RU193930U1 - Electro-optic cable - Google Patents

Abstract

The utility model relates to cable technology and can be used mainly for cables used for simultaneous transmission of optical and electrical information signals. The technical result provided by the utility model consists in expanding the arsenal of means of electro-optical communication cables, the design of which provides quick access to conductive wires while maintaining high protection of the optical fibers from external influences and bending. The specified result is achieved by changing the mutual many provisions of the layer of continuous reservation and conductive conductors. 2 ill.

Description

The utility model relates to cable technology and can be used mainly for cables used in the field for the simultaneous transmission of optical and electrical energy (including telecommunication signals).

Known cable designs [US 8487186, B2, Н01В 7/00, 01/11/2008], [RU 109907, Ul, НВВ 11/22, 10/27/2011], [RU 74004, U1, Н01В 9/00, 06/10/2008] , [US 20030235379, A1, G02B 6/44, 06/19/2002], [EP 2270565, A3, G02B 6/44, 06/09/2010], providing simultaneous transmission of optical and electrical energy. Common elements of analog devices are conductive conductors, optical fibers and insulating materials.

The closest in technical essence and function to the analogue of the claimed device is a combined cable for access networks [US 6195487, B1, G02B 6/44, 06/30/1998]. This device is taken as a prototype of the invention.

The prototype device contains a longitudinally located polymer module (tube) containing optical fibers and filled with a hydrophobic gel. The module is covered on top with a water blocking tape. Around the module with the tape, there is a layer of insulated electrical conductors (conductors) intertwined with an SZ-twist. The core insulation is color-coded, one of the conductors of the pair being painted in the color available as a colored strip on the second core of the pair. Conductors are fixed with cable yarn, on which bandage tapes are superimposed. Sealing threads are wound onto the bandage, which are fastened with cable yarn threads. A ripcord and a polymer inner shell are superimposed on top of this design. Tape armor is superimposed on top of the shell, on top of which the outer polymer shell is located.

In the art there is a drawback of the technical solution, namely, that the known combined communication cables do not provide the possibility of quick access to conductive wires, due to continuous booking in conditions of small dimensions of the cable structure. The designs described in the patent patents above (laminar design) have low resistance to bending. This fact narrows the scope (arsenal of means) of electro-optical communication cables.

The technical problem is solved by creating an electro-optical cable by changing the design of the well-known combined cable for access networks by adding new structural elements and changing the order of their connections. The technical result provided by the utility model consists in expanding the arsenal of means of electro-optical communication cables by creating a cable that can be used for simultaneous transmission of optical and electrical energy (including telecommunication signals), the design of which provides quick access to conductive wires while maintaining high protection of optical fibers from external influences and bends.

The specified technical problem is solved in that the electro-optical cable containing a longitudinally polymer module (tube), containing from 1 to 24 optical fibers, and filled with a hydrophobic gel, containing a layer of insulated conductive conductors, the insulation of the conductors is color-coded, internal and external polymer sheaths, according to the utility model, it is supplemented with armor of 6 rope coils of 7 round steel wires with a diameter of 0.1-0.5 mm, while the armor is closely imposed on the module, on top of the armor is an inner sheath and a thickness of 0.1-0.3 mm, on top of which in one layer are arranged pairwise orthogonally longitudinally along a helix with a pitch of 50-150 mm, from 4 to 32 conductive cores, which are copper wires with a diameter of 0.1-2 mm, are paired coated with enamel with a thickness of 0.01-0.15 mm of the same color, an outer shell with a thickness of 0.2-2 mm is applied on top of the cores.

Thanks to the new set of essential features due to the additional elements and connections introduced into the known device, the possibility of simultaneous transmission of optical and electrical energy (including telecommunication signals) is realized, while providing quick access to conductive wires while maintaining high protection of optical fibers from external influences and bends .

The analysis of the prior art made it possible to establish that there are no analogs characterized by a combination of features identical to all the features of the claimed electro-optical cable. Therefore, the claimed utility model meets the condition of patentability “novelty”.

The utility model can be implemented for constructing field fiber-optic communication lines, technological, telemetry lines and fiber-optic communication lines with remote power supply (including three-phase). Existing materials and technologies allow you to implement the claimed electro-optical cable with the achievement of the specified technical result. Therefore, the claimed utility model meets the patentability condition “industrial applicability”.

The inventive device is illustrated by drawings (Fig. 1, Fig. 2), which shows a cross section of an electro-optical cable. In FIG. 1 shows a cross section of an electro-optical cable in a minimal design; with a larger number of optical fibers and conductive conductors, the cross section is shown in FIG. 2.

The electro-optical cable (Fig. 1, Fig. 2) consists of the following elements: optic fibers (1) (from 1 to 24), a hydrophobic filler (2), a module (3), an armor wire rope from steel wires (4) , the inner polymer sheath (5), conductive veins (from 4 to 32), formed by copper wire (6) and colored enamel insulation (7), the outer polymer sheath (8).

The elements of the utility model are interconnected as follows: the optical fibers (1) are freely laid in the module (3), the cavity of the module not occupied by the optical fibers is filled with a hydrophobic gel (2). Module (3) is tightly braided with ropes twisted from 7 round steel wires (4). On top of the reservation by extrusion, an inner polymer shell was applied (5). The inner sheath (5) is externally twisted in a spiral into one layer by at least four conductive cores (6, 7), and the cores forming a pair are located at a diametrical distance from each other. Conductors are formed by copper wires (6) and colored enamel insulation (7), the wires of one pair are painted in the same color. On top of this design, an outer shell (8) of polymer materials was applied by extrusion.

Optical fibers (1) are standard and are described in Recommendations of the International Telecommunication Union G.651.1-G.657.

The hydrophobic gel-like composition (2) is similar to that used in the prototype device, an alternative is the solution described in [EP 1511827, A1, GB02B 6/4494, 06/14/2002], [US 5902849, A, C08K 5/01, 11/12/1996 ].

Module (3) is a rigid polymer tube and is similar to that described in the prototype.

Steel wires (4) are made of galvanized steel (for example, according to GOST 3069-80, GOST 3062-80, GOST 3282-74, EN 10218-2, DIN 1777 or similar standards from steel grades ST0-3 (GOST 380-2008), SAE 1006, 1008 (ASTM A510M)) or stainless steel grade 12X18H20T (or similar), for example, according to TU 14-4-1571-89. Ropes are twisted from round wires in accordance with GOST 3241-91.

Polymeric shells inner (5) and outer (8) are made of polymeric materials, for example polyvinyl chloride, polyethylene, polypropylene, polyurethane, polystyrene or polyamide. The shells are applied by extrusion [Rauwendahl, K. Extrusion of polymers / K. Rauwendahl per. from English - M.: Profession, 2008. - 768 s].

The conductor of the conductive core is a copper wire (6) made of electrical copper M1 and higher according to GOST 859-2014.

Insulation (7) is made of colored enamel formed by polyvinyl acetate, polyurethane, polyester resin, polyimide, polyamide or polyetheririmide. The composition of enamel and the method of applying it to a copper wire (6) are described in more detail in GOST 26615-85.

Electro-optical cable operates as follows. Optical fibers are designed to transmit optical energy, and conductive conductors allow the transmission of electrical energy (including telecommunication signals).

The protection of optical fibers is provided by two layers of a continuous shell, armor and hydrophobic composition. The location of the optical fibers in the center of the structure allows you to keep the bending angle invariant to the direction of bending (unlike laminar structures-analogues).

Rope reservation provides an acceptable level of protection for optical fibers (against tensile and crushing loads) and the cable as a whole against tensile loads. At the same time, minimal dimensions and high flexibility are ensured.

Removing the conductive conductors beyond the reservation circuit allows you to achieve the required speed of access to them, if necessary, by cutting the outer sheath (8) of the cable.

The validity of the theoretical assumptions about the achievement of the technical result was verified using a full-scale experiment using the known methods described in [Kovaleva, OM The express method of determining quantitative criteria for the flexibility of cable products / OM. Kovaleva // Cable-news. - 2009. - No. 5. - S. 61-63.].

Thus, the required technical result is achieved by implementing the claimed utility model and is provided by expanding the arsenal of technical means of electro-optical communication cables while providing quick access to conductive wires and maintaining high protection of optical fibers from external influences and bends.

Claims (1)

Electro-optical cable containing a polymer module with optical fibers placed in it and filled with a hydrophobic gel, a layer of insulated conductive conductors, an inner and outer polymer sheath, characterized in that the armor is made of 6 cable coils from 7 round steel wires with a diameter of 0.1-0, 5 mm, which is closely superimposed on the module, on top of the armor is an inner shell 0.1-0.3 mm thick, on top of which in a single layer are arranged pairwise orthogonally longitudinally along a helix with a pitch of 50-150 mm s, which are made of copper wire with a diameter of 0.1-2 mm, pairwise enamelled 0,01-0,15 mm, superimposed on top of the core outer shell thickness of 0.2-2 mm.

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