RU167108U1 - COMMUNICATION CABLE SYMMETRIC HIGH FREQUENCY WITH FILM-POROUS POLYETHYLENE INSULATION - Google Patents

Abstract

A symmetrical high-frequency communication cable with film-porous polyethylene insulation, containing copper conductive conductors insulated with film-porous insulation, twisted into star quadruples around a filler core made of polymeric material, wrapped with fastening threads, the latter, in turn, twisted into a core or core with additional signal pairs and conductors, a belt insulation of polymer tapes is sequentially applied to the core, a screen of aluminum-polymer tape, tinned copper is laid under the screen to ntaktnaya wire, and on top of the screen - polyethylene sheath, or protective covers.

Description

The utility model relates to cable technology, namely to the design of communication cables with film-porous polyethylene insulation, intended for use on trunk and intrazonal primary networks and connecting lines of urban telephone networks, in digital transmission systems with a speed of 8448 kbit / s, 34368 kbit / with and analog transmission systems in the frequency range up to 5000 kHz for operation with alternating voltage of remote power supply up to 690 V or constant voltage up to 1000 V.

Known symmetrical high-frequency communication cables with film-porous polyethylene insulation TU 16.K17-034-2003 "Symmetric high-frequency communication cables with film-porous polyethylene insulation" having conductive cores insulated with film-porous polyethylene, belt insulation of synthetic tapes and paper tapes , aluminum shell and shell made of polymer material. The disadvantages of such a cable are:

- large bending radius of the cable with a screen made of aluminum sheath;

- in parallel with the installation of a symmetrical high-frequency cable, it is necessary to lay the signal cable.

The objective of the proposed technical solution is to develop a design of a symmetric high-frequency communication cable with film-porous polyethylene insulation, with a screen made of aluminum-polyethylene tape and additional signal pairs and cores.

The technical result is achieved as follows: in a symmetric high-frequency communication cable, copper-conductive conductors with film-porous insulation are twisted into star quadruples around a filler core made of polymer thread, which in turn are twisted into the cable core, additional veins and pairs can be located between the fours of the cable. A core insulation of polymer tapes, a screen of aluminum-polyethylene tape and a polyethylene sheath are applied along the core. Protective covers according to GOST 7006-72 can be applied over the shell. Screen made of aluminum-polymer tape with an aluminum layer with a nominal thickness of at least 0.15 mm. A tinned copper contact wire with a nominal diameter of 0.4 mm is longitudinally laid under the screen.

Additional cores and pairs located in the core, eliminates the parallel installation of the signal cable.

A screen made of aluminum-polymer tape reduces the bending radius of the cable compared to a cable with a screen made of aluminum sheath.

The inventive utility model is illustrated in the drawing, which is a sectional view of a cable containing copper conductive conductors 1, each of which is coated with a film-porous insulation 2. Insulated conductors are twisted into a star four 3 around a filler core 4 of polymer material, the four are wrapped with a fastener thread 5, which are twisted into the core of the cable 6. In the core between the fours, additional pairs can be located - cores 7. A belt insulation of polymer tapes 8 is imposed on top of the core, a screen of alumopolymer second tape laid 9. Under the screen tinned copper contact wire 10. The top of the screen superimposed sheath 11 of polyethylene or protective covers according to GOST 7006-72.

The technological process of manufacturing a cable is as follows. The combined process of drawing, annealing of copper wire for conductive conductors 1 and the application of film-porous insulation 2 is carried out on an automatic extrusion line. Insulated cores are twisted around a filler core of polymer thread 4 into a star four 3 and fastened with cotton threads 5 on a star four twisting machines. Fours are twisted into a core 6 or core 6 with additional pairs and cores 7, belt insulation 8 is applied on lantern type MKRT machines. The combined process of applying a screen of alumina tape 9, contact tinned copper wire 10 and polyethylene sheath 11 is carried out on an extrusion line.

In the armored version of the cable, the armor is superimposed on tape-armored vehicles.

A protective polymer sheath is applied to the extrusion line.

Claims (1)

A symmetrical high-frequency communication cable with film-porous polyethylene insulation, containing copper conductive conductors insulated by film-porous insulation, twisted into star quadruples around a filler core made of polymeric material, wrapped with fastening threads, the latter, in turn, twisted into a core or core with additional signal pairs and conductors, a belt insulation of polymer tapes is sequentially applied to the core, a screen of aluminum-polymer tape, tinned copper is laid under the screen to ntaktnaya wire, and on top of the screen - polyethylene sheath, or protective covers.

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