Universal seamless grid type telescopic device
The design of the omnidirectional seamless mesh expansion joint solves the problems of high concealment of defects, large safety hazards and high maintenance costs of comb-tooth plate expansion joints. It realizes the self-adjustment and safety improvement of bridge expansion joints, and reduces maintenance costs and construction difficulty.
Patent Information
- Application Number
- CN202520257140.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-02-18
AI Technical Summary
Existing expansion joints in comb plates suffer from problems such as high concealment of defects, significant safety hazards, high maintenance costs, frequent repairs, and difficult construction, and are also prone to causing vehicle accidents.
The device employs a omnidirectional seamless mesh expansion joint, including a mesh expansion panel, expansion joint cover plate, anchor plate, and expansion displacement box. It achieves self-adjustment through a vertical rotation structure and sliding connection, adapting to the balance height difference caused by uneven settlement of the bridge piers and roadbed, reducing noise, and simplifying installation and maintenance.
It enables bridge expansion joints to self-adjust, reduces noise, improves safety and maintenance convenience, reduces maintenance frequency and cost, enhances anchoring strength, and simplifies the construction process.
Smart Images
Figure CN223780702U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of bridge expansion joint technology, and specifically relates to a universal seamless mesh expansion joint device. Background Technology
[0002] Bridge expansion joints, as crucial auxiliary structures of bridges, primarily serve to accommodate bridge deck deformation and are in direct contact with high-speed vehicles. Problems with these joints can severely impact traffic safety. In recent years, toothed expansion joints have been widely adopted; however, significant problems have been observed, such as bolt loosening, abnormal noise, damage to the anchorage zone, and even the toothed plate detaching along with the concrete in the anchorage zone. These issues tend to occur frequently after 3-5 years of operation, requiring frequent repairs. Damage to these joints can easily lead to rollovers and tire blowouts, significantly impacting the safe operation of highways. Therefore, it is necessary to discuss the main defects and causes of toothed expansion joints in bridges and propose effective repair measures.
[0003] Analysis reveals the following disadvantages of ordinary comb-tooth plate expansion joints:
[0004] 1. The damage is highly concealed, posing a significant safety hazard. During later maintenance, it is difficult for maintenance technicians to determine whether the concrete in the anchorage area under the comb plate is damaged. If the concrete in the anchorage area around the bolts and expansion joints is intact, it is easy to misjudge that the technical condition of the expansion joint is good, leading to further development of the damage and the entire comb plate and the concrete in the anchorage area falling off, causing the vehicle to overturn.
[0005] 2. Roadside garbage is difficult to clean up on its own, and if maintenance is inadequate, garbage removal becomes even more difficult.
[0006] 3. High post-construction maintenance costs, frequent repairs, and difficult construction. After the project is handed over and enters the trial operation period, many defects begin to appear in the expansion joints of the comb plate. Frequent repairs lead to increased operating costs, and repairs are difficult. The maintenance personnel are highly skilled, and professional tools are needed to open the comb plate to check the concrete damage in the anchorage area. Repairs are difficult and the defects are hard to eradicate after repairs, resulting in a short service life. Utility Model Content
[0007] In view of this, the purpose of this utility model is to address the shortcomings of the existing technology by providing a universal seamless mesh-type telescopic device that can adjust its displacement, expansion, contraction, and sliding according to weather changes. The vertical rotation structure can adapt to the balance height difference caused by uneven settlement of the bridge piers and roadbed, and reduce the adverse effects of partial structural settlement of two adjacent beams. It is simple to install, easy to construct, and convenient to maintain.
[0008] To achieve the above objectives, the present invention adopts the following technical solution:
[0009] The omnidirectional seamless mesh telescopic device includes a mesh telescopic panel, a cover seam telescopic support plate, an anchoring plate, and a telescopic displacement box. The telescopic displacement box is a sliding groove structure with an opening on the side. The mesh telescopic panel is placed on top of the cover seam telescopic support plate, and the left and right ends of the mesh telescopic panel are respectively connected to the anchoring plate and the telescopic displacement box. The upper and lower surfaces of the cover seam telescopic support plate are covered with supporting sliding plates. One end of the cover seam telescopic support plate is vertically rotatably connected to the anchoring plate, and the other end of the cover seam telescopic support plate is inserted into the telescopic displacement box and slidably connected to it.
[0010] To better realize this utility model, the above structure is further optimized. The telescopic displacement box includes an upper cover plate, a lower support plate and a rear baffle. The upper cover plate and the lower support plate are respectively connected to the upper and lower sides of the rear baffle. The cover seam telescopic support plate is inserted between the upper cover plate and the lower support plate and slidably connected with them.
[0011] To better realize this utility model, the above structure is further optimized. Anchor bolts are vertically arranged on the lower support plate. The anchor bolts pass upward through the cover seam expansion support plate, and the cover seam expansion support plate is provided with holes to accommodate the left and right movement of the anchor bolts.
[0012] To better realize this utility model, the above structure is further optimized by providing waterproof seals at the bottom of the mesh telescopic panel and the top of the lower support plate.
[0013] To better realize this utility model, the above structure is further optimized, and the waterproof sealant is a sealing water-stop strip.
[0014] To better realize this utility model, the above structure is further optimized by providing sliding supports at the bottom of the mesh telescopic panel and the top of the lower support plate.
[0015] To better realize this utility model, the above structure is further optimized, and the sliding support is a polytetrafluoroethylene sliding plate.
[0016] To better realize this utility model, the above structure is further optimized. The mesh telescopic panel has a mesh structure formed by connecting trapezoidal telescopic ribs that are wider at the bottom and narrower at the top.
[0017] To better realize this utility model, the above structure is further optimized, and the cover expansion support plate and the anchor plate are rotatably connected by a vertical steering shaft and a steering shaft sleeve.
[0018] To better realize this utility model, the above structure is further optimized, and the supporting slide is a stainless steel slide.
[0019] Compared with the prior art, this utility model has the following advantages:
[0020] This utility model provides a universal seamless mesh-type expansion joint, which is connected to the pre-embedded steel bars on the left and right sides of the bridge beams. It has a fixed end and an expansion end. During long-term use, the universal seamless mesh-type expansion joint panel is integrally connected with the expansion end and the fixed end. The relative sliding between the expansion joint cover plate and the expansion displacement box can adjust the expansion joint according to the weather changes by thermal expansion and contraction. The vertical rotation structure can adapt to the balance height difference caused by the uneven settlement of the bridge piers and roadbed, and reduce the adverse effects of partial structural settlement of two adjacent beams. Vehicles pass through the expansion joint more smoothly and safely. This expansion joint uses an anchor plate instead of the bolt fastening installation of the original comb plate expansion joint, and the anchor plate anchoring is more firm and strong. The mesh design can effectively reduce the noise generated when vehicles pass through. The hidden sealing waterstop effectively eliminates the problems of rubber aging and easy damage. It is simple to install, easy to construct, and convenient to maintain. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the structure of the universal seamless mesh telescopic device of this utility model;
[0023] Figure 2 This is a schematic diagram of the state of the mesh-format telescopic panel of this utility model at high temperature;
[0024] Figure 3 This is a schematic diagram of the state of the mesh-format telescopic panel of this utility model at low temperatures.
[0025] In the picture:
[0026] 1-Mesh-type telescopic panel, 2-Cover seam telescopic support plate, 3-Anchor plate, 4-Telescopic displacement box, 401-Upper cover plate, 402-Lower support plate, 403-Rear baffle, 5-Support sliding plate, 6-Anchor bolt, 7-Waterproof seal, 8-Sliding support, 9-Vertical steering shaft, 10-Steering shaft sleeve. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0028] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0029] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0030] like Figure 1As shown in the schematic diagram, the universal seamless mesh telescopic device provided in this application includes a mesh telescopic panel 1, a cover seam telescopic support plate 2, an anchoring plate 3, and a telescopic displacement box 4. The telescopic displacement box 4 is a sliding groove structure with side openings. The mesh telescopic panel 1 is placed on top of the cover seam telescopic support plate 2, and the left and right ends of the mesh telescopic panel 1 are respectively connected to the anchoring plate 3 and the telescopic displacement box 4. Both the upper and lower surfaces of the cover seam telescopic support plate 2 are covered with supporting sliding plates 5, which are made of stainless steel. The left side of the cover seam telescopic support plate 2 is vertically rotatably connected to the anchoring plate 3, and the cover seam telescopic support plate 2 can swing up and down in the vertical direction to adjust its height. The right side of the cover seam telescopic support plate 2 is inserted into the telescopic displacement box 4 and slidably connected to it. The universal seamless mesh-type expansion joint provided by this utility model has a left anchor plate 3 and a right telescopic displacement box 4 connected to the pre-embedded steel bars of the beams on both sides of the bridge. The left side is the fixed end and the right side is the telescopic end. During long-term use, the universal seamless mesh-type expansion joint panel is integrated with the telescopic end and the fixed end. The mesh-type expansion joint panel 1 automatically expands and contracts. The relative sliding between the cover expansion joint support plate 2 and the telescopic displacement box 4 can be self-adjusted according to the thermal expansion and contraction of the bridge. The width between the bridge expansion joints can be adjusted by sliding left and right, and the height difference can be stably balanced. The left side of the cover expansion joint support plate 2 is vertically rotated and connected to the anchor plate 3, which can adapt to the height difference caused by the uneven settlement of the roadbed and bridge piers, and reduce the adverse effects caused by the partial structural settlement of the two adjacent beams. This expansion joint realizes that the anchor plate replaces the bolt fastening installation of the original comb plate expansion joint. The anchor plate anchoring is more firm and strong, and the installation is convenient and quick, reducing maintenance costs. The amount of metal raw materials used is reduced, and the operating cost is reduced.
[0031] In this embodiment, the telescopic displacement box 4 includes an upper cover plate 401, a lower support plate 402 and a rear baffle 403. The upper cover plate 401 and the lower support plate 402 are respectively connected to the upper and lower sides of the rear baffle 403. The right side of the cover seam telescopic support plate 2 is inserted between the upper cover plate 401 and the lower support plate 402 and slidably connected thereto.
[0032] To prevent the expansion joint support plate 2 from sliding off the expansion displacement box 4, an anchor bolt 6 is vertically installed on the lower support plate 402. The anchor bolt 6 passes upward through the expansion joint support plate 2, and the expansion joint support plate 2 has holes to accommodate the left and right movement of the anchor bolt 6. The anchor bolt 6 is fixedly connected to the concrete of the beam and slab to limit the movement distance of the expansion joint support plate 2 and prevent the expansion joint support plate 2 from sliding off the expansion displacement box 4. On this basis, the holes opened on the support plate 2 ensure that the expansion joint support plate 2 can slide freely left and right with the expansion displacement box 4.
[0033] To improve waterproof sealing performance, waterproof seals 7 are provided on the bottom right side of the mesh telescopic panel 1 and the top of the lower support plate 402. The waterproof seals 7 are sealing waterstop strips. This application effectively avoids the original telescopic device's waterstop strip being exposed to the air for a long time by adopting a concealed multi-seal waterproof system, solving the problems of easy aging, difficulty in replacing leaking water, and high maintenance costs.
[0034] To improve the smoothness of the sliding connection, sliding supports 8 are provided on the bottom right side of the mesh telescopic panel 1 and the top of the lower support plate 402, so that the cover seam telescopic support plate 2 can maintain good sliding performance during long-term use. The sliding support 8 is a polytetrafluoroethylene (PTFE) sliding plate. The low coefficient of friction (μf≤0.08) between the PTFE plate and the stainless steel plate allows the horizontal displacement of the supported components to be unrestricted.
[0035] like Figure 2 and Figure 3 As shown, the internal structure of the mesh-type telescopic panel 1 is a grid structure formed by trapezoidal telescopic ribs that are wider at the bottom and narrower at the top. The trapezoidal design allows for the autonomous clearing of road debris generated by vehicles during bridge stress expansion and contraction, effectively preventing damage to the bridge caused by uncollected debris affecting its expansion and contraction. Furthermore, the mesh structure effectively blocks noise transmission and reduces noise levels during vehicle movement. Additionally, the mesh design provides excellent anti-skid protection during rain and snow, ensuring vehicle safety when crossing the bridge.
[0036] In this embodiment, the expansion joint support plate 2 and the anchor plate 3 are rotatably connected by a vertical steering shaft 9 and a steering shaft sleeve 10. By utilizing the rotatable connection between the expansion joint support plate 2 and the anchor plate 3, the horizontal drop height can be automatically adjusted vertically according to the uneven settlement of the bridge subgrade and piers. Due to the movable connection on the right side of the expansion joint support plate 2, the expansion joint support plate 2 can be rotated slightly vertically, reducing the height difference between two adjacent beams caused by partial structural settlement, making the driving of vehicles safer and more stable.
[0037] Working principle:
[0038] The universal seamless mesh expansion joint provided in this application is installed on both sides of the bridge expansion joint. The left anchor plate 3 and the right expansion displacement box 4 are respectively connected to the embedded steel bars of the beams on both sides of the expansion joint. The left side is the fixed end and the right side is the expansion end. The mesh expansion panel 1 at the top can automatically and elastically expand and contract. The left side of the cover expansion support plate 2 below it adjusts the height difference between the fixed end and the expansion end by rotation control, and the right side of the cover expansion support plate 2 adjusts the width difference between the fixed end and the expansion end by sliding control, thereby controlling and compensating for the width and height of the beams at both ends of the bridge expansion joint.
[0039] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A universal seamless mesh telescopic device, characterized in that: The device includes a mesh telescopic panel (1), a cover seam telescopic support plate (2), an anchor plate (3), and a telescopic displacement box (4). The telescopic displacement box (4) is a sliding groove structure with a side opening. The mesh telescopic panel (1) is set on the top of the cover seam telescopic support plate (2), and the left and right ends of the mesh telescopic panel (1) are respectively connected to the anchor plate (3) and the telescopic displacement box (4). The upper and lower surfaces of the cover seam telescopic support plate (2) are covered with a support slide plate (5). One end of the cover seam telescopic support plate (2) is vertically rotatably connected to the anchor plate (3), and the other end of the cover seam telescopic support plate (2) is inserted into the telescopic displacement box (4) and slidably connected to it. The anchor plate (3) and the telescopic displacement box (4) are respectively connected to the pre-embedded steel bars of the beams on both sides of the bridge. The left side is the fixed end and the right side is the telescopic end. The mesh telescopic panel (1) is integrally connected to the telescopic end and the fixed end.
2. The universal seamless mesh telescopic device according to claim 1, characterized in that: The telescopic displacement box (4) includes an upper cover plate (401), a lower support plate (402) and a rear baffle (403). The upper cover plate (401) and the lower support plate (402) are respectively connected to the upper and lower sides of the rear baffle (403). The cover seam telescopic support plate (2) is inserted between the upper cover plate (401) and the lower support plate (402) and slidably connected thereto.
3. The universal seamless mesh telescopic device according to claim 2, characterized in that: Anchor bolts (6) are vertically installed on the lower support plate (402). The anchor bolts (6) pass upward through the cover expansion support plate (2), and the cover expansion support plate (2) has holes to accommodate the left and right movement of the anchor bolts (6).
4. The universal seamless mesh telescopic device according to claim 3, characterized in that: Waterproof seals (7) are provided at the bottom of the mesh telescopic panel (1) and at the top of the lower support plate (402).
5. The universal seamless mesh telescopic device according to claim 4, characterized in that: The waterproof seal (7) is a sealing and water-stopping strip.
6. The universal seamless mesh telescopic device according to claim 4, characterized in that: The bottom of the mesh telescopic panel (1) and the top of the lower support plate (402) are both provided with sliding supports (8).
7. The universal seamless mesh telescopic device according to claim 6, characterized in that: The sliding support (8) is a polytetrafluoroethylene sliding plate.
8. The universal seamless mesh telescopic device according to any one of claims 1-7, characterized in that: The mesh-type telescopic panel (1) has a mesh structure inside formed by trapezoidal telescopic ribs that are wider at the bottom and narrower at the top.
9. The universal seamless mesh telescopic device according to claim 8, characterized in that: The expansion joint support plate (2) and the anchor plate (3) are rotatably connected by a vertical steering shaft (9) and a steering bushing (10).
10. The universal seamless mesh telescopic device according to claim 1, characterized in that: The supporting slide (5) is a stainless steel slide.