JP2000299021A - Solid-insulated power cable with corrugated metal cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid insulated power cable with a corrugated metal cover capable of forming a shield layer with one tape head to enhance productivity, arranging copper wires of a copper wire woven fabric tape in one line to reduce cost, and with high economical efficiency. SOLUTION: A copper wire woven fabric tape 3 formed by weaving copper wires in one line on one edge side in the lengthy direction and semi-conductive cushion tape 2 are lapped so as to slip in the width direction to expose the copper wire part of the copper wire woven fabric tape 3, they are lap wound on an outside semi-conductive layer of a cable core 1 to form a shield layer, and a corrugated metal cover (a corrugated aluminum cover 4) is arranged on the shield layer so that the bottom of the corrugated aluminum cover 4 comes in contact with the copper wire part of the copper wire woven fabric tape 3 to form a solid-insulated power cable with corrugated aluminum cover 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid insulated power cable having a corrugated metal cover such as a corrugated aluminum cover or a corrugated copper cover, and more particularly to an improvement in a shielding layer thereof.

[0002]

2. Description of the Related Art FIG. 3 is a schematic longitudinal sectional view of a main part of an example of a conventional solid insulated power cable having a corrugated metal jacket. As shown in the drawing, a semiconductive cushion tape 2 having a semiconductive rubber composition applied to both sides of a base material such as a nonwoven fabric on an outer semiconductive layer of a cable core 1 provided with a solid insulating layer such as cross-linked polyethylene. And a copper wire woven cloth tape 3 in which copper wires 3a are woven in the warp direction in one or more rows, wound in the same direction or the opposite direction to the cushion tape 2. A shielding layer is formed thereon, and a corrugated aluminum cover 4 is further provided thereon so that the bottom thereof is in contact with the copper wire 3a of the copper wire woven cloth tape 3.

[0003]

In the above-mentioned conventional solid insulated power cable having a corrugated aluminum sheath, when a copper wire woven cloth tape in which copper wires are woven in a line is used, the copper wire portion is surely corrugated. Two tape heads are required for manufacturing because a semiconductive cushion tape and a copper wire woven cloth tape are wound in the opposite direction to make a structure that is electrically conductive with a corrugated metal cover such as an aluminum cover. did.

When a single tape head is machined, there are irregularities in the lower layer of the copper wire woven cloth tape. In order to ensure the contact between the copper wire portion of the copper wire woven cloth tape and the corrugated aluminum cover, In addition, it is necessary to use a copper wire woven tape in which a plurality of rows of copper wires are woven in one tape, which increases the cost and is economically disadvantageous.

[0005]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems, improves processing productivity by enabling processing with a single tape head, and reduces the number of copper wires in a copper wire woven cloth tape. To provide a solid insulated power cable having a corrugated metal jacket with the aim of reducing cost by doing
The first feature is that a copper wire woven cloth tape in which a copper wire is woven on one side edge side in the length direction and a semiconductive cushion tape are exposed, and a copper wire portion of the copper wire woven cloth tape is exposed. The shielded layer is formed by wrapping over the outer semiconductive layer of the cable core to form a shielding layer, and the corrugated metal jacket is formed on the copper layer of the copper wire woven cloth tape. A solid insulated power cable having a corrugated metal provided to contact a portion.

A second feature of the present invention is that a copper wire woven cloth tape in which a copper wire is woven in a warp direction and a semiconductive cushion tape are overlapped so that the copper wire woven cloth tape is on top. The composite tape and the semiconductive cushion tape are alternately gap-wound or butt-wound in the same direction on the outer semiconductive layer of the cable core to form a shielding layer, and a corrugated metal coating is formed thereon. A solid insulated power cable having a corrugated metal jacket provided with a bottom portion in contact with a copper wire portion of the copper wire woven cloth tape.

[0007]

FIG. 1 is a schematic longitudinal sectional view of a main part of a specific example of a solid insulated power cable having a corrugated metal jacket such as a corrugated aluminum jacket according to the first feature of the present invention. In the drawings, 1 is a cable core provided with a solid insulating layer such as a cross-linked polyethylene, etc., 2 is a semiconductive cushion tape in which a semiconductive rubber composition is applied to both sides of a base material such as a nonwoven fabric, 3
Is a copper wire woven cloth tape in which copper wires 3a are woven in the warp direction in one row on one side edge in the length direction, and 4 is a corrugated metal cover such as a corrugated aluminum cover.

[0008] The copper wire woven cloth tape 3 and the semiconductive cushion tape 2 are combined with the copper wire 3a of the copper wire woven cloth tape 3.
The portions are shifted in the width direction so as to be exposed so that the portions are exposed, and are wound on the outer semiconductive layer of the cable core 1 to form a shielding layer. A corrugated metal cover 4 such as a corrugated aluminum cover is placed on top of the copper wire 3 of the copper wire woven cloth tape 3.
It is configured so as to contact the portion a.

The corrugated metal-coated insulated power cable of corrugated aluminum or the like having the above-mentioned construction is constructed by superposing a copper wire woven cloth tape and a semiconductive cushion tape on the cable core by shifting them in the width direction. Since the tapes are wrapped, only one tape head is required for manufacturing. In addition, since the lower layer of the copper wire woven cloth tape is stable, the contact between the steel wire portion of the copper wire woven cloth tape and the corrugated metal cover such as the corrugated aluminum cover is ensured. The weaving of the line is only one line,
Economically advantageous.

FIG. 2 is a schematic longitudinal sectional view of a main part of a specific example of a solid insulated power cable having a corrugated metal jacket such as a corrugated aluminum jacket according to the second feature of the present invention. In this specific example, a composite tape in which a copper wire woven cloth tape 3 in which a copper wire 3a is woven in the warp direction and a semiconductive cushion tape 2 are overlapped so that the copper wire woven cloth tape 3 is on top. 5
Then, the shielding layer is formed by alternately winding the semiconductive cushion tape 2 alone and in the same direction on the outer semiconductive layer of the cable core in the same direction as described above.
A corrugated metal cover 4 such as a corrugated aluminum cover is applied thereon so that the bottom thereof contacts the copper wire 3a of the copper wire woven tape 3.

The corrugated metal-coated insulated power cable of corrugated aluminum or the like having the above-mentioned configuration has a structure in which a copper wire woven cloth tape and a semiconductive cushion tape are alternately wound on the cable core in the same direction. In production, only one tape head is required. In addition, the copper wire woven cloth tape is located above the semiconductive cushion tape part, and since the lower layer is stable, contact with the corrugated aluminum cover can be reliably obtained,
The weaving of copper wire is only one line, which is economically advantageous.

[0012]

As described above, according to the solid insulated power cable having the corrugated metal cover such as the corrugated aluminum cover of the present invention, the shield layer can be formed by one tape head. As the productivity is improved and the lower layer of the copper wire woven cloth tape is stable, the copper wire of the copper wire woven cloth tape can secure contact with corrugated metal covering such as corrugated aluminum covering in one row, It is possible to provide a solid insulated power cable having a corrugated metal cover such as a corrugated aluminum cover, which can reduce the cost and is excellent in economy.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of a main part of a specific example of a solid insulated power cable having a corrugated metal jacket such as a corrugated aluminum jacket according to the first feature of the present invention.

FIG. 2 is a schematic longitudinal sectional view of a main part of a specific example of a solid insulated power cable having a corrugated metal cover such as a corrugated aluminum cover according to the second aspect of the present invention;

FIG. 3 is a schematic longitudinal sectional view of a main part of an example of a conventional solid insulated power cable having a corrugated metal cover such as a corrugated aluminum cover;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cable core 2 Semiconductive cushion tape 3 Copper wire woven cloth tape 3a Copper wire 4 Corrugated metal covering such as corrugated aluminum covering

Claims (2)

[Claims] 1. A copper wire woven cloth tape in which copper wires are woven in a line on one side edge side in a length direction and a semiconductive cushion tape, so that a copper wire portion of the copper wire woven cloth tape is exposed. The shielded layer is formed by wrapping over the outer semiconductive layer of the cable core to form a shielding layer, and the corrugated metal cover is applied to the copper wire portion of the copper wire woven cloth tape. A solid insulated power cable having a corrugated metal jacket provided so as to be in contact. 2. A composite tape in which a copper wire woven cloth tape in which a copper wire is woven in a warp direction and a semiconductive cushion tape are overlapped so that the copper wire woven cloth tape is on top, and a semiconductive cushion. A tape and a tape are alternately wound in the same direction on the outer semiconductive layer of the cable core in the same direction by gap or butt winding to form a shielding layer. A solid insulated power cable having a corrugated metal sheath, provided to be in contact with a wire portion.