CN103742242B - A kind of SCR catalytic muffler and escape pipe thereof - Google Patents
A kind of SCR catalytic muffler and escape pipe thereof Download PDFInfo
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- CN103742242B CN103742242B CN201310727432.8A CN201310727432A CN103742242B CN 103742242 B CN103742242 B CN 103742242B CN 201310727432 A CN201310727432 A CN 201310727432A CN 103742242 B CN103742242 B CN 103742242B
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- escape pipe
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- scr catalytic
- catalytic muffler
- inner tube
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Exhaust Gas After Treatment (AREA)
- Exhaust Silencers (AREA)
Abstract
The invention discloses a kind of SCR catalytic muffler escape pipe, comprise outer tube (1) and inner tube (2), the two ends of described inner tube (2) are connected by the conical surface (3) transition with the two ends of described outer tube (1) respectively mutually, filling sucting sound material in cavity between described outer tube (1) and inner tube (2), offers the first bloop (4) being communicated with described cavity on the tube wall of described inner tube (2). This escape pipe has good noise elimination effect, can significantly improve the noise elimination noise reduction effect of SCR catalytic muffler. The invention also discloses the SCR catalytic muffler that is provided with described escape pipe.
Description
Technical field
The present invention relates to treatment of diesel exhaust technical field, particularly diesel SCR catalytic mufflerEscape pipe. The invention still further relates to the SCR catalytic muffler that is provided with described escape pipe.
Background technology
At present, environment is one of several large problems of the world today with polluting, and noise pollution has also more and more causedPeople's attention, laws and regulations have also been made corresponding restriction to engine noise.
SCR technology is one of main post-processing technology of eliminating nitrogen oxide in diesel exhaust gas, according to meritCan mainly be divided into control module, urea dosage device and catalytic reaction unit three parts.
The control module of SCR system and the control module of engine (ECU) integrate, and are mainlyBe used for carrying out SCR control strategy, and according to environment temperature, delivery temperature, urea level, urea temperature,The sensor signal control urea dosage devices such as urea pressure, NOx concentration, according to demand at regular time and quantitySpraying urea liquid is mapped in exhaust airstream.
Urea dosage device mainly comprises urea box, urea supply unit, urea-spray unit, heating groupPart and connecting line and circuit, ensure abundant atomization and the decomposition of urea liquid.
Catalytic reaction unit (being SCR catalytic muffler) mainly comprise SCR catalyst, carrier andEncapsulation, being used for the main harmful components reduction of nitrogen oxide in diesel exhaust gas is nitrogen G&W.
When work, aqueous solution of urea sprays into blast pipe or directly sprays into SCR catalysis through urea nozzle and eliminates the noiseIn device, more than 200 DEG C there is pyrolytic reaction in temperature, produce ammonia (NH3), ammonia is at catalystUnder effect, in SCR catalytic muffler, react with the nitrogen oxide (NOx) in tail gas, reach elimination bavinThe object of oil machine tail gas nitrogen oxide (NOx).
Please refer to Fig. 1, Fig. 1 is the structural representation of existing SCR catalytic muffler.
As shown in the figure, this SCR catalytic muffler afterbody be just simply designed with one section of escape pipe 2 ',Directly draw from the outlet chamber of rear end, the noise of the tail gas of can not decaying preferably, that is to say, SCR urgesHave noise elimination function although change silencer itself, its escape pipe 2 ＇ can not play any noise elimination noise reductionEffect, needs further improvement.
Therefore, how further improving the noise elimination noise reduction effect of SCR catalytic muffler, is art technologyPersonnel's technical issues that need to address.
Summary of the invention
The first object of the present invention is to provide a kind of SCR catalytic muffler escape pipe. This escape pipe hasGood noise elimination effect, can significantly improve the noise elimination noise reduction effect of SCR catalytic muffler.
The second object of the present invention is to provide a kind of SCR catalytic muffler that is provided with described escape pipe.
For achieving the above object, the invention provides a kind of SCR catalytic muffler escape pipe, comprise outer tubeAnd inner tube, the two ends of described inner tube are connected by conical surface transition with the two ends of described outer tube respectively,Filling sucting sound material in cavity between described outer tube and inner tube, offers on the tube wall of described inner tubeThere is the first bloop being communicated with described cavity.
Preferably, the described conical surface is inner conical surface.
Preferably, on the conical surface of described outer tube and inner tube outlet side, offer the second bloop.
Preferably, the aperture of described the second bloop is greater than the aperture of described the first bloop.
Preferably, described the first bloop is uniformly distributed in the tube wall of described inner tube within the scope of 360 degreeOn.
Preferably, described outer tube and inner tube are straight tube.
Preferably, the angle of taper scope of the described conical surface is between 75 °～145 °.
For realizing above-mentioned the second object, the present invention also provides a kind of SCR catalytic muffler, comprise shell,Air inlet pipe, carrier and escape pipe, described escape pipe is that the SCR catalytic muffler described in above-mentioned any one goes outTracheae.
Preferably, described enclosure is divided into ante-chamber, intermediate cavity and back cavity; The outlet side of described air inlet pipeBe communicated with intermediate cavity, described intermediate cavity is communicated with ante-chamber, and described ante-chamber is communicated with the inlet end of carrier, instituteThe outlet side of stating carrier is communicated with back cavity, and described back cavity is communicated with the inlet end of escape pipe; Described air inlet pipeInlet end and the outlet side of escape pipe be positioned at the same side of described shell.
Preferably, described enclosure is divided into ante-chamber, intermediate cavity and back cavity; The outlet side of described air inlet pipeBe communicated with intermediate cavity, described intermediate cavity is communicated with back cavity, and described back cavity is communicated with the inlet end of carrier, instituteThe outlet side of stating carrier is communicated with ante-chamber, and described ante-chamber is communicated with the inlet end of escape pipe; Described air inlet pipeInlet end and the outlet side of escape pipe be positioned at the both sides of described shell.
SCR catalytic muffler escape pipe provided by the invention is two-layer pipe, by connecting by conical surface transitionThe outer tube connecing and inner tube form, wherein not perforate of outer tube, and to ensure sealing property, inner tube exists360 degree arrange open-celled structure in circumferential scope, i.e. the first bloop, by the first bloop structureThe computational analysis of optimal design and flowing dynamics, can reach good soundproof effect, simultaneously outer tubeWith inner tube in the middle of cavity in filling sucting sound material, the straight length of escape pipe is longer, can fill moreSound-absorbing material, therefore can effectively play the effect of noise elimination, can significantly improve the noise elimination of SCR catalytic mufflerNoise reduction.
In a kind of preferred version, on the conical surface of described outer tube and inner tube outlet side, offer second and disappearSound hole. By the second bloop is set, can make more gas by between outer tube and inner tubeSilencing cotton, thus noise elimination noise reduction effect further improved, can prevent from forming dead space simultaneously, avoid gasIn interlayer, can not flow.
SCR catalytic muffler provided by the invention is provided with described escape pipe, due on described escape pipe hasState technique effect, the SCR catalytic muffler that is provided with this escape pipe also possesses corresponding technique effect.
Brief description of the drawings
Fig. 1 is the structural representation of existing SCR catalytic muffler;
Fig. 2 is the structural representation of SCR catalytic muffler escape pipe provided by the present invention;
Fig. 3 is the structural representation of the SCR catalytic muffler of air inlet pipe and escape pipe homonymy layout;
Fig. 4 is the gas flow schematic diagram of the inside of SCR catalytic muffler shown in Fig. 3;
Fig. 5 is the structural representation of the SCR catalytic muffler of air inlet pipe and escape pipe heteropleural layout.
In Fig. 1:
Air inlet pipe 1 ＇ escape pipe 2 ＇
In Fig. 2 to Fig. 5:
1. outer tube 2. inner tube 3. conical surface 4. first bloop 5. second bloops 6.After air inlet pipe 7. escape pipe 8. shell 9. front shroud 10. front apron 11. backboards 12.Cover plate 13. ante-chamber 14. intermediate cavity 15. back cavities
Detailed description of the invention
Core of the present invention is to provide a kind of escape pipe structure of double-deck straight length and integrated this escape pipeSCR catalytic muffler, to reach the object of noise elimination noise reduction.
In order to make those skilled in the art person understand better the present invention program, below in conjunction with accompanying drawing and concreteThe present invention is described in further detail for embodiment.
Please refer to Fig. 2, Fig. 2 is the structural representation of SCR catalytic muffler escape pipe provided by the present invention.
In a kind of detailed description of the invention, SCR catalytic muffler escape pipe provided by the invention is double-deck knotStructure, is mainly made up of outer tube 1 and inner tube 2.
The two ends of inner tube 2 are with respect to the inside indentation certain distance of outer tube 1, and respectively with outer tube 1Two ends connect by the conical surface 3 transition, in the cavity in the middle of outer tube 1 and inner tube 2, fill sound absorption materialMaterial as silencing cotton (not shown), offers some within the scope of 360 degree on the tube wall of inner tube 2Cavity between equally distributed the first bloop 4, the first bloops 4 and outer tube 1 and inner tube 2Be connected, porous type pipeline configuration can reach good soundproof effect.
On the conical surface of outer tube 1 and inner tube 2 outlet sides, offer the second bloop 5, the second bloops 5Aperture be obviously greater than the aperture of the first bloop 4, by the second bloop 5, can make more gasBody passes through the silencing cotton between outer tube 1 and inner tube 2, thereby further improves noise elimination noise reduction effect,Can prevent from forming dead space, avoid gas can not flow in interlayer simultaneously.
Above-mentioned outer tube 1 and inner tube 2 are straight tube, and the angle of taper scope of the conical surface 3 can between the twoBe controlled between 75 °～145 °, the length of outer tube 1 is 3～5 times of inner tube 2 diameters, to guaranteeIt can fill enough silencing cottons.
By changing the perforate situation of inner two baffle plates of SCR catalytic muffler, can change gas flow sideTo, make air-flow pass through to flow out SCR catalytic muffler from escape pipe after catalyst, give vent to anger to mate this bilayerPipe, its air inlet and gas outlet can homonymy be arranged or heteropleural layout etc.
Please refer to Fig. 3, Fig. 4, Fig. 3 is the SCR catalytic muffler that air inlet pipe and escape pipe homonymy are arrangedStructural representation; Fig. 4 is the gas flow schematic diagram of the inside of SCR catalytic muffler shown in Fig. 3.
As shown in the figure, air inlet pipe 6 and the escape pipe 7 of this SCR catalytic muffler are positioned at the same side, outside itShell 8 inside by front shroud 9, front apron 10, backboard 11, back shroud 12 be separated into ante-chamber 13, inBetween chamber 14 and back cavity 15.
Escape pipe 7 extends to shell 8 inside, and it is parallel with air inlet pipe 6, and both length are suitable,The outlet side of air inlet pipe 6 is communicated with intermediate cavity 14, and wherein on front apron 10, perforate makes intermediate cavity 14 and frontChamber 13 is communicated with, and carrier (not in the drawings represent) is communicated with ante-chamber 13 and back cavity 15, ante-chamber 13 with carryThe inlet end of body is communicated with, and the outlet side of carrier is communicated with back cavity 15, the air inlet of back cavity 15 and escape pipe 6End is communicated with, not perforate of backboard 11, and intermediate cavity 14 and back cavity 15 are not directly communicated with.
Therefore gas flow is as shown by arrows in FIG.: air inlet → air inlet pipe 6 → intermediate cavity 14 → ante-chamber 13 →Carrier → back cavity 15 → escape pipe 7 → gas outlet.
Above-mentioned carrier is provided with catalyst, plays catalytic action, and for cylindrical, across intermediate cavity, wall is not saturatingGas, can only pass in and out gas from two ends.
Please refer to Fig. 5, Fig. 5 is the structure of the SCR catalytic muffler of air inlet pipe and escape pipe heteropleural layoutSchematic diagram.
As shown in the figure, enter the SCR catalytic muffler of air outlet structure for heteropleural, front apron 10 not perforates,Backboard 11 perforates, intermediate cavity 14 and back cavity 15 are directly communicated with, after gas is entered by intermediate cavity 14Behind chamber 15, arrive ante-chamber 13 by carrier, discharge SCR catalytic muffler through escape pipe 7 afterwards.
When work, gas flow direction is: air inlet → air inlet pipe 6 → intermediate cavity 14 → back cavity 15 → carryingBody → ante-chamber 13 → escape pipe 7 → gas outlet.
Above-mentioned escape pipe 7 is two-layer pipe filling sucting sound material, and this structure has good noise elimination meritCan, simultaneously by this structure applications to integrated form SCR catalytic muffler, by SCR catalytic mufflerWhether the perforate of middle two baffle plates changes the sequence of flow of tail gas in each region, mates various air inlet/outletsArrangement form, reaches good soundproof effect.
Certainly, above-described embodiment is only preferred version of the present invention, is specifically not limited to this, at this baseOn plinth, can make according to actual needs pointed adjustment, thereby obtain different embodiments. ExampleAs, the air inlet pipe of SCR catalytic muffler and escape pipe are arranged vertically, or make both there is a clampAngle etc. Because mode in the cards is more, just illustrate no longer one by one here.
Above SCR catalytic muffler provided by the present invention and escape pipe thereof are described in detail. ThisIn literary composition, apply specific case principle of the present invention and embodiment have been set forth, above embodiment'sIllustrate just for helping to understand core concept of the present invention. It should be pointed out that general for the artLogical technical staff, under the premise without departing from the principles of the invention, can also carry out some to the present inventionImprove and modify, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (7)
1. a SCR catalytic muffler escape pipe, comprises outer tube (1) and inner tube (2), described inThe two ends of inner tube (2) are connected by the conical surface (3) transition with the two ends of described outer tube (1) respectively,Filling sucting sound material in cavity between described outer tube (1) and inner tube (2), described inner tube (2)Tube wall on offer the first bloop (4) being communicated with described cavity; The described conical surface (3) is inner conical surface;On the conical surface (3) of described outer tube (1) and inner tube (2) outlet side, offer the second bloop (5);It is characterized in that, the aperture of described the second bloop (5) is greater than the aperture of described the first bloop (4).
2. SCR catalytic muffler escape pipe according to claim 1, is characterized in that, describedOne bloop (4) is uniformly distributed on the tube wall of described inner tube (2) within the scope of 360 degree.
3. SCR catalytic muffler escape pipe according to claim 2, is characterized in that, described outsideLayer pipe (1) and inner tube (2) are straight tube.
4. SCR catalytic muffler escape pipe according to claim 3, is characterized in that described coneThe angle of taper scope of face (3) is between 75 °～145 °.
5. a SCR catalytic muffler, comprises shell (8), air inlet pipe (6), carrier and escape pipe (7),It is characterized in that, described escape pipe (7) is the SCR catalysis described in the claims 1 to 4 any oneMuffler outlet piper.
6. SCR catalytic muffler according to claim 5, is characterized in that, described shell (8)Inside is divided into ante-chamber (13), intermediate cavity (14) and back cavity (15);
The outlet side of described air inlet pipe (6) is communicated with intermediate cavity (14), and described intermediate cavity (14) is with frontChamber (13) be communicated with, described ante-chamber (13) is communicated with the inlet end of carrier, the outlet side of described carrier and afterChamber (15) is communicated with, and described back cavity (15) is communicated with the inlet end of escape pipe (7);
The outlet side of the inlet end of described air inlet pipe (6) and escape pipe (7) is positioned at described shell (8)The same side.
7. SCR catalytic muffler according to claim 6, is characterized in that, described shell (8)Inside is divided into ante-chamber (13), intermediate cavity (14) and back cavity (15);
The outlet side of described air inlet pipe (6) is communicated with intermediate cavity (14), described intermediate cavity (14) with afterChamber (15) is communicated with, and described back cavity (15) is communicated with the inlet end of carrier, the outlet side of described carrier and frontChamber (13) is communicated with, and described ante-chamber (13) is communicated with the inlet end of escape pipe (7);
The outlet side of the inlet end of described air inlet pipe (6) and escape pipe (7) is positioned at described shell (8)Both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310727432.8A CN103742242B (en) | 2013-12-25 | 2013-12-25 | A kind of SCR catalytic muffler and escape pipe thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310727432.8A CN103742242B (en) | 2013-12-25 | 2013-12-25 | A kind of SCR catalytic muffler and escape pipe thereof |
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| Publication Number | Publication Date |
|---|---|
| CN103742242A CN103742242A (en) | 2014-04-23 |
| CN103742242B true CN103742242B (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310727432.8A Active CN103742242B (en) | 2013-12-25 | 2013-12-25 | A kind of SCR catalytic muffler and escape pipe thereof |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105257381B (en) * | 2015-09-30 | 2018-05-04 | 潍柴动力股份有限公司 | A kind of welding method of SCR system and its catalytic muffler and catalytic muffler |
| CN107905873A (en) * | 2017-11-15 | 2018-04-13 | 南京航空航天大学 | Meet the Novel heavy-truck after-treatment system and method for national 6th stage emission standard |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6267199B1 (en) * | 1999-10-15 | 2001-07-31 | Sound Ware Industry Co., Ltd. | Automobile exhaust tube |
| CN203098010U (en) * | 2013-03-01 | 2013-07-31 | 西安秦泰汽车配件有限公司 | Catalysis silencer |
| CN203347898U (en) * | 2013-07-08 | 2013-12-18 | 潍柴动力股份有限公司 | Integrated selective catalytic reduction (SCR) catalytic silencer |
| CN203717096U (en) * | 2013-12-25 | 2014-07-16 | 潍柴动力股份有限公司 | SCR (Selective Catalytic Reduction) catalysis silencer and exit pipe thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57102507A (en) * | 1980-12-16 | 1982-06-25 | Nippon Radiator Co Ltd | Muffler |
| KR100974589B1 (en) * | 2008-08-21 | 2010-08-06 | 현대자동차주식회사 | Muffler and exhaust apparatus provided with the same |
-
2013
- 2013-12-25 CN CN201310727432.8A patent/CN103742242B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6267199B1 (en) * | 1999-10-15 | 2001-07-31 | Sound Ware Industry Co., Ltd. | Automobile exhaust tube |
| CN203098010U (en) * | 2013-03-01 | 2013-07-31 | 西安秦泰汽车配件有限公司 | Catalysis silencer |
| CN203347898U (en) * | 2013-07-08 | 2013-12-18 | 潍柴动力股份有限公司 | Integrated selective catalytic reduction (SCR) catalytic silencer |
| CN203717096U (en) * | 2013-12-25 | 2014-07-16 | 潍柴动力股份有限公司 | SCR (Selective Catalytic Reduction) catalysis silencer and exit pipe thereof |
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| CN103742242A (en) | 2014-04-23 |
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