KR100341027B1 - Single-sided open grooves and super multi-fiber cable with it - Google Patents

Abstract

The present invention relates to a single-sided open groove and an ultra multi-core optical cable having the same, and an object thereof is to prevent external force from being dispersed in a circular groove and transmitted to the optical fiber ribbon, and to provide a buffer in the space between the groove and the optical fiber ribbon. Filling is to buffer the external force or side pressure generated on the optical fiber ribbon.

One side groove type groove according to the present invention is characterized in that the opening is cut in a predetermined width along the longitudinal direction on one surface of the tubular member is formed so that a plurality of optical fiber ribbon is laminated through the opening.

In the ultra multi-core optical cable having one side opening groove according to the present invention, in the ultra multi-core optical cable in which a central tensile line is inserted on a central axis, an opening cut in a predetermined width along a length direction is provided on one surface of the tubular member. A plurality of grooves arranged spirally along the longitudinal direction on the outer peripheral surface of the center tensile line, a plurality of optical fiber ribbons inserted to be stacked in the grooves through the openings, and a predetermined coating layer surrounding the plurality of grooves .

According to the present invention, since the groove has a circular structure having sufficient strength, since the external force is distributed through the groove, the external force is prevented from being transmitted on the embedded optical fiber ribbon, and the space between the groove and the optical fiber ribbon Filling a buffer in the buffer to reduce the optical loss by buffering the external force or side pressure acting on the optical fiber ribbon.

In addition, since the groove has a sufficient strength to cope with the external tensile force, no separate tension member is required inside the optical cable, and the optical fiber density is further improved because a plurality of optical fiber ribbons are disposed in the optical cable inner space.

Description

Single Side Opening Groove and Ultra-Multicore Optical Cable with it

The present invention relates to a single-sided opening groove and an ultra multi-core optical cable having the same, and more particularly, to form an opening in one side of the tubular member to insert a plurality of optical fiber ribbons, and to fill an inner space with a buffer to fill the optical fiber ribbon. The present invention relates to a single-sided open groove and an ultra multi-core optical cable having the same, which can prevent external force or side pressure from being applied.

In general, the demand for optical cables is gradually increasing due to the spread of subscriber networks related to various communication services such as LAN, LOCAL AREA NETWORK, bidirectional communication, and video call.

There are various types of such optical fiber cables, depending on the use, and are largely divided into a cable installed outdoors, a cable installed indoors and a cable for entry installed between the outdoors and indoors.

Among these optical cables, outdoor cables may be installed for several tens of kilometers or thousands of kilometers, and when they are buried underground, they are dug into the ground and buried in soil. When an abnormality occurs in a track, it is very difficult to check and repair and replace cables. There is a very difficult disadvantage.

Therefore, to compensate for these disadvantages, a communication tunnel is artificially installed underground and a cable is installed in the tunnel (communication port).

In this case, the maintenance and replacement of the cable is easy, but there is a problem that the overall construction cost is enormous.

Therefore, in recent years, the optical cable construction method is mainly used to install a hollow pipe (Pipe) having a constant diameter in the ground and then insert the cable into the pipe.

In addition, in the case of the incoming optical cable, since the cable from the outdoor cable to the terminal box inside the building must be installed, a predetermined pipeline is formed through the wall of the building and drawn into the building.

Therefore, the optical cable installed through the conduit should be formed to a predetermined diameter so that it can be installed through the installed conduit.

1 is a cross-sectional view of a conventional ultra multi-core optical cable, and FIG. 2 is a cross-sectional view showing a modification of the conventional ultra multi-core optical cable.

Referring to this, the multi-core optical cable is formed in a plurality of grooves 51 spirally along the outer circumferential surface of the multi-slot core 50, the plurality of optical fiber ribbons 53 are inserted into the groove 51 to be stacked, On the central axis is formed a central tension line 31 made of steel wire or synthetic fibers.

In addition, in recent years, as the number of subscribers increases, more ultra-high optical cables are required. For this purpose, the multi-slot core 50 is formed in a multi-layered structure, or a plurality of U on the outer circumferential surface of the multi-slot core 50 of one layer. By arranging the grooves 60 in a spiral manner and inserting the optical fiber ribbons 63 into the U grooves 60 so as to be stacked, an optical cable having more optical fiber cores 63 is manufactured.

However, the optical cable of the above structure is inserted such that a plurality of optical fiber ribbons 53 and 63 are stacked in the groove 51 or the U groove 60 arranged spirally along the outer circumferential surface of the slot core. The optical fiber ribbon 63 inserted into the groove 60 causes lateral side pressure to occur in contact with both side wall surfaces, resulting in optical loss.

In particular, since sufficient extra space is not provided between the optical fiber ribbons 53 and 63 and the sidewalls of the grooves 51 and the U grooves 60, the optical fiber ribbons 53 and 63 inserted therein are not provided. There is a problem that the smoothness is lowered and the more concentrated side pressure is applied to the optical fiber ribbons (53, 63).

The main object of the present invention is to form a tubular groove having sufficient strength so that the external force acting on the groove is prevented from dispersing through the circular groove and transmitted to the optical fiber ribbon, and having a multi-sided open groove having the same To provide an optical cable.

Another object of the present invention is to provide a single-sided opening groove and an ultra-concentric optical cable having a single side opening groove formed therein so as to fill a space between the groove and the optical fiber ribbon with a buffer such as jelly or powder to cushion the side pressure generated on the optical fiber ribbon. .

1 is a cross-sectional view of a conventional multi-core optical cable,

2 is a cross-sectional view showing a modification of the conventional ultra multi-core optical cable,

3 is a perspective view of a single side opening groove according to the present invention;

4 is a cross-sectional view showing a state in which the optical fiber ribbon is inserted into the single side opening groove according to the present invention;

5 is a cross-sectional view showing a modification of the optical fiber ribbon is inserted into the single-sided opening groove according to the present invention;

6 is a cross-sectional view of a first embodiment of a multi-core optical cable having a single-sided open groove according to the present invention;

Fig. 7 is a cross-sectional view of a second embodiment of an ultra multi-fiber optical cable having a single side opening groove according to the present invention.

*** Explanation of symbols for the main parts of the drawing ***

10 groove 11 opening

20: buffer 30: optical fiber ribbon

41: center tensile line 42: waterproof coating layer

43: waterproof coating 44: metal coating layer

45: shell

One side groove type groove according to the present invention is characterized in that the opening is cut in a predetermined width along the longitudinal direction on one surface of the tubular member is formed so that a plurality of optical fiber ribbon is laminated through the opening.

In the one-sided opening groove according to the present invention, the inside of the groove is filled with jelly or powder in a state where the optical fiber ribbon is stacked so as to buffer side pressure or external force.

In the opening groove of one side according to the present invention, the opening width of the groove is formed to be somewhat narrower than the width of the optical fiber ribbon, so that the optical fiber ribbon can be inserted while the opening is opened.

A first embodiment of an ultra multi-core optical cable having a single-sided opening groove according to the present invention is an ultra-multi-core optical cable in which a central tensile line is inserted on a central axis, and is cut in a predetermined width along a longitudinal direction on one surface of a tubular member. An opening is provided, and a plurality of grooves are arranged spirally along the longitudinal direction on the outer peripheral surface of the center tension line, a plurality of optical fiber ribbons inserted to be stacked in the grooves through the openings, and a predetermined coating layer surrounding the plurality of grooves. It has formed features.

The second embodiment of the ultra multi-fiber optical cable having a single-sided opening groove according to the present invention is a ribbon loose tube which is located on a central axis and inserted into a plurality of optical fiber ribbons in a conventional super multi-fiber optical cable. An opening cut into a predetermined width along a longitudinal direction is provided on one surface of the tubular member, and a plurality of grooves spirally arranged along the longitudinal direction on an outer circumferential surface of the ribbon-shaped loose tube and inserted into the groove through the opening; A plurality of optical fiber ribbons and a predetermined coating layer surrounding the plurality of grooves.

Hereinafter, with reference to the accompanying drawings for a preferred embodiment of one side opening groove according to the present invention will be described in detail.

3 is a perspective view of a single side opening groove according to the present invention.

Referring to this, the short side opening groove 10 is provided with an opening 11 cut into a width somewhat narrower than the width of the optical fiber ribbon 30 along a longitudinal direction on one surface of the tubular member to open the opening 11 to open the optical fiber. It is configured to insert the ribbon 30.

At this time, the material of the groove 10 is made of a metal or non-metal (FRP) material of ductility and sufficient strength to be manufactured so as to sufficiently correspond to the external tensile and impact force, even if a separate tensile line is not provided, the groove 10 It is configured to be installed using.

In addition, the plurality of optical fiber ribbons 30 are inserted into the grooves 10 to be stacked, and the optical fiber ribbons are filled with a buffer 20 such as jelly or powder in the space between the optical fiber ribbons 30 and the grooves 10. It is made to buffer the external force or side pressure acting on the (30).

Referring to the accompanying drawings with respect to the working example of the one-side opening groove according to the present invention by the above configuration in detail as follows.

4 is a cross-sectional view showing an optical fiber ribbon inserted into a single side opening groove according to the present invention, Figure 5 is a cross-sectional view showing a modification of the optical fiber ribbon inserted into a single side opening groove according to the present invention. .

Referring to this, the single side opening groove 10 is inserted into the plurality of optical fiber ribbons 30 in a state in which the opening 11 formed on one surface is uniformly stacked, and then the groove 10 and the optical fiber ribbon 30 are stacked. The space between the filling the buffer 20, such as jelly or powder to prevent the external impact or side pressure action on the optical fiber ribbon (30).

In this case, the optical fiber ribbon 30 inserted into the groove 10 may be inserted in a state in which a plurality of optical fiber ribbons 30 are laid down, or a plurality of optical fiber ribbons 30 may be inserted in close contact with each other.

The groove 10 is made of a metal or non-metal (FRP) having both ductility and sufficient strength at the same time when the groove 10 is used when the groove 10 is applied to the optical cable, even if a separate tension line is not provided, It can fully cope with external tension.

In addition, even if an external force is applied to the groove 10, since the groove 10 is circular, the transmitted external force is distributed on the groove 10, so that the external force is transmitted on the embedded optical fiber ribbon 30. Will be prevented.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the first embodiment of a multi-core optical cable having a one-side opening groove according to the present invention will be described in detail.

6 is a cross-sectional view of a first embodiment of an ultra multi-core optical cable having a single side opening groove according to the present invention.

Referring to this, the ultra-multi-core optical cable has a central tensile line 41 made of steel wire or non-metal (FRP) on the central axis, a plurality of short side opening grooves 10 on the peripheral surface of the central tensile line 41 Are arranged in a spiral of a two-layer structure along the longitudinal direction, and a predetermined coating layer is formed on the outer surface of each of the grooves 10 layers.

The short side opening groove 10 has an opening 11 cut into a width slightly narrower than the width of the optical fiber ribbon 30 along a longitudinal direction on one surface of the tubular member to open the opening 11 to open the optical fiber ribbon 30. It is configured to insert.

In addition, the plurality of optical fiber ribbons 30 are inserted into the grooves 10 to be stacked, and then filled with a buffer 20 made of jelly or powder in the space between the optical fiber ribbons 30 and the wall of the grooves 10 so that external force or The side pressure is made to buffer the action on the optical fiber ribbon 30.

The single-sided open groove 10 is formed on the circumferential surface of the center tensile line 41 so that a plurality of the adjacent grooves 10 are adjacent to each other to form a groove layer of one layer arranged spirally along the longitudinal direction of the center tensile line 41. On the peripheral surface of the groove layer of one layer, a waterproof layer 42 is formed with a predetermined waterproof tape.

Subsequently, on the periphery of the waterproof layer 42, a plurality of single-sided opening grooves 10 are positioned to be adjacent to each other, and two groove layers are arranged spirally along the longitudinal direction, and the periphery of the groove layers of the two layers is formed. A predetermined coating layer is formed in the.

The coating layer is formed of a waterproof layer 43 surrounding two groove layers with a waterproof tape, and a metal coating layer 44 is formed of aluminum or steel tape on the periphery of the waterproof layer 43 to transmit external force into the cable. The outer surface layer of the metal coating layer 44, that is, the outer surface layer of the polyester layer of the polyethylene layer 45 is formed.

An operation example of the first embodiment of the ultra multi-core optical cable having a single-sided opening groove according to the above configuration will be described in detail with reference to the accompanying drawings.

6 is a cross-sectional view of a first embodiment of an ultra multi-core optical cable having a single side opening groove according to the present invention.

Referring to this, the multi-core optical cable is inserted into the groove 10 and the optical fiber after inserting a plurality of optical fiber ribbons 30 in a state in which the opening 11 formed on one surface of the single-sided opening groove 10 is constantly opened. The space between the ribbons 30 is filled with a buffer 20 made of jelly or powder and installed in a multi-layered structure inside the cable.

In addition, since the groove 10 has a circular structure of metal or nonmetal (FRP) having ductility and sufficient strength at the same time, even if external force or impact force is applied to the optical cable, the external force or impact force transmitted is distributed through the groove 10. Therefore, the external force is prevented from being transmitted on the embedded optical fiber ribbon 30.

In addition, since the buffer 20 such as jelly or powder is filled in the space between the groove 10 and the optical fiber ribbon 30, the side pressure generated on the optical fiber ribbon 30 is buffered by the jelly or powder. The optical loss of the optical fiber ribbon 30 can be reduced.

Hereinafter, a preferred embodiment of a second embodiment of a multi-core optical cable having one side opening groove according to the present invention will be described in detail with reference to the accompanying drawings.

Fig. 7 is a cross-sectional view of a second embodiment of an ultra multi-fiber optical cable having a single side opening groove according to the present invention.

Referring to this, the ultra-multi-core optical cable has a ribbon-type loose tube optical fiber 47 in which a plurality of optical fiber ribbons 30 are embedded on a central axis, and a plurality of short sides on a circumferential surface of the ribbon type loose tube optical fiber 47. The opening grooves 10 are arranged spirally in a two-layer structure along the longitudinal direction, and a predetermined coating layer is formed on the outer surface of each of the grooves 10 layers.

The short side opening groove 10 has an opening 11 cut into a width slightly narrower than the width of the optical fiber ribbon 30 along a longitudinal direction on one surface of the tubular member to open the opening 11 to open the optical fiber ribbon 30. It is configured to insert.

In addition, after inserting a plurality of optical fiber ribbon 30 in the groove 10 to be stacked, the space between the optical fiber ribbon 30 and the groove 10 is filled with a buffer 20 such as jelly or powder to the external force or side pressure This is done to buffer the concentrated occurrence.

The single-sided open groove 10 is formed on the circumferential surface of the ribbon-type loose tube optical fiber 47 so that a plurality of the adjacent grooves 10 are adjacent to each other to form a single layer groove layer spirally arranged along the longitudinal direction thereof, and the groove of the single layer groove On the perimeter of the layer, a waterproof layer 42 is formed of a predetermined waterproof tape.

Subsequently, on the periphery of the waterproof layer 42, a plurality of single-sided opening grooves 10 are positioned to be adjacent to each other, and two groove layers are arranged spirally along the longitudinal direction, and the periphery of the groove layers of the two layers is formed. A predetermined coating layer is formed in the.

The coating layer is formed of a waterproof layer 43 surrounding two groove layers with a waterproof tape, and a metal coating layer 44 is formed of aluminum or steel tape on the periphery of the waterproof layer 43 to transmit external force into the cable. The outer surface layer of the metal coating layer 44, that is, the outer surface layer of the polyester layer of the polyethylene layer 45 is formed.

An operation example of the second embodiment of the ultra multi-core optical cable having a single side opening groove according to the above configuration will be described in detail with reference to the accompanying drawings.

Fig. 7 is a cross-sectional view of a second embodiment of an ultra multi-fiber optical cable having a single side opening groove according to the present invention.

Referring to this, the multi-core optical cable is inserted into the groove 10 and the optical fiber after inserting a plurality of optical fiber ribbons 30 in a state in which the opening 11 formed on one surface of the single-sided opening groove 10 is constantly opened. The space between the ribbons 30 is filled with a buffer 20 such as jelly or powder and installed in a multi-layered structure inside the cable.

In addition, since the groove 10 has a circular structure of metal or non-metal (FRP) having both ductility and sufficient strength at the same time, even if external impact force or concentrated external force is applied to the optical cable, the transmitted external force rides on the groove 10. Since it is distributed, the external force is prevented from being transmitted on the embedded optical fiber ribbon 30, and the groove 10 has sufficient strength to cope with external tensile force, so that a separate tension member is unnecessary in the optical cable.

Therefore, the ribbon-type loose tube optical fiber 47 is inserted in the central axis where the conventional center tension line is disposed, thereby improving the optical fiber density of the optical cable.

In addition, since the buffer 20 such as jelly or powder is filled in the space between the groove 10 and the optical fiber ribbon 30, the side pressure generated on the optical fiber ribbon 30 is buffered by the jelly or powder. The optical loss of the optical fiber ribbon 30 can be reduced.

In addition, even if an external force is applied to the groove 10, since the groove 10 is circular, the transmitted external force is distributed on the groove 10, so that the external force is transmitted on the embedded optical fiber ribbon 30. Is prevented.

According to the present invention, since the single-sided opening groove and the ultra multi-core optical cable having the same are formed in a circular structure of metal or non-metal (FRP) having both ductility and sufficient strength at the same time, even if an external force is applied, the groove is dispersed in the groove. Therefore, the external force is prevented from being transmitted on the built-in optical fiber ribbon.

In addition, since a buffer such as jelly or powder is filled in the space between the groove and the optical fiber ribbon, external force or side pressure acting on the optical fiber ribbon is buffered by the jelly or powder to reduce optical loss of the optical fiber ribbon. .

In addition, since the groove has a sufficient strength to cope with the external tensile force, no separate tension member is required inside the optical cable, and the optical fiber density is further improved because a plurality of optical fiber ribbons are disposed in the optical cable inner space.

Claims (5)

A single-sided opening groove, which is formed of a tubular member so that the inner space is circular, and has an opening cut in a length direction on one side of the tubular member, and a plurality of optical fiber ribbons are laminated and inserted into the tubular member. The method of claim 1, And a buffer material filled between the optical fiber ribbon and the tubular member laminated and inserted into the tubular member to buffer the side pressure applied to the optical fiber ribbon. The method according to claim 1 or 2, The width of the opening is formed to be slightly narrower than the width of the optical fiber ribbon so that the opening of the single-sided opening groove, characterized in that configured to insert the optical fiber ribbon in a state slightly open. In the ultra-fiber optical cable in which a central tensile line is inserted on a central axis, and a plurality of optical fiber ribbons are stacked and inserted in the outer periphery of the central tensile line, and a coating layer is formed to protect the optical fiber ribbon. The fiber-optic ribbon is formed of a tubular member having a circular internal space to be laminated and inserted, and has an opening in the longitudinal direction, and includes a groove disposed in a spiral direction and extending in the longitudinal direction around the center tensile line. Ultra-high fiber optic cable. In order to protect the optical fiber ribbon, a ribbon-type loose tube optical fiber inserted on a central axis and laminated with a plurality of optical fiber ribbons, a plurality of optical fiber ribbons laminated and inserted around an outer periphery of the loose tube optical fiber, In a super multi-fiber optical cable having a coating layer formed on the outside, The fiber-optic ribbon is formed of a tubular member having a circular internal space to be laminated and inserted, and has an opening in the longitudinal direction, and includes a groove disposed in a spiral direction and extending in the longitudinal direction around the center tensile line. Ultra-high fiber optic cable.