CN102828804A - Urea ejector capable of forming vortex - Google Patents
Urea ejector capable of forming vortex Download PDFInfo
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- CN102828804A CN102828804A CN2012103791890A CN201210379189A CN102828804A CN 102828804 A CN102828804 A CN 102828804A CN 2012103791890 A CN2012103791890 A CN 2012103791890A CN 201210379189 A CN201210379189 A CN 201210379189A CN 102828804 A CN102828804 A CN 102828804A
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- urea
- spray
- needle
- valve body
- chamber
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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
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Exhaust Gas After Treatment (AREA)
Abstract
The invention relates to a urea ejector capable of forming a vortex. The urea ejector comprises an ejector body, a needle valve body, a urea solution inlet passage, an ejection hole body and a urea solution inlet pipe joint. The improvement of the invention is as follows: a structural body capable of forming the vortex is arranged between the ejection hole body and the ejector body to ensure that the urea solution is ejected in the form of the vortex. The urea ejector disclosed by the invention has the beneficial technical effects that under the condition that other peripheral devices are not changed, the ejection atomization quality of the urea water solution is improved; the treatment effect of vehicle exhaust is improved; the structure is simple; and the application range is wide.
Description
Technical field
The present invention relates to a kind of automobile exhaust gas processing apparatus, relate in particular to a kind of urea-spray device that forms eddy current.
Background technique
Vehicle exhaust is the one of the main reasons of environmental pollution, and therefore, how reducing the environmental pollution that vehicle exhaust causes is the human problem that faces jointly.
Automobile exhaust gas processing apparatus commonly used generally adopts urea to come tail gas is handled, and the problem of its existence is: the jet atomization of existing urea-spray device is second-rate, and the utilization ratio of aqueous solution of urea is low, to the poor processing effect of vehicle exhaust.In addition; Needle-valve body on the urea-spray device is relatively poor with the sealing of spraying hole body, and tracing it to its cause mainly is to be caused by needle-valve body long term wear needle-valve body that causes and the reduction to neutrality of spraying between the hole body, and; During fabrication; In order to guarantee sealing effect, needle-valve body is very high with the assembly precision requirement of spraying hole body, causes manufacturing efficiency low.
At present; In the fuel injection technology of vehicular engine,, generally be provided with the structure that is used to produce eddy current on the fuel injector in order to improve the jet atomization quality of fuel oil; So that fuel oil sprays with the eddy current form; Improve combustion efficiency, can not directly be used to solve the relatively poor problem of urea-spray atomization quality but being used in this type device produces the structure of eddy current, its reason is:
On the fuel injector, for the atomizing effect that makes fuel oil reaches best, the structure that generally will be used to produce eddy current is provided with comparatively complicatedly; Why can use the structure of complicacy like this, the high oil pressure when depending on fuel injection is used for the fuel-injected oil pressure and is generally 20Mpa; But the jet pressure of urea-spray device that is used for vent gas treatment is lower, and its pressure generally is no more than 0.9Mpa, if the labyrinth that is used for producing eddy current on the fuel injector is applied directly to the urea-spray device; Not only can not increase the jeting effect of urea; Can cause the pressure loss in the urea-spray process because of complex structure on the contrary, the pressure of the urea of ejection is significantly reduced; Atomization quality when this not only can not improve urea-spray; Atomization quality is reduced, reduce the utilization ratio of aqueous solution of urea, also poorer to the treatment effect of vehicle exhaust.Because the design of existing other car-mounted devices is ripe relatively with structure, therefore, can not be rashly the jet pressure of urea liquid be increased, and there is not positive correlation in the quality of the jet pressure of urea liquid size and vent gas treatment effect yet.
Summary of the invention
In order to solve the technical problem that exists in the background technique; The present invention proposes a kind of urea-spray device that forms eddy current; Comprise: injector body, needle-valve body, urea liquid inlet channel, injection hole body and urea liquid inlet pipe joint; Its improvement is: spray hole body and be arranged at the injector body bottom, the injector body lower end is provided with annular protrusion;
The annular protrusion lower end surface contacts with injection hole body upper-end surface; The joint that annular protrusion will spray hole body and injector body is divided into two chambers; The inner chamber of annular protrusion forms spray chamber, and the outside chamber of annular protrusion forms admission chamber, and annular protrusion is provided with a plurality of arcuate sockets; Arcuate socket runs through annular protrusion, and the bending direction of a plurality of arcuate sockets is identical;
Spray chamber top is communicated with the endoporus of injector body, and the spray chamber bottom is communicated with spray orifice on spraying hole body, and endoporus, spray chamber, the coaxial setting of spray orifice three;
The urea liquid inlet channel is arranged at injector body inside, and urea liquid inlet pipe joint is arranged on the outer wall of injector body, and the urea liquid inlet channel is inner to be communicated with admission chamber, and urea liquid inlet channel outer end is communicated with urea liquid inlet pipe joint;
Needle-valve body is arranged in the endoporus of injector body, and is slidingly connected between injector body and the needle-valve body;
When the needle-valve body lower end contacts with the injection hole body, isolate each other between spray chamber and the spray orifice, when separate with the injection hole body needle-valve body lower end, be interconnected between spray chamber and the spray orifice;
When being interconnected between spray chamber and the spray orifice; Urea liquid gets in the spray chamber through arcuate socket; And in spray chamber, forming eddy current, final aqueous solution of urea sprays from spray orifice with the eddy current form, and the atomization quality of aqueous solution of urea is improved; Thereby make urea combine more fully, improve the quality and the efficient of vent gas treatment with tail gas.
In order to solve the problem of the sealing reduction that brings because of the needle-valve body wearing and tearing, the present invention has also done following improvement: the bottom of needle-valve body is provided with directional post, and the needle-valve body external diameter at directional post place cooperates with the inner bore diameter clearance of injector body; The needle-valve body at directional post place is provided with a plurality of spiral chutes, and spiral chute is communicated with the upper-end surface and the lower end surface of directional post; Hole for back flow on the needle-valve body is arranged near directional post top (also be provided with hole for back flow on the existing needle-valve body, but its position is positioned at generally the apical location of needle-valve body, hole for back flow is communicated with the endoporus of needle-valve body).After adopting this improvement project, when needle-valve body contacted with the injection hole body, urea liquid can only reflux to needle-valve body top through the spiral chute on the directional post; Fluid pressure just produces a spiral active force to needle-valve body, and under this active force effect, needle-valve body can circumferentially be made one-way rotation around it; Even some part on the needle-valve body is worn, needle-valve body is well contacted with the injection hole body, improve sealing; Simultaneously; After adopting this structure, in the time of can reducing manufacturing articles needle-valve body and spray between the hole body to neutral required precision, enhance productivity.
In order further to improve jeting effect, the present invention has also done following improvement: the Hand of spiral of the helical structure body that a plurality of arcuate sockets arrangements form and spiral fluted Hand of spiral are in the same way.When needle-valve body contacts with the injection hole body; Urea liquid can only reflux to needle-valve body top through the spiral chute on the directional post; In the reflux course, the endoporus that the liquid below the hole for back flow height on the needle-valve body just is trapped in injector body has suffered, when needle-valve body is opened again; The liquid of this part delay again can along spiral chute downwards the direction of spray orifice flow; Under the spiral fluted leading role, the liquid of this part delay will produce certain eddy current (being designated as the A eddy current) in dirty process, because the Hand of spiral of arcuate socket and spiral fluted Hand of spiral are in the same way; The A eddy current just to having played certain humidification by the formed eddy current of arcuate socket, further improves jeting effect;
Useful technique effect of the present invention is: under the condition that does not change other peripheral units, improves the jet atomization quality of aqueous solution of urea, improved the treatment effect of vehicle exhaust, and simple in structure, widely applicable.
Description of drawings
Fig. 1, structural representation of the present invention (arrow is depicted as the urea solution flows direction among the figure);
The lower end surface structural representation of Fig. 2, injector body;
The schematic perspective view of Fig. 3, injector body;
The structural representation of Fig. 4, needle-valve body;
Among the figure: injector body 1, annular protrusion 1-1, needle-valve body 2, directional post 2-1, spiral chute 2-2, urea liquid inlet channel 3 sprays hole body 4, spray orifice 4-1, urea liquid inlet pipe joint 5, spray chamber 6, admission chamber 7.
Embodiment
Structure of the present invention is: comprising: injector body 1, needle-valve body 2, urea liquid inlet channel 3, injection hole body 4 and urea liquid inlet pipe joint 5, and its improvement is: spray hole body 4 and be arranged at injector body 1 bottom, injector body 1 lower end is provided with annular protrusion 1-1; Annular protrusion 1-1 lower end surface contacts with injection hole body 4 upper-end surfaces; The joint that annular protrusion 1-1 will spray hole body 4 and injector body 1 is divided into two chambers; The inner chamber of annular protrusion 1-1 forms spray chamber 6, and the outside chamber of annular protrusion 1-1 forms admission chamber 7, and annular protrusion 1-1 is provided with a plurality of arcuate sockets; Arcuate socket runs through annular protrusion 1-1, and the bending direction of a plurality of arcuate sockets is identical; Spray chamber 6 tops are communicated with the endoporus of injector body 1, and spray chamber 6 bottoms are communicated with spray orifice 4-1 on spraying hole body 4, and endoporus, spray chamber 6, the coaxial setting of spray orifice 4-1 three; Urea liquid inlet channel 3 is arranged at injector body 1 inside, and urea liquid inlet pipe joint 5 is arranged on the outer wall of injector body 1, and urea liquid inlet channel 3 the inners are communicated with admission chamber 7, and urea liquid inlet channel 3 outer ends are communicated with urea liquid inlet pipe joint 5; Needle-valve body 2 is arranged in the endoporus of injector body 1, and is slidingly connected between injector body 1 and the needle-valve body 2; When needle-valve body 2 lower ends contacted with injection hole body 4, (needle-valve body 2 was provided with back fluid passage, and when isolating each other between spray chamber 6 and the spray orifice 4-1, urea flows back in the container through returning fluid passage in isolation each other between spray chamber 6 and the spray orifice 4-1; Returning fluid passage is communicated with injector body 1 endoporus through hole for back flow), when separate with injection hole body 4 needle-valve body 2 lower ends, be interconnected between spray chamber 6 and the spray orifice 4-1; When being interconnected between spray chamber 6 and the spray orifice 4-1, aqueous solution of urea gets in the spray chamber 6 through arcuate socket, and in spray chamber 6, forms eddy current, and final aqueous solution of urea sprays from spray orifice 4-1 with the eddy current form.
The peripheral unit relevant with the present invention also has: be used to control the solenoid valve assembly of needle-valve body 2 actions, the pump arrangement that is used for the container of splendid attire urea and jet pressure is provided for urea liquid; The solenoid valve assembly is arranged at injector body 1 top, and is in transmission connection with needle-valve body 2; The container of splendid attire urea is communicated with the urea liquid inlet pipe joint 5 and the fluid passage that returns on the needle-valve body 2 respectively; Pump arrangement is arranged between the container and urea liquid inlet pipe joint 5 of splendid attire urea, for urea provides pressure.
Further, the bottom of said needle-valve body 2 is provided with directional post 2-1, and needle-valve body 2 external diameters at directional post 2-1 place cooperate with the inner bore diameter clearance of injector body 1; The needle-valve body 2 at directional post 2-1 place is provided with a plurality of spiral chute 2-2, and spiral chute 2-2 is communicated with upper-end surface and the lower end surface of directional post 2-1; Hole for back flow on the needle-valve body 2 is arranged at directional post 2-1 top.Needle-valve body 2 is provided with back fluid passage; Returning fluid passage is the endoporus of needle-valve body 2, goes back to the fluid passage lower end and is communicated with injector body 1 endoporus through hole for back flow, when needle-valve body 2 seals spray orifice 4-1; Urea just flows into back in the fluid passage through hole for back flow, and finally gets back in the container of splendid attire urea; Spiral chute 2-2 is under the fluid pressure effect of the urea liquid that refluxes; Just needle-valve body 2 is produced a circumferential active force; Thereby make needle-valve body 2 can intermittently do circumferential unidirectional rotation, avoid the needle-valve body 2 that causes because of wearing and tearing and spray the problem between the hole body 4 neutrality reduction and sealing reduction;
In order further to improve the effect of spraying, the present invention has also done following improvement: the Hand of spiral of the helical structure body that a plurality of arcuate sockets arrangements form and the Hand of spiral of spiral chute 2-2 are in the same way.After adopting this improvement project; When needle-valve body 2 contacted with injection hole body 4, urea liquid can only reflux to needle-valve body 2 tops through the spiral chute 2-2 on the directional post 2-1, in the reflux course; The endoporus that liquid below the hole for back flow height on the needle-valve body 2 just is trapped in injector body 1 has suffered; When needle-valve body 2 is opened again, the liquid of this part delay again can along spiral chute 2-2 downwards the direction of spray orifice flow, under the leading role of spiral chute 2-2; The liquid of this part delay will produce certain eddy current (being designated as the A eddy current) in dirty process; Because the Hand of spiral of arcuate socket and the Hand of spiral of spiral chute 2-2 are in the same way, the A eddy current just to having played certain humidification by the formed eddy current of arcuate socket, further improves jeting effect;
In the actual production; The difficulty of processing arcuate socket is higher; The inventor has adopted flexible mode; Promptly on annular protrusion 1-1 lower end surface, process curve bath (see among Fig. 3 shown in the mark B), when annular protrusion 1-1 with spray hole body 4 and contact after, the passage that curve bath surrounded that sprays on hole body 4 and the annular protrusion 1-1 has promptly formed arcuate socket.
Claims (3)
1. urea-spray device that can form eddy current; Comprise: injector body (1), needle-valve body (2), urea liquid inlet channel (3), injection hole body (4) and urea liquid inlet pipe joint (5); It is characterized in that: spray hole body (4) and be arranged at injector body (1) bottom, injector body (1) lower end is provided with annular protrusion (1-1);
Annular protrusion (1-1) lower end surface contacts with injection hole body (4) upper-end surface; The joint that annular protrusion (1-1) will spray hole body (4) and injector body (1) is divided into two chambers; The inner chamber of annular protrusion (1-1) forms spray chamber (6), and the outside chamber of annular protrusion (1-1) forms admission chamber (7), and annular protrusion (1-1) is provided with a plurality of arcuate sockets; Arcuate socket runs through annular protrusion (1-1), and the bending direction of a plurality of arcuate sockets is identical;
Spray chamber (6) top is communicated with the endoporus of injector body (1), and spray chamber (6) bottom is communicated with spray orifice (4-1) on spraying hole body (4), and endoporus, spray chamber (6), the coaxial setting of spray orifice (4-1) three;
Urea liquid inlet channel (3) is arranged at injector body (1) inside; Urea liquid inlet pipe joint (5) is arranged on the outer wall of injector body (1); Urea liquid inlet channel (3) is inner to be communicated with admission chamber (7), and urea liquid inlet channel (3) outer end is communicated with urea liquid inlet pipe joint (5);
Needle-valve body (2) is arranged in the endoporus of injector body (1), and is slidingly connected between injector body (1) and the needle-valve body (2);
When needle-valve body (2) lower end with spray hole body (4) when contact, isolation each other between spray chamber (6) and the spray orifice (4-1) when needle-valve body (2) lower end and injection hole body (4) when separating, is interconnected between spray chamber (6) and the spray orifice (4-1);
When being interconnected between spray chamber (6) and the spray orifice (4-1), aqueous solution of urea gets in the spray chamber (6) through arcuate socket, and in spray chamber (6), forms eddy current, and final aqueous solution of urea sprays from spray orifice (4-1) with the eddy current form.
2. the urea-spray device that forms eddy current according to claim 1; It is characterized in that: the bottom of said needle-valve body (2) is provided with directional post (2-1), and needle-valve body (2) external diameter that directional post (2-1) is located cooperates with the inner bore diameter clearance of injector body (1); The needle-valve body (2) that directional post (2-1) is located is provided with a plurality of spiral chutes (2-2), and spiral chute (2-2) is communicated with the upper-end surface and the lower end surface of directional post (2-1); Hole for back flow on the needle-valve body (2) is arranged at directional post (2-1) top.
3. the urea-spray device that forms eddy current according to claim 2 is characterized in that: the Hand of spiral of the helical structure body that a plurality of arcuate sockets arrangements form and the Hand of spiral of spiral chute (2-2) are in the same way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103791890A CN102828804A (en) | 2012-10-09 | 2012-10-09 | Urea ejector capable of forming vortex |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103791890A CN102828804A (en) | 2012-10-09 | 2012-10-09 | Urea ejector capable of forming vortex |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102828804A true CN102828804A (en) | 2012-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103791890A Pending CN102828804A (en) | 2012-10-09 | 2012-10-09 | Urea ejector capable of forming vortex |
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| CN (1) | CN102828804A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332768A (en) * | 2014-08-13 | 2016-02-17 | 浙江福爱电子有限公司 | Swirl nozzle for treatment after exhaust of engine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000045911A (en) * | 1998-07-28 | 2000-02-15 | Zexel Corp | Swirl type fuel injection valve |
| US6244525B1 (en) * | 1998-01-20 | 2001-06-12 | Sagem S.A. | Fuel injector for an internal combustion engine |
| CN1637274A (en) * | 2003-12-25 | 2005-07-13 | 三菱电机株式会社 | Fuel injection valve and method for manufacturing swirler |
| CN102322321A (en) * | 2011-09-01 | 2012-01-18 | 中国重汽集团重庆燃油喷射系统有限公司 | Clearance adjusting and locking structure of ejector |
| WO2012086003A1 (en) * | 2010-12-20 | 2012-06-28 | トヨタ自動車株式会社 | Fuel injection valve |
| CN202789026U (en) * | 2012-10-09 | 2013-03-13 | 中国重汽集团重庆燃油喷射系统有限公司 | Urea ejector capable of forming eddies |
-
2012
- 2012-10-09 CN CN2012103791890A patent/CN102828804A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6244525B1 (en) * | 1998-01-20 | 2001-06-12 | Sagem S.A. | Fuel injector for an internal combustion engine |
| JP2000045911A (en) * | 1998-07-28 | 2000-02-15 | Zexel Corp | Swirl type fuel injection valve |
| CN1637274A (en) * | 2003-12-25 | 2005-07-13 | 三菱电机株式会社 | Fuel injection valve and method for manufacturing swirler |
| WO2012086003A1 (en) * | 2010-12-20 | 2012-06-28 | トヨタ自動車株式会社 | Fuel injection valve |
| CN102322321A (en) * | 2011-09-01 | 2012-01-18 | 中国重汽集团重庆燃油喷射系统有限公司 | Clearance adjusting and locking structure of ejector |
| CN202789026U (en) * | 2012-10-09 | 2013-03-13 | 中国重汽集团重庆燃油喷射系统有限公司 | Urea ejector capable of forming eddies |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332768A (en) * | 2014-08-13 | 2016-02-17 | 浙江福爱电子有限公司 | Swirl nozzle for treatment after exhaust of engine |
| CN105332768B (en) * | 2014-08-13 | 2018-07-20 | 浙江福爱电子有限公司 | A kind of engine exhaust post-processing swirl nozzle |
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Application publication date: 20121219 |