CN112558252A

CN112558252A - 5G optical cable and preparation method thereof

Info

Publication number: CN112558252A
Application number: CN202011624553.6A
Authority: CN
Inventors: 蔡炜; 缪小明; 缪斌; 缪威玮; 曹兴月
Original assignee: Jiangsu Zhongtian Technology Co Ltd
Current assignee: Jiangsu Zhongtian Technology Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-03-26

Abstract

A5G optical cable comprises a cable core, an armored pipe and an outer sheath, and further comprises a buffer layer, wherein the buffer layer is arranged between the armored pipe and the outer sheath, the buffer layer comprises a deformable buffer part and a buffer groove located on one side of the buffer part, and the buffer groove is used for providing a space for deformation of the buffer layer when the 5G optical cable is extruded. The invention also provides a preparation method of the 5G optical cable.

Description

5G optical cable and preparation method thereof

Technical Field

The application relates to the technical field of optical cables, in particular to a 5G optical cable and a preparation method thereof.

Background

With the advance of 5G construction, the 5G optical cable not only needs to have high-capacity transmission performance, but also needs to ensure the wiring space and the convenience of wiring construction. However, since the conventional 5G optical cable has a limited deformation space due to the close arrangement of the optical fiber, the inner tube, the outer tube, and other components, the conventional 5G optical cable is difficult to wire or even impossible to wire when the conventional 5G optical cable is used for wiring in some places with irregular wiring environment and limited space.

Disclosure of Invention

In view of the above, there is a need for a 5G optical cable convenient for wiring and a method for manufacturing the same.

A5G optical cable comprises a cable core, an armored pipe and an outer sheath, and further comprises a buffer layer, wherein the buffer layer is arranged between the armored pipe and the outer sheath, the buffer layer comprises a deformable buffer part and a buffer groove located on one side of the buffer part, and the buffer groove is used for providing a space for deformation of the buffer layer when the 5G optical cable is extruded.

Furthermore, the number of the buffer grooves is multiple, each buffer groove is located between two buffer parts, and the buffer parts are uniformly distributed along the periphery of the armor pipe by taking the center of the armor pipe as a circle center.

Further, the cross section of the buffer part is triangular, one vertex of the triangle is close to the outer sheath, and the other two vertices are close to the armor tube.

Further, the cross section of buffer is isosceles triangle.

Further, the buffer portion comprises Kevlar aramid.

Furthermore, the cable core comprises an inner sheath, a plurality of optical fibers and a water blocking piece, the optical fibers and the water blocking piece are arranged in the inner sheath, and the water blocking piece is used for preventing water from entering the cable core.

A preparation method of a 5G optical cable comprises the following steps:

installing a plurality of optical fibers and water-blocking yarns on an optical fiber pay-off rack, adjusting the pay-off tension of the optical fiber pay-off rack, and drawing the optical fibers and the water-blocking yarns out to the machine head of the plastic extruding machine;

setting the processing temperature of the plastic extruding machine to a first preset temperature and installing a first plastic extruding mould;

the optical fibers and the water blocking yarns penetrate into a first extrusion molding die, and low-smoke halogen-free materials are subjected to extrusion molding through an extrusion molding machine so as to form an inner jacket on the peripheries of the optical fibers and the water blocking yarns;

sleeving the inner sheath on a unit pay-off rack, adjusting pay-off tension, and drawing the inner sheath to the machine head of the armoring machine;

spirally stranding and armoring the stainless steel wires into a spiral armoring pipe which surrounds the periphery of the inner sheath by an armoring machine;

mounting the spiral armor pipe on a unit pay-off rack, adjusting pay-off tension, and drawing the spiral armor pipe out to a machine head of an extruding machine;

installing Kevlar aramid fiber on an aramid fiber pay-off rack, adjusting pay-off tension, and pulling out the reinforcing piece to a machine head;

setting the processing temperature of the plastic extruding machine to be a second preset temperature and assembling a second plastic extruding mould;

penetrating the spiral armor tube and Kevlar aramid into a second extrusion molding die, and carrying out extrusion molding through an extruding machine to form a buffer layer surrounding the periphery of the spiral armor tube, wherein the buffer layer comprises a deformable buffer part and forms a buffer groove positioned on one side of the buffer part;

mounting the buffer layer on a unit pay-off rack, adjusting pay-off tension, and drawing the buffer layer out to a machine head of an extruding machine;

setting the processing temperature of the plastic extruding machine to be a third preset temperature and assembling a third plastic extruding mould;

the buffer layer is threaded into a third extrusion die and extruded through an extruder into an outer jacket surrounding the buffer layer.

Further, the preparation method of the 5G optical cable further comprises the following steps of when the low-smoke halogen-free material is subjected to extrusion molding processing by an extruder:

and providing a hot water tank, a warm water tank and a cold water tank, and setting the temperatures of the hot water tank, the warm water tank and the cold water tank to a predetermined temperature to reduce the contractibility of the inner sheath.

Further, the first preset temperature is 140-170 ℃, the second preset temperature is 140-150 ℃, and the third preset temperature is 140-160 ℃.

Furthermore, the friction coefficient of the outer sheath is lower than 0.1, and the outer sheath is made of low-smoke halogen-free materials.

The 5G optical cable manufactured by the preparation method of the 5G optical cable can change the outer diameter of the 5G optical cable through the deformation of the buffer layer, so that the wiring is realized in places with irregular wiring environment and limited space, and the 5G optical cable is simple and convenient to wire.

Drawings

Fig. 1 is a schematic structural diagram of a 5G optical cable provided in the present application.

Fig. 2 is a flowchart of a method for manufacturing a 5G optical cable provided in the present application.

Description of the main elements

5G optical cable	10
		Cable core	11
Inner sheath	111
		Optical fiber	112
Water-blocking piece	113
		Armored pipe	12
Buffer layer	13
		Buffer part	131
Reinforcing element	133
		Buffer tank	132
Outer sheath	14

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

So that the manner in which the above recited objects, features and advantages of embodiments of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. In addition, the features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth to provide a thorough understanding of embodiments of the invention, and the described embodiments are merely a subset of embodiments of the invention, rather than a complete embodiment. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the embodiments of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of the present invention belong. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the invention.

Please refer to fig. 1, which is a schematic structural diagram of a 5G optical cable 10 provided in the present application. The 5G optical cable 10 comprises a cable core 11, an armored pipe 12, a buffer layer 13 and an outer sheath 14. The cable core 11 is used for transmitting communication signals. The armored pipe 12 surrounds the cable core 11, the outer sheath 14 is located on the periphery of the armored pipe 12, and the armored pipe 12 and the outer sheath 14 are used for protecting the cable core 11. The buffer layer 13 is arranged between the armor tube 12 and the outer sheath 14, the buffer layer 13 comprises a deformable buffer part 131 and a buffer groove 132 positioned on one side of the buffer part 131, and the buffer groove 132 is used for providing a space for the deformation of the buffer layer 13 when the 5 optical cable is extruded. In this way, even when wiring is performed in a place with an irregular wiring environment and a limited space, since the buffer groove 132 provides a space for deformation of the buffer layer 13, the 5G optical cable 10 can change the outer diameter of the 5G optical cable 10 by deformation of the buffer layer 13, thereby achieving wiring in a place with an irregular wiring environment and a limited space. In addition, the buffer layer 13 may also buffer the impact force when the 5G optical cable 10 receives an external high-strength impact force to disperse the impact force.

Specifically, the cable core 11 includes an inner sheath 111, a plurality of optical fibers 112, and a water blocking member 113. The plurality of optical fibers 112 are disposed within the inner sheath 111 for transmitting communication signals. The optical fibers 112 are colored fibers 112 to facilitate differentiation of the optical fibers 112. The water blocking member 113 is disposed in the inner sheath 111 for preventing water from entering the cable core 11. In one embodiment, the water blocking member 113 is a water blocking yarn. Inner sheath 111 adopts low shrink, low smoke and zero halogen, easily tear from the material. Because inner sheath 111 has low shrink performance, make optic fibre 112 can not influence optic fibre 112 performance because inner sheath 111 contracts and lead to the atress, because inner sheath 111 easily tears apart, make 5G optical cable 10 facilitate tearing apart when being under construction inner sheath 111 thereby expose optic fibre 112.

In one embodiment, the armor tube 12 is a spiral armor tube 12, such as a single-filament steel wire unidirectional spiral stranded armor, surrounding the outer circumference of the cable core 11. In another embodiment, the armor tube 12 is formed by longitudinally wrapping and armoring a steel-plastic composite tape, and is longitudinally wrapped on the periphery of the cable core 11. The armor tube 12 may also be made of a non-metallic material, such as a fiberglass reinforced plastic rod, a carbon fiber reinforced plastic rod; the shape can be round, flat, fan-shaped or other special-shaped structures. The number of layers of the armor tube 12 may be one, two, or more.

The buffer layer 13 forms a plurality of buffer grooves 132, each buffer groove 132 is located between two buffer parts 131, and the plurality of buffer parts 131 are uniformly distributed along the periphery of the armor tube 12 with the center of the armor tube 12 as the center of circle, so as to form the buffer grooves 132 which are uniformly distributed, and provide space for deformation of the plurality of buffer parts 131. In one embodiment, the buffer portions 131 have a cross section in the shape of an isosceles triangle, one vertex of the triangle is disposed near the outer sheath 14, and the other two vertices are disposed near the sheathing tube 12, so that each buffer portion 131 can bear a uniform pressure, and the arrangement of wiring is facilitated. Each of the buffer portions 131 includes a reinforcing member 133, and the reinforcing member 133 may be kevlar with high strength, placed in a triangular cross section. Thus, the buffer layer 13 not only can provide a deformation space for the 5G optical cable 10, but also can make the buffer layer 13 bear high and light tension.

The outer sheath 14 surrounds the buffer layer 13 and is used for protecting the buffer layer 13 and the cable core 11. The friction coefficient of the outer sheath 14 is lower than 0.1, and the outer sheath is made of low-smoke halogen-free materials. Due to the low friction coefficient of the outer sheath 14, the 5G optical cable 10 can be conveniently arranged in a pipeline and wired.

Referring to fig. 2, the present invention further provides a preparation method of the 5G optical cable, which includes the following steps.

Step S20: and (3) installing a plurality of colored optical fibers and water-blocking yarns on an optical fiber pay-off rack, adjusting the pay-off tension of the optical fiber pay-off rack to be 0.6-0.8N, and drawing the plurality of colored optical fibers and water-blocking yarns out to the machine head of the plastic extruding machine.

Step S21: providing a hot water tank, a warm water tank and a cold water tank, and setting the temperatures of the hot water tank, the warm water tank and the cold water tank to be preset temperatures.

Step S22: the processing temperature of the extruder is set to a first preset temperature and a first extrusion die is installed. In one embodiment, the first predetermined temperature is 140 ℃ to 170 ℃.

Step S23: and moving the optical fibers and the water blocking yarns to a first extrusion molding die, and carrying out extrusion molding processing on the low-smoke halogen-free material through an extrusion molding machine so as to form an inner jacket on the peripheries of the optical fibers and the water blocking yarns. Because the extrusion molding in-process, through multisection basin, cool off more to the sheath, can reduce the shrink nature of inner sheath. The inner sheath is free of bamboo joints, pockmarks, stripping and end face concentricity in appearance, and comprises optical fibers and water-stopping yarns, and the inner sheath is watertight.

Specifically, at extrusion molding processing the inner sheath in-process, sample the preset distance to the inner sheath of shaping play, like 4 meters, cut off the inner sheath of sample into two parts, like 1 meter's inner sheath and 3 meters's inner sheath. The inner sheath is manually inspected for satisfactory appearance quality for 1 meter samples and for manual withdrawal of the optical fiber from the inner sheath. The appearance quality comprises no bamboo joints, no pockmarks, no stripping, qualified concentricity of end faces and the like. The 3 m inner jacket sampled was used for water penetration tests at 1 m water column and maintained for twenty-four hours to ensure that the prepared 5G cable was watertight. When the appearance quality of the inner sheath does not meet the requirement or the optical fiber cannot be manually drawn out of the inner sheath or water is leaked, the extrusion molding pressure and the extrusion molding die position of the inner sheath are reset until the appearance quality of the inner sheath meets the requirement, the optical fiber can be manually drawn out of the inner sheath, and the inner sheath is watertight.

Step S24: and sleeving the inner sheath on a unit pay-off rack, adjusting the pay-off tension to be 2-3N, and drawing the inner sheath to the head of the armoring machine.

Step S25: and spirally twisting and armoring the stainless steel wires into a spiral armoring pipe which surrounds the periphery of the inner sheath by an armoring machine. The inner diameter of the spiral armored pipe is 1.0 +/-0.1 millimeter, and the outer diameter of the spiral armored pipe is 1.2 +/-0.1 millimeter. When the inner sheath in the spiral armor pipe is pinched to enable the spiral armor pipe to be vertically downward, the spiral armor pipe can be freely separated.

Step S26: and (3) mounting the spiral armor pipe on a unit pay-off rack, adjusting the pay-off tension to be 3-4N, and drawing the spiral armor pipe out to the head of the extruding machine.

Step S27: the Kevlar aramid fiber is installed on an aramid fiber pay-off rack, the pay-off tension is adjusted to be 2-3N, and the reinforcing piece is pulled out of the machine head.

Step S28: the processing temperature of the extruder is set to a second preset temperature and a second extrusion die is assembled. The second preset temperature is 140-150 ℃.

Step S29: and penetrating the spiral armor tube and Kevlar aramid into a second extrusion molding die and forming a buffer layer surrounding the periphery of the spiral armor tube by extrusion molding of an extruding machine, wherein the buffer layer comprises a deformable buffer part and forms a buffer groove positioned on one side of the buffer part. In an embodiment, the buffer layer forms a plurality of buffer grooves, each buffer groove is located between two buffer parts, and the plurality of buffer parts are uniformly distributed along the periphery of the armor tube by taking the center of the armor tube as a circle center, so as to form the buffer grooves with uniform distribution. The cross section of the buffer part is in an isosceles triangle shape, and two vertexes of the triangle are close to the armor tube.

Step S30: and installing the buffer layer on a unit pay-off rack, adjusting the pay-off tension to be 3-4N, and drawing the buffer layer out to the machine head of the extruding machine.

Step S31: the processing temperature of the extruder is set to a third preset temperature and a third extrusion die is assembled. The third preset temperature is 140-160 ℃.

Step S32: the buffer layer is threaded into a third extrusion die and extruded through an extruder into an outer jacket surrounding the buffer layer. In one embodiment, the outer sheath has a coefficient of friction of less than 0.1 and is made of a low smoke zero halogen material.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present application and are not to be taken as limiting the present application, and that suitable changes and modifications of the above embodiments are within the scope of the disclosure claimed in the present application as long as they are within the spirit and scope of the present application.

Claims

1. The 5G optical cable comprises a cable core, an armored pipe and an outer sheath, and is characterized by further comprising a buffer layer, wherein the buffer layer is arranged between the armored pipe and the outer sheath, the buffer layer comprises a deformable buffer part and a buffer groove located on one side of the buffer part, and the buffer groove is used for providing a space for deformation of the buffer layer when the 5G optical cable is extruded.

2. The 5G fiber optic cable of claim 1, wherein: the number of the buffer grooves is multiple, each buffer groove is located between two buffer parts, and the buffer parts are uniformly distributed along the periphery of the armor pipe by taking the center of the armor pipe as a circle center.

3. The 5G fiber optic cable of claim 2, wherein: the cross section of the buffer part is triangular, one vertex of the triangle is close to the outer sheath, and the other two vertices are close to the armor tube.

4. The 5G fiber optic cable of claim 3, wherein: the cross section of buffer portion is isosceles triangle.

5. The 5G fiber optic cable of claim 3, wherein: the buffer part comprises Kevlar aramid fiber.

6. The 5G fiber optic cable of claim 1, wherein: the cable core comprises an inner sheath, a plurality of optical fibers and a water blocking piece, wherein the optical fibers and the water blocking piece are arranged in the inner sheath, and the water blocking piece is used for preventing water from entering the cable core.

7. A preparation method of a 5G optical cable comprises the following steps:

8. The method for preparing 5G optical cable according to claim 7, further comprising the step of, during the extrusion process of the low smoke zero halogen material in the extruder:

9. The method for preparing 5G optical cable according to claim 7, wherein the first preset temperature is 140 ℃ to 170 ℃, the second preset temperature is 140 ℃ to 150 ℃, and the third preset temperature is 140 ℃ to 160 ℃.

10. The method for preparing a 5G optical cable according to claim 7, wherein: the friction coefficient of the outer sheath is lower than 0.1, and the outer sheath is made of low-smoke halogen-free materials.