JP3023906B2 - Overhead ground wire combining power line and optical communication line - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overhead ground line installed above an overhead transmission line, and more particularly to an overhead ground line combining a power line and an optical communication line.

[0002]

2. Description of the Related Art Conventionally, as an aerial ground wire in which a striated body for a certain purpose is combined, (a) a power line combined imaginary ground wire in which a striated body for power supply is combined; BACKGROUND ART An optical communication line (optical fiber) composite overhead ground wire in which a striatum for information transmission is composited is known. In the case of (a) above, without separately laying power lines separately from a distant power source over a long distance, an aviation obstacle light installed on a steel tower, for example, using a power line combined with an overhead ground wire (B) In the case of (b), the optical communication line combined with the overhead ground line can be used without laying the communication line by another route, for example, for the overhead transmission line. Various types of information for system protection and control can be easily and reliably transmitted to remote locations.

[0003]

SUMMARY OF THE INVENTION
Since communication lines are not combined in the composite overhead ground line (a), communication lines for obtaining various types of overhead transmission line information must be separately laid separately, and similarly, the composite overhead line (b) Since the power line is not combined with the ground line, the power line for lighting the aviation obstruction light, etc. must be separately laid separately.In other words, the conventional composite ground line is either a communication line or a power line. Since one of them has to be laid separately from the composite overhead ground line, it is extremely uneconomical in terms of securing land and laying work, and the construction cost of the track is unnecessarily high.

[0004] An object of the present invention is to provide a novel composite overhead ground wire that advantageously solves the above-mentioned problems.

[0005]

In order to achieve the above object, according to the present invention, a steel stranded wire formed by twisting a plurality of steel wires is provided outside a metal tube containing an optical fiber. An insulated wire was provided outside the steel stranded wire, and a metal stranded wire formed by twisting a plurality of metal wires was provided outside the insulated wire to form an overhead ground wire combining a power line and an optical communication line.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an overhead ground wire which combines a power line and an optical communication line according to the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention, in which an optical fiber 1 as an optical communication line is accommodated in a metal tube 2 made of aluminum or the like. Metal tube 2
Is provided with a steel stranded wire 4 formed by twisting a plurality of steel wires 3 having an aluminum coating 8 around the wire. Outside the stranded steel wire 4, two insulated electric wires 5 composed of a conductor 9 and an insulating coating 10 surrounding the conductor 9 are arranged in a circumferential direction by 18.
The steel wires 4 are arranged at symmetrical positions separated from each other by 0 °, and on the outer periphery of the steel stranded wire 4 between the two insulated wires 5, there are provided inclusions 11 for filling the gaps in the portions. Examples of the inclusion 11 include an aluminum wire, an aluminum-coated steel wire,
A galvanized steel wire or the like is used. On the outside of the layer composed of the insulated wires 5 and the inclusions 11, an aluminum wire,
A metal stranded wire 7 formed by twisting a plurality of metal wires 6 made of an aluminum covered steel wire, a galvanized steel wire or the like is provided,
Thus, an overhead ground wire combining the power line and the optical communication line of the present invention is configured.

In the above-mentioned configuration, the optical fiber 1 is protected from the action of harmful mechanical external force and contact with water by the metal tube 2. For example, transmission of various information for system protection and control of the overhead transmission line. Served as a service. In addition, steel stranded wire 4
Serves as a tension member to bear the installation tension of this composite overhead ground wire. Furthermore, the insulated wire 5
For example, it is used as a power supply line for lighting an aviation obstacle light. The outermost metal stranded wire 7 serves as a current path flowing through the overhead ground wire. Thus, the outermost metal stranded wire 7
Is a path of ground wire current and serves as a ground wire, so that electrostatic induction and electromagnetic induction from the overhead transmission line to the insulated wire 5 can be reduced or eliminated, and the insulated wire 5 The arc can be prevented from being fixed to the wire.

[0008]

According to the present invention, since both the power line and the optical communication line are combined with the aerial ground line, the conventional combined aerial which requires either the power line or the communication line to be separately laid separately. Eliminating the uneconomics seen on the ground wire can greatly reduce the cost of line construction.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an overhead ground wire combining a power line and an optical communication line according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 optical fiber 2 metal tube 3 steel wire 4 steel stranded wire 5 insulated wire 6 metal wire 7 metal stranded wire

Claims (1)

(57) [Claims] 1. A metal tube containing an optical fiber (1).
A steel stranded wire (4) formed by twisting a plurality of steel wires (3) is provided outside (2), and an insulated wire (5) is provided outside the steel stranded wire (4).
Are provided, and a plurality of metal wires are provided outside the insulated wire (5).
An overhead ground wire combining a power line and an optical communication line, comprising a metal stranded wire (7) obtained by twisting (6).