CN116148147A - Be used for portable high accuracy ambient air particulate matter sampling analysis appearance - Google Patents
Be used for portable high accuracy ambient air particulate matter sampling analysis appearance Download PDFInfo
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- CN116148147A CN116148147A CN202310059741.6A CN202310059741A CN116148147A CN 116148147 A CN116148147 A CN 116148147A CN 202310059741 A CN202310059741 A CN 202310059741A CN 116148147 A CN116148147 A CN 116148147A
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- 238000005070 sampling Methods 0.000 title claims abstract description 149
- 239000013618 particulate matter Substances 0.000 title claims abstract description 33
- 239000012080 ambient air Substances 0.000 title claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 62
- 239000000758 substrate Substances 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 230000005250 beta ray Effects 0.000 claims description 27
- 238000005096 rolling process Methods 0.000 claims description 24
- 239000003570 air Substances 0.000 claims description 21
- 230000003287 optical effect Effects 0.000 claims description 20
- 230000009471 action Effects 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 8
- 230000002285 radioactive effect Effects 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 6
- 230000003584 silencer Effects 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 230000033001 locomotion Effects 0.000 description 13
- 230000005855 radiation Effects 0.000 description 8
- 239000002245 particle Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003028 elevating effect Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
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- 238000005520 cutting process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000013441 quality evaluation Methods 0.000 description 1
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- 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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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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
- G01N1/24—Suction devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The invention relates to the technical field of particulate matter detectors, and particularly discloses a portable high-precision ambient air particulate matter sampling analyzer which comprises a host, a sampling analysis mechanism, a paper feeding mechanism moving driving device, a sampling nozzle lifting device and an automatic calibration device, wherein a substrate is arranged in the host, the sampling analysis mechanism is arranged on the substrate, the paper feeding mechanism is arranged below the sampling analysis mechanism, the paper feeding mechanism is connected with the paper feeding mechanism moving driving device, and the sampling nozzle lifting device and the automatic calibration device are fixed on the opposite side of the substrate where the sampling analysis mechanism is arranged. The outside of host computer still is connected with particulate matter cutterbar, sampling pipe, dynamic heating pipe, temperature and humidity sensor, tripod, external sampling pump, GPS and GPRS antenna. The device has reasonable overall structure layout, an automatic calibration device, an external sampling pump and a dynamic heating pipe, a small host, light weight and high analysis precision.
Description
Technical Field
The invention belongs to the technical field of particulate matter sampling analyzers, and particularly relates to a portable high-precision ambient air particulate matter sampling analyzer.
Background
In the field of environmental monitoring and control, suspended particulate matter is a general important pollution index in environmental air quality evaluation. In the method for monitoring the particulate matters in the ambient air, the beta-ray method has stable performance and relatively mature technology, and can automatically sample and analyze for a long time.
Compared with an online beta-ray analyzer which needs to operate in a constant temperature and humidity room, the portable beta-ray analyzer is convenient to carry, does not need to construct a constant temperature and humidity environment, is convenient to arrange, has low cost, and is more suitable for outdoor point distribution monitoring. Meanwhile, compared with an online instrument, the portable beta-ray analyzer faces more severe environmental conditions, and how to ensure the precision and the stability of the portable beta-ray analyzer in a changeable outdoor environment is an important research subject.
The existing part of portable beta-ray analyzer does not have an automatic calibration mechanism, adopts a layout method (an in-situ method) for sampling and analyzing the same station, and a paper tape moves between two stations for multiple times in a mode of curling in two directions, so that tension control of the paper tape does not exist, a vertical direction positioning function of the paper tape does not exist in an analysis station, a sampling pump is built in a host shell, a temperature compensation function cannot be realized by using a standard diaphragm, analysis precision in a complex temperature environment is affected, sampling is easily affected by outdoor variable environments, positioning errors of the paper tape are large, tension is not constant, analysis precision is affected, and the whole volume and weight of a host are large.
Disclosure of Invention
The invention aims to provide a portable high-precision environment air particulate matter sampling analyzer, which mainly solves the problems of errors and large volume of sampling and analyzing precision of the conventional particulate matter sampling analyzer.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a be used for portable high accuracy ambient air particulate matter sampling analysis appearance, includes the host computer, set up the base plate in the host computer, still include sampling analysis mechanism, paper feed mechanism remove drive arrangement, sampling nozzle elevating gear, automatic calibration device, install sampling analysis mechanism on the base plate, sampling analysis mechanism below sets up paper feed mechanism, paper feed mechanism removes drive arrangement with the paper feed mechanism and is connected, sampling nozzle elevating gear, automatic calibration device fix the offside in sampling analysis mechanism place base plate one side.
Preferably, the sampling analysis mechanism comprises a sampling nozzle, a radiation source, a beta ray detector, an analysis module fixing block, a downstream rectifying tube and a detector guide roller, wherein the radiation source and the beta ray detector are fixed on a substrate through the analysis module fixing block, the sampling nozzle is fixed in the middle of the analysis module fixing block, the downstream rectifying tube is fixed at the lower part of the analysis module fixing plate and is positioned under the sampling nozzle, the detector guide roller is fixed at two sides of the radiation source, and the beta ray detector is fixed right above the radiation source.
Preferably, the paper feeding mechanism comprises a mounting plate, a counting wheel assembly, two paper guide wheel assemblies, a tensioning wheel assembly, a paper placing wheel assembly, a paper collecting wheel assembly, a paper filtering belt and a paper filtering belt compacting plate, wherein the counting wheel assembly and one paper guide wheel assembly are fixed at the same height of the mounting plate, the tensioning wheel assembly is fixed on the mounting plate below the counting wheel assembly, the paper feeding wheel assembly and the other paper guide wheel assembly are positioned at the same height of the mounting plate, the paper placing wheel assembly and the paper collecting wheel assembly are fixed on the mounting plate below the tensioning wheel assembly and the paper guiding wheel assembly, and are positioned at the same height of the mounting plate, the paper filtering belt compacting plate is fixed on the paper placing wheel assembly and the paper collecting wheel assembly, and the paper filtering belt is wound on the counting wheel assembly, the paper guiding wheel assembly, the tensioning wheel assembly, the paper placing wheel assembly and the paper collecting wheel assembly.
Preferably, the counting wheel assembly further comprises a first groove-shaped optical coupler and a second groove-shaped optical coupler, wherein the first groove-shaped optical coupler and the second groove-shaped optical coupler are respectively fixed on the substrate above the counting wheel assembly.
Preferably, the tensioning wheel assembly comprises a wheel shaft, a tensioning wheel, a linear guide rail, a movable plate, a tensioning spring, a third groove-type optocoupler and a fourth groove-type optocoupler, wherein the linear guide rail is fixed on the mounting plate, the movable plate moves left and right on the linear guide rail, the wheel shaft is connected with the movable plate, the tensioning wheel is connected with the wheel shaft, one end of the tensioning spring is connected with the movable plate, the other end of the tensioning spring is fixedly connected with the mounting plate, and the third groove-type optocoupler and the fourth groove-type optocoupler are fixed on the mounting plate below the movable plate.
Preferably, the sampling nozzle lifting device comprises a driving motor, a first eccentric shaft, a spring positioning sleeve, a first rolling bearing and a self-lubricating shaft sleeve, wherein the spring positioning sleeve is sleeved outside the sampling nozzle, the driving motor is connected with the first eccentric shaft, the working end of the first eccentric shaft is connected with the first rolling bearing, the lower edge of the spring positioning sleeve is tightly pressed against the outer ring of the first rolling bearing, and the sampling nozzle is connected with the analysis module fixing block through the self-lubricating shaft sleeve; the sampling nozzle lifting device further comprises a first code disc, a shell and a fifth groove-shaped optocoupler, the first code disc is sleeved on the first eccentric shaft, the shell covers part of the first eccentric shaft and the outside of the first code disc, the driving motor is fixed on one side of the shell, and the fifth groove-shaped optocoupler is fixed on the shell and is opposite to the first code disc.
Preferably, the automatic calibration device comprises a standard diaphragm assembly, a poking plate central shaft, a torsion spring, a driving device, a second eccentric shaft and a second rolling bearing, wherein the driving device is connected with the second eccentric shaft, the working end of the second eccentric shaft is connected with the second rolling bearing, the working end of the poking plate central shaft is connected with the poking plate, the other end of the poking plate central shaft is connected with the torsion spring, and the poking plate is tightly pressed with the outer ring of the second rolling bearing under the action of the torsion force of the torsion spring; the automatic calibration device further comprises a calibration driving device fixing seat, a second code disc and a sixth groove-shaped optical coupler, wherein the driving device is fixedly connected with the calibration driving device fixing seat, the second code disc is sleeved on the second eccentric shaft, and the sixth groove-shaped optical coupler is fixed on the calibration driving device fixing seat.
Preferably, the standard diaphragm assembly comprises a diaphragm fixing plate, a standard diaphragm bin, a self-lubricating guide plate and a uniform loading plate, wherein the standard diaphragm is fixed on the diaphragm fixing plate, a long circular groove is formed in the standard diaphragm bin, a fixing pin is arranged on the diaphragm fixing plate, the diaphragm fixing plate moves in and out of the standard diaphragm bin in the long circular groove by pulling and pushing the fixing pin, and the self-lubricating guide plate and the uniform loading plate are sequentially arranged on the upper portion of the diaphragm fixing plate and are fastened in the standard diaphragm bin.
Preferably, the outside of host computer still is connected with particulate matter cutterbar, sampling pipe, dynamic heating pipe, temperature and humidity sensor, tripod, external sampling pump, GPS and GPRS antenna, the sampling pipe is connected to the particulate matter cutterbar, dynamic heating pipe is fixed in the sampling pipe outside, temperature and humidity sensor, GPS and GPRS antenna are fixed in the host computer outside, the tripod supports in the host computer below.
Preferably, the external sampling pump comprises a shell, a bracket, a handle, an air duct guide cover, a cooling fan, a temperature controller, a vacuum pump and an exhaust silencer, wherein the handle is fixed at the top of the shell, the lower part of the shell is fixed with the bracket, the air duct guide cover is fixed on the side surface of the shell, the cooling fan, the vacuum pump and the temperature controller are fixed inside the shell, and the exhaust silencer is connected with the vacuum pump.
The invention has the beneficial effects that:
the analyzer of the invention has reasonable overall structure layout,
1. an automatic calibration mechanism is arranged in the host, so that a temperature compensation function can be realized by using a standard diaphragm, and the analysis precision of the instrument in a complex environment is improved;
2. the sampling and analyzing mechanism is used for arranging sampling and analyzing at two stations, the filter paper belt is provided with a counting wheel assembly and a tensioning wheel assembly for realizing back and forth movement of the paper belt at the two stations, so that the accurate positioning of the paper belt is realized, the tension of the paper belt is not changed, the introduction of additional errors is avoided, and the analyzing precision is ensured;
3. under the condition that the length of the filter paper tape is unchanged, which is set by a program, as the moving track and the length of the tension wheel assembly are constant, the tension force borne by the filter paper tape can be ensured to be constant, the tension value of the filter paper tape is ensured to be basically unchanged between each sampling analysis period, positioning precision errors caused by different tension values of the filter paper tape are avoided, and the thickness change of the filter paper tape caused by different tensions affects the analysis precision;
4. the detector paper guide rollers are fixed on two sides of the radioactive source, the height of the detector paper guide rollers in the vertical direction is slightly higher than that of the counting wheel and the paper guide wheels in the vertical direction, a certain height difference exists, so that the filter paper tape is tightly attached to the common tangent line of the top surfaces of the two detector paper guide rollers under the action of tension, the filter paper tape can be ensured to be consistent all the time in the vertical direction of the space of the analysis station, the arched section formed by the filter paper tape under the action of tension can be eliminated, the accuracy and the stability of metering analysis at the position are improved, and the displacement and deformation of the filter paper tape in the vertical direction between the radioactive source and the beta-ray detector are avoided, and the analysis precision is influenced;
5. the analysis module fixing block carries the fixed installation of the sampling and analysis module such as the sampling nozzle, the rectifying tube, the radioactive source, the detector paper guide roller and the like, is integrally formed by virtue of the ultra-high machining precision of the machine tool, ensures the relative position precision of each part installed on the analysis module fixing block, and avoids the distance error between the sampling and analysis stations and the distance error between the radioactive source and the detector which are easy to generate during installation or after long-time use, thereby influencing the analysis precision;
6. the rectifying tube is arranged at the downstream of the sampling station, so that the uniform distribution of particles on the filter paper belt can be ensured, the problem that the air inlet direction and the air outlet direction of the downstream cavity are inconsistent, and the uneven distribution of the particles is introduced due to 'air short circuit' is avoided, and the analysis precision of the instrument is improved;
7. the gas path system from the sampling pipe to the filter paper belt is in an optimized design, and has smooth transition and no protruding structure, so that the particle interception phenomenon is avoided, and the accuracy of a sampling sample is ensured;
8. the sampling pump is arranged externally, the volume and the weight of the host are reduced, and meanwhile, the vibration and the heating of the sampling pump can not influence the precision of the instrument;
9. the GPS positioning and GPRS data transmission functions are realized, the GPS positioning and GPRS data transmission system is suitable for outdoor use, and the maintenance cost is reduced;
10. the dynamic heating pipe is arranged outside the main machine shell and has a waterproof design, so that the influence of heating on the main machine is avoided; meanwhile, the vertical position is convenient to adjust, and the best position is convenient to adjust.
Drawings
FIG. 1 is a schematic view of an installation structure of an A-side of a substrate in a host according to the present invention;
FIG. 2 is a schematic view of a B-side mounting structure of an internal substrate of a host according to the present invention;
FIG. 3 is a schematic diagram of the overall structure of the particulate matter sampling analyzer of the present invention;
FIG. 4 is a schematic view of a paper feed mechanism according to the present invention;
FIG. 5 is a schematic view of another embodiment of the paper feed mechanism of the present invention;
FIG. 6 is a schematic view of a moving drive device of the paper feeding mechanism of the present invention;
FIG. 7 is a schematic diagram of a sample analysis mechanism according to the present invention;
FIG. 8 is a schematic view of a lifting device of a sampling nozzle according to the present invention;
FIG. 9 is a schematic diagram of an automatic calibration device according to the present invention;
FIG. 10 is a schematic view of another configuration of the automatic calibration device of the present invention;
FIG. 11 is a schematic view of another configuration of the automatic calibration device of the present invention;
FIG. 12 is a schematic view of a modular diaphragm assembly of the present invention;
FIG. 13 is a schematic view of the internal structure of the external sampling pump of the present invention;
FIG. 14 is a schematic view of the external structure of the external sampling pump of the present invention;
fig. 15 is a schematic folding view of a stand of an external sampling pump according to the present invention.
The drawing is marked:
the device comprises a host machine 1, a sampling analysis mechanism 2, a paper feeding mechanism 3, a paper feeding mechanism moving driving device 4, a sampling nozzle lifting device 5, an automatic calibration device 6, a first groove-type optical coupler 7, a second groove-type optical coupler 8, a particulate matter cutter 9, a sampling tube 10, a dynamic heating tube 11, a temperature and humidity sensor 12, a tripod 13, an external sampling pump 14, a GPS and GPRS antenna 15, a substrate 16, a counting wheel 17, a paper guide wheel 18 and a guide rail 160;
a sampling nozzle 201, a radiation source 202, a beta-ray detector 203, an analysis module fixing block 204, a downstream rectifying tube 205 and a detector guide roller 206;
the device comprises a mounting plate 300, a positioning surface 3001, a counting wheel assembly 301, a tensioning wheel assembly 302, a linear guide rail 303, a third groove type optocoupler 304, a fourth groove type optocoupler 305, a tensioning spring 306, a paper placing wheel assembly 307, a paper collecting wheel assembly 308, a filter paper belt 309, a filter paper belt compacting plate 310, a paper guiding wheel assembly 311, a movable plate 3021, a second wheel shaft 3022 and a tensioning wheel 3023;
a gear motor 401, a coupler 402, a ball screw nut assembly 403, an encoder 404, a fixed side plate 405 and an L-shaped fixed seat 406;
the device comprises a driving motor 501, a first eccentric shaft 502, a spring positioning sleeve 503, a first rolling bearing 504, a spring 505, a first code wheel 506, a casing 507, a fifth groove-type optocoupler 508, a self-lubricating shaft sleeve 509, a nozzle sealing sleeve 510 and a sealing ring 511;
casing 141, bracket 142, handle 143, duct cover 144, radiator fan 145, thermostat 146, vacuum pump 147, exhaust muffler 148, intake port 149, exhaust port 140, lock 1410, and elongated hole 1420.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
As shown in fig. 1-3, the present embodiment provides the following technical solutions:
the utility model provides a be used for portable high accuracy ambient air particulate matter sampling analysis appearance, includes host computer 1, the inside in the host computer 1 is provided with sampling analysis mechanism 2, paper feed mechanism 3, paper feed mechanism and removes drive arrangement 4, sampling nozzle elevating gear 5, automatic calibration device 6, first trough type opto-coupler 7, second trough type opto-coupler 8, sampling analysis mechanism 2 includes sampling nozzle 201, radiation source 202, beta ray detector 203 for accomplish the sampling and the analysis work of particulate matter. The feed mechanism 3 is used to release a new strip of paper of a set length and to recover the old strip of paper while keeping the tension of the strip 309 constant. The paper feed mechanism moving driving device 4 is used for driving the paper feed mechanism 3 to move left and right, so that the paper filtering belt 309 is switched between the sampling and analyzing stations of the sampling and analyzing mechanism 2. The sampling nozzle lifting device 5 is used for driving the sampling nozzle 21 to lift or descend. The automatic calibration device 6 is used for driving the calibration membrane to extend or retract into the standard membrane bin, and automatic calibration work is completed. The first slot-type optocoupler 7 is used for determining the initial position of the movement of the paper feeding mechanism 3. The second groove-shaped optocoupler 8 is used for determining the limiting position of the movement of the paper feeding mechanism 3 and preventing structural damage caused by overrun of the movement of the paper feeding mechanism 3.
Referring to fig. 2, the outside of the host computer 1 is further connected with a particulate matter cutter 9, a sampling tube 10, a dynamic heating tube 11, a temperature and humidity sensor 12, a tripod 13, an external sampling pump 14, a GPS and a GPRS antenna 15. The particulate matter cutter 9 is designed and processed according to the national standard for screening particulate matter within a certain particle size range, allowing it to enter the sampling tube 10. The dynamic heating pipe 11 is controlled by a program to regulate the temperature of air flowing through the sampling pipe 10 in real time. The sampling tube 10 connects the particulate cutter 9 to the host 1 and introduces particulate-laden air into the sampling station of the host 1. The temperature and humidity sensor 12 is provided with a rainproof device, and monitors the temperature and humidity of the current air in real time. The tripod 13 is made of aluminum alloy, so that the weight of the whole machine can be reduced, and the tripod is used for supporting the host machine 1. The GPS and GPRS antenna 15 is used for analyzer positioning and remote data transmission. The external sampling pump 14 has a rain-proof, water-logging-proof design for providing suction power to allow air to enter the main machine 1 from the particulate matter cutter 9 and be expelled.
As shown in fig. 4 and 5, a substrate 16 is disposed inside the host 1, and the paper feeding mechanism 3 includes a mounting plate 300, a counting wheel assembly 301, a tension wheel assembly 302, a third slot-type optocoupler 304, a fourth slot-type optocoupler 305, a paper feeding wheel assembly 307, a paper collecting wheel assembly 308, a filter paper band 309, a filter paper band pressing plate 310, and a paper guiding wheel assembly 311. The counting wheel assembly 301 and one paper guide wheel assembly 311 are fixed at the same height of the mounting plate 300, the tension wheel assembly 302 is fixed on the mounting plate 300 below the counting wheel assembly 301 and is positioned at the same height of the mounting plate 300 with the other paper guide wheel assembly 311, the paper placing wheel assembly 307 and the paper collecting wheel assembly 308 are fixed on the mounting plate 300 below the tension wheel assembly 302 and the paper guide wheel assembly 311 and are positioned at the same height of the mounting plate 300, and the filter paper belt 309 is wound on the counting wheel assembly 301, the paper guide wheel assembly 311, the tension wheel assembly 302, the paper placing wheel assembly 307 and the paper collecting wheel assembly 308.
The mounting plate 300 is arranged on one side of the base plate 16, the counting wheel assembly 301 is composed of a counting wheel 17, a first wheel shaft and an encoder, the encoder and the first wheel shaft are fixed on the A face of the mounting plate 300, and the first wheel shaft penetrates through the mounting plate 300 to be connected with one counting wheel 17 on the B face of the mounting plate 300, and the counting wheel assembly 301 is used for measuring and controlling the curled length of the paper filtering belt 309. The tensioning wheel assembly 302 is composed of a linear guide rail 303, a movable plate 3021 fixed on the linear guide rail 303, a second wheel shaft 3022, a tensioning wheel 3023 and a tensioning spring 306, wherein the movable plate 3021 can move left and right on the linear guide rail 303, one end of the tensioning spring 306 is connected with the movable plate 3021, and the other end of the tensioning spring 306 is directly fixedly connected with the surface A of the mounting plate 300. The second axle 3022 has one end connected to the movable plate 3021, and the other end passing through the mounting plate 300 and connected to a tensioning wheel 3023 located on the B-side of the mounting plate 300, and the tensioning wheel assembly 302 is used for controlling tension of the paper filtering belt 309. The linear guide 303 provides guidance for the movement of the tensioner assembly 302. The third slot type optocoupler 304 and the fourth slot type optocoupler 305 are both fixed on the mounting plate 300 below the tensioning wheel assembly 302. The third slot optocoupler 304 is used to determine the limit position of the tensioner assembly 302 and prevent excessive curl breakage of the filter belt 309. The fourth slot optical coupler 305 is configured to determine an initial position of the tension pulley assembly 302, and control the paper feeding wheel assembly 307 to stop feeding paper. The tension spring 306 provides tension to the tensioner assembly 302. The specific structures of the paper placing wheel assembly 307 and the paper collecting wheel assembly 308 adopt the structures of the prior art, namely, the structures of a motor, a speed reducer and a shaft and a paper winding wheel. The delivery wheel assembly 301 is used to release a new strip of filter paper 309. The delivery wheel assembly 308 is used to curl the used old filter paper strip 309. In fig. 4, a filter paper band pressing plate 310 is fixed to a reel (including a delivery wheel and a delivery wheel) for pressing the coiled filter paper band 309 so as to rotate in synchronization with the delivery wheel and the delivery wheel. The counting wheel 17, the first wheel axle, the second wheel axle 3022, the tensioning wheel 3023, the paper placing wheel, the paper collecting wheel and the shafts thereof, the paper guiding wheel and the shafts thereof all penetrate through the base plate 16 and are positioned on one side of the base plate 16, and the base plate 16 is correspondingly provided with strip holes so as to facilitate the left-right movement of the counting wheel assembly 301, the tensioning wheel assembly 302, the paper placing wheel assembly 307, the paper collecting wheel assembly 308 and the paper guiding wheel assembly 311 under the driving of the paper feeding mechanism moving driving device 4.
As shown in fig. 6, the paper feed mechanism moving drive device 4 includes a gear motor 401, a coupling 402, a ball screw nut assembly 403, an encoder 404, and a fixed side plate 405, wherein the gear motor 401 is connected to the coupling 402, the coupling 402 is connected to the ball screw of the ball screw nut assembly 403, the encoder 404 is fixed to an end of the ball screw nut assembly 403, and the fixed side plate 405 is fixed to the base plate 16. The ball screw nut assembly 403 is used to convert the rotational motion of the shaft of the gear motor 401 into linear motion of the nut of the ball screw nut assembly 403. The nut is provided with an L-shaped fixing seat 406, the L-shaped fixing seat 406 is fixedly connected with the mounting plate 300, the side surface of the base plate 16 is provided with a guide rail 160, the mounting plate 300 is fixedly provided with a sliding block, a positioning surface 3001 of the sliding block is shown in fig. 5, and when the nut moves linearly, the mounting plate 300 can be driven to move left and right, so that the whole displacement of the paper feeding mechanism 3 is realized. The encoder 404 is used to gauge the distance traveled by the nut and the components secured thereto.
The cross-sectional view of the sampling analysis mechanism 2 is shown in fig. 7, and further includes the analysis module fixing block 204, the downstream rectifying tube 205, and the detector guide roller 206, where the analysis module fixing block 204 is formed by integrally processing an aluminum alloy material, and the relative position accuracy of each component mounted on the analysis module fixing block is guaranteed by means of ultra-high processing accuracy of a machine tool, the analysis module fixing block 204 is fixed on the substrate 16, the radiation source 202 is mounted on the analysis module fixing block 204, the β -ray detector 203 is also fixed on the substrate 16 through the analysis module fixing block 204, the sampling nozzle 201 is fixed in the middle of the analysis module fixing block 204, and the sampling nozzle 21 can be lifted and separated from the filter paper 309 under the action of the sampling nozzle lifting device 5, and can also be lowered to compact the filter paper 309, so as to construct a highly-sealed airflow path, and ensure that particles are cut on the filter paper 309 to have the same shape as the cross-section of the nozzle inner hole. The downstream rectifying tube 205 is arranged right below the sampling nozzle 201, the downstream rectifying tube 205 is fixed at the lower part of the analysis module fixing block 204, and the particle is uniformly distributed on the filter paper 309 according to the aerodynamic principle design. The detector paper guide rollers 206 are fixed on two sides of the radiation source 22, and the top surface of the detector paper guide rollers is slightly higher than the top surfaces of the counting wheel 17 and the paper guide wheels 18, so that the filter paper belts 309 are tightly attached to the top surface public cutting lines of the two detector paper guide rollers 26 under the action of tension, the filter paper belts 309 can be ensured to be consistent all the time in the vertical direction of the space of the analysis station, the arched section formed by the filter paper belts 309 under the action of tension can be eliminated, and the accuracy and the stability of the metering analysis at the position are improved. The guide wheel 18 guides the movement of the filter paper band 309. The counter wheel 17, on the basis of guiding the filter belt 309, cooperates with an encoder to measure and control the curl length of the filter belt 309.
Referring to fig. 8, the sampling nozzle lifting device 5 includes a driving motor 501, a first eccentric shaft 502, a spring positioning sleeve 503, and a first rolling bearing 504, where the sampling nozzle 201 is externally sleeved with the spring positioning sleeve 503, a spring 505 inside the spring positioning sleeve 503 is a cylindrical helical compression spring, the spring 505 is sleeved outside the sampling nozzle 201, the body of the spring positioning sleeve 503 is divided into an upper part and a lower part, the spring 505 is clamped between the upper part and the lower part of the body of the spring positioning sleeve 503, the lower part of the body is fixedly connected with the sampling nozzle 201 through screws, the upper part of the body is fixed, when the spring 505 is compressed, the lower part of the body of the spring positioning sleeve 503 can drive the sampling nozzle 201 to move upwards, and when the spring 505 is reset, the lower part of the body of the spring positioning sleeve 503 can be pushed to drive the sampling nozzle 201 to move downwards. The power end of the first eccentric shaft 502 is connected with the driving motor 501, the working end of the first eccentric shaft 502 is connected with the first rolling bearing 504, the lower part of the spring positioning sleeve 503 body is provided with a protruding edge, the lower edge of the edge is tightly pressed against the outer ring of the first rolling bearing 504 under the action of the elastic force of the spring 505, and when the driving motor 1 drives the working end of the first eccentric shaft 502 to move upwards in the vertical direction, the first rolling bearing 504 compresses the spring 505 in the spring positioning sleeve 503 and drives the sampling nozzle 201 to move upwards; when the driving motor 501 drives the motion component of the working end of the first eccentric shaft 502 in the vertical direction to move downwards, the spring 505 in the spring positioning sleeve 503 resets and presses the first rolling bearing 504 to drive the sampling nozzle 201 to move downwards.
The sampling nozzle lifting device 5 further comprises a first code disc 506 and a machine shell 507, the first code disc 506 is sleeved on the first eccentric shaft 502, the machine shell 507 covers part of the first eccentric shaft 502 and the outer part of the first code disc 506, and the driving motor 501 is fixed on one side of the machine shell 507. The motor shaft of the driving motor 501 passes through the casing 507 and enters the inside of the casing 507, and is connected with the first eccentric shaft 502 through a coupling 512.
The sampling nozzle lifting device 5 further comprises a fifth groove-shaped optical coupler 508, the fifth groove-shaped optical coupler 508 is fixed on the casing 507, the position of the fifth groove-shaped optical coupler is opposite to the first code wheel 506, and the fifth groove-shaped optical coupler 508 can detect the pulse signal of the first code wheel 506, so that the current position of the sampling nozzle 201 is determined and fed back to the control system.
The power end of the first eccentric shaft 502 passes through the base plate 16 and is connected with the base plate 16 through a bearing seat 513 and a bearing 514.
The analysis module fixing block 204 is fixedly installed on the substrate 16, the analysis module fixing block 204 is also divided into an upper part and a lower part, the assembly position of the spring positioning sleeve 503 is located between the upper part and the lower part of the analysis module fixing block 204, the analysis module fixing block 204 at the lower part is provided with a part for placing the filter paper tape 309, and the sampling nozzle 201 is sequentially inserted into the analysis module fixing block 204 at the upper part and the analysis module fixing block 204 at the lower part and is connected with the analysis module fixing block 204 through the self-lubricating shaft sleeve 509. The downward movement of the sampling nozzle 201 can press the filter paper band 309 for sampling purposes, and the upward movement of the sampling nozzle 201 is separated from the analysis module fixing block 204, so that the filter paper band 309 can be removed for detection.
The upper end of the sampling nozzle 201 is sleeved with a nozzle sealing sleeve 510. A sealing ring 511 is arranged between the sampling nozzle 201 and the nozzle sealing sleeve 510. As a preferred embodiment of the present example, the first rolling bearing 504 of the present example employs a deep groove ball bearing.
Referring to fig. 9-11, the automatic calibration device 6 includes a standard diaphragm assembly 601, a dial 602, a dial central shaft 603, a torsion spring 604, a driving device 605, a second eccentric shaft 606 and a second rolling bearing 607, wherein the driving device 605 is connected with the second eccentric shaft 606, the driving device 605 of the embodiment adopts a gear motor, a gear motor shaft is directly and fixedly connected with the second eccentric shaft 606, a working end of the second eccentric shaft 606 is connected with the second rolling bearing 607, and the second rolling bearing 607 of the embodiment adopts a deep groove ball bearing. The working end of the shifting plate central shaft 603 is connected with a shifting plate 602, the other end of the shifting plate central shaft 603 is connected with a torsion spring 604, the torsion spring 604 is fixed at the end part of the shifting plate central shaft 603 through two nuts, the shifting plate 603 is tightly pressed with the outer ring of a second rolling bearing 607 under the action of the torsion force of the torsion spring 604, and the second eccentric shaft 606 is driven by a driving device 605, when the working end of the second eccentric shaft moves forward towards coordinates under the motion component of the Y axis, the tail end of the shifting plate 602 is pushed to retract a standard diaphragm 6011 in the standard diaphragm assembly 601; when the working end of the second eccentric shaft 606 moves in the negative direction of the coordinate under the driving of the driving device 605, the tail end of the poking plate 602 pulls the standard diaphragm 6011 to return to the standard diaphragm assembly 601 under the action of the torsion force of the torsion spring 604.
The automatic calibration device 6 further comprises a calibration driving device fixing seat 608, a second code wheel 609 and a sixth slot type optocoupler 610, and the driving device 605 is fixedly connected with the calibration driving device fixing seat 608. And a second code wheel 609 is sleeved on the second eccentric shaft 606. The sixth slot type optocoupler 610 is fixed on the calibration driving device fixing base 608 to detect the pulse signal of the second code wheel 609.
The automatic calibration device 6 further comprises a second bearing 611 and a second bearing 612, the dial central shaft 603 passes through the calibration driving device fixing seat 608, the dial central shaft 603 above the calibration driving device fixing seat 608 is connected with the torsion spring 604, the dial central shaft 603 below the calibration driving device fixing seat 608 is connected with the second bearing 612 and the second bearing 611, and the second bearing 612 is fixedly connected with the dial 602.
Referring to fig. 12, the standard diaphragm assembly 601 includes a diaphragm fixing plate 6012 and a standard diaphragm housing 6013, the standard diaphragm 6011 is fixed on the diaphragm fixing plate 6012, and the diaphragm fixing plate 6012 moves in and out of the standard diaphragm housing 6013 under the pulling and pushing of the pulling plate 602. The standard diaphragm cabin 6013 is provided with a long round groove 60130, the diaphragm fixing plate 6012 is provided with a fixing pin 60120, and the diaphragm fixing plate 6012 pulls and pushes the fixing pin 60120 to move in and out of the standard diaphragm cabin 6013 in the long round groove 60130 under the action of the pulling plate 602. The standard diaphragm assembly 601 further comprises a self-lubricating guide plate 6014 and a uniform loading plate 6015, and the self-lubricating guide plate 6014 and the uniform loading plate 6015 are sequentially arranged on the upper portion of the diaphragm fixing plate and are fastened in the standard diaphragm bin 6013.
Referring to fig. 13-15, the external sampling pump 14 includes a housing 141, a bracket 142, a handle 143, an air duct guide cover 144, a cooling fan 145, a temperature controller 146, a vacuum pump 147, and an exhaust silencer 148, wherein the housing 141 is of a split structure, has an upper housing and a lower housing, and is fixed by screws between the upper housing and the lower housing, so that the external sampling pump can be disassembled, and the internal components can be replaced conveniently. The handle 142 is fixed at the top of the shell 141, the support 143 is connected to the lower part, the support 142 adopts a foldable structure design, one end of the support 142 is hinged with the shell 141, the shell 141 is integrally supported during use, after the support is used up, the support is folded to the bottom of the shell 141, two locking clamps 1410 are designed at the bottom of the shell 141, two strip holes 1420 are designed on the support 142, when the support 142 is taken in and out, the locking clamps 1410 are clamped on the strip holes 1420 only by rotating the locking clamps 1410, and the convenience is realized. The two parallel side surfaces of the casing 141 are fixed with the air duct guide cover 144, the air duct guide cover 144 is of a structure which faces the support 142 and is designed to be open, the side surface of the casing 141 provided with the air duct guide cover 144 is provided with an air outlet, a cooling fan 145 and a temperature controller 146 are fixed inside the casing 141 adjacent to one of the air outlets, a vacuum pump 147 is fixed in the middle position inside the casing 141, the exhaust silencer 148 is connected with the vacuum pump 147, the casing 141 is also provided with an air inlet interface 149 and an exhaust interface 140, and the air inlet interface 149 and the exhaust interface 140 are respectively communicated with the vacuum pump 147.
Working principle: after the sampling analysis period starts, the sampling nozzle lifting device 5 drives the sampling nozzle 201 to lift and separate from the filter paper band 309. The first slot type optocoupler 7 detects whether the paper feed mechanism 3 is at the initial position, and if not, the paper feed mechanism moving driving device 4 drives the paper feed mechanism 3 to return to the initial position. The fourth slot type optocoupler 305 detects whether the tension wheel assembly 302 is at the initial position, if not, the paper placing wheel assembly 301 rotates to release a new filter paper band 309, the tension wheel assembly 302 moves towards the initial position under the action of the tension spring 306 along with the relaxation of the filter paper band 309 until the tension wheel assembly 307 returns to the initial position, the paper placing wheel assembly 307 stops releasing the filter paper band 309, at this time, the paper collecting wheel assembly 308 rotates to curl the filter paper band 309, the tension wheel assembly 302 moves towards the direction of the third slot type optocoupler 304 along with the tightening of the filter paper band 309, and tension force is applied to the filter paper band 309 under the action of the tension spring 306. During the crimping process of the filter belt 309, the counting wheel assembly 301 countsThe length of the curled filter paper band 309 is measured, and when the length reaches a programmed set point, the delivery wheel assembly 308 is controlled to stop. In the case that the curl length of the filter paper band 309 set by the program is not changed, since the moving track and length of the tension pulley assembly 302 are constant, it is possible to ensure that the tension applied to the filter paper band 309 is constant. At this time, the spot of the filter paper 309 at the analysis station is measured by the beta-ray detector 203 and the beta-ray intensity I of the filter paper 309 passing through the spot is recorded for a set time (T minutes) 0 . After the measurement is completed, the paper feed mechanism moving driving device 4 drives the paper feed mechanism 3 to move to the sampling position, and the moving distance is controlled by the encoder measurement. After the paper feeding mechanism 3 stops, the filter paper 309 at the analysis station moves to the sampling station corresponding to the sampling nozzle 201, and the sampling nozzle lifting device 5 drives the sampling nozzle 201 to descend, so as to compress the filter paper 309 and construct a high-tightness airflow path. The external sampling pump 14 is started and draws ambient air containing particulates through the particulate cutter 9 at a constant flow rate, the particulates being trapped on the filter belt 309 forming a "dust spot" of the same inside diameter as the sampling nozzle 201. After the external sampling pump 14 is started, the beta-ray detector 203 of the analysis station measures and records the beta-ray intensity value I of the blank filter belt 309 passing through the analysis station within a set time (T minutes) 1 . The automatic calibration device 6 then drives the standard diaphragm 6011 to extend, covering between the beta-ray detector 203 and the filter paper band 309, and the beta-ray detector 203 measures and records the beta-ray intensity value I of the beta-ray passing through the blank filter paper band 309 and the standard diaphragm 6011 within a set time (T minutes) 2 The automatic calibration device 6 drives the standard membrane 6011 to retract. The automatic calibration device 6 drives the standard diaphragm 6011 to extend again after the sampling is finished for T minutes, the standard diaphragm 6011 is covered between the beta-ray detector 203 and the filter paper belt 309, the beta-ray detector 203 of the analysis station measures again and records the beta-ray intensity value I passing through the blank filter paper belt 309 and the standard diaphragm 6011 within a set time (T minutes) 3 The automatic calibration device 6 drives the standard membrane 6011 to retract. After the sampling time is reached, the external sampling pump 14 stops running, the sampling nozzle lifting driving device 5 drives the sampling nozzle 201 to lift and separate from the filter paper band 309, the paper feed mechanism moving driving device 4 drives the paper feed mechanism 3 to return to the initial position,at this point the "dust spot" returns to the analysis station and the beta detector 203 measures and records the beta intensity I of the light passing through the spot filter strip 309 for a set period of time (T minutes) x . Will I 0 And I x Substituting the formula to calculate the average concentration of the particulate matters in the sampling analysis period. At the same time according to I 1 、I 2 And I x A concentration value deviation due to an external factor in the sampling analysis period can be calculated, and this value is referred to as a "compensation value". And combining and correcting the compensation value and the actually obtained average concentration value to obtain a more accurate actual concentration value.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a portable high accuracy ambient air particulate matter sampling analysis appearance, includes the host computer, set up base plate, its characterized in that in the host computer: the automatic calibration device is characterized by further comprising a sampling analysis mechanism, a paper feeding mechanism moving driving device, a sampling nozzle lifting device and an automatic calibration device, wherein the sampling analysis mechanism is arranged on the substrate, the paper feeding mechanism is arranged below the sampling analysis mechanism, the paper feeding mechanism is connected with the paper feeding mechanism moving driving device, and the sampling nozzle lifting device and the automatic calibration device are fixed on the opposite side of the substrate where the sampling analysis mechanism is located.
2. The portable high precision ambient air particulate matter sampling analyzer of claim 1, wherein: the sampling analysis mechanism comprises a sampling nozzle, a radioactive source, a beta ray detector, an analysis module fixing block, a downstream rectifying tube and a detector paper guide roller, wherein the radioactive source and the beta ray detector are fixed on a substrate through the analysis module fixing block, the sampling nozzle is fixed in the middle of the analysis module fixing block, the downstream rectifying tube is fixed at the lower part of the analysis module fixing plate and is positioned under the sampling nozzle, the detector paper guide roller is fixed at two sides of the radioactive source, and the beta ray detector is fixed right above the radioactive source.
3. The portable high precision ambient air particulate matter sampling analyzer of claim 1, wherein: the paper feeding mechanism comprises a mounting plate, a counting wheel assembly, two paper guide wheel assemblies, a tensioning wheel assembly, a paper delivery wheel assembly, a paper collecting wheel assembly, a paper filtering belt and a filter paper belt compacting plate, wherein the counting wheel assembly and one paper guide wheel assembly are fixed at the same height of the mounting plate, the tensioning wheel assembly is fixed on the mounting plate below the counting wheel assembly, the tensioning wheel assembly and the other paper guide wheel assembly are located at the same height of the mounting plate, the paper delivery wheel assembly and the paper delivery wheel assembly are fixed on the mounting plate below the tensioning wheel assembly and the paper guide wheel assembly, the filter paper belt compacting plate is fixed on the paper delivery wheel assembly and the paper collecting wheel assembly, and the filter paper belt is wound on the counting wheel assembly, the paper guide wheel assembly, the tensioning wheel assembly, the paper delivery wheel assembly and the paper collecting wheel assembly.
4. A portable high precision ambient air particulate matter sampling analyzer as claimed in claim 3, wherein: the counting wheel assembly further comprises a first groove-shaped optical coupler and a second groove-shaped optical coupler, wherein the first groove-shaped optical coupler and the second groove-shaped optical coupler are respectively fixed on the substrate above the counting wheel assembly.
5. A portable high precision ambient air particulate matter sampling analyzer as claimed in claim 3, wherein: the tensioning wheel assembly comprises a wheel shaft, a tensioning wheel, a linear guide rail, a movable plate, a tensioning spring, a third groove-type optocoupler and a fourth groove-type optocoupler, wherein the linear guide rail is fixed on a mounting plate, the movable plate moves left and right on the linear guide rail, the wheel shaft is connected with the movable plate, the tensioning wheel is connected with the wheel shaft, one end of the tensioning spring is connected with the movable plate, the other end of the tensioning spring is fixedly connected with the mounting plate, and the third groove-type optocoupler and the fourth groove-type optocoupler are fixed on the mounting plate below the movable plate.
6. The portable high precision ambient air particulate matter sampling analyzer of claim 1, wherein: the sampling nozzle lifting device comprises a driving motor, a first eccentric shaft, a spring positioning sleeve, a first rolling bearing and a self-lubricating shaft sleeve, wherein the spring positioning sleeve is sleeved outside the sampling nozzle, the driving motor is connected with the first eccentric shaft, the working end of the first eccentric shaft is connected with the first rolling bearing, the lower edge of the spring positioning sleeve is tightly pressed against the outer ring of the first rolling bearing, and the sampling nozzle is connected with the analysis module fixing block through the self-lubricating shaft sleeve; the sampling nozzle lifting device further comprises a first code disc, a shell and a fifth groove-shaped optocoupler, the first code disc is sleeved on the first eccentric shaft, the shell covers part of the first eccentric shaft and the outside of the first code disc, the driving motor is fixed on one side of the shell, and the fifth groove-shaped optocoupler is fixed on the shell and is opposite to the first code disc.
7. The portable high precision ambient air particulate matter sampling analyzer as claimed in claim 1, wherein: the automatic calibration device comprises a standard diaphragm assembly, a poking plate central shaft, a torsion spring, a driving device, a second eccentric shaft and a second rolling bearing, wherein the driving device is connected with the second eccentric shaft, the working end of the second eccentric shaft is connected with the second rolling bearing, the working end of the poking plate central shaft is connected with the poking plate, the other end of the poking plate central shaft is connected with the torsion spring, and the poking plate is tightly pressed with the outer ring of the second rolling bearing under the action of the torsion force of the torsion spring; the automatic calibration device further comprises a calibration driving device fixing seat, a second code disc and a sixth groove-shaped optical coupler, wherein the driving device is fixedly connected with the calibration driving device fixing seat, the second code disc is sleeved on the second eccentric shaft, and the sixth groove-shaped optical coupler is fixed on the calibration driving device fixing seat.
8. The portable high-precision ambient air particulate matter sampling analyzer of claim 7, wherein: the standard diaphragm assembly comprises a diaphragm fixing plate, a standard diaphragm bin, a self-lubricating guide plate and a uniform loading plate, wherein the standard diaphragm is fixed on the diaphragm fixing plate, a long round groove is formed in the standard diaphragm bin, a fixing pin is arranged on the diaphragm fixing plate, the diaphragm fixing plate moves in and out of the standard diaphragm bin under the condition that the fixing pin is pulled and pushed by the shifting plate in the long round groove, and the self-lubricating guide plate and the uniform loading plate are sequentially arranged on the upper portion of the diaphragm fixing plate and are fastened in the standard diaphragm bin.
9. The portable high-precision ambient air particulate matter sampling analyzer for use with any of claims 1-8, wherein: the outside of host computer still is connected with particulate matter cutterbar, sampling pipe, dynamic heating pipe, temperature and humidity sensor, tripod, external sampling pump, GPS and GPRS antenna, the sampling pipe is connected to the particulate matter cutterbar, dynamic heating pipe is fixed in the sampling pipe outside, temperature and humidity sensor, GPS and GPRS antenna are fixed in the host computer outside, the tripod supports in the host computer below.
10. The portable high-precision ambient air particulate matter sampling analyzer of claim 9, wherein: the external sampling pump comprises a shell, a support, a handle, an air duct guide cover, a cooling fan, a temperature controller, a vacuum pump and an exhaust silencer, wherein the handle is fixed at the top of the shell, the lower part of the shell is fixed with the support, the air duct guide cover is fixed on the side surface of the shell, the cooling fan, the vacuum pump and the temperature controller are fixed inside the shell, and the exhaust silencer is connected with the vacuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310059741.6A CN116148147A (en) | 2023-01-17 | 2023-01-17 | Be used for portable high accuracy ambient air particulate matter sampling analysis appearance |
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| CN202310059741.6A CN116148147A (en) | 2023-01-17 | 2023-01-17 | Be used for portable high accuracy ambient air particulate matter sampling analysis appearance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116445266A (en) * | 2023-06-14 | 2023-07-18 | 至美时代生物智能科技(北京)有限公司 | Automatic sampling and detecting device for air microorganisms |
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- 2023-01-17 CN CN202310059741.6A patent/CN116148147A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116445266A (en) * | 2023-06-14 | 2023-07-18 | 至美时代生物智能科技(北京)有限公司 | Automatic sampling and detecting device for air microorganisms |
| CN116445266B (en) * | 2023-06-14 | 2023-09-12 | 至美时代生物智能科技(北京)有限公司 | Automatic sampling and detecting device for air microorganisms |
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