Film acoustic metamaterial sound insulation board and sound insulation structure

Abstract

The utility model discloses a thin film acoustic metamaterial sound insulation board and a sound insulation structure, which belong to the technical field of thin film acoustic metamaterials, and comprise a thin film, a frame and a mass block, the thin film is positioned on the inner side of the frame, and the mass block is arranged in the middle of the thin film; the damping particles are filled in the frame, and the sound insulation structure is formed by a plurality of sound insulation plate arrays, so that the sound insulation performance is remarkably improved, and noise transmission is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to thin film acoustic metamaterial technical field especially relates to a thin film acoustic metamaterial sound insulation board and sound insulation structure. BACKGROUND

[0002] Thin film acoustic metamaterials, as a new type of sound-absorbing and sound-insulating material, have been widely used in various fields such as construction, transportation, and electronics. These materials, through specific structural design, can effectively absorb and isolate sound of different frequency ranges, thereby improving the comfort and safety of the environment. With the acceleration of urbanization and the development of technology, there is an increasing demand for efficient, lightweight, and easy-to-install acoustic materials.

[0003] In existing technologies, to achieve good sound insulation effect, the commonly used methods include but are not limited to adding porous or fibrous materials inside traditional boards to enhance sound-absorbing performance; using composite materials to combine metal sheets, plastic films, etc. together to form sound-insulating boards with multiple functions; and optimizing sound propagation paths by changing the thickness and density of materials to reduce noise transmission.

[0004] However, the above methods, although they can improve the sound insulation effect to some extent, still have shortcomings in actual application. In particular, when it is necessary to fill damping particles in an existing frame, the traditional filling method often fails to ensure uniform distribution of the particles and is inconvenient for subsequent secondary processing. This not only affects the overall performance of the product, but also limits the flexibility and operability of the production process. SUMMARY

[0005] The utility model provides a kind of thin film acoustic metamaterial sound insulation board and sound insulation structure, the effect of significantly improving sound insulation performance, effectively reduce noise transmission.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A kind of thin film acoustic metamaterial sound insulation board, including film, frame and mass block, the film is located in the inside of the frame, the middle part of the film is provided with the mass block;The frame is filled with damping particles.

[0008] The preferred technical solution of the utility model is that a filling hole is formed in the frame for filling the damping particles, and a sealing member is arranged outside the filling port.

[0009] The preferred technical solution of the utility model is that a filling bag is arranged in the frame, a filling cavity is arranged in the filling bag, the filling hole is communicated with the filling cavity, and the damping particles are filled in the filling cavity.

[0010] The utility model discloses a preferred technical scheme is in the frame is provided with a plurality of for separating the damping particle baffle.

[0011] The utility model discloses a preferred technical scheme is on the frame is provided with detachable cover, the cover is covered in the top of filling hole.

[0012] The utility model discloses a preferred technical scheme is in the damping particle filling degree 80%-90% between.

[0013] The utility model discloses a preferred technical scheme is in the damping particle shape setting is globular, and the particle size of damping particle is not more than 1mm.

[0014] The utility model discloses a preferred technical scheme is in the film layer is polyurethane film or polyethylene film.

[0015] The utility model discloses a preferred technical scheme is in each the middle part of film in the square matrix is provided with mass block.

[0016] A kind of thin film acoustic metamaterial sound insulation structure is formed by the thin film acoustic metamaterial sound insulation board array of any one of the above.

[0017] The utility model discloses a beneficial effect is:

[0018] (1) frame is filled with damping particle, can significantly improve the sound absorption and sound insulation performance of thin film acoustic metamaterial sound insulation board, effectively reduce the transmission of sound;

[0019] (2) damping particle filling rate is between 80-90%, so that damping particle uniform distribution makes the sound insulation effect of product in different area more consistent, improves the overall performance of product;

[0020] (3) the design of filling hole facilitates later secondary processing, conveniently supplements or adjusts the number of damping particle in filling bag, increases the flexibility and convenience of production. ACCURACY OF DRAWINGS

[0021] Figure 1 It is the overall structure schematic view of thin film acoustic metamaterial sound insulation board embodiment 1 provided in the embodiment of the utility model;

[0022] Figure 2 It is the overall structure side view of thin film acoustic metamaterial sound insulation board embodiment 1 provided in the embodiment of the utility model;

[0023] Figure 3 It is Figure 2 The schematic diagram of embodiment 2 along the AA line section;

[0024] Figure 4It is the overall structure front view of the thin film acoustic metamaterial sound insulation board embodiment 1 provided in the specific embodiment of the utility model;

[0025] Figure 5 It is Figure 4 The schematic diagram of embodiment 1 along the BB line section;

[0026] Figure 6 It is Figure 4 The schematic diagram of embodiment 2 along the BB line section;

[0027] Figure 7 It is the overall structure schematic diagram of the thin film acoustic metamaterial sound insulation board embodiment 3 provided in the specific embodiment of the utility model;

[0028] Figure 8 It is the overall structure schematic diagram of the thin film acoustic metamaterial sound insulation board embodiment 4 provided in the specific embodiment of the utility model;

[0029] In the figure:

[0030] 1, film; 2, frame; 21, filling hole; 22, baffle; 23, cover plate; 3, mass block; 4, damping particle; 5, filling bag; 6, filling cavity; 7, sealing element. Specific embodiment

[0031] The technical scheme of the utility model will be further illustrated by specific embodiments in combination with the drawings.

[0032] As Figure 1 Indicated, the utility model provides a kind of thin film acoustic metamaterial sound insulation board, including film, frame and mass block, film is located inside frame, and mass block is provided in the middle part of film;Frame is filled with damping particle, reaches the effect of effectively improving middle frequency band noise absorption.

[0033] Embodiment 1

[0034] As Figures 1-2 Indicated, frame 2 can be made of aluminum alloy, with higher strength and rigidity, can effectively support the entire sound insulation board structure.Frame 2 is rectangular frame shape, to increase overall stability.

[0035] Frame 2 is filled with damping particle 4, and damping particle 4 is mainly used to absorb the noise of middle frequency band.

[0036] The shape of damping particle 4 is spherical, and the particle size is not more than 1 millimeter, so that it can be ensured that filling hole is not blocked during filling process, and damping particle 4 can be better dispersed in the whole frame inside.Small size and smooth surface of spherical particle make it not easy to accumulate during filling process, to ensure the uniform distribution of damping particle 4 in frame.

[0037] To further improve the performance of the damping particles 4, a thin layer of silicone oil or graphite powder can be applied to their surface to increase lubricity and shock-absorbing effect.

[0038] The filling degree of the damping particles 4 is controlled between 80%-90%, which ensures sufficient damping effect and avoids the problem of structural instability caused by overfilling.

[0039] The film 1 can be made of two different materials: polyurethane film or polyethylene film. Both materials have good flexibility and weather resistance, suitable for use in various environmental conditions. Among them, the polyurethane film has higher wear resistance and tear resistance, suitable for high-strength application scenarios; while the polyethylene film is more economical and practical, suitable for general indoor environments.

[0040] The mass 3 is made of high-density lead alloy.

[0041] To prevent the damping particles 4 from leaking during use, a sealing element 7 such as a rubber plug or threaded cap is provided outside the filling hole.

[0042] By introducing the frame 2, mass 3 and damping particles 4 into the acoustic metamaterial soundproof panel of the film 1, a multi-layer composite structure design is achieved. This structure not only has excellent sound absorption and sound insulation performance, but also can achieve the best effect in different frequency ranges. By filling spherical damping particles in the frame and distributing them evenly to each partition area, the absorption capacity of mid-frequency noise is greatly improved. At the same time, the reasonable filling degree (80%-90%) ensures the stability and durability of the structure. The filling hole and sealing element design on the frame makes the filling process of the damping particles 4 more convenient and facilitates the secondary processing later. This design not only simplifies the manufacturing process, but also improves the production efficiency.

[0043] Example 2

[0044] As shown in Figure 3 , 6 , the frame 2 is provided with several horizontal and vertical partitions 22, and the damping particles 4 are filled on both sides of the partitions 22. The partitions 22 restrict the damping particles 4 to fixed areas, preventing them from gathering or shifting under vibration or impact, ensuring that the damping particles 4 are always evenly distributed. The damping particles 4 in each partition move within a local range, making the energy absorption and dissipation process more predictable and improving the consistency of damping efficiency.

[0045] Example 3

[0046] As shown in Figure 4 , the difference between this embodiment and the above-mentioned embodiments is that a filling bag 5 is provided in the frame, a filling cavity 6 is provided in the filling bag 5, the filling hole 21 communicates with the filling cavity 6, and the damping particles 4 are filled in the filling cavity 6.

[0047] The filling cavity volume inside the filling bag 5 can be adjusted according to actual needs to adapt to frames 2 of different thicknesses. During the filling process, the damping particles 4 can be accurately delivered to the designated position through a pressure pump or other filling equipment to ensure the uniformity and consistency of the filling.

[0048] By setting the filling bag 5 and the filling hole 21, accurate filling of the damping particles 4 is achieved. This method not only ensures the uniform distribution of the damping particles 4 in the frame 2, but also allows flexible adjustment of the filling amount according to the requirements of different application scenarios. The presence of the filling bag 5 not only facilitates the filling of the damping particles 4, but also to some extent enhances the overall rigidity of the frame 2 and improves the compression resistance and service life of the product.

[0049] Embodiment 4

[0050] As shown in Figure 7 The frame 2 is provided with a detachable cover plate 23, which facilitates filling of the damping particles 4 in the partition plate 22. The cover plate 23 can be installed on the filling hole 21 by various installation methods, such as clamping and buckling, sliding connection, or rotating installation on one side of the filling hole 21.

[0051] Embodiment 5

[0052] As shown in Figure 8 This embodiment is an array arrangement of the thin film acoustic metamaterial sound insulation plate mentioned in any one of the above embodiments in the XY direction.

[0053] The utility model is described through preferred embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. The utility model is not limited by the specific embodiments disclosed herein, and other embodiments falling within the scope of the claims of the present application all belong to the scope of protection of the utility model.

Claims

1. A thin-film acoustic metamaterial sound insulation panel, characterized in that: It includes a film (1), a frame (2) and a mass block (3), wherein the film (1) is located inside the frame (2) and the mass block (3) is disposed in the middle of the film (1); The frame (2) is filled with damping particles (4).

2. The thin-film acoustic metamaterial sound insulation panel according to claim 1, characterized in that: The frame (2) has a filling hole (21) for filling the damping particles (4), and a sealing element (7) is provided on the outside of the filling hole.

3. The thin-film acoustic metamaterial sound insulation panel according to claim 2, characterized in that: A filling bag (5) is provided inside the frame (2), and a filling cavity (6) is provided inside the filling bag (5). The filling hole (21) communicates with the filling cavity (6), and the damping particles (4) are filled in the filling cavity (6).

4. The thin-film acoustic metamaterial sound insulation panel according to claim 3, characterized in that: The frame (2) is provided with a plurality of partitions (22) for separating the damping particles (4).

5. The thin-film acoustic metamaterial sound insulation panel according to claim 1, characterized in that: The frame (2) is provided with a removable cover plate (23), which covers the top of the filling hole (21).

6. The thin-film acoustic metamaterial sound insulation panel according to claim 1, characterized in that: The damping particles (4) have a filling degree between 80% and 90%.

7. The thin-film acoustic metamaterial sound insulation panel according to claim 1, characterized in that: The damping particles (4) are spherical in shape and the particle size of the damping particles (4) does not exceed 1 mm.

8. The thin-film acoustic metamaterial sound insulation panel according to claim 1, characterized in that: The film (1) layer is a polyurethane film or a polyethylene film.

9. The thin-film acoustic metamaterial sound insulation panel according to claim 1, characterized in that: The mass block (3) is disposed on the middle of the thin film (1) in each of the arrays.

10. A thin-film acoustic metamaterial sound insulation structure, characterized in that: It is composed of an array of thin-film acoustic metamaterial sound insulation panels as described in any one of claims 1-9.

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