CN202419029U - Compound silencer - Google Patents
Compound silencer Download PDFInfo
- Publication number
- CN202419029U CN202419029U CN2012200234566U CN201220023456U CN202419029U CN 202419029 U CN202419029 U CN 202419029U CN 2012200234566 U CN2012200234566 U CN 2012200234566U CN 201220023456 U CN201220023456 U CN 201220023456U CN 202419029 U CN202419029 U CN 202419029U
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- Prior art keywords
- perforated
- acoustic hood
- drum core
- perforated drum
- acoustic shield
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Abstract
The utility model relates to a compound silencer which comprises an acoustic shield and a perforated cylinder core in the acoustic shield, wherein the surface of the acoustic shield is perforated and the front end of the acoustic shield is a hemispherical end head, the diameters of perforated holes in the acoustic shield cylinder are not larger than the diameters of perforated holes in the hemispherical end head, and the diameters of the perforated holes in the perforated cylinder core are identical; the perforated cylinder core is in bolted connection with the acoustic shield by a flange at the lower end; upper, middle and lower parts of the perforated cylinder core are respectively connected with the inner wall of the acoustic shield by upper, middle and lower partitions of a three-quarter disc structure, and the upper, the middle and the lower partitions are arranged in a staggered manner; and the perforated holes of the acoustic shield and the perforated cylinder core are distributed in a square form, the diameters of the perforated holes can be 0.4-1 mm, and the perforation rate of the acoustic shield is not less than 4.8%, and the perforation rate of the perforated cylinder core is twice that of the acoustic shield. The compound silencer is formed by two layers of perforated plate structures, the flow area is large and the air resistance is low; multiple partitions can be installed between the two layers of perforated plates to form multiple resonance chambers in the silencer, so that the silencing amount is effectively improved, the silencing wave band is increased and the compound silencer can be used inside and outside a tube and is convenient for dismounting and cleaning.
Description
Technical field
The utility model relates to a kind of silencing apparatus, is specifically related to a kind of complex muffler.
Background technique
Impedance muffler is to constitute by resistive combining through suitable structure with two kinds of noise-cancelling theorys of resistance, is widely used in the high pressure gas emptying noise reduction process.Because the resistive or reactive muffler structure that the structure of this type complex muffler is more single is slightly complicated; And adopt the one welded structure usually; Therefore in use can only be fixed in a certain position on the outlet pipe; And after long-time the use, can't clean, thereby cause noise elimination structure to be reduced the noise elimination effect by the dust obstruction to internal structure.
Summary of the invention
The purpose of the utility model provides a kind of complex muffler, can be used in the outlet pipe outsidely with outlet pipe, and has excellent noise reduction effect, and compact structure and be convenient to dismounting and the effect of cleaning is to overcome the deficiency of existing technology.
For achieving the above object, the utility model is taked following technological scheme:
A kind of complex muffler is characterized in that this silencing apparatus comprises that a surface has the acoustic hood and the perforated drum core that is fixed in the acoustic hood of perforation; Described acoustic hood comprises a tubular structure body, and the front end of this tubular structure body has hemispherical head, and the penetration hole diameter on acoustic hood tubular structure body is not more than the penetration hole diameter on the hemispherical head; Described perforated drum core comprises a tubular structure body, and the front end of this tubular structure body has hemispherical head, and it is identical to be opened in the diameter of the perforation on the perforated drum core barrel.
Realize perforated drum core fixing in acoustic hood for ease; Simultaneously can flow to outflow via the perforation of perforated drum core in order to ensure most of gas again; Above-mentioned perforated drum core lower end is provided with the diameter flange identical with the acoustic hood inner diameter, and is connected with the acoustic hood bolt via this flange.
In order to realize the held stationary of perforated drum core in acoustic hood, can not hinder gas flow again simultaneously, the middle part of above-mentioned perforated drum core is connected with the inwall of acoustic hood via central diaphragm, and central diaphragm is 3/4ths disc structures.
In order further to realize the held stationary of perforated drum core in acoustic hood; Especially to the long situation of perforated drum core; Reduce flow velocity in order to make air-flow produce eddy flow to increase the stream distance again simultaneously at acoustic hood; Thereby reduce the final purpose of the kinetic energy of air-flow in acoustic hood to realize eliminating the noise; Set up upper clapboard and the lower clapboard identical in the both sides up and down of above-mentioned central diaphragm, the upper and lower of above-mentioned perforated drum core is connected with the inwall of acoustic hood with lower clapboard via upper clapboard respectively with the central diaphragm structure; Therefore described upper clapboard and lower clapboard are 3/4ths disc structures, and described upper clapboard, central diaphragm, lower clapboard is staggered and make its separately 1/4th disk breach do not overlap each other.
Perforation on the above-mentioned acoustic hood is by square profile, and penetration hole diameter can be 0.4mm-2mm, and the acoustic hood percent opening is for being not less than 4.8%; Perforation on the above-mentioned perforated drum core is by square profile, and opening diameter can be 0.4mm-1mm, and the percent opening of perforated drum core is the twice of acoustic hood percent opening.
Described acoustic hood, perforated drum core, upper clapboard, central diaphragm, lower clapboard all can be processed by aluminum alloy material.
Existing silencing apparatus can only be used for managing outside interior or the pipe owing to self structure designs general use, and is general inside and outside can't realizing managing, and after the use for a long time; Inner flow passage components are stopped up by dust; Cause the noise reduction of silencing apparatus to descend, it is dual-purpose and be convenient to the complex muffler of dismounting and cleaning inside and outside a kind of pipe that the utility model provides, and its advantage is: be made up of two-layer AND DEWATERING FOR ORIFICE STRUCTURE; Flow area is bigger, and vapour lock is less; Between the two-layer AND DEWATERING FOR ORIFICE STRUCTURE a plurality of dividing plates can be installed, in silencing apparatus, form a plurality of resonance cavates, can improve sound deadening capacity effectively, increase the noise elimination frequency range.
Description of drawings
Fig. 1 is the integral assembling structure schematic representation that the utility model is implemented.
Fig. 2 is the whole cross-sectional schematic that the utility model is implemented.
Fig. 3 is the diaphragm structure schematic representation that the utility model is implemented.
Wherein, 1, acoustic hood, 2, the perforated drum core, 3, upper clapboard, 4, central diaphragm, 5, lower clapboard, 6, bolt, 7, nut, 8, bolt hole, 9, flange.
Embodiment
Like Fig. 1, shown in 2, a kind of complex muffler is characterized in that this silencing apparatus comprises that a surface has the acoustic hood 1 and the perforated drum core 2 that is fixed in the acoustic hood 1 of perforation; Described acoustic hood 1 comprises a tubular structure body, and the front end of this tubular structure body has hemispherical head, and the penetration hole diameter on acoustic hood 1 tubular structure body is not more than the penetration hole diameter on the hemispherical head; Described perforated drum core 2 comprises a tubular structure body, and the front end of this tubular structure body has hemispherical head, and it is identical to be opened in the diameter of the perforation on perforated drum core 2 barrels.
Like Fig. 1, shown in 2; Realize perforated drum core 2 fixing in acoustic hood 1 for ease; Simultaneously can flow to acoustic hood 1 via perforated drum core 2 in order to ensure most of gas again; Above-mentioned perforated drum core 2 lower ends are provided with diameter and the identical flange of acoustic hood 1 inner diameter, and are connected with acoustic hood 1 bolt via this flange.
Shown in Fig. 1～3, in order to realize the held stationary of perforated drum core 2 in acoustic hood 1, can not hinder gas flow again simultaneously, the middle part of above-mentioned perforated drum core 2 is connected via the inwall of central diaphragm 4 with acoustic hood 1, and central diaphragm 4 is 3/4ths disc structures.
Shown in Fig. 1～3; In order further to realize the held stationary of perforated drum core 2 in acoustic hood 1; Especially to the long situation of perforated drum core 2; Reduce flow velocity in order to make air-flow produce eddy flow to increase the stream distance again simultaneously, thereby reduce the final purpose of the kinetic energy of air-flow in acoustic hood 1, set up upper clapboard 3 and lower clapboard 5 in the both sides up and down of above-mentioned central diaphragm 4 to realize eliminating the noise at acoustic hood 1; The upper and lower of above-mentioned perforated drum core 2 is connected with the inwall of lower clapboard 5 with acoustic hood 1 via upper clapboard 3 respectively, and described upper clapboard 3 is 3/4ths disc structures with lower clapboard 5; And described upper clapboard 3, central diaphragm 4, lower clapboard 5 is staggered and make its separately 1/4th disk breach do not overlap each other.
Embodiment
Shown in Fig. 1～3, offer four bolt holes 8 on the cylinder wall of acoustic hood 1; Offer four bolt holes 8 on the flange of perforated drum core 2 lower ends, and acoustic hood 1 is connected with nut 7 via bolt 6 with perforated drum core 2.
Piercing aperture has considerable influence to the transmission loss of silencing apparatus on acoustic hood 1 and the perforation tube core 2; The aperture is more little; Noise elimination frequency band is wide more, is applicable to that more high band eliminates the noise, and factors such as percent opening that can be through changing acoustic hood 1 and perforation tube core 5 and hole distribution realize its noise reduction.In the present embodiment, hole is by square profile on acoustic hood 1 and the perforation tube core 2, and opening diameter can be 0.4mm-1mm, and acoustic hood 1 percent opening is for being not less than 4.8%, and the percent opening of perforation tube core 2 is the twice of acoustic hood 1 percent opening;
The outside dimension of perforated drum core 2 is slightly less than upper clapboard 3, central diaphragm 4, lower clapboard 5 top cylinder core fixed hole diameters; The external diameter of upper clapboard 3, central diaphragm 4, lower clapboard 5 is slightly less than acoustic hood 1 internal diameter, and the axial distance between the bolt hole of offering on acoustic hood 1 cylindrical wall 8 should be greater than the height of upper clapboard 3, central diaphragm 4, lower clapboard 5.
Silencing apparatus after the combination is as in the pipe during silencing apparatus, and the internal diameter of outlet pipe should be greater than the cylinder outer diameter of acoustic hood 1, and less than the outer diameter of flange 9;
During outer silencing apparatus, the internal diameter of outlet pipe should be less than the cylinder inner diameter of acoustic hood 1 as pipe for silencing apparatus after the combination, and the external diameter of outlet pipe is not less than the outer diameter of flange 9.
Claims (6)
1. a complex muffler is characterized in that this silencing apparatus comprises that a surface has the acoustic hood of perforation (1) and is fixed in the perforated drum core (2) in the acoustic hood (1); Described acoustic hood (1) comprises a tubular structure body, and the front end of this tubular structure body has hemispherical head, and the penetration hole diameter on acoustic hood (1) tubular structure body is not more than the penetration hole diameter on the hemispherical head; Described perforated drum core (2) comprises a tubular structure body, and the front end of this tubular structure body has hemispherical head, and it is identical to be opened in the diameter of the perforation on perforated drum core (2) barrel.
2. silencing apparatus as claimed in claim 1 is characterized in that above-mentioned perforated drum core (2) lower end is provided with diameter and the identical flange of acoustic hood (1) inner diameter, and is connected with acoustic hood (1) bolt via this flange.
3. silencing apparatus as claimed in claim 2 it is characterized in that the middle part of above-mentioned perforated drum core (2) is connected via the inwall of central diaphragm (4) with acoustic hood (1), and central diaphragm (4) is 3/4ths disc structures.
4. silencing apparatus as claimed in claim 3; It is characterized in that also comprising central diaphragm (4) upper clapboard (3) and the lower clapboard (5) identical of both sides up and down with central diaphragm (4) structure; The upper and lower of said perforated drum core (2) is connected with the inwall of lower clapboard (5) with acoustic hood (1) via upper clapboard (3) respectively, and described upper clapboard (3), central diaphragm (4), lower clapboard (5) are staggered.
5. like any described silencing apparatus of claim 1～4, it is characterized in that square profile is pressed in the perforation on the above-mentioned acoustic hood (1), penetration hole diameter can be 0.4mm-2mm, and acoustic hood (1) percent opening is for being not less than 4.8%.
6. silencing apparatus as claimed in claim 5 is characterized in that square profile is pressed in the perforation on the above-mentioned perforated drum core (2), and opening diameter can be 0.4mm-1mm, and the percent opening of perforated drum core (2) is the twice of acoustic hood (1) percent opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200234566U CN202419029U (en) | 2012-01-18 | 2012-01-18 | Compound silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200234566U CN202419029U (en) | 2012-01-18 | 2012-01-18 | Compound silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202419029U true CN202419029U (en) | 2012-09-05 |
Family
ID=46743792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200234566U Expired - Fee Related CN202419029U (en) | 2012-01-18 | 2012-01-18 | Compound silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202419029U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807561A (en) * | 2012-11-14 | 2014-05-21 | 中国石油天然气股份有限公司 | Customizable natural gas line embeds prevents blockking up and falls device of making an uproar |
| CN104006260A (en) * | 2014-06-09 | 2014-08-27 | 江苏业安环保设备科技有限公司 | Water pipe flow stabilizing broadband muffler |
| CN105369489A (en) * | 2015-12-11 | 2016-03-02 | 杰克缝纫机股份有限公司 | Air suction device for sewing machine |
| CN108331991A (en) * | 2018-03-26 | 2018-07-27 | 连云港宇泰电力设备有限公司 | Combined steam vent silencer |
| CN108836630A (en) * | 2018-06-28 | 2018-11-20 | 广东工业大学 | A kind of noise elimination structure noiseproof earplug |
-
2012
- 2012-01-18 CN CN2012200234566U patent/CN202419029U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807561A (en) * | 2012-11-14 | 2014-05-21 | 中国石油天然气股份有限公司 | Customizable natural gas line embeds prevents blockking up and falls device of making an uproar |
| CN104006260A (en) * | 2014-06-09 | 2014-08-27 | 江苏业安环保设备科技有限公司 | Water pipe flow stabilizing broadband muffler |
| CN104006260B (en) * | 2014-06-09 | 2016-02-24 | 江苏业安环保设备科技有限公司 | Water lines current stabilization Broad Band Muffler |
| CN105369489A (en) * | 2015-12-11 | 2016-03-02 | 杰克缝纫机股份有限公司 | Air suction device for sewing machine |
| CN105369489B (en) * | 2015-12-11 | 2019-01-11 | 杰克缝纫机股份有限公司 | Sewing machine air intake device |
| CN108331991A (en) * | 2018-03-26 | 2018-07-27 | 连云港宇泰电力设备有限公司 | Combined steam vent silencer |
| CN108836630A (en) * | 2018-06-28 | 2018-11-20 | 广东工业大学 | A kind of noise elimination structure noiseproof earplug |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20130118 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |