A skeleton optical cable

Abstract

The utility model belongs to cable manufacturing technical field discloses a kind of framework optical cable, including framework, multiple optical fiber ribbons, first wrapping layer, inner protective layer, protective layer, armoring layer and outer protective layer, framework includes framework groove, optical fiber ribbon is placed in framework groove, first wrapping layer is coated in the outer periphery of framework, inner protective layer is coated in the outer periphery of first wrapping layer, protective layer is coated in the outer periphery of inner protective layer, protective layer is formed by multiple fan annular glass steel sheet surrounding in the outer periphery of inner protective layer, armoring layer is coated in the outer periphery of protective layer, outer protective layer is coated in the outer periphery of armoring layer.The framework optical cable of the utility model can solve the problems of poor rat-proof performance and poor extrusion resistance of existing optical cable, the optical cable laid in pipeline is easy to be bitten by rat, the optical cable buried underground is easy to be impacted by gravel, leading to the damage of optical fiber ribbon after a period of use, and poor communication quality.

Description

Technical Field

[0001] This utility model relates to the field of optical cable manufacturing technology, and in particular to a skeleton optical cable. Background Technology

[0002] With the development of communication technology, people have increasingly higher requirements for communication quality, which in turn places higher demands on optical fiber cables used for fiber optic communication. Based on different laying methods, optical cables are classified into duct optical cables, direct-buried optical cables, overhead optical cables, and underwater optical cables. To avoid encroaching on above-ground space and minimizing the impact on the urban landscape, most existing urban optical cable laying methods utilize duct optical cables, direct-buried cables, and underwater cables.

[0003] However, existing optical cables have poor rodent-proof and compression-resistant properties, making optical cables laid in ducts easily torn by rats, and optical cables buried underground easily deformed by impacts from gravel. This results in fiber optic cable damage and deterioration of communication quality after a period of use.

[0004] Therefore, there is an urgent need for a backbone optical cable to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to provide a skeleton optical cable that can solve the problems of poor rodent resistance and poor compression resistance of existing optical cables. Optical cables laid in ducts are easily torn by rats, and optical cables buried underground are easily deformed by the impact of gravel, resulting in damage to the optical fiber ribbon and deterioration of communication quality after a period of use.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A skeleton optical cable, comprising:

[0008] A skeleton and multiple fiber ribbons, wherein the skeleton includes a skeleton groove and the multiple fiber ribbons are placed in the skeleton groove;

[0009] The first wrapping layer covers the outer periphery of the skeleton;

[0010] An inner protective layer, which covers the outer periphery of the first wrapping layer;

[0011] A protective layer, which covers the outer periphery of the inner protective layer, is formed by multiple fan-shaped fiberglass sheets surrounding the outer periphery of the inner protective layer;

[0012] An armor layer, which covers the outer periphery of the protective layer;

[0013] An outer protective layer, which covers the outer periphery of the armor layer.

[0014] As a preferred technical solution for the backbone optical cable, the thickness of the fan-shaped fiberglass sheet is 0.6mm to 1.2mm.

[0015] As a preferred technical solution for the backbone optical cable, the arc angle of the fan-shaped fiberglass sheet is 30°, 40°, 45° or 60°.

[0016] As a preferred technical solution for the backbone optical cable, the armor layer is formed by longitudinally wrapping steel tape around the outer periphery of the protective layer.

[0017] As a preferred technical solution for the skeleton optical cable, the skeleton optical cable further includes a reinforcing member, the skeleton includes a central hole, and the reinforcing member is placed in the central hole.

[0018] As a preferred technical solution for the backbone optical cable, the first wrapping layer is formed by spirally winding mica tape around the outer periphery of the backbone.

[0019] As a preferred technical solution for the skeleton optical cable, the skeleton optical cable further includes a second wrapping layer, which is placed between the protective layer and the armor layer, and is formed by spirally winding mica tape around the outer periphery of the protective layer.

[0020] As a preferred technical solution for the backbone optical cable, a tear cord is provided inside the first wrapping layer; and / or, a tear cord is provided inside the second wrapping layer.

[0021] As a preferred technical solution for the backbone optical cable, the inner sheath is made of polyvinyl chloride or low-smoke halogen-free flame-retardant polyolefin.

[0022] And / or, the outer protective layer is made of polyvinyl chloride or low-smoke halogen-free flame-retardant polyolefin.

[0023] As a preferred technical solution for the skeleton optical cable, the skeleton optical cable further includes a water-blocking layer, which is placed between the skeleton and the first wrapping layer, and the water-blocking layer is formed by longitudinally wrapping a water-blocking tape around the outer periphery of the skeleton.

[0024] The beneficial effects of this utility model are as follows:

[0025] 1. A protective layer is formed by surrounding the inner sheath with multiple fan-shaped fiberglass sheets. Fiberglass, with its high strength and corrosion resistance, provides excellent rodent protection, resisting rodent damage. The fan-shaped arrangement of the fiberglass sheets ensures a tight fit between adjacent sheets, preventing rodents from tearing the protective layer through gaps. This provides excellent rodent protection for the backbone optical cable, preventing damage to the internal fiber optic ribbon and ensuring communication quality. Simultaneously, an armor layer covers the outer perimeter of the protective layer, providing dual rodent protection and enhancing the backbone optical cable's overall rodent resistance. The tight fit between adjacent fan-shaped fiberglass sheets prevents moisture from entering the backbone optical cable through the gaps, avoiding corrosion of the fiber optic ribbon and ensuring communication quality. Furthermore, the protective layer is resistant to moisture erosion, preventing water vapor from pipes and soil from damaging the protective layer and extending its service life.

[0026] 2. By covering the outer perimeter of the protective layer with an armor layer, and then covering the outer perimeter of the armor layer with an outer sheath, and using fiberglass as the high-strength material, the protective layer can improve the compression resistance of the skeleton optical cable when it is impacted by gravel, reducing the risk of deformation and enabling the skeleton optical cable to withstand gravel impacts. At the same time, the outer sheath, armor layer, and protective layer provide multiple layers of protection for the interior of the skeleton optical cable, effectively reducing the risk of internal fiber ribbon breakage. Additionally, when the skeleton optical cable is impacted by gravel, the inner sheath can provide a certain buffering effect, reducing the degree of deformation of the outer sheath, armor layer, and protective layer when impacted by gravel, thereby reducing the degree of deformation of the skeleton optical cable and extending its service life. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the skeleton optical cable provided by this utility model;

[0028] Figure 2 This is a schematic diagram of the cross-section of the annular fiberglass sheet provided by this utility model.

[0029] In the picture:

[0030] 1. Skeleton; 2. Fiber optic ribbon; 3. First wrapping layer; 4. Inner protective layer; 5. Protective layer; 51. Fan-shaped fiberglass sheet; 6. Second wrapping layer; 7. Outer protective layer; 8. Reinforcing member; 9. Armor layer; 10. Tear rope; 11. Water-blocking layer. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0035] like Figure 1 and Figure 2 As shown in the illustration, this embodiment provides a skeleton optical cable, including a skeleton 1, multiple optical fiber ribbons 2, a first wrapping layer 3, an inner sheath 4, a protective layer 5, an armor layer 9, and an outer sheath 7. The skeleton 1 includes a skeleton groove, within which the multiple optical fiber ribbons 2 are placed. The first wrapping layer 3 covers the outer periphery of the skeleton 1 to prevent the optical fiber ribbons 2 from falling out of the skeleton groove. The inner sheath 4 covers the outer periphery of the first wrapping layer 3, and the protective layer 5 covers the outer periphery of the inner sheath 4. The protective layer 5 is formed by multiple fan-shaped fiberglass sheets surrounding the outer periphery of the inner sheath 4. The armor layer 9 covers the outer periphery of the protective layer 5 to prevent the fan-shaped fiberglass sheets 51 from falling out, and the outer sheath 7 covers the outer periphery of the armor layer 9.

[0036] The skeleton optical cable provided in this embodiment forms a protective layer 5 by surrounding the inner sheath 4 with multiple fan-shaped annular fiberglass sheets 51. Fiberglass, with its high strength and corrosion resistance, provides excellent rodent resistance and prevents rodent damage. The fan-shaped annular arrangement of the fiberglass sheets ensures a tight fit between adjacent sheets, preventing rodents from tearing the protective layer 5 through gaps. This enhances the rodent resistance of the skeleton optical cable and prevents the internal fiber optic ribbon 2 from being damaged, thus ensuring the communication quality of the skeleton optical cable. Simultaneously, an armor layer 9 covers the outer periphery of the protective layer 5, providing dual rodent protection and further improving the rodent resistance of the skeleton optical cable. The tight fit between adjacent fan-shaped annular fiberglass sheets 51 prevents moisture from entering the skeleton optical cable through the gaps, avoiding corrosion of the fiber optic ribbon 2 and ensuring the communication quality of the skeleton optical cable. Furthermore, the protective layer 5 is resistant to moisture erosion, preventing moisture from pipes and soil from corroding the protective layer 5 and ensuring its service life. By covering the outer periphery of the protective layer 5 with an armor layer 9, and the outer periphery of the armor layer 9 with an outer sheath 7, and using fiberglass material with high strength characteristics, when the skeleton optical cable is impacted by gravel, the protective layer 5 can improve the compression resistance of the skeleton optical cable, reduce the risk of deformation of the skeleton optical cable, and enable the skeleton optical cable to withstand gravel impact. At the same time, the outer sheath 7, armor layer 9 and protective layer 5 provide multiple protections for the interior of the skeleton optical cable, effectively reducing the risk of breakage of the internal optical fiber ribbon 2. Meanwhile, when the skeleton optical cable is impacted by gravel, the inner sheath 4 can play a certain buffering role, reducing the degree of deformation of the outer sheath 7, armor layer 9 and protective layer 5 when impacted by gravel, thereby reducing the degree of deformation of the skeleton optical cable and extending the service life of the skeleton optical cable.

[0037] Among them, fiberglass material is lightweight, which can avoid the overall weight of the skeleton optical cable and facilitate the handling and laying of the skeleton optical cable.

[0038] In this embodiment, the thickness of the annular fiberglass sheet 51 is 0.6mm to 1.2mm. If the annular fiberglass sheet 51 is too thin, the impact resistance of the protective layer 5 will be reduced, which will affect the impact resistance of the skeleton optical cable, thus affecting the service life and communication quality of the skeleton optical cable. If the annular fiberglass sheet 51 is too thick, it will be inconvenient to process the annular fiberglass sheet 51, and at the same time, the overall diameter of the skeleton optical cable will be too large, making it inconvenient to lay and transport the skeleton optical cable.

[0039] In this embodiment, the arc angle of the fan-shaped fiberglass sheet 51 is 30°, 45° or 60°, where 30°, 45° or 60° are commonly used specifications in industrial processing. This facilitates the processing of the fan-shaped fiberglass sheet 51 and allows the number of fan-shaped fiberglass sheets 51 to be an integer, reducing the processing difficulty of the skeleton optical cable.

[0040] In this embodiment, the armor layer 9 is formed by longitudinally wrapping steel tape around the outer periphery of the protective layer 5. Compared with aluminum or copper tape, steel tape has higher overall hardness, which can further improve the performance of the skeleton optical cable in resisting the impact of gravel, further reduce the deformation of the skeleton optical cable when subjected to gravel impact, and ensure that the internal optical fiber tape 2 is not damaged, so that the skeleton optical cable can stably transmit information.

[0041] In this embodiment, the skeleton optical cable also includes a reinforcing member 8. Specifically, the skeleton 1 includes a central hole, and the reinforcing member 8 is placed inside the central hole. The reinforcing member 8 can improve the tensile strength of the skeleton optical cable, thereby further extending its service life. The reinforcing member 8 can be formed by twisting steel wires. When the skeleton optical cable is buried underground, it can further improve the compressive strength of the skeleton optical cable, making the design of the skeleton optical cable more rational.

[0042] In this embodiment, the first wrapping layer 3 is formed by spirally winding mica tape around the outer periphery of the skeleton 1 to prevent the inner optical fiber tape 2 of the skeleton groove from falling off. Furthermore, the skeleton optical cable also includes a second wrapping layer 6, which is placed between the protective layer 5 and the armor layer 9. The second wrapping layer 6 is formed by spirally winding mica tape around the outer periphery of the protective layer 5. The second wrapping layer 6 allows the multiple annular fiberglass sheets 51 in the protective layer 5 to be more compact, thereby making the interior of the skeleton optical cable more compact, improving the roundness of the skeleton optical cable, and further improving the compressive strength of the skeleton optical cable. Simultaneously, both the first wrapping layer 3 and the second wrapping layer 6 are made of mica tape, which has a certain flame-retardant property. When the skeleton optical cable burns, while the inner sheath 4 and the outer sheath 7 have a flame-retardant effect, the first wrapping layer 3 and the second wrapping layer 6 can also delay the spread of fire, further improving the flame-retardant property of the skeleton optical cable and giving escape personnel a certain amount of time to escape.

[0043] Furthermore, a tear cord 10 is provided inside the first wrapping layer 3; and / or, a tear cord 10 is provided inside the second wrapping layer 6. The tear cord 10 facilitates the easier stripping of the skeleton optical cable by workers, thus facilitating skeleton optical cable maintenance and splicing. Both the first wrapping layer 3 and the second wrapping layer 6 are made of mica tape, which facilitates the assembly of the tear cord 10 and reduces the processing difficulty of the skeleton optical cable. The tear cord 10 can be provided either inside the first wrapping layer 3 or inside the second wrapping layer 6. Alternatively, it can be provided simultaneously in both the first wrapping layer 3 and the second wrapping layer 6; no specific limitation is imposed here.

[0044] In this embodiment, the inner sheath 4 is made of polyvinyl chloride (PVC) or low-smoke halogen-free flame-retardant polyolefin; and / or, the outer sheath 7 is made of PVC or low-smoke halogen-free flame-retardant polyolefin. PVC and low-smoke halogen-free flame-retardant polyolefin, being materials with high flame retardancy used in sheath fabrication, ensure that the inner and outer sheaths 4 and 7, while meeting compressive strength requirements, also possess high flame retardancy, further improving the flame retardancy of the optical fiber skeleton cable.

[0045] In this embodiment, the skeleton optical cable further includes a water-blocking layer 11, which is placed between the skeleton 1 and the first wrapping layer 3. The water-blocking layer 11 is formed by longitudinally wrapping a water-blocking tape around the outer periphery of the skeleton 1. The water-blocking layer 11 can further improve the skeleton optical cable's resistance to water vapor on the basis of the protective layer 5, reduce the risk of water vapor entering the skeleton optical cable and eroding the optical fiber ribbon 2, and further improve the service life of the skeleton optical cable.

[0046] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A skeleton optical cable, characterized in that, include: A skeleton (1) and multiple fiber ribbons (2), wherein the skeleton (1) includes a skeleton groove and the multiple fiber ribbons (2) are placed in the skeleton groove; The first wrapping layer (3) covers the outer periphery of the skeleton (1); Inner protective layer (4), which covers the outer periphery of the first wrapping layer (3); A protective layer (5) is formed by covering the outer periphery of the inner protective layer (4) and the protective layer (5) is formed by multiple fan-shaped fiberglass sheets (51) surrounding the outer periphery of the inner protective layer (4). An armor layer (9) is provided, which covers the outer periphery of the protective layer (5); Outer protective layer (7) covers the outer periphery of the armor layer (9).

2. The skeleton optical cable according to claim 1, characterized in that, The thickness of the annular fiberglass sheet (51) is 0.6 mm to 1.2 mm.

3. The skeleton optical cable according to claim 1, characterized in that, The arc angle of the fan-shaped fiberglass sheet (51) is 30°, 40°, 45° or 60°.

4. The skeleton optical cable according to claim 1, characterized in that, The armor layer (9) is formed by longitudinally wrapping steel strips around the outer periphery of the protective layer (5).

5. The skeleton optical cable according to claim 1, characterized in that, The skeleton optical cable also includes a reinforcing member (8), the skeleton (1) includes a central hole, and the reinforcing member (8) is placed in the central hole.

6. The skeleton optical cable according to claim 1, characterized in that, The first wrapping layer (3) is formed by spirally winding mica tape around the outer periphery of the skeleton (1).

7. The skeleton optical cable according to claim 6, characterized in that, The skeleton optical cable also includes a second wrapping layer (6), which is placed between the protective layer (5) and the armor layer (9). The second wrapping layer (6) is formed by spirally winding mica tape around the outer periphery of the protective layer (5).

8. The skeleton optical cable according to claim 7, characterized in that, The first wrapping layer (3) is provided with a tear cord (10); and / or, the second wrapping layer (6) is provided with a tear cord (10).

9. The skeleton optical cable according to claim 1, characterized in that, The inner protective layer (4) is made of polyvinyl chloride or low-smoke halogen-free flame-retardant polyolefin. And / or, the outer protective layer (7) is made of polyvinyl chloride or low-smoke halogen-free flame-retardant polyolefin.

10. The skeleton optical cable according to claim 1, characterized in that, The skeleton optical cable also includes a water-blocking layer (11), which is placed between the skeleton (1) and the first wrapping layer (3). The water-blocking layer (11) is formed by longitudinally wrapping a water-blocking tape around the outer periphery of the skeleton (1).

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