Drop-shaped optical cable and manufacturing method thereof

Abstract

The invention relates to a water-drop-shaped optical cable and a manufacturing method thereof, and relates to the field of optical cable manufacturing, the water-drop-shaped optical cable comprises an outer sheath, an optical fiber unit, a plurality of reinforcing cores and a plurality of waterproof layers, the optical fiber unit is composed of a plurality of optical fiber bundles distributed in a central symmetry mode, and the reinforcing cores are arranged on the two sides of the optical fiber unit in parallel in the length direction of the optical cable; the optical fiber unit and the reinforcing cores are respectively coated with the water-blocking layers, the water-blocking layers are coated with the outer sheath, the top of the cross section of the outer sheath is in a circular arc shape, and the bottom of the cross section of the outer sheath is a plane. The optical cable has the effects of improving the space utilization rate and the compression resistance of the optical cable.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical cable manufacturing, in particular to a water-drop-shaped optical cable and a manufacturing method thereof. BACKGROUND

[0002] As the core transmission medium of modern communication networks, the performance of optical cables directly affects the communication quality and reliability. With the development of technologies such as 5G and the Internet of Things, higher requirements are put forward for the space utilization, compression resistance and flame retardance of optical cables. Traditional round-section optical cables have the problem of low space utilization when laid in a narrow space, and the compression resistance is limited. In recent years, flat, rectangular and other special-shaped section optical cables have gradually emerged, but such optical cables still have deficiencies in bending performance and tensile strength. In addition, the water resistance and flame retardance of optical cables are also the focus of the industry, especially in humid environments or high-risk fire scenarios.

[0003] Currently, the industry mainly uses the following schemes to solve the related performance problems of optical cables. First, a round-section optical cable is used in combination with a high-strength metal reinforcing core to improve the tensile strength of the optical cable through the metal reinforcing core. Second, a flat-section optical cable is used to improve the space utilization by its flat shape. Third, a water-blocking tape or water-blocking grease is used to fill the internal gap of the optical cable to achieve water-blocking function. Fourth, a low-smoke halogen-free material is used as an outer sheath to improve the flame retardance of the optical cable.

[0004] In the prior art, traditional round-section optical cables have the problem of low space utilization when laid in a narrow space, and the compression resistance is limited. The use of metal reinforcing cores increases the weight of the optical cable. Although flat, rectangular and other special-shaped section optical cables have certain improvement in space utilization, they still have deficiencies in bending performance and tensile strength. At the same time, the use of metal reinforcing cores increases the weight of the optical cable and is susceptible to electromagnetic interference, the water-blocking tape increases the diameter of the optical cable, the water-blocking grease may pollute the environment, and the low-smoke halogen-free outer sheath material has low mechanical strength, which limits the further development of existing optical cable technology. SUMMARY

[0005] In order to improve the space utilization and compression resistance of the optical cable, the present application provides a water-drop-shaped optical cable and a manufacturing method thereof.

[0006] In a first aspect, the present application provides a water-drop-shaped optical cable, which adopts the following technical scheme: A water-drop-shaped optical cable, comprising an outer sheath, an optical fiber unit, a plurality of reinforcing cores and a plurality of water-blocking layers, the optical fiber unit is composed of a plurality of optical fiber bundles arranged in a central symmetric manner, the reinforcing cores are arranged in parallel on both sides of the optical fiber unit along the length direction of the optical cable, the plurality of water-blocking layers are respectively wrapped outside the optical fiber unit and the plurality of reinforcing cores, and the outer sheath is wrapped outside the plurality of water-blocking layers. The top of the cross section of the outer sheath is arc-shaped, and the bottom of the cross section of the outer sheath is planar.

[0007] By adopting the technical scheme, the optical fiber unit is composed of a plurality of optical fiber bundles arranged in a central symmetry, which can effectively ensure stable transmission of optical signals; the reinforcing cores are arranged in parallel on both sides of the optical fiber unit along the length direction of the optical cable, which can significantly improve the tensile strength of the optical cable, so that the optical cable is not easy to break when subjected to tensile force, and normal operation of the internal optical fiber unit is ensured; the plurality of water-blocking layers are respectively wrapped outside the optical fiber unit and the plurality of reinforcing cores, which can effectively prevent water from entering the optical fiber unit and the reinforcing cores, and avoid the decline of optical signal transmission quality or damage to the performance of the reinforcing cores caused by water; the outer sheath is wrapped outside the plurality of water-blocking layers, which provides mechanical protection for the optical cable, prevents external objects from damaging the internal structure, and has flame-retardant performance, which can reduce the risk of burning of the optical cable in case of fire; the design that the top of the cross section of the outer sheath is arc-shaped and the bottom is flat can reduce the thickness of the optical cable in the vertical direction, improve the space utilization rate when the optical cable is arranged in a narrow space, and the flat bottom enhances the compression resistance of the optical cable, so that the optical cable is not easy to deform when subjected to pressure, and the stability of optical signal transmission is ensured.

[0008] Optionally, the diameter of the top arc of the cross section of the outer sheath is the same as the width of the bottom flat surface.

[0009] By adopting the technical scheme, the diameter of the top arc of the outer sheath of the water-drop-shaped optical cable is the same as the width of the bottom flat surface, which makes the shape of the water-drop-shaped optical cable more regular and optimized, further reduces the thickness in the vertical direction, improves the space utilization rate, and enables the optical cable to more reasonably utilize space when arranged, the regular shape helps to enhance the compression resistance of the flat bottom surface of the optical cable, so that the optical cable can more stably withstand the pressure in the vertical direction, reduces the risk of deformation and damage, and ensures stable transmission of optical signals by the optical fiber unit. In addition, this design is also conducive to the outer sheath to better provide mechanical protection and flame-retardant performance, so that the protection of the outer sheath to the internal structure is more balanced and effective.

[0010] Optionally, the water-blocking layer is formed by spirally winding water-blocking yarn.

[0011] By adopting the technical scheme, the water-blocking layer is formed by spirally winding water-blocking yarn, which can tightly wrap outside the optical fiber unit and the reinforcing cores, effectively fill the gaps between the components, form a continuous and complete water-blocking structure, and thus better prevent water from entering the inside of the optical cable, protect the optical fiber unit to normally transmit optical signals, avoid signal transmission failure caused by water intrusion, and improve the use stability and reliability of the optical cable in a humid environment.

[0012] Optionally, a plurality of scale groups are uniformly and slidably connected to the outer wall of the outer sheath along the axial direction of the outer sheath, and each scale group includes a plurality of bionic scales uniformly distributed in the circumferential direction of the outer sheath.

[0013] By adopting the technical scheme, the outer side wall of the outer sheath is uniformly and slidably connected with a plurality of scale groups along the axial direction of the outer sheath, each scale group comprises a plurality of bionic scales which are uniformly distributed along the circumferential direction of the outer sheath. This design can provide additional mechanical protection for the optical cable. The bionic scales can buffer the impact force of the external environment on the optical cable to some extent, reduce the damage of external forces such as collision and friction to the outer sheath and the internal structure of the optical cable, and reduce the risk of damage to the optical cable caused by external interference. Moreover, when the optical cable is deformed by bending, stretching or the like, the bionic scales can slide along the axial direction of the outer sheath, adaptively adjust the position, reduce the stress concentration caused by deformation, and make the stress more evenly distributed on the surface of the optical cable, thereby improving the flexibility and anti-deformation ability of the optical cable as a whole, and ensuring that the optical cable can still work stably in a complex environment. At the same time, the bionic scales are uniformly distributed along the circumferential direction of the outer sheath, which can protect the optical cable in all directions, effectively block the invasion of impurities such as dust and moisture, and further improve the service life and reliability of the optical cable.

[0014] Optionally, a plurality of sliding grooves are formed in the outer side wall of the outer sheath along the axial and circumferential directions of the outer sheath, and a sliding piece which is slidably connected with the outer sheath along the length direction of the optical cable is arranged in each sliding groove. An end of the bionic scale close to the outer sheath is fixedly provided with a connecting piece which is fixedly connected with the sliding piece.

[0015] By adopting the technical scheme, the sliding grooves formed in the outer side wall of the outer sheath and the sliding pieces arranged in the sliding grooves enable the bionic scales to slide relative to the outer sheath along the length direction of the optical cable after the bionic scales are fixedly connected with the sliding pieces through the connecting pieces. This sliding connection mode gives the bionic scales a certain degree of freedom of movement. When the optical cable is subjected to external forces, the bionic scales can adaptively adjust the position and angle to better disperse and buffer the external forces, thereby enhancing the resistance of the optical cable to the impact of external forces. At the same time, when the optical cable is bent, the bionic scales can slide along the shape of the bending to avoid damage to the optical cable caused by stress concentration due to bending, thereby effectively improving the bending performance and overall durability of the optical cable.

[0016] Optionally, the bionic scale is made of modified polyurethane material.

[0017] By adopting the technical scheme, the modified polyurethane material has good flexibility, wear resistance, corrosion resistance and anti-aging performance, so that the bionic scale made of the material can better fit the outer side wall of the outer sheath. When the optical cable is subjected to external forces such as friction and collision, the bionic scale can effectively protect the outer sheath, reduce the wear and damage of the outer sheath, and prolong the service life of the optical cable. At the same time, the flexibility of the material can make the bionic scale deform with the outer sheath when the optical cable is bent without breaking, thereby ensuring the continuity of the protection of the optical cable by the bionic scale. The corrosion resistance and anti-aging performance of the material can enable the bionic scale to maintain stable performance under different environmental conditions, prevent performance degradation caused by environmental factors, and further improve the stability and reliability of the optical cable as a whole.

[0018] Optionally, the long edges of the adjacent bionic scales are staggered and overlapped.

[0019] By adopting the above technical solution, the long edges of the adjacent bionic scales are staggered and overlapped, which can further enhance the protection of the outer sheath on the internal structure, effectively block the direct impact and scratching of external objects on the optical cable, prevent foreign matters from entering the optical cable, better avoid the invasion of moisture, dust and other impurities, thereby improving the stability and reliability of the optical cable as a whole and prolonging the service life of the optical cable. At the same time, this staggered and overlapped arrangement can also buffer the pressure applied by the outside to a certain extent, reduce the influence on the internal optical fiber unit and other components, and ensure the stable transmission of optical signals.

[0020] In a second aspect, the application provides a manufacturing method of a water-drop-shaped optical cable, comprising the following steps: S1 symmetrically arranging a plurality of optical fiber bundles at the center to form an optical fiber unit; S2 arranging a reinforcing core in parallel on both sides of the optical fiber unit; S3 coating a water-blocking layer outside the optical fiber unit and the reinforcing core; S4 extruding an outer sheath with a water-drop-shaped cross section to coat the water-blocking layer.

[0021] In summary, the application has at least one of the following beneficial technical effects: 1. The optical fiber unit is composed of a plurality of optical fiber bundles distributed in a central symmetric manner, which can effectively ensure the stable transmission of optical signals; the reinforcing core is arranged in parallel on both sides of the optical fiber unit along the length direction of the optical cable, which can significantly improve the tensile strength of the optical cable, so that the optical cable is not easy to break when subjected to tensile force, and the internal optical fiber unit can work normally; the plurality of water-blocking layers are respectively coated outside the optical fiber unit and the reinforcing core, which can effectively prevent moisture from invading the optical fiber unit and the reinforcing core, and avoid the decline of optical signal transmission quality or damage to the performance of the reinforcing core caused by moisture; the outer sheath is coated outside the plurality of water-blocking layers, which provides mechanical protection for the optical cable and prevents external objects from damaging the internal structure, and the outer sheath has flame-retardant performance, which can reduce the risk of burning of the optical cable when a fire occurs; the design of the outer sheath with a circular arc-shaped top and a flat bottom reduces the thickness of the optical cable in the vertical direction, improves the space utilization rate when the optical cable is laid in a narrow space, and the flat bottom enhances the compression resistance of the optical cable, so that the optical cable is not easy to deform when subjected to pressure, ensuring the stability of optical signal transmission; 2. The outer sheath of the water droplet-shaped optical cable has the same diameter of the top arc and the width of the bottom plane, which makes the shape of the water droplet-shaped optical cable more regular and optimized, further reduces the thickness in the vertical direction, improves the space utilization, allows the optical cable to more reasonably use the space when laying, and the regular shape helps to enhance the compression resistance of the bottom plane of the optical cable, so that the optical cable can more stably bear when subjected to vertical pressure, reduces the risk of deformation and damage, and protects the stable transmission of optical signals by the optical fiber unit. In addition, this design is also beneficial to the outer sheath to better provide mechanical protection and flame retardant performance, so that the outer sheath protects the internal structure more evenly and effectively; 3. The water-blocking layer is formed by spirally winding water-blocking yarn, which can tightly cover the outside of the optical fiber unit and the reinforcing core, effectively fill the gaps between the components, form a continuous and complete water-blocking structure, and better prevent water from entering the inside of the optical cable, protect the normal transmission of optical signals by the optical fiber unit, avoid signal transmission failure caused by water intrusion, and improve the use stability and reliability of the optical cable in a humid environment. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a water droplet-shaped optical cable.

[0023] Figure 2 It is a schematic diagram of the axial side structure of a water droplet-shaped optical cable.

[0024] Figure 3 It is a schematic diagram of a bionic scale.

[0025] BRIEF DESCRIPTION OF DRAWINGS: 1, outer sheath; 11, bionic scale; 111, sliding sheet; 112, connecting sheet; 12, sliding groove; 2, optical fiber unit; 21, optical fiber bundle; 3, reinforcing core; 4, water-blocking layer. DETAILED DESCRIPTION

[0026] The present application will be further described in detail below in combination with all the drawings.

[0027] In a first aspect, the embodiments of the present application disclose a water droplet-shaped optical cable.

[0028] REFERENCE Figure 1The application discloses a water-drop-shaped optical cable, which comprises an outer sheath 1, an optical fiber unit 2, a plurality of reinforcing cores 3 and a plurality of water-blocking layers 4. The optical fiber unit 2 is located at a central position, and the reinforcing cores 3 are arranged in parallel along the length direction of the optical cable on both sides of the optical fiber unit 2, so that the tensile strength of the optical cable can be obviously improved, the optical cable is not easy to be broken when subjected to a tensile force, and the internal optical fiber unit 2 can normally work. When the optical cable works, the optical fiber unit 2 transmits optical signals, and the reinforcing cores 3 provide the tensile strength. The plurality of water-blocking layers 4 are respectively wrapped outside the optical fiber unit 2 and the plurality of reinforcing cores 3, and the outer sheath 1 is wrapped outside the plurality of water-blocking layers 4. The top of the section of the outer sheath 1 is in an arc shape, and the bottom is in a plane. Such a structure can reduce the thickness of the optical cable in the vertical direction, improve the space utilization, and meanwhile, the bottom plane can improve the compression resistance.

[0029] Specifically, the optical fiber unit 2 is composed of a plurality of optical fiber bundles 21 which are distributed in a central symmetry. The optical fiber bundle 21 is usually composed of a plurality of small optical fibers, and the optical fiber is generally made of silica and the like and has good optical transmission performance. In actual application, a replaceable material such as a plastic optical fiber can be used to meet different use scenarios and cost requirements. The optical fiber bundles 21 are distributed in a radial central symmetry in the optical fiber unit 2. Such an arrangement mode can make the optical signals more uniformly distributed in the transmission process and reduce signal interference. In addition to the radial arrangement, a ring arrangement and the like can also be used. The central symmetry of the optical fiber bundles 21 can help improve the stability and reliability of the signal transmission of the optical cable, because the symmetric structure can make the influence of the external environment on each optical fiber bundle 21 more consistent, and avoid signal transmission abnormalities caused by uneven force and the like The reinforcing core 3 is generally made of a high-strength material, for example, the reinforcing core 3 is made of high-strength glass fibers with a diameter of 0.5 mm, and the number is 4. The glass fiber has the advantages of light weight, high strength and anti-electromagnetic interference. The number and distribution of the reinforcing core 3 are determined according to the specific requirements of the optical cable, and the reinforcing core 3 is usually arranged in parallel along the length direction of the optical cable on both sides of the optical fiber unit 2 to provide good tensile strength. In addition to the glass fiber, aramid fiber and the like can also be used as a replaceable option of the reinforcing core 3, and the aramid fiber has higher strength and better flexibility.

[0030] The water-blocking layer 4 prevents water from entering the inside of the optical cable and affecting the transmission performance of the optical fiber. The water-blocking layer 4 is formed by spirally winding water-blocking yarns. The water-blocking yarn is usually a material with water absorption and swelling properties, which will swell when encountering water, thereby preventing water from further penetrating. In the winding process, the water-blocking yarn tightly wraps the outside of the optical fiber unit 2 and the reinforcing core 3, forming a continuous water-blocking barrier, which can effectively prevent water from entering the optical fiber unit 2 and the reinforcing core 3, and avoid the decline of the optical signal transmission quality and the damage of the performance of the reinforcing core 3 caused by water.

[0031] The outer sheath 1 covers the outside of the water-blocking layer 4, serving to protect the internal structure and improve the flame-retardant performance. The top of the outer sheath 1 section is circular arc-shaped, and the bottom is flat. This water-drop-shaped design not only helps to improve the space utilization rate but also enhances the compression resistance. The material of the outer sheath 1 can be selected from materials with good mechanical properties and flame-retardant performance, providing mechanical protection for the optical cable, preventing external objects from damaging the internal structure, and reducing the risk of burning the optical cable in case of fire. The thickness and size of the outer sheath 1 are designed according to the specifications and use requirements of the optical cable to ensure that it can provide sufficient protection.

[0032] The top circular arc diameter of the outer sheath 1 section is the same as the bottom flat width. This design makes the shape of the outer sheath 1 more regular and symmetrical, reducing the thickness of the optical cable in the vertical direction, improving the space utilization rate and compression resistance, and enhancing the overall aesthetics and stability of the optical cable. The flat bottom enhances the compression resistance of the optical cable, making it less likely to deform when under pressure, ensuring the stability of optical signal transmission. During the manufacturing process, the forming process of the outer sheath 1 needs to be more precisely controlled to ensure the consistency of the top circular arc diameter and the bottom flat width. For example, the outer sheath 1 can be 1.2 mm thick, with a water-drop-shaped section having a top circular arc radius of 3 mm and a bottom flat width of 6 mm.

[0033] The outer sheath 1 has several scale groups uniformly connected along its own axial direction, and each scale group includes several biomimetic scales 11 uniformly distributed along the circumferential direction of the outer sheath 1. This design can provide additional mechanical protection for the optical cable. The biomimetic scales 11 are inspired by the scale structure of some organisms in nature, with good protection and drag reduction performance. The biomimetic scales 11 can to some extent buffer the impact force of the external environment on the optical cable, reduce the damage of external forces such as collision and friction to the outer sheath 1 and internal structure of the optical cable, and reduce the risk of damage to the optical cable caused by external interference. Moreover, when the optical cable is deformed by bending, stretching, etc., the biomimetic scales 11 can slide along the axial direction of the outer sheath 1, adaptively adjusting the position, reducing the stress concentration caused by deformation, and making the stress more evenly distributed on the surface of the optical cable, thereby improving the overall flexibility and anti-deformation ability of the optical cable, ensuring that the optical cable can still work stably in complex environments. At the same time, the biomimetic scales 11 are uniformly distributed along the circumferential direction of the outer sheath 1, which can protect the optical cable in all directions, effectively block the intrusion of dust, moisture and other impurities, and further improve the service life and reliability of the optical cable.

[0034] Specifically, the outer side wall of the outer sheath 1 is provided with a plurality of sliding grooves 12 along the axial and circumferential directions, the sliding grooves 12 are provided with sliding pieces 111 which are in sliding connection with the outer sheath 1 along the length direction of the optical cable, and the end of the bionic scale 11 close to the outer sheath 1 is fixedly provided with a connecting piece 112 which is fixedly connected with the sliding piece 111. Through this structure, the bionic scale 11 can slide on the outer sheath 1, and when the optical cable is subjected to external force, the bionic scale 11 can adaptively adjust the position to disperse the external force and improve the impact resistance of the optical cable.

[0035] The bionic scale 11 is made of modified polyurethane material, which has good flexibility and wear resistance, and can ensure that the bionic scale 11 is not easily damaged during sliding. In addition to modified polyurethane material, rubber material with similar properties can also be used to make the bionic scale 11. The bionic scale 11 has a size of 5mm in length and 8mm in width, and the long edges of adjacent bionic scales 11 are staggered and overlapped along the axial direction of the optical cable. Such arrangement makes the scales better overlapped to form a continuous pressure bearing surface when under pressure. Each bionic scale 11 is slidable along the axial direction of the optical cable, and the sliding range is ±2mm. The bionic scale 11 slides through the sliding groove 12 structure on the surface of the outer sheath 1, and the sliding groove 12 can limit the sliding range of the bionic scale 11 to ensure that it will not come off the sheath. When subjected to external pressure, the bionic scales 11 will automatically overlap together to form a continuous pressure bearing surface, thereby improving the compression strength of the optical cable; when subjected to fluid impact, the gaps between the bionic scales 11 form micro-vortex flow, which makes the water separation point forward, thereby reducing the fluid resistance. The bionic scales 11 are arranged along the surface of the sheath and form gaps, which will produce micro-vortex flow when impacted by fluid, thereby reducing the fluid resistance. In order to better form micro-vortex flow, the surface of the bionic scale 11 can be designed to have a shape with small protrusions or grooves, which can enhance the effect of micro-vortex flow.

[0036] The implementation principle of the water droplet-shaped optical cable according to an embodiment of the present application is as follows: the optical fiber unit 2 is composed of a plurality of optical fiber bundles 21 arranged in a central symmetry, which can effectively ensure stable transmission of optical signals; the reinforcing core 3 is arranged in parallel on both sides of the optical fiber unit 2 along the length direction of the optical cable, which can significantly improve the tensile strength of the optical cable, so that the optical cable is not easy to break when subjected to tensile force, and the internal optical fiber unit 2 can work normally; a plurality of water-blocking layers 4 are respectively wrapped outside the optical fiber unit 2 and the plurality of reinforcing cores 3, which can effectively prevent water from entering the optical fiber unit 2 and the reinforcing core 3, and avoid the decline of optical signal transmission quality or the damage of the performance of the reinforcing core 3 caused by water; the outer sheath 1 is wrapped outside the plurality of water-blocking layers 4, which provides mechanical protection for the optical cable and prevents external objects from damaging the internal structure, and the outer sheath 1 has a flame-retardant property, which can reduce the risk of burning of the optical cable when a fire occurs; the design of the outer sheath 1 with a circular arc-shaped top and a flat bottom can reduce the thickness of the optical cable in the vertical direction, improve the space utilization rate when the optical cable is arranged in a narrow space, and the flat bottom can enhance the compression resistance of the optical cable, so that the optical cable is not easy to deform when subjected to pressure, and the stability of optical signal transmission is ensured.

[0037] In another aspect, the present application discloses a manufacturing method of a water droplet-shaped optical cable, which comprises the following steps: S1: arranging a plurality of optical fiber bundles 21 in a central symmetry to form an optical fiber unit 2. In this step, first, the required optical fiber bundles 21 are prepared, and then they are arranged in a central symmetry according to the design requirements. Special arrangement tools such as arrangement plates can be used to ensure that the optical fiber bundles 21 are arranged in an orderly and symmetrical manner. After the arrangement is completed, the optical fiber bundles 21 can be fixed together using glue or other fixing methods to ensure their stability.

[0038] S2: arranging reinforcing cores 3 in parallel on both sides of the optical fiber unit 2. When arranging the reinforcing cores 3, it is necessary to ensure that the reinforcing cores 3 are parallel to the optical fiber unit 2 and have uniform spacing. Tools such as clamps can be used to assist in positioning and fixing the reinforcing cores 3 to ensure that they do not shift during subsequent processing.

[0039] S3: wrapping water-blocking layers 4 outside the optical fiber unit 2 and the reinforcing cores 3. The water-blocking layers 4 are wrapped in a spiral manner using water-blocking yarn, and during the wrapping process, the speed and tension of the wrapping need to be controlled to ensure that the water-blocking yarn tightly wraps outside the optical fiber unit 2 and the reinforcing cores 3. Other wrapping methods or water-blocking materials can also be selected according to actual conditions.

[0040] S4: extruding an outer sheath 1 with a water droplet-shaped cross section to wrap the water-blocking layers 4. The material of the outer sheath 1 is heated and melted using an extruder, and then extruded into an outer sheath 1 with a water droplet-shaped cross section through a special-shaped mold, and wrapped outside the water-blocking layers 4. During the extrusion process, the process parameters such as temperature and pressure need to be controlled to ensure the quality and dimensional accuracy of the outer sheath 1.

[0041] The implementation principle of the embodiment is that: through the above steps, the various components are combined together according to certain order and process requirements, and the water drop-shaped optical cable with good performance is manufactured. The manufacturing method is simple and easy to implement, and can ensure the quality and performance stability of the optical cable. Compared with the traditional manufacturing method, the method can better realize the forming of the water drop-shaped outer sheath 1, improve the space utilization and compression resistance of the optical cable, and also ensure the requirements of other performance indicators, has high production efficiency and economic benefits.

[0042] The above are preferred embodiments of the present application, not to limit the protection scope of the present application, therefore: all equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A water droplet shaped optical cable characterized by: The cable comprises an outer sheath (1), a fiber unit (2), a plurality of reinforcing cores (3) and a plurality of water-blocking layers (4), the fiber unit (2) is composed of a plurality of fiber bundles (21) arranged in a central symmetry, the reinforcing cores (3) are arranged in parallel along the length direction of the cable on both sides of the fiber unit (2), the plurality of water-blocking layers (4) are respectively wrapped outside the fiber unit (2) and the plurality of reinforcing cores (3), the outer sheath (1) is wrapped outside the plurality of water-blocking layers (4), the top of the cross section of the outer sheath (1) is arc-shaped, and the bottom of the cross section of the outer sheath (1) is flat.

2. A water-drop shaped optical cable according to claim 1, characterized in that: The diameter of the top arc of the cross section of the outer sheath (1) is the same as the width of the bottom flat surface.

3. A water-drop shaped optical cable according to claim 1, characterized in that: The water-blocking layer (4) is formed by spiral winding of water-blocking yarn.

4. The water-drop shaped optical cable of claim 1, wherein: The outer side wall of the outer sheath (1) is uniformly and slidably connected with a plurality of scale groups along the axial direction of the outer sheath (1), each scale group comprises a plurality of bionic scales (11) uniformly distributed along the circumferential direction of the outer sheath (1).

5. A water-drop shaped optical cable according to claim 4, characterized in that: The outer side wall of the outer sheath (1) is provided with a plurality of sliding grooves (12) along the axial direction and the circumferential direction of the outer sheath (1), the sliding grooves (12) are provided with sliding pieces (111) slidably connected with the outer sheath (1) along the length direction of the cable, and one end of the bionic scale (11) close to the outer sheath (1) is fixedly provided with a connecting piece (112) fixedly connected with the sliding piece (111).

6. A water-drop shaped optical cable according to claim 4, characterized in that: The bionic scale (11) is made of modified polyurethane material.

7. A water-drop shaped optical cable according to claim 4, characterized in that: The long edges of the adjacent bionic scales (11) are arranged in an interlaced and overlapped mode.

8. A method for manufacturing a water-drop-shaped optical cable, applied to the water-drop-shaped optical cable according to any one of claims 1-7, characterized in that, The method comprises the following steps: S1, arranging a plurality of fiber bundles (21) in a central symmetry to form a fiber unit (2); S2, arranging reinforcing cores (3) in parallel on both sides of the fiber unit (2); S3, wrapping water-blocking layers (4) outside the fiber unit (2) and the reinforcing cores (3); S4, extruding an outer sheath (1) with a water-drop-shaped cross section to wrap the water-blocking layers (4).

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