CN104696052A - SCR urea spray nozzle assembly for automobile internal combustion engine - Google Patents
SCR urea spray nozzle assembly for automobile internal combustion engine Download PDFInfo
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- CN104696052A CN104696052A CN201510101733.9A CN201510101733A CN104696052A CN 104696052 A CN104696052 A CN 104696052A CN 201510101733 A CN201510101733 A CN 201510101733A CN 104696052 A CN104696052 A CN 104696052A
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- nozzle
- spray nozzle
- pipe
- urea
- collet
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention discloses an SCR urea spray nozzle assembly for an automobile internal combustion engine. The spray nozzle assembly comprises a spray nozzle joint (1), a spray nozzle pipe (4) and a spray nozzle head (6), wherein the spray nozzle head (6) is mounted at the front end of the spray nozzle pipe (4); the spray nozzle joint (1) is mounted at the rear end of the spay nozzle pipe (4); the inner cavity of the spray nozzle pipe (4) is communicated with the inner cavities of the spray nozzle joint (1) and the spray nozzle head (6) respectively; a urea spray orifice (7) is formed in the front end of the spray nozzle head (6); a heat insulation sleeve (5) sleeves the spray nozzle pipe (4) and the spray nozzle head (6); a cavity (8) is formed between the heat insulation sleeve (5) and the spray nozzle pipe (4); an air joint (2) communicated with the cavity (8) is arranged at the upper side part of the heat insulation sleeve (5); a ring-shaped gap (9) is formed between the heat insulation sleeve (5) and the spray nozzle head (6); the cavity (8) is communicated with the ring-shaped gap (9). The spray nozzle assembly is simple in structure, can efficiently conduct cooling and heat insulation on urea solution, avoids the urea solution from generating gasification untimely, and prevents the urea solution from crystallization.
Description
Technical field
The present invention relates to a kind of nozzle arrangements, relate to a kind of SCR urea nozzle assembly of car combustion engine in particular, belong to diesel engine vent gas processing technology field.
Background technique
Selective catalytic reduction (SCR) is one of the most effective post-processing technology of minimizing car combustion engine NOx emission of generally acknowledging at present, it by spraying into a certain amount of aqueous solution of urea in engine exhaust pipe, aqueous solution of urea obtains reducing agent NH3 through pervaporation, pyrolysis and hydrolytic process again, NH3 carries out selective catalytic reduction reaction and NOx reduction is become N2 under the effect of catalyzer, thus realizes the object reducing NOx content in exhaust.
Chinese patent Authorization Notice No.: CN203347897U, authorized announcement date: on December 18th, 2013, name is called in the utility model patent of " a kind of SCR urea nozzle ", disclose a kind of SCR urea nozzle, comprise urea delivery pipe, the front end of urea delivery pipe is provided with urea nozzle, the rear portion of urea delivery pipe is provided with nozzle connection, the mixing chamber with urea delivery pipe UNICOM is provided with in urea nozzle, urea nozzle front-end face is provided with the urea spray orifice be communicated with mixing chamber, the joint of urea delivery pipe and urea nozzle is set with the thermal sleeve that its sidepiece is provided with through hole.This utility model patent not easily blocks, atomizing effect is good.But this utility model patent has following defect: one, in this model utility, thermal sleeve is shaping by machining, and thus its manufacturing cost is higher; Two, the urea spray orifice in this model utility and engine exhaust pipe and integrated form SCR catalytic muffler arrange to there is stricter requirement with mating, arranging and mating improper being easy to causes urea droplets be rebuffed thus cause urea crystals, thus be arranged on the structure adaptability of engine exhaust pipe or EGP to this nozzle poor, Applicable scope is narrower.
Summary of the invention
The object of the invention is to higher for existing SCR urea nozzle manufacturing cost, can not the problem such as layout demand of flexible adaptation outlet pipe and EGP, a kind of SCR urea nozzle assembly of car combustion engine is provided.
For achieving the above object, technical solution of the present invention is: a kind of SCR urea nozzle assembly of car combustion engine, comprise nozzle connection, nozzle pipe and nozzle tip, described nozzle tip is arranged on nozzle pipe front end, described nozzle connection is arranged on nozzle pipe rear end, the inner chamber of nozzle pipe respectively with the intracavity inter-connection of nozzle connection and nozzle tip, nozzle tip front end is provided with urea spray orifice, collet is arranged with outside described nozzle pipe and nozzle tip, cavity is formed between described collet and nozzle pipe, the upper lateral part of collet is provided with the pneumatic fitting be connected with cavity, annulus is formed between collet and nozzle tip, described cavity is connected with annulus.
Described nozzle pipe and collet all adopt tubing manufacture to process.
Described nozzle pipe, nozzle tip and collet are arranged with one heart.
Described collet outer wall is provided with thermal insulation layer.
Described thermal insulation layer is ceramic coating.
Described collet is provided with fitting seat.
compared with prior art, the invention has the beneficial effects as follows:
1, structure is simple, effectively can carry out cooling to urea liquid heat insulation, avoid the too early generating gasification of urea liquid, prevent urea liquid crystallization.Be arranged with collet outside nozzle pipe and nozzle tip in the present invention, form cavity between collet and nozzle pipe, the upper lateral part of collet is provided with the pneumatic fitting be connected with cavity, forms annulus between collet and nozzle tip, and cavity is connected with annulus; Car load pressurized air enters in cavity and annulus by pneumatic fitting, effectively can carry out cooling to the urea liquid in nozzle pipe and nozzle tip heat insulation, avoid urea liquid too early generating gasification in nozzle pipe and nozzle tip, prevent urea liquid crystallization, ensure that the jeting effect of urea liquid.
2, annulus is formed between collet and nozzle tip in the present invention, during work, cooled compressed air sprays from annulus, make in front end, annulus, cooled compressed air mixes with air fluid-mixing with the urea liquid ejected by urea spray orifice or urea, namely realize mixing with air fluid-mixing and cooled compressed air urea liquid or urea in nozzle tip outside, facilitate urea liquid atomization, reliability is high.
3, in the present invention, nozzle pipe and collet all adopt tubing manufacture, fabricating cost is lower, and nozzle pipe and collet can together with carry out bend pipe processing, nozzle pipe and collet can need according to actual arrangement the shape being bent into needs, thus make this injector assembly can on the engine exhaust pipe of various structure and preprocessor flexible arrangement, meet different engine exhaust pipe and arrange demand.
Accompanying drawing explanation
Fig. 1 is perspective view of the present invention.
Fig. 2 is sectional drawing of the present invention.
Fig. 3 is A place enlarged view in Fig. 2.
In figure: nozzle connection 1, pneumatic fitting 2, fitting seat 3, nozzle pipe 4, collet 5, nozzle tip 6, urea spray orifice 7, cavity 8, annulus 9.
Embodiment
Illustrate that the present invention is described in further detail with embodiment below in conjunction with accompanying drawing.
See Fig. 1 to Fig. 2, a kind of SCR urea nozzle assembly of car combustion engine, comprises nozzle connection 1, nozzle pipe 4 and nozzle tip 6, and described nozzle tip 6 is arranged on nozzle pipe 4 front end, and described nozzle connection 1 is arranged on nozzle pipe 4 rear end; The inner chamber of nozzle pipe 4 respectively with the intracavity inter-connection of nozzle connection 1 and nozzle tip 6, nozzle tip 6 front end is provided with urea spray orifice 7.During work, by nozzle connection 1 and nozzle pipe 4 supply nozzle head 6 urea liquid to be atomized or urea and air fluid-mixing, spouting by urea spray orifice 7.
See Fig. 2 to Fig. 3, be arranged with collet 5 outside described nozzle pipe 4 and nozzle tip 6, form cavity 8 between described collet 5 and nozzle pipe 4, the upper lateral part of collet 5 is provided with the pneumatic fitting 2 be connected with cavity 8; Form annulus 9 between collet 5 and nozzle tip 6, described cavity 8 is connected with annulus 9.Car load pressurized air enters in cavity 8 and annulus 9 by pneumatic fitting 2, thus make nozzle pipe 4 and nozzle tip 6 outside form annular cooling cavities, cooling is carried out to the urea liquid in nozzle pipe 4 and nozzle tip 6 or urea and air fluid-mixing heat insulation, avoid urea liquid or urea and air fluid-mixing too early generating gasification in nozzle pipe 4 and nozzle tip 6; Simultaneously, cooled compressed air sprays from annulus 9, in front end, annulus 9, cooled compressed air mixes with air fluid-mixing with the urea liquid ejected by urea spray orifice 7 or urea, namely realize mixing with air fluid-mixing and cooled compressed air urea liquid or urea in nozzle tip 6 outside, can promote that urea liquid is atomized.
See Fig. 2, described nozzle pipe 4, nozzle tip 6 and collet 5 are arranged with one heart.
See Fig. 2, described collet 5 outer wall is provided with thermal insulation layer.Further, described thermal insulation layer is ceramic coating.The heat that the contact area that thermal insulation layer can reduce collet 5 and engine exhaust pipe produces inputs and causes urea crystals.
See Fig. 1 to Fig. 2, described collet 5 is provided with fitting seat 3; The setting type of fitting seat 3 can change according to installing space, and in Fig. 1, fitting seat 3 is cylinder setting type.
See Fig. 1, in the present invention, nozzle pipe 4 and collet 5 all adopt tubing manufacture, and fabricating cost is lower; And nozzle pipe 4 and collet 5 can together with carry out bend pipe processing, make nozzle pipe 4 and collet 5 can need to be bent into according to actual arrangement the shape of needs, thus make this injector assembly can on the engine exhaust pipe of various structure and preprocessor flexible arrangement, meet different engine exhaust pipe and arrange demand.Nozzle connection 1 in the present invention and pneumatic fitting 2 are provided with the attachment portion be connected with flexible pipe, pipeline, flange etc., and this connection connects part and is generally pipe joint; Pipe joint makes the secure fit such as nozzle connection 1 or pneumatic fitting 2 and flexible pipe, makes flexible pipe etc. can not slippage, thus makes the card jail suits such as flexible pipe.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, said structure all should be considered as belonging to protection scope of the present invention.
Claims (6)
1. the SCR urea nozzle assembly of a car combustion engine, comprise nozzle connection (1), nozzle pipe (4) and nozzle tip (6), described nozzle tip (6) is arranged on nozzle pipe (4) front end, described nozzle connection (1) is arranged on nozzle pipe (4) rear end, the inner chamber of nozzle pipe (4) respectively with the intracavity inter-connection of nozzle connection (1) and nozzle tip (6), nozzle tip (6) front end is provided with urea spray orifice (7), it is characterized in that: outside described nozzle pipe (4) and nozzle tip (6), be arranged with collet (5), cavity (8) is formed between described collet (5) and nozzle pipe (4), the upper lateral part of collet (5) is provided with the pneumatic fitting (2) be connected with cavity (8), annulus (9) is formed between collet (5) and nozzle tip (6), described cavity (8) is connected with annulus (9).
2. the SCR urea nozzle assembly of a kind of car combustion engine according to claim 1, is characterized in that: described nozzle pipe (4) and collet (5) all adopt tubing manufacture to process.
3. the SCR urea nozzle assembly of a kind of car combustion engine according to claim 1, is characterized in that: described nozzle pipe (4), nozzle tip (6) and collet (5) are arranged with one heart.
4. the SCR urea nozzle assembly of a kind of car combustion engine according to claim 1, is characterized in that: described collet (5) outer wall is provided with thermal insulation layer.
5. the SCR urea nozzle assembly of a kind of car combustion engine according to claim 4, is characterized in that: described thermal insulation layer is ceramic coating.
6. the SCR urea nozzle assembly of a kind of car combustion engine according to claim 1, is characterized in that: described collet (5) is provided with fitting seat (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510101733.9A CN104696052A (en) | 2015-03-09 | 2015-03-09 | SCR urea spray nozzle assembly for automobile internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510101733.9A CN104696052A (en) | 2015-03-09 | 2015-03-09 | SCR urea spray nozzle assembly for automobile internal combustion engine |
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| Publication Number | Publication Date |
|---|---|
| CN104696052A true CN104696052A (en) | 2015-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510101733.9A Pending CN104696052A (en) | 2015-03-09 | 2015-03-09 | SCR urea spray nozzle assembly for automobile internal combustion engine |
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| CN (1) | CN104696052A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240095A (en) * | 2015-11-19 | 2016-01-13 | 大连海事大学 | SCR system self-oscillation pulse atomization nozzle applied to marine diesel engine |
| CN105386831A (en) * | 2015-12-10 | 2016-03-09 | 广西玉柴机器股份有限公司 | Nozzle in marine engine tail gas treatment system |
| CN106955593A (en) * | 2017-04-17 | 2017-07-18 | 西安西热锅炉环保工程有限公司 | A kind of two-fluid spray gun structure suitable for chimney flue type urea direct-injection pyrolytic process |
| CN107916973A (en) * | 2017-11-29 | 2018-04-17 | 东风商用车有限公司 | A kind of SCR urea sprays protection system |
| CN109939851A (en) * | 2017-11-14 | 2019-06-28 | 通用电气公司 | For the injection nozzle apparatus via the hole conveying reparation in propeller for turboprop casing |
| GB2600010A (en) * | 2020-09-14 | 2022-04-20 | Cummins Emission Solutions Inc | Lance injector assembly with heating element |
| US11534780B2 (en) | 2017-11-14 | 2022-12-27 | General Electric Company | Spray nozzle device for delivering a restorative coating through a hole in a case of a turbine engine |
| US11708777B2 (en) | 2019-06-26 | 2023-07-25 | Cummins Emission Solutions Inc. | Liquid only lance injector |
| US11745195B2 (en) | 2017-11-14 | 2023-09-05 | General Electric Company | Spray nozzle device for delivering a restorative coating through a hole in a case of a turbine engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101518766A (en) * | 2008-10-16 | 2009-09-02 | 阿尔博耐尔有限公司 | Dual-medium nozzle |
| CN202250315U (en) * | 2011-08-30 | 2012-05-30 | 浙江邦得利汽车环保技术有限公司 | Diesel engine SCR (Semiconductor Control Rectifier) atomizer for air assistant manner |
| CN203548032U (en) * | 2013-10-28 | 2014-04-16 | 十堰银轮汽车零部件有限公司 | Ejector assembly |
| CN104353567A (en) * | 2014-11-13 | 2015-02-18 | 河南海力特机电制造有限公司 | High pressure fine water mist spray gun for SNCR (selective non-catalytic reduction) denitration system |
| CN204552898U (en) * | 2015-03-09 | 2015-08-12 | 东风商用车有限公司 | A kind of SCR urea nozzle assembly of car combustion engine |
-
2015
- 2015-03-09 CN CN201510101733.9A patent/CN104696052A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101518766A (en) * | 2008-10-16 | 2009-09-02 | 阿尔博耐尔有限公司 | Dual-medium nozzle |
| CN202250315U (en) * | 2011-08-30 | 2012-05-30 | 浙江邦得利汽车环保技术有限公司 | Diesel engine SCR (Semiconductor Control Rectifier) atomizer for air assistant manner |
| CN203548032U (en) * | 2013-10-28 | 2014-04-16 | 十堰银轮汽车零部件有限公司 | Ejector assembly |
| CN104353567A (en) * | 2014-11-13 | 2015-02-18 | 河南海力特机电制造有限公司 | High pressure fine water mist spray gun for SNCR (selective non-catalytic reduction) denitration system |
| CN204552898U (en) * | 2015-03-09 | 2015-08-12 | 东风商用车有限公司 | A kind of SCR urea nozzle assembly of car combustion engine |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240095A (en) * | 2015-11-19 | 2016-01-13 | 大连海事大学 | SCR system self-oscillation pulse atomization nozzle applied to marine diesel engine |
| CN105386831A (en) * | 2015-12-10 | 2016-03-09 | 广西玉柴机器股份有限公司 | Nozzle in marine engine tail gas treatment system |
| CN106955593A (en) * | 2017-04-17 | 2017-07-18 | 西安西热锅炉环保工程有限公司 | A kind of two-fluid spray gun structure suitable for chimney flue type urea direct-injection pyrolytic process |
| CN109939851A (en) * | 2017-11-14 | 2019-06-28 | 通用电气公司 | For the injection nozzle apparatus via the hole conveying reparation in propeller for turboprop casing |
| US11534780B2 (en) | 2017-11-14 | 2022-12-27 | General Electric Company | Spray nozzle device for delivering a restorative coating through a hole in a case of a turbine engine |
| US11745195B2 (en) | 2017-11-14 | 2023-09-05 | General Electric Company | Spray nozzle device for delivering a restorative coating through a hole in a case of a turbine engine |
| CN107916973A (en) * | 2017-11-29 | 2018-04-17 | 东风商用车有限公司 | A kind of SCR urea sprays protection system |
| CN107916973B (en) * | 2017-11-29 | 2020-08-04 | 东风商用车有限公司 | SCR urea sprays protection system |
| US11708777B2 (en) | 2019-06-26 | 2023-07-25 | Cummins Emission Solutions Inc. | Liquid only lance injector |
| US11834979B2 (en) | 2019-06-26 | 2023-12-05 | Cummins Emission Solutions Inc. | Liquid only lance injector |
| GB2600010A (en) * | 2020-09-14 | 2022-04-20 | Cummins Emission Solutions Inc | Lance injector assembly with heating element |
| GB2600010B (en) * | 2020-09-14 | 2022-12-21 | Cummins Emission Solutions Inc | Lance injector assembly with heating element |
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Application publication date: 20150610 |