Novel high-strength overhead protective optical cable and preparation method thereof

Abstract

The invention discloses a novel high-strength overhead protection type optical cable and a preparation method thereof, and relates to the field of protection type optical cable, the novel high-strength overhead protection type optical cable comprises an outer sheath, the inner wall of the outer sheath is provided with aramid yarn, the inner wall of the aramid yarn is provided with an inner sheath, the inner cavity of the inner sheath is filled with a cable core filler, and the cable core filler is arranged in the inner cavity of the inner sheath. And a loose tube, a central reinforcing piece and a filling layer are respectively arranged in the inner cavity of the cable core filler. According to the novel high-strength overhead protection type optical cable and the preparation method thereof, the central reinforcing piece adopts high-modulus non-metal glass reinforced fibers and serves as one of important tension components in an optical cable structure, and high mechanical strength is provided for the optical cable; the loose tube is made of a high-rigidity and high-toughness polybutylene terephthalate material, so that higher tensile strength and excellent lateral pressure resistance are provided for the product; and the aramid yarn is adopted between the inner and outer protection layers, so that the overall tensile strength and impact strength of the optical cable are improved.

Description

Technical Field

[0001] The invention relates to the field of protective optical cables, and in particular to a novel high-strength overhead protective optical cable and a preparation method thereof. Background Art

[0002] With the promotion of globalization, the development of optical cable communication technology has become a key factor in global interconnection. Among them, overhead optical cables have been widely promoted and applied. Due to the particularity of their laying environment, overhead optical cables need to have a certain mechanical strength and outer protective layer to protect the optical cables from damage by bad weather, birds or other external forces, thereby ensuring the durability of the optical cables.

[0003] Traditional overhead optical cables generally have the optical fiber located in a loose tube filled with waterproof compounds. A non-metallic reinforcement core is arranged in the middle of the cable core. The loose tube is twisted around the central reinforcement core to form a compact and circular cable core structure. The gaps in the cable core must be filled with water-blocking compounds and a layer of polyethylene inner sheath is extruded, and then wrapped with aramid material and an electric tracking-resistant outer sheath or a polyethylene outer sheath is extruded.

[0004] At present, traditional overhead optical cables mainly use non-metallic reinforcement cores, multi-strand reinforced aramid material coating, and use electric tracking resistant or polyethylene outer sheaths. Overhead optical cables are also easily affected by external forces and the weakening of their own mechanical strength, making it difficult to achieve high strength and protection effects, especially when facing large-span applications. Therefore, the failure rate of traditional overhead optical cables is higher than that of direct buried and pipeline optical cables.

[0005] Therefore, it is necessary to propose a new type of high-strength overhead protective optical cable and a preparation method thereof to solve the above problems. Summary of the invention

[0006] The main purpose of the present invention is to provide a novel high-strength overhead protective optical cable and a preparation method thereof, which can effectively solve the problems in the background technology.

[0007] To achieve the above object, the technical solution adopted by the present invention is:

[0008] A novel high-strength overhead protective optical cable comprises an outer sheath, the inner wall of the outer sheath is installed with aramid yarn, the inner wall of the aramid yarn is installed with an inner sheath, the inner cavity of the inner sheath is filled with a cable core filler, and the inner cavity of the cable core filler is respectively installed with a loose tube, a central reinforcement member and a filling layer.

[0009] Preferably, there are four groups of loose tubes, one group of central reinforcement members, and two groups of filling layers.

[0010] Preferably, an armor layer is installed in the inner wall of the loose tube, the inner cavity of the armor layer is filled with fiber paste, and the inner cavity of the armor layer is installed with an optical fiber.

[0011] Preferably, the inner wall of the central reinforcement is installed with steel belt armor, the inner wall of the steel belt armor is installed with a cotton filling layer, the inner wall of the cotton filling layer is installed with a moisture-proof layer, the inner wall of the moisture-proof layer is installed with an antibacterial layer, the outer wall of the antibacterial layer is installed with a first spring layer and a second spring layer, one end of the first spring layer and the second spring layer is installed at the moisture-proof layer, the other end of the first spring layer and the second spring layer is installed at the rubber sheath, and a reinforcing wire is installed in the inner cavity of the rubber sheath.

[0012] Preferably, a buffer layer is installed in the inner wall of the filling layer, a shielding layer is installed in the inner wall of the buffer layer, a flame retardant layer and a synthetic rubber layer are installed in the inner wall of the shielding layer, a filling component is installed in the inner cavity of the flame retardant layer and the synthetic rubber layer, arc-shaped filling bars are symmetrically installed around the inner cavity of the filling component, filling brackets are installed on both sides of four adjacent arc-shaped filling bars, the inner cavity of the filling component is filled with a supporting filling structure and a honeycomb filling structure, the arc-shaped filling bars are used to improve the supporting stability of the filling component, the filling brackets are used to support the arc-shaped filling bars, the supporting filling structure is used to increase the current carrying capacity of the optical cable, and the honeycomb filling structure is used to reduce the overall weight and improve the line pressure and stability of the optical cable.

[0013] Preferably, the central reinforcement is a high modulus non-metallic glass reinforced fiber, the loose tube is a high rigidity polybutylene terephthalate material, the inner sheath is a polyurethane TPU inner sheath, the aramid yarn is an aramid webbing, and the outer sheath is a modified TPU flame retardant outer sheath.

[0014] Preferably, the inner cavity of the loose tube has 2-12 core optical fibers evenly arranged respectively, the optical fiber comprises a photonic crystal fiber, the outer wall of the photonic crystal fiber is provided with a microporous structure, the outer wall of the photonic crystal fiber is provided with fluoride glass, the outer wall of the fluoride glass is provided with aramid fiber, the outer wall of the aramid fiber is provided with a cladding structure, the microporous structure is used to change the optical properties of the optical fiber, including reducing the refractive index and increasing the dispersion, the fluoride glass has a lower refractive index and loss, and is used to achieve low-loss transmission in a wider wavelength range, the aramid fiber is used to improve the bending resistance and mechanical strength of the optical fiber, and the cladding structure is used to reduce the leakage and loss of the optical signal when the optical fiber is bent.

[0015] A novel method for preparing a high-strength aerial protection optical cable comprises the following steps:

[0016] S1: Coloring process: For long-distance, low-loss G654 optical fiber, a standard coloring mold is used for coloring to ensure the coloring effect. After the coloring is completed, a colored fiber is formed. Each reel of colored fiber undergoes appearance size, wiping test and attenuation test. After passing the test, it enters the next production process;

[0017] S2: Sheathing process: Long-distance, low-loss G654 optical fiber and fiber paste are arranged in the sleeve, and the fiber paste has a water-blocking function. The optical fiber includes photonic crystal fiber, fluoride glass, aramid fiber and cladding structure. The outer wall of the photonic crystal fiber is provided with a microporous structure, and the filling components, cable core fillers, loose sleeves, armor layers, central reinforcements, steel belt armor, cotton filling layers, moisture-proof layers, antibacterial layers, first spring layers, second spring layers, rubber sheaths, reinforcement wires, filling layers, buffer layers, shielding layers, flame-retardant layers and synthetic rubber layers are prepared for sheathing production. After the sheathing is completed, a sleeve is formed. Each coil of sleeve is tested for appearance size, excess length and attenuation. After passing the test, it enters the next process of production;

[0018] S3: Cabling process: The central reinforcement member uses a high modulus non-metallic glass reinforced fiber. The non-metallic glass reinforced fiber adopts filling paste and water-blocking yarn technology to achieve strong water-blocking effect. After the cabling is completed, the cable core is formed. Each cable core is tested for appearance size and attenuation. After passing the test, it enters the next production process;

[0019] S4: Inner sheath process: The inner sheath is formed by extruding polyurethane TPU material outside the cable core. After the inner sheath is produced, each drum of inner sheath is tested for appearance size and attenuation. After passing the test, it enters the next production process;

[0020] S5: Outer sheath process: clean the screw before production to ensure that there are no impurities, and use the semi-extrusion mold process to ensure that the optical cable has qualified water seepage. The inner sheath is wrapped with aramid yarn, and the aramid yarn matches the appropriate tension. The outer sheath is made of modified TPU flame retardant material to form a finished product. After the finished product is produced, each reel of optical cable is tested for appearance size and attenuation, and after passing the test, it enters the finished product packaging.

[0021] Compared with the prior art, the present invention provides a new type of high-strength overhead protective optical cable and a preparation method thereof, which has the following beneficial effects:

[0022] The new type of high-strength overhead protective optical cable and its preparation method, the central reinforcement member adopts high modulus non-metallic glass reinforced fiber, as one of the important tension components in the optical cable structure, which provides high mechanical strength for the optical cable; the loose tube adopts high rigidity and high toughness polybutylene terephthalate material, which provides the product with high tensile strength and excellent lateral pressure resistance; the inner and outer sheaths adopt aramid yarn, which improves the overall tensile and impact resistance of the optical cable. Its strength is 5-6 times that of steel wire, and its modulus is 2-3 times that of steel wire or glass fiber. It can effectively prevent external damage and high temperature resistance, and increase the durability of the optical cable; the inner sheath adopts polyurethane TPU material, which has ideal mechanical properties and can withstand high-intensity physical pressure and tensile force; the outer sheath adopts modified TPU flame retardant material, which is good for optical The cable has an effective flame retardant effect, and also has the characteristics of low temperature toughness, high strength, and wear resistance. The filling components set can effectively prevent the deformation of the internal structure of the optical cable when it is squeezed by external force, and can also provide a certain buffering effect for the optical cable, reducing the damage to the optical cable caused by vibration. The set optical fiber can achieve low-loss transmission in a wider wavelength range, which is especially suitable for optical communications in the mid-infrared band. It can also be used in high-power laser transmission and infrared remote sensing. It can change the optical properties of the optical fiber, such as reducing the refractive index and increasing the dispersion. The opened microporous structure allows the optical fiber to be used to manufacture highly sensitive sensors and broadband optical amplifiers, which can better confine the optical signal within the fiber core and maintain a low loss even at a smaller bending radius. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic structural diagram of the loose tube of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the central reinforcement member of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the filling layer of the present invention.

[0027] In the figure: 1. outer sheath; 2. aramid yarn; 3. inner sheath; 4. cable core filler; 5. loose tube; 6. armor layer; 7. fiber paste; 8. optical fiber; 9. central reinforcement; 10. steel belt armor; 11. cotton filling layer; 12. moisture-proof layer; 13. antibacterial layer; 14. first spring layer; 15. second spring layer; 16. rubber sheath; 17. reinforcing wire; 18. filling layer; 19. buffer layer; 20. shielding layer; 21. flame retardant layer; 22. synthetic rubber layer; 23. filling component; 24. cladding structure; 25. aramid fiber; 26. fluoride glass; 27. photonic crystal fiber; 28. microporous structure; 29. ​​arc filling strip; 30. filling bracket; 31. support filling structure; 32. honeycomb filling structure. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0029] Embodiment 1:

[0030] like Figure 1-Figure 4As shown, a novel high-strength overhead protective optical cable comprises an outer sheath 1, an aramid yarn 2 is installed on the inner wall of the outer sheath 1, an inner sheath 3 is installed on the inner wall of the aramid yarn 2, the inner cavity of the inner sheath 3 is filled with a cable core filler 4, a loose tube 5, a central reinforcement member 9 and a filling layer 18 are installed in the inner cavity of the cable core filler 4, four groups of loose tubes 5, one group of central reinforcement members 9, two groups of filling layers 18, an armor layer 6 is installed in the inner wall of the loose tube 5, the inner cavity of the armor layer 6 is filled with fiber paste 7, an optical fiber 8 is installed in the inner cavity of the armor layer 6, a steel belt armor 10 is installed on the inner wall of the central reinforcement member 9, a cotton filling layer 11 is installed on the inner wall of the steel belt armor 10, and a moisture-proof layer 1 is installed on the inner wall of the cotton filling layer 11. 2. The inner wall of the moisture-proof layer 12 is installed with an antibacterial layer 13, the outer wall of the antibacterial layer 13 is installed with a first spring layer 14 and a second spring layer 15, one end of the first spring layer 14 and the second spring layer 15 is installed at the moisture-proof layer 12, the other end of the first spring layer 14 and the second spring layer 15 is installed at the rubber sheath 16, a reinforcing wire 17 is installed in the inner cavity of the rubber sheath 16, a buffer layer 19 is installed in the inner wall of the filling layer 18, a shielding layer 20 is installed on the inner wall of the buffer layer 19, a flame-retardant layer 21 and a synthetic rubber layer 22 are installed on the inner wall of the shielding layer 20, a filling component 23 is installed in the inner cavity of the flame-retardant layer 21 and the synthetic rubber layer 22, and arc-shaped filling strips 29 are symmetrically installed around the inner cavity of the filling component 23, four Filling brackets 30 are installed on both adjacent sides of the arc filling strip 29, and the inner cavity of the filling component 23 is filled with a supporting filling structure 31 and a honeycomb filling structure 32. The arc filling strip 29 is used to improve the supporting stability of the filling component 23, and the filling bracket 30 is used to support the arc filling strip 29. The supporting filling structure 31 is used to increase the current carrying capacity of the optical cable. The honeycomb filling structure 32 is used to reduce the overall weight and improve the line pressure and stability of the optical cable. The central reinforcement member 9 is a high modulus non-metallic glass reinforced fiber, the loose tube 5 is a high-rigidity polybutylene terephthalate material, the inner sheath 3 is a polyurethane TPU inner sheath, the aramid yarn 2 is an aramid webbing, the outer sheath 1 is a modified TPU flame-retardant outer sheath, and the inner cavity of the loose tube 5 There are 2-12 core optical fibers 8 evenly arranged in the middle, and the optical fiber 8 includes a photonic crystal fiber 27. The outer wall of the photonic crystal fiber 27 is provided with a microporous structure 28. The outer wall of the photonic crystal fiber 27 is installed with a fluoride glass 26. The outer wall of the fluoride glass 26 is installed with an aramid fiber 25. The outer wall of the aramid fiber 25 is installed with a cladding structure 24. The microporous structure 28 is used to change the optical properties of the optical fiber 8, including reducing the refractive index and increasing the dispersion. The fluoride glass 26 has a lower refractive index and loss, and is used to achieve low-loss transmission in a wider wavelength range. The aramid fiber 25 is used to improve the bending resistance and mechanical strength of the optical fiber 8. The cladding structure 24 is used to reduce the leakage and loss of the optical signal when the optical fiber 8 is bent.

[0031] A novel method for preparing a high-strength aerial protection optical cable comprises the following steps:

[0032] S1: Coloring process: For long-distance, low-loss G654 optical fiber 8, a standard coloring mold is used for coloring to ensure the coloring effect. After the coloring is completed, a colored fiber is formed. Each reel of colored fiber undergoes appearance size, wiping test and attenuation test. After passing the test, it enters the next production process;

[0033] S2: Sheathing process: Long-distance, low-loss G654 optical fiber 8 and fiber paste 7 are arranged in the sleeve, and the fiber paste 7 has a water-blocking function, wherein the optical fiber 8 includes a photonic crystal fiber 27, a fluoride glass 26, an aramid fiber 25 and a cladding structure 24, and the outer wall of the photonic crystal fiber 27 is provided with a microporous structure 28, so as to prepare a filling component 23, a cable core filler 4, a loose sleeve 5, an armor layer 6, a central reinforcement 9, a steel belt armor 10, a cotton filling layer 11, a moisture-proof layer 12, an antibacterial layer 13, a first spring layer 14, a second spring layer 15, a rubber sheath 16, a reinforcing wire 17, a filling layer 18, a buffer layer 19, a shielding layer 20, a flame-retardant layer 21 and a synthetic rubber layer 22, so as to perform sheathing production, and a sleeve is formed after the sheathing is completed, and each sleeve is tested for appearance size, excess length and attenuation, and enters the next process of production after passing the test;

[0034] S3: Cabling process: The central reinforcement 9 uses a high modulus non-metallic glass reinforced fiber. The non-metallic glass reinforced fiber adopts a filling paste and water-blocking yarn process to achieve strong water-blocking effect. After the cabling is completed, a cable core is formed. Each cable core is tested for appearance size and attenuation. After passing the test, it enters the next production process;

[0035] S4: Inner sheath process: The inner sheath is formed by extruding polyurethane TPU material outside the cable core. After the inner sheath is produced, each drum of inner sheath is tested for appearance size and attenuation. After passing the test, it enters the next production process;

[0036] S5: Outer sheath process: clean the screw before production to ensure that there are no impurities, and use the semi-extrusion mold process to ensure that the optical cable has qualified water seepage. The inner sheath is wrapped with aramid yarn 2, and the aramid yarn 2 matches the appropriate tension. The outer sheath 1 uses modified TPU flame retardant material to form a finished product. After the finished product is produced, each reel of optical cable is tested for appearance size and attenuation, and after passing the test, it enters the finished product packaging.

[0037] The central reinforcement member 9 adopts high modulus non-metallic glass reinforced fiber, which is one of the important tension components in the optical cable structure and provides high mechanical strength for the optical cable; the loose tube 5 adopts high rigidity and high toughness polybutylene terephthalate material, which provides the product with high tensile strength and excellent lateral pressure resistance; the aramid yarn 2 is adopted between the inner and outer sheaths to improve the overall tensile and impact resistance of the optical cable. Its strength is 5-6 times that of steel wire, and its modulus is 2-3 times that of steel wire or glass fiber. It can effectively prevent external damage and high temperature resistance, and increase the durability of the optical cable; the inner sheath 3 adopts polyurethane TPU material, which has ideal mechanical properties and can withstand high-intensity physical pressure and tensile force; the outer sheath 1 adopts modified TPU flame-retardant material, which has an effective flame-retardant effect on the optical cable, and at the same time has the characteristics of low temperature toughness, high strength, and wear resistance.

[0038] Embodiment 2:

[0039] The invention provides a novel overhead optical cable, which is mainly used to meet the requirements of information transmission in large-span areas of overhead lines.

[0040] Further, in the type of the present invention, the optical cable includes an outer sheath 1, the outer sheath 1 includes an inner sheath 3 and a cable core arranged in the inner sheath 3, the cable core includes a loose tube 5, a central reinforcement member 9 and a plurality of optical fibers 8 arranged in the loose tube 5, each loose tube 5 is provided with at least two optical fibers 8; an aramid yarn 2 is arranged in the outer sheath 1, and the aramid yarn 2 is placed between the outer sheath 1 and the inner sheath 3; a fiber paste 7 is arranged in the loose tube 5 for filling,

[0041] Aramid yarn 2 is arranged between the outer sheath 1 and the inner sheath 3, which can effectively improve the strength, heat resistance, flame retardancy, chemical corrosion resistance, etc. of the optical cable; the outer sheath 1 is made of modified TPU flame retardant material, which improves the flame retardancy and mechanical properties of the optical cable; the inner sheath 3 is made of polyurethane TPU material, which improves the wear resistance of the optical cable.

[0042] The inner sheath 3 and the cable core are filled with optical cable filling paste or water-blocking yarn, which can effectively ensure that the optical cable is qualified for water seepage; the cable core is twisted by loose tube 5 around the central reinforcement 9, and 2-12 optical fibers 8 are arranged in the loose tube 5. The optical fiber 8 adopts long-distance, low-loss G654 optical fiber 8. The loose tube 5 is filled with fiber paste 7, which has a good water-blocking effect.

[0043] The central reinforcement member 9 is located at the center of the outer sheath 1. The central reinforcement member 9 is made of non-metallic glass reinforced fiber, which is light and hard, non-conductive, and has high mechanical strength. The loose tube 5 is made of high-rigidity polybutylene terephthalate material, which has excellent mechanical properties, heat resistance, chemical resistance and electrical properties.

[0044] The outer sheath 1 and the inner sheath 3 are made of modified TPU flame retardant material and polyurethane TPU material respectively. Aramid yarn 2 is arranged between the outer sheath 1 and the inner sheath 3. Optical cable filling paste or water-blocking yarn is used between the inner sheath 3 and the cable core. The cable core is twisted by loose tube 5 around the central reinforcement 9. 2-12 optical fibers 8 are arranged in the loose tube 5. The optical fiber 8 adopts long-distance, low-loss G654 optical fiber. Fiber paste is added in the loose tube 5 for water blocking. The loose tube 5 adopts high-rigidity polybutylene terephthalate material. The central reinforcement 9 adopts non-metallic glass reinforced fiber.

[0045] Key points of the aerial optical cable process provided by the embodiment of the present invention:

[0046] Coloring process: For long-distance, low-loss G654 optical fiber 8, a standard coloring mold is used for coloring to ensure the coloring effect. After coloring, a colored fiber is formed. Each reel of colored fiber undergoes appearance size, wiping test and attenuation test. After passing the test, it enters the next production process;

[0047] Sheathing process: Long-distance, low-loss G654 optical fiber 8 and optical fiber filler, i.e. fiber paste 7, are arranged in the sheath. The optical fiber filler has a certain water-blocking function. After the sheathing is completed, the sheath is formed. Each coil of sheath is tested for appearance size, excess length and attenuation. After passing the test, it enters the next production process;

[0048] Cabling process: The central reinforcement 9 uses a high modulus non-metallic glass reinforced fiber. The non-metallic glass reinforced fiber uses a filling paste or water-blocking yarn process to achieve strong water-blocking effect. After the cabling is completed, a cable core is formed. Each cable core is tested for appearance size and attenuation. After passing the test, it enters the next production process.

[0049] Inner sheath process: The inner sheath is formed by extruding polyurethane TPU material outside the cable core. After the inner sheath is produced, each coil of inner sheath is tested for appearance size and attenuation. After passing the test, it will enter the next production process.

[0050] External protection process: clean the screw before production to ensure that there are no impurities, and use the semi-extrusion mold process to ensure that the cable is water-permeable. The inner sheath is wrapped with aramid webbing, and the aramid webbing matches the appropriate tension. The outer sheath is made of modified TPU flame-retardant material to form a finished product. After the finished product is produced, each cable is tested for appearance, size and attenuation. After passing the test, it will be packaged as a finished product.

[0051] The high-strength overhead protective optical cable structure provided by the embodiment of the present invention inserts the single-mode or multi-mode optical fiber 8 and the water-blocking fiber paste 7 into a sleeve made of high-rigidity and high-strength PBT. The central reinforcement 9 of the cable core adopts high modulus non-metallic glass reinforced fiber, and the outside of the central reinforcement 9 adopts optical cable filling paste or water-blocking yarn technology. The loose sleeve 5 is twisted around the central reinforcement core to form a tight and circular cable core structure, and then a polyurethane TPU material inner sheath 3 is extruded for protection. The inner sheath 3 is wrapped with aramid webbing 2 for reinforcement, and finally a modified TPU flame-retardant material outer sheath 1 is extruded for secondary protection.

[0052] The performance of the optical cable structure prepared by the present invention is compared with that of the optical cable structure in the prior art, wherein the optical cable structure in the present invention is recorded as Example 1, and the optical cable structure in the prior art is recorded as Comparative Examples 1-2. The following is a comparison table:

[0053]

[0054] It can be seen that the performance of the optical cable structure prepared by the present invention has obvious advantages.

[0055] The filling component 23 provided can effectively prevent the deformation of the internal structure of the optical cable when it is squeezed by external force, and can also provide a certain buffering effect for the optical cable, reducing the damage to the optical cable caused by vibration. The optical fiber 8 provided can achieve low-loss transmission in a wider wavelength range, which is particularly suitable for optical communications in the mid-infrared band, and can also be used in the field of high-power laser transmission and infrared remote sensing. It can change the optical properties of the optical fiber 8, such as reducing the refractive index and increasing the dispersion. The microporous structure 28 provided can make the optical fiber 8 can be used to manufacture highly sensitive sensors and broadband optical amplifiers, which can better confine the optical signal within the fiber core and maintain a low loss even at a smaller bending radius.

[0056] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A novel high-strength aerial protection optical cable, comprising an outer sheath (1), characterized in that: The inner wall of the outer sheath (1) is installed with aramid yarn (2), the inner wall of the aramid yarn (2) is installed with an inner sheath (3), the inner cavity of the inner sheath (3) is filled with a cable core filler (4), and the inner cavity of the cable core filler (4) is respectively installed with a loose tube (5), a central reinforcement member (9) and a filling layer (18).

2. A novel high-strength overhead protection optical cable according to claim 1, characterized in that: There are four groups of loose tubes (5), one group of central reinforcement members (9), and two groups of filling layers (18).

3. A novel high-strength overhead protection optical cable according to claim 1, characterized in that: An armor layer (6) is installed in the inner wall of the loose tube (5), the inner cavity of the armor layer (6) is filled with fiber paste (7), and an optical fiber (8) is installed in the inner cavity of the armor layer (6).

4. A novel high-strength overhead protection optical cable according to claim 1, characterized in that: The inner wall of the central reinforcement member (9) is installed with a steel belt armor (10), the inner wall of the steel belt armor (10) is installed with a cotton filling layer (11), the inner wall of the cotton filling layer (11) is installed with a moisture-proof layer (12), the inner wall of the moisture-proof layer (12) is installed with an antibacterial layer (13), the outer wall of the antibacterial layer (13) is installed with a first spring layer (14) and a second spring layer (15), one end of the first spring layer (14) and the second spring layer (15) is installed at the moisture-proof layer (12), the other end of the first spring layer (14) and the second spring layer (15) is installed at the rubber sheath (16), and a reinforcing wire (17) is installed in the inner cavity of the rubber sheath (16).

5. The novel high-strength aerial protection optical cable according to claim 1 is characterized in that: A buffer layer (19) is installed in the inner wall of the filling layer (18), a shielding layer (20) is installed in the inner wall of the buffer layer (19), a flame retardant layer (21) and a synthetic rubber layer (22) are installed in the inner wall of the shielding layer (20), a filling component (23) is installed in the inner cavity of the flame retardant layer (21) and the synthetic rubber layer (22), arc-shaped filling strips (29) are symmetrically installed around the inner cavity of the filling component (23), and the four arc-shaped filling strips (29) are arranged on adjacent sides. A filling bracket (30) is installed, the inner cavity of the filling component (23) is filled with a supporting filling structure (31) and a honeycomb filling structure (32), the arc-shaped filling strip (29) is used to improve the supporting stability of the filling component (23), the filling bracket (30) is used to support the arc-shaped filling strip (29), the supporting filling structure (31) is used to improve the current carrying capacity of the optical cable, and the honeycomb filling structure (32) is used to reduce the overall weight and improve the line pressure and stability of the optical cable.

6. A novel high-strength overhead protection optical cable according to claim 1, characterized in that: The central reinforcement (9) is a high modulus non-metallic glass reinforced fiber, the loose tube (5) is a high rigidity polybutylene terephthalate material, the inner sheath (3) is a polyurethane TPU inner sheath, the aramid yarn (2) is an aramid webbing, and the outer sheath (1) is a modified TPU flame retardant outer sheath.

7. The novel high-strength aerial protection optical cable according to claim 1 is characterized in that: The inner cavity of the loose tube (5) is evenly provided with 2 to 12 core optical fibers (8), the optical fibers (8) comprising photonic crystal optical fibers (27), the outer wall of the photonic crystal optical fibers (27) being provided with a microporous structure (28), the outer wall of the photonic crystal optical fibers (27) being provided with fluoride glass (26), the outer wall of the fluoride glass (26) being provided with aramid fiber (25), the outer wall of the aramid fiber (25) being provided with a cladding structure (24), the microporous structure (28) being used to change the optical properties of the optical fibers (8), including reducing the refractive index and increasing the dispersion, the fluoride glass (26) having a lower refractive index and loss, and being used to realize low-loss transmission in a wider wavelength range, the aramid fiber (25) being used to improve the bending resistance and mechanical strength of the optical fibers (8), and the cladding structure (24) being used to reduce the leakage and loss of optical signals when the optical fibers (8) are bent.

8. The method for preparing a novel high-strength aerial protection optical cable according to claim 1, characterized in that: The steps include: S1: Coloring process: For long-distance, low-loss G654 optical fiber (8), a standard coloring mold is used for coloring to ensure the coloring effect. After the coloring is completed, a colored fiber is formed. Each reel of colored fiber is subjected to appearance size, wiping test and attenuation test. After passing the test, it enters the next production process; S2: Sheathing process: A long-distance, low-loss G654 optical fiber (8) and a fiber paste (7) are arranged in the sleeve, and the fiber paste (7) has a water-blocking function, wherein the optical fiber (8) includes a photonic crystal fiber (27), a fluoride glass (26), an aramid fiber (25) and a cladding structure (24), and the outer wall of the photonic crystal fiber (27) is provided with a microporous structure (28), thereby preparing a filling component (23), a cable core filler (4), a loose sleeve (5), an armor layer (6), a central reinforcement member (9), a steel The belt armor (10), the cotton filling layer (11), the moisture-proof layer (12), the antibacterial layer (13), the first spring layer (14), the second spring layer (15), the rubber sheath (16), the reinforcing wire (17), the filling layer (18), the buffer layer (19), the shielding layer (20), the flame retardant layer (21) and the synthetic rubber layer (22) are used for sheathing production. After the sheathing is completed, a sleeve is formed. Each sleeve is tested for appearance size, excess length and attenuation. After passing the test, it enters the next production process; S3: Cabling process: The central reinforcement (9) uses a high modulus non-metallic glass reinforced fiber. The non-metallic glass reinforced fiber adopts a filling paste and water-blocking yarn process to achieve strong water-blocking effect. After the cabling is completed, a cable core is formed. Each cable core is tested for appearance size and attenuation. After passing the test, it enters the next production process; S4: Inner sheath process: The inner sheath is formed by extruding polyurethane TPU material outside the cable core. After the inner sheath is produced, each drum of inner sheath is tested for appearance size and attenuation. After passing the test, it enters the next production process; S5: External sheath process: Before production, clean the screw to ensure that there are no impurities. The semi-extrusion mold process ensures that the optical cable has qualified water seepage. The inner sheath is wrapped with aramid yarn (2). The aramid yarn (2) matches the appropriate tension. The outer sheath (1) uses modified TPU flame retardant material to form a finished product. After the finished product is produced, each optical cable is tested for appearance size and attenuation. After passing the test, it enters the finished product packaging.

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