If the gantry crane and the loading and unloading bridge carts are powered by cables, the fixed point of the cable on the ground should preferably be at the midpoint of the cart’s travel as the origin. When the midpoint is running, the cable is taken up. The unwinding of the cable is dragged by the cart, and the winding of the cable is driven by the electric motor to wind the cable drum (or use a spring).
To fix the cable on the ground, there should be a fixed bending clamp that can make the cable reverse to the left and right. The specific size can be designed by the user according to the selected cable specification. The diameter of the shaft pin can be 40-50mm. The bending clamps can be made of seamless steel pipes or water gas pipes whose sizes are compatible with the cables.
The position of the concrete base is adapted to the position of the guide pulley installed on the lower end beam or outrigger of the crane. A cushion should be placed between the cable and the bent clamp to prevent damage to the cable. The cable should be clamped in the bending clamp to prevent the cable lugs and cable lugs from being pulled apart. Keep a certain distance between the cable lug and the bent clamp to make the cable slack.
The use of suspension overhead crane (or crane cable guide), should prevent the crane cable in the movement was worn and over bending.
For crane cable diameter greater than 8mm, the crane cable hanging curved plate diameter should be at least the crane cable diameter For the outer diameter of more than 8mm of the crane cable, at least 8 times the outer diameter; for the diameter of more than 12.5mm crane cable, at least 10 times the outer diameter; for flat crane cable, the crane cable thickness is equivalent to the diameter of the round crane cable.
Overhead Crane cable arrangement should ensure that the crane cable length is equal, the pressure plate crimps firmly, the same layer of crane cable diameter as close as possible to avoid a root or a few crane cables too much force. Suspension crane cable trolley should be set between each other to pull the wire rope, the operation, when the adjacent two hanging crane cable trolley spacing between the crane cable so that the angle between the 120 °, the traction wire rope should be completely straightened force.
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