CN202081942U - Liquid heating type metering injection pump for SCR system - Google Patents
Liquid heating type metering injection pump for SCR system Download PDFInfo
- Publication number
- CN202081942U CN202081942U CN2011201945293U CN201120194529U CN202081942U CN 202081942 U CN202081942 U CN 202081942U CN 2011201945293 U CN2011201945293 U CN 2011201945293U CN 201120194529 U CN201120194529 U CN 201120194529U CN 202081942 U CN202081942 U CN 202081942U
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- pump
- metered injection
- liquid
- pump housing
- heating type
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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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Abstract
The utility model discloses a liquid heating type metering injection pump for an SCR (Selective Catalyst Reaction) system. The liquid heating type metering injection pump is used for injecting a reducing agent in the SCR system into an exhaust pipe and comprises a metering injection unit and a water heating unit used for heating the metering injection unit, wherein the metering injection unit comprises a pump body, and a diaphragm pump, a metering valve, a base plate and a liquid flow channel which are arranged on the pump body; the liquid flow channel comprises a liquid flow pipeline, a backflow pipeline, a liquid absorbing connector, a liquid discharging connector and a liquid return connector which are arranged on the pump body; and the water heating unit comprises a water cycling pipeline, a water inlet connector and a water outlet connector which are arranged on the pump body. By leading engine cooling water after being heated into a metering pump and enabling the engine cooling water to flow circularly, the liquid heating type metering injection pump for the SCR system provided by the utility model can heat the pump body and the reducing agent in the pump body in cold seasons, thereby improving use ratio of energy. Moreover, structure is compact and integration degree is high.
Description
Technical field
The utility model relates to the ejection control device of reducing agent in a kind of exhaust gas from diesel vehicle treatment and purification system, relates in particular to the liquid heating type metered injection pump in a kind of SCR (Selective Catalyst Reaction, selectivity catalyzed conversion route) system.
Background technique
Along with society's more and more higher to environmental protection requirement; country is increasing to the dynamics of environmental protection; relevant policies have been put into effect with regard to vehicular emission aspect national correlation department; especially the implementation of " state's IV standard "; control more becomes strict to vehicular emission; need satisfy further reduce by 30%～50% pollutant on " state's III standard " basis again could be up to standard, by the normal implementation process of standard, the whole country will be implemented " state's IV standard " in 2012.
Existing known, selective catalytic reduction technology (SCR) is the main flow route of motor-vehicle tail-gas post-processing technology, be about to reducing agent (being called " adding indigo plant " in the industry) through atomizing quantitative injection intake and exhaust pipeline, and by the SCR catalyzer the main harmful gas NOX in the waste gas is changed into the nitrogen G﹠W and discharge, reach the purpose of tail gas clean-up, this also is to realize " state's IV standard " the most general technology path.
The most general reducing agent is 32.5% aqueous solution of urea in the SCR system, this solution can freeze in the time of-11 ℃, especially in winter of cold, some local temperature can be low to moderate below-30 ℃, this makes the SCR system be restricted in the use in the lower area of temperature, therefore will solve ice formation issues by the heating to urea storage device and pipeline; In the prior art, to the heating of metered injection pump, mainly adopt electric heating, promptly the mode that heats up by the energising to power resistor heats, and this mode of heating has increased the lead connection, the demolition and maintenance difficulty, and power consumption is high, and also influential to the life of storage battery.
The model utility content
The purpose of this utility model is to overcome the defective of prior art, proposes a kind of compact structure, is convenient to safeguard, and has liquid heating type metered injection pump in the SCR system of heating function.
For achieving the above object, the utility model proposes following technological scheme: the liquid heating type metered injection pump in the SCR system, be used for the reducing agent of SCR system is sprayed, described liquid heating type metered injection pump comprises metered injection unit and the water heating unit that described metered injection unit is heated, described metered injection unit comprises the pump housing, is arranged on diaphragm pump and metering valve on the pump housing, and returning the liquid joint for what reducing agent refluxed, described water heating unit comprises and is formed in the pump housing and the lip-deep plural number section of pump housing water circulating pipe.
Preferably, described metered injection device also comprises the lid that is interlocked with the pump housing, forms an enclosed space between the described lid and the pump housing, and described at least diaphragm pump and metering valve place in the described enclosed space.
Described metered injection unit also comprises the substrate that matches with the described pump housing, and the described pump housing is arranged on the described substrate.
Described time the liquid joint is arranged on the described substrate.
Described water heating unit comprises the plural number section water circulating pipe that is formed in the pump housing and on the pump housing, and is arranged at water supply connector and water output connector on the pump housing, and described water supply connector and water output connector and described water circulating pipe are connected.
Also be provided with plural number section liquid flow tube road on the described pump housing, and and described liquid flow tube road the imbibition joint and the fluid joint that join, described imbibition joint, diaphragm pump, metering valve and fluid joint are in series by described liquid flow tube road.
Described metered injection pump also comprises the return line that is used for the reducing agent backflow, and described return line comprises the first flow district and second flow path area that is arranged between the described pump housing and substrate, and the 3rd flow path area that extends to base lower surface.
Described metered injection unit also comprises filter, and described filter is connected on the pump housing of described metering valve upstream.
Described metered injection unit also comprises the control unit that the control reducing agent sprays.
Described metered injection unit also comprises the temperature transducer that the described pump housing is carried out monitoring temperature.
Compared with prior art, the liquid heating type metered injection pump in the utility model SCR system adopts and will introduce metering pump through the engine cooling water of heating, has improved energy utilization ratio, has saved the heating equipment that metering pump is heated separately; Simultaneously, the utility model metered injection pump structure compactness, integrated degree height also is convenient to regular maintenance.
Description of drawings
Fig. 1 is the three-dimensional view of the liquid heating type metered injection pump in the utility model SCR system;
Fig. 2 is the isometric exploded view of Fig. 1;
Fig. 3 be in the utility model SCR system liquid heating type metered injection pump wiring diagram;
Fig. 4 is the plan view of the pump housing in the utility model;
Fig. 5 is the worm's eye view of the pump housing in the utility model;
Fig. 6 is the worm's eye view of the substrate in the utility model.
The label of element among the figure
Embodiment
Below in conjunction with accompanying drawing of the present utility model, the technological scheme in the utility model preferred embodiment is carried out clear, complete description.
As Fig. 1-shown in Figure 6, liquid heating type metered injection pump in the utility model SCR system, be used for the injection of reducing agent of SCR system is injected in the outlet pipe, it comprises metered injection unit 1 and the water heating unit 8 that described metered injection unit is heated, described metered injection unit comprises lid 2, the pump housing 3, substrate 4, diaphragm pump 31, filter 32, metering valve 33, mixing chamber 34, first pressure transducer 35, second pressure transducer 36, control unit 37, and is formed at the confession reducing agent liquid flow flowing passage 5 on the pump housing.
In conjunction with Fig. 1, Fig. 2 and shown in Figure 3, described lid 2 is fastened on the pump housing 3, itself and 3 of the pump housings form an enclosed space, described diaphragm pump 31, metering valve 33, mixing chamber 34, first pressure transducer 35 and second pressure transducer 36 all are arranged in described lid 2 and the pump housing 3 formed enclosed spaces, described filter 32 places on the pump housing 3 in described lid 2 outsides, is convenient to cleaning; Described diaphragm pump 31 is used for reducing agent is drawn into liquid chunnel 5 in the pump housing 3, thereby provides power source for the conveying of reducing agent.The described pump housing 3 is arranged on the described substrate 4, and described liquid chunnel 5 runs through and is arranged in the described pump housing 3 and on the surface of the pump housing 3 and substrate 4.
Described filter 32 is fixedly installed on the pump housing 3, is used for filtering and surge suppressing, and what described metering valve 33 adopted in the present embodiment is the special-purpose metering valve of highi degree of accuracy urea, is used for reducing agent is carried out metered injection.One end of metering valve 33 is connected with filter 32 by the liquid chunnel in the pump housing 5, and the other end is connected with mixing chamber 34, and this mixing chamber 34 is connected on the downstream of metering valve 33, mainly plays the mixed aerosol function of gas-liquid, to form uniform suspension, optimize purifying effect.
In conjunction with Fig. 3, Fig. 5 and shown in Figure 6, described liquid chunnel 5 comprises plural number section liquid flow tube road 51 and return line 52, and imbibition joint 53, fluid joint 54 and time liquid joint 55.In the present embodiment, described liquid flow tube road 51 is run through in the sealed cavity that is arranged at 4 of the pump housing 3 inboards and pump housing lower surface and substrates, described return line 52 is used for the backflow of reducing agent, it comprises the first flow district 521 and second flow path area 522 that is arranged at 4 of the pump housing 3 and substrates, and the 3rd flow path area 523 that extends to base lower surface, described imbibition joint 53 and time liquid joint 55 are arranged on the sidewall of described substrate 4, described fluid joint 54 also is arranged on the sidewall of the described pump housing 3, described imbibition joint 53, diaphragm pump 31, metering valve 33, mixing chamber 34 and fluid joint 54 are in series by described liquid flow tube road 51, and described liquid return pipe road 52 joins through diaphragm valve 38 and described time liquid joint 55.
During work, reducing agent is in diaphragm pump 31 is sucked into the pump housing 3, be transported in the part of the liquid flow tube road 51 of pump housing lower surface and base plate seals and return line 52 through one-way valve 39 then, in return line 52, under the state that diaphragm valve 38 is opened, because the return line pressurized is less, reducing agent can flow into second flow path area 512 by first flow district 511 by diaphragm valve 38, and then after reaching back liquid joint 55 through the 3rd flow path area 523 on substrate 4 lower surfaces, reducing agent is backflowed in the liquid tank 7, finishes the backflow emptying.
When described diaphragm valve 38 cuts out, reducing agent can flow in the circular groove 62 that described filter 32 is installed by the penetration hole 61 that connects the liquid flow tube road 51 and the pump housing, liquid entering hole with described filter 32 joins again, and described liquid flow tube road 51 is pipeline connection metering valve 33 and fluid joint 54 successively again.
In conjunction with Fig. 2, Fig. 3, Fig. 5 shows, liquid heating type metered injection pump in the utility model SCR system also comprises water heating unit 8, circulate in the water circulating pipe of engine cooling water on the pump housing that described water heating unit 8 adopts after heating, in season of cold or lower temperature environment, can the reducing agent in the pump housing and the pump housing be heated, it comprises water supply connector 81, water output connector 82 and plural number section water circulating pipe 83, described water circulating pipe 83 comprises the first flow 831 and second runner 832 that is arranged in the pump housing 3, and the 3rd runner 833 that is formed at 4 of the pump housing 3 lower surfaces and substrates, the first flow 831 and second runner 832 join with the water supply connector 81 and the water output connector 82 that are arranged on the pump housing sidewall respectively.So that the reducing agent in the pump housing 3 and the pump housing is formed good heating.
Described control unit 37 is electrically connected described diaphragm pump 31, metering valve 33, and first pressure transducer 35 and second pressure transducer 36 that are installed in metering valve 33 two ends, wherein first pressure transducer 35 is arranged on the upstream extremity of described metering valve 33, second pressure transducer 36 is arranged on the downstream of described metering valve 33, the command injection amount that first pressure transducer 35 and second pressure transducer 36 receive according to control unit and the pressure reduction at metering valve two ends, and calculate the dutycycle of the unbalanced pulse of metering valve 33, reach the purpose of accurate measurement.
More preferably, as shown in Figure 3, in the described pump housing 3, also be equiped with the temperature transducer 9 of measuring reducing agent temperature in the pump housing.
When control unit receives the engine ignition signal, motor in the control unit 37 control diaphragm pumps 31 begins the emptying action with a certain fixed rotating speed, make the reducing agent in the liquid chunnel 5 turn back in liquid tank 7 (see figure 3)s by return line, after about 30 seconds, control unit 37 control electromagnetic valve are opened source of the gas and are closed dump circuit, this moment, diaphragm pump 31 worked on, reducing agent is delivered to the upstream of metering valve 33 by the pump housing 3 behind liquid flow tube road 51 and filter 32, its pressure continues to increase, when the pressure value P 1 of first pressure transducer 35 of metering valve 33 upstreams reaches setting value, diaphragm pump 31 motor stalls, control unit 37 receives the request of injection, and control metering valve 33 beginning metered injections, and second pressure transducer 36 is used to gather the pressure value P 2 in metering valve downstream, with calculating pressure reduction, and adjust metering valve and open pulsewidth.
After the liquid film sheet is closed back in control unit 37 control pressurized air unit, before the injection, (P1) is less for the force value of first pressure transducer 35, this moment, control unit 37 control diaphragm pumps 31 interior motors moved with predefined rotating speed, approximately behind the 5s, the pressure P 1 in the filtering cavity reaches the jet pressure value; Beginning to spray back P1 can descend, and rate of descent is relevant with emitted dose, stable in order to keep P1, motor is started working, and filtering cavity replenishes reducing agent, to keep the stable of P1 value, in this process, motor speed carries out closed loop control according to emitted dose and current P1 value, reaches the purpose of accurate measurement.
When temperature is hanged down the needs heating, when control unit 37 receives the low-temperature signal of temperature transducer, control unit can be controlled the heating unit 8 of fetching boiling water, engine cooling water after the heating flow through successively water supply connector 81, water circulating pipe 83 and water output connector 82 have been realized the heating of metered injection unit.
Technology contents of the present utility model and technical characteristics have disclosed as above; yet those of ordinary skill in the art still may be based on teaching of the present 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 do not deviate from replacement of the present utility model and modifications, and contained by the present patent application claim.
Claims (10)
1.SCR the liquid heating type metered injection pump in the system, be used for the reducing agent of SCR system is sprayed, it is characterized in that: described liquid heating type metered injection pump comprises metered injection unit and the water heating unit that described metered injection unit is heated, described metered injection unit comprises the pump housing, is arranged on diaphragm pump and metering valve on the pump housing, and time liquid joint that supplies reducing agent to reflux; Described water heating unit comprises and is formed in the pump housing and the lip-deep plural number section of pump housing water circulating pipe.
2. the liquid heating type metered injection pump in the SCR according to claim 1 system, it is characterized in that: described metered injection device also comprises the lid that is interlocked with the pump housing, form an enclosed space between the described lid and the pump housing, described at least diaphragm pump and metering valve place in the described enclosed space.
3. the liquid heating type metered injection pump in the SCR according to claim 1 system, it is characterized in that: described metered injection unit also comprises the substrate that matches with the described pump housing, and the described pump housing is arranged on the described substrate.
4. the liquid heating type metered injection pump in the SCR according to claim 3 system, it is characterized in that: described time the liquid joint is arranged on the described substrate.
5. according to the liquid heating type metered injection pump in any described SCR system of claim 1 to 4, it is characterized in that: described water heating unit also comprises water supply connector and the water output connector that is arranged on the pump housing, and described water supply connector and water output connector and described water circulating pipe are connected.
6. according to the liquid heating type metered injection pump in any described SCR system of claim 1 to 4, it is characterized in that: also be provided with plural number section liquid flow tube road on the described pump housing, and and described liquid flow tube road the imbibition joint and the fluid joint that join, described imbibition joint, diaphragm pump, metering valve and fluid joint are in series by described liquid flow tube road.
7. according to the liquid heating type metered injection pump in any described SCR system of claim 1 to 4, it is characterized in that: described metered injection pump also comprise be used for that reducing agent refluxes return line, described return line comprises the first flow district and second flow path area that is arranged between the described pump housing and substrate, and the 3rd flow path area that extends to base lower surface.
8. according to the liquid heating type metered injection pump in any described SCR system of claim 1 to 4, it is characterized in that: described metered injection unit also comprises filter, and described filter is connected on the pump housing of described metering valve upstream.
9. according to the liquid heating type metered injection pump in any described SCR system of claim 1 to 4, it is characterized in that: described metered injection unit also comprises the control unit that the control reducing agent sprays.
10. according to the liquid heating type metered injection pump in any described SCR system of claim 1 to 4, it is characterized in that: described metered injection unit also comprises the temperature transducer that the described pump housing is carried out monitoring temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201945293U CN202081942U (en) | 2011-06-10 | 2011-06-10 | Liquid heating type metering injection pump for SCR system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201945293U CN202081942U (en) | 2011-06-10 | 2011-06-10 | Liquid heating type metering injection pump for SCR system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202081942U true CN202081942U (en) | 2011-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201945293U Expired - Lifetime CN202081942U (en) | 2011-06-10 | 2011-06-10 | Liquid heating type metering injection pump for SCR system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202081942U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251832A (en) * | 2011-06-10 | 2011-11-23 | 苏州派格力减排***有限公司 | Liquid heating type metering jet pump in SCR (selective catalytic reduction) system |
| CN103573343A (en) * | 2012-07-18 | 2014-02-12 | 罗伯特·博世有限公司 | A method for operating a conveying and proportioning system |
| CN103573345A (en) * | 2012-07-18 | 2014-02-12 | 罗伯特·博世有限公司 | A method of operating a conveyor and proportioning system |
| CN104169536A (en) * | 2012-03-28 | 2014-11-26 | 排放技术有限公司 | Delivery unit for liquid additive with temperature sensor |
-
2011
- 2011-06-10 CN CN2011201945293U patent/CN202081942U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251832A (en) * | 2011-06-10 | 2011-11-23 | 苏州派格力减排***有限公司 | Liquid heating type metering jet pump in SCR (selective catalytic reduction) system |
| CN104169536A (en) * | 2012-03-28 | 2014-11-26 | 排放技术有限公司 | Delivery unit for liquid additive with temperature sensor |
| CN104169536B (en) * | 2012-03-28 | 2018-10-19 | 排放技术有限公司 | The supply unit with temperature sensor for liquid additive |
| CN103573343A (en) * | 2012-07-18 | 2014-02-12 | 罗伯特·博世有限公司 | A method for operating a conveying and proportioning system |
| CN103573345A (en) * | 2012-07-18 | 2014-02-12 | 罗伯特·博世有限公司 | A method of operating a conveyor and proportioning system |
| CN103573343B (en) * | 2012-07-18 | 2018-07-17 | 罗伯特·博世有限公司 | Method for running conveying and dosing system |
| CN103573345B (en) * | 2012-07-18 | 2018-07-17 | 罗伯特·博世有限公司 | Method for running conveying and dosing system |
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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 Yue Road, Fen Hu Town, Wujiang, Jiangsu Patentee after: Suzhou PowerGreen Emission Solution System Co., Ltd. Address before: 215211 Wujiang City, Jiangsu province FENHU Economic Development Zone, the community Fen Road No. 666 Patentee before: Suzhou PowerGreen Emission Solution System Co., Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20111221 Effective date of abandoning: 20130605 |
|
| RGAV | Abandon patent right to avoid regrant |