Double-layer optical cable easy to draw out and connect

Abstract

The invention belongs to the field of optical cables, and particularly discloses a double-layer easily-pulled-out optical cable which comprises an outer protective layer and a cable core, the cable core comprises a center reinforcing piece and a loose tube, at least three first edges are arranged on the outer edge of the center reinforcing piece, and each first edge is composed of a plurality of first edge sections which are axially distributed at intervals. The loose tubes sequentially penetrate through intervals among all the corresponding first edge sections along the corresponding first edges in a wavy line mode, a framework is arranged outside the center reinforcing piece and comprises a plurality of framework sections arranged outside the center reinforcing piece in a sleeving mode, and each framework section comprises a framework section body and a plurality of second edge sections fixed to the outer edge of the framework section body. The loose tube sequentially penetrates through the intervals among all the second edge sections located on the same straight line in a wavy line mode, and optical fibers are arranged in the loose tube; the optical fiber has the beneficial effects of high fiber core density, convenience in connection of the loose tube and the like.

Description

Technical Field

[0001] This invention belongs to the field of optical cables, and in particular discloses a double-layer easy-to-split optical cable. Background Technology

[0002] With the increasing popularity of fiber-to-the-home (FTTH), the demand for construction efficiency is growing. Requirements have been put forward for construction to minimize damage to the original optical cable structure, to carry out construction without cutting the cable, and to avoid affecting the use of other users.

[0003] In the prior art, CN120195827A discloses an intermittent skeleton easy-to-split optical cable, including a skeleton, optical units, an outer sheath, and color stripes. The skeleton consists of a feed line, a non-metallic reinforcing core, ribs, and a skeleton sheath. The skeleton extends radially outward to form multiple ribs, which are intermittently distributed along the longitudinal axis of the skeleton; the optical units are provided with multiple strands, which are evenly distributed in the space around the outer periphery of the skeleton; the skeleton and optical units are wrapped with an outer sheath; multiple sets of color stripes of different colors are provided on the outer wall of the outer sheath for positioning the optical units; The aforementioned existing technology has the following drawbacks: it only has a single-layer loose tube and the fiber core density is low.

[0004] In the prior art, for example, CN211528778U discloses a double-layer loose tube fully dry optical cable based on foam water-blocking material. From the inside out, it includes a fiber-reinforced core column, a polyethylene-coated hexagonal tube, a foamed rubber round tube, an optical cable core, a polyethylene rubber inner sheath, an armor layer, a copper mesh shielding layer, and an anti-electro-tracking outer sheath. The gap between each turn of the optical cable core is filled with a foam filling layer, and a water-blocking tape is wrapped between adjacent turns of the optical cable core. The optical cable core is composed of optical fiber, an internal foam filling layer, aramid cloth, loose tube, and aluminum sheath. The armor layer is a soft armor structure formed by concentrically twisting and fusing multiple aramid fiber rods.

[0005] The aforementioned existing technology has the following drawbacks: 1. During construction, it is necessary to completely destroy the protective sleeve at one end, and the loose tube cannot be removed from the middle of the optical cable; 2. When taking the optical fiber inside the inner loose tube, it is necessary to completely loosen the outer loose tube, and the inner loose tube cannot be directly removed from the middle of the cable core. Summary of the Invention

[0006] To address the aforementioned problems, the present invention aims to disclose a double-layer easy-to-split optical cable, which is achieved using the following technical solution.

[0007] A double-layer easy-to-split optical cable includes an outer sheath and a cable core, wherein the outer sheath is extruded outside the cable core; The cable core includes a central reinforcing member and a loose tube. At least three first edges of the same height are uniformly provided around the axis of the central reinforcing member on the outer edge of the central reinforcing member. The first edges are parallel to the central reinforcing member. Each first edge is composed of a plurality of first edge segments of the same number. The first edge segments are distributed at intervals along the axial direction of the central reinforcing member. The central reinforcing member has the same number of loose tubes as the first edge. Each loose tube passes through the intervals between all segments of the first edge in a wavy line along the corresponding first edge. The central reinforcing member is surrounded by a skeleton, which includes multiple skeleton segments fitted along the length of the central reinforcing member. Each skeleton segment includes a skeleton segment body and multiple second ridge segments. The second ridge segments have the same height, and all second ridge segments are uniformly fixed to the outer edge of the skeleton segment body around the axis of the corresponding skeleton segment body. Projecting from left to right, the projections of the corresponding second edge segments of all skeleton segments completely overlap. The skeleton contains the same number of loose tubes as the second edge segments of a single skeleton segment. Each loose tube passes through the intervals between all the second edge segments located on the same straight line in the form of a wavy line. Each loose tube contains at least one optical fiber.

[0008] The aforementioned double-layer easy-to-split optical cable has two adjacent skeleton segments whose main bodies are connected.

[0009] The aforementioned double-layer easy-to-split optical cable has two adjacent skeleton segments whose main bodies are not connected, and the skeleton segments can be pushed along the length direction of the central reinforcing member.

[0010] The aforementioned double-layer easy-splitting optical cable has its core filled with cable grease for water blocking and lubrication.

[0011] In the aforementioned double-layer easy-to-split optical cable, from left to right, the distance between the nth segment of each first edge and the leftmost end is equal, where n≥2.

[0012] The aforementioned double-layer easy-to-split optical cable has the same number of second edge segments as the first edge segments, and the second edge segments and the first edge segments correspond one-to-one. When projected from left to right, the second edge segment and the corresponding first edge segment are located on the same straight line.

[0013] The aforementioned double-layer easy-to-split optical cable has a first segment length of less than or equal to 10cm.

[0014] The aforementioned double-layer easy-to-split optical cable has an nth segment of each first edge with equal length, and the spacing between two adjacent segments of the same first edge is 50~100cm. The aforementioned double-layer easy-to-split optical cable has a loose tube diameter in the central reinforcing member that is less than or equal to 1 / 2 of the minimum width between two adjacent first ridges, and a first ridge height that is greater than or equal to 1.2 times the diameter of the loose tube. The aforementioned double-layer easy-to-split optical cable has a second ridge segment whose length is 1 / 5 to 1 / 3 of the length of the corresponding skeleton segment.

[0015] The aforementioned double-layer easy-to-split optical cable has a loose tube diameter in the skeleton section that is less than or equal to 1 / 2 of the minimum width between two adjacent second rib sections, and a second rib section height that is greater than or equal to 1.2 times the diameter of the loose tube. A double-layer easy-to-split optical cable includes an outer sheath and a cable core, wherein the outer sheath is extruded outside the cable core; The cable core includes a central reinforcing member and a loose tube. The central reinforcing member is surrounded by a skeleton. The skeleton includes multiple skeleton segments sleeved along the length of the central reinforcing member. Each skeleton segment includes a skeleton segment body, at least three second edge segments of the same height, and at least three third edge segments of the same height. All second edge segments are uniformly fixed to the outer edge of the skeleton segment body around the axis of the skeleton segment body, and all third edge segments are uniformly fixed to the inner edge of the skeleton segment body around the axis of the skeleton segment body. The main bodies of two adjacent skeleton segments are not connected. When projected from left to right, the projections of the corresponding second edge segments of all skeleton segments completely overlap. The upper side of the main body of the skeleton segment is provided with the same number of loose tubes as the second edge segments of a single skeleton segment. Each loose tube passes through the gaps between all the second edge segments located on the same straight line in a wavy line. The lower side of the main body of the skeleton segment is provided with the same number of loose tubes as the third edge segments of a single skeleton segment. Each loose tube passes through the gaps between all the third edge segments located on the same straight line in a wavy line. At least one optical fiber is provided inside the loose tube.

[0016] The aforementioned double-layer easy-to-split optical cable has a one-to-one correspondence between the third edge segment and the second edge segment. When projected from left to right, the third edge segment and the corresponding second edge segment are located on the same straight line.

[0017] The aforementioned double-layer easy-to-split optical cable has a central reinforcing member with a number of slots spaced at intervals equal to the number of skeleton segments on its outer edge. Each slot group includes a number of fixing slots evenly arranged around the axis of the central reinforcing member, equal to the number of third ridge segments of the skeleton segments. The third ridge segments are inserted into the corresponding fixing slots.

[0018] The aforementioned double-layer easy-to-split optical cable has a spacing of 50~100cm between two adjacent sections.

[0019] The aforementioned double-layer easy-to-split optical cable has a second ridge segment whose length is 1 / 5 to 1 / 3 of the length of the corresponding skeleton segment.

[0020] The aforementioned double-layer easy-to-split optical cable has the following characteristics: the diameter of the loose tube on the upper side of the skeleton section is less than or equal to half the minimum width between two adjacent second rib segments, and the height of the second rib segment is greater than or equal to 1.2 times the diameter of the corresponding loose tube; the diameter of the loose tube on the lower side of the skeleton section is less than or equal to half the minimum width between two adjacent third rib segments, and the height of the third rib segment is greater than or equal to 1.2 times the diameter of the corresponding loose tube.

[0021] The aforementioned double-layer easy-splitting optical cable preferably uses G.657 type optical fiber with good bending performance.

[0022] The aforementioned double-layer easy-to-split optical cable has multiple colored stripes of different colors on the outer wall of the outer sheath for positioning the loose tube.

[0023] The aforementioned double-layer easy-to-split optical cable has an outer sheath made of low-smoke halogen-free flame-retardant material with a thickness of 1.0 mm to 1.2 mm.

[0024] The aforementioned double-layer easy-to-split optical cable uses polybutylene terephthalate as the material for its loose tube.

[0025] This application has the following beneficial effects: 1. It features a double-layered, loosely fitting tube with a larger number of fiber cores.

[0026] 2. When it is necessary to cut a notch in the skeleton section to access the second layer of loose tubing, only one skeleton section needs to be destroyed. The skeleton section is independent, and cutting one skeleton section will not cut the adjacent skeleton section, and the cutting is more convenient.

[0027] 3. The skeleton segment can move to both sides, so there is no need to damage the skeleton segment when taking out the second layer of loose sleeve, and it is more convenient to take out the second layer of loose sleeve.

[0028] 4. Spacing is formed on both the upper and lower sides of the skeleton section to accommodate loose sleeves, making manufacturing more convenient.

[0029] 5. The skeleton segments are not connected, which can reduce the use of skeleton segment materials, save costs, reduce weight, and reduce the difficulty of laying when using air blowing. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural schematic diagram of a segment of Embodiment 1 of the present invention.

[0031] Figure 2 This is the front view of Embodiment 1 of the present invention.

[0032] Figure 3 This is a three-dimensional structural diagram of the cable core according to Embodiment 1 of the present invention.

[0033] Figure 4 This is a three-dimensional structural diagram of the central reinforcing member in Embodiment 1 of the present invention.

[0034] Figure 5 This is a three-dimensional structural diagram of the skeleton segment of Embodiment 1 of the present invention.

[0035] Figure 6 This is a three-dimensional structural diagram of the cable core according to Embodiment 2 of the present invention.

[0036] Figure 7 This is a three-dimensional structural schematic diagram of a segment of Embodiment 3 of the present invention.

[0037] Figure 8 This is a three-dimensional structural diagram of the cable core according to Embodiment 3 of the present invention.

[0038] Figure 9 This is a three-dimensional structural diagram of the central reinforcing member in Embodiment 3 of the present invention.

[0039] Figure 10 This is the front view of the skeleton segment of Embodiment 3 of the present invention.

[0040] Figure 11 This is a three-dimensional structural diagram of the skeleton segment after the second loose sleeve is connected in Embodiment 1 of the present invention.

[0041] In the figure, the corresponding figures are as follows: 1. Outer sheath, 2. Skeleton segment, 21. Skeleton segment body, 22. Second ridge segment, 23. Second ridge segment interval, 24. Third ridge segment, 25. Third ridge interval, 26. Notch, 3. Loose tube, 4. Central reinforcement, 41. Central reinforcement body, 42. First ridge, 43. First ridge interval, 44. Fixing groove, 5. Optical fiber. Detailed Implementation

[0042] Example 1: As Figures 1 to 5 A double-layer easy-to-split optical cable includes an outer sheath 1 and a cable core, wherein the outer sheath 1 is extruded outside the cable core; The cable core includes a central reinforcing member 4 and a loose tube 3. The outer edge of the central reinforcing member 4 is uniformly provided with twelve first ridges 42 of the same height around the axis of the central reinforcing member 4. The first ridges 42 are parallel to the central reinforcing member 4. A first ridge interval 43 is formed between two adjacent first ridges 42. Each first ridge 42 is composed of a number of first ridge segments of the same number. The length of the first ridge segment is less than or equal to 10cm. The first ridge segments are distributed at intervals along the axial direction of the central reinforcing member 4. From left to right, the distance between the nth first edge segment of each first edge 42 and the leftmost end is equal, n≥2, the length of the nth first edge segment of each first edge 42 is equal, and the distance between two adjacent first edge segments of the same first edge 42 is 50~100cm. The central reinforcing member 4 is provided with the same number of loose tubes 3 as the first ridge 42. Each loose tube 3 passes through the interval between all the first ridge segments of the corresponding first ridge 42 in a wavy line. The diameter of the loose sleeve 3 is less than or equal to half the minimum width between the two adjacent first ridges 43, and the height of the first ridge 42 is greater than or equal to 1.2 times the diameter of the loose sleeve 3; The central reinforcing member 4 is provided with an outer skeleton. The skeleton includes multiple skeleton segments 2 sleeved along the length direction of the central reinforcing member 4. Each skeleton segment 2 includes a skeleton segment body 21 and twelve second rib segments 22 of the same height. The twelve second rib segments 22 are uniformly fixed to the outer edge of the skeleton segment body 21 around the axis of the skeleton segment body 21. A second rib segment interval 23 is formed between two adjacent second rib segments 22. The length of the second rib segment 22 is 1 / 5 to 1 / 3 of the length of the corresponding skeleton segment body 21. The main body 21 of the skeleton segments 2 of two adjacent skeleton segments 2 are connected. When projected from left to right, the projections of the corresponding second edge segments 22 of all skeleton segments 2 completely overlap. The skeleton is provided with the same number of loose tubes 3 as the second edge segments 22 of a single skeleton segment 2. Each loose tube 3 passes through the interval between all the second edge segments 22 located on the same straight line in the form of a wavy line. The diameter of the loose sleeve 3 is less than or equal to half the minimum width between the two adjacent second edge segments 23, and the height of the second edge segment 22 is greater than or equal to 1.2 times the diameter of the loose sleeve 3; The second edge segment 22 corresponds one-to-one with the first edge segment. When projected from left to right, the second edge segment 22 and the corresponding first edge segment are located on the same straight line. At least one optical fiber 5 is provided inside the loose tube 3, and the optical fiber 5 is preferably a G.657 type optical fiber with good bending performance. The outer wall of the outer sheath 1 is provided with multiple colored stripes of different colors for positioning the loose sleeve 3.

[0043] Example 2: Figure 6 and refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 A double-layer easy-to-split optical cable includes an outer sheath 1 and a cable core, wherein the outer sheath 1 is extruded outside the cable core; The cable core includes a central reinforcing member 4 and a loose tube 3. The cable core is filled with cable grease for water blocking and lubrication. The outer edge of the central reinforcing member 4 is uniformly provided with twelve first ridges 42 of the same height around the axis of the central reinforcing member 4. The first ridges 42 are parallel to the central reinforcing member 4. A first ridge interval 43 is formed between two adjacent first ridges 42. Each first ridge 42 is composed of a number of first ridge segments of the same number. The length of the first ridge segment is less than or equal to 10 cm. The first ridge segments are distributed at intervals along the axial direction of the central reinforcing member 4. From left to right, the distance between the nth first edge segment of each first edge 42 and the leftmost end is equal, n≥2, the length of the nth first edge segment of each first edge 42 is equal, and the distance between two adjacent first edge segments of the same first edge 42 is 50~100cm. The central reinforcing member 4 is provided with the same number of loose tubes 3 as the first ridge 42. Each loose tube 3 passes through the interval between all the first ridge segments of the corresponding first ridge 42 in a wavy line. The diameter of the loose sleeve 3 is less than or equal to half the minimum width between the two adjacent first ridges 43, and the height of the first ridge 42 is greater than or equal to 1.2 times the diameter of the loose sleeve 3; The central reinforcing member 4 is provided with an outer skeleton. The skeleton includes multiple skeleton segments 2 that are sleeved along the length direction of the central reinforcing member 4 and can be pushed along the length direction of the central reinforcing member 4. Each skeleton segment 2 includes a skeleton segment body 21 and twelve second rib segments 22 of the same height. The twelve second rib segments 22 are uniformly fixed to the outer edge of the skeleton segment body 21 around the axis of the corresponding skeleton segment body 21. A second rib segment interval 23 is formed between two adjacent second rib segments 22. The length of the second rib segment 22 is 1 / 5 to 1 / 3 of the length of the corresponding skeleton segment body 21. The main body 21 of the skeleton segments 2 of two adjacent skeleton segments 2 are not connected. When projected from left to right, the projections of the corresponding second edge segments 22 of all skeleton segments 2 completely overlap. The skeleton is provided with the same number of loose tubes 3 as the second edge segments 22 of a single skeleton segment 2. Each loose tube 3 passes through the interval between all the second edge segments 22 located on the same straight line in the form of a wavy line. The diameter of the loose sleeve 3 is less than or equal to half the minimum width between the two adjacent second edge segments 23, and the height of the second edge segment 22 is greater than or equal to 1.2 times the diameter of the loose sleeve 3; The second edge segment 22 corresponds one-to-one with the first edge segment. When projected from left to right, the second edge segment 22 and the corresponding first edge segment are located on the same straight line. At least one optical fiber 5 is provided inside the loose tube 3, and the optical fiber 5 is preferably a G.657 type optical fiber with good bending performance. The outer wall of the outer sheath 1 is provided with multiple colored stripes of different colors for positioning the loose sleeve 3.

[0044] Example 3: As Figures 7 to 10 A double-layer easy-to-split optical cable includes an outer sheath 1 and a cable core, wherein the outer sheath 1 is extruded outside the cable core; The cable core includes a central reinforcing member 4 and a loose tube 3. The outer edge of the central reinforcing member 4 is provided with multiple slot groups at intervals. Each slot group includes twelve fixed slots 44 evenly arranged around the axis of the central reinforcing member 4. The distance between two adjacent slot groups is 50~100cm. The central reinforcing member 4 is provided with an outer skeleton, which includes multiple skeleton segments 2 sleeved along the length of the central reinforcing member 4. Each skeleton segment 2 includes a skeleton segment body 21, twelve second edge segments 22 of the same height, and twelve third edge segments 24 of the same height. The twelve second edge segments 22 are uniformly fixed to the outer edge of the skeleton segment body 21 around the axis of the skeleton segment body 21. A second edge segment interval 23 is formed between two adjacent second edge segments 22. The length of the second edge segment 22 is 1 / 5 to 1 / 3 of the length of the corresponding skeleton segment body 21. The twelve third edge segments 24 are uniformly fixed to the inner edge of the skeleton segment body 21 around the axis of the corresponding skeleton segment body 21. A third edge segment interval 25 is formed between two adjacent third edge segments 24. The length of the third edge segment 24 is the same as that of the second edge segment 22. The third edge segment 24 and the second edge segment 22 correspond one-to-one. Projected from left to right, the third edge segment 24 and the corresponding second edge segment 22 are located on the same straight line. The third edge segment 24 is inserted into the corresponding fixing groove 44. The main body 21 of two adjacent skeleton segments 2 are not connected. When projected from left to right, the projections of the corresponding second edge segments 22 of all skeleton segments 2 completely overlap. The upper side of the main body 21 of the skeleton segment is provided with the same number of loose tubes 3 as the second edge segments 22 of a single skeleton segment 2. Each loose tube 3 passes through the interval between all the second edge segments 22 located on the same straight line in the form of a wavy line. The lower side of the main body 21 of the skeleton segment is provided with the same number of loose tubes 3 as the third edge segments 24 of a single skeleton segment 2. Each loose tube 3 passes through the interval between all the third edge segments 24 located on the same straight line in the form of a wavy line. The diameter of the loose tube 3 on the upper side of the skeleton segment 21 is less than or equal to half the minimum width between the two adjacent second edge segments 23, the height of the second edge segment 22 is greater than or equal to 1.2 times the diameter of the corresponding loose tube 3, the diameter of the loose tube 3 on the lower side of the skeleton segment 21 is less than or equal to half the minimum width between the two adjacent third edge segments 25, and the height of the third edge segment 24 is greater than or equal to 1.2 times the diameter of the corresponding loose tube 3. At least one optical fiber 5 is provided inside the loose tube 3, and the optical fiber 5 is preferably a G.657 type optical fiber with good bending performance. The outer wall of the outer sheath 1 is provided with multiple colored stripes of different colors for positioning the loose sleeve 3.

[0045] The aforementioned double-layer easy-to-split optical cable has an outer sheath 1 made of low-smoke halogen-free flame retardant material with a thickness of 1.0 mm to 1.2 mm.

[0046] The aforementioned double-layer easy-to-split optical cable has a loose tube 3 made of polybutylene terephthalate.

[0047] In Embodiment 1 of this application, when using the first layer of loose tube 3, the required loose tube 3 is located according to the color stripe on the outer sheath 1. A cutter is used to cut a notch at the corresponding position on the outer sheath 1. After removing a portion of the required loose tube 3 from the notch, it is cut off to use the internal optical fiber 5. When using the second layer of loose tube 3, the required loose tube 3 is located according to the color stripe on the outer sheath 1. A cutter is used to cut a notch at the corresponding position on the outer sheath 1, such as... Figure 11 Next, cut a notch 26 in the skeleton section 2 below the interface to widen the gap between the upper loose tubes 3. Then, use a hook tool to hook out a portion of the required loose tubes 3 of the second layer and cut it to use the internal optical fiber 5.

[0048] In Embodiment 2 of this application, when taking the first layer of loose tube 3, the required loose tube 3 is located according to the color strip on the outer sheath 1. A cutter is used to cut a notch at the corresponding position on the outer sheath 1. After a portion of the required loose tube 3 is removed from the notch, it is cut off to use the internal optical fiber 5. When taking the second layer of loose tube 3, the required loose tube 3 is located according to the color strip on the outer sheath 1. A cutter is used to cut a notch at the corresponding position on the outer sheath 1. The notch exposes two adjacent skeleton segments 2. The two skeleton segments 2 are pushed to both sides to increase the distance between them, so that the gap between the upper loose tubes 3 can be widened, making it easier to hook out the required loose tube 3 of the second layer. Then, a hook tool is used to hook out a portion of the required loose tube 3 of the second layer and cut off to use the internal optical fiber 5.

[0049] In Embodiment 3 of this application, when using the first layer of loose tube 3, the required loose tube 3 is located according to the color stripe on the outer sheath 1. A cutter is used to cut a notch at the corresponding position on the outer sheath 1. After a portion of the required loose tube 3 is removed from the notch, it is cut off to use the internal optical fiber 5. When using the second layer of loose tube 3, the required loose tube 3 is located according to the color stripe on the outer sheath 1. A cutter is used to cut a notch at the corresponding position on the outer sheath 1. When the distance between the two skeleton segments 2 is sufficient to hook out the required loose tube 3 of the second layer, a hook tool is used to hook out a portion of the required loose tube 3 of the second layer and then cut off to use the internal optical fiber 5. When the distance between the two skeleton segments 2 is insufficient to hook out the required loose tube 3 of the second layer, such as... Figure 11 Next, cut a notch 26 in the skeleton section 2 below the interface to widen the gap between the upper loose tubes 3. Then, use a hook tool to hook out a portion of the required loose tubes 3 of the second layer and cut it to use the internal optical fiber 5.

[0050] This application has the following beneficial effects: 1. It features a double-layered, loosely fitting tube with a larger number of fiber cores.

[0051] 2. When it is necessary to cut a notch 26 in skeleton segment 2 to access the second layer of loose sleeve, only one skeleton segment 2 needs to be destroyed. Moreover, skeleton segment 2 is independent. When cutting one skeleton segment 2, the adjacent skeleton segment 2 will not be cut, and the cutting is more convenient.

[0052] 3. In Example 2, the skeleton segment 2 can move to both sides, so that the skeleton segment 2 does not need to be damaged when the second layer of loose tube is taken, and it is more convenient to take the second layer of loose tube.

[0053] 4. In Example 3, gaps are formed on both the upper and lower sides of the skeleton segment 2 to arrange loose sleeves, making manufacturing more convenient.

[0054] 5. The skeleton segment 2 is not connected, which can reduce the use of material in the skeleton segment 2, save costs, reduce weight, and reduce the difficulty of laying when using air blowing.

[0055] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A double-layer easy-to-split optical cable, comprising an outer sheath (1) and a cable core, wherein the outer sheath (1) is extruded onto the outside of the cable core; characterized in that, The cable core includes a central reinforcing member (4) and a loose tube (3). The outer edge of the central reinforcing member (4) is uniformly provided with at least three first ridges (42) of the same height around the axis of the central reinforcing member (4). The first ridges (42) are parallel to the central reinforcing member (4). Each first ridge (42) is composed of multiple first ridge segments of the same number. The first ridge segments are distributed at intervals along the axial direction of the central reinforcing member (4). The central reinforcing member (4) is provided with the same number of loose tubes (3) as the first ridge (42). Each loose tube (3) passes through the interval between all the first ridge segments of the corresponding first ridge (42) in a wavy line. The central reinforcing member (4) is provided with a skeleton. The skeleton includes multiple skeleton segments (2) sleeved along the length direction of the central reinforcing member (4). Each skeleton segment (2) includes a skeleton segment body (21) and multiple second ridge segments (22). The second ridge segments (22) have the same height. All the second ridge segments (22) are uniformly fixed to the outer edge of the skeleton segment body (21) around the axis of the corresponding skeleton segment body (21). Projecting from left to right, the projections of the corresponding second edge segments (22) of all skeleton segments (2) completely overlap. The skeleton is provided with the same number of loose tubes (3) as the second edge segments (22) of a single skeleton segment (2). Each loose tube (3) passes through the interval between all the second edge segments (22) located on the same straight line in the form of a wavy line. At least one optical fiber (5) is provided in the loose tube (3).

2. The double-layer easy-to-split optical cable according to claim 1, characterized in that, The main body (21) of the skeleton segments of two adjacent skeleton segments (2) are connected.

3. The double-layer easy-to-split optical cable according to claim 1, characterized in that, The main body (21) of the skeleton segments (2) of two adjacent skeleton segments (2) are not connected, and the skeleton segment (2) can be pushed along the length direction of the central reinforcing member (4).

4. A double-layer easy-to-split optical cable according to any one of claims 1 to 3, characterized in that, From left to right, the nth first edge segment of each first edge (42) is equidistant from the leftmost end, n≥2.

5. A double-layer easy-to-split optical cable according to claim 4, characterized in that, The second edge segment (22) has the same number as the first edge segment (42). The second edge segment (22) and the first edge segment correspond one-to-one. When projected from left to right, the second edge segment (22) and the corresponding first edge segment are located on the same straight line.

6. A double-layer easy-to-split optical cable according to claim 5, characterized in that, The outer wall of the outer protective layer (1) is provided with multiple colored stripes of different colors for positioning the loose sleeve (3).

7. A double-layer easy-to-split optical cable, comprising an outer sheath (1) and a cable core, wherein the outer sheath (1) is extruded onto the outside of the cable core; characterized in that, The cable core includes a central reinforcing member (4) and a loose tube (3). The central reinforcing member (4) is provided with a skeleton. The skeleton includes multiple skeleton segments (2) sleeved along the length direction of the central reinforcing member (4). The skeleton segment (2) includes a skeleton segment body (21), at least three second edge segments (22) of the same height and at least three third edge segments (24) of the same height. All second edge segments (22) are uniformly fixed to the outer edge of the skeleton segment body (21) around the axis of the skeleton segment body (21). All third edge segments (24) are uniformly fixed to the inner edge of the skeleton segment body (21) around the axis of the skeleton segment body (21). The skeleton body (21) of two adjacent skeleton segments (2) are not connected. When projected from left to right, the projections of the corresponding second edge segments (22) of all skeleton segments (2) completely overlap. The upper side of the skeleton body (21) is provided with the same number of loose tubes (3) as the second edge segments (22) of a single skeleton segment (2). Each loose tube (3) passes through the gap between all the second edge segments (22) located on the same straight line in the form of a wavy line. The lower side of the skeleton body (21) is provided with the same number of loose tubes (3) as the third edge segments (24) of a single skeleton segment (2). Each loose tube (3) passes through the gap between all the third edge segments (24) located on the same straight line in the form of a wavy line. At least one optical fiber (5) is provided inside the loose tube (3).

8. A double-layer easy-to-split optical cable according to claim 7, characterized in that, The third edge segment (24) and the second edge segment (22) correspond one-to-one. When projected from left to right, the third edge segment (24) and the corresponding second edge segment (22) are located on the same straight line.

9. A double-layer easy-to-split optical cable according to claim 8, characterized in that, The outer edge of the central reinforcement (4) is provided with the same number of slots as the skeleton segment (2). Each slot group includes a number of fixing slots (44) that are uniformly arranged around the axis of the central reinforcement (4) as the number of the third ridge segment (24) of the skeleton segment (2). The third ridge segment (24) is inserted into the corresponding fixing slot (44).

10. A double-layer easy-to-split optical cable according to claim 9, characterized in that, The outer wall of the outer protective layer (1) is provided with multiple colored stripes of different colors for positioning the loose sleeve (3).

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