CN114153038A

CN114153038A - Easily lay high density optical cable

Info

Publication number: CN114153038A
Application number: CN202111314095.0A
Authority: CN
Inventors: 丰波; 阎浩; 刘爱华; 刘喆驰; 郭凯; 熊胜明; 孙琦; 姜焕元
Original assignee: Yangtze Optical Fibre and Cable Co Ltd
Current assignee: Yangtze Optical Fibre and Cable Co Ltd
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2022-03-08
Anticipated expiration: 2041-11-08
Also published as: CN114153038B

Abstract

The invention relates to an easily laid high-density optical cable which comprises a layer-stranded cable core and an outer sheath covering the cable core, and is characterized in that a water-resisting layer is wound outside the cable core, the outer sheath is covered outside the water-resisting layer, lubricating blocks protruding outwards are arranged on the outer surface of the outer sheath at intervals, and each lubricating block comprises paraffin, epoxy resin, glycerol epoxy resin, silicon nitride, molybdenum disulfide and 1-hexyl-3-methylimidazolium hexafluorophosphate ionic liquid. The optical fiber cable is reasonable and compact in structural arrangement, the optical fiber density of the optical cable with large core number is improved by adopting the optical fiber ribbon which can be curled and the thin water-blocking material, the optical fiber capacity of the optical cable is high, the volume is small, the weight is light, the air blowing laying is convenient, and the pipeline resource is saved; the outer sheath is provided with the lubricating block, so that the friction coefficient between the optical cable and the pipeline can be reduced, and the air-blowing laying performance of the optical cable is further improved.

Description

Easily lay high density optical cable

Technical Field

The invention relates to an easily-laid high-density optical cable, and belongs to the technical field of optical communication transmission.

Background

Along with the rise of labor cost, the optical cable structure which is convenient to construct, easy to lay and convenient to maintain is favored by operators. The construction is convenient, the finger sheath is easy to peel, the water-blocking material is clean, the sleeve is easy to peel, the air blowing performance is better, the air blowing distance is longer and the like in air blowing construction. The maintenance-convenient type means that the optical cable to be maintained can be quickly identified in a dense pipeline. On the other hand, with the gradual popularization of the 5G technology, the communication capacity can be increased explosively, corresponding pipeline resources can be more and more tense, and the high-density optical cable with the same core number has the characteristics of large core number, small volume, light weight and the like, so that the pipeline utilization rate can be improved on the premise of guaranteeing the communication capacity. The high-density optical cable easy to construct and lay has certain advantages in application scenes such as data centers and comprehensive pipe galleries. However, the existing large-core optical cable still has the problems of small fiber capacity, large volume and unsatisfactory laying performance.

Disclosure of Invention

The invention aims to solve the technical problem of providing the high-density optical cable which is convenient to construct, high in optical fiber density and easy to lay aiming at the defects in the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: the cable comprises a layer-stranded cable core and an outer sheath for covering the cable core, and is characterized in that a water-blocking layer is wound outside the cable core, the outer sheath is covered outside the water-blocking layer, lubricating blocks which protrude outwards are arranged on the outer surface of the outer sheath at intervals, and each lubricating block comprises paraffin, epoxy resin, glycerol epoxy resin, silicon nitride, molybdenum disulfide and 1-hexyl-3-methylimidazolium hexafluorophosphate ionic liquid.

According to the scheme, the lubricating blocks are arranged at intervals along the circumferential direction or/and the axial direction, and the thickness of the protrusions is 0.2-0.5 mm.

According to the scheme, the lubricating block comprises the following components in parts by weight: 10-15% of epoxy resin, 15-20% of glycerin epoxy resin, 5-8% of silicon nitride, 6-10% of molybdenum disulfide, 10-15% of 1-hexyl-3-methylimidazolium hexafluorophosphate ionic liquid and the balance of paraffin.

According to the scheme, the shape of the lubricating block is rectangular, circular, oval or other polygons.

According to the scheme, the layer-stranded cable core comprises a non-metal center reinforcing part, a thin flexible loose tube is stranded on the periphery of the non-metal center reinforcing part, the tearing force of the thin flexible loose tube is less than or equal to 20N, and an optical fiber ribbon capable of transversely curling is laid in the thin flexible loose tube.

According to the scheme, the anti-adhesion 0.10mm PT water-blocking tape or 0.10mm cross-linking water-blocking tape is adopted for the water-blocking layer wrapped outside the cable core.

According to the scheme, dry water-blocking materials are filled among the loose tubes in the cable core, the dry water-blocking materials are filled in the loose tubes, and the water-blocking materials are water-blocking powder or water-blocking yarns.

According to the scheme, the water-blocking tying yarn with high shrinkage rate is wound outside the water-blocking layer, and the outer surface of the outer sheath is provided with the convex lines corresponding to the tying yarn.

According to the scheme, the cable opening rope is arranged in the outer sheath, and the cable opening groove is formed in the outer surface of the outer sheath corresponding to the cable opening rope.

According to the scheme, the outer sheath is an HDPE outer sheath with a friction coefficient of 0.10 and hardness of 62 HA.

The invention has the beneficial effects that: 1. the optical fiber cable has the advantages that the structure is reasonable and compact, the optical fiber density of the optical cable with large core number is improved by adopting the optical fiber ribbon which can be curled and the thin water-blocking material, the optical fiber capacity of the optical cable is high, the volume is small, the weight is light, the air blowing laying is convenient, and the pipeline resource is saved; 2. the lubricating block is arranged on the outer sheath, so that the friction coefficient between the optical cable and the pipeline can be reduced, the air-blowing laying performance of the optical cable is further improved, when the air-blowing laying distance is long and the surface temperature of the outer sheath is raised to 65 degrees by friction, the lubricating block is melted to form a moving oil film, the lubricating effect is further improved, the air-blowing performance is improved, and the air-blowing laying distance is further increased; 3. according to the invention, the cable opening groove of the cable opening rope and the thin flexible loose tube which is easy to open and strip are arranged, and the full-dry optical cable structure is arranged, so that the construction splicing of the optical cable is more convenient, and the construction efficiency is further improved.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention.

Fig. 2 is a radial cross-sectional profile block diagram of one embodiment of the present invention.

Detailed Description

The invention is further explained with reference to the drawings and the embodiments.

The cable comprises a layer-stranded cable core and an outer sheath for coating the cable core, wherein the layer-stranded cable core comprises a non-metal central reinforcing part 101, 6 thin flexible loose tubes 103 are stranded on the periphery of the non-metal central reinforcing part, the tearing force of the thin flexible loose tubes is less than or equal to 20N, and the loose tubes can be easily peeled off by hands. A plurality of optical fiber ribbons 102 which can be transversely curled are laid in the thin flexible loose tube to reduce gaps between the optical fiber ribbons and the loose tube and improve the optical fiber density by 10-15%, dry water-blocking materials are filled in the loose tube, the dry water-blocking materials are filled among the loose tubes in the cable core, and the water-blocking materials are water-blocking powder or water-blocking yarns. The cable core is wrapped with a water-blocking layer 104, the water-blocking layer adopts an ultrathin anti-adhesion 0.10mm PT water-blocking tape, a water-blocking binding yarn 105 with high winding shrinkage rate outside the water-blocking layer is bundled and fixed, and raised grains 108 corresponding to the binding yarn are formed on the outer surface of the outer sheath, so that the thickness of the outer sheath can be reduced, the weight of the optical cable is reduced, and the air blowing performance is improved. The outer sheath is coated outside the water-blocking layer, and the outer sheath is made of HDPE, HAs the hardness of 62HA and the friction coefficient of 0.10. The outer surface of the outer sheath is provided with outwards protruding lubricating blocks 110 at intervals, the lubricating blocks are arranged at intervals along the circumferential direction and the axial direction, the lubricating blocks can be uniformly distributed at intervals of 60 degrees or 90 degrees along the circumferential direction, the circumferential interval distance is 20-50 mm, and the protruding thickness of the lubricating blocks is 0.3 mm. The lubricating block comprises paraffin, epoxy resin, glycerol epoxy resin, silicon nitride, molybdenum disulfide and 1-hexyl-3-methylimidazole hexafluorophosphate ionic liquid, and the lubricating block comprises the following components in parts by weight: 33% of paraffin, 10% of epoxy resin, 15% of glycerol epoxy resin, 7% of silicon nitride, 25% of molybdenum disulfide and 10% of 1-hexyl-3-methylimidazolium hexafluorophosphate ionic liquid. In addition, the outer sheath is internally provided with a cable opening 106, the outer surface of the outer sheath is correspondingly provided with a cable opening groove 109, and the cable opening groove can be symmetrically arranged at two sides of the outer sheath.

Claims

1. An optical cable easy to lay and high in density comprises a layer-stranded cable core and an outer sheath covering the cable core, and is characterized in that a water resisting layer is wound outside the cable core, the outer sheath is covered outside the water resisting layer, lubricating blocks protruding outwards are arranged on the outer surface of the outer sheath at intervals, and each lubricating block comprises paraffin, epoxy resin, glycerol epoxy resin, silicon nitride, molybdenum disulfide and 1-hexyl-3-methylimidazolium hexafluorophosphate ionic liquid.

2. An easily laid high density optical cable as claimed in claim 1 wherein said lubricating blocks are circumferentially and/or axially spaced and have a protrusion thickness of 0.2 to 0.5 mm.

3. An easily laid high density optical cable as claimed in claim 1 or 2 wherein said lubricating block comprises by weight: 10-15% of epoxy resin, 15-20% of glycerin epoxy resin, 5-8% of silicon nitride, 6-10% of molybdenum disulfide, 10-15% of 1-hexyl-3-methylimidazolium hexafluorophosphate ionic liquid and the balance of paraffin.

4. An easily laid high density optical cable as claimed in claim 1 or 2 wherein said lubricating block is rectangular, circular, oval or other polygonal shape.

5. An easily laid high density optical cable as claimed in claim 1 or 2 wherein said layer stranded cable core comprises a non-metallic central strength member, a thin flexible loose tube stranded around the non-metallic central strength member, said thin flexible loose tube having a tearing force of 20N or less, and a transversely crimpable optical fiber ribbon disposed within the thin flexible loose tube.

6. The easily laid high density optical cable according to claim 1 or 2, wherein the water blocking layer wrapped around the core is an anti-adhesion 0.10mm PT water blocking tape or a 0.10mm cross-linked water blocking tape.

7. An easily laid high density optical cable as claimed in claim 5 wherein said core is filled with dry water-blocking material between said loose tubes, said loose tubes being filled with dry water-blocking material, said water-blocking material being water-blocking powder or water-blocking yarn.

8. An easily laid high density optical cable as claimed in claim 6, wherein said water blocking layer is wrapped with a water blocking binder having a high shrinkage factor, and the outer surface of the outer sheath is formed with raised lines corresponding to the binder.

9. An easily laid high density optical cable as claimed in claim 1 or 2 wherein said outer jacket has cable openings therein and cable openings are formed in the outer surface of the outer jacket corresponding to the cable openings.

10. An easily laid high density optical cable as claimed in claim 1 or 2 wherein said outer sheath is an HDPE outer sheath having a coefficient of friction of 0.10 and a hardness of 62 HA.