CN210666131U

CN210666131U - Branch optical cable

Info

Publication number: CN210666131U
Application number: CN201922014023.9U
Authority: CN
Inventors: 王飞; 翟长伟; 汪波
Original assignee: Shenzhen Shijia Optical Fiber Cable Technology Co ltd
Current assignee: Shenzhen Shijia Optical Fiber Cable Technology Co ltd
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-06-02
Anticipated expiration: 2029-11-20

Abstract

The utility model provides a branch optical cable includes central reinforcement, sub-optical cable layer, mica tape, inner sheath and oversheath in proper order by inboard to the outside, and the material of inner sheath is the pottery polyolefin, and the material of oversheath is polyurethane, and the sub-optical cable layer comprises around in the central reinforcement outside a plurality of sub-optical cable, and the sub-optical cable includes sub-optical cable sheath and tight cover optic fibre, and tight cover optic fibre is located in the sub-optical cable sheath. Through this example implementation, make the utility model discloses the optical cable lays in narrow and small space, and can solve current optical cable and form the fuse and expose the optical cable inner structure and cause the problem of equipment signal interruption etc. when the conflagration.

Description

Branch optical cable

Technical Field

The utility model relates to the field of communications, especially, relate to a branch optical cable.

Background

With the development of society, modern human lives and works increasingly depend on intellectualization, but the application results of the society cannot be separated from the hardware erection of a modern information network, and the hardware erection of the information network cannot be separated from the erection and the use of a communication optical cable.

Based on the space limitation on the building to and the rapid inflation of information-based demand, lead to being used for satisfying the space that the cable erect at elevartor shaft etc. and littleer and more, to this kind of scene, the weak and big drawbacks such as frictional force of the bending resistance of traditional big core number branch optical cable are unfavorable for branch optical cable and lay in narrow and small space. Moreover, when a fire disaster happens to the outer sheath of the traditional branch optical cable, the outer sheath can help the fire source to form a flame path from bottom to top, and the effect is similar to that of a fuse; simultaneously, when the conflagration appeared, the sheath material can burn totally and carbonization becomes the ash in the short time, directly exposes inner structure, and present fire control means is still with water extinguishment is many at present, directly causes signal interruption and circuit damage when suffering high pressure to strike, not only causes the degree of difficulty for the work of putting out a fire of fire control, still can additionally increase the loss.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects and deficiencies of the prior art, the utility model provides a branch optical cable which is convenient for lay in a narrow space and prevents the formation of a fuse cable when a fire disaster from causing the interruption of equipment signals.

The utility model adopts the technical proposal that: the utility model provides a branch optical cable, includes central reinforcement, sub-optical cable layer, mica tape, inner sheath and oversheath in proper order by inboard to the outside, the material of inner sheath is the pottery polyolefin, the material of oversheath is polyurethane, sub-optical cable layer by a plurality of sub-optical cable around in the central reinforcement outside constitutes, sub-optical cable includes sub-optical cable sheath and tight cover optic fibre, tight cover optic fibre is located in the sub-optical cable sheath.

Preferably, the tight-buffered optical fiber comprises a bare optical fiber, a coloring layer, an aramid yarn and a tight-buffered layer in sequence from the inner side to the outer side.

Preferably, the material of the colored layer is acrylate.

Preferably, the aramid yarns are 200-440D in number of 2-4.

Preferably, the tight-buffered optical fiber has an outer diameter of 0.85 to 0.95mm and a number of 1 to 12.

Preferably, the sub-cable jacket inner surface is provided with a first ripcord.

Preferably, a second mooring rope is arranged between the mica tape and the inner sheath.

Preferably, the outer surface of the central reinforcing member is provided with a plastic coating.

The utility model has the advantages that: compared with the prior art, the utility model discloses the oversheath has fire-retardant fire-resistant and wear-resisting effect, is convenient for make the utility model discloses the optical cable is laid in narrow and small space, and can prevent to help the intensity of a fire that rises when the conflagration. And the utility model discloses the inner sheath can effectively keep apart high temperature flame to the infringement of inside material, delays the pyrolysis of inside material, guarantees the effective operation of optical cable under the conflagration condition, and then can solve current optical cable and form the fuse and expose the optical cable inner structure and cause the problem of equipment signal interruption etc. when the conflagration.

Drawings

Fig. 1 is a cross-sectional view of the present invention.

Fig. 2 is a cross-sectional view of a tight buffered fiber cross-section according to an embodiment of the present invention.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some sub-embodiments of the present invention. Based on the embodiments in the present invention, other embodiments obtained by the skilled in the art without creative work all belong to the protection scope of the present invention.

Referring to fig. 1, a branched optical cable according to an embodiment of the present invention includes, in order from inside to outside, a central reinforcement 1, a sub-optical cable layer, a mica tape 3, an inner sheath 4, and an outer sheath 5, where the inner sheath 4 is made of ceramic polyolefin, and the outer sheath 5 is made of polyurethane, where the outer sheath 5 made of polyurethane has flame-retardant, fire-resistant, and wear-resistant effects according to material characteristics, and the number of bending times can reach more than ten thousand times, and its lower friction coefficient and softer material characteristics facilitate the laying of the optical cable in a narrow space, and prevent the boosting fire during a fire; inner sheath 4 of ceramic polyolefin material, temperature or flame more than 650 ℃ according to the material, can generate complete ceramic form casing rapidly, and not ftracture, do not drip, and, this ceramic polyolefin material still has excellent electrical isolation and the fabulous characteristic of insulating against heat the effect of oxygen, and then make inner sheath 4 can effectively keep apart the infringement of high temperature flame to inside material, delay the thermolysis of inside material, guarantee the effective operation of optical cable under the conflagration condition, and then can solve current optical cable and form the problem that leads the fire cable and expose the optical cable inner structure and cause equipment signal to break off etc. when the conflagration. In addition, the mica tape 3 does not contain crystal water, has a melting point as high as 1375 ℃, is large in safety margin, excellent in high-temperature resistance and very excellent in heat insulation effect, can further effectively prevent heat from diffusing to the inside, delays thermal decomposition of internal materials, and does not have a combustion-supporting effect.

Specifically, in order to increase the utility model discloses optical cable overall structure's compactness, the sub-optical cable layer by a plurality of sub-optical cables 2 around in the 1 outside of central reinforcement constitutes, and for the compactness of structure, a plurality of sub-optical cables 2 strand around central reinforcement 1. The sub-optical cable 2 comprises a sub-optical cable sheath 22 and tight-buffered optical fibers 21, and the tight-buffered optical fibers 21 are arranged in the sub-optical cable sheath 22. Preferably, referring to fig. 2, in an embodiment, the tight-buffered optical fiber 21 includes a bare optical fiber 211, a colored layer 212, an aramid yarn 213, and a tight-buffered layer 214 in sequence from the inside to the outside. The bare fiber 211 can adopt models such as G652D, G657A1, G657A2, G657B3, G654E, OM2, OM3, OM4, OM4+, OM5 and the like; the coloring layer 212 may be made of acrylate, and the color may be blue, orange, green, brown, gray, white, red, black, yellow, purple, pink, cyan, etc., which plays a role in protecting the bare fiber 211 and distinguishing the bare fiber 211; the aramid yarn 213 has excellent performances of ultrahigh strength, high modulus, high temperature resistance, good buffering property and the like, the strength of the aramid yarn 213 is 5-6 times that of a steel wire, the toughness of the aramid yarn is 2 times that of the steel wire, and the aramid yarn is not decomposed or melted at a temperature of 560 ℃, so that a single tightly sleeved optical fiber 21 can meet the tensile resistance of at least 50 newtons, the tensile resistance is at least improved by 45 newtons compared with a common 0.9mm tightly sleeved optical fiber without the aramid yarn 213, the tensile resistance of the single tightly sleeved optical fiber 21 is greatly improved, the service life of the single tightly sleeved optical fiber 21 is prolonged, and the internal structure can be effectively protected; the tight-buffered layer 214 can be made of nylon 6 (PA 6), polydodecalactam (PA 12), thermoplastic polyester elastomer (TPEE), etc., and can be blue, orange, green, brown, gray, etc. for distinguishing the bare fibers.

Specifically, in some embodiments, in order to further effectively block the heat from diffusing into the interior, the mica tape 3 is made by using mica paper made of synthetic mica as a main material and adhering glass cloth to both surfaces with an adhesive.

In some embodiments, the aramid yarn 213 is of a type of 200-440D, and is present in an amount of 2-4, in order to optimize the tensile properties of the tight-buffered optical fiber 21 and the overall structure of the tight-buffered optical fiber 21. However, the outer surface of the coloring layer 212 is optimally coated with 3 aramid yarns 213, so that the aramid yarns 213 with high strength can play a role in tensile strength and buffering, and the internal structure can be effectively protected.

In some embodiments, in order to effectively reduce the outer diameter of the sub-cable 2, so as to reduce the outer diameter of the optical cable of the present invention, each of the tight buffered optical fibers 21 has a smaller outer diameter, which is 0.85-0.95mm, and the number of the tight buffered optical fibers is 1-12. And when the number of tight-jacketed optical fibers 21 is 12, the outer diameter of the sub-optical cable 2 is about 5.6mm, which is far lower than the outer diameter of the sub-optical cable 11.0-12.0mm in the traditional structure, so that the problems of large outer diameter and the like of the traditional branch optical cable with large core number can be effectively solved.

In some embodiments, to avoid the constructor from using a sharp tool to strip the cable, scratch the internal structure and facilitate one to strip the sub-cable jacket 22, the inner surface of the sub-cable jacket 22 is provided with a first stripping cable 23 so that one pulls the first stripping cable 23 towards the outside of the sub-cable jacket 22 to strip the sub-cable jacket 22.

In some embodiments, a second opening rope 6 is disposed between the mica tape 3 and the inner sheath 4 in order to avoid scratching the internal structure and facilitating people to open the structure except the mica tape 3 when the constructor uses a sharp tool to open the rope. Therefore, people can pull the second mooring rope 6 towards the outer side of the outer sheath 22 to peel off the inner sheath 4 and the outer sheath 5, and the internal structure is exposed, so that the construction and the use of people are facilitated.

In some embodiments, the outer surface of the central strength member 1 is provided with a plastic coating 11 in order to stabilize the adjacent structures and round the entire cable structure. The material of the plastic coating layer 11 is not limited to any one of LSZH (low smoke zero halogen), PE (polyethylene), and the like.

The above embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. But rather, obvious variations and modifications may be made without departing from the spirit of the invention.

Claims

1. A branch optical cable, comprising: the optical fiber cable comprises a central reinforcement, a sub-optical cable layer, a mica tape, an inner sheath and an outer sheath in sequence from the inner side to the outer side, wherein the inner sheath is made of ceramic polyolefin, the outer sheath is made of polyurethane, the sub-optical cable layer is formed by surrounding a plurality of sub-optical cables on the outer side of the central reinforcement, the sub-optical cables comprise sub-optical cable sheaths and tight-jacketed optical fibers, and the tight-jacketed optical fibers are arranged in the sub-optical cable sheaths.

2. A branch cable according to claim 1, wherein: the tight-buffered optical fiber sequentially comprises a bare optical fiber, a coloring layer, aramid yarn and a tight-buffered layer from the inner side to the outer side.

3. A branch cable according to claim 2, wherein: the coloring layer is made of acrylate.

4. A branch cable according to claim 2, wherein: the aramid yarns are 200-440D in number, and the number of the aramid yarns is 2-4.

5. A branch cable according to claim 1 or 2, wherein: the outer diameter of the tight-buffered optical fiber is 0.85-0.95mm, and the number of the tight-buffered optical fibers is 1-12.

6. A branch cable according to claim 1, wherein: and a first mooring rope is arranged on the inner surface of the sub-optical cable jacket.

7. A branch cable according to claim 1, wherein: and a second mooring rope is arranged between the mica tape and the inner sheath.

8. A branch cable according to claim 1, wherein: the outer surface of the central reinforcing piece is provided with a plastic coating.