JPH11224550A - Strain long rod insulator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a band metal fixture type stain log rod insulator device with high balance of dynamic current are inviting characteristics, critical flashover characteristics, economic performance and easy fixing work. SOLUTION: An arc horn of a long rod insulator 1 is constituted with a lightening resistant horn 6 having the specified Y-coordinate and an arc resistant horn 7 in the line side, but with a small gap horn 12 having zero Y-coordinate instead of the arc resistant horn and a main horn 13 with a bird injury preventing ring at the tip in the earth side. The arc horn on the earth side is made of an arc horn having a blow-off projection with zero Y-coordinate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long-strength insulator device having arc horns attached to caps at both ends of a long-stem insulator, and mainly relates to a tension device having a relatively short insulator length of 33 kV to 77 kV class. The present invention relates to a long trunk insulator device for use.

[0002]

2. Description of the Related Art There are two methods for mounting an arc horn on an insulator, a horn mounting bracket type in which an arc horn is mounted on a horn mounting bracket, and a band mounting type in which an arc horn is mounted on an insulator cap using a band metal fitting. FIG. 6 shows a conventional band-shaped, long-strength insulator device for tension, in which the long-side insulator 31 has a ground-side cap 32 and a line-side cap 33, a ring-shaped arc-resistant horn 34, and a rod-shaped end-point. A lightning-resistant horn 35 having a property is attached by a band fitting 36, respectively. This structure is the same as that of the horn mounting bracket-type tension-resistant long trunk insulator device using the horn mounting bracket 37 shown in FIG.

[0006] However, the conventional band-type long-strength insulator device of the tension type shown in FIG. 6 has the same structure as that of the conventional horn-mounting-type long-strength insulator device of the horn type shown in FIG. The present inventor felt that there was room for study on the arc inviting characteristics of the downstream arc, the critical confounding characteristics, economy, ease of installation work, and the like. In other words, it is doubtful as to whether the arc-resistant horn 34 provided near the band fitting 36 has an effect commensurate with the mounting cost and the number of installation works with respect to the arc-inducing characteristics of the downstream arc. Regarding the critical conduction characteristic, the long trunk insulator 31 is used in order to facilitate the inflow of the downstream arc.
The arc horn 34 with a small diameter provided close to the long trunk insulator 31 causes a creepage flash due to lightning,
It is possible that the critical confounding property is obstructed.

[0004]

SUMMARY OF THE INVENTION The present invention further improves the above-described conventional band-shaped, long-strength insulator device for tension, and improves the characteristics of inducing arc of a downstream arc, critical confounding characteristic, economic efficiency, and the like. The object of the present invention is to provide a band-shaped, long-strength insulator device for tension having excellent balance of ease of installation work and the like.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problem, a long-strength insulator device for tension according to the invention of claim 1 is provided.
In a long-strength insulator device for tension, in which arc horns are attached to caps at both ends of a long-stem insulator arranged substantially horizontally with respect to the ground, the arc horns on the line side are each a lightning-proof horn and an arc horn having a predetermined Y coordinate. The earth-side arc horn is composed of a small gap horn having a Y coordinate of zero as an alternative to the arc horn and a main horn with a bird harm prevention ring provided at the tip thereof. It is characterized in that it is.

A long-span insulator device for tensile strength according to a second aspect of the present invention is a long-span insulator device for tension, wherein arc horns are attached to caps at both ends of a long-stem insulator disposed substantially horizontally with respect to the ground. The arc horn on the side is composed of a lightning proof horn and an arc horn each having a predetermined Y coordinate, and the arc horn on the earth side is a projection for arc blowing having a zero Y coordinate instead of the arc horn. And a band-type arc horn having the following characteristics.

[0007]

Embodiments of the present invention will be described below. FIG. 1 is a front view showing an embodiment of the invention of claim 1 provided with a bird damage prevention function, wherein 1 is a long trunk insulator arranged substantially horizontally with respect to the ground, and 2 is a ground side cap of the long trunk insulator 1. ,
3 is a line side cap. The line-side arc horn is attached to the line-side cap 3 with a band fitting 5, and is composed of a lightning-resistant horn 6 and an arc-resistant horn 7. Each of the lightning resistant horn 6 and the arc resistant horn 7 has a predetermined Y coordinate. Here, the Y coordinate means the amount of projection of the horn in the axial direction of the long trunk insulator 1 (so-called horn cover) measured from the end face of the cap 3, and is shown as Y ₁ and Y _{2 in} FIG. .

On the other hand, there is no conventional ring-shaped arc horn on the ground side, and a small gap type bird harm prevention structure 10 is provided.
Is provided. The small gap type bird harm prevention structure 10 includes a small insulator 11 as shown in FIG. 2 and FIG. 3 on an enlarged scale, and small gap horns 12, 12 above and below the small insulator. The lower small gap horn 12 is a substitute for the arc-resistant horn, and is fixed to the earth side cap 2 by a band fitting 4. Thus, since the lower small gap horn 12 is integrated with the band fitting 4, the Y coordinate of the lower small gap horn 12 is zero.

Above the small insulator 11, a main horn 13 is provided. The main horn 13 is electrically connected to the small gap horn 12 on the upper side.
13 Y coordinate Y ₃ is the gap between small gap horns 12, 12, +35
mm or less. In this case, a small gap horn 12, a gap between the main horn 13 and the lightning horn 6 on the line side,
The value obtained by adding the intervals between 12 is set to be a predetermined horn interval. At the tip of the main horn 13, a bird harm prevention ring is provided to prevent the tip of the wing from coming into contact with the band 4 on the earth side even if the bird stopped on the lightning horn 6 on the line side spreads its wing. 14 are installed.

In the long stem insulator device for tension resistance according to the first aspect of the present invention, the conventionally used ring-shaped arc horn is omitted on the ground side, but the following arc after flashover is a band fitting. 4, the tip immediately moves to the tip of the small gap horn 12, discharges between the small gap horns 12, 12, and forms an arc with the lightning-resistant horn 6 on the line side. Therefore, the downstream arc after the flashover does not get caught on the surface of the long trunk insulator 1. In addition, according to the present invention, there is an advantage that the creepage distance between the earth side and the line side is increased by eliminating the lightning proof horn approaching the creepage of the long trunk insulator 1 as in the prior art, and the critical conduction characteristic can be improved.

Further, since the bird harm prevention ring 14 is provided at the tip of the main horn 13, it is possible to prevent a bird harm accident due to the tip of the bird's wing coming into direct contact with the earth side. In addition,
Even if the bird wing of the bird harm prevention bird contacts the ring 14, there is no danger of a flashover accident due to the small gap formed between the small gap horns 12,12.

FIGS. 4 and 5 are front views showing the second embodiment of the present invention. In the second aspect of the invention, similarly to the first aspect, the line-side arc horn includes a lightning-resistant horn 6 and an arc-resistant horn 7, and is attached to the line-side cap 3 by a band metal fitting 5. However, the arc horn on the ground side has a band fitting 5 provided with an arc blowing projection 8 having a zero Y coordinate as shown in FIG. The arc blowing projection 8 is a substitute for the conventional arc horn, and preferably has a length of 30 mm or more. The interval between the arc blowing projection 8 and the line-side lightning-resistant horn 6 is set to a predetermined horn interval.

In the long stem insulator for tension resistance according to the second aspect of the present invention, the ring-shaped arc horn conventionally used is omitted on the ground side, but the subsequent arc after the flashover is a band fitting. 5, the arc swiftly moves to the tip of the arc blowing projection 8, and forms an arc with the lightning-resistant horn 6 on the line side. Therefore, the downstream arc after the flashover does not get caught on the surface of the long trunk insulator 1. As described above, despite the simplification of the configuration of the long-span insulator for tension of the present invention, the conventional long-span insulator for tension as shown in FIG. There is no inferiority to the device.

[0014]

As described above, according to the present invention, it is possible to eliminate the ring-shaped arc horn from the earth-side arc horn without deteriorating the arc characteristic of the downstream arc. Simplification can reduce costs and facilitate installation work. In particular, according to the first aspect of the present invention, there is an advantage that a bird damage accident can be prevented, and a critical flashing characteristic can be enhanced by preventing a creeping flash of lightning.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the invention of claim 1;
(A) is a front view, (B) is a side view of only the ground side bracket,
(C) is a side view of only the metal fittings on the line side.

FIG. 2 is an enlarged front view of a main part of the invention of claim 1;

FIG. 3 is a side view of only a main part of the invention according to the first embodiment;

FIG. 4 is a front view showing an embodiment of the invention of claim 2;

5 is an enlarged view of a main part of the invention of claim 2, (A) is a front view, and (B) is a side view of only a metal fitting. FIG.

6A and 6B are views showing a conventional band-fitting long-strength insulator device for tension, where FIG. 6A is a front view and FIG. 6B is a side view of only a ground-side fitting.

7A and 7B are diagrams showing a conventional horn mounting bracket type long-strength insulator device for tension resistance, wherein FIG. 7A is a front view, FIG. 7B is a side view of only a ground-side bracket, and FIG. It is a side view of only the metal fittings.

[Explanation of symbols]

1 long trunk insulator, 2 earth side cap, 3 line side cap, 4 band metal fittings, 5 band metal fittings, 6 lightning resistant horn, 7 arc resistant horn, 8 projection for arc blowing with zero Y coordinate, 10 small gap type bird damage prevention Structure, 11 small insulators, 12 small gap horn, 13 main horn, 14
Bird harm prevention ring

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] February 10, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 2

[Correction method] Change

[Correction contents]

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Naruhito Matsui 3-6-9 Yoshida, Nagano City, Nagano Prefecture Chubu Electric Power Company Nagano Electric Power Center Co., Ltd. No. 56 Nihon Insulator Co., Ltd. (72) Mitsuharu Okamoto, Inventor No. 2-56 No. 56 Nihon Insulator Co., Ltd. (72) Inventor Ryuichi Mine, Ryuichi 2 Sudacho, Mizuho-ku, Nagoya, Aichi Prefecture No. 56 Inside Nihon Insulators Co., Ltd.

Claims (2)

[Claims] In a long-strength insulator device for tension, wherein arc horns are attached to caps at both ends of a long-stem insulator arranged substantially horizontally with respect to the ground, the arc horns on the line side each have a lightning proof having a predetermined Y coordinate. The arc horn on the earth side is a small gap horn with a zero Y coordinate instead of the arc horn, and a main horn with a bird harm prevention ring provided at its tip. A long-strength insulator device for tensile strength, comprising a horn and a horn. 2. A tension-resistant long trunk insulator device in which arc horns are attached to caps at both ends of a long trunk insulator arranged substantially horizontally with respect to the ground, wherein the arc horn on the line side has a predetermined Y coordinate. The arc horn on the earth side is a band-type arc horn having an arc blowing projection with a zero Y coordinate instead of the arc horn. Long-strength insulator device for tension.