CN207245811U - A kind of urea pump system without suck-back - Google Patents
A kind of urea pump system without suck-back Download PDFInfo
- Publication number
- CN207245811U CN207245811U CN201721122041.3U CN201721122041U CN207245811U CN 207245811 U CN207245811 U CN 207245811U CN 201721122041 U CN201721122041 U CN 201721122041U CN 207245811 U CN207245811 U CN 207245811U
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- CN
- China
- Prior art keywords
- urea
- suck
- liquid
- urea pump
- pump unit
- 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
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Abstract
A kind of urea pump system without suck-back, including：Urea box, inlet, filter, urea pump unit, relief valve, liquid return hole, liquid outlet, elastic urea tube, urea nozzle system, described urea box one end connects inlet, one end connects liquid return hole, the inlet is linked in sequence filter, urea pump unit, the urea pump unit connects relief valve, the relief valve connects liquid return hole, and urea liquid passes back into urea box by liquid return hole；It is characterized in that：The urea pump unit is connected with liquid outlet, and the liquid outlet is connected with elastic urea tube, and the elasticity urea tube is connected with urea nozzle system, and urea liquid enters urea nozzle system by liquid outlet, elastic urea tube, is sprayed from nozzle.The utility model urea pump system reduces the function component such as reversal valve, reduces cost without suck-back function, simple in structure.
Description
Technical field
Diesel engine of vehicle vent gas treatment urea pump system is the utility model is related to, for giving motor exhaust after-treatment system
Urea is provided, reduces emission of nitrogen oxide.
Background technology
At present, as country is more and more stringenter to environmental requirement, have there is obvious chemical fumes type in a small number of big cities
（That is motor-vehicle tail-gas type）Atmosphere pollution, therefore, the research of exhaust emissions of diesel engine pollution control technology and its important and compel
In the eyebrows and eyelashes.
The basic principle of SCR post-processing technologies is that fuel oil is sprayed into I. C. engine exhaust or in addition adds reducing agent, profit
Promote reducing agent that chemical reaction generation nitrogen occurs with nitrogen oxides with suitable catalyst（N2）.Automobile urea system is mainly used
In reducing the nitrogen oxides pollution in exhaust gas from diesel vehicle, free of contamination nitrogen and vapor are generated.It is auxiliary without air at home at present
The urea pump system helped all functions containing suck-back, suck-back function prevent urea crystallographic expansion at low temperature, cause urea pump system
System component damages under the bulbs of pressure.However, the urea pump system of the function containing suck-back needs the function component such as reversal valve, into
This height, it is complicated.
The content of the invention
The purpose of the utility model is to overcome the deficiencies in the prior art, there is provided a kind of urea simple in structure, cost is low
Pump；
In order to solve prior art problem, technical solution is as follows used by the utility model：
A kind of urea pump system without suck-back, including：Urea box, inlet, filter, urea pump unit, relief valve,
Liquid return hole, liquid outlet, elastic urea tube, urea nozzle system, described urea box one end connect inlet, and one end connects back to liquid
Mouthful, the inlet is linked in sequence filter, urea pump unit, and the urea pump unit connects relief valve, and the relief valve connects
Liquid return hole is connect, urea liquid passes back into urea box by liquid return hole；It is characterized in that：The urea pump unit and liquid outlet phase
Even, the liquid outlet is connected with elastic urea tube, and the elasticity urea tube is connected with urea nozzle system, and urea liquid passes through
Liquid outlet, elastic urea tube enter urea nozzle system, are sprayed from nozzle.The utility model urea pump system without suck-back function,
Reduce the function component such as reversal valve, reduce cost, it is simple in structure.
Preferably, the elastic urea tube is resistant to urea corrosion material.
Preferably, the resistant to urea corrosion material corrodes elastomeric material for resistant to urea or resistant to urea corrodes plastic material.
Preferably, pressure sensor is set between the urea pump unit and liquid outlet.
Preferably, set up defences in the urea pump unit and freeze air bag.The antifreeze air bag can play the role of it is freeze proof, can also play
The pressure effect of systems stabilisation.
Preferably, the antifreeze air bag is elastomeric material.The rubber part of capsule can be compressed and deformed under stress,
Antifreeze effect is played, other components of protection urea pump will not be freezing at low temperature.
Preferably, the antifreeze air bag is capsule shape, and capsule is built into air, and end sets stainless steel nut, with air
Plug is connected, and realizes sealing.
The technique effect that the utility model is brought：
1st, processing and manufacture cost can be saved without reversal valve；
2nd, will not produce causes nozzle stuck or fails in the carbon particle inlet nozzle by tail gas during suck-back；
3rd, since no suck-back, urea are filled in pipe, it is possible to reduce the time of urea pump work during vehicle launch；
4th, increase is with the freeze proof urea tube with spring function.
The advantage of the utility model is：
1st, the urea pump system without suck-back function, using elastic urea tube, can absorb the urea under frost
Crystallographic expansion volume, will not damage urea pump prototype part, this system is not due to having suck-back function, without reversal valve, can reduce into
This, while can meet actual demand.The urea pump system without air auxiliary of existing technology has suck-back function, material cost
And manufacture the defects of of high cost；
2nd, system structure is simple, small, and cost is low.Suitable for the urea pump system of various tail gas treatment system of diesel engine
System.
Brief description of the drawings
Fig. 1 is a kind of urea pump structure diagram without suck-back of the utility model；
Fig. 2 is the antifreeze air bag schematic perspective view of the utility model embodiment 2；
Fig. 3 is the antifreeze air bag diagrammatic cross-section of the utility model embodiment 2；
1 urea box, 2 inlets, 3 filters, 4 urea pump units, 5 pressure sensors, 6 relief valves, 7 liquid return holes, 8 in figure
Liquid outlet, 9 elastic urea tubes, 10 urea nozzle systems, 11 nozzles, 12 antifreeze air bags, the anti-frozen capsules of 12a, 12b air plugs.
Embodiment
The utility model is further described with reference to embodiment.Wherein, being given for example only property of attached drawing
Illustrate, expression is only schematic diagram, rather than pictorial diagram, it is impossible to is interpreted as the limitation to this patent；In order to which this reality is better described
With new embodiment, some components of attached drawing have omission, zoom in or out, and do not represent the size of actual product；To ability
For field technique personnel, some known features and its explanation may be omitted and will be understood by attached drawing.
Embodiment 1
A kind of urea pump system without suck-back, including：Urea box 1, inlet 2, filter 3, urea pump unit 4, let out
Pressure valve 6, liquid return hole 7, liquid outlet 8, elastic urea tube 9, urea nozzle system 10, described 1 one end of urea box connect inlet 2,
One end connects liquid return hole 7, and the inlet 2 is linked in sequence filter 3, urea pump unit 4, and the connection of urea pump unit 4 is let out
Pressure valve 6, the relief valve 6 connect liquid return hole 7, and urea liquid passes back into urea box 1 by liquid return hole 7；It is characterized in that：It is described
Urea pump unit 4 is connected with liquid outlet 8, and the liquid outlet 8 is connected with elastic urea tube 9, and the elasticity urea tube 9 is sprayed with urea
Mouth system 10 is connected, and urea liquid enters urea nozzle system 10 by liquid outlet 8, elastic urea tube 9, is sprayed from nozzle 11
Go out.
Embodiment 2
On the basis of embodiment 1, set up defences in the urea pump unit and freeze air bag 12.The antifreeze air bag is rubber material
Material, is capsule shape, and anti-frozen capsule 12a capsules are built into air, and end sets stainless steel nut, are connected with air plug 12b,
Realize sealing.The rubber part of the antifreeze air bag capsule can be compressed and deformed under stress, play antifreeze effect, protection
Urea pump and other components will not be freezing at low temperature.
Obviously, above-described embodiment is only intended to clearly illustrate the technical solution of the utility model example, and simultaneously
Non- is the restriction to the embodiment of the utility model.Other various forms of changes can also be made on the basis of the above description
Change or change.All any modification, equivalent and improvement made where within the spirit and principles of the present invention etc., should all wrap
It is contained in the scope of the utility model.
Claims (7)
1. a kind of urea pump system without suck-back, including：Urea box, inlet, filter, urea pump unit, relief valve, return
Liquid mouth, liquid outlet, elastic urea tube, urea nozzle system, described urea box one end connect inlet, and one end connects liquid return hole,
The inlet is linked in sequence filter, urea pump unit, and the urea pump unit connects relief valve, and the relief valve connects back to
Liquid mouth, urea liquid pass back into urea box by liquid return hole；It is characterized in that：The urea pump unit is connected with liquid outlet, institute
State liquid outlet with elastic urea tube to be connected, the elasticity urea tube is connected with urea nozzle system, and urea liquid is by going out liquid
Mouth, elastic urea tube enter urea nozzle system, are sprayed from nozzle.
A kind of 2. urea pump system without suck-back as claimed in claim 1, it is characterised in that：The elasticity urea tube is resistance to
Urea corrosion material.
A kind of 3. urea pump system without suck-back as claimed in claim 2, it is characterised in that：The resistant to urea corrosion material
Corrode elastomeric material for resistant to urea or resistant to urea corrodes plastic material.
A kind of 4. urea pump system without suck-back as claimed in claim 1, it is characterised in that：The urea pump unit is with going out
Pressure sensor is set between liquid mouth.
A kind of 5. urea pump system without suck-back as described in claim 1 or 4, it is characterised in that：The urea pump unit
Inside set up defences and freeze air bag.
A kind of 6. urea pump system without suck-back as claimed in claim 5, it is characterised in that：The antifreeze air bag is rubber
Material.
A kind of 7. urea pump system without suck-back as claimed in claim 6, it is characterised in that：The antifreeze air bag is capsule
Shape；The antifreeze air bag is built into air, and end sets stainless steel nut, is connected with air plug, realizes sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721122041.3U CN207245811U (en) | 2017-09-04 | 2017-09-04 | A kind of urea pump system without suck-back |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721122041.3U CN207245811U (en) | 2017-09-04 | 2017-09-04 | A kind of urea pump system without suck-back |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207245811U true CN207245811U (en) | 2018-04-17 |
Family
ID=61884222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721122041.3U Expired - Fee Related CN207245811U (en) | 2017-09-04 | 2017-09-04 | A kind of urea pump system without suck-back |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207245811U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153495A (en) * | 2020-01-07 | 2021-07-23 | 纬湃汽车电子(芜湖)有限公司 | Urea supply device, selective catalytic reduction system and vehicle |
-
2017
- 2017-09-04 CN CN201721122041.3U patent/CN207245811U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153495A (en) * | 2020-01-07 | 2021-07-23 | 纬湃汽车电子(芜湖)有限公司 | Urea supply device, selective catalytic reduction system and vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180417 Termination date: 20200904 |