Composite optical fiber transmission cable

Abstract

The utility model discloses a composite optical fiber transmission cable in the field of transmission cables, which comprises an optical fiber unit and a plurality of electric power units, and further comprises a reinforcing unit, the optical fiber unit, the reinforcing unit and the plurality of electric power units are wrapped into a cable through a wrapping tape, an armor layer is arranged outside the wrapping tape, an outer sheath is arranged outside the armor layer, and the outer sheath is arranged outside the outer sheath. The optical fiber unit comprises a micro-tube and an air-blowing micro-cable, and a gap is reserved between the air-blowing micro-cable and the micro-tube. According to the utility model, laid air-blowing micro-cables can be replaced or new air-blowing micro-cables can be added according to requirements, so that rewiring when user requirements change is avoided, and resource waste is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of transmission cable technology, and specifically relates to a composite optical fiber transmission cable. Background Technology

[0002] Existing technology discloses a composite optical fiber transmission cable (publication number: CN221446828U; application date: 2023-08-30; publication date: 2024-07-30), comprising: an optical fiber cable and a power cable. The optical fiber cable has a composite core, and the power cable consists of multiple groups, each composed of stranded multi-strand metal wires. Each group of power cables has an external insulation layer. The power cables and optical fiber cables are arranged at equal intervals, with a filler core between them. Each group of power cables and optical fiber cables is sequentially surrounded by a wrapping layer, an inner lining layer, and a sheath layer. This invention simplifies the structural layers of the optical cable by integrating optical fibers into the structural layers of the power cable, enabling it to simultaneously perform power transmission and optical fiber communication. The external sheath layers of both the optical fiber and power cables provide excellent protection, significantly increasing their service life and reducing operating costs. Its shortcomings are that the type and capacity of the optical fiber in the cable are fixed. As the data traffic increases, the inadequacy of the optical fiber's capacity and performance will become apparent during use. Rewiring is expensive and laborious, resulting in a lot of wasted resources. Utility Model Content

[0003] The purpose of this invention is to provide a composite optical fiber transmission cable that can replace existing air-blown microcables or add new air-blown microcables as needed, avoiding rewiring when user needs change and reducing resource waste.

[0004] The purpose of this utility model is achieved as follows: a composite optical fiber transmission cable includes an optical fiber unit and multiple power units, and also includes a reinforcing unit. The optical fiber unit, reinforcing unit and multiple power units are wrapped together by a wrapping tape to form a cable. An armor layer is provided outside the wrapping tape, and an outer sheath is provided outside the armor layer. The optical fiber unit includes a microtube and an air-blown microcable, and a gap is left between the air-blown microcable and the microtube.

[0005] In using this invention, the main body of the cable (excluding the air-blown microcable) is laid first. After the line construction is completed, the air-blown microcable is then blown into the microtube. Compared with the prior art, the beneficial effects of this invention are: the air-blown microcable has a small diameter and light weight, a larger single-blow length, and a faster blowing speed, which can effectively shorten the project construction cycle; the reinforced unit can improve the performance and reliability of the cable during cable laying and use, protect the optical fiber unit and power unit from external physical and chemical damage, and improve network transmission quality; under the dual action of the armor layer and the microtube, the air-blown microcable can be more firmly protected. If repair or replacement is required, the air-blown microcable can be laid conveniently and quickly for repair, greatly reducing fault handling time and improving the operation and maintenance quality of communication lines.

[0006] As a further improvement of this utility model, the strengthening unit and multiple power units are arranged around the outer periphery of the optical fiber unit with the optical fiber unit as the center.

[0007] As a further improvement of this utility model, water-blocking rope is filled between the optical fiber unit, the reinforcing unit and the multiple power units and the wrapping tape.

[0008] As a further improvement of this utility model, the air-blown microcable includes an optical fiber core, a loose tube is provided on the outside of the optical fiber core, fiber grease is filled between the optical fiber core and the loose tube, a lubricating layer is provided on the outside of the loose tube, and the microtube is made of HDPE high-density polyethylene material.

[0009] As a further improvement of this utility model, the lubricating layer is a polytetrafluoroethylene film layer.

[0010] As a further improvement of this utility model, the power unit includes a conductor, an insulating layer, a shielding layer, and a protective sleeve arranged sequentially from the inside out.

[0011] As a further improvement of this utility model, the conductor adopts a second type of circular conductor structure conforming to GB / T3956, and is formed by regular concentric single-wire stranding.

[0012] As a further improvement of this utility model, the shielding layer is made of tin-plated copper wire mesh, and the weaving density of the tin-plated copper wire mesh is 60%~80%.

[0013] As a further improvement of this utility model, the protective sleeve is made of TPE thermoplastic elastomer material.

[0014] As a further improvement of this utility model, the reinforcing unit is made of multiple strands of steel wire twisted together. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a side view of the present invention.

[0017] Figure 3 This is a cross-sectional view of the present invention.

[0018] Among them, 1 is the optical fiber unit, 101 is the microtube, 102 is the air-blown microcable, 102a is the optical fiber core, 102b is the loose tube, 102c is the fiber grease, 102d is the lubricating layer, 2 is the reinforcing unit, 3 is the power unit, 301 is the conductor, 302 is the insulation layer, 303 is the shielding layer, 304 is the protective sleeve, 4 is the wrapping tape, 5 is the water-blocking rope, 6 is the armor layer, and 7 is the outer sheath. Detailed Implementation

[0019] like Figure 1-3 As shown, a composite optical fiber transmission cable includes an optical fiber unit 1, a reinforcing unit 2, and three power units 3. The optical fiber unit 1, reinforcing unit 2, and three power units 3 are wrapped together by a wrapping tape 4. Preferably, the reinforcing unit 2 and three power units 3 are arranged around the optical fiber unit 1 with the optical fiber unit 1 as the center. This layout design can provide effective support and protection for the optical fiber unit 1, increase the tensile strength of the cable, and improve the overall bending performance, ensuring that the cable is not broken during laying and use, and that it can still maintain good transmission performance when bent. To improve the waterproof performance of the cable, a water-blocking rope 5 is filled between the optical fiber unit 1, reinforcing unit 2, and three power units 3 and the wrapping tape 4. An armor layer 6 is provided outside the wrapping tape 4, and an outer sheath 7 is provided outside the armor layer 6. Specifically, the optical fiber unit 1 includes a microtube 101 and an air-blown microcable 102. The microtube 101 is preferably made of HDPE high-density polyethylene material, and a gap is left between the air-blown microcable 102 and the microtube 101.

[0020] The air-blown microcable 102 includes an optical fiber core 102a, a loose tube 102b disposed on the outside of the optical fiber core 102a, fiber grease 102c filling the space between the optical fiber core 102a and the loose tube 102b, and a lubricating layer 102d disposed on the outside of the loose tube 102b. In this embodiment, the lubricating layer 102d is a polytetrafluoroethylene film layer with an extremely low coefficient of friction, which greatly reduces the frictional resistance between the microcable and the microtube 101 and further improves the construction efficiency during air-blowing construction.

[0021] Power unit 3 includes, from the inside out, a conductor 301, an insulation layer 302, a shielding layer 303, and a protective sleeve 304. The conductor 301 adopts a Class II circular conductor structure conforming to GB / T3956, formed by regular concentric single-wire stranding. This stranding method prevents deformation of the conductor 301 when the strands are bent. The shielding layer 303 is made of tin-plated copper wire mesh with a weaving density of 70%, retaining the good conductivity of copper while improving oxidation and corrosion resistance. The protective sleeve 304 is made of TPE thermoplastic elastomer material. The reinforcing unit 2 is made of multi-strand steel wire, possessing high strength and corrosion resistance, effectively protecting the optical cable from external physical and chemical damage.

[0022] The advantages of this utility model are as follows: This cable is suitable for harsh environments or communication systems that require long-term stable operation; the protective sleeve 304 made of TPE has excellent flexibility and elastic recovery ability, which can prevent the cable from being squeezed and damaged by the microtube 101, thereby ensuring the integrity of the microtube 101. The protective sleeve 304 also has good insulation performance, which can effectively prevent current leakage and reduce the risk of electrical accidents; the microtube 101 made of HDPE has high strength and rigidity, and can withstand a certain amount of external impact, leaving enough space for the air-blown microcable 102 to pass through.

[0023] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. A composite optical fiber transmission cable, comprising optical fiber units and multiple power units, characterized in that, It also includes a reinforcement unit. The optical fiber unit, the reinforcement unit, and multiple power units are wrapped together by a tape. An armor layer is provided outside the tape, and an outer sheath is provided outside the armor layer. The optical fiber unit includes a microtube and an air-blown microcable, with a gap between the air-blown microcable and the microtube.

2. The composite optical fiber transmission cable according to claim 1, characterized in that, The strengthening unit and multiple power units are arranged around the outer periphery of the optical fiber unit, with the optical fiber unit as the center.

3. The composite optical fiber transmission cable according to claim 1, characterized in that, Water-blocking ropes are filled between the optical fiber unit, the reinforcing unit, and the multiple power units and the wrapping tape.

4. The composite optical fiber transmission cable according to claim 1, characterized in that, The air-blown microcable includes an optical fiber core, a loose tube on the outside of the optical fiber core, fiber grease filling the space between the optical fiber core and the loose tube, a lubricating layer on the outside of the loose tube, and the microtube is made of HDPE high-density polyethylene material.

5. A composite optical fiber transmission cable according to claim 4, characterized in that, The lubricating layer is a polytetrafluoroethylene thin film layer.

6. The composite optical fiber transmission cable according to claim 1, characterized in that, The power unit includes a conductor, an insulation layer, a shielding layer, and a protective sleeve arranged sequentially from the inside out.

7. A composite optical fiber transmission cable according to claim 6, characterized in that, The conductor adopts a Class II circular conductor structure conforming to GB / T3956, and is formed by regular concentric single-wire stranding.

8. A composite optical fiber transmission cable according to claim 6, characterized in that, The shielding layer is made of tin-plated copper wire mesh, and the weaving density of the tin-plated copper wire mesh is 60%~80%.

9. A composite optical fiber transmission cable according to claim 6, characterized in that, The protective sleeve is made of TPE thermoplastic elastomer material.

10. A composite optical fiber transmission cable according to claim 1, characterized in that, The reinforcing unit is made of multiple strands of steel wire twisted together.

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