JPH09200933A - Multi-conductor transmission line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of problems such as a mark falling, etc., by binding optional element conductors with one another by a linear substance to attract attention. SOLUTION: A multiconductor transmission line is a transmission line of four conductors, and four element conductors 11a, 11b, 11c, and 11d are laid in a square shape. The upper two conductors 11a and 11b are bound with each other by a pair of linear substances for to attract attention. The linear substance 12 for attention is made of lines where insulating fibers are intertwined, lines where conductive metallic wires are intertwined, or the like. For this linear substance 12 for attention, both ends are attached to the rings 13 clamping the element conductors 11a and 11b. That is, a linear substance mount 13a is made at the rings 13 clamping the element conductors 11a and 11b, and both ends of the linear substance 12 for attention are fixed to such a linear substance mount 13a. This way, since optional element conductors are bound by the linear substance 12 for attention, a problem does not occur such as that the mark falls as a conventional mark ring.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiconductor power transmission line.

[0002]

2. Description of the Related Art The route of a multi-conductor transmission line may pass through a habitat of birds, especially protected birds. In order to prevent a bird from colliding with the multi-conductor power transmission line, a marking ring as shown in FIG. 5 may be attached to such a multi-conductor power transmission line. Further, a sign ring as shown in FIG. 5 may be attached in order to inform a person on board a helicopter or a person under construction of a multiconductor transmission line of the existence of the multiconductor transmission line.

The marker ring shown in FIG. 5 is composed of a conductor gripping portion 1 for gripping a conductor and a marker body 2 suspended below the conductor gripping portion 1. Conductor grip 1
Is an opening ring body having a C-shaped cross section,
After gripping, the opening is closed, and the projection 1a provided on one side of the opening is fitted into the recess 1b provided on the other side of the opening to attach to the overhead power transmission line A. Further, a marker piece mounting hole 1c for mounting a marker piece 2 described later is provided on the lower side of the conductor grip portion 1. The marker 2 comprises a rigid plate-shaped marker piece 2a and a rod-shaped connecting piece 2b integrally formed on the marker piece 2a.
It is composed of The marker body 2 is suspended from the conductor gripping portion 1 by passing the connecting piece 2b through the marker piece mounting hole 1c of the conductor gripping portion 1 and fixing the tip end of the marker piece 2a. Reference numeral 3 is a fixed portion of the connecting piece 2b.
The conductor grip 1 and the marker 2 are made of plastic or the like.

In this sign ring, the sign piece 2a of the sign body 2 moves flutteringly due to the wind, so that the bird and the human are informed of the existence of the overhead power transmission line, and the bird and the human collide with the overhead power transmission line. Is to prevent.

[0005]

However, the conventional sign ring has a problem that the sign body drops due to corona discharge when used in a multi-conductor transmission line having a high voltage. That is, when the marker 2 is shaken by the wind,
The connecting piece 2b may float in the marker piece mounting hole 1c. In this way, when the connecting piece 2b floats in the marker piece mounting hole 1c, a potential difference is generated between the conductor gripping portion 1 and the marker body 2 suspended below the conductor gripping portion 1, and therefore both Corona discharge occurs between them, the marking piece mounting hole 1c or the connecting piece 2b is burned, and the marking body falls.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a multi-conductor power transmission line having an alerting linear body that does not cause a problem such as a drop of a sign. The configuration is characterized in that, in a multi-conductor power transmission line in which a plurality of element conductors are installed, arbitrary element conductors are connected by a warning-use linear body.

By connecting arbitrary elemental conductors with a linear body for alerting, it is possible to inform birds and humans of the existence of the multi-conductor transmission line. In addition, the alerting linear body used in the present invention does not have the problem that the marker drops like the conventional marker ring.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. 1A and 1B show a first embodiment of a multiconductor power transmission line according to the present invention. This multi-conductor power transmission line is a four-conductor power transmission line, and four element conductors 11a, 11b, 11c, and 11d are installed in a square shape. The upper two elemental conductors 11a and 11b are connected by an alerting linear body 12. Attention-use linear object 12
Is formed of a wire in which insulating fibers are twisted, a wire in which a conductive metal wire is twisted, and the like. This alert line 1
The both ends of 2 are attached to the ring 13 which holds the element conductors 11a and 11b. That is, as shown in FIG. 2, the ring 13 holding the element conductors 11a and 11b has
The linear body attaching portion 13a is formed, and both ends of the alerting linear body 12 are fixed to the linear body attaching portion 13a. The shape of the ring 13 is, for example, the same as that of the conductor holding portion shown in FIG. 5, that is, an opening ring body having a C-shaped cross section, and the opening portion is closed after the element conductor is held, and one of the opening portions is closed. The protrusion is provided so as to fit into the recess provided on the other side of the opening.

[0009] It is preferable that the surface of the alerting linear body 12 is colored red or yellow, or a fluorescent paint is applied, in order to alert the birds and humans.

A plurality of the alerting linear bodies 12 are attached at predetermined intervals in the longitudinal direction of the multiconductor power transmission line. The positions where the alerting linear bodies 12 are attached at predetermined intervals in the longitudinal direction of the multiconductor power transmission line may be the entire length in the longitudinal direction of the multiconductor power transmission line, or for example, only in the vicinity of the central portion of the multiconductor power transmission line. But it's okay. Further, the alerting linear body 12 is not at right angles to the longitudinal direction of the multi-conductor power transmission line as in the embodiment, but as shown by the dotted line in FIG. It may be attached at an arbitrary angle α.

In order to construct the multi-conductor transmission line having the above structure, the alerting linear body 12 having the rings 13 attached to both ends thereof is provided.
A predetermined number of these are prepared, and a person who rides on the airborne vehicle traveling on the multi-conductor transmission line puts the ring 13 on the element conductor 11
The element conductors 11a and 11b are connected to each other by the attention-providing linear body 12 by sequentially attaching the element conductors 11a and 11b.

FIGS. 3A and 3B show a second embodiment of the multiconductor power transmission line according to the present invention. This multiconductor power transmission line is different from the above embodiment in that diagonal element conductors 11a and 11c are connected by an alerting linear body 12. In FIG. 3, the same parts as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted.

On the outer periphery of the alerting linear body 12,
A plurality of rotating bodies 15 having protrusions 15a as shown in FIGS. 4A and 4B may be rotatably attached. If such a rotating body 15 is rotatably attached to the outer periphery of the alerting linear body 12, by rotating the rotating body 15, it is possible to further draw the attention of a bird or a human.

The element conductor to which the alerting linear member 12 is attached is not particularly limited. For example, the element conductors 11c and 11
It may be between d, 11a and 11d, 11b and 11c. At this time, the alerting linear body 12 includes the element conductors 11a,
From the viewpoint of preventing corona, it is preferable to position it within a circumscribing circle A (see FIG. 1) that is in contact with the outer peripheral surfaces of 11b, 11c, and 11d. This is because the electric field is weak at this position and corona is unlikely to occur.

The present invention is not limited to a multi-conductor power transmission line in which the number of elementary conductors is four, but the number of elementary conductors is two, three, six,
It can be applied to multi-conductor transmission lines such as eight and ten. Also in this case, the alerting linear body, the rotating body, and the like are positioned within the circumscribed circle A that contacts the outer peripheral surface of the element conductor to prevent corona generation.

[0016]

As described above, in the multi-conductor overhead power transmission line according to the present invention, in a multi-conductor power transmission line in which a plurality of element conductors are laid, arbitrary element conductors are connected by a linear body for alerting. Therefore, it can inform birds and humans of the existence of multi-conductor transmission lines. Further, in the present invention, since the alerting linear body is used, there is no problem that the marker drops like the conventional marker ring.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention (a)
Is a left side view and (b) is a plan view.

FIG. 2 is a front view showing an attached state of a warning alert linear body.

FIG. 3 shows a second embodiment of the present invention (a)
Is a left side view, and (b) is a front view.

FIG. 4 shows a rotating body used in the present invention.
Is a left side view, and (b) is a front view.

FIG. 5 is a front view of a conventional marker ring.

[Explanation of symbols]

 11a, 11b, 11c, 11d Element conductor 12 Attention-raising linear body 13 Ring 15 Rotating body

Claims (1)

[Claims] 1. A multiconductor power transmission line in which a plurality of element conductors are erected, and a plurality of element conductors are connected by an alerting linear body.