An optical cable with corrosion-resistant epidermis

Abstract

The present invention relates to the technical field of optical cables, specifically an optical cable with corrosion-resistant skin. An inner protective layer is installed on the side of the main metal wire. An inner second layer is sleeved on the side of the inner protective layer. An outer protective layer is sleeved on the side of the inner second layer. Auxiliary metal wires are installed inside the outer protective layer. An outer third layer is sleeved on the side of the outer protective layer. The material of the outer third layer is three-tenths polyimide, three-tenths polypropylene, and four-tenths polyphenylene sulfide. Polyimide has strong thermal stability and corrosion resistance. Polypropylene has strong stretching force and is suitable for harsh environments such as high temperature and high pressure. Polyphenylene sulfide has good flame retardancy and certain elasticity, and their mixture can obtain a very good corrosion-resistant composite material. The material of the inner second layer is semiconductor aluminum foil, which can effectively prevent water from seeping in and can also shield magnetic field interference.

Description

Technical Field

[0001] The present invention relates to the technical field of optical cables, and particularly to an optical cable with corrosion-resistant skin. Background Art

[0002] An optical cable is manufactured to meet the performance specifications of optics, mechanics or environment. It is a communication cable assembly that uses one or more optical fibers placed in a cladding sheath as a transmission medium and can be used alone or in groups.

[0003] In the prior art, optical cables are generally laid underground and are in a humid, acidic or alkaline environment for a long time, which greatly affects the function of the optical cable and shortens its service life. Therefore, the present invention provides an optical cable with corrosion-resistant skin. Summary of the Invention

[0004] The purpose of the present invention is to provide an optical cable with corrosion-resistant skin to solve the problems raised in the above background art.

[0005] The technical solution of the present invention is: an optical cable with corrosion-resistant skin, including a main metal wire. An inner protective layer is installed on the side of the main metal wire. An inner first layer is sleeved on the side of the inner protective layer. An inner second layer is sleeved on the side of the inner first layer. An outer protective layer is sleeved on the side of the inner second layer. An auxiliary metal wire is installed inside the outer protective layer. An outer third layer is sleeved on the side of the outer protective layer. The material of the outer third layer is three-tenths of polyimide, three-tenths of polypropylene, and four-tenths of polyphenylene sulfide. Polyimide has strong thermal stability and corrosion resistance. Polypropylene has strong stretching force and is suitable for harsh environments such as high temperature and high pressure. Polyphenylene sulfide has good flame retardancy and certain elasticity. Polyimide is coated on the inner and outer parts of the polypropylene and polyphenylene sulfide mixed tube. The polyimide coating has a certain hardness and can keep the optical cable straight without external interference. Their combination can obtain a very good corrosion-resistant composite material. The material of the inner second layer is semiconductor aluminum foil, which can effectively prevent water from seeping in and can also shield magnetic field interference. The materials of the outer first layer and the inner first layer are both modified polytetrafluoroethylene. Polytetrafluoroethylene itself has very high heat resistance and cold resistance, and is acid and alkali resistant, suitable for direct contact with the soil. Through experiments, it is shown that when 40% of barium sulfate is filled inside polytetrafluoroethylene, it has better wear resistance, which can reduce the damage caused by friction with rocks and trees when the optical cable is placed underground and prevent the internal structure from being exposed.

[0006] Preferably, the outer support strip and the outer second layer are both made of polypropylene. Polypropylene has excellent mechanical properties, including tensile strength, compressive strength, and hardness, outstanding rigidity, and resistance to flexural fatigue. The outer support strip is equidistantly provided with square grooves at the internal and external connection parts. When the optical cable turns, it can cooperate with the hollow position and the shape of the outer support strip to avoid generating strong bending forces that may cause the interior of the optical cable to burst. The material of the inner protective layer is POE-filled plastic, which has strong anti-aging properties and can prevent the inner protective layer from corroding and causing the main metal wires to come into contact and short-circuit. The material of the outer protective layer is polyester tape, which can effectively protect the auxiliary metal wires.

[0007] The present invention provides an optical cable with corrosion-resistant skin through improvement. Compared with the prior art, it has the following improvements and advantages:

[0008] First: For the optical cable with corrosion-resistant skin of the present invention, the outer three layers are made of three-tenths polyimide, three-tenths polypropylene, and four-tenths polyphenylene sulfide. Polyimide has strong thermal stability and corrosion resistance. Polypropylene has strong stretching force and is suitable for harsh environments such as high temperature and high pressure. Polyphenylene sulfide has good flame retardancy and certain elasticity. The polyimide is coated on the inner and outer parts of the polypropylene and polyphenylene sulfide mixed tube. The polyimide coating has a certain hardness and can keep the optical cable straight without external interference. Their combination can obtain a very good corrosion-resistant composite material. The semiconductor aluminum foil can effectively prevent water from seeping in and can also shield magnetic field interference. Polytetrafluoroethylene itself has very high heat resistance and cold resistance, and is acid and alkali resistant, suitable for direct contact with the soil. Experiments show that when 40% barium sulfate is filled inside polytetrafluoroethylene, it has better wear resistance, which can reduce the damage caused by friction with rocks and trees when the optical cable is placed underground and prevent the internal structure from being exposed;

[0009] Second: For the optical cable with corrosion-resistant skin of the present invention, the outer support strip and the outer second layer are both made of polypropylene. Polypropylene has excellent mechanical properties, including tensile strength, compressive strength, and hardness, outstanding rigidity, and resistance to flexural fatigue. When the optical cable turns, it can cooperate with the hollow position and the shape of the outer support strip to avoid generating strong bending forces that may cause the interior of the optical cable to burst. The material of the inner protective layer is POE-filled plastic, which has strong anti-aging properties and can prevent the inner protective layer from corroding and causing the main metal wires to come into contact and short-circuit. The material of the outer protective layer is polyester tape, which can effectively protect the auxiliary metal wires;

[0010] Summary: For the optical cable with corrosion-resistant skin of the present invention, the multi-layer setting of the outer skin and the combination of various materials can have very high corrosion resistance, enabling the optical cable to work well in various environments. Description of the Drawings

[0011] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments:

[0012] Figure 1 is a schematic three-dimensional structure diagram of the present invention;

[0013] Figure 2 is the front view of the three-dimensional structure of the present invention;

[0014] Figure 3 is a schematic diagram of the external support bar structure of the present invention;

[0015] Figure 4 is a schematic diagram of the external three-layer material structure of the present invention;

[0016] Figure 5 is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0017] Figure 6 is a schematic diagram of the structure of Embodiment 3 of the present invention.

[0018] Explanation of reference numerals:

[0019] 1. Main metal wire; 2. Inner protective layer; 3. Inner first layer; 4. Inner second layer; 5. Outer protective layer; 6. Auxiliary metal wire; 7. Outer three layers; 8. Outer support bar; 9. Outer second layer; 10. Outer first layer; 11. Micro telescopic column. Specific embodiments

[0020] The present invention will be described in detail below. The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] The present invention provides an optical cable with corrosion-resistant skin through improvement. The technical solution of the present invention is:

[0022] Embodiment 1:

[0023] As Figures 1 - 3As shown in the figure, an optical cable with corrosion-resistant skin includes a main metal wire 1. An inner protective layer 2 is installed on the side of the main metal wire 1. An inner first layer 3 is sleeved on the side of the inner protective layer 2. An inner second layer 4 is sleeved on the side of the inner first layer 3. An outer protective layer 5 is sleeved on the side of the inner second layer 4. An auxiliary metal wire 6 is installed inside the outer protective layer 5. An outer third layer 7 is sleeved on the side of the outer protective layer 5. The material of the outer third layer 7 is three-tenths polyimide, three-tenths polypropylene, and four-tenths polyphenylene sulfide. After proportioning them, a polypropylene and polyphenylene sulfide mixed tube is obtained through an extruder. The polyimide liquid is sprayed on the inner and outer parts of the mixed tube and solidified. Polyimide has strong thermal stability and corrosion resistance. Polypropylene has strong stretching force and is suitable for harsh environments such as high temperature and high pressure. Polyphenylene sulfide has good flame retardancy and certain elasticity. Polyimide is coated on the inner and outer parts of the polypropylene and polyphenylene sulfide mixed tube. The polyimide coating has a certain hardness and can keep the optical cable straight without external interference. Only the polyimide coating has minor damage during turning, and the polypropylene and polyphenylene sulfide mixed tube will not be damaged due to its elasticity. Their combination can obtain a very good corrosion-resistant composite material. When the outer first layer 10 is damaged, the outer third layer 7 can effectively prevent corrosion from spreading to the inside. The material of the inner second layer 4 is semiconductor aluminum foil, which can effectively prevent water from seeping in and can also shield magnetic field interference. The materials of the outer first layer 10 and the inner first layer 3 are both modified polytetrafluoroethylene. Polytetrafluoroethylene itself has high heat resistance and cold resistance, and is acid and alkali resistant, suitable for direct contact with the soil. Through experiments, it is shown that 40% barium sulfate is filled in polytetrafluoroethylene to make it have better wear resistance. When the optical cable is placed underground, it can reduce the damage caused by friction with rocks and trees and avoid the exposure of the internal structure.

[0024] Furthermore, the materials of the outer support strip 8 and the outer second layer 9 are both polypropylene. Polypropylene has excellent mechanical properties, including tensile strength, compressive strength, and hardness, outstanding rigidity, and resistance to flexural fatigue. The outer support strip 8 is equidistantly provided with square grooves at the internal and external connection parts. When the optical cable turns, it can avoid generating strong bending force in cooperation with the hollow position and the shape of the outer support strip 8, preventing the optical cable from bursting inside. The material of the inner protective layer 2 is POE-filled plastic, which has strong anti-aging property and can prevent the main metal wire 1 from contacting and short-circuiting due to the corrosion of the inner protective layer 2. The material of the outer protective layer 5 is polyester tape, which can effectively protect the auxiliary metal wire 6.

[0025] Working principle: The materials used for the outer three layers 7 are three-tenths polyimide, three-tenths polypropylene, and four-tenths polyphenylene sulfide. After proportioning them, a polypropylene and polyphenylene sulfide mixed tube is obtained through an extruder. The polyimide liquid is sprayed on the inner and outer parts of the mixed tube and solidified. Polyimide has strong thermal stability and corrosion resistance. Polypropylene has strong stretching force and is suitable for harsh environments such as high temperature and high pressure. Polyphenylene sulfide has good flame retardancy and certain elasticity. The polyimide coating has a certain hardness and can keep the optical cable straight without external interference. Only the polyimide coating has minor damage during turning, and the polypropylene and polyphenylene sulfide mixed tube will not be damaged due to its elasticity. When the outermost layer 10 is damaged, the outer three layers 7 can effectively prevent the corrosion from spreading to the inside. The material of the inner second layer 4 is semiconductor aluminum foil, which can effectively prevent water from seeping in and can also shield magnetic field interference. The materials of the outermost layer 10 and the innermost layer 3 are both modified polytetrafluoroethylene. Polytetrafluoroethylene has high heat resistance and cold resistance, and is acid and alkali resistant, suitable for direct contact with the soil. The materials of the outer support strip 8 and the outer second layer 9 are both polypropylene. Polypropylene has excellent mechanical properties, including tensile strength, compressive strength, and hardness, outstanding rigidity and flexural fatigue resistance. When the optical cable turns, it can avoid generating strong bending force and bursting the inside of the optical cable in cooperation with the hollow position and the shape of the outer support strip 8. The material of the inner protective layer 2 is POE-filled plastic, which has strong anti-aging property and can prevent the main metal wire 1 from contacting and short-circuiting due to the corrosion of the inner protective layer 2. The material of the outer protective layer 5 is polyester tape, which can effectively protect the auxiliary metal wire 6.

[0026] Example Two:

[0027] As Figure 5 shown, the settings of the outer support strip 8 and the outer second layer 9 are cancelled, and the hollow structure is used to avoid the optical cable being difficult to bend due to being too thick outside during turning.

[0028] Example Three:

[0029] As Figure 6 shown, the micro telescopic column 11 is used instead of the outer support strip 8 and the outer second layer 9. A spring is provided inside the micro telescopic column 11. When used in areas such as roads or factories, it can avoid the internal structure of the optical cable from becoming loose or being squeezed due to ground vibration underground, causing the main metal wires 1 to approach each other and resulting in a short circuit.

[0030] The foregoing description enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An optical cable with corrosion-resistant skin, comprising a main metal wire (1), Characterized in that: An inner protective layer (2) is installed on the side of the main metal wire (1), an inner first layer (3) is sleeved on the side of the inner protective layer (2), an inner second layer (4) is sleeved on the side of the inner first layer (3), an outer protective layer (5) is sleeved on the side of the inner second layer (4), an auxiliary metal wire (6) is installed inside the outer protective layer (5), and an outer third layer (7) is sleeved on the side of the outer protective layer (5); Outer support bars (8) are fixedly connected to the side of the outer third layer (7) at equal intervals. The top of the outer support bars (8) is fixedly connected to an outer first layer (10), and the side of the outer support bars (8) is fixedly connected to an outer second layer (9). Square grooves are provided at equal intervals at the internal and external connection parts of the outer support bars (8); The material of the outer third layer (7) is three-tenths polyimide, three-tenths polypropylene, and four-tenths polyphenylene sulfide, and the polyimide is coated on the inner and outer parts of the polypropylene and polyphenylene sulfide mixed tube; The material of the inner second layer (4) is semiconductor aluminum foil; The materials of the outer first layer (10) and the inner first layer (3) are both polytetrafluoroethylene modified by filling 40% barium sulfate inside the polytetrafluoroethylene; The material of the inner protective layer (2) is POE-filled plastic; 2. An optical cable with corrosion-resistant skin according to claim 1, Characterized in that: The materials of the outer support bars (8) and the outer second layer (9) are both polypropylene; 3. An optical cable with corrosion-resistant skin according to claim 1, Characterized in that: The material of the outer protective layer (5) is polyester tape.

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