CN218824865U

CN218824865U - Layer stranded optical cable with high space utilization rate

Info

Publication number: CN218824865U
Application number: CN202320131953.6U
Authority: CN
Inventors: 孙文雨; 周帆; 孙红光
Original assignee: Fiberhome Telecommunication Technologies Co Ltd
Current assignee: Fiberhome Telecommunication Technologies Co Ltd
Priority date: 2023-01-13
Filing date: 2023-01-13
Publication date: 2023-04-07
Anticipated expiration: 2033-01-13

Abstract

The application relates to a layer stranded optical cable that space utilization is high includes: layer stranded cable core, layer stranded cable core includes: a central light unit having a first optical communication unit disposed therein; a reinforcing layer coated outside the central light unit; a plurality of loose tubes are twisted outside the reinforcing layer, and second optical communication units are arranged in the loose tubes. This application sets up layer stranding cable core into central light unit and combines outside enhancement layer structure, compares in the structure that current central reinforcement combines filler material, when the optical cable intensity was guaranteed to the enhancement layer, central light unit has improved the fine capacity and the space utilization of optical cable, in addition, can install the second optical communication unit different with first optical communication unit function in central light unit, realizes the usage specialization of optical cable, satisfies the user demand of different application occasions.

Description

Layer stranded optical cable with high space utilization rate

Technical Field

The application relates to the technical field of optical cables, in particular to a layer stranded optical cable with high space utilization rate.

Background

The layer-stranded optical cable is a round cable core formed by twisting a plurality of sleeve pipes containing optical fibers around a central reinforcing member, a metal or non-metal reinforcing member is positioned in the center of the optical cable, and loose sleeve pipes containing the optical fibers are arranged around the reinforcing member.

However, as the number of loose tubes of the layer stranded optical cable increases, the diameter of the reinforcement is increased, the diameter of the cable core is increased, and particularly, when the 1+8/1+12 or the multi-layer stranded optical cable is used, the situation that the central aperture of the layer stranded structure is large is encountered, a large space is wasted for filling the reinforcement, and the utilization rate of the optical fiber is low;

with the development of the times, the manufacturing industry of optical fiber cables is more and more developed towards the purpose specification and the high utilization rate of optical fibers, and a series of opportunities and challenges are brought along.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a layer stranded optical cable with high space utilization rate to solve the problems of low space utilization rate and low optical fiber capacity of the layer stranded optical cable in the related technology.

The technical scheme provided by the application is as follows:

the application provides a layer stranded optical cable that space utilization is high includes: layer stranded cable core, layer stranded cable core includes:

a central light unit having a first optical communication unit disposed therein;

a reinforcing layer coated outside the central light unit;

a plurality of loose tubes are twisted outside the reinforcing layer, and a second optical communication unit is arranged in the loose tube.

In some embodiments, the first optical communication unit is an optical fiber, an optical fiber ribbon, a fiber bundle, or an optical cable.

In some embodiments, the second optical communication unit is an optical fiber, an optical fiber ribbon, or an optical fiber bundle.

In some embodiments, the reinforcing layer is made of PBT, PE, FRP or iron.

In some embodiments, the material of the reinforcing layer is PBT or PE, and the reinforcing layer is filled with steel wires.

In some embodiments, the loose tube stranded outside the reinforcing layer is one or more layers.

In some embodiments, the number of loose tubes is greater than or equal to 8.

In some embodiments, the layer-twisted cable core is coated with an outer sheath.

In some embodiments, the outer sheath is made of PE, LSZH or ZRPE.

In some embodiments, a filling material is further disposed between the outer sheath and the loose tube, and the filling material includes one or more of factice, water-blocking yarn, water-blocking tape, and aramid yarn.

The beneficial effect that technical scheme that this application provided brought includes: this application sets up layer stranding cable core into central light unit and combines outside enhancement layer structure, compares in the structure that current central reinforcement combines filler material, when the optical cable intensity was guaranteed to the enhancement layer, central light unit has improved the fine capacity and the space utilization of optical cable, in addition, can install the first optical communication unit different with second optical communication unit function in central light unit, realizes the usage specialization of optical cable, satisfies the user demand of different application occasions.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a cross-sectional view of a space-efficient layer-stranded optical cable provided in an embodiment of the present application;

FIG. 2 is a cross-sectional view of a central light unit and a reinforcing layer provided in an embodiment of the present application;

FIG. 3 is a cross-sectional view of a central light unit and a reinforcing layer according to another embodiment of the present application.

In the figure: 1. a central light unit; 11. a first optical communication unit; 2. a reinforcing layer; 22. an inner protective layer; 3. loosening the sleeve; 4. an outer jacket.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in fig. 1, an embodiment of the present application provides a layer stranded optical cable with high space utilization, including: layer-stranding cable core, layer-stranding cable core includes:

a central light unit 1, wherein a first optical communication unit 11 is arranged in the central light unit 1;

a reinforcing layer 2 which is wrapped outside the central light unit 1;

a plurality of loose tubes 3 are twisted outside the reinforcing layer 2, and a second optical communication unit (not shown in the figure) is arranged in each loose tube 3.

The layer-stranded cable core is of a structure that the central optical unit 1 is combined with the outer reinforcing layer 2, compared with the structure that the existing central reinforcing part is combined with the filling material, the reinforcing layer 2 provides tensile force for the optical cable, the optical cable is guaranteed to have certain strength, the central optical unit 1 improves the fiber capacity of the optical cable, and the gap space between the existing layer-stranded optical cable central reinforcing part and the loose sleeve is fully utilized; in addition, a first optical communication unit with different functions from a second optical communication unit can be arranged in the central optical unit 1, so that the purpose specialization of the optical cable is realized, the use requirements of different application occasions are met, the characteristic of large central gap of the existing 1+8 and upper-layer stranded cable core structure is effectively improved, and the optical cable has the advantages of simple structure, easiness in laying and high central space utilization rate.

In a preferred embodiment, the diameter of the central light unit 1 is ≧ 3mm.

In some embodiments, the first optical communication unit 11 is an optical fiber, an optical fiber ribbon, an optical fiber bundle, or an optical cable.

The first optical fiber communication unit 11 may be reasonably designed according to actual needs, and is not particularly limited herein, and for example, the first optical fiber communication unit may be: central tube bundled optical cables, spare optical fibers, sensing optical fibers, monitoring optical cables, and the like.

As shown in fig. 2, if the first optical fiber communication unit uses a central bundle optical cable, the central bundle optical cable includes an inner protection layer 22 and an optical fiber sleeved in the inner protection layer 22. Further, the inner protection layer 22 is used to protect the optical fiber, and the material of the inner protection layer 22 includes, but is not limited to, PBT (polybutylene terephthalate) and the like.

In order to improve the stability and buffer resistance of the optical fiber, it is preferable to fill a fiber paste between the optical fibers.

The first optical communication unit may be set to be the same as the second optical communication unit to improve the optical fiber capacity of the optical cable, or may be set to be different from the second optical communication unit to realize the multi-use of the optical cable.

In particular, the optical fiber used in the present embodiment is selected from colored optical fibers, which are primarily convenient for identifying the optical fiber during the production and construction use of the optical cable.

In some embodiments, the material of the reinforcing layer 2 is PBT, PE, FRP or iron.

Reinforcing layer 2 is used for bearing the tensile load when the optical cable lays in this application, rationally selects the material of reinforcing layer 2, can bring very big influence to the performance of optical cable.

Polybutylene terephthalate (PBT) is a milky translucent to opaque, semi-crystalline thermoplastic polyester. Has high heat resistance, toughness, fatigue resistance, self-lubrication and low friction coefficient. Because of these excellent properties, they find wide application in the field of optical cable manufacture.

Polyethylene (PE) is a thermoplastic resin obtained by polymerizing ethylene. Has the advantages of corrosion resistance, heat resistance, high strength and good flexibility. Because of these excellent properties, they find wide application in the field of optical cable manufacture.

FRP (Fiber Reinforced Polymer) is a novel composite material which is formed by compounding high-strength glass fibers and a resin matrix and has both structural and functional properties. The FRP is used as a designable composite material, an FRP product with excellent corrosion resistance can be obtained by selecting proper fibers and resins, optimizing the design and adopting advanced manufacturing and forming processes, and the FRP composite material has the characteristics that: light weight, high strength, high corrosion resistance and easy forming. The method is widely applied to high-tech fields such as industry, civil use and the like, and particularly widely applied to the field of optical cable manufacture.

In the actual use process, the most suitable reinforcing layer material can be selected according to the use environment and the application.

In some embodiments, as shown in fig. 2, the material of the reinforcing layer 2 is PBT or PE, and the reinforcing layer 2 is filled with steel wires 21.

If the material of the reinforcing layer 2 is PBT or PE, in order to improve the tensile strength of the reinforcing layer 2, a steel wire 21 is provided in the reinforcing layer 2.

The thickness of the reinforcing layer 2 can be calculated according to the tensile force value required in practice, and further, if the material of the reinforcing layer 2 is PBT or PE, the thickness of the reinforcing layer 2 is preferably more than 0.5mm.

Specifically, the number of the steel wires 21 can be reasonably designed according to actual needs.

In some embodiments, the loose tube 3, which is stranded outside the reinforcement layer 2, is one or more layers.

Specifically, the loose tube 3 may be stranded to the reinforcing layer 2 in an SZ or ZS manner.

Further, the number of optical fibers in each loose tube can be set according to actual needs, and is not particularly limited herein, and may be, for example, 1 to 12.

In some embodiments, the number of loose tubes is greater than or equal to 8.

In order to ensure that the center of the cable core has enough space to install the central optical unit 1, if the number of the stranded layers of the loose tubes is one, the number of the loose tubes is preferably more than or equal to 8; if the number of the twisted layers of the loose tubes is two or more, the number of the first layer of loose tubes adjacent to the central light unit is preferably not less than 6.

Further, the number of the first layer of loose tubes adjacent to the central light unit 1 may be 8, 12, etc.

In some embodiments, the layer-stranded cable core is surrounded by an outer jacket 4.

The outer protective layer 4 mainly plays a role in mechanical protection and moisture-proof sealing of the cable core, so that internal elements are prevented from being affected by external mechanical action and environmental conditions.

In some embodiments, the outer jacket 4 is PE, LSZH, or ZRPE.

As the main components of the plastic are high molecular polymers which are generally inflammable, and the hazard of fire is very large, the method generally adopted for inflaming retarding of the existing plastic is to add flame retardant into the high molecular polymers, most of the flame retardant contains halogen, a large amount of smoke and halogen hydride gas can be released during combustion, and the smoke and the halogen hydride gas are toxic to human bodies, have strong suffocation effect and can also generate corrosion effect on equipment. The flame retardance of the low-smoke halogen-free plastic (LSZH) is generally improved by adding inorganic hydroxide and the like, the LSZH does not contain halogen, has higher safety and environmental protection, and has the performance meeting the requirements of IEC92-359 standard on thermoplastic materials.

Polyethylene is a thermoplastic resin material obtained by polymerizing ethylene monomers. The polyethylene is non-toxic, easy to store and smooth in hand feeling, has excellent low-temperature resistance, chemical properties and stability, but the polyethylene material has the defect of easy combustion, and the flame retardant polyethylene (ZRPE) is added to enable the polyethylene material to have higher fire resistance and safety. The currently commonly used flame retardants mainly include halogen flame retardants, halogen-free flame retardants, mineral fillers, intumescent flame retardants, and the like.

In the actual use process, the most suitable outer sheath material can be selected according to the use environment and the application.

In some embodiments, a filling material is further disposed between the outer sheath 4 and the loose tube 3, and the filling material includes one or more of ointment, water-blocking yarn, water-blocking tape, and aramid yarn.

The ointment is prepared by dispersing one (or more) gelatinizer(s) in base oil to form a viscous gel-like substance, and adding antioxidant and other additives (such as antiseptic, viscosity regulator, and hydrogen scavenger) to improve its service performance. The gelling agent, in which the liquid base oil is thickened to form a non-flowable gel-state substance and is thixotropic, plays a very important role in the manufacture and use of the fiber = ointment. Gelling agents are classified into inorganic and organic types, including fatty acid salts, organobentonite, fumed silica, paraffin hydrocarbons, and high molecular copolymers (e.g., hydrogenated copolymers of styrene and rubber), and the like.

The water-blocking yarn can rapidly absorb water and swell to form gel, so that the space of the water channel of the optical cable is blocked, and the purpose of blocking water is achieved. In addition, the water-blocking yarn does not contain oily substances, the time required for the subsequent preparation can be greatly shortened, and the preparation of a wipe, a solvent and a cleaner is not required. In addition, the water-blocking yarn has very light weight, so that the optical cable can be greatly lightened.

The water-blocking tape plays roles of sealing, water proofing, moisture insulation and buffering protection in the optical cable. The water blocking function of the water blocking tape is mainly characterized in that the contained water-swellable high-water-absorptivity material rapidly swells when meeting water to form large-volume jelly to fill a water seepage channel of the cable, so that water is prevented from continuously permeating and diffusing, the water blocking purpose is realized, and further, the water blocking tape is longitudinally wrapped on the loose tube.

The aramid yarn has the water-blocking function, and the contained water-swellable high-water-absorption material can be rapidly swelled with water to form a large-volume jelly which is filled in a water seepage channel of the cable, so that the water is prevented from continuously permeating and diffusing, and the purpose of blocking water is realized.

Further, the water-blocking tape is one of a single-sided water-blocking tape, a double-sided water-blocking tape, a coated single-sided water-blocking tape or a coated double-sided water-blocking tape.

The single-sided water-blocking tape, the double-sided water-blocking tape, the coated single-sided water-blocking tape and the coated double-sided water-blocking tape are divided according to the thickness, and the proper water-blocking tape can be selected according to the requirement in the actual use process, so that the optical cable has the best performance.

The present application is further illustrated by the following specific examples.

Example 1

As shown in fig. 1-2, this embodiment 1 provides a layer-stranded optical cable with a high space utilization rate, including a layer-stranded cable core and an outer sheath 4, where the outer sheath 4 is coated on an outer surface of the layer-stranded cable core;

the layer-stranded cable core comprises a central optical unit 1, the central optical unit 1 comprises an inner protective layer 22, the inner protective layer 22 is made of PBT materials, an optical fiber bundle consisting of 6 colored optical fibers is sleeved in the inner protective layer 22, and fiber paste is filled between the colored optical fibers;

the reinforcing layer 2 is coated outside the inner protective layer 22, the reinforcing layer 2 is made of PE materials, and steel wires 21 are arranged in the reinforcing layer 2;

12 loose tubes 3 are twisted outside the reinforcing layer 2, and optical fiber bundles are arranged in the loose tubes 3.

Example 2

As shown in fig. 1 and 3, this embodiment 2 provides a layer-stranded optical cable with high space utilization, including a layer-stranded cable core and an outer sheath 4, where the outer sheath 4 is coated on an outer surface of the layer-stranded cable core;

the layer-stranded cable core comprises a central optical unit 1, and the central optical unit 1 is a monitoring optical cable;

the reinforcing layer 2 is coated on the outer surface of the central light unit 1, and the reinforcing layer 2 is made of glass Fiber Reinforced Plastic (FRP);

12 loose tubes 3 are stranded outside the reinforcing layer 2, and optical fiber bundles are arranged in the loose tubes 3.

To sum up, the layer-stranded optical cable with high space utilization rate that this application provided sets up the layer-stranded cable core as central optical unit and combines outside enhancement layer structure, compare in the structure that current central reinforcer combines filler material, when the optical cable intensity is guaranteed to the enhancement layer, central optical unit has improved the fiber capacity and the space utilization of optical cable, make the optical cable have higher fiber density, and simple structure, lay easily, in addition, can install the second optical communication unit different with first optical communication unit function in central optical unit, realize the usage specialization of optical cable, satisfy the user demand of different application occasions.

In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A layer stranded optical cable with high space utilization rate is characterized by comprising: layer stranded cable core, layer stranded cable core includes:

a central light unit (1), wherein a first optical communication unit (11) is arranged in the central light unit (1);

a reinforcing layer (2) which covers the central light unit (1);

a plurality of loose tubes (3) are twisted outside the reinforcing layer (2), and second optical communication units are arranged in the loose tubes (3).

2. The space-efficient layer-stranded optical cable of claim 1, wherein the first optical communication unit is an optical fiber, an optical fiber ribbon, an optical fiber bundle, or an optical cable.

3. The space-efficient stranded optical cable of claim 1, wherein said second optical communication unit is an optical fiber, an optical fiber ribbon, or an optical fiber bundle.

4. The layer stranded optical cable with high space utilization according to claim 1, wherein the material of the reinforcing layer (2) is PBT, PE, FRP or iron.

5. The space-efficient layer stranded optical cable according to claim 4, wherein the material of the reinforcing layer (2) is PBT or PE, and the reinforcing layer (2) is filled with steel wires (21).

6. The space-efficient layer stranded cable according to claim 1, wherein the loose tube (3) stranded outside the reinforcing layer (2) is one or more layers.

7. The space-efficient layer-stranded optical cable according to claim 1, wherein the number of the loose tubes is not less than 8.

8. The space-efficient layer-stranded optical cable according to claim 1, wherein the layer-stranded cable core is coated with an outer sheath (4).

9. The space-efficient layer stranded optical cable of claim 8, wherein the outer jacket (4) is made of PE, LSZH or ZRPE.

10. The space-efficient layer-stranded optical cable according to claim 8, wherein a filling material is further disposed between the outer sheath (4) and the loose tube (3), and the filling material comprises one or more of ointment, water-blocking yarn, water-blocking tape, and aramid yarn.