CN104764632B - Contactless Full-automatic gas keeps sample device - Google Patents
Contactless Full-automatic gas keeps sample device Download PDFInfo
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- CN104764632B CN104764632B CN201510191720.5A CN201510191720A CN104764632B CN 104764632 B CN104764632 B CN 104764632B CN 201510191720 A CN201510191720 A CN 201510191720A CN 104764632 B CN104764632 B CN 104764632B
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Abstract
Keep sample device the invention discloses a kind of contactless Full-automatic gas, including being sequentially provided with sample air valve, evacuating flowmeter and evacuating the sampling pipe of air pump, and some airbags are connected with through sample gas branch pipe on the sampling pipe between sample air valve and evacuation flowmeter, and it is equipped with communicating valve on every sample gas branch pipe；Also include the air pipe line for being sequentially provided with air valve, sample streams gauge and air pump of sampling, and it is connected with some and one-to-one vacuum tank of airbag through evacuating branch pipe on the air pipe line between air valve and sample streams gauge, each airbag is sealed in corresponding vacuum tank, and is equipped with extraction valve on every evacuation branch pipe；Also include the controller electrically connected with each flowmeter, valve and air pump.The present apparatus can not only realize that the automatic of gas accurately keeps sample, improve production efficiency and save cost of labor, and the design of contactless airbag has completely cut off human contact, and production security is improved while being easy to install additional gas-heating apparatus, and ensure that gas whole process is pollution-free, it is lossless.
Description
Technical field
Keep sample device the present invention relates to a kind of contactless Full-automatic gas.
Background technology
It is gas generation and an important link in detection process that gas, which keeps sample, for below standard gas（For example it is public
Take charge of the polytetrafluoroethylene (PTFE) gas that produces at present, with chemical stability, non-stick, lubricity and electrical insulating property, resistance to ag(e)ing and
Radiation resistance plurality of advantages, is typically used as inner lining material, and it needs to carry out detection up to standard before dispatching from the factory）, will extract and store
In case follow-up calibrating, analysis and verification in one or even multiple airbags.
Conventional way, which is relied on, at present manually keeps sample, and not only wastes time and energy, enterprise is undertaken no small cost of labor, and
For exceeded gaseous sample, workman is difficult when control should keep sample, and leaves and takes how many amounts, it is more likely that
Most representational sample gas or do not leave and take can be missed and reach gas flow needed for calibrating, to later research, verification is brought
Inconvenience.And existing Artificial gas keep sample during because workman directly contacts with airbag, misoperation easily causes the gas that keeps sample
The pollution and loss of body, cause the inaccurate of follow-up calibrating and analysis result, do not reach due purpose.
A bit important, adsorbs a cohesive class gas, it needs during conveying and keeping sample for easy in addition
Whole process heating, therefore require to prepare special firing equipment, processing is more bothered, and is not only considerably increased workman's burden, is also increased
The production cost of enterprise.And workman surprisingly contacts hot gas or airbag during keeping sample and easily causes unnecessary peace
Full accident.
The content of the invention
The present invention seeks to：A kind of contactless Full-automatic gas is provided to keep sample device, can not only realize gas from
It is dynamic accurately to keep sample, greatly improve production efficiency and save cost of labor, and airbag use it is contactless design to completely cut off and
The direct contact of workman, improves production security while being easy to install additional gas-heating apparatus, and ensures gas during keeping sample
It is whole pollution-free, it is lossless.
The technical scheme is that：A kind of contactless Full-automatic gas keeps sample device, it is characterised in that including sampling
Pipe, is sequentially provided with sample air valve, evacuates flowmeter and evacuates air pump thereon, and adopting between the sample air valve and evacuation flowmeter
Sample pipe is provided with airbag bonding pad, is connected with some airbags by sample gas branch pipe thereon, and the company of being equipped with every sample gas branch pipe
Port valve；Also include being sequentially provided with air valve, sample streams gauge and sampling air pump on air pipe line, the air pipe line, and in sky
Air pipe line between air valve and sample streams gauge is provided with vacuum tank bonding pad, thereon by evacuate branch pipe be connected with it is some with
The foregoing one-to-one vacuum tank of airbag, each airbag is sealed in corresponding vacuum tank, and every evacuates branch
Extraction valve is equipped with pipe；Also include controller, the sample air valve, evacuate flowmeter, evacuate air pump, each communicating valve, air valve,
Sample streams gauge, sampling air pump and each extraction valve are electrically connected with the controller.
Further, present invention additionally comprises the vacuum tank electric heater unit for being heated to vacuum tank internal gas,
And the vacuum tank electric heater unit is also electrically connected with the controller.Certain form of the invention for vacuum tank electric heater unit is not
It is construed as limiting, it can use any one ripe heater, such as resistive heating device or electric heating pipe type in known technology
Heater etc..
It is more highly preferred to, the heating-up temperature interval of the vacuum tank electric heater unit is 0 ~ 120 DEG C.
Further, present invention additionally comprises the sampling pipe electric heater unit for being heated to sampling tube interior gas,
And the sampling pipe electric heater unit is also electrically connected with the controller.Certain form of the invention for sampling pipe electric heater unit is not
It is construed as limiting, it can use any one ripe heater, such as resistive heating device or electric heating pipe type in known technology
Heater etc..
It is more highly preferred to, low absorbability liner is provided with inside the sampling pipe.The liner that low absorbability is made is used for this
Field routine techniques, is mainly used in preventing gas from adhering on sampling inside pipe wall.
Further, heretofore described airbag is low absorbability airbag.The airbag that low absorbability is made is used for ability
Domain routine techniques, is mainly used in preventing gas from adhering on airbag inwall.
Further, heretofore described airbag bonding pad and the sampling pipe evacuated between flowmeter are provided with sampling leakproof
Valve, and air pipe line between vacuum tank bonding pad and sample streams gauge is provided with Vacuum Balance valve, the sampling anti-drip valve and
Vacuum Balance valve is also all electrically connected with the controller.
Further, present invention additionally comprises the warning device being electrically connected with the controller, if detect sample gas it is long when
Between there is no a flow, MCU will provide signal driving warning device and send alarm.And the form as warning device can be known
The audible alarm unit of what form, or the acoustic-optic alarm that light emission alarm device or both is combined.
Further, heretofore described sampling air pump and evacuation air pump are membrane pump, and the communicating valve, pumping
Valve, sample air valve, air valve, sampling anti-drip valve and Vacuum Balance valve are magnetic valve.
Further, heretofore described controller is PC or MCU.
The real work flow of the present invention is as follows：
Initially：After apparatus system reset or more ventilation bag, MCU controls, which are opened, evacuates air pump and whole communicating valves, evacuates complete
Gas in portion's airbag（The residual gas or waste gas of last action link）, into normal operating conditions；
Normal operating conditions：
1）Sampling pipe is cleaned：MCU detects the signal that keeps sample, and opens sample air valve, starts and evacuates air pump, and draws sample gas is clear
Sampling pipe is washed, after sample gas reaches program predetermined time or flow, sampling pipe cleaning is finished, and is closed and is evacuated air pump and sample
Air valve；
2）Airbag is cleaned：MCU sends control signal and opens sample air valve, Vacuum Balance valve and start sampling air pump, and opens
One of which communicating valve and extraction valve（The opening sequence of communicating valve and pumping valve group is generally determined along sampling pipe gas flow）,
Predetermined is extracted out of vacuum tank by the way that sample streams gauge is quantitative（Such as 300ml）Gas, suction etc. in corresponding airbag
The sample gas of amount, closes sampling air pump, communicating valve, extraction valve, Vacuum Balance valve and sample air valve immediately；Start and evacuate air pump,
And it is again turned on the communicating valve just closed（Air valve and the extraction valve just closed are opened simultaneously, with air pressure in Equilibrium vacuum case）,
By evacuating, flowmeter is quantitative to extract the predetermined just injected out of described airbag（Such as 300ml）Gas, Ran Houguan
Evacuation air pump and communicating valve, air valve and extraction valve are closed, an airbag cleaning process is completed；
Above-mentioned steps 2 according to actual needs）It can perform repeatedly repeatedly；
3）Gas keeps sample：Open sample air valve, Vacuum Balance valve and start sampling air pump, and open step 2）In completed clear
The communicating valve and extraction valve corresponding to airbag washed, pass through the quantitative sample gas that x ml are extracted out of vacuum tank of sample streams gauge
（User can set x sizes values according to airbag capacity）, air pressure declines in vacuum tank, sucks the sample of equivalent in airbag therewith
Gas xml, is then shut off sampling air pump and corresponding communicating valve, extraction valve, Vacuum Balance valve and sample air valve, and completion is once stayed
Sample；It is noted that gas will ensure that sampling anti-drip valve is closed during keeping sample, prevent sample gas from the evacuation of sampling pipe end
Run away in air pump.
4）When keeping sample next time, signal arrives, and MCU controls are switched to next airbag and corresponding communicating valve and taken out
Air valve, and be repeated in performing step 1）Sampling pipe cleaning, step 2）Airbag cleaning and step 3）Gas keep sample mistake entirely
Journey, by that analogy, the present invention may replace the operation that keeps sample for being accomplished manually multiple airbags.If detecting sample gas for a long time not having
There is flow, MCU will provide signal driving warning device and send alarm.
And in whole gas sampling process, the electric heater unit in signal driving vacuum tank and sampling pipe can be transmitted in MCU
Sample gas is implemented to heat, prevents a class special gas from bonding.
It may be noted that the above-mentioned gas of the present invention keep sample, step is set by MCU and controls to perform, and MCU program is set
Fixed and its between flowmeter and each pump, valve connection control technology is routine techniques, and the present invention is not described further to this.
It is an advantage of the invention that：
The instrument 1. this contactless Full-automatic gas that the present invention is provided keeps sample, can replace artificial realization full-automation
Gas keeps sample operation, greatly improves production efficiency, saves cost of labor, and can eliminate and lost present in artificial operation
By mistake, it is ensured that gas is whole pollution-free during keeping sample, lossless, the accuracy of subsequent gases sample calibrating analysis is improved.
The instrument 2. this contactless Full-automatic gas that the present invention is provided keeps sample, because its airbag is designed to noncontact form
（Vacuum tank is set up in outside）, completely cut off airbag in operating process and directly contacted with workman, and be easy in prioritization scheme install gas additional
Body heater substantially increases the applicability and production security of instrument to tackle the special gas that adhesiveness is high, goes forward side by side one
Step contributes to gas whole process during ensuring to keep sample pollution-free, lossless.
The instrument 3. this contactless Full-automatic gas that the present invention is provided keeps sample, it can be before gas keeps sample to airbag
It is cleaned multiple times, it is ensured that the purity that gas keeps sample, eliminates the interference of residual gas, is further improved the calibrating of subsequent gases sample and divide
The accuracy of analysis.
The instrument 4. this contactless Full-automatic gas that the present invention is provided keeps sample, the overall connection using pump, valve and pipeline
Design, simple in construction, closure is good, not by external interference, and without manual intervention, automaticity is high, and job stability
It is good.
The instrument 5. this contactless Full-automatic gas that the present invention is provided keeps sample, is designed with warning device, can be in detection
To sample gas for a long time without flow on the premise of send alarm, greatly improve production security.
Brief description of the drawings
Below in conjunction with the accompanying drawings and embodiment the invention will be further described：
Fig. 1 is structural representation of the invention.
Wherein：1st, communicating valve；2nd, extraction valve；3rd, airbag；4th, vacuum tank；5th, sample air valve；6th, air valve；7th, sampling pipe；8、
Air pipe line；9th, flowmeter is evacuated；10th, sample streams gauge；11st, sampling air pump；12nd, air pump is evacuated；13rd, controller；14th, sample gas
Branch pipe；15th, branch pipe is evacuated；16th, sampling anti-drip valve；17th, Vacuum Balance valve.
Embodiment
Embodiment：Contactless Full-automatic gas of the invention is shown with reference to Fig. 1 to keep sample a kind of specific embodiment party of device
Formula, it has the sampling pipe 7 and air pipe line 8 of parallel arrangement, wherein：
Sample air valve 5 is sequentially provided with the sampling pipe 7, flowmeter 9 is evacuated and evacuates air pump 12, and the sample air valve 5
And the sampling pipe 7 evacuated between flowmeter 9 is provided with airbag bonding pad, is connected with some airbags 3 by sample gas branch pipe 14 thereon,
And it is equipped with communicating valve 1 on every sample gas branch pipe 14.And air valve 6, sample streams gauge 10 are sequentially provided with the air pipe line 8
With sampling air pump 11, and vacuum tank bonding pad is provided with air pipe line 8 between air valve 6 and sample streams gauge 10, thereon
Some and one-to-one vacuum tank 4 of foregoing airbag 3 is connected with by evacuating branch pipe 15, each airbag 3, which is sealed, to be located at
In corresponding vacuum tank 4, and extraction valve 2 is equipped with every evacuation branch pipe 15.Airbag bonding pad described in the present embodiment and
Evacuate and sampling anti-drip valve 16 is additionally provided with the sampling pipe 7 between flowmeter 9, and between vacuum tank bonding pad and sample streams gauge 10
Air pipe line 8 on be additionally provided with Vacuum Balance valve 17.
Controller 13 is additionally provided with the present embodiment, the controller 13 uses MCU, the sample air valve 5, evacuates flowmeter 9, take out
Air pump 12, each communicating valve 1, air valve 6, sample streams gauge 10, sampling air pump 11 and each extraction valve 2, and sampling anti-drip valve
16 and Vacuum Balance valve 17 electrically connected with the controller 13.And it is additionally provided with and is electrically connected with the controller 13 in the present embodiment
The warning device connect（It is not drawn into figure）, warning device is specially buzzer.
Vacuum tank electric heater unit is provided with inside vacuum tank 4 described in the present embodiment（It is not drawn into）, in vacuum tank
Portion's gas is heated, and the vacuum tank electric heater unit is also electrically connected with controller 13.The vacuum tank electric heater unit
Heating-up temperature interval be 0 ~ 120 DEG C.The concrete form of vacuum tank electric heater unit is to be placed in vacuum tank in the present embodiment
Electric heating tube.
Sampling pipe electric heater unit is provided with inside sampling pipe 7 described in the present embodiment（It is not drawn into）, in sampling pipe 7
Portion's gas is heated, and the sampling pipe electric heater unit is also electrically connected with controller 13.Sampling pipe electricity adds in the present embodiment
The concrete form of thermal is the electric heating inner bladder being placed in sampling pipe.
The inside of sampling pipe 7 described in the present embodiment is provided with low absorbability liner simultaneously, is made up, prevents of low absorbability material
Gas is sticked on tube wall.And the airbag 3 is low absorbability airbag, prevent gas from sticking on airbag inwall.
Described in the present embodiment sample air pump 11 and evacuate air pump 12 be membrane pump, and the communicating valve 1, extraction valve 2,
Sample air valve 5, air valve 6, sampling anti-drip valve 16 and Vacuum Balance valve 17 are magnetic valve.
The real work flow of the present embodiment is as follows：
Initially：After apparatus system reset or more ventilation bag, MCU controls, which are opened, evacuates air pump 12 and whole communicating valves 1, evacuates
Gas in whole airbags 3（The residual gas or waste gas of last action link）, into normal operating conditions；
Normal operating conditions：
1）Sampling pipe is cleaned：MCU detects the signal that keeps sample, and opens sample air valve 5, starts and evacuates air pump 12, extracts sample gas
Body cleans sampling pipe 7, after sample gas reaches program predetermined time or flow, and the cleaning of sampling pipe 7 is finished, and air is taken out in closing
Pump 12 and sample air valve 5；
2）Airbag is cleaned：MCU sends control signal and opens sample air valve 5, Vacuum Balance valve 17 and start sampling air pump 11, and
Open one of which communicating valve 1 and extraction valve 2（2 groups of communicating valve 1 and extraction valve are generally determined along the gas flow of sampling pipe 7
Opening sequence）, predetermined is extracted out of vacuum tank 4 by the way that sample streams gauge 10 is quantitative（Such as 300ml）Gas, accordingly
The sample gas of suction equivalent in airbag 3, closes sampling air pump 11, communicating valve 1, extraction valve 2, Vacuum Balance valve 17 and sample immediately
Air valve 5；Start and evacuate air pump 12, and be again turned on the communicating valve 1 just closed（Air valve 6 and the pumping just closed are opened simultaneously
Valve 2, with air pressure in Equilibrium vacuum case 4）, by evacuating, flowmeter 9 is quantitative to extract the predetermined body just injected out of described airbag 3
Product（Such as 300ml）Gas, be then shut off evacuating air pump 12 and communicating valve 1, air valve 6 and extraction valve 2, complete an airbag
3 cleaning processes；
Above-mentioned steps 2 according to actual needs）It can perform repeatedly repeatedly；
3）Gas keeps sample：Open sample air valve 5, Vacuum Balance valve 17 and start sampling air pump 11, and open step 2）In
The communicating valve 1 and extraction valve 2 corresponding to the airbag 3 of cleaning are completed, x is extracted out of vacuum tank 4 by the way that sample streams gauge 10 is quantitative
Ml sample gas（User can set x sizes values according to the capacity of airbag 3）, air pressure declines in vacuum tank 4, in airbag 3 with
Suction equivalent sample gas xml, be then shut off sampling air pump 11 and corresponding communicating valve 1, extraction valve 2, Vacuum Balance valve
17 and sample air valve 5, completion once keeps sample；It is noted that gas will ensure that sampling anti-drip valve 16 is closed during keeping sample, sample is prevented
Product gas is run away out of the end of sampling pipe 7 evacuation air pump 12.
4）When keeping sample next time, signal arrives, and MCU controls are switched to next airbag 3 and the He of corresponding communicating valve 1
Extraction valve 2, and be repeated in performing step 1）Sampling pipe cleaning, step 2）Airbag cleaning and step 3）Gas keep sample entirely
Process, by that analogy, the present invention may replace the operation that keeps sample for being accomplished manually multiple airbags 3.If detect sample gas it is long when
Between there is no a flow, MCU will provide signal driving warning device and send alarm.
And in whole gas sampling process, the electric heater unit in signal driving vacuum tank and sampling pipe can be transmitted in MCU
Sample gas is implemented to heat, prevents a class special gas from bonding.
It may be noted that the above-mentioned gas of the present embodiment keep sample, step sets by MCU and controls to perform, and MCU program
Set and its connection control technology between flowmeter and each pump, valve is routine techniques, the present embodiment is not described further to this.
Certainly the above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow be familiar with technique
People can understand present disclosure and implement according to this, it is not intended to limit the scope of the present invention.It is all according to this hair
The modification that the Spirit Essence of bright main technical schemes is done, should all be included within the scope of the present invention.
Claims (9)
- The device 1. a kind of contactless Full-automatic gas keeps sample, it is characterised in that including sampling pipe (7), sample gas is sequentially provided with thereon Sampling between valve (5), evacuation flowmeter (9) and evacuation air pump (12), and the sample air valve (5) and evacuation flowmeter (9) Manage (7) and be provided with airbag bonding pad, some airbags (3) are connected with by sample gas branch pipe (14) thereon, and every sample gas branch pipe (14) communicating valve (1) is equipped with；Also include being sequentially provided with air valve (6) on air pipe line (8), the air pipe line (8), adopt Sample flowmeter (10) and sampling air pump (11), and set on air pipe line (8) between air valve (6) and sample streams gauge (10) There is vacuum tank bonding pad, be connected with the one-to-one vacuum tank of some and foregoing airbag (3) by evacuating branch pipe (15) thereon (4), each airbag (3) is sealed in the corresponding vacuum tank (4), and every evacuates to be equipped with branch pipe (15) and takes out Air valve (2)；The airbag bonding pad and the sampling pipe (7) evacuated between flowmeter (9) are provided with sampling anti-drip valve (16), and true Air pipe line (8) between empty van bonding pad and sample streams gauge (10) is provided with Vacuum Balance valve (17), in addition to controller (13), the sample air valve (5), evacuation flowmeter (9), evacuation air pump (12), each communicating valve (1), air valve (6), sampling flow Count (10), sampling air pump (11), each extraction valve (2), sampling anti-drip valve (16) and Vacuum Balance valve (17) with the controller (13) electrically connect.
- The device 2. contactless Full-automatic gas according to claim 1 keeps sample, it is characterised in that also including for true The vacuum tank electric heater unit that empty van (4) internal gas is heated, and the vacuum tank electric heater unit also with controller (13) electrically connect.
- The device 3. contactless Full-automatic gas according to claim 2 keeps sample, it is characterised in that the vacuum tank electricity adds The heating-up temperature interval of thermal is 0~120 DEG C.
- The device 4. contactless Full-automatic gas according to claim 1 keeps sample, it is characterised in that also including for adopting The sampling pipe electric heater unit that sample pipe (7) internal gas is heated, and the sampling pipe electric heater unit also with controller (13) electrically connect.
- The device 5. contactless Full-automatic gas according to claim 4 keeps sample, it is characterised in that in the sampling pipe (7) Portion is provided with low absorbability liner.
- The device 6. contactless Full-automatic gas according to claim 1 keeps sample, it is characterised in that the airbag (3) is low Adsorptivity airbag.
- The device 7. contactless Full-automatic gas according to claim 1 keeps sample, it is characterised in that also include and controller (13) warning device of electrical connection.
- The device 8. contactless Full-automatic gas according to claim 1 keeps sample, it is characterised in that the sampling air pump (11) and to evacuate air pump (12) be membrane pump, the communicating valve (1), extraction valve (2), sample air valve (5), air valve (6), adopt Sample anti-drip valve (16) and Vacuum Balance valve (17) are magnetic valve.
- The device 9. the contactless Full-automatic gas according to claim 1 or 2 or 4 or 7 keeps sample, it is characterised in that the control Device (13) processed is PC or MCU.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510191720.5A CN104764632B (en) | 2015-04-22 | 2015-04-22 | Contactless Full-automatic gas keeps sample device |
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|---|---|---|---|
| CN201510191720.5A CN104764632B (en) | 2015-04-22 | 2015-04-22 | Contactless Full-automatic gas keeps sample device |
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| CN104764632A CN104764632A (en) | 2015-07-08 |
| CN104764632B true CN104764632B (en) | 2017-10-03 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510538A (en) * | 2015-12-31 | 2016-04-20 | 聚光科技(杭州)股份有限公司 | Remote quality control device and method of gas monitoring system |
| CN106442031A (en) * | 2016-10-13 | 2017-02-22 | 北京市环境保护监测中心 | Automatic sampling device for malodorous gas |
| CN108801716A (en) * | 2018-05-23 | 2018-11-13 | 上海北裕分析仪器股份有限公司 | A kind of gas producing device and method of acquisition parallel gas |
| CN110095325A (en) * | 2019-05-28 | 2019-08-06 | 山东瑞泽检测评价技术服务有限公司 | A kind of miniature small traffic timing gas sampler of airbag |
| US11371914B2 (en) | 2019-09-11 | 2022-06-28 | Saudi Arabian Oil Company | Automated hydrogen sulfide sampler |
| CN110926875A (en) * | 2019-11-29 | 2020-03-27 | 辽宁工程技术大学 | Coal mine goaf bundle pipe gas collecting and storing device and using method thereof |
| CN112798360A (en) * | 2021-02-04 | 2021-05-14 | 王冀 | Sampler for vacuum gas container |
| CN114577555A (en) * | 2022-03-29 | 2022-06-03 | 江苏新锐环境监测有限公司 | Gas sampling method by air bag method |
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| JP3502532B2 (en) * | 1997-10-04 | 2004-03-02 | 株式会社堀場製作所 | Constant volume sampling device and gas analysis method using the same |
| EP0959339A3 (en) * | 1998-05-12 | 2002-08-21 | Honda Giken Kogyo Kabushiki Kaisha | Exhaust gas sampling apparatus |
| CN200986501Y (en) * | 2006-12-19 | 2007-12-05 | 夏自强 | Portable gas vacuum sampling instrument capable of switching flow direction |
| CN201107223Y (en) * | 2007-09-19 | 2008-08-27 | 广东省电力工业局试验研究所 | SF6 gas sampler |
| CN101620038B (en) * | 2009-07-21 | 2012-05-16 | 清华大学 | Multi-functional gas sampling system and gas sampling method |
| 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 |
| CN104020019A (en) * | 2014-06-05 | 2014-09-03 | 上海大学 | Portable automatic collecting device of volatile organic compounds in atmosphere |
| CN204101337U (en) * | 2014-08-15 | 2015-01-14 | 奇鼎科技股份有限公司 | Automatic gas gathers apparatus for temporary storage |
| CN204556343U (en) * | 2015-04-22 | 2015-08-12 | 苏州聚阳环保科技股份有限公司 | Contactless Full-automatic gas keeps sample device |
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