CN207212452U - Diesel engine after treatment device - Google Patents
Diesel engine after treatment device Download PDFInfo
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- CN207212452U CN207212452U CN201721299041.0U CN201721299041U CN207212452U CN 207212452 U CN207212452 U CN 207212452U CN 201721299041 U CN201721299041 U CN 201721299041U CN 207212452 U CN207212452 U CN 207212452U
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- tube
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- bend pipe
- mixing
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Abstract
The utility model discloses a kind of diesel engine after treatment device, including catalytic muffler, booster and discharge duct connection, discharge duct to include：Mixing tube, it is in the centre position of discharge duct, and mixed core is embedded with mixing tube and then forms blender, nozzle is provided tiltedly with the tube wall of mixing tube；First bend pipe, it is connected with catalytic muffler, and the first bend pipe is bent upwards, and the length of the first bend pipe is more than 2.5 times of the diameter of mixing tube；Straight tube afterwards, it connects the first bend pipe and mixing tube, and the length of rear straight tube is more than 2 times of the diameter of mixing tube, and the diameter of rear straight tube is consistent with the diameter of mixing tube；Second bend pipe, it is connected with booster, and the turning radius of the second bend pipe is more than the diameter of mixing tube；And preceding straight tube, it connects the second bend pipe and mixing tube, and the length of preceding straight tube is more than 1.5 times of the diameter of mixing tube, and the diameter of preceding straight tube is consistent with the diameter of mixing tube.The device improves urea Crystallization.
Description
Technical field
It the utility model is related to diesel engine vent gas post processing field, more particularly to a kind of diesel engine after treatment device.
Background technology
In diesel engine vent gas post processing, SCR schemes have obvious excellent in the exhaust gas from diesel vehicle discharge treating system of state IV
Gesture, and urea for vehicle (adding indigo plant) is the required additive of SCR schemes.Blue tube is that connection adds blue tank, metering ejector pump, nozzle with
For adding the blue pipeline in internal system flowing.At present, urea crystals are frequently present of on the pipeline of blue tube, and then block exhaust
Pipe, causes engine catastrophe failure.
The information for being disclosed in the background section is merely intended to increase the understanding to general background of the present utility model, and
It is not construed as recognizing or implies that the information structure has been existing well known to persons skilled in the art in any form
Technology.
Utility model content
The purpose of this utility model is to provide a kind of diesel engine after treatment device, raising urea Crystallization.
To achieve the above object, the utility model provides a kind of diesel engine after treatment device, including：Catalytic muffler；
Booster, the booster are connected with catalytic muffler by discharge duct, and discharge duct includes：Mixing tube, it is in blast pipe
The centre position in road, mixed core is embedded with mixing tube and then forms blender, nozzle is provided tiltedly with the tube wall of mixing tube；The
One bend pipe, first bend pipe are connected with catalytic muffler, and the first bend pipe is bent upwards, and the length of the first bend pipe is more than mixing tube
2.5 times of diameter；Straight tube afterwards, it connects the first bend pipe and mixing tube, and the length of rear straight tube is more than the diameter of mixing tube
2 times, the diameter of rear straight tube is consistent with the diameter of mixing tube；Second bend pipe, second bend pipe are connected with booster, and second is curved
The turning radius of pipe is more than the diameter of mixing tube；And preceding straight tube, it connects the second bend pipe and mixing tube, preceding straight tube
Length is more than 1.5 times of the diameter of mixing tube, and the diameter of preceding straight tube is consistent with the diameter of mixing tube.
Preferably, the inner-walls of duct of preceding straight tube is smooth.
Preferably, mixing tube with rear straight tube and preceding straight tube by being welded to connect, the weldering of mixing tube and rear straight tube and preceding straight tube
The interior walls be smooth transition of seam and mixing tube.
Compared with prior art, the utility model has the advantages that：Pass through each pipeline to discharge duct
The diameter Relationship of straight curved selection, the length of each pipeline and mixing tube designs so that and blender is arranged in the straight length of blast pipe,
Because blender is to be embedded in mixing tube to be formed by mixed core so that blender front and back end does not have reducer pipe, and blender
The straight tube of front and back end is designed to certain length, and turbulent flow will not be caused in discharge duct and then causes blender position part gas
It is low to flow flowing velocity, will not cause to add blue aggregation, moisture evaporation, improve urea Crystallization, ensure that blast pipe is unobstructed, keep away
Exempt to cause engine failure.
Brief description of the drawings
Fig. 1 is the structural representation according to diesel engine after treatment device of the present utility model.
Embodiment
Below in conjunction with the accompanying drawings, specific embodiment of the present utility model is described in detail, it is to be understood that this practicality
New protection domain is not limited by embodiment.
Explicitly indicated that unless otherwise other, otherwise in entire disclosure and claims, term " comprising " or its change
Change such as "comprising" or " including " etc. and will be understood to comprise stated element or part, and do not exclude other members
Part or other parts.
As shown in figure 1, according to a kind of diesel engine after treatment device of the utility model embodiment, including：Catalysis
Silencer 1 and booster 2, the booster 2 are connected with catalytic muffler 1 by discharge duct, discharge duct include mixing tube 31,
First bend pipe 32, rear straight tube 33, the second bend pipe 34 and preceding straight tube 35, wherein mixing tube 31 are in the interposition of discharge duct
Put, mixed core is embedded with mixing tube 31 and then forms blender, nozzle 36, nozzle are provided tiltedly with the tube wall of mixing tube 31
36 optimal setting angles are 60 °~70 ° scopes, and the first bend pipe 32 is connected with catalytic muffler 1, and the first bend pipe 323 is upward
Bending, the length of the first bend pipe 32 are more than 2.5 times of the diameter of mixing tube 31, and rear straight tube 33 is by the first bend pipe 32 and mixing tube 31
Connect, the length of rear straight tube 33 is more than 2 times of the diameter of mixing tube 31, the diameter of rear straight tube 33 and the diameter of mixing tube 31
Unanimously, the second bend pipe 34 is connected with booster 2, and the turning radius of the second bend pipe 34 is more than the diameter of mixing tube 31, preceding straight tube 35
Second bend pipe 34 and mixing tube 31 are connected, the length of preceding straight tube 35 is more than 1.5 times of the diameter of mixing tube 31, preceding straight tube
35 diameter is consistent with the diameter of mixing tube 31.
As a kind of preferred embodiment, the inner-walls of duct of preceding straight tube 35 is smooth, prevents residual urea and crystallization.
As a kind of preferred embodiment, mixing tube 31 with preceding straight tube 35 and rear straight tube 33 by being welded to connect, mixing tube 31
With the interior walls be smooth transition of the weld seam of preceding straight tube 35 and rear straight tube 33 and mixing tube 31, residual urea and crystallization are prevented.
In such scheme, pass through straight curved selection, the length of each pipeline and the mixing tube of each pipeline to discharge duct
Diameter Relationship design so that blender is arranged in the straight length of blast pipe, because blender is to be embedded in mixing by mixed core
Being formed in pipe so that blender front and back end does not have reducer pipe, and the straight tube of blender front and back end is designed to certain length,
Turbulent flow will not be caused in discharge duct and then cause blender position local air flow flowing velocity low, will not cause to add blue aggregation,
Moisture evaporation, urea Crystallization is improved, ensure that blast pipe is unobstructed, avoid causing engine failure.
To sum up, the diesel engine after treatment device of the present embodiment, by the straight curved selection of each pipeline to discharge duct, respectively
The length of individual pipeline and the diameter Relationship of mixing tube design so that blender is arranged in the straight length of blast pipe, because blender
It is to be embedded in mixing tube to be formed by mixed core so that blender front and back end does not have reducer pipe, and blender front and back end is straight
Pipe is designed to certain length, and turbulent flow will not be caused in discharge duct and then causes blender position local air flow flowing velocity
It is low, it will not cause to add blue aggregation, moisture evaporation, improve urea Crystallization, ensure that blast pipe is unobstructed, avoid causing and start
Machine failure.
The foregoing description to specific illustrative embodiment of the present utility model is to illustrate and the purpose of illustration.These
Description is not wishing to for the utility model to be defined to disclosed precise forms, and it will be apparent that according to above-mentioned teaching, can carry out
It is many to change and change.The purpose of selecting and describing the exemplary embodiment is that explain certain principles of the present utility model
And its practical application, so that those skilled in the art can realize and utilize of the present utility model a variety of show
Example property embodiment and various chooses and changes.The scope of the utility model is intended to by claims and its is equal
Form is limited.
Claims (3)
- A kind of 1. diesel engine after treatment device, it is characterised in that including：Catalytic muffler；Booster, the booster are connected with the catalytic muffler by discharge duct, and the discharge duct includes：Mixing tube, it is in the centre position of the discharge duct, and mixed core is embedded with the mixing tube and then forms mixing Device, nozzle is provided tiltedly with the tube wall of the mixing tube；First bend pipe, first bend pipe are connected with the catalytic muffler, and first bend pipe is bent upwards, first bend pipe Length be more than 2.5 times of diameter of the mixing tube；Straight tube afterwards, it connects first bend pipe and the mixing tube, and the length of the rear straight tube is more than the mixing 2 times of the diameter of pipe, the diameter of the rear straight tube are consistent with the diameter of the mixing tube；Second bend pipe, second bend pipe are connected with the booster, and the turning radius of second bend pipe is more than the mixing tube Diameter；AndPreceding straight tube, it connects second bend pipe and the mixing tube, and the length of the preceding straight tube is more than the mixing 1.5 times of the diameter of pipe, the diameter of the preceding straight tube are consistent with the diameter of the mixing tube.
- 2. diesel engine after treatment device according to claim 1, it is characterised in that the inner-walls of duct of the preceding straight tube is put down It is sliding.
- 3. diesel engine after treatment device according to claim 1, it is characterised in that the mixing tube with it is described after straight tube and The preceding straight tube is by being welded to connect, the mixing tube and the weld seam of the rear straight tube and the preceding straight tube and the mixing tube Interior walls be smooth transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721299041.0U CN207212452U (en) | 2017-10-10 | 2017-10-10 | Diesel engine after treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721299041.0U CN207212452U (en) | 2017-10-10 | 2017-10-10 | Diesel engine after treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207212452U true CN207212452U (en) | 2018-04-10 |
Family
ID=61820725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721299041.0U Active CN207212452U (en) | 2017-10-10 | 2017-10-10 | Diesel engine after treatment device |
Country Status (1)
| Country | Link |
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| CN (1) | CN207212452U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559082A (en) * | 2017-10-10 | 2018-01-09 | 广西玉柴机器股份有限公司 | Diesel engine after treatment device |
-
2017
- 2017-10-10 CN CN201721299041.0U patent/CN207212452U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107559082A (en) * | 2017-10-10 | 2018-01-09 | 广西玉柴机器股份有限公司 | Diesel engine after treatment device |
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