JPS59132585A - Method of connecting strand insulated conductor for power cable - Google Patents

Abstract

(57) [Abstract] 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 conductors of power cables, particularly strand insulated conductors.

Since bare wire insulated conductors have little skin effect, their practical use as conductors for large-capacity cables is expected, and compression sleeve methods, welding methods, etc. are used as connection methods.

However, in the compression sleeve method, a sleeve made of copper, etc.
The conductor is connected by inserting the conductor into the wire from both ends and compressing the sleeve.However, simply compressing the sleeve does not remove the insulation film on the surface of the wire, so inserting the conductor into the sleeve It is necessary to sandblast the conductor surface or treat it with chemicals beforehand.
It will take a considerable amount of time to connect.

In addition, in the case of welding, the above treatment is necessary because good welding cannot be achieved unless the insulating film on the surface of the wire is removed.
Furthermore, since they use fire, they require special care when handling, which makes them unsightly, and none of them are practical as conductor connection methods.

SUMMARY OF THE INVENTION An object of the present invention is to provide a connection method that eliminates the drawbacks of the prior art described above and allows easy connection of stranded insulated conductors.

That is, in the present invention, when connecting the connection parts of strand insulated conductors for power cables with a sleeve, the two connection parts are connected so that the polished end faces are in contact with each other alone or with a soft metal such as wood metal interposed therebetween. This is a method for connecting a strand insulated conductor for a power cable, which is characterized by inserting the strand into a sleeve, compressing both ends of the sleeve, and then sequentially compressing the sleeve toward the center.

The present invention will be described above with reference to the drawings.

FIG. 1 is an explanatory diagram showing one embodiment of the present invention. The conductor end portion of the connecting portion l of the wire insulated conductor 1 is cut off at right angles, polished with sand, etc., and the side conductor is inserted into the sleeve 2 made of copper or the like so that its end surface is in contact with it. Compression of the sleeve 2 is performed from both ends (A) of the sleeve using a compression die, etc., and compression of the sleeve is performed from both ends (A) of the sleeve.
move in the direction of

When such compression is performed according to the present invention, after the conductor and sleeve are fixed at both ends of the sleeve, the compression of the sleeve is transferred to the center, so the conductor is also compressed accordingly, so the conductor is The sleeve extends toward the center of the sleeve, that is, toward the contact portion of the side conductor, and the side conductor is tightly compressed at its contact end surface.

FIG. 2 is an explanatory diagram showing another embodiment of the present invention, in which a soft metal 3 such as solder or wood metal is interposed at the end of the side conductor 1.1, and the compression is the same as above. Then compress both ends (A) of sleeve 2 and then compress the center part (B) of sleeve 2.
), and the side conductors are firmly connected via the soft metal 3.

The present invention can bring about the following remarkable effects.

0) Since the electrical connection of the conductor is made at its end face,
There is no need to remove the insulating film on the conductor surface when inserting it into the sleeve.

(2) Since the mechanical connection of the conductors is performed by the sleeve, sufficiently high mechanical strength can be obtained at the connection portion.

(3) Compression means used in conventional compression splicing methods can be used.

(4) Work is easier because no flame is used for connection.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are explanatory diagrams 1 showing embodiments of the present invention, respectively. ■ Conductor, 2 Sleeve, 3 Soft metal. Ha・,) Agent Patent Attorney Fujio Sato 3 Brown /1 72 layers

Claims (2)

[Claims] (1) When connecting the connection conductor parts of the strand insulated conductors for power cables with a sleeve, insert both the connection parts into the sleeve so that the polished end faces are in contact with each other alone or with a soft metal interposed between them, and then close the sleeve. 1. A method for connecting a strand insulated conductor for a power cable, comprising compressing both ends of the sleeve, and then sequentially compressing the sleeve toward the center. (2) The method for connecting strand insulated conductors for power cables according to claim (1), wherein the soft metal is a soldered wood metal.