CN108760414A - Middle flow void whirlwind sampler and its application method - Google Patents
Middle flow void whirlwind sampler and its application method Download PDFInfo
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- CN108760414A CN108760414A CN201810873080.XA CN201810873080A CN108760414A CN 108760414 A CN108760414 A CN 108760414A CN 201810873080 A CN201810873080 A CN 201810873080A CN 108760414 A CN108760414 A CN 108760414A
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- 239000011800 void material Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 9
- 230000006641 stabilisation Effects 0.000 claims abstract description 18
- 238000011105 stabilization Methods 0.000 claims abstract description 18
- 230000002093 peripheral effect Effects 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 13
- 230000003139 buffering effect Effects 0.000 claims description 11
- 239000012528 membrane Substances 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 239000000872 buffer Substances 0.000 claims description 3
- 239000013618 particulate matter Substances 0.000 abstract description 21
- 238000005070 sampling Methods 0.000 abstract description 11
- 238000012545 processing Methods 0.000 abstract description 7
- 230000008021 deposition Effects 0.000 abstract description 4
- 230000004907 flux Effects 0.000 abstract description 4
- 230000035939 shock Effects 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 17
- 239000007789 gas Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 239000000443 aerosol Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000013024 dilution buffer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- G01N1/2211—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with cyclones
-
- 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
- G01N1/24—Suction devices
-
- 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
- G01N2001/222—Other features
- G01N2001/2223—Other features aerosol sampling devices
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The present invention relates to a kind of middle flow void whirlwind sampler and its application methods, can be used for Atmospheric particulates sampling.Middle flow void whirlwind sampler of the present invention includes the current stabilization lid being made of head cover and diversion column, the sampler upper body equipped with empty cyclonic chamber, trap internal on sampler and the sampler lower body equipped with outlet chamber, and the current stabilization lid, sampler upper body, trap and sampler lower body are stacked and removably connected successively.Middle flow void whirlwind sampler structure of the present invention is reasonable, easily fabricated processing, it is possible to prevente effectively from deposition, shock and the settling flux of particulate matter when sampling.
Description
Technical field
The invention belongs to Atmospheric particulates sampling technique fields, and in particular to a kind of middle flow void whirlwind sampler and its make
Use method.
Background technology
It sells both at home and abroad at present, the use of more atmosphere particulate matter sampler be mostly that conventional inertia andersen sampler such as impacts
Formula sampler or cyclone type sampler.Since particulate matter can collide with wall surface, there are following for both samplers
Disadvantage (1) bulky grain over-deposit on entrapment plate (or wall surface) can influence the trapping effect of sampler；(2) in particulate matter and wall
Face collide during may because of the rupture of particle, agglomeration and chemical reaction change particulate matter physicochemical property,
Surface texture and structural intergrity, to be adversely affected to the analysis of next step detection；(3) particulate matter is in inertia impact
The particulate matter that rebound and settling flux on device entrapment plate can cause part that should be separated remains, due to this part
Grain object grain size is larger, and quality is also larger, to bring larger error to the acquisition of the relatively small target particles object of grain size；
(4) sampler pressure drop is larger so that equipment volume increases, and limits the development of sampler.
To improve the above problem existing for existing sampler, there is scholar to propose the concept of empty cyclone type sampler：With non-
Greater particle size particle is imported centrifugation vortex by impact principle from main inlet air flow, to avoid particulate matter and sampler wall surface
Collision, realizes the cascade sampling of particulate matter.However due to be not easy to manufacture processing, the development of empty whirlwind sampler and application by
Limitation.
Invention content
The purpose of the present invention is to provide a kind of novel middle flow void whirlwind sampler, the sampler structure rationally,
Easily fabricated processing, it is possible to prevente effectively from deposition, shock and the settling flux of particulate matter when sampling.
Bioaerosol sampler of the present invention based on empty cyclonic principle includes being made of head cover and diversion column
Current stabilization lid, the sampler upper body equipped with empty cyclonic chamber, trap internal on sampler and equipped with the sampling of outlet chamber
Device lower body, the current stabilization lid, sampler upper body, trap and sampler lower body are stacked and are removably connected successively；
The sampler upper body is additionally provided with the cylindrical type inlet chamber being inserted into for diversion column, the diversion column and cylindrical type into
Air cavity cooperatively forms circular ring shape inlet channel, and the upper end of the cylindrical type inlet chamber extends outside to form outer rim, the outer rim
On several support columns for being used to support head cover are installed.
Air-flow containing particulate matter is entered from annular inlet passageway in sampler, when by empty cyclonic chamber, greater particle size
Particle is collected on trap, remaining air-flow is discharged from cylindrical type outlet chamber.
Preferably, the length of diversion column is about the sum of the length of top cover support column and cylindrical type inlet chamber, water conservancy diversion after installation
The lower end of column is in same horizontal line with the lower end of cylindrical type inlet chamber.
In embodiments of the invention, the empty cyclonic chamber by sequentially connected first arc inner wall, horizontal interior walls and
Second arc inner wall forms；The upper end of first arc inner wall is connect with the lower end of cylindrical type inlet chamber, first arc
For inner wall towards trap protrusion, the protrusion direction of second arc inner wall is opposite with the protrusion direction of the first arc inner wall.
When air-flow containing particulate matter passes through the first arc inner wall, as the first arc inner wall changes original flow direction, part
Air-flow changes stream and enters in sampler lower body back through horizontal interior walls and the second arc inner wall and be discharged from gas outlet, remaining
Part a boundary circulating is then formed in the cavity under the first arc inner wall.After the air-flow newly entered meets with boundary circulating
Change its original flow direction, larger particulate matter is then separated due to effect of inertia from primary air in air-flow, into Boundary Loop
In stream, storage of being finally caught is collected.
Second arc inner wall can generate cushioning effect to the air-flow that will enter sampler lower body, with steady empty whirlwind
The air pressure of intracavitary.
Further, the bending angle of first arc inner wall and the second arc inner wall is 90 °.
Further, the entrance of the cylindrical type inlet chamber is equipped with the first rounded corner.
The setting of first rounded corner reduces the deposition of particulate matter here when dust-contained airflow flows through, while rounded corner
Setting reduce difficulty of processing.
In embodiments of the invention, the outer rim, which corresponds to, is equipped with first through hole, the head cover pair at support column lower end
It answers and is equipped with the second through-hole at upper end of support column, and the support column is equipped with third through-hole；The head cover is solid by screw bolt and nut
Determine on the support columns, the bolt passes through first through hole, third through-hole and the second through-hole.
Further, several described first through hole, which combine, the first opening up counterbore, several described supports
The lower end of column is respectively positioned in the first counterbore.
For reduction difficulty of processing, sampler upper body and support column can be processed respectively, it then again will be under support column
End is fixed on adhesive in the first counterbore.
Further, several described second through-holes, which combine, downward opening second counterbore, several described branch
The upper end of dagger is respectively positioned in the second counterbore.
For convenience of assembling, first cover board can be placed on the support columns, and the upper end of support column is made to be embedded into the second counterbore,
After firm, it is being fixed successively with screw and nut.
In embodiments of the invention, the lower part of the sampler upper body is additionally provided with group and behave affectedly, described group behave affectedly including
One chamber of assembling for being assembled with trap and two chamber of assembling for being assembled with sampler lower body；The upper wall of one chamber of the assembling is by void
Cyclonic chamber lower end extends outside, and the peripheral wall lower end of one chamber of the assembling is connect with the peripheral wall upper end of two chambers of assembling, described
It assembles and is equipped with internal thread on the inside of the peripheral wall of two chambers.
In embodiments of the invention, the top end face of the sampler lower body is equipped with trap saddle, the sampler
The upper periphery of lower body is equipped with assembling grove, and the peripheral wall of the assembling grove is equipped with the external screw thread for being screwed with internal thread.
For convenience of assembling, the sampler upper body and sampler lower body are revolving part, the sampler upper body and sampling
Device lower body is engaged with external screw thread by internal thread and fitted together.Normally, the sampler upper body and sampler lower body are spelled
External after conjunction is in smooth cylindrical structure.
In embodiments of the invention, the sampler lower body is additionally provided with cushion chamber, and the cushion chamber includes in cylinder
One chamber of buffering of type structure and two chamber of buffering in frustum cone structure；The lower end of two chambers of the buffering and the upper end of outlet chamber connect.
In order to which steady air flow, reduction microbial aerosol are broken, middle flow void whirlwind sampler of the present invention devises
The internal diameter of cushion chamber, gas channel slowly reduces, and reduces the pressure loss of air-flow suddenly change generation.
In embodiments of the invention, the outlet chamber includes one chamber of outlet and outlet two for being in cylindrical structure
Chamber；The internal diameter of one chamber of the outlet is less than the internal diameter of two chamber of outlet, and two intracavitary of the outlet is vertically installed with several confessions and consolidates
Determine the first sealing ring of filter membrane clip.
Sampler and external air extractor can be directly connected to by the design of outlet chamber of the present invention, need not be used and be turned
Connector, it is easy to use.
Preferably, first sealing ring is silica gel sealing ring.
In embodiments of the invention, the trap includes support ring, the trapping ware in support ring, Yi Jiruo
The support chip that dry both ends are connect with support ring and trapping ware respectively；The support ring is fixed on the upper wall and buffering of one chamber of assembling
Between the upper wall of one chamber, the peripheral wall of the trapping ware extend into the lower section in empty cyclonic chamber and positioned at horizontal interior walls.
To be fixedly secured and ensureing air-tightness, further, the is equipped between the support ring and the peripheral wall for assembling a chamber
Two sealing rings.Preferably, the second sealing ring thickness is equal with the thickness of support ring and support chip.
Further, the peripheral wall outer upper end of the trapping ware is equipped with the second rounded corner.
The setting of second rounded corner is also in order to reduce the deposition of particulate matter here when dust-contained airflow flows through, simultaneously
Reduce difficulty of processing.
In order to collect the Atmospheric particulates of different-grain diameter, the current stabilization lid in middle flow void whirlwind sampler of the present invention can
To be designed as series of products, water conservancy diversion column diameter is different in the series of products, and the current stabilization lid of different size is fixed on sampler
After body, different size of circular ring shape inlet channel can be formed.
It is described when flow is 27.5L/min, and sampler incising control is 2.5 μm in the embodiment of the present invention
The difference in diameter of diversion column and cylindrical type inlet chamber is 1mm.
Based on middle flow void whirlwind sampler above-mentioned, the present invention also provides a kind of application method of the sampler, it
Including following procedure,
(S1) current stabilization lid, sampler upper body, trap and sampler lower body are stacked into installation successively；
(S2) filter membrane clip is inserted into, attached in outlet chamber；
(S3) air inlet pipe of air extractor is connect with filter membrane clip gas outlet.
Beneficial effects of the present invention：
Middle flow void whirlwind sampler of the present invention can be used for Atmospheric particulates sampling.The sampler structure is reasonable,
Particulate matter and the probability that wall surface collides are relatively low, can mitigate in addition avoid the particulate matter separated and it is broken, to
The influence to particulate matter physicochemical property is reduced, is conducive to subsequent analysis and detects.Since the weak current containing bulky grain is in trap
It is formed and is vortexed, these particles are difficult to be carried under one's arms to leave trapping chamber by mainstream, it is possible to overcome the problems, such as particle settling flux；In addition, annular
The design of inlet channel and whole cylindrical design reduce difficulty of processing, are conducive to the utilization and popularization of the sampler, and
Cylindrical type outlet chamber then can be directly connected to the pipeline of follow-up equipment, and adapter need not be used.
Description of the drawings
Fig. 1 is the structural schematic diagram of middle flow void whirlwind sampler of the present invention；
Fig. 2 is the sectional view of middle flow void whirlwind sampler of the present invention；
Fig. 3 is the front view of current stabilization lid of the present invention；
Fig. 4 is the front view of sampler upper body of the present invention；
Fig. 5 is the enlarged drawing at A in Fig. 5 of the present invention；
Fig. 6 is the enlarged drawing at B in Fig. 5 of the present invention；
Fig. 7 is the front view of trap of the present invention；
Fig. 8 is the vertical view of trap of the present invention；
Fig. 9 is main sectional view when sampler upper body of the present invention is equipped with support column and trap；
Figure 10 is the enlarged drawing at C in Fig. 9 of the present invention；
Figure 11 is the front view of sampler lower body of the present invention；
Figure 12 is the performance test experiment flow schematic diagram of middle flow void whirlwind sampler of the present invention；
When Figure 13 is inlet flow rate Q=27.5L/min, the arresting efficiency curve of embodiment 1；
Figure 14 is inlet flow rate Q=27.5L/min, 1 continuous work of embodiment 4 hours, to 2.5 μm of particulate matter removal effects
Rate variation tendency；
In figure：Current stabilization lid 1；Head cover 1.1；Second through-hole 1.1.1；Second counterbore 1.1.2；Diversion column 1.2；Sampler upper body
2；Empty cyclonic chamber 2.1；First arc inner wall 2.1.1；Horizontal interior walls 2.1.2；Second arc inner wall 2.1.3；Cylindrical type inlet chamber
2.2；First rounded corner 2.2.1；Outer rim 2.3；First through hole 2.3.1；First counterbore 2.3.2；Group behave affectedly 2.4；Assemble a chamber
2.4.1；Assemble two chamber 2.4.2；Internal thread 2.4.3；Trap 3；Support ring 3.1；Trap ware 3.2；Second rounded corner 3.2.1；
Support chip 3.3；Sampler lower body 4；Outlet chamber 4.1；One chamber 4.1.1 of outlet；Two chamber 4.1.2 of outlet；Trap erecting bed 4.2；
Assembling grove 4.3；External screw thread 4.3.1；Cushion chamber 4.4；Buffer a chamber 4.4.1；Buffer two chamber 4.4.2；Support column 5；Third through-hole
5.1；First sealing ring 6；Second sealing ring 7.
Specific implementation mode
Below in conjunction with the attached drawing performance that the present invention will be described in detail, but they do not constitute limitation of the invention, only make
Citing.By specific embodiment, the present invention is described in further detail simultaneously.
Flow void whirlwind sampler in embodiment 1
Middle flow void whirlwind sampler as illustrated in fig. 1 and 2, it includes current stabilization lid 1, is equipped with empty cyclonic chamber 2.1 and cylinder
Sampler upper body 2, trap 3 and the sampler lower body 4 of type inlet chamber 2.2.The sampler is in whole cylinder design, described steady
Stream lid 1 is fixed on by four support columns 5 on sampler upper body 2, and trap 3 is equipped in the sampler upper body 2, described to adopt
Sample device lower body 4 is connect by screwing mode with sampler upper body 2.
As shown in Figs. 1-3, diversion column 1.2 of the current stabilization lid 1 by circular head cover 1.1 and positioned at 1.1 middle part of head cover forms.Institute
It states and is uniformly provided with the central point of four second through-holes 1.1.1, four through-hole 1.1.1 on head cover 1.1 and is located on same circumference,
Four through-hole 1.1.1 combine the second counterbore 1.1.2 having for being caught in 5 upper end of support column.The diversion column 1.2 is one
The cylinder of a diameter of 9mm is equipped with rounded corner with the junction of head cover 1.1, and diversion column 1.2 is inserted into sampler upper body when assembling
It does not contact in 1 but with the inner wall of sampler upper body 1.
As shown in Figures 4 and 5, sampler upper body 2 is equipped with the cylindrical type inlet chamber 2.2 of an a diameter of 10mm, the cylindrical type
The upper end of inlet chamber 2.2 extends outside to form outer rim 2.3, and the junction of 2.3 cylindrical type inlet chamber 2.2 of the outer rim is (i.e. round
The entrance of column type inlet chamber 2.2) it is equipped with the first rounded corner 2.2.1.Four first through hole are uniformly provided in the outer rim 2.3
2.3.1, the central point of four first through hole 2.3.1 is located on same circumference, and four first through hole 2.3.1 are combined
There is the first counterbore 2.3.2 for being caught in 5 lower end of support column.
As shown in figs. 2 and 9, in order to coordinate the assembling with current stabilization lid 1 and sampler upper body 2, support column 5 is equipped with third through-hole
5.1.When assembling, first by the lower end of support column 5 in the third resin-bonding of ring to the first counterbore 2.3.2, then by the upper end of support column 5
It is embedded into the second counterbore 1.1.2, finally by screw bolt passes first through hole 2.3.1, third through-hole 5.1 and the second through-hole
1.1.1, or the second through-hole 1.1.1, third through-hole 5.1 and first through hole 2.3.1 are sequentially passed through, nut is used in combination to tighten fixation.
After the current stabilization lid 1 and sampler upper body 2 are completed, the diversion column 1.2 is located in cylindrical type inlet chamber 1.2 and and cylinder
Type inlet chamber 1.2 forms annular inlet passageway.The lower end of the diversion column 1.2 is concordant with the lower end of cylindrical type inlet chamber 1.2.
As shown in figs. 4 and 6, sampler upper body 2 is additionally provided with the empty cyclonic chamber that upper end is connect with 2.2 lower end of cylindrical type inlet chamber
2.1 and the group that is connect with empty 2.1 lower end of cyclonic chamber of upper end behave affectedly 2.4.The void cyclonic chamber 2.1 is by sequentially connected first
Arc inner wall 2.1.1, horizontal interior walls 2.1.2 and the second arc inner wall 2.1.3 compositions, the first arc inner wall 2.1.1 and the
It is 90 ° that the diameter of two arc inner wall 2.1.3, which is 5mm, bending angle, wherein lower section is convex to the left by the first arc inner wall 2.1.1
It rises, towards trap 3, the second arc inner wall 2.1.3 is raised to upper right side.It behave affectedly 2.4 to be divided into for described group and supplies and catch
The one chamber 2.4.1 of assembling and the two chamber 2.4.2 of assembling for being assembled with sampler lower body 4 that storage 3 assembles；One chamber of the assembling
2.4.1 upper wall is extended outside by 2.1 lower end of empty cyclonic chamber, peripheral wall lower end and the assembling of one chamber 2.4.1 of the assembling
The peripheral wall upper end of two chamber 2.4.2 connects, and the peripheral wall of two chamber 2.4.2 of the assembling is equipped with internal thread 2.4.3.
As shown in FIG. 7 and 8, trap 3 includes support ring 3.1, peripheral wall outer upper end catching equipped with the second rounded corner 3.2.1
Collect ware 3.2, the trapping ware 3.2 is located at the middle part of support ring 3.1, and the trapping ware 3.2 is supported with support ring 3.1 by three
Piece 3.3 links together, and three support chips 3.3 are in bi-concave structure and are uniformly distributed, each two support chip 3.3 it
Between formed an engraved structure, pass through for air-flow.In the present embodiment, the thickness of three support chips 3.3 with support ring 3.1
Thickness is identical.
As shown in Figures 9 and 10, the trap 3 after assembling is located in sampler upper body 2, wherein support ring 3.1 and support chip
3.3 are located in one chamber 2.4.1 of assembling, and the peripheral wall of trapping ware 3.2 extend into empty cyclonic chamber 2.1 and is located at horizontal interior walls
2.1.2 lower section, the second rounded corner 3.2.1 are opposite with the second arc inner wall 2.1.3.To ensure air-tightness, the support ring 3.1
Outside be fixed with the second sealing ring 7, the thickness of second sealing ring 7 is equal with 3.1 thickness of support ring.
In order to be limited from 3 lower section of trap to trap 3, sampler lower body 4 as shown in figure 11 is equipped with trap
Saddle 4.2, the support ring 3.1 and the second sealing ring 7 are respectively positioned on trap saddle 4.2 and assembling one chamber 2.4.1 upper walls composition
Cavity in.And in order to coordinate the installation with sampler upper body 2, sampler lower body 4 to be additionally provided with assembling grove 4.3, the assembling grove
4.3 are opened in the upper periphery of sampler lower body 4, and the peripheral wall of the assembling grove 4.3 is equipped with what confession was screwed with internal thread 2.4.3
External screw thread 4.3.1.
As shown in figure 11, it is made of cushion chamber 4.4 and outlet chamber 4.1 inside sampler lower body 4.The cushion chamber 4.4 wraps
It is in cylindrical structure, two chambers of the buffering to include one chamber 4.4.1 of buffering and buffering two chamber 4.4.2, one chamber 4.4.1 of the buffering
4.4.2 it is in the circular platform type structure of " up big and down small ", the upper end connect with the upper end for buffering a chamber 4.4.1, its lower end and outlet chamber
4.1 connection.The outlet chamber 4.1 includes one chamber 4.1.1 of the outlet and outlet two chamber 4.1.2 for being in cylindrical structure, it is described go out
The internal diameter of one chamber 4.1.1 of gas is slightly less than the internal diameter of two chamber 4.1.2 of outlet, in two chamber 4.1.2 of the outlet there are two right angle settings
First sealing ring 6.
In use, current stabilization lid 1, sampler upper body 2, trap 3 and sampler lower body 4 stack successively, 1 He of current stabilization lid
It is supported by support column 5 between sampler upper body 2.Middle insertion is commercially available existing in the two chamber 4.1.2 of outlet of outlet chamber 4.1
Filter membrane clip.After the air inlet pipe of air extractor is connect with filter membrane clip gas outlet, air extractor is started to work, and gas is via diversion column
1.2 annular inlet passageways formed with cylindrical type inlet chamber 2.1 enter sampler.Into after empty cyclonic chamber 2.1, grain size is larger
Particle is trapped in since effect of inertia keeps original direction of motion in trapping ware 3.2；The smaller particle of grain size is then with air-flow
Cushion chamber 4.4 is passed through in the change in direction, final to be collected on the filter membrane of filter membrane clip, to realize cascade sampling.
2 sampler performance test of embodiment is tested：
Figure 12 is inventive energy test experiments flow diagram.In experiment using the High Purity Nitrogen of clean (99.999%) as
Carrier gas source, nitrogen are ejected by aerosol generator with certain pressure and flow, by the standard PSL containing single particle size
The aqueous isopropanol concussion of particle is broken into many small drops, is then removed by heat drying pipe and carries aerosol particle
Air-flow in isopropanol and moisture, formed monodisperse aerosol particle.Standard particle after drying fills in dilution buffer bottle
Divide dilution mixing (diluent gas is the pure air filtered by Pall-12144 type HEPA filters), carries particle later
The gas of object enters sampling test box.When carrying out sampler efficiency test, sampler is measured respectively using aerosol grain size spectrometer
The particle concentration of upstream and downstream, then two values are divided by and can be obtained the particulate matter penetrance of sampler.Whole system is by vacuum pump
Power is provided.
When Figure 13 is inlet flow rate Q=27.5L/min, the arresting efficiency curve of embodiment 1.It can be with by the efficiency curve
Deduce, incising control of the middle flow void whirlwind sampler in inlet flow rate Q=27.5L/min described in embodiment 1 is 2.5 μm.
Figure 14 is inlet flow rate Q=27.5L/min, 1 continuous work of embodiment 4 hours, to 2.5 μm of particulate matter removal effects
Rate change trend curve.Middle flow void whirlwind sampler working efficiency described in embodiment 1 is can be seen that by the figure to stablize, it can
To carry out long-time sampling.
Claims (16)
- Flow void whirlwind sampler in 1., it is characterised in that：It include the current stabilization lid being made of head cover (1.1) and diversion column (1.2) (1), it the sampler upper body (2) for being equipped with empty cyclonic chamber (2.1), the trap (3) being located in sampler upper body (2) and is equipped with The sampler lower body (4) of outlet chamber (4.1), the current stabilization lid (1), sampler upper body (2), trap (3) and sampler lower body (4) it stacks and removably connects successively；The sampler upper body (2) is additionally provided with the cylindrical type inlet chamber (2.2) being inserted into for diversion column (1.2), the diversion column (1.2) cooperatively form circular ring shape inlet channel with cylindrical type inlet chamber (2.2), the upper end of the cylindrical type inlet chamber (2.2) to Periphery extends to form outer rim (2.3), several support columns for being used to support head cover (1.1) are equipped on the outer rim (2.3) (5)。
- 2. middle flow void whirlwind sampler according to claim 1, it is characterised in that：It is described void cyclonic chamber (2.1) by according to The first arc inner wall (2.1.1), horizontal interior walls (2.1.2) and the second arc inner wall (2.1.3) composition of secondary connection；Described first The upper end of arc inner wall (2.1.1) is connect with the lower end of cylindrical type inlet chamber (2.2), the first arc inner wall (2.1.1) court To trap (3) protrusion, the protrusion of the protrusion direction and the first arc inner wall (2.1.1) of second arc inner wall (2.1.3) Direction is opposite.
- 3. middle flow void whirlwind sampler according to claim 2, it is characterised in that：First arc inner wall The bending angle of (2.1.1) and the second arc inner wall (2.1.3) is 90 °.
- 4. middle flow void whirlwind sampler according to claim 3, it is characterised in that：The cylindrical type inlet chamber (2.2) Entrance be equipped with the first rounded corner (2.2.1).
- 5. middle flow void whirlwind sampler according to claim 4, it is characterised in that：The corresponding support of the outer rim (2.3) First through hole (2.3.1) is equipped at column (5) lower end, the head cover (1.1) is equipped with the second through-hole at corresponding support column (5) upper end (1.1.1), and the support column (5) is equipped with third through-hole (5.1)；The head cover (1.1) is fixed on branch by screw bolt and nut On dagger (5), the bolt passes through first through hole (2.3.1), third through-hole (5.1) and the second through-hole (1.1.1).
- 6. middle flow void whirlwind sampler according to claim 5, it is characterised in that：Several described first through hole (2.3.1) combination has opening up the first counterbore (2.3.2), the lower ends of several support columns (5) is respectively positioned on the In one counterbore (2.3.2).
- 7. middle flow void whirlwind sampler according to claim 6, it is characterised in that：Several described second through-holes (1.1.1) combination has downward opening second counterbore (1.1.2), and the upper end of several support columns (5) is respectively positioned on second In counterbore (1.1.2).
- 8. the middle flow void whirlwind sampler according to any one of claim 5-7, it is characterised in that：On the sampler The lower part of body (2) is additionally provided with group and behave affectedly (2.4), described group behave affectedly (2.4) include for one chamber of assembling that is assembled with trap (3) (2.4.1) and two chamber of assembling (2.4.2) for being assembled with sampler lower body (4)；The upper wall of one chamber of the assembling (2.4.1) is by void Cyclonic chamber (2.1) lower end extends outside, peripheral wall lower end and two chambers of assembling (2.4.2) of one chamber of the assembling (2.4.1) Peripheral wall upper end connection, it is described assembling two chambers (2.4.2) peripheral wall be equipped with internal thread (2.4.3).
- 9. middle flow void whirlwind sampler according to claim 8, it is characterised in that：The top of the sampler lower body (4) End face is equipped with trap saddle (4.2), and the upper periphery of the sampler lower body (4) is equipped with assembling grove (4.3), the assembling grove (4.3) peripheral wall is equipped with the external screw thread (4.3.1) for being screwed with internal thread (2.4.3).
- 10. middle flow void whirlwind sampler according to claim 9, it is characterised in that：The sampler lower body (4) also sets It includes in one chamber of buffering (4.4.1) of cylindrical structure and in frustum cone structure to have cushion chamber (4.4), the cushion chamber (4.4) Buffer two chambers (4.4.2)；The lower end of two chambers of the buffering (4.4.2) is connect with the upper end of outlet chamber (4.1).
- 11. middle flow void whirlwind sampler according to claim 10, it is characterised in that：The outlet chamber (4.1) includes It is in one chamber of outlet (4.1.1) and two chamber of outlet (4.1.2) of cylindrical structure；The internal diameter of one chamber of the outlet (4.1.1) is small It is supplied and fixed filter membrane clip in being vertically installed with several in the internal diameter of two chamber of outlet (4.1.2), two chamber of the outlet (4.1.2) First sealing ring (6).
- 12. the middle flow void whirlwind sampler according to any one of claim 9-11, it is characterised in that：The trap (3) include support ring (3.1), be located at support ring (3.1) in trapping ware (3.2) and several both ends respectively with support ring (3.1) and trapping ware (3.2) connect support chip (3.3)；The support ring (3.1) is located at trap saddle (4.2) and assembling In the cavity of one chamber (2.4.1) upper wall composition, and the peripheral wall of the trapping ware (3.2) is extend into empty cyclonic chamber (2.1) and position In the lower section of horizontal interior walls (2.1.2).
- 13. middle flow void whirlwind sampler according to claim 12, it is characterised in that：The support ring (3.1) and group It fills and the second sealing ring (7) is installed between the peripheral wall of a chamber (2.4.1).
- 14. middle flow void whirlwind sampler according to claim 13, it is characterised in that：The week of the trapping ware (3.2) Wall outer upper end is equipped with the second rounded corner (3.2.1).
- 15. middle flow void whirlwind sampler according to claim 14, it is characterised in that：When flow be 27.5L/min, adopt When sample device incising control is 2.5 μm, the difference in diameter of the diversion column (1.2) and cylindrical type inlet chamber (2.2) is 1mm.
- 16. the application method of any one of the claim 1-15 middle flow void whirlwind samplers, it is characterised in that：Including with Lower process,(S1) current stabilization lid (1), sampler upper body (2), trap (3) and sampler lower body (4) are stacked into installation successively；(S2) filter membrane clip is inserted into, attached in outlet chamber (4.1)；(S3) air inlet pipe of air extractor is connect with filter membrane clip gas outlet.
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| CN201810873080.XA CN108760414B (en) | 2018-08-02 | 2018-08-02 | Medium flow virtual cyclone sampler and use method thereof |
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| CN201810873080.XA CN108760414B (en) | 2018-08-02 | 2018-08-02 | Medium flow virtual cyclone sampler and use method thereof |
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| CN108760414B CN108760414B (en) | 2023-11-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112051114A (en) * | 2020-08-27 | 2020-12-08 | 苏州质达飞检测科技有限公司 | Handheld smoke particulate matter sampling device and method |
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| CN112051114A (en) * | 2020-08-27 | 2020-12-08 | 苏州质达飞检测科技有限公司 | Handheld smoke particulate matter sampling device and method |
| CN112051114B (en) * | 2020-08-27 | 2023-08-18 | 苏州质达飞检测科技有限公司 | Handheld flue gas particulate sampling device and method |
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| CN108760414B (en) | 2023-11-17 |
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