CN216110922U

CN216110922U - Smoke discharging silencer

Info

Publication number: CN216110922U
Application number: CN202122724911.7U
Authority: CN
Inventors: 陈志锋; 黄晓锋
Original assignee: Xiamen Quietime Co Ltd
Current assignee: Xiamen Quietime Co Ltd
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2022-03-22
Anticipated expiration: 2031-11-08

Abstract

The utility model discloses a smoke exhaust muffler, comprising: insert wind pipeline, main part pipeline, inlayer foam metal pipe, external air-out pipeline and hinder the choke element that the air current passes through outward, the one end of main part pipeline is located to external air-in pipeline, and the other end of main part pipeline is located to external air-out pipeline, and the inside center department of main part pipeline is located to the choke element, and inlayer foam metal pipe suit has the clearance in the main part pipeline to and main part pipeline between. The utility model has simple structure and good silencing effect.

Description

Smoke discharging silencer

Technical Field

The utility model relates to the technical field of noise reduction devices, in particular to a smoke exhaust silencer.

Background

The exhaust emission noise of some large equipment engines is too loud, such as a thermal power generator, a diesel engine and the like, which affects the health and hearing, and even affects the nervous system, causing the problems of dizziness, headache, tinnitus and the like, so that the noise of the large equipment engines needs to be reduced.

Disclosure of Invention

The utility model aims to provide a smoke exhaust silencer which is simple in structure and good in silencing effect.

In order to achieve the purpose, the technical scheme provided by the utility model is as follows:

a smoke evacuation muffler comprising: the external access air pipeline, the main pipeline, the inner layer foam metal pipe, the external air outlet pipeline and the flow resisting element for preventing air flow from passing through; the external air inlet pipeline is arranged at one end of the main pipeline, the external air outlet pipeline is arranged at the other end of the main pipeline, the flow resisting element is arranged at the center of the interior of the main pipeline, and the inner layer foam metal pipe is sleeved in the main pipeline and has a gap with the main pipeline.

Furthermore, the flow resisting element is a conical pipe, and two end parts of the conical pipe are conical and respectively face the external access air pipeline and the external air outlet pipeline.

Further, the conical tube is made of foam metal.

Furthermore, a cavity is arranged inside the conical tube, the tube body of the conical tube is made of foam metal, and the cavity is filled with sound absorption materials.

Furthermore, sound absorption materials are filled between the main body pipeline and the inner layer foam metal pipe.

Further, the sound absorption material is glass wool or aerogel.

Further, the inner layer foam metal pipe is a foam aluminum pipe, and the foam metal is foam aluminum.

Furthermore, the included angle between the end part of the conical pipe and the pipe body of the conical pipe is 40-60 degrees.

Furthermore, the external air inlet pipeline, the inner layer foam metal pipe, the conical pipe and the external air outlet pipeline are positioned on the same axis.

Further, the cross-sectional area of the inner wall of the external inlet air pipeline is S₁The cross sectional area of the inner wall of the inner layer foam metal pipe is S₂The cross-sectional area of the outer wall of the conical pipe is S₃，S₁＜S₂-S₃。

By adopting the technical scheme, the utility model has the beneficial effects that: the utility model utilizes the flow resistance of the flow resisting element and the sound absorption performance of the inner layer foam metal pipe to eliminate the noise of the gas entering the main pipeline, discharge the gas out of the main pipeline after flow resisting, and has simple structure and good noise elimination effect.

Drawings

Fig. 1 is a schematic sectional view of a front view of the first embodiment.

Fig. 2 is a schematic sectional view of a front view of the second embodiment.

Wherein: 1. the external connection air duct, 2, the inner layer foam metal pipe, 3, the main body duct, 4, the sound absorption material, 5, the conical pipe and 6, the external connection air outlet duct.

Detailed Description

The utility model is further described with reference to the following drawings and detailed description.

As shown in fig. 1 and 2, the present invention discloses a smoke exhaust muffler, comprising: the external access air pipeline 1, the main pipeline 3, the inner layer foam metal pipe 2, the external air outlet pipeline 6 and the flow resisting element for resisting the air flow. The outer one end of inserting wind pipeline 1 and locating main part pipeline 3, the other end of main part pipeline 3 is located to outer air outlet pipe 6, and the inside center department of main part pipeline 3 is located to the choked flow component, and inner layer foam metal pipe 2 suit has the clearance in main part pipeline 3 to and main part pipeline 3 between.

According to the utility model, the gas entering the main pipeline 3 is subjected to noise elimination and flow resistance by utilizing the flow resistance of the flow resistance element and the sound absorption performance of the inner layer foam metal pipe 2, and then is discharged out of the main pipeline 3, and the noise reduction device has a simple structure and a good noise reduction effect.

Example one

As shown in fig. 1, in the present embodiment, the flow resisting element is a tapered tube 5, and both ends of the tapered tube 5 are tapered and respectively face outward into the air duct 1 and the outward air duct 6. The conical tube 5 is made of foamed metal.

In this embodiment, the inner foamed metal pipe 2 is a foamed aluminum pipe, the foamed metal is foamed aluminum, and the main pipe 3 is a steel pipe. The foamed aluminum has excellent sound absorption performance, and is better than other types of foamed metal, and the foamed aluminum can absorb the energy of sound through the vibration of the air hole wall, so that the sound can be eliminated and the noise can be removed.

In this embodiment, the external inlet duct 1, the main body duct 3, the inner layer foam metal pipe 2, the tapered pipe 5, and the external outlet duct 6 are located on the same axis. The outer access air pipeline 1, the main pipeline 3 and the outer air outlet pipeline 6 are sequentially communicated, and the pipe diameter of the inner layer foam metal pipe 2 is larger than that of the outer access air pipeline 1 and that of the outer air outlet pipeline 6. Cross-sectional area S of inner wall of external wind inlet pipeline 1₁Cross-sectional area S of inner wall of inner layer foamed metal pipe 2₂Cross-sectional area S of outer wall of conical pipe 5₃And satisfies the relation: s₁＜S₂-S₃. The pipes of this embodiment are circular pipes, and as shown in fig. 1, the inner diameter of the external wind inlet pipe 1 is d₁The inner diameter of the inner layer foam metal pipe 2 is d₂The outside diameter of the conical tube 5 is d₃，d₁、d₂And d₃Satisfy the relation:

example two

As shown in fig. 2, the present embodiment is different from the first embodiment in that a cavity is provided inside the conical tube 5, a tube body of the conical tube 5 is made of a foamed metal, and a sound absorbing material 4 is filled in the cavity. And a sound absorption material 4 is filled between the main body pipeline 3 and the inner layer foam metal pipe 2. In this embodiment, the sound absorbing material 4 is made of glass wool. The sound absorption efficiency of the smoke exhaust muffler can be further improved by filling the sound absorption material 4. In the sound-absorbing material 4, the glass wool is a porous sound-absorbing material 4 with good sound-absorbing performance, and has light weight, fire resistance, flame retardance and stable performance. The angle between the end of the conical tube 5 and the tube body of the conical tube 5 is preferably 40 ° to 60 °, and in the present embodiment, the angle between the two is preferably 50 °.

Taking this embodiment as an example, the working principle of the present invention is explained: when the air current gets into main part pipeline 3 in from external access air pipeline 1, carry out the choked flow by the conical tube 5 of inside packing sound absorbing material 4 earlier and fall the noise to the air current, then by inlayer foam metal pipe 2 and pack the sound absorbing material 4 between main part pipeline 3 and inlayer foam metal pipe 2, carry out the sound absorption again and fall the noise to the air current, discharge through external air outlet duct 6 at last. The sound absorption efficiency of the smoke exhaust silencer is greatly improved due to the arrangement of the conical pipe 5 filled with the sound absorption material 4 inside, the inner layer foam metal pipe 2 and the sound absorption material 4 filled between the inner layer foam metal pipe 2 and the main pipeline 3.

EXAMPLE III

The difference between the present embodiment and the second embodiment is that the sound absorbing material 4 used in the present embodiment is aerogel. The aerogel is a nano-scale porous solid material formed by replacing liquid phase in gel with gas in a certain drying mode through a sol-gel method, is a solid with the minimum density in the world, and is also an ideal acoustic delay or high-temperature sound insulation material for sound absorption and noise reduction due to the low sound velocity characteristic of silicon aerogel, for example, the fiber aerogel developed in 2015 of China can efficiently absorb sound within a broad frequency range of 100-6300 Hz.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A smoke evacuation muffler, comprising: the external access air pipeline, the main pipeline, the inner layer foam metal pipe, the external air outlet pipeline and the flow resisting element for preventing air flow from passing through; the external air inlet pipeline is arranged at one end of the main pipeline, the external air outlet pipeline is arranged at the other end of the main pipeline, the flow resisting element is arranged at the center of the interior of the main pipeline, and the inner layer foam metal pipe is sleeved in the main pipeline and has a gap with the main pipeline.

2. The smoke exhaust muffler according to claim 1, wherein the flow blocking element is a tapered tube, and both ends of the tapered tube are tapered and face the external inlet duct and the external outlet duct, respectively.

3. The smoke evacuation muffler of claim 2 wherein said tapered tube is made of metal foam.

4. The smoke exhaust muffler according to claim 3 wherein said tapered tube has a cavity formed therein, said tapered tube body is made of a foamed metal, and said cavity is filled with a sound absorbing material.

5. The smoke exhaust muffler according to claim 4 wherein the body pipe and the inner layer foam metal pipe are filled with sound absorbing material.

6. The smoke exhaust muffler of claim 5 wherein said sound absorbing material is glass wool or aerogel.

7. The smoke evacuation muffler of claim 5 wherein said inner layer metal foam tube is an aluminum foam tube and said metal foam is aluminum foam.

8. The smoke exhaust muffler according to claim 4, wherein the angle between the end of the tapered tube and the tube body of the tapered tube is 40 ° to 60 °.

9. The smoke exhaust muffler according to claim 2, wherein the external inlet duct, the inner layer foam metal pipe, the conical pipe and the external outlet duct are located on the same axis.

10. A smoke exhaust muffler according to any one of claims 1 to 9 wherein the cross-sectional area of the inner wall of the external inlet duct is S₁The cross sectional area of the inner wall of the inner layer foam metal pipe is S₂The cross-sectional area of the outer wall of the conical pipe is S₃，S₁＜S₂-S₃。