JPH01120713A - Optical fiber composite overhead earth-wire for distribution line - Google Patents

Abstract

PURPOSE:To protect an overhead earth-line against a thunderbolt by covering a stainless pipe around a spacer storing optical fiber cables in its grooves and further covering the pipe with a conducting material pipe. CONSTITUTION:Optical fiber cables 1 are stored in the grooves of a spacer 2, the periphery of the spacer 2 containing the optical fiber cables 1 is covered with a stainless pipe 4, and the periphery of this stainless pipe 4 is covered with a conducting material pipe 5. The conducting material pipe 5 prevents overheat by the induction current through a distribution line excited by a thunderbolt. When it is formed in a pipe shape with a plate material, the soldering 6 prevents the infiltration of water into the inside. The stainless pipe 4 preserves the airtightness of the inside (prevents the infiltration of water into the inside) when the outside conducting material pipe 5 is melted by the discharge of a thunderbolt and contributes to improving the tensile strength of an overhead earth-wire with this structure. An overhead distribution line can be thereby protected against a thunderbolt.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an optical fiber composite overhead ground wire for power distribution lines.

<Prior Art and its Problems> Conventionally, a hard copper wire with an outer diameter of 5 φ, for example, has been stretched over the overhead distribution line to prevent lightning from striking the overhead distribution line.

In addition, as shown in Figure 2, the conventional optical fiber composite overhead ground wire for ultra-high voltage (660KV or more) has an outer diameter of 5IR, for example.
A spacer 12 having a groove 14 and an optical fiber 11 are housed in the #Iφ aluminum pipe 13, and the aluminum pipe 13 is coated with aluminum in order to have the same strength as a conventional overhead ground wire. It has a structure made of twisted steel @15.

However, when such an optical fiber composite overhead ground wire is used for distribution lines, (1) the outer diameter becomes 5 mm or more, and the wind pressure load increases.

(2) Since aluminum-covered steel wire is used, additional millimeters are added, which necessitates increasing the strength of the support pillars of the distribution line, making it unsuitable for replacing existing lines.

There were other problems.

Means for Solving the Problems> In view of the above, the present inventors have developed a light that can be replaced with existing distribution line support pillars and that can protect overhead distribution lines from lightning strikes without increasing the weight. This invention was developed as a result of studies on fiber composite overhead ground wires.

That is, the present invention improves the above-mentioned conventional overhead ground wire by storing an optical fiber cable in the groove of a spacer having a groove, then covering the spacer with a stainless steel vibrator, and further covering the circumference with a conductive material vibrator. This solves the problem.

Further, in the present invention, an optical fiber for communication is built into the overhead ground wire so that it functions as a communication line.

<Operation> Hereinafter, the present invention will be described as an embodiment based on the drawings.

That is, FIG. 1 is a sectional view showing the structure of the optical fiber composite overhead ground wire of the present invention, in which one optical fiber cable 1 is housed in a groove 3 of a spacer 2, and this optical fiber cable 1 is housed in a groove 3 of a spacer 2. The periphery of the spacer 2 is covered with a stainless steel vibe 4, and the stainless steel vibe 4 is further covered with a conductive material vibe 5.

To explain the purpose and effect of each component in the above-mentioned optical fiber cable composite overhead ground wire of the present invention manufactured by @Zuko, the conductive material vibrator 5 is made of, for example, a 0.8 t annealed copper vibrator or a plate welded into a cylindrical shape 6. However, a pipe-shaped one is used. The purpose of this conductive material vibrator 5 is to prevent overheating due to lightning strikes and induced currents caused by energization of power distribution lines.

Furthermore, when a plate is used to form a pipe, welding 6 serves to prevent water from entering the inside.

The stainless steel vibrator 4 has a thickness of, for example, 0.5 to 1.
A stainless steel vibrator or a plate welded into a cylindrical shape 7 to form a pipe shape is used.

The purpose of this stainless steel vibrator 4 is to maintain an airtight interior (prevent water from entering the interior) when the outer conductive material vibrator 5 is damaged by lightning discharge. The stainless steel vibrator 4 also contributes to improving the tensile strength of the aM N overhead ground wire. The stainless steel vibe 4 is made into a cylindrical shape using plate material, and when it is made into a pipe shape, welding 7 is performed.
It is not limited to, and it is possible to meet each other.

However, in the case of butting, a covering material is required inside the stainless steel vibrator 4 to prevent water from seeping in, and such a covering material may be made of a plastic material.

The material for the second spacer may be hard copper, stainless steel, or plastic. Moreover, the shape shown in FIG. 1 is only an example, and any shape may be used as long as the optical fiber cable 1 can be accommodated in the groove.

In addition, the spacer serves the purpose of increasing the overall tensile strength and preventing overheating due to the induced currents caused by the power distribution lines.

In the present invention, as the optical fiber cable, a 3-fiber bundled optical fiber cable, a 6-fiber bundled optical fiber cable, a tape core wire, etc. can be used.

<Effects of the Invention> As explained above, the optical fiber composite overhead ground wire for power distribution lines of the present invention has a structure in which a stainless steel vibrator is surrounded by a spacer in which an optical fiber cable is stored in a groove, and a conductive material vibrator is further coated around the spacer. By doing so, it is possible to improve the strength and protect the overhead ground wire even if there is a lightning strike.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the structure of an overhead ground wire according to the present invention;
FIG. 2 is a cross-sectional view showing the structure of a conventional overhead ground wire.

Claims (3)

[Claims] (1) Optical fiber composite overhead space for power distribution lines, characterized in that an optical fiber cable is housed in the groove of a spacer having a groove, and then the spacer is covered with a stainless steel pipe, and the surrounding area is further covered with a conductive material pipe. line. (2) The optical fiber composite overhead ground wire for power distribution lines as set forth in claim 1, wherein the stainless steel pipe is coated with a cylindrical plastic material for preventing water intrusion on the inside thereof. (3) The optical fiber composite overhead ground wire for power distribution lines according to claim 1, wherein the conductive material pipe is a copper pipe.