Displacement self-adaptive noise reduction telescopic device

Abstract

The utility model discloses a displacement self-adaptive noise reduction telescopic device. A comb plate expansion device is one of bridge expansion devices which are most widely applied. The device comprises a large toothed plate and a small toothed plate, wherein the large toothed plate and the small toothed plate correspond to each other in a staggered manner along the horizontal direction and are arranged in parallel; a base is arranged below the large toothed plate; a high-damping support and a floating bounce spring are arranged between the large toothed plate and the base; the high-damping support is connected with the large toothed plate through an anchor bolt; the floating bounce spring comprises a T-shaped bolt, a bottom plate of the T-shaped bolt is rectangular, a round stud is arranged on the bottom plate, and a threaded hole is formed in the stud. The T-shaped bolt penetrates through the base, the stud is sleeved with the belleville spring and the floating gasket, and the belleville spring and the floating gasket are arranged between the T-shaped bolt and the base. And the T-shaped bolt is connected with the large toothed plate through an anchor bolt. The large toothed plate is prevented from tilting due to rotation of the beam end, so that the large toothed plate is tightly attached to the beam end, and the safety of a bridge is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the technical field of bridge expansion joints, specifically relating to a displacement adaptive noise reduction expansion joint. Background Technology

[0002] The toothed plate expansion joint is one of the most widely used bridge expansion joint devices. It's a type of expansion joint device used in bridges to control the deformation and displacement of the bridge during expansion and contraction. It consists of two upper and lower metal toothed plates and an expansion joint material in between. During bridge operation, factors such as temperature changes and load effects cause expansion and contraction deformation. The toothed plate expansion joint, through the interlocking and sliding between the upper and lower toothed plates and the elastic deformation of the expansion joint material, allows the bridge to freely expand and contract within a certain range while maintaining structural stability and safety.

[0003] The drawbacks of the comb plate telescopic device are also obvious. The comb plate can warp due to beam end rotation, and the bolts can break due to vehicle impact, causing the comb plate to fall off. Other issues include loose nuts, protruding bolts, and comb plate sagging, all of which affect traffic safety. Existing solutions include an anti-warping leg device to address the problem of the comb plate head warping. This device consists of a housing and bolts, stainless steel plates, PTFE plates, pads, and a helical spring housed inside the housing. The tension generated by the pre-deformation of the comb plate is transmitted to the spring through the bolt heads, then to the housing through the PTFE and stainless steel plates on the pads, and finally to the beam through the steel reinforcement and concrete outside the housing. However, this solution uses a helical spring, which has insufficient stiffness, excessive displacement, a high risk of fatigue fracture, and poor overall anti-warping effect. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a displacement adaptive noise reduction telescopic device. The high-damping support under the toothed plate keeps the large toothed plate in a horizontal state at all times, and the floating anti-bounce spring is always in a tensile state to prevent the large toothed plate from tilting due to the rotation of the beam end, so that the large toothed plate is tightly attached to the beam end and the anti-tilting effect is good.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] 1. A displacement adaptive noise reduction telescopic device, comprising a large toothed plate and a small toothed plate, wherein the large toothed plate and the small toothed plate are staggered and parallel to each other along the horizontal direction;

[0007] A base is provided below the large toothed plate; a high-damping support and a floating anti-rebound spring are provided between the large toothed plate and the base; the high-damping support and the large toothed plate are connected by anchor bolts; the floating anti-rebound spring includes a T-bolt, the base plate of which is rectangular, and a circular stud is provided on the base plate, with a threaded hole inside the stud; the T-bolt passes through the base, and a butterfly spring and a floating washer are sleeved on the stud, which are located between the T-bolt and the base; the T-bolt and the large toothed plate are connected by anchor bolts.

[0008] Furthermore, a stainless steel sliding plate, a stainless steel sliding plate liner, and a high-damping rubber pad are sequentially arranged below the large toothed plate and the small toothed plate.

[0009] Furthermore, L-shaped protective angle steels are provided at the bottom of the high-damping rubber pad and the tail of the small toothed plate, and the stainless steel slide plate, stainless steel slide plate liner, high-damping rubber pad and small toothed plate are connected by anchor bolts.

[0010] Furthermore, a waterproofing system is installed beneath the toothed plate.

[0011] Furthermore, the base is provided with a stiffening plate at the rear and an anchor ring at the bottom.

[0012] Furthermore, a rubber sealing strip is provided on the contact surface between the tail of the large toothed plate and the base.

[0013] Furthermore, a rubber sealing strip is provided at the contact surface between the tail of the small toothed plate and the protective angle steel.

[0014] Furthermore, the anchor bolt location is equipped with a dual protective measure of wedge-shaped self-locking washers and epoxy resin sealing.

[0015] The beneficial effects of this utility model are:

[0016] 1) The toothed plate of this utility model is provided with a floating anti-rebound spring and a high-damping support below it; when the beam rotates vertically, the high-damping support rotates and deforms, so that the toothed plate always remains horizontal; the floating anti-rebound spring is always under tension, preventing the toothed plate from tilting due to the rotation of the beam end, so that the toothed plate is tightly attached to the beam end, ensuring the safety of the bridge.

[0017] 2) The lower part of both the large and small tooth plates of this utility model has high damping rubber. The rubber has compression stiffness and damping energy dissipation characteristics. The wheel can smoothly transition from asphalt concrete to the device, greatly reducing noise. After the wheel leaves the telescopic device, the damping rubber can quickly attenuate free vibration, reducing noise.

[0018] 3) The bolt anchoring point of this utility model adopts a double protection of wedge-shaped self-locking washer + epoxy resin sealing. The wedge locking principle and elastic effect are combined to effectively prevent rotation and loosening caused by nut rotation, settlement and loosening. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the longitudinal section structure of the telescopic device of this utility model;

[0020] Figure 2 This is a top view of the structure of this utility model;

[0021] In the diagram, 10 is the large toothed plate; 11 is the small toothed plate; 20 is the floating anti-bounce spring; 30 is the anchor bolt; 40 is the high-damping support; 50 is the base; 60 is the waterproof system; 70 is the high-damping rubber pad; 71 is the stainless steel skateboard liner; 72 is the stainless steel skateboard; and 80 is the protective angle steel. Detailed Implementation

[0022] The present invention will now be described in detail with reference to specific embodiments.

[0023] like Figure 1 , 2 As shown, this utility model includes a large toothed plate 10 and a small toothed plate 11. The large toothed plate 10 and the small toothed plate 11 are arranged in a staggered and parallel manner along the horizontal direction; a waterproof system 60 is provided below the toothed plates. The large toothed plate 10 and the small toothed plate 11 provide a continuous support surface for the wheels, making the vehicle travel more smoothly.

[0024] A base 50 is provided below the large toothed plate 10. The base 50 has a stiffening plate at its tail and an anchor ring at its bottom. A high-damping support 40 and a floating rebound spring 20 are provided between the toothed plate 10 and the base 50. The high-damping support 40 is connected to the large toothed plate 10 by anchor bolts 30. The floating rebound spring 20 includes a T-bolt. The base plate of the T-bolt is rectangular and has a circular stud with a threaded hole inside. The T-bolt passes through the base 50. A butterfly spring and a floating washer are fitted on the stud. The butterfly spring and the floating washer are located between the T-bolt and the base 50. The butterfly spring has high stiffness and good fatigue performance. The T-bolt and the large toothed plate 10 are connected by anchor bolts 30.

[0025] When the beam rotates vertically, the high-damping support undergoes rotational deformation, keeping the large toothed plate horizontal at all times; the floating anti-rebound spring is always under tension, preventing the large toothed plate from tilting due to the rotation of the beam end, and keeping the large toothed plate tightly attached to the beam end to ensure the safety of the bridge.

[0026] Below the large toothed plate 10 and the small toothed plate 11, a stainless steel sliding plate 72, a stainless steel sliding plate liner 71, and a high-damping rubber pad 70 are arranged sequentially. L-shaped protective angle steels 80 are provided at the bottom of the high-damping rubber pad 70 and at the tail of the small toothed plate 11. The stainless steel sliding plate 72, the stainless steel sliding plate liner 71, the high-damping rubber pad 70, and the small toothed plate 11 are connected by anchor bolts 30.

[0027] A rubber sealing strip 81 is provided on the contact surface between the tail of the large toothed plate 10 and the base 50. A rubber sealing strip 81 is also provided on the contact surface between the tail of the small toothed plate 11 and the protective angle steel 80.

[0028] The anchor bolts at position 30 are equipped with a dual protective measure of wedge-shaped self-locking washers and epoxy resin sealing. The wedge-shaped self-locking washers, combining the wedge-shaped locking principle with elasticity, effectively prevent rotation and loosening caused by nut rotation, settlement, and loosening. The epoxy resin sealing of the nut further improves reliability, thereby increasing the service life and safety of the expansion joint and ensuring the safety of the bridge.

[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "join," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The content of this utility model is not limited to the embodiments listed. Any equivalent modifications made by those skilled in the art to the technical solution of this utility model after reading this utility model specification shall be covered by the claims of this utility model.

Claims

1. A displacement adaptive noise reduction telescopic device, characterized in that: It includes a large toothed plate (10) and a small toothed plate (11), wherein the large toothed plate (10) and the small toothed plate (11) are staggered and parallel to each other in the horizontal direction; A base (50) is provided below the large toothed plate (10); A high-damping support (40) and a floating anti-rebound spring (20) are provided between the large toothed plate (10) and the base (50); the high-damping support (40) and the large toothed plate (10) are connected by anchor bolts (30); The floating anti-bouncing spring (20) includes a T-bolt, the base plate of the T-bolt is rectangular, a circular stud is provided on the base plate, and a threaded hole is provided inside the stud; the T-bolt passes through the base (50), and a butterfly spring and a floating washer are sleeved on the stud, and the butterfly spring and the floating washer are located between the T-bolt and the base (50); the T-bolt and the large toothed plate (10) are connected by anchor bolts (30).

2. The displacement adaptive noise reduction telescopic device according to claim 1, characterized in that: Below the large toothed plate (10) and the small toothed plate (11) are arranged a stainless steel sliding plate (72), a stainless steel sliding plate liner (71), and a high-damping rubber pad (70).

3. The displacement adaptive noise reduction telescopic device according to claim 2, characterized in that: The bottom of the high-damping rubber pad (70) and the tail of the small toothed plate (11) are provided with L-shaped protective angle steel (80). The stainless steel sliding plate (72), the stainless steel sliding plate liner (71), the high-damping rubber pad (70) and the small toothed plate (11) are connected by anchor bolts (30).

4. The displacement adaptive noise reduction telescopic device according to claim 3, characterized in that: A waterproofing system (60) is installed under the toothed plate.

5. The displacement adaptive noise reduction telescopic device according to claim 4, characterized in that: The base (50) has a stiffening plate at the rear and an anchor ring at the bottom.

6. The displacement adaptive noise reduction telescopic device according to claim 5, characterized in that: A rubber sealing strip (81) is provided on the contact surface between the tail of the large toothed plate (10) and the base (50).

7. The displacement adaptive noise reduction telescopic device according to claim 6, characterized in that: A rubber sealing strip (81) is provided on the contact surface between the tail of the small toothed plate (11) and the protective angle steel (80).

8. The displacement adaptive noise reduction telescopic device according to claim 7, characterized in that: The anchor bolt (30) is provided with a double protective measure of wedge-shaped self-locking washer and epoxy resin sealing.

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