CN203118637U

CN203118637U - Submarine alternating current power cable

Info

Publication number: CN203118637U
Application number: CN 201320153413
Authority: CN
Inventors: 宣耀伟; 汪洋; 章正国; 何旭涛; 郑新龙; 敬强; 张志刚
Original assignee: Zhoushan Power Authority Zhejiang Electric Power Corp; State Grid Corp of China SGCC
Current assignee: Zhoushan Power Authority Zhejiang Electric Power Corp; State Grid Corp of China SGCC
Priority date: 2013-03-29
Filing date: 2013-03-29
Publication date: 2013-08-07
Anticipated expiration: 2023-03-29

Abstract

The utility model discloses a submarine alternating current power cable, which relates to a cable. An existing cable is large in copper consumption and high in cost. The submarine alternating current power cable is characterized by comprising a cable core, a shielding layer, an insulation layer, an insulation body shielding layer, an inner protection layer, an armored inner cushion layer, an armored layer and an armored outer protection layer which are arranged from inner to outer, wherein the shielding layer comprises a semiconductor electric belt and a conductor shielding layer, the cable core is packed in the semiconductor electric belt, the semiconductor electric belt is packed in the conductor shielding layer, and the cable core is a conductor which is stranded by aluminum alloy conductors. The cable core uses aluminum alloy to replace the copper, aluminum alloy wires have enough strength of extension, and do not have hysteresis losses and eddy-current losses under the action of alternating current voltage, and the submarine alternating current power cable is excellent in techno-economic effectiveness and high in energy-saving benefits, can guarantee electrical conductivity and tensile strength, and reduces production cost at the same time.

Description

A kind of subsea AC power cable

Technical field

The utility model relates to a kind of cable.

Background technology

Existing a kind of patent No. is 200720108676.8 and is called that the Chinese invention 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 arranges 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 it is big to make this cable amount of copper consuming, and cost is higher, so its structure awaits to improve.

The utility model content

The technical assignment of the technical problems to be solved in the utility model and proposition is that the prior art scheme is improved and improved, and a kind of subsea AC power cable is provided, and is low and improve the purpose of tensile strength to reach cost.For this reason, the utility model is taked following technical scheme.

A kind of subsea AC power cable is characterized in that: comprise the core, screen, insulating barrier, insulator screen, sheath, armouring inner cushion layer, armour, the armouring external protection that arrange from the inside to the outside; Described screen comprises semi-conductor electricity band, conductor shield, and core is wrapped in the semi-conductor electricity band, and the semi-conductor electricity band is wrapped in the conductor shield, and described core is by the stranded conductor of aluminium alloy conductor.Core is replaced copper by aluminium alloy, and aluminium alloy conductor tensile strength is enough, and lead does not exist magnetic hysteresis loss and eddy current loss under the alternating voltage effect, and techno-economic effect is good, and the energy-saving efficiency height when guaranteeing conductivity and tensile strength, reduces production costs.Aluminium alloy wire can be middle strength aluminium alloy line SI-26(AAAC line); The semi-conductor electricity band is as the screen of the additional one deck semiconductive material of conductive surface, and it is used for even conductor outer surface electric field, avoids the air gap of and core stranded generation rough because of conductive surface to cause conductor and insulation that partial discharge takes place.Conductor shield utilizes that copper strips is wrapped to form, and passes through capacitance current when normal operation; When system is short-circuited, as the passage of short circuit current, also play the effect of electric field shielding simultaneously.

As the further of technique scheme improved and replenish, the utility model also comprises following additional technical feature.

Described armour comprises the inner armor layer and is located at the armoured layer of inner armor layer periphery.Adopt inside and outside two-layer armour, improved mechanical strength.

Described armouring inner cushion layer is that described armouring external protection is layer of polyurethane with the pitch outer wrapping layer of polypropylene rope as inner reinforcement.

Described inner armor layer is made up of the stranded aluminum-alloy wire of short pitch single line; Described armoured layer is made up of many zinc-coated wires of circumferentially evenly arranging or zinc-coated wire and aluminum-alloy wire.Outer aluminum-alloy wire is used for every magnetic.

Described zinc-coated wire, aluminum-alloy wire are spaced.

Described insulator screen and sheath comprise insulation screen, semiconductive water-blocking buffer layer, copper strips lapping layer, semiconductive water-blocking buffer layer, plumbous cover, semiconductive polyethylene liner layer, and described insulation screen, semiconductive water-blocking buffer layer, copper strips lapping layer, semiconductive water-blocking buffer layer, plumbous cover, semiconductive polyethylene liner layer are arranged in order from the inside to the outside.Insulation screen contacts fine with the insulating barrier outer surface, and with the metallic sheath equipotential, avoid because of defectives and metallic sheath generation partial discharge such as cable insulation face cracks.The semiconductive water-blocking buffer layer has the advantages that moisture absorption is strong, expansion rate is big, expansion rate is fast, resistance is little, can effectively cushion, the electric field strength that weakens, and has constituted vertical stop water of the complete excellence in insulation shield surface.

Described armour is provided with the light unit.Be provided with the light unit for communication in the armour, realized that sea electric power cable both can electric energy transmitting, the function that can carry out digital communication again; By checkout equipment, the light unit further is monitored temperature, the stress of cable, improves reliability of operation and fail safe.

Described smooth unit comprises cable line, polyethylene interstitial wire, and the cross section of described cable line, polyethylene interstitial wire is positioned on the same periphery; Polyethylene interstitial wire, cable line, polyethylene interstitial wire circumferential array are successively formed minimum light unit, the circumferential repeated arrangement in minimum light unit.Described polyethylene interstitial wire is mainly used in bearing pressure, the protection cable line.

Armour is provided with two groups of relative minimum light unit, is aluminum-alloy wire on all the other peripheries.

Beneficial effect:

1, core is replaced copper by aluminium alloy, and aluminium alloy conductor tensile strength is enough, and lead is under the alternating current effect, do not have magnetic hysteresis loss and eddy current loss, techno-economic effect is good, the energy-saving efficiency height, when guaranteeing conductivity and tensile strength, reduce production costs.

2, the double armor formed of outer (or zinc-coated wire and the aluminum-alloy wire evenly distributed) armour of circumferentially evenly being arranged by outer many of the stranded inner armor layer of the outer short pitch single line of inner cushion layer and inner armor layer, the stranded armoured layer of aluminum-alloy wire of its short pitch single line can significantly improve the compressive property of cable, and makes its bending stiffness less than the armouring of meropodium distance; Can prevent the exterior injury that rock, falling object and haulage gear bring preferably like this.

3, the armouring external protection is layer of polyurethane, improves the anti-wear performance of armouring outer jacket, prolong cable useful life, and antiseptic property also meets standard fully.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the A portion enlarged drawing of Fig. 1.

Fig. 3 is the B portion enlarged drawing of Fig. 1.

Fig. 4 is second kind of structural representation of the utility model.

Fig. 5 is the third structural representation of the utility model.

Among the figure: the 1-core; The 2-screen; 21-semi-conductor electricity band; The 22-conductor shield; The 3-insulating barrier; The 4-sheath; The 41-insulation screen; 42-semiconductive water-blocking buffer layer; 43-copper strips lapping layer; The plumbous cover of 44-; 45-semiconductive polyethylene liner layer; 5-armouring inner cushion layer; The 6-armour; 60-inner armor layer; The armoured layer of 61-; The 62-aluminum-alloy wire; The 63-zinc-coated wire; 7-armouring external protection; The 80-cable line; 81-polyethylene interstitial wire.

Embodiment

Below in conjunction with Figure of description the technical solution of the utility model is described in further detail.

Embodiment one:

As shown in Figure 1, 2, 3, the utility model comprises core 1, screen 2, insulating barrier 3, insulator screen and sheath 4, armouring inner cushion layer 5, armour 6, the armouring external protection 7 that arranges from the inside to the outside.Screen 2 comprises semi-conductor electricity band 21, conductor shield 22, and core 1 is wrapped in the semi-conductor electricity band 21, and semi-conductor electricity band 21 is wrapped in the conductor shield 22.Wherein, core 1 is by the stranded conductor that forms of aluminium alloy conductor.Armouring inner cushion layer 5 is with the pitch outer wrapping layer of polypropylene rope as inner reinforcement, and for improving resistance to wear, armouring external protection 7 is layer of polyurethane.

Embodiment two:

As shown in Figure 4, be with embodiment one difference: for improving intensity, armour 6 is made up of inner armor layer 60 and armoured layer 61; Inner armor layer 60 is the outer stranded aluminum-alloy wire armour of short pitch single line of inner cushion layer, the armour that armoured layer 60 is formed for the many zinc-coated wires of circumferentially evenly arranging 63 that are positioned at armoured layer 61, perhaps armoured layer 61 is many zinc-coated wires 63 of circumferentially evenly arranging and at least one armour that aluminum-alloy wire 62 is formed, and zinc-coated wire 63, aluminum-alloy wire 62 are spaced.The insulator screen comprises insulation screen 41, semiconductive water-blocking buffer layer 42, copper strips lapping layer 43, semiconductive water-blocking buffer layer 42; Sheath comprises plumbous cover 44, semiconductive polyethylene liner layer 45, and insulation screen 41, semiconductive water-blocking buffer layer 42, copper strips lapping layer 43, semiconductive water-blocking buffer layer 42, plumbous cover 44, semiconductive polyethylene liner layer 45 are arranged in order from the inside to the outside.

Embodiment three,

As shown in Figure 5, be to be provided with in the armour 6 the light unit with embodiment one difference; The light unit comprises cable line 80, polyethylene interstitial wire 81, and the cross section of cable line 80, polyethylene interstitial wire 81 is positioned on the same periphery; Polyethylene interstitial wire 81, cable line 80, polyethylene interstitial wire 81 circumferential array are successively formed the minimum light unit, and the circumferential repeated arrangement in minimum light unit in the present embodiment, is provided with two groups of minimum light unit, and all the other are aluminum-alloy wire 62.Certainly, the light unit also can be located in the inner armor layer 60 among the embodiment two.

A kind of subsea AC power cable shown in above Fig. 1-5 is specific embodiment of the utility model; the utility model substantive distinguishing features and progress have been embodied; can be according to the use needs of reality; under enlightenment of the present utility model; it is carried out the equivalent modifications of aspects such as shape, structure, all at the row of the protection range of this programme.

Claims

1. a subsea AC power cable is characterized in that: comprise core (1), screen (2), insulating barrier (3), insulator screen and the sheath (4), armouring inner cushion layer (5), armour (6), the armouring external protection (7) that arrange from the inside to the outside; Described screen (2) comprises semi-conductor electricity band (21), conductor shield (22), and core (1) is wrapped in the semi-conductor electricity band (21), and semi-conductor electricity band (21) is wrapped in the conductor shield (22); Described core (1) is by the stranded conductor of aluminium alloy conductor.

2. a kind of subsea AC power cable according to claim 1 is characterized in that: described armour (6) comprises inner armor layer (60) and is located at the armoured layer (61) of inner armor layer (60) periphery.

3. a kind of subsea AC power cable according to claim 1, it is characterized in that: described armouring external protection (7) is layer of polyurethane, and described armouring inner cushion layer (5) is with the pitch outer wrapping layer of polypropylene rope as inner reinforcement.

4. a kind of subsea AC power cable according to claim 2, it is characterized in that: described inner armor layer (60) is made up of the stranded aluminum-alloy wire of short pitch single line (60); Described armoured layer (61) is made up of many zinc-coated wires (63) of circumferentially evenly arranging.

5. a kind of subsea AC power cable according to claim 2 is characterized in that: described inner armor layer (60) is made up of the outer stranded aluminum-alloy wire of short pitch single line of inner cushion layer; Described armoured layer (61) is made up of many outer zinc-coated wire (63) and aluminum-alloy wires (62) of circumferentially evenly arranging of inner cushion layer.

6. a kind of subsea AC power cable according to claim 5, it is characterized in that: described zinc-coated wire (63), aluminum-alloy wire (62) are spaced.

7. a kind of subsea AC power cable according to claim 1, it is characterized in that: described insulator screen and sheath comprise insulation screen (41), semiconductive water-blocking buffer layer (42), copper strips lapping layer (43), semiconductive water-blocking buffer layer (42), plumbous cover (44), semiconductive polyethylene liner layer (45), described insulation screen (41), semiconductive water-blocking buffer layer (42), copper strips lapping layer (43), semiconductive water-blocking buffer layer (42), plumbous cover (44), semiconductive polyethylene liner layer (45) is arranged in order from the inside to the outside.

8. according to the described a kind of subsea AC power cable of the arbitrary claim of claim 1-7, it is characterized in that: be provided with the light unit for communication in the described armour (6).

9. described a kind of subsea AC power cable according to Claim 8, it is characterized in that: described smooth unit comprises cable line (80), polyethylene interstitial wire (81), and the cross section of described cable line (80), polyethylene interstitial wire (81) is positioned on the same periphery; Polyethylene interstitial wire (81), cable line (80), polyethylene interstitial wire (81) circumferential array are successively formed minimum light unit, the circumferential repeated arrangement in minimum light unit.

10. a kind of subsea AC power cable according to claim 9, it is characterized in that: being provided with two groups of relative minimum light unit in the armour, is aluminum-alloy wire (63) on all the other peripheries.