CN106014542B - High pressure silencer - Google Patents
High pressure silencer Download PDFInfo
- Publication number
- CN106014542B CN106014542B CN201610342844.3A CN201610342844A CN106014542B CN 106014542 B CN106014542 B CN 106014542B CN 201610342844 A CN201610342844 A CN 201610342844A CN 106014542 B CN106014542 B CN 106014542B
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- China
- Prior art keywords
- muffler body
- muffler
- shell
- high pressure
- level
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000003584 silencer Effects 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 28
- 230000008030 elimination Effects 0.000 claims abstract description 17
- 238000003379 elimination reaction Methods 0.000 claims abstract description 17
- 229920000742 Cotton Polymers 0.000 claims description 32
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 239000000956 alloy Substances 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 238000009987 spinning Methods 0.000 claims description 4
- 238000005299 abrasion Methods 0.000 claims description 3
- 239000011358 absorbing material Substances 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 238000013016 damping Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000005354 aluminosilicate glass Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000010358 mechanical oscillation Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/082—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases passing through porous members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/16—Selection of particular materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2310/00—Selection of sound absorbing or insulating material
- F01N2310/14—Wire mesh fabric, woven glass cloth or the like
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention discloses the high pressure silencers that a kind of high pressure gas suitable for discharge carries out noise elimination noise reduction.High pressure silencer, including shell, muffler body and quieter material, shell is the cylindrical body that one end is dome head, and air inlet connecting mouth is arranged on dome head, and the shell other end is closed by the orifice plate with gas vent, the muffler body for being N grades close to dome head one end setting noise elimination series in shell, first order muffler body one end is connected with air inlet connecting mouth, is respectively set air hole on muffler bodies at different levels, and muffler bodies at different levels are cylindrical and concentric suit；Quieter material is filled between on the outside of outer casing inner wall and muffler body, wherein N >=4, and is natural number.High pressure draught enters muffler body from air inlet connecting mouth, and volume is gradually expanded, and density constantly declines, and noise gradually weakens, and the air-flow being weakened enters quieter material, is further weakened, and when air-flow reaches orifice plate, noise, which finally obtains, substantially to be weakened.The good muffling effect of high pressure silencer, structure is simple, and intensity is high, easy for installation, easy to maintain.
Description
Technical field
The present invention relates to a kind of muffler, especially a kind of high pressure gas for discharge carries out the high pressure of noise elimination noise reduction
Silencer.
Background technique
When compressed gas is directly vented, gas flow at high rates generates noise, and maximum noise is up to 120dB or more.High-decibel
The health of noise on human will cause larger harm, can even jeopardize the life security of people when serious.GB/T 189.8《China
People's republic's Occupational sanitary standard》Workplace physical factor measures the 8th part regulation：Workplace noise day is connect
Touching the contact limit that the time is 8h is 85dB (A).
The deflation evacuation procedure of compressed gas is an endothermic process, has knot frost and ice in exhaust outlet and blocks up phenomenon, initially
Pressure is higher, the dew point in air is higher, and ice is stifled more serious.So discharging gas under lower pressure, it can not consider that ice is stifled,
But under high pressure, it is necessary to consider that ice blocks up situation.In the case where considering that ice is stifled, silencer component will be born sometimes
30MPa even higher pressure, conventional muffler design pressure are generally no greater than 3MPa, and maximum sound deadening capacity is not more than 38dB (A),
It is not able to satisfy gas damping noise reduction requirement under condition of high voltage.In addition, existing muffler is usually using aluminosilicate glass cotton as filling
Material is very big to personnel and to environmental hazard.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of suitable for carrying out noise elimination noise reduction to the high pressure gas of discharge
High pressure silencer.
The technical solution adopted by the present invention to solve the technical problems is：High pressure silencer, including shell, muffler body and disappear
Sound material, the shell are the cylindrical body that one end is dome head, and air inlet connecting mouth is arranged on dome head, and the other end of shell is logical
Orifice plate closing is crossed, and gas vent is set on orifice plate；In the shell, muffler body is arranged in one end where dome head, described to disappear
The noise elimination series of sound body is N grades, and muffler body is followed successively by first order muffler body, second level muffler body from inside to outside, and the third level is eliminated the noise
Body, until N grades of muffler bodies, one end of first order muffler body is connected with air inlet connecting mouth, is respectively set on muffler bodies at different levels ventilative
Hole, muffler bodies at different levels are cylindrical and concentric suit；The noise reduction material is filled between on the outside of the inner wall and muffler body of the shell
Expect, wherein N >=4, and is natural number.
Further, one end of first muffler body is connected with air inlet connecting mouth, the other end of first order muffler body connects
Connecting bolt, the bolt pass through second level muffler body, and third level muffler body is up through N grades of muffler bodies and solid by nut
It is fixed.
Further, the quieter material is steel wire and/or acoustical cotton.
Specifically, the noise elimination series of the muffler body is level Four, and muffler body is sequentially from inside to outside first order muffler body, the
Second level muffler body, third level muffler body and fourth stage muffler body, on the outside of the inner wall and muffler body of shell between filler wire net, steel
One layer of acoustical cotton is set in silk screen, and plane where acoustical cotton is overlapped with a cross section of shell.
Muffler body, steel wire, acoustical cotton and orifice plate are set gradually in shell, when air-flow enters muffler body from air inlet connecting mouth
When, volume is gradually expanded, and density constantly declines, and noise is gradually weakened, and when the air-flow being weakened enters steel wire, is rubbed
Effect, air velocity reduce, and noise is weakened again, when into acoustical cotton, because acoustical cotton has a large amount of inside and outside connection
Micro-pore and hole, when on sound wave incident to acoustical cotton, sound wave can enter material internal along hole, cause in gap
Noise elimination noise reduction is realized in the vibration of air molecule.
Further, the shell uses damp alloy material, and integrally formed jointless structure is processed for hot spinning,
The inside and outside wall of shell is sprayed with abrasion resistant anticorrosive paint, and the inner wall of shell is filled with inorfil sound-absorbing material.
Further, the air inlet connecting mouth, muffler body, steel wire and orifice plate are all made of stainless steel material.
Specifically, the acoustical cotton uses polyester fiber cotton material.
Specifically, the orifice plate is connected by screw to one end in shell far from dome head.Convenient disassembly is conducive to disappear
The periodic replacement and plant maintenance of sound material, and high pressure silencer structure is simple, stands upside down or is horizontally mounted and all may be used.
The beneficial effects of the invention are as follows：High pressure draught enters muffler body from air inlet connecting mouth, and volume is gradually expanded, and density is continuous
Decline, noise are gradually weakened, and the air-flow being weakened enters quieter material, due to the viscosity resistance and air molecule of air and hole
The friction of gap wall, sound can be converted into thermal energy and be depleted, and noise is further weakened, and when air-flow reaches orifice plate, noise is final
Significantly weakened.
The shell of high pressure silencer use damp alloy material, damping alloy can reduce to the maximum extent mechanical noise and
Mitigate mechanical oscillation, and shell uses hot spinning integral forming process, finished product accuracy is high, good mechanical property, welds with using
Technique, which is compared, has higher intensity, in the case where complete ice blocks up situation, can bear the high pressure of 35MPa, and can prevent weld seam
Partial intercrystalline corrosion obtains longer service life.
The noise reduction mode that high pressure silencer is combined using sound-absorptive object, acoustical cotton, steel wire, this mode can increase noise reduction
Area, centering high frequency noise have good erasure effect, greatly reduce noise pollution, and noise can reduce by 40~50%, generally
For 62~72dB (A).
Detailed description of the invention
Fig. 1 is the cross-sectional view of high pressure silencer of the present invention.
Components, position and number in figure：Shell 1, air inlet connecting mouth 2, muffler body 3, first order muffler body 31, the second level disappear
Sound body 32, third level muffler body 33, fourth stage muffler body 34, bolt 35, nut 36, steel wire 4, acoustical cotton 5, orifice plate 6.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in Figure 1, high pressure silencer of the present invention, including shell 1, muffler body 3 and quieter material, shell 1 are for one end
Air inlet connecting mouth 2 is arranged on dome head for the cylindrical body of dome head, and the other end of shell 1 is closed by orifice plate 6, and on orifice plate 6
Gas vent is set.Shell 1 is preferably made of damp alloy material, and to avoid influence of the weld seam to structural strength, shell 1 is used
Hot spinning integral forming process, complete ice block up situation under, the high pressure of 35MPa can be born, can meet -40 DEG C of environment temperature~
+ 60 DEG C of requirement.The inside and outside wall of shell 1 is sprayed with abrasion resistant anticorrosive paint, is suitable for washing away and the operating conditions such as marine environment.Shell
1 inner wall is filled with inorfil sound-absorbing material, further increases erasure effect.
In shell 1, muffler body 3 is arranged in one end where dome head, and muffler body 3 is stainless steel material, avoids being corroded,
Proof strength improves service life, and the noise elimination series of muffler body 3 is N grades, wherein N >=4, and is natural number.Muffler body 3 is in
It is followed successively by first order muffler body 31, second level muffler body 32, third level muffler body 33 outward, until N grades of muffler bodies.The first order
One end of muffler body 31 and air inlet connecting mouth 2 are welded to connect, and air hole are respectively set on muffler bodies at different levels, muffler bodies at different levels are in round
Tubulose and with one heart suit.Muffler bodies at different levels are welded to connect close to dome head one end, strong between muffler bodies at different levels in order to guarantee
Degree, one end welded connections of the separate air inlet connecting mouth 2 of first order muffler body 31, connector pass through second level muffler body 32, the
Three-level muffler body 33, until N grades of muffler bodies, muffler bodies at different levels are linked together, the integral strength of muffler bodies at different levels is enhanced.
Quieter material is filled between 3 outside of inside and muffler body of shell 1, quieter material is steel wire 4 and/or acoustical cotton
5.Acoustical cotton 5 uses polyester fiber cotton material, and polyester fiber cotton material has a large amount of inside and outside micro-pore and hole being connected to,
When on sound wave incident to acoustical cotton, sound wave can enter material internal along hole, cause the vibration of air molecule in gap, make an uproar
Sound is weakened, good muffling effect, and in addition acoustical cotton is not easy to evaporate into air, is conducive to human health and environmental protection.
Specifically, as shown in Figure 1, the noise elimination series of muffler body 3 is level Four, muffler body 3 is followed successively by the first order from inside to outside
Muffler body 31, second level muffler body 32, third level muffler body 33 and fourth stage muffler body 34, one end of the first muffler body 3 with into
Gas connects mouth 2 and is connected, and the other end of first order muffler body 31 connects bolt 35, and bolt 35 passes through second level muffler body 32, the third level
Muffler body 33, it is up through N grades of muffler bodies and fixed by nut 36.It is filled between 3 outside of inside and muffler body of shell 1
Steel wire 4, steel wire 4 are stainless steel material, and one layer of acoustical cotton 5,5 place plane of acoustical cotton and shell 1 are arranged in steel wire 4
One cross section is overlapped, that is, is exactly that the boundary of acoustical cotton 5 is contacted with shell 1, steel wire 4 is divided into two parts by acoustical cotton 5.
Muffler body 3, steel wire 4, acoustical cotton 5 and orifice plate 6 are set gradually in shell 1, orifice plate 6 uses stainless steel material, hole
Plate 6 is connected by screw in the one end of shell 1 far from dome head, in order to dismantle, is conducive to the periodic replacement of quieter material
With plant maintenance.When air-flow enters muffler body 3 from air inlet connecting mouth 2, sequentially through muffler body 3, steel wire 4, acoustical cotton 5, steel wire
Net 4 is discharged finally by orifice plate 6, realizes noise elimination noise reduction.
Above-mentioned shell 1 is selected, shell 1 is the cylindrical body that one end is dome head, and air inlet connecting mouth is arranged on dome head
2, the other end of shell 1 is closed by orifice plate 6, and gas vent is arranged on orifice plate 6.Different types of disappear is respectively set in shell 1
Sound device, test result are as shown in table 1.
The contrast test result of 1 different type silencer of table
More above-mentioned test result, it is seen that the noise elimination effect of embodiment 7 and embodiment 8 is optimal.Although theoretical calculation is to disappear
The noise elimination series of sound body is more, and noise elimination area is bigger, and noise elimination effect is better, but is found according to embodiment 7 and embodiment 8, four
Grade muffler body+acoustical cotton+steel wire muffler and Pyatyi muffler body+acoustical cotton+steel wire muffler effect are essentially the same.
Since the scheme of embodiment 7 is more preferable compared with the scheme economy of embodiment 8, so the scheme of embodiment 7 is preferred embodiment.
The noise reduction mode that high pressure silencer is combined using sound-absorptive object, acoustical cotton 5, steel wire 4, this mode can increase and disappear
Sound area, centering high frequency noise have good erasure effect, greatly reduce noise pollution, and noise can reduce by 40~50%, one
As be 62~72dB (A).
Claims (8)
1. high pressure silencer, including shell (1), muffler body (3) and quieter material, the shell (1) is that one end is dome head
Cylindrical body, air inlet connecting mouth (2) are set on dome head, it is characterised in that：The other end of shell (1) is closed by orifice plate (6),
And gas vent is set on orifice plate (6)；In the shell (1), muffler body (3) are arranged in one end where dome head, the noise elimination
The noise elimination series of body (3) is N grades, and muffler body (3) is followed successively by first order muffler body (31), second level muffler body from inside to outside
(32), third level muffler body (33), until N grades of muffler bodies, one end and air inlet connecting mouth (2) phase of first order muffler body (31)
Even, the other end welded connections of first order muffler body (31), connector pass through second level muffler body (32), third level muffler body
(33), up through N grades of muffler bodies, muffler bodies at different levels are connected；Muffler bodies at different levels are welded close to dome head one end to be connected
It connects, is respectively set air hole on muffler bodies at different levels, muffler bodies at different levels are cylindrical and concentric suit；The inner wall of the shell (1)
The quieter material is filled between muffler body (3) outside, wherein N >=4, and is natural number.
2. high pressure silencer as described in claim 1, it is characterised in that：One end of the first order muffler body (31) with into
Gas connects mouth (2) and is connected, and the other end of first order muffler body (31) connects bolt (35), and the bolt (35) is eliminated the noise across the second level
Body (32), third level muffler body (33) are up through N grades of muffler bodies and fixed by nut (36).
3. high pressure silencer as claimed in claim 1 or 2, it is characterised in that：The quieter material be steel wire (4) and/or
Acoustical cotton (5).
4. high pressure silencer as claimed in claim 3, it is characterised in that：The noise elimination series of the muffler body (3) is level Four, is eliminated the noise
Body (3) is sequentially first order muffler body (31), second level muffler body (32), third level muffler body (33) and the fourth stage from inside to outside
Muffler body (34), on the outside of the inner wall and muffler body (3) of shell (1) between filler wire net (4), one layer of setting in steel wire (4)
Acoustical cotton (5), and plane where acoustical cotton (5) is overlapped with a cross section of shell (1).
5. high pressure silencer as described in claim 1, it is characterised in that：The shell (1) uses damp alloy material, and is
Hot spinning processes integrally formed jointless structure, and the inside and outside wall of shell (1) is sprayed with abrasion resistant anticorrosive paint, and the inner wall of shell (1) is filled out
Filled with inorfil sound-absorbing material.
6. high pressure silencer described in claim 1, it is characterised in that：The air inlet connecting mouth (2), muffler body (3), steel wire
(4) and orifice plate (6) is all made of stainless steel material.
7. high pressure silencer as claimed in claim 4, it is characterised in that：The acoustical cotton (5) uses polyester fiber cotton material
Material.
8. high pressure silencer as described in claim 1, it is characterised in that：The orifice plate (6) is connected by screw in shell (1)
One end far from dome head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610342844.3A CN106014542B (en) | 2016-05-20 | 2016-05-20 | High pressure silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610342844.3A CN106014542B (en) | 2016-05-20 | 2016-05-20 | High pressure silencer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106014542A CN106014542A (en) | 2016-10-12 |
| CN106014542B true CN106014542B (en) | 2018-11-23 |
Family
ID=57095552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610342844.3A Active CN106014542B (en) | 2016-05-20 | 2016-05-20 | High pressure silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106014542B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111624054B (en) * | 2020-05-12 | 2022-10-21 | 北京市医疗器械检验所 | Buffer for releasing compressed gas |
| CN113658574A (en) * | 2021-09-01 | 2021-11-16 | 江苏亚星波纹管有限公司 | Multifunctional environment-friendly energy-saving silencer |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3677300A (en) * | 1970-01-15 | 1972-07-18 | Dunlop Holdings Ltd | Pressure reducing devices |
| CN203839033U (en) * | 2014-05-16 | 2014-09-17 | 启东兴东石化设备制造有限责任公司 | Capacity expanding type resistive compound emptying muffler |
| CN203847448U (en) * | 2014-05-20 | 2014-09-24 | 安徽牧马湖农业开发集团有限公司 | Draught fan noise reduction system |
| CN203858858U (en) * | 2014-05-08 | 2014-10-01 | 无锡市华尔泰机械制造有限公司 | Throttling diffusion compound muffler |
| CN204493972U (en) * | 2015-02-09 | 2015-07-22 | 杭州杭氧换热设备有限公司 | A kind of high-pressure and high-temperature steam air releasing silencer |
| CN204512780U (en) * | 2015-03-11 | 2015-07-29 | 辽宁锦兴石油机械有限公司 | Thermal recovery oil high temperature and high pressure steam composite type silencer |
| CN204966041U (en) * | 2015-08-05 | 2016-01-13 | 杭州盛尔气体设备有限公司 | Compound low noise muffler for unloading |
-
2016
- 2016-05-20 CN CN201610342844.3A patent/CN106014542B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3677300A (en) * | 1970-01-15 | 1972-07-18 | Dunlop Holdings Ltd | Pressure reducing devices |
| CN203858858U (en) * | 2014-05-08 | 2014-10-01 | 无锡市华尔泰机械制造有限公司 | Throttling diffusion compound muffler |
| CN203839033U (en) * | 2014-05-16 | 2014-09-17 | 启东兴东石化设备制造有限责任公司 | Capacity expanding type resistive compound emptying muffler |
| CN203847448U (en) * | 2014-05-20 | 2014-09-24 | 安徽牧马湖农业开发集团有限公司 | Draught fan noise reduction system |
| CN204493972U (en) * | 2015-02-09 | 2015-07-22 | 杭州杭氧换热设备有限公司 | A kind of high-pressure and high-temperature steam air releasing silencer |
| CN204512780U (en) * | 2015-03-11 | 2015-07-29 | 辽宁锦兴石油机械有限公司 | Thermal recovery oil high temperature and high pressure steam composite type silencer |
| CN204966041U (en) * | 2015-08-05 | 2016-01-13 | 杭州盛尔气体设备有限公司 | Compound low noise muffler for unloading |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106014542A (en) | 2016-10-12 |
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