KR101671850B1

KR101671850B1 - Optical cable

Info

Publication number: KR101671850B1
Application number: KR1020160010675A
Authority: KR
Inventors: 진재권
Original assignee: (주)효원엔지니어링
Priority date: 2016-01-28
Filing date: 2016-01-28
Publication date: 2016-11-03

Abstract

The present invention provides an optical cable which can reduce a weight and a cross-section area. The optical cable includes: a first protection pipe (110) having a hole therein; a plurality of internal optical fiber modules (111) coming into contact with the internal surface of the first protection pipe (110); a plurality of external optical fiber modules (121) arranged outside the first protection pipe (110); a second protection pipe (120) having a hole therein; a plurality of support parts (130b) consisting of a support part body (1321), a first wing (1322), a second wing (1323) and a groove (1324); a plurality of connection members (300); a coupler (200) enclosing the outside of the connection members (300); and fastening rings (400a, 400b) fastened to the second protection pipe (120) and the coupler (200).

Description

OPTICAL CABLE

The present invention relates to an optical cable.

As a method of installing a cable in a duct, a method of pulling or pushing a cable at one end of the duct has usually been used. According to this installation method, excessive stress is often applied to the cable. In particular, when the optical cable is installed, the stress is applied to the optical fiber disposed in the optical cable, thereby causing problems such as micro-bending and residual stress on the surface of the optical fiber.

The optical cable applied to such an installation method must have a high tensile strength. Such an increase in the tensile strength is achieved by increasing the outer diameter of the tube disposed in the optical cable, arranging the tensile member, and increasing the thickness of the outer covering.

As another method for installing a cable in a duct, there is known an air pressure installation method in which air is blown from one end of the duct to push the cable with air pressure.

Typically, pneumatic installation cables have many limitations, such as having an outer diameter of less than 80% of the inner diameter of a small duct, and cables of small outer diameter and weight are advantageous for relatively air-tight installation. There is a problem that it is difficult to apply the air pressure installation method because the conventional optical cable has a large outer diameter and a large weight.

Accordingly, there is a demand for an air pressure mounting optical cable having a small outer diameter and a small weight and good tensile strength.

The following Prior Patent 1 is characterized in that the edge of the optical cable has a gentle polygonal cross section and is made compact and lightweight. However, the prior art 1 has a large area occupied by the center tension member, which limits the area of the optical cable.

The following Prior Art 2 discloses that the area of the inner tensile member is reduced, but there is a problem that the tensile strength is not sufficiently improved.

(Prior Patent 1) Published Korean Patent No. 2012-0012712 (published on February 10, 2012) (Prior Patent 2) Registration Practical Utility Model No. 20-0318547 (published on June 27, 2003)

An object of the present invention is to provide an optical cable capable of reducing the weight and the cross-sectional area.

It is still another object of the present invention to provide an optical cable that can be easily and conveniently connected to an optical cable when performing installation work.

Technical aspects of the present invention include: a first protection tube having a hollow formed therein; A plurality of inner optical fiber modules arranged in contact with the inner surface of the first protection tube so as to be symmetrical with respect to the inner surface; A plurality of external optical fiber modules disposed on an outer circumference of the first protective tube; A second protection tube in which a hollow is formed and in which the first protection tube and a plurality of external optical fiber modules are arranged in a hollow; A pair of first and second protective tubes each having a support body slidably contacting a part of a circumference of the first protection tube, one end being coupled to both sides of the support body and the other end being in sliding contact with an inner circumferential surface of the second protection tube, A plurality of support portions formed on the side of the support body, the first wing and the second wing; A plurality of connecting members inserted in correspondence with the shape of the groove; A coupler which surrounds the outside of the connecting member, in which threads having different directions are formed in both ends, and an inner wall is supported by a blade portion of the connecting member; And a fastening ring having a thread formed inside the one end and fastened to the second protective pipe by rotation and threaded on the outside of the other end and fastened to the coupler by rotation, And is configured to support the coupler in different directions. Optical cable.
In addition, it is an object of the present invention to provide an optical cable in which at least one external optical fiber module among a plurality of external optical fiber modules is disposed between the first wing and the second wing.
In addition, the optical cable is provided in a T shape so that the first blade and the end surface of the second blade come into contact with the inner circumferential surface of the second protective tube.
In addition, it is an object of the present invention to provide an optical cable in which a center tension member is further disposed in the hollow of the first protection tube.
In addition, the arrangement of the plurality of internal optical fiber modules is to provide an optical cable which is either a linear type or a spiral type.

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According to the optical fiber of the present invention, it is possible to prevent the strength of the optical cable from being lowered even if the weight and the cross-sectional area are reduced, and the connection and alignment of the optical cable can be made easy and convenient.

1 is a cross-sectional view showing an embodiment of an optical cable according to the present invention.
FIG. 2 is a view showing an embodiment of the support shown in FIG. 1. FIG.
Fig. 3 is a view showing another embodiment of the support shown in Fig. 1. Fig.
Fig. 4 is a view showing that a connecting member is inserted into the optical cable shown in Fig. 1. Fig.
5 is a view showing an embodiment in which an optical cable is connected to a connecting member by a coupler.
6 is an exploded perspective view of the optical cable shown in Fig.

The matters relating to the functional effects of the optical cable according to the present invention, including the technical structure thereof, will be clearly understood by the following detailed description of the preferred embodiments of the present invention with reference to the drawings.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. In this specification, the terms first, second, etc. are used to distinguish one element from another element, and the element is not limited by these terms.

The following detailed description of the invention refers to the accompanying drawings, which illustrate, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the present invention are different, but need not be mutually exclusive. For example, certain features, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in connection with an embodiment. It is also to be understood that the position or arrangement of the individual components within each disclosed embodiment may be varied without departing from the spirit and scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is to be limited only by the appended claims, along with the full scope of equivalents to which such claims are entitled, if properly explained. In the drawings, like reference numerals refer to the same or similar functions throughout the several views.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

1 is a cross-sectional view showing an embodiment of an optical cable according to the present invention.

Referring to FIG. 1, the optical cable 100 includes a first protection tube 110 in which a hollow is formed, a plurality of first protection tubes 110, which are in contact with the inner surface of the first protection tube 110, A plurality of external optical fiber modules 121 arranged in the outer periphery of the first protective tube 110 and a plurality of external optical fiber modules 121 in a hollow form, And a support 130a or 130b for supporting a gap between the first and second protective pipes 110 and 120. The second protective pipe 120 may be formed of a metal,

The optical fiber 100 includes a plurality of optical fiber modules 111 and 121. The optical fiber modules 111 and 121 are circular in cross section and include a plurality of optical fibers 1111 and 1211 and external parts 1112 and 1111 surrounding the optical fibers 1111 and 1211, 1212). In addition, the optical cable 100 may include a first protective pipe 110. The first protection tube 110 is hollow and a plurality of optical fiber modules 111 may be disposed therein. A plurality of optical fiber modules 121 may be disposed outside the first protective pipe 110. Each of the plurality of optical fiber modules 121 disposed outside the first protective pipe 110 may be disposed in contact with the outer circumference of the first protective pipe 110. A plurality of optical fiber modules 111 inside the first protection tube 110 may be referred to as an inner optical fiber module and a plurality of optical fiber modules 121 disposed outside the first protection tube 110 may be referred to as an outer optical fiber module. The external optical fiber module 121 and the first protective pipe 110 may be disposed in a second protective pipe 120 having a hollow therein. In addition, each of the optical fiber modules 111 and 121 may be arranged so as to have a sufficient clearance to be easily pulled out. A cover 140 may be formed on the outside of the second protective pipe 120.

In a general optical cable, a center tension member 101 is disposed inside to provide a tensile force to the optical cable, so that the optical cable can withstand a high compression load and a tensile load. The center tension member 101 may be a single filament made of a nonconductive material such as a fiber reinforced plastic (FRP), an aramid reinforced plastic (ARP), or a filament combination made of twisted filaments. However, when the central tensile member is present in the optical cable, there is a problem that the volume of the optical cable is increased by the volume occupied by the central tensile member 101, which increases the thickness of the optical cable. However, if the center tensile member 101 is not used, there is a problem that it can not withstand a compressive load and a tensile load.

In order to solve the above problems, in the optical cable 100 of the present invention, the hollow first protection tube 110 is disposed inside the second protection tube 120 of the optical cable 100, So that the member 101 can be replaced. The plurality of optical fiber modules 111 are disposed in the space occupied by the center tension member 101 so that the optical fiber 100 according to the present invention has the same cross sectional area as that of the conventional optical fiber, Can be done. At this time, the first protective pipe 110 may be made of a non-conductive material such as fiber reinforced plastic (ARP). Also, the first protective pipe 110 can be lowered in compressive load by the hollow. A plurality of supports 130a may be formed between the first and second protective pipes 110 and 120 so that the first protective pipe 110 and the second protective pipe 120 So that the compression load of the optical cable 100 can be increased.

A central tensile member 101 may be disposed in the hollow of the first protective pipe 110 and a plurality of optical fiber modules 111 disposed in the hollow of the first protective pipe 110 may be disposed in the hollow of the center tension member 101 As shown in FIG. Since the thickness of the central tensile member 101 formed in the hollow of the first protective pipe 110 is smaller than the thickness of the general central tensile member 101, the plurality of optical fiber modules 111 The arrangement method may be a linear method, a spiral method, or an SZ method. However, the present invention is not limited thereto. The center tension member 101 may be made of a non-conductive material such as fiber reinforced plastic, ARP. In addition, the outer circumferential surface of a conductive material such as steel or a core of a nonconductive material such as FRP may be coated with a plastic resin such as PE, PVC or low smoke zero halogen (LSZH).

FIG. 2 is a view showing one embodiment of the support shown in FIG. 1, and FIG. 3 is a view showing another embodiment of the support shown in FIG.

2 and 3, the support portion 130a may include a support body 1311 that is in sliding contact with a part of the circumference (outer circumferential surface) of the first protective pipe 110. [ One end of the first protection tube 110 is protruded from both sides of the support body 1311 and the other end thereof is in sliding contact with the inner circumferential surface of the second protection tube 120 to support the gap between the first protection tube 110 and the second protection tube 120 The first wing 1312 and the second wing 1313 may be provided. Also, at least one external optical fiber module 121 of a plurality of external optical fiber modules 121 may be disposed between the first wing 1312 and the second wing 1313 in the support part 130a. When the support body 1311 is brought into contact with the circumference of the first protection tube 110, the support body 130a is made of a material having high elasticity so that the curvature of the support body 1311 becomes elastic, It can be made to coincide with the curvature. The support portion 130a is pressed against the first protective pipe 110 in such a manner that the compressive load transmitted through the first wing 1312 and the second wing 1313, which are formed in contact with the inner circumferential surface of the second protective pipe 120, So that the support portion 130a, the first protection pipe 110 and the second protection pipe 120 can withstand a larger compression load. 1, the two support body 1311 is shown covering a part of the outer diameter of the first protection tube 110, but the present invention is not limited thereto, It is also possible to cover the whole. Further, the number of the support portions 130a may be two or more.

The support portion 130b shown in FIG. 3 is substantially the same except that a groove 1324 is formed on a side surface of the support portion 130a shown in FIG. 2, and the support body 1301 and the first, (One side) of the optical cable 100a is connected to the other (other side) optical cable 100b through the connecting member 300 so that the connecting member 300 can be inserted into the groove 1324 formed on the side of the wings 1322, ) Can be easily combined with each other. In addition, the optical fiber module 121 disposed on the outer circumferential surface of the first protective pipe 110 can be aligned by the support portion 130b.

FIG. 4 is a view showing that a connecting member is inserted into the optical cable shown in FIG. 1, FIG. 5 is a view showing an embodiment in which an optical cable is connected to a connecting member by a coupler, Fig.

4 to 6, at least two connecting members 300 are formed in the grooves 1324 so as to correspond to the supporting portions 130b of the two optical cables 100a and 100b on one side and the other side, Two different optical cables 100a and 100b may be connected to both ends of the connecting member 300 by being inserted into the groove 1324 to support the coupler 200 in the other direction. The exposed portion of the connecting member 300 may surround the coupler 200 so that two different optical cables 100a and 100b may be connected so that the connecting member 300 is not exposed to the outside. 3 is applied to the optical cables 100a and 100b, the connecting member 300 is inserted into the groove 1324 formed in the supporting portion 130b, and the connecting member 300 is inserted into the groove 1324 formed in the supporting portion 130b, The optical fibers 100a and 100b can be fixed to the optical fibers 100a and 100b. Accordingly, two different optical cables 100a and 100b can be connected to both ends of the connection member 300. [ Further, even if an external force is applied to the coupler 200 and the connecting member 300, the position of the coupler 200 is not changed due to the frictional force, so that the two optical cables 100a and 100b are separated It can be difficult. Since the portion where the coupling member 300 and the coupler 200 abut each other corresponds to the blade portion of the coupling member 300, even if an external force is applied to the coupler 200 in a state where the coupler 200 is engaged, The coupler 200 can be supported by the portion of the blade 301 of FIG.

In addition, the coupling rings 400a and 400b, which are threaded inside the coupler 200 and have external threads, may be inserted into the optical cable through the coupling member 300. [ A thread is formed on the outer periphery of the optical fibers 100a and 100b and a thread is formed on the inner periphery of the portion where the coupling rings 400a and 400b are in contact with the ends of the optical fibers 100a and 100b, And the thread formed on the inner periphery of the fastening ring are coupled to each other so that the fastening rings 400a and 400b can be fixed to the ends of the optical fibers 100a and 100b. The outer diameter of the portion of the fastening rings 400a and 400b fixed to the ends of the optical cables 100a and 100b may be smaller than the diameter of the outer circumference of the optical cables 100a and 100b. In addition, a thread is formed on the outer diameter of the portion contacting with the connecting member 300, so that the two optical fibers 100a and 100b, which are coupled with the thread formed inside the coupler 200, are easily separated even when an external force is applied . The threads at both ends of the coupler 200 may be reversed in direction. In addition, the two fastening rings 400a and 400b inserted into the optical cables 100a and 100b may be arranged so that the directions of threads formed on the outer circumference are opposite to each other. Accordingly, when the coupler 200 rotates in one direction, the threads at both ends of the coupler 200 rotate in the direction of fastening to the fastening rings 400a and 400b, So that the coupler 200 and the fastening rings 400a and 400b can be coupled to each other only by the rotation of the coupler 200. [ can do. This makes it easy and convenient to connect the two optical cables 100a and 100b.

Reference throughout this specification to " one embodiment ", etc. of the principles of the invention, and the like, as well as various modifications of such expression, are intended to be within the spirit and scope of the appended claims, it means. Thus, the appearances of the phrase " in one embodiment " and any other variation disclosed throughout this specification are not necessarily all referring to the same embodiment.

It will be understood that the term " connected " or " connecting ", and the like, as used in the present specification are intended to include either direct connection with other components or indirect connection with other components. Also, the singular forms in this specification include plural forms unless the context clearly dictates otherwise. Also, components, steps, operations, and elements referred to in the specification as " comprises " or " comprising " refer to the presence or addition of one or more other components, steps, operations, elements, and / or devices.

100: Optical cable 101: Center tension member
110: first protection tube 111: internal optical fiber module
120: second protection tube 121: external optical fiber module
130: Support 140: Cloth

Claims

A first protection tube 110 in which a hollow is formed;
A plurality of internal optical fiber modules 111 arranged in contact with the inner surface of the first protective pipe 110 so as to be symmetrical with respect to the inner surface,
A plurality of external optical fiber modules 121 arranged on an outer circumference of the first protective tube 110;
A second protective tube 120 in which a hollow is formed and in which the first protective tube 110 and a plurality of external optical fiber modules 121 are arranged in a hollow;
A supporting body 1321 which is in sliding contact with a part of the circumference of the first protective pipe 110 and one end is protrudingly engaged with both sides of the supporting body 1321 and the other end is slidably inserted into the inner circumferential surface of the second protective pipe 120, A first wing 1322 and a second wing 1323 which contact the first protection pipe 110 and the second protection pipe 120 in such a manner as to support the gap between the first protection pipe 110 and the second protection pipe 120, A plurality of supports 130b having grooves 1324 formed on the sides of the first vanes 1322 and the second vanes 1323;
A plurality of connection members 300 inserted corresponding to the shape of the groove 1324;
A coupler 200 which surrounds the outside of the connecting member 300 and has internal threads formed at opposite ends thereof at opposite ends thereof and whose inner wall is supported by a blade 301 portion of the connecting member 300; And
A fastening ring (400a, 400b) having a thread formed inside the one end thereof and fastened to the second protective pipe (120) by rotation and threaded outside the other end and fastened to the coupler (200) by rotation; Including,
The connection member 300 is formed to be separated into at least two portions corresponding to the support portion 130b and is configured to support the coupler 200 in different directions Optical cable.

The method according to claim 1,
Wherein at least one external optical fiber module (121) of a plurality of external optical fiber modules (121) is disposed between the first wing (1322) and the second wing (1323).

The method according to claim 1,
Wherein an end face of each of the first wing (1322) and the second wing (1323) is formed in a T-shape so as to contact an inner peripheral surface of the second protective pipe (120).

The method according to claim 1,
Wherein a center tensile member (101) is further disposed in the hollow of the first protective pipe (110).

The method according to claim 1,
Wherein the plurality of internal optical fiber modules (111) are arranged in any one of a linear type and a spiral type.