CN208718762U - A kind of urea liquid feedway of no air auxiliary - Google Patents
A kind of urea liquid feedway of no air auxiliary Download PDFInfo
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- CN208718762U CN208718762U CN201821228420.5U CN201821228420U CN208718762U CN 208718762 U CN208718762 U CN 208718762U CN 201821228420 U CN201821228420 U CN 201821228420U CN 208718762 U CN208718762 U CN 208718762U
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- urea liquid
- accumulation chamber
- urea
- pressure accumulation
- supply pump
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Abstract
The utility model discloses a kind of urea liquid feedways of no air auxiliary, it includes shell and the urea liquid supply pump being integrated on shell, reversing valve assembly, pressure accumulation chamber, automatically controlled nozzle and controller, the urea liquid supply pump is connected by inner flow passage with the reversing valve assembly, the reversing valve assembly is connected by inner flow passage with the pressure accumulation chamber, pressure sensor and overflow valve are installed on the pressure accumulation chamber, the overflow valve front end is connected by inner flow passage with the pressure accumulation chamber, its rear end is connected by pipeline with urea tank, the automatically controlled nozzle is connected by pipeline with pressure accumulation chamber, the controller and urea liquid supply pump, reversing valve assembly is connected with pressure sensor communication.The urea liquid feedway of above-mentioned no air auxiliary is not only simple in structure, small in size；And at low cost, stable and reliable operation, injection control precision are high.
Description
Technical field
The utility model relates to the SCR spraying systems in diesel engine vent gas post-processing, are used for diesel oil more particularly, to one kind
The urea liquid feedway without air auxiliary of SCR spraying system in tail gas post-processing.
Background technique
Refer to for selective catalytic conversion system of diesel engine SCR (SelectiveCatalystReduction) and is mounted on
In diesel engine automobile air exhausting system, the NOx in diesel emission is catalysed and reduced into N2And O2Catalytic reduction device, select urea
Aqueous solution is as reducing agent.Aqueous solution of urea is ejected into the exhaust pipe of catalyst upstream, in the effect of exhaust gas temperature and air-flow
Lower hydrolysis is produced as CO2And NOx is reduced into free of contamination nitrogen and water as reducing agent by ammonia, ammonia.
Urea liquid feedway is essential important component in SCR system, however, existing major part urea is molten
Liquid supplying device is generally existing, and structure is complicated, at high cost and poor reliability and the shortcomings that urea, the serious hair for hindering SCR system
Exhibition, and heavy burden is brought to user.
Utility model content
The purpose of this utility model is to provide a kind of urea liquid feedways of no air auxiliary, to solve existing skill
Art urea liquid feedway has that structure is complicated, poor reliability and injection control low precision.
For this purpose, the utility model uses following technical scheme:
A kind of urea liquid feedway of no air auxiliary comprising shell and the urea liquid being integrated on shell
Supply pump, reversing valve assembly, pressure accumulation chamber, automatically controlled nozzle and controller, the urea liquid supply pump pass through inner flow passage and institute
It states reversing valve assembly to be connected, the reversing valve assembly is connected by inner flow passage with the pressure accumulation chamber, on the pressure accumulation chamber
Pressure sensor and overflow valve are installed, the overflow valve front end is connected by inner flow passage with the pressure accumulation chamber, its rear end
It is connected by pipeline with urea tank, the automatically controlled nozzle is connected by pipeline with pressure accumulation chamber, the controller and urea liquid
Supply pump, reversing valve assembly are connected with pressure sensor communication.
Particularly, the urea liquid supply pump, reversing valve assembly and pressure accumulation chamber three arrange in shell in " product " font
Cloth.
Particularly, it is also equipped with temperature sensor on the pressure accumulation chamber, the controller is connect with temperature sensor communication.
Particularly, between two ports of the reversing valve assembly and the inlet and liquid outlet of urea liquid supply pump simultaneously
There are two liquid non-return valves for connection setting, and the check of described two liquid non-return valves is contrary.
Particularly, the urea liquid supply pump uses urea gear pump.
The beneficial effects of the utility model are the urea liquid feedway that the no air assists compared with prior art
It is not only simple in structure, it is small in size；And at low cost, stable and reliable operation, injection control precision are high.
Detailed description of the invention
Fig. 1 is the three-dimensional knot for the urea liquid feedway without air auxiliary that specific embodiment of the present invention provides
Structure schematic diagram；
Fig. 2 is that the system for the urea liquid feedway without air auxiliary that specific embodiment of the present invention provides is former
Reason figure.
Specific embodiment
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
It please refers to shown in Fig. 1 and Fig. 2, in the present embodiment, a kind of urea liquid feedway of no air auxiliary includes shell
Body 1 and the urea liquid supply pump 2 being integrated on shell 1, reversing valve assembly 3, pressure accumulation chamber 4, automatically controlled nozzle and electronic control
Device, urea liquid supply pump 2, reversing valve assembly 3 and 4 three of pressure accumulation chamber arrange in shell 1 in " product " font, and urea liquid
Supply pump 2 uses urea gear pump, and urea liquid supply pump 2 is connected by inner flow passage with reversing valve assembly 3, and commutate valve group
Part 3 is connected by inner flow passage with pressure accumulation chamber 4, the inlet of two ports and urea liquid supply pump 2 of reversing valve assembly 3
Liquid non-return valve 5 there are two being arranged in parallel between liquid outlet, and the check of two liquid non-return valves 5 is contrary.
Pressure sensor 6, temperature sensor 7 and overflow valve 8 are installed, 8 front end of overflow valve passes through inside stream on pressure accumulation chamber 4
Road is connected with pressure accumulation chamber 4, and its rear end is connected by pipeline with urea tank 9, and automatically controlled nozzle is connected by pipeline with pressure accumulation chamber 4
Logical, electronic controller and urea liquid supply pump 2, reversing valve assembly 3 and pressure sensor 6 and temperature sensor 7 communicate to connect.
Electronic controller acquires pressure sensor 6 and 7 signal of temperature sensor by internal harness, and controls urea according to internal processes
Solution supply pump 2 and reversing valve assembly 3 work, and electronic controller passes through the opening time for controlling automatically controlled nozzle, to control urea
The amount of injection.
After diesel engine starting, delivery temperature reaches calibration value, the extracted urea from urea tank 9 of urea liquid supply pump 2
Solution enters pressure accumulation chamber 4 by reversing valve assembly 3, and urea is full of pressure accumulation chamber 4, and extra urea is back to urine by overflow valve 8
Plain tank 9, urea establish pressure in pressure accumulation chamber 4.Electronic controller controls the opening time of automatically controlled nozzle according to internal processes, comes
Control sprays into the urea amount of exhaust pipe.After electricity is shut down under diesel engine, electronic controller control reversing valve assembly 3 commutates,
Urea in pressure accumulation chamber 4 and urea pipe is drawn back in urea tank 9, urea crystals plug nozzle is prevented.
Above embodiments only elaborate the basic principles and features of the present invention, 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 present invention has various changes and changes, these changes
Change and change is fallen within the scope of the claimed invention.The utility model requires protection scope is wanted by appended right
Ask book and its equivalent thereof.
Claims (5)
1. a kind of urea liquid feedway of no air auxiliary, which is characterized in that it includes shell and is integrated on shell
Urea liquid supply pump, reversing valve assembly, pressure accumulation chamber, automatically controlled nozzle and controller, the urea liquid supply pump passes through interior
Portion's runner is connected with the reversing valve assembly, and the reversing valve assembly is connected by inner flow passage with the pressure accumulation chamber, institute
It states and pressure sensor and overflow valve is installed on pressure accumulation chamber, the overflow valve front end is connected by inner flow passage with the pressure accumulation chamber
Logical, its rear end is connected by pipeline with urea tank, and the automatically controlled nozzle is connected by pipeline with pressure accumulation chamber, the controller and
Urea liquid supply pump, reversing valve assembly are connected with pressure sensor communication.
2. the urea liquid feedway of no air auxiliary according to claim 1, which is characterized in that the urea liquid
Supply pump, reversing valve assembly and pressure accumulation chamber three arrange in shell in " product " font.
3. the urea liquid feedway of no air auxiliary according to claim 1, which is characterized in that on the pressure accumulation chamber
It is also equipped with temperature sensor, the controller is connect with temperature sensor communication.
4. the urea liquid feedway of no air auxiliary according to claim 1, which is characterized in that the commutation valve group
Liquid non-return valve there are two being arranged in parallel between two ports of part and the inlet and liquid outlet of urea liquid supply pump, and institute
The check for stating two liquid non-return valves is contrary.
5. the urea liquid feedway of no air auxiliary according to claim 1, which is characterized in that the urea liquid
Supply pump uses urea gear pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821228420.5U CN208718762U (en) | 2018-08-01 | 2018-08-01 | A kind of urea liquid feedway of no air auxiliary |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821228420.5U CN208718762U (en) | 2018-08-01 | 2018-08-01 | A kind of urea liquid feedway of no air auxiliary |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208718762U true CN208718762U (en) | 2019-04-09 |
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ID=65975690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821228420.5U Active CN208718762U (en) | 2018-08-01 | 2018-08-01 | A kind of urea liquid feedway of no air auxiliary |
Country Status (1)
| Country | Link |
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| CN (1) | CN208718762U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483229A (en) * | 2020-12-11 | 2021-03-12 | 武汉洛特福动力技术有限公司 | Liquid return buffer device of urea supply pump |
| CN114151177A (en) * | 2021-12-06 | 2022-03-08 | 凯龙高科技股份有限公司 | Urea returns integrated overflow valve device of liquid |
-
2018
- 2018-08-01 CN CN201821228420.5U patent/CN208718762U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483229A (en) * | 2020-12-11 | 2021-03-12 | 武汉洛特福动力技术有限公司 | Liquid return buffer device of urea supply pump |
| CN114151177A (en) * | 2021-12-06 | 2022-03-08 | 凯龙高科技股份有限公司 | Urea returns integrated overflow valve device of liquid |
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