CN105003327A - SCR airless urea nozzle - Google Patents
SCR airless urea nozzle Download PDFInfo
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- CN105003327A CN105003327A CN201510493426.XA CN201510493426A CN105003327A CN 105003327 A CN105003327 A CN 105003327A CN 201510493426 A CN201510493426 A CN 201510493426A CN 105003327 A CN105003327 A CN 105003327A
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- nozzle
- urea
- scr
- nozzle body
- ball valve
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Abstract
The invention discloses an SCR airless urea nozzle. The SCR airless urea nozzle comprises a nozzle mounting seat and a nozzle body arranged on the nozzle mounting seat, and is characterized by further comprising a valve seat arranged at the front end of the nozzle body and a ball valve arranged in both the valve seat and the nozzle body, wherein the bottom of the ball valve is connected with the nozzle body through a compression spring; a sleeve is fixed on the outer sides of both the nozzle body and the valve seat; solenoid valve coil components sleeve the outer side of the sleeve; a plurality of spray orifices are formed in the top of the valve seat. When the solenoid valve coil components are powered on, the ball valve moves downwards to be opened, a urea water solution is sprayed out from the spray orifices; when the solenoid valve coil components are powered off, the ball valve moves upwards to be closed under the action of the restoring force of the compression spring. The SCR airless urea nozzle has the advantages of being simple in structure and low in manufacturing cost, and can realize emission of nitrogen oxides by a diesel engine without a compressed air source.
Description
Technical field
the present invention relates to the exhaust after treatment system technical field of diesel engine, be specifically related to a kind of SCR and assist urea nozzle without air.
Background technique
selective reduction catalysis (SCR) is the post-processing technology of the minimizing diesel engine discharged nitrous oxides of domestic main flow, a certain amount of aqueous solution of urea is sprayed in outlet pipe, aqueous solution of urea is through pervaporation, pyrolysis, hydrolysis obtains reducing agent ammonia, ammonia under catalyst action with nitrogen oxide generation chemical reaction, reduction of nitrogen oxide is become nitrogen, thus achieves reduction of discharging.The SCR system of main flow is that air assists urea injection system in the market, air assists urea injection system to need the parts such as source of compressed air and oil and water seperator, not only complex structure, manufacture cost is high, and do not have source of compressed air in LD-diesel, thus selective reduction catalysis reduction of discharging cannot be realized.
Summary of the invention
the present invention seeks to: provide one not only simple for structure, low cost of manufacture, and do not need to use the SCR of source of compressed air to assist urea nozzle without air.
technological scheme of the present invention is: a kind of SCR assists urea nozzle without air, comprise nozzle fitting seat, be located at the nozzle body on described nozzle fitting seat, be located at the valve seat of described nozzle body front end, and be located at the ball valve of described valve seat and described nozzle body inside, be connected with described nozzle body by Compress Spring bottom described ball valve, sleeve is fixed with outside described nozzle body and described valve seat, coil assemblies of solenoid valves is set with outside described sleeve, described valve seat top is provided with several spray orifices, when coil assemblies of solenoid valves energising, ball valve moves downward and opens, aqueous solution of urea sprays from spray orifice, when coil assemblies of solenoid valves power-off, ball valve moves upward and closes under the restoring force effect of Compress Spring.
as preferred technological scheme, described ball valve comprises the spheroid being located at described valve seat inside, and with the connecting rod that is connected of one bottom described spheroid, guiding gutter is provided with between described sleeve and described ball valve, described connecting rod is provided with at least one opening with described guiding gutter corresponding position, when coil assemblies of solenoid valves energising, described connecting rod drives spheroid to move downward, aqueous solution of urea enters connecting rod from nozzle body inner chamber, and enter guiding gutter from the opening connecting rod, finally spray from spray orifice.
as preferred technological scheme, be provided with the rapid pipe joint with its intracavity inter-connection bottom described nozzle fitting seat, described rapid pipe joint is connected with urea-spray pipe.
as preferred technological scheme, described nozzle fitting seat both sides are respectively equipped with mounting hole.
as preferred technological scheme, be provided with coil interface in described coil assemblies of solenoid valves side, described coil interface is connected with SCR aftertreatment system controller.
as preferred technological scheme, described spray orifice with valve seat top center for center of circle circumference is uniformly distributed, in the present invention the quantity of spray orifice and the distribution mode of spray orifice and SCR aftertreatment system urea-spray pressure match reasonable, aqueous solution of urea can be made fully to be atomized.
advantage of the present invention is:
1. SCR of the present invention assists urea nozzle not only simple for structure without air, and fabricating cost is low, and does not need source of compressed air, can realize the discharge reducing diesel engine nitrogen oxide;
2. SCR of the present invention assists urea nozzle to adopt elasticity coefficient to arrange rational Compress Spring without air, namely can effectively make ball valve close, and ball valve response when opening also can be made rapid, thus effective aqueous solution of urea that controls sprays from spray orifice;
3. SCR of the present invention assists urea nozzle to be fixed with sleeve outside described nozzle body and described valve seat without air, namely plays fixed nozzle body and valve seat effect, plays again the effect of sealing aqueous solution of urea.
Accompanying drawing explanation
below in conjunction with drawings and Examples, the invention will be further described:
fig. 1 is structural representation of the present invention;
fig. 2 is sectional view of the present invention;
wherein: 1 nozzle fitting seat, 2 nozzle bodies, 3 valve seats, 4 Compress Springs, 5 sleeves, 6 coil assemblies of solenoid valves, 7 spheroids, 8 connecting rods, 9 guiding gutters, 10 rapid pipe joints, 11 mounting holes, 12 coil interfaces.
Embodiment
embodiment: with reference to Fig. 1, shown in 2, a kind of SCR assists urea nozzle without air, comprise nozzle fitting seat 1, be located at the nozzle body 2 on nozzle fitting seat 1, be located at the valve seat 3 of nozzle body 2 front end, and be located at the ball valve of valve seat 3 and nozzle body 2 inside, be connected with nozzle body 2 by Compress Spring 4 bottom ball valve, sleeve 5 is fixed with outside nozzle body 2 and valve seat 3, coil assemblies of solenoid valves 6 is set with outside sleeve 5, valve seat 3 top is provided with several spray orifices, when coil assemblies of solenoid valves 6 is energized, ball valve moves downward and opens, aqueous solution of urea sprays from spray orifice, when coil assemblies of solenoid valves 6 power-off, ball valve moves upward and closes under the restoring force effect of Compress Spring.
ball valve of the present invention comprises the spheroid 7 being located at valve seat 3 inside, and with the connecting rod 8 that is connected of one bottom spheroid 7, guiding gutter 9 is provided with between sleeve 5 and ball valve, connecting rod 8 is provided with at least one opening with guiding gutter 9 corresponding position, when coil assemblies of solenoid valves 6 is energized, connecting rod 8 drives spheroid 7 to move downward, and aqueous solution of urea enters connecting rod 8 from nozzle body 2 inner chamber, and enter guiding gutter 9 from the opening connecting rod 8, finally spray from spray orifice.
be provided with the rapid pipe joint 10 with its intracavity inter-connection bottom nozzle fitting seat 1 of the present invention, rapid pipe joint 10 is connected with urea-spray pipe, is respectively equipped with mounting hole 11 in nozzle fitting seat 1 both sides simultaneously.
of the present inventionly be provided with coil interface 12 in coil assemblies of solenoid valves 6 side, coil interface 12 is connected with SCR aftertreatment system controller.
spray orifice of the present invention with valve seat 3 top center for center of circle circumference is uniformly distributed, the quantity of spray orifice and the distribution mode of spray orifice and SCR aftertreatment system urea-spray pressure match reasonable, aqueous solution of urea can be made fully to be atomized.
above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (6)
1. a SCR assists urea nozzle without air, comprise nozzle fitting seat, and the nozzle body be located on described nozzle fitting seat, it is characterized in that, described SCR assists urea nozzle also to comprise the valve seat being located at described nozzle body front end without air, and be located at the ball valve of described valve seat and described nozzle body inside, be connected with described nozzle body by Compress Spring bottom described ball valve, sleeve is fixed with outside described nozzle body and described valve seat, coil assemblies of solenoid valves is set with outside described sleeve, described valve seat top is provided with several spray orifices, when coil assemblies of solenoid valves energising, ball valve moves downward and opens, aqueous solution of urea sprays from spray orifice, when coil assemblies of solenoid valves power-off, ball valve moves upward and closes under the restoring force effect of Compress Spring.
2. SCR according to claim 1 assists urea nozzle without air, it is characterized in that, described ball valve comprises the spheroid being located at described valve seat inside, and with the connecting rod that is connected of one bottom described spheroid, guiding gutter is provided with between described sleeve and described ball valve, on described connecting rod, and be provided with at least one opening with described guiding gutter corresponding position, when coil assemblies of solenoid valves energising, described connecting rod drives spheroid to move downward, aqueous solution of urea enters connecting rod from nozzle body inner chamber, and enter guiding gutter from the opening connecting rod, finally spray from spray orifice.
3. SCR according to claim 1 assists urea nozzle without air, it is characterized in that, is provided with the rapid pipe joint with its intracavity inter-connection bottom described nozzle fitting seat, and described rapid pipe joint is connected with urea-spray pipe.
4. SCR according to claim 1 assists urea nozzle without air, it is characterized in that, described nozzle fitting seat both sides are respectively equipped with mounting hole.
5. SCR according to claim 1 assists urea nozzle without air, it is characterized in that, be provided with coil interface in described coil assemblies of solenoid valves side, described coil interface is connected with SCR aftertreatment system controller.
6. SCR according to claim 1 assists urea nozzle without air, it is characterized in that, described spray orifice with valve seat top center for center of circle circumference is uniformly distributed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510493426.XA CN105003327A (en) | 2015-08-12 | 2015-08-12 | SCR airless urea nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510493426.XA CN105003327A (en) | 2015-08-12 | 2015-08-12 | SCR airless urea nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105003327A true CN105003327A (en) | 2015-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510493426.XA Pending CN105003327A (en) | 2015-08-12 | 2015-08-12 | SCR airless urea nozzle |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201326444Y (en) * | 2008-12-23 | 2009-10-14 | 无锡油泵油嘴研究所 | SCR urea jet apparatus for exhaust post treatment of diesel engine |
| US20100186392A1 (en) * | 2008-09-30 | 2010-07-29 | Doug Cartwright | Urea injector nozzle |
| CN102108891A (en) * | 2010-09-08 | 2011-06-29 | 柳州源创电喷技术有限公司 | Electromagnetic valve type urea solution injector |
| CN202578855U (en) * | 2012-03-08 | 2012-12-05 | 湖北天雄科技有限公司 | Nozzle of selective catalyst reduction (SCR) injection system |
| CN103256106A (en) * | 2012-12-28 | 2013-08-21 | 湖南吉利汽车部件有限公司 | SCR (selective catalytic reduction) injection system without pneumatic assistance |
| CN204921110U (en) * | 2015-08-12 | 2015-12-30 | 清华大学苏州汽车研究院（吴江） | SCR does not have supplementary urea nozzle of air |
-
2015
- 2015-08-12 CN CN201510493426.XA patent/CN105003327A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100186392A1 (en) * | 2008-09-30 | 2010-07-29 | Doug Cartwright | Urea injector nozzle |
| CN201326444Y (en) * | 2008-12-23 | 2009-10-14 | 无锡油泵油嘴研究所 | SCR urea jet apparatus for exhaust post treatment of diesel engine |
| CN102108891A (en) * | 2010-09-08 | 2011-06-29 | 柳州源创电喷技术有限公司 | Electromagnetic valve type urea solution injector |
| CN202578855U (en) * | 2012-03-08 | 2012-12-05 | 湖北天雄科技有限公司 | Nozzle of selective catalyst reduction (SCR) injection system |
| CN103256106A (en) * | 2012-12-28 | 2013-08-21 | 湖南吉利汽车部件有限公司 | SCR (selective catalytic reduction) injection system without pneumatic assistance |
| CN204921110U (en) * | 2015-08-12 | 2015-12-30 | 清华大学苏州汽车研究院（吴江） | SCR does not have supplementary urea nozzle of air |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151028 |
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| RJ01 | Rejection of invention patent application after publication |