What Should I Do If The Main Beam Of The Workshop Bridge Crane Sinks?

What should I do if the Main Beam of the Workshop Bridge Crane Sinks?

The stress direction and nature of each part of the metal structure of the double-girder bridge crane are different. Some of these stresses come from load effects, and some are caused by uneven shortening of the manufacturing process, welds, and adjacent metals.

During the operation of the crane, these stresses tend to become uniform and disappear, thus causing plastic deformation of the structure.

The impact of crane transportation, storage and hoisting, and unreasonable transportation, storage, hoisting and installation will cause deformation of the bridge structure. When a double-girder bridge crane is designed under certain conditions, unreasonable use such as overloading and unbalanced loads will cause bridge deformation. For example, a factory's 50-ton double-girder overhead crane was often overloaded, and the main girder sank 40 mm within 3 years.

The repair method affecting the bridge is gas cutting or welding. Uneven heating can also cause bridge deformation. Under the influence of high temperature, the main beam of the double-girder bridge crane used in the hot work shop sinks, which is more common than in the cold work shop, and the degree of sinking is also more serious. The reason is that due to the radiant heat of exercise, the temperature of the lower cover plate of the main beam is higher than that of the upper cover plate, and the extension of the lower cover plate is greater than that of the upper cover plate, which causes the camber of the main beam to naturally decrease under the load effect.

When the main beam of the double-girder bridge crane drops, it means that the original supplied main beam bends downward. This is because the main beam is fatigued due to long-term overloading. It should be stopped immediately and then reported to the crane manufacturer's professional technicians for treatment.

Crane manufacturers often use flame correction and stress bar correction, however, this requires removing the main beam of the crane and shipping it back to the manufacturer for repairs.

This also reminds double-girder 60 ton overhead crane operators not to overload or overload operations, as safety problems are very serious. Therefore, it is recommended that users install an overload controller when installing a double-girder bridge crane to send an overload signal when overloaded.

Steel structure modification: According to the equipment conditions, the main beam can be modified by the flame correction method, and the main beam is reinforced with steel plates. In order to reduce the welding deformation of the main beam during the construction process, after spot welding and positioning of the steel plate, symmetrical intermittent welding is performed on both sides. The welding seam is welded first and then the welding seam is welded down, thereby improving the stiffness and strength of the main beam to meet the application requirements.

The deflection data of the crane directly reflects the usage of the main beam. Users should strictly follow the operating procedures of the equipment to reduce damage to the equipment. Through detection, hidden dangers of the equipment can be discovered in time and dealt with.