CN220377142U - Silencing channel type windproof sound barrier structure - Google Patents
Silencing channel type windproof sound barrier structure Download PDFInfo
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- CN220377142U CN220377142U CN202321774462.XU CN202321774462U CN220377142U CN 220377142 U CN220377142 U CN 220377142U CN 202321774462 U CN202321774462 U CN 202321774462U CN 220377142 U CN220377142 U CN 220377142U
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- 230000004888 barrier function Effects 0.000 title claims abstract description 74
- 230000030279 gene silencing Effects 0.000 title claims abstract description 52
- 230000008030 elimination Effects 0.000 claims abstract description 35
- 238000003379 elimination reaction Methods 0.000 claims abstract description 35
- 238000013016 damping Methods 0.000 claims description 25
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 5
- 238000001179 sorption measurement Methods 0.000 claims description 5
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 239000006260 foam Substances 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 abstract description 8
- 238000009413 insulation Methods 0.000 abstract description 3
- 239000003570 air Substances 0.000 description 17
- 238000010586 diagram Methods 0.000 description 7
- 230000009467 reduction Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000011358 absorbing material Substances 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920001821 foam rubber Polymers 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000001743 silencing effect Effects 0.000 description 1
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- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The utility model relates to the technical field of sound barriers of high-speed railways, in particular to a silencing channel type windproof sound barrier structure. The sound-absorbing device comprises a sound-shielding plate, wherein the sound-shielding plate comprises a plurality of sound-absorbing units distributed in an array form, the sound-absorbing units are obliquely arranged on the sound-shielding plate, and each sound-absorbing unit comprises a sound-absorbing channel and a Helmholtz resonant cavity communicated with the side wall of the sound-absorbing channel. According to the technical scheme, the sound barrier plate is provided with the plurality of sound elimination units, the sound elimination units comprise the sound elimination channels for the train wind to pass through, when the train wind reaches the sound barrier plate, the train wind can flow to the outer side of the sound barrier through the sound elimination channels through the diversion holes, partial wind pressure is unloaded, and wind pressure load borne by the sound barrier plate is reduced. The structure not only has sound insulation and sound absorption functions, but also can guide transverse train wind, reduce transverse wind load borne by the sound barrier plate and prevent the sound barrier from being blown down by wind so as to generate potential safety hazard.
Description
Technical Field
The utility model relates to the technical field of sound barriers of high-speed railways, in particular to a silencing channel type windproof sound barrier structure.
Background
Along with the continuous development of high-speed railways, when trains pass at high speed, train noise sources such as wheel track noise, pneumatic noise, electromechanical noise and the like can be outwards spread through air, and noise pollution is generated along the environment. Noise pollution generated by trains is increasingly focused, and the arrangement of a sound barrier is an effective means for solving the problem of noise pollution along the railway. The noise pollution problem along the line can be greatly relieved by arranging the sound barrier beside the line, and the wind pressure load can be generated on the sound barrier by transverse train wind generated by the high-speed passing train, so that the traditional sound barrier is easy to damage under the action of strong transverse wind load, and the risk of being easily blown down by strong wind is caused, so that potential safety hazards are generated for other structures or nearby personnel.
The design ideas of wind-proof sound barriers currently applied to the railway industry are divided into two types: one is to design the sound barrier in a shutter type, and wind can flow through gaps among the blades, so that the direct cross wind action of the sound barrier plate is reduced, and the gaps among the blades reduce the noise reduction effect of the sound barrier; one such reinforcement means secures the sound barrier, which reduces the risk of the sound barrier being blown off by wind, but does not reduce the load on the sound barrier panel.
Disclosure of Invention
The utility model aims at: aiming at the technical defects that the noise reduction effect of the sound barrier of the shutter structure in the prior art is common and the load resisting capacity of the sound barrier in the prior art is weak, the noise elimination channel type wind-proof sound barrier structure is provided.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a sound barrier structure is prevent wind to noise elimination passageway formula, includes the sound barrier board, include the noise elimination unit that a plurality of array form distributes on the sound barrier board, noise elimination unit is in slope setting on the sound barrier board, every noise elimination unit include noise elimination passageway and with the helmholtz resonant cavity of noise elimination passageway lateral wall intercommunication.
According to the technical scheme, the sound-damping units are arranged on the sound-shielding plate, wherein the sound-damping units comprise the sound-damping channels for the train wind to pass through, when the train wind reaches the sound-shielding plate, the train wind can flow to the outer side of the sound-shielding plate through the sound-damping channels through the air inlets, partial wind pressure is unloaded, and wind pressure load borne by the sound-shielding plate is reduced. The pipe wall of the silencing channel is also communicated with a Helmholtz resonant cavity, and the integral structure is used for untwining and guiding transverse train wind through a plurality of channels which are periodically arranged; meanwhile, the channels form a silencing channel inside the sound barrier plate, the pipeline is connected with the Helmholtz resonant cavity, and resonance sound absorption in a wide frequency range is realized by designing multiple groups of geometric parameters of the resonant cavity. The structure not only has sound insulation and sound absorption functions, but also can guide transverse train wind, reduce transverse wind load borne by the sound barrier plate and prevent the sound barrier from being blown down by wind so as to generate potential safety hazard.
As a preferable scheme of the utility model, each silencing unit comprises two silencing channels with the same structure, the two silencing channels are arranged in parallel, the silencing channels are obliquely arranged on the sound barrier plate, each silencing channel comprises two ports, wherein one end with a lower position is an air inlet, and the other end with a higher position is an air outlet.
Each section of the silencing channel can be rectangular or other shapes, such as a circular section, the helmholtz resonator can be arranged on any one side wall, and the helmholtz resonators can be arranged at intervals along any one side wall of the silencing channel. Depending on the thickness of the sound barrier panel.
As a preferable scheme of the utility model, the Helmholtz resonant cavity is communicated with the silencing channel through a short pipe.
Preferably, the short tube and the helmholtz resonator are both cylindrical structures, and the diameter of the short tube is smaller than that of the helmholtz resonator. The geometric parameters of the helmholtz resonator can be designed to realize the resonance sound absorption of a wide frequency range.
As a preferable scheme of the utility model, an expansion cavity is also arranged on the side wall of each silencing channel. The expansion chamber plays a role in resistance and noise elimination. The size of the expansion cavity in the silencing channel, the inclination angle of the silencing channel and the horizontal plane, the aperture size and the distribution density can be flexibly designed according to the wind load intensity and the noise reduction requirement.
The expansion cavity is a resistive muffler because the cross-sectional area in the muffling channel and thus the acoustic impedance changes due to the expansion cavity. When the incident acoustic wave reaches the expansion chamber, a portion of the acoustic energy is reflected back into the incoming flow direction conduit, thereby dissipating the acoustic energy.
As a preferable scheme of the utility model, the inner side wall of the noise elimination channel is provided with an adsorption layer, and the adsorption layer is an aluminum fiber layer or a foamed aluminum layer. The sound absorbing material is capable of forming a resistive muffler. When sound waves enter the pores of the sound absorption material, air and fiber vibration of the material in the pores are caused, and due to friction and viscous resistance, the sound energy is converted into heat energy to be dissipated, so that the purpose of silencing is achieved.
As a preferable mode of the utility model, the silencing units are distributed in a rectangular array mode, adjacent silencing units are arranged at intervals in the transverse direction, and adjacent silencing units are arranged in contact in the longitudinal direction.
As a preferable mode of the utility model, a baffle plate is arranged at the top of the sound barrier plate, the baffle plate is obliquely arranged, and the baffle plate is obliquely arranged towards the air inlet side relative to the sound barrier plate.
As a preferable scheme of the utility model, a base is arranged at the bottom of the sound barrier plate 1, upright posts are vertically arranged at two sides of the base, and the sound barrier plate is fixed between the adjacent upright posts. A reinforcing rib plate is arranged between the base and the sound barrier plate.
In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:
1. the utility model provides an acoustic barrier plate, which is used for untangling and guiding transverse train wind by arranging a silencing channel on the acoustic barrier plate; an expansion cavity is also arranged in the pipeline to play a role in resisting and silencing; the wall surface of the channel is adhered with sound absorbing material to play a role of resistive noise elimination.
2. The size, the inclination angle of the expansion cavity in the silencing channel, the aperture size and the distribution density of the silencing channel can be flexibly designed according to the wind load intensity and the noise reduction requirement. The silencing channel is connected with the Helmholtz resonant cavity, and multiple groups of resonant cavity geometric parameters can be designed to realize resonance sound absorption in a wide frequency range.
3. The composite noise elimination unit provided by the utility model can be used for unloading wind pressure to improve the structural safety and simultaneously ensuring the noise elimination and noise reduction functions. The supporting upright posts and the bottom base on two sides of the sound barrier plate and the reinforcing rib plate play a role in installing and fixing the wind-proof sound barrier structure of the silencing pipeline. The whole structure is stable, and the sound barrier is prevented from being blown off by wind, so that potential safety hazards are generated.
Drawings
Fig. 1 is a schematic diagram of the front structure of the present utility model.
FIG. 2 is a schematic diagram of a cross-sectional test structure according to the present utility model.
FIG. 3 is an enlarged view of section A of the present utility model;
FIG. 4 is a schematic diagram of the frontal structure of the sound damping channel of the present utility model (comprising 4-directional Helmholtz resonators);
FIG. 5 is a schematic diagram of the frontal structure of the sound damping channel of the present utility model (containing 3-directional Helmholtz resonators);
FIG. 6 is a schematic diagram of the frontal structure of the sound damping channel of the present utility model (containing a 1-way Helmholtz resonator);
fig. 7 is a schematic view of another view of the sound damping channel of the present utility model.
Icon: the device comprises a 1-sound barrier plate, a 2-silencing unit, a 21-silencing channel, a 22-Helmholtz resonant cavity, a 23-short pipe, a 24-expansion cavity, a 3-air inlet, a 4-air outlet, a 5-adsorption layer, a 6-baffle plate, a 7-pedestal, 71-upright posts and 8-reinforcing rib plates.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings.
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Example 1
The embodiment discloses a wind-proof sound barrier structure of a sound elimination channel 21, as shown in fig. 1-7, the wind-proof sound barrier structure comprises a sound barrier plate 1, the sound barrier plate 1 comprises a plurality of sound elimination units 2 distributed in an array form, the sound elimination units 2 are obliquely arranged on the sound barrier plate 1, and each sound elimination unit 2 comprises a sound elimination channel 21 and a helmholtz resonant cavity 22 communicated with the side wall of the sound elimination channel 21. Specifically, the muffler channels 21 have two ends, respectively, and the air inlet 3 is located on the lower side and the air outlet 4 is located on the higher side.
Each silencing unit 2 comprises two silencing channels 21 with the same structure, the two silencing channels 21 are arranged in parallel, and at least one helmholtz resonant cavity 22 is arranged on each silencing channel 21.
As shown in fig. 3, one silencing unit 2 includes two silencing channels 21, the two silencing channels 21 are in an up-down structure, a containing space of a helmholtz resonator 22 is arranged between the two silencing channels 21, in this embodiment, each silencing channel 21 is provided with a helmholtz resonator 22, and the helmholtz resonators 22 are communicated with the silencing channels 21 through short tubes 23. As shown in fig. 6, specifically, the short tube 23 and the helmholtz resonator 22 are both cylindrical, and the diameter of the short tube 23 is smaller than that of the helmholtz resonator 22. As shown in fig. 7, multiple sets of geometric parameters of the helmholtz resonator 22 may be designed to achieve resonance absorption over a wide frequency range.
Each of the silencing channels 21 has a rectangular cross section, the helmholtz resonator 22 can be disposed on any one of the side walls, and the helmholtz resonators 22 can be disposed at intervals along any one of the side walls of the silencing channel 21. Depending on the thickness of the sound barrier panel 1.
An expansion chamber 24 is also provided on the side wall of each of the sound-damping passages 21. The expansion chamber 24 acts as a resistive muffler. The size of the expansion cavity 24 in the silencing channel 21, the inclination angle of the silencing channel 21 and the horizontal plane, the aperture size and the distribution density can be flexibly designed according to the wind load strength and the noise reduction requirement. The expansion chamber 24 is a resistive muffler because the cross-sectional area, and thus the acoustic impedance, of the muffling channel 21 changes due to the expansion chamber 24. When the incident acoustic wave reaches the expansion chamber 24, a portion of the acoustic energy is reflected back into the incoming flow direction conduit, thereby dissipating the acoustic energy.
When the sound wave reaches the helmholtz resonator, the air in the resonator may be regarded as an "air spring" when the sound wave wavelength is much greater than the length of the junction. Under the action of sound waves, the air column in the short connecting pipe performs reciprocating vibration of a piston. During vibration, the acoustic energy is converted to thermal energy and dissipated due to the damping action of the short tube walls against the air. If the frequency of the incident sound wave is consistent with the natural frequency of the resonant cavity, the resonance phenomenon can occur, and the air column amplitude in the short tube is the largest, so that the sound energy is dissipated the most, and the silencing effect is achieved.
The inside lateral wall of noise elimination passageway 21 is provided with adsorbed layer 5, adsorbed layer 5 is aluminium fibre layer or foam aluminium layer. The sound absorbing material is capable of forming a resistive muffler. When sound waves enter the pores of the sound absorption material, air and fiber vibration of the material in the pores are caused, and due to friction and viscous resistance, the sound energy is converted into heat energy to be dissipated, so that the purpose of silencing is achieved.
The silencing units 2 are distributed in a rectangular array mode, adjacent silencing units 2 are arranged at intervals in the transverse direction, and adjacent silencing units 2 are arranged in a contact mode in the longitudinal direction. Specifically, a certain interval is provided between two adjacent muffler units 2 in the transverse direction, and the interval can also be used as an accommodating space of the helmholtz resonator 22. When a plurality of helmholtz resonance chambers 22 are required to be arranged on each sound deadening passageway 21, the left and right side walls of the sound deadening passageway 21 are arranged.
The top of the sound barrier plate 1 is provided with a baffle plate 6, the baffle plate 6 is obliquely arranged, and the baffle plate 6 is inclined towards the air inlet 3 side relative to the sound barrier plate 1. The bottom of sound barrier board 1 is provided with base 7, the both sides of base 7 are vertical to be provided with stand 71, sound barrier board 1 is fixed in between the stand 71. A reinforcing rib 8 is provided between the base 7 and the upright 71.
The sound insulation performance of the sound barrier plate 1 is improved by filling foam rubber or other high polymer materials into the inner sound-damping channel 21, the Helmholtz resonant cavity 22 and the cavity outside the expansion cavity 24 of the sound barrier plate 1.
Example 2
In this embodiment, three helmholtz resonance cavities are disposed on each sound damping channel, and a schematic diagram of the sound damping channel is shown in fig. 5.
Example 3
In this embodiment, four helmholtz resonance cavities are disposed on each silencing channel, and a schematic diagram of the silencing channels is shown in fig. 4. The setting position of this noise elimination passageway is located the top surface or the bottom surface end position of noise elimination unit.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (9)
1. The wind-proof sound barrier structure of a sound-damping channel comprises a sound barrier plate (1), and is characterized in that the sound barrier plate (1) comprises a plurality of sound-damping units (2) distributed in an array form, and each sound-damping unit (2) comprises a sound-damping channel (21) and a Helmholtz resonant cavity (22) communicated with the side wall of the sound-damping channel (21); each silencing unit (2) comprises two silencing channels (21) with the same structure, the two silencing channels (21) are arranged in parallel, the silencing channels (21) are obliquely arranged on the sound barrier plate (1), each silencing channel (21) comprises two ports, one end with a lower position is an air inlet (3), and the other end with a higher position is an air outlet (4).
2. The noise elimination channel type wind-proof sound barrier structure according to claim 1, wherein a cross section of each noise elimination channel (21) is rectangular, the helmholtz resonance cavities (22) can be arranged on a side wall of any one noise elimination channel (21), and the helmholtz resonance cavities (22) can be arranged at intervals along a length direction of any one noise elimination channel (21).
3. The sound-damping channel-type wind-proof sound barrier structure according to claim 1, wherein the helmholtz resonator (22) is communicated with the sound-damping channel (21) through a short pipe (23).
4. A sound-damping channel-type wind-resistant sound barrier structure according to claim 3, characterized in that the short tube (23) and the helmholtz resonator (22) are both cylindrical structures, the diameter of the short tube (23) being smaller than the diameter of the helmholtz resonator (22).
5. The sound-damping channel-type wind-proof sound barrier structure according to claim 1, characterized in that an expansion chamber (24) is further provided on the side wall of each sound-damping channel (21).
6. The noise elimination channel type wind-proof sound barrier structure according to claim 1, wherein an adsorption layer (5) is arranged on the inner side wall of the noise elimination channel (21), and the adsorption layer (5) is an aluminum fiber layer or an aluminum foam layer.
7. The noise elimination channel type wind-proof sound barrier structure according to claim 1, wherein the noise elimination units (2) are distributed in a rectangular array, adjacent noise elimination units (2) are arranged at intervals in a transverse direction, and adjacent noise elimination units (2) are arranged in contact in a longitudinal direction.
8. The sound-damping channel type wind-proof sound barrier structure according to any one of claims 1-7, wherein a baffle (6) is provided at the top of the sound barrier plate (1), the baffle (6) is inclined, and the baffle (6) is inclined toward the air inlet (3) side with respect to the sound barrier plate (1).
9. The sound-damping channel type windproof sound barrier structure according to claim 8, wherein a base (7) is arranged at the bottom of the sound barrier plate (1), upright posts (71) are vertically arranged at two sides of the base (7), the sound barrier plate (1) is fixed between the adjacent upright posts (71), and reinforcing rib plates (8) are arranged between the base (7) and the upright posts (71).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321774462.XU CN220377142U (en) | 2023-07-06 | 2023-07-06 | Silencing channel type windproof sound barrier structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321774462.XU CN220377142U (en) | 2023-07-06 | 2023-07-06 | Silencing channel type windproof sound barrier structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220377142U true CN220377142U (en) | 2024-01-23 |
Family
ID=89571975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321774462.XU Active CN220377142U (en) | 2023-07-06 | 2023-07-06 | Silencing channel type windproof sound barrier structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220377142U (en) |
-
2023
- 2023-07-06 CN CN202321774462.XU patent/CN220377142U/en active Active
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