Bridge support anti-displacement limiting device

Abstract

The utility model provides a bridge support anti -displacement limiting device, including support seat, and support seat is connected between fly beam through the guard beam structure, the guard beam structure includes the removal groove, and the removal groove is opened in support seat upper end, and the removal groove is fixed with the removal rod, and the removal block is slidably connected with the removal rod and both ends pass through the spring buffer, the removal block upper end is fixed with the buffer assembly, and the buffer assembly is connected with fly beam, the bridge support anti -displacement limiting device can provide certain buffer, and fly beam also avoids the separation of support seat.

Description

Technical Field

[0001] This utility model relates to the field of bridge foundation technology, and in particular to a bridge bearing anti-displacement limiting device. Background Technology

[0002] Bridge bearings are key components that connect the superstructure of a bridge, such as beams and slabs, with the substructure, such as piers and abutments. Their core functions are to transfer loads, adapt to deformation, and ensure structural stability.

[0003] Bridge bearing anti-displacement limiting devices are key structural components in bridge structures used to limit bearing displacement and prevent abnormal sliding or detachment of the bearings. They are auxiliary safety devices in the bridge bearing system. Their core function is to ensure that the bearings operate normally within the design limits through physical constraints, avoiding structural safety hazards caused by excessive bearing displacement due to external forces such as vehicle loads, temperature changes, and earthquakes.

[0004] Currently, existing bridge support blocks have several drawbacks. Most existing devices fix the supports to the top of the piers to prevent displacement due to external pressure. However, because the supports are completely fixed, the expansion and contraction caused by temperature changes are forcibly confined within the beam, leading to significant tensile stress and potentially causing concrete cracking. This reduces the device's practicality. Furthermore, existing devices use two pre-cast steel plates installed on the top of the pier and the bottom of the beam. When a buffer plate is needed between these plates, external temperature variations can cause misalignment of the plates and the internal threads, making installation impossible and further reducing applicability. Therefore, a bridge support anti-displacement limiting block is urgently needed to solve these problems. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a bridge bearing anti-displacement limiting device to ensure that there is a certain buffer between the support and the flying beam, thereby reducing the cracking of concrete during use after installation.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A bridge bearing anti-displacement limiting device includes a support base, which is connected to the flying beam via a protective beam structure; The guard beam structure includes a movable groove, which is opened at the upper end of the support base. A movable rod is fixed in the movable groove. The movable block slides with the movable rod and is buffered by springs at both ends. A buffer assembly is fixed at the upper end of the movable block and is connected to the flying beam.

[0007] Limiting blocks are fixed on the left and right support seats at the upper end of the movable groove.

[0008] The width of the moving block matches the width of the moving slot.

[0009] The buffer assembly includes a first steel plate fixed to the movable block. A buffer plate and a second steel plate are sequentially attached to the upper end of the first steel plate. The first steel plate, the buffer plate, and the second steel plate are connected and locked together by threaded rods and nuts.

[0010] Both the first and second steel plates are provided with a straight hole for the threaded rod to pass through; the buffer plate is provided with a round hole for the threaded rod to pass through.

[0011] The straight holes and round holes are in multiple sets and correspond one-to-one.

[0012] The buffer plate is made of polyurethane.

[0013] The buffer assembly is located between two sets of limiting blocks, and the corresponding distance between the buffer assembly and the limiting blocks on both sides is between 20mm and 50mm.

[0014] This utility model provides a bridge bearing anti-displacement limiting device, which has the following technical effects: 1) When subjected to temperature changes, the fly beam expands and contracts. However, existing designs, being rigidly connected, force the fly beam to stop expanding and contracting, leading to internal stress and potential cracking. This device, by incorporating a moving groove, moving rod, springs, moving blocks, and limiting blocks, allows the moving blocks to move within the moving groove. Multiple springs buffer the impact force during the moving blocks' movement, thus mitigating the impact on the superstructure. Furthermore, when the first and second steel plates experience significant impact, the two limiting blocks provide rigid support and restraint, preventing the fly beam from detaching from its support base. This also prevents the expansion and contraction caused by temperature changes from being forcibly confined within the fly beam, thus avoiding excessive tensile stress and preventing concrete cracking. This significantly improves the device's practicality.

[0015] 2) When external temperature or other factors cause a positional shift between the first screw hole of the first steel plate and the second screw hole of the second steel plate, by setting the first and second screw holes as slotted holes with multiple sets, even with a certain degree of shift, the threaded rod can still be inserted into the first screw hole, the buffer plate, and the second screw hole, thus facilitating the installation of the buffer plate. This avoids the situation where the first and second steel plates are misaligned and cannot be installed, improving the applicability of the equipment to a certain extent. Moreover, its overall structure is simple and reasonable in design, highly practical, and easy to promote and apply. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the cut-out state of the movable groove of the support base in this utility model.

[0018] Figure 3 This is an exploded view of the present invention.

[0019] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0020] Figure 5 This is a cross-sectional view of the protective beam structure in this utility model.

[0021] In the diagram: support base 1, guard beam structure 2, flying beam 3, moving groove 21, moving rod 22, spring 23, limit block 24, moving block 25, first steel plate 26, first screw hole 27, buffer plate 28, second steel plate 29, second screw hole 210, threaded rod 211, nut 212. Detailed Implementation

[0022] like Figure 1 As shown, a bridge bearing anti-displacement limiting device includes a support base 1, which is connected to a fly beam 3 via a protective beam structure 2. The support base 1 is located on the bridge pier, and the fly beam 3 is located at the bottom of the bridge.

[0023] like Figure 2 As shown, the guard beam structure 2 includes a movable groove 21, which is located at the middle of the upper surface of the support base 1. Limiting blocks 24 are fixedly connected to the upper end of the support base 1, on the left and right sides of the movable groove 21. Movable rods 22 are fixed inside the movable groove 21, and two sets of movable rods 22 are provided. Movable blocks 25 are slidably mounted on the two sets of movable rods 22. The movable blocks 25 have a π-structure, including a horizontal plate at the upper end and vertical plates spaced apart at the lower end. The upper end of the movable blocks 25 is fixedly connected to the first steel plate 26. Springs 23 are provided on opposite sides of the two vertical plates of the movable blocks 25, and the springs 23 are sleeved on the movable rods 22. The two ends of the springs 23 abut against the surface of one end of the movable block 25 and the inner wall surface of the movable groove 21, respectively. Thus, the first steel plate 26 can move left or right relative to the movable rods 22 via the movable blocks 25. The springs 23 buffer the movement of the movable blocks 25 within the movable groove 21.

[0024] Preferably, the width of the movable block 25 matches the width of the movable groove 21, and the height of the movable block 25 matches the height of the movable groove 21. By adapting the internal dimensions of the movable groove 21 to the external dimensions of the movable block, and with the two ends of the spring abutting against the surface of one end of the movable block and the inner wall surface of the movable groove respectively, this design makes the movable block 25 more stable when moving left and right within the movable groove 21.

[0025] A buffer plate 28 is attached to the upper end of the first steel plate 26. The buffer plate 28 itself has good elasticity and impact resistance, which can buffer the pressure transmitted by the flying beam 3. A second steel plate 29 is attached to the upper end of the buffer plate 28, and the upper end of the second steel plate 29 is fixed to the bottom of the flying beam 3. Multiple first screw holes 27 are opened around the perimeter of the first steel plate 26, and multiple second screw holes 210 are opened around the perimeter of the second steel plate 29. Multiple round holes are opened around the perimeter of the buffer plate 28.

[0026] The threaded rod 211 is provided in multiple sets. Each threaded rod 211 passes through the first threaded hole 27 of the first steel plate 26, the round hole of the buffer plate 28 and the second threaded hole 210 of the second steel plate 29 and is then tightened by the nut 212.

[0027] Both the first screw hole 27 and the second screw hole 210 are slotted holes. The buffer plate 28 has circular holes, and the positions of the circular holes, the first screw hole 27, and the second screw hole 210 correspond one-to-one. The advantage of making the first screw hole 27 and the second screw hole 210 slotted holes is that the threaded rod 211 can move inside the first screw hole 27 and the second screw hole 210.

[0028] The buffer plate 28 is made of polyurethane, which has the advantage of being able to buffer the positional shift of the bridge caused by external temperature changes or vibrations due to the good elasticity and impact resistance of the material itself.

[0029] The distance between the two ends of the first steel plate 26, the buffer plate 28, and the second steel plate 29 and the corresponding limiting block 24 is ±20mm-±50mm. The advantage is that it allows the first steel plate 26, the buffer plate 28, and the second steel plate 29 to shift to the left or right by ±20mm-±50mm between the two limiting blocks 24.

[0030] The two sets of movable rods 22 in this application, as well as all movable parts, require regular cleaning and maintenance, including but not limited to dust removal and lubrication.

[0031] Working principle and process: When the flying beam 3 shakes or shifts due to external temperature changes and vibrations, the displacement of the flying beam 3 can be transmitted to the outer surface of the buffer plate 28 through the second steel plate 29 to buffer the impact force of the flying beam 3; at the same time, it can also drive the moving block 25 to move in the moving groove 21, so that the impact force transmitted by the flying beam 3 can be buffered again under the elastic force of the multiple sets of springs 23. The movement position of the first steel plate 26 and the second steel plate 29 can be restricted by the two sets of limiting blocks 24, so as to prevent the flying beam 3 from detaching from the upper outer surface of the support base 1.

Claims

1. A bridge bearing anti-displacement limiting device, characterized in that: Includes a support base (1), and the support base (1) and the flying beam (3) are connected by a protective beam structure (2); The protective beam structure (2) includes a moving groove (21), which is opened on the upper end of the support base (1). A moving rod (22) is fixed in the moving groove (21). The moving block (25) slides with the moving rod (22) and is buffered by springs (23) at both ends. A buffer assembly is fixed on the upper end of the moving block (25), and the buffer assembly is connected to the flying beam (3).

2. The bridge bearing anti-displacement limiting device according to claim 1, characterized in that: Limiting blocks (24) are fixed on the support seats (1) on the left and right sides of the upper end of the moving groove (21).

3. The bridge bearing anti-displacement limiting device according to claim 2, characterized in that: The width of the moving block (25) matches the width of the moving slot (21).

4. The bridge bearing anti-displacement limiting device according to claim 3, characterized in that: The buffer assembly includes a first steel plate (26) fixed to the movable block (25). A buffer plate (28) and a second steel plate (29) are sequentially attached to the upper end of the first steel plate (26). The first steel plate (26), the buffer plate (28) and the second steel plate (29) are connected and locked by a threaded rod (211) and a nut (212).

5. A bridge bearing anti-displacement limiting device according to claim 4, characterized in that: The first steel plate (26) and the second steel plate (29) are provided with a straight hole for the threaded rod (211) to pass through; the buffer plate (28) has a round hole for the threaded rod (211) to pass through.

6. A bridge bearing anti-displacement limiting device according to claim 5, characterized in that: The straight holes and round holes are in multiple sets and correspond one-to-one.

7. A bridge bearing anti-displacement limiting device according to claim 6, characterized in that: The buffer plate (28) is made of polyurethane.

8. A bridge bearing anti-displacement limiting device according to claim 7, characterized in that: The buffer component is located between two sets of limiting blocks (24), and the corresponding distance between the buffer component and the limiting blocks (24) on both sides is between 20mm and 50mm.

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