Self-damping wire

Abstract

The utility model relates to the technical field of power transmission lines, in particular to a self-damping wire. The self-damping wire comprises a force bearing layer and a conductive layer, the conductive layer is arranged on the outer layer of the force bearing layer in a surrounding mode, and a first gap is formed between the force bearing layer and the conductive layer; the conductive layers comprise at least two first conductive layers and at least one second conductive layer, the first conductive layers and the second conductive layers are alternately arranged at intervals, and a second gap is formed between the adjacent first conductive layer and second conductive layer; the first gap and the second gap are filled with lubricating media. According to the self-damping wire, the first conductive layers and the second conductive layers are alternately arranged at intervals, strand recovery during wire construction is facilitated, strand recovery is faster, and construction time is shorter.

Description

Technical Field

[0001] This application relates to the field of power transmission line technology, and in particular to a self-damping conductor. Background Technology

[0002] Overhead transmission lines are the main method of transmitting long-distance, high-capacity electrical energy in power systems. With industrial development and urbanization, the cross-section of overhead conductors is constantly increasing to meet the ever-growing demand for electricity.

[0003] In related technologies, overhead conductors consist of a load-bearing core wire and multiple conductive layers. There are gaps between the load-bearing core wire and the conductive layers, which are filled with grease to prevent friction between the wire layers. The multiple conductive layers are made of twisted shaped wires, which can seal the grease.

[0004] However, multi-layer irregular-shaped wire structures are prone to breakage during construction, and once the breakage occurs, the wires are difficult to recover. Utility Model Content

[0005] This application provides a self-damping conductor to solve the technical problem that current multi-layer irregular wire structures are prone to strand breakage during construction, and the strands are difficult to recover after breakage.

[0006] This application provides a self-damping conductor, including a load-bearing layer and a conductive layer, wherein the conductive layer surrounds the load-bearing layer and a first gap exists between the load-bearing layer and the conductive layer.

[0007] The conductive layer includes at least two first conductive layers and at least one second conductive layer, with the first and second conductive layers alternately spaced apart, and a second gap between adjacent first and second conductive layers; the first and second gaps are filled with a lubricating medium.

[0008] The self-damping conductor provided in this application has at least three conductive layers and a large cross-section. By filling the gap between the first gap and the second gap with a lubricating medium, the self-damping conductor has good self-damping characteristics. The first conductive layer and the second conductive layer are alternately arranged, which is more conducive to the recovery of the strands during the construction of the conductor. The strands recover faster and the construction time is shorter.

[0009] In one possible implementation, the first conductive layer is formed by twisting together multiple irregularly shaped structural wires, and the second conductive layer is formed by twisting together multiple circular structural wires.

[0010] This configuration allows for alternating layers of irregular and circular wire structures, which facilitates strand restoration during conductor installation.

[0011] In one possible implementation, the outermost layer of the conductive layer is a first conductive layer, which is used to prevent leakage of the lubricating medium.

[0012] This design allows for the formation of a seal through irregularly shaped linear layers, preventing leakage of the lubricating medium.

[0013] As one possible implementation, the surface of the first conductive layer has grooves for forming gaps to fill the lubricating medium, or the grooves are used to disturb the airflow on the surface of the self-damping conductor to reduce wind load.

[0014] This design increases the gap between conductive layers through the grooves, thereby increasing the volume of lubricating medium. At the same time, the grooves reduce the wind load on the surface of the conductor, preventing the conductor from vibrating.

[0015] As one possible implementation, each irregularly shaped structural line of the first conductive layer is provided with at least one groove.

[0016] This design further increases the gap between conductive layers through multiple grooves, while also ensuring that the surface of the conductor has grooves in all directions, resulting in better vibration damping performance.

[0017] As one possible implementation, the height of the first gap is greater than or equal to the height of the second gap.

[0018] This design allows more lubricating medium to be filled in the first gap, reducing the coefficient of friction at the contact surface between the load-bearing layer and the conductive layer, and delaying wear.

[0019] As one possible implementation, the depth of the groove is 1%-100% of the thickness of the first conductive layer.

[0020] This design allows for adjustments to the groove depth to change the wind resistance coefficient of the conductor or the filling volume of the lubricating medium, thus adapting to environments with varying wind speeds.

[0021] As one possible implementation, the depth of the groove is 3%-10% of the thickness of the first conductive layer.

[0022] This configuration allows for changes in the wind resistance coefficient of the conductor or the filling volume of the lubricating medium without affecting the conductivity of the first conductive layer, thus adapting to environments with different wind speeds.

[0023] As one possible implementation, the first conductive layer and the second conductive layer are twisted in opposite directions.

[0024] This configuration balances the torque inside the conductor and improves its structural stability.

[0025] As one possible implementation, the load-bearing layer is made of multiple load-bearing core wires twisted together.

[0026] This design increases the load-bearing capacity of the load-bearing layer while maintaining overall load-bearing strength even if a single core wire breaks.

[0027] This application provides a self-damping conductor, comprising a load-bearing layer and a conductive layer. The conductive layer surrounds the load-bearing layer, and a first gap exists between the load-bearing layer and the conductive layer. The conductive layer includes at least two first conductive layers and at least one second conductive layer, which are alternately arranged. A second gap exists between adjacent first and second conductive layers. The first and second gaps are filled with a lubricating medium. The alternating arrangement of the first and second conductive layers in the self-damping conductor provided by this application facilitates strand recovery during conductor construction, resulting in faster strand recovery and shorter construction time.

[0028] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the self-damping conductors provided by this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the self-damping conductor provided in Embodiment 1 of this application;

[0031] Figure 2 This is a schematic diagram of the structure of the self-damping conductor provided in Embodiment 2 of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 10-Self-damping conductor;

[0034] 100 - Load-bearing layer; 110 - First gap;

[0035] 200 - Conductive layer; 210 - Second gap; 220 - First conductive layer; 221 - Groove; 230 - Second conductive layer. Detailed Implementation

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0038] The terms "first," "second," and "third" (if any) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.

[0039] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such as a process, method, system, product, or maintenance tool that includes a series of steps or units, not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or maintenance tool.

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] Overhead transmission lines are the main method of long-distance, high-capacity power transmission in power systems. With industrial development and urbanization, the cross-section of overhead conductors is constantly increasing to meet the growing demand for electricity.

[0042] In related technologies, overhead conductors consist of a load-bearing core wire and multiple conductive layers. There are gaps between the load-bearing core wire and the conductive layers, which are filled with grease to prevent friction between the wire layers. The multiple conductive layers are made of twisted irregular wires, thereby sealing the grease.

[0043] However, irregularly shaped wires are prone to misalignment when bent or under stress. If the process control is not strict during stranding, local loosening may occur, leading to strand breakage during construction and making construction more difficult. This is especially true when multiple layers of irregularly shaped wires are set up adjacently, which makes strand breakage more likely and difficult to restore.

[0044] To address the aforementioned technical problems, this application provides a self-damping conductor. The conductor has a first gap between its load-bearing layer and conductive layer, and a second gap between its first and second conductive layers. The first and second gaps are filled with a lubricating medium to reduce friction between the layers, thereby giving the conductor excellent self-damping characteristics. The alternating arrangement of the first and second conductive layers reduces construction difficulty and facilitates strand recovery during conductor construction, resulting in faster strand recovery and shorter construction time.

[0045] Figure 1 This is a schematic diagram of the structure of the self-damping conductor provided in Embodiment 1 of this application; Figure 2 This is a schematic diagram of the structure of the self-damping conductor provided in Embodiment 2 of this application.

[0046] Reference Figure 1 and Figure 2 This application provides a self-damping conductor 10, including a load-bearing layer 100 and a conductive layer 200. The conductive layer 200 surrounds the outer layer of the load-bearing layer 100, and a first gap 110 is formed between the load-bearing layer 100 and the conductive layer 200.

[0047] The conductive layer 200 includes at least two first conductive layers 220 and at least one second conductive layer 230, the first conductive layers 220 and the second conductive layers 230 are alternately spaced, and there is a second gap 210 between adjacent first conductive layers 220 and second conductive layers 230; the first gap 210 and the second gap 210 are filled with a lubricating medium.

[0048] The load-bearing layer 100 is used to bear mechanical loads and resist external forces such as the self-damping conductor 10's own weight, wind pressure, and icing, so as to maintain the overall shape and sag of the self-damping conductor 10. The load-bearing core wire of the load-bearing layer 100 can be a high-strength galvanized steel wire, a high-strength galvanized aluminum alloy steel wire, a high-strength aluminum-clad steel wire, or a high-strength aluminum-clad Invar steel wire, etc. The embodiments of this application do not make specific limitations. The conductive layer 200 is used to transmit power and can share part of the load of the self-damping conductor 10. The conductive layer 200 can be a high-strength aluminum-magnesium-silicon alloy wire, aluminum wire, aluminum-zirconium alloy wire, etc. The embodiments of this application do not make specific limitations. The conductive material needs to have good conductivity and be able to bear part of the load.

[0049] It is understood that the conductive layer 200 includes at least two first conductive layers 220 and at least one second conductive layer 230, meaning the conductive layer 200 has at least a three-layer conductive structure. This allows the cross-section of the self-damping conductor 10 to be larger than that of a conventional self-damping conductor, resulting in a larger wind-receiving area, greater wind load, and more intense vibration. By filling both the first gap 110 and the second gap 210 with a lubricating medium, such as grease, paste, or high-viscosity silicone grease, the mechanical energy of the vibration can be converted into heat energy, reducing vibration. Simultaneously, the lubricating medium can reduce friction between adjacent layers, preventing damage from frictional contact. Furthermore, some lubricating media can also serve as insulation.

[0050] For example, the conductive layer 200 can have three, four, or five layers, etc., and this application does not make specific limitations.

[0051] It should be noted that the first conductive layer 220 is made of multiple irregularly shaped structural wires twisted together. The cross-section of the irregularly shaped structural wires can be C-shaped, Z-shaped, etc. The second conductive layer 230 is made of multiple circular structural wires twisted together. Circular structural wires are easier to restore when twisting during construction. By setting the first conductive layer 220 and the second conductive layer 230 alternately, it is easier to restore the wire strands during construction, resulting in faster wire strand restoration and shorter construction time.

[0052] It should be noted that the first conductive layer 220 and the second conductive layer 230 can be stranded using a frame-type stranding machine. Before stranding, the wire separating plate, wire positioning tube, guide wheel nozzle, and inner groove of the wire separating disc positioning guide wheel need to be modified to avoid problems such as scraping, bending, and twisting of irregularly shaped wires. During wire pulling, equipment modification and special operations are required, including fixing the wire pulling mold, adjusting the wire take-up and laying speed, and making positioning wheels for irregularly shaped wires to prevent problems such as wire flipping, collapse, or compression.

[0053] As one possible implementation, the outermost layer of the conductive layer 200 is a first conductive layer 220, which is used to prevent leakage of lubricating medium.

[0054] It is understood that the outermost layer of the conductive layer 200 is the first conductive layer 220, and the innermost layer of the conductive layer 200 can be either the first conductive layer 220 or the second conductive layer 230. There are at least two first conductive layers 220 to ensure the sealing performance of the conductive layer 200 and prevent leakage of the lubricating medium.

[0055] As one possible implementation, the surface of the first conductive layer 220 has a groove 221, which is used to form a gap to fill the lubricating medium, or the groove 221 is used to disturb the airflow on the surface of the self-damping wire 10 to reduce the wind load.

[0056] It should be noted that the groove 221 can be provided only on the outer surface of the first conductive layer 220, or the groove 221 can be provided on both the outer and inner surfaces of the first conductive layer 220. The groove 221 can be V-shaped, U-shaped, etc., and this application embodiment does not make specific limitations.

[0057] Understandably, the grooves 221 on the outer surface of the outermost first conductive layer 220 are in contact with the external environment. When exposed to wind, the grooves 221 disrupt the uniform airflow, causing turbulence within the grooves 221, thus reducing the wind resistance coefficient and lowering the wind load by more than 30%. This reduces the vibration frequency and prevents the self-damping conductor 10 from wearing down or even breaking due to long-term wind fatigue vibration. In addition, the grooves 221 can also reduce noise.

[0058] In some embodiments, in addition to the outermost first conductive layer 220, the surface of the remaining first conductive layers 220 may also be provided with grooves 221. The grooves 221 increase the gap volume between the first conductive layer 220 and the second conductive layer 230, allowing more lubricating grease to be filled, thereby further improving the self-damping characteristics of the wire.

[0059] As one possible implementation, each irregularly shaped structural line of the first conductive layer 220 is provided with at least one groove 221.

[0060] In this embodiment, the first conductive layer 220 and the second conductive layer 230 use aluminum as the conductive material. The first conductive layer 220 is formed by twisting together multiple irregular aluminum wires, and each irregular aluminum wire can be provided with at least one groove 221.

[0061] In some embodiments, at least one groove 221 is provided on the outer surface of the shaped aluminum wire of the outermost first conductive layer 220 to reduce wind load. The first conductive layer 220 and the second conductive layer 230 are adjacent but not in contact, and the second gap 210 between the first conductive layer 220 and the second conductive layer 230 is filled with a lubricating medium to improve self-damping characteristics.

[0062] In other embodiments, at least one groove 221 is provided on both the outer and inner surfaces of the shaped aluminum wires of the first conductive layer 220. The first conductive layer 220 and the second conductive layer 230 are in partial contact. The gaps between the circular wires of the second conductive layer 230 and the grooves 221 of the first conductive layer 220 can form a second gap 210 to fill the lubricating medium. Each circular wire of the second conductive layer 230 needs to avoid falling into the groove 221, and the circular wire can contact the two ends of the groove 221.

[0063] As one possible implementation, the height of the first gap 110 is greater than or equal to the height of the second gap 210.

[0064] It should be noted that the conductive layer 200 does not contact the load-bearing layer 100. During construction, the innermost layer of the conductive layer 200 and the outer surface of the load-bearing layer 100 have a certain distance, which is equal to the height of the first gap 110. The load-bearing layer 100 and the conductive layer 200 are prone to friction, which can lead to strand breakage. Therefore, more lubricating medium needs to be filled. The height of the second gap 210 is less than or equal to the height of the first gap 110. In some scenarios, the height of the second gap 210 can be reduced to reduce the cross-sectional area of ​​the self-damping conductor 10.

[0065] In some embodiments, the depth of the groove 221 is 1%-100% of the thickness of the first conductive layer 220.

[0066] In some embodiments, the depth of the groove 221 is 3%-10% of the thickness of the first conductive layer 220. Within this range, the groove 221 can effectively disrupt the laminar boundary layer, induce micro-turbulence in the airflow within the groove 221, reduce the Karman vortex street, and thus reduce wind pressure drag. If the groove 221 is too shallow, it cannot sufficiently disturb the airflow, and the drag reduction effect is not significant; if the groove 221 is too deep, it will affect the conductivity.

[0067] As one possible implementation, the first conductive layer 220 and the second conductive layer 230 are twisted in opposite directions.

[0068] Understandably, the torsional moments generated by the reverse twisting of adjacent layers cancel each other out, preventing the conductor from rotating as a whole when under tension. Furthermore, under alternating stress, the reverse twisting results in a more uniform load distribution, preventing stress concentration in a single layer.

[0069] As one possible implementation, the load-bearing layer 100 is composed of multiple load-bearing core wires twisted together. For example, the load-bearing layer 100 can be composed of multiple high-strength galvanized steel wires twisted together, with the twisting direction of the multiple galvanized steel wires opposite to the twisting direction of the innermost conductive wire of the conductive layer 200. The multiple core wires twisted together form a parallel load-bearing layer, and when a single core wire breaks, the remaining core wires can instantly share the load, avoiding sudden breakage.

[0070] It should be noted that the load-bearing core wire can be made of high-strength tensile materials such as galvanized steel core, galvanized aluminum alloy steel core, aluminum-clad steel core, and aluminum-clad Invar steel core.

[0071] It should be noted that, in some embodiments, two adjacent line layers in the conductive layer 200 may both be either the first conductive layer 220 or the second conductive layer 230.

[0072] For example, the conductive layer 200 includes three first conductive layers 220. All three first conductive layers 220 use aluminum wires with a profiled structure and form a cylindrical support surface. The load-bearing core wire uses high-strength galvanized steel wire. The inner and middle aluminum conductors use high-strength aluminum-magnesium-silicon alloy wire. The inner and middle layers are second conductive layers 230, and the outermost layer is the first conductive layer 220, which uses a profiled wire structure with V-shaped grooves 221. The profiled aluminum wire has a C-shaped cross-section. The outermost profiled wire structure with V-shaped grooves 221 can reduce wind load by more than 35%, significantly reduce wind resistance coefficient, and significantly reduce noise and fatigue vibration. The three-layer gap structure gives the conductor excellent self-damping performance, suppressing micro-wind vibration and avoiding the risk of fatigue strand breakage. At high temperatures, only the reinforcing core bears the force, giving the conductor excellent sag characteristics and improving mechanical strength and stability.

[0073] For example, the conductive layer 200 includes four conductive wire layers, which form a cylindrical support surface. The load-bearing core wire is made of high-strength aluminum-clad steel wire, the inner and second inner aluminum conductors are made of high-strength aluminum-magnesium-silicon alloy wire, the inner and second inner layers are the second conductive layer 230, the second outer aluminum conductor adopts a special-shaped wire structure design, and the outermost conductive layer 200 adopts a special-shaped wire structure with V-shaped grooves 221. The second outermost and outermost layers are the first conductive layer 220. The aluminum wire with the special-shaped wire structure has a C-shaped cross-section. The special-shaped wire structure with V-shaped grooves 221 on the outermost layer can reduce wind load by more than 40%, greatly reduce the wind resistance coefficient, and minimize noise and fatigue vibration. With a four-layer gap structure, the conductor has excellent self-damping performance, which can suppress various wind vibrations and avoid the risk of fatigue strand breakage. At high temperatures, only the reinforcing core is stressed, and the conductor has excellent sag characteristics, which greatly improves mechanical strength and stability.

[0074] This application provides a self-damping conductor 10, including a load-bearing layer 100 and a conductive layer 200. The conductive layer 200 surrounds the load-bearing layer 100, and a first gap 110 exists between the load-bearing layer 100 and the conductive layer 200. The conductive layer 200 includes at least two first conductive layers 220 and at least one second conductive layer 230, which are alternately arranged. A second gap 210 exists between adjacent first conductive layers 220 and second conductive layers 230. The first gap 110 and the second gap 210 are filled with a lubricating medium. The alternating arrangement of the first conductive layers 220 and the second conductive layers 230 in the self-damping conductor 10 provided by this application facilitates strand recovery during conductor construction, resulting in faster strand recovery and shorter construction time.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A self-damping conductor, characterized in that, The self-damping conductor (10) includes a load-bearing layer (100) and a conductive layer (200). The conductive layer (200) surrounds the load-bearing layer (100) and there is a first gap (110) between the load-bearing layer (100) and the conductive layer (200). The conductive layer (200) includes at least two first conductive layers (220) and at least one second conductive layer (230), the first conductive layers (220) and the second conductive layers (230) are alternately spaced, and there is a second gap (210) between adjacent first conductive layers (220) and second conductive layers (230); the first gap (110) and the second gap (210) are filled with a lubricating medium.

2. The self-damping conductor according to claim 1, characterized in that, The first conductive layer (220) is formed by twisting together multiple irregularly shaped structural wires, and the second conductive layer (230) is formed by twisting together multiple circular structural wires.

3. The self-damping conductor according to claim 2, characterized in that, The outermost layer of the conductive layer (200) is the first conductive layer (220), which is used to prevent the lubricating medium from leaking.

4. The self-damping conductor according to claim 3, characterized in that, The surface of the first conductive layer (220) has a groove (221) for forming a gap to fill a lubricating medium, or the groove (221) for disturbing the airflow on the surface of the self-damping conductor (10) to reduce wind load.

5. The self-damping conductor according to claim 4, characterized in that, Each irregular structure line of the first conductive layer (220) is provided with at least one groove (221).

6. The self-damping conductor according to claim 1, characterized in that, The height of the first gap (110) is greater than or equal to the height of the second gap (210).

7. The self-damping conductor according to claim 4, characterized in that, The depth of the groove (221) is 1%-100% of the thickness of the first conductive layer (220).

8. The self-damping conductor according to claim 4, characterized in that, The depth of the groove (221) is 3%-10% of the thickness of the first conductive layer (220).

9. The self-damping conductor according to claim 2, characterized in that, The first conductive layer (220) and the second conductive layer (230) are twisted in opposite directions.

10. The self-damping conductor according to claim 1, characterized in that, The load-bearing layer (100) is made of multiple load-bearing core wires twisted together.

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