Discussion on the safety of group crane electric hoist

Group crane electric hoist is a light and flexible lifting and transportation equipment. The electric hoist has a compact structure, and the electric hoist whose motor axis is perpendicular to the axis of the drum adopts a worm gear transmission device. Its disadvantages are: large length dimension, large width dimension, rough structure, low mechanical efficiency, and difficult processing. The hydraulic system is dual-controlled, and the pressure can be precisely controlled by the overflow regulating valve and the magnetic contact pressure gauge. The electrical control department adopts low-voltage control, which increases the safety of the control system. When using the group hoist, if the operator uses the incorrect method, it will cause many safety problems. The electric hoist has a compact structure, and the electric hoist whose motor axis is perpendicular to the axis of the drum adopts a worm gear transmission device. Its disadvantages are: large length dimension, large width dimension, rough structure, low mechanical efficiency, and difficult processing. The hydraulic system is dual-controlled, and the pressure can be precisely controlled by the overflow regulating valve and the magnetic contact pressure gauge. The electrical control department adopts low-voltage control, which increases the safety of the control system. For example, the quality of the cable, upper and lower limit insurance, cable guides, electrical equipment, etc. may cause problems and require timely maintenance. Therefore, the correct use of group hoist is the most critical. In the recent overhaul workshop, it was found that the damage rate of the electric hoist of the group hoist was very high, mainly due to man-made damage, improper operation or brutal operation during the operation.

The damage of group hoist is manifested in oblique pulling operation, overload lifting, cross lifting, etc. It is easy to damage the cable and guiding device, until the cable is bent, deformed, overlapped or severely corroded, and the operator deliberately pulls the upper and lower limit devices , Artificially invalidate the safety device. All these operating phenomena are illegal operations, hidden dangers of accidents and unsafe operations. They not only damage equipment and increase maintenance costs, but more importantly, they can also cause personal injury.

To this end, I hope that the majority of employees will raise their awareness of production safety, adhere to the idea of safety first, cherish their bodies and health, and put an end to all illegal activities.