JPS6154813A - Insulating connector of cable - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cable connection, and particularly to its structure. INDUSTRIAL APPLICATION This invention is utilized for the connection of various cables.

[Conventional technology]

Conventionally, various methods are known for connecting cables, but in general, the ends of both cables to be connected are stripped in stages, and the ends of each conductor are made to face each other to form a conductor connecting member. a connecting part connected by the above, a shielding layer that covers the connecting part, an internal electric field relaxation layer that extends to each shielding layer of the dual-wave connection cable and covers the part between them, an insulating layer that covers the outer periphery of the internal electric field relaxation layer, and the above-mentioned connecting part. an outer semiconducting layer that is in close contact with the shielding layer of the cable to be connected on both sides, extending close to each other and covering the above layers, but with edges cut so as not to communicate with each other; and the outer semiconducting layer. It had a laminated structure with a shielding layer covering each layer.

[Problem that the invention seeks to solve]

However, since the outer semiconducting layer is separated in the cable connection part with this structure, the electric field at the tip increases, resulting in a decrease in the insulation performance of the cable.
In addition, the insulating portion of the temple edge has a localized structure, which results in poor machining workability, which tends to cause electrical defects, and also causes problems in that the outer diameter of the connection portion becomes large.

[Means and operations for solving the problems] The present invention solves the above-mentioned problems of the conventional cable connection part, and improves the insulation performance of the cable connection part, and also improves the formation of the cable connection part. The object of the present invention is to provide a novel insulated cable connection that does not require complicated and highly skilled work.

In the present invention, the ends of both cables to be connected are stripped in stages, the ends of each conductor are brought into contact with each other, and connected by a conductor connecting member, and the connecting portion is further covered with a shield layer made of heat-shrinkable tube or tape. , electric field relaxation layer,
It is formed by sequentially stacking an insulating layer and an outer semiconducting layer and heating them. In the 7" cable connection part, the outer semiconductive layer is made of a composite layer of an insulating layer on the inside and a semiconductive layer on the outer layer, covers the underlying insulating layer, and covers the ends or edges of the insulating layer. A cable connection section characterized by having a structure in which the cable connection section is folded back at a position near the cable connection section [Embodiment] The present invention will be described in detail below based on the drawings.

FIG. 1 is a vertical sectional view showing the symmetrical upper half of the cable insulated connection part of the present invention, and shows the cable 1-1.1-
2 is stripped in steps, and the outermost shielding layers 111, 11
2 is peeled off to expose the outer conductive layers 121 and 122, layers 121 and 122 are peeled off to expose the insulating layers 131 and 132, and finally layers 131 and 132 are peeled off to expose the conductor 141.
, 142 are exposed. The ends of the conductors 141 and 142 are brought into contact with each other, and a conductor connecting member 2, usually a conductor connecting tube, is attached to the outer periphery of the conductors 141 and 142.
142 is connected. In another embodiment, the abutted tips may be connected by soldering. Next, a shield layer 3 made of a heat-shrinkable tube or tape is provided over the connecting portion of the conductors 141 and 142, that is, the outer periphery of the conductor connecting tube 2 and the outer periphery of the insulating layers 131 and 132 connected thereto. Next, the above shield: covers layer 3, further insulating layers 13'l, 132, outer conductive layer 121°12
2. An internal electric field relaxation layer 4 covering the shielding layers 111 and 112 is provided. As the material for the layer 4, a heat-shrinkable high-resistance tube is used. An insulating layer 5 covering layer 4 is then provided. The insulating layer 5 can be constructed by stacking several layers of heat-shrinkable tubes or tapes depending on the required insulation thickness. A composite layer 6 of heat-shrinkable tube or tape consisting of an insulating layer on the inside and a semiconducting layer on the outside is placed around the outer circumference of the insulating layer 5, and the end of the insulating layer 5 is folded at or near the end of the insulating layer. It is made into a stripped structure. The tips of the semiconducting layer on the outer surface of layer 5 are thus covered by the inner insulating layer.

A shielding layer 7 is provided around the outer periphery of the composite layer 6 . Like the composite layer 6, the shielding layer 7 extends so as to cover the shielding layer and each layer of the continuation portion of the cable 1-2, and ends before the folded/returned portion of the composite layer 6.

As described above, each layer of heat-shrinkable tube or tape is placed on the conductor connection portion, and is heated to about 110 to 170° C. to shrink, thereby forming each layer into a layer with a tight structure. After this heat treatment, the shielding layer 7 is laminated on the layer 6 using, for example, a metal wire braid or a metal tape, and is fixed with a metal wire 8 if desired. The cable connection portion of the present invention is produced by the above processing operations.

FIG. 2 shows another embodiment similar to that shown in FIG. 1, in which a portion of the insulating layer 5 completely covers the exposed portion of the electric field relaxation layer 4. be.

The composite layer in the present invention is formed by extrusion molding an insulating composition and a semiconductive composition, or by stacking an insulating sheet and a semiconductive notebook and heating them to fuse both sheets.
This is stretched, and if it is in the form of a tube, an insulating tube and a semiconducting tube are overlapped and heated in the same way to fuse both tubes, and then the diameter is expanded to produce a heat-shrinkable sheet or tube. be able to. Furthermore, the composite layer can be easily folded back by folding back the softened portion when the composite layer is heated.

〔Effect of the invention〕

In the cable connecting portion of the present invention, the edge portion of the outermost external semiconductive layer is covered with the insulating layer inside the composite layer, so that the occurrence of electrical defects is alleviated and stable performance is achieved. In addition, forming the connecting portion does not require any particularly sophisticated or skilled work, and the connecting portion can be formed by a normal working method, and the outer diameter of the connecting portion itself can be reduced. The present invention is an extremely excellent invention that provides various practical effects.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a symmetrical upper half of a cable connection according to the invention, and FIG. 2 is a longitudinal sectional view of a symmetrical upper half of another embodiment. 1-1.1-2: Cable, 111, 112: Shielding layer,
121, 122: External conductive layer, 131, 132: Insulating layer, 141, 142': Conductor, 2: Conductor connecting member, 3: Nord layer, 4: Internal electric field relaxation layer, 5: Insulating layer, System 1
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Claims (1)

[Claims] Strip the ends of both cables to be connected, and connect the ends of each conductor with a conductor connecting member, with the tips of the conductors butted against each other, and then add a shield layer made of heat-shrinkable tube or tape to the connecting part, and a shield layer for electric field relaxation. In a cable connection formed by sequentially stacking a layer, an insulating layer, and an outer semiconducting layer and heating the outer semiconducting layer, the outer semiconducting layer is composed of a composite layer of an insulating layer as an inner layer and a semiconducting layer as an outer layer; 1. A cable connection section that covers the insulating layer located at the top of the insulating layer and is folded back at the end of the insulating layer or at a position near the end of the insulating layer.