CN216250360U - Stay structure and power transformer - Google Patents
Stay structure and power transformer Download PDFInfo
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- CN216250360U CN216250360U CN202122809008.0U CN202122809008U CN216250360U CN 216250360 U CN216250360 U CN 216250360U CN 202122809008 U CN202122809008 U CN 202122809008U CN 216250360 U CN216250360 U CN 216250360U
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- stay
- electrostatic plate
- ring
- stay structure
- insulating ring
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Abstract
The utility model provides a stay structure and a power transformer, and relates to the technical field of transformer corollary equipment, wherein the stay structure comprises a first stay structure, an electrostatic plate and an insulating ring; the insulating ring and the electrostatic plate are both of annular structures, and the insulating ring is connected with one end of the electrostatic plate; the first supporting strip structure is arranged on the inner side and the outer side of the insulating ring and is abutted against the insulating ring; gaps are arranged between the first supporting strip structure and the inner side and the outer side of the electrostatic plate. The utility model solves the technical problem that the electric field distortion and the partial discharge are caused by the wedge-shaped sharp angle formed between the stay and the electrostatic plate in the prior art.
Description
Technical Field
The utility model relates to the technical field of transformer corollary equipment, in particular to a supporting strip structure and a power transformer.
Background
Insulation reliability is one of the key properties that high voltage power transformers must guarantee. Especially in the ultrahigh voltage transformer, the main technical measure for ensuring the insulation reliability is to fully design the insulation strength in the transformer to ensure that the product runs with zero partial discharge.
At present, an oil-impregnated power transformer adopts oil paper insulation and adopts a structure of a thin paper tube and a small oil gap to improve the insulation tolerance strength of the oil gap. An oil gap is formed in the insulating structure by adopting an insulating supporting strip; at the same time, the stay also serves as an important component for the transmission of the radial supporting force.
In the conventional insulating structure, the stay has a rectangular shape. The stay can be used in products with small capacity and low voltage level. According to the electromagnetic field theory, in an insulating structure composed of different materials, an alternating current electric field is related to factors such as the dielectric constant of the materials and the shape of electrodes. The stay of the traditional structure is used in a high-capacity and ultrahigh-voltage product, and can generate negative effect on the local position of the insulating structure to cause local discharge.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a stay structure and a power transformer, which are used for relieving the technical problems of electric field distortion and partial discharge caused by the wedge-shaped sharp angle formed between a stay and an electrostatic plate in the prior art.
In order to achieve the purpose, the utility model adopts the following technical scheme:
in a first aspect, the present invention provides a strut structure, including a first strut structure, an electrostatic plate, and an insulating ring;
the insulating ring and the electrostatic plate are both of annular structures, and the insulating ring is connected with one end of the electrostatic plate;
the first stay structure is arranged on the inner side and the outer side of the insulating ring and is abutted against the insulating ring;
gaps are arranged between the first supporting strip structure and the inner side and the outer side of the electrostatic plate.
In an alternative embodiment of the present invention, a surface of the first supporting bar structure facing the electrostatic plate has a first groove, and the first groove forms the gap.
Further, the first stay structure includes a plurality of first stays and a plurality of second stays;
the first supporting strips are distributed at intervals along the circumferential direction of the electrostatic plate, the length direction of the first supporting strips is parallel to the axial direction of the electrostatic plate, each first supporting strip is abutted against the outer wall of the insulating ring, and the surface, facing the electrostatic plate, of each first supporting strip is provided with a first groove;
the second supporting strips are distributed at intervals along the circumferential direction of the electrostatic plate, the length direction of the second supporting strips is parallel to the axial direction of the electrostatic plate, each second supporting strip is abutted against the inner wall of the insulating ring, and the surface, facing the electrostatic plate, of each second supporting strip is provided with the first groove.
Furthermore, the stay structure also comprises a paper ring, the paper ring is of an annular structure, and the paper ring is connected with one end, far away from the insulating ring, of the electrostatic plate;
the end parts of the first supporting strips and the second supporting strips are abutted to the paper ring.
The second stay structure is provided with a plurality of layers, and the plurality of layers of the second stay structure are arranged layer by layer along the direction of the first stay away from the electrostatic plate.
Furthermore, the second stay structure comprises an angle ring and a plurality of third stays, and the third stays are arranged on the outer sides of the first stays in a one-to-one correspondence manner;
the cross section of the angle ring is of an L-shaped structure, one end of the angle ring is arranged at one end, far away from the electrostatic plate, of the paper ring, and the other end of the angle ring is coated on the outer side of each third stay.
Furthermore, a second groove is formed in one end of the outer surface of the third stay; the angle ring extends into the second groove to coat the outer surface of the third stay, and the end of the angle ring extending into the second groove is abutted against the third stay to limit the axial position of the third stay.
In an optional embodiment of the present invention, the stay structure further includes a paper plate, the paper plate is disposed in a ring shape, and the paper plate is sandwiched between the first stay and the third stay, and between two adjacent third stays.
Further, the first stay and the third stay are in an arc shape toward the surface of the paperboard for fitting with the paperboard.
In a second aspect, an embodiment of the present invention provides an electrical transformer, including the stay structure according to any one of the foregoing embodiments.
The embodiment of the utility model can realize the following beneficial effects:
in a first aspect, an embodiment of the present invention provides a supporting strip structure, including a first supporting strip structure, an electrostatic plate, and an insulating ring; the insulating ring and the electrostatic plate are both of annular structures, and the insulating ring is connected with one end of the electrostatic plate; the first stay structure is arranged on the inner side and the outer side of the insulating ring and is abutted against the insulating ring; gaps are arranged between the first supporting strip structure and the inner side and the outer side of the electrostatic plate.
According to the utility model, the first supporting bar structures are distributed along the circumferential direction of the inner ring and the circumferential direction of the outer ring of the insulating ring and the electrostatic plate, and gaps exist between the first supporting bar structures on the two sides and the electrostatic plate, so that a wedge-shaped oil gap formed by the first supporting bar structures and the side wall of the electrostatic plate in a contact manner is avoided, the discharge phenomenon at the wedge-shaped oil gap is prevented, and the insulating strength is effectively improved.
Compared with the stay structure in the prior art, a gap exists between the first stay structure and the electrostatic plate, a wedge-shaped oil gap can be effectively avoided from being formed between the first stay structure and the electrostatic plate, the phenomenon of discharging at the wedge-shaped oil gap is avoided, and the insulating strength is improved.
In conclusion, the embodiment of the utility model at least relieves the technical problems of electric field distortion and partial discharge caused by the wedge-shaped sharp angle formed between the stay and the electrostatic plate in the prior art.
In addition, a second aspect of an embodiment of the present invention further provides a power transformer, including the stay structure provided in the first aspect; the power transformer provided by the embodiment of the utility model comprises the stay structure provided by the first aspect, so that the power transformer provided by the embodiment of the utility model can achieve all the beneficial effects which can be achieved by the stay structure provided by the first aspect.
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 that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic cross-sectional structure view of a stay structure according to an embodiment of the present invention;
fig. 2 is a schematic view of a usage state of a stay structure according to an embodiment of the present invention.
Icon: 1-a first stay structure; 11-a first stay; 12-a second stay; 2-an electrostatic plate; 3-clearance; 4-an insulating ring; 5-paper ring; 6-a second stay structure; 61-a third stay; 62-angle ring; 7-line cake; 8-paperboard.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the utility model are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Example one
The present embodiment provides a stay structure, referring to fig. 1, the left part of the drawing is the inside of the stay structure, and the right part of the drawing is the outside of the stay structure;
the stay structure comprises a first stay structure 1, an electrostatic plate 2 and an insulating ring 4; the insulating ring 4 and the electrostatic plate 2 are both of annular structures, and the insulating ring 4 is connected with one end of the electrostatic plate 2; the first supporting bar structures 1 are arranged on the inner side and the outer side of the insulating ring 4, and the first supporting bar structures 1 are abutted with the insulating ring 4; gaps 3 are arranged between the first supporting structure 1 and the inner side and the outer side of the electrostatic plate 2.
The embodiment of the utility model at least relieves the technical problems of electric field distortion and partial discharge caused by the wedge-shaped sharp angle formed between the stay and the electrostatic plate in the prior art.
In the embodiment of the utility model, the first supporting bar structures 1 are uniformly distributed along the circumferential direction of the inner ring and the circumferential direction of the outer ring of the insulating ring and the electrostatic plate 2, and gaps exist between the first supporting bar structures 1 on the two sides and the electrostatic plate 2, so that a wedge-shaped oil gap formed by the contact of the first supporting bar structures 1 and the side wall of the electrostatic plate 2 is avoided, the discharge phenomenon at the wedge-shaped oil gap is prevented, and the insulating strength is effectively improved.
Compared with the stay structure in the prior art, a gap exists between the first stay structure 1 and the electrostatic plate 2, a wedge-shaped oil gap can be effectively avoided between the first stay structure 1 and the electrostatic plate 2, the phenomenon of discharging at the wedge-shaped oil gap is avoided, and the insulation strength is improved.
In an alternative embodiment of this embodiment, the surface of the first stay structure 1 facing the electrostatic plate 2 has a first groove, which forms said gap 3. The first groove is arranged on the first supporting strip structure 1 at the same height position with the electrostatic plate 2, and the first supporting strip structure 1 forms a gap 3 with the electrostatic plate 2 through the first groove, so that a wedge-shaped oil gap formed by the electrostatic plate 2 and the first supporting strip structure 1 in direct contact is avoided.
Further, the first stay structure 1 includes a plurality of first stays 11 and a plurality of second stays 12; a plurality of first supporting strips 11 are distributed at intervals along the circumferential direction of the electrostatic plate 2, the length direction of the first supporting strips 11 is parallel to the axial direction of the electrostatic plate 2, each first supporting strip 11 is abutted against the outer wall of the insulating ring 4, and the surface of each first supporting strip 11 facing the electrostatic plate 2 is provided with the first groove; the second stays 12 are distributed at intervals along the circumferential direction of the electrostatic plate 2, the length direction of the second stays 12 is parallel to the axial direction of the electrostatic plate 2, each second stay 12 abuts against the inner wall of the insulating ring 4, and the surface of each second stay 12 facing the electrostatic plate 2 is provided with a first groove. The first supporting strips 11 are uniformly distributed along the outer circumference of the electrostatic plate 2, the second supporting strips 12 are uniformly distributed along the inner circumference of the electrostatic plate 2, and a gap 3 is formed between each of the first supporting strips 11 and the electrostatic plate 2 and between each of the second supporting strips 12 and the electrostatic plate 2. One end of the plurality of first stays 11 and the plurality of second stays 12 remote from the electrostatic plate 2 is disposed around the cake 7, i.e., the insulating ring 4 abuts against the surrounding cake 7.
Furthermore, the stay structure further comprises a paper ring 5, the paper ring 5 is of an annular structure, and the paper ring 5 is connected with one end, far away from the insulating ring 4, of the electrostatic plate 2; the ends of each first stay 11 and each second stay 12 abut against the paper ring 5. The first stay 11 and the second stay 12 are abutted on the paper ring 5, and the paper ring 5 is used for providing support for the first stay 11, the second stay 12 and the electrostatic plate 2.
Further, the stay structure further includes a second stay structure 6 located outside the first stay 11, the second stay structure 6 has multiple layers, and the multiple layers of the second stay structure 6 are arranged layer by layer along the direction of the first stay 11 away from the electrostatic plate 2. The second supporting structures 6 are aligned with the first supporting structures 11 one by one, and are arranged one by one along a direction away from the electrostatic plate 2, that is, the second supporting structures 6 are arranged in a manner of emitting from the first supporting structures 11 along the direction away from the electrostatic plate 2.
Further, the second supporting structure 6 includes an angle ring 62 and a plurality of third supporting bars 61, and the plurality of third supporting bars 61 are disposed on the outer sides of the plurality of first supporting bars 11 in a one-to-one correspondence manner; the cross section of the angle ring 62 is an L-shaped structure, one end of the angle ring 62 is disposed at one end of the paper ring 5 away from the electrostatic plate 2, and the other end of the angle ring 62 covers the outer side of each third stay 61. The angle ring 62 is of an annular structure, two ends of the angle ring 62 are bent by 90 degrees, one end of the angle ring 62 is connected with the paper ring 5, and the other end of the angle ring is wrapped outside each third stay 61.
Further, a second groove is formed at one end of the outer surface of the third stay 61; the end of the angle ring 62 extending into the second groove abuts against the third stay 61 to define the axial position of the third stay 61. The angle ring 62 extends into and abuts against the second groove of the third stay 61, and the third stay 61 is supported by the angle ring 62, so that the third stay 61 is prevented from moving towards the angle ring 62 and the angle ring 62 is prevented from being punctured.
In an optional embodiment of this embodiment, the stay structure further includes a paper board 8, the paper board 8 is disposed in a ring shape, and the paper board 8 is sandwiched between the first stay 11 and the third stay 61, and between two adjacent third stays 61. Between the first stay 11 and the third stay 61, and between the peripheral adjacent third stays 61, the paper sheet 8 is disposed, and the paper sheet 8 is in a circular structure surrounding the electrostatic plate 2.
Further, referring to fig. 2, the first stay 11 and the third stay 61 are curved toward the surface of the sheet 8 for fitting with the sheet 8. The contact surfaces of the first stay 11 and the third stay 61 with the paper board 8 are designed into arc surfaces, so that gaps between the first stay 11 and the third stay 61 with the paper board 8 are effectively eliminated, the transmission of radial force is better ensured, and the use reliability is improved.
Example two
The present embodiment provides a power transformer including the brace structure provided in any one of the alternative embodiments of the present invention.
Since the power transformer provided by this embodiment includes the brace structure described in the first embodiment, the power transformer provided by this embodiment can achieve all the advantages that can be achieved by the brace structure in the first embodiment, and the specific structure and the achieved effects thereof can be obtained with reference to each optional or preferred embodiment in the first embodiment.
Finally, it should be noted that: the embodiments in the present description are all described in a progressive manner, each embodiment focuses on the differences from the other embodiments, and the same and similar parts among the embodiments can be referred to each other; the above embodiments in the present specification are only used for illustrating the technical solutions of the present invention, and not for limiting the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A stay structure, comprising a first stay structure (1), an electrostatic plate (2) and an insulating ring (4);
the insulating ring (4) and the electrostatic plate (2) are both of annular structures, and the insulating ring (4) is connected with one end of the electrostatic plate (2);
the first stay structure (1) is arranged on the inner side and the outer side of the insulating ring (4), and the first stay structure (1) is abutted to the insulating ring (4);
gaps (3) are arranged between the inner side and the outer side of the first supporting strip structure (1) and the electrostatic plate (2).
2. A stay structure according to claim 1, characterized in that the surface of the first stay structure (1) facing the electrostatic plate (2) has a first groove forming the gap (3).
3. A stay structure according to claim 2, characterized in that said first stay structure (1) comprises a plurality of first stays (11) and a plurality of second stays (12);
the first supporting strips (11) are distributed at intervals along the circumferential direction of the electrostatic plate (2), the length direction of the first supporting strips (11) is parallel to the axial direction of the electrostatic plate (2), each first supporting strip (11) is abutted with the outer wall of the insulating ring (4), and the surface, facing the electrostatic plate (2), of each first supporting strip (11) is provided with the first groove;
the second supporting strips (12) are distributed at intervals along the circumferential direction of the electrostatic plate (2), the length direction of the second supporting strips (12) is parallel to the axial direction of the electrostatic plate (2), each second supporting strip (12) is abutted with the inner wall of the insulating ring (4), and the surface of each second supporting strip (12) facing the electrostatic plate (2) is provided with the first groove.
4. A stay structure according to claim 3, further comprising a paper ring (5), wherein the paper ring (5) is of a ring-shaped structure, and the paper ring (5) is connected with one end of the electrostatic plate (2) far away from the insulating ring (4);
the end parts of the first supporting strips (11) and the second supporting strips (12) are abutted with the paper ring (5).
5. A stay structure according to claim 4, further comprising a second stay structure (6) located outside the first stay (11), the second stay structure (6) having a plurality of layers, the plurality of layers of the second stay structure (6) being arranged one after the other in a direction of the first stay (11) away from the electrostatic plate (2).
6. The stay structure according to claim 5, wherein the second stay structure (6) comprises an angle ring (62) and a plurality of third stays (61), the plurality of third stays (61) being arranged one-to-one outside the plurality of first stays (11);
the section of the angle ring (62) is of an L-shaped structure, one end of the angle ring (62) is arranged at one end, far away from the electrostatic plate (2), of the paper ring (5), and the other end of the angle ring (62) is wrapped on the outer side of each third stay (61).
7. The stay structure according to claim 6, wherein one end of the outer surface of the third stay (61) is provided with a second groove;
the angle ring (62) extends into the second groove to cover the outer surface of the third stay (61), and the end of the angle ring (62) extending into the second groove is abutted against the third stay (61) to limit the axial position of the third stay (61).
8. The stay structure according to claim 6, further comprising a cardboard (8), wherein the cardboard (8) is arranged in a ring shape, and wherein the cardboard (8) is sandwiched between the first stay (11) and the third stay (61), and between two adjacent third stays (61).
9. A stay structure according to claim 8, characterized in that the surfaces of the first stay (11) and the third stay (61) facing the cardboard (8) are arc-shaped for conforming to the cardboard (8).
10. A power transformer, characterized by comprising a stay structure according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122809008.0U CN216250360U (en) | 2021-11-16 | 2021-11-16 | Stay structure and power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122809008.0U CN216250360U (en) | 2021-11-16 | 2021-11-16 | Stay structure and power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216250360U true CN216250360U (en) | 2022-04-08 |
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ID=80941997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122809008.0U Active CN216250360U (en) | 2021-11-16 | 2021-11-16 | Stay structure and power transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216250360U (en) |
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2021
- 2021-11-16 CN CN202122809008.0U patent/CN216250360U/en active Active
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