Integrally-formed high-precision distribution transformer insulation end ring

Abstract

The utility model belongs to the technical field of transformer accessories, and particularly relates to an integrally-formed high-precision distribution transformer insulation end ring which comprises a main body, and the main body comprises a circular end face and a spiral end face which are located on the two axial sides. Wherein the main body is formed by winding an integrally formed paperboard; the main body of the insulating end ring is formed by winding the integrally formed paperboard, so that the structural stability is effectively ensured, the forming precision of each layer can be ensured, secondary repair is not needed, the processing period is effectively shortened, and the processing efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of transformer accessories, and in particular relates to an integrally molded high-precision distribution transformer insulation end ring. Background Technology

[0002] The insulating end rings of distribution transformers are typically designed in a circular shape and manufactured using an insulating paperboard lamination process. These end rings are installed at the bottom and top of the transformer. The side that contacts the voltage regulating coil remains flat, while the side that does not contact it has a spirally rising slope design, meaning that this end has a significant height difference compared to the other end.

[0003] For example, Chinese patent application number (CN201720166391.3) discloses an insulating end ring on a transformer voltage regulating coil, including a cylindrical enclosure with a vertical opening formed by folding multiple layers of insulating paper. The upper end of the cylindrical enclosure has a spiral edge. The vertical opening of the cylindrical enclosure is fixed by binding with a ribbon through holes on both sides of the opening. Although this application reduces production costs by opening holes and binding with a ribbon through the holes, it can easily affect the structural stability and accuracy of the insulating end ring. Specifically, the ribbon is prone to causing stress concentration in the holes, which needs to be improved. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned technical problems by providing an integrally molded high-precision transformer insulation end ring, achieving both good structural stability and high precision.

[0005] In view of this, the present invention provides an integrally molded high-precision transformer insulation end ring, comprising:

[0006] The main body includes a circular end face and a helical end face located on both sides of the axial direction;

[0007] The main body is formed by rolling a single piece of cardboard.

[0008] Furthermore, the above technical solution also includes:

[0009] The helical end face includes an axial proximal end face that is close to the circular end face in the axial direction and an axial distal end face that is far away from the circular end face in the axial direction.

[0010] In the above technical solution, further:

[0011] A connecting portion is provided between the axial proximal end face and the axial distal end face.

[0012] In the above technical solution, further:

[0013] A cable outlet hole is provided on the connecting part.

[0014] In the above technical solution, further:

[0015] The outlet hole is elliptical, with the two ends of the major axis of the ellipse facing the near end face and the far end face, respectively.

[0016] In the above technical solution, further:

[0017] The connecting part includes connecting ends located at both ends of the major axis of the ellipse and force-bearing ends located at both ends of the minor axis of the ellipse;

[0018] The connecting ends and the force-bearing ends at both ends are symmetrically arranged.

[0019] In the above technical solution, further:

[0020] A first fillet is provided between the axial near-end face and the surface of the connecting part;

[0021] A vertical end face is formed on the side of the axial distal end face near the connecting part, and a second rounded corner is provided between the vertical end face and the surface of the connecting part.

[0022] The beneficial effects of this utility model are as follows:

[0023] 1. By using a one-piece molded cardboard roll to form the main body of the insulating end ring, the structural stability is effectively guaranteed, and the molding accuracy of each layer can be guaranteed. No secondary repair is required, which effectively shortens the processing cycle and improves processing efficiency.

[0024] 2. The connection part enables the layers to be connected, which facilitates processing and effectively improves the connection stability between the layers, ensuring the overall stability of the end ring.

[0025] 3. By opening an elliptical cable outlet hole on the connection part, it is possible to facilitate cable outlet while ensuring tensile strength through the elliptical shape. This reduces the impact of the cable outlet hole on structural stability. Furthermore, the two ends of the major axis of the ellipse are close to the axial near end face and the axial far end face, respectively, thereby preventing the two ends of the minor axis from becoming stress points and effectively ensuring structural stability.

[0026] 4. A first fillet is provided between the axial near end face of the connecting part and the main body, and a second fillet is provided between the connecting part and the axial far end face of the main body. This can further eliminate stress concentration at the connection point, avoid the connection point from being easily torn due to the opening of the spiral end face, and ensure structural stability. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 This is a utility model Figure 1Enlarged view of point A in the middle;

[0029] The markings in the diagram are as follows: 1. Main body; 2. Circular end face; 3. Spiral end face; 30. Axial proximal end face; 31. Axial distal end face; 4. Connecting part; 40. Connecting end; 41. Force-bearing end; 5. Outlet hole; 6. First fillet; 7. Second fillet. 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 limitation, 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 integrally molded high-precision transformer insulation end ring, including:

[0037] The main body 1 includes a circular end face 2 and a spiral end face 3 located on both sides of the axial direction;

[0038] The main body 1 is formed by rolling a single piece of cardboard.

[0039] Meanwhile, the main body 1 can be made of phenolic paper and formed by laser cutting, which can effectively ensure the processing accuracy.

[0040] As can be seen from this embodiment, by using an integrally molded cardboard roll to form the main body 1 of the insulating end ring, the structural stability is effectively guaranteed, and the molding accuracy of each layer can be guaranteed. No secondary repair is required, which effectively shortens the processing cycle and improves the processing efficiency.

[0041] Example 2:

[0042] This embodiment provides an integrally molded high-precision distribution transformer insulation end ring, which, in addition to the technical solutions of the above embodiments, also has the following technical features, and further includes:

[0043] The spiral end face 3 includes an axially proximal end face 30 that is close to the circular end face 2 in the axial direction and an axially distal end face 31 that is far away from the circular end face 2 in the axial direction.

[0044] As can be seen from this embodiment, by forming the helical end face 3 into an axial near end face 30 and an axial far end face, the two ends of the helical end face 3 are kept flush, making the entire end ring more regular and uniform in structure, which helps to reduce the internal stress caused by misalignment and ensure the stability of the structure.

[0045] Example 3:

[0046] This embodiment provides a one-piece molded high-precision transformer insulation end ring, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0047] The main body 1 also includes a connecting part 4 located between the axial proximal end face 30 and the axial distal end face 31.

[0048] As can be seen from this embodiment, the connection part 4 enables the connection between the layers, which facilitates processing and effectively improves the connection stability between the layers, thus ensuring the overall stability of the end ring.

[0049] Example 4:

[0050] This embodiment provides a one-piece molded high-precision transformer insulation end ring, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0051] A cable outlet hole 5 is provided on the connecting part 4.

[0052] As can be seen from this embodiment, by opening an elliptical wire outlet hole 5 on the connecting part 4, it is convenient to run wires and avoid affecting the installation of the transformer coil.

[0053] Example 5:

[0054] This embodiment provides a one-piece molded high-precision transformer insulation end ring, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0055] The outlet hole 5 is elliptical, and the two ends of the major axis of the ellipse face 30 and the far end face 31 face 31 face 31 face 30 face 30 face 31 ...1 face 30 face 31 face

[0056] As can be seen from this embodiment, while facilitating wire exit, the elliptical shape ensures tensile strength, reduces the impact of the wire exit hole 5 on structural stability, and the two ends of the major axis of the ellipse are close to the axial near end face 30 and the axial far end face 31 respectively, thereby avoiding the two ends of the minor axis from becoming stress points and effectively ensuring structural stability.

[0057] Example 6:

[0058] This embodiment provides a one-piece molded high-precision transformer insulation end ring, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0059] The connecting part 4 includes connecting ends 40 located at both ends of the major axis of the ellipse and force-bearing ends 41 located at both ends of the minor axis of the ellipse;

[0060] The connecting ends 40 at both ends and the force-bearing ends 41 at both ends are symmetrically arranged.

[0061] As can be seen from this embodiment, the connection end 40 and the force-bearing end 41 facilitate the connection between the two ends of the connection part 4, and the symmetrical arrangement ensures that the force-bearing end 41 and the connection end 40 at both ends are subjected to uniform force, which helps the stability of the structure.

[0062] Example 7:

[0063] This embodiment provides a one-piece molded high-precision transformer insulation end ring, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0064] A first fillet 6 is provided between the axial near-end face 30 and the surface of the connecting part 4;

[0065] A vertical end face is formed on the side of the axial distal end face 31 near the connecting part 4, and a second rounded corner 7 is provided between the vertical end face and the surface of the connecting part 4.

[0066] As can be seen from this embodiment, by providing a first fillet 6 between the connecting part 4 and the axial near end face 30 of the main body 1 and a second fillet 7 between the connecting part 4 and the axial far end face 31 of the main body 1, stress concentration at the connection can be further eliminated, and the connection can be prevented from tearing easily due to the opening of the spiral end face 3, thus ensuring structural stability.

[0067] 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. A one-piece molded high-precision transformer insulating end ring, characterized in that, include: The main body (1) includes a circular end face (2) and a spiral end face (3) located on both sides of the axis; The main body (1) is formed by rolling a single piece of cardboard.

2. The integrally molded high-precision transformer insulation end ring according to claim 1, characterized in that, Also includes: The spiral end face (3) includes an axially proximal end face (30) that is close to the circular end face (2) in the axial direction and an axially distal end face (31) that is far away from the circular end face (2) in the axial direction.

3. The integrally molded high-precision transformer insulation end ring according to claim 2, characterized in that: The main body (1) also includes a connecting portion (4) located between the axial proximal end face (30) and the axial distal end face (31).

4. The integrally molded high-precision transformer insulation end ring according to claim 3, characterized in that: The connecting part (4) is provided with a wire outlet hole (5).

5. The integrally molded high-precision transformer insulating end ring according to claim 4, characterized in that: The outlet hole (5) is elliptical, and the two ends of the major axis of the ellipse face the axial near end face (30) and the axial far end face (31), respectively.

6. The integrally molded high-precision transformer insulation end ring according to claim 5, characterized in that: The connecting part (4) includes connecting ends (40) located at both ends of the major axis of the ellipse and force-bearing ends (41) located at both ends of the minor axis of the ellipse; The connecting ends (40) at both ends and the force-bearing ends (41) at both ends are symmetrically arranged.

7. The integrally molded high-precision transformer insulating end ring according to claim 3, characterized in that: A first fillet (6) is provided between the axial near end face (30) and the surface of the connecting part (4); The axial distal end face (31) has a vertical end face on the side near the connecting part (4), and a second rounded corner (7) is provided between the vertical end face and the surface of the connecting part (4).

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