CN103147828B - The unidirectional mixing arrangement of gas-liquid for urea pump - Google Patents
The unidirectional mixing arrangement of gas-liquid for urea pump Download PDFInfo
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- CN103147828B CN103147828B CN201310099437.0A CN201310099437A CN103147828B CN 103147828 B CN103147828 B CN 103147828B CN 201310099437 A CN201310099437 A CN 201310099437A CN 103147828 B CN103147828 B CN 103147828B
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Abstract
The invention discloses a kind of unidirectional mixing arrangement of the gas-liquid for urea pump, it includes housing, hybrid chamber is offered in described housing, one end of described hybrid chamber is gas access, the other end is mixture export, and corresponding to offering urea liquid entrance on the position of hybrid chamber on described housing, the one end offering gas access on described hybrid chamber is provided with the check valve sealed with inner walls, described check valve includes valve seat and piston, described piston seal is arranged on valve seat, and described piston in hybrid chamber with gas access between pressure differential effect under move back and forth along valve seat.It is provided with check valve in the hybrid chamber of the above-mentioned unidirectional mixing arrangement of the gas-liquid for urea pump, by the motion of the piston of check valve, reaches to reduce, remove the urea crystals effect being deposited in hybrid chamber, to ensure the properly functioning of SCR aftertreatment system.
Description
Technical field
The present invention relates to a kind of urea pump, particularly relate to a kind of unidirectional mixing arrangement of the gas-liquid for urea pump.
Background technology
At present, serious atmospheric pollution has been supervened in the fast development of motor vehicles, presents region composite type
Feature.Many metropolitan atmospheric pollution are turned to coal smoke and automotive composite type to pollute by coal-smoke pollution,
Minority megalopolis the most substantially shows photochemical fog type (i.e. motor-vehicle tail-gas type) atmospheric pollution.Cause
This, the research of Diesel Emission Control Technologies and important and extremely urgent.
From the point of view of the development of commercial car, diesel engine is its major impetus.Aerofluxus in stage iv emission control
After-treatment system mainly uses SCR aftertreatment 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 N2And O2
Catalytic reduction device, select aqueous solution of urea as reducing agent, aqueous solution of urea is ejected into catalyst upstream
Exhaustor in, under the effect of EGT and air-flow hydrolysis be produced as CO2And ammonia.SCR post processing system
System is owing to using carbamide.Carbamide crystalline polamer easily occurs.When particularly carbamide mixes with gas more
Crystallization can be produced.Mixing urea solution and the hybrid chamber of gas, the gateway of hybrid chamber or nozzle is caused easily to go out
Now block, cause the system cannot be properly functioning.
Summary of the invention
It is an object of the invention to provide a kind of unidirectional mixing arrangement of the gas-liquid for urea pump, it can be effectively
Avoid hybrid chamber, hybrid chamber gateway and the generation of nozzle periphery urea liquid crystallization, it is ensured that locate after SCR
Reason system is properly functioning, the problem existed during to solve the unidirectional mixing of urea pump gas-liquid in prior art.
For reaching this purpose, the present invention by the following technical solutions:
A kind of unidirectional mixing arrangement of the gas-liquid for urea pump, it includes housing, offers mixed in described housing
Closing chamber, one end of described hybrid chamber is gas access, and the other end is right on mixture export, and described housing
Urea liquid entrance should be offered on the position of hybrid chamber, wherein, described hybrid chamber offers gas access
One end be provided with and inner walls seal check valve, described check valve includes valve seat and piston, described work
Plug sealing is arranged on valve seat, and described piston in hybrid chamber with gas access between the effect of pressure differential
Lower move back and forth along valve seat.
Especially, between valve seat and the piston of described check valve, it is provided with pressure spring, as desired to regulation
Order about the pressure size that piston moves.
Especially, described gas access, hybrid chamber, mixture export and urea liquid entrance mix with carbamide
Close exposed to contact surface and be processed into round and smooth flat configuration, urea crystals can be prevented.
Especially, the angle of described urea liquid entrance uses vertical or the most lower any one structure entered.
Especially, seal at least provided with two seals circle between described valve seat and housing, described piston
Stretch into and between one end of hybrid chamber and valve seat, be provided with sealing ring.
Especially, described sealing ring is " O " RunddichtringO.
Beneficial effects of the present invention is, compared with prior art the described gas-liquid for urea pump unidirectional mixing dress
It is provided with check valve in the hybrid chamber put, when mixing the pressure that cavity pressure is more than gas access end, unidirectional
The sealing ring of valve will seal piston, stops urea mixed solution to enter in gas circuit, when the pressure of gas access end
During more than pressure in hybrid chamber, the piston of check valve is opened, and gas enters in hybrid chamber, reaches and urine
The requirement of element mixing.Simultaneously by the motion of the piston of check valve, reach to reduce, remove and be deposited in hybrid chamber
Interior urea crystals effect, to ensure the properly functioning of SCR aftertreatment system.
Accompanying drawing explanation
Fig. 1 is the knot of the unidirectional mixing arrangement of the gas-liquid for urea pump that the specific embodiment of the invention 1 provides
Structure schematic diagram；
Fig. 2 is the knot of the unidirectional mixing arrangement of the gas-liquid for urea pump that the specific embodiment of the invention 2 provides
Structure schematic diagram.
Detailed description of the invention
Further illustrate technical scheme below in conjunction with the accompanying drawings and by detailed description of the invention.
Embodiment one:
Referring to shown in Fig. 1, Fig. 1 is the gas-liquid for urea pump that the specific embodiment of the invention 1 provides
The structural representation of unidirectional mixing arrangement.
In the present embodiment, a kind of unidirectional mixing arrangement of the gas-liquid for urea pump includes housing 1, described housing 1
Inside offering hybrid chamber 2, one end of described hybrid chamber 2 is gas access 3, and the other end is mixture export 4,
And corresponding to offering urea liquid entrance 5, described urea liquid on the position of hybrid chamber 2 on described housing 1
Entrance 5 uses the structure vertically into hybrid chamber 2, and this structure makes the degree of gas-liquid mixed preferably, described mixed
The one end offering gas access 3 on conjunction chamber 2 is provided with and the check valve 6 of housing 1 inner wall sealing, described unidirectional
Valve 6 includes that valve seat 7 and piston 8, described piston 8 are sealed with valve seat 7 by " O " RunddichtringO 9 together
Connect, be provided with twice " O " RunddichtringO 9 between described valve seat 7 and housing 1 and seal, and described
Pressure spring 10 it is provided with, as desired to the pressure that piston 8 moves is ordered about in regulation between valve seat 7 and piston 8
Power size, described gas access 3, hybrid chamber 2, mixture export 4 and urea liquid entrance 5 and carbamide
The surface of mixed liquor contact is processed into round and smooth flat configuration.
Embodiment two:
Referring to shown in Fig. 2, Fig. 2 is the gas-liquid for urea pump that the specific embodiment of the invention 2 provides
The structural representation of unidirectional mixing arrangement.
In the present embodiment, the difference with embodiment one is that urea liquid entrance 5 enters the angle of hybrid chamber 2,
Using the most lower structure entering hybrid chamber 2 in this example, this structure is discharged after making gas-liquid mix in hybrid chamber 2
Smoothly.
During work, when in hybrid chamber 2, pressure is more than the pressure of gas access 3 end, the sealing of check valve 6
Circle will seal piston 8, stops urea mixed solution to enter in gas circuit, when the pressure of gas access 3 end is more than mixed
When closing the pressure in chamber 2, the piston 8 of check valve 6 is opened, and gas enters in hybrid chamber 2, reach with
The requirement of carbamide mixing, is discharged by mixture export 4 after mixing.
In the hybrid chamber of the above-mentioned unidirectional mixing arrangement of the gas-liquid for urea pump, check valve 6 is set, passes through check valve
The motion of the piston 8 of 6, reaches to reduce, remove the urea crystals effect being deposited in hybrid chamber 2, to ensure
SCR aftertreatment system properly functioning.
Above example simply elaborates ultimate principle and the characteristic of the present invention, and the present invention is not limited by above-mentioned example
System, without departing from the spirit and scope of the present invention, the present invention also has various change and change, these
Change and change both fall within scope of the claimed invention.Claimed scope is by appended power
Profit claim and equivalent thereof define.
Claims (5)
1., for the unidirectional mixing arrangement of gas-liquid of urea pump, it includes housing, offers in described housing
Hybrid chamber, one end of described hybrid chamber is gas access, and the other end is on mixture export, and described housing
Corresponding to offering urea liquid entrance on the position of hybrid chamber, it is characterised in that offer on described hybrid chamber
One end of gas access is provided with the check valve sealed with inner walls, and described check valve includes valve seat and piston,
Described piston seal is arranged on valve seat, and described piston in hybrid chamber with gas access between pressure differential
Effect under move back and forth along valve seat, the angle of described urea liquid entrance uses the most lower structure entered.
The unidirectional mixing arrangement of gas-liquid for urea pump the most according to claim 1, it is characterised in that
It is provided with pressure spring between valve seat and the piston of described check valve.
The unidirectional mixing arrangement of gas-liquid for urea pump the most according to claim 1, it is characterised in that
Described gas access, hybrid chamber, mixture export and urea liquid entrance mix exposed to contact with carbamide
Surface is processed into round and smooth flat configuration.
The unidirectional mixing arrangement of gas-liquid for urea pump the most according to claim 1, it is characterised in that
Sealing at least provided with two seals circle between described valve seat and housing, described piston stretches into hybrid chamber
Sealing ring together with being provided with between one end with valve seat.
The unidirectional mixing arrangement of gas-liquid for urea pump the most according to claim 4, it is characterised in that
Described sealing 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 |
|---|---|
| CN103147828A CN103147828A (en) | 2013-06-12 |
| CN103147828B true CN103147828B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| 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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Families Citing this family (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 |
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 | 苏州派格力减排系统有限公司 | 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2362024C1 (en) * | 2005-04-13 | 2009-07-20 | Грундфос Нонокс А/С | Mixing device for mixing of urea and air, engine comprising mixing device and transport vehicle |
-
2013
- 2013-03-26 CN CN201310099437.0A patent/CN103147828B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 | 苏州派格力减排系统有限公司 | 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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| CN103147828A (en) | 2013-06-12 |
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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 |
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