UA9745U - Reinforced fiber cable with a two-layer wire sheath - Google Patents

Abstract

The proposed reinforced fiber cable with a two-layer wire sheath contains two layers of galvanized steel wire. Each wire layer is coated with a layer of polymeric material. The first layer is formed by winding wire on the cable core. The second layer is formed by winding wire on the first layer in the winding direction that is opposite to that of the first layer. The diameter of wire for each layer is 1.2 à 2.5 mm. The protecting coating of each wire layer is made of high-density or high-strength polyethylene.

Description

Description of the invention

The utility model relates to fiber optic cables for transmitting optical signals. 2 A known fiber-optic cable, which contains a glass fiber and a protective coating and a sheath are successively applied to it |11. Its disadvantage is the insufficient number of optical channels and low resistance to the action of the external environment.

The closest to the proposed useful model is a fiber-optic cable consisting of a core in the form of a central power element, optical modules placed around it in the form of tubes 70 with optical fibers in them, a hydrophobic substance inside and between the optical modules, a polymer film, a polymer thread and external coating. (2).

The disadvantage of the cable mentioned above is insufficient resistance to the effects of the external environment and mechanical damage, especially in conditions of loose and creeping soils.

The purpose of the useful model is to increase the resistance of the cable to the aggressive action of the external environment and 729 mechanical damage in conditions of permafrost-soil and seismic processes.

The task is solved by the presence of additional elements and their interconnections and cable manufacturing technology.

The conformity of the criterion of "novelty" to the proposed fiber optic cable ensures that it additionally contains a first continuous layer of round galvanized steel wires, a first polymer sheath, a second continuous layer of galvanized steel wires and a second polymer sheath, and the wires in each layer are laid with untwisting in a spiral around the core, the direction of the spiral in each layer is opposite to the direction of the spiral of the other layer, the diameter of the wires in each layer is within 1.2...2.5 mm, and both shells are made of high-density polyethylene or high-strength polyethylene , for example, from bimodal polyethylene.

Compliance with the "significant features" criterion is ensured by the fact that the features inherent in the proposed fiber-optic cable are not contained in the prototype and other technical solutions in this field of technology.

In fig. a schematic representation of a fiber optic cable is given.

The cable consists of a core 9 in the form of a central power element 1, optical modules 2, outer coating C, optical fibers 4, hydrophobic substance 5 inside the tubes of optical modules, o hydrophobic substance b between optical modules, polymer film 7, polymer thread 8. The top of the core "The first layer of galvanized steel wires 10, the first polymer shell 11, the second layer of galvanized steel wires 12, and the second polymer shell 13 are sequentially applied to it.

The cable works like this. Optical fibers 4, which are used to transmit optical signals over the cable, are placed Ge») freely in the environment of a hydrophobic substance 5, inside the tubes of optical modules 2. Due to this, they are 3o protected from the action of mechanical stresses. Optical modules 2 are twisted around the central element 1 in a spiral that periodically changes its direction, which provides the possibility of their free longitudinal movement and resistance to the action of tensile stresses. The space between the optical modules 2 is filled with a hydrophobic substance 6, which protects them from the action of moisture from the external environment. On top of the optical modules 2, longitudinally, with an overlap, a thick polymer film 7 is applied, fastened with a polymer thread 8, which additionally holds the optical modules and prevents the hydrophobic substance b from spreading during the cable manufacturing process. On top of the polymer film 7, an outer coating C made of polymer is applied by the method of extrusion with pressing, which additionally protects the cable from moisture

From" the external environment. Filling the free spaces inside the tubes of the optical modules and between the optical modules with a hydrophobic substance, stacking the optical modules in a spiral that periodically changes its direction, the presence of a polymer film and an external coating in the form of a polymer shell together ensure high flexibility and protection of the cable against the effects of the external environment and the output failure of optical fibers. Longitudinal tensile forces are taken together by the central power element and galvanized steel wires. If the gap between the optical modules is larger than the diameter of the optical module itself, it can be filled with a round polymer rod. Steel wires in each layer 10, 12 are laid in spirals in opposite directions with a twist and have a diameter of 1.2-2.5 mm, which provides under the conditions of manifestations of sl 20 permafrost-soil and seismic processes of perception of the main tensile load. A polymer shell 11 made of high-strength polyethylene is applied between the layers of steel wires. Externally, the cable is additionally protected by a sheath 13, which is also made of high-density polyethylene or polyethylene of increased strength, for example, bimodal polyethylene NE 6062. Together, the layers of wires and two sheaths, which have increased strength, ensure the operation of the cable in conditions of permafrost-soil and seismic processes

SS o5 without damage to the heart.

A sample of the manufactured cable consisted of a central power element and coils around it

With a 2-roll of optical modules in the form of polyisobutylene tubes, in which there are optical fibers, painted on the outside with ink. The ink hardens under the influence of ultraviolet light, which makes it possible to distinguish optical fibers. The hydrophobic substance inside the tubes of the optical modules was applied simultaneously 60 with their manufacture during the extrusion process. The hydrophobic substance between the optical modules was applied together during their twisting and application of the polymer film. The outer covering was made of polyethylene by the extrusion method. Optical modules on top are additionally fastened with two polymer threads applied in spirals, which have the opposite direction. Two layers of steel wires are applied simultaneously with unscrewing.

Both shells are applied by the extrusion method. because the cable passed tests according to TU 31.3-00214534-036-2004 and was recognized as suitable for laying in conditions of permafrost-soil and seismic processes.

Sources of information: 1. US Patent No. 5982967, IPC 502 B 6/44, filed 12.12.97, published 09.11.99, applicant I isepi

Thesppoiodyesis Ips. 2. Declaration patent of Ukraine for utility model Mo 2883, IPC 002 В 66/44, applied for on 07.08.04, published on 08.16.04, Bull. Mo. 8, applicant CJSC Zavod "Pivdenkabel".

Claims (1)

Formula of the invention Reinforced fiber-optic cable with two-layer wire armor, consisting of a core, which is characterized by the fact that it additionally contains a sequentially applied first continuous layer of round galvanized steel wires, a first polymer sheath, a second continuous layer of galvanized steel wires and a second polymer sheath, and the wires in each layer are superimposed with a spiral twist around the core, the direction of the spiral in each layer is opposite to the direction of the spiral of the other layer, the diameter of the wires in each layer lies within 1.2...2.5 mm, and both shells are made of high-density polyethylene or high-strength polyethylene, for example, bimodal polyethylene. - IS) « cha (22) - with . and? se) -I sh" "claim 50 Su; 60 b5