JPH02186514A - Lighting guard insulator device for transmission line - Google Patents

Abstract

PURPOSE:To facilitate the adjustment of the aerial discharge clearance between the discharge electrode of the electro-mechanical side and the discharge electrode of the earth side in the desirable distance by providing an angle adjusting means of the discharge electrode to the discharge electrode of the electro-mechanical side. CONSTITUTION:A fitting bracket 21 is integrally formed in a wire pressing member 18, and a control plate 23 fixed at the tip of the discharge electrode 22 of the electro-mechanical side is fixed to the bracket 21 with a pair of bolt 24A, 24B and a nut 25. A round insertion hole 23a for inserting the bolt 24A and a circular long hole 23b for inserting the bolt 24B are formed in the control plate 23, and the discharge electrode 22 of the electro-mechanical side is fitted around of the bolt 24A possibly to adjust the tilt position in the vertical direction. Thereby, even if the catenary angle of the transmission line is changed, the fitting angle of the discharge electrode of the electro-mechanical side is adjusted to adjust easily the aerial discharge clearance between the discharge electrode of the electro-mechanical side and the discharge electrode of the earth side in the predetermined clearance.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is applicable to a power transmission line when an abnormally large current flows through a power transmission line due to a lightning strike.
The present invention relates to a lightning insulator device for power transmission lines that can quickly discharge lightning to the ground using a lightning protection function, suppress and interrupt follow-on current, and prevent permanent ground faults.

[Prior Art] As a conventional lightning arrester device for power transmission lines, the applicant has proposed the eighth
We are proposing something like the one shown in the figure. This device suspends a supporting flange link 6 from the support arm of a steel tower using an upper hanging bracket J1 so as to be able to rotate in the direction of the track and in the orthogonal direction. The power transmission line 14 is supported via the metal fitting J2 and the wire clamp 15, while the support arm 1 is attached to the lightning arrester 32 by the I adapter 31.
is attached to the wire clamp 15, and the lightning arrester 32 is attached to the wire clamp 15.
Discharge on the section side so that the discharge electrode 36 attached to the section side end faces each other with a predetermined air discharge gap G;
[Problems to be Solved by the Invention] The above-mentioned conventional lightning arrester device for power transmission lines is configured to support the wire clamp 15.
Since the discharge electrode 22 on the energized side is fixed for a distance of τI, if the transmission line 4 swings in the direction of the line, the discharge electrode 22
2 in the same direction in a gentle arc shape, which has the advantage that the air discharge gap G is kept substantially constant. However, since the discharge electrode 22 was fixed to the wire clamp 15, when a steel tower is installed on a slope in a mountainous area, the cathedral angle of the power transmission line 14 changes, and the power transmission line 14 and the wire clamp 15 When it is inclined as shown by the two-dot chain line in the figure, the discharge electrode 22 on the energizing side also deviates as shown by the two-dot chain line in the figure, and the aerial discharge gap G increases.
There was a problem that predetermined discharge characteristics could not be obtained.

In order to solve the above problem, it is necessary to replace the discharge electrode 22 on the power supply side with another pole of a different shape, which poses a problem in that the pole installation work is troublesome.

The object of the present invention is to maintain the y without replacing the discharge electrode even when the catena angle of the power transmission line changes. An object of the present invention is to provide a lightning arrester device for a power transmission line, which can easily adjust an air discharge gap between a power-side discharge electrode and a ground-side discharge electrode to a desired distance.

1. Means for Solving the Problems] In order to achieve the above object, the present invention provides an arrangement in which the support arm of the steel tower is connected to the support arm of the steel tower in the direction of the railway line and in the orthogonal direction l\
A support insulator is hung rotatably, and a power transmission line is supported at the lower end of the support insulator via a lower hanging bracket and a wire clamp, while a support arm or an upper hanging bracket is used. Attach the lightning arrester to the self-registered wire clamp, and attach the discharge electrode on the energized side to the grounding side discharge electrode attached to the energized end of the lightning arrester insulator so as to face each other with a predetermined air discharge gap. In the supported lightning arrester device for a power transmission line, a means for adjusting the angle of the discharge electrode is provided for the discharge electrode on the power supply side.

Further, it is preferable to provide the wire clamp with a balance weight that balances with the discharge electrode on the energizing side.

[Function] In this invention, since the angle adjustment means is attached to the discharge electrode on the power supply side, when the catena angle of the power transmission line changes, the mounting angle of the discharge electrode on the power supply side can be adjusted accordingly. Therefore, the aerial discharge gap between the discharge electrode on the critical side and the discharge electrode on the ground side can be easily adjusted to a desired distance.

Also, is there a balance weight installed on the wire clamp? -J, in addition to the above effect, no bending load acts on the wire clamp, so the power transmission line can be stably supported.

Embodiment] Hereinafter, an embodiment embodying the present invention will be described based on FIGS. 1 to 3.

A connecting fitting 2 is fixed to the tip of the support arm 1 of the steel tower, and a suspension plate 5 is connected in series to the connecting fitting 2 via a U clevis link 3 and a horn fitting 4 to serve as a supporting insulator. The insulator chain 6 is supported so as to be swingable in the direction of the line and in the orthogonal direction. In this embodiment, the connecting fitting 2, the U clevis rift 3, and the bone fitting 4 constitute an upper hanging fitting J1.

A connecting link 7 is rotatably connected to the lower end of the suspension insulator chain 6, and a horn mounting bracket 8 is rotatably connected to the lower end of the connecting link 7 by a connecting pin 9. Further, arc horns 10 and 11 are attached to the left arm portions of the upper and lower horn mounting brackets 4 and 8 to prevent burnout of the suspension hook 5 when the suspension wire of the suspension insulator chain 6 is entangled. There is.

111 A strap 12 is connected to the center part of the lower bone attachment fitting 8 by a connecting pin 13 so as to be rotatable in the line direction, and the lower ends of the straps 1 to 12 are provided with a strap 12 for supporting the power transmission line 1/1. A wire clamp 15 is connected by a connecting pin 16 so as to be rotatable in the line direction. The wire clamp 15 includes a clamp body 17, a wire suppressing member 18, and one bolt and nut 20 for tightening and fixing the wire pressing member 18 to the clamp body 17. As shown in FIG. 1, mounting brackets 1 to 21 are formed on the wire pressing member 18, and mounting brackets 1 to 21 are mounted on the wire pressing member 18.
1 has an adjustment plate 23 fixed to the proximal end of the electrode 22 for discharging the energized side by a pair of bolts 24A, 24B and a nut 25. The adjustment plate 23 has bolts 24.
The circular insertion hole 23a through which A is inserted, and the bolt 24B
An arc-shaped elongated hole 23b is formed through the hole 23b, and the discharge electrode 22 on the energizing side is attached so as to be able to adjust its tilting position in the vertical direction around the holes 1 to 24A. Further, brackets 1 to 26 are integrally formed on the upper surface of the wire suppressing member 18, and a balance weight 27 that balances the load of the discharge electrode 22 on the power supply side is supported by a mounting rod 28, and a bolt 24 and a nut 25 The tightening is fixed.

As shown in FIG. 2, an adapter 31 is fixed to the support arm 1, and a lightning insulator 32 is obliquely fixed to its tip.
Current-limiting element 3 whose main material is zinc oxide with non-linear current characteristics
4 is built-in, and is fixed with a bolt using an electrode fitting 33 on the ground side. Further, a discharge electrode 36 on the ground side is supported by the charging side electrode fitting 35 of the lightning arrester 32 so as to face the discharge electrode 22 on the charging side with a predetermined air discharge gap G therebetween. Furthermore, arc links 37 and 38 are provided on the mounting adapter 31 and the power-supplying side electrode fitting 35 to prevent burnout when the lightning arrester 32 is caught in the creepage line.
is installed.

Note that the ground side discharge K136 is formed in a gentle arc shape when viewed from the line direction, as shown in FIG.
4 swings in the direction perpendicular to the line (see arrow P), the air discharge gap G is maintained substantially constant.

Next, the operation of the lightning arrester device for power transmission lines constructed as described above will be explained.

Now, when an unexpectedly excessive current is applied to the power transmission line 14 due to a lightning strike, the current flows from the wire clamp 15, the mounting bracket 21, and the discharge electrode 22 on the energized side through the discharge gap G to the discharge electrode 36 on the ground side. The current is discharged from the electrode fitting 35 to the current limiting element 34 in the lightning arrester 32, and the electrode fitting 33
, flows through the mounting adapter 31 to the support arm 1, further flows to the steel tower, and is discharged to the ground. Subsequent currents that occur thereafter are suppressed and blocked by the current limiting element 34 and the discharge gap G.

Now, in the above embodiment, the discharge electrode 22 on the energizing side is connected to the adjustment plate 23 and the bolt 24A as tilt adjustment means.
24B is provided so that the angle can be adjusted in the vertical direction, so that when the cathedral angle of the power transmission line 14 changes as shown by the chain line in FIG. The tilt can be adjusted to the normal mounting position without changing the discharge gap G. As a result, the distance of the discharge gap G can be easily adjusted without replacing the discharge mold #122.

Note that this invention can also be embodied as follows.

(1) As shown in FIG. 4, a bolt insertion hole 21a and a long hole 21b are formed in the mounting bracket 21, and on the other hand,
Only bolt insertion holes 23a should be provided in the adjustment plate 23.

(2) As shown in FIG. 5, the mounting plate 41 on which the mounting bracket 21 is fixed by welding or the like is brought into contact with the wire pressing member 18, and the adjusting plate 23 of the discharge "dipole 22 on the energized side is adjusted. be configured to be installed.

In this case, the discharge electrode 22 can be easily attached to the existing wire clamp 15.

(3) As shown in FIG. 6, the main body 1 of the wire clamp 15
7, a mounting bracket l-21 is integrally formed in a protruding manner.

(4) As shown in No. 7 and 1, when the power transmission line 14 is a plurality of double conductors, the upper phase-adjacent wire clamps 1
Hairpin-shaped discharge electrode 2
A pair of adjusting plates 23 attached to the proximal ends of 2 are attached so as to be adjustable in angle.

[Effects of the Invention] As detailed above, the present invention allows the installation angle of the discharge electrode on the power supply side to be adjusted even when the cathedral angle of the power transmission line changes when the steel tower is installed in a mountainous area. 4, it is possible to easily adjust the air discharge gap between the discharge electrode on the energized side and the discharge electrode on the ground side to a predetermined gap.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing the mounting structure of a discharge @ pole embodying the present invention, Fig. 2 is a front view showing the entire lightning arrester device for power transmission lines, and Fig. 3 is a discharge on the energizing side and the grounding side. A right side view of the electrode, FIGS. 4 and 5 are perspective views of the main parts showing another embodiment of the present invention, FIG. 6 is a front view of the main parts showing another embodiment, and FIG. FIG. 8 is a perspective view showing a discharge electrode applied to a double conductor, and a front view showing a conventional lightning arrester device for power transmission lines. DESCRIPTION OF SYMBOLS 1... Support arm, 5... Suspension hook, 6... Suspension hook link as a support insulator, 14... Power transmission line, 15...
- Wire clamp, 16... Connecting pin, 17... Clamp body, 18... Wire pressing member, 19... To port 1, 21... Mounting bracket 1~. 22...Charging l11
1 discharge electrode, 23...adjustment plate, 23a...bolt insertion hole, 23b...long hole, 24A, 24B...bolt,
32...Lightning insulator, 36...Discharge electrode on the ground side, Jl
...Top hanging metal fitting, J2...Lower amount - T metal fitting, G
...Air discharge gap. Figure 7 UA *1Th=J"-YuM-MIJJ-'l1-i1
i - Announcement by the Commissioner of the Heisei Patent Office 1) Takeshi Moon, March 231, Title of invention: Person amending lightning arrester device for power transmission lines Relationship to the case: Patent applicant Address: 2-56 Korota-cho, Mizuho-ku, Nagoya City Name (Name) 406 Nippon Insulators Co., Ltd. Representative: Ohara Zandai Agent Address: 2 Hatazume-cho, Gifu City, 500 O'582 (65)-1810 (Substitution) All drawings

Claims (1)

[Scope of Claims] 1. A support insulator is suspended from the support arm of the tower by an upper hanging bracket so as to be rotatable in the direction of the railway line and in the orthogonal direction, and a lower hanging bracket is attached to the lower end of the support insulator. and a power transmission line is supported through a wire clamp, and a lightning arrester is attached using the support arm or the upper hanging metal fitting, and the lightning arrester is attached to the energized side end of the lightning arrester insulator to the wire clamp. In a lightning arrester device for a power transmission line in which a discharge electrode on a power supply side is supported so as to face a discharge electrode on a ground side and a discharge electrode on a power supply side so as to face each other with a predetermined air discharge gap, the angle of the discharge electrode with respect to the discharge electrode on the power supply side is adjusted. A lightning arrester device for a power transmission line, characterized in that it is provided with a means. 2. The lightning arrester device for a power transmission line according to claim 1, further comprising a balance weight positioned on the opposite side of the electric wire clamp from the discharge electrode to balance the load of the discharge electrode.