Anti-tilting cleaning-free comb plate telescopic device

Abstract

The invention belongs to a telescopic device, and particularly relates to an anti-tilting cleaning-free comb plate telescopic device. The root of the movable comb plate is connected with one side beam end or a bridge abutment, the front portion of the movable comb plate is in lap joint with the expansion joint, the fixed comb plate is opposite to comb teeth of the movable comb plate and fixed to the other side beam end or the bridge abutment, a fixed comb plate base plate is arranged below the lap joint portion of the two comb plates, and a rubber water stop belt is arranged in the expansion joint. A rotating sleeve coaxial with the expansion joint is arranged at the beam end or the bridge abutment on one side of the root of the movable comb plate, a rotating shaft is rotatably matched in the rotating sleeve, the root of the movable comb plate is fixed to the rotating shaft and can rotate along the rotating sleeve, and a corner gap is formed between the lower surface of the root of the movable comb plate and the beam end or the bridge abutment below the movable comb plate. An outlet of the ventilation pipe is located in the lower portion of the movable comb plate and / or the fixed comb plate and faces the space defined by the comb teeth of the movable comb plate and / or the fixed comb plate. The comb plate solves the problem that in the prior art, a toothed plate is prone to upwarp to be damaged, and has the advantages that the toothed plate is not prone to upwarp, and sundries are not prone to accumulation in gaps of the comb plate.

Description

technical field [0001] The invention belongs to a telescopic device, in particular to an anti-lifting and cleaning-free comb tooth plate telescopic device. Background technique [0002] With the deepening of road and bridge traffic construction, as one of the important types of bridge expansion devices, the comb plate expansion device has been widely used due to its low noise and driving comfort. "General Technical Conditions for Highway Bridge Expansion Devices" (JT / T327-2016) puts forward clear requirements for the basic structure, classification, product performance, manufacturing materials and testing methods of comb plate expansion devices. As the use time increases, some disadvantages of the comb telescopic device gradually appear. One is that during use, the movable tooth plate of the ordinary comb telescopic device will warp due to various reasons such as load or settlement, resulting in damage to the tooth plate, increased noise, and even endangering driving safety...

AI Technical Summary

Problems solved by technology

One is that during use, the movable tooth plate of the ordinary comb telescopic device will warp due to various reasons such as load or settlement, resulting in damage to the tooth plate, increased noise, and even endangering driving safety

Second, during the use of comb plate expansion joints, dust and gravel will accumulate in the tooth plate gaps

Gravel and dust will enter the lower part of the tooth plate, causing the tooth plate to be lifted and unable to recover

The third is that the existing anti-lifting comb plate telescopic device adopts the introduction of vertical restraint force to limit the warping, but because of its structural design, gaps cannot be avoided, causing gravel and dust to enter the gap, resulting in the gap being unable to recover

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