CN219175579U

CN219175579U - Acoustic metamaterial structure and sound insulation curtain wall

Info

Publication number: CN219175579U
Application number: CN202223488023.0U
Authority: CN
Inventors: 刘贺平; 赵永吉; 严竹芳; 胡永政
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-06-13
Anticipated expiration: 2032-12-22

Abstract

The utility model discloses an acoustic metamaterial structure and a sound insulation curtain wall, wherein the acoustic metamaterial structure comprises the following components: a cover plate; the cover plate is covered on the frame, and a plurality of sound cavities are arranged in the frame; the bottom plates are adjustably arranged in the sound cavities and are in one-to-one close fit. The volume of the acoustic cavity can be changed by adjusting the installation position of the bottom plate in the acoustic cavity, so that the installation position of the bottom plate in the acoustic cavity is required to be adjusted according to the characteristic frequency of noise of the bottom plate under different demand scenes, acoustic super-structure materials with different sound absorption effects can be combined, the redevelopment of the die is avoided, the development cost is reduced, in addition, the structural design is concise and flexible, the processing difficulty of each part is low, and the acoustic super-structure material is suitable for mass and automatic production.

Description

Acoustic metamaterial structure and sound insulation curtain wall

Technical Field

The utility model relates to the technical field of acoustics, in particular to an acoustic metamaterial structure and a sound insulation curtain wall.

Background

The acoustic super-structure material is composed of a plurality of acoustic cavities with the same or different volumes and is used for absorbing sound and reducing noise.

In the related art, a top plate with an opening is usually connected with a bottom plate with an acoustic cavity to form a final product, and the acoustic principle is that the external space of a material is connected with a grid on the bottom plate through a small hole on the top plate, when an acoustic wave is incident, a severe resonance effect is generated between the air of the neck and the air of the cavity on the resonance frequency, so that the energy of the acoustic wave is lost, and the purpose of sound absorption is achieved. The product is fixed because of its sound absorption effect, therefore the sound cavity volume is also certain, and is only obvious to certain frequency section effect, under different demand scenes, need to develop different sound cavity volumes according to its characteristic frequency of noise to, injection molding die sinking and the cost of production are all very high, are fit for small batch verification usefulness.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides an acoustic metamaterial structure, the installation position of the bottom plate in the acoustic cavity can be adjusted to change the volume of the acoustic cavity, acoustic metamaterial with different sound absorption effects can be combined, the mold is prevented from being redeveloped, and the development cost is reduced.

An acoustic metamaterial structure according to an embodiment of the first aspect of the present utility model, comprises: a cover plate; the cover plate is covered on the frame, and a plurality of sound cavities are arranged in the frame; the bottom plates are adjustably arranged in the sound cavities and are in one-to-one close fit.

According to the acoustic metamaterial structure provided by the embodiment of the utility model, the volume of the acoustic cavity can be changed by adjusting the installation position of the bottom plate in the acoustic cavity, so that the installation position of the bottom plate in the acoustic cavity is required to be adjusted according to the characteristic frequency of noise of the bottom plate under different requirements, acoustic metamaterial with different sound absorption effects can be combined, the redevelopment of a mould is avoided, the development cost is reduced, the structural design is simple and flexible, the processing difficulty of each part is low, and the acoustic metamaterial structure is suitable for mass and automatic production.

According to some embodiments of the utility model, the base plate comprises: the sound cavity comprises a bottom plate body, wherein a frame is arranged at the edge of the bottom plate body, and the bottom plate body is arranged in the sound cavity and is tightly matched with the inner wall of the sound cavity.

According to some embodiments of the utility model, the base plate further comprises: the sealing piece is arranged on the frame in a surrounding mode, and the sealing piece is in sealing fit with the inner wall of the acoustic cavity.

According to some embodiments of the utility model, the seal is integrally injection molded with the bezel.

According to some embodiments of the utility model, the frame comprises: the sound cavity comprises a frame main body and a plurality of partition boards, wherein the partition boards are distributed in the frame main body in a staggered mode to form a plurality of sound cavities.

According to some embodiments of the utility model, the number of the frames is at least two, and the edges of the frames are provided with connecting grooves, and the notches of the connecting grooves face to one side away from the acoustic cavity; and, the acoustic metamaterial structure further comprises: the connecting pieces are inserted into the two oppositely arranged connecting grooves so as to connect the two adjacent frames.

According to some embodiments of the utility model, the connector comprises: the first connecting portion and the second connecting portion are connected with each other, and the first connecting portion and the second connecting portion are respectively matched in the connecting grooves of two adjacent frames.

According to some embodiments of the utility model, the cover plate is provided with a plurality of sound inlet holes, and the sound inlet holes are arranged in one-to-one correspondence with the sound cavities.

According to some embodiments of the utility model, the shape of the acoustic cavity may be any of triangle, regular polygon, and cylinder.

According to some embodiments of the utility model, at least two of the base plates differ in height within the acoustic cavity.

According to some embodiments of the utility model, a groove is formed in one side of the bottom plate, which is away from the cover plate, and the groove is used for being matched with a boss of the positioning tool in a positioning mode.

An acoustic curtain wall according to an embodiment of the second aspect of the present utility model includes: the acoustic metamaterial structure.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a front effect diagram of an acoustic metamaterial structure in accordance with an embodiment of the present utility model;

FIG. 2 is a backside effects diagram of an acoustic metamaterial structure in accordance with an embodiment of the present utility model;

FIG. 3 is a front view of a frame of an embodiment of the present utility model;

FIG. 4 is a perspective view of a frame of an embodiment of the present utility model;

FIG. 5 is a front view of a cover plate of an embodiment of the present utility model;

FIG. 6 is a perspective view of a cover plate of an embodiment of the present utility model;

FIG. 7 is a front view of a base plate of an embodiment of the present utility model;

FIG. 8 is a perspective view of a base plate of an embodiment of the present utility model;

FIG. 9 is a perspective view of a seal on a base plate of an embodiment of the present utility model;

FIG. 10 is a front view of an acoustic metamaterial structure without a cover plate in accordance with an embodiment of the present utility model;

FIG. 11 is a perspective view of an acoustic metamaterial structure without a cover plate according to an embodiment of the present utility model

FIG. 12 is a perspective view of a connector according to an embodiment of the present utility model;

FIG. 13 is a schematic structural view of a positioning tool according to an embodiment of the present utility model;

fig. 14 is an installation schematic diagram of a positioning tool and a base plate according to an embodiment of the present utility model.

Reference numerals:

100. an acoustic metamaterial structure;

1. a cover plate; 11. a sound inlet hole;

2. a frame; 21. an acoustic cavity; 22. a frame body; 23. a partition plate; 24. a connecting groove; 25. a connecting piece; 251. a first connection portion; 252. a second connecting portion;

3. a bottom plate; 31. a base plate main body; 32. a frame; 33. a seal;

200. positioning a tool; 210. a boss.

Detailed Description

Embodiments of the present utility model will be described in detail below, by way of example with reference to the accompanying drawings.

An acoustic metamaterial structure 100 according to an embodiment of the present utility model is described below with reference to fig. 1-14.

As shown in fig. 1-8, an acoustic metamaterial structure 100 comprises: a cover plate 1, a frame 2 and a plurality of bottom plates 3.

The cover plate 1 is arranged on the frame 2 in a covering manner, a plurality of sound cavities 21 are arranged in the frame 2, and a plurality of bottom plates 3 are adjustably arranged in the plurality of sound cavities 21 and are in close fit in a one-to-one correspondence manner.

That is, a plurality of through acoustic cavities 21 are formed in the frame 2, a cover plate 1 is provided on the upper side of the frame 2, and the lower side of the frame 2 is closely disposed in the plurality of acoustic cavities 21 through a plurality of bottom plates 3, thereby forming an acoustic metamaterial structure 100 having a sound absorbing effect.

The bottom plate 3 is adjustable, through adjusting the mounted position of bottom plate 3 in the acoustic cavity 21, can change the volume of acoustic cavity 21, consequently, under different demand scenes, need according to its characteristic frequency of noise adjust the mounted position of bottom plate 3 in acoustic cavity 21 can to can make up the acoustic super-structure material of different sound absorption effects, avoided the redevelopment mould, reduced development cost, and structural design is succinct, nimble, each part processing degree of difficulty is low, is fit for batch, automated production.

Compared with the existing acoustic product, the volume of the acoustic cavity 21 is constant, the effect is obvious only for a certain frequency segment, and different structures are required to be developed according to the characteristic frequency of noise of different requirements. According to the acoustic metamaterial structure 100, the installation position of the bottom plate 3 in the acoustic cavity 21 can be adjusted, so that the volume of the acoustic cavity 21 is changed, and acoustic metamaterial with different sound absorption effects can be combined.

The outline structure of the frame 2 may be a rectangular structure, so that a plurality of frames 2 can be conveniently combined to form a larger acoustic metamaterial structure 100, and the sound absorption effect is stronger. Wherein the frame 2 may be extrusion molded.

In the embodiment of the present utility model, the side length of the frame 2 may be 50mm to 300mm and the height may be 20mm to 300 mm. Of course, other dimensions may be formulated according to different design requirements.

Therefore, the volume of the acoustic cavity 21 can be changed by adjusting the installation position of the bottom plate 3 in the acoustic cavity 21, so that the installation position of the bottom plate 3 in the acoustic cavity 21 is required to be adjusted according to the characteristic frequency of noise of the bottom plate under different demand scenes, acoustic super-structural materials with different sound absorption effects can be combined, the redevelopment of a die is avoided, the development cost is reduced, in addition, the structural design is simple and flexible, the processing difficulty of each part is low, and the ultrasonic super-structural material is suitable for mass and automatic production.

As shown in fig. 7 and 8, the base plate 3 includes: the sound cavity comprises a bottom plate main body 31 and a frame 32, wherein the frame 32 is arranged at the edge of the bottom plate main body 31, the bottom plate main body 31 is arranged in the sound cavity 21, and the frame 32 is tightly matched with the inner wall of the sound cavity 21. Thus, the edge of the bottom plate main body 31 is surrounded with the frame 32, after the bottom plate 3 is installed in the acoustic cavity 21, the bottom plate main body 31 is blocked in the acoustic cavity 21, the frame 32 is tightly matched with the inner wall of the acoustic cavity 21, so that the bottom plate 3 is tightly matched in the acoustic cavity 21, and the influence of acoustic performance caused by the volume change of the acoustic cavity 21 is prevented. Wherein the bottom plate 3 may be injection molded.

Illustratively, the bottom plate 3 may have a square structure with rounded corners, and may have a total thickness of 3mm to 10mm, which is adapted to the shape of the acoustic cavity 21.

As shown in connection with fig. 9, the base plate 3 further includes: the sealing element 33, the sealing element 33 encloses on the frame 32, the sealing element 33 and the inner wall of the acoustic cavity 21 are in sealing fit. In this way, the sealing member 33 is provided around the frame 32, and after the chassis 3 is mounted in the acoustic chamber 21, the acoustic chamber 21 can be sealed by the sealing member 33, and the friction between the frame 32 and the side wall of the frame 2 can be increased, so that the mounting stability of the chassis 3 can be further improved.

In the embodiment of the utility model, the sealing element 33 can be a rubber sealing ring, and the diameter can be 0.5 mm-2 mm, so that the friction force between the rubber sealing ring and the side wall of the frame 2 is effectively ensured, and the influence of acoustic performance caused by the volume change of the acoustic cavity 21 is prevented.

In some embodiments, the seal 33 is integrally injection molded with the bezel 32. Specifically, the base plate 3 and the sealing member 33 may be integrally formed by a two-shot molding process.

Alternatively, the bottom plate 3 may be formed in a flat plate structure with a seal 33 around the bottom plate.

As shown in fig. 3 and 4, the frame 2 includes: the sound chamber comprises a frame body 22 and a plurality of partition plates 23, wherein the partition plates 23 are distributed in the frame body 22 in a staggered manner to form a plurality of sound chambers 21. In the present embodiment, the frame body 22 may have a rectangular structure, and a plurality of partitions 23 are disposed in a distributed manner in the lateral and longitudinal directions inside the frame body 22 to form a plurality of square-shaped acoustic cavities 21. Of course, the structure of the acoustic cavity 21 is not limited to the square structure, but may be other structures.

In some embodiments, the shape of the acoustic cavity 21 may be any of triangular, regular polygonal, cylindrical.

If the shape of the acoustic chamber 21 is changed to a cylindrical shape, the bottom plate 3 is correspondingly changed to a cylindrical shape, however, the acoustic chamber 21 may be designed to be triangular, rectangular, regular polygonal or a combination thereof. The length and width dimensions of the acoustic cavity 21 can be made as a series of products.

Specifically, the cover plate 1, the bottom plate 3 and the frame 2 can be made of super-structural materials, so that the sound absorption effect is good. In addition, the structure of the frame 2 can be changed into aluminum, and extrusion molding can be adopted. The material of the bottom plate 3 can be changed into aluminum or other metals, and the bottom plate can be used for scenes with high fire-proof level requirements.

Moreover, the thickness and aperture of the cover plate 1 also affect the sound absorption effect, and the cover plate 1 with a proper size can be selected according to the acoustic design so as to meet the required acoustic performance.

As shown in fig. 10-12, the number of the frames 2 is at least two, the edges of the frames 2 are provided with connecting grooves 24, and the notches of the connecting grooves 24 face to the side facing away from the acoustic cavity 21; and, the acoustic metamaterial structure 100 further comprises: the connecting pieces 25 are disposed opposite to the connecting grooves 24 of the adjacent two frames 2, and the connecting pieces 25 are inserted into the two oppositely disposed connecting grooves 24 to connect the adjacent two frames 2.

In this way, the edge of the frame 2 is provided with the connecting groove 24, the notch of which is open towards the side facing away from the acoustic cavity 21, and when the two frames 2 are connected, the connecting grooves 24 of the two frames 2 are oppositely arranged, and thus, the two frames 2 can be assembled together by inserting the connecting piece 25 into the two oppositely arranged connecting grooves 24, so that the acoustic metamaterial structure 100 is convenient to align in the construction process, and the structural strength can be enhanced.

Wherein the connecting piece 25 can be formed by extrusion and can be opened on the same extrusion die as the frame 2. The extrusion molding has the advantages of low die cost, continuous production, stable size and low material cost.

As shown in fig. 12, the connector 25 includes: the first and

second connection parts

251 and 252 are connected to each other, and the first and

second connection parts

251 and 252 are fitted in the connection grooves 24 of the adjacent two frames 2, respectively. In this way, the first connecting portion 251 and the second connecting portion 252 are connected and respectively inserted into the connecting grooves 24 of the adjacent two frames 2 correspondingly.

In the embodiment of the present utility model, the connecting groove 24 is designed as a circular groove, and correspondingly, the first connecting portion 251 and the second connecting portion 252 are both circular shaft bodies, so as to form an 8-shaped connecting piece 25, and after the two frames 2 are assembled together, the connecting piece 25 is inserted into the two connecting grooves 24 which are oppositely arranged.

As shown in fig. 5 and 6, the cover plate 1 is provided with a plurality of sound inlet holes 11, and the sound inlet holes 11 are arranged in one-to-one correspondence with the sound cavities 21. In this way, the cover plate 1 is provided with the sound inlet hole 11, the external space of the acoustic metamaterial structure 100 is connected with the sound cavity 21 in the frame 2 through the sound inlet hole 11 in the cover plate 1, when sound waves are incident, a severe resonance effect is generated between the air at the sound inlet hole 11 and the air in the sound cavity 21 on the resonance frequency, so that the energy of sound is lost, and the purpose of sound absorption is achieved.

The cover plate 1 can be connected with the frame 2 by means of bonding or ultrasonic welding and processed by CNC technology.

In some embodiments, at least two bottom plates 3 differ in height within the acoustic cavity 21. Thus, the plurality of bottom plates 3 are sequentially installed in the plurality of acoustic cavities 21, and the installation heights of at least two bottom plates 3 in the acoustic cavities 21 are different, and different sound absorption effects can be combined due to the different installation heights of the bottom plates 3 in the acoustic cavities 21.

In some embodiments, the side of the bottom plate 3 facing away from the cover plate 1 is provided with a groove for positioning engagement with the boss 210 of the positioning fixture 200. In this way, a groove is formed on one side of the bottom plate 3 away from the cover plate 1, so that the bottom plate 3 is conveniently positioned on the boss 210, and the weight of materials is reduced.

As shown in fig. 13 and 14, the positioning tool 200 is provided with a plurality of bosses 210 for positioning a plurality of bottom plates 3, the bottom plates 3 are first mounted on the bosses 210 of the positioning tool 200, and then the combined frame 2 and cover plate 1 are pressed downward, so as to obtain a finished product. Alternatively, the base plate 3 may be sucked by a robot and directly mounted in the frame 2.

The positioning tool 200 is made of bakelite, acryl, aluminum or other metal, and the height dimension of the boss 210 is determined according to the depth of the acoustic cavity 21. The positioning tool 200 is simple in structure, convenient to manufacture, low in cost, suitable for mass production and manufacture, and capable of effectively saving product cost and shortening development period, compared with 3D printing integrated forming, injection molding, viscose/ultrasonic welding, CNC (computer numerical control) of plates, viscose/ultrasonic welding and the like.

An acoustic curtain wall according to an embodiment of the second aspect of the present utility model includes: an acoustic metamaterial structure 100. The plurality of acoustic metamaterial structures 100 are spliced and combined to form the required sound insulation curtain wall, and the sound insulation curtain wall can be suitable for different scenes.

Therefore, by adjusting the installation position of the bottom plate 3 in the acoustic cavity 21, the volume of the acoustic cavity 21 can be changed, and under different demand scenes, the installation position of the bottom plate 3 in the acoustic cavity 21 needs to be adjusted according to the characteristic frequency of noise, so that the acoustic metamaterial structure 100 with different sound absorption effects can be combined, the redevelopment of the mould is avoided, the development cost is reduced, in addition, the structural design is simple and flexible, the processing difficulty of each part is low, and the acoustic metamaterial structure is suitable for mass and automatic production.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. An acoustic metamaterial structure (100), comprising:

a cover plate (1);

the frame (2), the cover plate (1) is covered on the frame (2), and a plurality of acoustic cavities (21) are arranged in the frame (2);

the base plates (3) are adjustably arranged in the sound cavities (21) and are in close fit in a one-to-one correspondence.

2. The acoustic metamaterial structure (100) according to claim 1, wherein the base plate (3) comprises: the sound cavity comprises a bottom plate main body (31) and a frame (32), wherein the frame (32) is arranged on the periphery of the bottom plate main body (31), and the bottom plate main body (31) is arranged in the sound cavity (21) and the frame (32) is tightly matched with the inner wall of the sound cavity (21).

3. The acoustic metamaterial structure (100) according to claim 2, wherein the base plate (3) further comprises: the sealing piece (33), the sealing piece (33) encloses and establishes on frame (32), sealing piece (33) with the inner wall sealing cooperation of acoustic cavity (21).

4. An acoustic metamaterial structure (100) according to claim 3, wherein the seal (33) is integrally injection moulded with the rim (32).

5. The acoustic metamaterial structure (100) according to claim 1, wherein the frame (2) comprises: a frame main body (22) and a plurality of partition boards (23), wherein the partition boards (23) are distributed in the frame main body (22) in a staggered way so as to form a plurality of sound cavities (21).

6. The acoustic metamaterial structure (100) according to claim 1, wherein the number of frames (2) is at least two, the edges of the frames (2) are provided with connecting grooves (24), and the notches of the connecting grooves (24) face to the side facing away from the acoustic cavity (21); the method comprises the steps of,

the acoustic metamaterial structure (100) further comprises: and the connecting pieces (25) are oppositely arranged in the connecting grooves (24) of two adjacent frames (2), and the connecting pieces (25) are inserted into the two oppositely arranged connecting grooves (24) so as to connect the two adjacent frames (2).

7. The acoustic metamaterial structure (100) according to claim 6, wherein the connector (25) comprises: -a first connection portion (251) and a second connection portion (252), said first connection portion (251) and said second connection portion (252) being connected to each other, said first connection portion (251) and said second connection portion (252) being respectively fitted in said connection grooves (24) of two adjacent frames (2).

8. The acoustic metamaterial structure (100) according to claim 1, wherein a plurality of sound inlet holes (11) are formed in the cover plate (1), and the sound inlet holes (11) are arranged in one-to-one correspondence with the sound cavities (21).

9. The acoustic metamaterial structure (100) according to claim 1, wherein the shape of the acoustic cavity (21) is any one of triangular, regular polygonal, cylindrical.

10. The acoustic metamaterial structure (100) according to claim 1, wherein at least two of the bottom plates (3) differ in height within the acoustic cavity (21).

11. The acoustic metamaterial structure (100) according to claim 1, wherein a side of the bottom plate (3) facing away from the cover plate (1) is provided with a groove for positioning cooperation with a boss of a positioning tool (200).

12. A sound insulation curtain wall, comprising: the acoustic metamaterial structure (100) according to any one of claims 1 to 11.