CN203717096U - SCR (Selective Catalytic Reduction) catalysis silencer and exit pipe thereof - Google Patents
SCR (Selective Catalytic Reduction) catalysis silencer and exit pipe thereof Download PDFInfo
- Publication number
- CN203717096U CN203717096U CN201320874176.0U CN201320874176U CN203717096U CN 203717096 U CN203717096 U CN 203717096U CN 201320874176 U CN201320874176 U CN 201320874176U CN 203717096 U CN203717096 U CN 203717096U
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- CN
- China
- Prior art keywords
- outlet pipe
- steam outlet
- scr catalytic
- communicated
- catalytic muffler
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- Withdrawn - After Issue
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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
Abstract
The utility model discloses an SCR (Selective Catalytic Reduction) catalysis silencer and an exit pipe thereof. The exit pipe comprises an outer layer pipe (1) and an inner layer pipe (2), wherein two ends of the inner layer pipe (2) are respectively in transition connection with two ends of the outer layer pipe (1) by conical surfaces (3); a sound absorption material is used for filling a cavity between the outer layer pipe (1) and the inner layer pipe (2); a first noise elimination hole (4) which is communicated with the cavity is formed in the pipe wall of the inner layer pipe (2). The exit pipe has a better noise elimination effect, and the noise elimination and noise elimination effects of the SCR catalysis silencer are obviously improved. The utility model also discloses an SCR catalysis silencer provided with the exit pipe.
Description
Technical field
The utility model relates to the steam outlet pipe for the treatment of of diesel exhaust technical field, particularly diesel SCR catalytic muffler.The utility model also relates to the SCR catalytic muffler that is provided with described steam outlet pipe.
Background technique
At present, environment is one of several large problems of the world today with polluting, and noise pollution has also more and more caused people's attention, and 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 function, is mainly divided into control unit, urea dosage device and catalytic reaction unit three parts.
The control unit of SCR system and the control unit of motor (ECU) integrate, mainly for carrying out SCR control strategy, and control urea dosage device according to sensor signals such as ambient temperature, delivery temperature, urea level, urea temperature, urea pressure, NOx concentration, spraying urea liquid is mapped in exhaust airstream according to demand at regular time and quantity.
Urea dosage device mainly comprises urea box, urea supply unit, urea-spray unit, heating module and connecting pipeline and circuit, guarantees abundant atomization and the decomposition of urea liquid.
Catalytic reaction unit (being SCR catalytic muffler) mainly comprises SCR catalyzer, carrier and encapsulation thereof, and being used for the main harmful components reduction of nitrogen oxide in diesel exhaust gas is nitrogen G&W.
During work, aqueous solution of urea sprays into outlet pipe or directly sprays in SCR catalytic muffler through urea nozzle, in 200 ℃ of above pyrolytic reactions that occur of temperature, produces ammonia (NH
3), ammonia reacts with the nitrogen oxide (NOx) in tail gas under the effect of catalyzer in SCR catalytic muffler, reaches the object of eliminating diesel engine vent 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 is just simply designed with one section of steam outlet pipe 2 ＇, directly from the outlet chamber of rear end, draw, can not decay the preferably noise of tail gas, that is to say, although SCR catalytic muffler itself has noise elimination function, its steam outlet pipe 2 ＇ can not play any noise elimination noise reduction effect, need further improvement.
Therefore, how further improving the noise elimination noise reduction effect of SCR catalytic muffler, is those skilled in the art's technical issues that need to address.
Model utility content
The first object of the present utility model is to provide a kind of SCR catalytic muffler steam outlet pipe.This steam outlet pipe has good noise elimination effect, can significantly improve the noise elimination noise reduction effect of SCR catalytic muffler.
The second object of the present utility model is to provide a kind of SCR catalytic muffler that is provided with described steam outlet pipe.
For achieving the above object, the utility model provides a kind of SCR catalytic muffler steam outlet pipe, comprise external pipe and inner tube, the two ends of described inner tube are connected by conical surface transition with the two ends of described external pipe respectively, filling sucting sound material in cavity between described external pipe and inner tube, offers the first bloop being communicated with described cavity on the tube wall of described inner tube.
Preferably, the described conical surface is inner conical surface.
Preferably, on the conical surface of described external pipe 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 on the tube wall of described inner tube within the scope of 360 degree.
Preferably, described external pipe 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 utility model also provides a kind of SCR catalytic muffler, comprises shell, suction tude, carrier and steam outlet pipe, and described steam outlet pipe is the SCR catalytic muffler steam outlet pipe described in above-mentioned any one.
Preferably, described enclosure is divided into ante-chamber, intermediate cavity and back cavity; The outlet side of described suction tude is communicated with intermediate cavity, and described intermediate cavity is communicated with ante-chamber, and described ante-chamber is communicated with the inlet end of carrier, and the outlet side of described carrier is communicated with back cavity, and described back cavity is communicated with the inlet end of steam outlet pipe; The inlet end of described suction tude and the outlet side of steam outlet pipe are 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 suction tude is communicated with intermediate cavity, and described intermediate cavity is communicated with back cavity, and described back cavity is communicated with the inlet end of carrier, and the outlet side of described carrier is communicated with ante-chamber, and described ante-chamber is communicated with the inlet end of steam outlet pipe; The inlet end of described suction tude and the outlet side of steam outlet pipe are positioned at the both sides of described shell.
The SCR catalytic muffler steam outlet pipe that the utility model provides is two-layer pipe, by the external pipe connecting by conical surface transition and inner tube, formed, wherein not perforate of external pipe, to guarantee sealability, inner tube arranges open-celled structure in the circumferential scope of 360 degree, i.e. the first bloop, by to first optimal design of bloop structure and the computational analysis of flowing dynamics, can reach good soundproof effect, filling sucting sound material in cavity in the middle of while external pipe and inner tube, the straight length of steam outlet pipe is longer, can fill more sound-absorbing material, therefore can effectively play the effect of noise elimination, can significantly improve the noise elimination noise reduction effect of SCR catalytic muffler.
In a kind of preferred version, on the conical surface of described external pipe and inner tube outlet side, offer the second bloop.By the second bloop is set, can make more gas by the silencing cotton between external pipe and inner tube, thereby further improve noise elimination noise reduction effect, can prevent from forming dead space simultaneously, avoid gas can not flow in interlayer.
The SCR catalytic muffler that the utility model provides is provided with described steam outlet pipe, and because described steam outlet pipe has above-mentioned technique effect, the SCR catalytic muffler that is provided with this steam outlet pipe also possesses corresponding technique effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing SCR catalytic muffler;
Fig. 2 provides the structural representation of SCR catalytic muffler steam outlet pipe for the utility model;
Fig. 3 is the structural representation of the SCR catalytic muffler of suction tude and steam outlet 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 suction tude and steam outlet pipe heteropleural layout.
In Fig. 1:
Suction tude 1 ＇ steam outlet pipe 2 ＇
In Fig. 2 to Fig. 5:
1. external pipe 2. inner tube 3. conical surface 4. first bloop 5. second bloop 6. suction tude 7. steam outlet pipe 8. shell 9. front shroud 10. front screen 11. backboard 12. back shroud 13. ante-chamber 14. intermediate cavity 15. back cavities
Embodiment
Core of the present utility model is to provide a kind of steam outlet pipe structure of double-deck straight length and the SCR catalytic muffler of integrated this steam outlet pipe, to reach the object of noise elimination noise reduction.
In order to make those skilled in the art person understand better the utility model scheme, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Please refer to Fig. 2, Fig. 2 provides the structural representation of SCR catalytic muffler steam outlet pipe for the utility model.
In a kind of embodiment, the SCR catalytic muffler steam outlet pipe that the utility model provides is double layer construction, mainly external pipe 1 and inner tube 2, consists of.
The two ends of inner tube 2 are with respect to the inside indentation certain distance of external pipe 1, and be connected by the conical surface 3 transition with the two ends of external pipe 1 respectively, filling sucting sound material in cavity in the middle of external pipe 1 and inner tube 2, as silencing cotton (not shown), on the tube wall of inner tube 2, within the scope of 360 degree, offer some equally distributed the first bloops 4, the first bloop 4 is connected with the cavity between external pipe 1 and inner tube 2, and porous type pipeline configuration can reach good soundproof effect.
On the conical surface of external pipe 1 and inner tube 2 outlet sides, offer the second bloop 5, the aperture of the second bloop 5 is obviously greater than the aperture of the first bloop 4, by the second bloop 5, can make more gas by the silencing cotton between external pipe 1 and inner tube 2, thereby further improve noise elimination noise reduction effect, can prevent from forming dead space, avoid gas can not flow in interlayer simultaneously.
Above-mentioned external pipe 1 and inner tube 2 are straight tube, and the angle of taper scope of the conical surface 3 can be controlled between 75 °～145 ° between the two, and the length of external pipe 1 is 3～5 times of inner tube 2 diameters, to guarantee that it can fill enough silencing cottons.
By changing the perforate situation of inner two baffle plates of SCR catalytic muffler, can change gas flow direction, make air-flow pass through from steam outlet pipe, to flow out SCR catalytic muffler after catalyzer, to mate this double-deck steam outlet pipe, its suction port and air outlet can homonymy be arranged or heteropleural layout etc.
Please refer to Fig. 3, Fig. 4, Fig. 3 is the structural representation of the SCR catalytic muffler of suction tude and steam outlet pipe homonymy layout; Fig. 4 is the gas flow schematic diagram of the inside of SCR catalytic muffler shown in Fig. 3.
As shown in the figure, suction tude 6 and the steam outlet pipe 7 of this SCR catalytic muffler are positioned at the same side, and its shell 8 inside are separated into ante-chamber 13, intermediate cavity 14 and back cavity 15 by front shroud 9, front screen 10, backboard 11, back shroud 12.
Steam outlet pipe 7 extends to shell 8 inside always, it is parallel with suction tude 6, and both length is suitable, the outlet side of suction tude 6 is communicated with intermediate cavity 14, and wherein on front screen 10, perforate is communicated with intermediate cavity 14 and ante-chamber 13, carrier (not representing in the drawings) is communicated with ante-chamber 13 and back cavity 15, be that ante-chamber 13 is communicated with the inlet end of carrier, the outlet side of carrier is communicated with back cavity 15, and back cavity 15 is communicated with the inlet end of steam outlet pipe 6, not perforate of backboard 11, intermediate cavity 14 and back cavity 15 are not directly communicated with.
Therefore gas flow as shown by arrows in FIG.: suction port → suction tude 6 → intermediate cavity 14 → ante-chamber 13 → carrier → back cavity, 15 → steam outlet pipe 7 → air outlet.
Above-mentioned carrier is provided with catalyzer, plays catalysis, and for cylindrical, across intermediate cavity, wall is airtight, can only pass in and out gas from two ends.
Please refer to Fig. 5, Fig. 5 is the structural representation of the SCR catalytic muffler of suction tude and steam outlet pipe heteropleural layout.
As shown in the figure, for heteropleural, enter the SCR catalytic muffler of air outlet structure, front screen 10 not perforates, backboard 11 perforates, intermediate cavity 14 and back cavity 15 are directly communicated with, and gas arrives ante-chamber 13 by carrier after entering back cavity 15 by intermediate cavity 14, discharge SCR catalytic muffler afterwards through steam outlet pipe 7.
During work, gas flow direction is: suction port → suction tude 6 → intermediate cavity 14 → back cavity 15 → carrier → ante-chamber, 13 → steam outlet pipe 7 → air outlet.
Above-mentioned steam outlet pipe 7 is two-layer pipe filling sucting sound material, this structure has good noise elimination function, simultaneously by this structure applications to integrated form SCR catalytic muffler, whether perforate by two baffle plates in the middle of SCR catalytic muffler changes tail gas in the sequence of flow in each region, mate various air inlet/outlet setting types, reach good soundproof effect.
Certainly, above-described embodiment is only preferred version of the present utility model, is specifically not limited to this, can make according to actual needs pointed adjustment on this basis, thereby obtains different mode of executions.For example, the suction tude of SCR catalytic muffler and steam outlet pipe are arranged vertically, or make both there is certain angle etc.Because mode in the cards is more, just illustrate no longer one by one here.
Above SCR catalytic muffler provided by the utility model and steam outlet pipe thereof are described in detail.Applied specific case herein principle of the present utility model and mode of execution are set forth, above embodiment's explanation is just for helping to understand core concept of the present utility model.Should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (10)
1. a SCR catalytic muffler steam outlet pipe, it is characterized in that, comprise external pipe (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 external pipe (1) respectively, filling sucting sound material in cavity between described external pipe (1) and inner tube (2), offers the first bloop (4) being communicated with described cavity on the tube wall of described inner tube (2).
2. SCR catalytic muffler steam outlet pipe according to claim 1, is characterized in that, the described conical surface (3) is inner conical surface.
3. SCR catalytic muffler steam outlet pipe according to claim 2, is characterized in that, on the conical surface (3) of described external pipe (1) and inner tube (2) outlet side, offers the second bloop (5).
4. SCR catalytic muffler steam outlet pipe according to claim 3, is characterized in that, the aperture of described the second bloop (5) is greater than the aperture of described the first bloop (4).
5. according to the SCR catalytic muffler steam outlet pipe described in claim 1 to 4 any one, it is characterized in that, described the first bloop (4) is uniformly distributed on the tube wall of described inner tube (2) within the scope of 360 degree.
6. SCR catalytic muffler steam outlet pipe according to claim 5, is characterized in that, described external pipe (1) and inner tube (2) are straight tube.
7. SCR catalytic muffler steam outlet pipe according to claim 6, is characterized in that, the angle of taper scope of the described conical surface (3) is between 75 °～145 °.
8. a SCR catalytic muffler, comprises shell (8), suction tude (6), carrier and steam outlet pipe (7), it is characterized in that, described steam outlet pipe (7) is the SCR catalytic muffler steam outlet pipe described in the claims 1 to 7 any one.
9. SCR catalytic muffler according to claim 8, 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 suction tude (6) is communicated with intermediate cavity (14), described intermediate cavity (14) is communicated with ante-chamber (13), described ante-chamber (13) is communicated with the inlet end of carrier, the outlet side of described carrier is communicated with back cavity (15), and described back cavity (15) is communicated with the inlet end of steam outlet pipe (7);
The outlet side of the inlet end of described suction tude (6) and steam outlet pipe (7) is positioned at the same side of described shell (8).
10. SCR catalytic muffler according to claim 8, 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 suction tude (6) is communicated with intermediate cavity (14), described intermediate cavity (14) is communicated with back cavity (15), described back cavity (15) is communicated with the inlet end of carrier, the outlet side of described carrier is communicated with ante-chamber (13), and described ante-chamber (13) is communicated with the inlet end of steam outlet pipe (7);
The outlet side of the inlet end of described suction tude (6) and steam outlet pipe (7) is positioned at the both sides of described shell (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320874176.0U CN203717096U (en) | 2013-12-25 | 2013-12-25 | SCR (Selective Catalytic Reduction) catalysis silencer and exit pipe thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320874176.0U CN203717096U (en) | 2013-12-25 | 2013-12-25 | SCR (Selective Catalytic Reduction) catalysis silencer and exit pipe thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203717096U true CN203717096U (en) | 2014-07-16 |
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ID=51156258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320874176.0U Withdrawn - After Issue CN203717096U (en) | 2013-12-25 | 2013-12-25 | SCR (Selective Catalytic Reduction) catalysis silencer and exit pipe thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203717096U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742242A (en) * | 2013-12-25 | 2014-04-23 | 潍柴动力股份有限公司 | SCR (Selective Catalytic Reduction) catalytic muffler and air outlet pipe thereof |
-
2013
- 2013-12-25 CN CN201320874176.0U patent/CN203717096U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103742242A (en) * | 2013-12-25 | 2014-04-23 | 潍柴动力股份有限公司 | SCR (Selective Catalytic Reduction) catalytic muffler and air outlet pipe thereof |
| CN103742242B (en) * | 2013-12-25 | 2016-05-11 | 潍柴动力股份有限公司 | A kind of SCR catalytic muffler and escape pipe thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140716 Effective date of abandoning: 20160511 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |