CN201725627U

CN201725627U - Undersea power cable

Info

Publication number: CN201725627U
Application number: CN2010201430771U
Authority: CN
Inventors: 余兆忠; 章正国; 何旭涛; 李世强; 马兴端; 龚永超; 孙晓龙
Original assignee: Zhoushan Power Authority Zhejiang Electric Power Corp
Current assignee: Zhoushan Power Authority Zhejiang Electric Power Corp
Priority date: 2010-03-29
Filing date: 2010-03-29
Publication date: 2011-01-26
Anticipated expiration: 2020-03-29

Abstract

The utility model relates to an undersea power cable, which comprises a wire core (1), a shielding layer (2), an insulating layer (3), an insulator shielding layer and inner protection layer (4), an armoring inner cushion layer (5), an armoring layer (6) and an armoring outer protection layer (7). The utility model is characterized in that the wire core (1) comprises a steel wire lead and an aluminium lead; the steel wire lead is located at the center of the wire core (1); and moreover, the steel wire lead and the aluminium lead are jointly stranded into a steel-cored aluminium strand structure to form the wire core (1). Compared with the prior art, in the utility model, the wire core comprises the steel wire lead and the aluminium lead, the steel wire lead is located at the center of the wire core, and the steel wire lead and the aluminium lead are jointly stranded into the steel-cored aluminium strand structure to form the wire core (1). The structure has the advantages that copper is replaced with aluminium, and thus, the cost is saved, and the electrical conductivity also completely meets the standard, whereas steel wire aluminium stranded mixed wire in the structure can remedy the problem that the tensile strength of the aluminium lead is insufficient, and therefore, the cable manufactured by the utility model reduces the production cost, and moreover, the electrical conductivity and the tensile strength respectively meet the specified standard.

Description

The power cable that is used for the seabed

Technical field

The utility model relates to a kind of submarine cable technical field that is used for, and especially refers to a kind of power cable that is used for the seabed.

Background technology

Existing a kind of patent No. is 200720108676.8 and is called that the Chinese utility model patent of " a kind of seabed cross-linked power cable " discloses a kind of structure, its structure comprises core, armouring inner covering, armour and the armouring outer jacket that is provided with from inside to outside, characteristics are that armour is made up of around the nonmagnetic metal silk of arranging many uniform ring, and the nonmagnetic metal silk is outside equipped with the plastics anticorrosive coat; Advantage is to substitute the zinc-coated wire sheathed structure with nonmagnetic metal silk sheathed structure both to have exempted serious eddy current, the magnetic hysteresis loss of taking the zinc-coated wire sheathed structure and producing, it is nearly 30% to make it allow ampacity to exceed than the permission ampacity of zinc-coated wire armoured cable, has guaranteed the tensile strength of seabed cross-linked power cable again; Be outside equipped with the plastics anticorrosive coat at the nonmagnetic metal silk, make nonmagnetic metal silk armoured cable place seawater for a long time and can not be corroded.But its shortcoming is it has done improvement to armour, and cost, tensile strength and the conductivity of conductor is not made improvements, so it is big to make this cable amount of copper consuming, promptly cost is higher, so its structure awaits to improve.

Summary of the invention

Technical problem to be solved in the utility model is to provide at above-mentioned prior art present situation that a kind of cost of manufacture is low, cable tensile strength reaches the qualified power cable that is used for the seabed of electric conductivity greatly.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: the power cable that originally is used for the seabed; comprise core, screen, insulating barrier, insulator screen and the sheath, armouring inner cushion layer, armour and the armouring external protection that are provided with from the inside to the outside; it is characterized in that: described core is made up of steel wire lead and aluminum conductor; described steel wire lead is positioned at the center of core, and steel wire lead and aluminum conductor are the formed core of steel reinforced aluminium conductor structure.

As improvement, described steel reinforced aluminium conductor structure is meant: some strands of steel wire leads are positioned at the center, and some strands of aluminum conductors are outside the steel wire lead and be twisted into the steel reinforced aluminium conductor conductor mutually.

As improvement, described screen comprises semi-conductor electricity band and conductor shield, and core is wrapped in the semi-conductor electricity band, and the semi-conductor electricity band is wrapped in the conductor shield.

Improve again, described insulator screen comprises that insulation screen, semiconductive water-blocking buffer layer, copper strips lapping layer, semiconductive water-blocking buffer layer are the insulator screen, and described sheath comprises plumbous cover and semiconductive polyethylene inner cushion layer, and it arranges routine position for being followed successively by insulation screen, semiconductive water-blocking buffer layer, copper strips lapping layer, semiconductive water-blocking buffer layer, plumbous cover and semiconductive polyethylene inner cushion layer from the inside to the outside.

Improve, described armouring inner cushion layer may be selected to be the pitch inner cushion layer of polypropylene rope as inner reinforcement again; And described armouring external protection is the pitch outer wrapping layer of polypropylene rope as inner reinforcement.

Improve, described armour is made up of many galvanized steel wire ropes again, and described galvanized steel wire rope is positioned at the structure of same periphery distribution with cross section and the protective layer that forms.

Improve, described armour is being provided with between galvanized steel wire rope every the magnetic aluminum-alloy wire again, and described galvanized steel wire rope is positioned on the same periphery with cross section every the magnetic aluminum-alloy wire.

As further improvement, also be provided with the optical cable layer between described armour and the armouring inner cushion layer, this optical cable layer comprises cable line, polyethylene interstitial wire and support aluminium alloy wire, described cable line, the cross section of polyethylene interstitial wire and support aluminium alloy wire is positioned on the same periphery, and the left side of per two cable lines is arranged in order and is the polyethylene interstitial wire, support aluminium alloy wire, the right of these two cable lines is arranged in order and is the polyethylene interstitial wire, support aluminium alloy wire, and per two cable lines and about each two polyethylene interstitial wire, the six roots of sensation line that the support aluminium alloy wire is formed consists of repetitive and rearranges the optical cable layer.

Compared with prior art, the utility model adopts core to be made up of steel wire lead and aluminum conductor, and described steel wire lead is positioned at the center of core, and steel wire lead and aluminum conductor are twisted into the formed core of steel reinforced aluminium conductor structure jointly.The advantage of this structure is, replaced copper by aluminium, not only provide cost savings, and the also complete conformance with standard of conductivity, and the blend of the strand of steel wire wherein aluminium, can exempt to mend the problem of aluminum conductor tensile strength deficiency again, so the cable that the utility model is made had both reduced production cost, and conductivity and tensile strength standard all up to specification.

Description of drawings

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

Fig. 2 is the structural representation of the another kind of embodiment of the utility model;

Fig. 3 is the enlarged drawing of I portion among Fig. 1;

Fig. 4 is the enlarged drawing of II portion among Fig. 1;

Fig. 5 is the amplification view of local core cross section among Fig. 1.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Embodiment one, as Fig. 1, Fig. 3, Fig. 4 and shown in Figure 5, is used for the power cable in seabed, comprises core 1, screen 2, insulating barrier 3, insulator screen and the sheath 4, armouring inner cushion layer 5, armour 6 and the armouring external protection 7 that are provided with from the inside to the outside.Armour 6 is made up of many galvanized steel wire ropes 61, and described galvanized steel wire rope 61 is positioned at the structure that same periphery distributes and the protective layer that forms with cross section.And core 1 is the mutual stranded conductor thread core that forms 1 by the blend of many aluminum conductors and the steel wire lead 11 strand aluminum conductors 11 that can increase cable tensile strength, and wherein steel wire lead 11 is positioned at the center of core 1.Screen 2 comprises semi-conductor electricity band 22 and conductor shield 21, and core 1 is wrapped in the semi-conductor electricity band 22, and semi-conductor electricity band 22 is wrapped in the conductor shield 21.And described insulator screen comprises that insulation screen 41, semiconductive water-blocking buffer layer 42, copper strips lapping layer 43, semiconductive water-blocking buffer layer 42 are the insulator screen, and described sheath 4 comprises plumbous cover 44 and semiconductive polyethylene inner cushion layer 45.It arranges routine position for being followed successively by insulation screen 41, semiconductive water-blocking buffer layer 42, copper strips lapping layer 43, semiconductive water-blocking buffer layer 42, plumbous cover 44 and semiconductive polyethylene inner cushion layer 45 from the inside to the outside.Indication armouring inner cushion layer 5 is the pitch inner cushion layer of polypropylene rope as inner reinforcement, and the armouring external protection adopts the pitch outer wrapping layer of polypropylene rope as inner reinforcement.

Embodiment two, and as shown in Figure 2, its basic structure is identical with embodiment one, and its difference is that armour 6 is being provided with every magnetic aluminum-alloy wire 9 between galvanized steel wire rope 61, and galvanized steel wire rope 61 is positioned on the same periphery with cross section every magnetic aluminum-alloy wire 9.And also be provided with optical cable layer 8 between armour 6 and the armouring inner cushion layer 5, this optical cable layer 8 comprises cable line 80, polyethylene interstitial wire 81 and support aluminium alloy wire 82, described cable line 80, the cross section of polyethylene interstitial wire 81 and support aluminium alloy wire 82 is positioned on the same periphery, and the left side of per two cable lines 80 is arranged in order and is polyethylene interstitial wire 81, support aluminium alloy wire 82, the right of these two cable lines 80 is arranged in order and is polyethylene interstitial wire 81, support aluminium alloy wire 82, and per two cable lines 80 and about each two polyethylene interstitial wire 81, the six roots of sensation line that support aluminium alloy wire 82 is formed consists of repetitive and rearranges optical cable layer 8.

Claims

1. power cable that is used for the seabed; comprise core (1), screen (2), insulating barrier (3), insulator screen and the sheath (4), armouring inner cushion layer (5), armour (6) and the armouring external protection (7) that are provided with from the inside to the outside; it is characterized in that: described core (1) is made up of steel wire lead and aluminum conductor; described steel wire lead is positioned at the center of core (1), and steel wire lead and aluminum conductor are the formed core of steel reinforced aluminium conductor structure (1).

2. according to the described power cable that is used for the seabed of claim 1, it is characterized in that: described steel reinforced aluminium conductor structure is meant: some strands of steel wire leads are positioned at the center, and some strands of aluminum conductors are outside the steel wire lead and be twisted into the steel reinforced aluminium conductor conductor mutually.

3. according to the described power cable that is used for the seabed of claim 1, it is characterized in that: described screen (2) comprises semi-conductor electricity band (22) and conductor shield (21), core (1) is wrapped in the semi-conductor electricity band (22), and semi-conductor electricity band (22) is wrapped in the conductor shield (21).

4. according to the described power cable that is used for the seabed of claim 1, it is characterized in that: described insulator screen comprises insulation screen (41), semiconductive water-blocking buffer layer (42), copper strips lapping layer (43), semiconductive water-blocking buffer layer (42) is the insulator screen, and described sheath (4) comprises plumbous cover (44) and semiconductive polyethylene inner cushion layer (45), and it arranges routine position for being followed successively by insulation screen (41) from the inside to the outside, semiconductive water-blocking buffer layer (42), copper strips lapping layer (43), semiconductive water-blocking buffer layer (42), plumbous cover (44) and semiconductive polyethylene inner cushion layer (45).

5. according to the described power cable that is used for the seabed of claim 1, it is characterized in that: described armouring inner cushion layer (5) is the pitch inner cushion layer of polypropylene rope as inner reinforcement.

6. according to the described power cable that is used for the seabed of claim 1, it is characterized in that: described armouring external protection is the pitch outer wrapping layer of polypropylene rope as inner reinforcement.

7. according to the described power cable that is used for the seabed of arbitrary claim in the claim 1 to 6; it is characterized in that: described armour (6) is made up of many galvanized steel wire ropes (61), and described galvanized steel wire rope (61) is positioned at the structure that same periphery distributes and the protective layer that forms with cross section.

8. according to the described power cable that is used for the seabed of claim 7, it is characterized in that: described armour (6) is provided with between the galvanized steel wire rope (61) every magnetic aluminum-alloy wire (9) being positioned at, and described galvanized steel wire rope (61) is positioned on the same periphery with cross section every magnetic aluminum-alloy wire (9).

9. according to the described power cable that is used for the seabed of claim 7, it is characterized in that: also be provided with optical cable layer (8) between described armour (6) and the armouring inner cushion layer (5), this optical cable layer (8) comprises cable line (80), polyethylene interstitial wire (81) and support aluminium alloy wire (82), described cable line (80), the cross section of polyethylene interstitial wire (81) and support aluminium alloy wire (82) is positioned on the same periphery, and the left side of per two cable lines (80) is arranged in order and is polyethylene interstitial wire (81), support aluminium alloy wire (82), the right of these two cable lines (80) is arranged in order and is polyethylene interstitial wire (81), support aluminium alloy wire (82), and per two cable lines (80) and about each two polyethylene interstitial wire (81), the six roots of sensation line that support aluminium alloy wire (82) is formed consists of repetitive and rearranges optical cable layer (8).