CN202549469U - Medium-high voltage power cable used for ocean engineering - Google Patents

Abstract

The utility model relates to a medium-high voltage power cable for ships, marine engineering and offshore platforms, in particular to a medium-high voltage power cable for marine engineering with a rated voltage U ₀ /U of 3.6/6kV or more. A medium and high voltage power cable for marine engineering, the conductor (1) is covered with an insulating layer (3) as a core wire, and the inner and outer walls of the insulating layer are covered with a semi-conductive insulating inner shielding layer (2) and an outer shielding layer (4) , the semi-conductive insulating outer shielding layer is also coated with a copper tape phase-separated metal shielding layer (5), a plurality of core wires are cabled, and the filler (6) is extruded after cabled, the outer armor layer (8), the armored There is an armored inner sheath (7) on the inner wall of the coating layer, and an outer sheath (11) on the outermost layer; the cable also includes a steel wire rope (9) and a protective layer (10) covering the steel wire rope, several steel wire ropes and multiple wire ropes The filler is extruded after the core wire is cabled. The steel wire ropes are galvanized stranded elevator steel wire ropes, and the number of steel wire ropes is two, three or five.

Description

Medium and high voltage power cables for marine engineering

technical field

The utility model relates to a medium-high voltage power cable for ships, marine engineering and offshore platforms, in particular to a medium-high voltage power cable for marine engineering with a rated voltage U ₀ /U of 3.6/6kV or more.

Background technique

Existing ships, marine engineering and offshore platform power systems and monitoring systems generally use mutually independent cable systems. In marine, offshore platform and submarine engineering projects represented by marine engineering, there are problems such as high cost and difficulty in cable laying. Laying cables independently not only takes up expensive equipment space, but also laying cables repeatedly will easily cause damage to the previous cables, increasing the difficulty of laying. the

In the design of power cables for marine engineering, specific factors such as high humidity and salinity in the marine environment, large changes in temperature and water pressure, dense electromagnetic interference of metal components on the hull and submarine equipment, extremely complex electromagnetic interference, and high laying and maintenance costs should be fully considered. Although the existing special power cables for marine engineering have met the needs of marine equipment and engineering to a certain extent, there are still problems such as difficult cable installation, excessive space occupation, and insufficient product reliability. the

In the existing medium and high voltage power cables for marine engineering, the rated voltage U ₀ /U of the power conductive core is above 3.6/6kV to 26/35kV. The structure is shown in Figure 1, and stranded bare copper (tin-plated) is generally used as the conductor 21 , cross-linked polyethylene insulation or ethylene-propylene rubber is the insulating layer 23, and the semi-conductive insulating inner shielding layer 22 and the outer shielding layer 24 are coated on the inner and outer walls of the insulating layer 23, and the semi-conductive insulating outer shielding layer 24 is also coated Copper tape phase-separated metal shielding layer 25, multi-core wires (generally three cores) are cabled, and fillers 26 are extruded after cabled. The fillers 26 are mesh belts or fillers, and galvanized steel wires are wound as armor layers 28. There is an armored inner sheath 27 on the inner wall of the armored layer 28, and the outermost layer is made of flame-retardant polyvinyl chloride sheath, low-smoke halogen-free polyolefin sheath or styrene-butadiene (nitrile, chlorosulfonated polyethylene) rubber sheath As outer sheath 29.

Existing medium and high voltage power cables for marine engineering use copper wire or steel wire braiding layer and steel wire wrapping armor layer as the mechanical protection layer and load-bearing layer. The structure of the wire braided layer is relatively stable, but it cannot withstand excessive loads, and it is difficult to withstand a load of more than 100 kilograms. Steel wire wrapping armor has a strong load-bearing capacity, but its structural stability is poor, it is easy to detach, and it is easy to cause damage such as tearing to the non-metallic sheath. Once the metal wire comes into contact with seawater or oil, the metal wire will corrode and break quickly. the

In order to promote the overall performance improvement of submarine engineering, offshore platforms and ships, the cable products, which are indispensable as power systems, are proposed with miniaturization, high load strength and high environmental resistance under the premise of ensuring that the functions are not weakened. Require. the

Contents of the invention

The purpose of the utility model is to provide a medium and high voltage power cable for ocean engineering, which has high tensile strength and good weather and corrosion resistance, and has a small volume and long service life. the

In order to realize the above utility model purpose, the utility model adopts the following technical solutions:

A medium and high voltage power cable for marine engineering, including a conductor, an insulating layer, a semiconducting insulating inner shielding layer, a semiconducting insulating outer shielding layer, a copper tape phase-separated metal shielding layer, a filler, an armored inner sheath, and an armoring layer And the outer sheath, the conductor is covered with an insulating layer as a core wire, and the inner and outer walls of the insulating layer are covered with a semi-conductive insulating inner shielding layer and an outer shielding layer, and a copper tape phase-separated metal shielding is also wrapped outside the semi-conductive insulating outer shielding layer Layer, a plurality of core wires are cabled, the filler is extruded after cable forming, and the outer armor layer is covered with an armored inner sheath on the inner wall of the armored layer, and an outer sheath on the outermost layer; the cable also includes a steel wire rope and a sheath The protective layer of the steel wire rope, after several steel wire ropes and multiple core wires are cabled, the filler is extruded.

The steel wire rope is a galvanized stranded elevator steel wire rope. the

There are two, three or five steel wire ropes. the

The protective layer of the coated steel wire rope is styrene-butadiene rubber. the

The insulating layer is vulcanized ethylene propylene rubber. the

The filler and armored inner sheath are flame-retardant styrene-butadiene rubber. the

The outer sheath is flame-retardant styrene-butadiene rubber or low-smoke halogen-free flame-retardant nitrile rubber. the

The armor layer is galvanized steel wire weaving. the

The utility model adopts the built-in load-bearing steel wire rope and the braided armor layer of galvanized steel wire, which is 5mm lower in outer diameter than the existing products of the same specification. Compared with the products of the same specification, the power cable of the utility model has small volume and Light weight, low cost, high load bearing, long service life, easy installation and maintenance. the

The utility model has high tensile strength, can carry out power distribution tasks of subsea projects such as 6000-meter-deep subsea tunnels, subsea mineral exploration, mining, etc., and also has excellent weather resistance and corrosion resistance, and can meet the needs of subsea projects, oil platforms and It can be used in marine engineering, shipbuilding and other machinery and equipment manufacturing, and power system fields to meet the work requirements of different occasions such as ships crossing the ocean and polar regions. the

Description of drawings

Figure 1 is a structural schematic diagram of the existing medium and high voltage power cables for marine engineering;

Fig. 2 is a structural schematic diagram of a medium-high voltage power cable for marine engineering of the present invention.

In Figure 2: 1 conductor, 2 semi-conductive insulating inner shield, 3 insulating layer, 4 semi-conductive insulating outer shield, 5 copper tape phase-separated metal shield, 6 filler, 7 armored inner sheath, 8 armored layers, 9 steel wire ropes, 10 protective layers, 11 outer sheaths;

In Figure 1: 21 conductor, 22 semi-conductive insulating inner shielding layer, 23 insulating layer, 24 semi-conducting insulating outer shielding layer, 25 copper tape phase-separated metal shielding layer, 26 filler, 27 armored inner sheath, 28 armored layer, 29 outer sheath.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described. the

Referring to Fig. 2, a medium and high voltage power cable for marine engineering, including a conductor 1, an insulating layer 3, a semiconducting insulating inner shielding layer 2, a semiconducting insulating outer shielding layer 4, a copper tape phase-separated metal shielding layer 5, and a filler 6 , steel wire rope 9, protective layer 10 covering steel wire rope, armored inner sheath 7, armored layer 8 and outer sheath 11;

The conductor 1 is covered with an insulating layer 3 as a core wire. The conductor 1 adopts tinned copper wire, which is a tinned annealed copper stranded conductor, and the conductor has good metal compatibility and corrosion resistance, which prolongs the service life of the product. The insulating layer 3 is vulcanized ethylene-propylene rubber, and the vulcanized ethylene-propylene rubber insulating layer has the characteristics of weather resistance, ozone resistance, heat resistance, acid and alkali resistance, water vapor resistance, color stability, electrical properties, oil filling and room temperature fluidity. Features, can improve product flexibility, easy to install. Good insulation performance improves cable withstand voltage level and corrosion resistance. It can make the product work normally in the range of -30°C ~ 120°C, and withstand the overload current for 4 hours in the range of -60°C ~ 150°C without damage. The rated voltage U ₀ /U of the cable is 3.6/6kV, 6/6kV, 6/10kV, 8.7/10kV, 8.7/15kV, 12/20kV, 18/30kV, 21/35kV, 26/35kV.

The inner and outer walls of the insulating layer 3 are coated with a semiconductive insulating inner shielding layer 2 and an outer shielding layer 4 , and a copper tape phase-separated metal shielding layer 5 is also coated outside the semiconducting insulating outer shielding layer 4 . the

The plurality of core wires are cabled with several steel wire ropes 9 and then the filler 6 is extruded, and the core wires are generally three cores. The steel wire rope 9 is a steel wire rope for a galvanized twisted elevator, which is used as a load-bearing cable and is flexible; the steel wire rope 9 is two, three or five, which can be determined according to the laying length and unit length weight of each of the cables; the steel wire rope 9 Extrude a layer of rubber protective layer 10 with a thickness of 0.8mm or 1.2mm before cabling. The protective layer 10 of this embodiment is styrene-butadiene rubber; Layer, non-metallic sheath layer damage. The filler 6 is flame-retardant styrene-butadiene rubber. the

The plurality of core wires and several steel wire ropes 9 are cabled, and then the filler 6 is extruded, and then the armor layer 8 is wrapped. The armor layer 8 is braided by galvanized steel wires with diameters of 0.4 mm and 0.45 mm as the outer metal armor layer, which has good structural stability, high mechanical protection capacity and load-bearing capacity. The galvanized steel wire braided armor layer has a weaving density > 80%, and the armor layer is smooth and flat without burrs and messy wires, ensuring that the product has good mechanical damage resistance, corrosion resistance and stable structure. When the cable is damaged by heavy impact, collision, etc., or when it is bitten by fish, it can ensure the normal operation of the cable. the

The inner wall of the armor layer 8 has an armored inner sheath 7, and the outermost layer has an outer sheath 11; the armored inner sheath 7 is flame-retardant styrene-butadiene rubber, which is made of the same rubber material as the filler 6, which is convenient manufacture. The outer sheath 11 is flame-retardant styrene-butadiene rubber or low-smoke halogen-free flame-retardant nitrile rubber, and the outer sheath 11 uses different types of rubber according to the working situation. The outermost non-metallic sheath of power cables in ships and offshore platform buildings is made of low-smoke, halogen-free, flame-retardant vulcanized nitrile rubber; the outermost non-metallic sheath of power cables in contact with seawater, mud, oil and other media is made of water-resistant Vulcanized styrene-butadiene rubber with good cold resistance, oil resistance, acid and alkali resistance. the

The above are only preferred embodiments of the present utility model, and are not used to limit the scope of protection of the present utility model. Therefore, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be Included within the protection scope of the present utility model. the

Claims (8)

1. an ocean engineering is used the mesohigh power cable; Comprise conductor (1), insulating barrier (3), semiconductive insulation internal shield (2), semiconductive insulation outer shielding layer (4), copper strips phase-splitting metal screen layer (5), filler (6), armouring inner sheath (7), armour (8) and oversheath (11); Conductor (1) outsourcing insulation (3) is as heart yearn; On insulating barrier (3) inner and outer wall, coat semiconductive insulation internal shield (2) and outer shielding layer (4), outside semiconductive insulation outer shielding layer (4), go back cladding copper strip phase-splitting metal screen layer (5), many heart yearn strandings; Extrusion packing thing (6) behind the stranding; Outsourcing armour (8), armour (8) inwall has armouring inner sheath (7), and outermost layer has oversheath (11); It is characterized in that: said cable also comprises the overcoat (10) of steel wire rope (9) and coated cable (9), extrusion packing thing (6) behind some steel wire ropes (9) and the many heart yearn strandings.

2. ocean engineering according to claim 1 is used the mesohigh power cable, it is characterized in that: said steel wire rope (9) is used steel wire rope for zinc-plated stranded elevator.

3. ocean engineering according to claim 1 and 2 is used the mesohigh power cable, it is characterized in that: said steel wire rope (9) is two, three or five.

4. ocean engineering according to claim 1 is used the mesohigh power cable, it is characterized in that: the overcoat of said coated cable (10) is a butadiene-styrene rubber.

5. ocean engineering according to claim 1 is used the mesohigh power cable, it is characterized in that: said insulating barrier (3) is sulfuration ethylene-propylene rubber.

6. ocean engineering according to claim 1 is used the mesohigh power cable, it is characterized in that: said filler (6) and armouring inner sheath (7) are fire-retardant butadiene-styrene rubber.

7. ocean engineering according to claim 1 is used the mesohigh power cable, it is characterized in that: said oversheath (11) is fire-retardant butadiene-styrene rubber or low-smoke non-halogen flame-retardant acrylonitrile-butadiene rubber.

8. ocean engineering according to claim 1 is used the mesohigh power cable, it is characterized in that: said armour (8) is the zinc-coated wire braiding.

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