CN104832255B - Two-layer hybrid pipe and its exhaust gas treatment device - Google Patents
Two-layer hybrid pipe and its exhaust gas treatment device Download PDFInfo
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- CN104832255B CN104832255B CN201510243073.8A CN201510243073A CN104832255B CN 104832255 B CN104832255 B CN 104832255B CN 201510243073 A CN201510243073 A CN 201510243073A CN 104832255 B CN104832255 B CN 104832255B
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Abstract
A kind of two-layer hybrid pipe comprising inner tube, the coupling tube for being sleeved on the outer tube of said inner tube periphery and being connected with said inner tube.Said inner tube penetrates through in an axial direction, and said inner tube includes the first end and second end being oppositely arranged in the axial direction, wherein the coupling tube is connected with the first end.The outer tube includes mutually matched first semicanal and the second semicanal, first semicanal and second semicanal are mutually staggered radially to form first outlet and second outlet in the circumferential, and the first outlet is opposite with the opening direction of the second outlet forming exhaust eddy flow.So set, increasing the stroke of air-flow in a limited space, the distance of urea droplets evaporation is increased, evaporation rate is improved, improves the uniformity of mixing, reduce the risk of urea crystals.Present invention further teaches a kind of exhaust gas treatment devices with above-mentioned two-layer hybrid pipe.
Description
Technical field
The present invention relates to a kind of two-layer hybrid pipe and its exhaust gas treatment devices, belong to engine exhaust post-processing technology neck
Domain.
Background technology
Research shows that exhaust after treatment system（Such as selective catalytic reduction system operating, SCR system）Ammonia is distributed in pipeline
Uniformity coefficient has important influence to the overall performance and endurance quality of system.If ammonia, which is unevenly distributed, can lead to regional area
Ammonia causes oxynitrides excessively to easily cause NH_3 leakage in other ammonia thin areas（NOx）Transformation efficiency is too low.It is long
The uneven distribution of time ammonia can cause catalyst aging uneven, to influence the overall performance of catalyst.In addition, urea solution
The uneven distribution of drop can cause local tube wall or mixed structure temperature too low, form crystallization, exhaust pipe can be blocked when serious, is led
Engine power performance is caused to decline.
Therefore, it is necessary to a kind of novel mixing tube and its exhaust gas treatment device with the mixing tube be provided, to solve
Above-mentioned technical problem.
Invention content
The purpose of the present invention is to provide a kind of uniformly mixed two-layer hybrid pipe and the row with the two-layer hybrid pipe
Flash Gas Compression Skid System.
To achieve the above object, the present invention adopts the following technical scheme that：A kind of two-layer hybrid pipe, at engine exhaust
It manages in device, the two-layer hybrid pipe includes inner tube, the mistake that is sleeved on the outer tube of said inner tube periphery and is connected with said inner tube
Pipe is crossed, said inner tube penetrates through in an axial direction, and said inner tube includes the first end and second end being oppositely arranged in the axial direction, wherein
The coupling tube is connected with the first end, and the outer tube includes mutually matched first semicanal and the second semicanal, and described
One semicanal and second semicanal are mutually staggered radially to form first outlet and second outlet in the circumferential, and described first
Outlet is opposite with the opening direction of the second outlet forming exhaust eddy flow.
As further improved technical scheme of the present invention, the outer tube includes the third being oppositely arranged in the axial direction
End and the 4th end, wherein the third end is close to the first end, the 4th end is close to the second end；The two-layer hybrid
Pipe further includes being located at the 4th end and to the end plate of reflected gas stream.
As further improved technical scheme of the present invention, the second end is spaced one with the end plate in the axial direction
Fixed distance, the end plate are equipped with the arc convex protruded out to the second end.
As further improved technical scheme of the present invention, the center of the arc convex and the axis of said inner tube are in institute
It states and is mutually aligned in axial direction, the end plate is equipped with the arc-shaped concave positioned at arc convex periphery.
As further improved technical scheme of the present invention, the coupling tube is equipped with and is radially positioned said inner tube and institute
It states the conical surface between outer tube and along the fitting surface being axially inserted into the first end, the fitting surface is welded with said inner tube
It connects.
As further improved technical scheme of the present invention, the third end is welded with the conical surface, and the end plate is equipped with
To position the step surface at the 4th end.
As further improved technical scheme of the present invention, first semicanal includes the first end for being located at both sides
And second end；Second semicanal includes the third end and the 4th end for being located at both sides；The first end
Close to the third end, the first outlet is between the first end and the third end；The second end
Close to the 4th end, the second outlet is between the second end and the 4th end.
As further improved technical scheme of the present invention, first semicanal includes the first curved pipe and with described the
The first connected wall extension of one curved pipe, the first end are located on first curved pipe, and the second end is located at institute
It states on the first wall extension；Second semicanal includes the second curved pipe and the second extension being connected with second curved pipe
Wall, the third end are located on second wall extension, and the 4th end is located on second curved pipe；Described second
End is located at the outside of the 4th end and extends beyond the 4th end in the circumferential, and the third end is located at described
The outside of first end and the first end is extended beyond in the circumferential.
The present invention also provides a kind of exhaust gas treatment devices comprising at shell and the tail gas being installed in the shell
Module is managed, the shell includes positioned at the first cavity of vent gas treatment module upstream and positioned at the vent gas treatment module
Second cavity in downstream, the exhaust gas treatment device further include above-mentioned two-layer hybrid pipe, and the two-layer hybrid pipe is located at described
In first cavity.
As further improved technical scheme of the present invention, the shell includes the end cone equipped with gas feed, the end
Cone is equipped with to install the mounting base of urea nozzle, and the gas feed is connected to the coupling tube.
As further improved technical scheme of the present invention, the exhaust gas treatment device further includes being located at first cavity
For interior first partition first cavity is divided into the first cushion chamber and the second cushion chamber, the two-layer hybrid pipe is located at institute
It states in the first cushion chamber, the vent gas treatment module is located at the downstream of the first partition and is connected with second cushion chamber,
The first partition correspond to the part other than the two-layer hybrid pipe equipped with several first through hole with will first cushion chamber and
The second cushion chamber connection.
As further improved technical scheme of the present invention, the exhaust gas treatment device further includes being located at second cavity
Second cavity is divided into third cushion chamber and the 4th cushion chamber, the exhaust gas treatment device includes interior second partition
Across the second partition and the outlet in the third cushion chamber is extended into, the second partition is equipped with several second through-holes
The third cushion chamber to be connected to the 4th cushion chamber, the outlet is additionally provided with to be connected with the 4th cushion chamber
Several ventholes.
Compared to the prior art, two-layer hybrid pipe of the invention includes inner tube and outer tube, wherein the outer tube includes phase
The first semicanal and the second semicanal mutually coordinated, first semicanal are mutually staggered radially with second semicanal in week
It is upwardly formed first outlet and second outlet, the first outlet is opposite with the opening direction of the second outlet to the row of being formed
Cyclonic current.So set, increasing the stroke of air-flow in a limited space, to increase the distance of urea droplets evaporation, improve
Evaporation rate improves the uniformity of mixing, reduces the risk of urea crystals.
Description of the drawings
Fig. 1 is the stereoscopic schematic diagram of exhaust gas treatment device of the present invention.
Fig. 2 is the stereoscopic schematic diagram of another angles of Fig. 1.
Fig. 3 is the front view of Fig. 1.
Fig. 4 is the right view of Fig. 1.
Fig. 5 is the left view of Fig. 1.
Fig. 6 is the stereogram exploded view of Fig. 1.
Fig. 7 is the stereogram exploded view of another angles of Fig. 6.
Fig. 8 is the diagrammatic cross-section of the line A-A along Fig. 3.
Fig. 9 is the stereogram of two-layer hybrid pipe in Fig. 1.
Figure 10 is the front view of Fig. 9.
Figure 11 is identical as the angle of Figure 10, and arrows is used in combination to go out the direction of rotation of exhaust.
Specific implementation mode
It please join shown in Fig. 1 to Fig. 8, present invention is disclosed a kind of exhaust gas treatment devices 100, to the exhaust of purifying engine
（Such as it reduces the content of oxynitrides and/or reduces the content etc. of particulate matter）.The exhaust gas treatment device 100 includes shell
1, the vent gas treatment module 2 being installed in the shell 1（Such as selective oxidation catalytic module, SCR）And it is installed on described
Two-layer hybrid pipe 3 in shell 1 and positioned at 2 upstream of vent gas treatment module.
It please join shown in Fig. 6 to Fig. 8, the shell 1 is substantially cylindrical comprising be located in the vent gas treatment module 2
First cavity 11 of trip, the positioned at second cavity 12 in 2 downstream of vent gas treatment module, in first cavity 11
One partition board 13 and the second partition 14 in second cavity 12.The first partition 13 divides first cavity 11
At the first cushion chamber 111 positioned at upstream and the second cushion chamber 112 positioned at downstream, the second partition 14 is by described second
Cavity 12 is divided into the third cushion chamber 121 positioned at upstream and the 4th cushion chamber 122 positioned at downstream.
It please join shown in Fig. 1 to Fig. 5, the shell 1 further includes the end cone 15 equipped with gas feed 151, in the end cone 15
Equipped with installing the mounting base 152 of urea nozzle.
Please join shown in Fig. 8, the two-layer hybrid pipe 3 includes inner tube 31, be sleeved on the periphery of said inner tube 31 outer tube 32 and
The coupling tube 33 being connected with said inner tube 31.Said inner tube 31 is cylindrical, penetrates through in an axial direction.Said inner tube 31 is included in institute
State the first end 311 being oppositely arranged in axial direction and second end 312.The outer tube 32 is cylindrical comprising in the axial direction
The third end 321 and the 4th end 322 being oppositely arranged, wherein the third end 321 is close to the first end 311, the 4th end
322 close to the second end 312.
The coupling tube 33 is equipped with the conical surface 331 and the edge being radially positioned between said inner tube 31 and the outer tube 32
The fitting surface 332 being axially inserted into the first end 311, the fitting surface 332 are welded with said inner tube 31.By by institute
Stating fitting surface 332 and being inserted into the first end 311 can make transition face more smooth, to reduce the risk of urea crystals.Institute
It states third end 321 to weld with the conical surface 332, to which the outer tube 32 to be fixed in the coupling tube 33.Scheme in the present invention
In the embodiment shown, the bottom of the conical surface 332 is equipped with several trepannings 333, the trepanning 333 and the urea nozzle phase
It is right.On the one hand this design can reduce the back pressure of system, on the other hand, once urea forms crystallization after the injection, be vented energy
Enough crystallization is taken away by the trepanning 333.
It please join shown in Fig. 8, the two-layer hybrid pipe 3 further includes being located at the 4th end 322 and to reflected gas stream
End plate 34.In illustrative embodiments of the present invention, the end plate 34 is the middle section of the first partition 13.Described second
End 312 is spaced a distance with the end plate 34 in the axial direction, and the end plate 34 is equipped with and is protruded out to the second end 312
Arc convex 341 and arc-shaped concave 342 positioned at the periphery of the arc convex 341.The center of the arc convex 341 with
The axis of said inner tube 31 is mutually aligned in the axial direction.It should be noted that by the way that arc convex 341 and arc is arranged
Concave surface 342 makes 34 undulate of the end plate, so as to play preferable flow-disturbing effect.In addition, the end plate 34 is also set
Have to position a step surface 343 at the 4th end 322, the outer tube 32 and the end plate 34 at the step surface 343 into
Row welding.Certainly, in order to which back pressure considers, an appropriate number of trepanning can also be opened up in the end plate 34.
It please join shown in Fig. 9 to Figure 11, the outer tube 32 includes 35 and second semicanal 36 of mutually matched first semicanal, institute
It states the first semicanal 35 and mutually staggers radially with second semicanal 36 to go out with second to form first outlet 350 in the circumferential
Mouthfuls 360, the first outlet 350 is opposite with the opening direction of the second outlet 360 forming exhaust eddy flow.
Specifically, first semicanal 35 include the first curved pipe 351 and be connected with first curved pipe 351 the
One wall extension 352, first curved pipe 351 are equipped with first end 353, and first wall extension 352 is equipped with second end
354.Similarly, second semicanal 36 includes the second curved pipe 361 and what is be connected with second curved pipe 361 second prolong
Wall 362 is stretched, second wall extension 362 is equipped with third end 363, and second curved pipe 361 is equipped with the 4th end 364.Institute
Second end 354 is stated to be located at the outside of the 4th end 364 and extend beyond the 4th end 364 in the circumferential, it is described
Third end 363 is located at the outside of the first end 353 and extends beyond the first end 353 in the circumferential.Described
One end 353 is located at the first end 353 and the third end close to the third end 363, the first outlet 350
Between 363.The second end 354 is located at the second end 354 close to the 4th end 364, the second outlet 360
Between the 4th end 364.
It please join shown in Fig. 6 to Fig. 8, the two-layer hybrid pipe 3 is located in first cushion chamber 111.The first partition
13 parts for corresponding to other than the two-layer hybrid pipe 3 be equipped with several first through hole 131 with by first cushion chamber 111 with it is described
Second cushion chamber 112 is connected to.
The exhaust gas treatment device 100 further includes across the second partition 14 and extending into the third cushion chamber 121
Interior outlet 16, the second partition 14 are equipped with several second through-holes 141 with by the third cushion chamber 121 and the described 4th
Cushion chamber 122 is connected to.The outlet 16 is additionally provided with several ventholes 161 being connected with the 4th cushion chamber 122.At this
In invention embodiment illustrated, the exhaust gas treatment device 100 can play the role of purification exhaust and noise reduction simultaneously.It is excellent
Selection of land can fill silencing cotton, to improve the effect of noise reduction in the 4th cushion chamber 122.
It please join shown in Fig. 8 to Figure 11, the exhaust type of flow of the invention is as follows：
First, the exhaust of engine enters end cone 15 from the gas feed 151.Under the control of the controller, urea is molten
Liquid is atomised to by urea nozzle in the end cone 15, and is mixed with the exhaust.Then, it is vented the urine with atomization
Plain solution enters said inner tube 31 under the guiding of the coupling tube 33, is then left again from the second end 312 of said inner tube 31.
Due to the outer tube 32 the 4th end 322 substantially by the end plate 34 it is closed, exhaust get on the end plate 34 can be formed it is anti-
Stream.The exhaust mixture come out from the second end 312 of said inner tube 31 enters in the outer tube 32, and forms eddy flow, to increase
The stroke of air-flow in a limited space is added, has increased the distance of urea droplets evaporation, improve evaporation rate, improve mixing
Uniformity reduces the risk of urea crystals.
The first through hole 131 is passed through to enter second cushion chamber 112 by mixed exhaust mixture, then again
It is purified by vent gas treatment module 2.Finally, a part exhaust directly by third cushion chamber 121 enter outlet 16 after from
It opens；Another part is vented across second through-hole 141, is left after then entering outlet 16 from the venthole 161.
The two-layer hybrid pipe 3 of the present invention can improve the mixing uniformity of exhaust and urea liquid, net to improve exhaust
The efficiency of change reduces the risk of urea crystals.
In addition, above example is merely to illustrate the present invention and not limits technical solution described in the invention, to this
The understanding of specification should be based on person of ordinary skill in the field, although this specification is with reference to the above embodiments pair
Present invention has been detailed description, still, it will be understood by those of ordinary skill in the art that, the technology of technical field
Personnel still can modify or equivalently replace the present invention, and all do not depart from the technology of the spirit and scope of the present invention
Scheme and its improvement should all be covered in scope of the presently claimed invention.
Claims (8)
1. a kind of two-layer hybrid pipe, in engine exhaust treatment apparatus, the two-layer hybrid pipe includes inner tube, it is described to be sleeved on
The outer tube of inner tube periphery and the coupling tube being connected with said inner tube, it is characterised in that：Said inner tube includes circular peripheral wall, institute
It states and any perforation is not set on peripheral wall；Said inner tube penetrates through in an axial direction, and said inner tube includes being oppositely arranged in the axial direction
First end and second end, wherein the coupling tube is connected with the first end, the outer tube includes mutually matched first semicanal
And second semicanal, first semicanal are mutually staggered radially with second semicanal to form first outlet in the circumferential
With second outlet, the first outlet is opposite with the opening direction of the second outlet forming exhaust eddy flow, the outer tube
Include the third end that is oppositely arranged in the axial direction and the 4th end, wherein the third end is close to the first end, described the
Four ends are close to the second end；The two-layer hybrid pipe further includes being located at the 4th end and to the end plate of reflected gas stream,
The second end is spaced a distance with the end plate in the axial direction, and the end plate is equipped with and is protruded out to the second end
Arc convex；First semicanal includes the first end and second end for being located at both sides；Second semicanal includes
It is located at the third end and the 4th end of both sides；The first end is close to the third end, the first outlet
Between the first end and the third end；The second end is close to the 4th end, the second outlet
Between the second end and the 4th end；First semicanal include the first curved pipe and with first arc
The first connected wall extension of shape pipe, the first end are located on first curved pipe, and the second end is positioned at described the
On one wall extension；Second semicanal includes the second curved pipe and the second wall extension for being connected with second curved pipe, institute
It states third end to be located on second wall extension, the 4th end is located on second curved pipe；The second end
Positioned at the 4th end outside and extend beyond the 4th end in the circumferential, the third end be located at described first
The outside of end and the first end is extended beyond in the circumferential.
2. two-layer hybrid pipe as described in claim 1, it is characterised in that：The center of the arc convex and the axis of said inner tube
Line is mutually aligned in the axial direction, and the end plate is equipped with the arc-shaped concave positioned at arc convex periphery.
3. two-layer hybrid pipe as described in claim 1, it is characterised in that：The coupling tube, which is equipped with, to be radially positioned in described
Manage between the outer tube the conical surface and along the fitting surface being axially inserted into the first end, the fitting surface with it is described
Inner tube is welded.
4. two-layer hybrid pipe as claimed in claim 3, it is characterised in that：The third end is welded with the conical surface, the end
Plate is equipped with to position the step surface at the 4th end.
5. a kind of exhaust gas treatment device comprising shell and the vent gas treatment module being installed in the shell, the shell
Include the first cavity positioned at vent gas treatment module upstream and the second cavity positioned at the vent gas treatment module down-stream,
It is characterized in that：The exhaust gas treatment device further includes the two-layer hybrid pipe as described in any one of Claims 1-4 item,
The two-layer hybrid pipe is located in first cavity.
6. exhaust gas treatment device as claimed in claim 5, it is characterised in that：The shell includes the end equipped with gas feed
Cone, the end cone are equipped with to install the mounting base of urea nozzle, and the gas feed is connected to the coupling tube.
7. exhaust gas treatment device as claimed in claim 5, it is characterised in that：The exhaust gas treatment device further includes positioned at described
First partition in first cavity by first cavity to be divided into the first cushion chamber and the second cushion chamber, the two-layer hybrid
Pipe is located in first cushion chamber, and the vent gas treatment module is located at the downstream of the first partition and is buffered with described second
Chamber is connected, and the first partition corresponds to the part other than the two-layer hybrid pipe equipped with several first through hole to delay described first
Chamber is rushed to be connected to second cushion chamber.
8. exhaust gas treatment device as claimed in claim 5, it is characterised in that：The exhaust gas treatment device further includes positioned at described
Second partition in second cavity by second cavity to be divided into third cushion chamber and the 4th cushion chamber, the gas exhaust treatment
Device includes across the second partition and extending into the outlet in the third cushion chamber, and the second partition is equipped with several
The third cushion chamber to be connected to the 4th cushion chamber, the outlet is additionally provided with and the 4th buffering second through-hole
Several ventholes that chamber is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510243073.8A CN104832255B (en) | 2015-05-13 | 2015-05-13 | Two-layer hybrid pipe and its exhaust gas treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510243073.8A CN104832255B (en) | 2015-05-13 | 2015-05-13 | Two-layer hybrid pipe and its exhaust gas treatment device |
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| Publication Number | Publication Date |
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| CN104832255A CN104832255A (en) | 2015-08-12 |
| CN104832255B true CN104832255B (en) | 2018-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510243073.8A Active CN104832255B (en) | 2015-05-13 | 2015-05-13 | Two-layer hybrid pipe and its exhaust gas treatment device |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016180244A1 (en) * | 2015-05-13 | 2016-11-17 | 天纳克（苏州）排放系统有限公司 | Two-layer mixing tube and exhaust treatment apparatus having same |
| CN108266256A (en) * | 2017-12-13 | 2018-07-10 | 江苏多为泵业股份有限公司 | A kind of exhaust end cone |
| WO2019128163A1 (en) * | 2017-12-29 | 2019-07-04 | 天纳克（苏州）排放系统有限公司 | Tail gas after-treatment mixing apparatus and package thereof |
| CN108457727A (en) * | 2018-04-19 | 2018-08-28 | 凯德斯环保科技（苏州）有限公司 | SCR urea mixers |
| US10287948B1 (en) | 2018-04-23 | 2019-05-14 | Faurecia Emissions Control Technologies, Usa, Llc | High efficiency mixer for vehicle exhaust system |
| US10316721B1 (en) | 2018-04-23 | 2019-06-11 | Faurecia Emissions Control Technologies, Usa, Llc | High efficiency mixer for vehicle exhaust system |
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| CN103321724A (en) * | 2013-07-09 | 2013-09-25 | 潍柴动力股份有限公司 | SCR catalyzing silencer and hybrid tube device of SCR catalyzing silencer |
| WO2014172866A1 (en) * | 2013-04-25 | 2014-10-30 | Tenneco Automotive Operating Company Inc. | Perforated tube exhaust mixing device |
| CN104594990A (en) * | 2015-02-27 | 2015-05-06 | 天纳克（苏州）排放系统有限公司 | Hybrid tube and exhaust gas treatment device |
| CN204646381U (en) * | 2015-05-13 | 2015-09-16 | 天纳克（苏州）排放系统有限公司 | Two-layer hybrid pipe and exhaust gas treatment device thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9314750B2 (en) * | 2013-05-07 | 2016-04-19 | Tenneco Automotive Operating Company Inc. | Axial flow atomization module |
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2015
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| WO2014172866A1 (en) * | 2013-04-25 | 2014-10-30 | Tenneco Automotive Operating Company Inc. | Perforated tube exhaust mixing device |
| CN103321724A (en) * | 2013-07-09 | 2013-09-25 | 潍柴动力股份有限公司 | SCR catalyzing silencer and hybrid tube device of SCR catalyzing silencer |
| CN104594990A (en) * | 2015-02-27 | 2015-05-06 | 天纳克（苏州）排放系统有限公司 | Hybrid tube and exhaust gas treatment device |
| CN204646381U (en) * | 2015-05-13 | 2015-09-16 | 天纳克（苏州）排放系统有限公司 | Two-layer hybrid pipe and exhaust gas treatment device thereof |
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| CN104832255A (en) | 2015-08-12 |
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