CN208089388U - A kind of injection of exhaust aftertreatment urea and mixed structure - Google Patents
A kind of injection of exhaust aftertreatment urea and mixed structure Download PDFInfo
- Publication number
- CN208089388U CN208089388U CN201820590490.9U CN201820590490U CN208089388U CN 208089388 U CN208089388 U CN 208089388U CN 201820590490 U CN201820590490 U CN 201820590490U CN 208089388 U CN208089388 U CN 208089388U
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- Prior art keywords
- urea
- mixer
- exhaust pipe
- nozzle
- wall
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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
- 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)
Abstract
The utility model is related to exhaust system technical fields, more particularly to a kind of exhaust aftertreatment urea sprays and mixed structure, nozzle carrier including exhaust pipe, for connecting urea nozzle, it is fixed with mixer on the inner wall of the exhaust pipe, the mixer is arc-shaped structure and its circular arc side wall is connected with the inner wall of institute exhaust pipe；The mixer is evenly distributed with several flow-disturbing holes.The utility model makes tail gas by becoming flow-disturbing by parallel airflow after mixer by the way that flow-disturbing hole is arranged, and touches and urea is dispersed as fine drop after urea, and fully mixed with tail gas, be convenient for subsequent chemical reaction；It is pyramidal structure by the inner cavity of nozzle carrier, urea will not be attached on the inner wall of nozzle carrier, prevent urea crystals.
Description
Technical field
The utility model is related to exhaust system technical field more particularly to a kind of injection of exhaust aftertreatment urea and mixing knots
Structure.
Background technology
SCR post-processing technologies are that mainstream technology is discharged by diesel engine state four and state five, principle be aqueous solution of urea (mainly at
It is divided into NH3) it is ejected into tail gas, after fully mixed, by catalyst, NH3 is carried out with the NOX (nitrogen oxides) in tail gas
Chemical reaction generates nitrogen and water, achievees the purpose that reduce tail gas NOX.
In the entire reaction process of SCR, it is design difficulty how urea and tail gas be sufficiently mixed, currently on the market
Urea nozzle seat shape be mostly cylinder, urea is easy to be attached on nozzle carrier inner wall, and mixer is protected with being unable to fully
Card urea is sufficiently mixed with tail gas, leads to urea crystals.
Based on the above considerations, the utility model devises a kind of injection of exhaust aftertreatment urea and mixed structure.
Utility model content
The purpose of the utility model is to overcome the deficiencies in the prior art, a kind of exhaust aftertreatment urea injection and mixed is provided
Structure is closed, urea crystals, urea can be prevented to be sufficiently mixed with tail gas.
In order to realize that the purpose of this utility model, the technical solution adopted in the utility model be：
The utility model discloses a kind of exhaust aftertreatment urea injection and mixed structure, including exhaust pipe, for connecting
The nozzle carrier of urea nozzle is fixed with mixer on the inner wall of the exhaust pipe, and the mixer is arc-shaped structure and it is justified
Arc side wall is connected with the inner wall of institute's exhaust pipe；The mixer is evenly distributed with several flow-disturbing holes.
The through-hole being inserted into for mixer is formed on the side wall of the exhaust pipe.
One end of the nozzle carrier is equipped with the connecting seat for being connect with urea nozzle, and the other end is with setting in exhaust pipe side
Urea hole connection on wall；The generally conical shape structure in longitudinal section of the nozzle carrier inner cavity and its cross section by connecting seat one end
Gradually increase to the one end being connected with urea hole.
The section structure triangular in shape of the connecting seat, the connecting seat be equipped with for the fixing bolt in urea nozzle
The threaded hole of connection.
The end outer wall that the nozzle carrier is connected with the urea hole is equipped with to be connected for being fixed with the exhaust pipe side wall
The outer rim connect.
The beneficial effects of the utility model are：
1. the utility model makes tail gas by becoming flow-disturbing by parallel airflow after mixer by the way that flow-disturbing hole is arranged, contact
Urea is dispersed as fine drop after to urea, and is fully mixed with tail gas, subsequent chemical reaction is convenient for；
2. the inner cavity that the utility model passes through nozzle carrier is pyramidal structure, urea will not be attached on the inner wall of nozzle carrier,
Prevent urea crystals.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the exploded perspective view of the utility model；
Fig. 3 is the sectional view of the utility model.
In figure, 1 exhaust pipe, 11 through-holes, 12 urea holes, 2 nozzle carriers, 21 connecting seats, 22 outer rims, 3 mixers, 31 flow-disturbings
Hole, 4 urea nozzles.
Specific implementation mode
The utility model is further illustrated with reference to the accompanying drawings and examples：
Referring to Fig. 1-Fig. 3.
The utility model discloses a kind of exhaust aftertreatment urea injection and mixed structure, including exhaust pipe 1, for connecting
The nozzle carrier 2 of urea nozzle 4, is fixed with mixer 3 on the inner wall of the exhaust pipe 1, the mixer 3 be arc-shaped structure and
Its circular arc side wall is connected with the inner wall of institute exhaust pipe 1, it is ensured that mixer 3 is more bonded with exhaust pipe 1 makes it preferably change tail
Gas airflow direction；The mixer 3 is evenly distributed with several flow-disturbing holes 31, by the way that flow-disturbing hole 31 is arranged so that tail gas passes through mixing
Flow-disturbing is become by parallel airflow after device 3, touches and urea is dispersed as fine drop after urea, and fully mixed with tail gas
It closes, is convenient for subsequent chemical reaction.
It is formed with the through-hole 11 being inserted into for mixer 3 on the side wall of the exhaust pipe 1, mixer 3 is inserted by when installation
After through-hole 11, the circular arc side wall of mixer 3 is fixed with through-hole 11, the installation of mixer 3 is convenient in the methods of such as welding.
One end of the nozzle carrier 2 is equipped with the connecting seat 21 for being connect with urea nozzle 4, and the other end is being vented with setting
Urea hole 12 on 1 side wall of pipe is connected to；The generally conical shape structure in longitudinal section of 2 inner cavity of the nozzle carrier and its cross section is by connecting
One end of seat 21 gradually increases to the one end being connected with urea hole 12, and urea nozzle 4 is ejected into urea in the tail gas of exhaust pipe 1
In, urea initial track is taper, the inner cavity of nozzle carrier 2 is also configured as taper, urea will not be attached to the inner wall of nozzle carrier 2
On, prevent urea crystals.
The section structure triangular in shape of the connecting seat 21, the connecting seat 21 be equipped with for consolidating in urea nozzle 4
Fixed bolted threaded hole, is convenient for the installation and dismounting of urea nozzle 4 by the way that connecting seat 21 is arranged.
The end outer wall that the nozzle carrier 2 is connected with the urea hole 12 is equipped with for solid with 1 side wall of the exhaust pipe
Surely the outer rim 22 connected, by the way that outer rim 22 is arranged, convenient for being fitted and connected with the outer wall of exhaust pipe 1.
The above description is only the embodiments of the present invention, and it does not limit the scope of the patent of the present invention, every
Equivalents made based on the specification and figures of the utility model are applied directly or indirectly in relevant technical field,
It is equally included in the patent within the scope of the utility model.
Claims (5)
1. a kind of exhaust aftertreatment urea injection and mixed structure, including exhaust pipe (1), the spray for connecting urea nozzle (4)
Mouth seat (2), it is characterised in that：Mixer (3) is fixed on the inner wall of the exhaust pipe (1), the mixer (3) is arc-shaped
Structure and its circular arc side wall is connected with the inner wall of institute's exhaust pipe (1)；The mixer (3) is evenly distributed with several flow-disturbing holes
(31)。
2. a kind of exhaust aftertreatment urea injection according to claim 1 and mixed structure, it is characterised in that：The exhaust
It manages and is formed with the through-hole (11) being inserted into for mixer (3) on the side wall of (1).
3. a kind of exhaust aftertreatment urea injection according to claim 1 or 2 and mixed structure, it is characterised in that：It is described
One end of nozzle carrier (2) is equipped with the connecting seat (21) for being connect with urea nozzle (4), and the other end is with setting in exhaust pipe (1)
Urea hole (12) connection on side wall；The generally conical shape structure in longitudinal section of nozzle carrier (2) inner cavity and its cross section is by even
One end of joint chair (21) gradually increases to the one end being connected with urea hole (12).
4. a kind of exhaust aftertreatment urea injection according to claim 3 and mixed structure, it is characterised in that：The connection
The section structure triangular in shape of seat (21), the connecting seat (21) are equipped with for being connect with the fixing bolt in urea nozzle (4)
Threaded hole.
5. a kind of exhaust aftertreatment urea injection according to claim 3 and mixed structure, it is characterised in that：The nozzle
The end outer wall that seat (2) is connected with the urea hole (12) is equipped with outer for what is be fixedly connected with the exhaust pipe (1) side wall
Edge (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820590490.9U CN208089388U (en) | 2018-04-24 | 2018-04-24 | A kind of injection of exhaust aftertreatment urea and mixed structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820590490.9U CN208089388U (en) | 2018-04-24 | 2018-04-24 | A kind of injection of exhaust aftertreatment urea and mixed structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208089388U true CN208089388U (en) | 2018-11-13 |
Family
ID=64051891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820590490.9U Active CN208089388U (en) | 2018-04-24 | 2018-04-24 | A kind of injection of exhaust aftertreatment urea and mixed structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208089388U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681300A (en) * | 2019-02-28 | 2019-04-26 | 一汽解放汽车有限公司 | A kind of preposition baffle mixing arrangement preventing urea crystals |
-
2018
- 2018-04-24 CN CN201820590490.9U patent/CN208089388U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681300A (en) * | 2019-02-28 | 2019-04-26 | 一汽解放汽车有限公司 | A kind of preposition baffle mixing arrangement preventing urea crystals |
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| GR01 | Patent grant |