CN217204729U

CN217204729U - Broadband cavity sound barrier

Info

Publication number: CN217204729U
Application number: CN202220165267.6U
Authority: CN
Inventors: 薛倩
Original assignee: Nanjing Hongrun Acoustics Technology Co ltd
Current assignee: Nanjing Hongrun Acoustics Technology Co ltd
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2022-08-16
Anticipated expiration: 2032-01-21

Abstract

The utility model discloses a broadband cavity sound barrier, which belongs to the technical field of sound barriers and comprises a sound insulation board, wherein soundproof cotton is arranged on one side of the sound insulation board, a damping sound insulation felt is arranged on one side of the soundproof cotton, which is far away from the sound insulation board, a first perforated plate is arranged on one side of the damping sound insulation felt, which is far away from the soundproof cotton, a cavity box is arranged on one side of the first perforated plate, which is far away from the damping sound insulation felt, and a second perforated plate is arranged on one side of the cavity box, which is far away from the first perforated plate; through the sound insulation board, soundproof cotton, damping sound insulation felt, first perforated plate, cavity box and the second perforated plate that set up, the structure is mutually supported, and the noise gets into the cavity box from the second perforated plate, then loops through first perforated plate, damping sound insulation felt and soundproof cotton, carries out the separation layer upon layer, reduces the noise that transmits to the user house, is favorable to improving the practicality of device, promotes user's living experience.

Description

Broadband cavity sound barrier

Technical Field

The utility model relates to a sound barrier technical field especially relates to a wide band cavity sound barrier.

Background

Along with the rise of scientific and technological houses, the living standard of people is continuously improved, and the use of the air conditioning fresh air unit and the cooling tower improves the life of people and improves the comfort level of houses.

However, the air conditioning fresh air handling unit and the cooling tower can generate low-frequency noise in the using process, the noise is transmitted to the home of a user through a wall and air, the low-frequency noise in the home of the user exceeds the standard, the living experience of the user is influenced, the body health of the user can be influenced for a long time, and therefore the broadband cavity sound barrier is provided.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of prior art, the utility model provides a wide band cavity sound barrier, the noise that the sound source sent gets into the interior vibration buffering of cavity box, reduces the noise decibel, is favorable to improving the practicality of device, promotes user's living experience.

In order to solve the technical problem, the utility model provides a following technical scheme: the utility model provides a wide band cavity sound barrier, includes the acoustic baffle, acoustic baffle one side fixed mounting has soundproof cotton, soundproof cotton keeps away from acoustic baffle one side fixed mounting has damping sound insulation felt, damping sound insulation felt keeps away from soundproof cotton one side fixed mounting has first perforated plate, first perforated plate is kept away from damping sound insulation felt one side fixed mounting has the cavity box, the cavity box is kept away from first perforated plate one side fixed mounting has the second perforated plate.

Preferably, U-shaped members are fixedly mounted on the upper side and the lower side of the sound insulation plate and the second perforated plate, the sound insulation plate is located on one side in the U-shaped members, and the second perforated plate is located on the other side in the U-shaped members.

Preferably, the cavity boxes are multiple in number and are located between the second perforated plate and the first perforated plate at equal intervals.

Preferably, a resonant cavity is enclosed between adjacent cavity boxes and the second perforated plate and the first perforated plate.

Preferably, the cavity box includes the box body, box body middle part is equipped with well cavity, the box body is close to sound inlet has been seted up to second perforated plate one side, the box body is close to sound outlet has been seted up to first perforated plate one side, sound inlet and sound outlet all with well cavity intercommunication.

Preferably, the thickness of the soundproof cotton is larger than that of the soundproof plate, the damping soundproof felt is larger than that of the soundproof plate, and the first perforated plate is larger than that of the second perforated plate.

Further, soundproof cotton thickness is 50mm, the steel sheet that the acoustic baffle thickness is 12mm or 2mm thick, damping sound insulation felt thickness is 2mm, first perforated plate thickness is 1mm, second perforated plate thickness is 0.8 mm.

Preferably, the second perforated plate is an aluminum alloy perforated plate, and the first perforated plate is made of a galvanized perforated plate.

Preferably, the inner diameter of the sound inlet is larger than the inner diameter of the sound outlet.

Preferably, the cavity cell is a helmholtz cavity cell.

The utility model discloses a broad band cavity sound barrier's theory of operation does: with second perforated plate towards sound source one side, the sound insulating board is towards user's house one side, the sound source sends low frequency noise, get into in resonant cavity and the cavity box from the hole of second perforated plate, the noise gets into well cavity from the sound inlet, vibration buffering in well cavity and resonant cavity, the noise is weakened, then get into damping sound insulation felt from the hole of sound outlet and first perforated plate, carry out the second buffering to the noise, the noise that sees through damping sound insulation felt gets into the soundproof cotton and further is absorbed, then contact the sound insulating board, it is big than the sound outlet to advance the sound outlet setting, can be with the better lock of noise buffering in the cavity intracavity, layer upon layer under the buffering separation, the noise is greatly reduced, be difficult to transmit to in the user's house.

Compared with the prior art, the utility model discloses the beneficial effect that can reach is:

1. the sound insulation board, the soundproof cotton, the damping sound insulation felt, the first perforated plate and the second perforated plate are arranged in a matched mode, when the noise contacts the device, the device is in contact with a layer of barrier, and the noise is buffered and damped, so that the noise volume is greatly reduced, the practicability of the device is improved, the influence of low-frequency noise in a user house is reduced, and the living experience of the user is improved;

2. through set up the clearance between the cavity box, enclose synthetic resonant cavity with second perforated plate and first perforated plate, the air in the cavity of cavity box and the air of resonant cavity constitute one-dimensional vibration system, can with form resonance between the sound wave to make the combination of cavity box and resonant cavity have certain absorption to different frequency channels sound wave, consequently can absorb the sound wave of wideer frequency, further improve the practicality of device, thereby further promotion user's living experience.

Drawings

FIG. 1 is a schematic diagram illustrating an overall structure of a broadband cavity sound barrier according to an embodiment;

FIG. 2 is a schematic view of a broadband cavity acoustic barrier according to an embodiment of the present invention at the location A shown in FIG. 1;

FIG. 3 is a schematic diagram of a cavity box structure of a broadband cavity sound barrier according to an embodiment;

wherein: 1. a sound insulation plate; 2. sound insulation cotton; 3. a cavity cell; 31. a box body; 32. a sound inlet; 33. a hollow cavity; 34. a sound outlet; 4. a second perforated plate; 5. a U-shaped member; 6. damping sound insulation felt; 7. a first perforated plate; 8. a resonant cavity.

Detailed Description

The technical solution of the present invention will be explained by the following embodiments with reference to the accompanying drawings 1-3 of the specification.

Example (b):

as shown in fig. 1-3, the utility model provides a pair of wide band cavity sound barrier, including sound insulation board 1, sound insulation board 1 one side bonding is fixed with soundproof cotton 2, soundproof cotton 2 keeps away from sound insulation board 1 one side bonding and is fixed with damping sound insulation felt 6, damping sound insulation felt 6 keeps away from soundproof cotton 2 one side bonding and is fixed with first perforated plate 7, first perforated plate 7 keeps away from damping sound insulation felt 6 one side welded fastening and has equidistant distribution's cavity box 3, cavity box 3 keeps away from first perforated plate 7 one side welded fastening and has second perforated plate 4, sound insulation board 1 and second perforated plate 4 are all welded fastening have U type component 5 in both sides from top to bottom, sound insulation board 1 is located U type component 5 one side, second perforated plate 4 is located opposite side in U type component 5.

The cavity box 3 comprises a box body 31, a hollow cavity 33 is arranged inside the box body 31, a sound inlet 32 is formed in one side, close to the second perforated plate 4, of the box body 31, a sound outlet 34 is formed in one side, close to the first perforated plate 7, of the box body 31, and the sound inlet 32 and the sound outlet 34 are communicated with the hollow cavity 33.

The inner diameter of the sound inlet 32 is larger than that of the sound outlet 34.

The adjacent cavity boxes 3 and the first perforated plate 7 and the second perforated plate 4 enclose a resonant cavity 8.

The air in the hollow cavity 33 of the cavity box 3 and the air in the resonant cavity 8 form a one-dimensional vibration system, which can form resonance with the sound waves, so that the combination of the cavity box 3 and the resonant cavity 8 can absorb the sound waves of different frequency bands to a certain extent.

In this embodiment, the sound insulation board 1 is 12mm thick, the soundproof cotton 2 is 50mm thick, the damping sound-insulating felt 6 is 2mm thick, the second perforated plate 4 is an aluminum alloy perforated plate with a thickness of 0.8mm, and the first perforated plate 7 is a galvanized perforated plate with a thickness of 1 mm.

It should be noted that the 12mm sound insulation board 1 can also be replaced by a 2mm steel board, in this embodiment, the cavity box 3 is a helmholtz cavity box, which not only plays a role of a cavity resonance structure, but also plays a role of decoration and beautification.

The working steps are as follows: after the device assembly is accomplished, install the device, second perforated plate 4 is towards sound source one side, acoustic baffle 1 is towards user's house one side, the sound source sends low frequency noise, get into in resonant cavity 8 and the cavity box 3 from the hole of second perforated plate 4, low frequency noise gets into well cavity 33 from sound inlet 32, get through the hole and the damping sound-proof felt 6 entering soundproof cotton 2 of first perforated plate 7 from sound outlet 34 in well cavity 33, acoustic baffle 1 cushions the noise that sees through soundproof cotton 2.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a wide band cavity sound barrier, includes sound insulation board, its characterized in that: sound insulation board one side fixed mounting has soundproof cotton, soundproof cotton keeps away from sound insulation board one side fixed mounting has damping sound insulation felt, damping sound insulation felt keeps away from soundproof cotton one side fixed mounting has first perforated plate, first perforated plate is kept away from damping sound insulation felt one side fixed mounting has the cavity box, the cavity box is kept away from first perforated plate one side fixed mounting has the second perforated plate.

2. The broadband cavity acoustic barrier of claim 1, wherein: the sound insulation plate and the second perforated plate are fixedly provided with U-shaped members on the upper side and the lower side respectively, the sound insulation plate is located on one side in the U-shaped members, and the second perforated plate is located on the other side in the U-shaped members.

3. The broadband cavity acoustic barrier of claim 1, wherein: the cavity box quantity is a plurality of, and it is located equidistance distribution between second perforated plate and the first perforated plate.

4. The broadband cavity acoustic barrier of claim 3, wherein: and a resonant cavity is enclosed by the second perforated plate and the first perforated plate between adjacent cavity boxes.

5. A broadband cavity sound barrier according to claim 1, wherein: the cavity box comprises a box body, a hollow cavity is arranged in the middle of the box body, the box body is close to one side of the second perforated plate, a sound inlet is formed in one side of the second perforated plate, the box body is close to one side of the first perforated plate, a sound outlet is formed in one side of the first perforated plate, and the sound inlet and the sound outlet are communicated with the hollow cavity.

6. A broadband cavity sound barrier according to claim 1, wherein: the thickness of the soundproof cotton is larger than that of the soundproof plate, the damping soundproof felt is larger than that of the first perforated plate and the second perforated plate.

7. A broadband cavity sound barrier according to claim 1, wherein: the second perforated plate is an aluminum alloy perforated plate, and the first perforated plate is made of a galvanized perforated plate.

8. A broadband cavity sound barrier according to claim 5, wherein: the inner diameter of the sound inlet is larger than that of the sound outlet.

9. The broadband cavity acoustic barrier of claim 1, wherein: the cavity box is a Helmholtz cavity box.