In order to ensure the safe operation of the jib crane, the jib crane needs to be designed with a variety of safety devices, including a variety of devices such as boom telescopic devices, so, in addition, what is the difference between ordinary and European? The following is a detailed answer for all readers.
The difference between ordinary jib crane and European style:
1. From the perspective of structural form
The main girder of the European-style suspension crane abandons the traditional U-groove and I-beam form. The box-shaped structure is adopted, so that the manufacturing process can be simplified, the deformation size of the structure is easy to control, and the overall effect is more beautiful than the traditional form, compact structure, and reduced self-weight.
2. From the point of view of the connection method
The European-style suspension crane is connected with the end beam with high-strength bolts, which is rigidly connected, while the traditional form is a flexible connection of the pin shaft. However, if the European style has high precision control requirements during production, it is easy to not be able to stress the four fulcrums at the same time.
3. From the point of view of the driving form
The ordinary suspension crane adopts the form of an electric sports car, each lifting point has four wheels, the wheel pressure is more dispersed, the local stress requirements of the I-beam track are small, and each group of sports cars adopts flexible connection, and the wheel pressure is evenly distributed. The European-style suspension crane adopts the form of "crossing the bridge" to realize the drive on both sides, and the wheels are hidden in the end beam, which saves space and can improve the net lifting height of the crane. Both have their own advantages and disadvantages and can be selected according to actual needs.
What are the safety devices of jib cranes:
1. Boom telescopic safety device
When an unexpected accident occurs, the high-pressure hose or oil pipe in the boom telescopic cylinder circuit bursts or is cut off, the balance valve in the hydraulic circuit will play a role to lock the working oil from the lower cavity of the cylinder, so that the crane will retract by itself, so as to ensure the safety of the operation.
2. Boom luffing safety device
When an unexpected accident occurs, the high-pressure hose or oil pipe in the boom luffing cylinder circuit bursts or is cut off, the balance valve in the hydraulic circuit will work to lock the working oil from the lower cavity of the cylinder, so that the boom will not fall, so as to ensure the safety of the operation.
3. Each relief valve in the hydraulic system
Abnormal high pressure in the circuit can be suppressed to prevent damage to the hydraulic oil pump and motor, and to prevent overload.
