A highway sound barrier sound absorbing board

By designing the limiting mechanism, adjustment structure, cleaning mechanism and fixing mechanism on the sound-absorbing plate of the highway sound barrier, the problem of the existing sound-absorbing plate needs to be replaced after the road surface is widened, and the flexible adjustment and installation efficiency of the sound-absorbing plate is achieved. The improvement reduces costs and workload.

CN116289682BActive Publication Date: 2025-02-11HUNAN KUNJI CONSTR GRP CO LTD
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Patent Information

Application Number
CN202310196674.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-03-03
Publication Date
2025-02-11
Estimated Expiration
2043-03-03

AI Technical Summary

Technical Problem

The existing highway sound barrier sound absorbing plate needs to be replaced after the road surface is widened, resulting in a large amount of labor consumption, high cost and low functionality.

Method used

A highway sound barrier sound absorbing plate is designed, including a board frame, a limiting mechanism, an adjustment structure, a cleaning mechanism and a fixing mechanism. Through the combination of these structures, the flexible adjustment of the sound absorbing plate and the improvement of the installation efficiency are achieved.

Benefits of technology

Through the rotatable and adjustable plate surface and built-in sound absorbing cotton design, the sound absorbing plate can adjust the fixed angle according to the noise level, reducing installation workload and cost, while improving sound absorption effect.

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Abstract

The invention discloses a highway sound barrier sound absorbing board, specifically comprising: a board frame, a top groove is opened on the top of the board frame, the inner surface of the top groove is slidably connected to a limiting mechanism, vertical grooves are opened on the left and right sides of the outer surface of the board frame, the inner surface of the vertical groove is slidably connected to the limiting mechanism through a circular groove, and relates to the field of sound barriers; a limiting mechanism, an adjustment structure, a cleaning mechanism and a fixing mechanism are arranged inside the device, and a cleaning and an adjustable structure are added inside the device respectively. After the traditional sound absorbing board is fixed in position, it cannot be flexibly adjusted. When encountering large road noise, it needs to be replaced as a whole, and the workload is relatively large. By adding a rotatable and adjustable board surface on the top of the device, in addition to the built-in sound absorbing cotton, it can also be rotated and adjusted to a fixed angle, which has a rebound effect on the sound, minimizes the workload during installation, and reduces the waste in cost.
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Description

Technical Field

[0001] The invention relates to the technical field of sound barriers, and in particular to a sound-absorbing plate for a highway sound barrier. Background Art

[0002] Sound barriers are mainly used for sound insulation and noise reduction on roads, highways, elevated composite roads and other noise sources. They are divided into pure sound insulation reflective sound barriers and composite sound barriers that combine sound absorption and sound insulation. The latter is a more effective sound insulation method. It refers to a wall-like structure set up on the side of railways and highways to reduce the impact of driving noise on nearby residents. Soundproof walls are also called sound barriers. Inserting a facility between the sound source and the receiver so that the propagation of sound waves has a significant additional attenuation, thereby reducing the noise impact in a certain area where the receiver is located, such a facility is called a sound barrier. It is divided into traffic sound insulation barriers, equipment noise attenuation sound insulation barriers, industrial plant boundary sound insulation barriers, and roads and highways are the places where various types of sound barriers are used the most.

[0003] The tops of existing highway sound barrier sound-absorbing panels are usually divided into different types, such as vertical and curved, for use on different road surfaces. After the road surface is widened, the roadside sound-absorbing panels also need to be replaced, which requires a lot of man-hours and high costs, and the functionality of the sound-absorbing panels is low. Summary of the invention

[0004] To achieve the above purpose, the present invention is implemented through the following technical solutions: a highway sound barrier sound absorbing board, specifically comprising:

[0005] A plate frame, a top groove is provided on the top of the plate frame, the inner surface of the top groove is slidably connected to a limiting mechanism, vertical grooves are provided on the left and right sides of the outer surface of the plate frame, the inner surface of the vertical groove is slidably connected to the limiting mechanism through a circular groove, a sound insulation board is fixedly connected to the inner surface of the plate frame, a fixing groove is provided on the outer surface of the sound insulation board, the top of the fixing groove is rotatably connected to a rotating shaft, the bottom of the rotating shaft is fixedly connected to a control panel, the outer surface of the control panel is fixedly connected to an adjustment mechanism, the outer surface of the adjustment structure is in contact with the outer surface of the limiting mechanism, the bottom of the control panel is rotatably connected to a bottom shaft, the bottom of the bottom shaft is fixedly connected to a cleaning mechanism, the sound insulation board The outer surface of the plate is evenly provided with through grooves, the inner surface of the through grooves is provided with sound insulation grooves, the inner surface of the through grooves is slidably connected to the outer surface of the cleaning mechanism, the bottom of the plate frame is provided with an inclined groove, the inner surface of the inclined groove is slidably connected to a fixing mechanism; a limiting mechanism, an adjusting structure, a cleaning mechanism and a fixing mechanism are arranged inside the equipment, and a cleaning and adjustable structure are added inside the equipment respectively. After the traditional sound-absorbing panel is fixed in position, it cannot be flexibly adjusted. When encountering high road noise, it needs to be replaced as a whole, which requires a large workload. By adding a rotatable and adjustable panel surface on the top of the equipment, in addition to the built-in sound-absorbing cotton, it can also be rotated and adjusted to a fixed angle.

[0006] The limiting mechanism comprises a connecting column, the outer surface of which is slidably connected to the inner surface of the top groove, and two connecting columns are provided, and elastic sleeve rods are fixedly connected to opposite sides of the two connecting columns.

[0007] Preferably, a sliding rod is slidably connected between opposite sides of the two elastic sleeve rods, a vertical plate is fixedly connected to the top of the sliding rod, and a rotating rod is rotatably connected to the outer surface of the sliding rod.

[0008] Preferably, four rotating rods are provided, and the inner surfaces of the four rotating rods are all provided with arc-shaped grooves, and the inner surfaces of the arc-shaped grooves are clamped and connected with expansion rings.

[0009] Preferably, the outer surface of the rotating rod is rotatably connected to a positioning rod, and the outer surface of the sliding rod is fixedly connected to a connector. By using a limiting mechanism, a limiting structure is provided inside the limiting mechanism, and the expansion ring and the internal connector are used together and respectively fixed on the outer side and the inner side of the connecting piece, the connection effect is better.

[0010] Preferably, the fixing mechanism comprises a side plate, an outer surface of the side plate is slidably connected to an inner surface of the bevel groove, and a pulley is slidably connected to the bottom of the side plate.

[0011] Preferably, a slot is provided on the top of the side plate, a semi-cylinder is fixedly connected to the inner surface of the slot, and an annular ring is slidably connected to the outer surface of the semi-cylinder.

[0012] Preferably, the inner surface of the inclined groove is fixedly connected with a fixing plate, the inner surface of the fixing plate is provided with a dark groove, and the inner surface of the dark groove is rotatably connected with the outer surface of the annular ring. By using the fixing mechanism, a sliding structure is arranged inside the fixing mechanism, and the plate surface is in contact with the ground when being installed, thereby reducing the friction between the plate surface and the ground during installation, and the installation speed is faster.

[0013] Preferably, the cleaning mechanism comprises a retractable rod, the outer surface of which is fixedly connected to the bottom of the bottom shaft, the outer surface of which is slidably connected to the inner surface of the through groove, and the outer surface of which is fixedly connected to a slider.

[0014] Preferably, the outer surface of the slider is fixedly connected to a fixed shell, a transverse groove is formed on the top of the fixed shell, a cleaning roller is rotatably connected to the inner surface of the fixed shell, and a side rod is rotatably connected to the outer surface of the cleaning roller. A cleaning structure with wrapping properties for the through slot is arranged inside the cleaning mechanism, and both sides are connected to the outer sides of the slot to ensure the upper and lower cleaning work.

[0015] Preferably, the adjustment mechanism includes a base, the outer surface of the base is fixedly connected to the outer surface of the control panel, the outer surface of the base is rotatably connected to a telescopic platform, the top of the telescopic platform is rotatably connected to a pull rod, the top of the pull rod is slidably connected to a sliding plate through a slide groove, the outer surface of the sliding plate is rotatably connected to an arc rod, the outer surface of the arc rod is rotatably connected to a top cover, the bottom of the top cover is rotatably connected to the top of the pull rod, and the bottom of the top cover is in contact with the top of the vertical plate. Through the use of the adjustment structure, a structure for controlling the upper and lower sides of the top cover is set inside the adjustment structure, the top plate surface is set to an adjustable state, and road noise is absorbed by rotation.

[0016] The present invention provides a highway sound barrier sound absorbing board, which has the following beneficial effects:

[0017] 1. The highway sound barrier sound-absorbing board is equipped with a limiting mechanism, an adjusting structure, a cleaning mechanism and a fixing mechanism inside the equipment. Cleaning and adjustable structures are added inside the equipment respectively. The traditional sound-absorbing board cannot be flexibly adjusted after the position is fixed. If the road noise is large, it needs to be replaced as a whole, which is a lot of work. By adding a rotatable and adjustable board surface on the top of the equipment, in addition to the built-in sound-absorbing cotton, it can also be rotated and adjusted to a fixed angle, which has a rebound effect on the sound, minimizing the workload during installation and reducing cost waste.

[0018] 2. The highway sound barrier sound-absorbing board, through the use of a limiting mechanism, has a limiting structure set inside the limiting mechanism, and uses an expansion ring and an internal connecting head together, which are respectively fixed on the outside and inside of the connecting piece, so that the connection effect is better, the board surfaces are connected more tightly, and the problem of board surface falling off due to repeated vibrations is reduced.

[0019] 3. The highway sound barrier sound-absorbing board uses a fixing mechanism, and a sliding structure is arranged inside the fixing mechanism. When the board surface is installed, it contacts the ground, reducing the friction between the board surface and the ground during installation, and the installation speed is faster. After installation, the board surface can be pressed down to overlap the hole between the board surface and the ground, and the fixing effect is better.

[0020] 4. The highway sound barrier sound-absorbing board, through the use of a cleaning mechanism, is provided with a wrapping cleaning structure for the through groove inside the cleaning mechanism, and both sides are connected to the two sides outside the groove to ensure that the cleaning stick remains balanced during the upper and lower cleaning work, and one side will not be too high or too low.

[0021] 5. The highway sound barrier sound-absorbing board, through the use of an adjustment structure, is provided with a structure for controlling the upper and lower sides of the top cover inside the adjustment structure, and the top panel is set to an adjustable state. It absorbs road noise by rotation, and solves the width of the road and the noise level in a targeted manner. It does not need to be replaced, which saves more costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the external structure of a highway sound barrier sound absorbing board of the present invention;

[0023] Figure 2 It is a rear view of a highway sound barrier sound absorbing board of the present invention;

[0024] Figure 3 Schematic diagram of the external structure of the limiting mechanism of the present invention;

[0025] Figure 4 It is a partial diagram of the limiting mechanism of the present invention;

[0026] Figure 5 It is a schematic diagram of the external structure of the fixing mechanism of the present invention;

[0027] Figure 6 It is a partial diagram of the fixing mechanism of the present invention;

[0028] Figure 7 It is a schematic diagram of the internal structure of the cleaning mechanism of the present invention;

[0029] Figure 8 It is a schematic diagram of the external structure of the regulating mechanism of the present invention.

[0030] In the figure: 1 plate frame, 2 top groove, 3 limit mechanism, 301 connecting column, 302 elastic sleeve rod, 303 sliding rod, 304 vertical plate, 305 rotating rod, 306 arc groove, 307 expansion ring, 308 positioning rod, 309 connector, 4 vertical groove, 5 sound insulation board, 6 fixed groove, 7 rotating shaft, 8 control board, 9 adjustment structure, 901 base, 902 telescopic table, 903 pull rod, 904 sliding plate, 905 Arc rod, 906 top cover, 10 bottom shaft, 11 cleaning mechanism, 1101 retracting rod, 1102 slider, 1103 fixed sleeve, 1104 cleaning roller, 1105 side rod, 12 through groove, 13 sound insulation groove, 14 inclined groove, 15 fixing mechanism, 1501 side plate, 1502 pulley, 1503 semi-cylinder, 1504 annular ring, 1505 fixed plate, 1506 dark groove, 1507 card slot. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0032] like Figure 1-Figure 8 As shown, the present invention provides a technical solution: The present invention provides a highway sound barrier, specifically comprising:

[0033] A plate frame 1 is provided with a top groove 2 at the top of the plate frame 1, and the inner surface of the top groove 2 is slidably connected to a limiting mechanism 3. Vertical grooves 4 are provided on both sides of the outer surface of the plate frame 1, and the inner surface of the vertical groove 4 is slidably connected to the limiting mechanism 3 through a circular groove. A sound insulation board 5 is fixedly connected to the inner surface of the plate frame 1, and a fixed groove 6 is provided on the outer surface of the sound insulation board 5. A rotating shaft 7 is rotatably connected to the top of the fixed groove 6, and a control panel 8 is fixedly connected to the bottom of the rotating shaft 7. An adjusting mechanism 9 is fixedly connected to the outer surface of the adjusting structure 9, and the outer surface of the limiting mechanism 3 contacts each other. The bottom of the control panel 8 is rotatably connected to A bottom shaft 10 is provided, and a cleaning mechanism 11 is fixedly connected to the bottom of the bottom shaft 10. Through grooves 12 are evenly provided on the outer surface of the sound insulation board 5. Sound insulation grooves 13 are provided on the inner surface of the through grooves 12. The inner surface of the through grooves 12 and the outer surface of the cleaning mechanism 11 are slidably connected to each other. An inclined groove 14 is provided at the bottom of the plate frame 1, and a fixing mechanism 15 is slidably connected to the inner surface of the inclined groove 14. A rotatable and adjustable plate surface is added above the equipment, and in addition to the built-in sound-absorbing cotton, it can also be rotated and adjusted to a fixed angle, which has a rebound effect on the sound, thereby minimizing the workload during installation and reducing cost waste.

[0034] The limiting mechanism 3 includes a connecting column 301 , the outer surface of which is slidably connected to the inner surface of the top groove 2 . Two connecting columns 301 are provided, and elastic sleeve rods 302 are fixedly connected to opposite sides of the two connecting columns 301 .

[0035] A sliding rod 303 is slidably connected between opposite sides of the two elastic sleeve rods 302 , a vertical plate 304 is fixedly connected to the top of the sliding rod 303 , and a rotating rod 305 is rotatably connected to the outer surface of the sliding rod 303 .

[0036] Four rotating rods 305 are provided, and arc grooves 306 are formed on the inner surfaces of the four rotating rods 305 . An expansion ring 307 is clamped and connected to the inner surface of the arc groove 306 .

[0037] The outer surface of the rotating rod 305 is rotatably connected with the positioning rod 308, and the outer surface of the sliding rod 303 is fixedly connected with the connecting head 309. The connection effect is better, the board surfaces are connected more tightly, and the problem of board surfaces falling off due to repeated vibrations is reduced.

[0038] The fixing mechanism 15 includes a side plate 1501 , the outer surface of the side plate 1501 is slidably connected to the inner surface of the inclined groove 14 , and a pulley 1502 is slidably connected to the bottom of the side plate 1501 .

[0039] A slot 1507 is formed on the top of the side plate 1501 . A semi-cylinder 1503 is fixedly connected to the inner surface of the slot 1507 . An annular ring 1504 is slidably connected to the outer surface of the semi-cylinder 1503 .

[0040] The inner surface of the inclined groove 14 is fixedly connected with a fixing plate 1505, and the inner surface of the fixing plate 1505 is provided with a dark groove 1506, and the inner surface of the dark groove 1506 is rotatably connected with the outer surface of the annular ring 1504. The friction between the board and the ground is reduced during installation, and the installation speed is faster. After installation, the board can be pressed downward to overlap the hole between the board and the ground, and the fixing effect is better.

[0041] The cleaning mechanism 11 includes a retractable rod 1101 , the outer surface of which is fixedly connected to the bottom of the bottom shaft 10 , the outer surface of which is slidably connected to the inner surface of the through groove 12 , and the outer surface of which is fixedly connected to a slider 1102 .

[0042] The outer surface of the slider 1102 is fixedly connected to a fixed housing 1103, a transverse groove 1104 is provided on the top of the fixed housing 1103, a cleaning roller 1104 is rotatably connected to the inner surface of the fixed housing 1103, and a side rod 1105 is rotatably connected to the outer surface of the cleaning roller 1104. The cleaning rod 1104 maintains balance without one side being too high or too low.

[0043] The adjustment mechanism 9 includes a base 901, the outer surface of the base 901 is fixedly connected to the outer surface of the control panel 8, the outer surface of the base 901 is rotatably connected to a telescopic platform 902, the top of the telescopic platform 902 is rotatably connected to a pull rod 903, the top of the pull rod 903 is slidably connected to a sliding plate 904 through a slide groove, the outer surface of the sliding plate 904 is rotatably connected to an arc rod 905, the outer surface of the arc rod 905 is rotatably connected to a top cover 906, the bottom of the top cover 906 is rotatably connected to the top of the pull rod 903, and the bottom of the top cover 906 is in contact with the top of the vertical plate 304. The width of the road surface and the noise level are targetedly solved without replacement, which is more cost-saving.

[0044] When in use, when installing the highway sound barrier board, first drill holes in the ground in advance, keep the board surface perpendicular to the ground, slide the side panel 1501 downward, and move it to the bottom along the inside of the inclined groove 14 until multiple pulleys 1502 contact the ground, reducing the friction caused by the board surface moving along the ground. When the pulley 1502 contacts the ground, in order to fix the side panel 1501 and prevent it from shaking, pull up the annular ring 1504, then rotate the annular ring 1504 and then put it on the outer surface of the semi-cylinder 1503. After the side panel 1501 is fixed, the staff manually pushes the entire board surface to move to the inside of the opened hole. At this time, the annular ring 1504 is rotated to leave the outside of the semi-cylinder 1503. After the restriction is lost, the entire board surface moves downward and is locked with the hole, and then the fixing work is carried out. After the board frame 1 is fixed, the fixing angle of the upper top cover 906 is adjusted according to the needs of highway use. When the noise on the road is large, push the control panel 8 backward. , rotate backward, the telescopic table 902 behind it will be raised, the upper pull rod 903 rises in height, and the upward movement will drive the top cover 906 to rotate downward along the top of the plate frame 1, forming an angle with the plate frame 1, which has a downward rebound effect on the noise generated by the road surface. If it is necessary to fine-tune the top cover 906, after the pull rod 903 is fixed in position, the top of the top cover 906 can be driven to rotate up and down by sliding the sliding plate 904 up and down, which has a better control effect on the board surface. When multiple board surfaces are connected to each other, multiple rotating rods 305 are rotated outward, and after opening, the connecting parts at the connection are sent into the inside of the expansion ring 307. The expansion ring 307 and the connecting head 309 fix the inside and outside of the connecting part joint, and the fixing effect is better. When the equipment is used for a long time and there is a lot of dust, the retractable rod 1101 is driven to slide up and down along the gap of the board surface. Since a cleaning roller is installed inside the fixed shell 1103, it rotates up and down along the board surface to collect dust inside the fixed shell 1103, and the cleaning effect is better.

[0045] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A highway sound barrier sound absorbing board, characterized in that: Specifically include: A plate frame (1), wherein a top groove (2) is provided at the top of the plate frame (1), the inner surface of the top groove (2) is slidably connected to a limiting mechanism (3), vertical grooves (4) are provided on both left and right sides of the outer surface of the plate frame (1), the inner surface of the vertical groove (4) is slidably connected to the limiting mechanism (3) via a circular groove, a sound insulation board (5) is fixedly connected to the inner surface of the plate frame (1), a fixing groove (6) is provided on the outer surface of the sound insulation board (5), the top of the fixing groove (6) is rotatably connected to a rotating shaft (7), the bottom of the rotating shaft (7) is fixedly connected to a control board (8), and the outer surface of the control board (8) is fixedly connected to an adjusting plate (9). The control panel (8) comprises a control panel (9), an outer surface of the adjustment mechanism (9) and an outer surface of the limit mechanism (3) are in contact with each other, the bottom of the control panel (8) is rotatably connected to a bottom shaft (10), the bottom of the bottom shaft (10) is fixedly connected to a cleaning mechanism (11), the outer surface of the sound insulation board (5) is evenly provided with through grooves (12), the inner surface of the through grooves (12) is provided with sound insulation grooves (13), the inner surface of the through grooves (12) and the outer surface of the cleaning mechanism (11) are slidably connected to each other, the bottom of the plate frame (1) is provided with an inclined groove (14), and the inner surface of the inclined groove (14) is slidably connected to a fixing mechanism (15); The limiting mechanism (3) comprises a connecting column (301), the outer surface of the connecting column (301) is slidably connected to the inner surface of the top groove (2), two connecting columns (301) are provided, and elastic sleeve rods (302) are fixedly connected to opposite sides of the two connecting columns (301); The adjustment mechanism (9) comprises a base (901), the outer surface of the base (901) is fixedly connected to the outer surface of the control panel (8), the outer surface of the base (901) is rotatably connected to a telescopic platform (902), the top of the telescopic platform (902) is rotatably connected to a pull rod (903), the top of the pull rod (903) is slidably connected to a sliding plate (904) via a sliding groove, the outer surface of the sliding plate (904) is rotatably connected to an arc rod (905), the outer surface of the arc rod (905) is rotatably connected to a top cover (906), the bottom of the top cover (906) is rotatably connected to the top of the pull rod (903), and the bottom of the top cover (906) is in contact with the top of the vertical plate (304).

2. A highway sound barrier sound absorbing board according to claim 1, characterized in that: A sliding rod (303) is slidably connected between opposite sides of the two elastic sleeve rods (302), a vertical plate (304) is fixedly connected to the top of the sliding rod (303), and a rotating rod (305) is rotatably connected to the outer surface of the sliding rod (303).

3. A highway sound barrier sound absorbing board according to claim 2, characterized in that: Four rotating rods (305) are provided, and arc-shaped grooves (306) are formed on the inner surfaces of the four rotating rods (305). An expansion ring (307) is clamped and connected to the inner surface of the arc-shaped groove (306).

4. A highway sound barrier sound absorbing board according to claim 3, characterized in that: The outer surface of the rotating rod (305) is rotatably connected to a positioning rod (308), and the outer surface of the sliding rod (303) is fixedly connected to a connecting head (309).

5. The highway sound barrier sound absorbing board according to claim 1, characterized in that: The fixing mechanism (15) comprises a side plate (1501), the outer surface of the side plate (1501) is slidably connected to the inner surface of the inclined groove (14), and the bottom of the side plate (1501) is slidably connected to a pulley (1502).

6. A highway sound barrier sound absorbing board according to claim 5, characterized in that: A slot (1507) is provided on the top of the side plate (1501), a semi-cylinder (1503) is fixedly connected to the inner surface of the slot (1507), and an annular ring (1504) is slidably connected to the outer surface of the semi-cylinder (1503).

7. A highway sound barrier sound absorbing board according to claim 6, characterized in that: A fixed disk (1505) is fixedly connected to the inner surface of the inclined groove (14), a dark groove (1506) is provided on the inner surface of the fixed disk (1505), and the inner surface of the dark groove (1506) is rotatably connected to the outer surface of the annular ring (1504).

8. The highway sound barrier sound absorbing board according to claim 1, characterized in that: The cleaning mechanism (11) comprises a retractable rod (1101), the outer surface of the retractable rod (1101) being fixedly connected to the bottom of the bottom shaft (10), the outer surface of the retractable rod (1101) being slidably connected to the inner surface of the through groove (12), and the outer surface of the retractable rod (1101) being fixedly connected to a slider (1102).

9. A highway sound barrier sound absorbing board according to claim 8, characterized in that: The outer surface of the slider (1102) is fixedly connected to a fixed casing (1103), a transverse groove is provided on the top of the fixed casing (1103), the inner surface of the fixed casing (1103) is rotatably connected to a cleaning roller (1104), and the outer surface of the cleaning roller (1104) is rotatably connected to a side rod (1105).

Citation Information

Patent Citations

  • Resistant semi -closed sound barrier of waiting ability reinforce

    CN208701526U