An interference type sound absorbing barrier

Abstract

The utility model discloses an interference type sound absorption barrier, including screen body, be equipped with along the screen body and project sound absorption unit to the sound source side outward, and the number of sound absorption unit is a plurality, and sound absorption unit with screen body is integrally formed, because sound absorption unit and screen body are integral structure, and sound absorption unit projects to screen body, so that makes the uneven gap between sound absorption unit and screen body, when the sound wave enters the gap, the sound wave is interfered, scatters, makes the sound wave back and forth reflection between screen body and sound absorption unit, to reduce the overall energy of sound wave, and then reach the effect of sound reduction and noise reduction, sound absorption unit includes the extension and recessed part, between any two adjacent sound absorption units, at least one extension enters the recessed part of another sound absorption unit, therefore makes the gap between each sound absorption unit more dense, promotes the interference and scattering ability to sound wave, and then promotes the noise reduction effect of the equipment.

Description

Technical Field

[0001] This utility model relates to the field of sound absorption equipment technology, specifically to an interference-type sound absorption barrier. Background Technology

[0002] Sound barriers are currently the most widely used noise reduction measure in traffic noise control. They achieve noise reduction by shielding and blocking the propagation path of traffic noise. Therefore, the sound absorption performance of the barrier material and the duration of maintaining this performance directly affect the overall noise reduction effect and durability of the sound barrier. However, most sound barrier panels used in China are made of metal, which presents the following problems: The sound-absorbing panels rely mainly on the sound absorption performance of the porous material filling them to absorb and buffer noise. However, this cannot solve the durability problem of overly loose porous material structures; that is, the better the sound absorption effect of the porous material structure, the less durable it is. At the same time, the filling sound-absorbing material structure is fragile and must be fixed with an external metal frame. Due to the insufficient porosity of the external metal material (up to 35%), the noise absorption effect is reduced, which affects the secondary absorption of reflected sound, leading to a decrease in sound absorption performance. Utility Model Content

[0003] The purpose of this invention is to provide an interference-type sound-absorbing barrier to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an interference-type sound-absorbing barrier, comprising a screen body, wherein the screen body is provided with sound-absorbing units protruding outward from the sound source side along the screen body, and the number of sound-absorbing units is multiple, and the sound-absorbing units are integrally formed with the screen body; the sound-absorbing unit includes a protruding part and a recessed part; between any two adjacent sound-absorbing units, at least one protruding part enters into the recessed part of another sound-absorbing unit.

[0005] As a preferred technical solution of this utility model: the number of the protrusions is multiple, and each of the protrusions is arranged in a circular array with the center of the circle as the center point of the array.

[0006] As a preferred technical solution of this utility model: the protrusion is arc-shaped, and the three protrusions are arranged in a circle along the center circumference, causing the sound-absorbing unit to be fan-shaped.

[0007] As a preferred technical solution of this utility model: the outer end face of the protrusion has an arc surface.

[0008] As a preferred technical solution of this utility model: the screen body is further provided with a grid hole, and the grid hole completely penetrates the screen body along the length direction of the screen body.

[0009] As a preferred technical solution of this utility model, it also includes a protective cover, which covers the screen body from all sides.

[0010] As a preferred technical solution of this utility model: the screen body and the sound-absorbing unit are integrally formed by cement casting, and the distance between the outer wall surface of the sound-absorbing unit and the outer wall surface of the screen body is 2 cm.

[0011] As a preferred technical solution of this utility model: the sound-absorbing unit has a horizontal length of 10 cm and a vertical length of 8.3 cm.

[0012] The beneficial effects of this utility model by adopting the above technical solution are as follows: Since the sound-absorbing unit and the screen are an integral structure, the cooperation between the sound-absorbing unit and the screen allows traffic noise to be alternately reflected on the surface of the screen and the surface of the sound-absorbing unit, and scattered in the gap between the screen and the sound-absorbing unit. The sound waves reflect back and forth between the screen and the sound-absorbing unit to reduce the overall energy of the sound waves, thereby achieving the effect of noise reduction. In particular, it is not necessary to directly open holes in the screen when achieving the effect of noise reduction, thus solving the problems of poor sound absorption effect caused by insufficient openings in the screen of existing sound-absorbing equipment and the reduction of sound absorption performance of sound-absorbing materials after long-term use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a side view of the main structure of the present invention; Figure 3 This is a schematic diagram of the main structure of the sound-absorbing unit of this utility model.

[0014] In the diagram: 1. Screen body; 2. Sound-absorbing unit; 20. Protrusion; 21. Recess; 22. Center; 23. Arc surface; 3. Protective cover; 4. Mesh holes. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "upper surface," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model.

[0016] Please see Figure 1-3 This utility model provides an embodiment of an interference-type sound-absorbing barrier, comprising a screen body 1, on which sound-absorbing units 2 protrude outwards towards the sound source side along the screen body 1, and the number of sound-absorbing units 2 is multiple, and the sound-absorbing units 2 and the screen body 1 are integrally formed; since the sound-absorbing units 2 and the screen body 1 are integrally formed, and the sound-absorbing units 2 protrude from the screen body 1, there is an uneven gap between the sound-absorbing units 2 and the screen body 1. When a sound wave enters the gap, the sound wave is interfered with and scattered by the gap, causing the sound wave to reflect back and forth between the screen body 1 and the sound-absorbing units 2, thereby reducing the overall energy of the sound wave and achieving the effect of sound reduction and noise reduction; therefore, compared with the prior art, it is not necessary to open holes in the screen body or fill the screen body with sound-absorbing material.

[0017] The sound-absorbing unit 2 includes a protrusion 20 and a recess 21; between any two adjacent sound-absorbing units 2, at least one protrusion 20 enters into the recess 21 of another sound-absorbing unit 2, thus making the gaps between each sound-absorbing unit 2 relatively dense, improving the interference and scattering ability of sound waves, and thereby improving the noise reduction effect of the device.

[0018] By utilizing the uneven surface formed between the sound-absorbing unit 2 and the screen body 1, the overall energy of traffic noise is reduced through multiple interference effects of alternating reflection and scattering, thereby achieving noise attenuation and shielding. In particular, since the sound-absorbing unit 2 is directly molded onto the screen body 1, it effectively solves the problem of short equipment lifespan and high material costs associated with existing screens that require the use of sound-absorbing materials. Furthermore, in addition to its sound insulation and noise reduction advantages, the uniform distribution of the sound-absorbing units 2 on the screen body 1 also makes it more aesthetically pleasing overall.

[0019] To improve the aesthetics of the device, the sound-absorbing unit 2 is structurally optimized. Specifically, the number of protrusions 20 is multiple, and each protrusion 20 is arranged in a circular array with the center 22 as the center point. Furthermore, the protrusions 20 are arc-shaped, and when three protrusions 20 are arranged in a circular array along the center 22, the sound-absorbing unit 2 becomes fan-shaped. Even further, the outer end face of each protrusion 20 has an arc surface 23.

[0020] In summary, by optimizing the structure of the sound-absorbing unit 2, firstly, each sound-absorbing unit 2 can have better sound absorption capabilities; secondly, the sound-absorbing unit 2 can also enhance the aesthetics of the entire screen 1. Therefore, when the screen 1 is applied to places where environmental noise reduction is required, such as highways, urban roads, building rooftop platforms, and temporary construction sites, this device can also beautify these places.

[0021] To address the numerous problems associated with metal sound-absorbing panels, improvements were made to the material of panel 1. Specifically, panel 1 and the sound-absorbing unit 2 are integrally molded using cement casting. Due to the high density of cement, sound wave propagation is effectively suppressed. Therefore, panel 1 made of cement not only improves noise reduction but also offers advantages such as low cost, low energy consumption, and low carbon emissions. In particular, the cement material of panel 1 allows the sound-absorbing unit 2 and panel 1 to be cast in a single piece within a mold, further reducing equipment production costs.

[0022] Because the screen body 1 is also provided with mesh holes 4, and the mesh holes 4 are provided along the length of the screen body 1 and completely penetrate the screen body 1, the overall weight of the entire device can be reduced, which facilitates the installation and transportation of the device. In addition, the mesh holes 4 also facilitate airflow, which can quickly dissipate the heat generated inside the screen body 1, thereby reducing the problem of the screen body 1 heating up due to the absorption of sound wave energy.

[0023] Furthermore, the protective cover 3 covers the perimeter of the screen body 1, thus protecting the perimeter of the screen body 1. In particular, when the screen body 1 is made of cement, the protective cover 3 can protect the perimeter of the screen body 1 to prevent the screen body 1 from being damaged by impact during use and transportation. The protective cover 3 can be a stainless steel angle iron arranged along the edge of the screen body 1.

[0024] Compared to metal plates, the screen 1 has the following advantages, specifically taking the following parameters as examples: the screen 1 has dimensions of 196×50×10 cm, the distance between the outer wall of the sound-absorbing unit 2 and the outer wall of the screen 1 is 2 cm, and the size of the mesh hole 4 is 6×6 cm; the length direction of the screen 1 is taken as the horizontal direction, and the width direction of the screen 1 is taken as the vertical direction; the length of the sound-absorbing unit 2 in the horizontal direction is 10 cm, and the length of the sound-absorbing unit 2 in the vertical direction is 8.3 cm.

[0025] The experimental data shows that the average sound absorption coefficient is 0.7, the weighted sound insulation is over 35dB, which is more than 20% higher than that of ordinary non-metallic sound-absorbing panels, increasing from 0.5 to 0.6; the sound insulation is significantly increased, increasing by 20% compared to ordinary non-metallic sound-absorbing panels, from 30dB to 36dB; the cost is low, reducing the cost by 30% compared to metal sound-absorbing panels; the use of non-metallic inorganic materials results in low energy consumption and low carbon emissions, reducing carbon emissions by 70% or more compared to metal sound-absorbing panels. Therefore, using cement-based screens can solve the current problems of corrosion resistance of metal sound-absorbing panels, the lack of durability of the sound absorption performance of porous materials filling the panels, the insufficient porosity of metal materials reducing noise absorption performance, and the high energy consumption of metal materials.

[0026] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. An interference-type sound-absorbing barrier, characterized in that: Includes a screen body (1), on which a sound-absorbing unit (2) protrudes outward from the sound source side along the screen body (1), and the number of the sound-absorbing unit (2) is multiple, and the sound-absorbing unit (2) and the screen body (1) are integrally formed; The sound-absorbing unit (2) includes a protrusion (20) and a recess (21); between any two adjacent sound-absorbing units (2), at least one protrusion (20) enters into the recess (21) of another sound-absorbing unit (2).

2. The interference-type sound-absorbing barrier according to claim 1, characterized in that: The number of the protrusions (20) is multiple, and each of the protrusions (20) is arranged in a circular array with the center (22) as the center point of the array.

3. The interference-type sound-absorbing barrier according to claim 2, characterized in that: The protrusion (20) is arc-shaped, and the three protrusions (20) are arranged in a circular array along the center (22), causing the sound-absorbing unit (2) to be fan-shaped.

4. The interference-type sound-absorbing barrier according to claim 3, characterized in that: The outer end face of the protrusion (20) has an arc surface (23).

5. An interference-type sound-absorbing barrier according to any one of claims 1-4, characterized in that: The screen body (1) is also provided with a grid hole (4), and the grid hole (4) completely penetrates the screen body (1) along the length direction of the screen body (1).

6. The interference-type sound-absorbing barrier according to claim 5, characterized in that: It also includes a protective cover (3), which covers the screen body (1) from all sides.

7. The interference-type sound-absorbing barrier according to claim 6, characterized in that: The screen (1) and the sound-absorbing unit (2) are integrally formed by cement casting, and the distance between the outer wall of the sound-absorbing unit (2) and the outer wall of the screen (1) is 2 cm.

8. The interference-type sound-absorbing barrier according to claim 7, characterized in that: The sound-absorbing unit (2) has a horizontal length of 10 cm and a vertical length of 8.3 cm.

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