JPH05159653A - Lightning arrestor device - Google Patents

Abstract

PURPOSE:To provide a lightning arrestor device having no possibility of causing a position shift in a support body for supporting a jumper wire, and capable of regulating the height of a support body and ensuring a determined aerial discharge gap with the electrode of a lightning insulator. CONSTITUTION:In a lightning arrestor device having a jumper wire 18 which is connected between the end parts of a pair of strain insulator devices supported by the support arm 1 of a steel tower, and a lightning insulator 11 having a discharge electrode 17 which is supported by the support arm 1, a pair of fixed cramps 22 mounted on both ends of a lengthy support body 20 are installed to the jumper wire 18, and the support body 20 has a discharge electrode 31 for forming a determined aerial discharge gap G with the discharge electrode 17 of the lightning insulator 11. By changing the mounting position of the fixed cramps 22, the height regulation of the support body 20 and thus the regulation of the aerial discharge gap G between both electrodes 17, 31 can be performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention quickly discharges an abnormally high voltage caused by a lightning strike to a power transmission line and prevents a ground fault of the power transmission line due to a subsequent arc that occurs thereafter. The present invention relates to a lightning protection device.

[0002]

2. Description of the Related Art Generally, in a transmission line tension insulator device, a jumper wire is connected between the ends of a pair of tension insulators to maintain the air insulation between the power transmission line and the tower support arm. ing. In order to support the jumper wire and maintain an air insulation gap, a support pipe of a predetermined length is hung from a tension insulator, and the jumper wire is inserted and supported in the support pipe.

[0003]

However, since the jumper wire is apt to sway due to wind pressure, the support pipe is displaced along the jumper wire. Therefore, there is a problem that the air insulation gap between the jumper wire and the steel tower support arm cannot be properly maintained. Further, since the jumper wire can be inserted into the support pipe and can only slide in the length direction, there is a problem that the height of the support pipe cannot be adjusted. It is to be noted that there is no known device having the above-mentioned construction in which the lightning insulator is incorporated in the tension insulator device.

The present invention has been made by paying attention to the above-mentioned conventional problems, and an object thereof is to adjust the height of a support body without causing a positional deviation in the support body which supports the jumper wire. Another object of the present invention is to provide a lightning arrester capable of ensuring a predetermined air discharge gap with the electrodes of the lightning protection insulator.

[0005]

In order to achieve the above object, according to the present invention, a jumper wire is connected between the ends of a pair of tension insulator devices supported by a support arm of a steel tower, and the support arm is connected to the support arm. In a lightning arrester supporting a lightning arrester having a discharge electrode, the jumper wire is equipped with a pair of clamps attached to both ends of a long support,
The gist is a lightning arrester in which a discharge electrode that forms a predetermined air discharge gap between the support and the discharge electrode of the lightning protection insulator is provided.

[0006]

With the pair of clamps attached to both ends of the elongated support, the jumper wire is positioned and fixed to the jumper wire. At the same time, a predetermined air discharge gap is formed between the discharge electrode provided on the support and the discharge electrode of the lightning arrestor. Further, the height of the support can be adjusted by changing the mounting position of the clamp, and the air discharge gap between the discharge electrode provided on the support and the discharge electrode of the lightning arrester is set to a desired interval. It

[0007]

【Example】

(First Embodiment) An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a mounting plate 2 is fixed to a support arm 1 of a steel tower, and a pair of mounting brackets 4 are connected to the left and right ends of the mounting plate 2 via U clevis 3. .. A tension insulator 5 is attached to the mounting member 4, and the other end of the tension insulator 5 has a mounting member 6 and a connecting link 7.
The power transmission line 8 is supported via. The arc horns 9 and 10 are attached to the both fittings 4 and 6 so as to face each other. The U clevis 3, the mounting brackets 4, 6, the connecting link 7, and the arc horns 9, 10 constitute a tension insulator device.

On the other hand, as shown in FIG. 2, the lightning protection insulator 11 is suspended from the mounting plate 2 via a mounting adapter 12. This lightning protection insulator 11 has a non-linear resistance element 13
And the electrode fitting 14 is attached to the lower part. Arcing rings 15 and 16 are attached to the upper and lower positions of the lightning protection insulator 11 so as to correspond to each other.
An arc-shaped discharge electrode 17 is supported on the electrode fitting 14.

As shown in FIG. 1, a jumper wire 18 is provided between the connecting links 7 and a jumper wire clamp 1 is provided.
It is erected by 9 and is connected to the power transmission line 8 at both ends thereof. A support plate 20 as an elongated support is attached and fixed to the jumper wire 18 by fixing clamps 22 at both ends thereof via connecting plates 21. Support plate 2
Reference numeral 0 is composed of first and second support plates 20a and 20b on both ends and a third support plate 20c between them.

A pair of upper and lower engaging holes (not shown) are provided through the inner ends of the first and second support plates 20a and 20b, and a pair of upper and lower engaging holes are provided at both ends of the third support plate 20c. Stop hole 2
3 are transparently provided at a plurality of places at predetermined intervals. Then, the locking holes of the first and second support plates 20a and 20b and the locking hole 23 at any position of the third support plate 20c are tightened and fixed with bolts 24 in a state of being matched with each other. At the same time that the plates 20a, 20b, 20c are connected, the length of the entire support plate 20 is adjusted.

As shown in FIGS. 3A and 3B, the fixed clamp 22 has a fitting portion 25 formed in a curved shape,
The fitting plate 25 is pressed against the fitting part 25, and the pair of connecting plates 21 is rotatably supported by the fitting part 25. The contact plate 27 has the jumper wire 18 fitted therein, and the nut 26a is screwed onto the male screw portion 26b hanging from the fitting portion 25.
8 is fixed to the fitting portion 25. Connection plate 2
A pair of holes 29 are transparently provided in the lower part of 1, and the ends of the first and second support plates 20a and 20b are connected to the connecting plate 21 by screwing and tightening bolts 30 into the holes 29. In addition, as shown in FIGS. 1 and 2, the lower end portion of the inverted U-shaped discharge electrode 31 is fixed to the central position of the third support plate 20c, and the upper end portion and the discharge electrode 17 of the lightning protection insulator 11 are connected to each other. A predetermined distance between the electrodes, that is, an air discharge gap G is secured between the two.

Next, the operation of this embodiment will be described. As shown in FIG. 3, both fixing clamps 22 are covered from above the jumper wires 18, and their fitting portions 25 are attached.
The jumper wire 18 is fitted to. Then, the contact plate 27 is applied to the lower part of the jumper wire 18 and the nut 26a is loosely tightened. On the other hand, as shown in FIG. 1, the first and second support plates 20a and 20b and the third support plate 20c are provided with locking holes 2 of each support plate 20 so that the entire support plate 20 has a required length.
3 are put together and fixed to each other with bolts 24. The entire length of the support plate 20 is preset so that the discharge gap G between the discharge electrode 31 attached to the support plate 20 and the discharge electrode 17 attached to the lightning protection insulator 11 has a desired value. It Next, the outer ends of the first and second support plates 20a and 20b are connected and fixed to the connection plate 21 of the fixed clamp 22 with bolts.

In this state, the contact plate 27 is further tightened by the nut 26a to securely fix the jumper wire 18 to the fitting portion 25. When the support plate 20 is supported by the jumper wire 18 in this way, the support plate 20 is reliably supported by the jumper wire 18 without displacement. At the same time, the discharge gap G between the electrodes 17 and 31 is arranged according to a predetermined value. When changing the discharge gap G, the nut 26a is loosened to loosen the tightening of the contact plate 27, and then the bolt 24 connecting the first and second support plates 20a and 20b and the third support plate 20c is loosened and pulled out. The bolt 24 is inserted into another locking hole 23 and the nut is tightened. By doing so, the entire length of the support plate 20 is changed, and the height of the support plate 20 is changed. After that, the support plate 20 is supported again by the jumper wire 18 by fixing the contact plate 27 again with the nut 26a, and the discharge gap G is changed.

When an abnormally high voltage caused by a lightning strike is applied to the transmission line 8, the current at this time is the jumper line 1.
8 and is discharged in the discharge gap G properly held between the electrodes 17 and 31. This current is 1
It flows to the support arm 1 of the steel tower through the non-linear resistance element 13 built in 1. The subsequent arc generated thereafter is interrupted by the discharge gap G and the non-linear resistance element 13.

Thus, in this embodiment, the support plate 20
Is reliably fixed to the jumper wire 18 by the fixed clamps 22 attached to both ends thereof, there is no possibility that the support plate 20 is displaced with respect to the jumper wire 18. Moreover, since the support plate 20 is divided into a plurality of parts, the length thereof can be adjusted, the discharge gap G can be changed, and a predetermined interval can be secured. In addition, lightning protection insulator 1
Since the first discharge electrode 17 is formed in an arc shape, the discharge electrode 31 attached to the support plate 20 swings along the arc even if the support plate 20 shakes by the wind. An appropriate value is maintained for the distance between them. Further, the lightning arrester of this embodiment can be easily applied to the existing jumper wire. (Second Embodiment) Next, another embodiment of the present invention will be described with reference to FIGS. It should be noted that in the following description, the configuration unique to this embodiment will be described.

This embodiment is basically the same as the first embodiment, but in the fixed clamp 22, the connecting plate 21 rotatably supported downward is omitted, and the low connecting base 21a is provided. It is attached upwards. Further, the support plate 20 is a single plate which is not divided and is arranged above the jumper wire 18. The discharge electrode 31 has an arc shape, not an inverted U shape.

In this embodiment, since the support plate 20 is not formed separately, its length is determined in advance and both ends thereof are attached to the connecting base 21a of the fixed clamp 22. Therefore, the structure of the support plate 20 is simplified, and the support plate 20 is easily attached to the fixed clamp 22. (Third Embodiment) Next, still another embodiment of the present invention will be described with reference to FIGS.

This embodiment is basically the same as the second embodiment, but the support plate 20 is divided into three parts and the length can be adjusted. Therefore, in this embodiment, it is possible to easily change the air discharge gap G between the discharge electrodes 17 and 31 to a desired distance. (Fourth Embodiment) Another embodiment of the present invention will be described with reference to FIGS.

This embodiment is basically the same as the third embodiment, but the fixed clamp 22 rotatably supports a connecting plate 21 similar to that of the first embodiment, and the lower end of the connecting plate 21. A weight 32 is attached to the portion. Therefore, since both fixed clamps 22 receive downward force, the jumper wire 18
Holds a constant shape, and the support plate 20 is held at a predetermined position. As a result, the support plate 2 is affected by wind pressure.
The zero does not move so much, and the discharge gap G is more reliably maintained at a constant value. (Fifth Embodiment) Another embodiment of the present invention will be described with reference to FIGS.

This embodiment is basically the same as the third embodiment except that the support plate 20 is directly supported by the fixed clamp 22 and is slightly lower than the position of the support plate 20 of the third embodiment.
That is, it is arranged at a position close to the jumper wire 18. (Sixth Embodiment) Another embodiment of the present invention will be described with reference to FIGS.

This embodiment is basically the same as the fifth embodiment, but the support plate 20 is not divided and is formed of a single plate. Therefore, the support plate 20 has a simple structure. (Seventh Embodiment) Another embodiment of the present invention will be described with reference to FIGS.

This embodiment is basically the same as the fifth embodiment, but a connecting plate 21 is provided on the fixed clamp 22 so as to project upward, and a space between the connecting plate 21 and the fitting 4 is fixed. A connecting arm 33 is attached to the. That is, the connecting arm 33 includes two arms 33a and 33b,
A plurality of locking holes 34 are transparently provided in those connecting portions, and the bolts 35 are tightened and fixed so that their lengths can be adjusted. The other end of each arm 33a, 33b is connected to the connecting plate 2 respectively.
1 and the mounting bracket 6 are mounted with bolts.

Therefore, the height can be adjusted while the length of the supporting plate 20 is maintained at a predetermined value, and the supporting plate 20 can be adjusted.
The positioning will be reliable. (Eighth Embodiment) Another embodiment of the present invention will be described with reference to FIGS.

This embodiment is basically the same as the first embodiment, but the width of the support plate 20 is made narrower than the width of the support plate 20 of the first embodiment, and both end portions of the support plate 20 are formed. A weight 32 is supported on the. Therefore, the movement of the support plate 20 with respect to the wind pressure is small, and the discharge gap G is appropriately maintained.

The present invention is not limited to the above-described embodiment. For example, the support plate 20 may be replaced by a rod-shaped one, or the shape of the discharge electrode 31 fixed to the support plate 20 may be linear in the horizontal direction. The length can be changed or fixed clamp 2
The length of the second fitting portion 25 may be changed, or may be arbitrarily changed without departing from the spirit of the invention.

[0027]

As described in detail above, according to the present invention,
There is no risk of displacement of the support that supports the jumper wire, the height of the support can be adjusted, and a predetermined air discharge gap can be secured with the electrode of the lightning arrestor. Play.

[Brief description of drawings]

FIG. 1 is a front view showing the entire lightning protection device according to an embodiment of the present invention.

FIG. 2 is a partial side view showing a lightning protection insulator.

FIG. 3A is a front view showing a fixed clamp, and FIG. 3B is a side view showing the fixed clamp.

FIG. 4 is a partial front view showing a state where the support plate of the second embodiment is attached to the jumper wire.

5 is a partial cross-sectional view of FIG.

FIG. 6 is a partial front view showing a state in which the support plate of the third embodiment is attached to the jumper wire.

FIG. 7 is a partial cross-sectional view of FIG.

FIG. 8 is a partial front view showing a state in which a support plate of a fourth embodiment is attached to a jumper wire.

9 is a partial cross-sectional view of FIG.

FIG. 10 is a partial front view showing a state where the support plate of the fifth embodiment is attached to the jumper wire.

11 is a partial cross-sectional view of FIG.

FIG. 12 is a partial front view showing a state where the support plate of the sixth embodiment is attached to the jumper wire.

13 is a partial cross-sectional view of FIG.

FIG. 14 is a partial front view showing a state where the support plate of the seventh embodiment is attached to the jumper wire.

FIG. 15 is a partial cross-sectional view of FIG.

FIG. 16 is a partial front view showing a state where the support plate of the eighth embodiment is attached to the jumper wire.

FIG. 17 is a partial cross-sectional view of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Support arm, 5 ... Tensile insulator, 11 ... Lightning arrester, 18
... Jumper wire, 20 ... Support plate as a support, 22 ...
Fixed clamp, G ... Air discharge gap.

Claims (1)

[Claims] 1. A lightning arrester in which a jumper wire is connected between ends of a pair of tension insulator devices supported by a support arm of a steel tower, and a lightning insulator having a discharge electrode is supported on the support arm. A pair of clamps attached to both ends of an elongated support is attached to the wire, and a discharge electrode that forms a predetermined air discharge gap between the support and the discharge electrode of the lightning arrester is provided on the support. Lightning arrester characterized by the above.