384-core layer stranded OPGW (Optical Fiber Composite Overhead Ground Wire) optical cable

Abstract

The utility model discloses a 384 core layer stranded OPGW optical cable, which comprises a central aluminum-clad steel wire, a plurality of outer layer aluminum-clad steel wires, a plurality of optical units and a plurality of aluminum alloy wires, the plurality of outer layer aluminum-clad steel wires and the plurality of optical units are stranded on the outer side of the central aluminum-clad steel wire to form a middle layer, and the plurality of aluminum alloy wires are stranded on the outer side of the middle layer. The optical unit comprises a plurality of optical fiber bundles and a stainless steel tube, the optical fiber bundles are arranged on the inner side of the stainless steel tube, and the outer side of each optical fiber bundle in the stainless steel tube is wrapped with yarn of different colors. According to the utility model, a marking scheme of color wire yarn binding is adopted to solve the optical fiber distinguishing problem of a large-core-number OPGW optical cable, the yarn binding process and the colored optical fiber can be synchronously performed to form a tube, the optical fiber looping manufacturing process is reduced, the risk of attenuation abnormity caused by over-dense color rings is reduced, the OPGW structure is optimized, the small-diameter optical fiber is designed, and the production efficiency is improved. The outer diameter of the optical cable is kept unchanged under the condition that the number of optical fiber cores is increased.

Description

Technical Field

[0001] The utility model relates to an OPGW optical cable, in particular to a 384 core layer twisted OPGW optical cable, belonging to the technical field of optical cables. Background Art

[0002] With the rapid development of global communication technology and the in-depth promotion of smart grid construction, the power system has an increasing demand for communication bandwidth and data capacity. Ultra-large core count OPGW optical cables are increasingly used in power communication lines due to their high-capacity communication advantages. The outer layer of ultra-large core count OPGW optical cables is wrapped with metal wires, which have excellent electrical and mechanical properties. They can withstand various harsh conditions in the external environment and ensure the stable operation of the power system. This high reliability and stability make ultra-large core count OPGW optical cables the first choice for customers in the overseas market.

[0003] Due to the complex structure and large number of cores of 384-core OPGW optical cable, it is difficult to distinguish the large number of cores by using the traditional color ring method. It takes a long time to manually distinguish the optical fiber in the later detection and construction welding stage. The industry uses color ring optical fiber to increase the types of colored optical fiber to increase the number of optical unit cores. In the actual production process, color ring optical fiber will have quality problems such as incomplete ring, shallow color ring, difficult to distinguish, and excessive additional attenuation of optical fiber.

[0004] In addition, the current method of increasing optical fiber capacity is mainly through increasing the number of optical fiber units, enlarging the overall structural dimensions of the optical cable, and further increasing the cross-sectional area and unit weight of the optical cable. It is necessary to recalculate the tension and sag performance, and accordingly, it is necessary to reinforce the tower head or replace the pole tower to achieve the safe installation of large-core optical cables, which increases the cost of line construction and the difficulty of construction. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a 384-core layer twisted OPGW optical cable to solve the problem of optical fiber distinction of a large-core-number OPGW optical cable.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A 384-core twisted OPGW optical cable comprises a central aluminum-clad steel wire, a plurality of outer aluminum-clad steel wires, a plurality of optical units and a plurality of aluminum alloy wires. The plurality of outer aluminum-clad steel wires and the plurality of optical units are twisted on the outside of the central aluminum-clad steel wire to form a middle layer. The plurality of aluminum alloy wires are twisted on the outside of the middle layer. The optical units comprise a plurality of optical fiber bundles and a stainless steel tube. The plurality of optical fiber bundles are arranged on the inside of the stainless steel tube. The outside of each optical fiber bundle in the stainless steel tube is wrapped with yarns of different colors.

[0008] Furthermore, the yarn is degradable yarn.

[0009] Furthermore, the number of optical fiber cores in each optical fiber bundle is 24 or 48 cores.

[0010] Furthermore, the stainless steel tube is filled with fiber paste.

[0011] Furthermore, an inner coating layer and an outer coating layer are arranged on the outer side of the optical fiber in the optical fiber bundle, and the outer coating layer is located on the outer side of the inner coating layer, wherein the thickness ratio of the inner coating layer to the outer coating layer is 0.8-1.2.

[0012] Furthermore, the diameter of the inner coating layer is 150-165 μm, and the diameter of the outer coating layer is 175-195 μm.

[0013] Furthermore, there are two outer aluminum clad steel wires and four optical units, the two outer aluminum clad steel wires and the central aluminum clad steel wire are located on the same straight line, the optical units are divided into two groups, and the two groups of optical units are symmetrically arranged on both sides of the straight line formed by the two outer aluminum clad steel wires and the central aluminum clad steel wire.

[0014] Furthermore, the outer diameter of the optical unit is 3.9 mm, the outer diameters of the central aluminum-clad steel wire and the outer aluminum-clad steel wire are 3.9 mm, and the outer diameter of the aluminum alloy wire is less than 3.9 mm.

[0015] Furthermore, the central aluminum clad steel wire and the outer aluminum clad steel wire are aluminum clad steel wires with a model of 20.3% IACS or 27% IACS.

[0016] Furthermore, the aluminum alloy wire is an aluminum alloy wire of model LHA1 or LHA2.

[0017] Compared with the prior art, the utility model has the following advantages and effects:

[0018] 1. The utility model adopts a color yarn binding marking scheme to solve the problem of optical fiber differentiation of large-core OPGW optical cables. The yarn binding process can be carried out simultaneously with the colored optical fiber to form a tube, reducing the optical fiber loop manufacturing process and reducing the risk of abnormal attenuation caused by too dense color rings;

[0019] 2. The utility model optimizes the OPGW structure and designs small-diameter optical fibers without increasing the outer diameter of the OPGW optical cable and the line construction cost. The outer diameter of the optical cable remains unchanged when the number of optical fiber cores increases. The outer layer is twisted with aluminum alloy wires. The OPGW optical cable designed with an outer layer of aluminum alloy is lighter, and the lightweight design helps to reduce the load on the tower and the supporting structure.

[0020] 3. The OPGW optical cable of the utility model has an outer diameter reduced by more than 8% and a unit weight reduced by more than 15% compared with the conventional 384-core OPGW optical cable, and the symmetrical twisted structure has a more balanced force, so that the line maintains a sufficiently low attenuation level. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of a 384-core layer twisted OPGW optical cable of the utility model.

[0022] Figure 2 It is a schematic diagram of the light unit of the utility model.

[0023] Figure 3 It is a schematic diagram of the optical fiber bundle of the utility model. DETAILED DESCRIPTION

[0024] In order to elaborate on the technical scheme adopted by the utility model to achieve the predetermined technical purpose, the technical scheme in the embodiment of the utility model will be clearly and completely described in combination with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a partial embodiment of the utility model, not all of the embodiments, and the technical means or technical features in the embodiment of the utility model can be replaced without paying creative labor. The utility model will be described in detail with reference to the drawings and in combination with the embodiments.

[0025] like Figure 1 As shown, a 384 core layer twisted OPGW optical cable of the utility model comprises a central aluminum clad steel wire 1, a plurality of outer aluminum clad steel wires 2, a plurality of optical units 3 and a plurality of aluminum alloy wires 4. The plurality of outer aluminum clad steel wires 2 and the plurality of optical units 3 are twisted on the outside of the central aluminum clad steel wire 1 to form a middle layer, and the plurality of aluminum alloy wires 4 are twisted on the outside of the middle layer. Figure 2 and Figure 3 As shown, the optical unit 3 includes a plurality of optical fiber bundles 5 and a stainless steel tube 6 . The plurality of optical fiber bundles 5 are arranged inside the stainless steel tube 6 . The outer side of each optical fiber bundle 5 in the stainless steel tube 6 is wrapped with yarns 7 of different colors.

[0026] The yarn 7 is made of degradable yarn. The degradable yarn has a long service life and rich colors. It is wound around the outside of the optical fiber bundle 5 within a certain pitch range. The color line yarn binding process replaces the traditional optical fiber looping process to distinguish the optical fiber bundles, avoiding the high risk of attenuation of the optical fiber due to the looping process. Moreover, the production efficiency of the color line yarn binding process is much higher than that of the optical fiber looping, and it can also improve the overall production efficiency of the optical cable compared to the existing technology. Finally, the color line yarn binding has rich colors and can quickly distinguish optical fiber bundles 5 of different colors. After the OPGW optical cable is stripped, it can quickly distinguish different groups of optical fiber bundles within 1 minute, and the operation is convenient and fast.

[0027] The number of optical fiber cores in each optical fiber bundle 5 is 24 or 48 cores, and the total fiber capacity in one optical unit 3 can meet at least 96 cores. After the entire OPGW optical cable is cabled, the number of optical fiber cores reaches 384 cores.

[0028] The stainless steel tube 6 is filled with fiber paste.

[0029] An inner coating layer and an outer coating layer are provided on the outer side of the optical fiber in the optical fiber bundle 5, and the outer coating layer is located on the outer side of the inner coating layer, wherein the thickness ratio of the inner coating layer to the outer coating layer is 0.8-1.2. Preferably, the diameter of the inner coating layer is 150-165μm, and the diameter of the outer coating layer is 175-195μm. Before use, the coating materials of the outer coating layer and the inner coating layer need to be filtered through a molecular sieve of ≤5μm, and then the coating is dried at 45-60°C for 8-24 hours. In this way, the prepared optical fiber has low attenuation characteristics, @1310nm≤0.32dB / km, @1550nm≤0.184dB / km, and has good anti-microbending characteristics. The additional attenuation of the optical fiber after cabling is ≤0.001dB / km, and by adopting this type of optical fiber comprehensive design, the outer diameter of the stainless steel tube optical unit can be reduced by 8%.

[0030] There are two outer aluminum clad steel wires 2 and four optical units 3. The two outer aluminum clad steel wires 2 and the central aluminum clad steel wire 1 are located on the same straight line. The optical units 3 are divided into two groups, and the two groups of optical units 3 are symmetrically arranged on both sides of the straight line formed by the two outer aluminum clad steel wires 2 and the central aluminum clad steel wire 1. The 382-core layer-twisted OPGE optical cable of the utility model adopts a layer-twisted symmetrical twisted structure design, so that the optical cable is subjected to balanced force during twisting and use, ensuring that the line communication maintains a sufficiently low attenuation level.

[0031] The outer diameter of the optical unit 3 is 3.9 mm, the outer diameter of the central aluminum-clad steel wire 1 and the outer aluminum-clad steel wire 2 is 3.9 mm, and the outer diameter of the aluminum alloy wire 4 is less than 3.9 mm. The outermost layer uses aluminum alloy wire, which reduces the diameter of the outer layer stranded wire, and the overall outer diameter of the optical cable can be reduced by 10%, and the excess length of the optical cable is not less than 6.5‰.

[0032] The central aluminum clad steel wire 1 and the outer aluminum clad steel wire 2 are aluminum clad steel wires with a type of 20.3%IACS or 27%IACS.

[0033] The aluminum alloy wire 4 is an aluminum alloy wire of type LHA1 or LHA2.

[0034] The utility model adopts a color yarn binding marking scheme to solve the problem of optical fiber differentiation of a large number of cores in OPGW optical cables. The binding process can be carried out simultaneously with the colored optical fiber to form a tube, reducing the optical fiber looping manufacturing process and reducing the risk of abnormal attenuation caused by too dense color rings. The utility model optimizes the OPGW structure and designs small-diameter optical fibers without increasing the outer diameter of the OPGW optical cable and the line construction cost. The outer diameter of the optical cable remains unchanged when the number of optical fiber cores increases. The outer layer is twisted with aluminum alloy wires, and the OPGW optical cable designed with aluminum alloy outer layer is lighter. The lightweight design helps to reduce the load on poles and supporting structures. The OPGW optical cable of the utility model reduces the outer diameter by more than 8% and the unit weight by more than 15% compared with the conventional 384-core OPGW optical cable, and the symmetrical twisted structure is more balanced in force, so that the line maintains a sufficiently low attenuation level.

[0035] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent replacement and improvement of the above embodiments made according to the technical essence of the present invention, within the spirit and principles of the present invention, without departing from the content of the technical solution of the present invention, still fall within the protection scope of the technical solution of the present invention.

Claims

1. A 384-core stranded OPGW optical cable, characterized in that: It includes a central aluminum clad steel wire, a plurality of outer aluminum clad steel wires, a plurality of optical units and a plurality of aluminum alloy wires. The plurality of outer aluminum clad steel wires and the plurality of optical units are twisted on the outside of the central aluminum clad steel wire to form a middle layer. The plurality of aluminum alloy wires are twisted on the outside of the middle layer. The optical units include a plurality of optical fiber bundles and a stainless steel tube. The plurality of optical fiber bundles are arranged on the inside of the stainless steel tube. The outside of each optical fiber bundle in the stainless steel tube is wrapped with yarns of different colors.

2. The 384-core stranded OPGW optical cable according to claim 1, characterized in that: The yarn is degradable yarn.

3. The 384-core stranded OPGW optical cable according to claim 1, characterized in that: The number of optical fiber cores in each optical fiber bundle is 24 or 48.

4. The 384-core stranded OPGW optical cable according to claim 1, characterized in that: The stainless steel tube is filled with fiber paste.

5. The 384-core stranded OPGW optical cable according to claim 1, characterized in that: An inner coating layer and an outer coating layer are arranged on the outer side of the optical fiber in the optical fiber bundle, and the outer coating layer is located on the outer side of the inner coating layer, wherein the thickness ratio of the inner coating layer to the outer coating layer is 0.8-1.

2.

6. The 384-core stranded OPGW optical cable according to claim 5, characterized in that: The inner coating layer has a diameter of 150-165 μm, and the outer coating layer has a diameter of 175-195 μm.

7. The 384-core stranded OPGW optical cable according to claim 1, characterized in that: There are two outer aluminum clad steel wires and four optical units. The two outer aluminum clad steel wires and the central aluminum clad steel wire are located on the same straight line. The optical units are divided into two groups, and the two groups of optical units are symmetrically arranged on both sides of the straight line formed by the two outer aluminum clad steel wires and the central aluminum clad steel wire.

8. The 384-core stranded OPGW optical cable according to claim 7, characterized in that: The outer diameter of the optical unit is 3.9 mm, the outer diameters of the central aluminum-clad steel wire and the outer aluminum-clad steel wire are 3.9 mm, and the outer diameter of the aluminum alloy wire is less than 3.9 mm.

9. The 384-core stranded OPGW optical cable according to claim 1, characterized in that: The central aluminum clad steel wire and the outer aluminum clad steel wire are aluminum clad steel wires with a model of 20.3%IACS or 27%IACS.

10. The 384-core stranded OPGW optical cable according to claim 1, characterized in that: The aluminum alloy wire is an aluminum alloy wire of model LHA1 or LHA2.

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