How does the crane choose the cable?
1. When the crane adopts the hanging cable trolley (or cable guide), the cable should be prevented from being worn and excessively bent during the movement. For cables with an outer diameter of not more than 8 mm, the diameter of the cable suspension curved plate should be at least the outer diameter of the cable. 6.3 times the diameter; for cables with an outer diameter greater than 8 mm, at least 8 times the outer diameter; for cables with an outer diameter greater than 12.5 mm, at least 10 times the outer diameter; for flat cables, the thickness of the cable is equivalent to a circle The diameter of the cable.
When the cable of the crane is arranged, ensure that the length of each cable is equal, the pressure plate is firmly crimped, and the outer diameter of the same layer of cable is as close as possible. To avoid excessive stress on a certain cable or a few cables. The suspension cable trolleys shall be provided with traction ropes between them. When running, when the distance between adjacent suspension cables is such that the angle between the suspension cables is close to 120°, the traction ropes shall be fully straightened and stressed.
2. When the cable reel is used for power supply, the cable should be prevented from being worn during the movement. For cables with an outer diameter of not more than 21.5mm, the cable reel bottom diameter 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 reel should be at least 12.5 times the outer diameter of the cable.
The cable drum of the crane shall be able to automatically wrap the cable. The driving torque of the cable drum shall not be less than the maximum winding torque required to wind the cable. During the cable-laying process, the traction force acting on the cable conductor should be as small as possible. For cables without the reinforcement core, the maximum allowable tensile force acting on the copper conductor cross-section is 20 N/mm2, which requires high cable winding speed or cable weight. When it is heavier, a reinforced steel cord that can withstand the required traction should be added as a core.
