CN112505030A - For SF6SO in decomposition product gas2Component detection device and method - Google Patents
For SF6SO in decomposition product gas2Component detection device and method Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 65
- 238000000354 decomposition reaction Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title abstract description 15
- 239000002775 capsule Substances 0.000 claims abstract description 34
- 238000005070 sampling Methods 0.000 claims abstract description 14
- 244000261422 Lysimachia clethroides Species 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 44
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 238000010521 absorption reaction Methods 0.000 claims description 19
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 16
- 238000011161 development Methods 0.000 claims description 13
- AXDJCCTWPBKUKL-UHFFFAOYSA-N 4-[(4-aminophenyl)-(4-imino-3-methylcyclohexa-2,5-dien-1-ylidene)methyl]aniline;hydron;chloride Chemical compound Cl.C1=CC(=N)C(C)=CC1=C(C=1C=CC(N)=CC=1)C1=CC=C(N)C=C1 AXDJCCTWPBKUKL-UHFFFAOYSA-N 0.000 claims description 10
- 238000012360 testing method Methods 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 8
- 235000011187 glycerol Nutrition 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000012795 verification Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 43
- 229910018503 SF6 Inorganic materials 0.000 description 24
- 239000000047 product Substances 0.000 description 15
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 8
- 238000003860 storage Methods 0.000 description 7
- 239000003153 chemical reaction reagent Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 3
- 229960000909 sulfur hexafluoride Drugs 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- RZUBARUFLYGOGC-MTHOTQAESA-L acid fuchsin Chemical compound [Na+].[Na+].[O-]S(=O)(=O)C1=C(N)C(C)=CC(C(=C\2C=C(C(=[NH2+])C=C/2)S([O-])(=O)=O)\C=2C=C(C(N)=CC=2)S([O-])(=O)=O)=C1 RZUBARUFLYGOGC-MTHOTQAESA-L 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000000586 desensitisation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- ZPWVASYFFYYZEW-UHFFFAOYSA-L dipotassium hydrogen phosphate Chemical compound [K+].[K+].OP([O-])([O-])=O ZPWVASYFFYYZEW-UHFFFAOYSA-L 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910000402 monopotassium phosphate Inorganic materials 0.000 description 1
- 235000019796 monopotassium phosphate Nutrition 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
- G01N21/783—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour for analysing gases
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N2021/775—Indicator and selective membrane
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N2021/7756—Sensor type
- G01N2021/7763—Sample through flow
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N2021/7756—Sensor type
- G01N2021/7766—Capillary fill
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention provides a method for SF6SO in decomposition product gas2The device comprises a gas taking connector, wherein the gas taking connector is connected to a sampling cylinder through a gooseneck, a detection connecting seat is arranged on the sampling cylinder, a quick detection capsule is connected to the detection connecting seat, and a gas outlet end of the sampling cylinder is connected with a flow meter through a tail gas pipeline. The invention reduces the volume, saves the power supply, does not need to carry out regular verification, has good flexibility, has the advantages of low cost, high sensitivity and accurate measurement value in the conventional SF6 detection, can quickly judge the fault condition of the SF6 equipment, avoids the early deployment of the detection site, reduces the configuration of detection group members, is used in some engineering works, and can effectively improve the construction period progress.
Description
Technical Field
The invention relates to SF6The technical field of measurement of decomposition product gas, in particular to a method for measuring SF6SO in decomposition product gas2A component detection device and method.
Background
SF6The gas is widely used in the construction and operation of a power grid, and the excellent insulation stability of the gas is obviously embodied in the aspects of energy conservation and emission reduction, reliable equipment operation, longer maintenance period retentivity and the like. However, SF6 inevitably contacts oxygen-containing, water-containing, high-temperature, high-current environments during use, and significant decomposition phenomena can occur at 300 ℃. Wherein SO2The gas being SF6The numerical value of the main characteristic product at the overheat fault temperature of 300-400 ℃ can roughly judge the severity of the discharge fault.
The current in high-voltage electrical equipment is up to thousands of amperes, when the equipment has a point with too large connecting resistance, abnormal heating phenomenon can be produced, when the equipment has local overheat fault, the local overheat fault is often accompanied with SF6Decomposition reaction of gas, and complete elimination of air and moisture in the equipment is impossible, and under the influence of these factors, SF6The decomposition of the gas takes place very rapidly.
SF6There are many methods for detecting the decomposition products of the gas, but the existing method has complex detection device, high cost and needs a large amount of personnel to participate. When the common electrochemical sensor detection equipment is used, the situation of data drift, flicker and failure sometimes occurs can influence the field detection operation and interfere the judgment of decision personnel on the fault; the electrochemical sensor equipment needs to be checked regularly, standard transmission errors inevitably exist, and partial components in sulfur hexafluoride decomposition gas cannot be detected effectively through the electrochemical sensor at present.
Disclosure of Invention
The invention aims toProvide a method for SF6SO in decomposition product gas2Apparatus and method for detecting component in SF6The method has the advantages of classical principle, low cost, high sensitivity and good stability in conventional detection, and can quickly judge SF6The failure condition of the equipment avoids the early deployment of a detection field, reduces the configuration of detection team members, is used in some engineering works, and can effectively improve the construction period progress.
The technical scheme of the invention is as follows:
for SF6SO in decomposition product gas2The detection device of composition, including getting the gas and connecting, get the gas and connect and be connected to the cartridge through the gooseneck, be provided with on the cartridge and detect the connecting seat, connect the quick-witted capsule of examining on detecting the connecting seat, pass through tail gas pipeline at the end of giving vent to anger of cartridge and connect the flowmeter.
The detection connecting seat comprises an air inlet pipe and an air outlet pipe, the air inlet pipe and the air outlet pipe are both S-shaped pipes, the lower ends of the air inlet pipe and the air outlet pipe extend into the central position of the sampling cylinder, the lower end opening of the air inlet pipe is opposite to the air inlet direction, the lower end opening of the air outlet pipe is opposite to the air inlet direction, the upper ends of the air inlet pipe and the air outlet pipe extend out of the sampling cylinder, the upper end openings of the air inlet pipe and the air outlet pipe are opposite to the setting, a connecting end is.
The quick detection capsule comprises an air inlet end and an air outlet end, the air inlet end and the air outlet end are inserted into connecting ends of an air inlet pipe and an air outlet pipe, a silicon dioxide absorption layer is arranged in an air inlet pipeline of the quick detection capsule, a balloon is arranged at the central position of the quick detection capsule, a color development cavity is arranged in the balloon, and the color development cavity is connected to an absorption liquid cavity filled with sodium hydroxide mixed solution through a capillary tube.
The link adopts pneumatic quick joint design, convenient and examine the quick connection of capsule soon.
The fuchsin solution is adsorbed and stored in the color development cavity through a water-fixing substance, the fuchsin solution contains 5% of glycerin to assist in keeping the water content of the solution, the shelf life of the solution is prolonged, and the concentration of the sodium hydroxide solution in the absorption liquid cavity is 0.05 mol/L.
The water-fixing substance is a quartz sand core.
The quick-check capsule is made of transparent rubber.
For SF6SO in decomposition product gas2The component detection method comprises the following specific steps:
s1, keeping the control valve in a closed state, and connecting the gas taking joint with SF6The decomposition product gas generating device starts to regulate the flow, the quick detection capsule is inserted into the connecting end of the detection connecting seat, the flowmeter is connected, and the air tightness of the device is checked;
s2, extruding an absorption liquid cavity in the quick detection capsule, injecting a solution into a water-fixing substance in the color development cavity through a capillary tube, opening a control valve to perform ventilation operation, starting timing, and allowing SF6 decomposition product gas to enter the quick detection capsule through an air inlet end and then to be discharged through an air outlet end;
s3, observing the time for the solution in the color developing cavity to turn red again after the solution turns from red to colorless to finish SO2And (4) detecting the components.
Compared with the prior art, the invention has the beneficial effects that: the size is reduced, a power supply is omitted, the regular verification is not needed, the flexibility is good, the advantages of classic principle, low cost, high sensitivity and good stability are achieved in SF6 conventional detection, the fault condition of SF6 equipment can be judged quickly, the early deployment of a detection field is avoided, meanwhile, the configuration of detection group members is reduced, the method is used in some engineering works, and the construction period progress can be effectively improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the apparatus of the present invention.
FIG. 2 is a schematic view of a cartridge and test connection block of the present invention.
Fig. 3 is a schematic diagram of the structure of the quick-check capsule of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-3, a method for SF6SO in decomposition product gas2Detection device of composition, including getting gas joint 1, get gas joint 1 and be connected to sampling barrel 3 through gooseneck 2, be provided with on sampling barrel 3 and detect connecting seat 4, connect quick-witted capsule 5 of examining on detecting connecting seat 4, end of giving vent to anger at sampling barrel 3 passes through tail gas pipeline 6 and connects flowmeter 7.
The detection connecting seat 4 comprises an air inlet pipe 40 and an air outlet pipe 41, the air inlet pipe 40 and the air outlet pipe 41 are both S-shaped pipes, the lower ends of the air inlet pipe 40 and the air outlet pipe 41 extend into the central position of the sampling cylinder 3, the lower end opening of the air inlet pipe 40 is opposite to the air inlet direction, the lower end opening of the air outlet pipe 41 is opposite to the air inlet direction, so that the air inlet end 50 and the air outlet end 51 of the quick detection capsule 5 form pressure difference through an air inlet pipeline, and sample air can be guided to pass through the detection cavity. The upper ends of the air inlet pipe 40 and the air outlet pipe 41 extend out of the sampling cylinder 3, the upper end openings of the air inlet pipe 40 and the air outlet pipe 41 are arranged oppositely, a connecting end 42 is arranged at the upper end opening, and a control valve 43 is arranged at the connecting end 42.
The quick detection capsule 5 comprises an air inlet end 50 and an air outlet end 51, the air inlet end 50 and the air outlet end 51 are inserted into a connecting end 42 on an air inlet pipe 40 and an air outlet pipe 41, a silicon dioxide absorption layer 52 is arranged in a pipeline of the air inlet end 50 of the quick detection capsule 5 to remove HF gas in sample gas in advance, a balloon 53 is arranged at the central position of the quick detection capsule 5, a color development cavity 54 is arranged in the balloon 53, and the color development cavity 54 is connected to an absorption liquid cavity 55 filled with sodium hydroxide solution through a capillary 56.
The fuchsin solution is adsorbed and stored in the color development cavity 54 through a water-fixing substance, the fuchsin solution contains 5% of glycerin to assist in keeping the water content of the solution, the shelf life of the solution is prolonged, and the concentration of the sodium hydroxide solution in the absorption liquid cavity 55 is 0.05 mol/L.
The water-fixing substance is a quartz sand core.
The connecting end 42 adopts a pneumatic quick joint structure, so that the quick connection with the quick detection capsule 5 is facilitated.
The quick-check capsule 5 is made of transparent rubber.
For SF6SO in decomposition product gas2The component detection method comprises the following specific steps:
s1, keeping the control valve 43 in a closed state, and connecting the gas taking connector 1 with SF6A decomposition product gas generating device, and starting to regulate the flow rate, a quick test capsule 5 is inserted into the connecting end 42 of the test connecting seat 4, a flow meter 7 is connected, and the air tightness of the device is checked;
s2, an absorption liquid cavity 55 in the quick test capsule 5 is squeezed, the solution is injected into a water-fixing substance in a color development cavity (54) through a capillary tube 56, at the moment, a control valve 43 is opened for ventilation operation, timing is started, and SF6 decomposition product gas enters the quick test capsule 5 through an air inlet end 50 and then is discharged through an air outlet end 51;
s3, observing the time for the solution in the color developing cavity 4 to turn red again after the solution turns from red to colorless to finish SO2And (4) detecting the components.
The method also comprises the following specific steps before the step S1:
1) preparing a solution:
through testing the color change detection solution samples of three formulas, a proper detection solution is selected to match a detection device, and the three formulas are as follows:
the formula I is as follows: dipotassium hydrogen phosphate/fuchsin/glycerol solution system
And a second formula: potassium dihydrogen phosphate/fuchsin/glycerol solution system
And the formula III: sodium hydroxide/fuchsin/glycerin solution system
The formula four: sodium bicarbonate/fuchsin/glycerin solution system
Acid fuchsin is selected as a color change indicator in the formula.
2. Determining the storage stability condition of the detection reagent and an actual storage method:
all three reagents can change color within the appropriate time range under laboratory conditions. In the aspect of the quality guarantee period of the reagent, the storage method selects sealed and low-temperature storage, and after a 30-day quality guarantee period test, the quality guarantee periods of the formula I, the formula III and the formula IV are shorter and the storage time of the formula II is longest under the same condition. The shelf life of formula one, formula three and formula four is shown in that the solution undergoes a significant color change in a short time, which is not in accordance with the original design purpose of the present invention, and the significant color change causes the desensitization of the reagent.
After the absorption liquid of formula one and formula three was kept separately from the indicator solution, the shelf life was found to be comparable to that of formula two.
3. Sensitivity test:
carrying out SO2And the sensitivity of gas is detected, the sensitivity of the formula III and the formula IV is better, and the sensitivity of the formula I is slightly lower.
4. Determination of Low concentration SO2Minimum detection limit of gas:
and introducing low-flow sample gas into the solution of the third formula, and determining the proportion of the absorption liquid and the color indicator of the solution of the third formula by taking the detection time of two minutes as a limit.
5. Sulfur hexafluoride gas containing each component is configured by utilizing a mass flow gas distribution device, and HF and H are added in various gases in a trial manner2S、CO2The gas is made into mixed sulfur hexafluoride gas. Various mixed gases are respectively introduced into the formula three solution system, and the formula three solution is not sensitive to the gases within a specified time range.
6. Filling the color indicator and the absorption liquid into a color developing capsule, sealing the capsule, and storing at low temperature for later use.
(1) Principle of color transition:
introducing SF into the mixed solution of fuchsin-absorption liquid at a certain flow rate6Decomposition product gas, SO in the gas2The components generate reaction products according to the formula 1, and SO is absorbed along with the absorption solution2The color depth of the absorbing solution becomes gradually lighter due to the destruction of the functional groups in the quinoid of magenta (formula 2) by the continuous absorption of the gas;
SO2+ absorbing liquid ═ HSO3 ˉEquation 1
(2) When SO2After complete reaction with the absorption solution, resulting in the conversion of bisulfite to sulfite, the color is rapidly removed, followed by acidification of the solution, "-NH" -2Protonation to-NH3However, the sulfonic acid group conjugate system is not changed, the molecular spectrum is wholly red-shifted, and the solution is wholly red-shifted.
(3) Judging the opportunity:
the solution system turns red again after being decolored as a judgment opportunity.
(4) Shelf life of the mixed solution of fuchsin-absorbing liquid for storage and detection of effect:
the finished capsule is stored in a refrigerated way, and the quality guarantee time is longer than that of common chemical reagents.
(5) Control of minimum detected concentration
By adjusting the component ratio of the mixed solution of fuchsin-absorbing liquid, the lowest measurable SO2The concentration was 0.5. mu.l/L.
Compared with the conventional detection means, the detection device has the following advantages.
Detecting the progress in advance:
when in use, the device does not need to be lapped with a power supply, a long gas taking pipeline is not needed, and a detection site is not needed to be arranged.
The deployment of field detection personnel is reduced:
the detection method of the invention does not need to connect a long gas taking pipeline, and can reduce the configuration of personnel on the premise of not violating the power safety production regulation.
The production cost is saved:
the finished capsule has loose storage conditions and can be taken and used at any time. Meanwhile, equipment maintenance is omitted, and the size of the equipment is reduced.
The emission of greenhouse gases can be reduced:
the sensitive reaction reagent has no phenomena of data drift, electromagnetic interference, hop count caused by sampling frequency and the like of common detection equipment, and avoids invalid detection.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. For SF6SO in decomposition product gas2Detection device of composition, its characterized in that is including getting gas joint (1), get gas joint (1) and be connected to sampling barrel (3) through gooseneck (2), be provided with on sampling barrel (3) and detect connecting seat (4), connect fast check capsule (5) on detecting connecting seat (4), end of giving vent to anger at sampling barrel (3) is through tail gas pipeline (6) connection flowmeter (7).
2. For SF according to claim 16SO in decomposition product gas2Detection device of composition, a serial communication port, detect connecting seat (4) including intake pipe (40) and outlet duct (41), intake pipe (40) and outlet duct (41) are S type pipe, the central point that the lower extreme of intake pipe (40) and outlet duct (41) stretched into cartridge (3) puts, the lower extreme opening of intake pipe (40) is just to coming the gas direction, the lower extreme opening of outlet duct (41) is back to the gas direction that comes, cartridge (3) are extended to the upper end of intake pipe (40) and outlet duct (41), the upper end opening of intake pipe (40) and outlet duct (41) is just to setting up, and be provided with link (42) at the upper end opening part, control valve (43) are installed in link (42) play.
3. For SF according to claim 26SO in decomposition product gas2The component detection device is characterized in that the quick detection capsule (5) comprises an air inlet end (50) and an air outlet end (51), and the air inlet end (50) and the air outlet end (51) are inserted into the air inlet pipe (40) and the air outlet pipe (41)The quick-detection device comprises a connecting end (42), wherein a silicon dioxide absorption layer (52) is arranged in a pipeline of an air inlet end (50) of a quick-detection capsule (5), a balloon (53) is arranged at the central position of the quick-detection capsule (5), a color development cavity (54) is arranged in the balloon (53), and the color development cavity (54) is connected to an absorption liquid cavity (55) filled with a sodium hydroxide mixed solution through a capillary tube (56).
4. For SF according to claim 36SO in decomposition product gas2Detection device of composition, its characterized in that, link (42) adopt pneumatic quick joint design, convenient and examine the quick connection of capsule (5) soon.
5. The device for detecting the SO2 component in the SF6 decomposition product gas as claimed in claim 3, wherein a fuchsin solution is stored in the color development chamber (54) through solid-water adsorption, the fuchsin solution contains 5% of glycerin to assist in keeping the solution moisture and improve the shelf life of the solution, and the concentration of the sodium hydroxide solution in the absorption liquid chamber (55) is 0.05 mol/L.
6. The detection device for the SO2 component in the SF6 decomposition product gas as recited in claim 5, wherein said water-fixing substance is a quartz sand core.
7. For SF according to any of claims 1-66SO in decomposition product gas2The component detection device is characterized in that the quick detection capsule (5) is made of transparent rubber.
8. For SF6SO in decomposition product gas2The component detection method is characterized by comprising the following specific steps:
s1, keeping a control valve (43) in a closed state, and connecting an air intake joint (1) with SF6A decomposition product gas generating device and starts to regulate the flow rate, a quick test capsule (5) is inserted into a connecting end (42) of the test connecting seat (4), a flow meter (7) is connected, and the device is checkedAir tightness;
s2, an absorption liquid cavity (55) in the quick detection capsule (5) is squeezed, the solution is injected into a water-fixing substance in a color development cavity (54) through a capillary tube (56), at the moment, a control valve (43) is opened to conduct ventilation operation, timing is started, and SF6 decomposition product gas enters the quick detection capsule (5) through an air inlet end (50) and then is discharged through an air outlet end (51);
s3, observing the time that the solution in the color development cavity (4) turns red again after changing red into colorless, and finishing SO2And (4) detecting the components.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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