JPH01302616A - V-suspension type lightning protecting insulator device for overhead powder transmission line - Google Patents

Abstract

PURPOSE:To prevent the deformation of a discharge electrode and the breakage of a lightning protecting insulator and suspension insulator strings when a power transmission line is swayed to the perpendicular direction to the transmission line by the wind pressure or the like by curvedly forming the discharge electrode on the charging side so as to detour the suspension insulator strings on the lightning protecting insulator side with a base end section, an intermediate section and a discharge section. CONSTITUTION:A discharge electrode 10 on the charging side is supported on one side of a connecting yoke 6, it is constituted of a base end section 10a fixed by a nut through the connecting yoke 6 and extended in parallel with a power transmission line 9, an intermediate section 10b folded in the perpendicular direction to the transmission line from the base end section 10a, and a discharge section 10c folded nearly in parallel with the transmission line direction from the intermediate section 10b. When the power transmission line 9 is swayed outward to the perpendicular direction to the transmission line from the stationary position by the wind pressure or the like and a suspension insulator string 4 on the outside is bent, the collision between the discharge electrode 10 on the charging side and the suspension insulator string 4 is avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a V-hanging type lightning arrester device for overhead power transmission lines.

[Prior art] Conventional air transport'! ! ■As a hanging type lightning arrester device for J& line.

There is one disclosed in Japanese Unexamined Patent Publication No. 168305/1983. This lightning arrester device connects a pair of left and right long trunk support insulators to the support arms of a steel tower in a V-shape, and sends a wire via a connecting link and an electric wire clamp 1 to a connecting yoke that connects the lower ends of both long trunk support insulators. A wire is supported, and a discharge electrode on the side of the section is cantilevered on the connecting yoke in a direction perpendicular to the line direction, while a lightning arrester is suspended and fixed to the tip of the support arm via a mounting adapter. Further, at the lower end of the lightning arrester, an insulated discharge electrode was supported, which faced the discharge electrode on the energized side with a predetermined air discharge gap.

[Problems to be Solved by the Invention] The above-mentioned conventional lightning arrester device has a pair of long trunk support insulators mounted in a V-shape, so even if the power transmission line swings due to wind pressure etc., the long trunk support insulators will not disturb the line. direction, but not in the direction perpendicular to the line, and the air discharge gap between the two discharge electrodes does not change significantly. Therefore, the stable column shape of the M lightning insulator is maintained. be done.

However, when a suspension insulator chain consisting of a large number of suspension insulators connected in series is used instead of the long support insulator, when the power transmission line swings outward in the direction perpendicular to the line due to wind pressure, etc., the suspension insulators also swing in the same direction. As it oscillates, the suspension insulator chain on the lightning arrester side bends, and the discharge electrode on the energized side supported by the connection yoke collides with the discharge electrode on the insulated side supported by the lightning arrester, deforming both discharge electrodes. There was a problem in which the suspension insulators hit the lightning arrester and both glasses were damaged.

The purpose of the present invention is to prevent the suspension insulator chain from colliding with the charging side discharge electrode provided on the connection yoke or the insulating side discharge electrode attached to the lightning arrester even if the suspension insulator chain is bent. An overhead power transmission line that can prevent collisions between the discharge electrodes on the energized side and the lightning arrester insulators, and prevent deformation of the discharge electrodes and damage to the M lightning insulators and suspension insulators. The purpose of the present invention is to provide a hanging type lightning arrester device for use.

[Means for Solving the Problem] In order to achieve the above object, the present invention provides the support arm with the following features:
A pair of suspended insulator chains are attached via hanging fittings so as to be able to swing in the track direction and in a substantially V-shape, and a connecting yoke that connects the lower ends of both suspended insulator chains is equipped with a wire clamp. The power transmission line is supported, and the tip of the support arm supports an M lightning insulator laterally via an attached γ adapter, and the connection yoke has a cable extending in the same direction as the line and bent in a direction perpendicular to the line. The discharge electrode on the energized side is supported [7, and the discharge electrode on the insulating side is attached to the lightning arrester so that it extends downward and has a component in the line direction, and a predetermined line is attached between the two discharge electrodes. The method is to provide an air discharge gap.

[Function] The present invention prevents the transmission line from swinging outward in the direction perpendicular to the line due to wind pressure or the like, and even if the suspension insulator chain located on the outside is bent and the discharge electrode on the energizing side is lifted up together with the connecting yoke. ,
There is no collision between the discharge electrode on the energized side and the suspended insulator chain.
In addition, the discharge electrode on the energized side does not collide with the discharge electrode and the lightning arrester on the insulating side, and the suspension insulator chain does not collide with the lightning arrester, so there is no possibility of deformation of the discharge electrode, suspension insulator chain, or lightning arrester. damage is suppressed.

[Example] An example embodying the present invention will be described below with reference to the drawings.

As shown in Fig. 2, a pair of left and right hanging fittings 2, 2 are fixed to the support arm 1 of the steel tower with bolts, and a rain gauge lower fitting 2 is fixed to the support arm 1 of the steel tower.
．． 2 are connected to suspension insulator chains 4, 4, which are formed by connecting a plurality of suspension insulators in series, via upper connection fittings 3. ．．
A connecting yoke 6 having an inverted triangular plate shape is connected via a connecting pin 5, and a pair of left and right suspension insulator chains 4, 4 are mounted in a substantially V-shaped hanging configuration. A power transmission line 9 is supported at the lower end of the connection yoke 6 via a connection link 7 and a wire clamp 8.

A discharge electrode 10 on the power supply side is supported on one side of the connection yoke 6. As shown in FIG. 1, this discharge electrode 10 penetrates the connecting yoke 6 and is fixed by a bolt.
and a base end portion 10a extending parallel to the power transmission line 9, and an intermediate portion 10b bent from the base end portion 10a in a direction perpendicular to the line.
and a discharge portion 10c bent from the intermediate portion 10b so as to be substantially parallel to the line direction.

Incidentally, arc horns 11 and 12 are supported on the upper connecting fitting 3 and the lower connecting fitting 5, respectively, to prevent creeping flash of the suspended insulator chain 4.4.

A mounting adapter 13 is supported toward the front (right side in FIG. 2) at the tip of the support arm 1.
As shown in FIG. 1, a ground-side electrode fitting 15 provided at the base end of the lightning arrester 14 is fixed to the vertical surface of 3 with bolts. This lightning arrester 14 includes a voltage-resistant insulating cylinder (as shown) formed into a cylindrical shape of FRP or the like, and is housed inside the voltage-resistant insulating cylinder, and is made of zinc oxide, which has non-linear voltage-current characteristics, as its main material. element (as shown), and electrode fittings 15 on the grounding side and on the charging side that are fitted and fixed to both ends of the voltage-resistant insulating tube.
．． 16, and an insulating jacket 17 that is rubber-molded on the outside of the voltage-resistant insulating cylinder.

The electrode fitting 16 on the energizing side supports an insulating side discharge electrode 18 that faces the aforementioned energizing side discharge electrode 10 with a predetermined air discharge gap G therebetween.

As shown in FIG. 2, this discharge electrode 18 includes a vertical portion 18a extending vertically downward, a horizontal portion 18b extending from the vertical portion 18a in a direction parallel to the line direction, and a discharge side on the energized side. It is formed by an arcuate discharge portion 18c formed in an arc shape centered on the base end attachment portion 0 of the electric wire #110.

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

Now, when a surge current due to a lightning strike flows through the power transmission line, the current flows through the wire clamp 8, the connecting link 7, the connecting yoke 6, and the discharge electrode 10 on the energized side, and then flashes over to the discharge electrode 18 on the insulating side. Electrode fitting 16. The electric current is discharged to the steel tower via the current limiting element (as shown), the electrode fitting 15, the mounting adapter 13, and the support arm 1. The follow-on current that occurs thereafter is suppressed and interrupted by the current limiting element and the air discharge gap G, thereby preventing a ground fault from occurring.

Now, in the embodiment of the present invention, as shown in FIG. 1, the discharge electrode 10 on the energizing side has a base end portion 10a extending from the connecting yoke 6 in the line direction, and an intermediate portion 10b bent at right angles from the base end portion 10a. Furthermore, the discharge section 10c that curves in the line direction from the intermediate section 10b is curved so as to bypass the nine-slope insulator chain 4 on the lightning arrester 14 side, so that the power transmission line 9 is caused by wind pressure or the like in FIG. When the outer suspension insulator chain 4 swings outward in the direction perpendicular to the track as shown in FIG. 3 from the rest position shown in FIG. is avoided.

Since the vertical portion 18a of each of the insulating side discharge parts [i18] is displaced in the line direction from the energized side discharge electrode 10, the two electric currents 18 do not collide.
Since the lightning arrester 14 is held horizontally at approximately the same height as the tip of the support arm 1, the discharge electrode 10 on the energized side
Also, the outer suspension insulator chain 4 does not collide with the lightning arrester 14, and deformation of the poles 10 and 18 or damage to the suspension insulator chain 4 and the lightning arrester 14 are prevented.

Further, in the above embodiment, an arc-shaped discharge portion 18c is provided at the tip of the discharge electrode 18 on the insulated side, and when the power transmission line 9 swings in the line direction, the curvature of the arc-shaped discharge portion 18c is changed to Discharge part 1
Since the arc shape is set to be approximately the same as the arc drawn by the tip of 0c, when the power transmission line 9 swings in the line direction, the air discharge gap G is maintained approximately constant, and the discharge characteristics are stabilized.

Note that the present invention can also be embodied as follows.

As shown in FIG. 4, the discharge electrode 10 on the energizing side is formed into an arc shape when viewed from the top, or a balance weight 23 is provided on the opposite side of the connection yoke 6 to balance the discharge electrode 10 in terms of weight. However, the structure may be changed and embodied as desired within the scope of the claims of the present invention.

[Effects of the Invention] As detailed above, the present invention prevents the discharge electrode on the power-supplying side from colliding with the suspension insulator chain when the power transmission line swings in a direction perpendicular to the line due to wind pressure, etc. Avoiding collisions between the electrode and the discharge electrode and lightning arrester on the insulated side, as well as collisions between the suspension insulator chain and the discharge electrode and lightning arrester on the insulated side, to avoid deformation of the re-discharge electrode and damage to the suspension insulator chain or the lightning arrester. This has the effect of preventing this and improving durability and reliability.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the hanging type M lightning insulator device for power transmission lines according to the present invention. A plan view of the electrode and lightning arrester, Figure 2 is a front view of the power transmission line at rest, Figure 3 is a front view of the power transmission line swinging outward in the direction of the track, and Figure 4 is a front view of the main line. FIG. 7 is a plan view of main parts showing another embodiment of the invention. DESCRIPTION OF SYMBOLS 1...Support arm, 2...Hanging metal fitting, 4...Suspension insulator chain, 6...Connection yoke, 8...Wire clamp,
9... Power transmission line, 10... Power charging side discharge electrode, 13...
...Mounting adapter, 14...Lightning protection glass, 18...Insulated side discharge electrode, G...Air discharge gap. Patent Applicant B Hon Insulator Co., Ltd. Asahi Malleable Iron Co., Ltd. Agent Patent Attorney Hironobu Onda 1st Criminal 1st D

Claims (1)

[Claims] 1. A pair of suspended insulator chains (4) are attached to the support arm (1) via hanging fittings (2) so as to be swingable in the track direction and in a substantially V-shape, and both suspended insulator chains ( 4) A connecting yoke (6) connecting the lower end supports a power transmission line via a wire clamp (8), and a lightning arrester is attached to the tip of the support arm (1) via a mounting adapter (13). (14) is supported laterally, the connecting yoke (6) supports a discharge electrode (10) on the energized side that extends in the same direction as the line direction and is bent in a direction perpendicular to the line, and further supports the lightning arrester (10). (14) is attached with an insulating side discharge electrode (18) so as to extend downward and have a component in the line direction, and both of the discharge electrodes (1
A V-hanging type lightning arrester device, characterized in that a predetermined aerial discharge gap (G) is provided between 0 and 18).