Bridge expansion device

Abstract

The utility model discloses a bridge expansion device, which comprises two mounting plates, the two mounting plates are respectively mounted on different bridges on two sides of a bridge joint, the mounting plates are elastic plates, a buffer component is mounted in each mounting plate, the top surface of any mounting plate is fixedly connected with a first comb plate, and the top surface of the first comb plate is fixedly connected with a second comb plate. The top face of one mounting plate is fixedly connected with a first comb plate, the top face of the other mounting plate is fixedly connected with a second comb plate, the first comb plate is matched with the second comb plate, a gap is reserved between the first comb plate and the second comb plate, and a limiting assembly is mounted between the first comb plate and the second comb plate. The utility model has the advantages of simple structure, reasonable structure, strong stability and long service life.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge expansion joints, in particular to a bridge expansion device. Background Art

[0002] In bridge engineering, the bridge structure will deform under normal use due to factors such as temperature and vehicle load. Therefore, it is necessary to set a bridge expansion joint at the bridge connection, that is, between the beam end and the abutment or between the bridges, and install a bridge expansion device on the bridge expansion joint to meet the needs of bridge deformation and ensure driving safety and comfort as well as the safety of the bridge structure. In the prior art, it is difficult to ensure the horizontality between the comb plates when the comb plates are installed in the comb plate type expansion device, and during the long-term use of the expansion device, the expansion joint will deform, which will also destroy the horizontality between the comb plates. At the same time, since a large instantaneous load will be generated on the bridge connection when a vehicle passes, it is easy to damage the bridge expansion device. Therefore, there is an urgent need for a bridge expansion device with strong stability and long service life. Utility Model Content

[0003] The purpose of the utility model is to provide a bridge expansion device to solve the problems existing in the above-mentioned prior art.

[0004] To achieve the above-mentioned purpose, the utility model provides the following solution: The utility model provides a bridge expansion device, including two mounting plates, which are respectively installed on different bridges on both sides of the bridge connection, and the mounting plates are elastic plates. A buffer assembly is installed in each mounting plate, and a first comb tooth plate is fixedly connected to the top surface of any mounting plate, and a second comb tooth plate is fixedly connected to the top surface of the other mounting plate, the first comb tooth plate is adapted to the second comb tooth plate, a gap is left between the first comb tooth plate and the second comb tooth plate, and a limiting assembly is installed between the first comb tooth plate and the second comb tooth plate.

[0005] Preferably, the buffer assembly includes a first accommodating chamber and a second accommodating chamber opened in the mounting plate, the first accommodating chamber being fixedly connected to a first accommodating box, the first accommodating box being slidably connected to a first slide, the first slide being adapted to fit an inner wall of the first accommodating box, a push rod being fixedly connected to a top surface of the first slide, a top end of the push rod penetrating the top wall of the first accommodating box and the mounting plate, a pressing plate being fixedly connected to the top end of the push rod, the pressing plate being flush with the top surface of the mounting plate; the second accommodating chamber is located at one side of the first accommodating chamber, the second accommodating chamber being fixedly connected to a second accommodating box, a communicating pipe being provided between the first accommodating box and the second accommodating box, a communicating port of the communicating pipe and the first accommodating box being located below the first slide, a second slide being slidably connected to the second accommodating box, the second slide being vertically arranged, a communicating port of the communicating pipe and the second accommodating box being located at one side of the second slide, a telescopic rod being installed between the other side of the second slide and a side wall of the second accommodating box, a return spring being arranged around the telescopic rod, and an area where the first accommodating box and the second accommodating box are connected being filled with hydraulic oil.

[0006] Preferably, the limit assembly includes a plurality of limit slide grooves provided on the second comb tooth plate, the limit slide grooves are located on both sides of the convex teeth of the second comb tooth plate, the limit slide grooves are horizontally arranged, and receiving grooves are provided on both sides of the convex teeth of the first comb tooth plate corresponding to the limit slide grooves, a limit slider is slidably connected in the receiving groove, one end of the limit slider passes through the side wall of the receiving groove and is located in the limit slide groove, the limit slider is slidably adapted to the limit slide groove, and a compression spring is fixedly connected between the other end of the limit slider and the inner wall of the receiving groove.

[0007] Preferably, the first comb tooth plate and the second comb tooth plate are provided with a plurality of positioning holes, and the mounting plate is fixedly embedded with a plurality of embedded sleeves corresponding to the positioning holes, and bolts matching the embedded sleeves are installed at the positioning holes, and the first comb tooth plate and the second comb tooth plate are fixedly connected to the mounting plate respectively through the bolts.

[0008] Preferably, the positioning hole is a square hole, a rubber block is embedded in the square hole, a groove matching the bolt is formed at the bottom of the rubber block, and the top surface of the rubber block is flush with the top surface of the first comb plate or the second comb plate.

[0009] Preferably, a waterproof plate is fixedly connected between the two mounting plates, the waterproof plate is an arc-shaped plate with a concave top surface, and a filter plate is fixedly connected to the top surface of the waterproof plate.

[0010] Preferably, the mounting plate is a rubber plate.

[0011] The utility model discloses the following technical effects: the utility model can buffer the instantaneous load generated by the vehicle when the vehicle passes by by installing a buffer component in the mounting plate, preventing the impact of the vehicle on the mounting plate and the bridge, reducing the impact on the bridge, and increasing the service life of the telescopic device. At the same time, a limiter component is installed between the first comb plate and the second comb plate, so that when the expansion joint is deformed, the relative position of the first comb plate and the second comb plate can be guaranteed, and dislocation will not occur, making the bridge as a whole more flat and easy to use. The utility model has a simple structure, a reasonable structure, strong stability and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 This is a cross-sectional view of the bridge expansion device of the utility model;

[0014] Figure 2 It is a top view of the first comb plate and the second comb plate of the utility model;

[0015] Figure 3 This is a schematic diagram of the local structure of the limit assembly of the utility model;

[0016] Among them: 1. Mounting plate; 2. Bridge; 3. First comb plate; 4. Second comb plate; 5. First receiving box; 6. First slide plate; 7. Push rod; 8. Press plate; 9. Second receiving box; 10. Connecting pipe; 11. Second slide plate; 12. Telescopic rod; 13. Return spring; 14. Hydraulic oil; 15. Limiting slide groove; 16. Receiving groove; 17. Limiting slider; 18. Compression spring; 19. Positioning hole; 20. Embedded sleeve; 21. Bolt; 22. Rubber block; 23. Waterproof board; 24. Filter plate. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0019] Reference Figure 1-3 The utility model provides a bridge expansion device, including two mounting plates 1, which are respectively mounted on different bridges 2 on both sides of the bridge 2 connection. The mounting plates 1 are elastic plates, and a buffer assembly is installed in each mounting plate 1. A first comb plate 3 is fixedly connected to the top surface of any mounting plate 1, and a second comb plate 4 is fixedly connected to the top surface of the other mounting plate 1. The first comb plate 3 is adapted to the second comb plate 4, and a gap is left between the first comb plate 3 and the second comb plate 4. A limit assembly is installed between the first comb plate 3 and the second comb plate 4. By installing the buffer assembly in the mounting plate 1, the instantaneous load generated by the vehicle when the vehicle passes can be buffered to prevent it from impacting the mounting plate 1 and the bridge 2, reduce the impact on the bridge 2, and increase the service life of the expansion device. At the same time, a limit assembly is installed between the first comb plate 3 and the second comb plate 4, so that it can also ensure the relative position of the first comb plate 3 and the second comb plate 4 when the expansion joint is deformed, and the two will not be misaligned up and down, so that the bridge 2 is more flat as a whole and easy to use.

[0020] In a specific embodiment, the buffer assembly includes a first accommodating cavity and a second accommodating cavity opened in the mounting plate 1, a first accommodating box 5 is fixedly connected in the first accommodating cavity, a first slide plate 6 is slidably connected in the first accommodating box 5, the first slide plate 6 is adapted to the inner wall of the first accommodating box 5, a push rod 7 is fixedly connected to the top surface of the first slide plate 6, the top end of the push rod 7 passes through the top wall of the first accommodating box 5 and the mounting plate 1, a pressing plate 8 is fixedly connected to the top end of the push rod 7, and the pressing plate 8 is flush with the top surface of the mounting plate 1; the second accommodating cavity is located on one side of the first accommodating cavity, and a second accommodating box 5 is fixedly connected in the second accommodating cavity. The first storage box 9 is provided with a connecting pipe 10 between the first storage box 5 and the second storage box 9. The connecting port of the connecting pipe 10 and the first storage box 5 is located below the first slide plate 6. The second storage box 9 is slidably connected with the second slide plate 11. The second slide plate 11 is vertically arranged. The connecting port of the connecting pipe 10 and the second storage box 9 is located on one side of the second slide plate 11. A telescopic rod 12 is installed between the other side of the second slide plate 11 and the side wall of the second storage box 9. A return spring 13 is wound around the telescopic rod 12. The area where the first storage box 5 and the second storage box 9 are connected is filled with hydraulic oil 14. Specifically, the telescopic rod 12 is a common sleeve rod that can realize a telescopic structure, that is, it includes a fixed sleeve and a slide rod. One end of the slide rod is slidably installed in the fixed sleeve. This structure is a prior art and will not be described in detail here. When a vehicle passes, a large instantaneous load will be generated on the mounting plate 1. The pressure plate 8 will be displaced downward under the action of the first comb plate 3 or the second comb plate 4, thereby pushing the first slide plate 6 to move downward. The first slide plate 6 squeezes the second slide plate 11 through the hydraulic oil 14, causing the second slide plate 11 to slide and squeeze the reset spring 13, thereby absorbing the impact generated and preventing the load from damaging the mounting plate 1 and the bridge 2. After the vehicle passes, the second slide plate 11 moves back under the reset spring 13, slowly driving the first slide plate 6 to reset. Using hydraulic buffering can prevent the overall structure from sudden changes under external loads, prevent the structure from being damaged, and increase its service life.

[0021] In a specific embodiment, the limiting assembly includes a plurality of limiting slide grooves 15 provided on the second comb tooth plate 4, the limiting slide grooves 15 are located on both sides of the convex teeth of the second comb tooth plate 4, the limiting slide grooves 15 are arranged horizontally, and the convex teeth of the first comb tooth plate 3 are provided with receiving grooves 16 corresponding to the limiting slide grooves 15 on both sides, and the receiving grooves 16 are slidably connected with a limiting slider 17, one end of the limiting slider 17 passes through the side wall of the receiving groove 16 and is located in the limiting slide groove 15, the limiting slider 17 is slidably adapted to the limiting slide groove 15, and a compression spring 18 is fixedly connected between the other end of the limiting slider 17 and the inner wall of the receiving groove 16. The limiting slider 17 is located in the limiting slide groove 15 below and to the left of the compression spring 18, and can limit the vertical direction of the first comb tooth plate 3 and the second comb tooth plate 4 to ensure the stability of both. At the same time, since the compression spring 18 is an elastic structure, the elastic structure will not affect the displacement of the first comb tooth plate 3 and the second comb tooth plate 4, and can also allow the first comb tooth plate 3 and the second comb tooth plate 4 to rebound after displacement to a certain extent.

[0022] In a specific embodiment, a plurality of positioning holes 19 are provided on the first comb plate 3 and the second comb plate 4, a plurality of embedded sleeves 20 are fixedly embedded on the mounting plate 1 corresponding to the positioning holes 19, bolts 21 adapted to the embedded sleeves 20 are installed at the positioning holes 19, and the first comb plate 3 and the second comb plate 4 are respectively fixedly connected to the mounting plate 1 by the bolts 21. The first comb plate 3 and the second comb plate 4 are installed and fixed by the bolts 21 to ensure structural stability.

[0023] In a specific embodiment, the positioning hole 19 is a square hole, in which a rubber block 22 is embedded, and a groove matching the bolt 21 is formed at the bottom of the rubber block 22, and the top surface of the rubber block 22 is flush with the top surface of the first comb plate 3 or the second comb plate 4. The rubber block 22 limits the bolt 21 so that it is not easy for the bolt 21 to loosen due to vibration during use, thereby ensuring the stability of the structure.

[0024] In a specific embodiment, a waterproof plate 23 is fixedly connected between the two mounting plates 1. The waterproof plate 23 is an arc-shaped plate with a concave top surface, and a filter plate 24 is fixedly connected to the top surface of the waterproof plate 23. The filter plate 24 can filter the fallen debris, and the waterproof plate 23 can guide the water in the expansion joint.

[0025] In a specific embodiment, the mounting plate 1 is a rubber plate, which can buffer the load generated by the vehicle to a certain extent.

[0026] The working process of the utility model: when in use, the limiting slider 17 is located in the limiting slide groove 15 under the action of the compression spring 18, and can limit the vertical direction of the second comb plate 4, so as to ensure that the relative position of the first comb plate 3 and the second comb plate 4 will not be misaligned, and the overall structure will be more stable without interfering with their relative movement. When the vehicle passes, the vehicle will generate a load on the first comb plate 3 and the second comb plate 4, and will apply pressure to the mounting plate 1 during the downward transmission process. When the pressure is transmitted to the mounting plate 1, the first comb plate 3 and the second comb plate 4 will generate pressure on the pressure plate 8, thereby pushing the first slide plate 6 to slide downward. Due to the presence of the hydraulic oil 14, the mounting plate 1 will not undergo a large displacement under the action of the instantaneous load, thereby preventing it from being damaged. After the buffering is completed, the second slide plate 11 slides back under the action of the reset spring 13, thereby moving the first slide plate 6 to the initial position. The hydraulic oil 14 can avoid the phenomenon of large displacement when only the spring is used, and the spring often bears instantaneous pressure and rebounds quickly, which is easy to fatigue itself, and is easy to cause certain damage to the mounting plate 1 and the bridge structure.

[0027] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A bridge expansion device, characterized in that: The invention comprises two mounting plates (1), wherein the two mounting plates (1) are respectively mounted on different bridges (2) on both sides of the connection of the bridges (2); the mounting plates (1) are elastic plates, and a buffer component is installed in each mounting plate (1); a first comb tooth plate (3) is fixedly connected to the top surface of any mounting plate (1), and a second comb tooth plate (4) is fixedly connected to the top surface of the other mounting plate (1); the first comb tooth plate (3) is matched with the second comb tooth plate (4), a gap is left between the first comb tooth plate (3) and the second comb tooth plate (4), and a limit assembly is installed between the first comb tooth plate (3) and the second comb tooth plate (4).

2. The bridge expansion device according to claim 1, characterized in that: The buffer assembly comprises a first accommodating chamber and a second accommodating chamber opened in the mounting plate (1); a first accommodating box (5) is fixedly connected in the first accommodating chamber; a first slide plate (6) is slidably connected in the first accommodating box (5); the first slide plate (6) is adapted to the inner wall of the first accommodating box (5); a push rod (7) is fixedly connected to the top surface of the first slide plate (6); the top end of the push rod (7) passes through the top wall of the first accommodating box (5) and the mounting plate (1); a pressure plate (8) is fixedly connected to the top end of the push rod (7); the pressure plate (8) is flush with the top surface of the mounting plate (1); the second accommodating chamber is located on one side of the first accommodating chamber; a second accommodating box (9) is fixedly connected in the second accommodating chamber; the first A connecting pipe (10) is provided between the containing box (5) and the second containing box (9), and the connecting port between the connecting pipe (10) and the first containing box (5) is located below the first slide plate (6). A second slide plate (11) is slidably connected inside the second containing box (9), and the second slide plate (11) is vertically arranged. The connecting port between the connecting pipe (10) and the second containing box (9) is located on one side of the second slide plate (11). A telescopic rod (12) is installed between the other side of the second slide plate (11) and the side wall of the second containing box (9), and a return spring (13) is wound around the circumference of the telescopic rod (12). The area where the first containing box (5) and the second containing box (9) are connected is filled with hydraulic oil (14).

3. The bridge expansion device according to claim 1, characterized in that: The limiting assembly comprises a plurality of limiting slide grooves (15) provided on the second comb tooth plate (4), wherein the limiting slide grooves (15) are located on both sides of the convex teeth of the second comb tooth plate (4), and the limiting slide grooves (15) are arranged horizontally. Receiving grooves (16) are provided on both sides of the convex teeth of the first comb tooth plate (3) corresponding to the limiting slide grooves (15), and a limiting slider (17) is slidably connected in the receiving groove (16), and one end of the limiting slider (17) passes through the side wall of the receiving groove (16) and is located in the limiting slide groove (15), and the limiting slider (17) is slidably adapted to the limiting slide groove (15), and a compression spring (18) is fixedly connected between the other end of the limiting slider (17) and the inner wall of the receiving groove (16).

4. The bridge expansion device according to claim 1, characterized in that: The first comb tooth plate (3) and the second comb tooth plate (4) are provided with a plurality of positioning holes (19); the mounting plate (1) is provided with a plurality of embedded sleeves (20) corresponding to the positioning holes (19); bolts (21) adapted to the embedded sleeves (20) are installed at the positioning holes (19); the first comb tooth plate (3) and the second comb tooth plate (4) are respectively fixedly connected to the mounting plate (1) via the bolts (21).

5. The bridge expansion device according to claim 4, characterized in that: The positioning hole (19) is a square hole, in which a rubber block (22) is embedded, a groove matching the bolt (21) is formed at the bottom of the rubber block (22), and the top surface of the rubber block (22) is flush with the top surface of the first comb plate (3) or the second comb plate (4).

6. The bridge expansion device according to claim 1, characterized in that: A waterproof plate (23) is fixedly connected between the two mounting plates (1); the waterproof plate (23) is an arc-shaped plate with a concave top surface; and a filter plate (24) is fixedly connected to the top surface of the waterproof plate (23).

7. The bridge expansion device according to claim 1, characterized in that: The mounting plate (1) is a rubber plate.

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