CN112786285A - Transformer winding with efficient heat dissipation structure - Google Patents
Transformer winding with efficient heat dissipation structure Download PDFInfo
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- CN112786285A CN112786285A CN202110029126.1A CN202110029126A CN112786285A CN 112786285 A CN112786285 A CN 112786285A CN 202110029126 A CN202110029126 A CN 202110029126A CN 112786285 A CN112786285 A CN 112786285A
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- 238000004804 winding Methods 0.000 title claims abstract description 53
- 230000017525 heat dissipation Effects 0.000 title claims abstract description 51
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000001816 cooling Methods 0.000 claims abstract description 32
- 230000007246 mechanism Effects 0.000 claims abstract description 27
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 2
- 239000003381 stabilizer Substances 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 11
- 238000009413 insulation Methods 0.000 abstract description 11
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000191 radiation effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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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
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/085—Cooling by ambient air
-
- 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
- H01F27/2876—Cooling
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Housings And Mounting Of Transformers (AREA)
Abstract
The invention discloses a transformer winding with a high-efficiency heat dissipation structure, which comprises a box body, wherein the bottom of the inner wall of the box body is fixedly connected with two support legs, the tops of the support legs are fixedly connected with a frame body, the top of the frame body is in an open shape, the top of the frame body is provided with an upper cover body, three iron core windings are arranged between the bottom of the upper cover body and the top of the frame body, the surfaces of the three iron core windings are provided with three insulation cooling protection mechanisms, the iron core windings are arranged in the insulation cooling protection mechanisms, cooling oil can be divided after entering the box body through an oil tank through the arranged insulation cooling protection mechanisms, one part of the cooling oil can be injected into the box body, the other part of the cooling oil can flow into the space between an inner heat conducting plate and an outer ring baffle plate, and the heat dissipated by the iron core windings can be transmitted through the inner heat conducting, thereby achieving the effect of heat dissipation.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a transformer winding with an efficient heat dissipation structure.
Background
The power transformer is a static electric device, and is a device for changing a certain value of alternating voltage into another or several different values of voltage with the same frequency.
When the transformer runs, the heat generated by the loss in the winding and the iron core must be dissipated in time, so as to avoid the insulation damage caused by overheating, and for the small-capacity transformer, the ratio of the external surface area to the volume of the transformer is relatively large, a self-cooling mode can be adopted, the heat can be dissipated through radiation and natural convection, the self-cooling mode is suitable for an indoor small-sized transformer, the iron core and the winding of the large-capacity transformer are immersed in oil, so that the heat is dissipated through oil immersion, but when the iron core inside the existing transformer is in contact with the oil, most of the heat can be isolated by an insulating sleeve outside the existing transformer, so that the iron core winding cannot be sufficiently dissipated, and therefore the transformer winding with the efficient heat dissipation structure is provided, and the problem is solved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the transformer winding with the efficient heat dissipation structure, which has the advantages of good heat dissipation effect and the like, and solves the problem of poor heat dissipation effect of the traditional transformer iron core winding.
The invention discloses a transformer winding with an efficient heat dissipation structure, which comprises a box body, wherein an oil tank is installed on the right side of the top of the box body, an oil delivery pipe is fixedly communicated with the bottom of the oil tank and is communicated with the inner wall of the box body, an oil outlet pipe is fixedly communicated with the left side of the oil tank, a guide box is installed on the left side of the oil outlet pipe, a connecting pipe is fixedly communicated with the bottom of the guide box, a shunt box is fixedly communicated with the bottom of the connecting pipe and is fixedly connected with the top of the inner wall of the box body, two support legs are fixedly connected with the bottom of the inner wall of the box body, a frame body is fixedly connected with the tops of the support legs, the top of the frame body is in an open shape, an upper cover body is installed on the top of the frame body, three iron.
The transformer winding with the efficient heat dissipation structure comprises a sleeve, wherein an iron core winding is arranged in the sleeve, an inner heat conducting plate is fixedly connected to the inner wall of the sleeve, an outer ring baffle is further fixedly connected to the inner wall of the sleeve, a space is reserved between the outer ring baffle and the inner heat conducting plate, a fixed pipe is fixedly communicated with the top of the sleeve, an oil outlet valve is mounted at the bottom of the sleeve, an oil inlet pipe is communicated with the top of the fixed pipe, and the oil inlet pipe is communicated with a shunt box.
The transformer winding with the efficient heat dissipation structure is characterized in that an inner insulating layer is arranged between the inner wall of the sleeve and the outer ring baffle, and an outer insulating layer is sleeved on the surface of the sleeve.
The transformer winding with the efficient heat dissipation structure is characterized in that three outer heat dissipation mechanisms are mounted on the front face of the box body, three exhaust pipes are fixedly communicated with the top of each outer heat dissipation mechanism, the exhaust pipes are communicated with the inner wall of the box body, and a plurality of vent holes are formed in the top of the box body.
The transformer winding with the efficient heat dissipation structure comprises an outer heat dissipation mechanism, wherein the outer heat dissipation mechanism comprises an object placing plate, two fans for dissipating heat are arranged on the front face of the object placing plate, and the object placing plate is fixedly connected with the front face of a box body through supporting rods on the left side and the right side.
The transformer winding with the efficient heat dissipation structure is characterized in that the back surface of the object placing plate is fixedly connected with the connecting rod, the back surface of the connecting rod is fixedly connected with the connecting plate, the back surface of the connecting plate is fixedly connected with the attaching plate, and the back surface of the attaching plate is attached to the front surface of the box body.
The transformer winding with the efficient heat dissipation structure is characterized in that the attaching plate, the connecting rod and the connecting plate are made of copper.
The transformer winding with the efficient heat dissipation structure is characterized in that the left side and the right side of the shunt box are fixedly communicated with two oil inlet pipes, and the oil inlet pipes are used for injecting oil into the box body.
The transformer winding with the efficient heat dissipation structure is characterized in that the left side and the right side of the box body are fixedly connected with heat dissipation plates for heat dissipation.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, through the arranged insulation cooling protection mechanism, after cooling oil enters the box body through the oil tank, the cooling oil can be divided, one part of the cooling oil is injected into the box body, and the other part of the cooling oil can flow into the space between the inner temperature conducting plate and the outer ring baffle, so that heat emitted by the iron core winding can be transferred through the inner temperature conducting plate and taken away by the oil contacting with the inner temperature conducting plate, thereby achieving the heat dissipation effect, solving the problem that the inner iron core winding cannot be sufficiently dissipated due to the outer insulation sleeve of the traditional iron core winding, and enabling the heat dissipation effect of the iron core winding to be better.
2. According to the invention, through the arranged external heat dissipation mechanism, a worker can forcibly dissipate heat inside the box body through the fan arranged on the surface of the middle storage plate, so that heat can be exhausted from the box body through the exhaust pipe, thus the heat dissipation mode of the device is more various, and the heat dissipation effect is better.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic view of the overall front cross-sectional structure of the present invention;
FIG. 2 is a schematic view of the overall front view structure of the present invention;
FIG. 3 is a schematic overall side view of the present invention;
FIG. 4 is an enlarged view of the structure at A in FIG. 1;
FIG. 5 is a schematic view of a front cross-sectional structure of the insulation cooling protection mechanism of the present invention;
FIG. 6 is a schematic view of the insulation cooling protection mechanism according to the present invention;
fig. 7 is a schematic top sectional view of the insulation cooling protection mechanism of the present invention.
In the figure: 1. a box body; 2. an oil tank; 3. an oil delivery pipe; 4. an oil outlet pipe; 5. a guide box; 6. a connecting pipe; 7. a shunt box; 8. an oil inlet pipe; 9. a support leg; 10. a frame body; 11. an upper cover body; 12. an iron core winding; 13. an insulating cooling protection mechanism; 131. a sleeve; 132. an inner heat conducting plate; 133. an outer ring baffle; 134. a fixed tube; 135. an oil outlet valve; 136. an inner insulating layer; 137. an outer insulating layer; 14. an external heat dissipation mechanism; 141. a storage plate; 142. a support bar; 143. attaching a plate; 144. a connecting plate; 145. a connecting rod; 15. an exhaust pipe; 16. a heat sink.
Detailed Description
In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.
In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Example 1:
referring to fig. 1, 4, 5, 6 and 7, the cooling device comprises a box body 1, an oil tank 2 is installed on the right side of the top of the box body 1, an oil delivery pipe 3 is fixedly communicated with the bottom of the oil tank 2, the oil delivery pipe 3 is communicated with the inner wall of the box body 1, an oil outlet pipe 4 is fixedly communicated with the left side of the oil tank 2, a guide box 5 is installed on the left side of the oil outlet pipe 4, a connecting pipe 6 is fixedly communicated with the bottom of the guide box 5, a shunt box 7 is fixedly communicated with the bottom of the connecting pipe 6, the shunt box 7 is fixedly connected with the top of the inner wall of the box body 1, two support legs 9 are fixedly connected with the bottom of the inner wall of the box body 1, a frame body 10 is fixedly connected with the top of the support legs 9, the top of the frame body 10 is open, an upper cover body 11 is installed on the top of the frame body 10, iron core winding 12 sets up in insulating cooling protection mechanism 13, insulating cooling protection mechanism 13 includes sleeve 131, iron core winding 12 sets up in sleeve 131, lead warm plate 132 in the sleeve 131 inner wall fixedly connected with, sleeve 131's inner wall still fixedly connected with outer ring baffle 133, leave the space between outer ring baffle 133 and the interior warm plate 132 of leading, the fixed intercommunication in top of sleeve 131 has fixed pipe 134, oil outlet valve 135 is installed to sleeve 131's bottom, the top intercommunication of fixed pipe 134 has into oil pipe 8, it communicates with reposition of redundant personnel case 7 to advance oil pipe 8, the equal fixedly connected with in the left and right sides of box 1 is used for radiating heating panel 16.
An inner insulating layer 136 is arranged between the inner wall of the sleeve 131 and the outer ring baffle 133, and an outer insulating layer 137 is sleeved on the surface of the sleeve 131.
Through the above structure design, after the cooling oil enters the box body 1 through the oil tank 2, the cooling oil can be divided, one part of the cooling oil is injected into the box body 1, and the other part of the cooling oil can flow into the space between the inner heat conducting plate 132 and the outer ring baffle 133, so that the heat emitted by the iron core winding 12 can be transferred through the inner heat conducting plate 132 and is taken away by the oil contacting with the inner heat conducting plate 132, and the heat radiation effect is achieved.
Example 2:
referring to fig. 2 and 3, the front of the box body 1 is provided with three external heat dissipation mechanisms 14, the top of the external heat dissipation mechanism 14 is fixedly communicated with three exhaust pipes 15, the exhaust pipes 15 are communicated with the inner wall of the box body 1, the top of the box body 1 is provided with a plurality of vent holes, each external heat dissipation mechanism 14 comprises a storage plate 141, the front of the storage plate 141 is provided with two fans for dissipating heat, and the storage plate 141 is fixedly connected with the front of the box body 1 through support rods 142 at the left side and the right side.
Through the structural design, the working personnel can also radiate the inside of the box body 1 through the fan, hot air in the box body 1 is extracted through the exhaust pipe 15, and the oil-immersed radiating mode is matched, so that the overall radiating effect of the device is better, and the radiating mode is more various.
Example 3:
referring to fig. 3, a connecting rod 145 is fixedly connected to the back of the object placing plate 141, a connecting plate 144 is fixedly connected to the back of the connecting rod 145, an engaging plate 143 is fixedly connected to the back of the connecting plate 144, the back of the engaging plate 143 is engaged with the front of the box body 1, the engaging plate 143, the connecting rod 145 and the connecting plate 144 are made of copper, two oil inlet pipes 8 are fixedly communicated with the left and right sides of the flow dividing box 7, and the oil inlet pipes 8 are used for injecting oil into the box body 1.
Through the structure design, the laminating plate 143 can absorb heat to the surface of the box body 1, so that the surface of the box body 1 is cooled, and the surface of the box body 1 and the inner wall are rapidly cooled by matching the cooling of the upper fan and the exhaust pipe 15, so that the heat dissipation effect of the device is better.
In conclusion, this device is through setting up insulation cooling protection mechanism 13 on iron core winding 12 surface for the cooling oil can pass inner insulating layer 136 and outer insulating layer 137 and carry out iron core winding 12's contact, thereby reach radiating effect, the oil of pouring into simultaneously in the cooperation box 1 carries out high-efficient heat dissipation, makes iron core winding 12's radiating effect better, cooperates the positive outer heat dissipation mechanism 14 that sets up of box 1 simultaneously, carries out multiple heat dissipation to box 1
The working principle is as follows: firstly, a worker firstly installs a frame body 10 into a box body 1, then installs an iron core winding 12 on the frame body 10, then fixedly sleeves an insulation cooling protection mechanism 13 on the surface of the iron core winding 12, and finally installs an upper cover plate on the top of the frame body 10;
in the using process, the oil tank 2 injects cooling oil into the guide box 5 through the oil outlet pipe 4, injects the cooling oil into the connecting pipe 6 through the guide box 5, and finally enters the flow dividing box 7, the cooling liquid entering the flow dividing box 7 flows out from the five oil inlet pipes 8, the oil inlet pipes 8 positioned at the left side and the right side of the flow dividing box 7 directly introduce the oil into the box body 1, the oil inlet pipes 8 mutually communicated with the fixed pipes 134 inject the oil between the inner temperature guide plate 132 and the outer ring baffle 133, and the heat emitted by the iron core winding 12 in the using process can be simultaneously transferred to the temperature guide plate and adsorbed by the oil between the inner temperature guide plate 132 and the outer ring baffle 133 and also adsorbed by the oil injected into the box body 1, so that the heat radiation effect of the iron core winding 12 is better;
meanwhile, the fan on the surface of the object placing plate 141 can be started by a worker, so that heat generated by the iron core winding 12 in the box body 1 is discharged from the exhaust pipe 15, meanwhile, the attaching plate 143 can also perform sufficient adsorption on the temperature on the surface of the box body 1, heat dissipation is performed on the inner portion and the outer wall of the box body 1 simultaneously, and the whole heat dissipation effect of the device is better.
The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (9)
1. The utility model provides a possess high-efficient heat radiation structure transformer winding, includes the box, its characterized in that: the oil tank is installed on the right side at box top, the fixed intercommunication in bottom of oil tank has oil delivery pipe, and oil delivery pipe is linked together with the inner wall of box, the fixed intercommunication in left side of oil tank has an oil pipe, the guide box is installed in the left side of oil pipe, the fixed intercommunication in bottom of guide box has the connecting pipe, the fixed intercommunication in bottom of connecting pipe has the reposition of redundant personnel case, reposition of redundant personnel case fixed connection is in the top of box inner wall, two stabilizer blades of the bottom fixedly connected with of box inner wall, the top fixedly connected with framework of stabilizer blade, the top of framework is the opening form, the lid is installed at the top of framework, install three iron core winding, three between the bottom of going up the lid and the top of framework the surface mounting of iron core winding has three insulating cooling protection mechanism, and the iron core winding sets up in.
2. The transformer winding with high efficiency heat dissipation structure of claim 1, wherein: insulating cooling protection mechanism includes the sleeve, the iron core winding sets up in the sleeve, lead the warm plate in the sleeve inner wall fixedly connected with, telescopic inner wall is fixedly connected with outer loop baffle still, leave the space between outer loop baffle and the interior warm plate of leading, the fixed intercommunication in telescopic top has fixed pipe, the delivery valve is installed to telescopic bottom, the top intercommunication of fixed pipe has into oil pipe, advance oil pipe and reposition of redundant personnel case intercommunication.
3. The transformer winding with high efficiency heat dissipation structure of claim 2, wherein: an inner insulating layer is arranged between the inner wall of the sleeve and the outer ring baffle, and an outer insulating layer is sleeved on the surface of the sleeve.
4. The transformer winding with high efficiency heat dissipation structure of claim 1, wherein: the front of box is installed three outer heat dissipation mechanism, the fixed intercommunication in top of outer heat dissipation mechanism has three blast pipe, and the blast pipe is linked together with the inner wall of box, a plurality of air vents have been seted up at the top of box.
5. The transformer winding with high efficiency heat dissipation structure of claim 4, wherein: the outer heat dissipation mechanism comprises a storage plate, two fans used for heat dissipation are arranged on the front face of the storage plate, and the storage plate is fixedly connected with the front face of the box body through supporting rods on the left side and the right side.
6. The transformer winding with high efficiency heat dissipation structure of claim 5, wherein: the back fixedly connected with connecting rod of putting the thing board, the back fixedly connected with connecting plate of connecting rod, the back fixedly connected with rigging board of connecting plate, the back of rigging board is laminated with the front of box each other.
7. The transformer winding with high efficiency heat dissipation structure of claim 6, wherein: the attaching plate, the connecting rod and the connecting plate are all made of copper.
8. The transformer winding with high efficiency heat dissipation structure of claim 1, wherein: the left side and the right side of the flow dividing box are fixedly communicated with two oil inlet pipes, and the oil inlet pipes are used for injecting oil into the box body.
9. The transformer winding with high efficiency heat dissipation structure of claim 1, wherein: the left side and the right side of the box body are fixedly connected with radiating plates for radiating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110029126.1A CN112786285B (en) | 2021-01-11 | 2021-01-11 | Transformer winding with efficient heat dissipation structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110029126.1A CN112786285B (en) | 2021-01-11 | 2021-01-11 | Transformer winding with efficient heat dissipation structure |
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| Publication Number | Publication Date |
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| CN112786285A true CN112786285A (en) | 2021-05-11 |
| CN112786285B CN112786285B (en) | 2021-12-21 |
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|---|---|---|---|---|
| CN103578715A (en) * | 2012-08-10 | 2014-02-12 | Sts特种变压器斯多卡克股份有限公司 | Medium frequency transformer |
| 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 |
| CN205881654U (en) * | 2016-06-29 | 2017-01-11 | 中山市杰峰机电设备有限公司 | Oil -immersed transformer's installation of novel winding and cooling structure |
| CN206076000U (en) * | 2016-08-30 | 2017-04-05 | 申达电气集团有限公司 | A kind of high pressure linear descending furnace transformer |
| CN206471213U (en) * | 2017-02-28 | 2017-09-05 | 盐城天源电力设备有限公司 | A kind of Trigone post type iron core transformer |
| CN211628859U (en) * | 2020-04-30 | 2020-10-02 | 天长市泽丰电子有限公司 | Novel transformer convenient to heat dissipation |
| CN111834089A (en) * | 2020-07-09 | 2020-10-27 | 河北科博锐程电力工程有限公司 | Three-phase transformer based on stress protection structure |
| CN211858351U (en) * | 2020-04-10 | 2020-11-03 | 福建景川建设有限公司 | Multiple heat radiator for novel transformer |
| CN212182102U (en) * | 2020-05-29 | 2020-12-18 | 徐州科悦电子科技有限公司 | Oil-saving transformer oil tank for building |
| CN112151241A (en) * | 2020-09-17 | 2020-12-29 | 国家电网有限公司 | Auxiliary oil injection device for transformer |
-
2021
- 2021-01-11 CN CN202110029126.1A patent/CN112786285B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103578715A (en) * | 2012-08-10 | 2014-02-12 | Sts特种变压器斯多卡克股份有限公司 | Medium frequency transformer |
| 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 |
| CN205881654U (en) * | 2016-06-29 | 2017-01-11 | 中山市杰峰机电设备有限公司 | Oil -immersed transformer's installation of novel winding and cooling structure |
| CN206076000U (en) * | 2016-08-30 | 2017-04-05 | 申达电气集团有限公司 | A kind of high pressure linear descending furnace transformer |
| CN206471213U (en) * | 2017-02-28 | 2017-09-05 | 盐城天源电力设备有限公司 | A kind of Trigone post type iron core transformer |
| CN211858351U (en) * | 2020-04-10 | 2020-11-03 | 福建景川建设有限公司 | Multiple heat radiator for novel transformer |
| CN211628859U (en) * | 2020-04-30 | 2020-10-02 | 天长市泽丰电子有限公司 | Novel transformer convenient to heat dissipation |
| CN212182102U (en) * | 2020-05-29 | 2020-12-18 | 徐州科悦电子科技有限公司 | Oil-saving transformer oil tank for building |
| CN111834089A (en) * | 2020-07-09 | 2020-10-27 | 河北科博锐程电力工程有限公司 | Three-phase transformer based on stress protection structure |
| CN112151241A (en) * | 2020-09-17 | 2020-12-29 | 国家电网有限公司 | Auxiliary oil injection device for transformer |
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| CN112786285B (en) | 2021-12-21 |
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Effective date of registration: 20211207 Address after: 252000 No.38 jingsan Road, Fenghuang Industrial Park, Dongchangfu District, Liaocheng City, Shandong Province Applicant after: Xinda Transformer Co.,Ltd. Address before: Room 503-507, building a, no.998 Wusong Road, Wusongjiang science and Technology Industrial Park, Wuzhong District, Suzhou City, Jiangsu Province 215000 Applicant before: Li Jun |
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