CN204302062U - Low absorbability, sulfur hexafluoride sampler without dead angle gas washing - Google Patents

Abstract

Low absorbability, sulfur hexafluoride sampler without dead angle gas washing, comprise sampling bottle and Drexel bottle, connected by tube connector between the bottleneck of described sampling bottle and the bottleneck of Drexel bottle, tube connector is provided with sampling pressure vacuum meter closing on sampling bottle place, tube connector is provided with gas washing pressure vacuum meter closing on Drexel bottle place, be provided with three-way switch valve in the middle part of tube connector, the 3rd interface of three-way switch valve is connected with probe tube by straight joint; The inwall of the inwall of sampling bottle, the inwall of tube connector, three-way switch valve and the inwall of probe tube all adopt inertia passivation process to be provided with one deck corrosion-resistant finishes.The utility model can ensure the former state of gas to be sampled, and prevents the reaction of sampling bottle inwall and sample gas middle acid substance, and reduces sampler inwall to sample gas adsorptivity.

Description

Low absorbability, sulfur hexafluoride sampler without dead angle gas washing

Technical field

The utility model relates to a kind of specially to the low absorbability of sulfur hexafluoride gas sampling, the sulfur hexafluoride sampler without dead angle gas washing in electrical equipment.

Background technology

Sulfur hexafluoride is primary insulation medium and the arc-extinguishing medium of gas insulated electric apparatus, and the quality of sulfur hexafluoride gas and gas insulated electric apparatus insulating properties and arc extinction performance have much relations.Therefore, no matter country or the relevant departments of power industry are all propose corresponding gaseous mass examination criteria or supervision and management code, regulation to the new gas of sulfur hexafluoride or to the gas run in sulfur hexafluoride gas-insulating electrical equipment when gas and equipment run and disintegrates.Wherein, just there is the regulation to sulfur hexafluoride gas sampling method, as " DL/T 1032-2006 electrical equipment sulfur hexafluoride (SF ₆) gas sampling method " and in detailed regulation has been carried out to the sampling container of sulfur hexafluoride gas, the method for sampling and Sample storage, true to ensure the sample gathered.It should be noted that, the sampling method in above-mentioned standard is not only applicable to the electrical equipment that breaker, combined electric, transformer, transformer etc. use sulfur hexafluoride gas, is applicable to sulfur hexafluoride gas steel cylinder and air accumulator yet.

According to " DL/T 1032-2006 electrical equipment sulfur hexafluoride (SF ₆) gas sampling method " and relevant regulations, sampling container has 2 kinds, steel cylinder and polybag.When sulfur hexafluoride gas pressure is lower than 0.2MPa, both all can use; When sulfur hexafluoride gas pressure is higher than 0.2MPa, just can only apply there is decompressor stainless steel steel cylinder as sampling container.In view of this sampling container of polybag have pressure too high time burst the suspicion of sampling bag, the electric power chemistry institute of each Utilities Electric Co. or chemistry institute are more prone to application stainless steel steel cylinder as sampling container.

" DL/T 1032-2006 electrical equipment sulfur hexafluoride (SF ₆) gas sampling method " and in the same specification concept of sampling bottle and sampler: sampling bag: be with valvular composite plastic sealing bag; Sampling bottle: the canister that can bear gas pressure; Sampler: with application of vacuum ability and the device there is electrical equipment being connected with sampling bottle.Specify that " sampler ", further comprises the part be connected with electrical equipment.

But steel cylinder sampler also exists some drawbacks in application process: one, there is faint adsorptivity to sulfur hexafluoride gas in bottle inwall; Its two, if in the sampling gas gathered from sulfur hexafluoride electrical equipment containing strong corrosive material as HF, SO ₂deng, when these materials and sampling steel cylinder inwall making contact, there is faint adsorptivity to sulfur hexafluoride gas in inner wall of steel cylinder, will in a small contact area with sampling steel cylinder inwall material generation chemical reaction, corrosion inner wall of steel cylinder, thus affect the authenticity of gas sampled.

Steel cylinder sampler, before sampling, first vacuumizes process to steel cylinder sampler inside, makes gas sample container free from admixture gas to ensure the former state of gas sampled and pollution-free.But vacuumize process to vacuumize steel cylinder sampler and Subsampling pipeline, do not accomplish to vacuumize process to sampling container and the portion gas piping installation that is connected with sample devices, like this, when carrying out gas sample operation, the foreign gases such as the minute dusts of air, tube wall in this part sampling line, will be had also to be entered gas sample collector by as sample gas.And in field operation, because electrical equipment is general all taller and bigger, " electrical equipment is connected with sampling bottle " sampling line reaches 1 ~ 2 meter usually, like this, the pollution of gas sampled in sampling container will be caused, affect the former state of gas sampled sample, and then affect the Testing index of gas sampled.

Utility model content

The utility model in order to solve weak point of the prior art, provide a kind of structure simple, the low absorbability of sulfur hexafluoride gas sample authenticity, the sulfur hexafluoride sampler without dead angle gas washing can be improved.

For solving the problems of the technologies described above, the utility model adopts following technical scheme: low absorbability, sulfur hexafluoride sampler without dead angle gas washing, comprise sampling bottle and Drexel bottle, connected by tube connector between the bottleneck of described sampling bottle and the bottleneck of Drexel bottle, tube connector is provided with sampling pressure vacuum meter closing on sampling bottle place, tube connector is provided with gas washing pressure vacuum meter closing on Drexel bottle place, be provided with three-way switch valve in the middle part of tube connector, the 3rd interface of three-way switch valve is connected with probe tube by straight joint;

The inwall of the inwall of sampling bottle, the inwall of tube connector, three-way switch valve and the inwall of probe tube all adopt inertia passivation process to be provided with one deck corrosion-resistant finishes.

Adopt technique scheme, before carrying out gas sample, need to vacuumize sampling bottle.Gas piping connects vaccum-pumping equipment, carries out vacuum pumping to whole sampling bottle; The vacuum of sampling bottle can be judged according to the instruction of the sampling pressure vacuum meter on sampling bottle and the gas washing pressure vacuum meter in Drexel bottle.After vacuumizing, carry out gas sample, probe tube is connected electrical equipment to be sampled.Now, be not vacuum in three-way switch valve to the probe tube of electrical equipment to be sampled, owing to cruelly leaking in atmosphere, air can be full of in this section of probe tube, perhaps, tube wall has the impurity such as minute dusts, air in this part pipeline and minute dusts pollute to gas to be sampled, affect the former state of gas sampled sample, affect the Testing index of gas sampled.So this part foreign gas needs first to rinse out.Operation three-way switch valve, electrical equipment to be sampled is communicated with Drexel bottle, and the air in probe tube and impurity are under the effect of effluent air from sampling equipment, and be charged in Drexel bottle, probe tube is rinsed.After gas washing, then operate three-way switch valve, equipment to be sampled is communicated with sampling bottle, gas to be sampled flows into collecting bottle from equipment to be sampled, completes the sampling of gas.After sampling, then operate three-way switch valve, make Drexel bottle and sampling bottle be in closed condition.Wash away in the portion gas piping installation that sampling bottle is connected with sample devices not accomplish to vacuumize in gas sample process and process and the impurity such as minute dusts of the air existed, tube wall, ensure the former state of gas to be sampled.

The inwall of the inwall of sampling bottle, the inwall of tube connector, three-way switch valve and the inwall of probe tube all adopt inertia passivation process to be provided with one deck corrosion-resistant finishes.Make sampler to SF after process ₆gas and catabolite thereof have compatibility and the adsorptivity of superfine trace.On the one hand, due to the inertia Passivation Treatment of the materials such as sampling bottle, tube connector, probe tube and three-way switch valve, can effectively prevent to contain strong corrosive material as HF, SO in sampling gas ₂deng with chemical reaction during sampling steel cylinder inwall making contact, on the other hand, through the area of transpassivation than stainless steel material, quality is wanted closely and smooth, effectively can weaken sampler inwall to SF ₆the adsorptivity of gas and analyte thereof.

Treated sampler is to SF ₆the adsorptivity of gas and analyte thereof weakens, and the chemical reaction that the sample gas of less as much as possible sampler inwall material and collection may exist, thus ensure that the time of day of sample, carry out SF with chromatogram or mass spectrum at the scene to being not easy to ₆the occasion that GAS QUALITY is analyzed is significant.

In sum, the utility model overcomes the defect that common steel cylinder sampler on the market exists, for user provide reliably, field experiment gas really.Prevented the reaction of sampling bottle inwall and sample gas middle acid substance by the structure increasing special corrosion-resistant finishes at sampler inwall, and reduce sampler inwall to sample gas adsorptivity.The utility model is not only applicable to the sampling of sulfur hexafluoride (SF6) gas, also be applicable to the sampling of other gases, particularly some special gases are as the sampling of corrosive gas hydrogen fluoride gas (HF), that can guarantee gas sampled with uniformity that is gas to be sampled.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the upward view after removing probe tube in the middle of Fig. 1.

Detailed description of the invention

As depicted in figs. 1 and 2, low absorbability of the present utility model, sulfur hexafluoride sampler without dead angle gas washing, comprise sampling bottle 1 and Drexel bottle 2, connected by tube connector 3 between the bottleneck of described sampling bottle 1 and the bottleneck of Drexel bottle 2, tube connector 3 is provided with sampling pressure vacuum meter 4 closing on sampling bottle 1 place, tube connector 3 is provided with gas washing pressure vacuum meter 5 closing on Drexel bottle 2 place, be provided with three-way switch valve 6 in the middle part of tube connector 3, the 3rd interface of three-way switch valve 6 is connected with probe tube 7 by straight joint 9.

The inwall of sampling bottle 1, the inwall of tube connector 3, the inwall of three-way switch valve 6 and the inwall of probe tube 7 all adopt inertia passivation process to be provided with one deck corrosion-resistant finishes 8.

Before carrying out gas sample, need to vacuumize sampling bottle 1.Gas piping connects vaccum-pumping equipment, carries out vacuum pumping to whole sampling bottle 1; The vacuum of sampling bottle 1 can be judged according to the instruction of the sampling pressure vacuum meter 4 on sampling bottle 1 and the gas washing pressure vacuum meter 5 in Drexel bottle 2.After vacuumizing, carry out gas sample, probe tube 7 is connected electrical equipment 10 to be sampled.Now, it is not vacuum in three-way switch valve 6 to the probe tube 7 of electrical equipment 10 to be sampled, owing to cruelly leaking in atmosphere, air can be full of in this section of probe tube 7, perhaps, tube wall has the impurity such as minute dusts, air in this part pipeline and minute dusts pollute to gas to be sampled, affect the former state of gas sampled sample, affect the Testing index of gas sampled.So this part foreign gas needs first to rinse out.Operation three-way switch valve 6, electrical equipment 10 to be sampled is communicated with Drexel bottle 2, and the air in probe tube 7 and impurity are under the effect of effluent air from sampling equipment, and be charged in Drexel bottle 2, probe tube 7 is rinsed.After gas washing, then operate three-way switch valve 6, equipment to be sampled is communicated with sampling bottle 1, gas to be sampled flows into collecting bottle from equipment to be sampled, completes the sampling of gas.After sampling, then operate three-way switch valve 6, make Drexel bottle 2 and sampling bottle 1 be in closed condition.Wash away in the portion gas piping installation that sampling bottle 1 is connected with sample devices not accomplish to vacuumize in gas sample process and process and the impurity such as minute dusts of the air existed, tube wall, ensure the former state of gas to be sampled.

The inwall of sampling bottle 1, the inwall of tube connector 3, the inwall of three-way switch valve 6 and the inwall of probe tube 7 all adopt inertia passivation process to be provided with one deck corrosion-resistant finishes 8.Make sampler to SF after process ₆gas and catabolite thereof have compatibility and the adsorptivity of superfine trace.On the one hand, due to the inertia Passivation Treatment of the materials such as sampling bottle 1, tube connector 3, probe tube 7 and three-way switch valve 6, can effectively prevent to contain strong corrosive material as HF, SO in sampling gas ₂deng with chemical reaction during sampling steel cylinder inwall making contact, on the other hand, through the area of transpassivation than stainless steel material, quality is wanted closely and smooth, effectively can weaken sampler inwall to SF ₆the adsorptivity of gas and analyte thereof.

Treated sampler is to SF ₆the adsorptivity of gas and analyte thereof weakens, and the chemical reaction that the sample gas of less as much as possible sampler inwall material and collection may exist, thus ensure that the time of day of sample, carry out SF with chromatogram or mass spectrum at the scene to being not easy to ₆the occasion that GAS QUALITY is analyzed is significant.

Above embodiment is the unrestricted the technical solution of the utility model in order to explanation only, although be described in detail the utility model with reference to above-described embodiment, those of ordinary skill in the art is to be understood that: still can modify to the utility model or equivalent replacement, and not departing from any modification or partial replacement of spirit and scope of the present utility model, it all should be encompassed in the middle of right of the present utility model.

Claims (1)

1. low absorbability, sulfur hexafluoride sampler without dead angle gas washing, comprise sampling bottle and Drexel bottle, it is characterized in that: connected by tube connector between the bottleneck of described sampling bottle and the bottleneck of Drexel bottle, tube connector is provided with sampling pressure vacuum meter closing on sampling bottle place, tube connector is provided with gas washing pressure vacuum meter closing on Drexel bottle place, be provided with three-way switch valve in the middle part of tube connector, the 3rd interface of three-way switch valve is connected with probe tube by straight joint;

The inwall of the inwall of sampling bottle, the inwall of tube connector, three-way switch valve and the inwall of probe tube all adopt inertia passivation process to be provided with one deck corrosion-resistant finishes.