CN102034591B - Device and method for injecting oil into transformer under vacuum condition - Google Patents

Device and method for injecting oil into transformer under vacuum condition Download PDF

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Publication number
CN102034591B
CN102034591B CN2010105242329A CN201010524232A CN102034591B CN 102034591 B CN102034591 B CN 102034591B CN 2010105242329 A CN2010105242329 A CN 2010105242329A CN 201010524232 A CN201010524232 A CN 201010524232A CN 102034591 B CN102034591 B CN 102034591B
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China
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valve
transformer
vacuum
oil
way pipe
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CN2010105242329A
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Chinese (zh)
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CN102034591A (en
Inventor
李琪
周广宇
任东波
马福建
张秀川
梁作德
冯勇
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山东鲁能泰山电力设备有限公司
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Publication of CN102034591A publication Critical patent/CN102034591A/en
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Abstract

The invention provides a device and method for injecting oil into a transformer under a vacuum condition. The device comprises a vacuum pump (2), an oil filter (3), a vacuum pressure gauge (4), a residual pressure gauge (5), a valve I (8), a valve II (9), a valve V (21) and a three-way pipe I (25), wherein, the vacuum pump (2) is communicated with a breathing tube on the top of an oil storage tank at the upper part of the transformer through the valve I (8), the three-way pipe I (25) and the valve II (9); one end of the three-way pipe I (25) is communicated with the residual pressure gauge (5); the vacuum pressure gauge (4) is arranged between the three-way pipe I (25) and the valve II (9) and is communicated with the three-way pipe I (25) and the valve II (9); and the oil filter (3) is communicated with an oil filling port or an oil discharging port at the lower part of the transformer through the valve V (21). The method comprises the following steps: opening the valve I (8) and the valve II (9); when the specified vacuum degree of 13-133Pa reaches, keeping the vacuum degree for 4-6 hours, and then opening a valve VI (22) and the valve V (21); starting up the oil filter (3) for slowly injecting the oil into the transformer; and sequentially closing the valve V (21), the valve VI (22) and the valve II (9) so that the vacuum pump (2) is separated from the valve I (8). Therefore, by means of the device and the method, the safety of the transformer is improved.

Description

The apparatus and method that are used for transformer vacuum oil
One, technical field
The present invention relates to a kind of apparatus and method that are used for transformer vacuum oil, especially a kind of apparatus and method that are applicable to the high-power transformer vacuum oil.
Two, background technology
In transformer; The heat radiation oil of injection transformer; Performance and useful life safe in utilization, that prolong transformer to guaranteeing transformer are played very important effect, and the apparatus and method that therefore are used for transformer vacuum oil are important links of transformer production.
In the existing apparatus and method that are used for transformer vacuum oil all is as shown in Figure 1, is that vacuum-pumping pipeline is connected to transformer case lid V3 valve with the vacuum pump pipeline, is that the oiling pipeline is connected to transformer bottom V4 notes or fuel outlet valve with the oil filter pipeline; Open valve V1, V2, V3, V4, V5 and start vacuum pump, reach the specified vacuum degree, and keep certain hour; Open valve V6 and oil filter and under vacuum state, carry out slow oiling; Oiling to pasta stops oiling during apart from the about 200~300mm of case top cover.Oiling is highly minimum should soak insulating press boards, the highlyest was as the criterion can not take out transformer oil; Valve-off V6 continues the vacuumize degassing certain hour; Valve-off V3 removes vacuum pump, opens valve V7, and valve-off V4 is connected to oil conservator with the oiling pipeline, the standard oil level of repairing to oil conservator.By can obviously finding out in the above correction oil injection method, this vacuum oil technology just stops to vacuumize before whole oiling process does not finish, and is the oiling technology of the whole completion transformer of ability after the transformer repairing under normal pressure.Therefore its whole oiling process is not accomplished under the state of perfect vacuum, and during the normal pressure repairing, air contacts with transformer oil; Because oxidation can be quickened the transformer oil deterioration, residual air also possibly be dissolved in transformer oil; The decreasing insulating that causes transformer oil; Possibly bury accident potential in the future to the safe operation of transformer,, check and operate all very inconvenient in addition because vacuum meter is placed on the transformer top; In Fig. 1,11-vacuum pump, 12-oil filter, 13-pressure vacuum gauge, 14-residual voltage meter.
Three, summary of the invention
In order to overcome above-mentioned technical disadvantages, the purpose of this invention is to provide a kind of apparatus and method that are used for transformer vacuum oil, therefore improved the security performance of transformer.
For achieving the above object; The technical scheme that the present invention takes is: a kind of device that is used for transformer vacuum oil; Include vacuum pump, oil filter, pressure vacuum gauge, residual voltage meter, valve I, valve II, valve V and three-way pipe I; Vacuum pump is set to successively to be communicated with the respiratory siphon at the oil conservator top on transformer top through valve I, three-way pipe I and valve II, is set to be communicated with the residual voltage meter at the end of three-way pipe I, between three-way pipe I and valve II, is provided with pressure vacuum gauge; Pressure vacuum gauge is set to be communicated with three-way pipe I and valve II, and oil filter is set to be communicated with the notes or the fuel outlet of transformer bottom through valve V.
The present invention has designed, and the assembly that transformer is provided with is a vacuum-resistant.
The present invention has designed, and the pipeline between the respiratory siphon at the oil conservator top on connection valve II and transformer top is set to the U-shaped transparent tube.
The present invention has designed, and also includes valve VI, and oil filter is set to be communicated with the transformer oil tank through valve VI.Make things convenient for the installation of oil filter.
The present invention has designed; Also include valve III, valve IV and three-way pipe II; Valve III is arranged on the bottom of transformer, and valve III is set to be communicated with the valve port on the top of transformer, and valve III is set to be communicated with three-way pipe II; Valve IV is set to be communicated with three-way pipe II through transparent tube, and three-way pipe II is set to be communicated with three-way pipe I.
The present invention has designed, and the pipeline that connects between three-way pipe I and the three-way pipe II is set to the U-shaped transparent tube.
The present invention has designed, and valve III is arranged on transformer tank and covers and be set to be communicated with the vacuum pumping valve doorway of transformer tank.
The present invention has designed, and valve III is set to be communicated with the valve port of the quick-action oil pressure relay of transformer tank.
The present invention has designed, valve III be set to transformer top, top or oil conservator and transformer body between the valve port of connecting line be communicated with.
The method that is used for transformer vacuum oil, its step:
1, opens valve valve I and valve II, start vacuum pump, observe pressure vacuum gauge, when reaching specified vacuum degree 13-133Pa, kept this vacuum degree 4-6 hour.
2, open valve VI and valve V again, start oil filter, under vacuum state, transformer is carried out slow oiling.
3, when the standard oil level of the oil conservator of fluid to transformer, valve-off V and valve VI,, valve V and oil filter are separated from, continuing to keep vacuum degree is 13-133Pa 3-4 hour, valve-off II is separated from vacuum pump and valve I again.
Because in whole oiling transformer process; It all is the vacuum state; Do not shut down, remove the step of vacuum normal pressure repairing in the middle of vacuum pump does not need, during vacuumizing the oiling process, the oiling pipeline is not removed the step that is connected to oil conservator again from the transformer body yet; Guarantee the quality of fluid, stopped the hidden danger of the decreasing insulating of transformer oil, therefore improved the security performance of transformer.
The present invention has designed, and also includes third step: observe the transparent tube that valve IV is communicated with three-way pipe II, when the level height of fluid when transformer tank pushes up, valve-off III and valve IV are separated from three-way pipe II and valve III and valve IV.
Four, description of drawings
Fig. 1 is the schematic representation of apparatus of existing vacuum oil in the background technology:
Fig. 2 is the schematic representation of apparatus of the vacuum oil of first embodiment of the present invention:
Fig. 3 is the schematic representation of apparatus of the vacuum oil of second embodiment of the present invention.
Five, embodiment
Fig. 2 is first embodiment that is used for the device of transformer vacuum oil of the present invention; Specify present embodiment in conjunction with accompanying drawing; Include vacuum pump 2, oil filter 3, pressure vacuum gauge 4, residual voltage meter 5, valve I8, valve II9, valve V21, valve VI22 and three-way pipe I25; Vacuum pump 2 is set to be communicated with the respiratory siphon at the oil conservator top on transformer top through valve I8, three-way pipe I25 and valve IIi9 successively; End at three-way pipe I25 is set to be communicated with residual voltage meter 5, between three-way pipe I25 and valve II9, is provided with pressure vacuum gauge 4, and pressure vacuum gauge 4 is set to be communicated with three-way pipe I25 and valve II9; Oil filter 3 is set to be communicated with the notes or the fuel outlet of transformer bottom through valve V21, and oil filter 3 is set to be communicated with the transformer oil tank through valve VI22.
In the present embodiment, the assembly that transformer is provided with is set to vacuum-resistant, and the oil conservator that transformer is provided with, Buchholz relay and radiator are set to vacuum-resistant.
In the present embodiment, the pipeline between the respiratory siphon at the oil conservator top on connection valve II9 and transformer top is set to the U-shaped transparent tube.The convenient situation about vacuumizing of observing.
In the present embodiment, between oil filter 3 and valve V21, be provided with special-purpose tube head, prevented oil filter 3 and the gas that is attached thereto in the pipeline gets in the transformer, special-purpose tube head has been declared Chinese utility model patent the same period.
First embodiment that is used for the method for transformer vacuum oil of the present invention, its step:
1, opens valve valve I8 and valve II9, start vacuum pump, observe pressure vacuum gauge 4, when reaching specified vacuum degree 50Pa, kept this vacuum degree 5 hours.
2, open valve VI22 and valve V21 again, start oil filter 3, under vacuum state, transformer is carried out slow oiling.
3, when the standard oil level of the oil conservator of fluid to transformer, valve-off V21 and valve VI22,, valve V21 and oil filter 3 are separated from, continuing to keep vacuum degree is 50Pa3.5 hour, valve-off II9 is separated from vacuum pump 2 and valve I8 again.
Second embodiment that is used for the method for transformer vacuum oil of the present invention, its step: 1, open valve valve I8 and valve II9, start vacuum pump, observe pressure vacuum gauge 4, when reaching specified vacuum degree 13Pa, kept this vacuum degree 4 hours.
2, open valve VI22 and valve V21 again, start oil filter 3, under vacuum state, transformer is carried out slow oiling.
3, when the standard oil level of the oil conservator of fluid to transformer, valve-off V21 and valve VI22,, valve V21 and oil filter 3 are separated from, continuing to keep vacuum degree is 13Pa 3 hours, valve-off II9 is separated from vacuum pump 2 and valve I8 again.
The 3rd embodiment that is used for the method for transformer vacuum oil of the present invention, its step: 1, open valve valve I8 and valve II9, start vacuum pump, observe pressure vacuum gauge 4, when reaching specified vacuum degree 133Pa, kept this vacuum degree 6 hours.
2, open valve VI22 and valve V21 again, start oil filter 3, under vacuum state, transformer is carried out slow oiling.
3, when the standard oil level of the oil conservator of fluid to transformer, valve-off V21 and valve VI22,, valve V21 and oil filter 3 are separated from, continuing to keep vacuum degree is 133Pa 4 hours, valve-off II9 is separated from vacuum pump 2 and valve I8 again.
Fig. 3 is second embodiment that is used for the device of transformer vacuum oil of the present invention; Specify present embodiment in conjunction with accompanying drawing; In embodiments of the invention one, also include valve III23, valve IV24 and three-way pipe II26, valve III24 is arranged on the bottom of transformer; Valve III23 is arranged on transformer tank and covers and be set to be communicated with the vacuum pumping valve doorway of transformer tank; Valve III23 is set to be communicated with three-way pipe II26, and valve IV24 is set to be communicated with three-way pipe II 26 through transparent tube, and three-way pipe II26 is set to be communicated with three-way pipe I25.
In the present embodiment, the pipeline that connects between three-way pipe I25 and the three-way pipe II26 is set to the U-shaped transparent tube.The convenient situation about vacuumizing of observing
First embodiment of the method for using of second embodiment of the device that is used for transformer vacuum oil of the present invention, its step:
1, opens valve valve I8 and valve II9, start vacuum pump, observe pressure vacuum gauge 4, when reaching specified vacuum degree 50Pa, kept this vacuum degree 5 hours.
2, open valve VI22 and valve V21 again, start oil filter 3, under vacuum state, transformer is carried out slow oiling.
3, observe the transparent tube that valve IV24 is communicated with three-way pipe II26, when the level height of fluid when transformer tank pushes up, valve-off III23 and valve IV24 are separated from three-way pipe II26 and valve III23 and valve IV24.
4, when the standard oil level of the oil conservator of fluid to transformer, valve-off V21 and valve VI22,, valve V21 and oil filter 3 are separated from, continuing to keep vacuum degree is 50Pa3.5 hour, valve-off II9 is separated from vacuum pump 2 and valve I8 again.
Second embodiment of the method for using of second embodiment of the device that is used for transformer vacuum oil of the present invention, its step:
1, opens valve valve I8 and valve II9, start vacuum pump, observe pressure vacuum gauge 4, when reaching specified vacuum degree 13Pa, kept this vacuum degree 4 hours.
2, open valve VI22 and valve V21 again, start oil filter 3, under vacuum state, transformer is carried out slow oiling.
3, observe the transparent tube that valve IV24 is communicated with three-way pipe II26, when the level height of fluid when transformer tank pushes up, valve-off III23 and valve IV24 are separated from three-way pipe II26 and valve III23 and valve IV24.
4, when the standard oil level of the oil conservator of fluid to transformer, valve-off V21 and valve VI22,, valve V21 and oil filter 3 are separated from, continuing to keep vacuum degree is 13Pa3 hour, valve-off II9 is separated from vacuum pump 2 and valve I8 again.
First embodiment of the method for using of second embodiment of the device that is used for transformer vacuum oil of the present invention, its step:
1, opens valve valve I8 and valve II9, start vacuum pump, observe pressure vacuum gauge 4, when reaching specified vacuum degree 133Pa, kept this vacuum degree 6 hours.
2, open valve VI22 and valve V21 again, start oil filter 3, under vacuum state, transformer is carried out slow oiling.
3, observe the transparent tube that valve IV24 is communicated with three-way pipe II26, when the level height of fluid when transformer tank pushes up, valve-off III23 and valve IV24 are separated from three-way pipe II26 and valve III23 and valve IV24.
4, when the standard oil level of the oil conservator of fluid to transformer, valve-off V21 and valve VI22,, valve V21 and oil filter 3 are separated from, continuing to keep vacuum degree is 133Pa4 hour, valve-off II9 is separated from vacuum pump 2 and valve I8 again.
In first embodiment of the present invention, the relative aperture of the respiratory siphon at the oil conservator top on transformer top is less, generally has only about 25mm; It is lower to vacuumize efficient; Transformer tank to vacuumize valve aperture bigger, be generally about 80mm, vacuumize efficient than higher.
The 3rd embodiment that is used for the device of transformer vacuum oil of the present invention, valve III23 are set to be communicated with the valve port of the quick-action oil pressure relay of transformer tank.
The 4th embodiment that is used for the device of transformer vacuum oil of the present invention, valve III23 be set to transformer top, top or oil conservator and transformer body between the valve port of connecting line be communicated with.
In the transformer that my company produces, all be to use the existing method in the background technology to carry out vacuum oil in the past, but in practical application, found because pressure vacuum gauge 4 is arranged on the top of transformer; When carrying out oil filling, operating personnel can not finish the work, thereby waste man-hour; Therefore based in order to reduce the technical problem in man-hour, design technical scheme of the present invention, but passed through one section test; Not only operating personnel can accomplish oiling work, and have saved some operations, have accelerated oil injecting speed; Guaranteed the fluid Quality of Transformer Oil simultaneously, made workload descend 20%, and improved operating efficiency.
The present invention has following characteristics:
1, not only pipeline connects and configuration is more reasonable in the present invention, pressure vacuum gauge is moved to oil conservator by the case lid top draw the bottom of respiratory siphon down, handled easily and checking.
2, the present invention has realized the processing of whole process flow process vacuum, shuts down, removes the step of vacuum normal pressure repairing in the middle of vacuum pump does not need; Also saved to vacuumize during the oiling process oiling pipeline has been removed the step that is connected to oil conservator again from the transformer body; It is simple that this technology has operation really, handling safety, time saving and energy saving characteristics.
3, for guaranteeing that transformer oil can not suck vacuum pump, increase the U-shaped vacuum-resistant transparent tube (or vacuum transition jar) of two ends band valve; When in the U-shaped vacuum-resistant transparent tube (or vacuum transition jar) transformer oil being arranged; Both the indication transformer oil level had surpassed the valve height that connects; Close the valve at U-shaped vacuum-resistant transparent tube (or vacuum transition jar) rear portion earlier, close the valve on the anterior valve of U-shaped vacuum-resistant transparent tube (or vacuum transition jar) and the transformer body that is connected again.Can prevent that transformer oil from sucking in the vacuum pump.
4, get in the transformer for the gas that prevents oil filter and be attached thereto in the pipeline, can increase special pipe joint at the D point.
In being used for the device technique field of transformer vacuum oil; Every vacuum pump 2 that includes is set to be communicated with the respiratory siphon at the oil conservator top on transformer top through valve I8, three-way pipe I25 and valve II9 successively; End at three-way pipe I25 is set to be communicated with residual voltage meter 5; Between three-way pipe I25 and valve II9, be provided with pressure vacuum gauge 4; Pressure vacuum gauge 4 is set to be communicated with three-way pipe I25 and valve II9, and the technology contents that oil filter 3 is set to be communicated with the notes or the fuel outlet of transformer bottom through valve V21 is all in protection scope of the present invention.

Claims (7)

1. device that is used for transformer vacuum oil; Include vacuum pump (2), oil filter (3), pressure vacuum gauge (4), residual voltage meter (5), valve I (8), valve II (9), valve V (21) and three-way pipe I (25); Vacuum pump (2) is set to be communicated with the respiratory siphon at the oil conservator top on transformer top through valve I (8), three-way pipe I (25) and valve II (9) successively; End at three-way pipe I (25) is set to be communicated with residual voltage meter (5); Between three-way pipe I (25) and valve II (9), be provided with pressure vacuum gauge (4); Pressure vacuum gauge (4) is set to be communicated with three-way pipe I (25) and valve II (9); Oil filter (3) is set to be communicated with the notes or the fuel outlet of transformer bottom through valve V (21), and the assembly that transformer is provided with is set to vacuum-resistant, and the pipeline between the respiratory siphon at the oil conservator top on connection valve II (9) and transformer top is set to the U-shaped transparent tube; It is characterized in that: also include valve III (23), valve IV (24) and three-way pipe II (26); Valve IV (24) is arranged on the bottom of transformer, and valve III (23) is set to be communicated with the valve port on the top of transformer, and valve III (23) is set to be communicated with three-way pipe II (26); Valve IV (24) is set to be communicated with three-way pipe II (26) through transparent tube, and three-way pipe II (26) is set to be communicated with three-way pipe I (25).
2. the device that is used for transformer vacuum oil according to claim 1; It is characterized in that: the pipeline that connects between three-way pipe I (25) and the three-way pipe II (26) is set to the U-shaped transparent tube.
3. the device that is used for transformer vacuum oil according to claim 1; It is characterized in that: valve III (23) is arranged on transformer tank and covers and be set to be communicated with the vacuum pumping valve doorway of transformer tank.
4. the device that is used for transformer vacuum oil according to claim 1; It is characterized in that: valve III (23) is set to be communicated with the valve port of the quick-action oil pressure relay of transformer tank.
5. the device that is used for transformer vacuum oil according to claim 1; It is characterized in that: valve III (23) be set to transformer top, top or oil conservator and transformer body between the valve port of connecting line be communicated with.
6. method that is used for transformer vacuum oil; This method is used like the device that is used for transformer vacuum oil in the claim 1, it is characterized in that: its step:
(1), open valve valve I (8) and valve II (9), start vacuum pump, observe pressure vacuum gauge (4), when reaching specified vacuum degree 13-133Pa, kept this vacuum degree 4-6 hour;
(2), again open valve VI (22) and valve V (21), start oil filter (3), under vacuum state, transformer is carried out slow oiling;
(3), when the standard oil level of the oil conservator of fluid to transformer; Valve-off V (21) and valve VI (22) are separated from valve V (21) and oil filter (3), and continuing to keep vacuum degree is 13-133Pa3-4 hour; Valve-off II (9) is separated from vacuum pump (2) and valve I (8) again.
7. the method that is used for transformer vacuum oil according to claim 6; It is characterized in that: also include step: observe the transparent tube that valve IV (24) is communicated with three-way pipe II (26); When the level height of fluid when transformer tank pushes up; Valve-off III (23) and valve IV (24) are separated from three-way pipe II (26) and valve III (23) and valve IV (24).
CN2010105242329A 2010-10-29 2010-10-29 Device and method for injecting oil into transformer under vacuum condition CN102034591B (en)

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CN102568764A (en) * 2012-02-01 2012-07-11 宁波奥克斯高科技有限公司 Oil injection method for oil immersion type transformers
CN102680049A (en) * 2012-06-11 2012-09-19 山东电力集团公司潍坊供电公司 Vacuum oil injection monitoring device of transformer
CN103123850B (en) * 2013-03-01 2015-07-15 山东达驰电气有限公司 Transformer half-vacuum oiling device and technology thereof
CN103440962B (en) * 2013-08-01 2016-06-01 国家电网公司 Transformer on-line intelligence repairing car and oil supplement method
CN105048320B (en) * 2013-11-15 2017-10-13 国网山东省电力公司青岛供电公司 Multidirectional transformer oil transfer system
CN103646754B (en) * 2013-12-24 2016-04-27 天威保变(秦皇岛)变压器有限公司 A kind of transformer vacuum oil method
CN104157406B (en) * 2014-07-31 2017-08-08 南通晓星变压器有限公司 Transformer capsule type oil storage cabinet

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