The inspection rules for the main beam of a double beam crane can be summarized as follows:

Appearance inspection:

Check the appearance of the main beam for signs of damage, corrosion, deformation, etc. These phenomena may affect the overall structural strength and stability of the crane.

Wire rope inspection:

Pay attention to the breakage of the steel wire rope. If broken wires, strands, or wear are found to meet the scrap standard (for example, if the surface wear and corrosion of the steel wire is less than 40% of the steel wire diameter, and the broken wire is less than 10% of the total number of wires within one lay), a new rope should be replaced in a timely manner.

Check whether the end connections of the steel wire rope and the fixed clips, pressure plates, and wedge blocks are intact and not loose. The number of pressure plates should not be less than 2, and the number of clips should not be less than 3.

Pulley block inspection:

Mainly inspect the wear of the rope groove, whether the wheel flange is cracked, and whether the pulley is stuck on the shaft. These will affect the service life of the steel wire rope and the safe operation of the crane.

Wheel and rim inspection:

Regularly inspect the wheels and tire surfaces of the double beam crane. When the wheel rim is worn or cracked to a thickness of 10%, it should be replaced with a new one.

Brake inspection:

Check the brakes at least once per shift. The brake should act accurately and the pin shaft should not get stuck. The brake shoes should be correctly installed on the brake wheels, and the clearance between the brake shoes should be equal when releasing the brake.

Main component inspection:

Check if all major components meet safety requirements, such as opening enlargement less than 15% of the original size, torsional deformation less than 10%, etc.

Electrical system inspection:

Check if the cables, wiring, switches, circuit breakers, etc. of the electrical system are functioning properly. Pay special attention to whether the main power switch of the protection box has been cut off, and it is strictly prohibited to conduct live inspections.

Work brake inspection:

Check if the working brake is working properly, the wear of the brake band is less than 50% of the original thickness, the brake gap is equal on both sides and the size is appropriate, and there is sufficient braking force.

Other precautions:

Check if the connecting bolts of the rotating parts of each mechanism and the fixing bolts of each component are tightened.

Check if there are cracks on the hook, if the anti loosening device of the hook nut is complete, and if the lifting tool is complete and reliable.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment