RU187487U1 - High-voltage flexible power cable - Google Patents

Abstract

The utility model relates to cable technology, in particular to a power flexible high-voltage cable for connecting excavators and other mobile machines, mechanisms and equipment during underground and opencast mining. The main conductors, auxiliary conductors and earth conductors are twisted around a central core made of high-strength filaments with tensile strength of at least 150 kgf. The outer shell is made of a polymeric material having a tensile strength of at least 40 MPa, elongation at break of at least 600% and abrasion of at least 40 mm ³ . The technical result is to increase the operational reliability and service life of the cable. 3 s.p. crystals, 2 ill., 1 tab.

Description

The utility model relates to cable technology, in particular to a flexible power cable for connecting excavators and other mobile machines, mechanisms and equipment during underground and opencast mining.

Technical level

A high-voltage mine power cable is known (Patent RU No. 156465 publ. 10.11.2015), which consists of three main copper conductive cores, each of which is coated with rubber insulation, located between the internal and external conductive rubber screens, twisted with uninsulated ground wire, and a two-layer rubber sheath over twisted cores. The inner layer of the two-layer shell is made of rubber based on nitrile butadiene rubber with an acrylonitrile content of 31 to 35%, and the outer layer is made of rubber based on nitrile butadiene rubber filled with polyvinyl chloride.

Known power high-voltage flexible cable (Patent RU No. 161666 publ. 04/27/2016), which contains three main copper conductors, each of which is coated with rubber insulation with two. conductive rubber screens for core and insulation, an uninsulated ground conductor and an insulated auxiliary conductor, and a two-layer rubber sheath is applied over twisted main conductive conductors, auxiliary conductor and ground conductor. The outer layer of the two-layer shell is made of rubber based on polyisoprene and polybutadiene rubbers, the inner layer of the shell is made of rubber based on oil-filled butadiene-methylstyrene rubber with polybutadiene rubber, and the insulation of the auxiliary core is made of rubber based on ethylene-propylene rubber.

The main disadvantage of existing cables is that during operation in coal and other opencast mines, frequent damage to the cable occurs when dragging it over the rock (cuts, abrasion of the sheath) and when running over the cable of mining equipment.

Utility Model Essence

This utility model solves the problem of creating a cable with improved physical and mechanical properties. This increases the operational reliability and service life of the cable.

To solve this problem and achieve the specified technical result, a present invention proposes a cable comprising three insulated main conductive conductors, an auxiliary core and ground conductors, on top of which an outer sheath is applied.

The feature of the cable according to this utility model is that in the inventive cable, the main conductors, auxiliary conductors and ground conductors are twisted around a central core made of high-strength filaments with a breaking strength of at least 150 kgf, and the outer sheath is made of a polymer material having a limit tensile strength of at least 40 MPa, elongation at break of at least 600%, tear resistance of at least 50 kN / m and abrasion of at least 40 mm ³ .

The outer shell can be made of two layers, the outer layer of the outer shell can be made of bright bright polymer material or the outer layer of the outer shell is transparent and reflective elements are located between the layers.

Brief Description of the Drawings

In FIG. 1 is a sectional view of a cable; FIG. 2 shows a cable with reflective elements along the sheath. The table shows the main characteristics of the proposed cable for voltage of 6 and 10 kV.

Utility Model Implementation

A flexible high-voltage power cable of a symmetrical design includes the main cores of copper wires 1 with heat-resistant insulation, the auxiliary cores 2 and grounding cores 3 located in the gaps between the main cores 1. The central core 4 is made of high-strength threads. As high-strength threads, a CBM thread can be used. The outer shell 5 is made of a polymeric material with a tensile strength of at least 40 MPa, with an elongation at break of at least 600%, with a tear resistance of at least 50 kN / m, and an abrasion of at least 40 mm ³ .

The outer shell 5 can be made two-layer, the outer layer 6 of which is made transparent, and between the inner and outer layers of the outer shell 5 is a reflective tape 7.

The design of the claimed utility model has been successfully tested in the production environment.

Claims (4)

1. High-voltage flexible power cable, comprising three main insulated conductive conductors, an auxiliary conductor and ground conductors, on top of which an outer sheath is applied, characterized in that the main conductive conductors, auxiliary conductor and ground conductor are twisted around a central core made of high-strength tensile threads strength not less than 150 kgf, and the outer shell is made of a polymer material with improved physical and mechanical properties, namely it has a tensile strength and not less than 40 MPa, elongation at break of not less than 600%, tear strength of at least 50 kN / m and abrasion at least 40 mm ^3. 2. High-voltage flexible power cable according to claim 1, characterized in that the outer sheath is double-layer. 3. High-voltage flexible power cable according to claim 1, characterized in that the outer layer of the outer sheath is made of a bright light colored polymeric material. 4. High-voltage flexible power cable according to claim 2, characterized in that the outer layer of the outer sheath is transparent and reflective elements are located between the layers of the two-layer sheath.

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