JPS5852970Y2 - Insulating cover for insulators - Google Patents

Description

[Detailed description of the invention] This invention is an insulating cover for an insulator that is used to cover the upper part of an electric wire support insulator, which has an arcing horn arranged around an upper metal fitting that supports overhead electric wires such as distribution lines. It is related to.

Conventionally, as shown in FIG. 1, this type of insulation cover for an insulator has an upper metal fitting 1 that supports an overhead electric wire 10 such as a distribution line.
For a wire support insulator 3 having an arcing horn 2 around it, an insulating cover 4' is used to cover the upper part of the wire support insulator 3 including the arcing horn 2.
is known, and according to this insulating cover 4',
Conductor exposed portion 11 in the upper part of the insulator 3. Conductor grip fitting 12
．． Since exposed conductive parts such as the upper metal fitting 1 and the arcing horn 2 can be covered all at once, the risk of electric shock for electrical workers etc. is eliminated, and in this sense electrical safety can be maintained. It is possible.

However, the insulating cover 4' of the type shown in FIG. 4' or may nest within the insulating cover 4', which may cause a ground fault on the line.

The purpose of this invention is to provide an insulating cover for insulators that does not impede the behavior of arching horns and prevents wild birds from entering or nesting inside the insulating cover. It is.

Next, this invention will be explained in detail using illustrated examples.

FIGS. 2 and 3 show the usage state of the insulating cover of one embodiment of this invention, in which an arcing horn 2 is attached to the upper metal fitting 1 of the insulator 3, and the top of the upper metal fitting 1 is attached to the insulator 3. A conductor exposed portion 11 of an overhead insulated wire 10 such as a power distribution line is fixedly supported by the conductor gripping fitting 12 .

The insulating cover 4 of this invention has an upper portion of the insulator 3, that is, a conductor exposed portion 11. Insulated wire 10 nearby
．． Conductor gripping fitting 12. It is formed to cover the upper part of the insulator 3 including the upper metal fitting 1 and the arcing horn 2, and the outer surface 6 of the insulator 3 and the outer surface 6 of the insulator 3 are insulated on the circumferential surface of the inner wall 5 near the bottom of the insulating cover 4. A thin polyethylene partition member 9 having a thickness of about 2 to 3 mm and having a large number of slit-like cut grooves 8 extends substantially in the diametrical direction of the insulator 3 so as to close the gap between the cover 4 and the inner wall 5. They are provided in a series so as to protrude.

In addition, when implementing this invention, the mounting position of the partition member 9 in the vertical direction is set as shown in the illustrated embodiment.
Without positioning it lower than arching horn 2,
As shown by the two-dot chain line in FIG. 2, the arcing horn 2 may be set at a position above the arcing horn 2, and the width B of the slit-like partition groove 8 and the outer surface 6 of the insulator 3 or the upper metal fitting 1 may be set as a partition member made of an insulating material. It is preferable that the gap H with respect to 9 is approximately 10 mm or less in order to prevent birds such as sparrows from entering.

According to this invention, the circumferential surface of the inner wall 5 near the opening bottom of the insulating cover 4 is made of insulating material with a large number of slit-shaped grooves 8 that can close the gap between the inner wall 5 and the outer surface 6 of the insulator 3. Since the partition member 9 is provided, even if the partition member 9 is installed at a lower position than the arcing horn 2, the arc emitted from the arcing horn 2 can be directed through the many slit-like cutting grooves 8. It can be sprayed to the outside without any trouble through the insulating cover 4, and it can reliably prevent birds etc. from entering into the insulating cover 4, thus preventing wild birds etc. from entering or nesting inside the insulating cover 4. This has the effect of reliably preventing the occurrence of line ground faults caused by ground faults.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional side view showing how a conventional insulator insulating cover is used, Fig. 2 is a longitudinal sectional side view showing how an insulator insulating cover according to an embodiment of this invention is used, and Fig. 3 is Fig. 2. A-
It is an A-line sectional view. In the figure, 1 is the upper metal fitting, 2 is the arcing horn, and 3
is an electric wire support fitting, 4 is an insulation cover for the insulator, 5 is an inner wall, 8 is
9 is a slit-like cut groove, and 9 is a partition member made of an insulating material.

Claims (1)

[Scope of utility model registration request] Arching horn 2 arranged around the upper metal fitting 1
In the insulator insulator cover 4 which covers the upper part of the wire support insulator 3 including An insulating cover for an insulator, characterized in that 9 projects in the diametrical direction of the insulator 3.