Hoist safety and inspections: Why need to perform regular inspections on electric hoists

Electric hoist is a special lifting equipment, which is installed on overhead crane machine and gantry cranes. It is small in size, light in weight, simple to operate, and easy to use. It is used in industrial and mining enterprises, storage docks and other places. 

Reasons of Electric Hoist Accidents:

• Some data show that half of the probability of electric hoist accidents is caused by operational problems, while the other half is overloaded with electric hoists.
• Overloading of the electric hoist may cause the wire rope to break. If it is broken during use, it will cause the lifted heavy object to fall, damage the object and other surrounding machinery and items, and even cause casualties.
• In addition, overloading of the electric hoist will cause the motor to run overload or even fail to run, which will lead to the sharp increase in current and heat generation, damage the motor insulation, and may directly burn the motor.

Wire Rope Electric Hoists Inspections:

1.Wire rope electric hoist motor temperature rise is too high.

• First of all, check whether the wire rope electric hoist is overloaded. The overload causes the motor to heat up.
• Then check whether the motor bearing is damaged or not, and whether the motor works according to the regulations.
• When the motor is running, if the brake clearance is too small, will generate a large frictional force. The frictional heat also increases the additional load.

2.Wire rope electric hoist can not start after heavy objects rise to mid-air, or after parking can not re-start.

• First check if the system voltage is too low or the fluctuation is too large. If it is, restart it only after the voltage returns to normal.
• On the other hand, if it cannot be started after stopping, pay attention to whether there is a phase loss in the operation of the three-phase motor.

3.Can not stop working.

• The power should be cut off immediately, the wire rope electric hoist should be forcibly stopped, and the repair the contactor or stopper. If it is seriously damaged and cannot be repaired, it must be replaced.

Wire Rope Hoist Maintenance:

• First, when connecting the power supply, must turn off the power beforehand. At the same time, the ground wire should be well grounded to avoid electric shock.
• Secondly, wire rope lubrication is an important factor affecting the service life. Timely and effective lubrication can ensure the effective service life of the wire rope.
• Third, check the alignment of the wire rope. Do not hang the load on the twisted wire rope.
• Fourth, check the wire rope electric hoist wiring and confirm whether the power supply voltage is met. If operated at an inappropriate voltage, it will cause serious damage. In order to prevent this from happening, it must be ensured that the wiring meets the requirements of the required power supply.

Hoist safety and inspections: Why need to perform regular inspections on electric hoists