CN219534101U - Shock-resistant protective submarine cable - Google Patents

Abstract

The utility model relates to an impact-resistant protective submarine cable, and belongs to the technical field of submarine cables. The technical proposal is as follows: the cable is characterized in that a water-blocking conductor, a conductor shield, XLPE insulation, an insulation shield, a semiconductive water-blocking layer, a metal shield layer, a water-blocking layer, a filling layer, a cable-forming wrapping belt, an inner protective layer, a metal wire armor layer and an outer protective layer are sequentially arranged from inside to outside, and the cable-forming wrapping belt is externally extruded with a foaming polyurethane inner sheath (9) to form the inner protective layer; the inner protection layer is externally wrapped with a steel wire metal armor (10), and each steel wire of the steel wire metal armor (10) is externally extruded with a polyethylene sheath (11) to form a metal wire armor layer; the metal wire armor layer is wrapped with a semi-conductive water-blocking tape (12), and the semi-conductive water-blocking tape is wrapped with a polyurethane sheath material (13) in an extruding mode to form an outer protective layer. According to the utility model, the elastic sheath material is used for protection, the foaming elastic deformation of the elastic sheath material is used for absorbing the external impact kinetic energy, so that the potential safety hazard of the submarine cable is eliminated, and the service life of the submarine cable is prolonged.

Description

Shock-resistant protective submarine cable

Technical Field

The utility model relates to an impact-resistant protective submarine cable, and belongs to the technical field of submarine cables.

Background

Submarine cables are laid on the sea and under rivers for telecommunication transmission, and modern submarine cables all use optical fibers as materials for transmitting telephone and internet signals. The safety protection of the cable is particularly important. In the process of laying and using the submarine cable, in order to protect the integrity of the cable structure and the electrical safety performance, the submarine cable in the prior art generally has a steel wire armor structure, however, when the cable is subjected to mechanical external force, the steel wire armor cannot absorb external impact energy, part of energy is transmitted into the cable, the cable core and the optical cable of the submarine cable can be damaged, and potential safety hazards are caused.

Disclosure of Invention

The utility model aims to provide an impact-resistant protective submarine cable, which is protected by an elastomer sheath material, absorbs external impact kinetic energy by self foaming elastic deformation, eliminates potential safety hazards of the submarine cable, prolongs the service life of the submarine cable and solves the technical problems existing in the prior art.

The technical scheme of the utility model is as follows:

an impact-resistant protective submarine cable comprises a single-core cable, a filling layer, a cable wrapping belt, an inner protective layer, a metal wire armor layer and an outer protective layer, wherein a plurality of single-core cables are formed into cables, and gaps between the cable cores are packed with semi-conductive rubber to form the filling layer; the packing layer is wrapped with the semiconductive buffer water-blocking tape to form a cable wrapping tape; the cable-forming wrapping belt is externally extruded and wrapped with a foaming polyurethane inner sheath to form an inner sheath; the inner protective layer is externally wrapped with steel wire metal armor, and each steel wire of the metal wire armor is externally extruded with a polyethylene sheath to form a metal wire armor layer; the metal wire armor layer is wrapped with a semi-conductive water-blocking tape, and the semi-conductive water-blocking tape is wrapped with a polyurethane sheath material in an extruding mode to form an outer protective layer.

Further, the single-core cable comprises a water-blocking conductor, a conductor shield, XLPE insulation, an insulation shield, a metal shield layer and a water-blocking layer which are sequentially arranged from inside to outside, wherein the water-blocking conductor is externally wrapped with the inner shield of a semi-conductive water-resistant tree to form the conductor shield, the conductor shield is externally wrapped with the cross-linked polyethylene insulation of the water-resistant tree to form the XLPE insulation, the XLPE insulation is externally wrapped with the outer shield of the semi-conductive water-resistant tree to form the insulation shield, the insulation shield is externally wrapped with the metal copper strip shield to form the metal shield layer, and the metal shield layer is externally wrapped with the semi-conductive water-blocking layer.

Further, the water-blocking conductor is formed by twisting and compacting a plurality of single-wire copper conductors, and the gaps of the copper conductor single wires are filled with water-blocking yarns and water-blocking powder.

Each steel wire of the metal wire armor is externally extruded with a polyethylene sheath, the steel wire armor with the polyethylene sheath reduces the impact of the steel wire armor on the cable directly, and the insulating wire core is further protected; the quality risk that the steel wire metal armor can not fully absorb external impact energy and partial energy is transmitted to the inside of the cable and potentially damages a cable core wire is solved.

The utility model has the positive effects that: the foam polyurethane inner sheath is adopted as the inner sheath, deformation of the inner sheath is used for absorbing external impact kinetic energy, external impact energy is fully absorbed, and the insulated wire core is protected from being damaged by external impact; the foam polyurethane inner sheath is closed-hole foamed, deformation of the self-foaming body is used for absorbing external impact kinetic energy, and the risk that insulation is damaged by external impact energy generated by deformation of steel wire metal armor is solved. The steel wire outer extrusion polyethylene sheath adopting the metal wire armor increases the buffering of the steel wire, the inner sheath and the outer sheath, solves the problem that the steel wire metal armor can not fully absorb external impact energy completely, and part of energy is transferred into the cable, thereby potentially damaging the quality risk of the cable core wire.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

in the figure: copper conductor 1, semiconductive water-resistant tree inner shielding 2, water-resistant tree crosslinked polyethylene insulation 3, graphene semiconductive water-resistant tree outer shielding 4, metal copper strip shielding 5, semiconductive water-resistant strip 6, semiconductive rubber filling 7, semiconductive buffer water-resistant strip 8, foamed polyurethane inner sheath 9, steel wire metal armor 10, polyethylene sheath 11, semiconductive water-resistant strip 12 and polyurethane sheath material 13.

Detailed Description

The utility model is further described by way of examples with reference to the accompanying drawings.

With reference to fig. 1, the embodiment provides an impact-resistant protection submarine cable, which comprises a single-core cable, a filling layer, a cabling tape, an inner protection layer, a wire armor layer and an outer protection layer.

The single-core cable comprises a water-blocking conductor, a conductor shield, XLPE insulation, an insulation shield, a metal shield layer and a water-blocking layer which are sequentially arranged from inside to outside, wherein the conductor shield is formed by extruding a semi-conductive water-resistant tree inner shield 2, the XLPE insulation is formed by extruding a water-resistant tree crosslinked polyethylene insulation 3 outside the conductor shield, the insulation shield is formed by extruding a graphene semi-conductive water-resistant tree outer shield 4 outside the XLPE insulation, the metal shield layer is formed by wrapping a metal copper strip shield 5 outside the insulation shield, and the water-blocking layer is formed by wrapping a semi-conductive water-blocking strip 6 outside the metal shield layer.

Forming three single-core cables, and extruding semiconducting rubber filling 7 to form a filling layer in the gaps between the cable cores; the packing layer is externally wrapped with a semiconductive buffer water blocking belt 8 to form a cable wrapping belt; the cable-forming wrapping belt is externally extruded and wrapped with a foaming polyurethane inner sheath 9 to form an inner sheath; the inner protective layer is externally wrapped with steel wire metal armor 10, and each steel wire of the metal wire armor 10 is externally extruded with a polyethylene sheath 11 to form a metal wire armor layer; the metal wire armor layer is wrapped with the semiconductor water-resistance belt 12, and the polyurethane sheath material 13 is extruded outside the semiconductor water-resistance belt 12 to form an outer protective layer.

In the embodiment, the water-blocking conductor is formed by twisting and compacting a plurality of single wires of copper conductors 1, and the gaps of the single wires of the copper conductors 1 are filled with water-blocking yarns and water-blocking powder; the outer extrusion-coated semiconductive water-resistant tree inner shield 2 of the water-blocking conductor forms a conductor shield, the outer extrusion-coated water-resistant tree crosslinked polyethylene insulation 3 of the conductor shield forms XLPE insulation, the outer extrusion-coated graphene semiconductive water-resistant tree outer shield 4 of the XLPE insulation forms an insulation shield, and insulation electrical insulation and water-resistant tree performance are guaranteed. The insulating shielding is externally wrapped with the metal copper strip shielding 5 to form a metal shielding layer, the thickness of the metal copper strip shielding 5 is more than or equal to 0.10mm, and the coverage rate of the metal copper strip is more than or equal to 15%; the semi-conductive water-blocking tape 6 is wrapped outside the metal shielding layer to form a water-blocking layer, so that the water-blocking performance of the wire core is ensured. The semi-conductive water blocking tape 6 is wrapped to form a single-core cable. The three single-core cables are cabled, a cable core gap is extruded with a semi-conductive rubber filling 7 to form a filling layer, and a semi-conductive buffer water blocking belt 8 is wrapped outside the filling layer to form a cabled wrapping belt.

In the embodiment, the water-blocking conductor adopts a conductor water-blocking technology, the monofilament gaps are filled with water-blocking yarns and water-blocking powder, and particularly, the longitudinal water blocking of the cable conductor under high water level is realized by adopting an electrostatic spraying technology of superfine water-blocking powder.

The insulating extrusion of the conductor shield, XLPE insulation and the insulating shield adopts a dry-method crosslinking three-layer coextrusion technology, so that the water tree resistance of the insulation is ensured.

The foaming polyurethane inner sheath 9 is made of polyurethane sheath foaming material and is formed by combining modified polyurethane and expansion microspheres, and the Shore hardness of the polyurethane is 65-85; specifically, 100 parts of modified polyurethane sheath material are uniformly mixed, and 2.0-3.0% of expansion microspheres are heated and expanded rapidly when reaching a certain temperature to form a spherical microporous closed-cell foam body. The foamed inner sheath has no foam cells, so that the defects of uneven foam cells, broken foam cells, poor rebound resilience of the foam cells and the like are avoided, and the complete spherical structure ensures good mechanical property and impact resistance.

Each steel wire of the metal wire armor layer is externally extruded with a polyethylene sheath 11, so that buffering of the steel wires, the inner sheath and the outer sheath is increased, and the concrete scheme is as follows: the polyethylene sheath is extruded outside each steel wire, the polyethylene sheath is a low-density polyethylene sheath and has better buffering protection, and then a plurality of extruded steel wires with the polyethylene sheath are wrapped on the surface of the foaming polyurethane inner sheath. The wrapping direction is left, and the wrapping pitch is 8-10 times of the outer diameter of the cable before wrapping. The steel wire armor with the polyethylene sheath reduces the impact of the steel wire armor on the cable directly, and further protects the insulated wire core.

Claims (3)

1. An impact-resistant protective submarine cable, which is characterized in that: the cable comprises a single-core cable, a filling layer, a cable-forming wrapping belt, an inner protective layer, a metal wire armor layer and an outer protective layer, wherein a plurality of single-core cables are formed into cables, and a cable-forming core gap is extruded with a semi-conductive rubber filling (7) to form the filling layer; the packing layer is wrapped with a semiconductive buffer water blocking tape (8) to form a cable wrapping tape; the cable-forming wrapping belt is externally extruded with a foaming polyurethane inner sheath (9) to form an inner sheath; the inner protection layer is externally wrapped with a steel wire metal armor (10), and each steel wire of the steel wire metal armor (10) is externally extruded with a polyethylene sheath (11) to form a metal wire armor layer; the metal wire armor layer is wrapped with a semiconductor water-resistance belt (12), and the semiconductor water-resistance belt (12) is wrapped with a polyurethane sheath material (13) in an extrusion mode to form an outer protective layer.

2. An impact resistant shielded submarine cable according to claim 1, wherein: the single-core cable comprises a water-blocking conductor, a conductor shield, XLPE insulation, an insulation shield, a metal shield layer and a water-blocking layer which are sequentially arranged from inside to outside, wherein the conductor shield is formed by extruding a semi-conductive water-resistant tree inner shield (2) outside the water-blocking conductor, the XLPE insulation is formed by extruding a water-resistant tree crosslinked polyethylene insulation (3) outside the conductor shield, the insulation shield is formed by extruding a graphene semi-conductive water-resistant tree outer shield (4) outside the XLPE insulation, the metal shield layer is formed by winding a metal copper strip shield (5) outside the insulation shield, and the water-blocking layer is formed by winding a semi-conductive water-blocking tape (6) outside the metal shield layer.

3. An impact resistant shielded submarine cable according to claim 2, wherein: the water-blocking conductor is formed by twisting and compacting a plurality of single-wire copper conductors (1), and the gaps of the single wires of the copper conductors (1) are filled with water-blocking yarns and water-blocking powder.