A telescopic compensation device for bridge cables

Abstract

The invention discloses a bridge crossing cable expansion and contraction compensation device. The device comprises a fixed portion and a movable portion which are arranged on two sides of a bridge seam respectively, the fixed portion comprises a support, the movable portion comprises one section of rail, a pulley and two groups of parallelogram four-bar mechanisms sequentially arranged from front to back, the rail is double tracks in interval arrangement, the pulley is supported on the rail to reciprocate along the rail, a knuckle device is arranged between the fixed portion and the movable portion, and one end of the knuckle device is connected onto the fixing portion while the other end thereof is connected with the pulley on the movable portion. By the aid of the compensation mode that a cable moves along movement of the parallelogram four-bar mechanisms, the bridge crossing cable expansion and contraction compensation device is simple structure and firm in architecture, the cable and the architecture are free of relative movement, and the whole device is stable in operation and capable of achieving full compensation to expansion and contraction of the cable.

Description

technical field [0001] The invention relates to a cable telescopic compensation device, in particular to a bridge cable telescopic compensation device. Background technique [0002] The ambient temperature of the bridge and the external load conditions such as the operation of vehicles on it, wind, and earthquakes will cause the bridge's box girder to expand and deform, so that the cables laid on the bridge will also undergo expansion and deformation. If the expansion and contraction of the cable is not absorbed and compensated, the cable will be bent or subjected to excessive tension due to excessive bending. If this happens repeatedly, it will cause the cable to break. Therefore, it is necessary to compensate for the expansion and contraction of the cable. The compensation currently used is to lay the cable in a serpentine shape on the bridge to cope with the expansion and contraction of the bridge. Install a telescopic compensation device to absorb the ca...

AI Technical Summary

Problems solved by technology

However, the use of horizontal serpentine laying compensation, on the one hand, the compensation amount is limited, on the other hand, because the box girder of the bridge not only expands and deforms along the horizontal direction of the bridge body, but also causes vertical misalignment or kinks between the girder boxes, so the horizontal Compensation fundamentally solves the cable telescopic problem; at the same time, the installation of the existing bridge power cable telescopic compensation device is relatively complicated, takes up a large installation space of the bridge, and makes cable laying difficult.

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