KR102299292B1 - Anti Rodent Optical Cable - Google Patents

Abstract

The present invention relates to an optical cable for a high-capacity overhead line in which the weight of the cable can be minimized while securing the anti-radiation function and the ADSS (All-dielectric self-supporting) performance.

Description

Optical cable with anti-corrosion function {Anti Rodent Optical Cable}

The present invention relates to an optical cable having an anti-rodent function. More particularly, the present invention relates to an optical cable for a high-capacity overhead line in which the weight of the cable can be minimized while securing the anti-radiation function and the all-dielectric self-supporting (ADSS) performance.

Recently, optical cables are mainly used as communication cables, and these optical cables are often installed in the form of overhead lines.

When optical cables are installed in the form of overhead lines, the cables are often damaged by rodents such as mice or squirrels. In rodents such as rats and squirrels, due to the nature of the incisors growing continuously, if left unattended, the incisors cannot function as the incisors, and the length of the incisors is maintained by continuously grinding the incisors in addition to feeding behavior due to the problem of the elongated incisors digging into the roof of the mouth. have the habit of

In the case of using an optical cable for processing, a squirrel or rat may gnaw the cable for grinding the front teeth, causing a problem that the cable is damaged.

Conventionally, in order to provide an anti-corrosion function, a method of wrapping a steel tape or the like inside the exterior of a cable is considered, or as disclosed in Japanese Patent Laid-Open No. 2004-292317, silafluorphen and microencapsulation in a cable A method of including a preservative containing capsaicin and the like was used.

However, when using a steel tape, the steel tape must be grounded separately, and when applied to an overhead line, there is a problem in that the weight is increased. If the tape cannot be used and the outer jacket of the cable contains capsaicin, the problem of not being able to provide a continuous protection function during the period of use of the cable due to the deterioration of capsaicin or insecticides such as silafluorphen over time there was

In addition, there is a method of providing a nylon layer inside the outer shell instead of a steel tape to provide a rust-proof function, but it was confirmed experimentally that the anti-glare performance was only about 80% compared to the steel tape, so it was not possible to provide a sufficient anti-glare function. .

7 shows a cross-sectional view of an optical cable having a conventionally introduced anti-radiation function.

Specifically, FIG. 7 shows a representative view of Utility Model No. 20402841 registered in China, and Utility Model No. 20402841 registered in China is composed of a plurality of arcuate FRP members 2 on the outside of the core 1 to provide a protection function to the optical cable. A technology in which the anti-defense layer wraps the core 1 has been introduced.

As shown in FIG. 7, each of the plurality of arcuate FRP members 2 is configured in a rectangular shape with sharp corners bent in an arcuate shape or an arc shape, and there is no gap between adjacent arcuate FRP members 2 can be checked

The protection layer composed of the arcuate FRP member 2 of this type is normally judged to be able to protect the core of the cable from rodents, but when the cable is twisted or bent, the arcuate FRP member constituting the protection layer Some of (2) is twisted or a problem such as being pushed up by interference due to sharp edges of the adjacent arcuate FRP member 2 may occur. In addition, since the anti-corrosion layer is tightly composed of a plurality of arcuate FRP members 2 with sharp corners, if a specific arcuate FRP member 2 leaves the anti-protection layer, it is expected to be difficult to return to its original position.

And, when the anti-defense layer for the anti-fouling function is configured by arranging the arcuate FRP member 2 without gaps, it is necessary to apply the arcuate FRP member 2 having various curvatures according to the diameter of the cable, so when manufacturing optical cables of various diameters There may be a problem that the manufacturing cost also increases.

In addition, if the outer diameter of the core 1 and the radius of curvature inside the arcuate FRP member 2 do not match, the FRP member 2 may not contact the core and a lifting phenomenon may occur between the FRP member and the core.

These problems mean that the original shape of the cable cannot be maintained and a specific part of the core may not be protected by the protection layer, which leads to a problem of reducing the protection performance and durability of the cable.

An object of the present invention is to provide an optical cable for a high-capacity overhead line in which the weight of the cable can be minimized while securing the anti-rodent function and the ADSS (All-dielectric self-supporting) performance.

In order to solve the above problems, the present invention provides a core including at least one optical unit in which a plurality of optical fibers are accommodated; A plurality of protection members arranged side by side to surround the core, the width (W) is greater than the thickness (t) and a flat shape; and an outer jacket surrounding the outside of the plurality of protection members.

In addition, the width of the anti-fouling member may be 1.5 millimeters (mm) to 4.0 millimeters (mm), and the thickness may be 0.5 millimeters (mm) to 2.0 millimeters (mm).

In this case, the plurality of anti-fouling members are arranged to be spirally wrapped along the longitudinal direction of the core, and the pitch may be 300 millimeters (mm) to 1000 millimeters (mm).

인 경우, 2πR -

값이 0.1 밀리미터(mm) < 2πR -

< 2.0 밀리미터(mm) 범위를 만족할 수 있다.And, when the number of the anti-protection member is n, the distance from the center of the cable to the center of the thickness of the anti-protection member is R, and the sum of the widths (W) of the plurality of anti-protection members is

If , 2πR -

Values are 0.1 millimeters (mm) < 2πR -

< 2.0 millimeters (mm) can be satisfied.

Here, the plurality of protection members may include at least one protection member having a different width.

In addition, the plurality of anti-fouling members may be in contact with the core, respectively.

In this case, the plurality of anti-fouling members may include portions in which adjacent anti-fouling members are spaced apart from each other.

In addition, the anti-fragmentation member may have a shape with the largest width at the central position of the thickness of each anti-fouling member.

In this case, both ends in the width direction of the anti-fouling member may be configured in a round shape.

In addition, the anti-fouling member may be extruded so that both ends of the anti-fouling member in the width direction have a round shape.

Here, the anti-fouling member may be grinded or chamfered so that both ends of the anti-fouling member in the width direction have a round shape.

In addition, the anti-fouling member may be composed of a fiber-reinforced plastic.

In this case, the anti-fouling member may have a Mohs hardness of 5.0 or more.

In addition, the anti-corrosive member may have a bending modulus (Flexural modulus) of 4500 kgf/mm ^{2 or} more.

In this case, the anti-corrosive member may have a flexural strength of 90 kgf/mm ^{2 or} more.

In addition, the optical unit may contain an optical fiber in the loose tube.

Here, the core may have a central tension line disposed at the center thereof, and an optical unit may be provided around the central tension line.

In addition, at least one intervening material having a size corresponding to that of the optical unit around the central tension line and made of polyethylene or polypropylene may be provided.

In this case, the core may include a binding tape for binding the optical unit.

And, the binding tape may be a waterproof tape having a waterproof function.

Here, the core may further include an inner jacket enclosing the at least one optical unit inside the anti-fouling member.

The optical cable according to the present invention is provided with an anti-resistance member having a larger width than thickness and a flat shape, so that it is possible to sufficiently prevent damage to the cable core by teeth such as rodents.

In addition, the optical cable according to the present invention is provided with a flat-shaped anti-fragrance member having a larger width than the thickness, and there is a gap between at least one pair of adjacent anti-radiation members. The cable can be maintained in a circular shape by preventing the distortion of the cable.

In addition, since the protection member constituting the optical cable according to the present invention has a flat structure rather than an arch shape, it is not necessary to design the protection member according to the diameter of the cable, so that the cost of the cable can be lowered.

In addition, the anti-resistance member constituting the optical cable according to the present invention has a larger width than the thickness and is configured to be flat, and the width of each anti-protection member is configured to have the largest shape in the central region in the thickness direction. Since it may be configured in a round shape as a whole, it is possible to minimize the physical interference between the adjacent protection members, thereby minimizing the deviation of the position of the protection member due to bending or twisting of the cable.

In addition, by configuring the width of at least one of the radiation protection members constituting the optical cable according to the present invention differently, it is possible to secure the flexibility of the cable design regardless of the circumferential length according to the diameter change of the cable.

In addition, since the protection member constituting the optical cable according to the present invention is configured in a flat shape, it is easier to manufacture the protection member than when the protection member is configured in an arcuate or arc shape, thereby reducing the cost of the cable.

In addition, since the protection member constituting the optical cable according to the present invention has a flat structure rather than an arch shape, the protection member is in close contact with the core, so there is no lifting phenomenon between the waterproof member and the core, and the structural stability of the cable can be secured. can

In addition, the optical cable according to the present invention replaces the metal protective layer provided inside the conventional optical cable with a fiber-reinforced plastic (FRP) material in order to provide a radiation protection function to sufficiently reduce the weight of the optical cable to provide a large-capacity optical cable for overhead lines. can

In addition, the optical cable according to the present invention can improve the tensile strength of the optical cable compared to the case in which a metal protective layer is provided by applying the central tension wire and the anti-resistance member as a fiber-reinforced plastic (FRP) material.

In addition, since the optical cable according to the present invention does not include a metal composition inside, it satisfies the ADSS (all dielectric self supporting) condition, and the performance as an optical cable for an overhead line installed between a telecommunication pole or a power line pole and a steel tower is improved. can be satisfied

1 shows a cross-sectional view of one embodiment of an optical cable according to the present invention;
2 shows a cross-sectional view of another embodiment of an optical cable according to the present invention.
3 shows a cross-sectional view of another embodiment of an optical cable according to the present invention.
4 shows a cross-sectional view of another embodiment of an optical cable according to the present invention.
5 shows a partially enlarged view of the optical cable shown in FIG.
6 shows a cross-sectional view of another embodiment of an optical cable according to the present invention.
7 shows a cross-sectional view of an optical cable having a conventionally introduced anti-radiation function.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed subject matter may be thorough and complete, and the spirit of the invention may be sufficiently conveyed to those skilled in the art. Like reference numbers refer to like elements throughout.

Fig. 1 shows a cross-sectional view of one embodiment of an optical cable according to the present invention, Fig. 2 shows a cross-sectional view of another embodiment of an optical cable according to the present invention, and Fig. 3 shows a cross-sectional view of another embodiment of an optical cable according to the present invention do.

In order to provide a protection function to the optical cable, the present invention includes a core (C) including at least one optical unit 100 in which a plurality of optical fibers 110 are accommodated; A plurality of radiation protection members 600 arranged side by side to surround the core (C) and having a width (W) greater than a thickness (t) and a flat shape; And it may include an outer jacket 800 surrounding the outside of the plurality of protection members (600).

The present invention relates to an optical cable for processing, and a plurality of optical units 100 may be provided.

A central tension line 200 for reinforcing tensile force may be provided at the center of the optical cable according to the present invention. The central tension line 200 may be made of a material such as fiber reinforced plastic (FRP) to provide sufficient tensile strength.

In the optical cable shown in FIGS. 1 to 3 , at least one optical unit 100 may be provided around the central tension line 200 . The optical unit 100 may include at least one optical fiber 110 therein. In general, the optical unit 100 may use a tight buffer method and a loose tube method in which there is no empty space therein. Since a plurality of optical fibers are accommodated in the unit 100, a loose tube method is applied.

In the optical unit 100 of the optical cable shown in FIGS. 1 to 3 , the six optical fibers 110 and the waterproof member 130 may be accommodated in the loose tube 150 . The loose tube 150 may be made of polybutylene terephthalate or polypropylene, and the waterproof member 130 may be thixotropic compound jelly, waterproof yarn, waterproof powder, or the like. can

And, according to the required communication capacity, the optical cable shown in FIGS. 1 and 2 is provided with two optical units 100 around the central tension line 200, and the optical cable shown in FIG. 3 is the central tension line ( 200) Four optical units 100 are provided around the periphery.

Accordingly, the optical cable shown in FIGS. 1 and 2 may include a total of 12 optical fibers 110 , and the optical cable shown in FIG. 3 may include 24 optical fibers 110 .

In this case, the optical unit 100 is disposed around the central tension line 200, and at least one interposition may be provided in order to maintain the overall circular shape of the cable.

The optical cables shown in FIGS. 1 to 3 are provided with three or one intervening 300, respectively. The interposition may have a diameter corresponding to that of the optical unit 100 and may be made of polyethylene or polypropylene material.

The interposition may not constitute a core as in the embodiment described later in a configuration in which the number may be increased or decreased according to the required communication capacity or may be omitted.

1 to 3, the central tension line 200 is in contact with two and four light units 100, respectively, and is in contact with three and one intervening intervening. And, the light unit 100 or the interposition of the embodiment shown in Figs. 1 to 3 is arranged to be in contact with two adjacent light units 100 or intervening, the center tension line 200 having a circular cross section, the light unit 100 ) and the intervening, it is possible to minimize the movement of the components constituting the core by minimizing the empty space inside the core.

In order for the core to be in contact with the central tension line 200 and the optical unit 100 having a corresponding diameter disposed around the central tension line 200 so that the core does not move around the central tension line 200, It is important to properly determine the diameter of the central tension line 200 .

In this case, when the optical unit 100 and the interposition have diameters corresponding to each other, when the sum of the number of the optical unit 100 and the interposition is 5 or less based on 6, the central tension line If the diameter of 200 is smaller than the diameter of the optical unit 100 or the interposition, and 7 or more, the diameter of the central tension line 200 should be larger than the diameter of the optical unit 100 or the interposition. Of course, the size of the central tension line 200 may be determined within a range that satisfies the contact condition with the central tension line 200 and the contact condition between the adjacent optical units 100 or intervening elements.

A waterproof yarn 400 may be provided in the empty space inside the core. If the waterproof yarn 400 has absorbency, it may be made of various materials.

In the embodiment shown in FIGS. 1 and 3 , the central tension line 200 , the optical unit 100 , and the core C consisting of the interposition may be selectively bound with a binding tape 500 . The binding tape 500 may be a form of a binding member for keeping the core C in a circular shape as a whole and for leveling the mounting surface of the protection member 600 to be described later, and this binding member is not limited to the binding tape. does not The binding tape is preferably a waterproof tape having a waterproof function. Even if the outer sheath is damaged by rodents and moisture penetrates, the waterproof tape has an effect of blocking moisture.

On the other hand, the embodiment shown in FIG. 2 may further include an inner jacket in which the core surrounds the at least one light unit inside the anti-radiation member. That is, the inner jacket 800a may be provided at the outermost portion of the core C. When the inner jacket 800a is provided, there is an effect that can protect the core C once more even when a problem such as damage to the anti-fouling member 600, which will be described later, occurs. The inner jacket 800a may be made of the same material as the outer jacket 800b, which will be described later.

According to the embodiment of the present invention shown in FIGS. 1 to 3 , a plurality of protection members 600 may be disposed on the outside of the binding tape 500 or the inner jacket 800a to surround the core. The protection member 600 is provided to prevent damage by rodents.

Specifically, the plurality of anti-radiation members 600 are arranged to be spirally wrapped along the longitudinal direction of the core (C), and the pitch may be about 300 millimeters (mm) to 1000 millimeters (mm).

1 to 3 , the anti-fouling member 600 may be made of a fiber reinforced plastic (FRP) material having a width w greater than a thickness t and a flat shape. have.

The width W is configured in a flat shape greater than the thickness t, and a plurality of anti-radiation members 600 may be spirally wound side by side on the outer peripheral surface of the core at the same pitch. Here, the flat shape means a flat or flat shape without bending or curving in a specific direction in which the upper and lower surfaces are based on the cross section. However, the flat shape does not mean a perfect plane, etc., and if there is no curvature as a whole and the upper and lower surfaces are flat, it can be viewed as a flat shape.

In the prior art described above with reference to FIG. 7, since the member constituting the protection layer is configured in an arcuate or arc shape, the manufacturing method is complicated, and the cost is increased because the curvature of each protection member must be changed according to the diameter of the cable, but the present invention The anti-radiation member 600 is easy to manufacture and does not require a change in curvature according to the diameter of the cable, thereby reducing the cost of the entire cable.

In addition, among the conventionally introduced technologies, a method such as providing a steel tape or the like inside the outer jacket 800 was used for the anti-corrosion function, but ADSS (All-dielectric) for overhead lines to increase the weight of cables and to be installed together with power lines It is not suitable as a self-supporting cable).

ADSS (All-dielectric self-supporting cable) optical cable is an optical cable for overhead lines installed between a telecommunication pole or a power line pole and a pylon.

Experimentally, in order to secure a sufficient anti-defense function, the anti-resistance member 600 applied to the optical cable according to the present invention has a Mohs hardness of 5.0 or more, a flexural modulus of 4500 kgf/mm ² or more, and a flexural strength (Flexural). strength) was confirmed to be preferably composed of a non-metal material of 90 kgf/mm ^{2 or more.} When the material of the anti-resistance member is made of a material that satisfies the above conditions, it is possible to safely protect the inside of the core by preventing damage by the teeth of rodents that can access the overhead line.

The optical cable according to the present invention provides a sufficient protection function as described above, and as a material of the protection member 600 for implementing the ADSS cable, the protection member 600 made of fiber reinforced plastics (FRP) can be applied. have.

When fiber-reinforced plastics (FRP) are applied as the anti-resistance member 600 , a Mohs hardness of 5.0 or more, a flexural modulus is 4500 kgf/mm ² or more, and a flexural strength) was able to satisfy all the requirements of non-metal material of 90kgf/mm ^{2 or more.}

It is preferable that the protection member 600 is installed without gaps to protect the inside and at the same time keep the cable as circular as possible. Accordingly, the anti-radiation member 600 may be configured in a flat shape, that is, in a flat and long strip shape, and may be installed side by side along the circumferential direction of the core of the cable.

And, each optical unit constituting the ADSS (All-dielectric self-supporting cable) optical cable for the overhead line according to the present invention can accommodate, for example, 6, 12 or 24 optical fibers 110, such A large-capacity optical cable may be configured by providing the optical unit in multiple layers.

1 to 3, the diameter (D1) of the entire cable is expected to be at least about 4.5 millimeters (mm) to a maximum of 30 millimeters (mm), and a gap stably inside the optical cable having this diameter is In order to protect without protection and to maintain a circular shape as much as possible, the width of the anti-fouling member 600 is 1.5 millimeters (mm) to 4.0 millimeters (mm), and the thickness is 0.5 millimeters (mm) to 2.0 millimeters (mm) having a size of It was confirmed that it is preferable.

When the thickness and width of the protection member 600 is smaller, it can be easily damaged by rodent teeth, and when the thickness and width are larger, the protection function can be strengthened, but as an optical cable for overhead lines, the diameter and weight will increase significantly.

An outer jacket 800 may be provided outside the anti-defense layer by the anti-defense member 600 , and the outer jacket 800 may be made of a material such as polyethylene (PE) or high-density polyethylene (HDPE). The thickness of the outer jacket 800 may have a size of about 1.2 millimeters (mm) to 2.5 millimeters (mm).

When the outer jacket 800 is coated on the outer circumferential surface of the anti-fouling member 600, it may be wrapped using a non-woven fabric or the like to prevent lifting of the anti-fouling member 600 and facilitate the operation.

In addition, at least one lip cord 700 for separating the outer jacket 800 during field work may be provided inside the outer jacket 800 .

In addition, since the optical cable according to the present invention is configured in the form of fiber-reinforced plastic for both the central tension line 200 and the anti-resistance member 600 as described above, the optical cable according to the present invention has less weight than an optical cable to which a metal tape or the like is applied for a conventional anti-protection function. can have an improved effect.

4 shows a cross-sectional view of another embodiment of an optical cable according to the present invention. A description that overlaps with the description with reference to FIGS. 1 to 3 will be omitted.

In the embodiment shown in FIGS. 1 to 3 , two and four optical units 100 are provided around a central tension line 200 , and each optical unit 100 accommodates six optical fibers 110 . , is an optical cable equipped with a total of 12 and 24 optical fibers 110 .

The point that 8 optical units 100 shown in FIG. 4 are provided, and 12 optical fibers 110 are provided in each optical unit 100 so that 96 optical fibers 110 are provided and the central tension line 200 There is a difference in that the intervening is not arranged around the periphery, only the optical unit 100 is arranged.

As described above, when the number of the optical units 100 or the entire interposition disposed around the central tension line 200 is 7 or more based on 6, the diameter of the central tension line 200 is the optical unit 100 ) must be larger than the diameter of the central tension line 200 and the optical unit 100, etc. disposed around it can be in close contact without an empty space.

In the example shown in FIG. 4 , since only eight optical units 100 are provided, the diameter of the central tension line 200 must be greater than the diameter of the optical unit 100 so that the empty space inside the core can be minimized. .

In addition, the central tension line 200 of the embodiment shown in FIG. 4 has a polyethylene coating layer 230 on the outside of the fiber-reinforced plastic 210 unlike the central tension line 200 shown in FIGS. 1 to 3 . do.

Therefore, when it is not possible to form a sufficient thickness of the central tension line 200 only with the fiber-reinforced plastic 210, the thickness of the central tension line 200 is reduced by adding a coating layer 230 so that there is no empty space inside the core. can be adjusted

In addition, the protection member 600 can be spirally rolled along the longitudinal direction of the core on the outer circumferential surface of the core to improve the bending properties, and is intended to protect the inside of the cable from damage caused by the teeth of animals such as rodents, so that Even if the thickness is sufficiently secured to provide sufficient rigidity, the gap between the anti-protection members 600 arranged in the longitudinal direction of the core is widened too large, or one of the arranged anti-protection members 600 is pushed up and twisted. If the circular shape of the cable cannot be maintained due to a problem, the original function of the protection member 600 provided in the form of an armor for protecting the core cannot be achieved.

Therefore, in the optical cable according to the present invention, it is necessary to optimally control the interval between the radiation protection members 600 disposed on the outer peripheral surface of the core.

As described above, the width w of the anti-fouling member 600 is 1.5 millimeters (mm) to 4.0 millimeters (mm), and the thickness is determined in the range of 0.5 millimeters (mm) to 2.0 millimeters (mm). Preferably, the number of radiation protection members 600 installed in the cross-sectional direction should be determined according to the capacity of the cable, that is, the number of optical units 100 or the number of optical fibers 110 accommodated in one optical unit 100. do.

Here, the width (w) and the thickness (t) of the anti-fouling member 600 means the maximum value when the width or thickness of one anti-fouling member is not constant. For example, as in the embodiment of the present invention, when both ends of the anti-resistance member 600 in the width direction are configured in a round shape, the anti-protection member 600 has the largest width at the central position of the thickness, so this value is the anti-protection member corresponds to the width (w) of

5 shows a partially enlarged view of the optical cable shown in FIG.

As shown in FIG. 5 , the anti-radiation member 600 may have a flat shape in which a width w is greater than a thickness t, and an end portion in the width direction as a whole may be configured in a curved shape. Accordingly, the width of the anti-radiation member 600 is greatest near the center of the thickness.

That is, each of the upper and lower surfaces of the anti-radiation member 600 in the thickness direction may be flat, and both ends in the width direction may be configured in a round shape.

The method for configuring both ends of the anti-fouling member 600 in the width direction in a round shape is to extrude the anti-fouling member 600 by using a mold having a round shape at both ends in the width direction, or both ends of the anti-fouling member 600 in the width direction. A method of grinding or chamfering may be used to form a round shape.

As described above, the anti-radiation member 600 constituting the optical cable according to the present invention has a larger width than the thickness and is configured to be flat, and the width of each anti-radiation member has the largest shape in the central region in the thickness direction, that is, the Since the shape of both ends can be configured in a round shape as a whole, even when bending or twisting of the cable occurs, by minimizing physical interference such as being caught or caught between adjacent protection members by the sharp edge of the protection member 600 It is possible to minimize the deviation of the position of the protection member.

In addition, the gap between the anti-protection members 600 disposed in the longitudinal direction of the core is widened too large to sufficiently protect the inside of the core, or there is no gap between the anti-protection members 600 arranged at all, so that the cable is prevented from bending. In order to solve the problem that the circular shape of the cable cannot be maintained due to deformation such as one of the members 600 being pushed up and twisted, the present invention provides the following conditions in relation to the size or spacing of the plurality of protection members 600 . configured to satisfy

인 경우, 방서부재(600) 사이의 간격(g)의 총합은 2πR -

로 가정하는 경우, 방서부재(600) 사이의 간격(g)의 총합은 0.1 밀리미터(mm) < 2πR -

< 2.0 밀리미터(mm)을 만족하도록 구성하는 것이 바람직하다.Specifically, in order to prevent the gap between the anti-protection members 600 disposed in the longitudinal direction of the core from widening too large, the number of the anti-protection members 600 is n, and the thickness center of the anti-protection member 600 from the center of the cable. The distance to is R, and the sum of the widths (W) of the plurality of

If , the sum of the spacing (g) between the anti-radiation member 600 is 2πR -

If it is assumed, the sum of the spacing (g) between the anti-fouling member 600 is 0.1 millimeters (mm) < 2πR -

It is preferable to configure to satisfy <2.0 millimeters (mm).

은 각각의 방서부재(600)의 폭의 총합이다. 그리고, 방서부재(600)의 폭이 충분히 작은 경우에는 방서부재(600)의 두께 방향 중심을 통과하는 원호의 길이와 방서부재(600)의 폭은 거의 동일하다고 가정할 수 있으므로, 2πR -

는 각각의 방서부재(600) 폭방향 단부 사이의 간격(g)의 총합으로 볼 수 있다.Here, 2π x R is the radius of R, and the length of the circumference of the circle passing through the center point in the width direction and thickness direction of the radiation member 600,

is the sum of the widths of each of the blocking members 600 . And, when the width of the anti-radiation member 600 is sufficiently small, it can be assumed that the length of the arc passing through the center of the thickness direction of the anti-radiation member 600 and the width of the anti-radiation member 600 are approximately the same, 2πR -

can be viewed as the sum of the spacing (g) between the ends of each of the radiation protection member 600 in the width direction.

Here, the size of the gaps g at the end of each anti-protection member 600 may be uniform, and when the cable is bent or twisted, the size of the gap between specific anti-protection members may be temporarily increased.

Experimentally, the total of the spacing (g) between the protection members 600 must be smaller than this 2.0 millimeters (mm) to protect the inside of the core sufficiently so that the teeth of rodents that are accessible to the optical cable laid on the overhead line do not penetrate. It was confirmed that the cable can be maintained in a circular shape as much as possible without any problems such as being pushed up and twisted in any one of the adjacent anti-resistance members 600 when it is 0.1 millimeter (mm) or more.

In addition, since the anti-resistance member 600 has a flat shape and a gap between the anti-fouling members 600 is secured, the anti-fouling member 600 may be in contact with the core, respectively, and accordingly, there is no lifting phenomenon between the waterproof member and the core, and the cable structural stability can be ensured.

값은 0이 되고, 케이블의 밴딩 또는 비틀림이 발생되는 경우, 방서부재 중 일부가 뒤틀리거나 위치 이탈이 발생될 수 있다. 따라서, 모든 방서부재(600)가 경계영역의 간격 없이 밀착되도록 배치되면 안되고 방서부재(600) 사이의 간격(g)의 총합은 0보다 큰 값이 되도록 방서부재들이 이격되어야 함을 의미한다.And, when all the anti-radiation members 600 are in close contact without a gap in the boundary region, 2πR - the sum of the spacing between the anti-fouling members

The value becomes 0, and when bending or twisting of the cable occurs, some of the anti-resistance members may be twisted or a positional deviation may occur. Therefore, it means that all the anti-fouling members 600 should not be arranged so as to be in close contact without a gap in the boundary region, and the anti-fouling members should be spaced apart so that the sum of the spacing g between the anti-fouling members 600 is greater than zero.

값이 0.1 밀리미터(mm) 이상은 되어야 함을 실험적으로 확인하였으며, 2πR -

는 방서부재(600) 사이의 간격(g)의 총합이 0.1 밀리미터(mm) 이상은 되어야 한다는 의미는 방서부재(600) 사이의 간격(g)의 총합이 최소한 0.1 밀리미터(mm)은 확보되어야 케이블의 밴딩 또는 비틀림이 발생되어도 방서부재의 뒤틀림 또는 위치 이탈을 방지할 수 있다는 의미로 해석될 수 있다.And preferably, the sum of the spacing between the anti-fouling member 2πR -

It was experimentally confirmed that the value should be more than 0.1 millimeter (mm), and 2πR -

means that the sum of the distances (g) between the anti-resistance members 600 should be at least 0.1 millimeters (mm). Even if bending or torsion occurs, it can be interpreted as meaning that it is possible to prevent distortion or displacement of the anti-resistance member.

값이 0.1 밀리미터(mm)보다 작은 0.05 밀리미터(mm)인 경우, 케이블에 약간의 충격 또는 밴딩 등이 가해져도 특정 방서부재(600)가 비틀려 케이블의 원형을 유지하기 어렵고, 방서부재(600) 사이의 간격(g)의 총합인 2πR -

값이 2.0 밀리미터(mm)보다 큰 3.0 밀리미터(mm)이고, 특정 방서부재(600) 사이의 간격(g)이 상대적으로 크게 벌어진 경우, 설치류의 이빨이 특정 방서부재(600) 사이로 침투가 가능하여 코어까지 접근하게 되어 케이블의 충분한 보호가 어렵다는 것을 확인하였다.Therefore, experimentally, the sum of the spacing (g) between the radiation shielding member 600 is 2πR -

If the value is 0.05 millimeters (mm) smaller than 0.1 millimeters (mm), even if a slight impact or banding is applied to the cable, the specific anti-resistance member 600 is twisted and it is difficult to maintain the original shape of the cable, and the anti-resistance member 600 2πR - the sum of the spacing (g) between

If the value is 3.0 millimeters (mm) greater than 2.0 millimeters (mm), and the gap (g) between the specific control members 600 is relatively large, the rodent's teeth can penetrate between the specific control members 600, It was confirmed that it was difficult to adequately protect the cable by approaching the core.

값이 2.0 밀리미터(mm) 보다 작게 구성하기 위해서는 방서부재(600)의 개수와 폭을 결정해야 함을 의미한다.And, the sum of the spacing (g) between the anti-radiation member 600 2πR -

In order to configure the value to be smaller than 2.0 millimeters (mm), it means that the number and width of the anti-fouling member 600 must be determined.

는 방서부재의 폭(Wi)의 총합이므로, 모든 방서부재(600)의 폭이 동일하게 구성될 필요는 없다. 즉, n개의 방서부재를 포함하는 광케이블에서 n-1 개의 방서부재가 3.0 밀리미터(mm)의 폭을 가지고, 나머지 공간의 폭이 3.0 밀리미터(mm)인 경우, 마지막 방서부재의 폭이 3.0 밀리미터(mm)인 경우, 방서부재(600) 사이의 간격(g)의 총합인 2πR -

는 0이므로 케이블의 밴딩시 케이블이 비틀려 올라가는 등의 문제가 발생될 수 있으므로, 마지막 방서부재(600)는 먼저 배치된 n-1 개의 방서부재의 폭인 3.0 밀리미터(mm)보다 작은 2.5 밀리미터(mm)인 폭을 갖는 것을 배치하여 방서부재(600) 사이의 간격(g)의 총합인 2πR -

가 0.5 밀리미터(mm)가 되도록 하여 방서부재(600)의 뒤틀림 등을 해소할 수 있다.and,

Since is the sum of the width Wi of the anti-fouling member, it is not necessary that the width of all the anti-fouling members 600 is configured to be the same. That is, in an optical cable including n anti-radiation members, when n-1 anti-radiation members have a width of 3.0 millimeters (mm) and the width of the remaining space is 3.0 millimeters (mm), the width of the last anti-radiation member is 3.0 millimeters ( mm), which is the sum of the spacing (g) between the anti-radiation members 600, 2πR -

Since is 0, a problem such as twisting of the cable may occur during bending of the cable, so the last protection member 600 is 2.5 mm (mm) smaller than 3.0 mm (mm), which is the width of the n-1 number of protection members disposed first ) by placing a thing having a width of 2πR -

It is possible to eliminate the distortion of the anti-resistance member 600 by making it to be 0.5 millimeters (mm).

가 0.5 밀리미터(mm)가 된다는 의미는 설치류 동물의 이빨로부터 코어를 보호할 정도로 방서부재가 촘촘하게 배치되되, 0.5 밀리미터(mm)의 여유가 n개의 방서부재 사이로 분배되어 케이블의 벤딩의 방향성과 무관하게 방서부재(600)의 비틀림 등을 방지 또는 최소화할 수 있음을 의미한다.In this case, the anti-resistance member 600 is the sum of the gaps (g) 2πR -

is 0.5 millimeter (mm) means that the shielding member is dense enough to protect the core from the teeth of rodents. It means that it is possible to prevent or minimize distortion of the anti-defense member 600 .

Therefore, the plurality of protection members 600 constituting the optical cable 100 according to the present invention can include at least one protection member 600 having a different width, thereby securing the design flexibility of the cable.

And, it is confirmed that the optical cable shown in FIGS. 4 and 5 has a total cable diameter (D2) of only about 13 millimeters (mm) to 14 millimeters (mm) even when 96 optical fibers 110 are accommodated in a loose tube method. did.

6 shows a cross-sectional view of another embodiment of an optical cable according to the present invention. A description that overlaps with the description with reference to FIGS. 1 to 5 will be omitted.

In the embodiment shown in Fig. 6, only 12 optical units 100 in the form of a loose tube without intervening around the central tension line 200 are provided, and 12 optical fibers 110 are provided inside each optical unit 100. A total of 144 optical fibers 110 are provided to enable high-capacity optical communication.

In addition, the central tension line 200 and the optical unit 100 are in contact with each other, and each optical unit 100 is in contact with two adjacent optical units 100 to minimize the empty space therein, and the central tension It can be seen that the diameter of the line 200 is larger than the diameter of the optical unit 100 .

In addition, the optical cable shown in FIG. 6 has a total cable diameter (D3) of 16 millimeters (mm) to 17 millimeters (mm) so that it can be installed for overhead lines, and at the same time there is no metal structure inside. It can be confirmed that all-dielectric self-supporting) conditions and weight conditions can both be satisfied.

In addition, the optical cable according to the present invention described with reference to FIGS. 1 to 6 has a width of 1.5 millimeters (mm) to 4.0 millimeters (mm) on the outside of the core in order to have a radiation protection function, and a thickness of 0.5 millimeters (mm) to 2.0 The method of arranging the anti-fouling member in millimeters (mm) is used. The optical cable having such an anti-radiation layer may be embodied in various types of cables with a total cable diameter ranging from 4.5 millimeters (mm) to 30 millimeters (mm) according to the capacity or number of optical units.

Although the present specification has been described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention without departing from the spirit and scope of the present invention as set forth in the claims described below. will be able to carry out Therefore, if the modified implementation basically includes the elements of the claims of the present invention, all of them should be considered to be included in the technical scope of the present invention.

1: optical cable
100: light unit
200: center tension line
300: intervening
400: waterproof yarn
600: anti-resistance member
700: rip code
800: outer jacket

Claims (21)

a core including at least one optical unit accommodating a plurality of optical fibers;
A plurality of protection members disposed side by side to surround the core, and having a width (W) greater than a thickness (t) and a flat shape; and
Including; an outer jacket surrounding the outside of the plurality of protection members
When the number of the anti-protection member is n, the distance from the center of the cross-section of the core to the center of the thickness of the anti-protection member in the radial direction is R, and the sum of the widths (W) of the plurality of anti-protection members is

If , 2πR -

Values are 0.1 millimeters (mm) < 2πR -

Optical cable, characterized in that it satisfies the range of < 2.0 millimeters (mm). According to claim 1,
The optical cable, characterized in that the width of the protection member is 1.5 millimeters (mm) to 4.0 millimeters (mm), and the thickness is 0.5 millimeters (mm) to 2.0 millimeters (mm). 3. The method of claim 2,
The plurality of protection members are arranged to be spirally wrapped along the longitudinal direction of the core, and the pitch is 300 millimeters (mm) to 1000 millimeters (mm). delete According to claim 1,
The plurality of protection members includes at least one protection member having different widths. According to claim 1,
The optical cable, characterized in that the plurality of protection members are in contact with the core, respectively. According to claim 1,
The plurality of anti-radiation members is an optical cable, characterized in that it comprises a portion in which adjacent anti-radiation members are spaced apart from each other. According to claim 1,
Each of the radiation protection members is an optical cable, characterized in that it has a shape with the largest width at the center position of the thickness. 9. The method of claim 8,
The optical cable, characterized in that the width direction both ends of the protection member is configured in a round shape. 10. The method of claim 9,
The protection member is an optical cable, characterized in that the extruded so that both ends of the width direction of the protection member to have a round shape. 10. The method of claim 9,
The protection member is an optical cable, characterized in that the grinding or chamfering processing so that both ends of the width direction of the protection member are round. According to claim 1,
The protection member is an optical cable, characterized in that composed of fiber-reinforced plastic. According to claim 1,
The protection member is an optical cable, characterized in that the Mohs (Mhos) hardness 5.0 or more. According to claim 1,
The anti-corrosion member has a bending modulus (Flexural modulus) of 4500kgf / mm ² Optical cable, characterized in that more than. According to claim 1,
The protection member is an optical cable, characterized in that the bending strength (Flexural strength) is 90kgf / mm ^{2 or more.} According to claim 1,
The optical unit is an optical cable, characterized in that the optical fiber is accommodated in the loose tube. According to claim 1,
The core is an optical cable, characterized in that the central tension line is arranged in the center, and an optical unit is provided around the central tension line. 18. The method of claim 17,
An optical cable having a size corresponding to the optical unit around the central tension line and having at least one interposition made of polyethylene or polypropylene material. According to claim 1,
The optical cable, characterized in that the core comprises a binding tape for binding the optical unit. 20. The method of claim 19,
The binding tape is an optical cable, characterized in that it is a waterproof tape having a waterproof function. According to claim 1,
The optical cable, characterized in that the core further comprises an inner jacket surrounding the at least one optical unit inside the protection member.

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