CN115406726B - Air aerosol sampler - Google Patents
Air aerosol sampler Download PDFInfo
- Publication number
- CN115406726B CN115406726B CN202211314844.4A CN202211314844A CN115406726B CN 115406726 B CN115406726 B CN 115406726B CN 202211314844 A CN202211314844 A CN 202211314844A CN 115406726 B CN115406726 B CN 115406726B
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- liquid
- paste
- air
- sampling
- liquid outlet
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- 239000000443 aerosol Substances 0.000 title claims abstract description 44
- 239000007788 liquid Substances 0.000 claims abstract description 150
- 238000005070 sampling Methods 0.000 claims abstract description 60
- 239000002245 particle Substances 0.000 claims abstract description 24
- 230000004308 accommodation Effects 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims description 6
- 238000007790 scraping Methods 0.000 claims description 2
- 238000005119 centrifugation Methods 0.000 abstract description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 241000711573 Coronaviridae Species 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
-
- B08B1/165—
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2211—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with cyclones
Abstract
An air aerosol sampler, comprising: a centrifugal sampling tube; a centrifugal fan; fixed lid, install in lower extreme opening part, fixed lid be fixed with set up in the screw rod on sampling chamber, screw rod threaded connection has the scraper blade, the scraper blade is used for the paste entrapment through screw thread rebound behind the aerosol particle, and will the paste scrape extremely the accommodation space on sampling chamber top, accommodation space by centrifugation sampling pipe and scraper blade form, just accommodation space has inlet and liquid outlet, liquid by the inlet gets into accommodation space is in order to erode the paste, and mixed with the paste liquid by the liquid outlet flows. The sampler has the advantages that the sampler can output liquid samples under the non-directional requirement on placement, and special requirements of unmanned aerial vehicle throwing sampling and the like are met.
Description
Technical Field
The application relates to the technical field of aerosol, in particular to an air aerosol sampler.
Background
The detection of biological particles such as new coronavirus floating in the air usually requires collecting the particles into a liquid sample and then analyzing and detecting the particles. At present, two technologies of wet sampling and dry sampling exist, wherein a dry sampler collects biological particles in air on a filter membrane, then the filter membrane is detached, and the biological particles are transferred into a liquid sample through a washing device, and the defect that the liquid sample cannot be directly obtained is overcome; wet samplers trap biological particles in liquid, usually by cyclonic means, with the advantage that a liquid sample can be obtained directly, but have the disadvantage that the orientation requirements for the placement of the device are relatively strong, usually having to be placed vertically, otherwise liquid can easily flow into the fan during sampling.
However, for high-altitude sampling, high-place sampling, sampling in which personnel are not convenient to go to the site, and the like, a forward task needs to be performed through a sampling analysis device mounted or thrown in by an unmanned aerial vehicle/unmanned vehicle, and the like, and at the moment, a liquid sample is required to be directly obtained so as to facilitate an analysis result. The existing sampling technical equipment can not meet the special requirements of unmanned aerial vehicle throwing type sampling and the like.
Disclosure of Invention
In view of the above, the present application is made to provide an air aerosol sampler that overcomes or at least partially solves the above problems.
The invention provides an air aerosol sampler, comprising: the centrifugal sampling tube defines a sampling cavity for smearing paste, and the sampling cavity is provided with an upper end opening, a lower end opening and a side air inlet; the centrifugal fan is arranged at the upper end opening and is used for generating an air flow which spirals upwards from the side air inlet in the sampling cavity, and aerosol particles in the air flow are captured by the paste when the air flow spirals upwards; fixed lid, install in lower extreme opening part, fixed lid be fixed with set up in the screw rod on sampling chamber, screw rod threaded connection has the scraper blade, the scraper blade is used for the paste entrapment through screw thread rebound behind the aerosol particle, and will the paste scrape extremely the accommodation space on sampling chamber top, accommodation space by centrifugation sampling pipe and scraper blade form, just accommodation space has inlet and liquid outlet, liquid by the inlet gets into accommodation space is in order to erode the paste, and mixed with the paste liquid by the liquid outlet flows.
Optionally, the sampling cavity has an upper sidewall, a top wall extending outward from a lower end of the upper sidewall in a radial direction, and a lower sidewall extending downward from an end of the top wall away from the upper sidewall, the top wall forming a top surface of the accommodating space, and an upper portion of the lower sidewall forming an outer side surface of the accommodating space.
Optionally, the liquid inlet and the liquid outlet open in the roof.
Optionally, the scraper includes a main body and a protrusion disposed above the main body, a portion of the upper surface of the main body corresponding to the top wall forms a bottom surface of the accommodating space, and a lower portion of a side surface of the protrusion forms an inner side surface of the accommodating space.
Optionally, an upper portion of the upper sidewall is used for mounting the centrifugal fan, and a lower portion of the upper sidewall is used for accommodating a portion of the protrusion when the accommodating space is formed.
Optionally, the air aerosol sampler further comprises: one end of the liquid inlet pipe is connected with the liquid inlet; one end of the liquid outlet pipe is connected with the liquid outlet; the liquid bottle is used for installing the liquid and is connected with the other end of the liquid inlet pipe and the other end of the liquid outlet pipe; a liquid pump installed in the liquid inlet pipe and configured to generate power for allowing the liquid in the liquid bottle to enter the accommodating space from the liquid inlet pipe and the liquid inlet and for allowing the liquid mixed with the paste to flow back to the liquid bottle from the liquid outlet pipe and the liquid outlet pipe.
Optionally, the air aerosol sampler further comprises: the two-position three-way valve is arranged in the liquid inlet pipe and has a first state for communicating the liquid bottle and the liquid flow path between the liquid inlets and a second state for communicating the liquid bottle and the detection equipment for detecting the liquid.
Optionally, the liquid inlet pipe and the liquid outlet pipe are hoses, and the liquid bottle is hung on the fixing frame through the liquid inlet pipe and the liquid outlet pipe.
Optionally, the air aerosol sampler further comprises: the motor is installed at one end, deviating from the sampling cavity, of the fixed cover, and the motor is connected with the screw to drive the screw to rotate, so that the scraper is driven to move.
Optionally, the fixed cover is detachably mounted at the lower end opening.
The air aerosol sampler provided by the invention has the advantages that the containing space for forming the liquid with aerosol particles only has the liquid inlet and the liquid outlet, and is not communicated with the centrifugal fan, no matter the placement direction of the air aerosol sampler is, the liquid cannot be poured into the fan, and the special requirements of unmanned aerial vehicle throwing sampling and the like are met.
Drawings
Other objects and advantages of the present invention will become apparent from the following description of the invention which refers to the accompanying drawings, and may assist in a comprehensive understanding of the invention.
FIG. 1 is a schematic structural view of an air aerosol sampler of some embodiments of the present application;
FIG. 2 is a cross-sectional view of a centrifugal sampling tube of an air aerosol sampler of some embodiments of the present application;
FIG. 3 is a cross-sectional view of an air aerosol sampler of some embodiments of the present application with a scraper positioned below;
FIG. 4 is a cross-sectional view of an air aerosol sampler of some embodiments of the present application with a scraper positioned above;
fig. 5 is a schematic enlarged view of the region a shown in fig. 4.
In the figure, 10 is an air aerosol sampler, 100 is a centrifugal sampling tube, 110 is a sampling cavity, 120 is an upper end opening, 130 is a lower end opening, 140 is a side air inlet, 150 is an accommodating space, 160 is an upper side wall, 170 is a top wall, 180 is a lower side wall, 200 is a centrifugal fan, 300 is a fixed cover, 400 is a screw rod, 500 is a scraper blade, 510 is a main body, 520 is a protrusion, and 600 is a motor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention. It should be apparent that the described embodiment is one embodiment of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
The present embodiment provides an air aerosol sampler 10, and the air aerosol sampler 10 at least comprises a centrifugal sampling tube 100, a centrifugal fan 200, a fixed cover 300, and the like. FIG. 1 is a schematic diagram of the construction of an air aerosol sampler 10 according to some embodiments of the present application; FIG. 2 is a cross-sectional view of a centrifugal sampling tube 100 of the air aerosol sampler 10 of some embodiments of the present application; FIG. 3 is a cross-sectional view of the air aerosol sampler 10 of some embodiments of the present application with the scraper 500 positioned below; FIG. 4 is a cross-sectional view of the air aerosol sampler 10 of some embodiments of the present application with the scraper 500 positioned above; fig. 5 is a schematic enlarged view of the region a shown in fig. 4.
Wherein the centrifugal sampling tube 100 defines a sampling chamber 110 for applying a paste, said sampling chamber 110 having an upper end opening 120, a lower end opening 130 and a side inlet vent 140.
A centrifugal fan 200 (which may be a high flow fan, and generally requires a high flow sampler for collecting a large amount of airborne particles to prevent false negative results due to its very low airborne biological particle content) is installed at the upper end opening 120 for generating an air flow spiraling upward from the side air inlet 140 in the sampling chamber 110, and the airborne particles in the air flow are captured by the paste while spiraling upward.
The fixing cover 300 is installed at the lower end opening 130, the fixing cover 300 is fixed with a screw 400 arranged in the sampling cavity 110, the screw 400 is in threaded connection with a scraper 500, the scraper 500 is used for moving upwards through threads after the paste collects the aerosol particles and scraping the paste to an accommodating space 150 at the top end of the sampling cavity 110, the accommodating space 150 is formed by the centrifugal sampling tube 100 and the scraper 500, the accommodating space 150 is provided with a liquid inlet and a liquid outlet, liquid enters the accommodating space 150 through the liquid inlet to wash out the paste, and the liquid mixed with the paste flows out of the liquid outlet.
The accommodating space 150 for forming the liquid with aerosol particles of the air aerosol sampler 10 provided by the embodiment only has a liquid inlet and a liquid outlet, and is not communicated with the centrifugal fan 200, so that no matter how the air aerosol sampler 10 is placed, the liquid can not be poured into the fan, and special requirements such as unmanned aerial vehicle putting-in type sampling are met. The sampler provided by the embodiment is a sampler which has no directional requirement on placement and can output a liquid sample.
In some embodiments, the sampling chamber 110 has an upper sidewall 160, a top wall 170 extending outward in a radial direction from a lower end of the upper sidewall 160, and a lower sidewall 180 extending downward from an end of the top wall 170 away from the upper sidewall 160, the top wall 170 forming a top surface of the receiving space 150, and an upper portion of the lower sidewall 180 forming an outer side surface of the receiving space 150.
The centrifugal sampling tube 100 is directly used to form a part of the accommodating space 150, so that the whole structure is simple, no gap exists between the top surface and the outer side surface of the accommodating space 150, and liquid leakage to the centrifugal fan 200 is avoided.
Wherein the liquid inlet and the liquid outlet are disposed on the top wall 170. If the side wall is provided, the paste or liquid may flow out directly, which is not easy to control, and therefore, the liquid inlet and the liquid outlet are provided on the top wall 170.
In some embodiments, the scraper 500 includes a main body 510 and a protrusion 520 disposed above the main body 510, wherein a portion of an upper surface of the main body 510 corresponding to the top wall 170 forms a bottom surface of the accommodating space 150, and a lower portion of a side surface of the protrusion 520 forms an inner side surface of the accommodating space 150. Accordingly, no gap is formed between the bottom surface and the inner side surface of the accommodating space 150, and liquid does not leak to the centrifugal fan 200.
In some embodiments, an upper portion of the upper sidewall 160 is used for mounting the centrifugal fan 200, and a lower portion of the upper sidewall 160 is used for receiving a portion of the protrusion 520 when the receiving space 150 is formed. Therefore, the paste or liquid is prevented from leaking out from the junction of the inner side surface and the top surface.
The air aerosol sampler 10 may also include a liquid inlet tube, a liquid outlet tube, a liquid bottle, and a liquid pump. One end of the liquid inlet pipe is connected with the liquid inlet; one end of the liquid outlet pipe is connected with the liquid outlet; the liquid bottle is used for installing the liquid and is connected with the other end of the liquid inlet pipe and the other end of the liquid outlet pipe; the liquid pump is mounted to the liquid inlet tube and configured to generate a force for causing liquid in the liquid bottle to enter the receiving space 150 from the liquid inlet tube and the liquid inlet and for causing the liquid mixed with the paste to flow back to the liquid bottle from the liquid outlet tube and the liquid outlet tube.
In some embodiments, the air aerosol sampler 10 further comprises a two-position three-way valve installed in the liquid inlet pipe, and having a first state for conducting the liquid flow path between the liquid bottle and the liquid inlet, and a second state for conducting the liquid bottle and a detection device for detecting the liquid. Therefore, the detection can be directly carried out through the switching of the two-position three-way valve, and the use is convenient.
The liquid inlet pipe and the liquid outlet pipe are flexible pipes, and the liquid bottle is hung on the fixing frame through the liquid inlet pipe and the liquid outlet pipe. Therefore, an additional device is not needed for fixing the liquid bottle, and the structure is simple.
The air aerosol sampler 10 may further include a motor 600, the motor 600 is mounted at an end of the fixing cap 300 facing away from the sampling cavity 110, and the motor 600 is connected to the screw 400 to drive the screw 400 to rotate, so as to drive the scraper 500 to move. Therefore, the problems that the motor 600 is installed in the sampling cavity 110, the sampling efficiency is low, the service life of the motor 600 is influenced and the like are avoided.
The fixing cap 300 is detachably mounted at the lower end opening 130, thereby facilitating operations of applying paste, cleaning, etc.
In operation, the fixing cap 300 is opened, the scraper 500 is removed, a layer (preferably 0.05-0.5mm thick) of paste (which may be water-soluble or oil-soluble paste, is applied to the particles captured by the application of the paste, thereby improving the sampling efficiency) is applied to the centrifugal sampling tube 100 by means of a brush, and then the scraper 500 and the fixing cap 300 are installed. The fan is started, air enters from the air inlet 140 at the side part of the centrifugal sampling tube 100 and enters the tube along the tangential direction to form a spiral upward high-speed airflow, air particles are gradually separated from the airflow under the action of centrifugal force and impact on the inner wall of the centrifugal sampling tube 100 and are adhered and trapped by the paste coating on the inner wall, and the particles are prevented from rebounding and being taken away along with the airflow. After the set sampling time is reached, the centrifugal fan 200 is stopped, the motor 600 is started, the motor 600 drives the screw 400 to rotate, the screw 400 and the scraper 500 are in threaded transmission, the scraper 500 is pushed upwards, and therefore the coated paste-like substances are scraped to the top. When the scraper 500 moves to the top, a closed loop (i.e., the receiving space 150) is formed with the top structure of the centrifugal sampling tube 100, and the top structure may have a protruding stopper to separate the loops and two through holes to allow one-way flow of liquid.
Then the control system starts a liquid pump and leads the two-position three-way valve to the centrifugal sampling pipe 100, liquid (water-soluble or oil-soluble liquid) in the liquid bottle is conveyed to the closed annular structure, the paste rich in target sampling particles (biological particles such as viruses and bacteria or non-biological particles such as compounds and dust) is subjected to closed-loop circulating flushing to form a liquid sample rich in the target sampling particles, then the flushing is stopped, and the two-position three-way valve is led to a detection device to analyze and detect the liquid sample.
This kind of sample thief is no matter how its direction of placing, and the liquid in the liquid bottle can all be guaranteed to this structure carries out effective output, can not irritate centrifugal fan 200, and the technical problem who samples when having solved unmanned aerial vehicle and having put in detects. And the sampler has simple and reliable structure, light weight, low cost and wider application scene than the conventional sampler. It should also be noted that, in the case of the embodiments of the present invention, features of the embodiments and examples may be combined with each other to obtain a new embodiment without conflict.
The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and the scope of the present invention is subject to the scope of the claims.
Claims (8)
1. An air aerosol sampler, comprising:
the centrifugal sampling tube defines a sampling cavity for smearing paste, and the sampling cavity is provided with an upper end opening, a lower end opening and a side air inlet;
the centrifugal fan is arranged at the upper end opening and is used for generating an air flow which spirals upwards from the side air inlet in the sampling cavity, and aerosol particles in the air flow are captured by the paste when the air flow spirals upwards;
the fixed cover is arranged at the lower end opening, a screw rod arranged in the sampling cavity is fixed on the fixed cover, a scraper is connected with the screw rod in a threaded manner, the scraper is used for moving upwards through threads after the paste collects the aerosol particles and scraping the paste to an accommodating space at the top end of the sampling cavity, the accommodating space is formed by the centrifugal sampling tube and the scraper, the accommodating space is provided with a liquid inlet and a liquid outlet, liquid enters the accommodating space from the liquid inlet to wash the paste, and the liquid mixed with the paste flows out of the liquid outlet;
the sampling cavity is provided with an upper side wall, a top wall and a lower side wall, the top wall extends outwards from the lower end of the upper side wall in the radial direction, one end of the top wall, far away from the upper side wall, extends downwards, the top wall forms the top surface of the accommodating space, and the upper part of the lower side wall forms the outer side surface of the accommodating space;
the scraper blade includes the main part and set up in the arch of main part top, the upper surface of main part with the part that the roof corresponds forms accommodation space's bottom surface, the lower part of bellied side forms accommodation space's medial surface.
2. The air aerosol sampler as recited in claim 1,
the liquid inlet and the liquid outlet are arranged on the top wall.
3. The air aerosol sampler of claim 1,
the upper portion of the upper sidewall is used for mounting the centrifugal fan, and the lower portion of the upper sidewall is used for accommodating a portion of the protrusion when the accommodating space is formed.
4. The air aerosol sampler as recited in claim 1, further comprising:
one end of the liquid inlet pipe is connected with the liquid inlet;
one end of the liquid outlet pipe is connected with the liquid outlet;
the liquid bottle is used for installing the liquid and is connected with the other end of the liquid inlet pipe and the other end of the liquid outlet pipe;
a liquid pump installed in the liquid inlet pipe and configured to generate a power for allowing the liquid in the liquid bottle to enter the accommodating space from the liquid inlet pipe and the liquid inlet and for allowing the liquid mixed with the paste to flow back to the liquid bottle from the liquid outlet pipe and the liquid outlet pipe.
5. The air aerosol sampler as recited in claim 4, further comprising:
the two-position three-way valve is arranged in the liquid inlet pipe and has a first state for communicating the liquid bottle and the liquid flow path between the liquid inlets and a second state for communicating the liquid bottle and the detection equipment for detecting the liquid.
6. The air aerosol sampler as recited in claim 4,
the liquid inlet pipe and the liquid outlet pipe are flexible pipes, and the liquid bottle is hung on the fixing frame through the liquid inlet pipe and the liquid outlet pipe.
7. The air aerosol sampler of claim 1, further comprising:
the motor is installed at one end, deviating from the sampling cavity, of the fixed cover, and the motor is connected with the screw to drive the screw to rotate, so that the scraper is driven to move.
8. The air aerosol sampler of claim 1,
the fixed cover is detachably arranged at the lower end opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211314844.4A CN115406726B (en) | 2022-10-26 | 2022-10-26 | Air aerosol sampler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211314844.4A CN115406726B (en) | 2022-10-26 | 2022-10-26 | Air aerosol sampler |
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| Publication Number | Publication Date |
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| CN115406726A CN115406726A (en) | 2022-11-29 |
| CN115406726B true CN115406726B (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211314844.4A Active CN115406726B (en) | 2022-10-26 | 2022-10-26 | Air aerosol sampler |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116793767B (en) * | 2023-05-19 | 2024-01-26 | 夏津新希望六和农牧有限公司 | Active capturing device for African swine fever aerosol and detection method thereof |
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| CN105203352A (en) * | 2014-06-18 | 2015-12-30 | 中国科学院大连化学物理研究所 | Non-contact suction-type sampling device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1208113C (en) * | 2003-05-01 | 2005-06-29 | 东南大学 | Device for collecting micro-substance in air and collection method thereof |
| CN217442943U (en) * | 2022-05-23 | 2022-09-16 | 北京智丰迅采科技有限公司 | Dry-wet integrated cyclone type biological aerosol sampler |
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2022
- 2022-10-26 CN CN202211314844.4A patent/CN115406726B/en active Active
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| CN105203352A (en) * | 2014-06-18 | 2015-12-30 | 中国科学院大连化学物理研究所 | Non-contact suction-type sampling device |
| CN211553460U (en) * | 2020-02-13 | 2020-09-22 | 北京慧荣和科技有限公司 | Wet-wall cyclone type biological aerosol sampler |
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| CN114152713A (en) * | 2021-11-12 | 2022-03-08 | 北京华能长江环保科技研究院有限公司 | Device and method for collecting and detecting gaseous and granular heavy metals of fixed pollution source |
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| CN115406726A (en) | 2022-11-29 |
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