CN115753319B - Air duct aerosol mixing device - Google Patents
Air duct aerosol mixing device Download PDFInfo
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- CN115753319B CN115753319B CN202211377795.9A CN202211377795A CN115753319B CN 115753319 B CN115753319 B CN 115753319B CN 202211377795 A CN202211377795 A CN 202211377795A CN 115753319 B CN115753319 B CN 115753319B
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- aerosol
- air duct
- pipeline
- gas
- mixer
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- 239000000443 aerosol Substances 0.000 title claims abstract description 100
- 238000009826 distribution Methods 0.000 claims abstract description 34
- 210000001503 joint Anatomy 0.000 claims abstract description 29
- 239000007921 spray Substances 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- 238000012360 testing method Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 10
- 238000005457 optimization Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
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- 230000003044 adaptive effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007706 flame test Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
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- 238000012795 verification Methods 0.000 description 1
Abstract
The invention provides an air duct aerosol mixer, which belongs to the technical field of test and test, and comprises a mixer main body and a butt joint, wherein the butt joint comprises two air duct butt joints and an aerosol conveying pipeline butt joint; the mixer body is of a T-shaped symmetrical structure, the two air duct butt joints are respectively connected with an air duct pipeline, and the aerosol conveying pipeline butt joint is connected with an aerosol conveying pipeline; the mixer main body comprises a gas collecting pipe and a gas distributing pipe; the gas collecting tube is integrally in a symmetrical structure and is arranged at the outer side of the mixer body along the axial direction of the air duct pipeline, and the gas collecting tube and the gas conveying pipeline are communicated with each other through a pipeline; the section of the airflow channel is in an inverted concave shape; the gas collecting tube is used for connecting a gas distributing tube; the gas-distributing pipe is hollow and tubular, one end is used for air inlet, and the other end is closed; the gas distribution pipe is provided with a plurality of spray holes along the length direction. The invention solves the problems that the existing aerosol mixing device has huge volume and can not improve the aerosol concentration and the flow velocity uniformity of the section of the air duct in a short distance.
Description
Technical Field
The invention belongs to the technical field of test and test, and particularly relates to an air duct aerosol mixer.
Background
The aerosol mixing means that specific aerosol in the air duct is stirred and mixed so that the aerosol is uniformly distributed on the section of the air duct. The aerosol mixing device is mainly applied to matching of filter detection equipment and calibration equipment of an aerosol monitoring instrument or a sensor.
The existing aerosol mixing device mainly adopts a single-point dust mode, and aerosol mixing is realized through turbulent flow of various mixing elements, wherein European and American air filter test tables use a combination of a mixing pore plate and a porous diffusion plate as a mixing device for wind speed and aerosol; the Japanese filtration unit test device adopts a reducing air pipe as an aerosol mixing device; the sodium flame test air duct in GB/T6165-2008 adopts a straight pipe section with the diameter of 5 times and a buffer box as an aerosol mixing device.
Although detection and test devices related to aerosol all put forward the standard of uniformly mixing aerosol, it is not clear whether the aerosol concentration is uniform or the air flow is uniform for the final realization of the mixing device, and in order to realize better mixing effect, the conventional mixing device mostly adopts the combination of a plurality of modes, and the size is huge, so that the whole system is huge in size. Therefore, the aerosol mixing device is optimized integrally, and the aerosol concentration and the flow velocity uniformity of the cross section of the air duct are still very necessary to be improved in a short distance.
The high-performance aerosol mixing device is important to the fields of high-efficiency filter test detection, aerosol photometer calibration, marine salt spray separation technology verification and the like, and needs to improve the existing aerosol mixing device, improve the integration degree, reduce the volume of the mixing device and improve the aerosol concentration and flow velocity uniformity of the section of an air duct in a short distance.
Disclosure of Invention
The invention provides an air duct aerosol mixing device, and aims to solve the problems that an existing aerosol mixing device is huge in size and cannot improve the concentration and flow speed uniformity of aerosol on the cross section of an air duct in a short distance.
The invention aims at realizing the following technical scheme:
An air duct aerosol mixer comprises a mixer body and a butt joint, wherein the butt joint comprises two air duct butt joints and an aerosol conveying pipeline butt joint; the mixer body is of a T-shaped symmetrical structure, two air duct butt joints are identical in specification and are coaxially arranged and are respectively detachably connected with air duct pipelines on two sides, and one air duct butt joint is arranged along the direction perpendicular to the axis of the air duct pipeline and is detachably connected with the air duct pipeline; the internal section of the part of the mixer body coaxially arranged along the air duct pipeline is identical to the internal section of the air duct pipeline in shape and size, the air duct opposite joint is identical to the air duct pipeline in specification, and the mixer body is detachably connected with the air duct pipeline through the air duct opposite joint; the internal section of the part, connected with the aerosol conveying pipeline, of the mixer body is identical to the internal section of the aerosol conveying pipeline in shape and size, the opposite joint of the aerosol conveying pipeline is identical to the joint specification of the aerosol conveying pipeline, and the mixer body is detachably connected with the aerosol conveying pipeline through the opposite joint of the aerosol conveying pipeline; the mixer main body comprises a gas collecting pipe and a gas distributing pipe; the gas collecting tube is integrally of a symmetrical structure, is arranged on the outer side of the mixer body along the axial direction of the air duct pipeline, is internally provided with a communicated airflow channel, is fixedly connected with the air duct pipeline and is isolated through the side wall; the gas collecting pipe and the aerosol conveying pipeline are communicated through a pipeline with the same shape and the same size as the internal section of the aerosol conveying pipeline; the section of the airflow channel is in an inverted concave shape; the gas collecting tube is used for connecting a gas distributing tube; the gas distribution pipes are hollow tubes with uniform cross section, one end of each gas distribution pipe is provided with gas inlet, the other end of each gas distribution pipe is closed, every two gas distribution pipes are arranged in parallel, and the gas inlets are staggered and respectively communicated with different sides of the gas collection pipe; the gas distribution pipes are provided with a plurality of groups, and the intervals between two adjacent groups are equal; the air distribution pipe is provided with a plurality of spray holes along the length direction, the opening direction of the spray holes is opposite to the incoming flow direction of the air channel, and aerosol is ejected into the air channel through the spray holes; the total area of the orifices of the injection holes is more than or equal to the cross-sectional area of the gas distributing pipe.
As further optimization, in the mixer main body, the equivalent diameter of two gas distribution pipes in the same group is 2 times of the interval between two adjacent groups.
As a further optimization, the injection holes are arranged in the vortex region of the gas-distributing pipe.
As further optimization, the side wall of the joint of the gas collecting tube and the air duct pipeline is shared.
As a further optimization, the aerosol delivery pipeline butt joint is positioned at the middle part of the gas collecting pipe.
As further optimization, the air duct butt joint adopts a flange plate structure, and the specification of the flange plate is consistent with that of the air duct pipeline.
As further optimization, the butt joint of the aerosol conveying pipeline adopts a flange structure, and the flange structure is consistent with the specification of the butt joint flange of the aerosol conveying pipeline.
The beneficial technical effects obtained by the invention are as follows:
Compared with the prior art, the integrated mixing device has the advantages of high integration, simple installation mode and the like, and solves the problem of huge volume of the existing mixing device. Through the design of the jet hole of the gas distribution pipe and the combined distribution of the gas distribution pipe, the beneficial technical effects of improving the aerosol concentration and the flow velocity uniformity of the section of the air channel in a short distance are realized, the problems that the existing aerosol mixing device is huge in size and can not improve the aerosol concentration and the flow velocity uniformity of the section of the air channel in a short distance are solved, and the device has outstanding substantive characteristics and remarkable progress.
Drawings
FIG. 1 is a schematic diagram of the interface configuration of an air duct aerosol mixer according to one embodiment of the present invention;
FIG. 2 is a schematic diagram of the internal structure of an air duct aerosol mixer according to one embodiment of the present invention;
FIG. 3 is a schematic flow diagram of the interior of a tunnel aerosol mixer according to one embodiment of the present invention;
Reference numerals: 1. a mixer body; 2. an air duct butt joint; 3. an aerosol delivery line interface; 4. a gas collecting tube; 5. an airflow channel; 6. a gas distribution pipe; 7. an injection hole; F. an aerosol carrier fluid.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the attached drawings and the detailed description. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention as claimed.
As shown in fig. 1-3, a specific embodiment of an air duct aerosol mixer comprises a mixer body 1 and a butt joint, wherein the butt joint comprises two air duct butt joints 2 and an aerosol conveying pipeline butt joint 3.
In this embodiment, the mixer body 1 is a T-shaped symmetrical structure, two air channels are identical in specification and coaxially arranged on the interface 2, and are detachably connected with air channel pipelines on two sides respectively, and one air channel is arranged on the interface 3 along the direction perpendicular to the axis of the air channel pipeline, and is detachably connected with the air channel pipeline.
In this embodiment, the internal cross section of the part of the mixer body 1 coaxially arranged along the air duct pipeline is identical to the internal cross section of the air duct pipeline in shape and size, the air duct opposite joint 2 adopts a flange structure, the specification of the flange of the interface of the air duct pipeline is identical to that of the flange of the interface of the air duct pipeline, and the mixer body 1 is detachably connected with the air duct pipeline through the air duct opposite joint 2. It should be noted that, if the air duct pipeline is in another form, the air duct should also make adaptive changes to the structure of the interface 2, but the purpose and effect are consistent, and there is no substantial difference from this embodiment.
In this embodiment, the internal section of the part of the mixer body 1 connected with the aerosol conveying pipeline is identical to the internal section of the aerosol conveying pipeline in shape and size, the interface 3 of the aerosol conveying pipeline adopts a flange structure, the specification of the flange of the interface of the aerosol conveying pipeline is identical to that of the flange of the interface of the aerosol conveying pipeline, and the mixer body 1 is detachably connected with the aerosol conveying pipeline through the interface 3 of the aerosol conveying pipeline. It should be noted that, if the interface of the aerosol delivery line adopts other forms, the aerosol delivery line should also adaptively change the structure of the interface 3, but the purpose and effect are consistent, and there is no substantial difference from this embodiment.
As shown in fig. 2, the mixer body 1 in this embodiment includes a gas collecting pipe 4 and a gas distributing pipe 6. The gas collecting tube 4 is integrally of a symmetrical structure, is axially arranged on the outer side of the mixer body 1 along the air duct pipeline, and is internally provided with a communicated airflow channel 5 which is fixedly connected with the air duct pipeline and is isolated through the side wall. The side wall of the joint of the gas collecting tube 4 and the air duct pipeline in the embodiment is shared, so that the weight of the structure can be further reduced, an independent structure can be adopted, the using effect is not affected, and only the assembly process and the equipment weight are different. The gas collecting tube 4 is communicated with the aerosol conveying pipeline opposite joint 3 through a pipeline which has the same internal cross section shape and the same size as the aerosol conveying pipeline. In this embodiment, the aerosol delivery pipeline opposite port 3 is located at the middle of the gas collecting tube 4, which is beneficial to uniform diffusion.
In this embodiment, the airflow channel 5 is mainly used for conveying aerosol carrier airflow, so that the airflow is uniformly ejected into the air duct after passing through the gas collecting tube 4 and the gas distributing tube 6. In this embodiment, the section of the airflow channel 5 is in an inverted concave shape, so that the aerosol current-carrying airflow can be uniformly distributed to two sides, the longitudinal uniform distribution in fig. 3 is realized, the transverse uniform distribution is realized through the air distribution pipe 6, and the effect of uniformly spraying into the air channel is finally realized.
The header 4 is used in this embodiment to connect the gas distribution pipe 6. The cross section area of the gas collecting tube 4 is larger, so that the flow speed of the internal gas flow can be reduced, the along-way resistance and the inertia influence of the gas flow are reduced, and the aerosol is uniformly distributed to the inlets of the gas distributing tubes 6 according to the flow route designed by the gas flow channel 5.
In this embodiment, the gas-distributing pipes 6 are hollow tubes with uniform cross section, wherein one end is air-in, the other end is closed, every two gas-distributing pipes 6 are in a group, are arranged in parallel, and the air inlets are staggered and respectively communicated with different sides of the gas-collecting pipe 4. The air distribution pipes 6 are provided with a plurality of groups, the distances between two adjacent groups are equal, and the specific number and the specific positions are determined according to the size of the air duct. The ratio of the equivalent diameter of two gas-dividing pipes 6 in each group to the spacing between the adjacent two groups is preferably 2. This ratio takes into account mainly two factors: firstly, preventing flow interference between adjacent gas distribution pipe groups when the distance is too close; secondly, the excessive distance is avoided, and the sufficient gas distribution pipe is ensured to be arranged on the section of the air duct.
The two gas distribution pipes 6 on the opposite side are in a group to ensure the dust generation uniformity along the length direction, the purpose of uniformly distributing the multi-component gas pipes 6 on the section of the air channel is to realize the uniform concentration mixing between the two adjacent gas distribution pipes 6 by utilizing the turbulent flow characteristic of the blunt body, thereby rapidly realizing the uniform concentration and flow velocity of aerosol on the section of the air channel in a short distance.
In this embodiment, the gas-distributing pipe 6 is provided with a plurality of injection holes 7 along the length direction, and aerosol is injected into the air duct from the injection holes 7, so as to achieve the multipoint dust effect on the cross section of the air duct, increase the initial contact area of the aerosol and air, reduce the mixing distance, and improve the uniformity of the cross section of the aerosol in the air duct. In this embodiment, the direction of the opening of the injection hole 7 is opposite to the direction of the incoming flow of the air duct, and the number, shape and spacing of the injection holes 7 are set according to actual needs. The number of injection holes 7 should be as large as possible, as the machining process allows, while satisfying that the total orifice area of the injection holes 7 is not smaller than the sectional area of the gas distribution pipe 6.
As shown in fig. 3, in this embodiment, the aerosol carrier fluid F enters the gas collecting tube 4 through the aerosol delivery pipeline opposite port 3, flows through the airflow channels 5 uniformly distributed on both sides, then enters the gas distributing tubes 6 distributed on both sides in a staggered manner, and finally is sprayed into the air duct from the spray holes 7, so as to realize the aerosol multipoint dust effect. In addition, the air duct fluid can generate vortex after passing through the outer surface of the air distribution pipe 6, and the injection hole 7 is positioned in the vortex area of the air distribution pipe 6, so that the mixing at the aerosol injection position is further realized, and the aerosol concentration and the flow velocity uniformity of the air duct section can be finally improved in a short distance.
The beneficial effects obtained by the embodiment are as follows:
Compared with the prior art, the integrated mixing device has the advantages of high integration, simple installation mode and the like, and solves the problem of huge volume of the existing mixing device. Through the design of the jet hole of the gas distribution pipe and the combined distribution of the gas distribution pipe, the beneficial technical effects of improving the aerosol concentration and the flow velocity uniformity of the section of the air channel in a short distance are realized, and compared with the prior art, the device has outstanding substantive characteristics and remarkable progress.
Claims (7)
1. The air duct aerosol mixer is characterized by comprising a mixer main body (1) and a butt joint, wherein the butt joint comprises two air duct butt joints (2) and an aerosol conveying pipeline butt joint (3);
The mixer body (1) is of a T-shaped symmetrical structure, two air duct butt joints (2) are identical in specification and are coaxially arranged and are respectively detachably connected with air duct pipelines on two sides, and one air duct butt joint (3) is arranged along the direction perpendicular to the axis of the air duct pipeline and is detachably connected with the air duct pipeline;
The internal section of the part of the mixer main body (1) coaxially arranged along the air duct pipeline is identical to the internal section of the air duct pipeline in shape and size, the air duct butt joint (2) is identical to the air duct pipeline in specification, and the mixer main body (1) is detachably connected with the air duct pipeline through the air duct butt joint (2);
The internal section of the part, connected with the aerosol conveying pipeline, of the mixer main body (1) is identical to the internal section of the aerosol conveying pipeline in shape and size, the interface specification of the aerosol conveying pipeline opposite interface (3) and the interface specification of the aerosol conveying pipeline are identical, and the mixer main body (1) is detachably connected with the aerosol conveying pipeline through the aerosol conveying pipeline opposite interface (3);
The mixer main body (1) comprises a gas collecting tube (4) and a gas distributing tube (6); the gas collecting tube (4) is integrally of a symmetrical structure, is arranged on the outer side of the mixer main body (1) along the axial direction of the air duct pipeline, and is internally provided with a communicated airflow channel (5) which is fixedly connected with the air duct pipeline and is isolated through the side wall; the gas collecting pipe (4) and the aerosol conveying pipeline opposite joint (3) are communicated through a pipeline with the same internal cross-sectional shape and the same size as the aerosol conveying pipeline;
The section of the airflow channel (5) is in an inverted concave shape; the gas collecting tube (4) is used for connecting a gas distributing tube (6); the gas distribution pipes (6) are hollow tubes with uniform cross sections, one end of each gas distribution pipe is air-in, the other end of each gas distribution pipe is closed, every two gas distribution pipes (6) are arranged in parallel, and the gas inlets are staggered and respectively communicated with different sides of the gas collection pipe (4); the gas distribution pipes (6) are provided with a plurality of groups, and the intervals between two adjacent groups are equal;
The air distribution pipe (6) is provided with a plurality of spray holes (7) along the length direction, the opening direction of the spray holes (7) is opposite to the incoming flow direction of the air duct, and aerosol is ejected out of the spray holes (7) into the air duct; the total area of the orifices of the injection holes (7) is more than or equal to the cross-sectional area of the gas distribution pipe (6).
2. The air duct aerosol mixer according to claim 1, wherein in the mixer body (1), the equivalent diameter of two gas distribution pipes (6) in the same group is 2 times of the interval between two adjacent groups.
3. The air duct aerosol mixer according to claim 1, characterized in that the injection holes (7) are arranged in the swirl zone of the gas distribution pipe (6).
4. A duct aerosol mixer as claimed in any one of claims 1 to 3, wherein the side walls of the header (4) and duct connections are common.
5. A duct aerosol mixer as claimed in any one of claims 1 to 3, wherein the aerosol delivery conduit interface (3) is located at a central location of the header (4).
6. A duct aerosol mixer as claimed in any one of claims 1 to 3, wherein the duct interface (2) is of flange configuration, in accordance with the duct conduit interface flange specification.
7. A duct aerosol mixer as claimed in any one of claims 1 to 3, wherein the aerosol delivery conduit interface (3) is of a flange configuration, in accordance with the interface flange specification of the aerosol delivery conduit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211377795.9A CN115753319B (en) | 2022-11-04 | 2022-11-04 | Air duct aerosol mixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211377795.9A CN115753319B (en) | 2022-11-04 | 2022-11-04 | Air duct aerosol mixing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115753319A CN115753319A (en) | 2023-03-07 |
| CN115753319B true CN115753319B (en) | 2024-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211377795.9A Active CN115753319B (en) | 2022-11-04 | 2022-11-04 | Air duct aerosol mixing device |
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| Country | Link |
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| CN (1) | CN115753319B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104437163A (en) * | 2014-12-01 | 2015-03-25 | 中国人民解放军军事医学科学院卫生装备研究所 | Integrated aerosol injecting and mixing device |
| CN110285519A (en) * | 2019-06-25 | 2019-09-27 | 北京强度环境研究所 | A kind of dry steam humidifier |
| CN213749309U (en) * | 2020-11-10 | 2021-07-20 | 唐山同海净化设备有限公司 | High-efficient mixing arrangement is used to aerosol |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE543277C2 (en) * | 2019-03-14 | 2020-11-10 | Camfil Ab | Aerosol distribution in filter testing systems |
| US11278921B2 (en) * | 2019-06-13 | 2022-03-22 | Camfil Ab | Aerosol distribution in filter testing systems |
-
2022
- 2022-11-04 CN CN202211377795.9A patent/CN115753319B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104437163A (en) * | 2014-12-01 | 2015-03-25 | 中国人民解放军军事医学科学院卫生装备研究所 | Integrated aerosol injecting and mixing device |
| CN110285519A (en) * | 2019-06-25 | 2019-09-27 | 北京强度环境研究所 | A kind of dry steam humidifier |
| CN213749309U (en) * | 2020-11-10 | 2021-07-20 | 唐山同海净化设备有限公司 | High-efficient mixing arrangement is used to aerosol |
Non-Patent Citations (2)
| Title |
|---|
| 一种用于生物气溶胶检测的微环境密闭舱室的研制;李娜;温占波;杨文慧;王洁;胡凌飞;张柯;李劲松;;军事医学;20150125(01);全文 * |
| 高湿环境下盐雾气溶胶混匀装置研究;马平昌等;《兵器装备工程学报》;20230625;全文 * |
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