CN116878977A - Particulate matter detection device and sampling method - Google Patents
Particulate matter detection device and sampling method Download PDFInfo
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- CN116878977A CN116878977A CN202311097394.2A CN202311097394A CN116878977A CN 116878977 A CN116878977 A CN 116878977A CN 202311097394 A CN202311097394 A CN 202311097394A CN 116878977 A CN116878977 A CN 116878977A
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- 238000001514 detection method Methods 0.000 title claims abstract description 51
- 238000005070 sampling Methods 0.000 title claims abstract description 46
- 239000013618 particulate matter Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 43
- 238000001914 filtration Methods 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims description 109
- 239000002245 particle Substances 0.000 claims description 54
- 210000001503 joint Anatomy 0.000 claims description 28
- 230000005855 radiation Effects 0.000 claims description 15
- 238000004804 winding Methods 0.000 claims description 12
- 238000000926 separation method Methods 0.000 claims description 11
- 230000008859 change Effects 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000000523 sample Substances 0.000 description 95
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000005250 beta ray Effects 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 208000034699 Vitreous floaters Diseases 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000005802 health problem Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- 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
- G01N1/2205—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with filters
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- 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
- G01N1/2273—Atmospheric sampling
-
- 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
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Engineering & Computer Science (AREA)
- Dispersion Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The application relates to the technical field of air quality detection, and provides a particulate matter detection device and a sampling method, wherein the particulate matter detection device comprises a shell, and further comprises a collection mechanism, a filtering mechanism and a detection mechanism, wherein the collection mechanism is arranged in the shell and is used for sampling and collecting a gas sample, the filtering mechanism is used for filtering large particulate matters in air, the influence of the particulate matters with overlarge diameters on a detection result is avoided, the detection mechanism is used for detecting the air passing through the filtering mechanism, the collection mechanism comprises a division groove, a grid baffle plate, a motor I and a gas collecting assembly, the division groove is arranged on the collection mechanism, the grid baffle plate is rotatably arranged inside the division groove, the motor I is arranged on the division groove, and the gas collecting assembly is used for storing the gas sample.
Description
Technical Field
The application relates to the technical field of air quality detection, in particular to a particulate matter detection device and a sampling method.
Background
The quality of the air reflects the concentration of pollutants in the air, the detection of the air quality mainly comprises the measurement of the content and concentration of floaters in the air, the amplification of pollutant discharge from various pollution sources is a main factor affecting the air quality, the particles (PM for short) in the air are the mixture of suspended solid particles and small liquid drops, serious health problems are caused by inhalable human diseases, the particles with great harm to the human body are PM2.5, and in order to measure the concentration and type of the particles in the air, a particle detection device is arranged everywhere to sample the air and measure the particles.
The detection methods mainly used at present are various, such as a filter membrane weighing method and a Beta ray absorption method, wherein the filter membrane weighing method is complex in operation, heavy and time-consuming in an instrument, but the detection result is very accurate, the Beta ray absorption method is convenient to carry, the detection result is obtained quickly and can be used for continuous measurement, but the detection result of the Beta ray absorption method is lower in accuracy than the detection result obtained by the filter membrane weighing method, a large amount of gas is often required to be sampled for obtaining an accurate detection result, the sampled gas is detected by using a precise instrument, but pollutants in the air drift along with the air flow, are not uniformly floated in the air environment, so that a large amount of repeated samples are collected for carrying out a large amount of detection, and a particle detection device capable of carrying out air sampling when the particle mass in the air is greatly changed is needed.
Disclosure of Invention
The application provides a particulate matter detection device and a sampling method, which solve the problem that gas sample collection cannot be carried out when the air quality change is large in the related technology.
The technical scheme of the application is as follows:
a particulate matter detection device, comprising a housing, further comprising:
the collecting mechanism is arranged in the shell and is used for sampling and collecting the gas sample;
the filtering mechanism passes through the top of the shell and is used for filtering large particles in the air;
the detection mechanism is arranged inside the shell and is used for detecting air passing through the filtering mechanism;
wherein, collection mechanism includes:
the shunt groove is arranged on the collecting mechanism;
the grid baffle is rotatably arranged in the shunt groove;
the first motor is arranged on the shunt groove, and the grid baffle plate is fixedly arranged with the output end of the first motor;
and the gas collection assembly is used for storing the gas sample.
The gas collection assembly includes:
the air duct is rotationally arranged at the side of the shunt groove, and an opposite port is arranged at one end, far away from the shunt groove, of the air duct;
the placing groove is arranged in the shell, and a through hole is formed in one end, close to the shunt groove, of the placing groove;
sample bottle, sample bottle is provided with a plurality of, sample bottle can dismantle the setting and be in on the standing groove, sample bottle is used for sealed deposit sample gas.
The sample bottle is provided with:
a bottle mouth;
the bottle bottom is provided with a groove matched with the bottle mouth;
the first sealing piece is arranged inside the sample bottle and penetrates through the bottle opening;
the second sealing sheet is arranged outside the sample bottle, penetrates through the groove at the bottom of the bottle, and is identical to the second sealing sheet in shape;
the fixing piece is arranged inside the sample bottle and fixedly arranged with the sealing piece I and the sealing piece II.
The bottle neck fixing device is characterized in that a first spring is arranged between the fixing piece and the bottle neck, a second spring is arranged between the fixing piece and the bottle neck, the first spring pulls the fixing piece to the direction of the bottle neck, and the second spring pushes the fixing piece to the direction of the bottle neck.
The detection mechanism includes:
a filter belt;
the rolling wheel is arranged on the shell, and the filter belt is arranged on the rolling wheel;
the output end of the second motor is fixedly arranged with the winding wheel;
a radiation source disposed on the housing;
a detector disposed on the housing, the detector disposed above the radiation source, the filter belt disposed between the radiation source and the detector;
the sampling nozzle is arranged at the bottom of the shunt groove, and the sampling nozzle and the shunt groove are arranged in a sliding mode.
The filtering mechanism comprises:
a particle cutter for filtering larger diameter particles;
the heater is arranged at the lower part of the particle cutter, and one end, far away from the particle cutter, of the heater is fixedly arranged with the shunt groove.
The bottle comprises a bottle neck, a first sealing sheet and a second sealing sheet, wherein the first sealing sheet is attached to one side of the bottle neck in a sample bottle, the second sealing sheet is attached to one side of the bottle neck outside the sample bottle, a support arm which extends out of the bottle neck in the direction away from the bottle neck is arranged on the first sealing sheet, and a support arm which extends out of the bottle neck in the direction away from the bottle neck is arranged on the second sealing sheet.
The butt joint mouth is matched with the bottle mouth in shape, the butt joint mouth is detachably arranged with the placing groove, and a supporting rod matched with the supporting arm of the first sealing piece is arranged in the butt joint mouth.
The shell is provided with:
the air pump is arranged at the lower part of the placing groove, and an air outlet hole on the air pump is communicated with the shell;
the first cover door is arranged on one side, close to the detector, of the shell and is rotatably arranged with the shell;
and the second cover door is arranged on one side, close to the placing groove, of the shell and is rotatably arranged with the shell.
The particle detection sampling method uses the particle detection device, and comprises the following steps:
firstly, detecting and preparing, namely placing a plurality of sample bottles in a vertical state, enabling the bottle mouths of the sample bottles to face the same direction, enabling the bottle mouths of the sample bottles to extend into bottle bottoms of the sample bottles adjacent to the bottle mouths, installing the connected sample bottles in a placing groove, enabling the bottle bottoms of the sample bottles to be in butt joint with one end of the placing groove, which is close to a shunt groove, of the sample bottles, enabling a butt joint to be in butt joint with the bottle mouths of the sample bottles, enabling a supporting rod in the butt joint to press a supporting arm on a sealing plate I in the bottle mouths connected with the butt joint, enabling the sealing plate I to push the sealing plate II and a fixing plate to move in the sample bottles, enabling the fixing plate to stretch a spring I, compressing the supporting arm on the sealing plate II in the bottle bottoms to press the sealing plate I in the bottle mouths which are in butt joint with the sealing plate I, enabling the sealing plate II in each sample bottle to be separated from the bottle mouths, and enabling a cover door I and the cover door II to be sealed in a closed mode;
step two, gas detection, in which a gas pump starts to inhale gas, the gas is discharged from a shell at a gas outlet, the gas enters the shell through a filtering mechanism, larger particles are filtered out through a particle cutter, the gas heats the air through a heater to reduce the moisture in the air, the air enters a sampling nozzle through a shunt groove to be sprayed on a filter belt, the particles in the air are attached to the filter belt, a rolling wheel drives the filter belt to move, and the filter belt detects the particles on the filter belt when passing between a radiation source and a detector;
step three, sample collection, when detecting that the content of particulate matters in the gas has great change, motor one starts and drives check separation blade and rotate, check separation blade is led to the pipeline of sampling nozzle with the splitter box and is blocked, the splitter box is linked together with the air duct, gas passes through the air duct and gets into in the sample bottle through the splitter box, gas passes through all sample bottles in proper order, gas gets into the casing in the through-hole that the standing groove is close to splitter box one end, gas in the casing gets into the air pump and discharges the casing through the gas outlet of air pump, after the sampling is accomplished, open lid door second and separate butt joint and standing groove, bracing piece and the support arm separation on the sealing plate one in the butt joint, sealing plate one and sealing plate two remove under the effect of spring one and spring two, sealing plate one and bottleneck inboard contact, sealing plate two are contacted with the bottle bottom outside, the sample bottle is sealed.
The working principle and the beneficial effects of the application are as follows:
1. according to the application, the flow direction of air passing through the particle cutter and the heater can be changed by arranging the shunt grooves and the grid baffle plates and driving the grid baffle plates to rotate through the motor I, the air pump is arranged in the shell, the air inlet pipe on the air pump is not connected with the sampling nozzle and the placing groove, when the air pump sucks air in the shell, the air enters the shell through the sampling nozzle or the placing groove under the action of air pressure and is discharged out of the shell through the air outlet hole, particulate matters are filtered on the filter belt for detection through the filter belt when the air enters the shell through the sampling nozzle, the air can be sampled through the sample bottle entering the shell, and meanwhile, the air passing through the inside of the shell can be used for heat dissipation inside the device;
2. according to the application, the first sealing piece and the second sealing piece in the sample bottles are arranged, when the bottle mouths of the two sample bottles are butted with the bottle bottoms, the support arm of the first sealing piece in the bottle mouths is butted with the support arm of the second sealing piece in the bottle bottoms, when the bottle mouths are butted, the support rod in the butt joint port is butted with the support arm of the first sealing piece and pushes the first sealing piece, the fixing piece and the second sealing piece to move in the sample bottles, and as the first sealing piece is butted with the second sealing piece in the two butted sample bottles, the sealing piece in all the butted sample bottles is separated from the bottle mouths and the second sealing piece is separated from the bottle bottoms, at the moment, sample gas can circulate between each sample bottle through the butt joint port, and when the butt joint port is separated from the bottle mouths, the first sealing piece is butted with the bottle mouths and the second sealing piece is butted with the bottle bottoms under the action of the spring, so that the sealing of sample gas in the sample bottles is realized;
3. according to the application, the concentration of the air particulate matters can be rapidly detected by arranging the detection mechanism, the air is sampled according to the air quality control of real-time monitoring, the sample bottles are arranged in the placing groove to carry out inflation sampling on a plurality of sample bottles, and when the sample bottles are taken down, the inside of the sample bottles can be automatically sealed, so that the influence of external air entering on the sampling result is avoided.
Drawings
The application will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic view of the internal structure of a shell in section in the present application;
FIG. 2 is a schematic view of a collecting device according to the present application;
FIG. 3 is a schematic diagram of the mating structure of the placement tank, sample bottle and interface of the present application;
FIG. 4 is a schematic cross-sectional view of a sample bottle according to the present application;
FIG. 5 is a schematic cross-sectional view of multiple sample bottles of the present application;
FIG. 6 is a schematic view of the structure of the inside of the housing according to the present application;
FIG. 7 is a schematic diagram of the overall structure of the present application;
fig. 8 is a schematic view of another view structure of the whole of the present application.
In the figure: 1. a housing; 2. a shunt channel; 3. a grid baffle; 4. a first motor; 5. an air duct; 6. a placement groove; 7. a sample bottle; 8. a bottle mouth; 9. a bottle bottom; 10. a first sealing sheet; 11. a second sealing sheet; 12. a fixing piece; 13. a first spring; 14. a second spring; 15. a filter belt; 16. a winding wheel; 17. a second motor; 18. a radiation source; 19. a detector; 20. a sampling nozzle; 21. a particle cutter; 22. a heater; 23. an interface; 24. an air pump; 25. an air outlet hole; 26. a first cover door; 27. a second cover door; 28. a buckle; 29. a temperature probe.
Detailed Description
The technical solutions of the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Examples
As shown in fig. 1 to 8, this embodiment provides a particulate matter detection device, including casing 1, still including collecting mechanism, filtering mechanism and detection mechanism, collecting mechanism sets up in casing 1, collecting mechanism is used for sampling and collecting the gas sample, filtering mechanism passes casing 1 top, filtering mechanism is used for filtering the big particulate matter in the air, avoid the too big particulate matter of diameter to cause the influence to the testing result, detection mechanism sets up inside casing 1, detection mechanism is used for detecting the air through filtering mechanism, wherein, collecting mechanism includes the splitter box 2, check separation blade 3, motor one 4 and gas collecting module, splitter box 2 sets up on collecting mechanism, check separation blade 3 rotates and sets up inside splitter box 2, motor one 4 sets up on splitter box 2, check separation blade 3 and the fixed setting of output of motor one 4, gas collecting module is used for storing the gas sample, splitter box 2 lower extreme and sampling nozzle 20 intercommunication, the side is rotated to check that leads to splitter box 2 to air duct 5 when splitter box 2 side, motor one side is kept off 3, gas flow to the baffle 20, one side that the air duct 5 is led to in the splitter box 2 is rotated to the baffle 20, motor one side is kept off 3, after the baffle 3 rotates to one side of baffle 3, the baffle plate 3 is rotated to the baffle 20.
As shown in fig. 2 to 5, the gas collecting assembly comprises a gas guide tube 5, a placing groove 6 and sample bottles 7, the gas guide tube 5 is rotatably arranged at the side of the dividing groove 2, one end, far away from the dividing groove 2, of the gas guide tube 5 is provided with a butt joint port 23, the placing groove 6 is arranged inside the shell 1, one end, close to the dividing groove 2, of the placing groove 6 is provided with a through hole, the through hole corresponds to the bottle bottom 9, the sample bottles 7 are provided with a plurality of sample bottles 7, the sample bottles 7 are detachably arranged on the placing groove 6, the sample bottles 7 are used for sealing and storing sample gas, the sample bottles 7 are provided with bottle mouths 8, bottle bottoms 9, first sealing sheets 10, second sealing sheets 11 and fixing sheets 12, the bottle bottoms 9 are provided with grooves matched with the bottle mouths 8, the first sealing sheets 10 are arranged inside the sample bottles 7, the first sealing sheets 10 penetrate through the bottle mouths 8, the second sealing sheets 11 are arranged outside the sample bottles 7, the second sealing sheets 11 penetrate through the grooves of the bottle bottoms 9, the shape of the first sealing piece 10 is the same as that of the second sealing piece 11, the first sealing piece 12 is arranged in the sample bottle 7, the first sealing piece 10 and the second sealing piece 11 are fixedly arranged, a first spring 13 is arranged between the first sealing piece 12 and the bottle mouth 8, a second spring 14 is arranged between the first sealing piece 12 and the bottle bottom 9, the first spring 13 pulls the first sealing piece 12 towards the bottle mouth 8, the second spring 14 pushes the first sealing piece 12 towards the bottle mouth 8, the first sealing piece 10 is attached to one side of the bottle mouth 8 in the sample bottle 7, the second sealing piece 11 is attached to one side of the bottle bottom 9 outside the sample bottle 7, a support arm which extends out of the bottle mouth 8 towards the direction away from the bottle bottom 9 is arranged on the first sealing piece 10, a support arm which extends out of the bottle bottom 9 towards the direction away from the bottle mouth 8 is arranged on the second sealing piece 11, the butt joint opening 23 is matched with the shape of the bottle mouth 8, the butt joint 23 is detachably arranged with the placing groove 6, the support rod matched with the support arm of the first sealing piece 10 is arranged in the opposite joint 23, when the sample bottle 7 is installed in the placing groove 6, the bottle bottom 9 of the sample bottle 7 is jointed with the through hole on the placing groove 6, the bottle mouths 8 of a plurality of sample bottles 7 are extended into the bottle bottoms 9 of other sample bottles 7, the butted sample bottles 7 are placed in the placing groove 6, the support arm of the first sealing piece 10 at the bottle mouths 8 of the two butted sample bottles 7 is abutted with the support arm of the second sealing piece 11 at the bottle bottom 9 when the plurality of sample bottles 7 are butted, the bottle mouths 8 of the sample bottles 7 close to the opposite joint 23 are butted with the opposite joint 23, the support rod fixedly arranged in the opposite joint 23 extrudes the support arm of the first sealing piece 10, the first sealing piece 10 drives the fixing piece 12 and the second sealing piece 11 in the sample bottle 7 to move in the extrusion process, the first spring 13 is stretched, the spring II 14 is extruded, the sealing sheet II 10 is separated from the inner side of the bottle mouth 8, the sealing sheet II 11 is separated from the outer side of the bottle bottom 9, gas circulation can be carried out in the sample bottle 7, the sealing sheet II 11 in the sample bottle 7 is extruded by the sealing sheet II 11 in the sample bottle 7 which is butted with the sealing sheet II simultaneously and slides in the sample bottle 7, so that when the interface 23 is butted with the bottle mouth 8 of the sample bottle 7, all sample bottles 7 are internally communicated, gas can sequentially enter all sample bottles 7 through the interface 23 and enter the shell 1 in the through holes of the placing groove 6, the buckle 28 is rotationally arranged on the interface 23, the spring is arranged between the buckle 28 and the interface 23, a groove corresponding to the buckle 28 is arranged at the bottom of the placing groove 6, and the buckle 28 can be clamped on the groove to prevent the interface 23 from being separated from the sample bottle 7 when the interface 23 is butted with the sample bottle 7.
As shown in fig. 1 and 6, the detection mechanism includes a filter belt 15, a winding wheel 16, a second motor 17, a radiation source 18, a detector 19 and a sampling nozzle 20, the winding wheel 16 is arranged on the housing 1, the filter belt 15 is arranged on the winding wheel 16, the output end of the second motor 17 is fixedly arranged with the winding wheel 16, the radiation source 18 is arranged on the housing 1, the detector 19 is arranged above the radiation source 18, the filter belt 15 is arranged between the radiation source 18 and the detector 19, the sampling nozzle 20 is arranged at the bottom of the shunt tank 2, the sampling nozzle 20 and the shunt tank 2 are slidably arranged, a housing is arranged outside the sampling nozzle 20, particles are prevented from flowing to other positions of the filter belt 15 when air enters the housing 1 through the sampling nozzle 20, the sampling result is influenced, a base matched with the housing on the sampling nozzle 20 is arranged below the sampling nozzle 20, the filter belt 15 is prevented from moving away from the lower part of the sampling nozzle 20 by the base between the base and the sampling nozzle 20, the electric cylinder is arranged on the housing 1, the electric cylinder is connected with the output end of the electric motor 15 on the sampling nozzle 20, and the electric cylinder is conveniently replaced by driving the electric motor 15 to rotate the two winding nozzles 15 when the electric motor 15 rotates the filter belt 15 to rotate to the two sides of the filter belt 15.
As shown in fig. 7 to 8, the filtering mechanism includes a particle cutter 21 and a heater 22, the particle cutter 21 is used for filtering particles with larger diameter, the heater 22 is disposed at the lower part of the particle cutter 21, one end of the heater 22 far away from the particle cutter 21 is fixedly disposed with the shunt tank 2, wherein the particle cutter 21 is used as the prior art, the particle cutter 21 is composed of a multi-layer structure, the air pump drives air flow to pass through the particle cutter 21 from top to bottom, when the air flow passes through the gaps among the multi-layer structures in the particle cutter 21, because the gaps are smaller than the air inlet hole area on the particle cutter 21, the air flow speed is accelerated when passing through the gaps, so that the particles in the air have certain kinetic energy, the large particles impact on the inside of the particle cutter 21 under the action of centrifugal force and are separated from the air flow to remain in the particle filter 21, so as to realize the filtering of the large particles in the air, and the specific structure of the particle cutter 21 is not used as the main innovation point of the application.
The air pump 24, the first cover door 26 and the second cover door 27 are arranged on the shell 1, the air pump 24 is arranged at the lower part of the placing groove 6, the air outlet hole 25 on the air pump 24 is communicated with the shell 1, the first cover door 26 is arranged on one side of the shell 1, which is close to the detector 19, the first cover door 26 is rotatably arranged with the shell 1, the second cover door 27 is arranged on one side of the shell 1, which is close to the placing groove 6, the second cover door 27 is rotatably arranged with the shell 1, the first cover door 26 and the second cover door 27 are in threaded connection with the shell 1 through bolts, the first cover door 26 and the second cover door 27 are in threaded connection with the shell 1 through threads when air quality detection is carried out, so that the shell 1 is sealed through the first cover door 26 and the second cover door 27, when the air pump 24 is used for sucking air, external air enters the diversion groove 2 through the heater 22, then enters the shell 1 through the sample bottle 7 or the sampling nozzle 20, and the air in the shell 1 enters the air pump 24 and is discharged out of the shell 1 through the air outlet hole 25.
The particle detection sampling method uses the particle detection device, and comprises the following steps:
firstly, detecting and preparing, namely placing a plurality of sample bottles 7 in a vertical state, enabling the bottle mouths of the sample bottles 7 to face the same direction, enabling the bottle mouths 8 of the sample bottles 7 to extend into bottle bottoms 9 of the sample bottles 7 adjacent to the sample bottles 7, installing the connected sample bottles 7 in a placing groove 6, enabling the bottle bottoms 9 of the sample bottles 7 to be in butt joint with one end of the placing groove 6 close to a shunt groove 2, butt joint with the bottle mouths 8 of the sample bottles 7, enabling a supporting rod in the butt joint to press a supporting arm on a sealing sheet I10 in the bottle mouths 8 connected with the butt joint, enabling the sealing sheet I10 to push a sealing sheet II 11 and a fixing sheet 12 to move in the sample bottles 7, enabling the fixing sheet 12 to stretch a spring I13, compressing a spring II 14, enabling the supporting arm on the sealing sheet II 11 in the bottle bottom 9 to press a sealing sheet I10 in the bottle mouths 8, enabling the sealing sheet II 11 in each sample bottle 7 to be separated from the bottle bottom 9, and enabling a cover door I26 to be sealed with a cover door II 27;
step two, gas detection, in which the air pump 24 starts to suck gas, the gas is discharged from the shell 1 through the air outlet hole 25, the gas enters the shell 1 through the filtering mechanism, larger particles are filtered out through the particle cutter 21, the gas heats the air through the heater 22 to reduce the moisture in the air, the air enters the sampling nozzle 20 through the shunt groove 2 to be sprayed on the filter belt 15, the particles in the air are attached to the filter belt 15, the filter belt 15 is driven by the winding wheel 16 to move, and the particles on the filter belt 15 are detected when the filter belt 15 passes between the radiation source 18 and the detector 19;
step three, sample collection, when detecting that the content of particles in the gas has great change, motor one 4 starts to drive check separation blade 3 to rotate, check separation blade 3 blocks the pipeline that shunt groove 2 led to sampling nozzle 20, shunt groove 2 and air duct 5 are linked together, gas gets into sample bottle 7 through shunt groove 2 through air duct 5, gas passes through all sample bottles 7 in proper order, gas gets into casing 1 in the through-hole that standing groove 6 is close to shunt groove 2 one end, gas in casing 1 gets into air pump 24 and discharges casing 1 through the gas outlet of air pump 24, after the sampling is accomplished, will butt joint and standing groove 6 separate after opening lid two 27, the bracing piece in the butt joint separates with the support arm on the sealing plate one 10, sealing plate one 10 and sealing plate two 11 move under the effect of spring one 13 and spring two 14, sealing plate one 10 contacts with bottleneck 8 inboard, sealing plate two 11 contacts with bottle bottom 9 outside, sample bottle 7 is sealed.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the application.
Claims (10)
1. Particulate matter detection device, including casing (1), characterized by still includes:
a collection mechanism provided in the housing (1) for sampling and collecting a gas sample;
the filtering mechanism is arranged on the shell (1) in a penetrating way and is used for filtering large particles in air;
the detection mechanism is arranged inside the shell (1) and is used for detecting air passing through the filtering mechanism;
wherein, collection mechanism includes:
the shunt groove (2) is arranged on the collecting mechanism;
the grid baffle plates (3) are rotatably arranged in the shunt grooves (2);
the first motor (4) is arranged on the shunt groove (2), and the grid baffle (3) and the output end of the first motor (4) are fixedly arranged;
and the gas collection assembly is used for storing the gas sample.
2. The particulate matter detection device of claim 1, wherein the gas collection assembly comprises:
the air duct (5), the air duct (5) rotates and sets up in the side of the said splitter box (2), one end far away from said splitter box (2) on the said air duct (5) has interfaces (23);
the placing groove (6) is formed in the shell (1), and a through hole is formed in one end, close to the shunt groove (2), of the placing groove (6);
sample bottle (7), sample bottle (7) are provided with a plurality of, sample bottle (7) can dismantle the setting and be in on standing groove (6), sample bottle (7) are used for sealed deposit sample gas.
3. A particulate matter detection device according to claim 2, characterized in that the sample bottle (7) is provided with:
a bottle mouth (8);
the bottle comprises a bottle bottom (9), wherein the bottle bottom (9) is provided with a groove matched with a bottle opening (8);
a first sealing sheet (10), wherein the first sealing sheet (10) is arranged inside the sample bottle (7), and the first sealing sheet (10) passes through the bottle opening (8);
the second sealing sheet (11) is arranged outside the sample bottle (7), the second sealing sheet (11) penetrates through the groove of the bottle bottom (9), and the first sealing sheet (10) and the second sealing sheet (11) are identical in shape;
the fixing piece (12), the fixing piece (12) is arranged inside the sample bottle (7), and the fixing piece (12) is fixedly arranged with the sealing piece I (10) and the sealing piece II (11).
4. A particulate matter detecting device according to claim 3, wherein a first spring (13) is arranged between the fixing piece (12) and the bottle mouth (8), a second spring (14) is arranged between the fixing piece (12) and the bottle bottom (9), the first spring (13) pulls the fixing piece (12) towards the bottle mouth (8), and the second spring (14) pushes the fixing piece (12) towards the bottle mouth (8).
5. The particulate matter detection device of claim 4, wherein the detection mechanism comprises:
a filter belt (15);
a winding wheel (16), wherein the winding wheel (16) is arranged on the shell (1), and the filter belt (15) is arranged on the winding wheel (16);
the output end of the second motor (17) is fixedly arranged with the winding wheel (16);
a radiation source (18), the radiation source (18) being arranged on the housing (1);
-a detector (19), the detector (19) being arranged on the housing (1), the detector (19) being arranged above the radiation source (18), the filter belt (15) being arranged between the radiation source (18) and the detector (19);
the sampling nozzle (20), sampling nozzle (20) set up shunt tubes (2) bottom, sampling nozzle (20) with shunt tubes (2) slip setting.
6. The particulate matter detection device of claim 5, wherein the filtering mechanism comprises:
-a particle cutter (21), the particle cutter (21) being adapted to filter larger diameter particles;
the heater (22), the heater (22) sets up granule cutterbar (21) lower part, keep away from on the heater (22) granule cutterbar (21) one end with shunt groove (2) fixed setting.
7. The particulate matter detecting device according to claim 6, wherein the first sealing sheet (10) is attached to one side of the bottle mouth (8) inside the sample bottle (7), the second sealing sheet (11) is attached to one side of the bottle bottom (9) outside the sample bottle (7), the first sealing sheet (10) is provided with a support arm extending out of the bottle mouth (8) in a direction away from the bottle bottom (9), and the second sealing sheet (11) is provided with a support arm extending out of the bottle bottom (9) in a direction away from the bottle mouth (8).
8. The particulate matter detection device of claim 7, wherein the butt joint opening (23) is matched with the bottle mouth (8) in shape, the butt joint opening (23) is detachably arranged with the placing groove (6), and a supporting rod matched with the supporting arm of the sealing sheet one (10) is arranged in the butt joint opening (23).
9. A particulate matter detection device according to claim 8, wherein the housing (1) is provided with:
the air pump (24) is arranged at the lower part of the placing groove (6), and an air outlet hole (25) on the air pump (24) is communicated with the shell (1);
the first cover door (26) is arranged on one side, close to the detector (19), of the shell (1), and the first cover door (26) and the shell (1) are rotatably arranged;
and the second cover door (27) is arranged on one side, close to the placing groove (6), of the shell (1), and the second cover door (27) and the shell (1) are rotatably arranged.
10. A particulate matter detection sampling method using a particulate matter detection device according to claim 9, characterized by comprising the steps of:
s1, preparing for detection, placing a plurality of sample bottles (7) in a vertical state, enabling the bottle mouths of the sample bottles (7) to face the same direction, enabling the bottle mouths (8) of the sample bottles (7) to extend into bottle bottoms (9) of the sample bottles (7) adjacent to the bottle mouths, installing the connected sample bottles (7) in a placing groove (6), abutting the bottle bottoms (9) of the sample bottles (7) with one end, close to a shunt groove (2), of the placing groove (6), abutting an abutting joint with the bottle mouths (8) of the sample bottles (7), enabling a supporting rod in the abutting joint to press supporting arms on a sealing piece I (10) in the bottle mouths (8) connected with the abutting joint, enabling the sealing piece I (10) to push a sealing piece II (11) and a fixing piece (12) to move in the sample bottles, enabling the fixing piece (12) to stretch a spring I (13), compressing a spring II (14), abutting supporting arms on the sealing piece II (11) in the bottle bottoms (9) against one end (8), and enabling each sealing piece I (7) in the bottle mouths (11) to be pressed with a sealing piece II (27) to be separated from a sealing piece II (8), and a sealing piece II (7) in the bottle mouths to be closed;
s2, gas detection, wherein a gas pump (24) is started to suck gas, the gas is discharged from a shell (1) through a gas outlet hole (25), the gas enters the shell (1) through a filtering mechanism, larger particles are filtered out by the gas through a particle cutter (21), the gas heats the air through a heater (22) to reduce the moisture in the air, the air enters a sampling nozzle (20) through a shunt groove (2) to be sprayed on a filter belt (15), the particles in the air are attached to the filter belt (15), a rolling wheel (16) drives the filter belt (15) to move, and the filter belt (15) detects the particles on the filter belt (15) when passing between a radiation source (18) and a detector (19);
s3, sample collection, when the content of particles in gas is detected to have great change, motor one (4) starts to drive check separation blade (3) to rotate, check separation blade (3) is led to the pipeline of sampling nozzle (20) with splitter box (2), splitter box (2) are linked together with air duct (5), gas passes through splitter box (2) and gets into sample bottle through air duct (5), gas gets into casing (1) in proper order through all sample bottles (7) in the through-hole that standing groove (6) is close to splitter box (2) one end, gas in casing (1) gets into in air pump (24) and discharges casing (1) through the gas outlet of air pump (24), after the sampling is accomplished, will butt joint and standing groove (6) separation after opening lid door two (27), the support arm on butt joint and sealing plate one (10), sealing plate one (10) and sealing plate two (11) move under the effect of spring two (14), sealing plate one (10) and bottle mouth (8) inboard contact, sealing plate two (11) and the sample bottle (7) are contacted by the sample bottle outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311097394.2A CN116878977A (en) | 2023-08-29 | 2023-08-29 | Particulate matter detection device and sampling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311097394.2A CN116878977A (en) | 2023-08-29 | 2023-08-29 | Particulate matter detection device and sampling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116878977A true CN116878977A (en) | 2023-10-13 |
Family
ID=88266577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311097394.2A Withdrawn CN116878977A (en) | 2023-08-29 | 2023-08-29 | Particulate matter detection device and sampling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116878977A (en) |
-
2023
- 2023-08-29 CN CN202311097394.2A patent/CN116878977A/en not_active Withdrawn
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Application publication date: 20231013 |