CN214169539U

CN214169539U - Sound absorber for air film building and air film building

Info

Publication number: CN214169539U
Application number: CN202022363953.8U
Authority: CN
Inventors: 俞金祥; 孙大钊; 侯天宇
Original assignee: Nanjing Pione High Tech Co ltd
Current assignee: Nanjing Pione High Tech Co ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2021-09-10
Anticipated expiration: 2030-10-22

Abstract

The utility model discloses a sound absorber and air film building for air film building belongs to the acoustics field of reforming transform. The sound absorber is provided with a flat plate section and two bending sections, the two bending sections are perpendicular to the flat plate section and are positioned at the edge of the flat plate section, the two bending sections are oppositely arranged, and the flat plate section and the two bending sections form a semi-closed cavity; the support frame is fixedly connected with the two bending sections and is arranged in the semi-closed cavity. The sound absorption coefficient of the sound absorber can be increased, and the sound absorption capacity of the air film building is improved.

Description

Sound absorber for air film building and air film building

Technical Field

The utility model belongs to acoustics transformation field, concretely relates to acoustic absorber and air film building for air film building.

Background

The spatial sound absorber is a sound absorbing member which is dispersedly hung on the upper part of a building space or placed in a room and is used for reducing indoor noise, improving indoor sound quality and adjusting reverberation time. The spatial sound absorber may have various shapes such as a plate shape, a square block shape, a cylindrical shape, a conical shape, a spherical shape and the like according to the use property, the area, the story height, the structural form, the decoration requirement and the sound source characteristic of the building.

In the existing air film building, a plate-shaped sound absorber is generally adopted, but the frequency adjusting effect of the sound absorber on low-frequency sound is poor. Meanwhile, when the panel-shaped sound absorber is suspended in an air film building, the shape of the panel-shaped sound absorber is single, and the panel-shaped sound absorber is not beautiful enough.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a sound absorber that is fit for adjusting low frequency sound, further have pleasing to the eye molding.

Most of the existing sound absorbers have sound absorption holes, but the low-frequency sound in the air film building is difficult to adjust, and the existing sound absorbers with mounting holes are hung in the air film building and are not beautiful.

According to the utility model discloses, the sound absorber has semi-closed cavity, and semi-closed cavity supplies the sound wave of different wavelengths to pass in the sound absorber, and the sound absorber of different length is set for to the low frequency sound as required, improves the performance of reverberation in the air film building.

In addition, sound absorbers with different heights are orderly arranged in the inner wall of the air film to form an uneven shape, so that the monotonous shape of the plate-shaped sound absorbers in the air film building is avoided.

A sound absorber for an air film building is provided with a flat plate section and two bending sections, wherein the two bending sections are arranged perpendicular to the flat plate section, the two bending sections are positioned at the edge of the flat plate section, the two bending sections are arranged oppositely, and the flat plate section and the two bending sections form a semi-closed cavity; the support frame is fixedly connected with the two bending sections and is arranged in the semi-closed cavity.

Furthermore, the support frame is a hollow aluminum alloy frame and is provided with two long edges and two short edges, the two short edges are fixedly connected with the two bending sections respectively, and one long edge is glued with the flat plate section.

Furthermore, the other long edge is provided with a mounting hole for the lifting rope to be suspended on the inner wall of the air film building.

Further, the number of the support frames is two.

Further, the width of the flat plate section is the same as that of the two bending sections, wherein the width ranges from 50 cm to 240 cm.

Further, the height ranges of the two bending sections are both 1-10 cm.

Further, the length of the plate section ranges from 0 to 120 cm.

The air film building is provided with the sound absorbers, and the sound absorbers are orderly arranged on the inner wall of the air film building.

Further, at least one sound absorber has bending sections with different heights.

The beneficial effects of the utility model are that, under the condition that does not increase material area, the sound absorber forms semi-closed cavity, has increased sound absorption coefficient, has improved sound absorbing capacity. The uniformity of the frequency dropped in the reverberation process is guaranteed to be reduced, the sound absorber with the cavity is formed in a right-angle bending mode, and the strength of the sound absorber is improved. The sound absorption frequency is controlled by arranging the sound absorbers with different widths, and the sound absorbers with different heights are arranged, so that the decorative effect and the attractive appearance of the inner wall of the air film building are improved.

Drawings

FIG. 1 is a structural diagram of a flat panel sound absorber used for the inner wall of a gas film building in the prior art;

FIG. 2 is a back side of a prior art flat panel sound absorber;

FIG. 3 is a front view of a prior art flat panel sound absorber;

FIG. 4 is a diagram of the sound absorber for air film building of the present invention;

FIG. 5 is a schematic view of the present invention with a support frame for the sound absorber;

fig. 6 is a schematic view of the sound absorber absorbing sound waves according to the present invention.

Description of the drawings: 10. a flat panel sound absorber; 11. a back side; 12. a fixed frame; 13. a front side; 14. mounting holes; 20. a sound absorber; 21. a flat plate section; 22. bending sections; 23. a semi-enclosed cavity; 24. a support frame; 241. a long side; 242. a short side; 243. mounting holes; v, sound wave; l, length; H. a height; w, inner wall; D. width.

Detailed Description

The following further description is made in conjunction with the accompanying drawings and the detailed description.

Fig. 1 is a structural diagram of a flat panel sound absorber used for an inner wall of a gas film building in the prior art. The flat sound absorber 10 is hung on the inner wall W of the air film building to form different shapes. The pressure in the internal membrane of the air film building is greater than the external pressure, and the maximum span can reach 180 meters. Fig. 2 shows a rear face 11 of a prior art flat panel sound absorber 10. The fixing frame 12 is fixed to the rear surface of the flat panel sound absorber 10. Fig. 3 is a front face 13 of a prior art flat panel sound absorber. The front surface of the flat panel sound absorber 10 has a mounting hole, and the flat panel sound absorber 10 and the fixed frame 12 are connected together through the mounting hole 14. Therefore, the flat panel sound absorber 10 has an excessive number of mounting holes 14 in the front surface and is not aesthetically pleasing. Fig. 1-3 are diagrams of prior art flat panel sound absorbers 10 for air film construction.

Fig. 4 shows an integrally formed sound absorber 20 of the present invention. The sound absorber 20 is a rectangular parallelepiped, the sound absorber 20 extends in the length L direction, and the sound absorber 20 has an outer surface and an inner surface. Inwards form the cutting groove apart from the edge of cuboid respectively, further along the width D direction cutting of cuboid, divide the cuboid into flat section 21 and the section of bending 22. The bending sections 22 are bent inwards for 90 degrees along the cutting grooves, and the two bending sections 22 and the flat plate section 21 form a [ -shaped structure.

Fig. 5 shows the sound absorber 20 of the present invention, which is more favorable to adjust low frequency sound than the flat panel sound absorber in the prior art.

The sound absorber 20 has a flat plate section 21 and two bending sections 22. The plate section 21 is rectangular and the plate section 21 has opposite edge positions. The middle part of the sound absorber 20 forms a flat plate section 21, two edge parts of the sound absorber 20 form bending sections 22 respectively, the bending sections 22 are located at two opposite edge positions of the flat plate section 21, and the two bending sections are arranged oppositely. The bending section 22 is connected with the edge position of the flat plate section 21. More specifically, the edge portion of the sound absorber 20 is bent inward by 90 degrees to form two bent sections 22, and the flat plate section 21 is disposed perpendicular to the bent sections 22. The inner surface of the sound absorber 20 forms a semi-closed cavity 23, that is, the flat plate section 21 and the two bent sections 22 form a semi-closed cavity 23, and the edge of the flat plate section 21 and the edge of the two bent sections 22 form two opposite openings. The distance between the two edge positions forms the length L direction of the plate section 20, wherein the length L of the plate section 20 ranges from 0 to 120 cm.

A support frame 24 is installed in the semi-closed cavity 23 of the sound absorber 20, wherein the support frame 24 is an integrated light aluminum alloy hollow frame, and the hollow frame facilitates the transmission of sound waves V in the semi-closed cavity 23 and passes through another opening from one opening through the semi-closed cavity. The hollow frame is a cuboid having long sides 241 and short sides 242, the cross-section of the hollow frame being rectangular, wherein the length L of the rectangle is 20mm and the width D is 10 mm. Two long edges 241 of the supporting frame 24 are respectively perpendicular to the two bending sections 22, and two short edges 242 respectively abut against the two bending sections 22 and are fixed together by fixing members.

One long side 241 abuts the inner surface of the plate section 21, and the plate section 21 and the one long side 241 are fixed together by gluing. The other long side 241 is provided with a mounting hole 243 for the lifting rope to pass through and be suspended on the inner wall of the air film building. The number of the mounting holes 243 is two, the number of the support frames 24 is two, and a certain mounting distance is provided between the two support frames 24.

Compared with the back plate frame of the flat sound absorber in fig. 2, the back plate frame is too large in shape and heavy in self weight, and the excessive number of back plate frames causes weight burden to the air film building. The utility model discloses cavity frame in figure 5 both keeps certain frame intensity under the condition that reduces the frame dead weight, can support the acoustic absorber again.

The plate section 21 has a length L, a width D and a thickness, wherein the length L is in the range of 0-120 cm. The bending segment 22 has a certain height H, width D and thickness. The width D of the flat plate section 21 is the same as that of the bending section 22, the range of the width D is 50-240cm, and the range of the thickness is 0-1 cm.

Compare in the flat plate sound absorber in fig. 3, through to buckling original flat plate sound absorber 90 degrees, under the surface area that does not reduce the sound absorber, improved the intensity of sound absorber on the one hand, on the other hand makes the sound absorber that has semi-enclosed cavity 23 of different sizes, makes relative control to sound absorption frequency, guarantees to fall the degree of consistency of the frequency that falls in the reverberation process.

The height H of the bending section 22 of the sound absorber in fig. 6 can be set according to the needs of the model in the air film venue. The sound absorbers provided with the bending sections 22 with different heights H are overlapped together like the flat sound absorbers in figure 1, and are orderly arranged, so that the shape of an air film venue is enriched.

The principle of absorption of the acoustic wave V in the semi-enclosed cavity 23 is shown in fig. 6. The width D of the flat plate section 21 is set differently according to the absorption frequency of the sound wave V, for example, the width D of the sound absorber is set to 120cm, so that the sound wave V with the wavelength of more than 120cm can be retained to a certain extent through the sound absorber and the inner wall W of the air film, and the retained sound can be richer. In fig. 6, the sound wave V enters from one opening of the semi-closed cavity 23 and exits from the other opening. If the width D of the plate section 21 is set to 240cm, sound waves V having a wavelength of more than 240cm will be retained through the sound absorber to some extent. When the air film building is acoustically designed, in order to meet the acoustic requirements, the width D of the sound absorber is respectively set according to the space size and the sound absorption quantity requirements, so that the problem that low-frequency sound is excessively absorbed is solved.

The utility model discloses still disclose a gas film building, a plurality of acoustic absorber 20 set up through the lifting rope and form the acoustic absorber subassembly on gas film building inner wall W in figure 6. The sound absorption performance of each sound absorber 20 is improved by suspending a plurality of groups of sound absorber assemblies on the inner wall of the air film building at a distance of 30cm from the left to the right and at a distance of 30cm from the front to the back. In the multiple groups of sound absorber assemblies, the bending sections 22 of at least one sound absorber 20 have different heights H, and the heights H of the bending sections 22 range from 1cm to 10 cm.

The principle of the utility model is that: the sound wave V having a long wavelength enters the semi-enclosed cavity 23 having a certain width D, enters from one opening of the semi-enclosed cavity 23, and exits to the other opening. Because the sound absorbers with different widths D absorb sound waves V with different wavelengths, the sound absorber assembly formed by orderly arranging the sound absorbers with different widths D forms a suitable shape with the inner wall of the air film, so that the detention time of the sound waves V in the semi-closed cavity 23 is controlled, and the required low-frequency sound can be reserved.

The utility model discloses a sound absorber is under the condition that does not increase material area quantity, multiplicable sound absorption coefficient has improved sound absorbing capacity. Further, the monotony and the local sense of the air film building space can be improved, and the agile, harmonious and rich space layering sense is created.

Claims

1. The sound absorber for the air film building is characterized by comprising a flat plate section and two bending sections, wherein the two bending sections are respectively and vertically arranged with the flat plate section, the two bending sections are positioned at the edge of the flat plate section, the two bending sections are oppositely arranged, and the flat plate section and the two bending sections form a semi-closed cavity;

the support frame is fixedly connected with the two bending sections and is arranged in the semi-closed cavity.

2. The sound absorber as claimed in claim 1, wherein the support frame is a hollow aluminum alloy frame having two long sides and two short sides, the two short sides are respectively fixedly connected to the two bending sections, and one long side is glued to the plate section.

3. The sound absorber of claim 2, wherein the other long side is provided with a mounting hole for hanging the lifting rope on the inner wall of the air film building.

4. The sound absorber of claim 3, wherein the number of supports is two.

5. The sound absorber of claim 4, wherein the width of the flat section and the width of the two bending sections are the same, and the widths are both in the range of 50-240 cm.

6. The sound absorber of claim 5, wherein the height of each of the two bending sections is in the range of 1-10 cm.

7. The sound absorber of claim 6, wherein the length of the plate section is in the range of 0-120 cm.

8. An air film building having the sound absorber as claimed in claims 1 to 7, wherein a plurality of sound absorbers are arranged in an orderly manner on the inner wall of the air film building.

9. The air film building of claim 8, wherein at least one sound absorber has bends of different heights.