Cranes are used to lift heavy objects, so operational safety is very important. If there are problems during operation, the consequences are unimaginable, so safety must be taken into account when operating the crane.

Electric hoists lift objects through a sling composed of pulleys, wire ropes, and hooks. Therefore, the inspection and maintenance of pulleys can be strengthened from the following aspects to prevent accidents.

The lifting mechanism, trolley running mechanism, and bridge structure of gantry cranes are basically the same as those of bridge cranes. Due to the large span, most crane operating mechanisms are driven separately to prevent the crane from tilting and increasing resistance, and even accidents.

When the winch is in a relaxed state, the gap between the brake band (block) and the brake wheel should be uniform, with a gap value of 1-2.5mm between the brake band and the brake wheel, and 0.25-Lmm between the brake pad and the brake wheel. If this requirement is exceeded, the brake should be adjusted.

In order to fully implement the spirit of the Third Plenary Session of the 20th Central Committee of the Communist Party of China, assist in quality construction, and create a good atmosphere where everyone attaches importance to quality, pursues quality, advocates quality, and cares about quality……

A 10t double beam bridge crane in a certain unit has its power indicator light on and the control linkage table indicator light on, but it cannot be started. After inspection by maintenance personnel on site, it was found that the safety door from the driver;s cab to the walkway was not closed. When the maintenance personnel close the safety door and all operations of the crane are normal, this is a false fault.