Multi-layer easily-pulled-out-and-connected fiber-core-intensive optical cable

Abstract

The invention belongs to the technical field of optical fibers and cables, and particularly discloses a multi-layer easily-pulled-out fiber-core-intensive optical cable which comprises an outer protective layer, a plurality of layers of inner wall cavity sets are arranged in the outer protective layer from top to bottom in a layered mode, and each inner wall cavity set comprises a plurality of gear-shaped inner wall cavities arranged side by side from left to right. Each gear-shaped inner wall cavity comprises a microtubule optical unit and an optical fiber unit, each gear-shaped inner wall cavity comprises convex teeth and concave teeth, the convex teeth and the concave teeth are connected at intervals to form a ring shape, and a clinging seam structure is arranged between every two adjacent gear-shaped inner wall cavities of the same layer of inner wall cavity group. The two ends of the clinging seam structure are respectively connected with the two corresponding gear-shaped inner wall cavities; the optical fiber has the beneficial effects that the structure is compact, the fiber cores are dense, the micro-tube optical units are convenient to take out and connect, the micro-tube optical units are convenient to extract, and the micro-tube optical units are convenient to strip.

Description

Technical Field

[0001] This invention belongs to the field of optical fiber and cable technology, and in particular discloses a multi-layer easy-to-split dense fiber core optical cable. Background Technology

[0002] In recent years, easy-to-split optical cables have gained increasing popularity in the market and are being widely deployed in street-front shops and buildings. Easy-to-split optical cables offer unique advantages, maximizing space utilization even with limited installation space. Furthermore, their unique usage and structural features significantly improve construction efficiency. Their application can substantially enhance coverage construction and service activation efficiency, playing a positive role in promoting operators' 5G digital application projects, while simultaneously saving on investment in deep market coverage and reducing labor costs.

[0003] Currently available slotted optical cables generally have relatively empty internal spaces, with the micro-cluster optical units arranged randomly and irregularly, resulting in low overall space utilization and limited fiber density. Secondly, extracting these micro-cluster optical units is laborious, as multiple units are intertwined and irregularly arranged, requiring the selection of a single unit, which is inconvenient. Furthermore, current slotted optical cables require a stripping tool to create a relatively large window on the cable surface, causing significant structural damage and exposing almost all micro-cluster optical units, increasing the risk of damage to other units. Summary of the Invention

[0004] The purpose of this invention is to solve the above-mentioned problems by providing a multi-layer easy-splitting fiber core dense optical cable, which can not only neatly arrange the optical units inside the cable and carry higher fiber density, but also quickly find the target optical unit for smooth splicing; finally, due to the special structure, the risk of damage to other optical units can be minimized during the process of stripping the optical cable. It is achieved by the following technical solution.

[0005] A multi-layer easy-to-split fiber core dense optical cable includes an outer sheath, and the inner sheath is provided with multiple inner wall cavity groups from top to bottom. The inner wall cavity group includes multiple gear-shaped inner wall cavities arranged side by side from left to right. The gear-shaped inner wall cavity encompasses the microtube optical unit and the optical fiber unit. The optical fiber unit is located inside the microtube optical unit. The gear-shaped inner wall cavity includes convex teeth and concave teeth, which are connected in a ring at intervals. Compared with a pure circular contact surface, the design of convex teeth and concave teeth reduces the contact area by nearly 50% to 60%. This reduces the contact between the microtube optical unit and the inner wall of the cavity, resulting in less friction and further optimizing the removable function of the optical cable. A tight-fitting seam structure is provided between two adjacent gear-shaped inner wall cavities in the same inner wall cavity group, and the two ends of the tight-fitting seam structure are respectively connected to the two corresponding gear-shaped inner wall cavities.

[0006] The aforementioned multi-layer easy-to-split fiber core dense optical cable has a cutout on the outer edge of the outer sheath at both ends of the left and right sides of each inner wall cavity assembly.

[0007] The aforementioned multi-layer easy-to-split fiber core dense optical cable has a stripping unit at the left and right ends of each inner wall cavity group. The stripping unit includes an inlet slit microcavity and a tight-fitting seam structure. One end of the tight-fitting seam structure is connected to the corresponding inlet slit microcavity, and the other end of the tight-fitting seam structure is connected to the adjacent gear-shaped inner wall cavity.

[0008] The aforementioned multi-layer easy-to-split fiber core dense optical cable has an introduced cut-out micro-cavity that presents a "zigzag shape".

[0009] The aforementioned multi-layer easy-to-split dense fiber core optical cable features a tightly fitted sheath layer on both sides of the seam structure, which is a non-adhesive structure. The micro-cavity of the cut serves to accommodate the cut and act as a buffer, preventing the cut from damaging the microtube optical unit when the blade is stripped. At the same time, it facilitates the blade to strip to the corresponding seam structure.

[0010] The aforementioned multi-layer easy-to-split fiber core dense optical cable has a distance of 1~3mm between two gear-shaped inner wall cavities. In order to avoid wasting space and maximize the utilization of fiber density carrying capacity, the adjacent two gear-shaped inner wall cavities of the same layer are arranged in a meshing manner of convex and concave teeth.

[0011] The aforementioned multi-layer easy-to-split fiber core dense optical cable has an outer sheath composed of multiple layers of sheaths tightly stacked from top to bottom. In two adjacent layers of sheaths, the lower edge of the upper layer of sheath is provided with multiple semi-circular cavity walls, and the upper edge of the lower layer of sheath is provided with multiple semi-circular cavity walls accordingly. The lower edge between adjacent semicircular cavity walls of the upper layer sheath is a serrated edge. The lower edge of the leftmost semicircular cavity wall of the upper layer sheath is a serrated edge to the right. The lower edge of the rightmost semicircular cavity wall of the upper layer sheath is a serrated edge to the left. The upper edge between adjacent semicircular cavity walls of the upper edge of the lower layer sheath is a serrated edge. The upper edge of the leftmost semicircular cavity wall of the upper edge of the lower layer sheath is a serrated edge to the right. The upper edge of the rightmost semicircular cavity wall of the upper edge of the lower layer sheath is a serrated edge to the left. There is a micro-groove on the left side of the leftmost serrated edge of the lower edge of the upper layer sheath, and a micro-groove on the right side of the rightmost serrated edge of the upper edge of the lower layer sheath. The semi-circular cavity wall at the lower edge of the corresponding upper layer sheath and the semi-circular cavity wall at the upper edge of the corresponding lower layer sheath combine to form a gear-shaped inner cavity. The micro-groove at the lower edge of the corresponding upper layer sheath and the micro-groove at the upper edge of the corresponding lower layer sheath combine to form an inlet micro-cavity. The lower edge of the upper layer sheath on the left side of the inlet micro-cavity on the left side is bonded to the upper edge of the lower layer sheath, and the lower edge of the upper layer sheath on the right side of the inlet micro-cavity on the right side is bonded to the upper edge of the lower layer sheath.

[0012] The aforementioned multi-layer easy-to-split fiber-core dense optical cable has an outer sheath made of thermoplastic material and an overall shape that is approximately circular, protecting the reinforcing members, optical fibers, and other components within the cable.

[0013] The aforementioned multi-layer easy-to-split fiber core dense optical cable has a non-metallic reinforcing member inside the outer sheath on the uppermost inner wall cavity assembly and inside the outer sheath on the lowermost inner wall cavity assembly.

[0014] The aforementioned multi-layer easy-to-split fiber-core dense optical cable uses non-metallic reinforcing elements made of GFRP, KFRP, twisted glass yarn, or twisted aramid fiber. Different reinforcing elements can be selected according to the customer's required tensile strength and the optical cable's bending radius.

[0015] Compared with the prior art, the present invention has the following advantages: (1) Each layer of microtube optical unit in this invention is independent of each other. When it is necessary to cut out the microtube optical unit, it is only necessary to know which layer the microtube optical unit to be cut out is located on and which cut is closer to it. The outer protective layer is broken to a certain length at the cut where it is to be cut out, so that the required microtube optical unit can be cut out for construction. It is convenient and quick, and no special tools are required.

[0016] (2) This invention truly utilizes the space in the optical cable to achieve a tight arrangement of each microtube optical unit, which can realize a dense fiber core optical cable without increasing the outer diameter of the optical cable, thereby improving the signal carrying capacity of the optical cable. (3) The present invention also makes it easier to extract the microtube optical unit. Due to the design of the gear-shaped inner wall cavity, the contact area between the microtube optical unit and the sheath is small during the construction and extraction process. This results in less resistance and less friction between them, improving the extraction efficiency, making it more convenient for operators and providing a better experience.

[0017] (4) The present invention designs each microtube optical unit to have its own independent cavity space, so as to achieve "one tube in one room", avoiding the intricate entanglement between microtube optical units, which is inconvenient to select and requires careful identification and extraction, thus affecting construction efficiency.

[0018] (5) The present invention minimizes the impact on other unwanted microtube optical units during the peeling and extraction of microtube optical units, thus protecting them from peeling and exposure and avoiding unnecessary risks.

[0019] (6) The present invention has a stripping opening in each layer of microtube optical unit. The stripping opening can be selected for whichever layer of microtube optical unit needs to be stripped, which is convenient and quick.

[0020] (7) The present invention has designed a certain safety space for the peeling depth in each peeling opening to avoid excessive force of the peeling knife, peeling too deeply, and damaging the microtube optical unit.

[0021] In summary, compared with traditional easy-to-split optical cables, this invention has the following main advantages: First, the microtube optical units are easy to splice without the need for special cutting tools; second, the fiber density is high, enabling a large core count in the optical cable, as the microtube optical units are designed to be tightly arranged layer by layer, maximizing the use of space within the optical cable; third, the microtube optical units are easy to extract, with a smaller contact area between the microtube optical units and the inner wall of the sheath cavity, resulting in less friction and facilitating extraction; fourth, each microtube optical unit has its own independent cavity space, eliminating the possibility of entanglement with other microtube optical units, making splicing easier and not affecting other microtube optical units; fifth, stripping is performed as needed, minimizing impact on other microtube optical units, which are still protected by the sheath material; sixth, the stripping cut and stripping unit work together to quickly and conveniently extract the microtube optical units. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of Embodiment 1 of the present invention.

[0023] Figure 2 This is a detailed view of the adjacent gear-shaped inner wall cavity in Embodiment 1 of the present invention.

[0024] Figure 3 This is a detailed view of the gear-shaped inner wall cavity body of Embodiment 1 of the present invention.

[0025] Figure 4 This is a detailed view of the peeling unit in Embodiment 1 of the present invention.

[0026] Figure 5 This is a cross-sectional view of the first layer of the sleeve in Embodiment 2 of the present invention.

[0027] Figure 6 This is a cross-sectional view of the second layer of the sleeve in Embodiment 2 of the present invention.

[0028] Figure 7 This is a cross-sectional view of the third layer of the sleeve in Embodiment 2 of the present invention.

[0029] Figure 8 This is a cross-sectional view of the fourth layer of the sleeve in Embodiment 2 of the present invention.

[0030] Figure 9 This is a cross-sectional view of the fifth layer of the sleeve in Embodiment 2 of the present invention.

[0031] Figure 10 This is a cross-sectional view of the sixth layer of the sleeve in Embodiment 2 of the present invention.

[0032] In the diagram: 1. Outer sheath, 11. First layer, 12. Second layer, 13. Third layer, 14. Fourth layer, 15. Fifth layer, 16. Sixth layer, 2. Non-metallic reinforcement, 3. Gear-shaped inner wall cavity, 301. Convex tooth, 302. Concave tooth, 303. Semi-circular cavity wall, 4. Peeling unit, 401. Introducing incision microcavity, 402. Seam structure, 4011. Incision microgroove, 5. Incision, 6. Microtube optical unit, 7. Fiber optic unit. Detailed Implementation

[0033] Example 1: As Figure 1 As shown, a multi-layer easy-to-split fiber-core dense optical cable includes an outer sheath 1. The outer sheath 1 has multiple inner wall cavity groups arranged from top to bottom. Each inner wall cavity group includes multiple gear-shaped inner wall cavities 3 arranged side by side from left to right. Each outer sheath 1 at both ends of each inner wall cavity group has a cutout 5. The outer sheath 1 is made of low-smoke halogen-free material or other thermoplastic material, and its overall shape is approximately circular, protecting the reinforcing members, optical fibers, and other components in the optical cable. There is a non-metallic reinforcing member 2 in the outer sheath 1 on the uppermost inner wall cavity group and in the outer sheath 1 on the lowermost inner wall cavity group. The non-metallic material can be various, such as GFRP, KFRP, twisted glass yarn, twisted aramid, etc. Different reinforcing members can be selected according to the customer's required tensile strength and the bending radius requirements of the optical cable.

[0034] like Figure 3 As shown, the gear-shaped inner wall cavity 3 encompasses the microtube optical unit 6 and the optical fiber unit 7. The optical fiber unit 7 is located inside the microtube optical unit 6. The gear-shaped inner wall cavity 3 includes convex teeth 301 and concave teeth 302, which are connected in a ring at intervals. Compared with a pure circular contact surface, the design of convex teeth 301 and concave teeth 302 reduces the contact area by nearly 50% to 60%. This reduces the contact between the microtube optical unit 6 and the inner wall of the cavity, resulting in less friction and further optimizing the removable function of the optical cable.

[0035] like Figure 2As shown, the distance between the two gear-shaped inner wall cavities is 1~3mm. In order to avoid wasting space and maximize the utilization of fiber density carrying capacity, the two adjacent gear-shaped inner wall cavities 3 in the same layer are arranged in a meshing manner with convex teeth 301 and concave teeth 302.

[0036] like Figure 4 As shown, each inner wall cavity group has a peeling unit 4 at its left and right ends. The peeling unit 4 includes an inlet microcavity 401 and a tight-fitting seam structure 402. The inlet microcavity 401 is zigzag-shaped. The sheath layers 1 on the upper and lower sides of the tight-fitting seam structure 402 are tightly fitted and non-adhesive. One end of the tight-fitting seam structure 402 is connected to the corresponding inlet microcavity 401, and the other end of the tight-fitting seam structure 402 is connected to the adjacent gear-shaped inner wall cavity 3. The function of the inlet microcavity 401 is to correspond to and accommodate the incision 5, and to act as a buffer to prevent the incision 5 from damaging the microtube optical unit when the tool peels it. At the same time, it can facilitate the blade to peel to the corresponding tight-fitting seam structure 402. A tight-fitting seam structure 402 is also provided between two adjacent gear-shaped inner wall cavities 3 in the same inner wall cavity group. The two ends of the tight-fitting seam structure 402 are respectively connected to the two corresponding gear-shaped inner wall cavities 3.

[0037] Example 2: As Figures 5 to 10 and refer to Figures 1 to 4 A multi-layer easy-to-split fiber core dense optical cable, this embodiment is basically the same as embodiment 1, the difference is that the outer sheath 1 is composed of a first layer 11, a second layer 12, a third layer 13, a fourth layer 14, a fifth layer 15 and a sixth layer 16 from top to bottom. The lower edge of the first sleeve 11 is provided with three downward-facing semi-circular cavity walls 303 at intervals. The lower edge of the first sleeve 11 between two adjacent semi-circular cavity walls 303 is a serrated edge. The right side of the lower edge of the first sleeve 11 on the left side of the leftmost semi-circular cavity wall 303 is a serrated edge. A micro-groove 4011 is connected to the left side of the leftmost serrated edge. The left side of the lower edge of the first sleeve 11 on the right side of the rightmost semi-circular cavity wall 303 is a serrated edge. A micro-groove 4011 is connected to the right side of the rightmost serrated edge. A non-metallic reinforcing member 2 is provided inside the upper side of the first sleeve 11.

[0038] The lower edge of the second sleeve 12 is provided with four downward-facing semicircular cavity walls 303. The lower edge of the second sleeve 12 between two adjacent semicircular cavity walls 303 is a serrated edge. The right side of the lower edge of the leftmost semicircular cavity wall 303 of the lower edge of the second sleeve 12 is a serrated edge. A cutting micro-groove 4011 is connected to the left side of the leftmost serrated edge of the lower edge of the second sleeve 12. The left side of the lower edge of the rightmost semicircular cavity wall 303 of the lower edge of the second sleeve 12 is a serrated edge. A cutting micro-groove 4011 is connected to the right side of the rightmost serrated edge of the lower edge of the second sleeve 12. The upper edge of the second sleeve 12 is provided with three upward-facing semi-circular cavity walls 303 spaced apart. The upper edge of the second sleeve 12 between two adjacent semi-circular cavity walls 303 is a serrated edge. The right side of the upper edge of the leftmost semi-circular cavity wall 303 on the upper edge of the second sleeve 12 is a serrated edge. A micro-groove 4011 is connected to the left side of the leftmost serrated edge of the upper edge of the second sleeve 12. The left side of the upper edge of the rightmost semi-circular cavity wall 303 on the upper edge of the second sleeve 12 is a serrated edge. A micro-groove 4011 is connected to the right side of the rightmost serrated edge of the upper edge of the second sleeve 12.

[0039] The lower edge of the third sleeve 13 is provided with five downward-facing semicircular cavity walls 303 at intervals. The lower edge of the third sleeve 13 between two adjacent semicircular cavity walls 303 is a serrated edge. The right side of the lower edge of the leftmost semicircular cavity wall 303 of the lower edge of the third sleeve 13 is a serrated edge. A micro-groove 4011 is connected to the left side of the leftmost serrated edge of the lower edge of the third sleeve 13. The left side of the lower edge of the rightmost semicircular cavity wall 303 of the lower edge of the third sleeve 13 is a serrated edge. A micro-groove 4011 is connected to the right side of the rightmost serrated edge of the lower edge of the third sleeve 13. The upper edge of the third sleeve 13 is provided with four upward-facing semi-circular cavity walls 303. The upper edge of the third sleeve 13 between two adjacent semi-circular cavity walls 303 is a serrated edge. The right side of the upper edge of the leftmost semi-circular cavity wall 303 on the upper edge of the third sleeve 13 is a serrated edge. A micro-groove 4011 is connected to the left side of the leftmost serrated edge of the upper edge of the third sleeve 13. The left side of the upper edge of the rightmost semi-circular cavity wall 303 on the upper edge of the third sleeve 13 is a serrated edge. A micro-groove 4011 is connected to the right side of the rightmost serrated edge of the upper edge of the third sleeve 13.

[0040] The lower edge of the fourth layer sleeve 14 is provided with four downward-facing semi-circular cavity walls 303. The lower edge of the fourth layer sleeve 14 between two adjacent semi-circular cavity walls 303 is a serrated edge. The right side of the lower edge of the leftmost semi-circular cavity wall 303 of the lower edge of the fourth layer sleeve 14 is a serrated edge. A cutting micro-groove 4011 is connected to the left side of the leftmost serrated edge of the lower edge of the fourth layer sleeve 14. The left side of the lower edge of the rightmost semi-circular cavity wall 303 of the lower edge of the fourth layer sleeve 14 is a serrated edge. A cutting micro-groove 4011 is connected to the right side of the rightmost serrated edge of the lower edge of the fourth layer sleeve 14. The upper edge of the fourth sleeve 14 is provided with five upward-facing semicircular cavity walls 303 spaced apart. The upper edge of the fourth sleeve 14 between two adjacent semicircular cavity walls 303 is a serrated edge. The right side of the upper edge of the leftmost semicircular cavity wall 303 on the upper edge of the fourth sleeve 14 is a serrated edge. A micro-groove 4011 is connected to the left side of the leftmost serrated edge of the upper edge of the fourth sleeve 14. The left side of the upper edge of the rightmost semicircular cavity wall 303 on the upper edge of the fourth sleeve 14 is a serrated edge. A micro-groove 4011 is connected to the right side of the rightmost serrated edge of the upper edge of the fourth sleeve 14.

[0041] The lower edge of the fifth layer 15 is provided with three downward-facing semi-circular cavity walls 303 at intervals. The lower edge of the fifth layer 15 between two adjacent semi-circular cavity walls 303 is a serrated edge. The right side of the lower edge of the leftmost semi-circular cavity wall 303 of the lower edge of the fifth layer 15 is a serrated edge. A cutting micro-groove 4011 is connected to the left side of the leftmost serrated edge of the lower edge of the fifth layer 15. The left side of the lower edge of the rightmost semi-circular cavity wall 303 of the lower edge of the fifth layer 15 is a serrated edge. A cutting micro-groove 4011 is connected to the right side of the rightmost serrated edge of the lower edge of the fifth layer 15. The upper edge of the fifth layer 15 is provided with four upward-facing semi-circular cavity walls 303. The upper edge of the fifth layer 15 between two adjacent semi-circular cavity walls 303 is a serrated edge. The right side of the upper edge of the leftmost semi-circular cavity wall 303 on the upper edge of the fifth layer 15 is a serrated edge. A micro-groove 4011 is connected to the left side of the leftmost serrated edge of the upper edge of the fifth layer 15. The left side of the upper edge of the rightmost semi-circular cavity wall 303 on the upper edge of the fifth layer 15 is a serrated edge. A micro-groove 4011 is connected to the right side of the rightmost serrated edge of the upper edge of the fifth layer 15.

[0042] The upper edge of the sixth layer sleeve 16 is provided with three upward-facing semi-circular cavity walls 303. The upper edge of the sixth layer sleeve 16 between two adjacent semi-circular cavity walls 303 is a serrated edge. The right side of the upper edge of the sixth layer sleeve 16 on the left side of the leftmost semi-circular cavity wall 303 is a serrated edge. A micro-groove 4011 is connected to the left side of the leftmost serrated edge. The left side of the upper edge of the sixth layer sleeve 16 on the right side of the rightmost semi-circular cavity wall 303 is a serrated edge. A micro-groove 4011 is connected to the right side of the rightmost serrated edge. A non-metallic reinforcing member 2 is provided inside the lower side of the sixth layer sleeve 16.

[0043] The serrated edge of the lower edge of the first sleeve 11 and the corresponding serrated edge of the upper edge of the second sleeve 12 are tightly engaged to form a seam-fitting structure 402. The semi-circular cavity wall 303 on the lower side of the first sleeve 11 and the corresponding semi-circular cavity wall 303 on the upper side of the second sleeve 12 are combined to form a gear-shaped inner wall cavity 3. The micro-groove 4011 on the lower side of the first sleeve 11 and the corresponding micro-groove 4011 on the upper side of the second sleeve 12 are combined to form an inlet micro-cavity 401. The lower edge of the first sleeve 11 on the left side of the left inlet micro-cavity 401 and the upper edge of the second sleeve 12 on the left side of the left inlet micro-cavity 401 are bonded together, and a cut 5 is provided on the left side of the bonding point. The lower edge of the first sleeve 11 on the right side of the right inlet micro-cavity 401 and the upper edge of the second sleeve 12 on the right side of the right inlet micro-cavity 401 are bonded together, and a cut 5 is provided on the right side of the bonding point.

[0044] The serrated edge of the lower edge of the second sleeve 12 and the corresponding serrated edge of the upper edge of the third sleeve 13 are tightly engaged to form a seam structure 402. The semi-circular cavity wall 303 on the lower side of the second sleeve 12 and the corresponding semi-circular cavity wall 303 on the upper side of the third sleeve 13 are combined to form a gear-shaped inner wall cavity 3. The micro-groove 4011 on the lower side of the second sleeve 12 and the corresponding micro-groove 4011 on the upper side of the third sleeve 13 are combined to form an inlet micro-cavity 401. The lower edge of the second sleeve 12 on the left side of the left inlet micro-cavity 401 and the upper edge of the third sleeve 13 on the left side of the left inlet micro-cavity 401 are bonded together, and a cut 5 is provided on the left side of the bonding point. The lower edge of the second sleeve 12 on the right side of the right inlet micro-cavity 401 and the upper edge of the third sleeve 13 on the right side of the right inlet micro-cavity 401 are bonded together, and a cut 5 is provided on the right side of the bonding point.

[0045] The serrated edge of the lower edge of the third sleeve 13 and the corresponding serrated edge of the upper edge of the fourth sleeve 14 are tightly engaged to form a seam structure 402. The semi-circular cavity wall 303 on the lower side of the third sleeve 13 and the corresponding semi-circular cavity wall 303 on the upper side of the fourth sleeve 14 are combined to form a gear-shaped inner wall cavity 3. The micro-groove 4011 on the lower side of the third sleeve 13 and the corresponding micro-groove 4011 on the upper side of the fourth sleeve 14 are combined to form an inlet micro-cavity 401. The lower edge of the third sleeve 13 on the left side of the left inlet micro-cavity 401 and the upper edge of the fourth sleeve 14 on the left side of the left inlet micro-cavity 401 are bonded together, and a cut 5 is provided on the left side of the bonding point. The lower edge of the third sleeve 13 on the right side of the right inlet micro-cavity 401 and the upper edge of the fourth sleeve 14 on the right side of the right inlet micro-cavity 401 are bonded together, and a cut 5 is provided on the right side of the bonding point.

[0046] The serrated edge of the lower edge of the fourth layer 14 and the corresponding serrated edge of the upper edge of the fifth layer 15 are tightly engaged to form a seam structure 402. The semi-circular cavity wall 303 on the lower side of the fourth layer 14 and the corresponding semi-circular cavity wall 303 on the upper side of the fifth layer 15 are combined to form a gear-shaped inner wall cavity 3. The micro-groove 4011 on the lower side of the fourth layer 14 and the corresponding micro-groove 4011 on the upper side of the fifth layer 15 are combined to form an inlet micro-cavity 401. The lower edge of the fourth layer 14 on the left side of the left inlet micro-cavity 401 and the upper edge of the fifth layer 15 on the left side of the left inlet micro-cavity 401 are bonded together, and a cut 5 is provided on the left side of the bonding point. The lower edge of the fourth layer 14 on the right side of the right inlet micro-cavity 401 and the upper edge of the fifth layer 15 on the right side of the right inlet micro-cavity 401 are bonded together, and a cut 5 is provided on the right side of the bonding point.

[0047] The serrated edge of the lower edge of the fifth layer 15 and the corresponding serrated edge of the upper edge of the sixth layer 16 are tightly engaged to form a seam structure 402. The semi-circular cavity wall 303 on the lower side of the fifth layer 15 and the corresponding semi-circular cavity wall 303 on the upper side of the sixth layer 16 are combined to form a gear-shaped inner wall cavity 3. The micro-groove 4011 on the lower side of the fifth layer 15 and the corresponding micro-groove 4011 on the upper side of the sixth layer 16 are combined to form an inlet micro-cavity 401. The lower edge of the fifth layer 15 on the left side of the left inlet micro-cavity 401 and the upper edge of the sixth layer 16 on the left side of the left inlet micro-cavity 401 are bonded together, and a cut 5 is provided on the left side of the bonding point. The lower edge of the fifth layer 15 on the right side of the right inlet micro-cavity 401 and the upper edge of the sixth layer 16 on the right side of the right inlet micro-cavity 401 are bonded together, and a cut 5 is provided on the right side of the bonding point.

[0048] Example 3: A method for manufacturing a multi-layer easy-to-split dense fiber core optical cable as described in Example 2, comprising the following steps: Step 01: Coloring. Apply different colored inks to the outside of different fiber units 7 and cure them. Step 02: Two sets of microtubes are extruded on the outside of multiple optical fiber units 7 to form microtube optical units 6; Step 03: Extrude the first layer 11 onto the non-metallic reinforcing part 2 using an extruder; Step 04: Extrude the second sleeve 12, the third sleeve 13, the fourth sleeve 14 and the fifth sleeve 15 respectively using an extruder; Step 05: Extrude the sixth layer 16 onto the non-metallic reinforcing part 2 using an extruder; Step 06: Apply adhesive to the upper left and upper right edges of the microgrooves 4011 on the upper side of the second layer sleeve 12, the third layer sleeve 13, the fourth layer sleeve 14, and the fifth layer sleeve 15. At the same time, apply adhesive to the lower left and lower right edges of the microgrooves 4011 on the lower side of the second layer sleeve 12, the third layer sleeve 13, the fourth layer sleeve 14, and the fifth layer sleeve 15. Stack the first layer sleeve 11, the second layer sleeve 12, the third layer sleeve 13, the fourth layer sleeve 14, the fifth layer sleeve 15, and the sixth layer sleeve 16 from top to bottom, with the corresponding serrated edges interlocking. Then, use a shaping mold to bond and fix the first layer sleeve 11, the second layer sleeve 12, the third layer sleeve 13, the fourth layer sleeve 14, the fifth layer sleeve 15, and the sixth layer sleeve 16 in sequence to form the outer protective layer 1. Multiple gear-shaped inner wall cavities 3 are formed inside the outer protective layer 1. Step 07: The microtube optical unit 6 is blown into the corresponding gear-shaped inner wall cavity 3 by air blowing process.

[0049] Compared with the prior art, the present invention has the following advantages: (1) Each layer of microtube optical unit in this invention is independent of each other. When it is necessary to cut out the microtube optical unit, it is only necessary to know which layer the microtube optical unit to be cut out is located on and which cut is closer to it. The outer protective layer is broken to a certain length at the cut where it is to be cut out, so that the required microtube optical unit can be cut out for construction. It is convenient and quick, and no special tools are required.

[0050] (2) This invention truly utilizes the space in the optical cable to achieve a tight arrangement of each microtube optical unit, which can realize a dense fiber core optical cable without increasing the outer diameter of the optical cable, thereby improving the signal carrying capacity of the optical cable. (3) The present invention also makes it easier to extract the microtube optical unit. Due to the design of the gear-shaped inner wall cavity, the contact area between the microtube optical unit and the sheath is small during the construction and extraction process. This results in less resistance and less friction between them, improving the extraction efficiency, making it more convenient for operators and providing a better experience.

[0051] (4) The present invention designs each microtube optical unit to have its own independent cavity space, so as to achieve "one tube in one room", avoiding the intricate entanglement between microtube optical units, which is inconvenient to select and requires careful identification and extraction, thus affecting construction efficiency.

[0052] (5) The present invention minimizes the impact on other unwanted microtube optical units during the peeling and extraction of microtube optical units, thus protecting them from peeling and exposure and avoiding unnecessary risks.

[0053] (6) The present invention has a stripping opening in each layer of microtube optical unit. The stripping opening can be selected for whichever layer of microtube optical unit needs to be stripped, which is convenient and quick.

[0054] (7) The present invention has designed a certain safety space for the peeling depth in each peeling opening to avoid excessive force of the peeling knife, peeling too deeply, and damaging the microtube optical unit.

[0055] In summary, compared with traditional easy-to-split optical cables, this invention has the following main advantages: First, the microtube optical units are easy to splice without the need for special cutting tools; second, the fiber density is high, enabling a large core count in the optical cable, as the microtube optical units are designed to be tightly arranged layer by layer, maximizing the use of space within the optical cable; third, the microtube optical units are easy to extract, with a smaller contact area between the microtube optical units and the inner wall of the sheath cavity, resulting in less friction and facilitating extraction; fourth, each microtube optical unit has its own independent cavity space, eliminating the possibility of entanglement with other microtube optical units, making splicing easier and not affecting other microtube optical units; fifth, stripping is performed as needed, minimizing impact on other microtube optical units, which are still protected by the sheath material; sixth, the stripping cut and stripping unit work together to quickly and conveniently extract the microtube optical units.

[0056] This invention is not limited to the above-described embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of this invention shall be considered equivalent substitutions and shall be included within the scope of protection of this invention.

Claims

1. A multi-layer easy-to-split fiber-core dense optical cable, comprising an outer sheath (1), characterized in that, The outer protective layer (1) has multiple layers of inner wall cavities arranged from top to bottom. The inner wall cavity group includes multiple gear-shaped inner wall cavities (3) arranged side by side from left to right. The gear-shaped inner wall cavity (3) encompasses the microtube optical unit (6) and the optical fiber unit (7). The optical fiber unit (7) is located inside the microtube optical unit (6). The gear-shaped inner wall cavity (3) includes convex teeth (301) and concave teeth (302). The convex teeth (301) and concave teeth (302) are connected in a ring at intervals. A tight-fitting seam structure (402) is provided between two adjacent gear-shaped inner wall cavities (3) in the same inner wall cavity group. The two ends of the tight-fitting seam structure (402) are respectively connected to the two corresponding gear-shaped inner wall cavities (3).

2. The multi-layer easy-to-split fiber core dense optical cable according to claim 1, characterized in that, Each inner wall cavity group has a cut (5) on the outer edge of the outer protective layer (1) at both ends of the left and right sides.

3. A multi-layer easy-to-split dense fiber core optical cable according to claim 2, characterized in that, Each inner wall cavity group has a peeling unit (4) at its left and right ends. The peeling unit (4) includes an inlet microcavity (401) and a close-fitting seam structure (402). One end of the close-fitting seam structure (402) is connected to the corresponding inlet microcavity (401), and the other end of the close-fitting seam structure (402) is connected to the adjacent gear-shaped inner wall cavity (3).

4. A multi-layer easy-to-split fiber-core dense optical cable according to claim 3, characterized in that, The introduced incision microcavity (401) is in the shape of a broken line.

5. A multi-layer easy-to-split fiber-core dense optical cable according to claim 4, characterized in that, The sheath layers (1) on both sides of the close-fitting seam structure (402) are tightly fitted.

6. A multi-layer easy-to-split fiber-core dense optical cable according to claim 5, characterized in that, The two adjacent gear-shaped inner wall cavities (3) of the same layer are arranged in a meshing manner with convex teeth (301) and concave teeth (302).

7. A multi-layer easy-to-split fiber-core dense optical cable according to claim 6, characterized in that, The outer sheath (1) is composed of multiple layers of sheaths tightly stacked from top to bottom. In two adjacent layers of sheaths, the lower edge of the upper layer of sheath is provided with multiple semi-circular cavity walls (303), and the upper edge of the lower layer of sheath is provided with multiple semi-circular cavity walls (303) respectively. The lower edge between adjacent semi-circular cavity walls (303) of the lower edge of the upper layer of sheath is a serrated edge. The lower edge of the left side of the leftmost semi-circular cavity wall (303) of the lower edge of the upper layer of sheath is a serrated edge. The lower edge of the right side of the rightmost semi-circular cavity wall (303) of the lower edge of the upper layer of sheath is a serrated edge. The upper edge between adjacent semi-circular cavity walls (303) of the upper edge of the lower layer of sheath is a serrated edge. The upper left side of the leftmost semicircular cavity wall (303) of the upper edge of the lower layer sheath is a serrated edge, and the upper right side of the rightmost semicircular cavity wall (303) of the upper edge of the lower layer sheath is a serrated edge; a cut micro-groove (4011) is connected to the left side of the leftmost serrated edge of the lower edge of the upper layer sheath, a cut micro-groove (4011) is connected to the left side of the leftmost serrated edge of the upper edge of the lower layer sheath, a cut micro-groove (4011) is connected to the right side of the rightmost serrated edge of the lower edge of the upper layer sheath, and a cut micro-groove (4011) is connected to the right side of the rightmost serrated edge of the upper edge of the lower layer sheath. The semi-circular cavity wall (303) at the lower edge of the corresponding upper layer sheath and the semi-circular cavity wall (303) at the upper edge of the corresponding lower layer sheath are combined to form a gear-shaped inner wall cavity (3). The micro-groove (4011) at the lower edge of the corresponding upper layer sheath and the micro-groove (4011) at the upper edge of the corresponding lower layer sheath are combined to form an inlet micro-cavity (401). The lower edge of the upper layer sheath on the left side and the upper edge of the lower layer sheath on the left side of the inlet micro-cavity (401) are bonded together. The lower edge of the upper layer sheath on the right side and the upper edge of the lower layer sheath on the right side of the inlet micro-cavity (401) are bonded together.

8. A multi-layer easy-to-split fiber-core dense optical cable according to claim 7, characterized in that, The outer protective layer (1) is made of thermoplastic material.

9. A multi-layer easy-to-split fiber-core dense optical cable according to claim 8, characterized in that, There is a non-metallic reinforcing member (2) in the outer protective layer (1) on the uppermost inner wall cavity assembly and in the outer protective layer (1) on the lowermost inner wall cavity assembly.

10. A multi-layer easy-to-split dense fiber core optical cable according to claim 9, characterized in that, The non-metallic reinforcing member (2) is GFRP or KFRP or twisted glass yarn or twisted aramid.

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