CN219873107U - Novel main insulation system oil-immersed transformer of 20kV level - Google Patents
Novel main insulation system oil-immersed transformer of 20kV level Download PDFInfo
- Publication number
- CN219873107U CN219873107U CN202321340449.3U CN202321340449U CN219873107U CN 219873107 U CN219873107 U CN 219873107U CN 202321340449 U CN202321340449 U CN 202321340449U CN 219873107 U CN219873107 U CN 219873107U
- Authority
- CN
- China
- Prior art keywords
- voltage
- insulation
- coil
- low
- stay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000009413 insulation Methods 0.000 title claims abstract description 60
- 239000011087 paperboard Substances 0.000 claims abstract description 35
- 238000010030 laminating Methods 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 5
- 230000009194 climbing Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Insulating Of Coils (AREA)
Abstract
The utility model discloses a novel 20 kV-level oil-immersed transformer with a main insulation structure, which comprises a high-voltage coil and a low-voltage coil arranged in the high-voltage coil, wherein a main air channel is arranged between the high-voltage coil and the low-voltage coil, a curtain type oil duct is arranged in the main air channel, the curtain type oil duct comprises a first insulation paper board, and high-voltage stays close to the high-voltage coil and low-voltage stays attached to the low-voltage coil are respectively arranged on the end surfaces of two sides of the first insulation paper board; the high-voltage stays with the low-voltage stays one-to-one sets up, all winds first insulation board is the ring and arranges, and high-voltage stay both ends tip is shorter than low-voltage stay both ends tip 6~8mm. According to the utility model, the gap type curtain type oil duct is formed by the high-pressure stay and the low-pressure stay with the height difference arranged on the two sides of the first insulating paperboard, so that the climbing distance between the high pressure and the low pressure is increased, the transverse flow of oil at the end part of the coil is facilitated, and the heat dissipation function of the coil is enhanced.
Description
Technical Field
The utility model belongs to the technical field of transformers, and particularly relates to a novel 20 kV-level oil-immersed transformer with a main insulation structure.
Background
The existing 20 kV-level oil immersed transformer is increased in creepage distance, the distance between a high-voltage main channel and a low-voltage main channel is at least 13mm, and an angle ring is arranged at the end part so as to strengthen the insulation strength of the end part. When the distance between the main channels is at least 13mm, the outer diameter of the coil is larger, material saving is not facilitated, and the whole structure is larger. And the stay structures on two sides of the insulating paper board of the existing main air channel are consistent, so that the heat dissipation of the coil is not facilitated.
Disclosure of Invention
The utility model aims to provide a novel 20 kV-level oil-immersed transformer with a main insulation structure, which increases the climbing distance between high and low voltages, improves the insulation strength of unit distance and reduces the distance between the high and low voltages by arranging a notch curtain type oil duct, thereby solving the problems that the existing 20 kV-level oil-immersed transformer is large in volume, is not beneficial to material saving and is poor in heat dissipation. In order to achieve the purpose, the specific technical scheme of the utility model is as follows:
the utility model provides a novel main insulation structure oil-immersed transformer of 20kV level, includes high-voltage coil and sets up the low-voltage coil in the high-voltage coil, sets up main air duct between high-voltage coil and the low-voltage coil, sets up the curtain oil duct in the main air duct, the curtain oil duct includes first insulation board, first insulation board both sides terminal surface set up respectively with the high-voltage stay that the high-voltage coil is close to and with the low-voltage stay of laminating of low-voltage coil; the high-voltage stays with the low-voltage stays one-to-one sets up, all winds first insulation board is the ring and arranges, and high-voltage stay both ends tip is shorter than low-voltage stay both ends tip 6~8mm.
Specifically, the width of the high-pressure stay is 3.5-4.5 mm.
Specifically, the width of the low-pressure stay is 3.5-4.5 mm.
Further, a second insulating paper board is arranged between the high-voltage stay and the high-voltage coil, an oil duct notch is formed between the second insulating paper board and the high-voltage stay, a first small oil gap is formed between the second insulating paper board and the first insulating paper board, and a second small oil gap is formed between the first insulating paper board and the low-voltage coil.
Further, the high-voltage coil is sequentially wound with a first layer of coil, a second layer of coil and an N layer of coil from inside to outside, wherein N is a positive integer larger than 3, each layer of coil comprises a wire section in the middle and insulation sections arranged at two ends of the wire section, the insulation sections of the first three layers of coils or the first four layers of coils are widened insulation sections, the insulation sections of other layers of high-voltage coils are ordinary insulation sections, and the thickness of the widened insulation sections is larger than that of the ordinary insulation sections.
Specifically, the thickness of the second insulating paperboard is 1mm.
Specifically, the thickness of the first insulating paperboard is 1mm.
Specifically, the width of the main channel is 9-11 mm.
Compared with the prior art, the utility model has the following advantages:
(1) The gap type curtain type oil duct is formed by the high-pressure stay and the low-pressure stay with the height difference on the two sides of the first insulating paperboard, so that the climbing distance between the high pressure and the low pressure is increased, the transverse flow of oil at the end part of the coil is facilitated, and the heat dissipation function of the coil is enhanced;
(2) By arranging the first small oil gap and the second small oil gap, a thin insulating cylinder small oil gap structure is formed, the insulating strength of unit distance is improved, and the distance between a main channel and a low channel is reduced;
(3) The insulation sections of the front 3-4 layers of the high-voltage coil are insulated in a widened mode, and the creepage distance between high voltage and low voltage is increased;
(4) The distance between the high-low voltage main air channel and the low-low voltage main air channel is 9-11 mm, so that the outer diameter of a coil is smaller, materials and copper wires are saved, and the loss is reduced; compared with the prior transformer, the transformer omits a complicated corner ring structure, and has better manufacturability.
Drawings
FIG. 1 is a schematic top view of the present utility model;
FIG. 2 is a cross-sectional view A-A of FIG. 1 in accordance with the present utility model;
fig. 3 is a view showing a structure of a curtain type oil passage according to the present utility model.
In the figure: 1-first insulating paper board, 2-second insulating paper board, 3-high voltage stay, 4-low voltage stay, 10-high voltage coil, 11-wire section, 12-insulating section, 121-ordinary type insulating section, 122-widened type insulating section, 20-low voltage coil, 100-first small oil gap and 200-second small oil gap.
Detailed Description
The utility model further provides a 20kV novel main insulation structure oil-immersed transformer with a combination of drawings.
The oil immersed transformer with the novel 20 kV-level main insulation structure comprises a high-voltage coil 10 and a low-voltage coil 20, wherein a main air channel is arranged between the high-voltage coil 10 and the low-voltage coil 20, the high-voltage coil 10 is arranged outside the main air channel, the low-voltage coil 20 is arranged inside the main air channel, a curtain type oil channel and a second insulation paper board 2 are arranged in the main air channel, the second insulation paper board is arranged between the curtain type oil channel and the high-voltage coil 10, and the thickness of the second insulation paper board 2 is 1mm. Specifically, the curtain-type oil duct comprises a first insulating paper board 1 with the thickness of 1mm, the end faces on two sides of the first insulating paper board 1 are respectively provided with a high-pressure stay 3 attached to a second insulating paper board 2 and a low-pressure stay 4 attached to a low-pressure coil 20, the high-pressure stays 3 and the low-pressure stays 4 are arranged in a one-to-one correspondence mode, the high-pressure stays 3 and the low-pressure stays 4 are all distributed in a circular ring around the first insulating paper board 1, the end parts of two ends of the high-pressure stays 3 are 6-8 mm shorter than the end parts of two ends of the low-pressure stays 4, so that an oil duct gap 30 is formed between the second insulating paper board 2, the high-pressure stays 3 and the first insulating paper board 1, meanwhile, a first small oil gap 100 is formed among the second insulating paper board 2, the high-pressure stays 3 and the first insulating paper board 1 and the low-pressure coil 20, and a second small oil gap 200 is formed among the low-pressure stays 4.
It can be understood that the second insulating paper board 2, the high-voltage stay 3 and the first insulating paper board 1 form an oil passage notch 30, so that the creepage distance between high and low voltages is increased, the transverse flow of the coil end oil is facilitated, and the coil heat dissipation function is enhanced. The first small oil gap 100 and the second small oil gap 200 are matched to form a thin insulating cylinder small oil gap structure, so that the insulating strength of unit distance is improved, and the distance between a main channel and a low channel is reduced.
In addition, the high-voltage coil 10 is sequentially wound with a first layer of coil, a second layer of coil and an nth layer of coil from inside to outside, wherein N is a positive integer greater than 3, each layer of coil comprises a wire section 11 in the middle and insulation sections 12 arranged at two ends of the wire section 11, the insulation sections 12 of the first three layers of coils or the first four layers of coils are widened insulation sections 122, the insulation sections 12 of the other layers of high-voltage coils 10 are ordinary insulation sections 121, and the thickness of the widened insulation sections 122 is greater than that of the ordinary insulation sections 121. That is, the insulation sections 12 of the front three layers of coils or the front four layers of coils of the high-voltage coil are widened to increase the creepage distance between the high voltage and the low voltage.
In this embodiment, the width of the high-pressure stay 3 is preferably 3.5-4.5 mm, the width of the low-pressure stay 4 is preferably 3.5-4.5 mm, and the width of the main channel is 9-11 mm. Compared with the original 20 kV-level immersed transformer, the transformer has the advantages that the distance between the high-voltage main channel and the low-voltage main channel is at least 13mm, the outer diameter of the transformer coil is smaller, the whole structure is reduced, materials and copper wires are saved, and the loss is reduced.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (8)
1. The utility model provides a novel main insulation structure oil-immersed transformer of 20kV level, includes high-voltage coil (10) and sets up low-voltage coil (20) in high-voltage coil (10), sets up main air duct between high-voltage coil (10) and low-voltage coil (20), set up the curtain oil duct in the main air duct, its characterized in that, the curtain oil duct includes first insulation cardboard (1), first insulation cardboard (1) both sides terminal surface set up respectively with high-voltage stay (3) that high-voltage coil (10) is close to and with low-voltage stay (4) of laminating of low-voltage coil (20); the high-voltage stays (3) and the low-voltage stays (4) are arranged in a one-to-one correspondence mode, are all arranged in a circular ring mode around the first insulating paperboard (1), and the two end portions of the high-voltage stays (3) are 6-8 mm shorter than the two end portions of the low-voltage stays (4).
2. The 20kV novel main insulation structure oil immersed transformer according to claim 1, wherein the width of the high-voltage stay (3) is 3.5-4.5 mm.
3. The 20kV novel main insulation structure oil immersed transformer according to claim 1, wherein the width of the low-voltage stay (4) is 3.5-4.5 mm.
4. The oil immersed transformer with the 20 kV-level novel main insulation structure according to claim 1, wherein a second insulation paperboard (2) is arranged between the high-voltage stay (3) and the high-voltage coil (10), the second insulation paperboard (2), the high-voltage stay (3) and the first insulation paperboard (1) form an oil duct notch (30), a first small oil gap (100) is formed between the second insulation paperboard (2) and the first insulation paperboard (1), and a second small oil gap (200) is formed between the first insulation paperboard (1) and the low-voltage coil (20).
5. The 20 kV-level novel main insulation structure oil immersed transformer according to claim 4, wherein the high-voltage coil (10) is sequentially wound with a first layer of coil, a second layer of coil and an nth layer of coil from inside to outside, wherein N is a positive integer greater than 3, each layer of coil comprises a wire section (11) in the middle and insulation sections (12) arranged at two ends of the wire section (11), the insulation sections (12) of the first three layers of coils or the first four layers of coils are widened insulation sections (122), the insulation sections (12) of the other layers of high-voltage coils (10) are common insulation sections (121), and the thickness of the widened insulation sections (122) is greater than that of the common insulation sections (121).
6. The 20 kV-level novel main insulation structure oil immersed transformer according to claim 4, wherein the thickness of the second insulation paperboard (2) is 1mm.
7. A 20kV grade new main insulation structure oil-immersed transformer according to any of claims 1-6, characterized in that the first insulation board (1) has a thickness of 1mm.
8. The 20kV novel main insulation structure oil immersed transformer according to claim 7, wherein the width of the main air channel is 9-11 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321340449.3U CN219873107U (en) | 2023-05-30 | 2023-05-30 | Novel main insulation system oil-immersed transformer of 20kV level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321340449.3U CN219873107U (en) | 2023-05-30 | 2023-05-30 | Novel main insulation system oil-immersed transformer of 20kV level |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219873107U true CN219873107U (en) | 2023-10-20 |
Family
ID=88334645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321340449.3U Active CN219873107U (en) | 2023-05-30 | 2023-05-30 | Novel main insulation system oil-immersed transformer of 20kV level |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219873107U (en) |
-
2023
- 2023-05-30 CN CN202321340449.3U patent/CN219873107U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102760571B (en) | Winding method of high-frequency transformer | |
| CN219873107U (en) | Novel main insulation system oil-immersed transformer of 20kV level | |
| WO2021104424A1 (en) | Ltcc high-voltage transformer | |
| CN201397731Y (en) | Inner shield transposed conductor for transformer winding | |
| CN104752039A (en) | Insulation structure of 132 kV duplex-winding on-load tap changing transformer | |
| CN202258735U (en) | Insulating structure of transformer coil | |
| CN202134344U (en) | 35-KV amorphous oil-immersed transformer high-voltage coils | |
| CN103050245A (en) | Low-tension winding of large-capacity transformer | |
| CN203659596U (en) | 35kV transformer coil structure | |
| CN216749552U (en) | High-efficiency energy-saving high-power small-volume frameless transformer | |
| CN201918246U (en) | Main insulation structure of 220 KV three-phase power transformer with three coils | |
| CN209626009U (en) | Disc type winding | |
| CN201465754U (en) | Amorphous alloy transformer coil | |
| CN2814637Y (en) | Electric transformer | |
| CN211879199U (en) | Half-turn structure of transformer coil | |
| CN210535452U (en) | Voltage-withstanding transformer with single-side widening function | |
| CN208738015U (en) | A kind of 35kV oil-immersed power transformer high-low pressure winding Main Insulation Structure of Electric | |
| CN200956298Y (en) | Transformer rectangular coil | |
| JP2000331850A (en) | High-voltage generating coil | |
| KR100687563B1 (en) | Boosting transformer | |
| CN109841393A (en) | Winding alternating expression distribution transformer | |
| CN111430133A (en) | Half-turn structure of transformer coil and winding method thereof | |
| CN201812656U (en) | Main insulating structure of dry transformer | |
| CN201540810U (en) | Major insulation structure for hybrid insulation for oil-immersed transformer | |
| CN218182031U (en) | Oil-immersed power transformer stay curtain and transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |