Multi-layer composite acoustic board

Abstract

The utility model relates to a multi-layer composite sound-absorbing board, and discloses a multi-layer composite sound-absorbing board which is provided with a double-layer sound-absorbing core board, and sound-absorbing frequency range is expanded and sound-absorbing effect is improved through different shapes, sizes, densities and arrangement modes of sound-absorbing micropores on the double-layer sound-absorbing core board. The utility model discloses a sound-absorbing composite board which is characterized by comprising a first sound-absorbing micropore, a first sound-absorbing core board, a second sound-absorbing core board, a sound-absorbing mat, a sound-absorbing frame, a connecting groove, a second sound-absorbing micropore and a connecting lock catch, the sound-absorbing mat is arranged in the sound-absorbing frame, the connecting groove is formed in the side face of the sound-absorbing frame, the second sound-absorbing core board is arranged in the sound-absorbing frame and located on the sound-absorbing mat, and the connecting lock catch is arranged on the second sound-absorbing micropore. The first sound-absorbing core plate is arranged in the sound-absorbing frame and located on the second sound-absorbing core plate, the second sound-absorbing core plate is provided with second sound-absorbing micropores, the first sound-absorbing core plate is arranged in the sound-absorbing frame and located on the second sound-absorbing core plate, the first sound-absorbing core plate is provided with first sound-absorbing micropores, and the side face of the first sound-absorbing core plate is provided with connecting lock catches corresponding to the connecting grooves.

Description

Technical Field

[0001] The utility model discloses a multi-layer composite sound-absorbing board, which relates to a composite sound-absorbing board with a multi-layer core material, and belongs to the technical field of sound absorption and noise reduction, and in particular to a multi-layer composite sound-absorbing board which expands the sound absorption frequency range and improves the sound absorption effect by opening sound-absorbing micropores of different shapes, sizes, densities and arrangements on the multi-layer sound-absorbing core board. Background Art

[0002] Sound-absorbing board is an ideal sound-absorbing decorative material with functions such as sound absorption, flame retardancy and heat insulation. Microporous sound-absorbing board is widely used in theaters, concert halls, conference rooms and other places due to its high strength, light weight and convenience for small batch customization. Microporous sound-absorbing board is usually composed of facing, core material and sound-absorbing thin felt. Small holes are opened on the surface of the core material. Sound enters the holes of the sound-absorbing board and vibrates with the internal cavity to convert sound energy into heat energy for sound absorption. Existing microporous sound-absorbing boards usually have sound-absorbing micropores on the surface of a single-layer core board. The size, density, shape and arrangement of the holes are fixed, and can only absorb sound of a single frequency band. The sound absorption frequency range is small and the sound absorption effect is not ideal. Summary of the invention

[0003] In order to improve the above situation, the utility model provides a multi-layer composite sound-absorbing board which expands the sound absorption frequency range and improves the sound absorption effect by setting a double-layer sound-absorbing core board with sound-absorbing micropores on the double-layer sound-absorbing core board having different shapes, sizes, densities and arrangements.

[0004] The utility model discloses a multi-layer composite sound-absorbing board, which is realized as follows: the utility model discloses a multi-layer composite sound-absorbing board, which is composed of a first sound-absorbing micropore, a first sound-absorbing core board, a second sound-absorbing core board, a sound-absorbing thin felt, a sound-absorbing frame, a connecting groove, a second sound-absorbing micropore and a connecting lock buckle.

[0005] The sound-absorbing felt is placed in the sound-absorbing frame, and a connecting groove is opened on the side of the sound-absorbing frame.

[0006] Preferably, the sound-absorbing frame is a rectangular structure, and the sound-absorbing felt is tightly connected to the bottom plate of the sound-absorbing frame.

[0007] Preferably, the number of the connecting slots is greater than 1.

[0008] The second sound-absorbing core board is placed in the sound-absorbing frame and on the sound-absorbing felt. The second sound-absorbing core board is provided with second sound-absorbing micro-holes.

[0009] Preferably, the second sound-absorbing core panel is formed by splicing a plurality of rectangular core panels.

[0010] Preferably, there are a plurality of the second sound-absorbing micropores.

[0011] Preferably, the second sound-absorbing micropores are in the shape of a circle, an ellipse, a rectangle, a diamond, a pentagon, a hexagon, an octagon, a cross, or a combination of the above.

[0012] Preferably, the second sound-absorbing micropores have rough pore walls.

[0013] The first sound-absorbing core board is placed in the sound-absorbing frame and on the second sound-absorbing core board. The first sound-absorbing core board is provided with first sound-absorbing microholes. A connecting lock corresponding to the connecting groove is arranged on the side of the first sound-absorbing core board.

[0014] Preferably, there are a plurality of the first sound-absorbing micropores, and the plurality of the first sound-absorbing micropores and the plurality of the second sound-absorbing micropores are arranged alternately.

[0015] Preferably, the aperture of the first sound-absorbing micropore is larger than the aperture of the second sound-absorbing micropore, and the aperture of the first sound-absorbing micropore gradually increases from one end to the other end.

[0016] Preferably, the first sound-absorbing micropores have rough pore walls.

[0017] Preferably, the shape of the first sound-absorbing micropore is one or a combination of circular, elliptical, rectangular, rhombus, pentagonal, hexagonal, octagonal, and cross-shaped, and the shape of the first sound-absorbing micropore is different from the shape of the second sound-absorbing micropore;

[0018] Furthermore, the first sound-absorbing core board and the second sound-absorbing core board are provided with sound-absorbing cotton, one side of the sound-absorbing cotton is connected to the first sound-absorbing core board, and the other side of the sound-absorbing cotton is connected to the second sound-absorbing core board, and the surface of the sound-absorbing cotton is rough;

[0019] Furthermore, a plurality of composite sound-absorbing micropores are formed on the first sound-absorbing core plate, the plurality of composite sound-absorbing micropores and the plurality of first sound-absorbing micropores are arranged alternately, the aperture of the composite sound-absorbing micropores is smaller than the aperture of the first sound-absorbing micropores, and the aperture of the composite sound-absorbing micropores is larger than the aperture of the second sound-absorbing micropores. Beneficial Effects

[0020] 1. The sound absorption frequency range can be expanded by opening sound-absorbing micropores of different shapes, sizes, densities and arrangements on the multi-layer sound-absorbing core board, and the sound absorption effect is better.

[0021] 2. Simple structure and easy to use.

[0022] 3. Low cost and easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional structural diagram of a multi-layer composite sound-absorbing board of the utility model;

[0024] Figure 2This is a three-dimensional structural diagram of a multi-layer composite sound-absorbing board of the utility model;

[0025] Figure 3 This is a three-dimensional structural diagram of a multi-layer composite sound-absorbing panel after assembly according to the utility model;

[0026] Figure 4 This is a structural schematic diagram of Example 2 of a multi-layer composite sound-absorbing board of the utility model;

[0027] Figure 5 This is a schematic structural diagram of Example 3 of a multi-layer composite sound-absorbing panel of the utility model.

[0028] Attached photos

[0029] The first sound-absorbing microhole (1), the first sound-absorbing core board (2), the second sound-absorbing core board (3), the sound-absorbing thin felt (4), the sound-absorbing frame (5), the connecting groove (6), the second sound-absorbing microhole (7), the connecting lock (8),

[0030] Sound-absorbing cotton (9), composite sound-absorbing microporous (10) DETAILED DESCRIPTION Example 1

[0031] The utility model discloses a multi-layer composite sound-absorbing board, which comprises a first sound-absorbing micropore (1), a first sound-absorbing core board (2), a second sound-absorbing core board (3), a sound-absorbing thin felt (4), a sound-absorbing frame (5), a connecting groove (6), a second sound-absorbing micropore (7) and a connecting lock buckle (8).

[0032] The sound-absorbing felt (4) is placed in the sound-absorbing frame (5), and a connecting groove (6) is provided on the side of the sound-absorbing frame (5).

[0033] Preferably, the sound absorbing frame (5) is a rectangular structure, and the sound absorbing felt (4) and the bottom plate of the sound absorbing frame (5) are tightly connected.

[0034] Preferably, the number of the connecting grooves (6) is greater than one.

[0035] The second sound-absorbing core board (3) is placed in the sound-absorbing frame (5) and is located on the sound-absorbing felt (4). The second sound-absorbing core board (3) is provided with second sound-absorbing micropores (7).

[0036] Preferably, the second sound-absorbing core panel (3) is formed by splicing a plurality of rectangular core panels.

[0037] Preferably, there are a plurality of the second sound-absorbing micropores (7), and the plurality of the second sound-absorbing micropores (7) are arranged in a matrix or honeycomb pattern on the second sound-absorbing core board (3).

[0038] Preferably, the shape of the second sound-absorbing micropores (7) is one or a combination of circular, elliptical, rectangular, rhombus, pentagonal, hexagonal, octagonal, and cross shapes.

[0039] Preferably, the second sound-absorbing micropores (7) have rough pore walls.

[0040] The first sound-absorbing core board (2) is placed in the sound-absorbing frame (5) and is located on the second sound-absorbing core board (3). The first sound-absorbing core board (2) is provided with a first sound-absorbing micro hole (1). A connecting lock (8) corresponding to the connecting groove (6) is provided on the side of the first sound-absorbing core board (2).

[0041] Preferably, the connecting lock (8) is clamped in the connecting groove (6) to lock the first sound-absorbing core board (2) in the sound-absorbing frame (5), and at the same time, the first sound-absorbing core board (2) presses the second sound-absorbing core board (3) and the sound-absorbing felt (4) in the sound-absorbing frame (5).

[0042] Preferably, the surface of the first sound-absorbing core board (2) is provided with a decorative veneer.

[0043] Preferably, there are a plurality of the first sound-absorbing micropores (1), and the plurality of the first sound-absorbing micropores (1) and the plurality of the second sound-absorbing micropores (7) are arranged in a staggered manner.

[0044] Preferably, the aperture of the first sound-absorbing micropore (1) is larger than the aperture of the second sound-absorbing micropore (7), and the aperture of the first sound-absorbing micropore (1) gradually increases from one end to the other end.

[0045] Preferably, the first sound-absorbing micropores (1) have rough pore walls.

[0046] The plurality of first sound-absorbing micropores (1) are arranged in a matrix or honeycomb pattern on the first sound-absorbing core board (2).

[0047] Preferably, the shape of the first sound-absorbing micropore (1) is one or a combination of a circle, an ellipse, a rectangle, a rhombus, a pentagon, a hexagon, an octagon, and a cross, and the shape of the first sound-absorbing micropore (1) is different from the shape of the second sound-absorbing micropore (7);

[0048] When in use, the sound-absorbing panel is installed on the front or top plate. When the sound is transmitted to the first sound-absorbing core plate (2), the first sound-absorbing micropores (1) gradually consume energy in the process of internal reflection, refraction and friction, and absorb the sound within a certain frequency range. The sound within the remaining frequency range is reflected, refracted and rubbed by the second sound-absorbing micropores (7) on the second sound-absorbing core plate (3), thereby consuming energy and achieving double consumption, and achieving a good sound-absorbing effect. Example 2

[0049] The difference between this embodiment and embodiment 1 is that: the first sound-absorbing core board (2) and the second sound-absorbing core board (3) are provided with sound-absorbing cotton (9), one side of the sound-absorbing cotton (9) is connected to the first sound-absorbing core board (2), and the other side of the sound-absorbing cotton (9) is connected to the second sound-absorbing core board (3), and the surface of the sound-absorbing cotton (9) is rough; when in use, the large number of microporous structures on the sound-absorbing cotton (9) can buffer and absorb sound waves, reduce the energy of sound waves, and the rough surface can increase the contact area with sound waves, and cooperate with the first sound-absorbing micropores (1) and the second sound-absorbing micropores (7) to improve the sound absorption effect; Example 3

[0050] The difference between this embodiment and embodiment 1 is that: a plurality of composite sound-absorbing micropores (10) are formed on the first sound-absorbing core board (2); the plurality of composite sound-absorbing micropores (10) and the plurality of first sound-absorbing micropores (1) are arranged in a staggered manner; the aperture of the composite sound-absorbing micropores (10) is smaller than the aperture of the first sound-absorbing micropores (1); and the aperture of the composite sound-absorbing micropores (10) is larger than the aperture of the second sound-absorbing micropores (7); when in use, the micropores of different apertures on the first sound-absorbing core board (2) are arranged in a mixed manner, and in combination with the second sound-absorbing micropores (7), sound within a wider frequency range can be absorbed, resulting in a better sound absorption effect;

[0051] The second sound-absorbing core board (3) is designed to be formed by splicing a plurality of rectangular core boards, and second sound-absorbing micropores (7) of different shapes, arrangements and densities can be opened on different rectangular core boards, and can be used in combination according to different sound frequency characteristics in different places to improve the sound absorption effect;

[0052] The wall of the second sound-absorbing micropore (7) is rough. The design of the rough wall of the first sound-absorbing micropore (1) can increase the complexity of the pores, so that when the sound waves pass through the holes of the second sound-absorbing micropore (7), they will generate friction on the wall of the pore due to the greater viscosity, thereby consuming sound energy and improving the sound absorption effect;

[0053] The design of staggered arrangement of the plurality of first sound-absorbing micropores (1) and the plurality of second sound-absorbing micropores (7) can form different channels to absorb sounds of multiple frequency bands, and compared with a single aperture, can increase the propagation path of sound waves, thereby achieving a better sound absorption effect;

[0054] The aperture of the first sound-absorbing micropore (1) is designed to gradually increase from one end to the other end. The gradual hole channel can make the reflection of sound more dispersed, and the gradual hole channel can absorb sound waves in different frequency ranges, thereby improving the sound absorption effect;

[0055] The design of the connecting lock (8) cooperating with the connecting groove (6) to lock the first sound-absorbing core board (2) in the sound-absorbing frame (5) enables the first sound-absorbing core board (2) to press the second sound-absorbing core board (3) and the sound-absorbing felt (4) in the sound-absorbing frame (5) to form an integral sound-absorbing structure, which is convenient for installation and transportation;

[0056] The purpose of expanding the sound absorption frequency range and improving the sound absorption effect is achieved by setting a double-layer sound-absorbing core board with different shapes, sizes, densities and arrangements of the sound-absorbing micropores on the double-layer sound-absorbing core board.

[0057] It should be noted that, unless otherwise clearly specified and limited, the terms "placed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection method such as a folding connection, a rivet connection, a pin connection, a bonding connection and a welding connection, or a detachable connection method such as a threaded connection, a snap connection and a hinge connection, or an integral connection, or an electrical connection, or a direct connection, or an indirect connection through an intermediate medium, or the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] It should be further pointed out that, when describing the above specific embodiments, for the sake of simplicity and clarity, only the differences between the above specific embodiments are described, but those skilled in the art should know that the above specific embodiments themselves are also independent technical solutions.

Claims

1. A multi-layer composite sound-absorbing board, characterized in that: The first sound-absorbing micropore, the first sound-absorbing core board, the second sound-absorbing core board, the sound-absorbing thin felt, the sound-absorbing frame, the connecting groove, the second sound-absorbing micropore and the connecting lock are composed, the sound-absorbing thin felt is placed in the sound-absorbing frame, the connecting groove is opened on the side of the sound-absorbing frame, the second sound-absorbing core board is placed in the sound-absorbing frame and is located on the sound-absorbing thin felt, the second sound-absorbing micropore is opened on the second sound-absorbing core board, the first sound-absorbing core board is placed in the sound-absorbing frame and is located on the second sound-absorbing core board, the first sound-absorbing micropore is opened on the first sound-absorbing core board, and the connecting lock corresponding to the connecting groove is arranged on the side of the first sound-absorbing core board.

2. A multi-layer composite sound-absorbing panel according to claim 1, characterized in that The first sound-absorbing core board and the second sound-absorbing core board are provided with sound-absorbing cotton, one side of the sound-absorbing cotton is connected to the first sound-absorbing core board, and the other side of the sound-absorbing cotton is connected to the second sound-absorbing core board, and the surface of the sound-absorbing cotton is rough.

3. The multi-layer composite sound-absorbing panel according to claim 1, characterized in that The first sound-absorbing core plate is provided with a plurality of composite sound-absorbing micropores, the plurality of composite sound-absorbing micropores and the plurality of first sound-absorbing micropores are arranged alternately, the aperture of the composite sound-absorbing micropores is smaller than the aperture of the first sound-absorbing micropores, and the aperture of the composite sound-absorbing micropores is larger than the aperture of the second sound-absorbing micropores.

4. The multi-layer composite sound-absorbing panel according to claim 1, characterized in that The sound-absorbing frame is a rectangular structure, the sound-absorbing felt is tightly connected to the bottom plate of the sound-absorbing frame, and the number of the connecting grooves is greater than one.

5. The multi-layer composite sound-absorbing panel according to claim 1, characterized in that The second sound-absorbing core board is formed by splicing a plurality of rectangular core boards, the second sound-absorbing micropores are multiple, and the hole walls of the second sound-absorbing micropores are rough.

6. A multi-layer composite sound-absorbing board according to claim 1 or 5, characterized in that A plurality of the second sound-absorbing micropores are arranged in a matrix or honeycomb shape on the second sound-absorbing core board, and the shape of the second sound-absorbing micropores is one or a combination of circular, elliptical, rectangular, diamond, pentagonal, hexagonal, octagonal, and cross shapes.

7. The multi-layer composite sound-absorbing board according to claim 1, characterized in that The connecting lock is clamped in the connecting groove to lock the first sound-absorbing core board in the sound-absorbing frame. At the same time, the first sound-absorbing core board presses the second sound-absorbing core board and the sound-absorbing felt in the sound-absorbing frame. The surface of the first sound-absorbing core board is provided with a decorative veneer.

8. The multi-layer composite sound-absorbing panel according to claim 1, characterized in that There are a plurality of the first sound-absorbing micro-holes, and the plurality of the first sound-absorbing micro-holes and the plurality of the second sound-absorbing micro-holes are arranged alternately.

9. The multi-layer composite sound-absorbing panel according to claim 1, characterized in that The aperture of the first sound absorbing micropore is larger than that of the second sound absorbing micropore, the aperture of the first sound absorbing micropore gradually increases from one end to the other end, and the pore wall of the first sound absorbing micropore is rough.

10. The multi-layer composite sound-absorbing board according to claim 9, characterized in that The plurality of first sound-absorbing micropores are arranged in a matrix or honeycomb shape on the first sound-absorbing core board, the shape of the first sound-absorbing micropores is one or a combination of circular, elliptical, rectangular, diamond, pentagonal, hexagonal, octagonal, and cross shapes, and the shape of the first sound-absorbing micropores is different from that of the second sound-absorbing micropores.

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