Here are some professional and effective suggestions for repairing the deformed main beam of a single beam crane:

1、 Redesign or adjust the main beam

Reason: If the deformation of the main beam is caused by unreasonable design, such as the section size of the main beam being too small to withstand the expected load, then it is necessary to redesign or adjust the structure of the main beam.

Method: Work closely with the design team to redesign or adjust the main beam based on current load requirements and working environment to ensure sufficient strength and stability.

2、 Replace materials

Reason: The material quality of the main beam is not qualified. If low-quality steel is used, it may also cause deformation of the main beam.

Method: In this case, it is necessary to replace the material of the main beam and choose high-quality steel that meets relevant standards and specifications. At the same time, when replacing materials, it should be ensured that the size and shape of the new material match the original design.

3、 Flame correction method

Principle: Flame correction method is to locally heat the metal structure, causing certain parts of the metal structure to be "plastic compressed". After cooling, the residual local shrinkage stress is used to correct the deformation.

method:

Based on the specific deformation of the main beam, determine the location, size, and quantity of heating points.

Use appropriate heating tools (such as flame guns) to heat the heating point, and the heating temperature should be controlled between 700-800 ° C to ensure that the metal is in a "thermoplastic" state.

After heating, let the metal cool naturally, and at this time, the metal will recover some or all of its shape due to local shrinkage stress.

It should be noted that heating cannot be repeated at the same location. The heating point should avoid dangerous sections and be placed as close as possible to the partition to reduce the waviness of the web plate.

4、 Pre stressing method, repeated welding method, cutting method, and local cutting pad method

Pre stressing method: To balance or counteract the deformation of the main beam by applying pre stress.

Repeated welding method: Multiple welding is carried out at the deformed part of the main beam, and the deformation is corrected by the heat and stress generated by the welding.

Truncation method: Cut off the severely deformed part of the main beam, and then re weld or connect new components.

Partial cutting method: Cut off a portion of the material at the deformation point of the main beam, and then insert new material to restore the shape.

5、 Strengthen maintenance

Regular inspection: Regularly inspect the single beam crane to promptly identify and address potential issues such as deformation.

Avoid overloading: Operate strictly according to the load capacity of the crane to avoid deformation of the main beam caused by overloading.

Record usage: Record the usage of the crane, including load, working time, etc., in order to promptly identify and solve problems.

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