Multi-curvature arc-shaped expansion joint

Abstract

The utility model relates to a multi-curvature arc-shaped expansion joint which comprises a fixed plate and a movable plate, a first arc-shaped part and second arc-shaped parts are arranged on one side of the fixed plate, the curvature of the second arc-shaped parts is smaller than that of the first arc-shaped part, and the second arc-shaped parts are arranged and unfolded on the two sides of the first arc-shaped part. The fixed plate is provided with a first arc-shaped part and a second arc-shaped part, one side of the movable plate is provided with a first arc-shaped groove and a second arc-shaped groove, and the first arc-shaped groove and the second arc-shaped groove are matched with the first arc-shaped part and the second arc-shaped part to form butt joint. The second arc-shaped part extends towards the two sides with the small curvature to form a transition area, the first arc-shaped groove and the second arc-shaped groove of the movable plate and the arc-shaped part of the fixed plate form a multi-contact buffering face, multi-term deformation compensation is achieved, and the effect of stress stepped release is achieved through the curvature difference under the action of torsion. The defect of the bridge expansion joint in torsion resistance is effectively overcome, and the service life of the bridge expansion joint is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of expansion joint technology, specifically to a multi-curvature arc-shaped expansion joint. Background Technology

[0002] Bridge expansion joints are installed between the two ends of a bridge to accommodate structural deformation caused by temperature changes and loads. They allow the bridge to expand and contract freely in the parallel and perpendicular directions, improving the smoothness of driving, reducing noise and jolting, preventing rainwater from entering the bridge and causing corrosion of the materials, and extending the bridge's service life.

[0003] Existing bridge expansion joints with toothed or planar protrusions have expansion trajectories that are parallel and perpendicular to the axes. When subjected to external forces, the bridge's oblique expansion stress is limited, resulting in insufficient torsional resistance. Under torsional stress, the bridge's wear and tear will increase, and its service life will be reduced. Utility Model Content

[0004] Based on the above description, this utility model provides a multi-curvature arc-shaped expansion joint to solve the problem of insufficient torsional resistance in existing toothed and planar boss bridge expansion joints.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A multi-curvature arc-shaped expansion joint includes a fixed plate and a movable plate. The fixed plate is provided with a first arc-shaped part and a second arc-shaped part on one side. The curvature of the second arc-shaped part is less than that of the first arc-shaped part. The second arc-shaped parts are arranged and spread on both sides of the first arc-shaped part. The movable plate is provided with a first arc-shaped groove and a second arc-shaped groove on one side, and they are connected with the first arc-shaped part and the second arc-shaped part to form a joint.

[0006] Based on the above technical solution, the present invention can be further improved as follows.

[0007] Furthermore, the first arc-shaped groove is formed in the center of the movable plate near the fixed plate, and the second arc-shaped groove is formed in the movable plate near the fixed plate and is distributed at equal distances at both ends of the first arc-shaped groove.

[0008] Furthermore, the first arc-shaped portion is integrally formed in the center of the fixed plate on the side near the movable plate, the first arc-shaped portion extends to the inner side of the first arc-shaped groove, and the first arc-shaped portion is proportionally reduced in size to the first arc-shaped groove.

[0009] Furthermore, the second arc-shaped portion is integrally formed on the side of the fixed plate near the movable plate and is equidistantly distributed at both ends of the first arc-shaped portion. The second arc-shaped portion extends to the inner side of the second arc-shaped groove and is proportionally reduced in size to the second arc-shaped groove.

[0010] Furthermore, the first arc-shaped portion and the second arc-shaped portion, as well as the two adjacent second arc-shaped portions, are integrally formed with inner rounded corners.

[0011] Furthermore, the first arc-shaped groove and the second arc-shaped groove, as well as the two adjacent second arc-shaped grooves, are integrally formed with outer rounded corners. The outer rounded corners extend to the inner side of the inner rounded corners, and the outer rounded corners are proportionally reduced based on the inner rounded corners.

[0012] Furthermore, the surface of the fixed plate is integrally formed with a support plate that fits the movable plate, and the support plate extends to the outer side of the first arc-shaped portion.

[0013] Furthermore, the fixed plate and the movable plate are respectively curved on the side away from each other, and pre-embedded steel bars are installed on the curved side of both the fixed plate and the movable plate, and the pre-embedded steel bars are distributed at equal intervals.

[0014] Furthermore, a drainage groove is provided on the side of the support plate near the first arc-shaped portion, and the drainage groove is curved between the first arc-shaped portion and the first arc-shaped groove and between the second arc-shaped portion and the second arc-shaped groove.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0016] This invention utilizes a fixed plate in conjunction with a movable plate. In the fixed plate with its double curvature structure, the first arc-shaped portion provides rigid support for the main stress area, while the second arc-shaped portion extends to both sides with a smaller curvature to form a transition zone. The first and second arc-shaped grooves of the movable plate and the arc-shaped portion of the fixed plate form a multi-contact buffer surface, achieving multiple deformation compensations. Under torsional action, the curvature difference achieves a stress-step release effect, effectively solving the problem of insufficient torsional resistance in bridge expansion joints and extending their service life. Attached Figure Description

[0017] Figure 1 A schematic diagram of a multi-curvature arc-shaped expansion joint provided for an embodiment of this utility model;

[0018] Figure 2 This is an exploded structural diagram of the fixed plate and the movable plate in an embodiment of this utility model;

[0019] Figure 3 for Figure 2 A magnified view of a portion of region A in the middle;

[0020] The attached diagram lists the components represented by each number as follows:

[0021] 1. Fixed plate; 11. First arc-shaped part; 12. Second arc-shaped part; 2. Inner rounded corner; 3. Movable plate; 31. First arc-shaped groove; 32. Second arc-shaped groove; 4. Outer rounded corner; 5. Support plate; 51. Drainage groove; 6. Embedded steel bar. Detailed Implementation

[0022] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0024] Please see Figure 1-3 The present invention discloses a multi-curvature arc-shaped expansion joint, comprising a fixed plate 1 and a movable plate 3. The fixed plate 1 has a first arc-shaped portion 11 and a second arc-shaped portion 12 on one side. The curvature of the second arc-shaped portion 12 is less than that of the first arc-shaped portion 11. The second arc-shaped portions 12 are arranged and spread on both sides of the first arc-shaped portion 11. The movable plate 3 has a first arc-shaped groove 31 and a second arc-shaped groove 32 on one side, which are connected with the first arc-shaped portion 11 and the second arc-shaped portion 12 to form a joint.

[0025] Please see Figure 2 The first arc-shaped groove 31 is opened in the center of the movable plate 3 near the fixed plate 1, and the second arc-shaped groove 32 is opened in the movable plate 3 near the fixed plate 1, and is located at both ends of the first arc-shaped groove 31 at equal distances. The first arc-shaped groove 31 and the symmetrically distributed second arc-shaped groove 32 form a multi-level progressive contact surface. The design of the second arc-shaped groove 32 being distributed at equal distances improves the uniformity of force on the movable plate 3 and avoids single-point fatigue failure.

[0026] Please see Figure 2The first arc-shaped portion 11 is integrally formed on the center of the fixed plate 1 near the movable plate 3, extending to the inner side of the first arc-shaped groove 31, and proportionally reduced in size to the first arc-shaped groove 31. The second arc-shaped portion 12 is integrally formed on the side of the fixed plate 1 near the movable plate 3, and is equidistantly distributed at both ends of the first arc-shaped portion 11. The second arc-shaped portion 12 extends to the inner side of the second arc-shaped groove 32, and proportionally reduced in size to the second arc-shaped groove 32. The first arc-shaped portion 11, the second arc-shaped portion 12... The double curvature design of the two arc-shaped parts 12 forms a multi-level buffer structure. The first arc-shaped part 11 bears the main torsional load, while the second arc-shaped part 12 disperses the remaining stress and improves the adaptability to oblique deformation. The progressive contact surface formed by the curvature difference between the first arc-shaped part 11 and the second arc-shaped part 12 effectively solves the problem of force concentration between the fixed plate 1 and the moving part. The gap width between the first arc-shaped part 11, the second arc-shaped part 12 and the first arc-shaped groove 31, the second arc-shaped groove 32 is equal, ensuring the accuracy of the telescopic guidance of the moving plate 3.

[0027] Please see Figure 2 The first arc-shaped part 11 and the second arc-shaped part 12, as well as the two adjacent second arc-shaped parts 12, are integrally formed with inner rounded corners 2. The first arc-shaped groove 31 and the second arc-shaped groove 32, as well as the two adjacent second arc-shaped grooves 32, are integrally formed with outer rounded corners 4. The outer rounded corners 4 extend to the inner side of the inner rounded corners 2. The outer rounded corners 4 are proportionally reduced based on the inner rounded corners 2. The proportional design of the inner rounded corners 2 and the outer rounded corners 4, together with the arc-shaped parts and the arc-shaped grooves, forms a continuous stress transmission path. The arc surfaces of the inner rounded corners 2 and the outer rounded corners 4 disperse the force, thereby reducing the stress fatigue of the movable plate 3 and the fixed plate 1 and extending their service life.

[0028] Please see Figure 1 The surface of the fixed plate 1 is integrally formed with a support plate 5 that fits the movable plate 3. The support plate 5 extends to the outside of the first arc-shaped part 11. The fixed plate 1 and the movable plate 3 are curved on the side that is far away from each other. Both the fixed plate 1 and the movable plate 3 are equipped with embedded steel bars 6. The embedded steel bars 6 are evenly distributed. The evenly distributed embedded steel bars 6 can achieve multi-point fixation inside the road surface.

[0029] Please see Figure 3 A drainage groove 51 is provided on the side of the support plate 5 near the first arc-shaped part 11. The drainage groove 51 is curved and bent between the first arc-shaped part 11 and the first arc-shaped groove 31 and between the second arc-shaped part 12 and the second arc-shaped groove 32. The drainage groove 51 is located between the first arc-shaped part 11 and the first arc-shaped groove 31 and between the second arc-shaped part 12 and the second arc-shaped groove 32. The bending design of the drainage groove 51 extends the drainage distance and achieves dynamic sealing in conjunction with the movement of the expansion joint, thereby improving the waterproof performance of the expansion joint.

[0030] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-curvature arc-shaped expansion joint, characterized in that, include: The fixed plate (1) and the movable plate (3) are provided with a first arc-shaped part (11) and a second arc-shaped part (12) on one side of the fixed plate (1). The curvature of the second arc-shaped part (12) is less than that of the first arc-shaped part (11). The second arc-shaped part (12) is arranged and spread on both sides of the first arc-shaped part (11). The movable plate (3) is provided with a first arc-shaped groove (31) and a second arc-shaped groove (32) on one side, which are connected to the first arc-shaped part (11) and the second arc-shaped part (12).

2. The multi-curvature arc-shaped expansion joint according to claim 1, characterized in that: The first arc-shaped groove (31) is opened in the center of the movable plate (3) near the fixed plate (1), and the second arc-shaped groove (32) is opened in the movable plate (3) near the fixed plate (1) and is located at both ends of the first arc-shaped groove (31) at equal distances.

3. The multi-curvature arc-shaped expansion joint according to claim 1, characterized in that: The first arc-shaped portion (11) is integrally formed in the center of the fixed plate (1) on the side close to the movable plate (3). The first arc-shaped portion (11) extends to the inner side of the first arc-shaped groove (31). The first arc-shaped portion (11) is proportionally reduced to the first arc-shaped groove (31).

4. The multi-curvature arc-shaped expansion joint according to claim 1, characterized in that: The second arc-shaped part (12) is integrally formed on the side of the fixed plate (1) near the movable plate (3) and is located at both ends of the first arc-shaped part (11) at equal distances. The second arc-shaped part (12) extends to the inside of the second arc-shaped groove (32) and is proportionally reduced in size to the second arc-shaped groove (32).

5. The multi-curvature arc-shaped expansion joint according to claim 1, characterized in that: The first arc-shaped part (11) and the second arc-shaped part (12) and the two adjacent second arc-shaped parts (12) are integrally formed with inner rounded corners (2).

6. The multi-curvature arc-shaped expansion joint according to claim 5, characterized in that: The first arc groove (31) and the second arc groove (32) and the two adjacent second arc grooves (32) are integrally formed with outer rounded corners (4). The outer rounded corners (4) extend to the inner side of the inner rounded corners (2). The outer rounded corners (4) are proportionally reduced based on the inner rounded corners (2).

7. The multi-curvature arc-shaped expansion joint according to claim 1, characterized in that: The surface of the fixed plate (1) is integrally formed with a support plate (5) that fits the movable plate (3), and the support plate (5) extends to the outside of the first arc-shaped part (11).

8. The multi-curvature arc-shaped expansion joint according to claim 7, characterized in that: The fixed plate (1) and the movable plate (3) are arranged in a curved shape on the side away from each other. Both the fixed plate (1) and the movable plate (3) are equipped with embedded steel bars (6), which are distributed at equal intervals.

9. The multi-curvature arc-shaped expansion joint according to claim 7, characterized in that: The support plate (5) has a drainage groove (51) on the side near the first arc-shaped part (11). The drainage groove (51) is curved between the first arc-shaped part (11) and the first arc-shaped groove (31) and between the second arc-shaped part (12) and the second arc-shaped groove (32).

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