CN207740067U - A kind of urea pumping system - Google Patents
A kind of urea pumping system Download PDFInfo
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- CN207740067U CN207740067U CN201720992677.7U CN201720992677U CN207740067U CN 207740067 U CN207740067 U CN 207740067U CN 201720992677 U CN201720992677 U CN 201720992677U CN 207740067 U CN207740067 U CN 207740067U
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- urea
- pump
- solenoid valve
- pumping system
- accumulator
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Abstract
The utility model discloses a kind of urea pumping systems, urea box including passing sequentially through piping connection, urea pump module, accumulator and nozzle module, urea pump module includes being arranged in parallel for the auxiliary pump by the liquid pumping in urea box to the main pump of nozzle module and for the liquid in pipeline reversely to be aspirated back to urea box, nozzle module includes the first solenoid valve and atomizer, first solenoid valve passes through piping connection accumulator and atomizer respectively, the return line being connected to urea box is provided on pipeline between first solenoid valve and accumulator, the first damping hole is offered on return line.The urea pumping system of the utility model, using no air-assisted structure, by using two parallel pumps, when realizing injection urea liquid, main pump starts, from pumping urea liquid in urea box to from nozzle module；The urea liquid resorption for remaining in internal system to urea box, is solved the problems, such as urea crystals, blocking pipeline by AEI After End of Injection, auxiliary pump.
Description
Technical field
This application involves diesel motor exhaust post-processing technology field more particularly to a kind of no air-assisted urea pumps
Send system.
Background technology
Internal purification technology can not fully meet increasingly harsh discharge standard, therefore install tail gas additional to diesel engine
After-treatment device becomes necessity.The post-processing technology of mainstream is SCR technology at present, that is, urea liquid is used to be purified as reducing agent
Nitrogen oxides in tail gas.Urea pumping system includes mainly：Store the urea box, urea in urea box is molten of urea liquid
Urea pump that liquid is pumped into exhaust pipe, the urea liquid level sensor for detecting the liquid level in urea box, and prevent urea
The cooling water system of crystallization.What application was more on the market is air-assisted urea pumping system, wherein compressed gas source is added,
Blast injection clean pipeline in urea raffinate, such system structure is more complex, in pipeline still can residual urea crystallization, block up
Plug problem is serious, and load compressed gas source is also needed in system, and above-mentioned factor all limits its further genralrlization application.In addition,
There are also non-gas to help formula urea pumping system, and technology is not overripened, and there is also remain urine in the not in place, pipeline similar to resorption
The problems such as plain solution.
Therefore, it is necessary to research and develop a kind of perfect, feasible urea pumping system, to meet the needs of this field.
Utility model content
The purpose of this utility model is that a kind of urea pumping system of novel no air-assisted is proposed, to solve routine
Urea pumping system structure is complicated, urea easily crystallizes, blocks the problem of serious, required compressed gas source.
In order to achieve the above object, the utility model uses following technical scheme：
A kind of urea pumping system, including pass sequentially through the urea box of piping connection, urea pump module, accumulator and nozzle
Module, which is characterized in that urea pump module include be arranged in parallel for by the liquid pumping in urea box to nozzle module
Main pump and for by the reversed auxiliary pump for aspirate back urea box of the liquid in pipeline, nozzle module include the first solenoid valve and are atomized spray
Mouth, the first solenoid valve is respectively by piping connection accumulator and atomizer, on the pipeline between the first solenoid valve and accumulator
It is provided with the return line being connected to urea box, the first damping hole is offered on return line.
Main pump forward direction conveys solution, the reversed resorption residual solution of auxiliary pump, effectively solves residual urea crystallization, blocking pipeline
Problem.The first damping hole on return line is used for system loads, good relative to valve like members load effect, does not cause space
It is closed and at low cost.
Wherein, it is both provided with filter on the both ends connecting line of urea pump module.Keep line clear.
Wherein, main pump includes Electric-motor driven pumps, and inlet pipe and the outlet tube roads of Electric-motor driven pumps is respectively arranged with the
One import flat valve and first outlet flat valve.So that main pump can only forward direction pump solution, prevent from flowing backwards.
Wherein, auxiliary pump includes the electromagnetic drive pump that is arranged in series and second solenoid valve, the inlet pipe of electromagnetic drive pump and
Outlet tube road is respectively arranged with the second import flat valve and second outlet flat valve.So that auxiliary pump can only reversed resorption solution,
It prevents from flowing backwards.
Wherein, electromagnetic drive pump may be used integrated mode with second solenoid valve and share electromagnet.Work as electromagnetic drive pump
When startup, second solenoid valve is also turned on；When electromagnetic drive pump stops, double insurance is played in second solenoid valve open circuit simultaneously
Effect.In view of the synchronism of the two, it is possible to share electromagnet.Second solenoid valve uses two-position two-way solenoid valve structure
.
Alternatively, electromagnetic drive pump can also respectively drive with second solenoid valve.
Wherein, the outlet tube road of the first solenoid valve is provided with the second damping hole for being atomized urea liquid.First electricity
Magnet valve is used to control the folding of nozzle using two-position two-way solenoid valve.It should be noted that in auxiliary pump startup resorption, the first electricity
Magnet valve need to coordinate unlatching, to ensure that liquid can be sucked totally in the pipeline.
Wherein, return line could be provided as connecting with accumulator, and pressure sensor is additionally provided on return line.Pressure
Sensor is used for signal piping pressure.
Alternatively, return line can also be connect with the inlet pipe of the first solenoid valve, the company of accumulator and the first solenoid valve
It takes over road and is provided with pressure sensor.
The beneficial effects of the utility model are that the urea pumping system, auxiliary using no air compared with prior art
Formula structure is helped, by using two parallel pumps, when realizing injection urea liquid, main pump starts, and urea liquid is aspirated from urea box,
It is pumped at nozzle module by pipeline, urea liquid is measured by controlling the opening time of solenoid valve；AEI After End of Injection, it is auxiliary
The urea liquid resorption for remaining in internal system to urea box, is solved the problems, such as urea crystals, blocking pipeline, and returning by pump
Install damping hole in flow tube road additional, not only pressure stability is high but also at low cost, noise is small.
Description of the drawings
Fig. 1 is the structural schematic diagram for the urea pumping system that the utility model embodiment 1 provides；
Fig. 2 is the structural schematic diagram for the urea pumping system that the utility model embodiment 2 provides；
Fig. 3 is the structural schematic diagram for the urea pumping system that the utility model embodiment 3 provides.
Specific implementation mode
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
Embodiment 1：
As shown in Figure 1, the urea pumping system in the present embodiment, including pass sequentially through urea box 1, the urea of piping connection
Pump module 2, accumulator 3 and nozzle module 4, urea pump module 2 are used for including what is be arranged in parallel by the liquid pumping in urea box 1
Main pump 21 to nozzle module 4 and the auxiliary pump 22 for the liquid in pipeline reversely to be aspirated back to urea box 1, nozzle module 4 wrap
The first solenoid valve 41 and atomizer are included, the first solenoid valve 41 passes through piping connection accumulator 3 and atomizer, the first electricity respectively
It is provided with the return line 11 being connected to urea box 1 on pipeline between magnet valve 41 and accumulator 3, is offered on return line 11
First damping hole 111.
The positive conveying solution of main pump 21,22 reversed resorption residual solutions of auxiliary pump effectively solve residual urea crystallization, block pipe
The problem of road.The first damping hole 111 on return line 11 is used for system loads, good relative to valve like members load effect, no
Airtight space is caused, and at low cost.
It is both provided with filter on the both ends connecting line of urea pump module 2, keeps line clear.
Main pump 21 includes Electric-motor driven pumps 211, and inlet pipe and the outlet tube road of Electric-motor driven pumps 211 are respectively arranged with
First import flat valve 212 and first outlet flat valve 213 so that main pump 21 can only forward direction pump solution, prevent from flowing backwards.
Auxiliary pump 22 includes the electromagnetic drive pump 221 being arranged in series and second solenoid valve 224, the feed liquor of electromagnetic drive pump 221
Pipeline and outlet tube road are respectively arranged with the second import flat valve 222 and second outlet flat valve 223 so that auxiliary pump 22 can only
Reversed resorption solution, prevents from flowing backwards.
Electromagnetic drive pump 221 shares electromagnet with second solenoid valve 224 by the way of integrated.When electromagnetic drive pump 221
When startup, second solenoid valve 224 is also turned on；When electromagnetic drive pump 221 stops, the open circuit simultaneously of second solenoid valve 224 is played
The effect of double insurance.In view of the synchronism of the two, it is possible to share electromagnet.Second solenoid valve 224 uses two two
Three-way electromagnetic valve structure.
The outlet tube road of first solenoid valve 41 is provided with the second damping hole 42 for being atomized urea liquid.Second damping
Hole 42, the first solenoid valve 41 are used to control the folding of atomizer using two-position two-way solenoid valve.It should be noted that in auxiliary pump
When 22 startup resorption, the first solenoid valve 41 need to first coordinate unlatching, turn off, and ensure at atomizer and residual solution can in pipeline
It is clean to be sucked.
Return line 11 is connect with the inlet pipe of the first solenoid valve 41, the connecting tube of accumulator 3 and the first solenoid valve 41
Road is provided with pressure sensor 6, and pressure sensor 6 is used for signal piping pressure.
When normal pumping urea liquid, main pump 21 starts, and auxiliary pump 22 stops, and urea liquid is from the outlet tube road of urea box 1
Pass through first filter 51, the first import flat valve 212, Electric-motor driven pumps 211, first outlet flat valve 213, the second mistake successively
Filter 52, accumulator 3 reach nozzle module 4, and a part is flowed out by the first damping hole 111 and returns to urea by outlet tube road 11
Case 1, another part is sprayed by the first solenoid valve 41 from atomizer, when without spraying, is controlled by the first solenoid valve 41 disconnected
Open pipe road.
When Liquid Residue in shut-down resorption pipeline, main pump 21 stops, and auxiliary pump 22 starts, while second solenoid valve 224 is connected,
First solenoid valve 41 is first opened, and after the Liquid Residue at nozzle to be atomized exhausts, the first solenoid valve 41 is closed, and is remained in system pipeline
Urea liquid since 4 position of nozzle module, by it is auxiliary pump 22 effect, start to take out, successively pass through accumulator 3, second filter
Device 52, the second import flat valve 222, electromagnetic drive pump 221, second outlet flat valve 223, first filter 51 are eventually returned to urinate
Plain case 1 realizes the resorption of system residual liquid.After effectively solving system residual urea liquid, easily crystallization, icing causes pipe
Road blocks, damages the problems such as system.
Urea pumping system described in the present embodiment is realized using no air-assisted structure by using two parallel pumps
When spraying urea liquid, main pump 21 starts, and urea liquid is aspirated from urea box 1, by Pipeline transport at nozzle module 4,
Urea liquid is measured by controlling the opening time of the first solenoid valve 41；AEI After End of Injection, auxiliary pump 22 will remain in system
The urea liquid resorption in portion solves the problems, such as urea crystals, blocking pipeline, and installed additional in return line 11 to urea box 1
First damping hole 111, not only pressure stability is high but also at low cost, noise is small.
Embodiment 2：
As shown in Fig. 2, the present embodiment and embodiment 1 main difference is that：Electromagnetic drive pump 221 and second solenoid valve
224 respectively drive, and respectively control.Rest part is identical as the structure of embodiment 1.
Embodiment 3：
As shown in figure 3, the present embodiment and embodiment 1 main difference is that：Return line 11 is set as connecting with accumulator 3
It connects, pressure sensor 6 is set on return line 11.Rest part is identical as the structure of embodiment 1.
The utility model is exemplarily described above in conjunction with attached drawing, it is clear that the utility model specific implementation not by
The limitation of aforesaid way, for those of ordinary skill in the art, according to the thought of the utility model, in specific implementation mode and
There will be changes in application range, the content of the present specification should not be construed as a limitation of the present invention.
Claims (9)
1. a kind of urea pumping system, including pass sequentially through the urea box of piping connection, urea pump module, accumulator and nozzle mould
Block, which is characterized in that the urea pump module include be arranged in parallel for by the liquid pumping in urea box to nozzle module
Main pump and for by the reversed auxiliary pump for aspirate back urea box of the liquid in pipeline, the nozzle module including the first solenoid valve with
Atomizer, first solenoid valve respectively by piping connection accumulator and atomizer, first solenoid valve with it is described
It is provided with the return line being connected to the urea box on pipeline between accumulator, the first resistance is offered on the return line
Buddhist nun hole.
2. urea pumping system according to claim 1, it is characterised in that：The both ends connecting line of the urea pump module
On be both provided with filter.
3. urea pumping system according to claim 1, it is characterised in that：The main pump includes Electric-motor driven pumps, described
Inlet pipe and the outlet tube road of Electric-motor driven pumps are respectively arranged with the first import flat valve and first outlet flat valve.
4. urea pumping system according to claim 1, it is characterised in that：The auxiliary pump includes that the electromagnetism being arranged in series drives
Inlet pipe and the outlet tube road of dynamic pump and second solenoid valve, the electromagnetic drive pump are respectively arranged with the second import flat valve
With second outlet flat valve.
5. urea pumping system according to claim 4, it is characterised in that：The electromagnetic drive pump and second electromagnetism
Valve is by sharing magnet control.
6. urea pumping system according to claim 4, it is characterised in that：The electromagnetic drive pump and second electromagnetism
Valve is separately controlled.
7. urea pumping system according to claim 1, it is characterised in that：The outlet tube road of first solenoid valve is set
It is equipped with the second damping hole for being atomized urea liquid.
8. urea pumping system according to claim 1, it is characterised in that：The return line connects with the accumulator
It connects, pressure sensor is additionally provided on the return line.
9. urea pumping system according to claim 1, it is characterised in that：The return line and first solenoid valve
Inlet pipe connection, be provided with pressure sensor on the connecting line of the accumulator and first solenoid valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720992677.7U CN207740067U (en) | 2017-08-09 | 2017-08-09 | A kind of urea pumping system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720992677.7U CN207740067U (en) | 2017-08-09 | 2017-08-09 | A kind of urea pumping system |
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| Publication Number | Publication Date |
|---|---|
| CN207740067U true CN207740067U (en) | 2018-08-17 |
Family
ID=63114731
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| CN201720992677.7U Active CN207740067U (en) | 2017-08-09 | 2017-08-09 | A kind of urea pumping system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107246302A (en) * | 2017-08-09 | 2017-10-13 | 华中科技大学无锡研究院 | A kind of urea pumping system |
| CN110792489A (en) * | 2019-11-22 | 2020-02-14 | 华中科技大学 | Urea solution supply system adopting pneumatic double-diaphragm pump |
| CN110985170A (en) * | 2019-12-18 | 2020-04-10 | 华中科技大学 | Non-air-assisted urea pump adopting novel reversing valve and application thereof |
| CN113090371A (en) * | 2021-05-06 | 2021-07-09 | 无锡威孚力达催化净化器有限责任公司 | Portable SCR system urea nozzle testing arrangement and system |
-
2017
- 2017-08-09 CN CN201720992677.7U patent/CN207740067U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107246302A (en) * | 2017-08-09 | 2017-10-13 | 华中科技大学无锡研究院 | A kind of urea pumping system |
| CN110792489A (en) * | 2019-11-22 | 2020-02-14 | 华中科技大学 | Urea solution supply system adopting pneumatic double-diaphragm pump |
| CN110792489B (en) * | 2019-11-22 | 2020-10-30 | 华中科技大学 | Urea solution supply system adopting pneumatic double-diaphragm pump |
| CN110985170A (en) * | 2019-12-18 | 2020-04-10 | 华中科技大学 | Non-air-assisted urea pump adopting novel reversing valve and application thereof |
| CN110985170B (en) * | 2019-12-18 | 2021-01-19 | 华中科技大学 | Non-gas-assisted urea pump and application thereof |
| CN113090371A (en) * | 2021-05-06 | 2021-07-09 | 无锡威孚力达催化净化器有限责任公司 | Portable SCR system urea nozzle testing arrangement and system |
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