Sound absorption module and air film building

Abstract

The utility model belongs to the field of acoustics, and solves the problem of better improving an acoustic environment in a building, especially the problem of sound focusing of a gas film building or a gas film museum. The sound absorption module comprises an air bag and an air pipe connected to the air bag, a sound absorption plate is arranged on the air bag, and the air bag is filled with light gas with the density smaller than that of air or is vacuumized, so that the buoyancy of the air bag is not smaller than the downward force borne by the air bag. The utility model further relates to an air film building applying the sound absorption module. The beneficial effects are that the sound absorption plate is not attached to the gas film, the sound absorption module does not cause burden on the gas film, and the gas film is more durable.

Description

Technical Field

[0001] The utility model belongs to the field of acoustics and relates to a sound absorption module and an air film building. Background Art

[0002] Compared with traditional concrete buildings, air-supported buildings have the advantages of flexible and efficient construction, low carbon and environmental protection, and low construction cost. In recent years, they have been used in various exhibition halls, gymnasiums, and cultural performance venues, etc., and can be called air-supported buildings.

[0003] Air-supported buildings are curved dome structures without beams or columns, which are prone to acoustic focusing. Since the curved dome of the air-supported building cannot bear weight, it is difficult to lay sound-absorbing materials on the inner surface of the air-supported building, which results in long indoor reverberation time and poor acoustic environment quality in large buildings such as exhibition halls constructed with air-supported buildings.

[0004] In the existing solutions to solve the sound focusing phenomenon, most of them are to hang the sound absorbing panels on the air membrane dome, but this will cause a burden on the air membrane structure and easily damage the air membrane, such as Chinese patents CN222575760U, CN220704814U, and CN211473614U. Utility Model Content

[0005] The utility model aims to provide a sound absorption module, which solves the problem of better improving the acoustic environment in a building.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The utility model provides a sound absorbing module, comprising an airbag and an air pipe connected to the airbag, wherein the airbag is provided with a sound absorbing plate, and the airbag is filled with a light gas with a density less than that of air or is vacuumed so that the buoyancy of the airbag is not less than the downward force exerted on the airbag.

[0008] Preferably, at least the top of the airbag is soft.

[0009] Preferably, the airbag is inflatable and deflable.

[0010] Preferably, the bottom of the airbag has a flat surface, and the sound absorbing plate is attached to the flat surface of the airbag.

[0011] Preferably, it also includes an air tube connected to the airbag, through which the airbag can be inflated or deflated.

[0012] Furthermore, a pressure monitoring device is provided on the trachea.

[0013] Furthermore, the gas pipe is connected to a light gas recovery device.

[0014] Preferably, the sound absorbing panel is a whole piece or a plurality of small pieces spliced ​​together.

[0015] A membrane building is also provided, comprising an membrane forming a building frame, wherein the membrane has a building space, wherein a sound absorbing module is arranged in the building space, wherein the sound absorbing module comprises an air bag and an air pipe connected to the air bag, wherein a sound absorbing plate is arranged on the air bag, and wherein the air bag is filled with a light gas having a density less than that of air or is evacuated so that the buoyancy of the air bag is not less than the downward force exerted on the air bag.

[0016] Preferably, the airbag is soft and attached to the top center of the air membrane.

[0017] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0018] The sound absorbing module and air film building of the utility model can effectively reduce the sound focusing phenomenon by connecting the sound absorbing panel to the buoyant or floating air bag and adjusting the sound absorbing panel to the appropriate position in the air film building. In addition, the sound absorbing panel can achieve the beneficial effect of not being attached to the air film, and the sound absorbing module will not cause a burden on the air film, making the air film more durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0020] Figure 1 It is a simulation schematic diagram of the air film building structure to which the utility model is applied;

[0021] Figure 2 This is a schematic diagram of the structure of the sound absorption module of the utility model;

[0022] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is a schematic diagram of the structure of the air film building of the utility model;

[0024] Figure 5 This is the sound pressure level distribution when no sound absorption module is installed in the air membrane building. A point sound source is set at the coordinates (30, 30, 2) to calculate the sound pressure level distribution on the ground.

[0025] Figure 6 It is the sound pressure level distribution after the sound absorption module is installed in the air membrane building. A point sound source is set at the coordinates (30, 30, 2) to calculate the sound pressure level distribution on the ground.

[0026] The reference numerals are described as follows:

[0027] 1. Airbag; 2. Air pipe; 3. Sound-absorbing panel; 4. Pressure monitoring device; 5. Light gas recovery device; 6. Air membrane; 61. Building space. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] like Figure 1 The air-film building shown in the figure includes an air film 6 without a supporting structure. The building space 61 in the air film 6 is inflated, and the air film 6 is supported by the pressure difference between the inside and the outside. However, the sound focusing phenomenon is easily formed in the air film 6 (see Figure 5 ).

[0030] like Figure 2 The sound absorption module shown is used for Figure 1 The rear structure of the air-film building is as follows Figure 4 shown.

[0031] like Figure 2 The sound absorbing module includes an airbag 1, an air pipe 2 corresponding to the airbag 1, a sound absorbing panel 3, a pressure monitoring device 4 and a light gas recovery device 5.

[0032] The airbag 1 has two air chambers, or can also be described as having two air chambers 1. The airbag 1 can also include other numbers of air chambers according to actual use requirements.

[0033] The airbag 1 is filled with a gas lighter than air, such as helium. The two air cavities are independent of each other, and the rupture and leakage of one air cavity will not affect the other air cavity. The lift generated by one air cavity can also ensure that the entire sound absorbing module floats in the air without falling. When the buoyancy of the airbag 1 is greater than the downward force exerted on the airbag 1 (such as the sum of the weight of the airbag 1 itself, the weight of the sound absorbing plate 3, and the weight of the glue between the airbag 1 and the sound absorbing plate 3), it can float. When the buoyancy of the airbag 1 is equal to the downward force exerted on the airbag 1, the airbag 1 can be suspended, and the top of the airbag 1 may not be in contact with the air film 6.

[0034] The material of the airbag 1 can be high-density polyethylene or aluminum film. The airbag 1 is soft and can have a good fit with the lower surface of the dome of the air film 6, so it has good stability, making it difficult for the airbag 1 to slip relative to the air film 6, and playing a stabilizing role for the airbag 1. The top of the airbag 1 can be soft, and the other parts such as the bottom can be soft or hard.

[0035] Of course, the airbag 1 may also be hard, in which case the airbag 1 may be evacuated without being filled with a gas lighter than air.

[0036] A trachea 2 is provided corresponding to each air cavity, and the airbag 1 is inflated and deflated through the trachea 2 .

[0037] The sound absorbing board 3 can be a low-density sound absorbing foam such as melamine foam, or a fiber-type sound absorbing material such as polyester fiber. The sound absorbing board 3 can be a whole sound absorbing board, or it can be composed of several small sound absorbing boards spliced ​​together. Of course, the sound absorbing board 3 is not limited to a flat plate, and can also be other structures. There is no particular limitation on the structure of the sound absorbing board 3.

[0038] The sound absorbing plate 3 can be connected to the airbag 1 by bonding, or the sound absorbing plate 3 can be sheathed together with the airbag 1 through a net bag.

[0039] As a preferred example, Figure 3 As shown, the sound absorbing plate 3 is connected to the lower surface of the airbag 1 .

[0040] Preferably, the lower surface of the airbag 1 is configured to be a flat plate (for example, when the airbag 1 is hard, or when the top of the airbag 1 is soft and the bottom is hard), so that the sound absorbing plate 3 is easily attached.

[0041] The airbag 1 drives the sound absorbing panel 3 to float on the top of the building space 61 in the air film building. The effect is better when it is placed in the center of the dome of the air film 6. Figure 5 and Figure 6 Comparison shown.

[0042] like Figure 2 As shown, the two air chambers of the airbag 1 are respectively connected to two air pipes 2, and the air pipes 2 are connected to the pressure monitoring device 4 on the ground. The air pressure in the two air chambers of the airbag 1 can be monitored in real time through the pressure monitoring device 4. When it is found that the air pressure in the airbag 1 is lower than the safety threshold, helium can be added to the airbag 1 through the air pipe 2. When the sound absorbing panel 3 and the airbag 1 need to be dropped to the ground, the air pipe 2 is connected to the light gas recovery device 5, and the helium in the airbag 1 is absorbed by the light gas recovery device 5 to make the sound absorbing module fall to the ground. The helium recovered by the light gas recovery device 5 can be used again.

[0043] by Figure 2Taking the sound absorption module shown as an example, the volume of the two air cavities of the airbag 1 is 565 cubic meters. When the air cavity is filled with helium, the density of helium is calculated as 0.18 kg / cubic meter; the density of air is calculated as 1.25 kg / cubic meter; then any air cavity can drive a load of 604 kg suspended in the air. The sound absorption board 3 uses lightweight melamine sound absorption foam, and the density is calculated as 9 kg / cubic meter. The thickness of the sound absorption board 3 is 25 mm, and the average sound absorption coefficient is 0.7. The volume of the sound absorption board 3 is 28 cubic meters and the weight is 256 kg. The skin material of the airbag 1 is high-density polyethylene, with a thickness of about 20 microns and a density of about 0.96 g / cubic centimeter. The total volume of the high-density polyethylene material used in the entire airbag 1 is about 0.045 cubic meters, and the total weight of the airbag 1 is about 44 kg. The airbag 1 and the sound absorbing plate 3 are connected by bonding, with a bonding area of ​​1125 square meters, a bonding thickness of 0.1 mm, a density of the adhesive of 1.2 g / cm3, and a total weight of the adhesive of 135 kg. The weight of a single air cavity filled with helium minus the weight of the sound absorbing plate 3, the weight of the airbag 1 itself, and the weight of the adhesive is 169 kg.

[0044] In summary, the sound absorption module and air-supported building of this example can solve the sound focusing problem of the dome-type air-supported building and control the reverberation time of the dome-type air-supported building. Moreover, the sound absorption module does not need to be attached to the air-supported building, which will not burden the air-supported building and make the air-supported building more durable. Moreover, the sound absorption module is easy to store and can be reused many times.

[0045] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A sound absorption module, characterized in that: The invention comprises an airbag (1) and an air tube (2) connected to the airbag (1), wherein the airbag (1) is provided with a sound absorbing plate (3), and the airbag (1) is filled with a light gas having a density less than that of air or is evacuated so that the buoyancy of the airbag (1) is not less than the downward force exerted on the airbag (1).

2. The sound absorbing module according to claim 1, characterized in that: At least the top of the airbag (1) is soft.

3. The sound absorbing module according to claim 1, characterized in that: The airbag (1) is inflatable and deflable.

4. The sound absorbing module according to claim 1, characterized in that: The bottom of the airbag (1) has a flat surface, and the sound absorbing plate (3) is attached to the flat surface of the airbag (1).

5. The sound absorbing module according to claim 1, characterized in that: It also comprises an air tube (2) connected to the air bag (1), and the air bag (1) can be inflated or deflated through the air tube (2).

6. The sound absorbing module according to claim 5, characterized in that: The trachea (2) is provided with a pressure monitoring device (4).

7. The sound absorbing module according to claim 5, characterized in that: The gas pipe (2) is connected to a light gas recovery device (5).

8. The sound absorbing module according to claim 1, characterized in that: The sound absorbing panel (3) is a whole piece or a plurality of small pieces spliced ​​together.

9. An air membrane building, comprising an air membrane (6) constituting a building frame, wherein the air membrane (6) has a building space (61), characterized in that: A sound absorption module is arranged in the building space (61), the sound absorption module comprising an air bag (1) and an air pipe (2) connected to the air bag (1), a sound absorption plate (3) is arranged on the air bag (1), and the air bag (1) is filled with a light gas having a density less than that of air or is evacuated so that the buoyancy of the air bag (1) is not less than the downward force exerted on the air bag (1).

10. The air-film building according to claim 9, characterized in that: The airbag (1) is soft and is attached to the top center of the air membrane (6).

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