RU176668U1 - Flexible shielded mine power cable - Google Patents

Abstract

The utility model relates to the field of electrical engineering, namely, to the construction of flexible flexible mine power cables designed for unsteady laying and connection of mobile machines and electrical equipment in underground workings at a voltage of 1140 and 3300 V AC with a frequency of 50 Hz under conditions of increased mechanical loads. The cable contains insulated copper flexible conductive conductors, insulated control conductors, ground conductor, inner sheath, combined armor made of water blocking threads, copper and steel galvanized wires, and an outer sheath made of thermoplastic polyurethane elastomer. On top of the insulation of conductive conductors made of cross-linked ethylene-propylene rubber, a combined screen is applied, made in the form of a winding from a semiconducting tape, over which a braid of copper wires and synthetic fibers is applied. The central element of the control conductor is made of thermoplastic elastomer. The technical result is an increase in service life. 8 s.p. f-ly, 2 ill.

Description

Technical field

The utility model relates to the field of electrical engineering, namely, to the construction of flexible flexible mine power cables designed for unsteady laying and connection of mobile machines and electrical equipment in underground workings at a voltage of 1140 and 3300 V AC with a frequency of 50 Hz under conditions of increased mechanical loads. Cable control cores are designed to power auxiliary equipment at 220 V AC at a frequency of 50 Hz.

State of the art

Known mine cable (patent RU No. 69675, publ. 12/27/2007), in which conductive conductors are insulated with rubber. Over the insulation of the main cores, a screen of conductive rubber is superimposed. The main insulated conductors and the group of auxiliary conductors are twisted around the earth conductor and wrapped with synthetic film. A thermoplastic elastomer sheath is applied over the winding.

Known power mine cable (patent RU 142761, publ. 07/10/2014), which contains three main insulated conductive conductors, screens for insulation of the main conductors of electrically conductive materials, one or more insulated auxiliary conductors, an uninsulated ground conductor, an inner sheath of PVC compound on top of twisted cores, armor made of galvanized steel tapes or steel galvanized wires over the inner sheath and the outer sheath of PVC compound. The insulation screens of the main conductors are made of extrusion, or tape, including water blocking and metal, electrically conductive materials, or various combinations of these materials.

A disadvantage of the known technical solutions is the short service life due to the imperfection of the design and materials used in the cables.

Utility Model Essence

The technical problem to which the claimed utility model is directed is to develop the design and select materials that together provide an expansion of the product arsenal.

The technical result of the proposed solution is to increase the service life of the cable.

The technical result is achieved by the fact that in the cable a flexible flexible shielded mine cable containing from three to six main insulated conductive conductors, screens for insulation of the main conductors, an uninsulated ground conductor, an inner sheath over twisted conductors, armor and an outer sheath, according to the proposed solution, insulated control conductors with a central element made of thermoplastic elastomer, over which copper wires are laid, the insulation of the main conductors is made of cross-linked ethylene-propylene rubber, When this armor is made of a water blocking imposed by the braid beams, comprising water-blocking yarn, copper and zinc-plated steel wire, and the outer shell is made of thermoplastic polyurethane elastomer.

The control cores can be twisted into a core over which an elastomer sheath is applied.

A shield made of copper wires can be applied over the core shell of the control conductors.

The copper wires of the control conductor can be applied in concentric coils.

Concentric coils can be made in the form of twisted elements - strands.

The copper wires of the control conductor can be braided.

Over the insulation of the control conductors, a screen can be applied by braiding from tinned copper or copper tinned wires.

Thermoplastic insulation can be applied over the screen of the control cores.

The screen for insulation of the main cores can be made combined of a semiconducting tape, a braid of copper wires or tinned copper wires and synthetic threads.

The utility model is illustrated in the drawings.

In FIG. 1 shows a general view of the cable; FIG. 2 general view of a cable with control wires twisted into a core.

The cable consists of copper flexible conductive conductors 1 with insulation 2 of cross-linked ethylene-propylene rubber. Conductor 1 corresponds to the 6th class of flexibility GOST 22483-2012. The combined screen 3 superimposed on top of the insulation 2 is made in the form of a winding of a semiconducting tape, over which a braid of copper wires and synthetic fibers is applied. In insulated control cores 4, the central element 5 is made of a thermoplastic elastomer, over which copper wires are laid. On top of the inner shell 6 of thermoplastic elastomer, a combined armor 7 of water blocking filament, copper and galvanized steel wires is applied. The outer shell 8 is made of thermoplastic polyurethane elastomer. The cable contains a grounding conductor 9. Insulated control conductors 4 can be twisted into a core (Fig. 2), over which an elastomer sheath 10 and a shield 11 are applied.

On top of the core and control cores, a polymer film can be applied by winding or by underflow.

Claims (9)

1. Flexible shielded mine power cable, containing from three to six main insulated conductive conductors, insulation screens of the main conductors, uninsulated ground conductor, inner sheath over twisted conductors, armor and outer sheath, characterized in that insulated control conductors with a central element are introduced of thermoplastic elastomer, over which copper wires are laid, the insulation of the main cores is made of cross-linked ethylene-propylene rubber, while the water blocking armor is made of superimposed method braid beams, comprising water-blocking yarn, copper and zinc-plated steel wire, and the outer shell is made of thermoplastic polyurethane elastomer. 2. The cable according to claim 1, characterized in that the control conductors are twisted into a core over which an elastomer sheath is applied. 3. The cable according to claim 2, characterized in that a screen of copper wires is superimposed over the core shell of the control conductors by braiding. 4. The cable according to claim 1, characterized in that the copper wires of the control conductor are superimposed with a concentric layer. 5. The cable according to claim 4, characterized in that the concentric layer is made in the form of twisted elements - strands. 6. The cable according to claim 1, characterized in that the copper wires of the control core are braided. 7. The cable according to claim 1, characterized in that a shield is applied over the insulation of the control conductors by braiding from tinned copper or copper tinned wires. 8. The cable according to claim 7, characterized in that the insulation of thermoplastic material is applied over the screen of the control cores. 9. The cable according to claim 1, characterized in that the screen for insulation of the main cores is made combined of a semiconducting tape, a braid of copper wires or tinned copper wires and synthetic threads.

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