JPH0512943A - Bird damage preventive device for suspension insulator power transmission line - Google Patents

Abstract

PURPOSE:To prevent ground shortcircuiting caused by bird nesting material such as wire at the suspension insulator of a power transmission line by fixing an insulative shield plate to a string of suspension insulators, wherein the outside dia. of the shield plate is greater than that of the insulator, and by covering a jumper wire etc., insulatedly. CONSTITUTION:An insulator fitting hole 2 in an insulative shield plate 1 is fitted on the upper part 5b of the undermost insulator 5a of a string of suspension insulators 5, and thus the shield plate 1 is fixed. The outside dia. R of this plate 1 shall be greater than that of the insulator 5a, demensioning so that the periphery 3 of the plate 1 goes beyond the tips of arc horns and blocks the electric discharge gap Z1 between the tips of arc horns 6, 7 and the electric discharge gap Z2 between a discharge electrode 13 at the bottom of a lightning arrester and the tip of the arc horn 8. Accordingly eventually dangling wires etc., as a bird B nesting material is prevented from touching the live part, and occurrence of ground shortcircuiting can be preclubed. Further, a jumper wire etc., at the jumper wire insulative hangdown part is covered insulatedly, and the jumper wire exposed part is grasped by a suspension clamp, so that ground shortcircuiting can be prevented even through wires etcs. have dangled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing bird damage in an insulating suspension part of a suspension part or a tension part of an overhead power transmission line, a jumper wire insulating suspension part, and the like.

[0002]

2. Description of the Related Art Most of the factors that cause power outages that have a great impact on society are predictable meteorological phenomena such as lightning, typhoons, and snow, but they cannot be predicted due to birds suddenly occurring on a calm day. Power outages account for more than 10% of all accidents. This blackout caused by birds is mainly caused by contact with crows, and as a countermeasure against this bird damage, there are measures to prevent birds from approaching, such as needle towers, windmills, mirrors, eyeballs, crow models, and threads / tegs. Attempts have been made, but they become useless in a short period of time due to the learning effects of birds.

In order to prevent a short circuit between arc horns even if a bird stops by covering the arc horn with an insulating material, like the horn-covered bird damage preventive tool of Japanese Utility Model Laid-Open No. 1-30746. There is a device in which an inverted U-shaped fitting portion is covered with an insulating cover in which an upper rib and a lower rib are projected so as to cover the tip of the arc horn so that the arc horn is not short-circuited even if a bird stops. , It is not possible to attach a hard insulator cover to a complicatedly bent arc horn, and installing an insulator such as a cover on the charging side has a problem in terms of tracking resistance, There is a drawback that the insulator is damaged by the arc at the time.

As a countermeasure against this, a series of small insulators with small gaps are inserted in the steel tower side arc horn of the insulator device where bird damage frequently occurs so as to electrically insulate the birds so that even if the birds short-circuit the arc horns, flashover does not occur. A bird damage prevention horn has been proposed.

For example, in the bird damage prevention device of Japanese Patent Laid-Open No. 63-281323, one ground side horn of one of the main arc horns attached to both sides of the tension insulator series is supported at the end of the insulator series via a small insulator. , This pair of small insulators are provided with a pair of sub arc horns, and even if a bird stops and shorts between the main arc horns,
A secondary arc horn maintains insulation to ground.

The arc horn having a bird damage preventing function disclosed in JP-A-64-65730 is a small insulator in which one ground side horn of one of the main horns attached to both sides of the tension insulator string is provided at the end of the insulator string. The small insulator is provided with a pair of small gap horns and a ring-shaped auxiliary horn to maintain ground insulation, and a guard is attached to the horn supported by the small insulators to prevent bird contact.

Further, the bird damage prevention device for the double-strand insulator device of Japanese Utility Model Laid-Open No. 64-40121 is equipped with a small insulator on a yoke for supporting the double stretch insulators, and a pair of small insulators are attached to the small insulator. A gap horn is provided, a main horn is attached to the tip of the insulator, and an arc fixing horn is attached diagonally upward from the base of the insulator to prevent bird damage.

[0008]

Recently, a lightning arrester is installed at a support point of a transmission line in order to prevent a power failure accident due to lightning or the like. Some of such lightning arresters have a gap and some do not. The suspension part and the suspension part of the jumper wire are complicated, and if you use a suspension insulator or attach a lightning arrester using the jumper wire of the tension device, the overhanging of the mounting bracket will become longer and it will be easier for birds to stop. However, because the length of the arc horn on the power supply side is significantly longer,
In such a place, it is difficult to prevent bird damage with a conventional device. Contact accidents with birds are not only accidents caused by direct contact with birds, but also accidents caused by contact with nesting materials.Both of the bird damage prevention devices equipped with small insulators with small gaps described above are accidents due to contact with nesting materials. Can't escape.

For example, as shown in FIG. 8, a bird B is placed above the suspension insulator C in the insulated suspension part of the transmission line by the suspension insulator or the like.
If the grounding side horn D and the charging side horn E are short-circuited by the nesting material wire A or the like which has stopped and has been carried by the beak, there is a disadvantage that the small gap G provided in the small insulator F becomes completely useless.

It is an object of the present invention to provide a bird damage prevention device for a power line insulating suspension which prevents a ground fault due to a nesting material for birds such as wires in the power cable insulating suspension.

[0011]

In order to achieve the above-mentioned object, a bird damage prevention device for a power line insulating suspension according to the present invention comprises: (1) Suspended insulator and long trunk suspended vertically downward from a steel tower structure. An insulator, such as an insulator or a lightning arrester, is provided with an insulating shield plate 1 made of an insulating material such as rubber or plastic having an outer diameter larger than the outer diameter of the insulator.

(2) Further, in the insulated jumper wire suspension shown in FIG. 7, the jumper wire 20 is covered with an insulating coating 21, and the suspended clamp holding portion is provided with an exposed portion 20a of the jumper wire obtained by peeling the insulating coating 21. The wire exposed portion 20a is held by the suspension clamp 9.

(3) Further, a lightning arrester in which a part of the tip of the arc horn on the charging side is left and most of the arc horn is covered with an insulator coating 19 is installed.

[0014]

[Operation] Suspended insulator suspended vertically downward from the tower structure,
The bird A stops above the trunk insulator, the lightning arrestor insulator, etc., and the wire A, etc. of the nesting material carried by the beak hangs downward, and its lower end will contact the arc horn on the side of the electricity projecting sideways from the lower end of the insulator. As the insulation shield plate is attached to the insulator part above it, the lower part of the hanging wire etc. is received by the peripheral part of the insulation shield plate and hangs outward from this peripheral part. Depart from the horn. As a result, the nesting material does not come into contact with the arc horn on the power-supply side, preventing a ground fault.

Further, since the jumper wire 20 is covered with the insulating coating 21, the wire N etc. of the bird nesting material which has stopped at the upper side A
Even if the wire hangs down and touches the insulating coating 21 of the jumper wire 20, it does not come into direct contact with the conductor of the jumper wire, so a ground fault is prevented. The part where the jumper wire is held by the suspension clamp 9 is the exposed part of the jumper wire with the insulation coating peeled off.
Tracking of the insulation is prevented because a suspension clamp grips a. Since the insulating shield plate 1 covers the exposed portion 20a of the jumper wire in this grip portion, the wire A or the like of the nesting material does not come into contact with the exposed portion of the jumper wire 20a.

Further, a lightning arrester is installed to leave a part of the tip of the arc horn on the power supply side, and most of the horn is covered with an insulator.
Since it is covered with 19, even if the wire A, etc. of the bird nesting material that stopped above hangs downward, it does not directly contact the conductor part of the horn, so a ground fault does not occur.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.
1 of the front view and FIG. 2 of the bottom view showing one embodiment of a bird damage prevention device for a power line insulation suspension part of the present invention, in which 1 is an insulator such as silicon rubber or fluororesin. Is an insulating shield plate made of aluminum, and an insulating disc is formed into a bowl shape or an umbrella shape, and an insulator mounting hole 2 is provided in the center thereof, and the outer diameter R of the peripheral edge portion 3 is larger than the outer diameter of the insulator to be mounted. It was formed in.

FIG. 3 shows an embodiment in which the insulating shield plate 1 is mounted on a suspension insulator device provided with a gap type lightning arrester.
Is an arm part of a steel tower, 5 is a suspension insulator string, 5a is an insulator at the lower end of a suspension insulator string, 6 is an arc horn on the ground side, 7 and 8 are arc horns on the side of electricity application, 9 is a suspension clamp, 10 is a transmission line , 11 is an arrester of the arrester, 12 is a support plate for suspending the arrester extending from the arm 4, 4 is a gap discharge electrode at the lower end of the arrester, Z1 is a discharge gap between the arc horn 6 on the ground side and the arc horn 7 on the power-supply side, Z2 is a discharge gap between the gap discharge electrode 13 at the lower end of the lightning arrester and the arc horn 8 on the voltage application side. 19 indicated by the chain line
Is an insulator coating provided on the charging side arc horns 7 and 8 with the tip portion left.

The upper part of the insulator 5a at the lower end of the suspension insulator string 5 described above.
The insulator mounting hole 2 of the insulating shield plate 1 is fitted and fixed to 5b. This insulating shield plate 1 has an outer diameter R formed to be larger than the outer diameter of the insulator 5a, but the peripheral edge 3 exceeds the tip of the arc horn and the discharge gap Z1 between the tips of the arc horns 6 and 7 and the lower end of the arrester. The discharge gap Z2 between the discharge electrode 13 and the tip of the arc horn 8 is formed in such a size that it does not block, and the diameter of the insulator mounting hole 2 is formed so that it can be fitted into the upper portion 5b of the insulator 5a. Further, the mounting position and the number of the insulating shield plate 1 are not limited to only one position of the insulator 5a at the lowermost end of the suspension insulator string 5, but also above it or in the middle portion or the upper portion of the suspension insulator string 5 as required. May be attached.

As described above, the insulating shield plate 1 is attached to the suspension insulator device.
By mounting the armrest part 4 above the suspension insulator string 5
Even if the bird B stops and the wire A etc. of the nesting material carried by the beak hangs down, the lower part of the wire A etc. is received by the peripheral edge 3 of the insulating shield plate 1 and hangs outward of the peripheral edge 3. Since the arc horns 7 and 8 on the charging side are not contacted, ground faults on the charging side and the grounding side are prevented.

FIG. 4 shows an embodiment in which the above-mentioned insulating shield plate 1 is attached to the lightning arrester in the suspension insulator part of 77KV class, as seen in the longitudinal direction of the transmission line, and 4 is a suspension insulator string 5. A wire arm part for suspending the wire, 8 is an arc horn on the charging side provided below the suspension insulator string 5, 9 is a suspension clamp, 10 is a power line, 14 is an overhanging metal fitting extending laterally from the arm part 4, 11 is a lightning arrester attached to this overhanging metal fitting 14, 13 is a lightning arrester 11
Is the gap discharge electrode at the lower end of. Reference numeral 19 is an insulator coating provided so as to cover most of the charging side arc horn 8 while leaving a part of the tip thereof.

The insulator shield plate 1 is attached by fitting the insulator mounting hole 2 of the insulator shield plate 1 into the insulator lower end portion 11a of the arrester 11. The outer diameter R of the insulating shield plate 1 is made larger than the outer diameter of the lightning arrestor, and is formed in a peripheral shape so that the nesting material wire or the like does not come into contact with the arc horn 8 on the electricity application side even if it hangs down from the metal fitting above the lightning arrester. The insulating shield plate 1 may be attached not only at one position at the lower end of the lightning arrestor but also at an intermediate portion or the like as required for the attachment position and the number of attachments.

Even if the insulating shield plate 1 is attached as described above,
The nesting material wire A etc. carried by the beak with the bird B stopped on the armrest part 4 and the overhanging metal piece 14 above the hanging insulator string 5 hangs downward and its lower part hits the peripheral edge part 3 of the insulating shield plate 1. Since it may be possible to hang down outward and come into contact with the long power-supply side arc horn 8, providing the insulator coating 19 on the power-supply side arc horn 8 prevents ground faults on the power supply side. In this way, if the insulating shield plate 1 is attached to the lightning arrester 11 side and the insulator coating 19 is used as a cover that is slightly shorter than the total length of the charging side arc horn 8 to expose the horn tip, the gap discharge electrode at the lower end of the lightning arrester 11 is exposed. Since the insulating shield plate 1 and the insulator coating 19 do not block the discharge gap Z2 between the power supply side arc horn 13 and the charging side arc horn 8, the function of the arrester is not impaired.

FIG. 5 shows an embodiment in which the above-mentioned insulating shield plate 1 is attached to the jumper wire insulating suspension in which a lightning arrester with a gap of a tension tower is installed, as seen from the longitudinal direction of the transmission line.
Shows the upper surface of the upper attachment member, 4 is the main material of the armor of the tower, 15 is the tension plate, 16 is the arrester mounting plate, 17 is the long insulator, 18 is the lower end of the long insulator 17 An arc horn, 9 is a suspension clamp, 20 is a jumper wire, 11 is a lightning arrester attached to a mounting plate 16, and 13 is a gap discharge electrode at the lower end of the lightning arrester 11.

The insulator shield hole 1 of the lightning arrester 11 is fitted into the insulator attachment hole 2 of the insulation shield plate 1 to attach the insulation shield plate 1 as shown by 1A, and the top end of the insulator insulator 17 at the top end. Also attach the insulating shield plate 1 to the portion 17b as in 1B. The insulating shield plates 1A and 1B have an outer diameter R larger than the outer diameters of the lightning protection insulator and the long insulator.
As for the mounting position and the number of mounting, the lightning protection may be mounted not only at each of the lower end of the lightning insulator and the upper end of the trunk insulator, but also at an intermediate portion between them.

By attaching the insulating shield plate 1 as described above, even if the bird B stops on the arm 4 and the plates 15 and 16 and the nesting material wire A etc. carried by the beak hangs downward, the wire A etc. The lower part of the insulating shield plates 1A, 1B contacts the peripheral edge portion 3 of the insulating shield plates 1A, 1B and hangs outward from the peripheral edge portion 3 and does not contact the electricity applying portion.

FIG. 7 shows an embodiment in which the jumper wire 20 is insulation-coated in order to enhance the ground fault prevention effect in the above-mentioned jumper wire insulating suspension part, and like FIG. , 17 is a long insulator, 11 is a lightning arrester indicated by a dotted line behind the long insulator 17, 18 is a charging side arc horn at the lower end of the long insulator 17, and the lower end of the long insulator 17 is Attach the insulating shield plate 1 of. 9 is a suspension clamp for the jumper wire, and 20 is a jumper wire.

An insulating coating 21 is provided on the jumper wire 20. In the suspended portion of the 66-77 KV jumper wire, when the insulation-coated jumper wire 20 is directly grasped by the suspension clamp 9, tracking is caused by surface leakage current and the insulation coating is destroyed, and rainwater or the like enters this part. The wires may be corroded abnormally or TV noise may be generated.Therefore, the insulation clamp 21 of the insulation jacket jumper wire is stripped of the insulation jacket 21 to provide the exposed portion 20a of the jumper wire 20. The portion 20a is grasped by the suspension clamp 9 and suspended.

Since the jumper wire 20 is covered with the insulating coating 21, even if the nesting material wire A of the bird B stopped on the arm member 4 hangs down, the jumper wire 20 will not be charged. Since there is no direct contact, a ground fault is prevented. Further, by holding the jumper wire exposed portion 20a from which the insulation coating 21 of the suspension clamp gripping portion is peeled off by the suspension clamp 9, tracking of the insulation coating in the suspension clamp gripping portion is surely prevented.

Further, the insulating shield plate 1 attached to the lower end portion of the long insulator 17 above the jumper wire exposed portion 20a is the nesting material wire of the bird B stopped on the arm portion 4 as in the above-mentioned embodiments. When A etc. hangs downward, the insulating shield plate 1
Since it is hung down toward the outer side at the periphery of the wire, the wire A of the nesting material does not come into contact with the exposed portion 20a of the jumper wire.

The insulating shield plate 1 attached to the insulator portion of each of the above-described embodiments is not limited to one, but may be provided at least at one or more places. Further, the shape of the insulating shield plate 1 is not limited to the above-mentioned circular shape, but may be formed in an appropriate shape capable of preventing an oval or other nesting material from coming into contact with the current-carrying conductor. The structure of the portion where the insulating shield plate 1 is attached to the insulator is not limited to the above-described configuration, but can be appropriately configured by adding an attachment fixing member.

[0032]

As described above, the bird damage prevention device for the insulated suspension of the power transmission line of the present invention is applied to the insulators such as suspension insulators, long-distance insulators, lightning-insulators, etc., which are suspended vertically from the steel tower. Since the insulating shield plate having a larger outer diameter is attached, even if the wire or the like of the bird nesting material hangs down, it is possible to prevent the wire from contacting the conductor portion on the power supply side and prevent a ground fault.

In addition, since the jumper wire in the suspension part for insulating the jumper wire is insulated and the exposed part of the jumper wire is held by the suspension clamp, even if the wire of the nesting material hangs downward, it does not come into direct contact with the jumper wire. It is possible to prevent a entanglement accident, and to prevent a bird damage accident without occurrence of tracking in the suspension clamp grip portion.

Further, since the arc horn on the power supply side is insulation-coated so that the tip is exposed, even if the nesting material wire or the like hangs down and touches the horn, a ground fault can be prevented.

Further, by installing the insulating shield plate as described above and providing the insulator coating on the arc horn on the voltage applying side, it is possible to more reliably prevent the nesting material wire or the like from contacting the voltage applying conductor. Even if it contacts the horn, a ground fault can be reliably prevented.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of an embodiment of an insulating shield plate of the present invention.

2 is a bottom view of the insulating shield plate of FIG. 1. FIG.

FIG. 3 is a front view of an example in which an insulating shield plate is attached to a suspension insulator device provided with a gap type lightning arrester.

FIG. 4 is a front view of another embodiment in which an insulating shield plate is attached to a suspension insulator device provided with a gap type lightning arrester.

FIG. 5 is a front view of an embodiment in which an insulating shield plate is attached to a jumper wire portion where a lightning arrester with a gap is installed.

6 is a top view of the upper mounting member of FIG.

FIG. 7: 1 of the present invention in a jumper wire insulation suspension
Front view of the embodiment

FIG. 8 is a diagram showing a conventional example.

[Explanation of symbols]

1; Insulation shield 5, 11, 11a, 17, 17b; insulator 9; Suspension clamp 19; Insulator coating on the charging horn 20; the jumper line 20a; exposed part of the jumper wire 21; Insulating coating of jumper wire

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Akio Mineyama             20 Kitakanzan, Otakamachi, Midori-ku, Nagoya-shi, Aichi             No. 1 Chubu Electric Power Co., Inc.             Inside the technical laboratory (72) Inventor Takeo Munakata             2-6-1, Marunouchi, Chiyoda-ku, Tokyo             Kawa Electric Industry Co., Ltd. (72) Inventor Yoshiyuki Koike             2-6-1, Marunouchi, Chiyoda-ku, Tokyo             Kawa Electric Industry Co., Ltd. (72) Inventor Sadahiko Tanaka             2-6-1, Marunouchi, Chiyoda-ku, Tokyo             Kawa Electric Industry Co., Ltd.

Claims (3)

[Claims] 1. A bird damage prevention device for a power line insulation hanging part, wherein an insulator shielding plate having an outer diameter larger than an insulator outer diameter is attached to an insulator suspended from a steel tower. 2. An insulating coating is provided on the jumper wire in the jumper wire insulating suspension part, and an exposed portion of the jumper wire with the insulating coating peeled off is provided at a suspension clamp gripping portion of the jumper wire, and the exposed portion of the jumper wire is suspended by a suspension clamp. A bird damage prevention device for an insulated suspension part of a power transmission line, characterized by being gripped and suspended. 3. A bird damage prevention device for a power line insulation suspension, comprising a lightning arrester, which is provided with a part of a tip of a power-supply-side horn remaining and covered with an insulator.