CN215521023U - Side air inlet type compact air inlet mixing unit - Google Patents
Side air inlet type compact air inlet mixing unit Download PDFInfo
- Publication number
- CN215521023U CN215521023U CN202121717853.9U CN202121717853U CN215521023U CN 215521023 U CN215521023 U CN 215521023U CN 202121717853 U CN202121717853 U CN 202121717853U CN 215521023 U CN215521023 U CN 215521023U
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- CN
- China
- Prior art keywords
- air inlet
- partition plate
- holes
- mixing unit
- end cover
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- 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.)
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- 238000005192 partition Methods 0.000 claims abstract description 24
- 238000005452 bending Methods 0.000 claims abstract description 18
- 230000003647 oxidation Effects 0.000 claims abstract description 18
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 18
- 230000003197 catalytic effect Effects 0.000 claims abstract description 13
- 230000007704 transition Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 2
- 239000003054 catalyst Substances 0.000 description 6
- 230000006872 improvement Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Exhaust Gas After Treatment (AREA)
Abstract
The utility model relates to a side air inlet type compact air inlet mixing unit, which belongs to the technical field of diesel engine exhaust aftertreatment, and comprises a flange, an air inlet pipe and a cylinder body, wherein the top end of the cylinder body is sequentially welded with the air inlet pipe and the flange, an oxidation catalytic converter, a gasket, a bending partition plate and an air inlet end cover are arranged inside the cylinder body, the air inlet end cover is arranged at the lower part of the air inlet pipe, the air inlet end cover and a diesel oxidation catalytic converter are separated by the bending partition plate, the bending partition plate is provided with a plurality of first through holes and second through holes, the second through holes are arranged in the middle of the bending partition plate, the first through holes are arranged at the top and the bottom of the bending partition plate, the bending partition plate comprises a first folding edge and a second folding edge, and the angle formed by the two folding edges is alpha. The utility model adds the clapboard in the limited compact air inlet mixing space, so that the air flow is more fully mixed; the baffle gives consideration to the turbulence function, the complexity of the structure can be effectively reduced, meanwhile, the installation space is saved, the simplification of parts can be guaranteed, and the die sinking cost is reduced.
Description
Technical Field
The utility model relates to a side air inlet type compact air inlet mixing unit, and belongs to the technical field of diesel engine tail gas aftertreatment.
Background
With the increasingly stricter emission standards of national diesel vehicle tail gas pollutants, the use of post-treatment devices is indispensable for ensuring that each pollutant reaches the emission regulations of the corresponding stage. The DOC + DPF + SCR post-treatment route has become the first choice.
To match the loading boundary, it is often necessary to compress the size of the intake air mixing unit, resulting in insufficient mixing distance, and the uniformity index of the Diesel Oxidation Catalyst (DOC) is difficult to meet design requirements. Especially in the side structure of admitting air, when the air inlet pipeline is perpendicular with oxidation catalytic converter DOC and arranges, be subject to the arrangement space, traditional round hole pipe inlet structure is difficult to satisfy tight coupling design requirement. Therefore, developing an intake mixing unit which meets performance indexes and has a compact structure becomes a key design step of the side intake barrel type platform.
Disclosure of Invention
The utility model aims to provide an air inlet mixing unit which has a very compact structure and is as simple as possible under the condition of meeting the uniformity performance index of a Diesel Oxidation Catalyst (DOC), so that the development cost is reduced as much as possible, and the stable operation of the DOC is ensured.
According to the technical scheme provided by the utility model, the side-inlet compact type inlet air mixing unit comprises a flange, an inlet pipe and a barrel, wherein the inlet pipe and the flange are sequentially welded at the top end of the barrel, an oxidation catalytic converter, a gasket, a bent partition plate and an inlet end cover are arranged in the barrel, the inlet end cover is arranged at the lower part of the inlet pipe, the inlet end cover and a diesel oxidation catalytic converter are separated by the bent partition plate, the gasket is arranged at the bottom of the diesel oxidation catalytic converter, a plurality of first through holes and second through holes are formed in the bent partition plate, the second through holes are formed in the middle of the bent partition plate, the first through holes are formed in the top and the bottom of the bent partition plate, the bent partition plate comprises a first folded edge and a second folded edge, and the angle formed by the two folded edges is alpha.
As a further improvement of the utility model, the alpha angle ranges from 25 degrees to 30 degrees.
As a further improvement of the utility model, the periphery of the second folded edge is also provided with a folded edge.
As a further improvement of the utility model, two ends of the joint of the second folded edge and the first folded edge are provided with grooves.
As a further improvement of the utility model, the bottom of the air inlet end cover is in arc transition.
The utility model has the beneficial effects that:
1. the baffle plate is added in the limited compact air inlet mixing space, so that the air flow is mixed more fully.
2. The baffle gives consideration to the turbulence function, the complexity of the structure can be effectively reduced, meanwhile, the installation space is saved, the simplification of parts can be guaranteed, and the die sinking cost is reduced.
3. The turbulent flow effect manufactured by bending the partition board is very obvious, and the uniformity index of the oxidation catalytic converter (DOC) is ensured.
Drawings
Fig. 1 is a sectional view of the overall structure of the present invention.
FIG. 2 is a schematic view of a folded baffle of the present invention.
Description of reference numerals: the device comprises a flange 1, an air inlet pipe 2, a cylinder 3, an oxidation catalytic converter 4, a gasket 5, a bent partition plate 6, a first through hole 61, a second through hole 62, a groove 63, a first folded edge 64, a second folded edge 65 and an air inlet end cover 7.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in the figure, the side-inlet type compact inlet air mixing unit comprises a flange 1, an inlet pipe 2 and a cylinder 3, the top end of the cylinder body 3 is sequentially welded with an air inlet pipe 2 and a flange 1, the inside of the cylinder body 3 is provided with an oxidation catalytic converter 4, a gasket 5, a bent clapboard 6 and an air inlet end cover 7, it is characterized in that the air inlet end cover 7 is arranged at the lower part of the air inlet pipe 2, the air inlet end cover 7 and the diesel oxidation catalyst 4 are separated by a bending clapboard 6, the bottom of the diesel oxidation catalyst 4 is provided with a gasket 5, the bent clapboard 6 is provided with a plurality of first through holes 61 and second through holes 62, wherein the second through hole 62 is arranged in the middle of the bending clapboard 6, the first through hole 61 is arranged at the top and the bottom of the bending clapboard 6, the bending partition 6 includes a first folded edge 64 and a second folded edge 65, and the angle formed by the two folded edges is α.
The angle alpha ranges from 25 deg. to 30 deg. for better guiding the air flow.
The diameter of the first through hole 61 at the top is 8mm, the number of the first through holes is 25-28, the first through holes are symmetrically and uniformly distributed along the central line, and the total effective flow area is 1260-1400 mm2(ii) a The diameter of the second through hole 62 is 11mm, and the flow area is 5700mm2The number of the first through holes 61 at the bottom is 50-56, and the effective flow area is 2500-2800 mm2。
The periphery of the second folded edge 65 is also provided with a folded edge, and two ends of the joint of the second folded edge 65 and the first folded edge 64 are provided with grooves 63 for ensuring the positioning and welding with the barrel 3.
The bottom of the air inlet end cover 7 is in arc transition, the air inlet end cover 7 is formed in a one-time stamping mode, the boss of 20 mm is formed in the center through stamping, and the end cover mainly has the effects that air inlet flow is buffered, and large eddy is prevented from being generated.
The diesel oxidation catalyst is DOC, which is a common module for automobile exhaust treatment. The working range of the diesel engine is about 260-280 ℃, the temperature of the diesel engine is almost equal to the temperature of exhaust gas, a carrier with a small-hole channel is arranged inside the diesel engine, and catalysts such as palladium and platinum are coated on the inner wall of the small-hole channel.
The working principle of the utility model is as follows:
the air current enters into the mixing unit through intake pipe 2, because the water conservancy diversion effect of baffle 6 of bending, the air current falls into 2 ways: one air flow directly rushes to the lower part and is subjected to speed reduction and diffusion under the action of the cambered surface cache of the air inlet end cover 7, the air flow is further mixed through holes at the lower end of the bent partition plate 6, the other air flow is subjected to transition mixing through small holes 61 at the upper end of the bent partition plate and then is diffused along the axial direction, and the two air flows are converged through the bent partition plate 6 and are uniformly mixed before entering the oxidation catalytic converter 4.
Claims (5)
1. A side air inlet type compact air inlet mixing unit comprises a flange (1), an air inlet pipe (2) and a cylinder body (3), wherein the air inlet pipe (2) and the flange (1) are sequentially welded at the top end of the cylinder body (3), an oxidation catalytic converter (4), a gasket (5), a bending partition plate (6) and an air inlet end cover (7) are arranged inside the cylinder body (3), the side air inlet mixing unit is characterized in that the air inlet end cover (7) is arranged at the lower part of the air inlet pipe (2), the air inlet end cover (7) and the oxidation catalytic converter (4) are separated through the bending partition plate (6), the gasket (5) is arranged at the bottom of the oxidation catalytic converter (4), a plurality of first through holes (61) and second through holes (62) are arranged on the bending partition plate (6), the second through holes (62) are arranged in the middle of the bending partition plate (6), the first through holes (61) are arranged at the top and the bottom of the bending partition plate (6), the bending partition plate (6) comprises a first folding edge (64) and a second folding edge (65), and the angle formed by the two folding edges is alpha.
2. A side-entry compact intake-mixing unit according to claim 1, wherein the angle α is in the range of 25 ° to 30 °.
3. A side intake compact intake air mixing unit according to claim 1, wherein the second flange (65) is further provided with a flange on its outer periphery.
4. A side intake compact intake air mixing unit according to claim 3, wherein the second flange (65) is provided with a groove (63) at both ends of the junction with the first flange (64).
5. A side inlet compact inlet mixing unit according to claim 1, characterized in that the bottom of the inlet end cover (7) is in an arc transition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121717853.9U CN215521023U (en) | 2021-07-27 | 2021-07-27 | Side air inlet type compact air inlet mixing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121717853.9U CN215521023U (en) | 2021-07-27 | 2021-07-27 | Side air inlet type compact air inlet mixing unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215521023U true CN215521023U (en) | 2022-01-14 |
Family
ID=79787779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121717853.9U Active CN215521023U (en) | 2021-07-27 | 2021-07-27 | Side air inlet type compact air inlet mixing unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215521023U (en) |
-
2021
- 2021-07-27 CN CN202121717853.9U patent/CN215521023U/en active Active
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