RU69675U1 - MINING CABLE - Google Patents

Abstract

The utility model relates to the cable industry of the electrical industry and can be used for the needs of the national economy.

The developed cable is designed for connecting mine mobile machines and mechanisms to electric networks.

The main advantages of a mine cable with a sheath made of thermoplastic elastomer are:

- increased physical and mechanical properties (tensile strength and elongation);

- increased resistance to abrasion;

- reduced dimensions and weight of the cable;

- a wider range of operating ambient temperature;

- ozone resistance;

- increased service life;

- ergonomic cable (easy introduction of dyes into the shell);

- simplified manufacturing technology;

- the possibility of introducing elements from non-high-temperature materials into the cable structure (since there is no heating of the structural elements during sheathing).

Description

The utility model relates to the cable industry of the electrical industry and can be used for the needs of the national economy.

A flexible cable with copper conductors with rubber insulation, electrically conductive elastic shields, in a rubber sheath, a mine cable according to TU 16.K73.012-95, can be considered an analog of development.

The developed shaft flexible cable with copper conductors, rubber insulation and elastic electrically conductive shields, in a sheath made of thermoplastic elastomer, has the following advantages:

- increased physical and mechanical properties (tensile strength and elongation);

- increased resistance to abrasion;

- reduced dimensions and weight of the cable;

- a wider range of operating ambient temperature;

- ozone resistance;

- increased service life;

- ergonomic cable (easy introduction of dyes into the shell);

- simplified manufacturing technology;

- the possibility of introducing elements from non-high-temperature materials into the cable structure (since there is no heating of the structural elements during sheathing).

The developed cable is designed for connecting mine mobile machines and mechanisms to electric networks.

Technical specifications

The minimum allowable bending radius of the cable during installation and operation must be at least five nominal outer diameters of the cable.

The electrical insulation resistance of the cable, calculated per 1 km of length and a temperature of 20 ° C - at least 50 megohms.

Long-term permissible temperature on the core is not more than 90 ° C.

Mechanical parameters

The cable is resistant to bending with a bending angle of ± (180 ± 10) ° and a number of bending cycles of at least 10,000.

Resistance to external factors

The cable is resistant to high ambient temperatures up to 65 ° C. The cable is resistant to low ambient temperatures of at least 50 ° C. The cable is resistant to periodic exposure to lubricating oils and diesel fuel.

The cable does not spread combustion in a single installation.

Reliability

The cable service life in the conditions and conditions of ND is at least 3 years.

The cable design is shown in figure 1.

The copper conductive core of the cable (1) meets the requirements of GOST 22483 no lower than class 5. The conductive conductors are insulated with rubber (2). Above the insulation of the main cores, a shield (3) of conductive rubber is superimposed. The main insulated conductors and the group of auxiliary conductors (5) are twisted around the grounding conductor (4) with a pitch of not more than 10 outer diameters and wrapped with synthetic film. A sheath (6) made of thermoplastic elastomer is applied over the winding.

The technical result of the utility model is to increase the technical and operational characteristics of the product, increase the service life.

The main factors of economic efficiency are: reduced dimensions and weight of the cable, increased service life.

Safety requirements are ensured by insulation thickness, overvoltage test.

Literature:

1. GOST R 52372-2005 Flexible cables and cords for underground and open cast mining. General specifications

Claims (2)

1. Cable mine flexible with copper conductors with rubber insulation and electrically conductive elastic screens, in a sheath, power, characterized in that the sheath is made of thermoplastic elastomer. 2. The mine cable according to claim 1, characterized in that thermoplastic polyurethane elastomer serves as thermoplastic elastomer.