Composite armored optical cable and preparation device and method thereof

Abstract

The present application relates to the technical field of optical cable preparation, and particularly relates to a composite armored optical cable and a preparation device and method thereof, comprising: a central optical fiber; a stainless steel tube sleeved on the outer periphery of the central optical fiber and filled with a fiber paste in the inside; an adhesion layer covering the outer periphery of the stainless steel tube; a fiber reinforced composite material layer covering the outer periphery of the adhesion layer; and a protective sleeve sleeved on the outer periphery of the fiber reinforced composite material layer. The composite armored optical cable has good lateral bending resistance, can realize continuous production, and can balance "lightweighting-high strength-corrosion resistance-continuous production".

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical cable preparation, and in particular to a composite armored optical cable and a preparation device and method thereof. BACKGROUND

[0002] With the rapid development of 5G communication, ocean observation and smart grid, optical fiber cables need to maintain long-term reliability under complex mechanical stress (such as lateral pressure, impact) and harsh environment (high salt fog, strong electromagnetic interference). However, the traditional optical fiber cable has the following problems: first, the lateral pressure resistance is weak, and it cannot resist rock extrusion or high pressure in deep sea, and the failure rate in direct burial scene is high; second, it is difficult to balance "lightweight-high strength-corrosion resistance-continuous production", and it cannot meet the continuous production demand of high-reliability and lightweight optical cable.

[0003] Therefore, how to improve the lateral pressure resistance of the optical cable and realize the continuous production of high-reliability and lightweight optical cable has become a technical problem to be solved by the technical personnel in the field. SUMMARY

[0004] The present application provides a composite armored optical cable and a preparation device and method thereof, to solve the technical problem of how to improve the lateral pressure resistance of the optical cable and realize the continuous production of high-reliability and lightweight optical cable.

[0005] In a first aspect, the present application provides a composite armored optical cable, comprising:

[0006] a central optical fiber;

[0007] a stainless steel tube sleeved on the outer periphery of the central optical fiber, filled with a fiber paste inside;

[0008] an adhesion layer covering the outer periphery of the stainless steel tube;

[0009] a fiber-reinforced composite material layer covering the outer periphery of the adhesion layer;

[0010] a protective sleeve sleeved on the outer periphery of the fiber-reinforced composite material layer.

[0011] In some embodiments, the fiber-reinforced composite material layer is composed of glass fiber, carbon fiber and resin matrix.

[0012] In a second aspect, the present application further provides a preparation method of a composite armored optical cable, comprising the following steps:

[0013] Step one: wrapping the central optical fiber with a stainless steel strip, injecting a fiber paste, and then welding the stainless steel strip into a stainless steel tube to obtain a fifth pre-cable core;

[0014] Step two: cleaning the outer surface of the fifth pre-cable core, spraying a coupling agent, and drying to obtain an eighth pre-cable core;

[0015] Step three: coating the outer periphery of the eighth preformed cable core with glass fiber and carbon fiber, and then immersing it in a resin matrix, shaping, curing, and cooling to obtain a thirteenth preformed cable core;

[0016] Step four: coating the outer periphery of the thirteenth preformed cable core with a protective sleeve to obtain the composite armored optical cable.

[0017] In some embodiments, step one includes:

[0018] S1: winding a stainless steel strip around a stainless steel pipe coil;

[0019] S2: straightening the stainless steel strip along the axial direction using a straightening guide rail to obtain a straight steel strip;

[0020] S3: using a steel strip shaping mold to curl the straight steel strip into an arc-shaped accommodation groove along the radial direction to obtain an arc-shaped steel strip;

[0021] S4: using a guide wheel to guide the central optical fiber into the accommodation groove of the arc-shaped steel strip to obtain a first preformed cable core;

[0022] S5: using a fiber paste injector to inject fiber paste into the first preformed cable core to obtain a second preformed cable core;

[0023] S6: using a sizing die to butt joint the two side edges of the steel strip in the second preformed cable core during shaping, and curling it into a steel pipe with the same outer diameter to obtain a third preformed cable core;

[0024] S7: using a laser welding machine to weld the butt joint of the steel strip in the third preformed cable core to obtain a fourth preformed cable core;

[0025] S8: using a steel pipe straightening machine to straighten the fourth preformed cable core along the axial direction to obtain a fifth preformed cable core.

[0026] In some embodiments, step two includes:

[0027] (1) using a plasma cleaning machine to clean the surface of the fifth preformed cable core to obtain a sixth preformed cable core;

[0028] (2) using a coupling agent spraying machine to uniformly spray a coupling agent on the outer periphery of the sixth preformed cable core to obtain a seventh preformed cable core;

[0029] (3) using an infrared drying machine to dry the surface of the seventh preformed cable core to obtain an eighth preformed cable core.

[0030] In some embodiments, step three includes:

[0031] Step 1: the eighth pre-cable core is transported to a fiber yarn feeder by a conveyor, and carbon fibers and glass fibers are wound on the outer periphery of the eighth pre-cable core by the fiber yarn feeder to obtain a ninth pre-cable core;

[0032] Step 2: the ninth pre-cable core is immersed in a resin matrix by a resin impregnation tank to obtain a tenth pre-cable core;

[0033] Step 3: the tenth pre-cable core is extruded into a circular shape by a pultrusion die to obtain an eleventh pre-cable core;

[0034] Step 4: the eleventh pre-cable core is heated and cured by a curing oven to obtain a twelfth pre-cable core;

[0035] Step 5: the twelfth pre-cable core is cooled by a cooling water tank to obtain a thirteenth pre-cable core.

[0036] In some embodiments, step four comprises:

[0037] The outer periphery of the thirteenth pre-cable core is covered with a protective sleeve to obtain the composite armored optical cable.

[0038] In a third aspect, the application further provides a preparation device for a composite armored optical cable, which adopts the preparation method of the composite armored optical cable.

[0039] A steel pipe coating assembly is used for coating a stainless steel belt around a central optical fiber, injecting a fiber paste, and welding the stainless steel belt into a stainless steel pipe to obtain a fifth pre-cable core;

[0040] A steel pipe surface treatment assembly is used for cleaning, spraying a coupling agent, and drying the outer surface of the fifth pre-cable core to obtain an eighth pre-cable core;

[0041] A composite material coating assembly is used for coating glass fibers and carbon fibers around the outer periphery of the eighth pre-cable core, and then immersing the eighth pre-cable core in a resin matrix, and then forming, curing, and cooling to obtain a thirteenth pre-cable core;

[0042] A sleeving assembly is used for sleeving a protective sleeve around the outer periphery of the eighth pre-cable core to obtain the composite armored optical cable.

[0043] In some embodiments, the steel pipe coating assembly comprises, along the movement direction of the stainless steel belt:

[0044] A stainless steel pipe disc, a straightening guide rail, a steel belt sizing die, a guide wheel, a fiber paste injector, a sizing die, a laser welding machine, and a steel pipe straightening machine.

[0045] In some embodiments, the steel pipe surface treatment assembly comprises:

[0046] A plasma cleaning machine, a coupling agent spraying machine, and an infrared drying machine.

[0047] The composite material coating assembly comprises a conveyor, a fiber yarn feeding rack, a resin impregnation tank, a pultrusion die, a curing oven and a cooling water tank.

[0048] The beneficial effects of the present application are as follows:

[0049] 1. The composite armored optical cable provided by the present application, by sleeving a fiber reinforced composite material layer on the outer periphery of the stainless steel pipe and applying an adhesive layer between the stainless steel pipe and the fiber reinforced composite material layer, on the one hand, there is a good bonding and synergistic working mechanism between the stainless steel pipe and the fiber reinforced composite material layer, when the composite optical cable is subjected to external force, the stainless steel pipe and the fiber reinforced composite material layer will deform together, due to the difference in elastic modulus and strength between the two, they will share different proportions of stress according to their mechanical properties. The stainless steel pipe transmits part of the stress to the fiber reinforced composite material layer through the interaction with the fiber reinforced composite material layer, and also obtains the reaction force from the fiber reinforced composite material layer, so that the stress is more widely dispersed between the two materials, further improving the stress dispersion capacity and damage resistance of the composite structure, and further improving the lateral bending resistance of the composite optical cable; on the other hand, the adhesion between the stainless steel pipe and the fiber reinforced composite material layer is improved through the adhesive layer, which promotes the stress transmission and dispersion process between the stainless steel pipe and the fiber reinforced composite material layer, further improving the lateral bending resistance of the composite optical cable;

[0050] 2. The preparation method of the composite armored optical cable provided by the present application, the prepared composite optical cable is light in weight, high in strength, excellent in electromagnetic shielding performance and high in reliability, can realize continuous production, can balance "light weight-high strength-corrosion resistance-continuous production", and meets the continuous production demand of high reliability and light weight optical cable. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 is a schematic diagram of the overall structure of a composite armored optical cable of the present application;

[0052] Figure 2 is a schematic diagram of the steel pipe coating assembly and the steel pipe surface treatment assembly in the preparation device of a composite armored optical cable of the present application;

[0053] Figure 3 is a schematic diagram of the steel pipe surface treatment assembly in the preparation device of a composite armored optical cable of the present application.

[0054] In the drawings, 1, central optical fiber; 2, stainless steel tube; 3, fiber paste; 4, adhesive layer; 5, fiber reinforced composite material layer; 6, protective sleeve; 7, stainless steel tube disc; 8, straightening guide rail; 9, sizing die; 10, guide wheel; 11, fiber paste injector; 12, sizing die; 13, laser welding machine; 14, steel tube straightening machine; 15, plasma cleaning machine; 16, coupling agent spraying machine; 17, infrared drying machine; 18, conveyor; 19, fiber yarn rack; 20, resin impregnation tank; 21, pultrusion die; 22, curing oven; 23, cooling water tank. DETAILED DESCRIPTION

[0055] The technical solutions of the present application will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0056] As described in the background, based on the traditional optical fiber cable, there are the following problems: first, the lateral pressure resistance is weak, and it cannot resist rock extrusion or high pressure in deep sea, and the failure rate of direct buried scene is high; second, it is difficult to balance "lightweight-high strength-corrosion resistance-continuous production", and it cannot meet the continuous production demand of high reliable and lightweight optical cable. Therefore, how to improve the lateral pressure resistance of the optical cable and realize the continuous production of high reliable and lightweight optical cable become technical problems to be solved by those skilled in the art.

[0057] To solve the above problems, referring to Figure 1 , Figure 2 and Figure 3 , in a first aspect, the present application provides a composite armored optical cable, comprising: a central optical fiber 1, a stainless steel tube 2, an adhesive layer 4, a fiber reinforced composite material layer 5 and a protective sleeve 6, the stainless steel tube 2 is sleeved on the outer periphery of the central optical fiber 1, and the stainless steel tube 2 is filled with fiber paste 3; the adhesive layer 4 covers the outer periphery of the stainless steel tube 2; the fiber reinforced composite material layer 5 covers the outer periphery of the adhesive layer 4; and the protective sleeve 6 is sleeved on the outer periphery of the fiber reinforced composite material layer 5. Preferably, the fiber reinforced composite material layer 5 is composed of glass fiber, carbon fiber and resin matrix.

[0058] The composite armored optical cable of the present application forms a gradient composite structure: the inner layer is a 316L stainless steel tube (thickness 0.1-0.2mm, fiber paste filling amount 85%-95%) sealed by laser welding, the outer layer of the steel tube is a silane coupling agent adhesive layer (thickness 5-20μm, interfacial shear strength ≥15MPa) coated after plasma activation, the middle layer is a high-strength glass fiber / carbon fiber mixed FRP layer (volume content ≥60%), and the outer layer is a polyethylene protective sleeve 6, forming a metal / non-metal synergistic reinforcement system.

[0059] The composite armored optical cable provided by the application coats a fiber-reinforced composite material layer 5 on the outer periphery of the stainless steel tube 2 and applies an adhesive layer 4 between the stainless steel tube 2 and the fiber-reinforced composite material layer 5. On the one hand, the adhesive layer 4 improves the adhesion and reliability between the stainless steel tube 2 and the fiber-reinforced composite material layer 5, avoiding relative sliding between the stainless steel tube 2 and the fiber-reinforced composite material layer 5 during lateral force and bending and torsion. On the other hand, there is a good bonding and cooperative working mechanism between the stainless steel tube 2 and the fiber-reinforced composite material layer 5. When the composite optical cable is subjected to external force, the stainless steel tube 2 and the fiber-reinforced composite material layer 5 will deform together. Because the elastic modulus and strength of the two are different, they will share different proportions of stress according to their mechanical properties. The stainless steel tube 2 transmits part of the stress to the fiber-reinforced composite material layer 5 through the interaction with the fiber-reinforced composite material layer 5, and also obtains the reaction force from the fiber-reinforced composite material layer 5, so that the stress is more widely dispersed between the two materials, further improving the stress dispersion capacity and damage resistance of the composite structure, and further improving the lateral bending resistance of the composite optical cable.

[0060] In a second aspect, the application further provides a preparation method of the composite armored optical cable, comprising the following steps:

[0061] Step one: a stainless steel tape is used to cover the central optical fiber 1, and a fiber paste 3 is injected, and then the stainless steel tape is welded into a stainless steel tube 2 to obtain a fifth pre-cable core;

[0062] Step two: the outer surface of the fifth pre-cable core is cleaned, a coupling agent is sprayed, and then dried to obtain an eighth pre-cable core;

[0063] Step three: glass fibers and carbon fibers are wrapped around the outer periphery of the eighth pre-cable core, and then immersed in a resin matrix, and then molded, cured and cooled to obtain a thirteenth pre-cable core;

[0064] Step four: a protective sleeve 6 is wrapped around the outer periphery of the thirteenth pre-cable core to obtain the composite armored optical cable.

[0065] In some embodiments, the preparation method of the composite armored optical cable comprises the following steps:

[0066] S1: a stainless steel tube is used to wind a stainless steel tape;

[0067] S2: a straightening guide rail 8 is used to straighten the stainless steel tape in the axial direction to obtain a straight steel tape;

[0068] S3: a steel tape shaping mold 9 is used to curl the straight steel tape into an arc-shaped accommodation groove in the radial direction to obtain an arc-shaped steel tape;

[0069] S4: the center optical fiber is introduced into the accommodating groove of the arc-shaped steel belt by using the guide wheel 10, to obtain a first preformed cable core;

[0070] S5: the fiber paste is injected into the first preformed cable core by using the fiber paste injector 11, to obtain a second preformed cable core;

[0071] S6: the two side edges of the steel belt in the forming of the second preformed cable core are butted by using the sizing die 12, and are curled into a steel pipe with the same outer diameter, to obtain a third preformed cable core;

[0072] S7: the butt joint of the steel belt in the third preformed cable core is welded by using the laser welding machine 13, to obtain a fourth preformed cable core;

[0073] S8: the fourth preformed cable core is straightened along the axial direction by using the steel pipe straightening machine 14, to obtain a fifth preformed cable core;

[0074] S9: the surface of the fifth preformed cable core is cleaned by using the plasma cleaning machine 15, to obtain a sixth preformed cable core;

[0075] S10: the coupling agent is uniformly sprayed on the outer periphery of the sixth preformed cable core by using the coupling agent spraying machine 16, to obtain a seventh preformed cable core;

[0076] S11: the surface of the seventh preformed cable core is dried by using the infrared drying machine 17, to obtain an eighth preformed cable core;

[0077] S12: the eighth preformed cable core is transported to the fiber yarn feeding frame 19 by using the conveyor 18, and the carbon fiber and the glass fiber are wound on the outer periphery of the eighth preformed cable core by using the fiber yarn feeding frame 19, to obtain a ninth preformed cable core;

[0078] S13: the ninth preformed cable core is immersed into the resin matrix by using the resin dipping tank 20, to obtain a tenth preformed cable core;

[0079] S14: the tenth preformed cable core is extruded into a circular shape by using the pultrusion die 21, to obtain an eleventh preformed cable core;

[0080] S15: the eleventh preformed cable core is heated and cured by using the curing furnace 22, to obtain a twelfth preformed cable core;

[0081] S16: the twelfth preformed cable core is cooled by using the cooling water tank 23, to obtain a thirteenth preformed cable core;

[0082] S17: the thirteenth preformed cable core is wound and stored by using the traction winding machine;

[0083] S18: the thirteenth preformed cable core is sleeved with a protective sleeve, to obtain a composite armored optical cable.

[0084] In some embodiments, the fiber optic cable release machine releases the central fiber 1 to the guide wheel 10 with constant tension. The guide wheel 10 guides the central fiber 1 into the center line of the sizing mold 12. The stainless steel strip is leveled by the straightening guide rail 8 and then transported to the sizing mold 12, thereby achieving synchronous protection between the central fiber 1 and the stainless steel strip.

[0085] In some embodiments, a stainless steel strip wraps around the central optical fiber 1 in a sizing mold 12 to form a U-shaped groove, and the edges are continuously welded into a closed steel pipe by a laser welding machine 13. At the same time as welding, the fiber grease injector 11 dynamically injects the grease through the tail end of the steel pipe. The injection pressure and welding speed are linked and controlled to improve the consistency and synchronization of fiber grease injection and steel pipe welding.

[0086] In some embodiments, the welded steel pipe is calibrated in size by a sizing and straightening device, and the welding parameters are adjusted by feedback from a surface roughness tester.

[0087] In some embodiments, the fiber feeding frame 19 releases high-strength glass fiber and carbon fiber, which enter the resin impregnation tank 20 simultaneously with the stainless steel tube; the resin matrix, preferably epoxy resin or vinyl ester, is kept viscous within the resin impregnation tank 20 by a circulating pump.

[0088] In some embodiments, the impregnated composite enters a pultrusion die 21, which includes a preheating zone and a high-temperature curing zone. The die pressure is used to expel air bubbles and compact the fibers. The curing oven 22 performs secondary curing on the initial fiber-reinforced composite material layer 5 to ensure the degree of resin crosslinking.

[0089] In some embodiments, the traction winding machine synchronously controls the linear speed of the stainless steel tube 2 and the fiber-reinforced composite material layer 5 through a servo motor to avoid interlayer delamination caused by tension fluctuations.

[0090] In some embodiments, after welding, the stainless steel pipe enters a plasma cleaner 15 to remove surface oxides in an argon atmosphere, generating active -OH groups; a coupling agent spraying machine 16 uniformly sprays silane coupling agent onto the outer surface of the steel pipe, with a coating thickness of 5-20 μm; an infrared drying oven rapidly cures the coupling agent, forming a transition layer chemically bonded to the fiber-reinforced composite material layer 5.

[0091] The method for preparing composite armored optical cables provided by this invention produces composite optical cables that are lightweight, high-strength, have excellent electromagnetic shielding performance, and high reliability. It enables continuous production and can balance "lightweight, high-strength, corrosion-resistant, and continuous production," meeting the continuous production requirements for high-reliability, lightweight optical cables.

[0092] Thirdly, the present invention also provides an apparatus for preparing a composite armored optical cable, using the above-mentioned method for preparing a composite armored optical cable, wherein the apparatus comprises:

[0093] A steel pipe coating assembly is used for coating a central optical fiber 1 with a stainless steel tape, injecting a fiber paste 3, and welding the stainless steel tape into a stainless steel pipe 2 to obtain a fifth preformed cable core;

[0094] A steel pipe surface treatment assembly is used for cleaning, spraying a coupling agent, and drying the outer surface of the fifth preformed cable core to obtain an eighth preformed cable core;

[0095] A composite material coating assembly is used for coating glass fibers and carbon fibers on the outer periphery of the eighth preformed cable core, immersing the eighth preformed cable core in a resin matrix, and performing shaping, curing, and cooling to obtain a thirteenth preformed cable core;

[0096] A sleeving assembly is used for sleeving a protective sleeve 6 on the outer periphery of the eighth preformed cable core to obtain the composite armored optical cable.

[0097] In some embodiments, the steel pipe coating assembly comprises a stainless steel pipe disc 7, a straightening guide rail 8, a steel tape shaping die 9, a guide wheel 10, a fiber paste injector 11, a sizing die 12, a laser welding machine 13, and a steel pipe straightening machine 14 along the movement direction of the stainless steel tape.

[0098] In some embodiments, the steel pipe surface treatment assembly comprises a plasma cleaning machine 15, a coupling agent spraying machine 16, and an infrared drying machine 17.

[0099] The composite material coating assembly comprises a conveyor 18, a fiber yarn feeding rack 19, a resin dipping tank 20, a pultrusion die 21, a curing furnace 22, and a cooling water tank 23.

[0100] The preparation device of the composite armored optical cable provided by the application omits the traditional armored twisting equipment, relies on a laser welding + pultrusion integrated production line, and has low equipment investment; based on the high sealing property of the laser welded steel pipe, the fiber paste overflow loss rate is less than or equal to 3%, the continuous production speed is greater than or equal to 60 m / min, the process efficiency is improved by 300% compared with a segmented process, and the annual production capacity of a single line is more than 100,000 kilometers.

[0101] In the description of the application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0102] In addition, the terms "first", "second", etc. are used only to describe the purpose and should not be understood as indicating or implying relative importance or implying a number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0103] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or communicate with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0104] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0105] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A method of making a composite armored optical cable, characterized by, The composite armored optical cable comprises: a central optical fiber; a stainless steel tube sleeved on the outer periphery of the central optical fiber and filled with optical fiber jelly inside; an adhesion layer covering the outer periphery of the stainless steel tube; a fiber-reinforced composite material layer covering the outer periphery of the adhesion layer, the fiber-reinforced composite material layer being composed of glass fiber, carbon fiber and a resin matrix; a protective sleeve sleeved on the outer periphery of the fiber-reinforced composite material layer. The preparation method of the composite armored optical cable comprises the following steps: Step 1: wrapping the central optical fiber with a stainless steel strip, injecting optical fiber jelly, and welding the stainless steel strip into a stainless steel tube to obtain a fifth pre-cable core; Step 1 specifically comprises: S1: winding the stainless steel strip with a stainless steel tube disc; S2: straightening the stainless steel strip along the axial direction with a straightening guide rail to obtain a straight steel strip; S3: curling the straight steel strip into an arc-shaped accommodation groove along the radial direction with a steel strip shaping mold to obtain an arc-shaped steel strip; S4: guiding the central optical fiber into the accommodation groove of the arc-shaped steel strip with a guide wheel to obtain a first pre-cable core; S5: injecting optical fiber jelly into the first pre-cable core with an optical fiber jelly injector to obtain a second pre-cable core; S6: abutting the two sides of the steel strip in the second pre-cable core with a sizing die to curl it into a steel tube with the same outer diameter to obtain a third pre-cable core; S7: welding the abutting position of the steel strip in the third pre-cable core with a laser welding machine to obtain a fourth pre-cable core; at the same time of welding, the optical fiber jelly injector is dynamically injected through the tail end of the steel tube, the jelly injection pressure is linked with the welding speed for control, thereby improving the consistency and synchronization of the optical fiber jelly injection and the steel tube welding; S8: straightening the fourth pre-cable core along the axial direction with a steel tube straightening machine to obtain a fifth pre-cable core; Step 2: cleaning the outer surface of the fifth pre-cable core, spraying a coupling agent, and drying to obtain an eighth pre-cable core; Step 2 specifically comprises: (1) cleaning the surface of the fifth pre-cable core with a plasma cleaning machine to obtain a sixth pre-cable core; (2) uniformly spraying a coupling agent on the outer periphery of the sixth pre-cable core with a coupling agent spraying machine to obtain a seventh pre-cable core; (3) drying the surface of the seventh pre-cable core with an infrared drying machine to obtain an eighth pre-cable core; Step 3: wrapping glass fiber and carbon fiber on the outer periphery of the eighth pre-cable core, and then immersing it in a resin matrix, and then shaping, curing and cooling to obtain a thirteenth pre-cable core; Step 4: covering the outer periphery of the thirteenth pre-cable core with a protective sleeve to obtain the composite armored optical cable.

2. The method of making a composite cable as defined in claim 1, wherein, Step 3 comprises: Step 1: conveying the eighth pre-cable core to a fiber yarn placing rack with a conveyor, and winding carbon fiber and glass fiber on the outer periphery of the eighth pre-cable core with the fiber yarn placing rack to obtain a ninth pre-cable core; Step 2: immersing the ninth pre-cable core in a resin matrix with a resin dipping tank to obtain a tenth pre-cable core; Step 3: extruding the tenth pre-cable core into a circular shape with a pultrusion die to obtain an eleventh pre-cable core; Step 4: heating and curing the eleventh pre-cable core with a curing oven to obtain a twelfth pre-cable core; Step 5: cooling the twelfth pre-cable core with a cooling water tank to obtain a thirteenth pre-cable core.

3. The method of making a composite cable as defined in claim 1, wherein, The step four comprises: The thirteenth pre-cable core is coated with a protective sleeve to obtain the composite armored optical cable.

4. An apparatus for making a composite armored optical cable, characterized by The preparation method of the composite armored optical cable according to any one of claims 1-3, wherein the preparation device comprises: A steel tube coating assembly is used to coat the central optical fiber with a stainless steel belt, inject a fiber paste, and weld the stainless steel belt into a stainless steel tube to obtain a fifth pre-cable core; A steel tube surface treatment assembly is used to clean, spray a coupling agent, and dry the outer surface of the fifth pre-cable core to obtain an eighth pre-cable core; A composite material coating assembly is used to coat the outer periphery of the eighth pre-cable core with glass fibers and carbon fibers, immerse the eighth pre-cable core in a resin matrix, and perform molding, curing, and cooling to obtain a thirteenth pre-cable core; A sleeving assembly is used to sleeve the outer periphery of the eighth pre-cable core with a protective sleeve to obtain the composite armored optical cable.

5. The apparatus according to claim 4, wherein The steel tube coating assembly comprises: A stainless steel tube disc, a straightening guide rail, a steel belt shaping mold, a guide wheel, a fiber paste injector, a sizing die, a laser welding machine, and a steel tube straightening machine.

6. The apparatus according to claim 4, wherein The steel tube surface treatment assembly comprises: A plasma cleaning machine, a coupling agent spraying machine, and an infrared drying machine. The composite material coating assembly comprises: A conveyor, a fiber yarn feeding rack, a resin dipping tank, a pultrusion mold, a curing oven, and a cooling water tank.

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