CN203325525U

CN203325525U - Crosslinking polyethylene insulation multi-core submarine cable

Info

Publication number: CN203325525U
Application number: CN2013203653481U
Authority: CN
Inventors: 王军; 王佳伟
Original assignee: Jiangsu Hongfeng Cable Group Co Ltd
Current assignee: Jiangsu Hongfeng Cable Group Co Ltd
Priority date: 2013-06-25
Filing date: 2013-06-25
Publication date: 2013-12-04
Anticipated expiration: 2023-06-25

Abstract

The utility model discloses a crosslinking polyethylene insulation multi-core submarine cable. The submarine cable comprises a cable core formed by twisting three insulation cores; the gap of the cable core is provided with a filling layer; a copper braiding fiber tape, a lead sheath, an liner layer and an armor layer are successively wrapped outside the cable core; the outer most layer of the cable is wrapped with an outer sheath in an extruding manner; four centrosymmetric fiber units are arranged in the armor layer; the insulation cores are composed of conductors, and insulation layers and insulation shielding layers which are wrapped outside the conductors in an extruding manner; and the fiber units are composed of fibers and fiber armor layers wrapped outside the fibers. The crosslinking polyethylene insulation multi-core submarine cable has the advantages of higher insulation performance, water blocking performance, stretching resistance performance and anticorrosion performance, thereby being adaptive to the requirements for seabed laying and operation.

Description

A kind of crosslinked polyetylene insulated multicore submarine cable

Technical field

The utility model relates to the electric wire field, specifically refers to a kind of crosslinked polyetylene insulated multicore submarine cable.

Background technology

Along with carrying forward vigorously and the needs of national defense construction of the continuous enhancing of china's overall national strength and ocean development, the coastal people are in order to improve environment simultaneously, improve production, quality of life, demand to electric power, communication constantly strengthens, for big-length high pressure and superhigh pressure subsea power optical communication composite rope, the wide market prospects of the amount of providing are provided in developmental research.Particularly new oil gas field is constantly found in China shallow sea, as Bohai Sea Gulf, Eastern South China Sea and western last year verified minable petroleum and natural gas storage capacity, constantly increase, therefore, in recent years in extra large petroleum system will need a large amount of sea electric power cables, extra large photoelectric composite submarine cable, power cable, control cables and signal cable for platform.Still need at present import submarine cable and sea floor optoelectronic composite cable.

At present, in telecommunication cable, submarine cable comprises submarine communication cable and sea electric power cable.Wherein, submarine communication cable is mainly used in long distance communication net, as between remote island and the communication traffic of the more important occasion such as military installations over strait, and somewhat expensive, but privacy degrees is high; Laying apart from laying apart from much shorter than telecommunication cable of sea electric power cable, be mainly used between the island, land, cross rivers or bay, from being connected to each other between land connection drilling platforms or drilling platforms etc., can also be for transmitting high-power power under water, with the effect of underground power cable, be equal to, just application scenario is different with system of laying.

In addition, because the use occasion of submarine cable is more special, environment is more severe, all higher to the requirement of the performances such as water resistance, decay resistance and stretching resistance level.So, when China applies heavy in section sea electric power cable, still need import.

But in realizing process of the present utility model, utility model people finds in prior art at least to exist that water resistance is poor, poor corrosion resistance, stretching resistance poor performance, cost is high and the defects such as the mounting and installation difficulty is large.

The utility model content

The technical problems to be solved in the utility model is to provide a kind of have higher insulation property, block-water performance, stretching resistance performance, Corrosion Protection, adapts to the crosslinked polyetylene insulated multicore submarine cable of laying down on sea bottom, operation demand.

A kind of crosslinked polyetylene insulated multicore submarine cable described in the utility model, comprise by the stranded cable core formed of three eradication edge cores, the gap of cable core is provided with packed layer, wrap up successively copper braided fiber band, lead sheath, inner covering, armour outside cable core, at the cable outermost layer, extrude outer jacket; Place and there are centrosymmetric four fiber units in armour.

Further improve, described insulated wire cores is by conductor and be extruded in conductor outer insulating barrier, insulation screen and form.

Further improve, described fiber unit is by optical fiber and is coated on the outer optical fiber armoured layer of optical fiber and forms.

Further improve, the thickness of insulation screen is 1.0mm again; The thickness of copper braided fiber band is 2.0mm; Described lead sheath (7) adopts continuous expressing technique to make, and thickness is 2.5mm; Described inner covering (8) is made by the elastomeric material with imbibition characteristic is wrapped, and thickness is 3.0mm.

The utility model has the advantage of:

(1) selecting copper is conductor material, and discharge capacity is large; Add water-proofing powder between the copper single line, so that conductor has the performance of longitudinal water-blocking.

(2) the application insulation screen effectively improves electric field, prevents partial discharge, improves electric property; Produce the main insulation of cable with crosslinked polyethylene D.C. isolation material, thickness is 10.0mm, both can meet the needs of long-term direct-current working volts, can bear the requirement to insulation of polarity inversion and DC stacked temporary overvoltage simultaneously, and the problems such as the blocked up waste of raw materials caused that prevents from insulating, the outside diameter of cable are large, transportation and laying installation difficulty;

(3) adopt the copper braided fiber band of 2.0mm thickness, there is the imbibition characteristic, can prevent that moisture is along the cable axial dispersion, protect that cable insulation avoids that high temperature in the metallic sheath extrusion is scalded and laid, the mechanical force damage in running simultaneously; In addition, this layer has the semiconductive characteristic, by it, can realize effectively electrically contacting of metallic sheath and insulation shielding, prevents by internal field and concentrates the partial discharge caused;

(4) adopt the metal sheath of smooth lead sheath as cable, and employing integral extrusion technique, thickness is 3.0mm, mechanical force in the time of can bearing mounting and installation and operation, also can play the radially function of waterproof simultaneously, and Corrosion Protection preferably can be provided, adapt to the needs of laying down on sea bottom, operation;

(5) adopt the individual layer wire armoring, and the armouring single line is adopted in addition anti-corrosion protection of independent polymer jacket; As long as this layer of sheath do not fallen by the drift sand erosion, just can avoid single line to contact with the direct of seawater, thereby the operational reliability of Corrosion Protection and the cable of armour is provided greatly.

(6) fiber unit is consisted of optical fiber, stainless steel tube and plastic sheath.Optical fiber is placed in stainless steel tube, and stainless steel tube is placed in plastic sheath, and the diameter of plastic sheath is equal to or slightly lower than the diameter of armoury wire, so that optical cable unit can replace the position of an armoury wire.The effect of plastic sheath is the couple corrosion prevented between stainless steel tube and armoury wire, and the inner tiny tubing of protection is avoided extruding.Fiber unit is integrated in submarine cable, has following functions: distributed temperature monitoring (DTS); Transfer of data; Cable strain or vibration measurement; Fault-finding and location; The variation of exploration cable route, as the sedimental variation covered on cable.

(7) pe sheath is as the outer jacket of cable, effectively waterproof protect armour to avoid the Environmental electrochemistry corrosion.

The accompanying drawing explanation

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

Embodiment:

As shown in Figure 1, a kind of crosslinked polyetylene insulated multicore submarine cable described in the utility model, comprise by the stranded cable core formed of three eradication edge cores, the gap of cable core is provided with packed layer 4, wrap up successively copper braided fiber band 5, lead sheath 6, inner covering 7, armour 8 outside cable core, at the cable outermost layer, extrude outer jacket 9; Place and there are centrosymmetric four fiber units 12 in armour 9; Described insulated wire cores is by conductor 1 and be extruded in conductor 1 outer insulating barrier 2, insulation screen 3 and form; Described fiber unit 12 is by optical fiber 10 and is coated on the outer optical fiber armoured layer 11 of optical fiber 10 and forms.

Conductor 1 described above adopts and forms copper stranded pressing of single line, and cross section is circular configuration, and sectional area is 400 mm ², 650 mm ²Or 700 mm ²The thickness of described insulation screen 3 is 1.0mm; The thickness of copper braided fiber band 5 is 2.0mm; Described lead sheath 6 adopts continuous expressing technique to make, and thickness is 2.5mm; Described inner covering 7 is made by the elastomeric material with imbibition characteristic is wrapped, and thickness is 3.0mm.Described outer jacket 11 adopts the polythene material continuous extrusion, and thickness is 4.0mm.

The utility model provides a kind of crosslinked polyetylene insulated multicore submarine cable form and implementation method; the above is only preferred implementation method of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvement, these improvement also should be considered as protection range of the present utility model.

Claims

1. a crosslinked polyetylene insulated multicore submarine cable, it is characterized in that: comprise by the stranded cable core formed of three eradication edge cores, the gap of cable core is provided with packed layer (4), wrap up successively copper braided fiber band (5), lead sheath (6), inner covering (7), armour (8) outside cable core, at the cable outermost layer, extrude outer jacket (9); Place and there are centrosymmetric four fiber units (12) in armour (9).

2. crosslinked polyetylene insulated multicore submarine cable according to claim 1 is characterized in that: described insulated wire cores is by conductor (1) and be extruded in the outer insulating barrier (2) of conductor (1), insulation screen (3) forms.

3. crosslinked polyetylene insulated multicore submarine cable according to claim 1 is characterized in that: described fiber unit (12) is by optical fiber (10) and is coated on the outer optical fiber armoured layer (11) of optical fiber (10) and forms.

4. crosslinked polyetylene insulated multicore submarine cable according to claim 2 is characterized in that: described conductor (1) adopts and forms copper stranded pressing of single line, and cross section is circular configuration, and sectional area is 400 mm ², 650 mm ²Or 700 mm ².

5. crosslinked polyetylene insulated multicore submarine cable according to claim 2, it is characterized in that: the thickness of described insulation screen (3) is 1.0mm.

6. crosslinked polyetylene insulated multicore submarine cable according to claim 1, it is characterized in that: the thickness of described copper braided fiber band (5) is 2.0mm.

7. crosslinked polyetylene insulated multicore submarine cable according to claim 1, it is characterized in that: described lead sheath (6) adopts continuous expressing technique to make, and thickness is 2.5mm.

8. crosslinked polyetylene insulated multicore submarine cable according to claim 1, it is characterized in that: described inner covering (7) is made by the elastomeric material with imbibition characteristic is wrapped, and thickness is 3.0mm.