JPS60249278A - Method of connecting strand insulating conductor - 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 method for connecting electric power cable conductors provided with wire insulation.

Traditionally, in order to connect bare wire insulated conductors, the insulating film is removed by blasting or using chemicals, and then the conductors are connected.

However, this is time-consuming and there is also the risk of damaging the cable insulation and sheath. Therefore,
A method for connecting without removing the insulation film has also been announced,
These include:

(1) After putting metal particles between the wires, they are compressed with a sleeve.

Then, the metal particles destroy the insulating film, and the surfaces of the wires come into electrical contact through the metal particles (Japanese Patent Laid-Open No. 57-1
No. 8511183).

(2) Weld the end faces of the cable conductors, remove the insulation film on the surface of the cable conductor ends, and connect them by compression with a sleeve.

Then, the current flowing through the wire in the inner layer passes through the weld on the end face to the weld on the other side of the sleep pull and flows into the wire (Japanese Patent Laid-Open No. 57-212791).

However, the method described in ``2'' may be insufficient in terms of electrical performance.

The object of the present invention is to provide a method that allows electrical connections to be made at all times.

Moxibustion precautions As shown in Figures 1 to 6, the insulation film on the surface of the cable end is removed, the wires at the end of the cable are opened, and metal particles 16 are inserted between the wires.
After that, the portion filled with metal particles 16 is compressed to return the cable conductor 10 to its original thickness.

After that, the end surface of the cable conductor 10! 112 are welded and integrated, and the end faces of the welded parts 18 are finished flat, and the flat finished faces of the welded parts 18 are butted together in the sleeve 20, with both sides of the sleeve first, and the central part is characterized in that it is then compressed and connected.

This invention is directed to cable conductors insulated with copper oxide, enamel, or the like.

(1) First, as shown in FIG. 1, the insulating film on the surface of the portion of the cable conductor 10 that will later be compressed into a sleeve is removed using, for example, a wire brush 14.

(2) Next, as shown in FIG. 2, the space between the strands 12 is slightly opened and metal particles 16 are filled.

Metal particles have sizes ranging from lO to 100JLIl,
Use a material with sharp edges like cut copper powder. In addition, electrolytic copper powder becomes grape-shaped particles like bunches of grapes,
It is mechanically brittle and has insufficient ability to embed in wire conductors.

The material to be used is the same as that of the cable conductor, or one that does not exhibit a corrosive reaction with the cable conductor and has good conductivity, such as copper or iron.

(3) Next, as shown in Figure 3, compress the open part of the cable conductor lO to return it to its original thickness.

(4) Then, as shown in FIG. 4, the end face of the cable conductor IO is welded 18. Then, all the wires 12 are electrically connected and integrated. Welding is silver brazing, TIG
, MIG, or soldering.

(5) Finish the end face of the welded portion 18 into a flat surface.

(6) Then, as shown in FIG.
Attach the flat end faces of step 8 so that they are completely in contact with each other.

(7) Move the sleeve 20 to the center of the conductor mating portion and compress it (Fig. 6).

Compression is performed on both sides first (■■ in Figure 6),
Leave the center part behind (■ in the same figure). This ensures that the ends of the cable conductors 10 meet completely and butt against each other, allowing current to flow through them (normal sleeve compression starts in the middle). (The abutting portions of the conductor end faces are separated).

Further, the strands 12 are also connected to the metal particles 16 as in the conventional case.
make electrical contact with each other via.

Therefore, excellent electrical performance is always obtained.

Elm and a pot (1) Excellent electrical performance can be reliably obtained as described above.

(2) Does not require large-scale equipment or machinery.

(3) Since no chemical aqueous solution is used, there is no damage to the cable side (insulator, conductor, sheath, etc.).

(4) - When the sleeve 20 is compressed from both sides as described above, the cable conductor 10 is elongated in the length direction, and the welded portions 18 on the end faces are brought into strong contact with each other.

This ensures that only electrical contact is sufficient, and that the weld 1 on the end face
Current also flows through 8.

As described above, since the present invention electrically covers the following three points as a current path, it can compensate for all the drawbacks of the conventionally proposed methods.

1) As shown by ■ in Figure 7, it flows through the interface between the sleeve and the conductor.

2) As shown by ■ in Figure 7, it flows between the strands.

3) As shown in Figure 7 (■), it flows through the conductor end abutment.

[Brief explanation of drawings]

FIGS. 1 to 6 are explanatory diagrams showing the method of the present invention in order of steps. FIG. 7 is an explanatory diagram of the current path. lO: Cable conductor 12: Element wire 16 + metal particles 18: Welded portion 20 Nisleeve Patent applicant Fujikura Electric Cable Co., Ltd. Agent Kei Kunihira Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] The insulating film on the surface of the cable end is removed, the wires at the end of the cable are opened, metal particles are filled between the wires, and then the part filled with metal particles is compressed. and return the cable conductor to its original thickness. Thereafter, the strands 12 on the end surfaces of the cable conductors are welded and integrated, the end surfaces of the welded portions are finished flat, the flat surfaces of the welded portions are butted together in the sleeve, and both sides of the sleeve are A method for connecting bare wire insulated conductors, characterized in that the central part is compressed first and then the central part is compressed and connected.