CN201673721U - Soft and mud-resistant medium and high voltage cables for ships and offshore engineering - Google Patents

Abstract

The utility model discloses a soft mud-resistant medium-high voltage cable for ships and marine engineering in the field of power cables, aiming to solve the problems that the cable cannot withstand high and low temperature, mud and corrosion. The outer circumference of the twisted soft fine copper wire conductor of the phase wire of the cable is covered with a semi-conductive conductor shielding layer, an ethylene-propylene rubber insulating layer, a semi-conducting insulating shielding layer, and a metal phase-separated shielding layer to form an insulating core. Three insulated wire cores are twisted to form a three-phase cable. The gaps between the three insulated wire cores are filled with non-hygroscopic halogen-free flame-retardant fillers. There is a halogen-free inner lining layer, and then wrapped with a polyester tape outer wrapping layer, and a metal armor layer is arranged outside the wrapping layer, and the outer sheath of the metal armor layer is extruded with a halogen-free mud-resistant polyolefin sheath. The cable can withstand low temperature, high temperature, mud and corrosion, has high strength, and can be used for development and utilization in the field of offshore energy.

Description

Soft and mud-resistant medium and high voltage cables for ships and offshore engineering

technical field

The utility model relates to a power cable, in particular to a soft mud-resistant medium-high voltage cable for ships and ocean engineering.

Background technique

Due to the particularity of the operating environment of marine engineering equipment and the use of high-power power equipment, higher and higher technical performance requirements are put forward for the matching medium and high voltage cables. The most typical requirements are soft, halogen-free, low-smoke, and Low temperature, high temperature resistance, mud resistance, corrosion resistance, in addition, it is also required to have high strength, tensile resistance, and not easy to age.

On February 10, 2010, the Chinese utility model patent with the publication number CN201402665 disclosed a medium and high voltage fire-resistant cable, aiming to provide a special medium and high-voltage fire-resistant cable with excellent electrical properties and good fire-resistant characteristics. The outside of the wire core is sequentially covered with a mica tape, a wrapping tape, a flame-retardant silicone rubber layer, a longitudinally-wrapped aluminum alloy tape and a sheath; a flame-retardant filler is arranged between the wire core and the mica tape. Although this kind of cable is superior in fire resistance, it cannot meet the performance requirements of low temperature resistance, high temperature resistance, mud resistance and corrosion resistance for cables used in ships and marine engineering.

Utility model content

In order to overcome the problems existing in the prior art, the utility model provides a soft mud-resistant medium and high-voltage cable for ships and marine engineering, which can withstand low temperature, high temperature, mud and corrosion, and has high strength.

In order to solve the above technical problems, the utility model provides a soft and mud-resistant medium and high voltage cable for ships and ocean engineering. Three insulated wire cores are twisted to form a cable, and the gaps between the three insulated wire cores are filled with non-hygroscopic halogen-free cables. Flame retardant filling material, the outer periphery of the cable is wrapped with a polyester tape inner wrapping layer, the polyester tape inner wrapping layer is extruded with a halogen-free inner lining layer, and the halogen-free inner lining layer is wrapped It is covered with a polyester tape outer wrapping layer, and the polyester tape outer wrapping layer is provided with a metal armor layer, and the metal armor layer is extruded with a halogen-free mud-resistant polyolefin outer sheath.

Compared with the prior art, the utility model has achieved the following beneficial effects: the non-hygroscopic halogen-free flame-retardant filling material has a flame-retardant effect and meets the requirements of environmental protection; Set so that when the cable is bent, the layers can slide relative to each other to avoid large internal stress; the halogen-free inner lining makes the cable have good flame retardancy; the halogen-free mud-resistant polyolefin outer sheath has Good physical and chemical properties make the cable not only elastic, but also oil-resistant, salt-resistant, and mud-resistant. The cable ages slowly and has a long service life; It can withstand certain mechanical pressure and has good shielding effect; the above structure makes the cable have the advantages of softness, small bending radius, high strength, corrosion resistance, good shielding, high temperature and low temperature resistance.

As a preferred solution of the present utility model, the insulated wire core includes a phase wire stranded soft fine copper wire conductor, and the outer periphery of the phase wire stranded soft fine copper wire conductor is covered with a semi-conductive conductor shielding layer, and the semi-conductive The conductor shielding layer is covered with an ethylene-propylene rubber insulating layer, and the ethylene-propylene rubber insulating layer is covered with a semi-conductive insulating shielding layer, and the semi-conductive insulating shielding layer is covered with a metal phase-splitting shielding layer. The ethylene-propylene rubber insulation layer is wrapped outside the semi-conductive conductor shielding layer by extrusion. The ethylene-propylene rubber has good insulation and temperature resistance. The semi-conductive conductor shielding layer can eliminate the rough surface of the phase wire twisted soft thin copper wire conductor. , to avoid the increase of the electric field intensity on the surface of the conductor; the semi-conductive insulating shielding layer makes the ethylene-propylene rubber insulating layer and the metal phase-separated shielding layer form a good contact, and prevents free discharge during the operation of the cable.

As a preferred solution of the present utility model, the metal armor layer is a braided armor layer of tinned copper wires.

As a preferred solution of the present utility model, the metal armor layer is a galvanized copper wire braided armor layer.

Description of drawings

Figure 1 is a structural schematic diagram of a soft mud-resistant medium-high voltage cable for marine engineering.

In the figure: 1 phase wire twisted soft fine copper wire conductor, 2 semi-conductive conductor shielding layer, 3 ethylene propylene rubber insulating layer, 4 semi-conducting insulating shielding layer, 5 metal phase-separated shielding layer, 6 non-hygroscopic halogen-free flame retardant Filling material, 7 polyester tape inner wrapping layer, 8 halogen-free inner lining layer, 9 polyester tape outer wrapping layer, 10 metal armor layer, 11 halogen-free mud-resistant polyolefin outer sheath.

Detailed ways

As shown in Fig. 1, the flexible and mud-resistant high-voltage cable for ships and ocean engineering of the present invention, each insulated wire core includes phase wire twisted soft thin copper wire conductor 1, phase wire twisted soft thin copper wire conductor 1 The outer periphery is covered with a semi-conductive conductor shielding layer 2, which is a high-temperature-resistant ethylene-propylene rubber shielding material, and the semi-conductive conductor shielding layer 2 is covered with a high-temperature-resistant ethylene-propylene rubber insulating layer 3, and the ethylene-propylene rubber insulation layer The layer 3 is covered with a semi-conductive insulating shielding layer 4 , and the semi-conductive insulating shielding layer 4 is covered with a metal phase-splitting shielding layer 5 . Three insulated wire cores are twisted to form a three-phase cable. The gaps between the three insulated wire cores are filled with non-hygroscopic halogen-free flame-retardant fillers 6, and the outer circumference of the cable is wrapped with a polyester tape inner wrapping layer 7. The inner wrapping layer 7 is extruded with a halogen-free inner lining layer 8, the halogen-free inner lining layer 8 is wrapped with a polyester tape outer wrapping layer 9, and the polyester tape outer wrapping layer 9 is equipped with metal armor Layer 10, the metal armor layer 10 can be a tinned copper wire braided armor layer or a galvanized copper wire braided armor layer, and the metal armor layer 10 is extruded with a halogen-free mud-resistant polyolefin outer sheath 11 .

The soft and mud-resistant medium and high voltage cables for marine engineering can be used in the development and utilization of offshore energy fields, and can meet the requirements of IEEE Std 45: 2004 standards. Ampacity.

In addition to the above embodiments, the utility model can also have other implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the utility model.

Claims (4)

1. A soft mud-resistant medium and high-voltage cable for ships and ocean engineering, characterized in that three insulated wire cores are stranded to form a cable, and the gaps between the three insulated wire cores are filled with non-hygroscopic halogen-free flame-retardant fillers. The outer circumference of the cable is wrapped with a polyester tape inner wrapping layer, and the polyester tape inner wrapping layer is extruded with a halogen-free inner lining layer, and the halogen-free inner lining layer is wrapped with a polyester tape outer wrapping layer. The polyester tape is wrapped around the cladding layer with a metal armor layer, and the metal armor layer is extruded with a halogen-free mud-resistant polyolefin outer sheath. 2. The soft and mud-resistant medium and high voltage cable for ships and marine engineering according to claim 1, wherein the insulated wire core comprises phase wires twisted soft thin copper wire conductors, and the phase wires twisted soft thin copper wires The outer circumference of the silk conductor is covered with a semi-conductive conductor shielding layer, and the semi-conductive conductor shielding layer is covered with an ethylene-propylene rubber insulating layer, and the ethylene-propylene rubber insulating layer is covered with a semi-conductive insulating shielding layer, and the semi-conductive conductor shielding layer is covered with a semi-conductive insulating shielding layer. The conductive insulating shielding layer is covered with a metal phase-splitting shielding layer. 3. The flexible, mud-resistant medium and high voltage cable for ships and ocean engineering according to claim 1 or 2, wherein the metal armor layer is a tinned copper wire braided armor layer. 4. The soft and mud-resistant medium and high voltage cable for ships and ocean engineering according to claim 1 or 2, wherein the metal armor layer is a galvanized copper wire braided armor layer.

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