JPH06162853A - Jumper wire supporting insulator device - Google Patents

Abstract

PURPOSE:To provide a jumper wire supporting device easily mountable regardless of the some dimension shortage of a jumper wire, in particular fittable to the jumper wire of an angle iron tower. CONSTITUTION:In this jumper wire supporting device, a pair of strain insulators are mounted on the supporting arm 1 of an iron tower, and a jumper wire 19 is installedly connected between the end parts of the pair of strain insulators. A lightning protection insulator is suspendedly fixed to the supporting arm 1, a weight 23 is mounted on a horn mounting bracket 15 in the lower end of the light protection insulator, and the jumper wire 19 is gripped. The jumper wire 19 is gripped at a position near to the supporting arm 1 than the weight 23 of the lightning protection insulator, and also is gripped by a gripping fitting 17 position-adjustable in a vertical direction. Moreover, the gripping fitting 17 is mounted on a horn mounting bracket 15 via a bracket.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jumper wire support insulator device.

[0002]

2. Description of the Related Art Generally, in a transmission line tension insulator device having a jumper wire support insulator device, a jumper wire is provided between a pair of tension resistant insulators for supporting the transmission line on the transmission line connection side. The transmission lines are connected to each other and the air insulation between the transmission lines and the steel tower support arm is maintained.
There are two methods for assembling the lightning protection insulator in this tension device, that is, a method of incorporating the lightning protection insulator on the main line side or a method of installing it for supporting the jumper wire. In the case of incorporating a double device (applying the lightning protection insulator only to one side) on the main line side, a weight imbalance of the insulator series occurs and a large balance weight is required. For this reason, a jumper-supported type, which is usually applicable in series, is applied.

In the case of a jumper-supported lightning protection insulator, a lower surface of a weight provided on an electric wire support fitting is provided with a recess, and a jumper wire is held in the recess.

[0004]

However, in the above-mentioned prior art, since the grip portion of the jumper wire is located at the lowermost end of the lightning arrester device, the distance between the grip portion and the steel tower mounting portion of the insulator device is small. It becomes long and the balance is bad. Therefore, a heavy balance weight is required, and an excessive weight load is applied to each part of the device. In addition, in the conventional device, since the lower surface of the weight is recessed in order to provide the grip portion, the weight becomes large and it is easy to receive the wind pressure.

Further, since the jumper wire has a high rigidity, it is not easy to loosen the jumper wire and hold it under the weight, and the lightning protection insulator cannot be attached due to insufficient length of the jumper wire. Even there. Therefore, in such a case, a new jumper wire has to be reattached, which requires extra man-hours. Especially in angle towers where the extension direction of the power transmission line changes at the support part of the tower, the jumper wire is supported diagonally to the lightning arrestor, so it is not easy to hold the jumper wire under the weight. There was a problem.

The present invention has been made by paying attention to the problems existing in such a conventional technique, and the purpose thereof is to achieve a good balance, a small outer shape of the weight, and a jumper. It is an object of the present invention to provide a jumper wire support insulator device that allows wires to be easily attached to a jumper wire of an angle tower, regardless of some size shortage.

[0007]

In order to achieve the above object, in the first aspect of the present invention, a weight is provided through a metal fitting at the bottom of an insulator string which is suspended and fixed to a support arm of a steel tower. In the jumper wire support insulator device for supporting the jumper wire on the metal fitting, the gist is that the support portion for the jumper wire is provided at a position closer to the support arm than the weight.

Further, the gist of the second invention is to provide a lightning protection insulator function by providing a current limiting element having a non-linear voltage-current characteristic in the insulator series. In the third invention,
The gist of the present invention is that the supporting portion of the jumper wire is composed of a holding metal fitting that can adjust the position in the vertical direction.

Further, the gist of the fourth invention is that the gripping metal member is fixed to the horn mounting metal member through a bracket.

[0010]

With the above structure, in the support insulator device according to the first aspect of the invention, the jumper wire is held at a position closer to the arm than the weight, and the fulcrum is raised to stabilize the balance.
The weight can be reduced.

According to the second aspect of the invention, even in the lightning arrester having the lightning protection function, the balance is stable and the weight can be reduced. In the third aspect of the invention, the jumper wire is held by the holding metal fitting whose position can be adjusted in the arm direction.
Even if the length of the jumper wire is different, the position of the gripping metal can be adjusted to easily support the jumper wire.

In the fourth aspect of the invention, since the gripping metal fitting is fixed to the horn mounting metal fitting via the bracket, the jumper wire can be easily supported also on the angle tower corresponding to the length of the jumper wire.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First embodiment of the jumper wire support insulator device of the present invention using a suspension type lightning arrester with a gap.
Examples will be described with reference to the drawings.

As shown in FIG. 1, the hanging metal fitting 2 is attached to a support arm 1 of a steel tower, and an upper horn mounting metal fitting 4 is connected to the hanging metal fitting 2 via a U clevis 3. The insulator string 5 is composed of a plurality of suspension type lightning protection insulators 6 connected in series, and a plurality of normal suspension insulators 7 connected in series to the lower part thereof.

A cap metal fitting 10 is fitted and fixed to the head portion 9 of the main body 8 of the suspension type lightning protection insulator 6 with cement, and an arc guide 11 is horizontally fixed to the outer periphery thereof. The plurality of mounting tube portions 12 are integrally formed with the cap portion 13 of the main body 8, and a current limiting element (not shown) made of a material whose main characteristic is zinc oxide and whose voltage-current characteristic is non-linear is provided inside thereof.
Is housed. One end of the current limiting element is connected to the cap metal fitting 10, and the other end is electrically connected to the cap metal fitting 10 of the lightning protection insulator 6 located below the lightning protection insulator 6. Further, the intermediate arc horn 14 is fixed to the lightning protection insulator 6 on the most electricity applying side and electrically connected to the current limiting element.
The intermediate arc horn 14 faces a lower arc horn 22, which will be described later, to form an air space gap G having a predetermined distance.

An insulator string 5 including the lightning protection insulator 6 is swingably supported by an upper horn mounting member 4 so as to be swingable. The lower horn fitting 15 is connected to the lower end of the insulator string 5. The lower horn mounting member 15 has a plurality of long holes 16
Are formed. The electric wire clamp 17, which is a holding metal fitting, is fixed to the elongated hole 16 by tightening with a bolt 18.
The position can be adjusted vertically. The jumper wire 19 is gripped by the electric wire clamp 17 and fixed by the bolt 20.

The pair of arc horns 21 and 22 are attached to the upper and lower horn fittings 4 and 15, and the arc horns 21 and 22 reduce damage to the surface flashing of the insulator string 5 due to external contamination. Further, the weight 23 is suspended under the lower horn mounting bracket 15.

Next, the operation of the embodiment configured as described above will be described. Now, in FIG. 1, when a lightning surge current enters the jumper wire 19, this current flashes from the wire clamp 17 to the lower horn mounting bracket 15 and from the lower arc horn 22 through the air discharge gap G to the intermediate arc horn 14. Flow to. Then, from the intermediate arc horn 14, the current limiting element of the lightning protection insulator 6 at the lowermost end, the cap metal fitting 10, and further the current limiting element of the lightning protection insulator 6 thereon, and then the upper horn mounting metal fitting 4, the hanging metal fitting. Two
Through it to the support arm 1 of the steel tower and discharged to the ground.

Further, the follow-up current following the lightning surge current is suppressed and interrupted by the air discharge gap G between the intermediate arc horn 14 and the lower arc horn 22 and the restoration of the resistance value of each current limiting element, so that a ground fault occurs. Accidents are prevented.

On the other hand, regarding the method of supporting the jumper wire 19, the wire clamp 17 is loosened by loosening the bolt 18 of the wire clamp 17 bolted to the lower horn mounting bracket 15.
Adjust the vertical position of and tighten the bolt 18. Then, the bolt 20 is loosened, and the clamp 17 is made to grip the jumper wire 19. Then tighten the bolt 20 and jumper wire 1
Fix 9

As described above, in the lightning arrester device of this embodiment, since the jumper wire 19 is fixed to the lower horn mounting member 15 which is the upper portion of the weight 23, the balance is stabilized and the weight of the weight 23 is reduced. 100 kg to 70
It can be reduced to about kg. In addition, the concave jumper mounting portion of the weight 23 that has been conventionally formed can be eliminated, the weight 23 can be downsized, and fluctuations due to wind pressure can be reduced. Further, since the wire clamp 17 is fixedly attached to the lower horn mounting member 15 so that the position of the jumper wire 19 can be adjusted, the jumper wire 19 can be easily mounted according to the length and the like.

Further, since the jumper wire 19 is close to the horn fitting, corona can be preferably prevented in terms of electric field.

[0023]

[Second Embodiment] A second embodiment of the present invention will now be described with reference to the drawings. In the following description, the same components as those of the above-described embodiment will be denoted by the same reference numerals in the drawings and will not be described.

As shown in FIG. 2, a pair of tension insulators 24 are provided on the support arm 1 of the tower body so as to be orthogonal to each other. A suspension type lightning arrester similar to that of the first embodiment is suspended on the support arm 1. The jumper wires 19 are arranged between the ends of the pair of tension insulators 24 to which the power transmission lines 25 are connected. The middle part of the jumper wire 19
It is gripped by the electric wire clamp 17 of the lightning protection insulator, and the electric wire clamp 17 is fixed to the bracket 26.

As shown in FIG. 3, the bracket 26 is fixed to the elongated hole 16 of the lower horn mounting member 15 by a bolt 18 so as to be vertically adjustable. Further, depending on the mounting condition of the jumper wire 19, the bracket 26 having an appropriate angle with the lower horn mounting bracket 15 as shown by the dotted line.
It has been replaced with a and fastened.

In this embodiment, the jumper wire 19
Is held by the lower horn mounting member 15 via the bracket 26, so that the jumper wire 19 can be supported away from the lightning protection insulator. Therefore, the jumper wire 19 can be easily supported even in an angle tower in which the extending direction of the power transmission line 25 changes.

The present invention is not limited to the configuration of the above embodiment, but may be applied to a gapless type lightning protection insulator, for example. Further, the screw hole 27 for fixing the electric wire clamp 17 of the bracket 26 may be made a vertically long hole so as to increase the position adjustment distance, and may be arbitrarily modified and embodied without departing from the spirit of the present invention. It is possible.

[0028]

According to the first aspect of the invention, the jumper wire is gripped at a position closer to the arm than the weight, so that the balance is stabilized, and the weight can be made compact and the weight can be reduced.

According to the second aspect of the invention, even in the lightning protection insulator having the lightning protection function, the balance is stabilized, and the weight can be made compact and the weight can be reduced.
In the third aspect of the invention, the jumper wire is gripped by the gripping metal that is movable in the arm direction, so that the jumper wire can be easily attached even if the length of the jumper wire is different.

According to the fourth aspect of the invention, the holding metal fitting is fixed to the horn mounting metal fitting through the bracket, and the jumper wire can be easily attached to the angle steel tower.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of a jumper wire support insulator device embodying the present invention.

FIG. 2 is a plan view showing a mounted state of a jumper wire support insulator device of a second embodiment.

FIG. 3 is a side view showing an attachment portion of an electric wire in a jumper wire support insulator device of a second embodiment.

[Explanation of symbols]

1 support arm, 6 suspension type lightning arrestor, 7 normal suspension insulator, 15 lower horn mounting bracket, 17 wire clamp which is a gripping bracket, 19 jumper wire, 23 weight,
24 tension insulators, 26 brackets.

Claims (4)

[Claims] 1. A jumper wire support insulator device in which a weight is provided at a lower portion of an insulator string suspended and fixed to a support arm of a steel tower via a metal fitting, and a jumper wire is supported by the metal fitting in a support arm from the weight A jumper wire support insulator device, wherein the jumper wire support portion is provided at a close position. 2. The jumper wire support insulator device according to claim 1, wherein the insulator string is provided with a current limiting element having a non-linear voltage-current characteristic so as to have a lightning protection insulator function. 3. The jumper wire support insulator device according to claim 1, wherein the support portion of the jumper wire is constituted by a holding metal fitting capable of vertically adjusting a position. 4. The jumper wire support insulator device according to claim 3, wherein the grip fitting is fixed to the horn mounting fitting via a bracket.