Self-damping overhead wire and manufacturing and construction method therefor

Abstract

The present invention relates to a self-damping overhead wire and a manufacturing and construction method therefor. The self-damping overhead wire comprises a conductor; a first damping spring piece layer, stranded onto the conductor; at least one intermediate layer, stranded onto the first damping spring piece layer, wherein the intermediate layer comprises a first conductive layer and a second damping spring piece layer stranded onto the first conductive layer, and the first conductive layer is stranded onto the first damping spring piece layer; and a second conductive layer, stranded onto the second damping spring piece layer of the intermediate layer, wherein the first damping spring piece layer and the second damping spring piece layer each comprise a second reinforcing core and at least one spring piece concentrically stranded onto the second reinforcing core. The wire provided by the present invention has the functions of self-damping, safety, energy saving, low sag, low wind pressure, large span and the like.

Description

Self-damping overhead conductor and its manufacturing and construction method Technical Field

[0001] The present invention relates to the technical field of overhead line power transmission, in particular to a self-damping overhead conductor and a manufacturing and construction method thereof. Background Art

[0002] High-frequency, low-amplitude breeze vibrations can cause conductor fatigue breakage, hardware wear, tower component damage and other faults, seriously threatening the safe operation of transmission lines (especially those with large spans).

[0003] In recent years, large-span transmission line projects have become more and more numerous and larger. Maintaining the stable operation of large-span transmission lines and ensuring the safety of the power grid will be a very important issue facing line workers.

[0004] Currently, it's generally believed that breeze vibration energy is dissipated by the self-damping of transmission lines, as well as by anti-vibration hardware such as anti-vibration hammers and damping wires. For a given breeze input energy, the location and number of anti-vibration hammers and damping wires are determined by the self-damping power of the transmission lines.

[0005] However, unlike transmission line conductors with ordinary spans, large-span conductors have many layers of steel core and aluminum strands, complex spiral shapes, large conductor cross-sectional area and bending stiffness, and their energy consumption mechanism is very complex.

[0006] Summary of the Invention

[0007] In view of the deficiencies in the prior art, the present invention discloses a self-damping overhead conductor and a manufacturing and construction method thereof.

[0008] The technical solutions adopted in the present invention are as follows:

[0009] A self-damping overhead conductor, comprising:

[0010] conductor;

[0011] a first damping spring leaf layer, twisted with the conductor;

[0012] At least one intermediate layer twisted with the first shock-absorbing spring layer; the intermediate layer includes a first conductive layer and a second shock-absorbing spring layer twisted with the first conductive layer, and the first conductive layer is twisted with the first shock-absorbing spring layer;

[0013] a second conductive layer, twisted with the second shock-absorbing spring leaf layer of the intermediate layer;

[0014] Wherein, the first shock-absorbing spring sheet layer and the second shock-absorbing spring sheet layer both include a second reinforcing core and at least one spring sheet twisted concentrically with the second reinforcing core.

[0015] In some embodiments, the conductor includes a core wire and at least one layer of a first strength core concentrically stranded outside the core wire.

[0016] In some embodiments, there are six first reinforcing cores, and the six first reinforcing cores are twisted together to form a reinforcing layer. The reinforcing layer has a twist direction opposite to that of the adjacent first shock-absorbing spring layer.

[0017] In some embodiments, there are eighteen first reinforcing cores, six of which are twisted to form a first reinforcing layer, and twelve of which are twisted to form a second reinforcing layer, wherein the twist direction of the second reinforcing layer is opposite to that of the adjacent first shock-absorbing spring leaf layer.

[0018] In some embodiments, the first conductive layer and the second conductive layer each include one or more layers of a plurality of mutually abutting strand units.

[0019] In some embodiments, the strand unit of the first conductive layer includes a first main body, one side of the first main body protrudes along the diameter direction of the first main body to form a protrusion, and the other side of the first main body is recessed along the diameter direction of the first main body to form a groove, and the protrusions and grooves of two adjacent first main bodies abut against each other.

[0020] In some embodiments, the strand unit of the second conductive layer includes a second body, one side of the second body protrudes along the diameter direction of the second body to form a protrusion, and the other side of the second body is recessed along the diameter direction of the second body to form a groove, and the protrusion and groove portions of two adjacent second bodies are abutted; one or more arc-shaped grooves are opened on the outer surface of the second body, and the recessed direction of the arc-shaped groove is along the thickness direction of the second body.

[0021] In some embodiments, the lay direction of the second damping spring layer is opposite to the lay direction of the second conductive layer.

[0022] In some embodiments, the outer surface of the conductor and the outer surface of the first conductive layer are both provided with a connecting layer for connecting the shock-absorbing spring sheet layer, and the connecting layer includes a plurality of spring sheet connection units that overlap to form a ring; wherein, the spring sheet connection unit includes a flexible main body, and a clamping portion and a buckling portion are respectively provided on both sides of the flexible main body, and the clamping portion and the buckling portion are both provided with an opening, and the opening direction of the clamping portion is opposite to the opening direction of the buckling portion, and the clamping portion and the buckling portion of two adjacent spring sheet connection units are buckled.

[0023] A construction method using the self-damping overhead conductor as described above comprises the following steps:

[0024] Cut and strip the self-damping overhead wire according to the preset length until the conductor is exposed;

[0025] After the conductor of the self-damping overhead conductor is fixed with a steel anchor and the line is tightened to the specified sag, a filler is provided inside the steel anchor, and a compression piece is installed on the outside of the steel anchor and the conductor.

[0026] A method for manufacturing a self-damping overhead conductor comprises the following steps:

[0027] Twisting a first damping spring layer, and twisting the first damping spring layer to a conductor;

[0028] Drawing and aging the metal rod to obtain a first metal wire and a second metal wire respectively;

[0029] Twisting a plurality of first metal wires to obtain a first conductive layer, twisting a second damping spring layer, twisting the second damping spring layer to the first conductive layer to obtain an intermediate layer, and twisting the first conductive layer of the intermediate layer to the first damping spring layer;

[0030] A plurality of second metal wires are twisted to obtain a second conductive layer, and the second conductive layer is twisted with the middle layer.

[0031] The above technical solution of the present invention has the following advantages over the prior art:

[0032] The self-damping overhead conductor described in the present invention is prepared by concentrically twisting prestressed ultra-high-strength galvanized steel wires to form a conductor load-bearing reinforcement core, concentrically twisting one or more layers of shock-absorbing spring sheets outside the reinforcement core, and concentrically twisting one or more layers of high-strength aluminum alloy wire strands with a conductivity of 57.5% IACS outside the shock-absorbing spring sheets to form the conductor. The second conductive layer is designed to be a high-strength aluminum alloy wire strand with a conductivity of 57.5% IACS, and is made into a special-shaped wire structure with multiple arc-shaped grooves on the outer side. The above design makes the conductor have the functions of self-damping, safety, energy saving, low sag, low wind pressure, and a large operating span. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0034] FIG1 is a schematic diagram of a self-damping overhead conductor in the present invention.

[0035] FIG2 is a schematic top view of a left-handed twisted spring leaf according to the present invention.

[0036] FIG3 is a schematic top view of a right-hand twisted spring leaf according to the present invention.

[0037] FIG4 is a schematic front view of the spring sheet connection unit of the present invention.

[0038] FIG5 is a flow chart of the process for producing a self-damping overhead conductor in the present invention.

[0039] FIG6 is a schematic diagram of the wire drawing process of the aluminum alloy special-shaped wire in the present invention.

[0040] FIG7 is a front view of the spring sheet twisting machine of the present invention.

[0041] FIG8 is a side view of the spring sheet twisting machine of the present invention.

[0042] FIG9 is a schematic diagram of a tooling for a special-shaped wire for a conductive layer in the present invention.

[0043] FIG10 is a schematic diagram of the first conductive layer right-hand twisted layer distribution board in FIG9.

[0044] FIG11 is a schematic diagram of the second conductive layer right-hand twisted layer distribution board in FIG9.

[0045] FIG12 is a schematic diagram of the first conductive layer left-twisted layer distribution board in FIG9.

[0046] FIG13 is a schematic diagram of the second conductive layer left-twisted layer distribution board in FIG9.

[0047] FIG14 is a front view of the pressure wheel in FIG9 .

[0048] FIG15 is a side view of the pressure wheel in FIG9 .

[0049] FIG16 is a schematic diagram of the construction of the self-damping overhead conductor in the present invention.

[0050] FIG. 17 is a front view of the filling piece in FIG. 16 .

[0051] FIG. 18 is a side view of the filler of FIG. 16 .

[0052] Explanation of the reference numerals in the specification: 1. conductor; 2. first shock-absorbing spring sheet layer; 3. first conductive layer; 4. second shock-absorbing spring sheet layer; 5. second conductive layer; 6. connecting layer; 601. clamping portion; 602. buckling portion; 7. left-twisted spring sheet; 8. right-twisted spring sheet; 9. first capstan; 10. channel; 11. spring sheet unwinding disc; 12. guide member; 13. frame; 14. distribution board; 1401. first guide nozzle; 1402. second guide nozzle; 1403. third guide nozzle; 1404. fourth guide nozzle; 15. pressure wheel; 16. filling member; 17. anchor rod; 18. pull rod; 19. pressing member. DETAILED DESCRIPTION

[0053] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0054] The foregoing and other technical aspects, features, and benefits of the present invention will be more clearly understood in the following detailed description of the embodiments with reference to the accompanying drawings. Directional terms such as up, down, left, right, front, and back, used in the following embodiments, are merely references to the accompanying drawings. Therefore, the directional terms used are for illustrative purposes only and are not intended to limit the present invention. Furthermore, throughout the embodiments, identical reference numerals denote identical elements.

[0055] Example 1:

[0056] Referring to FIG1 , a self-damping overhead conductor includes:

[0057] Conductor 1;

[0058] The first damping spring leaf layer 2 is twisted with the conductor 1;

[0059] At least one intermediate layer is twisted with the first shock-absorbing spring layer 2; the intermediate layer includes a first conductive layer 3 and a second shock-absorbing spring layer 4 twisted with the first conductive layer 3, and the first conductive layer 3 is twisted with the first shock-absorbing spring layer 2;

[0060] The second conductive layer 5 is twisted with the second shock-absorbing spring leaf layer 4 of the middle layer; wherein the first shock-absorbing spring leaf layer 2 and the second shock-absorbing spring leaf layer 4 both include a second reinforcing core and at least one spring leaf twisted concentrically with the second reinforcing core.

[0061] Conductor 1 comprises a core wire and at least one layer of a first strength member coaxially stranded around the core wire. In this embodiment, conductor 1 comprises a core wire of prestressed, ultra-high-strength galvanized steel wire, with one or two layers of prestressed, ultra-high-strength galvanized steel wire coaxially stranded around the outer layer. The stranded first strength member exhibits a 100-hour relaxation rate of ≤2.5%, a straightness test of ≤25 mm, and substantially no temperature-dependent sag.

[0062] When there are six first reinforcing cores, the six first reinforcing cores are twisted together to form a reinforcing layer. The pitch-to-diameter ratio of the twisted layer of the six first reinforcing cores is 16-26, and the twist direction of the reinforcing layer is opposite to that of the adjacent first damping spring sheet layer 2 .

[0063] When there are eighteen first reinforcing cores, six of them are twisted together to form a first reinforcing layer, and twelve of them are twisted together to form a second reinforcing layer. The pitch-to-diameter ratio of the first reinforcing layer is 16-26, and the pitch-to-diameter ratio of the second reinforcing layer is 16-22. The twist direction of the second reinforcing layer is opposite to the twist direction of the adjacent first shock-absorbing spring leaf layer 2.

[0064] The outer surface of the conductor 1 and the outer surface of the first conductive layer 3 are both provided with a connecting layer 6 for connecting the shock-absorbing spring leaf layer 2, and the connecting layer 6 includes a plurality of spring leaf connecting units that overlap to form a ring; wherein, the spring leaf connecting unit includes a flexible main body, and a clamping portion 601 and a buckling portion 602 are respectively provided on both sides of the flexible main body, and the clamping portion 601 and the buckling portion 602 are both provided with an opening, and the opening direction of the clamping portion 601 is opposite to the opening direction of the buckling portion 602, and the clamping portion 601 and the buckling portion 602 of two adjacent spring leaf connecting units are buckled.

[0065] When the second damping spring leaf layer 4 is adjacent to the second conductive layer 5, the twist direction of the second damping spring leaf layer 4 is arranged opposite to the twist direction of the second conductive layer 5. The second damping spring leaf layers 4 of the remaining intermediate layers meet the requirement of having a twist direction opposite to that of the adjacent layers; the pitch-to-diameter ratio of the first damping spring leaf layer 2 and the second damping spring leaf layer 4 both meet 10-16.

[0066] The first conductive layer 3 and the second conductive layer 5 each include one or more layers of a plurality of mutually abutting strand units. Preferably, the strand units are high-strength aluminum alloy strands with a conductivity of 57.5% IACS.

[0067] The strand units of the first conductive layer 3 include a first body, one side of which is convex along the diameter of the first body to form a protrusion, and the other side of which is concave along the diameter of the first body to form a groove. The protrusions and grooves of two adjacent first bodies abut against each other. Furthermore, the pitch-to-diameter ratio of the first conductive layer 3 is 10-16.

[0068] The strand units of the second conductive layer 5 include a second body, one side of which is convex along the diameter of the second body to form a protrusion, and the other side of which is concave along the diameter of the second body to form a groove. The protrusions and grooves of two adjacent second bodies abut against each other. The outer surface of the second body is provided with one or more arcuate grooves, which are concave along the thickness of the second body. Furthermore, the pitch-to-diameter ratio of the second conductive layer 5 is 10-12.

[0069] Among them, when the second conductive layer 5 includes multiple layers of wire strand units abutting each other, the twist direction of the second conductive layer 5 is right-handed, the twist directions of the adjacent second shock-absorbing spring leaf layers 4 and the second conductive layer 5 are arranged in opposite directions, and the pitch diameter ratio of the outer layer wire strand units of the second conductive layer 5 is not greater than that of the adjacent inner layer wire strand units.

[0070] It should be noted that the pitch-to-diameter ratios of all stranded layers, namely, the conductor 1, the first damping spring layer 2, the intermediate layer, and the second conductive layer 5, all satisfy the requirement that the outer layer is no greater than the adjacent inner layer. It is understood that this limitation is imposed because each stranded layer is not limited to a single layer.

[0071] The design principles of this embodiment are as follows:

[0072] A layer of shock-absorbing spring sheet is closely arranged between the conductor 1 and the first conductive layer 3, and between the first conductive layer 3 and the second conductive layer 5. When a high-frequency breeze blows, the breeze vibration generated by the wire consumes energy through the collision between the conductive layer and the shock-absorbing spring sheet, thereby improving the damping performance of the wire and protecting the wire surface, thereby avoiding mechanical damage to the wire surface caused by long-term high-frequency collision.

[0073] Since the conductor uses a high-strength aluminum alloy wire with a conductivity of 57.5% IACS and a prestressed ultra-high-strength galvanized steel core, the elongation of the two materials is basically the same, so the tensile strength of the galvanized steel core can be fully used for the conductor. In addition, the core wire uses a prestressed G5A galvanized steel core, which has the same tensile strength as conventional G5A galvanized steel core, reaching 1820MPa-1960MPa.

[0074] The external 57.5% IACS high-conductivity and high-strength aluminum alloy conductive layer is made of one or more layers of 57.5% IACS high-conductivity and high-strength aluminum alloy wire strands twisted concentrically. Compared with ordinary 52.5% IACS high-strength aluminum alloy materials of the same specifications, under the same transmission capacity, the energy loss of a single single-split transmission line can be reduced by more than 10%.

[0075] The prestressed ultra-high-strength galvanized steel core is processed through a special process to eliminate the initial elongation of the reinforcing core, so that the reinforcing core has a 100-hour relaxation rate of ≤2.5% and an elongation test of ≤25mm without losing mechanical strength. In addition, the core wire of conductor 1 is in close contact with the conductive layer. Therefore, during the wiring construction process, a special tightening method can be used to ensure that all the forces borne by the wire are applied to the reinforcing core. As a result, the wire inflection point is clear and the high-temperature low-sag effect can be achieved.

[0076] The outer shape of the outer layer of the conductor's outermost layer of 57.5% IACS high-conductivity and high-strength aluminum alloy wire, that is, the second conductive layer 5, has been specially designed. Each single wire has multiple arc-shaped grooves on the surface. The arc-shaped grooves have the function of reducing the wind pressure on the conductor, so the conductor can reduce the wind pressure to below 1.0 in windy weather.

[0077] The conductors of the first conductive layer 3 and the second conductive layer 5 are both made of high-strength aluminum alloy wire with a conductivity of 57.5% IACS and a prestressed ultra-high-strength galvanized steel core. Both materials have high tensile strength. The high-conductivity aluminum alloy material has a tensile strength of ≥325MPa; the G5A galvanized steel wire has a tensile strength of 1820MPa-1960MPa, which meets the safe use of large conductor spans.

[0078] Example 2:

[0079] As shown in FIG5 , a method for manufacturing a self-damping overhead conductor includes the following steps:

[0080] Twisting a first damping spring leaf layer 2, and twisting the first damping spring leaf layer 2 to the conductor 1;

[0081] Drawing and aging the metal rod to obtain a first metal wire and a second metal wire respectively;

[0082] Twisting a plurality of first metal wires to obtain a first conductive layer 3, twisting a second shock-absorbing spring layer 4, twisting the second shock-absorbing spring layer 4 to the first conductive layer 3 to obtain an intermediate layer, and twisting the first conductive layer 3 of the intermediate layer to the first shock-absorbing spring layer 2;

[0083] A plurality of second metal wires are twisted to obtain a second conductive layer 5, and the second conductive layer 5 is twisted into the middle layer.

[0084] Specifically,

[0085] (1) Alloy element ratio: By focusing on the control of the purity of aluminum ingots and sensitive impurity elements, the conductive properties and mechanical properties of the material matrix can be improved.

[0086] (2) Optimization of continuous casting and rolling processes

[0087] Compared with the existing aluminum alloy material with a conductivity of 52.5% IACS, the high-strength aluminum alloy material with a conductivity of 57.5% IACS has an appropriate amount of rare earth alloying elements (0.01%-0.015%) added before the furnace to improve the conductivity of the rolled rod. An online processing step of aluminum-titanium-boron alloy wire feeding has been added to the launder of the continuous casting and rolling process, with a speed of 2.0-2.4m / min. The aluminum-titanium-boron alloy product is currently the best refiner for aluminum and aluminum alloys. It can prevent the formation of coarse equiaxed crystals, columnar crystals and feathered crystals, and improve the mechanical and physical properties of aluminum and aluminum alloys. Samples are taken in the launder during the production process to monitor the alloy composition in the launder in real time, thereby increasing the stability of the aluminum alloy rod.

[0088] Increase the rolling temperature and casting temperature. The specific indicators are shown in Table 1.

[0089] Table 1 Rolling temperature and casting temperature

[0090] (3) Multiple drawing and aging of aluminum alloy rods

[0091] Process plan

[0092] The aluminum alloy rod with a conductivity of 57.5% IACS enters the aging furnace for heat treatment after the first drawing and the second drawing with a speed ratio of 1.18-1.28. After the second heat treatment, the rod is drawn with a speed ratio of 1.18-1.28 to the required specification and then put on the single wire coil for use.

[0093] Table 2 First heat treatment process

[0094] Table 3 Second heat treatment process

[0095] First Drawing: After 4-5 passes of plastic working through the wire drawing die, an aluminum alloy rod with a conductivity of 57.5% IACS transforms from a round shape to an elliptical shape, as shown in Figure 6. The resulting elliptical aluminum alloy wire exhibits increased resistivity and tensile strength. To achieve high conductivity, the wire is annealed in an aging furnace after the first 4-5 passes. This annealing treatment reduces both resistivity and strength. This reduction in resistance helps achieve high conductivity, while the reduction in strength ensures that the wire can be redrawn later, preventing breakage or loss of tensile strength during the drawing process due to excessive single-wire strength.

[0096] Second drawing: After the aluminum alloy elliptical wire undergoes 4-5 passes of plastic processing in the wire drawing die, the aluminum alloy rod changes from an elliptical shape to a special shape as shown in Figure 6. The resistivity and tensile strength of the special-shaped aluminum alloy wire will still increase. Similarly, in order to achieve high conductivity performance, it is necessary to enter the aging furnace for annealing after the second drawing 4-5 passes. The annealed aluminum alloy wire can achieve a reduction in resistivity and strength. The resistance is reduced to achieve high conductivity, and the strength is reduced to ensure the subsequent wire drawing to avoid the single wire strength being too high during the wire drawing process, which may cause the wire to break or become unpullable.

[0097] The third drawing: After 2-3 passes of plastic processing of the wire drawing die, the special-shaped aluminum alloy wire can obtain the target specification of the special-shaped single wire, that is, the wire strand unit required for the first conductive layer 3 or the wire strand unit required for the second conductive layer 5. The special-shaped single wire can achieve high conductivity and high strength performance. Moreover, since the special-shaped wire does not need to be heat treated before being put on the machine, the surface drying of the single wire is avoided. Therefore, compared with traditional aluminum alloy wire, the stranding process avoids the problem of single wire scratching.

[0098] (4) Twisting the shock-absorbing spring leaf layer, i.e., the first shock-absorbing spring leaf layer 2 and the second shock-absorbing spring leaf layer 4, the specific process scheme is as follows:

[0099] The left-handed twisted spring sheet 7 shown in FIG2 and the right-handed twisted spring sheet 8 shown in FIG3 are wound onto a shock-absorbing spring sheet twisting machine as shown in FIG7 and FIG8 . After being set to a reasonable pitch diameter, such as 10-16, they are tightly twisted onto the conductor 1 or the adjacent first conductive layer 3 . The shock-absorbing spring sheet twisting machine includes a first capstan 9, multiple spring sheet unwinding reels 11, and multiple guides 12. The first capstan 9 is mounted on a frame 13. A channel 10 is provided in the center of the first capstan 9 for the conductor 1 to pass through, and the first capstan 9 rotates around itself. The multiple spring sheet unwinding reels 11 and multiple guides 12 are all mounted on the first capstan 9. The guides 12 are used to change the direction of movement of the spring sheet, so the number of spring sheet unwinding reels 11 and the number of guides 12 are the same. Furthermore, the multiple spring sheet unwinding reels 11 and the multiple guides 12 are evenly arranged on the first capstan 9.

[0100] The main purposes of twisting the shock-absorbing spring layer are as follows:

[0101] When a high-frequency breeze blows, the breeze vibration of the wire consumes energy through the collision between the conductive layer and the highly elastic and high-temperature resistant shock-absorbing spring sheet, thereby improving the damping performance of the wire and protecting the wire surface, avoiding mechanical damage caused by long-term high-frequency collision on the wire surface.

[0102] (5) Twisted conductive layer

[0103] As shown in Figure 9, the tooling for twisting the conductive layer includes a wiring board 14 and pressure wheels 15 arranged on both sides of the wiring board 14. The wiring board 14 is provided with a plurality of guide nozzles along its circumference. The guide nozzles are proportionally enlarged by 2mm-3mm according to the shape and size of the wire strand unit. Among them, if the first conductive layer 3 is twisted in the right direction, the first guide nozzle 1401 shown in Figure 10 can be used; if the second conductive layer 5 is twisted in the right direction, the second guide nozzle 1402 shown in Figure 11 can be used; if the first conductive layer 3 is twisted in the left direction, the third guide nozzle 1403 shown in Figure 12 can be used; if the second conductive layer 5 is twisted in the left direction, the fourth guide nozzle 1404 shown in Figure 13 can be used.

[0104] 14 and 15 , the pressing wheel 15 is provided with a groove, the width and depth of which are proportionally enlarged by 2mm-3mm of the width and height of the wire strand unit. The pressing wheel 15 can be lifted up and down for easy threading, and can be fixed in position after being pressed down to avoid loosening of the pressing wheel 15 during the production process, thereby ensuring that the wire strand unit passes smoothly without turning over or jumping the wire.

[0105] Example 3:

[0106] A construction method using the self-damping overhead conductor provided in Example 1 comprises the following steps:

[0107] Cut and strip the self-damping overhead conductor according to a preset length until the conductor 1 is exposed;

[0108] After securing the conductor 1 of a self-damped overhead conductor with a steel anchor and tightening the conductor to a specified sag, a filler 16 is placed inside the anchor, and a compression member 19 is installed outside the anchor and conductor 1. As shown in Figure 16, the anchor comprises an integral anchor rod 17 and a tension rod 18. The tension rod 18 has a smaller diameter than the anchor rod 17. The tension rod 18 abuts the conductor 1 of the self-damped overhead conductor, and the anchor rod 17 is secured to the power equipment. Filler 16 can be a semi-annular aluminum tube, as shown in Figures 17 and 18.

[0109] Specifically, self-damping overhead conductors are put into use, adding a new type of line option for areas with large usage spans and areas with high frequency and low amplitude winds all year round, so as to achieve the purpose of self-damping of transmission lines against breeze vibration, high safety, low sag, and low wind pressure while effectively reducing line energy loss. A first shock-absorbing spring layer 2 is added between the conductor 1 and the first conductive layer 3, and a second shock-absorbing spring layer 4 is added between the first conductive layer 3 and the second conductive layer 5. The second conductive layer 5 is prepared as a special-shaped wire with multiple arc-shaped groove structures on the outside, which reduces the influence of breeze vibration, icing, wind deviation, and strong wind dancing on the conductor, realizes the application of conductors in multiple scenarios, reduces the construction period and construction cost of the line, and increases the safety and reliability of line operation.

[0110] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention.

[0111] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A self-damping overhead conductor, characterized in that: include: Conductor (1); A first damping spring sheet layer (2) twisted with the conductor (1); At least one intermediate layer twisted with the first shock-absorbing spring sheet layer (2); the intermediate layer comprises a first conductive layer (3) and a second shock-absorbing spring sheet layer (4) twisted with the first conductive layer (3), and the first conductive layer (3) is twisted with the first shock-absorbing spring sheet layer (2); A second conductive layer (5) twisted with a second shock-absorbing spring sheet layer (4) of the intermediate layer; Wherein, the first shock-absorbing spring sheet layer (2) and the second shock-absorbing spring sheet layer (4) both comprise a second reinforcing core and at least one spring sheet twisted coaxially with the second reinforcing core.

2. The self-damping overhead conductor according to claim 1, characterized in that: The conductor (1) comprises a core wire and at least one layer of a first reinforcing core coaxially twisted outside the core wire.

3. The self-damping overhead conductor according to claim 2, characterized in that: There are six first reinforcing cores, and the six first reinforcing cores are twisted together to form a reinforcing layer, wherein the reinforcing layer is twisted in the opposite direction to the adjacent first damping spring sheet layer (2).

4. The self-damping overhead conductor according to claim 2, characterized in that: There are eighteen first reinforcing cores, six of which are twisted together to form a first reinforcing layer, and twelve of which are twisted together to form a second reinforcing layer. The twist direction of the second reinforcing layer is opposite to the twist direction of the adjacent first damping spring sheet layer (2).

5. The self-damping overhead conductor according to claim 1, characterized in that: The first conductive layer (3) and the second conductive layer (5) both comprise one or more layers of a plurality of mutually abutting wire strand units.

6. The self-damping overhead conductor according to claim 5, characterized in that: The strand unit of the first conductive layer (3) comprises a first main body, one side of the first main body protrudes along the diameter direction of the first main body to form a protruding portion, and the other side of the first main body is recessed along the diameter direction of the first main body to form a groove portion, and the protruding portions and groove portions of two adjacent first main bodies are in abutment with each other.

7. The self-damping overhead conductor according to claim 5, characterized in that: The strand unit of the second conductive layer (5) comprises a second body, one side of the second body protrudes along the diameter direction of the second body to form a protruding portion, and the other side of the second body is recessed along the diameter direction of the second body to form a recessed portion, and the protruding portions and recessed portions of two adjacent second bodies are in contact with each other; and one or more arc-shaped grooves are provided on the outer surface of the second body, and the recessed direction of the arc-shaped grooves is along the thickness direction of the second body.

8. The self-damping overhead conductor according to claim 5, characterized in that: The twist direction of the second shock-absorbing spring sheet layer (4) is opposite to the twist direction of the second conductive layer (5).

9. The self-damping overhead conductor according to claim 1, characterized in that: The outer surface of the conductor (1) and the outer surface of the first conductive layer (3) are both provided with a connection layer (6) for connecting the shock-absorbing spring sheet layer (2), and the connection layer (6) includes a plurality of spring sheet connection units overlapped to form a ring shape; wherein the spring sheet connection unit includes a flexible body, and two sides of the flexible body are respectively provided with a clamping portion (601) and a buckling portion (602), and the clamping portion (601) and the buckling portion (602) are both provided with an opening, and the opening direction of the clamping portion (601) is opposite to the opening direction of the buckling portion (602), and the clamping portions (601) and the buckling portions (602) of two adjacent spring sheet connection units are buckled.

10. A construction method using the self-damping overhead conductor according to any one of claims 1 to 9, characterized in that The following steps are involved: Cutting and stripping the self-damping overhead wire according to a preset length until the conductor (1) is exposed; After a conductor (1) of a self-damping overhead wire is fixed by a steel anchor and the wire is tightened to a specified sag, a filling piece (16) is arranged inside the steel anchor, and a pressing piece (19) is installed outside the steel anchor and the conductor (1).

11. A method for manufacturing a self-damping overhead conductor, characterized in that The following steps are involved: Twisting a first damping spring sheet layer (2), and twisting the first damping spring sheet layer (2) with the conductor (1); Drawing and aging the metal rod to obtain a first metal wire and a second metal wire respectively; A plurality of first metal wires are twisted to obtain a first conductive layer (3), a second damping spring sheet layer (4) is twisted, the second damping spring sheet layer (4) is twisted with the first conductive layer (3) to obtain an intermediate layer, and the first conductive layer (3) of the intermediate layer is twisted with the first damping spring sheet layer (2); A plurality of second metal wires are twisted to obtain a second conductive layer (5), and the second conductive layer (5) is twisted with the intermediate layer.

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