CN213519554U

CN213519554U - Novel transformer bushing

Info

Publication number: CN213519554U
Application number: CN202023031740.1U
Authority: CN
Inventors: 吴金龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-06-22
Anticipated expiration: 2030-12-16

Abstract

The utility model discloses a novel transformer bushing, including electrically conductive copper pole, be equipped with insulating overcoat in electrically conductive copper pole outside cover, insulating overcoat is made characterized by the epoxy material: an inner silica gel layer is fused and bonded between the outer edge of the cylindrical section of the conductive copper rod and the insulating sleeve, two ends of the insulating sleeve are respectively longer than the inner silica gel layer, and inner holes at two ends of the insulating sleeve are respectively wrapped on the outer edge of the conductive copper rod; an outer silica gel sleeve is fused and bonded at the lower end of the insulating sleeve at the outer edge of the conductive copper rod and is used for bonding the conductive copper rod and the insulating sleeve into a whole. The beneficial effects are that: no gap is generated between the insulating outer sleeve and the conductive copper rod through the inner silica gel layer, so that the oil leakage phenomenon is avoided; the expansion force of the expansion strength of the conductive copper rod on the insulating outer sleeve can be buffered, so that the cracking phenomenon of the sleeve is avoided; the conductive copper rod and the insulating outer sleeve are bonded into a whole through the outer silica gel sleeve, so that the epoxy body and the copper rod conductor can be prevented from loosening, and the tensile strength between the epoxy body and the copper rod conductor is increased.

Description

Novel transformer bushing

Technical Field

The utility model relates to a transformer accessory, in particular to novel transformer bushing.

Background

The transformer bushing is arranged at the upper end of the transformer box body and plays a role in conducting and insulating. The existing transformer bushing process is to combine the epoxy resin material with the copper bar conducting rod directly, and because the expansion coefficients of copper and the epoxy resin insulating layer are different, the epoxy resin insulating layer and the copper bar conducting rod are easy to generate gaps and leak oil in use, and even the resin insulating layer is cracked in severe cases, thereby causing power failure and production halt.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a can avoid the novel transformer bushing of oil leak or fracture is provided.

In order to solve the above problem, the utility model adopts the following technical scheme:

the utility model provides a novel transformer bushing, includes electrically conductive copper pole, is equipped with insulating overcoat in electrically conductive copper pole outside cover, and insulating overcoat is made by the epoxy material, and its special character is: an inner silica gel layer is fused and bonded between the outer edge of the cylindrical section of the conductive copper rod and the insulating sleeve, two ends of the insulating sleeve are respectively longer than the inner silica gel layer, and inner holes at two ends of the insulating sleeve are respectively wrapped on the outer edge of the conductive copper rod;

an outer silica gel sleeve is fused and bonded at the lower end of the insulating sleeve at the outer edge of the conductive copper rod and is used for bonding the conductive copper rod and the insulating sleeve into a whole.

Preferably, the cross section of the upper part of the conductive copper rod is a rectangle with round corners and is used for externally connecting a lead; the lower part of the conductive copper rod is cylindrical and is used for being inserted into the transformer box body.

Preferably, two ends of the insulating outer sleeve are respectively longer than the inner silica gel layer by 10-20mm so as to prevent the insulating outer sleeve and the conductive copper rod from relatively rotating.

Preferably, the wall thickness of the inner silica gel layer is 2-4 mm.

Preferably, the axial length of the outer silica gel sleeve is 10-20mm, and is equal to the outer diameter of the lower end of the insulating outer sleeve.

Preferably, an annular groove is provided below the annular boss of the insulating outer sleeve to facilitate installation of the seal ring and to prevent removal of the seal ring.

The utility model has the advantages that:

1. because the inner silica gel layer is fused and bonded between the outer edge of the cylindrical section of the conductive copper rod and the insulating sleeve, no gap is generated between the insulating sleeve and the conductive copper rod, and the oil leakage phenomenon is avoided; because silica gel is soft materials, under the asynchronous inflation condition of electrically conductive copper pole and resin insulation layer, can cushion the expanding force of electrically conductive copper pole expansion strength to insulating overcoat through interior silica gel layer to avoid the sleeve pipe fracture phenomenon.

2. Because the outer silica gel cover is fused and bonded at the lower end of the insulating outer sleeve at the outer edge of the conductive copper rod and is used for bonding the conductive copper rod and the insulating outer sleeve into a whole, the looseness of the epoxy body and the copper rod conductor can be prevented, and the tensile strength between the epoxy body and the copper rod conductor is increased.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: the conductive copper rod comprises a conductive copper rod 1, an outer silica gel sleeve 2, an insulating outer sleeve 3, an annular groove 4 and an inner silica gel layer 5.

Detailed Description

As shown in fig. 1, the utility model relates to a novel transformer bushing, which comprises a conductive copper rod 1, wherein the cross section of the upper part of the conductive copper rod 1 is rectangular with round corners for externally connecting a lead; the lower part of the conductive copper rod 1 is cylindrical and is used for being inserted into a transformer box body. An insulating outer sleeve 3 is sleeved outside the conductive copper rod 1, and the insulating outer sleeve 3 is made of epoxy resin materials so as to be conveniently installed at the upper end of the transformer box body. An inner silica gel layer 5 is fused and bonded between the outer edge of the cylindrical section of the conductive copper rod 1 and the insulating outer sleeve 3, the wall thickness of the inner silica gel layer 5 is 2-4 mm, two ends of the insulating outer sleeve 3 are respectively longer than the end face of the inner silica gel layer 5, and the size a of the longer part is 10-20 mm; inner holes at two ends of the insulating outer sleeve 3 are respectively wrapped on the outer edge of the conductive copper rod 1; so as to prevent the insulating outer sleeve 3 and the conductive copper rod 1 from rotating relatively.

An outer silica gel sleeve 2 is fused and bonded at the lower end of the insulating sleeve 3 at the outer edge of the conductive copper rod 1 and is used for bonding the conductive copper rod 1 and the insulating sleeve 3 into a whole. The axial length b of the outer silica gel sleeve 2 is 10-20mm and is equal to the outer diameter of the lower end of the insulating outer sleeve 3.

An annular groove 4 is arranged below the annular boss at the middle part of the outer edge of the insulating outer sleeve 3, so that the sealing ring can be conveniently installed and prevented from moving.

When in processing, the conductive copper rod 1 is firstly polished and then is molded at the outer edge of the lower part of the conductive copper rod 1 through mold injection molding to form an inner silica gel layer 5, so that the inner silica gel layer 5 is completely bonded with the conductive copper rod 1 without gaps; then, the surface of the inner silica gel layer 5 is polished and flame sprayed and baked, and then is molded by a mould to form the insulating outer sleeve 3; and finally, after polishing the lower ends of the conductive copper rod 1 and the insulating outer sleeve 3, forming an outer silica gel sleeve 2 by one-time injection molding, so that the conductive copper rod 1 and the insulating outer sleeve 3 are completely bonded into a whole through the outer silica gel sleeve 2 without gaps.

When in use, the inner silica gel layer 5 is fused and bonded between the outer edge of the cylindrical section of the conductive copper rod 1 and the insulating sleeve 3, so that no gap is generated between the insulating sleeve 3 and the conductive copper rod 1, and the oil leakage phenomenon is avoided; and the expansion force of the expansion strength of the conductive copper rod 1 to the insulating outer sleeve 3 can be buffered through the inner silica gel layer 5, so that the cracking phenomenon of the sleeve is avoided. Through outer silica gel cover 2 with electrically conductive copper pole 1 and 3 bonding integrations of insulating overcoat, can prevent that the epoxy body is not hard up with the copper pole conductor, increase the tensile strength between the epoxy body and the copper pole conductor.

While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.

Claims

1. The utility model provides a novel transformer bushing, includes electrically conductive copper pole, is equipped with insulating overcoat in electrically conductive copper pole outside cover, and insulating overcoat is made characterized by the epoxy material: an inner silica gel layer is fused and bonded between the outer edge of the cylindrical section of the conductive copper rod and the insulating sleeve, two ends of the insulating sleeve are respectively longer than the inner silica gel layer, and inner holes at two ends of the insulating sleeve are respectively wrapped on the outer edge of the conductive copper rod;

2. The novel transformer bushing of claim 1, wherein: the cross section of the upper part of the conductive copper rod is rectangular with a fillet and is used for externally connecting a lead; the lower part of the conductive copper rod is cylindrical and is used for being inserted into the transformer box body.

3. The novel transformer bushing of claim 1, wherein: two ends of the insulating outer sleeve are respectively longer than the inner silica gel layer by 10-20mm so as to prevent the insulating outer sleeve and the conductive copper rod from relatively rotating.

4. A novel transformer bushing according to claim 1 or 3, characterized in that: the wall thickness of the inner silica gel layer is 2-4 mm.

5. The novel transformer bushing of claim 4, wherein: the axial length of the outer silica gel sleeve is 10-20mm, and is equal to the outer diameter of the lower end of the insulating outer sleeve.

6. A novel transformer bushing according to claim 1 or 3, characterized in that: an annular groove is arranged below the annular boss of the insulating outer sleeve, so that the sealing ring can be conveniently installed and prevented from moving.