Cable structure and manufacturing method thereof

Abstract

The invention relates to a cable structure and a manufacturing method thereof, the cable structure comprises a cable conductor, and the cable conductor comprises a center line and an external conductor wrapping the center line; the center line comprises an optical fiber, a conductor tube and a stranded wire; the optical fiber is arranged in the conductor tube in a penetrating mode, and the conductor tube is wrapped with the stranded wire. Thus, the optical fiber can be prevented from being damaged and even broken in the using process, the temperature of the cable conductor can be accurately monitored through the optical fiber, the safety and reliability of the cable structure are improved, meanwhile, the mechanical performance and the current-carrying capacity of the cable structure can be guaranteed, and the cable structure can provide support for safe operation of a power system; in addition, the manufacturing cost of the cable structure can be reduced, the weight of the cable structure is reduced, and the cable structure is convenient to install.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power cable, in particular to a cable structure and a manufacturing method thereof. BACKGROUND

[0002] In modern power transmission systems, as the key carrier of electric energy transmission, the safe, stable and efficient operation of power cables is of great importance. With the rapid development of economy and the continuous growth of social electricity demand, power cables need to carry larger current and higher voltage, which puts forward strict requirements on the operation state monitoring.

[0003] Currently, traditional power cables have many limitations when dealing with complex operating environments and variable load conditions. In monitoring key indicators such as conductor temperature and carrying capacity during cable operation, existing technical means have obvious deficiencies. For example, using point temperature measuring devices (such as thermocouples) to measure the temperature of the cable can only obtain the temperature information of the local point of the cable; for example, winding the optical fiber with the buffer layer, but the temperature and other indicators monitored are only for the outer part of the cable core, which cannot directly reflect the conductor. The above-mentioned traditional monitoring methods have a large number of blind spots, especially for long-distance and large-scale distribution of urban high-voltage transmission cable lines, it is difficult to fully, timely and accurately capture the abnormal temperature changes of the entire cable line. If the local overheating of the cable cannot be detected and processed in time, with the passage of time, the insulation material in the overheated area will accelerate aging and performance degradation, and in severe cases, it may even cause insulation breakdown, leading to line short circuit, large-scale power outage in the city, which not only causes huge economic losses, but also may seriously interfere with the social production and life order.

[0004] Therefore, it is urgent to develop a cable structure that can accurately measure temperature and has high safety and reliability. SUMMARY

[0005] Based on this, the present application provides a cable structure and a manufacturing method thereof, which can accurately monitor the temperature of the cable conductor and improve the safety and reliability of the cable structure, providing support for the safe operation of the power system.

[0006] In a first aspect, the present application provides a cable structure, comprising a cable conductor, the cable conductor comprising a center line and an external conductor wrapped around the center line; the center line comprises an optical fiber, a conductor tube and a stranded wire; the optical fiber is arranged in the conductor tube, and the stranded wire is wrapped outside the conductor tube.

[0007] In one embodiment, the optical fiber positioning member is further provided, the optical fiber positioning member is provided with a cavity, and the optical fiber positioning member is arranged in the conductor tube; the optical fiber positioning member is connected to one end of the optical fiber.

[0008] In one embodiment, the optical fiber positioning member is configured as a spherical structure that fits into the gap of the conductor tube.

[0009] In one embodiment, the material of the optical fiber positioning member comprises plastic.

[0010] In one embodiment, the material of the conductor tube comprises red copper.

[0011] In one embodiment, the wall thickness of the conductor tube is between 0.8mm and 1.2mm.

[0012] In one embodiment, the stranded wire comprises copper stranded wire, aluminum stranded wire or aluminum alloy stranded wire.

[0013] In one embodiment, the outer conductor comprises a plurality of tile-shaped partition blocks that are stranded around the center line.

[0014] Alternatively, the outer conductor comprises a tightly stranded round conductor.

[0015] In one embodiment, further comprising a semi-conductive conductor shielding layer, an insulation layer, a semi-conductive insulation shielding layer, a semi-conductive buffer layer, a metal sheath layer, an anti-corrosion layer, an outer sheath layer and an outer electrode layer that are sequentially arranged outside the cable conductor and away from the cable conductor.

[0016] In a second aspect, the present application provides a manufacturing method of a cable structure, comprising:

[0017] providing a conductor tube and threading an optical fiber into the conductor tube;

[0018] stranding a plurality of stranded wires outside the conductor tube to obtain a center line;

[0019] forming an outer conductor outside the center line to obtain a cable conductor.

[0020] In one embodiment, the step of providing a conductor tube and threading an optical fiber into the conductor tube comprises:

[0021] providing a conductor tube;

[0022] connecting one end of the optical fiber to an optical fiber positioning member, the optical fiber positioning member being provided with a cavity;

[0023] placing the optical fiber positioning member into the conductor tube and driving the optical fiber positioning member to move along the conductor tube until the optical fiber is threaded into the conductor tube.

[0024] In one embodiment, after the step of forming an outer conductor outside the center line to obtain a cable conductor, the manufacturing method further comprises:

[0025] A semi-conductive conductor shielding layer, an insulation layer, a semi-conductive insulation shielding layer, a semi-conductive buffer layer, a metal sheath layer, an anti-corrosion layer, an outer sheath layer and an outer electrode layer are sequentially extruded outside the cable conductor and along a side away from the cable conductor.

[0026] The cable structure and the manufacturing method thereof can accurately detect the temperature inside the cable structure in real time through the optical fiber, and the conductor tube can protect the optical fiber from damage or even breakage during the manufacturing process of the cable structure, so that the temperature anomaly caused by overload or local overheating can be found in time through the optical fiber, and the insulation breakdown or even short circuit of the cable structure caused by the temperature anomaly can be avoided, thereby improving the safety and reliability of the cable structure and providing support for the safe operation of the power system.

[0027] In addition, by wrapping the twisted wire outside the conductor tube of the center line and wrapping the outer conductor around the center line, the structural strength of the entire cable conductor can be ensured while the current carrying capacity of the cable conductor is ensured, thereby ensuring the mechanical properties and current carrying capacity of the cable structure.

[0028] In addition, the center line includes the conductor tube and the twisted wire wrapped outside the conductor tube, which can reduce the use of conductor material, reduce the manufacturing cost of the cable conductor, and further reduce the manufacturing cost of the cable structure, and can also reduce the weight of the cable structure and facilitate the installation of the cable structure.

[0029] In summary, the present application can avoid damage or even breakage of the optical fiber during use, accurately monitor the temperature of the cable conductor through the optical fiber, improve the safety and reliability of the cable structure, ensure the mechanical properties and current carrying capacity of the cable structure, and provide support for the safe operation of the power system. In addition, the manufacturing cost of the cable structure can be reduced, the weight of the cable structure can be reduced, and the installation of the cable structure can be facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 The schematic diagram of the cable structure provided by an embodiment of the present application.

[0031] Figure 2 The structure schematic diagram of the optical fiber and the optical fiber positioning member in the cable structure provided by an embodiment of the present application.

[0032] Figure 3 The manufacturing flowchart of the cable conductor in the manufacturing method of the cable structure provided by an embodiment of the present application.

[0033] Figure 4The flow chart of the manufacturing process of the cable conductor in the manufacturing method of the cable structure provided by another embodiment of the present application.

[0034] Figure 5 The flow chart of the manufacturing method of the cable structure provided by another embodiment of the present application.

[0035] Explanation of reference numerals:

[0036] 10, cable structure; 11, cable conductor; 11a, center line; 11a1, optical fiber; 11a2, conductor tube; 11a3, stranded wire; 11b, outer conductor; 11b1, wedge-shaped separation block; 11b2, insulating paper; 12, semi-conductive conductor shielding layer; 13, insulating layer; 14, semi-conductive insulating shielding layer; 15, semi-conductive buffer layer; 16, metal sheath layer; 17, corrosion prevention layer; 18, outer sheath layer; 19, outer electrode layer; 101, optical fiber positioning member; 101a, cavity; 102, air blower. DETAILED DESCRIPTION

[0037] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways other than those described herein without departing from the spirit of the present application, and it is understood that similar modifications can be made by those skilled in the art in the light of the foregoing description, and therefore the present application is not limited to the following embodiments disclosed below.

[0038] In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0039] In addition, if there are terms such as "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0040] In the present application, unless specifically defined otherwise, if there is an appearance of the terms "installation", "connection", "connection", "fixation" and the like, these terms should be broadly interpreted. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically defined. 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.

[0041] In the present application, unless specifically defined otherwise, if there is a description of the first feature "on" or "under" the second feature and the like, it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or it can only mean that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or it can only mean that the first feature is lower than the second feature in horizontal height.

[0042] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are for illustrative purposes only and do not represent the only implementation.

[0043] Figure 1 The structural diagram of the cable structure provided by an embodiment of the present application is shown.

[0044] Referring to Figure 1 The embodiment of the present application provides a cable structure 10, which comprises a cable conductor 11, the cable conductor 11 comprising a center line 11a and an external conductor 11b wrapped around the center line 11a; the center line 11a comprises an optical fiber 11a1, a conductor tube 11a2 and a stranded wire 11a3; the optical fiber 11a1 is arranged in the conductor tube 11a2, and the stranded wire 11a3 is wrapped outside the conductor tube 11a2.

[0045] The cable structure 10 provided by the embodiment of the present application comprises a cable conductor 11, a center line 11a and an outer conductor 11b wrapped outside the center line 11a; the center line 11a comprises an optical fiber 11a1, a conductor tube 11a2 and a twisted wire 11a3; the optical fiber 11a1 is arranged in the conductor tube 11a2, and the twisted wire 11a3 is wrapped outside the conductor tube 11a2. In this way, the temperature inside the cable structure 10 can be accurately detected in real time through the optical fiber 11a1, and the conductor tube 11a2 can protect the optical fiber 11a1 from being damaged or even broken during the manufacturing process of the cable structure 10, so that the temperature anomaly caused by overload or local overheating can be found in time through the optical fiber 11a1, and the insulation breakdown or even short circuit of the cable structure 10 caused by the temperature anomaly can be avoided, thereby improving the safety and reliability of the cable structure 10 and providing support for the safe operation of the power system. In addition, by wrapping the twisted wire 11a3 outside the conductor tube 11a2 of the center line 11a and wrapping the center line 11a with the outer conductor 11b, the structural strength of the entire cable conductor 11 can be ensured while the current-carrying capacity of the cable conductor 11 is ensured, so that the mechanical properties and current-carrying capacity of the cable structure 10 can be ensured. In addition, the center line 11a comprises the conductor tube 11a2 and the twisted wire 11a3 wrapped outside the conductor tube 11a2, so that on the one hand, the use amount of the conductor material can be reduced, thereby reducing the manufacturing cost of the cable conductor 11 and further reducing the manufacturing cost of the cable structure 10; on the other hand, the weight of the cable structure 10 can be reduced, thereby facilitating the installation of the cable structure 10.

[0046] In summary, the present application can avoid the damage or even breakage of the optical fiber 11a1 during use, accurately monitor the temperature of the cable conductor 11 through the optical fiber 11a1, improve the safety and reliability of the cable structure 10, and at the same time, ensure the mechanical properties and current-carrying capacity of the cable structure 10, so that the cable structure 10 can provide support for the safe operation of the power system; in addition, the manufacturing cost of the cable structure 10 can be reduced, the weight of the cable structure 10 can be reduced, and the installation of the cable structure 10 can be facilitated.

[0047] In one embodiment, referring to Figure 2 The optical fiber positioning member 101 is arranged in the conductor tube 11a2 and connected to one end of the optical fiber 11a1.

[0048] Thus, when installing the optical fiber 11a1, the optical fiber 11a1 can be guided to move along the conductor tube 11a2 by driving the optical fiber positioning member 101 to move along the conductor tube 11a2, so that the optical fiber 11a1 can be conveniently arranged in the conductor tube 11a2. When the optical fiber 11a1 is installed in place, the optical fiber positioning member 101 can fix the optical fiber 11a1 in the conductor tube 11a2, that is, the installation and fixation of the optical fiber 11a1 can be facilitated by the optical fiber positioning member 101, and the manufacturing efficiency of the cable structure 10 is improved.

[0049] In one embodiment, referring to Figure 2 , the optical fiber positioning member 101 is configured as a spherical structure which is in a gap fit with the conductor tube 11a2. That is, the diameter of the spherical structure is slightly smaller than the diameter of the conductor tube 11a2.

[0050] Thus, when installing the optical fiber 11a1, the optical fiber 11a1 can be guided to move along the conductor tube 11a2 by driving the optical fiber positioning member 101 to move along the conductor tube 11a2, so that the optical fiber 11a1 can be conveniently arranged in the conductor tube 11a2. When the optical fiber 11a1 is installed in place, the optical fiber positioning member 101 can fix the optical fiber 11a1 in the conductor tube 11a2, that is, the installation and fixation of the optical fiber 11a1 can be facilitated by the optical fiber positioning member 101, and the manufacturing efficiency of the cable structure 10 is improved.

[0051] In one embodiment, the material of the optical fiber positioning member 101 includes plastic.

[0052] Thus, the weight of the optical fiber positioning member 101 can be small, referring to Figure 2 , when installing the optical fiber 11a1, the optical fiber positioning member 101 can be driven to move along the conductor tube 11a2 by the air blower 102, so that the optical fiber 11a1 can be conveniently arranged in the conductor tube 11a2, and the operation is convenient and fast, so that the manufacturing efficiency of the cable structure 10 is improved, and the equipment investment cost during the manufacturing of the cable structure 10 is reduced.

[0053] In one embodiment, the material of the conductor tube 11a2 includes red copper.

[0054] Thus, the electrical conductivity of the conductor tube 11a2 is improved, the influence of the conductor tube 11a2 on the current carrying capacity of the cable conductor 11 is reduced, and the current transmission efficiency of the cable conductor 11 is ensured, so that the mechanical properties and current transmission efficiency of the cable structure 10 can be ensured.

[0055] In one embodiment, the wall thickness of the conductor tube 11a2 is between 0.8mm and 1.2mm.

[0056] In this way, the conductor tube 11a2 has a certain structural strength, so as to ensure the structural strength of the entire cable conductor 11, and improve the safety and reliability of the cable structure 10.

[0057] In one of the embodiments, the stranded wire 11a3 includes copper stranded wire, aluminum stranded wire or aluminum alloy stranded wire.

[0058] In this way, the structural strength of the center line 11a can be improved, and the current carrying capacity of the center line 11a can be improved, so as to improve the structural strength and current carrying capacity of the cable conductor 11, and further improve the mechanical properties and current transmission efficiency of the cable structure 10.

[0059] In one of the embodiments, the optical fiber 11a1 includes one of single mode optical fiber and multi-mode optical fiber.

[0060] In this way, the purity and efficiency of the optical signal transmission path can be ensured.

[0061] It should be noted that the optical fiber 11a1 has good flexibility, so that the optical fiber 11a1 can adapt to the bending, stretching and other mechanical stresses in the manufacturing, laying and operation process of the cable structure, and ensure that the internal optical path is not broken and the performance is not degraded. The temperature resistance of the optical fiber 11a1 is above 90℃, so that the optical fiber 11a1 can still stably transmit signals in the high temperature working environment of the cable conductor 11 due to load current.

[0062] In one of the embodiments, referring to Figure 1 , the outer conductor 11b includes a plurality of tile-shaped separated strand blocks 11b1, and the plurality of tile-shaped separated strand blocks 11b1 are twistedly arranged around the center line 11a. Specifically, the outer conductor 11b includes four or more tile-shaped separated strand blocks 11b1, for example, the outer conductor 11b includes five or seven tile-shaped separated strand blocks 11b1.

[0063] In this way, by including a plurality of tile-shaped separated strand blocks 11b1, and the plurality of tile-shaped separated strand blocks 11b1 are twistedly arranged around the center line 11a, the current can be more uniformly distributed in the cable conductor 11, and the current transmission capacity of the cable can be effectively improved.

[0064] Further, each tile-shaped separated strand block 11b1 has the same size and the same hinged direction.

[0065] Further, the outer conductor 11b further includes an insulating paper 11b2, and the insulating paper 11b2 is arranged between each two adjacent tile-shaped separated strand blocks 11b1. Specifically, the insulating paper 11b2 can be graphene insulating paper 11b2.

[0066] In another embodiment, the outer conductor 11b includes a tightly twisted round conductor.

[0067] Thus, by adopting the tightly-pressed stranded round conductor for the outer conductor 11b, the gap between the outer conductor 11b can be extremely small, which not only greatly improves the mechanical strength, bending performance and creep resistance of the outer conductor 11b, but also optimizes the roundness thereof for facilitating the subsequent extrusion of the insulation and sheath. In addition, the structure of the outer conductor 11b can be made more compact, which can effectively increase the effective cross-sectional area of the outer conductor 11b, reduce the alternating current resistance, thereby reducing the line loss and improving the heat dissipation, and further improving the transmission efficiency and carrying capacity of the cable structure 10, and enhancing the overall stability and life of the cable structure 10.

[0068] In one embodiment, referring to Figure 1 , the cable structure 10 further comprises a semi-conductive conductor shielding layer 12, an insulation layer 13, a semi-conductive insulation shielding layer 14, a semi-conductive buffer layer 15, a metal sheath layer 16, an anti-corrosion layer 17, an outer sheath layer 18 and an outer electrode layer 19 which are sequentially arranged outside the cable conductor 11 and away from the cable conductor 11.

[0069] The semi-conductive conductor shielding layer 12 can smooth the electric field distortion and slight concave-convex on the surface of the cable conductor 11, and eliminate the hidden danger of partial discharge; the insulation layer 13 can insulate the working voltage; the semi-conductive insulation shielding layer 14 can further uniformly bind the electric field within the insulation layer 13. The three layers are closely matched and collectively “wrap” the powerful electric field stress, greatly suppressing the partial discharge and electric treeing that may cause breakdown, thereby significantly improving the insulation strength, long-term reliability and service life of the cable structure 10, and ensuring the safety and stability of power transmission. The semi-conductive conductor shielding layer 12, the insulation layer 13 and the semi-conductive insulation shielding layer 14 can be made by a three-layer co-extrusion process, the semi-conductive conductor shielding layer 12 is formed by extruding semi-conductive shielding material on the outer surface of the cable conductor 11, the insulation layer 13 is formed by extruding insulation material on the outer surface of the semi-conductive conductor shielding layer 12, and the semi-conductive insulation shielding layer 14 is formed by extruding semi-conductive shielding material on the outer surface of the insulation layer 13. The semi-conductive buffer layer 15 can effectively absorb the deformation caused by mechanical stress and thermal expansion and contraction, and protect the insulation core inside the cable structure 10. The metal sheath layer 16 constitutes an absolute radial waterproof barrier and bears the fault short-circuit current, which is a double guarantee for waterproofing and electrical safety. The anti-corrosion layer 17 and the outer sheath layer 18 can jointly resist the erosion of complex external environments such as chemical corrosion, mechanical wear and tear, and marine organisms. The outer electrode layer 19 is designed for DC submarine cables and can effectively suppress charge accumulation and electric field distortion. That is, by sequentially arranging the semi-conductive conductor shielding layer 12, the insulation layer 13, the semi-conductive insulation shielding layer 14, the semi-conductive buffer layer 15, the metal sheath layer 16, the anti-corrosion layer 17, the outer sheath layer 18 and the outer electrode layer 19 outside the cable conductor 11 and away from the cable conductor 11, the cable structure 10 can have extremely high electrical strength, mechanical toughness, environmental resistance and ultra-long service life.

[0070] In one embodiment, the metal sheath layer 16 is an aluminum sheath layer, and / or the thickness of the aluminum sheath layer is between 1.5mm and 2.3mm.

[0071] In this way, the compression resistance, impact resistance and creep resistance of the cable structure 10 can be improved, so that the cable structure 10 can effectively resist the impact of sharp objects during installation, external mechanical forces during operation and soil pressure, and the safety of the internal cable conductor 11 can be ensured. The aluminum sheath layer can provide a continuous, complete and seamless rigid sealing barrier, effectively preventing the radial penetration of moisture and humidity, thereby improving the safety and reliability of the cable structure 10.

[0072] In one example, the aluminum sheath layer is a smooth aluminum sheath, and the thickness of the smooth aluminum sheath is between 1.5mm and 1.8mm.

[0073] In this way, the compression resistance, impact resistance and creep resistance of the cable structure 10 can be improved, so that the cable structure 10 can effectively resist the impact of sharp objects during installation, external mechanical forces during operation and soil pressure, and the safety of the internal cable conductor 11 can be ensured. The smooth aluminum sheath structure can provide a continuous, complete and seamless rigid sealing barrier, effectively preventing the radial penetration of moisture and humidity, thereby improving the safety and reliability of the cable structure 10.

[0074] In another example, the aluminum sheath layer is a corrugated aluminum sheath, and the thickness of the corrugated aluminum sheath is between 2.0mm and 2.3mm.

[0075] In this way, by using a corrugated aluminum sheath structure for the aluminum sheath layer, the radial stiffness and axial flexibility of the aluminum sheath layer can be increased, so that the aluminum sheath layer can effectively resist external large pressure, mechanical impact and adapt to changes in terrain, effectively absorb and compensate internal stress of the cable structure 10 due to thermal expansion and contraction, and prevent mechanical damage. In addition, the radial waterproof and moisture-proof performance of the aluminum sheath layer can be improved. Furthermore, the aluminum sheath layer forms a low-resistance, continuous and reliable metal shielding layer, which can effectively guide short-circuit current and fault charge, and suppress external electromagnetic interference, thereby improving the safety and reliability of the cable structure 10.

[0076] In one embodiment, the anticorrosive layer 17 is made of hot melt adhesive.

[0077] In one embodiment, the outer sheath layer 18 is made of one of a polyethylene-based material, a polypropylene-based material and a polyvinyl chloride material.

[0078] In one embodiment, the thickness of the outer sheath layer 18 is between 4mm and 5mm.

[0079] In a second aspect, referring to Figure 1 and Figure 3The application provides a manufacturing method of a cable structure 10, comprising the following steps:

[0080] S10, providing a conductor tube 11a2 and arranging an optical fiber 11a1 in the conductor tube 11a2;

[0081] S20, twisting a plurality of twisted wires 11a3 outside the conductor tube 11a2 to obtain a center line 11a;

[0082] S30, forming an outer conductor 11b outside the center line 11a to obtain a cable conductor 11.

[0083] The manufacturing method of the cable structure 10 provided by the application has the advantages that the optical fiber 11a1 is arranged in the conductor tube 11a2, the plurality of twisted wires 11a3 are twisted outside the conductor tube 11a2 to obtain the center line 11a, and the outer conductor 11b is formed outside the center line 11a to obtain the cable conductor 11. In this way, the conductor tube 11a2 can protect the optical fiber 11a1, so that the optical fiber 11a1 is not damaged or even broken during the manufacturing process of the cable structure 10, the temperature in the cable structure 10 can be monitored in real time and accurately through the optical fiber 11a1, temperature abnormalities caused by overload or local overheating can be found in time, insulation breakdown or even short circuit of the cable structure 10 caused by temperature abnormalities can be avoided, and the safety and reliability of the cable structure 10 are improved, thereby providing support for safe operation of a power system. In addition, the twisted wires 11a3 are wrapped outside the conductor tube 11a2 of the center line 11a, and the outer conductor 11b wraps the center line 11a, so that the structural strength of the cable conductor 11 obtained by manufacturing can be ensured, and the current-carrying capacity of the cable conductor 11 obtained by manufacturing can be ensured, thereby ensuring the mechanical properties and current-carrying capacity of the cable structure 10 obtained by manufacturing. In addition, the center line 11a comprises the conductor tube 11a2 and the twisted wires 11a3 wrapped outside the conductor tube 11a2, so that on the one hand, the use amount of conductor material can be reduced, thereby reducing the manufacturing cost of the cable conductor 11 and the manufacturing cost of the cable structure 10; on the other hand, the weight of the cable structure 10 can be reduced, thereby facilitating installation of the cable structure 10.

[0084] In one of the embodiments, referring to Figure 2 and Figure 4 S10, providing a conductor tube 11a2 and arranging an optical fiber 11a1 in the conductor tube 11a2, specifically comprising the following steps:

[0085] S110, providing a conductor tube 11a2;

[0086] S120, connecting one end of the optical fiber 11a1 with a fiber positioning member 101, and the fiber positioning member 101 is provided with a cavity 101a;

[0087] S130, the optical fiber positioning member 101 is placed in the conductor tube 11a2, and the optical fiber positioning member 101 is driven to move along the conductor tube 11a2 until the optical fiber 11a1 is arranged in the conductor tube 11a2.

[0088] Specifically, the optical fiber positioning member 101 can be a plastic ball, and a stable air flow can be blown into the conductor tube 11a2 by the air blower 102 to drive the optical fiber positioning member 101 to move along the conductor tube 11a2, thereby guiding the optical fiber 11a1 to move along the conductor tube 11a2, and thereby arranging the optical fiber 11a1 in the conductor tube 11a2.

[0089] In the above process, by connecting one end of the optical fiber 11a1 with the optical fiber positioning member 101, the optical fiber positioning member 101 is provided with a cavity 101a, the optical fiber positioning member 101 is placed in the conductor tube 11a2, and the optical fiber positioning member 101 is driven to move along the conductor tube 11a2, thereby guiding the optical fiber 11a1 to move along the conductor tube 11a2, thereby facilitating the arrangement of the optical fiber 11a1 in the conductor tube 11a2. When the optical fiber 11a1 is installed in place, the optical fiber positioning member 101 can fix the optical fiber 11a1 in the conductor tube 11a2, so that the optical fiber 11a1 is arranged centrally in the conductor tube 11a2, thereby improving the accuracy of the temperature monitoring of the optical fiber 11a1 in the cable structure 10, and thereby improving the safety and reliability of the cable structure 10.

[0090] In one embodiment, referring to Figure 1 and Figure 5 After the outer conductor 11b is formed outside the center line 11a to obtain the cable conductor 11, the manufacturing method further comprises:

[0091] S40, the semiconductive conductor shielding layer 12, the insulating layer 13, the semiconductive insulating shielding layer 14, the semiconductive buffer layer 15, the metal sheath layer 16, the corrosion-resistant layer 17, the outer sheath layer 18, and the outer electrode layer 19 are successively extruded on the outside of the cable conductor 11 and on the side away from the cable conductor 11.

[0092] Specifically, the metal sheath layer 16 is an aluminum sheath layer, which can be made by extrusion or welding.

[0093] When the aluminum sheath layer is a smooth aluminum sheath, the specific manufacturing steps include: forming an aluminum sheath on the outside of the semiconductive buffer layer 15 by extrusion or welding, and forming a smooth aluminum sheath after reducing the diameter.

[0094] When the aluminum sheath layer is a corrugated aluminum sheath, the specific manufacturing steps include: forming an aluminum sheath on the outside of the semiconductive buffer layer 15 by extrusion or welding, and forming a corrugated aluminum sheath after corrugation.

[0095] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, it is to be understood that the application embraces all such possible combinations.

[0096] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A cable structure, characterized in that, The cable conductor includes a centerline and an outer conductor wrapped around the centerline; the centerline includes an optical fiber, a conductor tube, and stranded wires; the optical fiber passes through the conductor tube, and the stranded wires are wrapped around the outside of the conductor tube.

2. The cable structure according to claim 1, characterized in that, It also includes an optical fiber positioning component, which has a cavity inside and is located inside the conductor tube; the optical fiber positioning component is connected to one end of the optical fiber.

3. The cable structure according to claim 2, characterized in that, The fiber optic positioning element is constructed as a spherical structure, which is gap-fitted with the conductor tube.

4. The cable structure according to claim 2, characterized in that, The fiber optic positioning component is made of plastic.

5. The cable structure according to claim 1, characterized in that, The conductor tube is made of copper.

6. The cable structure according to claim 5, characterized in that, The wall thickness of the conductor tube is between 0.8 mm and 1.2 mm.

7. The cable structure according to claim 1, characterized in that, The stranded wire includes copper stranded wire, aluminum stranded wire, or aluminum alloy stranded wire.

8. The cable structure according to claim 1, characterized in that, The outer conductor includes a plurality of corrugated separator strands, which are twisted together around the center line. Alternatively, the outer conductor may comprise a tightly twisted circular conductor.

9. The cable structure according to any one of claims 1 to 8, characterized in that, It also includes a semiconducting conductor shielding layer, an insulating layer, a semiconducting insulating shielding layer, a semiconducting buffer layer, a metal sheath layer, an anti-corrosion layer, an outer sheath layer, and an outer electrode layer, which are disposed outside the cable conductor and arranged sequentially in a direction away from the cable conductor.

10. A method for manufacturing a cable structure, characterized in that, include: Provide a conductor tube and pass the optical fiber through the conductor tube; Multiple stranded wires are twisted together on the outside of the conductor tube to obtain a center line; An outer conductor is formed outside the centerline to obtain the cable conductor.

11. The method for manufacturing the cable structure according to claim 10, characterized in that, The step of providing a conductor tube and threading the optical fiber through the conductor tube includes: Provide conductor tubes; One end of the optical fiber is connected to an optical fiber positioning component, which has a cavity inside. The fiber positioning element is placed inside the conductor tube, and the fiber positioning element is driven to move along the conductor tube until the fiber is inserted into the conductor tube.

12. The method for manufacturing the cable structure according to claim 10, characterized in that, After forming an outer conductor outside the centerline to obtain the cable conductor, the manufacturing method further includes: A semiconductive conductor shielding layer, an insulating layer, a semiconductive insulating shielding layer, a semiconductive buffer layer, a metal sheath layer, an anti-corrosion layer, an outer sheath layer, and an outer electrode layer are sequentially extruded on the outside of the cable conductor and along the side away from the cable conductor.

Images