CN209912697U - Novel dry-type transformer - Google Patents
Novel dry-type transformer Download PDFInfo
- Publication number
- CN209912697U CN209912697U CN201920363835.1U CN201920363835U CN209912697U CN 209912697 U CN209912697 U CN 209912697U CN 201920363835 U CN201920363835 U CN 201920363835U CN 209912697 U CN209912697 U CN 209912697U
- Authority
- CN
- China
- Prior art keywords
- voltage
- low
- voltage coil
- coil
- sleeve
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Coils Of Transformers For General Uses (AREA)
Abstract
The utility model discloses a novel dry-type transformer, high-voltage coil adopts the wire winding mode coiling of vertical direction to become pagoda structure by the copper line, high-voltage coil, become a whole through pouring into between high-voltage bushing and the low-voltage bushing, and form the high-voltage solenoid, at the surface spraying semiconductor conductive paint of high-voltage solenoid, and make the high-voltage solenoid surface form zero potential, the distance between two terminal correspondences of semiconductor conductive paint on the high-voltage solenoid and high-voltage bushing root and low-voltage bushing root is 5-20mm, the center conductor in the high-voltage bushing is connected with the high-voltage lead wire of high-voltage coil, shielding electrode in the high-voltage bushing links to each other with the semiconductor conductive paint of high-voltage solenoid surface, the low-voltage lead wire of high-voltage coil links to each; the low-voltage coil is sleeved on the iron core. The utility model discloses the transformer is small, light in weight, and no-load loss is little, and voltage level, capacity can all be done higher moreover.
Description
The technical field is as follows:
the utility model relates to a novel dry-type transformer.
Background art:
in the field of transformer manufacturing, the transformer is generally divided into oil-immersed transformers and dry-type transformers, and epoxy cast dry-type transformers are mostly adopted in 40.5kV and below voltage levels. Compared with air and transformer oil, the epoxy resin has higher insulating strength, higher mechanical strength and excellent moisture-proof and dust-proof performance after casting molding, and has the advantages of energy conservation, oil-free property, convenient maintenance and the like compared with an oil-immersed transformer, so that the epoxy resin dry-type transformer is more and more popular with users.
The coil structure of the prior epoxy resin dry-type transformer (shown in figure 1) mainly comprises a low-voltage coil and a high-voltage coil, wherein the high-voltage coil adopts a transverse winding mode, a high-voltage lead is led out from the middle position of the outer surface of the coil, so that the outer surface of the high-voltage coil is at a high potential, the outer surface and the upper and lower end surfaces of the high-voltage coil are easy to generate a flashover discharge phenomenon, and meanwhile, certain insulation distances H1 and H2 are reserved between the high-voltage coils and between the high-voltage coil and an iron core, so that the size of the iron core is increased, and the volume of. Due to the limitation of use occasions and technical conditions, the epoxy cast dry-type transformer with the structure can only achieve the voltage level of 40.5kV at present, and the transformer with the higher voltage level is mainly oil-immersed. Therefore, there is a need to improve the prior art to overcome the deficiencies of the prior art.
The invention content is as follows:
the utility model relates to a solve the problem that above-mentioned prior art exists and provide a novel dry-type transformer.
The utility model discloses the technical scheme who adopts has: a novel dry-type transformer comprises an iron core, a high-voltage sleeve, a low-voltage coil, a high-voltage coil and a low-voltage sleeve, wherein the high-voltage coil is wound into a tower-type structure by a copper wire in a vertical winding mode, the high-voltage coil, the high-voltage sleeve and the low-voltage sleeve are cast into a whole to form a high-voltage coil, semiconductor conductive paint is sprayed on the outer surface of the high-voltage coil, the outer surface of the high-voltage coil is enabled to form zero potential, the distance between two tail ends of the semiconductor conductive paint on the high-voltage coil, the root of the high-voltage sleeve and the root of the low-voltage sleeve is 5-20mm, a central conductor in the high-voltage sleeve is connected with a high-voltage lead of the high-voltage coil, a shielding electrode in the high-voltage sleeve is connected with; the low-voltage coil is sleeved on the iron core.
Furthermore, the high-voltage coil is wound in a vertical winding mode to form a pagoda structure, copper wires in the high-voltage coil are wound from bottom to top, the bottom of the high-voltage coil with the pagoda structure is formed first, and then the top of the high-voltage coil is formed.
The utility model discloses electrically conductive lacquer of high-voltage wire package surface spraying semiconductor after the pouring solidification makes high-voltage wire package surface be zero potential, and high-voltage coil's high-voltage lead wire is drawn forth through up end integral type high-voltage bushing, and integral type high-voltage bushing's central conductor links to each other with high-voltage coil's high-voltage lead wire, and shielding electrode links to each other with the electrically conductive lacquer of semiconductor of high-voltage wire package surface, and the low-voltage lead wire is drawn forth through the integral type low pressure sleeve pipe of terminal. The beneficial effects produced by the method are as follows: the outer surfaces of the high-voltage wire packages are all at zero potential, so that insulation distances are not required to be reserved between the high-voltage wire packages and the iron core, the high-voltage wire packages and the iron core can be tightly attached together, and the low-voltage outgoing wires of the low-voltage wire packages and the low-voltage outgoing wires of the high-voltage wire packages can be upwards led out along the outer surfaces of the high-voltage wire packages, so that the size of the iron core is greatly reduced, the integral size of the transformer. High-low voltage lead wire is drawn forth through the integral type high-low voltage bushing of upper and lower terminal surface, and high-voltage coil adopts vertical pagoda formula structure coiling, but the insulation thickness of rational utilization casting material, and high potential department is insulating thick, and low potential department is insulating thin, and effectual improvement electric insulation performance reduces the partial discharge volume.
Description of the drawings:
fig. 1 is a structural view of a dry type transformer in the related art.
Fig. 2 is a structural diagram of the present invention.
Fig. 3 is a partial enlarged view of the present invention.
Fig. 4 is a structural diagram of the semiconductor conductive paint sprayed on the medium-high voltage wire package of the utility model.
1. An iron core; 2. a high voltage bushing; 3. a low voltage coil; 4. a high voltage coil; 5. a low pressure bushing.
The specific implementation mode is as follows:
the present invention will be further described with reference to the accompanying drawings.
As shown in fig. 2 to 4, the utility model relates to a novel dry-type transformer, including iron core 1, high-voltage bushing 2, low-voltage coil 3, high-voltage coil 4, low-voltage bushing 5 and external lead 7.
The copper wire is wound on an insulating framework by adopting a vertical tower type structure, after the winding is finished, the insulating framework is removed to form a high-voltage coil 4, two ends of the copper wire correspond to a high-voltage lead and a low-voltage lead of the high-voltage coil 4, and the high-voltage coil 4, the high-voltage sleeve 2 and the low-voltage sleeve 5 are poured and solidified into a whole through insulating materials to form a high-voltage coil. And spraying the semiconductor conductive paint on the outer surface of the high-voltage wire package, enabling the outer surface of the high-voltage wire package to form zero potential, enabling the distance between the upper tail end of the semiconductor conductive paint on the high-voltage wire package and the root of the high-voltage sleeve 2 to be 5-20mm, and enabling the distance between the lower tail end of the semiconductor conductive paint on the high-voltage wire package and the root of the low-voltage sleeve 5 to be 5-20 mm.
The utility model provides a high-voltage coil 4 adopts vertical wire winding mode winding to form pagoda type structure. The copper wire in the high-voltage coil 4 is wound from bottom to top, i.e. the bottom of the high-voltage coil 4 is formed first, and then the copper wire is continuously wound upwards to form the top of the high-voltage coil 4.
The central conductor in the high-voltage sleeve 2 is connected with the high-voltage lead of the high-voltage coil 4, the shielding electrode in the high-voltage sleeve 2 is connected with the semiconductor conductive paint on the outer surface of the high-voltage coil, the low-voltage lead of the high-voltage coil 4 is connected with the central conductor in the low-voltage sleeve 5, and the external lead 7 is connected with the low-voltage sleeve 5.
The copper wire is wound on the insulating framework, the insulating framework is removed after the winding is finished to form the low-voltage coil 3, and after the low-voltage coil 3 is cast and solidified, the semiconductor conductive paint is sprayed on the outer surface of the low-voltage coil, so that the zero potential is formed on the outer surface of the low-voltage coil. Or the low-voltage coil 3 with the insulating framework can be formed without removing the insulating framework or pouring. The low-voltage lead wire 6 and the external lead wire 7 of the low-voltage coil 3 are both led out upwards along the outer surface of the high-voltage coil pack 4. The low-voltage coil 3 is sleeved on the iron core 1, and the high-voltage wire package 4 is sleeved on the low-voltage wire package 3.
The utility model discloses high voltage solenoid surface is zero potential among the dry-type transformer, need not leave the insulation distance between the high voltage solenoid (between A looks in fig. 2 and B looks and between B looks and the C looks) and between high voltage solenoid and the iron core, between the high voltage solenoid and iron core can closely paste together, like this great reduction the iron core size, reduce the whole size of transformer, practice thrift manufacturing cost. High-low voltage lead wires are led out through the integral casting sleeve with the upper end face and the lower end face, and the high-voltage coil is wound by adopting a vertical tower type structure, so that the insulating casting material and the space utilization rate are higher, the voltage distribution is more uniform, the electrical insulation performance can be effectively improved, and the local discharge capacity is reduced.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications can be made without departing from the principle of the present invention, and these modifications should also be regarded as the protection scope of the present invention.
Claims (2)
1. A novel dry-type transformer is characterized in that: the high-voltage coil comprises an iron core (1), a high-voltage sleeve (2), a low-voltage coil (3), a high-voltage coil (4) and a low-voltage sleeve (5), wherein a copper wire is wound into a pagoda structure in a winding mode in the vertical direction, the high-voltage coil (4), the high-voltage sleeve (2) and the low-voltage sleeve (5) are integrated through casting, a high-voltage coil is formed, semiconductor conductive paint is sprayed on the outer surface of the high-voltage coil, the outer surface of the high-voltage coil is enabled to be zero potential, the distance between two tail ends of the semiconductor conductive paint on the high-voltage coil, the root of the high-voltage sleeve (2) and the root of the low-voltage sleeve (5) is 5-20mm, a central conductor in the high-voltage sleeve (2) is connected with a high-voltage lead of the high-voltage coil (4), a shielding electrode in the, a low-voltage lead of the high-voltage coil (4) is connected with a central conductor in the low-voltage sleeve (5); the low-voltage coil (3) is sleeved on the iron core (1).
2. A novel dry-type transformer as claimed in claim 1 wherein: the high-voltage coil (4) is wound in a vertical winding mode to form a pagoda structure, copper wires in the high-voltage coil (4) are wound from bottom to top, the bottom of the high-voltage coil (4) with the pagoda structure is formed first, and then the top of the high-voltage coil (4) is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920363835.1U CN209912697U (en) | 2019-03-21 | 2019-03-21 | Novel dry-type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920363835.1U CN209912697U (en) | 2019-03-21 | 2019-03-21 | Novel dry-type transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209912697U true CN209912697U (en) | 2020-01-07 |
Family
ID=69033077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920363835.1U Expired - Fee Related CN209912697U (en) | 2019-03-21 | 2019-03-21 | Novel dry-type transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209912697U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110021472A (en) * | 2019-03-21 | 2019-07-16 | 南京智达电气设备有限公司 | A kind of new dry-type transformer |
-
2019
- 2019-03-21 CN CN201920363835.1U patent/CN209912697U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110021472A (en) * | 2019-03-21 | 2019-07-16 | 南京智达电气设备有限公司 | A kind of new dry-type transformer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209912697U (en) | Novel dry-type transformer | |
| CN210378715U (en) | High-voltage wire outlet structure of dry type transformer | |
| CN202940106U (en) | Dry-type transformer with open coiled iron cores | |
| CN204857392U (en) | Novel anti ware of high -power high frequency electric of five posts of three -phase | |
| CN208093344U (en) | A kind of dc circuit breaker energy supply transformer | |
| CN215578140U (en) | Ungrounded epoxy resin poured 35kV voltage transformer | |
| CN216597255U (en) | Transformer coil and three-phase three-column dry-type transformer | |
| CN201311829Y (en) | Low pressure side copper bar wire outlet device of transformer | |
| CN201708012U (en) | Resin-cast rectangular dry-type transformer | |
| CN205723097U (en) | A kind of Novel chip inductor | |
| CN204011014U (en) | Fill chlamydate toroidal transformer | |
| CN110021472A (en) | A kind of new dry-type transformer | |
| CN202633015U (en) | Epoxy resin poured composite voltage transformer | |
| CN2357403Y (en) | Dry-transformer winding conductor | |
| CN202285190U (en) | Small-sized energy-saving dry-type transformer | |
| CN203812698U (en) | Resin insulation excitation-free voltage-regulation distribution transformer | |
| CN207425566U (en) | A kind of folding stereo open core no-encapsulated-winding dry-type transformer | |
| CN206893403U (en) | A kind of three dimensional wound core opens wide dry transformer coil structure | |
| CN101471171A (en) | Amorphous alloy oil immersion type distribution transformer body structure and manufacturing method thereof | |
| CN205354836U (en) | Novel resin pouring dry -type grounding transformer | |
| CN201562535U (en) | Control transformer | |
| CN206601961U (en) | A kind of paper bag semihard copper strap wire | |
| CN205959736U (en) | Novel compensation reactor | |
| CN204681258U (en) | Pillar high-voltage DC power supply | |
| CN206961665U (en) | A kind of current transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200107 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |