RU168097U1 - CABLE FOR ROLLING COMPOSITION OF RAIL TRANSPORT - Google Patents

Abstract

The utility model relates to the field of electrical engineering, namely to cables for rolling stock of rail vehicles. The cable contains insulated twisted copper conductors and a polymer sheath. Sheath material - polyvinyl chloride thermoplastic elastomer mainly of TEP PVC grade ZS-01 or of grade O-50VD / 1. The insulation is made of a polymeric material based on a Cogegum GFR / 365 or Hax ™ HFX 521 polyolefin. The cable may additionally contain a polyethylene terephthalate film applied as a winding over twisted insulated conductive cores. The technical result is an extension of the operating temperature range and increased reliability of the cable.

Description

The utility model relates to the field of electrical engineering, namely to the construction of electric cables that can be used on various types of rolling stock of rail vehicles for connection to movable current collectors, installation with limited movement and fixed installation.

Known cable for rolling stock of rail vehicles, containing twisted copper conductive cores, each of which is coated with polymeric insulation from olefin thermoplastic elastomer, and an outer polymer sheath of polyvinyl chloride thermoplastic elastomer (RF patent No. 88192, 2009).

This technical solution is the closest to the proposed combination of features.

However, the known cable has insufficiently high thermal stability, which increases the risks of insulation damage at high current loads and the failure of the wire during operation.

The task was to develop a cable design for the rolling stock of rail vehicles with high thermal stability at high current loads.

The technical result is achieved by the fact that in a cable for rolling stock of rail vehicles containing twisted copper conductive cores, each of which is coated with polymer insulation, and an outer sheath made of polyvinylchloride thermoplastic elastomer, the insulation is made of a polymer material based on crosslinkable polyolefin Cogegum GFR grades / 365 or Hax ™ HFX 521.

Mostly in the cable, multi-wire conductors made of copper wires are used.

As a sheath material, in one of the preferred embodiments, polyvinyl chloride thermoplastic elastomer of the TEP PVC brand ZS-01 is used.

In another preferred embodiment, polyvinylchloride thermoplastic elastomer grade 0-50VD / 1 is used as the cable material.

According to any of the above embodiments, the cable may further comprise a polyethylene terephthalate film, applied as a winding over twisted insulated conductive cores.

The utility model is illustrated in the drawing, which shows a cable in section.

The cable for rolling stock of rail transport contains twisted conductive conductors 1, insulation 2, outer sheath 3, polyethylene terephthalate film 4.

The following is evidence of the industrial applicability of the utility model.

All materials used in the construction of the cable are well-known and are produced by the industry in accordance with the regulatory and technical documentation for them.

Conductors are made of copper wire rod, manufactured according to TU 16.705-491-2001, in the form of a wire of copper grade MM.

Polyethylene terephthalate film corresponds to GOST 24234-80.

Polyvinyl chloride thermoplastic elastomers are a widespread class of polymeric materials that are used in various industries in Russia and abroad.

So, in particular, TEP-PVC material ZS-01 is produced by NPK Polymer-Compound according to TU 2243-031-36295287-2009, and O-50VD / 1 grade material is produced by Vladimir Chemical Plant OJSC according to TU 2246- 482-05761784-2005 rev. one.

Crosslinkable polymeric materials are available from Sol-vay S.A. (Belgium) under the brand name Cogegum GFR / 365 and the company Fainplast Compaunds (Italy) under the brand name Нах ™ HFX 521.

The manufacturing technology of this cable is traditional for this type of cable products.

The manufacture of the conductive core 1 is carried out by twisting copper wires on a cigar-shaped machine. The imposition of insulation 2 and shell 3 is produced on an extrusion machine. Before applying the sheath 3, the insulated conductors are twisted in one direction with a twisted twist in all directions in a twisting machine.

If necessary, on a tape wrapping machine, a polyethylene terephthalate film 4 is applied over twisted insulated cores.

Samples of insulated cores of the proposed cable and known cable were tested. The permissible current of a one-second short circuit was determined, at which thermal destruction of the cable core insulation does not yet occur. For the cross section of the conductors 16 mm ² , the permissible current of a one-second short circuit was 2.16 kA for the proposed cable and 1.74 kA for the known one.

As follows from the data presented, the proposed cable is able to withstand large current loads due to the increased heat resistance of the insulation.

The technical result consists in expanding the range of operating temperatures and increasing the reliability of the cable at high current loads.

Claims (5)

1. Cable for rolling stock of rail vehicles, containing twisted copper conductive cores, each of which is coated with polymer insulation, and an outer sheath made of polyvinylchloride thermoplastic elastomer, characterized in that the insulation is made of a polymer material based on a crosslinkable polyolefin of Cogegum GFR / 365 or Nah ™ HFX 521. 2. The cable according to claim 1, characterized in that the conductive wires are multi-wire. 3. The cable according to claim 1, characterized in that the sheath is made of polyvinyl chloride thermoplastic elastomer brand TEP PVC ZS-01. 4. The cable according to claim 1, characterized in that the sheath is made of polyvinyl chloride thermoplastic elastomer grade O-50VD / 1. 5. Cable according to any one of paragraphs. 1-4, characterized in that it further comprises a polyethylene terephthalate film, applied in the form of a winding over twisted insulated conductive conductors.

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