An armored optical cable and a method of manufacturing the same

Abstract

The application discloses an armored optical cable and a preparation method thereof, and belongs to the technical field of optical cable preparation. The armored optical cable comprises a reinforcing core and a plurality of optical units. The plurality of optical units are twisted and wound on the outer periphery of the reinforcing core, and a penetrating gap is formed between two adjacent optical units. A plurality of armored steel wires are arranged between the optical units and the reinforcing core along the radial direction of the reinforcing core, and one end of each armored steel wire extends out of the penetrating gap between two adjacent optical units, and the other end of the armored steel wire extends out of another penetrating gap. In the application, the plurality of armored steel wires are arranged along the radial direction of the optical cable, and the armored steel wires are twisted by the twisting force of the optical units and the reinforcing core, so that the two ends of the armored steel wires extend outwards along the radial direction of the optical cable, and a sharp structure is formed on the outer periphery of the optical cable to hinder the gnawing of mice, thereby greatly improving the mouse-proof performance of the armored optical cable.

Description

Technical Field

[0001] This invention belongs to the field of optical cable manufacturing technology, specifically relating to an armored optical cable and its manufacturing method. Background Technology

[0002] With the continuous development of fiber optic communication technology, the use of optical cables is becoming increasingly widespread. Different usage environments have different requirements for the protection of optical cables. In areas with severe rodent infestations, optical cables are frequently chewed through by rodents, causing significant difficulties for line maintenance.

[0003] Current methods for rodent control in optical cables mainly employ two types: chemical and physical measures. Chemical measures primarily involve incorporating rodenticides, gustatory repellents, and olfactory repellents into the cable sheath. This achieves rodent control by adding agents that rodents dislike or that are lethal to them. However, these chemical agents gradually leach out over time, causing environmental pollution and impacting worker health during manufacturing. Physical measures mainly include increasing the cable's outer diameter, filling it with fiberglass, or adding metal armor. These measures increase the difficulty for rodents to gnaw on the cable, thus preventing damage to the internal optical units. However, both physical and chemical rodent control are essentially protective measures; they only become effective after rodents have grazed the cable. Once grazed, the damage is irreversible, reducing the cable's lifespan. Summary of the Invention

[0004] In view of one or more of the above-mentioned defects or improvement needs of the prior art, the present invention provides an armored optical cable to solve the problem that existing optical cables are easily damaged after being bitten.

[0005] To achieve the above objectives, the present invention provides an armored optical cable, comprising:

[0006] Reinforced core;

[0007] Multiple optical units are twisted and wound around the outer periphery of the reinforcing core, and a through gap is formed between two adjacent optical units.

[0008] Multiple armored steel wires are arranged radially between the optical unit and the reinforcing core, with one end of each armored steel wire extending from the through-gap between two adjacent optical units and the other end extending from another through-gap.

[0009] As a further improvement of the present invention, one end of the armored steel wire extends from one side of the optical unit, and the other end extends from the other side of the optical unit.

[0010] As a further improvement of the present invention, the optical unit includes multiple optical fibers, the outer periphery of which is covered with a sleeve, and the sleeve is filled with water-blocking grease.

[0011] As a further improvement of the present invention, the sleeve includes a metal armor layer.

[0012] As a further improvement of the present invention, a shaping ring is provided around the periphery of the plurality of optical units. The shaping ring is radially wrapped around the periphery of the plurality of optical units along the reinforcing core. There are a plurality of shaping rings, and the plurality of shaping rings are arranged at intervals along the axial direction of the reinforcing core.

[0013] As a further improvement of the present invention, the optical unit and the outer periphery of the reinforcing core are covered with an anti-slip layer.

[0014] As a further improvement of the present invention, the outer periphery of the plurality of optical units is also covered with a protective layer, and the armored steel wire extends radially into the protective layer without protruding from the outer periphery of the protective layer.

[0015] This application also includes a method for preparing an armored optical cable, which includes the following steps:

[0016] S1, separately pull the reinforcing core and optical unit;

[0017] S2. The armored steel wire is threaded radially through the optical unit so that the armored steel wire is located between the reinforcing core and the optical unit;

[0018] S3. Twist the reinforcing core and optical unit together to form a cable to obtain an armored optical cable.

[0019] As a further improvement to the present invention, it also includes S4: cutting the armored steel wire.

[0020] As a further improvement of the present invention, it also includes S5: covering the outer periphery of the armored steel wire with non-woven fabric.

[0021] As a further improvement of the present invention, the preparation steps of the optical unit in S1 are as follows: coating the outer periphery of the optical fiber with water-blocking grease, covering the outer periphery of the optical fiber with a metal armor layer, and extruding an anti-slip layer on the outer periphery of the metal armor layer.

[0022] As a further improvement of the present invention, in S2, the armored steel wire is transported and threaded through by a conveyor belt, and the transmission port of the conveyor belt is located in front of the twisting port of the reinforcing core and the optical unit.

[0023] S2 specifically includes: the conveyor belt transports the armored steel wire toward the gap between the reinforcing core and the optical unit, continuously twists and pulls the reinforcing core and the optical unit, the optical unit rotates and twists around the outer periphery of the reinforcing core, and the conveyor belt passes the armored steel wire between different optical units and the reinforcing core.

[0024] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0025] In summary, the beneficial effects of the above-described technical solutions conceived by this invention compared with the prior art include:

[0026] (1) The armored optical cable of the present invention uses armored steel wires inserted between the optical unit and the reinforcing core. The armored steel wires are tightly bound in the twisted structure formed by the reinforcing core and the optical unit by the twisting force of the reinforcing core and the optical unit. The two ends of the armored steel wires extend radially to form a sharp structure extending radially on the outer periphery of the optical cable. This sharp structure fundamentally prevents the possibility of rodent gnawing, avoids damage to the armored optical cable, and greatly improves the service life of the optical cable.

[0027] (2) The armored optical cable of the present invention forms an optical cable by covering the outer periphery of the sleeve of the optical unit with a metal armor layer and using the shaping ability of the metal itself after bending, thereby avoiding the problem of the armored optical cable unwinding and spreading; at the same time, the metal armor layer can effectively protect the optical fiber inside the optical unit, solving the problem of the optical cable's reduced protection capability due to the lack of an outer sheath.

[0028] (3) The armored optical cable of the present invention has an anti-slip layer wrapped around the outer periphery of the optical unit and the reinforcing core, which locks the armored steel wire when the optical unit and the reinforcing core are twisted together, preventing the armored steel wire from slipping out between the optical unit and the reinforcing core, thus ensuring the rodent-proof performance of the armored optical cable.

[0029] (4) The armored optical cable of the present invention uses a protective layer to wrap the outer periphery of the armored optical cable, thereby wrapping the sharp ends of the armored steel wires to prevent the armored optical cable from bending the armored steel wires during subsequent transportation and construction, which would cause the optical cable to lose its protective performance.

[0030] (5) The method for preparing the armored optical cable of the present invention involves radially transmitting armored steel wires to the reinforcing core before the reinforcing core and the optical unit are twisted together, passing the armored steel wires radially between the reinforcing core and the optical unit, and then twisting the reinforcing core and the optical unit together. The twisting torque of the reinforcing core and the optical unit is used to twist and twist the armored steel wires, so that the two ends of the armored steel wires are bent and extend along the radial direction of the optical cable, forming a sharp structure that protrudes outward. The overall preparation process is simple and does not significantly change the original processing technology of the optical cable, effectively ensuring the low-cost preparation of the armored optical cable. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the armored optical cable in an embodiment of the present invention.

[0032] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically:

[0033] 1. Reinforcing core; 2. Optical fiber; 3. Water-blocking grease; 4. Metal armor layer; 5. Anti-slip layer; 6. Armored steel wire; 7. Protective layer. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0035] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] Example:

[0040] Please see Figure 1 In a preferred embodiment of the present invention, the armored optical cable includes a reinforcing core 1 and multiple optical units. The multiple optical units are twisted and wound around the outer periphery of the reinforcing core 1, and a threading gap is formed between two adjacent optical units. Multiple armored steel wires 6 are threaded radially between the optical units and the reinforcing core 1, and one end of each armored steel wire 6 extends out from the threading gap between two adjacent optical units, and the other end extends out from another threading gap.

[0041] The armored optical cable of this application has multiple armored steel wires 6 threaded radially through the optical cable. The armored steel wires 6 are twisted by the twisting force of the optical unit and the reinforcing core 1 so that the two ends of the armored steel wires 6 extend radially toward the optical cable, thereby forming a sharp structure on the outer periphery of the optical cable to prevent rodents from gnawing and greatly improving the rodent-proof performance of the armored optical cable.

[0042] Furthermore, as an optional embodiment of the present invention, the insertion form of the armored steel wire 6 in this application is not fixed. The optical unit between the two ends of the armored steel wire 6 can be one, two, three, or more, that is, the two ends of the armored steel wire 6 can extend from different insertion gaps. Preferably, in this application, the insertion gap between adjacent optical units refers to the distance between the closest positions of the two optical units. When there is an armored steel wire 6, the insertion gap is filled by the armored steel wire 6, forming a structure in which the optical unit is close to the armored steel wire 6 and the armored steel wire 6 is close to another optical unit; when there is no armored steel wire 6 between adjacent optical units, the insertion gap between adjacent optical units is filled by the twisting of the optical unit and the reinforcing core 1, that is, when there is no armored steel wire 6 between adjacent optical units, their contact end faces are tangent.

[0043] Furthermore, as a preferred embodiment of the present invention, one end of the armored steel wire 6 extends from one side of the optical unit, and the other end extends from the other side of the optical unit. When multiple optical units are wrapped between the two ends of the armored steel wire 6, the two ends of the armored steel wire 6 are arranged in a roughly straight line. During the twisting process, the optical units will rotate to twist around the outer periphery of the armored steel wire 6. When the armored steel wire 6 rotates to a vertical state, it may fall directly from between the optical units, resulting in the inability to form a sharp structure. Therefore, in this application, the armored steel wire 6 is inserted from one side of a single optical unit and extends from the other end. The twisting and pressing force of two adjacent optical units is used to bend the armored steel wire 6, so that the armored steel wire 6 can be hung on the optical unit, preventing the armored steel wire 6 from falling out of the gap between the optical units during the twisting process.

[0044] Furthermore, as a preferred embodiment of the present invention, the optical unit in this application includes multiple optical fibers 2, with a sleeve disposed around the outer periphery of the optical fibers 2, and water-blocking grease 3 filled inside the sleeve. Since the armored optical cable in this application does not include an outer sheath, and no water-blocking yarn or similar material is wrapped around the outer periphery of the optical unit, the protection of the optical fibers 2 is achieved by the optical unit itself. Therefore, the sleeve is filled with water-blocking grease 3 to give the optical cable water-blocking properties. Simultaneously, since there is no protection around the outer periphery of the optical unit, this application requires corresponding reinforcement in the strength and thickness of the sleeve.

[0045] Preferably, the sleeve in this application includes a metal armor layer 4. The sleeve is mainly used to protect the internal optical fiber, so it can be made of metal tube or metal wrapped around the outer periphery of the optical fiber to form the metal armor layer 4, which plays a role in protecting the internal optical fiber 2. Furthermore, the metal armor layer 4 itself has the ability to maintain its shape after bending, so that the optical unit and the reinforcing core 1 can remain twisted after being twisted together, without the need for wrapping with water-blocking yarn or extruding and wrapping with an outer sheath as in conventional optical cables, thus avoiding the situation of the optical unit twisting back and unraveling after twisting. Preferably, since the optical unit and the reinforcing core 1 are not protected by an outer sheath, the outer surface of the metal armor layer 4 and the reinforcing core 1 is galvanized, which can greatly improve the corrosion resistance of the optical unit. Here, the reinforcing core 1 is preferably made of high-strength galvanized phosphated steel wire.

[0046] Preferably, since the sleeve in this application uses a metal armor layer 4, in order to simplify the manufacturing process, this application uses S-stranding or Z-stranding for molding. Meanwhile, the stranding pitch of the optical unit in this application is between 70mm and 100mm.

[0047] Preferably, the optical fiber 2 in this application is a high-strength, bend-insensitive single-mode optical fiber.

[0048] Optionally, in actual setup, when the user does not require a large number of optical fibers 2, the optical unit in this application can be replaced by a filler rope. When the sheath uses a metal armor layer 4, the filler rope is preferably made of low-modulus galvanized steel wire, and its outer periphery is covered with a layer of high-density polyethylene. On the one hand, this can enhance the tensile strength of the armored optical cable, and on the other hand, it has the ability to be shaped during the stranding of optical units.

[0049] Optionally, in this application, a shaping ring is fitted around the periphery of multiple stranded optical units. This shaping ring covers the periphery of the multiple optical units radially along the reinforcing core 1. There are multiple shaping rings, and they are spaced apart axially along the reinforcing core 1. When the sleeve is made of non-metallic material, the optical units are prone to untwisting after stranding. Therefore, shaping rings are needed around the periphery of the optical units to periodically bind them and prevent untwisting. It is worth noting that the winding position of the shaping rings needs to avoid contact with the armored steel wire 6. When the sleeve is made of non-metallic material, the filler rope is made of polypropylene and coated with a layer of high-density polyethylene.

[0050] Furthermore, the optical unit and reinforcing core 1 in this application are covered with an anti-slip layer 5, which is made of high-density polyethylene molded around the metal armor layer 4 and reinforcing core 1. The high-density polyethylene anti-slip layer 5 itself has certain protective properties, which can improve the protective capabilities of the optical unit and reinforcing core 1. In addition, since the armor steel wire 6 in this application is clamped by the twisted structure of the optical unit and reinforcing core 1, in order to prevent the armor steel wire 6 from sliding relative to the optical unit or reinforcing core 1, causing the sharp structure formed by the armor steel wire 6 to detach from the optical cable, this application adds an anti-slip layer 5 around the optical unit and reinforcing core 1, so that the armor steel wire 6 is tightly bound when the optical unit and reinforcing core 1 are twisted, thereby forming a stable sharp structure around the optical cable.

[0051] Furthermore, as a preferred embodiment of the present invention, the outer periphery of multiple optical units in this application is also covered with a protective layer 7. The armored steel wire 6 extends radially into the protective layer 7 and does not protrude from the outer periphery of the protective layer 7. Since the armored steel wire 6 in this application extends radially, the sharp structure of the armored steel wire 6 not only serves to prevent rodents, but it can also injure production and construction personnel, causing difficulties in the handling and construction of armored optical cables. Therefore, this application covers the outer periphery of the optical units with a protective layer 7. The protective layer 7 itself is made of porous foam material or non-woven fabric, so that when the protective layer 7 covers the outer periphery of the optical units, it will not bend the armored steel wire 6, thus affecting the protective capability of the armored optical cable. Furthermore, the protective layer 7 is preferably made of a biodegradable material, so that after the armored optical cable is laid, the biodegradable material degrades, and the sharp structure formed by the armored steel wire 6 protrudes to avoid being bitten by rodents.

[0052] Furthermore, regarding the armored optical cable in this application, this application also includes a method for manufacturing the armored optical cable, which includes the following steps:

[0053] S1, respectively pulls the reinforcing core 1 and the optical unit;

[0054] S2. The armored steel wire 6 is inserted radially along the optical unit so that the armored steel wire 6 is located between the reinforcing core 1 and the optical unit;

[0055] S3. Twist the reinforcing core 1 and the optical unit together to form a cable to obtain an armored optical cable.

[0056] The method for manufacturing the armored optical cable in this application mainly involves fixing the armored steel wire 6 between the stranded reinforcing core 1 and the optical unit, with both ends of the armored steel wire 6 extending out to form a sharp structure. Therefore, this application only requires inserting the armored steel wire 6 between the reinforcing core 1 and the optical unit before stranding the reinforcing core 1 with the optical unit, and then twisting the armored steel wire 6 by the stranding force of the reinforcing core 1 and the optical unit. Under the compression of the optical unit, the armored steel wire 6 extends radially towards the optical cable to form a sharp structure.

[0057] Specifically, the fabrication steps of the optical unit in step S1 of this application are as follows: Water-blocking grease 3 is coated around the outer periphery of the optical fiber 2; a metal armor layer 4 is wrapped around the outer periphery of the optical fiber 2; and an anti-slip layer 5 is extruded around the outer periphery of the metal armor layer 4. This application adds a metal armor layer 4 during the fabrication of the optical unit, utilizing the shaping ability of the metal itself to strand the optical cable. This not only locks the armor wires 6 between the optical units but also avoids the problem of unwinding and twisting after stranding in traditional optical cables. The anti-slip layer 5 is mainly used to cooperate with the anti-slip layer 5 around the outer periphery of the reinforcing core 1 to further lock the armor wires 6 and prevent them from detaching.

[0058] Further, as a preferred embodiment of the present invention, in S2 of this application, the armored steel wire 6 is transported and threaded through a conveyor belt, and the transmission port of the conveyor belt is located in front of the twisting port between the reinforcing core 1 and the optical unit. Specifically, S2 includes: the conveyor belt transporting the armored steel wire 6 towards the gap between the reinforcing core 1 and the optical unit, continuously twisting and pulling the reinforcing core 1 and the optical unit, the optical unit rotating and twisting around the outer circumference of the reinforcing core 1, and the conveyor belt threading the armored steel wire 6 between different optical units and the reinforcing core 1. This application mainly uses a conveyor belt to thread the armored steel wire 6 between the optical unit and the reinforcing core 1. More specifically, the armored steel wire 6 is cut into multiple pieces of uniform length, and the armored steel wire 6 is placed sequentially on the conveyor belt. To ensure stable transmission of the armored steel wire 6, a slot is provided on the conveyor belt to limit the transmission direction of the armored steel wire 6. The transmission port of the conveyor belt is positioned in front of the twisting port of the reinforcing core 1 and the optical unit. The armored steel wire 6 conveyed from the transmission port of the conveyor belt extends out toward the gap between the reinforcing core 1 and the optical unit. As the optical unit and the reinforcing core 1 are twisted together, the two ends of the armored steel wire 6 are pressed between the insertion gaps of the optical unit to form a sharp structure with both ends extending radially toward the optical cable.

[0059] It is worth noting that the transmission port of the conveyor belt and the twisting port of the twisting device are relatively close in this application, so that the armored steel wire 6 inserted between the optical unit and the reinforcing core 1 can be quickly fixed by the twisting torque of the optical unit and the reinforcing core 1, thus preventing the armored steel wire 6 from falling off between the optical unit and the reinforcing core 1.

[0060] Furthermore, the armored steel wire 6 in this application is continuously inserted between the optical unit and the reinforcing core 1 as the optical unit is twisted, so that the outer periphery of the optical cable forms a sharp structure arranged in a spiral.

[0061] Furthermore, since the optical unit in this application has a metal armor layer 4, the optical unit in this application is released through a wire feeder. Before the optical unit is stranded, 2 to 3 stranding panels are set on the transmission path of the optical unit. The stranding panels are provided with small holes for the optical unit to pass through. The stranding panels pre-deform the optical unit to release part of the bending stress of the optical unit. This makes the internal stress of the optical unit relatively reduced when the optical unit is stranded by the stranding mold, thus avoiding deformation of the optical unit.

[0062] Furthermore, this application also includes S4: trimming the armor steel wire 6. To facilitate the stable insertion of the armor steel wire 6 between the optical unit and the reinforcing core 1, the actual extended length of both ends of the armor steel wire 6 is relatively long. This makes the armor steel wire 6 prone to bending during storage, handling, or construction, causing the sharp structure of the armor steel wire 6 to curl and resulting in the optical cable losing its rodent-proof capability. Therefore, this application improves the anti-curling ability of the armor steel wire 6 by trimming its length.

[0063] Further preferably, this application also includes S5: covering the outer periphery of the armored steel wire 6 with non-woven fabric. The main function of the non-woven fabric is to wrap the sharp structures extending from the armored steel wire 6, preventing the sharp structures formed by the armored steel wire 6 from coming into contact with other hard objects and curling up, thus preventing injuries to the hands of production or construction personnel during handling. Preferably, the non-woven fabric in this application is a biodegradable material. After the armored optical cable is installed, the non-woven fabric can degrade rapidly, exposing the sharp ends of the armored steel wire 6 to form a protective layer around the optical unit, thus providing a rodent-proof effect.

[0064] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An armored optical cable, characterized in that, include: Reinforced core; Multiple optical units are twisted and wound around the outer periphery of the reinforcing core, and a through gap is formed between two adjacent optical units. Multiple armored steel wires are arranged radially between the optical unit and the reinforcing core, with one end of each armored steel wire extending from the through-hole between two adjacent optical units and the other end extending from another through-hole. The outer periphery of each of the optical units is also covered with a protective layer, which is made of porous foam material or non-woven fabric. The armored steel wire extends radially into the protective layer and does not protrude from the outer periphery of the protective layer.

2. The armored optical cable according to claim 1, characterized in that, One end of the armored steel wire extends from one side of the optical unit, and the other end extends from the other side of the optical unit.

3. The armored optical cable according to claim 1, characterized in that, The optical unit includes multiple optical fibers, and each optical fiber is fitted with a sleeve, which is filled with water-blocking grease.

4. The armored optical cable according to claim 3, characterized in that, The sleeve includes a metal armor layer.

5. The armored optical cable according to any one of claims 1 to 3, characterized in that, A shaping ring is fitted around the outer periphery of multiple optical units. The shaping ring is radially wrapped around the outer periphery of multiple optical units along the reinforcing core. There are multiple shaping rings, and the multiple shaping rings are arranged at intervals along the axial direction of the reinforcing core.

6. The armored optical cable according to any one of claims 1 to 4, characterized in that, The optical unit and the reinforcing core are covered with an anti-slip layer.

7. A method for preparing an armored optical cable, used to prepare an armored optical cable as described in any one of claims 1 to 6, characterized in that, Includes the following steps: S1, separately pull the reinforcing core and optical unit; S2. The armored steel wire is threaded radially through the optical unit so that the armored steel wire is located between the reinforcing core and the optical unit; S3. Twist the reinforcing core and optical unit together to form a cable to obtain an armored optical cable.

8. The method for preparing the armored optical cable according to claim 7, characterized in that, It also includes S4: cutting armor wire.

9. The method for preparing the armored optical cable according to claim 8, characterized in that, It also includes S5: non-woven fabric is wrapped around the outer periphery of the armored steel wire.

10. The method for preparing the armored optical cable according to claim 7, characterized in that, The fabrication steps of the optical unit in S1 are as follows: Water-blocking grease is coated around the outer periphery of the optical fiber, a metal armor layer is wrapped around the outer periphery of the optical fiber, and an anti-slip layer is extruded around the outer periphery of the metal armor layer.

11. The method for preparing the armored optical cable according to claim 7, characterized in that, In S2, the armored steel wire is transported and threaded through a conveyor belt, and the transmission port of the conveyor belt is located in front of the twisting port of the reinforcing core and the optical unit. S2 specifically includes: the conveyor belt transports the armored steel wire toward the gap between the reinforcing core and the optical unit, continuously twists and pulls the reinforcing core and the optical unit, the optical unit rotates and twists around the outer periphery of the reinforcing core, and the conveyor belt passes the armored steel wire between different optical units and the reinforcing core.

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