CN103147828A - Gas-liquid one-way mixing device for urea pump - Google Patents
Gas-liquid one-way mixing device for urea pump Download PDFInfo
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- CN103147828A CN103147828A CN2013100994370A CN201310099437A CN103147828A CN 103147828 A CN103147828 A CN 103147828A CN 2013100994370 A CN2013100994370 A CN 2013100994370A CN 201310099437 A CN201310099437 A CN 201310099437A CN 103147828 A CN103147828 A CN 103147828A
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Abstract
The invention discloses a gas-liquid one-way mixing device for a urea pump. The gas-liquid one-way mixing device comprises a shell; a mixing cavity is formed in the shell; one end of the mixing cavity is provided with a gas inlet, and the other end of the mixing cavity is a mixed liquid outlet; the shell is provided with a urea solution inlet corresponding to the mixing cavity; the mixing cavity is provided with a one-way valve which is sealed with the inner wall of the shell, at the end provided with the gas inlet; the one-way valve comprises a valve seat and a piston; the piston is arranged on the valve seat in a sealed way; and the piston reciprocates along the valve seat in the mixing cavity under the action of pressure difference from the gas inlet. The one-way valve is arranged in the mixing cavity of the gas-liquid one-way mixing device for the urea pump, and the piston of the one-way valve moves to reduce and eliminate urea crystallization accumulated in the mixing cavity and to ensure the normal operation of a selective catalytic reduction (SCR) after-treatment system.
Description
Technical field
The present invention relates to a kind of urea pump, relate in particular to the unidirectional mixing arrangement of a kind of gas-liquid for urea pump.
Background technique
At present, serious pollution of atmosphere has been supervened in the fast development of Motor Vehicle, presents region composite type characteristics.Many metropolitan pollution of atmosphere turn to coal smoke and automotive composite type to pollute by coal-smoke pollution, and the minority megalopolis has obviously shown photochemical smog type (being the motor-vehicle tail-gas type) pollution of atmosphere.Therefore, the research of Diesel Emission Control Technologies: and important and extremely urgent.
From the development of commercial car, diesel engine is its major impetus.Exhaust after treatment system in IV stage emission control mainly adopts SCR after-treatment system route.SCR(Selective Catalyst Reduction) refer to be arranged in diesel engine automobile air exhausting system, the NOx in diesel emission is catalysed and reduced into N
2And O
2Catalytic reduction device, select aqueous solution of urea as reducing agent, aqueous solution of urea is ejected in the outlet pipe of catalyzer upstream, hydrolysis is produced as CO under the effect of exhaust gas temperature and air-flow
2And ammonia.The SCR after-treatment system is urea due to what use.Urea crystalline polamer easily appears.More can produce crystallization when particularly urea mixes with gas.Cause the mixing chamber of mixing urea solution and gas, gateway or the nozzle of mixing chamber to be prone to obstruction, cause system normally to move.
Summary of the invention
The object of the present invention is to provide the unidirectional mixing arrangement of a kind of gas-liquid for urea pump, it can avoid the generation of mixing chamber, mixing chamber gateway and the crystallization of nozzle periphery urea liquid effectively, guarantee that the SCR after-treatment system normally moves, to solve the problem that exists when in prior art, the urea pump gas-liquid is unidirectional mixes.
For reaching this purpose, the present invention by the following technical solutions:
the unidirectional mixing arrangement of a kind of gas-liquid for urea pump, it comprises housing, offer mixing chamber in described housing, one end of described mixing chamber is the gas access, the other end is mixture export, and offer the urea liquid entrance on the position corresponding to mixing chamber on described housing, wherein, an end of offering the gas access on described mixing chamber is provided with the one-way valve that seals with inner walls, described one-way valve comprises valve seat and piston, described piston seal is arranged on valve seat, and move back and forth along valve seat under the effect of described piston pressure difference in mixing chamber and between the place, gas access.
Especially, be provided with pressure adjusting spring between the valve seat of described one-way valve and piston, regulate as required and order about the pressure size that piston moves.
Especially, described gas access, mixing chamber, mixture export and urea liquid entrance mix exposed to contact surface and all are processed into round and smooth flat configuration with urea, can prevent urea crystals.
Especially, the angle of described urea liquid entrance adopts vertically or any structure that enters tiltedly.
Especially, be provided with at least the two seals circle between described valve seat and housing and seal, described piston stretches between an end of mixing chamber and valve seat and is provided with seal ring.
Especially, described seal ring is " O " RunddichtringO.
Beneficial effect of the present invention is, compared with prior art be provided with one-way valve in the mixing chamber of the described unidirectional mixing arrangement of gas-liquid for urea pump, when the mixing chamber internal pressure during greater than the pressure of gas access end, the seal ring of one-way valve will seal piston, stop urea mixed solution to enter in gas circuit, during greater than the pressure in mixing chamber, the piston of one-way valve is opened when the pressure of gas access end, gas enters into mixing chamber, reaches the requirement that mixes with urea.Pass through simultaneously the motion of the piston of one-way valve, reach minimizing, remove the urea crystals effect that is deposited in mixing chamber, to guarantee the normal operation of SCR after-treatment system.
Description of drawings
Fig. 1 is the structural representation of the unidirectional mixing arrangement of gas-liquid that is used for urea pump that provides of the specific embodiment of the invention 1;
Fig. 2 is the structural representation of the unidirectional mixing arrangement of gas-liquid that is used for urea pump that provides of the specific embodiment of the invention 2.
Embodiment
Further illustrate technological scheme of the present invention below in conjunction with accompanying drawing and by embodiment.
Embodiment one:
See also shown in Figure 1ly, Fig. 1 is the structural representation of the unidirectional mixing arrangement of gas-liquid that is used for urea pump that provides of the specific embodiment of the invention 1.
in the present embodiment, the unidirectional mixing arrangement of a kind of gas-liquid for urea pump comprises housing 1, offer mixing chamber 2 in described housing 1, one end of described mixing chamber 2 is gas access 3, the other end is mixture export 4, and offer urea liquid entrance 5 on the position corresponding to mixing chamber 2 on described housing 1, described urea liquid entrance 5 adopts the structure that vertically enters mixing chamber 2, this structure makes the degree of gas-liquid mixed better, an end of offering gas access 3 on described mixing chamber 2 is provided with the one-way valve 6 with housing 1 inner wall sealing, described one-way valve 6 comprises valve seat 7 and piston 8, described piston 8 is by " O " RunddichtringO 9 and valve seat 7 are tightly connected together, being provided with twice " O " RunddichtringO 9 between described valve seat 7 and housing 1 seals, and be provided with pressure adjusting spring 10 between described valve seat 7 and piston 8, regulate as required and order about the pressure size that piston 8 moves, described gas access 3, mixing chamber 2, round and smooth flat configuration all is processed on the surface that mixture export 4 and urea liquid entrance 5 contact with urea mixed solution.
Embodiment two:
See also shown in Figure 2ly, Fig. 2 is the structural representation of the unidirectional mixing arrangement of gas-liquid that is used for urea pump that provides of the specific embodiment of the invention 2.
In the present embodiment, be that with embodiment one difference urea liquid entrance 5 enters the angle of mixing chamber 2, the structure that enters mixing chamber 2 under adopting tiltedly in this example, this structure is discharged gas-liquid after the interior mixing of mixing chamber 2 more smooth and easy.
During work, when mixing chamber 2 internal pressures during greater than the pressure of gas access 3 ends, the seal ring of one-way valve 6 will seal piston 8, stop urea mixed solution to enter in gas circuit, during greater than the pressure in mixing chamber 2, the piston 8 of one-way valve 6 is opened when the pressure of gas access 3 ends, and gas enters into mixing chamber 2, reach the requirement that mixes with urea, discharged by mixture export 4 after mixing.
In the mixing chamber of the above-mentioned unidirectional mixing arrangement of gas-liquid for urea pump, one-way valve 6 is set, the motion of the piston 8 by one-way valve 6 reaches minimizing, removes the urea crystals effect that is deposited in mixing chamber 2, to guarantee the normal operation of SCR after-treatment system.
Above embodiment has just set forth basic principle of the present invention and characteristic; the present invention is not limited by above-mentioned example; without departing from the spirit and scope of the present invention, the present invention also has various variations and change, and these variations and change all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (6)
1. unidirectional mixing arrangement of gas-liquid that is used for urea pump, it comprises housing, offer mixing chamber in described housing, one end of described mixing chamber is the gas access, the other end is mixture export, and offer the urea liquid entrance on the position corresponding to mixing chamber on described housing, it is characterized in that, an end of offering the gas access on described mixing chamber is provided with the one-way valve that seals with inner walls, described one-way valve comprises valve seat and piston, described piston seal is arranged on valve seat, and move back and forth along valve seat under the effect of described piston pressure difference in mixing chamber and between the place, gas access.
2. the unidirectional mixing arrangement of the gas-liquid for urea pump according to claim 1, is characterized in that, is provided with pressure adjusting spring between the valve seat of described one-way valve and piston.
3. the unidirectional mixing arrangement of the gas-liquid for urea pump according to claim 1, is characterized in that, described gas access, mixing chamber, mixture export and urea liquid entrance mix exposed to contact surface and all be processed into round and smooth flat configuration with urea.
4. the unidirectional mixing arrangement of the gas-liquid for urea pump according to claim 1, is characterized in that, the angle of described urea liquid entrance adopts vertically or any structure that enters tiltedly.
5. the unidirectional mixing arrangement of the gas-liquid for urea pump according to claim 1, it is characterized in that, at least be provided with the two seals circle between described valve seat and housing and seal, described piston stretches into end seal ring together with being provided with between valve seat of mixing chamber.
6. the unidirectional mixing arrangement of the gas-liquid for urea pump according to claim 5, is characterized in that, described seal ring is " O " RunddichtringO.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310099437.0A CN103147828B (en) | 2013-03-26 | 2013-03-26 | The unidirectional mixing arrangement of gas-liquid for urea pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310099437.0A CN103147828B (en) | 2013-03-26 | 2013-03-26 | The unidirectional mixing arrangement of gas-liquid for urea pump |
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| Publication Number | Publication Date |
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| CN103147828A true CN103147828A (en) | 2013-06-12 |
| CN103147828B CN103147828B (en) | 2016-08-17 |
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| CN201310099437.0A Active CN103147828B (en) | 2013-03-26 | 2013-03-26 | The unidirectional mixing arrangement of gas-liquid for urea pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285851A (en) * | 2016-09-22 | 2017-01-04 | 凯龙高科技股份有限公司 | A kind of dosing pump fluid path blow device |
| CN106593586A (en) * | 2016-11-29 | 2017-04-26 | 潍柴动力空气净化科技有限公司 | Urea injection device for engine SCR system |
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| DE102006019051A1 (en) * | 2006-04-25 | 2007-10-31 | Robert Bosch Gmbh | Device for supplying a reducing agent in an exhaust line of an internal combustion engine |
| US20090031714A1 (en) * | 2005-04-13 | 2009-02-05 | Hans Henrik Jochumsen | Mixing device for mixing urea and air |
| CN101493027A (en) * | 2009-01-14 | 2009-07-29 | 无锡市凯龙汽车设备制造有限公司 | Air mixing and metering system for processing vehicle exhaust |
| DE102009029473A1 (en) * | 2009-09-15 | 2011-03-24 | Robert Bosch Gmbh | Dosing module for a liquid reducing agent |
| CN202431344U (en) * | 2012-02-23 | 2012-09-12 | 苏州派格力减排***有限公司 | Selective catalytic reduction (SCR) mixing device for preventing urea from becoming crystallized |
| CN203130212U (en) * | 2013-03-26 | 2013-08-14 | 无锡市凯龙汽车设备制造有限公司 | One-way gas-liquid mixing device for urea pump |
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2013
- 2013-03-26 CN CN201310099437.0A patent/CN103147828B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090031714A1 (en) * | 2005-04-13 | 2009-02-05 | Hans Henrik Jochumsen | Mixing device for mixing urea and air |
| DE102006019051A1 (en) * | 2006-04-25 | 2007-10-31 | Robert Bosch Gmbh | Device for supplying a reducing agent in an exhaust line of an internal combustion engine |
| CN101493027A (en) * | 2009-01-14 | 2009-07-29 | 无锡市凯龙汽车设备制造有限公司 | Air mixing and metering system for processing vehicle exhaust |
| DE102009029473A1 (en) * | 2009-09-15 | 2011-03-24 | Robert Bosch Gmbh | Dosing module for a liquid reducing agent |
| CN202431344U (en) * | 2012-02-23 | 2012-09-12 | 苏州派格力减排***有限公司 | Selective catalytic reduction (SCR) mixing device for preventing urea from becoming crystallized |
| CN203130212U (en) * | 2013-03-26 | 2013-08-14 | 无锡市凯龙汽车设备制造有限公司 | One-way gas-liquid mixing device for urea pump |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285851A (en) * | 2016-09-22 | 2017-01-04 | 凯龙高科技股份有限公司 | A kind of dosing pump fluid path blow device |
| CN106593586A (en) * | 2016-11-29 | 2017-04-26 | 潍柴动力空气净化科技有限公司 | Urea injection device for engine SCR system |
| CN106593586B (en) * | 2016-11-29 | 2019-07-05 | 潍柴动力股份有限公司 | A kind of urea injection apparatus for engine SCR system |
Also Published As
| Publication number | Publication date |
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| CN103147828B (en) | 2016-08-17 |
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Address after: 214000 Jiangsu city in Wuxi Province Economic Development Zone Huishan Qianqiao Temple Tangqiao supporting area Applicant after: Kailong High Technology Co., Ltd. Address before: 214000 Jiangsu city in Wuxi Province Economic Development Zone Huishan District Wuxi Tangqiao temple bridge supporting money Kailong Automobile Equipment Manufacturing Co Ltd Applicant before: Wuxi Kailong Bus Equipment Manufacturing Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: KAILONG AUTOMOBILE EQUIPMENT MANUFACTURING CO., LTD., WUXI CITY TO: KAILONG HIGH TECHNOLOGY CO., LTD. |
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Denomination of invention: Gas liquid unidirectional mixing device for urea pump Effective date of registration: 20210727 Granted publication date: 20160817 Pledgee: Agricultural Bank of China Limited by Share Ltd. Wuxi Xishan branch Pledgor: KAILONG HIGH TECHNOLOGY Co.,Ltd. Registration number: Y2021320010276 |