Bridge sealing structure
By using a combination of deformable elastic sealing strips and pressure plates at bridge expansion joints, the problem of wear and corrosion caused by sand and rainwater entering the expansion joint structure is solved, achieving a sealing effect and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YONGJI JIAHAO CONSTRUCTION ENGINEERING CO LTD
- Filing Date
- 2025-08-06
- Publication Date
- 2026-07-21
AI Technical Summary
Existing bridge expansion joint structures are prone to sand and gravel particles and rainwater entering the grooves during expansion and contraction, causing wear and corrosion of components and affecting their service life.
A deformable elastic sealing strip is used, including a first, second and third sealing body, which form a sealing fit with the telescopic beam and the intermediate beam respectively, and are fixed by a pressure plate to ensure that the sealing strip always fits and prevents sand and rainwater from entering.
It achieves the goal of maintaining a seal at the gaps during expansion and contraction, preventing component wear and corrosion, and extending service life.
Smart Images
Figure CN224531440U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of bridge expansion joint technology, specifically relating to a bridge sealing structure. Background Technology
[0002] Patent CN214328499U discloses a bridge expansion joint system that can compensate for large expansion joint widths with an intermediate beam, thereby reducing wear on wheels. However, this structure allows sand particles, rainwater, and other contaminants to enter the grooves, causing wear and rust on the contact surfaces through repeated friction, which in turn leads to the breakage of the extension of the intermediate beam under heavy pressure. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a bridge and road sealing structure that can maintain the seal at the gaps during expansion and contraction, prevent wear and corrosion of the mating surfaces of components, and extend service life.
[0004] This utility model is implemented as follows: a road and bridge sealing structure includes two telescopic beams and a middle beam; it also includes an elastic sealing strip; the inner side of the telescopic beam is provided with a groove, the bottom surface of the groove is provided with a first mating surface, the middle beam has extensions extending to both sides respectively, the bottom surface of the extensions is provided with a second mating surface that can form a sliding fit with the corresponding first mating surface, and the top two sides of the middle beam are provided with arc surfaces. The elastic sealing strip is disposed between the telescopic beam and the intermediate beam, thereby forming a seal with the top surface of the telescopic beam and the top side surface of the intermediate beam.
[0005] Furthermore, the elastic sealing strip has an integrally connected first sealing body, second sealing body and third sealing body; one end of the first sealing body abuts against the top surface of the corresponding telescopic beam to form a sealing fit, and the other end is connected to the second sealing body; the second sealing body is tightly attached to the corresponding side of the intermediate beam to form a sealing fit; one end of the third sealing body is connected to the second sealing body, and the other end abuts against the bottom surface of the corresponding telescopic beam to form a sealing fit.
[0006] Furthermore, both the first and second sealing bodies are arc-shaped structures, and the third sealing body is a bent structure.
[0007] Furthermore, the contact portion between the second sealing body and the top side of the intermediate beam is not less than one-third of its corresponding circumference.
[0008] Furthermore, the telescopic beam also includes a pressure plate, which is installed on the top surface of the telescopic beam and extends inward toward the intermediate beam, thereby forming a sealing fit with the elastic sealing strip; the distance between the two pressure plates is less than the width of the intermediate beam.
[0009] Furthermore, both the first and second mating surfaces are inclined surfaces, and the position closer to the center of the intermediate beam is higher than the position farther from its center.
[0010] Furthermore, both the first and second mating surfaces are horizontal, and a spring is provided in the groove, the spring abutting against the corresponding extension.
[0011] The beneficial effects of this utility model are: 1. This invention uses a deformable elastic sealing strip to seal the gap between the expansion joint and the intermediate beam, preventing sand particles, rainwater, etc. from entering the groove and causing wear between components, thus helping to extend the service life.
[0012] 2. The elastic sealing strip in this invention can always form a reliable seal with the intermediate beam and expansion joint, especially the seal formed by the arc surface, which ensures that the intermediate beam remains in contact with the joint and does not detach after displacement.
[0013] 3. The pressure plate used in this invention can not only form a reliable seal with the elastic sealing strip, but also prevent the elastic sealing strip and the intermediate beam from coming out of the gap, thus achieving effective fixation. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural view of Embodiment 1 of the present invention; Figure 2 for Figure 1 The illustrated embodiment is shown in its current structural side view. Figure 3 for Figure 2 A magnified view of a section at point A in the middle; Figure 4 This is a side view of the structure of Embodiment 2 of the present invention.
[0015] Figure label: 1. Telescopic beam; 2. Intermediate beam; 3. Elastic sealing strip; 4. Anchor plate; 5. Anchor bar; 6. First sealing body; 7. Second sealing body; 8. Third sealing body; 9. Pressure plate; 10. First mating surface; 11. Second mating surface; 12. Groove; 13. Extension; 14. Spring. Detailed Implementation
[0016] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention. Example
[0017] like Figures 1 to 3As shown, this embodiment discloses a bridge sealing structure, including a telescopic beam 1, an intermediate beam 2, and an elastic sealing strip 3. Two telescopic beams 1 are provided and symmetrically installed at the bridge connection. Multiple anchor plates 4 are welded at equal intervals on the outer side of the telescopic beam 1, and each anchor plate 4 is welded with an anchor bar 5. The function of the anchor bars 5 and the anchor plates 4 is to improve the connection strength between the telescopic beam 1 and the concrete.
[0018] The inner side of the telescopic beam 1 is provided with a groove 12, and the bottom surface of the groove 12 is provided with a first mating surface 10. The intermediate beam 2 has extensions 13 extending to both sides, and the bottom surface of the extensions 13 is provided with a second mating surface 11 that can form a sliding fit with the corresponding first mating surface 10. The first mating surface 10 and the second mating surface 11 form a sliding fit, thereby allowing the telescopic beam 1 to slide relative to the road or bridge as it expands or contracts. The top two sides of the intermediate beam 2 are provided with arc surfaces.
[0019] Two elastic sealing strips 3 are provided, and they are respectively placed between the telescopic beam 1 and the intermediate beam 2, so as to form a seal with the top surface of the telescopic beam 1 and the top side of the intermediate beam 2.
[0020] As a preferred example, the elastic sealing strip 3 has an integrally connected first sealing body 6, second sealing body 7, and third sealing body 8. The elastic sealing strip 3 is made of rubber and has a certain elastic deformation capability. Referring to the actual installation, the first sealing body 6 is located at the top and is directly used to cover the gap between the telescopic beam 1 and the intermediate beam 2. Therefore, one end of the first sealing body 6 abuts against the top surface of the corresponding telescopic beam 1 to form a sealing fit, the middle part spans the gap, and the other end abuts against the side of the top of the intermediate beam 2 and connects with the second sealing body 7. The second sealing body 7 is tightly fitted against the corresponding side of the intermediate beam 2 to form a sealing fit. One end of the third sealing body 8 is connected to the second sealing body 7, and the other end abuts against the bottom surface of the corresponding telescopic beam 1 to form a sealing fit. The function of the second sealing body 7 is to form a stable sealing fit with the top side of the intermediate beam 2, and the function of the third sealing body 8 is to abut against the bottom surface of the telescopic beam 1 to fix the elastic sealing strip 3 in the gap.
[0021] As a preferred example, both the first sealing body 6 and the second sealing body 7 are arc-shaped structures, while the third sealing body 8 is a bent structure. The advantage of the arc-shaped structure is that it facilitates elastic deformation and provides a certain degree of limiting and fitting. The bent structure, on the other hand, can better provide resistance and maintain the fixed state on one side.
[0022] As a preferred embodiment, the contact portion between the second sealing body 7 and the top side of the intermediate beam 2 is not less than one-third of its corresponding circumference. This ensures a larger contact area between the second sealing body 7 and the intermediate beam 2, thereby improving the sealing effect and the firmness of the limiting fit.
[0023] In a preferred embodiment, the telescopic beam 1 also includes pressure plates 9, which are installed on the top surface of the telescopic beam 1 and extend inward toward the intermediate beam 2, thereby forming a sealing fit with the elastic sealing strip 3; the distance between the two pressure plates 9 is less than the width of the intermediate beam 2. The function of the pressure plates 9 is to facilitate the fixing of the elastic sealing strip 3, while also limiting its position and preventing it from coming off the intermediate beam 2. Therefore, when it is necessary to disassemble the former, the pressure plates 9 need to be removed first to release the limiting effect.
[0024] As a preferred embodiment, both the first mating surface 10 and the second mating surface 11 are inclined surfaces, and the position closer to the center of the intermediate beam 2 is higher than the position farther from its center. The purpose of setting the mating surfaces as inclined surfaces is that, during the process of the telescopic beams 1 moving closer or further apart, the intermediate beam 2 can descend or rise under the action of the inclined surfaces without displacement in the horizontal direction.
[0025] When the telescopic beams 1 move closer or further apart, the width of the gap changes. Since the elastic sealing strip 3 has elastic deformation capability, it will deform with the change of the gap width to maintain its sealing capability. Example
[0026] like Figure 4 As shown, unlike Embodiment 1, in this embodiment, both the first mating surface 10 and the second mating surface 11 are horizontal surfaces, and a spring 14 is provided in the groove 12, with the spring 14 abutting against the corresponding extension 13. The purpose of this is to use the elastic force of the spring 14 to maintain the intermediate state of the intermediate beam 2 and prevent it from undergoing horizontal displacement during the lifting process.
[0027] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A bridge and road sealing structure, comprising two telescopic beams (1) and an intermediate beam (2); characterized in that, It also includes an elastic sealing strip (3); the inner side of the telescopic beam (1) is provided with a groove (12), the bottom surface of the groove (12) is provided with a first mating surface (10), the intermediate beam (2) has extensions (13) extending to both sides respectively, the bottom surface of the extensions (13) is provided with a second mating surface (11) that can form a sliding fit with the corresponding first mating surface (10), and the top two sides of the intermediate beam (2) are provided with arc surfaces; The elastic sealing strip (3) is disposed between the telescopic beam (1) and the intermediate beam (2), thereby forming a seal with the top surface of the telescopic beam (1) and the top side surface of the intermediate beam (2).
2. The bridge and road sealing structure according to claim 1, characterized in that, The elastic sealing strip (3) has a first sealing body (6), a second sealing body (7) and a third sealing body (8) integrally connected; one end of the first sealing body (6) abuts against the top surface of the corresponding telescopic beam (1) to form a sealing fit, and the other end is connected to the second sealing body (7); the second sealing body (7) is tightly attached to the corresponding side of the intermediate beam (2) to form a sealing fit; one end of the third sealing body (8) is connected to the second sealing body (7), and the other end abuts against the bottom surface of the corresponding telescopic beam (1) to form a sealing fit.
3. The bridge and road sealing structure according to claim 2, characterized in that, The first sealing body (6) and the second sealing body (7) are both arc-shaped structures, and the third sealing body (8) is a bent structure.
4. The bridge and road sealing structure according to claim 3, characterized in that, The contact portion between the second sealing body (7) and the top side of the intermediate beam (2) is not less than one-third of its corresponding circumference.
5. A bridge and road sealing structure according to claim 4, characterized in that, The telescopic beam (1) also includes a pressure plate (9), which is installed on the top surface of the telescopic beam (1) and extends inward toward the intermediate beam (2) to form a sealing fit with the elastic sealing strip (3); the distance between the two pressure plates (9) is less than the width of the intermediate beam (2).
6. A bridge and road sealing structure according to claim 1, characterized in that, Both the first mating surface (10) and the second mating surface (11) are inclined surfaces, and the position near the center of the intermediate beam (2) is higher than the position far from its center.
7. A bridge and road sealing structure according to claim 1, characterized in that, The first mating surface (10) and the second mating surface (11) are both horizontal surfaces, and a spring (14) is provided in the groove (12), the spring (14) abutting against the corresponding extension (13).