Durable noise reducing telescoping device

Abstract

The utility model belongs to telescopic device especially relates to a durable noise reduction type telescopic device. Including telescopic support structure and its rear part's anchoring device, be equipped with water stop structure in expansion joint, telescopic support structure includes the comb tooth board of whole lap in expansion joint surface, the comb tooth board front end comb tooth staggered correspondence, its below is equipped with stainless steel baffle, anchoring device includes the anchoring plate of inner end connection in the comb tooth board rear part, anchoring plate adopts variable cross section anchoring plate, variable cross section anchoring plate includes main part, the bulging part of top and / or middle and / or lower part at least one side fixed in main part, still includes the flexible filling of filling in expansion joint below stainless steel baffle and can with comb tooth board opposite movement take place elastic deformation, the utility model effectively solved the poor anchoring performance, loud noise, easy leakage, poor cold resistance etc. of prior art existing problem, with long service life, good anchoring performance, low noise, good waterproofness, self-cleaning, applicable high and cold high altitude area etc. advantage.

Description

Technical Field

[0001] This utility model pertains to telescopic devices, and more particularly relates to a durable and noise-reducing telescopic device. Background Technology

[0002] The main function of bridge expansion joints is to prevent damage to the ends of the beams on both sides of the expansion joint due to thermal expansion and contraction, and to make the road surface smoother, thus providing a better driving experience. Expansion joints include comb-plate type, modular type, seamless type, etc. Comb-plate expansion joints can accommodate longitudinal displacement of the beams and have matured technically after years of engineering application; however, some problems still exist in their use. The "General Specifications for Design of Highway Bridges and Culverts" (JTG D60-2015) and the "General Technical Conditions for Highway Bridge Expansion Joints" (JT / T 327-2016) stipulate that the service life of expansion joints should not be less than 15 years. However, most projects require multiple maintenance, repairs, or even replacements within their service life. The resulting traffic interruptions not only increase costs but also seriously affect road traffic efficiency and socio-economic benefits. The main reasons for the above problems are as follows: First, the anchoring structure often uses welded steel bars, which have short weld lengths and unstable welding quality; or it uses a single welded steel plate, which slightly increases strength, but there is always a gap between the through-hole and the horizontal steel bar, and concrete is difficult to pour in, forming only a layer of mortar, eventually creating small holes and reducing structural strength. At the same time, the anchoring steel plate only connects to the concrete foundation on two sides, with limited strength and weak pull-out resistance. Second, expansion joints are often subjected to concentrated impacts, and the rubber sealing strip is exposed to the natural environment for a long time, making it susceptible to aging and damage due to factors such as temperature changes. In addition, solid debris can damage the waterstop, affecting the waterproofing effect and shortening the service life of the device. In addition, traditional expansion joints also generate a lot of noise during use, affecting driving comfort. Third, for expansion joints used in some high-altitude and cold regions, the harsh environmental factors place higher demands on the material performance of the expansion joint. Rubber, as a crucial water-collecting component in expansion joints, is more prone to aging and cracking under intense ultraviolet radiation at high altitudes, leading to leaks. Furthermore, chemicals in de-icing agents used on roads in cold regions can come into contact with the rubber, causing it to become brittle, lose elasticity, and accelerate its deterioration. All of these factors significantly reduce the lifespan of expansion joints.

[0003] The applicant did not find any documents that are identical or similar to this utility model in the domestic patent database. Summary of the Invention

[0004] The purpose of this utility model is to provide a durable and noise-reducing telescopic device. It optimizes the structure of the anchoring device and adopts protective measures above the rubber sealing strip to improve the protection and cold resistance of the rubber sealing strip, while also effectively reducing noise.

[0005] The overall technical concept of this utility model is: A durable, noise-reducing expansion joint includes an expansion support structure. The rear of the expansion support structure is equipped with an anchoring device for connecting to the foundations on both sides of the expansion joint. The expansion joint contains a water-stopping structure to prevent foreign objects from entering. The expansion support structure includes a comb-tooth plate integrally overlapping the surface of the expansion joint. The comb teeth at the front end of the comb plate are staggered and correspond to each other. A stainless steel partition is located below the comb plate to allow it to move relative to each other along a plane. The anchoring device includes an anchoring plate whose inner end is connected to the rear of the comb plate. The anchoring plate is a variable cross-section anchoring plate, comprising a main body, bulges fixed to at least one side of the top and / or middle and / or lower part of the main body, and a flexible filler that fills the expansion joint below the stainless steel partition and can elastically deform as the comb plate moves towards each other.

[0006] It should be noted that the main functions of flexible filler are twofold: first, to enhance the protection of the upper part of the rubber sealing strip, forming a double-layer waterproof system, extending the maintenance-free period of the rubber sealing strip, and preventing rainwater, snowmelt, or ice from entering the expansion joint and damaging the waterstop; second, to fill the cavity below the comb plate, effectively attenuating and reducing the generation and propagation of noise. While meeting the requirements for the use of flexible filler, the material selection for flexible filler should meet corresponding requirements in terms of technical parameters or performance such as tensile strength, elongation at break, surface drying time, complete drying time, acid and alkali resistance, and ozone resistance, to further adapt to the needs of use in harsh environments such as high-altitude and cold regions.

[0007] The specific technical concept of this utility model includes: To improve the overall anti-detachment effect of variable cross-section anchor plates from the concrete structure, the preferred technical implementation is that horizontal reinforcement bars connect adjacent variable cross-section anchor plates.

[0008] The main function of the bulge is to increase the contact area between the variable cross-section anchor plate and the beam ends or bridge abutment concrete structure on both sides of the expansion joint, thereby improving the friction and pull-out resistance between the plate and the concrete structure. The preferred technical means is that the bulge is located in the middle and / or lower part of the main body.

[0009] A more preferred technical implementation is that the bulge is located on both sides of the middle and / or lower part of the main body.

[0010] To facilitate the assembly between the bulge and the main body, a preferred technical approach is to use welding to connect the adjacent parts of the bulge and the main body.

[0011] To facilitate the installation of flexible filler and the fabrication of expansion joints, a preferred technical implementation is that the flexible filler is installed on a bracket within the expansion joint, and the outer side of the bracket is fixed to the expansion support structure and / or anchoring device.

[0012] A more preferred technical implementation is that the bracket includes an upright plate and a bottom plate, with the outer side and top of the upright plate fixed to the lower surface of the variable cross-section anchor plate and the comb plate, and the outer side and top of the bottom plate fixed to the bottom of the upright plate and the side of the variable cross-section anchor plate.

[0013] To facilitate the removal of solid debris from the gaps between the comb plates during relative movement and ensure the normal operation of the telescopic device, a preferred technical means is that the root and / or tip of the comb plate is one of a sloping surface, an arc surface, a smooth concave surface, or a combination thereof.

[0014] To further improve the corrosion resistance of the comb plate, the outer surface of the comb plate is coated with a weather-resistant anti-corrosion coating.

[0015] To facilitate the installation, maintenance, and replacement of the waterstop structure, as well as the fabrication of the expansion joint, the preferred technical approach is to fix the two ends of the waterstop structure to the pre-reserved reinforcing bars or steel formwork in the foundation on both sides of the expansion joint.

[0016] To facilitate the rapid drainage of rainwater or melted snow from the water-stopping structure, a water collector is installed at the bottom of the structure to hold the water.

[0017] In the description of this invention, the terms "front end", "rear end", "middle part", "lower part", "both sides", "lower surface", "outer end", "inner end", "both ends", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this utility model.

[0018] The technological advancements achieved by this utility model are as follows: 1. The variable cross-section anchor plate structure design adopted in this utility model has two advantages. First, the structure of the bulge can be implemented in various ways as needed, which increases the contact area between the variable cross-section anchor plate and the concrete structure of the beam end or abutment on both sides of the expansion joint, thereby improving the friction and pull-out resistance between the plate and the concrete structure. Second, the use of transverse reinforcement fixed between adjacent variable cross-section anchor plates not only ensures the installation quality of the expansion device, but also further improves the overall pull-out resistance of the device, effectively preventing the expansion device from coming out of the concrete structure.

[0019] 2. The flexible filling and water-stop structure constitute a dual water-stop structure. Firstly, it enhances the protection of the upper part of the water-stop structure, forming a double-layer waterproof system, extending the maintenance-free period of the water-stop structure, and preventing rainwater, snowmelt, or ice from entering the expansion joint and damaging the water-stop strip. Secondly, it fills the cavity below the comb-tooth plate, effectively attenuating and reducing the generation and propagation of noise. Thirdly, in conjunction with the water collector at the end of the water-stop structure, it can prevent sewage pollution and erosion of the facilities and structures below the beam. Fourthly, the materials selected for the flexible filling are suitable for harsh environments such as high-altitude and cold regions, resisting corrosion of the internal structure caused by external factors such as de-icing agents.

[0020] 3. The structural design of the tooth root and / or tooth tip of the comb plate as a sloping surface, arc surface or smooth concave surface is conducive to the removal of solid debris in the gap between the teeth when the comb plate moves relative to each other, so as to ensure the normal operation of the telescopic device.

[0021] 4. The stainless steel partition on the lower surface of the comb plate can separate solid and liquid debris from road debris, preventing solid debris from entering the cavity under the comb plate. Attached Figure Description

[0022] The accompanying drawings of this utility model are as follows: Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0023] Figure 2 yes Figure 1 Top view.

[0024] Figure 3 This is a schematic diagram of the variable cross-section anchor plate used in Example 1.

[0025] Figure 4 This is a schematic diagram of the variable cross-section anchor plate used in Example 2.

[0026] Figure 5 This is a schematic diagram of the variable cross-section anchor plate used in Example 3.

[0027] Figure 6 This is a schematic diagram of the variable cross-section anchor plate used in Example 4.

[0028] Figure 7 This is a schematic diagram of the connection structure between the water collector and the rubber sealing strip.

[0029] Figure 8 This is a diagram showing the usage state of this utility model.

[0030] Figure 9 This is a perspective view of the present invention.

[0031] The reference numerals in the attached figures are as follows: 1. Telescopic support structure: 1A. Comb plate; 1B. Vertical plate; 1C. Base plate; 1D. Stainless steel partition; 2. Anchoring device; 2A. Variable cross-section anchoring plate; 2A1. Main body; 2A2. Expansion part; 2B. Horizontal rib; 3. Water-stopping structure; 3A. Water collector; 4. Flexible filling. Detailed Implementation

[0032] The embodiments of this utility model are further described below with reference to the accompanying drawings, but are not intended to limit the scope of this utility model. The protection scope of this utility model is determined by the contents of the claims, and any equivalent technical means substitutions made based on the description do not depart from the protection scope of this invention. Example 1

[0033] The overall structure of this embodiment is as follows: Figure 1 , 2 As shown in Figures 3, 7, 8, and 9, a durable noise-reducing expansion joint includes an expansion support structure 1. The expansion support structure 1 has an anchoring device 2 at its rear for connecting to the foundations on both sides of the expansion joint. The expansion joint has a water-stopping structure 3 to prevent foreign objects from entering. The expansion support structure 1 includes a comb plate 1A integrally overlapped on the surface of the expansion joint. The comb teeth at the front end of the comb plate 1A are staggered. A stainless steel partition 1D is provided below the comb plate 1A to allow it to move relative to the plane. The anchoring device 2 includes an anchor plate whose inner end is connected to the rear of the comb plate 1A, and a transverse rib 2B welded between adjacent variable cross-section anchor plates 2A. The anchor plate is a variable cross-section anchor plate 2A, which includes a main body 2A1 and bulges 2A2 symmetrically welded to the lower sides of the main body 2A1. The bulges 2A2 have a rigid cuboid structure. A flexible filler 4 is filled in the expansion joint below the stainless steel partition 1D and can elastically deform as the comb plates 1A move towards each other.

[0034] The flexible filler 4 is prepared using polymer materials. The polymer materials have the following requirements in terms of technical parameters or technical performance, such as tensile strength, elongation at break, surface drying time, actual drying time, acid and alkali resistance, and ozone resistance.

[0035]

[0036] The flexible filler 4 is located on a bracket positioned opposite to the expansion joint, and the outer side of the bracket is fixed to the expansion support structure 1 and / or the anchoring device 2. The bracket includes a vertical plate 1B and a bottom plate 1C. The outer side of the vertical plate 1B is fixed to the lower surface of the variable cross-section anchoring plate 2A and the comb plate 1A, and the outer side and top of the bottom plate 1C are fixed to the bottom of the vertical plate 1B and the side of the variable cross-section anchoring plate 2A, respectively.

[0037] The tooth roots and tooth tips of the comb plate 1A are arc-shaped surfaces or smooth concave surfaces.

[0038] The outer surface of the comb plate 1A is covered with a weather-resistant and corrosion-resistant coating.

[0039] The two ends of the water-stop structure 3 are fixed to the reserved steel bars or steel formwork in the foundation on both sides of the expansion joint, and the bottom of the water-stop structure 3 is provided with a water collector 3A for accommodating the water. Example 2

[0040] In this embodiment, the overall structure of the variable cross-section anchor plate 2A is as follows: Figure 4 The difference between this embodiment and Embodiment 1 is that the variable cross-section anchor plate 2A includes a main body 2A1 and bulges 2A2 symmetrically welded to the lower sides of the main body 2A1. The bulges 2A2 adopt a rigid columnar structure with a semi-circular longitudinal section. The rest is the same as in Embodiment 1. Example 3

[0041] In this embodiment, the overall structure of the variable cross-section anchor plate 2A is as follows: Figure 5 The difference between this embodiment and Embodiment 1 is that the variable cross-section anchor plate 2A includes a main body 2A1 and bulges 2A2 symmetrically welded to the lower sides of the main body 2A1. The bulges 2A2 adopt a channel steel structure with a V-shaped longitudinal section. The rest is the same as in Embodiment 1. Example 4

[0042] In this embodiment, the overall structure of the variable cross-section anchor plate 2A is as follows: Figure 6 The difference between this embodiment and Embodiment 1 is that the variable cross-section anchor plate 2A includes a main body 2A1 and bulges 2A2 symmetrically welded to the lower sides of the main body 2A1. The bulges 2A2 adopt a rigid columnar structure with a trapezoidal longitudinal section. The rest is the same as in Embodiment 1.

Claims

1. A durable and noise-reducing expansion joint, comprising an expansion support structure (1), wherein the expansion support structure (1) is provided with an anchoring device (2) at the rear for connecting with the foundations on both sides of the expansion joint, and a water-stopping structure (3) is provided inside the expansion joint to prevent foreign objects from entering its interior; the expansion support structure (1) comprises a comb plate (1A) integrally overlapped on the surface of the expansion joint, the comb teeth at the front end of the comb plate (1A) being staggered and corresponding, and a stainless steel partition plate (1D) is provided under the comb plate (1A) to allow it to move relative to each other along the plane; the anchoring device (2) comprises an anchoring plate whose inner end is connected to the rear of the comb plate (1A); characterized in that The anchor plate adopts a variable cross-section anchor plate (2A), which includes a main body (2A1), a bulge (2A2) fixed to at least one side of the top and / or middle and / or lower part of the main body (2A1), and a flexible filler (4) filled in the expansion joint below the stainless steel partition (1D) and capable of elastic deformation as the comb plate (1A) moves towards each other.

2. The durable noise-reducing telescopic device according to claim 1, characterized in that... A transverse bar (2B) connects adjacent variable cross-section anchor plates (2A).

3. The durable noise-reducing telescopic device according to claim 1, characterized in that... The bulge is located in the middle and / or lower part of the main body (2A1).

4. The durable noise-reducing telescopic device according to claim 1, characterized in that... The bulge (2A2) and the main body (2A1) are connected by welding at their adjacent points.

5. The durable noise-reducing telescopic device according to claim 1, characterized in that... The flexible filler (4) is located on the bracket set opposite to the expansion joint. The outside of the bracket is fixed to the expansion support structure (1) and / or the anchoring device (2). The flexible filler (4) is made of polyurethane polymer material.

6. The durable noise-reducing telescopic device according to claim 5, characterized in that... The bracket includes an upright plate (1B) and a bottom plate (1C). The outer side of the upright plate (1B) is fixed to the lower surface of the variable cross-section anchor plate (2A) and the comb plate (1A). The outer side and top of the bottom plate (1C) are fixed to the bottom of the upright plate (1B) and the side of the variable cross-section anchor plate (2A), respectively.

7. The durable noise-reducing telescopic device according to claim 1, characterized in that... The tooth root and / or tooth tip of the comb plate (1A) is one of a ramp surface, an arc surface, a smooth concave surface, or a combination thereof.

8. The durable noise-reducing telescopic device according to any one of claims 1, 6, or 7, characterized in that... The outer surface of the comb plate (1A) is covered with a weather-resistant and corrosion-resistant coating.

9. The durable noise-reducing telescopic device according to claim 6, characterized in that... The water-stopping structure (3) is fixed at both ends to the reserved steel bars or steel formwork in the foundation on both sides of the expansion joint.

10. The durable noise-reducing telescopic device according to claim 1 or 9, characterized in that... The bottom of the water-stopping structure (3) is provided with a water collector (3A) for accommodating water.

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