JP3551994B2 - Multi-conductor transmission line - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a multiconductor power transmission line to which a sign member is attached.
[0002]
[Prior art]
Multi-conductor power lines may pass through bird habitats, especially protected birds, and it is necessary to prevent birds from colliding in such multi-conductor power lines. It is also necessary to prevent the helicopter from colliding with the multiconductor transmission line. Further, if a conductive fishing rod or the like comes into contact with the multi-conductor transmission line, an electric shock accident occurs, and it is necessary to prevent this.
[0003]
Therefore, conventionally, a sign member 3 as shown in FIGS. 5A and 5B is attached to a multiconductor power transmission line.
The marking member 3 includes a ring portion 31 for gripping a conductor, and a disc-shaped marking piece 32 suspended below the ring portion 31. The ring portion 31 and the marker piece 32 are formed of plastic or the like.
[0004]
The sign member 3 informs birds and humans of the existence of the multi-conductor transmission line by moving the sign pieces 32 in a fluttering manner by the wind, thereby preventing the bird and the helicopter from colliding with the multi-conductor transmission line. This prevents a fishing rod or the like from coming into contact with the multiconductor transmission line.
[0005]
[Problems to be solved by the invention]
However, the conventional sign member has a structure in which it is hung on a conductor, and has a problem that corona discharge is likely to occur when the transmission voltage is an extremely high voltage of, for example, 275 KV or more.
[0006]
That is, when the transmission voltage is as high as 275 KV or the like, the one-phase conductor is composed of a plurality of conductors. There is a problem that corona discharge is easily generated from the sign ring, which causes radio wave interference of radio and television.
In addition, there was a problem that the marker piece was damaged and dropped by the minute arc discharge of the corona discharge.
[0007]
[Means for Solving the Problems]
The present invention has been made in view of the above problems, and does not cause corona discharge even when used in an ultrahigh-voltage multiconductor transmission line of 275 KV or more, and can prevent collision of birds and the like and contact of fishing rods and the like. A multi-conductor transmission line is provided.
[0008]
The multi-conductor power transmission line of the present invention is arranged with a striated body attached with a sign member along the multi-conductor, and the sign member is located in a circle in contact with the outer peripheral surface of each conductor constituting the multi-conductor. It is characterized by being located.
[0009]
A striatum to which a marker member is attached is arranged along the multiconductor, and the marker member is positioned within a circle in contact with the outer peripheral surface of each conductor constituting the multiconductor, thereby causing the marker member to have a potential. Since it can be installed in a portion with a low inclination, the occurrence of corona discharge can be prevented. In addition, since the presence of the transmission line can be notified to birds and humans by the marker, collision of birds and helicopters and contact of fishing rods and the like can be prevented.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings.
1 and 2 show a case where the present invention is applied to a four-conductor power transmission line, where 1A, 1B, 1C, and 1D are conductors constituting a four-conductor power transmission line, and 2 is each of conductors 1A, 1B, 1C, and 1D. The striated bodies 3, which are located substantially at the center and are arranged along the conductors, are marker members attached at predetermined intervals in the longitudinal direction of the striated body 2.
[0011]
Each of the conductors 1A, 1B, 1C, and 1D constituting the four-conductor power transmission line is a steel core aluminum stranded wire obtained by twisting an aluminum wire on a steel core, or a low sag type wire obtained by twisting an aluminum wire on an invar wire. Is used.
[0012]
The striated body 2 may be a metal stranded wire obtained by twisting a metal wire such as aluminum or steel, a plastic stranded wire obtained by twisting a plastic wire, a rod made of aluminum or steel, a glass fiber or a carbon fiber. Rods can be used.
The striated body 2 is located substantially at the center of each of the conductors 1A, 1B, 1C, and 1D constituting the four-conductor power transmission line, and is arranged along each conductor.
[0013]
The markers 3 are attached at predetermined intervals in the longitudinal direction of the striated body 2, and have the same shape as that shown in FIGS. 5 (a) and 5 (b).
As shown in FIG. 2, the marker 3 is arranged inside a circle X that is in contact with the outer peripheral surface of each of the conductors 1A, 1B, 1C, and 1D constituting the multiconductor.
Since the potential gradient is low inside the circle X in contact with the outer peripheral surface of each of the conductors 1A, 1B, 1C, and 1D constituting the multiconductor, if the marker 3 is arranged at such a position, the corona discharge from the marker 3 Does not occur.
[0014]
In order to configure the multi-conductor power transmission line having the above-described configuration, first, the marker 3 is attached to the striated body 2, and then the striated body 2 is connected to the substantially central portion of each of the conductors 1A, 1B, 1C, and 1D constituting the transmission line. What is necessary is just to arrange | position at a position and along each conductor.
As described above, first, the marker 3 is attached to the striated body 2, and the marker 3 is disposed at a substantially central position of each of the conductors 1A, 1B, 1C, and 1D and along each conductor. Can be arranged at a predetermined position at the same time, so that there is an advantage that the construction is simplified.
Note that it is a matter of course that the marker 3 may be attached to the striated body 2 after the striated body 2 is first arranged at a predetermined position.
[0015]
FIG. 3 shows another embodiment of the multi-conductor power transmission line according to the present invention. The difference from the above-described embodiment is that the outer peripheries of the conductors 1A, 1B, 1C, 1D and the outer perimeter of the striated body 2 are different. The wire 4 is wound in a spiral shape.
[0016]
When the wire 4 is spirally wound around the outer circumferences of the conductors 1A, 1B, 1C, and 1D and the outer circumference of the striated body 2, wind noise generated in the conductors 1A, 1B, 1C, 1D and the striated body 2 This has the effect of being able to reduce.
The spiral wire 4 may be wound around only one of the outer circumferences of the conductors 1A, 1B, 1C, and 1D or the outer circumference of the striated body 2.
[0017]
FIG. 4 shows another embodiment of the multi-conductor power transmission line according to the present invention. The difference from the above embodiment is that a plastic cylinder is used as the sign 3.
The plastic tube is fixed to the striated body 2 by heat welding or bonding. The interval between the attachment of the plastic cylinders is appropriately selected.
[0018]
In the above-described embodiment, the case where the present invention is applied to a four-conductor multi-conductor transmission line is described. However, the present invention can be applied to a two-conductor, six-conductor, eight-conductor, etc. multi-conductor transmission line. It is.
[0019]
In the above-described embodiment, the striated body 2 is arranged at substantially the center of each of the conductors 1A, 1B, 1C, and 1D constituting the transmission line and along each conductor. The position is not particularly limited, and may be inside or outside the circle X that contacts the outer peripheral surfaces of the conductors 1A, 1B, 1C, and 1D. Preferably, the position of the striated body 2 is inside the circle X that contacts the outer peripheral surfaces of the conductors 1A, 1B, 1C, and 1D. This is because such a position has a low potential gradient.
[0020]
Further, the shape of the marker 3 and the interval between the markers are not particularly limited. For example, the marker 3 may be formed by winding a tape-like material around the striatum 2. Further, it is preferable that the marker 3 is coated with an aluminum foil that reflects light rays, is painted with a prominent red color, or is coated with a fluorescent coloring paint. Examples of the shape of the marker 3 include a mobile-like movement such as a hanging kite, a flash-like light such as a strobe flash, and a strong magnet that disturbs the surrounding magnetic field.
[0021]
【The invention's effect】
As described above, the multi-conductor power transmission line according to the present invention has a striated body to which a sign member is attached along the multi-conductor, and the sign member has an outer periphery of each conductor constituting the multi-conductor. Since it is characterized by being located in a circle in contact with the surface, the marker member can be installed in a portion with a low potential gradient. Therefore, generation of corona from the sign member can be prevented. In addition, since the presence of the transmission line can be notified to birds and humans by the sign, the collision of birds and helicopters and the like and the contact of fishing rods and the like can be effectively prevented.
[Brief description of the drawings]
FIG. 1 is a front view showing a first embodiment of the present invention.
FIG. 2 is a side view of FIG.
FIG. 3 is a front view showing a second embodiment of the present invention.
FIG. 4 is a front view showing a third embodiment of the present invention.
5 (a) is a side view and FIG. 5 (b) is a front view showing a sign ring.
[Explanation of symbols]
1A, 1B, 1C, 1D Four conductors constituting a four-conductor transmission line 2 Striatal body 3 Marking member 4 Spiral wire

Claims (1)

A striated body to which a sign member is attached is arranged along the multiconductor, and the sign member is located in a circle in contact with the outer peripheral surface of each conductor constituting the multiconductor. Multi-conductor transmission line.

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