CN217385920U

CN217385920U - Optical cable

Info

Publication number: CN217385920U
Application number: CN202221487687.2U
Authority: CN
Inventors: 俞桦; 王醒东
Original assignee: Futong Jiashan Fiber Optic Cable Technology Co ltd
Current assignee: Futong Jiashan Fiber Optic Cable Technology Co ltd
Priority date: 2022-06-14
Filing date: 2022-06-14
Publication date: 2022-09-06
Anticipated expiration: 2032-06-14

Abstract

The utility model discloses an optical cable, including heart yearn, inner sheath and oversheath, the optical cable axle center has the through-hole along length direction, and the heart yearn evenly spaced inlays sheath circumference including establishing, the oversheath extrusion molding is in the inner sheath outside, and the oversheath is inside to inlay and is equipped with a plurality of high-elastic rubber sticks, and high-elastic rubber stick is the arc of outside hunch-up, and is a plurality of at the inside even interval distribution of optical cable circumference of following of oversheath high-elastic rubber stick is in on the isodiametric virtual circle that uses the optical cable axle center as the dot. The utility model discloses a reasonable structural design avoids using metal armor area, has both guaranteed resistance to compression, the shock resistance of optical cable, makes it have the characteristics of matter light, flexible again, needn't use jumbo size dish utensil when becoming the dish, helps reducing the cost of transportation.

Description

Optical cable

Technical Field

The utility model belongs to the optical cable field especially relates to an optical cable.

Background

The optical cable is a medium for transmitting optical signals, and is formed by extruding a sheath outside an optical fiber bundle consisting of a single optical fiber or a plurality of optical fibers and an optical fiber ribbon. In 2021, the domestic optical fiber cable market is in line with the rising demand and the bottom-to-bottom price rebound under the background of 5G and gigabit optical network scale deployment. The data of the national statistical office shows that the cumulative output of optical cables is 3.22 hundred million cores kilometers all the year round in 2021, and the cumulative increase of the optical cable output is 11.6 percent. It is expected that the demand of optical cables in China will still maintain 2.9% of annual composite growth rate in 2021-2026 under the construction plan of 5G and gigabit optical networks.

Currently, the mainstream optical cables mainly include GYTA (inner aluminum armor) and GYTS (inner steel armor) optical cables, and the structures of the GYTA (inner aluminum armor) and the GYTS (inner steel armor) optical cables are the same. The metal armor layer is used for improving the compression resistance, the tensile resistance and the moisture resistance of the optical cable, particularly in regions with severe environments such as mines and seabed, the optical cable can bear higher pressure, and the cable core sometimes even needs to be wrapped with multiple layers of metal strips, namely, the purpose of improving the compression resistance of the optical cable is achieved at the cost of improving the cost and the weight.

Current GYTA and GYTS optical cable weight is great, and the existence of metal armor layer makes the optical cable be inflexible, needs the dish utensil of great radius when the wire winding becomes the dish, leads to the length of coiling on the unit space shorter, has increased the cost of transportation.

SUMMERY OF THE UTILITY MODEL

The utility model provides a to above-mentioned problem, provide an optical cable, solved current optical cable and passed through metal armor layer increase resistance to compression, torsional strength, the optical cable is not flexible, need the dish utensil of great size when coiling into the dish, cost of transportation increases the scheduling problem.

The utility model adopts the following technical scheme:

the utility model provides an optical cable, includes heart yearn, inner sheath and oversheath, the optical cable axle center has the through-hole along length direction, and the heart yearn is even at the interval inlays sheath circumference including establishing, the sheath outside including the oversheath extrusion molding, the oversheath is inside to inlay and is equipped with a plurality of high-elastic rubber sticks, and high-elastic rubber stick is the arc of outside hunch-up, and is inside along the even interval distribution of optical cable circumference in the outer sheath, and is a plurality of high-elastic rubber stick is in on the isodiametric virtual circle with the optical cable axle center as the dot.

Optionally, the number of the core wires is 3-5.

Optionally, the core wire is composed of a bundle tube and an optical fiber therein, and a water blocking material is filled between the optical fiber and the bundle tube.

Optionally, the rubber rod is made of a silicone rubber material.

Optionally, the rubber rod is arranged between every two core wires.

Optionally, a cavity is formed in the inner side of each rubber rod in the outer sheath, and the cavities are arc-shaped and are evenly distributed at intervals along the circumferential direction.

Optionally, the cavity is filled with ultra-light clay.

Optionally, the outer side of each core wire in the inner sheath is provided with an arc-shaped protection strip, and the protection strips are coated on the outer side of the core wires.

Optionally, the protective strip is made of rigid plastic.

Optionally, a bundle tube bundle composed of a plurality of bundle tubes is arranged in the through hole.

The utility model has the advantages that:

(1) the use of a metal armor layer is avoided, and the defect that the existing metal armored optical cable is not easy to bend is overcome.

(2) Inlay at the overcoat and be equipped with a plurality of high-elastic rubber sticks, utilize the elasticity of rubber stick as main atress unit, combine cavity buffering etc. simultaneously, through reasonable structural design, compromise the compressive property of optical cable.

(3) The optical cable has the characteristics of light weight and easy bending, and is beneficial to reducing the transportation cost.

Description of the drawings:

fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the present invention when stressed;

the figures are numbered:

the cable comprises a core wire 1, an inner sheath 2, an outer sheath 3, a through hole 4, a high-elastic rubber rod 5, a cavity 6, ultralight clay 7, a protective strip 8 and a bundle tube bundle 9.

The specific implementation mode is as follows:

the invention is described in further detail below with reference to specific embodiments and drawings. Those of ordinary skill in the art will be able to implement the invention based on these descriptions. Moreover, references to embodiments in the following description are generally only to some embodiments, and not all embodiments, of the invention. Therefore, all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In the description of the present invention, "a number" means at least two, such as two, three, etc.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "abutted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Examples

An optical cable as shown in fig. 1, including heart yearn 1, inner sheath 2 and oversheath 3, the oversheath extrusion molding is in the outer side of inner sheath, inner sheath axle center department has through-hole 4 along length direction, the heart yearn inlays the circumference of establishing inner sheath, even interval sets up, the heart yearn comprises beam tube and the optic fibre in it, it has water blocking material to fill between optic fibre and the beam tube, the inside even interval distribution of optical cable circumference of following of oversheath is inlayed and is equipped with a plurality of high-elastic rubber stick 5, high-elastic rubber stick is outwards hunch-up form, for example circular-arc or V-arrangement, be circular-arc in this embodiment, a plurality of high-elastic rubber stick are in the isodiametric virtual circle that uses the optical cable axle center as the dot.

The inner sheath and the outer sheath are made of conventional sheath materials, PE is adopted in the embodiment, and in actual production, the inner sheath and the outer sheath can be made of the same material and integrally formed.

When the optical cable is pressed, the high-elasticity rubber rod plays a main role in resisting and dispersing external force, certain buffering can be achieved on the pressure through self deformation due to the characteristics of materials of the outer sheath and the inner sheath, and enough allowance is reserved for deformation of the optical cable through the through hole in the axis of the inner sheath. In view of the role of the high-elastic rubber rod, in this embodiment, the rubber rod is made of a silicone rubber material.

The number of the core wires is set to 3-5, and in the present embodiment, the number of the core wires is set to 5. The core wire is arranged too little, and the waste of communication capacity is large; if set up too much, the distance is nearer between two liang heart yearns, and when the optical cable pressurized, the pressurized heart yearn formed the extrusion to the heart yearn of both sides easily, probably leads to the heart yearn damage.

The rubber rod can be arranged in the outer sheath in various ways, for example, the outer side of each core wire is provided with one rubber rod, the core wires are positioned near the middle point of the rubber rods in the circumferential direction of the optical cable, namely, each rubber rod completely covers the core wires on the inner side of the rubber rod, and the rubber rod can also be arranged between every two core wires. In this embodiment, the latter setting mode is adopted in particular, namely the rubber rod is arranged between two core wires, and the end points at the two ends of the rubber rod are not more than the connecting line between the center of the core wire at the end and the axis of the optical cable. The arrangement mode has the advantages that when the rubber rod is used as a main stress component, the rubber rod extrudes the core wires inwards, and the core wires at two ends can deform and move inwards the optical cable and also can deform and move towards two sides along the circumferential direction of the optical cable; if the rubber rod completely covers the core wires on the inner side of the rubber rod, the core wires on the inner side of the rubber rod can only move inwards when the rubber rod is pressed, and the effect of buffering the pressure through deformation is not as good as that of buffering the pressure between every two core wires.

After the rubber stick atress, the power inwards conducts to the inner sheath, for reducing the internal conduction of external force as far as, the inboard of every rubber stick in the outer sheath all is equipped with cavity 6, the cavity is circular-arcly, along the even interval distribution of inner sheath outside circumference, and the circumference length of cavity is less than rubber stick length, and the rubber stick forms the full cladding to the cavity promptly.

In order to prevent the cavity from instantaneously collapsing and deforming under strong pressure or impact force, further, the cavity is filled with ultra-light clay 7. The ultra-light clay has large expansion volume and small specific gravity, the weight after drying is 1/4 before drying, the ultra-light clay is extremely light and not easy to break, the ultra-light clay has air holes after drying, the volume is gradually reduced through slow loss of air when being compressed, and the ultra-light clay is restored again through absorbing the air after the external force is removed. The filling of the ultralight clay can support the cavity, and when the optical cable is subjected to strong impact force, air can be slowly released and absorbed through the optical cable, so that the core wire is prevented from being damaged by the strong impact force or the strong pressure.

In addition, the outside of every heart yearn still is equipped with circular-arc protection strip 8 in the inner sheath, the cladding of protection strip is in the heart yearn outside, and the protection strip is by the rigid plastic preparation. When external acting force action direction just right the heart yearn, stereoplasm plastics can be with the inside propelling movement of heart yearn, through the deformation absorption external acting force of through-hole.

In order to avoid too fast or too large deformation of the through hole, a bundle tube bundle 9 formed by a plurality of bundle tubes can be filled in the through hole, the bundle tube bundle is arranged along the axial direction of the optical cable, the bundle tubes are of hollow structures, have certain elasticity and are easy to bend, the flexibility of the optical cable is ensured, and the compression resistance and the impact resistance are improved.

The utility model discloses a reasonable structural design avoids using metal armor area, has both guaranteed resistance to compression, the shock resistance of optical cable, makes it have the characteristics that matter is light, flexible again, needn't use jumbo size dish utensil when the one-tenth dish, helps reducing the cost of transportation.

When the optical cable is subjected to pressure F1 shown in FIG. 2, the lower end of the optical cable is also subjected to upward supporting force F2 with the same size and direction as the supporting surface, and the specific stress condition is that the pressure F1 at the upper end is conducted inwards, so that the two opposite ends of the rubber rods at the two sides downwards extrude the protective strips, the protective strips further push the core wires to move towards the axis of the optical cable, and the force from top to bottom is absorbed through the deformation of the through hole at the axis; meanwhile, the supporting force F2 at the lower end is also extruded upwards and is firstly transmitted to the middle of the rubber rod, the rubber rod has high elasticity, the middle of the rubber rod is sunken inwards, the two ends of the rubber rod tilt outwards to absorb the resisting external force, the inwards sunken part extrudes the cavity, the inward transmission of the force F2 is further reduced through the deformation of the cavity and the slow release-absorption of air by the ultralight clay, and finally, all the external force is absorbed through the deformation of the through holes to avoid the damage of the core wire.

Claims

1. An optical cable comprises a core wire, an inner sheath and an outer sheath, and is characterized in that,

optical cable axle center has the through-hole along length direction, and sheath circumference including the even interval of heart yearn inlays and establishes, the sheath outside including the oversheath extrusion molding, the inside of oversheath inlays and is equipped with a plurality of high-elastic rubber sticks, and high-elastic rubber stick is the arc of outside hunch-up, and is a plurality of at the inside equal footpath virtual circle that uses the optical cable axle center as the dot of edge of oversheath along the even interval distribution of optical cable circumference inside, high-elastic rubber stick.

2. An optical cable according to claim 1, wherein the number of said core wires is 3 to 5.

3. An optical cable according to claim 2, wherein said core wire is composed of a bundle tube and optical fibers therein, and a water blocking material is filled between the optical fibers and the bundle tube.

4. An optical cable as claimed in claim 1, wherein the rubber rod is made of a silicone rubber material.

5. An optical cable according to claim 1, wherein the rubber rod is provided between two core wires.

6. An optical cable according to claim 5, wherein each rubber rod in the outer sheath has a cavity on its inner side, the cavity having a shape of a circular arc and being uniformly spaced in the circumferential direction.

7. An optical cable according to claim 6, wherein the cavity is filled with ultra-light clay.

8. An optical cable according to claim 1, wherein a circular arc-shaped protective strip is provided on an outer side of each core wire in the inner sheath, and the protective strip covers the outer side of the core wire.

9. An optical cable as claimed in claim 8, wherein the protective strip is made of a rigid plastic.

10. An optical cable as claimed in claim 1, wherein a bundle of a plurality of bundles is provided in said through hole.