Broadband composite sound insulation structure

Abstract

This invention discloses a broadband composite sound insulation structure, including a first sound insulation mechanism and a second sound insulation mechanism. The first and second sound insulation mechanisms are disposed opposite to each other, with a closed air layer formed between them. Through the arrangement of the first, second, and air layers, the broadband composite sound insulation structure of this invention can effectively reduce and suppress broadband noise, including high-frequency, mid-frequency, and low-frequency noise. By incorporating the first and second sound insulation panels, noise reduction can be achieved while minimizing external environmental pollution to both the first and second sound insulation layers.

Description

Technical Field

[0001] This invention relates to noise control, and more specifically, to a broadband composite sound insulation structure. Background Technology

[0002] Currently, sound insulation is a commonly used noise reduction method to effectively solve noise pollution problems and improve the quality of the acoustic environment. The commonly used sound insulation structure is a traditional structure of sound-absorbing cotton and sound-insulating panels. The sound-insulating panels are often made of thin steel plates, and the sound-absorbing cotton is usually made of glass wool or rock wool. This traditional sound insulation structure has a very good noise reduction effect on mid- and high-frequency noise, but its suppression effect is poor at lower noise frequencies. Low-frequency noise, due to its long wavelength and slow attenuation during transmission, has always been a difficult problem to solve in noise control.

[0003] Furthermore, the facing material of traditional sound-absorbing cotton in sound insulation structures is generally perforated board, making the sound-absorbing cotton susceptible to external environmental influences. Industrial environments are typically harsh, and when sound-absorbing cotton is exposed to such conditions, prolonged corrosion, dust accumulation, and oxidation gradually reduce its performance, thus affecting the overall performance of traditional sound insulation structures and significantly decreasing noise reduction effectiveness.

[0004] In view of the above problems, the present invention provides a broadband composite sound insulation structure. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a broadband composite sound insulation structure that can effectively reduce and suppress broadband noise such as high frequency, mid frequency and low frequency noise in a relatively general way.

[0006] To solve the above-mentioned technical problems, the present invention provides a broadband composite sound insulation structure, including a first sound insulation mechanism and a second sound insulation mechanism, wherein the first sound insulation mechanism and the second sound insulation mechanism are disposed opposite to each other and a closed air layer is formed between them.

[0007] Furthermore, the first sound insulation mechanism includes a pair of first sound insulation panels and a pair of first sound insulation mechanism frames arranged opposite to each other, wherein the first sound insulation panels are connected to the first sound insulation mechanism frames to form a first sound insulation layer.

[0008] Preferably, a honeycomb-shaped cavity is formed within the first sound insulation layer, and the honeycomb-shaped cavity is filled with damping particles.

[0009] Preferably, the honeycomb cavity is formed by an aluminum alloy plate, and the damping particles are aluminum particles.

[0010] Furthermore, the second sound insulation mechanism includes a second sound insulation plate and a perforated plate arranged opposite to each other, and a pair of second sound insulation mechanism frames arranged opposite to each other. The second sound insulation mechanism frames are connected to the second sound insulation plate and the perforated plate to form a second sound insulation layer.

[0011] Furthermore, the second sound insulation layer is filled with glass wool board or rock wool board, and the surface of the glass wool board or rock wool board is wrapped with alkali-free water-repellent glass fiber cloth.

[0012] Furthermore, the first sound insulation mechanism frame is provided with a first sound insulation mechanism connecting plate, the second sound insulation mechanism frame is provided with a second sound insulation mechanism connecting plate, and a pair of oppositely arranged brackets are fixed between the first sound insulation mechanism connecting plate and the second sound insulation mechanism connecting plate. The perforated plate, the first sound insulation plate and the brackets form the air layer.

[0013] Preferably, the bracket is fixed between the first sound insulation mechanism connecting plate and the second sound insulation mechanism connecting plate by fasteners.

[0014] Preferably, a sealing strip is installed between the bracket and the first sound insulation mechanism connecting plate, and between the bracket and the second sound insulation mechanism connecting plate.

[0015] Preferably, the first sound insulation board is an aluminum alloy plate, the second sound insulation board is a galvanized steel plate, the perforated plate is an aluminum alloy perforated plate, and the first sound insulation mechanism frame, the second sound insulation mechanism frame, the first sound insulation mechanism connecting plate, and the second sound insulation mechanism connecting plate are all steel plates.

[0016] The beneficial effects of the present invention through the above technical solution are as follows:

[0017] I. This invention can overcome the shortcomings of traditional sound insulation structures in terms of poor low-frequency noise reduction. It not only has good isolation performance for medium and high frequency noise, but also has excellent suppression effect for low frequency noise.

[0018] Second, compared with traditional sound insulation structures, the present invention can effectively protect the internal structure from the influence of harsh external environments, ensure the acoustic performance of the internal structure, and thus ensure the overall noise reduction effect of the present invention.

[0019] Third, the present invention installs sealing strips between the bracket and the first sound insulation mechanism connecting plate and between the bracket and the second sound insulation mechanism connecting plate, which not only avoids rigid contact between the connecting plate and the bracket, but also ensures the sealing performance of the present invention and prevents sound waves from passing directly through the gaps.

[0020] Fourth, the present invention uses fasteners to fix the first sound insulation mechanism and the second sound insulation mechanism on the bracket, which makes construction convenient. When the first sound insulation mechanism or the second sound insulation mechanism is damaged by external forces, the first sound insulation mechanism or the second sound insulation mechanism can be repaired or replaced, which is more convenient and faster.

[0021] Other advantages of the present invention and the technical effects of preferred embodiments will be further described in the following detailed description. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the broadband composite sound insulation structure in this invention;

[0023] Figure 2 This is a cross-sectional view of the first sound insulation mechanism of the broadband composite sound insulation structure in this invention;

[0024] Figure 3 This is a cross-sectional view of the second sound insulation mechanism of the broadband composite sound insulation structure in this invention;

[0025] Figure 4 This is a three-dimensional cross-sectional view of the broadband composite sound insulation structure in this invention.

[0026] Explanation of reference numerals in the attached figures

[0027] Detailed Implementation

[0028] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0029] As mentioned above, in the description of the present invention, it should be noted that the terms "upper" and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention 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. Therefore, they should not be construed as limiting the present invention.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0032] like Figures 1 to 4 As shown, the present invention provides a broadband composite sound insulation structure, including a first sound insulation mechanism 1 and a second sound insulation mechanism 2. The first sound insulation mechanism 1 and the second sound insulation mechanism 2 are disposed opposite to each other and a closed air layer 8 is formed between them.

[0033] In this basic scheme, a first sound insulation mechanism 1, a second sound insulation mechanism 2, and a closed air layer 8 are set according to different noise frequencies. The first sound insulation mechanism 1 can effectively reduce low-frequency noise, the second sound insulation mechanism 2 can reduce mid- and high-frequency noise, and the air layer 8 can attenuate the noise entering the air layer 8 by attenuating the sound waves and continuously reflecting them.

[0034] As a specific embodiment of the present invention, such as Figure 1 As shown, the first sound insulation mechanism 1 includes a pair of first sound insulation panels 101 and a pair of first sound insulation mechanism frames 103 arranged opposite to each other. The first sound insulation panels 101 and the first sound insulation mechanism frames 103 are connected to form a first sound insulation layer 102. When broadband sound waves are incident on the surface of the first sound insulation mechanism 1, the sound wave excitation force is transmitted from the first sound insulation panel 101 on one side of the first sound insulation mechanism 1 to the first sound insulation layer 102, and then to the first sound insulation panel 101 on the other side of the first sound insulation mechanism 1. The first sound insulation layer 102 can be filled with different materials or have different structures to reduce and suppress noise.

[0035] As a preferred embodiment of the present invention, such as Figure 2 As shown, a honeycomb cavity is formed in the first sound insulation layer 102, and the honeycomb cavity is filled with damping particles. When the sound wave vibration is transmitted to the first sound insulation layer 102, the damping particles are excited. Inelastic collisions and friction occur between the damping particles and between the damping particles and the honeycomb structure, which consumes the vibration energy of the vibration system, suppresses vibration, and thus effectively reduces low-frequency noise.

[0036] More preferably, the honeycomb cavity is formed by an aluminum alloy plate, and the damping particles are aluminum particles.

[0037] As another specific structural form of the present invention, such as Figure 1As shown, the second sound insulation mechanism 2 includes a second sound insulation plate 201 and a perforated plate 203 arranged opposite to each other, and a pair of second sound insulation mechanism frames 204 arranged opposite to each other. The second sound insulation mechanism frames 204 are connected to the second sound insulation plate 201 and the perforated plate 203 to form a second sound insulation layer 202. When sound waves pass through the first sound insulation mechanism 1 and the air layer 8 and are transmitted to the second sound insulation mechanism 2, the sound waves propagate through the perforated plate 203 to the second sound insulation layer 202. The second sound insulation layer 202 can be filled with different materials or have different structures to reduce and suppress noise. After the sound waves are isolated by the second sound insulation plate 201, the noise reduction effect is achieved.

[0038] Preferably, such as Figure 3 As shown, the second sound insulation layer 202 is filled with glass wool board or rock wool board, and the surface of the glass wool board or rock wool board is wrapped with alkali-free water-repellent glass fiber cloth.

[0039] As another preferred embodiment of the present invention, such as Figure 1 As shown, the first sound insulation mechanism frame 103 is provided with a first sound insulation mechanism connecting plate 3, and the second sound insulation mechanism frame 204 is provided with a second sound insulation mechanism connecting plate 4. By fixing the first sound insulation mechanism connecting plate 3 and the second sound insulation mechanism connecting plate 4 to the oppositely arranged pair of brackets 5, the first sound insulation mechanism 1 and the second sound insulation mechanism 2 can be installed more conveniently during construction. The perforated plate 203, the first sound insulation plate 101 and the brackets 5 form the air layer 8 to attenuate and continuously reflect sound waves, thereby attenuating the noise entering the air layer 8.

[0040] More preferably, in order to facilitate the maintenance and installation of the present invention, the bracket 5 is fixed between the first sound insulation mechanism connecting plate 3 and the second sound insulation mechanism connecting plate 4 by fasteners 7, so that the first sound insulation mechanism 1 and the second sound insulation mechanism 2 can be disassembled. When the first sound insulation mechanism 1 or the second sound insulation mechanism 2 is damaged by external forces, the first sound insulation mechanism 1 or the second sound insulation mechanism 2 can be repaired or replaced, which is more convenient and quick.

[0041] Furthermore, in order to increase the sealing performance of the present invention, a sealing strip 6 is installed between the bracket 5 and the first sound insulation mechanism connecting plate 3 and between the bracket 5 and the second sound insulation mechanism connecting plate 4. This prevents sound waves from passing directly through the gaps between the bracket 5 and the first sound insulation mechanism connecting plate 3 and between the bracket 5 and the second sound insulation mechanism connecting plate 4, which would reduce the noise reduction effect. At the same time, it can also prevent the first sound insulation mechanism connecting plate 3 and the second sound insulation mechanism connecting plate 4 from rigidly contacting the bracket 5, which would cause damage.

[0042] In another preferred embodiment of the present invention, the first sound insulation plate 101 is an aluminum alloy plate, preferably an aluminum alloy plate with a thickness of 1mm; the second sound insulation plate 201 is a galvanized steel plate, preferably a galvanized steel plate with a thickness of 1.2mm; the perforated plate 203 is an aluminum alloy perforated plate, preferably an aluminum alloy perforated plate with a thickness of 1mm; the first sound insulation mechanism frame 103, the second sound insulation mechanism frame 204, the first sound insulation mechanism connecting plate 3, and the second sound insulation mechanism connecting plate 4 are all steel plates; the first sound insulation mechanism frame 103 and the second sound insulation mechanism frame 204 are preferably steel plates with a thickness of 3mm; the first sound insulation mechanism connecting plate 3 is preferably a steel plate with a thickness of 5mm; and the second sound insulation mechanism connecting plate 4 is preferably a steel plate with a thickness of 10mm.

[0043] To better understand the technical solution and advantages of the present invention, the following description is provided in conjunction with a relatively comprehensive set of technical features.

[0044] Reference Figure 1 In a relatively optimized embodiment of the present invention, the broadband composite sound insulation structure includes a first sound insulation mechanism 1, a second sound insulation mechanism 2, and a closed air layer 8 located between the first sound insulation mechanism 1 and the second sound insulation mechanism 2. The first sound insulation mechanism 1 includes a pair of oppositely arranged first sound insulation plates 101 and a pair of oppositely arranged first sound insulation mechanism frames 103. The first sound insulation plates 101 are preferably aluminum alloy plates with a thickness of 1 mm, and the first sound insulation mechanism frames 103 are preferably steel plates with a thickness of 3 mm. The first sound insulation mechanism frames 103 are provided with first sound insulation mechanism connecting plates 3, which are preferably steel plates with a thickness of 5 mm. The first sound insulation plates 101 and the first sound insulation mechanism frames 103 are connected to form a first sound insulation layer 102. The first sound insulation layer 102 has a honeycomb-shaped cavity formed by the aluminum alloy plate, and the honeycomb-shaped cavity is filled with aluminum particle damping. The second sound insulation mechanism 2 includes an oppositely arranged second sound insulation plate 201 and a perforated plate 203, as well as a pair of oppositely arranged... The second sound insulation mechanism frame 204, the second sound insulation plate 201 preferably being a 1.2mm thick galvanized steel plate, the perforated plate 203 preferably being a 1mm thick aluminum alloy perforated plate, the second sound insulation mechanism frame 204 preferably being a 3mm thick steel plate, and the second sound insulation mechanism frame 204 being provided with a second sound insulation mechanism connecting plate 4, preferably being a 10mm thick steel plate, the second sound insulation mechanism frame 204 being connected to the second sound insulation plate 201 and the perforated plate 203 to form The second sound insulation layer 202 is filled with glass panels or rock wool boards. The surface of the glass panels or rock wool boards is covered with alkali-free water-repellent glass fiber cloth. Pairs of brackets 5 are fixed between the first sound insulation mechanism connecting plate 3 and the second sound insulation mechanism connecting plate 4 by fasteners 7. Sealing strips 6 are installed between the brackets 5 and the first sound insulation mechanism connecting plate 3 and between the brackets 5 and the second sound insulation mechanism connecting plate 4. The perforated plate 203, the first sound insulation plate 101 and the brackets 5 form an air layer 8.

[0045] The broadband composite sound insulation structure provided in the above embodiment, when broadband noise is incident on the surface of the first sound insulation mechanism 1, the sound wave excitation force is transmitted from the first sound insulation plate 101 on one side of the first sound insulation mechanism 1 to the first sound insulation layer 102, and then to the first sound insulation plate 101 on the other side of the first sound insulation mechanism 1. In the transmission path, the sound wave vibration is transmitted from the surface of the first sound insulation mechanism 1 to the aluminum particle damping through the honeycomb cavity. The aluminum particle damping is excited, and inelastic collisions and friction occur between the damping particles and between the damping particles and the honeycomb structure, which consumes the vibration energy of the vibration system, suppresses vibration, and thus effectively reduces low-frequency noise.

[0046] An air layer 8 is provided between the first sound insulation mechanism 1 and the second sound insulation mechanism 2. After the sound wave penetrates the first sound insulation mechanism 1, it propagates to the air layer 8. After air attenuation and continuous reflection, the sound wave transmitted to the air layer 8 is further attenuated, consuming sound wave vibration and reducing noise.

[0047] After passing through the first sound insulation mechanism 1 and the air layer 8, the sound wave is transmitted to the second sound insulation mechanism 2. The sound wave propagates through the first perforated plate 203 to the second sound insulation layer 202, which is filled with glass wool board or rock wool board. The sound wave propagates in the tiny gaps and continuous holes in the glass wool board or rock wool board, causing the air in the gaps or holes to vibrate, resulting in friction between the air and the glass wool board or rock wool board. Due to friction and viscosity, the sound energy is converted into heat energy, thereby reducing mid- and high-frequency noise. Finally, the sound wave passes through the sound insulation effect of the second sound insulation plate 201, effectively reducing noise.

[0048] As can be seen from the above technical solution, the broadband composite sound insulation structure of the present invention, by setting the first sound insulation mechanism 1, the air layer 8, and the second sound insulation mechanism 2, not only has good isolation performance for mid- and high-frequency noise, but also has excellent suppression effect on low-frequency noise. Because of the setting of the first sound insulation plate 101 and the second sound insulation plate 201, the internal structure of the first sound insulation layer 102 and the second sound insulation layer 202 is effectively protected, avoiding the influence of the external environment on the internal structure of the present invention, thereby ensuring the overall noise reduction effect of the present invention. The first sound insulation mechanism 1 and the second sound insulation mechanism 2 are fixed to the bracket 5 by fasteners 7, which greatly facilitates construction. When the first sound insulation mechanism 1 or the second sound insulation mechanism 2 is damaged by external forces, it can be repaired or replaced more conveniently and quickly. A sealing strip 6 is installed between the bracket 5 and the first sound insulation mechanism connecting plate 3, and between the bracket 5 and the second sound insulation mechanism connecting plate 4, to prevent sound waves from passing directly through the gaps between the bracket 5 and the first sound insulation mechanism connecting plate 3, and between the bracket 5 and the second sound insulation mechanism connecting plate 4, which would reduce the noise reduction effect. At the same time, it can also prevent the first sound insulation mechanism connecting plate 3 and the second sound insulation mechanism connecting plate 4 from rigidly contacting the bracket 5, which would cause damage.

[0049] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0050] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. As long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A broadband composite sound insulation structure, characterized in that, It includes a first sound insulation mechanism (1) and a second sound insulation mechanism (2), wherein the first sound insulation mechanism (1) and the second sound insulation mechanism (2) are arranged opposite to each other and a closed air layer (8) is formed between them; The first sound insulation mechanism (1) includes a pair of first sound insulation panels (101) arranged opposite to each other and a pair of first sound insulation mechanism frames (103) arranged opposite to each other. The first sound insulation panels (101) are connected to the first sound insulation mechanism frames (103) to form a first sound insulation layer (102). A honeycomb cavity is formed in the first sound insulation layer (102), and the honeycomb cavity is filled with damping particles. The second sound insulation mechanism (2) includes a second sound insulation board (201) and a perforated board (203) arranged opposite to each other, and a pair of second sound insulation mechanism frames (204) arranged opposite to each other. The second sound insulation mechanism frame (204) is connected to the second sound insulation board (201) and the perforated board (203) to form a second sound insulation layer (202). The second sound insulation layer (202) is filled with glass wool board or rock wool board, and the surface of the glass wool board or rock wool board is wrapped with alkali-free water-repellent glass fiber cloth. The first sound insulation mechanism frame (103) is provided with a first sound insulation mechanism connecting plate (3), and the second sound insulation mechanism frame (204) is provided with a second sound insulation mechanism connecting plate (4). A pair of oppositely arranged brackets (5) are fixed between the first sound insulation mechanism connecting plate (3) and the second sound insulation mechanism connecting plate (4). The perforated plate (203), the first sound insulation plate (101) and the brackets (5) form the air layer (8). A sealing strip (6) is installed between the brackets (5) and the first sound insulation mechanism connecting plate (3) and between the brackets (5) and the second sound insulation mechanism connecting plate (4).

2. The broadband composite sound insulation structure according to claim 1, characterized in that, The honeycomb-shaped cavity is formed by an aluminum alloy plate, and the damping particles are aluminum particles.

3. The broadband composite sound insulation structure according to claim 1, characterized in that, The bracket (5) is fixed between the first sound insulation mechanism connecting plate (3) and the second sound insulation mechanism connecting plate (4) by fasteners (7).

4. The broadband composite sound insulation structure according to claim 1, characterized in that, The first sound insulation board (101) is an aluminum alloy plate, the second sound insulation board (201) is a galvanized steel plate, the perforated plate (203) is an aluminum alloy perforated plate, and the first sound insulation mechanism frame (103), the second sound insulation mechanism frame (204), the first sound insulation mechanism connecting plate (3) and the second sound insulation mechanism connecting plate (4) are all steel plates.

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