CN112466617A - Oil-immersed transformer easy to assemble and overhaul - Google Patents
Oil-immersed transformer easy to assemble and overhaul Download PDFInfo
- Publication number
- CN112466617A CN112466617A CN202011287993.7A CN202011287993A CN112466617A CN 112466617 A CN112466617 A CN 112466617A CN 202011287993 A CN202011287993 A CN 202011287993A CN 112466617 A CN112466617 A CN 112466617A
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- guide
- assemble
- oil
- guide groove
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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
- H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
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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
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/266—Fastening or mounting the core on casing or support
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention discloses an oil-immersed transformer easy to assemble and maintain.A guide sliding assembly is arranged between a transformer body and an oil tank bottom shell and comprises guide columns and guide groove members, the two guide columns are vertically and parallelly arranged, and the top and the bottom of each guide column are respectively and fixedly connected to the two ends of an upper clamping piece and a lower clamping piece of the transformer body; the two guide groove pieces are vertically arranged in parallel, and the guide groove pieces are fixedly connected to the inner side of the side wall of the oil tank bottom shell; the guide post can be guided and slidably connected in the notch of the guide groove piece. According to the oil-immersed transformer easy to assemble and maintain, the guide sliding assembly is arranged between the transformer body and the oil tank bottom shell, so that the smooth hoisting process can be ensured, the occurrence of collision and scratch is avoided, and the operation efficiency is improved.
Description
Technical Field
The invention relates to the technical field of oil-immersed transformers, in particular to an oil-immersed transformer easy to assemble and maintain.
Background
The body of the oil-immersed transformer comprises a winding and an iron core which are all arranged in an oil tank filled with transformer oil, and the oil tank is formed by welding steel plates. The oil tank of the medium and small-sized transformers consists of a tank shell and a tank cover, the transformer body of the transformer is placed in the tank shell, and the tank cover is opened to lift the transformer body out for maintenance.
When an existing oil-immersed transformer is assembled or overhauled, a transformer body and a box cover can be hoisted into or out of a bottom shell of an oil tank as a whole. Be provided with down location structure between ware body and the drain pan, traditional location structure is at the bottom welding threaded location nail of oil tank, trompil on the folder down, and when the ware body fell into the oil tank, lower location nail passed the trompil of folder down to location function under the realization. However, in the hoisting process, no guide mechanism is provided, so that collision is easy to occur, and the insulation of the winding or the iron core is affected. Therefore, the hoisting alignment process needs to be carefully and slowly carried out, the occurrence of scratching and collision is avoided, and the assembly and maintenance efficiency is seriously influenced.
Therefore, there is a need to develop an oil-filled transformer that is easy to assemble and service.
Disclosure of Invention
The invention aims to provide an oil-immersed transformer easy to assemble and maintain, and the oil-immersed transformer can ensure the smooth hoisting process, avoid collision and scratch and improve the operation efficiency by arranging a guide sliding assembly between a transformer body and an oil tank bottom shell.
In order to solve the technical problems, the invention adopts the following technical scheme:
according to the oil-immersed transformer easy to assemble and maintain, the guide sliding assembly is arranged between the transformer body and the oil tank bottom shell and comprises guide columns and guide groove members, the two guide columns are vertically arranged in parallel, and the top and the bottom of each guide column are fixedly connected to the two ends of an upper clamping piece and a lower clamping piece of the transformer body respectively; the two guide groove pieces are vertically arranged in parallel, and the guide groove pieces are fixedly connected to the inner side of the side wall of the oil tank bottom shell; the guide post can be guided and slidably connected in the notch of the guide groove piece.
Furthermore, the cross section of the guide post is circular, the notch of the guide groove piece is semicircular, and the guide post and the guide groove piece are matched and assembled correspondingly.
Furthermore, the guide post is fixedly connected to the upper clamp and the lower clamp of the transformer body through a connecting piece, one end of the connecting piece, which is far away from the guide post, is provided with two parallel supporting foot plates, and the supporting foot plates are connected with the clamps through an adjustable structure.
Furthermore, the adjustable structure comprises a bolt, a first waist-shaped hole and a second waist-shaped hole, the first waist-shaped hole is horizontally arranged at one end of the clamping piece, the second waist-shaped hole is vertically arranged on the supporting plate, and the bolt penetrates through the first waist-shaped hole and the second waist-shaped hole to lock the connecting piece on the clamping piece.
Furthermore, the adjustable structure further comprises an adjusting pad, the width of the two supporting foot plates is smaller than the distance between the two clamping pieces, the adjusting pad comprises a plurality of spacers with adjustable thicknesses, and the adjusting pad is connected to the bolt in a penetrating manner and connected between the outer side surfaces of the supporting foot plates and the inner side surfaces of the clamping pieces in a cushioning manner.
Further, the guide groove member is made of an insulating resin material.
Furthermore, a wear-resistant insulating layer is arranged on the groove of the guide groove piece, and the guide column is in sliding contact with the wear-resistant insulating layer.
Further, the guide post is provided with an insulating end.
Furthermore, the insulation end is a bottom column head made of an insulation resin material, a stud is arranged at the bottom of the guide column, a threaded sleeve is poured in the bottom column head, and the threaded sleeve is in threaded connection with the stud to coaxially connect the bottom column head to the bottom end of the guide column.
Furthermore, the bottom of the bottom column head is provided with a round ball head.
Compared with the prior art, the invention has the beneficial technical effects that:
according to the oil-immersed transformer easy to assemble and maintain, the guide sliding assembly is arranged between the transformer body and the oil tank bottom shell, so that the transformer body can be smoothly guided to accurately enter or be guided out of the oil tank bottom shell in the hoisting process during assembly, maintenance, disassembly and assembly, collision and scratch are avoided, tight observation and attention of operators in the prior art are avoided through guidance, the phenomenon that one side is large in gap and the other side is small in gap, the positioning structure cannot be accurately positioned easily is avoided, and the operation efficiency is low. Can guarantee that the hoist and mount process is smooth and easy, avoid appearing the collision and scratch, improve the operating efficiency.
In addition, the guide posts are fixedly connected to the upper clamp piece and the lower clamp piece of the transformer body through the arrangement of the connecting pieces, and the spatial positions of the connecting pieces can be finely adjusted through the arrangement of the adjustable structures, so that the positions of the guide posts can be adjusted; the adjustment of horizontal fore-and-aft direction can be carried out through the first waist type hole that the level set up, and through the setting in second waist type hole, the adjustment of direction of height can be carried out from top to bottom, and through the thickness change of adjustment pad, the adjustment of distance about can accomplishing. The guide groove piece made of the insulating resin material can ensure the insulating property between the iron core part of the transformer body and the oil tank bottom shell; through the setting of wear-resisting insulating layer, guaranteed the wearability of guide way spare notch, increased the dismouting number of times of equipment, improved equipment life. The bottom column head made of the insulating material can ensure the insulativity of the iron core part of the transformer body when the bottom column head contacts the bottom plate of the oil tank bottom shell; through the bottom column head bottom that sets up to round bulb, when can be convenient for the direction to insert, the notch that the accuracy entered into the guide way spare.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
Fig. 1 is a schematic sectional view of an oil-filled transformer of the present invention in a front view, which is easy to assemble and overhaul;
FIG. 2 is a schematic top view of the guide slide assembly of the present invention;
FIG. 3 is a partial sectional view of A-A in FIG. 2;
fig. 4 is a schematic cross-sectional structure view of the bottom end of the guide post of the present invention.
Description of reference numerals: 1. a transformer body; 101. a first kidney-shaped hole; 2. a bottom case of the oil tank; 3. a bolt; 4. a connecting member; 401. a second kidney-shaped hole; 5. a guide post; 501. a stud; 502. a threaded sleeve; 503. a bottom column head; 6. a guide channel member; 601. a wear layer; 7. and adjusting the cushion.
Detailed Description
The core of the invention is to provide the oil-immersed transformer which is easy to assemble and maintain, and the guide sliding assembly is arranged between the transformer body and the oil tank bottom shell, so that the smooth hoisting process can be ensured, the collision and scratch are avoided, and the operation efficiency is improved.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying 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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to the drawings, fig. 1 is a schematic sectional structure view in front view of an oil-immersed transformer easy to assemble and overhaul according to the invention; FIG. 2 is a schematic top view of the guide slide assembly of the present invention; FIG. 3 is a partial sectional view of A-A in FIG. 2; fig. 4 is a schematic cross-sectional structure view of the bottom end of the guide post of the present invention.
In a specific embodiment, as shown in fig. 1 to 3, in an oil-immersed transformer easy to assemble and maintain, a guiding sliding assembly is arranged between a transformer body 1 and an oil tank bottom shell 2, the guiding sliding assembly comprises guiding columns 5 and guiding groove members 6, the two guiding columns 5 are vertically arranged on two sides of the transformer body 1 in parallel, and the top and the bottom of the guiding columns 5 are respectively and fixedly connected to two ends of an upper clamp and a lower clamp of the transformer body 1. Two vertical parallel arrangement of guide way spare 6 are in the inside both sides of oil tank drain pan 2, and guide way spare 6 fixed connection is inboard at the lateral wall of oil tank drain pan 2, and guide way spare 6 is the insulating part. The guide post 5 can be slidably guided in a notch of the guide channel member 6.
Through setting up between transformer ware body 1 and oil tank drain pan 2 direction slip subassembly can be when assembly or maintenance dismouting, the hoist and mount in-process, and smooth and easy direction transformer ware body 1 accuracy gets into or derives oil tank drain pan 2, avoids appearing the collision and scratches, and through the direction, the tight observation of operating personnel among the prior art is avoided and is noticed, prevents that the big opposite side clearance in one side clearance is little, and location structure can not be accurate to go into the position under easy, and the operating efficiency is low. Can guarantee that the hoist and mount process is smooth and easy, avoid appearing the collision and scratch, improve the operating efficiency.
In one embodiment of the present invention, as shown in fig. 1 and 2, the guide post 5 has a circular cross section, and the slot of the guide channel member 6 has a semicircular shape, and they are fitted together. Obviously, the cross-sectional shapes of the guide post 5 and the guide slot member 6 may also take other shapes, such as a rectangle or a triangle, to achieve similar technical effects, and similar modifications fall within the scope of the present invention.
In an embodiment of the present invention, as shown in fig. 1 to 3, the guiding post 5 is fixedly connected to the upper and lower clamping pieces of the transformer body 1 through a connecting piece 4, one end of the connecting piece 4 away from the guiding post 5 is provided with two parallel supporting foot plates, and the supporting foot plates are connected to the clamping pieces through an adjustable structure.
Specifically, as shown in fig. 2 and 3, the adjustable structure includes a bolt 3, a first kidney-shaped hole 101 and a second kidney-shaped hole 401, the first kidney-shaped hole 101 is horizontally opened at one end of the clip, the second kidney-shaped hole 401 is vertically opened on the supporting board, and the bolt 3 passes through the first kidney-shaped hole 101 and the second kidney-shaped hole 401 to lock the connecting member 4 on the clip.
Specifically, as shown in fig. 2, the adjustable structure further includes an adjusting pad 7, the width of the two supporting plates is smaller than the distance between the two clamping pieces, the adjusting pad 7 includes a plurality of shims with adjustable thickness, and the adjusting pad 7 is threaded on the bolt 3 and is cushioned between the outer side surface of the supporting plate and the inner side surface of the clamping piece. The distance between the left and right sides of the connecting member 4 can be finely adjusted by changing the thickness of the adjusting pad 7.
The guide post 5 is fixedly connected to the upper clamp piece and the lower clamp piece of the transformer body 1 through the arrangement of the connecting piece 4, and the spatial position of the connecting piece 4 can be finely adjusted through the arrangement of the adjustable structure, so that the position of the guide post 5 is adjusted; the adjustment in the horizontal front-rear direction can be performed by the horizontally disposed first waist-shaped hole 101, the adjustment in the vertical height direction can be performed by the disposed second waist-shaped hole 401, and the adjustment in the left-right distance can be performed by the thickness change of the adjustment pad 7.
In one embodiment of the present invention, as shown in fig. 1 to 3, the guide channel member 6 is made of an insulating resin material such as an epoxy resin material.
Specifically, as shown in fig. 2 and 3, a wear-resistant insulating layer 601 is disposed on the slot of the guide groove member 6, the guide post 5 slidably contacts the wear-resistant insulating layer 601, and the wear-resistant insulating layer 601 is specifically made of a glass fiber reinforced epoxy resin material.
The guide groove piece 6 made of insulating resin material can ensure the insulating property between the iron core part of the transformer body 1 and the oil tank bottom shell 2; through the setting of wear-resisting insulating layer 601, guaranteed the wearability of 6 notches of guide way spare, increased the dismouting number of times of equipment, improved equipment life.
In one embodiment of the invention, the guide posts 5 are fitted with insulated terminations as shown in figures 1 and 4.
Specifically, as shown in fig. 4, the insulation end is a bottom column head 503 made of an insulation resin material, such as an epoxy resin material, a stud 501 is arranged at the bottom of the guide column 5, a threaded sleeve 502 is cast in the bottom column head 503, and the threaded sleeve 502 is in threaded connection with the stud 501 to coaxially connect the bottom column head 503 to the bottom end of the guide column 5.
Specifically, as shown in fig. 4, the bottom of the bottom column head 503 is provided with a round head.
The bottom column head 503 made of insulating materials can ensure the insulativity of the iron core part of the transformer body 1 when the bottom column head 503 contacts the bottom plate of the oil tank bottom shell 2; through the bottom column head 503 bottom that sets up to round bulb, when can be convenient for the direction to insert, the notch that the accuracy entered into guide way spare 6.
According to the oil-immersed transformer easy to assemble and maintain, the guiding sliding assembly is arranged between the transformer body 1 and the oil tank bottom shell 2, so that the transformer body 1 can be smoothly guided to accurately enter or be guided out of the oil tank bottom shell 2 in the hoisting process during assembly, maintenance, disassembly and assembly, collision and scratch are avoided, tight observation and attention of operators in the prior art are avoided through guiding, the phenomenon that one side is large in gap and the other side is small in gap is prevented, the positioning structure cannot be accurately positioned easily, and the operation efficiency is low. Can guarantee that the hoist and mount process is smooth and easy, avoid appearing the collision and scratch, improve the operating efficiency. In addition, the guide post 5 is fixedly connected to the upper and lower clamping pieces of the transformer body 1 through the arrangement of the connecting piece 4, and the spatial position of the connecting piece 4 can be finely adjusted through the arrangement of the adjustable structure, so that the position of the guide post 5 is adjusted; the adjustment in the horizontal front-rear direction can be performed by the horizontally disposed first waist-shaped hole 101, the adjustment in the vertical height direction can be performed by the disposed second waist-shaped hole 401, and the adjustment in the left-right distance can be performed by the thickness change of the adjustment pad 7. The guide groove piece 6 made of insulating resin material can ensure the insulating property between the iron core part of the transformer body 1 and the oil tank bottom shell 2; through the setting of wear-resisting insulating layer 601, guaranteed the wearability of 6 notches of guide way spare, increased the dismouting number of times of equipment, improved equipment life. The bottom column head 503 made of insulating materials can ensure the insulativity of the iron core part of the transformer body 1 when the bottom column head 503 contacts the bottom plate of the oil tank bottom shell 2; through the bottom column head 503 bottom that sets up to round bulb, when can be convenient for the direction to insert, the notch that the accuracy entered into guide way spare 6.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the scope of the present invention is defined by the claims.
Claims (10)
1. The utility model provides an easily assemble and overhaul oil-immersed transformer which characterized in that: a guide sliding assembly is arranged between the transformer body (1) and the oil tank bottom shell (2), the guide sliding assembly comprises guide columns (5) and guide groove pieces (6), the two guide columns (5) are vertically arranged in parallel, and the top and the bottom of each guide column (5) are respectively and fixedly connected to two ends of an upper clamping piece and a lower clamping piece of the transformer body (1); the two guide groove pieces (6) are vertically arranged in parallel, and the guide groove pieces (6) are fixedly connected to the inner side of the side wall of the oil tank bottom shell (2); the guide post (5) can be guided and slidably connected in the notch of the guide groove piece (6).
2. Oil filled transformer easy to assemble and service according to claim 1, characterized by: the cross section of the guide post (5) is circular, the notch of the guide groove piece (6) is semicircular, and the guide post and the guide groove piece are matched and assembled correspondingly.
3. Oil filled transformer easy to assemble and service according to claim 2, characterized in that: the guide post (5) is fixedly connected to an upper clamp and a lower clamp of the transformer body (1) through a connecting piece (4), one end, far away from the guide post (5), of the connecting piece (4) is provided with two parallel supporting foot plates, and the supporting foot plates are connected with the clamps through an adjustable structure.
4. Oil filled transformer easy to assemble and service according to claim 1, characterized by: adjustable structure includes bolt (3), first waist type hole (101) and second waist type hole (401), first waist type hole (101) level is seted up the one end of folder, the vertical division of second waist type hole (401) is in prop up on the sole, bolt (3) pass first waist type hole (101) and second waist type hole (401) will connecting piece (4) lock is in on the folder.
5. Oil filled transformer easy to assemble and service according to claim 4, characterized by: the adjustable structure further comprises an adjusting pad (7), the width of the two supporting foot plates is smaller than the distance between the two clamping pieces, the adjusting pad (7) comprises a plurality of spacers with adjustable thicknesses, and the adjusting pad (7) penetrates through the bolt (3) and is connected between the outer side face of the supporting foot plate and the inner side face of the clamping piece in a pad mode.
6. Oil filled transformer easy to assemble and service according to claim 1, characterized by: the guide groove piece (6) is made of an insulating resin material.
7. Oil filled transformer easy to assemble and service according to claim 6, characterized by: and a wear-resistant insulating layer (601) is arranged on the groove of the guide groove piece (6), and the guide column (5) is in sliding contact with the wear-resistant insulating layer (601).
8. Oil filled transformer easy to assemble and service according to claim 1, characterized by: and the guide post (5) is provided with an insulating end.
9. Oil filled transformer easy to assemble and service according to claim 8, characterized by: the insulation end is a bottom column head (503) made of insulation resin materials, a stud (501) is arranged at the bottom of the guide column (5), a threaded sleeve (502) is poured in the bottom column head (503), and the threaded sleeve (502) is in threaded connection with the stud (501) to coaxially connect the bottom column head (503) to the bottom end of the guide column (5).
10. Oil filled transformer easy to assemble and service according to claim 9, characterized by: the bottom of the bottom column head (503) is provided with a round ball head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011287993.7A CN112466617B (en) | 2020-11-17 | 2020-11-17 | Oil-immersed transformer easy to assemble and overhaul |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011287993.7A CN112466617B (en) | 2020-11-17 | 2020-11-17 | Oil-immersed transformer easy to assemble and overhaul |
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| Publication Number | Publication Date |
|---|---|
| CN112466617A true CN112466617A (en) | 2021-03-09 |
| CN112466617B CN112466617B (en) | 2021-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011287993.7A Active CN112466617B (en) | 2020-11-17 | 2020-11-17 | Oil-immersed transformer easy to assemble and overhaul |
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Citations (12)
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| JPH05283241A (en) * | 1992-04-01 | 1993-10-29 | Toshiba Corp | Gas-insulated transformer |
| CN201478047U (en) * | 2009-08-01 | 2010-05-19 | 三变科技股份有限公司 | Body positioning structure for oil-immersed type transformer |
| CN203013444U (en) * | 2012-12-13 | 2013-06-19 | 天威保变(合肥)变压器有限公司 | A lower portion positioning structure used when power transformer is put into oil tank |
| CN203673954U (en) * | 2014-02-13 | 2014-06-25 | 保定天威集团特变电气有限公司 | Drum type oil tank transformer body locating structure |
| CN204289016U (en) * | 2014-08-11 | 2015-04-22 | 中国西电电气股份有限公司 | A kind of transformer body lower part positioning device |
| JP5720471B2 (en) * | 2011-07-28 | 2015-05-20 | 株式会社デンソー | Magnetic component unit |
| CN204614607U (en) * | 2015-05-12 | 2015-09-02 | 福建安顺变压器有限公司 | A kind of transformer oil tank structure |
| CN205406234U (en) * | 2016-03-17 | 2016-07-27 | 温州凯唐电子科技有限公司 | Dry -type transformer lifts by crane structure |
| CN205845644U (en) * | 2016-06-07 | 2016-12-28 | 广东瑞智电力科技有限公司 | It is easy to the oil-filled transformer of device body location |
| CN206697326U (en) * | 2017-05-04 | 2017-12-01 | 巨邦集团有限公司 | Amorphous alloy oil immersion type transformer |
| CN207883458U (en) * | 2018-02-27 | 2018-09-18 | 河北天域九五电气有限公司 | Easy-to-mount oil transformer |
| CN210865804U (en) * | 2019-12-06 | 2020-06-26 | 吴江变压器有限公司 | Transformer body lower part location structure |
-
2020
- 2020-11-17 CN CN202011287993.7A patent/CN112466617B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05283241A (en) * | 1992-04-01 | 1993-10-29 | Toshiba Corp | Gas-insulated transformer |
| CN201478047U (en) * | 2009-08-01 | 2010-05-19 | 三变科技股份有限公司 | Body positioning structure for oil-immersed type transformer |
| JP5720471B2 (en) * | 2011-07-28 | 2015-05-20 | 株式会社デンソー | Magnetic component unit |
| CN203013444U (en) * | 2012-12-13 | 2013-06-19 | 天威保变(合肥)变压器有限公司 | A lower portion positioning structure used when power transformer is put into oil tank |
| CN203673954U (en) * | 2014-02-13 | 2014-06-25 | 保定天威集团特变电气有限公司 | Drum type oil tank transformer body locating structure |
| CN204289016U (en) * | 2014-08-11 | 2015-04-22 | 中国西电电气股份有限公司 | A kind of transformer body lower part positioning device |
| CN204614607U (en) * | 2015-05-12 | 2015-09-02 | 福建安顺变压器有限公司 | A kind of transformer oil tank structure |
| CN205406234U (en) * | 2016-03-17 | 2016-07-27 | 温州凯唐电子科技有限公司 | Dry -type transformer lifts by crane structure |
| CN205845644U (en) * | 2016-06-07 | 2016-12-28 | 广东瑞智电力科技有限公司 | It is easy to the oil-filled transformer of device body location |
| CN206697326U (en) * | 2017-05-04 | 2017-12-01 | 巨邦集团有限公司 | Amorphous alloy oil immersion type transformer |
| CN207883458U (en) * | 2018-02-27 | 2018-09-18 | 河北天域九五电气有限公司 | Easy-to-mount oil transformer |
| CN210865804U (en) * | 2019-12-06 | 2020-06-26 | 吴江变压器有限公司 | Transformer body lower part location structure |
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| CN112466617B (en) | 2021-12-03 |
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