Efficient sound absorption layer structure

Abstract

The invention discloses an efficient sound-absorbing layer structure which comprises a metal plate and a sound-absorbing interlayer attached to the surface of the metal plate, the sound-absorbing interlayer comprises a sound-absorbing base layer, a plurality of groups of sound-absorbing columns, a sound guiding mechanism and silencing balls, the sound-absorbing columns are uniformly distributed on the surface of the sound-absorbing base layer, and a sound-absorbing cavity is defined by every four adjacent groups of sound-absorbing columns; the sound guide mechanism is arranged in the sound absorption cavity and comprises a sound hole and an embedded groove formed in the lower end of the sound hole, the embedded groove is formed in the sound absorption base layer, the noise reduction ball is composed of two parts including a guide column and a noise reduction ball fixed to the bottom of the guide column, and a cavity channel is machined and formed in the guide column and arranged in the sound hole; the noise reduction ball is arranged in the embedded groove and comprises an outer ball body and a plurality of sets of noise reduction blades arranged in the outer ball body, and the outer ball body is of a hollow spherical structure. The noise absorption effect of the sound absorption layer can be effectively improved, and the sound absorption effect is improved on the basis that the thickness of the sound absorption layer is not increased.

Description

Technical Field

[0001] The invention relates to the technical field of sound absorbing layers, in particular to a high-efficiency sound absorbing layer structure. Background Art

[0002] The sound-absorbing layer is a material layer used to reduce the reflection of sound waves and absorb noise in the environment. It is usually composed of sound-absorbing materials, has good acoustic properties, can absorb sound energy from the sound source, and reduce the propagation and reflection of sound waves. The main function of the sound-absorbing layer is to improve the acoustic characteristics of the indoor environment, reduce noise pollution and sound reflection. It can reduce the propagation and diffusion of noise, and improve the clarity and audibility of sound. The sound-absorbing layer can absorb most of the energy of sound waves, convert it into weak heat energy or other forms of energy, and reduce the reflection and echo of sound in the space. The sound-absorbing layer is usually used in various buildings and indoor environments, such as conference rooms, recording studios, theaters, restaurants, offices, schools, etc. They can be installed on surfaces such as walls, ceilings, floors, soundproof panels, etc. to provide a good acoustic environment. The materials of the sound-absorbing layer can include sound-absorbing foam, sound-absorbing cotton, sound-absorbing panels, fiberboards, etc. These materials have open-pore structures or porous structures and can effectively absorb the energy of sound waves. The characteristics and effects of the sound-absorbing layer are affected by factors such as the type, thickness, surface structure and installation location of the sound-absorbing material. Different sound-absorbing layers have different sound-absorbing frequency ranges and sound-absorbing coefficients. Therefore, when selecting and designing sound-absorbing layers, it is necessary to consider the required sound-absorbing effect and target frequency range. The various sound-absorbing materials mainly include the following: Sound-absorbing foam: Sound-absorbing foam is an open-cell foam material with good sound-absorbing properties. It is usually made of polymer materials (such as polyester or polyether) and has a fine pore structure that can effectively absorb the energy of sound waves. Sound-absorbing cotton: Sound-absorbing cotton is a fiber material, and common ones are glass fiber wool and rock wool. They have a porous structure and a high specific surface area, which can absorb sound waves and convert them into heat energy. Sound-absorbing board: Sound-absorbing board is a sound-absorbing material based on wood or fiberboard, and the surface usually has a special concave-convex structure or micropores, which can effectively scatter and absorb sound waves. Fiberboard: Fiberboard is a board made of fiber material (such as wood fiber or plant fiber), with an open-cell structure and porosity, which can absorb sound waves and reduce the reflection of sound. Sound fiber board: Sound fiber board is a board composed of wood fiber and adhesive, which has good sound absorption performance. It is often used in places that require high-quality sound effects, such as concert halls and recording studios. Sound hole board: Sound hole board is a sound-absorbing material designed by opening holes in a thin plate. These small holes can suppress the reflection and propagation of sound waves, achieving a sound-absorbing effect. Sound fiber: Sound fiber is a sound-absorbing material made of special fiber materials with high sound absorption performance. It can be made into sound-absorbing panels, sound-absorbing tiles, etc., and is widely used in the fields of construction and interior decoration. For the use of some metal plates, it is sometimes necessary to add a sound-absorbing layer on the surface of the plate to improve the noise reduction effect of the metal plate during use through the sound-absorbing layer, such as aluminum plates.

[0003] However, the existing sound-absorbing layer of metal plates has the following problems during use: the existing sound-absorbing layer used on metal plates mostly uses sound-absorbing cotton with a certain thickness for sound absorption treatment, and the structure of the sound-absorbing cotton is relatively simple, and the sound absorption treatment is mainly carried out by its own sound-absorbing material. During long-term use, the sound-absorbing cotton is affected by the external environment, such as moisture or dirt, which easily leads to a decrease in the noise reduction effect of the sound-absorbing layer, and the thickness of the sound-absorbing layer directly affects the sound absorption effect. Improving the sound absorption effect by simply increasing the thickness of the sound-absorbing layer will affect the thickness of the metal plate. Therefore, it is necessary to design a corresponding technical solution to solve the existing technical problems. Summary of the invention

[0004] The purpose of the present invention is to provide a high-efficiency sound-absorbing layer structure, which solves the technical problem that most of the existing sound-absorbing layers used on metal plates use sound-absorbing cotton with a certain thickness for sound absorption treatment, and the structure of the sound-absorbing cotton is relatively simple, and the sound absorption treatment is mainly carried out by its own sound-absorbing material. During long-term use, the sound-absorbing cotton is affected by the external environment, such as moisture or dirt, which can easily lead to a decrease in the noise reduction effect of the sound-absorbing layer, and the thickness of the sound-absorbing layer directly affects the sound absorption effect, and the sound absorption effect is improved by simply increasing the thickness of the sound-absorbing layer, which will affect the thickness of the metal plate. The present invention designs a high-efficiency sound-absorbing layer for use on metal plates, the high-efficiency sound-absorbing layer includes a sound-absorbing base layer, a sound-absorbing column, a sound-guiding mechanism and a sound-absorbing ball. The sound-absorbing columns distributed on the sound-absorbing base layer can absorb and guide the noise and introduce the noise into the sound-guiding mechanism, and then introduce the noise into the sound-absorbing ball through the sound-guiding mechanism, and then the noise is further reduced by the sound-absorbing ball.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-efficiency sound-absorbing layer structure, comprising a metal plate and a sound-absorbing insulation layer attached to the surface of the metal plate, the sound-absorbing insulation layer comprising a sound-absorbing base layer, a sound-absorbing column, a sound-guiding mechanism and a sound-absorbing ball, the sound-absorbing columns are divided into a plurality of groups and are evenly distributed on the surface of the sound-absorbing base layer, four adjacent groups of the sound-absorbing columns form a sound-absorbing cavity, the sound-guiding mechanism is built into the sound-absorbing cavity, the sound-guiding mechanism comprises a sound hole and an embedded groove opened at the lower end of the sound hole, the embedded groove is opened inside the sound-absorbing base layer, the sound-absorbing ball The sound ball is composed of two parts, namely a guide column and a noise reduction ball fixed at the bottom of the guide column. The guide column is internally processed with a cavity and built into the sound hole. The noise reduction ball is built into the embedded groove. The noise reduction ball includes an outer sphere and several groups of noise reduction blades built into the outer sphere. The outer sphere is a hollow spherical structure. The noise reduction blades are divided into several groups and are evenly distributed inside the outer sphere. The noise reduction blades are fan-shaped as a whole and have several groups of spacing grooves on the surface. A blade body is formed between two adjacent groups of the spacing grooves.

[0006] As a preferred embodiment of the present invention, the sound-absorbing base layer is made of a sound-absorbing sponge material, the thickness of the sound-absorbing base layer is 1 cm-3 cm, and the interior of the sound-absorbing base layer is a honeycomb structure.

[0007] As a preferred embodiment of the present invention, the sound-absorbing column has a quadrangular pyramid structure and the surface of each side has a concave structure. The surface of the sound-absorbing column has a porous structure and a plurality of noise reduction strips are formed on the surface. The noise reduction strips have a long strip structure and are made of the same sound-absorbing sponge material as the sound-absorbing column.

[0008] As a preferred embodiment of the present invention, the outer ends of several groups of the noise reduction strips are in contact with the guide column, and the lengths of several groups of the noise reduction strips are different and they are centrally distributed in the middle of the side of the sound absorbing column.

[0009] As a preferred embodiment of the present invention, a plurality of groups of noise reduction rings are formed inside the guide column, and the plurality of groups of noise reduction rings are concentrically distributed. The noise reduction rings are composed of a plurality of groups of semi-annular spacers, and the plurality of groups of semi-annular spacers are distributed in a ring shape, and the semi-annular spacers located on the outside are larger than the semi-annular spacers on the inside.

[0010] As a preferred embodiment of the present invention, a gap is formed between two adjacent groups of semi-annular spacers, and the inner wall of the gap is a porous structure.

[0011] As a preferred embodiment of the present invention, the inner diameter of the guide column is equal to one third of the inner diameter of the outer sphere, and the lower end of the guide column is located at the center of the outer sphere.

[0012] As a preferred embodiment of the present invention, the thickness of the outer end of the blade body is greater than the thickness of the inner end, and the surface of the blade body has a porous structure.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The present invention designs a high-efficiency sound-absorbing layer for use on metal plates, which includes a sound-absorbing base layer, sound-absorbing columns, a sound-guiding mechanism and a sound-absorbing ball. The sound-absorbing columns distributed on the sound-absorbing base layer can absorb and guide the noise and guide the noise into the sound-guiding mechanism, and then guide the noise into the sound-absorbing ball through the sound-guiding mechanism, and then further reduce the noise through the sound-absorbing ball.

[0015] 2. The present invention optimizes the structure of the high-efficiency sound-absorbing layer, which can effectively improve the noise absorption effect of the sound-absorbing layer and improve the sound absorption effect without increasing the thickness of the sound-absorbing layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is the overall structure diagram of the present invention;

[0017] Figure 2 This is a top view of the sound-absorbing column of the present invention;

[0018] Figure 3 This is a distribution structure diagram of four adjacent groups of sound-absorbing columns of the present invention;

[0019] Figure 4 This is a structural diagram of the silencer ball of the present invention;

[0020] Figure 5 It is a cross-sectional view of the interior of the outer sphere described in the present invention.

[0021] In the figure: 1. Metal plate; 2. Sound-absorbing base layer; 3. Sound-absorbing column; 4. Sound-guiding mechanism; 5. Silence ball; 6. Sound-absorbing cavity; 7. Sound hole; 8. Embedded groove; 9. Guide column; 10. Noise-reducing ball; 11. Cavity; 12. Outer sphere; 13. Noise-reducing blade; 14. Spacer groove; 15. Blade body; 16. Noise-reducing strip; 17. Noise-reducing ring; 18. Semi-annular spacer; 19. Gap opening. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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.

[0023] See also Figure 1-5The present invention provides a technical solution: a high-efficiency sound-absorbing layer structure, comprising a metal plate 1 and a sound-absorbing insulation layer attached to the surface of the metal plate 1, the sound-absorbing insulation layer comprising a sound-absorbing base layer 2, a sound-absorbing column 3, a sound-guiding mechanism 4 and a sound-absorbing ball 5, the sound-absorbing column 3 is divided into several groups and is evenly distributed on the surface of the sound-absorbing base layer 2, four adjacent groups of sound-absorbing columns 3 form a sound-absorbing cavity 6, the sound-guiding mechanism 4 is built in the sound-absorbing cavity 6, the sound-guiding mechanism 4 comprises a sound hole 7 and an embedded groove 8 opened at the lower end of the sound hole 7, the embedded groove 8 is opened inside the sound-absorbing base layer 2, the sound-absorbing ball 5 consists of two parts, namely a guide column 9 and a noise-reducing ball 10 fixed at the bottom of the guide column 9, the guide column 9 is internally machined to have a cavity 11 and is built in the sound hole 7, the noise-reducing ball 10 is built in the embedded groove 8, the noise-reducing ball 10 comprises an outer sphere 12 and several groups of noise-reducing blades 13 built in the outer sphere 12, the outer sphere 12 is hollow The spherical structure is characterized in that the noise reduction blades 13 are divided into several groups and are evenly distributed inside the outer sphere 12. The noise reduction blades 13 are fan-shaped as a whole and are provided with several groups of spacing grooves 14 on the surface. A blade body 15 is formed between two adjacent groups of spacing grooves 14. When the noise generation area transmits the noise to the position of the metal plate 1, the noise is first absorbed by the sound-absorbing column 3 on the surface of the sound-absorbing insulation layer and guided into the sound-absorbing cavity 6. The distribution of several groups of noise reduction strips 16 on the periphery of the sound-absorbing cavity 6 can be used to perform layer-by-layer noise reduction treatment on the passing noise. A small amount of noise after treatment enters the silencing ball 5 along the sound guide mechanism 4. The noise reduction rings 17 distributed concentrically can effectively improve the noise absorption effect. Finally, the consumed noise is guided into the outer sphere 12, and the noise is absorbed in a closed manner by the outer sphere 12, and the internal noise reduction blades 13 are used to achieve all-round absorption treatment.

[0024] Further improvement, such as Figure 1 As shown: the sound-absorbing base layer 2 is made of sound-absorbing sponge material, the thickness of the sound-absorbing base layer 2 is 1cm-3cm, and the interior of the sound-absorbing base layer 2 is a honeycomb structure. The honeycomb design inside the sound-absorbing base layer 2 can improve the noise absorption effect.

[0025] Further improvement, such as Figure 2 As shown: the sound-absorbing column 3 has a quadrangular pyramid structure and the surface of each side has a concave structure. The surface of the sound-absorbing column 3 has a porous structure and a plurality of groups of noise reduction strips 16 are formed on the surface. The noise reduction strips 16 have a long strip structure and are made of the same sound-absorbing sponge material as the sound-absorbing column 3. The concave structure can centrally guide the noise and cooperate with the noise reduction strips 16 to reduce noise.

[0026] Further improvement, such as Figure 3 As shown: the outer ends of several groups of noise reduction strips 16 are in contact with the guide column 9, and the lengths of several groups of noise reduction strips 16 are different and they are concentrated in the middle of the sides of the sound-absorbing column 3. Through the distribution of the noise reduction strips 16, the passing noise can be reduced layer by layer.

[0027] Further improvement, such as Figure 3 As shown: a plurality of groups of noise reduction rings 17 are formed inside the guide column 9, and the plurality of groups of noise reduction rings 17 are concentrically distributed. The noise reduction rings 17 are composed of a plurality of groups of semi-annular spacers 18, and the plurality of groups of semi-annular spacers 18 are distributed in a ring shape. The semi-annular spacers 18 on the outside are larger than the semi-annular spacers 18 on the inside. This concentric distribution can effectively improve the noise absorption effect.

[0028] Further improvement, such as Figure 3 As shown: a gap 19 is formed between two adjacent groups of semi-annular spacers 18, and the inner wall of the gap 19 is a porous structure. This design can better absorb the passing noise.

[0029] Further improvement, such as Figure 4 As shown: the inner diameter of the guide column 9 is equal to one third of the inner diameter of the outer sphere 12, and the lower end of the guide column 9 is located at the center of the outer sphere 12, which is convenient for guiding the noise along the guide column 9 into the interior of the outer sphere 12 and performing targeted treatment on the noise.

[0030] Specifically, the thickness of the outer end of the blade body 15 is greater than the thickness of the inner end, and the surface of the blade body 15 has a porous structure. Such a design can achieve the effect of noise absorption by the blade body 15 .

[0031] When in use: When the noise generation area of ​​the present invention transmits the noise to the position of the metal plate 1, the noise is first absorbed by the sound-absorbing column 3 on the surface of the sound-absorbing insulation layer and guided into the sound-absorbing cavity 6. The distribution of several groups of noise reduction strips 16 on the periphery of the sound-absorbing cavity 6 can perform layer-by-layer noise reduction treatment on the passing noise. The small amount of noise after treatment enters the silencer ball 5 along the sound guide mechanism 4. The noise absorption effect can be effectively improved by the concentrically distributed noise reduction rings 17. Finally, the consumed noise is guided into the outer sphere 12, and the noise is absorbed in a closed manner by the outer sphere 12. The internal noise reduction blades 13 are used to achieve all-round absorption treatment.

[0032] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0034] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. 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.

Claims

1. A high-efficiency sound-absorbing layer structure, comprising a metal plate (1) and a sound-absorbing insulation layer attached to the surface of the metal plate (1), characterized in that: The sound-absorbing insulation layer comprises a sound-absorbing base layer (2), a sound-absorbing column (3), a sound-guiding mechanism (4) and a sound-absorbing ball (5). The sound-absorbing columns (3) are divided into a plurality of groups and are evenly distributed on the surface of the sound-absorbing base layer (2). Four adjacent groups of the sound-absorbing columns (3) form a sound-absorbing cavity (6). The sound-guiding mechanism (4) is built into the sound-absorbing cavity (6). The sound-guiding mechanism (4) comprises a sound hole (7) and an embedded groove (8) provided at the lower end of the sound hole (7). The embedded groove (8) is provided inside the sound-absorbing base layer (2). The sound-absorbing ball (5) consists of two parts, namely a guide column (9) and a noise-reducing ball (1) fixed to the bottom of the guide column (9). 0), the guide column (9) is internally machined to form a cavity (11) and is built into the sound hole (7), the noise reduction ball (10) is built into the embedded groove (8), the noise reduction ball (10) comprises an outer sphere (12) and a plurality of groups of noise reduction blades (13) built into the outer sphere (12), the outer sphere (12) is a hollow spherical structure, the noise reduction blades (13) are divided into a plurality of groups and are evenly distributed inside the outer sphere (12), the noise reduction blades (13) are overall in a fan-shaped structure and a plurality of groups of spacing grooves (14) are opened on the surface, and a blade body (15) is formed between two adjacent groups of the spacing grooves (14).

2. The high-efficiency sound-absorbing layer structure according to claim 1, characterized in that: The sound-absorbing base layer (2) is made of a sound-absorbing sponge material, the thickness of the sound-absorbing base layer (2) is 1 cm-3 cm, and the interior of the sound-absorbing base layer (2) is a honeycomb structure.

3. The high-efficiency sound-absorbing layer structure according to claim 1, characterized in that: The sound-absorbing column (3) has a quadrangular pyramid structure and the surface of each side has an inwardly concave structure. The surface of the sound-absorbing column (3) has a porous structure and a plurality of groups of noise reduction strips (16) are formed on the surface. The noise reduction strips (16) have a long strip structure and are made of the same sound-absorbing sponge material as the sound-absorbing column (3).

4. The high-efficiency sound-absorbing layer structure according to claim 3, characterized in that: The outer ends of the plurality of groups of noise reduction strips (16) are in contact with the guide column (9); the plurality of groups of noise reduction strips (16) have different lengths and are centrally distributed in the middle of the side of the sound absorbing column (3).

5. The high-efficiency sound-absorbing layer structure according to claim 4, characterized in that: The guide column (9) is internally machined with a plurality of groups of noise reduction rings (17), the plurality of groups of noise reduction rings (17) are concentrically distributed, the noise reduction rings (17) are composed of a plurality of groups of semi-annular spacers (18), the plurality of groups of semi-annular spacers (18) are annularly distributed, and the semi-annular spacers (18) located on the outside are larger than the semi-annular spacers (18) located on the inside.

6. The high-efficiency sound-absorbing layer structure according to claim 5, characterized in that: A gap opening (19) is formed between two adjacent groups of semi-annular spacers (18) at the inside and outside, and the inner wall of the gap opening (19) is a porous structure.

7. The high-efficiency sound-absorbing layer structure according to claim 5, characterized in that: The inner diameter of the guide column (9) is equal to one third of the inner diameter of the outer sphere (12), and the lower end of the guide column (9) is located at the center of the outer sphere (12).

8. The high-efficiency sound-absorbing layer structure according to claim 1, characterized in that: The thickness of the outer end of the blade body (15) is greater than the thickness of the inner end, and the surface of the blade body (15) presents a porous structure.

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