CN203532028U - Pneumatic duplex measurement injecting system - Google Patents
Pneumatic duplex measurement injecting system Download PDFInfo
- Publication number
- CN203532028U CN203532028U CN201320699134.8U CN201320699134U CN203532028U CN 203532028 U CN203532028 U CN 203532028U CN 201320699134 U CN201320699134 U CN 201320699134U CN 203532028 U CN203532028 U CN 203532028U
- Authority
- CN
- China
- Prior art keywords
- cavity
- gas
- urea
- pneumatic duplex
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000005259 measurement Methods 0.000 title abstract 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 77
- 239000007788 liquid Substances 0.000 claims abstract description 53
- 239000004202 carbamide Substances 0.000 claims abstract description 43
- 229960000539 carbamide Drugs 0.000 claims description 35
- 235000013877 carbamide Nutrition 0.000 claims description 35
- 238000002347 injection Methods 0.000 claims description 19
- 239000007924 injection Substances 0.000 claims description 19
- 238000007710 freezing Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 13
- 239000007921 spray Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000003638 reducing agent Substances 0.000 description 3
- 238000005213 imbibition Methods 0.000 description 2
- 108060003095 GAS2 Proteins 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- -1 build pressure Substances 0.000 description 1
- 230000003247 decreasing Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- Y02T10/40—Engine management systems
Abstract
The utility model provides a pneumatic duplex measurement injecting system. The pneumatic duplex measurement injecting system comprises a urea tank, a gas source for providing injecting pressure, a pneumatic duplex pump, an air electromagnetic valve, a gas path reversing valve, liquid path reversing valves, a pressure sensor, a control circuit, a gas pipe, urea pipes and an electric control circuit, wherein the gas pipe, the urea pipes and the electric control circuit play a role of connection. The pneumatic duplex pump comprises a liquid cavity, a gas cavity inside the liquid cavity and a sliding connecting rod arranged inside the gas cavity; the gas source is connected with the gas cavity through the gas pipe and the pneumatic duplex pump, and the gas pipe is connected with an air electromagnetic valve and the gas path reversing valve; the urea tank and a urea injecting valve are connected with the liquid cavity on both sides of the pneumatic duplex pump through the urea pipes, and the urea pipes are provided with the liquid path reversing valves. The pneumatic duplex measurement injecting system is simple in structure and small in the number of parts, requires no change of an existing urea tank and accordingly is low in cost; takes compressed air as the main power source and meanwhile is low in air consumption, low in operation cost, energy-saving and environmentally friendly; has power-off evacuation capabilities to avoid freezing of the pipes and achieves high security and stability.
Description
Technical field
The utility model relates to a kind of vehicle exhaust SCR processor, the pneumatic duplex metering injection system of especially a kind of SCR.
Background technique
Existing main flow SCR ejecting system is used electric power as main power source, and this mode consumes the electric power of vehicular power-bottle, increases operating cost.The prior art that the model utility that the patent No. of take is CN201020136109.5 is representative discloses a kind of jet control system utilizing air power to atomize urea reductant, its carbamide reducing agent relies on compressed-air actuated motivational drive, mixed aerosol in urea nozzle, rely on the regulation and control of flow solenoid valve, make carbamide reducing agent atomization in the nozzle in single chamber, reach the NO in vehicle exhaust
xpurified treatment.And use pressurized air need to transform urea box as the system of main power source, increased the cost of producing and manufacturing.
Model utility content
Problem to be solved in the utility model is to provide a kind of pneumatic duplex urea-spray system, and this system is used pressurized air as main power source, but does not need urea box to do any change.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of pneumatic duplex metering injection system, comprise urea box, the source of the gas of jet pressure, pneumatic duplex pump, air solenoid valve, gas circuit selector valve, liquid way reversing valve, pressure transducer, control unit are provided, and the gas piping, urea pipe and the automatically controlled circuit that play connection function.
Source of the gas is connected with the air cavity of pneumatic duplex pump by gas piping, connects the gentle way reversing valve of air solenoid valve on gas piping; Urea box is connected with pneumatic duplex pump by urea pipe respectively with carbamide injection valve, and liquid way reversing valve is set on urea pipe.
Urea pipe between liquid way reversing valve and carbamide injection valve is provided with pressure transducer.
Pneumatic duplex pump comprises sap cavity, is arranged on the air cavity in sap cavity and is arranged on the sliding linkage in air cavity.Sap cavity is comprised of left liquid cavity and right liquid cavity, and air cavity is comprised of left air cavity and right air cavity.
Left air cavity and right air cavity are respectively provided with a position limit switch.
Working procedure:
When air solenoid valve is opened, pressurized air enters gas circuit selector valve, and according to the difference of gas circuit selector valve position, pressurized air enters left air cavity or the right air cavity of pneumatic duplex pump;
When pressurized air enters left air cavity, left air cavity increases, and can compress the volume of the left liquid container of duplex pump simultaneously, realizes the pressure of building of left liquid cavity; Meanwhile, under the effect of connecting rod, right air cavity volume reduces, and right liquid cavity volume increases, and pressure reduces, and liquid is sucked to right liquid cavity;
When the volume of left liquid cavity reduces to after the limit, gas circuit selector valve switching position, pressurized air enters right air cavity, and now right liquid cavity starts to build pressure, left liquid cavity imbibition.
Than existing SCR metering injection system, advantage and the good effect that the utlity model has are:
1) system architecture is simple, and number of components is few, and without original urea box is changed, cost is low.
2) use pressurized air as main power source, and air consumption is few, operating cost is low, energy-conserving and environment-protective.
3) under compressed-air actuated driving, chamber, left and right alternate run, duplex pump continuous operation, can guarantee to spray needed pressure.
4) have the emptying ability of shutdown, avoid pipeline to freeze, security and stability is good.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present utility model
Fig. 2 is duplex pump structural representation
Fig. 3 is working-flow figure
Fig. 4 is the liquid schematic flow sheet that adds of the present utility model
Fig. 5 is pressure, the injection schematic flow sheet built of the present utility model
Fig. 6 is emptying schematic flow sheet of the present utility model
In figure:
1, source of the gas 2, air solenoid valve 3, gas circuit selector valve
4, pneumatic duplex pump 5, position limit switch 1, position limit switch two
7, liquid way reversing valve 8, pressure transducer 9, carbamide injection valve
10, urea box 11, control unit
4-1, left liquid cavity 4-2, the right air cavity of left air cavity 4-3
4-4, right liquid cavity 4-5, sliding linkage
Embodiment
Concrete structure of the present utility model is illustrated in fig. 1 shown below, comprise urea box 10, source of the gas 1, pneumatic duplex pump 4, air solenoid valve 2, gas circuit selector valve 3, liquid way reversing valve 7, the control unit 11 of jet pressure are provided, and the gas piping, urea pipe and the automatically controlled circuit that play connection function.
Source of the gas 1 is connected with the air cavity of pneumatic duplex pump 4 by gas piping, connects the gentle way reversing valve 3 of air solenoid valve 2 on gas piping; Urea box 10 is connected with pneumatic duplex pump 4 by urea pipe respectively with carbamide injection valve 9, and liquid way reversing valve 7 is set on urea pipe.
The controlling component of system works is mainly comprised of control unit 11, air solenoid valve 2, gas circuit selector valve 3, pneumatic duplex pump 4, liquid way reversing valve 7.According to 2,3 and 7 cut-off and commutation logic, system realizes adds liquid, builds to press and the function such as spray, emptying.
The state definition of valve is as shown in table 1.
Table 1
When air solenoid valve 2 is opened (being controlled by ECU (Electrical Control Unit) 11), pressurized air enters gas circuit selector valve 3; According to the difference of gas circuit selector valve 3 valve body present positions, pressurized air enters left air cavity 4-2 or the right air cavity 4-3 of pneumatic duplex pump 4.When pressurized air enters left air cavity 4-2, under the effect of air pressure, the volume of left air cavity 4-2 increases, and the volume of left liquid cavity 4-1 is compressed, realizes the pressure of building of left liquid cavity 4-1.Meanwhile, under the effect of connecting rod, right air cavity 4-3 volume reduces, and right liquid cavity 4-4 volume increases, and pressure decreased, sucks right liquid cavity 4-4 by liquid.When the volume of left liquid cavity 4-1 reduces to after the limit (can according to position limit switch 5 and 6 judgements), the valve body switching position of air solenoid valve 2, pressurized air enters right air cavity 4-3, and now right liquid cavity 4-4 builds pressure, left liquid cavity 4-1 imbibition.
The workflow of system as shown in Figure 3, be divided into add liquid, build pressure, injection and emptying, wherein:
Adding liquid is that duplex pump sap cavity is inserted to liquid, and as shown in Figure 4, for pneumatic duplex pump left liquid cavity 4-1 adds liquid flow process, it is identical with it that right liquid cavity 4-4 adds liquid flow process to its process.
Building pressure is by the liquid pressing in sap cavity of duplex pump, and as shown in Figure 5, for pneumatic duplex pump left liquid cavity 4-1 builds pressure, sprays flow process, right liquid cavity 4-4 builds pressure to its process, injection flow process is identical with it.
Spray (by carbamide injection valve 9 cut-off realize) be when keeping jet pressure (break-make by air solenoid valve 2 is carried out pilot pressure), carry out as required the injection of urea liquid, its process is referring to Fig. 5.
Emptying be in the stopping process of system by system in residual urea liquid flow back to urea box, its process as shown in Figure 6, is the emptying flow process of pneumatic duplex pump left liquid cavity 4-1, the emptying flow process of right liquid cavity 4-4 is identical with it.
Above embodiment of the present utility model is had been described in detail, but described content is only preferred embodiment of the present utility model, can not be considered to for limiting practical range of the present utility model.All equalization variations of doing according to the utility model scope and improvement etc., within all should still belonging to this patent covering scope.
Claims (4)
1. a pneumatic duplex metering injection system, it is characterized in that: comprise urea box, the source of the gas of jet pressure, pneumatic duplex pump, air solenoid valve, gas circuit selector valve, liquid way reversing valve, pressure transducer, control unit are provided, and the gas piping, urea pipe and the automatically controlled circuit that play connection function, pneumatic duplex pump comprises sap cavity, is arranged on the air cavity in sap cavity and is arranged on the sliding linkage in air cavity;
Source of the gas is connected with the air cavity of pneumatic duplex pump by gas piping, connects the gentle way reversing valve of air solenoid valve on gas piping; Urea box is connected with the sap cavity of pneumatic duplex pump both sides by urea pipe respectively with carbamide injection valve, and liquid way reversing valve is set on urea pipe.
2. pneumatic duplex metering injection system according to claim 1, is characterized in that: the urea pipe between liquid way reversing valve and carbamide injection valve is provided with pressure transducer.
3. pneumatic duplex metering injection system according to claim 1, is characterized in that: sap cavity is comprised of left liquid cavity and right liquid cavity, and air cavity is comprised of left air cavity and right air cavity.
4. pneumatic duplex metering injection system according to claim 3, is characterized in that: left air cavity and right air cavity are respectively provided with a position limit switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320699134.8U CN203532028U (en) | 2013-11-06 | 2013-11-06 | Pneumatic duplex measurement injecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320699134.8U CN203532028U (en) | 2013-11-06 | 2013-11-06 | Pneumatic duplex measurement injecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203532028U true CN203532028U (en) | 2014-04-09 |
Family
ID=50418244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320699134.8U Expired - Fee Related CN203532028U (en) | 2013-11-06 | 2013-11-06 | Pneumatic duplex measurement injecting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203532028U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603713A (en) * | 2013-11-06 | 2014-02-26 | 天津亿利汽车环保科技有限公司 | Pneumatic duplex measurement and injection system |
-
2013
- 2013-11-06 CN CN201320699134.8U patent/CN203532028U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603713A (en) * | 2013-11-06 | 2014-02-26 | 天津亿利汽车环保科技有限公司 | Pneumatic duplex measurement and injection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20181106 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |