CN105805544A - Standard gas preparation and device used for verification of SF6 analyzing instrument - Google Patents

Standard gas preparation and device used for verification of SF6 analyzing instrument Download PDF

Info

Publication number
CN105805544A
CN105805544A CN201610319482.6A CN201610319482A CN105805544A CN 105805544 A CN105805544 A CN 105805544A CN 201610319482 A CN201610319482 A CN 201610319482A CN 105805544 A CN105805544 A CN 105805544A
Authority
CN
China
Prior art keywords
gas
bottle
source
standard
ball valve
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.)
Pending
Application number
CN201610319482.6A
Other languages
Chinese (zh)
Inventor
赵跃
祁炯
苏镇西
袁小芳
宋玉梅
王海飞
薛冰
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.)
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Anhui Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Anhui Electric Power Co Ltd
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 State Grid Corp of China SGCC, Electric Power Research Institute of State Grid Anhui Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201610319482.6A priority Critical patent/CN105805544A/en
Publication of CN105805544A publication Critical patent/CN105805544A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/22Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
    • B01D53/228Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion characterised by specific membranes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00Details of vessels or of the filling or discharging of vessels
    • F17C13/02Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00Details of vessels or of the filling or discharging of vessels
    • F17C13/04Arrangement or mounting of valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C5/00Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/06Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2253/00Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10Inorganic adsorbents
    • B01D2253/106Silica or silicates
    • B01D2253/108Zeolites
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2253/00Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10Inorganic adsorbents
    • B01D2253/116Molecular sieves other than zeolites
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/30Sulfur compounds
    • B01D2257/302Sulfur oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/30Sulfur compounds
    • B01D2257/304Hydrogen sulfide
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/30Sulfur compounds
    • B01D2257/306Organic sulfur compounds, e.g. mercaptans
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00Handled fluid, in particular type of fluid
    • F17C2221/01Pure fluids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107Single phase
    • F17C2223/0123Single phase gaseous, e.g. CNG, GNC
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/04Methods for emptying or filling
    • F17C2227/045Methods for emptying or filling by vacuum
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04Indicating or measuring of parameters as input values
    • F17C2250/0404Parameters indicated or measured
    • F17C2250/043Pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00Purposes of gas storage and gas handling
    • F17C2260/04Reducing risks and environmental impact
    • F17C2260/044Avoiding pollution or contamination
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00Effects achieved by gas storage or gas handling
    • F17C2265/01Purifying the fluid
    • F17C2265/012Purifying the fluid by filtering

Abstract

The invention provides a standard gas preparation and device used for verification of an SF6 analyzing instrument. The method includes the steps that 1), an SF6 gas source is closed, a gas circuit communicating with a standard gas bottle behind the SF6 gas source is vacuumized, and it is measured that the pressure value of the standard gas bottle is P1 after vacuumizing; 2), the SF6 gas source is opened, the standard gas bottle is inflated with SF6 gas through the gas circuit, and it is measured that the pressure value of the standard gas bottle is Q1 after gas inflation; and 3), the first step and the second step are repeated till Pphi is smaller than 0.001 Pa, gas in the standard gas bottle is prepared standard gas, and Pphi is obtained through the formula (please see the formula in the description). According to the device, a preparation main gas circuit in a standards gas filling system comprises a first electromagnetic valve, a first buggering tank, a first electromagnetic proportion adjusting valve, a first diaphragm compressor and a first pressure sensor which are sequentially connected between the gas source and the standard gas bottle in sequence; and a gas inlet of a vacuum pump is connected with a gas inlet and a gas outlet of the first diaphragm compressor through a first ball valve and a second ball valve. By means the device, a micro amount of air in the standard gas bottle can be effectively removed, components prone to oxidization are prevented from being oxidized, and the quality of the standards gas is guaranteed.

Description

For SF6The gas compound method of analyser verification and device
Technical field
The present invention provides a kind of for SF6The gas compound method of analyser verification and device, belong to gas fill and verification tail gas clean-up technical field.
Background technology
Along with voltage levels SF6A large amount of installations of electrical equipment, to SF in electrical equipment6Gaseous mass supervision and management it is also proposed requirements at the higher level, currently mainly adopts SF6Gas decomposition product instrument, SF6Gas humidity instrument and SF6SF implemented by the instruments such as gas purity instrument6The quality surveillance work of electrical equipment.For guaranteeing apparatus measures accuracy, needing the above-mentioned instrument of periodic check, existing verification mode adopts distributing instrument to make gas to SF6Analyser verifies, and which exists two problems in practice: one is that after verification, the tail gas of generation is without purified treatment, and directly to airborne release after by the road, verification tail gas is mainly composed of SF6Gas, also contains H2S、SO2、SOF2、SO2F2Deng toxic gas, wherein SF6Gas is as greenhouse gases, and surrounding is directly brought bigger harm to airborne release by it, and its toxic gas contained will also result in serious human injury after being sucked by people, it is therefore desirable to a kind of miniature tail gas clean-up reclaims verification tail gas technology;Two is that distributing instrument volume is relatively big, and needs to use together with multiple steel cylinders, can only at labs SF6Analyser verifying work, SF in transformer station6The verifying work of analyser mainly through concentration known gas steel cylinder to SF6Analyser verifies, and first to steel cylinder evacuation during this gas steel cylinder fill, then injects gas, still remains partial air because of evacuation, causes that in gas, oxidizable component reacts after entering steel cylinder, it is therefore desirable to a kind of suitable in SF6The distribution Canning Technique of the gas that analyser verification uses.
Summary of the invention
It is an object of the invention to provide a kind of can overcome drawbacks described above, simultaneously meet gas fill and verification tail gas clean-up for SF6The gas compound method of analyser verification and device.Its technical scheme is:
A kind of for SF6The gas compound method of analyser verification, it is characterised in that adopt following steps: 1) close SF6Source of the gas, to SF6Connecting the gas circuit evacuation of gas bottle after source of the gas, after recording evacuation, the force value of gas bottle is P1;2) SF is opened6Source of the gas, fills SF by gas circuit to gas bottle6Gas, after recording inflation, the force value of gas bottle is Q1;3) step 1 is repeated) and step 2), untilLess than 0.001Pa, the gas in gas bottle is the gas of preparation,By formulaObtaining, wherein n is evacuation number of times, n > 1, PnFor the pressure recorded after n-th gas bottle evacuation, Qn-1The pressure recorded after inflating for gas bottle n-th,For air pressure remaining in steel cylinder after gas bottle n-th evacuation.
A kind of realization is used for SF6The device of the gas compound method of analyser verification, it is characterized in that: include source of the gas, gas bottle, prepare main gas circuit, vacuum pump, the first ball valve and the second ball valve, wherein preparing the first electromagnetic valve, the first surge tank, the first electromagnetic proportion regulating, the first diaphragm type compressor and the first pressure transducer that main gas circuit includes being sequentially connected with between source of the gas and gas bottle, the air inlet of vacuum pump connects the air inlet of the first diaphragm type compressor, the main gas circuit of preparation after the second ball valve connects the first pressure transducer through the first ball valve respectively;
Its operation principle is: when needs fill gas, first opens the first ball valve and the second ball valve and to gas bottle and prepares main gas circuit evacuation, then closes the first ball valve and the second ball valve, source of the gas is changed into SF6Gas, injects SF in bulking system6Gas, main gas circuit air is prepared in dilution, is then shut off the connection of the first surge tank and source of the gas, opens the first ball valve and the second ball valve evacuation, is SF the air displacement prepared in main gas circuit6Gas, calculates residual air force value according to model 1When Time, then in gas circuit, inject SF6Gas, so several times, untilWhole process is by the configuration of gas in the first electromagnetic proportion regulating and first, second ball valve control realization gas bottle.
WhereinFor residual air pressure, n is evacuation number of times, PnFor the vacuum measured, Q every timen-1For the storage pressure value measured every time.For the pressure recorded after steel cylinder first time inflation, P1The pressure very recorded afterwards is taken out for first time steel cylinder.
When verification tail gas is carried out Recovery Purifying by needs, source of the gas is changed into verification tail gas, molecular sieve filter and polymeric membrane filter fits verification tail gas is carried out purified treatment.
The present invention compared with prior art, has an advantage in that:
1, low pressure SF is adopted when preparing gas6Gas filling technology, first first injects SF in gas bulking system6Gas, diluent air, then evacuation, air displacement, through repeatedly repeatable operation, can effectively remove micro-air in steel cylinder, and then effectively reduce the probability that in gas pouring process, oxidizable component is oxidized, it is ensured that gas quality.
2, this device volume is little, easy to carry, meets actual demand.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
In figure: 1, source of the gas 2, gas bottle 3, vacuum pump the 4, first ball valve the 5, second ball valve the 6, first electromagnetic valve the 7, first surge tank the 8, first electromagnetic proportion regulating the 9, first diaphragm type compressor the 10, first pressure transducer 11, returnable bottle the 12, second electromagnetic valve the 13, second surge tank the 14, second electromagnetic proportion regulating the 15, second diaphragm type compressor the 16, second pressure transducer the 17, the 3rd electromagnetic valve 18, molecular sieve filter 19, polymeric membrane filter
Detailed description of the invention
By the following examples present disclosure is illustrated in further detail.In the embodiment shown in fig. 1: preparing the first electromagnetic valve the 6, first surge tank the 7, first electromagnetic proportion regulating the 8, first diaphragm type compressor 9 and the first pressure transducer 10 that main gas circuit includes being sequentially connected with between source of the gas 1 and gas bottle 2 in gas bulking system, the air inlet of vacuum pump 3 connects the air inlet of the first diaphragm type compressor 9, the main gas circuit of preparation after the second ball valve 5 connects the first pressure transducer 10 through the first ball valve 4 respectively.
Gas filling process: 1) close SF6Source of the gas, to SF6Connecting the gas circuit evacuation of gas bottle 2 after source of the gas, after recording evacuation, the force value of gas bottle is P1, it is specially 1000Pa;2) SF is opened6Source of the gas, fills SF by gas circuit to gas bottle6Gas, after recording inflation, the force value of gas bottle is Q1, it is specially 1 × 105Pa;3) step 1 is repeated) and step 2) 4 times, untilLess than 0.001Pa, the gas in gas bottle is the gas of preparation,By formulaObtaining, wherein n is evacuation number of times, and n is 4 times, PnFor the pressure recorded after n-th gas bottle evacuation, QnThe pressure recorded after inflating for gas bottle n-th,For air pressure remaining in steel cylinder after gas bottle n-th evacuation.

Claims (2)

1. one kind is used for SF6The gas packaging process of analyser verification, it is characterised in that adopt following steps: 1) close SF6Source of the gas, to SF6Connecting the gas circuit evacuation of gas bottle after source of the gas, after recording evacuation, the force value of gas bottle is P1;2) SF is opened6Source of the gas, fills SF by gas circuit to gas bottle6Gas, after recording inflation, the force value of gas bottle is Q1;3) step 1 is repeated) and step 2), untilLess than 0.001Pa, the gas in gas bottle is the gas of preparation,By formulaObtaining, wherein n is evacuation number of times, n > 1, PnFor the pressure recorded after n-th gas bottle evacuation, Qn-1The pressure recorded after inflating for gas bottle n-th,For air pressure remaining in steel cylinder after gas bottle n-th evacuation.
2. one kind realizes for SF6The device of the gas packaging process of analyser verification, it is characterized in that: include source of the gas (1), gas bottle (2), prepare main gas circuit, vacuum pump (3), first ball valve (4) and the second ball valve (5), wherein prepare the first electromagnetic valve (6) that main gas circuit includes being sequentially connected with between source of the gas (1) and gas bottle (2), first surge tank (7), first electromagnetic proportion regulating (8), first diaphragm type compressor (9) and the first pressure transducer (10), the air inlet of vacuum pump (3) connects the air inlet of the first diaphragm type compressor (9) respectively through the first ball valve (4), the main gas circuit of preparation after the second ball valve (5) connects the first pressure transducer (10).
CN201610319482.6A 2016-05-13 2016-05-13 Standard gas preparation and device used for verification of SF6 analyzing instrument Pending CN105805544A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610319482.6A CN105805544A (en) 2016-05-13 2016-05-13 Standard gas preparation and device used for verification of SF6 analyzing instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610319482.6A CN105805544A (en) 2016-05-13 2016-05-13 Standard gas preparation and device used for verification of SF6 analyzing instrument

Publications (1)

Publication Number Publication Date
CN105805544A true CN105805544A (en) 2016-07-27

Family

ID=56456869

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610319482.6A Pending CN105805544A (en) 2016-05-13 2016-05-13 Standard gas preparation and device used for verification of SF6 analyzing instrument

Country Status (1)

Country Link
CN (1) CN105805544A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106439481A (en) * 2016-08-25 2017-02-22 杭州艾尔柯制冷剂科技有限公司 Charging technology for refrigerant gas cylinders less than 1 liter
CN109915728A (en) * 2018-12-24 2019-06-21 国网浙江龙游县供电有限公司 A kind of SF6Full-automatic vacuum-pumping inflates cart
CN111678036A (en) * 2020-05-25 2020-09-18 国网黑龙江省电力有限公司电力科学研究院 Sulfur hexafluoride tail gas recovery device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86207843U (en) * 1986-10-11 1987-09-02 机械工业部第七设计研究院 Gasfilling and recollecting apparatus
CN203929721U (en) * 2014-06-27 2014-11-05 国家电网公司 The simple and easy device for formulating of a kind of transformer oil chromatographic test standard gas
US20150153003A1 (en) * 2013-09-17 2015-06-04 J. W. Randolph Miller Nitric oxide cylinder filling apparatus and method
CN204768546U (en) * 2015-06-25 2015-11-18 中国船舶重工集团公司第七一八研究所 Automatic distributing device of electron level mist
CN205067447U (en) * 2015-09-11 2016-03-02 中国气象科学研究院 Use carbon dioxide mark gas preparation system of nature atmosphere as spirit
CN205193613U (en) * 2015-12-10 2016-04-27 北京市华云分析仪器研究所有限公司 Quick distributing device based on solenoid valve
CN105546333A (en) * 2016-01-22 2016-05-04 池州森大轻工制品有限公司 Filling system for high-purity gas

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86207843U (en) * 1986-10-11 1987-09-02 机械工业部第七设计研究院 Gasfilling and recollecting apparatus
US20150153003A1 (en) * 2013-09-17 2015-06-04 J. W. Randolph Miller Nitric oxide cylinder filling apparatus and method
CN203929721U (en) * 2014-06-27 2014-11-05 国家电网公司 The simple and easy device for formulating of a kind of transformer oil chromatographic test standard gas
CN204768546U (en) * 2015-06-25 2015-11-18 中国船舶重工集团公司第七一八研究所 Automatic distributing device of electron level mist
CN205067447U (en) * 2015-09-11 2016-03-02 中国气象科学研究院 Use carbon dioxide mark gas preparation system of nature atmosphere as spirit
CN205193613U (en) * 2015-12-10 2016-04-27 北京市华云分析仪器研究所有限公司 Quick distributing device based on solenoid valve
CN105546333A (en) * 2016-01-22 2016-05-04 池州森大轻工制品有限公司 Filling system for high-purity gas

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106439481A (en) * 2016-08-25 2017-02-22 杭州艾尔柯制冷剂科技有限公司 Charging technology for refrigerant gas cylinders less than 1 liter
CN109915728A (en) * 2018-12-24 2019-06-21 国网浙江龙游县供电有限公司 A kind of SF6Full-automatic vacuum-pumping inflates cart
CN111678036A (en) * 2020-05-25 2020-09-18 国网黑龙江省电力有限公司电力科学研究院 Sulfur hexafluoride tail gas recovery device

Similar Documents

Publication Publication Date Title
CN105805544A (en) Standard gas preparation and device used for verification of SF6 analyzing instrument
CN104888635A (en) Device and method for compounding multiple cylinders of mixed gas
CN106567991A (en) Automatic portable oxygen tank filling production line
CN203929721U (en) The simple and easy device for formulating of a kind of transformer oil chromatographic test standard gas
CN109506844A (en) A kind of ring network cabinet SF6 gas tank helium check system and method
CN204752206U (en) Gaseous online purifier of electric power SF6 circuit breaker SF6
CN107726043B (en) Mixed gas transformation method of 110kV sulfur hexafluoride gas insulation current transformer
CN205746018U (en) SF6analyser verification gas compressed filling and verification exhaust gas cleaner
CN104502039A (en) Gas tightness detecting method for fuel gas meter
CN204613773U (en) Sealed packet vanning pressure control device
CN204008527U (en) A kind of rare gas product micro-moisture analysis apparatus
CN201014183Y (en) Computer control high precision CO2 pour-in equipment
CN206948778U (en) Utilize the communication equipment of atmospheric pressure compensating technology
CN212030839U (en) Hydrogen permeability measuring device for hydrogen storage cylinder
CN206515022U (en) Mask entirety negative pressure air-tightness on-line measuring device
CN206437868U (en) A kind of hospital's oxygen-enriched air purifies the device of medical oxygen
CN104743523B (en) A kind of gas cleaning plant and method for gas purification thereof
CN108278190A (en) One machine realizes pressurization and inhales the method and device of vacuum
CN201293743Y (en) Pumping and filtering device
CN203903954U (en) Improved small needle filling machine capable of reducing defect rate of shards
CN111307382A (en) Hydrogen permeability measuring device and method for hydrogen storage cylinder
CN205167349U (en) IC encapsulation mold machine construct with take out vacuum structure
CN102921301B (en) Method for preparing medical oxygen from mixed gases containing oxygen air components through multi-cycle membrane separation
CN112516746A (en) C4F7N/CO2Mixed gas recovery and purification device
CN110702332B (en) Method for evaluating vacuum packaging performance of MEMS

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20160727

WD01 Invention patent application deemed withdrawn after publication