CN207634149U - A kind of urea supply system with high-pressure blowing function - Google Patents
A kind of urea supply system with high-pressure blowing function Download PDFInfo
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- CN207634149U CN207634149U CN201721425661.4U CN201721425661U CN207634149U CN 207634149 U CN207634149 U CN 207634149U CN 201721425661 U CN201721425661 U CN 201721425661U CN 207634149 U CN207634149 U CN 207634149U
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Abstract
The utility model discloses a kind of urea supply systems with high-pressure blowing function, it includes urea liquid feeding assembly, compressed air feeding assembly and mixing chamber, the compressed air feeding assembly includes sequentially connected compressed air inlet, electromagnetic valve component and air pressure check valve, the electromagnetic valve component is connected by outlet pipe with mixing chamber, and the electromagnetic valve component includes pressure-air solenoid valve, regulated air solenoid valve and pressure maintaining valve, the compressed air intlet of compressed air is divided into two-way, enter outlet pipe through regulated air solenoid valve and pressure maintaining valve all the way, another way enters outlet pipe through pressure-air solenoid valve.Above-mentioned urea supply system uses the low-pressure air after voltage stabilizing when urea pump works normally；And when shutting down purging, the pressure-air using another way not Jing Guo voltage stabilizing carries out pipeline purging, may make remaining urea liquid that can purge cleaner, reduces and the risk that air pipe line crystallizes occurs.
Description
Technical field
The utility model belongs to diesel engine vent gas treatment technology, more particularly, to a kind of tool for diesel engine vent gas processing
There is the urea supply system of high-pressure blowing function.
Background technology
Continuous stringent with state motor vehicle exhaust emissions limit value, the diesel engine as motor vehicle power must install tail additional
Flash Gas Compression Skid System gets to the requirement of regulation.For diesel engine, SCR system (selective catalytic reduction system operating) technology is
A kind of exhaust gas processing device of most economical practicality.SCR system is by urea for vehicle aqueous solution by required metered injection to bavin
In the catalyst converter of oil machine exhaust pipe, the oxynitrides (NOx) in urea liquid and diesel engine vent gas under the catalysis of catalyst,
Catalytic reduction reaction is formed, (NOx) is reduced into harmless water and nitrogen.
Core component one of of the urea pump as SCR system, in heavy-duty diesel vehicle, at present using it is more be using pressure
Contracting air come push urea liquid and make its be atomized a kind of air-assisted injection urea pump.The advantages of this urea pump is urea
Solution is mixed with compressed air inside urea pump, and the jet atomization effect of urea liquid is good, can reach higher catalysis
Reaction efficiency.
This air-assisted injection urea pump is the stabilization for ensureing injection back pressure, and all there are one compressed air voltage stabilizings for design
Valve, the pressure-air introduced from vehicle (generally 0.6-1MPa) is after voltage stabilizing, (generally with pressure that is lower and stablizing
It 0.3-0.4MPa) is mixed with urea liquid, to ensure the pressure stability of mixing chamber, it is ensured that the measuring accuracy of injection.In reality
In use, this urea pump is easier to, there is a phenomenon where urea liquids to backflow into air pipe line on border, especially close to mixing chamber
Air pipe line.Urea liquid backflows and cannot such as purge after air pipe line clean, then it is empty to will produce urea liquid Crystallization Plugging
Air pipe causes urea pump to fail.Therefore, the urea pump of this kind of air-assisted injection all devises one and shuts down purging program,
I.e. before urea pump shutdown, air pipe line and mixing chamber and subsequent pipeline are blown using the compressed air after voltage stabilizing
It sweeps, remaining urea liquid is blown out, prevent urea liquid crystalline polamer.But the low-pressure air after voltage stabilizing is often difficult to
Urea liquid purging is clean, and the failure of air pipe line crystallization still happens occasionally.
Utility model content
It is existing to solve the purpose of this utility model is to provide a kind of urea supply system with high-pressure blowing function
Air-assisted injection urea pump there is a problem of being difficult to purging the urea liquid in air pipe line clean in technology.
For this purpose, the utility model uses following technical scheme：
A kind of urea supply system with high-pressure blowing function comprising urea liquid feeding assembly, compressed air supply
To component and mixing chamber, the outlet end of the urea liquid feeding assembly is connected with the mixing chamber, and the compressed air supplies
It is connected with the mixing chamber to the outlet side of component, mixed gas outlet is provided on the mixing chamber, wherein the compression is empty
Gas feeding assembly includes compressed air inlet, electromagnetic valve component and air pressure check valve, and the compressed air inlet passes through air inlet pipe
Road connects the inlet end of electromagnetic valve component, and the outlet side of the electromagnetic valve component is connected by outlet pipe with mixing chamber, institute
Setting air pressure check valve on outlet pipe is stated, and the electromagnetic valve component includes pressure-air solenoid valve, regulated air solenoid valve
And pressure maintaining valve, the compressed air intlet of compressed air are divided into two-way, enter outlet through regulated air solenoid valve and pressure maintaining valve all the way
Pipeline, another way enter outlet pipe through pressure-air solenoid valve.
Particularly, the urea liquid feeding assembly includes hydraulic pump, hydraulic cavities and hydraulically-controlled one-way valve, and the hydraulic pump is set
Set inlet, the outlet end of the hydraulic pump is connected with hydraulic cavities, the outlet ends of the hydraulic cavities by hydraulically-controlled one-way valve with
The mixing chamber is connected.
Particularly, the pressure maintaining valve is sent into the back segment that direction is set to the regulated air solenoid valve along compressed air.
Particularly, the pressure maintaining valve is sent into the leading portion that direction is set to the regulated air solenoid valve along compressed air.
Particularly, when shutting down purging, the regulated air solenoid valve is closed.
Particularly, when shutting down purging, the regulated air solenoid valve is in the open state.
Particularly, the air pressure check valve is set in the mixing chamber.
Particularly, the hydraulically-controlled one-way valve is set in the hydraulic cavities.
The beneficial effects of the utility model are, compared with prior art the urea supply system with high-pressure blowing function
System uses the low-pressure air after voltage stabilizing when urea pump works normally；And when shutting down purging, do not passed through using another way
The pressure-air of voltage stabilizing carries out pipeline purging, is not only simple in structure, it is easy to accomplish；And it may make remaining urea liquid that can blow
That sweeps is cleaner, reduces the risk that air pipe line crystallization occurs.
Description of the drawings
Fig. 1 is that the urea supply system with high-pressure blowing function that specific embodiment of the present invention 1 provides is
System schematic diagram.
Specific implementation mode
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
Refering to Figure 1, Fig. 1 is the urine with high-pressure blowing function that specific embodiment of the present invention 1 provides
The systematic schematic diagram of plain feed system.
In the present embodiment, a kind of urea supply system with high-pressure blowing function includes urea liquid feeding assembly 1, pressure
Contracting air intlet 2, electromagnetic valve component 3, air pressure check valve 4 and mixing chamber 5, the compressed air inlet 2 are connected by air inlet pipeline 6
The inlet end of electromagnetic valve component 3 is connect, the outlet side of the electromagnetic valve component 3 is connected by outlet pipe 7 with mixing chamber 5, institute
It states air pressure check valve 4 to be set on outlet pipe 7 and be located in the mixing chamber 5, the electromagnetic valve component 3 includes pressure-air
Solenoid valve 30, regulated air solenoid valve 31 and pressure maintaining valve 32, the pressure maintaining valve 32 are set to described along compressed air feeding direction
The back segment of regulated air solenoid valve 31.The compressed air intlet of compressed air 2 divides for two-way, all the way through regulated air solenoid valve 31
Enter outlet pipe 7 with pressure maintaining valve 32, another way enters outlet pipe 7 through pressure-air solenoid valve 30, in the outlet pipe 7
Air through air pressure check valve 4 enter mixing chamber 5 in, mixed gas outlet 8 is provided on the mixing chamber 5.
The urea liquid feeding assembly 1 includes hydraulic pump 10, hydraulic cavities 11 and hydraulically-controlled one-way valve 12, the hydraulic pump 10
Inlet 13 is set, and the outlet end of the hydraulic pump 10 is connected with hydraulic cavities 11, and the outlet end of the hydraulic cavities 11 passes through liquid
Pressure check valve 12 is connected with the mixing chamber 5, and the hydraulically-controlled one-way valve 12 is set in the hydraulic cavities 11.
When urea pump works normally, hydraulic pump 10 and regulated air solenoid valve 31 are opened, and pressure-air solenoid valve 30 closes
It closing, the low-pressure compressed air after voltage stabilizing after mixing chamber 5 mixes forms gaseous mixture by air pressure check valve 4 with urea liquid,
It is sprayed through mixed gas outlet 8.
When shutting down purging, pressure-air solenoid valve 30 is opened, and connects high pressure airline, and urea pump is not had using another way
There is the pressure-air by voltage stabilizing to carry out pipeline purging, regulated air solenoid valve 31 may be at closed state at this time, can also
In open state.After shutting down purging, regulated air solenoid valve 31 and pressure-air solenoid valve 30 are turned off.
Above example is to elaborate the basic principle and characteristic of the utility model, and the utility model is not by above-mentioned example
Limitation, on the premise of not departing from the spirit and scope of the utility model, the utility model also has various changes, these changes
Change and change and both falls in claimed the scope of the utility model.The utility model requires protection scope is wanted by appended right
Ask book and its equivalent thereof.
Claims (8)
1. a kind of urea supply system with high-pressure blowing function comprising urea liquid feeding assembly, compressed air supply
The outlet end of component and mixing chamber, the urea liquid feeding assembly is connected with the mixing chamber, the compressed air supply
The outlet side of component is connected with the mixing chamber, and mixed gas outlet is provided on the mixing chamber, which is characterized in that the pressure
Contracting air feeding assembly includes compressed air inlet, electromagnetic valve component and air pressure check valve, the compressed air inlet by into
Air pipe connects the inlet end of electromagnetic valve component, and the outlet side of the electromagnetic valve component is connected by outlet pipe with mixing chamber
It is logical, air pressure check valve is set on the outlet pipe, and the electromagnetic valve component includes pressure-air solenoid valve, regulated air electricity
Magnet valve and pressure maintaining valve, the compressed air intlet of compressed air are divided into two-way, enter all the way through regulated air solenoid valve and pressure maintaining valve
Outlet pipe, another way enter outlet pipe through pressure-air solenoid valve.
2. the urea supply system according to claim 1 with high-pressure blowing function, which is characterized in that the urea is molten
Liquid feeding assembly includes hydraulic pump, hydraulic cavities and hydraulically-controlled one-way valve, and inlet is arranged in the hydraulic pump, and the hydraulic pump goes out liquid
End is connected with hydraulic cavities, and the outlet end of the hydraulic cavities is connected by hydraulically-controlled one-way valve with the mixing chamber.
3. the urea supply system according to claim 1 or 2 with high-pressure blowing function, which is characterized in that described steady
Pressure valve is sent into the back segment that direction is set to the regulated air solenoid valve along compressed air.
4. the urea supply system according to claim 1 or 2 with high-pressure blowing function, which is characterized in that described steady
Pressure valve is sent into the leading portion that direction is set to the regulated air solenoid valve along compressed air.
5. the urea supply system according to claim 1 or 2 with high-pressure blowing function, which is characterized in that shutdown is blown
When sweeping, the regulated air solenoid valve is closed.
6. the urea supply system according to claim 1 or 2 with high-pressure blowing function, which is characterized in that shutdown is blown
When sweeping, the regulated air solenoid valve is in the open state.
7. the urea supply system according to claim 1 with high-pressure blowing function, which is characterized in that the air pressure list
It is set in the mixing chamber to valve.
8. the urea supply system according to claim 2 with high-pressure blowing function, which is characterized in that the hydraulic pressure list
It is set in the hydraulic cavities to valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721425661.4U CN207634149U (en) | 2017-10-31 | 2017-10-31 | A kind of urea supply system with high-pressure blowing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721425661.4U CN207634149U (en) | 2017-10-31 | 2017-10-31 | A kind of urea supply system with high-pressure blowing function |
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| Publication Number | Publication Date |
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| CN207634149U true CN207634149U (en) | 2018-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721425661.4U Active CN207634149U (en) | 2017-10-31 | 2017-10-31 | A kind of urea supply system with high-pressure blowing function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701272A (en) * | 2017-10-31 | 2018-02-16 | 凯龙高科技股份有限公司 | A kind of urea supply system with high-pressure blowing function |
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2017
- 2017-10-31 CN CN201721425661.4U patent/CN207634149U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701272A (en) * | 2017-10-31 | 2018-02-16 | 凯龙高科技股份有限公司 | A kind of urea supply system with high-pressure blowing function |
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