Seamless long-span multidirectional shift comb plate bridge expansion device

Abstract

The invention discloses a seamless long-span multidirectional shift comb plate bridge expansion device which comprises a pair of cantilever comb plate supports in mirror arrangement on the left and right sides, a comb plate and lining plates, wherein the comb-shaped lining plates in mutual sliding contact are arranged between the lower part of the comb plate and the upper parts of the cantilever comb plate supports; an opposite interaction area between the front-end cantilevers of the cantilever comb plate supports on the left and right sides forms a bridging area; and the strip comb plate with a rectangular section comprises a comb, a flexible coupling and a carriage in universal connection with the flexible coupling. A pressure spring for jacking close contact between the lining plates is arranged at the upper part of the front end of the cantilever comb plate support. In the invention, the carriage fills a sunken area between the comb plates; by adopting the building block type cantilever comb plate support monomer structures, vibration of the running vehicle is reduced, the service life of the expansion device is prolonged, and the dustproof effect of the expansion device is improved; and moreover, the monomer structures can be spliced one by one on the spot or can be pre-assembled and positioned in a factory and then transported to the spot for integral mounting.

Description

technical field [0001] The invention relates to a seamless large-span multi-directional displacement comb bridge expansion device, specifically a waterproof, dustproof and shockproof multi-directional displacement comb with a stainless steel support plate and an extended rack in close contact Slab bridge telescopic device. It belongs to the technical field of bridge engineering construction. Background technique [0002] The bridge expansion device is an important connecting part between the beam ends of the road and railway bridges. It plays an important role in the expansion and contraction of the bridge end, waterproof, dustproof, shockproof and other performances. Its quality and performance will directly affect the durability of the entire bridge. , is an important part of road and railway bridge construction. Since the bridge expansion device is installed on the weak part of the bridge deck at the end of the beam, and has been subjected to various natural environment...

AI Technical Summary

Problems solved by technology

Since the bridge telescopic device is installed on the weak part of the bridge deck at the end of the beam, and has been subjected to the erosion of various natural environments, there will be multi-directional displacements such as cold and heat expansion, longitudinal swing, and lateral swing relative torsion during use ( That is, three-way displacement, expansion and rotation) and other issues, especially for super-long-span bridges, because a sufficient length (≥500mm) expansion device is required, the expansion device is often damaged to various degrees, and it is not easy to repair, so Affect the overall durability of the bridge and shorten the uptime of the bridge

[0003] In the prior art, comb-tooth-shaped telescopic devices used for long-span bridges such as figure 1 As shown in the figure, the left and right combs are respectively installed on the left and right end bridges. figure 1 It can be seen that when the amount of shrinkage is large in winter, the recessed area (A and B) between the left and right ends of the comb teeth is relatively long. Uneven force, damage to tires, loud noise and strong vibration

Especially narrower motorcycle or tricycle wheels are easy to get stuck in this place, causing serious traffic accidents

On the other hand, in the prior art, in order to prevent dust and water, the stainless steel liner structure is also used at the lower edge of the comb teeth. However, as time goes by, the liner will warp due to uneven force, and gradually The contact with the lower edge of the comb plate is not good, which affects the dustproof and waterproof effect

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