CN202584877U - Low voltage power cable for ocean engineering - Google Patents

Abstract

The utility model relates to a low voltage power cable for a ship, ocean engineering and an offshore platform, and particularly relates to a low voltage power cable for ocean engineering with the rated voltage U0/U 0.6/1kV. The low voltage power cable for ocean engineering comprises conductors (1), insulating layers (2), steel wire ropes (3), protective layers (4) coated the steel wire ropes, a filler (5), an armored inner sheath (6), an armored layer (7) and an outer sheath (8). The insulating layers are coated outside the conductors to be used as core wires, a plurality of core wires and a plurality of steel wire ropes to form a cable, the filler is extruded after the cable is formed, the armored layer is coated outside, the inner wall of the armored layer is provided with the armored inner sheath, and the outer sheath is arranged outermost. The steel wire rope is a galvanized stranded steel wire rope used for an elevator. The number of the steel wire ropes is two, three or five. The low voltage power cable provided by the utility model has the advantages of high tensile strength, good weather resistance performance, good corrosion resistance performance, small size and long service life.

Description

Low-voltage power cables for marine engineering

technical field

The utility model relates to a low-voltage power cable for ships, marine engineering and offshore platforms, in particular to a low-voltage power cable for marine engineering with a rated voltage U ₀ /U of 0.6/1kV.

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.

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.

Existing low-voltage power cables for marine engineering, the rated voltage U ₀ /U of the power conductive core is 0.6/1kV, see Figure 1, generally use stranded bare copper (tin-plated) as the conductor 11, XLPE insulation or ethylene propylene Rubber is the insulating layer 12, multi-core wires (generally three cores) are cabled, and the filler 13 is extruded after the cable is formed. The filler 13 is mesh belt or filler rubber, and galvanized steel wire is wound as the armor layer 15. The inner wall of the layer 15 has an armored inner sheath 14, and the outermost layer adopts a flame-retardant polyvinyl chloride sheath, a low-smoke halogen-free polyolefin sheath or a styrene-butadiene (nitrile, chlorosulfonated polyethylene) rubber sheath as the outer sheath. Set of 16.

Existing low-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.

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 to be small in size, high in load strength, and high in environmental resistance, without weakening their functions. Install modular requirements.

Contents of the invention

The purpose of the utility model is to provide a low-voltage power cable for marine engineering, which has high tensile strength and good weather and corrosion resistance, and is small in size, light in weight and long in service life.

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

A low-voltage power cable for marine engineering, including a conductor, an insulating layer, a filler, an armored inner sheath, an armored layer, and an outer sheath, the conductor is covered with an insulating layer as a core wire, and multiple core wires are cabled and then extruded and filled The outer layer is covered with an armored layer, the inner wall of the armored layer has an armored inner sheath, and the outermost layer has an outer sheath; the cable also includes a steel wire rope and a protective layer covering the steel wire rope, and several steel wire ropes are formed into a cable with multiple core wires. Post-squeeze the filling.

The steel wire ropes are galvanized stranded elevator steel wire ropes; there are two, three or five steel wire ropes.

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

The insulating layer is vulcanized ethylene propylene rubber.

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

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

The armor layer is galvanized steel wire weaving.

The utility model adopts a built-in load-bearing steel wire rope and a galvanized steel wire braided armor layer, and the outer diameter of the existing product with the same specification is reduced by 5mm. Compared with products of the same specification, the power cable of the utility model has the advantages of small volume, light weight, low cost, high load bearing, long service life and convenient installation and maintenance under the premise of unchanged functions.

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.

Description of drawings

Fig. 1 is a schematic structural diagram of an existing low-voltage power cable for marine engineering;

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

In the figure: 1 conductor, 2 insulating layer, 3 steel wire rope, 4 protective layer, 5 filler, 6 armored inner sheath, 7 braided armor layer, 8 outer sheath; 11 conductor, 12 insulating layer, 13 filler, 14 armored inner sheath, 15 steel wire armor layers, 16 outer sheath.

Detailed ways

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

Referring to Figure 2, a low-voltage power cable for marine engineering, including a conductor 1, an insulating layer 2, a steel wire rope 3, a protective layer 4 covering the steel wire rope, a filler 5, an armored inner sheath 6, an armored layer 7 and an outer sheath set of 8;

The conductor 1 is covered with an insulating layer 2 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 2 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 to 120°C, and withstand the overload current for 4 hours in the range of -60°C to 150°C without damage. The rated voltage U ₀ /U of the cable is 0.6/1kV.

The multiple core wires are cabled with several steel wire ropes 3 and then the filler 5 is extruded. The steel wire rope 3 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 3 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 3 Extrude a layer of rubber protective layer 4 with a thickness of 0.8mm or 1.2mm before cable forming. The protective layer 4 of the present embodiment is styrene-butadiene rubber; while bearing a load of 2000 kilograms, it will not cause damage to the cable insulation layer and the non-metallic sheath layer. damage. The filler 5 is flame-retardant styrene-butadiene rubber.

The plurality of core wires and several steel wire ropes 3 are cabled to extrude the filler 5 and then covered with an armor layer 7 . The armor layer 7 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 7 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 inner wall of the armor layer 7 has an armored inner sheath 6, and the outermost layer has an outer sheath 8; the armored inner sheath 6 is flame-retardant styrene-butadiene rubber, which is the same rubber material as the filler 5, which is convenient manufacture. The outer sheath 8 is flame-retardant styrene-butadiene rubber or low-smoke halogen-free flame-retardant nitrile rubber, and the outer sheath 8 is made of different types of rubber according to the workplace. 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 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.

Claims (8)

1. A low-voltage power cable for marine engineering, including a conductor (1), an insulating layer (2), a filler (5), an armored inner sheath (6), an armored layer (7) and an outer sheath (8 ), the conductor (1) is covered with an insulating layer (2) as a core wire, and the filler (5) is extruded after multiple core wires are cabled, and the outer armor layer (7) is wrapped, and the inner wall of the armor layer (7) has an armored inner wall Sheath (6), the outermost layer has an outer sheath (8); the feature is: the cable also includes a steel wire rope (3) and a protective layer (4) covering the steel wire rope, several steel wire ropes (3) and multiple wire ropes Squeeze the filler (5) after the core wires are cabled. 2. The low-voltage power cable for marine engineering according to claim 1, characterized in that: the steel wire rope (3) is a galvanized stranded elevator steel wire rope, and the outer layer of the steel wire rope is covered with a protective layer (4). 3. The low-voltage power cable for marine engineering according to claim 1 or 2, characterized in that: there are two, three or five steel wire ropes (3). 4. The low-voltage power cable for marine engineering according to claim 1, characterized in that: the protective layer (4) of the coated steel wire rope is styrene-butadiene rubber. 5. The low-voltage power cable for marine engineering according to claim 1, characterized in that: the insulating layer (2) is vulcanized ethylene-propylene rubber. 6. The low-voltage power cable for marine engineering according to claim 1, characterized in that: the filler (5) and the armored inner sheath (6) are flame-retardant styrene-butadiene rubber. 7. The low-voltage power cable for marine engineering according to claim 1, characterized in that: the outer sheath (8) is flame-retardant styrene-butadiene rubber or low-smoke halogen-free flame-retardant nitrile rubber. 8. The low-voltage power cable for marine engineering according to claim 1, characterized in that: the armor layer (7) is braided by galvanized steel wire.

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