CN114093643A - Method for maintaining insulating property of natural ester insulating oil distribution transformer - Google Patents
Method for maintaining insulating property of natural ester insulating oil distribution transformer Download PDFInfo
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- CN114093643A CN114093643A CN202111294872.XA CN202111294872A CN114093643A CN 114093643 A CN114093643 A CN 114093643A CN 202111294872 A CN202111294872 A CN 202111294872A CN 114093643 A CN114093643 A CN 114093643A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/02—Casings
- H01F27/022—Encapsulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/085—Cooling by ambient air
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/16—Water cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/18—Liquid cooling by evaporating liquids
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/22—Cooling by heat conduction through solid or powdered fillings
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention belongs to the field of voltage devices, and particularly relates to a method for maintaining the insulating property of a natural ester insulating oil distribution transformer, which comprises the following steps of; s1: firstly, manufacturing a qualified sealed oil tank, an oil tank cover, an iron core, a winding, a low-voltage sleeve, a high-voltage sleeve, a heat dissipation frame, a heat dissipation cover plate, a first heat dissipation fin, a heat dissipation tube, a second heat dissipation fin and a limiting ring, and purchasing qualified natural ester insulating oil, nitrogen, a gas pressure release valve, an inflation valve, a gas pressure gauge, a first bearing and a second bearing; natural ester insulating oil is injected into the sealed oil tank to submerge the iron core and the winding, so that heat generated by the iron core and the winding can be absorbed in time; the nitrogen can be injected into the sealed oil tank and the oil tank cover by the external air source through the inflation valve, and the situations of oxidation aging and moisture exceeding caused by long-term contact of natural ester insulating oil in the distribution transformer with air are prevented through the injected nitrogen.
Description
Technical Field
The invention relates to the field of voltage devices, in particular to a method for maintaining the insulating property of a natural ester insulating oil distribution transformer.
Background
Transformers are devices that change alternating voltage using the principle of electromagnetic induction, and are in large quantities in the national grid systems.
The insulating oil plays a role in improving the insulating strength, avoiding moisture influence, dissipating heat and extinguishing arcs in the transformer, and meanwhile, the stability of the insulating oil is closely related to the stability of the transformer.
In practical application, the natural ester insulating oil in the transformer is in contact with the ambient air for a long time to generate oxidation aging and moisture exceeding conditions, so that the transformer oil tank has the risk of bursting due to overlarge internal air pressure; therefore, a method for maintaining the insulation performance of a natural ester insulation oil distribution transformer is proposed to address the above problems.
Disclosure of Invention
In order to make up for the defects of the prior art and solve the problem that in practical application, the oil tank of the transformer has the risk of bursting due to overlarge internal air pressure because the natural ester insulating oil in the transformer is oxidized and aged and the moisture content exceeds the standard because the natural ester insulating oil is in contact with the ambient air for a long time, the invention provides a method for maintaining the insulating property of a distribution transformer of the natural ester insulating oil.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention discloses a method for maintaining the insulating property of a natural ester insulating oil distribution transformer, which comprises the following steps of;
s1: firstly, manufacturing a qualified sealed oil tank, an oil tank cover, an iron core, a winding, a low-voltage sleeve, a high-voltage sleeve, a heat dissipation frame, a heat dissipation cover plate, a first heat dissipation fin, a heat dissipation tube, a second heat dissipation fin and a limiting ring, and purchasing qualified natural ester insulating oil, nitrogen, a gas pressure release valve, an inflation valve, a gas pressure gauge, a first bearing and a second bearing;
s2: firstly, mounting a winding on an iron core, fixing the iron core in a sealed oil tank, then punching a hole on the side wall of the sealed oil tank, sealing and mounting a low-voltage sleeve and a high-voltage sleeve, and connecting the low-voltage sleeve, the high-voltage sleeve and the winding;
s3: the gas pressure release valve, the inflation valve and the gas pressure gauge are fixedly connected to the upper surface of the oil tank cover in a sealing way, natural ester insulating oil is injected into the sealing oil tank to submerge the iron core and the winding, and then the oil tank cover is connected with the sealing oil tank in a sealing way;
s4: injecting nitrogen into the oil tank cover and the sealed oil tank through an inflation valve, stopping when a pressure gauge reaches 30-50Kpa during observation, fixedly connecting second cooling fins on the outer surface of the cooling tube in a surrounding manner, sleeving a second bearing and a first bearing on the upper end and the lower end of the cooling tube, fixedly connecting a plurality of first cooling fins on the side surface of the cooling frame at intervals, connecting the first shaft in the cooling frame in a socket manner, sleeving a cooling cover plate and a limiting ring on the second bearing, fixedly connecting the cooling cover plate on the cooling frame, and mounting the mounted whole on two sides of the sealed oil tank through bolts;
s5: and (3) the installed transformer is used by electrifying, the numerical value of the gas pressure meter is periodically checked, the gas pressure release valve is opened when the numerical value exceeds 50Kpa, the nitrogen mixed gas is released, and the gas pressure release valve is closed when the gas pressure is lower than 50 Kpa.
Preferably, the transformer comprises a sealed oil tank and an oil tank cover; an iron core is fixedly connected inside the sealed oil tank; the iron core is wound and connected with a winding; the winding is electrically connected with a low-voltage bushing and a high-voltage bushing; the low-voltage sleeve and the high-voltage sleeve are communicated and fixedly connected to the side wall of the sealed oil tank; the sealed oil tank is filled with natural ester insulating oil; the upper end of the sealed oil tank is fixedly connected with an oil tank cover in a sealing way; the oil tank cover is fixedly connected with a gas pressure release valve, an inflation valve and a gas pressure gauge; nitrogen is filled in the sealed oil tank and the oil tank cover; the raised air pressure is discovered by the air pressure meter and is timely released by the air pressure release valve to reduce the air pressure, and the high-pressure air is timely discharged to enable the air pressure to be within a safe range, so that the danger of high-pressure explosion is avoided.
Preferably, the two sides of the sealed oil tank are symmetrically detachably and fixedly connected with heat dissipation frames; the heat dissipation frame is rotatably connected with a plurality of heat dissipation pipes through a plurality of first bearings; through upper end open-ended cooling tube for can receive the rainwater, when needing to the heat dissipation of sealed oil tank fine day, can carry out high-efficient heat dissipation through the evaporation of cooling tube heating rainwater.
Preferably, a plurality of second radiating fins are fixedly connected to the radiating pipe in a surrounding manner; the upper end of the radiating pipe is sleeved with a second bearing; the wind-driven generator can be blown by wind to rotate in a large area, and low-resistance rotation is realized under the action of the second bearing.
Preferably, the second bearing is fixedly connected in the heat dissipation cover plate; the heat dissipation cover plate is detachably and fixedly connected to the heat dissipation frame; the function of stably rotating the radiating pipe with low resistance can be realized by matching the second bearing and the first bearing.
Preferably, a limit ring is fixedly connected to the radiating cover plate corresponding to the second bearing thread; a plurality of first radiating fins are fixedly connected to the side wall of the radiating frame; the temperature in the sealed oil tank is transmitted to the air through the first radiating fins, and efficient radiating is achieved.
Preferably, the first radiating fin, the radiating pipe and the second radiating fin are all made of aluminum alloy sheets; so that the utility model is light and easy to be blown by wind and can not rust, and can be used for a long time.
Preferably, the liquid level of the natural ester insulating oil is positioned above the upper surface of the iron core; the low-pressure sleeve and the high-pressure sleeve are vertical to the sealed oil tank; the low voltage is output and the high voltage is connected through the low voltage bushing and the high voltage bushing.
The invention has the advantages that:
1. according to the invention, the natural ester insulating oil is injected into the sealed oil tank to submerge the iron core and the winding, so that the heat generated by the iron core and the winding can be absorbed in time; the gas charging valve can be externally connected with a gas source to inject nitrogen into the sealed oil tank and the oil tank cover, and the injected nitrogen can prevent the natural ester insulating oil in the distribution transformer from being oxidized and aged and the moisture content from exceeding the standard due to long-term contact with air; the pressure of the nitrogen can be judged by the barometer, bubbles generated in the natural ester insulating oil due to thermal failure and the like in the operation process of the distribution transformer can be effectively transferred to the upper nitrogen layer by the positive air pressure of the nitrogen in cooperation with the gas pressure release valve, the raised air pressure is found by the barometer and is timely released by the gas pressure release valve to reduce the air pressure, and the high-pressure gas is timely discharged to enable the air pressure to be in a safe range, so that the danger of high-pressure explosion is avoided;
2. the invention can receive rainwater through the radiating pipe with the opening at the upper end, and can efficiently radiate heat by heating the rainwater through the radiating pipe to evaporate when the sealed oil tank needs to radiate heat in sunny days; the second radiating fins fixedly connected to the surfaces of the radiating pipes in a surrounding mode enable a large area to be blown by wind to rotate, and low-resistance rotation is achieved under the action of the second bearing; the temperature in the sealed oil tank is transmitted to the air through the first radiating fins, and efficient radiating is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic diagram of the method steps of the first embodiment;
FIG. 2 is a schematic sectional view of the first embodiment in front view;
FIG. 3 is a schematic top view illustrating a first embodiment of the present invention;
FIG. 4 is a perspective view of a part of the first embodiment;
fig. 5 is a schematic side view of the second embodiment.
In the figure: 1. sealing the oil tank; 2. a tank cover; 3. an iron core; 4. a winding; 5. natural ester insulating oil; 6. nitrogen gas; 7. a gas pressure relief valve; 8. an inflation valve; 9. a barometer; 10. a low-pressure bushing; 11. a high voltage bushing; 12. a heat dissipation frame; 13. a heat dissipation cover plate; 14. a first heat sink; 15. a radiating pipe; 16. a second heat sink; 17. a first bearing; 18. a second bearing; 19. a limiting ring; 20. a handle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1-4, a method for maintaining insulation performance of a natural ester insulation oil distribution transformer includes the steps of;
s1: firstly, manufacturing a qualified sealed oil tank, an oil tank cover, an iron core, a winding, a low-voltage sleeve, a high-voltage sleeve, a heat dissipation frame, a heat dissipation cover plate, a first heat dissipation fin, a heat dissipation tube, a second heat dissipation fin and a limiting ring, and purchasing qualified natural ester insulating oil, nitrogen, a gas pressure release valve, an inflation valve, a gas pressure gauge, a first bearing and a second bearing;
s2: firstly, mounting a winding on an iron core, fixing the iron core in a sealed oil tank, then punching a hole on the side wall of the sealed oil tank, sealing and mounting a low-voltage sleeve and a high-voltage sleeve, and connecting the low-voltage sleeve, the high-voltage sleeve and the winding;
s3: the gas pressure release valve, the inflation valve and the gas pressure gauge are fixedly connected to the upper surface of the oil tank cover in a sealing way, natural ester insulating oil is injected into the sealing oil tank to submerge the iron core and the winding, and then the oil tank cover is connected with the sealing oil tank in a sealing way;
s4: injecting nitrogen into the oil tank cover and the sealed oil tank through an inflation valve, stopping when a pressure gauge reaches 30-50Kpa during observation, fixedly connecting second cooling fins on the outer surface of the cooling tube in a surrounding manner, sleeving a second bearing and a first bearing on the upper end and the lower end of the cooling tube, fixedly connecting a plurality of first cooling fins on the side surface of the cooling frame at intervals, connecting the first shaft in the cooling frame in a socket manner, sleeving a cooling cover plate and a limiting ring on the second bearing, fixedly connecting the cooling cover plate on the cooling frame, and mounting the mounted whole on two sides of the sealed oil tank through bolts;
s5: and (3) the installed transformer is used by electrifying, the numerical value of the gas pressure meter is periodically checked, the gas pressure release valve is opened when the numerical value exceeds 50Kpa, the nitrogen mixed gas is released, and the gas pressure release valve is closed when the gas pressure is lower than 50 Kpa.
The transformer comprises a sealed oil tank 1 and an oil tank cover 2; an iron core 3 is fixedly connected inside the sealed oil tank 1; the iron core 3 is wound with a winding 4; the winding 4 is electrically connected with a low-voltage bushing 10 and a high-voltage bushing 11; the low-voltage sleeve 10 and the high-voltage sleeve 11 are communicated and fixedly connected on the side wall of the sealed oil tank 1; the sealed oil tank 1 is filled with natural ester insulating oil 5; the upper end of the sealed oil tank 1 is fixedly connected with an oil tank cover 2 in a sealing way; the oil tank cover 2 is fixedly connected with a gas pressure release valve 7, an inflation valve 8 and a pressure gauge 9; nitrogen 6 is filled in the sealed oil tank 1 and the oil tank cover 2; when the oil pump works, the natural ester insulating oil 5 is injected into the sealed oil tank 1 to submerge the iron core 3 and the winding 4, so that heat generated by the iron core 3 and the winding 4 can be absorbed in time; the nitrogen 6 can be injected into the sealed oil tank 1 and the oil tank cover 2 by an external air source through the charging valve 8, and the situations of oxidation aging and moisture exceeding caused by long-term contact of the natural ester insulating oil 5 in the distribution transformer with air are prevented through the injected nitrogen 6; can judge the pressure size of nitrogen gas 6 through barometer 9, cooperation gas pressure relief valve 7, positive atmospheric pressure through nitrogen gas 6 can effectively transfer the distribution transformer in the operation process to last nitrogen gas 6 layers because of the bubbles that thermal failure etc. produced in natural ester insulating oil 5, the atmospheric pressure that risees is found through barometer 9 and is reduced atmospheric pressure through the timely release of gas pressure relief valve 7, timely make atmospheric pressure in safety range with high-pressure gas discharge, thereby avoid taking place the danger of high-pressure explosion.
The two sides of the sealed oil tank 1 are symmetrically detachably and fixedly connected with heat dissipation frames 12; the heat dissipation frame 12 is rotatably connected with a plurality of heat dissipation pipes 15 through a plurality of first bearings 17; during operation, through upper end open-ended cooling tube 15 for can receive the rainwater, need carry out the high-efficient heat dissipation to sealed oil tank 1 radiating time in sunny day, can heat the rainwater evaporation through cooling tube 15 and carry out the high efficiency.
A plurality of second radiating fins 16 are fixedly wound on the radiating pipe 15; the upper end of the radiating pipe 15 is sleeved with a second bearing 18; in operation, the second radiating fin 16 fixedly connected to the surface of the radiating pipe 15 is surrounded, so that a large area can be blown by wind to rotate, and low-resistance rotation is realized under the action of the second bearing 18.
The second bearing 18 is fixedly connected in the heat dissipation cover plate 13; the heat dissipation cover plate 13 is detachably and fixedly connected to the heat dissipation frame 12; when the radiator works, the function of stably rotating the radiating pipe 15 with low resistance can be realized by detachably fixedly connecting the radiating cover plate 13 and the radiating frame 12 and matching the second bearing 18 and the first bearing 17.
A limiting ring 19 is fixedly connected to the radiating cover plate 13 corresponding to the second bearing 18 through threads; a plurality of first radiating fins 14 are fixedly connected to the side wall of the radiating frame 12; during operation, the temperature in the sealed oil tank 1 is transferred to the air through the first radiating fins 14, and efficient heat dissipation is achieved.
The first radiating fin 14, the radiating pipe 15 and the second radiating fin 16 are all made of aluminum alloy sheets; in operation, the first radiating fin 14, the radiating pipe 15 and the second radiating fin 16 made of aluminum alloy are light and easy to be blown by wind and can not rust, and the radiator can be used for a long time.
The liquid level of the natural ester insulating oil 5 is positioned above the upper surface of the iron core 3; the low-voltage bushing 10 and the high-voltage bushing 11 are vertical to the sealed oil tank 1; during operation, the liquid level of the natural ester insulating oil 5 is located above the upper surface of the iron core 3, so that when the iron core 3 and the winding 4 work, generated sparks and heat can be absorbed, the winding 4 is prevented from being damaged due to local overheating, and low voltage is output and high voltage is connected through the low-voltage sleeve 10 and the high-voltage sleeve 11 which are externally connected with cables.
Example two
Referring to fig. 5, in a first comparative example, as another embodiment of the present invention, a handle 20 is fixed to an upper surface of the heat-dissipating cover 13; during operation, the handle 20 is fixedly connected to the upper surface of the heat dissipation cover plate 13, so that the heat dissipation cover plate 13, the heat dissipation frame 12 and the internal components can be directly and completely moved to the side surface of the sealed oil tank 1 through the portable handle 20 to be installed after being assembled, and the functions of separately installing the components and integrally assembling the components can be realized.
Firstly, manufacturing a qualified sealed oil tank 1, an oil tank cover 2, an iron core 3, a winding 4, a low-voltage sleeve 10, a high-voltage sleeve 11, a heat dissipation frame 12, a heat dissipation cover plate 13, a first heat dissipation fin 14, a heat dissipation pipe 15, a second heat dissipation fin 16 and a limiting ring 19, and purchasing qualified natural ester insulating oil 5, nitrogen 6, a gas pressure release valve 7, an inflation valve 8, a gas pressure gauge 9, a first bearing 17 and a second bearing 19; firstly, installing a winding 4 on an iron core 3, fixing the iron core 3 in a sealed oil tank 2, then punching a hole on the side wall of the sealed oil tank 2, sealing and installing a low-voltage sleeve 10 and a high-voltage sleeve 11, and connecting the low-voltage sleeve 10, the high-voltage sleeve 11 and the winding 5; a gas pressure release valve 7, an inflation valve 8 and a gas pressure gauge 9 are fixedly connected on the upper surface of the oil tank cover 2 in a sealing way, natural ester insulating oil 5 is injected into the sealed oil tank 1 to submerge the iron core 3 and the winding 4, and then the oil tank cover 2 is connected with the sealed oil tank 1 in a sealing way; injecting nitrogen 6 into the oil tank cover 2 and the sealed oil tank 1 through the inflation valve 8, stopping when an air pressure gauge is 9-30-50 Kpa when observing, fixedly connecting a second radiating fin 16 around the outer surface of the radiating pipe 15, sleeving a second bearing 19 and a first bearing 17 at the upper end and the lower end of the radiating pipe 15, fixedly connecting a plurality of first radiating fins 14 at intervals on the side surface of the radiating frame 12, inserting the first bearing 17 into the radiating frame 12, sleeving a radiating cover plate 13 and a limiting ring 19 on the second bearing 18, then fixedly connecting the radiating cover plate 13 on the radiating frame 12, and then installing the installed whole on two sides of the sealed oil tank 1 through bolts; the transformer after installation is used by electricity connection, the value of the gas pressure gauge 9 is periodically checked, the gas pressure release valve 7 is opened when the pressure exceeds 50Kpa, the mixed gas of the nitrogen 6 is released, and the gas pressure release valve 7 is closed when the pressure is lower than 50 Kpa.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (8)
1. A method for maintaining the insulating property of a natural ester insulating oil distribution transformer is characterized by comprising the following steps: the method comprises the following steps;
s1: firstly, manufacturing a qualified sealed oil tank, an oil tank cover, an iron core, a winding, a low-voltage sleeve, a high-voltage sleeve, a heat dissipation frame, a heat dissipation cover plate, a first heat dissipation fin, a heat dissipation tube, a second heat dissipation fin and a limiting ring, and purchasing qualified natural ester insulating oil, nitrogen, a gas pressure release valve, an inflation valve, a gas pressure gauge, a first bearing and a second bearing;
s2: firstly, mounting a winding on an iron core, fixing the iron core in a sealed oil tank, then punching a hole on the side wall of the sealed oil tank, sealing and mounting a low-voltage sleeve and a high-voltage sleeve, and connecting the low-voltage sleeve, the high-voltage sleeve and the winding;
s3: the gas pressure release valve, the inflation valve and the gas pressure gauge are fixedly connected to the upper surface of the oil tank cover in a sealing way, natural ester insulating oil is injected into the sealing oil tank to submerge the iron core and the winding, and then the oil tank cover is connected with the sealing oil tank in a sealing way;
s4: injecting nitrogen into the oil tank cover and the sealed oil tank through an inflation valve, stopping when a pressure gauge reaches 30-50Kpa during observation, fixedly connecting second cooling fins on the outer surface of the cooling tube in a surrounding manner, sleeving a second bearing and a first bearing on the upper end and the lower end of the cooling tube, fixedly connecting a plurality of first cooling fins on the side surface of the cooling frame at intervals, connecting the first shaft in the cooling frame in a socket manner, sleeving a cooling cover plate and a limiting ring on the second bearing, fixedly connecting the cooling cover plate on the cooling frame, and mounting the mounted whole on two sides of the sealed oil tank through bolts;
s5: and (3) the installed transformer is used by electrifying, the numerical value of the gas pressure meter is periodically checked, the gas pressure release valve is opened when the numerical value exceeds 50Kpa, the nitrogen mixed gas is released, and the gas pressure release valve is closed when the gas pressure is lower than 50 Kpa.
2. A method for maintaining the insulation properties of a natural ester insulation oil distribution transformer according to claim 1, wherein: the transformer comprises a sealed oil tank (1) and an oil tank cover (2); an iron core (3) is fixedly connected inside the sealed oil tank (1); a winding (4) is wound on the iron core (3); the winding (4) is electrically connected with a low-voltage bushing (10) and a high-voltage bushing (11); the low-voltage sleeve (10) and the high-voltage sleeve (11) are communicated and fixedly connected to the side wall of the sealed oil tank (1); the sealed oil tank (1) is filled with natural ester insulating oil (5); the upper end of the sealed oil tank (1) is hermetically and fixedly connected with an oil tank cover (2); a gas pressure release valve (7), an inflation valve (8) and a barometer (9) are fixedly connected to the oil tank cover (2) in a communicating manner; and nitrogen (6) is filled in the sealed oil tank (1) and the oil tank cover (2).
3. A method for maintaining the insulation properties of a natural ester insulation oil distribution transformer according to claim 2, wherein: the two sides of the sealed oil tank (1) are symmetrically detachably and fixedly connected with heat dissipation frames (12); the heat dissipation frame (12) is rotatably connected with a plurality of heat dissipation pipes (15) through a plurality of first bearings (17).
4. A method for maintaining the insulation properties of a natural ester insulation oil distribution transformer according to claim 3, wherein: a plurality of second radiating fins (16) are fixedly wound on the radiating pipe (15); and the upper end of the radiating pipe (15) is sleeved with a second bearing (18).
5. A method for maintaining the insulation properties of a natural ester insulation oil distribution transformer according to claim 4, wherein: the second bearing (18) is fixedly connected in the heat dissipation cover plate (13); the heat dissipation cover plate (13) is detachably and fixedly connected to the heat dissipation frame (12).
6. A method for maintaining the insulation properties of a natural ester insulation oil distribution transformer according to claim 5, wherein: a limiting ring (19) is fixedly connected to the radiating cover plate (13) corresponding to the second bearing (18) through threads; the side wall of the heat dissipation frame (12) is fixedly connected with a plurality of first heat dissipation fins (14).
7. A method for maintaining the insulation properties of a natural ester insulation oil distribution transformer according to claim 6, wherein: the first radiating fin (14), the radiating pipe (15) and the second radiating fin (16) are all made of aluminum alloy sheets.
8. A method for maintaining the insulation properties of a natural ester insulation oil distribution transformer according to claim 7, wherein: the liquid level of the natural ester insulating oil (5) is positioned above the upper surface of the iron core (3); the low-pressure sleeve (10) and the high-pressure sleeve (11) are perpendicular to the sealed oil tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111294872.XA CN114093643A (en) | 2021-11-03 | 2021-11-03 | Method for maintaining insulating property of natural ester insulating oil distribution transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111294872.XA CN114093643A (en) | 2021-11-03 | 2021-11-03 | Method for maintaining insulating property of natural ester insulating oil distribution transformer |
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| CN114093643A true CN114093643A (en) | 2022-02-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117612829A (en) * | 2023-12-06 | 2024-02-27 | 河北承安电气有限公司 | Stable and safe environment-friendly transformer |
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2021
- 2021-11-03 CN CN202111294872.XA patent/CN114093643A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117612829A (en) * | 2023-12-06 | 2024-02-27 | 河北承安电气有限公司 | Stable and safe environment-friendly transformer |
| CN117612829B (en) * | 2023-12-06 | 2024-05-03 | 河北承安电气有限公司 | Stable and safe environment-friendly transformer |
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