Prestressed multidirectional displacement comb plate expansion device

Abstract

The invention discloses a prestressed multidirectional displacement comb plate expansion device, which comprises a sliding toothed plate, a fixed toothed plate, a sealing rubber tape and a plurality of multidirectional displacement mechanisms, wherein the fixed toothed plate and the sliding toothed plate are arranged on stainless steel plates positioned on two bridge plates respectively, and the stainless steel plates are movably connected with the toothed end of the sliding toothed plate and fixedly connected with the fixed toothed plate; the sealing rubber tape is positioned below the two stainless steel plates; the multidirectional displacement mechanism comprises a protective cover, m elastic structures and an anchor bolt; each elastic structure is arranged in the protective cover; and the anchor bolt passes through the elastic structure, one end of the anchor bolt passes through an upper cover plate of the protective cover and is fastened and connected with the sliding toothed plate through a nut, and the other end of the anchor bolt is fixed at the bottom of the elastic structure or a mounting connecting plate at the bottom. The elastic structures are made of steel springs or macromolecular materials. The device has reasonable structure, and solves the problems that the bolt is yielded and sheared and the toothed plates are warped and the like because of multidirectional displacement of the bridge end of the expansion device in the vertical direction, transverse direction, oblique direction and the like.

Description

【Technical field】 [0001] The invention relates to a prestressed anchoring device accessory for prestressed construction, in particular to a bridge telescopic device. 【Background technique】 [0002] At present, there is a widely used telescopic device on bridges—the comb-shaped telescopic device. There are following deficiencies in the telescopic device of this structure: 1. Its sliding tooth plate is directly connected with the beam body with bolts on the bridge deck. To shift. 2. The sliding tooth plate is connected with the beam body by bolts, which is a rigid connection. Under the repeated impact of the wheel load, the bolts are likely to be plastically deformed, causing the tooth plate to loosen, resulting in the failure of the telescopic device. [0003] CN201321598Y utility model patent discloses "a bridge telescopic device with multi-directional displacement". structure to realize the lateral and longitudinal displacement compensation of the telescopic device. The...

AI Technical Summary

Problems solved by technology

There are following deficiencies in the telescopic device of this structure: 1. Its sliding tooth plate is directly connected with the beam body with bolts on the bridge deck. To shift

2. The sliding tooth plate is connected with the beam body by bolts, which is a rigid connection. Under the repeated impact of the wheel load, it is easy to cause plastic deformation of the bolts, causing the tooth plate to loosen, resulting in failure of the telescopic device

The structure of this telescopic device has the following deficiencies: 1. Spherical bearings are set on both sides of the cross-joint plate to support, which will increase the span of the cross-joint plate and increase the thickness of the cross-joint plate. Support, in order to make the movable tooth plate and the fixed tooth plate flush with the gap plate, the movable tooth plate and the fixed tooth plate will need very thick steel plates

Therefore, the cost of the entire telescoping device structure is very high

2. The spherical support, the cross-joint plate and the movable tooth plate are separate structures, which are prone to vibration due to the impact of the wheel load. After repeated impacts, the anchor bolts connected to the beam body will undergo plastic deformation, causing the tooth plate to loosen. , resulting in failure of the telescopic device

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