Composite insulation capacitive transformer bushing

Abstract

The utility model discloses a composite insulation capacitance type transformer bushing which comprises a capacitor core body, a silicon rubber outer sleeve, an adhesive and room temperature silicon rubber, and the silicon rubber outer sleeve is formed by combining a silicon rubber bushing and a silicon rubber umbrella cover; the silicone rubber sleeve is tightly held on the capacitor core body, and an adhesive is smeared between the silicone rubber sleeve and the capacitor core body; the silicone rubber umbrella cover is tightly held on the silicone rubber sleeve, and the silicone rubber sleeve is located between the silicone rubber umbrella cover and the capacitor core body; the joint of the silicone rubber jacket and the sleeve flange is filled with room-temperature silicone rubber. According to the utility model, no glue-lacking seam exists, the problem that the core body is affected with damp due to the glue-lacking seam at the direct bonding position between the umbrellas is solved, and the structure still has the advantages that the core body diameter tolerance is high, the corresponding number of umbrellas can be set according to the dry arc creepage distance, the operation is simple, and the cost is low.

Description

Technical Field

[0001] The utility model relates to a composite insulating capacitor transformer bushing, belonging to the technical field of electrical bushing matching equipment. Background Art

[0002] At present, the silicone rubber sheds of composite insulation transformer bushings used in power systems are mainly high-temperature liquid vulcanized silicone rubber sheds on the core surface and silicone rubber sheds directly bonded to the core surface. High-temperature liquid vulcanized silicone rubber sheds have high requirements and need to be vulcanized and formed at 90-130°C. According to the diameter of the core and the height of the dry arc creepage distance, corresponding molds need to be configured, which has high production costs and inflexible design. The silicone rubber sheds are directly bonded to the core surface. The silicone rubber sheds are molded umbrellas, which are covered on the core surface in the order of umbrella size through adhesives. This method does not require high temperature, molds, etc. The core diameter tolerance is high, and the corresponding number of umbrellas can be set according to the dry arc creepage distance. The operation is simple and the cost is low, but this method has certain risks. The umbrellas are bonded with adhesives. Due to differences in personal operation, it is inevitable that there will be glue shortage and seams, which will cause the core to be damp and cause bushing accidents. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a composite insulating transformer bushing for the defects of the prior art, so as to solve the problems that the bonding place between the large umbrella and the small umbrella is prone to lack of glue and cracking, causing the core to be damp and the production cost is too high.

[0004] In order to solve this technical problem, the utility model provides a composite insulating capacitor transformer bushing, comprising a capacitor core, a silicone rubber jacket, an adhesive and room temperature silicone rubber, wherein the silicone rubber jacket is composed of a silicone rubber sleeve and a silicone rubber umbrella sleeve; the silicone rubber sleeve is tightly embraced on the capacitor core, and the adhesive is applied between the silicone rubber sleeve and the capacitor core; the silicone rubber umbrella sleeve is tightly embraced on the silicone rubber sleeve, and the silicone rubber sleeve is located between the silicone rubber umbrella sleeve and the capacitor core; the intersection of the silicone rubber jacket and the sleeve flange is filled with room temperature silicone rubber.

[0005] The silicone rubber outer sleeve is an integrated structure, and the silicone rubber umbrella cover and the silicone rubber sleeve are formed in one step.

[0006] The silicone rubber outer sleeve is a split structure, the silicone rubber umbrella cover is tightly held on the silicone rubber sleeve, and adhesive is applied between the silicone rubber umbrella cover and the silicone rubber sleeve.

[0007] The umbrella diameter of the silicone rubber umbrella cover is a large and small umbrella structure, and the large and small umbrellas are arranged at intervals.

[0008] The capacitor core is a rubber-impregnated paper capacitor core or a glass fiber reinforced plastic capacitor core.

[0009] The capacitor core is formed by winding power insulating crepe paper and aluminum foil on a conductor and curing the conductor through vacuum impregnation with epoxy resin.

[0010] The silicone rubber jacket is made of solid silicone rubber or liquid silicone rubber.

[0011] The silicone rubber outer sleeve adopts a heat shrinkable sleeve or a cold shrinkable sleeve.

[0012] The room temperature silicone rubber is applied to the metal flange and the root of the silicone rubber umbrella sleeve.

[0013] Beneficial effects: The utility model solves the problem of the core getting damp due to lack of glue and cracks at the direct bonding points between umbrellas. The molded silicone rubber jacket bonded to the surface of the core is an integral structure and there are no lack of glue seams. The umbrella bonding method still has a high tolerance for core diameter and can set the corresponding number of umbrellas according to the dry arc creepage distance. It has the advantages of simple operation and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0015] Figure 2 For this utility model Figure 1 An enlarged schematic diagram of part I in FIG.

[0016] Figure 3 This is a schematic diagram of the structure of a large umbrella with a silicone rubber umbrella cover of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of a small umbrella with a silicone rubber umbrella cover of the utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the silicone rubber sleeve of the utility model;

[0019] Figure 6 This is a schematic diagram of the structure of the second embodiment of the present utility model;

[0020] Figure 7 For this utility model Figure 6 An enlarged schematic diagram of Part II in FIG.

[0021] In the figure: 1. capacitor core; 2. silicone rubber sleeve; 3. silicone rubber umbrella cover; 4. adhesive; 5. room temperature silicone rubber; 6. silicone rubber jacket. DETAILED DESCRIPTION

[0022] The utility model is described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] like Figure 1-Figure 7As shown, the utility model provides a composite insulating capacitor transformer bushing, comprising a capacitor core 1, a silicone rubber jacket 6, an adhesive 4 and a room temperature silicone rubber 5, wherein the silicone rubber jacket 6 is composed of a silicone rubber sleeve 2 and a silicone rubber umbrella sleeve 3; the silicone rubber sleeve 2 is tightly embraced on the capacitor core 1, and the adhesive 4 is applied between the silicone rubber sleeve 2 and the capacitor core 1; the silicone rubber umbrella sleeve 3 is tightly embraced on the silicone rubber sleeve 2, and the silicone rubber sleeve 2 is located between the silicone rubber umbrella sleeve 3 and the capacitor core 1, playing a role of moisture-proof and core protection; the intersection of the silicone rubber jacket 6 and the sleeve flange is filled with room temperature silicone rubber 5.

[0024] The silicone rubber jacket 6 is an integrated structure, and the silicone rubber umbrella cover 3 and the silicone rubber sleeve 2 are formed in one step (such as Figure 6 and Figure 7 shown).

[0025] The silicone rubber jacket 6 can also be a split assembly structure, the silicone rubber umbrella cover 3 is tightly held on the silicone rubber sleeve 2, and an adhesive 4 (such as Figure 1 and Figure 2 shown).

[0026] The umbrella diameter of the silicone rubber umbrella cover 3 is a large and small umbrella structure (such as Figure 3 and Figure 4 As shown), large and small umbrellas are arranged alternately.

[0027] The capacitor core 1 is a rubber-impregnated paper capacitor core or a glass fiber reinforced plastic capacitor core.

[0028] The capacitor core 1 is made of electrical insulating corrugated paper and aluminum foil wound on a conductor according to a preset program size, and is cured by vacuum impregnation with epoxy resin.

[0029] The silicone rubber jacket 6 is made of solid silicone rubber or liquid silicone rubber.

[0030] The silicone rubber jacket 6 is a heat shrinkable sleeve or a cold shrinkable sleeve.

[0031] The room temperature silicone rubber 5 is applied to the metal flange and the silicone rubber umbrella cover 3 .

[0032] The utility model solves the problem that the core is damp due to the lack of glue and the cracks at the direct bonding between the umbrellas. The silicone rubber outer sleeve can be formed at one time, or it can be composed of an integral rubber sleeve and a silicone rubber umbrella sleeve in a split manner. The molded silicone rubber sleeve bonded to the surface of the core is an integral structure, and there is no lack of glue joint. When in use, the umbrella sleeve within a suitable range is selected according to the core diameter, and the appropriate length can be cut (selected) according to the height of the core. The umbrella bonding method still has a high tolerance for the core diameter, and the corresponding number of umbrellas can be set according to the dry arc creepage distance. It has the advantages of simple operation and low cost.

[0033] The above embodiments of the present invention are merely illustrative and not exclusive, and all modifications within the scope of the present invention or equivalent to the scope of the present invention are encompassed by the present invention.

Claims

1. A composite insulation capacitor transformer bushing, characterized in that: The invention comprises a capacitor core (1), a silicone rubber jacket (6), an adhesive (4) and room temperature silicone rubber (5); the silicone rubber jacket (6) is composed of a silicone rubber sleeve (2) and a silicone rubber umbrella sleeve (3); the silicone rubber sleeve (2) is tightly held on the capacitor core (1), and the adhesive (4) is applied between the silicone rubber sleeve (2) and the capacitor core (1); the silicone rubber umbrella sleeve (3) is tightly held on the silicone rubber sleeve (2), and the silicone rubber sleeve (2) is located between the silicone rubber umbrella sleeve (3) and the capacitor core (1); and the intersection between the silicone rubber jacket (6) and the sleeve flange is filled with room temperature silicone rubber (5).

2. The composite insulated capacitor transformer bushing according to claim 1, characterized in that: The silicone rubber outer sleeve (6) is an integrated structure, and the silicone rubber umbrella cover (3) and the silicone rubber sleeve (2) are formed in one step.

3. The composite insulation capacitor transformer bushing according to claim 1, characterized in that: The silicone rubber outer sleeve (6) is a split structure, the silicone rubber umbrella sleeve (3) is tightly held on the silicone rubber sleeve (2), and an adhesive (4) is applied between the silicone rubber umbrella sleeve (3) and the silicone rubber sleeve (2).

4. The composite insulation capacitor transformer bushing according to claim 1, characterized in that: The silicone rubber umbrella cover (3) has an umbrella diameter of a large and a small umbrella structure, and the large and small umbrellas are arranged at intervals.

5. The composite insulation capacitor transformer bushing according to claim 1, characterized in that: The capacitor core (1) is a glue-impregnated paper capacitor core or a glass fiber reinforced plastic capacitor core.

6. The composite insulation capacitor transformer bushing according to claim 1, characterized in that: The capacitor core (1) is formed by winding power insulating corrugated paper and aluminum foil on a conductor and curing the conductor through vacuum impregnation with epoxy resin.

7. The composite insulated capacitor transformer bushing according to claim 1, characterized in that: The silicone rubber jacket (6) is made of solid silicone rubber or liquid silicone rubber.

8. The composite insulation capacitor transformer bushing according to claim 1, characterized in that: The silicone rubber outer sleeve (6) is a heat shrinkable sleeve or a cold shrinkable sleeve.

9. The composite insulated capacitor transformer bushing according to any one of claims 1 to 8, characterized in that: The room temperature silicone rubber (5) is applied to the metal flange and the root of the silicone rubber umbrella cover (3).

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