CN113341519A

CN113341519A - Straight slot framework type optical cable

Info

Publication number: CN113341519A
Application number: CN202110742411.8A
Authority: CN
Inventors: 刘为; 阎浩; 翟睿
Original assignee: Yangtze Optical Fibre and Cable Co Ltd
Current assignee: Yangtze Optical Fibre and Cable Co Ltd
Priority date: 2021-05-07
Filing date: 2021-07-01
Publication date: 2021-09-03
Anticipated expiration: 2041-07-01
Also published as: CN113341519B

Abstract

The invention relates to a straight slot framework type optical cable, which comprises a framework type cable core and an outer sheath, wherein the framework type cable core comprises a framework and framework slots which are arranged at the periphery of the framework at intervals and extend along the axial direction, and stacked optical fiber ribbons are arranged in the framework slots. The invention does not need torsion when the skeleton is linearly folded and unfolded, thereby greatly simplifying the manufacturing process and equipment of the cable core and greatly improving the production speed and efficiency of the skeleton type optical cable; the discontinuously bonded optical fiber ribbon has good stretching and twisting performance, and the non-bonded section of the optical fiber can be fully stretched without stress when the optical fiber cable is pulled and bent, so that the stability of the transmission performance of the optical fiber is ensured; the optical fiber ribbon is arranged in the straight groove, so that the stress state of matrix edge fibers when the laminated optical fiber ribbon enters the groove can be improved, and the control difficulty of the process of bringing the optical fiber ribbon into the groove can be reduced.

Description

Straight slot framework type optical cable

Technical Field

The invention relates to a straight slot framework type optical cable, and belongs to the technical field of optical communication transmission.

Background

The skeleton type optical cable is an important choice for constructing a distribution line segment of the access network optical cable due to the characteristics of high density, high strength, convenience in branching and no factice. The cable core of the skeleton type optical cable is generally composed of a skeleton and an optical fiber ribbon arranged in a skeleton groove, in order to prevent the optical fiber ribbon from being stressed, the optical fiber ribbon needs a certain twisting pitch in the skeleton groove to form a stable matrix combination, and the bending resistance of the optical fiber ribbon is ensured. Therefore, production equipment, particularly a framework take-up and pay-off rack is huge and heavy, the rotating speed of the framework is limited, the production efficiency of the optical cable is influenced, meanwhile, the stress state of the matrix side fibers of the optical fiber ribbon is also influenced by the spiral torsion state after the optical fiber ribbon enters the groove, the control difficulty of the optical fiber ribbon entering groove process is high, and the optical cable with larger core number is difficult to produce by adopting 12-24 core optical fiber ribbons.

Disclosure of Invention

The present invention aims to solve the technical problem of providing a straight-slot framework type optical cable, which not only simplifies the cable core structure of the framework type optical cable, thereby simplifying the manufacturing process and equipment of the cable core, but also has good stretching and twisting performance.

The technical scheme adopted by the invention for solving the problems is as follows: the optical fiber ribbon is discontinuously bonded, and non-bonded optical fibers of the discontinuously bonded optical fiber ribbons are in a bent, overlapped and loose shape.

According to the scheme, the discontinuous bonding optical fiber ribbon comprises optical fibers which are arranged in parallel, the optical fibers which are arranged in parallel are discontinuously bonded into a ribbon along the longitudinal direction to form a bonding section and a non-bonding section, and the optical fibers at the bonding section are closely arranged in parallel.

In the scheme, the bonding section optical fiber is bonded by 2 cores or multiple cores, and the bonding sections are arranged in a staggered mode along the transverse direction.

According to the scheme, the length of the bonding section in the discontinuously bonded optical fiber ribbon is 5-50 mm, the bonding section is formed by curing the resin bonded optical fiber, and the length of the non-bonding section is 30-150 mm.

According to the scheme, the number of the discontinuously bonded optical fiber ribbons is 2-24.

According to the scheme, the radial section of the framework grooves is rectangular, and 3-12 framework grooves are uniformly distributed in the circumferential direction.

According to the scheme, 2-8 discontinuous bonding optical fiber ribbons are stacked in the framework groove along the radial direction.

According to the scheme, the middle part of the framework is provided with the reinforcing piece.

According to the scheme, the framework type cable core is coated with the water-resistant layer and the armor layer, and the armor layer is coated with the outer sheath.

The invention has the beneficial effects that: 1. the framework grooves which are longitudinally and linearly formed are adopted, and the indirect bonding optical fiber ribbons are arranged in the framework grooves, so that the framework is linearly wound and unwound without torsion when the framework type cable core is manufactured and the optical fiber ribbons are arranged in the grooves, that is, a huge and heavy framework winding and unwinding frame is not required to rotate, the manufacturing process and equipment of the cable core are greatly simplified, and the production speed and efficiency of the framework type optical cable are greatly improved; 2. the optical fiber ribbon is discontinuously bonded, the optical fiber at the non-bonded section of the discontinuously bonded optical fiber ribbon is in a bending, overlapping and relaxing shape, a certain stretching allowance exists, the optical fiber ribbon has good stretching and twisting performance, the non-bonded section of the optical fiber can be fully stretched without stress when the optical fiber is pulled and bent, and the stability of the optical fiber transmission performance is ensured; 3. the optical fiber ribbon is arranged in the framework groove formed in the longitudinal straight line, so that the twisting state is avoided, the stress state of matrix side fibers when the laminated optical fiber ribbon is subjected to groove entering is favorably improved, the control difficulty of the optical fiber ribbon groove entering process is reduced, the 12-24 core optical fiber ribbon can be used for the framework optical cable, and the optical fiber capacity of the framework optical cable can be effectively increased.

Drawings

FIG. 1 is a radial cross-section of one embodiment of the present invention.

Fig. 2 is a schematic front view of a discontinuously bonded fiber optic ribbon according to one embodiment of the present invention.

Fig. 3 is a side view schematic diagram of a discontinuously bonded fiber optic ribbon according to one embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

One embodiment of the invention is shown in fig. 1-3, and comprises a skeleton type cable core and an outer sheath 6, wherein the skeleton type cable core comprises a skeleton 1 and skeleton grooves which are arranged at intervals on the periphery of the skeleton and extend along the axial direction, stacked optical fiber ribbons 2 are arranged in the skeleton grooves, the skeleton grooves extend along the axial direction in a straight line to form straight grooves, the radial cross sections of the skeleton grooves are rectangular, and 6 skeleton grooves are uniformly distributed in the circumferential direction. The optical fiber ribbon is a discontinuous bonding optical fiber ribbon, the discontinuous bonding optical fiber ribbon comprises optical fibers 7 which are arranged in parallel, the optical fibers which are arranged in parallel are discontinuously bonded into the ribbon along the longitudinal direction to form a bonding section and a non-bonding section, wherein the optical fibers of the bonding section are closely arranged in parallel, the bonding section is formed by curing resin 8 bonding optical fibers, the optical fibers of the bonding section are bonded by 2 cores, the bonding section is arranged in a transversely staggered mode, the length of the bonding section is 30mm, the optical fibers of the non-bonding section are in a bending, overlapping and loose shape or in a net-shaped structure, a certain longitudinal stretching allowance exists, the length of the non-bonding section is 100mm, the number of each core of the discontinuous bonding optical fiber ribbon is 6 cores, and 6 cores are stacked in the framework grooves along the radial direction. A reinforcing piece 5 is arranged in the middle of the framework, and the reinforcing piece is a steel wire or aramid yarn. And a water-blocking layer 4 is coated outside the framework type cable core, the water-blocking layer is composed of water-blocking yarns or water-blocking tapes, a metal armor layer 3 is coated outside the water-blocking layer, the metal armor layer is composed of longitudinally-coated aluminum tapes, and an outer sheath 6 is coated outside the armor layer.

Claims

1. A straight slot framework type optical cable comprises a framework type cable core and an outer sheath, wherein the framework type cable core comprises a framework and framework slots which are arranged at the periphery of the framework at intervals and extend along the axial direction, and stacked optical fiber ribbons are arranged in the framework slots.

2. The straight slotted core optical cable of claim 1 wherein said intermittently bonded optical fiber ribbons comprise parallel aligned optical fibers intermittently bonded in a longitudinal direction to form bonded segments and unbonded segments, wherein the bonded segments are arranged in close parallel.

3. The slotted skeletal cable of claim 2, wherein the bonded segment fibers are 2-core or multi-core bonded and the bonded segments are staggered in the transverse direction.

4. The straight slotted-core optical cable according to claim 2 or 3, wherein the length of the spliced section of the intermittently spliced optical fiber ribbon is 5 to 50mm, the spliced section is formed by curing a resin-spliced optical fiber, and the length of the non-spliced section is 30 to 150 mm.

5. The straight slotted core optical cable according to claim 1 or 2, wherein the number of cores of each of the intermittently bonded optical fiber ribbons is 2 to 24.

6. The straight slot skeletal cable according to claim 1 or 2, characterized in that the radial cross section of the skeletal slots is rectangular, and 3-12 skeletal slots are uniformly distributed in the circumferential direction.

7. The straight slotted core cable according to claim 1 or 2, wherein 2 to 8 intermittently bonded optical fiber ribbons are radially stacked in the slotted core.

8. A slotted former optical cable according to claim 1 or 2 wherein a strength member is provided in the middle of the former.

9. The straight slot skeletal cable of claim 1 or 2, wherein the skeletal cable core is coated with a water-blocking layer and an armor layer, and the armor layer is coated with an outer sheath.