CN217712963U

CN217712963U - Noise reduction silencer

Info

Publication number: CN217712963U
Application number: CN202221278702.2U
Authority: CN
Inventors: 邓贤朝; 李龙彬; 杨仪; 雷建国
Original assignee: NEIJIANG HUAYUAN ELECTRONIC MATERIALS CO Ltd
Current assignee: NEIJIANG HUAYUAN ELECTRONIC MATERIALS CO Ltd
Priority date: 2022-05-24
Filing date: 2022-05-24
Publication date: 2022-11-01
Anticipated expiration: 2032-05-24

Abstract

The utility model discloses a noise reduction silencer, which comprises an outer shell, wherein a first non-hydrophilic sound absorption layer is arranged on the inner wall of the outer shell, one end of the outer shell is communicated with a steam-water separator, and a water outlet is arranged on the side wall of the outer shell; a silencing cylinder is fixedly arranged in the outer shell, and a non-hydrophilic second sound absorption layer is arranged in the silencing cylinder. In the utility model, the first sound absorption layer on the outer shell and the second sound absorption layer in the sound absorption column absorb sound together to reduce the noise generated when the Roots vacuum pump operates; the first sound absorption layer and the second sound absorption layer can not absorb liquid water in the nitrogen-rich gas, so that the influence of the liquid water on the first sound absorption layer and the second sound absorption layer is avoided, the first sound absorption layer and the second sound absorption layer can be ensured to permanently reduce noise, and the service life of the noise reduction silencer is prolonged; in addition, the solid waste after the glass fiber vitamins are effectively utilized, the environment is protected, and the manufacturing cost of the noise reduction silencer is reduced.

Description

Noise reduction silencer

Technical Field

The utility model relates to a noise elimination technical field, concretely relates to silencer of making an uproar falls in roots vacuum pump.

Background

The Roots vacuum pump is a variable-capacity vacuum pump which is internally provided with two blade-shaped rotors which synchronously rotate in opposite directions, and small gaps are formed among the rotors and between the rotors and the inner wall of a pump shell so as not to be in contact with each other; the Roots vacuum pump has the advantages of low cost and small investment in the pressure swing adsorption oxygen production process, is always well favored by customers, but has the defect of high noise which always troubles the customers in the industry.

At present, the roots vacuum pump falls to make an uproar and mainly adopts catch water and simple and easy silencer in the trade, and simple and easy silencer is the silencer of intussuseption glass cotton or rock wool mostly, and this kind of silencer uses after a period, and the liquid water in the nitrogen-rich gas can be absorbed to the glass cotton for noise reduction effect reduces by a wide margin.

SUMMERY OF THE UTILITY MODEL

The above-mentioned not enough to prior art, the utility model provides a silencer of making an uproar falls of long service life.

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

provided is a noise reduction muffler including:

the inner wall of the outer shell is provided with a first non-hydrophilic sound absorption layer, one end of the outer shell is communicated with the steam-water separator, and the side wall of the outer shell is provided with a water outlet;

and the silencing cylinder is fixedly arranged in the outer shell, and a non-hydrophilic second sound absorption layer is arranged in the silencing cylinder.

The beneficial effects of adopting the above technical scheme are: the first sound absorption layer on the outer shell and the second sound absorption layer in the sound absorption column absorb sound together so as to reduce noise generated during the operation of the Roots vacuum pump; the first sound absorption layer and the second sound absorption layer can not absorb liquid water in the nitrogen-rich gas, so that the influence of the liquid water on the first sound absorption layer and the second sound absorption layer is avoided, the first sound absorption layer and the second sound absorption layer can be ensured to permanently reduce noise, and the service life of the noise reduction silencer is prolonged; the water outlet is used for discharging water in the outer shell, thereby reducing the water content in the nitrogen-rich gas discharged from the outer shell.

Furthermore, conical flow deflectors are arranged at two ends of the silencing cylinder, reducer pipes matched with the conical flow deflectors are arranged at two ends of the outer shell, and the conical flow deflectors and the reducer pipes guide the flow of the nitrogen-rich gas.

Furthermore, a reinforcing rib plate is arranged outside the reducer pipe to improve the strength of the reducer pipe and reduce the influence of a steam-water mixture discharged by the Roots vacuum pump on the reducer pipe.

Furthermore, porous sound absorption plates are arranged on the inner wall of the outer shell and in the sound absorption column body; the sound absorption column and the outer shell absorb sound through the porous sound absorption plate; the sound waves enter the holes in the porous sound absorption plate and have friction with the porous sound absorption plate, so that the sound energy is converted into heat energy.

Furthermore, a plurality of support rods are fixedly arranged in the silencing cylinder, and two ends of the support rods are fixedly arranged on the inner wall of the outer shell, so that the silencing cylinder is fixedly arranged in the outer shell.

Furthermore, a supporting base is arranged at the lower end of the outer shell, so that the outer shell is prevented from being in direct contact with a mounting surface, and the abrasion of the outer shell is reduced; the lower extreme that supports the base is provided with the bumper shock absorber to reduce the influence of vibration to the outer casing, in order to improve the life of shell body.

Further, the both ends of shell body all are provided with the flange that is used for with the pipe connection, conveniently communicate with catch water through pipeline.

Drawings

FIG. 1 is a schematic view of a noise reduction muffler;

the sound absorption structure comprises a pipeline 1, a pipeline 2, a flange 3, a reinforcing rib plate 4, a reducer pipe 5, a first sound absorption layer 6, a porous sound absorption plate 7, a support rod 8, a second sound absorption layer 9, a water outlet 10, an outer shell 11, a support base 12, a conical flow guide body 13 and a sound absorption column.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes may be made apparent to those skilled in the art within the spirit and scope of the present invention as defined and defined by the appended claims.

As shown in fig. 1, the present scheme provides a noise reduction muffler, which includes:

a first non-hydrophilic sound absorption layer 5 is arranged on the inner wall of the outer shell 10, one end of the outer shell is communicated with the steam-water separator, and the lower end of the side wall of the outer shell is provided with a water outlet 9; wherein, the steam-water separator is connected with the outlet end of the Roots vacuum pump;

and the silencing cylinder 13 is fixedly arranged in the outer shell 10, is internally provided with a non-hydrophilic second sound absorption layer 8, is coaxially arranged with the outer shell 10, and has an outer diameter smaller than the inner diameter of the outer shell 10.

The first sound absorption layer 5 and the second sound absorption layer 8 can be made of waste machine head yarns in a winding process, the sound absorption effect is good, the first sound absorption layer and the second sound absorption layer are not hydrophilic, the sound absorption effect cannot be reduced due to the fact that moisture in the nitrogen-rich gas is absorbed, solid waste after the glass fiber vitamins are effectively utilized, the environment is protected, and the manufacturing cost of the noise reduction silencer is reduced; the outer shell 10 can be made of Q235 steel, and the sound attenuation cylinder 13 can be made of 304 stainless steel; asphalt paint is painted inside the outer casing 10.

The first sound absorption layer 5 on the outer shell 10 and the second sound absorption layer 8 in the sound absorption cylinder 13 absorb sound together so as to reduce the noise generated when the roots vacuum pump operates; the first sound absorption layer 5 and the second sound absorption layer 8 can not absorb liquid water in the nitrogen-rich gas, so that the influence of the liquid water on the sound absorption layers is avoided, the first sound absorption layer 5 and the second sound absorption layer 8 can permanently reduce noise, and the service life of the noise reduction silencer is prolonged; the water outlet 9 is communicated with the water tank and is used for discharging water in the outer shell 10 into the water tank, and the nitrogen-rich gas is discharged from the reducer pipe 4 at one end far away from the steam-water separator, so that the water content in the nitrogen-rich gas discharged from the outer shell 10 is reduced, and the water in the outer shell 10 is recycled.

When the scheme is implemented, the two ends of the preferable silencing column body 13 are both provided with the conical flow deflectors 12, the two ends of the outer shell 10 are both provided with the reducer pipes 4 matched with the conical flow deflectors 12, and the conical flow deflectors 12 and the reducer pipes 4 guide the flow of the nitrogen-rich gas; the conical diversion body 12 can be made of 304 stainless steel to improve corrosion resistance and avoid the influence of water in the nitrogen-rich gas.

In an embodiment of the utility model, the external deep floor 3 that is provided with of reducing pipe 4 to improve the intensity of reducing pipe 4 department, reduce roots vacuum pump exhaust steam-water mixture to reducing pipe 4's influence.

During design, the inner wall of the shell 10 and the silencing cylinder 13 are preferably provided with the porous sound absorption plate 6; the sound-absorbing cylinder 13 and the outer shell 10 absorb sound through the porous sound-absorbing plate 6; the sound waves enter the holes in the porous sound absorption plate 6 and have friction with the porous sound absorption plate 6, so that the sound energy is converted into heat energy; wherein, the porous sound absorption plate 6 can adopt 304 stainless steel to improve the corrosion resistant effect and avoid the influence of water in the nitrogen-rich gas.

In the implementation, the sound-deadening cylinder 13 is preferably fixedly provided with a plurality of support rods 7 inside, and two ends of the plurality of support rods 7 are fixedly arranged on the inner wall of the outer shell 10, so that the sound-deadening cylinder 13 is fixedly arranged in the outer shell 10; the support rod 7 is made of a hot-dip galvanized pipe, asphalt paint is coated outside the support rod 7, and the support rod 7 is welded with the noise elimination cylinder 13 and the outer shell 10.

In an embodiment of the present invention, the lower end of the outer shell 10 is provided with a supporting base 11, which avoids the outer shell 10 from directly contacting with the mounting surface, so as to reduce the abrasion of the outer shell 10; the lower end of the support base 11 is provided with a damper to reduce the influence of vibration on the outer case 10, so as to improve the service life of the outer case 10.

During design, both ends of the outer shell 10 are preferably provided with flanges 2 for connecting with the pipeline 1.

In conclusion, the first sound absorption layer 5 and the second sound absorption layer 8 in the scheme are not influenced by liquid water, so that the first sound absorption layer 5 and the second sound absorption layer 8 can reduce noise for a long time, and the service life of the noise reduction silencer is prolonged; in addition, the solid waste after the glass fiber is recycled is effectively utilized, the environment is protected, and the manufacturing cost of the noise reduction silencer is reduced.

Claims

1. A noise reducing muffler, comprising:

a first non-hydrophilic sound absorption layer (5) is arranged on the inner wall of the outer shell (10), one end of the outer shell is communicated with the steam-water separator, and a water outlet (9) is formed in the side wall of the outer shell;

and the silencing column (13) is fixedly arranged in the outer shell (10), and a non-hydrophilic second sound absorption layer (8) is arranged in the silencing column.

2. The noise reduction muffler according to claim 1, wherein the noise reduction cylinder (13) is provided with a conical flow guide body (12) at both ends thereof, and the outer shell (10) is provided with a reducer pipe (4) matching the conical flow guide body (12) at both ends thereof.

3. The noise reduction muffler according to claim 2, wherein a reinforcing rib plate (3) is arranged outside the reducer pipe (4).

4. A noise-reducing muffler according to claim 1, characterized in that a porous sound-absorbing plate (6) is provided both in the inner wall of the outer shell (10) and in the sound-reducing cylinder (13).

5. The noise reduction muffler according to claim 1, wherein a plurality of support rods (7) are fixedly arranged in the noise reduction cylinder (13), and both ends of the plurality of support rods (7) are fixedly arranged on the inner wall of the outer shell (10).

6. A noise-reducing muffler according to claim 1, wherein the lower end of the outer shell (10) is provided with a support base (11), and the lower end of the support base (11) is provided with a shock absorber.

7. Noise reduction muffler according to claim 1, characterized in that both ends of the outer shell (10) are provided with flanges (2) for connection with a pipe (1).