JP7275953B2 - DYNAMIC CABLE, DYNAMIC CABLE MANUFACTURING METHOD AND DYNAMIC CABLE LAYING METHOD - Google Patents

Description

The present disclosure relates to a dynamic cable, a method of manufacturing a dynamic cable, and a method of installing a dynamic cable.

Wind power generation equipment, substation equipment, and the like are sometimes provided in a floating state, for example. Such floating water facilities move vertically or horizontally under the influence of waves, wind, and the like. For this reason, power cables (so-called dynamic cables or riser cables) connected to floating facilities are laid in a bendable state underwater.

Specifically, the dynamic cable is laid in a state of being bent in the vertical direction in an S shape by attaching a buoy to a predetermined intermediate portion, for example. As a result, when the water facility moves, the amount of movement of the water facility can be absorbed by changing the linear shape of the S-shaped dynamic cable (for example, Patent Document 1).

JP 2006-158160 A

The inventors conducted a dynamic cable installation demonstration test, and found that aquatic organisms such as barnacles sometimes adhere to the dynamic cable, and that the attached aquatic organisms affect the linearity and flexibility of the dynamic cable. Found it. Specifically, the more aquatic organisms attach to the dynamic cable, the heavier the dynamic cable. As the dynamic cable becomes heavier, it becomes impossible to maintain the linearity of the dynamic cable within the designed range. Further, when the amount of aquatic organisms attached to the dynamic cable increases, it becomes impossible to maintain the predetermined bendability of the dynamic cable at the portion where the aquatic organisms attach. For these reasons, it is difficult to sufficiently absorb the amount of movement of the water facility when the water facility moves. As a result, excessive tension may be applied to the dynamic cable, or the bending radius of the dynamic cable may become less than the allowable bending radius.

An object of the present disclosure is to provide a technique capable of suppressing the influence on a dynamic cable due to adhesion of underwater organisms.

According to one aspect of the present disclosure,
A dynamic cable that is bendably connected to a floating facility underwater,
a cable core having a conductor and an insulating layer provided so as to surround the outer periphery of the conductor;
a protective layer that surrounds the outer periphery of the cable core and suppresses adhesion of aquatic organisms;
A dynamic cable is provided comprising:

According to another aspect of the present disclosure,
A method for manufacturing a dynamic cable that is bendably connected to a floating facility underwater,
a step of preparing a cable intermediate comprising a cable wire core having a conductor and an insulating layer provided so as to surround the outer periphery of the conductor;
a step of forming a protective layer that suppresses adhesion of aquatic organisms so as to surround the outer periphery of the cable core of the cable intermediate;
A method of manufacturing a dynamic cable is provided.

According to yet another aspect of the present disclosure,
A method for laying a dynamic cable that is bendably connected to a floating facility underwater,
a step of preparing a cable intermediate comprising a cable wire core having a conductor and an insulating layer provided so as to surround the outer periphery of the conductor;
a step of forming a protective layer that suppresses adhesion of aquatic organisms so as to surround the outer periphery of the cable core of the cable intermediate;
sending the dynamic cable with the protective layer into the water;
A dynamic cable installation method is provided.

According to the present disclosure, it is possible to suppress the influence on the dynamic cable due to the attachment of underwater organisms.

1 is a schematic diagram showing a cable laying structure according to a first embodiment of the present disclosure; FIG. 2 is a cross-sectional view orthogonal to the axial direction of the dynamic cable according to the first embodiment of the present disclosure; FIG. FIG. 4 is a cross-sectional view of a strip that constitutes a protective layer; 1 is a side view of a dynamic cable according to a first embodiment of the present disclosure; FIG. 1 is a side view of a dynamic cable according to a first embodiment of the present disclosure; FIG. 1 is a schematic diagram showing a laying ship according to a first embodiment of the present disclosure; FIG. FIG. 11 is a cross-sectional view orthogonal to the axial direction of the dynamic cable according to the third embodiment of the present disclosure; FIG. 11 is a cross-sectional view orthogonal to the axial direction of a dynamic cable according to a fourth embodiment of the present disclosure;

[Description of Embodiments of the Present Disclosure]
Embodiments of the present disclosure are listed and described.

[1] A dynamic cable according to one aspect of the present disclosure includes:
A dynamic cable that is bendably connected to a floating facility underwater,
a cable core having a conductor and an insulating layer provided so as to surround the outer periphery of the conductor;
a protective layer that surrounds the outer periphery of the cable core and suppresses adhesion of aquatic organisms;
Prepare.
According to this configuration, it is possible to suppress the influence of the attachment of aquatic organisms on the dynamic cable.

[2] In the dynamic cable described in [1] above,
The protective layer includes a strip wound around the cable core.
According to this configuration, it is possible to simplify and shorten the manufacturing process and installation process of the dynamic cable.

[3] In the dynamic cable described in [2] above,
The strip contains a repellent that repels the aquatic organisms in the base material itself.
According to this configuration, the paint layer can be omitted, and the layered structure of the strip can be simplified.

[4] In the dynamic cable described in [2] above,
At least the surface of the strip has flexibility to suppress attachment of the aquatic organisms.
According to this configuration, the surface of the strip can be made unstable, and adhesion of aquatic organisms can be suppressed.

[5] In the dynamic cable described in [2] to [4] above,
It further has a binder that binds the cable core and the belt-shaped body from the outer peripheral side of the belt-shaped body.
According to this configuration, it is possible to suppress unraveling of the belt-like body.

[6] In the dynamic cable described in [1] above,
The protective layer includes a coating film coated with a paint that suppresses adhesion of the aquatic organisms.
With this configuration, the protective layer can be made thinner.

[7] In the dynamic cable described in [1] above,
The protective layer constitutes a sheath that is extruded over the outermost layer of the dynamic cable.
With this configuration, the layered structure of the dynamic cable can be simplified.

[8] In the dynamic cable described in [1] above,
The protective layer includes a cylindrical protector fitted around the outer circumference of the cable core.
According to this configuration, the protective layer can be easily formed.

[9] A method of manufacturing a dynamic cable according to another aspect of the present disclosure includes:
A method for manufacturing a dynamic cable that is bendably connected to a floating facility underwater,
a step of preparing a cable intermediate comprising a cable wire core having a conductor and an insulating layer provided so as to surround the outer periphery of the conductor;
a step of forming a protective layer that suppresses adhesion of aquatic organisms so as to surround the outer periphery of the cable core of the cable intermediate;
have
According to this configuration, it is possible to suppress the influence of the attachment of aquatic organisms on the dynamic cable.

[10] In the dynamic cable described in [9] above,
The step of forming the protective layer is performed on a laying ship that lays the dynamic cable.
According to this configuration, it is possible to simplify and shorten the manufacturing process and installation process of the dynamic cable.

[11] A dynamic cable installation method according to still another aspect of the present disclosure includes:
A method for laying a dynamic cable that is bendably connected to a floating facility underwater,
a step of preparing a cable intermediate comprising a cable wire core having a conductor and an insulating layer provided so as to surround the outer periphery of the conductor;
a step of forming a protective layer that suppresses adhesion of aquatic organisms so as to surround the outer periphery of the cable core of the cable intermediate;
sending the dynamic cable with the protective layer into the water;
have
According to this configuration, it is possible to suppress the influence of the attachment of aquatic organisms on the dynamic cable.

[Details of the embodiment of the present disclosure]
Next, one embodiment of the present disclosure will be described below with reference to the drawings. The present disclosure is not limited to these examples, but is indicated by the scope of the claims, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.

<First embodiment of the present disclosure>
(1) Cable Laying Structure A cable laying structure according to the first embodiment of the present disclosure will be described with reference to FIG. FIG. 1 is a schematic diagram showing a cable laying structure according to a first embodiment of the present disclosure.

As shown in FIG. 1, the cable laying structure of this embodiment includes, for example, an underwater facility 1, an underwater cable (not shown), a dynamic cable 10, a plurality of buoys 12, and wires 15. there is

The floating equipment 1 is installed, for example, in a state of floating on the water due to buoyancy. The water facility 1 is, for example, a wind power generation facility. The floating type includes, for example, a semi-sub type, a spar type, and a TLP (tension leg platform) type, but there is no particular limitation on the floating type.

The water facility 1 is moored to the bottom of the water using, for example, chains or wires (not shown). The water facility 1 is moored by chains or wires and is movable within a predetermined range while floating on the water.

The submarine cable and the dynamic cable 10 are configured, for example, as power cables for transmitting power generated by the underwater facility 1 to substation facilities or the like.

The submarine cable is laid on the seabed. Since the submarine cable does not move, even if aquatic organisms, which will be described later, adhere to the submarine cable, the adhered aquatic organisms hardly affect the submarine cable.

The dynamic cable 10 , for example, connects the underwater cable and the water facility 1 , and is installed so as to rise vertically upward from the water floor toward the water facility 1 .

Also, the dynamic cable 10 is laid in a state of being bent in a vertical S-shape, for example. Thus, as described above, when the water facility 1 moves, the amount of movement of the water facility 1 can be absorbed by changing the linear shape of the dynamic cable 10 bent in the S-shape.

Specifically, a plurality of buoys 12 are attached to an intermediate portion of the dynamic cable 10 between the submarine cable and the water facility 1 . As a result, the intermediate portion of the dynamic cable 10 is held in a floating state in the water, and the dynamic cable 10 is raised from the bottom of the water by the buoyancy of the buoy 12. - 特許庁In addition, below, the part which floated in the water by attaching the buoy 12 among the dynamic cables 10 is called "float part 10a."

In the float portion 10 a of the dynamic cable 10 , for example, a plurality of buoys 12 are arranged at substantially equal intervals over a predetermined length in the axial direction of the dynamic cable 10 . Both ends of the float portion 10a of the dynamic cable 10 are moored to the bottom of the water by wires 15, respectively. As a result, the float portion 10a of the dynamic cable 10 has an arcuate shape convex vertically upward due to the balance of the buoyancy acting on each buoy 12 in the water, the gravity acting on the dynamic cable 10, and the tension acting on the wire 15. held.

On the other hand, the portion between the float portion 10a of the dynamic cable 10 and the aquatic equipment 1 hangs down due to the weight of the dynamic cable 10, forming a suspended portion 10b. The “suspension portion 10b” means a catenary-like loose portion between the float portion 10a of the dynamic cable 10 and the aquatic facility 1. As shown in FIG.

With such a configuration, the dynamic cable 10 is bent in the vertical direction in an S shape. As a result, the dynamic cable 10 behaves as follows, for example.

When the water facility 1 moves on the water surface due to the influence of waves, wind, etc., the distance from the underwater cable (the connection between the underwater cable and the dynamic cable 10) to the water facility 1 depends on the direction and amount of movement of the water facility 1. distance changes.

When the floating facility 1 moves away from the underwater cable, the dynamic cable 10 is pulled by the floating facility 1. - 特許庁When the dynamic cable 10 is pulled, the height of the float portion 10a from the bottom of the water decreases, and the height of the suspension portion 10b from the bottom of the water increases. As a result, the amount of horizontal movement of the water facility 1 away from the submarine cable can be offset by the amount of vertical descent of the float portion 10a and the amount of vertical rise of the suspension portion 10b. As a result, it is possible to allow the underwater facility 1 to move away from the underwater cable within a predetermined range, and to suppress the application of excessive tension to the dynamic cable 10 .

Conversely, the dynamic cable 10 is contracted by the floating installation 1 when the floating installation 1 approaches the underwater cable. When the dynamic cable 10 is contracted, the height of the float portion 10a from the bottom of the water increases, and the height of the suspension portion 10b from the bottom of the water decreases. As a result, the amount of horizontal movement of the water facility 1 from the submarine cable can be offset by the amount of vertical rise of the float portion 10a and the amount of vertical drop of the suspension portion 10b. As a result, the underwater facility 1 can be allowed to approach the underwater cable within a predetermined range, and excessive bending of the dynamic cable 10 can be suppressed.

The linearity of the dynamic cable 10 exhibiting the above-described behavior is designed so that, for example, even when the underwater facility 1 is farthest from the underwater cable, a tension exceeding the allowable tension is not applied to the dynamic cable 10. . Further, the linear shape of the dynamic cable 10 is designed, for example, so that the bending radius of the dynamic cable 10 does not become less than the allowable bending radius of the dynamic cable 10 even when the underwater facility 1 is closest to the underwater cable side. there is Specifically, for example, the buoyancy of the buoys 12 attached to the float portion 10a, the number of buoys 12, the attachment position of the buoys 12 (the position of the float portion 10a), the interval between the buoys 12, and the wire are satisfied so as to satisfy the above design conditions. 15 length, etc. are set.

However, if aquatic organisms such as barnacles adhere to the dynamic cable 10 , the attached aquatic organisms may affect the linearity and bendability of the dynamic cable 10 .

Therefore, the dynamic cable 10 of the present embodiment is configured, for example, to suppress adhesion of aquatic organisms as follows.

(2) Dynamic Cable Next, the configuration of the dynamic cable 10 of this embodiment will be described with reference to FIGS. 2 to 4B. FIG. 2 is a cross-sectional view orthogonal to the axial direction of the dynamic cable according to this embodiment. Note that hatching of portions other than the protective layer 170 is omitted. FIG. 3 is a cross-sectional view of a strip that constitutes the protective layer. FIG. 4A is a side view of the dynamic cable according to this embodiment. FIG. 4B is a side view of the dynamic cable according to this embodiment. Note that the dotted line in FIG. 4B indicates the belt-like body 200 when longitudinally wound.

As shown in FIG. 2, the dynamic cable 10 of this embodiment includes, for example, a cable core 110, an intermediate 120, a holding tape 130, a floor tape 140, and an iron wire sheath from the center toward the outer periphery. (Armor) 150 , an anticorrosion layer (covering layer) 160 , and a protection layer 170 .

The cable core 110 is configured, for example, as a CV cable (cross-linked polyethylene insulated vinyl sheath cable, also referred to as XLPE cable), and includes, for example, a conductor (not shown) and an internal semiconductive layer ( not shown), an insulating layer (not shown), an outer semi-conductive layer (not shown), a semi-conductive tape (not shown), a copper wire (not shown), and a holding tape (not shown). shown) and a sheath (not shown). In this embodiment, for example, the dynamic cable 10 is for alternating current, and three cable cores 110 are twisted together.

Interposer 120 is provided to fill the space within the circumscribing envelope of the three cable cores 110 . Interposer 120 is composed of, for example, polypropylene yarn.

The iron wire sheath 150 has a plurality of iron wires (not shown) surrounding the outer circumference of the cable core 110 . For example, a plurality of iron wires are spirally wound around the outer circumference of the floor tape 140 . Moreover, the iron wire is composed of, for example, a galvanized steel wire. Note that the outer circumference of the iron wire may be coated with tar for rust prevention.

The iron wire sheathing 150 has, for example, a two-layer structure, and includes a first iron wire sheathing 152 and a second iron wire sheathing 154 .

The anticorrosion layer 160 is provided so as to surround the outer circumference of the iron wire sheathing 150 . The anticorrosion layer 160 has, for example, polypropylene yarn (not shown). The anticorrosion layer 160 may have a sheath (not shown) that is extrusion-coated so as to cover the outer circumference of the polypropylene yarn. The sheath that constitutes the anticorrosion layer 160 preferably contains polyethylene, for example.

Protective layer 170 is provided so as to surround the outer circumference of anticorrosive layer 160 (that is, the outer circumference of cable core 110). Protective layer 170 is configured, for example, to inhibit attachment of aquatic organisms.

The term "aquatic organisms" as used herein means organisms that have the property of adhering to underwater structures and inhabiting them. Underwater organisms in the ocean are also called "marine growth". Specifically, aquatic organisms include, for example, animals such as oysters, mussels and barnacles, plants such as laver, and various aquatic organisms such as bacteria.

As shown in FIG. 3 , the protective layer 170 of this embodiment includes, for example, a belt-like body 200 wrapped around the outer periphery of the anticorrosion layer 160 . At least the surface side of the belt-shaped body 200 that constitutes the protective layer 170 has the property of suppressing adhesion of aquatic organisms. In addition, the band-shaped body 200 has flexibility and stretchability that can follow the bending of the cable core 110 .

Specifically, the belt-shaped body 200 of this embodiment is made of, for example, a tape. That is, the belt-shaped body 200 has, for example, a base material 210, a paint layer 220, and an adhesive layer 230. As shown in FIG.

The base material 210 holds the paint layer 220 and the adhesive layer 230, for example, and contains a polymer having predetermined flexibility and stretchability. Specifically, the polymer constituting the base material 210 includes, for example, polyethylene, polypropylene, ethylene-α olefin copolymer, ethylene-vinyl acetate copolymer, polyethylene terephthalate, polycarbonate, polymethyl methacrylate, and polyvinyl chloride. , polyimide, and rubber (natural rubber or synthetic rubber). Two or more of these may be used. Also, other materials may be mixed with these as a base.

The paint layer 220 is provided, for example, on the surface side of the substrate 210 . The paint layer 220 contains, for example, paint that suppresses adhesion of aquatic organisms.

The paint that forms the paint layer 220 contains, for example, a base resin and an antifouling agent.

The base resin is configured to be hydrolyzed in water, for example. As the base resin is hydrolyzed, the antifouling agent contained in the paint is eluted into water, and a new surface of the base resin appears. By repeating this process in sequence, it is possible to suppress adhesion of aquatic organisms over the long term. Paints using such base resins are called "self-polishing".

Alternatively, the base resin may be configured to dissolve in water, for example. By dissolving the base resin, an effect similar to that of the self-polishing type can be obtained. Paints using such base resins are called "degradable".

Either one of the self-polishing base resin and the collapsible base resin may be used, or both of them may be used. Moreover, not only at least one of the self-polishing base resin and the disintegrating base resin, but also a non-hydrolyzable and water-insoluble base resin may be included.

Specifically, examples of the base resin include (meth)acrylic acid metal salt copolymers, polyester metal salt copolymers, silyl ester-containing copolymers, polysiloxane block-containing metal salt copolymers, sulfur-containing organo Polysiloxane block vinyl copolymer, rosin ester resin, rosin soap, rosin, vinyl chloride resin, vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinyl isobutyl ether copolymer, chlorinated rubber resin, acrylic resin (excluding (meth)acrylate metal salt copolymers, silyl ester-containing copolymers, polysiloxane block-containing metal salt copolymers, and sulfur-containing organopolysiloxane block vinyl copolymers), styrene-butadiene resins, At least one of polyester resins (excluding polyester metal salt copolymers), epoxy resins, phenolic resins, synthetic rubbers, and petroleum resins can be used. Two or more of these may be used. The term "(meth)acryl" used herein is a generic term for acryl and methacryl.

An antifouling agent is a material having an antifouling property that suppresses adhesion of aquatic organisms. Specifically, the antifouling agent is not particularly limited. Dichloro-2-n-octyl-4-isothiazolin-3-one (abbreviation: DCOIT), 4-bromo-2-(4-chlorophenyl)-5-(trifluoromethyl)-1H-pyrrole-3-carbonitrile ( Abbreviations: tralopyril), borane-nitrogen base adducts (pyridinetriphenylborane, 4-isopropylpyridinediphenylmethylborane, etc.), (+/-)-4-[1-(2,3-dimethylphenyl)ethyl]- 1H-imidazole (abbreviation: medetomidine), N-(2,4,6-trichlorophenyl)maleimide, 2,4,5,6-tetrachloroisophthalonitrile, chloromethyl-n-octyldisulfide, 2,3-dichloro -N-(2',6'-diethylphenyl)maleimide and at least one of 2,3-dichloro-N-(2'-ethyl-6'-methylphenyl)maleimide. Two or more of these may be used.

The adhesive layer 230 is provided on the back surface side of the base material 210, for example. The material forming the adhesive layer 230 is not particularly limited, but includes, for example, at least one of an acrylic adhesive, a urethane adhesive, a silicone adhesive, and a rubber adhesive. Two or more of these may be used. By providing the adhesive layer 230 , the strip 200 can be easily attached to the outer circumference of the anticorrosion layer 160 .

The manner in which the belt-shaped body 200 is wound around the outer circumference of the anticorrosive layer 160 is not particularly limited, but for example, the following two manners can be employed.

As shown in FIG. 4A, the strip 200 is, for example, spirally wound around the outer circumference of the anticorrosion layer 160 . Thereby, the belt-shaped body 200 can be firmly wound around the anticorrosion layer 160 .

Alternatively, as shown in FIG. 4B , the strip 200 may be wound longitudinally around the outer circumference of the anticorrosion layer 160 , for example. As used herein, “longitudinal attachment” refers to winding the belt-like body 200 so that the longitudinal direction of the belt-like body 200 substantially coincides with the axial direction of the dynamic cable 10 . As a result, twisting of the dynamic cable 10 when the band-shaped body 200 is wound can be suppressed.

Further, the dynamic cable 10 may have a binder 300, for example, as shown in FIGS. 4A and 4B. The binder 300 , for example, binds the cable core 110 and the belt-shaped body 200 from the outer peripheral side of the belt-shaped body 200 . This can prevent the band-shaped body 200 from unraveling.

The binder 300 is, for example, a so-called binding band for binding objects. Thereby, the binder 300 can be easily bound to the outer peripheral side of the band-shaped body 200 . Note that the binder 300 may be, for example, a wire or the like. Alternatively, the binder 300 may be a rope such as Vectran, for example.

A plurality of binders 300 are arranged at predetermined intervals in the axial direction of the dynamic cable 10, for example. The interval between the binders 300 is, for example, 1 m or more and 20 m or less. As a result, unraveling of the band-shaped body 200 can be evenly suppressed in the axial direction of the dynamic cable 10 . Moreover, the desired bendability of the dynamic cable 10 can be maintained by arranging the binders 300 at intervals in the axial direction of the dynamic cable 10 .

Note that the interval between the binders 300 may be varied according to the position of the dynamic cable 10 . For example, the interval between the binders 300 in each of the float portion 10a and the suspension portion 10b of the dynamic cable 10 may be shorter than the interval between the binders 300 in other portions. This makes it difficult for the belt-like body 200 to unravel even in the float portion 10a and the suspension portion 10b, which move greatly when the water facility 1 moves.

(3) Dynamic Cable Manufacturing Method and Dynamic Cable Laying Method Next, a dynamic cable manufacturing method and a dynamic cable laying method according to the present embodiment will be described with reference to FIG. FIG. 5 is a schematic diagram showing a laying ship according to this embodiment. It should be noted that the process of laying the dynamic cable 10 of the present embodiment includes, for example, the process of manufacturing the dynamic cable 10 .

(Step 1: Cable intermediate preparation step)
First, the cable intermediate 5 is prepared. The "cable intermediate 5" here means an intermediate (intermediate member) of the dynamic cable 10 produced during the dynamic cable manufacturing process. That is, the cable intermediate 5 includes, for example, a cable core 110, an interposition 120, a pressing tape 130, a floor tape 140, an iron wire sheath 150, an anticorrosive layer 160, and It has

In this embodiment, for example, the cable intermediate 5 is produced using a predetermined manufacturing apparatus in a manufacturing plant on land. After the cable intermediate body 5 is produced, the cable intermediate body 5 is wound around a predetermined cable coil, and the cable coil is mounted on a laying ship 2 which will be described later.

After being mounted on the laying ship, the submarine cable and the cable intermediate 5 are connected on the laying ship 2 using a predetermined dedicated kit.

(Step 2: Protective layer forming step)
Next, using the laying ship 2 of the present embodiment, the processes after step 2 below are performed.

As shown in FIG. 5, the laying ship 2 of this embodiment includes, for example, a cable storage area 21, a tower 22, a cable guide (not shown), a protective layer forming device 23, a binder binding device 24, and a shooter. 25 and .

The cable storage area 21 is provided, for example, on the laying ship 2 and has a cable coil for winding and storing the cable intermediate 5 described above.

The scaffold 22 is provided vertically above the cable storage area 21 and configured to lift and support the cable intermediate 5 supplied from the cable storage area 21 vertically above the cable storage area 21 .

The cable guide is configured, for example, to guide the cable intermediate 5 from the tower 22 toward the stern side of the laying ship 2 .

The protection layer forming device 23 is configured to form the protection layer 170 so as to surround the outer circumference of the cable core 110 of the cable intermediate 5, for example. Specifically, the protective layer forming device 23 has, for example, a bobbin (not shown) and a cage (not shown). The bobbin holds, for example, the strip 200 wound thereon. The cage holds, for example, a bobbin and is configured to be rotatable around the cable intermediate 5 in the circumferential direction.

The binder binding device 24 is configured to bind the binder 300, for example.

The shooter 25 is provided, for example, at the stern of the cable laying ship 2 and configured to send out the dynamic cable 10 underwater.

In step 2, first, the cable intermediate 5 is conveyed from the cable storage area 21 toward the stern side of the laying ship 2 via the scaffold 22 and the cable guide.

When the intermediate cable 5 is transported and reaches the protective layer forming device 23, the protective layer forming device 23 is used to rotate the cage around the cable intermediate 5 in the circumferential direction, and the strip 200 is sent out from the bobbin. After the strip 200 is fed out, the strip 200 is spirally wound around the outer circumference of the cable wire core 110 of the cable intermediate 5 . Thereby, a protective layer 170 is formed on the outer circumference of the cable intermediate 5 .

(Step 3: Binder binding process)
After the protective layer 170 is formed, the cable intermediate 5 with the protective layer 170 formed thereon is transported toward the stern side of the laying ship 2 while using the binder binding device 24 to bind the cable intermediate 5 from the outer peripheral side of the strip 200. The binder 300 is bound so as to bind the . At this time, the binders 300 are sequentially arranged at predetermined intervals in the axial direction of the cable intermediate 5 .

As described above, the dynamic cable 10 of the present embodiment is manufactured.

(Step 4: Cable delivery process)
After manufacturing the dynamic cable 10, the chute 25 is used to send the dynamic cable 10 and the submarine cable into the water.

As described above, the dynamic cable 10 and the underwater cable of the present embodiment are laid underwater. After laying the dynamic cable 10 having a predetermined length underwater, a diver dives into the water and connects the dynamic cable 10 and the water facility 1 . The diver also attaches a plurality of buoys 12 and wires 15 to the dynamic cable 10 to form the float portion 10a.

(4) Effects According to the Present Embodiment According to the present embodiment, one or more of the following effects can be obtained.

(a) The dynamic cable 10 of the present embodiment is provided with a protection layer 170 so as to surround the outer circumference of the cable core 110 . As a result, adhesion of aquatic organisms to the dynamic cable 10 can be suppressed. By suppressing adhesion of aquatic organisms to the dynamic cable 10, it is possible to suppress an increase in the weight of the dynamic cable 10 due to the adhesion of aquatic organisms. By suppressing the weight increase of the dynamic cable 10, the linearity of the dynamic cable can be maintained within the designed range. In addition, by suppressing the adhesion of aquatic organisms to the dynamic cable 10, the surface of the dynamic cable 10 can be maintained in a smooth state, and the predetermined bendability of the dynamic cable can be maintained. By these, when the water equipment 1 moves, the amount of movement of the water equipment 1 can be fully absorbed. As a result, application of excessive tension to the dynamic cable 10 can be suppressed, and bending radius of the dynamic cable 10 can be suppressed from being less than the allowable bending radius. As described above, in this embodiment, it is possible to suppress the influence on the dynamic cable 10 due to the attachment of underwater organisms.

(b) the protective layer 170 includes strips 200; By using the band-shaped body 200, the protective layer 170 can be easily formed by winding the band-shaped body 200 so as to surround the outer circumference of the cable core 110. FIG. Moreover, compared with an extruder that extrudes the protective layer 17 using a predetermined resin composition, a simple protective layer forming apparatus 23 as described above can be used. As a result, for example, the protective layer forming process can be performed on the laying ship 2, and the dynamic cable 10 can be sent out into the water immediately after the protective layer forming process. That is, the manufacturing process and installation process of the dynamic cable 10 can be simplified and shortened.

(c) The binder 300 binds the cable core 110, the belt-shaped body 200, and the like from the outer peripheral side of the belt-shaped body 200. FIG. This can prevent the band-shaped body 200 from unraveling.

Here, when the water facility 1 moves, the dynamic cable 10 absorbs the amount of movement of the water facility 1 by changing the linear shape as described above. At this time, the belt-like body 200 is contracted on the inner side of the bending of the dynamic cable 10 , and the belt-like body 200 is extended on the outer side of the bending of the dynamic cable 10 . If such a state is repeated, the band-shaped body 200 may gradually peel off from the anticorrosion layer 160, and the band-shaped body 200 may unravel. If the belt-shaped body 200 melts and a part of the anticorrosion layer 160 is exposed, there is a possibility that the effect of suppressing adhesion of aquatic organisms described above cannot be obtained.

On the other hand, by binding the strip 200 with the binder 300, even if the linearity of the dynamic cable 10 changes, the strip 200 is suppressed from being peeled off from the anticorrosion layer 160, and the unraveling of the strip 200 is suppressed. be able to. This makes it possible to stably maintain the effect of suppressing adhesion of aquatic organisms.

(5) Modifications of the present embodiment The first embodiment described above can be modified as in the following modifications, if necessary. Hereinafter, only elements different from the above-described embodiment will be described, and elements that are substantially the same as those described in the above-described embodiment will be given the same reference numerals, and descriptions thereof will be omitted.

(Modification 1)
In the first embodiment described above, the strip 200 has the adhesive layer 230 , but the strip 200 may have a heat-sealable layer instead of the adhesive layer 230 . By heating the belt-shaped body 200 after winding it, the belt-shaped body 200 can be brought into close contact with the cable intermediate body 5 so as to follow the outer shape of the cable intermediate body 5 .

(Modification 2)
In the first embodiment described above, the belt-shaped body 200 has the adhesive layer 230, but the belt-shaped body 200 may be configured as a film (sheet) having no adhesive layer. In this case, it is preferable to provide a binder 300 for bundling the band 200 . Since the strip 200 does not have the adhesive layer 230, the layer structure of the strip 200 can be simplified.

(Modification 3)
In Modification 1 described above, the strip 200 has a heat-sealable layer instead of the adhesive layer 230. However, as in Modification 2, the strip 200 is configured as a film, and the substrate 210 itself is heat-sealable. may have gender. This makes it possible to simplify the layered structure of the belt-shaped body 200 and obtain a predetermined adhesion force by thermal fusion bonding.

(Modification 4)
In the above-described first embodiment, the band 200 has the coating layer 220, but the base 210 itself may contain a repellent that repels aquatic organisms. A repellent is, for example, a material that has the property of inhibiting neurotransmission of aquatic organisms. Specifically, the repellent includes, for example, the above-mentioned medetomidine. Since the base material 210 itself of the strip 200 contains a repellent, the paint layer 220 can be omitted, and the layer structure of the strip 200 can be simplified.

(Modification 5)
In the first embodiment described above, the strip 200 has the paint layer 220 containing the antifouling agent. You may have Specifically, the strip 200 may not have the paint layer 220, and the base material 210 itself may have a predetermined flexibility. Examples of the material of the base material 210 having predetermined flexibility include silicone rubber. As a result, the surface of the belt-shaped body 200 is made unstable, and adhesion of aquatic organisms can be suppressed. Also, even if aquatic organisms adhere to the belt-shaped body 200 , the linear change of the dynamic cable 10 allows the aquatic organisms to be easily removed from the belt-shaped body 200 . Moreover, since the strip 200 does not have the paint layer 220, the layer structure of the strip 200 can be simplified.

<Second embodiment of the present disclosure>
Next, a second embodiment of the present disclosure will be described using FIG.

This embodiment differs from the first embodiment in that the band-shaped body 200 is not used as the protection layer 170 . Only elements different from the first embodiment will be described below, as in the modification of the first embodiment.

The protective layer 170 of this embodiment includes, for example, a coating film coated with a paint that suppresses adhesion of aquatic organisms. As the paint, for example, the same material as the material forming the paint layer 220 of the belt-shaped body 200 in the above-described first embodiment can be used. Note that the binder 300 is not required in this embodiment.

In the manufacturing process of the dynamic cable 10 of the present embodiment, for example, a cable intermediate preparation process and a protective layer forming process are performed in a manufacturing plant on land. In the protective layer forming step, for example, a spray method, a dip method, or the like is adopted to apply a coating film to the outside of the anticorrosive layer 160 . After applying the coating, the coating is dried. Thereby, the dynamic cable 10 of this embodiment is manufactured. In addition, when the coating film dries quickly, the protective layer forming process may be performed on the laying ship 2 .

According to this embodiment, since the protective layer 170 includes a coating film, the protective layer 170 can be made thinner than when the band-shaped body 200 is used. As a result, the weight of the dynamic cable 10 can be reduced, and the flexibility of the dynamic cable 10 can be improved.

Moreover, according to the present embodiment, since the protective layer 170 includes a coating film, it is possible to improve the conformability of the anticorrosion layer 160 to the outer shape.

<Third embodiment of the present disclosure>
Next, a third embodiment of the present disclosure will be described using FIG. FIG. 6 is a cross-sectional view orthogonal to the axial direction of the dynamic cable according to this embodiment.

In this embodiment, the anticorrosion layer 160 and the protective layer 170 are different from those in the first embodiment. Only elements different from the first embodiment will be described below, as in the modification of the first embodiment.

As shown in FIG. 6, the protective layer 170 of the present embodiment constitutes a sheath that is extrusion coated on the outermost layer of the anti-corrosion layer 160 of the dynamic cable, for example. As a material for forming the protective layer 170, for example, the same material as the material for forming the paint layer 220 of the band-shaped body 200 in the above-described first embodiment can be used.

In the manufacturing process of the dynamic cable 10 of the present embodiment, for example, a cable intermediate preparation process and a protective layer forming process are performed in a manufacturing plant on land. In the protective layer forming step, for example, a predetermined extruder is used to extrusion coat the protective layer 170 so as to cover the outer circumference of the polypropylene yarn of the anticorrosion layer 160 . Thereby, the dynamic cable 10 of this embodiment is manufactured.

According to this embodiment, the protective layer 170 constitutes a sheath (also serves as a sheath), so that the layer structure of the dynamic cable 10 can be simplified. As a result, the weight of the dynamic cable 10 can be reduced, and the flexibility of the dynamic cable 10 can be improved.

In addition, according to the present embodiment, by extruding the protective layer 170 to cover, it is possible to improve the conformability to the layers inside the protective layer 170 .

<Fourth embodiment of the present disclosure>
Next, a fourth embodiment of the present disclosure will be described using FIG. FIG. 7 is a cross-sectional view perpendicular to the axial direction of the dynamic cable according to this embodiment.

This embodiment differs from the first embodiment in that the band-shaped body 200 is not used as the protection layer 170 . Only elements different from the first embodiment will be described below, as in the modification of the first embodiment.

As shown in FIG. 7, the protective layer 170 of this embodiment includes, for example, a cylindrical protector 400. As shown in FIG. Protector 400 , for example, is fitted to anticorrosion layer 160 so as to surround the outer circumference of cable core 110 .

Specifically, the protector 400 has, for example, a pair of semi-cylindrical portions 420 , a connecting portion 440 and a fitting portion 460 . Each of the pair of semi-cylindrical portions 420 is configured, for example, in a semi-cylindrical shape that is split in half along a longitudinal half-splitting surface. The connecting portion 440 connects, for example, one end of each of the pair of half-cylindrical portions 420 in the circumferential direction. The pair of semi-cylindrical portions 420 are connected via a connecting portion 440 so as to be openable. The fitting portion 460 is provided, for example, on the other end side of each of the pair of semi-cylindrical portions 420 in the circumferential direction, and is fitted to the other end side of the mating half-cylindrical portion 420 .

At least the surface side of the protector 400 has the property of suppressing adhesion of aquatic organisms, for example. In addition, the protector 400 has, for example, predetermined bendability and stretchability. Specifically, the protector 400 has, for example, a base material (not shown) and a paint layer (not shown). As materials constituting the base material and the paint layer of the protector 400, for example, the same materials as those constituting the base material 210 and the paint layer 220 of the belt-shaped body 200 in the above-described first embodiment can be used. can. In the protector 400, Modifications 4 and 5 of the above-described first embodiment may be applied.

A plurality of protectors 400 are arranged continuously in the axial direction of the dynamic cable 10, for example. In addition, the protectors 400 adjacent to each other in the axial direction of the dynamic cable 10 may be connected.

Moreover, the protector 400 is configured to be detachable, for example. Specifically, each of the pair of semi-cylindrical portions 420 has a knob portion 422 on one end side (fitting portion 460 side). The protector 400 can be removed from the anticorrosion layer 160 by pulling the tab portion 422 .

The process of laying the dynamic cable 10 of this embodiment includes, for example, the process of manufacturing the dynamic cable 10 . In this embodiment, after the cable intermediate preparation process, for example, the protective layer forming process is performed on the laying ship 2 . In the protective layer forming step, for example, a predetermined protector fitting device is used to fit the protector 400 to the cable intermediate 5 . Thereby, the dynamic cable 10 of this embodiment is manufactured. After manufacturing the dynamic cable 10, a cable delivery process is performed. As described above, the dynamic cable 10 of the present embodiment is laid underwater.

According to this embodiment, by using the protector 400, the protector 400 can be fitted so as to surround the outer periphery of the cable core 110, and the protection layer 170 can be easily formed.

Further, according to the present embodiment, the protector 400 is detachable. Therefore, if aquatic organisms adhere to the surface of the protector 400, the protector 400 to which the aquatic organisms adhere is removed, and a new protector is installed. 400 can be exchanged.

<Other embodiments of the present disclosure>
Although the embodiments of the present disclosure have been specifically described above, the present disclosure is not limited to the above-described embodiments, and can be variously modified without departing from the scope of the present disclosure. It should be noted that the "above-described embodiment" here means the first to third embodiments.

In the above-described embodiment, the dynamic cable 10 has two layers of the iron wire sheath 150, but the iron wire sheath 150 may be provided with only one layer, or may be provided with three or more layers. good too.

Although the dynamic cable 10 has three cable cores 110 in the above embodiment, the dynamic cable 10 may at least partially include a communication cable such as an optical fiber.

In the above-described embodiment, the dynamic cable 10 has one set of the float portion 10a and the suspension portion 10b. good too. In this case, it is preferable that only the float part 10a farthest from the water facility 1 is moored to the bottom of the water. That is, the float part 10a that is not moored to the water bottom may be provided between the water facility 1 and the float part 10a that is moored to the water bottom.

In the above embodiment, a case where a plurality of buoys 12 are attached to the dynamic cable 10 has been described, but one buoy 12 may be attached to each float portion 10a of the dynamic cable 10. FIG.

Further, in the above-described embodiment, the case where the water facility 1 is a wind power generation facility has been described as an example, but the water facility 1 is not limited to a power generation facility such as a wind power generation facility, and may be, for example, a substation facility. Also, the water facility 1 may be installed on the ocean, on a river, or on a lake.

In the above-described embodiment, the dynamic cable 10 is provided with the protection layer 170 , but the buoy 12 may also be provided with a protection layer similar to the protection layer 170 of the dynamic cable 10 .

In the above-described embodiment, the protective layer 170 has only one layer, but the protective layer 170 may have multiple layers. As a result, if aquatic organisms adhere to the surface of the outermost protective layer 170, the protective layer 170 to which the aquatic organisms adhere can be peeled off (removed) to expose a clean protective layer 170.

In the above-described embodiment, in the cable intermediate preparation process, the case where the submarine cable and the cable intermediate 5 are connected on the laying ship has been described, but the present invention is not limited to this case. For example, after connecting the submarine cable and the cable intermediate body 5 on land, they may be mounted on the laying ship 2 . Alternatively, the underwater cable and the dynamic cable 10 may be once laid (sinking) on the ocean floor and then connected.

In the above-described embodiment, the case where the laying ship 2 has the cable storage area 21 and the scaffold 22 has been described. You may have a container called . In this case, the tower 11 is omitted.

In the above-described embodiment, the protective layer 170 is formed by the protective layer forming apparatus 23. However, the protective layer 170 may be formed by manually winding the strip-shaped protective layer 170. FIG.

In the above-described embodiment, the case where the protective layer forming step (step 2) is performed on the laying ship 2 has been described, but the present disclosure is not limited to this case. The protective layer forming step (step 2) may be performed, for example, in a factory on land.

In the fourth embodiment described above, the protector 400 has a pair of semi-cylindrical portions 420, but the protector 400 is not limited to this configuration. Protector 400 may be configured, for example, as a binder bound so as to surround the outer circumference of cable core 110 .

<Preferred Embodiment of the Present Disclosure>
Preferred embodiments of the present disclosure will be added below.

(Appendix 1)
A dynamic cable that is bendably connected to a floating facility underwater,
a cable core having a conductor and an insulating layer provided so as to surround the outer periphery of the conductor;
a protective layer that surrounds the outer periphery of the cable core and suppresses adhesion of aquatic organisms;
dynamic cable.

(Appendix 2)
2. The dynamic cable of claim 1, wherein the protective layer includes a strip wrapped around the cable core.

(Appendix 3)
The band-shaped body
a strip-shaped base material;
A paint layer provided on the surface side of the base material and containing a paint that suppresses adhesion of the aquatic organisms;
The dynamic cable of clause 2, comprising:

(Appendix 4)
3. The dynamic cable according to appendix 3, wherein the strip has an adhesive layer provided on the back side of the base material.

(Appendix 5)
3. The dynamic cable according to appendix 3, wherein the belt-shaped body has a heat-sealable layer provided on the back side of the base material.

(Appendix 6)
3. The dynamic cable according to appendix 3, wherein the base material has heat-sealability.

(Appendix 7)
3. The dynamic cable according to appendix 2, wherein the base material itself contains a repellent that repels the aquatic organisms.

(Appendix 8)
2. The dynamic cable according to appendix 2, wherein at least the surface of the belt-like body has flexibility to suppress attachment of the aquatic organisms.

(Appendix 9)
9. The dynamic cable according to appendix 8, wherein the strip comprises silicone rubber.

(Appendix 10)
10. The dynamic cable according to any one of appendices 2 to 9, further comprising a binder that binds the cable core and the belt-shaped body from the outer peripheral side of the belt-shaped body.

(Appendix 11)
11. The dynamic cable according to appendix 10, wherein a plurality of the binders are arranged at predetermined intervals in the axial direction of the dynamic cable.

(Appendix 12)
A float part that floats in the water by attaching a buoy,
a catenary-shaped suspended portion between the float portion and the aquatic equipment;
has
12. A dynamic cable according to claim 11, wherein the spacing of the binder in each of the float portion and the suspension portion is shorter than the spacing of the binder in other portions.

(Appendix 13)
The dynamic cable according to appendix 1, wherein the protective layer includes a coating film coated with a paint that suppresses adhesion of the aquatic organisms.

(Appendix 14)
2. The dynamic cable of claim 1, wherein the protective layer comprises a sheath that is extruded over the outermost layer of the dynamic cable.

(Appendix 15)
2. The dynamic cable according to claim 1, wherein the protective layer includes a cylindrical protector fitted around the outer circumference of the cable core.

(Appendix 16)
16. The dynamic cable according to appendix 15, wherein the protector is detachable.

(Appendix 17)
A cable laying structure having a dynamic cable bendably connected to a floating facility underwater,
The dynamic cable is
a cable core having a conductor and an insulating layer provided so as to surround the outer periphery of the conductor;
a protective layer that surrounds the outer periphery of the cable core and suppresses adhesion of aquatic organisms;
cable laying structure.

(Appendix 18)
A method for manufacturing a dynamic cable that is bendably connected to a floating facility underwater,
a step of preparing a cable intermediate comprising a cable wire core having a conductor and an insulating layer provided so as to surround the outer periphery of the conductor;
a step of forming a protective layer that suppresses adhesion of aquatic organisms so as to surround the outer periphery of the cable core of the cable intermediate;
A method of manufacturing a dynamic cable having

(Appendix 19)
19. The method of manufacturing a dynamic cable according to appendix 18, wherein the step of forming the protective layer is performed on a laying ship for laying the dynamic cable.

(Appendix 20)
A method for laying a dynamic cable that is bendably connected to a floating facility underwater,
a step of preparing a cable intermediate comprising a cable wire core having a conductor and an insulating layer provided so as to surround the outer periphery of the conductor;
a step of forming a protective layer that suppresses adhesion of aquatic organisms so as to surround the outer periphery of the cable core of the cable intermediate;
sending the dynamic cable with the protective layer into the water;
A dynamic cable installation method having

(Appendix 21)
21. The dynamic cable laying method according to appendix 20, wherein the step of forming the protection layer is performed on a laying ship for laying the dynamic cable.

(Appendix 22)
A dynamic cable laying ship for laying a dynamic cable that is bendably connected to floating equipment underwater,
a cable storage area for storing a cable intermediate having a cable core having a conductor and an insulating layer surrounding the outer periphery of the conductor;
a protective layer forming device that forms a protective layer that suppresses adhesion of aquatic organisms so as to surround the outer periphery of the cable core of the cable intermediate;
a shooter for sending out the dynamic cable formed with the protective layer underwater;
A dynamic cable laying ship with

1 Water Facility 2 Laying Ship 5 Cable Intermediate 10 Dynamic Cable 10a Float 10b Suspension 12 Buoy 15 Wire 17 Protective Layer 21 Cable Storage Area 23 Protective Layer Forming Device 24 Binder Binding Device 25 Chuter 110 Cable Core 120 Interposition 130 Holding Tape 140 seat floor tape 150 iron wire sheathing 152 first iron wire sheathing 154 second iron wire sheathing 160 anticorrosive layer 170 protective layer 200 belt-like body 210 base material 220 paint layer 230 adhesive layer 300 binder 400 protector 420 semi-cylindrical portion 422 knob portion 440 connecting portion 460 Fitting portion

Claims (14)

A dynamic cable that is bendably connected to a floating facility underwater,
a cable core having a conductor and an insulating layer provided so as to surround the outer periphery of the conductor;
a protective layer provided to surround the outer periphery of the cable core;
with
the protective layer is configured to attract less aquatic organisms than a dynamic cable without the protective layer; and
The protective layer includes a belt-shaped body wound around the outer circumference of the cable core,
A plurality of binders for binding the cable core and the belt-shaped body from the outer peripheral side of the belt-shaped body are arranged at predetermined intervals in the axial direction of the dynamic cable ,
The plurality of binders are configured to suppress stripping of the strip from the cable core and unraveling of the strip with respect to linear changes of the dynamic cable more than a dynamic cable without the binder. there is
dynamic cable. A dynamic cable that is bendably connected to a floating facility underwater,
a cable core having a conductor and an insulating layer provided so as to surround the outer periphery of the conductor;
a protective layer provided to surround the outer periphery of the cable core;
with
The protective layer is configured to attract less aquatic organisms than a dynamic cable without the protective layer, and
The protective layer includes a belt-shaped body wound around the outer circumference of the cable core,
A plurality of binders for binding the cable core and the belt-shaped body from the outer peripheral side of the belt-shaped body are arranged at predetermined intervals in the axial direction of the dynamic cable,
The dynamic cable is
A float portion that is held in an arc shape that is convex vertically upward while floating in the water by having a plurality of buoys attached thereto;
a catenary-shaped suspended portion between the float portion and the aquatic facility;
has
An interval between the plurality of binders in each of the float portion and the suspension portion is shorter than an interval between the plurality of binders in a portion of the dynamic cable other than the float portion and the suspension portion.
dynamic cable. 3. The dynamic cable according to claim 1, wherein the base material of the band-shaped body itself contains a repellent agent for repelling the aquatic organisms. 3. The dynamic cable according to claim 1 or 2, wherein at least the surface of said belt-shaped body has flexibility to suppress attachment of said underwater organisms. The dynamic cable according to any one of claims 1 to 4, wherein a plurality of protective layers are laminated in a radial direction of the dynamic cable. A dynamic cable that is bendably connected to a floating facility underwater,
a cable core having a conductor and an insulating layer provided so as to surround the outer periphery of the conductor;
a protective layer provided to surround the outer periphery of the cable core;
with
the protective layer is configured to attract less aquatic organisms than a dynamic cable without the protective layer; and
The protective layer is laminated in a radial direction of the dynamic cable ,
An outer protective layer among the plurality of protective layers is configured to be peelable from an inner protective layer.
dynamic cable. 7. The dynamic cable according to claim 6, wherein the protective layer includes a strip wrapped around the outer periphery of the cable core. 7. The dynamic cable according to claim 6, wherein the protective layer includes a coating film coated with a paint that suppresses adhesion of the aquatic organisms. 7. The dynamic cable according to claim 6, wherein the protective layer constitutes a sheath that is extruded over the outermost layer of the dynamic cable. A method for manufacturing a dynamic cable that is bendably connected to a floating facility underwater,
a step of preparing a cable intermediate comprising a cable wire core having a conductor and an insulating layer provided so as to surround the outer periphery of the conductor;
forming a protective layer so as to surround the outer circumference of the cable core of the cable intermediate;
has
In the step of forming the protective layer,
The protective layer is configured to attract less aquatic organisms than a dynamic cable without the protective layer, and
Forming a layer containing a belt-shaped body wound around the outer circumference of the cable core as the protection layer,
After forming the protective layer,
A plurality of binders for binding the cable core and the belt-shaped body from the outer peripheral side of the belt-shaped body are arranged at predetermined intervals in the axial direction of the dynamic cable ,
The plurality of binders are configured to suppress stripping of the strip from the cable core and unraveling of the strip with respect to linear changes in the dynamic cable more than a dynamic cable without the binder.
A method of manufacturing a dynamic cable. A method for manufacturing a dynamic cable that is bendably connected to a floating facility underwater,
a step of preparing a cable intermediate comprising a cable wire core having a conductor and an insulating layer provided so as to surround the outer periphery of the conductor;
forming a protective layer so as to surround the outer circumference of the cable core of the cable intermediate;
has
In the step of forming the protective layer,
The protective layer is configured to attract less aquatic organisms than a dynamic cable without the protective layer, and
A plurality of protective layers are laminated in the radial direction of the dynamic cable,
An outer protective layer of the plurality of protective layers is configured to be detachable from an inner protective layer.
A method of manufacturing a dynamic cable. 12. The method of manufacturing a dynamic cable according to claim 10 , wherein the step of forming the protection layer is performed on a laying ship for laying the dynamic cable. A method for laying a dynamic cable that is bendably connected to a floating facility underwater,
a step of preparing a cable intermediate comprising a cable wire core having a conductor and an insulating layer provided so as to surround the outer periphery of the conductor;
forming a protective layer so as to surround the outer circumference of the cable core of the cable intermediate;
sending the dynamic cable with the protective layer into the water;
has
In the step of forming the protective layer,
The protective layer is configured to attract less aquatic organisms than a dynamic cable without the protective layer, and
Forming a layer containing a belt-shaped body wound around the outer circumference of the cable core as the protection layer,
After the step of forming the protective layer and before the step of sending the dynamic cable into the water,
A plurality of binders for binding the cable core and the belt-shaped body from the outer peripheral side of the belt-shaped body are arranged at predetermined intervals in the axial direction of the dynamic cable ,
The plurality of binders are configured to suppress stripping of the strip from the cable core and unraveling of the strip with respect to linear changes in the dynamic cable more than a dynamic cable without the binder.
Dynamic cable laying method. A method for laying a dynamic cable that is bendably connected to a floating facility underwater,
a step of preparing a cable intermediate comprising a cable wire core having a conductor and an insulating layer provided so as to surround the outer periphery of the conductor;
forming a protective layer so as to surround the outer circumference of the cable core of the cable intermediate;
sending the dynamic cable with the protective layer into the water;
has
In the step of forming the protective layer,
The protective layer is configured to attract less aquatic organisms than a dynamic cable without the protective layer, and
A plurality of protective layers are laminated in the radial direction of the dynamic cable,
An outer protective layer of the plurality of protective layers is configured to be detachable from an inner protective layer.
Dynamic cable laying method.

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