Track vibration and noise reduction integrated device

Abstract

The rail vibration and noise reduction integrated device comprises a damping body and a sound absorption plate, steel rails are installed on a rail plate through the damping body, one side of the damping body protrudes upwards to form a first clamping edge wrapping the 1 / 2 position of the outer side face of each steel rail, the outer edge face of each damping body is wrapped with a restraint layer, and the sound absorption plate is installed on the portion, between the steel rails, of the rail plate. According to the rail vibration and noise reduction integrated device, the damping body is fixedly restrained on the surface and the bottom of the steel rail through the restraint layer and is tightly attached to the surface of the steel rail, and the surface of the sound absorption plate is designed to be of a honeycomb structure with continuous holes or small wedges of a concave-convex structure; the novel acoustic board is promoted to generate broadband response to sound waves, noise of a high-frequency wave band can be absorbed, the noise is reflected in the porous structure of the novel acoustic board, and therefore the better noise reduction effect is achieved.

Description

Technical Field

[0001] The present invention relates to the field of rail transit technology, and more specifically, to an integrated track vibration and noise reduction device. Background Art

[0002] With the rapid development of rail transit in my country, many rail transit lines pass through residential and office areas. The resulting vibration and noise affect the living and working environment of surrounding residents. At the same time, the severe vibration also reduces the riding experience of train passengers. The vibration and noise of the train mainly come from the vibration between the wheel and rail. Solving the vibration and noise at the source of the wheel and rail is the most direct and effective measure to control its impact on the environment. Devices that solve the noise problem from the source include dampers and roadbed sound-absorbing panels.

[0003] The current status of these two devices:

[0004] ① Common rail dampers are usually made by gluing rubber to the belly of the rail and then gluing a steel plate to increase the vibration mass and achieve a damping effect. However, there must be good adhesion between the rubber and the rail, and between the rubber and the iron plate. If the bonding interface is detached, the vibration reduction effect will be greatly reduced and the service life will be short.

[0005] ② The surface of the traditional sound-absorbing board is a flat sound-absorbing material, and the installation method is relatively simple, using the original direct placement and positioning method. The sound absorption effect is ordinary and it is easy to cause the sound-absorbing board to shift or fall off due to the impact of airflow caused by vibration when the train runs at high speed.

[0006] Therefore, it is necessary to propose an integrated track vibration and noise reduction device to solve the problems of short life and easy falling off of existing dampers and sound-absorbing panels, which is of great significance to improving the track vibration and noise reduction effect. Summary of the invention

[0007] The present invention provides an integrated track vibration and noise reduction device which can directly reduce vibration and noise from the track area closest to the noise source, so as to solve the problems that the existing dampers and sound absorbing panels are easy to fall off during use, have a short service life and are inconvenient to install and maintain.

[0008] According to one aspect of the present invention, there is provided an integrated track vibration and noise reduction device, comprising a damping body and a sound absorbing plate, wherein the rails are mounted on the track plate through the damping body, and one side of the damping body protrudes upward to form a first clamping edge covering 1 / 2 of the outer side surface of the rails, a restraining layer is covered on the outer edge surface of the damping body, and the sound absorbing plate is mounted on the track plate between the rails.

[0009] Preferably, based on the above solution, the other side of the damping body extends outward to form a mounting edge, a mounting hole is provided on the mounting edge, and a bolt is installed in the mounting hole to connect with the track plate.

[0010] Preferably, based on the above solution, the damping body protrudes upward on one side close to the mounting edge to form a second clamping edge covering 1 / 2 of the outer side surface of the rail.

[0011] Preferably, based on the above solution, the first clamping edge and the second clamping edge form a clamping groove covering the bottom of the rail.

[0012] Preferably, based on the above solution, the rail is a manganese-containing rail, a carbon steel rail or a high-silicon copper-containing steel rail, and the constraining layer corresponds to the material of the rail.

[0013] Preferably, based on the above solution, the surface of the sound absorbing plate is provided with protrusions capable of absorbing noise in the high-frequency band, and sound absorbing grooves are provided between adjacent protrusions.

[0014] Preferably, based on the above solution, a plurality of evenly distributed sound absorbing holes are provided on the surface of the sound absorbing plate.

[0015] Preferably, based on the above scheme, the cross section of the sound absorbing groove is porous, concave-convex or wedge-shaped.

[0016] Preferably, based on the above solution, the end surface of one side provided with the sound absorbing groove is in contact with the sound absorbing plate.

[0017] Preferably, based on the above solution, the damping body is a rubber damping body or a polyurethane damping body.

[0018] The invention discloses an integrated track vibration reduction and noise reduction device, which uses a constraint layer to fix and constrain the damping body on the surface and bottom of the rail, and fits tightly to the surface of the rail. The surface of the sound-absorbing board is designed to be a honeycomb structure with continuous pores or a small wedge with a concave-convex structure, so that the new sound-absorbing board can produce a broadband response to sound waves, absorb noise in the high-frequency band, and reflect it in its porous structure, thereby achieving a better noise reduction effect.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. The structural form and installation method of the damping body constraint layer are increased, which increases the durability of the traditional damping body and maintains a better vibration reduction effect for a longer time.

[0021] 2. Changing the traditional flat sound-absorbing panel structure to a porous, concave-convex or small wedge structure improves the sound absorption performance of the traditional ballast sound-absorbing panel and changes the installation method to make it more stable.

[0022] 3. The ballast sound-absorbing panels and the dampers on both sides of the tracks are integrated together, which further increases the stability and durability of the device and prevents the airflow generated by the passage of high-speed trains from shifting or lifting the ballast sound-absorbing panels. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0024] Figure 1 It is a structural schematic diagram of the integrated track vibration and noise reduction device of the present invention;

[0025] Figure 2 This is a first state diagram of the damper in the integrated track vibration and noise reduction device of the present invention;

[0026] Figure 3 This is a second state diagram of the damper in the integrated track vibration and noise reduction device of the present invention;

[0027] Figure 4 It is a three-dimensional structural diagram of the guide plate of the sound absorbing plate of the present invention;

[0028] Figure 5 It is a three-dimensional structural diagram of the swirl disk form of the sound absorbing plate of the present invention;

[0029] Figure 6 It is a three-dimensional structural diagram of a small wedge-shaped sound-absorbing plate of the present invention;

[0030] Description of Figure Numbers:

[0031] 1. Damping body;

[0032] 11. first clamping edge; 12. second clamping edge; 13. constraint layer; 14. mounting edge; 15. bolt; 16. clamping groove; 18. vibration damping pipe;

[0033] 2. Sound absorbing board;

[0034] 21. Noise protrusion; 22. Sound absorption groove; 23. Sound absorption hole;

[0035] 3. Track plate;

[0036] 4. Rails

[0037] 17. Sound absorbing panel bolts. DETAILED DESCRIPTION

[0038] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0039] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections.

[0040] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0041] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0042] In the embodiments shown in the drawings, the indications of directions (such as up, down, left, right, front and back) used to explain the structure and movement of the various components of the present invention are not absolute but relative. These descriptions are appropriate when these components are in the positions shown in the drawings. If the descriptions of the positions of these components change, the indications of these directions also change accordingly.

[0043] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0045] See also Figure 1 , and combined with Figure 2 and Figure 3 As shown, an integrated track vibration and noise reduction device of the present invention includes a damping body 1 and a sound absorbing plate 2. The rail is installed on the track plate 3 through the damping body 1, and one side of the damping body 1 protrudes upward to form a first clamping edge 11 covering 1 / 2 of the outer side surface of the rail. The outer edge surface of the damping body 1 is covered with a constraint layer 13, and the sound absorbing plate 2 is installed on the track plate 3 between the rails.

[0046] The rail of the present invention is a standard part, that is, rail grooves are arranged on both sides thereof. The first clamping edge 11 formed by the upward protrusion of the damping body 1 of the present invention is covered in the side end rail groove of the rail. On the one hand, it can effectively absorb the vibration energy generated by the interaction between the wheel-rail and the rail, reduce the resonance amplitude of the rail, and thus reduce the sound radiation generated by the wheel-rail collision; on the other hand, it can also effectively stabilize the connection strength between the rail and the track plate 3.

[0047] At the same time, combined with the function of the sound absorbing plate 2, the purpose of sound absorption and noise reduction can be effectively improved. Figure 1 As shown, in the present invention, a vibration-damping tube 18 is embedded in the damping body 1, and a sound-absorbing body is embedded in the vibration-damping tube 18, and the sound-absorbing body is a liquid such as water.

[0048] That is, by configuring the energy-absorbing damping tube 18, the vibration is transmitted to the wave, friction and collision effect of the liquid to produce the damping effect, which has the effect of maximizing the vibration sound absorption effect.

[0049] It should be noted that the vibration-damping tube 18 extends along the length direction of the damping body 1. As a preferred embodiment of the present invention, the cross-section of the vibration-damping tube 18 of the present invention can be rectangular to reduce the vibration in the vertical direction, or it can be an arc-shaped structure so that it can absorb not only the vertical vibration but also the horizontal vibration. When the vibration-damping tube 18 is formed into a curved shape, the greater the curvature, the more it can absorb vibrations in all directions, thereby further improving the noise reduction effect.

[0050] In order to further improve the installation strength of the damping body 1 and avoid the loosening of the damping body 1 caused by the vibration of the rail and the steel wheel, the damping body 1 of the present invention can generally be made of a durable material with parameters such as tensile strength similar to those of the rail, such as a manganese-containing rail, a carbon steel rail or a high-silicon copper-containing steel rail, and the constraint layer 13 corresponds to the material of the rail, such as manganese-containing steel, carbon steel or high-silicon copper-containing steel. Among them, the other side of the damping body 1 extends outward to form a mounting edge 14, and the mounting edge 14 is provided with a mounting hole, and a bolt 15 is installed in the mounting hole to connect with the track plate 3.

[0051] In order to further improve its noise reduction and installation and fixing effect, the damping body 1 of the present invention is convex upward near the mounting edge 14 to form a second clamping edge 12 covering the outer side 1 / 2 of the rail. The first clamping edge 11 and the second clamping edge 12 form a clamping groove 16 covering the bottom of the rail. For specific structure, please refer to Figure 2 and Figure 3 shown.

[0052] When in use, it can be fixed on both sides or one side of the rail waist as needed. When a vehicle passes by, the vibration energy generated by the wheel-rail impact will be partially absorbed by the damping layer, reducing the resonance amplitude of the rail, thereby reducing the sound radiation generated by the wheel-rail impact.

[0053] As a preferred embodiment of the present invention, the damping body 1 of the present invention is a rubber damping body 1 or a polyurethane damping body 1 .

[0054] Please continue to refer to the figure Figure 4 , Figure 5 and Figure 6 As shown, the surface of the sound absorbing plate 2 of the present invention is provided with protrusions 21 capable of absorbing noise in the high-frequency band, sound absorbing grooves 22 are provided between adjacent protrusions, and the surface of the sound absorbing plate 2 is provided with a plurality of evenly distributed sound absorbing holes 23. Such noise protrusions 21 can absorb noise in the high-frequency band and reflect it in the structure of the plurality of sound absorbing holes 23, thereby achieving the effect of noise reduction.

[0055] Preferably, the cross section of the sound absorbing groove 22 is wavy, and in order to improve the sound absorption effect thereof, the end surface of one side provided with the sound absorbing groove 22 is bonded to the sound absorbing plate 2 in the present invention.

[0056] The integrated track vibration and noise reduction device of the present invention improves the vibration and noise reduction effects near the track while having better durability and a more convenient installation method, thus saving installation and maintenance costs.

[0057] The present invention can effectively reduce the wheel-rail impact vibration and noise from the source, reduce further transmission to the surrounding environment, and enhance the damping performance, stability and durability compared to traditional dampers. The new roadbed sound absorbing panel 2 of the device can further reduce the noise from the source of the noise between the rails, and has better water permeability and durability than the traditional sound absorbing panel 2, thereby extending its service life. Therefore, the integrated device reduces the installation cost, improves the noise reduction and vibration reduction effect, and has better durability.

[0058] Compared with the prior art, the present invention has the following advantages:

[0059] The sound-absorbing plate in the present device is a traditional sound-absorbing plate 2 whose surface is set to a honeycomb structure with continuous pores or a small wedge with a concave-convex structure, so that the new sound-absorbing plate 2 can produce a broadband response to sound waves, absorb noise in the high-frequency band, and reflect it in the porous structure of the sound-absorbing holes 23, thereby achieving a better noise reduction effect.

[0060] At the same time, this porous, concave-convex or small wedge structure can make the new sound absorbing board 2 have a better water permeability effect, thereby extending the service life of the sound absorbing board 2. The roadbed sound absorbing board 2 is fixed evenly or at both ends on the steel plate and the beam surface with bolts 15 and is integrated with the damper device installed on the tracks on both sides, which to a certain extent reduces the displacement or falling of the sound absorbing board 2 caused by the impact of vibration airflow when the train is running at high speed.

[0061] Finally, the method of the present application is only a preferred implementation scheme and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A track vibration and noise reduction integrated device, characterized in that: It includes a damping body and a sound absorbing plate. The rails are installed on the track plate through the damping body, and one side of the damping body protrudes upward to form a first clamping edge covering 1 / 2 of the outer side surface of the rails. The outer edge surface of the damping body is covered with a constraint layer. The sound absorbing plate is installed on the track plate between the rails.

2. The integrated track vibration and noise reduction device according to claim 1, characterized in that: The other side of the damping body extends outward to form a mounting edge, and a mounting hole is arranged on the mounting edge. Bolts are installed in the mounting hole to connect with the track plate.

3. The integrated track vibration and noise reduction device according to claim 2, characterized in that: The damping body protrudes upwards on one side close to the mounting edge to form a second clamping edge covering 1 / 2 of the outer side surface of the rail.

4. The integrated track vibration and noise reduction device according to claim 3, characterized in that: The first clamping edge and the second clamping edge form a clamping groove covering the bottom of the rail.

5. The integrated track vibration and noise reduction device according to claim 1, characterized in that: The rail is a manganese-containing rail, a carbon steel rail or a high-silicon copper-containing steel rail, and the constraining layer corresponds to the material of the rail.

6. The integrated track vibration and noise reduction device according to claim 1, characterized in that: The surface of the sound absorbing plate is provided with protrusions capable of absorbing noise in the high-frequency band, and sound absorbing grooves are provided between adjacent protrusions.

7. The integrated track vibration and noise reduction device according to claim 6, characterized in that: The surface of the sound absorbing plate is provided with a plurality of evenly distributed sound absorbing holes.

8. The integrated track vibration and noise reduction device according to claim 6, characterized in that: The cross section of the sound absorbing groove is porous, concave-convex or has a small wedge shape.

9. The integrated track vibration and noise reduction device according to claim 6, characterized in that: The end surface on one side where the sound absorbing groove is provided is in contact with the sound absorbing plate.

10. The integrated track vibration and noise reduction device according to claim 6, characterized in that: The damping body is a rubber damping body or a polyurethane damping body.

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