CN217386661U

CN217386661U - Pneumatic element noise attenuation structure

Info

Publication number: CN217386661U
Application number: CN202122906050.4U
Authority: CN
Inventors: 罗英俊; 何亮; 何超
Original assignee: Zhuhai Bojay Electronics Co Ltd
Current assignee: Zhuhai Bojay Electronics Co Ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-09-06
Anticipated expiration: 2031-11-25

Abstract

The utility model discloses a pneumatic element noise attenuation structure aims at providing a pneumatic element noise attenuation structure who changes the gas flow way and be convenient for absorb noise, effectively reduces noise and simple structure, convenient to use that the gas flow is. The utility model discloses a lid and noise elimination subassembly, the lid is provided with the inlet port with the pipe connection looks adaptation, the noise elimination subassembly sets up in the lid, the noise elimination subassembly includes two sets of noise elimination piece and guiding subassembly, and is two sets of the noise elimination piece respectively with the lid is connected, the guiding subassembly sets up two sets of between the noise elimination piece, the guiding subassembly is provided with the water conservancy diversion piece, the one end that the pipe connection was kept away from to the water conservancy diversion piece is provided with the water conservancy diversion hole. The utility model discloses be applied to the technical field that the acoustic test was fallen and is made an uproar.

Description

Pneumatic element noise attenuation structure

Technical Field

The utility model relates to a technical field that the acoustic test was fallen and is made an uproar, in particular to pneumatic component noise attenuation structure.

Background

A muffler is a device that allows airflow to pass through while effectively reducing noise. During the gas flow, noise is generated due to the interaction between the gas and the solid medium. These noises can have adverse effects during the acoustic testing process, and affect the testing effect.

In the existing noise elimination structure, a nested structure is mostly adopted, sound absorption materials are filled between all layers of the surface of the equipment, and the noise attenuation is weakened through drainage and small hole exhaust reduction, so that the purpose of reducing noise is achieved, but the whole acoustic reflection surface of the nested structure is large, and the noise interference still exists in the acoustic test with high precision requirement.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome prior art not enough, provide a change gas flow channel and be convenient for absorb a pneumatic element noise attenuation structure of noise, effectively reduce noise and simple structure, convenient to use that gas flow is.

The utility model adopts the technical proposal that: the utility model discloses it includes the lid and eliminates the noise subassembly, the lid is provided with the inlet port with the pipe connection looks adaptation, the noise subassembly sets up in the lid, the noise subassembly includes two sets of noise elimination piece and guiding subassembly, and is two sets of the noise elimination piece respectively with the lid is connected, the guiding subassembly sets up two sets of between the noise elimination piece, the guiding subassembly is provided with the water conservancy diversion piece, the one end that the pipe connection was kept away from to the water conservancy diversion piece is provided with the water conservancy diversion hole.

Further, the cover body is further provided with an air outlet connected with an external pneumatic mechanism, and the air outlet is arranged at one end, far away from the flow guide hole, of the cover body.

Further, a plurality of sealing blocks are arranged at the joint of the cover body, and a silencing cushion block is arranged on the inner side of the cover body.

Furthermore, the flow guide assembly is further provided with a fixing plate, the flow guide blocks are connected with the fixing plate, the fixing plate is respectively connected with the two groups of silencing blocks in a matched mode, and through holes matched with the flow guide holes are formed in the fixing plate.

Furthermore, the guide blocks and the two groups of silencing blocks both use sound absorption materials.

The utility model has the advantages that: the utility model adopts the design of the folding airflow channel, and the sound absorption structure is arranged at the periphery of the airflow channel, so that the gas is more fully contacted with the sound absorption structure, the noise elimination effect is improved, in addition, the whole structure is small, and the influence on the acoustic test with high precision requirement is reduced; the sealing blocks are added at the seams of the box body, so that the air tightness is good, the gas loss is reduced, and the sound absorption effect of the whole structure is improved; the sound attenuation cushion block is designed on the inner side of the box body, sound is attenuated through the flexible sound attenuation cushion block, the sound frequency transmitted from the box body is reduced, noise is reduced, and the sound attenuation effect is improved.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is an exploded view of the present invention;

fig. 3 is a schematic structural view of the flow direction of the air current of the present invention.

Detailed Description

As shown in fig. 1 to 3, in this embodiment, the utility model discloses a lid 1 and noise elimination subassembly 2, lid 1 is provided with the inlet port with the pipe connection looks adaptation, noise elimination subassembly 2 sets up in the lid 1, noise elimination subassembly 2 includes two sets of noise elimination piece 3 and water conservancy diversion subassembly 4, and is two sets of noise elimination piece 3 respectively with lid 1 is connected, water conservancy diversion subassembly 4 sets up two sets of between the noise elimination piece 3, water conservancy diversion subassembly 4 is provided with water conservancy diversion piece 5, the one end that water conservancy diversion piece 5 kept away from the pipe connection is provided with the water conservancy diversion hole, water conservancy diversion subassembly 4 is provided with the through-hole with inlet port looks adaptation. Adopt foldable air current channel design to be provided with sound absorbing structure at the air current channel periphery, make gaseous more abundant with the contact of sound absorbing structure, improve noise cancelling effect, overall structure is small and exquisite in addition, reduces to cause the influence to the acoustic test that the required precision is high.

In this embodiment, the cover body 1 is further provided with an air outlet connected with an external pneumatic mechanism, the air outlet is arranged at one end, away from the flow guide hole, of the cover body 1, and the flow guide assembly 4 is further provided with a through hole matched with the air outlet.

In this embodiment, a plurality of sealing blocks 6 are disposed at the joint of the cover body 1, a silencing pad block is disposed on the inner side of the cover body 1, and the silencing pad blocks are made of flexible materials and are tightly attached to the cover body 1. The sealing blocks 6 are added at the seams of the box body, the air tightness is good, the noise elimination cushion blocks are designed on the inner sides, sound is attenuated through the flexible noise elimination cushion blocks, the frequency of sound transmitted from the box body is reduced, noise is reduced, and the noise elimination effect is improved.

In this embodiment, the flow guiding assembly 4 further includes a fixing plate 7, the flow guiding block 5 is connected to the fixing plate 7, the fixing plate 7 is respectively connected to the two sets of the noise elimination blocks 3 in a matching manner, a through hole matched with the flow guiding hole is formed in the fixing plate 7, and a groove matched with the fixing plate 7 is formed in the noise elimination block 3. The fixing plate 7 is adopted to guide the flow block 5.

In this embodiment, the diversion block 5 and the two sets of the noise elimination blocks 3 both use sound-absorbing materials, and the sound-absorbing materials are sound-absorbing cotton. The design of sound absorption materials is adopted to surround the periphery of the airflow channel, so that the noise attenuation efficiency of the sound absorption box is improved, the occupied space of the whole structure is reduced, the acoustic reflection surface is reduced, and the test accuracy is improved.

The utility model discloses a theory of operation:

the gas enters the box body through the gas pipe joint, enters the flow guide assembly 4, then passes through the flow guide hole along a set stroke, and flows out of the external pneumatic mechanism through the gas outlet, and the flow guide block 5 and the noise elimination block 3 absorb the internal vibration of the gas flow during the gas entering the flow guide assembly 4, so that the purpose of reducing noise is achieved.

While the embodiments of the present invention have been described in terms of practical embodiments, they are not intended to limit the scope of the invention, and modifications of the embodiments and combinations with other embodiments will be apparent to those skilled in the art in light of the present description.

Claims

1. A pneumatic element noise attenuation structure characterized by: the novel muffler comprises a cover body (1) and a muffler assembly (2), wherein the cover body (1) is provided with an air inlet matched with an air pipe connector, the muffler assembly (2) is arranged in the cover body (1), the muffler assembly (2) comprises two sets of muffler blocks (3) and a flow guide assembly (4), the muffler blocks (3) are respectively connected with the cover body (1), the flow guide assembly (4) is arranged between the two sets of muffler blocks (3), the flow guide assembly (4) is provided with flow guide blocks (5), and one end, away from the air pipe connector, of each flow guide block (5) is provided with a flow guide hole.

2. A pneumatic element noise attenuation structure according to claim 1, wherein: the cover body (1) is further provided with an air outlet connected with an external pneumatic mechanism, and the air outlet is formed in one end, far away from the flow guide hole, of the cover body (1).

3. A pneumatic element noise attenuation structure according to claim 1, wherein: the joint of the cover body (1) is provided with a plurality of sealing blocks (6), and the inner side of the cover body (1) is provided with a silencing cushion block.

4. A pneumatic element noise attenuation structure according to claim 1, wherein: the flow guide assembly (4) is further provided with a fixing plate (7), the flow guide blocks (5) are connected with the fixing plate (7), the fixing plate (7) is respectively connected with the two noise elimination blocks (3) in a matched mode, and through holes matched with the flow guide holes are formed in the fixing plate (7).

5. A pneumatic element noise attenuation structure according to claim 1, wherein: the guide blocks (5) and the two groups of silencing blocks (3) both use sound-absorbing materials.