A road noise barrier based on sound absorbing material

Abstract

The utility model provides a kind of road noise barrier based on sound-absorbing material, including barrier support assembly and barrier body, barrier support assembly includes the barrier support post of pair arrangement, and the sliding slot upper end of barrier support post is connected with buffer sliding block, and one barrier hanging pole is connected between buffer sliding block, barrier hanging pole is connected with barrier assembly support by hinged link, and barrier assembly support is connected with barrier body by bolt.The utility model in barrier body is converted into heat energy dissipation by the sound hole hole of sound hole board body, and the sound-absorbing micropore on microporous attraction cloth layer is based on micro-perforated plate theory, and the sound-absorbing coefficient is excellent in full frequency band, especially in low frequency part, further improve sound-absorbing effect, significantly improve the sound-absorbing performance of low frequency band by sound-absorbing cotton layer, and the porous structure of sound-absorbing cotton layer effectively insulates internal air convection and heat radiation, significantly reduce heat loss, while large aperture area absorbs and reflects sound wave, effectively reduce noise.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction and environmental protection technology, and in particular to a road noise barrier based on sound-absorbing materials. Background Technology

[0002] In recent years, with the acceleration of urbanization and the increase in the number of vehicles, noise levels on urban roads have continued to rise, causing many inconveniences to citizens' lives, especially during peak commuting hours, where noise pollution seriously affects residents' physical and mental health. Traditional road noise barriers mostly use plastic or glass panels to isolate noise, which have low efficiency in reflecting and penetrating sound waves, and thus have limited control over urban noise. Utility Model Content

[0003] To address the aforementioned problems, this invention proposes a road noise barrier based on sound-absorbing materials, which can more accurately solve the problems described above.

[0004] This utility model is achieved through the following technical solution:

[0005] This utility model proposes a road noise barrier based on sound-absorbing materials, including a barrier support assembly and a barrier body. The barrier support assembly includes a pair of barrier pillars, each with a groove at its upper and lower ends. A buffer slider is slidably connected to the groove. A barrier hanging rod is connected between the corresponding buffer sliders of each pair of barrier pillars. Two barrier hanging rods are connected to a barrier assembly bracket via a hinge rod. Several barrier assembly brackets are arranged at equal intervals laterally, and the barrier body is bolted to the barrier assembly brackets. The barrier body includes a sound-perforated plate. A layer of microporous absorbent fabric is laminated to the front surface of the sound-perforated plate. The upper and lower ends of the sound-perforated plate are bent into snap-fit ​​parts that fold backward, and a sound-absorbing cotton layer is snapped between the snap-fit ​​parts. The sound-absorbing cotton layer is set tightly against the sound-perforated plate.

[0006] Furthermore, the upper and lower ends of the buffer slider are both connected to buffer springs, and the buffer spring connected to the top of the buffer slider is connected to the top of the slide groove, while the buffer spring connected to the bottom of the buffer slider is connected to the bottom of the slide groove.

[0007] Furthermore, the sound hole plate has a matrix of sound holes arranged in a matrix, with a hole diameter of 2-4 mm and a hole spacing of 10-25 mm.

[0008] Furthermore, the microporous absorbent fabric layer is provided with sound-absorbing micropores, the pore size of which is 0.25-0.5mm and the open area ratio of which is greater than 25%.

[0009] Furthermore, the sound-absorbing cotton layer has internal air holes with a diameter of 1-2 mm and a volume ratio of more than 35%.

[0010] The beneficial effects of this utility model are:

[0011] 1. In this utility model, the barrier body dissipates sound energy by converting it into heat energy through the sound holes opened on the sound hole plate. The sound-absorbing micropores on the microporous absorption cloth layer are based on the micro-perforated plate theory and have excellent sound absorption coefficients across the entire frequency range. Especially in the low-frequency range, the sound absorption effect is further improved. The sound-absorbing cotton layer significantly improves the sound absorption performance in the low-frequency range, and the porous structure of the sound-absorbing cotton layer effectively isolates internal air convection and heat radiation, significantly reducing heat loss. At the same time, the large pore area absorbs and reflects sound waves, effectively reducing noise.

[0012] 2. When the barrier body is subjected to the vibration impact of sound waves, the sound wave vibration received by the barrier body is transmitted to the barrier hanging rod through the hinge rod, the barrier hanging rod pushes the buffer slider, and finally the buffer spring buffers and absorbs part of the noise generated by the vibration. Attached Figure Description

[0013] Figure 1 This is a first three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention;

[0015] Figure 3 This is a three-dimensional structural diagram of the barrier body in this utility model;

[0016] Figure 4 This is a side sectional view of the structure of this utility model.

[0017] In the diagram: 1. Barrier support assembly; 101. Barrier support column; 1011. Slide groove; 102. Buffer slider; 1021. Buffer spring; 103. Barrier hanging rod; 104. Hinge rod; 105. Barrier assembly bracket; 2. Barrier body; 201. Sound hole plate; 2011. Sound hole; 2012. Fastening plate; 202. Microporous absorption cloth layer; 2021. Sound-absorbing micropores; 203. Sound-absorbing cotton layer. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1

[0020] A road noise barrier based on sound-absorbing material includes a barrier support component 1 and a barrier body 2. The barrier body 2 includes a sound hole plate 201, on which sound holes 2011 are arranged in a matrix. The diameter of the sound holes 2011 is 2-4 mm and the spacing between the holes is 10-25 mm, so that the barrier body 2 forms a sound hole plate, based on the Helmholtz resonator principle. When sound waves hit the sound hole plate 201, some of the sound energy enters the air cavity behind it through the sound holes 2011. During this process, the air molecules vibrate and rub against the inner wall of the cavity, converting the sound energy into heat energy and dissipating it.

[0021] A microporous sound-absorbing fabric layer 202 is laminated to the front surface of the sound-perforated plate 201. The microporous sound-absorbing fabric layer 202 has sound-absorbing micropores 2021 with a pore size of 0.25-0.5 mm and an open area ratio greater than 25%. Based on the micro-perforated plate theory, the microporous sound-absorbing fabric layer 202 exhibits excellent sound absorption coefficients across the entire frequency range, especially in the low-frequency range, further enhancing the sound absorption effect.

[0022] The upper and lower ends of the sound hole panel 201 are both bent to form a snap-fit ​​plate portion 2012 that folds backward, and a sound-absorbing cotton layer 203 is snapped between the snap-fit ​​plate portions 2012. The sound-absorbing cotton layer 203 is set tightly against the sound hole panel 201, which can significantly improve the sound absorption performance in the low frequency range. The sound-absorbing cotton layer 203 has a central air hole with a diameter of 1-2mm and a volume ratio of more than 35%. The porous structure of the sound-absorbing cotton layer 203 effectively isolates internal air convection and heat radiation, significantly reducing heat loss. At the same time, the large pore area absorbs and reflects sound waves, effectively reducing noise.

[0023] The technical solutions in the above embodiments of this application have at least the following technical effects or advantages: In this utility model, the barrier body 2 dissipates sound energy by converting it into heat energy through the sound holes 2011 opened on the sound hole plate 201. The sound-absorbing microholes 2021 on the microporous absorption cloth layer 202 have excellent sound absorption coefficients across the entire frequency band, especially in the low-frequency part, which further improves the sound absorption effect. The sound-absorbing cotton layer 203 significantly improves the sound absorption performance in the low-frequency band, and the porous structure of the sound-absorbing cotton layer 203 effectively isolates internal air convection and heat radiation, significantly reducing heat loss. At the same time, the large pore area absorbs and reflects sound waves, effectively reducing noise.

[0024] Example 2

[0025] The barrier support assembly 1 includes a pair of barrier pillars 101. Each barrier pillar 101 has a groove 1011 at its upper and lower ends. A buffer slider 102 is slidably connected to the groove 1011. A barrier hanging rod 103 is connected between the corresponding buffer sliders 102 of each pair of barrier pillars 101. The two barrier hanging rods 103 are connected to a barrier assembly bracket 105 through a hinge rod 104. Several barrier assembly brackets 105 are arranged at equal intervals in the horizontal direction. The barrier body 2 is connected to the barrier assembly bracket 105 by bolts. A buffer spring 1021 is connected to the upper and lower ends of the buffer slider 102. The buffer spring 1021 connected to the top of the buffer slider 102 is connected to the top of the groove 1011, and the buffer spring 1021 connected to the bottom of the buffer slider 102 is connected to the bottom of the groove 1011.

[0026] The technical solutions in the above embodiments of this application have at least the following technical effects or advantages: When the barrier body 2 is subjected to the vibration impact of sound waves, the present invention transmits the sound wave vibration received by the barrier body 2 to the barrier hanging rod 103 through the hinge rod 104, pushes the buffer slider 102 through the barrier hanging rod 103, and finally buffers it with the buffer spring 1021, absorbing part of the noise generated by the vibration.

[0027] Of course, there may be other implementations of this utility model. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of this utility model.

Claims

1. A road noise barrier based on sound-absorbing material, comprising a barrier support assembly (1) and a barrier body (2), characterized in that, The barrier support assembly (1) includes a pair of barrier pillars (101). Each barrier pillar (101) has a groove (1011) at both its upper and lower ends. A buffer slider (102) is slidably connected to the groove (1011). A barrier hanging rod (103) is connected between the corresponding buffer sliders (102) of each pair of barrier pillars (101). The two barrier hanging rods (103) are connected to a barrier assembly bracket (105) through a hinge rod (104). The barrier assembly bracket (105) is arranged horizontally at equal intervals. There are several pieces of cloth, and the barrier mounting bracket (105) is connected to the barrier body (2) by bolts. The barrier body (2) includes a sound hole plate (201). A microporous absorption cloth layer (202) is laminated on the front surface of the sound hole plate (201). The upper and lower ends of the sound hole plate (201) are bent into a snap-fit ​​plate part (2012) that is folded back. A sound-absorbing cotton layer (203) is snapped between the snap-fit ​​plate parts (2012). The sound-absorbing cotton layer (203) is set close to the sound hole plate (201).

2. A road noise barrier based on sound-absorbing materials according to claim 1, characterized in that, The upper and lower ends of the buffer slider (102) are connected to buffer springs (1021), and the buffer spring (1021) connected to the top of the buffer slider (102) is connected to the top of the slide groove (1011), and the buffer spring (1021) connected to the bottom of the buffer slider (102) is connected to the bottom of the slide groove (1011).

3. A road noise barrier based on sound-absorbing materials according to claim 1, characterized in that, The sound hole plate (201) has a matrix of sound holes (2011) arranged in a matrix. The diameter of the sound holes (2011) is 2-4 mm and the spacing between the holes is 10-25 mm.

4. A road noise barrier based on sound-absorbing material according to claim 1, characterized in that, The microporous absorption fabric layer (202) is provided with sound-absorbing micropores (2021), the pore size of the sound-absorbing micropores (2021) is 0.25-0.5mm, and the opening rate of the sound-absorbing micropores (2021) is greater than 25%.

5. A road noise barrier based on sound-absorbing material according to claim 1, characterized in that, The sound-absorbing cotton layer (203) has internal air holes with a diameter of 1-2 mm and a volume ratio of more than 35%.

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