CN204941659U - For using the mixer of the tail gas discharging pipe of the machine of diesel engine and using the machine of diesel engine - Google Patents
For using the mixer of the tail gas discharging pipe of the machine of diesel engine and using the machine of diesel engine Download PDFInfo
- Publication number
- CN204941659U CN204941659U CN201520619522.XU CN201520619522U CN204941659U CN 204941659 U CN204941659 U CN 204941659U CN 201520619522 U CN201520619522 U CN 201520619522U CN 204941659 U CN204941659 U CN 204941659U
- Authority
- CN
- China
- Prior art keywords
- mixer
- tail gas
- discharging pipe
- gas discharging
- diesel engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model provides a kind of and it is characterized in that for using the mixer of the tail gas discharging pipe of the machine of diesel engine, and described mixer comprises the circumferential portion being applicable to assembling matchingly with the inwall of described tail gas discharging pipe; And to extend and relative to multiple blades of described circumferential portion deviation from described circumferential portion.The utility model also provides a kind of machine being provided with the use diesel engine of described mixer.According to the utility model, can avoid forming crystalline material on the mixer region of the near-wall of tail gas discharging pipe, thus prevent or delay the obstruction of tail gas discharging pipe.
Description
Technical field
The utility model relates to the exhaust emissions of the machine using diesel engine, particularly relates to the mixer of the tail gas discharging pipe of the machine for using diesel engine.
Background technique
Diesel engine is widely used in the machines such as small-sized, heavy or large vehicle, boats and ships, generator and military tanks owing to having the characteristics such as the high and output torque of good reliability, the thermal efficiency is large.Owing to having the nitrogen oxide of high level in the tail gas of diesel engine emissions, just can be discharged in air after needing, by special airborne exhaust treatment system, process is carried out to tail gas.A kind of effective technology processed the tail gas of diesel engine emissions adopts selective catalytic reduction (SCR) method to reduce the content of the nitrogen oxide in tail gas of diesel engine emissions.Selective catalytic reduction (SCR) method is by being ejected on the mixer that is arranged in tail gas discharging pipe by aqueous solution of urea, the blade on aqueous solution of urea and mixer collides and is cracked into small particle and pyrolysis produces ammonia.Under the effect of the catalyzer in catalyst converter, conversion of nitrogen oxides harmful in the tail gas of diesel engine emissions is harmless nitrogen and water vapour as reducing agent by ammonia.Thus, airborne exhaust treatment system generally including injection apparatus for spraying aqueous solution of urea, being arranged on the mixer in tail gas discharging pipe and being arranged in tail gas discharging pipe and being positioned at the catalyst converter in mixer downstream.
Fig. 1 show schematically show the existing mixer be arranged in tail gas discharging pipe.As shown in Figure 1, the vertical metal bar 5 with blade 3 is normally become grid-like discoid pieces with transverse metal bar 7 cross weld and makes by existing mixer 1.When the mixer of the grid-like discoid pieces of this one-tenth is arranged in tail gas discharging pipe 9, most of blade is all positioned at the position of the tube wall away from tail gas discharging pipe.When diesel engine is run, the temperature in the near-wall region of tail gas discharging pipe can be lower relative to the temperature of the center region of tail gas discharging pipe, the aqueous solution of urea be injected in the near-wall region of tail gas discharging pipe fully can not be cracked into particulate due to effective shock of the blade on shortage and mixer, this will cause aqueous solution of urea can not be become ammonia by pyrolysis fully, thus form crystalline material on the mixer region of the near-wall of tail gas discharging pipe.Compared with diesel engine is run with high load operating mode, when diesel engine is run with running on the lower load, the exhaust temperature of discharge is lower, and the situation forming crystalline material is more serious.When crystalline material to a certain extent time, crystalline material on mixer will block discharge pipe, and cause diesel engine back pressure to raise, exhaust emissions is more deteriorated, and then cause airborne exhaust emissions diagnostic system to be reported to the police, thus make the output torque of control system volitional check diesel engine.In addition, in order to blade-carrying metal bar cross weld is become grid-like discoid pieces, need to hold another metal strip as the slot of vertical metal bar 5 at some metal strip as transverse metal bar 7 pre-sets, then the metal bar be plugged in together is welded at multiple position.Metal strip manufacturing process more complicated, the cost of the grid-like discoid pieces of this one-tenth are higher.
Thus, need to improve the mixer of the existing tail gas discharging pipe for using the machine of diesel engine.
Model utility content
An object of the present utility model is exactly the mixer of the tail gas discharging pipe of the machine for using diesel engine that will propose a kind of improvement, and this mixer can be avoided forming crystalline material on the mixer region of the near-wall of tail gas discharging pipe.
For this reason, according to one side of the present utility model, provide a kind of and it is characterized in that for using the mixer of the tail gas discharging pipe of the machine of diesel engine, described mixer comprises:
Be applicable to the circumferential portion of assembling matchingly with the inwall of described tail gas discharging pipe; And
To extend and relative to multiple blades of described circumferential portion deviation from described circumferential portion.
Preferably, described mixer also comprises at least one central projection extended towards the center of described circumferential portion from described circumferential portion and at least one additional blades extended from described central projection.
Preferably, described mixer comprises first portion and second portion, described first portion comprises the first circumferential portion of being applicable to assembling matchingly with the inwall of described tail gas discharging pipe and to extend and relative to multiple first blades of described first circumferential portion deviation from described first circumferential portion, and described second portion comprises and being applicable to and the second circumferential portion that the inwall of described tail gas discharging pipe assembles matchingly and extending and relative to multiple second blades of described second circumferential portion deviation from described second circumferential portion.
Preferably, described first portion and described second portion are coupled together by intermediate portion.
Preferably, described first portion also comprises at least one first central projection extended towards the center of described first circumferential portion from described first circumferential portion and at least one first additional blades extended from described first central projection.
Preferably, described second portion also comprises at least one second central projection extended towards the center of described second circumferential portion from described second circumferential portion and at least one second additional blades extended from described second central projection.
Preferably, described first portion and described second portion stagger mutually along the central axial direction of described mixer.
Preferably, described first portion is overlapping on the direction upper part ground vertical with the central axial direction of described mixer with described second portion.
Preferably, described first portion and described second portion in the same plane along the central axial direction of described mixer.
Preferably, described mixer is by having main part and carrying out doubling to described blank subsequently and bending is formed from the blank of multiple tabs of described main part side extending by metal sheet punching press or cut into.
According to another aspect of the present utility model, a kind of machine using diesel engine is provided, it is characterized in that, in the tail gas discharging pipe of described machine, be provided with mixer as above.
According to of the present utility model for using the mixer of the tail gas discharging pipe of the machine of diesel engine, owing to having the blade of the circumferential portion extension arranged from the tube wall of next-door neighbour's tail gas discharging pipe, even if the aqueous solution of urea jet being injected into the near-wall region of tail gas discharging pipe also can effectively clash into the blade on mixer and is fully cracked into particulate, and become ammonia by pyrolysis fully, thus can avoid forming crystalline material on the mixer region of the near-wall of tail gas discharging pipe, and then prevent or delay the obstruction of discharge pipe.
Accompanying drawing explanation
Fig. 1 show schematically show the existing mixer be arranged in tail gas discharging pipe;
Fig. 2 is for using the schematic isometric of the mixer of the tail gas discharging pipe of the machine of diesel engine according to of the present utility model;
Fig. 3 is the plan view of mixer shown in Fig. 2;
Fig. 4 is the side view of mixer shown in Fig. 2;
Fig. 5 is the schematic diagram of the blank of the various piece for the preparation of mixer shown in Fig. 2 be made up of metal sheet; And
Fig. 6 show schematically show be arranged in tail gas discharging pipe according to mixer of the present utility model.
Embodiment
Each preferred embodiment of the present utility model is described in detail below in conjunction with example.It will be understood by those skilled in the art that these embodiments are exemplary, it does not also mean that and forms any restriction to the utility model.
Fig. 2 is that Fig. 3 is the plan view of mixer shown in Fig. 2 according to of the present utility model for using the schematic isometric of the mixer of the tail gas discharging pipe of the machine of diesel engine, and Fig. 4 is the side view of mixer shown in Fig. 2.As in Figure 2-4, according to of the present utility model for using the mixer 10 of the tail gas discharging pipe of the machine of diesel engine to comprise first portion 13 and second portion 15.First portion 13 comprises the first circumferential portion 13a of being applicable to matching with the inwall of discharge pipe and to extend and relative to multiple first blade 13b of the first circumferential portion 13a deviation from the first circumferential portion 13a.Each first blade 13b relative to direction and the angle Selection of the first circumferential portion 13a deviation become to make the first blade 13b be not only applicable to aqueous solution of urea be injected into above there is effective collision and be cracked into particulate, but also be suitable for guiding air-flow to be smoothly through mixer 10 with proper flow rates.Preferably, adjacent first blade of spaced first blade is that identical deviation angle is by deviation relative to the first circumferential portion 13a.In a preferred embodiment, the first circumferential portion 13a semicircular in shape substantially of first portion 13, to be arranged in cross section discharge pipe rounded substantially.It should be understood that the shape of cross section of discharge pipe will be arranged on wherein according to mixer 10, the first circumferential portion 13a of first portion 13 can have other suitable shape matched with discharge pipe.Such as, when the shape of cross section of discharge pipe is oval, the first circumferential portion 13a of first portion 13 can be half elliptic substantially; Or when the shape of cross section of discharge pipe is square, the first circumferential portion 13a of first portion 13 also can be square substantially.First portion 13 can also comprise at least one first central projection 13c extended towards the center of the first circumferential portion 13a from the first circumferential portion 13a and at least one the first additional blades 13d extended from the first central projection 13c towards the first circumferential portion 13a.In a preferred embodiment, first portion 13 comprise from the first circumferential portion 13a towards the center of the first circumferential portion 13a extend a first central projection 13c and from the first central projection 13c both sides respectively towards first circumferential portion 13a extend two the first additional blades 13d.
Similarly, second portion 15 comprises the second circumferential portion 15a of being applicable to matching with the inwall of discharge pipe and to extend and relative to multiple second blade 15b of the second circumferential portion 15a deviation from the second circumferential portion 15a.Each second blade 15b relative to direction and the angle Selection of the second circumferential portion 15a deviation become to make the second blade 15b be not only applicable to aqueous solution of urea be injected into above there is effective collision and be cracked into particulate, but also be suitable for guiding air-flow to be smoothly through mixer 10 with proper flow rates.Preferably, the second adjacent blade of spaced second blade is that identical deviation angle is by deviation relative to the second circumferential portion 15a.In a preferred embodiment, the second circumferential portion 15a semicircular in shape substantially of second portion 15, to be arranged in cross section discharge pipe rounded substantially.It should be understood that the shape of cross section of discharge pipe will be arranged on wherein according to mixer 10, the second circumferential portion 15a of second portion 15 can have other suitable shape matched with discharge pipe.Such as, when the shape of cross section of discharge pipe is oval, the second circumferential portion 15a of second portion 15 can be half elliptic substantially; Or when the shape of cross section of discharge pipe is square, the second circumferential portion 15a of second portion 15 also can be square substantially.Second portion 15 can also comprise at least one second central projection 15c extended towards the center of the second circumferential portion 15a from the second circumferential portion 15a and at least one the second additional blades 15d extended from the second central projection 15c towards the second circumferential portion 15a.In a preferred embodiment, second portion 15 comprises the second central projection 15c extended towards the center of the second circumferential portion 15a from the second circumferential portion 15a and two the second additional blades 15d extended towards second week to portion 15a respectively from the second central projection 15c both sides.
According to preferred embodiment of the present utility model, first portion 13 and second portion 15 stagger mutually along the central axial direction of mixer 10, as shown in Figure 4.In this case, first portion 13 and second portion 15 can be linked into an integrated entity by joint 17.When first portion 13 and second portion 15 stagger mutually along the central axial direction of mixer 10, first portion 13 can be overlapping on the direction upper part ground vertical with the central axial direction of mixer 10 with second portion 15, and joining position to prevent injected aqueous solution of urea in first portion 13 and second portion 15 can not strike on blade effectively.But it should be understood that to form substantial circular shape be also feasible along the central axial direction of mixer 10 is substantially in the same plane for first portion 13 and second portion 15.
Fig. 5 is the schematic diagram of the blank of the various piece for the preparation of mixer shown in Fig. 2 be made up of metal sheet.As shown in Figure 5, metal sheet can be formed as the blank 20 with main part 20a and the multiple tab 20b from main part 20a side extending by the known molding mode such as punching press or shearing.Subsequently by blank 20 from intermediate portion doubling, the section with free end of each part in two parts then blank 20 be folded to form again is bent into arc-shaped from desired location.Subsequently, the multiple tab 20b in the blank 20 of doubling and bending are bent with required angle and direction, thus the final part forming mixer.In a part of the mixer formed like this, main part 20a in blank 20 corresponds to the first circumferential portion 13a of first portion 13 of mixer 10 or the second circumferential portion 15a of the second portion 15 of mixer 10, the multiple tab 20b in blank 20 and corresponds to the first blade 13b of first portion 13 of mixer 10 and the second blade 15b of the second portion 15 of the first additional blades 13d or mixer 10 and the second additional blades 15d.If needed, the section be not bent of two parts that blank 20 is folded to form can be welded by single-point simply, to guarantee that the part of formed mixer can not be out of shape.Two parts of the mixer of such formation can be welded together by means of joint 17.Joint 17 can be the part in a part of formed mixer, also can be independent parts.It should be understood that, when the various piece of mixer does not comprise central projection, blank 20 does not need carry out doubling and be directly bent into arc-shaped.Can be made by punching press or shearing, doubling, bending and a small amount of welding according to mixer of the present utility model, thus manufacturing process is simple, can significantly reduce costs.
Fig. 6 show schematically show be arranged in tail gas discharging pipe according to mixer of the present utility model.As shown in Figure 6, be installed according to mixer 10 of the present utility model in the tail gas discharging pipe 19 of the machine using diesel engine, in tail gas discharging pipe 19, the upstream of mixer 10 is provided with injection apparatus 21.Injection apparatus 21 is for being obliquely ejected into mixer 10 with pattern relative to the axis of tail gas discharging pipe 19 by aqueous solution of urea.Because mixer 10 of the present utility model has the blade of the circumferential portion extension arranged from the tube wall of next-door neighbour's tail gas discharging pipe 19, even if the aqueous solution of urea jet S1 being injected into the near-wall region of tail gas discharging pipe also can effectively clash into the blade on mixer and is fully cracked into particulate, and become ammonia by pyrolysis fully, thus can avoid forming crystalline material on the mixer region of the near-wall of tail gas discharging pipe, and then prevent or delay the obstruction of tail gas discharging pipe.In addition, compared with the situation that two parts of mixer 10 are substantially in the same plane, when two parts of mixer 10 offset from each other, the aqueous solution of urea jet S2 be ejected in the first portion 13 of the mixer 10 being positioned at top position can have larger impact area on blade, this is fully cracked into particulate by contributing to aqueous solution of urea further and is become ammonia, to prevent from forming crystalline material on the mixer and to improve vent gas treatment efficiency by pyrolysis fully.
Below in conjunction with specific embodiments the utility model has been described in detail.Obviously, above description and embodiment illustrated in the accompanying drawings all should be understood to be exemplary, and do not form restriction of the present utility model.To those skilled in the art, can carry out various modification or amendment when not departing from spirit of the present utility model to it, these modification or amendment all do not depart from scope of the present utility model.
Claims (10)
1. for using a mixer for the tail gas discharging pipe of the machine of diesel engine, it is characterized in that, described mixer comprises:
Be applicable to the circumferential portion of assembling matchingly with the inwall of described tail gas discharging pipe; And
To extend and relative to multiple blades of described circumferential portion deviation from described circumferential portion.
2. according to claim 1 for using the mixer of the tail gas discharging pipe of the machine of diesel engine, it is characterized in that, described mixer also comprises at least one central projection extended towards the center of described circumferential portion from described circumferential portion and at least one additional blades extended from described central projection.
3. according to claim 1 for using the mixer of the tail gas discharging pipe of the machine of diesel engine, it is characterized in that, described mixer comprises first portion (13) and second portion (15), described first portion (13) comprises the first circumferential portion (13a) of being applicable to assembling matchingly with the inwall of described tail gas discharging pipe and to extend and relative to multiple first blades (13b) of described first circumferential portion (13a) deviation from described first circumferential portion (13a), described second portion (15) comprises the second circumferential portion (15a) of being applicable to assembling matchingly with the inwall of described tail gas discharging pipe and to extend and relative to multiple second blades (15b) of described second circumferential portion (15a) deviation from described second circumferential portion (15a).
4. according to claim 3 for using the mixer of the tail gas discharging pipe of the machine of diesel engine, it is characterized in that, described first portion (13) and described second portion (15) are coupled together by intermediate portion (17).
5. according to claim 3 for using the mixer of the tail gas discharging pipe of the machine of diesel engine, it is characterized in that, described first portion (13) also comprises at least one first central projection (13c) extended towards the center of described first circumferential portion (13a) from described first circumferential portion (13a) and at least one first additional blades (13d) extended from described first central projection (13c).
6. according to claim 3 for using the mixer of the tail gas discharging pipe of the machine of diesel engine, it is characterized in that, described second portion (15) also comprises at least one second central projection (15c) extended towards the center of described second circumferential portion (15a) from described second circumferential portion (15a) and at least one second additional blades (15d) extended from described second central projection (15c).
7. according to claim 3 for using the mixer of the tail gas discharging pipe of the machine of diesel engine, it is characterized in that, described first portion (13) and described second portion (15) stagger mutually along the central axial direction of described mixer.
8. according to claim 7 for using the mixer of the tail gas discharging pipe of the machine of diesel engine, it is characterized in that, described first portion (13) is overlapping on the direction upper part ground vertical with the central axial direction of described mixer with described second portion (15).
9. according to claim 3 for using the mixer of the tail gas discharging pipe of the machine of diesel engine, it is characterized in that, described first portion (13) and described second portion (15) in the same plane along the central axial direction of described mixer.
10. use a machine for diesel engine, it is characterized in that, be provided with in the tail gas discharging pipe of described machine as arbitrary in claim 1-9 as described in mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520619522.XU CN204941659U (en) | 2015-08-17 | 2015-08-17 | For using the mixer of the tail gas discharging pipe of the machine of diesel engine and using the machine of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520619522.XU CN204941659U (en) | 2015-08-17 | 2015-08-17 | For using the mixer of the tail gas discharging pipe of the machine of diesel engine and using the machine of diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204941659U true CN204941659U (en) | 2016-01-06 |
Family
ID=55009098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520619522.XU Active CN204941659U (en) | 2015-08-17 | 2015-08-17 | For using the mixer of the tail gas discharging pipe of the machine of diesel engine and using the machine of diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204941659U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285852A (en) * | 2016-10-24 | 2017-01-04 | 广州汽车集团股份有限公司 | Exhaust gas treatment device for motor vehicles |
| CN111005789B (en) * | 2019-12-27 | 2024-04-16 | 清华大学苏州汽车研究院（吴江） | Urea SCR mixer, tail gas aftertreatment system and diesel vehicle |
-
2015
- 2015-08-17 CN CN201520619522.XU patent/CN204941659U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285852A (en) * | 2016-10-24 | 2017-01-04 | 广州汽车集团股份有限公司 | Exhaust gas treatment device for motor vehicles |
| CN111005789B (en) * | 2019-12-27 | 2024-04-16 | 清华大学苏州汽车研究院（吴江） | Urea SCR mixer, tail gas aftertreatment system and diesel vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8302391B2 (en) | Mixing and/or evaporating device and process for manufacturing same | |
| JP5155728B2 (en) | Mixing and / or vaporizing apparatus and manufacturing method thereof | |
| CN202181942U (en) | Exhaust system for engine | |
| KR101416478B1 (en) | Mixing module for post treatment exhaust contamination gas decreasing system in diesel engine | |
| US8800276B2 (en) | Mixing system | |
| CN102597446B (en) | Exhaust mixer | |
| EP2098697B1 (en) | Exhaust system of an internal combustion engine | |
| CN109415964B (en) | Mixer device for an exhaust gas aftertreatment system of a motor vehicle, exhaust gas aftertreatment system and motor vehicle | |
| CN102022165B (en) | Hybrid unit of SCR (selective catalytic reduction) system for vehicle urea | |
| US9302223B2 (en) | Mixing element | |
| MX2014010485A (en) | Device for exhaust purification. | |
| CN104024596A (en) | Exhaust gas purification device | |
| US10371032B2 (en) | Exhaust gas purifier for engine | |
| CN105257377A (en) | SCR after-treatment packaging structure for diesel engine | |
| US20140286832A1 (en) | Exhaust system | |
| CN105201604A (en) | Urea mixer of SCR system | |
| EP3566765A1 (en) | Compact exhaust mixing system | |
| CN204941659U (en) | For using the mixer of the tail gas discharging pipe of the machine of diesel engine and using the machine of diesel engine | |
| CN201902251U (en) | Mixing device of automobile-used urea SCR system | |
| CN203584530U (en) | Static mixing system for SCR (Selective Catalytic Reduction) post-treatment system | |
| JP2018109406A (en) | Exhaust gas device | |
| KR101837555B1 (en) | SCR Mixer And SCR Apparatus Including The Same | |
| WO2020002990A2 (en) | Large engine mixer for exhaust system | |
| KR101599838B1 (en) | Mixing apparatus for an exhaust after-treatment system of a vehicle | |
| KR101898235B1 (en) | Mixing apparatus for selective catalytic reduction-catalysator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 214028 No.17 Xinhua Road, national high tech Industrial Development Zone, Wuxi City, Jiangsu Province Patentee after: Bosch powertrain Co.,Ltd. Address before: 214028 No.17 Xinhua Road, national high tech Industrial Development Zone, Wuxi City, Jiangsu Province Patentee before: Bosch Automotive Diesel Systems Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |