CN110017266B - Pneumatic muffler - Google Patents

Pneumatic muffler Download PDF

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Publication number
CN110017266B
CN110017266B CN201910271503.5A CN201910271503A CN110017266B CN 110017266 B CN110017266 B CN 110017266B CN 201910271503 A CN201910271503 A CN 201910271503A CN 110017266 B CN110017266 B CN 110017266B
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CN
China
Prior art keywords
sound
air guide
absorbing
circular plate
end surface
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Active
Application number
CN201910271503.5A
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Chinese (zh)
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CN110017266A (en
Inventor
郑乘风
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rui'an Ledeng Automotive Parts Co ltd
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Rui'an Ledeng Automotive Parts Co ltd
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Application filed by Rui'an Ledeng Automotive Parts Co ltd filed Critical Rui'an Ledeng Automotive Parts Co ltd
Priority to CN201910271503.5A priority Critical patent/CN110017266B/en
Publication of CN110017266A publication Critical patent/CN110017266A/en
Application granted granted Critical
Publication of CN110017266B publication Critical patent/CN110017266B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/001Noise damping
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00Machines, pumps, or pumping installations having flexible working members
    • F04B43/02Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06Pumps having fluid drive

Abstract

The invention discloses a pneumatic silencer, which belongs to the field of pneumatic diaphragm pump accessories and comprises a cylinder body and an outer cover, wherein an air inlet is formed in the upper end surface of the outer cover, a sound absorbing cylinder is fixedly connected to the inner wall surface of the cylinder body, a sealing cover is fixedly connected to the lower surface of the cylinder body, air leakage ports are formed in the outer surfaces of the cylinder body and the sound absorbing cylinder, an I-shaped sound absorbing circular plate and a sound absorbing circular plate are fixedly connected to the inner end surfaces of the upper side and the lower side of the sound absorbing cylinder, a large opening is formed in the inner side surface of the center of the I-shaped sound absorbing circular plate, a first air guide large opening is formed in the outer surface of the upper end of the I-shaped sound absorbing circular plate, a first air guide small opening is formed in the lower end surface of the I-shaped sound absorbing circular plate, a second air guide small opening is formed in the outer surface of the center of the sound absorbing circular plate, a second air guide large opening is formed in the outer end surface of the sound absorbing circular plate, and the sound absorbing circular plate is convenient to replace.

Description

Pneumatic muffler
Technical Field
The invention relates to the field of pneumatic diaphragm pump accessories, in particular to a pneumatic muffler.
Background
The pneumatic diaphragm pump is a novel conveying machine, adopts compressed air as a power source, and can pump and exhaust various corrosive liquids, liquid with particles, high-viscosity, volatile, inflammable and extremely toxic liquids;
the exhaust port of the pneumatic diaphragm pump can generate larger vibration and noise during operation due to larger exhaust pressure, so that the special silencer is required to be installed at the exhaust port to reduce noise, the existing silencer cannot be good in multiple variable when the airflow passes through during noise reduction, the noise reduction performance is weak, the existing silencer is more integral, the air inlet of the silencer is connected to the exhaust port of the pneumatic diaphragm pump through threads during installation, and the silencer is required to be completely detached for replacement during replacement, so that the pneumatic diaphragm pump is quite inconvenient.
Disclosure of Invention
1. Technical problem to be solved
The invention aims to solve the problems in the prior art and provide a pneumatic muffler, wherein an I-shaped sound-absorbing circular plate and a sound-absorbing circular plate are additionally arranged in a sound-absorbing cylinder, a plurality of openings with the same size are distributed on the surface of the sound-absorbing circular plate, multiple variables can be carried out when air flows, the noise elimination effect is improved, the muffler is installed on an outer cover integrally through a clamping structure by adopting a sectional design, and when the muffler is replaced, only a cylinder body part is required to be detached, and the outer cover is further connected to an exhaust port, so that the muffler is convenient to replace and use.
2. Technical proposal
In order to solve the problems, the invention adopts the following technical scheme.
The utility model provides a pneumatic silencer, includes barrel, enclosing cover, the upper end surface of enclosing cover is equipped with the air inlet, the inner wall surface fixedly connected with of barrel inhales the sound drum, the lower fixed surface of barrel even has sealed lid, barrel and the surface of inhaling the sound drum are equipped with the gas vent, the equal fixedly connected with worker shape of the inner surface of the upside of inhaling the sound drum inhale the sound plectane and inhale the sound plectane, the center department inboard surface of the worker shape inhale the sound plectane is equipped with big opening, the upper end surface of worker shape inhale the sound plectane is equipped with first air guide big opening, the lower extreme surface of worker shape inhale the sound plectane is equipped with first air guide little opening, first air guide big opening and first air guide little opening evenly distributed inhale the upper end and the lower extreme surface of worker shape inhale the sound plectane, the center department surface of inhaling the sound plectane is equipped with the second air guide big opening, through inhaling the sound plectane and establishing worker shape plectane in the processing, inhale the sound, the sound plectane has the opening of a plurality of big and small opening in its surface distribution, can carry out the variable when the air flow through the segmentation noise elimination, improves, and installs the cover outside the whole through adopting the clip structure to install and change in the whole at the time of the enclosing cover, the cover is convenient for change.
Further, the second air guide small openings and the second air guide large openings are uniformly distributed on the surface of the sound-absorbing circular plate.
Further, the upper end surface fixedly connected with circle concave block of sealed lid, circle concave block adopts soft sponge material, can collide sealed lid when the air current reaches the bottom, will produce sound at this moment, adds the circle concave block of establishing the sponge material and can carry out the air current ring and dash, carries out amortization, improves the amortization performance.
Furthermore, the sound-absorbing cylinder is made of polyester fiber sound-absorbing materials, and the I-shaped sound-absorbing circular plate and the sound-absorbing circular plate are made of polyester fiber sound-absorbing materials, so that the sound-absorbing cylinder has good sound absorption performance and good sound-absorbing performance.
Further, the inner end surfaces of the front side and the rear side of the outer cover are connected with a clamping block and a spring in a sliding way through a sliding groove,
further, the inner end surface of the spring is pressed on the outer end surface of the clamping block.
Further, the inner end surface of the clamping block is connected to the front side and the rear side inner side surface of the upper end of the cylinder body in a sliding mode through the clamping groove, the cylinder body is clamped into the outer cover during installation, the clamping block is driven to bounce through the spring, the clamping block can be fast clamped into the clamping groove of the cylinder body, the cylinder body can be fixed, the whole muffler is convenient to install and fix, and the muffler is convenient to use.
Further, the outer surface center department fixedly connected with of fixture block draws the round pin, and the spring housing is at the round pin surface of drawing, and the surface fixed connection of drawing the round pin has the pull head, is convenient for pull the round pin outward slip through the pull head, can drive the fixture block outward slip and leave the draw-in groove, can dismantle the silencer main part fast, convenient to use.
3. Advantageous effects
Compared with the prior art, the invention has the advantages that:
(1) Through establishing the shape in inhaling the sound drum and inhale the sound plectane with inhale the sound plectane, have a plurality of big equidimension openings at its surface distribution, can carry out a lot of variable when the air current flows through, improve the noise elimination effect, through adopting sectional type design, install the silencer wholly on the outer cover through the joint structure, when changing, only need pull down barrel part, the enclosing cover still is connected on the gas vent, is convenient for change and uses.
(2) When the air flow reaches the bottom, the sealing cover can be collided, sound can be generated at the moment, and the circular concave blocks made of sponge materials can be added for carrying out air flow annular flushing, so that noise reduction is carried out, and the noise reduction performance is improved.
(3) The sound-absorbing cylinder is made of polyester fiber sound-absorbing materials, and the I-shaped sound-absorbing circular plate and the sound-absorbing circular plate are made of polyester fiber sound-absorbing materials, so that the sound-absorbing cylinder has good sound-absorbing property and good sound-absorbing performance.
(4) When the muffler is installed, the cylinder body is clamped into the outer cover, the clamping block is driven to bounce through the spring, the clamping block can be fast clamped into the clamping groove of the cylinder body, the cylinder body can be fixed, the whole muffler is convenient to install and fix, and the muffler is convenient to use.
(5) The pull pin is convenient to pull through the pull head to slide outwards, the clamping block can be driven to slide outwards to leave the clamping groove, and the muffler main body can be rapidly detached, so that the muffler is convenient to use.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of a part of the structure of the I-shaped sound absorbing circular plate of the invention;
FIG. 3 is a schematic view of a part of the sound absorbing circular plate according to the present invention;
fig. 4 is an enlarged view at a of the present invention.
The reference numerals in the figures illustrate:
1 barrel, 2 enclosing cover, 3 air inlets, 4 sealed covers, 5 inhale the sound drum, 6 gas leakage mouth, 7 worker shape inhale the sound round plate, 8 inhale the sound round plate, 9 big openings, 10 first air guide big openings, 11 first air guide little openings, 12 second air guide little openings, 13 second air guide big openings, 14 round concave blocks, 15 spout, 16 fixture blocks, 17 springs, 18 pull pins, 19 draw-in grooves, 20 pull heads.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention; it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present invention are within the protection scope of the present invention.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1:
1. referring to fig. 1-4, a pneumatic muffler comprises a cylinder body 1 and an outer cover 2, wherein an air inlet 3 is formed in the upper end surface of the outer cover 2, a sound absorbing cylinder 5 is fixedly connected to the inner wall surface of the cylinder body 1, a sealing cover 4 is fixedly connected to the lower surface of the cylinder body 1, an air leakage port 6 is formed in the outer surfaces of the cylinder body 1 and the sound absorbing cylinder 5, an I-shaped sound absorbing circular plate 7 and a sound absorbing circular plate 8 are fixedly connected to the inner end surfaces of the upper side and the lower side of the sound absorbing cylinder 5, a large opening 9 is formed in the inner side surface of the center of the I-shaped sound absorbing circular plate 7, a first air guide large opening 10 is formed in the outer surface of the upper end of the I-shaped sound absorbing circular plate 7, first air guide small openings 11 are uniformly distributed on the upper end surface and the lower end surface of the I-shaped sound absorbing circular plate 7, a second air guide small opening 12 is formed in the outer surface of the center of the sound absorbing circular plate 8, a second air guide large opening 13 is formed in the outer end surface of the circular plate 8, and the second air guide small openings 12 and the second air guide large openings 13 are uniformly distributed on the surface of the sound absorbing 8.
Referring to fig. 1-3, the upper end surface of the sealing cover 4 is fixedly connected with a circular concave block 14, the circular concave block 14 is made of soft sponge material, and can collide with the sealing cover 4 when the air flow reaches the bottom, sound is generated at this time, the circular concave block 14 made of sponge material can be added to perform air flow annular punching to perform noise reduction, so that the noise reduction performance is improved, the sound-absorbing cylinder 5 is made of polyester fiber sound-absorbing material, the I-shaped sound-absorbing circular plate 7 and the sound-absorbing circular plate 8 are made of polyester fiber sound-absorbing material, and the sound-absorbing circular plate has good sound-absorbing performance and good noise-reducing performance.
Referring to fig. 1 and 4, the inner end surfaces of the front and rear sides of the outer cover 2 are slidably connected with a clamping block 16 and a spring 17 through a sliding groove 15, the inner end surface of the spring 17 is extruded on the outer end surface of the clamping block 16, the inner end surface of the clamping block 16 is slidably connected with the inner side surface of the front and rear sides of the upper end of the cylinder body 1 through a clamping groove 19, when the muffler is installed, the cylinder body 1 is clamped into the outer cover 2, the clamping block 16 is driven to bounce through the spring 17, the clamping block 16 can be fast clamped into the clamping groove 19 of the cylinder body 1, the cylinder body 1 can be fixed, the installation and fixation of the muffler are convenient, the use are convenient, a pull pin 18 is fixedly connected to the center of the outer surface of the clamping block 16, the spring 17 is sleeved on the outer surface of the pull pin 18, a pull head 20 is fixedly connected with the outer surface of the pull pin 18, the pull pin 18 is convenient to pull the pull pin 18 outwards through the pull head 20, and the outer side of the clamping block 16 can be driven to slide away from the clamping groove 19, and the muffler main body can be fast detached, and the use is convenient.
When the novel sound absorbing cylinder is used, air enters through the air inlet 3, is discharged through the first air guide big opening 10 at the upper end of the I-shaped sound absorbing circular plate 7, is discharged through the first air guide small opening 11 at the lower end, the air flow is discharged from small to large and from large to small for the first time, and simultaneously reaches the position of the sound absorbing circular plate 8 through the big opening 9 at the center, is discharged through the second air guide small opening 12 and the second air guide big opening 13, is discharged from the small to large and from large to small for the second time, continuously variable in downward discharge, is discharged through the air leakage opening 6 at the same time, can collide with the sealing cover 4 when the air flow reaches the bottom, and then generates sound, the circular concave block 14 made of sponge material can be used for carrying out air flow annular flushing to carry out sound absorbing, so that sound absorbing performance is improved, the material of the sound absorbing cylinder 5 is polyester fiber sound absorbing material, the I-shaped circular plate 7 and the circular plate 8 also adopt the polyester fiber sound absorbing material, so that the novel sound absorbing cylinder has good sound absorbing performance, and can have good sound absorbing performance, and improve the sound absorbing performance, and when being installed, the novel sound absorbing cylinder 1 is clamped into the outer cover 2, the novel sound absorbing cylinder 16 is driven by the spring 17, the clamping block 16 can be quickly pulled out, and the novel sound absorbing cylinder can be conveniently replaced by the novel sound absorbing cylinder 1, and the novel sound absorbing cylinder can be quickly and conveniently replaced by the novel sound absorbing cylinder 1, and the novel sound absorbing cylinder, and the novel sound cylinder is conveniently and the cylinder.
The above description is only of the preferred embodiments of the present invention; the scope of the invention is not limited in this respect. Any person skilled in the art, within the technical scope of the present disclosure, may apply to the present invention, and the technical solution and the improvement thereof are all covered by the protection scope of the present invention.

Claims (7)

1. The utility model provides a pneumatic silencer, includes barrel (1), enclosing cover (2), its characterized in that: the utility model discloses a sound absorbing device, including enclosing cover (2), barrel (1), enclosing cover (5), enclosing cover (8), enclosing cover (2)'s upper end surface is equipped with air inlet (3), barrel (1)'s inner wall surface fixedly connected with inhales sound drum (5), barrel (1) and the surface of inhaling sound drum (5) are equipped with venting port (6), inhale sound plectane (7) and inhale sound plectane (8) of equal fixedly connected with of interior side of upper and lower side of sound drum (5), the center department inboard surface of inhaling sound plectane (7) of worker shape is equipped with large opening (9), the upper end surface of inhaling sound plectane (7) of worker shape is equipped with first air guide big mouth (10), the lower end surface of inhaling sound plectane (7) of worker shape is equipped with first air guide big mouth (11), first air guide big mouth (10) and first air guide mouth (11) evenly distributed are in the upper end and lower end surface of worker shape sound absorbing (7), inhale sound plectane (8) center department surface is equipped with second air guide mouth (12), inhale sound with second air guide mouth (13) evenly distributed at second air guide mouth (13).
2. A pneumatic muffler as defined in claim 1, wherein: the upper end surface of the sealing cover (4) is fixedly connected with a round concave block (14), and the round concave block (14) is made of soft sponge materials.
3. A pneumatic muffler as defined in claim 1, wherein: the sound-absorbing cylinder (5) is made of polyester fiber sound-absorbing materials, and the I-shaped sound-absorbing circular plate (7) and the sound-absorbing circular plate (8) are made of polyester fiber sound-absorbing materials.
4. A pneumatic muffler as defined in claim 1, wherein: the inner end surfaces of the front side and the rear side of the outer cover (2) are connected with a clamping block (16) and a spring (17) in a sliding manner through a sliding groove (15).
5. A pneumatic muffler as defined in claim 4, wherein: the inner end surface of the spring (17) is pressed on the outer end surface of the clamping block (16).
6. A pneumatic muffler as defined in claim 5, wherein: the inner end surface of the clamping block (16) is connected with the inner side surfaces of the front side and the rear side of the upper end of the cylinder body (1) in a sliding manner through a clamping groove (19).
7. A pneumatic muffler as defined in claim 4, wherein: the center of the outer surface of the clamping block (16) is fixedly connected with a pull pin (18), a spring (17) is sleeved on the outer surface of the pull pin (18), and the outer surface of the pull pin (18) is fixedly connected with a pull head (20).
CN201910271503.5A 2019-04-04 2019-04-04 Pneumatic muffler Active CN110017266B (en)

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Application Number Priority Date Filing Date Title
CN201910271503.5A CN110017266B (en) 2019-04-04 2019-04-04 Pneumatic muffler

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CN110017266A CN110017266A (en) 2019-07-16
CN110017266B true CN110017266B (en) 2024-03-22

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111365215B (en) * 2020-03-24 2021-06-22 西安交通大学 Pneumatic silencer

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Publication number Priority date Publication date Assignee Title
US3687224A (en) * 1970-02-10 1972-08-29 Svenska Rotor Maskiner Ab Mufflers
CN1031595A (en) * 1988-09-21 1989-03-08 景尔强 A kind of airflow noise-elimination method and device
KR20020000367A (en) * 2000-06-23 2002-01-05 김정곤 Silencer
KR20040007976A (en) * 2002-07-15 2004-01-28 삼성전자주식회사 Muffler of rotary compressor
JP2004218511A (en) * 2003-01-14 2004-08-05 Ckd Corp Muffler, muffling method of compressed gas, and dehumidifier system
CN1755108A (en) * 2004-09-29 2006-04-05 丹福斯压缩器有限公司 Piston type compressor especially sealed refrigerated compressor
US7073426B1 (en) * 2005-02-22 2006-07-11 Mark White Sound suppressor
WO2008053997A1 (en) * 2006-11-02 2008-05-08 Kabushiki Kaisha Kobe Seiko Sho Sound absorbing structure
JP2010168748A (en) * 2009-01-20 2010-08-05 Yamaha Corp Sound absorbing body and acoustic room
CN102892983A (en) * 2010-05-18 2013-01-23 格瑞克明尼苏达有限公司 Low ice pneumatic motor exhaust muffler
CN203604186U (en) * 2013-11-28 2014-05-21 武汉理工大学 Double-layer serial micro-perforated pipe muffler
KR20160103878A (en) * 2015-02-25 2016-09-02 원광대학교산학협력단 Resonance type silencer for noise reduction
CN106286414A (en) * 2015-06-02 2017-01-04 北京富特盘式电机有限公司 A kind of blower fan silencing device and the application on transformer cooler blower fan thereof
CN206972339U (en) * 2017-06-30 2018-02-06 江苏大学 A kind of purifying muffler for being used for 1100 single cylinder diesels
CN207513659U (en) * 2017-09-19 2018-06-19 天津市神驰汽车零部件有限公司 A kind of mobile muffler
KR20180070161A (en) * 2016-12-16 2018-06-26 주식회사 씨앤월드 Sound-absorbing modules for sound-absorbing silencers
JP2018123747A (en) * 2017-01-31 2018-08-09 株式会社豊田自動織機 Compressor
CN207905890U (en) * 2017-12-26 2018-09-25 东莞荣兴五金制品有限公司 A kind of weeder trumpet type silencer
CN208040654U (en) * 2018-01-12 2018-11-02 盐城市国力空压机制造厂 A kind of air compressor noise-decreasing device
CN208057376U (en) * 2018-02-07 2018-11-06 安徽乐昌气动流体设备科技有限公司 A kind of pneumatic diaphragm pump silencer
JP6427620B1 (en) * 2017-04-28 2018-11-21 Kawamoto Gec株式会社 Silencer of blower
CN109441782A (en) * 2018-12-26 2019-03-08 南京舒普思达医疗设备有限公司 A kind of three-level filter device of compressor
CN210106138U (en) * 2019-04-04 2020-02-21 瑞安市乐登汽车部件有限公司 Pneumatic silencer

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3687224A (en) * 1970-02-10 1972-08-29 Svenska Rotor Maskiner Ab Mufflers
CN1031595A (en) * 1988-09-21 1989-03-08 景尔强 A kind of airflow noise-elimination method and device
KR20020000367A (en) * 2000-06-23 2002-01-05 김정곤 Silencer
KR20040007976A (en) * 2002-07-15 2004-01-28 삼성전자주식회사 Muffler of rotary compressor
JP2004218511A (en) * 2003-01-14 2004-08-05 Ckd Corp Muffler, muffling method of compressed gas, and dehumidifier system
CN1755108A (en) * 2004-09-29 2006-04-05 丹福斯压缩器有限公司 Piston type compressor especially sealed refrigerated compressor
US7073426B1 (en) * 2005-02-22 2006-07-11 Mark White Sound suppressor
WO2008053997A1 (en) * 2006-11-02 2008-05-08 Kabushiki Kaisha Kobe Seiko Sho Sound absorbing structure
JP2010168748A (en) * 2009-01-20 2010-08-05 Yamaha Corp Sound absorbing body and acoustic room
CN102892983A (en) * 2010-05-18 2013-01-23 格瑞克明尼苏达有限公司 Low ice pneumatic motor exhaust muffler
CN203604186U (en) * 2013-11-28 2014-05-21 武汉理工大学 Double-layer serial micro-perforated pipe muffler
KR20160103878A (en) * 2015-02-25 2016-09-02 원광대학교산학협력단 Resonance type silencer for noise reduction
CN106286414A (en) * 2015-06-02 2017-01-04 北京富特盘式电机有限公司 A kind of blower fan silencing device and the application on transformer cooler blower fan thereof
KR20180070161A (en) * 2016-12-16 2018-06-26 주식회사 씨앤월드 Sound-absorbing modules for sound-absorbing silencers
JP2018123747A (en) * 2017-01-31 2018-08-09 株式会社豊田自動織機 Compressor
JP6427620B1 (en) * 2017-04-28 2018-11-21 Kawamoto Gec株式会社 Silencer of blower
CN206972339U (en) * 2017-06-30 2018-02-06 江苏大学 A kind of purifying muffler for being used for 1100 single cylinder diesels
CN207513659U (en) * 2017-09-19 2018-06-19 天津市神驰汽车零部件有限公司 A kind of mobile muffler
CN207905890U (en) * 2017-12-26 2018-09-25 东莞荣兴五金制品有限公司 A kind of weeder trumpet type silencer
CN208040654U (en) * 2018-01-12 2018-11-02 盐城市国力空压机制造厂 A kind of air compressor noise-decreasing device
CN208057376U (en) * 2018-02-07 2018-11-06 安徽乐昌气动流体设备科技有限公司 A kind of pneumatic diaphragm pump silencer
CN109441782A (en) * 2018-12-26 2019-03-08 南京舒普思达医疗设备有限公司 A kind of three-level filter device of compressor
CN210106138U (en) * 2019-04-04 2020-02-21 瑞安市乐登汽车部件有限公司 Pneumatic silencer

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