CN203118637U - Submarine alternating current power cable - Google Patents

Abstract

A submarine AC power cable relates to a cable. Existing cables consume a large amount of copper and are expensive. The utility model is characterized in that it includes a wire core, a shielding layer, an insulating layer, an insulator shielding layer, an inner sheath, an armored inner pad, an armored layer, and an armored outer protective layer arranged from the inside to the outside; The layer includes a semiconductor electrical tape and a conductor shielding layer. The wire core is wrapped in the semiconductor electrical tape, and the semiconductor electrical tape is wrapped in the conductor shielding layer. The wire core is a conductor twisted by an aluminum alloy conductor. The wire core is made of aluminum alloy instead of copper. The tensile strength of the aluminum alloy wire is sufficient. Under the action of AC voltage, there is no hysteresis loss and eddy current loss in the wire. The technical and economic effect is good, and the power saving benefit is high. At the same time, reduce production costs.

Description

A submarine AC power cable

technical field

The utility model relates to a cable.

Background technique

An existing Chinese invention patent No. 200720108676.8 titled "A Submarine Cross-Linked Power Cable" discloses a structure, which includes a wire core, an armored inner lining, an armored layer and The armored outer sheath is characterized in that the armored layer is composed of a number of non-magnetic metal wires evenly arranged in a circle, and the non-magnetic metal wires are provided with a plastic anti-corrosion layer; the advantage is that the non-magnetic metal wire armor structure replaces the galvanized steel wire armor The armored structure not only eliminates the serious eddy current and hysteresis loss caused by the galvanized steel wire armored structure, but also makes the allowable current carrying capacity nearly 30% higher than that of the galvanized steel wire armored cable, and ensures that the submarine cross-linking The tensile strength of the power cable; there is a plastic anti-corrosion layer on the outside of the non-magnetic metal wire, so that the non-magnetic metal wire armored cable can be placed in seawater for a long time without being corroded. But making this kind of cable consumes a lot of copper, and the cost is high, so its structure still needs to be improved.

Utility model content

The technical problem to be solved and the technical task proposed by the utility model are to perfect and improve the existing technical solutions and provide a submarine AC power cable to achieve the purpose of low cost and high tensile strength. For this reason, the utility model takes the following technical solutions.

A submarine AC power cable, characterized in that it includes a wire core, a shielding layer, an insulating layer, an insulator shielding layer, an inner sheath, an armored inner cushion, an armored layer, and an armored outer protective layer arranged from the inside to the outside The shielding layer includes a semiconductor electric tape and a conductor shielding layer, and the wire core is wrapped in the semiconductor electric tape, and the semiconductor electric tape is wrapped in the conductor shielding layer, and the described wire core is a conductor stranded by an aluminum alloy conductor . The wire core is made of aluminum alloy instead of copper. The tensile strength of the aluminum alloy wire is sufficient. Under the action of AC voltage, there is no hysteresis loss and eddy current loss in the wire. The technical and economic effect is good, and the power saving benefit is high. At the same time, reduce production costs. The aluminum alloy wire can be a medium-strength aluminum alloy wire SI-26 (AAAC wire); the semiconductor electric tape is used as a shielding layer of a semi-conductive material attached to the surface of the conductor, which is used to uniform the electric field on the outer surface of the conductor and avoid the conductor surface being not smooth. And the air gap generated by the stranding of the cores causes partial discharge of the conductor and insulation. The conductor shielding layer is made of copper tape, which passes capacitive current during normal operation; when the system is short-circuited, it serves as a channel for short-circuit current and also plays a role in shielding the electric field.

As a further improvement and supplement to the above technical solution, the utility model also includes the following additional technical features.

The armored layer includes an inner armored layer and an outer armored layer arranged on the outer periphery of the inner armored layer. Two layers of armor inside and outside are used to improve the mechanical strength. the

The armored inner cushion layer is an asphalt outer wrapping layer with polypropylene rope as the internal reinforcement, and the armored outer protective layer is a polyurethane layer.

The inner armor layer is composed of short-pitch single-wire twisted aluminum alloy wires; the outer armor layer is composed of a plurality of galvanized steel wires or galvanized steel wires and aluminum alloy wires uniformly arranged in the circumferential direction. The outer aluminum alloy wire is used for magnetic isolation.

The galvanized steel wires and aluminum alloy wires are arranged at intervals.

The insulator shielding layer and the inner sheath include an insulating shielding layer, a semiconductive resistance water buffer layer, a copper tape wrapping layer, a semiconductive resistance water buffer layer, a lead sheath, and a semiconductive polyethylene inner liner. The shielding layer, the semiconductive resistance water buffer layer, the copper tape wrapping layer, the semiconductive resistance water buffer layer, the lead sheath, and the semiconductive polyethylene lining layer are arranged in sequence from inside to outside. The insulating shielding layer is in good contact with the outer surface of the insulating layer, and has the same potential as the metal sheath, so as to avoid partial discharge with the metal sheath due to defects such as cracks on the cable insulation surface. The semiconductive resistive water buffer layer has the characteristics of strong hygroscopicity, large expansion rate, fast expansion rate, and low resistance. It can effectively buffer and weaken the electric field strength, and constitutes a complete and excellent longitudinal water-blocking structure on the cable insulation shielding surface.

The armor layer is provided with light units. The armor layer is equipped with an optical unit for communication, which realizes the function that the submarine power cable can not only transmit electric energy, but also perform digital communication; with the help of detection equipment, the optical unit can also monitor the temperature and stress of the cable to improve the operating efficiency. reliability and safety.

The optical unit includes an optical cable and a polyethylene filling line, the cross-sections of the optical cable and the polyethylene filling line are located on the same circumferential surface; the polyethylene filling line, the optical cable, and the polyethylene filling line are arranged circumferentially in sequence The smallest light unit, the smallest light unit is arranged repeatedly in the circumferential direction. The polyethylene filling wire is mainly used to bear the pressure and protect the optical cable.

The armor layer is provided with two sets of opposite minimum light units, and the rest of the circumferential surface is made of aluminum alloy wires.

Beneficial effect:

1. The wire core is made of aluminum alloy instead of copper. The tensile strength of the aluminum alloy wire is sufficient. Under the action of alternating current, there is no hysteresis loss and eddy current loss in the wire. The technical and economic effects are good, and the power saving benefit is high. While improving the tensile strength, the production cost is reduced.

2. The inner armor layer is stranded with short-pitch single wires outside the inner cushion layer and the outer armor layer (or galvanized steel wires and aluminum alloy wires are evenly arranged) outside the inner armor layer that are evenly arranged in the circumferential direction Composed of double-layer armor, the outer armor layer of the short-pitch single-wire stranded aluminum alloy wire will significantly improve the compressive performance of the cable, and make its bending stiffness less than that of the long-pitch armor; this can better prevent External injuries from rocks, falling objects and towed equipment.

3. The armored outer protective layer is a polyurethane layer, which improves the wear resistance of the armored outer sheath, prolongs the service life of the cable, and the anti-corrosion performance also fully meets the standards.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is an enlarged view of part A of Fig. 1 .

Fig. 3 is an enlarged view of part B of Fig. 1 .

Fig. 4 is a schematic diagram of the second structure of the utility model.

Fig. 5 is a schematic diagram of the third structure of the utility model.

In the figure: 1-wire core; 2-shielding layer; 21-semiconductor electric belt; 22-conductor shielding layer; 3-insulating layer; 4-inner sheath; 41-insulating shielding layer; 42-semiconducting resistance water buffer layer ; 43-copper tape wrapping layer; 44-lead sheath; 45-semiconductive polyethylene inner lining; 5-armoured inner pad; 6-armored layer; 60-inner armored layer; layer; 62-aluminum alloy wire; 63-galvanized steel wire; 7-armoured outer protective layer; 80-optical cable; 81-polyethylene filling wire.

Detailed ways

The technical solution of the utility model is described in further detail below in conjunction with the accompanying drawings of the description.

Embodiment one:

As shown in Figures 1, 2, and 3, the utility model includes a wire core 1, a shielding layer 2, an insulating layer 3, an insulator shielding layer and an inner sheath 4, an armored inner cushion 5, and an armored inner layer arranged from the inside to the outside. Layer 6, armor outer protective layer 7. The shielding layer 2 includes a semiconductor electrical tape 21 and a conductor shielding layer 22 , the wire core 1 is wrapped in the semiconductor electrical tape 21 , and the semiconductor electrical tape 21 is wrapped in the conductor shielding layer 22 . Wherein, the wire core 1 is a conductor formed by twisting aluminum alloy wires. The armored inner cushion layer 5 is an asphalt outer wrapping layer with polypropylene rope as the internal reinforcement. In order to improve wear resistance, the armored outer protective layer 7 is a polyurethane layer.

Embodiment two:

As shown in Figure 4, the difference from Embodiment 1 is that: in order to improve the strength, the armor layer 6 is composed of an inner armor layer 60 and an outer armor layer 61; the inner armor layer 60 is a short joint outside the inner pad layer The aluminum alloy wire armor layer stranded with a single wire, the outer armor layer 60 is an armor layer composed of a plurality of galvanized steel wires 63 uniformly arranged in the outer armor layer 61, or the outer armor layer 61 is The armor layer is composed of a plurality of galvanized steel wires 63 evenly arranged in the circumferential direction and at least one aluminum alloy wire 62, and the galvanized steel wires 63 and the aluminum alloy wires 62 are arranged at intervals. The insulator shielding layer includes an insulating shielding layer 41, a semiconductive resistance water buffer layer 42, a copper tape wrapping layer 43, and a semiconductive resistance water buffer layer 42; Shielding layer 41, semiconductive resistance water buffer layer 42, copper tape wrapping layer 43, semiconductive resistance water buffer layer 42, lead sheath 44, and semiconductive polyethylene lining layer 45 are arranged in sequence from inside to outside.

Embodiment three,

As shown in Figure 5, the difference from Embodiment 1 is that an optical unit is provided in the armor layer 6; On the same circumferential surface; polyethylene filling lines 81, optical cables 80, and polyethylene filling lines 81 are arranged circumferentially in turn to form the minimum light unit, and the minimum light units are arranged repeatedly in the circumferential direction. In this embodiment, there are two sets of minimum light units , and the rest are aluminum alloy wires 62. Of course, the optical unit can also be arranged in the inner armor layer 60 in the second embodiment.

A submarine AC power cable shown in Figures 1-5 above is a specific embodiment of the utility model, which has already reflected the substantive features and progress of the utility model, and can be used according to actual needs, under the inspiration of the utility model, Equivalent modification of its shape, structure and other aspects are all within the scope of protection of this scheme.

Claims (10)

1. A submarine AC power cable, characterized in that: it includes a wire core (1), a shielding layer (2), an insulating layer (3), an insulator shielding layer and an inner sheath (4), and an armor The inner cushion layer (5), the armor layer (6), and the armor outer protective layer (7); the shielding layer (2) includes a semiconductor electrical tape (21), a conductor shielding layer (22), and a core ( 1) Wrapped in the semiconductor electric tape (21), the semiconductor electric tape (21) is wrapped in the conductor shielding layer (22); the wire core (1) is a conductor stranded by an aluminum alloy conductor. 2. A submarine AC power cable according to claim 1, characterized in that: said armor layer (6) comprises an inner armor layer (60) and an outer shell provided on the outer periphery of the inner armor layer (60). Armor layer (61). 3. A submarine AC power cable according to claim 1, characterized in that: said armored outer protective layer (7) is a polyurethane layer, and said armored inner cushion layer (5) is made of polypropylene Rope as bitumen overwrap for internal stiffeners. 4. A submarine AC power cable according to claim 2, characterized in that: the inner armor layer (60) is composed of aluminum alloy wires (60) twisted with short-pitch single wires; The armor layer (61) is composed of a plurality of galvanized steel wires (63) uniformly arranged in the circumferential direction. 5. A submarine AC power cable according to claim 2, characterized in that: the inner armor layer (60) is composed of short-pitch single-wire twisted aluminum alloy wires outside the inner cushion layer; The outer armor layer (61) is composed of a plurality of galvanized steel wires (63) and aluminum alloy wires (62) arranged uniformly in the circumferential direction outside the inner cushion layer. 6. The submarine AC power cable according to claim 5, characterized in that: the galvanized steel wires (63) and the aluminum alloy wires (62) are arranged at intervals. 7. A submarine AC power cable according to claim 1, characterized in that: the insulator shielding layer and the inner sheath include an insulating shielding layer (41), a semiconductive resistance water buffer layer (42), a copper tape Wrapping layer (43), semiconductive resistance water buffer layer (42), lead sheath (44), semiconductive polyethylene lining layer (45), the insulating shielding layer (41), semiconductive resistance water buffer layer (42), copper tape wrapping layer (43), semiconductive resistance water buffer layer (42), lead sheath (44), semiconductive polyethylene lining layer (45) are arranged in sequence from inside to outside. 8. The submarine AC power cable according to any one of claims 1-7, characterized in that: the armor layer (6) is provided with an optical unit for communication. 9. A submarine AC power cable according to claim 8, characterized in that: the optical unit includes an optical cable (80), a polyethylene filling line (81), and the optical cable (80), poly The cross-sections of the vinyl filling wires (81) are located on the same circumferential surface; the polyethylene filling wires (81), the optical cables (80), and the polyethylene filling wires (81) are arranged circumferentially in sequence to form the smallest optical unit, and the smallest optical unit circumferentially Repeat arrangement. 10. A submarine AC power cable according to claim 9, characterized in that two sets of opposing minimum light units are arranged in the armor layer, and aluminum alloy wires (63) are used on the remaining circumferential surfaces.

Images