CN208441908U - Nozzle is gentle to help formula SCR system - Google Patents
Nozzle is gentle to help formula SCR system Download PDFInfo
- Publication number
- CN208441908U CN208441908U CN201820954032.9U CN201820954032U CN208441908U CN 208441908 U CN208441908 U CN 208441908U CN 201820954032 U CN201820954032 U CN 201820954032U CN 208441908 U CN208441908 U CN 208441908U
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- Prior art keywords
- urea
- nozzle
- mixing chamber
- pressure
- chamber
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Exhaust Gas After Treatment (AREA)
- Nozzles (AREA)
Abstract
The utility model provides a kind of nozzle, including nozzle body and admission gear, nozzle body has urea liquid entrance and urea jet port, pressure chamber and mixing chamber are provided on nozzle body, the import of pressure chamber is connected to urea liquid entrance, the outlet of mixing chamber is connected to urea jet port, and the outlet of pressure chamber and the urea import of mixing chamber are connected by pressure maintaining valve；Admission gear has compressed air inlet, for being passed through compressed air into mixing chamber.Mixing chamber is integrated on nozzle by the utility model, mixing chamber and nozzle are connected directly, eliminate the distance between mixing chamber and nozzle, without intermediate pressure solenoid, so can be avoided the influence of length of pipe and caliber to urea injection transient response between mixing chamber and nozzle, urea injection transient response is improved, while eliminating urea length of tube and caliber to the matched influence of vehicle, improves versatility.The utility model additionally provides a kind of gas with said nozzle and helps formula SCR system.
Description
Technical field
The utility model relates to technical fields, and more specifically to a kind of nozzle, the utility model further relates to a kind of gas
Help formula SCR system.
Background technique
SCR (abbreviation of Selective Catalytic Reduction, selective catalytic reduction) technology, utilizes urea
Solution handles the nitrogen oxides in diesel engine vent gas, is to eliminate diesel oil to reduce the nitrogen oxides in diesel engine vent gas
One of the main aftertreatment technologies of machine nox in exhaust.
In the SCR system course of work, need the urea injection unit by being mounted on exhaust pipe that quantitative urea is water-soluble
Liquid is sprayed into exhaust pipe with mist form.
Urea injection unit mainly helps formula urea pump and nozzle to constitute by gas, and existing pressure chamber and mixing chamber are arranged in
Gas helps inside formula urea pump.It is connected between mixing chamber and nozzle in urea pump by pressure pipe.Urea metering method is pressure
After the completion of foundation, metering urea injecting quantity is controlled by motor speed.The arrangement determine pressure pipe pipeline length and
The thickness of caliber will affect the transient response of urea injection.
The length and caliber for limiting pressure pipe can stablize injection transient response, and pressure pipe is influenced its length by vehicle matching
1-4 meters are differed, and still, different length is different with the pressure pipe urea injection transient response of caliber, and responsiveness difference is easier to lead
Deterioration of emission is caused, client is seriously constrained and matches demand, versatility is poor, also results in work at double to engine data calibration
Amount.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of nozzle, to avoid the pipe between mixing chamber and nozzle
The influence of road length and caliber to urea injection transient response, improves versatility.
The another object of the utility model is to provide a kind of gas with said nozzle and helps formula SCR system, to avoid mixed
The influence of length of pipe and caliber to urea injection transient response between chamber and nozzle is closed, versatility is improved.
In order to achieve the above object, the utility model provides the following technical solutions:
A kind of nozzle, comprising:
Nozzle body with urea liquid entrance and urea jet port is provided with pressure chamber and mixed on the nozzle body
Chamber is closed, the import of the pressure chamber is connected to the urea liquid entrance, the outlet of the mixing chamber and the urea jet port
Connection, and the outlet of the pressure chamber is connect with the urea import of the mixing chamber by pressure maintaining valve；
For being passed through the admission gear of compressed air into the mixing chamber, the admission gear enters with compressed air
Mouthful.
Preferably, in said nozzle, the mixing gas outlet of the admission gear and the air inlet of the mixing chamber pass through the
The connection of one check valve.
Preferably, in said nozzle, the admission gear is additionally provided with the urea reflux being connected to the pressure chamber and blows
Mouthful, the urea reflux inflatable mouth is connect with the pressure chamber by second one-way valve.
Preferably, it in said nozzle, is provided with to allow hand in the admission gear and opens first check valve and institute
State the control valve of second one-way valve.
Preferably, in said nozzle, the control valve is two-position three way magnetic valve.
It preferably, further include the pressure sensor being arranged in the mixing chamber in said nozzle.
Preferably, in said nozzle, the first engaging lug is provided on the nozzle body；It is provided in the admission gear
Second engaging lug, second engaging lug are detachably connected with first engaging lug by bolt.
It can be seen from the above technical scheme that nozzle provided by the utility model includes nozzle body and admission gear,
Wherein, nozzle body has urea liquid entrance and urea jet port, is provided with pressure chamber and mixing chamber, pressure on nozzle body
The import of chamber is connected to urea liquid entrance, and the outlet of mixing chamber is connected to urea jet port, and the outlet of pressure chamber with mix
The urea import of chamber is connected by pressure maintaining valve；Admission gear has pressure for being passed through compressed air, admission gear into mixing chamber
Contracting air intake.
It should be noted that foundation of the pressure chamber for realizing urea injection pressure；Pressure maintaining valve is used for the pressure of pressure chamber
Stablize；Mixing chamber is for realizing gas-liquid mixed.
It is connected in application, the urea liquid of the urea liquid entrance of nozzle body and urea pump is exported, in this way, urea pump
Urea liquid only can enter pressure chamber from urea liquid entrance；When there is injection demand, extra urea, that is, demand urea
Enter mixing chamber by pressure maintaining valve, meanwhile, admission gear is passed through compressed air into mixing chamber from compressed air inlet, thus real
Gas-liquid mixed in existing mixing chamber is then sprayed the urea of needs by the urea jet port of nozzle body.
Mixing chamber is integrated on nozzle by the utility model, and mixing chamber and nozzle are connected directly, and eliminates mixing chamber and spray
The distance between mouth, without intermediate pressure solenoid, so can be avoided the length of pipe and caliber between mixing chamber and nozzle
Influence to urea injection transient response improves urea injection transient response, while eliminating urea length of tube and pipe
Diameter improves versatility to the matched influence of vehicle.
The utility model is applicable to all vehicle matching applications, and it is far-reaching to generate economic benefit.
The utility model additionally provides a kind of gas and helps formula SCR system, including urea pump and the spray connecting with the urea pump
Mouth, the nozzle are any of the above-described kind of nozzle, and since said nozzle has said effect, the gas with said nozzle helps formula SCR
System has same effect, and therefore, this article will not repeat them here.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is this
Some embodiments of utility model, for those of ordinary skill in the art, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is the structural schematic diagram of nozzle provided by the embodiment of the utility model；
Fig. 2 is the cross-sectional view of nozzle provided by the embodiment of the utility model.
Specific embodiment
The utility model embodiment provides a kind of nozzle, avoids length of pipe and caliber between mixing chamber and nozzle
Influence to urea injection transient response, improves versatility.
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
Please referring to attached drawing 1-2, nozzle provided by the embodiment of the utility model includes nozzle body 1 and admission gear 2,
In, nozzle body 1 has urea liquid entrance 12 and urea jet port 13, is provided with pressure chamber A and mixing chamber on nozzle body 1
The import of B, pressure chamber A are connected to urea liquid entrance 12, and the outlet of mixing chamber B is connected to urea jet port 13, and pressure chamber A
Outlet and the urea import of mixing chamber B connect by pressure maintaining valve 4；Admission gear 2 is empty for being passed through compression into mixing chamber B
Gas, admission gear 2 have compressed air inlet 22.
It should be noted that foundation of the pressure chamber A for realizing urea injection pressure；Pressure maintaining valve 4 is used for the pressure of pressure chamber A
Power is stablized；Mixing chamber B is for realizing gas-liquid mixed.
It is connected in application, the urea liquid of the urea liquid entrance 12 of nozzle body 1 and urea pump is exported, in this way, urine
The urea liquid of element pump only can enter pressure chamber A from urea liquid entrance 12；When there is injection demand, extra urea, that is, demand
Urea by pressure maintaining valve 4 enter mixing chamber B, meanwhile, admission gear 2 is passed through pressure into mixing chamber B from compressed air inlet 22
Contracting air, to realize the gas-liquid mixed in mixing chamber B, then by the urea jet port 13 of nozzle body 1 by the urea of needs
It sprays.
Mixing chamber B is integrated on nozzle by the utility model, and mixing chamber B and nozzle are connected directly, eliminate mixing chamber B with
The distance between nozzle, without intermediate pressure solenoid, so can be avoided the length of pipe and pipe between mixing chamber B and nozzle
Diameter to urea injection transient response influence, improve urea injection transient response, while eliminate urea length of tube and
Caliber improves versatility to the matched influence of vehicle.
The utility model is applicable to all vehicle matching applications, and it is far-reaching to generate economic benefit.
Preferably, the mixing gas outlet of admission gear 2 is connect with the air inlet of mixing chamber B by the first check valve 5.This
One check valve 5 can only enter compressed air inside mixing chamber B, and the urea inside mixing chamber B cannot be redirected back into air inlet machine
Inside structure 2, functional reliability is improved.The utility model can also be same to realize by the door-plate in setting mixing chamber B
Opening when being passed through compressed air avoids the effect of urea reflux when not being passed through air.
Admission gear 2 is additionally provided with the urea reflux inflatable mouth being connected to pressure chamber A, urea reflux for operating easily,
Inflatable mouth is connect with pressure chamber A by second one-way valve 3.
When engine is shut down, the utility model can make compressed air be directly entered pressure chamber A by urea reflux inflatable mouth,
Facilitate and all urea (urea i.e. inside pipeline and pump) before pressure chamber A are purged into urine using the compressed air at nozzle
In plain case.Being compared than suck-back with the mode of residual urea inside only purging urea pump by way of compressed air purging, urea
It flows back more thorough, pump and pipeline are substantially without residual urea.
The second one-way valve 3 control compressed air can only enter pressure chamber A, avoid urea reflux in pressure chamber A into
Inside mechanism of qi structure 2, functional reliability is improved.The utility model can also be by the door-plate that is arranged in pressure chamber A, to realize
Opening when being similarly passed through compressed air, avoids the effect of urea reflux when not being passed through air.
In further technical solution, it is provided in admission gear 2 and allows hand over the first check valve of opening 5 and second unidirectionally
The control valve of valve 3.Control valve is used to control the direction of gas circuit, realizes the switching of the injection of urea gas-liquid mixed and urea reflux, into
One step simplifies operation.The utility model can also be not provided with the control valve, by the opening and closing for artificially controlling two check valves.
In order to facilitate control, control valve is two-position three way magnetic valve 7.The utility model passes through two-position three way magnetic valve 7 certainly
Move to the first check valve 5 and second one-way valve 3 are opened in switching, are realized in the injection of urea gas-liquid mixed or purging urea pipe
Residual urea, control precision it is higher.Certainly, above-mentioned control valve can also use pneumatic control or Mechanical course, this is practical
It is novel to be not specifically limited herein.
Preferably, nozzle further includes the pressure sensor 6 being arranged in mixing chamber B.Pressure sensor 6 is for detecting mixing
Whether the pressure of chamber B, diagnosis nozzle block, and improve functional reliability.
For the ease of the dismounting of admission gear 2, the first engaging lug 11 is provided on nozzle body 1；It is arranged in admission gear 2
There is the second engaging lug 21, the second engaging lug 21 is detachably connected with the first engaging lug 11 by bolt.Specifically, as shown in Figure 1,
First engaging lug 11 and the second engaging lug 21 are two, are corresponded respectively, and the utility model passes through engaging lug and bolt
Cooperation, admission gear 2 is fixed on nozzle body 1, relatively simple for structure.Certainly, above-mentioned admission gear 2 can also use it
His mode is fixed on nozzle body 1, such as the mode of clamp.
Since nozzle is installed on high-temperature exhaust pipe, pressure maintaining valve 4, check valve, 6 operating temperature of pressure sensor are more than
150 DEG C, which is all satisfied hot operation requirement, it is ensured that nozzle.Pressure chamber A and mixing chamber B can if necessary
Double thermal insulation introduces cooling water increase cooling.
The course of work of nozzle provided by the embodiment of the utility model is as follows:
After engine ignition switch is opened, pump starts to initialize self-test.
After the completion of self-test fault-free, stop state automatically into pump.
After reaching certain condition, such as water temperature, revolving speed, row's temperature setting value, start to build pressure.At this point, pressure chamber A filling is full
Urea, pressure are setting range value.After pressure chamber A reaches the pressure value of setting, the motor drop of the pumping urea inside urea pump
The slow-speed of revolution is until stop, it is ensured that the pressure value of steady pressure chamber A.
Air valve is opened.After the completion of pressure is established, two-position three way magnetic valve 7 is in position 1, i.e. compressed air is from compressed air
Entrance 22 enters mixing chamber B by the first check valve 5.Enter spray regime after mixing chamber B pressure reaches setting value.Because at this time
Motor without injection demand, the amount of injection 0, urea pump inside pumping urea is substantially at 0 revolving speed.
Spray regime.Reach the parameter requirements of setting, such as speed setting value, the amount of injection demand, outlet air temperature set value
After parameter, urea pump motor internal executes corresponding revolving speed, the corresponding urea injecting quantity of revolving speed according to urea injecting quantity demand.
Because pressure chamber A internal pressure is close with its internal pressure maintaining valve 4.When there is injection demand, extra urea, that is, demand urea
Enter mixing chamber B by pressure maintaining valve 4, is sprayed the urea of needs by urea jet port 13 after completing gas-liquid mixed.
Purging state.Conditions enter when engine ignition switch is closed etc..Motor reversal at this time.Into purging state when,
Three two-way electromagnetic valves are in position 2, i.e. compressed air enters pressure chamber A by second one-way valve 3 from compressed air inlet 22,
The urea of channel interior is all purged into inside urea box by the urea of remaining by suck-back and air purging.
The utility model embodiment additionally provides a kind of gas and helps formula SCR system, connect including urea pump and with urea pump
Nozzle, the nozzle are the nozzle that any of the above-described embodiment provides, and avoid the length of pipe and pipe between mixing chamber B and nozzle
Influence of the diameter to urea injection transient response, improves versatility, its advantage is that specifically being please referred to by nozzle bring
Relevant part in embodiment is stated, details are not described herein again.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (8)
1. a kind of nozzle characterized by comprising
Nozzle body (1) with urea liquid entrance (12) and urea jet port (13) is provided on the nozzle body (1)
Pressure chamber (A) and mixing chamber (B), the import of the pressure chamber (A) are connected to the urea liquid entrance (12), the mixing chamber
(B) outlet is connected to the urea jet port (13), and the urea of the outlet of the pressure chamber (A) and the mixing chamber (B)
Import is connected by pressure maintaining valve (4)；
For being passed through the admission gear (2) of compressed air into the mixing chamber (B), the admission gear (2) has compression empty
Gas entrance (22).
2. nozzle according to claim 1, which is characterized in that mixed with described the mixing gas outlet of the admission gear (2)
The air inlet for closing chamber (B) is connected by the first check valve (5).
3. nozzle according to claim 2, which is characterized in that the admission gear (2) is additionally provided with and the pressure chamber
(A) the urea reflux inflatable mouth being connected to, the urea reflux inflatable mouth and the pressure chamber (A) are connected by second one-way valve (3)
It connects.
4. nozzle according to claim 3, which is characterized in that be provided on the admission gear (2) and allow hand over opening
The control valve of first check valve (5) and the second one-way valve (3).
5. nozzle according to claim 4, which is characterized in that the control valve is two-position three way magnetic valve (7).
6. nozzle according to claim 1, which is characterized in that further include that the pressure being arranged in the mixing chamber (B) passes
Sensor (6).
7. nozzle according to claim 1-6, which is characterized in that be provided with first on the nozzle body (1)
Engaging lug (11)；It is provided with the second engaging lug (21) on the admission gear (2), second engaging lug (21) and described first
Engaging lug (11) is detachably connected by bolt.
8. a kind of gas helps formula SCR system, including urea pump and the nozzle being connect with the urea pump, which is characterized in that the spray
Mouth is such as the described in any item nozzles of claim 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820954032.9U CN208441908U (en) | 2018-06-20 | 2018-06-20 | Nozzle is gentle to help formula SCR system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820954032.9U CN208441908U (en) | 2018-06-20 | 2018-06-20 | Nozzle is gentle to help formula SCR system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208441908U true CN208441908U (en) | 2019-01-29 |
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ID=65089504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820954032.9U Active CN208441908U (en) | 2018-06-20 | 2018-06-20 | Nozzle is gentle to help formula SCR system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208441908U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900683A (en) * | 2019-03-26 | 2019-06-18 | 攀钢集团攀枝花钢铁研究院有限公司 | The online internal standard hybrid system of Element detection |
| CN113090363A (en) * | 2021-04-27 | 2021-07-09 | 广西卡迪亚科技有限公司 | SCR urea supersonic speed jet atomization injection assembly |
-
2018
- 2018-06-20 CN CN201820954032.9U patent/CN208441908U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109900683A (en) * | 2019-03-26 | 2019-06-18 | 攀钢集团攀枝花钢铁研究院有限公司 | The online internal standard hybrid system of Element detection |
| CN113090363A (en) * | 2021-04-27 | 2021-07-09 | 广西卡迪亚科技有限公司 | SCR urea supersonic speed jet atomization injection assembly |
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