JPH05211709A - Correcting method for connecting portion - Google Patents

Abstract

PURPOSE:To provide a correcting method for a connection portion of an insulated power cable which can prevent the dislocation from axis by securing the center of axis of the connecting portion of the insulated power cable. CONSTITUTION:After exposing a conductor 3 by cutting off an insulation layer 2 of the end of an insulated power cable 1, the conductor 3 is electrically connected to a conductor 3' to be connected, and any deformation at these connecting portion which occurred during the connection between the conductor 3 and the conductor 3' to be connected is corrected by compression in a correcting die 5, by which the conductors 3 and 3' at the connection, other portions of the conductors 3 and 3' and the insulation layers 2 and 2' are all corrected as one united body by the correcting die 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of straightening an insulated power cable connection part.

[0002]

2. Description of the Related Art Conventionally, a cross-linked polyethylene power cable (C
The following method is generally used as a method for rectifying a connection portion between insulated power cables such as a V cable). That is,
As shown in FIG. 3, first, the insulating layers 16 and 16 ′ (coating layers) at the ends of the insulated power cables 15 and 15 ′ are shaved to expose the conductors 17 and 17 ′, and then the conductors 17 and 17 ′ are exposed. 17,1
While sandwiching a part of each of 7'with the connecting sleeve 18, the connecting sleeve 18 is compressed and the conductor 17 and the conductor 17
′ Is electrically connected, and then the connecting sleeve 18 is sandwiched by the straightening die 19 and the straightening die 19
Deformation of conductor 17 and conductor 17 '(bending, etc.)
Is a method of straightening.

[0003]

However, the above-mentioned correction method for the insulated power cable connecting portion has the following problems. That is, in this method, the conductor 17 and the conductor 17 ′ at the portion sandwiched by the connection sleeve 18 are corrected, but the conductors 17 and 17 ′ other than those sandwiched by the connection sleeve 18 (the conductors 17 at both ends of the connection sleeve 18, 1
7 '), and because the insulation layer 16 is insufficiently corrected,
An axis shift occurs in the connecting portion 20, and then the conductor 1
7, 17 'and the insulating tape wound on the insulating layers 16, 16' could not be evenly wound, and the insulation of the connecting portion 20 could not be reliably retained. Also,
Even when the insulating resin is provided on the conductors 17 and 17 'and the insulating layers 16 and 16' instead of the insulating tape, the insulating resin has an uneven thickness, and the same problem as described above occurs.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide an insulation that does not cause the above-mentioned problems and that secures a shaft center of an insulated power cable connecting portion and does not cause shaft misalignment. An object of the present invention is to provide a method for correcting a power cable connection part.

[0005]

In order to achieve the above object, the structure of the present invention is such that after the insulating layer at the end of the insulated power cable is shaved to expose the conductor, the conductor and the conductor to be connected are electrically connected. In the correction method of the insulated power cable connecting portion, the conductor of the connecting portion is connected to the conductor, and thereafter, the deformation of the connecting portion caused when the conductor and the conductor to be connected are connected is compressed and corrected by a correction die. And the conductor other than the connecting portion and the insulating layer are collectively compressed and straightened by a straightening die.

[0006]

[Function] The conductor of the connecting portion, the conductor other than the connecting portion, and the insulating layer of the power cable are all compressed and straightened by the straightening die all at once, so that all can be uniformly compressed and the shaft of the connecting portion can be compressed. The gap will not occur.

[0007]

Embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment of the present invention. In the straightening method of the present embodiment, first, an insulated power cable 1, such as a cross-linked polyethylene power cable (CV cable) 1,
Insulation layers 2 and 2'at the 1'end are cut off to remove the respective conductors 3,
After exposing 3 ', a part of each of the conductors 3 and 3'is sandwiched by a connection sleeve 4 which is a conductor to be connected, and the connection sleeve 4 is compressed to electrically connect the conductor 3 and the conductor 3'. Connect, then connect sleeve 4, and connect sleeve 4
Conductors 3 and 3'at both ends of the conductor (conductors 3 and 3'other than connection parts)
And the insulating layers 2 and 2 ′ are sandwiched between the correction dies 5, and the correction dies 5 are compressed to correct the respective deformations. In this embodiment, the conductor of the connecting portion means the connecting sleeve 4
It means the conductors 3, 3'that are sandwiched by.

As shown in FIG. 1, the straightening die 5 comprises an upper die 6 and a lower die 7, and has insulating layers 2, 2 '.
And the conductors 3 and 3 ′ at both ends of the connection sleeve 4 and the connection sleeve 4 are formed so that the cross-sectional shape thereof conforms to the concavo-convex shape, and by compressing the straightening die 5, insulation is obtained. The layers 2, 2 ′, the conductors 3, 3 ′ on both ends of the connecting sleeve 4 and the connecting sleeve 4 are all straightened simultaneously. As the compression method of the straightening die 5, for example, a hydraulic method is adopted, and only the upper die 6 is compressed with the lower die 7 fixed, or the upper die 6 and the lower die 7 are simultaneously compressed. The method does not matter.

According to the method for straightening the insulated power cable connection portion of this embodiment, the insulating layers 2 and 2 ', the conductors 3 and 3'at both ends of the connection sleeve 4, and the connection sleeve 4 are straightened at the same time. Since the dies 5 are used for straightening, they can be uniformly compressed and straightened, and the misalignment of the connecting portion 8'can be eliminated.

Another embodiment of the present invention is shown in FIG.

In the first embodiment described above, the present invention was used to connect insulated power cables to each other, whereas in the present embodiment, the insulated power cable and the conductor lead-out rod 12 (external terminal) are connected. This is the case. That is, as shown in FIG. 2, after the insulating layer 9 at the end portion of the insulated power cable 8 is shaved to expose the conductor 10, the conductor 10 is sandwiched by a conductor pull-out rod 11 made of copper, which is a conductor to be connected. This is compressed to electrically connect the conductor 10 and the conductor withdrawing rod 11 to each other, and thereafter, the insulating layer 9, the conductor 10 and the conductor withdrawing rod 11 are all sandwiched by the straightening die 12 and straightened. The die 12 is compressed to correct each deformation.
In the present embodiment, the conductor of the connecting portion means the conductor 10 at the portion sandwiched by the conductor pull-out rods 11.

The straightening die 12 is, as shown in FIG.
The straightening die 12 is composed of an upper die 13 and a lower die 14, and is formed so that its cross-sectional shape matches the concavo-convex shape formed by the insulating layer 9, the conductor 10, and the conductor drawing rod 11. By compressing the insulating layer 9
Then, the conductor 10 and the conductor pull-out rod 11 can all be simultaneously corrected. As a compression method of the straightening die 12, for example, a hydraulic method is adopted, and the upper die 13 is compressed while the lower die 14 is fixed, or the upper die 13 and the lower die 14 are simultaneously compressed. Absent.

According to the method for straightening the insulated power cable connection portion of this embodiment, the insulating layer 9, the conductor 10 and the conductor pull-out rod 11 are all straightened at the same time by the straightening die 12. It can be uniformly compressed and straightened, and no axis deviation occurs.

[0015]

According to the method of straightening an insulated power cable connecting portion of the present invention, the conductor of the connecting portion, the conductor other than the connecting portion,
Since the insulating layer and the insulating layer are all compressed and straightened by the straightening die, they can be uniformly compressed and straightened, and axial misalignment does not occur, and the respective axes can be accurately aligned.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing another embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a conventional example.

[Explanation of symbols]

 1,1 'Power cable 2,2' Insulation layer 3,3 'Conductor 4 Connection sleeve 5 Straightening die 6 Upper die 7 Lower die

Claims (1)

[Claims] 1. An insulating layer at an end of an insulated power cable is shaved to expose a conductor, the conductor and a conductor to be connected are electrically connected, and then the conductor and the conductor to be connected are connected. In the method of straightening an insulated power cable connecting portion for compressing and straightening the deformation of these connecting portions caused by a straightening die, the conductor of the connecting portion, and the conductor other than the connecting portion,
A method of straightening an insulated power cable connecting portion, which comprises compressing and straightening all the insulating layers together with a straightening die.