JP2003244833A - Connection part for cv cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection part for a CV cable capable of reducing cost using a simple structure. <P>SOLUTION: A rubber stress corn 25, disposed between an epoxy insulation tube 20a, so attached as to enclose a conductor connection part 17 to which a cable conductor 12, is connected, and a cable insulator 13 is elastically pressurized with a spring unit 30. An interface between the rubber stress corn 25 and the epoxy insulation tube 20a and cable insulator 13 is applied with a planar pressure. There are provided a semiconductive layer 23, provided on the inner surface of the epoxy insulation tube 20a so as be opposed to be conductor connection part 17, and a shielding electrode 22 provided to a position at the end of the semiconductive layer corresponding to the tip of rubber stress cone in the epoxy insulation tube 20a. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CV cable connector, and more particularly to providing a prefabricated terminal or a prefabricated connector (PJ) which has a simple structure and can reduce costs.

[0002]

2. Description of the Related Art A cross-linked polyethylene insulated power cable (hereinafter abbreviated as CV cable) connection work is required to maintain high quality and be completed in a shortest possible time. For this reason, the prefabricated method in which the structure of the insulating part is provided with the reinforced insulating material (epoxy unit etc.), the premolded insulating material and the spring unit can shorten the construction time, Quality control and excellent reliability.
It is used as a V cable connection.

FIG. 3 shows a cross-sectional view of a prefabricated type termination portion which is a typical example of a conventional CV cable connection portion. In the CV cable shown in FIG. 3, the cable conductor 12 exposed from the cable outer semiconductive layer 11 is peeled off for a predetermined length to expose the cable conductor 13, and the cable conductor 13 is exposed.
Is connected to the conductor lead-out rod 14 by a conductor connecting portion 17.

An epoxy porcelain tube 20 having an internal pressure applied to the embedded electrode 22a corresponding to the central portion of the conductor connecting portion 17 is arranged so as to surround the conductor connecting portion 17, and the embedded electrode 2
2a is fixed to the conductor pull-out rod 14 and the conductor fixing metal fitting 24. Further, the shield electrode 21 in the epoxy porcelain tube 20 is
It is arranged so as to surround the semiconductive rubber electrode 26 and reduces the electrical stress on the interface between the epoxy porcelain tube 20 and the rubber stress cone 25 and the semiconductive rubber electrode 26.

Further, in the taper portion on one side of the epoxy porcelain tube 20 (reinforcing insulator), a rubber stress cone 25 and a semi-conductive rubber electrode 2 are formed against a gap formed with the cable.
A premolded insulator of 6 is inserted, and these three insulators are combined to form a prefabricated termination.

The pre-molded insulator fitted in the epoxy porcelain tube 20 is pressed against the epoxy porcelain tube 20 by the spring unit 30 so as to be between the pre-molded insulator and the cable insulator 12 or the pre-molded insulator and the epoxy. A surface pressure of a certain level or more is obtained between the porcelain insulator 20 and the porcelain tube 20, and a predetermined insulating performance is maintained.

Further, a ring-shaped stopper 18 is provided on the outer peripheral surface of the end portion of the cable insulator 12 and sandwiched under the epoxy porcelain tube 20. This stopper 18
This is to prevent the premolded insulator from approaching the embedded electrode 22a of the epoxy porcelain tube 20 more than necessary due to the pressing force.

[0008]

However, in the conventional CV cable connecting portion, the embedded electrode 2 on the high voltage side is used.
Since 2a is an integral part from the tip of the rubber stress cone 25 to the tip of the epoxy porcelain tube 20, the embedded electrode 2
The volume of 2a was large and the cost was high.

The present invention has been made in view of the above points, and can reduce the cost with a simple structure.
The purpose is to provide a connection for a V-cable.

[0010]

The CV cable connecting portion of the present invention is a rubber disposed between a cable insulator and a reinforcing insulator mounted so as to surround the conductor connecting portion to which the cable conductor is connected. In a CV cable connection part configured to elastically press a stress cone with a spring unit to apply surface pressure to the interface between the rubber stress cone and the reinforcing insulator and the cable insulator, the conductor connecting part within the inside surface of the reinforcing insulator It is characterized in that it comprises a semiconductive layer provided on substantially opposed inner surfaces, and a shield electrode provided at an end of the semiconductive layer and at a position corresponding to the tip of the gostress cone in the reinforcing insulator. Further, in the CV cable connecting portion of the present invention, the rubber stress cone arranged between the cable insulator and the reinforcing insulator mounted so as to surround the conductor connecting portion to which the cable conductor is connected is repressed by the spring unit. Then, in the CV cable connecting portion configured to apply surface pressure to the interface between the rubber stress cone and the reinforcing insulator and the cable insulator, the CV cable connecting portion is provided on the inner surface of the inner surface of the reinforcing insulator that is substantially opposite to the conductor connecting portion. It is characterized by comprising a metal pipe and a shield electrode provided at the end of the metal pipe and at a position corresponding to the tip of the gostress cone in the reinforcing insulator.

According to the CV cable connector of the present invention,
Since the semiconductive layer or the metal pipe is provided on the inner surface of the inner surface of the reinforced insulator that is substantially opposite to the conductor connection portion, the structure is simple and the cost can be reduced.

The semiconductive layer is an epoxy type paint. The metal pipe is made of copper or aluminum and has a thickness of 2
It is about 4 mm, and the interface with the reinforcing insulator is sandblasted.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a CV cable connecting portion according to the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of a first embodiment of a CV cable connecting portion of the present invention. The CV cable connection portion of the first embodiment is a CV cable prefabricated type termination portion, and FIG.
Since it is similar to the configuration of the conventional CV cable prefabricated termination shown in FIG. 3, only the configuration different from the configuration shown in FIG. 3 will be described here. The same parts as those shown in FIG. 3 are designated by the same reference numerals in the parts shown in FIG.

In the CV cable connecting portion shown in FIG. 1, a semiconductive paint 23 is provided on the inner surface of the tip of the epoxy porcelain pipe 20a, and a gostress cone 25 at the end of the semiconductive paint 23 and inside the epoxy porcelain pipe 20a. And a shield electrode 22 provided at a position corresponding to the tip of the.

The shield electrode 22 is provided to shield the electric field in the gap at the tip of the gostress cone 25.

The semiconductive paint 23 is usually used as a semiconductive layer of an epoxy product, and is made of an epoxy-based paint. A metal pipe may be used instead of the semi-conductive paint 23. This metal pipe is made of copper or aluminum and has a thickness of about 3 mm.
The interface with a is sandblasted to improve adhesion.

As described above, according to the first embodiment, since the semiconductive paint 23 or the metal pipe is provided on the inner surface of the tip of the epoxy porcelain tube 20a, the volume-embedded embedded electrode 22a is not used. Also, the structure is simple and the cost can be reduced.

FIG. 2 is a sectional view of a second example of the CV cable connecting portion according to the embodiment of the present invention. The CV cable connection portion of the second embodiment is a CV cable prefabricated type connection portion.

In the CV cable shown in FIG. 2, the cable insulator 1 is exposed from the cable outer semiconductive layer 11.
2 is peeled off for a predetermined length to expose the cable conductor 13, and the cable conductor 13 is connected to the counterpart cable conductor 13 by the conductor connecting portion 17.

The epoxy unit 20b (reinforcing insulator) corresponds to the central portion of the conductor connecting portion 17 and is connected to the conductor connecting portion 1.
7 is arranged so as to surround 7, and a semiconductive paint 23 is provided on the inner surface of the epoxy unit 20b facing the conductor connecting portion 17. This semi-conductive paint 23
The shield electrode 22 is provided at the end of the epoxy unit 20b and at the position corresponding to the tip of the rubber stress cone 25 in the epoxy unit 20b.

The shield electrode 21 in the epoxy unit 20b is arranged so as to surround the semiconductive rubber electrode 26, and the epoxy unit 20b and the rubber stress cone 25 are arranged.
The electrical stress on the interface with is reduced.

In addition, in the taper portion on one side of the epoxy unit 20b, with respect to the gap formed between the epoxy unit 20b and the cable,
A premolded insulator including a rubber stress cone 25 and a semiconductive rubber electrode 26 is inserted, and a prefabricated type connection portion is formed by combining these three insulators.

The premolded insulator fitted in the epoxy unit 20b is the spring unit 3
0 is pressed against the epoxy unit 20b to obtain a predetermined surface pressure or more between the premolded insulator and the cable insulator 12 or between the premolded insulator and the epoxy unit 20b, and maintain a predetermined insulation performance. Is configured to.

As described above, according to the second embodiment, since the semiconductive paint 23 or the metal pipe is provided on the inner surface of the epoxy unit 20b which is substantially opposite to the conductor connecting portion 17,
It is not necessary to use the buried electrode 22a having a volume as in the related art, and the structure is simple and the cost can be reduced.

[0026]

As described above, according to the present invention, it is possible to provide a CV cable connecting portion which has a simple structure and can reduce the cost.

[Brief description of drawings]

FIG. 1 is a sectional view of a first example of a CV cable connecting portion according to an embodiment of the present invention.

FIG. 2 is a sectional view of a second example of the CV cable connection portion according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view of a prefabricated terminal part that is a typical example of a conventional CV cable connection part.

[Explanation of symbols]

11 Cable Outer Semi-Conductive Layer 12 Cable Insulator 13 Cable Conductor 14 Conductor Lead-out Bar 17 Conductor Connections 20a, 20a ₁ Epoxy Insulator Tubes 20b, 20b ₁ Epoxy Unit 21 Shielding Electrodes 22, 22a Embedded Electrode 23 Semi-Conductive Paint 24 Conductor Fixing Metal 25 rubber stress cone 26 first semi-conductive rubber electrode 30 spring unit

Claims (4)

[Claims] 1. A rubber stress cone disposed between a cable insulator and a reinforcing insulator mounted so as to surround a conductor connecting portion to which a cable conductor is connected is elastically pressed by a spring unit to reinforce the rubber stress cone. In a CV cable connecting portion configured to apply a surface pressure to an interface between an insulator and a cable insulator, a semi-conductive layer provided on an inner surface of the inner surface of the reinforcing insulator substantially facing the conductor connecting portion, A connecting portion for a CV cable, comprising: a shield electrode provided at an end portion of a conductive layer and at a position corresponding to the tip portion of the gostress cone in the reinforcing insulator. 2. A rubber stress cone disposed between a cable insulator and a reinforcing insulator mounted so as to surround a conductor connecting portion to which a cable conductor is connected is elastically pressed by a spring unit to reinforce the rubber stress cone. In a CV cable connecting portion configured to apply surface pressure to an interface between an insulator and a cable insulator, a metal pipe provided on an inner surface of the inner surface of the reinforcing insulator, which is substantially opposite to the conductor connecting portion, and the metal pipe. A CV cable connection part, comprising: a shield electrode provided at an end and at a position corresponding to the tip of the gostress cone in the reinforcing insulator. 3. The CV cable connecting portion according to claim 1, wherein the semiconductive layer is made of an epoxy-based paint. 4. The CV cable according to claim 2, wherein the metal pipe is made of copper or aluminum and has a thickness of 2 to 4 mm, and the interface with the reinforcing insulator is sandblasted. Connection.