JPH07272824A - Arresting horn insulator device - Google Patents

Abstract

PURPOSE:To keep the aerial discharge gap always constant by arranging so that the device can well work with eventual lateral swings or vertical dislocation of a jumper wire even without supporting it by an insulator. CONSTITUTION:A left and a right tension-resisting insulator 5 are coupled with a supporting arm 1 of a steel tower. Power transmitting wires 8 are supported by these insulators 5 and connected together by a jumper wire 11. An arresting insulator 22 is supported dangling at the arm 1. A discharge electrode 17 on the electricity charging side is installed on the jumper wire 11 in such a way as extending upward. At the bottom of the insulator 22, a discharge electrode 28 on the ground side mating with the discharge electrode 17 with a certain aerial discharge gap G reserved is installed while extending in the horizontal direction perpendicular to the jumper wire stretching direction. The discharge electrode 17 is arranged in such a way as protruding up and down relative to the discharge electrode 28 when viewed from the jumper wire extending direction, while the discharge electrode 28 is arranged as protruding to the left and right relative to the discharge electrode 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightning protection horn insulator device for an overhead power transmission line capable of promptly discharging a lightning surge current that has entered a power transmission line to the ground due to a lightning stroke and interrupting a follow-up current thereafter. It is a thing.

[0002]

2. Description of the Related Art Generally, in a tension insulator device for a transmission line, a pair of tension insulators are connected to a support arm of a steel tower,
Transmission lines are respectively supported at the ends of the tension insulators. Further, a jumper wire is installed between the ends of both the tensile insulators, and both power transmission lines are electrically connected via the jumper wire.

By the way, a lightning protection horn insulator device has been conventionally constructed by incorporating a lightning protection insulator into such a tension resistant insulator device. That is, a support insulator is suspended from the support arm, and the jumper wire is supported on the lower end of the support insulator. In addition, a lightning arrestor having a current limiting element inside is suspended from the tip of the support arm. A discharge electrode on the charging side is provided at the lower end of the support insulator, and a discharge electrode on the ground side is provided at the lower end of the lightning protection insulator, and both discharge electrodes face each other with a predetermined air discharge gap.

However, the supporting insulator has a large weight,
Attaching the heavy supporting insulator to the supporting arm not only complicates the structure on the steel tower, but also requires time and effort to install the supporting insulator, which makes the installation work complicated and troublesome. For this reason, there is a conventional one in which a jumper wire is provided in a free state without providing a supporting insulator, and a discharge electrode on the voltage-imparting side is provided on the jumper wire. Therefore, according to this conventional device, it is possible to save the labor required for installing the support insulator, and
The structure on the steel tower can be simplified. still,
In this way, when the jumper wire is provided in a free state, in order to prevent the jumper wire from swinging due to wind or the like,
It is usual that a reinforcing member made of a metal pipe or the like is installed between the pair of tension insulators and the jumper wire is supported by the reinforcing member.

[0005]

However, even if the jumper wire is reinforced by the reinforcing member as in the conventional case,
It was impossible to completely suppress the rolling of the jumper wire due to wind or the like. In addition, the power transmission line generates heat due to the current flowing through the power transmission line, and expands and contracts according to the change in the heat generation temperature due to the energization and the temperature change of the outside air. Then, the power transmission line installed between the adjacent steel towers in a slightly slackened state changes its position up and down as it expands and contracts. Since the tension insulator supporting the power transmission line changes vertically as the power transmission line moves up and down, the jumper wire installed between both tension insulators also moves vertically. Become.

As described above, when the jumper wire is not supported by the supporting insulator, the jumper wire sways or changes its position vertically, so that the air discharge gap should always be kept constant. However, there is a problem in that the discharge characteristics between both discharge electrodes cannot be stabilized.

The present invention has been made in order to solve the above problems, and an object of the present invention is to reliably deal with the rolling of the jumper wire and the change of the vertical position without supporting the jumper wire with a support insulator. SUMMARY OF THE INVENTION It is an object of the present invention to provide a lightning protection horn insulator device capable of stabilizing the discharge characteristics by always maintaining the air discharge gap constant.

[0008]

[Means for Solving the Problems] In order to achieve the above object, in the invention of claim 1, a pair of tension insulators are connected to a support arm of a steel tower, and a transmission line is provided to each tension insulator. Supporting, electrically connecting both transmission lines by a jumper wire, suspending and supporting a lightning arrester with a built-in current limiting element in the support arm, the jumper wire is provided with a discharge electrode on the charging side, In a lightning protection horn insulator device, in which a discharge electrode on the grounding side is provided at the lower end of the lightning protection insulator to face the discharge electrode on the charging side with a predetermined air discharge gap, both discharge electrodes are displaced in the extending direction of the jumper wire. And one discharge electrode so as to project vertically with respect to the other discharge electrode when viewed from the direction in which the jumper wire extends, and the other discharge electrode with respect to the one discharge electrode. Protruding left and right It is provided to do so.

According to the second aspect of the present invention, a reinforcing member is installed between the pair of tension insulators to reinforce the jumper wire and suppress its swinging. According to the invention of claim 3, the jumper wire is provided with a balance weight for suppressing the swing of the jumper wire and for preventing the twisting.

According to a fourth aspect of the present invention, the lightning protection insulator is arranged right above the jumper wire, the discharge electrode on the charging side is provided so as to extend upward, and the discharge electrode on the ground side is connected to the jumper wire. It is provided so as to extend in the horizontal direction orthogonal to the extending direction.

According to a fifth aspect of the present invention, the lightning protection insulator is arranged so as to be displaced in a horizontal direction orthogonal to the extending direction of the jumper wire, and the discharge electrode on the voltage applying side is horizontal to orthogonal to the extending direction of the jumper wire. The discharge electrode on the ground side is provided so as to extend downward and the discharge electrode on the ground side extends downward.

[0012]

Therefore, according to the first aspect of the present invention, the discharge electrode on the charging side and the discharge electrode on the ground side are displaced in the extending direction of the jumper wire, so that the air discharge gap is reduced. It is formed along the extending direction of the jumper wire. And
One of the discharge electrodes is provided so as to project vertically with respect to the other discharge electrode, and the other discharge electrode projects left and right with respect to the one discharge electrode when viewed from the extending direction side of the jumper wire. It is provided in. Therefore, even if the jumper wire sways or changes its position vertically,
Both discharge electrodes are always opposed to each other at the same interval, and the air discharge gap is always kept constant.

According to the second aspect of the present invention, the reinforcing member reinforces the jumper wire to suppress its swinging, so that the discharge electrode on the voltage application side on the jumper wire can be reliably positioned and the jumper wire It is possible to suppress swinging in the extending direction and prevent changes in the air discharge gap formed along the extending direction of the jumper wire.

According to the third aspect of the present invention, the balance weight suppresses the swinging of the jumper wire and prevents the twisting thereof, so that the discharge electrode on the voltage applying side on the jumper wire can be reliably positioned.

According to the invention of claim 4, when the space for arranging the lightning arrestor can be secured between the support arm and the jumper wire, the lightning arrestor is arranged right above the jumper wire and the steel tower is installed. The structure above can be cleaned. At this time, if the jumper wire sways,
The discharge electrode on the side of the lightning protection insulator extending in the horizontal direction orthogonal to the extending direction of the jumper wire maintains the facing relationship with the discharge electrode on the jumper wire side. Further, when the position of the jumper wire changes vertically, the discharge electrode on the jumper wire side extending upward maintains the facing relationship with the discharge electrode on the lightning protection insulator side.

According to the fifth aspect of the present invention, for example, when the lightning protection insulator is long, and it is not possible to secure a space for disposing the lightning protection insulator between the support arm and the jumper wire, This can be easily done by disposing the lightning protection insulator by displacing it in the horizontal direction orthogonal to the extending direction of the jumper wire. At this time, when the jumper wire sways, the discharge electrode on the jumper wire side extending in the horizontal direction orthogonal to the extending direction of the jumper wire maintains the facing relationship with the discharge electrode on the lightning protection insulator side. When the position of the jumper wire changes vertically, the discharge electrode on the side of the lightning arrester extending downward maintains the facing relationship with the discharge electrode on the side of the jumper wire.

[0017]

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, a pair of left and right mounting arms 2 are fixed to both sides of a support arm 1 of a steel tower, and a yoke 3 is connected to each mounting arm 2. Two yoke insulators 5 are provided on each end of each yoke 3.
The two sets of tension insulators 5 connected in series are connected and arranged in parallel via the connecting link 4. A yoke 7 is connected to the end portion of the tension insulator 5 on the side where the power is applied via a connecting link 6, and an electric wire clamp metal fitting 9 for clamping the power transmission line 8 is connected to the yoke 7 via a connecting metal fitting 10. .
A jumper wire 11 is connected to each of the left and right connecting fittings 10 with jumper wire clamp fittings 11a at both ends thereof, and the left and right power transmission lines 8 connected to the respective connecting fittings 10 are electrically connected via the jumper wires 11. It is connected.

The reinforcing pipes 12 are horizontally arranged so as to extend along the extending direction of the jumper wire 11, and both ends of the reinforcing pipes 12 are fixedly connected to the left and right connecting fittings 10 via supporting pipes 13 provided obliquely. Has been done. The jumper wire 11 is hung and supported just below the reinforcing pipe 12 via a plurality of supporting bodies 14 to be reinforced. As a result, the jumper wire 11 is arranged such that the intermediate portion thereof does not hang downward and extends linearly in the horizontal direction, and the swing caused by an external force such as wind is suppressed. The reinforcing pipe 12 and the support pipe 13
Is formed of a metal material such as an aluminum material or a steel material. In this embodiment, the reinforcing pipe 12 and the support pipe 13 form a reinforcing member.

As shown in FIGS. 1 to 3, the electrode mounting bracket 1
Reference numeral 5 is attached to the right side of the intermediate portion of the reinforcing pipe 12 in FIG. 1, and a mounting plate 15a is fixed to the upper portion of the reinforcing pipe 12 so as to extend in the horizontal direction orthogonal to the axis of the reinforcing pipe 12. A plurality of balance weights 16 made of metal plates are attached to both ends of the attachment plate 15a.
The weight of the weight 16 prevents the jumper wire 11 from swinging due to an external force such as wind. The balance weight 16 is attached to the mounting plate 15
The same number is attached to both end portions of a so that the weights thereof are balanced, and the center of gravity is provided below the reinforcing pipe 12. This prevents the jumper wire 11 supported by the reinforcing pipe 12 from being twisted about its axis.

On the upper surface of the electrode mounting member 15, a pair of discharge electrodes 1 on the charging side are formed by bending a metal rod in an inverted U shape.
7 are vertically fixed, and these discharge electrodes 17 extend upward. In the vicinity of the electrode mounting bracket 15,
A conductive fitting 18 is attached to the jumper wire 11, and the conductive fitting 18 is connected to the electrode mounting fitting 15 via a conductor 19. The electrode fitting 15 is electrically connected to the jumper wire 11 via the conductive fitting 18 and the conductor 19.

As shown in FIGS. 1 and 2, a mounting adapter 21 is fixed to the lower surface of the tip of the supporting arm 1, and a lightning protection insulator 22 is provided on the mounting adapter 21 on the ground side. It is fixed by hanging with the electrode fitting 23. This lightning protection insulator 22 is shown in FIG.
It is arranged in the state of being displaced to the left of
As shown in, the jumper wire 11 is arranged directly above. The lightning protection insulator 22 has a current limiting element 24 whose main component is zinc oxide (ZnO) having a non-linear voltage-current characteristic.
The electrode metal fitting 25 on the charging side is provided at the lower end thereof. In addition, arc horns 26 and 27 are attached to the electrode fittings 23 and 25, respectively, for reducing damage at the time of a surface flash of the lightning protection insulator 22.

As shown in FIGS. 1 to 3, a discharge electrode 28 on the ground side is attached to the electrode fitting 25 on the charging side,
The discharge electrode 28 extends in the horizontal direction orthogonal to the extending direction of the jumper wire 11. Also, this discharge electrode 28
Is a jumper wire 1 for the discharge electrode 17 on the charging side.
1 is displaced in the extending direction of 1 and is opposed to the discharge electrode 17 with a predetermined air discharge gap G. That is, the air discharge gap G is formed along the extending direction of the jumper wire 17.

In this embodiment, the discharge electrode 17 on the charging side extends upward, its upper end is located above the discharge electrode 28 on the ground side, and the discharge electrode 28 on the ground side is The jumper wire 11 extends in a horizontal direction orthogonal to the extending direction of the jumper wire 11. That is, in this embodiment, the discharge electrode 17 on the charging side is provided so as to vertically project from the discharge electrode 28 on the ground side as viewed from the extending direction side of the jumper wire 11, and the discharge on the ground side is performed. The electrode 28 is provided so as to project to the left and right with respect to the discharge electrode 17 on the charging side.

Next, the operation of the lightning protection horn insulator device constructed as described above will be described. Now, when a lightning surge current due to a lightning strike flows through the power transmission line 8, the current is jumper wire 1
1 to the discharge electrode 17 on the charging side, and the flashover from the discharge electrode 17 to the discharge electrode 28 on the ground side via the air discharge gap G. Then, the lightning surge current flows through the electrode fitting 25 of the lightning protection insulator 22, the current limiting element 24, the electrode fitting 23, the mounting adapter 21, and the support arm 1 to the tower, and is discharged to the ground. Further, the subsequent current generated thereafter is suppressed and cut off by the current limiting element 24.

Further, in this embodiment, both discharge electrodes 17, 28 are
Is displaced and arranged in the extending direction of the jumper wire 11,
The air discharge gap G is formed along the extending direction of the jumper wire 17. Moreover, when viewed from the extending direction side of the jumper wire 11, the discharge electrode 17 on the charging side is provided so as to vertically project from the discharge electrode 28 on the ground side, and the discharge electrode 28 on the ground side is charged. It is provided so as to project to the left and right with respect to the discharge electrode 17 on the side.

Therefore, even if wind pressure or the like acts on the jumper wire 11 to cause the jumper wire 11 to roll laterally, the discharge electrode 2 on the ground side when viewed from the extending direction side of the jumper wire 11.
Only the facing position of the discharge electrode 17 on the charging side with respect to No. 8 is changed to the left and right, and the discharge electrodes 17 and 28 are always maintained in the facing relationship at the same interval. Further, even if the jumper wire 11 changes its position vertically due to the power transmission line 8 expanding and contracting in accordance with the change of the heat generation temperature and the temperature change of the outside air, when viewed from the extension direction side of the jumper wire 11. , Discharge electrode 2 on the ground side
Only by changing the facing position of the discharge electrode 17 on the charging side with respect to No. 8, the discharge electrodes 17 and 28 are always maintained in the facing relationship at the same interval. Therefore, the air discharge gap G formed along the extending direction of the jumper wire 17 does not change, and the gap G can always be kept constant, and the discharge between the discharge electrodes 17 and 28 can be maintained. The characteristics can be stabilized. As a result, the electrical reliability of the device can be improved.

Further, in this embodiment, the jumper wire 11 is reinforced by the reinforcing pipe 12 and the support pipe 13 to suppress the swing of the jumper wire 11. In addition, by providing the balance weight 16, the swinging of the jumper wire 11 is more reliably suppressed, and the twisting of the jumper wire 11 is also prevented. Therefore, the discharge electrode 17 on the voltage applying side on the jumper wire 11 can be reliably positioned at a predetermined position, and the discharge electrode 17 can be accurately arranged to face the discharge electrode 28 on the ground side. . Therefore, these are also effective in keeping the air discharge gap G constant. Particularly, by reinforcing the jumper wire 11 with the reinforcing pipe 12 and the support pipe 13, the jumper wire 1
1 can be reliably suppressed from swinging in the extending direction, and the air discharge gap G formed along the extending direction of the jumper wire 11 can be reliably prevented from changing. You can

From the above, in the present embodiment, it is possible to surely deal with the rolling of the jumper wire 11 and the change of the vertical position without supporting the jumper wire 11 by the support insulator. Further, in this embodiment, since the lightning protection insulator 22 is arranged right above the jumper wire 11 and is located in the space between the support arm 1 and the jumper wire 11,
The lightning protection insulator 22 does not project to the outside of the support arm 1, and as a result, the structure on the steel tower can be made clean.

The present invention is not limited to the above embodiment, but can be embodied in the following modes, for example. (1) As shown in FIGS. 4 and 5, the lightning protection insulator 22 should be displaced in the horizontal direction orthogonal to the extending direction of the jumper wire 11. That is, the mounting adapter 21 is attached to the support arm 1
The lightning protection insulator 22 is fixed to the tip of the mounting adapter 21 so as to project in the horizontal direction.
Then, the discharge electrode 28 on the ground side is attached to the electrode fitting 25 at the lower end of the lightning protection insulator 22 so as to extend downward. In addition, the discharge electrode 17 on the voltage applying side on the jumper wire 11
Are provided so as to extend in the horizontal direction orthogonal to the extending direction of the jumper wire 11. Contrary to the above embodiment, the discharge electrode 17 on the charging side is provided so as to project to the left and right with respect to the discharge electrode 28 on the ground side as viewed from the extending direction side of the jumper wire 11, and The discharge electrode 28 is provided so as to vertically project with respect to the discharge electrode 17 on the charging side.
The discharge electrodes 17 and 28 are arranged so as to be displaced in the extending direction of the jumper wire 11, and the air discharge gap G is formed along the extending direction of the jumper wire 17 in the above embodiment. Is the same as. Further, the balance weight 16 is attached to the reinforcing pipe 12 so as to be balanced with the discharge electrode 17 on the charging side.

According to this another example, when the jumper wire 11 sways due to wind or the like, the discharge electrode 17 on the side of the jumper wire 11 extending in the horizontal direction orthogonal to the extending direction of the jumper wire 11 causes , The facing relationship with the discharge electrode 28 on the side of the lightning protection insulator 22 is maintained. Further, when the jumper wire 11 is vertically displaced, the discharge electrode 28 on the side of the lightning arrestor 22 extending downward maintains the facing relationship with the discharge electrode 17 on the jumper wire 11 side.
Therefore, also in this another example, as in the above-mentioned embodiment,
The air discharge gap G can be kept constant at all times, and it is possible to reliably deal with the sway of the jumper wire 11 and the change in the vertical position.

Further, if the lightning arrestor 22 is arranged so as to be displaced in the horizontal direction orthogonal to the extending direction of the jumper wire 11 as in this another example, the lightning arrestor 22 may be long, for example. Even if the space for arranging the lightning protection insulator 22 cannot be secured between the arm 1 and the jumper wire 11, it is possible to easily cope with the situation.

(2) Reinforcing the jumper wire 11 with the reinforcing pipe 12
The structure should be inserted inside.

[0033]

As described above in detail, according to the present invention,
It has the following excellent effects. According to the invention of claim 1, even if the jumper wire is not supported by the support insulator, it is possible to reliably deal with the sway of the jumper wire and the change of the vertical position, and the air discharge gap is always kept constant. The discharge characteristics can be stabilized.

According to the second and third aspects of the present invention, the swing of the jumper wire can be suppressed, and the discharge electrode on the charging side can be reliably positioned. Particularly, according to the second aspect, it is possible to suppress the jumper wire from swinging in its extending direction, and the air discharge gap formed along the extending direction of the jumper wire changes. Can be blocked. Further, according to claim 3, twisting of the jumper wire can be prevented.

According to the invention of claim 4, the structure on the steel tower can be made neat. According to the invention of claim 5, even when the lightning protection insulator is long, for example, and it is not possible to secure a space for disposing the lightning protection insulator between the support arm and the jumper wire, it is possible to easily cope with the situation. can do.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a lightning protection horn insulator device embodying the present invention.

FIG. 2 is a side view of the lightning protection horn insulator device.

FIG. 3 is a perspective view of a main part showing a facing relationship between a discharge electrode on a voltage applying side and a discharge electrode on a ground side.

FIG. 4 is a perspective view schematically showing another example of the present invention.

FIG. 5 is a side view schematically showing another example of the same.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Support arm, 5 ... Tensile insulator, 8 ... Transmission line, 11 ... Jumper wire, 12 ... Reinforcement pipe which comprises a reinforcement member, 1
3 ... Support pipes constituting a reinforcing member, 16 ... Balance weights, 17 ... Discharge electrodes on the charging side, 22 ... Lightning arresters, 2
4 ... Current limiting prevention, 28 ... Ground side discharge electrode, G ... Air discharge gap.

Claims (5)

[Claims] 1. A pair of tension insulators are connected to a support arm of a steel tower, and each tension insulator supports a power transmission line, and both transmission lines are electrically connected by a jumper wire,
A lightning arrester with a current limiting element built in is suspended from the support arm, and a discharge electrode on the charging side is provided on the jumper wire, and a discharge electrode on the charging side and a predetermined gas are provided at the lower end of the lightning arrester. In a lightning protection horn insulator device provided with discharge electrodes on the ground side facing each other with a middle discharge gap, the discharge electrodes are arranged displaced in the extension direction of the jumper wire, and viewed from the extension direction side of the jumper wire, A lightning protection horn insulator device, wherein one discharge electrode is provided so as to project vertically with respect to the other discharge electrode, and the other discharge electrode is provided so as to project laterally with respect to one discharge electrode. 2. The lightning protection horn insulator device according to claim 1, further comprising a reinforcing member provided between the pair of tension insulators to reinforce the jumper wire and suppress the swing thereof. 3. The lightning protection horn insulator device according to claim 1, wherein the jumper wire is provided with a balance weight for suppressing swinging of the jumper wire and for preventing twisting. 4. The lightning protection insulator is arranged right above a jumper wire, and the discharge electrode on the charging side is provided so as to extend upward, and the discharge electrode on the ground side is orthogonal to the extending direction of the jumper wire. The lightning protection horn insulator device according to any one of claims 1 to 3, which is provided so as to extend in a horizontal direction. 5. The lightning protection insulator is arranged so as to be displaced in the horizontal direction orthogonal to the extending direction of the jumper wire, and the discharge electrode on the voltage applying side extends in the horizontal direction orthogonal to the extending direction of the jumper wire. The lightning protection horn insulator device according to claim 1, wherein the grounding-side discharge electrode is provided so as to extend downward.