RU193845U1 - CABLE WITH ARMOR OF STEEL ALUMINUM-ZIN COATED TAPES - Google Patents

Abstract

The utility model relates to cable technology, namely to electric armored cables intended for transmission and distribution of electrical energy. An electric cable containing insulated conductive wires, armor and sheath, while the armor is made of steel strips with aluminum-zinc coating.

Description

The technical field to which the utility model relates.

The utility model relates to cable technology, namely, to armored electric cables designed for transmission and distribution of electrical energy.

State of the art

Known armored cables with conductive conductors coated with insulation from PVC compound, armor from two steel or steel galvanized tapes and a sheath of PVC compound (product catalog LLC "Kama cable",

https://www.kamkabel.ru/production/catalog/kabeli-obshhepromyshlennye/silovye-v-PVKH-izolyatsii/silovye-v-PVKH-izolyatsii_36.html).

Signs of the known cable, which are common with the features of the claimed utility model, are that the cable contains conductive conductors coated with insulation, armor and a sheath.

Known power cables are armored, with conductive conductors coated with insulation of cross-linked polyethylene, armor of two steel or steel galvanized tapes and a sheath of polyethylene (product catalog of LLC "Kama cable",

https://www.kamkabel.ru/production/catalog/kabeli-obshhepromyshlennye/silovye-v-SPE-izolyatsii/silovye-v-SPE-izolyatsii_990.html).

Known power cables, flame retardant, armored, containing conductive conductors, coated with impregnated paper insulation, a metal sheath, an inner sheath of a halogen-free polymer composition, armor made of two steel galvanized tapes and an outer sheath made of a polymer composition, not containing halogens (patent RU 161129, published 04/10/2016, bull. No. 10).

A disadvantage of the known analogues is the use of galvanized steel tape as a cable armor. Galvanized steel armor is subject to corrosion. The presence of sulfuric and sulfate compounds, as well as chlorine compounds in the soil, air humidity, atmospheric pollution, all these factors negatively affect the galvanized steel cable armor, forming corrosion and destroying the armor. The cable eventually fails.

The technical problem lies in the need to improve the operational properties of the armored cable, namely, in the development of a power armored cable with increased corrosion resistance.

Utility Model Disclosure

The technical result is achieved by the fact that the armor of the electric cable is made of steel strips with aluminum-zinc coating.

The aluminum zinc coating is an alloy of aluminum, zinc and silicon. Aluminum in contact with oxygen oxidizes and forms a thin, but very stable oxide film, which prevents the further penetration of active substances into the thickness of the material. This film extends to the entire plane of the processed steel sheet and is the basic protective barrier to rust. Thin aluminum is reinforced with zinc. The presence of silicon increases the adhesive properties of the coating.

Distinctive features of the claimed technical solution lies in the fact that the armor of the power cable is made of steel strips with aluminum-zinc coating.

The proposed design of the electric cable is more resistant to corrosion, therefore, improves the operational properties of the power armored cable.

Utility Model Implementation

Within the claimed patent rights, the following embodiments of the utility model are possible.

The electric cable contains copper or aluminum conductive cores, each conductive core is covered with PVC compound insulation, which in turn can also be non-combustible or of low fire risk; or insulation made from cross-linked polyethylene, or insulation from a halogen-free composition, or paper impregnated insulation, or from a block copolymer of ethylene with propylene. Insulated cores can be twisted into a core, or they can be laid in parallel. A metal shield can be applied over insulated conductive cores. On top of the screen or on conductive wires, the cable contains a cushion for armor made of polymeric material. The armor is made of a winding of steel strips with aluminum-zinc coating. The outer sheath of the cable can be made of PVC compound, which in turn can also be non-combustible or of low fire risk; from polyethylene; from a halogen-free composition.

The manufacture of the cable is as follows.

Conductors are made of round or sector shape, 1 or 2 classes of flexibility in accordance with GOST 22483, from copper or aluminum wire, the strands are twisted using standard twisting equipment.

The imposition of insulation on the conductive core is carried out on an insulating machine or on an extrusion line. The twisting of the isolated conductors is carried out on a general twisting machine. A metal screen is applied on shielding machines. A pillow under the armor is extruded on an extrusion line. On the armoring machine, the armor is superimposed by winding with steel tapes with aluminum-zinc coating. An outer shell of polymer materials is applied to the extrusion line.

Claims (6)

1. An electric cable containing insulated conductive conductors, armor and a sheath, characterized in that the armor is made of steel strips with aluminum-zinc coating. 2. The cable according to claim 1, characterized in that the insulation is made of paper. 3. The cable according to claim 1, characterized in that the insulation is made of PVC compound. 4. The cable according to claim 1, characterized in that the insulation is made of silane-crosslinked polyethylene. 5. The cable according to claim 1, characterized in that the insulation is made of peroxide crosslinkable polyethylene. 6. The cable according to claim 1, characterized in that the insulation is made of a block copolymer of ethylene with propylene.