KR20000015278U - Tight bound type super multi-fiber cable - Google Patents

Abstract

The present invention relates to a tight bound type ultra multi-core optical cable, and its purpose is to allow a tight bound type optical cable to be manufactured by a simple facility, and to significantly increase the optical fiber density of the optical cable.

The present invention is a multi-core optical cable having a multi-slot rod, a predetermined coating portion is provided on the outer peripheral surface of the plurality of optical fibers, a predetermined neck portion is formed between the coating portion and the coating portion of the adjacent optical fibers are formed integrally Two tight bound optical fibers are inserted into grooves of the multi-slot rod.

According to the present invention, the tight-bound optical cable aggregates a plurality of single-core optical fibers into a rectangular parallelepiped and forms a thin coating layer on the circumferential surface thereof to form a tight-bound optical fiber, so that each single-core optical fiber is formed on the outer circumferential surface of the sub-tensile wire In this case, there is no need for a stretching device or the like arranged in a spiral shape, and since the outer tension layer and the outer skin layer surrounding the plurality of optical fiber core wires are unnecessary, the optical fiber density is significantly increased.

Description

Tight bound type super multi-fiber cable

The present invention relates to a tight bound ultra multi-core optical cable, and more particularly, a plurality of tight bound optical fibers formed by connecting a plurality of single core optical fibers integrally by a predetermined neck portion are inserted into grooves of a multislot rod. It is about an ultra-high optical fiber cable.

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.

The pipelines are installed between manholes and manholes at regular intervals because they are buried in lengths of hundreds to thousands of kilometers.

In this case, the rope is inserted into the pipeline, and the pipeline is buried underground, and the cable is installed in the pipeline by pulling and connecting the optical cable to the end of the rope.

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, in order to install the optical cable into a conduit having a narrow space, it is a problem that has recently been significantly highlighted in recent years that the diameter of the optical cable should be reduced.

1 is a perspective view of an optical cable having a conventional tight buffer optical fiber.

Referring to this, the optical cable has a central tensile line 41 made of steel wire or high strength synthetic resin is disposed on the central axis line, a plurality of tight buffer type optical fiber 30 unit close to each other on the outer peripheral surface of the central tensile line 41 It is made so as to be covered by a predetermined coating layer while being twisted in a spiral along the longitudinal direction.

Each of the tight buffer optical fiber 30 units is provided with a sub-tension line 31 made of steel wire or high-strength synthetic resin on a central axis line, and a plurality of single-core optical fibers 33 closely adhere to each other on the outer circumferential surface of the sub-tension line 31. It is placed so as to be in close contact with each other by a predetermined coating layer 35 in a spirally twisted state along the longitudinal direction.

Thus, each tight buffer optical fiber 30 unit is arranged by twisting spirally on the peripheral surface of the center tensile line 41, and the single core optical fiber 33 in each tight buffer optical fiber 30 unit is sub-tensioned line 31. The reason for the helical twisting on the circumferential surface is that the material of the center tensile wire 41 or the sub tensile wire 31 and the material of the single fiber optic 33 are different from each other, so that the coefficient of thermal expansion is different. This is because when the coefficient of thermal expansion is different, stress due to thermal expansion is generated inside the single-fiber optical fiber 33, thereby shortening the life of the optical fiber and changing optical characteristics.

The coating layer of the outer surface of the optical cable is made of a waterproof layer 44 coated with a waterproof tape to prevent moisture penetration therein, and made of aluminum or steel to mitigate moisture penetration and external impact on the outer peripheral surface of the waterproof layer 44. A metal coating layer 45 is formed, and a polystyrene (PE) coating layer 46 is formed on the outermost layer.

The tight buffer optical fiber 30 unit is connected to a system or equipment by connecting a single core optical connector to the end of each single core optical fiber.

However, in order to manufacture such a tight buffer optical cable, a plurality of tight buffer optical fibers 30 units are spirally arranged on the peripheral surface of the center tension line 41, and a plurality of single core optical fibers are formed in each tight buffer optical fiber 30 unit. Expensive stranding equipment (stranding) for disposing the twisted spiral (33) must be provided separately, there is a problem that the manufacturing equipment of the optical cable is complicated.

Further, in the optical cable of the above structure, the tight buffer optical fiber 30 unit is provided with a sub-tension line 31 made of steel wire or high strength synthetic fiber on the central axis thereof, and a separate coating layer should be provided on the outer circumferential surface. There is a problem that the optical fiber density of is significantly lowered.

The main object of the present invention is to insert a plurality of tight bound optical fibers formed by forming a thin coating layer on the circumferential surface of a plurality of single-core optical fibers in one bundle form to complete the optical cable by inserting into the groove of the multi-slot rod, It is to provide a tight bound type ultra multi-core optical cable that can significantly increase the optical fiber density by eliminating a separate sub-tension line or a separate coating layer surrounding a plurality of single-core optical fibers.

Another object of the present invention is to form a single integrally formed by a thin coating layer in a state in which a plurality of single-fiber optical fibers are assembled into a rectangular parallelepiped and inserted into the grooves of the multi-slot rod, so that each single-fiber optical fibers are arranged separately in a spiral ( A manufacturing facility that does not need to be equipped with a stranding device provides a simple tight bound ultra-high fiber cable.

1 is a perspective view of an optical cable having a conventional tight-buffered optical fiber,

Figure 2 is a perspective view of a tight bound type super multi-core optical cable according to the present invention,

3 is a cross-sectional view of a tight bound type ultra multi-core optical cable according to the present invention.

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

10: tight bound optical fiber 11: single core optical fiber

13 coating layer 15 neck portion

20: multislot rod 22: groove

The present invention is a multi-core optical cable having a multi-slot rod, a predetermined coating portion is provided on the outer peripheral surface of the plurality of optical fibers, a predetermined neck portion is formed between the coating portion and the coating portion of the adjacent optical fibers are formed integrally Two tight bound optical fibers are inserted into grooves of the multi-slot rod.

Hereinafter, with reference to the accompanying drawings for a preferred embodiment of the present invention in detail as follows.

Figure 2 is a perspective view of a tight bound type super multi-core optical cable according to the present invention.

Referring to this, in the tight bound optical cable, a plurality of grooves 22 having a predetermined depth are formed spirally along the outer circumferential surface of the multi-slot rod 20, and a central tensile line made of steel wire or high strength synthetic fiber is formed on the central axis ( 21 is provided to correspond to the external tensile force, the tight-bound optical fiber 10 is formed by inserting a plurality of single-core optical fibers (11) integrally in the groove (22).

At this time, the multi-slot rod 20 is made of a relatively soft material can constantly alleviate the intensive side pressure acting on any one surface of the tight-bound optical fiber 10 in contact with the inner wall surface of the groove (22). Is done.

The tight bound optical fiber 10 is provided with a predetermined coating portion 13 on the outer circumferential surface of the plurality of optical fibers 11, a predetermined neck between the coating portion 13 and the coating portion 13 of the adjacent optical fibers The portion 15 is formed and made integrally.

In addition, a predetermined coating layer is formed on the outer circumferential surface of the multi-slot rod 20. The coating layer is provided with a waterproof layer 24 coated with a waterproof tape to prevent moisture penetration therein, and the outer circumferential surface of the waterproof layer 24. A metal coating layer 25 made of aluminum or steel is formed to mitigate moisture penetration and external impact force, and a polystyrene (PE) coating layer 26 is formed on the outermost layer.

When described in detail based on the accompanying drawings for the working example of the present invention by the above configuration as follows.

3 is a cross-sectional view of a tight bound optical cable according to the present invention.

Referring to this, the optical cable is provided with a predetermined tight-bound optical fiber 10 formed by integrally forming a plurality of single-core optical fibers 11 by a predetermined coating layer 13, the tight-bound optical fiber 10 A predetermined neck portion 15 is provided between the coating layer 13 and the coating layer 13 of the optical fibers adjacent to each other to easily tear when the branching of the optical cable is used, such a tight bound optical fiber 10 It is made by inserting a plurality of stacked in the groove 22 of the multi-slot rod.

Therefore, since the outer bound layer surrounding the sub-tension line and the plurality of single-core optical fibers 11 is unnecessary inside the tight bound optical cable, the optical fiber density is increased.

In addition, since the tight bound optical fiber is easily cut around a predetermined neck portion 15 and branched into a single fiber, it is very easy to install an optical cable.

In addition, since the plurality of tight bound optical fibers 10 are inserted into the grooves 22 of the multi-slot rod 20, the single-strand optical fibers 11 are separately arranged in a spiral arrangement on the outer peripheral surface of the sub-tension line, etc. Since this is unnecessary, the manufacturing equipment is simplified.

When the present invention is applied to the above, the tight bound optical cable does not need a subtension line and a plurality of optical fiber core wires surrounding the fiber core wire, so that the optical fiber density is significantly increased.

In addition, the tight-bound optical cable is a plurality of built-in tight-bound optical fiber is easily cut around a predetermined neck portion and branched into a single-fiber optical fiber, it is very easy to install the optical cable.

Since the tight bound optical cable is formed by inserting a plurality of tight bound optical fibers into the groove of the multi-slot rod, there is no need for a separate stretching device for spirally arranging the single-fiber optical fibers on the outer circumferential surface of the sub-tension line. It's simple.

Claims (1)

In the multi-core optical cable having a multi-slot rod 20, A predetermined coating part 13 is provided on an outer circumferential surface of the plurality of single core optical fibers 11, and a predetermined neck part 15 is formed between the coating part 13 and the coating part 13 of the adjacent single core optical fiber. Ultra-thick optical cable, characterized in that a plurality of tight-bound optical fiber is formed integrally inserted into the groove (22) of the multi-slot rod (20).