Intermittent framework optical cable easy to draw out and connect

Abstract

The invention relates to the technical field of optical fibers and cables, and particularly discloses an intermittent framework easy-to-pull-out optical cable which comprises a framework, an optical unit, an outer sheath and a color strip. The framework is composed of feeder lines, non-metal reinforcing cores, edges and a framework sheath. The framework axially extends outwards in the radial direction to form a plurality of ridges which are intermittently distributed in the longitudinal axial direction of the framework; a plurality of strands of optical units are arranged and are uniformly distributed in the space at the periphery of the framework; the skeleton and the optical unit are wrapped by an outer sheath. The outer wall of the outer sheath is provided with a plurality of groups of color strips with different colors, and the color strips are used for positioning the light unit. The intermittent framework optical cable easy to draw out and connect is excellent in comprehensive performance, and compared with a traditional framework structure, the unique intermittent framework structure has the advantages that the optical units are distributed in the optical cable in a curve mode, and the tensile capacity of the optical cable can be effectively improved; the optical units and the reinforcing members are separated one by one and do not interfere with each other, so that the optical units and the reinforcing members can be used in a longer distance. When the optical cable is damaged and has a breakpoint, the feeder line is used to position the breakpoint, which is more convenient and efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber cables, and more particularly to an intermittent skeleton easily spliced optical cable. Background Art

[0002] With the wide application of home broadband, the end optical cable access distribution points are numerous and extensive. During the network construction process, with the increase in the optical network coverage rate, the traditional laying scheme shows signs of fatigue. The cables are complex and difficult to manage, frequent splicing affects the network quality, and the problems of high wiring difficulty and high construction cost also need to be solved, and the later maintenance and management are also very difficult.

[0003] To solve the above problems, easily spliced optical cables are being widely promoted in the market. Its wiring mode is to lay the optical cable once, and the optical units are spliced as needed. It has the advantages of fewer breakpoints, more stable links, and smaller optical attenuation, and can well solve the pain points of traditional wiring. Traditional easily spliced optical cables are mostly in a bundle structure. In short-distance splicing and laying, the optical units can be easily taken out of the optical cable. However, when the distance is greater than 20m or longer, due to the interference between the optical units, there is a risk of optical unit breakage during the construction process. Therefore, there is an urgent need for an easily spliced optical cable with excellent performance to meet the long-distance splicing and laying scenarios.

[0004] For example, in the prior art, CN115657232A discloses an indoor easily spliced optical cable, which includes: a plurality of receiving cavities are provided in an optical unit support frame; the optical units located in the receiving cavities, and the outer wall of the optical unit support frame is provided with a pick-and-place opening communicating with the receiving cavity and used for picking and placing the optical units. Under normal circumstances, the optical units are located in the receiving cavities and are limited and protected by the optical unit support frame; when splicing is required, the color of the optical unit can be directly and accurately identified through the pick-and-place opening, and then the optical unit to be spliced is taken out to the outside of the optical unit support frame according to the selected color, and then the optical unit returns to the receiving cavity after the connection is completed.

[0005] Another example is in the prior art, CN214409401U discloses a skeleton type spliced optical cable, including a sheath, a plurality of carriers and a plurality of optical unit groups. The plurality of carriers are all arranged on the periphery of the sheath and are spaced along the circumferential direction of the sheath. Each carrier has a distinguishing feature for distinguishing it from the other carriers, and an inner cavity is provided in the carrier. The plurality of optical unit groups are respectively assembled in the inner cavities of the plurality of carriers. The optical unit group includes a plurality of optical units, and the optical units in each optical unit group have distinguishing features for distinguishing them from the other optical units in the same optical unit group.

[0006] The above two existing technologies have the following defects: 1. The tensile property of the optical cable is poor; 2. It is relatively inconvenient to take out the splicing optical unit; 3. When the optical cable is damaged, the break point is not easy to locate. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide an intermittent skeleton easy-to-take-out optical cable with more excellent comprehensive performance. Its unique intermittent skeleton structure can well separate the optical units, eliminating the extrusion interference between the optical units, ensuring that when constructing over a long distance, the optical units can also be easily extracted without excessive stress caused by mutual extrusion between them resulting in fiber breakage; at the same time, the optical units are distributed in the optical cable in a curve form, which can effectively improve the tensile property of the optical cable.

[0008] The technical solution adopted by the present invention to solve the above technical problem is: An intermittent skeleton easy-to-take-out optical cable, comprising a skeleton, optical units, an outer sheath and a plurality of color strips. The skeleton extends radially outward to form a plurality of edges, and the space inside the optical cable is divided into an independent space by two adjacent edges; a plurality of strands of the optical units are provided, and the plurality of strands of the optical units are evenly distributed in the space outside the periphery of the skeleton; the skeleton and the optical units are wrapped with an outer sheath; a plurality of color strips for positioning the optical units are provided on the outer wall of the outer sheath.

[0009] The skeleton also has a feeder line and a plurality of non-metallic strengthening cores. The feeder line is placed at the exact center of the skeleton; the plurality of non-metallic strengthening cores are evenly distributed around the feeder line and do not contact the feeder line; the edges are evenly distributed on the periphery of the skeleton, and the edges are composed of a plurality of edge segments, and the plurality of edge segments are distributed intermittently along the axial direction; a skeleton sheath is wrapped around the periphery of the skeleton.

[0010] Further, the feeder line is a pure copper conductor with a diameter not greater than 1.0 mm, and the position of the optical cable can be quickly located through the copper conductor; Further, the non-metallic strengthening core is a yarn twisted by high-modulus aramid or fiberglass, and flexible FRP is an optional solution. The number of them is not less than 4 strands, and the minimum distance from the feeder line is not less than 0.1 mm.

[0011] Further, the number of the edges is the same as that of the optical units; the space inside the optical cable is divided into an independent space by two adjacent edges, and the space can accommodate only one optical unit; in order to be able to easily take out the optical unit from the optical cable, the duty ratio of the optical unit in a single space cannot be higher than 50%, and preferably the radial height of the corresponding edge is 1.1 to 1.5 times the diameter of the optical unit.

[0012] Further, along the axial direction of the skeleton, from left to right, the distance from the nth segment of each rib to the left end of the optical cable is equal, where n is a positive integer, the length of the rib segment does not exceed 10 cm, and the distance between two adjacent rib segments of the same rib is 50 - 200 cm. The skeleton has a central axis, and each rib has a corresponding axial connection line; the optical unit passes through the intervals between all adjacent rib segments of the corresponding rib in a wavy form along the axial connection line of the corresponding rib. By controlling the distance between two adjacent rib segments axially, it is ensured that the deviation angle between the tangent line of the wavy traveling route of the optical unit at any point within the skeleton and the corresponding axial connection line does not exceed 15°; when the number of optical units is not less than 6, after it walks one wavy cycle along the corresponding axial connection line, the maximum angle by which it deviates from the central axis of the skeleton does not exceed 60°.

[0013] Further, the optical unit is a 2 - 12 - core micro - tube, with an outer diameter of 0.9 - 1.5 mm. The optical fiber is preferably a G.657 - type optical fiber with excellent bending resistance; the colors of the optical units are different, which is convenient for quick identification during the splicing of the optical cable.

[0014] Further, the material of the outer sheath is halogen - free flame - retardant polyolefin (LSZH) or other materials with flame - retardant properties, with a thickness of at least 0.9 mm and an outer diameter not exceeding 12 mm.

[0015] Further, in order to locate the optical unit to be spliced, 3 groups of color bars are evenly distributed on the outer circumference of the outer sheath. The color bars have different colors and are different from the color of the outer sheath.

[0016] Further, the skeleton sheath is provided with embedding grooves equal in number to the number of optical units. The embedding grooves pass through the intervals between all adjacent rib segments of the corresponding rib in a wavy form along the axial connection line of the corresponding rib. The embedding grooves do not contact all the rib segments of the corresponding rib, and the optical units are embedded in the corresponding embedding grooves.

[0017] Compared with the prior art, the present invention has the following advantages: (1) The present invention adopts a special intermittent skeleton structure. Compared with the traditional skeleton structure, the optical units can be distributed in the optical cable in a curve form rather than a straight line form, which can effectively improve the tensile strength of the optical cable; compared with the traditional spiral stranding or SZ stranding structure, since the optical units do not rotate around the central axis of the optical cable by 1 axis, during the splicing process of the optical units, the stress received is small, which is more convenient for the splicing of the optical units. (2) In the present invention, the optical units and the strengthening members are separated from each other one by one, without interference between each other, and the occupancy ratio of the optical units in the space they occupy is less than 50%, which is more convenient for long - distance splicing use. (3) The feeder copper conductor is added to the framework of the present invention. During the actual construction of the optical cable, the optical unit will be cut off and taken out for use, and there will be breakpoints in the optical unit itself. When there are breakpoints due to damage to the optical cable, it is more convenient and efficient to use the feeder to locate the breakpoints.

[0018] (4) An embedding groove is provided. When the optical unit needs to be taken out from the first tapping point, after the optical unit detaches from the embedding groove near the first tapping point, due to the pulling force on the optical unit, the optical unit contacts the prism near the first tapping point. As a result, the heights of the peaks and valleys of the optical unit near the first tapping point decrease, and the optical unit taken out from the first tapping point is relatively longer, which is more convenient for construction. Description of the Drawings

[0019] Figure 1 It is a cross-sectional view of Embodiment 1 of the present invention.

[0020] Figure 2 It is a three-dimensional structural schematic diagram of the framework of Embodiment 1 of the present invention.

[0021] Figure 3 It is a side view of the structure of Embodiment 1 of the present invention.

[0022] Figure 4 It is a tapping schematic diagram of Embodiment 1 of the present invention.

[0023] Figure 5 It is a side view of the structure of Embodiment 2 of the present invention.

[0024] In the figure: 1. Framework, 101. Feeder, 102. Non-metallic strengthening core, 103. Edge, 104. Framework sheath, 2. Optical unit, 3. Outer sheath, 4. Color strip, 5. First tapping point, 6. Second tapping point, 7. Embedding groove, l1. Central axis, l2. Axial connection line. Detailed Embodiment

[0025] The present invention will be further described in conjunction with the accompanying drawings and embodiments.

[0026] Embodiment 1: Refer to Figure 1 and Figure 2, an embodiment of the present invention provides an intermittent backbone easy-to-splice optical cable, which includes a backbone 1, an optical unit 2, an outer sheath 3, and color stripes 4. The backbone 1 radially extends outward to form a plurality of ribs 103, and the space inside the optical cable is divided into an independent space by two adjacent ribs 103; a plurality of optical units 2 are provided, and the specific number is specifically set according to the required capacity. In the embodiment of the present invention, 6 optical units are used for illustration. The 6 optical units 2 are evenly distributed in the space outside the periphery of the backbone 1; the optical unit 2 is a 2-12 core microduct, and its outer diameter is 0.9-1.5 mm. The optical fiber is preferably a G.657 type optical fiber with excellent bending resistance; the backbone 1 and the optical unit 2 are wrapped with an outer sheath 3. The material of the outer sheath 3 is halogen-free flame-retardant polyolefin (LSZH), its thickness is not less than 0.9 mm, and its outer diameter does not exceed 12 mm; 3 color stripes 4 are provided on the outer wall of the outer sheath 3. The colors of the color stripes 4 are different from each other and different from the color of the outer sheath 3. Each color stripe 4 corresponds to positioning at least 2 groups of optical units 2. In order to splice more efficiently, the colors of the optical units are different, that is, each color stripe 4 can only position the optical unit 2 of a fixed color.

[0027] The backbone 1 is composed of a feeder 101, a non-metallic strengthening core 102, a rib 103, and a backbone sheath 104. The feeder 101 is placed at the center of the backbone 1. The feeder 101 can use a pure copper conductor with a diameter not greater than 1.0 mm, such as 24 AWG copper wire, for the rapid positioning of the optical cable; not less than 4 non-metallic strengthening cores 102 are evenly distributed around the feeder 101 and do not directly contact it. The minimum distance between the non-metallic strengthening core 102 and the feeder 101 is not less than 0.1 mm. The non-metallic strengthening core 102 is preferably a yarn stranded by high-modulus aramid or fiberglass. Soft FRP can also be used as an alternative. In this embodiment, the feeder 101 and the non-metallic strengthening core 102 are separated, which can effectively prevent the feeder 101 from moving when the optical cable is bent, and can also be separated in time when the feeder 101 is needed; at the same time, during the actual construction of the optical cable, the optical unit 2 will be cut and taken out according to needs. When there is a breakpoint in the optical cable that cannot be observed by the naked eye, since there are already breakpoints in the optical fibers in the optical cable, it is easy to cause misunderstandings. Using the feeder to locate the breakpoint of the optical cable is both accurate and efficient.

[0028] The skeleton 1 has multiple axially extending edges 103, and the specific number is the same as that of the optical units 2. In this embodiment, the number is set to 6. The 6 edges 103 are evenly distributed on the outer periphery of the skeleton 1. Along the axial direction of the skeleton 1, the edge 103 is composed of multiple edge segments, and the multiple edge segments are intermittently distributed. From left to right, the distance from the nth edge segment of each edge 103 to the left end of the optical cable is equal, where n is a positive integer; the 6 edges 103 divide the interior of the optical cable into 6 independent spaces, and each space can accommodate only 1 optical unit 2. Specifically, during implementation, the radial height of the edge 103 is 1.1 to 1.5 times the diameter of the optical unit 2, ensuring that the duty ratio of the optical unit 2 in this space does not exceed 50%, and avoiding the phenomenon of damage and breakage of the optical unit due to overly compact space during the splicing process.

[0029] Referring to Figure 2 and Figure 3 As shown, on the same cross-section, there are 6 groups of the edges 103, which correspond to the optical units 2 one by one. Along the axial direction of the skeleton 1, the length of each edge segment does not exceed 10 cm, and the distance between two adjacent edge segments is 50 to 200 cm. The skeleton 1 has a central axis l1, and each edge 103 has a corresponding axial connection line l2; the optical unit 2 passes through the intervals between all adjacent edge segments of the corresponding edge 103 in a wavy line along the axial connection line l2 of the corresponding edge 103.

[0030] Specifically, during implementation, for a more intuitive understanding, we label the spaces formed by the 6 edges 103 as A to F. Along the axial direction of the skeleton 1, the 6 edges 103 will successively form spaces such as A1 to F1, A2 to F2... Taking one group of optical units 2 as an example: Suppose the initial point of the optical unit 2 is located in the space A1. During production, as the skeleton 1 always moves forward, when the optical unit 2 moves forward, it needs to rotate counterclockwise by 60° synchronously and reach the space B2, and then rotate clockwise by 60° synchronously to reach the space A3, and so on. The distance between two adjacent axially edge segments satisfies that the deviation angle between the tangent line at any point on the wavy traveling route of the optical unit 2 in the skeleton 1 and the corresponding axial connection line l2 does not exceed 15°. When the number of optical units is 6, after it walks a wavy cycle along the corresponding axial connection line l2, the angle by which it deviates from the central axis l1 of the optical cable does not exceed 60°. Compared with the traditional skeleton structure, the optical units are distributed in the optical cable in a curve form rather than a straight line, which can effectively improve the tensile strength of the optical cable; compared with the traditional spiral stranded or SZ stranded optical cable structure, since the optical unit does not rotate one week along the central axis of the optical cable, the stress on the optical unit during the splicing process is small, and it is easier to achieve splicing.

[0031] Referring to Figure 4As shown in the figure, when the number of optical units 2 exceeds 6 groups, the actual rotation angle of each group of optical units 2 around the central axis l1 of the skeleton 1 will not exceed 60°, that is, each color bar 4 can be positioned to no less than 2 groups of optical units 2. When laying the optical cable, first find the color bar 4 corresponding to the optical unit 2, use a tool to cut open the outer sheath 3 at the first tapping point 5, and cut off the required optical unit 2; then at the second tapping point 6 where tapping is required, find the corresponding color bar 4, use a tool to cut open the position of the color bar 4, find the required optical unit 2, and take it out, and the separated optical fibers are subjected to corresponding fusion and splicing.

[0032] Embodiment 2: As Figure 5 , this embodiment is basically the same as Embodiment 1, the difference is that: the skeleton sheath 104 is provided with embedding grooves 7 equal in number to the number of optical units 2, and the embedding grooves 7 pass through the intervals between all adjacent edge segments of the corresponding edge 103 in a wavy line along the axial connection line l2 of the corresponding edge 103, and the embedding grooves 7 do not contact all the edge segments of the corresponding edge 103, and the optical units 2 are embedded in the corresponding embedding grooves 7.

[0033] When the optical unit 2 needs to be taken out from the first tapping point 5, due to the pulling force on the optical unit 2, after the optical unit 2 breaks away from the embedding groove 7 near the first tapping point 5, the optical unit 2 contacts the prism near the first tapping point 5, so that the heights of the wave peaks and wave valleys of the optical unit 2 near the first tapping point 5 are reduced, and the optical unit 2 taken out from the first tapping point 5 is relatively longer, which is more convenient for construction. In summary, the intermittent skeleton easy-tapping optical cable of the present invention has excellent comprehensive performance. Its unique intermittent skeleton structure, compared with the traditional skeleton structure, the optical units are distributed in the optical cable in a curve form, which can effectively improve the tensile strength of the optical cable; the optical units and the strengthening members are separated from each other one by one and there is no interference between them, and the optical units can be used for tapping at a farther distance; when there is a break point in the damaged optical cable, the feeder is used to locate the break point, which is more convenient and efficient.

[0034] This application can be used as an intelligent sensor and an intelligent sensing element; since it can transmit voice and images, it can also be used as a physical sensor, such as a voice sensor and an image sensor; since it transmits optical signals through the total reflection principle, it can also be used as a distance sensor; the optical fiber in this application itself is an optical waveguide, so it can be used as an optical waveguide, such as an array optical waveguide and a diffraction optical waveguide; this application can also be used in the field of optical computing, as part of optical computing, optical computing, and optical network computing, and as optical chip computing.

[0035] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be defined by the claims.

Claims

1. An intermittent skeleton easy-to-connect optical cable, comprising a skeleton (1), an optical unit (2), an outer sheath (3) and a plurality of color strips (4); characterized in that: The skeleton (1) radially extends outward to form a plurality of ridges (103), and two adjacent ridges (103) separate the interior of the optical cable into an independent space; the optical unit (2) is provided with a plurality of strands, and is evenly distributed in the space around the skeleton (1); the skeleton (1) and the optical unit (2) are wrapped with an outer sheath (3); the outer wall of the outer sheath (3) is provided with a plurality of color strips (4) for positioning the optical unit (2), and the color of the color strips (4) is different; The skeleton (1) also has a feeder (101) and a plurality of non-metallic reinforcing cores (102); the feeder (101) is placed at the center of the skeleton (1); the plurality of non-metallic reinforcing cores (102) are evenly distributed around the feeder (101) and do not contact the feeder (101); the edges (103) are evenly distributed on the periphery of the skeleton (1), the edges (103) are composed of a plurality of edge segments, and the plurality of edge segments are intermittently distributed along the axial direction; the skeleton (1) is wrapped with a skeleton sheath (104).

2. An intermittent skeleton easy-to-connect optical cable as claimed in claim 1, characterized in that: The feeder (101) is a pure copper conductor with a diameter not greater than 1.0 mm, and the optical cable position can be quickly located via the copper conductor.

3. The intermittent skeleton easy-to-connect optical cable according to claim 1, characterized in that: The non-metallic reinforcing core (102) is a yarn or flexible FRP twisted from high modulus aramid or glass yarn; the number of the non-metallic reinforcing core (102) is not less than 4 strands, and the minimum distance between the non-metallic reinforcing core (102) and the feeder (101) is not less than 0.1 mm.

4. The intermittent skeleton easy-to-connect optical cable according to claim 1, characterized in that: The number of the edges (103) is consistent with the number of light units (2), and the space can accommodate only one light unit (2).

5. The intermittent skeleton easy-to-connect optical cable according to claim 1, characterized in that: In order to easily remove the optical unit (2) from the optical cable, the occupancy ratio of the optical unit (2) in a single space is not higher than 50%, and the corresponding radial height of the ridge (103) is 1.1 to 1.5 times the diameter of the optical unit (2).

6. An intermittent skeleton-easy-to-connect optical cable as claimed in claim 5, characterized in that: Along the axial direction of the skeleton (1), from left to right, the distance from the nth edge segment of each edge (103) to the left end of the optical cable is equal, n is a positive integer, the length of the edge segment does not exceed 10 cm, and the distance between two adjacent edge segments of the same edge (103) is 50-200 cm; the skeleton (1) has a central axis, and each edge (103) has a corresponding axial connecting line; the optical unit (2) passes through the intervals between all adjacent edge segments of the corresponding edge (103) in the form of a wavy line along the axial connecting line of the corresponding edge (103).

7. An intermittent skeleton easy-to-connect optical cable as claimed in claim 6, characterized in that: The distance between two axially adjacent edge segments satisfies that the deviation angle between the tangent line of the light unit (2) at any point of the wavy line travel route in the skeleton (1) and the corresponding axial line will not exceed 15°; when the number of the light units (2) is not less than 6, after the light units (2) travel along the corresponding axial line for a wavy cycle, the maximum angle of deviation from the central axis of the skeleton will not exceed 60°.

8. The intermittent skeleton easy-to-connect optical cable according to claim 1, characterized in that: The optical unit (2) is a 2-12 core micro beam tube with an outer diameter of 0.9-1.5 mm, and the optical fiber is a G.657 type optical fiber with excellent bending resistance.

9. An intermittent skeleton easy-to-connect optical cable according to any one of claims 1 to 8, characterized in that: The outer sheath (3) is made of halogen-free flame-retardant polyolefin or other materials with flame-retardant properties, has a thickness of at least 0.9 mm, and an outer diameter of no more than 12 mm.

10. An intermittent skeleton easy-to-connect optical cable according to any one of claims 1 to 8, characterized in that: The skeleton sheath (104) is provided with embedding grooves (7) whose number is equal to the number of the light units (2); the embedding grooves (7) pass through the intervals between all adjacent edge segments of the corresponding edge (103) in the form of wavy lines along the axial lines of the corresponding edges (103); the embedding grooves (7) do not contact all the edge segments of the corresponding edges (103); and the light units (2) are embedded in the corresponding embedding grooves (7).

Images