JP2003158815A - Armored middle connected part of double-armored submarine cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain an armored middle connecting method of double-armored submarine cable capable of sufficiently fixing an FRP wire without damaging the FRP wire and lowering the strength of thereof, in the armored middle connecting method of double-armored submarine cable. SOLUTION: In this armored middle connecting method of the double-armored submarine cable 20, the FRP wire 5 having polyethylene covering 6 is arranged in the inner armored body, and iron wires 9 are arranged in the outer armored body. The FRP wire 5 is inserted into and fixed to a hollow part of an FRP fixing rod 11 provided with a threaded part 12 and the hollow part applied with an adhesive on the front end thereof. The threaded part 12 of the FRP fixing rod tightens a support clamp 14 with a fixing nut 13, and secures and holds only the inner armored body. The iron wires 9 constructing the outer armored body, of which the lengths are aligned, are bounded by a binding wire 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an armored intermediate connecting portion of a double armored submarine cable in which the outer circumference of a cable body is double armored by an inner armor body and an outer armor body. is there.

[0002]

2. Description of the Related Art Conventionally, various methods have been proposed for connecting double-armor submarine cables in which the outer circumference of a cable body is double-armored with an inner armor body and an outer armor body.

FIG. 7 is a diagram showing a conventional example in which double-armor submarine cables are connected to each other. The outer armor body 1 made of the iron wire 112 is used for connecting the double armor submarine cables with the fasteners 115 provided on both sides of the intermediate connection portion 114.
As for the end of 04, the wedge ring 118 is attached to the terminal side of each iron wire 112.
It is wound so as to be folded back into the tension member 116 and is fitted into the tapered hole 119a of the receiving ring 119 fixed to the tension member 116 so as to sandwich the folded portion of each iron wire 112, and the annular locking member 120 fixed to the tension member 116, It is locked by a wedge type locking tool 115A which is locked and locked by 121. The end portion of the inner armor body 103 made of the FRP wire 109 has a threaded rod 132 whose proximal end is connected to the end of each FRP wire 109 by a crimp fitting 131.
And a plurality of holes 1 fixed to the tension member 116.
The fixing member 134 having 33 and the screw rods 132 respectively passed through the holes 133 of the fixing member 134 are fixed to the fixing member 134 by being screwed with nuts 135 and 136.

[0004]

However, in the conventional armor intermediate connection method for a double armor submarine cable, the FRP wire is mechanically crimped, which may damage the FRP wire and reduce the strength of the FRP wire. There is a problem.

Therefore, according to the present invention, in the armoring intermediate connecting method for the double armoring submarine cable, the FRP wire is surely prevented from being damaged or the strength of the FRP wire being reduced.
It is an object of the present invention to obtain an armor intermediate connection method for a double armor submarine cable that can fix the RP line.

[0006]

In order to achieve the above-mentioned object, the present invention is the invention of claim 1, wherein the FRP wire is arranged on the inner armor body and the iron wire is arranged on the outer armor body. In the method for connecting the armored submarine cable, the first step of adhering and fixing the FRP wire to an FRP fixing rod having a threaded portion at the tip, and the screw portion of the FRP fixing rod to a support clamp and a nut. There is provided a method for connecting an armored intermediate of a double armored submarine cable, characterized in that the method has a second step of fastening.

According to a second aspect of the present invention, in the method for connecting the double-armor submarine cable in which the FRP wire is arranged on the inner armor body and the iron wire is arranged on the outer armor body, the threaded portion is provided at the tip. A first step of adhering and fixing the FRP wire to the FRP fixing rod, a second step of fastening the screw part of the FRP fixing rod to a support clamp with a nut, and not fixing the iron wire to the support clamp. There is provided a third armoring intermediate connection method for a double armored submarine cable, which comprises a third step of cutting at the end and fixing to the cable outer peripheral surface.

According to a third aspect of the present invention, in the first step, a step of preparing the FRP fixing rod having a hollow portion into which the FRP wire is inserted is provided at an end portion, and an adhesive is applied to the hollow portion. A method for connecting an armored intermediate of a double armored submarine cable characterized by including steps.

According to a fourth aspect of the present invention, in the first step, after the FRP wire is inserted into the hollow portion of the FRP fixing rod, a tape winding or shrinking tube is used to join the fixing rod and the FRP wire. Provided is a method for connecting an armored intermediate of a double armored submarine cable, characterized by including a step of covering an outer circumference.

According to a fifth aspect of the present invention, the first step includes a step of preparing the FRP fixing rod having a hollow portion whose opening side diameter is larger than the inner diameter of the hollow portion. A double-armor submarine cable armor intermediate connection method is provided.

In a sixth aspect of the present invention, the first step includes a step of preparing the FRP fixing rod in which an inner peripheral surface of the hollow portion is threaded and an air vent is provided in the hollow portion. A method for connecting an armored intermediate of a double armored submarine cable is provided.

According to a seventh aspect of the present invention, in the second step, the double armor is constructed by combining two support clamps having insertion holes for fastening half of the FRP wires of the double armor submarine cable. A method for connecting an armored intermediate of a double armored submarine cable, comprising the step of fastening all the FRP wires of the submarine cable.

In the invention of claim 8, the second step includes a step of fastening the threaded portion of the FRP fixing rod to the support clamp whose surface on which the nut contacts is angled with a nut. There is provided a method for connecting an armored intermediate of a double armored submarine cable characterized by the following.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing an example of a double armored submarine cable used for implementing the present invention. The double-armed submarine cable 20 has a three-phase cable that surrounds the power line 1
After being filled with, the outer circumference of the seat 3 is covered with a seat 3, the outer circumference of the seat 3 is double-armored with an inner armor body 4 and an outer armor body 8, and the outermost side is covered with an exterior 10. . A seat 7 is provided between the inner armor body 4 and the outer armor body 8.

The inner armor body 4 is composed of a large number of FRP wires 5 coated with polyethylene 6, and the outer armor body 8 is composed of a large number of iron wires 9.

The cable power line 1 is composed of an insulator, a conductor, etc., but details thereof are omitted.

FIG. 2 is a diagram showing an intermediate connecting portion of the double armor submarine cable of the present invention, FIG. 3 is an explanatory view of the intermediate connecting portion of the inner armor body, and FIG. 4 is an enlarged sectional view of the FRP fixing rod. 5 is a view showing a support clamp, and FIG. 6 is a schematic view showing a state in which the screw portion of the FRP fixing rod is attached to the support clamp.

Near the end of the double armored submarine cable 20,
First, the outer casing 10 is peeled off. The iron wires 9 constituting the outer armor body 8 that have appeared are made uniform in length and bundled with a binding wire 30 in the circumferential direction so that the iron wires 9 do not spread. The seat 7 on the inner side of the iron wire 9 is stripped off to expose the FRP wire 5 having the polyethylene coating 6 and constituting the inner armor body 4. The polyethylene coating 6 is stripped off to expose the FRP wire 5 for a predetermined length. The FRP wire 5 is the adhesive 1 of the FRP fixing rod 11.
8 is inserted in the hollow part 19 coated.

At this time, the FRP wire insertion side 1 of the hollow portion 19
If the diameter of 9a is increased, the FRP wire 5 can be easily inserted. After the FRP wire is inserted, the FRP wire 5 including the FRP wire insertion side 19a of the hollow portion 19 is covered with tape or shrink tape. This improves the water resistance of the FRP wire 5. If the inner wall of the hollow portion 19 is threaded,
The adhesiveness between the RP wire 5 and the FRP fixing rod 11 is enhanced. Further, if the air vent 19b is provided in the hollow portion 19, air does not stay inside the hollow portion 19 when the adhesive 18 is applied or when the FRP wire 5 is inserted, so that the adhesiveness is improved.

After the adhesive 18 is dried, the fixing nut 13 is arranged on the screw portion 12 at the tip of the FRP fixing rod 11, and the screw portion 12 is inserted into the insertion hole 15 of the support clamp 14.
The fixing nut 13 is arranged on the inserted screw portion 12. The support clamp 14 is fastened with the fixing nuts 13, 13. At this time, loosening can be prevented by using a plurality of fixing nuts 13.

The embodiment of the present invention uses FRP with an adhesive.
Although the method of fixing the wire and the FRP fixing rod has been described, the FRP wire may be fixed by another method that does not damage the FRP wire, for example, by welding.

As shown in FIG. 4, the insertion holes 15 of the support clamp 14 are arranged in two rows in the circumferential direction, and the FRP wire of the submarine cable is pulled out to the outside.
2 is fastened to the support clamp 14, the fixing nut 13
There is a risk that the surface of the support clamp that comes into contact with the support clamp 14 and the support clamp 14 form an angle (see FIG. 2), and the fastening is insufficient.
Therefore, by making the angle α on the nut receiving surface 15a of the support clamp 14, it is possible to prevent insufficient fastening. The angle α differs depending on whether the insertion hole is inside or outside in the radial direction, the angle of pulling out the FRP wire, or the like.

The support clamp 14 is the same as that shown in FIG.
By connecting them individually, the FRP wire can be fastened over the entire circumference of the cable. That is, the support clamp 14 is
Fasten half of the RP wire and the other clamps to the remaining FRP
Fasten the lines. Since it is divided into two, the support clamp can be attached even after the cable power lines have been connected to each other, and the efficiency of the cable connection work can be improved.

Although not shown in FIG. 2, the other double armored submarine cable similarly processes the outer armor body and the inner armor body. By connecting the support clamp that fastens the FRP wire around the entire circumference of the cable and the other support clamp with the support bolt 17, fasten the support clamp with the fixing nuts 16 and 16 and perform waterproof treatment, etc. Connect the cable.

[0026]

As described above, according to the present invention,
Since the FRP fixing rod was fixed to the FRP wire with an adhesive and the support clamp was fastened with the screw part at the tip of the FRP fixing rod,
The FRP wire could be sufficiently fixed without damaging the wire and without lowering the strength of the FRP wire.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a double armored submarine cable used for implementing the present invention.

FIG. 2 is a view showing an intermediate connecting portion of a double armored submarine cable used for implementing the present invention.

FIG. 3 is an explanatory diagram of an intermediate connecting portion of the inner armor body.

FIG. 4 is an enlarged sectional view of an FRP fixing rod.

FIG. 5 is a diagram showing a support clamp.

FIG. 6 is a schematic view of a state in which a screw portion of an FRP fixing rod is attached to a support clamp.

FIG. 7 is a diagram showing a conventional example in which double-armor submarine cables are connected to each other.

[Explanation of symbols]

1 cable power line 2 intervention 3 floor 4 Inner armor body 5 FRP line 6 polyethylene coating 7 floor 8 Outer armor body 9 iron wire 11 FRP fixed rod 12 screw part 13 fixing nut 14 Support clamp 15 insertion holes 18 Adhesive 19 Hollow part 20 Double-armed submarine cable 103 Inner armor body 104 Outer armor body 109 FRP line 112 iron wire 114 Intermediate connection 115 Detention tool 116 Tension member 118 wedge ring 119 Receiving ring 120 locking member 121 Locking member 131 Crimp fitting 132 screw rod 133 holes 134 fixing member 135 nuts 136 nuts

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kaoru Shimabukuro             5-2-1 Makiminato, Urasoe City, Okinawa Prefecture Okinawa Den             Power Co., Ltd. (72) Inventor Yukio Rinba             5-2-1 Makiminato, Urasoe City, Okinawa Prefecture Okinawa Den             Power Co., Ltd. (72) Inventor Hironori Tonakari             340-55 Furuhagura, Naha City, Okinawa Prefecture Stock Association             Oki Electric Works (72) Inventor Kenichi Ota             Hitachi, 1-1 Hidaka-cho, Hitachi City, Ibaraki Prefecture             Electric Wire Co., Ltd. Hidaka Factory (72) Inventor Wataru Sonobe             Hitachi, 1-1 Hidaka-cho, Hitachi City, Ibaraki Prefecture             Electric Wire Co., Ltd. Hidaka Factory (72) Inventor Eisuke Suda             Hitachi, 1-1 Hidaka-cho, Hitachi City, Ibaraki Prefecture             Electric Wire Co., Ltd. Hidaka Factory F-term (reference) 5G355 AA10 BA04 BA11                 5G375 AA14 BA26 BB83 CA02 CA12                       CD03 DB11 EA08 EA17

Claims (8)

[Claims] 1. A method for intermediate connection of a double-armor submarine cable in which an FRP wire is arranged on the inner armor body and an iron wire is arranged on the outer armor body, wherein the FRP fixing rod provided with a threaded portion at the tip thereof is Double armored submarine cable armor comprising a first step of adhering and fixing an FRP wire and a second step of fastening the threaded portion of the FRP fixing rod to a support clamp with a nut. Intermediate connection method. 2. A method for intermediate connection of a double-armor submarine cable in which an FRP wire is arranged on an inner armor body and an iron wire is arranged on an outer armor body, wherein the FRP fixing rod provided with a threaded portion at the tip thereof is provided with: A first step of adhering and fixing an FRP wire, a second step of fastening the threaded portion of the FRP fixing rod to a support clamp with a nut, and cutting the iron wire at the end without fixing it to the support clamp. And a third step of fixing the cable to the outer peripheral surface of the cable. 3. The first step includes the steps of preparing the FRP fixing rod having a hollow portion at an end into which the FRP wire is inserted, and applying an adhesive to the hollow portion. The armoring intermediate connection method for a double armored submarine cable according to any one of claims 1 and 2, which is characterized in that. 4. The first step comprises the step of inserting the FRP wire into the hollow portion of the FRP fixing rod and then covering the outer periphery of the joining portion of the fixing rod and the FRP wire with a tape winding or shrinking tube. The method for connecting the armored intermediate of a double armored submarine cable according to claim 1 or 2, characterized in that the method comprises: 5. The FR in which the first step has a hollow portion whose opening-side diameter is larger than the inner diameter of the hollow portion.
The armor intermediate connection method for a double armor submarine cable according to any one of claims 1 to 4, comprising a step of preparing a P fixing rod. 6. The first step includes the step of preparing the FRP fixing rod in which an inner peripheral surface of the hollow portion is threaded and an air vent is provided in the hollow portion. The armor intermediate connection method for a double armor submarine cable according to any one of claims 1 to 5. 7. The second step is to combine the two support clamps having insertion holes for fastening half of the FRP wires of the double-insulated submarine cable to the FRP of the double-insulated submarine cable. 3. The method for connecting an armored intermediate of a double armored submarine cable according to claim 1, further comprising the step of fastening all the wires. 8. The second step includes a step of fastening the threaded portion of the FRP fixing rod to the support clamp whose surface on which the nut contacts is angled with a nut. Item 9. A method for connecting intermediate armor of a double armor submarine cable according to any one of items 1, 2 and 7.