WO2022027885A1

WO2022027885A1 - Layer-stranded ribbon optical fiber cable having special-shaped structure

Info

Publication number: WO2022027885A1
Application number: PCT/CN2020/133728
Authority: WO
Inventors: 须雁; 任建刚
Original assignee: 江苏长飞中利光纤光缆有限公司
Priority date: 2020-08-07
Filing date: 2020-12-04
Publication date: 2022-02-10
Also published as: CN212460140U

Abstract

A layer-stranded ribbon optical fiber cable having a special-shaped structure, relating to the field of cables, and comprising an outer jacket (1), a wrapping layer (2), at least three first loose tubes (3), and a first reinforcement (5). A sandglass-shaped second cavity (34) is formed inside each first loose tube body (33); the left and right sides of each first loose tube body (33) are each provided with a connecting component (35); the upper and lower sides of the first loose tube body (33) are each provided with a semicircular edge protector (31); the two edge protectors (31) are respectively connected to the connecting components (35) on the left and right sides; the edge protectors (31) surround the first loose tube body (33) to form two first cavities (32); the two sub-cavities of the sandglass-shaped second cavity (34) are provided with optical fiber ribbon stacks (4). The beneficial effects such as a simple structure, strong compressive performance, strong tensile performance, high fiber core density, the loose tube bodies being not prone to deformation, and no displacement of optical fibers are achieved; the problem in the prior art that the compressive performance of a single loose tube of layer-stranded ribbon optical fiber cables is not strong is solved.

Description

A layered stranded ribbon optical cable with special-shaped structure

technical field

The utility model belongs to the field of cables, in particular to a layer-twisted ribbon optical cable with a special-shaped structure.

Background technique

As the connection carrier of the trunk network, the usage of the stranded ribbon cable is increasing year by year. Due to the high density of optical fibers in the loose tube of the stranded ribbon cable, the requirements for the lateral pressure resistance of the loose tube are higher.

In the prior art, for example, CN111175920A discloses a communication optical cable for 5G network, which has a central strength member, a loose tube, a protective layer, an outer sheath, and an optical fiber. Structure, one end of the first and second protective walls are connected, the other end of the first and second protective walls are connected, the loose tube is in the shape of a semi-cylindrical body, a cavity is formed between the first and second protective walls, and the optical fiber is located in the In the cavity, both edges of the second protective wall are tangent to the inner wall of the protective layer, and the vertical bisector plane of the second protective wall of the loose tube passes through the top straight line of the first protective wall of the loose tube and the center reinforcement. axis, the top straight line of the first protective wall is in contact with the outer edge of the central reinforcement; the adjacent loose tubes are tangent.

The above-mentioned prior art has the following drawbacks: the loose tube body is easily crushed under direct force, thereby affecting the use of the optical cable.

Utility model content

In order to solve the above problems, the purpose of this utility model is to disclose a layered stranded ribbon optical cable with a special-shaped structure, which is realized by adopting the following technical solutions.

A layered stranded ribbon optical cable with a special-shaped structure has an outer sheath, a tape layer, at least three first loose tubes and a first reinforcement, the first loose tubes are stranded outside the first reinforcement , the wrapping layer is located outside the stranded layer formed by the loose tube, and the outer sheath is extruded outside the wrapping layer, characterized in that the first loose tube is composed of the main body of the first loose tube, and the first loose tube is An hourglass-shaped second cavity is formed inside the casing body. The second cavity is composed of two sub-accommodating cavities. A connecting part is provided on the left and right sides of the first loose casing body. Each side is provided with a semicircle guard, the left end of the upper guard is connected with the left connecting part, the right end of the lower guard is connected with the right connecting part, and the guard encloses the main body of the first loose tube inside, Two first chambers are formed, and the two sub chambers of the hourglass-shaped second chamber are provided with optical fiber ribbon stacking bodies.

The above-mentioned layer-twisted ribbon optical cable with a special-shaped structure is characterized in that the optical fiber ribbon stacking body is composed of at least two optical fiber ribbons, and the optical fiber ribbon is formed by at least two optical fibers.

The above-mentioned layer-stranded ribbon optical cable with a special-shaped structure is characterized in that the optical fiber type is G.652 type or G.653 type or G.654 type or G.655 type or G.656 type or Type G.657 or Type A1a or Type A1b or Type A1c.

In the above-mentioned layer-stranded optical fiber cable with a special-shaped structure, the two sub-chambers of the second chamber can be provided with optical fiber ribbons formed by different types of optical fibers, and different types of optical fibers can be placed. ; The edge guards on the upper and lower sides increase the lateral pressure resistance of the optical cable. When the optical cable receives a large pressure, the edge guards are squeezed and deformed, and the main body of the first loose tube inside is not stressed, so that the internal optical fiber is transmitted. Performance is not affected.

The above-mentioned layer-twisted ribbon optical cable with a special-shaped structure is characterized in that a second reinforcing member is arranged in the first cavity, and the material of the second reinforcing member is a steel wire or a glass fiber rod.

In the above-mentioned layer-twisted ribbon optical cable with a special-shaped structure, the tensile and compressive properties of the first loose tube are enhanced, so that it can adapt to a harsher working environment.

The above-mentioned layer-twisted ribbon optical cable with a special-shaped structure is characterized in that a second supporting member is clamped between the two sub-accommodating cavities of the second cavity, and the material of the second supporting member is Polypropylene.

In the above-mentioned layer-twisted ribbon optical cable with a special-shaped structure, a second support member is clamped between the two sub-volume cavities of the second chamber, which can further enhance the compression resistance of the first loose tube, and at the same time. It can also prevent the main body of the first loose tube from deforming the second cavity due to excessive pressure, which affects the transmission performance of the internal optical fiber, and also prevents the optical fiber ribbons of the two sub-cavities of the second cavity from shifting each other, causing pressure. fiber, which will increase the additional attenuation of the fiber or break the fiber.

The above-mentioned layer-stranded ribbon optical cable with a special-shaped structure is characterized in that a second loose tube is arranged in the first cavity, and at least one optical fiber is arranged in the second loose tube, and the second The loose tube material is polybutylene terephthalate or modified polypropylene.

The above-mentioned layer-twisted ribbon optical cable with a special-shaped structure makes full use of the space in the loose tube, increases the core density of the optical cable, and at the same time enables the optical cable to have two connection modes of optical fiber ribbon and optical cable, satisfying Different construction needs.

The above-mentioned layer-twisted ribbon optical cable with a special-shaped structure is characterized in that each top corner of the upper and lower sides of the outside of the first loose tube main body forms a first support member, and the first support member is connected to the edge guard. The inner wall of the loose tube is in contact, which further enhances the compressive performance of the loose tube.

The above-mentioned layered ribbon optical cable with a special-shaped structure is characterized in that the outer sheath material is low density polyethylene or medium density polyethylene or high density polyethylene or flame retardant polyolefin or polychlorinated vinyl.

The above-mentioned layer-twisted ribbon optical cable with a special-shaped structure is characterized in that the material of the first reinforcing member is a steel wire or a glass fiber rod.

The above-mentioned layer-twisted ribbon optical cable with a special-shaped structure is characterized in that the material of the first loose tube is polybutylene terephthalate or modified polypropylene.

Therefore, the utility model has the beneficial effects of simple structure, strong compressive resistance, strong tensile resistance, high fiber core density, the main body of the loose tube is not easily deformed, and the optical fiber is not displaced.

Description of drawings

FIG. 1 is a schematic three-dimensional structure diagram of Embodiment 1 of the present invention.

FIG. 2 is a schematic diagram of the structure of the loose tube according to Embodiment 1 to Embodiment 4 of the present invention.

3 is a schematic structural diagram of Embodiment 2 of the present invention.

FIG. 4 is a schematic structural diagram of Embodiment 3 of the present invention.

FIG. 5 is a schematic structural diagram of Embodiment 4 of the present invention.

6 is a schematic structural diagram of Embodiment 5 of the present invention.

In the figure: 1. Outer sheath, 2. Tape layer, 3. First loose tube, 31. Edge protection, 32. First cavity, 33. First loose tube body, 34. Second cavity , 35. connecting member, 36. first supporting member, 4. optical fiber ribbon stack, 5. first reinforcing member, 6. second reinforcing member, 7. second supporting member, 8. second loose tube.

detailed description

Example 1

Please refer to Figures 1 and 2, a layered ribbon optical cable with a special-shaped structure, which has an outer sheath 1, a tape layer 2, at least three first loose tubes 3 and a first strength member 5. The first A loose tube 3 is stranded outside the first reinforcing member 5, the wrapping layer 2 is located outside the stranded layer formed by the loose tube 3, and the outer sheath 1 is extruded outside the wrapping layer 2. A loose tube 3 is composed of a first loose tube main body 33, and an hourglass-shaped second chamber 34 is formed inside the first loose tube body 33. The second chamber 34 is composed of two sub-chambers. A loose tube body 33 is provided with a connecting member 35 on the left and right sides, a semicircular edge guard 31 is provided on each of the upper and lower sides of the first loose tube body 33, and the left end of the upper side guard 31 is connected with the left side member 35 is connected, the right end of the lower side guard 31 is connected with the right connecting part 35, the guard 31 encloses the first loose tube main body 33 inside, and forms two first cavities 32, the hourglass-shaped second The two sub-chambers of the chamber 34 are provided with an optical fiber ribbon stacking body 4, and the optical fiber ribbon stacking body 4 is composed of at least two optical fiber ribbons, and the optical fiber ribbons are formed by at least two optical fibers.

In this embodiment, the two sub-chambers of the second chamber 34 can be provided with optical fiber ribbons formed by different types of optical fibers, which can accommodate different types of optical fibers, and the types of optical fibers in the optical cable; The edge 31 increases the lateral pressure resistance of the optical cable. When the optical cable receives a large pressure, the edge protection 31 is squeezed and deformed, and the inner first loose tube body 33 is not stressed, so that the internal optical fiber transmission performance is not affected. Influence.

Example 2

Please refer to Fig. 2 and Fig. 3 , a layered ribbon optical cable with a special-shaped structure has an outer sheath 1, a tape layer 2, at least three first loose tubes 3 and a first strength member 5. The first A loose tube 3 is stranded outside the first reinforcing member 5, the wrapping layer 2 is located outside the stranded layer formed by the loose tube 3, and the outer sheath 1 is extruded outside the wrapping layer 2. A loose tube 3 is composed of a first loose tube main body 33, and an hourglass-shaped second chamber 34 is formed inside the first loose tube body 33. The second chamber 34 is composed of two sub-chambers. A loose tube body 33 is provided with a connecting member 35 on the left and right sides, a semicircular edge guard 31 is provided on each of the upper and lower sides of the first loose tube body 33, and the left end of the upper side guard 31 is connected with the left side member 35 is connected, the right end of the lower side guard 31 is connected with the right connecting part 35, the guard 31 encloses the first loose tube main body 33 inside, and forms two first cavities 32, the hourglass-shaped second The two sub-chambers of the chamber 34 are provided with an optical fiber ribbon stacking body 4, and the optical fiber ribbon stacking body 4 is composed of at least two optical fiber ribbons, and the optical fiber ribbons are formed by at least two optical fibers. A second reinforcing member 6 is arranged in the first cavity 32 .

The layered stranded optical fiber cable with a special-shaped structure described in the above embodiment is characterized in that the material of the second reinforcing member 6 is steel wire or glass fiber rod.

This embodiment enhances the tensile properties and compressive properties of the first loose tube 3, so that it can adapt to a harsher working environment.

Example 3

Please refer to FIGS. 2 and 4 , a layered ribbon optical cable with a special-shaped structure has an outer sheath 1 , a tape layer 2 , at least three first loose tubes 3 and a first strength member 5 . A loose tube 3 is stranded outside the first reinforcing member 5, the wrapping layer 2 is located outside the stranded layer formed by the loose tube 3, and the outer sheath 1 is extruded outside the wrapping layer 2. A loose tube 3 is composed of a first loose tube main body 33 , and an hourglass-shaped second cavity 34 is formed inside the first loose tube main body 33 , and the second cavity 34 is composed of two sub-cavities. A loose tube body 33 is provided with a connecting member 35 on the left and right sides, a semicircular edge guard 31 is provided on each of the upper and lower sides of the first loose tube body 33, and the left end of the upper side guard 31 is connected with the left side member 35 is connected, the right end of the lower side guard 31 is connected with the right connecting part 35, the guard 31 encloses the first loose tube body 33 inside, and forms two first chambers 32, the hourglass-shaped second The two sub-chambers of the cavity 34 are provided with an optical fiber ribbon stacking body 4, and the optical fiber ribbon stacking body 4 is composed of at least two optical fiber ribbons, and the optical fiber ribbons are formed by at least two optical fibers. A second reinforcing member 6 is arranged in the first cavity 32 , and a second support member 7 is clamped between the two sub-cavities of the second cavity 34 .

The layer-twisted ribbon optical cable with a special-shaped structure described in the above embodiment is characterized in that the material of the second support member 7 is polypropylene.

In this embodiment, the second support member 7 is clamped between the two sub-accommodating cavities of the second chamber 34, which can further enhance the compression resistance of the first loose tube 3, and can also prevent the main body of the first loose tube at the same time. 33 Due to the excessive pressure, the second cavity 34 is deformed, which affects the transmission performance of the internal optical fiber, and can also prevent the optical fiber ribbons of the two sub-cavity cavities of the second cavity 34 from shifting each other, causing fiber compression and additional attenuation of the optical fiber. Problems such as enlargement or fiber breakage.

Example 4

Please refer to FIGS. 2 and 5 , a layered ribbon optical cable with a special-shaped structure has an outer sheath 1 , a tape layer 2 , at least three first loose tubes 3 and a first strength member 5 . A loose tube 3 is stranded outside the first reinforcing member 5, the wrapping layer 2 is located outside the stranded layer formed by the loose tube 3, and the outer sheath 1 is extruded outside the wrapping layer 2. A loose tube 3 is composed of a first loose tube main body 33 , and an hourglass-shaped second cavity 34 is formed inside the first loose tube main body 33 , and the second cavity 34 is composed of two sub-cavities. A loose tube main body 33 is provided with a connecting member 35 on the left and right sides, a semicircular protective edge 31 is provided on each of the upper and lower sides of the first loose tube main body 33, and the left end of the upper protective edge 31 is connected with the left side member 35 is connected, the right end of the lower side guard 31 is connected with the right connecting part 35, the guard 31 encloses the first loose tube body 33 inside, and forms two first chambers 32, the hourglass-shaped second The two sub-chambers of the cavity 34 are provided with an optical fiber ribbon stacking body 4, and the optical fiber ribbon stacking body 4 is composed of at least two optical fiber ribbons, and the optical fiber ribbons are formed by at least two optical fibers. A second loose tube 8 is arranged in the first cavity 32 , and at least one optical fiber is arranged in the second loose tube 8 .

The layer-twisted ribbon optical cable with a special-shaped structure described in the above embodiment is characterized in that the material of the second loose tube 8 is polybutylene terephthalate or modified polypropylene.

In this embodiment, the space in the loose tube is fully utilized, the core density of the optical cable is increased, and at the same time, the optical cable can have two connection modes of optical fiber ribbon and optical fiber cable to meet different construction requirements.

Example 5

Please refer to FIGS. 2 and 6 , a layered ribbon optical cable with a special-shaped structure has an outer sheath 1 , a tape layer 2 , at least three first loose tubes 3 and a first strength member 5 . A loose tube 3 is stranded outside the first reinforcing member 5, the wrapping layer 2 is located outside the stranded layer formed by the loose tube 3, and the outer sheath 1 is extruded outside the wrapping layer 2. A loose tube 3 is composed of a first loose tube main body 33 , each of the top and bottom corners of the upper and lower sides of the first loose tube main body 33 forms a first support member 36 , and the first loose tube main body 33 forms a first support member 36 inside The hourglass-shaped second chamber 34, the second chamber 34 is composed of two sub-chambers, the left and right sides of the first loose tube body 33 are provided with a connecting member 35, and the upper and lower sides of the first loose tube body 33 are provided. Each is provided with a semicircle guard 31, the left end of the upper guard 31 is connected with the left connecting member 35, the right end of the lower guard 31 is connected with the right connecting member 35, and the guard 31 connects the first loose tube. The main body 33 is enclosed in the interior and forms two first chambers 32, the first support member 36 is in contact with the inner wall of the edge guard 31, and the two sub chambers of the hourglass-shaped second chamber 34 are provided with optical fiber ribbons Ribbon stack 4, the optical fiber ribbon stack 4 is composed of at least two optical fiber ribbons, and the optical fiber ribbon is formed by at least two optical fibers, and the first cavity 32 is provided with a second loose tube 8. At least one optical fiber is provided in the second loose tube 8 .

This embodiment further enhances the compression resistance of the loose tube 3 .

The layered stranded optical fiber cable with a special-shaped structure described in any of the above-mentioned embodiments is characterized in that the material of the outer sheath 1 is low-density polyethylene or medium-density polyethylene or high-density polyethylene or flame-retardant polyethylene. Olefin or PVC.

A layered stranded ribbon optical cable with a special-shaped structure described in any of the above-mentioned embodiments is characterized in that the optical fiber type is G.652 type or G.653 type or G.654 type or G.655 type or G.655 type or G. Type 656 or G.657 or A1a or A1b or A1c.

The layered stranded optical fiber cable with a special-shaped structure described in any of the above embodiments is characterized in that the material of the first reinforcing member 5 is a steel wire or a glass fiber rod.

The layered stranded optical fiber cable having a special-shaped structure according to any of the above embodiments is characterized in that the material of the first loose tube 3 is polybutylene terephthalate or modified polypropylene.

The shape of the loose tube 3 in the utility model is different from that of the prior art, which is convenient for peeling and does not require professional tools, so that the operation efficiency is greatly improved.

The utility model solves the problem that the compressive performance of a single loose tube of a layer twisted ribbon optical cable in the prior art is not strong.

The above-mentioned embodiments are only the preferred technical solutions of the present invention, and should not be regarded as limitations of the present invention. The protection scope of the present utility model shall take the technical solutions described in the claims, including the equivalent alternatives of the technical features in the technical solutions described in the claims, as the protection scope. That is, equivalent replacements and improvements within this scope are also within the protection scope of the present invention.

Claims

A layered stranded ribbon optical cable with a special-shaped structure, comprising an outer sheath (1), a tape layer (2), at least three first loose tubes (3) and a first reinforcement (5), the first A loose tube (3) is twisted outside the first reinforcing member (5), the wrapping layer (2) is located outside the twisted layer formed by the loose tube (3), and the outer sheath (1) is extruded on the wrapping tape Outside the layer (2), it is characterized in that the first loose tube (3) is composed of a first loose tube body (33), and an hourglass-shaped second loose tube body (33) is formed inside the first loose tube body (33). The chamber (34), the second chamber (34) is composed of two sub-chambers, the left and right sides of the first loose tube body (33) are provided with a connecting member (35), the first loose tube body ( 33) A semicircular edge guard (31) is provided on each of the upper and lower sides, the left end of the upper edge protection (31) is connected with the left connecting member (35), and the right end of the lower edge protection (31) is connected with the right side The components (35) are connected together, and the edge protection (31) encloses the main body (33) of the first loose tube inside, and forms two first chambers (32). The two sub-accommodating cavities are provided with optical fiber ribbon stacking bodies (4).
A layered ribbon optical cable with a special-shaped structure according to claim 1, characterized in that a second strength member (6) is arranged in the first cavity (32), and the second strength member (6) The material is steel wire or glass fiber rod.
A layered ribbon optical cable with a special-shaped structure according to claim 1, characterized in that a second supporting member (7) is clamped between the two sub-accommodating cavities of the second cavity (34), The material of the second support member (7) is polypropylene.
A layered ribbon optical cable with a special-shaped structure according to claim 1, characterized in that the first cavity (32) is provided with a second loose tube (8), and the second loose tube ( 8) At least one optical fiber is provided inside, and the material of the second loose tube (8) is polybutylene terephthalate or modified polypropylene.
A layered ribbon optical cable with a special-shaped structure according to claim 1, characterized in that each top corner of the upper and lower sides of the outer part of the first loose tube main body (33) forms a first support member (36) ), the first support member (36) is in contact with the inner wall of the edge guard (31).
A layered ribbon optical cable with a special-shaped structure according to claim 1, characterized in that the material of the outer sheath (1) is low density polyethylene or medium density polyethylene or high density polyethylene or resistance Burn polyolefin or polyvinyl chloride.
A layered ribbon optical cable with a special-shaped structure according to claim 1, characterized in that the material of the first reinforcing member (5) is steel wire or glass fiber rod.
The layered stranded ribbon optical cable with a special-shaped structure according to claim 1, characterized in that the material of the first loose tube (3) is polybutylene terephthalate or modified polypropylene.
A layered optical fiber ribbon cable with a special-shaped structure according to claim 1, characterized in that the optical fiber ribbon stack (4) is composed of at least two optical fiber ribbons, and the optical fiber ribbon is composed of at least two optical fibers and brought together.
A layered ribbon optical cable with a special-shaped structure according to claim 9, characterized in that the optical fiber type is G.652 type or G.653 type or G.654 type or G.655 type or G. Type 656 or G.657 or A1a or A1b or A1c.