Requirements for the use of cables by bridge cranes

1. When a suspension cable trolley (or cable guide car) is used, the cable should be prevented from being worn and excessively bent during movement. For cables with an outer diameter of no more than 8mm, the curvature diameter of the cable suspension bending plate should be at least the cable outer diameter For cables with an outer diameter greater than 8mm, it should be at least 8 times the outer diameter; for cables with an outer diameter greater than 12.5mm, it should be at least 10 times the outer diameter; for flat cables, the thickness of the cable is equivalent to a round cable diameter of.

When arranging the cables, ensure that the lengths of the cables are equal, the pressure plate is firmly crimped, and the outer diameter of the same layer of cables is as close as possible to avoid excessive stress on one or a few cables. Suspension cable trolleys should have traction wire ropes between each other. During operation, when the distance between two adjacent suspension cable trolleys makes the angle between the suspension cables close to 120°, the traction wire ropes should be fully straightened and stressed.

2. When the cable drum is used for power supply, the cable should be prevented from being worn out during the movement. For cables with an outer diameter of no more than 21.5mm, the bottom diameter of the cable drum should be at least 10 times the outer diameter of the cable; for cables with an outer diameter greater than 21.5mm , The bottom diameter of the cable drum should be at least 12.5 times the cable outer diameter.

The cable reel should be able to automatically wind the cable, and the drive torque of the cable reel should not be less than the maximum winding torque required when winding the cable. In the process of unwinding the cable, the traction force acting on the cable conductor should be as small as possible. For cables without reinforced cores, the maximum allowable tensile force acting on the copper conductor cross-section is 20N/mm2. For cables requiring high winding speed or cable weight When it is heavier, a reinforced steel wire rope that can withstand the required traction should be added as a core.