JP2558904Y2 - Power and optical composite submarine cable connection - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The invention relates to electric power and optical composite submarine cables at a factory joint.

(Prior Art) Generally, a submarine power cable is a long cable of a series length by a factory joint. Similarly, in the case of power and optical composite submarine cables, a power and optical composite cable manufactured in a fixed length is first connected to a power cable main body at a factory, and an optical fiber is connected at the same location as the connection portion or in the vicinity thereof. Units are connected to form a series of lengths, and this is attached in a spiral or SZ shape on the connection portion of the power cable, and a plastic reinforcing layer such as polyethylene is formed thereon to form a series of lengths of power and light. A submarine cable with a composite cable and iron wire exterior on the outside.

FIG. 3 is a cross-sectional view of an example of a connection portion of a power / optical composite cable in a conventional factory joint. In the drawing, (1) is a cable core connection portion connected to the core of the power cable of the main body with substantially the same diameter, and (2) is a lead portion of the connection portion.
A plastic in which a plurality of optical fiber units (4) are spirally or SZ-shaped along the lead portion (2), and a wound layer of a plastic tape such as polyethylene is pressure-molded thereon. The reinforcing layer (5) is applied to form a series of electric power and optical composite cable, and the outer side of the electric power and optical composite cable is provided with an iron wire sheath in which a number of iron wires are twisted through a seat floor layer or the like. Power and optical composite submarine cables.

In addition, claims for utility model registration of microfilms of Japanese Utility Model Application No. 58-42190 (Japanese Utility Model Application No. 59-149430) include electric power,
At the connection portion of the optical composite cable, an extra length of the optical fiber housing sleeve having a large number of protrusions protruding from the surface is attached to the outer periphery of the connection portion, and the optical fiber is connected on the sleeve surface, and the optical fiber There is a description of a connecting portion structure in which the extra length is extended over a protrusion on the surface of the sleeve, and is covered therewith by a cover.

(Problem to be Solved) In the conventional connecting portion shown in FIG. 3, an external pressure acts on the optical fiber unit (4) when the plastic reinforcing layer (5) applied to the outside of the optical fiber unit (4) is molded. Then, the optical fiber unit (4) is pressed and becomes immovable, and is restrained when the cable is bent.
There is a problem that buckling and the like occur.

Also, in the connection structure described in the microfilm of Japanese Utility Model Application No. 58-42190 (Japanese Utility Model Application No. 59-149430), the extra length of the optical fiber storage sleeve is attached to the outer periphery of the connection, so the sleeve is connected. It may have a curved surface that matches the outer peripheral surface of the part. For this reason, there is a trouble that a sleeve having a curved surface matching the outer peripheral surface of the connecting portion must be prepared each time.

(Means for Solving the Problems) The present invention provides a connection portion for an electric power and optical submarine cable that solves the above-mentioned problems, and the feature thereof is that an arc-shaped inner surface is provided outside the power cable connection portion. A plurality of split covers having a plurality of protrusions whose length and interval are larger than the diameter of the optical fiber cable are arranged with the protrusions inside,
The optical fiber unit is housed between the projections of the split cover, and the optical fiber unit is housed movably between the projections of the split cover. Further, the division cover is made transparent.

(Embodiment) FIG. 1 is a cross-sectional view of a specific example of the connecting portion of the present invention.
In the drawing, the same symbols as those in FIG. 3 represent the same parts.

As shown in the drawing, on the outside of the power cable connection portion provided with the connection lead sheath (2) on the cable core connection portion (1),
If necessary, a plurality of divided covers (3) having a plurality of projections (31) formed in the length direction and the circumferential direction on the inner surface having a circular cross section as shown in FIG. The optical fiber unit (4) is arranged between the projections (31) of the split cover so that the optical fiber unit (4) can move freely. Then, a plastic reinforcing layer (5) by a mold is applied to the outside as in the conventional case.

The split cover (3) has an arcuate cross section obtained by equally dividing a cylindrical body, and is used in two or more divisions, preferably four or more divisions so as to follow the bending of the cable, and also divided in the length direction. Is good. In this case, it is preferable that the width (A) and the length (B) in the circumferential direction satisfy B / A ≦ 3.
As the material of the split cover (3), metal, heat-resistant plastic or the like is used, but it may be bent from a plate shape to an arc shape, and furthermore, the state of the optical fiber unit (4) housed therein. It is desirable to form it with a transparent plastic such as nylon so that it can be easily observed.

(Effects of the Invention) As described above, according to the power and optical composite submarine cable of the present invention, the optical fiber unit is housed between the protrusions inside the split cover, so that the optical fiber unit is freely restrained without any restriction. It is in a state where it can move, and an abnormality such as buckling does not occur, and a highly reliable connection portion can be obtained. In addition, the split cover has dimensional flexibility for the optical fiber unit and is easy to bend from a plate shape, so it is not necessary to arrange concentric circles for the power cable connection part. Since connection work is possible,
Cost can be reduced. Furthermore, if the optical fiber units are not arranged all around the cable,
Only the optical fiber unit needs to be covered with the split cover. As a result, it is not necessary to cover the split cover all around the connecting portion, so that the connection operation can be performed with a smaller number of products.

Further, since the split cover is transparent, it is easy to observe the optical fiber unit.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a specific example of an electric submarine cable according to the present invention, and FIG. 2 is a perspective view showing an inner surface of a specific example of a split cover used in the present invention. FIG. 3 is a cross-sectional view of an example of a conventional connecting portion. 1 ... cable core connection part, 2 ... lead part of the connection part, 3 ...
Divided cover, 31 ... Projection, 4 ... Optical fiber unit,
5 ... Plastic reinforcement layer.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Hiroyuki Kimura 1-3-1 Shimaya, Konohana-ku, Osaka-shi, Osaka Prefecture Inside the Osaka Works, Sumitomo Electric Industries, Ltd. (72) Masayoshi Yamaguchi 1 Shimaya, Konohana-ku, Osaka-shi, Osaka No. 1-3, Sumitomo Electric Industries, Ltd., Osaka Works (56) References Japanese Utility Model Sho-59-141427 (JP, U) Japanese Utility Model Sho 59-149430 (JP, U)

Claims (2)

(57) [Scope of request for utility model registration] 1. A plurality of split covers each having a plurality of protrusions having a length and an interval larger than the diameter of an optical fiber unit formed on an inner surface of an arc shape outside the power cable connection portion, with the protrusions being inside. A connection portion for a combined power and optical submarine cable, wherein the optical fiber unit is housed between the projections of the split cover. 2. A connection part for a combined submarine power cable according to claim 1, wherein the divisional cover is transparent.