JPH02117018A - Lightning-resisting horn insulator device - Google Patents

Abstract

PURPOSE:To make it possible to install a lightning protection insulator in a short time by installing the lightning protection insulator at an intermediate part of a holding arm protrusively in the extending direction of a the tensionproof insulator, almost horizontally, through a bracket. CONSTITUTION:At the intermediate part of a holding arm 1, a lightning insulator 10 is installed extending in the extending direction of a tensionproof insulator 5 almost in the horizontal direction through a fixing metal 11. While a discharge electrode 26 at the voltage applying side is held to the wire side linking metal 6, a discharge electrode 27 at the earthing side is held to the tip of the lightning insulator 10, and the both electrodes 26 and 27 are opposed placing a specific discharge gap G in the air. As a result, the insulating interval between the two phases can be secured sufficiently and the device is adaptable easily to a tensionproof type insulating device already established. At the same time, the installing work of the lightning insulator to the holding arm can be carried out simply and in a short time at the intermediate part of the holding arm.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is intended to quickly ground the abnormally high voltage caused by lightning when it is applied to a power transmission line, and to transmit it by the follow-on arc that occurs afterwards. The present invention relates to a lightning horn insulator device for overhead power transmission lines to prevent electric wires from melting, especially using IIT tension lead.

[Prior Art] This type of conventional lightning horn insulator device includes, for example,
JP-A-61-296609 or JP-A-62
A configuration shown in Japanese Patent No. 5520 is known.

In the former lightning-resistant horn silicate device, the i! 4-stripe insulators are connected, and electric wires are installed on the tension insulators via electric wire-side connecting fittings, and electric wires are installed on the tower-side connecting fittings via mounting fittings so as to be located above the tension-resistant insulators. The lightning arrester is attached in a cantilevered manner, and the charging side discharge electrode is supported upward by the wire-side connecting fitting, and the grounding side discharge electrode is supported at the tip of the lightning arrester, and both discharge electrodes are opposed to each other with a predetermined air discharge gap.

In addition, in the latter lightning horn insulator device, the tension insulator is connected to the tip of the support arm of the tower body via the tower body@connection fitting, and the tension insulator is connected to the tension insulator via the electric wire side connection fitting. An electric wire is installed, and a lightning arrester is attached to the tip of the support arm via a mounting bracket so as to extend almost horizontally in a direction perpendicular to the line, and the lightning arrester is attached to the power-supply side to the electric wire side connecting bracket. A ground-side discharge electrode is supported at the tip of the lightning arrester, and a re-discharge electrode is opposed to the lightning arrester with a predetermined air discharge gap therebetween.

[Problem to be solved by the invention] However, in the former conventional device, there is no lightning protection! 37 is placed almost horizontally above the tension-resistant insulator, so in steel towers with short arm spacing, it is not possible to secure a sufficient insulation gap between the upper phases, and the existing tension-resistant hook device cannot be used. The problem was that it was difficult to apply.

In addition, in the latter conventional device, the lightning arrester is mounted so as to protrude outward from the tip of the support arm. Therefore, when attaching and fixing the lightning arrester to the support arm on the tower body, The installation work must be carried out while supporting the weight of the lightning arrester, and although it is not affected by the length of the arm overhang, there is a problem in that the work is very complicated and time-consuming.

This invention was made by focusing on the problems that exist in the conventional technology, and its purpose is to ensure a sufficient insulation gap between the upper phases even if the arm spacing is short. This is a lightning horn that can be easily applied to existing tension-resistant insulator devices, and also allows the lightning arrester to be attached to the support arm easily and quickly in the middle of the support arm. Our objective is to provide insulator devices.

[Means for Solving the Problems] In order to achieve the above object, in the lightning horn-like secondary device of the present invention, a tension insulator is connected to the tip of the support arm of the tower body via a tower body side connecting fitting. At the same time, an electric wire is installed on the tension insulator via an electric wire side connecting fitting, and a mounting fitting is installed in the middle part of the support arm so as to extend substantially horizontally in the direction in which the tension insulator is extended. Attach the lightning arrester to the line side connecting fitting, and support the discharge electrode on the energized side to the connecting fitting on the line side, support the discharge electrode on the ground side to the tip of the lightning arrester, and place the re-discharge electrode in a predetermined atmosphere. They are opposed to each other with a discharge gap.

[Function] In the lightning horn-like secondary device configured as described above, the lightning arrester is attached to the intermediate portion of the support arm so as to extend substantially horizontally in the direction in which the tension insulator extends. Therefore, the lightning arrester is not placed close to the tension insulator of the upper phase, and a sufficient insulation interval between the upper phases can be ensured. In addition, since the lightning arrester can be installed in the middle of the support arm, unlike the configuration in which the N lightning insulator is attached to the outside of the tip of the support arm, the installation work of the lightning arrester can be facilitated. can.

[Example] Hereinafter, an example of a lightning-resistant horn insulator device embodying the present invention will be described in detail based on the drawings.

As shown in FIG. 1, a mounting plate 2 is attached to the support arm 1 of the tower body.
is fixed with bolt 3. Tension insulators 5 are connected and supported at both left and right ends of the mounting plate 2 via tower side connecting fittings 4, and electric wires II are connected to the energized side end of each tension insulator 5.
A power transmission line 7 is installed and supported via a II connection fitting 6. Arcing horns 8.9 are provided on the connecting fittings 4.6 on the tower body side and the electric wire side so as to face each other.

Although not shown, jumper wires are connected and fixed at both ends of the both-type line-side connecting fittings 6.
It extends in an arc shape with a gap t;

A lightning arrester 10 is attached to the intermediate portion of the support arm 1 via a mounting bracket 11 so as to extend substantially horizontally in parallel with one of the tension insulators 5.

As shown in FIG. 2 and FIG. 3, the mounting bracket 11 has a pair of upper and lower parts each having a roughly L-shaped cross section and fixed to each other by a plurality of bolts 12 and nuts 13 while holding the support arm 1 therebetween. plates 14, 15 and a support plate 1 fixed on the ball mounting plate 14 by a pair of bolts 16 and nuts 17;
8, and the above-mentioned 'i' is attached to the bent end portion of the support plate 18.
! I lightning insulator 1° is fixed by a pair of bolts 19.

An arc-shaped elongated hole 20 is formed on the support plate 18 at a portion through which the bolt 16 is inserted, and the support plate 18 can be rotated with respect to the ball mounting plate 14 within the range of this elongated hole 20. This allows the arrangement position of the lightning arrester 10 to be adjusted.

The lightning arrester 10 also includes a voltage-resistant insulating cylinder (as shown) formed in a cylindrical shape from a tensile material such as FRP, and a voltage-resistant insulating cylinder (as shown) made of zinc oxide (ZnO) as a main material housed in series therein. A current-limiting element with non-linear current characteristics (as shown), cap-shaped electrode fittings 21 and 22 on the grounding side and the charging side that are fitted and fixed to both ends of the voltage-resistant insulating cylinder, and the voltage-resistant insulating cylinder. It is composed of molded rubber 23 provided on the outer periphery.

Arcing rings 24 and 25 are provided on the @yu metal fittings 21 and 22 of the lightning arrester 10 to face each other, and the molded rubber 23
Damage caused by creeping flash is reduced.

As shown in FIG. 1, a pole 26 is attached to the electric wire side connecting fitting 6 of one of the tension insulators 5 for discharging on the energized side. Further, a discharge electrode 27 on the ground side is attached to the side electrode fitting 22 at the tip of the lightning arrester 10. The discharge electrodes 26 and 27 on the energizing side and the grounding side are arranged to face each other with a predetermined aerial discharge gap G, and the support plate 18
By adjusting the rotation of the lightning arrester 10 within the range of the upper elongated hole 20, the gap length of this aerial discharge gap G can be set arbitrarily.

A discharge portion 27a is attached to the tip of the discharge electrode 27 in the vertical direction (direction substantially perpendicular to the plane of the paper in FIG. 1), so that even if the tension insulator 5 swings in the vertical direction, the discharge gap G is approximately It is kept constant. In addition, the discharge electrode 26
The tip of the discharge portion 27a is projected toward the steel tower side,
Even if the tension insulator 5 swings in the horizontal direction, the discharge gap G is maintained substantially constant.

Next, the operation of the lightning horn insulator device constructed as described above will be explained.

Now, in this lightning protection horn insulator device, when a surge current caused by a lightning strike is applied to the power transmission line 7, the current is discharged in the air discharge gap G between the surface discharge electrodes 26 and 27, and is built into the lightning protection insulator 10. The current flows through the current limiting element and the fitting 11 into the support arm 1 of the tower body, and is discharged from the tower body to the ground. In addition, the following current generated after that is caused by the discharge electrode 26
．． 27 and the current limiting element in the lightning arrester 10.

By the way, in the lightning-resistant pawn cutter arrangement 5 of this embodiment, the lightning arrester 10 is attached to the tension-resistant insulator 5 at the intermediate portion of the support arm 1.
Since the lightning arrester 10 is installed so as to extend substantially horizontally in the direction in which the lightning arrester 10 extends, unlike the conventional configuration in which the lightning arrester 10 is disposed substantially horizontally above the tension insulator, the lightning arrester 10 is attached to the upper phase. It is not placed close to the '31i13 insulator 5, etc., so it is possible to ensure a sufficient insulation gap between the upper phases, and it can be easily applied to existing tension-resistant insulator devices. .

Furthermore, in the device of this embodiment, the installation work of the lightning arrester 10 can be carried out at the intermediate portion of the support arm 1, which is different from the conventional structure in which the lightning arrester is attached so as to protrude outward from the tip of the support arm. In contrast, the installation work of the lightning arrester 10 can be carried out easily and in a short time without requiring the complicated work of installing the lightning arrester while supporting the heavy rest of the lightning arrester on the outside of the tip of the support arm.

“Effect of the invention” Since this invention is configured as explained above,
Sufficient insulation spacing between the upper phases can be ensured, making it easy to apply to existing tension type insulators, and the installation work of the lightning arrester to the support arm can be carried out at the middle part of the support arm. It has excellent effects in that it can be done easily and in a short time.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a lightning protection horn insulator device embodying the present invention, Fig. 2 is a partial plan view showing an enlarged mounting component of the lightning protection insulator, and Fig. 3 is taken along line A-A in Fig. 2. FIG. 1...Support arm, 4...Tower body side connection fitting, 5...
・Tension insulator, 6... Electric wire IPI connection fitting, 7... Power transmission line, 10... Lightning arrester, 11... Mounting metal fitting, 26
...Discharge electrode on the energized side, 27゛...Discharge electrode on the grounding side, G...Air discharge gap.

Claims (1)

[Claims] 1. A tension insulator (5) is connected to the tip of the support arm (1) of the tower body via a tower body side connection fitting (4), and a wire side connection fitting (6) is connected to the tension insulator (5). ), and an electric wire (7) is installed in the middle part of the support arm (1).
The lightning arrester (10) is attached via the mounting bracket (11) so as to extend substantially horizontally in the direction of extension of the tension insulator (5), and the electrical wire side connecting bracket (6) is connected to the charging side. Discharge electrode (
26), and the ground side discharge electrode (27) is supported at the tip of the lightning arrester (10).
A lightning-resistant horn insulator device, characterized in that: 6, 27) are opposed to each other with a predetermined air discharge gap (G).