CN211350363U - Electromagnetic voltage transformer with inverted structure - Google Patents
Electromagnetic voltage transformer with inverted structure Download PDFInfo
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- CN211350363U CN211350363U CN202020281228.3U CN202020281228U CN211350363U CN 211350363 U CN211350363 U CN 211350363U CN 202020281228 U CN202020281228 U CN 202020281228U CN 211350363 U CN211350363 U CN 211350363U
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Abstract
The utility model relates to an electromagnetic type voltage transformer of handstand structure. The technical scheme is as follows: the transformer body comprises an expander shell, an oil conservator shell, a porcelain bushing and a base which are sequentially connected from top to bottom, wherein a circular iron core, a winding structure wound on the circular iron core, a secondary lead tube and a capacitive screen are arranged in the transformer body; the winding structure comprises a secondary winding and a primary winding, the secondary winding is wound on the annular iron core, a shielding housing is arranged on the outer side of the secondary winding, the primary winding is wound on the outer side of the shielding housing alternately, and high-voltage cable paper is wrapped on the primary winding. The whole structure is compact, and the device has the advantages of small volume and light weight.
Description
Technical Field
The utility model relates to a mutual-inductor field specifically is an electromagnetic type voltage transformer of handstand structure.
Background
The voltage transformers used in the existing power system mainly comprise a pouring electromagnetic voltage transformer, a sulfur hexafluoride gas insulation electromagnetic voltage transformer, an oil immersion cascade electromagnetic voltage transformer and a capacitor voltage transformer. The pouring electromagnetic type voltage transformer is mainly suitable for electric power systems with voltage levels of 35kV and below, the sulfur hexafluoride gas insulation electromagnetic type voltage transformer is mainly applied to combined electrical appliance products, the oil immersion cascade electromagnetic type voltage transformer is suitable for electric power systems with voltage levels of 35kV to 220kV, and the capacitor type voltage transformer is suitable for electric power systems with voltage levels of 35kV to 1000 kV. The oil immersed cascade electromagnetic voltage transformer and the capacitor voltage transformer can be selectively used in open substations of electric power systems with voltage grades of 35kV and above.
At present, a capacitor voltage transformer and a voltage transformer used in an open-type transformer substation are complex in structure, so that faults occur in system operation, and the oil immersed cascade electromagnetic voltage transformer is limited in application due to large size, heavy weight, poor reliability and high cost.
Therefore, in order to solve the problem of poor applicability caused by complex structure or large volume of the existing transformer, the electromagnetic voltage transformer which has compact structure and small volume and has good applicability is urgently developed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses complicated or bulky technical problem that leads to the application poor to current transformer structure provides an electromagnetic type voltage transformer of handstand structure for thereby its compact structure, small make the application strong, application scope is wide.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be: the electromagnetic voltage transformer with the inverted structure comprises a transformer body with a closed structure, wherein the transformer body comprises an expander shell, an oil conservator shell, a porcelain bushing and a base which are sequentially connected from top to bottom, and a winding unit is arranged in the transformer body. The whole structure is compact, and the device has the advantages of small volume, light weight and strong applicability.
Furthermore, the winding unit comprises a circular iron core, a winding structure wound on the circular iron core, a secondary lead tube and a capacitive screen, wherein a terminal of the winding structure is led into a secondary junction box arranged at the lower part of the transformer body through the secondary lead tube, and the capacitive screen is wrapped outside the winding structure and the secondary lead tube; the winding structure comprises a secondary winding and a primary winding, the secondary winding is wound on the annular iron core, a shielding housing is arranged on the outer side of the secondary winding, the primary winding is wound on the outer side of the shielding housing alternately, and high-voltage cable paper is wrapped on the primary winding. The annular iron core, the primary winding, the secondary winding, the shielding housing and the high-voltage cable paper which form the body main body of the device are placed in the shell of the oil conservator and positioned on the high-voltage side of a product to form an inverted structure of the product, and the device has the advantages of compact overall structure, small volume, light weight and strong applicability; the cross section of the annular iron core is approximately circular, so that the space can be fully utilized, and the sectional area of the iron core is maximized. The annular iron core wound with the secondary winding is placed into a shielding housing, the primary winding is wound and high-voltage cable paper is wrapped outside the shielding housing alternately, and the insulation level between primary winding layers is effectively improved by the strip-shaped high-voltage cable paper.
Further, the ground terminal of the primary winding and the terminal of the secondary winding are led into the secondary junction box through a secondary lead tube.
Furthermore, the secondary junction box is fixed on the base and is of a cylindrical structure. Adapting to the overall structure.
Further, a grounding plate is arranged inside the secondary junction box. The space of the body is fully utilized, so that the structure is compact.
Furthermore, insulating oil is also arranged in the device body and is released through an oil drain valve arranged on the base.
Furthermore, an oil level observation window and an oil filling plug are arranged on the expander shell. For observing oil level and filling oil.
Furthermore, a lifting bar for lifting is fixed on the outer shell of the oil conservator.
Furthermore, the annular iron core is formed by continuously winding high-permeability silicon steel sheets. The circular iron core is provided with the cross section which is approximately circular, so that the space can be fully utilized, and the sectional area of the iron core is maximized.
Further, a primary wiring board is arranged in the transformer body.
Furthermore, the primary winding and the high-voltage cable paper are in a circular ring shape after being wound.
The utility model discloses an adopt above-mentioned technical scheme, have following advantage:
1. the annular iron core, the primary winding, the secondary winding, the shielding housing and the high-voltage cable paper which form the body main body of the device are placed in the shell of the oil conservator and positioned on the high-voltage side of a product to form an inverted structure of the product, and the device has the advantages of compact overall structure, small volume, light weight and strong applicability; the cross section of the annular iron core is approximately circular, so that the space can be fully utilized, and the sectional area of the iron core is maximized. The annular iron core wound with the secondary winding is placed into a shielding housing, the primary winding is wound and high-voltage cable paper is wrapped outside the shielding housing alternately, and the insulation level between primary winding layers is effectively improved by the strip-shaped high-voltage cable paper.
2. The circular iron core is provided with the cross section which is approximately circular, so that the space can be fully utilized, and the sectional area of the iron core is maximized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a front view of fig. 1.
Fig. 3 is a schematic diagram of the internal structure of the body of fig. 1.
In the figure, 1, an expander shell, 2, an oil level observation window, 3, an oil conservator shell, 4, a winding structure, 5, a porcelain bushing, 6, a base, 7, an oil drain valve, 8, a lifting tab, 9, a primary wiring board, 10, a secondary wiring box, 11, a grounding plate, 12, insulating oil, 13, a circular iron core, 14, a primary winding, 15, a secondary winding, 16, a shielding case, 17, high-voltage cable paper, 18, a secondary lead pipe, 19 and a capacitor screen.
Detailed Description
In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
As shown in fig. 1-2, an electromagnetic voltage transformer with an inverted structure comprises an expander housing 1, an oil conservator housing 3, a porcelain bushing 5 and a base 6 which are sequentially connected from top to bottom, and the porcelain bushing 5 comprises a sleeve and an umbrella-shaped structure which extends outwards from the outer surface of the sleeve, wherein the umbrella-shaped structure is in a laminated state that large umbrellas and small umbrellas are alternately arranged, so that the distribution of an external electric field is uniform; the upper part of the porcelain bushing 5 is connected with an oil conservator shell 3, the oil conservator shell 3 is divided into an upper part and a lower part, the lower part is a shell structure sleeved on the upper part of the porcelain bushing 5, the upper part and the lower part are connected to form a shell structure for accommodating the winding structure 4, a primary wiring board 9 is installed on the upper shell, and a lifting bar 8 for lifting the whole machine is further arranged on the outer side of the upper part of the oil conservator shell 3; an expander shell 1 is connected above the oil conservator shell 3, and an oil filling plug used for injecting oil bodies and an oil level observation window 2 used for observing the oil levels are arranged on the expander shell 1; the lower part of the porcelain bushing 5 is connected with a base 6, a cylindrical secondary junction box 10 and an oil drain valve 7 are fixed on the base 6, and an earth plate 11 is installed in the secondary junction box 10; in addition, the cavity of the totally-enclosed structure body consisting of the expander shell 1, the oil conservator shell 3, the porcelain bushing 5, the secondary junction box 10, the base 6 and the oil drain valve 7 is filled with insulating oil 12, and the insulating oil 12 can be released through the oil drain valve 7.
As shown in fig. 3, a circular iron core 13, a winding structure 4 wound on the circular iron core 13, a secondary lead tube 18 and a capacitive screen 19 are arranged in the body; the annular iron core 13 is formed by continuously winding high-permeability silicon steel sheets, the cross section of the annular iron core 13 is approximately circular, the space can be fully utilized, and the sectional area of the iron core is maximum; the terminal of the winding structure 4 is led into a secondary junction box 10 arranged at the lower part of the body through a secondary lead tube 18, and a capacitive screen 19 is wrapped outside the winding structure 4 and the secondary lead tube 18; the winding structure 4 comprises a secondary winding 15 and a primary winding 14, wherein the secondary winding 15 is wound on a circular iron core 13, a shielding case 16 is arranged on the outer side of the secondary winding 15, namely the wound secondary winding 15 and the circular iron core 13 are placed in the shielding case 16, the primary winding 14 is wound on the outer side of the shielding case 16 alternately, a strip-shaped high-voltage cable paper 17 is wrapped on the primary winding 14, the insulation level between 14 layers of the primary winding is effectively improved by the strip-shaped high-voltage cable paper 17, and the primary winding 14 and the high-voltage cable paper 17 are wound on the shielding case 16 into a circular shape; the ground terminal of the primary winding 14 and the terminal of the secondary winding 15 are led into the secondary junction box 10 through the secondary lead tube 18; the secondary lead tube 18 is wrapped by a plurality of layers of capacitive screens 19, the number of the layers of the capacitive screens 19 is adjusted according to the voltage grade of the invention, and the capacitive screens 19 are distributed in an ascending way in the axial direction of the secondary lead tube 18 to form a conical structure.
Although the present invention has been described in detail by referring to the drawings in conjunction with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and substance of the present invention, and these modifications or substitutions are intended to be within the scope of the present invention/any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The electromagnetic voltage transformer with the inverted structure is characterized by comprising a transformer body with a closed structure, wherein the transformer body comprises an expander shell (1), an oil conservator shell (3), a porcelain bushing (5) and a base (6) which are sequentially connected from top to bottom, and a winding unit is arranged in the transformer body.
2. The electromagnetic voltage transformer with an inverted structure as claimed in claim 1, wherein the winding unit comprises a circular ring-shaped iron core (13), a winding structure (4) wound on the circular ring-shaped iron core (13), a secondary lead tube (18) and a capacitive screen (19), wherein the terminal of the winding structure (4) is led into a secondary junction box (10) arranged at the lower part of the transformer body through the secondary lead tube (18), and the capacitive screen (19) is wrapped outside the winding structure (4) and the secondary lead tube (18); the winding structure (4) comprises a secondary winding (15) and a primary winding (14), the secondary winding (15) is wound on the annular iron core (13), a shielding housing (16) is arranged on the outer side of the secondary winding (15), the primary winding (14) is wound on the outer side of the shielding housing (16) alternately, and high-voltage cable paper (17) is wrapped on the primary winding (14).
3. The electromagnetic voltage transformer of inverted structure according to claim 2, characterized in that the ground terminal of the primary winding (14) and the terminal of the secondary winding (15) are led into the secondary junction box (10) through a secondary lead tube (18).
4. The electromagnetic voltage transformer of inverted structure according to claim 3, characterized in that said secondary junction box (10) is fixed on the base (6) and has a cylindrical structure.
5. The electromagnetic voltage transformer of inverted structure according to claim 4, characterized in that a ground plate (11) is provided inside the secondary junction box (10).
6. The electromagnetic voltage transformer of inverted structure according to claim 1, characterized in that the body is further provided with insulating oil (12), and the insulating oil (12) is released through an oil drain valve (7) provided on the base (6).
7. The electromagnetic voltage transformer of inverted structure according to claim 1, characterized in that said expander housing (1) is provided with an oil level observation window (2) and an oil filler plug.
8. The electromagnetic voltage transformer of inverted structure according to claim 1, wherein a lifting bar (8) for lifting is fixed to the conservator housing (3).
9. The electromagnetic voltage transformer with the inverted structure as claimed in claim 2, wherein the toroidal core (13) is continuously wound by high-permeability silicon steel sheets.
10. The electromagnetic voltage transformer of inverted structure according to claim 1, characterized in that a primary wiring board (9) is further provided in the body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020281228.3U CN211350363U (en) | 2020-03-09 | 2020-03-09 | Electromagnetic voltage transformer with inverted structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020281228.3U CN211350363U (en) | 2020-03-09 | 2020-03-09 | Electromagnetic voltage transformer with inverted structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211350363U true CN211350363U (en) | 2020-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020281228.3U Active CN211350363U (en) | 2020-03-09 | 2020-03-09 | Electromagnetic voltage transformer with inverted structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211350363U (en) |
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2020
- 2020-03-09 CN CN202020281228.3U patent/CN211350363U/en active Active
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