ES2534142B1 - Cable for fiber optic connections adjusted with flexible and segregated dielectric self-support - Google Patents

Abstract

Cable for fiber optic connections adjusted with flexible and segregated dielectric self-support that is configured from a cover (2) divided into two cores, one larger (2a) and one smaller (2b), connected by a junction bridge (3) , counting the major core (2a) with one or more adjusted optical fibers (6), which are protected unitarily with an aramid tape arranged longitudinally and in the form of a tube (7), and the minor core (2b) with a flexible dielectric aramid cord as a self-supporting reinforcement element (5). The aramid tape tube (7) that protects each of the optical fibers (6) is covered by a halogen-free thermoplastic coating (8), flame retardant and low smoke emission which is easy to separate, without Use special tools. Also in the major nucleus (2a) are aramid spinning (9).

Description

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F1BRA OPTICAL ACCESSORIES CABLE ADJUSTED WITH FLEXIBLE AND SECREGABLE DIELECTRIC SELF-SUPPORT

DESCRIPTION

OBJECT OF THE INVENTION

The invention, as stated in the present specification, refers to a cable for fiber optic connections fitted with flexible dielectric self-support and segregate, which provides, to the function to which it is intended, several advantages and novelty characteristics which will be described in detail below and that represent an improved alternative to the systems currently known for the same purpose.

More particularly, the object of the invention is centered on an adjusted fiber optic cable, with flexible dielectric self-support to provide ultra-fast communications service by fiber optic to the subscriber, which has the peculiarity of being composed of two cores distributed in a rectangular profile that are separated from each other by two throats. On the major side of the profile there are one 6 two fiber optic micro-cables adjusted, each of which is reinforced by an aramid tape arranged longitudinally in the form of a tube and surrounding the fiber adjusted and covered in turn by a Special halogen-free compound, flame retardant retardant, low smoke emission and easy peeling without the need for special tools.

On the lower side of the profile is the second core that contains a flexible aramid cord, intended to serve as a self-supporting cable assembly. The two cores thus described are protected by a common outer sheath and are joined together by a junction bridge of the same material as the cable sheath.

FIELD OF APPLICATION OF THE INVENTION

The field of application of the present invention is part of the telecommunications sector, focusing particularly on the field of industry dedicated to the

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manufacture of elements and components, especially connection cables, for fiber optic installations that provide ultra fast communications services.

BACKGROUND OF THE 1NVENTION

The evolution of the requirements for transmission and reception of increasing volumes of information requires communication services to ensure the transmission of information at increasing rates. To ensure higher transmission speeds, it is necessary to use new types of connection cable with greater bandwidth and lower serial losses at high frequencies.

One of the solutions to give the subscriber ultra fast telecommunications services with greater bandwidth is the optical fiber.

For the installation of the fiber optic connection in the final section of access to the subscriber, cables are required that are prepared to withstand the mechanical loads to which the cable itself is subjected in this last section, for which it is provided with an element of reinforcement or self-support.

In addition, in the last section of access to the subscriber, the installation can be carried out externally by air, by facade or inside the building, by means of horizontal and vertical connections with lengths according to the distance to the house and the height of the building.

Under these installation conditions, the cable assembly should be prepared to withstand the mechanical loads to which it may be subjected both during the installation process and during its use after installation, while reliably maintaining the fiber transmission characteristics optics.

To facilitate the work of connectorization of the microcables at both ends of the connection, cad§ micro cable, if it does not have its own aramid protection and its own cover cannot be easily connectorized since it is necessary to resort to a process of fusion of the fiber, which is usually cumbersome in field conditions.

As it refers to the current state of the art, it should be mentioned that the applicant himself is

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Spanish Patent holder with application number 200702973, relating to a “Subscriber cable for fiber optic connections with dielectric self-support”, in which a cable of this type is already disclosed which is sectioned in the form of eight and comprising two cores separated by a junction bridge, where the largest of the cores incorporates one or more optical fibers protected by aramid filler elements, which may be of the type of loose optical fibers tucked into a tube and protected by filler gel, while The minor nucleus contains an aramid dielectric filler cord. However and unlike what is proposed here, this cable does not meet the needs of resistance to mechanical loads and, on the other hand, the optical fibers contained in the major core of the cable have neither their own coating nor covers which makes its field connectorization is more laborious and usually requires fusing of the fibers.

From the Spanish patent with application number 200803299, of which the applicant himself also owns, another “Subscriber cable for ultra-fast fiber optic connections with improved high-strength self-support” is known, in this case, being a type of cable very similar to that described in the previous patent, the cable has a rectangular section configuration and is divided into two cores by a union bridge, the minor core incorporating a galvanized steel cable as a self-supporting element consisting of multiple wires , while in the larger core where the optical fibers are loosely incorporated in a tube and protected by filling, the existence of a tear cord is provided.

In this case, while the steel cable provide greater resistance to loads, it does not have the necessary flexibility that is required in many of the facilities. In addition, the optical fibers also have neither their own coating nor covers. Its connectorization in the field, therefore, is also more laborious and usually requires fusing of the fibers. In addition, the self-supporting cable is metallic, which requires the installation to be grounded, with the consequent increase in work and material costs.

The objective of the present invention is, therefore, to develop a new type of supply cable that improves its configuration with respect to those already known, avoiding the problems they present and to favor a simpler and faster connectorization, and it should be noted that, at least by part of the applicant, it is unknown the existence of any other cable of this type that has technical and structural characteristics similar to

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the ones proposed here, as claimed.

EXPLANATION OF THE INVENTION

The cable for fiber optic connections adjusted with flexible and segregible dielectric self-support that the present invention proposes is therefore configured as a remarkable novelty within its field of application, since according to its implementation and in a taxable way the previously stated objectives, the characterizing details making it possible and distinguishing it from what is already known, conveniently set forth in the final claims that accompany the present specification thereof.

Specifically, what the invention advocates is a cable for fiber optic connections that, as noted above, is configured in a conventional way from two cores, one major and one minor, segregated by being formed by the same covered and joined together by a union bridge. Also in known manner, the major core contains several optical fibers and, optionally, a tear cord, while the minor core contains a self-supporting reinforcing element.

Thus, in order for the fiber optic connection cable to resist the mechanical loads to which it may be subjected in the installation, a reinforcing element is needed that serves as a self-support for the cable assembly. In the cable object of the present invention and according to a first characteristic thereof, a flexible aramid cord with high tensile strength is used as a self-supporting element.

The fact that the self-supporting cable is composed of aramid gives the cable assembly a high degree of mechanical flexibility that facilitates the installation process, while maintaining the dielectric properties of the entire cable.

The fact that the dielectric self-supporting cable is housed in a second core separated from the main nycleo by means of two throats that determine the joint bridge, allows the easy separation of the self-supporting element together with the material that covers it, to facilitate this way its mechanical fastening, thus fulfilling the function of support of the whole cable assembly.

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In addition, the fact that the self-supporting element is dielectric avoids the need to have to ground the cable once installed.

So that the optical fiber of the supply cable for outdoor installations is not affected by the action of moisture, in the present invention it is provided that the optical fiber micro cables are accompanied by aramid yarns especially impregnated with blocking elements. the possible moisture penetration.

The subscriber cable for self-supported fiber optic connections outside, inside and outside passages inside the house or building, reinforced with flexible and dielectric self-supporting elements, to provide ultra-fast communications services in the section end of access to the subscriber, is also designed to facilitate its easy connectorization, for which, according to another of its essential characteristics, the optical fibers of the same, which are contained in the major core of the cable, are fibers adjusted instead of loose fibers as in other similar cables already known, and each of said optical fibers is protected by an aramid tape arranged longitudinally and in the form of a tube surrounding the adjusted fiber.

In addition, said aramid tape tube is coated, in turn, by a thin coating of a halogen-free thermoplastic compound, flame retardant and low smoke emission.

This cover, in addition, is easy to separate without the need to use special tools, all of which facilitates the aforementioned connectorization of the fibers in the field.

Likewise, the described optical fiber micro cables, are combined within the greater core also of several aramid spins, which in addition to acting as reinforcement of said greater core of the cable, protect the optical fiber micro cables against moisture penetration.

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The described cable for fiber optic connections adjusted with flexible and segregated dielectric self-support thus represents an innovative structure of structural and constitutive characteristics unknown until now for the purpose to which it is intended, reasons that together with its practical utility, provide it with a foundation. enough to get the privilege

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of exclusivity that is requested.

DESCRIPTION OF THE DRAWINGS

To complement the description that is being made and in order to help a better understanding of the features of the invention, this descriptive report is accompanied, as an integral part thereof, of a set of pianos, in which with character Illustrative and not limiting, the following has been represented:

Figure number 1 shows a schematic sectional view of an example of realization of the cable for fiber optic connections fitted with flexible and segregated dielectric self-support, object of the invention, showing in it the parts and elements comprising said cable, as well as the configuration and disposition of each of said parts and elements.

PREFERRED EMBODIMENT OF THE INVENTION

In view of the aforementioned figures, and in accordance with the numbering adopted, a preferred but not limiting example of the recommended cable can be observed, which comprises the parts and elements indicated and described in detail below.

Thus, as seen in Figure 1, the cable (1) in question is of the type that is configured from a cover (2) divided into two cores, one larger (2a) and one smaller (2b), which they are connected to each other by means of a joint bridge (3) determined by longitudinal slots (4), in order to facilitate the segregation of the cable in both cores.

Also in a known manner, the minor core (2b) contains a self-supporting reinforcing element (5) formed by a dielectric and flexible aramid cord, while the major core (2a) contains several optical fibers (6), with the particularity that each of said optical fibers (6) are tight fibers and are protected unitarily with an aramid tape arranged longitudinally and in the form of a tube (7) surrounding the adjusted fiber.

Also said tube (7) of aramid tape that protects each of the optical fibers (6)

This, in turn, is covered by a thin covering or coating (8) of a halogen-free thermoplastic compound, flame retardant and low smoke emission.

Said coating (8), in addition, is easy to separate, without requiring special tools to do so.

Finally, the optical fibers (6) are incorporated into the major core (2a) accompanied by several aramid spins (9), which in addition to acting as reinforcement of this major core (2a) of the cable, protect the optical fibers of humidity.

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Optionally, a tear cord (10) can be housed in the major core (2a) of cable, whose function is, as the name implies, to facilitate tearing of the cable cover (2) to allow the separation of the optical fibers (6) in the operations of connectorization.

15 Describing sufficiently the nature of the present invention, as well as the way of putting it into practice, it is not considered necessary to extend its explanation so that any expert in the field understands its scope and the advantages that derive from it, stating that , within its essentiality, it may be Nevada to practice in other forms of realization that differ in detail from that indicated by way of example, and to which 20 will also achieve the protection that is required provided that it is not altered, changed or modified its fundamental principle.

Claims (3)

5 10 fifteen twenty 25 ES 2 534 142 A1 1. - CABLE FOR FIBER ACCESSORIES 6PTICA ADJUSTED WITH FLEXIBLE AND SEGREGABLE DIELECTRIC SELF-SUPPORT which, being of the type of cable that is configured from a cover (2) divided into two cores, one larger (2a) and one smaller (2b) , joined by a union bridge (3) that facilitates its segregation, counting the major nucleus (2a) with one or several optical fibers (6) and the minor nucleus with a self-supporting reinforcing element (5), is characterized in that the element of self-supporting reinforcement (5) is formed by a dielectric and flexible aramid cord, and because each of said optical fibers (6), which are tight fibers, are protected unitarily with an aramid tape arranged longitudinally and in the form of tube (7) surrounding the tight fiber. 2. - CABLE FOR ADJUSTMENT OF OPTICAL FIBER ADJUSTED WITH FLEXIBLE AND SEGREGABLE DIELECTRIC SELF-SUPPORT, according to claim 1, characterized in that the tube (7) of aramid tape that protects each of the optical fibers (6) is, in turn, covered by a halogen-free thermoplastic coating (8), flame retardant and low smoke emission; and because said coating (8) is easy to separate, without it being necessary to use special tools. 3. - CABLE FOR ACCESSORIES OF FIBER 6PTICA ADJUSTED WITH FLEXIBLE AND SECREGABLE DIELECTRIC SELF-SUPPORT, according to claim 16 2, characterized in that the optical fibers (6) are incorporated into the major core (2a) accompanied by several aramid spins (9).