CN202148941U - Anti-blocking device of air throttling orifices in selective catalytic reduction (SCR) ejecting system - Google Patents
Anti-blocking device of air throttling orifices in selective catalytic reduction (SCR) ejecting system Download PDFInfo
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- CN202148941U CN202148941U CN201120242990U CN201120242990U CN202148941U CN 202148941 U CN202148941 U CN 202148941U CN 201120242990 U CN201120242990 U CN 201120242990U CN 201120242990 U CN201120242990 U CN 201120242990U CN 202148941 U CN202148941 U CN 202148941U
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Abstract
The utility model discloses an anti-blocking device of air throttling orifices in a silicon controlled rectifier (SCR) ejecting system. The air throttling orifices are arranged on a lateral wall of a mixing cavity of a pump body of a metering pump. The anti-blocking device comprises an air cylinder cavity chamber formed on the pump body and a movable assembly arranged in the air cylinder cavity chamber, the movable assembly divides the air cylinder cavity chamber into a first cavity chamber and a second cavity chamber, a spring and a spiracle are connected with the movable assembly and arranged in the first cavity chamber, a compressed air inlet is arranged in the second cavity chamber, the tail end of the second cavity chamber of a cylinder body assembly is provided with a through needle, and the second cavity chamber is communicated with the mixing cavity through the air throttling orifices. The anti-blocking device can effectively preventing the air throttling orifices from diminishing or being blocked caused by crystallization of reducing agents accumulated in the air throttling orifices, thereby ensuring atomization effect of the reducing agents.
Description
Technical field
The utility model relates to the SCR system in a kind of exhaust gas from diesel vehicle reprocessing, relates in particular to the anti-block device of the air throttle orifice on the mixing chamber sidewall in a kind of SCR system metering pump.
Background technique
Along with improving constantly of vehicular emission standard, the vehicle tai-gas clean-up system is the day by day extremely concern of vehicle manufacturers also, and various technology paths are also ripe gradually.Existing known; Nitrogen oxide through in SCR technology (SCR) the minimizing internal-combustion engine especially diesel engine vent gas is a kind of general technology path; Be about to reducing agent (32.5% aqueous solution of urea) through atomizing quantitative injection intake and exhaust pipeline, and pass through the SCR catalyzer the main harmful gas NO in the waste gas
XChange into the nitrogen G&W and discharge, reach the purpose of tail gas clean-up.
The metering jet pump is accurate controlling component in the SCR system, and the atomizing effect that also is the critical component of SCR system, especially reducing agent is one of key factor that influences emission reduction effect; In the existing technology; Metering injection system is divided into no gas system and two kinds of gas systems is arranged, and metering valve is set directly on the outlet pipe in the airless injection system, through direct metered injection of metering valve and atomizing; Though this system is simple in structure; But owing to can only lean on the self-pressure liquid atomizing, atomizing effect is limited, and the ammonia concentration distributing homogeneity is had very big influence.
Another kind is that the gas jet control system is arranged; In earlier stage the application number of submitting to like the claimant is 201120114729.3, name is called the one Chinese patent application of " the urea metering jet pump in the SCR system "; A kind of gas control system system that has is wherein disclosed; As shown in Figure 1, this has gas control system system mainly to rely on diaphragm pump 91 that reducing agent is delivered to metering valve 92 inlets, accurately measures through metering valve 92 injection of reducing agent is mapped in the mixing chamber 93; Compressed-air actuated high velocity air gets in the mixing chamber 93 through the air throttle orifice on mixing chamber 93 sidewalls 94; The reducing agent that ejects is carried out primary atomization and is blown into nozzle 95 places, carry out atomized spray in the nozzle ejection process once more in gas exhaust piping, in the SCR carrier, carry out selective reaction after the pyrolysis in outlet pipe of the reducing agent of secondary-atomizing, the hydrolysis.This have the gas jet system that himself advantage is arranged, and promptly in mixing chamber, carries out gas-liquid mixed, and carry out secondary-atomizing through the nozzle that is installed in the outlet pipe, and atomizing effect is good.
Yet because the air throttle orifice is less, its diameter generally has only general 0.7mm; Therefore in the course of the work, be prone to stopped up, thereby cause air mass flow to diminish by the urea of crystallization; Influence atomizing effect, can cause the obstruction of air throttle orifice when serious, air-flow can't get into mixing chamber and carry out the gas-liquid stirring; Spray effect is not obvious, thereby influences the catalytic reduction reaction of reducing agent, does not reach desirable emission reduction effect.
The model utility content
The purpose of the utility model is to overcome the defective of existing technology; A kind of anti-block device that designs SCR ejecting system air throttle orifice ingenious, simple in structure is provided; Can effectively prevent to remain in the reducing agent crystallization in the mixing chamber and cause the air throttle orifice to diminish or stops up, with the atomizing effect of assurance reducing agent.
For realizing above-mentioned purpose; The utility model proposes following technological scheme: the anti-block device of SCR ejecting system air throttle orifice; Said air throttle orifice is located on the sidewall of mixing chamber on the metering pump pump housing; It is characterized in that: said anti-block device comprises cylinder chamber that is formed on the said pump housing and the movable component that is arranged at said cylinder chamber; Said movable component is divided into first chamber and second chamber with said cylinder chamber, is provided with the spring that joins with movable component in said first chamber, is provided with the compressed air inlet in said second chamber; The end of said movable component in second chamber is provided with cleansing pin, and said second chamber is connected with said mixing chamber through said air throttle orifice.
Preferably, the said pump housing is the pump housing of integral structure or the pump flow passage structure that is combined by inner panel and outside plate.
Said first chamber is provided with spiracle.
Said anti-block device is the diaphragm type cylinder, and its movable component comprises the working masks of separating said first chamber and second chamber, the piston rod that extends to form to second chamber from working masks, and the said cleansing pin of being located at piston-rod end.
Said anti-block device is a piston type cylinder, and its movable component comprises the piston of separating said first chamber and second chamber, and the piston rod that extends to form to second chamber from piston, and the said cleansing pin of being located at piston-rod end.
First chamber of said piston type cylinder is provided with cylinder end piece.
Said cleansing pin can insert in the said air throttle orifice.
Said air throttle orifice tangential is arranged on the sidewall of mixing chamber.
Compared with prior art; The anti-block device of the air throttle orifice in the utility model SCR system has the anti-blocking structure that has increased the air throttle orifice in the gas jet control system in existing SCR; Its reasonable in design, can effectively prevent to remain in the reducing agent crystallization in the mixing chamber and cause the air throttle orifice to diminish or stops up, thereby the atomizing effect that guarantees reducing agent reaches the emission reduction effect to vehicle exhaust.
Description of drawings
Fig. 1 is the schematic diagram that SCR has gas metered injection pumping system in the background technique;
Fig. 2 is the partial schematic diagram of the SCR system middle pump body that comprises anti-block device that disclosed of the utility model first embodiment;
Fig. 3 be under the aeration status among Fig. 2 A-A to sectional view;
Fig. 4 be under the no gaseity among Fig. 2 A-A to sectional view;
Fig. 5 is the structural representation of diaphragm unit among first embodiment;
Fig. 6 is the partial sectional view of anti-block device under aeration status that the utility model second embodiment is disclosed;
Fig. 7 is the partial sectional view of anti-block device under no gaseity that the utility model second embodiment is disclosed.
Embodiment
To combine the accompanying drawing of the utility model below, the technological scheme in the utility model preferred embodiment will be carried out clear, complete description.
The air throttle orifice anti-block device of mixing chamber in the utility model SCR system is applicable to that SCR as shown in Figure 1 has in the gas jet system.Stop up for preventing that the air throttle orifice on the mixing chamber sidewall is reduced agent in the ejecting system; The utility model is employed in the chamber that an installing cylinder movable component is set on the pump housing of metering pump, is provided with one on the movable component and can inserts cleansing pin in the air throttle orifice to prevent the obstruction of air throttle orifice.
Structural representation like the anti-block device of Fig. 2 ~ SCR ejecting system air throttle orifice that is disclosed for the utility model first embodiment shown in Figure 5; It is applicable to that pump body structure is in the metered injection pump of integral type; Like Fig. 3, shown in Figure 4; Air throttle orifice 94 is arranged on the sidewall of the mixing chamber 93 on the pump housing 1, and the pump housing 1 is provided with cylinder chamber 2 and the movable component that places in the cylinder chamber 2, and movable component is divided into first chamber 21 and second chamber 22 with said cylinder chamber 2; Be provided with the spring 4 and spiracle 5 that join with movable component in said first chamber 21; Be provided with compressed air inlet 6, the second chambers 22 in said second chamber 22 and be connected with said mixing chamber 93 through said air throttle orifice 94, said air throttle orifice 94 is tangent to being provided with to form interior rotational gas flow with the sidewall of mixing chamber 93.
In first embodiment; Said anti-block device is the diaphragm type cylinder; Its movable component is diaphragm unit 3a, and this diaphragm unit 3a comprises the working masks 31a that separates said first chamber 21 and second chamber 22, the piston rod 32a that extends to form to second chamber 22 from working masks 31a; And being formed at the terminal cleansing pin 33a of piston rod 32a, said cleansing pin 33a can insert in the air throttle orifice 94 under the effect of piston rod 32a reciprocating typely.Said spring 4 is installed in first chamber 21, and the one of which end is resisted against on the inwall of first chamber 21, and the other end supports and is located on the working masks 31a.
Preferably, as shown in Figure 5, said diaphragm unit 31a is a rubber material, and working masks 31a on the diaphragm unit and piston rod 32a are integral type, and piston rod is the spline piston rod.
When metered injection pump proper functioning; As shown in Figure 3; The compressed air inlet 6 of pressurized air from the pump housing 1 gets in second chamber 22 of cylinders, and along with pressurized air continues to be blown into, and will push the work forward diaphragm 31a and piston rod 32a of the pressure that pressurized air produces moves and pressure spring 4 to the direction of first chamber 21; Piston rod 32a further drives cleansing pin 33a and from the air throttle orifice, extracts; At this moment, pressurized air then gets in the mixing chamber, fully to mix with reducing agent and the reducing agent that ejects is atomized from the air throttle orifice.
And after closing source of the gas, as shown in Figure 4, there is not pressurized air in second chamber 22 of diaphragm type cylinder; Under the effect of spring; The diaphragm 31a that pushes the work forward moves to reset to second chamber 22, and piston rod 32a and cleansing pin 33a also reset simultaneously, at this moment; Cleansing pin 33a inserts in the air throttle orifice 94, thereby has prevented that residual reducing agent from stopping up air throttle orifice 94.
The anti-block device of the air throttle orifice that the utility model second embodiment is disclosed; This anti-block device is the piston type cylinder that is arranged on the pump housing; This anti-block device both had been applicable to that the pump housing is the metered injection pump of integral type, also was applicable to split type metered injection pump, like Fig. 6, shown in Figure 7; The pump housing is by inner panel 11 and outside plate 12 pump flow passage structures dimerous; Mixing chamber 93 is formed with the two-part on the outside plate 12 by being arranged at inner panel 11, and an end of the mixing chamber on the inner panel 11 is provided with metering valve 92, and an end of the mixing chamber on the outside plate 12 is provided with fluid joint 96; Air throttle orifice 94 is arranged on the inwall of the mixing chamber 93 on the inner panel 11, and tangent to being provided with to form interior rotational gas flow with the mixing chamber sidewall.
The piston assembly 3b of said piston type cylinder comprises the piston 32b that separates first chamber 21 and second chamber 22; The piston rod 33b that extends to form to second chamber 22 from piston 32b; And the cleansing pin 34b that is formed at piston rod 33b end; One end of first chamber is provided with cylinder end piece 31b, and spiracle 5 is located at cylinder end piece 31b and is gone up to prevent spring 4 compression difficult, and spring 4 one ends are resisted against on the cylinder end piece 31b; The other end is located on the piston 32b, and said cleansing pin 34b can be inserted in the air throttle orifice 94 under the drive of piston rod 33b reciprocating typely.
When metered injection pump proper functioning; As shown in Figure 6; Pressurized air gets in second chamber 22 of cylinder from the compressed air inlet 6 on the pump housing 1 inner panel 11; And along with pressurized air continues to be blown into, the pressure that pressurized air produces will promote piston 32b and piston rod 33b pressure spring 4, make piston rod 33b drive cleansing pin 34b and from air throttle orifice 94, extract; Pressurized air then gets in the mixing chamber 93, fully to mix with reducing agent and the reducing agent that ejects is atomized from air throttle orifice 94.
And after closing source of the gas; As shown in Figure 7; Do not have pressurized air in second chamber 22 of cylinder, under the effect of spring 4, promote piston 32b and piston rod 33b and reset; Piston rod 33b drive cleansing pin 34b resets and inserts in the air throttle orifice 94, thereby has prevented that residual reducing agent from stopping up air throttle orifice 94.
Technology contents of the utility model and technical characteristics have disclosed as above; Yet those of ordinary skill in the art still maybe be based on the teaching of the utility model and announcements and are done all replacement and modifications that does not deviate from the utility model spirit; Therefore; The utility model protection domain should be not limited to the content that embodiment discloses, and should comprise various replacement and the modifications that do not deviate from the utility model, and is contained by the present patent application claim.
Claims (8)
1.SCR the anti-block device of ejecting system air throttle orifice; Said air throttle orifice is located on the sidewall of mixing chamber on the metering pump pump housing; It is characterized in that: said anti-block device comprises cylinder chamber that is formed on the said pump housing and the movable component that is arranged at said cylinder chamber; Said movable component is divided into first chamber and second chamber with said cylinder chamber, is provided with the spring that joins with movable component in said first chamber, is provided with the compressed air inlet in said second chamber; The end of said movable component in second chamber is provided with cleansing pin, and said second chamber is connected with said mixing chamber through said air throttle orifice.
2. the anti-block device of SCR ejecting system air throttle orifice according to claim 1 is characterized in that: the said pump housing is the pump housing of integral structure or the pump flow passage structure that is combined by inner panel and outside plate.
3. the anti-block device of SCR ejecting system air throttle orifice according to claim 1 is characterized in that: said first chamber is provided with spiracle.
4. according to the anti-block device of any described SCR ejecting system air throttle orifice of claim 1 to 3; It is characterized in that: said anti-block device is the diaphragm type cylinder; Its movable component comprises the working masks of separating said first chamber and second chamber; The piston rod that extends to form to second chamber from working masks, and the said cleansing pin of being located at piston-rod end.
5. according to the anti-block device of any described SCR ejecting system air throttle orifice of claim 1 to 3; It is characterized in that: said anti-block device is a piston type cylinder; Its movable component comprises the piston of separating said first chamber and second chamber; And the piston rod that extends to form to second chamber from piston, and the said cleansing pin of being located at piston-rod end.
6. the anti-block device of SCR ejecting system air throttle orifice according to claim 5 is characterized in that: also be provided with cylinder end piece on said first chamber.
7. the anti-block device of SCR ejecting system air throttle orifice according to claim 1 is characterized in that: said cleansing pin can insert in the said air throttle orifice.
8. the anti-block device of SCR ejecting system air throttle orifice according to claim 1 is characterized in that: said air throttle orifice tangential is arranged on the sidewall of mixing chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120242990U CN202148941U (en) | 2011-07-11 | 2011-07-11 | Anti-blocking device of air throttling orifices in selective catalytic reduction (SCR) ejecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120242990U CN202148941U (en) | 2011-07-11 | 2011-07-11 | Anti-blocking device of air throttling orifices in selective catalytic reduction (SCR) ejecting system |
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| Publication Number | Publication Date |
|---|---|
| CN202148941U true CN202148941U (en) | 2012-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120242990U Expired - Fee Related CN202148941U (en) | 2011-07-11 | 2011-07-11 | Anti-blocking device of air throttling orifices in selective catalytic reduction (SCR) ejecting system |
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| CN (1) | CN202148941U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889109A (en) * | 2011-07-11 | 2013-01-23 | 苏州派格丽减排系统有限公司 | Anti-blocking device for air orifice in SCR (Selective Catalytic Reduction) injection system |
| CN103157375A (en) * | 2012-02-23 | 2013-06-19 | 苏州派格丽减排系统有限公司 | Selective catalytic reduction (SCR) metering injection pump urea crystal dissolving device |
| CN107136561A (en) * | 2017-06-17 | 2017-09-08 | 常德烟草机械有限责任公司 | The glue cooling device and cooling means of a kind of cork paper |
-
2011
- 2011-07-11 CN CN201120242990U patent/CN202148941U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889109A (en) * | 2011-07-11 | 2013-01-23 | 苏州派格丽减排系统有限公司 | Anti-blocking device for air orifice in SCR (Selective Catalytic Reduction) injection system |
| CN102889109B (en) * | 2011-07-11 | 2015-11-18 | 苏州派格丽减排系统有限公司 | The anti-block device of SCR ejecting system hollow moral discharge orifice |
| CN103157375A (en) * | 2012-02-23 | 2013-06-19 | 苏州派格丽减排系统有限公司 | Selective catalytic reduction (SCR) metering injection pump urea crystal dissolving device |
| CN103157375B (en) * | 2012-02-23 | 2015-04-01 | 苏州派格丽减排系统有限公司 | Selective catalytic reduction (SCR) metering injection pump urea crystal dissolving device |
| CN107136561A (en) * | 2017-06-17 | 2017-09-08 | 常德烟草机械有限责任公司 | The glue cooling device and cooling means of a kind of cork paper |
| CN107136561B (en) * | 2017-06-17 | 2018-03-06 | 常德烟草机械有限责任公司 | The glue cooling device and cooling means of a kind of cork paper |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 215211, No. 666 Fen Lu, Fen Hu Town, Wujiang City, Jiangsu, Suzhou Patentee after: Suzhou PowerGreen Emission Solution System Co., Ltd. Address before: 215211 Jiangsu city of Suzhou province Wujiang FENHU Economic Development Zone, the community Fen Road No. 666 Patentee before: Suzhou PowerGreen Emission Solution System Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120222 Termination date: 20160711 |