Ballast bed floating vibration isolation device

Abstract

The application relates to the field of floating slab vibration isolation, in particular to a floating track bed vibration isolation device arranged between a foundation and a floating track bed, wherein an installation channel is arranged on the floating track bed, the device comprises an embedded fixing structure installed in the installation channel and a spring vibration isolation assembly installed between the foundation and the floating track bed, the embedded fixing structure is made of concrete, the embedded fixing structure is hollow inside and passes through the spring vibration isolation assembly, the embedded fixing structure is supported on the spring vibration isolation assembly, the spring vibration isolation assembly comprises a lower force transmission piece installed on the foundation, an upper force transmission piece abutting against the embedded fixing structure, an elastic assembly fixed between the upper force transmission piece and the lower force transmission piece and a sealing shell fixed between the upper force transmission piece and the lower force transmission piece, and the sealing shell is sleeved on the elastic assembly. The application has the effects of guaranteeing the service life of the floating track bed and reducing the cost of the maintenance support sleeve.

Description

Technical Field

[0001] This application relates to the field of vibration isolation of floating slabs, and in particular to a vibration isolation device for floating track beds. Background Technology

[0002] When a train runs on a track, the impact energy generated during its operation causes track vibration and noise. Track vibration can directly damage the track structure and ancillary facilities, and over time, it can also lead to track deformation, indirectly affecting the stability and safety of train operation. It also threatens surrounding buildings and underground facilities, and the noise generated by train operation disrupts the quiet environment of nearby residential areas. Currently, vibration isolators are generally used to form a floating slab track system to isolate vibration energy.

[0003] Reference Figure 1 This is a schematic diagram of the structure of the currently used vibration isolator. It mainly includes a support sleeve 3 installed in the installation channel of the floating track bed 1 and a spring vibration isolator assembly 4 installed on the foundation 2. One end of the support sleeve 3 has a stepped section, forming a support step 31 on the outer wall of the support sleeve 3 to support the floating track bed 1. The inner wall of the support sleeve 3 forms a support surface 32 for the spring vibration isolator assembly 4 to be embedded. During installation, the spring vibration isolator assembly 4 is directly installed on the foundation 2, and the support sleeve 3 is supported on the spring vibration isolator assembly 4. This allows the spring vibration isolator assembly 4 to support the floating track bed 1. When a train travels on the floating track bed 1, the force on the floating track bed 1 is transmitted to the spring vibration isolator assembly 4 through the support sleeve 3, thereby buffering and isolating the track, reducing vibration and noise caused by hard impacts.

[0004] As an irreplaceable force-transmitting component in floating track beds, the support sleeve is generally made of steel and undergoes hot-dip galvanizing for corrosion protection, resulting in high costs. Furthermore, regular inspection and maintenance of its corrosion protection function are required during use. Immersion in water also accelerates the corrosion of the support sleeve, increasing maintenance costs and affecting its service life, thus impacting the overall lifespan of the floating track bed. Utility Model Content

[0005] In order to ensure the service life of floating track bed and reduce the cost of maintaining support sleeves, this application provides a vibration isolation device for floating track bed.

[0006] The floating track bed vibration isolation device provided in this application adopts the following technical solution: A vibration isolation device for a floating track bed is disposed between a foundation and a floating track bed. An installation channel is provided on the floating track bed. The device includes a fixed structure installed within the installation channel and a spring vibration isolation assembly installed between the foundation and the floating track bed. The fixed structure is made of concrete and has a hollow channel through which the spring vibration isolation assembly passes. The fixed structure is supported on the spring vibration isolation assembly. The spring vibration isolation assembly includes a lower force transmission member installed on the foundation, an upper force transmission member abutting against the fixed structure, an elastic component fixed between the upper and lower force transmission members, and a sealing shell fixed between the upper and lower force transmission members. The sealing shell is sleeved on the elastic component.

[0007] By adopting the above technical solutions, the embedded structure is made of concrete, which, compared with the support sleeve made of steel, does not require hot-dip galvanizing for corrosion protection, thus reducing costs; the spring vibration isolation component is set between the foundation and the floating track bed, which can absorb or buffer the vibration energy of the track and reduce the vibration and noise caused by hard impacts on the track; the sealing shell is fitted on the elastic component, which can protect the elastic component.

[0008] Optionally, a sealing housing is provided between the upper force transmission member and the lower force transmission member, and the sealing housing is sleeved on the elastic component.

[0009] By adopting the above technical solution, the sealed housing can protect the elastic component and prevent it from being affected by external dust, water, etc.

[0010] Optionally, the elastic vibration isolation assembly further includes a leveling pad disposed on the side of the upper force transmission member away from the elastic assembly.

[0011] By adopting the above technical solution, the leveling pads can be used to level the floating track bed, making the installation of the vibration isolation device on the floating track bed more stable, enhancing the buffering and vibration isolation effect of the vibration isolation device on track vibration and noise, and ensuring the stability and safety of train operation.

[0012] Optionally, multiple leveling pads are provided.

[0013] By adopting the above technical solution, setting multiple leveling pads can more accurately adjust the elevation of the floating track bed, thereby improving the stability and vibration isolation effect of the vibration isolation device.

[0014] Optionally, a force transmission plate is further provided between the spring vibration isolation assembly and the embedded structure to increase the contact area between the spring vibration isolation assembly and the embedded structure, and the force transmission plate is provided with a clearance hole that is consistent with the inner hole of the embedded structure.

[0015] By adopting the above technical solution, the force-bearing area between the spring vibration isolation component and the embedded structure can be increased, the stress concentration caused to local positions of the embedded structure can be reduced, and the local pressure damage to the embedded structure can be reduced.

[0016] Optionally, the elastic component is one of a cylindrical helical spring, polyurethane, or rubber.

[0017] By adopting the above technical solution, the elastic components can be selected as needed. While ensuring that the elastic components have appropriate elasticity and vibration isolation performance, the vibration isolation requirements of the floating track bed vibration isolation device can also be met.

[0018] Optionally, the sealing housing includes a large cylinder fixed to the upper force transmission member and a small cylinder fixed to the lower force transmission member, with the large cylinder sleeved on the small cylinder.

[0019] By adopting the above technical solution, the sealing shell adopts a structure in which a large cylinder is sleeved on a small cylinder. This structure can not only be sleeved on the elastic component to protect the elastic component, but also adapt to the relative movement between the upper force transmission component and the lower force transmission component to a certain extent.

[0020] Optionally, it also includes a horizontal limiting ring sleeved on the lower force transmission member, the inner wall of the horizontal limiting ring abutting against the lower force transmission member, and the outer wall of the horizontal limiting ring abutting against the inner wall of the installation channel.

[0021] By adopting the above technical solution, the horizontal limiting ring is sleeved on the lower force transmission component, with its inner wall abutting against the lower force transmission component and its outer wall abutting against the inner wall of the installation channel. This can limit the horizontal displacement of the lower force transmission component and improve the stability and reliability of the floating track bed vibration isolation device.

[0022] Optionally, the lower force transmission component has an installation groove on the side away from the elastic component, and a horizontal limiting block is installed in the installation groove. The side of the horizontal limiting block away from the lower force transmission component is used to embed into the foundation.

[0023] By adopting the above technical solution, the lower force transmission component can be horizontally limited, thereby improving the stability of the floating track bed vibration isolation device.

[0024] Optionally, the cross-section of the horizontal limiting block is not circular.

[0025] By adopting the above technical solution, the non-circular horizontal limiting block can better restrict the circumferential displacement of the lower force transmission component and enhance the stability of the vibration isolation device.

[0026] Optionally, an auxiliary plate is fixedly connected to one side of the lower force transmission component, and a second horizontal limiting block is fixedly connected to the auxiliary plate. The second horizontal limiting block is used to embed into the foundation.

[0027] By adopting the above technical solutions, installation needs in different scenarios can be met.

[0028] In summary, this application includes at least one of the following beneficial technical effects: 1. The embedded structure made of concrete allows it to be cast integrally with the floating track bed during construction, making it more convenient to manufacture. Compared with the support sleeve made of steel, it does not require hot-dip galvanizing for corrosion protection, thus reducing costs. 2. The elastic components and sealed housing design of the spring vibration isolation assembly can effectively absorb or buffer the vibration energy of the track, reducing the vibration and noise generated by the track being subjected to hard impacts; 3. By changing the force transmission method, the forces on the floating track bed are not applied to the spring vibration isolation components through the embedded structure. This reduces stress concentration in the embedded structure and prevents local damage, thereby increasing its service life and the overall service life of the floating track bed. Attached Figure Description

[0029] Figure 1 This is a schematic diagram to illustrate the existing vibration isolator structure.

[0030] Figure 2 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0031] Figure 3 This is a schematic diagram to illustrate the shape of the hollow structure and the spring vibration isolation component in the embedded structure.

[0032] Figure 4 yes Figure 2 Enlarged diagram of point A in the middle.

[0033] Figure 5 This is a schematic diagram of the overall structure of Embodiment 2 of this application.

[0034] Figure 6 This is a schematic diagram to illustrate the relative positions of the embedded structure and the spring vibration isolation component in Embodiment 2.

[0035] Explanation of reference numerals in the attached drawings: 1. Floating track bed; 2. Foundation; 3. Support sleeve; 31. Support step; 32. Support surface; 4. Spring vibration isolation assembly; 41. Lower force transmission component; 411. Mounting groove; 42. Upper force transmission component; 43. Elastic component; 44. Sealing shell; 441. Large cylinder; 442. Small cylinder; 45. Force transmission plate; 451. Clearance hole; 46. Leveling pad; 47. Horizontal limiting ring; 48. Horizontal limiting block; 5. Embedded structure. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 2-6 This application will be described in further detail.

[0037] This application discloses a vibration isolation device for a floating track bed 1, which is installed between the foundation 2 and the floating track bed 1, and an installation channel is provided on the floating track bed 1.

[0038] Example 1 Reference Figure 2 A vibration isolation device for a floating track bed 1 includes a fixed structure 5 installed within the installation channel of the floating track bed 1 and a spring vibration isolation component 4 installed between the foundation 2 and the floating track bed 1. The fixed structure 5 is made of concrete and can be integrally cast with the floating track bed 1, making manufacturing more convenient and cost-effective. The fixed structure 5 has a hollow channel running vertically through it, allowing the spring vibration isolation component 4 to pass through and be supported on it. This allows the force exerted on the floating track bed 1 by the train to be transmitted to the spring vibration isolation component 4 through the fixed structure 5, achieving a buffering and vibration isolation effect. Because the fixed structure 5 is made of concrete, it is less expensive than traditional steel support sleeves 3, and concrete has better durability, which can improve the service life of the entire vibration isolation device.

[0039] Reference Figure 2 and Figure 3 The inner hole size of the embedded structure 5 is consistent with the outer wall size of the spring vibration isolation component 4. Both are non-circular, and can be rectangular, square, triangular, irregular, etc. This allows the inner hole direction of the spring vibration isolation component 4 to be aligned with that of the embedded structure 5 during installation, so that the spring vibration isolation component 4 can be installed on the foundation 2. Then, by rotating the spring vibration isolation component 4, the length direction of the spring vibration isolation component 4 can be misaligned with the length direction of the inner hole of the embedded structure 5, thereby fixing the relative position of the spring vibration isolation component 4 and the embedded structure 5, so that the spring vibration isolation component 4 can support the embedded structure 5.

[0040] Reference Figure 2 and Figure 4 The spring vibration isolation assembly 4 includes a lower force transmission member 41 mounted on the foundation 2, an upper force transmission member 42 abutting against the embedded structure 5, an elastic component 43 fixed between the upper force transmission member 42 and the lower force transmission member 41, and a sealing shell 44 fixed between the upper force transmission member 42 and the lower force transmission member 41. The sealing shell 44 is sleeved on the elastic component 43 to protect the elastic component 43.

[0041] The elastic component 43 can be a cylindrical helical spring, a disc spring, or a leaf spring, etc., which has good elasticity and cushioning performance. The elastic component 43 can also be made of polyurethane, which has good flexibility and energy absorption characteristics, and can also play a role in cushioning and vibration isolation. Of course, the elastic component 43 can also be other elastic materials that can meet the vibration isolation requirements, such as rubber, damping materials, etc., as long as they can play a role in cushioning and vibration isolation.

[0042] Reference Figure 4 The sealing housing 44 includes a large cylinder 441 fixed to the upper force transmission member 42 and a small cylinder 442 fixed to the lower force transmission member 41, with the large cylinder 441 sleeved on the small cylinder 442. The large cylinder 441 and the small cylinder 442 can be slidably fitted together. When the elastic component 43 deforms, the large cylinder 441 and the small cylinder 442 can slide relative to each other. At the same time, the sealing housing 44 can prevent dust, moisture, etc. from entering the elastic component 43, thus extending the service life of the elastic component 43.

[0043] A force transmission plate 45 is also provided between the spring vibration isolation component 4 and the embedded structure 5 to increase the contact area between them. The force transmission plate 45 has a clearance hole 451 in its center that matches the inner hole of the embedded structure 5, facilitating the smooth installation of the elastic component 43. The force transmission plate 45 is typically a metal plate, such as a steel plate, and its shape can be designed according to the contact area between the embedded structure 5 and the spring vibration isolation component 4 to make the force transmission more uniform and reduce local stress concentration.

[0044] The outer wall of the force transmission plate 45 can extend into the floating track bed 1, which increases the contact area between the spring vibration isolation assembly 4 and the embedded structure 5, reducing stress concentration and preventing damage to the embedded structure 5. Secondly, the force transmission plate 45 can also support the embedded structure 5, increasing its overall support strength. Thirdly, it allows the force on the floating track bed 1 to be transmitted to the spring vibration isolation assembly 4 through the force transmission plate 45, dispersing the force on the embedded structure 5 and improving its overall service life.

[0045] The force transmission plate 45 can be made of precast concrete slab with internal steel reinforcement, which can improve the overall support strength.

[0046] Reference Figure 2 and Figure 4 The elastic vibration isolation assembly also includes a leveling pad 46 disposed on the side of the upper force transmission component 42 away from the elastic component 43. There can be one leveling pad 46, or multiple leveling pads 46 stacked together as needed. The leveling pad 46 can be a rubber pad or a metal pad. By adjusting the number and thickness of the leveling pads 46, the spring vibration isolation assembly 4 and the embedded structure 5 can be better fitted together, ensuring uniform force transmission. Simultaneously, the elevation of the floating track bed 1 can be adjusted as needed to meet the installation requirements of different scenarios.

[0047] Reference Figure 4A horizontal limiting ring 47 is also fitted onto the lower force transmission component 41. The inner wall of the horizontal limiting ring 47 abuts against the lower force transmission component 41, and the outer wall of the horizontal limiting ring 47 abuts against the inner wall of the installation channel of the floating track bed 1. The horizontal limiting ring 47 is generally made of polytetrafluoroethylene, which has wear-resistant properties, low friction, and a certain rigidity, and can limit the horizontal displacement of the lower force transmission component 41 to ensure the stability of the spring vibration isolation assembly 4.

[0048] It is understandable that the overall shape of the horizontal limiting member 47 can be determined according to the shape of the gap between the lower force transmission member 41 and the installation channel of the floating track bed 1. For example, if the lower force transmission member 41 is circular and the installation channel is also circular, then the horizontal limiting member 47 as a whole will be annular.

[0049] Among them, an installation groove 411 is provided on the side of the lower force transmission component 41 away from the elastic component 43. A horizontal limiting block 48 is installed in the installation groove 411. The side of the horizontal limiting block 48 away from the lower force transmission component 41 is used to embed into the foundation 2 to play a horizontal limiting role for the lower force transmission component 41.

[0050] The horizontal limiting block 48 can be cylindrical, serving only a horizontal limiting function. Alternatively, the outer cross-section of the horizontal limiting block 48 can be non-circular, allowing it to provide both horizontal and circumferential limiting for the lower force transmission component 41, preventing rotation of the lower force transmission component 41 on the foundation 2 and further improving the stability of the vibration isolation device.

[0051] The implementation principle of Embodiment 1 of this application is as follows: The vibration isolation device for the floating track bed 1 in this embodiment effectively buffers and isolates the forces experienced by the floating track bed 1 during train operation through the cooperation of the concrete embedded structure 5 and the spring vibration isolation assembly 4. The concrete embedded structure 5 is low in cost and has good durability, which can improve the service life of the entire device. The elastic component 43 in the spring vibration isolation assembly 4 can absorb and buffer vibration energy, and the sealed shell 44 can protect the elastic component 43. Components such as the force transmission plate 45, leveling pad 46, horizontal limiting ring 47, and horizontal limiting block 48 further improve the stability and uniformity of force transmission of the device. Compared with the prior art, it can better reduce track vibration and noise, and ensure the stability and safety of train operation.

[0052] Example 2 Reference Figure 5 and Figure 6 The difference between this embodiment and Embodiment 1 is that the position of the horizontal limiting block 48 is different.

[0053] In this embodiment, the hollow channel on the embedded structure 5 is opened on one side of the embedded structure 5, so that during installation, the spring vibration isolation component 4 can be inserted into the hollow channel of the embedded structure 5 and slid to the bottom of the embedded structure 5 to fix the relative position of the spring vibration isolation component 4 and the floating track bed 1.

[0054] In this embodiment, the spring vibration isolation component 4 is located below the embedded structure 5. One side of the spring vibration isolation component 4 is attached to the floating track bed 1, and the other side is close to the hollow channel of the embedded structure 5. Therefore, in this embodiment, the horizontal limiting ring 47 can be a ring-shaped sleeve on the lower force transmission member 41. The horizontal limiting ring 47 can also be a strip-shaped arrangement between the lower force transmission member 41 and the floating track bed 1. The specific choice can be made according to the needs.

[0055] In this embodiment, since the spring vibration isolation assembly 4 is located entirely below the embedded structure 5, the force transmission plate 45 structure can be eliminated.

[0056] Meanwhile, in this embodiment, an auxiliary plate is fixedly connected to one side of the lower force transmission member 41, and a horizontal limiting block 48 is fixedly connected to the auxiliary plate, so that it can adapt to the installation scenario where the hollow channel of the embedded structure 5 is on one side, and the range of adaptability is wider.

[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A vibration isolation device for a floating track bed, disposed between a foundation (2) and a floating track bed (1), wherein an installation channel is provided on the floating track bed (1), characterized in that: The system includes a fixed structure (5) installed in the installation channel and a spring vibration isolation assembly (4) installed between the foundation (2) and the floating track bed (1). The fixed structure (5) is a concrete fixed structure (5). The fixed structure (5) has a hollow channel for the spring vibration isolation assembly (4) to pass through. The fixed structure (5) is supported on the spring vibration isolation assembly (4). The spring vibration isolation assembly (4) includes a lower force transmission member (41) installed on the foundation (2), an upper force transmission member (42) abutting against the fixed structure (5), and an elastic component (43) fixed between the upper force transmission member (42) and the lower force transmission member (41).

2. The floating track bed vibration isolation device according to claim 1, characterized in that: A sealing housing (44) is provided between the upper force transmission member (42) and the lower force transmission member (41), and the sealing housing (44) is sleeved on the elastic component (43).

3. The floating track bed vibration isolation device according to claim 1, characterized in that: The elastic vibration isolation assembly also includes a leveling pad (46) disposed on the side of the upper force transmission member (42) away from the elastic assembly (43).

4. The floating track bed vibration isolation device according to claim 3, characterized in that: Multiple leveling pads (46) are provided.

5. The floating track bed vibration isolation device according to claim 1, characterized in that: A force transmission plate (45) is also provided between the spring vibration isolation assembly (4) and the embedded structure (5) to increase the contact area between the spring vibration isolation assembly (4) and the embedded structure (5). The force transmission plate (45) is provided with a clearance hole (451) that is consistent with the inner hole of the embedded structure (5).

6. The floating track bed vibration isolation device according to claim 1, characterized in that: The elastic component (43) is one of a cylindrical helical spring, polyurethane, or rubber.

7. The floating track bed vibration isolation device according to claim 1, characterized in that: The sealed housing (44) includes a large cylinder (441) fixed to the upper force transmission member (42) and a small cylinder (442) fixed to the lower force transmission member (41), wherein the large cylinder (441) is sleeved on the small cylinder (442).

8. The floating track bed vibration isolation device according to claim 1, characterized in that: It also includes a horizontal limiting ring (47) sleeved on the lower force transmission member (41), the inner wall of the horizontal limiting ring (47) abutting against the lower force transmission member (41), and the outer wall of the horizontal limiting ring (47) abutting against the inner wall of the installation channel.

9. The floating track bed vibration isolation device according to claim 1, characterized in that: The lower force transmission member (41) has an installation groove (411) on the side away from the elastic component (43). A horizontal limiting block (48) is installed in the installation groove (411). The side of the horizontal limiting block (48) away from the lower force transmission member (41) is used to embed into the foundation (2).

10. The floating track bed vibration isolation device according to claim 1, characterized in that: An auxiliary plate is fixedly connected to one side of the lower force transmission component (41), and a horizontal limiting block (48) is fixedly connected to the auxiliary plate.

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