JP2586755Y2 - Overhead transmission 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 transmission line in which icing and snow are prevented.

[0002]

2. Description of the Related Art Conventionally, as a means for preventing icing and snow on an overhead transmission line, a method of applying a substance which makes it difficult for ice and snow to adhere to the surface of the overhead transmission line, or increasing the current flowing through the overhead transmission line to attach the substance. There is a method of melting ice and snow.

[0003]

However, there is a problem that the method of applying a substance that makes ice and snow hardly adhere to the surface of an overhead transmission line cannot be expected to be effective over a long period of time due to the loss, deterioration, and the like of the substance. In addition, the method of increasing the conduction current has a problem in the operation of the power transmission system.

An object of the present invention is to provide an overhead power transmission line capable of stably and reliably preventing icing and snow for a long period of time.

[0005]

In order to achieve this object, the present invention is to twist a heating element made by attaching a magnetic ring to a metal element at a predetermined interval in a longitudinal direction of the metal element in an outermost layer. It is characterized by the following.

[0006]

[Function] If the heating element wire in which the magnetic ring is attached to the metal element wire is twisted into the outermost layer, the current flow causes the magnetic ring to generate heat. It becomes possible.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show an embodiment of the present invention. The overhead power transmission line 1 is formed by twisting four heat generating wires 3 at intervals in the circumferential direction between outermost conductive wires 2. As shown in FIG. 3, the heating wire 3 is a metal wire 4
The magnetic ring 5 is attached at a predetermined interval in the longitudinal direction. The diameter of the metal wire 4 is smaller than the diameter of the conductive wire 2, and the diameter of the magnetic ring 5 is the same as the diameter of the conductive wire 2.

[0008] When the heating element wire 3 in which the magnetic ring 5 is attached to the metal element wire 4 is twisted in the outermost layer together with the conductive element wire 2, the magnetic ring 5 generates heat by an electric current, so that the icing snow is melted. be able to.

FIG. 4 shows another example of the heating element wire used in the present invention. The heating wire 3 has a small diameter portion 6 formed on a metal wire 4 having the same diameter as the conductive wire 2 at a predetermined interval in the longitudinal direction, and a magnetic ring 5 is attached to the small diameter portion 6. Things. The diameter of the magnetic ring 5 is slightly smaller than the diameter of the metal wire 4. The magnetic ring 5 is attached so as to be rotatable around the small diameter portion 6 as an axis.

FIG. 5 shows still another example of the heating element wire used in the present invention. The heating wire 3 differs from the heating wire of FIG. 4 in that the diameter of the magnetic ring 5 is larger than the diameter of the conductive wire 2. In this case, the magnetic ring 5 is
In order to be rotatable about the axis, a concave portion may be formed in the adjacent conductive element wire.

The heating wires used in the present invention are not limited to those of the above embodiment. Further, the number of heating wires twisted in the outermost layer is not particularly limited, and may be one or all. Further, a groove or a concave portion may be formed on the outer periphery of the magnetic ring.

[0012]

[Effects of the Invention] As described above, according to the present invention, a heating element wire in which a magnetic ring is attached to a metal element wire is twisted in the outermost layer, so that the icing and snow can be reliably generated by the heat generated by the current flowing through the magnetic ring. Can be dissolved. Further, the effect of preventing the formation of icing snow does not deteriorate even after a long period of time.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an overhead transmission line according to an embodiment of the present invention.

FIG. 2 is a side view of the overhead transmission line of FIG.

FIG. 3 is a partially cut-away side view of a heating element wire used for the overhead transmission line in FIG. 1;

FIG. 4 is a partially cutaway side view showing another example of the heating element wire used in the present invention.

FIG. 5 is a partially cutaway side view showing still another example.

[Explanation of symbols]

1: Overhead transmission line 2: Conductive element 3: Heating element
4: Metal wire 5: Magnetic ring 6: Small diameter part

Claims (1)

(57) [Scope of request for utility model registration] 1. An overhead power transmission line, comprising: a heating element comprising a magnetic element and a magnetic ring attached to the element element at predetermined intervals in the longitudinal direction, and twisted into the outermost layer.