CN210006533U

CN210006533U - direct current submarine cable for deep sea

Info

Publication number: CN210006533U
Application number: CN201920961114.0U
Authority: CN
Inventors: 邓雪娇; 郑琳; 韩哲; 王玉芬; 陈仁栋; 荆彪
Original assignee: NINGBO ORIENT WIRES CABLES CO Ltd
Current assignee: NINGBO ORIENT WIRES CABLES CO Ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-01-31
Anticipated expiration: 2029-06-25

Abstract

The utility model discloses an kind of direct current submarine cable for deep sea, including the conductive layer that blocks water that sets gradually from inside to outside, the semiconductor water-blocking area, the internal shield layer, the insulating layer, the external shield layer, the semiconduction water-blocking area, the lead sheath, semiconduction PE sheath, the inner liner, the filling layer, outer armor and oversheath, the conductive layer that blocks water includes that center conductor and multilayer encircle the annular conductor layer that sets up outside the center conductor, and the coefficient of stiction between the adjacent two-layer annular conductor layer is not less than 0.95, annular conductor layer is surrounded by the concatenation of a plurality of heterotypic conductors head and the tail and is formed, scribble the material that blocks water on the outer wall of every heterotypic conductor, be provided with interior metal armor between semiconductive PE sheath and the inner liner, outer armor is the multilayer armor, its advantage is that the water-blocking nature of submarine cable is improved, increase the compressive strength of.

Description

direct current submarine cable for deep sea

Technical Field

The utility model relates to an kinds of direct current submarine cables especially relate to kinds of direct current submarine cables for deep sea.

Background

With the increasing demand of submarine cables, in order to respond to the requirements of deep-water submarine cables at home and abroad, at present, the alternating current cable is widely applied to land cables and submarine cables, but the alternating current cable generally has the problems of large line loss during power transmission, large diameter and weight and high cost when the transmission capacity is large, the alternating current cable cannot realize long-distance large-capacity power transmission due to the limitation of the transmission distance, and the construction investment required by the alternating current cable is high.

Compared with alternating current transmission, direct current transmission has the advantages of high transmission power, small line loss, convenience in current regulation and power transmission direction change, low investment cost, capability of reducing short-circuit current between a main line and a power grid, small corona radio interference and the like.

The application number 201310042735.6 of the Chinese patent application discloses direct-current submarine cables for +/-320 kV flexible power transmission, which comprise a water-blocking conductor, a conductor shielding layer, an insulating layer and an insulating shielding layer which are sequentially arranged from inside to outside, wherein a semi-conductive water-blocking tape is wrapped outside the insulating shielding layer, an alloy lead sleeve and a PE (polyethylene) sheath are extruded outside the semi-conductive water-blocking tape, an inner lining layer, an armor layer and an outer wrapping layer are arranged outside the PE sheath, the conductor shielding layer and the insulating shielding layer are made of direct-current shielding materials, the insulating layer is made of direct-current cross-linked polyethylene, and the insulating layer is 20-30 mm thick.

Disclosure of Invention

The utility model aims to solve the technical problem that kinds of direct current submarine cables for deep sea that intensity is good and water blocking performance is good are provided.

kinds of deep sea direct current submarine cable, including direct current unit, semi-conductive water-blocking area, plumbous sheath, semi-conductive PE sheath, inner liner, filling layer, outer armor and the oversheath that sets gradually from inside to outside, direct current unit include the conductor layer that blocks water, semiconductor water-blocking area, inner shield layer, insulating layer and the outer shielding layer that sets gradually from inside to outside, the conductor layer that blocks water include central conductor and multilayer encircle the setting central conductor outer annular conductor layer, and the coefficient of stiction between the adjacent two-layer annular conductor layer is not less than 0.95, annular conductor layer form by a plurality of heterotypic conductor head and the tail concatenation encircleing, every the outer wall of heterotypic conductor on scribble the material that blocks water, semi-conductive PE sheath with the inner liner between be provided with the inner metal armor, outer armor be multilayer armor.

The cross section of the special-shaped conductor is L-shaped, Z-shaped, S-shaped, T-shaped or ladder-shaped, or more of the special-shaped conductors are combined for splicing during splicing, a Russian block splicing mode is simulated, gaps among the spliced special-shaped conductors are arranged in a staggered mode in the radial direction, and the water resistance of the water-blocking conductor layer is improved.

The water-blocking material is water-blocking paste, and the filling coefficient of the water-blocking paste is more than or equal to 96%. Is favorable for improving the water resistance of the water-resistant conductor layer.

The inner metal armor layer is formed by wrapping layers of metal belts, so that the radial compressive strength of the submarine cable is improved.

The packing layer is tightly bound by insulating or semi-conducting wrapping bands, the packing layer is formed by or a plurality of optical cables and a plurality of round packing strips in a surrounding mode, and metal wires are arranged on two sides of each optical cable to protect the optical cables from being damaged and increase the compressive strength of the submarine cable.

The outer armor layer is two layers of armor layers, the outer armor layer comprises an th flat steel wire armor layer with a wrapping bag and a second flat steel wire armor layer with a wrapping bag, the th flat steel wire armor layer and the second flat steel wire armor layer are reversely wound, two layers of flat steel wires which are reversely and alternately arranged are adopted, the tensile capacity and the compressive strength of the submarine cable are guaranteed, and meanwhile the torsional balance of the submarine cable in the tension process is guaranteed.

The outer armor layer is three layers of armor layers, and the outer armor layer comprises th flat steel wire armor layers with wrapping, a second flat steel wire armor layer with wrapping and a third flat steel wire armor layer with wrapping, so that the tensile capacity and the compressive strength of the submarine cable are guaranteed, and the torsional balance of the submarine cable in the tension process is guaranteed.

The insulating layer is made of water tree resistant cross-linked polyethylene, PP insulation or paper insulation. Can effectively prevent the generation of water trees.

The inner liner adopts layers of PP ropes to wind the package.

Compared with the prior art, the utility model has the advantages of the utility model discloses a kinds of direct current submarine cables for deep sea are disclosed, because the conductive layer that blocks water includes that central conductor and multilayer encircle the annular conductor layer that sets up outside the central conductor, and the coefficient of stiction between the adjacent two-layer annular conductor layer is not less than 0.95, the annular conductor layer is encircleed by the concatenation of a plurality of heterotypic conductors head and tail and is formed, scribble the material that blocks water on the outer wall of every heterotypic conductor, it is thus visible adopt the concatenation of heterotypic conductor head and tail and scribble the cream that blocks water on the outer wall of heterotypic conductor, can avoid the sea water to go straight in the gap and go out like this, improve submarine cable's the water-blocking nature, because be provided with interior metal armor between semiconductive PE sheath and the inner liner, outer armor is the multilayer armor, thereby play vertical water-blocking's effect, and increase.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The present invention will be described in further detail in with reference to the following embodiments.

Embodiment , as shown in fig. 1, types of deep-sea direct-current submarine cables include a water-blocking conductor layer 1, a semiconductor water-blocking tape 2, an inner shield layer 3, an insulating layer 4, an outer shield layer 5, a semiconductive water-blocking tape 6, a lead sheath 7, a semiconductive PE sheath 8, an inner liner layer 9, a filler layer 10, an outer armor layer 11, and an outer jacket 12, which are sequentially disposed from inside to outside, wherein the insulating layer 4 is made of water-tree-resistant crosslinked polyethylene, PP insulation, or paper insulation, the inner liner layer 9 is wrapped with layers of PP ropes, the inner shield layer 3 is wrapped with a semiconductive material in an extruded manner, the water-blocking conductor layer 1 includes a central conductor 13 and a plurality of annular conductor layers disposed around the central conductor 13, and a compression coefficient between two adjacent annular conductor layers is not less than 0.95, the annular conductor layers are formed by winding a plurality of profiled conductors 14 together end to end, a water-to-end joint material is coated on the outer wall of each profiled conductor 14, the profiled conductor 14 has an L-shaped cross section, Z-shaped, S-shaped, T-shaped, or ladder-shaped cross section of the profiled conductor 14 is formed by winding a flat metal armor layer 3919, and a second armored cable is formed by winding a second armored flat wire cable 18, and a second armored flat wire cable 18, and a second armored flat wire wrapping layer are disposed around an armored flat wire wrapping tape, and a second armored cable 18 and a third armored flat wire wrapping tape, and a third armored cable 18.

The second embodiment has the same structure as the second embodiment , and is different in that the outer armor layer 11 is a three-layer armor, and the outer armor layer 11 includes a -th flat wire armor layer 16 with a wrapping function, a second flat wire armor layer 17 with a wrapping function, and a third flat wire armor layer with a wrapping function.

In the third embodiment, the other structures are the same as those of the second embodiment, and the differences are as follows: the water-blocking material is water-blocking paste, and the filling coefficient of the water-blocking paste is more than or equal to 96 percent.

Claims

The direct-current submarine cable for the deep sea comprises a direct-current unit, a semiconductive water-blocking tape, a lead sheath, a semiconductive PE sheath, an inner liner, a filling layer, an outer armor layer and an outer sheath which are sequentially arranged from inside to outside, wherein the direct-current unit comprises a water-blocking conductor layer, a semiconductive water-blocking tape, an inner shield layer, an insulating layer and an outer shield layer which are sequentially arranged from inside to outside, the direct-current unit is characterized in that the water-blocking conductor layer comprises a central conductor and a plurality of annular conductor layers which are arranged outside the central conductor in a surrounding mode, the compression coefficient between every two adjacent annular conductor layers is not smaller than 0.95, the annular conductor layers are formed by splicing and surrounding a plurality of special-shaped conductors end to end, a water-blocking material is coated on the outer wall of each special-shaped conductor, an inner metal armor layer is arranged between the semiconductive PE sheath and the inner liner, and the outer.
2. The kinds of deep-sea direct-current submarine cables according to claim 1, wherein the cross-section of the special-shaped conductor is L-shaped, Z-shaped, S-shaped, T-shaped or ladder-shaped.
3. The kinds of deep-sea direct-current submarine cables according to claim 1, wherein the water-blocking material is a water-blocking paste, and the filling factor of the water-blocking paste is not less than 96%.
4. The deep ocean direct current submarine cable according to claim 1, wherein said inner metallic armor layer is wrapped with layers of metallic tapes.
5. The kinds of deep-sea direct-current submarine cables according to claim 1, wherein the filling layer is tightly bound by insulating or semi-conducting wrapping tape, the filling layer is formed by arranging or more optical cables and a plurality of round filling bars in a surrounding manner, and metal wires are placed on two sides of each optical cable.
6. The deep sea DC submarine cable according to claim 1, wherein said outer armor layer is a two-layer armor, said outer armor layer comprises a wrapped flat wire armor layer and a wrapped second flat wire armor layer, and said flat wire armor layer and said second flat wire armor layer are oppositely wound.
7. The deep-sea DC submarine cable according to claim 1, wherein said external armor layer is a triple-layered armor, and said external armor layer comprises a flat wire armor layer with wrapping, a second flat wire armor layer with wrapping, and a third flat wire armor layer with wrapping.
8. The kinds of deep-sea direct-current submarine cables according to claim 1, wherein the insulating layer is made of water tree-resistant crosslinked polyethylene, PP insulation or paper insulation.
9. The kinds of deep-sea direct-current submarine cables according to claim 1, wherein the inner liner is wrapped with layers of PP ropes.