Double-Girder Electric Hoist Crane

Safety regulations:

Safety Inspection of Double-Girder Overhead Crane In order to ensure the safe operation of the overhead crane, some routine safety inspections need to be carried out during the operation of the crane. The inspection items and key points are as follows:

(1) The lifting height limiter, travel limit switch and various interlocking mechanisms perform normally and are safe and reliable.

(2) All major components meet safety requirements: the opening increase is less than 15% of the original size, the torsional deformation is less than 10%; the plate hook bushing wear is less than 50% of the original size, the plate hook spindle wear is less than 5%, and there is no peeling, burrs, or welding repairs. There are no obvious defects in the hook hanger and pulley. The amount of steel wire wear and corrosion on the surface of the steel wire rope is less than 40% of the steel wire diameter, and the broken wires within one lay pitch are less than 10% of the total number of wires. There are no broken ends, no obvious thinning, no core protrusion, dead corner twisting, extrusion deformation, annealing, and burning. The clips, pressure plates, and wedges that connect and fix the ends of the wire rope are in good condition and are not loose. There are no less than 2 pressure plates and no less than 3 clips. The drum has no cracks, and the connection and fixation are not loose; the drum wall wear is less than 20% of the original wall thickness; the safety roll is no less than 2 turns, and the diameter ratio of the drum to the wire rope meets the requirements. The balance wheel is well fixed and the wire rope should meet the requirements. The brake has no cracks, looseness, or serious wear. The brake gap is of equal size on both sides and has sufficient braking force. The wear of the brake band is less than 50% of the original thickness.

Routine safety inspections of double-girder bridge cranes have played a significant role in preventing personal accidents, reducing equipment accidents, improving equipment operation rates, and reducing maintenance costs.