JPH0753814Y2 - Plasma torch cable - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a cable in which a high-frequency current wire used for a plasma torch, a power wire, a control wire, a plasma gas conduit, etc. are inserted. is there.

[0002]

2. Description of the Related Art As shown in FIG. 2, a conventional cable of this type has a high-frequency current wire 12, a power wire 13, a control wire 14 and a plasma gas conduit 1 in an outer jacket 11.
5 and the like were inserted so as to be movable relative to each other while taking proper positions.

[0003]

[Problems to be Solved by the Invention] The plasma torch cable as described above has a high-frequency current wire-12.
Since the high-voltage current from the wire has a large effect on other electric wires, it is necessary to enhance the withstand voltage insulation of the high-frequency current wire 12 and inevitably a thick insulating layer will be used. -Bull has a large diameter and each wire-
And the wires move relative to each other and are unstable and difficult to handle.
There is a problem of becoming a bull.

The present invention has been made in view of the above problems, and an object of the present invention is to separate a high-frequency current wire from other electric wires to form a thin insulating layer as a whole. With a small diameter cable,
It is intended to provide a stable and easy-to-handle cable by fixing each wire and the whole electric wire and the like by using a tape.

[0005]

In order to achieve the above object, a plasma torch cable according to the present invention has a plasma gas conduit at its central portion and at least a high-frequency current wire at its outer periphery. High-frequency current wire, power wire and control wire are placed with an insulating dame tube interposed between them and other wires, and a tape is wound around the entire circumference of these wires. It is characterized by being covered with a cloak.

[0006]

[Operation] A plasma torch case constructed as described above
Since it is a bull, the influence of the high-voltage current from the high-frequency current wire is weakened by the insulating dummy tube adjacent to the high-frequency current wire, so that the high-voltage current does not affect other electric wires and the like.
Further, since the wires and electric wires on the outer periphery of the plasma gas conduit are fixed by the tape as a whole, these wires and electric wires do not move relative to each other.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. FIG. 1 is a sectional view of a plasma torch cable according to the present invention, and 1 is a plasma gas conduit.
It is located in the center of Bull. Two high-frequency current wires 2 covered with an insulating layer, four power wires 3 and two control wires 4 are arranged around the plasma gas conduit 1.

Insulating dummy tubes 5 are arranged at both ends of the high-frequency current wire 2 to separate the high-frequency current wire 2 from other electric wires 3 and 4. There is. The power wires 3 and the control wires 4 are divided into four or two in order to balance the inside of the cable, but they may be arranged in any number.

Further, each dame tube 5, each wire 2 and each electric wire 3, 4 arranged on the outer circumference of the plasma gas conduit 1 as a whole have a cotton weave cloth tape on the outer circumference.
It is wound with a loop 6 and is fixed so that the respective dummy tubes 5, the respective wires 2 and the electric wires 3, 4 are prevented from moving relative to each other. The cloth tape 6 is protected by an outer jacket 7, which serves as the outer surface of the cable.

In the embodiment having the above-mentioned structure, the influence of the high-voltage current from the high-frequency current wire 2 is weakened by the insulating dummy tube 5 adjacent to the high-frequency current wire 2, and the other electric wires 3, 4 etc. Since the influence of the high-voltage current is not exerted, it is not necessary to thicken the insulating layer to increase the diameter so as to enhance the withstand voltage of the high-frequency current wire 2 itself as in the conventional one. Things can be used. Further, since the respective dummy tubes 5, the respective wires 2 and the electric wires 3, 4 are fixed by the cloth tape 6 as a whole on the outer periphery of the plasma gas conduit 1, these wires
Also, the electric wires and the like do not move with each other.

In the above embodiment, the description has been made assuming that the dummy tubes 5 are arranged only at both ends of the high frequency current wire 2, but the dummy tube 5 is used for both high frequency current wires 2. You may add and arrange also between them. Further, when the synthetic fiber-based insulating filler 8 is filled around the dummy tubes 5, the wires 2 and the electric wires 3, 4, etc., the synthetic fiber-based insulating fillers 8 are filled with the synthetic fiber-based insulating filler 8. It is possible to further prevent mutual movement of the cables, wires, and electric wires and increase the mutual insulation.

[0012]

The plasma torch cable according to the present invention is constructed so that the high frequency current wire is separated from other electric wires by the dummy tube. Since it is not necessary to increase the voltage and the insulating layer can be thin, the high-frequency current wire has a small diameter, and the overall cable can have a small diameter.

Further, since the outer circumferences of the wire, the tube and the electric wire are fixed by the tape as a whole, the wire, the electric wire and the like do not move relative to each other, so that the case is stable and easy to handle. Become a bull.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a plasma torch cable according to the present invention.

FIG. 2 is a sectional view of a conventional plasma torch cable.

[Explanation of symbols]

 1 plasma gas conduit 2 high frequency current wire 3 power wire 4 control wire 5 dame tube 6 tape 7 mantle

Claims (1)

[Scope of utility model registration request] 1. In a plasma torch cable in which a high-frequency current wire, a power wire, a control wire, and a plasma gas conduit are inserted, a plasma gas conduit is arranged at a central portion, At least the high-frequency current wire, the power wire, and the control wire are arranged around the high-frequency current wire and other wires with an insulating dummy tube interposed between them. A plasma torch case characterized by winding a tape around the outer circumference and covering it with a jacket.
Bull.