In the electric shock accidents of cranes, the cranes basically use electricity as the power source, that is, electric cranes. Most of the electrical safety accidents of such cranes are caused by direct electric shock. On some cranes that use internal combustion engines as power sources, safety accidents may also occur, such as the crane's boom touching high-voltage wires.

Take tower crane for example, Huai'an Crane Leasing Company Remind everyone to pay attention to the following matters when using lifting machinery in consideration of power safety:

1. The electrical equipment equipped with the tower crane shall meet the performance requirements of GB5144-85 Safety Regulations for Tower Cranes;

2. The tower crane shall be kept at a sufficient distance from the external wires. The horizontal distance between all parts of the crane and the edge of the lifting object and 10kV wires shall be at least 2m;

3. When the crane is working at night, a working light shall be set to illuminate the working face. If the height of the tower crane reaches 30m or more, red signals shall be installed at the top of the tower and the end of the boom.

4. If there are strong electromagnetic waves near the tower crane, it is necessary to take appropriate isolation measures for the hook and body;

5. The power supply cable of tower crane shall not be dragged;

6. The tower crane shall be provided with grounding protection, and the grounding shall be repeated. Grounding devices shall be set at both ends of the track.

7. The interior and exterior of the external elevator car shall be equipped with emergency stop switches to prevent timely shutdown in case of accidents.

8. Before working every day, the travel switch, limit switch and brake of the elevator need to be checked without load.

9. On the floor where the external elevator bridge car passes, install the protective door of the electrical interlock device to improve the safety factor.

Necessary inspection of crane sling after use

1. Whether the symbol is lost, damaged or its contents are indistinct due to dirt;

2. Whether the bolts, nuts and other fasteners are loose;

3 Abnormalities such as wear, corrosion, cracks (including welds), plastic deformation, etc. of the primary stressed components of the metal structure;

4 The main parts, such as the hook (including the straight shank hook nut locking device), lifting lug (trunnion), drum, wire rope and rope end fixed connection, clamping sling arm (including claw, lifting tooth), open gear, roller chain and other abnormal conditions such as wear, corrosion, plastic deformation, cracks, etc;

5 Wear, corrosion, plastic deformation, crack, broken wire, fusing, scorching and aging of fiber products, etc. of chain link, wire rope (including fiber, sling and cable eye end fixed connection) and end accessories of slings (including slings);

The inspection of slings and riggings after use is mainly aimed at these five aspects. Doing a good job in each inspection not only ensures the safety, but also can find the shortcomings in time.