CN114300225A - Oil-immersed transformer convenient to change transformer oil - Google Patents
Oil-immersed transformer convenient to change transformer oil Download PDFInfo
- Publication number
- CN114300225A CN114300225A CN202111468584.1A CN202111468584A CN114300225A CN 114300225 A CN114300225 A CN 114300225A CN 202111468584 A CN202111468584 A CN 202111468584A CN 114300225 A CN114300225 A CN 114300225A
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- oil tank
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- 239000002184 metal Substances 0.000 claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000004804 winding Methods 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 6
- 238000010030 laminating Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract 1
- 239000002244 precipitate Substances 0.000 abstract 1
- 230000017525 heat dissipation Effects 0.000 description 29
- 230000000694 effects Effects 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 239000002274 desiccant Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Housings And Mounting Of Transformers (AREA)
Abstract
The invention discloses an oil-immersed transformer convenient for changing transformer oil, which comprises an oil tank, a tank cover, an oil conservator, a metal expander and a bolt, wherein an iron core is fixedly arranged in the oil tank, a winding is wrapped on the outer side of the iron core, the bottom of the oil tank is fixedly communicated with a funnel, a spiral guide plate is arranged on the inner side of the funnel, an oil drainage port is formed in the bottom of the funnel, a control valve is arranged in the oil drainage port, a low-voltage sleeve is arranged on one side of the tank cover, and a high-voltage sleeve is arranged on the other side of the tank cover. This oil-immersed transformer convenient to change transformer oil, be provided with the funnel, spiral guide plate and draining port, open the draining port, transformer oil in the oil tank is discharged through the draining port, the mobile orbit of spiral guide plate guide transformer oil this moment, it is mobile to make transformer oil be the vortex form, the transformer oil parcel that the vortex form flows is held the accumulational precipitate in oil tank bottom, be convenient for accomplish the cleanness to the oil tank when discharging the transformer oil, need not the manual work and wash, it is more convenient to use.
Description
Technical Field
The invention relates to the technical field of oil-immersed transformers, in particular to an oil-immersed transformer convenient for changing transformer oil.
Background
The oil-immersed transformer is an important device in a power distribution system, and the current in a high-voltage power grid can be reduced to the low-voltage current used by a user by using the oil-immersed transformer.
The prior oil immersed transformer is not provided with a perfect oil drainage structure, so that the transformer oil in an oil tank is difficult to be quickly discharged through an oil drainage port, meanwhile, sediment deposited at the bottom of the oil tank is difficult to flow out along with the transformer oil, so that the oil immersed transformer needs to be manually cleaned when the transformer oil is replaced, the oil immersed transformer is not practical to use, a radiating pipe arranged on the prior oil immersed transformer is usually arranged at the outer side of the oil tank, when the oil immersed transformer radiates heat by means of heat convection, the transformer oil in the oil tank is difficult to flow into the radiating pipe at the outer side of the oil tank, so that the radiating effect is poor, the prior oil immersed transformer compensates the transformer oil in the oil tank by means of an oil conservator, but the prior oil conservator needs to be communicated with the outside, although the oil conservator and other devices are arranged at the communication part with the outside, the desiccant is saturated and oxygen in the air inevitably causes the oxidation and the increase of the transformer oil, the service life of the transformer oil of the existing oil-immersed transformer is not long, and the existing equipment needs to be improved aiming at the problems.
Disclosure of Invention
The invention aims to provide an oil-immersed transformer convenient for changing transformer oil, which aims to solve the problems that the prior oil-immersed transformer proposed in the background art is not provided with a perfect oil drainage structure, sediment deposited at the bottom of an oil guide tank is difficult to flow out along with the transformer oil, so that the oil-immersed transformer needs to be manually cleaned when the transformer oil is changed, and is not practical in use, moreover, the radiating pipe arranged on the existing oil-immersed transformer is usually arranged on the outer side of the oil tank, the transformer oil in the oil tank is difficult to flow into the radiating pipe on the outer side of the oil tank, so that the radiating effect is poor, the existing oil-immersed transformer compensates the transformer oil in the oil tank by virtue of an oil conservator, however, the saturation of the drying agent and the inevitable oxygen in the air can cause the oxidation of the transformer oil and the increase of moisture, so that the service life of the transformer oil of the existing oil-immersed transformer is not long.
In order to achieve the purpose, the invention provides the following technical scheme: an oil-immersed transformer convenient for replacing transformer oil comprises an oil tank, a tank cover, an oil conservator, a metal expander and a bolt,
an iron core is fixedly installed inside the oil tank, a winding is wrapped on the outer side of the iron core, the bottom of the oil tank is fixedly communicated with a funnel, a spiral guide plate is installed on the inner side of the funnel, an oil drainage port is formed in the bottom of the funnel, a control valve is installed inside the oil drainage port, a low-voltage sleeve is installed on one side of the tank cover, and a high-voltage sleeve is installed on the other side of the tank cover;
the oil tank comprises a tank cover, a first oil storage cavity, a second oil storage cavity, a first oil tank, a second oil tank, a first heat dissipation fin, a second heat dissipation fin, a heat dissipation fan, a connecting ring pipe, a second oil tank and a third oil tank, wherein the tank cover is attached to the top of the oil tank, the bottoms of the plurality of heat dissipation fin pipes are communicated with the oil tank, the first heat dissipation fin penetrates through the heat dissipation fin pipes, the second heat dissipation fin penetrates through the outer side of the oil tank, the heat dissipation fan is installed at the top of the heat dissipation fin pipes, the outer side of the heat dissipation fan is provided with the connecting ring pipe, the bottom of the connecting ring pipe is communicated with the tops of the heat dissipation fin pipes, and the top of the connecting ring pipe is communicated with the bottom of the oil storage cavity through the connecting pipe;
the oil conservator is fixed at the top of the tank cover through a support, an oil storage cavity is formed in one side of the oil conservator, a sliding groove is formed in the other side of the oil conservator, a sealing plate is slidably mounted inside the sliding groove, the sealing plate is hermetically mounted on one side of the metal expander, the other side of the metal expander is hermetically mounted with the oil conservator, and the oil storage cavity is communicated with the inside of the metal expander.
Preferably, the oil tank is cylindrical, and the center line of the oil tank is superposed with the center line of the funnel and the center line of the oil drainage port;
through adopting above-mentioned technical scheme, the transformer oil in the oil tank of being convenient for is discharged through funnel and draining port.
Preferably, a lower flange is fixed on the outer side of the oil tank, a groove is formed in the surface of the lower flange, a sealing gasket is arranged in the groove, and the sealing gasket is attached to the bottom of the upper flange;
by adopting the technical scheme, the sealing gasket fills the gap between the lower flange and the upper flange, and the sealing effect between the lower flange and the upper flange is improved.
Preferably, one sides of the plurality of radiating fin tubes close to the central line of the oil tank are communicated with each other, and the distances between the two side surfaces of the first radiating fins and the inner walls of the two sides of the radiating fin tubes are the same;
through adopting above-mentioned technical scheme, be convenient for in the first radiating fin of even distribution of transformer oil and the clearance between the finned tube of dispelling the heat.
Preferably, the first radiating fins and the radiating finned tubes are radially arranged by taking the center line of the oil tank as the center, and the first radiating fins and the radiating finned tubes are correspondingly arranged;
by adopting the technical scheme, the first radiating fins can conduct heat in the radiating fin tubes to the outside conveniently.
Preferably, the second radiating fins are radially arranged by taking the oil tank as a center, and a certain gap is reserved between one end of each second radiating fin close to the center of the oil tank and the winding;
through adopting above-mentioned technical scheme, the second radiating fin of being convenient for conducts the heat in the oil tank to the external world.
Preferably, the central line of the cooling fan is superposed with the central line of the oil tank, the outer end of the cooling fan is attached to the inner side of the connecting ring pipe, and the outermost end of the connecting ring pipe and the outermost end of the cooling fin pipe are positioned on the same vertical plane;
by adopting the technical scheme, the heat radiation fan blows air, so that the air above uniformly passes through the gaps among the heat radiation finned tubes.
Preferably, the lowest end of the oil storage cavity is positioned above the highest end of the connecting ring pipe, and the lowest end of the connecting ring pipe is positioned on the upper side of the highest end of the radiating fin pipe;
by adopting the technical scheme, the variable pressure oil in the oil storage cavity can conveniently flow into the radiating finned tube through the connecting ring tube under the action of gravity.
Preferably, the upper flange is fixed on the outer side of the box cover, the bottom of the upper flange is attached to the top of the lower flange, and the bolt penetrates through the upper flange and the lower flange and is connected with the nut;
through adopting above-mentioned technical scheme, the cooperation of bolt and nut makes and laminates more closely between upper flange and the lower flange.
Compared with the prior art, the invention has the beneficial effects that: the oil-immersed transformer convenient for replacing the transformer oil,
(1) the oil-immersed transformer is provided with the radiating finned tube, the first radiating fin and the radiating fan, when the oil-immersed transformer operates, the winding and the iron core generate heat and heat surrounding transformer oil, the transformer oil expands and rises when heated, and the radiating finned tube is arranged right above the iron core and the winding, so that the expanded transformer oil directly flows into the radiating finned tube, the radiating fan is started, and the radiating fan cools the radiating finned tube and the first radiating fin;
(2) the oil drainage device is provided with the funnel, the spiral guide plate and the oil drainage port, the oil drainage port is opened, the transformer oil in the oil tank is discharged through the oil drainage port, at the moment, the spiral guide plate guides the flowing track of the transformer oil to enable the transformer oil to flow in a vortex shape, and the sediment accumulated at the bottom of the oil tank is wrapped by the vortex-shaped flowing transformer oil, so that the oil tank is conveniently cleaned when the transformer oil is discharged, manual cleaning is not needed, and the oil drainage device is more convenient to use;
(3) be provided with the conservator, metal expander and oil storage chamber, the metal expander is linked together with the oil storage chamber, when the transformer oil in the oil tank is heated and expands, unnecessary transformer oil gets into the oil storage chamber, extrude the metal expander under the effect of pressure, make the metal expander expand and store more transformer oil, and the same reason, when the temperature is lower in the oil tank, the transformer oil that lacks in the oil tank is contract and compensated to the metal expander shrink, be provided with the part with external intercommunication simultaneously in this structure, the pollution of material such as material to transformer oil has been avoided to substances such as external moisture and oxygen, very big improvement the life of transformer oil.
Drawings
FIG. 1 is a schematic cross-sectional front view of the present invention;
FIG. 2 is a schematic diagram of a right side view cross-sectional structure of the present invention;
FIG. 3 is a schematic top sectional view of the fuel tank of the present invention;
FIG. 4 is a schematic top cross-sectional view of the present invention;
FIG. 5 is a schematic top view of the present invention;
FIG. 6 is an enlarged view of the structure at A in FIG. 2 according to the present invention;
FIG. 7 is an enlarged view of the structure at B in FIG. 4 according to the present invention.
In the figure: 1. the oil tank, 2, the iron core, 3, the winding, 4, the funnel, 5, the spiral guide plate, 6, the draining port, 7, the control valve, 8, the case lid, 9, the low pressure sleeve pipe, 10, the high-voltage bushing, 11, the heat dissipation finned tube, 12, first radiating fin, 13, second radiating fin, 14, radiator fan, 15, the connecting ring pipe, 16, the connecting pipe, 17, the oil storage chamber, 18, the conservator, 19, the support, 20, the spout, 21, the closing plate, 22, the metal expander, 23, the lower flange, 24, the recess, 25, sealed pad, 26, the upper flange, 27, the bolt, 28, the nut.
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.
Referring to fig. 1-7, the present invention provides a technical solution: an oil-immersed transformer convenient for replacing transformer oil is disclosed, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, an iron core 2 is fixedly installed inside an oil tank 1, a winding 3 is wrapped on the outer side of the iron core 2, the oil tank 1 is cylindrical, the central line of the oil tank 1 is coincident with the central line of a funnel 4 and the central line of an oil drain opening 6, the transformer oil is guided by a spiral guide plate 5 to spirally flow out of the oil drain opening 6, the cylindrical oil tank 1 is convenient for wrapping all precipitated impurities when the transformer oil flows, a lower flange 23 is fixed on the outer side of the oil tank 1, a groove 24 is formed in the surface of the lower flange 23, a sealing gasket 25 is installed inside the groove 24, the sealing gasket 25 is attached to the bottom of an upper flange 26, gaps of the sealing gasket 25 are filled, the sealing effect of the oil-immersed transformer is enhanced, the upper flange 26 is fixed on the outer side of a tank cover 8, the bottom of the upper flange 26 is attached to the top of the lower flange 23, a bolt 27 penetrates through the upper flange 26 and the lower flange 23 to be connected with a nut 28, bolt 27 rotates, bolt 27 and nut 28 cooperation make down flange 23 and the upper flange 26 between the laminating inseparabler, the fixed intercommunication in oil tank 1 bottom has funnel 4, and 4 inboard spiral guide plates 5 of installing of funnel, and draining port 6 has been seted up to funnel 4 bottom, and draining port 6 internally mounted has control valve 7, and low pressure sleeve pipe 9 is installed to case lid 8 one side, and high-pressure sleeve pipe 10 is installed to case lid 8 opposite side, and the laminating of case lid 8 is installed at oil tank 1 top.
As shown in fig. 2, 5, 6 and 7, a plurality of heat dissipation finned tubes 11 are fixed on the top of the tank cover 8, the bottoms of the plurality of heat dissipation finned tubes 11 are communicated with the oil tank 1, one sides of the plurality of heat dissipation finned tubes 11 close to the central line of the oil tank 1 are communicated with each other, the distances between the surfaces of two sides of the first heat dissipation fins 12 and the inner walls of two sides of the heat dissipation finned tubes 11 are the same, so that the first heat dissipation fins 12 uniformly conduct the heat in the heat dissipation finned tubes 11 to the outside, the first heat dissipation fins 12 penetrate through the inside of the heat dissipation finned tubes 11, the first heat dissipation fins 12 and the heat dissipation finned tubes 11 are radially arranged by taking the central line of the oil tank 1 as the center, the first heat dissipation fins 12 and the heat dissipation finned tubes 11 are correspondingly arranged, the contact area between the first heat dissipation fins 12 and the outside is increased, the heat dissipation efficiency is improved, the second heat dissipation fins 13 penetrate through the outside of the oil tank 1, the second heat dissipation fins 13 are radially arranged by taking the oil tank 1 as the center, and a certain clearance is left between one end of the second radiating fin 13 close to the center of the oil tank 1 and the winding 3, the contact area of the second radiating fin 13 and the outside is increased, the radiating efficiency is further improved, a radiating fan 14 is installed at the top of the radiating fin tube 11, a connecting ring tube 15 is arranged at the outer side of the radiating fan 14, the center line of the radiating fan 14 is superposed with the center line of the oil tank 1, the outer end of the radiating fan 14 is attached to the inner side of the connecting ring tube 15, the outermost end of the connecting ring tube 15 and the outermost end of the radiating fin tube 11 are positioned on the same vertical surface, the radiating fan 14 blows airflow, so that the airflow passes through all the first radiating fins 12 and the radiating fin tube 11, the bottom of the connecting ring tube 15 is communicated with the top of the radiating fin tube 11, the top of the connecting ring tube 15 is communicated with the bottom of the oil storage cavity 17 through a connecting tube 16, the lowermost end of the oil storage cavity 17 is positioned above the uppermost end of the connecting ring tube 15, and the lowest end of the connecting ring pipe 15 is positioned at the uppermost upper side of the radiating finned tube 11, so that the variable pressure oil in the oil storage cavity 17 completely flows into the connecting ring pipe 15 under the action of gravity, the oil conservator 18 is fixed at the top of the box cover 8 through the support 19, the oil storage cavity 17 is formed in one side of the oil conservator 18, the sliding groove 20 is formed in the other side of the oil conservator 18, the sealing plate 21 is slidably mounted in the sliding groove 20, the sealing plate 21 is hermetically mounted on one side of the metal expander 22, the other side of the metal expander 22 is hermetically mounted with the oil conservator 18, and the oil storage cavity 17 is communicated with the interior of the metal expander 22.
The working principle is as follows: when the oil-immersed transformer convenient for replacing the transformer oil is used, an external power supply is connected, the oil-immersed transformer is started, the iron core 2 and the winding 3 are electrified to generate heat and heat the surrounding transformer oil, the transformer oil is heated to expand, the expanded transformer oil rises to the interior of the radiating fin tube 11 right above, meanwhile, the transformer oil with lower temperature sinks to the periphery of the iron core 2 and the winding 3 to form heat convection and radiation, at the moment, the first radiating fin 12 and the second radiating fin 13 are matched to radiate the transformer oil in the oil-immersed transformer, once the heat productivity is larger, the radiating fan 14 is started, the air above the radiating fan 14 blows to uniformly flow through each radiating fin tube 11 and the first radiating fin 12, the radiating speed of the radiating fin tubes 11 and the first radiating fin 12 is improved, the radiating efficiency of the heat convection is greatly improved, the oil-immersed transformer convenient for replacing the transformer oil is more practical to use, and when the transformer oil is heated to expand, the volume of the transformer oil in the oil-immersed transformer oil is increased, the metal expander 22 is extruded under the action of pressure, the metal expander 22 expands, similarly, when the transformer oil is cooled and shrunk, the metal expander 22 contracts under the action of negative pressure, when the metal expander 22 expands and contracts, the sealing plate 21 slides along the sliding groove 20 to play a role of supporting the metal expander 22, meanwhile, the temperature compensation structure is not provided with a part communicated with the outside, the transformer oil is prevented from being polluted by external oxygen and moisture, the service life of the transformer oil is prolonged, when the transformer oil needs to be replaced, the control valve 7 is opened, the spiral guide plate 5 guides the flow track of the transformer oil, the transformer oil spirally flows out of the oil drainage port 6, and meanwhile, the spirally-flowing transformer oil is convenient to be rolled up and wraps impurities in the oil tank 1, so that the cleaning of the oil tank 1 is completed when the transformer oil is emptied, and the manual cleaning is not needed, it is convenient to use and this completes the entire work, and what is not described in detail in this specification is prior art to those skilled in the art.
The terms "central," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for simplicity of description only and are not intended to indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operative in a particular orientation, and are not to be considered limiting of the claimed invention.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (9)
1. The utility model provides an oil-immersed transformer convenient to change transformer oil, includes oil tank (1), case lid (8), conservator (18), metal expander (22) and bolt (27), its characterized in that:
an iron core (2) is fixedly installed inside the oil tank (1), a winding (3) is wrapped on the outer side of the iron core (2), a funnel (4) is fixedly communicated with the bottom of the oil tank (1), a spiral guide plate (5) is installed on the inner side of the funnel (4), an oil drainage opening (6) is formed in the bottom of the funnel (4), a control valve (7) is installed inside the oil drainage opening (6), a low-voltage sleeve (9) is installed on one side of the tank cover (8), and a high-voltage sleeve (10) is installed on the other side of the tank cover (8);
the oil tank is characterized in that the tank cover (8) is attached to the top of the oil tank (1), a plurality of radiating finned tubes (11) are fixed to the top of the tank cover (8), the bottoms of the radiating finned tubes (11) are communicated with the oil tank (1), first radiating fins (12) penetrate through the radiating finned tubes (11), second radiating fins (13) penetrate through the outer side of the oil tank (1), a radiating fan (14) is installed at the top of each radiating finned tube (11), a connecting ring tube (15) is arranged on the outer side of each radiating fan (14), the bottom of each connecting ring tube (15) is communicated with the top of each radiating finned tube (11), and the top of each connecting ring tube (15) is communicated with the bottom of the oil storage cavity (17) through a connecting tube (16);
the oil conservator (18) is fixed at the top of the tank cover (8) through a support (19), an oil storage cavity (17) is formed in one side of the oil conservator (18), a sliding groove (20) is formed in the other side of the oil conservator (18), a sealing plate (21) is arranged in the sliding groove (20), the sealing plate (21) is arranged in one side of a metal expander (22) in a sealing mode, the other side of the metal expander (22) is arranged in the oil conservator (18) in a sealing mode, and the oil storage cavity (17) is communicated with the interior of the metal expander (22) simultaneously.
2. The oil-filled transformer convenient for changing transformer oil of claim 1, characterized in that: the oil tank (1) is cylindrical, and the center line of the oil tank (1) coincides with the center line of the funnel (4) and the center line of the oil drainage port (6).
3. The oil-filled transformer convenient for changing transformer oil of claim 1, characterized in that: the oil tank (1) outside is fixed with lower flange (23), and sets up recess (24) on lower flange (23) surface, recess (24) internally mounted has sealed pad (25), and sealed pad (25) laminating upper flange (26) bottom.
4. The oil-filled transformer convenient for changing transformer oil of claim 1, characterized in that: one sides of the plurality of radiating finned tubes (11) close to the center line of the oil tank (1) are communicated with each other, and the distances between the surfaces of the two sides of the first radiating fins (12) and the inner walls of the two sides of the radiating finned tubes (11) are the same.
5. The oil-filled transformer convenient for changing transformer oil of claim 1, characterized in that: the first radiating fins (12) and the radiating finned tubes (11) are radially arranged by taking the center line of the oil tank (1) as the center, and the first radiating fins (12) and the radiating finned tubes (11) are correspondingly arranged.
6. The oil-filled transformer convenient for changing transformer oil of claim 1, characterized in that: the second radiating fins (13) are radially arranged by taking the oil tank (1) as a center, and a certain gap is reserved between one end, close to the center of the oil tank (1), of each second radiating fin (13) and the winding (3).
7. The oil-filled transformer convenient for changing transformer oil of claim 1, characterized in that: the central line of the cooling fan (14) is superposed with the central line of the oil tank (1), the outer end of the cooling fan (14) is attached to the inner side of the connecting ring pipe (15), and the outermost end of the connecting ring pipe (15) and the outermost end of the cooling fin pipe (11) are located on the same vertical surface.
8. The oil-filled transformer convenient for changing transformer oil of claim 1, characterized in that: the lowest end of the oil storage cavity (17) is positioned above the uppermost end of the connecting ring pipe (15), and the lowest end of the connecting ring pipe (15) is positioned on the upper side of the uppermost end of the radiating finned pipe (11).
9. The oil-filled transformer convenient to change transformer oil of claim 3, characterized in that: the upper flange (26) is fixed on the outer side of the box cover (8), the bottom of the upper flange (26) is attached to the top of the lower flange (23), and the bolt (27) penetrates through the upper flange (26) and the lower flange (23) and is connected with the nut (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111468584.1A CN114300225B (en) | 2021-12-03 | 2021-12-03 | Oil immersed transformer convenient to change variable pressure oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111468584.1A CN114300225B (en) | 2021-12-03 | 2021-12-03 | Oil immersed transformer convenient to change variable pressure oil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114300225A true CN114300225A (en) | 2022-04-08 |
| CN114300225B CN114300225B (en) | 2023-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111468584.1A Active CN114300225B (en) | 2021-12-03 | 2021-12-03 | Oil immersed transformer convenient to change variable pressure oil |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204155741U (en) * | 2014-09-10 | 2015-02-11 | 南通市海王电气有限公司 | A kind of novel Power Plant Main Transformer |
| CN208753087U (en) * | 2018-09-21 | 2019-04-16 | 甘肃宏宇变压器有限公司 | A kind of energy conservation special transformer |
| CN214012689U (en) * | 2020-11-24 | 2021-08-20 | 许昌东美电气有限公司 | Energy-concerving and environment-protective oil-immersed transformer |
-
2021
- 2021-12-03 CN CN202111468584.1A patent/CN114300225B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204155741U (en) * | 2014-09-10 | 2015-02-11 | 南通市海王电气有限公司 | A kind of novel Power Plant Main Transformer |
| CN208753087U (en) * | 2018-09-21 | 2019-04-16 | 甘肃宏宇变压器有限公司 | A kind of energy conservation special transformer |
| CN214012689U (en) * | 2020-11-24 | 2021-08-20 | 许昌东美电气有限公司 | Energy-concerving and environment-protective oil-immersed transformer |
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| Publication number | Publication date |
|---|---|
| CN114300225B (en) | 2023-12-26 |
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