JP5412564B1 - Bird damage control device for overhead electric wires - Google Patents

Abstract

An object of the present invention is to prevent the occurrence of a ground fault by birds and beasts while suppressing the corrosion of an overhead electric wire.
An insulative tubular portion that is provided with a first opening in the trunk and is mounted so as to cover the periphery of the overhead electric wire, and a second opening is provided in the trunk to cover at least the first opening. An insulating exterior portion provided on the body portion of the tubular portion, and between the tubular portion and the exterior portion, and between the tubular portion and the overhead wire installed in the overhead wire Each gap is provided, and the first opening and the second opening are arranged at positions that do not overlap each other.
[Selection] Figure 1

Description

  The present invention relates to a bird damage countermeasure device for an overhead wire that prevents a ground fault of the overhead wire due to birds and beasts.

  Overhead electric wires may cause ground faults due to birds and beasts. In particular, there are jumper wires in the vicinity of the steel tower that supports the overhead electric wires. For this reason, ground faults will occur if birds that have stopped on the jumper line touch the steel tower, or if a wire or other material that is contained in the nesting material brought into the steel tower touches the jumper line. There was a thing.

  In order to prevent such a ground fault accident, for example, for an overhead electric wire that has an insulating insulation around the overhead wire, such as a jumper wire, or an insulation tape, to improve the insulation of the overhead wire Many bird damage countermeasure devices have been proposed (see, for example, Patent Documents 1 to 5). Some of them have a configuration in which a gap for discharging rainwater or the like is provided so that rainwater or the like accumulates in the insulating cover or the insulating tape and the overhead electric wire does not corrode.

JP 2004-072809 A Japanese Patent No. 2871944 JP 2003-284227 A Utility Model Registration No. 2578906 JP 2000-092672 A

  However, even if a gap for discharging rainwater or the like is provided in the bird damage countermeasure device, it may take time to discharge rainwater or the like, and rainwater or the like may remain in the device. In addition, many conventional bird damage countermeasure apparatuses do not have a configuration for discharging rainwater or the like, and rainwater is not discharged at all and sometimes accumulates in the apparatus. For this reason, it has been difficult to reliably suppress the corrosion of the overhead electric wire.

  The objective of this invention is providing the bird damage countermeasure apparatus for overhead wires which can prevent generation | occurrence | production of the ground fault by birds and beasts, suppressing the corrosion of overhead wires.

According to a first aspect of the invention,
An insulative tubular portion provided with a first opening in the body and mounted so as to cover the periphery of the overhead electric wire;
A body portion including a second opening, and an insulating exterior portion provided on the body of the tubular portion so as to cover at least the first opening; and
A predetermined gap is provided between the tubular portion and the exterior portion, and between the tubular portion and the overhead electric wire in a state of being attached to the overhead electric wire,
There is provided an aerial wire bird damage countermeasure device in which the first opening and the second opening are arranged at positions that do not overlap each other.

According to a second aspect of the invention,
In the state of being attached to the overhead electric wire, the exterior portion is disposed below the tubular portion, and the first portion
The bird damage countermeasure apparatus for overhead electric wires according to the first aspect, in which the position of the center of gravity is adjusted so that the opening and the second opening face downward.

According to a third aspect of the invention,
The bird's damage countermeasure device for overhead electric wires according to the first or second aspect, in which a groove that communicates with the second opening is formed in the longitudinal direction on the inner wall surface of the exterior portion.

According to a fourth aspect of the invention,
The bird damage countermeasure device for overhead electric wires according to any one of the first to third aspects, in which at least the first opening is formed elongated in the longitudinal direction of the tubular portion.

According to a fifth aspect of the present invention,
The bird's damage countermeasure device for overhead wires according to any one of the first to fourth aspects, in which the distance between the outer edge of the first opening and the outer edge of the second opening is 100 mm or more and 1000 mm or less. .

According to a sixth aspect of the present invention,
The bird's damage countermeasure device for overhead wires according to any one of the first to fifth aspects, wherein the distance between the tubular portion and the overhead wire, which is attached to the overhead wire, is 3 mm to 30 mm. Is provided.

According to a seventh aspect of the present invention,
The tubular portion includes a cleaving portion that cleaves the tubular portion along the longitudinal direction,
The aerial wire bird damage countermeasure device according to any one of the first to sixth aspects is provided, wherein the cleaving portion includes a double coupling mechanism configured by a fitting that can be freely coupled and released.

According to an eighth aspect of the present invention,
The tubular portion and the exterior portion are integrally formed by extrusion molding of an insulating material,
The bird's damage countermeasure device for overhead wires according to the seventh aspect in which a gap between the tubular portion and the exterior portion is formed by connecting the double coupling mechanisms to each other.

According to a ninth aspect of the present invention,
The bird damage countermeasure apparatus for overhead electric wires according to any one of the first to eighth aspects, which is formed of silicone rubber having a thickness of 2 mm to 10 mm.

  ADVANTAGE OF THE INVENTION According to this invention, the bird damage countermeasure apparatus for overhead wires which can prevent generation | occurrence | production of the ground fault by birds and beasts, suppressing the corrosion of overhead wires.

BRIEF DESCRIPTION OF THE DRAWINGS (a) is a perspective view of the bird damage countermeasure apparatus for overhead electric wires which concerns on one Embodiment of this invention, (b) is a longitudinal cross-sectional view of the bird damage countermeasure apparatus for overhead wires, (c) is for overhead electric wires It is a top view of the 1st opening part with which a bird damage countermeasure apparatus is equipped, (d) is a top view of the 2nd opening part with which the bird damage countermeasure apparatus for overhead wires is equipped. BRIEF DESCRIPTION OF THE DRAWINGS It is a cross-sectional view of the bird damage countermeasure apparatus for overhead electric wires which concerns on one Embodiment of this invention, Comprising: (a)-(c) is the 1st lock mechanism with which the bird damage countermeasure apparatus for overhead wires is equipped, and the 2nd lock mechanism Shows how is gradually released. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the mode of the discharge | emission of the water in the bird damage countermeasure apparatus for overhead wires which concerns on one Embodiment of this invention, (a) is a longitudinal cross-sectional view of the bird damage countermeasure apparatus for overhead wires, (b) (A) is AA sectional drawing, (c) is BB sectional drawing of (a). (A) is a perspective view of the bird damage countermeasure apparatus for overhead electric wires which concerns on a prior art, (b) is a cross-sectional view of the bird damage countermeasure apparatus for overhead wires. (A) is a figure which shows the mode of a steel tower periphery provided with a jumper apparatus, (b) is a figure of the jumper apparatus provided in the steel tower, (c) is a cross-sectional view of a jumper wire.

<Knowledge obtained by the present inventors>
As described above, by attaching an insulating covering around the overhead wires such as jumper wires, the insulation of the overhead wires is partly provided, and ground faults caused by birds and beasts and their nesting materials are prevented. Can be prevented. On the other hand, some measures are taken so that rainwater or the like does not collect in these devices.

  For example, Patent Document 1 described above describes an electric wire protective cover formed by extrusion molding of silicone rubber. In order to facilitate the winding work on the electric wire, the electric wire protection cover has curved portions extending at both ends in the width direction, and the curved portion is formed in a curved surface whose inner peripheral surface corresponds to the outer peripheral surface of the electric wire. ing.

  Further, for example, Patent Document 2 describes a bird harm prevention jumper device in which an insulating sheet provided with serrated ridges in the longitudinal direction is wound around a jumper wire. At this time, the intermediate portion between the insulating sheet and the jumper wire is lifted upward by the insulator series so that rainwater flows down and does not stay.

  Further, for example, in Patent Document 3, in order to suppress damage to an overhead wire around which an optical cable is wound, a plurality of ring-like fixing bodies attached to the outer periphery of the overhead wire with a predetermined interval and an adjacent ring-like fixing A bird harm prevention apparatus is described that includes a cylindrical rotating body that is rotatably mounted by being engaged with the outer periphery of the ring-shaped fixed body across the body.

  Further, for example, Patent Literature 4 describes a bird harm prevention insulating device in which an insulating sheet is wound in a cylindrical shape around a transmission line portion in the vicinity of a support point of a jumper wire or a suspension tower. At this time, a gap for rainwater drainage is formed between the inner peripheral surface of the cylindrical insulating sheet and the jumper wire or the power transmission line.

  For example, Patent Document 5 describes an insulating cover in which a cylindrical insulator that prevents contact between the nesting material and the electric wire is placed on the outer periphery of the electric wire. At this time, an insulating space is formed between the inner surface of the cylindrical insulator and the outer surface of the electric wire, and a ground fault is suppressed even if the nesting material is in contact with the cylindrical insulator. Further, for example, a cylindrical insulator is divided into two structures, and rainwater is discharged from a gap between the lower mating portions.

  However, according to the present inventors, in any of the configurations according to the prior art, rainwater or the like may not be sufficiently discharged, and it may be difficult to reliably suppress the corrosion of the overhead electric wire. is there.

  For example, as in Patent Documents 1 and 2, in the configuration in which the protective cover and the insulating sheet are wound around the overhead electric wire without a gap, as shown in FIG. 4, for example, the jumper wire 50j is always in contact with the insulating sheet 21 or the like. ing. Therefore, when rainwater or the like accumulates in the insulating sheet 21, at least a part of the jumper wire 50j is immersed in the water Wt. In Patent Document 2, the insulating sheet is lifted to flow down rainwater, but it takes a long time for water to be discharged through the insulating sheet wound without gaps, and a part of the insulating sheet remains. There are cases where it ends up.

  Further, as in Patent Documents 3 to 5, even if a gap is provided between the cylindrical rotating body or the cylindrical insulator and the overhead electric wire, if the gap is filled with accumulated water, the overhead electric wire is It will be flooded. In Patent Document 5, rainwater is discharged from the gap between the mating portions of the cylindrical insulator, but it takes a long time for water to drain through the narrow gap between the mating portions fixed by the fasteners. In some cases, some may remain.

  Thus, if an overhead electric wire continues to be in contact with moisture for a long period of time, corrosion tends to proceed. Moisture such as rainwater may contain corrosive substances. Specifically, in the overhead electric wires installed in the coastal vicinity and industrial areas, it is caused by sea salt particles, sulfur oxide (SOx) gas, nitrogen oxide (NOx) gas, etc. present in the surrounding environment. It is known that corrosion of overhead electric wires is promoted. Even in other areas, corrosion may be accelerated by the influence of acid rain. When an overhead electric wire corrodes, it will become difficult to supply electric power stably. If corrosion further progresses, the overhead electric wire may break and power transmission may be interrupted.

  The present inventors investigated and analyzed in detail the actual state of corrosion in an actual environment for the purpose of preventing the occurrence of ground faults caused by birds and beasts while suppressing the corrosion of overhead electric wires. Furthermore, based on the investigation results, the structure of the bird damage countermeasure device for overhead electric wires, the insulating material constituting the device, the thickness thereof, and the like were specified, and the present invention was achieved. The present invention is based on these findings found by the inventors.

<One Embodiment of the Present Invention>
A bird damage countermeasure apparatus for overhead wires according to an embodiment of the present invention is configured to be mounted around an overhead wire to prevent a ground fault of the overhead wire caused by birds and beasts. An overhead electric wire includes, for example, a jumper wire. The bird damage countermeasure device for overhead electric wires is applied to such jumper wires, for example. FIG. 5 shows a jumper device 150 including a jumper line 50j. (A) of FIG. 5 is a figure which shows the mode of the steel tower 100 periphery provided with the jumper apparatus 150, (b) is a figure of the jumper apparatus 150 provided in the steel tower 100, (c) is a jumper wire. It is a cross-sectional view of 50j.

  In the jumper device 150 shown in FIG. 5B, the overhead electric wire 50 is pulled from both sides of the steel tower 100 to the arm metal 103 of the steel tower 100 by the retaining clamp 101 and the insulator linkage device 102. A jumper wire 50j is connected between the holding clamps 101 on both sides of the steel tower 100 via a jumper terminal 104. The jumper wire 50j is a conductor having the same configuration as that of the overhead electric wire 50, and includes, for example, a plurality of steel core wires 50c and a plurality of aluminum strands 50a surrounding the periphery thereof, as shown in FIG.

(1) Configuration of Overhead Electric Wire Bird Damage Countermeasure Device Hereinafter, an overhead electric wire bird damage countermeasure device mounted on the jumper wire 50j and the like will be described with reference to FIG. 1 and FIG.

  1A is a perspective view of an aerial wire bird damage countermeasure apparatus 10 (hereinafter also referred to as a bird damage countermeasure apparatus 10) according to the present embodiment, and FIG. 1B is a longitudinal sectional view of the bird damage countermeasure apparatus 10. FIG. (C) is a top view of the 1st opening part with which the bird damage countermeasure apparatus 10 is equipped, (d) is a top view of the 2nd opening part with which the bird damage countermeasure apparatus 10 is equipped. FIG. 2 is a cross-sectional view of the aerial wire bird damage control apparatus 10 according to the present embodiment, wherein (a) to (c) are the first lock mechanism 13 and the second lock provided in the bird damage countermeasure apparatus 10. A state in which the mechanism 14 is gradually released is shown.

(Overall structure)
As shown in FIG. 1, the overhead wire electric bird damage countermeasure apparatus 10 includes an insulating tubular portion 11 that is mounted so as to cover the periphery of a jumper wire 50 j included in the overhead wire 50. A plurality of first openings 11h are provided, for example, at predetermined intervals in the body of the tubular portion 11 having a predetermined length.

  Further, the bird damage countermeasure apparatus 10 includes an insulating exterior portion 12 provided on the body portion of the tubular portion 11 so as to cover the first opening portion 11h. The exterior part 12 is configured to have substantially the same length as the tubular part 11, for example, and covers the entire length of one outer wall surface of the body part of the tubular part 11. A plurality of second openings 12h are provided in the body portion of the exterior portion 12 at a predetermined interval, for example. A predetermined gap 12g is provided between the tubular portion 11 and the exterior portion 12.

  The tubular portion 11 is supported by the installed jumper wire 50j and is configured to be attached to the jumper wire 50j in a suspended state. A predetermined gap 11g is provided between the tubular portion 11 and the jumper wire 50j below the tubular portion 11 in a state of being attached to the jumper wire 50j. The size of the gap 11g, that is, the distance between the tubular portion 11 and the jumper wire 50j is 3 mm or more and 30 mm or less.

  By setting the distance between the tubular portion 11 and the jumper wire 50j to be 3 mm or more, the contact between the water accumulated in the tubular portion 11 and the jumper wire 50j can be sufficiently suppressed. Moreover, it can suppress that the wind pressure load added to the jumper wire 50j with which the bird damage countermeasure apparatus 10 was mounted | worn by setting this distance to 30 mm or less remarkably increases.

  Further, in the bird damage countermeasure apparatus 10, the position of the center of gravity is adjusted, for example, the center of gravity is approaching the exterior portion 12 side. For this reason, in the state attached to the jumper wire 50j, the exterior part 12 is suspended below the tubular part 11, and the first opening part 11h and the second opening part 12h are configured to face downward. .

  Moreover, the bird damage countermeasure device 10 is formed by, for example, extrusion molding of an insulating material, and the tubular portion 11 and the exterior portion 12 are integrally configured. The insulating material constituting the bird damage countermeasure apparatus 10 is a flexible rubber having excellent weather resistance and insulating properties, such as silicone rubber and ethylene propylene rubber.

  Moreover, it is preferable that the insulating material which comprises the bird damage countermeasure apparatus 10 is a transparent or translucent insulating rubber, for example. Thereby, the bird damage countermeasure apparatus 10 has visibility from the outside, and the amount of water accumulated in the bird damage countermeasure apparatus 10 from the outside can be confirmed.

  The thickness of the tubular portion 11 made of an insulating material such as insulating rubber is, for example, 2 mm or more and 10 mm or less. Moreover, the thickness of the exterior part 12 is 2 mm or more and 10 mm or less, for example, More preferably, it is 2 mm or more and 7 mm or less. If the thickness of the tubular part 11 and the exterior part 12 is 2 mm or more, good insulation is obtained, and the possibility of penetration due to external damage or the like is reduced. Moreover, if thickness is 10 mm or less, the bird damage countermeasure apparatus 10 can be comprised lightweight, and cost can be held down. Workability is also improved. In the exterior part 12, workability can be further improved by making thickness into 7 mm or less.

  Further, the bird damage countermeasure apparatus 10 includes a first lock mechanism 13 as a first connection mechanism and a second lock mechanism 14 as a second connection mechanism in the vicinity of both ends of the exterior portion 12 in the short direction. The first lock mechanism 13 and the second lock mechanism 14 will be described later.

(First opening and second opening)
As shown in FIG.1 (b), the 1st opening part 11h and the 2nd opening part 12h are arrange | positioned in the position which does not mutually overlap. That is, in the longitudinal cross section of the bird damage countermeasure apparatus 10, they are arranged so as not to overlap each other in the direction perpendicular to the longitudinal direction of the apparatus. In other words, the projection of the first opening portion 11h cast on the inner wall surface of the exterior portion 12 where the second opening portion 12h opens is arranged so as not to overlap the second opening portion 12h.

  At this time, the distance D between the outer edge of the first opening 11h and the outer edge of the second opening 12h is, for example, not less than 100 mm and not more than 1000 mm. That is, the distance D is a distance in which the outer edge of the first opening portion 11h and the outer edge of the second opening portion 12h are separated in the longitudinal direction of the device in the longitudinal section of the bird damage countermeasure apparatus 10. In other words, the distance D is the distance between the outer edge of the first opening 11h and the outer edge of the second opening 12h projected on the inner wall surface of the exterior part 12 where the second opening 12h opens.

  Thus, by setting the distance D to be 100 mm or more, it is possible to suppress a decrease in insulation due to the provision of the first opening 11h and the second opening 12h. Therefore, even when the bird damage countermeasure apparatus 10 is soiled or placed in a humid environment, for example, creeping discharge that runs from outside the second opening 12h to the jumper line 50j is sufficiently suppressed. be able to. In addition, by setting the distance D to 1000 mm or less, drainage inside the bird damage countermeasure apparatus 10 can be reliably performed, and corrosion of the jumper wire 50j equipped with the bird damage countermeasure apparatus 10 can be suppressed. .

  Moreover, as shown in FIG.1 (c), the 1st opening part 11h is formed elongate in the longitudinal direction of the tubular part 11, for example. The shape of the first opening 11h is, for example, an ellipse. Or a rectangle and other polygons may be sufficient. At this time, the length in the longitudinal direction of the first opening 11h is, for example, 20 mm or more and 500 mm or less. By setting the length of the first opening portion 11h to 20 mm or more, the first opening portion 11h is not easily blocked by dust or dirt around the bird damage countermeasure apparatus 10. Moreover, the deformation | transformation by the shape loss etc. of the bird damage countermeasure apparatus 10 can be suppressed because length is 500 mm or less.

  As shown in FIG. 1D, the second opening 12h is formed to be elongated in the longitudinal direction of the exterior part 12, for example. Further, a groove 12v communicating with the second opening 12h, for example, is formed on the inner wall surface of the exterior part 12. For example, the groove 12v extends in the longitudinal direction of the exterior portion 12. The shape of the cross section of the groove 12v is, for example, a V shape or a U shape.

(First connection mechanism and second connection mechanism)
As described above, the overhead wire electric bird damage countermeasure apparatus 10 includes, for example, the first lock mechanism 13 as the first connection mechanism and the second lock mechanism 14 as the second connection mechanism. The first lock mechanism 13 and the second lock mechanism 14 will be described with reference to FIG.

  As shown in FIG.2 (c), the tubular part 11 is provided with the cleaving part 11c which cleaves the tubular structure of the tubular part 11 along a longitudinal direction, for example. That is, the tubular portion 11 includes a cleavage portion 11c configured by both ends in the short direction facing each other. The tubular portion 11 is configured to be openable and closable by the cleavage portion 11c. Moreover, the exterior part 12 is equipped with the structure integral with the tubular part 11 by which the end of the transversal direction was joined seamlessly to the end of the tubular part 11, and the other end was open | released.

The first locking mechanism 13 is configured by a cleaving portion 11c of the tubular portion 11, that is, a fitting that can be freely connected and released provided in the longitudinal direction along both ends in the lateral direction. Specifically, the first locking mechanism 13 includes a fitting groove 13 c having flexibility at one end of the tubular portion 11 on the side to be joined to the exterior portion 12. The first lock mechanism 13 includes a fitting protrusion 13p having flexibility at the other end of the tubular portion 11. When the fitting protrusion 13p is pushed into the fitting groove 13c, as shown in FIG. 2B, the first lock mechanism 13 is locked (connected), and the tubular portion 11 is closed. Further, if the fitting protrusion 13p is removed from the fitting groove 13c, as shown in FIG. 2C, the first lock mechanism 13 is released (released),
The tubular portion 11 is in an open state.

  Further, as shown in FIG. 2A, the second lock mechanism 14 is provided at a position that is substantially symmetrical with the first lock mechanism 13 with respect to the central axis of the cross section of the bird damage countermeasure apparatus 10, for example. Yes. The central axis of the cross section of the bird damage countermeasure apparatus 10 is an axis that passes through the centers of the tubular portion 11 and the exterior portion 12 that are respectively disposed at the upper and lower positions in a state of being attached to the jumper wire 50j.

  Specifically, the second lock mechanism 14 includes a fitting groove 14 c having flexibility at a position that is substantially symmetrical with the first lock mechanism 13 on the outer wall surface of the tubular portion 11. The second lock mechanism 14 includes a fitting protrusion 14p having flexibility at the other end of the exterior portion 12 on the released side. As shown in FIGS. 2A and 2B, the second lock mechanism 14 is configured to be freely connected and released by fitting the fitting groove 14c and the fitting protrusion 14p.

  As described above, when the first locking mechanism 13 and the second locking mechanism 14 are arranged substantially symmetrically with respect to the central axis, the bird damage countermeasure device 10 attached to the jumper wire 50j is viewed in a cross section. Thus, the first opening 11h and the second opening 12h can be directed downward more reliably.

  The gap 12g between the tubular portion 11 and the exterior portion 12 is formed by connecting the first lock mechanism 13 and the second lock mechanism 14 to each other. At this time, the cleavage portion 11 c of the tubular portion 11 is included in the internal space of the bird damage countermeasure apparatus 10 configured by the tubular portion 11 and the exterior portion 12. As described above, the cleaving portion 11 c of the tubular portion 11 includes a double coupling mechanism including the first lock mechanism 13 and the second lock mechanism 14.

  As described above, the bird damage countermeasure apparatus 10 including the tubular portion 11 and the exterior portion 12 that are integrally formed is formed by extrusion molding of an insulating material or the like as described above. At the time of extrusion molding, for example, when the tubular portion 11 and the exterior portion 12 are viewed in the cross section, the first lock mechanism 13 and the second lock mechanism 14 are released toward the respective inner wall surfaces. Molded into a bent shape. The 1st opening part 11h and the 2nd opening part 12h are formed by punching etc. to the extruded molded product.

(2) Mounting Method of Overhead Electric Wire Bird Damage Countermeasure Device Next, the mounting method of the overhead wire electric bird damage countermeasure device 10 to the jumper wire 50j and the like will be described mainly with reference to FIG.

  The bird damage countermeasure apparatus 10 is mounted on, for example, a jumper line 50j that has already been installed. In mounting on the jumper wire 50j, first, the first lock mechanism 13 and the second lock mechanism 14 are both released (released). That is, the state shown in FIG.

  Next, the cleavage part 11c of the tubular part 11 in the released state is pushed open, and the jumper line 50j is pushed into the tubular part 11 so that the periphery of the jumper line 50j is covered with the tubular part 11. When the jumper wire 50j is inserted over the entire length of the tubular portion 11 having a predetermined length, the fitting protrusion 13p is pushed into the fitting groove 13c to lock (connect) the first locking mechanism 13. That is, the state shown in FIG. At this time, the fitting groove 13c of the first lock mechanism 13 is filled with an adhesive such as room temperature curable silicone rubber.

Subsequently, the fitting protrusion 14p is pushed into the fitting groove 14c, and the second locking mechanism 14 is locked (connected). That is, the state shown in FIG. At this time, the fitting groove 14c of the second lock mechanism 14 is filled with an adhesive such as a room temperature curable silicone rubber. Thus, the space | gap 12g between the tubular part 11 and the exterior part 12 is formed by setting it as the state which connected the double connection mechanism of the 1st lock mechanism 13 and the 2nd lock mechanism 14, respectively. In addition, the cleaved portion 11 c of the tubular portion 11 has a shape taken into the internal space of the bird damage countermeasure apparatus 10 configured by the tubular portion 11 and the exterior portion 12.

  Further, through the steps so far, the tubular portion 11 is supported by the erected jumper wire 50j and is suspended. Moreover, the exterior part 12 will be in the state suspended from the tubular part 11, and the 1st opening part 11h and the 2nd opening part 12h face downward.

  Thereafter, the adhesive is dried and solidified by leaving for a predetermined time. Thereby, the 1st lock mechanism 13 and the 2nd lock mechanism 14 will be in the state connected more reliably.

  Thus, the mounting of the overhead wire electric bird damage countermeasure device 10 to the jumper wire 50j or the like is completed.

  Thus, since the bird damage countermeasure apparatus 10 includes the cleaving portion 11c, even the jumper wire 50j that has already been installed can be easily attached.

  Moreover, since the bird damage countermeasure apparatus 10 is provided with the fitting grooves 13c and 14c, it is easy to secure a portion for enclosing the adhesive, and the connection using the adhesive is easy.

  Further, by using the first lock mechanism 13 and the second lock mechanism 14 of the bird damage countermeasure apparatus 10 together with an adhesive, the connection is further strengthened.

  Further, since the bird damage countermeasure apparatus 10 includes the first lock mechanism 13 and the second lock mechanism 14, for example, the clamp is held until the adhesive is dried and solidified, or the clamp is removed after the adhesive is solidified. Such temporary fixing work is unnecessary. Thereby, efficiency of mounting work can be achieved.

  Moreover, since the bird damage countermeasure apparatus 10 includes the tubular portion 11 and the exterior portion 12 that are integrally formed, the tubular portion 11 and the exterior portion 12 are aligned at the site when mounted on the jumper wire 50j. Is unnecessary. Thereby, efficiency of mounting work can be achieved.

  Further, since the bird damage countermeasure device 10 is formed of a flexible insulating rubber or the like, it is easy to follow various forms according to the installation situation of the jumper wire 50j, and it is easy to attach to the jumper wire 50j. is there.

  Moreover, since the bird damage countermeasure apparatus 10 includes the tubular portion 11 bent toward the inner wall surface side, the jumper wire 50j can be more easily attached. Further, the connection by the first lock mechanism 13 is facilitated.

  Moreover, since the bird damage countermeasure apparatus 10 includes the exterior portion 12 that is bent toward the inner wall surface side, a gap 12g between the tubular portion 11 and the exterior portion 12 is easily secured. Further, the connection by the second lock mechanism 14 is facilitated. The groove 12v provided in the longitudinal direction of the inner wall surface of the exterior portion 12 also facilitates inward folding and the like, and this effect is more easily obtained.

  Moreover, since the bird damage countermeasure apparatus 10 includes the tubular portion 11 and the exterior portion 12 having a predetermined thickness or less as described above, the workability is further improved.

(3) Action of Bird Damage Countermeasure Device for Overhead Electric Wires By being configured as described above, the bird injury countermeasure device for overhead electric wires 10 has a predetermined action described below. Hereinafter, the drainage action and the ground fault prevention action of the overhead wire electric bird damage countermeasure apparatus 10 will be described with reference to FIG.

  FIG. 3 is a view for explaining a state of water discharge in the overhead wire electric bird damage countermeasure apparatus 10 according to the present embodiment, wherein (a) is a longitudinal sectional view of the bird damage countermeasure apparatus 10, and (b). (A) is AA sectional drawing, (c) is BB sectional drawing of (a).

(Drainage action)
Water Wt may infiltrate into gaps at both ends in the longitudinal direction due to precipitation such as rain or snow inside the overhead wire electric bird damage countermeasure apparatus 10 attached to the jumper wire 50j. The water Wt can also enter from the first opening 11h, the second opening 12h, and the like described above. However, the first opening 11h and the second opening 12h allow the water Wt to enter the bird damage countermeasure apparatus 10 as described below. As a result, corrosion of the jumper wire 50j and the like can be suppressed.

  As shown in FIG. 3, the first opening portion 11h and the second opening portion 12h are, for example, facing downward when mounted on the jumper wire 50j or the like. Such an arrangement is adjusted such that the center of gravity of the bird damage countermeasure apparatus 10 is close to the exterior portion 12 side, or the bird damage countermeasure apparatus 10 is configured substantially symmetrically with respect to the central axis. Is obtained.

  As shown in FIG. 3B, the water Wt that has entered the tubular portion 11 temporarily accumulates in the gap 11g between the tubular portion 11 and the jumper wire 50j below the tubular portion 11. Thereby, it is possible to prevent the jumper wire 50j from being immediately immersed in the water Wt due to the penetration of the water Wt into the tubular portion 11.

  Further, the accumulated water Wt is discharged from the first opening portion 11h provided in the tubular portion 11 and facing downward to the exterior portion 12 side. Therefore, it is possible to prevent water Wt from being accumulated in a gap 11g between the tubular portion 11 and the jumper wire 50j to a predetermined amount or more and the jumper wire 50j from being immersed.

  In addition, as described above, the discharge of the water Wt is further promoted by forming the first opening 11h to be elongated in the longitudinal direction. Increasing the size of the first opening increases the effect of discharging the water Wt, but the ease of discharging water may be different between the short side direction and the long side direction. That is, while the tubular portion 11 has a shape bent in the short direction, the periphery of the first opening 11 of the tubular portion 11 mounted at a predetermined position, such as near the center of the suspended jumper wire 50j, It can be in a state of being kept substantially horizontal in the longitudinal direction. Therefore, if the openings have the same size, the one that is elongated in the longitudinal direction may be advantageous for discharging the water Wt. In addition, the strength of the bird damage countermeasure apparatus 10 is easily maintained when the length is originally elongated in the longitudinal direction. At this time, as described above, the length of the first opening 11h in the longitudinal direction is set to, for example, 500 mm or less to suppress deformation of the bird damage countermeasure apparatus 10 and maintain the shape.

  As described above, the distance between the tubular portion 11 and the jumper wire 50j is set to 3 mm or more, for example. For this reason, until the water Wt is discharged from the first opening 11h, the gap 11g of a size sufficient to store the water Wt while avoiding contact between the jumper wire 50j and the water Wt is formed in the tubular portion 11. Secured. Moreover, as will be described later, the air permeability in the bird damage countermeasure apparatus 10 is also improved.

  As shown in FIG. 3C, the water Wt that has entered the exterior portion 12 due to precipitation or the like, and the water Wt that has been discharged from the tubular portion 11 and flowed in are temporarily stored in the tubular portion 11 and the exterior portion 12. It accumulates in the gap 12g. The accumulated water Wt is discharged to the outside of the bird damage countermeasure apparatus 10 from the second opening 12h provided in the exterior portion 12 and facing downward. As described above, the discharge of water is further promoted by configuring the second opening 12h to be elongated.

  Further, the accumulated water Wt is also guided to the second opening 12 by the groove 12v provided on the inner wall surface of the exterior portion 12, and the discharge of the water Wt is further promoted. As described above, the groove 12v of the exterior part 12 not only gives the exterior part 12 the above-described inward folding ease to facilitate the securing and connection of the gap 12g, but also has a predetermined drainage effect. .

  As described above, the first opening portion 11h and the second opening portion 12h face downward, so that the water Wt that has flowed downward along the inner wall surface of the tubular portion 11 or the exterior portion 12 is relatively quickly. In addition, the air is discharged from the first opening 11h and the second opening 12h to the outside of the bird damage countermeasure apparatus 10. Moreover, it is also suppressed that the water Wt due to precipitation permeates into the bird damage countermeasure apparatus 10 from the first opening 11h or the second opening 12h.

  Moreover, the effect | action of these structures of the bird damage countermeasure apparatus 10 is not restricted above.

  The jumper wires 50j and the like become high temperature during power application, and at least a part of the water Wt that has entered the bird damage countermeasure apparatus 10 may be in the state of water vapor. The water vapor flows through the gap 11g in the tubular part 11 and the gap 12g in the exterior part 12 and exhausts from the first opening part 11h, the second opening part 12h, or both ends in the longitudinal direction of the bird damage countermeasure apparatus 10. Is done.

  Moreover, the external air which flowed in from the both ends of the 1st opening part 11h, the 2nd opening part 12h, and the bird damage countermeasure apparatus 10 distribute | circulates water vapor | steam by flowing through the space | gap 11g in the tubular part 11, and the space | gap 12g in the exterior part 12. Emissions are further promoted. Moreover, ventilation in the bird damage countermeasure apparatus 10 is promoted, and the bird damage countermeasure apparatus 10 is easily kept dry.

  As described above, due to the action of the gap 11g in the tubular part 11, the gap 12g in the exterior part 12, the first opening part 11h, and the second opening part 12h, the invaded water Wt is protected against bird damage over a long period of time. 10 and the contact between the jumper wire 50j and the water Wt is suppressed.

  On the other hand, the 1st lock mechanism 13 and the 2nd lock mechanism 14 prevent permeation of the water Wt itself into the bird damage countermeasure apparatus 10 from at least the tubular portion 11 and the trunk portion (side surface) of the exterior portion 12.

  As described above, the cleavage part 11 of the tubular part 11 is included in the internal space of the tubular part 11 and the exterior part 12 formed by the first lock mechanism 13 and the second lock mechanism 14. That is, the cleaving portion 11c of the tubular portion 11 includes a double coupling mechanism including the first locking mechanism 13 and the second locking mechanism 14, thereby preventing water Wt from entering the cleaving portion 11c. can do.

  Moreover, the 1st lock mechanism 13 and the 2nd lock mechanism 14 are used together, for example with an adhesive agent etc., and enable more firm connection. Therefore, it is possible to prevent the intrusion of water Wt from the cleavage portion 11 c of the tubular portion 11 or the connection portion between the tubular portion 11 and the exterior portion 12.

  As described above, in the present embodiment, corrosion of the overhead electric wire 50 such as the jumper wire 50j can be suppressed, and power can be supplied stably. Further, it is possible to prevent breakage of the overhead electric wire 50 due to the progress of corrosion, and to avoid the occurrence of adverse effects such as interruption of power transmission.

(Earthquake accident prevention action)
On the other hand, the bird damage countermeasure apparatus 10 is primarily intended to prevent the occurrence of a ground fault due to contact with the jumper wire 50j of birds and beasts and nesting materials brought in by birds and beasts.

For example, if an opening or the like for promoting drainage is provided in the bird damage countermeasure apparatus, a bird's claw or the like stopped on the jumper wire 50j to which the bird damage countermeasure apparatus is mounted is inserted into the bird damage countermeasure apparatus from the opening. The jumper wire 50j may come into contact.

  However, in the bird's damage countermeasure device 10 for overhead electric wires, a double structure of the tubular portion 11 having the first opening portion 11h and the exterior portion 12 having the second opening portion 12h is provided, and further, the first opening portion 11h The second opening 12h is arranged so as not to overlap each other. Thereby, the contact with the jumper wire 50j by inserting a bird's claw or the like into the bird damage countermeasure apparatus 10 is prevented.

  At this time, the distance between the tubular part 11 and the jumper 50j, the distance between the tubular part 11 and the exterior part 12, the size and shape of the first opening part 11h and the second opening part 12h, the outer edge and the second of the first opening part 11h. The distance D with the outer edge of the opening 12h is designed not only to suppress the corrosion of the jumper wire 50j but also to suppress the contact of the birds and animals and their nesting material to the jumper wire 50j.

  It is also important to prevent ground faults by improving the insulation of the bird damage countermeasure device itself and suppressing the electric shock of birds and beasts that have touched the bird damage countermeasure device.

  In the overhead wire bird damage countermeasure apparatus 10, the arrangement and shape of each of the above components, the thickness of the bird damage countermeasure apparatus 10 maintain the insulation of the bird damage countermeasure apparatus 10 itself, and the birds and animals, their nesting materials, etc. Is designed to suppress electric shocks and the like when it comes into contact with the bird damage countermeasure device 10.

  For example, as described above, when the thickness of the tubular portion 11 and the exterior portion 12 is 2 mm or more, good insulating properties can be obtained. In addition, since penetration due to external damage or the like is suppressed, the risk of direct contact with the jumper wire 50j by birds and beasts can be reduced.

  Further, for example, as described above, the distance D between the outer edge of the first opening portion 11h and the outer edge of the second opening portion 12h is set to 100 mm or more and 1000 mm or less, so that the insulation of the bird damage countermeasure apparatus 10 and the jumper can be maintained. This is intended to suppress corrosion of the line 50j. That is, creeping discharge or the like in which discharge travels along the surface of the insulating exterior portion 12 or the like is less likely to occur, and the breakdown can be suppressed. In addition, since the drainage in the bird damage countermeasure apparatus 10 can be sufficiently performed, corrosion of the jumper wire 50j can be suppressed.

  As described above, in the present embodiment, it is possible to prevent the occurrence of a ground fault due to birds and beasts while suppressing the corrosion of the overhead electric wires 50 such as the jumper wires 50j.

<Other Embodiments of the Present Invention>
As mentioned above, although embodiment of this invention was described concretely, this invention is not limited to the above-mentioned embodiment, It can change variously in the range which does not deviate from the summary.

  For example, in the above-described embodiment, the exterior portion 12 covers the entire length of one outer wall surface of the body portion of the tubular portion 11, but the exterior portion only needs to cover at least the first opening.

  In the above-described embodiment, the bird damage countermeasure apparatus 10 is integrally configured by extrusion molding. However, the bird damage countermeasure apparatus 10 is not an integral structure, for example, a structure in which a tubular portion and an exterior portion are separated. May be. Moreover, you may manufacture by methods other than extrusion molding.

  Moreover, although the tubular part 11 and the exterior part 12 were provided with two or more 1st opening parts 11h and 2nd opening parts 12h in the above-mentioned embodiment, they should just be provided with one or more, respectively. Alternatively, the bird damage countermeasure apparatus having at least one opening may be used as one unit, and a plurality of units may be connected and attached to the overhead wire.

  In the above-described embodiment, the first opening portion 11h and the second opening portion 12h are directed downward. However, this is not limited as long as the prescribed creeping insulation property and drainage property are obtained. The openings may be arranged in different directions. As described above, the water Wt in the bird damage countermeasure apparatus 10 is often water vapor, and even if the first opening and the second opening are directed in directions other than downward, at least the discharge of the water vapor Is possible.

  In the above-described embodiment, the second opening 12h is provided with the groove 12v extending in the longitudinal direction as a peripheral structure, but is not limited to this configuration. The direction in which the groove 12v extends may be the short direction or other directions. Moreover, you may extend in several directions, such as the cross | cross (cross) centering on a 2nd opening part, and radial shape. Even with such a configuration, it is possible to obtain an action of guiding the water accumulated in the exterior portion to the second opening. Further, the second opening may not include such a groove. Moreover, the 1st opening part may be provided with the groove | channel.

  In the above-described embodiment, the bird damage countermeasure apparatus 10 includes the first lock mechanism 13 and the second lock mechanism 14, but the number of lock mechanisms may be one or may not be. As described above, the tubular portion can be bent so that the tube can be closed when no force is applied. The exterior part can also be configured such that both ends are joined to the tubular part. Thereby, a lock mechanism becomes unnecessary.

  In the above-described embodiment, the bird damage countermeasure apparatus 10 is attached to the already installed overhead electric wire 50. However, when the overhead electric wire 50 is installed, it may be attached at the same time. At this time, if the overhead electric wire 50 is inserted into the bird damage countermeasure apparatus in order from the end of the overhead electric wire 50, the configuration of the cleavage portion, the lock mechanism, or the like becomes unnecessary.

  In the above-described embodiment, the bird damage countermeasure apparatus 10 is mainly mounted on the jumper wire 50j. However, the bird damage countermeasure apparatus 10 can be used by being mounted on other parts of the overhead electric wire 50. .

  In the above-described embodiment, when the bird damage countermeasure apparatus 10 is mounted, an adhesive or the like is used to connect the first lock mechanism 13 and the second lock mechanism 14, but other methods such as welding are used. May be.

  Moreover, in the above-mentioned embodiment, although the insulating rubber which comprises the bird damage countermeasure apparatus 10 was transparent or translucent, it may be colored insulating rubbers, such as black, dark color, or dark color. By using colored rubber, the heat dissipation characteristics of the bird damage countermeasure device are enhanced, and it is possible to suppress the occurrence of high temperatures when power is applied to the overhead wires.

  Moreover, in the above-mentioned embodiment, the form etc. of the bird damage countermeasure apparatus 10 shown to each figure are an example to the last, Comprising: It is not limited to the form in each figure.

  That is, for example, the tubular portion may have an elliptical shape, a rhombus shape, a triangular shape, or other shapes as well as a substantially circular cross-sectional shape. The exterior portion 12 may have a V shape, a ship bottom shape (trapezoidal shape), or other cross-sectional shapes in addition to a gently curved shape.

  In addition to the vertical side wall, the first opening and the second opening have a tapered shape, a stepped shape, and a curved surface that gradually narrows toward the outer wall so that the accumulated water can be more easily discharged. Etc. may be included.

Moreover, the magnitude | size relationship between a 1st opening part and a 2nd opening part does not ask | require, or a 1st opening part and a 2nd opening part may be the same magnitude | size.

  Further, the first lock mechanism and the second lock mechanism have a spherical fitting protrusion and a spring property in addition to a fitting formed by a triangular fitting protrusion and a C-shaped groove having a narrow opening and a widened depth. A clip-type fitting protrusion, a U-shaped groove, or a fitting in which one or both have a hook shape may be used.

  Next, examples according to the present invention will be described together with comparative examples.

(1) Thickness of insulating member First, the bird damage countermeasure device for overhead electric wires according to Examples 1 to 4 and Comparative Examples 1 to 4 is manufactured, and the thickness of the insulating member (insulating material) constituting these bird damage countermeasure devices Evaluation was made.

(Configuration of bird damage countermeasure device for overhead electric wires)
All of the bird damage countermeasure devices are made of silicone rubber having a volume specific resistance of 5 × 10 ¹⁷ Ω · cm, the inner diameter of the tubular portion is 40 mm, and the inner diameter of the exterior portion is 20 mm. The distance between the outer edge of the first opening of the tubular part and the outer edge of the second opening of the exterior part was 200 mm.

  Moreover, the thickness of the silicone rubber of the bird damage countermeasure apparatus according to Examples 1 to 4 was set to 2.0 mm, 4.9 mm, 6.9 mm, and 9.8 mm, respectively. Moreover, the thickness of the silicone rubber of the bird damage countermeasure apparatus according to Comparative Examples 1 to 4 was set to 0.6 mm, 1.7 mm, 10.8 mm, and 13.5 mm, respectively.

(Insulation evaluation)
The insulation properties of these bird damage countermeasure devices were evaluated by measuring the dielectric breakdown voltage value.

With respect to each bird damage countermeasure device having a length of 6 m, the dielectric breakdown voltage value is measured by using an overhead electric wire having a length of 9 m, specifically, a steel core aluminum stranded wire (ACSR: ASR: 410 mm ² ). (Aluminum-stranded Conductors Steel Reinforced) was installed near the center, and the bird damage control device and the ACSR were kept horizontally.

  When mounting the bird damage countermeasure device on the ACSR, the fitting grooves of the first coupling mechanism and the second coupling mechanism are filled with room temperature curable silicone rubber as an adhesive, and then each coupling mechanism is fitted at room temperature. And left to join.

  In the measurement, the ACSR main body was connected to a high voltage electrode, and a metal bind wire was attached to the surface of the bird damage countermeasure apparatus, which was used as a ground electrode. Under the condition that the surface was not fouled and dried, an AC voltage was applied between the ACSR and the bird damage countermeasure device to increase the pressure to 5 kV, and then the pressure was increased stepwise while holding for another minute. At this time, the bird damage countermeasure device caused dielectric breakdown, and the voltage value when current flowed through the circuit was measured as the dielectric breakdown voltage value. About the obtained dielectric breakdown voltage value, the quality of insulation was determined on the basis of the ground voltage of the 77 kV transmission line.

(Evaluation of workability)
Moreover, each bird damage countermeasure apparatus was evaluated for workability (installability).

Specifically, the time required for mounting each bird damage countermeasure device was measured and the ease of mounting was investigated, and whether the workability was good or not was determined based on whether or not harmful effects could occur in the field work. The method for attaching the bird damage countermeasure device to the ACSR is as described above.

(Evaluation results)
The above evaluation results are shown in Table 1 below.

  First, the evaluation results of insulating properties will be described.

  In addition, in the item of “insulation” in Table 1, the insulation voltage of the 77 kV transmission line exceeding 44.5 kV, which is the ground voltage, was determined to be good (◯), and the insulation breakdown occurred before reaching 44.5 kV. The property was regarded as poor (x).

  As shown in Table 1, the dielectric breakdown voltage values of Examples 1 to 4 all exceeded the specified value, indicating that the insulation was good. Also, in Comparative Examples 3 and 4 in which the thickness of the silicone rubber was 2 mm or more, the dielectric breakdown voltage value satisfied the specified value. On the other hand, in Comparative Examples 1 and 2 in which the thickness of the silicone rubber was less than 2 mm, the dielectric breakdown voltage value was less than the specified value, resulting in insufficient insulation.

  Thus, it turned out that favorable insulation is acquired by setting the thickness of the silicone rubber in a bird damage countermeasure apparatus to 2 mm or more.

  Next, the evaluation results of workability will be described.

  In addition, in the item of “Workability” in Table 1, those that were judged to cause no harmful effects in the field work were judged as good (◎), and those that were judged to be capable of field work were judged as good (○). Those determined to be harmful in the work were defined as defective (x).

  The mounting of Examples 1 to 3 could be performed in a very short time, and no points that could cause adverse effects on the work were found. The same results were obtained for Comparative Examples 1 and 2. Further, in Example 4 in which the thickness of the silicone rubber was 9.8 mm, the ease of mounting was slightly reduced due to the increase in thickness, and the time required for mounting became longer. However, it was judged that field work was possible. On the other hand, in Comparative Examples 3 and 4 in which the thickness of the silicone rubber exceeds 10 mm, the mounting is inferior, and the mounting takes a very long time.

  Thus, it turned out that favorable workability is obtained by setting the thickness of the silicone rubber in the bird damage countermeasure apparatus to 10 mm or less. Moreover, about the exterior part, workability improved further in the thickness of 7 mm or less.

  As a result of comprehensive evaluation based on the above, it was found that the thickness of the insulating member such as silicone rubber of the bird damage countermeasure apparatus is preferably 2 mm or more and 10 mm or less.

(2) Distance between Tubular Part and Overhead Electric Wire Next, an aerial wire bird damage countermeasure device according to Examples 5 to 8 and Comparative Examples 5 to 8 is manufactured. That is, the distance from the ACSR was evaluated.

(Configuration of bird damage countermeasure device for overhead electric wires)
Each bird damage countermeasure device is made of silicone rubber having a volume resistivity of 5 × 10 ¹⁷ Ω · cm, the thickness of the silicone rubber of the tubular portion and the exterior portion is 4.4 mm, and the inner diameter of the exterior portion is 20 mm. did. The distance between the outer edge of the first opening of the tubular part and the outer edge of the second opening of the exterior part was 200 mm.

  Moreover, the internal diameter of the tubular part of the bird damage countermeasure apparatus which concerns on Examples 5-8 was 31.5 mm, 37.0 mm, 48.0 mm, and 57.0 mm, respectively. Moreover, the internal diameter of the tubular part of the bird damage countermeasure apparatus which concerns on Comparative Examples 5-8 was 29.5 mm, 31.0 mm, 64.0 mm, and 72.0 mm, respectively.

  Thus, when mounted on the same ACSR as described above with an outer diameter of 28.5 mm, the distance between the tubular portion of the bird harm countermeasure apparatus according to Examples 5 to 8 and the ACSR is 3.0 mm and 8.5 mm, respectively. , 19.5 mm and 28.5 mm. Moreover, the distance of the tubular part of the bird damage countermeasure apparatus which concerns on Comparative Examples 5-8, and ACSR was 1.0 mm, 2.5 mm, 35.5 mm, and 43.5 mm, respectively.

(Evaluation of corrosion resistance)
Each of the above ACSR equipped with these bird damage countermeasure devices was evaluated for corrosion resistance by a corrosion acceleration test. The method for attaching the bird damage countermeasure device to the ACSR is as described above.

The corrosion acceleration test was performed by repeating 2650 cycles of 30 minutes of electrolyte solution spraying / 60 minutes of air drying for each ACSR equipped with each bird damage countermeasure device. At this time, the ACSR was provided with a slackness of about 1.8 m at a distance of 4 m between the support points, and the transformer was energized so that the temperature of the ACSR was 90 ° C. The electrolyte solution was adjusted to pH 4.5 by adding sulfuric acid (H ₂ SO ₄ ) to a 4.6 mass% sodium chloride (NaCl) aqueous solution. The quality of the corrosion resistance was judged from the progress of corrosion of the outermost aluminum wire of the ACSR that had undergone such a corrosion acceleration test.

(Evaluation of wind pressure performance)
Moreover, wind pressure performance was evaluated by the artificial wind tunnel experiment about each said ACSR equipped with each bird damage countermeasure apparatus. The method for attaching the bird damage countermeasure device to the ACSR is as described above.

  In the artificial wind tunnel experiment, an ACSR with a length of about 1 m with each bird damage countermeasure device installed horizontally in the artificial wind tunnel experiment facility, and the wind was applied to the trunk of the bird damage countermeasure device from the side, Wind pressure was applied to the direction perpendicular to the direction (90 °), and the wind pressure load when the wind speed was increased to 40 m / s was measured. The quality of the wind pressure performance was determined based on whether or not the wind pressure load was within an allowable range.

(Evaluation results)
The above evaluation results are shown in Table 2 below.

  First, the evaluation results of corrosion resistance will be described.

  In addition, in the item of “Corrosion resistance” in Table 2, if the progress of the corrosion of the aluminum wire of the outermost layer of the ACSR is the same as the part where the bird damage countermeasure device is not installed, it is judged as good (○). If it corroded from the mounting site, it was judged as impossible (x), and if it corroded vigorously, it was judged as bad (xx).

  As shown in Table 2, the progress of corrosion in Examples 5 to 8 was all the same as the part where the bird damage countermeasure apparatus was not mounted, and good corrosion resistance was obtained. Moreover, also in Comparative Examples 7 and 8 in which the distance between the tubular portion and the ACSR was 3 mm or more, the corrosion resistance was good. On the other hand, in Comparative Examples 5 and 6 in which the distance between the tubular portion and the ACSR was less than 3 mm, corrosion progressed more than the unmounted portion, and in particular, in Comparative Example 5, the corrosion was severe.

  Thus, by setting the distance between the tubular part of the bird damage countermeasure device and the ACSR to be 3 mm or more, the contact between the ACSR and the water is suppressed, and the drainage and breathability of the bird damage countermeasure apparatus are improved. It was found that good corrosion resistance can be obtained.

  Next, the evaluation result of wind pressure performance is described.

  In addition, in the item of “wind pressure performance” in Table 2, the case where the wind pressure load was within the allowable range was determined as good (◯), and the case where the wind pressure load was out of the allowable range was determined as defective (×).

  As shown in Table 2, the wind pressure loads of Examples 5 to 8 were all within the allowable range. Further, Comparative Examples 5 and 6 in which the distance between the tubular portion and the ACSR was 30 mm or less were also within the allowable range. On the other hand, in Comparative Examples 7 and 8 in which the distance between the tubular portion and the ACSR exceeds 30 mm, the wind pressure load is increased by mounting the bird damage countermeasure device, and the applicable places are limited in terms of wind pressure performance. It was a determination result.

  Thus, it was found that by setting the distance between the tubular portion of the bird damage countermeasure apparatus and the ACSR to 30 mm or less, the wind pressure performance at the attachment site of the bird damage countermeasure apparatus can be within an allowable range.

  As a result of comprehensive evaluation based on the above, it was found that the distance between the tubular portion of the bird damage countermeasure apparatus and the overhead electric wire such as ACSR is preferably 3 mm or more and 30 mm or less.

(3) Distance between Openings Next, the bird damage countermeasure device for overhead wires according to Examples 9 to 13 and Comparative Examples 9 to 12 is manufactured, and the outer edge and the second edge of the first opening of these bird damage countermeasure devices The distance from the outer edge of the opening was evaluated.

(Configuration of bird damage countermeasure device for overhead electric wires)
Each bird damage countermeasure apparatus is made of silicone rubber having a volume resistivity of 5 × 10 ¹⁷ Ω · cm, and the thickness of the silicone rubber in the tubular portion and the exterior portion is set to 5.2 mm. Moreover, the internal diameter of the tubular part was 40 mm, and the internal diameter of the exterior part was 20 mm.

  Moreover, the distance of the outer edge of the 1st opening part and the outer edge of a 2nd opening part of the bird damage countermeasure apparatus which concerns on Examples 9-13 was 100 mm, 300 mm, 550 mm, 800 mm, and 1000 mm, respectively. Moreover, the distance of the outer edge of the 1st opening part of the bird damage countermeasure apparatus which concerns on Comparative Examples 9-12 and the outer edge of the 2nd opening part was 30 mm, 80 mm, 1150 mm, and 1350 mm, respectively.

(Insulation evaluation)
The insulation properties of these bird damage countermeasure devices were evaluated by measuring the dielectric breakdown voltage value.

  The measurement of the dielectric breakdown voltage value was carried out in a state where each bird damage countermeasure device having a length of 6 m was mounted in the vicinity of the center of the same ACSR having a length of 9 m and kept horizontal. The method for attaching the bird damage countermeasure device to the ACSR is as described above.

  In the measurement, the ACSR main body was connected to the high voltage electrode, and a metal bind wire attached to the surface of the bird damage countermeasure apparatus was used as the ground electrode. In order to artificially create a wet and wet surface, 3% by weight sodium chloride fouling solution is sprayed on the surface of the ACSR, the surface of the bird damage control device and the inside for about 5 minutes, Measured according to the same procedure as in Example 1, and the ground voltage of the 77kV transmission line was defined as the dielectric breakdown voltage value when the current flowed in the circuit due to creeping discharge (flashover) of the bird damage countermeasure device. The quality of the insulation was judged as a standard.

(Evaluation of corrosion resistance)
In addition, the corrosion resistance of each ACSR equipped with each bird damage countermeasure device was evaluated by a corrosion acceleration test. The method for attaching the bird damage countermeasure device to the ACSR is as described above.

  The corrosion acceleration test was performed in the same procedure as in the above-described example, and the quality of corrosion resistance was determined from the progress of the corrosion of the outermost aluminum element wire of the ACSR after the corrosion acceleration test.

(Evaluation results)
The above evaluation results are shown in Table 3 below.

  First, the evaluation results of insulating properties will be described. In addition, in the item of “insulation” in Table 3, the result was indicated by ◯ × as in the above-described example.

  As shown in Table 3, the dielectric breakdown voltage values of Examples 9 to 13 all exceeded the specified values, and the insulation under the fouling / wet conditions was good. Moreover, also in Comparative Examples 11 and 12 in which the distance between the outer edge of the first opening and the outer edge of the second opening was 100 mm or more, the dielectric breakdown voltage value satisfied the specified value. On the other hand, in Comparative Examples 9 and 10 in which the distance is less than 100 mm, the dielectric breakdown voltage value is less than the specified value, resulting in insufficient insulation.

  Thus, it was found that good insulation can be obtained by setting the distance between the outer edge of the first opening and the outer edge of the second opening in the bird damage countermeasure apparatus to 100 mm or more.

  Next, the evaluation results of corrosion resistance will be described. In addition, in the item of “corrosion resistance” in Table 3, the result was indicated by “×” as in the above-described example. This time there was no XX judgment.

  As shown in Table 3, the progress of corrosion in Examples 9 to 13 was all the same as the part where the bird damage countermeasure apparatus was not mounted, and good corrosion resistance was obtained. Moreover, also in Comparative Examples 9 and 10 in which the distance between the outer edge of the first opening and the outer edge of the second opening was 1000 mm or less, the corrosion resistance was good. On the other hand, in Comparative Examples 11 and 12, in which the distance between the outer edge of the first opening and the outer edge of the second opening exceeds 1000 mm, corrosion has progressed from the unmounted portion.

  Thus, by setting the distance between the outer edge of the first opening and the outer edge of the second opening of the bird damage countermeasure apparatus to 1000 mm or less, contact between the ACSR and water is suppressed, and the bird damage countermeasure apparatus As a result, it was found that the drainage and breathability were improved and good corrosion resistance was obtained.

  As a result of comprehensive evaluation based on the above, it was found that the distance between the outer edge of the first opening and the outer edge of the second opening of the bird damage countermeasure apparatus is preferably 100 mm or more and 1000 mm or less.

DESCRIPTION OF SYMBOLS 10 Bird damage countermeasure apparatus for overhead electric wires 11 Tubular part 11c Cleavage part 11h 1st opening part 12 Exterior part 12h 2nd opening part 13 1st locking mechanism (1st connection mechanism)
13c, 14c Fitting groove 13p, 14p Fitting protrusion 14 Second locking mechanism (second connecting mechanism)
50 Overhead electric wire 50j Jumper wire 100 Steel tower 150 Jumper device

Claims (9)

An insulative tubular portion provided with a first opening in the body and mounted so as to cover the periphery of the overhead electric wire;
A body portion including a second opening, and an insulating exterior portion provided on the body of the tubular portion so as to cover at least the first opening; and
A predetermined gap is provided between the tubular portion and the exterior portion, and between the tubular portion and the overhead electric wire in a state of being attached to the overhead electric wire,
The bird's damage countermeasure device for overhead electric wires, wherein the first opening and the second opening are arranged at positions that do not overlap each other. In the state of being attached to the overhead electric wire, the exterior portion is disposed below the tubular portion, and the position of the center of gravity is adjusted so that the first opening and the second opening face downward. The bird damage countermeasure device for an overhead electric wire according to claim 1. The bird damage countermeasure device for an overhead electric wire according to claim 1 or 2, wherein a groove communicating with the second opening is formed in an inner wall surface of the exterior portion in a longitudinal direction. The bird damage countermeasure device for an overhead electric wire according to any one of claims 1 to 3, wherein at least the first opening is elongated in the longitudinal direction of the tubular portion. The bird's damage countermeasure device for an overhead electric wire according to any one of claims 1 to 4, wherein a distance between an outer edge of the first opening and an outer edge of the second opening is 100 mm or more and 1000 mm or less. The bird for an overhead electric wire according to any one of claims 1 to 5, wherein the distance between the tubular portion and the overhead electric wire, which is attached to the overhead electric wire and in which a gap is generated, is 3 mm or more and 30 mm or less. Damage prevention device. The tubular portion includes a cleaving portion that cleaves the tubular portion along the longitudinal direction,
The bird's damage countermeasure device for an overhead electric wire according to any one of claims 1 to 6, wherein the cleaving portion includes a double coupling mechanism configured by fitting that can be freely coupled and released. The tubular portion and the exterior portion are integrally formed by extrusion molding of an insulating material,
The bird damage countermeasure device for an overhead electric wire according to claim 7, wherein a gap between the tubular portion and the exterior portion is formed by connecting the double connection mechanisms. 9. The bird damage countermeasure device for an overhead electric wire according to claim 1, wherein the device is made of silicone rubber having a thickness of 2 mm to 10 mm.

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