JPS6250801B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for installing an optical communication line by attaching the optical communication line to an overhead line such as an overhead ground wire, an overhead power transmission line, or a messenger wire.

BACKGROUND ART Consideration is being given to attaching optical communication lines to overhead lines such as overhead ground wires of overhead power transmission lines, overhead power transmission lines, and shielding lines to communicate with substations and power plants, or to monitor steel towers.

In this case, there are two problems when installing the optical communication line alongside the overhead line. One of these is that the installation height is several tens of meters, and the other is that the distance between the steel towers is long, several hundred meters.

For this reason, when the current installation method shown in Figure 1 is applied to the installation method of optical communication lines with attached racks, there is a drawback that the optical communication lines, which are susceptible to tension and straining, deteriorate due to the two problems mentioned above. Ta. That is, overhead wires 2 made of overhead ground wires are installed at the upper ends of steel towers 1 that are erected at predetermined intervals. In order to attach an optical communication line 3 to the overhead line 2, a metal wheel 4 is suspended from the upper end of the steel tower 1. The optical communication line 3 is launched from a wire storage body 5 such as a drum on the ground, turned horizontally at the metal wheel 4 at the left end, passed over each metal wheel 4, and then extended to a predetermined location. A tension is applied to the wire, which is attached to the overhead wire 2, and is supported by a support body. In such a method, not only is a large tension applied to the optical communication line 3 for stretching the line, but also a large straining force is applied when the optical communication line 3 passes through the metal wheel 4. Therefore, the optical communication line 3 needs to be fairly strong, in other words, has a large outer diameter, which poses problems in terms of cost and wind pressure load.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for installing an optical communication line on an overhead line while preventing large tension or straining force from acting on the optical communication line.

The present invention provides a method for installing an optical communication line attached to an overhead line in the air, in which an optical communication line body storing the optical communication line is suspended from the overhead line and moved in the air. A vehicle equipped with an overhead wire is suspended from the overhead line behind the wire storage body, and a vehicle equipped with an attached support is run, and the optical communication line drawn out from the wire storage body is caused to approach the vehicle equipped with the attached support with respect to the overhead wire. The optical communication line is passed through a guide provided at the base, and then placed along the overhead line, and the optical communication line is sequentially supported on the overhead line by an attachment support mounted on the attachment support vehicle, and is attached to the overhead line. It is something to do.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIG. At the upper ends of steel towers 1 erected at predetermined intervals, overhead wires 2 made of overhead ground wires are installed by a known method. Using this overhead wire 2 as a support, a wire storage body running support 6, a moving metal wheel 7, and a car 8 equipped with an attached support
are made to travel in the air in this order. For example, a spacecraft is used as the vehicle 8 equipped with a support structure. The optical communication line storage body 5, which is stored by winding the optical communication line 3 around a drum, is supported on the line storage body traveling support 6, and the optical communication line storage body 5 is moved in the air along the overhead line 2. Let them do it. Further, the wire storage body running support 6 and the movable metal wheel 7 are moved by being pulled by, for example, a common pulling wire 9. Pulling wire 9
For example, it is towed on the steel tower 1 in front, or on the ground via a metal wheel 12 supported by the steel tower 1. The guide 10 is supported on the vehicle 8 equipped with a supporting structure so as to be substantially parallel to the overhead wire 2 and as close to the overhead wire 2 as possible. As the guide 10, a guide pipe is used in this embodiment. Further, on this supporting support vehicle 8, an supporting support 11 such as a spiral preform rod or a lashing wire is mounted. Such a vehicle 8 equipped with an attached support member can be moved by itself independently of the wire storage body 5 and the movable metal wheel 7, or can be pulled by another pulling wire.
Note that the track storage body running support 6 is a vehicle 8 equipped with an attached support.
It can also be moved by a worker on top pushing it with a stick or the like.

In this embodiment, the optical communication line 3 is fed out from the wire storage body 5 while moving the wire storage body traveling support 6 and the movable metal wheel 7 along the overhead wire 2.
While being supported by a movable metal wheel 7 so as not to loosen, the wire is passed through a guide 10 of a car 8 equipped with a supporting structure, and then attached to an overhead wire 2. By guiding the optical communication line 3 with the guide 10 in this manner, the optical communication line 3 can be brought close to the overhead line 2 and maintained in a substantially parallel state. In this state, the overhead wire 2 and the optical communication line 3 attached thereto are wrapped with the supporting frame support 11 using a wrapping machine or the like, so that the optical communication line 3 is successively supported on the overhead line 2. As the attachment supports 11 are attached, the attachment support vehicle 8 is sequentially moved. By sequentially performing such operations, the optical communication line 3 is attached to the overhead line 2 in a predetermined section.

The optical communication line 3 is preferably a non-metallic optical communication line that does not contain metal in order to make the wire storage body 5 as light as possible, and the optical communication line 3 is preferably a fiber-reinforced plastic coated optical fiber core wire with high strength. It is recommended to use

The present invention is not limited to the case where the optical communication line 3 is installed attached to an overhead line 2 made of an overhead ground wire, but the optical communication line 3 is attached attached to an overhead line 2' made of an overhead power transmission line, etc. This can be similarly applied to other cases. Further, the same can be applied to the case where the wire is attached to a messenger wire.

It goes without saying that the wire storage body 5 may be a wire storage body in which the optical communication line 3 is coiled in a container.

Although a guide pipe is used as a guide in the above embodiment, a guide roller may also be used.

If a brake is attached to the wire storage body traveling support 6 and the brake is operated by an operator on the vehicle 8 equipped with the overhead wire 2 by pulling a string or the like, the slack in the overhead wire 2 can be prevented. This is suitable in a case where the wire storage body running support 6 moves forward without permission.

As explained above, the method for installing an optical communication line according to the present invention involves suspending an optical communication line storage body storing optical communication lines from an overhead line and moving the optical communication line in the air while letting out the optical communication line. I made it line up with the line, so
Optical communication lines no longer sag due to their own weight when passing between widely spaced wire wheels.
Therefore, large straining and large tension when passing through the metal wheel are not applied, and even a thin optical communication line can be attached to an overhead line without damaging it. Further, since the optical communication line is lightweight, it can be easily stored as a wire storage body and moved through the air. Furthermore, since the optical communication line is brought close to the overhead line and attached to the overhead line through a guide supported by a vehicle equipped with an overhead support, the optical communication line can be placed almost parallel to the overhead line without applying large tension to the optical communication line. condition can be maintained, and the installation work of the supporting support can be easily performed. Furthermore, by passing the optical communication line through the guide, it is possible to prevent the optical communication line from being damaged due to some reason at the location of the vehicle equipped with the supporting support.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the implementation state of the conventional installation method;
FIG. 2 is an explanatory diagram showing an example of the implementation state of the laying method according to the present invention. 1... Steel tower, 2... Overhead line, 3... Optical communication line,
5... Optical communication wire storage body, 6... Line storage body running support, 8... Car with attachment support, 9... Pulling wire, 10... Guide, 11... attachment support.

Claims (1)

[Claims] 1. In a method for installing an optical communication line attached to an overhead line in the air, an optical communication line storage body storing the optical communication line is suspended from the overhead line and moved in the air, A vehicle equipped with an overhead wire is suspended from the overhead wire behind the wire storage body, and a vehicle equipped with an attached support is run, and the optical communication line drawn out from the wire storage body is caused to approach the vehicle equipped with the attached support with respect to the overhead wire. The optical communication line is passed through a guide provided at the same time, and then placed along the overhead line, and the optical communication line is successively supported on the overhead line by an attachment support mounted on the attachment support vehicle, and is attached to the overhead line. How to install an attached optical communication line.