Molded wire stranded aluminum alloy conductor optical fiber composite cable

Abstract

The utility model relates to the technical field of power cables, in particular to a molded line stranded aluminum alloy conductor optical fiber composite cable which comprises a plurality of power line cores which are tangent in pairs and stranded with one another, and heat dissipation channels are formed in the inner sides of the N power line cores. The heat conduction layer is filled in the heat dissipation channel and forms a preset shape; and the foaming filling layer is filled at the outer sides of the two adjacent power wire cores and is wrapped and fixed by a wrapping layer to form a cable core with a circular cross section. The distribution positions of the wire cores and the optical fibers and the heat dissipation channels of the optical fibers are improved, and heat generated by the power wire cores can be transmitted to the outside of the cable by avoiding the positions of the optical fibers through the first heat conduction channels of the inner sheath, the shielding layer and the outer sheath; and the heat dissipation channel on the inner side of the conductor can be used as a second heat conduction channel to transmit along the axis of the cable, so that the temperature of the environment where the optical fiber unit is located can be effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of power cable technology, and more specifically to a composite cable with stranded aluminum alloy conductor and optical fiber. Background Technology

[0002] Optoelectronic composite cables transmit both optical and electrical signals simultaneously, achieving integrated power and signal transmission. In their conductive structure, optical fibers and cables are combined into one, saving installation space and cost. The internal design of these cables includes optical fibers for transmitting optical signals and metal / alloy cores for conducting electrical energy.

[0003] When a power transmission line with a rated voltage of 0.6 / 1kV is operating normally, the heat generated by the transmission of electrical energy in the power conductors causes the cable temperature to rise. Under normal circumstances, the temperature of metallic or alloy conductors (copper alloys, aluminum alloys, etc.) remains around 50℃. However, the instantaneous temperature rise caused by overload or short circuit can reach 80℃ or even higher. In contrast, the maximum long-term operating temperature of conventional optical fibers in optical units needs to be kept below 70℃. The temperature rise of the power unit will adversely affect the optical transmission of the optical fiber.

[0004] On the one hand, increased temperature in optoelectronic composite cables alters the attenuation characteristics of the optical fiber, leading to increased optical signal loss during transmission. This reduces transmission quality and stability, impacting communication reliability and accuracy. Particularly when the cable operating temperature exceeds 60°C, the core refractive index change rate can reach 0.8% / °C, causing optical signal attenuation to rise above 3 dB / km. On the other hand, temperature changes can also cause thermal expansion of the optical fiber, resulting in slight changes in its geometry. This affects the optical signal transmission mode and coupling efficiency, further deteriorating transmission performance. Furthermore, prolonged exposure to high temperatures accelerates fiber optic material aging, shortens fiber lifespan, and increases maintenance costs and safety hazards.

[0005] In existing technologies, such as the optoelectronic composite cable frame control cable proposed in publication number CN116403764A, the optical fiber unit is either twisted together with the power conductor core or arranged outside the cable core, but neither can effectively suppress the temperature influence of the power unit on the optical fiber unit. Therefore, how to effectively solve the impact of the temperature rise of the power unit on the optical fiber in the optoelectronic composite cable has become an urgent technical problem to be solved. Summary of the Invention

[0006] To address the technical problems existing in existing power cables, the first aspect of this invention proposes a stranded aluminum alloy conductor optical fiber composite cable, comprising:

[0007] N power wire cores that are tangent to each other and twisted together, with heat dissipation channels formed on the inner side of the N power wire cores;

[0008] A heat-conducting layer of a predetermined shape is filled within the heat dissipation channel;

[0009] A foamed filler layer is filled on the outside of two adjacent power conductors and the cable core with a circular cross-section is wrapped and secured by a wrapping layer.

[0010] An inner sheath layer is extruded onto the outer wall of the cable core, and the surface of the inner sheath layer is provided with grooves.

[0011] An optical fiber unit is disposed in the groove;

[0012] A shielding layer that covers the outer wall of the inner sheath layer;

[0013] The outer sheath layer is extruded onto the outer wall of the shielding layer;

[0014] The inner sheath layer is divided into several regions along the cross-sectional direction of the cable, including N first regions and N second regions. Along the axial direction of the cable, the first region or the second region is set as a strip and is distributed in a spiral shape around the axis of the cable.

[0015] In the cross-sectional direction of the cable, the first region corresponds to the position of the power conductor, the second region corresponds to the gap between two adjacent power conductors, the thermal conductivity of the inner sheath layer in the first region is greater than that in the second region, and the groove is disposed in the second region of the inner sheath layer.

[0016] Preferably, along the cross-sectional direction of the cable, the arc length corresponding to the first region is L1, and the arc length corresponding to the second region is L2, wherein L1 / L2 = 4 / 6~5 / 5.

[0017] Preferably, the first region of the inner sheath layer is provided with thermally conductive filler, and the first and second regions of the inner sheath layer are extruded by co-extrusion.

[0018] Preferably, the thermally conductive filler in the first region is configured such that the content near the center of the first region is higher than the content on both sides of the first region.

[0019] Preferably, each of the second regions is provided with at least one groove, and the length of the groove is greater than the length of the second region.

[0020] Preferably, the groove is arranged in the second region along a trajectory that periodically approaches the edges of the first and second sides of the second region.

[0021] Preferably, the width of the second region is defined as W, and the maximum span of the groove along the width direction of the second region is no more than 0.6W.

[0022] Preferably, the power conductor core includes a circular stranded conductor, a sector stranded conductor, and an insulation layer. Semiconductor water-resistant tape is provided between the circular stranded conductor and the sector stranded conductor, and between the sector stranded conductor and the insulation layer. Double-sided water-resistant tape is filled between each sector strand in the sector stranded conductor.

[0023] Preferably, the shielding layer includes a longitudinally wrapped metal strip shielding layer, a braided shielding layer, and a non-woven fabric wrapping layer distributed from the inside out. The longitudinally wrapped metal strip shielding layer includes a longitudinally wrapped copper-plastic composite strip, and the braided shielding layer includes a fine copper wire braided shielding layer with a braiding density greater than 85%.

[0024] Based on the above technical solutions, the significant advantages of the stranded aluminum alloy conductor optical fiber composite cable of the present invention are as follows:

[0025] In the design of the stranded aluminum alloy conductor optical fiber composite cable of the present invention, the distribution positions of the conductor core and optical fiber, as well as the heat dissipation channel of the optical fiber, are improved. The heat generated by the power conductor core can be transferred to the outside of the cable through the first heat conduction channel of the inner sheath, shielding layer and outer sheath, avoiding the location of the optical fiber. Alternatively, it can be transferred along the cable axis through the heat dissipation channel on the inner side of the conductor as the second heat conduction channel. This can effectively reduce the temperature of the environment in which the optical fiber unit is located, reduce the impact of temperature on the optical fiber performance, ensure stable transmission of optical signals, and slow down the aging rate of the optical fiber material, thereby extending the service life of the optical fiber and reducing maintenance costs and replacement frequency. Attached Figure Description

[0026] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component shown in the various figures may be denoted by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the invention will now be described by way of example and with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the structure of the fiber optic composite cable with stranded aluminum alloy conductors as shown in this invention.

[0028] Figure 2 This is a schematic diagram of the cross-sectional structure of the stranded aluminum alloy conductor optical fiber composite cable of the present invention.

[0029] Figure 3 This is a schematic diagram of the structure of the power conductor shown in this invention.

[0030] Figure 4 This is a schematic diagram of heat transfer within the cross-sectional direction of the cable as shown in this invention.

[0031] Figure 5 This is a schematic diagram showing the distribution of the grooves on the surface of the second region as described in this invention. Detailed Implementation

[0032] To better understand the technical content of the present invention, specific embodiments are described below in conjunction with the accompanying drawings.

[0033] Stranded aluminum alloy conductor fiber optic composite cable

[0034] Combination Figure 1 and Figure 2 As shown, the first aspect embodiment of the present invention includes a stranded aluminum alloy conductor optical fiber composite cable, comprising a cable core, an inner sheath layer 4, an optical fiber unit 5, a shielding layer, and an outer sheath layer 9.

[0035] In an embodiment of the present invention, the optical fiber unit 5 and the power unit are separated by the inner sheath layer 4. The power unit is located inside the cable core, and the optical fiber unit 5 is located outside the cable core, so that the distance between the power unit and the optical fiber unit 5 is greater, so as to avoid the heat generated by the power unit from affecting the optical fiber unit 5.

[0036] Combination Figure 1 and Figure 2 As shown, N power conductor cores 2 are tangentially twisted together. A heat dissipation channel is formed inside each of the N power conductor cores 2, and a heat-conducting medium is filled within the heat dissipation channel to form a heat-conducting layer 1 of a predetermined shape. Here, N is a positive integer greater than or equal to 4. In this embodiment of the invention, four power conductor cores are used as an example for illustration.

[0037] In an optional embodiment, combined with Figure 3 As shown, the power conductor core 2 includes a circular stranded conductor 21, a sector stranded conductor 22, and an insulation layer 25. Semiconductor water-resistant tape 24 is provided between the circular stranded conductor 21 and the sector stranded conductor 22, and between the sector stranded conductor 22 and the insulation layer 25. Double-sided water-resistant tape 23 is filled between each sector strand in the sector stranded conductor 22.

[0038] Specifically, the circular stranded conductor 21 is formed by stranding 8000 series circular aluminum alloy conductors, and the fan-shaped stranded conductor 22 is formed by stranding 8000 series fan-shaped aluminum alloy conductors. The fan-shaped stranded conductor 22 improves the cable's fill rate and also facilitates heat dissipation of the conductor.

[0039] In an optional embodiment, the insulation layer 25 is a cross-linked polyethylene insulation layer.

[0040] In optional embodiments, the thermally conductive medium can be thermally conductive grease or thermally conductive silicone grease, which can block water and transfer heat along the cable axis, avoid local high temperature, and make the heat more evenly distributed in the axial direction of the cable.

[0041] Furthermore, the foam filling layer 3 fills the outside of two adjacent power conductor cores 2, and is wrapped and solidified by the wrapping layer around the cable core with a circular cross-section.

[0042] In an optional embodiment, a double layer of polyester tape is used to form the wrapping layer. The polyester tape wrapping structure has good tensile strength and flexibility, making the cable easy to bend and adapting to a smaller bending laying environment.

[0043] Furthermore, the inner sheath layer 4 is extruded onto the outer wall of the cable core, and the surface of the inner sheath layer 4 is provided with a groove 41. The optical fiber unit 5 is disposed in the groove 41.

[0044] In an optional embodiment, the foamed filler layer 3 is made of silicone rubber foam strip, which has both elasticity and water resistance, as well as a certain compressive strength, to support the cable.

[0045] Thus, the optical fiber unit 5 and the power line core 2 are separated into different enclosed spaces by the inner sheath layer 4, and the foam filling layer can form a heat transfer barrier between the optical fiber unit 5 and the power line core 2.

[0046] In an optional embodiment, combined with Figure 4 and Figure 5 As shown, the inner sheath layer 4 is divided into several regions along the cross-sectional direction of the cable, including N first regions 401 and N second regions 402. Along the axial direction of the cable, the first regions 401 or the second regions 402 are set in strip shape and distributed in a spiral shape around the axis of the cable.

[0047] Furthermore, in the cross-sectional direction of the cable, the first region 401 corresponds to the position of the power conductor 2, and the second region 402 corresponds to the gap between two adjacent power conductors 2. The thermal conductivity of the inner sheath layer 4 in the first region 401 is greater than that in the second region 402, and the groove 41 is provided in the second region 402 of the inner sheath layer 4.

[0048] Thus, the inner sheath layer 4 is designed to have better thermal conductivity in one part than another. That is, the thermal conductivity of the first region 401 corresponding to the distribution of the power line core 2 is higher than that of the second region corresponding to the distribution of the gaps in the power line core 2. Therefore, the heat generated by the power line core 2 can be conducted to the outside through the first region 401, while the second region 402 where the optical fiber unit 5 is arranged has a relatively lower temperature. Therefore, the impact of the heat from the power line core 2 on the optical fiber unit 5 can be reduced.

[0049] In the above embodiments, the first region 401 of the inner sheath layer 4 is provided with thermally conductive filler, and the first region 401 and the second region 402 of the inner sheath layer 4 are extruded by co-extrusion.

[0050] Thus, by setting thermally conductive fillers in local areas, the first region 401 and the second region 402 of the inner sheath layer 4 have different thermal conductivity characteristics.

[0051] In a preferred embodiment, the thermally conductive filler in the first region 401 is configured such that the content near the central portion of the first region 401 is higher than the content on both sides of the first region 401.

[0052] In this way, by controlling the distribution gradient of thermally conductive filler in the material, the filler concentration is high in the middle region, i.e., the thermal conductivity is high, and it gradually decreases towards both sides, i.e. the thermal conductivity decreases, forming a smooth transition interface layer, reducing the thermal stress difference and mechanical stress concentration between materials, and also inhibiting the transfer of heat from the first region 401 to the second region 402.

[0053] As mentioned above, by optimizing the thermal compatibility of the material bonding interface, interface delamination or cracks caused by abrupt changes in thermal conductivity can be avoided, while improving the elasticity and durability of the overall structure.

[0054] In an optional embodiment, the inner sheath layer 4 can be a ceramicized silicone rubber or a nitrile rubber inner sheath. High thermal conductivity fillers such as aluminum nitride and silicon carbide can be added to the ceramicized silicone rubber to improve thermal conductivity without affecting elasticity and ceramicization characteristics. The nitrile rubber can be filled with thermally conductive carbon black or graphite as thermally conductive fillers.

[0055] Specifically, in combination Figure 4 As shown, taking four power conductor cores 2 as an example, the four power conductor cores 2 are twisted together, and a cross-shaped heat dissipation channel is formed in the direction of the connection of the four power conductor cores 2 in the cross-sectional direction. The first region 401 is arranged in the extension direction of the connection between the power conductor core 2 and the cable axis, that is, the heat is transferred from the power conductor core 2 - the first region 401 - the shielding layer - the outer sheath layer 9 to the outside of the cable.

[0056] In an optional embodiment, along the cross-sectional direction of the cable, the arc length corresponding to the first region 401 is L1, and the arc length corresponding to the second region 402 is L2, wherein L1 / L2 = 4 / 6 to 5 / 5.

[0057] Thus, by controlling the lengths of the first region 401 and the second region 402, heat can be transferred through the first region 401 as much as possible, while the region where the optical fiber unit 5 is located has a lower temperature than the first region 401.

[0058] Combination Figure 4 As shown, three grooves 41 are provided in the second region 402, and the optical fiber unit 5 is preferably arranged in the middle groove 41. In this way, the grooves on both sides can act as heat transfer barriers and stress transfer barriers, so that the optical fiber unit 5 has a better operating environment.

[0059] Furthermore, each second region 402 is provided with at least one groove 41, and the length of the groove 41 is greater than the length of the second region 402. In this way, when the cable is bent or stretched, the longer fiber unit 5 can reduce tensile stress and bending stress, thus avoiding mechanical damage.

[0060] Combination Figure 5 As shown, the groove 41 is arranged in the second region 402 along a trajectory that periodically approaches the edges of the first and second sides of the second region 402. In this way, the fiber optic unit 5 can be distributed in a wave-like pattern in the second region 402. When the cable is twisted, bent, or under pressure, the fiber optic unit 5 can avoid being damaged by excessive bending or stretching stress. At the same time, through the thermal isolation structure, the fiber optic unit 5 can maintain high-performance signal transmission function for a long time and delay fiber aging and performance degradation.

[0061] The width of the second region 402 is defined as W, and the maximum span of the groove 41 along the width direction of the second region 402 is no more than 0.6W.

[0062] Thus, by increasing the distance between the optical fiber unit 5 and the first region 401, the optical fiber unit 5 is further protected from the heat in the first region 401.

[0063] Furthermore, the shielding layer covers the outer wall of the inner sheath layer 4.

[0064] In an optional embodiment, the shielding layer includes a longitudinally wrapped metal strip shielding layer 6, a braided shielding layer 7, and a non-woven fabric wrapping layer 8 distributed from the inside out. The longitudinally wrapped metal strip shielding layer 6 includes a longitudinally wrapped copper-plastic composite strip, and the braided shielding layer 7 includes a fine copper wire braided shielding layer with a braiding density greater than 85%.

[0065] In this way, the combination of longitudinally wrapped metal strips and fine copper wire braided shielding layer can provide a continuous shielding layer, effectively blocking external electromagnetic interference. The braided structure further enhances the shielding effect, effectively suppressing electromagnetic interference inside and outside the cable, and ensuring signal transmission quality. At the same time, the non-woven fabric wrapping layer is placed on the outer layer of the braided shielding, which can improve the tensile strength of the cable and the water resistance of the shielding layer, while also preventing the fine copper wires of the braid from directly contacting the sheath.

[0066] Furthermore, the outer sheath layer 9 is extruded onto the outer wall of the shielding layer.

[0067] In an optional embodiment, the outer sheath layer 9 is made of thermoplastic polyurethane elastic sheath. The TPU sheath can maintain good stability under the influence of environmental factors such as ultraviolet rays, oxidation and high temperature, and is not prone to aging, thus having a long service life.

[0068] [Preparation method of fiber optic composite cable with stranded aluminum alloy conductor]

[0069] The second aspect of this invention provides a technical solution: a method for preparing a stranded aluminum alloy conductor optical fiber composite cable as described above, comprising the following steps:

[0070] Step 1, Prepare power conductor core 2:

[0071] Step 11: Use round aluminum alloy wires to twist leftward in a 1+6 pattern to form a round stranded conductor 21;

[0072] Step 12: Wrap a semiconducting resistive water tape around the surface of the circular stranded conductor 21 to form an inner conductor;

[0073] Step 13: Use fan-shaped aluminum alloy wire and double-sided water-blocking tape to twist together on the outside of the inner conductor to form the outer conductor;

[0074] Step 14: Wrap a semiconducting resistive water tape around the outside of the outer conductor;

[0075] Step 15: Extruding an insulating layer 25 onto the outer layer of the semiconducting resistive water tape to form the power conductor core 2;

[0076] Step 2, Cable stranding:

[0077] Step 21: Arrange multiple foam strips on the outside of the power wire core 2 and twist them together with the multiple power wire core 2. At the same time, fill the heat dissipation channel formed on the inside after the multiple power wire core 2 are twisted together with a heat-conducting medium.

[0078] Step 22: Use wrapping tape to wrap the twisted foam strip and power wire core 2 together to form a cable;

[0079] Step 3, Extrusion of the inner sheath layer 4:

[0080] Step 31: Use a dual-channel co-extrusion die to extrude the first region 401 and the second region 402 of the inner sheath layer 4 at the die head. While extruding, control the die head to rotate so that the first region 401 formed by extrusion corresponds to the position of the power wire core 2. At the same time, through the periodic oscillation of the plug on the die head, a groove 41 is formed on the surface of the second region 402.

[0081] Step 32: Cool the extruded inner sheath layer 4;

[0082] Step 4: Press the fiber unit 5 into the groove 41;

[0083] Step 5: A longitudinally wrapped metal strip shielding layer 6 is formed on the outer layer of the inner sheath layer 4. Fine copper wires are then woven around the longitudinally wrapped metal strip shielding layer 6 to form a braided shielding layer 7. Double layers of non-woven fabric are wrapped around the outer wall of the braided shielding layer 7 to form a non-woven fabric wrapping layer 8.

[0084] Step 6: Extrude a thermoplastic polyurethane elastic sheath onto the outer wall of the nonwoven fabric wrapping layer 8 to form the outer sheath layer 9.

[0085] In the above embodiments, for the co-extrusion process of the inner sheath layer 4, the die head of the dual-channel co-extrusion die has eight extrusion cavities, corresponding to four first regions 401 and four second regions 402 respectively. The four extrusion cavities corresponding to the first regions 401 are connected to the first channel of the extruder, and the extrusion cavities corresponding to the four second regions 402 are connected to the second channel of the extruder.

[0086] Taking ceramicized silicone rubber as an example, the ceramicized silicone rubber matrix is ​​heated to a molten state by a screw extruder. No thermally conductive filler is added to the second flow channel. A middle filling channel and two side filling channels are set in the first flow channel. The middle filling channel is injected with a high concentration of thermally conductive filler, and the side filling channels are injected with a low concentration of thermally conductive filler. A gradient distribution is formed by the flow in the first flow channel. Finally, the inner sheath structure of the first region 401 and the second region 402 is formed by extrusion at the die head.

[0087] The die head is equipped with a periodically oscillating plug, which causes the surface of the second region 402 to form a wave-shaped groove 41.

[0088] Furthermore, the rotational speed of the entire die head is matched with the stranding pitch of the wire core, calculated using the formula: N=V 绞合 / P 节距 .

[0089] Where N is the mold rotation speed (r / min), V 绞合 P is the twisting traction speed (m / min). 节距 The pitch is the twist pitch (m / r).

[0090] Specifically, a servo motor is used to drive the mold rotation, and an encoder monitors the traction speed and pitch of the wire stranding equipment in real time and feeds it back to the mold rotation control system to achieve dynamic matching.

[0091] In conjunction with the above embodiments, this application improves the distribution of the conductor core and optical fiber, as well as the heat dissipation channel of the optical fiber. The heat generated by the power conductor core can be transferred to the outside of the cable through the first heat conduction channel of the inner sheath, shielding layer, and outer sheath, bypassing the location of the optical fiber. Alternatively, it can be transferred along the cable axis through the heat dissipation channel on the inner side of the conductor as a second heat conduction channel. This can effectively reduce the temperature of the environment where the optical fiber unit is located, reduce the impact of temperature on the optical fiber performance, ensure stable transmission of optical signals, and slow down the aging rate of the optical fiber material, thereby extending the service life of the optical fiber and reducing maintenance costs and replacement frequency.

[0092] Furthermore, the synergistic effect of the first and second channels allows for more effective heat dissipation from the power conductors, reducing the internal temperature of the cable. Lower temperatures reduce heat loss, improve power transmission efficiency, and lower energy consumption. This also mitigates risks such as insulation degradation, ensuring the cable's reliability during long-term operation.

[0093] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention shall be determined by the claims.

Claims

1. A profiled stranded aluminum alloy conductor fiber optic cable characterized by, The cable comprises: N power line cores (2) that are tangent to each other and twisted with each other, and a heat dissipation channel is formed inside the N power line cores (2); N is a positive integer greater than or equal to 4; A heat-conducting layer (1) filled in the heat dissipation channel and forming a predetermined shape; A foamed filling layer (3) filled outside two adjacent power line cores (2) and formed by a cable core wrapped by a round cross-section cable core wrapped by a wrapping layer; An inner sheath layer (4) extruded on the outer wall of the cable core, and a groove (41) is arranged on the surface of the inner sheath layer (4); An optical fiber unit (5) arranged in the groove (41); A shielding layer wrapped on the outer wall of the inner sheath layer (4); An outer sheath layer (9) extruded on the outer wall of the shielding layer; The inner sheath layer (4) is divided into a plurality of regions in the cable cross-sectional direction, including N first regions (401) and N second regions (402), and the first regions (401) or the second regions (402) are arranged in a strip shape and distributed in a spiral shape along the axis of the cable. In the cable cross-sectional direction, the first regions (401) correspond to the positions of the power line cores (2), and the second regions (402) correspond to the gaps between the adjacent two power line cores (2), the heat conduction performance of the inner sheath layer (4) in the first regions (401) is greater than that in the second regions (402), and the groove (41) is arranged in the second regions (402) of the inner sheath layer (4).

2. The profile stranded aluminum alloy conductor fiber optic cable of claim 1, wherein, In the cable cross-sectional direction, the arc length corresponding to the first regions (401) is L1, and the arc length corresponding to the second regions (402) is L2, wherein L1 / L2=4 / 6~5 / 5.

3. The profile stranded aluminum alloy conductor fiber optic cable of claim 1, wherein, The first regions (401) of the inner sheath layer (4) are provided with heat-conducting fillers, and the first regions (401) and the second regions (402) of the inner sheath layer (4) are extruded by co-extrusion.

4. The profile stranded aluminum alloy conductor fiber optic cable of claim 3, wherein, The heat-conducting fillers in the first regions (401) are arranged to have a higher content near the central part of the first regions (401) than the content on both sides of the first regions (401).

5. The profiled strand aluminum alloy conductor fiber optic cable of claim 1, wherein, Each of the second regions (402) is provided with at least one groove (41), and the length of the groove (41) is greater than the length of the second region (402).

6. The profile stranded aluminum alloy conductor fiber optic cable of claim 5, wherein, The groove (41) is arranged along a track periodically close to the first side and the second side edge of the second region (402).

7. The profile stranded aluminum alloy conductor fiber optic cable of claim 6, wherein, The width of the second region (402) is defined as W, and the span of the groove (41) in the width direction of the second region (402) is not more than 0.6W.

8. The profile strand aluminum alloy conductor fiber optic cable of claim 1, wherein, The power line core (2) comprises a circular twisted conductor (21), a fan-shaped twisted conductor (22), and an insulating layer (25), and a semi-conductive water-blocking tape (24) is arranged between the circular twisted conductor (21) and the fan-shaped twisted conductor (22) and between the fan-shaped twisted conductor (22) and the insulating layer (25), and a double-sided water-blocking tape (23) is filled between each fan-shaped strand in the fan-shaped twisted conductor (22).

9. The profile strand aluminum alloy conductor fiber optic cable of claim 1, wherein, The shielding layer comprises a longitudinal metal strip shielding layer (6), a woven shielding layer (7) and a non-woven fabric wrapping layer (8) distributed from inside to outside.

10. The profile stranded aluminum alloy conductor fiber optic cable of claim 9, wherein, The longitudinal metal strip shielding layer (6) comprises a longitudinal copper plastic composite strip. The woven shielding layer (7) comprises a fine copper wire woven shielding layer, and the weaving density is greater than 85%.

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