JPS6322614Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to power cables, particularly sleeves for use in connecting bare insulated cable conductors.

In conductors for wire-insulated power cables, in order to reduce contact resistance at connections, the twisted wires are separated one by one, and an insulating coating is applied by chemical treatment or mechanical treatment such as sandblasting. The conductor is removed, the conductor is placed in a metal sleeve having a through hole with the same diameter as the conductor, and the conductor is connected by compressing the sleeve. This is shown in FIG. That is, a wire insulated conductor 1, a through-type sleeve 2
In the case of the connection section, the tip end 3 of the strand insulated conductor 1 in the through-type sleeve 2 has the strand coating removed before being inserted into the sleeve 2. In such a configuration, it takes a long time to separate the wires before the very time-consuming coating removal process, and foreign substances adhere to the conductor during the coating removal process, which infiltrates into the insulator and deteriorates the insulation performance at the connection part. decreases. The foreign substances are chemicals for chemical treatment and sand powder for mechanical treatment, and the latter is particularly problematic. In order to solve this problem, a method has been proposed in which the sand powder is removed by sending compressed air into the connection conductor, but the equipment for this purpose is large and has problems in workability.

An object of the present invention is to provide a metal sleeve assembly for use in conductor connections for bare wire insulated cables, which is inexpensive, reliable, and workable and is equivalent to ordinary bare conductor connections.

The present invention will be explained below based on embodiments shown in the drawings. FIG. 2 is a longitudinal sectional view of the metal sleeve assembly of the present invention, and FIG. 3 is a sectional view taken along the line -- in FIG. In FIG. 2, the metal sleeve assembly of the present invention consists of a metal sleeve 12 and a plurality of metal columns 22. The metal sleeve 12 has a central blind hole 5 extending from both ends, and the bottom 6 of each of these blind holes 5 has a protrusion 7 . A plurality of through holes 8 are provided radially in the husband's blind hole 5. The metal column 22 has a conductor tip 1 with a blind hole 5.
After being inserted into the through holes 8, respectively.

In this state, the metal sleeve assembly is oriented radially inwardly and sleeve 1 as before.
from both ends of the conductor in the direction of contact with the conductor
The state shown in the figure will be reached. That is, by radially inward compression, the metal column 22 penetrates into the conductor 1 and locally exerts a large compressive force, thereby removing the wire insulation coating. Furthermore, the end surfaces of the conductors 1 are joined to each other via the bottom wall 6 due to compression in the contact direction.

As described above, according to the present invention, it is possible to form connections between bare wire insulated cable conductors in an extremely short time, which is equivalent to connecting bare conductors, and to prevent foreign matter from attaching to the connections. It can be prevented.

Further, in the present invention, since the compressive force is applied in the radial direction and the conductor direction, the contact resistance can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view of a conductor connection using a conventional metal sleeve, FIG. 2 is a sectional view showing the metal sleeve assembly of the present application, FIG. 3 is a sectional view taken along the - line in FIG. The figure is a sectional view of a connection using the metal sleeve assembly of the present invention. 1... Conductor, 2, 12... Metal sleeve, 5...
...Blind hole, 6...Bottom wall, 7...Protrusion, 8...Through hole, 22...Metal column.

Claims (1)

[Scope of utility model registration request] It has a central blind hole with a circular center extending from both ends,
A metal sleeve having protrusions on both surfaces of the bottom wall separating the blind holes, and each blind hole having a plurality of radial holes, and a metal sleeve to be inserted into each of the holes. A metal sleeve assembly for connecting bare wire insulated cable conductors, comprising a metal column having a length greater than the wall thickness of the sleeve.