Non-metallic armored type all-dielectric overhead optical cable and preparation method thereof

Abstract

The application provides a non-metal armored full-dielectric overhead optical cable and a preparation method thereof, and comprises a no-lacing primary forming inner cable core, an inner sheath, a carbon fiber film layer, a biological bite-resistant non-metallic guard plate layer, an outer sheath and a red high-strength polyurethane layer which are sequentially arranged along the outer circumference of the no-lacing primary forming inner cable core, and a plurality of pressure sensing optical fibers are arranged between the biological bite-resistant non-metallic guard plate layer and the outer sheath. The application has the advantages of simple structure, convenient operation, and the like. The application can effectively avoid the technical problem of biological bite damage to the optical cable while meeting the overhead laying requirement, and there is no lacing mark on the sheath pipe, so that the risk of optical cable breakage is reduced, the self-weight of the optical cable is reduced, and the qualification rate and production efficiency of the optical cable are improved.

Description

Technical Field

[0001] This invention relates to the field of optical fiber communication technology, specifically to a non-metallic armored all-dielectric overhead optical cable and its manufacturing method. Background Technology

[0002] When using fiber optic cables outdoors, aerial cables are often used for ease of construction. However, because rodents and birds frequently inhabit these areas, incidents of biological damage to the cables are common. Most existing aerial fiber optic cables do not have the capability to resist biological damage. Once a cable is damaged or bitten through by organisms, communication will be interrupted, causing significant trouble for the operation and maintenance of communication lines.

[0003] To address the aforementioned issues, aerial optical cables have been used for preliminary protection against biological damage. However, this structure has the following drawbacks: 1) Because existing biological-resistant optical cables have effective leverage points when attacked by external organisms, repeated attacks can lead to cable breakage, causing communication interruptions and significant disruption to the operation and maintenance of communication lines; 2) Optical cables armored with metal components are heavy, making construction and maintenance difficult, unsuitable for aerial use, and their complex manufacturing process reduces production efficiency; 3) Existing aerial optical cables use a stranded structure, with the sheath secured by yarn binding. This yarn binding tension can cause compression and yarn marks on the sheath, resulting in substandard product quality; 4) During outdoor aerial optical cable installation, if heavy objects are suspended, it is difficult to quickly identify and remove them, which not only slows down construction but can also cause cable breakage, affecting communication transmission. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a non-metallic armored all-dielectric overhead optical cable and its preparation method. The cable has a simple structure and is easy to operate. While meeting the requirements for overhead laying, it effectively avoids the technical problem of biological damage to the optical cable, and there are no yarn marks on the sheath. This not only reduces the risk of cable breakage but also reduces the cable's weight, improving the cable's pass rate and production efficiency.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] This invention provides a non-metallic armored all-dielectric overhead optical cable, comprising: an unbundled, one-piece molded inner core, and an inner sheath, a carbon fiber film layer, a non-metallic anti-biological-gnawing protective plate layer, an outer sheath, and a red high-strength polyurethane layer arranged sequentially along the outer circumference of the unbundled, one-piece molded inner core. Multiple pressure-sensing optical fibers are provided between the non-metallic anti-biological-gnawing protective plate layer and the outer sheath.

[0007] This invention provides a non-metallic armored all-dielectric overhead optical cable and its preparation method. It has a simple structure and is easy to operate. While meeting the requirements for overhead laying, it can effectively avoid the technical problem of biological gnawing damaging the optical cable. Moreover, there are no yarn marks on the sheath tube, which not only reduces the risk of optical cable breakage, but also reduces the self-weight of the optical cable and improves the pass rate and production efficiency of the optical cable.

[0008] As a preferred technical solution, the anti-biological biting protective plate layer is a concave-convex reinforced non-metallic composite material component. The concave-convex reinforced composite material component includes: multiple reinforced non-metallic composite material components, the central region of which is concave towards the carbon fiber film layer, and the ends of each pair of adjacent reinforced non-metallic composite material components are convex towards the outer sheath and are tightly and seamlessly connected.

[0009] As a preferred technical solution, the pressure sensing optical fibers are equally spaced between the anti-biological-gnawing non-metallic protective plate layer and the outer sheath, and the pressure sensing optical fibers are arranged opposite to the central region of the reinforced non-metallic composite material.

[0010] As a preferred technical solution, the non-metallic armored all-dielectric overhead optical cable has an overall dry structure.

[0011] As a preferred technical solution, the one-piece molded inner cable core without yarn binding includes: a central carbon fiber reinforcing rod, and multiple stranded dry loose tubes are arranged along the outer circumference of the central carbon fiber reinforcing rod.

[0012] As a preferred technical solution, the stranded dry loose tube is provided with multiple optical fibers, and the gap between the stranded dry loose tube and the optical fibers is filled with water-blocking yarn.

[0013] As a preferred technical solution, an aramid yarn bearing layer is provided along the outside of the fully dry loose tube, and cable grease is filled in the gap between the aramid yarn bearing layer and the fully dry loose tube.

[0014] As a preferred technical solution, the outer sheath includes an armor layer and an outer sheath, wherein the armor layer and the outer sheath are twisted together in an S-shape to form a one-piece structure, and the inner sheath is a one-piece structure without yarn binding.

[0015] This invention also provides a method for preparing a non-metallic armored all-dielectric overhead optical cable, comprising the following steps:

[0016] S1 is made by sequentially armoring a fully dry loose tube and an aramid yarn bearing layer on the outside of the central carbon fiber reinforcing rod, and then preparing the inner layer cable core without yarn binding through a one-time molding technology.

[0017] S2 uses a one-time forming process for inner sheath to form an inner sheath without binding yarn, and immediately after the inner sheath is formed, the inner sheath is extruded to obtain the inner sheath.

[0018] The S4 is armored with a carbon fiber film layer, a non-metallic protective plate layer to prevent biological gnawing, and a pressure sensing optical fiber in sequence outside the inner sheath.

[0019] The S5 uses a twisted cage S-stranding process to create an outer sheath outside the pressure sensing fiber. The outer sheath is then extruded into an extruder head to obtain an outer sheath. After a red high-strength polyurethane layer is applied to the outer sheath, the optical cable is formed.

[0020] As a preferred technical solution, step S1 further includes the following steps: multiple optical fibers are installed inside the stranded dry loose tube, water-blocking yarn is filled in the gap between the stranded dry loose tube and the optical fibers, and cable grease is filled in the gap between the aramid yarn bearing layer and the stranded dry loose tube.

[0021] This invention provides a non-metallic armored all-dielectric overhead optical cable and its preparation method. It has a simple structure and is easy to operate. While meeting the requirements for overhead laying, it can effectively avoid the technical problem of biological gnawing damaging the optical cable. Moreover, there are no yarn marks on the sheath tube, which not only reduces the risk of optical cable breakage, but also reduces the self-weight of the optical cable and improves the pass rate and production efficiency of the optical cable. Attached Figure Description

[0022] Figure 1 The structural diagram of the non-metallic armored all-dielectric overhead optical cable provided by the present invention;

[0023] Among them, 1-inner sheath; 2-carbon fiber film layer; 3-anti-biological-gnawing non-metallic protective plate layer; 4-pressure sensing optical fiber; 5-outer sheath; 6-red high-strength polyurethane layer; 7-reinforced non-metallic composite component; 8-central carbon fiber reinforcing rod; 9-stranded dry loose tube; 10-optical fiber; 11-water-blocking yarn; 12-aramid yarn bearing layer; 13-cable grease. Detailed Implementation

[0024] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0025] It is understood that the present invention achieves its objectives through various embodiments, such as... Figure 1As shown, the present invention provides a non-metallic armored all-dielectric overhead optical cable, comprising: a one-piece molded inner core without braiding, the one-piece molded inner core comprising: a central carbon fiber reinforcing rod 8, stranded dry loose tubes 9, and an aramid yarn bearing layer 12, with multiple stranded dry loose tubes 9 arranged along the outer circumference of the central carbon fiber reinforcing rod 8; multiple optical fibers 10 are arranged inside the stranded dry loose tubes 9, and water-blocking yarn 11 is filled in the gap between the stranded dry loose tubes 9 and the optical fibers 10; along the outer circumference of the stranded dry loose tubes 9... An aramid yarn support layer 12 is provided, and cable grease 13 is filled in the gap between the aramid yarn support layer 12 and the stranded dry loose tube 9 to form a one-piece molded inner core without yarn binding. Along the outer circumference of the one-piece molded inner core without yarn binding, an inner sheath 1, a carbon fiber film layer 2, a non-metallic protective plate layer 3 resistant to biological gnawing, an outer sheath 5, and a red high-strength polyurethane layer 6 are sequentially arranged. Multiple pressure-sensing optical fibers 4 are provided between the non-metallic protective plate layer 3 resistant to biological gnawing and the outer sheath 5. The non-metallic protective plate layer 3 is a reinforced non-metallic material with an uneven surface. The composite material assembly, wherein the concave-convex reinforced composite material component comprises: multiple reinforced non-metallic composite material components 7, wherein the central region of each reinforced non-metallic composite material component 7 is recessed toward the carbon fiber film layer 2, and the ends of each pair of adjacent reinforced non-metallic composite material components 7 are protruding toward the outer sheath 5 and are tightly and seamlessly connected; pressure-sensing optical fibers 4 are equally spaced between the anti-biological-gnawing non-metallic protective plate layer 3 and the outer sheath 5, and the pressure-sensing optical fibers 4 are positioned opposite to the central region of the reinforced non-metallic composite material component 7. The non-metallic armored all-dielectric overhead optical cable has an overall dry structure. The outer sheath 5 includes an armor layer and an outer sheath, which are twisted together in a single-piece molding process. The inner sheath 1 is also a single-piece molding structure. The cable has a simple structure and is easy to operate. While meeting the requirements for overhead laying, it effectively avoids the technical problem of biological damage to the optical cable. Furthermore, there are no yarn marks on the sheath tube, which not only reduces the risk of optical cable breakage but also reduces the self-weight of the optical cable and improves the pass rate and production efficiency of the optical cable.

[0026] This invention also provides a method for preparing a non-metallic armored all-dielectric overhead optical cable, comprising the following steps:

[0027] S1 has a fully dry loose tube 9 and an aramid yarn support layer 12 armored on the outside of the central carbon fiber reinforcing rod 8. Multiple optical fibers 10 are installed inside the fully dry loose tube 9. Water-blocking yarn 11 is filled in the gap between the fully dry loose tube 9 and the optical fibers 10. Cable paste 13 is filled in the gap between the aramid yarn support layer 12 and the fully dry loose tube 9. The inner core of the cable is then prepared by the one-time forming technology without yarn binding.

[0028] S2 uses a one-time forming process for inner sheath to form an inner sheath without yarn binding and then strand the inner sheath outside the inner cable core. After the inner sheath is stranded, the inner sheath is immediately extruded to obtain the inner sheath 1.

[0029] S4 is fitted with a carbon fiber film layer 2, a non-metallic protective plate layer 3 to prevent biological gnawing, and a pressure sensing optical fiber 4 in sequence outside the inner sheath 1.

[0030] S5 uses a twisted cage S-stranding one-time molding process to prepare the outer sheath outside the pressure sensing optical fiber 4 through the armor layer and the outer sheath. The outer sheath then enters the extruder head for extrusion to obtain the outer sheath 5. After the outer sheath 5 is armored with a red high-strength polyurethane layer 6, the optical cable is formed.

[0031] This invention provides a method for preparing a non-metallic armored all-dielectric overhead optical cable. The process is simple, and the sheath tube adopts a non-binding process. While meeting the requirements for overhead laying, it can effectively avoid the technical problem of biological gnawing damaging the optical cable. Moreover, there are no binding marks on the sheath tube, which not only reduces the risk of optical cable breakage but also reduces the self-weight of the optical cable, thereby improving the pass rate and production efficiency of the optical cable.

[0032] In some embodiments, the cable core includes: a one-piece molded inner core without braiding, and an inner sheath 1, a carbon fiber film layer 2, a non-metallic protective plate layer 3 resistant to biological gnawing, an outer sheath 5, and a red high-strength polyurethane layer 6 are sequentially arranged along the outer circumference of the one-piece molded inner core without braiding. A plurality of pressure-sensing optical fibers 4 are provided between the non-metallic protective plate layer 3 resistant to biological gnawing and the outer sheath 5.

[0033] The above embodiment features a simple structure and convenient operation. The inner cable core, formed in one step without tying, is prepared using a one-step tying-free molding process. During construction, there is no need to clean the tying on the cable core surface; it can be used immediately after stripping, reducing construction difficulty and enabling rapid construction. This technology also solves the problem of tying marks on the sheath tube, improving product quality and yield. A red high-strength polyurethane layer 6 is provided outside the outer sheath 5. This red high-strength polyurethane layer 6 provides heat insulation and waterproofing, strengthening the protection of the internal optical fibers. The red color of the red high-strength polyurethane layer 6 is also attractive to birds, preventing them from pecking and damaging the optical cable structure. Furthermore, a carbon fiber film layer 2 is armored between the inner sheath 1 and the non-metallic protective layer 3, significantly enhancing the optical fiber's performance. The cable's mechanical properties and light weight reduce the overall weight of the optical cable and effectively protect it. Multiple pressure-sensing optical fibers 4 are installed between the non-metallic protective layer 3 (resistant to biological gnawing) and the outer sheath 5. These fibers use light as the carrier and optical fiber as the medium to detect the pressure on the outside of the optical cable. A preset pressure threshold is established. During outdoor overhead optical cable installation, if a suspended heavy object presses on the cable and the actual pressure exceeds the pressure threshold, the pressure-sensing optical fibers 4 detect this and trigger an alarm to alert staff to quickly remove the suspended heavy object. This prevents the optical cable from breaking and affecting communication transmission.

[0034] In some embodiments, the anti-biological biting protective layer 3 is a concave-convex reinforced non-metallic composite material component, the concave-convex reinforced composite material component comprising: multiple reinforced non-metallic composite material components 7, the central region of the reinforced non-metallic composite material component 7 being recessed toward the carbon fiber film layer 2, and the ends of every two adjacent reinforced non-metallic composite material components 7 being convex toward the outer sheath 5 and tightly and seamlessly connected.

[0035] The above-described embodiments are simple in structure and easy to operate. With the above structure, when external organisms bite the optical cable, they cannot form an effective biting force point, which can provide better protection for the inner optical fiber.

[0036] In some embodiments, the pressure-sensing optical fibers 4 are equally spaced between the anti-biological-gnawing non-metallic protective plate layer 3 and the outer sheath 5, and the pressure-sensing optical fibers 4 are arranged opposite to the central region of the reinforced non-metallic composite material part 7.

[0037] The above embodiment has a simple structure and is easy to operate. The pressure sensing fiber 4 uses light as a carrier and optical fiber as a medium to detect the pressure on the outside of the optical cable. A preset pressure threshold is set on the outside of the optical cable. During the process of outdoor overhead optical cable installation, if a suspended heavy object presses on the optical cable and the actual pressure on the outside of the optical cable exceeds the pressure threshold, the pressure sensing fiber 4 will detect that the actual pressure on the outside of the optical cable exceeds the pressure threshold and trigger an alarm unit to prompt the staff to quickly remove the suspended heavy object. This can prevent the optical cable from breaking and affecting communication transmission.

[0038] In some embodiments, the non-metallic armored all-dielectric overhead optical cable is an overall dry structure.

[0039] The above embodiments are simple in structure and easy to operate. The all-dry structure of the optical cable not only reduces the overall weight of the optical cable, but also avoids the emission of oily and aromatic odors, preventing the attraction of organisms for gnawing.

[0040] In some embodiments, the unbundled, one-piece molded inner cable core includes: a central carbon fiber reinforcing rod 8, and a plurality of stranded, dry, loose tubes 9 arranged along the outer circumference of the central carbon fiber reinforcing rod 8.

[0041] The above-described embodiment has a simple structure and is easy to operate. The central reinforcement of the optical cable uses a carbon fiber reinforcing rod, which greatly improves the tensile strength of the optical cable. At the same time, the use of carbon fiber material can reduce the overall weight of the optical cable.

[0042] In some embodiments, the stranded dry loose tube 9 is provided with multiple optical fiber lines 10, and the gap between the stranded dry loose tube 9 and the optical fiber lines 10 is filled with water-blocking yarn 11.

[0043] The above embodiments are simple in structure and easy to operate. The loose tube adopts a stranded dry structure, which can reduce the overall weight of the optical cable.

[0044] In some embodiments, an aramid yarn bearing layer 12 is provided along the outside of the fully dry loose tube 9, and cable grease 13 is filled in the gap between the aramid yarn bearing layer 12 and the fully dry loose tube 9.

[0045] The above embodiments are simple in structure, easy to operate, and can reduce the overall weight of the optical cable.

[0046] In some embodiments, the outer sheath 5 includes an armor layer and an outer sheath, wherein the armor layer and the outer sheath are twisted together in a spiral-shaped manner to form a one-piece structure, and the inner sheath 1 is a one-piece structure without yarn binding.

[0047] The above embodiments are simple in structure and easy to operate, effectively avoiding the technical problems of yarn printing in the sheath tube, and improving the pass rate and production efficiency of optical cables.

[0048] It is understood that this invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this invention. Furthermore, under the teachings of this invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this invention. Therefore, this invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are protected by this invention. Furthermore, under the teachings of this invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this invention. Therefore, this invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of this invention.

Claims

1. A non-metallic armored all-dielectric overhead optical cable, characterized in that, include: The inner cable core is formed in one piece without braiding. Along the outer circumference of the inner cable core without braiding, an inner sheath, a carbon fiber film layer, a non-metallic protective plate layer resistant to biological gnawing, an outer sheath, and a red high-strength polyurethane layer are sequentially arranged. Multiple pressure-sensing optical fibers are arranged between the non-metallic protective plate layer resistant to biological gnawing and the outer sheath. The anti-biological chewing protective layer is a concave-convex reinforced non-metallic composite material component. The concave-convex reinforced composite material component includes: multiple reinforced non-metallic composite material components, the central region of which is concave towards the carbon fiber film layer, and the ends of each pair of adjacent reinforced non-metallic composite material components are convex towards the outer sheath and are tightly and seamlessly connected. The pressure-sensing optical fibers are equally spaced between the anti-biological-gnawing non-metallic protective plate layer and the outer sheath, and the pressure-sensing optical fibers are arranged opposite to the central region of the reinforced non-metallic composite material.

2. The non-metallic armored all-dielectric overhead optical cable according to claim 1, characterized in that, The non-metallic armored all-dielectric overhead optical cable has an overall dry structure.

3. The non-metallic armored all-dielectric overhead optical cable according to claim 2, characterized in that, The one-piece molded inner cable core without yarn binding includes: a central carbon fiber reinforcing rod, and multiple stranded dry loose tubes arranged along the outer circumference of the central carbon fiber reinforcing rod.

4. The non-metallic armored all-dielectric overhead optical cable according to claim 3, characterized in that, The fully dry loose tube contains multiple optical fibers, and the gap between the fully dry loose tube and the optical fibers is filled with water-blocking yarn.

5. The non-metallic armored all-dielectric overhead optical cable according to claim 4, characterized in that, An aramid yarn support layer is provided along the outside of the fully dry loose tube, and cable grease is filled in the gap between the aramid yarn support layer and the fully dry loose tube.

6. The non-metallic armored all-dielectric overhead optical cable according to claim 5, characterized in that, The outer sheath includes an armor layer and an outer sheath, wherein the armor layer and the outer sheath are twisted together in an S-shape to form a one-piece structure, and the inner sheath is a one-piece structure without yarn binding.

7. A method for preparing a non-metallic armored all-dielectric overhead optical cable as described in claim 6, characterized in that, Includes the following steps: S1 is made by sequentially armoring a fully dry loose tube and an aramid yarn bearing layer on the outside of the central carbon fiber reinforcing rod, and then preparing the inner layer cable core without yarn binding through a one-time molding technology. S2 uses a one-time forming process for inner sheath to form an inner sheath without binding yarn, and immediately after the inner sheath is formed, the inner sheath is extruded to obtain the inner sheath. The S4 is armored with a carbon fiber film layer, a non-metallic protective plate layer to prevent biological gnawing, and a pressure sensing optical fiber in sequence outside the inner sheath. The S5 uses a twisted cage S-stranding process to create an outer sheath outside the pressure sensing fiber. The outer sheath is then extruded into an extruder head to obtain an outer sheath. After a red high-strength polyurethane layer is applied to the outer sheath, the optical cable is formed.

8. The method for preparing a non-metallic armored all-dielectric overhead optical cable according to claim 7, characterized in that, Step S1 further includes the following steps: multiple optical fibers are installed inside the stranded dry loose tube, water-blocking yarn is filled in the gap between the stranded dry loose tube and the optical fibers, and cable grease is filled in the gap between the aramid yarn support layer and the stranded dry loose tube.

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