KR102004164B1 - Bush cover of a transformer for indirect hot-line work - Google Patents

Abstract

The present invention relates to a bushing cover of a transformer for an indirect live line which is arranged on a primary bushing terminal of a pole transformer. The bushing cover of a transformer for an indirect live line comprises a cover body unit arranged to enclose a busing terminal (21) including a clamp body unit (21a) on an upper end of an insulator (20), a neck unit (21b) protruding from the clamp body unit (21a), and a clamp (21c) arranged on an upper end of the neck unit (21b) to fix a cable (30). The cover body unit includes: a cover unit (110) to come in contact with a portion of an upper surface of an uppermost wing (20a) of the insulator (20); a first grip unit (120) extended upwards from the cover unit (110) to enclose the clamp body unit (21a); a second grip unit (130) extended from the first grip unit (120) to enclose the neck unit (21b); a clamp storage unit (140) extended from the second grip unit (130) to form a space in which the clamp (21c) is stored; and a cable insertion unit (150) arranged on an upper portion of the clamp storage unit (140) to guide insertion of the cable (30) fixed on the clamp (21c).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transformer bushing cover for an indirect live wire,

The present invention relates to a transformer bushing cover for an indirect live wire, and more particularly, to a bushing cover provided in a primary bushing terminal of a pillar transformer suitable for indirect live wire work.

The transformer receives AC power from the primary terminal (high voltage) and transforms the voltage and current by an electromagnetic induction action to generate secondary terminal (low voltage) Thereby supplying AC power of the same frequency.

Such a transformer includes a pillar transformer installed on the ground along the ground, and a ground transformer installed in the ground in the underground wiring system. The structure is slightly different depending on the particular application, but the basic configuration is the same.

In general, an insulation cover for protecting a primary bushing terminal provided on an upper portion of a transformer is provided. Such an insulation cover prevents corrosion of a terminal, which may be generated due to exposure of the bushing terminal to the outside, and adhesion of foreign matter, Prevent safety accidents.

FIG. 1 is a front view of a prior art bushing cover according to the prior art, and FIG. 2 is a view showing an example of a conventional bushing cover.

1 and 2, the prior art bushing cover 10 includes a first cover body portion 11 and a second cover body portion 12 having a substantially bilaterally symmetrical structure, The first cover body portion 11 and the second cover body portion 12 are connected to each other by a fastening portion 13 at the lower end of the substantially side portion of the first cover body portion 11 and the second cover body portion 12, folded, and the folded bushing cover is opened downward as a whole to wrap the bushing terminal.

The lower end of the cover body portions 11 and 12 is provided with an inwardly extending flange portion 14 so that the flange portion 14 is fixed to the upper end of the insulator 20 by wrapping the wing 20a, (10) is secured to the insulator (20) to protect the bushing terminal (21).

However, in this conventional technique, since the flange portion 14 of the cover body portions 11 and 12 is configured to wrap and fix the uppermost wing 20a of the insulator 20, the first cover body portion 11 and the second cover body 12, The bushing cover 10 can not be firmly fixed to the insulator 20 and cracks may be generated unless the two cover body parts 11 and 12 are assembled correctly during the assembling process of the part 12, There is a case in which a bird breaks the bushing terminal 21 and short-circuit and disconnection occur.

In particular, since the insulator of the primary bushing terminal uses various models such as a general-purpose magnetic insulator, a salt-proof magnetic insulator, a polymer insulator, and the like, the prior art bushing cover having the structure for wrapping the uppermost wing of the insulator can not be firmly fixed to the insulator, Is insufficient for the protection of

Registration Utility Model Bulletin No. 20-0301632 (Publication Date: Jan. 30, 2003)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a transformer bushing cover for an indirect live wire which is provided in a primary bushing terminal of a pillar transformer and can be firmly fixed regardless of the type of insulator.

It is another object of the present invention to provide a bushing cover having an assembling structure that can safely and conveniently perform an assembling operation of a bushing cover by using an indirect hot wire method.

In order to achieve the above object, a transformer bushing cover for an indirect live wire according to the present invention (hereinafter also abbreviated as "bushing cover") comprises a clamp body at the upper end of the insulator, a neck portion protruding from the clamp body, And a cover body provided to cover a bushing terminal made of a clamp which is provided on the upper surface of the insulator, wherein the cover body includes a cover portion contacting the upper surface portion of the uppermost blade of the insulator; A first grip portion extending upward from the cover portion to surround the clamp body portion; A second grip portion extending from the first grip portion and surrounding the neck portion; A clamp receiving part extending from the second grip part to form a space in which the clamp is received; And a cable inlet portion provided on the upper portion of the clamp receiving portion to guide a cable fixed to the clamp.

Preferably, the cover body portion is constituted by a first cover body portion and a second cover body portion which are connected by a hinge portion and are provided so as to be foldable in left and right directions.

More preferably, the first cover body portion and the second cover body portion each include a button projection and a fastening portion formed with an assembly hole corresponding to the button projection, and the button projection is press-fitted into the assembly hole.

More preferably, the fastening portion is a plate-like structure in which the first cover body portion and the second cover body portion are in surface contact with each other on the assembly surface, and a release groove formed at one side edge is formed.

Preferably, the second grip portion is formed with a guide surface on which the tip of the cable fixed to the clamp is located.

Preferably, a self-adhesive tape or adhesive silicone for airtightness is provided on the inner circumferential surface of the cable entry portion.

The transformer bushing cover for an indirect live wire according to the present invention is characterized in that the transformer bushing cover for a live wire according to the present invention comprises a cover portion provided to cover a part of an upper surface of an uppermost blade of an insulator, a first grip portion for fixing the clamping body portion of the bushing terminal, Since the cover body portion including the grip portion is provided, the bushing terminal can be firmly fixed to the insulator regardless of the insulator model, and the bushing terminal can be protected from foreign substances or rainwater.

The transformer bushing cover for an indirect live wire according to the present invention is constituted by a first cover body portion and a second cover body portion which are hinge-assembled, and has fastening means for fastening the two cover body portions so as to be assembled / disassembled by the indirect live- So that the assembly work of the bushing cover can be carried out safely and conveniently.

1 is a front view of a prior art bushing cover for a transformer,
2 is a view showing an example of the installation of a conventional bushing cover,
3 is a cross-sectional view of a bushing cover according to the present invention,
4 is a front view of the bushing cover according to the present invention in its deployed state,
5 is a plan view of a bushing cover according to the present invention,
6 and 7 are a perspective view and a bottom perspective view, respectively, of an expanded state of the bushing cover according to the present invention.

The specific structure or functional description presented in the embodiment of the present invention is merely illustrative for the purpose of illustrating an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention can be implemented in various forms. And should not be construed as limited to the embodiments described herein, but should be understood to include all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Meanwhile, in the present invention, the terms first and / or second etc. may be used to describe various components, but the components are not limited to the terms. The terms may be referred to as a second element only for the purpose of distinguishing one element from another, for example, to the extent that it does not depart from the scope of the invention in accordance with the concept of the present invention, Similarly, the second component may also be referred to as the first component.

Whenever an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but it should be understood that other elements may be present in between something to do. On the other hand, when it is mentioned that an element is "directly connected" or "directly contacted" to another element, it should be understood that there are no other elements in between. Other expressions for describing the relationship between components, such as "between" and "between" or "adjacent to" and "directly adjacent to" should also be interpreted.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. It will be further understood that the terms " comprises ", or "having ", and the like in the specification are intended to specify the presence of stated features, integers, But do not preclude the presence or addition of steps, operations, elements, parts, or combinations thereof.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

3 is a cross-sectional view of a bushing cover according to the present invention.

3, the bushing terminal 21 provided at the upper end of the insulator 20 has a cylindrical clamp body 21a, a neck portion 21b protruding from the clamp body portion 21a, And a clamp 21c provided at an upper end of the neck portion 21b to fix the cable 30 thereto.

The clamp body portion 21a has a disk shape and is provided at the upper end of the insulator 20 to fix and support the neck portion 21b. At this time, the neck portion 21b has a diameter smaller than the clamp body portion 21a, .

The bushing cover 100 includes a cover body integrally formed integrally with the bushing terminal to cover the bushing terminal. Specifically, the cover body is in contact with a part of the upper surface of the uppermost blade 20a of the insulator 20 A first grip portion 120 extending upward from the cover portion 110 to enclose the clamp body portion 21a and a neck portion 21b extending from the first grip portion 120, A clamp storage part 140 formed on the clamp storage part 140 to form a space for storing the clamp 21c and extending from the second grip part 130, And a cable lead-in part 150 for guiding the pulling of the cable 30 fixed to the lead wire 21c.

The cover portion 110 is provided to cover a part of the upper surface of the uppermost blade 20a of the insulator 20 and the cover portion 110 can directly contact the upper surface of the blade 20a, have. On the other hand, the cover 110 generally has the same curvature as that of the wings 20a of the insulator 20 so that it covers a part of the top surface of the wings 20a regardless of the type of the insulator, To prevent rainwater from entering the inside of the bushing cover.

The cover 110 may have a sharp inclination and an appropriate tension so that the cover 110 may be in close contact with the blade 20a regardless of the type of the insulator 120. The tension of the cover 110 may be greater than the thickness As shown in Fig.

The first grip portion 120 is provided so as to surround the clamp body portion 21a and the first grip portion 120 can be brought into close contact with the entire clamp body portion 21a or a part of the clamp body portion 21a As shown in Fig.

The second grip portion 130 extends upward from the first grip portion 120 to cover and fix the neck portion 21b and the inside diameter and the outside diameter of the first grip portion 120 are narrower than the first grip portion 120. [

The wire 31 of the cable 30 fixed to the clamp 21c positioned in the clamp housing part 140 is bent in the width direction of the cover body 21, The second grip portion 130 may be formed with an extended guide surface 131 so that the distal end of the wire 31 fixed to the clamp 21c can be positioned. .

The clamp receiving portion 140 extends upward from the second grip portion 130 and accommodates the clamp 21c. Preferably, the clamp receiving portion 140 is properly determined within a range capable of ensuring a sufficient distance from the inner side do. In general, the clamp receiving portion 140 has a larger inner diameter and an outer diameter than the second grip portion 130.

FIG. 4 is a front view of a bushing cover according to the present invention, and FIG. 5 is a plan view of a bushing cover according to the present invention.

4 and 5, the bushing cover 100 of the present embodiment includes a first cover body A and a second cover body B connected by a hinge 170 to be folded to the left and right, .

Preferably, the length of the hinge portion 170 is approximately the same as the height of the cover body portions A and B so that the first cover body portion A and the second cover body portion B can be rotated Assembly can be done on the correct assembly surface. The height of the hinge portion 170 is not necessarily the same as that of the cover body portions A and B and is preferably determined to be at least half of the height of the cover body portion even if the height is smaller than the height of the cover body portion.

The first cover body A and the second cover body B each have a button protrusion 162a and an assembly hole 161a corresponding to the button protrusion 162a so that the button protrusion 162a is inserted into the assembly hole 161a, 162a, 162a and 162a.

More specifically, the fastening portions 161 and 162 are plate-shaped structures that are in surface contact with each other on the assembly surface of the first cover body A and the second cover body B, A groove 163 is formed.

The button protrusion 162a is vertically protruded from the first coupling portion 161 so that the first cover body A and the second cover body B are folded together with the hinge portion 170 as a rotation axis, The button protrusion 162a is pressed into the assembly hole 161a and fixed between the two fastening portions 161 and 162. [

In particular, such a button-type assembly method can be indirectly operated by using a smart stick (also referred to as a 'hot stick' or a 'hot stick'), so that the assembly work of the bushing cover can be performed safely and conveniently. Also, when disassembling the assembled bushing cover, it is possible to separate the first cover body A and the second cover body B conveniently using the smart stick in the release groove 163.

Preferably, a self-adhesive tape 151 for airtightness is provided on the inner circumferential surface of the cable lead-in part 150, and insulation and waterproofing are performed by fusing a cable led into the bushing cover using a self-adhesive tape through an indirect live lead method. On the other hand, in addition to the self-adhesive tape, adhesive silicone may also be used as an airtight means.

6 and 7 are a perspective view and a bottom perspective view, respectively, of the bushing cover according to the present invention in its deployed state.

The first cover body A and the second cover body B each have a plurality of guide ribs 182a and 182b along the rim of the mounting surface and a plurality of guide ribs 182a and 182b corresponding to the guide ribs 182a and 182b A plurality of guide grooves 181a and 181b are formed to guide the guide ribs 182a and 182b in the assembling process of the first cover body A and the second cover body B, 181a and 181b so that the first cover body portion A and the second cover body portion B can be assembled with each other at an accurate assembly position.

The guide ribs 182a and 182b are composed of a first guide rib 182a protruding in the lateral direction of the cover body and a second guide rib 182b protruding in the longitudinal direction, 2 The cover body B can be assembled in the correct position without being distorted during the assembly process.

The first cover body A and the cover body B are provided with grip protrusions 191 and 192 which are respectively protruded perpendicularly from the outer circumferential surface of the first cover body A and the cover body B, It can be used as a means to grasp and secure the bushing terminal using a smart stick during hot live operation.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

20: insulator 21: bushing terminal
21a: clamp body part 21b: neck part
21c: Clamp 100: Bushing cover
110: cover part 120: first grip part
130: second grip part 140: clamp housing part
150: cable inlet portion 161, 162:
161a: Assembly hole 162a: Button projection
170: hinge portions 181a, 181b: guide groove
182a, 182b: guide ribs

Claims (6)

A transformer bushing cover for an indirect live wire, comprising: a clamp body at an upper end of an insulator; a neck portion protruding from the clamp body; and a cover body provided to cover a bushing terminal provided at an upper end of the neck portion and configured to clamp the cable ,
The cover body portion
A cover portion provided so as to be in contact with a part of an upper surface of the uppermost blade of the insulator;
A first grip portion extending upward from the cover portion to surround the clamp body portion;
A second grip portion extending from the first grip portion and surrounding the neck portion;
A clamp receiving part extending from the second grip part to form a space in which the clamp is received;
And a cable inlet portion provided on the upper portion of the clamp receiving portion to guide the cable to be fixed to the clamp,
The cover body portion
The first cover body portion and the second cover body portion being formed by a button protrusion and an assembling hole corresponding to the button protrusion, respectively, the first cover body portion and the second cover body portion being connected by a hinge portion, And a fastening part formed by pressing the button protrusion into the assembling hole, the fastening part being a plate-like structure in which the first cover body and the second cover body are in surface contact with each other on the assembly surface of the first cover body and the second cover body, And a releasing groove formed therein. delete delete delete The transformer bushing cover according to claim 1, wherein the second grip portion is formed with a guide surface on which the tip of the cable fixed to the clamp is located. The transformer bushing cover for an indirect live wire according to claim 1, wherein a self-adhesive tape or an adhesive silicone for airtightness is provided on an inner circumferential surface of the cable lead-in part.

Images