Tensile and corrosion-resistant optical fiber steel wire and preparation method thereof

Abstract

The invention discloses a tensile and corrosion-resistant optical fiber steel wire and a preparation method thereof, and relates to the technical field of optical fibers, the outer side of an optical fiber body is wrapped with first insulating skins, the outer sides of the first insulating skins are wrapped with second insulating skins, the outer sides of the second insulating skins are symmetrically sleeved with two metal rings in a gluing mode, and the two metal rings are connected with the outer sides of the first insulating skins. A plurality of symmetrical semicircular metal rings are distributed on the outer side of the second insulation skin at equal intervals, the intervals of the metal rings distributed at equal intervals are filled with heat storage materials, the multiple steel wire bodies are symmetrically and completely embedded into grooves in the outer walls of the metal rings at equal intervals, and the first heat insulation cotton layer is pasted to the back faces of the metal rings in a glued mode. The waterproof layer is sleeved with the second heat insulation cotton layer. According to the invention, the steel wire body is completely embedded into the groove at the outer side of the metal ring, so that the force required for cutting the insulating sheath II by an external cutter can be increased, and the steel wire body does not deviate under the external pressure, thereby improving the safety of the optical fiber body.

Description

Technical Field

[0001] The invention relates to the technical field of optical fibers, and in particular to a tensile-resistant and corrosion-resistant optical fiber steel wire and a preparation method thereof. Background Art

[0002] In order to increase the tensile strength of optical fibers, it is often necessary to use steel wire and optical fibers together to prevent the optical fibers from breaking when pulled. Traditional steel wires are placed directly and parallelly on the outside of the optical fibers. When the steel wires are not completely wrapped around the outside of the optical fibers, they are often offset when subjected to external shear forces, making it impossible for the steel wires to provide good protection for the optical fibers. Steel wires are highly brittle in low-temperature environments and are easily broken under stress. In environments with large temperature differences between day and night, the possibility of optical fiber steel wires breaking will increase.

[0003] The defects of existing optical fibers are:

[0004] 1. The prior art JPS63199309A discloses a steel wire material for reinforcing optical fibers. The steel wire in the optical cable does not have a fixed structure. When the steel wire does not completely wrap the optical fiber, the steel wire is often deflected when subjected to external shear force, making it impossible for the steel wire to provide good protection for the optical fiber. Therefore, a tensile and corrosion-resistant optical fiber steel wire that can maintain the stability of the steel wire and is not prone to deflection is needed to solve this problem.

[0005] 2. Prior art KR100261677B1 discloses steel wires and steel wire ropes for reinforcing optical fibers. When the outer side of the cable is covered with steel wires, the steel wires tend to become cold and brittle at low temperatures and break easily when subjected to stress in an environment with a large temperature difference between day and night. Therefore, a tensile and corrosion-resistant optical fiber steel wire is needed to reduce the temperature variation of the steel wire when the temperature difference between day and night is large to solve this problem.

[0006] 3. Prior art KR1019900000320B1 discloses an optical fiber cable. When the optical fiber cable is wrapped with thermal insulation cotton on the outside, when the thermal insulation cotton is partially damaged, the outside temperature can easily enter the inside of the optical fiber through the damaged part of the thermal insulation cotton, and it can easily cause cold brittleness to the metal parts in the optical fiber at low temperatures. Therefore, a tensile and corrosion-resistant optical fiber steel wire is needed to solve this problem, which can solve the problem by not affecting the thermal insulation capacity of other parts when the thermal insulation layer of the optical fiber is partially damaged.

[0007] 4. Prior art CN110223802B discloses a high-strength and durable deep-water cable for ships. When the outer part of the cable is damaged, the internal filler is likely to continue to leak out from the damaged part, and the leakage cannot be limited to a local area without spreading to other parts. Therefore, a tensile and corrosion-resistant optical fiber steel wire is needed to solve this problem, which can prevent the fillers in all parts of the interior from leaking out from the damaged part when the cable is partially damaged. Summary of the invention

[0008] One purpose of the present application is to provide a tensile-resistant and corrosion-resistant optical fiber steel wire and a preparation method thereof, which can solve the technical problems raised in the prior art.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tensile-resistant and corrosion-resistant optical fiber steel wire, the optical fiber steel wire comprises, from the inside to the outside, an optical fiber body, an insulating skin 1, an insulating skin 2, a metal ring, a steel wire body, an insulating cotton layer 1, a waterproof layer, an insulating cotton layer 2 and an insulating skin 3, the insulating skin 1 is wrapped on the outside of the optical fiber body, the insulating skin 2 is wrapped on the outside of multiple insulating skins 1, the two metal rings are symmetrically sleeved on the outside of the insulating skin 2 by gluing, and multiple symmetrical two semicircular metal rings are evenly distributed on the outside of the insulating skin 2, and the interior of the evenly distributed metal ring intervals is filled with heat storage materials, the multiple steel wire bodies are symmetrically and evenly spaced and completely embedded in the outer wall groove of the metal ring, the insulating cotton layer 1 is glued to the back of the metal ring, the waterproof layer is sleeved on the outside of the steel wire body and the metal ring, the insulating cotton layer 2 is sleeved on the outside of the waterproof layer, and the insulating skin 3 is sleeved on the outside of the insulating cotton layer 2.

[0010] Preferably, the materials of the first insulation layer and the second insulation layer are both polyvinyl chloride or polyethylene.

[0011] Preferably, the insulating skin three is polyvinyl chloride.

[0012] Preferably, the heat storage material filled inside the equally spaced metal ring intervals is one of paraffin and stearic acid.

[0013] Preferably, the first and second heat-insulating cotton layers are both glass fiber heat-insulating cotton.

[0014] Preferably, the metal ring is made of stainless steel.

[0015] Preferably, the steel wire body is made of stainless steel.

[0016] Preferably, the waterproof layer is a polyethylene film or tin foil.

[0017] Preferably, the method for preparing the tensile-resistant and corrosion-resistant optical fiber steel wire comprises the following steps:

[0018] S1, using a wire extruder to coat the outer side of the optical fiber body with polyvinyl chloride to form an insulating layer 1, and then using a wire extruder to coat the outer side of the optical fiber body wrapped with multiple insulating layers 1 with polyvinyl chloride to form an insulating layer 2;

[0019] S2, symmetrically glue two semicircular metal rings to the outside of the second insulating skin by gluing, and then glue the heat insulation cotton to the back of the metal rings by gluing;

[0020] S3, then completely embedding the stainless steel wire into the outer groove of the metal ring, and gluing the stainless steel wire and the inner wall of the metal ring groove together with glue to form a steel wire body;

[0021] S4. Then, the second insulating skin of the glued steel wire body is put into the molten paraffin wax. After the paraffin wax is cooled, the polyvinyl chloride is coated on the outside of the second insulating skin of the glued steel wire body by using a wire extruder to form a waterproof layer.

[0022] Preferably, the step S4 further includes the following steps:

[0023] S41, then wrap the heat insulation cotton on the outside of the insulation skin 2 to form the heat insulation cotton layer 2, and then use the wire extruder again to wrap the polyvinyl chloride on the outside of the heat insulation cotton layer 2 to form the insulation skin 3.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention can increase the force required by an external cutter to cut the insulating skin by completely embedding the steel wire body into the groove outside the metal ring. The steel wire body will not deviate under external pressure, thereby improving the safety of the optical fiber body.

[0026] 2. The present invention can effectively reduce the invasion of external low temperature on the steel wire body by setting up paraffin and the second insulation cotton layer. The small amount of cold that passes through the second insulation cotton layer is neutralized by the temperature stored in the paraffin, reducing the invasion of the steel wire body and reducing the time the steel wire body is in a low temperature environment. At high temperatures, paraffin can store heat, thereby reducing the possibility of the steel wire body breaking when it is cold and brittle.

[0027] 3. The present invention can reduce the influence of local low temperature on the steel wire body inside other surrounding metal ring areas by providing the first heat-insulating cotton layer when the third insulation skin and the second heat-insulating cotton layer are partially broken, thereby reducing the influence of local damage on the thermal insulation performance of other parts of the product.

[0028] 4. The present invention can effectively reduce the possibility of paraffin leakage when melting by providing a metal ring. Even if the local insulating skin is damaged, it will not cause paraffin leakage in other parts of the product, thereby reducing the impact of local damage on the heat storage paraffin in other areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the present invention;

[0030] Figure 2 It is a schematic diagram of the metal ring structure of the present invention;

[0031] Figure 3 It is a flow chart of the preparation method of the present invention.

[0032] In the figure: 1. Optical fiber body; 2. Insulation skin 1; 3. Insulation skin 2; 4. Metal ring; 5. Steel wire body; 6. Insulation cotton layer 1; 7. Waterproof layer; 8. Insulation cotton layer 2; 9. Insulation skin 3. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] See also Figure 1 , Figure 2 and Figure 3A tensile and corrosion-resistant optical fiber steel wire, the optical fiber steel wire comprises an optical fiber body 1, an insulating skin 1 2, an insulating skin 2 3, a metal ring 4, a steel wire body 5, an insulating cotton layer 1 6, a waterproof layer 7, an insulating cotton layer 2 8 and an insulating skin 3 9 from the inside to the outside, the insulating skin 1 2 is wrapped on the outside of the optical fiber body 1, the insulating skin 2 3 is wrapped on the outside of multiple insulating skins 1 2, two metal rings 4 are symmetrically sleeved on the outside of the insulating skin 2 3 by gluing, and multiple symmetrical two semicircular metal rings 4 are evenly distributed on the outside of the insulating skin 2 3, and the interior of the evenly distributed metal rings 4 is filled with heat storage materials, multiple steel wire bodies 5 are symmetrically and evenly embedded in the outer wall groove of the metal ring 4, the insulating cotton layer 1 6 is glued to the back of the metal ring 4, the waterproof layer 7 is sleeved on the outside of the steel wire body 5 and the metal ring 4, the insulating cotton layer 2 8 is sleeved on the outside of the waterproof layer 7, and the insulating skin 3 9 is sleeved on the outside of the insulating cotton layer 2 8.

[0037] The materials of the insulation skin 1 2 and the insulation skin 2 3 are both polyvinyl chloride or polyethylene.

[0038] The insulation layer 9 is polyvinyl chloride.

[0039] The heat storage material filled inside the 4 equally spaced metal rings is one of paraffin and stearic acid.

[0040] The heat insulating cotton layer 1 6 and the heat insulating cotton layer 2 8 are both glass fiber heat insulating cotton.

[0041] The metal ring 4 is made of stainless steel.

[0042] The material of the steel wire body 5 is stainless steel.

[0043] The waterproof layer 7 is a polyethylene film or tin foil.

[0044] The preparation method of the tensile and corrosion-resistant optical fiber steel wire comprises the following steps:

[0045] S1, using a wire extruder to coat the outer side of the optical fiber body 1 with polyvinyl chloride to form an insulating skin 2, and then using a wire extruder to coat the outer side of the optical fiber body 1 wrapped with multiple insulating skins 2 to form an insulating skin 2 3;

[0046] S2, symmetrically glue two semicircular metal rings 4 to the outside of the insulating skin 3 by gluing, and then glue the heat insulation cotton to the back of the metal ring 4 by gluing;

[0047] S3, then completely embed the stainless steel wire into the outer groove of the metal ring 4, and glue the stainless steel wire and the inner wall of the groove of the metal ring 4 together to form a steel wire body 5;

[0048] S4. Then, the insulating skin 2 3 of the glued steel wire body 5 is put into the molten paraffin wax. After the paraffin wax is cooled, polyvinyl chloride is coated on the outside of the insulating skin 2 3 of the glued steel wire body 5 by using a wire extruder to form a waterproof layer 7.

[0049] S4 also includes the following steps:

[0050] S41, then wrap the heat insulating cotton on the outside of the insulation skin 3 to form the heat insulating cotton layer 8, and then use the wire extruder again to cover the polyvinyl chloride on the outside of the heat insulating cotton layer 8 to form the insulation skin 9.

[0051] Example 1: Lack of paraffin wax, lack of insulation layer 1, lack of metal ring, lack of insulation cotton 2

[0052] 1. Using a wire extruder to coat the outer side of the optical fiber body 1 with polyvinyl chloride to form an insulating layer 2, and then using a wire extruder to coat the outer side of the optical fiber body 1 with multiple insulating layers 2 to form an insulating layer 2 3;

[0053] 2. Two semicircular metal rings 4 are symmetrically glued to the outside of the insulating skin 2 3 by gluing, and then the heat insulation cotton is glued to the back of the metal ring 4;

[0054] 3. Then, the stainless steel wire is completely embedded into the outer groove of the metal ring 4, and the stainless steel wire and the inner wall of the groove of the metal ring 4 are glued together to form a steel wire body 5;

[0055] Fourth, the insulating skin 2 3 of the glued steel wire body 5 is then placed into the molten paraffin wax, and then after the paraffin wax is cooled, polyvinyl chloride is coated on the outside of the insulating skin 2 3 of the glued steel wire body 5 by using a wire extruder to form a waterproof layer 7.

[0056] 5. Then, the heat insulating cotton is wrapped on the outside of the insulating skin 2 3 to form the heat insulating cotton layer 2 8 , and then the wire extruder is used again to coat the polyvinyl chloride on the outside of the heat insulating cotton layer 2 8 to form the insulating skin 3 9 .

[0057] Embodiment 2:

[0058] 1. Using a wire extruder to coat the outer side of the optical fiber body 1 with polyvinyl chloride to form an insulating layer 2, and then using a wire extruder to coat the outer side of the optical fiber body 1 with multiple insulating layers 2 to form an insulating layer 2 3;

[0059] 2. Two semicircular metal rings 4 are symmetrically glued to the outside of the insulating skin 2 3 by gluing, and then the heat insulation cotton is glued to the back of the metal ring 4;

[0060] 3. Then, the stainless steel wire is completely embedded into the outer groove of the metal ring 4, and the stainless steel wire and the inner wall of the groove of the metal ring 4 are glued together to form a steel wire body 5;

[0061] Fourth, a wire extruder is then used to coat the outer side of the insulating skin 2 3 of the glued steel wire body 5 with polyvinyl chloride to form a waterproof layer 7.

[0062] 5. Then, the heat insulating cotton is wrapped on the outside of the insulating skin 2 3 to form the heat insulating cotton layer 2 8 , and then the wire extruder is used again to coat the polyvinyl chloride on the outside of the heat insulating cotton layer 2 8 to form the insulating skin 3 9 .

[0063] Embodiment three:

[0064] 1. Using a wire extruder to coat the outer side of the optical fiber body 1 with polyvinyl chloride to form an insulating layer 2, and then using a wire extruder to coat the outer side of the optical fiber body 1 with multiple insulating layers 2 to form an insulating layer 2 3;

[0065] 2. Glue two semicircular metal rings 4 symmetrically to the outside of the insulating skin 2 3 by gluing;

[0066] 3. Then, the stainless steel wire is completely embedded into the outer groove of the metal ring 4, and the stainless steel wire and the inner wall of the groove of the metal ring 4 are glued together to form a steel wire body 5;

[0067] Fourth, the insulating skin 2 3 of the glued steel wire body 5 is then placed into the molten paraffin wax, and then after the paraffin wax is cooled, polyvinyl chloride is coated on the outside of the insulating skin 2 3 of the glued steel wire body 5 by using a wire extruder to form a waterproof layer 7.

[0068] 5. Then, the heat insulating cotton is wrapped on the outside of the insulating skin 2 3 to form the heat insulating cotton layer 2 8 , and then the wire extruder is used again to coat the polyvinyl chloride on the outside of the heat insulating cotton layer 2 8 to form the insulating skin 3 9 .

[0069] Embodiment 4:

[0070] 1. Using a wire extruder to coat the outer side of the optical fiber body 1 with polyvinyl chloride to form an insulating layer 2, and then using a wire extruder to coat the outer side of the optical fiber body 1 with multiple insulating layers 2 to form an insulating layer 2 3;

[0071] 2. Then, the stainless steel wire is symmetrically arranged on the outside of the insulating skin 2 3 by gluing to form a steel wire body 5;

[0072] 3. Then, the insulating skin 2 3 of the glued steel wire body 5 is put into the molten paraffin wax, and then after the paraffin wax is cooled, polyvinyl chloride is coated on the outside of the insulating skin 2 3 of the glued steel wire body 5 by using a wire extruder to form a waterproof layer 7.

[0073] Fourth, the heat insulating cotton is then wrapped around the outer side of the insulating skin 2 3 to form a heat insulating cotton layer 2 8 , and then the wire extruder is used again to coat the polyvinyl chloride around the outer side of the heat insulating cotton layer 2 8 to form an insulating skin 3 9 .

[0074] Embodiment five:

[0075] 1. Using a wire extruder to coat the outer side of the optical fiber body 1 with polyvinyl chloride to form an insulating layer 2, and then using a wire extruder to coat the outer side of the optical fiber body 1 with multiple insulating layers 2 to form an insulating layer 2 3;

[0076] 2. Two semicircular metal rings 4 are symmetrically glued to the outside of the insulating skin 2 3 by gluing, and then the heat insulation cotton is glued to the back of the metal ring 4;

[0077] 3. Then, the stainless steel wire is completely embedded into the outer groove of the metal ring 4, and the stainless steel wire and the inner wall of the groove of the metal ring 4 are glued together to form a steel wire body 5;

[0078] Fourth, the insulating skin 2 3 of the glued steel wire body 5 is then placed into the molten paraffin wax, and then after the paraffin wax is cooled, polyvinyl chloride is coated on the outside of the insulating skin 2 3 of the glued steel wire body 5 by using a wire extruder to form a waterproof layer 7.

[0079] 5. Then, the wire extruder is used again to coat the polyvinyl chloride on the outside of the waterproof layer 7 to form an insulating skin 3 9.

[0080] Performance Test:

[0081] 1. Measuring temperature: destroy the heat insulation cotton layer 8 on the outside of one section inside the metal ring 4 of each embodiment, then wrap the end of the product of each embodiment with heat insulation cotton, then place the product in a freezer, the freezer temperature is set to -20°C, take out the product after one hour and measure the temperature of the steel wire body of another section inside the metal ring 4 adjacent to the section inside the metal ring 4 that has not been destroyed;

[0082] 2. Shearing resistance: The products of each embodiment are sheared using a shearing machine with a shearing pressure detection function, and the pressure required when the insulating skin of the product is sheared is measured.

[0083] Test data of each embodiment under the same test conditions

[0084] Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5 Temperature value (℃) -8 -13 -20 -20 -20 Shear pressure(N) 254 256 250 132 255

[0085] It can be known from the experimental data that by completely embedding the steel wire body into the groove outside the metal ring 4, the force required for the external cutter to cut the insulating skin 23 can be increased, thereby improving the safety of the optical fiber body 1. By setting the paraffin and thermal insulation cotton layer 28, the invasion of the external low temperature on the steel wire body 5 can be effectively reduced. The small amount of cold that passes through the thermal insulation cotton layer 28 is neutralized by the storage temperature of the paraffin, reducing the invasion of the steel wire body 5 and reducing the time the steel wire body 5 is in a low temperature environment, thereby reducing the possibility of the steel wire body 5 breaking when it is cold and brittle. By setting the thermal insulation cotton layer 16, the influence of the local low temperature on the steel wire body 5 inside other surrounding metal rings 4 can be reduced when the insulating skin 3 9 and the thermal insulation cotton layer 28 are partially broken.

[0086] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference signs in the claims should not be regarded as limiting the rights involved.

Claims

1. A tensile and corrosion-resistant optical fiber steel wire, Features: The optical fiber steel wire comprises, from the inside to the outside, an optical fiber body (1), an insulating skin 1 (2), an insulating skin 2 (3), a metal ring (4), a steel wire body (5), a heat insulating cotton layer 1 (6), a waterproof layer (7), a heat insulating cotton layer 2 (8) and an insulating skin 3 (9), wherein the insulating skin 1 (2) is wrapped around the outside of the optical fiber body (1), the insulating skin 2 (3) is wrapped around the outside of a plurality of insulating skins 1 (2), the two metal rings (4) are symmetrically sheathed around the outside of the insulating skin 2 (3) by gluing, and the outside of the insulating skin 2 (3) is evenly spaced. A plurality of symmetrical two semicircular metal rings (4) are distributed, and the heat storage material is filled inside the metal rings (4) that are evenly spaced. The plurality of steel wire bodies (5) are symmetrically and evenly spaced and completely embedded in the outer wall grooves of the metal rings (4). The first heat insulating cotton layer (6) is glued to the back of the metal ring (4). The waterproof layer (7) is sleeved on the outside of the steel wire body (5) and the metal ring (4). The second heat insulating cotton layer (8) is sleeved on the outside of the waterproof layer (7). The third insulating skin (9) is sleeved on the outside of the second heat insulating cotton layer (8).

2. The tensile and corrosion-resistant optical fiber steel wire according to claim 1, Features: The materials of the insulating skin 1 (2) and the insulating skin 2 (3) are both polyvinyl chloride or polyethylene.

3. The tensile and corrosion-resistant optical fiber steel wire according to claim 1, Features: The insulating skin three (9) is made of polyvinyl chloride.

4. The tensile and corrosion-resistant optical fiber steel wire according to claim 1, Features: The heat storage material filled inside the equally spaced metal rings (4) is one of paraffin and stearic acid.

5. The tensile and corrosion-resistant optical fiber steel wire according to claim 1, Features: The first heat insulating cotton layer (6) and the second heat insulating cotton layer (8) are both glass fiber heat insulating cotton.

6. The tensile and corrosion-resistant optical fiber steel wire according to claim 1, Features: The material of the metal ring (4) is stainless steel.

7. The tensile and corrosion-resistant optical fiber steel wire according to claim 1, Features: The material of the steel wire body (5) is stainless steel.

8. The tensile and corrosion-resistant optical fiber steel wire according to claim 1, Features: The waterproof layer (7) is a polyethylene film or tin foil.

9. The method for preparing a tensile and corrosion-resistant optical fiber steel wire according to claim 1, Features: The method for preparing the tensile-resistant and corrosion-resistant optical fiber steel wire comprises the following steps: S1, using a wire extruder to coat polyvinyl chloride on the outside of an optical fiber body (1) to form an insulating layer 1 (2), and then using a wire extruder to coat polyvinyl chloride on the outside of a plurality of optical fiber bodies (1) wrapped with the insulating layer 1 (2) to form an insulating layer 2 (3); S2, symmetrically gluing two semicircular metal rings (4) to the outer side of the second insulating skin (3) by gluing, and then gluing the heat insulation cotton to the back side of the metal rings (4); S3, then completely embedding the stainless steel wire into the outer groove of the metal ring (4), and gluing the stainless steel wire and the inner wall of the groove of the metal ring (4) together with glue to form a steel wire body (5); S4. Then, the insulating skin 2 (3) of the glued steel wire body (5) is placed into molten paraffin wax. After the paraffin wax is cooled, polyvinyl chloride is coated on the outside of the insulating skin 2 (3) of the glued steel wire body (5) using a wire extruder to form a waterproof layer (7).

10. The method for preparing the tensile and corrosion-resistant optical fiber steel wire according to claim 1, Features: The step S4 also includes the following steps: S41, then wrap the heat insulation cotton around the outside of the second insulation skin (3) to form the second heat insulation cotton layer (8), and then use the wire extruder again to wrap polyvinyl chloride around the outside of the second insulation cotton layer (8) to form the third insulation skin (9).

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