CN117253699B - Oil immersed transformer core and transformer using same - Google Patents
Oil immersed transformer core and transformer using same Download PDFInfo
- Publication number
- CN117253699B CN117253699B CN202311521163.XA CN202311521163A CN117253699B CN 117253699 B CN117253699 B CN 117253699B CN 202311521163 A CN202311521163 A CN 202311521163A CN 117253699 B CN117253699 B CN 117253699B
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- Prior art keywords
- plate
- clamping frame
- block
- pushing
- groove
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 47
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 125000003003 spiro group Chemical group 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- 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
- H01F27/263—Fastening parts of the core together
-
- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
-
- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The invention relates to the technical field of transformers, in particular to an oil immersed transformer iron core and a transformer using the iron core, comprising: the surface of the iron core is provided with a first clamping frame and a second clamping frame; the surface of the extension plate is provided with a first screw rod, the surface of the first screw rod is provided with a pushing plate, the surface of the pushing plate is provided with a pushing rod, the end part of the pushing rod is provided with a limiting block, the surface of the second clamping frame is provided with an arc-shaped groove, and a moving rod is arranged in the arc-shaped groove; the transverse groove is arranged on the surface of the second clamping frame; the beneficial effects are as follows: after the multiple groups of iron cores are overlapped together, the second clamping frame and the first clamping frame are clamped on the surface of the iron cores, the end parts of the iron cores are clamped in clamping grooves on the surfaces of the first clamping frame and the second clamping frame, the first screw is screwed, so that the first screw is screwed on the surface of the extension plate, the limiting block is propped against the top of the iron cores, the multiple groups of iron cores are propped against in order, and the pushing plate is sleeved on the surface of the first screw.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to an oil immersed transformer iron core and a transformer using the same.
Background
The device for changing alternating voltage by using electromagnetic induction principle of the transformer comprises a primary coil, a secondary coil and an iron core (magnetic core), and has the main functions of: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformers);
in the prior art, a transformer core is arranged in a transformer with the application voltage below 220kv, and a coil is wound on the surface of the transformer core;
however, when winding the coils around the surface of the transformer core, since the surface of the core is smooth, the coils cannot be tightly wound when winding, gaps exist between the coils, and the gaps between the windings are large, resulting in poor insulation.
Disclosure of Invention
The invention aims to provide an oil immersed transformer iron core and a transformer using the same, so as to solve the problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: an oil immersed transformer core, comprising:
the surface of the iron core is provided with a first clamping frame and a second clamping frame;
the surface of the extension plate is provided with a first screw rod, the surface of the first screw rod is provided with a pushing plate, the surface of the pushing plate is provided with a pushing rod, the end part of the pushing rod is provided with a limiting block, the surface of the second clamping frame is provided with an arc-shaped groove, and a moving rod is arranged in the arc-shaped groove; and
And the transverse groove is arranged on the surface of the second clamping frame.
Preferably, the iron core is provided with the multiunit, and multiunit iron core overlaps together, and first holder and second holder are located two surfaces of iron core respectively, and the draw-in groove has been seted up on the surface of first holder and second holder, and the tip card of iron core is in the draw-in groove on first holder and second holder surface.
Preferably, the extension board is fixed at the tip of first holder and second holder, and the surface spiro union of extension board has first screw rod, and the annular has been seted up on the surface of first screw rod, and the push pedal is arranged in the annular, and the push pedal can rotate in the annular, and the fixed surface of push pedal has multiunit push rod, and the push rod rotates along with the push pedal, and the other end of push rod is fixed on the surface of stopper, and the stopper cover is established on the surface of first screw rod, and the stopper can rotate on the surface of first screw rod.
Preferably, the end of the arc-shaped groove is connected with the end of the transverse groove, a movable rod is inserted in the arc-shaped groove and can move in the arc-shaped groove, the movable rod can move into the transverse groove, a pushing block is inserted on the surface of the movable rod, the pushing block can move on the surface of the movable rod, the end of the pushing block is connected with a falling block, the falling block is inserted on the surface of the movable rod, the falling block can move on the surface of the movable rod, a spring is arranged in the movable rod and connected with the pushing block, and the spring has a pulling force on the pushing block.
Preferably, the pushing block moves along with the moving rod, the surface of the moving rod is provided with a plurality of groups of engaging grooves, and the plurality of groups of engaging grooves surround the surface of the moving rod.
Preferably, the cross slot is internally provided with a drop slot, the cross section shape of the drop slot is consistent with that of the drop block, and the drop block can be inserted into the drop slot.
Preferably, the movable groove is formed in the transverse groove, the stressed plate is inserted into the movable groove and can move in the movable groove, the surface of the stressed plate is inserted with the second screw rod, the limiting ring is arranged on the surface of the stressed plate, and the second screw rod can rotate in the stressed plate.
Preferably, the end part of the stress plate is inserted with a telescopic block, a spring is arranged in the stress plate, one end of the spring is connected with the end part of the telescopic block, the other end of the spring is connected with the inner part of the stress plate, the end part of the telescopic block is hinged with a wedge plate through a rotating shaft, and the wedge plate can rotate at the end part of the telescopic block through the rotating shaft.
Preferably, the surface of the telescopic block is fixedly provided with a jacking column, the surface of the jacking column is in contact with the surface of the engagement plate, the surface of the second clamping frame is provided with an opening, and the second screw rod is in threaded connection with the opening.
An oil immersed transformer comprises the oil immersed transformer iron core.
Compared with the prior art, the invention has the beneficial effects that:
after the multiple groups of iron cores are overlapped together, the second clamping frame and the first clamping frame are clamped on the surfaces of the iron cores, the end parts of the iron cores are clamped in clamping grooves on the surfaces of the first clamping frame and the second clamping frame, the first screw rod is screwed, so that the first screw rod is screwed on the surface of the extension plate, the limiting block is propped on the top of the iron cores, multiple groups of iron cores are propped in order, the pushing plate is sleeved on the surface of the first screw rod, the pushing plate is propped on the surface of the limiting block, the limiting block is connected with the pushing plate through the pushing rod, the limiting block is positioned on the top of the iron cores, the coil is wound on the surfaces of the iron cores, the first clamping frame and the second clamping frame, the moving rod divides the coil into open parts, moves the moving rod, moves in the arc grooves, the moving rod rises, the moving rod is propped on the surface of the coil, the coil is pushed together, the moving rod moves to the position of the transverse groove, the falling block is inserted into the inner part of the moving rod, the thickness of the pushing block is reduced, a large gap is prevented, the moving rod is propped on the surface of the block in the moving process, the moving rod is propped against the inner part of the rotating plate, the rotating plate is made to be in the inner part of the sliding plate, the rotating plate is made to be in the position of the telescopic plate, the rotating plate is made to be in the telescopic plate, and the rotating plate is made to be in the position of the telescopic plate is in the position of the telescopic plate, and the rotating plate is made to be in the position of the telescopic plate.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic perspective view of a second clamping frame according to the present invention;
FIG. 3 is a schematic perspective view of a second clamping frame according to another embodiment of the present invention;
FIG. 4 is an enlarged schematic view of the structure shown in FIG. 2A;
FIG. 5 is an enlarged schematic view of the structure shown at B in FIG. 3;
FIG. 6 is a schematic perspective view of a movable rod according to the present invention;
fig. 7 is a schematic perspective view of a stress plate according to the present invention.
In the figure: iron core 1, first holder 2, second holder 3, extension board 4, draw-in groove 5, first screw rod 6, fall groove 7, horizontal groove 8, remove groove 9, trompil 10, second screw rod 11, arc groove 12, movable rod 13, push away piece 14, push pedal 15, push rod 16, stopper 17, atress board 18, spacing ring 19, fit groove 20, drop piece 21, fit plate 22, hold the post 23, telescopic block 24.
Detailed Description
In order to make the objects, technical solutions, and advantages of the present invention more apparent, the embodiments of the present invention will be further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are some, but not all, embodiments of the present invention, are intended to be illustrative only and not limiting of the embodiments of the present invention, and that all other embodiments obtained by persons of ordinary skill in the art without making any inventive effort are within the scope of the present invention.
Referring to fig. 1 to 7, the present invention provides a technical solution: an oil immersed transformer core, comprising: the iron core 1, the surface of the iron core 1 is provided with a first clamping frame 2 and a second clamping frame 3, the iron core 1 is provided with a plurality of groups, the iron cores 1 are overlapped, the first clamping frame 2 and the second clamping frame 3 are respectively positioned on two surfaces of the iron core 1, clamping grooves 5 are formed in the surfaces of the first clamping frame 2 and the second clamping frame 3, the end part of the iron core 1 is clamped in the clamping grooves 5 on the surfaces of the first clamping frame 2 and the second clamping frame 3, after the iron cores 1 are overlapped, the second clamping frame 3 and the first clamping frame 2 are clamped on the surface of the iron core 1, and the end part of the iron core 1 is clamped in the clamping grooves 5 on the surfaces of the first clamping frame 2 and the second clamping frame 3;
the extension plate 4, the surface of the extension plate 4 is provided with a first screw rod 6, the surface of the first screw rod 6 is provided with a push plate 15, the surface of the push plate 15 is provided with a push rod 16, the end part of the push rod 16 is provided with a limiting block 17, the surface of the second clamping frame 3 is provided with an arc groove 12, a movable rod 13 is arranged in the arc groove 12, the extension plate 4 is fixed at the end parts of the first clamping frame 2 and the second clamping frame 3, the surface of the extension plate 4 is in threaded connection with the first screw rod 6, the surface of the first screw rod 6 is provided with a ring groove, the push plate 15 is positioned in the ring groove, the push plate 15 can rotate in the ring groove, the surface of the push plate 15 is fixedly provided with a plurality of groups of push rods 16, the push rods 16 rotate along with the push plate 15, the other end of the push rod 16 is fixed at the surface of the limiting block 17, the limiting block 17 is sleeved on the surface of the first screw rod 6, the limiting block 17 can rotate on the surface of the first screw rod 6, the end of the arc groove 12 is connected with the end of the transverse groove 8, a movable rod 13 is inserted in the arc groove 12, the movable rod 13 can move into the transverse groove 8, a pushing block 14 is inserted on the surface of the movable rod 13, the pushing block 14 can move on the surface of the movable rod 13, the end of the pushing block 14 is connected with a dropping block 21, the dropping block 21 is inserted on the surface of the movable rod 13, the dropping block 21 can move on the surface of the movable rod 13, a spring is arranged in the movable rod 13 and is connected with the pushing block 14, the spring has a pulling force on the pushing block 14, the pushing block 14 moves along with the movable rod 13, the surface of the movable rod 13 is provided with a plurality of groups of engaging grooves 20, the plurality of groups of engaging grooves 20 surround the surface of the movable rod 13, the movable rod 13 divides a coil, the movable rod 13 moves so that the movable rod 13 moves in the arc groove 12, the movable rod 13 rises, the movable rod 13 is propped against the surface of the coil to push the coil together, the movable rod 13 moves to the position of the transverse groove 8, after the dropping block 21 is inserted into the dropping groove 7, the pushing block 14 is retracted into the movable rod 13, the thickness of the pushing block 14 is reduced, and a large gap is prevented from being generated;
the transverse groove 8 is arranged on the surface of the second clamping frame 3, the cross section of the transverse groove 8 is provided with a drop groove 7, the cross section of the drop groove 7 is consistent with the cross section of the drop block 21, the drop block 21 can be inserted into the drop groove 7, the inner part of the transverse groove 8 is provided with a moving groove 9, a stress plate 18 is inserted into the moving groove 9, the stress plate 18 can move in the moving groove 9, the surface of the stress plate 18 is inserted with a second screw 11, the surface of the second screw 11 is provided with a limiting ring 19, the limiting ring 19 is arranged on the surface of the stress plate 18, the second screw 11 can rotate in the stress plate 18, the end part of the stress plate 18 is inserted with a telescopic block 24, the inner part of the stress plate 18 is provided with a spring, the tip of flexible piece 24 is being connected to the one end of spring, the inside of atress board 18 is being connected to the other end, flexible piece 24's tip articulates through the pivot has the engaging plate 22, the engaging plate 22 can rotate through the pivot at flexible piece 24's tip, flexible piece 24's fixed surface has a jack post 23, the surface of jack post 23 contacts with the surface of engaging plate 22, trompil 10 has been seted up on the surface of second holder 3, second screw rod 11 spiro union is in trompil 10, the engaging plate 22 jacks at the surface of movable rod 13, and flexible piece 24 prevents that engaging plate 22 from excessively overturning, jack post 23 card is in the engaging groove 20, the position of movable rod 13 is fixed for the inseparable laminating of coil together.
After the iron cores 1 are overlapped together, the second clamping frame 3 and the first clamping frame 2 are clamped on the surface of the iron cores 1, the end parts of the iron cores 1 are clamped in clamping grooves 5 on the surfaces of the first clamping frame 2 and the second clamping frame 3, the first screw rod 6 is screwed on the surface of the extension plate 4, the limiting block 17 is propped against the top of the iron cores 1, the iron cores 1 are propped in order, the pushing plate 15 is sleeved on the surface of the first screw rod 6, the pushing plate 15 is propped against the surface of the limiting block 17, the limiting block 17 is connected with the pushing plate 16, the limiting block 17 is positioned at the top of the iron cores 1, the coils are wound on the surfaces of the iron cores 1, the first clamping frame 2 and the second clamping frame 3, the moving rod 13 separates the coils, the moving rod 13 moves in the arc-shaped groove 12, the moving rod 13 rises, the movable rod 13 is propped against the surface of the coil to push the coil together, the movable rod 13 moves to the position of the transverse groove 8, after the falling block 21 is inserted into the falling groove 7, the pushing block 14 is retracted into the movable rod 13, the thickness of the pushing block 14 is reduced to prevent a larger gap, the movable rod 13 is propped against the surface of the telescopic block 24 in the moving process, the telescopic block 24 is retracted into the inner part of the stressed plate 18, the engaging plate 22 rotates around the rotating shaft, the second screw 11 is screwed, the stressed plate 18 is driven to move by the second screw 11, the stressed plate 18 moves in the movable groove 9, the engaging plate 22 is propped against the surface of the movable rod 13, the telescopic block 24 prevents the engaging plate 22 from overturned, the propping column 23 is clamped in the engaging groove 20, and the position of the movable rod 13 is fixed, so that the coils are tightly adhered together.
While the foregoing has been described in terms of illustrative embodiments thereof, so that those skilled in the art may appreciate the present application, it is not intended to be limited to the precise embodiments so that others skilled in the art may readily utilize the present application to its various modifications and variations which are within the spirit and scope of the present application as defined and determined by the appended claims.
Claims (2)
1. An oil immersed transformer core which characterized in that: comprising the following steps:
the iron core (1), the surface of the iron core (1) is provided with a first clamping frame (2) and a second clamping frame (3);
the device comprises an extension plate (4), wherein a first screw rod (6) is arranged on the surface of the extension plate (4), a pushing plate (15) is arranged on the surface of the first screw rod (6), a pushing rod (16) is arranged on the surface of the pushing plate (15), a limiting block (17) is arranged at the end part of the pushing rod (16), an arc-shaped groove (12) is arranged on the surface of the second clamping frame (3), and a movable rod (13) is arranged in the arc-shaped groove (12); and
A transverse groove (8) arranged on the surface of the second clamping frame (3);
the iron core (1) is provided with a plurality of groups, the iron cores (1) of the plurality of groups are overlapped, the first clamping frame (2) and the second clamping frame (3) are respectively positioned on two surfaces of the iron core (1), clamping grooves (5) are formed in the surfaces of the first clamping frame (2) and the second clamping frame (3), and the end parts of the iron cores (1) are clamped in the clamping grooves (5) on the surfaces of the first clamping frame (2) and the second clamping frame (3);
the extension plate (4) is fixed at the end parts of the first clamping frame (2) and the second clamping frame (3), a first screw rod (6) is connected to the surface of the extension plate (4) in a threaded mode, an annular groove is formed in the surface of the first screw rod (6), a pushing plate (15) is located in the annular groove, the pushing plate (15) can rotate in the annular groove, a plurality of groups of pushing rods (16) are fixed on the surface of the pushing plate (15), the pushing rods (16) rotate along with the pushing plate (15), the other ends of the pushing rods (16) are fixed on the surface of a limiting block (17), the limiting block (17) is sleeved on the surface of the first screw rod (6), and the limiting block (17) can rotate on the surface of the first screw rod (6).
The end of the arc-shaped groove (12) is connected with the end of the transverse groove (8), a movable rod (13) is inserted into the arc-shaped groove (12), the movable rod (13) can move in the arc-shaped groove (12), the movable rod (13) can move into the transverse groove (8), a pushing block (14) is inserted into the surface of the movable rod (13), the pushing block (14) can move on the surface of the movable rod (13), the end of the pushing block (14) is connected with a falling block (21), the falling block (21) is inserted into the surface of the movable rod (13), the falling block (21) can move on the surface of the movable rod (13), a spring is arranged in the movable rod (13), the spring is connected with the pushing block (14), and the spring has a pulling force on the pushing block (14);
the pushing block (14) moves along with the moving rod (13), the surface of the moving rod (13) is provided with a plurality of groups of engaging grooves (20), and the plurality of groups of engaging grooves (20) surround the surface of the moving rod (13);
a drop groove (7) is formed in the transverse groove (8), the cross section shape of the drop groove (7) is consistent with that of the drop block (21), and the drop block (21) can be inserted into the drop groove (7);
a movable groove (9) is formed in the transverse groove (8), a stress plate (18) is inserted into the movable groove (9), the stress plate (18) can move in the movable groove (9), a second screw (11) is inserted into the surface of the stress plate (18), a limiting ring (19) is arranged on the surface of the second screw (11), the limiting ring (19) is arranged on the surface of the stress plate (18), and the second screw (11) can rotate in the stress plate (18);
the end part of the stress plate (18) is inserted with a telescopic block (24), a spring is arranged in the stress plate (18), one end of the spring is connected with the end part of the telescopic block (24), the other end of the spring is connected with the interior of the stress plate (18), the end part of the telescopic block (24) is hinged with a fit plate (22) through a rotating shaft, and the fit plate (22) can rotate at the end part of the telescopic block (24) through the rotating shaft;
the surface of the telescopic block (24) is fixedly provided with a jacking column (23), the surface of the jacking column (23) is in contact with the surface of the engaging plate (22), the surface of the second clamping frame (3) is provided with an opening (10), and the second screw rod (11) is in threaded connection with the opening (10).
2. An oil immersed transformer, characterized in that: an oil immersed transformer core comprising the above claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311521163.XA CN117253699B (en) | 2023-11-15 | 2023-11-15 | Oil immersed transformer core and transformer using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311521163.XA CN117253699B (en) | 2023-11-15 | 2023-11-15 | Oil immersed transformer core and transformer using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117253699A CN117253699A (en) | 2023-12-19 |
| CN117253699B true CN117253699B (en) | 2024-03-15 |
Family
ID=89126694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311521163.XA Active CN117253699B (en) | 2023-11-15 | 2023-11-15 | Oil immersed transformer core and transformer using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117253699B (en) |
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| KR20170141532A (en) * | 2016-06-15 | 2017-12-26 | 현대일렉트릭앤에너지시스템(주) | Oil immersed transformer |
| CN108335869A (en) * | 2018-05-07 | 2018-07-27 | 合肥徽鹏贸易有限责任公司 | A kind of stable type transformer core |
| CN111063527A (en) * | 2020-01-08 | 2020-04-24 | 山东省产品质量检验研究院 | Split dry type transformer |
| CN210429506U (en) * | 2019-09-18 | 2020-04-28 | 东瑞电气有限公司 | Oil-immersed transformer core |
| CN212062125U (en) * | 2020-06-28 | 2020-12-01 | 置源(上海)电气有限公司 | Fixing and protecting device for clamping piece of oil immersed transformer |
| CN216648028U (en) * | 2022-01-07 | 2022-05-31 | 雄县新帆电气制造有限公司 | Silicon steel iron core with good heat dissipation effect |
| CN114758863A (en) * | 2022-05-13 | 2022-07-15 | 广州城建职业学院 | Dry-type transformer with coil compact structure |
| CN115112600A (en) * | 2022-06-28 | 2022-09-27 | 南京市英苗科技有限公司 | Molecular weight detection equipment for nano-composite polypropylene special material |
| CN115440466A (en) * | 2022-10-17 | 2022-12-06 | 南通大学 | Transformer monitoring device |
| CN218647751U (en) * | 2022-12-13 | 2023-03-17 | 天津市万泰电子有限公司 | Novel three dry-type transformer iron cores |
| CN219188669U (en) * | 2023-04-10 | 2023-06-16 | 常州轩润机械科技有限公司 | Plate type self-expansion clamping device |
-
2023
- 2023-11-15 CN CN202311521163.XA patent/CN117253699B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20170141532A (en) * | 2016-06-15 | 2017-12-26 | 현대일렉트릭앤에너지시스템(주) | Oil immersed transformer |
| CN108335869A (en) * | 2018-05-07 | 2018-07-27 | 合肥徽鹏贸易有限责任公司 | A kind of stable type transformer core |
| CN210429506U (en) * | 2019-09-18 | 2020-04-28 | 东瑞电气有限公司 | Oil-immersed transformer core |
| CN111063527A (en) * | 2020-01-08 | 2020-04-24 | 山东省产品质量检验研究院 | Split dry type transformer |
| CN212062125U (en) * | 2020-06-28 | 2020-12-01 | 置源(上海)电气有限公司 | Fixing and protecting device for clamping piece of oil immersed transformer |
| CN216648028U (en) * | 2022-01-07 | 2022-05-31 | 雄县新帆电气制造有限公司 | Silicon steel iron core with good heat dissipation effect |
| CN114758863A (en) * | 2022-05-13 | 2022-07-15 | 广州城建职业学院 | Dry-type transformer with coil compact structure |
| CN115112600A (en) * | 2022-06-28 | 2022-09-27 | 南京市英苗科技有限公司 | Molecular weight detection equipment for nano-composite polypropylene special material |
| CN115440466A (en) * | 2022-10-17 | 2022-12-06 | 南通大学 | Transformer monitoring device |
| CN218647751U (en) * | 2022-12-13 | 2023-03-17 | 天津市万泰电子有限公司 | Novel three dry-type transformer iron cores |
| CN219188669U (en) * | 2023-04-10 | 2023-06-16 | 常州轩润机械科技有限公司 | Plate type self-expansion clamping device |
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| Publication number | Publication date |
|---|---|
| CN117253699A (en) | 2023-12-19 |
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