JPS6073A - Connection unit of rubber and plastic 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 The present invention relates to a rubber/plastic banknote and cable connection Let F'A constructed using a heat-shrinkable tube.

Background Conventionally, mainly in power distribution cables of 22kV or less,
Connections using heat-shrinkable tubes have been put into practical use. In this case, it is also known that a heat-shrinkable tube made of a high dielectric constant layer is provided at the innermost side to reduce the voltage field and reduce the size of the connecting portion.

However, in the conventional case, only a reinforcing insulating layer is constructed using heat-shrinkable tubes, a metal jacket layer is placed on top of the insulation layer, and corrosion protection and storage pipes are provided on top of the insulation layer. There was a need.

Invention No. 1 and Purpose This invention No. 1 is to construct a connection part using a hot acid pB tube in which a high dielectric constant layer, an external semi-q barrier layer and an anti-corrosion layer are formed in one piece. 81 simplifies production forms and shortens assembly time.

In the first embodiment "Figure 1", 10 is a total of one cable, 12L
l-7' conductor, 14 is cable rpt edge + book, 16
18 is the cable metal barrier layer on the outer semiconductor side, and 20 is the cable sheath. ◇ 60 is the connection part, in which the high dielectric constant layer 32, the insulating layer 34, the outer semiconducting layer 36, and the anticorrosion layer 38 are integrated into one. This was borrowed by shrinking the heat-shrinkable resin 30a shown in "Figure 2".

The high dielectric constant layer 32a of the heat-shrinkable tube 30a is made of, for example, cross-linked polyethylene or BP rubber as a base and mixed with carbon or titanium oxide nanopowder.

Further, the insulation G 34 a is made of crosslinked polyethylene or EP rubber.

Further, the external half 4 Yakutan J36a is made of a cross-linked polyethylene or EP rubber base mixed with carbon powder, etc., and the anti-corrosion PNJ38a is made of polyethylene, chloroprene, etc.

The above tKj is formed into one piece. To make each, for example, by a multilayer extruder, the l! , layers are simultaneously extruded and heat-shrinkable.

Note that before shrinking the heat-shrinkable tube 30a, tape wrapping 840 is applied to fill in the valleys.

Further, 42 is a shielding wire for electrically connecting the left and right cable full bend shielding fF'j18. This is made of, for example, copper wire, which is wound around one cable metal shield 18, spirally wound over the connection 30, and then wrapped again around the cable metal shield 18 on the opposite side.

Although only one shielding wire 42 is shown in FIG. 1, there are actually many shielding wires.

Further, reference numeral 44 denotes a tape-wrapped layer, which is provided for moisture-proofing the end portion of the connecting portion 60.

Second Embodiment In the above case, it was necessary to shrink the heat-shrinkable tube 30a and then install the plastic wire 42, but in this embodiment, that step is no longer necessary.

That is, in this case, a heat shrink tube 30b as shown in "Fig. 3" is used.

This heat-shrinkable tube 30b also includes a high dielectric constant layer 32b, an insulating layer 64b, an outer semiconducting layer 36b, and an anticorrosive layer 38b in the same manner as described above, but also includes a flexible wire 67.

This flexible wire 67 is made of, for example, copper wire,
Embedded in the external semiconductor layer 66b or external semiconductor f
It is inserted between the f1 layer 36b and the anticorrosion layer 38b. In this case, the tube is inserted into a corrugated shape as shown in FIG. 3, but by doing so, it is possible to follow changes in the length direction of the shrink tube during heat contraction, and the flexibility against bending is improved.

"Figure 1" (1) shows the connection part 60 made by shrinking the heat shrink tube 30b.

In this case, the copper wire 46 connects the flexible wire 67 embedded in the heat-shrinkable tube 30b and the cable gold shielding layer 18 of the cable 10.

Yuanmen effect Heat-shrinkable tube that includes the anti-corrosion layer in advance.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the first embodiment of the present invention, FIG. 2 is an explanatory diagram of the heat shrink tube 30a, FIG. 3 is an explanatory diagram of the heat shrink tube 30b in the second invention, and FIG. A sectional view of the second embodiment. 10: Cable 18: Cable metal shielding layer 20: Cable sheath 60: Connection portion 30 a s 30 b 'Heat shrink tube 32% 3
2 as 32b: High dielectric constant layer 34.34 a% 3
4b: fa edge layer 36136a-T36b: outer half R
) tL N-f68.38 a N 38 b : Anti-corrosion layer 67 : Jahei wire 42 : Shiyahei wire Patent applicant Fujikura T! 1. Agent Keiji Kaihei JlKl Figure 2 Figure 0b Figure 3 Continued from page 1 0 Author: Isao Mizunuma Fujikura Electric Wire Co., Ltd., 5-1 Kiba-chome, Koto-ku, Tokyo 0 Author: Kataoka Fujikura Electric Cable Co., Ltd., 1-5-1 Kiba, Koto-ku, Tokyo

Claims (2)

[Claims] (1) From the inside to the outside, the high dielectric constant m1 insulating layer, the external ECG layer, and the anticorrosive layer are formed in one piece.
- A jujube joint of a rubber/plastic cable characterized by being made by shrinking a shrink tube into 11 folds. (2) The rubber 0 plastic cable according to claim 1, wherein the external semiconductor 'RM has a shielding wire buried inside or provided in contact with the external surface. connection part.