JPH05282945A - Electric discharge electrode for lightning insulator device - Google Patents

Abstract

PURPOSE:To stabilize an electric characteristic of electric discharge electrodes in a mounted state by securely and speedily adjusting a fixing state of arcuate electric discharging portions of the electric discharging electrodes on an electrification side in a suitable state. CONSTITUTION:A fixing plate 27 is fused and fixed to the tip end of a supporting rod 24 constituting an electric discharge electrode 23 on an electrification side. A pair of parallel ring-like electrodes 28, 29 are connected to each other via spacers 30, 31. The spacers 30, 31 are connected to each other via a connecting plate 32. A through hole 32a and a slot 32b both formed on the connecting plate 32 correspond to through holes 27a, 27b formed on the fixing plate 27, to be tightened by bolts 33, 34 and nuts 35, 36. The electrodes 28, 29 are turned on the bolt 33 in the vertical direction for the purpose of adjustment so that fixing positions of arcuate electric discharging portions 28a, 29a can be adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention, when a lightning surge enters a line, discharges it immediately to the ground, and
The present invention relates to a discharge electrode of a lightning arrester device capable of preventing and preventing a ground fault accident by suppressing and interrupting a follow-up current based on an operating voltage generated thereafter.

[0002]

2. Description of the Related Art In a conventional lightning arrester device for a power transmission line, as shown in FIG. 6, a support insulator 6 is suspended from a support arm 1 of a steel tower, and a power transmission line 11 is supported under the support insulator 6.
Further, a discharge electrode 41 on the charging side is cantilevered on the lower end of the support insulator 6. As this discharge electrode, a round bar made of a conductive material is cut into a predetermined length, and the round bar is curved and formed in a ring shape and an arc shape.
Further, the arc-shaped discharge portion 41a of the discharge electrode 41 is provided with the lightning protection insulator 15
The discharge electrode 42 on the ground side, which is supported at the lower end of the, is opposed to the discharge electrode 42 with a predetermined air discharge gap G.

[0003]

However, in the conventional ring-shaped electrode 41, the grounding-side discharge electrode 42 on the side of the lightning arrestor and the arc-shaped discharge portion 41a of the ring-shaped portion which face each other with a predetermined air discharge gap G are provided. If the relative position is not as designed, it is meaningless to make the discharge portion 41a into an arc shape. Therefore, as an example, when the discharge portion 41a is mounted on a steel tower, the arc discharge portion 41a is used.
The center O ₁ of the arc is attached to the lower end of the discharge electrode 42 on the ground side to determine the relative position. However, when actually mounted, the dimensions of the insulator device, the machining error of the discharge electrode 41, or the lightning protection insulator 15
It is difficult to accurately align the center O ₁ position of the arc of the arc-shaped discharge part 41a with the lower end of the discharge electrode 42 on the ground side due to an error in the mounting state of the above. Therefore, when the supporting insulator 6 laterally swings in the line direction, it is necessary to take into consideration the change in the air discharge gap G caused by the above-described factors in advance, and therefore the arc-shaped discharge portion 41a becomes long. was there.

An object of the present invention is to solve the above problems existing in the prior art, to easily and quickly attach the discharge electrode on the charging side, and to easily assemble the arc-shaped discharge portion in a proper state. Another object of the present invention is to provide a discharge electrode in a lightning arrester device.

[0005]

In order to achieve the above object, the present invention supports a support insulator with respect to a support arm of a steel tower through a grounding side connecting metal fitting unit, and an end portion of the support insulator is provided with a power supply side. The power transmission line is supported through the connecting metal fitting unit, while the lightning protection insulator is mounted on the supporting arm side through the mounting adapter, and the discharge electrode on the power supplying side supported by the power supplying side connecting metal fitting unit and a predetermined In a lightning arrester device in which grounding side discharge electrodes facing each other with an air discharge gap are provided at the tip of a lightning arrester, a support rod in which the discharge side discharge electrode is cantilevered by a charge side connecting fitting unit, It is constituted by a ring-shaped electrode having an arc-shaped discharge part connected to the tip of the support rod, and the connecting part is provided with position adjusting means for adjusting the rotational position of the ring-shaped electrode.

[0006]

According to the present invention, the arc-shaped discharge portion is supported at the tip of the support rod so that its rotational position can be adjusted on the line connecting the swing center of the support insulator in the line direction and the discharge electrode on the ground side. After connecting the base end of the rod to the connecting side metal fitting unit, adjust the rotation so that the center position of the arc of the arc-shaped discharge part matches the discharge end of the discharge electrode on the ground side. By doing so, the discharge electrode can be surely attached at an appropriate position. Therefore, any part of the arc-shaped discharge part has a designed distance, the discharge characteristics are stable, and the length of the discharge part can be shortened.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment embodying the present invention will now be described with reference to FIG.
~ It demonstrates based on FIG. As shown in FIG. 2, a suspension metal fitting 2 is attached to a support arm 1 of a steel tower, and a suspension insulator is attached to the suspension metal fitting 2 via a grounding side connection metal fitting unit composed of a connection link 3, a horn mounting metal fitting 4, and the like. A suspension insulator series 6 as a support insulator formed by connecting a plurality of 5 in series is suspended and supported. Further, the power transmission line 11 is supported at the lower end portion of the suspension insulator string 6 via a power-supply-side connecting metal fitting unit including a socket clevis 7, a horn mounting metal fitting 8, a connecting link 9, an electric wire clamp 10, and the like. Further, the horn mounting brackets 4 and 8 support arc horns 12 and 13 on the grounding side and the charging side for preventing flashover from the surface.

On the other hand, a mounting adapter 14 is attached to the support arm 1.
The lightning protection insulator 15 is attached through the. The lightning protection insulator 15 includes a withstand voltage insulating cylinder (not shown), a resistance element 16 housed therein having a non-linear voltage-current characteristic, an insulating jacket 17 molded outside the withstand voltage insulating tower, Further, it is constituted by electrode fittings 18 and 19 on the ground side and the charging side. The discharge side electrode 20 on the ground side is supported by the electrode-side electrode fitting 19. In addition, the mounting adapter 14 and the electrode-side metal fitting 19 on the power-supply side support arc-rings 21 and 22 on the ground side and the power-supply side for preventing creeping flashovers on the surface. The discharge electrode 20 is oriented in the direction orthogonal to the line as shown in FIG. 3, and its arc is an arc centered on the upper hanging point O ₁ of the suspension insulator string 6.

A mounting plate 25 welded and fixed to the base end of the support rod 24 is brought into contact with one arm portion 8a of the horn mounting metal fitting 1 on the side of charging, and a through hole formed in the arm portion 8a and the mounting plate 25. The bolts 26 are inserted through (not shown) and are fixedly fastened to each other. Further, a mounting plate 27 is welded and fixed to the tip end portion of the support rod 24, and the mounting plate 27 has the structure shown in FIG.
A through hole 27a and a long hole 27b are formed as shown in FIG. A pair of ring-shaped electrodes 28 and 29, which are parallel to each other, are mounted on the mounting plate 27 so that the vertical position of the electrodes can be adjusted.

Spacers 30 and 31 made of a metal plate are welded and fixed between the pair of ring-shaped electrodes 28 and 29, and a connecting plate 32 is welded and fixed between the spacers, and a circular plate formed on the connecting plate 32 is formed. The through hole 32a and the long hole 32b are attached to the mounting plate 27.
The bolts 33, 34 and the nuts 35, 36 are fastened and fixed in a state corresponding to the through holes 27a, 27b formed in the above.

Next, the operation of the lightning arrester device constructed as described above will be described. Power transmission line 11
When a lightning surge current invades, the current is generated by the connecting link 9, the charging side horn mounting bracket 8, the mounting plate 25, the support rod 24, the mounting plate 27, the coupling plate 32, the spacers 30, 31 ,.
And the air gap G through the ring electrodes 28 and 29.
Is flashed over to the ground-side discharge electrode 20, then flows through the electrode-side metal fitting 19, the resistance element 16, the ground-side metal fitting 18, and the mounting adapter 14 to the support arm 1 and is discharged to the ground.

Further, the subsequent current generated thereafter is the resistance element 16
The resistance value is restored and the air discharge gap G suppresses and blocks the ground fault, thereby preventing a ground fault. By the way, in the above embodiment, the discharge electrode 23 on the charging side is connected to the support rod 2
4 and the mounting plate 27 provided at the tip thereof and the ring-shaped electrodes 28, 29 supported by the mounting plate 27 so as to be capable of vertically rotating, the bolts 33, 34 and the nut 35, In the state where 36 is loosened, the center O ₂ position of the arc T of the arc-shaped discharge parts 28a, 29a of both electrodes 28, 29 can be made to coincide with the discharge end of the ground-side discharge electrode 20.

As shown in FIG. 1, the discharge portions 28a and 29a are extended on a straight line L connecting the upper hanging point O ₁ of the suspension insulator string 6 and the discharge end O ₂ of the ground side discharge electrode 20. By locating the center of the arc direction, it is desirable to reduce the variation width of the air discharge gap G when the suspension insulator string 6 swings in the line direction.

The present invention is not limited to the above embodiment, but can be embodied as follows. (1) As shown in FIG. 4, only one through hole 32a is formed in the connecting plate 32, and one through hole 2 is also formed in the mounting plate 27.
7a is formed and is fixed by tightening the bolt 33 and the nut 35.

(2) As shown in FIG. 5, the mounting plate 27 is vertically connected to the tip of the support rod 24, and the mounting bolts 33 of the ring-shaped electrodes 28 and 29 are inserted into the elongated holes 27c. Both electrodes 28, 29 should be able to move vertically in parallel. In this case, the ring-shaped electrode 2
Since the vertical height positions of 8 and 29 can be adjusted, it becomes easy to adjust the length of the air discharge gap G to an appropriate length.

(3) Although not shown, the through hole of the bolt 26 of the mounting plate 25 connected to the base end portion of the support rod 24 is made into a vertically elongated hole so that the tilt position of the rod 24 can be adjusted in the vertically direction. To do.

[0017]

As described above in detail, according to the present invention, it is possible to surely and quickly adjust the mounting state of the arc-shaped discharge portion of the discharge electrode on the charging side to a proper state, and therefore, the discharge is performed in the mounted state. There is an effect that the electrical characteristics of the electrode can be stabilized.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a discharge electrode on a charging side embodying the present invention.

FIG. 2 is a front view showing the entire lightning protection insulator device embodying the present invention.

FIG. 3 is a side view showing a correspondence relationship between a lightning protection insulator and both discharge electrodes.

FIG. 4 is a perspective view of a main part showing another embodiment of the present invention.

FIG. 5 is a front view of a main part showing another embodiment of the present invention.

FIG. 6 is a front view showing the entire conventional lightning protection insulator device.

[Explanation of symbols]

1 support arm, 6 suspension insulator series as a support insulator, 1
1 power line, 14 mounting adapter, 15 lightning insulator, 1
6 resistance element, 20 ground side discharge electrode, 23 charging side discharge electrode, 24 support rod, 27 mounting plate, 27a,
27b hole, 28, 29 ring electrode, 28a, 29
a arc discharge part, 30, 31 spacer, 32 connecting plate, 32a hole, 32b elongated hole, 33, 34 bolt, 35, 36 nut, G air discharge gap, T arc discharge part arc, O ₂ arc shape The center of the discharge section.

Claims (1)

[Claims] 1. A support insulator for a support arm of a steel tower is supported via a grounding side connecting metal fitting unit, and an end portion of the supporting insulator supports a power transmission line via a power applying side connecting metal fitting unit.
On the other hand, a lightning protection insulator is attached to the support arm side through a mounting adapter, and a discharge electrode on the ground side that opposes the discharge electrode on the power supply side supported by the connecting metal fitting unit with a predetermined air discharge gap. In a lightning arrester device provided at the tip of a lightning insulator, a supporting rod in which the discharging electrode on the charging side is cantilevered by a connecting side metal fitting unit, and an arc-shaped discharge connected to the tip of the supporting rod. A discharge electrode for a lightning protection insulator device, comprising: a ring-shaped electrode having a portion; and a position adjusting means for adjusting a rotational position of the ring-shaped electrode provided at a connecting portion thereof.