CN219977699U - Sample gas passage air tightness detection device of ion chromatograph such as insulating oil - Google Patents
Sample gas passage air tightness detection device of ion chromatograph such as insulating oil Download PDFInfo
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- CN219977699U CN219977699U CN202320935678.3U CN202320935678U CN219977699U CN 219977699 U CN219977699 U CN 219977699U CN 202320935678 U CN202320935678 U CN 202320935678U CN 219977699 U CN219977699 U CN 219977699U
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- insulating oil
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- sample gas
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- 238000001514 detection method Methods 0.000 title claims abstract description 58
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 14
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 9
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 251
- 239000000523 sample Substances 0.000 description 94
- 150000002500 ions Chemical class 0.000 description 47
- 239000012159 carrier gas Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- 230000037039 plant physiology Effects 0.000 description 2
- 239000003570 air Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Examining Or Testing Airtightness (AREA)
Abstract
The utility model discloses a detection device for the air tightness of a sample gas passage of an ion chromatograph such as insulating oil, which comprises a gas collecting tube, an enrichment chamber, a pressurizing piece and a sensor, wherein the gas collecting tube penetrates in the length direction, two ends of the enrichment chamber are respectively connected with the gas collecting tube through pipelines, the pressurizing piece is connected with the gas inlet end of the enrichment chamber, and the sensor is positioned in the enrichment chamber. The utility model has the beneficial effects that: the detection gas circuit and the sample gas circuit are relatively independent and do not interfere with each other, so that the problem that the tiny leakage of the ion chromatograph such as insulating oil cannot be detected in place is solved, and the detection accuracy of the ion chromatograph such as insulating oil is improved.
Description
Technical Field
The utility model relates to an air tightness detection technology, in particular to a detection device for the air tightness of a sample air passage of an ion chromatograph for dissolving insulating oil and the like in insulating oil.
Background
An ion chromatograph such as an insulating oil is an ultra-high sensitivity detector, and is generally applied to detection of trace gases in most pure gas, high-purity gas or mixed gas, so that tiny leakage of a detection sample gas passage of the ion chromatograph such as the insulating oil can have a great influence on a detection result.
The detection of the content of dissolved gas in the transformer insulating oil is a main means for finding and diagnosing faults of the transformer, the content of the components of the dissolved gas in the transformer insulating oil is relatively low in early faults, the components cannot be detected by the traditional chromatograph, and the ion chromatograph such as the insulating oil can be used as a super-sensitive detector for detecting the super-trace level (10 -9 ～10 -6 ) Dissolving the gas.
The ion chromatograph such as insulating oil can appear the ageing, damage of pipeline after long-time operation, cause the gas leakage; aging and damage of the sample injection pad and the sealing ring can also cause air leakage when the sample injection pad and the sealing ring are used for a long time; the chromatograph can lead to connecting valve, pipeline joint to become flexible when collision appears in the use to lead to gas leakage. When the ion chromatograph such as insulating oil detects leakage of the sample gas passage, the trace gas to be detected (< 10) -6 ) The air leaks into the air, and oxygen, nitrogen and moisture in the air can also permeate into the ion chromatograph such as the insulating oil, so that the accuracy of the detection result is affected, and the air tightness of the ion chromatograph such as the insulating oil is required to be detected.
The existing chromatograph sample gas passage is usually used for blocking a sample gas outlet, opening a carrier gas flow path to regulate the low-pressure output pressure to be 0.35-0.6 MPa, and opening a carrier gas knob on a main machine panel, wherein the pressure gauge is indicated at the moment. And finally, closing the carrier gas knob, wherein the pre-column pressure indicated value of the carrier gas knob does not drop within half an hour, and leakage exists if the carrier gas knob drops, so that the carrier gas knob is eliminated. However, the method generally adopts a manual air source valve to control the flow when the air is inflated, so that the control accuracy is difficult to ensure, an explosion air path or a pressure gauge can be directly used when the air pressure is too high, expensive and precise equipment is damaged, huge loss is caused, the operation is complex, and trace leakage cannot be observed. This procedure cannot be applied to online detection.
Or as in patent publication No.: CN215574878U, a plant physiology detects with gas chromatograph of being convenient for pipeline leak test, when needs use gas chromatograph to detect plant physiology, this device detects the gas in the pipeline constantly, and the probe of gas detector can detect the gas concentration in the pipeline and become low, has just taken place to leak and quick this information transmission for control element, and control element control alarm's opening reminds experimenter pipeline through taking place to leak. The device directly detects the gas concentration in the pipeline by the gas detector, and the gas concentration is difficult to detect for slow and tiny leakage completely depends on the precision of the gas detector.
The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information has been made as prior art that is well known to a person of ordinary skill in the art.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: how to solve the problem that the detection result is inaccurate caused by the fact that the detection mode of the gas circuit of the ion chromatograph such as insulating oil cannot detect tiny leakage.
The utility model solves the technical problems by the following technical means:
the detection device comprises a gas collecting tube, an enrichment chamber, a pressurizing piece and a sensor, wherein the gas collecting tube penetrates in the length direction, two ends of the enrichment chamber are connected with the gas collecting tube through pipelines respectively, the pressurizing piece is connected with the gas inlet end of the enrichment chamber, and the sensor is positioned in the enrichment chamber.
When the gas collecting device is used, the gas collecting device is connected to the outside of a sample gas passage of the ion chromatograph such as insulating oil in a sealing way, the gas collecting device is tightly wrapped, if leakage occurs, carrier gas and detected sample gas in the sample gas passage of the ion chromatograph such as insulating oil can overflow into the gas collecting tube, the gas in the gas collecting tube is pressurized by the pressurizing piece and then enters an enrichment chamber to be detected by the sensor, the concentration of the pressurized gas is increased so as to reach the testing range of the sensor, the detection is easier, and the detection precision is improved. The detection gas circuit and the sample gas passage are relatively independent and do not interfere with each other, the gas tightness of the sample gas passage can be detected simultaneously in the working process of the ion chromatograph such as insulating oil, the complex operation of the gas tightness of the conventional chromatograph in shutdown detection is omitted, the time is saved, and the gas in the gas collecting tube is pressurized after long-term accumulation so that the gas is higher than the detection limit of the sensor, the problem that the ion chromatograph such as insulating oil cannot be detected in place due to tiny leakage is solved, and the detection accuracy of the ion chromatograph such as insulating oil is improved.
Preferably, the device further comprises a pressure gauge, and the pressure gauge is connected with the gas collecting tube.
The pressure gauge is used for measuring the pressure in the gas collecting tube, and after vacuumizing the gas collecting tube, the gas which is the same as the carrier gas used by the ion chromatograph such as insulating oil is filled to a negative pressure state, the pressure is measured through the pressure gauge, so that the gas collecting tube is in a micro negative pressure state, and once leakage occurs in a sample gas passage, the sample gas can more easily enter a leakage sample gas collecting system in the micro negative pressure state, and the leakage sample gas can be more easily collected.
Preferably, two ends of the enrichment chamber are respectively connected with the gas collecting tube through a first pipeline and a second pipeline, the first pipeline is connected with a first electromagnetic valve, the second pipeline is connected with a second electromagnetic valve, and the gas inlet is connected with a third electromagnetic valve.
Preferably, the device further comprises an air inlet, wherein the air inlet is connected with the gas collecting pipe or a pipeline between the gas collecting pipe and the enrichment chamber through a third pipeline.
Preferably, the device further comprises a third electromagnetic valve, and the third electromagnetic valve is connected to the third pipeline.
The gas inlet is used for initial vacuumizing, after the vacuumizing is finished, the gas same as the carrier gas in the sample gas passage of the ion chromatograph such as insulating oil is filled into the gas collecting tube, after the sample gas passage is prevented from leaking, the gas in the gas collecting tube enters the sample gas system, the detection result is affected, the detection result is not affected if the gas in the gas collecting tube is the same as the carrier gas, and meanwhile, the gas in the gas collecting tube can isolate oxygen and moisture in the outside air from penetrating into the sample chromatograph, so that the gas collecting tube has a certain protection effect on the sample gas passage.
Preferably, the gas collecting tube is a cylindrical tube, and the gas collecting tube is hermetically sleeved outside a sample gas passage of the ion chromatograph such as insulating oil.
Preferably, the radius distance between the gas collecting tube and the sample gas passage of the ion chromatograph such as insulating oil is 3-10mm.
Preferably, the volume of the gas collecting tube is 10-50 times the volume of the enrichment chamber.
Preferably, the gas collecting tube, the enrichment chamber, the pressurizing piece and the sensor are made of materials which do not adsorb the sample gas to be measured.
The influence of materials on the detected sample gas is reduced, and if the gas collecting tube has the property of adsorbing the detected sample gas, the measurement result is inaccurate.
Preferably, the sensor is an acetylene sensitive sensor.
The dissolved gas in the insulating oil is mainly used for detecting seven gases of methane, acetylene, ethylene, ethane, hydrogen, carbon monoxide and carbon dioxide. Acetylene is a characteristic gas of the discharge fault of the transformer, is a gas which is necessary to be detected when the dissolved gas in the transformer oil is detected, and can be used as a representative component in leakage sample gas of an ion chromatograph such as insulating oil; and acetylene gas is hardly present in the air, so that the detection result of the air tightness detection device is not interfered.
The utility model has the advantages that:
(1) According to the utility model, the sealed gas collecting tube is used for wrapping the sample gas passage of the ion chromatograph such as the insulating oil, if leakage occurs, the carrier gas and the detected sample gas in the sample gas passage of the ion chromatograph such as the insulating oil can overflow into the gas collecting tube, the gas in the gas collecting tube is pressurized by the pressurizing piece and then enters the enrichment chamber to be detected by the sensor, and the concentration of the pressurized gas is increased so as to reach the testing range of the sensor, so that the detection is easier to detect, and the detection precision is improved. The detection gas circuit and the sample gas passage are relatively independent and do not interfere with each other, so that the gas tightness of the sample gas passage can be detected simultaneously in the working process of the ion chromatograph such as insulating oil, the complex operation of the gas tightness of the conventional chromatograph in shutdown detection is omitted, the time is saved, and the gas in the gas collecting tube is pressurized after long-term accumulation so that the gas is higher than the detection limit of the sensor, the problem that the ion chromatograph such as insulating oil cannot be detected in place due to tiny leakage is solved, and the detection accuracy of the ion chromatograph such as insulating oil is improved;
(2) The pressure gauge is used for measuring the pressure in the gas collecting tube, vacuumizing the gas collecting tube, filling the gas which is the same as the carrier gas used by the ion chromatograph such as insulating oil to a negative pressure state, and measuring the pressure by the pressure gauge, so that the gas collecting tube is in a micro negative pressure state, and once leakage occurs in a sample gas passage, the sample gas can more easily enter a leakage sample gas collecting system in the micro negative pressure state, and the leakage sample gas can more easily be collected;
(3) The gas inlet is used for initial vacuumizing, after the vacuumizing is finished, the gas same as the carrier gas in the sample gas passage of the ion chromatograph such as insulating oil is filled into the gas collecting tube, so that the gas in the gas collecting tube enters the sample gas system to influence the detection result after the leakage of the sample gas passage is prevented, the detection result is not influenced when the gas in the gas collecting tube is the same as the carrier gas, and meanwhile, the gas in the gas collecting tube can isolate oxygen and moisture in the outside air from penetrating into the sample chromatograph, so that the sample gas passage has a certain protection effect;
(4) The gas collecting tube, the enrichment chamber, the pressurizing piece and the sensor are made of materials which do not adsorb the measured sample gas, so that the influence of the materials on the measured sample gas is reduced, and the accuracy of the measurement result is improved.
Drawings
FIG. 1 is a schematic diagram of a detection device for detecting the tightness of a sample gas passage of an ion chromatograph such as an insulating oil according to an embodiment of the present utility model;
reference numerals in the drawings:
1. an ion chromatograph sample gas passage such as an insulating oil; 11. a sample injection valve; 12. a chromatographic column; 13. a sample gas conduit; 14. a valve; 15. a detector;
2. a gas collecting tube; 3. an enrichment chamber; 4. a pressurizing member; 5. a sensor; 6. a pressure gauge; 7. an air inlet; 8a, a first electromagnetic valve; 8b, a second electromagnetic valve; 8c, a third electromagnetic valve.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described in the following in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Embodiment one:
the detection device for the air tightness of the sample gas passage of the ion chromatograph such as insulating oil is connected to the outside of the sample gas passage 1 of the ion chromatograph such as insulating oil and is in sealing connection with the outside, can collect, boost and detect leakage air in the sample gas passage 1 of the ion chromatograph such as insulating oil, can also be connected with an external control detection system, records detection results at intervals, and gives an alarm after leakage occurs.
As shown in fig. 1, the sample gas channel 1 of the ion chromatograph such as insulating oil comprises a sample valve 11, a chromatographic column 12, a sample gas pipeline 13, a valve 14 and a detector 15 which are sequentially connected, wherein the sample valve 11 and the detector 15 are connected with two ends of the sample gas pipeline 13, the chromatographic column 12 and the valve 14 are connected to the sample gas pipeline 13, and leakage is easy to occur at the connection part of the sample valve 11 and the sample gas pipeline 13, the connection part of the detector 15 and the sample gas pipeline 13, the connection part of the valve 14 and the connection part of the chromatographic column 12. Therefore, the detection device of the present embodiment covers the entire leak-prone point of the ion chromatograph sample gas passage 1 such as insulating oil. All the sample gas passages are completely sealed and wrapped to form a complete sealed detection device, the connection part of the detection device and the sample gas passage 1 of the ion chromatograph such as insulating oil is sealed by welding, and the air tightness of the detection device is detected by a pressure gauge 6.
The ion chromatograph sample gas passage 1 includes a carrier gas and a sample gas to be measured.
As shown in fig. 1, the detection device for the tightness of the sample gas passage of the ion chromatograph such as insulating oil comprises a gas collecting tube 2, an enrichment chamber 3, a pressurizing element 4, a sensor 5, a pressure gauge 6 and a gas inlet 7; two ends of the enrichment chamber 3 are respectively connected with the gas collecting tube 2 through a first pipeline and a second pipeline, the first pipeline is used as an air inlet tube of the enrichment chamber 3, the second pipeline is used as a return tube of the enrichment chamber 3, the pressurizing piece 4 is connected to the first pipeline, and the sensor 5 is positioned in the enrichment chamber 3; the air inlet 7 is connected with the second pipeline through a third pipeline, and the pressure gauge 6 is connected with the gas collecting pipe 2. The sensor 5 may be connected to an external controller.
Specifically, the gas collecting tube 2 is a cylindrical tube and penetrates through the tube along the length direction, and the distance between the radius of the gas collecting tube 2 and the radius of the sample gas passage 1 of the ion chromatograph such as insulating oil is 3-10mm. If at the chromatographic column 12, the gas collecting tube 2 is flexible and also protrudes outwards, so that the chromatographic column 12 can be wrapped and a certain distance can be reserved between the gas collecting tube and the chromatographic column 12; except for the chromatographic column 12, the gas collection tube 2 has a uniform tube structure. The header 2 is mainly used for collecting leaked gas.
The first pipeline is also connected with a first electromagnetic valve 8a, the second pipeline is connected with a second electromagnetic valve 8b, and the third pipeline is connected with a third electromagnetic valve 8c. When the gas collecting pipe 2 collects the leaked gas, the first electromagnetic valve 8a, the second electromagnetic valve 8b and the third electromagnetic valve 8c are all in a closed state. The use of solenoid valves facilitates automated control.
The volume of the enrichment chamber 3 is smaller than that of the gas collecting tube 2, and specifically, the volume of the gas collecting tube 2 is 10-50 times that of the enrichment chamber. The volume of the pressurized gas is reduced and the volume of the enrichment chamber 3 is therefore smaller. Assuming that the volume and the pressure of the gas collecting tube 2 are V1 and P1 respectively, and the volume and the pressure of the enrichment chamber are V2 and P2 respectively; pv=nrt according to the ideal gas state equation; p1v1=p2v2; after the pressurizing piece 4 pressurizes the sample gas collected by the gas collecting pipe 2, P2 is increased, V2 is reduced, so that the volume of the enrichment chamber 3 is smaller than that of the gas collecting pipe 2; according to moore's law c=n/V; the same amount of sample gas, assuming a concentration enrichment of 10-50 times, requires a volume reduction of at least 10-50 times to reach a concentration that can be detected by the sensor 5.
The detection method of the detection device for the tightness of the sample gas passage of the ion chromatograph such as the insulating oil comprises the following steps:
step 1: the air inlet 7 is used for vacuumizing, so that the purity in the gas collecting tube 2 is maintained, and the influence of other impurity gases is reduced; at this time, the whole detection device is a passage, namely: the first solenoid valve 8a, the second solenoid valve 8b, and the third solenoid valve 8c are all in an open state.
Step 2: then, high-purity gas which is the same as carrier gas used by an ion chromatograph such as insulating oil is filled into the gas collecting tube 2 through the gas inlet 7 to a micro negative pressure state, and the pressure is measured by the pressure gauge 6, so that the micro negative pressure state in the gas collecting tube 2 is ensured; assuming that the gas under normal pressure is 1MPa, the embodiment is filled with 0.8MPa gas, and the gas is measured to be lower than normal pressure by the pressure gauge 6, so that the gas under micro-negative pressure state is more easily entered into the gas collecting tube 2 under micro-negative pressure state once the gas under test leaks, so that the leaked gas is more easily collected;
the high-purity gas filled into the gas collecting tube 2 has the purity higher than 99.999 percent, and the gas purity is higher, so that the detection result of the sample gas is not affected;
step 3: when the gas collecting pipe 2 collects leakage gas, the first electromagnetic valve 8a, the second electromagnetic valve 8b and the third electromagnetic valve 8c are kept in a closed state; after a period of collection, the first electromagnetic valve 8a is opened, the gas in the gas collecting pipe 2 is pressurized through the pressurizing piece 4 and then enters the enrichment chamber 3, the sensor 5 detects the pressurized gas, if the pressurized gas is detected to contain the detected sample gas, leakage occurs, and if the pressurized gas is not detected, leakage does not occur;
if leakage occurs, the external controller sends out a leakage alarm signal; if no leakage occurs, the external controller records the time data, opens the second electromagnetic valve 8b, closes the first electromagnetic valve 8a, returns the pressurized gas to the gas collecting pipe 2, closes the second electromagnetic valve 8b again, and enters the next cycle.
The external controller can control the on-off of the first electromagnetic valve 8a, the second electromagnetic valve 8b and the third electromagnetic valve 8c, keep intermittent collection of the gas collecting tube 2, and collect leakage gas while detecting sample gas.
The embodiment has the following technical effects:
the sealed gas collecting tube 2 wraps the sample gas passage 1 of the ion chromatograph such as insulating oil, if leakage occurs, the carrier gas and the sample gas to be tested in the sample gas passage 1 of the ion chromatograph such as insulating oil can overflow into the gas collecting tube 2, and the gas in the gas collecting tube 2 is pressurized by the pressurizing piece 4. On the one hand, after long-term accumulation, the leakage sample gas in the gas collecting tube 2 is pressurized and enriched to 10-50 times so as to increase the concentration of the detected sample gas to be higher than the detection limit (10) -6 Magnitude) solves the problem that the tiny leakage of the ion chromatograph such as insulating oil is not detected in place, and improves the ion of the insulating oilAccuracy of chromatograph detection.
The gas which is the same as the carrier gas in the sample gas passage 1 of the ion chromatograph such as insulating oil is filled in the gas collecting tube 2, so that after the sample gas passage is prevented from leaking, the gas in the gas collecting tube 2 enters a sample gas system to influence the detection result, the detection result cannot be influenced if the gas is the same as the carrier gas, and meanwhile, the gas in the gas collecting tube 2 can isolate oxygen and moisture in the outside air from penetrating into the sample chromatograph, so that the sample gas passage has a certain protection effect.
The detection gas circuit and the sample gas passage are relatively independent and do not interfere with each other, the gas tightness of the sample gas passage can be automatically detected through the control system in the working process of the ion chromatograph such as insulating oil, the complex operation of the gas tightness of the shutdown detection of the conventional chromatograph is omitted, and the time is saved.
Embodiment two:
in this embodiment, the booster pump is used as the booster member 4 in this embodiment on the basis of the first embodiment.
In this embodiment, the gas collecting tube 2, the enrichment chamber 3, the pressurizing member 4, the sensor 5, the pressure gauge 6, the first pipeline, the second pipeline, the electromagnetic valve, and the like all adopt materials that do not adsorb the sample gas to be measured, so as to reduce the influence of the materials on the sample gas to be measured, and if the gas collecting tube 2 or other materials have the property of adsorbing the sample gas to be measured, the measurement result is inaccurate.
In this embodiment, the transformer discharge fault is detected, and the dissolved gas in the insulating oil mainly detects seven gases of methane, acetylene, ethylene, ethane, hydrogen, carbon monoxide and carbon dioxide. Acetylene is a characteristic gas of the discharge fault of the transformer, is a gas which is necessary to be detected when the dissolved gas in the transformer oil is detected, and can be used as a representative component in the leakage sample gas of an ion chromatograph such as insulating oil; and acetylene gas is hardly present in the air, so that the detection result of the air tightness detection device is not interfered. Therefore, the sample gas to be measured in this embodiment is acetylene, and a high-sensitivity acetylene gas sensor is selected as the sample gas sensor. Therefore, the detection device in this embodiment is made of stainless steel material that does not adsorb acetylene, and the sensor 5 is an acetylene gas sensitive sensor.
It should be noted that: the sensor of other dissolved gases in other oil can be represented by acetylene, acetylene in the dissolved gases in the oil is detected, other gases are not detected, and the sample gas can not be detected when the sample gas leaks.
The embodiment further improves the detection accuracy.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. The detection device is characterized by comprising a gas collecting tube, an enrichment chamber, a pressurizing piece and a sensor, wherein the gas collecting tube penetrates in the length direction, two ends of the enrichment chamber are respectively connected with the gas collecting tube through pipelines, the pressurizing piece is connected with the gas inlet end of the enrichment chamber, and the sensor is positioned in the enrichment chamber.
2. The device for detecting the tightness of a sample gas passage of an insulating oil plasma chromatograph according to claim 1, further comprising a pressure gauge connected to the gas collecting tube.
3. The device for detecting the tightness of the sample gas passage of the ion chromatograph for insulating oil and the like according to claim 1, wherein two ends of the enrichment chamber are respectively connected with the gas collecting tube through a first pipeline and a second pipeline, the first pipeline is connected with a first electromagnetic valve, the second pipeline is connected with a second electromagnetic valve, and the gas inlet of the gas collecting tube is connected with a third electromagnetic valve.
4. The device for detecting the tightness of a sample gas passage of an insulating oil plasma chromatograph according to claim 1, further comprising a gas inlet connected to the gas collecting tube or to a tube between the gas collecting tube and the enrichment chamber through a third tube.
5. The apparatus for detecting tightness of a sample gas path of an insulating oil plasma chromatograph according to claim 4, further comprising a third electromagnetic valve connected to a third pipe.
6. The device for detecting the tightness of the sample gas passage of the ion chromatograph for insulating oil and the like according to claim 1, wherein the gas collecting tube is a cylindrical tube, and the gas collecting tube is hermetically sleeved outside the sample gas passage of the ion chromatograph for insulating oil and the like.
7. The device for detecting the airtightness of the sample gas passage of the ion chromatograph for insulating oil and the like according to claim 1, wherein the distance between the gas collecting tube and the sample gas passage of the ion chromatograph for insulating oil and the like is 3-10mm.
8. The device for detecting the tightness of a sample gas passage of an insulating oil plasma chromatograph according to claim 1, wherein the volume of the gas collecting tube is 10 to 50 times the volume of the enrichment chamber.
9. The device for detecting the tightness of the sample gas passage of the ion chromatograph such as insulating oil and the like according to claim 1, wherein the gas collecting tube, the enrichment chamber, the pressurizing element and the sensor are made of materials which do not adsorb the sample gas to be detected.
10. The device for detecting the tightness of a sample gas passage of an insulating oil plasma chromatograph according to claim 1, wherein the sensor is an acetylene sensitive sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320935678.3U CN219977699U (en) | 2023-04-23 | 2023-04-23 | Sample gas passage air tightness detection device of ion chromatograph such as insulating oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320935678.3U CN219977699U (en) | 2023-04-23 | 2023-04-23 | Sample gas passage air tightness detection device of ion chromatograph such as insulating oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219977699U true CN219977699U (en) | 2023-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320935678.3U Active CN219977699U (en) | 2023-04-23 | 2023-04-23 | Sample gas passage air tightness detection device of ion chromatograph such as insulating oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219977699U (en) |
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2023
- 2023-04-23 CN CN202320935678.3U patent/CN219977699U/en active Active
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