CN113433240B - Automatic sampling and monitoring system for volatile organic compounds in atmosphere - Google Patents
Automatic sampling and monitoring system for volatile organic compounds in atmosphere Download PDFInfo
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- CN113433240B CN113433240B CN202110712059.3A CN202110712059A CN113433240B CN 113433240 B CN113433240 B CN 113433240B CN 202110712059 A CN202110712059 A CN 202110712059A CN 113433240 B CN113433240 B CN 113433240B
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- 238000005070 sampling Methods 0.000 title claims abstract description 153
- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 33
- 238000012544 monitoring process Methods 0.000 title claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims abstract description 64
- 238000001179 sorption measurement Methods 0.000 claims abstract description 39
- 238000001914 filtration Methods 0.000 claims abstract description 4
- 230000001788 irregular Effects 0.000 claims description 38
- 238000005086 pumping Methods 0.000 claims description 28
- 230000002457 bidirectional effect Effects 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 17
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 239000003463 adsorbent Substances 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims description 7
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims 5
- 239000007789 gas Substances 0.000 abstract description 47
- 230000007613 environmental effect Effects 0.000 abstract description 9
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 7
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 208000005623 Carcinogenesis Diseases 0.000 description 1
- 208000031320 Teratogenesis Diseases 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000036952 cancer formation Effects 0.000 description 1
- 231100000504 carcinogenesis Toxicity 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000009351 contact transmission Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000003756 stirring 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
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/043—Allowing translations
- F16M11/046—Allowing translations adapted to upward-downward translation movement
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/18—Heads with mechanism for moving the apparatus relatively to the stand
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/42—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters with arrangement for propelling the support stands on wheels
-
- 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
- G01N1/2214—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling by sorption
-
- 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
-
- 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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- Life Sciences & Earth Sciences (AREA)
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- Biochemistry (AREA)
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- Chemical & Material Sciences (AREA)
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- General Health & Medical Sciences (AREA)
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Abstract
The application relates to the technical field of environment detection, in particular to an automatic sampling and monitoring system for volatile organic compounds in the atmosphere, which comprises a driving device, a sampling device, an adsorption collecting device and a frame device; the driving device arranged on the frame device is in intermittent transmission connection with the sampling device so as to drive the sampling device to collect the gas of the environment to be monitored; the sampling device arranged on the frame device is connected and communicated with the adsorption collecting device in a matched manner so as to convey collected gas into the adsorption collecting device for adsorption filtration; the adsorption collecting device is detachably connected to the frame device and is matched and connected with the gas chromatography-mass spectrometer. The application adopts the driving device which can intermittently drive and control the sampling device and the lifting transmission device to work, and can drive the sampling device to sample the environmental gases with different levels through the cooperation of the sampling device and the lifting transmission device, thereby being convenient for detecting the environmental gases with multiple levels after being mixed.
Description
Technical Field
The application relates to the technical field of environment detection, in particular to an automatic sampling and monitoring system for volatile organic compounds in the atmosphere.
Background
The volatility contained in the atmosphere mostly has the harm of teratogenesis, carcinogenesis, mutation and the like, and is an important factor of the phenomena of atmospheric photochemical harm, greenhouse effect and the like, so that in order to timely monitor and control the pollution degree of the atmosphere, the real-time detection of the content of the atmospheric volatile organic matters is increasingly important, and particularly the online monitoring of the content of the volatile organic matters is increasingly important.
When the volatile organic compound collection monitoring device in the prior art is used for sampling, most of the volatile organic compound collection monitoring device can only collect the environmental gases with the same level, but cannot collect and mix the environmental gases with different levels, so that the detection result of the obtained environmental gas sample is accurate and general.
Disclosure of Invention
The application aims to provide an automatic sampling and monitoring system for volatile organic compounds in the atmosphere, which can effectively solve the problems in the prior art.
The aim of the application is achieved by the following technical scheme:
an automatic sampling and monitoring system for volatile organic compounds in the atmosphere comprises a driving device, a sampling device, an adsorption collecting device and a frame device;
the driving device arranged on the frame device is in intermittent transmission connection with the sampling device so as to drive the sampling device to collect the gas of the environment to be monitored;
the sampling device arranged on the frame device is connected and communicated with the adsorption collecting device in a matched manner so as to convey collected gas into the adsorption collecting device for adsorption filtration;
the adsorption collecting device is detachably connected to the frame device and is matched and connected with the gas chromatography-mass spectrometer so as to analyze and monitor the volatile organic compounds adsorbed and filtered through the gas chromatography-mass spectrometer.
Preferably, the driving device comprises a driving motor, an irregular friction driving wheel and a vertical frame; the driving motor is fixed on the frame device through the vertical frame, an irregular friction driving wheel is fixed on an output shaft of the driving motor, and the irregular friction driving wheel is connected with the sampling device in an intermittent friction transmission mode.
Preferably, the sampling device comprises a first transmission component, a pumping connecting rod, a pumping disc, a reset tension spring, a sampling cylinder, a detachable cylinder cover, a sampling pipe with an air inlet one-way valve and a sampling pipe with an air outlet one-way valve; one end of the sampling tube is a closed end, the other end of the sampling tube is an open end, the open end of the sampling tube is connected with a detachable tube cover in a matched manner, a sampling tube and a sampling tube are arranged on the detachable tube cover, and the sampling tube is connected with an adsorption collecting device; the inner end of the pumping connecting rod is fixedly connected with a pumping disc which is in sealing sliding fit in the sampling cylinder, the middle part of the pumping connecting rod is in sliding fit in the closed end of the sampling cylinder, the outer end of the pumping connecting rod is in matching connection with the first transmission component, so that the pumping disc is driven to slide in the sampling cylinder in a direction away from the detachable cylinder cover under the transmission of the first transmission component, and the gas of the environment to be monitored is pumped into the sampling cylinder through the sampling tube; and two ends of the reset tension spring are fixedly connected with the first transmission assembly and the sampling cylinder respectively.
Preferably, the first transmission assembly comprises a first friction wheel, a first linkage shaft, a first bearing shaft bracket, a gear, a rack and a linkage plate; the irregular friction driving wheel is connected with the first friction wheel in an intermittent friction driving way; the first friction wheel and the gear are fixed on a first linkage shaft, the first linkage shaft is in rotary fit with a first bearing shaft frame, and the first bearing shaft frame is fixed on the sampling cylinder; the gear is engaged with the transmission connecting rack, and the rack is in sliding fit in a guide slideway on the outer side surface of the sampling cylinder through a guide edge; one end of the rack is fixed with the linkage plate.
Preferably, the first friction wheel comprises a first wheel body, a first screw and a positioning block; the irregular friction driving wheel is connected with a first wheel body which is in sliding fit on the first linkage shaft in an intermittent friction driving manner, one end of the first screw rod is in rotary fit on the first wheel body, the other end of the first screw rod is in threaded fit on the positioning block, and the positioning block is fixed on the first wheel body.
Preferably, the automatic sampling and monitoring system for volatile organic compounds in the atmosphere further comprises a lifting transmission device; the sampling tube comprises a sampling nozzle, a sliding vertical tube, a fixed vertical tube and an air inlet transverse tube; the top of the sliding vertical pipe is fixedly provided with a sampling nozzle, the bottom of the sliding vertical pipe is in sealing sliding fit in the fixed vertical pipe, the bottom of the fixed vertical pipe is connected with one end of an air inlet transverse pipe, the other end of the air inlet transverse pipe is connected in an air inlet hole of the detachable cylinder cover, and an air inlet one-way valve is arranged on the air inlet transverse pipe; the top of the sliding vertical tube is connected with one end of a lifting transmission device in a matched mode, the lifting transmission device is fixed on the frame device, and the other end of the lifting transmission device is in intermittent friction transmission connection with the irregular friction transmission wheel so as to drive the sliding vertical tube to slide in the fixed vertical tube under the transmission of the irregular friction transmission wheel.
Preferably, the lifting transmission device comprises a second friction wheel, a worm, a second bearing bracket, a worm wheel, a short shaft, a driving belt wheel, a driven belt wheel, a bidirectional screw rod and a lifting bracket; the irregular friction driving wheel is in intermittent friction driving connection with a second friction wheel, the second friction wheel is fixed at one end of a worm, the middle part of the worm is in rotary fit on a second bearing shaft frame, the second bearing shaft frame is fixed on a vertical frame, the other end of the worm is in meshed driving connection with a worm wheel, the worm wheel and a driving pulley are both fixed on a short shaft, and the short shaft is in rotary fit on the second bearing shaft frame; the driving belt wheel is connected with a driven belt wheel fixed at the top of the bidirectional screw rod through a synchronous belt in a transmission way; the middle part normal running fit of two-way screw rod is on frame device, and the one end cooperation of crane is connected in the upper end of two-way screw rod, and the other end and the slip standpipe cooperation of crane are connected.
Preferably, the adsorption collecting device comprises an upper cylinder body, a lower cylinder body, an exhaust pipe with a one-way valve, a plug seat, a sliding plug board, a limit sliding block, a cross rod, a compression spring and a fixed block; the upper cylinder body is detachably connected with the lower cylinder body, the top of the upper cylinder body is provided with an exhaust pipe, and the bottom of the lower cylinder body is provided with a plug seat; one end of the sliding plugboard is in sliding fit in a horizontal slideway of the frame device, the other end of the sliding plugboard is spliced in the splicing seat, one end of the sliding plugboard is fixedly connected with the limiting slide block, and the limiting slide block is in sliding fit in a limiting slideway of the frame device; the limiting slide block is in sliding fit with the middle part of the cross rod, one end of the cross rod is fixed on the fixed block, the fixed block is fixed on the frame device, the compression spring is sleeved on the cross rod between the fixed block and the limiting slide block, and the fixed block and the plug seat are positioned at two ends of the limiting slide block; a filter membrane is arranged in the upper cylinder, and an adsorbent is arranged in the lower cylinder; the sampling tube is in sealing fit in the central through hole of the upper cylinder, and the sampling tube penetrates through the central hole of the filter membrane and is inserted into the adsorbent of the lower cylinder.
Preferably, the sampling tube comprises a fixed transverse tube, a rotary vertical tube, a first belt pulley, a second belt pulley, a sliding conveying tube, a sliding disc, a push-pull connecting rod and a regulating screw; the fixed transverse pipe is provided with an air outlet one-way valve, one end of the fixed transverse pipe is connected with an air outlet hole of the detachable cylinder cover, the other end of the fixed transverse pipe is in sealing and rotating connection with the upper end of the rotary vertical pipe, the middle part of the rotary vertical pipe is in sealing and rotating fit in a central through hole of the upper cylinder, and the lower end of the rotary vertical pipe is inserted into the lower cylinder; the first belt pulley is fixed on the rotary vertical pipe, the second belt pulley is fixed on the bidirectional screw rod, and the first belt pulley and the second belt pulley are in transmission connection through a synchronous belt; the lower end of the rotary vertical pipe is uniformly and circumferentially matched with four sliding conveying pipes in a sliding way, the inner ends of the sliding conveying pipes are respectively connected with one end of one push-pull connecting rod in a rotating way, the other ends of the four push-pull connecting rods are matched with a sliding disc in a rotating way, the sliding disc is matched in the rotary vertical pipe in a sealing sliding way, and the sliding disc is positioned below the sliding conveying pipes; the top of the regulating screw is rotationally connected with the center of the sliding disc, and the middle thread of the regulating screw is matched with the bottom surface of the rotary vertical pipe.
Preferably, the frame device comprises a frame body, travelling wheels, a lifting bracket, a guide vertical plate and a support column; four corners of the frame body are respectively connected with a travelling wheel in a rotary mode; the lifting support is positioned on the inner side of the frame body, the lifting support is in threaded fit with the lower end of the bidirectional screw rod, and four corners of the lifting support are respectively provided with a support column; the lower extreme of direction riser is fixed on the lifting support, and direction riser middle part sliding fit is in the upper and lower through-hole of frame body.
The application has the beneficial effects that: according to the automatic sampling and monitoring system for the volatile organic compounds in the atmosphere, the driving device capable of intermittently driving and controlling the sampling device and the lifting driving device to work is adopted, the sampling device can be driven to sample the environmental gases with different levels through the cooperation of the sampling device and the lifting driving device, the detection is conveniently carried out after the environmental gases with different levels are mixed, the accuracy of detecting the volatile organic compounds in the atmosphere is improved, and the monitoring effect of the volatile organic compounds in the atmosphere is improved; the frame device which can be lifted along with the lifting of the sampling device is arranged in the application, which is beneficial to expanding the range of the environmental gas which can be collected by the application, positioning the application and improving the stability of the sampling.
In order to make the above objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are required to be used in the description of the embodiments or the related art will be briefly described, and it is apparent that the drawings in the description below are some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 is a schematic diagram illustrating an embodiment of the present application;
FIG. 2 is a second overall schematic diagram according to an embodiment of the present application;
FIG. 3 is a cross-sectional view of an overall structure provided by an embodiment of the present application;
fig. 4 is a schematic structural diagram of a driving device according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a sampling device according to an embodiment of the present application;
FIG. 6 is a partial cross-sectional view of a sampling device according to an embodiment of the present application;
FIG. 7 is a schematic structural diagram of a first transmission assembly according to an embodiment of the present application;
FIG. 8 is a schematic structural view of a sampling tube according to an embodiment of the present application;
FIG. 9 is a schematic structural view of a sample tube according to an embodiment of the present application;
FIG. 10 is a partial cross-sectional view of a sample delivery tube according to an embodiment of the present application;
FIG. 11 is a schematic structural diagram of an adsorption collection device according to an embodiment of the present application;
fig. 12 is a schematic structural view of a frame device according to an embodiment of the present application;
fig. 13 is a schematic structural diagram of a lifting transmission device according to an embodiment of the present application.
Icon: a driving device 1; a drive motor 101; an irregular friction drive wheel 102; a stand 103; a sampling device 2; a first transmission assembly 201; a first friction wheel 201a; a first linkage shaft 201b; a first bearing frame 201c; a gear 201d; a rack 201e; a linkage plate 201f; pumping and pressing the connecting rod 202; a suction plate 203; a reset tension spring 204; a sampling cylinder 205; a removable cartridge cap 206; a sampling tube 207; a sampling nozzle 207a; slide standpipe 207b; a stationary standpipe 207c; an intake cross pipe 207d; a sampling tube 208; a fixed cross tube 208a; rotating standpipe 208b; a first pulley 208c; a second pulley 208d; a slide conveying pipe 208e; a slide plate 208f; push-pull link 208g; regulating and controlling a screw rod 208h; an adsorption collection device 3; an upper cylinder 301; a lower cylinder 302; an exhaust pipe 303; a socket 304; a slide insert 305; a limit slider 306; a crossbar 307; compressing the spring 308; a fixed block 309; a frame device 4; a frame body 401; road wheels 402; a lifting bracket 403; guide risers 404 and struts 405; a lifting transmission device 5; a second friction wheel 501; a worm 502; a second bearing frame 503; a worm wheel 504; a short axis 505; a driving pulley 506; a driven pulley 507; a bi-directional screw 508; and a lifting frame 509.
Detailed Description
In order to enable those skilled in the art to better understand the technical solutions of the present application, the technical solutions of the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled 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.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of a plurality of "a number" is two or more, unless explicitly defined otherwise.
It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the application to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the application, are not intended to be critical to the essential characteristics of the application, but are intended to fall within the spirit and scope of the application. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the application, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the application may be practiced.
The application is described in further detail below with reference to fig. 1-13.
Example 1
As shown in fig. 1-13, an automatic sampling and monitoring system for volatile organic compounds in the atmosphere comprises a driving device 1, a sampling device 2, an adsorption collecting device 3 and a frame device 4; the driving device 1 arranged on the frame device 4 is connected with the sampling device 2 in an intermittent transmission way so as to drive the sampling device 2 to collect the gas of the environment to be monitored; the sampling device 2 arranged on the frame device 4 is connected with the adsorption collecting device 3 in a matched manner so as to convey the collected gas into the adsorption collecting device 3 for adsorption filtration; the adsorption collecting device 3 is connected to the frame device 4 and is matched and connected with the gas chromatography-mass spectrometer so as to analyze and monitor the volatile organic compounds adsorbed and filtered through the gas chromatography-mass spectrometer.
According to the automatic sampling and monitoring system for the volatile organic compounds in the atmosphere, the internal driving device 1 can be intermittently driven to drive the sampling device 2 to sample the gas in the environment to be monitored after being started, the driving device 1 is driven to extract the gas in the environment to be monitored when being contacted with the sampling device 2, the gas in the sampling device 2 can be conveyed into the adsorption and collection device 3 to be adsorbed and treated when the driving device 1 is separated from the sampling device 2, then the volatile organic compound sample collected by adsorption is detected through the gas chromatography-mass spectrometer, and the concentration of the volatile organic compounds in the atmosphere in the position can be obtained by calculating according to the total volume of the gas sampled by the sampling device 2.
The driving device 1 comprises a driving motor 101, an irregular friction driving wheel 102 and a vertical frame 103; the driving motor 101 is fixed on the frame device 4 through a vertical frame 103, an irregular friction driving wheel 102 is fixed on an output shaft of the driving motor 101, and the irregular friction driving wheel 102 intermittently rubs and drives the sampling device 2. The driving motor 101 can drive the irregular friction driving wheel 102 to rotate after being started, and the irregular friction driving wheel 102 can drive the sampling device 2 to sample gas when rotating to be in contact with the sampling device 2.
The sampling device 2 comprises a first transmission assembly 201, a pumping connecting rod 202, a pumping disc 203, a reset tension spring 204, a sampling cylinder 205, a detachable cylinder cover 206, a sampling pipe 207 with an air inlet one-way valve and a sampling pipe 208 with an air outlet one-way valve; the sampling tube 205 is fixed on the frame device 4 through a tube frame, one end of the sampling tube 205 is a closed end, the other end is an open end, the open end of the sampling tube 205 is connected with a detachable tube cover 206 in a matching way, the detachable tube cover 206 is provided with a sampling tube 207 and a sampling tube 208, and the sampling tube 208 is connected with the adsorption collecting device 3; the inner end of the pressure pumping connecting rod 202 is fixedly connected with a pressure pumping plate 203 which is in sealing sliding fit in the sampling cylinder 205, the middle part of the pressure pumping connecting rod 202 is in sliding fit in the closed end of the sampling cylinder 205, the outer end of the pressure pumping connecting rod 202 is in matching connection with the first transmission assembly 201 so as to drive the pressure pumping plate 203 to slide in the sampling cylinder 205 in a direction away from the detachable cylinder cover 206 under the transmission of the first transmission assembly 201, and the gas in the environment to be monitored is pumped into the sampling cylinder 205 through the sampling pipe 207; two ends of the reset tension spring 204 are fixedly connected with the first transmission assembly 201 and the sampling tube 205 respectively.
When the irregular friction driving wheel 102 rotates to be in contact with the first driving assembly 201, the first driving assembly 201 can drive the pumping connecting rod 202 to slide outwards and stretch the reset tension spring 204, the pumping connecting rod 202 drives the pumping plate 203 to slide in the sampling cylinder 205 in a direction away from the detachable cylinder cover 206, at the moment, gas in the environment to be monitored can be pumped into the sampling cylinder 205 through the matching of the pumping plate 203 and the sampling cylinder 205 by the sampling tube 207 with the air inlet check valve, and when the irregular friction driving wheel 102 rotates to be separated from the first driving assembly 201, the pumping plate 203 can reset under the elastic force of the reset tension spring 204, so that the gas in the sampling cylinder 205 is conveyed into the adsorption collecting device 3 through the sampling tube 208 with the air outlet check valve for adsorption treatment.
The first transmission assembly 201 includes a first friction wheel 201a, a first linkage shaft 201b, a first bearing shaft frame 201c, a gear 201d, a rack 201e and a linkage plate 201f; the irregular friction driving wheel 102 intermittently friction-drives the first friction wheel 201a; the first friction wheel 201a and the gear 201d are fixed on a first linkage shaft 201b, the first linkage shaft 201b is in rotary fit on a first bearing shaft frame 201c, and the first bearing shaft frame 201c is fixed on the sampling tube 205; the gear 201d is meshed with a transmission rack 201e, and the rack 201e is in sliding fit in a guide slideway on the outer side surface of the sampling cylinder 205 through a guide edge; one end of the rack 201e is fixed to the linkage plate 201 f.
When the irregular friction driving wheel 102 rotates to be in contact with the first friction wheel 201a, the first linkage shaft 201b can be driven to rotate through the first friction wheel 201a, and then the gear 201d is driven to rotate, and the rack 201e is driven to slide in a direction away from the detachable cylinder cover 206 when the gear 201d rotates, so that the pumping connecting rod 202 is controlled to slide outwards through the linkage plate 201f and the reset tension spring 204 is stretched, and gas is conveniently pumped and collected.
The first friction wheel 201a comprises a first wheel body, a first screw and a positioning block; the irregular friction driving wheel 102 is connected with a first wheel body which is in sliding fit on the first linkage shaft 201b in an intermittent friction driving manner, one end of a first screw rod is in rotating fit on the first wheel body, the other end of the first screw rod is in threaded fit on a positioning block, and the positioning block is fixed on the first wheel body. The first friction wheel 201a is configured to stop the contact transmission with the irregular friction driving wheel 102, and when in use, the first screw is rotated to change the position of the first screw and the positioning block, so that the first wheel body can be driven to slide on the first linkage shaft 201b, and the first wheel body is controlled to contact or separate from the irregular friction driving wheel 102.
Example two
As shown in fig. 1-13, the automatic sampling and monitoring system for volatile organic compounds in the atmosphere further comprises a lifting transmission device 5; the sampling tube 207 includes a sampling nozzle 207a, a sliding standpipe 207b, a stationary standpipe 207c, and a horizontal inlet tube 207d; the top of the sliding vertical pipe 207b is fixed with a sampling nozzle 207a, the bottom of the sliding vertical pipe 207b is in sealing sliding fit in the fixed vertical pipe 207c, the bottom of the fixed vertical pipe 207c is connected with one end of an air inlet transverse pipe 207d, the other end of the air inlet transverse pipe 207d is connected in an air inlet hole of the detachable cylinder cover 206, and an air inlet one-way valve is arranged on the air inlet transverse pipe 207d; the top of the sliding vertical pipe 207b is connected to one end of the lifting transmission device 5 in a matching way, the lifting transmission device 5 is fixed on the frame device 4, and the other end of the lifting transmission device 5 is connected with the irregular friction transmission wheel 102 in an intermittent friction transmission way, so that the sliding vertical pipe 207b is driven to slide in the fixed vertical pipe 207c under the transmission of the irregular friction transmission wheel 102.
After the irregular friction driving wheel 102 is separated from the first driving assembly 201, the irregular friction driving wheel 102 is gradually contacted with the lifting driving device 5, so that intermittent upward sliding is performed in the fixed vertical pipe 207c through controlling the sliding vertical pipe 207b, the height of the sampling nozzle 207a on the sliding vertical pipe 207b is continuously increased, gases with different levels are collected, and finally the gases are mixed in the adsorption collecting device 3, so that the accuracy of detecting volatile organic compounds in the atmosphere is improved, and the monitoring effect of the volatile organic compounds in the atmosphere is improved.
The lifting transmission device 5 comprises a second friction wheel 501, a worm 502, a second bearing bracket 503, a worm wheel 504, a short shaft 505, a driving belt wheel 506, a driven belt wheel 507, a bidirectional screw 508 and a lifting bracket 509; the irregular friction driving wheel 102 intermittently rubs and drives a second friction wheel 501, the second friction wheel 501 is fixed at one end of a worm 502, the middle part of the worm 502 is in rotary fit on a second bearing frame 503, the second bearing frame 503 is fixed on the vertical frame 103, the other end of the worm 502 is meshed with a driving worm wheel 504, the worm wheel 504 and a driving pulley 506 are fixed on a short shaft 505, and the short shaft 505 is in rotary fit on the second bearing frame 503; the driving belt wheel 506 is connected and fixed with a driven belt wheel 507 at the top of the bidirectional screw 508 through a synchronous belt; the middle part of the bidirectional screw 508 is in rotary fit on the frame device 4, one end of the lifting frame 509 is connected to the upper end of the bidirectional screw 508 in a matched mode, and the other end of the lifting frame 509 is connected to the sliding vertical pipe 207b in a matched mode. When the irregular friction driving wheel 102 rotates to be in contact with the second friction wheel 501, the second friction wheel 501 can be driven to rotate by friction transmission, the worm 502 can be driven to rotate when the second friction wheel 501 rotates, the worm 502 can be meshed to drive the worm wheel 504 to rotate when the worm 502 rotates, the driving pulley 506 can be driven to rotate through the short shaft 505 when the worm wheel 504 rotates, the driving pulley 506 drives the driven pulley 507 to rotate through synchronous belt transmission, the driven pulley 507 drives the bidirectional screw 508 to rotate, thereby driving the lifting frame 509 to ascend or descend, when sampling is carried out, the continuous ascending state is achieved, the height of the sampling nozzle 207a is controlled to be continuously increased, when sampling is stopped, the first friction wheel 201a is controlled to be separated from the irregular friction driving wheel 102, then the irregular friction driving wheel 102 is controlled to reversely rotate, the lifting frame 509 is controlled to descend, or when the irregular friction driving wheel 102 is separated from the second friction wheel 501 is controlled to manually rotate, and the lifting frame 509 is controlled to descend.
The adsorption collecting device 3 comprises an upper cylinder 301, a lower cylinder 302, an exhaust pipe 303 with a one-way valve, a socket 304, a sliding plugboard 305, a limit sliding block 306, a cross rod 307, a compression spring 308 and a fixed block 309; the upper cylinder 301 and the lower cylinder 302 are detachably connected, the top of the upper cylinder 301 is provided with an exhaust pipe 303, and the bottom of the lower cylinder 302 is provided with a plug seat 304; one end of the sliding plugboard 305 is in sliding fit in a horizontal slideway of the frame device 4, the other end of the sliding plugboard 305 is spliced in the splicing seat 304, one end of the sliding plugboard 305 is fixedly connected with the limit sliding block 306, and the limit sliding block 306 is in sliding fit in a limit slideway of the frame device 4; the limiting slide block 306 is in sliding fit with the middle part of the cross rod 307, one end of the cross rod 307 is fixed on the fixed block 309, the fixed block 309 is fixed on the frame device 4, the compression spring 308 is sleeved on the cross rod 307 between the fixed block 309 and the limiting slide block 306, and the fixed block 309 and the plug seat 304 are positioned at two ends of the limiting slide block 306; a filter membrane is arranged in the upper cylinder 301, and an adsorbent is arranged in the lower cylinder 302; the sampling tube 208 is sealingly fitted in the central through-hole of the upper cylinder 301, and the sampling tube 208 passes through the central hole of the filter membrane and is inserted into the adsorbent of the lower cylinder 302.
The collected gas enters the upper cylinder 301 and the lower cylinder 302 through the sampling tube 208, volatile organic compounds in the gas are adsorbed by an adsorbent in the lower cylinder 302 and filtered by a filter membrane in the upper cylinder 301, the adsorbed and filtered gas is discharged through an exhaust pipe 303 with a one-way valve, and is analyzed and detected through a gas chromatography-mass spectrometer or other commercially available monitoring equipment, and the concentration of the volatile organic compounds in the atmosphere at the position can be obtained by calculating according to the total volume of the gas sampled by the sampling device 2; the adsorption collecting device 3 can be conveniently installed on the frame device 4, during installation, firstly, the sampling tube 208 is controlled to be inserted into the upper cylinder 301 and the lower cylinder 302, the sampling tube 208 plays a longitudinal limiting role, then the sliding insertion plate 305 is controlled to be inserted into the insertion seat 304, the sliding insertion plate 305 plays a transverse limiting role, thereby the installation of the adsorption collecting device 3 is completed, the sliding insertion plate 305 is kept in a state of being inserted into the insertion seat 304 under the elastic force of the compression spring 308, and when the adsorption collecting device 3 needs to be disassembled, the sliding limiting sliding block 306 drives the sliding insertion plate 305 to be separated from the insertion seat 304.
The sampling pipe 208 comprises a fixed transverse pipe 208a, a rotary vertical pipe 208b, a first belt pulley 208c, a second belt pulley 208d, a sliding conveying pipe 208e, a sliding disc 208f, a push-pull connecting rod 208g and a regulating screw 208h; an air outlet one-way valve is arranged on the fixed transverse pipe 208a, one end of the fixed transverse pipe 208a is connected with an air outlet hole of the detachable cylinder cover 206, the other end of the fixed transverse pipe 208a is connected with the upper end of the rotary vertical pipe 208b in a sealing and rotating way, the middle part of the rotary vertical pipe 208b is matched in the central through hole of the upper cylinder 301 in a sealing and rotating way, and the lower end of the rotary vertical pipe 208b is inserted into the lower cylinder 302; the first pulley 208c is fixed on the rotary standpipe 208b, the second pulley 208d is fixed on the bidirectional screw 508, and the first pulley 208c and the second pulley 208d are in transmission connection through a synchronous belt; the lower end of the rotary vertical pipe 208b is uniformly and circumferentially matched with four sliding conveying pipes 208e in a sliding mode, the inner ends of the sliding conveying pipes 208e are respectively connected with one end of one push-pull connecting rod 208g in a rotating mode, the other ends of the four push-pull connecting rods 208g are matched with a sliding disc 208f in a rotating mode, the sliding disc 208f is matched in the rotary vertical pipe 208b in a sealing and sliding mode, and the sliding disc 208f is located below the sliding conveying pipes 208e; the top of the regulating screw 208h is rotatably connected with the center of the sliding disc 208f, and the middle part of the regulating screw 208h is in threaded fit on the bottom surface of the rotary standpipe 208b.
The sampling tube 208 can perform the function of gas delivery and the function of mixing and stirring; the gas can be conveyed into the lower cylinder 302 through the fixed transverse pipe 208a, the rotary vertical pipe 208b and the sliding conveying pipe 208e and is mixed with the adsorbent in the lower cylinder 302, the second belt wheel 208d can rotate under the drive of the bidirectional screw 508, so that the first belt wheel 208c is driven to rotate, the first belt wheel 208c drives the rotary vertical pipe 208b to rotate, the sliding conveying pipe 208e at the lower end of the rotary vertical pipe 208b can extend outwards to the outer side of the rotary vertical pipe 208b, and therefore the adsorbent and the gas are mixed and stirred while the gas is conveyed through the sliding conveying pipe 208e, and the adsorption effect is improved; the position of the sliding conveying pipe 208e is adjusted through the adjusting screw 208h, the contact position between the sliding conveying pipe 208e and the bottom surface of the rotating vertical pipe 208b can be changed when the adjusting screw 208h is rotated, so that the sliding plate 208f is driven to slide up and down in the rotating vertical pipe 208b, the sliding plate 208f drives the four sliding conveying pipes 208e to slide inside and outside in the four sliding ways of the rotating vertical pipe 208b through the four push-pull connecting rods 208g, and therefore the sliding conveying pipes are contained in the rotating vertical pipe 208b or extend to the outer side of the rotating vertical pipe 208b.
Example III
As shown in fig. 1-13, the frame device 4 comprises a frame body 401, travelling wheels 402, a lifting bracket 403, a guide riser 404 and a strut 405; four corners of the frame body 401 are respectively connected with a travelling wheel 402 in a rotary manner; the lifting bracket 403 is positioned at the inner side of the frame body 401, the lifting bracket 403 is in threaded fit with the lower end of the bidirectional screw 508, and four corners of the lifting bracket 403 are respectively provided with a strut 405; the lower end of the guide vertical plate 404 is fixed on the lifting bracket 403, and the middle part of the guide vertical plate 404 is in sliding fit in the upper through hole and the lower through hole of the frame body 401. One end of the bidirectional screw 508 is provided with a left-handed thread, the other end of the bidirectional screw 508 is provided with a right-handed thread, when the bidirectional screw 508 rotates to drive the lifting frame 509 to ascend, the lifting frame 403 can be synchronously driven to move downwards and be gradually supported on the ground, at the moment, the distance between the lifting frame 403 and the frame body 401 gradually becomes larger, the travelling wheel 402 is controlled to be separated from the ground, the whole height of the frame device 4 becomes higher, the range of the environmental gas which can be acquired by the application is enlarged, the application can be positioned, and the stability of the sampling is improved; conversely, when the bidirectional screw 508 rotates to drive the lifting frame 509 to descend, the overall height of the frame device 4 is controlled to be reduced, and the travelling wheels 402 are gradually contacted with the ground, so that the whole device is convenient to move; the support column 405 and the lifting support 403 can be connected in a threaded fit manner, so that the four support columns 405 can be conveniently and respectively adjusted when the ground is uneven, the stability of the frame body 401 is improved, the support column 405 can be sleeved with a tensioning spring, two ends of the tensioning spring are controlled to be positioned between the base of the support column 405 and the lifting support 403, and the relative stability of the support column 405 and the lifting support 403 can be improved.
Principle of: according to the automatic sampling and monitoring system for the volatile organic compounds in the atmosphere, the internal driving device 1 can be intermittently driven to drive the sampling device 2 to sample the gas in the environment to be monitored after being started, the driving device 1 is driven to extract the gas in the environment to be monitored when being contacted with the sampling device 2, the gas in the sampling device 2 can be conveyed into the adsorption and collection device 3 to be adsorbed and treated when the driving device 1 is separated from the sampling device 2, then the volatile organic compound sample collected by adsorption is detected through the gas chromatography-mass spectrometer, and the concentration of the volatile organic compounds in the atmosphere in the position can be obtained by calculating according to the total volume of the gas sampled by the sampling device 2.
In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the application can be made without departing from the principles of the application and these modifications and adaptations are intended to be within the scope of the application as defined in the following claims.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (6)
1. An automatic sampling monitoring system for volatile organic compounds in the atmosphere is characterized in that: comprises a driving device (1), a sampling device (2), an adsorption collecting device (3) and a frame device (4); the driving device (1) arranged on the frame device (4) is connected with the sampling device (2) in an intermittent transmission manner so as to drive the sampling device (2) to collect the gas of the environment to be monitored; the sampling device (2) arranged on the frame device (4) is connected with the adsorption collecting device (3) in a matched manner so as to convey collected gas into the adsorption collecting device (3) for adsorption filtration; the adsorption collecting device (3) is connected to the frame device (4) and is matched and connected with the gas chromatography-mass spectrometer so as to analyze and monitor the volatile organic compounds adsorbed and filtered by the gas chromatography-mass spectrometer;
the driving device (1) comprises a driving motor (101), an irregular friction driving wheel (102) and a vertical frame (103); the driving motor (101) is fixed on the frame device (4) through a vertical frame (103), an irregular friction driving wheel (102) is fixed on an output shaft of the driving motor (101), and the irregular friction driving wheel (102) is connected with the sampling device (2) in an intermittent friction transmission manner;
the sampling device (2) comprises a first transmission assembly (201), a pumping connecting rod (202), a pumping disc (203), a reset tension spring (204), a sampling cylinder (205), a detachable cylinder cover (206), a sampling pipe (207) with an air inlet one-way valve and a sampling pipe (208) with an air outlet one-way valve; one end of the sampling tube (205) is a closed end, the other end of the sampling tube is an open end, the open end of the sampling tube (205) is connected with a detachable tube cover (206) in a matched mode, a sampling tube (207) and a sampling tube (208) are arranged on the detachable tube cover (206), and the sampling tube (208) is connected with the adsorption collecting device (3); the inner end of the pumping connecting rod (202) is fixedly connected with a pumping disc (203) which is in sliding fit with the sampling cylinder (205) in a sealing manner, the middle part of the pumping connecting rod (202) is in sliding fit with the closed end of the sampling cylinder (205), the outer end of the pumping connecting rod (202) is in matching connection with the first transmission assembly (201), so that the pumping disc (203) is driven to slide in the sampling cylinder (205) in a direction away from the detachable cylinder cover (206), and gas in the environment to be monitored is pumped into the sampling cylinder (205) through the sampling tube (207); two ends of the reset tension spring (204) are fixedly connected with the first transmission assembly (201) and the sampling cylinder (205) respectively;
also comprises a lifting transmission device (5); the sampling pipe (207) comprises a sampling nozzle (207 a), a sliding vertical pipe (207 b), a fixed vertical pipe (207 c) and an air inlet transverse pipe (207 d); the top of the sliding vertical pipe (207 b) is fixedly provided with a sampling nozzle (207 a), the bottom of the sliding vertical pipe (207 b) is in sealing sliding fit in the fixed vertical pipe (207 c), the bottom of the fixed vertical pipe (207 c) is connected with one end of an air inlet transverse pipe (207 d), the other end of the air inlet transverse pipe (207 d) is connected in an air inlet hole of the detachable cylinder cover (206), and an air inlet one-way valve is arranged on the air inlet transverse pipe (207 d); the top of the sliding vertical tube (207 b) is connected with one end of a lifting transmission device (5) in a matching way, the lifting transmission device (5) is fixed on the frame device (4), and the other end of the lifting transmission device (5) is connected with an irregular friction transmission wheel (102) in an intermittent friction transmission way so as to drive the sliding vertical tube (207 b) to slide in the fixed vertical tube (207 c) under the transmission of the irregular friction transmission wheel (102);
the lifting transmission device (5) comprises a second friction wheel (501), a worm (502), a second bearing bracket (503), a worm wheel (504), a short shaft (505), a driving belt wheel (506), a driven belt wheel (507), a bidirectional screw (508) and a lifting bracket (509); the irregular friction driving wheel (102) intermittently rubs and drives a second friction wheel (501), the second friction wheel (501) is fixed at one end of a worm (502), the middle part of the worm (502) is rotatably matched with a second bearing pedestal (503), the second bearing pedestal (503) is fixed on a vertical frame (103), the other end of the worm (502) is meshed with a driving worm wheel (504), the worm wheel (504) and a driving pulley (506) are fixed on a short shaft (505), and the short shaft (505) is rotatably matched with the second bearing pedestal (503); the driving belt wheel (506) is connected and fixed on a driven belt wheel (507) at the top of the bidirectional screw (508) through a synchronous belt; the middle part of the bidirectional screw rod (508) is in rotary fit on the frame device (4), one end of the lifting frame (509) is connected to the upper end of the bidirectional screw rod (508) in a matched mode, and the other end of the lifting frame (509) is connected to the sliding vertical tube (207 b) in a matched mode.
2. An automatic sampling and monitoring system for volatile organic compounds in the atmosphere according to claim 1, wherein: the first transmission assembly (201) comprises a first friction wheel (201 a), a first linkage shaft (201 b), a first bearing bracket (201 c), a gear (201 d), a rack (201 e) and a linkage plate (201 f); the irregular friction driving wheel (102) intermittently friction-drives a first friction wheel (201 a); the first friction wheel (201 a) and the gear (201 d) are fixed on a first linkage shaft (201 b), the first linkage shaft (201 b) is in rotary fit on a first bearing bracket (201 c), and the first bearing bracket (201 c) is fixed on the sampling cylinder (205); the gear (201 d) is meshed with the transmission rack (201 e), and the rack (201 e) is in sliding fit in a guide slideway on the outer side surface of the sampling cylinder (205) through a guide edge; one end of the rack (201 e) is fixed with the linkage plate (201 f).
3. An automatic sampling and monitoring system for volatile organic compounds in the atmosphere according to claim 2, wherein: the first friction wheel (201 a) comprises a first wheel body, a first screw and a positioning block; the irregular friction driving wheel (102) is connected with a first wheel body which is in sliding fit on a first linkage shaft (201 b) in an intermittent friction driving mode, one end of a first screw rod is in rotary fit on the first wheel body, the other end of the first screw rod is in threaded fit on a positioning block, and the positioning block is fixed on the first wheel body.
4. An automatic sampling and monitoring system for volatile organic compounds in the atmosphere according to claim 1, wherein: the adsorption collecting device (3) comprises an upper cylinder body (301), a lower cylinder body (302), an exhaust pipe (303) with a one-way valve, a socket (304), a sliding plugboard (305), a limit sliding block (306), a cross rod (307), a compression spring (308) and a fixed block (309); the upper cylinder body (301) is detachably connected with the lower cylinder body (302), the top of the upper cylinder body (301) is provided with an exhaust pipe (303), and the bottom of the lower cylinder body (302) is provided with a plug seat (304); one end of the sliding plugboard (305) is in sliding fit in a horizontal slideway of the frame device (4), the other end of the sliding plugboard (305) is spliced in the splicing seat (304), one end of the sliding plugboard (305) is fixedly connected with the limit sliding block (306), and the limit sliding block (306) is in sliding fit in the limit slideway of the frame device (4); the limiting slide block (306) is in sliding fit with the middle part of the cross rod (307), one end of the cross rod (307) is fixed on the fixed block (309), the fixed block (309) is fixed on the frame device (4), the compression spring (308) is sleeved on the cross rod (307) between the fixed block (309) and the limiting slide block (306), and the fixed block (309) and the inserting seat (304) are positioned at two ends of the limiting slide block (306); a filter membrane is arranged in the upper cylinder (301), and an adsorbent is arranged in the lower cylinder (302); the sampling tube (208) is in sealing fit in the central through hole of the upper cylinder (301), and the sampling tube (208) passes through the central hole of the filter membrane and is inserted into the adsorbent of the lower cylinder (302).
5. An automatic sampling and monitoring system for volatile organic compounds in the atmosphere according to claim 4, wherein: the conveying pipe (208) comprises a fixed transverse pipe (208 a), a rotary vertical pipe (208 b), a first belt pulley (208 c), a second belt pulley (208 d), a sliding conveying pipe (208 e), a sliding disc (208 f), a push-pull connecting rod (208 g) and a regulating screw (208 h); an air outlet one-way valve is arranged on the fixed transverse pipe (208 a), one end of the fixed transverse pipe (208 a) is connected with an air outlet hole of the detachable cylinder cover (206), the other end of the fixed transverse pipe (208 a) is connected with the upper end of the rotary vertical pipe (208 b) in a sealing and rotating way, the middle part of the rotary vertical pipe (208 b) is matched in the central through hole of the upper cylinder (301) in a sealing and rotating way, and the lower end of the rotary vertical pipe (208 b) is inserted into the lower cylinder (302); the first belt pulley (208 c) is fixed on the rotary vertical pipe (208 b), the second belt pulley (208 d) is fixed on the bidirectional screw rod (508), and the first belt pulley (208 c) and the second belt pulley (208 d) are in transmission connection through a synchronous belt; the lower end of the rotary vertical pipe (208 b) is uniformly and circumferentially matched with four sliding conveying pipes (208 e) in a sliding mode, the inner ends of the sliding conveying pipes (208 e) are respectively connected with one end of a push-pull connecting rod (208 g) in a rotating mode, the other ends of the four push-pull connecting rods (208 g) are matched with a sliding disc (208 f) in a rotating mode, the sliding disc (208 f) is matched in the rotary vertical pipe (208 b) in a sealing sliding mode, and the sliding disc (208 f) is located below the sliding conveying pipes (208 e); the top of the regulating screw rod (208 h) is rotationally connected with the center of the sliding disc (208 f), and the middle thread of the regulating screw rod (208 h) is matched with the bottom surface of the rotary vertical tube (208 b).
6. An automatic sampling and monitoring system for volatile organic compounds in the atmosphere according to claim 1, wherein: the frame device (4) comprises a frame body (401), travelling wheels (402), a lifting bracket (403), a guide vertical plate (404) and a strut (405); four corners of the frame body (401) are respectively connected with a travelling wheel (402) in a rotary mode; the lifting support (403) is positioned at the inner side of the frame body (401), the lifting support (403) is in threaded fit with the lower end of the bidirectional screw rod (508), and four corners of the lifting support (403) are respectively provided with a strut (405); the lower end of the guide vertical plate (404) is fixed on the lifting support (403), and the middle part of the guide vertical plate (404) is in sliding fit in the upper through hole and the lower through hole of the frame body (401).
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| CN114354848B (en) * | 2021-12-16 | 2022-12-09 | 江苏若比林环保设备有限公司 | Self-feedback temperature-increasing type indoor decoration gas detection device |
| CN114252305B (en) * | 2021-12-21 | 2024-03-08 | 宁夏农林科学院植物保护研究所（宁夏植物病虫害防治重点实验室） | Simple collecting device and method suitable for plant volatile compounds |
| CN115144235B (en) * | 2022-09-02 | 2022-11-25 | 山东中程试验检测有限公司 | Indoor environmental pollutant detects, clean system |
| CN118130181B (en) * | 2024-05-08 | 2024-07-19 | 陕西省地质调查实验中心 | Methane sampling device and method thereof |
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