Metal anti-falling beam buffer chain
By designing a multi-stage fortified metal anti-fall beam buffer chain, using the multi-stage deformation mechanism of disc springs and buffer rods, the existing anti-fall beam device is easily damaged in earthquakes, achieving high durability and effective energy absorption effects.
Patent Information
- Application Number
- CN202421292227.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-06-07
AI Technical Summary
Existing anti-fall beam devices are prone to cause destructive damage to poor elastic components when collisions in bridge earthquakes, and the rubber strips have weak energy absorption capacity and poor long-lasting performance.
The metal anti-fall beam buffer chain is adopted, including iron chains, limit caps, buffer rods, disc springs and steel cylinders. Through a multi-stage fortification mechanism, the elastic deformation of the disc spring is utilized in the first stage, the plastic deformation of the buffer rods in the second stage, and the rigid limit of the third stage, absorbing and dispersing seismic energy.
Multi-stage fortification and prevent falling beams were achieved. All parts are made of metal, with good durability, which can effectively absorb seismic energy, reduce damage to the bridge structure, and help bridge reset after earthquakes.
Smart Images
Figure CN222834708U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of buffer chains, in particular to a metal anti-falling beam buffer chain. Background Art
[0002] Most of the bridges with small and medium spans use a simply supported beam structure. During an earthquake disaster, when the displacement of the bridge's superstructure exceeds the limit displacement, collisions and beam falls occur between adjacent beam sections. This is characterized by sudden destruction, difficulty in repair, and traffic interruption, and it is necessary to adopt anti-beam-falling devices.
[0003] Traditional anti-beam-falling devices usually set anti-beam-falling blocks on the top of the pier or on both sides of the cap beam for limiting the position. This anti-beam-falling device collides with the beam body in a rigid collision, which can easily cause destructive damage to components with poor elasticity.
[0004] There is also a commonly used anti-falling beam buffer chain composed of a rubber strip and a steel or iron chain, in which one end of the rubber strip is fixed to the bridge pier and the other end is connected to the chain, and the other end of the chain is fixed to the beam. The device mainly uses the rubber strip to reduce the impact force, and the chain limits the maximum displacement, effectively preventing the decline of the bridge superstructure during an earthquake and reducing the damage to the bridge structure caused by the earthquake. However, it should be noted that the rubber strip is easily affected by aging and the durability of the anti-falling beam device, and the energy absorption capacity of the rubber strip is relatively weak. Utility Model Content
[0005] The utility model aims to solve the shortcomings in the prior art and proposes a metal anti-falling beam buffer chain.
[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a metal anti-falling beam buffer chain, including a buffer chain assembly and two embedded parts respectively connected to the pier and the beam body, the buffer chain assembly includes an iron chain, a limiting cap, a buffer rod, a disc spring, and a steel cylinder. The buffer rod is inserted into the steel cylinder A and then the disc spring. After the buffer rod is screwed onto the limiting block, the buffer rod and the limiting cap B, the limiting cap A and the steel cylinder A, and the steel cylinder B and the steel cylinder A are connected as a whole through threads.
[0007] The effects achieved by the above components are: the buffer chain adopts multi-level protection to prevent beam falling, all parts are made of metal, with good durability, the first stage is the elastic energy dissipation of the disc spring, the second stage is the plastic energy dissipation of the metal, the third stage is the rigid limit, and the disc spring is reset after the shock.
[0008] Preferably, the surface of the buffer rod is slidably connected to the inner wall of the steel cylinder A, and the surface of the buffer rod is slidably connected to the inner wall of the steel cylinder B.
[0009] The effects achieved by the above components are: the steel cylinder A and the steel cylinder B can be used to limit the buffer rod, reduce the shaking or breakage of the buffer rod during use, and increase the stability of the buffer rod.
[0010] Preferably, one end of the disc spring is fixedly connected to the inner wall of the steel cylinder A, and the other end of the disc spring is fixedly connected to the buffer rod.
[0011] The effect achieved by the above components is that when the buffer rod moves, it will squeeze the disc spring, so that the buffer rod can achieve the effect of unloading force under the reaction force of the disc spring, thereby reducing the impact force on the buffer rod.
[0012] Preferably, the inner wall of the iron chain is rotatably connected to the surface of the embedded part A, and the other end of the iron chain is rotatably connected to the limiting cap A.
[0013] The effect achieved by the above components is: under the rotation of the iron chain, embedded part A and limit cap A, steel cylinder A and steel cylinder B become more flexible, and can rotate to adapt to different degrees of inclination when under pressure, preventing steel cylinder A and steel cylinder B from breaking under pressure.
[0014] Preferably, the buffer rod is fixedly connected to the limiting cap B, and the limiting cap B is rotatably connected to the embedded part B.
[0015] The effect achieved by the above components is: under the rotational connection between the limit cap B and the embedded part B, the rotation of the steel cylinder A and the steel cylinder B can be adapted, and the mobility of the steel cylinder A and the steel cylinder B can be further improved.
[0016] Preferably, when the bridge is in normal working condition, the anti-falling beam buffer chain is in an untensioned state.
[0017] The effect achieved by the above components is: when the anti-beam-falling buffer chain is not in a taut state, it will not exert additional force on the bridge in normal working conditions; when the bridge undergoes a large displacement and there is a risk of beam falling, the anti-beam-falling buffer chain starts to work.
[0018] Compared with the prior art, the advantages and positive effects of the utility model are:
[0019] The buffer chain adopts multi-stage protection to prevent beam falling. All parts are made of metal with good durability. The first stage is the elastic energy dissipation of disc spring, the second stage is the plastic energy dissipation of metal, the third stage is the rigid limit, and the disc spring resets after the shock. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a diagram of the contracted state of the utility model;
[0021] Figure 2 It is a stretching state diagram of the utility model;
[0022] Figure 3This is a diagram of the first stretching state of the buffer rod of the utility model;
[0023] Figure 4 The second stretching state diagram of the buffer rod of the utility model
[0024] Figure 5 This is a diagram of the buffer rod of the utility model in the third stretched state.
[0025] Legend: 1. Embedded part A; 2. Iron chain; 3. Limiting cap A; 4. Buffer rod; 5. Disc spring; 6. Steel cylinder A; 7. Steel cylinder B; 8. Limiting cap B; 9. Embedded part B. DETAILED DESCRIPTION
[0026] Reference Figure 1-5 As shown, this embodiment discloses a metal anti-falling beam buffer chain, including a buffer chain assembly and two embedded parts respectively connected to the pier and the beam body, the buffer chain assembly includes an iron chain 2, a limiting cap, a buffer rod 4, a disc spring 5, and a steel cylinder. The buffer rod 4 is inserted into the steel cylinder A6 and then the disc spring 5. After the buffer rod 4 is screwed onto the limiting block, the buffer rod 4 and the limiting cap B8, the limiting cap A3 and the steel cylinder A6, and the steel cylinder B7 and the steel cylinder A6 are connected as a whole through threads. When the anti-falling beam buffer chain starts to work, in the first stage, the elastic deformation of the disc spring 5 is used to absorb and disperse the seismic energy, and the buffer rod 4 moves to the left a maximum amount of H1; in the second stage, the disc spring 5 is fully compressed, and the buffer rod 4 begins to plastically deform and consume energy, but no fracture or damage occurs, and the maximum plastic stretching deformation of the buffer rod 4 is H2; in the third stage, there is no gap between the buffer rod 4 and the steel cylinder A6 and the steel cylinder B7, and limiting is performed; after the external force is removed, the compression force of the disc spring 5 begins to be released to help the bridge to reset.
[0027] Reference Figure 1-5 As shown, this embodiment discloses that the surface of the buffer rod 4 is slidably connected to the inner wall of the steel cylinder A6, and the surface of the buffer rod 4 is slidably connected to the inner wall of the steel cylinder B7. The steel cylinder A6 and the steel cylinder B7 can be used to limit the buffer rod 4, thereby reducing the shaking or breakage of the buffer rod 4 during use and increasing the stability of the buffer rod 4. One end of the disc spring 5 is fixedly connected to the inner wall of the steel cylinder A6, and the other end of the disc spring 5 is fixedly connected to the buffer rod 4. When the buffer rod 4 moves, the disc spring 5 is squeezed, so that the buffer rod 4 can achieve a force unloading effect under the reaction force of the disc spring 5, thereby reducing the impact force on the buffer rod 4.
[0028] Reference Figure 1-5 As shown, this embodiment discloses that the inner wall of the iron chain 2 is rotatably connected to the surface of the embedded part A1, and the other end of the iron chain 2 is rotatably connected to the limit cap A3. Under the rotation action of the iron chain 2, the embedded part A1 and the limit cap A3, the steel cylinder A6 and the steel cylinder B7 are more flexible, and can be rotated to adapt to different degrees of inclination when under pressure, thereby preventing the steel cylinder A6 and the steel cylinder B7 from breaking under pressure.
[0029] Reference Figure 1-5 As shown, this embodiment discloses that the buffer rod 4 is fixedly connected to the limit cap B8, and the limit cap B8 is rotatably connected to the embedded part B9. Under the rotational connection between the limit cap B8 and the embedded part B9, the rotation of the steel cylinder A6 and the steel cylinder B7 can be adapted to further improve the activity of the steel cylinder A6 and the steel cylinder B7.
[0030] Reference Figure 1-5 As shown, this embodiment discloses that the buffer chain is in an untensioned state when the bridge is in normal working conditions. When the anti-beam-falling buffer chain is not in a tensioned state, no additional force will be applied to the bridge in normal working conditions. When the bridge undergoes a large displacement and there is a risk of beam falling, the anti-beam-falling buffer chain starts to work.
[0031] Working principle: When the bridge is in normal working condition, the anti-beam drop buffer chain is not in a taut state and no additional force is applied to the bridge. When the bridge undergoes a large displacement and there is a risk of beam drop, the anti-beam drop buffer chain starts to work. In the first stage, the elastic deformation of the disc spring 5 is used to absorb and disperse the seismic energy, and the buffer rod 4 moves to the left a maximum amount of H1; in the second stage, the disc spring 5 is fully compressed, and the buffer rod 4 begins to plastically deform and consume energy, but no fracture or damage occurs, and the maximum plastic stretching amount of the buffer rod 4 is H2; in the third stage, there is no gap between the buffer rod 4 and the steel cylinder A6 and the steel cylinder B7, and they are limited; after the external force is removed, the compression force of the disc spring 5 begins to release to help the bridge reset.
[0032] The above is only a preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model. In the description of the utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood by specific circumstances.
Claims
1. A metal anti-falling beam buffer chain, comprising a buffer chain assembly and two embedded parts respectively connected to a bridge pier and a beam body, characterized in that: The buffer chain assembly comprises an iron chain (2), a limit cap, a buffer rod (4), a disc spring (5), and a steel cylinder. The buffer rod (4) is inserted into the steel cylinder A (6) and then into the disc spring (5). After the buffer rod (4) is screwed onto the limit block, the buffer rod (4) and the limit cap B (8), the limit cap A (3) and the steel cylinder A (6), and the steel cylinder B (7) and the steel cylinder A (6) are connected as a whole through threads.
2. A metal anti-falling beam buffer chain according to claim 1, characterized in that: The surface of the buffer rod (4) is slidably connected to the inner wall of the steel cylinder A (6), and the surface of the buffer rod (4) is slidably connected to the inner wall of the steel cylinder B (7).
3. A metal anti-falling beam buffer chain according to claim 2, characterized in that: One end of the disc spring (5) is fixedly connected to the inner wall of the steel cylinder A (6), and the other end of the disc spring (5) is fixedly connected to the buffer rod (4).
4. The metal anti-falling beam buffer chain according to claim 3, characterized in that: The inner wall of the iron chain (2) is rotatably connected to the surface of the embedded part A (1), and the other end of the iron chain (2) is rotatably connected to the limiting cap A (3).
5. The metal anti-falling beam buffer chain according to claim 4, characterized in that: The buffer rod (4) is fixedly connected to the limiting cap B (8), and the limiting cap B (8) is rotatably connected to the embedded part B (9).