CN105954071A - Miniaturized sample collecting device used for gas sampling - Google Patents
Miniaturized sample collecting device used for gas sampling Download PDFInfo
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- CN105954071A CN105954071A CN201610391338.3A CN201610391338A CN105954071A CN 105954071 A CN105954071 A CN 105954071A CN 201610391338 A CN201610391338 A CN 201610391338A CN 105954071 A CN105954071 A CN 105954071A
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- gas
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- diaphragm pump
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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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a miniaturized sample collecting device adopting the combination of a diaphragm pump and a four-way ball valve. The miniaturized sample collecting device is composed of the diaphragm pump, the four-way ball valve, a sampling gas bottle and a gas pipeline. A positive and negative pressure dual-purpose gas pump is adopted as the diaphragm pump, and the diaphragm pump can be used for generating the vacuum low-pressure condition and obtaining high-pressure gas. The four-way ball valve is connected with a gas inlet of the diaphragm pump, a gas outlet of the diaphragm pump, the sampling gas bottle and a sample gas connector through clamping sleeve connectors capable of achieving fast connection. A national standard all-metal gas spray pot is adopted as the sampling gas bottle, and the miniaturized sample collecting device is small, light, low in cost and free of pollution. Gas pipelines are all connected through clamping sleeve connectors. The working states of the diaphragm pump are switched by means of the four-way ball valve to carry out air exhaust and air inflation on the sampling gas bottle. By means of circulating switching, cleaning pretreatment of the sampling gas bottle is achieved, and finally, high-pressure sample gas is filled into the sampling gas bottle.
Description
Technical field
The present invention relates to a kind of miniaturization sample collecting apparatus for gas sample, can enter as required
The gas sampling that row is quick, portable, it is adaptable to cannot be carried out on-line checking or need not measure in real time,
The field of off-line analysis is carried out by gas sampling.
Background technology
When carrying out gas analysis, it is necessary first to gas is sampled.According to the purpose analyzed, sample
The composition of product and concentration level thereof, sample physicochemical properties (dissolubility of sample, vapour pressure,
Chemical reactivity etc.) determine to use any collection sample method.The usual method of sampling has
Line sampling and off-line are sampled, and the off-line method of sampling mainly has directly collection, enrichment to gather and chemical reaction
Gather.Wherein directly acquisition method is one of most common method, is also the simplest and network minimal
Method, sample only need to be directly introduced into the overall process just completing sampling among sampling container by it.
Sampling container is broadly divided into rigid container and plastic container: rigid container is mainly by glass or metal
Alloy material is made, such as glass sampling bottle, air-tightness glass syringe, rustless steel sampling bottle etc.；Mould
The airbag that property container predominantly high molecular synthetic material is made, such as polyester bag, politef bag and aluminum
The plasticity gas pouch etc. that paper tinsel is reinforced.When using container directly to gather air and steam sample, all also exist
Sample cause sample composition to change in a reservoir due to adsorbed and phenomenon of osmosis or they
The problem that loss occurs in concentration.Compared with plastic container, rigid container has preferably guarantor in this respect
The characteristic of storage sample product, can be with Reusability, and particularly rustless steel container is more satisfactory sampling tool；
Rigid container there is also relatively costly simultaneously, needs complicated cleaning procedure, and the sample of collection needs height
The shortcomings such as bigger sample utilisation could be obtained after the pressurized operation of pure inert gas.Work as sampling container
When needing to reuse, it is necessary to before every time gathering sample, shuttle is carried out, hunt leak and
The programs such as detection.Common cleaning method is container to carry out evacuation repeatedly and is filled with high pure nitrogen
Or zero air become the operation of malleation for several times.The airtight situation of container is checked, by taking out by pressure change
In extracting container, the air sample of part is analyzed checking the wash result of container.
Rigid container can use the method for evacuation in advance to carry out the sample collection at scene: i.e. receives at sample
Before collection, rigid container is evacuated, opens container valve in sample collecting place or locus
Can be automatically introduced among container by gaseous sample, this method can the most directly gather air
Sample and without any power-equipment.Can also utilize sampling air pump that gaseous sample is directly introduced into appearance
In device, make container form malleation, thus the sample in container automatically and exactly can be discharged
Out, to carry out further sample analysis.
The governing factor of gaseous sample gatherer process mainly includes acquisition time control, gathers flow-control
Control etc. with sample collecting volume.Equipped with pressure vacuum gauge and gas flow regulating valve on rigid container
Deng, can control to gather the time cycle of sample by the method controlling the flow of sampling pump.By using
Container volume size and container in pressure control the collection capacity of sample.In general gas is gathered
It is all to complete moment with steam sample.
Summary of the invention
The technical problem to be solved in the present invention is:
When using forvacuum mode to carry out gaseous sample collection, if needed through long-distance transport ability
Arriving sample collection location, in transportation, the container of forvacuum is likely to occur leakage, it is impossible to
Ensure the reliability of gas collecting；If carrying out pretreatment in the position gathering sample, then need extra
Vacuum equipment, transport, power supply etc. are brought a lot of problem, also cannot adapt to field acquisition work.
It addition, the selection of gas container also must be considered that the problem of cost and transport, gas cylinder cost is relatively
Height, and common transport pathway can not be used to transport.The invention is intended to solve above-mentioned forvacuum method
The leakage problem caused and high, the not readily transportable problem of gas container cost, propose a kind of miniaturization
Gaseous sample gathers solution.
The technical solution adopted in the present invention is:
The method utilizing sampling pump to fill barotropic gas carries out gas sampling: select the barrier film that positive/negative-pressure is dual-purpose
Air pump carries out gas sampling, and this pump both can be with evacuation, it is also possible to use as air press,
Gas collecting scene utilizes sample gas that sampling gas cylinder is carried out pretreatment, and is filled by sample gas
Install to sample in gas cylinder；All-metal GB inhalator jar selected by sampling gas cylinder, and this container uses aluminium alloy material
Material integrated punching or tinplate material resistance are welded, it is ensured that the while of bubble-tight, also can be just
Pressure work；Reach as high as 13 atmospheric pressure, the method reduction of gas pressure can be filled by raising
Gas container volume, reduces transport difficulty and cost；Sampling gas cylinder valve uses GB aerosol valve,
Gas sealing ability is good, and inflation/deflation operation can be repeated, and service life is long；Sampling gas cylinder TBW
Measuring light, for mass production commodity, with low cost, being suitable for gas sampling and long-time preservation etc. should
With；Four way ball valve is used to realize the one key switching that sampling gas cylinder is bled and inflated, simple and efficient, reduce
The risk of maloperation.
The principle of the present invention is:
Use sample gas that sampling gas cylinder is carried out, solve forvacuum method in transportation
The problem that middle air is leaked into gas cylinder；After evacuation fills positive pressure operation the most repeatedly, in gas cylinder
The content of original pollutant is reduced to negligible level, it is to avoid the mistake during sample collecting
Difference；Sampling gas cylinder fills barotropic gas so that the gas that sampling terminates in rear environment can not enter gas
Bottle, it is ensured that the correctness of sampled result.Diaphragm air pump is entirely without oil pump, sample will not be produced dirt
Dye.All-metal sampling gas cylinder also will not introduce sampling deviation because of adsorbed gas etc..
The present invention compared with prior art have the advantage that is as follows:
The present invention uses positive/negative-pressure dual-purpose miniature diaphragm air pump, both can be used to produce vacuum low-pressure bar
Part, can be used to again obtain gases at high pressure, uses same instrument can realize the cleaning to sampling gas cylinder
Pretreatment fills with gases at high pressure；
The present invention uses manual type four way ball valve to carry out the switching between working state of system, it is achieved
Evacuation and the operating in a key filling high pressure, be especially suitable for field sampling operation；
The present invention uses all-metal fast interface integrated design, population structure compact
(135mm*110mm*101mm), weight light (less than 3 kilograms), carry with easy to use,
It is suitable for the application of all kinds of gas collectings.
Accompanying drawing explanation
Fig. 1 is that miniaturization gas sample collection apparatus is bled principle schematic；
Fig. 2 is that miniaturization gas sample collection apparatus inflates principle schematic；
Wherein: 1 is the dual-purpose diaphragm air pump of positive/negative-pressure, and 2 is four way ball valve, 3 is sampling gas cylinder, and 4 are
Air pressure gauge.
Detailed description of the invention
Membrane pump uses the micro air pump NPK 09DC that KNF company of Germany produces, and this pump is positive/negative-pressure
Dual-purpose air pump: both can be used to evacuation, produces lower pressure environment, can be used to again carry out gas
Compression, it is thus achieved that gases at high pressure.Negative pressure can reach the vacuum of 100mbar, and high pressure is the highest can be obtained
Obtain the output pressure of 7bar, pumping speed 15 liters/min, compact (size
129mm*107mm*65mm), weight light (1.6 kilograms), use direct current supply (24V2.6A),
It is especially suitable for miniaturization instrument and equipment to use.
Four way ball valve uses the 40 series integral gauge ball valves that the big Lip river gram of U.S.'s generation produces, operating pressure
Up to 170bar, it is that 0.68bar, 3.4bar and 6.8bar Airflow amount respectively reaches in pressure drop
25L/min, 67L/min and 120L/min.Valve seat maximum leak rate is 10-4L/min.Use card sleeve pipe
Snap joint, meets that sampling system is portable, the behaviour in service of easy care.
Use aluminium alloy plate to make instrument box, first diaphragm air pump is fixed on instrument by fastening screw
The bottom of box, membrane pump power supply interface, at the side-lower of instrument box, uses standard direct current power supply connector even
Connect；Secondly four way ball valve is fixed on corresponding side plate, by the four of four way ball valve ports respectively with
Membrane pump air inlet, gas outlet, sampling gas cylinder transfer tube are connected with sample source of the gas transfer tube；Finally
Instrument box cover plate is installed, fixes screw thread by the instrument on ball valve and four way ball valve is fixed on upper cover
On plate, and on sampling gas cylinder adapting pipe, Pressure gauge is installed.
First sampling gas cylinder is connected on equipment during work, connects power supply, turn on the power switch, every
Membrane pump is started working: first four way ball valve is placed in direction of bleeding, diaphragm air pump air inlet and sampling gas
Bottle connection, in sampling gas cylinder, original gas is drawn out of, and forms low pressure vacuum environment；When pressure arrives
During diaphragm air pump lower-pressure limit, four way ball valve is placed in inflation direction, diaphragm air pump gas outlet and sampling
Gas cylinder connects, and is filled with gases at high pressure in sampling gas cylinder.Utilize the Pressure gauge prison connected with sampling gas cylinder
Change depending on pressure.Barometric minimum of every time bleeding is 0.1bar, and inflating hyperbar is 7bar, once inflates
It is remaining that-pumping cycle only has the gas less than 1.5%.So inflate-bleed iterative cycles 3 times, then adopt
In sample gas bottle, the ratio of original residual gas will be reduced to below 3ppm, reach negligible level.
After having inflated for the last time, close the valve on sampling gas cylinder, and it removed from sampling apparatus,
Sampling completes.
Claims (3)
1. the miniaturization sample collecting apparatus for gas sample, it is characterised in that: use direct current
The positive/negative-pressure dual-purpose miniature diaphragm air pump of power supply, to the forvacuum of sampling gas cylinder elder generation, refills high pressure gas
Body, realizes the cleaning pretreatment of sampling gas cylinder during evacuation-fill malleation circular treatment；At gas
When body collection capacity determines, by improving the sample gas pressure volume with reduction sampling gas cylinder, increase is adopted
The portability of sample system.
2. the miniaturization sample collecting apparatus for gas sample, it is characterised in that: use four-way
Ball valve carries out the switching between working state of system, it is achieved evacuation and the operating in a key filling high pressure,
Easy to use, it is to avoid maloperation.
3. the miniaturization sample collecting apparatus for gas sample, it is characterised in that: use GB
Inhalator jar and matching interface composition sampling gas cylinder, can fill the gas of 13bar pressure, and structure is reliable,
Interface is consistent, cheap, can need change the most isometric gas cylinder flexibly and grow according to sampling
Phase preserves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610391338.3A CN105954071A (en) | 2016-06-03 | 2016-06-03 | Miniaturized sample collecting device used for gas sampling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610391338.3A CN105954071A (en) | 2016-06-03 | 2016-06-03 | Miniaturized sample collecting device used for gas sampling |
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| CN105954071A true CN105954071A (en) | 2016-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610391338.3A Pending CN105954071A (en) | 2016-06-03 | 2016-06-03 | Miniaturized sample collecting device used for gas sampling |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106956930A (en) * | 2017-04-28 | 2017-07-18 | 湖南三德科技股份有限公司 | Power cabinet for sample pneumatic conveyer system |
| CN108195627A (en) * | 2018-03-08 | 2018-06-22 | 云南电网有限责任公司电力科学研究院 | The hermetically sealed oil taking apparatus and method of a kind of bushing shell for transformer |
| CN108303292A (en) * | 2017-12-04 | 2018-07-20 | 优泰科技（深圳）有限公司 | A kind of clear tank instrument of double pump and control method |
| CN109519700A (en) * | 2019-01-07 | 2019-03-26 | 安庆市佰联无油压缩机有限公司 | Can system is filled with oxygen in a kind of airport |
| CN111957012A (en) * | 2020-09-23 | 2020-11-20 | 周杰 | Body-building hemisphere |
| CN112557130A (en) * | 2021-02-28 | 2021-03-26 | 中国工程物理研究院核物理与化学研究所 | Method for filling gas into gas detector |
| CN113431930A (en) * | 2021-06-30 | 2021-09-24 | 蜂巢能源科技有限公司 | Multi-way valve and collection device with same |
| CN114852534A (en) * | 2022-06-14 | 2022-08-05 | 山东征驰汽车制造有限公司 | Vertical tank of powder tank truck |
| CN117433849A (en) * | 2023-09-05 | 2024-01-23 | 佛山绿色发展创新研究院 | A sampling device and sampling method for hydrogen used in proton exchange membrane fuel cells |
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| CN2052828U (en) * | 1989-03-20 | 1990-02-14 | 武进县小河水利站电器厂 | Air sampling membrane pump |
| CN200986501Y (en) * | 2006-12-19 | 2007-12-05 | 夏自强 | Portable gas vacuum sampling instrument capable of switching flow direction |
| CN101476997A (en) * | 2009-01-14 | 2009-07-08 | 重庆电力科学试验研究院 | Sulfur hexafluoride gas sample collection apparatus |
| CN202533288U (en) * | 2012-03-27 | 2012-11-14 | 青岛众瑞智能仪器有限公司 | Automatic air bag air sampler |
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| US20180045113A1 (en) * | 2016-08-12 | 2018-02-15 | Zhejiang University | Device of high-temperature solar turbine power generation with thermal energy storage |
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2016
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2052828U (en) * | 1989-03-20 | 1990-02-14 | 武进县小河水利站电器厂 | Air sampling membrane pump |
| CN200986501Y (en) * | 2006-12-19 | 2007-12-05 | 夏自强 | Portable gas vacuum sampling instrument capable of switching flow direction |
| CN101476997A (en) * | 2009-01-14 | 2009-07-08 | 重庆电力科学试验研究院 | Sulfur hexafluoride gas sample collection apparatus |
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| CN204694509U (en) * | 2015-04-07 | 2015-10-07 | 中国气象科学研究院 | A kind of halo greenhouse gases flushable type sampling thief |
| US20180045113A1 (en) * | 2016-08-12 | 2018-02-15 | Zhejiang University | Device of high-temperature solar turbine power generation with thermal energy storage |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106956930A (en) * | 2017-04-28 | 2017-07-18 | 湖南三德科技股份有限公司 | Power cabinet for sample pneumatic conveyer system |
| CN108303292A (en) * | 2017-12-04 | 2018-07-20 | 优泰科技（深圳）有限公司 | A kind of clear tank instrument of double pump and control method |
| CN108195627A (en) * | 2018-03-08 | 2018-06-22 | 云南电网有限责任公司电力科学研究院 | The hermetically sealed oil taking apparatus and method of a kind of bushing shell for transformer |
| CN109519700A (en) * | 2019-01-07 | 2019-03-26 | 安庆市佰联无油压缩机有限公司 | Can system is filled with oxygen in a kind of airport |
| CN111957012A (en) * | 2020-09-23 | 2020-11-20 | 周杰 | Body-building hemisphere |
| CN112557130A (en) * | 2021-02-28 | 2021-03-26 | 中国工程物理研究院核物理与化学研究所 | Method for filling gas into gas detector |
| CN113431930A (en) * | 2021-06-30 | 2021-09-24 | 蜂巢能源科技有限公司 | Multi-way valve and collection device with same |
| CN113431930B (en) * | 2021-06-30 | 2023-05-23 | 蜂巢能源科技有限公司 | Multi-way valve and collection device with same |
| CN114852534A (en) * | 2022-06-14 | 2022-08-05 | 山东征驰汽车制造有限公司 | Vertical tank of powder tank truck |
| CN117433849A (en) * | 2023-09-05 | 2024-01-23 | 佛山绿色发展创新研究院 | A sampling device and sampling method for hydrogen used in proton exchange membrane fuel cells |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: No. 1, Bayi Road, Huairou District, Beijing City, Beijing Applicant after: China People's Liberation Army Strategic Support Unit Space Engineering University Address before: No. 1, Bayi Road, Huairou District, Beijing City, Beijing Applicant before: PLA 'S Equipment College |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
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Application publication date: 20160921 |