CN207212451U - Diesel engine after treatment device - Google Patents
Diesel engine after treatment device Download PDFInfo
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- CN207212451U CN207212451U CN201721298516.4U CN201721298516U CN207212451U CN 207212451 U CN207212451 U CN 207212451U CN 201721298516 U CN201721298516 U CN 201721298516U CN 207212451 U CN207212451 U CN 207212451U
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- bend pipe
- mixing tube
- tube
- diameter
- 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, first bend pipe are bent downwardly, and the first bend pipe connects booster and mixing tube, and the first bend pipe is consistent with the diameter of mixing tube, have bellows segment between the first bend pipe and booster, and the bending radius of the first bend pipe is more than the diameter of mixing tube；Second bend pipe, second bend pipe are connected with catalytic muffler, and the bending radius of the second bend pipe is more than the diameter of mixing tube, and the length of the second bend pipe is more than 2.5 times of the diameter of mixing tube；And rear straight tube, it connects the second 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.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 bent downwardly, and the first bend pipe connects booster and mixing tube, the first bend pipe and booster it
Between there is bellows segment, the first bend pipe is consistent with the diameter of mixing tube, and the bending radius of the first bend pipe is more than the diameter of mixing tube；The
Two bend pipes, second bend pipe are connected with catalytic muffler, and the bending radius of the second bend pipe is more than the diameter of mixing tube, and second is curved
The length of pipe is more than 2.5 times of the diameter of mixing tube；And rear straight tube, it connects the second bend pipe and mixing tube, rear straight
The length of pipe 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.
Preferably, the inner-walls of duct of rear straight tube is smooth.
Preferably, with rear straight tube and preceding straight tube by being welded to connect, mixing tube leads to mixing tube with the first bend pipe and rear straight tube
Cross and be welded to connect, the interior walls be smooth transition of mixing tube and rear straight tube and the weld seam and mixing tube of the first bend pipe.
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 mixed in close in pipe by mixing core built-in mosaic to be formed so that blender front and back end does not have reducer pipe, and blender
The straight tube of rear end 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 is low, will not cause to add blue aggregation, moisture evaporation, improve urea Crystallization, ensure that blast pipe is unobstructed, avoid
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 33, the second bend pipe 32 and rear straight tube 34, wherein mixing tube 31 are in the centre position of discharge duct, mixing tube
Mixed core is embedded with 31 and then forms blender, is provided tiltedly with nozzle 35 on the tube wall of mixing tube 31, nozzle 35 is optimal
Setting angle is 60 °~70 ° scopes, and the first bend pipe 33 is bent downwardly, and booster 2 has been connected by the first bend pipe 33 with mixing tube 31
To come, there is bellows segment between the first bend pipe 33 and booster 2, the bending radius of the first bend pipe 33 is more than the diameter of mixing tube 31,
First bend pipe 33 is consistent with the diameter of mixing tube 31.Second bend pipe 32 is connected with catalytic muffler 1, the bending half of the second bend pipe 32
Footpath is more than the diameter of mixing tube 31, and the length of the second bend pipe 32 is more than 2.5 times of the diameter of mixing tube 31, and rear straight tube 34 is by second
Bend pipe 32 and mixing tube 31 connect, and the length of rear straight tube 34 is more than 2 times of the diameter of mixing tube 31, the diameter of rear straight tube 34
It is consistent with the diameter of mixing tube 31.
As a kind of preferred embodiment, the inner-walls of duct of rear straight tube 35 is smooth, prevents residual urea and crystallization.
As a kind of preferred embodiment, mixing tube 31 with rear straight tube 35 and rear straight tube 34 by being welded to connect, mixing tube 31
With the interior walls be smooth transition of the weld seam and mixing tube 31 of the rear bend pipe 33 of straight tube 34 and first, 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
Formed in pipe so that blender front and back end does not have reducer pipe, and the straight tube of blender rear end is designed to certain length, is arranging
Turbulent flow will not be caused in feed channel and then cause blender position local air flow flowing velocity low, will not cause to add blue aggregation, water
Divide evaporation, improve urea Crystallization, 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 the straight tube of blender rear end
Certain length is designed to, 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 specific original of the present utility model
Reason 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 bent downwardly, and first bend pipe connects the booster and the mixing tube, First bend pipe is consistent with the diameter of the mixing tube, has bellows segment, institute between first bend pipe and the booster The bending radius for stating the first bend pipe is more than the diameter of the mixing tube；Second bend pipe, second bend pipe are connected with the catalytic muffler, and the bending radius of second bend pipe is more than described mix The diameter of pipe is closed, the length of second bend pipe is more than 2.5 times of the diameter of the mixing tube；AndStraight tube afterwards, it connects second 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.
- 2. diesel engine after treatment device according to claim 1, it is characterised in that the inner-walls of duct of straight tube is put down after described It is sliding.
- 3. diesel engine after treatment device according to claim 1, it is characterised in that the mixing tube and first bend pipe With the rear straight tube by being welded to connect, the mixing tube mixes with the weld seam of the rear straight tube and first bend pipe with described The interior walls be smooth transition of pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721298516.4U CN207212451U (en) | 2017-10-10 | 2017-10-10 | Diesel engine after treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721298516.4U CN207212451U (en) | 2017-10-10 | 2017-10-10 | Diesel engine after treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207212451U true CN207212451U (en) | 2018-04-10 |
Family
ID=61820712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721298516.4U Active CN207212451U (en) | 2017-10-10 | 2017-10-10 | Diesel engine after treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207212451U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107642398A (en) * | 2017-10-10 | 2018-01-30 | 广西玉柴机器股份有限公司 | Diesel engine after treatment device |
-
2017
- 2017-10-10 CN CN201721298516.4U patent/CN207212451U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107642398A (en) * | 2017-10-10 | 2018-01-30 | 广西玉柴机器股份有限公司 | Diesel engine after treatment device |
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