CN115467261B - Arch totally enclosed sound insulation barrier - Google Patents

Arch totally enclosed sound insulation barrier Download PDF

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Publication number
CN115467261B
CN115467261B CN202211157578.9A CN202211157578A CN115467261B CN 115467261 B CN115467261 B CN 115467261B CN 202211157578 A CN202211157578 A CN 202211157578A CN 115467261 B CN115467261 B CN 115467261B
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CN
China
Prior art keywords
sound insulation
sound
channel
air
plate
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CN202211157578.9A
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CN115467261A (en
Inventor
甘成
洪少华
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Chengdu Weiteng Environmental Protection Technology Co ltd
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Chengdu Weiteng Environmental Protection Technology Co ltd
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Publication of CN115467261A publication Critical patent/CN115467261A/en
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01FADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F8/00Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic

Abstract

The application relates to an arch-shaped totally-enclosed sound insulation barrier, which belongs to the technical field of sound insulation barriers, and comprises a plurality of support frames which are arranged on a road at intervals, wherein a sound insulation plate is fixedly arranged between two adjacent support frames; the support frame is including setting up in the stand of road both sides and fixing the arch pole that sets up on two stands, and the air intake has been seted up to the opposite flank of two stands, and the air outlet has been seted up to the back of two stands, has seted up the wind channel that gives sound insulation that is used for intercommunication air intake and air outlet in the stand, and the wind channel that gives sound insulation is including the air inlet passageway, the passageway of circling round and the air outlet passageway that communicate in proper order, and the passageway of circling round is the cavity of cylinder type, and the center rotation of passageway of circling round is provided with inhales the sound post. The rotary channel has a certain reduction on wind power, reduces the effect of wind load on the sound insulation plate, and prolongs the service life of the sound insulation plate; meanwhile, the sound absorption column can filter the passing noise to a certain extent, so that the noise transmission is reduced.

Description

Arch totally enclosed sound insulation barrier
Technical Field
The application relates to the technical field of sound insulation barriers, in particular to an arched full-closed sound insulation barrier.
Background
With the development of the economy in China, the number of domestic automobiles is continuously increased, and the construction of urban roads, highways, inter-urban light rails and high-speed railways also enters a high-speed development period. However, while providing traffic convenience, the traffic noise generated thereby adversely affects the health and life of surrounding residents. A sound-insulating barrier is generally used, i.e. a sound-insulating barrier is interposed between the sound source and the receiver, so that the sound wave propagates with a significant additional attenuation, thereby reducing the noise effect in a certain area where the receiver is located. The existing sound insulation barrier is arched and totally enclosed, and can better play a sound insulation effect.
With respect to the related art in the above, there are the following drawbacks: when a vehicle runs on a road, the sound insulation barrier can act as a certain obstruction to air movement, and damage to the sound insulation barrier caused by excessive wind force in the sound insulation barrier is easy to cause.
Disclosure of Invention
In order to effectively prolong the service life of the sound insulation plate, the application provides an arched full-closed sound insulation barrier.
The application provides an arch totally enclosed sound insulation barrier adopts following technical scheme:
an arched totally-enclosed sound insulation barrier comprises a plurality of support frames which are arranged on a road at intervals, and a sound insulation plate is fixedly arranged between two adjacent support frames; the support frame is including setting up in the stand of road both sides and fixing the arch pole that sets up on two stands, two the air intake has been seted up to the opposite flank of stand, two the air outlet has been seted up to the back of stand opposite flank, set up the wind channel that gives sound insulation that is used for intercommunication air intake and air outlet in the stand, the wind channel that gives sound insulation is including the air inlet passageway, the passageway of circling round and the air-out passageway of intercommunication in proper order, the passageway of circling round is cylindrical cavity, the center rotation of passageway of circling round is provided with inhales the sound post.
Through adopting above-mentioned technical scheme, support frame and acoustic celotex board cooperate, can form confined arch structure on the road to realize the sound insulation around the road. Wind power generated when the vehicle moves enters the sound insulation air duct from the air inlet, and the wind power is discharged from the air outlet channel after being guided to rotate through the inner wall of the rotary channel, so that the wind power is reduced to a certain extent, the effect of wind load on the sound insulation board is reduced, and the service life of the sound insulation board is prolonged; meanwhile, the sound absorption column can filter the passing noise to a certain extent, so that the noise transmission is reduced.
Optionally, a partition plate for partitioning the air outlet channel is rotatably arranged on the inner wall of the air outlet channel, and a positioning block for limiting the free end of the partition plate to rotate towards the air inlet is fixedly arranged on the inner wall of the air outlet channel; the rotary shaft of the partition plate is sleeved with a torsion spring, one end of the torsion spring is fixedly arranged on the partition plate, and the other end of the torsion spring is fixedly arranged on the inner wall of the air outlet channel.
By adopting the technical scheme, the partition plate is matched with the positioning block, so that the air outlet channel can be partitioned, and the wind power outside the sound insulation barrier is reduced from entering the sound insulation barrier; meanwhile, according to the wind power in the sound insulation barrier, the rotation angles of the partition plates can be different, so that the size of a channel through which wind power passes by the wind outlet channel is adjusted, and noise transmitted along with the wind power is better filtered in the sound insulation air channel.
Optionally, a plurality of sound absorbing strips parallel to the rotating shaft of the dividing plate are fixedly arranged on the side face, facing the positioning plate, of the dividing plate.
Through adopting above-mentioned technical scheme, wind-force when passing through the division board, the sound absorbing strip can further filter the noise to reduce the propagation of noise.
Optionally, an air collecting plate is fixedly arranged on one side of the upright post, which is positioned at the air inlet, and the air collecting plate is obliquely arranged towards the driving-in direction of the vehicle; and a rain baffle is fixedly arranged above the air outlet on the upright post.
By adopting the technical scheme, the air collecting plate can guide the air flow in the sound insulation barrier, so that the air flow in the sound insulation barrier better enters the sound insulation channel; the rain baffle can reduce rainwater entering into the sound insulation channel for the sound insulation channel can play better sound insulation and amortization effect.
Optionally, the structure of the air inlet channel is the same as that of the air outlet channel, the cross section of the cavity of the air inlet channel is gradually reduced, and the left wall and the right wall of the air inlet channel are tangential to the inner wall of the rotary channel.
Through adopting above-mentioned technical scheme, the structure setting of air inlet passageway and air-out passageway can make wind-force get into the passageway that circles round from the air inlet passageway to through the inner wall guide rotation back of passageway that circles round from the air-out passageway discharge, thereby let the better sound post of inhaling of noise filter, the propagation of noise reduction.
Optionally, the inner walls of the air inlet channel and the air outlet channel are coated with sound insulation layers.
Through adopting above-mentioned technical scheme, wind-force is when passing through inlet channel and air-out passageway, and the noise is transmitted away through the body of stand to the reduction.
Optionally, two adjacent opposite sides of support frame have all been seted up and have been used for the male jack-in groove of end of acoustic celotex board, the acoustic celotex board is including being located the dull and stereotyped of inhaling of sound between two stands and being located the arc abatvoix between two arch poles, the both ends of arc abatvoix are fixed to be provided with and are used for cup jointing the outer sound insulation sleeve board of inhaling the dull and stereotyped.
Through adopting above-mentioned technical scheme, the sound insulation sleeve board can cover the junction of inhaling the sound flat board and arc abatvoix, reduces noise and propagates away from inhaling the clearance between sound flat board and the arc abatvoix to make the sound insulation barrier play better sound insulation effect.
Optionally, the accommodating groove is formed in one side, facing the sound absorbing flat plate, of the sound insulating sleeve plate, and the sealing strip is fixedly arranged in the accommodating groove.
Through adopting above-mentioned technical scheme, the sealing effect between sound insulation sleeve board and the sound absorption flat board can be increased to the sealing strip, and the holding tank can reduce the condition that the sealing strip drops from sound insulation sleeve board to increase the sound insulation effect of sound insulation barrier.
Optionally, the side of stand has offered the screw hole that is linked together with the jack groove, threaded connection has the bolt with inhale the dull and stereotyped surface of sound and offset in the screw hole.
Through adopting above-mentioned technical scheme, the screw hole cooperatees with the bolt, can fix the tip of acoustic celotex board at the grafting inslot, reduces the condition that acoustic celotex board drops from the support frame.
In summary, the present application includes at least one of the following beneficial technical effects:
1. through support frame and acoustic celotex board matched with, can form confined arch structure on the road to realize the sound insulation around the road. Wind power generated when the vehicle moves enters the sound insulation air duct from the air inlet, and the wind power is discharged from the air outlet channel after being guided to rotate through the inner wall of the rotary channel, so that the wind power is reduced to a certain extent, the effect of wind load on the sound insulation board is reduced, and the service life of the sound insulation board is prolonged; meanwhile, the sound absorption column can filter the passing noise to a certain extent, so that the transmission of the noise is reduced;
2. the partition plate is matched with the positioning block, and can partition the air outlet channel, so that the wind power outside the sound insulation barrier is reduced from entering the sound insulation barrier; meanwhile, according to the wind power in the sound insulation barrier, the rotation angles of the partition plates can be different, so that the size of a channel through which wind power passes by the wind outlet channel is adjusted, and noise transmitted along with the wind power is better filtered in the sound insulation air channel.
Drawings
Fig. 1 is a schematic structural view of an arched totally enclosed sound barrier according to an embodiment of the present application;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is an enlarged view of portion B of FIG. 1;
FIG. 4 is a partial cross-sectional view of a riser and acoustic duct in an embodiment of the present application;
FIG. 5 is an enlarged view of portion C of FIG. 4;
reference numerals illustrate: 1. a support frame; 2. a column; 3. an arched rod; 4. a sound insulation board; 41. a sound absorbing panel; 42. an arc-shaped sound absorbing plate; 5. an air inlet; 6. an air outlet; 7. a sound insulation air duct; 71. an air inlet channel; 72. a convolute channel; 73. an air outlet channel; 8. a sound-absorbing column; 9. a dividing plate; 10. a positioning block; 11. a torsion spring; 12. a sound absorbing strip; 13. a wind collecting plate; 14. a rain shield; 15. a sound insulation layer; 16. a plug-in groove; 17. a sound insulating sleeve plate; 18. a receiving groove; 19. a sealing strip; 20. a threaded hole; 21. a bolt; 22. a base; 23. a mounting hole; 24. and a cover plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to fig. 1 to 5 and the embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The embodiment of the application discloses an arch totally enclosed sound insulation barrier.
Referring to fig. 1 and 2, the sound insulation barrier comprises a plurality of supporting frames 1 which are arranged on a road at intervals, and a sound insulation plate 4 is fixedly arranged between two adjacent supporting frames 1; the support frame 1 comprises upright posts 2 arranged on two sides of a road and an arch rod 3 fixedly arranged on the two upright posts 2. In the embodiment, the upright post 2 adopts a hollow rectangular steel column, the bottom end of the upright post 2 is fixedly welded with a base 22, and the top end of the upright post 2 is fixedly welded with a cover plate 24; the upright 2, the base 22 and the cover plate 24 are matched, so that a hollow cavity is formed in the upright 2. Four mounting holes 23 are formed in the base 22, and the upright posts 2 can be fixed on two sides of a road through the mounting holes 23.
Referring to fig. 1 and 3, for better installation of the acoustic panel 4, the opposite sides of the two adjacent support frames 1 are respectively provided with a plugging slot 16 for insertion of the end of the acoustic panel 4, the acoustic panel 4 comprises an acoustic panel 41 positioned between the two upright posts 2 and an arc acoustic panel 42 positioned between the two arched rods 3, and two ends of the arc acoustic panel 42 are fixedly provided with acoustic panels 17 for sleeving outside the acoustic panel 41. In this embodiment, the sound absorbing flat plate 41, the arc-shaped sound absorbing plate 42 and the sound insulating cover plate 17 are all transparent acrylic plates, wherein the sound insulating cover plate 17 is integrally formed at the end of the arc-shaped sound absorbing plate 42. The joint of the sound absorbing flat plate 41 and the arc-shaped sound absorbing plate 42 can be covered by the sound insulating sleeve plate 17, and noise is reduced from being transmitted out from the gap between the sound absorbing flat plate 41 and the arc-shaped sound absorbing plate 42, so that the sound insulating barrier has a better sound insulating effect.
Referring to fig. 1 and 3, in order to increase the sound insulation effect of the sound insulation barrier, the sound insulation cover 17 is provided with a receiving groove 18 on a side facing the sound absorption plate 41, and a sealing strip 19 is fixedly provided in the receiving groove 18. In this embodiment, the sealing strip 19 is fixed in the accommodating groove 18 by using strong glue, the sealing effect between the sound insulation sleeve plate 17 and the sound absorbing flat plate 41 can be increased by the sealing strip 19, and the situation that the sealing strip 19 falls off from the sound insulation sleeve plate 17 can be reduced by the accommodating groove 18.
Referring to fig. 1 and 2, in order to reduce the falling-off of the baffle plate 4 from the support frame 1, a screw hole 20 communicating with the insertion groove 16 is formed in the side surface of the pillar 2, and a bolt 21 abutting against the surface of the sound absorbing flat plate 41 is screwed into the screw hole 20. In the present embodiment, the screw holes 20 are located on the inner side of the sound insulation barrier, and the screw holes 20 are engaged with the bolts 21, so that the end portions of the sound insulation board 4 can be fixed in the insertion grooves 16.
Referring to fig. 4 and 5, in order to exhaust wind force in the sound insulation barrier, air inlets 5 are formed on opposite sides of the two upright posts 2, air outlets 6 are formed on opposite sides of the two upright posts 2, and a sound insulation air duct 7 for communicating the air inlets 5 with the air outlets 6 is formed in the upright posts 2. In this embodiment, the air inlet 5 is located at the bottom of the upright post 2, the air outlet 6 is located at the top of the upright post 2, and the air inlet 5 and the air outlet 6 are all communicated with the sound insulation air duct 7 by adopting six round holes. Wind power in the sound insulation barrier enters the sound insulation air duct 7 from the air inlet 5 and is discharged from the air outlet channel 73, so that the wind power is reduced to a certain extent, the effect of wind load on the sound insulation plate 4 is reduced, and the service life of the sound insulation plate 4 is prolonged.
Referring to fig. 4 and 5, in order to make the air flow better enter the sound insulation channel, a wind collecting plate 13 is fixedly arranged on one side of the upright post 2, which is positioned at the air inlet 5, and the wind collecting plate 13 is obliquely arranged towards the direction of the vehicle; a rain shield 14 is fixedly arranged above the air outlet 6 on the upright post 2. In the embodiment, the air collecting plate 13 and the rain baffle 14 are fixed on the outer side of the upright post 2 in a welding mode, and air flow in the sound insulation barrier can be guided through the air collecting plate 13, so that the air flow in the sound insulation barrier better enters the sound insulation channel; rainwater can be reduced from entering the sound insulation channel through the rain shield 14, so that the sound insulation channel can have better sound insulation and silencing effects.
Referring to fig. 4 and 5, in order to perform noise filtration on the air flow entering the soundproof passage, the soundproof air duct 7 includes an air inlet passage 71, a swirl passage 72 and an air outlet passage 73 which are sequentially communicated, the swirl passage 72 is a cylindrical cavity, and a sound absorbing column 8 is rotatably provided at the center of the swirl passage 72. In this embodiment, the sound insulation air duct 7 may be one or a plurality of sequentially connected; the wind force is discharged from the air outlet channel 73 after being guided to rotate by the inner wall of the rotary channel 72, and the wind force can be reduced to a certain extent.
Referring to fig. 4 and 5, in order to further reduce the propagation of noise, the air inlet channel 71 has the same structure as the air outlet channel 73, the cross section of the cavity of the air inlet channel 71 is gradually reduced, and the left and right walls of the air inlet channel 71 are tangential to the inner wall of the swirl channel 72; the inner walls of the air inlet channel 71 and the air outlet channel 73 are coated with a sound insulation layer 15. In this embodiment, through the structural arrangement of the air inlet channel 71 and the air outlet channel 73, wind power can enter the convolution channel 72 from the air inlet channel 71, and is discharged from the air outlet channel 73 after guided to rotate through the inner wall of the convolution channel 72, so that noise is better filtered by the sound absorption column 8, and the propagation of the noise is reduced. At the same time, the sound insulation layer 15 reduces noise in the sound insulation duct 7 from propagating out through the body of the upright post 2.
Referring to fig. 4 and 5, for better noise filtering in the soundproof duct 7, the inner wall of the air outlet channel 73 is rotatably provided with a partition plate 9 for partitioning the air outlet channel 73, and the inner wall of the air outlet channel 73 is fixedly provided with a positioning block 10 for restricting the rotation of the free end of the partition plate 9 in the direction of the air inlet 5; the torsion spring 11 has been cup jointed in the pivot of division board 9, and the one end of torsion spring 11 is fixed to be set up on division board 9, and the other end is fixed to be set up in the inner wall of air-out passageway 73. In the embodiment, the positioning block 10 is fixed on the inner wall of the air outlet channel 73 in a welding manner, and the air outlet channel 73 can be partitioned by matching the partition plate 9 with the positioning block 10, so that wind power outside the sound insulation barrier is reduced from entering the sound insulation barrier; meanwhile, according to the wind power in the sound insulation barrier, the rotation angles of the partition plates 9 can be different, so that the size of a channel through which wind power passes by the wind outlet channel 73 is adjusted, and noise transmitted along with the wind power is better filtered in the sound insulation air channel 7.
Referring to fig. 4 and 5, in order to reduce the propagation of noise in the air outlet duct 73, a plurality of sound absorbing strips 12 parallel to the rotation axis of the division plate 9 are fixedly provided on the side surface of the division plate 9 facing the positioning plate. In this embodiment, the sound absorbing strips 12 are fixed on the surface of the partition plate 9 in an adhesive manner, and when wind passes through the partition plate, the sound absorbing strips 12 can further filter noise, so that the noise transmission is reduced.
The implementation principle of the arched full-closed sound insulation barrier provided by the embodiment of the application is as follows: wind power generated during vehicle movement enters the sound insulation air duct 7 from the air inlet 5, and the wind power is discharged from the air outlet channel 73 after being guided to rotate through the inner wall of the rotary channel 72, so that the wind power is reduced to a certain extent, the effect of wind load on the sound insulation plate 4 is reduced, and the service life of the sound insulation plate 4 is prolonged; meanwhile, the sound-absorbing column 8 can filter the passing noise to a certain extent, so that the transmission of the noise is reduced.
The foregoing description of the preferred embodiments of the present application is not intended to limit the scope of the application, in which any feature disclosed in this specification (including abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.

Claims (6)

1. The arched totally-enclosed sound insulation barrier is characterized by comprising a plurality of support frames (1) which are arranged on a road at intervals, wherein a sound insulation plate (4) is fixedly arranged between two adjacent support frames (1); the support frame (1) comprises upright posts (2) arranged on two sides of a road and arch-shaped rods (3) fixedly arranged on the two upright posts (2), air inlets (5) are formed in opposite side surfaces of the two upright posts (2), air outlets (6) are formed in opposite side surfaces of the two upright posts (2), a sound insulation air duct (7) used for communicating the air inlets (5) with the air outlets (6) is formed in the upright posts (2), the sound insulation air duct (7) comprises an air inlet channel (71), a rotary channel (72) and an air outlet channel (73) which are sequentially communicated, the rotary channel (72) is a cylindrical cavity, and a sound absorption column (8) is arranged in the center of the rotary channel (72) in a rotary mode; the inner wall of the air outlet channel (73) is rotatably provided with a partition plate (9) for partitioning the air outlet channel (73), and the inner wall of the air outlet channel (73) is fixedly provided with a positioning block (10) for limiting the free end of the partition plate (9) to rotate towards the air inlet (5); a torsion spring (11) is sleeved on the rotating shaft of the partition plate (9), one end of the torsion spring (11) is fixedly arranged on the partition plate (9), and the other end of the torsion spring is fixedly arranged on the inner wall of the air outlet channel (73); a plurality of sound absorbing strips (12) parallel to the rotating shaft of the dividing plate (9) are fixedly arranged on the side surface of the dividing plate (9) facing the positioning plate; the structure of the air inlet channel (71) is the same as that of the air outlet channel (73), the cross section of the cavity of the air inlet channel (71) is gradually reduced, and the left wall and the right wall of the air inlet channel (71) are tangential with the inner wall of the rotary channel (72).
2. The arched totally-enclosed sound insulation barrier according to claim 1, wherein a wind collecting plate (13) is fixedly arranged on one side of the upright post (2) positioned at the air inlet (5), and the wind collecting plate (13) is obliquely arranged towards the driving-in direction of a vehicle; the stand column (2) is fixedly provided with a rain shield (14) above the air outlet (6).
3. An arched, totally enclosed sound-insulating barrier according to claim 1, characterized in that the inner walls of the air inlet channel (71) and the air outlet channel (73) are coated with a sound-insulating layer (15).
4. An arch-shaped totally-enclosed sound insulation barrier according to claim 1, wherein the opposite side surfaces of two adjacent supporting frames (1) are provided with inserting grooves (16) for inserting the end parts of sound insulation plates (4), the sound insulation plates (4) comprise sound absorption flat plates (41) positioned between two upright posts (2) and arc-shaped sound absorption plates (42) positioned between two arch-shaped rods (3), and two ends of each arc-shaped sound absorption plate (42) are fixedly provided with sound insulation sleeve plates (17) which are sleeved outside the sound absorption flat plates (41).
5. The arched full-closed sound insulation barrier according to claim 4, wherein a containing groove (18) is formed in one side, facing the sound absorption flat plate (41), of the sound insulation sleeve plate (17), and a sealing strip (19) is fixedly arranged in the containing groove (18).
6. The arched full-closed sound insulation barrier according to claim 4, wherein a threaded hole (20) communicated with the plugging groove (16) is formed in the side surface of the upright post (2), and a bolt (21) propped against the surface of the sound absorption flat plate (41) is connected in the threaded hole (20) in a threaded manner.
CN202211157578.9A 2022-09-22 2022-09-22 Arch totally enclosed sound insulation barrier Active CN115467261B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211157578.9A CN115467261B (en) 2022-09-22 2022-09-22 Arch totally enclosed sound insulation barrier

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Application Number Priority Date Filing Date Title
CN202211157578.9A CN115467261B (en) 2022-09-22 2022-09-22 Arch totally enclosed sound insulation barrier

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CN115467261A CN115467261A (en) 2022-12-13
CN115467261B true CN115467261B (en) 2024-03-15

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116949963B (en) * 2023-09-18 2024-01-02 山西军昊实业有限公司 Cylindrical integrated totally-enclosed sound barrier

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208545684U (en) * 2018-06-05 2019-02-26 中铁十五局集团电气化工程有限公司 A kind of sound barrier
CN110512538A (en) * 2019-08-28 2019-11-29 深圳市双禹王声屏障工程技术有限公司 A kind of arch totally enclosed type noise barrier
CN212247935U (en) * 2020-05-13 2020-12-29 陈墨涵 Composite sound barrier for expressway
CN217325099U (en) * 2022-04-24 2022-08-30 山东高速交通科技有限公司 Noise control trackside sound barrier device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208545684U (en) * 2018-06-05 2019-02-26 中铁十五局集团电气化工程有限公司 A kind of sound barrier
CN110512538A (en) * 2019-08-28 2019-11-29 深圳市双禹王声屏障工程技术有限公司 A kind of arch totally enclosed type noise barrier
CN212247935U (en) * 2020-05-13 2020-12-29 陈墨涵 Composite sound barrier for expressway
CN217325099U (en) * 2022-04-24 2022-08-30 山东高速交通科技有限公司 Noise control trackside sound barrier device

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