CN113758876A - Gas detection equipment and system in oil - Google Patents
Gas detection equipment and system in oil Download PDFInfo
- Publication number
- CN113758876A CN113758876A CN202111150144.1A CN202111150144A CN113758876A CN 113758876 A CN113758876 A CN 113758876A CN 202111150144 A CN202111150144 A CN 202111150144A CN 113758876 A CN113758876 A CN 113758876A
- Authority
- CN
- China
- Prior art keywords
- oil
- gas
- photoacoustic
- light
- light source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 145
- 239000007789 gas Substances 0.000 claims abstract description 269
- 238000000926 separation method Methods 0.000 claims abstract description 68
- 238000004867 photoacoustic spectroscopy Methods 0.000 claims abstract description 59
- 238000003860 storage Methods 0.000 claims abstract description 38
- 239000012530 fluid Substances 0.000 claims abstract description 32
- 238000009849 vacuum degassing Methods 0.000 claims abstract description 18
- 238000007872 degassing Methods 0.000 claims description 54
- 238000012545 processing Methods 0.000 claims description 29
- 230000005855 radiation Effects 0.000 claims description 25
- 239000001257 hydrogen Substances 0.000 claims description 19
- 229910052739 hydrogen Inorganic materials 0.000 claims description 19
- 238000001834 photoacoustic spectrum Methods 0.000 claims description 19
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 17
- 230000003287 optical effect Effects 0.000 claims description 15
- 230000009977 dual effect Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 12
- 238000001228 spectrum Methods 0.000 abstract description 10
- 230000008859 change Effects 0.000 abstract description 8
- 230000008901 benefit Effects 0.000 abstract description 6
- 238000004817 gas chromatography Methods 0.000 abstract description 6
- 239000012159 carrier gas Substances 0.000 abstract description 5
- 238000010186 staining Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 145
- 210000004027 cell Anatomy 0.000 description 49
- 238000000034 method Methods 0.000 description 15
- 238000005259 measurement Methods 0.000 description 14
- 238000004458 analytical method Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 12
- 230000005284 excitation Effects 0.000 description 12
- 238000013461 design Methods 0.000 description 11
- 239000007788 liquid Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 239000012528 membrane Substances 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- 238000012806 monitoring device Methods 0.000 description 5
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- HSFWRNGVRCDJHI-UHFFFAOYSA-N Acetylene Chemical compound C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 3
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000003745 diagnosis Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-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
- 239000005083 Zinc sulfide Substances 0.000 description 2
- 238000004847 absorption spectroscopy Methods 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 2
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 238000010895 photoacoustic effect Methods 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910052984 zinc sulfide Inorganic materials 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 1
- 229910005542 GaSb Inorganic materials 0.000 description 1
- GPXJNWSHGFTCBW-UHFFFAOYSA-N Indium phosphide Chemical compound [In]#P GPXJNWSHGFTCBW-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 235000013405 beer Nutrition 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 239000010724 circulating oil Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- VTGARNNDLOTBET-UHFFFAOYSA-N gallium antimonide Chemical compound [Sb]#[Ga] VTGARNNDLOTBET-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 230000009385 viral infection Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/1702—Systems in which incident light is modified in accordance with the properties of the material investigated with opto-acoustic detection, e.g. for gases or analysing solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/34—Purifying; Cleaning
-
- 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
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The utility model relates to a gas detection equipment in fluid, system, external oil storage equipment is connected to oil-gas separation device, can carry out vacuum degassing after the fluid of external oil storage equipment flows into oil-gas separation device, obtains the gas of dissolving in the fluid, and the fluid that will degas simultaneously and accomplish is carried back the main tank, non-staining fluid, and does not consume the fluid in the external oil storage equipment. When gas in oil is analyzed, the double-light-source photoacoustic spectrometry detection device can be used for performing photoacoustic spectrometry detection by combining laser and black light, so that concentration parameters of different characteristic gases in the gas are obtained and returned to the main control device. Through this kind of scheme, adopt laser-black body light to combine optoacoustic spectrum detection technology, not only need not carry out gas chromatography's similar carrier gas, chromatographic column and change, can adopt different light sources to carry out optoacoustic spectrum to detect to the characteristic gas of different grade type moreover to the concentration detection of multiple characteristic gas is carried out to the accuracy, has the advantage that detects the high reliability.
Description
Technical Field
The application relates to the technical field of gas detection, in particular to gas detection equipment and a gas detection system in oil.
Background
The transformer oil is a mineral oil obtained by distillation and refining of natural petroleum, and is a mixture of pure, stable, low-viscosity, good-insulation and good-cooling liquid natural hydrocarbons obtained by acid-base refining of lubricating oil fractions in the petroleum. The transformer oil has good insulating property, heat radiation performance and arc extinction function, and is widely applied to power industries such as power plants and substations to ensure stable and safe operation of a transformer system.
Analysis of dissolved gases in transformer oil can be used for limited diagnosis of early failure hidden dangers in the transformer, is the most common means for online monitoring of the transformer, and forms an internationally recognized series of standards. The traditional transformer oil detection mainly adopts a gas chromatography method, a photoacoustic spectrometry method, a fuel cell method and the like. However, gas chromatography requires periodic replacement of the carrier gas and replacement of the chromatography column, which requires a large amount of maintenance; the fuel cell method can only detect the concentration of mixed combustible gas in the transformer oil, and can not identify the concentration of single gas components; the photoacoustic spectroscopy device is limited to only adopting a blackbody light source technology, the detection precision is not high enough, and the failure rate is high when the sampling frequency is high. Therefore, the traditional transformer oil detection method has the defect of poor detection reliability.
Disclosure of Invention
Therefore, it is necessary to provide an oil gas detection device and system for solving the problem of poor detection reliability of the conventional transformer oil detection method.
An oil gas detection apparatus comprising: the oil-gas separation device is connected with the external oil storage equipment and is used for performing vacuum degassing on oil flowing from the external oil storage equipment and then injecting the oil back to the external oil storage equipment; the double-light-source photoacoustic spectrum detection device is connected with the oil-gas separation device and is used for performing photoacoustic spectrum detection on the gas subjected to vacuum degassing by the oil-gas separation device through laser and black light to obtain concentration parameters of gases with different characteristics in the gas; the main control device is connected with the oil-gas separation device and the double-light-source photoacoustic spectrum detection device and used for controlling the operation of the oil-gas separation device and the double-light-source photoacoustic spectrum detection device and acquiring concentration parameters of different characteristic gases in the gas when receiving a starting signal.
In one embodiment, the oil-gas separation device comprises a vacuum pump, a degassing assembly, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, an oil inlet pipeline, an oil return pipeline, a gas collection pipeline and a vacuum pipeline; the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the degassing assembly and the vacuum pump are respectively connected with the main control device; the degassing assembly is connected with external oil storage equipment through the oil inlet pipeline and the oil return pipeline respectively, the first electromagnetic valve is arranged on the oil inlet pipeline, and the second electromagnetic valve is arranged on the oil return pipeline; the degassing assembly is connected with the double-light-source photoacoustic spectrum detection device through the gas collection pipeline, and the fourth electromagnetic valve is arranged on the gas collection pipeline; the vacuum pump is connected to one end, close to the dual-light-source photoacoustic spectrometry detection device, of the fourth electromagnetic valve through the vacuum pipeline, and the third electromagnetic valve is arranged on the vacuum pipeline.
In one embodiment, the degassing assembly comprises a degassing cavity, an oil cylinder, a motor and a connecting pipeline; the degassing cavity is connected with external oil storage equipment through the oil inlet pipeline and the oil return pipeline respectively, the degassing cavity is connected with the double-light-source photoacoustic spectrum detection device through the gas collection pipeline, and the degassing cavity is connected with the oil cylinder through the connecting pipeline; the motor is connected with the oil cylinder and used for driving the piston of the oil cylinder to move, and the motor is connected with the main control device.
In one embodiment, the oil-gas separation device further comprises a quantifying pipe and a six-way valve, the quantifying pipe is arranged on the gas collecting pipeline, and the gas collecting pipeline is connected with the dual-light-source photoacoustic spectrometry detection device through the six-way valve.
In one embodiment, the dual-light-source photoacoustic spectroscopy detection apparatus comprises an infrared thermal radiation light source assembly, a distributed feedback laser light source assembly, a photoacoustic cell and a photoacoustic signal processing assembly; the infrared thermal radiation light source assembly, the distributed feedback type laser light source assembly and the photoacoustic signal processing assembly are respectively connected with the main control device, the photoacoustic cell is connected with the oil-gas separation device, and the photoacoustic signal processing assembly is arranged in the photoacoustic cell; when the infrared thermal radiation light source component and the distributed feedback type laser light source component respectively emit exciting light to the photoacoustic cell, the photoacoustic signal processing component respectively analyzes photoacoustic signals generated after the exciting light is absorbed by the characteristic gases to obtain concentration parameters of the characteristic gases.
In one embodiment, the infrared thermal radiation light source assembly comprises an infrared light source, a chopper and at least one optical filter, wherein the infrared light source and the chopper are respectively connected with the main control device, the chopper is connected with the infrared light source, and the optical filter is arranged between the chopper and the photoacoustic cell.
In one embodiment, the photoacoustic signal processing assembly comprises a microphone, a photoacoustic signal demodulator, an amplifier and a signal processor, the microphone is arranged on the photoacoustic cell, the microphone is connected with the photoacoustic signal demodulator, the photoacoustic signal demodulator is connected with the amplifier, the amplifier is connected with the signal processor, and the signal processor is connected with the main control device.
In one embodiment, the photoacoustic cell is a non-resonant photoacoustic cell.
In one embodiment, the dual-light-source photoacoustic spectrometry detection apparatus further comprises a constant temperature device, and the infrared thermal radiation light source assembly, the distributed feedback laser light source assembly, the photoacoustic cell, and the photoacoustic signal processing assembly are disposed inside the constant temperature device.
In one embodiment, the constant temperature device is provided with an air inlet and an air outlet, and the dual-light-source photoacoustic spectrometry detection device further comprises a filter, a first three-way valve, an air inlet valve, an air outlet valve, an air pump, a second three-way valve and a hydrogen detector; the filter the first three-way valve the admission valve the air outlet valve the air pump the second three-way valve with the hydrogen detector all set up in constant temperature equipment's inside, oil-gas separation device passes through the air inlet is connected the filter, the filter is connected first three-way valve, first three-way valve connection the admission valve, the admission valve is connected the optoacoustic pond, the optoacoustic pond is connected the air outlet valve, the air outlet valve is connected the air pump, the air pump is connected oil-gas separation device, oil-gas separation device connects the second three-way valve, first three-way valve connection the second three-way valve, the second three-way valve is connected the hydrogen detector, the warp the gaseous follow after the hydrogen detector detects the gas outlet is discharged.
In one embodiment, the oil gas detection device further comprises a first switching power supply and a second switching power supply, the first switching power supply is connected with the main control device, and the oil gas separation device and the dual-light-source photoacoustic spectroscopy detection device are respectively connected with the second switching power supply.
In one embodiment, the oil gas detection device further comprises a cabinet body, and the oil gas separation device, the dual-light-source photoacoustic spectroscopy detection device and the main control device are all arranged inside the cabinet body.
In one embodiment, the oil gas detection device further comprises a display device, the display device is arranged on the outer surface of the cabinet body, and the display device is connected with the main control device.
The utility model provides a gas detection system in fluid, includes host computer and foretell fluid gas detection equipment, master control set connects the host computer.
Above-mentioned gas detection equipment in fluid, system, external oil storage equipment are connected to oil-gas separation device, can carry out vacuum degassing after the fluid of external oil storage equipment flows into oil-gas separation device, obtain the gas of dissolving in the fluid, carry the fluid of accomplishing with degassing simultaneously back to the main oil tank, non-staining fluid, and do not consume the fluid in the external oil storage equipment. When gas in oil is analyzed, the double-light-source photoacoustic spectrometry detection device can be used for performing photoacoustic spectrometry detection by combining laser and black light, so that concentration parameters of different characteristic gases in the gas are obtained and returned to the main control device. Through this kind of scheme, adopt laser-black body light to combine optoacoustic spectrum detection technology, not only need not carry out gas chromatography's similar carrier gas, chromatographic column and change, can adopt different light sources to carry out optoacoustic spectrum to detect to the characteristic gas of different grade type moreover to the concentration detection of multiple characteristic gas is carried out to the accuracy, has the advantage that detects the high reliability.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a gas detection device in oil in one embodiment;
FIG. 2 is a schematic diagram of the principles of photoacoustic spectroscopy in one embodiment;
FIG. 3 is a schematic view of the oil-gas separation device in one embodiment;
FIG. 4 is a schematic structural diagram of a dual-light-source photoacoustic spectroscopy apparatus according to an embodiment;
FIG. 5 is a schematic structural diagram of a dual-light-source photoacoustic spectroscopy detection apparatus in another embodiment;
FIG. 6 is a diagram illustrating an embodiment of a photoacoustic cell illuminated by excitation light;
FIG. 7 is a schematic structural diagram of a dual-light-source photoacoustic spectroscopy detection apparatus according to yet another embodiment;
FIG. 8 is a schematic diagram of an embodiment of an optical path structure of a dual-light-source photoacoustic spectroscopy detection apparatus;
FIG. 9 is a schematic diagram of an air path structure of a dual-light-source photoacoustic spectroscopy detection apparatus in another embodiment;
FIG. 10 is a schematic diagram of a detection sequence for gas in oil in one embodiment;
FIG. 11 is a schematic view of a gas detection device in oil in another embodiment;
FIG. 12 is a schematic view showing the structure of a gas detection device in oil in yet another embodiment;
FIG. 13 is a diagram illustrating a display interface of a display device according to an embodiment;
FIG. 14 is a schematic diagram of a display interface of the display device according to another embodiment;
FIG. 15 is a schematic view showing the structure of a gas detection device in oil in still another embodiment;
FIG. 16 is a diagram illustrating an embodiment of a host computer interface.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Referring to fig. 1, an apparatus for detecting gas in oil includes: the oil-gas separation device 10 is connected with external oil storage equipment, and is used for vacuum degassing of oil flowing from the external oil storage equipment and then reinjecting the oil to the external oil storage equipment; the double-light-source photoacoustic spectrum detection device 20 is connected with the oil-gas separation device 10 and is used for performing photoacoustic spectrum detection on the gas subjected to vacuum degassing of the oil-gas separation device 10 through laser and black light to obtain concentration parameters of gases with different characteristics in the gas; and the main control device 30 is connected with the oil-gas separation device 10 and the dual-light-source photoacoustic spectrum detection device 20, and is used for controlling the operation of the oil-gas separation device 10 and the dual-light-source photoacoustic spectrum detection device 20 and acquiring concentration parameters of gases with different characteristics in the gases when receiving a starting signal.
Specifically, the oil-gas separation device 10 mainly separates gas dissolved in oil liquid so as to detect the concentration of each characteristic gas contained in the gas. The types of the characteristic gases in the gases dissolved in the oil liquid are not unique, and the types of the characteristic gases dissolved in the oil liquid can be distinguished in different application scenes. For example, in one embodiment, the characteristic gas may be CO (carbon monoxide), CO2(carbon dioxide), CH4(methane), C2H2(acetylene) C2H4(ethylene) C2H6(ethane) and micro water.
In the scheme of this embodiment, oil sample collection is circulating oil working method, and the oil sample that has analyzed reinjects outside oil storage equipment, can satisfy not polluting oil, and the circulating sampling does not consume the fluid that becomes outside oil storage equipment. The oil-gas separation device 10 extracts gas dissolved in oil liquid in a vacuum state, and sends the collected gas sample to the double-light-source photoacoustic spectrometry detection device 20 for analysis.
The photoacoustic spectrometry is an indirect absorption spectrometry measuring method, which converts absorbed light energy into sound pressure wave signals according to the photoacoustic effect of gas, and then detects the sound wave signals by using a microphone so as to measure the concentration of the gas. The direct measurement process does not exist in the process, so that the photoacoustic spectroscopy method can realize higher limit detection sensitivity. The photoacoustic spectroscopy trace gas detection technology is an indirect absorption spectroscopy technology, and the schematic diagram of the principle is shown in fig. 2. Incident light of a light source is absorbed by characteristic gas, different gas molecules have selective absorption for light with different wavelengths, and therefore, the absorption lines of the gas can be scanned by using incident light with narrow line width. The gas absorbs the light energy to transition to a high energy level and returns to a low energy level through a radiationless transition process, in which the light energy is mainly converted into heat energy, causing the volume change of the gas. If the incident light is periodically modulated, a periodic pressure variation, i.e. a photoacoustic signal, will be generated within the photoacoustic cavity. The acoustic pressure signal is picked up by a microphone, and the gas concentration value can be inverted according to the coefficient obtained by calibration.
In the scheme of this embodiment, the light source that adopts during the photoacoustic spectroscopy detects has two kinds, is laser and black body light respectively, and laser can be used for carrying out the concentration detection of the characteristic gas that is easily disturbed in the gas that vacuum degassing obtained, and black body light is used for carrying out the concentration detection of other gases, and then guarantees the accuracy to the concentration parameter of each characteristic gas that obtains to effectively improve and detect the precision. The operation of the oil-gas separation device 10 and the operation of the dual-light-source photoacoustic spectrometry detection device 20 are both performed under the control of the main control device 30, so that the conditions are basically constant, and the degassing rate repeatability is good.
It should be noted that in one embodiment, the master control device 30 is also provided with a fault analysis function. That is, after the main control device 30 obtains the concentration parameters of each characteristic gas, further analysis and processing can be performed, so that the latent fault of the external oil storage device can be diagnosed, and the potential fault hazard of the external oil storage device can be pre-warned. The specific type of the external oil storage equipment is not unique, and the corresponding external oil storage equipment can be distinguished according to different application scenes of the gas detection equipment in oil. For example, in one embodiment, when the gas detection device is used in a substation, the external oil storage device may be a transformer, and the corresponding oil is transformer oil.
It is to be understood that the specific configuration of the oil-gas separation device 10 is not exclusive, as long as it is capable of vacuum degassing of dissolved gases in the oil. For example, in one embodiment, referring to fig. 3, the oil-gas separation device 10 includes a vacuum pump 11, a degassing assembly 60, a first solenoid valve V1, a second solenoid valve V2, a third solenoid valve V3, a fourth solenoid valve V4, an oil inlet line 15, an oil return line 16, an air collection line 18, and a vacuum line 19; the first electromagnetic valve V1, the second electromagnetic valve V2, the third electromagnetic valve V3, the fourth electromagnetic valve V4, the degassing assembly 60 and the vacuum pump 11 are respectively connected with a main control device 30 (not shown); the degassing assembly 60 is connected with external oil storage equipment through an oil inlet pipeline 15 and an oil return pipeline 16 respectively, a first electromagnetic valve V1 is arranged on the oil inlet pipeline 15, and a second electromagnetic valve V2 is arranged on the oil return pipeline 16; the degassing assembly 60 is connected with the dual-light-source photoacoustic spectrometry detection device 20 through the gas collecting pipeline 18, and the fourth electromagnetic valve V4 is arranged on the gas collecting pipeline 18; the vacuum pump 11 is connected to one end of a fourth electromagnetic valve V4 close to the dual-light-source photoacoustic spectrometry detection device 20 through a vacuum pipeline 19, and a third electromagnetic valve V3 is arranged on the vacuum pipeline 19.
Specifically, according to the scheme of this embodiment, when the first electromagnetic valve V1 is opened, the oil-gas separation device 10 flows into the degassing assembly 60, and then only needs to close the first electromagnetic valve V1 and the second electromagnetic valve V2, open the third electromagnetic valve V3 and the fourth electromagnetic valve V4, and start the vacuum pump 11 to operate, so that the degassing assembly 60 can be vacuumized. According to Henry's law, a certain amount of gas is dissolved in a liquid at a certain temperature and pressure, and when the temperature is increased or the pressure is decreased, the amount of the dissolved gas in the liquid is reduced; conversely, as the temperature decreases or the pressure increases, the amount of dissolved gas in the liquid will increase. The vacuum pump 11 evacuates the degassing assembly 60 to reduce the pressure thereof without changing the oil temperature, thereby removing gas from the oil in the degassing assembly 60. Finally, the vacuum pump 11 is only needed to be closed, and the fourth electromagnetic valve V4 is opened, so that the separated gas can be input into the dual-light-source photoacoustic spectrometry detection apparatus 20 through the gas collection pipeline 18 for analysis.
It is to be understood that the particular type of degas assembly 60 is not exclusive and in a more detailed embodiment, referring to fig. 3, degas assembly 60 includes degas chamber 13, cylinder 14, motor 12 and connecting line 17; the degassing cavity 13 is connected with external oil storage equipment through an oil inlet pipeline 15 and an oil return pipeline 16 respectively, the degassing cavity 13 is connected with a double-light-source photoacoustic spectrum detection device 20 through a gas collection pipeline 18, and the degassing cavity 13 is connected with an oil cylinder 14 through a connecting pipeline 17; the motor 12 is connected with the oil cylinder 14 and is used for driving the piston of the oil cylinder 14 to move, and the motor 12 is connected with a main control device 30 (not shown)
Specifically, the scheme of this embodiment utilizes supporting uses such as vacuum pump 11, hydro-cylinder 14 and solenoid valve, realizes the vacuum degassing operation to fluid, through the drive of hydro-cylinder 14 and motor 12, can further accelerate fluid entering degasification subassembly 60 to and further improve the efficiency that degasification subassembly carried out the degasification, this oil-gas separation device 10 part simple structure, components and parts are less, and gas circuit and oil circuit are connected simply, simplify installation and debugging technology, reduce the fault point, and the operational reliability is higher.
Based on the oil-gas separation device 10 in this embodiment, the operation is divided into three parts, one of which is an oil inlet link, namely, oil in the external oil storage device is extracted into the oil-gas separation device 10, the other is a degassing link, namely, gas dissolved in the extracted oil is subjected to vacuum extraction, and the other is a sample introduction link, namely, the gas obtained after vacuum degassing is conveyed to the rear-end dual-light-source photoacoustic spectrometry detection device 20 for subsequent analysis.
In the oil inlet link, the main control device 30 firstly controls the first electromagnetic valve V1 to open, and at the same time controls the motor 12 to start operation, and under the driving of the motor 12, the piston in the oil cylinder 14 moves to enable the oil to flow into the degassing cavity 13 from the oil inlet pipeline 15. It will be appreciated that the direction of movement of the piston in the cylinder 14 is not exclusive, for example, with reference to figure 3, when the connection 17 to the cylinder 14 is at the left side of the cylinder 14, the master control 30 will control the piston to move to the right. When the degassing cavity 13 is full of oil, the main control device 30 controls the first electromagnetic valve V1 to be closed and the second electromagnetic valve V2 to be opened, and controls the motor 12 to drive the piston of the oil cylinder 14 to move so as to compress and discharge the oil in the oil cylinder 14 from the connecting pipeline 17, until the oil in the oil cylinder 14 is completely discharged, and then closes the second electromagnetic valve V2. Similarly, in the embodiment shown in fig. 3, when the master control device 30 controls the piston to move to the left, the oil in the cylinder 14 is completely discharged, i.e., the piston moves to the leftmost end. Then, in the state that the first electromagnetic valve V1 is opened and the second electromagnetic valve V2 is closed, the main control device 30 returns to the operation of just starting to control the piston to move so as to enable the oil to enter the degassing cavity 13, and the operation is executed in a circulating manner until the oil is sufficiently circulated.
It should be noted that the number of cycles in the oil feed stage is not exclusive and may be selected differently depending on the capacity of the cylinder 14, degassing chamber 13 and the type of the respective lines. For example, in a more detailed embodiment, the volumes of the oil cylinder 14 and the degassing cavity 13 are both 200mL, the pipeline used in the oil-gas separation device 10 is an oil pipe with a length of 80 m, an outer diameter of 6mm and an inner diameter of 4mm, and when the oil circulation volume needs to be 1L, the circulation time can be set to 5 times, so as to ensure that the oil circulation is sufficient.
When the oil is sufficiently circulated, the main control device 30 closes the first solenoid valve V1 and the second solenoid valve V2 to enter the degassing link. In the process, the main control device 30 controls the fourth electromagnetic valve V4, the third electromagnetic valve V3 and the vacuum pump 11 to start operation, the vacuum pump 11 is used for vacuumizing the degassing cavity 13, and after the vacuum degree is greater than a preset value (the specific size is not unique, and different settings can be performed in combination with actual scenes, for example, the setting can be-90 kPa), the vacuum pump 11 and the fourth electromagnetic valve V4 are turned off. Then the main control device 30 controls the motor 12 to drive the piston of the cylinder 14 to operate, specifically, referring to fig. 3 in combination, at this time, the piston first operates from left to right, after waiting for a period of time (the specific size is set differently according to the actual conditions), the piston is controlled to operate from right to left, and after waiting for a period of time (the specific size is set differently according to the actual conditions), primary degassing is completed. Likewise, this process may need to be performed in cycles (e.g., five times, etc.) in order to ensure adequate degassing.
And after the degassing is finished, entering a sample injection link. In the process, firstly, the oil sample in the oil-gas separation device 10 is kept still for a period of time, then the master control device 30 controls the fourth electromagnetic valve V4 to be opened, and simultaneously the third electromagnetic valve V3 is closed, so that the gas obtained by vacuum degassing can be conveyed to the dual-light-source photoacoustic spectrometry detection device 20 from the gas collection pipeline 18 for analysis, and after the sample introduction is completed, the fourth electromagnetic valve V4 is closed.
It should be noted that to ensure that the monitoring device meets the predetermined specifications, the degassing technique must meet the following key specifications: an oil return mode is adopted, and the degassing process has no pollution to oil liquid of external oil storage equipment; degassing time is less than 40 min; the degassing rate is more than 90 percent; degassing efficiency of the gas with the same component characteristic is consistent under different oil sample concentrations, and deviation is less than 10%; the repeatability RSD of the gas with the same component characteristic is less than 2 percent under the same oil sample concentration; the average annual degassing efficiency variation is less than 5 percent; the removed sample gas reduces oil vapor as much as possible; the reliable working times of the oil-gas separation device 10 are more than 2000 (5 years, 1 time per day); the life of the degasser is more than 8 years.
In one embodiment, the oil-gas separation device 10 further includes a quantitative pipe and a six-way valve, the quantitative pipe is disposed on the gas collecting pipeline 18, and the gas collecting pipeline 18 is connected to the dual-light-source photoacoustic spectroscopy detection device 20 through the six-way valve.
Specifically, in the scheme of this embodiment, the gas collecting pipeline 18 is further provided with a quantitative pipe, and after the oil is subjected to vacuum degassing to obtain gas, the gas is conveyed to the quantitative pipe for quantification, and then the gas is conveyed to the dual-light-source photoacoustic spectroscopy detection apparatus 20 for analysis by the six-way valve, so that the proportion of the characteristic gas removed each time is the same, and the accuracy of the data is ensured.
The specific structure of the dual-light source photoacoustic spectroscopy detection apparatus 20 is not exclusive, and in a more detailed embodiment, referring to fig. 4, the dual-light source photoacoustic spectroscopy detection apparatus 20 includes an infrared thermal radiation light source assembly 21, a distributed feedback laser light source assembly 22, a photoacoustic cell 23, and a photoacoustic signal processing assembly 24; the infrared heat radiation light source component 21, the distributed feedback type laser light source component 22 and the photoacoustic signal processing component 24 are respectively connected with the main control device 30, the photoacoustic cell 23 is connected with the oil-gas separation device 10, and the photoacoustic signal processing component 24 is arranged in the photoacoustic cell 23; when the infrared thermal radiation light source module 21 and the distributed feedback type laser light source module 22 respectively emit excitation light to the photoacoustic cell 23, the photoacoustic signal processing module 24 respectively analyzes photoacoustic signals generated after the characteristic gases absorb the excitation light, and concentration parameters of the characteristic gases are obtained.
Specifically, in the solution of the present embodiment, the adopted laser is emitted through the distributed feedback laser light source assembly 22, and the adopted black body light source is specifically infrared light, and is emitted to the photoacoustic cell 23 through the infrared thermal radiation light source assembly 21. The Distributed Feedback Laser light source module 22 is a light source module using a Distributed Feedback Laser as a Laser emitting device, and a Distributed Feedback Laser (DFB) has a Bragg Grating (Bragg Grating) built therein and belongs to a side emitting semiconductor Laser. The DFB laser mainly uses semiconductor materials as media, including gallium antimonide (GaSb), gallium arsenide (GaAs), indium phosphide (InP), zinc sulfide (ZnS), and the like. The DFB laser has the greatest characteristics of excellent monochromaticity (namely spectral purity), the line width of the DFB laser can be generally within 1MHz, and the DFB laser has very high Side Mode Suppression Ratio (SMSR) which can be up to more than 40-50 dB.
After the oil-gas separation device 10 finishes degassing, the main control device 30 issues a work instruction to the dual-light-source photoacoustic spectrometry detection device 20 through an RS485 communication bus (or other types of communication modes), and the dual-light-source photoacoustic spectrometry detection device 20 starts to work. The excitation light emitted from the infrared heat radiation light source assembly 21 enters the non-resonant photoacoustic cell 23. On the other hand, the laser light emitted from the distributed feedback laser light source module 22 can also be irradiated to the photoacoustic cell 23. The gas generated by the oil-gas separation device 10 is delivered to the photoacoustic cell 23, in the photoacoustic cell 23, the gas molecular characteristics absorb the excitation light to generate corresponding photoacoustic signals, the photoacoustic signals are detected by the photoacoustic signal processing assembly 24, and finally, the concentration of the gas with the corresponding characteristics in the photoacoustic cell 23 is obtained through individual analysis and calculation.
It should be noted that the specific structure of the infrared heat radiation light source assembly 21 is not exclusive, and in one embodiment, referring to fig. 5 in combination, the infrared heat radiation light source assembly 21 includes an infrared light source 211, a chopper 212, and at least one optical filter 213, the infrared light source 211 and the chopper 212 are respectively connected to the main control device 30, the chopper 212 is connected to the infrared light source 211, and the optical filter 213 is disposed between the chopper 212 and the photoacoustic cell 23.
Specifically, in the present embodiment, the optical filter 213+ the infrared light source 211 is adopted to emit excitation light to the photoacoustic cell 23, under the control of the main control device 30, the infrared light source 211 is turned on, light emitted by the infrared light source 211 passes through the chopper 212 to become an excitation light source periodically modulated at a specific frequency, and the light source filters out infrared excitation light with a specific central wavelength and a specific bandwidth after passing through the optical filter 213, and enters the non-resonant photoacoustic cell 23. The detection is carried out by using laser as exciting light for the characteristic gas of the type susceptible to interference, and other types of characteristic gases (such as CO, CO)2、C2H4、C2H6Etc.) is detected by the excitation light generated by the filter 213+ the infrared light source 211.
Because the spectrum of the infrared thermal radiation light source covers the wavelength range of 1-15 μm, and the gas to be measured has a strong absorption spectrum line in the spectral range, the infrared thermal radiation light source assembly 21 is selected as the excitation light source in the embodiment. In a more detailed embodiment, the infrared light source 211 is provided with a mirror, the diverging light of the infrared light source 211 is reflected by the mirror into the photoacoustic cell 23, and the filter 213 is used to filter the broad spectrum light of the infrared light source 211 into narrow band light corresponding to a single gas absorption band, so that one filter 213 can be provided for each characteristic gas. The modulated excitation light enters the photoacoustic cell 23 system through the optical filter 213, and generates an acoustic wave signal with the same frequency as the modulation signal, and the acoustic wave signal is received by the photoacoustic signal processing assembly 24, and the detailed information of the photoacoustic signal is obtained through signal processing.
Referring to fig. 5, the distributed feedback laser light source module 22 includes at least two distributed feedback lasers, each distributed feedback laser is connected to the main control device 30, and is started to operate under the control of the main control device 30, and excitation light emitted by each distributed feedback laser can irradiate the photoacoustic cell 23, so as to achieve the detection of the concentration parameter of the feature gas of the type susceptible to interference.
Referring to fig. 5, in a more detailed embodiment, the photoacoustic signal processing assembly 24 includes a microphone 241, a photoacoustic signal demodulator 242, an amplifier 243 and a signal processor 244, the microphone 241 is disposed in the photoacoustic cell 23, the microphone 241 is connected to the photoacoustic signal demodulator 242, the photoacoustic signal demodulator 242 is connected to the amplifier 243, the amplifier 243 is connected to the signal processor 244, and the signal processor 244 is connected to the main control device 30.
Specifically, the infrared light source 211 is modulated in intensity by the chopper 212, then filtered by the specific optical filter 213, and then enters the photoacoustic cell 23, and is absorbed by the gas inside the cell to generate a photoacoustic signal having the same frequency as the modulation signal, and the microphone 241 is triggered to perform sampling to obtain a photoacoustic signal having the same frequency as the modulation frequency. Or the laser light source is modulated by sine wave and sawtooth wave, then enters the photoacoustic cell 23 and is absorbed by the gas inside the cell to generate photoacoustic signals with double modulation frequency, an amplifier 243 integrated in the photoacoustic signal processing assembly 24 synchronously collects sine modulation frequency double frequency sampling, and double frequency photoacoustic signals, namely second harmonic signals, are collected. The signal processor 244 then performs further processing operations on the photoacoustic signals to finally obtain concentration parameters corresponding to each characteristic gas.
It will be appreciated that in one embodiment, the microphone 241 is embodied as an electret microphone. The electret microphone comprises two parts of sound-electricity conversion and impedance conversion, wherein the key element of the sound-electricity conversion is an electret vibrating membrane which is an extremely thin plastic membrane, a layer of metal film is evaporated on one surface of the membrane, then the membrane is electret by a high-voltage electric field, opposite charges are respectively stored on the two surfaces of the membrane, and the evaporated surface of the membrane faces outwards and is communicated with a metal shell. In the electret microphone, a field effect transistor is used for pre-amplification, so that the electret microphone needs a certain bias voltage when working normally, and the bias voltage is not more than 10V under the general condition. The amplifier 243 specifically includes a pre-amplifier 243 and a phase-locked amplifier 243, and after the electret microphone collects the photoacoustic signal, the photoacoustic signal is sequentially processed by the photoacoustic signal demodulator 242, the pre-amplifier 243 and the phase-locked amplifier 243, and then is finally transmitted to the signal processor 244 for further processing and analysis, so as to obtain the concentration parameter of the gas with the corresponding characteristic.
Further, in one embodiment, the photoacoustic cell 23 is a non-resonant photoacoustic cell 23. Since the infrared heat radiation light source module 21 used in the above embodiment emits light having a relatively large beam diameter and inevitably irradiates the cell wall of the photoacoustic cell 23, and if the resonant photoacoustic cell 23 is used, the cell wall is absorbed to cause relatively large noise interference, and thus the photoacoustic spectroscopy module employs the non-resonant photoacoustic cell 23. In addition, the present application uses an infrared light source 211-laser light source combined light source, light emitted by the infrared light source 211 is incident from the axial direction of the photoacoustic cell 23, and the laser light source is selected to be incident obliquely from the side wall, so that multiple reflections from the side wall are formed to improve the absorption range, according to the lambert beer law, the strength of the photoacoustic signal can be improved by improving the absorption range, and the combined light source incident scheme can be combined with fig. 6. Meanwhile, the electret microphone has good low-frequency response, high sensitivity and good stability, and is suitable for being matched with the application of the non-resonant photoacoustic cell 23 in the embodiment.
Referring to fig. 7, in an embodiment, the dual-light-source photoacoustic spectroscopy apparatus 20 further includes a constant temperature device 25, and the infrared thermal radiation light source assembly 21, the distributed feedback laser light source assembly 22, the photoacoustic cell 23 and the photoacoustic signal processing assembly 24 are disposed inside the constant temperature device 25.
Specifically, the change in temperature has a great influence on the detection accuracy of the dual-light-source photoacoustic spectroscopy detection apparatus 20, and on the one hand, the change in temperature may cause the output wavelength of the distributed feedback laser to drift, which affects the detection result. On the other hand, temperature changes also have a large influence on the generation of the photoacoustic effect. Therefore, in the scheme of this embodiment, a thermostat 25 is further provided, and the infrared heat radiation light source assembly 21, the distributed feedback laser light source assembly 22, the photoacoustic cell 23, and the photoacoustic signal processing assembly 24 are disposed inside the thermostat 25, so as to further ensure the accuracy of the detection result.
It should be noted that the specific structure of the thermostat 25 is not exclusive, and in a more detailed embodiment, the thermostat 25 includes a box, a temperature controller, a heater, and a temperature sensor, wherein the temperature controller is a core unit, and is controlled by a single chip microcomputer and an optimized PID algorithm, so as to ensure that the thermostat temperature is within ± 0.1 ℃ of the set temperature, the heating unit employs 2 60-watt heating rods, and the temperature sensor employs a thermocouple. The scheme can realize constant temperature control in the box body, ensures that the equipment can normally work under various severe environment conditions of high temperature, high humidity and low temperature, completely avoids the influence of the environment, and ensures the accuracy, the repeatability and the stability of gas detection.
Referring to fig. 8, in an embodiment, the constant temperature device 25 has an air inlet and an air outlet, and the dual-light source photoacoustic spectroscopy detection apparatus 20 further includes a filter 41, a first three-way valve 42, an air inlet valve 43, an air outlet valve 44, an air pump 45, a second three-way valve 46, and a hydrogen detector 47; filter 41, first three-way valve 42, admission valve 43, air outlet valve 44, air pump 45, second three-way valve 46 and hydrogen detector 47 all set up in the inside of constant temperature equipment 25, oil gas separation device 10 passes through the air inlet and connects filter 41, first three-way valve 42 is connected to filter 41, admission valve 43 is connected to first three-way valve 42, admission valve 43 connects optoacoustic cell 23, optoacoustic cell 23 connects air outlet valve 44, air outlet valve 44 connects air pump 45, air pump 45 connects oil gas separation device 10, oil gas separation device 10 connects second three-way valve 46, first three-way valve 42 connects second three-way valve 46, second three-way valve 46 connects hydrogen detector 47, the gas after detecting through hydrogen detector 47 is discharged from the gas outlet.
Specifically, in the solution of the present embodiment, the gas path setting of the dual-light-source photoacoustic spectroscopy detection apparatus 20 is realized by the filter 41, the first three-way valve 42, the gas inlet valve 43, the gas outlet valve 44, the gas pump 45, the second three-way valve 46, the hydrogen detector 47, and the like. Based on the dual-light-source photoacoustic spectrometry detection apparatus 20 of this embodiment, the entire gas path is first cleaned before detection. In this phase, the air pump 45 is operated, the first three-way valve 42 is normally open at the middle (connected to the intake valve 43), the a (connected to the filter 41) is on, the B (connected to the B of the second three-way valve 46) is off, and the air path is in the external circulation mode. The air pump 45 transports the air to enter from the air inlet, passes through the filter 41, the end A of the first three-way valve 42, the middle end of the first three-way valve 42, passes through the air inlet valve 43, the photoacoustic cell 23 and the air outlet valve 44, then passes through the oil-gas separation device 10, the middle end of the second three-way valve 46, the end A and the hydrogen detector 47, and is discharged from the air outlet, and the cleaning process lasts about 300 s. The purpose of this step is to initialize the gas path of the dual-source photoacoustic spectroscopy detection apparatus 20 in preparation for measurement.
Further, in an embodiment, the air pump 45 and the second three-way valve 46 are specifically connected to a fixed-displacement pipe in the oil-gas separation device 10, and refer to fig. 9 in combination. In the cleaning stage, the air pump 45 delivers air to enter from the air inlet, and the air passes through the filter 41, the end a of the first three-way valve 42 and the middle end of the first three-way valve 42, passes through the air inlet valve 43, the photoacoustic cell 23 and the air outlet valve 44 to clean the quantitative tube, and then passes through the middle end of the second three-way valve 46, the end a and the hydrogen detector 47 to be discharged from the air outlet. Through the cleaning operation, residual gas components in the gas path during the previous detection can be discharged, and the detection reliability is further improved.
After the cleaning is finished, the gas production of the quantitative pipe needs to be finished, then the gas detection stage is started, in the stage, the middle ends of the first three-way valve 42 and the second three-way valve 46 are normally opened, the end A is closed, the end B is connected, and the gas path enters the internal circulation stage. The air pump 45 works, and the oil-dissolved air in the quantitative pipe is delivered to the acoustic cell 23 through the middle end of the second three-way valve 46, the end B of the first three-way valve 42, and the middle end of the second three-way valve, and is distributed in the whole air path for about 120 s. At this time, the infrared thermal radiation light source assembly 21 and the distributed feedback laser light source assembly 22 are turned on, the gas in the photoacoustic cell 23 is measured, the measurement result is read, and the next measurement cycle is performed. In this embodiment, the two ends of the quantitative tube are respectively provided with an external port, and in actual operation, the gas obtained after vacuum degassing can be input through the external ports, i.e. gas production is performed, so that the gas is conveyed to the photoacoustic cell 23 for analysis under the action of the air pump 45 and the three-way valves.
Further, referring to fig. 10, in detecting each characteristic gas, first, the hydrogen detector 47 (specifically, the hydrogen sensor) is used to measure hydrogen, and then the first distributed feedback laser in the distributed feedback laser light source module 22 is turned on to realize the acetylene (C) detection2H2) And (3) measuring the gas with high precision, and then turning on a second distribution feedback type laser to realize the measurement of the methane. After the above two measurements are completed, the infrared light source 211 in the infrared thermal radiation light source assembly 21 is turned on, and the measurement of different gases is realized by switching to different optical filters 213. For example, in one embodiment, the measurement of ethane is achieved through a first filter; then switching to a second optical filter to realize the measurement of ethylene; switching to a third optical filter to realize the measurement of the carbon dioxide; and finally, switching to a fourth optical filter to realize the measurement of the carbon monoxide.
In one embodiment, the oil gas detection device further comprises a first switching power supply and a second switching power supply, the first switching power supply is connected with the main control device 30, and the oil gas separation device 10 and the dual-light source photoacoustic spectroscopy detection device 20 are respectively connected with the second switching power supply.
In the embodiment, the power circuit design adopts the principles of strong and weak current separated routing, analog ground separated from digital ground, 5V/24V independent design and the like. Two switching power supplies are adopted for supplying power, wherein one switching power supply supplies power to the main control electric device; and another switching power supply is responsible for supplying power to the oil-gas separation device 10 and the double-light-source photoacoustic spectrum detection device 20. Further, in one embodiment, the different components of the dual-light-source photoacoustic spectroscopy detection apparatus 20 may be powered differently, such that the constant temperature device 25 and the hydrogen detector 47 are powered by a power source with the same rated power (e.g., 12V, 200W), and the photoacoustic signal processing assembly 24 is powered by a power source with another rated power (e.g., 12V, 50W).
It should be noted that, in one embodiment, the master control device 30 should be designed to meet electromagnetic compatibility and have high long-term operational reliability, and the technical specifications and requirements include:
1) adopting an integrated circuit design technology;
2) the CPU of the mainboard needs to adopt a high-performance and low-power consumption industrial chip; the operating system adopts an industrial control embedded real-time operating system such as Vxworks, Linux and the like; the long-term operation is reliable;
3) the automatic restarting function of the device after abnormal operation and communication is supported;
4) the power module needs to meet the type test project and the related technical indexes of reliability, and the technical measures such as shielding, isolation, filtering, grounding and the like are mainly considered;
5) the printed board and the components meet the industrial grade high quality requirement;
6) the overall performance of the mainboard meets the technical requirements of Q/CSG 1203025-2017 technical Specification for the online monitoring device of dissolved gas in transformer oil and the 2 nd part of the inspection Specification for the online monitoring device of the transformer equipment of DL/T1432.2-2016: online monitoring device for dissolved gas in transformer oil; the processing and debugging processes and the quality of the circuit board and the matched components are strictly executed according to an ISO9000 quality system;
7) improve the anti-interference performance of hardware mainboard, mainly include: reducing distortion of signal transmission; cross interference between signals is reduced; reducing noise from the power supply; attention is paid to the high-frequency characteristics of the printed circuit board and the components; the element arrangement needs to be divided reasonably; processing the grounding wire; a good decoupling capacitor is used; the signal identification algorithm has intelligent characteristics, and can complete weak signal identification, baseline fluctuation effective signal identification, effective signal identification during pressure change and the like of the detected characteristic gas.
Referring to fig. 11 or 12, in an embodiment, the oil gas detection apparatus further includes a cabinet 50, and the oil gas separation device 10, the dual light source photoacoustic spectroscopy detection device 20 and the main control device 30 are disposed inside the cabinet 50.
Specifically, the size of the cabinet 50 is not unique, in one embodiment, according to the standard requirement, an intelligent outdoor cabinet structure design with the size of 650 (long) mm × 650 (wide) mm × 1200 (high) mm is adopted, the cabinet 50 is made of a stainless steel plate with the plate thickness of 1.5mm, the cabinet adopts a double-layer heat insulation structure, heat insulation materials are placed on the inner side, a sealing strip is additionally arranged at a position where the cabinet door is in contact with the cabinet 50, the sealing performance of the cabinet 50 is ensured, the IP55 protection grade is met, an industrial special air conditioner is additionally arranged on the rear cabinet door, the temperature range in the cabinet is controlled to be 5-30 ℃, and the requirement of the outdoor environment temperature of-40 ℃ to +70 ℃ is met.
The adopted outline dimension chart and the in-cabinet arrangement chart are shown in fig. 11 and 12. The size of the cabinet 50: 650 (long) mm × 650 (wide) mm × 1200 (high) mm. The cabinet mainly comprises four parts, namely a main control device 30, a power circuit module (comprising a first switching power supply, a second switching power supply and the like), a double-light-source photoacoustic spectrum detection device 20 and an oil-gas separation device 10 from top to bottom. Gas detection equipment adopts 19 inches industry machine case formula structural design in the fluid, and among the gas detection equipment in the fluid of this application, each device adopts modular structure design, conveniently changes after equipment failure and later stage module upgrading, improves maintenance efficiency, extension device life.
For example, in a more detailed embodiment, the modular structure of the main control device 30 is designed by using a 2U standard, 19-inch shelf-type closed box structure, and the external dimensions are as follows: length, depth, height 425mm, 290mm, 88 mm. The power supply loop module adopts 2U standard, 19 inches upper rack type box body structural design, and the overall dimension is as follows: length, depth, height 425mm, 290mm, 88 mm; the modular structure that two light source optoacoustic spectrum detection device 20 correspond adopts 2U standard, 19 inches upper rack type box structural design, and overall dimension: length, depth, height, 425mm, 320mm, 221 mm; the modular structure that oil-gas separation device 10 corresponds adopts 9U standard, 19 inches to go up posture box structural design, and overall dimension: length, depth, height, 425mm, 300mm, 399 mm. Meanwhile, auxiliary devices such as interface flanges, oil pipes, communication cables and the like are installed in the cabinet 50, and the cabinet 50 is installed in situ near an external oil storage device (such as a transformer). The size of the cabinet 50: 650 (long) mm × 650 (wide) mm × 1200 (high) mm.
In one embodiment, the gas detection device in oil further includes a display device disposed on an outer surface of the cabinet 50, and the display device is connected to the main control device 30.
Specifically, the display device can realize real-time display of measurement results, alarm, display of historical measurement results and the like, so that a user can conveniently view the measurement results, and specifically, reference can be made to fig. 13 and 14. This display device specifically can be liquid crystal display device, and on the door plant before the liquid crystal display module is built in, adopts modular structure design equally, and overall dimension is: length, width, and depth 209.40mm 149.2mm 23.90 mm.
In one embodiment, please refer to fig. 15, as shown in the figure, the oil-gas separation device 10 is externally connected to an oil inlet pipe and an oil return pipe with an outer diameter of 6mm to an external oil storage device, and the oil-gas separation device 10 is also externally connected to a sample inlet pipe with an outer diameter of 3mm to the dual-light-source photoacoustic spectrometry detection device 20, and the gas obtained by vacuum degassing is transmitted to the dual-light-source photoacoustic spectrometry detection device 20 for detection and analysis.
Above-mentioned gas detection equipment in fluid, outside oil storage equipment is connected to oil-gas separation device 10, can carry out vacuum degassing after the fluid of outside oil storage equipment flows into oil-gas separation device 10, obtains the gas of dissolving in the fluid, and the main oil tank is carried back to the fluid of accomplishing with degassing simultaneously, non-staining fluid, and does not consume the fluid in the outside oil storage equipment. When analyzing the gas in the oil, the dual-light-source photoacoustic spectrometry detection device 20 can perform photoacoustic spectrometry detection by combining laser light and black light, thereby obtaining concentration parameters of different characteristic gases in the gas and returning the concentration parameters to the main control device 30. Through this kind of scheme, adopt laser-black body light to combine optoacoustic spectrum detection technology, not only need not carry out gas chromatography's similar carrier gas, chromatographic column and change, can adopt different light sources to carry out optoacoustic spectrum to detect to the characteristic gas of different grade type moreover to the concentration detection of multiple characteristic gas is carried out to the accuracy, has the advantage that detects the high reliability.
A gas detection system in oil comprises an upper computer and the gas detection equipment in oil, wherein a main control device 30 is connected with the upper computer.
Specifically, the gas detection device in oil is shown in the above embodiments and drawings, and will not be described herein again. The upper computer considers the application characteristics of multi-user, remote on-line monitoring and the like, and adopts an object-oriented design mode and an embedded WebServer technology, so that the system has the characteristics of good expansibility and importance, no need of installing client software and the like. By the software, system data, browsing historical data and viewing server-side and local data can be monitored in real time, and system parameters can be modified when authorization is obtained. The software well meets the requirements of the on-line monitoring device for the dissolved gas in the oil, and realizes the functions of data analysis, data display, real-time monitoring, report form, parameter setting and the like. The software runs under a Vxworks operating system, provides a friendly user interface, and is simple to operate and convenient to maintain.
Simultaneously, this host computer software still possesses following advantage: the system is safe and reliable in operation, runs in an embedded Vxworks operating system, is high in safety performance and is free from virus infection; the user management based on the authority is adopted, so that the system has strong pertinence, and the user management of the system is more humanized. Powerful and abundant data control functions. Strong platform support; the software runs on the current popular embedded WebServer platform, is safe and stable, and has strong expandability. The method has the advantages of facilitating data query and visual trend analysis, and facilitating query of equipment names, current concentration data, relative growth rate, absolute growth rate, historical data and the like. And a trend graph may be automatically generated based on the historical data.
In a more detailed embodiment, the main functions of the upper computer software are as follows:
in the upper computer, a user can access device software in a WEB page WEB mode, and an IP address of the device is input at an IE website to realize automatic login. The main interface of the system is shown in fig. 16, wherein the leftmost end of the main interface is a page fast navigation button, which can be switched rapidly between equipment parameter setting, communication parameter setting, data query, fault diagnosis and online monitoring. The upper part of the main interface is the current measured value of each component characteristic gas. The lower sub-area is related to the operation of the device, namely, the telemetering remote signaling value and the diagnosis alarm parameter.
Above-mentioned gas detection system in fluid, outside oil storage equipment is connected to oil-gas separation device 10, can carry out vacuum degassing after the fluid of outside oil storage equipment flows into oil-gas separation device 10, obtains the gas of dissolving in the fluid, and the main oil tank is carried back to the fluid of accomplishing with degassing simultaneously, non-staining fluid, and does not consume the fluid in the outside oil storage equipment. When analyzing the gas in the oil, the dual-light-source photoacoustic spectrometry detection device 20 can perform photoacoustic spectrometry detection by combining laser light and black light, thereby obtaining concentration parameters of different characteristic gases in the gas and returning the concentration parameters to the main control device 30. Through this kind of scheme, adopt laser-black body light to combine optoacoustic spectrum detection technology, not only need not carry out gas chromatography's similar carrier gas, chromatographic column and change, can adopt different light sources to carry out optoacoustic spectrum to detect to the characteristic gas of different grade type moreover to the concentration detection of multiple characteristic gas is carried out to the accuracy, has the advantage that detects the high reliability.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (14)
1. The utility model provides a gas detection equipment in fluid which characterized in that includes:
the oil-gas separation device is connected with the external oil storage equipment and is used for performing vacuum degassing on oil flowing from the external oil storage equipment and then injecting the oil back to the external oil storage equipment;
the double-light-source photoacoustic spectrum detection device is connected with the oil-gas separation device and is used for performing photoacoustic spectrum detection on the gas subjected to vacuum degassing by the oil-gas separation device through laser and black light to obtain concentration parameters of gases with different characteristics in the gas;
the main control device is connected with the oil-gas separation device and the double-light-source photoacoustic spectrum detection device and used for controlling the operation of the oil-gas separation device and the double-light-source photoacoustic spectrum detection device and acquiring concentration parameters of different characteristic gases in the gas when receiving a starting signal.
2. The oil gas detection equipment according to claim 1, wherein the oil gas separation device comprises a vacuum pump, a degassing component, a first solenoid valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, an oil inlet pipeline, an oil return pipeline, a gas collection pipeline and a vacuum pipeline;
the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve, the degassing assembly and the vacuum pump are respectively connected with the main control device; the degassing assembly is connected with external oil storage equipment through the oil inlet pipeline and the oil return pipeline respectively, the first electromagnetic valve is arranged on the oil inlet pipeline, and the second electromagnetic valve is arranged on the oil return pipeline; the degassing assembly is connected with the double-light-source photoacoustic spectrum detection device through the gas collection pipeline, and the fourth electromagnetic valve is arranged on the gas collection pipeline; the vacuum pump is connected to one end, close to the dual-light-source photoacoustic spectrometry detection device, of the fourth electromagnetic valve through the vacuum pipeline, and the third electromagnetic valve is arranged on the vacuum pipeline.
3. The oil gas detection device according to claim 2, wherein the degassing component comprises a degassing cavity, a cylinder, a motor and a connecting pipeline;
the degassing cavity is connected with external oil storage equipment through the oil inlet pipeline and the oil return pipeline respectively, the degassing cavity is connected with the double-light-source photoacoustic spectrum detection device through the gas collection pipeline, and the degassing cavity is connected with the oil cylinder through the connecting pipeline; the motor is connected with the oil cylinder and used for driving the piston of the oil cylinder to move, and the motor is connected with the main control device.
4. The oil gas detection apparatus according to claim 2 or 3, wherein the oil gas separation device further comprises a dosing pipe and a six-way valve, the dosing pipe is disposed on the gas collection pipeline, and the gas collection pipeline is connected to the dual-light-source photoacoustic spectroscopy detection apparatus through the six-way valve.
5. The oil gas detection apparatus according to claim 1, wherein the dual-light-source photoacoustic spectroscopy detection device comprises an infrared thermal radiation light source assembly, a distributed feedback laser light source assembly, a photoacoustic cell, and a photoacoustic signal processing assembly;
the infrared thermal radiation light source assembly, the distributed feedback type laser light source assembly and the photoacoustic signal processing assembly are respectively connected with the main control device, the photoacoustic cell is connected with the oil-gas separation device, and the photoacoustic signal processing assembly is arranged in the photoacoustic cell; when the infrared thermal radiation light source component and the distributed feedback type laser light source component respectively emit exciting light to the photoacoustic cell, the photoacoustic signal processing component respectively analyzes photoacoustic signals generated after the exciting light is absorbed by the characteristic gases to obtain concentration parameters of the characteristic gases.
6. The oil gas detection device according to claim 5, wherein the infrared thermal radiation light source assembly comprises an infrared light source, a chopper and at least one optical filter, the infrared light source and the chopper are respectively connected with the main control device, the chopper is connected with the infrared light source, and the optical filter is arranged between the chopper and the photoacoustic cell.
7. The gas detection apparatus in oil according to claim 5, wherein the photoacoustic signal processing module comprises a microphone, a photoacoustic signal demodulator, an amplifier and a signal processor, the microphone is disposed in the photoacoustic cell, the microphone is connected to the photoacoustic signal demodulator, the photoacoustic signal demodulator is connected to the amplifier, the amplifier is connected to the signal processor, and the signal processor is connected to the main control device.
8. The gas detection apparatus in oil of claim 5, wherein the photoacoustic cell is a non-resonant photoacoustic cell.
9. The oil gas detection apparatus according to any one of claims 5 to 8, wherein the dual-light-source photoacoustic spectroscopy detection apparatus further comprises a thermostat, and the infrared thermal radiation light source assembly, the distributed feedback laser light source assembly, the photoacoustic cell, and the photoacoustic signal processing assembly are disposed inside the thermostat.
10. The gas detection equipment in oil according to claim 9, wherein the thermostat is provided with a gas inlet and a gas outlet, and the dual-light-source photoacoustic spectrometry detection device further comprises a filter, a first three-way valve, a gas inlet valve, a gas outlet valve, a gas pump, a second three-way valve and a hydrogen detector;
the filter the first three-way valve the admission valve the air outlet valve the air pump the second three-way valve with the hydrogen detector all set up in constant temperature equipment's inside, oil-gas separation device passes through the air inlet is connected the filter, the filter is connected first three-way valve, first three-way valve connection the admission valve, the admission valve is connected the optoacoustic pond, the optoacoustic pond is connected the air outlet valve, the air outlet valve is connected the air pump, the air pump is connected oil-gas separation device, oil-gas separation device connects the second three-way valve, first three-way valve connection the second three-way valve, the second three-way valve is connected the hydrogen detector, the warp the gaseous follow after the hydrogen detector detects the gas outlet is discharged.
11. The oil gas detection apparatus according to claim 1, further comprising a first switching power supply and a second switching power supply, wherein the first switching power supply is connected to the main control device, and the oil gas separation device and the dual-light source photoacoustic spectroscopy detection device are respectively connected to the second switching power supply.
12. The oil gas detection device according to claim 1 or 11, further comprising a cabinet, wherein the oil gas separation device, the dual light source photoacoustic spectroscopy detection device and the master control device are all disposed inside the cabinet.
13. The oil gas detection device according to claim 12, further comprising a display device disposed on an outer surface of the cabinet, wherein the display device is connected to the main control device.
14. An oil gas detection system, characterized by comprising an upper computer and the oil gas detection equipment of any one of claims 1 to 13, wherein the main control device is connected with the upper computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111150144.1A CN113758876A (en) | 2021-09-29 | 2021-09-29 | Gas detection equipment and system in oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111150144.1A CN113758876A (en) | 2021-09-29 | 2021-09-29 | Gas detection equipment and system in oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113758876A true CN113758876A (en) | 2021-12-07 |
Family
ID=78798166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111150144.1A Pending CN113758876A (en) | 2021-09-29 | 2021-09-29 | Gas detection equipment and system in oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113758876A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115406839A (en) * | 2022-11-02 | 2022-11-29 | 国电南京自动化股份有限公司 | Online monitoring device for dissolved gas in transformer oil |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101498690A (en) * | 2009-02-19 | 2009-08-05 | 上海交通大学 | Online fault monitoring system for power transformer |
| CN202404070U (en) * | 2011-12-30 | 2012-08-29 | 昆山和智电气设备有限公司 | System for monitoring content of gas in transformer oil in online manner |
| CN105699150A (en) * | 2016-04-08 | 2016-06-22 | 大连世有电力科技有限公司 | Vacuum ultrasonic degassing device for portable transformer oil photoacoustic spectrum detection device |
| CN108387527A (en) * | 2018-02-08 | 2018-08-10 | 思源电气股份有限公司 | The optoacoustic spectroscopy oil and gas detection device of cross jamming can be eliminated |
| CN108535184A (en) * | 2018-04-10 | 2018-09-14 | 大连理工大学 | A kind of optoacoustic spectroscopy multicomponent trace gas detection instrument and method |
| CN109765185A (en) * | 2019-01-22 | 2019-05-17 | 重庆大学 | A kind of Laser Photoacoustic Spectroscopy detection device using single photoacoustic cell measurement multicomponent gas |
| CN109900644A (en) * | 2019-04-11 | 2019-06-18 | 南京无书化工有限公司 | A kind of component transformer oil gas on-Line Monitor Device and method less |
| CN111175232A (en) * | 2020-01-19 | 2020-05-19 | 中国科学院电工研究所 | Photoacoustic spectroscopy device for detecting dissolved gas in transformer oil |
| CN111595782A (en) * | 2020-05-26 | 2020-08-28 | 国网天津市电力公司电力科学研究院 | Transformer oil sleeve insulating oil on-line monitoring device |
| CN112213277A (en) * | 2020-09-29 | 2021-01-12 | 湖北鑫英泰系统技术股份有限公司 | Oil-immersed equipment oil way control method and device |
| CN112945861A (en) * | 2021-01-29 | 2021-06-11 | 南京客莱沃智能科技有限公司 | Two-stage absorption acousto-optic spectroscopy insulating oil dissolved gas online monitoring system |
-
2021
- 2021-09-29 CN CN202111150144.1A patent/CN113758876A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101498690A (en) * | 2009-02-19 | 2009-08-05 | 上海交通大学 | Online fault monitoring system for power transformer |
| CN202404070U (en) * | 2011-12-30 | 2012-08-29 | 昆山和智电气设备有限公司 | System for monitoring content of gas in transformer oil in online manner |
| CN105699150A (en) * | 2016-04-08 | 2016-06-22 | 大连世有电力科技有限公司 | Vacuum ultrasonic degassing device for portable transformer oil photoacoustic spectrum detection device |
| CN108387527A (en) * | 2018-02-08 | 2018-08-10 | 思源电气股份有限公司 | The optoacoustic spectroscopy oil and gas detection device of cross jamming can be eliminated |
| CN108535184A (en) * | 2018-04-10 | 2018-09-14 | 大连理工大学 | A kind of optoacoustic spectroscopy multicomponent trace gas detection instrument and method |
| CN109765185A (en) * | 2019-01-22 | 2019-05-17 | 重庆大学 | A kind of Laser Photoacoustic Spectroscopy detection device using single photoacoustic cell measurement multicomponent gas |
| CN109900644A (en) * | 2019-04-11 | 2019-06-18 | 南京无书化工有限公司 | A kind of component transformer oil gas on-Line Monitor Device and method less |
| CN111175232A (en) * | 2020-01-19 | 2020-05-19 | 中国科学院电工研究所 | Photoacoustic spectroscopy device for detecting dissolved gas in transformer oil |
| CN111595782A (en) * | 2020-05-26 | 2020-08-28 | 国网天津市电力公司电力科学研究院 | Transformer oil sleeve insulating oil on-line monitoring device |
| CN112213277A (en) * | 2020-09-29 | 2021-01-12 | 湖北鑫英泰系统技术股份有限公司 | Oil-immersed equipment oil way control method and device |
| CN112945861A (en) * | 2021-01-29 | 2021-06-11 | 南京客莱沃智能科技有限公司 | Two-stage absorption acousto-optic spectroscopy insulating oil dissolved gas online monitoring system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115406839A (en) * | 2022-11-02 | 2022-11-29 | 国电南京自动化股份有限公司 | Online monitoring device for dissolved gas in transformer oil |
| CN115406839B (en) * | 2022-11-02 | 2023-01-24 | 国电南京自动化股份有限公司 | Online monitoring device for dissolved gas in transformer oil |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101487818B (en) | On-line monitoring method and system for gas content in transformer oil | |
| CN102539338B (en) | Online monitoring system for gas content in transformer oil by using photoacoustic spectrum | |
| CN102445433B (en) | SF6 decomposition gas infrared spectrum multi-component detection method and device | |
| CN202404070U (en) | System for monitoring content of gas in transformer oil in online manner | |
| CN101498690B (en) | Online fault monitoring system for power transformer | |
| CN108387527B (en) | Photoacoustic spectrum oil gas detection device capable of eliminating cross interference | |
| CN201402257Y (en) | Gas content on-line monitoring system in transformer oil | |
| CN105548024A (en) | Photoacoustic spectrometry gas detection device based on pulse infrared light source | |
| CN113758876A (en) | Gas detection equipment and system in oil | |
| CN103245644B (en) | Quick detecting device and method of toxic and harmful organic chemical pollutants in water body | |
| Chen et al. | Portable ppb-level acetylene photoacoustic sensor for transformer on-field measurement | |
| CN110702611A (en) | Laser photoacoustic spectrum oil gas online monitoring system | |
| CN102507496A (en) | Device and method for detecting SF6 decomposed gas by spectrum absorption optical fiber sensor | |
| CN102527094A (en) | Oil-gas separation device for transformer insulation oil | |
| CN110887799A (en) | Device and method for carrying out intermittent in-situ detection on complex water body based on spectrum method | |
| CN106198393A (en) | Gases Dissolved in Transformer Oil detection device | |
| CN104198394A (en) | Photoacoustic spectrometry detection device with detachable optical filter plate structure | |
| CN207007711U (en) | A kind of TDLAS detects SF6The device of humidity in electrical equipment | |
| CN112067556B (en) | Oil-gas detection method and device for oil-immersed equipment | |
| CN111812035B (en) | Modularized laboratory equipment for detecting trace gas based on photoacoustic spectrum principle | |
| CN113959956A (en) | Double-chamber photoacoustic spectrum monitoring system for dissolved gas in transformer oil | |
| CN206848162U (en) | A kind of infrared spectrometric oil detector | |
| CN112213277A (en) | Oil-immersed equipment oil way control method and device | |
| CN109444049B (en) | Photoacoustic spectrum detection device with self-frequency-modulation noise-reduction function | |
| CN112179983A (en) | Oil-immersed equipment alarm device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211207 |