Self-cleaning low-noise bridge expansion device
Patent Information
- Application Number
- CN202522108783.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-09-11
- Estimated Expiration
- 2035-09-30
AI Technical Summary
[0004]本实用新型的目的在于提供一种自清洁型低噪音桥梁伸缩装置，解决现有技术中的上述背景技术中提到的问题
本实用新型当车辆经过桥梁时，梁体会因荷载作用发生相对的伸缩位移。高弹性体填充于梁体间的伸缩缝中，提供持续的密封作用，防止雨水和杂物直接下落，同时缓冲车辆通过的瞬时冲击。雨水从伸缩缝间隙落下会落入位于梁体下方的自清洁组件的弹性箱体内。箱体内两侧倾斜设置的导流板及其表面的导流槽能将雨水导向箱体中部，加速水流，促使夹杂的泥沙等杂物随水流移动。箱体底部开设的多个弹性孔在正常状态下闭合，防止杂物反向侵入；当箱内积水或受梁体伸缩挤压导致内部水压增大时，弹性孔周缘变形张开，实现快速排水，杂物也随之被冲出。
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Figure CN224741428U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bridge component technology, specifically to a self-cleaning, low-noise bridge expansion joint. Background Technology
[0002] Bridge expansion joints are an important component of bridge structures. Their main function is to accommodate the expansion and contraction of the bridge beam caused by temperature changes, concrete shrinkage and creep, and load effects, ensuring the smoothness and safety of traffic on the bridge deck. Traditional bridge expansion joints, such as modular expansion joints and toothed plate expansion joints, were widely used under specific historical periods and engineering conditions, but some problems remain to be solved in long-term use. From a structural stability perspective, toothed plate expansion joints are prone to trapping sand, gravel, and debris in the gaps between the toothed plates. If not cleaned in time, this can hinder the normal expansion and contraction of the beam. Under temperature changes or vehicle loads, the toothed plates are prone to warping and breakage, not only affecting the smoothness of traffic on the bridge deck but also potentially generating significant impact loads, exacerbating damage to the bridge structure.
[0003] Existing bridge expansion joints often lack sufficient sealing performance, allowing rainwater, mud, garbage, and other debris to easily enter the structure through the gaps in the expansion joints. The long-term accumulation of these debris not only clogs drainage channels, affecting the normal expansion and contraction function of the structure, but also corrodes internal steel components, accelerates the aging and damage of rubber sealing strips, significantly shortens the lifespan of the structure, and increases subsequent maintenance costs and difficulties. Furthermore, the impact and vibration generated when vehicles pass over the expansion joints cause significant noise, affecting driving comfort and negatively impacting the surrounding environment. Therefore, those skilled in the art provide a self-cleaning, low-noise bridge expansion joint to solve the problems mentioned in the background section. Utility Model Content
[0004] The purpose of this invention is to provide a self-cleaning, low-noise bridge expansion joint device to solve the problems mentioned in the background section of the prior art.
[0005] This utility model provides the following technical solution: a self-cleaning, low-noise bridge expansion joint, comprising a beam body, with a high-elasticity body for buffering and sealing between the beam bodies, and concrete blocks fixedly connected to the two adjacent side walls of the beam bodies, with a self-cleaning component for removing debris between the two concrete blocks, and a fixed steel member for fixing a rubber strip inside one of the concrete blocks, with a connecting component and a telescopic rubber strip snapped into the inside of the fixed steel member, and a movable steel member for moving with the beam body snapped into the outer side of the end of the rubber strip away from the fixed steel member, with a buffer component for shock absorption at the upper end of the movable steel member.
[0006] As a preferred embodiment of the above technical solution, the self-cleaning component includes an elastic housing, which is fixedly connected to the lower part of the beams.
[0007] As a preferred embodiment of the above technical solution, the upper ends of the two mutually distant inner walls of the elastic box are fixedly connected with guide plates, and both guide plates are inclined downwards, with multiple guide grooves opened at the upper ends of both guide plates.
[0008] As a preferred embodiment of the above technical solution, an elastic plate is fixedly connected to the upper middle region of the elastic box, and a plurality of elastic holes are arranged in a plurality of ways in the lower middle region of the elastic box.
[0009] As a preferred embodiment of the above technical solution, a fixing plate is fixedly connected to the lower end of the two adjacent side walls of the two concrete blocks, and multiple scrapers are fixedly connected to the two adjacent side walls of the two fixing plates, and the multiple scrapers are staggered, with rubber scraper strips fixedly connected to the lower end of the multiple scrapers.
[0010] As a preferred embodiment of the above technical solution, the buffer assembly includes butterfly springs, which are arranged and fixedly connected to the upper end of the movable steel component. The upper ends of the multiple butterfly springs abut against the lower end of the bridge, and each of the multiple butterfly springs is fitted with a rubber core.
[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention relates to a bridge structure where, when a vehicle passes over the bridge, the beams undergo relative expansion and contraction due to the load. A highly elastic material fills the expansion joints between the beams, providing a continuous seal to prevent rainwater and debris from falling directly, while also cushioning the instantaneous impact of passing vehicles. Rainwater falling through the expansion joints enters the elastic housing of a self-cleaning component located beneath the beams. Inclined guide plates on both sides of the housing and their surface channels direct rainwater to the center of the housing, accelerating the water flow and causing any mixed sediment or debris to move with the water. Multiple elastic holes at the bottom of the housing are normally closed to prevent backflow of debris; however, when water accumulates inside or the internal water pressure increases due to the expansion and contraction of the beams, the periphery of the elastic holes deforms and opens, allowing for rapid drainage and flushing out any debris.
[0012] Based on the aforementioned beneficial effects, this utility model utilizes a fixed plate attached to a concrete block to drive the relative movement of scrapers during the beam's expansion and contraction. Due to the staggered arrangement of the scrapers and the presence of rubber scraper strips at the bottom, when the moving steel component and the fixed steel component experience relative displacement, the scrapers effectively remove accumulated debris adhering to the sides of the opposing component or the relevant area of the elastic box. The scraped debris is carried away by water flow and discharged through the elastic holes, achieving a self-cleaning function. The buffer assembly at the upper end of the moving steel component, through the synergistic action of a disc spring and a built-in rubber core, effectively absorbs and attenuates the vibration and impact energy caused by vehicle loads, significantly reducing noise and ensuring the smooth, quiet, and reliable operation of the expansion joint. Attached Figure Description
[0013] Figure 1 A three-dimensional structural diagram of a self-cleaning, low-noise bridge expansion joint; Figure 2 This is a schematic diagram of the internal structure of a self-cleaning, low-noise bridge expansion joint. Figure 3 This is a schematic diagram of the disassembled structure of the self-cleaning component of a self-cleaning, low-noise bridge expansion joint.
[0014] In the diagram: 1. Beam; 2. Concrete block; 3. High elasticity body; 4. Self-cleaning component; 41. Elastic box; 42. Guide plate; 43. Guide channel; 44. Elastic plate; 45. Elastic hole; 46. Fixing plate; 47. Scraper; 48. Rubber scraper; 5. Fixed steel component; 6. Rubber strip; 7. Moving steel component; 8. Buffer component; 81. Butterfly spring; 82. Rubber core. Detailed Implementation
[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0016] Please see Figure 1 As shown, this utility model provides a technical solution: a self-cleaning, low-noise bridge expansion joint, including a beam 1, with a high elastic body 3 for buffering and sealing between the beams 1, and concrete blocks 2 fixedly connected to the two adjacent side walls of the beams 1, with a self-cleaning component 4 for removing debris between the two concrete blocks 2, and a fixed steel member 5 for fixing a rubber strip 6 inside one of the concrete blocks 2, with the rubber strip 6 for connecting components and expansion snapped inside the fixed steel member 5, and a movable steel member 7 for moving with the beam 1 snapped on the outer side of the end of the rubber strip 6 away from the fixed steel member 5, with a buffer component 8 for shock absorption at the upper end of the movable steel member 7.
[0017] The high-elasticity body 3 is made of high-molecular materials such as polyurethane and is filled in the expansion gap between adjacent beams 1. It serves to buffer vehicle impact, adapt to the expansion and contraction deformation of beam 1, and seal to prevent rainwater and debris from falling.
[0018] As one implementation method in this embodiment, please refer to Figures 2-3 As shown, the self-cleaning component 4 includes an elastic housing 41, which is fixedly connected to the lower part of the beams 1.
[0019] The elastic box 41 is made of a material with certain elasticity and weather resistance. Its top opening is located below the expansion joint of the beam 1. It is used to catch rainwater and small debris falling from the expansion joint and can deform slightly with the expansion and contraction of the beam 1.
[0020] As one implementation method in this embodiment, please refer to Figures 2-3 As shown, the upper ends of the two inner walls of the elastic box 41 that are far apart from each other are fixedly connected with guide plates 42, and both guide plates 42 are inclined downwards. Multiple guide grooves 43 are opened at the upper ends of the two guide plates 42.
[0021] The inclined installation of the guide plate 42 and the guide groove 43 opened on the surface of the guide plate 42 can increase the water flow path, guide the water flow to concentrate and accelerate the flow into the elastic box 41, and at the same time help to carry out the mud, sand and other debris with the water flow.
[0022] As one implementation method in this embodiment, please refer to Figures 2-3 As shown, an elastic plate 44 is fixedly connected to the upper middle region of the elastic box 41, and multiple elastic holes 45 are arranged in a plurality of ways in the lower middle region of the elastic box 41.
[0023] The elastic holes 45 are evenly distributed in the central area of the bottom of the box. These holes can remain closed when there is no water flow or under static load to prevent debris from entering in the opposite direction. When the beam 1 expands, contracts or is compressed, the elastic box 41 will be compressed, and the water pressure will deform the elastic material around the holes, opening the holes to achieve rapid drainage. After the water is drained, the holes will automatically close due to the elasticity of the material.
[0024] As one implementation method in this embodiment, please refer to Figures 2-3 As shown, fixing plates 46 are fixedly connected to the lower ends of the two adjacent sides of the concrete blocks 2. Multiple scrapers 47 are fixedly connected to the two adjacent sides of the fixing plates 46, and the multiple scrapers 47 are staggered. Rubber scraper strips 48 are fixedly connected to the lower ends of the multiple scrapers 47.
[0025] The fixed plate 46 provides a mounting base for the scraper 47. The staggered arrangement of the scraper 47 ensures that during the expansion and contraction of the beam 1, the moving steel component 7 will drive the scraper 47 to move synchronously, thereby scraping one side of the fixed steel component 5. When the moving steel component 7 moves, the fixed steel component 5 moves relative to it, thereby simultaneously scraping one side of the moving steel component 7. The rubber scraper 48 at the bottom is elastic, which can effectively scrape away debris while avoiding hard scratches on the surface of the box. The scraped debris is discharged with the water flow through the elastic hole 45.
[0026] As one implementation method in this embodiment, please refer to Figure 2 As shown, the buffer assembly 8 includes butterfly springs 81, which are arranged and fixedly connected to the upper end of the movable steel component 7. The upper ends of multiple butterfly springs 81 abut against the lower end of the bridge, and a rubber core 82 is sleeved inside each of the multiple butterfly springs 81.
[0027] The disc spring 81 provides the main vertical buffer force, bearing the impact load generated when a vehicle passes over it. The rubber core 82, fitted inside the spring, serves two purposes: guiding and preventing spring instability, and providing additional elastic damping to absorb high-frequency vibration energy, thus achieving the effects of shock absorption and noise reduction. When the moving steel component 7 moves with the beam 1, the buffer assembly 8 works in concert to ensure the smooth transfer of the upper load.
[0028] Working principle: When a vehicle passes over the bridge, the beam 1 will undergo relative expansion and contraction due to the load. A highly elastic material 3 fills the expansion joints between the beams 1, providing a continuous seal to prevent rainwater and debris from falling directly, while also cushioning the instantaneous impact of passing vehicles. Rainwater falling from the expansion joints will enter the elastic box 41 of the self-cleaning component 4 located below the beam 1. The inclined guide plates 42 on both sides of the box and the guide channels 43 on their surfaces will guide the incoming rainwater to the center of the box and accelerate the water flow, causing impurities such as mud and sand to move with the water flow. Multiple elastic holes 45 at the bottom of the box are closed under normal conditions to prevent debris from re-entering; when water accumulates inside the box or the internal water pressure increases due to the expansion and contraction of the beam 1, the periphery of the elastic holes 45 deforms and opens, achieving rapid drainage, and the debris is flushed out.
[0029] During the expansion and contraction of beam 1, the fixed plate 46, fixed to the concrete block 2, drives the scraper 47 to move relative to each other. Because the scraper 47 is staggered and has rubber scraper strips 48 at the bottom, when the moving steel component 7 and the fixed steel component 5 are relatively displaced, the scraper 47 can effectively scrape away accumulated debris adhering to the side of the other component or the relevant area of the elastic box 41. The scraped debris is carried away by the water flow and discharged through the elastic hole 45, achieving a self-cleaning function. The buffer assembly 8 at the upper end of the moving steel component 7, through the synergistic action of the butterfly spring 81 and the built-in rubber core 82, effectively absorbs and attenuates the vibration and impact energy caused by the vehicle load, significantly reducing noise and ensuring the smooth, quiet, and reliable operation of the expansion joint.
[0030] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.
Claims
1. A self-cleaning low-noise bridge expansion joint, characterized by: The system includes a beam (1), with a high elastic body (3) for buffering and sealing between the beams (1). Concrete blocks (2) are fixedly connected to the two side walls of the beams (1) that are close to each other. A self-cleaning component (4) for removing debris is provided between the two concrete blocks (2). A fixed steel member (5) for fixing a rubber strip (6) is provided inside one of the concrete blocks (2). A rubber strip (6) for connecting parts and telescopic is snapped inside the fixed steel member (5). A movable steel member (7) for moving with the beam (1) is snapped on the outer side of the end of the rubber strip (6) away from the fixed steel member (5). A buffer component (8) for shock absorption is provided at the upper end of the movable steel member (7).
2. The self-cleaning, low-noise bridge expansion joint according to claim 1, characterized in that: The self-cleaning component (4) includes an elastic housing (41) which is fixedly connected to the lower part of the beams (1).
3. The self-cleaning, low-noise bridge expansion joint according to claim 2, characterized in that: The upper ends of the two inner walls of the elastic box (41) that are far apart from each other are fixedly connected with guide plates (42), and both guide plates (42) are inclined downwards. Multiple guide grooves (43) are opened at the upper ends of both guide plates (42).
4. The self-cleaning, low-noise bridge expansion joint according to claim 2, characterized in that: An elastic plate (44) is fixedly connected to the upper middle region of the elastic box (41), and a plurality of elastic holes (45) are arranged in the lower middle region of the elastic box (41).
5. The self-cleaning low-noise bridge expansion joint according to claim 1, wherein: The two concrete blocks (2) are fixedly connected to the lower ends of their side walls that are close to each other. Multiple scrapers (47) are fixedly connected to the side walls of the two fixed plates (46) that are close to each other. The multiple scrapers (47) are staggered and the lower ends of the multiple scrapers (47) are fixedly connected to rubber scraper strips (48).
6. The self-cleaning, low-noise bridge expansion joint according to claim 1, characterized in that: The buffer assembly (8) includes a butterfly spring (81), which is arranged and fixedly connected to the upper end of the movable steel component (7). The upper ends of the multiple butterfly springs (81) abut against the lower end of the bridge, and a rubber core (82) is sleeved inside the multiple butterfly springs (81).