KR20140120537A - Gel free Optical Ground Wire - Google Patents

Abstract

A gel free OPGW according to an embodiment of the present invention includes an optical fiber unit in which at least one optical fiber core is formed, a conjugated yarn which surrounds the optical fiber unit to prevent the optical fiber core from being separated from the optical fiber unit, a waterproof unit which maintains a preset interval with the optical fiber unit and protects the optical fiber unit against water, a first tube which surrounds the optical fiber unit and the waterproof unit, and a coating alloy wire which is arranged in contact with the outer side of the first tube, supports the center thereof, and protects the first tube against an external environment.

Description

Gel free OPGW (Gel free Optical Ground Wire)

TECHNICAL FIELD The present invention relates to Gel free OPGW, and more particularly, to a gel free OPGW in which a range of an optical fiber in a stainless steel first tube, a softening rate of a waterproof yarn, a thickness of a waterproof yarn, a number of strands of a waterproof yarn, The present invention relates to a gel-free OPGW which improves optical loss characteristics by minimizing the stress of the optical fiber.

Generally, in the case of a machined line installed in a steel tower and used for transmission, a wire which is a lightning conductor at the top of the electric wire line is required because a lightning strike can strike a transmission line.

In addition, OPGW is installed so that it can function as a remote branch of the transmission line by inserting an optical fiber which is not influenced by the electromagnetic induction of adjacent power lines as well as the above-mentioned working ground wire .

When the water is penetrated into the optical fiber inside the optical fiber composite processing branch line, the static fatigue of the glass tends to proceed, so that the mechanical reliability is lowered or the hydrogen gas is generated by the chemical reaction with the metal in the cable and the hydrogen loss of the optical fiber is increased .

So the jelly compound was charged in the stainless steel tube to prevent water from penetrating into the fiber or moving water inside the cable.

In the case of the OPGW filled with Jelly, since the washing operation is required to connect the optical fiber, not only the connection time is consumed, but also, when the compound leaks to the soil and water quality, serious environmental pollution occurs.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a water- In case of moisture penetration inside, the yarn or powder expands, blocking the flow of water in the stainless steel loose tube or the PBT loose tube, thereby preventing hydrogen loss in the optical fiber and corrosion of the connecting device or the end device. free OPGW.

The present invention has been conceived to solve the problems of the prior art as described above, and it is an object of the present invention to provide an optical fiber and a waterproof yarn inserted in a stainless steel tube, an excess lenght of the waterproof yarn, a tensile strength of the optical fiber and the waterproof yarn, To minimize the stress between the optical fiber and the radiator and to provide Gel free OPGW capable of improving the optical loss characteristic.

The gel free OPGW according to an exemplary embodiment of the present invention includes an optical fiber unit in which at least one optical fiber core wire is formed, a cyanide fiber that surrounds the optical fiber unit to prevent the optical fiber core wire from being separated from the optical fiber unit, A first tube formed so as to surround the optical fiber unit and the waterproof unit, and a second tube disposed so as to be in contact with an outer surface of the first tube to protect the first tube from the external environment while supporting the center, And the like.

The composite gold wire is disposed so as to be in contact with the outer surface of the first tube and surrounds the first tube and the coated steel wire so as to protect the first tube and the coated steel wire from the external environment, And an alloy wire to be formed.

The composite gold wire is disposed so as to be in contact with the outer surface of the first tube so as to be in contact with the outer surface of the alloy wire and the alloy wire formed so as to surround the first tube from the external environment so as to protect the first tube, And a coated steel wire which is made of steel.

And a second tube formed between the first tube and the coated steel wire so as to surround the first tube.

Further, the first tube and the second tube are formed of steel tubes of different materials.

The first tube is made of stainless steel and the second tube is made of aluminum.

Further, the waterproof unit is characterized in that the waterproof powder is attached to the continuous yarn, or the waterproof powder is formed into a yarn shape and twisted or bonded together with the continuous yarn.

Further, an excess fiber length of the optical fiber core wire in the first tube is in a range of 0% or more and 0.8% or less, and an elongation percentage of the waterproof unit is in a range of 0% or more and 0.8% or less.

The tension of the optical fiber in the first tube is in the range of 0.3 N or more and 3 N or less, and the tensile strength of the waterproof unit is in the range of 0.3 N or more and 3 N or less.

The thickness of the waterproof unit in the first tube is 300 denier or more and 2000 denier or less.

The waterproof powder may be formed of any one of polyacrylate, PVA maleic acid reactant, isobutylene maleic acid copolymer, polyacrylonitrile polymer, polyethylene oxide crosslinked product, starch acrylonitrile polymer or starch acrylic acid graft polymer .

Further, the joint yarns are formed in different colors to distinguish optical fiber core wires of the same color.

Further, it is characterized in that grease is applied to the outside of the coated steel wire or alloy wire.

Gel free OPGW according to an embodiment of the present invention is characterized in that when water is penetrated into the inside of a cable by inserting a Water Blocking Yarn or a Water Blocking Powder instead of Jelly used for preventing penetration of moisture in a stainless steel loose tube or PBT loose tube The expansion of the yarn or powder can prevent moisture loss in the stainless steel loose tube or the PBT loose tube, thereby preventing hydrogen loss in the optical fiber and corrosion of the connecting device or the end device.

According to one embodiment of the present invention, the gel free OPGW limits the range of the optical fiber and the waterproof yarn such as the exergy loss, the tension of the optical fiber and the waterproof yarn, and the thickness of the waterproof yarn to minimize the stress between the optical fiber and the waterproof yarn, There is an effect that the loss characteristic can be improved.

1 is a cross-sectional view of a gel-free OPGW according to an embodiment of the present invention.
Figure 2 is a chart illustrating Gel free OPGW according to various embodiments of the present invention.
3 is a cross-sectional view of a gel-free OPGW according to another embodiment of the present invention.

1 is a cross-sectional view of a gel-free OPGW according to an embodiment of the present invention.

1, a Gel free OPGW 100 according to an exemplary embodiment of the present invention includes an optical fiber unit 110, a cyanogen coupler 120, a waterproof unit 130, a first tube 140, .

The optical fiber unit 110 is formed with at least one optical fiber core wire. In this optical fiber unit 110, at least one optical fiber core wire is formed. At this time, the optical fiber core wire may be formed in the same color or in different colors.

The cyanogen coupler 120 is formed by surrounding the optical fiber unit 110 to prevent the optical fiber core line from being detached from the optical fiber unit 110. Such cyanogen couplers 120 may be formed in different colors to distinguish optical fiber core lines of the same color. That is, the optical fiber unit 110 can be efficiently distinguished by forming the cyan coupler 120 in different colors according to various conditions.

The waterproof unit 130 can block the optical fiber unit 110 from moisture while maintaining a predetermined gap with the optical fiber unit 110. [ The waterproof unit 130 may be formed by attaching the waterproof powder to the continuous yarn, or by forming the waterproof powder into a yarn form and twisting or bonding together with the continuous yarn.

At this time, the waterproof powder may be formed of any one of a polyacrylate type, a PVA maleic acid reactant, an isobutylene maleic acid copolymer, a polyacrylonitrile polymer, a polyethylene oxide crosslinked product, a starch acrylonitrile polymer or a starch acrylic acid graft polymer have.

The first tube 140 is formed so as to surround the optical fiber unit 110 and the waterproof unit 130. The first tube 140 is formed of a steel tube, and may be formed of stainless steel. That is, the first tube 140 may be formed of a stainless steel tube and surround the optical fiber unit 110 and the waterproof unit 130.

The complex gold wire 180 is disposed in contact with the outer surface of the first tube 140 to protect the first tube 140 from the external environment while supporting the center. The composite wire 180 may be composed of a coated steel wire 160 and an alloy wire 170.

The coated steel wire 160 is disposed to be in contact with the outer surface of the first tube 140 to support the load while acting as a center supporting line. This covered steel wire 160 may include an aluminum material to serve as a center support line for supporting the load of the cable from the lightning stroke.

The alloy wire 170 is formed by surrounding the first tube 140 and the coated steel wire 160 to protect the first tube 140 and the coated steel wire 160 from the external environment. The alloy wire 170 is formed of an aluminum material, which is the same material as the coated steel wire 160, and can improve the electrical characteristics of the cable through a highly conductive material when a lightning stroke occurs.

Further, grease can be applied to the point where the friction wire 160 or the alloy wire 170 is rubbed to achieve a higher performance corrosion prevention characteristic than the case where it is installed in an area having high salinity such as a coast area.

Although not shown in FIG. 1, the gold wire 180 is disposed so as to be in contact with the outer surface of the first tube 140 to protect the first tube 140 from the external environment while supporting the center, The wire 170 and the coated steel wire 160 may be used.

The alloy wire 170 may be disposed in contact with the outer surface of the first tube 140 and may be formed so as to surround the first tube 140 to protect the outer tube 140 from the external environment.

The coated steel wire 160 is arranged to be in contact with the outer surface of the alloy wire 170 and can support the load while acting as a center supporting wire.

That is, the wire bundle 180 may be formed such that the coated steel wire 160 and the alloy wire 170 are reversed in position.

As described above, the gel free OPGW according to an embodiment of the present invention includes the first tube 140, the waterproof unit 130 is formed inside the first tube 140 while maintaining a predetermined gap from the optical fiber unit 110, The standard for indicating the range depending on the length of the jacket 110 and the waterproof unit 130 may be an Excess Length.

The softening rate may be defined as a ratio of the length of the first tube 140 to the length of the first tube 140 in the longitudinal direction of the optical fiber unit 110 or the waterproofing unit 130.

Here, when inserting the gel-free OPGW including the optical fiber unit and the waterproofing unit 130 into one first tube 140, mutual stress due to the difference in effort length occurs, It can invite degradation.

If the fiber of the optical fiber unit 110 in the first tube 140 is low, when the gel-free OPGW cable is wound around a strong tensile force or drum or the like, the cable is bent to a certain radius or less, Can be increased.

Conversely, if the softening rate of the optical fiber unit 110 is high, the stress such as the interference between the optical fiber core lines in the first tube 140 and the friction of the first tube 140 may occur, resulting in a decrease in optical loss.

If the softening rate of the waterproof unit 130 in the first tube 140 is low or high, stress may be applied to the optical fiber unit 110 in the first tube 140, resulting in high optical loss.

Accordingly, in order to minimize the optical loss of the optical fiber unit 110, it is necessary to limit the softening rate of the optical fiber unit 110 and the waterproof unit 130 in the first tube 140.

Therefore, the excess fiber length of the optical fiber unit 110 in the first tube 140 is in the range of 0% to 0.8%, and the softening rate of the waterproof unit 130 is in the range of 0% to 0.8% .

Thus, the optical fiber unit 110 and the waterproofing unit 130 can minimize the influence on the optical fiber according to the softening rate in the first tube 140, thereby improving the light loss characteristic.

In addition, it is preferable that the tension for maintaining the softening rate of the optical fiber unit 110 and the waterproof unit 130 is within a range of 0.3 N or more and 3 N or less.

In order to improve the water absorption rate of the waterproof unit 130, it is necessary to increase the unit volume of the waterproof unit 130, that is, the thickness of the waterproof unit 130. Therefore, in order for the waterproof unit 130 to have a good waterproof capability, It is preferable that the thickness of the light guide 130 is at least 300 denier.

However, since the waterproof unit 130 must be inserted into the first tube 140, when the thickness of the waterproof unit 130 is thicker than 2000 denier, it may be difficult to manufacture the waterproof unit 130. Accordingly, it is preferable that the thickness of the waterproof unit 130 is formed in the range of 300 denier or more and 2000 denier or less.

Figure 2 is a chart illustrating Gel free OPGW according to various embodiments of the present invention.

Referring to FIG. 2, Gel free OPGW according to various embodiments of the present invention is shown in the first to tenth embodiments.

≪ Embodiment 1 >

The gel free OPGW according to the first embodiment of the present invention includes an optical fiber unit 110, a cyanogen 120, a waterproof unit 130, a first tube 140, a coated steel wire 160, And an alloy wire (170). A detailed description thereof will be omitted.

The tensile strength of the optical fiber unit 110 is 0.3 N. The tensile strength of the waterproof unit 130 is 0.67% and the tensile strength of the waterproof unit 130 is 0.3 N, and the thickness of the waterproof unit 130 may be 400 denier.

≪ Embodiment 2 >

The Gel free OPGW according to the second embodiment of the present invention is as follows.

The tensile strength of the optical fiber unit 110 is 0.45%, the tensile force of the optical fiber unit 110 is 0.8 N, the waterproofing unit 130 has an elongation of 0.42%, and the tensile strength of the waterproof unit 130 is 0.8 N And the thickness of the waterproof unit 130 may be 500 denier.

≪ Third Embodiment >

The Gel free OPGW according to the third embodiment of the present invention is as follows.

The tensile strength of the optical fiber unit 110 is 0.3%, the tensile force of the optical fiber unit 110 is 1.5 N, the elongation rate of the waterproof unit 130 is 0.28%, and the tensile strength of the waterproof unit 130 is 1.5 N And the thickness of the waterproof unit 130 may be 1000 denier.

<Fourth Embodiment>

The Gel free OPGW according to the fourth embodiment of the present invention is as follows.

The tensile strength of the optical fiber unit 110 is 0.22%, the tensile force of the optical fiber unit 110 is 2.0 N, the waterproofing unit 130 has an elongation of 0.19%, and the tensile strength of the waterproof unit 130 is 2.0 N And the thickness of the waterproof unit 130 may be 2000 denier.

<Fifth Embodiment>

The Gel free OPGW according to the fifth embodiment of the present invention is as follows.

The tensile strength of the optical fiber unit 110 is 0.11%, the tensile force of the optical fiber unit 110 is 2.5 N, the waterproofing unit 130 has an elongation rate of 0.08%, and the tensile strength of the waterproof unit 130 is 2.5 N And the thickness of the waterproof unit 130 may be 2000 denier.

<Sixth Embodiment>

The Gel free OPGW according to the sixth embodiment of the present invention is as follows.

The tensile strength of the optical fiber unit 110 is 0.88%, the tensile force of the optical fiber unit 110 is 0.2 N, the waterproofing unit 130 has an elongation of 0.92%, and the tensile strength of the waterproof unit 130 is 0.2 N And the thickness of the waterproof unit 130 may be 250 denier.

<Seventh Embodiment>

The Gel free OPGW according to the seventh embodiment of the present invention is as follows.

The tensile force of the optical fiber unit 110 is -0.03%, the tension of the optical fiber unit 110 is 3N, the tensile force of the waterproof unit 130 is 3N, and the thickness of the waterproof unit 130 is 300 denier .

&Lt; Eighth Embodiment >

The Gel free OPGW according to the eighth embodiment of the present invention is as follows.

The tensile strength of the optical fiber unit 110 is 0.45%, the tensile force of the optical fiber unit 110 is 0.8 N, the ductility of the waterproof unit 130 is 0.88%, the tensile strength of the waterproof unit 130 is 0.25 N , And the thickness of the waterproof unit 130 may be 1000 denier.

&Lt; Example 9 &

The Gel free OPGW according to the ninth embodiment of the present invention is as follows.

The tear strength of the optical fiber unit 110 is 0.25 N, the tensile strength of the optical fiber unit 110 is 0.25 N, the rate of softening of the waterproof unit 130 is 0.27%, the tension of the waterproof unit 130 is 1.5 N , And the thickness of the waterproof unit 130 may be 2000 denier.

<Tenth Embodiment>

The Gel free OPGW according to the tenth embodiment of the present invention is as follows.

The tensile strength of the optical fiber unit 110 is -0.02%, the tension of the optical fiber unit 110 is 3N, the rate of softening of the waterproof unit 130 is 0.29%, the tension of the waterproof unit 130 is 1.5N , And the thickness of the waterproof unit 130 may be 500 denier.

The evaluation of Gel free OPGW according to the first to tenth embodiments of the present invention described above is as follows.

The optical loss characteristics were expressed as the average of the difference between the optical fiber measurements before and after the manufacture of Gel free OPGW, and the loss factors were determined based on the loss factor of the 1550 nm wavelength band of the single mode optical fiber.

The waterproofing property was evaluated as passing if the water was not leaked to the end of the cable when the 1 m length of the cable was cut horizontally and the water pressure at 1 m was applied to the one end at 23 ° C for 24 hours.

Based on these evaluations, the results of Gel free OPGW according to the first to tenth embodiments of the present invention are as follows.

As in the first to fifth embodiments, when the gel free OPGW was manufactured, the optical loss characteristics were good and the waterproof properties were good.

On the other hand, as in the sixth to tenth embodiments, when the gel free OPGW is manufactured, the optical loss of the optical fiber unit 110 is as high as 0.07 dB. This is because the lifetime of the optical fiber unit 110 and the water- 130 is high, friction occurs between the optical fiber unit 110 and the waterproof unit 130, thereby increasing optical loss.

Particularly, in the case of the seventh embodiment, the tensile strength of the waterproof unit 130 is high and disconnection has occurred.

In the eighth embodiment, the optical loss of the optical fiber unit 110 is as high as 0.08 dB. This is because the softening rate of the optical fiber unit 110 is stable, but the softening rate of the waterproof unit 130 is high, The loss is increased.

In the ninth embodiment, the optical loss of the optical fiber unit 110 is as high as 0.09 dB. This is because stress is applied to the optical fiber itself even if the softening rate of the waterproof unit 130 is stabilized because the softening rate of the optical fiber unit 110 is high .

In the tenth embodiment, the optical loss of the optical fiber unit 110 is extremely high at 0.1 dB. This is because the softening rate of the optical fiber unit 110 is too low to be stressed in the process of manufacturing the waterproof unit 130, Respectively.

As described above, when Gel free OPGW according to various embodiments of the present invention is inserted into one first tube 140 during manufacture of a cable which is Gel free OPGW for the optical fiber unit and the waterproof unit 130, The mutual stress caused by the effort length difference occurs, which may cause a decrease in optical loss.

That is, when the soft fiber of the optical fiber unit 110 in the first tube 140 is low, when the gel-free OPGW cable is wound around a strong tensile force or a drum when the cable is laid, the cable is bent to a certain radius or less, The interference of the optical fiber core wires in the first tube 140 and the stress of the first tube 140 such as friction may occur and the optical loss may be lowered have.

If the softening rate of the waterproof unit 130 in the first tube 140 is low or high, stress may be applied to the optical fiber unit 110 in the first tube 140, resulting in high optical loss.

It may be desirable to limit the softening rate of the optical fiber unit 110 and the waterproof unit 130 in the first tube 140 in order to minimize the optical loss of the optical fiber unit 110. [

Therefore, the extrusion fiber length of the optical fiber in the first tube 140 is in the range of 0% to 0.8%, and the softening rate of the waterproof unit 130 is in the range of 0% to 0.8% The tension for maintaining the softening rate of the unit 110 and the waterproof unit 130 is formed within the range of 0.3 N or more and 3 N or less and the thickness of the waterproof unit 130 is formed in the range of 300 to 2000 denier It is possible to minimize the influence on the optical fiber according to the softening rate in the first tube 140 of the optical fiber unit 110 and the waterproof unit 130, thereby improving the optical loss characteristic.

3 is a cross-sectional view of a gel-free OPGW according to another embodiment of the present invention.

3, the gel free OPGW 200 according to another embodiment of the present invention includes an optical fiber unit 210, a cyanogen 220, a waterproof unit 230, a first tube 240, a second tube 250, And a coated steel wire (260).

The function of each component corresponding to Gel free OPGW according to another embodiment of the present invention and the organic relation between them are identical to those of Gel free OPGW 100 according to an embodiment of the present invention. The functions of the components, and the organic relationship among them, and therefore, respective further explanations thereof will be omitted below.

And a second tube 250 formed between the first tube 240 and the coated steel wire 260 so as to surround the first tube 240.

The first tube 240 and the second tube 250 are formed of steel tubes of different materials. The first tube 240 is formed of stainless steel and the second tube 250 is formed of aluminum .

While the present invention has been particularly shown and described with reference to particular embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Accordingly, various modifications can be made to the optical fiber units 110 and 210, the first and second tubes 140, 240 and 250, the waterproof units 130 and 230, and the exterior of the gel free OPGW. Further, it is to be noted that the present invention is not limited to the structure and components of the gel-free OPGW, and the structure and components of the embodiments, and it is possible to include various structures and components as necessary.

110, 210: Optical fiber unit 120, 220:
130, 230: Waterproof unit 140, 240: First tube
160,260: Coated steel wire 170: Alloy wire
180: gold wire 250: second tube

Claims (13)

An optical fiber unit in which at least one optical fiber core wire is formed;
A cyanocoupler formed around the optical fiber unit to prevent the optical fiber core wire from being detached from the optical fiber unit;
A waterproof unit capable of blocking the optical fiber unit from moisture while maintaining a predetermined gap with the optical fiber unit;
A first tube formed around the optical fiber unit and the waterproof unit; And
A composite gold wire disposed to be in contact with the outer surface of the first tube and configured to protect the first tube from the external environment while supporting the center;
Including Gel free OPGW.
The method according to claim 1,
The complex gold wire
A coated steel wire disposed to be in contact with an outer surface of the first tube and supporting a load while serving as a center supporting line; And
And an alloy wire formed by surrounding the first tube and the coated steel wire to protect the first tube and the coated steel wire from the external environment.
The method according to claim 1,
The complex gold wire
An alloy wire disposed so as to be in contact with the outer surface of the first tube and formed so as to surround the first tube from the external environment so as to protect the first tube;
And a coated steel wire disposed in contact with the outer surface of the alloy wire to support the load while acting as a center support line.
The method according to any one of claims 1 to 3,
And a second tube formed between the first tube and the coated steel wire and surrounding the first tube.
The method of claim 4,
The first tube and the second tube are made of steel tubes of different materials. The method of claim 5,
The first tube is made of stainless steel and the second tube is made of aluminum. Gel free OPGW.
The method of claim 4,
The waterproof unit is formed by waterproof powder attached to continuous yarn or waterproof powder in the form of yarn and formed by twisting or bonding with continuous yarn.
The method of claim 4,
The Excess Fiber Length of the optical fiber core wire in the first tube is in the range of 0% to 0.8%, and the Young's modulus of the waterproof unit is in the range of 0% to 0.8%.
The method of claim 4,
The tension of the optical fiber in the first tube is in the range of 0.3 N or more and 3 N or less, and the tensile strength of the waterproof unit is in the range of 0.3 N or more and 3 N or less.
The method of claim 4,
The thickness of the waterproof unit in the first tube is Gel free OPGW which is in the range of 300 denier to 2000 denier.
The method of claim 7,
The waterproof powder may be selected from the group consisting of polyacrylate based, PVA maleic acid reactant, isobutylene maleic acid copolymer, polyacrylonitrile polymer, polyethylene oxide crosslinked product, starch acrylonitrile polymer or starch acrylic acid graft polymer, Gel free OPGW .
The method of claim 4,
The joints are formed by different colors of gel free OPGW.
The method of claim 10,
Gel free OPGW which is coated with grease on the outside of the coated steel wire or alloy wire.

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