CN207554161U - A kind of two-fluid urea nozzle with big jet angle - Google Patents
A kind of two-fluid urea nozzle with big jet angle Download PDFInfo
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- CN207554161U CN207554161U CN201721432251.2U CN201721432251U CN207554161U CN 207554161 U CN207554161 U CN 207554161U CN 201721432251 U CN201721432251 U CN 201721432251U CN 207554161 U CN207554161 U CN 207554161U
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- air
- nozzle
- urea
- drainage tube
- conduction pipe
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Abstract
The utility model is related to a kind of two-fluid urea nozzles with big jet angle,Including air conduction pipe,Urea drainage tube,Heat shield,Nozzle body and nozzle core,Heat shield is enclosed cylindrical conducting space,Nozzle body is set on the lower right corner in conducting space,Nozzle body is horizontal by 30 75 degree of angles,Nozzle body includes the nozzle core for being located therein the heart and the ring-shaped distributed air spray chamber centered on nozzle core,Air conduction pipe and urea drainage tube are connected by the effect of positioning pin and locating piece with heat shield,The end of air conduction pipe is inserted into conducting space,Urea drainage tube is L-shaped,It tilts to narrow across end behind conducting space is connected with nozzle core,Air spray chamber includes the air introduction segment along the nozzle distribution of direction extension from inside to outside,Air caches section and air injection section,Air injection section is tilted towards nozzle core direction,And the angle α between the extension line of air injection section is more than or equal to 90 ° and is less than 180 °.
Description
Technical field
The utility model is related to a kind of two-fluid urea nozzle more particularly to a kind of two-fluid urea with big jet angle
Nozzle.
Background technology
Main pollutant is NOx in diesel engine vent gas, for diesel engine automobile is caused to reach national emission regulation demands, I
The main technological route of state is exactly selective catalytic reduction (SCR), by the use of urea liquid as reducing agent in SCR aftertreatment system
The nitrogen oxides in diesel engine vent gas is removed, so as to reach the requirement of the corresponding emission regulation of country.The work of the system is former
Reason is：Tail gas enters exhaust pipe, and urea nozzle is equipped on exhaust pipe, sprays into urea for vehicle solution, and urea is sent out at high temperature
Generate ammonia after unboiled water solution and pyrolytic reaction, inside catalyst converter, reduction reaction occurs for ammonia and nitrogen oxides, generation nitrogen and
Water, so as to have the function that cleaning of off-gas.
Chinese patent application CN106870073A discloses a kind of two-fluid urea nozzle, including nozzle body, nozzle housing
The top of body is connected with airflow duct, urea diversion pipe, and nozzle body is cylinder, and nozzle body lower end side is equipped with injection
Face, jet face are in half elliptic, spray towards nozzle body internal stretch and form ejector block, and nozzle body is internally provided with cavity,
The angle of cavity connection airflow duct, ejector block and horizontal plane is 30-75 degree, and connection urea diversion pipe in ejector block center is urinated
To ejector block center, urea diversion pipe extends to jet face and forms urea liquid outlet plain diversion pipe arc-shaped transition, and ejector block exists
The periphery of urea diversion pipe forms air ring cavity, and air ring cavity includes air introduction segment, air caching section, air injection section, empty
Gas introduction segment is arranged at air ring cavity edge, air introduction segment end connection air caching section, air caching section connection air
Jet segment, air injection section extend to jet face and form air outlet slit.
Above-mentioned urea nozzle has the function of good prevention urea crystals, but has the disadvantage that, due to the gas of nozzle
The gas flow rate of outlet has reached 260m/s or so, and high air velocity so that the atomization cone angle of jet expansion is smaller, 20
Degree left and right, therefore it is unfavorable for being sufficiently mixed for urea droplet and tail gas after atomization.
Utility model content
The utility model provides a kind of double with big jet angle for deficiency existing for existing two-fluid urea nozzle
Liquid urea nozzle.
The technical solution that the utility model solves above-mentioned technical problem is as follows：
A kind of two-fluid urea nozzle with big jet angle, including air conduction pipe, urea drainage tube, heat shield, spray
Mouth body and nozzle core, the heat shield are enclosed cylindrical conducting space, and the nozzle body is set on the bottom right in conducting space
Angle, horizontal by 30-75 degree angles, the nozzle body includes being located therein the nozzle core of the heart and using nozzle core in nozzle body
The ring-shaped distributed air spray chamber of the heart, the air conduction pipe and urea drainage tube by the effect of positioning pin and locating piece with every
Heat cover is connected, and the end of the air conduction pipe is inserted into conducting space, and the urea drainage tube is L-shaped, passes through and leads
End tilts to narrow and be connected with nozzle core behind logical space, and the air spray chamber is included along the nozzle distribution of direction extension from inside to outside
Air introduction segment, air caching section and air injection section, the air injection section is tilted towards nozzle core direction, and air
Angle α between the extension line of jet segment is more than or equal to 90 ° and is less than 180 °.
Based on the above technical solution, the utility model can also do following improvement.
Further, the angle α between the extension line of air injection section is 100 °.
Further, the air conduction pipe is connected by pneumatic fitting with fast twist-on head, the urea drainage tube connection
There is quick connector.
The beneficial effects of the utility model are：
By changing the structure of nozzle in itself so that the atomization cone angle of nozzle expands several times, increases urea and tail gas
Contact area, and then improve the efficiency of catalyzed conversion.
Description of the drawings
Fig. 1 is the cross-sectional view of urea nozzle provided by the utility model；
Fig. 2 is the schematic enlarged-scale view of part A in Fig. 1；
In Fig. 1 and Fig. 2,1, air conduction pipe；2nd, urea drainage tube；3rd, heat shield；4th, nozzle body；5th, nozzle core；6th, it leads
Logical space；7th, air spray chamber；7-1, air introduction segment；7-2, air caching section；7-3, air injection section；8th, positioning pin；9th, it is fixed
Position block；10th, pneumatic fitting；11st, fast twist-on head；12nd, quick connector
Specific embodiment
The principle and feature of the utility model are described below in conjunction with example, example is served only for explaining this practicality
It is novel, it is not intended to limit the scope of the utility model.
A kind of two-fluid urea nozzle with big jet angle, as shown in Figure 1 and Figure 2, draws including air conduction pipe 1, urea
Flow tube 2, heat shield 3, nozzle body 4 and nozzle core 5, heat shield are enclosed cylindrical conducting space 6, and nozzle body is set on conducting
The lower right corner in space, horizontal by 30-75 degree angles, nozzle body includes the nozzle core 5 for being located therein the heart and with spray nozzle body
Ring-shaped distributed air spray chamber 7, air conduction pipe and urea drainage tube pass through positioning pin 8 and locating piece 9 centered on mouth core
Effect is connected with heat shield, and the end of air conduction pipe is inserted into conducting space, and urea drainage tube is L-shaped, passes through and leads
End tilts to narrow and be connected with nozzle core behind logical space, and air spray chamber includes the sky along the nozzle distribution of direction extension from inside to outside
Gas introduction segment 7-1, air caching section 7-2 and air injection section 7-3, air injection section tilt, and empty towards nozzle core direction
Angle α between the extension line of gas jet section is more than or equal to 90 ° and is less than 180 °.
Further, air conduction pipe is connected by pneumatic fitting 10 with fast twist-on head 11, and urea drainage tube is connected with soon
Connection-peg 12.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all in this practicality
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (3)
1. a kind of two-fluid urea nozzle with big jet angle, including air conduction pipe, urea drainage tube, heat shield, nozzle
Body and nozzle core, the heat shield are enclosed cylindrical conducting space, and the nozzle body is set on the lower right corner in conducting space,
Horizontal by 30-75 degree angles, the nozzle body includes being located therein the nozzle core of the heart and centered on nozzle core nozzle body
Ring-shaped distributed air spray chamber, the air conduction pipe and urea drainage tube by the effect of positioning pin and locating piece with it is heat-insulated
Cover is connected, and the end of the air conduction pipe is inserted into conducting space, and the urea drainage tube is L-shaped, passes through conducting
End tilts to narrow and be connected with nozzle core behind space, which is characterized in that the air spray chamber includes square from inside to outside along nozzle
Air introduction segment, air caching section and air injection section, the air injection section to extension distribution incline towards nozzle core direction
Tiltedly, the angle α and between the extension line of air injection section is more than or equal to 90 ° and is less than 180 °.
2. two-fluid urea nozzle according to claim 1, which is characterized in that the folder between the extension line of air injection section
Angle α is 100 °.
3. two-fluid urea nozzle according to claim 1 or 2, which is characterized in that the air conduction pipe passes through air
Connector is connected with fast twist-on head, and the urea drainage tube is connected with quick connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721432251.2U CN207554161U (en) | 2017-10-31 | 2017-10-31 | A kind of two-fluid urea nozzle with big jet angle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721432251.2U CN207554161U (en) | 2017-10-31 | 2017-10-31 | A kind of two-fluid urea nozzle with big jet angle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207554161U true CN207554161U (en) | 2018-06-29 |
Family
ID=62681744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721432251.2U Active CN207554161U (en) | 2017-10-31 | 2017-10-31 | A kind of two-fluid urea nozzle with big jet angle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207554161U (en) |
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2017
- 2017-10-31 CN CN201721432251.2U patent/CN207554161U/en active Active
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