JPH057700Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an electric wire for high frequency transmission, and particularly to an improved structure of the electric wire.

The electric wire according to the present invention is useful as a parallel two-wire feeder line or an antenna element.

[Prior Art] Conventionally, electric wires for transmitting high-frequency current include those in which the inside of a tubular (smooth pipe) conductor is filled with magnesium oxide.

The purpose of filling the inside with magnesium oxide is to give the electric wire tensile strength.

In other words, when tension is applied to a tubular conductor, the tubular conductor is stretched in the longitudinal direction, and the diameter of the tubular conductor also shrinks. Since the diameter can be suppressed, elongation of the tubular conductor can be prevented.

The reason for using magnesium oxide as the material is
This is because its specific gravity is lighter than other insulating fillers.

This conventional method of manufacturing electric wire involves pressing a butt rod against the end face of a cylindrical conductor and pushing out the conductor, forming a tubular conductor into a pipe shape, which is then filled with magnesium oxide. It's a method.

Therefore, in the past, the length of the tubular conductor was limited by the length of the abutment rod.
In addition, the pipe-shaped tubular conductor must be filled with magnesium oxide afterwards.
From the viewpoint of workability, the length of the tubular conductor cannot be made very long.

In addition, in order to manufacture a long product, a tape-shaped conductor is rolled up into a roll and the overlapping parts are welded. A method of inserting a supply pipe for filling magnesium and filling it with magnesium oxide was considered, but there was a risk of magnesium oxide powder leaking from the welded part, so this method had to be abandoned. Nakatsuta.

[Problems to be solved by the invention] As described above, conventional high-frequency current transmission wires have a problem in that the length of each wire is limited due to their structure, making it impossible to manufacture long products. Ta. Furthermore, in order to make the electric wires longer, it is necessary to connect the electric wires to each other, which takes time and effort, and since a connecting portion is provided in the middle, there is a problem in the functional reliability of the electric wires.

An object of the present invention is to provide a high-frequency current transmission wire that can be manufactured in a long length, reduces wire connection work, and improves reliability.

[Means for Solving the Problems] The gist of the present invention is to provide a high-frequency wave generator characterized in that a smooth pipe made of copper or aluminum is used as a conductor, and a corrugated pipe made of iron or stainless steel is arranged in contact with the inner wall of the smooth pipe. Found in electric current transmission wires.

[Embodiment] FIG. 1 is a sectional view of an embodiment of a high-frequency current transmission wire according to the present invention. As shown in the figure, a smooth pipe 1 made of copper or aluminum is used as a conductor, and a corrugated pipe 2 made of iron, stainless steel, etc. is arranged inside the smooth pipe 1. By using copper or aluminum as the conductor, high frequency current transmission efficiency can be improved. The iron or stainless steel used as the corrugated pipe 2 inside has a high tensile strength, so it is resistant to pressure from the side of the pipe, and is suitable for laying electric wires.
Even if tension is applied to the wire main body in the longitudinal direction during installation, the diameter of the smooth pipe 1 can be prevented from decreasing, so that elongation of the wire can be suppressed.

According to the structure of the present invention that combines a smooth pipe and a corrugated pipe, all that is required is to roll the tape-shaped conductor into a roll with the corrugated pipe inside and weld the overlapping parts of the roll-shaped conductor. Long products can be easily manufactured using this manufacturing technology.

[Effects of the invention] According to the invention, it is possible to manufacture long electric wires for high-frequency current transmission, which eliminates or reduces the work of connecting the electric wires, shortens the time required for laying the electric wires, and reduces the time required for laying the electric wires. The wires have become highly reliable in terms of functionality, and the wires are also highly flexible, making it relatively easy to install them in places where it would be difficult to install conventional wires. It has a great effect.

Furthermore, according to the present invention, the smooth pipe is made of copper or aluminum, and the corrugated pipe placed in contact with the smooth pipe is made of iron or stainless steel, so it has excellent transmission efficiency of high-frequency current, and the electric wire It is possible to provide a high-performance high-frequency current transmission wire that also has excellent tensile strength in the longitudinal direction of the main body.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of one embodiment of the high-frequency current transmission electric wire of the present invention. 1...Smooth pipe, 2...Corrugated pipe.

Claims (1)

[Scope of utility model registration request] An electric wire for high-frequency current transmission, characterized in that a smooth pipe made of copper or aluminum is used as a conductor, and a corrugated pipe made of iron or stainless steel is arranged in contact with the inner wall of the smooth pipe.