WO2018133477A1

WO2018133477A1 - Method for manufacturing optical cable with wrapping yarn automatically unwinding under heat

Info

Publication number: WO2018133477A1
Application number: PCT/CN2017/107936
Authority: WO
Inventors: 王珑; 喻琴; 胡国华; 祁庆庆; 陈黎明; 付凯
Original assignee: 烽火通信科技股份有限公司
Priority date: 2017-01-20
Filing date: 2017-10-27
Publication date: 2018-07-26
Also published as: CN107045171A

Abstract

Disclosed is a method for manufacturing an optical cable with wrapping yarn (6) automatically unwinding under heat, which relates to the technical field of optical communications and comprises the following steps: S1, selecting a composite material which automatically unwinds at a temperature of 120-140ºC and preparing same into wrapping yarn (6); S2, extrusion moulding loose tubes (5) outside a plurality of coloured optical fibres by means of an extruder; S3, twisting a plurality of loose tubes (5) around a central reinforcement member (4), winding wrapping yarn (6) which automatically unwinds under heat on the periphery of all the loose tubes (5) to form a cable core (1); S4, coating an armour layer (2) on an outer layer of the cable core (1); and S5, extrusion moulding an outer sheath layer (3) outside the armour layer (2), and the wrapping yarn (6) of the cable core (1) automatically unwinding under heat, thus forming an optical cable with wrapping yarn (6) automatically unwinding under heat. Since the wrapping yarn (6) unwinds while extrusion moulding the outer sheath layer (3), a tube which is slightly flattened by the wrapping yarn (6) can automatically return to its original shape, thus improving the defect of excessive attenuation of optical cables in the prior art caused by wrapping yarn flattening loose tubes.

Description

Method for manufacturing cable yarn heat-absorbing automatic chain dissolving optical cable

Technical field

The present invention relates to the field of optical communication technologies, and in particular, to a method for manufacturing a cable-heating automatic chain-dissolving optical cable.

Background technique

At present, the commonly used optical cable will be bundled with SZ strands in the stranding process to form a cable core outside the loose tube. In the sheathing process, after the outer layer of the core is wrapped with the armor layer, an outer sheath is extruded. The layers form an optical cable. The disadvantage of the conventional cable structure is that the tying yarn is only used for tying the loose tube in the stranding process. Once the tying yarn is too tightly tied, the loose tube is easily flattened, so that the fiber in the loose tube is attenuated due to being squeezed. If the fiber exceeds the standard and the attenuation exceeds the standard, the fiber is wrapped by the outer sheath layer and further tightened and squeezed, so that the fiber cannot be restored or restored to a normal attenuation level, thereby affecting subsequent communication applications. In addition, during the construction of the optical cable line, the outer sheath of the optical cable is stripped, the armor layer and the tying yarn are removed, and then the optical fiber is peeled off to perform the line welding. The presence of the skein reduces the efficiency of the cable stripping and the optical fiber fusion, thereby affecting the overall construction. effectiveness.

Summary of the invention

In view of the defects existing in the prior art, the object of the present invention is to provide a method for manufacturing an automatic chain-dissolving optical cable for tying the yarn, and to improve the disadvantage that the existing optical fiber is attenuated due to the flattening of the loosened sleeve, and Convenient cable stripping and fiber fusion.

In order to achieve the above object, the technical solution adopted by the present invention is: a method for manufacturing a cable-wound thermal chain-removing optical cable, comprising the following steps:

S1, which is made of a composite material which is automatically chain-dissolved at a temperature of 120-140 ° C;

S2, extruded by an extruder outside the plurality of colored fibers to form a loose tube;

S3, stranding the plurality of loose tubes around the center reinforcement member, and winding the cable with the heat-automatic chain solution on the periphery of all the loose sleeves to form a cable core;

S4, covering the outer layer of the cable core with an armor layer;

S5, extruding the outer sheath layer outside the armor layer, and the cable tying of the cable core is automatically disassembled by heat to form an automatic chain-dissolving optical cable for the skein.

Based on the above technical solution, the composite material is a polyolefin or a polyester.

On the basis of the above technical solution, step S2 comprises stranding a plurality of filling ropes and a loose tube around the central reinforcing member, and winding the cable strands of the hot chain to form a cable core around all the filling ropes and the loose tube. .

Based on the above technical solution, the loose tube includes 1-12 colored optical fibers.

Based on the above technical solution, the cable core includes 1-12 loose tubes.

Based on the above technical solution, the central reinforcement member is a steel wire, a steel wire rope or a fiber reinforced composite material.

Based on the above technical solution, the fiber reinforced composite material is an aramid fiber reinforced composite material or a glass fiber reinforced composite material.

Based on the above technical solution, the armor layer is a steel belt spiral armor layer, an aluminum belt spiral armor layer or a stainless steel belt spiral armor layer.

Based on the above technical solution, the outer sheath layer is a polyethylene layer, a nylon layer, a low-smoke halogen-free layer or a polyurethane layer.

The advantages of the present invention over the prior art are:

The cable core of the wire-spinning automatic chain-dissolving optical cable of the invention is provided with the heat-chain-dissolving tying yarn, and the cable core bundled by the tying yarn is inserted into the outer casing layer of the extruder to form the outer sheath layer. In the case of automatic chain disintegration, the cable core is covered by an outer sheath to form a fiber optic cable. Since the skein is chain-extracted when the outer sheath layer is extruded, the sleeve that was previously slightly flattened by the skein can automatically restore its original shape and improve the present There is a disadvantage that the fiber is loosened due to the slack of the loose tube and the attenuation is exceeded.

At the same time, during the construction of the optical cable line, it is not necessary to peel off the outer sheath of the optical cable to remove the skein, facilitate the stripping of the optical cable and the fusion of the optical fiber, and improve the construction efficiency of the optical cable link, and is particularly suitable for the micro optical cable.

DRAWINGS

1 is a schematic flow chart of a method for manufacturing a wire-wrap automatic chain-removing optical cable according to an embodiment of the present invention;

2 is a schematic structural view of an automatic chain-dissolving optical fiber cable in accordance with an embodiment of the present invention (when the yarn is unchained).

In the figure: 1-cable, 2-armor layer, 3-outer sheath layer, 4-center reinforcement, 5-loose sleeve, 6-zag, 7-filled rope.

detailed description

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

Referring to FIG. 1 , an embodiment of the present invention provides a method for manufacturing a cable-wound automatic chain-removing optical cable, which includes the following steps:

S1, using a composite material which is automatically chain-dissolved at a temperature of 120-140 ° C to form a skein 6;

S2, extruded by an extruder outside the plurality of colored fibers to form a loose tube 5;

S3, the plurality of loose tubes 5 are stranded around the central reinforcement 4, and the cable 1 is wound around the outer edge of all the loose tubes 5 to form a cable core 1;

S4, as shown in Figure 2, the outer layer of the core 1 is covered with an armor layer 2;

S5, the outer sheath layer 3 is extruded outside the armor layer 2, and the tying yarn 6 of the cable core 1 is automatically chain-disassembled by heat to form a heat-spinning automatic optical cable. The fibrous material is a polyolefin or a polyester.

Different jacket materials, the corresponding extrusion temperature is also different, will be higher than 140 ° C. For example, when the outer sheath layer 3 is low-smoke halogen-free (LSZH), the extrusion temperature is usually 150-160 ° C; when the outer sheath layer 3 is polyethylene (PE), the extrusion temperature is usually about 200 ° C. When the outer sheath layer 3 is a polyamide (PA), the extrusion temperature is usually 200 ° C or higher.

When the number of loose tubes 5 in the core 1 is small, step S2 comprises stranding a plurality of filling strands 7 and loose tubes 5 around the central reinforcement 4, at all filling ropes 7 and loose tubes 5 The outer winding is wound with the heat strand to form the cable core 1.

The loose tube 5 includes 1-12 colored fibers. The cable core 1 includes 1-12 loose tubes 5 therein. The central reinforcement 4 is a steel wire, a wire rope or a fiber reinforced composite material. The fiber reinforced composite material is an aramid fiber reinforced composite material or a glass fiber reinforced composite material. The armor layer 2 is a steel strip spiral armor layer 2, an aluminum strip spiral armor layer 2 or a stainless steel belt spiral armor layer 2. The outer sheath layer 3 is a polyethylene layer, a nylon layer, a low-smoke halogen-free layer or a polyurethane layer.

For example, include the following steps:

S1: 1~12 colored fibers are released from the fiber optic pay-off rack, and the tension of the fiber optic pay-off rack is controlled by a programmable logic controller in the range of 50-160 g to ensure a suitable fiber length. The colored fiber is passed through the extruder head while the secondary coating material is extruded into an extruder to form a loose tube 5.

S2: The loose tube 5 is separately cooled by hot water, warm water and cold water, and the outer diameter of the loose tube 5 produced by the infrared caliper is monitored by the infrared caliper; the outer diameter of the loose tube 5 is sprayed by the ink jet printer. The upper coding is convenient for distinguishing and confirming in the subsequent application process, and the loosening sleeve 5 is closed by the wire take-up device. Adjust the take-up tension in the range of 50-160g to ensure the take-up speed, and the loose tube 5 of the stock will not be excessively squeezed.

S3: 1 to 12 loose tubes 5 are twisted around the center reinforcement 4 and placed on the pay-off frame, and the tension of the pay-off frame is set in the range of 50-160 g; the skein 6 is bundled with SZ in the twisted pair. The central reinforcing member 4 and the loose tube 5 are externally formed with a core 1. When the loose tube 5 When the number is small, the filler rope 7 is twisted together with the loose tube 5 to ensure the roundness of the core 1. The tension of the take-up thread is adjusted in the range of 50 to 160 g to ensure the wire take-up speed, and the core 1 of the disk is not excessively squeezed.

S4: the core 1 is placed on the pay-off frame, the tension of the pay-off frame is set in the range of 50-160 g; the outer layer of the core 1 is covered with the armor layer 2;

S5: adding the outer sheath material to the extruder, extruding the outer sheath material in the armor layer 2 to form the outer sheath layer 3; the skein 6 is automatically chain-coupled by heat, and the formed optical cable will not contain the tying yarn 6; The hot water, warm water and cold water are cooled step by step, and after drying and printing, the tray is closed to form an automatic chain-dissolving optical cable.

The present invention is not limited to the above embodiments, and those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. These improvements and retouchings are also considered as protection of the present invention. Within the scope. The contents not described in detail in the present specification belong to the prior art well known to those skilled in the art.

Claims

The invention relates to a method for manufacturing a cable-sand thermal chain-removing optical cable, which comprises the following steps:

S1, using a composite material which is automatically chain-dissolved at a temperature of 120-140 ° C to make a skein (6);

S2, extruded by an extruder outside the plurality of colored fibers to form a loose tube (5);

S3, stranding a plurality of loose tubes (5) around the central reinforcing member (4), winding a braided yarn (6) on the periphery of all the loose tubes (5) to form a cable core (1) ;

S4, covering the outer layer of the cable core (1) with an armor layer (2);

S5, extruding the outer sheath layer (3) outside the armor layer (2), the cable (6) of the cable core (1) is automatically disassembled by heat to form a tying yarn (6) heat-distributing automatic chain-dissolving optical cable .
A method of manufacturing a wire-wound automatic chain-dissolving optical cable according to claim 1, wherein said composite material is polyolefin or polyester.
A method of manufacturing a cable-spun thermal chain-removing optical cable according to claim 1, wherein the step S2 comprises twisting the plurality of filling ropes (7) and the loose tube (5) together at the center to strengthen Around the piece (4), the cable (1) is formed by winding the strands (6) which are subjected to the heat chain at the periphery of all the filling ropes (7) and the loose tubes (5).
The method of manufacturing a wire-wound automatic chain-removing optical cable according to claim 1, wherein the loose tube (5) comprises 1-12 colored fibers.
A method of manufacturing a cable-splitting automatic chain-dissolving optical cable according to claim 1, wherein said cable core (1) comprises 1-12 loose tubes (5).
A method of manufacturing a wire-wound thermal chain-removing optical cable according to claim 1, wherein said center reinforcing member (4) is a steel wire, a steel wire rope or a fiber reinforced composite material.
A method for manufacturing a cable-sand thermal chain-removing optical cable according to claim 1 The method is characterized in that the fiber reinforced composite material is an aramid fiber reinforced composite material or a glass fiber reinforced composite material.
The method for manufacturing a wire-wound automatic chain-removing optical cable according to claim 1, wherein the armor layer (2) is a steel band spiral armor layer (2), and the aluminum tape spiral armor Layer (2) or stainless steel with spiral armor layer (2).
The method for manufacturing a cable-spun thermal chain-dissolving optical cable according to claim 1, wherein the outer sheath layer (3) is a polyethylene layer, a nylon layer, a low-smoke halogen-free layer or a polyurethane. Floor.