Bridge anti-seismic telescopic device

Abstract

The invention discloses a bridge anti-seismic telescopic device, and relates to the technical field of bridge construction, the bridge anti-seismic telescopic device comprises a mounting seat, the inner wall of the mounting seat is fixedly connected with a connecting seat, the connecting seat is internally provided with a limiting cavity, the limiting cavity is internally slidably connected with a push rod, and the outer wall of the push rod is fixedly connected with a first toothed plate; a transmission gear is meshed with the outer surface of the first toothed plate, a second toothed plate is meshed with the end, away from the first toothed plate, of the outer surface of the transmission gear, and when a part is damaged, a connecting base, a limiting cavity, a push rod, the first toothed plate, the transmission gear, the second toothed plate, a sliding block, a reset spring and a limiting block are arranged, so that a worker only needs to push the push rod to unlock; the buffer seat can be quickly taken out and replaced, the device does not need to be integrally detached and replaced, the replacement process is greatly simplified, manpower, time and economic cost are remarkably saved, meanwhile, the locking reliability of the limiting block in the working state is ensured through the reset spring, and the stability and safety of the device in normal use are ensured.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to a bridge seismic expansion joint device. Background Technology

[0002] Expansion joints, also known as bridge expansion joints, are structural joints installed at appropriate locations along the road to prevent cracks or damage caused by changes in climate and temperature (thermal expansion and contraction). Expansion joints divide the road into two independent sections, allowing for horizontal expansion and contraction along its length. Currently, in my country, bridges are equipped with expansion joints to accommodate deck deformation. These joints are devices installed in the gaps between adjacent bridge sections. The joints can be part of the main girder or in abutments connected to the main girder. Bridge expansion joints must allow free expansion and contraction in both the length and width directions of the bridge, be robust and reliable, ensure a smooth ride for vehicles without bumps or noise, and prevent rainwater, debris, and mud from seeping in and causing blockages.

[0003] Most existing expansion joints on bridges are fixed installations. When the seismic expansion parts of the expansion joint are damaged, the entire structure needs to be replaced. However, replacing all of them at once is very troublesome, wastes resources, and is costly. In addition, during use, the components of the bridge expansion joints are prone to collisions, which shortens the service life of the bridge expansion joints and increases the cost of use. Therefore, a seismic expansion joint for bridges is proposed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies, such as the need for complete replacement, which is cumbersome, wasteful of resources, and costly. Furthermore, the components of bridge expansion joints are prone to collisions during use, leading to a shortened service life. Therefore, this invention proposes a bridge seismic expansion joint.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A bridge seismic expansion joint includes a mounting base, a connecting base fixedly connected to the inner wall of the mounting base, a limiting cavity formed inside the connecting base, a push rod slidably connected inside the limiting cavity, a first toothed plate fixedly connected to the outer wall of the push rod, a transmission gear meshing on the outer surface of the first toothed plate, a second toothed plate meshing on the outer surface of the transmission gear away from the first toothed plate, a sliding block fixedly connected to the outer wall of the second toothed plate, a return spring fixedly connected to one side of the outer wall of the sliding block, a limiting block fixedly connected to the outer wall of the sliding block away from the return spring, a connecting block engaging on the outer wall of the limiting block, a telescopic rod fixedly connected to the outer wall of the connecting block, a buffer seat slidably connected to the end of the telescopic rod away from the connecting block, a support plate slidably connected inside the buffer seat, an outer cylinder and an inner cylinder fixedly connected to the end of the support plate away from the telescopic rod, an inner cylinder slidably connected inside the outer cylinder, shock-absorbing springs provided inside the outer and inner cylinders, and a telescopic spring fixedly installed between the support plates and sleeved on the outer surfaces of the outer and inner cylinders.

[0006] Furthermore, the mounting base is provided in two symmetrical mirror images. The mounting base has a U-shaped structure and forms a telescopic space with openings at the top and bottom. The force is ultimately applied to the support plate, which connects the outer cylinder and the inner cylinder. The internal shock-absorbing spring is the core energy-consuming component of this system. When the support plate is subjected to force, the outer cylinder and the inner cylinder move relative to each other, violently compressing or stretching the shock-absorbing spring, thereby converting the huge seismic energy into the potential energy of the spring and dissipating it.

[0007] Furthermore, an I-beam is provided between the lower openings of the two mounting bases, and support bases are fixedly connected to the outer walls of both ends of the I-beam.

[0008] Furthermore, the upper left and right sides of the I-beam extend into the interior of two mounting seats respectively, and the lower left and right sides of the I-beam are slidably connected to the two mounting seats respectively.

[0009] Furthermore, the inner bottom wall of the two mounting bases is provided with multiple sliding grooves, and sliders are slidably connected inside the multiple sliding grooves. The upper surface of the sliders is fixedly connected to the bottom wall of the support base, providing lateral (horizontal) buffering capacity. During an earthquake, the bridge may sway laterally, allowing the support base and the I-beam to have a certain sliding space in the lateral direction, thus avoiding structural damage due to excessive lateral constraint.

[0010] Furthermore, hollow tubes are fixedly connected to the lower ends of the inner walls of the two mounting bases, and sliding columns are slidably connected inside the hollow tubes. A buffer plate is fixedly installed at the end of the sliding column away from the hollow tube.

[0011] Furthermore, wear-resistant plates are provided on the adjacent sides of both buffer plates, and the two buffer plates are horizontally positioned with the upper end of the I-beam.

[0012] Furthermore, a shock-absorbing connector is provided between the upper openings of the two mounting seats. The tops of the two mounting seats are respectively equipped with a first telescopic platform and a second telescopic platform by fixing bolts. The shock-absorbing connector also plays the same key role as the rubber sealing strip in filling gaps, waterproofing, dustproofing, and noise reduction. The first and second telescopic platforms form the bridge deck to ensure that vehicles pass smoothly.

[0013] Furthermore, the transmission gear is rotatably connected to the connecting seat via a bearing, and the end of the return spring away from the sliding block is fixedly connected to the inner wall of the connecting seat. A moving groove is provided on the upper surface of the connecting seat, and the top of the push rod passes through the moving groove and extends to the top of the connecting seat. A limiting groove is provided on one side of the outer wall of the connecting block, and the shape and size of the limiting groove are adapted to the shape and size of the limiting block. This clarifies the installation method of the transmission gear and the fixing method of the return spring. The moving groove ensures the linear movement of the push rod, and the precise cooperation between the limiting groove and the limiting block ensures the reliability of the locking action.

[0014] Furthermore, a buffer spring is fitted on the outer surface of the sliding column and the hollow tube. The top of the buffer spring is fixedly connected to the outer wall of the buffer plate, and the bottom of the buffer spring is fixedly connected to the inner wall of the mounting base.

[0015] The present invention has the following beneficial effects: 1. In this invention, when a component is damaged, the connection seat, limiting cavity, push rod, first toothed plate, transmission gear, second toothed plate, sliding block, return spring, and limiting block allow the operator to simply push the push rod to release the lock, quickly remove and replace the buffer seat, without the need for complete disassembly of the device. This greatly simplifies the replacement process and significantly saves manpower, time, and economic costs. At the same time, the return spring ensures the locking reliability of the limiting block in the working state, guaranteeing the stability and safety of the device during normal use.

[0016] 2. In this invention, the telescopic rod, buffer seat, support plate, outer cylinder, inner cylinder, shock-absorbing spring and telescopic spring can efficiently filter and absorb the energy generated by the daily expansion and contraction and vibration of the bridge, greatly improving the ride smoothness and device stability. At the same time, the I-beam, hollow tube, sliding column and buffer plate can prevent the two mounting seats from colliding and the components between the bridge expansion device from being damaged by rapid expansion and contraction, thus extending the service life of the bridge expansion device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a bridge seismic expansion joint proposed in this invention; Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle; Figure 3 This is a three-dimensional schematic diagram of a portion of the structure in this invention; Figure 4 This is a three-dimensional schematic diagram of the internal structure of the buffer seat in this invention; Figure 5 This is a three-dimensional schematic diagram of the internal structure of the inner and outer cylinders in this invention; Figure 6 This is a three-dimensional schematic diagram of the internal structure of the connector in this invention.

[0018] In the diagram: 1. Mounting base; 2. Connecting base; 3. Limiting cavity; 4. Push rod; 5. First toothed plate; 6. Transmission gear; 7. Second toothed plate; 8. Sliding block; 9. Return spring; 10. Limiting block; 11. Connecting block; 12. Telescopic rod; 13. Buffer seat; 14. Support plate; 15. Outer cylinder; 16. Inner cylinder; 17. Shock-absorbing spring; 18. Telescopic spring; 19. I-beam; 20. Support seat; 21. Sliding groove; 22. Hollow tube; 23. Sliding column; 24. Buffer plate; 25. Wear-resistant plate; 26. Shock-absorbing connector; 27. First telescopic platform; 28. Second telescopic platform; 29. ​​Buffer spring. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1 like Figure 1 - Figure 6 As shown, the present invention proposes a bridge seismic expansion joint device, comprising a mounting base 1, a connecting base 2 fixedly connected to the inner wall of the mounting base 1, a limiting cavity 3 formed inside the connecting base 2, a push rod 4 slidably connected inside the limiting cavity 3, a first toothed plate 5 fixedly connected to the outer wall of the push rod 4, a transmission gear 6 meshing on the outer surface of the first toothed plate 5, a second toothed plate 7 meshing on the outer surface of the transmission gear 6 away from the first toothed plate 5, a sliding block 8 fixedly connected to the outer wall of the second toothed plate 7, a return spring 9 fixedly connected to one side of the outer wall of the sliding block 8, and a sliding block 8 away from the return spring 9 fixedly connected to the outer wall of the other side of the sliding block 8. A limiting block 10 is provided, and a connecting block 11 is snapped onto the outer wall of the limiting block 10. A telescopic rod 12 is fixedly connected to the outer wall of the connecting block 11. A buffer seat 13 is slidably connected to the end of the telescopic rod 12 away from the connecting block 11. A support plate 14 is slidably connected inside the buffer seat 13. An outer cylinder 15 and an inner cylinder 16 are fixedly connected to the end of the support plate 14 away from the telescopic rod 12. The inner cylinder 16 is slidably connected inside the outer cylinder 15. Shock-absorbing springs 17 are provided inside the outer cylinder 15 and the inner cylinder 16. A telescopic spring 18 is fixedly installed between the support plates 14 and sleeved on the outer surface of the outer cylinder 15 and the inner cylinder 16.

[0021] Mounting base 1 has two symmetrical mirror images of each other. Mounting base 1 has a U-shaped structure and forms a telescopic space with openings at the top and bottom.

[0022] A shock-absorbing connector 26 is provided between the openings at the upper ends of the two mounting bases 1, and a first telescopic platform 27 and a second telescopic platform 28 are respectively installed on the top of the two mounting bases 1 by fixing bolts.

[0023] The transmission gear 6 is rotatably connected to the connecting seat 2 via a bearing. The end of the return spring 9 away from the sliding block 8 is fixedly connected to the inner wall of the connecting seat 2. A moving groove is provided on the upper surface of the connecting seat 2. The top of the push rod 4 passes through the moving groove and extends to the top of the connecting seat 2. A limiting groove is provided on one side of the outer wall of the connecting block 11. The shape and size of the limiting groove are adapted to the shape and size of the limiting block 10.

[0024] In this embodiment, when the bridge extends and retracts horizontally, the telescopic rod 12 between the two mounting seats 1 also extends and retracts. When the telescopic rod 12 slides within the buffer seat 13, it causes the support plates 14 to press against each other, causing the inner cylinder 16 to slide horizontally within the outer cylinder 15. The horizontal sliding of the inner cylinder 16 compresses the shock-absorbing spring 17. The shock-absorbing spring 17 filters the bridge's extension and retraction vibrations through its own elasticity. Furthermore, the telescopic spring 18, sleeved on the outer surfaces of the outer cylinder 15 and the inner cylinder 16, effectively absorbs the extension and retraction energy of the buffer seat 13 through its own elasticity, ensuring the stable use of the extension device. During bridge extension and retraction, the telescopic spring 18 assists in the compression and rebound of the buffer seat 13, preventing damage to internal components during compression and rebound, and improving the service life of the extension device. When the anti-seismic extension and retraction parts of the extension device are damaged... Workers push the push rod 4, causing the first toothed plate 5 to move. The moving first toothed plate 5 drives the meshing transmission gear 6 to rotate. The rotating transmission gear 6 drives the meshing second toothed plate 7 to move, and at the same time, it causes the sliding block 8 fixed to it to slide and move, so that the limiting block 10 disengages from the limiting groove on the connecting block 11. In this way, the limiting fixation of the connecting blocks 11 at both ends of the telescopic rod 12 is released, and the telescopic rod 12 and the buffer seat 13 can be removed from the inside of the connecting seat 2, completing the disassembly of the buffer seat 13. During installation, simply insert the connecting block 11 at the end of the telescopic rod 12 away from the connecting seat 2 into the connecting seat 2 and release the push rod 4. The return spring 9 in the limiting cavity 3 uses its own elasticity to drive the limiting block 10 into the connecting block 11, which can conveniently and quickly install the buffer seat 13 without replacing the whole thing. It is easy to disassemble and assemble, saving costs and manpower.

[0025] Example 2 like Figure 1 - Figure 6 As shown, based on Embodiment 1, an I-beam 19 is provided between the lower openings of the two mounting bases 1, and support bases 20 are fixedly connected to the outer walls of both ends of the I-beam 19.

[0026] The upper left and right sides of the I-beam 19 extend into the two mounting bases 1 respectively, and the lower left and right sides of the I-beam 19 are slidably connected to the two mounting bases 1 respectively.

[0027] The inner bottom wall of the two mounting bases 1 has multiple sliding grooves 21, and sliders are slidably connected inside the multiple sliding grooves 21. The upper surface of the sliders is fixedly connected to the bottom wall of the support base 20.

[0028] Hollow tubes 22 are fixedly connected to the lower inner walls of the two mounting bases 1. Sliding columns 23 are slidably connected inside the hollow tubes 22. A buffer plate 24 is fixedly installed at the end of the sliding column 23 away from the hollow tubes 22.

[0029] Wear-resistant plates 25 are provided on the adjacent sides of the two buffer plates 24, and the two buffer plates 24 are horizontally positioned at the upper end of the I-beam 19.

[0030] A buffer spring 29 is fitted on the outer surface of the sliding column 23 and the hollow tube 22. The top of the buffer spring 29 is fixedly connected to the outer wall of the buffer plate 24, and the bottom of the buffer spring 29 is fixedly connected to the inner wall of the mounting base 1.

[0031] In this embodiment, when the bridge expands or contracts, the two mounting seats 1 move closer to each other, and the two buffer plates 24 inside the mounting seats 1 move towards the I-beam 19. When the upper part of the I-beam 19 collides with the buffer plate 24, the buffer plate 24 transmits the impact force to the sliding column 24. The sliding column 24 retracts inward into the hollow tube 22 and compresses air, which, together with the elastic force of the buffer spring 29, buffers the impact force generated during the expansion and contraction of the bridge. This slows down the expansion and contraction speed of the two mounting seats 1, avoids collision between the two mounting seats 1 and damage to the components between the bridge expansion and contraction devices due to rapid expansion and contraction, and extends the service life of the bridge expansion and contraction device.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bridge seismic expansion joint, comprising a mounting base (1), characterized in that: The mounting base (1) is fixedly connected to the inner wall of the connecting base (2). The connecting base (2) has a limiting cavity (3) inside. The limiting cavity (3) is slidably connected to the push rod (4). The outer wall of the push rod (4) is fixedly connected to the first toothed plate (5). The outer surface of the first toothed plate (5) is meshed with a transmission gear (6). The outer surface of the transmission gear (6) away from the first toothed plate (5) is meshed with a second toothed plate (7). The outer wall of the second toothed plate (7) is fixedly connected to the sliding block (8). One side of the outer wall of the sliding block (8) is fixedly connected to a return spring (9). The outer wall of the sliding block (8) away from the return spring (9) is fixedly connected to a limiting block (10). The limiting block (10) A connecting block (11) is snapped onto the outer wall. A telescopic rod (12) is fixedly connected to the outer wall of the connecting block (11). A buffer seat (13) is slidably connected to the end of the telescopic rod (12) away from the connecting block (11). A support plate (14) is slidably connected inside the buffer seat (13). An outer cylinder (15) and an inner cylinder (16) are fixedly connected to the end of the support plate (14) away from the telescopic rod (12). An inner cylinder (16) is slidably connected inside the outer cylinder (15). Shock-absorbing springs (17) are provided inside the outer cylinder (15) and the inner cylinder (16). A telescopic spring (18) is fixedly installed between the support plates (14) and sleeved on the outer surface of the outer cylinder (15) and the inner cylinder (16).

2. The bridge seismic expansion joint device according to claim 1, characterized in that: The mounting base (1) has two and is arranged symmetrically and mirrored on the left and right. The mounting base (1) has a U-shaped structure and forms a telescopic space with openings at the top and bottom.

3. A bridge seismic expansion joint device according to claim 2, characterized in that: An I-beam (19) is provided between the lower openings of the two mounting bases (1), and a support base (20) is fixedly connected to the outer walls of both ends of the I-beam (19).

4. A bridge seismic expansion joint device according to claim 3, characterized in that: The upper left and right sides of the I-beam (19) extend into the two mounting seats (1) respectively, and the lower left and right sides of the I-beam (19) are slidably connected to the two mounting seats (1) respectively.

5. A bridge seismic expansion joint device according to claim 1, characterized in that: The inner bottom wall of the two mounting bases (1) is provided with multiple sliding grooves (21), and a slider is slidably connected inside the multiple sliding grooves (21). The upper surface of the slider is fixedly connected to the bottom wall of the support base (20).

6. A bridge seismic expansion joint according to claim 1, characterized in that: Hollow tubes (22) are fixedly connected to the lower ends of the inner walls of the two mounting bases (1). A sliding column (23) is slidably connected inside the hollow tube (22). A buffer plate (24) is fixedly installed at the end of the sliding column (23) away from the hollow tube (22).

7. A bridge seismic expansion joint according to claim 6, characterized in that: The two buffer plates (24) are provided with wear-resistant plates (25) on their adjacent sides, and the two buffer plates (24) are horizontally arranged with the upper end of the I-beam (19).

8. A bridge seismic expansion joint device according to claim 1, characterized in that: A shock-absorbing connector (26) is provided between the upper openings of the two mounting seats (1), and a first telescopic platform (27) and a second telescopic platform (28) are respectively installed on the top of the two mounting seats (1) by fixing bolts.

9. A bridge seismic expansion joint according to claim 1, characterized in that: The transmission gear (6) is rotatably connected to the connecting seat (2) through a bearing. The end of the return spring (9) away from the sliding block (8) is fixedly connected to the inner wall of the connecting seat (2). A moving groove is provided on the upper surface of the connecting seat (2). The top of the push rod (4) passes through the moving groove through the connecting seat (2) and extends to the top of the connecting seat (2). A limiting groove is provided on one side of the outer wall of the connecting block (11). The shape and size of the limiting groove are adapted to the shape and size of the limiting block (10).

10. A bridge seismic expansion joint according to claim 1, characterized in that: The outer surfaces of the sliding column (23) and the hollow tube (22) are fitted with buffer springs (29). The top of the buffer springs (29) is fixedly connected to the outer wall of the buffer plate (24), and the bottom of the buffer springs (29) is fixedly connected to the inner wall of the mounting base (1).

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