Railing cross-core type external shock absorber suitable for pedestrian overpass
By introducing through-type external shock absorbers into the pedestrian overpass railings, and utilizing components such as iron cylinders, springs, and dampers, the problem of resonance between the railings and the bridge structure was solved, enhancing the stability and safety of the overpass and reducing the risk of pedestrians falling.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-06
- Publication Date
- 2026-04-03
AI Technical Summary
Existing pedestrian overpass railings are prone to resonance with the bridge structure during earthquakes, which can cause the connection between the railing and the bridge structure to loosen, crack, or even collapse entirely, posing a risk of pedestrians falling. They also lack effective shock absorption functions.
The railing adopts a through-type external shock absorber, which includes components such as iron cylinders, springs, protective covers, and dampers. It uses the TMD principle to reduce the resonance between the railing and the bridge body, and provides guidance through guide grooves and guide blocks to reduce the possibility of dust and rainwater entering and extend the life of the shock absorber.
It effectively reduces resonance between the guardrail and the bridge structure, enhances the overall stability of the overpass, improves the safety of the guardrail, reduces the risk of pedestrians falling, and extends the service life of the shock absorber.
Smart Images
Figure CN224077963U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vibration reduction for pedestrian overpass railings, and in particular to a through-type external vibration damper suitable for pedestrian overpass railings. Background Technology
[0002] A pedestrian overpass is a structure that spans obstacles such as roads, railways, and rivers. It is mainly used to facilitate pedestrians to cross roads, railways, or rivers safely. Pedestrian overpasses need to be equipped with guardrails, which can effectively prevent pedestrians from accidentally falling from the edge of the overpass, especially in places where the overpass is high or has a slope, to ensure the safety of pedestrians.
[0003] Existing pedestrian overpasses generally use reinforced concrete or pile foundations to enhance their stability during earthquakes. Seismic design codes are adopted, such as increasing the cross-sectional dimensions of beams and columns and improving the reinforcement ratio. Vibration damping devices, such as rubber seismic isolation bearings and lead-core seismic isolation bearings, are installed between the overpass and the piers to provide seismic resistance for the pedestrian overpasses.
[0004] In existing technologies, pedestrian overpasses lack the shock-absorbing function of guardrails. Guardrails are generally fixed to the bridge deck by railing posts. During an earthquake, the guardrails and the overpass resonate, and the guardrails cannot effectively buffer and dissipate energy. The vibration force will intensify the transmission of vibration to the bridge structure, causing key components such as beams and columns to bear greater loads and deformations. This can lead to loosening and cracking at the connection between the guardrails and the bridge structure, or even the entire guardrails collapsing, posing a risk of pedestrians falling and endangering their lives. To address these issues, a through-type external shock absorber suitable for pedestrian overpasses is proposed. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a through-type external shock absorber for pedestrian overpasses, aiming to improve the problem that the existing through-type external shock absorbers for pedestrian overpasses lack shock absorption capacity, leading to resonance with the overpass and reduced safety protection.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: a through-type external shock absorber for pedestrian overpass railings, comprising a railing post, a base plate at the bottom of the railing post, a protective cover fixedly connected to the top of the base plate, a spring fixedly connected to the top of the base plate, a washer fixedly connected to the top of the spring, an iron cylinder fixedly connected to the top of the washer, an air valve on the surface of the protective cover, and a shock-absorbing auxiliary component inside the protective cover.
[0007] As a further description of the above technical solution:
[0008] The protective cover is fitted onto the outer wall of the spring, and the inner wall at the center of the iron cylinder is fixedly connected to the bottom end of the railing post.
[0009] As a further description of the above technical solution:
[0010] The shock absorption auxiliary component includes a damper, a magnetic ring one is fixedly connected to the top of the base plate, and a magnetic ring two is fixedly connected to the bottom of the pad.
[0011] As a further description of the above technical solution:
[0012] The bottom of the damper is fixedly connected to the top of the base plate, the top of the damper is fixedly connected to the bottom of the gasket, and the spring is sleeved on the outer wall of the damper.
[0013] As a further description of the above technical solution:
[0014] The first magnetic ring is mounted on the outer wall of the spring, and the second magnetic ring is mounted on the outer wall of the spring.
[0015] As a further description of the above technical solution:
[0016] The inner wall of the protective cover is provided with a guide groove, and a guide block is slidably connected to the inner wall of the guide groove. A sealing ring is fixedly connected to the outer wall of the railing post, and an inclined surface is provided on the top outer wall of the sealing ring.
[0017] As a further description of the above technical solution:
[0018] The outer wall of the guide block on the side away from the guide groove is fixedly connected to the circumferential surface of the gasket.
[0019] As a further description of the above technical solution:
[0020] The bottom of the sealing ring is fixedly connected to the top of the iron cylinder, and the protective cover is fitted onto the outer wall of the sealing ring.
[0021] This utility model has the following beneficial effects:
[0022] 1. In this utility model, by combining structures such as iron cylinders, gaskets, springs, protective covers, air valves, base plates, and shock-absorbing auxiliary components, the shock absorber is installed under the guardrail and uses the TMD principle to achieve earthquake resistance, avoiding resonance between the guardrail and the overpass during an earthquake, increasing the overall stability of the overpass, and at the same time, the shock-absorbing components reduce their contact with air through the protective cover, thereby improving the overall lifespan of the shock absorber.
[0023] 2. In this utility model, by setting a guide groove, a guide block, a sealing ring and an inclined surface, the gasket is guided when the iron cylinder moves up and down under force, so as to avoid the phenomenon of spring shifting due to uneven force. At the same time, under normal conditions, it can reduce the possibility of dust and rainwater entering the protective cover, and ensure that the shock-absorbing component exerts maximum force during an earthquake. Attached Figure Description
[0024] Figure 1 This is a side view of the main structure of a through-type external shock absorber for the railings of pedestrian overpasses, as proposed in this utility model.
[0025] Figure 2 This is a partial sectional view of the main structure of a through-type external shock absorber for the railings of pedestrian overpasses, as proposed in this utility model.
[0026] Figure 3 This utility model proposes a through-type external shock absorber for pedestrian overpass railings. Figure 2 Enlarged view of region A in the middle;
[0027] Figure 4 This is a partial structural sectional view of a through-type external shock absorber for the railings of pedestrian overpasses, as proposed in this utility model.
[0028] Legend:
[0029] 1. Railing post; 2. Iron cylinder; 3. Gasket; 4. Spring; 5. Protective cover; 6. Air valve; 7. Base plate; 8. Damper; 9. Magnetic ring one; 10. Magnetic ring two; 11. Guide groove; 12. Guide block; 13. Sealing ring; 14. Inclined surface. Detailed Implementation
[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0031] Reference Figures 1-3This utility model provides an embodiment of a through-type external shock absorber for pedestrian overpass railings, comprising a railing post 1, a base plate 7 at the bottom of the railing post 1, a protective cover 5 fixedly connected to the top of the base plate 7, a spring 4 fixedly connected to the top of the base plate 7, the protective cover 5 being fitted onto the outer wall of the spring 4, a washer 3 fixedly connected to the top of the spring 4, and an iron cylinder 2 fixedly connected to the top of the washer 3. The iron cylinder 2 acts as a mass block and fits against the inner wall of the protective cover 5. The inner wall of the protective cover 5 is roughened to increase the friction between the iron cylinder 2 and the inner wall of the protective cover 5 when the iron cylinder 2 slides up and down. The inner wall at the center of the iron cylinder 2 is fixedly connected to the bottom end of the railing post 1. An air valve 6 is provided on the surface of the protective cover 5. The protective cover 5 covers the spring 4 and the iron cylinder 2, and the air is discharged from the inside of the protective cover 5 through the air valve 6, so that the internal components of the protective cover 5 are not exposed to the air, thus maximizing its effectiveness and extending its service life.
[0032] Reference Figures 2-4 The protective cover 5 is equipped with a shock-absorbing auxiliary component, which includes a damper 8. The bottom of the damper 8 is fixedly connected to the top of the base plate 7, and the top of the damper 8 is fixedly connected to the bottom of the pad 3. The spring 4 is sleeved on the outer wall of the damper 8. A magnetic ring 9 is fixedly connected to the top of the base plate 7 and is sleeved on the outer wall of the spring 4. A magnetic ring 10 is fixedly connected to the bottom of the pad 3 and is sleeved on the outer wall of the spring 4. The magnetic forces on opposite sides of the magnetic ring 9 and the magnetic ring 10 are mutually repulsive. The mutual repulsive magnetic force can play a certain buffering role during the movement of the spring 4, thereby reducing the transmission of vibration.
[0033] Reference Figure 2 and Figure 4 The inner wall of the protective cover 5 is provided with a guide groove 11, and a guide block 12 is slidably connected to the inner wall of the guide groove 11. The outer wall of the guide block 12 away from the guide groove 11 is fixedly connected to the circumferential surface of the pad 3. Two sets of guide grooves 11 and guide blocks 12 are provided respectively, and the two sets of guide grooves 11 and guide blocks 12 are symmetrical about the central axis of the protective cover 5. The guide block 12 provides vertical displacement guidance for the pad 3, so that when vibration occurs, the pad 3 can only move vertically, avoiding the risk of the spring 4 shifting due to lateral force or uneven load. A sealing ring 13 is fixedly connected to the outer wall of the railing post 1. The bottom of the sealing ring 13 is fixedly connected to the top of the iron cylinder 2. The protective cover 5 is fitted on the outer wall of the sealing ring 13. An inclined surface 14 is provided on the top outer wall of the sealing ring 13. The sealing ring 13 increases the sealing between the railing post 1 and the protective cover 5. The inclined surface 14 can slide naturally under the influence of gravity in rainy weather, avoiding accumulation.
[0034] Working principle: The railing post 1 is fixed inside the cavity of the iron cylinder 2. The bottom area of the railing post 1 is located inside the protective cover 5. The base plate 7 is fixed to the bridge deck by external bolts or welding. After installation, the air valve 6 is used to extract the air from the inside of the protective cover 5. During an earthquake, the vibration force will cause the railing post 1 to move the iron cylinder 2 up and down in the protective cover 5. The spring 4 will then stretch and deform. Combined with the damping function of the damper 8 and the repulsive force of the magnetic ring 10, the railing post 1 is provided with shock absorption. When the pad 3 moves up and down, it drives the guide block 12 to slide inside the guide groove 11, avoiding the phenomenon of local displacement of the spring 4 under local force. This prevents the railing from resonating with the overpass through the railing post 1. The shock absorption can dissipate the energy of the vibration force, reduce the impact force, and enhance the overall stability of the overpass.
[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 through-type external shock absorber for pedestrian overpass railings, comprising railing posts (1), characterized in that: The bottom of the railing post (1) is provided with a base plate (7), the top of the base plate (7) is fixedly connected with a protective cover (5), the top of the base plate (7) is fixedly connected with a spring (4), the top of the spring (4) is fixedly connected with a pad (3), the top of the pad (3) is fixedly connected with an iron cylinder (2), the surface of the protective cover (5) is provided with an air valve (6), and the inside of the protective cover (5) is provided with a shock-absorbing auxiliary component.
2. The through-type external shock absorber for pedestrian overpass railings according to claim 1, characterized in that: The protective cover (5) is fitted on the outer wall of the spring (4), and the inner wall at the center of the iron cylinder (2) is fixedly connected to the bottom end of the railing post (1).
3. The through-type external shock absorber for pedestrian overpass railings according to claim 1, characterized in that: The shock absorption auxiliary component includes a damper (8), a magnetic ring one (9) is fixedly connected to the top of the base plate (7), and a magnetic ring two (10) is fixedly connected to the bottom of the pad (3).
4. A through-type external shock absorber for pedestrian overpass railings according to claim 3, characterized in that: The bottom of the damper (8) is fixedly connected to the top of the base plate (7), the top of the damper (8) is fixedly connected to the bottom of the pad (3), and the spring (4) is sleeved on the outer wall of the damper (8).
5. A through-type external shock absorber for pedestrian overpass railings according to claim 4, characterized in that: The first magnetic ring (9) is sleeved on the outer wall of the spring (4), and the second magnetic ring (10) is sleeved on the outer wall of the spring (4).
6. The through-type external shock absorber for pedestrian overpass railings according to claim 1, characterized in that: The inner wall of the protective cover (5) is provided with a guide groove (11), and the inner wall of the guide groove (11) is slidably connected with a guide block (12). The outer wall of the railing post (1) is fixedly connected with a sealing ring (13), and the top outer wall of the sealing ring (13) is provided with an inclined surface (14).
7. A through-type external shock absorber for pedestrian overpass railings according to claim 6, characterized in that: The outer wall of the guide block (12) away from the guide groove (11) is fixedly connected to the circumferential surface of the gasket (3).
8. A through-type external shock absorber for pedestrian overpass railings according to claim 6, characterized in that: The bottom of the sealing ring (13) is fixedly connected to the top of the iron cylinder (2), and the protective cover (5) is fitted on the outer wall of the sealing ring (13).