CN218886250U

CN218886250U - Optical cable

Info

Publication number: CN218886250U
Application number: CN202223388455.4U
Authority: CN
Inventors: 罗锂; 周华; 缪威玮; 朱鹏宇; 缪小明; 姜成成; 顾旭东
Original assignee: Jiangsu Zhongtian Technology Co Ltd
Current assignee: Jiangsu Zhongtian Technology Co Ltd
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-04-18
Anticipated expiration: 2032-12-16

Abstract

The utility model relates to the technical field of communication cables, and provides an optical cable which comprises a fiber core, a first reinforced layer, an inner sheath, a second reinforced layer and an outer sheath; the fiber core, the first reinforcing layer, the inner sheath, the second reinforcing layer and the outer sheath are sequentially arranged from inside to outside; the first reinforcing layer and the second reinforcing layer respectively comprise reinforcing belts, the reinforcing belts corresponding to the first reinforcing layer are spirally wound on the peripheral wall of the fiber core along a first rotating direction, and the reinforcing belts corresponding to the second reinforcing layer are spirally wound on the peripheral wall of the inner sheath along a second rotating direction; wherein, the first rotating direction and the second rotating direction are opposite in direction. The utility model discloses not only can solve the optical cable and carry out the problem that tensile properties is not enough when laying outdoors, satisfy the optical cable bending and the torsion performance index of introducing when the use of registering one's residence moreover.

Description

Optical cable

Technical Field

The utility model relates to a communication cable technical field especially relates to an optical cable.

Background

Optical fiber cables (optical fiber cables) are manufactured to meet optical, mechanical, or environmental performance specifications by utilizing one or more optical fibers disposed in a surrounding jacket as the transmission medium to implement telecommunication cables used individually or in groups.

In practical application, the existing optical cable used for indoor introduction usually adopts a butterfly-shaped sheath with a built-in suspension wire, the optical cable has poor tensile property and is difficult to meet the requirements of bending and torsion properties of the optical cable when the optical cable is used in a home, and a fiber core in the optical cable is easy to be stressed in laying and running processes, so that the transmission performance of the optical cable is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides an optical cable for it is poor to have tensile properties to solve current optical cable, is difficult to satisfy the problem of the crooked and torsional properties demand of optical cable when the use of registering one's residence.

The utility model provides an optical cable, include: the fiber core, the first reinforcing layer, the inner sheath, the second reinforcing layer and the outer sheath;

the fiber core, the first reinforcing layer, the inner sheath, the second reinforcing layer and the outer sheath are sequentially arranged from inside to outside;

the first reinforcing layer and the second reinforcing layer respectively comprise reinforcing belts, the reinforcing belts corresponding to the first reinforcing layer are spirally wound on the peripheral wall of the fiber core along a first rotating direction, and the reinforcing belts corresponding to the second reinforcing layer are spirally wound on the peripheral wall of the inner sheath along a second rotating direction;

wherein the first and second directions of rotation are opposite.

According to the utility model provides a pair of optical cable, the strengthening band includes the aramid yarn.

According to the utility model provides an optical cable, optical cable still includes first reinforcement and second reinforcement;

the first reinforcing part and the second reinforcing part are both arranged in the outer sheath and extend along the extension direction of the fiber core; the first and second strength members are at a 180 ° angle relative to a center of the core.

According to the utility model provides a pair of optical cable, first reinforcement with among the second reinforcement at least one includes glass fiber reinforced plastic pole and epoxy composite bed, the epoxy composite bed cladding in the perisporium of glass fiber reinforced plastic pole.

According to the utility model provides a pair of optical cable, first reinforcement with among the second reinforcement tensile and bending strength of at least one of them is greater than or equal to 1600MPa, tensile and bending elastic modulus is greater than or equal to 100GPa, elongation at break is less than or equal to 2%.

According to the utility model provides an optical cable, the optical cable still includes first tear rope and second tear rope;

the first tearing rope and the second tearing rope are arranged in the second reinforcing layer; in a cross-section of the fiber optic cable, a line connecting centers of the first ripcord and the second ripcord intersects a line connecting centers of the first strength member and the second strength member.

According to the utility model provides an optical cable, the linear density of at least one among the first tear rope and the second tear rope is no less than 333tex, tensile strength is no less than 150N, elongation at break is no less than 12%, softening point is no less than 238 ℃, melting point is no less than 265 ℃;

and/or at least one of the first rip cord and the second rip cord comprises aramid yarn or polyester yarn twisted as one body.

According to the utility model provides an optical cable, the fiber core includes microbeam tube and optic fibre; the optical fiber is arranged in the microbeam tube, and the first reinforcing layer is arranged on the peripheral wall of the microbeam tube. According to the utility model provides an optical cable, the micro-beam tube comprises any one of a thermoplastic polyester elastomer micro-beam tube, a low-smoke halogen-free flame-retardant polyolefin micro-beam tube, a polyvinyl chloride micro-beam tube and a polycarbonate micro-beam tube; or the number of the optical fibers is 1-12 cores.

According to the utility model provides a pair of optical cable, the inner sheath with at least one among the oversheath includes low smoke and zero halogen flame retardant polyolefin sheath.

The utility model provides an optical cable, through with the fibre core, first enhancement layer, the inner sheath, second enhancement layer and oversheath are from interior toward laying in proper order outward, and set up the strengthening band that first enhancement layer and second enhancement layer correspond and strand along opposite soon, can be according to mutually supporting of first enhancement layer and second enhancement layer, between reinforcing fibre core and the inner sheath, and the joint strength between inner sheath and the oversheath, not only can solve the problem that the tensile properties is not enough when the optical cable carries out outdoor laying, and the crooked and the torsional properties index of the optical cable of introducing when using of registering one's residence have been satisfied.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for the embodiments or the prior art descriptions, and obviously, the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic cross-sectional structure diagram of an optical cable provided by the present invention;

reference numerals:

11. a core; 111. a microbeam tube; 112. an optical fiber; 12. an inner sheath; 13. an outer sheath; 14. a first reinforcing layer; 15. a second reinforcing layer; 16. a first reinforcement; 17. a second reinforcement; 161. a fiberglass reinforced plastic rod; 162. an epoxy resin composite layer; 18. a first tear cord; 19. a second tear string.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The optical cable provided by the embodiment of the present invention is described in detail by referring to fig. 1 through a specific embodiment and an application scenario thereof.

As shown in fig. 1, the present embodiment provides an optical cable including: a core 11, a first reinforcing layer 14, an inner jacket 12, a second reinforcing layer 15, and an outer jacket 13.

Further, the fiber core 11, the first reinforcement layer 14, the inner jacket 12, the second reinforcement layer 15 and the outer jacket 13 are sequentially arranged from inside to outside; the first reinforcing layer 14 and the second reinforcing layer 15 both comprise reinforcing belts, the reinforcing belt corresponding to the first reinforcing layer 14 is spirally wound on the peripheral wall of the fiber core 11 along a first rotating direction, and the reinforcing belt corresponding to the second reinforcing layer 15 is spirally wound on the peripheral wall of the inner sheath 12 along a second rotating direction; wherein, the first rotating direction and the second rotating direction are opposite in direction.

It will be appreciated that the core 11, the first reinforcement layer 14, the inner jacket 12, the second reinforcement layer 15 and the outer jacket 13 of this embodiment are coaxially arranged.

The reinforcing belt of the embodiment can adopt aramid yarn and other fiber belts with certain tensile strength. When the reinforcing tape corresponding to the first reinforcing layer 14 is twisted, the reinforcing tape may be spirally wound around the circumferential wall of the core 11 in the clockwise direction, and when the reinforcing tape corresponding to the second reinforcing layer 15 is twisted, the reinforcing tape may be spirally wound around the circumferential wall of the inner jacket 12 in the counterclockwise direction.

Thus, the optical cable of the embodiment sequentially lays the fiber core 11, the first reinforcing layer 14, the inner sheath 12, the second reinforcing layer 15 and the outer sheath 13 from inside to outside, and the reinforcing belts corresponding to the first reinforcing layer 14 and the second reinforcing layer 15 are arranged to be twisted along opposite rotation directions, so that the problem of insufficient tensile property when the optical cable is laid outdoors can be solved, and the bending and torsion performance indexes of the introduced optical cable when the optical cable is used indoors can be met according to the mutual matching of the first reinforcing layer 14 and the second reinforcing layer 15 and the combination strength between the fiber core 11 and the inner sheath 12 and between the inner sheath 12 and the outer sheath 13.

It should be noted here that both the inner sheath 12 and the outer sheath 13 of the present embodiment may be manufactured by extrusion molding. Wherein, when carrying out the extrusion molding of inner sheath 12, double thread screw rod can be chooseed for use to this embodiment for the sheath material that inner sheath 12 corresponds has great area of contact between the zone of heating of extruding machine and the double thread screw rod, thereby ensures the plastify time of inner sheath 12, and this is favorable to guaranteeing the surperficial integrity of inner sheath 12 after the extrusion molding, reduces the external diameter of inner sheath 12 and undulantly.

In some embodiments, to enhance the tensile properties of the cable, the cable of this embodiment further includes a first strength member 16 and a second strength member 17.

The first reinforcing member 16 and the second reinforcing member 17 may be made of a material having good tensile and bending strength and elastic modulus. Alternatively, the first reinforcing member 16 and the second reinforcing member 17 may employ a steel wire, a plastic rod, or the like, which is not particularly limited.

Further, the first reinforcing member 16 and the second reinforcing member 17 of the present embodiment are both disposed in the outer sheath 13 and extend in the extending direction of the core 11; the first and

second strength members

16 and 17 are at an angle of 180 ° with respect to the center of the core 11.

Thus, the present embodiment can enhance the tensile property of the optical cable by incorporating the first strength member 16 and the second strength member 17 in the outer jacket 13.

Meanwhile, in the present embodiment, by providing the first strength member 16 and the second strength member 17 at an angle of 180 ° with respect to the central axis of the core 11, the first strength member 16 and the second strength member 17 can be arranged side by side on opposite sides of the optical cable, so that when the optical cable is bent, the deformation states of the first strength member 16 and the second strength member 17 are the same, and neither the first strength member 16 nor the second strength member 17 is separated from the outer jacket 13, which enables the optical cable to achieve better bending and twisting performance.

In some embodiments, as shown in fig. 1, at least one of the first stiffener 16 and the second stiffener 17 of the present embodiment includes a glass fiber reinforced plastic rod 161 and an epoxy composite layer 162, and the epoxy composite layer 162 is wrapped around the peripheral wall of the glass fiber reinforced plastic rod 161.

Specifically, the glass Fiber Reinforced Plastic rod 161 of the present embodiment can be understood as a rod body made of Fiber Reinforced composite (Fiber Reinforced Polymer/Plastic, FRP for short). The physical parameters of the fiber reinforced composite material are specifically as follows: the density is 2.05-2.25 g/cm ³ The tensile and bending strength is more than or equal to 1100MPa, the tensile and bending elastic modulus is more than or equal to 60GPa, and the elongation at break is less than or equal to 3.5 percent.

For this reason, in the present embodiment, by providing the epoxy resin composite layer 162 on the peripheral wall of the glass fiber reinforced plastic rod 161, it is ensured that the glass fiber reinforced plastic rod 161 and the outer sheath 13 are tightly integrated, so that the optical cable can withstand a large tensile force.

Alternatively, each of the first and second reinforcing

members

16 and 17 of the present embodiment may be configured to include a glass fiber reinforced plastic rod 161 and an epoxy resin composite layer 162. Based on such an arrangement structure, it is possible to ensure that the tensile and bending strength of at least one of the first reinforcement 16 and the second reinforcement 17 of the present embodiment is not less than 1600MPa, the tensile and bending elastic modulus is not less than 100GPa, and the elongation at break is not more than 2%.

It should be noted here that the epoxy resin composite layer 162 of the present embodiment may be coated on the peripheral wall of the glass fiber reinforced plastic rod 161 with high modulus epoxy resin.

When the high modulus epoxy resin is coated, the high modulus epoxy resin can be cured based on the illumination environment of the LED light source. Compared with the curing of the high-modulus epoxy resin by using a mercury lamp light source, the LED light source has the advantages of lower energy consumption and higher illumination intensity, so that the curing effect of the high-modulus epoxy resin is better.

So, after high modulus epoxy forms the coating through the solidification, compare in the coating material of traditional low smoke and zero halogen flame retardant polyolefin (LSZH for short), polyvinyl chloride (PVC for short) material, the viscosity between the epoxy composite bed 162 and the glass fiber reinforced plastic pole 161 of this embodiment is bigger, and the combination between epoxy composite bed 162 and the oversheath 13 is inseparabler, can effectively promote the tensile properties of first reinforcement 16 and second reinforcement 17.

In some embodiments, as shown in fig. 1, the fiber optic cable of the present embodiment further includes a first ripcord 18 and a second ripcord 19.

The first tearing rope 18 and the second tearing rope 19 are both arranged in the second reinforcing layer 15; in cross-section of the cable, the line connecting the centers of first ripcord 18 and second ripcord 19 intersects the line connecting the centers of first strength member 16 and second strength member 17.

Specifically, since the outer sheath 13 is provided with the first reinforcing member 16 and the second reinforcing member 17, the structural strength of the outer sheath is enhanced, in the embodiment, by setting the central connecting line of the first tearing rope 18 and the second tearing rope 19 to intersect with the central connecting line of the first reinforcing member 16 and the second reinforcing member 17, the worker can conveniently peel the outer sheath 13 from the outer side of the inner sheath 12 by manually pulling the first tearing rope 18 and the second tearing rope 19, the integrity of the inner sheath 12 can be ensured, and the cable laying at home is also facilitated.

Wherein, in the cross section of the optical cable, the central angle of the first tearing rope 18 and the second tearing rope 19 relative to the fiber core 11 can be 90-180 degrees.

In some examples, the present embodiment may allow at least one of the first ripcord 18 and the second ripcord 19 to have a linear density of 333tex or more, a tensile strength of 150N or more, an elongation at break of 12 or more, a softening point of 238 or more, and a melting point of 265 or more by providing the first ripcord 18 and the second ripcord 19 as a composite structure including the glass fiber reinforced plastic rod 161 and the epoxy resin composite layer 162.

Meanwhile, at least one of the first and

second ripcords

18 and 19 of the present embodiment includes aramid yarn or polyester yarn twisted as one body.

Optionally, the first tearing rope 18 and the second tearing rope 19 of the present embodiment may be twisted together by aramid yarn.

Based on the solution of the above embodiment, as shown in fig. 1, the core 11 of the present embodiment includes a micro-beam tube 111 and an optical fiber 112; the optical fiber 112 is built in the micro-bundle tube 111, and the first reinforcing layer 14 is provided on the peripheral wall of the micro-bundle tube 111.

Specifically, the micro-beam tube 111 of the present embodiment can bear a larger portion of stress to the optical fiber 112 therein when being stressed, thereby achieving effective protection of the optical fiber 112.

According to the material of the microbeam tube 111, the microbeam tube 111 of the present embodiment includes any one of a thermoplastic polyester elastomer microbeam tube, a low-smoke halogen-free flame-retardant polyolefin microbeam tube, a polyvinyl chloride microbeam tube, and a polycarbonate microbeam tube.

Alternatively, the micro-bundle tube 111 of the present embodiment is made of Thermoplastic Polyester Elastomer (TPEE) material to be formed into a Thermoplastic Polyester Elastomer micro-bundle tube. In this case, the density of the micro-beam tube 111 is usually 0.78 to 1.3g/cm ³ The tensile strength is usually 13-22MPa, and the breaking elongation is 200-240%.

Meanwhile, the optical fibers 112 of the present embodiment are provided in the number of 1 to 12 cores. For example, the number of the optical fibers 112 arranged may be specifically 4 to 5 cores.

When the number of the optical fibers 112 is two or more, different optical fibers 112 are distinguished by coloring, and the optical fibers 112 are usually arranged in the form of SZ twist or S twist in the micro-bundle tube 111.

In addition, the optical fiber 112 of the present embodiment may be a single mode optical fiber, and the size of the optical fiber 112 may be nominally 250 μm, or 200 μm and 180 μm.

Based on the solution of the above embodiment, as shown in fig. 1, at least one of the inner sheath 12 and the outer sheath 13 of the present embodiment includes a low smoke, zero halogen and flame retardant polyolefin sheath.

Specifically, the inner sheath 12 and the outer sheath 13 of this embodiment may both be made of Low Smoke Zero Halogen flame retardant polyolefin (Low Smoke Zero Halogen, LSZH for short), and the Low Smoke Zero Halogen flame retardant polyolefin material has good flame retardant property, high thermoplasticity, small Smoke release amount during combustion, and lower content of harmful substances such as lead and mercury in Smoke, so that the optical cable of this embodiment can meet the flame retardant requirement during indoor use.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, 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; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. An optical cable, comprising: the fiber core, the first reinforcing layer, the inner sheath, the second reinforcing layer and the outer sheath;

wherein the first and second directions of rotation are opposite.

2. The fiber optic cable of claim 1, wherein the reinforcing tape comprises aramid yarn.

3. The fiber optic cable of claim 1, further comprising a first strength member and a second strength member;

4. The fiber optic cable of claim 3, wherein at least one of the first strength component and the second strength component includes a fiberglass reinforced plastic rod and an epoxy composite layer that is wrapped around a peripheral wall of the fiberglass reinforced plastic rod.

5. The fiber optic cable of claim 3, wherein at least one of the first strength component and the second strength component has a tensile and flexural strength of 1600MPa or greater, a tensile and flexural modulus of elasticity of 100GPa or greater, and an elongation at break of 2% or less.

6. The fiber optic cable of claim 3, further comprising a first ripcord and a second ripcord;

7. The optical cable of claim 6, wherein at least one of the first ripcord and the second ripcord has a linear density of 333tex or more, a tensile strength of 150N or more, an elongation at break of 12% or more, a softening point of 238 ℃ or more, and a melting point of 265 ℃ or more;

8. The fiber optic cable of any one of claims 1-7, wherein the core comprises a micro-bundle tube and an optical fiber; the optical fiber is arranged in the microbeam tube, and the first reinforcing layer is arranged on the peripheral wall of the microbeam tube.

9. The optical cable of claim 8, wherein the microbeam tube comprises any of a thermoplastic polyester elastomer microbeam tube, a low smoke, zero halogen, flame retardant polyolefin microbeam tube, a polyvinyl chloride microbeam tube, and a polycarbonate microbeam tube;

or the number of the optical fibers is 1-12 cores.

10. The fiber optic cable of claims 1-7, wherein at least one of the inner and outer jackets comprises a low smoke, zero halogen, flame retardant polyolefin jacket.