Movable span lifting device of vertical lift balance bridge

Abstract

The invention relates to a movable span lifting device of a vertical lift balance bridge. The lifting device comprises a control module, displacement detection modules and lifting mechanisms consisting of a frequency converter, a motor and a winding drum. The lifting mechanisms are four groups and respectively arranged at four corners of the movable span. Span tower frames opposite to each group of lifting mechanism are all provided with one displacement detection module and the output end of each displacement detection module is connected with the input end of the control module. The lifting device is simple in structure, easy for installation and maintenance and high in automation level, can make up a more complicated control system with various control modules which take PLC and microprocessors as cores, and has wide range of application and high cost performance. With four lifting points being raised synchronously in a balanced manner, the lifting device not only can be applied to the ascending or descending of the movable span of the vertical lift bridge, but also can be applied to a large-scale transportation support crane ship for implementing multiunit independent hoisting and hanging operation to thousands of tons of bridges, a large-scale gate unit or a large-scale railway crane control system.

Description

technical field [0001] The invention belongs to the technical field of balanced lifting of movable bridge spans of vertical lifting and opening bridges, in particular to a movable bridge span lifting device of vertical lifting and opening bridges. Background technique [0002] With the development of society, people build many river-crossing bridges on the rivers flowing through the city, but in order to meet the needs of river navigation, these river-crossing bridges use openable bridges, such as: horizontal rotation, vertical rotation Bridges with different opening forms such as vertical lift type and vertical lift type. Among them, vertical lift open bridge has been widely used because of its simple structure, convenient construction and low cost. Early vertical lifting and opening bridges were completely manually operated by operators to lift and lower the movable bridge span, but in order to realize the balanced lifting of the movable bridge span, it was very difficult ...

AI Technical Summary

Problems solved by technology

Strictly speaking, this structure is still a two-point balanced synchronous lifting device. Although its control performance is greatly improved compared with the "electric shaft" lifting device, it can be seen from the figure that the movable bridge spans the two volumes connected by each narrow side. The main shaft of the barrel is rigidly connected, which means that its overall structure is complex and the manufacturing cost is high, and the output shaft of each main motor is long, almost as wide as the opening bridge, and its working torque is large, which requires material requirements for the output shaft of the motor itself. High, the requirements for joints are high, and the concentricity of the shaft is not easy to guarantee

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