CN212642843U - U-shaped mixer - Google Patents
U-shaped mixer Download PDFInfo
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- CN212642843U CN212642843U CN202021045862.3U CN202021045862U CN212642843U CN 212642843 U CN212642843 U CN 212642843U CN 202021045862 U CN202021045862 U CN 202021045862U CN 212642843 U CN212642843 U CN 212642843U
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Abstract
A U-shaped mixer comprises a mixing cavity bottom plate, a mixing cavity shell, a mixing assembly and a supporting bowl, wherein the mixing cavity shell is coated on the periphery of the mixing cavity bottom plate so as to form a mixing cavity on the inner side of the mixing cavity bottom plate, the mixing assembly is arranged in the mixing cavity and comprises an inner hole pipe extending up and down, a swirl pipe mixer is arranged on the outer edge of the upper portion of the inner hole pipe, an outer hole pipe is arranged on the outer edge of the middle lower portion of the inner hole pipe, the swirl pipe mixer, the inner hole pipe and the outer hole pipe form the mixing assembly in an inner and outer sleeve mode, a partition plate is arranged on the outer edge of the middle of the mixing assembly, the supporting bowl fixed in the mixing cavity shell is arranged at the bottom end of the mixing assembly, and the; therefore, the utility model discloses simple structure, convenient operation, the operation is maintained conveniently, and the evaporation of better promotion low operating mode urea and the formation of ammonia improve mixed effect, overcome prior art's defect.
Description
Technical Field
The utility model relates to a technical field of tail gas aftertreatment especially relates to a U type blender.
Background
In order to meet the requirements of the emission regulations of the national six-diesel vehicle, in the diesel exhaust aftertreatment technology, the DOC + DPF + SCR (diesel oxidation catalyst + diesel particulate filter + selective catalytic reduction) scheme has obvious advantages. The cylinder type or box type after-treatment design needs a proper mixing structure to promote the urea sprayed from a urea spraying system, such as the after-treatment system, to be evaporated, hydrolyzed and pyrolyzed into ammonia gas to participate in nitrogen oxide reaction, so that the pollution of nitrogen oxide to air is reduced, the urea solution is formed by mixing 32.5% of urea and aqueous solution, the evaporation, hydrolysis and pyrolysis processes of the urea solution are very complicated physical and chemical reactions, precipitates formed by intermediate products such as melamine and the like are generated if no effective mixing structure flows and is mixed in the process, secondary precipitates can be accumulated, the whole air flow channel can be blocked after a period of time, the after-treatment system fails, and a cab fault lamp is lighted, so that an engine cannot be started.
The prior art is a plate-type or fin-type mixed structure, which can not fully and completely utilize the exhaust energy of the engine, thereby easily causing crystallization precipitates with different degrees and causing poor mixing effect.
Therefore, the designer of the present invention, through careful research and design, has developed a U-shaped mixer to overcome the above-mentioned drawbacks by integrating the experience and achievement of related industries for many years.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a U type blender, its simple structure, convenient operation, the operation maintenance is convenient, and the evaporation of better promotion low operating mode urea and the formation of ammonia improve mixed effect, overcome prior art's defect.
In order to achieve the above object, the utility model discloses a U type blender, including mixing chamber bottom plate, mixing chamber casing, mixing assembly and support bowl, its characterized in that:
the upper portion of hybrid chamber bottom plate is equipped with the through-hole, and the lower part is equipped with down the through-hole, thereby the hybrid chamber is formed in the inboard of hybrid chamber bottom plate to the hybrid chamber casing cladding in the periphery of hybrid chamber bottom plate, be equipped with the hybrid module in the hybrid chamber, the hole pipe that extends about the hybrid module contains, a whirl pipe mixer and outer hole pipe from last to setting gradually outside the hole pipe down, thereby the interior mixed subassembly of sleeve pipe form inside and outside whirl pipe mixer, hole pipe and outer hole pipe formation, the centre of hybrid module is located to a baffle, the centre of baffle is equipped with the through-hole that supplies the hybrid module to wear to establish, the periphery of baffle supports in the inner wall of hybrid chamber bottom plate and hybrid chamber casing in order to separate whole hybrid chamber, support the bowl fixed to outer hole pipe and support in the bottom of hybrid module.
Wherein: the inner walls of the mixing cavity bottom plate and the mixing cavity shell are provided with accommodating grooves for supporting the periphery of the partition plate.
Wherein: the top of mixing assembly is equipped with nozzle holder base and nozzle holder flange, the top intermediate position of mixing chamber casing corresponds and is equipped with circular shape nozzle holder mounting hole and installs and fix a position for the nozzle.
Wherein: the swirl tube mixer is of a conical structure with a small upper end and a big lower end, and the lower end of the swirl tube mixer is connected to the upper end of the outer hole tube so as to form a certain gap between the outer hole tube and the inner hole tube.
Wherein: the periphery of swirl tube mixer is equipped with a plurality of whirl holes, and each whirl hole is equipped with the spinning disk that leans out the extension respectively.
Wherein: the swirl plate is directly and integrally formed on the swirl tube mixer.
Wherein: the periphery of the inner hole pipe is integrally provided with arrayed inner and outer through holes, and the periphery of the outer hole pipe is provided with a plurality of adjusting through holes.
Wherein: the mixing chamber shell comprises a mixing chamber inner shell, heat insulation cotton and a mixing chamber outer shell which are sequentially arranged from inside to outside.
Wherein: the peripheries of the upper through hole and the lower through hole extend outwards to form extending flanges so as to be convenient for installation and fixation.
Wherein: the support bowl is of a downward-sunken bowl-shaped structure, air ducts which outwards extend out of the outer side of the mixing assembly are formed in the two sides of the support bowl, and a plurality of adjusting through holes are formed in the two sides of the lower portion of the outer hole pipe respectively so as to be matched with the air ducts in the two sides to effectively adjust the flowing uniformity of air flow.
According to the structure, the utility model discloses a U type mixes the utensil has following effect:
1. the conical cyclone is adopted, so that the flow of the DPF with a large cross section can be converged into one pipe, the urea is promoted to be sprayed in the pipe to be evaporated, and the evaporation of the low-working-condition urea and the generation of ammonia are better promoted.
2. The array-shaped inner and outer through holes on the inner hole pipe can promote the evaporation of the urea solution and reduce the crystallization risk.
3. The lower parts of the two sides of the outer hole pipe are provided with adjusting through holes, so that the flow uniformity of the SCR inlet can be better adjusted.
4. The supporting bowl is heated all the time, the evaporation of urea is promoted, and the air ducts on the two sides can promote two air flows to be turned upwards out from the pipe, so that better mixing and heating effects are realized.
5. Simple structure, convenient operation and maintenance and wider application.
The details of the present invention can be obtained from the following description and the attached drawings.
Drawings
Fig. 1 shows the internal structure of the U-shaped mixer of the present invention.
Fig. 2 shows an exploded schematic view of the present invention.
Fig. 3A shows the internal gas flow diagram of the present invention.
Fig. 3B shows the external gas flow diagram of the present invention.
Reference numerals:
1. a mixing chamber floor; 2. a swirl tube mixer; 3. an inner bore tube; 4. a partition plate; 5. an outer bore tube; 6. a support bowl; 7. a mixing chamber inner shell; 8. heat insulation cotton; 9. a mixing chamber housing; 10. A nozzle holder base; 11. a nozzle carrier flange.
Detailed Description
Referring to fig. 1 and 2, a U-shaped mixer of the present invention is shown.
The U-shaped mixer comprises a mixing cavity bottom plate 1, a mixing cavity shell, a mixing assembly and a supporting bowl 6, wherein the upper part of the mixing cavity bottom plate 1 is provided with a circular (or other suitable shapes such as an ellipse) upper through hole, the lower part of the mixing cavity bottom plate 1 is provided with a circular (or other suitable shapes such as an ellipse) lower through hole, the peripheries of the upper through hole and the lower through hole extend outwards to form an extending flange so as to be convenient for installation and fixation, the mixing cavity shell is coated on the periphery of the mixing cavity bottom plate 1 to form a mixing cavity on the inner side of the mixing cavity bottom plate 1, the mixing assembly is arranged in the mixing cavity and comprises an inner hole pipe 3 extending upwards and downwards, the swirl pipe mixer 2 and the outer hole pipe are sequentially arranged on the outer edge of the inner hole pipe 3 from top to bottom, and therefore, the swirl pipe mixer 2, the inner hole pipe 3 and the outer hole pipe 5 form the mixing assembly in an inner sleeve and, the middle outer fringe of hybrid module is equipped with baffle 4, the centre of baffle 4 is equipped with the through-hole that supplies hybrid module to wear to establish, and its periphery supports in the inner wall of hybrid chamber bottom plate 1 and hybrid chamber casing in order to separate whole hybrid chamber, promotes gaseous entering hybrid module, wherein, the inner wall of hybrid chamber bottom plate 1 and hybrid chamber casing is equipped with the periphery of holding tank in order to support the baffle, hybrid module's bottom is equipped with the support bowl 6 that is fixed in the hybrid chamber casing, support bowl 6 weldable fixed to outer orifice pipe 5 and support in hybrid module's bottom to provide stable support, can also effectively absorb the thermal energy of outer orifice pipe simultaneously.
The top end of the mixing assembly is provided with a nozzle holder base 10 and a nozzle holder flange 11, and the middle position of the top of the mixing cavity shell is correspondingly provided with a circular nozzle holder mounting hole for mounting and positioning a nozzle.
Wherein, spiral-flow tube mixer 2 is big end down's awl tubular structure, and the lower extreme is connected to the upper end of outer hole pipe 5 to form certain clearance between outer hole pipe and hole pipe, spiral-flow tube mixer 2's periphery is equipped with a plurality of whirl holes, and each whirl hole is equipped with the spinning disk that leans out to extend respectively, the spinning disk can direct integrated into one piece on spiral-flow tube mixer 2, from this, through the toper structure of swirler and the whirl effect of spinning disk, can assemble a pipe to the flow of DPF large cross-section, impel urea injection evaporation in hybrid module, better promotion low operating mode urea's evaporation and the formation of ammonia.
Wherein, the whole inside and outside through-hole that is equipped with the array form on the periphery of interior hole pipe 3, suitable position on the periphery of outer hole pipe 4 is equipped with a plurality of regulation through-holes to the air current heating through the interior hole pipe, the evaporation of promotion urea solution that comes better reduces the crystallization risk, and the regulation through-hole position of outer hole pipe.
As shown in fig. 1, 2 and 3A, the support bowl 6 is a downward concave bowl-shaped structure, and is provided with air ducts at two sides thereof, the air ducts extend outward to the outside of the mixing assembly, so that the air flow of the mixing assembly directly impacts the concave part of the support bowl, the support bowl is always heated, evaporation of urea is promoted, the air ducts at two sides can promote two air flows to be turned upwards, and two sides of the lower part of the outer hole pipe 4 are respectively provided with a plurality of adjusting through holes, so that the flow uniformity of the SCR inlet air flow is realized by matching the air ducts at two sides.
Referring to fig. 1 and 2, the mixing chamber housing comprises a mixing chamber inner shell 7, a heat insulation cotton 8 and a mixing chamber outer shell 9 which are arranged in sequence from inside to outside.
The working principle of the U-shaped mixer can be seen in fig. 3A and 3B, airflow passes through a DPF carrier and then enters the conical swirl tube mixer, due to the action of the conical swirl tube mixer, the airflow enters the swirl tube mixer to generate swirl, the airflow generates uniform and rotary airflow to repeatedly heat the inner wall of the inner hole tube, and urea is sprayed into a solution in the swirl tube at high temperature to promote the evaporation of the urea to form ammonia gas, so that the crystallization risk is well reduced; the outer hole pipe is partially perforated, the purpose is to adjust the uniformity of ammonia gas before entering the SCR carrier, the structure is also one of the main structures for adjusting the back pressure of the mixer, and the purpose of reducing the back pressure is achieved through the number of the holes and the width of the bottom groove; airflow enters the supporting bowl through a gap between the inner hole pipe and the outer hole pipe, so that the supporting bowl at the bottom is in a state of being heated all the time, and evaporation of residual urea is promoted for the second time; then the airflow is guided by the cambered surfaces on the two sides of the supporting bowl, and the airflow turns upwards to enter the SCR carrier.
Therefore, the application has the advantages that:
1. the conical cyclone is adopted, so that the flow of the DPF with a large cross section can be converged into one pipe, the urea is promoted to be sprayed in the pipe to be evaporated, and the evaporation of the low-working-condition urea and the generation of ammonia are better promoted.
2. The array-shaped inner and outer through holes on the inner hole pipe can promote the evaporation of the urea solution and reduce the crystallization risk.
3. The lower parts of the two sides of the outer hole pipe are provided with adjusting through holes, so that the flow uniformity of the SCR inlet can be better adjusted.
4. The supporting bowl is heated all the time, the evaporation of urea is promoted, and the air ducts on the two sides can promote two air flows to be turned upwards out from the pipe, so that better mixing and heating effects are realized.
5. Simple structure, convenient operation and maintenance and wider application.
It is to be understood that the above description and illustrations are exemplary only and are not intended to limit the present disclosure, application, or uses. While embodiments have been described in the embodiments and depicted in the drawings, the present invention is not limited to the particular examples illustrated by the drawings and described in the embodiments as the best mode presently contemplated for carrying out the teachings of the present invention, and the scope of the present invention is intended to include any embodiments that fall within the foregoing description and the appended claims.
Claims (10)
1. The utility model provides a U type blender, includes mixing chamber bottom plate, mixing chamber casing, mixing assembly and support bowl, its characterized in that:
the upper portion of hybrid chamber bottom plate is equipped with the through-hole, and the lower part is equipped with down the through-hole, thereby the hybrid chamber is formed in the inboard of hybrid chamber bottom plate to the hybrid chamber casing cladding in the periphery of hybrid chamber bottom plate, be equipped with the hybrid module in the hybrid chamber, the hole pipe that extends about the hybrid module contains, a whirl pipe mixer and outer hole pipe from last to setting gradually outside the hole pipe down, thereby the interior mixed subassembly of sleeve pipe form inside and outside whirl pipe mixer, hole pipe and outer hole pipe formation, the centre of hybrid module is located to a baffle, the centre of baffle is equipped with the through-hole that supplies the hybrid module to wear to establish, the periphery of baffle supports in the inner wall of hybrid chamber bottom plate and hybrid chamber casing in order to separate whole hybrid chamber, support the bowl fixed to outer hole pipe and support in the bottom of hybrid module.
2. The U-shaped mixer of claim 1, wherein: the inner walls of the mixing cavity bottom plate and the mixing cavity shell are provided with accommodating grooves for supporting the periphery of the partition plate.
3. The U-shaped mixer of claim 1, wherein: the top of mixing assembly is equipped with nozzle holder base and nozzle holder flange, the top intermediate position of mixing chamber casing corresponds and is equipped with circular shape nozzle holder mounting hole and installs and fix a position for the nozzle.
4. The U-shaped mixer of claim 1, wherein: the swirl tube mixer is of a conical structure with a small upper end and a big lower end, and the lower end of the swirl tube mixer is connected to the upper end of the outer hole tube so as to form a certain gap between the outer hole tube and the inner hole tube.
5. The U-shaped mixer of claim 4, wherein: the periphery of swirl tube mixer is equipped with a plurality of whirl holes, and each whirl hole is equipped with the spinning disk that leans out the extension respectively.
6. The U-shaped mixer of claim 5, wherein: the swirl plate is directly and integrally formed on the swirl tube mixer.
7. The U-shaped mixer of claim 1, wherein: the periphery of the inner hole pipe is integrally provided with arrayed inner and outer through holes, and the periphery of the outer hole pipe is provided with a plurality of adjusting through holes.
8. The U-shaped mixer of claim 1, wherein: the mixing chamber shell comprises a mixing chamber inner shell, heat insulation cotton and a mixing chamber outer shell which are sequentially arranged from inside to outside.
9. The U-shaped mixer of claim 1, wherein: the peripheries of the upper through hole and the lower through hole extend outwards to form extending flanges so as to be convenient for installation and fixation.
10. The U-shaped mixer according to any one of claims 1-9, wherein: the support bowl is of a downward-sunken bowl-shaped structure, air ducts which outwards extend out of the outer side of the mixing assembly are formed in the two sides of the support bowl, and a plurality of adjusting through holes are formed in the two sides of the lower portion of the outer hole pipe respectively so as to be matched with the air ducts in the two sides to effectively adjust the flowing uniformity of air flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021045862.3U CN212642843U (en) | 2020-06-09 | 2020-06-09 | U-shaped mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021045862.3U CN212642843U (en) | 2020-06-09 | 2020-06-09 | U-shaped mixer |
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| Publication Number | Publication Date |
|---|---|
| CN212642843U true CN212642843U (en) | 2021-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021045862.3U Active CN212642843U (en) | 2020-06-09 | 2020-06-09 | U-shaped mixer |
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| CN (1) | CN212642843U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187590A (en) * | 2021-06-18 | 2021-07-30 | 潍柴动力股份有限公司 | Aftertreatment blender and engine U type aftertreatment system |
| CN113417724A (en) * | 2021-06-18 | 2021-09-21 | 潍柴动力股份有限公司 | SCR mixer and have its engine |
| WO2023000397A1 (en) * | 2021-07-19 | 2023-01-26 | 无锡威孚力达催化净化器有限责任公司 | Sleeve shunt-type urea mixing device |
-
2020
- 2020-06-09 CN CN202021045862.3U patent/CN212642843U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113187590A (en) * | 2021-06-18 | 2021-07-30 | 潍柴动力股份有限公司 | Aftertreatment blender and engine U type aftertreatment system |
| CN113417724A (en) * | 2021-06-18 | 2021-09-21 | 潍柴动力股份有限公司 | SCR mixer and have its engine |
| WO2023000397A1 (en) * | 2021-07-19 | 2023-01-26 | 无锡威孚力达催化净化器有限责任公司 | Sleeve shunt-type urea mixing device |
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Address after: 201815 area E, 2nd floor, building 3, No. 1180, Xingxian Road, Jiading Industrial Zone, Jiading District, Shanghai Patentee after: Puheim Automotive Technology (Shanghai) Co.,Ltd. Address before: 201815 area E, 2nd floor, building 3, No. 1180, Xingxian Road, Jiading Industrial Zone, Jiading District, Shanghai Patentee before: EBERSPACHER EXHAUST TECHNOLOGY (SHANGHAI) Co.,Ltd. |