An optical and electrical hybrid cable with easy access

Abstract

The application belongs to the technical field of cables, and particularly discloses an easy-to-pull optical and electrical hybrid cable, which comprises a cable core, the cable core comprises at least three outer reinforcing members and at least three loose sleeves, the loose sleeves and the outer reinforcing members are arranged at intervals, at least one optical fiber is arranged in each loose sleeve, all the loose sleeves and all the outer reinforcing members are connected through a plurality of layers of connecting assemblies arranged along the axial direction of the cable core, each layer of the connecting assemblies comprises the same number of movable connecting members as the number of the outer reinforcing members, each movable connecting member is provided with a containing hole, the containing holes on the same side of the adjacent outer reinforcing members are coaxial and form a coaxial hole group, and one electrical unit is arranged in the coaxial hole group; the application has the beneficial effects of convenient pulling and laying, good mechanical properties, good protection effect on the loose sleeves, light weight, low cost and the like.

Description

Technical Field

[0001] This invention belongs to the field of cable technology, and in particular discloses an easy-to-connect optical-electric hybrid cable. Background Technology

[0002] With the widespread application of home broadband and 5G, the electrical or optical unit access points of their end cables are numerous and widespread. During the network construction process, as the coverage of optical networks increases, the traditional deployment scheme has problems such as complicated and difficult-to-manage cables, frequent splicing affecting network quality, high cabling difficulty and high construction cost, and the subsequent maintenance and management are also very difficult.

[0003] To address the above issues, the market is currently promoting easy-splitting cables on a large scale. This cabling method involves laying the cable once and then splicing the transmission units as needed, offering advantages such as fewer breakpoints, more stable links, and lower optical attenuation, effectively solving the problems of traditional cabling. In existing technology, CN120195827A discloses an intermittent skeleton easy-splitting optical cable, including a skeleton, optical units, an outer sheath, and color stripes. The skeleton consists of a feeder, a non-metallic reinforcing core, ridges, and a skeleton sheath. The skeleton extends radially outward to form multiple ridges, which are intermittently distributed along the longitudinal axis. The optical units are arranged in multiple strands, evenly distributed in the space around the skeleton. The skeleton and optical units are wrapped in an outer sheath. Multiple sets of color stripes of different colors are arranged on the outer wall of the outer sheath to locate the optical units. The above-mentioned existing technology has the following drawbacks: 1. It requires breaking the outer sheath to form a splice interface to connect the optical units; 2. Its mechanical performance is relatively weak; 3. Laying is relatively inconvenient. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to disclose an easy-to-connect hybrid optical and electrical cable, which is achieved using the following technical solution.

[0005] An easy-to-connect optical-electric hybrid cable includes a cable core, the cable core including at least three external reinforcing members with circular cross-sections and external reinforcing members with circular outer edges, the number of external reinforcing members being the same as the number of loose tubes, the loose tubes and external reinforcing members being spaced apart, and at least one optical fiber being provided inside the loose tube; All loose tubes and all external reinforcements are connected by multi-layer connection assemblies arranged along the cable core axis. Each connection assembly includes the same number of movable connectors as the external reinforcements, and each movable connector has a receiving hole. From back to front, in the connecting assemblies of odd-numbered layers, the external reinforcing member and the loose sleeve on the adjacent clockwise side are respectively sleeved at both ends of a movable connecting member; in the connecting assemblies of even-numbered layers, the external reinforcing member and the loose sleeve on the adjacent counterclockwise side are respectively sleeved at both ends of a movable connecting member. The receiving holes of all movable connectors between the external reinforcement and the adjacent loose tube on the same side are coaxial and form a coaxial hole group. At least one electrical unit is inserted in the coaxial hole group, and the remaining coaxial hole groups are inserted with an electrical unit or a tight-fitting optical fiber.

[0006] The aforementioned easy-to-connect fiber optic hybrid cable includes a connecting component, a first sleeve ring located at the upper end of the connecting component, and a second sleeve ring located at the lower end of the connecting component. The receiving hole is located in the middle of the connecting component. The first sleeve ring is fitted onto the outer reinforcing member, and the second sleeve ring is fitted onto the loose tube.

[0007] The aforementioned easy-to-connect optical-electric hybrid cable has a connecting component with a width smaller than the diameter of the first and second loops.

[0008] In the aforementioned easy-to-connect fiber optic hybrid cable, all the second loops outside the loose tube are arranged in a tightly packed sequence.

[0009] In the aforementioned easy-to-connect fiber optic hybrid cable, the axes of all external reinforcing members are located on the same circumference, and the axes of all loose tubes are also located on the same circumference. The radius of the circumference where the axes of the external reinforcing members are located is greater than the radius of the circumference where the axes of the loose tubes are located.

[0010] The aforementioned easy-to-connect fiber optic hybrid cable has a central reinforcing member inside the cable core and an outer sheath outside the cable core. The outer sheath is tightly attached to the first loop, and the portion of the outer sheath located between two adjacent outer reinforcing members is recessed towards the center of the cable core without contacting the second loop.

[0011] In the aforementioned easy-to-connect fiber optic hybrid cable, all external reinforcing members and all loose tube axes are located on the same circumference.

[0012] The aforementioned easy-to-connect fiber optic hybrid cable has a central reinforcing member inside the cable core and an outer sheath outside the cable core.

[0013] The aforementioned easy-to-connect fiber optic hybrid cable, when the number of external reinforcing members is any even number greater than or equal to four, within the same cross-section, if there are only four external reinforcing members, the four external reinforcing members are located at the four vertices of the same rectangle respectively; if there are more than four external reinforcing members, the four external reinforcing members are located at the four vertices of the same rectangle respectively; the remaining external reinforcing members are located on the four sides of the rectangle or any two opposite sides, and the number of external reinforcing members on the two opposite sides is equal. The line connecting the axis of the loose tube and the axis of the adjacent external reinforcing members on both sides of the loose tube forms a V-shape, and the bottom of the V-shape is concave into the inside of the rectangle.

[0014] The aforementioned easy-to-connect fiber optic hybrid cable has a central reinforcing member inside the cable core, an outer sheath outside the cable core, and a padding layer outside the central reinforcing member, with the sidewall of the padding layer tightly attached to the inner wall of the cable core.

[0015] The aforementioned easy-to-connect fiber optic hybrid cable has a movable connector that can be forcefully rotated around the axis of the corresponding external reinforcing member, and can also be forcefully rotated around the axis of the corresponding loose tube.

[0016] The aforementioned easy-to-connect fiber optic hybrid cable has an outer sheath made of high-density polyethylene with a thickness ranging from 1.6mm to 2.5mm.

[0017] The aforementioned easy-to-connect optical-electric hybrid cable has a loose tube made of polybutylene terephthalate. Depending on the number of internal optical fibers, the outer diameter ranges from 1.8mm to 3.0mm, and the wall thickness ranges from 0.25mm to 0.45mm.

[0018] The aforementioned easy-to-connect fiber optic hybrid cable has movable connectors made of polybutylene terephthalate, with the first and second rings having a thickness of 0.5-0.6 mm.

[0019] The aforementioned easy-to-connect fiber optic hybrid cable has an electrical unit consisting of a copper conductor and an insulation layer extruded outside the copper conductor. The insulation layer material is polyvinyl chloride, and the copper conductor is made of multiple thin copper wires twisted together.

[0020] The aforementioned easy-to-connect optical-electric hybrid cable has an external reinforcing member made of phosphated steel wire or glass fiber reinforced plastic rod.

[0021] The aforementioned easy-to-connect optical-electric hybrid cable has a central reinforcing member made of phosphated steel wire or glass fiber reinforced plastic rod.

[0022] This application has the advantages of easy connection, easy installation, good mechanical properties, good protection for loose pipes, light weight, and low cost. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of a segment of Embodiment 1 of the present invention.

[0024] Figure 2 This is the front view of Embodiment 1 of the present invention.

[0025] Figure 3 This is a three-dimensional structural diagram of a section of cable core according to Embodiment 1 of the present invention.

[0026] Figure 4 This is a front view of the cable core of Embodiment 1 of the present invention.

[0027] Figure 5 This is a front view of the movable connector in Embodiment 1 of the present invention.

[0028] Figure 6 This is a three-dimensional structural schematic diagram of a segment of Embodiment 2 of the present invention.

[0029] Figure 7 This is the front view of Embodiment 2 of the present invention.

[0030] Figure 8 This is a three-dimensional structural diagram of a section of cable core according to Embodiment 2 of the present invention.

[0031] Figure 9 This is a front view of the cable core of Embodiment 2 of the present invention.

[0032] Figure 10 This is a three-dimensional structural schematic diagram of a segment of Embodiment 3 of the present invention.

[0033] Figure 11 This is the front view of Embodiment 3 of the present invention.

[0034] Figure 12 This is a three-dimensional structural diagram of a section of cable core according to Embodiment 3 of the present invention.

[0035] Figure 13 This is a front view of the cable core of Embodiment 3 of the present invention.

[0036] In the figure, the corresponding figures are as follows: 1. Outer sheath, 2. Cable core, 21. Movable connector, 211. First ring, 212. Connecting component, 213. Receiving hole, 214. Second ring, 22. External reinforcement, 23. Electrical unit, 24. Loose tube, 25. Optical fiber, 3. Central reinforcement, 4. Padding layer. Detailed Implementation

[0037] Example 1: As Figures 1 to 5 An easy-to-connect fiber optic hybrid cable includes, from the outside to the inside, an outer sheath 1, a cable core 2, and a central reinforcing member 3. The cable core 2 includes eight external reinforcing members 22 with circular cross-sections and eight loose tubes 24 with circular outer edges. The outer diameter of the loose tubes 24 is the same as the diameter of the external reinforcing members 22. At least one optical fiber 25 is provided inside the loose tube 24. In the same cross-section, the axes of the eight external reinforcing members 22 are located on the same circumference, and the axes of the eight loose tubes 24 are also located on the same circumference. The radius of the circumference where the axis of the external reinforcing member 22 is located is larger than the radius of the circumference where the axis of the loose tube 24 is located, and each loose tube 24 is located between two adjacent external reinforcing members 22. All loose tubes 24 and all external reinforcing members 22 are connected by a multi-layer connecting assembly arranged along the axial direction of the cable core 2. Each connecting assembly includes eight movable connectors 21. Each movable connector 21 includes a connecting member 212, a first collar 211 located at the upper end of the connecting member 212, and a second collar 214 located at the lower end of the connecting member 212. A receiving hole 213 is provided in the middle of the connecting member 212. The width of the connecting member 212 is smaller than the diameter of the first collar 211 and the second collar 214. From back to front, in the connection assembly of the odd-numbered layers, the outer reinforcement 22 is connected to the loose tube 24 on the adjacent clockwise side by a movable connector 21, the first collar 211 is sleeved on the outside of the outer reinforcement 22, and the second collar 214 is sleeved on the outside of the loose tube 24. From back to front, in the even-numbered layer connection assembly, the outer reinforcement 22 is connected to the loose tube 24 on the adjacent counterclockwise side via a movable connector 21, the first collar 211 is sleeved on the outer reinforcement 22, and the second collar 214 is sleeved on the loose tube 24. All the second rings 214 outside the loose sleeve 24 are arranged closely in sequence. The receiving holes 213 of all the movable connecting parts 21 between the external reinforcing member 22 and the adjacent loose sleeve 24 on the same side are coaxial and form a coaxial hole group. An electrical unit 23 passes through the coaxial hole group. The movable connector 21 can be forcefully rotated around the axis of the corresponding external reinforcing member 22, and can also be forcefully rotated around the axis of the corresponding loose sleeve 24; The outer sheath 1 is tightly attached to the first ring 211. The portion of the outer sheath 1 located between two adjacent external reinforcing members 22 is recessed towards the center of the cable core 2 and does not contact the second ring 214, which facilitates the construction personnel in determining the position of the loose tube 24 and the electrical unit 23. During pipeline laying, it can reduce friction with the pipeline and facilitate construction. During air blowing construction, it can increase the contact surface of the airflow and facilitate air blowing construction. Moreover, when the recessed area is impacted, the impact force can be buffered by the elasticity of the outer sheath 1 at the recessed area, and the force can be dispersed by the fine adjustment of the position of the movable connector 21, the loose tube 24 and the external reinforcing member 22.

[0038] Example 2: As Figures 6 to 9 and refer to Figure 5 An easy-to-connect optical-electric hybrid cable includes, from the outside to the inside, an outer sheath 1, a cable core 2, and a central reinforcing member 3. The cable core 2 includes eight external reinforcing members 22 with circular cross-sections and eight loose tubes 24 with circular outer edges. The outer diameter of the loose tubes 24 is the same as the diameter of the external reinforcing members 22. At least one optical fiber 25 is provided inside the loose tubes 24. In the same cross-section, the axes of the eight external reinforcing members 22 and the eight loose tubes 24 are located on the same circumference, and the loose tubes 24 and the external reinforcing members 22 are spaced apart. All loose tubes 24 and all external reinforcing members 22 are connected by a multi-layer connecting assembly arranged along the axial direction of the cable core 2. Each connecting assembly includes eight movable connectors 21. Each movable connector 21 includes a connecting member 212, a first collar 211 located at the upper end of the connecting member 212, and a second collar 214 located at the lower end of the connecting member 212. A receiving hole 213 is provided in the middle of the connecting member 212. The width of the connecting member 212 is smaller than the diameter of the first collar 211 and the second collar 214. From back to front, in the connection assembly of the odd-numbered layers, the outer reinforcement 22 is connected to the loose tube 24 on the adjacent clockwise side by a movable connector 21, the first collar 211 is sleeved on the outside of the outer reinforcement 22, and the second collar 214 is sleeved on the outside of the loose tube 24. From back to front, in the even-numbered layer connection assembly, the outer reinforcement 22 is connected to the loose tube 24 on the adjacent counterclockwise side via a movable connector 21, the first collar 211 is sleeved on the outer reinforcement 22, and the second collar 214 is sleeved on the loose tube 24. All the second rings 214 outside the loose sleeve 24 are arranged closely in sequence. The receiving holes 213 of all the movable connecting parts 21 between the external reinforcing member 22 and the adjacent loose sleeve 24 on the same side are coaxial and form a coaxial hole group. An electrical unit 23 passes through the coaxial hole group. The movable connector 21 can be forcefully rotated about the axis of the corresponding external reinforcing member 22, and can also be forcefully rotated about the axis of the corresponding loose sleeve 24.

[0039] Example 3: As Figures 10 to 13 and refer to Figure 5 An easy-to-connect fiber optic hybrid cable includes, from the outside to the inside, an outer sheath 1, a cable core 2, and a central reinforcing member 3. The cable core 2 includes eight external reinforcing members 22 with circular cross-sections and eight loose tubes 24 with circular outer edges. The outer diameter of the loose tubes 24 is the same as the diameter of the external reinforcing members 22. At least one optical fiber 25 is provided inside the loose tube 24. In the same cross-section, the eight external reinforcing members 22 are located at the four vertices and the middle of the four sides of the same square, and the loose tubes 24 and the external reinforcing members 22 are spaced apart. The line connecting the axis of the loose tube 24 and the axis of the adjacent external reinforcing members 22 on both sides of the loose tube 24 forms a V-shape, and the bottom of the V-shape is recessed into the inside of the square. All loose tubes 24 and all external reinforcing members 22 are connected by a multi-layer connecting assembly arranged along the axial direction of the cable core 2. Each connecting assembly includes eight movable connectors 21. Each movable connector 21 includes a connecting member 212, a first collar 211 located at the upper end of the connecting member 212, and a second collar 214 located at the lower end of the connecting member 212. A receiving hole 213 is provided in the middle of the connecting member 212. The width of the connecting member 212 is smaller than the diameter of the first collar 211 and the second collar 214. From back to front, in the connection assembly of the odd-numbered layers, the outer reinforcement 22 is connected to the loose tube 24 on the adjacent clockwise side by a movable connector 21, the first collar 211 is sleeved on the outside of the outer reinforcement 22, and the second collar 214 is sleeved on the outside of the loose tube 24. From back to front, in the even-numbered layer connection assembly, the outer reinforcement 22 is connected to the loose tube 24 on the adjacent counterclockwise side via a movable connector 21, the first collar 211 is sleeved on the outer reinforcement 22, and the second collar 214 is sleeved on the loose tube 24. All the second rings 214 outside the loose sleeve 24 are arranged closely in sequence. The receiving holes 213 of all the movable connecting parts 21 between the external reinforcing member 22 and the adjacent loose sleeve 24 on the same side are coaxial and form a coaxial hole group. An electrical unit 23 passes through the coaxial hole group. The movable connector 21 can be forcefully rotated around the axis of the corresponding external reinforcing member 22, and can also be forcefully rotated around the axis of the corresponding loose sleeve 24; The center reinforcement 3 is provided with a pad 4. In order to restrict the position of the movable connector 21, the external reinforcement 22 and the loose tube 24, the side wall of the pad 4 is in close contact with the inner wall of the cable core 2.

[0040] In this application, the number of external reinforcing members 22 and loose sleeves 24 can be any number greater than or equal to three, as long as the number of external reinforcing members 22 and loose sleeves 24 is equal.

[0041] In any of the above embodiments, the outer sheath 1 is made of high-density polyethylene and has a thickness ranging from 1.6mm to 2.5mm.

[0042] In any of the above embodiments, the loose tube 24 is made of polybutylene terephthalate, and its outer diameter ranges from 1.8mm to 3.0mm and its wall thickness ranges from 0.25mm to 0.45mm, depending on the number of internal optical fibers 25.

[0043] In any of the above embodiments, the material of the movable connector 21 is polybutylene terephthalate, and the thickness of the first ring 211 and the second ring 214 is 0.5-0.6 mm.

[0044] In any of the above embodiments, the easy-to-connect optical-electric hybrid cable has an electrical unit 23 consisting of a copper conductor and an insulation layer extruded outside the copper conductor. The insulation layer material is polyvinyl chloride, and the copper conductor is made of multiple thin copper wires twisted together.

[0045] In any of the above embodiments, the easy-to-connect optical-electric hybrid cable has an external reinforcing member 22 that is a phosphated steel wire or a glass fiber reinforced plastic rod.

[0046] In any of the above embodiments, the easily spliced ​​optical-electric hybrid cable has a central reinforcing member 3 made of phosphated steel wire or glass fiber reinforced plastic rod.

[0047] In any of the above embodiments, in an easy-to-connect optical-electric hybrid cable, some electrical units 23 can be replaced by tight-buffered optical fibers.

[0048] The easy-to-connect fiber optic hybrid cable described in any of the above embodiments can be equipped with movable connectors 21 of different lengths as needed, thereby adjusting the width of the connection interval. The width range of the movable connectors 21 is [20cm, 100cm].

[0049] The easy-to-connect optical-electric hybrid cable described in any of the above embodiments has a movable connector 21 integrally formed.

[0050] Example 4: Reference Figures 3 to 5 An easy-to-connect fiber optic hybrid cable includes a cable core 2, which includes eight external reinforcing members 22 with circular cross-sections and eight loose tubes 24 with circular outer edges. The outer diameter of the loose tubes 24 is the same as the diameter of the external reinforcing members 22. At least one optical fiber 25 is provided inside the loose tube 24. In the same cross-section, the axes of the eight external reinforcing members 22 are located on the same circumference, and the axes of the eight loose tubes 24 are also located on the same circumference. The radius of the circumference where the axes of the external reinforcing members 22 are located is larger than the radius of the circumference where the axes of the loose tubes 24 are located, and each loose tube 24 is located between two adjacent external reinforcing members 22. All loose tubes 24 and all external reinforcing members 22 are connected by a multi-layer connecting assembly arranged along the axial direction of the cable core 2. Each connecting assembly includes eight movable connectors 21. Each movable connector 21 includes a connecting member 212, a first collar 211 located at the upper end of the connecting member 212, and a second collar 214 located at the lower end of the connecting member 212. A receiving hole 213 is provided in the middle of the connecting member 212. The width of the connecting member 212 is smaller than the diameter of the first collar 211 and the second collar 214. From back to front, in the connection assembly of the odd-numbered layers, the outer reinforcement 22 is connected to the loose tube 24 on the adjacent clockwise side by a movable connector 21, the first collar 211 is sleeved on the outside of the outer reinforcement 22, and the second collar 214 is sleeved on the outside of the loose tube 24. From back to front, in the even-numbered layer connection assembly, the outer reinforcement 22 is connected to the loose tube 24 on the adjacent counterclockwise side via a movable connector 21, the first collar 211 is sleeved on the outer reinforcement 22, and the second collar 214 is sleeved on the loose tube 24. All the second rings 214 outside the loose sleeve 24 are arranged closely in sequence. The receiving holes 213 of all the movable connectors 21 between the external reinforcing member 22 and the adjacent loose sleeve 24 on the same side are coaxial and form a coaxial hole group. An electrical unit 23 passes through the coaxial hole group.

[0051] In this embodiment, since the second ring 214 is continuously and tightly arranged outside the loose sleeve, it has formed a protection for the loose sleeve 24, and the circumference where the loose sleeve 24 is located is inside the circumference where the outer reinforcing member 22 is located, it is not necessary to use the outer protective layer 1.

[0052] In this embodiment, the outer diameter of the loose sleeve 24 and the diameter of the external reinforcing member 22 can also be different. When the outer diameter of the loose sleeve 24 and the diameter of the external reinforcing member 22 are different, the diameter of the external reinforcing member 22 is larger than the outer diameter of the loose sleeve 24. In this way, without affecting the electrical unit 23, the two adjacent external reinforcing members 22 can be closer together, which better protects the loose sleeve 24 and the electrical unit 23. When the electrical unit 23 needs to be taken out, simply open the external reinforcing members 22 on both sides with force and take out the electrical unit 23 from the joint gap.

[0053] In Embodiment 1 of this application, since the tensile element includes an external reinforcing member 22 and a central reinforcing member 3, the external reinforcing member 22 and the loose tube 24 are spaced apart, and the loose tube 24 is located between the external reinforcing member 22 and the central reinforcing member 3, the tensile performance of the optical-electric hybrid cable of this application is greatly improved compared with the structure with only the central reinforcing member 3 of the same cross-sectional area.

[0054] Ordinary GYTY structure optical cables can withstand a short-term tensile force of 3000N with an additional optical fiber attenuation of no more than 0.1dB; under a long-term tensile force of 1000N, the optical fiber has no residual additional attenuation (≤0.03dB), but under a short-term tensile force of 5000N, the additional optical fiber attenuation increases significantly.

[0055] The applicant selected an external reinforcing member 22 made of glass fiber reinforced plastic with an outer diameter of 2.0 mm and a central reinforcing member 3 made of glass fiber reinforced plastic with an outer diameter of 2.0 mm, and an extruded pad 4 on the outside of the central reinforcing member 3, to adapt to the cable core structure. In the tensile test simulating overhead laying, the optical fiber hybrid cable of this application had an additional optical fiber attenuation of no more than 0.1 dB under a short-term tensile force of 7000 N; and no significant residual additional optical fiber attenuation (≤0.03 dB) under a long-term tensile force of 3000 N.

[0056] The applicant's partial optical fiber attenuation test of the optoelectronic hybrid cable of Example 1 meets the requirements of ≤0.215dB@1550nm and ≤0.350dB@1310nm.

[0057] This application can be used as a smart sensor or smart sensing element; since it can transmit voice and images, it can also be used as a physical sensor, such as a voice sensor or an image sensor; since it transmits light signals through the principle of total internal reflection, it can also be used as a distance sensor; the optical fiber in this application is itself an optical waveguide, so it can be used as an optical waveguide, such as an arrayed optical waveguide or a diffractive optical waveguide; this application can also be used in the field of optical computing, as part of optical chip computing, optical computing, optical network computing, and optical computing.

[0058] This application has the following beneficial effects: 1. All loose tubes 24 and all external reinforcements 22 are connected by multi-layer connecting assemblies arranged from back to front. The adjacent odd-numbered connecting assemblies or the adjacent even-numbered connecting assemblies form a gap that allows the electrical unit 23 or the tight-buffered optical fiber to be spliced ​​out, which facilitates splicing.

[0059] 2. The cross-section of cable core 2 can be adapted to the structure of the pipe cross-section, which facilitates pipe laying.

[0060] 3. When the loop formed by the axis connecting the loose tube 24 is located inside the loop formed by the axis connecting the outer reinforcement 22, the outer reinforcement 22 can better protect the loose tube 24 and the electrical unit 23 or the tight-buffered optical fiber when the optoelectronic hybrid cable of this application is squeezed or impacted.

[0061] 4. All the second rings 214 outside the loose sleeve 24 are arranged in a tight sequence, and the second rings 214 can provide uninterrupted protection for the loose sleeve 24.

[0062] 5. The outer sheath 1 is tightly attached to the first ring 211. The portion of the outer sheath 1 located between two adjacent external reinforcing members 22 is recessed towards the center of the cable core 2 and does not contact the second ring 214, which facilitates the construction personnel in determining the position of the loose tube 24 and the electrical unit 23. During pipeline laying, it can reduce friction with the pipeline and facilitate construction. During air blowing construction, it can increase the contact surface of the airflow and facilitate air blowing construction. Moreover, when the recessed area is impacted, the impact force can be buffered by the elasticity of the outer sheath 1 at the recessed area, and the force can be dispersed by the fine adjustment of the position of the movable connector 21, the loose tube 24 and the external reinforcing member 22.

[0063] 6. When the outer sheath 1 and the central reinforcing member 3 are not used, the weight of the optical-electric hybrid cable of this application can be greatly reduced, the cost can be reduced, and the outer sheath 1 can be removed without damage. This facilitates the connection of the electrical unit 23 and makes it easier to lay overhead. When laying overhead, only a hook or wire needs to be used to pass through the gap between two adjacent movable connectors 21 of the same outer reinforcing member 22 and fix it to the load-bearing steel wire.

[0064] 7. Each movable connector 21 is independent, and damage to any one or more movable connectors 21 will not affect the structure and performance of the optical-electric hybrid cable of this application.

[0065] 8. It has better tensile, compressive and impact resistance properties.

[0066] 9. When the outer protective layer 1 and the central reinforcing member 3 are not used, the end splicing only requires removing several movable connecting members 21 at the end to be spliced, without the need for cutting tools or other destructive tools, which facilitates construction.

[0067] 10. By employing multi-layer connection components, even with a sufficient number of layers, the optical-electric hybrid cable of this application can still be ensured to have good flexibility.

[0068] 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. An easy-to-connect fiber optic hybrid cable, comprising a cable core (2), characterized in that, The cable core (2) includes at least three external reinforcing members (22) with circular cross-sections and external reinforcing members (22) with circular outer edges. The number of external reinforcing members (22) is the same as that of loose tubes (24). Loose tubes (24) and external reinforcing members (22) are spaced apart. At least one optical fiber (25) is provided inside the loose tube (24). All loose tubes (24) and all external reinforcing members (22) are connected by a multi-layer connecting assembly arranged along the axial direction of the cable core (2). Each connecting assembly includes the same number of movable connectors (21) as the number of external reinforcing members (22). Each movable connector (21) is provided with a receiving hole (213). From back to front, in the connection assembly of odd-numbered layers, the external reinforcement (22) and the adjacent loose tube (24) on the clockwise side are respectively sleeved at both ends of a movable connector (21). In the connection assembly of even-numbered layers, the external reinforcement (22) and the adjacent loose tube (24) on the counterclockwise side are respectively sleeved at both ends of a movable connector (21). The receiving holes (213) of all movable connectors (21) between the external reinforcement (22) and the adjacent loose tube (24) on the same side are coaxial and form a coaxial hole group. At least one coaxial hole group has an electrical unit (23) inserted in it, and the remaining coaxial hole groups have an electrical unit (23) or a tight-fitting optical fiber inserted in them.

2. The easy-to-connect fiber optic hybrid cable according to claim 1, characterized in that, The movable connector (21) includes a connecting part (212), a first collar (211) located at the upper end of the connecting part (212) and a second collar (214) located at the lower end of the connecting part (212). The receiving hole (213) is located in the middle of the connecting part (212). The first collar (211) is sleeved on the outside of the outer reinforcing member (22), and the second collar (214) is sleeved on the outside of the loose sleeve (24).

3. The easy-to-connect fiber optic hybrid cable according to claim 2, characterized in that, The width of the connecting part (212) is smaller than the diameter of the first collar (211) and the second collar (214), and all the second collars (214) outside the loose sleeve (24) are arranged closely in sequence.

4. The easy-to-split optical-electric hybrid cable according to claim 3, characterized in that, Within the same cross section, the axes of all external reinforcing members (22) are located on the same circumference, and the axes of all loose sleeves (24) are also located on the same circumference. The radius of the circumference where the axes of the external reinforcing members (22) are located is greater than the radius of the circumference where the axes of the loose sleeves (24) are located.

5. The easy-to-connect fiber optic hybrid cable according to claim 4, characterized in that, The cable core (2) is provided with a central reinforcing member (3) inside and an outer sheath (1) outside. The outer sheath (1) is in close contact with the first ring (211). The portion of the outer sheath (1) located between two adjacent outer reinforcing members (22) is recessed towards the center of the cable core (2) and does not contact the second ring (214).

6. The easy-to-connect fiber optic hybrid cable according to claim 3, characterized in that, Within the same cross-section, the axes of all external reinforcements (22) and all loose sleeves (24) are located on the same circumference.

7. The easy-to-connect fiber optic hybrid cable according to claim 6, characterized in that, The cable core (2) is provided with a central reinforcing member (3) inside, and an outer sheath (1) is provided outside the cable core (2).

8. The easy-to-connect fiber optic hybrid cable according to claim 3, characterized in that, When the number of external reinforcing members (22) is any even number greater than or equal to four, in the same cross section, when there are only four external reinforcing members (22), the four external reinforcing members (22) are located at the four vertices of the same rectangle respectively. When there are more than four external reinforcing members (22), the four external reinforcing members (22) are located at the four vertices of the same rectangle respectively. The remaining external reinforcing members (22) are located on the four sides of the rectangle or any two opposite sides. The number of external reinforcing members (22) on the two opposite sides is equal. The line connecting the axis of the loose sleeve (24) and the axis of the external reinforcing members (22) adjacent to both sides of the loose sleeve (24) forms a V shape. The bottom of the V shape is concave into the inside of the rectangle.

9. The easy-to-connect fiber optic hybrid cable according to claim 8, characterized in that, The cable core (2) has a central reinforcing member (3) inside, an outer sheath (1) outside, a padding layer (4) outside the central reinforcing member (3), and the side wall of the padding layer (4) is in close contact with the inner wall of the cable core (2).

10. The easy-to-connect fiber optic hybrid cable according to any one of claims 1 to 9, characterized in that, The movable connector (21) can be rotated about the axis of the corresponding external reinforcement (22) and also about the axis of the corresponding loose sleeve (24).

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