CN221507911U - Novel low-voltage coil air passage structure of dry-type transformer - Google Patents
Novel low-voltage coil air passage structure of dry-type transformer Download PDFInfo
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- CN221507911U CN221507911U CN202323179024.1U CN202323179024U CN221507911U CN 221507911 U CN221507911 U CN 221507911U CN 202323179024 U CN202323179024 U CN 202323179024U CN 221507911 U CN221507911 U CN 221507911U
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- low
- voltage
- row
- type transformer
- coil
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000011889 copper foil Substances 0.000 claims abstract description 31
- 238000009413 insulation Methods 0.000 claims abstract description 28
- 239000011229 interlayer Substances 0.000 claims abstract description 20
- 239000003822 epoxy resin Substances 0.000 claims abstract description 16
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 15
- 239000004744 fabric Substances 0.000 claims abstract description 7
- 239000003365 glass fiber Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims description 10
- 239000012212 insulator Substances 0.000 claims description 9
- 239000004593 Epoxy Substances 0.000 claims description 7
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 229920005989 resin Polymers 0.000 abstract description 2
- 239000011347 resin Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 10
- 229910052802 copper Inorganic materials 0.000 description 7
- 239000010949 copper Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000011810 insulating material Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Insulating Of Coils (AREA)
Abstract
The utility model belongs to the technical field of low-voltage coils, in particular to a novel low-voltage coil air flue structure of a dry-type transformer, which comprises a low-voltage inner row and a low-voltage outer row, wherein copper foils are welded at the tail ends of the low-voltage inner row and the low-voltage outer row, aluminum pipe stay has been placed jointly between the copper foil, the outside of copper foil is around being equipped with interlayer insulation, the outside of interlayer insulation is around being provided with glass fiber cloth belt and no weft tape. The structure of the utility model is different from the traditional low-voltage coil structure, the traditional structure adopts the epoxy resin I-shaped stay, the aluminum pipe stay is innovatively adopted, the aluminum pipe has heat conductivity, shielding is reduced compared with the resin stay adopted by the original structure, a certain heat dissipation area is increased, and the temperature rise of the coil is effectively reduced.
Description
Technical Field
The utility model relates to the technical field of low-voltage coils, in particular to a novel low-voltage coil air passage structure of a dry-type transformer.
Background
In order to enhance the moisture resistance, dust resistance and corrosion resistance of the dry-type transformer, improve the electrical strength of the dry-type transformer and prolong the service life of the dry-type transformer, the upper end face and the lower end face of the low-voltage coil of the dry-type transformer need to be subjected to end sealing treatment. For example, the invention patent with publication number CN108933032A discloses a low-voltage coil of a dry-type transformer, which comprises a coil, a presoaked DMD insulating material arranged between the coil layers and an air passage stay arranged between the coil layers, wherein the air passage stay supports the coil to form an air passage, the outer layer of the coil, the inner layer of the coil and two sides of the end part of the air passage are respectively provided with an epoxy plate, and a coil lead is led out by adopting a copper bar; the low-voltage coil of the dry-type transformer is arranged on the inner layer and the outer layer of the coil, and the epoxy plates are arranged on the two sides of the end part of the air passage, so that not only is the insulation function achieved, but also the air passage structure is stable, and the heat dissipation of the low-voltage coil of the dry-type transformer during operation is facilitated.
At present, the coil temperature rise of a dry-type transformer has great influence on the performance, service life, cost and the like of the transformer, when the cost is low, the temperature rise can be high, the performance and service life of the transformer are influenced, the cost is higher for ensuring the temperature rise, the temperature rise of the coil cannot be effectively reduced by the traditional epoxy resin stay, and the traditional epoxy resin stay has certain defects in environmental protection and performance. Therefore, improvements are needed.
Disclosure of utility model
The utility model aims to provide a novel low-voltage coil air passage structure of a dry-type transformer, which solves the problems that the temperature rise of a coil cannot be effectively reduced by a traditional epoxy resin stay, and the traditional epoxy resin stay has defects in environmental protection and performance.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a novel dry-type transformer low-voltage coil air flue structure, includes low pressure interior row and low pressure outer row, the copper foil has all been welded to the end of arranging in low pressure interior row and the low pressure outer row, aluminum pipe stay has been placed jointly between the copper foil, the outside of copper foil is around being equipped with interlayer insulation, the outside of interlayer insulation is around being provided with glass fiber cloth area and no weft tape.
Preferably, the interlayer insulation is DMD epoxy prepreg material. The DMD epoxy prepreg insulating material is used as an interlayer insulating material of the coil, and has good insulating effect.
Preferably, end insulation is commonly arranged at the end parts of the two copper foils, and an epoxy resin mixture is filled between the copper foils, and the epoxy resin mixture is positioned at the outer side of the interlayer insulation. By setting the epoxy resin mixture, the end parts of the two copper foils are sealed.
Preferably, an insulator is commonly arranged between the low-voltage inner row and the low-voltage outer row. By the arrangement of the insulators, support can be made from opposite sides of the low voltage inner row and the low voltage outer row.
Preferably, the outer sides of the low-pressure inner row and the low-pressure outer row are respectively sleeved with a heat shrinkage pipe. Through the arrangement of the heat shrinkage tube, the end parts of the low-voltage inner row and the low-voltage outer row are provided with an insulation protection function.
Preferably, an insulating tube is sleeved between the copper foil and the low-voltage inner row and between the copper foil and the low-voltage outer row. Through the setting of insulating tube, carry out insulation protection to the welding position of copper foil and low pressure interior row and low pressure outer row.
Compared with the prior art, the utility model has the following beneficial effects:
1. The structure of the utility model is different from the traditional low-voltage coil structure, the traditional structure adopts an epoxy resin I-shaped stay, an aluminum pipe stay is innovatively adopted, and the aluminum pipe has heat conductivity, so that shielding is reduced compared with a resin stay adopted by the original structure, a certain heat dissipation area is increased, and the temperature rise of the coil is effectively reduced;
2. According to the structure, the air passage adopts an aluminum pipe structure, the pipe is hollow, a plurality of small 'exhaust smoke pipes' are formed, the heat dissipation in the coil is greatly improved, the temperature of the coil is effectively reduced, and the coil is protected;
3. The structure of the utility model adopts the aluminum pipe for supporting, the skeleton effect is obvious, the impact bearing capacity is stronger, and the overall strength of the coil is better;
4. compared with the traditional unequal-height structure, the structure of the utility model adopts the equal-height structure of the head copper bars at the head and the tail, and the magnetic flux leakage of the copper bars is counteracted and the stray is smaller.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
fig. 2 is a top view of fig. 1 of the present utility model.
In the figure: 1. a low pressure inner row; 2. low pressure outer drainage; 3. copper foil; 4. interlayer insulation; 5. an epoxy resin mixture; 6. end insulation; 8. aluminum pipe stay; 9. an insulating tube; 10. an insulator; 11. glass fiber cloth belt; 12. a weft-free belt; 14. and (5) heat shrinking pipe.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1 and 2, a new low-voltage coil air flue structure of a dry-type transformer comprises a low-voltage inner row 1 and a low-voltage outer row 2, wherein copper foils 3 are welded at the tail ends of the low-voltage inner row 1 and the low-voltage outer row 2, aluminum pipe supporting strips 8 are jointly arranged between the copper foils 3, a plurality of aluminum pipe supporting strips 8 are arranged and uniformly arranged between two layers of copper foils 3, interlayer insulation 4 is wound on the outer side of the copper foils 3, and the interlayer insulation 4 is made of DMD epoxy prepreg. The DMD epoxy prepreg insulating material is used as the material for interlayer insulation 4 of the coil, and has good insulation effect. The outer side of the interlayer insulation 4 is wound with a glass fiber cloth belt 11 and a weft-free belt 12, and a layer of the glass fiber cloth belt 11 and the weft-free belt 12 are semi-overlapped to protect a coil and prevent rebound deformation.
Referring to fig. 1 and 2, end insulation 6 is commonly disposed at the ends of the two copper foils 3, and an epoxy resin mixture 5 is filled between the copper foils 3, wherein the epoxy resin mixture 5 is located outside the interlayer insulation 4. By the arrangement of the epoxy resin mixture 5, the sealing effect is provided for the ends of the two copper foils 3.
Referring to fig. 1 and 2, an insulator 10 is commonly disposed between a low-voltage inner row 1 and a low-voltage outer row 2. By the arrangement of the insulator 10, support can be made from opposite sides of the low-voltage inner row 1 and the low-voltage outer row 2. The outer sides of the low-pressure inner row 1 and the low-pressure outer row 2 are respectively sleeved with a heat shrinkage tube 14. By the arrangement of the heat shrink tube 14, the end parts of the low-voltage inner row 1 and the low-voltage outer row 2 have insulation protection effects. An insulating tube 9 is sleeved between the copper foil 3 and the low-voltage inner row 1 and the low-voltage outer row 2. By the arrangement of the insulating tube 9, the welding parts of the copper foil 3, the low-voltage inner row 1 and the low-voltage outer row 2 are insulated and protected.
The specific implementation process of the utility model is as follows: the whole winding of the low-voltage coil and the structure of the coil are the same as those of a conventional coil, the interlayer insulation 4 is firstly wound on a die, then the low-voltage inner row 1 is welded on the copper foil 3, after the welding is firm, the winding of the coil is carried out, and the flatness and the uniformity of the interlayer insulation 4 and the end insulation 6 are ensured in the winding; when the aluminum pipe is wound to a specified air passage position, the customized aluminum pipe stay bar 8 is uniformly placed between two layers of copper foil 3, and the placement of the aluminum pipe stay bar 8 is required to be arranged according to a drawing, so that a plurality of 'exhaust smoke pipes' effect is formed, and the heat dissipation capacity is enhanced; after the copper foil 3 is wound, the low-voltage outer row 2 is welded, so that the welding is firm, and the interlayer insulation 4 is wound; a layer of glass fiber cloth belt 11 and a non-woven belt 12 are semi-overlapped and wound, so that a coil is protected and rebound deformation is prevented; after lifting the coil, using an epoxy resin mixture 5 to carry out end sealing treatment; the inner and outer copper bars of the coil adopt a contour structure, so that the copper bars are saved, the inner and outer copper bars are fixed by using an insulator 10, and the inner and outer copper bars are insulated by using a heat shrinkage tube 14, so that the insulation effect is improved; an insulating tube 9 is placed on the right side of the coil.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a novel dry-type transformer low-voltage coil air flue structure, includes low-voltage inner row (1) and low-voltage outer row (2), its characterized in that: copper foil (3) is welded at the tail ends of the low-voltage inner row (1) and the low-voltage outer row (2), aluminum pipe stay (8) are commonly placed between the copper foil (3), interlayer insulation (4) is wound on the outer side of the copper foil (3), and glass fiber cloth strips (11) and weft-free strips (12) are wound on the outer side of the interlayer insulation (4).
2. A new dry-type transformer low-voltage coil airway structure as claimed in claim 1, wherein: the interlayer insulation (4) is made of DMD epoxy prepreg.
3. A new dry-type transformer low-voltage coil airway structure as claimed in claim 1, wherein: the end parts of the two copper foils (3) are provided with end insulators (6) together, an epoxy resin mixture (5) is filled between the copper foils (3), and the epoxy resin mixture (5) is located on the outer side of the interlayer insulator (4).
4. A new dry-type transformer low-voltage coil airway structure as claimed in claim 1, wherein: an insulator (10) is arranged between the low-voltage inner row (1) and the low-voltage outer row (2).
5. A new dry-type transformer low-voltage coil airway structure as claimed in claim 1, wherein: and heat shrinkage pipes (14) are sleeved on the outer sides of the low-pressure inner row (1) and the low-pressure outer row (2).
6. A new dry-type transformer low-voltage coil airway structure as claimed in claim 1, wherein: an insulating tube (9) is sleeved between the copper foil (3) and the low-voltage inner row (1) and the low-voltage outer row (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323179024.1U CN221507911U (en) | 2023-11-24 | 2023-11-24 | Novel low-voltage coil air passage structure of dry-type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323179024.1U CN221507911U (en) | 2023-11-24 | 2023-11-24 | Novel low-voltage coil air passage structure of dry-type transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221507911U true CN221507911U (en) | 2024-08-09 |
Family
ID=92124231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323179024.1U Active CN221507911U (en) | 2023-11-24 | 2023-11-24 | Novel low-voltage coil air passage structure of dry-type transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221507911U (en) |
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2023
- 2023-11-24 CN CN202323179024.1U patent/CN221507911U/en active Active
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