RU188805U1 - GROUNDING WIRE, NOT DISTRIBUTING BURNING - Google Patents

Abstract

The utility model relates to cable technology, in particular, to the construction of a ground wire with insulation, the inner and outer sheath of a polyolefin composition containing no halogens, intended for grounding power cable shields of 6-500 kV, as well as connecting cable shields to a transposition cabinet The task of the utility model is to design a ground wire that does not propagate burning during group laying in the PRGP-P1b category of GOST 31565-2012 and with low smoke and gas emission in the PD-1 GO category. ST 31565-2012.Technical result is to improve the fireproof performance of the ground wire. The technical result is achieved by the fact that the ground wire contains one conductive core and an outer sheath made of a halogen-free polyolefin composition and contains insulation from a cross-linked non-halogen composition brand HZ01СХ, and the outer shell is made of a halogen-free polyolefin composition, brand HZ03EP / 8000.

Description

The utility model relates to cable technology, in particular, to the construction of a ground wire with insulation, the inner and outer sheath of a polyolefin composition containing no halogens, intended for grounding power cable shields of 6-500 kV, as well as connecting cable shields to a transposition cabinet .

Known grounding wire according to the patent of the Russian Federation for useful model No. 66596 dated 07.05.2007 publ. September 10, 2007 (selected as a prototype) and the ground wire for the RF patent for useful model No. 125384 (dated 07/09/2012 publ. 02/27/2013)

The disadvantage of cables in patents No. 66596 and 125384 is that such wires propagate combustion and emit smoke in case of fire. These cables cannot be used on objects where fireproof properties are necessary.

The task of the utility model is to design a ground wire that does not propagate burning during group laying in the category of PRGP-P1b GOST 31565-2012 and with low smoke and gas emission in the category PD-1 GOST 31565-2012.

The technical result is to increase the fireproof performance of the ground wire.

The technical result is achieved by the fact that the ground wire contains one conductive core and an outer shell made of a polyolefin composition that does not contain halogens, while over the core it contains insulation from a cross-linked non-halogen composition of the HZ01CX grade, and the outer shell is made of a polyolefin composition that does not contain halogens, brand HZ03EP / 8000.

The wire may additionally contain sealing threads and tapes in the construction of the core.

Also, the wire may additionally contain a winding over the conductor with a fastening conductive in the release tape.

Also, the wire may additionally contain a winding with a water blocking tape over the core insulation.

Also, the wire may additionally contain over the core insulation an inner sheath made of a halogen-free polyolefin composition, brand HZ01BED.

Also, the wire may additionally contain over a conductor insulation a winding with an electrically conductive tape, a concentric conductor, a winding with an electrically conductive tape, an insulation made of a cross-linked halogen-free polyolefin composition, brand HZ01CX.

The concentric core of the wire can be made of copper wires, fastened with a kevlar spiral thread.

Also, a wire instead of winding a tape of electrically conductive material under and over a concentric core may contain a winding tape of electrically conductive water blocking material.

Also, the wire may additionally contain a winding with a water-blocking tape over the insulation of the concentric core.

Implementation of the utility model

The utility model is illustrated in the drawing.

FIG. 1 shows a ground wire in section.

The ground wire contains a conductive core 1, twisted from round copper wires, with sealing elements 2 inside, over which successively are winding tapes of electrically conductive water blocking material 3, insulation of cross-linked halogen-free composition 4, winding tapes of electrically conductive water blocking material 5, concentric copper lived wire 6, fastened with kevlar thread 7, tape winding of electrically conductive water blocking material 8, insulation of cross-linked non-halogen composition 9 , taping of water-blocking material 10, outer sheath of non-halogen composition 11.

The following are information confirming the possibility of the implementation of the utility model.

As a conductive conductor 1 and a concentric conductor 6, copper wire obtained by a process of drawing from copper wire rod is used.

As the sealing elements 2 of the conductive core, water-blocking threads and tapes are used.

Conductive water-blocking tape 3 is designed for longitudinal sealing of the core.

As the material of insulation 4, 9 wires used halogen-free cross-linked polyolefin composition, brand HZ01CX, manufactured by Cabopol.

Electrically conductive water blocking tapes 5, 8 below and above the concentric core 6 are used as a release layer and longitudinal sealing.

Kevlar thread 7 is used as a bonding layer for concentric core 6.

Water-blocking tape 10 is designed for longitudinal sealing of insulation 9.

As the material of the outer shell 11 is used polyolefin composition, not containing halogens, brand HZ03EP / 8000, manufactured by Cabopol.

Applied for the manufacture of the proposed wire materials are produced industrially and are widely used in the manufacture of power cables.

Wire for conductive wire 1 is produced by the process of drawing copper wire rod on a drawing machine. The twisting of the wires into the core with the addition of sealing elements 2 into it is carried out on conventional torsion equipment.

The imposition of insulation 4, 9, the outer shell 11 is carried out on extrusion equipment.

Silanol cross-linking of insulation 4 from a cross-linked halogen-free or cross-linked polyethylene polyolefin composition is carried out in a crosslinking chamber.

The imposition of a concentric core 6, consisting of spirally applied metal wires, fastened with Kevlar thread 7 from above, is carried out on the known torsion equipment, traditionally used in the cable industry.

The winding of electrically conductive water-blocking tapes 3, 5, 8, water-blocking tape 10, carried out on the winding machines used in the cable industry.

The proposed ground wire was tested for non-proliferation of combustion during group laying according to GOST R IEC 60332-3-22, to determine the optical density of smoke during combustion and smoldering according to GOST R IEC 61034-2-. The test results are shown in table 1.

Based on the test results presented in Table 1, it can be concluded that the inventive ground wire, intended for grounding power cable shields for a voltage of 6-500 kV, as well as connecting cable shields to transposition cabinets, ensures compliance with the requirements for non-proliferation of beams ( PRGP-P1b) and smoke emission (PD-1).

Claims (8)

1. A ground wire containing one conductive core and an outer shell made of a halogen-free polyolefin composition, characterized in that over the core it contains insulation from a cross-linked non-halogen composition HZ01CX, and the outer shell is made of a halogen-free polyolefin composition HZ03EP / 8000. 2. The ground wire according to claim 1, characterized in that it additionally contains sealing threads and tapes in the construction of the core. 3. The grounding wire according to claim 1, characterized in that it further comprises a winding over the conductor with a fastening conductive water blocking tape. 4. The ground wire according to claim 1, characterized in that it further comprises a winding with a water blocking tape over the core insulation. 5. The ground wire according to claim 1, characterized in that it additionally contains on top of the core insulation an inner sheath, made of a halogen-free polyolefin composition, brand HZ01BED. 6. The ground wire according to claim 1, characterized in that it additionally contains a winding with an electrically conductive tape, a concentric conductor, a winding with an electrically conductive tape, insulation made of a halogen-free cross-linked polyolefin composition over the core insulation, HZ01CX. 7. The ground wire according to claim 6, characterized in that the electrically conductive tape under and over the concentric core is made of a water blocking material. 8. The ground wire according to claim 6, characterized in that it further comprises a winding with a water blocking tape over the insulation of the concentric core.

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