CN104623930A - Degasser applied to analysis of dissolved gas in oil by photoacoustic spectroscopy principle - Google Patents
Degasser applied to analysis of dissolved gas in oil by photoacoustic spectroscopy principle Download PDFInfo
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- CN104623930A CN104623930A CN201510047127.3A CN201510047127A CN104623930A CN 104623930 A CN104623930 A CN 104623930A CN 201510047127 A CN201510047127 A CN 201510047127A CN 104623930 A CN104623930 A CN 104623930A
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Abstract
The invention discloses a degasser applied to analysis of a dissolved gas in oil by a photoacoustic spectroscopy principle so as to separate oil and gas of transformer insulation oil. The degasser is mainly composed of an oil cylinder, a gas cylinder, a gas chamber, oil chambers and a photoacoustic cavity. Characteristic gas separated by vacuum degassing can be transferred into the photoacoustic cavity to be used in photoacoustic spectrometry. The oil chambers, the gas chamber and the photoacoustic cavity of the degasser are special chamber components, wherein each oil chamber is of a double-hole bottom-cover structure, and oil can be returned safely in cooperation with a liquid level sensor. Two symmetrical oil chambers are arranged on the degasser to achieve the functions of dual-direction oil return and oil channel cleaning; meanwhile, single-point oil sample collection can be prevented, and the multi-point circulation collection of the oil sample can be realized.
Description
Technical field
The invention belongs to intelligent substation on-line monitoring field, the invention provides a kind of degasser being applied to optoacoustic spectroscopy principle dissolved gas analysis, utilize vacuum outgas principle, the effective separation to dissolved gas in transformer insulation oil can be realized.
Background technology
Power transformer is one of most important equipment in transformer station, and transformer insulated fault often brings huge economic loss.In traditional transformer station, generally judged the state of insulation of transformer by preventive trial, there is the problem that maintenance is excessive and maintenance is not enough in the preventive trial regularly performed, be not suitable with the electrical network scale of scale expanding day simultaneously.In intelligent substation, can be reflected the state of insulation of transformer by on-Line Monitor Device in real time, the state of insulation according to transformer can realize repair based on condition of component, the many drawbacks avoiding periodic inspection to bring.
As the most effective means of transformer insulated fault early warning, Gases Dissolved in Transformer Oil on-line analysis device successfully avoids repeatedly the generation of major accident.By to the measurement of the seven kinds of gas contents such as H2, CH4, C2H2, C2H4, C2H6, CO, CO2 in transformer insulation oil and analysis, effective deduction can be made according to having experience to transformer insulation state.The chromatography widely applied in Gases Dissolved in Transformer Oil on-line analysis can realize the measurement of seven kinds of characteristic gas, but it has the easily aging shortcoming of consume carrier gas, sensor and chromatographic column.Optoacoustic spectroscopy utilizes the intrinsic physics infrared characteristic of characteristic gas, can realize the measurement with a wide range of precise to characteristic gas, and without the need to consumptive materials such as carrier gas.
In the dissolved gas analysis device of optoacoustic spectroscopy principle, degassed principle is divided into that head space is degassed, vacuum outgas and macromolecule permeable membrane degassed.The degassed rate of the degassed principle of head space is low, and wherein malleation head space also exists risk bubble being blown into transformer; The macromolecule permeable membrane degassing equilibrium time is longer, and diaphragm is fragile; The degassed rate of vacuum outgas is high, and equilibration time is shorter, and the degasser that this patent relates to is vacuum outgas principle.
Chinese Patent Application No. 201310124234.2 patents describe a kind of degasser principle, this degasser is applied to the gas phase chromatographic device of carrier gas, inapplicable with optoacoustic spectroscopy principle device, and does not possess bidirectional safe oil return function.
Summary of the invention
For solving the Oil-gas Separation difficult problem in Gases Dissolved in Transformer Oil analysis, the present invention proposes a kind of degasser being applied to optoacoustic spectroscopy principle dissolved gas analysis.The present invention is concrete by the following technical solutions.
Be applied to a degasser for optoacoustic spectroscopy principle dissolved gas analysis, comprise oil cylinder 1, two grease chamber 2 and 3, air chamber 4, PA cell 5, cylinder 6, and multiple magnetic valve S1 ~ S9; It is characterized in that:
The oilhole of side, lower end, described grease chamber 1 is connected with oil tank of transformer by the first magnetic valve S1, and opposite side oilhole is connected with oil cylinder 1 by the second magnetic valve S2;
The oilhole of side, lower end, described grease chamber 23 is connected with oil cylinder 1 by the 3rd magnetic valve S3, and opposite side oilhole is connected with oil tank of transformer by the 4th magnetic valve S4;
The perforate of side, described air chamber 4 lower end is connected with the upper end of grease chamber 1 by the 5th magnetic valve S5, and opposite side perforate is connected with the upper end of grease chamber 23 by the 6th magnetic valve S6;
The air admission hole of described PA cell 5 is connected with the upper end of air chamber 4 by the 7th magnetic valve S7, and venthole is connected with cylinder 6 by the 8th magnetic valve S8;
Described cylinder) be also connected with the 9th magnetic valve S9, the exhaust outlet of forming apparatus.
The present invention can also further preferred following technical scheme.
PA cell is connected between air chamber and cylinder by the 7th magnetic valve S7 and the 8th magnetic valve S8, and in degasification process, PA cell is as a part for characteristic gas collection chamber.
Grease chamber one, grease chamber two structure are identical, form by upper end cover, sidewall, bottom end cover, bottom end cover is provided with liquid level sensor, liquid level sensor exceeds bottom end cover inner surface, an oilhole is respectively had, two oil hole structure positional symmetry, oilhole diameter 2mm in liquid level sensor both sides, possess 90 degree of turnings, opening upwards.
Grease chamber 1 and the first coupled magnetic valve S1, the second magnetic valve S2, oil cylinder 1 both sides are arranged symmetrically in grease chamber 23 and the 3rd coupled magnetic valve S3, the 4th magnetic valve S4, both oil return can be carried out by grease chamber 1 in degasification process, can carry out oil return by grease chamber 23 again, device possesses two-way oil return structure.
The present invention has following Advantageous Effects:
1, degasser of the present invention is applicable to optoacoustic spectroscopy principle dissolved gas analysis equipment, adopts vacuum principle to complete degassed.PA cell, as a part for characteristic gas collection chamber, getting under oil mass the same terms, can use the air chamber of small volume, reduces the volume of device, reduces the cost of device.PA cell adopts cascaded structure, by the state of magnetic valve S7 and S8 and the cooperation of cylinder piston position, can the multiple change of realization character gas collection chamber volume in degasification process, thus the plurality of distribution coefficient of realization character gas, be conducive to the precision that raising characteristic gas is analyzed from low concentration to high concentration gamut.
2, degasser of the present invention possesses two-way oil return function, by regularly converting oil return direction, can realize the cleaning to degasser oil pipe line, avoiding pipeline jam, avoid minute impurities to deposit and enter oil cylinder, thus greatly improves the oil cylinder life-span.
Accompanying drawing explanation
Fig. 1 is degasser structural representation of the present invention;
Fig. 2 is the grease chamber's structure chart in degasser of the present invention.
Fig. 3 is the PA cell structural representation in degasser of the present invention.
Detailed description of the invention
Below in conjunction with Figure of description, technical scheme of the present invention is further described in detail.
As shown in Figure 1, degasser of the present invention comprises oil cylinder 1, grease chamber 2,3, air chamber 4, PA cell 5, cylinder 6, magnetic valve S1 ~ S9 and controls the control electronics (not drawing in the drawings) of each magnetic valve action.The oilhole of side, lower end, grease chamber one is connected with oil tank of transformer by magnetic valve S1, and opposite side oilhole is connected with oil cylinder by magnetic valve S2; The oilhole of side, lower end, grease chamber two is connected with oil cylinder by magnetic valve S3, and opposite side oilhole is connected with oil tank of transformer by magnetic valve S4; The perforate of side, air chamber lower end is connected with the upper end of grease chamber one by magnetic valve S5, and opposite side perforate is connected with the upper end of grease chamber two by magnetic valve S6; The air admission hole of PA cell is connected with the upper end of air chamber by magnetic valve S7, and venthole is connected with cylinder by magnetic valve S8; Cylinder is also connected with magnetic valve S9, the exhaust outlet of forming apparatus.
As shown in Figure 2, be the grease chamber's structure chart in degasser of the present invention.Grease chamber is made up of upper end cover, sidewall, bottom end cover, and bottom end cover is provided with liquid level sensor, and liquid level sensor exceeds bottom end cover inner surface, respectively has an oilhole, two oil hole structure positional symmetry, oilhole diameter 2mm, possesses 90 degree of turnings, opening upwards.
Whether in grease chamber, liquid level sensor can detect inside, grease chamber has oil, when liquid level sensor has detected oil, oil in grease chamber does not necessarily have oil-through hole, the oil flowing to oil tank of transformer from grease chamber is all flow into oilhole downwards, bubble in oil will swim on the pasta in grease chamber, can not enter inside transformer.
Two oil hole structure positional symmetry, are arranged in the both sides of liquid level sensor, and any one oilhole can be used as oil return outlet, is convenient to realize two-way oil return.Transformer oil must bypass liquid level sensor from the oil that an oilhole enters safe oil return chamber just may arrive another oilhole, and due to the obstruct of liquid level sensor, bubble, all floating before another oilhole, ensures safe oil return.
As shown in Figure 3, be the PA cell structural representation in invention degasser.PA cell adopts cylinder design, uses the infrared transmission window sealing that zinc selenide is material.The bottom at PA cell two ends has air admission hole and venthole, and air admission hole is connected with air chamber and cylinder by magnetic valve respectively with venthole, and bottom and the top of PA cell are provided with microphone.
Based on degasser disclosed by the invention, the invention also discloses a kind of oil dissolved gas degas method, it is characterized in that, said method comprising the steps of:
(1) by all closed electromagnetic valves, the piston of oil cylinder 1, cylinder 6 is all positioned at top;
(2) by grease chamber 1 and air chamber 4 emptying, open the second magnetic valve S2, the 5th magnetic valve S5, control oil cylinder 1 piston and move down, the Residual oil in grease chamber 1 and air chamber 4 is sucked in oil cylinder 1;
(3) close the second magnetic valve S2 and the 5th magnetic valve S5, open the 3rd magnetic valve S3 and the 4th magnetic valve S4, control oil cylinder 1 piston moves, the Residual oil in oil cylinder 1 is drained back in oil tank of transformer by grease chamber 23;
(4) close the 3rd magnetic valve S3 and the 4th magnetic valve S4, open the second magnetic valve S2, the 5th magnetic valve S5 and the 7th magnetic valve S7, control cylinder 6 piston moves down, and is first evacuated grease chamber 1; Close the second magnetic valve S2 and the 7th magnetic valve S7, open the first magnetic valve S1, the fresh oil in oil tank of transformer enters in grease chamber 1, closes the first magnetic valve S1 and the 5th magnetic valve S5 when the liquid level sensor of air chamber 4 has detected oil at once;
(5) open the 9th magnetic valve S9, control cylinder 6 piston moves to top; Open the 8th magnetic valve S8, PA cell 5 and extraneous air are balanced, in PA cell, is full of air; Close the 9th magnetic valve S9, control cylinder 6 piston moves down and is evacuated by PA cell 5; Close the 8th magnetic valve S8, open the 9th magnetic valve S9, control cylinder 6 piston mortgage originator position, finally close the 9th magnetic valve S9;
(6) the second magnetic valve S2, the 5th magnetic valve S5 is opened, control oil cylinder 1 piston and be displaced downwardly to bottom, by in the fresh oil suction oil cylinder 1 in grease chamber 1, control cylinder 6 piston is displaced downwardly to bottom, makes to keep vacuum state in cylinder 6, now open the 7th magnetic valve S7, the 8th magnetic valve S8, start Vacuum Degassing Process, degassed complete after, characteristic gas will diffuse in PA cell, close the second magnetic valve S2, the 5th magnetic valve S5, carry out characteristic gas analysis;
(7) close the 7th magnetic valve S7, the 8th magnetic valve S8, open the 9th magnetic valve S9, control cylinder piston moves cylinder emptying, finally close the 9th magnetic valve S9.
Wherein step (5) can be repeated multiple times, repeatedly cleans PA cell.In above step using grease chamber one as inlet space, grease chamber two completes degasification process as oil revolute chamber.Also can using grease chamber two as inlet space, grease chamber one, as oil revolute chamber, completes degasification process accordingly according to same steps, realize degasser two-way enter, oil return function.
After in degasification process, characteristic gas is separated from transformer oil, diffuse in air chamber, PA cell and cylinder, characteristic gas dividing potential drop after diffusive equilibrium in PA cell and air chamber are identical with in cylinder, and in PA cell, the distribution coefficient of characteristic gas is the volume ratio participating in collecting characteristic gas chamber.In above-mentioned engineering process the 6th step, by realizing different distribution coefficients under following 3 kinds of modes: 1, magnetic valve S7, S8 all opens, cylinder piston is positioned at bottom; 2, magnetic valve S7, S8 all opens, and cylinder piston is positioned at top; 3, magnetic valve S7, S8 all opens, and after cylinder piston is positioned at bottom balance, shut electromagnetic valve 7, control cylinder piston moves to top.Wherein, mode 1 is for measuring high concentration components, and mode 2 is for density component in measurement, and mode 3 is for measuring low concentration component.Many multiplication factors of concentration can be realized by 3 kinds of distribution coefficients from source, improve the precision that characteristic gas is analyzed from low concentration to high concentration gamut.
Degasser of the present invention designs in conjunction with the dissolved gas analysis feature of optoacoustic spectroscopy principle, and possesses plurality of advantages, any amendment within the scope of the principle of the invention, improves and all belongs to protection scope of the present invention.
Claims (8)
1. one kind is applied to the degasser of optoacoustic spectroscopy principle dissolved gas analysis, it is characterized in that: described degasser is formed primarily of oil cylinder, cylinder, air chamber, grease chamber, PA cell, be transferred in PA cell by the isolated characteristic gas of vacuum outgas, detect for optoacoustic spectroscopy; Described degasser configures two symmetrical grease chambeies, realizes two-way oil return, multipoint circulation collection.
2. one kind is applied to the degasser of optoacoustic spectroscopy principle dissolved gas analysis, comprise an oil cylinder (1), two grease chambeies (2,3), an air chamber (4), a PA cell (5), a cylinder (6), and multiple magnetic valve (S1 ~ S9); It is characterized in that:
The oilhole of side, lower end, described grease chamber one (2) is connected with oil tank of transformer by the first magnetic valve (S1), and opposite side oilhole is connected with oil cylinder (1) by the second magnetic valve (S2);
The oilhole of side, lower end, described grease chamber two (3) is connected with oil cylinder (1) by the 3rd magnetic valve (S3), and opposite side oilhole is connected with oil tank of transformer by the 4th magnetic valve (S4);
The perforate of described air chamber (4) side, lower end is connected with the upper end of grease chamber one (2) by the 5th magnetic valve (S5), and opposite side perforate is connected with the upper end of grease chamber two (3) by the 6th magnetic valve (S6);
The air admission hole of described PA cell (5) is connected with the upper end of air chamber (4) by the 7th magnetic valve (S7), and venthole is connected with cylinder (6) by the 8th magnetic valve (S8);
Described cylinder (6) is also connected with the 9th magnetic valve (S9), forms the exhaust outlet of described degasser.
3. degasser according to claim 2, it is characterized in that: PA cell (5) is connected between air chamber (4) and cylinder (6) by the 7th magnetic valve (S7) and the 8th magnetic valve (S8), and in degasification process, PA cell (5) is as a part for characteristic gas collection chamber.
4. degasser according to claim 2, it is characterized in that: grease chamber one (2), grease chamber two (3) structure are identical, form by upper end cover, sidewall, bottom end cover, bottom end cover is provided with liquid level sensor, and liquid level sensor exceeds bottom end cover inner surface, respectively has an oilhole in liquid level sensor both sides, two oil-hole locations are symmetrical, oilhole diameter 2mm, possesses 90 degree of turnings, opening upwards.
5. degasser according to claim 2, it is characterized in that: grease chamber one (2) and coupled the first magnetic valve (S1), the second magnetic valve (S2), oil cylinder (1) both sides are arranged symmetrically in grease chamber two (3) and the 3rd coupled magnetic valve (S3), the 4th magnetic valve (S4), both oil return can be carried out by grease chamber one (2) in degasification process, can carry out oil return by grease chamber two (3) again, device possesses two-way oil return structure.
6. degasser according to claim 2, is characterized in that: air chamber (4) also adopts the structure identical with grease chamber one (2), grease chamber two (3).
7., based on an oil dissolved gas degas method for degasser described in claim 1-6, it is characterized in that, said method comprising the steps of:
(1) by all closed electromagnetic valves, the piston of oil cylinder (1), cylinder (6) is all positioned at top;
(2) by grease chamber one (2) and air chamber (4) emptying, open the second magnetic valve (S2), the 5th magnetic valve (S5), control oil cylinder (1) piston to move down, the Residual oil in grease chamber one (2) and air chamber (4) is sucked in oil cylinder (1);
(3) the second magnetic valve (S2) and the 5th magnetic valve (S5) is closed, open the 3rd magnetic valve (S3) and the 4th magnetic valve (S4), control oil cylinder (1) piston moves, the Residual oil in oil cylinder 1 is drained back in oil tank of transformer by grease chamber two (3);
(4) the 3rd magnetic valve (S3) and the 4th magnetic valve (S4) is closed, open the second magnetic valve (S2), the 5th magnetic valve (S5) and the 7th magnetic valve (S7), control cylinder (6) piston moves down, and is first evacuated grease chamber one (2); Close the second magnetic valve (S2) and the 7th magnetic valve (S7), open the first magnetic valve (S1), fresh oil in oil tank of transformer enters in grease chamber one (2), closes the first magnetic valve (S1) and the 5th magnetic valve (S5) when the liquid level sensor of air chamber (4) has detected oil at once;
(5) open the 9th magnetic valve (S9), control cylinder (6) piston moves to top; Open the 8th magnetic valve (S8), PA cell (5) and extraneous air are balanced, in PA cell, is full of air; Close the 9th magnetic valve (S9), control cylinder (6) piston moves down and is evacuated by PA cell (5); Close the 8th magnetic valve (S8), open the 9th magnetic valve (S9), control cylinder (6) piston mortgage originator position, finally close the 9th magnetic valve (S9);
(6) the second magnetic valve (S2), the 5th magnetic valve (S5) is opened, control oil cylinder (1) piston and be displaced downwardly to bottom, by in the fresh oil suction oil cylinder (1) in grease chamber one (2), control cylinder (6) piston is displaced downwardly to bottom, make to keep vacuum state in cylinder (6), now open the 7th magnetic valve (S7), the 8th magnetic valve (S8), start Vacuum Degassing Process, degassed complete after, characteristic gas will diffuse in PA cell, close the second magnetic valve (S2), the 5th magnetic valve (S5), carry out characteristic gas analysis;
(7) after characteristic gas is analyzed, close the 7th magnetic valve (S7), the 8th magnetic valve (S8), open the 9th magnetic valve (S9), control cylinder (6) piston moves cylinder emptying, finally close the 9th magnetic valve (S9).
8. oil dissolved gas degas method according to claim 7, is characterized in that:
Wherein, step (5) can be repeated multiple times, repeatedly cleans PA cell.
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| CN108627601A (en) * | 2018-06-28 | 2018-10-09 | 山东五岳电器有限公司 | Oil spray vacuum degasser and application method for oil chromatography on-line monitoring |
| CN108970178A (en) * | 2018-07-12 | 2018-12-11 | 河海大学常州校区 | A kind of device and method obtaining oxygen from water |
| CN109045760A (en) * | 2018-07-12 | 2018-12-21 | 河海大学常州校区 | A kind of device and method obtaining air from water |
| CN109781627A (en) * | 2019-03-18 | 2019-05-21 | 大连世有电力科技有限公司 | Wall-mount transformer oil dissolved gas on-Line Monitor Device based on laser detection |
| CN110412223A (en) * | 2019-08-28 | 2019-11-05 | 西安石油大学 | A kind of aqueous vapor separation equipment property detecting device and method based on step pulse |
| 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 |
| CN112067556A (en) * | 2020-09-29 | 2020-12-11 | 湖北鑫英泰系统技术股份有限公司 | Oil-gas detection method and device for oil-immersed equipment |
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| CN112857907A (en) * | 2021-03-30 | 2021-05-28 | 南方电网科学研究院有限责任公司 | Vacuum degassing system and degassing method for dissolved gas in insulating liquid |
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| CN114397249A (en) * | 2021-12-10 | 2022-04-26 | 河南省日立信股份有限公司 | On-line monitoring system for gas in transformer oil |
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| CN108627601A (en) * | 2018-06-28 | 2018-10-09 | 山东五岳电器有限公司 | Oil spray vacuum degasser and application method for oil chromatography on-line monitoring |
| CN108970178A (en) * | 2018-07-12 | 2018-12-11 | 河海大学常州校区 | A kind of device and method obtaining oxygen from water |
| CN109045760A (en) * | 2018-07-12 | 2018-12-21 | 河海大学常州校区 | A kind of device and method obtaining air from water |
| CN109781627A (en) * | 2019-03-18 | 2019-05-21 | 大连世有电力科技有限公司 | Wall-mount transformer oil dissolved gas on-Line Monitor Device based on laser detection |
| CN110412223A (en) * | 2019-08-28 | 2019-11-05 | 西安石油大学 | A kind of aqueous vapor separation equipment property detecting device and method based on step pulse |
| CN111175232B (en) * | 2020-01-19 | 2022-09-09 | 中国科学院电工研究所 | Photoacoustic spectroscopy device for detecting dissolved gas in transformer oil |
| 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 |
| CN112067556A (en) * | 2020-09-29 | 2020-12-11 | 湖北鑫英泰系统技术股份有限公司 | Oil-gas detection method and device for oil-immersed equipment |
| 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 |
| CN112857907A (en) * | 2021-03-30 | 2021-05-28 | 南方电网科学研究院有限责任公司 | Vacuum degassing system and degassing method for dissolved gas in insulating liquid |
| CN114397249A (en) * | 2021-12-10 | 2022-04-26 | 河南省日立信股份有限公司 | On-line monitoring system for gas in transformer oil |
| CN114397249B (en) * | 2021-12-10 | 2023-09-01 | 河南省日立信股份有限公司 | Online monitoring system for gas in transformer oil |
| CN114279971A (en) * | 2021-12-24 | 2022-04-05 | 中国科学院电工研究所 | A gaseous degasser in insulating oil for electrified detector of optoacoustic spectrum |
| CN114279971B (en) * | 2021-12-24 | 2024-07-23 | 中国科学院电工研究所 | Gas degassing device in insulating oil for photoacoustic spectrum charged detector |
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