Sound absorption barrier for road noise reduction

Abstract

The sound absorption barrier for road noise reduction comprises a barrier body and a sound absorption component attached to the barrier body, the sound absorption component is of a box body structure and comprises an outer box part, an inner box part located in the outer box part and a cover body part covering the opening ends of the outer box part and the inner box part, a first sound absorption cavity is formed in the inner box part, and a second sound absorption cavity is formed in the outer box part. A gap is formed between the side wall of the outer box part and the side wall of the inner box part to form a second sound absorption cavity, the first sound absorption cavity is communicated with the second sound absorption cavity, and the first sound absorption cavity is communicated with the outside through a hole structure arranged on the cover body part. According to the noise reduction device, when noise is generated, the noise can enter the first sound absorption cavity from the hole structure arranged on the cover body part to carry out primary noise reduction, meanwhile, due to the fact that the second sound absorption cavity is communicated with the first sound absorption cavity, the noise which is not completely eliminated can enter the second sound absorption cavity to carry out secondary noise reduction, and therefore a very good noise reduction effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of road noise reduction, and in particular to a sound absorbing barrier for road noise reduction. Background Art

[0002] In order to insulate and reduce noise from roads, expressways, elevated composite roads and other noise sources, a common practice in the prior art is to set up sound barriers, which refer to wall structures set up on the sides of railways and roads to reduce the impact of driving noise on nearby residents.

[0003] In the prior art, the noise reduction function of the sound barriers used on both sides of the road is a very complex problem. This is because the noise emitted by the sound source has different frequencies, and the noise reduction effect of the sound barrier is also different. However, the existing sound barriers have a relatively single noise reduction function and the noise reduction effect is not good, and there is still a lot of room for improvement. Summary of the invention

[0004] In view of this, the present invention provides a sound-absorbing barrier for road noise reduction, which has the advantages of simple installation, easy use, and wide noise reduction function, and can well solve the technical problems existing in the above technical background.

[0005] The present invention discloses a sound-absorbing barrier for road noise reduction, comprising a barrier body and a sound-absorbing component attached to the barrier body, wherein the sound-absorbing component is a box structure, comprising an outer box portion, an inner box portion located inside the outer box portion, and a cover portion covering the open ends of the outer box portion and the inner box portion, a first sound-absorbing cavity is formed inside the inner box portion, a side periphery of the outer box portion and a side periphery of the inner box portion are provided with a gap to form a second sound-absorbing cavity, the first sound-absorbing cavity is connected to the second sound-absorbing cavity, and the first sound-absorbing cavity is connected to the outside through a hole structure provided on the cover portion.

[0006] In the present invention, when noise is generated, the noise will enter the first sound absorption cavity from the hole structure provided on the cover body to perform a primary noise reduction. At the same time, since the second sound absorption cavity is connected to the first sound absorption cavity, the noise that has not been completely eliminated will enter the second sound absorption cavity to perform a secondary noise reduction, thereby achieving a particularly good noise reduction effect. At the same time, in the present invention, since the second sound absorption cavity is formed by the gap between the side enclosure of the outer box portion and the side enclosure of the inner box portion, this not only enables the second sound absorption cavity to surround the first sound absorption cavity, so that there is a resonance effect between the second sound absorption cavity and the first sound absorption cavity, providing a better sound absorption effect, but also does not increase the thickness of the sound absorption component, so that the road noise reduction sound absorption barrier will not extend too much in the direction of the road, ensuring driving safety and having a better aesthetic appearance.

[0007] Furthermore, the first sound absorption cavity is divided into at least two sound absorption sub-cavities, each of which is independently connected to the outside by means of the hole structure on the cover body, and at least two sound absorption sub-cavities have different depths in the direction perpendicular to the barrier body. In the present invention, by means of the hole structure on the cover body, the cover body and the first sound absorption cavity form a sound absorption resonance structure, wherein since the first sound absorption cavity is divided into a plurality of sound absorption sub-cavities with different depths, noise reduction and sound absorption of noises with different frequency widths can be achieved simultaneously in the first sound absorption cavity, thereby expanding the scope of the noise reduction function of the sound barrier. That is to say, in the present invention, since different sound absorption sub-cavities have different depths, each sound absorption sub-cavity can reduce and absorb noises of different frequencies, thereby making the sound absorption component of the present invention functionally diverse.

[0008] Furthermore, in at least two phonon cavities, the deepest phonon cavities are connected to the other phonon cavities, and the other phonon cavities are not connected to each other. This enables the other phonon cavities, except the deepest phonon cavities, to form three noise reduction and sound absorption when they are working. First, the noise reduction and sound absorption resonance structure formed by the connection between each of the other phonon cavities and the cover body, then the noise reduction and sound absorption generated when the sound flows from each of the other phonon cavities to the deepest phonon cavities, and finally the noise reduction and sound absorption generated when the sound flows from the deepest phonon cavities to the second phonon cavities.

[0009] Furthermore, the deepest sound absorbing sub-cavity is connected to the corresponding remaining sound absorbing sub-cavities through the hole structure opened on the bottom of the remaining sound absorbing sub-cavities. With the help of the hole structure, a resonant sound absorbing structure can also be formed between the remaining sound absorbing sub-cavities and the deepest sound absorbing sub-cavity, thereby greatly improving the sound absorption effect.

[0010] Furthermore, among the at least two sound absorbing sub-cavities, the deepest sound absorbing sub-cavity is connected to the second sound absorbing cavity through a hole structure provided on the inner box portion, and the remaining sound absorbing sub-cavities are not connected to the second sound absorbing cavity.

[0011] In another embodiment, in at least two sound absorbing sub-cavities, each sound absorbing sub-cavity is connected to the second sound absorbing cavity through a hole structure provided on the inner box portion. In this embodiment, each sound absorbing sub-cavity is connected to the second sound absorbing cavity, so that each sound absorbing sub-cavity forms a resonant sound absorbing structure with the second sound absorbing cavity, but different from the previous embodiment, the deepest sound absorbing sub-cavity is not connected to the other sound absorbing sub-cavities.

[0012] In addition, the first sound absorption cavity is divided into three sound absorption sub-cavities, wherein the bottom of the first sound absorption sub-cavity and the bottom of the second sound absorption sub-cavity have a gap with the inner bottom wall of the inner box portion, the bottom of the third sound absorption sub-cavity is constituted by the inner bottom wall of the inner box portion, and the gap between the bottom of the first sound absorption sub-cavity and the bottom of the second sound absorption sub-cavity and the inner bottom wall of the inner box portion constitutes a part of the third sound absorption sub-cavity.

[0013] In another embodiment, the first phonon absorbing cavity and the second phonon absorbing cavity are connected to the second phonon absorbing cavity by means of a sound guide tube passing through the third phonon absorbing cavity, and a micro hole that can be connected to the third phonon absorbing cavity is provided on the sound guide tube. By means of the sound guide tube, the third phonon absorbing cavity forms a resonance cavity between the remaining phonon absorbing cavities and the second phonon absorbing cavity, thereby making the sound waves collide back and forth in the third phonon absorbing cavity, thereby further improving the noise reduction effect.

[0014] Beneficial effect: In the sound-absorbing barrier for road noise reduction of the present invention, when noise is generated, the noise will enter the first sound-absorbing cavity from the hole structure arranged on the cover body to perform primary noise reduction. At the same time, since the second sound-absorbing cavity is connected to the first sound-absorbing cavity, the noise that has not been completely eliminated will enter the second sound-absorbing cavity to perform secondary noise reduction, thereby achieving a particularly good noise reduction effect.

[0015] The road noise reduction sound-absorbing barrier of the present invention is disclosed in detail below with reference to the embodiments shown in the accompanying drawings and the accompanying drawing numbers. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The overall structural schematic diagram of the sound-absorbing barrier for road noise reduction in the present invention is shown.

[0017] Figure 2 The schematic diagram of the structure of the sound absorbing component in the present invention is shown.

[0018] Figure 3 A schematic diagram of the structure of an embodiment of the sound absorbing component of the present invention is shown. Figure 2 Center AA section view.

[0019] Figure 4 A schematic structural diagram of another embodiment of the sound absorbing component in the present invention is shown. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0022] Figure 1 The overall structural schematic diagram of the sound-absorbing barrier for road noise reduction in the present invention is shown. Figure 2 The schematic diagram of the structure of the sound absorbing component in the present invention is shown. Figure 3 A schematic diagram of the structure of an embodiment of the sound absorbing component of the present invention is shown. Figure 2 Center AA section view. Figure 4 A schematic structural diagram of another embodiment of the sound absorbing component in the present invention is shown.

[0023] Combination Figure 1 As shown, the present invention discloses a sound absorbing barrier for road noise reduction, comprising a barrier body 1 and a sound absorbing member 2 attached to the barrier body 1. Figure 2 and Figure 3 As shown, the sound absorbing member 2 is a box structure, which includes an outer box portion 3, an inner box portion 4 located inside the outer box portion 3, and a cover portion 5 covering the open ends of the outer box portion 3 and the inner box portion 4. A first sound absorbing cavity 6 is formed inside the inner box portion 4, and a gap is provided between the side periphery of the outer box portion 3 and the side periphery of the inner box portion 4 to form a second sound absorbing cavity 7. The first sound absorbing cavity 6 is connected to the second sound absorbing cavity 7, and the first sound absorbing cavity 6 is connected to the outside through a hole structure provided on the cover portion 5.

[0024] Among them, in the present invention, a plurality of sound absorbing strips composed of a plurality of sound absorbing components are arranged in parallel in the height direction of the barrier body, and each sound absorbing strip includes a plurality of sound absorbing components. Each sound absorbing component can be arranged to be made integrally with the barrier body, or can be arranged to be replaceable. In a preferred embodiment, a plug-in column is arranged on the outer box of the sound absorbing component, and a receiving hole is arranged on the barrier body. The sound absorbing component can be installed on the barrier body in a manner that the plug-in column is inserted into the receiving hole. When one of the sound absorbing components is damaged, it can be replaced separately without replacing a certain section of the sound barrier as a whole.

[0025] When noise is generated, the noise will enter the first sound absorption cavity 6 from the hole structure set on the cover body 5, and perform a primary noise reduction. At the same time, since the second sound absorption cavity 7 is connected to the first sound absorption cavity 6, the noise that has not been completely eliminated will enter the second sound absorption cavity 7 for secondary noise reduction, thereby achieving a particularly good noise reduction effect. At the same time, in the present invention, since the second sound absorption cavity 7 is formed by the gap between the side of the outer box 3 and the side of the inner box 4, this not only enables the second sound absorption cavity 7 to surround the first sound absorption cavity 6, so that there is a resonance effect between the second sound absorption cavity 7 and the first sound absorption cavity 6, providing a better sound absorption effect, but also does not increase the thickness of the sound absorption component 2, so that the road noise reduction sound absorption barrier will not extend too much in the direction of the road, ensuring driving safety and having a good aesthetic appearance.

[0026] like Figure 3 As shown, the first sound absorption cavity 6 is divided into at least two sound absorption sub-cavities, each of which is independently connected to the outside by means of the hole structure on the cover body 5, and at least two sound absorption sub-cavities have different depths in the direction perpendicular to the barrier body 1. In the present invention, by means of the hole structure on the cover body 5, the cover body 5 and the first sound absorption cavity 6 form a sound absorption resonance structure, wherein since the first sound absorption cavity 6 is divided into a plurality of sound absorption sub-cavities with different depths, the first sound absorption cavity 6 can simultaneously achieve noise reduction and sound absorption of noises with different frequency widths, thereby expanding the scope of the noise reduction function of the sound barrier. That is to say, in the present invention, since different sound absorption sub-cavities have different depths, each sound absorption sub-cavity can reduce and absorb noises of different frequencies, thereby making the sound absorption component 2 of the present invention functionally diverse.

[0027] Further integration Figure 3 As shown, in at least two phonon cavities, the deepest phonon cavities are connected to the other phonon cavities, and the other phonon cavities are not connected to each other. This enables the other phonon cavities except the deepest phonon cavities to form three noise reduction and sound absorption when they are working. First, the noise reduction and sound absorption resonance structure formed by the connection between each of the other phonon cavities and the cover body 5, then the noise reduction and sound absorption generated when each of the other phonon cavities flows into the deepest phonon cavities, and finally the noise reduction and sound absorption generated when the deepest phonon cavities flow into the second phonon cavities 7.

[0028] In addition, in the aforementioned embodiment, the deepest sound absorbing sub-cavity is connected to the corresponding remaining sound absorbing sub-cavities through the hole structure opened on the bottom of the remaining sound absorbing sub-cavities. With the help of the hole structure, a resonant sound absorbing structure can also be formed between the remaining sound absorbing sub-cavities and the deepest sound absorbing sub-cavity, thereby greatly improving the sound absorption effect.

[0029] In addition, in the aforementioned embodiment, among the at least two sound absorbing sub-cavities, the deepest sound absorbing sub-cavity is connected to the second sound absorbing cavity 7 through the hole structure provided on the inner box portion 4 , and the remaining sound absorbing sub-cavities are not connected to the second sound absorbing cavity 7 .

[0030] like Figure 4 As shown, in another embodiment, in at least two sound absorbing sub-cavities, each sound absorbing sub-cavity is connected to the second sound absorbing cavity 7 through a hole structure provided on the inner box portion 4. In this embodiment, each sound absorbing sub-cavity is connected to the second sound absorbing cavity 7, so that each sound absorbing sub-cavity forms a resonant sound absorbing structure with the second sound absorbing cavity 7, but different from the previous embodiment, the deepest sound absorbing sub-cavity is not connected to the other sound absorbing sub-cavities.

[0031] In addition, combined Figure 3 and Figure 4 As shown, the first sound absorption cavity 6 is divided into three phonon absorption sub-cavities, specifically, including a first phonon absorption sub-cavity 8, a second phonon absorption sub-cavity 9 and a third phonon absorption sub-cavity 10, wherein the depth of the third phonon absorption sub-cavity is greater than the depth of the second phonon absorption sub-cavity, and the depth of the second phonon absorption sub-cavity is greater than the depth of the first phonon absorption sub-cavity, wherein the bottom of the first phonon absorption sub-cavity 8 and the bottom of the second phonon absorption sub-cavity 9 have a gap with the inner bottom wall of the inner box portion 4, the bottom of the third phonon absorption sub-cavity is constituted by the inner bottom wall of the inner box portion 4, and the gap between the bottom of the first phonon absorption sub-cavity 8 and the bottom of the second phonon absorption sub-cavity 9 and the inner bottom wall of the inner box portion 4 constitutes a part of the third phonon absorption sub-cavity 10.

[0032] In another embodiment (not shown in the figure), the first phonon absorbing sub-cavity 8 and the second phonon absorbing sub-cavity 9 are connected to the second phonon absorbing sub-cavity 7 by means of a sound guide tube passing through the third phonon absorbing sub-cavity 10, and a micro-hole that can be connected to the third phonon absorbing sub-cavity 10 is opened on the sound guide tube. By means of the sound guide tube, the third phonon absorbing sub-cavity 10 forms a resonance cavity between the remaining phonon absorbing sub-cavities and the second phonon absorbing cavity 7, so that the sound waves collide back and forth in the third phonon absorbing cavity, thereby further improving the noise reduction effect. For the convenience of description, spatial relative terms such as "above", "above", "on the upper surface", "above", etc. can be used here to describe the spatial position relationship between a device or feature as shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations of the device in use or operation other than the orientation described in the figure. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can encompass both an orientation of "above" and "below." The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A sound-absorbing barrier for road noise reduction, characterized in that: The invention comprises a barrier body and a sound absorbing member attached to the barrier body, wherein the sound absorbing member is a box structure, comprising an outer box portion, an inner box portion located inside the outer box portion, and a cover portion covering the open ends of the outer box portion and the inner box portion, wherein a first sound absorbing cavity is formed inside the inner box portion, a gap is provided between the side periphery of the outer box portion and the side periphery of the inner box portion, forming a second sound absorbing cavity, the first sound absorbing cavity is connected to the second sound absorbing cavity, and the first sound absorbing cavity is connected to the outside through a hole structure provided on the cover portion.

2. The road noise reduction sound absorbing barrier according to claim 1, characterized in that: The first sound absorption cavity is divided into at least two sound absorption sub-cavities, each of which is independently communicated with the outside by means of a hole structure on the cover body, and the at least two sound absorption sub-cavities have different depths in a direction perpendicular to the barrier body.

3. The road noise reduction sound absorbing barrier according to claim 2, characterized in that: Among the at least two phonon absorption cavities, the phonon absorption cavity with the deepest depth is connected to the remaining phonon absorption cavities respectively, and the remaining phonon absorption cavities are not connected to each other.

4. The method according to claim 3, characterized in that: The deepest phonon absorbing cavity is connected to the corresponding remaining phonon absorbing cavities through hole structures opened on the bottoms of the remaining phonon absorbing cavities.

5. The road noise reduction sound absorbing barrier according to claim 4, characterized in that: Among the at least two sound absorbing sub-cavities, the deepest sound absorbing sub-cavity is connected to the second sound absorbing cavity through a hole structure provided on the inner box portion, and the remaining sound absorbing sub-cavities are not connected to the second sound absorbing cavity.

6. The road noise reduction sound absorbing barrier according to claim 2, characterized in that: In the at least two sound absorbing sub-cavities, each sound absorbing sub-cavity is communicated with the second sound absorbing cavity through a hole structure provided on the inner box portion.

7. The road noise reduction sound absorbing barrier according to claim 2, characterized in that: The first sound absorbing cavity is divided into three sound absorbing sub-cavities, wherein the bottom of the first sound absorbing sub-cavity and the bottom of the second sound absorbing sub-cavity have a gap with the inner bottom wall of the inner box portion, the bottom of the third sound absorbing sub-cavity is formed by the inner bottom wall of the inner box portion, and the gap between the bottom of the first sound absorbing sub-cavity and the bottom of the second sound absorbing sub-cavity and the inner bottom wall of the inner box portion constitutes a part of the third sound absorbing sub-cavity.

8. The road noise reduction sound absorbing barrier according to claim 7, characterized in that: The first sound absorbing sub-cavity and the second sound absorbing sub-cavity are connected to the second sound absorbing cavity by means of a sound guide pipe passing through the third sound absorbing sub-cavity.

9. The road noise reduction sound absorbing barrier according to claim 8, characterized in that: The sound-conducting tube is provided with a microhole which can communicate with the third sound-absorbing sub-cavity.

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