CN207502489U - A kind of device for distributing standard gas for the experiment of sulfur hexafluoride decomposer pre-concentration - Google Patents

A kind of device for distributing standard gas for the experiment of sulfur hexafluoride decomposer pre-concentration Download PDF

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Publication number
CN207502489U
CN207502489U CN201721507496.7U CN201721507496U CN207502489U CN 207502489 U CN207502489 U CN 207502489U CN 201721507496 U CN201721507496 U CN 201721507496U CN 207502489 U CN207502489 U CN 207502489U
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needle valve
concentration
distributing
gas
connecting tube
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罗宗昌
刘陈瑶
韩方源
朱立平
张洁明
唐彬
张龙飞
梁沁沁
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Electric Power Research Institute of Guangxi Power Grid Co Ltd
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Electric Power Research Institute of Guangxi Power Grid Co Ltd
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Abstract

A kind of device for distributing standard gas for the experiment of sulfur hexafluoride decomposer pre-concentration, including distributing instrument, sampling bottle, vacuum pump, gas concentration unit, pressure gauge, flowmeter.First needle valve used in the utility model to the 5th needle valve is all the size reasonable of through-type needle valve and air inlet/outlet diameter, and the flow velocity that can make gaseous sample is gentle, easily controllable;Sampling bottle used is Soviet Union's agate tank by Passivation Treatment, and each gas component can be made to keep stablizing;Vacuum pump used is import dual oil seal sliding vane rotary vacuum pump, facilitates the flow velocity of control gaseous sample;Gases used enrichment facility uses 7200 air pre-concentration instrument of U.S. ENTECH, and sample introduction effect is good;The air distributing device can be suitble to the configuration of multiple standards gas, and without dismounting, simple in structure, easy to operate, mechanical strength is good.

Description

A kind of device for distributing standard gas for the experiment of sulfur hexafluoride decomposer pre-concentration
Technical field
The utility model is related to a kind of device for distributing standard gas for the experiment of sulfur hexafluoride decomposer pre-concentration.
Background technology
Sulfur hexafluoride gas(SF6)Because being widely used in high voltage electric equipment with excellent insulation and when arc extinction performance In, however SF6Under the conditions of electric discharge is existing, generation ion and atomic group can be decomposed, it, largely can be again after electric discharge It is combined into SF6, a portion can generate the subfluoride such as harmful sulfur tetrafluoride, bifluoride sulphur.There are water inside equipment When dividing with oxygen, subfluoride is chemically reacted with these ingredients, generates a variety of oxygen-containing fluorine sulfide such as sulfur dioxide, fluorination Thionyl, fluorination sulfonyl, hydrogen sulfide, hydrogen fluoride etc..These compounds have extremely strong corrosivity and toxicity mostly, can not only make The deterioration of forming apparatus inner insulation material and corrosion of metal cause apparatus insulated performance degradation, but also entail dangers to is examined Repair the health of personnel.
Cryogenic freezing preconcentration technique and gas chromatographymass spectrometry technology, the volatility being widely used in analysis air Sulfide.But the research that the country measures trace decomposition product in sulfur hexafluoride using pre-concentration-gas chromatography mass spectrometry method is less, according to SF6The difference of TYPICAL DECOMPOSITION product boiling point detects SF using pre-concentration-low-polarity components6TYPICAL DECOMPOSITION product such as titanium dioxide Sulphur, fluorination thionyl, fluorination sulfonyl, hydrogen sulfide, the technology greatly improve the sample introduction concentration of decomposition product, have higher spirit Sensitivity and accuracy efficiently solve low content SF6The test problems of TYPICAL DECOMPOSITION object, it is pre- to the early stage of electrical equipment defect Police is of great significance.
Usually when using cryogenic freezing preconcentration technique with compounds GC-MS technology detection sulfur hexafluoride decomposer, first The experiment work of the advanced quasi- gas calibration curve of rower, method is that the sulfur hexafluoride decomposer of known high concentration is passed through distributing instrument After being diluted to a series of sulfur hexafluoride decomposer Standard Gases of low concentrations, it is transferred to sampling bag respectively, it is special then will to match most intimate friend again Determine the gas connection gas concentration unit of concentration.However this method is easy to adsorb inside sampling bag there are calibrating gas, operation Complexity, repeatedly be attached and removed from sampling bag during be easily mixed into air plankton and also result in gas circuit sealing be deteriorated the problems such as Occur.
Utility model content
In view of the deficiencies of the prior art, the purpose of this utility model be to provide it is a kind of without dismounting, easily operated, structure is simple A kind of single device for distributing standard gas for the experiment of sulfur hexafluoride decomposer pre-concentration.
To achieve these goals, the technical solution adopted in the utility model is as follows:One kind is used for sulfur hexafluoride decomposer The device for distributing standard gas of pre-concentration experiment, including distributing instrument, sampling bottle, vacuum pump, gas concentration unit, pressure gauge, stream Gauge, the distributing instrument are connect by connecting tube with an interface of the first four-way connection, first four-way connection other Three connectors are connect respectively by connecting tube with pressure gauge, sampling bottle, the second four-way connection, the distributing instrument and the described 1st The first needle valve is provided in connecting tube between pass joint, is set in the connecting tube between the sampling bottle and first four-way connection It is equipped with the second needle valve, other three connectors of second four-way connection pass through connecting tube and vacuum pump, flowmeter, the respectively Three needle valves connect, and the 4th needle valve, the stream are provided in the connecting tube between the vacuum pump and second four-way connection Be provided with the 5th needle valve in connecting tube between gauge and second four-way connection, the flowmeter by connecting tube with it is described Gas concentration unit connects.
Preferably, the material of the connecting tube of the connecting components is 316 stainless steels.
Preferably, first needle valve, the second needle valve, third needle valve, the 4th needle valve, the 5th needle valve are all Through-type needle valve.
Preferably, first needle valve, the second needle valve, third needle valve, the 4th needle valve, the 5th needle valve into The caliber size of gas outlet is 1/4 inch.
Preferably, the sampling bottle is Soviet Union's agate tank by Passivation Treatment.
Preferably, the vacuum pump is import dual oil seal sliding vane rotary vacuum pump.
Preferably, the gas concentration unit is 7200 type air pre-concentration instrument of U.S. ENTECH.
A kind of device for distributing standard gas for the experiment of sulfur hexafluoride decomposer pre-concentration of the utility model, used first Needle valve can put down the flow velocity of gaseous sample to the size reasonable that the 5th needle valve is all through-type needle valve and air inlet/outlet diameter It is slow, it is easily controllable;Sampling bottle used is Soviet Union's agate tank by Passivation Treatment, and each gas component can be made to keep steady in storing process It is fixed;Vacuum pump used is import dual oil seal sliding vane rotary vacuum pump, and the vacuum pump sealed reliable, final vacuum is high, facilitates control The flow velocity of gaseous sample;The pressure gauge and flowmeter of setting can observe pressure in sampling bottle and pipeline gas flow in real time Situation, it is ensured that calibrate the reliability of detection;Gases used enrichment facility uses 7200 air pre-concentration instrument of U.S. ENTECH, Concentration to target components is realized using three-level condensation technology, sample introduction effect is good;The air distributing device can be suitble to a variety of marks The configuration of quasi- gas, without dismounting, simple in structure, easy to operate, mechanical strength is good.
Description of the drawings
Fig. 1 is the structure diagram of the utility model.
Specific embodiment
Below in conjunction with specific embodiment, the utility model is described in further detail.
Embodiment 1
With reference to Fig. 1, a kind of device for distributing standard gas for the experiment of sulfur hexafluoride decomposer pre-concentration, including distributing instrument 1st, sampling bottle 6, vacuum pump 9, gas concentration unit 13, pressure gauge 4, flowmeter 12, distributing instrument 1 pass through connecting tube and the first four-way The interface thread connection of connector 3, other three connectors of the first four-way connection 3 respectively by connecting tube and pressure gauge 4, take Sample bottle 6, the second four-way connection 7 are threadedly coupled, and the first aciculiform is provided in the connecting tube between 1 and first four-way connection 3 of distributing instrument Valve 2, is provided with the second needle valve 5 in the connecting tube between 6 and first four-way connection 3 of sampling bottle, the second four-way connection 7 other three A connector is threadedly coupled respectively by connecting tube with vacuum pump 9, flowmeter 12, third needle valve 10,9 and second four-way of vacuum pump It is provided with the 4th needle valve 8 in connecting tube between connector 7, is provided in the connecting tube between 12 and second four-way connection 7 of flowmeter 5th needle valve 11, flowmeter 12 are threadedly coupled by connecting tube with gas concentration unit 13, the connecting tube of connecting components Material is 316 stainless steels, and 2 to the 5th needle valve 11 of the first needle valve is all through-type needle valve, 2 to the 5th needle of the first needle valve The caliber size of the air inlet/outlet of shape valve 11 is 1/4 inch, and sampling bottle 6 is Soviet Union's agate tank by Passivation Treatment, and vacuum pump 9 is Import dual oil seal sliding vane rotary vacuum pump, gas concentration unit 13 are 7200 type air pre-concentration instrument of U.S. ENTECH.
The utility model it is a kind of for sulfur hexafluoride decomposer pre-concentration experiment device for distributing standard gas it is worked Cheng Wei:
(1)Each component is connected by Fig. 1, the first needle valve 2, third needle valve 10, the 5th needle valve 11 is then shut off, opens Open the second needle valve 5, the 4th needle valve 8;
(2)Start vacuum pump 9, gas circuit and sampling bottle 6 are carried out vacuumizing 2 ~ 5min, until system pressure is negative value, close 4th needle valve 8 closes vacuum pump 9, observes pressure gauge 4, checks the air-tightness of gas distribution equipment;
(3)Starting distributing instrument 1, the accurate each parameter for setting distribution after flow speed stability, slowly opens the first needle valve 2, After pressure gauge restores normal pressure, the first needle valve 2 is closed, repeats step(1)~(2)2 ~ 3 times;
(4)Start gas concentration unit 13, after instrument stabilizer, established standards gas sample introduction amount parameter opens the Five needle valves 11 are automatically drawn into the function of standard sample by enrichment facility, realize standard sample automatic sampling;
(5)To continue that next concentration point prepare and sample introduction is analyzed, without needing to change sampling bottle 6, it is only necessary to repeat Step(1)~(4).
A kind of device for distributing standard gas for the experiment of sulfur hexafluoride decomposer pre-concentration of the utility model, used first 2 to the 5th needle valve 11 of needle valve is all the size reasonable of through-type needle valve and air inlet/outlet diameter, can make the stream of gaseous sample It is fast gentle, it is easily controllable;Sampling bottle 6 used is Soviet Union's agate tank by Passivation Treatment, can make each gas component in storing process It keeps stablizing;Vacuum pump 9 used is import dual oil seal sliding vane rotary vacuum pump, and 9 sealed reliable of vacuum pump, final vacuum is high, Facilitate the flow velocity of control gaseous sample;The pressure gauge 4 and flowmeter 12 of setting can observe pressure and pipe in sampling bottle 6 in real time The situation of road gas flow, it is ensured that calibrate the reliability of detection;Gases used enrichment facility 13 uses U.S. ENTECH 7200 Air pre-concentration instrument realizes the concentration to target components using three-level condensation technology, and sample introduction effect is good;The air distributing device can To be suitble to the configuration of multiple standards gas, without dismounting, simple in structure, easy to operate, mechanical strength is good.
Although above having made detailed description to the utility model with a general description of the specific embodiments, But on the basis of the utility model, it can be made some modifications or improvements, this is aobvious and easy to those skilled in the art See.Therefore, the these modifications or improvements on the basis of without departing from the spirit of the present invention, belong to the utility model Claimed range.

Claims (7)

1. a kind of device for distributing standard gas for the experiment of sulfur hexafluoride decomposer pre-concentration, including distributing instrument, sampling bottle, true Empty pump, gas concentration unit, pressure gauge, flowmeter, which is characterized in that the distributing instrument passes through connecting tube and the first four-way connection The connection of an interface, other three connectors of first four-way connection pass through connecting tube and pressure gauge, sampling bottle, the respectively Two four-way connections connect, and the first needle valve is provided in the connecting tube between the distributing instrument and first four-way connection, described Be provided with the second needle valve in connecting tube between sampling bottle and first four-way connection, second four-way connection other three A connector is connect respectively by connecting tube with vacuum pump, flowmeter, third needle valve, and the vacuum pump is connected with the described 2nd 4 The 4th needle valve is provided in connecting tube between head, is provided in the connecting tube between the flowmeter and second four-way connection 5th needle valve, the flowmeter are connect by connecting tube with the gas concentration unit.
2. a kind of device for distributing standard gas for the experiment of sulfur hexafluoride decomposer pre-concentration according to claim 1, It is characterized in that, the material of the connecting tube of the connecting components is 316 stainless steels.
3. a kind of device for distributing standard gas for the experiment of sulfur hexafluoride decomposer pre-concentration according to claim 1, It is characterized in that, first needle valve, the second needle valve, third needle valve, the 4th needle valve, the 5th needle valve are all straight-through Type needle valve.
4. a kind of device for distributing standard gas for the experiment of sulfur hexafluoride decomposer pre-concentration according to claim 1, It is characterized in that, first needle valve, the second needle valve, third needle valve, the 4th needle valve, the 5th needle valve into outlet The caliber size of mouth is 1/4 inch.
5. a kind of device for distributing standard gas for the experiment of sulfur hexafluoride decomposer pre-concentration according to claim 1, It is characterized in that, the sampling bottle is Soviet Union's agate tank by Passivation Treatment.
6. a kind of device for distributing standard gas for the experiment of sulfur hexafluoride decomposer pre-concentration according to claim 1, It is characterized in that, the vacuum pump is import dual oil seal sliding vane rotary vacuum pump.
7. a kind of device for distributing standard gas for the experiment of sulfur hexafluoride decomposer pre-concentration according to claim 1, It is characterized in that, the gas concentration unit is 7200 type air pre-concentration instrument of U.S. ENTECH.
CN201721507496.7U 2017-11-13 2017-11-13 A kind of device for distributing standard gas for the experiment of sulfur hexafluoride decomposer pre-concentration Active CN207502489U (en)

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Application Number Priority Date Filing Date Title
CN201721507496.7U CN207502489U (en) 2017-11-13 2017-11-13 A kind of device for distributing standard gas for the experiment of sulfur hexafluoride decomposer pre-concentration

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