CN208718764U - A kind of urea pump of no air auxiliary - Google Patents
A kind of urea pump of no air auxiliary Download PDFInfo
- Publication number
- CN208718764U CN208718764U CN201821228442.1U CN201821228442U CN208718764U CN 208718764 U CN208718764 U CN 208718764U CN 201821228442 U CN201821228442 U CN 201821228442U CN 208718764 U CN208718764 U CN 208718764U
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- Prior art keywords
- pump
- urea
- accumulation chamber
- pressure accumulation
- inlet
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Abstract
The utility model discloses a kind of urea pumps of no air auxiliary, it includes the pump housing, gear pump and pressure accumulation chamber are provided in the pump housing, the gear pump is connected by inner passage with pressure accumulation chamber, the first inlet is provided on the gear pump, liquid outlet and overflow port, an overflow valve is equipped in the overflow port, the second inlet is provided on the pressure accumulation chamber, jet port and liquid return hole, first inlet is connected by pipeline with urea tank, the liquid outlet is connected by pipeline with the second inlet, the overflow port is connected by pipeline with liquid return hole, the liquid return hole is connected with urea tank, the jet port is connected with nozzle by injection line, pressure sensor is installed on the pressure accumulation chamber, electronic control unit is connect with gear pump and pressure sensor communication.The urea pump of above-mentioned no air auxiliary is not only simple in structure, compact, light-weight, 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 pump 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 pump is essential important component in SCR system, however, the generally existing knot of existing major part urea pump
Structure complexity, poor reliability and disadvantage at high cost.
Utility model content
The purpose of this utility model is to provide a kind of urea pumps of no air auxiliary, are deposited with solving prior art urea pump
Structure is complicated, poor reliability and problem at high cost.
For this purpose, the utility model uses following technical scheme:
A kind of urea pump of no air auxiliary comprising the pump housing is provided with gear pump and pressure accumulation chamber in the pump housing, described
Gear pump is connected by inner passage with pressure accumulation chamber, wherein is provided with the first inlet, liquid outlet on the gear pump and is overflow
Head piece, the overflow port is interior to be equipped with an overflow valve, is provided with the second inlet, jet port and liquid return hole on the pressure accumulation chamber,
First inlet is connected by pipeline with urea tank, and the liquid outlet is connected by pipeline with the second inlet, institute
It states overflow port and is connected by pipeline with liquid return hole, the liquid return hole is connected with urea tank, and the jet port passes through injection pipe
Road is connected with nozzle, is equipped with pressure sensor on the pressure accumulation chamber, electronic control unit with gear pump and pressure sensor
Communication connection.
Particularly, temperature sensor is also equipped on the pressure accumulation chamber.
Particularly, the temperature sensor and pressure sensor pass through helicitic texture and connect with pressure accumulation chamber.
Particularly, the jet port is connected with nozzle, the electronic control unit and nozzle communication link by injection line
It connects, to control the opening time of nozzle.
Particularly, electronic control unit control gear pump with setting speed forward or reverse, to realize urea liquid
Supply and pumpback.
The beneficial effects of the utility model are the urea pump not only structure letter of the no air auxiliary compared with prior art
It is single, it is compact, it is light-weight, 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 schematic perspective view for the urea pump without air auxiliary that specific embodiment of the present invention provides；
Fig. 2 is the vertical of the end cap of the gear pump for the urea pump without air auxiliary that specific embodiment of the present invention provides
Body structural schematic diagram；
Fluid path when Fig. 3 is the normal work for the urea pump without air auxiliary that specific embodiment of the present invention provides
Schematic diagram；
When Fig. 4 is the pumpback urea liquid for the urea pump without air auxiliary that specific embodiment of the present invention provides
Fluid path schematic diagram.
Specific embodiment
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
Shown in please referring to Fig.1 to Fig.4, in the present embodiment, a kind of urea pump of no air auxiliary includes the pump housing 1, the pump
Gear pump 2 and pressure accumulation chamber 3 are provided in body 1, the gear pump 2 is connected by inner passage with pressure accumulation chamber 3, the gear pump
It is provided with the first inlet 20, liquid outlet 21 and overflow port 22 on 2, is equipped with an overflow valve 23, pressure accumulation in the overflow port 22
The second inlet 30, jet port 31 and liquid return hole 32 are provided on chamber 3, first inlet 20 passes through pipeline and urea tank 7
It is connected, the liquid outlet 21 is connected by pipeline with the second inlet 30, and overflow port 22 passes through pipeline and 32 phase of liquid return hole
Connection, liquid return hole 32 are connected with urea tank 7, and jet port 31 is connected with automatically controlled nozzle 8, temperature sensor 4 by injection line
It is connected on pressure accumulation chamber 3 by helicitic texture with pressure sensor 5.
Electronic control unit 6 is communicated to connect with gear pump 2, pressure sensor 5, temperature sensor 4 and nozzle respectively, electronics
Control unit 6 can control gear pump 2 with the positive and negative operating of setting speed, and electronic control unit 6 can be real by pressure sensor 5
When monitoring injection line in urea pressure, electronic control unit 6 controls the opening time of automatically controlled nozzle 8 according to internal processes,
To control the accuracy of spray of urea.
After diesel engine starting, delivery temperature reaches calibration value, and electronic control unit 6 controls gear pump 2 with certain revolving speed
Positive work, the extracted urea solution from urea tank 7, urea are full of the urea injection line that connect with pump housing jet port and automatically controlled
Nozzle 8, and certain pressure is established in it, the overflow valve 23 set in the overflow port 22 that extra urea passes through gear pump 2 passes through
The liquid return hole 32 for crossing pressure accumulation chamber 3 is back to urea tank 7, and electronic control unit 6 can be monitored in real time by pressure sensor 5 at this time
Urea pressure in injection line.Electronic control unit 6 controls the opening time of automatically controlled nozzle 8 according to internal processes, to control
The accuracy of spray of antidiuresis element.After electricity under diesel engine, electronic control unit 6 controls 2 antiport of gear pump, by urea pipe and
Urea in automatically controlled nozzle is drawn back in urea tank 7, and urea crystals are 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 pump of no air auxiliary comprising the pump housing is provided with gear pump and pressure accumulation chamber, the tooth in the pump housing
Wheel pump is connected by inner passage with pressure accumulation chamber, which is characterized in that the first inlet, liquid outlet are provided on the gear pump
And overflow port, the overflow port is interior to be equipped with an overflow valve, and the second inlet, jet port are provided on the pressure accumulation chamber and returns liquid
Mouthful, first inlet is connected by pipeline with urea tank, and the liquid outlet is connected by pipeline with the second inlet,
The overflow port is connected by pipeline with liquid return hole, and the liquid return hole is connected with urea tank, and the jet port passes through injection
Piping connection has nozzle, is equipped with pressure sensor on the pressure accumulation chamber, electronic control unit with gear pump and pressure sensing
Device communication connection.
2. the urea pump of no air auxiliary according to claim 1, which is characterized in that be also equipped with temperature on the pressure accumulation chamber
Spend sensor.
3. the urea pump of no air auxiliary according to claim 2, which is characterized in that the temperature sensor and pressure pass
Sensor passes through helicitic texture and connect with pressure accumulation chamber.
4. the urea pump of no air auxiliary according to claim 1, which is characterized in that the jet port passes through injection line
It is connected with nozzle, the electronic control unit and nozzle communicate to connect.
5. the urea pump of no air auxiliary according to claim 1, which is characterized in that the electronic control unit controls tooth
Wheel pump with setting speed forward or reverse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821228442.1U CN208718764U (en) | 2018-08-01 | 2018-08-01 | A kind of urea pump of no air auxiliary |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821228442.1U CN208718764U (en) | 2018-08-01 | 2018-08-01 | A kind of urea pump of no air auxiliary |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208718764U true CN208718764U (en) | 2019-04-09 |
Family
ID=65975688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821228442.1U Active CN208718764U (en) | 2018-08-01 | 2018-08-01 | A kind of urea pump of no air auxiliary |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208718764U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108625958A (en) * | 2018-08-01 | 2018-10-09 | 凯龙高科技股份有限公司 | A kind of urea pump of no air auxiliary |
| 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 CN201821228442.1U patent/CN208718764U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108625958A (en) * | 2018-08-01 | 2018-10-09 | 凯龙高科技股份有限公司 | A kind of urea pump of no air auxiliary |
| 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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