Electrostatic ring of extra-high voltage transformer
By employing a combination of inner and outer insulation layers in the electrostatic ring of an ultra-high voltage transformer, the problem of traditional electrostatic rings failing to meet the requirement of a large inner radius angle and a small outer radius angle has been solved. This simplifies the manufacturing process, reduces costs, and simultaneously improves the structural strength and service life of the electrostatic ring.
Patent Information
- Application Number
- CN202422759391.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-11-12
AI Technical Summary
Traditional electrostatic rings are difficult to meet the special requirements of large inner radius and small outer radius in high-voltage transformers, and are complex and costly to manufacture, and cannot achieve special dimensions in special parts of the insulation layer.
Design an electrostatic ring for an ultra-high voltage transformer, which adopts a combination structure of inner and outer insulation layers. The inner insulation layer includes inner and outer corner rings directly formed on the shielding layer. The surface of the outer insulation layer forms an R-angle, and a coating is applied to the surface of the frame to prevent moisture absorption. The sleeve is fitted on the lead-out line.
This technology enables the creation of different radius angles in specific locations within the insulation layer, simplifying the manufacturing process, reducing costs, and improving the structural strength and lifespan of the electrostatic ring.
Smart Images
Figure CN223624810U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of transformer technology, and in particular relates to an electrostatic ring for an ultra-high voltage transformer. Background Technology
[0002] To improve the electric field distribution near the ends or entry segments of high-voltage windings, electrostatic rings are used on the windings, and the leads of the electrostatic rings are connected to the leads of the windings. Electrostatic rings are usually placed at the ends of the windings, and their function is to compensate for the coil height and to act as a shield to uniformly distribute the electric field at the ends. Traditional electrostatic rings are made of external insulation wrapped with crepe paper, which can only ensure that the insulation is uniformly made, and the inner R-angle of the external insulation wrapped with crepe paper is small and the outer R-angle is large (i.e., small inside and large outside). In DC high-voltage transformers, due to the very complex electric field and the small oil channel gap, additional treatment is required at the R-angle to meet the special requirement of a large inner R-angle and a small outer R-angle.
[0003] Due to structural limitations, the outer radius (R) of existing electrostatic rings depends on the inner radius (R) of the frame. Furthermore, the insulation thickness on all four sides is equal. If a specific thickness is required in a particular area, padding paper is needed. Some special transformers require specific dimensions for certain parts of the insulation layer to meet the need for exceptionally high local field strength. However, if traditional electrostatic rings are to meet these requirements, the manufacturing process is extremely complex and costly, and many dimensions are limited and cannot be achieved. Utility Model Content
[0004] The purpose of this invention is to address the aforementioned technical problems by providing an electrostatic ring for an ultra-high voltage transformer, which meets the requirements of a large inner radius (R-angle) and a small outer radius (R-angle), and can achieve special dimensions in special parts of the insulation layer.
[0005] In view of this, the present invention provides an electrostatic ring for an ultra-high voltage transformer, comprising:
[0006] The skeleton is ring-shaped and has lead-out lines on the side.
[0007] The shielding layer is fitted onto the frame and electrically connected to the lead wires;
[0008] An outer insulating layer is fitted over the shielding layer;
[0009] The inner insulating layer is located between the shielding layer and the outer insulating layer, and is used to change the thickness of the local insulating layer on the outside of the electrostatic ring and to form an R-angle on the surface of the outer insulating layer.
[0010] In the above technical solution, further:
[0011] The inner insulation layer includes an inner corner ring and an outer corner ring, both of which are annular and are directly formed on the shielding layer.
[0012] In the above technical solution, further:
[0013] Both the inner and outer corner rings have an arc-shaped convex surface on the side closest to the inner wall of the outer insulation layer.
[0014] Furthermore, the above technical solution also includes:
[0015] The coating is wrapped around the surface of the skeleton and located between the skeleton and the shielding layer, and is used to prevent the skeleton from absorbing moisture.
[0016] Furthermore, the above technical solution also includes:
[0017] The sleeve is fitted onto the lead wire and is fixedly connected to the outer insulation layer.
[0018] In the above technical solution, further:
[0019] The sleeve includes a main body and a connecting part, with the connecting part located on the side of the main body close to the outer insulation layer and bonded to the outer insulation layer.
[0020] In the above technical solution, further:
[0021] The main body has a corrugated structure.
[0022] The beneficial effects of this utility model are as follows:
[0023] 1. By setting an inner insulating layer to fill between the shielding layer and the outer insulating layer, the thickness of the local insulating layer on the outside of the electrostatic ring can be changed, and different R-angles can be formed at the outer insulating layer as needed to meet special requirements.
[0024] 2. By directly molding the inner insulation layer onto the shielding layer, the manufacturing process can be simplified and costs reduced.
[0025] 3. By applying a coating to the surface of the skeleton, moisture absorption can be prevented, thereby improving the structural strength and service life of the skeleton. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the structure of this utility model;
[0027] Figure 2 This is a partial sectional view of the present invention;
[0028] Figure 3 This is a utility model Figure 2 Enlarged view of point A in the middle;
[0029] The markings in the diagram are as follows: 1. Skeleton; 2. Lead wire; 3. Shielding layer; 4. Outer insulation layer; 5. Inner insulation layer; 50. Inner corner ring; 51. Outer corner ring; 52. Arc-shaped convex surface; 6. Coating; 7. Tube sleeve; 70. Main body; 71. Connecting part. Detailed Implementation
[0030] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.
[0031] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0032] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0033] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.
[0034] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
[0035] Example 1:
[0036] This embodiment provides an electrostatic ring for an ultra-high voltage transformer, comprising:
[0037] The skeleton 1 is ring-shaped and has lead-out lines 2 on its side;
[0038] The shielding layer 3 is fitted onto the frame 1 and is electrically connected to the lead wire 2;
[0039] The outer insulating layer 4 is fitted onto the shielding layer 3;
[0040] The inner insulating layer 5 is located between the shielding layer 3 and the outer insulating layer 4, and is used to change the thickness of the local insulating layer on the outside of the electrostatic ring and to form an R-angle on the surface of the outer insulating layer 4.
[0041] The skeleton 1 can be made of T4 cardboard, the shielding layer 3 can be made of high-strength copper wool braided tape with low resistance, and the outer insulation layer 4 can be made of crepe paper.
[0042] As can be seen from this embodiment, by setting the inner insulating layer 5 to fill between the shielding layer 3 and the outer insulating layer 4, the thickness of the local insulating layer on the outer side of the electrostatic ring can be changed, and different R-angles can be formed at the outer insulating layer 4 as needed to meet special requirements.
[0043] Example 2:
[0044] This embodiment provides an electrostatic ring for an ultra-high voltage transformer, which, in addition to the technical solutions of the above embodiments, also has the following technical features:
[0045] The inner insulating layer 5 includes an inner corner ring 50 and an outer corner ring 51, and both the inner corner ring 50 and the outer corner ring 51 are annular and are directly formed on the shielding layer 3.
[0046] The inner insulation layer 5 can be formed directly onto the shielding layer 3 using pulp under high moisture content conditions, and then dried in an oven after forming, followed by polishing, in order to meet the requirements of different thicknesses and R-angle sizes.
[0047] As can be seen from this embodiment, by directly molding the inner insulating layer 5 onto the shielding layer 3, the manufacturing process can be simplified and the cost reduced;
[0048] Furthermore, it is made by direct molding of pulp, which has strong plasticity and high mechanical strength after drying.
[0049] Example 3:
[0050] This embodiment provides an electrostatic ring for an ultra-high voltage transformer, which, in addition to the technical solutions of the above embodiments, also has the following technical features:
[0051] Both the inner corner ring 50 and the outer corner ring 51 have an arc-shaped convex surface 52 on the side closest to the inner wall of the outer insulating layer 4;
[0052] The curved convex surface 52 can be formed by grinding according to different customer needs.
[0053] As can be seen from this embodiment, by setting the arc-shaped convex surface 52, the electrostatic ring can form an R-angle, and the arc-shaped convex surface 52 is finally formed by grinding. It can be ground according to the requirements of different R-angle sizes, which is simple to manufacture and has high precision.
[0054] Example 4:
[0055] This embodiment provides an electrostatic ring for an ultra-high voltage transformer, which, in addition to the technical solutions of the above embodiments, also has the following technical features and includes:
[0056] The coating 6 is wrapped around the surface of the skeleton 1 and located between the skeleton 1 and the shielding layer 3, and is used to prevent the skeleton 1 from absorbing moisture.
[0057] The specific material of coating 6 should meet the requirements of ultra-high voltage transformers, etc. This application does not limit it, as it is prior art and will not be described in detail here.
[0058] As can be seen from this embodiment, by setting the coating 6 on the surface of the skeleton 1, it can be used to prevent the skeleton 1 from absorbing moisture, thereby improving the structural strength and service life of the skeleton 1.
[0059] Furthermore, the coating 6 can prevent water from eroding the skeleton 1 when the pulp is formed under high moisture content conditions, thus ensuring the structural strength and stability of the skeleton 1.
[0060] Example 5:
[0061] This embodiment provides an electrostatic ring for an ultra-high voltage transformer, which, in addition to the technical solutions of the above embodiments, also has the following technical features and includes:
[0062] The sleeve 7 is fitted onto the lead wire 2 and is fixedly connected to the outer insulation layer 4;
[0063] The sleeve 7 can be made of insulating materials such as paper, plastic or rubber. This application does not limit the materials used, as they are existing technologies and will not be described in detail here.
[0064] As can be seen from this embodiment, the sleeve 7 ensures the protection of the lead wire 2, preventing it from external physical damage and the influence of the external environment, thus improving reliability and stability. It also effectively insulates the lead wire 2 and prevents direct current leakage.
[0065] Example 6:
[0066] This embodiment provides an electrostatic ring for an ultra-high voltage transformer, which, in addition to the technical solutions of the above embodiments, also has the following technical features:
[0067] The sleeve 7 includes a main body 70 and a connecting part 71, and the connecting part 71 is located on the side of the main body 70 close to the outer insulation layer 4 and is bonded to the outer insulation layer 4.
[0068] As can be seen from this embodiment, by bonding the sleeve to the outer insulation layer 4, the operation is convenient, and the setting of the connection part 71 effectively improves the connection strength and the stability of the sleeve 7.
[0069] Example 7:
[0070] This embodiment provides an electrostatic ring for an ultra-high voltage transformer, which, in addition to the technical solutions of the above embodiments, also has the following technical features:
[0071] The main body 70 has a corrugated structure.
[0072] As can be seen from this embodiment, by adopting a corrugated structure for the main body 70 of the sleeve 7, the generation of creases and the stretching of the sleeve 7 can be reduced when the sleeve 7 follows the lead wire 2 for bending, thereby avoiding tearing caused by uneven stress distribution on the surface of the sleeve 7, improving the structural stability of the sleeve 7, and extending the service life of the sleeve 7.
[0073] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.
Claims
1. An electrostatic ring for an ultra-high voltage transformer, characterized in that, include: The skeleton (1) is ring-shaped and has lead wires (2) on the side. The shielding layer (3) is fitted on the frame (1) and electrically connected to the lead wire (2); An outer insulating layer (4) is fitted over a shielding layer (3); The inner insulating layer (5) is located between the shielding layer (3) and the outer insulating layer (4), and is used to change the thickness of the local insulating layer on the outside of the electrostatic ring and to form an R-angle on the surface of the outer insulating layer (4).
2. The electrostatic ring for an ultra-high voltage transformer according to claim 1, characterized in that: The inner insulating layer (5) includes an inner corner ring (50) and an outer corner ring (51), and both the inner corner ring (50) and the outer corner ring (51) are annular and are directly formed on the shielding layer (3).
3. The electrostatic ring for an ultra-high voltage transformer according to claim 2, characterized in that: Both the inner corner ring (50) and the outer corner ring (51) have an arc-shaped convex surface (52) on the side near the inner wall of the outer insulating layer (4).
4. The electrostatic ring for an ultra-high voltage transformer according to claim 1, characterized in that, Also includes: The coating (6) is wrapped around the surface of the skeleton (1) and located between the skeleton (1) and the shielding layer (3), and is used to prevent the skeleton (1) from absorbing moisture.
5. The electrostatic ring for an ultra-high voltage transformer according to claim 1, characterized in that, Also includes: The sleeve (7) is fitted onto the lead wire (2) and is fixedly connected to the outer insulation layer (4).
6. The electrostatic ring for an ultra-high voltage transformer according to claim 5, characterized in that: The sleeve (7) includes a main body (70) and a connecting part (71), and the connecting part (71) is located on the side of the main body (70) close to the outer insulation layer (4) and is bonded to the outer insulation layer (4).
7. The electrostatic ring for an ultra-high voltage transformer according to claim 6, characterized in that: The main body (70) has a corrugated structure.