CN203604153U - Three-layer serial micro-perforated pipe muffler - Google Patents
Three-layer serial micro-perforated pipe muffler Download PDFInfo
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- CN203604153U CN203604153U CN201320762989.0U CN201320762989U CN203604153U CN 203604153 U CN203604153 U CN 203604153U CN 201320762989 U CN201320762989 U CN 201320762989U CN 203604153 U CN203604153 U CN 203604153U
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- micropunch
- pipe
- muffler
- micropore
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- 239000000463 material Substances 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 230000003595 spectral effect Effects 0.000 abstract 1
- 230000030279 gene silencing Effects 0.000 description 16
- 238000000034 method Methods 0.000 description 8
- 230000008030 elimination Effects 0.000 description 6
- 238000003379 elimination reaction Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 239000011358 absorbing material Substances 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Exhaust Silencers (AREA)
Abstract
The utility model relates to the field of mufflers, in particular to a three-layer serial micro-perforated pipe muffler. A muffler body is formed by coaxially connecting four parts, namely, a shell (5), an outer micro-perforated pipe (4), a middle micro-perforated pipe (3) and an inner micro-perforated pipe (2), from outside to inside in a sleeved mode, wherein the wall of the outer micro-perforated pipe (4), the wall of the middle micro-perforated pipe (3) and the wall of the inner micro-perforated pipe (2) are respectively and densely provided with straight-through micro holes perpendicular to the central axis of the four parts, and cavities are formed between the pipe layers of the muffler body and between the outer micro-perforated pipe (4) and the shell (5) respectively and not filled with any filling material. When the muffler works, airflow moves through the pipes directly, and therefore backpressure loss is small. The exhaust muffler is simple in structure, easy and convenient to machine, low in cost, resistant to high temperature, corrosion and airflow impact due to a pure-metal structure, and long in service life. The muffler has an excellent muffling effect in a whole spectral range, particularly in a high-frequency section, and the muffling amount ranges from 15 dB to 25 dB.
Description
Technical field
The utility model relates to silencing apparatus field, and a kind of three layers of series connection micropunch muffler pipe that are applied to extraction pump exhausting silencer are specifically provided.
Background technique
When extraction pump work, noise is mainly made up of gas flow noise and mechanical part motion artifacts, noise frequency wider range.In the HFS of eliminating in gas flow noise, the medium and low frequency part in mechanical noise is very important equally.Traditional dissipative muffler needs filling sucting sound material to reach the object of noise reduction; Reactive muffler is produced impedance mismatching and is reached the object of noise elimination by labyrinth.The former is not suitable for relative closure environmental work, because the washing away for a long time lower sound-absorbing material and inevitably can swim in working room of exhaust stream, thereby personnel's health is had a negative impact; Wash away for a long time the sound-absorbing material making in silencing apparatus and reduce, soundproof effect reduces, and therefore its working life is not long.Reactive muffler need to utilize complicated cavity or resonant cavity design, makes muffler volume larger, and exhaust back pressure is larger.
Model utility content
The technical problems to be solved in the utility model is, providing a kind of can use for a long time in relative closure working environment, tool is high temperature resistant, corrosion-resistant, resistance to gas shock, long service life, soundproof effect are good, exhaust pressure loss is little, simple in structure, process easy, lower-cost silencing apparatus, can in the wider frequency section that comprises low, middle and high frequency rate, eliminate the noise.
For solving the problems of the technologies described above, the technical solution of the utility model is as follows:
A kind of three layers of series connection micropunch muffler pipe, comprise inlet end (7), exhaust end (8) and the muffler body between inlet end (7) and exhaust end (8), it is characterized in that: described muffler body is coaxially socketed and forms by pipe (3), micropunch inner tube (2) four parts in shell (5), micropunch outer tube (4), micropunch from outside to inside, and in micropunch outer tube (4), micropunch, on pipe (3), micropunch inner tube (2) tube wall, be covered with micropore, and each micropore is the straight-through micropore perpendicular to tetrameric central axis; Between each pipe layer of muffler body and between micropunch outer tube (4) and shell (5), be that cavity and each cavity are all without any packing material; Between inlet end (7) and muffler body, be connected by front cover (1) sealing, between exhaust end (8) and muffler body, be connected by rear end cover (6) sealing, front cover (1) and rear end cover (6) center arrange the central through bore with micropunch inner tube (2) equal diameters, micropunch inner tube (2) and inlet end (7) and exhaust end (8) equal diameters, directly conducting inlet end (7) and exhaust end (8), or one end of micropunch inner tube (2) is directly stretched out and is formed exhaust end (8) from rear end cover (6) central through bore.
By technique scheme, the cavity depth between each pipe layer of muffler body and between micropunch outer tube (4) and shell (5) is all unequal.
By technique scheme, in the shell (5) of muffler body and micropunch outer tube (4), micropunch, the cross section of pipe (3), micropunch inner tube (2) is circle; Or in shell (5), micropunch outer tube (4) and micropunch, the cross section of pipe (3) is square, and the cross section of micropunch inner tube (2) is circular.
By technique scheme, aperture and the porosity ratio of the micropore of each pipe layer are all not identical.
By technique scheme, the aperture of the micropore of each pipe layer is 0.1-0.5mm, and porosity ratio is less than 5%.
By technique scheme, shell (5) and each pipe layer of muffler body are metal material.
By technique scheme, the pipe thickness of each pipe layer of muffler body is identical or different.
The utility model utilizes smaller size smaller to reach larger soundproof effect, muffler body adopts three layers of micropunch pipe, between each layer of micropunch pipe, it is cavity, cavity is interior without packing material, by three layers of microperforated panel aperture, porosity ratio, each cavity depth Proper Match, realize the elimination to different frequency range noise.When silencing apparatus work, air-flow directly flows by pipeline, and back pressure loss is little.When work, the inlet end of air-flow from front cover flows into, and radial flow is crossed the cavity layer between shell and three layers of series connection micropunch pipe, and the exhaust end after three layers of micropunch pipe are eliminated the noise from rear end cover is discharged.Air-flow is when through silencing apparatus, and micro-pore diameter and porosity ratio on tube wall are little, and surface is relatively smooth, less to air current flow resistance, and main gas flows along tube axis direction, and therefore the pressure loss is little.When sound wave passes through micropore, be converted into heat energy because the rubbing action of air and micropore makes acoustic energy, thereby realize the object of eliminating the noise.Calculate discovery by optimization, in microporous pipe structure, pore size can affect the frequency of noise elimination simultaneously; Under identical aperture, porosity ratio increases frequency of noise elimination meeting toward high-frequency mobile; Change cavity depth, change the each layer of distance between micropunch pipe and can improve deadening frequency band width, and improve sound deadening capacity.In three layers of micropunch tubular construction, the porosity ratio, aperture and the cavity body degree of depth that reasonably design each layer of perforated plate can obtain wider frequency of noise elimination and larger sound deadening capacity, and sound deadening capacity can reach 15dB.
As deformation design of the present utility model, can design series connection micropunch muffler pipes two-layer or four layers, but with respect to two-layer, the structure that the utility model is three layers can obtain the frequency of noise elimination of wider frequency section and larger sound deadening capacity by the Proper Match of porosity ratio, aperture and the cavity body degree of depth of each layer of perforated plate, and four layers of above series connection micropunch tubular construction are substantially without soundproof effect.
The beneficial effects of the utility model are: in the situation that buffer chamber not being set, use three layers of series connection micropunch pipe just can reach the soundproof effect of wider frequency section, reduce than the volume of traditional impedance structure silencing apparatus; Inlet end and exhaust end directly communicate, and air-flow, without any turning and buffering, has farthest reduced flow resistance when air-flow passes through silencing apparatus; Pure metal structure, can high temperature resistant, corrosion-resistant, resistance to gas shock, long service life; Do not adopt inflammable, the easy inhalation (inhalatio)s such as acoustical cotton, guaranteed the safety of people when silencing apparatus is worked in relative closure environment.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is three layers of series connection micropunch muffler pipe structural representation in first embodiment of the utility model;
Fig. 2 is A-A sectional view of Fig. 1;
Fig. 3 is that micropore inner tube micropore is arranged partial schematic diagram;
Fig. 4 is that in micropore, pipe micropore is arranged partial schematic diagram;
Fig. 5 is that micropore outer tube micropore is arranged partial schematic diagram;
In figure, each mark is corresponding as follows: in front cover 1, micropore inner tube 2, micropore, manage 3, micropore outer tube 4, shell 5, rear end cover 6, inlet end 7, exhaust end 8, runner I 9, cavity II 10, cavity III 11, cavity IV 12; The micropore 14 of pipe, the micropore 15 of micropore outer tube in the micropore 13 of micropore inner tube, micropore.
Embodiment
Embodiment 1:
As Fig. 1-5, three layers of series connection micropunch muffler pipe of the present utility model comprise metal shell 5, the two ends of shell 5 are respectively front cover 1 and rear end cover 6, and silencing apparatus cross section is circular, from cross section see be followed successively by from the inside to surface micropore inner tube 2, micropore, manage 3, micropore outer tube 4, muffler shell 5.
Muffler shell 5 is cylindrical shape; The arrangement that adopts inlet end directly to communicate by suppressor case with exhaust end, described inlet end and exhaust end are positioned at the center at cylinder two ends; Muffler shell 5 is interior arranges three layers of micropunch pipe along axial direction, and described enclosure interior spatial separation is become to runner I 9, cavity II 10, cavity III 11, cavity IV 12; Described three layers of micropunch pipe are cylindric, and micropore inner tube 2 is identical with exhaust end 8 diameters with inlet end 7, directly inlet end and exhaust end described in conducting.Micropore outer tube 4, between micropore inner tube 2 and shell 5, is separated into volume two-part not etc. by the cavity between described micropore inner tube 2 and shell 5.In micropore, manage 3 between micropore outer tube 4 and micropore inner tube 2, the cavity between micropore outer tube 4 and micropore inner tube 2 is separated into volume two-part not etc. along housing axial direction; In described micropore inner tube 2, micropore, manage 3, be equipped with the micropore of different pore size on micropore outer tube 4, the micropore arrangement difference that in three layers of microporous pipe, micropore adopts.
In described micropore inner tube 2, micropore, manage 3 and micropore outer tube 4 adopt the sheetmetal punching of same thickness to make.As in Figure 3-5, described micropore inner tube micropore 13 diameters are 0.5mm, are 1.6mm along the distance between borehole of 13 of the axial adjacent micropores of silencing apparatus, are 1mm along the hole circle heart distance of 13 of the adjacent two row micropores of silencing apparatus cross-sectional circumferential direction.In described micropore, pipe micropore 14 diameters are 0.8mm, along longitudinal adjacent micropore 14 distance of center circle of silencing apparatus from being 1.8mm, along adjacent two row micropore 14 distance of center circle of silencing apparatus cross-sectional circumferential direction from being 1.8mm.Described micropore outer tube micropore 15 diameters are 1mm, and along longitudinal adjacent micropore 15 distance of center circle of silencing apparatus from being 2mm, along adjacent two row micropore 15 distance of center circle of silencing apparatus cross-sectional circumferential direction from being 2.6mm, also the porosity ratio of different pipe layers and aperture are all different.
Embodiment 2:
Basic identical with embodiment 1 Fig. 1 and Fig. 3-5, difference is that muffler shell 5 cross sections are square, and described micropore outer tube 4 cross sections are square, manage 3 cross sections for square in described micropore, and micropore inner tube 2 cross sections are circular.
In other unlisted embodiments, also can change that in muffler shell 5, micropore outer tube 4, micropore, to manage 3 shape of cross section be isosceles polygonal, as rhombus or pentagon.
In above-mentioned two embodiments, when three layers of series connection micropunch muffler pipe work, the inlet end 7 of air-flow from front cover 1 flows into, and flows through shell 5 and three layers of series connection micropunch pipe 2,3,4, and the exhaust end 8 after three layers of micropunch pipe are eliminated the noise from rear end cover 6 is discharged.Air-flow when the silencing apparatus without any turning and buffering course, thereby farthest reduce exhaust back pressure.
The foregoing is only the restriction the utility model that is preferably not used in of the present utility model; those skilled in the art can carry out various changes and not depart from spirit and scope of the present utility model the utility model, and all these change the protection domain that all should belong to the utility model claims.
Claims (7)
1. one kind three layers series connection micropunch muffler pipe, comprise inlet end (7), exhaust end (8) and the muffler body between inlet end (7) and exhaust end (8), it is characterized in that: described muffler body is coaxially socketed and forms by pipe (3), micropunch inner tube (2) four parts in shell (5), micropunch outer tube (4), micropunch from outside to inside, and in micropunch outer tube (4), micropunch, on pipe (3), micropunch inner tube (2) tube wall, be covered with micropore, and each micropore is the straight-through micropore perpendicular to tetrameric central axis; Between each pipe layer of muffler body and between micropunch outer tube (4) and shell (5), be that cavity and each cavity are all without any packing material; Between inlet end (7) and muffler body, be connected by front cover (1) sealing, between exhaust end (8) and muffler body, be connected by rear end cover (6) sealing, front cover (1) and rear end cover (6) center arrange the central through bore with micropunch inner tube (2) equal diameters, micropunch inner tube (2) and inlet end (7) and exhaust end (8) equal diameters, directly conducting inlet end (7) and exhaust end (8), or one end of micropunch inner tube (2) is directly stretched out and is formed exhaust end (8) from rear end cover (6) central through bore.
2. three layers of series connection micropunch muffler pipe according to claim 1, is characterized in that: the cavity depth between each pipe layer of muffler body and between micropunch outer tube (4) and shell (5) is all unequal.
3. three layers of series connection micropunch muffler pipe according to claim 1 and 2, is characterized in that: in the shell (5) of muffler body and micropunch outer tube (4), micropunch, the cross section of pipe (3), micropunch inner tube (2) is circle; Or in shell (5), micropunch outer tube (4) and micropunch, the cross section of pipe (3) is square, and the cross section of micropunch inner tube (2) is circular.
4. three layers of series connection micropunch muffler pipe according to claim 3, is characterized in that: aperture and the porosity ratio of the micropore of each pipe layer are all not identical.
5. according to three layers of series connection micropunch muffler pipe described in claim 1 or 2 or 4, it is characterized in that: the aperture of the micropore of each pipe layer is 0.1-0.5mm, and porosity ratio is less than 5%.
6. three layers of series connection micropunch muffler pipe according to claim 5, is characterized in that: shell (5) and each pipe layer of muffler body are metal material.
7. according to three layers of series connection micropunch muffler pipe described in claim 1 or 2 or 4 or 6, it is characterized in that: the pipe thickness of each pipe layer of muffler body is identical or different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320762989.0U CN203604153U (en) | 2013-11-28 | 2013-11-28 | Three-layer serial micro-perforated pipe muffler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320762989.0U CN203604153U (en) | 2013-11-28 | 2013-11-28 | Three-layer serial micro-perforated pipe muffler |
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| CN203604153U true CN203604153U (en) | 2014-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320762989.0U Expired - Lifetime CN203604153U (en) | 2013-11-28 | 2013-11-28 | Three-layer serial micro-perforated pipe muffler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670602A (en) * | 2013-11-28 | 2014-03-26 | 武汉理工大学 | Three-layer series micro-perforated pipe muffler |
| CN109073270A (en) * | 2016-03-14 | 2018-12-21 | 声学超材料有限公司 | The acoustic metamaterial noise control method and equipment of pipe-line system |
-
2013
- 2013-11-28 CN CN201320762989.0U patent/CN203604153U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103670602A (en) * | 2013-11-28 | 2014-03-26 | 武汉理工大学 | Three-layer series micro-perforated pipe muffler |
| CN103670602B (en) * | 2013-11-28 | 2017-01-18 | 武汉理工大学 | Three-layer series micro-perforated pipe muffler |
| CN109073270A (en) * | 2016-03-14 | 2018-12-21 | 声学超材料有限公司 | The acoustic metamaterial noise control method and equipment of pipe-line system |
| JP2019518191A (en) * | 2016-03-14 | 2019-06-27 | アコースティック メタマテリアルズ インコーポレイテッドＡｃｏｕｓｔｉｃ Ｍｅｔａｍａｔｅｒｉａｌｓ， Ｉｎｃ． | Acoustic metamaterial noise control method and apparatus in duct system |
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| GR01 | Patent grant |