Bridge girder erection machine

Abstract

The invention discloses a bridge girder erection machine. A rear supporting leg, a front supporting leg and an auxiliary supporting leg are raised by adopting a double oil cylinder supporting assemblyrespectively, and correction assemblies are arranged on the rear supporting leg, the front supporting leg and the auxiliary supporting leg respectively; the corrosion assemblies are used for being responsible for monitoring synchronous balance movement when the double oil cylinder supporting and raising assemblies are raised so that asymmetrical and unbalanced raising is prevented when the doubleoil cylinder supporting and raising assemblies are raised. According to the bridge girder erection machine disclosed by the invention, the supporting legs are raised by adopting double oil cylinders,the raising force is large, the erection of relatively heavy bridges can be realized, the correction assemblies are arranged on the double oil cylinder supporting assemblies, synchronous raising of main girders or nose girders during raising can be guaranteed, the balance and stress uniformity during the raising process are guaranteed, the stress asymmetry of the bridge girder erection machine during girder erection is prevented, the safety reliability of the bridge girder erection machine is guaranteed, and the bridge girder erection machine plays preferable monitoring and safety guarantee roles for the operation of large-scale bridge girder erection machines.

Description

technical field [0001] The invention relates to a bridge erecting machine, which belongs to the technical field of bridge construction auxiliary equipment. Background technique [0002] The beam lifting machine is a kind of gantry crane specially designed for bridge construction. The beam lifting machine is mainly composed of an assembled main beam, outriggers, crown blocks, etc. The components are connected by pin shafts and high-strength bolts, which is easy to disassemble and transport. Compared with ordinary gantry cranes, it is convenient and quick to install, economical and practical. It is suitable for Frequently mobile road and bridge construction units. The current beam lifting machine is generally equipped with outrigger walking, crane walking and crane lifting equipment, which can realize all-round mechanized actions. It is mainly used to lift the prefabricated beam from the beam manufacturing platform to the beam storage platform. It is hoisted from the beam st...

AI Technical Summary

Problems solved by technology

[0003] For large bridges, two oil cylinders are generally used for synchronous jacking when lifting the girder required for bridge erection. However, when the oil cylinders are under control, instability is prone to occur, and this instability can easily lead to When the beam is lifted, there are phenomena such as unbalanced force. If the unbalanced force is serious, it is easy to cause accidents.

According to statistics, at least one-third of beam lifting accidents are caused by unbalanced and asymmetrical forces. However, the current beam lifting machines generally do not have a structure for monitoring and controlling the lifting of the oil cylinder of the supporting legs.

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