high-strength stainless steel and so on.
Because stainless steel has excellent corrosion resistance, formability, compatibility, and in a wide temperature range and other characteristics of strength and toughness,manual block so in heavy industry, light industry, household items and architectural decoration industry and other industries have access to a wide range of applications .

Solve two-speed electric hoist lifting shake

Two-speed electric  manual block  inspection work to do before use, in addition to the following three points can help you solve two-speed electric hoist lifting shaking problem.
The first point: Do not dramatic lifting loads
The second point: it slowly started moving laterally
The third point: Do not stayed
Do not lifting loads near the end of the beam side of the state to run. Lifting loads tweaking will encounter people and things or fall may result in death or serious injury. Load if tweaking, tweaking the more powerful,wire rope winch the more problems running the car, accompanied by danger. In principle, to make the load laterally tweaking. Therefore, please observe the following manipulation. Starting and ending in the electric chain hoist lateral movement, even comply with the above manipulation, lifting loads but also how much will be tweaked. At this point,rope hoist if the following manipulation, will be able to reduce the lifting load tweaking.

Stage electric hoist normal voltage

Stage electric  wire rope winch  lifting equipment most commonly used in the process of using the electric drive, the following detailed explanation of your normal voltage electric hoist stage, we want to use your help.
The normal use of the stage hoist power supply voltage divided voltage rated voltage and operating handle. Rated supply voltage range of AC 220 volts to 660 volts, nominal frequency, there are two, namely, 50 and 60Hz, stage  load chain  during use, the use of premises voltage can fluctuate slightly, but do not exceed the rated voltage fluctuation range 10%.
Stage electric hoist operating handle voltage is 24V-36V, which is the AQSIQ mandatory requirement of special lifting equipment, low voltage can effectively protect users to protect against electric shock.
As lifting equipment and electric products, the use of safety critical stage electric hoist,manual block read the instructions carefully before use and precautions.

Lifting belt scrapped norms

Lifting belt scrapped specification:
1, lifting belt is cut,wire rope hoist broken limbs, severe abrasions, rope or partial break loose limbs
2, the appearance of fiber severe wear, some thinning strands or wear any of the original strands 1/3
3, lifting belt presents breaking, there are remnants of broken fibers or particles.
4, showing the fiber to soften or aging,hoist equipment rough surface, easy peel fiber, elastic deformation, strength decreases.
5, severe bending or lifting with Norway distorted.
6, lifting belt looks too much dot loose, corroded.
7, lifting belt breakage:manual block Pull the strands, ropes eye damage.
8, has been scrapped webbing shall not re-use patch

Lifting belt maintenance home for

Lifting belt maintenance home for
1, should not be soft ring formed with any damage it may be possible to link up the installation.
2,rope hoist in the mobile lifting belt and cargo should not drag.
3, not so knotted.
4, the carrier should not make playing screwed.
5, should not be used without jacket lifting belt carrying a sharp corners,hoist and trolley edges of cargo.
6, should prevent soft ring opening angle beyond 20 °.
7, while the use of sling for a few,manual block should make the load evenly distributed.
8, lifting belt should be protected from light and no UV radiation under the conditions of storage.
9 should not be lifting with storage beside an open flame or other heat sources Sakon.
10, do not apply when the sling should be placed in a dedicated shelf.

Electric chain hoist After setting should also confirm what?

Electric chain hoist and not immediately after the installation started, the following points should be confirmed,manual hoist gourds before operation.
1, the power cable is fixed on the cable support.
2, the power supply voltage is the rated voltage of 5, connect the ground wire is being accurate.
3, chain electric hoist transport bolts, nuts, pins, etc.hoist and trolley without loss ashamed. Ensure fastening,manual block fully assembled.
4, key switch is being effectively used to protect rope installed to protect the rope pulling key switch is affected by force.
5, commissioning chain hoist must be strictly checked flexible limit device reliability.

Electric chain hoist operation failure how to solve?

    Electric chain hoist can be realized in the car comes with beams up and down and move around, particularly widespread field of use, greatly improving the work efficiency, but in the course inevitably encounter problems, load chainsuch as malfunctioning of the problem is a recent customer's one, the following summary for you to solve the electric chain hoist malfunctioning commonly used methods:
       1, the power supply voltage is too low.
       Solution: measured voltage value is less than the scale of more than 10% of the supply voltage.
       2, see the power of the original line phase is connected correctly, as it will lead to a wrong start phase protection and can not be manipulated.
       Workaround: two phase power line swapped.
       3, the control  wire rope hoist  circuit fuse burned.
       Solution: Check and replace fuse accurate
       4, the power fuse or no fuse breaker tripped.
       Solution: Check whether the current demand, replace the appropriate fuse or no fuse switch restarts.
       5, power lines or control circuit wiring fault or not connected.
       Workaround: poor contact wire breakage and repair or replacement.
       6, electric hoist motor sound, but did not rotate.
       Solution: Check the motor phases is accurate - Repair and well insulated action.
       7, the emergency switch is pressed.
       Solution: Make sure the emergency switch is pressed causes.
       8, the contactor coil circuit.
       Solution: Replace the contactor
       9, the contact is faulty.
       Workaround: manually operated hoist,manual block electric chain hoist if normal operation, the control coil or wire represents a poor contact, poor position to identify and fix it.

How to check the hoist contactor

    Contacts play a controlling role in the whole electric hoist work play a very important role in our daily work should pay attention to check the contacts section.
1, the contact with copper drops grotto file level contacts polished,manual hoist mechanical strength enough or overtravel reach the required value, replaced with new contacts.
2, to maintain the thread does not burn pine, screws tight weeks, the insulation to keep clean.
3, the contacts of the contactor contact width should be greater than 3/4.
4, arc cover intact, no card contacts, arc suppression coil is not shorted.
5, the contact should be kept open enough distance and overtravel.
6, a contact that is connected to the contact while the deviation does not exceed 0.5mm.
7, requires electric hoist contactor operation light and flexible,lever hoist bearings need regular lubrication.
8, anyway, turn contactor mechanical interlock should be adjusted appropriately when a contactor contact will be contacted, another contactor contacts is not closed, the gap is not less than 3mm.
9, electric hoist contactor magnet contact area should be greater than 75%, the contactor magnet can not skew can not be jamming, manual block and the magnet surface should be kept clean.

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

General electric 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,manual block 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 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,load chain 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 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,lever hoist 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.

Household mini electric hoist on the retaining device

1, the overall use of anti-off device is about 5mm steel plate welded to ensure adequate rigidity,Manual block difficult destruction, as well as card-bit capabilities to ensure good strength.
2, retention spring return function, but in the whole anti-off is designed to consider the use of springs and spring force so that the center of gravity because of greater weight reduction after the request of the spring, the spring is very easy to make anti-off device is reset, closure,hoist and trolley to ensure operational flexibility.
3, anti-off devices on both sides of widening and extending to the hook body, leaving a gap of 1mm, the use of ontology card, limiting the scope of the retaining device and move around, on the basis of sufficient strength so that it can not be the slot.
4, anti-off device at the maximum range of motion trajectory to ensure adequate open space, so that the hook spreader activities within the range, and with the scope of activities of the retaining device interference,lever hoist so as not to interfere with the rope hanging take work.
5, the operation flexible and reliable, spring installation easier.
6, versatile, easy to make, easy operation, low cost, high reliability, difficult to damage.
7, due to the overall strength, increase reliability depression, difficult damage, so the pin with a diameter of 5mm on the rivet, the person operating the artificial removal. Because different dimensions 2T hook still have subtle differences