CN211292463U - Aerosol particle size distribution tester - Google Patents
Aerosol particle size distribution tester Download PDFInfo
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- CN211292463U CN211292463U CN201921960296.6U CN201921960296U CN211292463U CN 211292463 U CN211292463 U CN 211292463U CN 201921960296 U CN201921960296 U CN 201921960296U CN 211292463 U CN211292463 U CN 211292463U
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Abstract
The utility model provides an aerosol particle size distribution tester, which can screen and separate aerosols with different particle sizes, is convenient for measuring and analyzing the aerosol particle size distribution, comprises a human upper respiratory tract simulator, a preseparator, a seven-grade nozzle, a micropore nozzle and a collection cup with one-to-one corresponding nozzle; the human upper respiratory tract simulator simulates human throat air inlet aerosol, the preseparator separates out larger particles in the aerosol, the first-level to seventh-level nozzles impact and separate the particles by using inertia effect, the nozzles at each level separate out particles with different particle sizes, and the particles are collected by the collecting cup until the particles impact the surface of the micropore collecting cup, so that the particle size measurement and analysis of the particles in the collecting cup can be conveniently carried out, the operation is simple, and the efficiency is high.
Description
Technical Field
The utility model relates to an experimental analysis equipment of granularity size distribution survey especially relates to an aerosol particle size distribution tester.
Background
Various types of aerosol particles exist in the air, both natural and those associated with human activity. Their concentration and particle size distribution are closely related to human health. Its impact on health and environment is one of the leading issues to be studied extensively in recent years.
The aerosol particles are inhaled by human body and then deposited on different parts of respiratory tract, and the deposition part and the deposition amount are related to the particle size of the aerosol. At present, no better method for directly measuring the deposition amount of the nano-silver particles in a human body exists. Therefore, aerosol particle size distribution measurement is a primary task of dose measurement, and it is highly desirable to provide a product device capable of measuring aerosol particle size distribution.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an aerosol particle size distribution tester, including the instrument main part, the instrument main part is connected with the aspiration pump, the instrument main part includes people's upper respiratory tract analogue means and preseparator of mutual intercommunication, people's upper respiratory tract analogue means is configured into the simulation human throat and admits aerosol, preseparator is configured into the screening the large granule that the particle size is 10-15 microns in the aerosol;
the instrument main body further comprises a particle size screening and separating part, the particle size screening and separating part comprises a shell, the shell comprises a top plate and a bottom plate, the top plate and the bottom plate are matched to enclose a sealed cavity, and an intermediate plate is arranged in the cavity; the middle plate is provided with eight mounting holes, the eight mounting holes are correspondingly provided with eight nozzles in total in a one-to-one matching manner, and the eight nozzles comprise a first-stage nozzle, a second-stage nozzle, a third-stage nozzle, a fourth-stage nozzle, a fifth-stage nozzle, a sixth-stage nozzle, a seventh-stage nozzle and a micropore nozzle;
the primary nozzle is communicated with the pre-separator;
the first-stage nozzle, the second-stage nozzle, the third-stage nozzle, the fourth-stage nozzle, the fifth-stage nozzle, the sixth-stage nozzle, the seventh-stage nozzle and the micropore nozzle are uniformly and correspondingly provided with grooves, the bottom of each groove is provided with a plurality of particle size through holes with the same aperture, and the aperture of each particle size through hole is gradually reduced from the particle size through hole corresponding to the second-stage nozzle to the particle size through hole corresponding to the micropore nozzle;
a collection cup is correspondingly arranged below each nozzle one by one and is positioned below the middle plate, and the collection cups are configured to collect aerosol particles flowing out of the particle size through holes;
the middle plate is provided with eight vent holes which are communicated with the collecting cups in a one-to-one correspondence manner.
Through adopting above-mentioned technical scheme, aerosol particulate matter air current gets into by people's upper respiratory tract analogue means, get into the one-level nozzle through the preseparator in advance, under the inertial action, the one-level cup surface is collected to the large granule thing striking, the little granule of inertia gets into the second grade nozzle along with the air current through roof interstage passageway, under the inertial action, the large granule thing strikes the second grade and collects the cup surface, the little granule of inertia gets into next grade nozzle along with the air current through roof interstage passageway, until last particulate matter strikes micropore collection cup surface, can carry out seven grades of particle size cutting separation to the aerosol, and then accomplish the test analysis to aerosol particle size distribution, moreover, the steam generator is simple in structure, and convenient.
The utility model discloses further set up to: the collecting area of the collecting cup is larger than the area of the groove, and the collecting cup comprises a particulate matter collecting part and a gas circulating part;
the eight vent holes on the middle plate are arranged in one-to-one correspondence with the gas circulation parts on the eight collecting cups;
the gas circulation part in the collecting cup corresponding to each stage of nozzle is communicated with the groove of the next stage of nozzle; on the intermediate plate, the vent hole that each grade nozzle corresponds all corresponds with next grade nozzle recess department share a sealing washer with the roof butt.
Through adopting above-mentioned technical scheme, the setting of sealing washer both can guarantee that the aerosol air current can circulate at different levels the nozzle carry out the particle size distribution and measure, can avoid external gas to get into again or avoid the aerosol blowout, and the leakproofness is good, and the result is accurate.
The utility model discloses further set up to: and a sealing ring is arranged between each collecting cup and the middle plate.
By adopting the technical scheme, the aerosol in the upper-stage nozzle is prevented from entering the lower-stage nozzle from a gap to influence an analysis result.
The utility model discloses further set up to: the shell is internally detachably provided with a collecting cup tray, and the eight collecting cups corresponding to the nozzles are detachably mounted on the collecting cup tray.
Through adopting above-mentioned technical scheme, the collecting tray can conveniently collect the dismantlement installation of cup, is convenient for collect the collection analysis of the aerosol particulate matter in the cup.
The utility model discloses further set up to: the pre-separator comprises a shell, a pre-separator main body and a base, wherein a solvent disc for dissolving the particles with the particle size larger than 10 micrometers in the aerosol is arranged on the pre-separator main body, and a pre-separator nozzle hole for allowing the particles with the particle size smaller than 10 micrometers in the aerosol to flow is formed in the pre-separator main body;
the preseparator main body is arranged on the base, and the shell and the base are arranged in a matching way to enable the preseparator main body to be sleeved in the shell; a flow through jet disposed on the base, the flow through jet configured to flow particles having a particle size of less than 10 microns in the aerosol;
the primary nozzle is provided with a connecting port end, and the circulating nozzle is sleeved at the connecting port end.
Through adopting above-mentioned technical scheme, the preseparator can dissolve bigger particulate matter with the solvent in the solvent dish, screens out the particulate matter more than 10 microns in the aerosol earlier, avoids the too big emergence that causes the jam condition to whole instrument and equipment of particulate matter particle size.
The utility model discloses further set up to: and an adsorption coating is coated on the inner wall of each collecting cup.
Through adopting above-mentioned technical scheme, every aerosol particle that drops in collecting the cup all can be adsorbed on collecting the cup bottom, avoids the bounce-back of particulate matter.
The utility model discloses further set up to: and a filter membrane is arranged at the bottom of the groove corresponding to the micropore nozzle.
Through adopting above-mentioned technical scheme, the filter membrane can filter the particulate matter in the last air current for very little particulate matter is along with air current discharge instrument, avoids the instrument to be blockked up by large granule thing.
Aerosol particle size distribution tester have following several advantages: 1) the operation is simple, and the efficiency is high; 2) the interstage loss of the particles is small, and the flow range is 15-100L/min; 3) different flow rates of each stage correspond to different cutting particle sizes; 4) the air extraction time is adjustable within the range of 0.1-9999S.
Drawings
Some specific embodiments of the present invention will be described in detail hereinafter with reference to the accompanying drawings and examples, without limiting the same. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale.
FIG. 1 is a schematic structural diagram of the aerosol particle size distribution tester of the present invention;
FIG. 2 is a schematic view of the internal structure of the aerosol particle size distribution tester of the present invention;
FIG. 3 is a schematic view of the internal structure of the aerosol particle size distribution tester of the present invention;
figure 4 is the utility model discloses aerosol particle size distribution tester cross-sectional view.
In the attached drawings, 1, a human upper respiratory tract simulator; 2. a pre-separator; 211. a preseparator body; 2111. a solvent pan; 2112. a pre-separator nozzle orifice; 212. a base; 2121. a flow-through spout; 3. an air pump; 4. a middle plate; 411. a vent hole; 5. a primary nozzle; 511. a connection port; 6. a secondary nozzle; 7. a tertiary nozzle; 8. a four-stage nozzle; 9. a five-stage nozzle; 10. a six-stage nozzle; 11. a seven-stage nozzle; 12. a micro-porous nozzle; 13. a collection cup; 14. a collection cup tray; 15. a seal ring; 16. a particle diameter through hole; 17. a top plate.
Detailed Description
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of the embodiments of the present invention when taken in conjunction with the accompanying drawings, which are set forth in the appended claims and in the accompanying drawings, 1 through 4.
The utility model provides an aerosol particle size distribution tester, includes the instrument main part, and the instrument main part is connected with aspiration pump 3, and aspiration pump 3 is used for carrying out the aerosol particle that the aerosol particle size distribution tester will get into and carries out the distribution of different particle sizes, subsequent measurement and analysis etc. with the aerosol particle in the main part through the mode suction to the instrument main part of bleeding. The utility model discloses an embodiment does: the instrument main body comprises a human upper respiratory tract simulator 1 and a preseparator 2 which are mutually communicated, wherein the human upper respiratory tract simulator 1 is used for simulating the air inlet aerosol of the throat of a human body, and the preseparator 2 is used for screening large particles with the particle size of 10-15 micrometers in the aerosol. The instrument main part still includes particle size screening separation part, particle size screening separation part includes the shell, the shell includes roof 17 and bottom plate, synthetic sealed cavity is enclosed in roof 17 and the bottom plate cooperation, be provided with intermediate lamella 4 in the cavity, eight mounting holes have been seted up on intermediate lamella 4, eight mounting hole department one-to-one cooperation is installed and is totally eight nozzles, eight nozzles are one-level nozzle 5 respectively, second grade nozzle 6, tertiary nozzle 7, level four nozzle 8, five-level nozzle 9, six-level nozzle 10, seven-level nozzle 11 and micropore nozzle 12, eight nozzles are according to order by first order nozzle to micropore nozzle order transverse arrangement setting, and eight nozzles all set up with roof 17 clearance. Human upper respiratory tract simulator 1 and preseparator 2 set up in one-level nozzle 5 one side, and preseparator 2 and one-level nozzle 5 intercommunication, aspiration pump 3 sets up at micropore nozzle 12 end, aspiration pump 3 bleeds, in the aerosol particulate matter is sucked into preseparator 2 by human upper respiratory tract simulator 1, then pass through one-level nozzle 5 in proper order, second grade nozzle 6, tertiary nozzle 7, fourth grade nozzle 8, fifth grade nozzle 9, six grade nozzles 10, seven grade nozzles 11 and micropore nozzle 12, every time passes through a nozzle, some aerosol is spouted, and along with pumping backward, the aerosol particle size is littleer, until the aerosol of final small particle size is pumped out by aspiration pump 3.
The utility model discloses a further embodiment does, preseparator 2 includes the casing, preseparator main part 211 and base 212 in advance, and casing and base 212 cooperation mounting cover are established in the preseparator main part 211 outside in advance. The preseparator main body 211 is provided with a solvent disk 2111 for dissolving the large particles in the aerosol, and the solvent disk 2111 contains a solvent for dissolving the large particles in the aerosol. A plurality of preseparator nozzle orifices 2112 are provided on preseparator body 211, with the plurality of preseparator nozzle orifices 2112 being distributed around the circumference of solvent disk 2111. When the aerosol is drawn into the preseparator 2 by the suction pump 3 via the human upper airway simulator 1, particles larger than 10 microns are dissolved by the solvent in the solvent disk 2111 and particles smaller than 10 microns continue to flow through the preseparator nozzle opening 2112. The side of the base 212 facing away from the pre-separator body 211 is provided with a flow-through nozzle 2121 protruding downward, and the small-particle size formulation flowing out through the pre-separator nozzle hole 2112 enters the primary nozzle 5 through the flow-through nozzle 2121. The primary nozzle 5 is provided with a connecting port 511 protruding upwards towards one side of the preseparator 2, and the circulating nozzle 2121 is sleeved at the connecting port 511 to complete the connection of the preseparator 2 and the primary nozzle 5.
The first-stage nozzle 5, the second-stage nozzle 6, the third-stage nozzle 7, the fourth-stage nozzle 8, the fifth-stage nozzle 9, the sixth-stage nozzle 10, the seventh-stage nozzle 11 and the micropore nozzle 12 are uniformly and correspondingly provided with grooves, the eight nozzle bodies can also be directly arranged into groove shapes, and a plurality of particle size through holes 16 with the same aperture are formed in the bottom of the groove corresponding to each nozzle and used for the circulation of aerosol. The apertures of the particle diameter through holes 16 corresponding to different nozzles are different in size, and the apertures are gradually reduced. And a collection cup 13 is correspondingly arranged below each nozzle, the collection cups 13 are positioned below the middle plate 4, and the collection cups 13 are used for collecting aerosol flowing out from the particle size through holes 16 in the corresponding nozzles. Because the aperture of the particle diameter through hole 16 corresponding to each nozzle is different, the particle diameters of aerosol particles collected by different collecting cups 13 are different, and then the particle diameter distribution test can be carried out on the aerosol. In order to ensure that large particles are collected in the collecting cup corresponding to the previous-stage nozzle and cannot continuously flow to the next-stage nozzle, the inner wall of each collecting cup 13 is coated with an adsorption coating, and large aerosol particles falling into the collecting cup 13 can be adsorbed on the bottom of the collecting cup 13, so that the rebound of large particles is avoided, and small particles are continuously pumped to the next-stage nozzle. In order to facilitate the flow of the aerosol with smaller particles to the nozzles of the next stage, the collection area of the collection cup 13 is larger than the area of the groove corresponding to each nozzle, the collection cup 13 includes a particle collection part and a gas circulation part, the particle collection part is located below the groove, and the gas circulation part is correspondingly communicated with the vent 411. The gas circulation part in the collecting cup 13 corresponding to each stage of nozzle is communicated with the next stage of nozzle groove. The specific implementation mode is as follows: eight vent holes 411 are further formed in the middle plate 4, and the eight vent holes 411 and the eight collecting cups 13 are arranged in a one-to-one correspondence manner, so that small particle aerosol can enter gaps between the nozzles and the top plate 17 through the vent holes 411 and flow into the next-stage nozzle under the air suction action of the air suction pump 3.
The utility model has the further implementation mode that a sealing ring 15 is arranged between each collecting cup 13 and the middle plate 4, the air vent 411 corresponding to each stage of nozzle shares a sealing ring 15 with the groove corresponding to the next stage of nozzle to abut against the top plate 17, and the sealing ring 15 can prevent the outside air from entering or prevent the aerosol from spraying when the aerosol airflow circulates through the nozzles at all stages to distribute the particle size, so that the sealing performance is good; and the influence on the analysis result caused by the fact that larger particles of aerosol in the nozzle of the previous stage enter the nozzle of the next stage from the gap can be avoided.
And in order to facilitate taking and placing the collecting cups 13, the utility model discloses preferably has set up collecting cup tray 14, and eight collecting cups 13 all can be demountable installation on collecting cup tray 14. When the particle size distribution of the aerosol needs to be measured and analyzed, the collection cup tray 14 is detached from the instrument main body, and then each collection cup 13 is detached from the collection cup tray 14, so that the particle size of the aerosol in each collection cup 13 can be analyzed and measured, and the like.
For the microporous nozzle 12 of the last stage, the bottom of the corresponding groove is provided with a filter membrane, and the filter membrane can filter the larger particles in the final airflow, so that the very small particles are discharged out of the instrument along with the airflow, and the suction pump 3 or the main body of the instrument is prevented from being blocked and damaged by the large particles.
Aerosol particle size distribution tester, its aerosol air current is got into by people upper respiratory tract analogue means 1, the particulate matter that 2 will be greater than 10 microns through preseparator separates out, then the particulate matter that is less than 10 microns gets into one-level nozzle 5, under the inertia effect, the large granule strikes the collection cup 13 surface that one-level nozzle 5 corresponds, the granule that inertia is little gets into second grade nozzle 6 along with the air current through 17 interstage clearances of roof, work in proper order, strike collection cup 13 surface that micropore nozzle 12 corresponds until last particulate matter, all the other tiny particles are taken out discharge instrument main part along with the air current by the aspiration pump. The utility model is simple in operation, efficiency is higher, and particulate matter interstage loss is little, and the flow range is 15-100L Min, and every grade of different flow corresponds different cutting particle diameters, and the air extraction time 0.1-9999S scope is adjustable.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that any modifications and decorations made by those skilled in the art without departing from the principle of the present invention should also be considered as the protection scope of the present invention.
Claims (7)
1. An aerosol particle size distribution tester comprises an instrument main body and is characterized in that the instrument main body is connected with an air suction pump and comprises a human upper respiratory tract simulation device and a preseparator which are communicated with each other, wherein the human upper respiratory tract simulation device is configured to simulate the air inlet aerosol of the throat of a human body, and the preseparator is configured to screen large particle matters with particle sizes of 10-15 micrometers in the aerosol;
the instrument main body further comprises a particle size screening and separating part, the particle size screening and separating part comprises a shell, the shell comprises a top plate and a bottom plate, the top plate and the bottom plate are matched to enclose a sealed cavity, and an intermediate plate is arranged in the cavity; the middle plate is provided with eight mounting holes, the eight mounting holes are correspondingly provided with eight nozzles in total in a one-to-one matching manner, and the eight nozzles comprise a first-stage nozzle, a second-stage nozzle, a third-stage nozzle, a fourth-stage nozzle, a fifth-stage nozzle, a sixth-stage nozzle, a seventh-stage nozzle and a micropore nozzle;
the primary nozzle is communicated with the pre-separator;
the first-stage nozzle, the second-stage nozzle, the third-stage nozzle, the fourth-stage nozzle, the fifth-stage nozzle, the sixth-stage nozzle, the seventh-stage nozzle and the micropore nozzle are uniformly and correspondingly provided with grooves, the bottom of each groove is provided with a plurality of particle size through holes with the same aperture, and the aperture of each particle size through hole is gradually reduced from the particle size through hole corresponding to the second-stage nozzle to the particle size through hole corresponding to the micropore nozzle;
a collection cup is correspondingly arranged below each nozzle one by one and is positioned below the middle plate, and the collection cups are configured to collect aerosol particles flowing out of the particle size through holes;
the middle plate is provided with eight vent holes which are communicated with the collecting cups in a one-to-one correspondence manner.
2. The aerosol particle size distribution tester of claim 1, wherein the collection cup has a collection area greater than an area of the grooves, the collection cup including a particulate collection portion and a gas circulation portion;
the eight vent holes on the middle plate are arranged in one-to-one correspondence with the gas circulation parts on the eight collecting cups;
the gas circulation part in the collecting cup corresponding to each stage of nozzle is communicated with the groove of the next stage of nozzle; on the intermediate plate, the vent hole that each grade nozzle corresponds all corresponds with next grade nozzle recess department share a sealing washer with the roof butt.
3. The aerosol particle size distribution tester of claim 2 wherein a sealing ring is disposed between each collection cup and the intermediate plate.
4. The aerosol particle size distribution tester of claim 1 wherein a collection cup tray is removably disposed within the housing, and wherein the collection cups corresponding to eight of the nozzles are removably mountable on the collection cup tray.
5. The aerosol particle size distribution tester according to claim 1, wherein the preseparator comprises a housing, a preseparator main body and a base, the preseparator main body is provided with a solvent disk for dissolving particles with a particle size of more than 10 microns in the aerosol, and the preseparator main body is provided with a preseparator nozzle hole for circulating particles with a particle size of less than 10 microns in the aerosol;
the preseparator main body is arranged on the base, and the shell and the base are arranged in a matching way to enable the preseparator main body to be sleeved in the shell; a flow through jet disposed on the base, the flow through jet configured to flow particles having a particle size of less than 10 microns in the aerosol;
the primary nozzle is provided with a connecting port end, and the circulating nozzle is sleeved at the connecting port end.
6. The aerosol particle size distribution tester of claim 2 wherein each of the collection cup inner walls is coated with an adsorbent coating.
7. The aerosol particle size distribution tester of claim 1, wherein the bottom of the groove corresponding to the micro-orifice nozzle is provided with a filter membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921960296.6U CN211292463U (en) | 2019-11-12 | 2019-11-12 | Aerosol particle size distribution tester |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921960296.6U CN211292463U (en) | 2019-11-12 | 2019-11-12 | Aerosol particle size distribution tester |
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| CN211292463U true CN211292463U (en) | 2020-08-18 |
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| CN201921960296.6U Active CN211292463U (en) | 2019-11-12 | 2019-11-12 | Aerosol particle size distribution tester |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858119A (en) * | 2019-11-12 | 2021-05-28 | 北京慧荣和科技有限公司 | Aerosol particle size distribution tester |
| CN113176117A (en) * | 2021-04-01 | 2021-07-27 | 中国人民解放军军事科学院军事医学研究院 | Microorganism aerosol electrostatic collection device |
| CN114225726A (en) * | 2021-12-27 | 2022-03-25 | 江苏苏净集团有限公司 | Aerosol generating system |
-
2019
- 2019-11-12 CN CN201921960296.6U patent/CN211292463U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858119A (en) * | 2019-11-12 | 2021-05-28 | 北京慧荣和科技有限公司 | Aerosol particle size distribution tester |
| CN113176117A (en) * | 2021-04-01 | 2021-07-27 | 中国人民解放军军事科学院军事医学研究院 | Microorganism aerosol electrostatic collection device |
| CN113176117B (en) * | 2021-04-01 | 2022-08-02 | 中国人民解放军军事科学院军事医学研究院 | Microorganism aerosol electrostatic collection device |
| CN114225726A (en) * | 2021-12-27 | 2022-03-25 | 江苏苏净集团有限公司 | Aerosol generating system |
| CN114225726B (en) * | 2021-12-27 | 2023-09-19 | 江苏苏净集团有限公司 | Aerosol generating system |
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