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WO2008043281A1 - Échantillonneur de gaz automatique - Google Patents

Échantillonneur de gaz automatique Download PDF

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Publication number
WO2008043281A1
WO2008043281A1 PCT/CN2007/003043 CN2007003043W WO2008043281A1 WO 2008043281 A1 WO2008043281 A1 WO 2008043281A1 CN 2007003043 W CN2007003043 W CN 2007003043W WO 2008043281 A1 WO2008043281 A1 WO 2008043281A1
Authority
WO
WIPO (PCT)
Prior art keywords
guiding
sampling
disposed
shaft
base
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2007/003043
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English (en)
Chinese (zh)
Other versions
WO2008043281A8 (fr
Inventor
Yu'e Li
Francis M. Kelliher
Yunfan Wan
Zheng Li
Chengfeng Tong
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO2008043281A1 publication Critical patent/WO2008043281A1/fr
Publication of WO2008043281A8 publication Critical patent/WO2008043281A8/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/26—Devices for withdrawing samples in the gaseous state with provision for intake from several spaces
    • 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
    • G01N1/10—Devices for withdrawing samples in the liquid or fluent state
    • G01N1/18—Devices for withdrawing samples in the liquid or fluent state with provision for splitting samples into portions
    • G01N2001/185—Conveyor of containers successively filled

Definitions

  • the present invention relates to a gas sampler, and more particularly to a device for automatically collecting gas samples.
  • gas samplers at home and abroad there are many types of gas samplers at home and abroad, and their functions are different. Mainly can be divided into two categories, one is portable gas sampler, most of which are battery-powered, including flow controller, dry filter system, sample pump, timer or microprocessor, liquid crystal display, more typical Wuhan analysis
  • portable gas sampler most of which are battery-powered, including flow controller, dry filter system, sample pump, timer or microprocessor, liquid crystal display, more typical Wuhan analysis
  • the QG-3 gas sampler produced by the instrument factory, the AIRMETRICS PM10 series from the United States, the GS-3B atmospheric sampler from the Shanghai Hongyu Environmental Protection Application Research Institute, and the AL-430 atmospheric sampler produced in Japan.
  • the top surface of the guide disc is provided with a spiral guide groove, and the periphery is provided with a tooth that can mesh with a gear on the main shaft of the reduction motor.
  • the guiding arm has two upper and lower sheets, and the guiding disc is sandwiched therein, one end of the guiding arm is fixed on the side shaft, and the upper layer of the other end is positioned on the side a guiding head and a positioning detecting device in the guiding groove, wherein the sample tray is provided with a sample container receptacle arranged equidistantly with a spiral corresponding to the guiding slot; a control device for controlling the sampling device Action
  • the configuration and operation of the geared motor ; a power supply, power the control means. '
  • the control device includes a processor pre-configured with a control program, a memory connected to the processor, a display device, and an operation button, and the control command of the processor passes through the interface circuit.
  • the sampling device, the operating mechanism, and the geared motor are connected.
  • a magnetic steel is embedded in the starting and ending positions of the guiding groove, and the center of the guiding groove is equidistantly disposed corresponding to the sample container receptacle on the sample tray. hole.
  • the positioning detecting device disposed on the guiding arm is a photoelectric sensing device, and the photoelectric transmitting tube of the photoelectric sensing device is disposed at a position corresponding to the guiding head of the lower layer of the guiding arm
  • the photoelectric receiving tube is embedded in the guiding head, and the detection signal of the photoelectric sensing device is input to the control device through a line.
  • the positioning detecting device further includes two Hall switches capable of inducing a magnetic field, for detecting the starting and ending positions of the guiding slot, and the detecting signal is also input through the line. Control device.
  • the main shaft of the supporting device and the side shaft of the positioning device are respectively disposed on the base through bearings.
  • the invention has the following advantages: 1.
  • the invention adopts a sample tray provided with a spiral guiding groove, and can densely place a large number of sample bottles on one sample tray, without requiring the operator to frequently change the sample bottle. Meet the requirements for automatic sample collection.
  • the sample tray of the spiral guiding groove used in the invention can not only place a larger number of sample bottles, but also saves space occupied, reduces the volume of the device, and is convenient to carry.
  • the invention is provided with a plurality of sampling solenoid valves, which can realize multi-channel sampling, and can satisfy samples collected from a plurality of different gas sources during automatic sampling. 4.
  • the invention is powered by a DC power supply, which not only satisfies The use of portable equipment requires, and can reduce operating costs.
  • Figure 1 is a general distribution connection diagram of the present invention
  • Figure 2 is a cross-sectional view of the needle holder of the present invention.
  • Figure 3 is a plan view of the upper cylinder bracket of the present invention.
  • Figure 4 is a cross-sectional view of the lower cylinder bracket of the present invention.
  • Figure 5 is a plan view of the bottle stopper arm of the present invention.
  • Figure 6 is a cross-sectional view of the bottle stopper arm of the present invention.
  • Figure 7A is a plan view of the guide disk of the present invention.
  • Figure 7B is a partial enlarged view of the guide groove on the guide plate of the present invention.
  • Figure 8 is a plan view of the sample tray of the present invention.
  • Figure 9 is a schematic diagram of a control circuit of the present invention.
  • Figure 10 is a flow chart of the operation of the present invention.
  • the present invention includes a base 10 on which a sampling device 20, a positioning device 30, an action mechanism 40, a support device 50, a control device 60, and a power source 70 are disposed.
  • the sampling device 20 includes a sampling solenoid valve group 21, a gas collection pump 22, a needle holder 23, an injection head 24, and a plurality of sample containers 25.
  • the sampling solenoid valve group 21 is disposed on one side of the base 1, and includes a plurality of electromagnetic valves, each of which is an independent gas collecting passage.
  • the number of solenoid valves is more than two, and can be set as required, such as setting 10.
  • the sampling solenoid valve group 21 is connected to the helium gas pump 22 through an air guiding pipe, and the gas collecting pump 22 uses a diaphragm pump having a diaphragm whose air outlet communicates with the needle holder 23 through the air guiding tube. As shown in FIG.
  • the needle holder 23 has a connecting rod 231, two communicating openings 232, 233, wherein one opening 233 communicates with the air outlet of the gas pump 22 through the air duct, and the other opening 232 communicates with the injection head 24 by injection.
  • the head 24 injects gas into the sample container 25.
  • the connecting portion of the needle holder 23 and the injection head 24 is a hollow cylinder (not shown) provided with an outer ridge, and the injection head 24 is locked to the needle holder 23 by a nut.
  • an O-ring 234 is provided between the needle holder 23 and the injection head 24 to ensure airtightness.
  • the injection head 24 of the present invention can be used with a conventional injection needle.
  • the sample container 25 is a flat-bottomed screw gas sample bottle made of glass, and a small round hole is formed in the center of the top plastic cover to allow the injection head 24 to pass through, and a rubber gasket is arranged in the cover.
  • the positioning device 30 includes a side shaft 31 disposed on the side of the base 10, and the side shaft 31 adopts a sleeve structure.
  • the sleeve is sleeved with upper and lower cylinder brackets 32, 33, and a stopper arm 34, which is locked to the side shaft by screws.
  • the sleeve is provided with a positioning groove, and the side shaft 31 has a projection thereon, so that the sleeve can be caught on the side shaft 31.
  • the top of the side shaft 31 is also provided with internal threads, and the sleeve can be locked by a bolt, so that the upper and lower cylinder brackets 32, 33 and the stopper arm 34 are firmly positioned on the side shaft 31 through the sleeve.
  • a cylinder fixing seat 321 is provided at the end of the upper and lower cylinder brackets 32, 33, and a through hole 331 (shown in FIG. 4) is disposed at a corresponding position on the lower cylinder bracket 33.
  • a pinhole 341 (shown in Figures 5 and 6) through which the injection head 24 can pass is disposed at the position of the stopper arm 34 corresponding to the injection head 24.
  • the pinhole 341 functions to reinforce the needle 24 and increase the strength of the needle when the injection head 24 is pulled down to prevent the needle from being bent or broken.
  • the stopper arm 34 can block the sample bottle, and the injection head 24 can be pulled out from the sample bottle, and the sample bottle is returned by gravity.
  • the moving mechanism 40 includes an air pump 41, a needle solenoid valve 42, a needle withdrawal solenoid valve 43 and a two-way cylinder 44.
  • the air pump 41, the needle solenoid valve 42 and the needle withdrawal solenoid valve 43 are all disposed on the base 10, and the two-way cylinder 44 is fixed on the cylinder fixing seat 321 of the upper and lower cylinder brackets 32, 33, and the air pump 41 passes through the air guiding tube and The pneumatic connection of the two-way cylinder 44.
  • the cylinder shaft 441 is coupled to the connecting rod 231 of the needle holder 23 so that the needle holder 23 can be interlocked with the cylinder shaft 441.
  • the supporting device 50 includes a main shaft 51 disposed at the center of the base 10, and an upper end thereof is provided with an internal thread to be fixed by a bolt.
  • a guide disc 52 is sleeved on the main shaft 51.
  • the top surface of the guide disc 52 is provided with a spiral guiding groove 521, and a positioning hole 522 corresponding to the sample bottle is disposed at a center equidistant distance (as shown in FIG. 7B).
  • a cylindrical magnetic steel 523 (Fig. 7A) is embedded in the start and end positions of the guide groove 521, respectively.
  • the periphery of the guide disc 52 is provided with a tooth 524 for meshing with a gear 56 provided on the main shaft of the DC motor 53 to be rotated by the motor 53.
  • a guiding arm 54 is divided into two upper and lower sheets, and the guiding disc 52 is sandwiched therein. One end of the guiding arm 54 is fixed on the side shaft 31 through the top wire seat, and the upper layer of the other end is provided with
  • the metal guiding head 541 has a guiding head 541 extending in the guiding groove 521 and moving along the guiding groove 521.
  • the guiding head 541 is made of metal such as aluminum, stainless steel or copper.
  • This embodiment is made of copper with moderate hardness, ductility and friction to obtain a smooth sliding effect of the guiding head in the guiding groove 521.
  • a photoreceiving tube 542 is also embedded in the guiding head 541.
  • a photo-emission tube 543 is provided at a position corresponding to the photoreceiving tube 542 on the lower sheet of the guide arm 54. When the light emitted from the photo-emissive tube 543 is received by the photoreceiver 542 through the positioning hole 522, the position of the vial can be determined.
  • the guide arm 54 is further provided with two Hall switches 544 capable of inducing a magnetic field, corresponding to the magnets embedded in the start and end positions of the guide grooves 521, for detecting the initial and end positions of the guide disc 52.
  • the position signals detected by the photo-sensing device and the Hall switch 544 are transmitted to the control device 60 through the line.
  • the guiding arm 54 is made of a circuit board, which can realize the guiding and positioning function of the guiding arm and simultaneously complete the transmission signal. The function of the number. a sample tray 55 for inserting a sample container 25.
  • the sample tray 55 is connected by three upper, lower, and lower discs through four connecting rods 551 evenly distributed on the outer circumference, and a sleeve 552 which is sleeved on the main shaft 51 is disposed at the center.
  • the sleeve 552 is provided with a fitting groove 553.
  • the corresponding position on the main shaft 51 is provided with a protrusion 511, and the protrusion 511 is embedded in the insertion groove 553 to be fitted and positioned.
  • the upper and middle plates of the sample tray 55 are provided with sample vials 553 arranged equidistantly from the guide grooves 521, and the number of the insertion holes 553 can be flexibly set according to the size of the sample tray 55 and the thickness of the sample bottle. From tens to hundreds of them (as shown in Figure 8), that is, one hundred samples can be automatically completed at one time.
  • the control device 60 has a core 61.
  • the present invention employs a general-purpose 8051 microprocessor, and the microprocessor 61 is pre-programmed with a control program.
  • the microprocessor 61 is also connected to a memory 62, a liquid crystal display panel 63 and an operation button 64.
  • the control commands of the microprocessor 61 are connected to the controlled components via the interface circuit 65.
  • the microprocessor 61, the memory 62, the liquid crystal display panel 63 and the operation button 64 are mounted in a box body, the liquid crystal display panel 63 and the operation button 64 are disposed on the surface of the box body, and the interface circuit 65 is disposed on the base 10.
  • the microprocessor 61 disposed in the casing is connected by wire.
  • the microprocessor 61 also has an external RS232 computer interface, which can input the parameters of the gas production through an external computer.
  • the power source 70 which supplies power to the control unit 60, uses a 12 volt DC power source.
  • This embodiment uses a battery. 10, during operation of the present invention is as follows: t
  • the control device 60 When the power source 70 is turned on, the control device 60 initializes the system and performs self-test. After completion, the parameters such as the time of gas collection, the gas path and the pipeline cleaning are input through an external computer or through the liquid crystal display panel 63 and the operation button 64.
  • the control device 60 determines whether the gas collection time is reached. When the gas recovery time is reached, the gear on the DC motor 53 drives the guide disk 52 to move, and the guide disk 52 is further fixed to the spindle.
  • the sample tray 55 on the 51 is rotated, and at the same time, the guiding head 541 on the guiding arm 54 moves in the guiding groove 521, detects the position of the positioning hole 522 and drives the side shaft 31 to rotate, when the guiding head 541 moves and detects When the positioning hole 522 in the corresponding guiding groove 521 is stopped, the motor 53 stops moving. At this time, the guiding arm 54 also drives the two-way cylinder 44 and the needle holder 23 on the side shaft 31 to rotate above the corresponding sample bottles in the sample tray. Preparation for sampling.
  • the control unit 60 then issues an instruction to open a corresponding solenoid valve and gas collection pump 22 in the sampling solenoid valve block 21, and the gas is pumped from the corresponding gas collection passage to the injection head 24 for gas cleaning by the gas collection pump 22.
  • the air pump 41 and the needle are activated.
  • the solenoid valve 42 presses the air into the upper air chamber of the thin bidirectional cylinder 44 through the air pump 41.
  • the compressed air drives the cylinder shaft 441.
  • the cylinder shaft 441 drives the needle holder 23 and the injection head 24 connected to the shaft to move downward.
  • the head 24 pierces the rubber gasket at the top of the vial and pumps the gas pumped from the gas pump 22 into the vial.
  • the control device 60 issues an instruction to close the corresponding solenoid valve and the air pump 41 in the sampling solenoid valve group 21, so that the compressed gas in the air chamber of the cylinder 44 is discharged through the exhaust port of the needle solenoid valve 42. Then, the air pump 41 and the needle removing solenoid valve 43 are activated to press air into the lower air chamber of the thin two-way cylinder 44 through the air pump 41, and the compressed air drives the cylinder shaft 441 to drive the needle holder 23 and the injection head 24 connected to the shaft.
  • the injection head 24 moves up with the sample vial, at which time the stopper arm 34 blocks the sample vial, and the injection head 24 continues to move upwards from the vial, and the rubber seal on the top of the vial is elastically
  • the needle hole is sealed, and the gas is sealed in the sample bottle under a certain pressure, and the sample bottle is automatically returned by gravity.
  • the control device 60 issues a command to close the withdrawal solenoid valve 43 and the air pump 41 to allow the compressed air in the lower chamber of the cylinder 44 to pass through.
  • the exhaust port of the needle solenoid valve 43 is exhausted, and then the gas path of the gas pump 22 and the sampling solenoid valve group 21 is closed to complete the sampling process of the gas sample.
  • the control device 60 reads the next helium information and prepares for the next sampling process.
  • a fixed bearing 11 may be added to the bottom of them.
  • the bearing housing 111 of the second fixed bearing 11 is fixed on the base 10.
  • Two bearing 112 are disposed in each bearing housing 111, and the spindle 51 and the side shaft 31 are placed therein to receive stable and smooth rotation.
  • the automatic gas sampler of the invention can densely place a large number of sample bottles on one sample tray, which saves space occupied, reduces the volume of the device, and does not require frequent replacement of the sample bottles by the operator, and can meet the requirements for automatic sample collection.
  • the invention can realize multi-channel sampling, and can satisfy samples collected from a plurality of different gas sources during automatic sampling.
  • the invention is powered by a DC power source, which not only meets the requirements of portable equipment, but also reduces operating costs.
  • the automatic gas sampler of the present invention is therefore particularly suitable for industrial manufacturing and industrial applications.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

L'invention concerne un échantillonneur de gaz automatique comprenant les parties suivantes : une base (10); un moyen d'échantillonnage (20) qui comprend un groupe d'électrovannes d'échantillonnage (21), une pompe d'échantillonnage de gaz (22), une base de seringue (23), une seringue (24) montée sur la base de seringue (23), ainsi qu'une pluralité de contenants d'échantillonnage (25); un moyen de positionnement (30) qui comprend une tige latérale (31) fixée à la base (10) et pouvant monter et descendre par rotation, un élément support de cylindre supérieur et un élément support de cylindre inférieur (32, 33) placés transversalement sur la tige latérale (31), un bras de blocage (34) pour les contenants d'échantillonnage (25), une base de fixation de cylindre (321) étant respectivement placée sur l'élément support de cylindre supérieur et inférieur (32, 33); un moyen d'entraînement (40) qui comprend une pompe à gaz (41) placée sur la base (10), une électrovanne (42) pour entraîner la seringue et une électrovanne (43) pour retirer la seringue, ainsi qu'un cylindre bidirectionnel (44) placé sur la base de fixation de cylindre (321); un moyen de support (50) qui comprend une tige principale (51), une plaque de guidage (52), un bras de guidage (54) et une plaque d'échantillonnage (55), la tige principale (51) étant fixée au centre de la base (10), la plaque de guidage (52) et la plaque d'échantillonnage (55) étant montées axialement sur la tige principale (51), une rainure de guidage hélicoïdale (521) étant réalisée à la surface supérieure de la plaque de guidage (52) et des dents (524) étant formées sur la circonférence; un moyen de commande (60) servant à commander le mouvement du moyen d'échantillonnage (20) et du moyen d'entraînement (40); une alimentation (70). L'invention est utilisable dans le domaine de la protection de l'environnement et permet à la fois l'échantillonnage et la surveillance de la qualité de l'air.
PCT/CN2007/003043 2006-09-11 2007-10-26 Échantillonneur de gaz automatique Ceased WO2008043281A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNU2006201194471U CN200952977Y (zh) 2006-09-11 2006-09-11 自动气体采样器
CN200620119447.1 2006-09-11

Publications (2)

Publication Number Publication Date
WO2008043281A1 true WO2008043281A1 (fr) 2008-04-17
WO2008043281A8 WO2008043281A8 (fr) 2008-08-07

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PCT/CN2007/003043 Ceased WO2008043281A1 (fr) 2006-09-11 2007-10-26 Échantillonneur de gaz automatique

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WO (1) WO2008043281A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103743603A (zh) * 2013-12-27 2014-04-23 江苏省淡水水产研究所 一种应用于淡水池塘生态系统交换的气体采集装置及其采集气体的方法
CN111044651A (zh) * 2020-01-06 2020-04-21 中国农业科学院农业环境与可持续发展研究所 一种气体同位素光谱仪自动进样器
CN111707509A (zh) * 2020-07-23 2020-09-25 合肥中盛水务发展有限公司 一种应用于除臭环境气体检测机器人
CN112662535A (zh) * 2020-12-03 2021-04-16 中国人民解放军军事科学院军事医学研究院 一种空气微生物采样装置
CN113240852A (zh) * 2021-05-25 2021-08-10 仓鼠科技(北京)有限公司 无动力自助售货设备
CN113311118A (zh) * 2021-07-08 2021-08-27 江西应用技术职业学院 一种空气环境质量氧气浓度检测装置
CN113607503A (zh) * 2021-07-27 2021-11-05 大唐珲春发电厂 气体取样器
CN116735793A (zh) * 2023-06-06 2023-09-12 南京国环科技股份有限公司 一种大气污染监测装置及监测方法

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CN200952977Y (zh) * 2006-09-11 2007-09-26 万运帆 自动气体采样器
CN101659921B (zh) * 2009-09-02 2012-07-25 青岛众瑞智能仪器有限公司 全自动微生物采样器
CN105136529B (zh) * 2015-09-23 2018-02-27 中国科学院水利部成都山地灾害与环境研究所 一种气体自动连续采集系统
CN108882496A (zh) * 2018-06-28 2018-11-23 中国原子能科学研究院 针对加速器的换靶机构的定位系统及其定位方法
CN110057630B (zh) * 2019-05-05 2021-05-18 东北大学 一种阿基米德螺线式质谱仪连续性变压取样装置及方法
CN111077000B (zh) * 2020-01-06 2025-02-07 中国农业科学院农业环境与可持续发展研究所 一种多功能气体前处理装置

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US3884081A (en) * 1974-06-24 1975-05-20 California Inst Of Techn Automated sequential air sampler
US4274285A (en) * 1980-01-11 1981-06-23 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Automated syringe sampler
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103743603A (zh) * 2013-12-27 2014-04-23 江苏省淡水水产研究所 一种应用于淡水池塘生态系统交换的气体采集装置及其采集气体的方法
CN111044651A (zh) * 2020-01-06 2020-04-21 中国农业科学院农业环境与可持续发展研究所 一种气体同位素光谱仪自动进样器
CN111707509A (zh) * 2020-07-23 2020-09-25 合肥中盛水务发展有限公司 一种应用于除臭环境气体检测机器人
CN111707509B (zh) * 2020-07-23 2024-05-17 安徽中盛智能科技有限公司 一种应用于除臭环境气体检测机器人
CN112662535A (zh) * 2020-12-03 2021-04-16 中国人民解放军军事科学院军事医学研究院 一种空气微生物采样装置
CN112662535B (zh) * 2020-12-03 2022-08-26 中国人民解放军军事科学院军事医学研究院 一种空气微生物采样装置
CN113240852A (zh) * 2021-05-25 2021-08-10 仓鼠科技(北京)有限公司 无动力自助售货设备
CN113311118A (zh) * 2021-07-08 2021-08-27 江西应用技术职业学院 一种空气环境质量氧气浓度检测装置
CN113311118B (zh) * 2021-07-08 2022-09-16 江西应用技术职业学院 一种空气环境质量氧气浓度检测装置
CN113607503A (zh) * 2021-07-27 2021-11-05 大唐珲春发电厂 气体取样器
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