JPS61199414A - Mold type connection for cv 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 1 The present invention relates to a molded connection for a CV couple, in particular to an insulated connection for edging an external semiconducting layer.

[Prior art] There are two types of molded connections for CV cables: one is to wrap polyolef-C tape containing a crosslinking agent and crosslink mold it, and the other is to extrude it using an extruder and a molding die. Practical at 154KV, the latter method is about to be applied to lines above 275V. Since these are applied to long lines, twisting is performed at a predetermined length to reduce the circulating current in the sheath, and this is done with an insulated connection part where the outer semiconductive layer of the connection part is cut off. There is.

[Problem to be Solved by the Invention J] A method with excellent workability and electrical performance is required for cutting the edges of the external semiconductive layer at the connection portion. In particular, when edge cutting is performed using a pre-molded unit, a high degree of consideration is required to work on the dimensions and shape of the insulating layer at the connecting portion in order to integrate the unit with the unit. For this reason, there has been a demand for edge trimmers 1 that can be easily installed regardless of the shape of the insulating layer at the connection portion.

Means for Solving Problems 1 The gist of the present invention is to cut the outer semiconducting layer in 1 nick.
~ and l, both have an insulating layer on the inside and a cliff conductor on the outside, both of which have the 1st function of heat shrinkage? 414 formed of two layers of i12 layers, and at least one end of which is folded back to a predetermined curvature.
The reason is that iZ's was used.

That is, in molded connections for CV cables, especially insulated connections that cut off the outer semiconducting layer, the inside is an insulating layer,
At least 6 of the heat-shrinkable Jicoves, each of which is made of two semi-electrical layers on the outside, have a structure in which one end is folded back to the right with a predetermined curvature. An edge cut that was placed in the center of the body.
There is a leek I~, and the edge cutter 21 is folded back to the saw insulating layer on the outside of the connection part? 31i semiconductive layer on the side opposite to the edges 1] - 1 ~. This molded connection part for a CV cable is characterized in that it has a structure in which two opposite ends of the external semiconductive layer of the connection part are connected to the conductive layer 1' (1).

] Effect 1 The edge cutting unit 1 to used in the present invention has a heating convergence line ↑t(
Therefore, regardless of the shape of the connecting portion insulator, the connecting portion is provided in close contact with the insulator. Since the inner layer is an insulating layer and the outer layer is a half-8 conductive layer, the insulating layer is exposed on the outside at the end that is folded back to a predetermined curvature. The semiconducting layer is separated from the mating external semiconducting layer. This work is easy and does not require the sophisticated consideration required in the past.

1 Embodiment] FIG. 1 is a partial cross-sectional view of one embodiment of the present invention. FIG. 2 is a partial cross-sectional view of another embodiment of the present invention. FIG. 2 is a partial cross-sectional view of a structural example of the Z-layer edge cutting unit 1.

Connect the conductors of CV couple 2a and 2b, and change the conductor connection color and
Then, an internal semiconducting layer 1 is provided. The internal semiconductive layer 1 is composed of a semiconductive polyolefin heat-shrinkable coating, a semiconductive rubber, and a polyolefin molded unit l-<r. An insulator layer 5 is provided on the top. The insulator layer 55 is made by laminating and winding poly(nylene ethylene) or sheet 1- containing a chemical cross-linking agent, or by melting it to a predetermined temperature using an extrusion mold using an extruder. It is formed by a so-called mold method such as extrusion molding of polyolefin. Here, a two-layer edge cutter 1-/I having an insulating layer of polyolenoin on the inside and a semiconductive layer 6 of polyolefin on the outside is installed in a predetermined position in the center of the insulating layer 5. Both sides of the single-layer edge cutters 1 to 4 are bent to a predetermined curvature as shown in FIG. As shown in Figure 2, C attached to the lifting platform has a bent part with a curvature only on the <j) side, and the other end has a curvature.
It may also be in a state of −1. Cut the edges of this insulator layer 5]
- An external semiconducting layer 3 is provided on the leek 1 to 4 soils.

The outer semiconductive layer 3 is made of semiconductive polyΔrefin heat-shrinkable material.
or semiconductive polyolefin tapes or molded units.

The ends of the external semiconductive layer 3 of the connection part are placed on the insulating layer 70 of the two-layer edge cutting unit 4 for connection, and the other end of the external semiconductive layer 3 of the connection part is connected to the two-layer edge cutting units 1 to 4. The semi-conducting layer 6''- is multiplied by 1 and connected. With this, it is possible to establish an edge cutting structure.Also, the two-layer edge cutting units 1~/l have a heat shrink function, and depending on the shape of the insulating layer 5 at the connection part. "Can be fixed. In some cases, even if the two-layer edge cutters 1 to 4 do not have a heat shrink function, they can be heated in advance and then cooled and fixed with a shrinkage force of 1 hour. can.

[Effects of the Invention] According to the present invention, regardless of the shape of the insulating layer of the connecting portion, the heat-shrinkable edge cutting unit can be easily installed in close contact with the insulating layer of the connecting portion. Edge cutting with a predetermined curvature - The insulating layer on the folded part of the knit allows for reliable edge cutting. As a result of these features, the present invention makes it possible to easily obtain an insulated connection part with excellent electrical performance and high reliability.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing one embodiment of the present invention. FIG. 2 is a partial sectional view showing another embodiment of the present invention. Figure 3 shows the -
- It is a partial sectional view of a structural example. 1...Inner semiconducting layer. 2a, 2b・CV cable. 3...Outer semiconducting layer of the connection part. 4...Double-layer edge cut unit]・. 5...Insulator layer. 6... Semiconductive layer. 7...Insulating layer.

Claims (1)

[Claims] (1) In molded connections for CV cables, especially insulated connections that cut off the outer semiconducting layer, the inside is an insulating layer,
It has a structure in which at least one end of a heat-shrinkable positive tube consisting of two layers of semi-conductive layers on the outside is folded to have a predetermined curvature, and the heat-shrinkable function of the tube allows the central part of the connection insulator to There is an edge cutting unit formed by laying the edges on the folded insulating layer of the edge cutting unit, and one end of the outer semiconducting layer of the connection part is placed on the semiconducting layer on the opposite side of the edge cutting unit. C, characterized in that it has a structure in which the opposite ends of the external semiconducting layer of the connecting part are connected to each other.
Molded connection part for V cable.