A waterproof transformer coil structure and its manufacturing method

Abstract

The present invention discloses a waterproof transformer coil structure and a manufacturing method thereof, comprising: an insulating cylinder for supporting the transformer coil; a spacer for winding with the transformer coil, the spacer being installed on the insulating cylinder, and a strip-shaped notch being provided on the spacer; and a winding wire wound on the strip-shaped notch. The waterproof transformer coil structure increases the waterproof and hydrophobic ability of the coil and enhances the waterproof performance of the transformer through the spacer and the strip-shaped notch provided on the spacer.

Description

Technical Field

[0001] The present invention relates to the field of transformers, and particularly relates to a waterproof transformer coil structure and a manufacturing method thereof. Background Art

[0002] In recent years, waterlogging has caused the basement power distribution equipment to be flooded and burned out, resulting in power outages. As a key component of the power distribution equipment, once a transformer is burned out, it is difficult and time-consuming to replace it on site, which will cause long-term power outages, seriously reducing the efficiency of restoring power supply in the urban power grid and causing great inconvenience to the lives and production of the people. Due to considerations of safety, reliability, fire prevention, etc., dry-type transformers are mainly configured for basements. As the core component of the transformer, the performance of the coil directly affects whether the product can operate normally. However, when a dry-type transformer encounters waterlogging, after the coil is soaked by the waterlogging, it will inevitably become damp, its electrical performance will decrease, and even burn out, thus affecting the normal operation of the product. The traditional waterproof transformer uses epoxy casting to cast the coil into a whole, with a complex process, high material and production costs, and when the product has been operating for some time, "silver streaks" are likely to appear on the coil, reducing the electrical performance and waterproof ability of the product. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a waterproof transformer coil structure and a manufacturing method thereof. The waterproof transformer coil structure solves the problems that the coil of a dry-type transformer is prone to moisture absorption and a decrease in electrical performance after being affected by waterlogging, and a manufacturing method is provided, achieving the technical effects of simple and reliable operation and improving the cost performance of the product.

[0004] The present invention provides a waterproof transformer coil structure having the above functions. The waterproof transformer coil structure is characterized by comprising: an insulating cylinder for supporting the transformer coil; a spacer for winding with the transformer coil, the spacer being mounted on the insulating cylinder, and the spacer being provided with a strip-shaped notch; and a winding wire wound on the strip-shaped notch.

[0005] According to the waterproof transformer coil structure of the embodiment of the present invention, it has at least the following technical effects: the waterproof transformer coil structure increases the waterproof and hydrophobic ability of the coil and enhances the waterproof performance of the transformer through the spacer and the strip-shaped notch provided on the spacer.

[0006] According to the waterproof transformer coil structure of the embodiments of the present invention, a plurality of spacers are provided, and the spacers are evenly arranged on the outer wall of the insulating cylinder and evenly distributed on the insulating cylinder. The spacers can enhance the hydrophobic ability of the waterproof transformer coil, and water can flow out of the coil along the spacers, without water accumulation. The spacers evenly distributed on the insulating cylinder can enhance the mechanical strength of the insulating cylinder.

[0007] According to the waterproof transformer coil structure of the embodiments of the present invention, the strip-shaped notches are evenly arranged on the outer edge of the spacers and evenly distributed on the spacers. The strip-shaped notches evenly distributed on the spacers can enhance the mechanical strength of the spacers, and the winding wire is wound on the strip-shaped notches. Therefore, the even distribution of the strip-shaped notches can maintain the electrical performance of the transformer.

[0008] According to the waterproof transformer coil structure of the embodiments of the present invention, bent notches for facilitating hydrophobicity are respectively arranged at both ends of the spacers. Inserting the angle ring into the bent notches can enhance the electrical performance and reduce water accumulation inside the coil.

[0009] According to the waterproof transformer coil structure of the embodiments of the present invention, the bent notch includes an inclined part and a vertical part for facilitating drainage, and the inclined part is connected to the vertical part. The inclined part is convenient for hydrophobicity, and the vertical part can enhance the electrical performance and reduce water accumulation inside the coil after inserting the angle ring.

[0010] According to the waterproof transformer coil structure of the embodiments of the present invention, it further includes an angle ring. The outer end face of the angle ring is lower than the inner end face of the angle ring. The angle ring is arranged on the bent notch of the spacer and is made of silicone rubber material. The outer end face of the angle ring being lower than the inner end face of the angle ring can facilitate the outward flow of water and reduce the probability of water accumulation inside the transformer coil.

[0011] According to the waterproof transformer coil structure of the embodiments of the present invention, the winding wire includes a metal wire conductor, a first polyimide film, a first insulating paper, a second insulating paper, and a second polyimide film. The metal wire conductor, the first polyimide film, the first insulating paper, the second insulating paper, and the second polyimide film are wrapped in sequence, and the winding wire is wound on the strip-shaped notch. The sequential wrapping of the metal wire conductor, the first polyimide film, the first insulating paper, the second insulating paper, and the second polyimide film can enhance the insulation of the metal wire conductor and prevent the occurrence of circuit short - circuit due to water immersion.

[0012] According to the waterproof transformer coil structure of the embodiments of the present invention, it further includes an insulating ring. The insulating ring is arranged on the two end faces of the winding wire and is made of insulating material. The insulating ring is used to enhance the insulation performance of the transformer coil.

[0013] The method for manufacturing a waterproof transformer coil according to an embodiment of the present invention includes: processing an insulating material or an insulating board into a cylindrical structure to form an insulating cylinder; processing a spacer into an insulating material, and processing a strip-shaped notch in the middle of the spacer; uniformly arranging and fixing the spacers on the surface of the insulating cylinder; winding a winding wire on the strip-shaped notch of the spacer to form a coil turn.

[0014] The method for manufacturing a waterproof transformer coil according to an embodiment of the present invention further includes: inserting insulating rings at the upper and lower end faces of the coil turn; inserting angle rings along the bent notches of the spacers; performing a first baking on the waterproof transformer coil; performing a first vacuum impregnation on the waterproof transformer coil; performing a second baking on the waterproof transformer coil; performing a second vacuum impregnation on the waterproof transformer coil; performing a third baking on the waterproof transformer coil; applying a hydrophobic coating on the surface of the waterproof transformer coil.

[0015] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0017] Figure 1 is a schematic diagram of the structure of a waterproof transformer coil according to an embodiment of the present invention;

[0018] Figure 2 is a schematic diagram of a spacer of the structure of a waterproof transformer coil according to an embodiment of the present invention;

[0019] Figure 3 is a schematic diagram of a winding wire of the structure of a waterproof transformer coil according to an embodiment of the present invention;

[0020] Figure 4 is a schematic diagram of an angle ring of the structure of a waterproof transformer coil according to an embodiment of the present invention;

[0021] Figure 5 is a schematic diagram of an insulating ring of the structure of a waterproof transformer coil according to an embodiment of the present invention;

[0022] Reference numerals:

[0023] insulating cylinder 101,

[0024] spacer 201, strip-shaped notch 202, bent notch 203, inclined portion 204, vertical portion 205,

[0025] winding wire 301, metal wire conductor 302, first polyimide film 303, first insulating paper 304, second insulating paper 305, second polyimide film 306,

[0026] Corner ring 401,

[0027] Insulating ring 501. Specific implementation manner

[0028] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0030] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is two or more, "greater than", "less than", "exceeding", etc. are understood as not including the present number, and "above", "below", "within", etc. are understood as including the present number. If the first and second are described only for the purpose of distinguishing technical features, they should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0032] Referring to Figure 1 , the present invention provides a waterproof transformer coil structure having the above functions. The waterproof transformer coil structure is characterized in that it includes: an insulating cylinder 101 for supporting the transformer coil; a spacer 201 for winding with the transformer coil, the spacer 201 is installed on the insulating cylinder 101, and a strip-shaped notch 202 is provided on the spacer 201; a winding wire 301, and the winding wire 301 is wound on the strip-shaped notch 202.

[0033] Referring to Figure 1 , according to the waterproof transformer coil structure of the embodiment of the present invention, it has at least the following technical effects: the waterproof transformer coil structure increases the waterproof and hydrophobic ability of the coil through the spacer 201 and the strip-shaped notch 202 provided on the spacer 201, and enhances the waterproof performance of the transformer.

[0034] Reference Figure 2 For the waterproof transformer coil structure according to an embodiment of the present invention, a plurality of spacers 201 are provided. The spacers 201 are evenly arranged on the outer wall of the insulating cylinder 101 and are evenly distributed on the insulating cylinder 101. The spacers 201 can enhance the hydrophobic ability of the waterproof transformer coil. Water can flow out of the coil along the spacers 201, and water accumulation will not occur. The uniform distribution of the spacers 201 on the insulating cylinder 101 can enhance the mechanical strength of the insulating cylinder 101.

[0035] Reference Figure 2 For the waterproof transformer coil structure according to an embodiment of the present invention, strip-shaped notches 202 are evenly arranged on the outer edge of the spacers 201 and are evenly distributed on the spacers 201. The uniform distribution of the strip-shaped notches 202 on the spacers 201 can enhance the mechanical strength of the spacers 201. The winding wire 301 is wound on the strip-shaped notches 202. Therefore, the uniform distribution of the strip-shaped notches 202 can maintain the electrical performance of the transformer.

[0036] Reference Figure 2 For the waterproof transformer coil structure according to an embodiment of the present invention, bent notches 203 for facilitating hydrophobicity are respectively provided at both ends of the spacers 201. Inserting the angle ring 401 into the bent notches 203 can enhance the electrical performance and reduce water accumulation inside the coil.

[0037] Reference Figure 2 For the waterproof transformer coil structure according to an embodiment of the present invention, the bent notch 203 includes an inclined portion 204 for facilitating drainage and a vertical portion 205. The inclined portion 204 is connected to the vertical portion 205. The inclined portion 204 is convenient for hydrophobicity, and the vertical portion 205 can enhance the electrical performance and reduce water accumulation inside the coil after inserting the angle ring 401.

[0038] Reference Figure 1 and Figure 4 For the waterproof transformer coil structure according to an embodiment of the present invention, it further includes an angle ring 401. The outer end face of the angle ring 401 is lower than the inner end face of the angle ring 401. The angle ring 401 is arranged on the bent notch 203 of the spacer 201 and is made of silicone rubber material. The outer end face of the angle ring 401 being lower than the inner end face of the angle ring 401 can facilitate the water to flow outwards and reduce the probability of water accumulation inside the transformer coil.

[0039] Reference Figure 1 and Figure 3, For the waterproof transformer coil structure according to an embodiment of the present invention, the winding wire 301 includes a metal wire conductor 302, a first polyimide film 303, a first insulating paper 304, a second insulating paper 305, and a second polyimide film 306. The metal wire conductor 302, the first polyimide film 303, the first insulating paper 304, the second insulating paper 305, and the second polyimide film 306 are wrapped in sequence, and the winding wire 301 is wound around the strip-shaped notch 202. The sequential wrapping of the metal wire conductor 302, the first polyimide film 303, the first insulating paper 304, the second insulating paper 305, and the second polyimide film 306 can strengthen the insulation of the metal wire conductor 302 and prevent the occurrence of a short circuit in the circuit due to water immersion.

[0040] Refer to Figure 1 and Figure 5 , For the waterproof transformer coil structure according to an embodiment of the present invention, it further includes an insulating ring 501. The insulating ring 501 is arranged on the two end faces of the winding wire 301 and is made of an insulating material. The insulating ring 501 is used to enhance the insulation performance of the transformer coil.

[0041] Refer to Figure 1 , For the manufacturing method of the waterproof transformer coil according to an embodiment of the present invention, it includes: processing an insulating material or insulating board into a cylindrical structure to form an insulating cylinder 101; processing a support bar 201 from an insulating material and processing a strip-shaped notch 202 in the middle of the support bar 201; uniformly arranging and fixing the support bar 201 on the surface of the insulating cylinder 101; winding the winding wire 301 around the strip-shaped notch 202 of the support bar 201 to form a coil cake.

[0042] Refer to Figure 1 , For the manufacturing method of the waterproof transformer coil according to an embodiment of the present invention, it further includes: inserting the insulating ring 501 into the upper and lower end faces of the coil cake; inserting the angle ring 401 along the bent notch 203 of the support bar 201; performing a first baking on the waterproof transformer coil; performing a first vacuum impregnation on the waterproof transformer coil; performing a second baking on the waterproof transformer coil; performing a second vacuum impregnation on the waterproof transformer coil; performing a third baking on the waterproof transformer coil; applying a hydrophobic coating on the surface of the waterproof transformer coil.

[0043] The above has described the embodiments of the present invention in detail with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

[0044] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0045] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A waterproof transformer coil structure, characterized in that, Comprising: An insulating cylinder for supporting a waterproof transformer coil; Spacers for winding with the waterproof transformer coil, the spacers being mounted on the insulating cylinder, the spacers being provided with strip-shaped notches, both ends of the spacers being respectively provided with bent notches facilitating hydrophobicity, the bent notches including an inclined portion facilitating drainage and a vertical portion, the inclined portion being connected to the vertical portion, and the vertical portion extending into the inner side of the waterproof transformer coil; Winding wires wound on the strip-shaped notches; Corner rings, the outer end surface of the corner rings being lower than the inner end surface of the corner rings, the corner rings being provided on the bent notches of the spacers.

2. The waterproof transformer coil structure according to claim 1, characterized in that, A plurality of the spacers are provided, and the spacers are evenly arranged on the outer wall of the insulating cylinder.

3. The waterproof transformer coil structure according to claim 1, characterized in that The strip-shaped notches are evenly arranged on the outer edge of the spacers.

4. The waterproof transformer coil structure according to claim 1, characterized in that, The winding wires include metal wire conductors, first polyimide films, first insulating papers, second insulating papers and second polyimide films, and the metal wire conductors, the first polyimide films, the first insulating papers, the second insulating papers and the second polyimide films are wrapped in sequence, and the winding wires are wound on the strip-shaped notches.

5. The waterproof transformer coil structure according to claim 1, characterized in that, An insulating ring is further included, and the insulating ring is provided on both end surfaces of the winding wires.

6. A manufacturing method of a waterproof transformer coil, characterized in that, Comprising: Processing an insulating material into a cylindrical structure to form an insulating cylinder; Processing an insulating material into spacers and processing strip-shaped notches in the middle of the spacers; Evenly arranging and fixing the spacers on the surface of the insulating cylinder; Winding the winding wires on the strip-shaped notches of the spacers to form a coil cake; Inserting insulating rings at the upper and lower end surfaces of the coil cake; Inserting corner rings along the bent notches of the spacers so that the inclined portion of the bent notches is connected to the vertical portion of the bent notches, wherein the vertical portion extends into the inner side of the waterproof transformer coil; Performing a first baking on the waterproof transformer coil; Performing a first vacuum impregnation on the waterproof transformer coil; Performing a second baking on the waterproof transformer coil; Performing a second vacuum impregnation on the waterproof transformer coil; Performing a third baking on the waterproof transformer coil; Applying a hydrophobic coating on the surface of the waterproof transformer coil.

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