Flexible air-blowing micro cable easy to construct and split

Abstract

The invention discloses a flexible air-blowing micro cable easy to construct and split, and belongs to the technical field of optical fibers. The flexible air-blowing micro cable comprises a plurality of cable core assemblies, a skeleton assembly and an outer sheath. The framework assembly is of a carbon fiber structure and comprises a plurality of supporting frames and a plurality of connecting strips, each supporting frame comprises a plurality of supporting rods and a plurality of limiting rods, the other end of each supporting rod and the corresponding limiting rod form a T-shaped structure, each connecting strip is of a spiral structure, and the multiple corresponding limiting rods in the first direction are connected through one connecting strip. The plurality of cable core assemblies are twisted on the skeleton assembly, and the two supporting rods and the two corresponding limiting rods form a limiting space used for clamping the corresponding cable core assemblies. According to the flexible air-blowing micro-cable easy to construct and split, through the carbon fiber frame structure, the flexible air-blowing micro-cable has certain rigidity and is easy to bend, the construction efficiency of the air-blowing micro-cable is improved, and the processing cost of the air-blowing micro-cable is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of optical fiber, and particularly relates to a soft air-blow microcable easy to construct and branch. BACKGROUND

[0002] With the development of urbanization and mobile communication technology, the laying pipeline resources of optical cables are increasingly strained, and even crowded. The air-blow microcable has obvious advantages in laying in the pipeline compared with the traditional optical cable, greatly improves the utilization rate of existing pipeline resources, reduces or avoids the excavation of new communication pipelines, thereby reducing the overall cost of the project. At present, the existing air-blow microcable is provided with a central reinforcing core, and a plurality of cable cores are twisted on the central reinforcing core. The central reinforcing core plays a supporting role and also provides a large stiffness to prevent uneven stress from causing deformation of the optical cable.

[0003] However, when the air-blow microcable is constructed in the pipeline, the large stiffness provided by the central reinforcing core often makes the air-blow microcable not easy to pass through the small bending radius pipeline, thereby reducing the construction efficiency of the air-blow microcable. SUMMARY

[0004] In view of the above defects or improvement needs of the prior art, the present application provides a soft air-blow microcable easy to construct and branch, which aims to not only make reliable support to the plurality of cable core assemblies while having certain stiffness and easy bending characteristics through the carbon fiber frame structure, thereby improving the construction efficiency of the air-blow microcable, but also enabling the limiting of the cable core assemblies through the limiting rods after twisting, thereby reducing the processing cost of the air-blow microcable.

[0005] To achieve the above-mentioned purpose, according to one aspect of the present application, the present application provides a soft air-blow microcable easy to construct and branch, which comprises a plurality of cable core assemblies, a framework assembly and an outer sheath. The framework assembly is a carbon fiber structure, and comprises a plurality of support frames and a plurality of connecting strips. The plurality of support frames are arranged at intervals along a first direction, and each support frame is located in a first plane. The first plane is perpendicular to the first direction. Each support frame comprises a plurality of support rods and a plurality of limiting rods. One end of each support rod is fixedly connected, and the other end of each support rod forms a T-shaped structure with the corresponding limiting rod. Adjacent T-shaped structures are arranged at intervals in the circumferential direction. Each connecting strip is a spiral structure, and a plurality of corresponding limiting rods in the first direction are connected by one connecting strip. The plurality of cable core assemblies are twisted on the framework assembly, and any two adjacent support rods and the corresponding two limiting rods form a limiting space for clamping the corresponding cable core assembly. The plurality of cable core assemblies and the framework assembly are located in the outer sheath.

[0006] Optionally, each of the support frames further includes a support ring, the other end of each of the support rods is fixed to the outer circumference of the support ring, and the other end of each of the support rods is arranged along the radial direction of the support ring.

[0007] Optionally, each of the cable core assemblies includes a plurality of optical units and a water-blocking tape, the plurality of optical units are twisted together, and the plurality of optical units are covered with the water-blocking tape.

[0008] Optionally, each of the optical units includes a sleeve and a plurality of optical fibers, and the sleeve is sleeved outside the plurality of optical fibers.

[0009] Optionally, the sleeve is made of thermoplastic elastomer or thermoplastic polyurethane.

[0010] Optionally, the water-blocking tape is wrapped around the outside of the plurality of light units by overlapping.

[0011] Optionally, the flexible air-blown microcable further comprises at least one open cable, wherein the open cable is located between the cable core assembly and the outer sheath.

[0012] Optionally, in the first direction, the interval between two adjacent support frames is 100mm-150mm.

[0013] Optionally, the outer diameter of the outer sheath is 9mm-20mm.

[0014] Optionally, the number of the support rods of each support frame is at least 3.

[0015] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0016] In general, the above technical solutions conceived by the present invention have the following beneficial effects compared with the prior art: The embodiment of the present invention provides a flexible air-blown micro-cable that is easy to construct and easy to branch. Since one end of each support rod is fixedly connected, the other end of each support rod forms a T-shaped structure with the corresponding limit rod, and each connecting strip is a spiral structure, and the corresponding multiple limit rods along the first direction are connected by a connecting strip, so that the entire skeleton assembly forms a continuous frame structure (considered to be hollow inside) in the axial direction of the air-blown micro-cable, and the stability and structural strength of the entire frame structure are guaranteed by multiple spaced support frames and multiple spiral connecting strips. On this basis, the skeleton assembly is a carbon fiber structure, so that the frame structure has a certain rigidity and easy bending characteristics while reliably supporting multiple cable core assemblies, so that the air-blown micro-cable can easily pass through a small bending radius pipe, thereby improving the construction efficiency of the air-blown micro-cable.

[0017] Further, the plurality of cable core assemblies are stranded on the framework assembly, and any two adjacent support rods and the corresponding two limiting rods form a limiting space for clamping the corresponding cable core assembly, that is, when the plurality of cable core assemblies are stranded, the flexibility (deformability) of the limiting rods can clamp each cable core assembly from the outside of the framework assembly into the limiting space, and after stranding, the two limiting rods can limit (prevent the cable core assembly from escaping from the gap between the two limiting rods), the overall structure is compact, and there is no need to additionally set up a yarn or a water-blocking tape and the like to cover the plurality of cable core assemblies, thereby reducing the processing cost of the air-blown micro cable. In addition, the outer sheath can protect the plurality of cable core assemblies and the framework assembly.

[0018] That is, the soft air-blown micro cable provided by the application is easy to construct and branch, has certain rigidity and easy bending characteristics while reliably supporting the plurality of cable core assemblies through the carbon fiber frame structure, improves the construction efficiency of the air-blown micro cable, and limits the cable core assembly through the limiting rod after stranding, thereby reducing the processing cost of the air-blown micro cable. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a sectional view of the soft air-blown micro cable easy to construct and branch provided by the embodiment of the application; Figure 2 is a structural schematic view of the framework assembly provided by the embodiment of the application.

[0020] In all the drawings, the same reference signs represent the same technical features, specifically: 1, cable core assembly; 11, optical unit; 111, sleeve; 112, optical fiber; 12, water-blocking tape; 2, framework assembly; 21, support frame; 211, support rod; 212, limiting rod; 213, support ring; 214, limiting space; 22, connecting strip; 3, outer sheath; 4, cable opening rope. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the application more clear, the application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and do not limit the application. In addition, the technical features involved in each embodiment of the application described below can be combined with each other as long as they do not conflict with each other.

[0022] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0023] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0024] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0026] Embodiment: Figure 1 is a cross-sectional view of a soft air-blow micro-cable provided by an embodiment of the present application, as shown in Figure 1 The soft air-blow micro-cable includes a plurality of cable core assemblies 1, a skeleton assembly 2 and an outer sheath 3. The skeleton assembly 2 is a carbon fiber structure.

[0027] Figure 2 is a structural schematic diagram of the framework assembly provided by the embodiment of the present application, as shown in Figure 2 The framework assembly 2 is a carbon fiber structure, and the framework assembly 2 comprises a plurality of support frames 21 and a plurality of connecting strips 22. The plurality of support frames 21 are arranged at intervals along a first direction (X-axis direction), and each support frame 21 is located in a first plane perpendicular to the first direction. Each support frame 21 comprises a plurality of support rods 211 and a plurality of limiting rods 212. One end of each support rod 211 is fixedly connected, and the other end of each support rod 211 forms a T-shaped structure with the corresponding limiting rod 212. Adjacent T-shaped structures are arranged at intervals in the circumferential direction. Each connecting strip 22 is a spiral structure, and a plurality of corresponding limiting rods 212 in the first direction are connected by one connecting strip 22. A plurality of cable core assemblies 1 are stranded on the framework assembly 2, and any two adjacent support rods 211 and the corresponding two limiting rods 212 form a limiting space 214 for clamping the corresponding cable core assembly 1. The plurality of cable core assemblies 1 and the framework assembly 2 are located in an outer sheath 3.

[0028] For the flexible air-blow micro-cable provided by the embodiment of the present application, since one end of each support rod 211 is fixedly connected, the other end of each support rod 211 forms a T-shaped structure with the corresponding limiting rod 212, and each connecting strip 22 is a spiral structure, and a plurality of corresponding limiting rods 212 in the first direction are connected by one connecting strip 22, the entire framework assembly 2 forms a continuous frame structure (considered as internal hollow) in the air-blow micro-cable axial direction, and the stability and structural strength of the entire frame structure are ensured by the plurality of support frames 21 arranged at intervals and the plurality of spiral connecting strips 22. On this basis, the framework assembly 2 is a carbon fiber structure, so that the frame structure not only reliably supports the plurality of cable core assemblies 1, but also has certain rigidity and easy bending characteristics, so that the air-blow micro-cable can easily pass through a small bending radius pipeline, thereby improving the construction efficiency of the air-blow micro-cable.

[0029] Further, the plurality of cable core assemblies 1 are stranded on the framework assembly 2, and any two adjacent support rods 211 and the corresponding two limiting rods 212 form a limiting space 214 for clamping the corresponding cable core assembly 1. That is, when stranding the plurality of cable core assemblies 1, the flexibility (deformability) of the limiting rod 212 can clamp each cable core assembly 1 from the outside of the framework assembly 2 into the limiting space 214, and after stranding, the two limiting rods 212 realize limiting (avoiding the cable core assembly 1 from escaping from the gap between the two limiting rods 212). The overall structure is compact, and it is not necessary to additionally provide a yarn binding or a water-blocking belt structure to cover the plurality of cable core assemblies 1, thereby reducing the processing cost of the air-blow micro-cable. In addition, the outer sheath 3 can protect the plurality of cable core assemblies 1 and the framework assembly 2.

[0030] That is, the soft air-blow micro-cable provided by the application is easy to construct and branch, has certain rigidity and easy bending characteristics while reliably supporting the plurality of cable core assemblies 1 through the carbon fiber frame structure, improves the construction efficiency of the air-blow micro-cable, and can limit the cable core assemblies 1 through the limiting rods 212 after being twisted, thereby reducing the processing cost of the air-blow micro-cable.

[0031] In addition, the carbon fiber frame structure corresponding to the snowflake-shaped support frame 21 and the spiral connecting strip 22 is adopted in the air-blow micro-cable, the overall tensile and compressive flatness and impact resistance are obviously better than those of ordinary air-blow micro-cables, and the softness is greater. Moreover, the cable core assemblies 1 are arranged in the carbon fiber frame, thereby reducing the problem of excessive attenuation of the traditional layer-twisted air-blow micro-cable structure due to the pressure of the central reinforcing core on the sleeve 111 when the bending radius is small, so that the air-blow micro-cable of the structure can use a smaller reel to take up the line, and the packaging and transportation costs are saved.

[0032] In the embodiment, the interval between the two adjacent support frames 21 in the first direction is 100mm-150mm, so as to ensure the rigidity of the framework assembly 2.

[0033] Exemplarily, the outer diameter of the outer sheath 3 is 9mm-20mm.

[0034] Preferably, the length of the support rod 211 is 4-5mm, the length of the limiting rod 212 is 2-2.5mm, and the diameter of the support rod 211, the diameter of the limiting rod 212 and the diameter of the connecting strip 22 are all 0.3-0.5mm.

[0035] Continuing to refer to Figure 1 Each support frame 21 further comprises a support ring 213, and the other end of each support rod 211 is fixed to the outer periphery of the support ring 213, and the other end of each support rod 211 is arranged along the radial direction of the support ring 213.

[0036] In the above embodiment, the support ring 213 can provide a larger support area, and facilitate the fixation of the other end of the support rod 211. Moreover, the support ring 213 has stable structure, and can more reliably support the plurality of support rods 211.

[0037] Exemplarily, the outer diameter of the support ring 213 is 6-8mm.

[0038] In addition, the number of the support rods 211 of each support frame 21 is at least 3, and the plurality of support rods 211 can ensure the structural strength of the support frame 21. It is easy to understand that the number of the support rods 211 determines the size of each limiting space 214, and the size of the limiting space 214 is determined according to the size of each cable core assembly 1.

[0039] In an implementation form of the present application, each cable core assembly 1 comprises a plurality of optical units 11 and a water-blocking tape 12, the plurality of optical units 11 being twisted and the plurality of optical units 11 being wrapped by the water-blocking tape 12. The plurality of optical units 11 serve the function of communication, and the water-blocking tape 12 serves the function of fixing and water-blocking.

[0040] Exemplarily, the number of the support rods 211 can be 6, and the included angle between two adjacent support rods 211 is 60°. Correspondingly, the number of the optical units 11 is also 6, and each optical unit 11 is clamped in the corresponding limiting space 214.

[0041] Further, each optical unit 11 comprises a sleeve 111 and a plurality of optical fibers 112, and the sleeve 111 is sleeved outside the plurality of optical fibers 112.

[0042] In addition, the sleeve 111 is made of thermoplastic elastomer (TPE) or thermoplastic polyurethane (TPU). The sleeve 111 made of such material can be easily stripped, so that it is more convenient to branch and melt the fibers during construction, thereby greatly improving the welding efficiency.

[0043] In the present embodiment, the water-blocking tape 12 is wrapped outside the plurality of optical units 11 by lapping.

[0044] Specifically, the water-blocking tape 12 has a hot melt adhesive layer with a thickness of about 5 mm at the edge. During the production of the tape, the lapped part can be wrapped into a bundle of cable core assemblies 1 by means of hot air blowing, contact sealing or laser sealing.

[0045] Exemplarily, the soft air-blowing microcable further comprises at least one cable opening rope 4, which is located between the cable core assembly 1 and the outer sheath 3, so as to facilitate the stripping of the outer sheath 3.

[0046] It is to be understood that the above-described embodiments are merely exemplary of the application and that modifications, equivalent substitutes and improvements not described above are intended to be included within the scope of the application. Therefore, the true scope and spirit of the application should be defined by the appended claims.

Claims

1. A flexible air-blown microcable that is easy to construct and branch, characterized in that: The flexible air-blown microcable comprises a plurality of cable core components (1), a skeleton component (2) and an outer sheath (3); The skeleton component (2) is a carbon fiber structure, and the skeleton component (2) includes a plurality of support frames (21) and a plurality of connecting bars (22). The plurality of support frames (21) are arranged at intervals along a first direction, and each of the support frames (21) is located in a first plane, and the first plane is perpendicular to the first direction. Each of the support frames (21) includes a plurality of support rods (211) and a plurality of limiting rods (212), and one end of each of the support rods (211) is fixedly connected, and the other end of each of the support rods (211) forms a T-shaped structure with the corresponding limiting rod (212), and adjacent The T-shaped structures are arranged at intervals along the circumferential direction, each of the connecting bars (22) is a spiral structure, and a plurality of corresponding limiting rods (212) along the first direction are connected by one connecting bar (22), a plurality of the cable core assemblies (1) are twisted on the skeleton assembly (2), and any two adjacent support rods (211) and the corresponding two limiting rods (212) form a limiting space (214) for clamping the corresponding cable core assembly (1), and the plurality of the cable core assemblies (1) and the skeleton assembly (2) are located in the outer sheath (3).

2. The flexible air-blown microcable that is easy to construct and branch according to claim 1 is characterized in that: Each support frame (21) further comprises a support ring (213), the other end of each support rod (211) is fixed to the outer periphery of the support ring (213), and the other end of each support rod (211) is arranged along the radial direction of the support ring (213).

3. The flexible air-blown microcable that is easy to construct and branch according to claim 1 is characterized in that: Each of the cable core assemblies (1) comprises a plurality of optical units (11) and a water-blocking tape (12); the plurality of optical units (11) are twisted together, and the plurality of optical units (11) are covered with the water-blocking tape (12).

4. The flexible air-blown microcable that is easy to construct and branch according to claim 3 is characterized in that: Each optical unit (11) comprises a sleeve (111) and a plurality of optical fibers (112), wherein the sleeve (111) is sleeved outside the plurality of optical fibers (112).

5. The flexible air-blown microcable that is easy to construct and branch according to claim 4 is characterized in that: The sleeve (111) is made of thermoplastic elastomer or thermoplastic polyurethane.

6. The flexible air-blown microcable that is easy to construct and branch according to claim 3 is characterized in that: The water blocking tape (12) is overlapped and wrapped around the plurality of light units (11).

7. The flexible air-blown microcable that is easy to construct and branch according to claim 1 is characterized in that: The flexible air-blown microcable further comprises at least one open cable (4), wherein the open cable (4) is located between the cable core assembly (1) and the outer sheath (3).

8. A flexible air-blown microcable that is easy to construct and branch according to any one of claims 1 to 7, characterized in that: In the first direction, the interval between two adjacent support frames (21) is 100 mm to 150 mm.

9. A flexible air-blown microcable that is easy to construct and branch according to any one of claims 1 to 7, characterized in that: The outer diameter of the outer sheath (3) is 9 mm to 20 mm.

10. A flexible air-blown microcable that is easy to construct and branch according to any one of claims 1 to 7, characterized in that: The number of the support rods (211) of each support frame (21) is at least three.

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