High-strength slotted end ring for transformer insulation

Abstract

The utility model belongs to the technical field of transformer end rings, and particularly relates to a high-strength slotted end ring for transformer insulation, which comprises a circular end face and a spiral end face, the circular end face comprises a plurality of layers of first paperboards with the same length, and the spiral end face is connected to one side of the circular end face and comprises a plurality of layers of second paperboards with different lengths, the circular end face and the spiral end face are correspondingly provided with communicated notches. The spiral end face is arranged on one side of the circular end face, so that the structure of the end ring is more stable, the spiral structure has natural torsion resistance and bending resistance, various stresses and impacts from the inside and outside of the transformer can be effectively resisted, and when the end ring is subjected to external force, the spiral structure can guide the stresses to be dispersed in the spiral line direction, so that the stability of the end ring is improved. The structural strength is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformer end rings, in particular to a high-strength slotted end ring for transformer insulation. Background Art

[0002] End rings are important insulating and structural components in power equipment such as transformers. Their main function is to provide insulation, but they are also commonly used to fix and support the windings to ensure that the windings maintain a stable position during transformer operation, prevent damage caused by vibration or other mechanical stress, and ensure sufficient insulation distance between the windings and the transformer box or other metal parts.

[0003] Traditional transformer end rings are usually rounded to make them cylindrical, but the processing cycle of the end rings is long and the assembly is difficult. Chinese patent application number (CN201210121690.7) discloses a method for manufacturing insulating end rings of high-voltage converter transformers. The application mills grooves on a hot-pressed insulating plate, and adjusts the size, spacing and front and back positions of the milling grooves to enable it to be bent into different specified shapes, thereby shortening the processing cycle and improving the convenience of assembly. However, it adopts a single circular end face structure, and the structural strength and stability are relatively low, which needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to solve the above-mentioned technical problems and provide a high-strength slotted end ring for transformer insulation, thereby achieving the effect of improving structural strength and stability.

[0005] In view of this, the utility model provides a high-strength slotted end ring for transformer insulation, comprising:

[0006] The circular end surface comprises multiple layers of first paperboards of the same length;

[0007] a spiral end surface connected to one side of the circular end surface and comprising multiple layers of second paperboards of different lengths;

[0008] Wherein, communicating notches are correspondingly provided on the circular end surface and the spiral end surface.

[0009] In the above technical solution, further:

[0010] A plurality of first paperboards are stacked layer by layer in a direction away from the spiral end surface;

[0011] The multiple layers of second paperboard are stacked layer by layer in a direction away from the circular end surface, and the length of each layer of the second paperboard decreases in sequence at equal distances.

[0012] In the above technical solution, further:

[0013] One ends of the multiple layers of first paperboard and the multiple layers of second paperboard are kept flush.

[0014] In the above technical solution, further:

[0015] The multiple layers of second paperboard form multiple level conversion points during the stacking process, and the notches are opened on the level conversion points.

[0016] In the above technical solution, further:

[0017] The multi-layer second paperboard is provided with chamfers at multiple layer transition points.

[0018] In the above technical solution, further:

[0019] The notch is one of a V-shaped groove, a rectangular groove or a U-shaped groove.

[0020] In the above technical solution, further:

[0021] The multi-layer first paperboard and the multi-layer second paperboard are formed by hot pressing.

[0022] The beneficial effects of the utility model are:

[0023] 1. By setting a spiral end face on one side of the circular end face, the structure of the end ring is made more stable. The spiral structure has natural torsion and bending resistance, which can effectively withstand various stresses and impacts from inside and outside the transformer. When the end ring is subjected to external force, the spiral structure can guide the stress to disperse along the spiral line direction, effectively improving the structural strength.

[0024] 2. The circular end face and the spiral end face are formed by stacking multiple layers of first paperboard and multiple layers of second paperboard respectively, so that the end face has better compression resistance, further improving the structural strength and stability.

[0025] 3. By forming multiple level transition points during the stacking of multiple layers of second cardboard, and opening notches at the level transition points, it is easy to inspect after the notches are opened, thus improving the convenience of quality inspection;

[0026] 4. By providing chamfers at the level transition points of the multiple layers of second paperboard, the multiple layers of second paperboard are prevented from being warped at the level transition points by external forces, thereby improving the connection strength and stability between the multiple layers of second paperboard. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of the utility model;

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

[0029] The markings in the figure are: 1. circular end face; 2. first cardboard; 3. spiral end face; 4. second cardboard; 5. notch; 6. level transition point; 7. chamfer. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0031] In the description of this application, it should be noted that the terms used herein are only for the purpose of describing specific embodiments and are 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 according to the actual proportional relationship. Technologies, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, technologies, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0032] It should be noted that the terms "first," "second," etc. in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and that the objects distinguished by "first," "second," etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0033] It should be noted that, in the description of this application, the directions or positional relationships indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional terms do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional terms "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0034] It should be noted that, in the present application, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0035] Example 1:

[0036] This embodiment provides a high-strength slotted end ring for transformer insulation, comprising:

[0037] The circular end surface 1 comprises multiple layers of first paperboard 2 of the same length;

[0038] The spiral end surface 3 is connected to one side of the circular end surface 1 and includes multiple layers of second paperboard 4 with different lengths;

[0039] The circular end surface 1 and the spiral end surface 3 are provided with corresponding communicating notches 5;

[0040] Meanwhile, the first paperboard 2 and the second paperboard 4 are both insulating paperboards, which are prior art and will not be described in detail here.

[0041] It can be seen from this embodiment that by providing a spiral end face 3 on one side of the circular end face 1, the structure of the end ring is more stable. The spiral structure has natural torsion and bending resistance, and can effectively withstand various stresses and impacts from inside and outside the transformer. When the end ring is subjected to external force, the spiral structure can guide the stress to be dispersed along the spiral line direction, effectively improving the structural strength.

[0042] Example 2:

[0043] This embodiment provides a high-strength slotted end ring for transformer insulation. In addition to the technical solutions of the above embodiments, it also has the following technical features:

[0044] A plurality of first paperboards 2 are stacked layer by layer in a direction away from the spiral end surface 3;

[0045] The multiple layers of second paperboard 4 are stacked layer by layer in a direction away from the circular end surface 1 , and the length of each layer of second paperboard 4 decreases in sequence at equal distances.

[0046] It can be seen from this embodiment that by stacking the circular end face 1 and the spiral end face 3 by multiple layers of first paperboard 2 and multiple layers of second paperboard 4 respectively, the end face has better compression resistance, further improving the structural strength and stability.

[0047] Example 3:

[0048] This embodiment provides a high-strength slotted end ring for transformer insulation. In addition to the technical solutions of the above embodiments, it also has the following technical features:

[0049] One end of the multi-layer first paperboard 2 and the multi-layer second paperboard 4 are kept flush.

[0050] It can be seen from this embodiment that by keeping one end of multiple first paperboards 2 and one end of multiple second paperboards 4 flush, the entire end ring is made more regular and unified in structure, which helps to reduce internal stress caused by misalignment and improve the stability of the overall structure.

[0051] Example 4:

[0052] This embodiment provides a high-strength slotted end ring for transformer insulation. In addition to the technical solutions of the above embodiments, it also has the following technical features:

[0053] During the stacking process, the multiple layers of second paperboard 4 form multiple layer transition points 6 , and the notches 5 are opened on the layer transition points 6 .

[0054] It can be seen from this embodiment that by forming multiple level transition points 6 during the stacking of multiple layers of second paperboards 4 and opening the notches 5 at the level transition points 6, it is convenient to inspect the notches 5 after they are opened, thereby improving the convenience of quality inspection and making it easier to find the position of each level transition point 6 and notch 5 on the end ring.

[0055] Example 5:

[0056] This embodiment provides a high-strength slotted end ring for transformer insulation. In addition to the technical solutions of the above embodiments, it also has the following technical features:

[0057] The multi-layer second paperboard 4 is provided with chamfers 7 at multiple layer transition points 6 .

[0058] It can be seen from this embodiment that by providing chamfers 7 on the multiple layers of second paperboard 4 at the layer transition points 6, the multiple layers of second paperboard 4 are prevented from being tilted by external forces at the layer transition points 6, thereby improving the connection strength and stability between the multiple layers of second paperboard 4.

[0059] Example 6:

[0060] This embodiment provides a high-strength slotted end ring for transformer insulation. In addition to the technical solutions of the above embodiments, it also has the following technical features:

[0061] The notch 5 is one of a V-shaped groove, a rectangular groove or a U-shaped groove;

[0062] The notch 5 shown in the accompanying drawings is a V-shaped groove.

[0063] It can be seen from this embodiment that by adopting a V-shaped notch 5 , the end ring is facilitated to bend, thereby improving the adaptability during assembly.

[0064] Example 7:

[0065] This embodiment provides a high-strength slotted end ring for transformer insulation. In addition to the technical solutions of the above embodiments, it also has the following technical features:

[0066] The multi-layer first paperboard 2 and the multi-layer second paperboard 4 are formed by hot pressing.

[0067] It can be seen from this embodiment that by hot pressing the multi-layer first paperboard 2 and the multi-layer second paperboard 4, the close bonding between the layers is effectively improved, so that they form an integral structure, which effectively improves the structural strength, helps to resist various stresses and vibrations generated during the operation of the transformer, and ensures the stability and reliability of the end ring.

[0068] The embodiments of the present application are described above in conjunction with the accompanying drawings. Unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A high-strength slotted end ring for transformer insulation, characterized in that: include: The circular end surface (1) comprises multiple layers of first paperboard (2) of the same length; A spiral end surface (3) is connected to one side of the circular end surface (1) and includes multiple layers of second paperboard (4) of different lengths; Wherein, the circular end surface (1) and the spiral end surface (3) are provided with corresponding communicating notches (5).

2. The high-strength slotted end ring for transformer insulation according to claim 1, characterized in that: The plurality of first paperboards (2) are stacked layer by layer in a direction away from the spiral end surface (3); The multiple layers of the second paperboard (4) are stacked layer by layer in a direction away from the circular end surface (1), and the length of each layer of the second paperboard (4) decreases in sequence at equal distances.

3. The high-strength slotted end ring for transformer insulation according to claim 2, characterized in that: One ends of the multiple layers of the first paperboard (2) and the multiple layers of the second paperboard (4) are kept flush.

4. The high-strength slotted end ring for transformer insulation according to claim 3, characterized in that: The multiple layers of the second paperboard (4) form a plurality of level transition points (6) during the stacking process, and the notches (5) are opened on the level transition points (6).

5. The high-strength slotted end ring for transformer insulation according to claim 4, characterized in that: The multi-layer second paperboard (4) is provided with chamfers (7) at multiple layer transition points (6).

6. The high-strength slotted end ring for transformer insulation according to claim 1, characterized in that: The notch (5) is one of a V-shaped groove, a rectangular groove or a U-shaped groove.

7. The high-strength slotted end ring for transformer insulation according to claim 1, characterized in that: The multiple layers of the first paperboard (2) and the multiple layers of the second paperboard (4) are formed by hot pressing.

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