UA30997U - Floating conductor - Google Patents

Abstract

A floating conductor includes a core, a wrapping, a load-carrying element and a protective coat on the basis of cellular polythene. The core is twisted from even number of insulated with polyethylene conductive copper cords, made as an optical module located in the middle, around of which it is laid a layer from even number of insulated conductors, which alternate with filling elements in the form of insulating cords. The load-carrying element is made in the form of two layers made of high-strength thread.

Description

Description of the invention

The useful model refers to the field of electrical engineering, namely to the constructions of special floating 2 load-carrying wires, communication cables, intended for underwater operation in towing conditions with multiple bends and the influence of hydrostatic pressure.

A known flexible floating cable of the KGPVP type, containing a load-carrying element made of technical SVM threads, located in the center of the cable, several conductive steel copper cores, insulated with polyethylene and twisted on top of the load-carrying element, a shell made of solid polyethylene |Technical conditions. TU 70. 16-505.987-77 "Floating flexible cables".

The specified cable (wire) has the following disadvantages: - high resistance of the current-conducting cores to direct current and low frequency of the transmitted signals (200kHz), which is related to the characteristics of the steel copper wires of the core; - centrally located load-carrying element during multiple cable rewinds Through 12 rollers under tension during operation deforms and further destroys current-conducting cores; - insufficient buoyancy of the cable (--20g/m), because the sheath is made of solid polyethylene with a density of 0.92g/cm Z; - low operational reliability of the cable, because its buoyancy is ensured due to the air gaps between the core elements, and when the outer sheath is damaged, the cable is filled with water, i.e. 720 loses its buoyancy; - there is no possibility of using a cable to transmit optical information signals.

The prototype is a floating communication wire containing a core twisted from insulated conductive cores, belt insulation, a reinforcing load-bearing element and a sheath, which is distinguished by the fact that the core 25 is made of an even number of polyethylene-insulated conductive copper cores twisted in pairs and/or four, the shell is made of a waterproof polymer material with a density of no more than 0.7Og/cmU, and - a reinforcing load-bearing element is superimposed on the belt insulation in the form of braids of synthetic threads or tows of threads with a specific breaking strength of at least 1.8N/tex. Useful model of Russia Mo52514 dated 14.06.2005 | cha zo The basis of the proposed useful model is the task of creating such a floating communication wire, in which due to the introduction of new materials and structural elements, their new mutual arrangement would be (2) improved electrical parameters of communication chains (transmission frequency range, signal attenuation level, b interference protection between links yokes), increased operational reliability of the wire during rewinding under tension. ("c") 35 The task is solved by the fact that in a floating communication wire, which includes a core twisted from an even number of polyethylene-insulated current-conducting copper cores, belt insulation, a load-bearing element in the form of two windings of high-strength threads and a protective sheath on based on porous polyethylene, according to a useful model, the core is made of an optical module located in the center, around which a winding of an even number of insulated cores is laid, which alternate with filling elements, in the form of "cords. -о с The advantages of the proposed floating communication wire are as follows: - the wire has better electrical characteristics, because the cores of two symmetrical pairs for the transmission of communication signals are separated from each other by a greater distance than in the prototype with alternating cords, which reduces the working capacity and damping coefficient of the steam; - the introduction of an additional optical module with several optical single-mode fibers c" into the core allows the use of a floating wire in modern information transmission systems; - execution of the load-bearing element in the form of braids made of high-strength lightweight synthetic threads, (а) superimposed on top of the belt insulation of the core allows to relieve the current-conducting cores from deformations that "c crush", that is, to significantly increase the operational reliability of the wire. 20 Insulated wires and cords can be twisted into a swaddle with a pitch of no more than 40 mm, which significantly increases (Ce) the immunity of transmission chains due to a small twisting pitch. m The filling elements can be made in the form of polyethylene cords with a reinforcing synthetic thread, which increases the resistance of the wire to crushing and additionally protects the cores of symmetrical pairs from possible tensile loads.

The proposed wire is schematically shown in cross-section in the figure, where 1 is an optical module; 2 - conductive core; C - wire insulation; 4 - filling elements in the form of cords; 5 - reinforcing synthetic thread, 6 - fastening element; 7 - inner shell; 8 - a load-bearing element made of two windings of high-strength threads; 9 - protective polymer shell.

The floating communication wire contains a core twisted from an even number of polyethylene-insulated conductive copper cores 2, belt insulation, a load-bearing element 8 in the form of two braids of high-strength threads and a protective sheath 9 based on porous polyethylene. The core is made of an optical module 1, located in the center, around which a winding of an even number of insulated wires 2, which alternate with filling elements 4, is laid in the form of cords.

Example. The floating communication wire (Fig.) contains a core, which is made of an optical module 1, b5 located in the center, around which a winding of four insulated wires 2, which alternate with four filling elements 4, is laid in the form of cords. Optical module 1 contains 4 optical single-mode fibers placed in a polymer shell made of polybutylene terephthalate with a hydrophobic filler. Four current-conducting wires 2 with a cross section of 0.35 mm? twisted from copper wires and covered with polyethylene insulation C, and cords 4 are made of extruded polyethylene with a reinforcing polyester thread 5. Insulated cores 2 and

The cords 4 are twisted around the optical module 1 in a coil with a Zomm pitch.

The core is covered with belt insulation in the form of an inner shell 7 applied by extrusion.

The load-bearing element 8 is superimposed on the core in the form of two mutually opposite windings of bundles of aramid threads. The outer shell 9 is made of porous polyethylene with a density of 0.bg/cm 3 and is applied on the extrusion line.

Claims (4)

The formula of the invention 1. Floating communication wire, including a core twisted from an even number of polyethylene-insulated 75 conductive copper wires, belt insulation, a load-bearing element in the form of two windings of high-strength threads and a protective sheath based on porous polyethylene, which is distinguished by the fact that the core is made from an optical module located in the center, around which a winding of an even number of insulated cores, which alternate with filling elements in the form of cords, is laid. 2. Wire according to claim 1, which differs in that the insulated cores and cords are twisted into a swaddle with a pitch of no more than 40 mm. C. Wire according to claim 1, characterized in that the optical module includes at least two single-mode optical fibers. 4. Wire according to claim 1, which differs in that each cord is made of polyethylene with a reinforcing synthetic thread. shchi z che (22) (22) o Zo «o - and? o o (Se) (Se) that 60 b5