CN207229212U - Diesel engine after treatment device - Google Patents
Diesel engine after treatment device Download PDFInfo
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- CN207229212U CN207229212U CN201721299717.6U CN201721299717U CN207229212U CN 207229212 U CN207229212 U CN 207229212U CN 201721299717 U CN201721299717 U CN 201721299717U CN 207229212 U CN207229212 U CN 207229212U
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- mixing
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Abstract
The utility model discloses 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 the centre position of discharge duct, and mixed core is embedded with mixing tube and then forms mixer, and the length of mixing tube is more than 2.5 times of mixed tube diameter, and 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, 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, and the first bend pipe is consistent with the diameter of mixing tube；And rear straight tube, one end of its setting catalytic muffler erect, rear straight tube and mixing tube connect, 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 IV exhaust gas from diesel vehicle discharge treating system of state
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 understanding of the increase to the general background of the 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, improves 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 exhaust pipe
The centre position in road, mixed core is embedded with mixing tube and then forms mixer, the length of mixing tube is more than mixed tube diameter
2.5 times, 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 is by booster
Connected with mixing tube, there is bellows segment between the first bend pipe and booster, the bending radius of the first bend pipe is more than mixing tube
Diameter, the first bend pipe is consistent with the diameter of mixing tube；And rear straight tube, one end of its setting catalytic muffler erect, after
Straight tube and mixing tube connect, and the length of rear straight tube is more than 2 times of the diameter of mixing tube, the diameter of rear straight tube and mixing tube
Diameter is consistent.
Preferably, the inner-walls of duct of rear straight tube is smooth.
Preferably, mixing tube with the first bend pipe and rear straight tube by being welded to connect, mixing tube and rear straight tube and the first bend pipe
Weld seam and mixing tube interior walls be smooth transition.
Compared with prior art, the utility model has the advantages that：Pass through each pipeline to discharge duct
Length and the diameter Relationship of mixing tube design so that mixer is arranged in the straight pipe of exhaust pipe, because mixer is by mixing
Core built-in mosaic is formed in mixing tube so that mixer front and back end does not have reducer pipe, and the straight tube of mixer rear end is designed to one
Fixed length, turbulent flow will not be caused in discharge duct and then causes mixer position local air flow flowing velocity low, will not be led
Cause adds blue aggregation, moisture evaporation, improves urea Crystallization, ensures that exhaust pipe is unobstructed, avoids causing engine failure.
Brief description of the drawings
Fig. 1 is the structure diagram of diesel engine after treatment device according to 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 and from the limitation of 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 and rear straight tube 33, wherein mixing tube 31 are in the centre position of discharge duct, are embedded with mixing tube 31 mixed
Close core and then form mixer, the length of mixing tube 31 is more than 2.5 times of 31 diameter of mixing tube, is tilted on the tube wall of mixing tube 31
Equipped with nozzle 34,34 optimal setting angle of nozzle is 60 °~70 ° scopes.First bend pipe 32 is bent downwardly, the first bend pipe 32
Booster 2 and mixing tube 31 are connected, there is bellows segment between the first bend pipe 32 and booster 2, the first bend pipe 32 it is curved
Bilge radius are more than the diameter of mixing tube 31, and the first bend pipe 32 is consistent with the diameter of mixing tube 31.The setting that straight tube 33 is erect afterwards is urged
Change one end of silencer 1, rear straight tube 33 and mixing tube 31 connect, and the length of rear straight tube 33 is more than the diameter of mixing tube 31
2 times, the diameter of rear straight tube 33 is consistent with the diameter of mixing tube 31.
As a kind of preferred embodiment, the inner-walls of duct of rear straight tube 33 is smooth.
As a kind of preferred embodiment, mixing tube 31 with the first bend pipe 32 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 rear 33 and first bend pipe 32 of straight tube and mixing tube 31.
In such scheme, designed by the length of each pipeline to discharge duct and the diameter Relationship of mixing tube so that
Mixer is arranged in the straight pipe of exhaust pipe, because mixer is to be embedded in mixing tube to be formed by mixed core so that mixer
Front and back end does not have reducer pipe, and the straight tube of mixer rear end is designed to certain length, will not cause in discharge duct disorderly
Flow into and cause mixer position local air flow flowing velocity low, will not cause to add blue aggregation, moisture evaporation, improve urea and resist
Crystallizing power, ensures that exhaust pipe is unobstructed, avoids causing engine failure.
To sum up, the diesel engine after treatment device of the present embodiment, by the length of each pipeline to discharge duct with mixing
Pipe diameter Relationship design so that mixer is arranged in the straight pipe of exhaust pipe because mixer be embedded in by mixed core it is mixed
To close and formed in pipe so that mixer front and back end does not have reducer pipe, and the straight tube of mixer rear end is designed to certain length,
Turbulent flow will not be caused in discharge duct and then cause mixer position local air flow flowing velocity low, will not cause to add blue aggregation,
Moisture evaporation, improves urea Crystallization, ensures that exhaust pipe is unobstructed, avoids causing engine failure.
The description of the foregoing specific exemplary embodiment to the utility model be in order to illustrate and illustration purpose.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 the above instruction, can carry out
Many change and variations.The purpose of selecting and describing the exemplary embodiment is that explain the certain principles of the utility model
And its practical application, so that those skilled in the art can realize and utilize a variety of examples of the utility model
Property embodiment and various chooses and changes.The scope of the utility model is intended to by claims and its waits similar shape
Formula 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, the length of the mixing tube are more than 2.5 times of the mixed tube diameter, nozzle are 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, There is bellows segment, the bending radius of first bend pipe is more than the mixing tube between first bend pipe and the booster Diameter, first bend pipe are consistent with the diameter of the mixing tube；AndStraight tube afterwards, one end of its setting catalytic muffler erect, the rear straight tube and the mixing tube connect, institute The length of rear straight tube is stated more than 2 times of the diameter of the mixing tube, the diameter one of the diameter and the mixing tube of the rear straight tube Cause.
- 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 is mixed 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 |
|---|---|---|---|
| CN201721299717.6U CN207229212U (en) | 2017-10-10 | 2017-10-10 | Diesel engine after treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721299717.6U CN207229212U (en) | 2017-10-10 | 2017-10-10 | Diesel engine after treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207229212U true CN207229212U (en) | 2018-04-13 |
Family
ID=61851269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721299717.6U Active CN207229212U (en) | 2017-10-10 | 2017-10-10 | Diesel engine after treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207229212U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107503829A (en) * | 2017-10-10 | 2017-12-22 | 广西玉柴机器股份有限公司 | Diesel engine after treatment device |
-
2017
- 2017-10-10 CN CN201721299717.6U patent/CN207229212U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107503829A (en) * | 2017-10-10 | 2017-12-22 | 广西玉柴机器股份有限公司 | Diesel engine after treatment device |
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