CN202467994U - Mixed section pipeline of SCR (Selective Catalytic Reduction) exhaust pipe - Google Patents
Mixed section pipeline of SCR (Selective Catalytic Reduction) exhaust pipe Download PDFInfo
- Publication number
- CN202467994U CN202467994U CN2012200393026U CN201220039302U CN202467994U CN 202467994 U CN202467994 U CN 202467994U CN 2012200393026 U CN2012200393026 U CN 2012200393026U CN 201220039302 U CN201220039302 U CN 201220039302U CN 202467994 U CN202467994 U CN 202467994U
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- China
- Prior art keywords
- urea nozzle
- urea
- connecting tube
- section pipeline
- nozzle
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Abstract
The utility model discloses a mixed section pipeline of an SCR (Selective Catalytic Reduction) exhaust pipe. The mixed section pipeline of the SCR exhaust pipe comprises a connecting pipe, wherein the pipe wall of the connecting pipe projects, so that a urea nozzle seat provided with a urea nozzle installation hole is formed; and a certain angle is formed between the central line of the urea nozzle installation hole and the axis of the connecting pipe. A urea nozzle is arranged on the urea nozzle installation hole, so that the thickness of a nozzle fixing end face is reduced, a spray hole of the urea nozzle projects out of the inner surface of a urea nozzle seat body, and presence of a narrow space is avoided, regions with eddy current or low gas flow rates are reduced, and the occurrence of urea crystallization or concretion phenomenon on the urea nozzle seat is prevented effectively.
Description
Technical field
The utility model relates to a kind of SCR outlet pipe mixing section pipeline.
Background technique
Some problems occurred in the SCR post-processing technology application process, urea crystals problem especially has influence on the reliability of SCR system, when serious even can bring problems such as the obstruction of motor connecting tube, fuel economy variation.The one of the main reasons that produces urea crystals is that outlet pipe layout or nozzle carrier design are unreasonable, as shown in Figure 1, and general outlet pipe is installed split type nozzle carrier through welding manner and realized fixing nozzle carrier and being connected of outlet pipe; The lower zone of local eddy currents or gas flow rate 11 after urea sprays into a little, occurs, the urea liquid spraying is assembled the wet wall of formation, heated moisture evaporation at this; Form crystallization; Crystalline solid is grown up gradually, stops up the urea atomization space, makes urea droplets can't accomplish atomization process.In addition, because urea-spray atomizing angle has certain requirement, and nozzle carrier needs the space when on outlet pipe, welding, and urea is sprayed onto on the nozzle carrier inwall sometimes, causes the generation of urea crystals or calculus phenomenon.
Summary of the invention
The technical problem that the utility model will solve provides a kind of SCR outlet pipe mixing section pipeline that effectively prevents urea crystals or calculus phenomenon.
For solving the problems of the technologies described above; SCR outlet pipe mixing section pipeline comprises connecting tube; Its structural feature is that the tube wall protuberance of connecting tube forms the urea nozzle seat that is provided with the urea nozzle mounting hole, and the center line of urea nozzle mounting hole and the axis of connecting tube are at an angle.
After adopting said structure; Urea nozzle is installed on the urea nozzle mounting hole; This kind structure decrease the fixing thickness of end face of nozzle, make the spray orifice of urea nozzle protrude from urea nozzle pedestal internal surface, avoid the existence of small space; Eddy current or the lower zone of gas flow rate appear in minimizing, thereby effectively prevent to form at urea nozzle seat place the generation of urea crystals or calculus phenomenon.
Said urea nozzle seat and connecting tube are cast into one, and the joint of urea nozzle seat and connecting tube is smooth cambered surface, have optimized the atomization space of urea, and have improved the conformity and the versatility of production.
Said urea nozzle seat is provided with fixedly end face of nozzle, and nozzle fixedly end face is provided with the urea nozzle mounting hole, the convenient urea nozzle of installing.
Said nozzle fixedly end face is provided with fixed hole, convenient fixedly urea nozzle.
The external diameter at the two ends of said connecting tube equals the internal diameter with the connecting tube that is attached thereto; During installation, SCR outlet pipe mixing section pipeline is inserted in the connecting tube of front and back, connect through welding manner; The reliability of raising system prevents to corrode the generation with gas leak phenomenon.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is done further explain:
Fig. 1 is the structural representation of traditional SCR outlet pipe mixing section pipeline;
Fig. 2 is the structural representation of the utility model;
Fig. 3 is the left view of Fig. 2.
Embodiment
As shown in Figures 2 and 3, SCR outlet pipe mixing section pipeline comprises connecting tube 1, and the tube wall of connecting tube 1 forms urea nozzle seat 2 to its oblique upper protuberance; Urea nozzle seat 2 is provided with fixedly end face 7 of nozzle; Nozzle fixedly end face 7 is provided with urea nozzle mounting hole 3, and the center line 4 of urea nozzle mounting hole 3 and the axis 5 of connecting tube 1 satisfy urea nozzle required special angle requirement is installed at an angle; Nozzle fixedly end face 7 is provided with three fixed holes 6, convenient fixedly urea nozzle.Connecting tube 1 is cast into one with urea nozzle seat 2; Forging type not only satisfies the Structural Design Requirement of urea nozzle seat 2 easily; Can also reduce the fixedly thickness of end face of urea nozzle seat 2, make the spray orifice of urea nozzle protrude from urea nozzle pedestal internal surface, urea nozzle seat 2 is smooth cambered surface with the joint of connecting tube 1; Optimize atomization space; Occur the lower zone of eddy current or gas flow rate after avoiding urea to spray into, and reduce urea and be sprayed onto the probability on nozzle carrier 2 inwalls, thereby effectively prevent the generation of urea crystals or calculus phenomenon.
The external diameter at the two ends of connecting tube 1 is less than the internal diameter with the connecting tube that is attached thereto, and during installation, in the connecting tube, connects through welding manner before and after SCR outlet pipe mixing section pipeline inserted, and improves the reliability of system, prevents to corrode the generation with gas leak phenomenon.
Connecting tube 1 is a straight tube in the present embodiment, only is a kind of form of connecting tube, and connecting tube can be other suitable shape, like bend pipe.
Claims (5)
1. SCR outlet pipe mixing section pipeline; Comprise connecting tube; The tube wall protuberance that it is characterized in that connecting tube (1) forms the urea nozzle seat (2) that is provided with urea nozzle mounting hole (3), and the center line (4) of urea nozzle mounting hole (3) and the axis (5) of connecting tube (1) are at an angle.
2. SCR outlet pipe mixing section pipeline according to claim 1 is characterized in that said urea nozzle seat (2) and connecting tube (1) are cast into one, and urea nozzle seat (2) is smooth cambered surface with the joint of connecting tube (1).
3. SCR outlet pipe mixing section pipeline according to claim 1 is characterized in that said urea nozzle seat (2) is provided with fixedly end face (7) of nozzle, and nozzle fixedly end face (7) is provided with urea nozzle mounting hole (3).
4. SCR outlet pipe mixing section pipeline according to claim 3, it is characterized in that said nozzle fixedly end face (7) be provided with fixed hole (6).
5. according to each described SCR outlet pipe mixing section pipeline of claim 1 to 4, the external diameter at two ends that it is characterized in that said connecting tube (1) is less than the internal diameter with the connecting tube that is attached thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200393026U CN202467994U (en) | 2012-02-08 | 2012-02-08 | Mixed section pipeline of SCR (Selective Catalytic Reduction) exhaust pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200393026U CN202467994U (en) | 2012-02-08 | 2012-02-08 | Mixed section pipeline of SCR (Selective Catalytic Reduction) exhaust pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202467994U true CN202467994U (en) | 2012-10-03 |
Family
ID=46916158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200393026U Expired - Lifetime CN202467994U (en) | 2012-02-08 | 2012-02-08 | Mixed section pipeline of SCR (Selective Catalytic Reduction) exhaust pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202467994U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106948913A (en) * | 2017-03-27 | 2017-07-14 | 安徽江淮汽车集团股份有限公司 | A kind of exhaust gas processing device and blast pipe for being convenient to clean urea crystals thing |
-
2012
- 2012-02-08 CN CN2012200393026U patent/CN202467994U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106948913A (en) * | 2017-03-27 | 2017-07-14 | 安徽江淮汽车集团股份有限公司 | A kind of exhaust gas processing device and blast pipe for being convenient to clean urea crystals thing |
| CN106948913B (en) * | 2017-03-27 | 2018-12-14 | 安徽江淮汽车集团股份有限公司 | A kind of exhaust gas processing device and exhaust pipe being convenient to clean urea crystals object |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121003 |
|
| CX01 | Expiry of patent term |