CN201054244Y - A spray resistance muffler - Google Patents
A spray resistance muffler Download PDFInfo
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- CN201054244Y CN201054244Y CNU2007200391570U CN200720039157U CN201054244Y CN 201054244 Y CN201054244 Y CN 201054244Y CN U2007200391570 U CNU2007200391570 U CN U2007200391570U CN 200720039157 U CN200720039157 U CN 200720039157U CN 201054244 Y CN201054244 Y CN 201054244Y
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- sound
- sound absorbing
- inner cover
- acoustic resistance
- muffler
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Abstract
The utility model relates to an anti-spray resistance muffler, which is characterized in that the muffler comprises a flow controlling tube, the top end of which is sealed, a sound absorbing inner cover and a sound absorbing outer cover are arranged in sequence on the flow controlling tube; both the upper bottom surface and the lower bottom surface of the sound absorbing inner cover are arranged in a sealing way, the side wall of the sound absorbing inner cover is composed of an internal acoustic resistance body, an external acoustic resistance body and a first sound absorbing material layer arranged between the internal acoustic resistance body and the external acoustic resistance body, and a jetting hole is arranged on the flow controlling tube arranged in the sound absorbing inner cover; the sound absorbing outer cover comprises a casing body, an air exhaust opening arranged at the top part of the casing body, an exhaust opening arranged at the lower part, a second sound absorbing material layer arranged on the inner wall of the casing body, and a two time acoustic resistance body arranged on the second sound absorbing material layer; the jetting hole is respectively arranged in the internal acoustic resistance body, the external acoustic resistance body and the two time acoustic resistance body. The utility model combines the design concepts of a resistant muffler, a resistive muffler and a small-hole jetting muffler, and the total noise elimination quantity of the utility model can reach 39 to 52 decibel. The utility model is suitable for eliminating the air exhausting noise of various power station boilers, industrial boilers, reheaters, overheaters, starting up separators, safety valves, etc.
Description
Technical field
The utility model relates to a kind of sound suppressor, particularly a kind of anti-spray resistance sound suppressor of controlling the commercial unit noise.
Background technology
Noise pollution is the environmental problem that the world today generally acknowledges.From the 1950's, industrial fast development, noise pollution is serious day by day.In today that the industrialization competition is growing more intense, each noise like appears in industrial sectors such as power station, chemical industry, metallurgy, communications and transportation etc. in succession, and harm people's health influences work efficiency, and almost everybody is subjected to The noise.Sound suppressor is the important channel of control commercial unit noise.
In the prior art, sound suppressor can be divided into dissipative muffler, reactive muffler and micropore jet sound suppressor according to its noise-cancelling theory.Dissipative muffler is a kind of absorption-type sound suppressor, and it is when utilizing sound wave to propagate in porous sound-absorbing material, because of friction is converted into heat energy with acoustic energy and dissipates, thereby reaches the purpose of noise elimination.In general, dissipative muffler has good medium-high frequency acoustic attenuation performance, and is relatively poor to the low frequency acoustic attenuation performance.Reactive muffler is different with dissipative muffler, it does not use acoustic absorbant, the reflection, interference and the resonance sound-absorbing that produce acoustic energy but the sudden change of dependence pipeline section or connection resonant cavity etc. cause the change of impedance in the acoustic propagation process reduce sound suppressor to extraradial acoustic energy, reach the noise elimination purpose.From energy point of view, dissipative muffler adopts is that the method for energy conversion (converting acoustic energy to heat energy by acting) reduces the acoustic energy in sound suppressor exit, and the method that reactive muffler mainly utilizes acoustic energy to shift reduces the acoustic energy in sound suppressor exit.Except that having the broadband acoustic characteristics, its selectivity is stronger, is applicable to narrow band noise and medium and low frequency Noise Control in this class sound suppressor, relatively is suitable for, cleanliness factor demanding place use big in high temperature, humidity, gas velocity.The micropore jet sound suppressor be a kind of diameter the hush tube of endcapped has a lot of exhaust holes on its tube wall with former exhausr port is identical, the total area of aperture generally should be greater than former exhaust port area, hole diameter is more little, the effect that reduces exhaust noise is also good more.The micropore jet sound suppressor replaces the heavy in section spout with many little spouts, and it is applicable to the emptying exhaust noise that flow velocity is high.The principle of micropore jet sound suppressor is the interference noise that reduces it from sound generating mechanism.Jet noise crest frequency and nozzle diameter are inversely proportional to, i.e. the noise energy of spout radiation will be shifted to high frequency from low frequency along with diminishing of nozzle diameter.Arrive to a certain degree if the aperture is little, jet noise will move on to the insensitive frequency range of people's ear.According to this principle, use a big spout instead many apertures and replace, under the condition that keeps same row tolerance, just can reach the purpose that reduces audible sound.
Be inhibition high pressure steam flow displacement noise, the domestic and international at present exhaust box that has had various ways, its principle adopts the multi-level throttle step-down mostly, because its complex structure, weight is difficult to greatly disintegrate and overhauls, thereby has limited its range of application.
Summary of the invention
Technical problem to be solved in the utility model is at the deficiencies in the prior art, and the anti-preferably spray resistance of a kind of simple and reasonable, applied range, noise elimination effect sound suppressor is provided.
Technical problem to be solved in the utility model is to realize by following technical scheme.The utility model is a kind of anti-spray resistance sound suppressor, is characterized in, it comprises the control stream pipe of top closure, is provided with sound absorption inner cover and sound absorption outer cover on control stream pipe successively; The last bottom surface of described sound absorption inner cover all adopts closed-loop layout, the sidewall of sound absorption inner cover by internal resistance sound body, extrernal resistance sound body and be located at internal resistance sound body with extrernal resistance sound body between first sound-absorbing material layer constitute, be in the control of sound absorption in the inner cover and flow pipe and be provided with spray orifice; Described sound absorption outer cover comprises housing, and the top of housing is provided with exhausr port, the bottom is provided with floss hole, is provided with second sound-absorbing material layer on inner walls, is provided with secondary resistance sound body on second sound-absorbing material layer; Be equipped with spray orifice on described internal resistance sound body, extrernal resistance sound body and the secondary resistance sound body.
Technical problem to be solved in the utility model can also further realize by following technical scheme.Above-described a kind of anti-spray resistance sound suppressor is characterized in, also is provided with the installation hanger on housing.
Technical problem to be solved in the utility model can also further realize by following technical scheme.Above-described a kind of anti-spray resistance sound suppressor is characterized in, also is provided with the installation support member on housing.
Technical problem to be solved in the utility model can also further realize by following technical scheme.Above-described a kind of anti-spray resistance sound suppressor is characterized in that described sound absorption inner cover and sound absorption outer cover are cylindrical structure.
Technical problem to be solved in the utility model can also further realize by following technical scheme.Above-described a kind of anti-spray resistance sound suppressor is characterized in that the height of described housing is 1～3m.
Technical problem to be solved in the utility model can also further realize by following technical scheme.Above-described a kind of anti-spray resistance sound suppressor is characterized in that the overall diameter of described housing is 57～2000mm.
The anti-spray resistance of the utility model sound suppressor is a kind of complex muffler that combines the design concept of resistance, resistive, micropore jet type sound suppressor and design.Its sound-absorbing material layer can adopt XB350 inorganic fibre acoustic absorbant, can adapt to high temperature, humidity, in the particular surroundings such as the gas that is corrosive.
Installation of the present utility model and principle of work are as follows: the control stream pipe of the utility model sound suppressor is connected with the gas outlet that needs to eliminate the noise.During use, the work medium is keeping under the same row situation high-volume, sound source is shifted to high frequency from low frequency after the spray of control stream pipe, through the internal resistance sound body bulk sudden change of sound absorption inner cover, has formed low-pressure fluid after the big volume dilatation step-down and has passed from the spray orifice of first sound-absorbing material layer and extrernal resistance sound body then again; The considerable part in the energy changes into the acoustic energy of various frequencies in the air-flow in the ejection process, i.e. unheard ultrahigh frequency of people's ear and medium and low frequency sound wave, and the noise of all the other frequencies also forms residual noise to airborne release because of the reduction of power.In addition, second sound-absorbing material layer of described sound absorption outer cover is based on sound absorption, when the space outside the air-flow of the spray orifice of extrernal resistance sound body ejection enters the sound absorption inner cover and absorbs sound between the acoustic shell is up, has certain temperature difference because of between two surfaces, sound wave will be to low-temperature receiver---sound absorption housing case direction, flexural acoustic wave enters second sound-absorbing material layer by the spray orifice of the second resistance sound body, and the acoustical power of considerable part is absorbed therein, can play effective sound insulation effect.After using the utility model, its total sound deadening capacity can reach 39～52 decibels (A).
The utility model mainly is applicable to the exhaust noise of all kinds of station boilers, Industrial Boiler, reheater, superheater, startup separation vessel and the safety valve etc. that reduce various parameters, also be applicable to the discharging or the emptying noise of the process gas of the equipment such as head tank, thrower, chemical reactor of industrial sectors such as reducing chemical industry, metallurgy, communications and transportation and container, also applicable to the washing pipe noise that reduces each industrial sector and R﹠D institution's pipeline.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Embodiment 1.With reference to Fig. 1.A kind of anti-spray resistance sound suppressor, it comprises the control stream pipe 11 of top closure, is provided with sound absorption inner cover 10 and sound absorption outer cover 14 on control stream pipe 11 successively; The last bottom surface of described sound absorption inner cover 10 all adopts closed-loop layout, the sidewall of sound absorption inner cover 10 by internal resistance sound body 9, extrernal resistance sound body 6 and be located at internal resistance sound body 9 with extrernal resistance sound body 6 between first sound-absorbing material layer 7 constitute, be in the control stream of sound absorption in the inner cover 10 and manage 11 and be provided with spray orifice 13; Described sound absorption outer cover 14 comprises housing 3, and the top of housing 3 is provided with exhausr port 1, the bottom is provided with floss hole 12, is provided with second sound-absorbing material layer 4 on housing 3 inwalls, is provided with secondary resistance sound body 5 on second sound-absorbing material layer 4; Be equipped with spray orifice 13 on described internal resistance sound body 9, extrernal resistance sound body 6 and the secondary resistance sound body 5.
Embodiment 2.In embodiment 1, on housing 3, also be provided with hanger 2 is installed.
Embodiment 3.In embodiment 1, on housing 3, also be provided with support member 8 is installed.
Embodiment 4.Sound absorption inner cover 10 described in the embodiment 1 and sound absorption outer cover 14 are cylindrical structure.
Embodiment 5.Sound absorption inner cover 10 described in the embodiment 1 and sound absorption outer cover 14 are the square body structure.
Embodiment 6.In embodiment 1, the height of described housing 3 is 1m; The overall diameter of described housing 3 is 57mm.
Embodiment 7.In embodiment 1, the height of described housing 3 is 3m; The overall diameter of described housing 3 is 2000mm.
Embodiment 8.With reference to Fig. 1.A kind of anti-spray resistance sound suppressor, it comprises the control stream pipe 11 of top closure, is provided with sound absorption inner cover 10 and sound absorption outer cover 14 on control stream pipe 11 successively; The last bottom surface of described sound absorption inner cover 10 all adopts closed-loop layout, the sidewall of sound absorption inner cover 10 by internal resistance sound body 9, extrernal resistance sound body 6 and be located at internal resistance sound body 9 with extrernal resistance sound body 6 between first sound-absorbing material layer 7 constitute, be in the control stream of sound absorption in the inner cover 10 and manage 11 and be provided with spray orifice 13; Described sound absorption outer cover 14 comprises housing 3, and the top of housing 3 is provided with exhausr port 1, the bottom is provided with floss hole 12, is provided with second sound-absorbing material layer 4 on housing 3 inwalls, is provided with secondary resistance sound body 5 on second sound-absorbing material layer 4; Be equipped with spray orifice 13 on described internal resistance sound body 9, extrernal resistance sound body 6 and the secondary resistance sound body 5; On housing 3, also be provided with and hanger 2 be installed and support member 8 is installed; Described sound absorption inner cover 10 and sound absorption outer cover 14 are cylindrical structure; The height of described housing 3 is 2m; The overall diameter of described housing 3 is 1000mm.
Claims (6)
1. an anti-spray resistance sound suppressor is characterized in that it comprises the control stream pipe (11) of top closure, is provided with sound absorption inner cover (10) and sound absorption outer cover (14) on control stream pipe (11) successively; The last bottom surface of described sound absorption inner cover (10) all adopts closed-loop layout, the sidewall of sound absorption inner cover (10) by internal resistance sound body (9), extrernal resistance sound body (6) and be located at internal resistance sound body (9) with extrernal resistance sound body (6) between first sound-absorbing material layer (7) constitute, be in control stream in the sound absorption inner cover (10) and manage (11) and be provided with spray orifice (13); Described sound absorption outer cover (14) comprises housing (3), the top of housing (3) is provided with exhausr port (1), the bottom is provided with floss hole (12), on housing (3) inwall, be provided with second sound-absorbing material layer (4), on second sound-absorbing material layer (4), be provided with secondary resistance sound body (5); Be equipped with spray orifice (13) on described internal resistance sound body (9), extrernal resistance sound body (6) and the secondary resistance sound body (5).
2. a kind of anti-spray resistance sound suppressor according to claim 1 is characterized in that, also is provided with on housing (3) hanger (2) is installed.
3. a kind of anti-spray resistance sound suppressor according to claim 1 is characterized in that, also is provided with on housing (3) support member (8) is installed.
4. a kind of anti-spray resistance sound suppressor according to claim 1 is characterized in that described sound absorption inner cover (10) and sound absorption outer cover (14) are cylindrical structure.
5. a kind of anti-spray resistance sound suppressor according to claim 1 is characterized in that the height of described housing (3) is 1～3m.
6. a kind of anti-spray resistance sound suppressor according to claim 1 is characterized in that the overall diameter of described housing (3) is 57～2000mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200391570U CN201054244Y (en) | 2007-05-25 | 2007-05-25 | A spray resistance muffler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200391570U CN201054244Y (en) | 2007-05-25 | 2007-05-25 | A spray resistance muffler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201054244Y true CN201054244Y (en) | 2008-04-30 |
Family
ID=39393906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200391570U Expired - Fee Related CN201054244Y (en) | 2007-05-25 | 2007-05-25 | A spray resistance muffler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201054244Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114283771A (en) * | 2021-12-31 | 2022-04-05 | 中国航空工业集团公司西安飞机设计研究所 | Combined silencer suitable for high-temperature and high-pressure gas emission |
-
2007
- 2007-05-25 CN CNU2007200391570U patent/CN201054244Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114283771A (en) * | 2021-12-31 | 2022-04-05 | 中国航空工业集团公司西安飞机设计研究所 | Combined silencer suitable for high-temperature and high-pressure gas emission |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080430 Termination date: 20120525 |