Self-damping overhead conductor and method of making and installing same

Abstract

The present application relates to a kind of self-damping overhead conductor and its manufacturing and construction method, wherein the self-damping overhead conductor includes conductor;First shock-absorbing spring sheet layer is stranded in conductor;At least one intermediate layer is stranded in first shock-absorbing spring sheet layer;Intermediate layer includes first conductive layer and second shock-absorbing spring sheet layer stranded in first conductive layer, first conductive layer is stranded in first shock-absorbing spring sheet layer;Second conductive layer is stranded in the second shock-absorbing spring sheet layer of intermediate layer;Wherein, first shock-absorbing spring sheet layer and second shock-absorbing spring sheet layer all include second reinforcing core and at least one spring sheet concentrically stranded with second reinforcing core.The conductor provided by the present application has the functions of self-damping, safety, energy saving, low sag, low wind pressure, large use span, etc.

Description

TECHNICAL FIELD

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

[0002] High-frequency low-amplitude wind vibration can cause conductor fatigue breakage, fitting wear, tower component damage and other faults, which seriously threatens the safe operation of the transmission line (especially large span).

[0003] In recent years, large-span transmission line projects are also increasing and becoming larger. Maintaining the stable operation of large-span transmission lines and ensuring the safety of the power grid will be a very important problem for line workers.

[0004] At present, it is generally believed that the energy of the wind vibration is dissipated by the self-damping, damper and damping line of the transmission conductor. When the wind input energy is constant, the installation position and number of the damper and damping line are determined by the self-damping power of the transmission conductor.

[0005] However, unlike ordinary span transmission line conductors, large-span conductor steel cores and aluminum strands have many layers and complex spiral patterns, and the conductor cross-sectional area and bending stiffness are larger, and the energy dissipation mechanism is very complex. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application discloses a self-damping overhead conductor and a manufacturing and construction method thereof.

[0007] The technical solution adopted by the present application is as follows:

[0008] A self-damping overhead conductor comprises:

[0009] a conductor;

[0010] a first damping spring sheet layer twisted on the conductor;

[0011] at least one intermediate layer twisted on the first damping spring sheet layer; the intermediate layer comprises a first conductive layer and a second damping spring sheet layer twisted on the first conductive layer, and the first conductive layer is twisted on the first damping spring sheet layer;

[0012] a second conductive layer twisted on the second damping spring sheet layer of the intermediate layer;

[0013] wherein the first damping spring sheet layer and the second damping spring sheet layer each comprise a second reinforcing core and at least one spring sheet concentrically twisted with the second reinforcing core.

[0014] In some embodiments, the conductor comprises a core wire and at least one first reinforcing core concentrically twisted outside the core wire.

[0015] In some embodiments, the first reinforcing core has six strands, which are twisted together to form a reinforcing layer, the reinforcing layer being twisted in the opposite direction to the adjacent first damping spring sheet layer.

[0016] In some embodiments, the first reinforcing core has eighteen strands, of which six strands are twisted together to form a first reinforcing layer and twelve strands are twisted together to form a second reinforcing layer, wherein the twisting direction of the second reinforcing layer is opposite to the twisting direction of the adjacent first damping spring sheet layer.

[0017] In some embodiments, both the first conductive layer and the second conductive layer include one or more layers of strand units that abut against each other.

[0018] In some embodiments, the strand unit of the first conductive layer includes a first body, one side of the first body protrudes along the diameter direction of the first body to form a protrusion, and the other side of the first body is recessed along the diameter direction of the first body to form a groove, and two adjacent protrusions and grooves of the first body abut against each other.

[0019] 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 two adjacent protrusions and grooves of the second body abut against each other; one or more arc-shaped grooves are formed on the outer surface of the second body, and the recessing direction of the arc-shaped grooves is along the thickness direction of the second body.

[0020] In some embodiments, the stranding direction of the second damping spring sheet layer is opposite to that of the stranding direction of the second conductive layer.

[0021] 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. The connecting layer includes a plurality of spring sheet connecting units that overlap to form an annular shape. The spring sheet connecting unit includes a flexible body, and the flexible body has a snap-fit ​​portion and a fastening portion on both sides. The snap-fit ​​portion and the fastening portion are both provided with an opening, and the opening orientation of the snap-fit ​​portion is opposite to the opening orientation of the fastening portion. The snap-fit ​​portion and the fastening portion of two adjacent spring sheet connecting units are fastened together.

[0022] A construction method for a self-damping overhead conductor as described above includes the following steps:

[0023] Cut and strip the self-damping overhead wire according to the preset length until the conductor is exposed;

[0024] After the conductor of the self-damping overhead conductor is fixed by the steel anchor, the steel anchor is provided with a filler, and the steel anchor and the conductor are provided with a pressing member on the outer side.

[0025] A manufacturing method of a self-damping overhead conductor, comprising the following steps:

[0026] Twist a first damping spring sheet layer, and twist the first damping spring sheet layer to the conductor;

[0027] Draw and age treat the metal rod to obtain a first metal wire and a second metal wire, respectively;

[0028] Twist a plurality of first metal wires to obtain a first conductive layer, twist a second damping spring sheet layer, twist the second damping spring sheet layer to the first conductive layer to obtain an intermediate layer, and twist the first conductive layer of the intermediate layer to the first damping spring sheet layer;

[0029] Twist a plurality of second metal wires to obtain a second conductive layer, and twist the second conductive layer to the intermediate layer.

[0030] The above technical solution of the self-damping overhead conductor has the following advantages compared with the prior art:

[0031] The self-damping overhead conductor disclosed by the application is prepared by concentrically twisting a pre-stressed high-strength galvanized steel wire into a reinforcing core of the conductor, concentrically twisting one or more damping spring sheets outside the reinforcing core, and then concentrically twisting one or more high-strength aluminum alloy wire strands with a conductivity of 57.5% IACS outside the damping spring sheets to prepare the conductor, and the second conductive layer is designed as a high-strength aluminum alloy wire strand with a conductivity of 57.5% IACS as a special-shaped wire structure with a plurality of arc-shaped grooves on the outer side, and the above design makes the conductor have the functions of self-damping, safety, energy saving, low sag, low wind pressure, large use span, etc. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to make the content of the application more easily understood, the application will be further described in detail below according to specific embodiments of the application and in conjunction with the drawings.

[0033] Figure 1 is a schematic view of a self-damping overhead conductor in the application.

[0034] Figure 2 is a top view of a left-twisted spring sheet in the application.

[0035] Figure 3 is a top view of a right-twisted spring sheet in the application.

[0036] Figure 4 is a front view of a spring sheet connecting unit in the application.

[0037] Figure 5 is the flow chart of making self-damping overhead conductor in the present invention.

[0038] Figure 6 is the schematic diagram of aluminum alloy profile wire pulling process in the present invention.

[0039] Figure 7 is the front view of spring sheet stranding machine in the present invention.

[0040] Figure 8 is the side view of spring sheet stranding machine in the present invention.

[0041] Figure 9 is the profile wire tooling schematic diagram for conductive layer in the present invention.

[0042] Figure 10 is Figure 9 the schematic diagram of right stranding layer distribution plate for the first conductive layer in the present invention.

[0043] Figure 11 is Figure 9 the schematic diagram of right stranding layer distribution plate for the second conductive layer in the present invention.

[0044] Figure 12 is Figure 9 the schematic diagram of left stranding layer distribution plate for the first conductive layer in the present invention.

[0045] Figure 13 is Figure 9 the schematic diagram of left stranding layer distribution plate for the second conductive layer in the present invention.

[0046] Figure 14 is Figure 9 the front view of pressing wheel in the present invention.

[0047] Figure 15 is Figure 9 the side view of pressing wheel in the present invention.

[0048] Figure 16 is the construction schematic diagram of self-damping overhead conductor in the present invention.

[0049] Figure 17 is Figure 16 the front view of filling piece in the present invention.

[0050] Figure 18 is Figure 16 the side view of filling piece in the present invention.

[0051] The description of the drawings is as follows: 1, conductor; 2, first damping spring sheet layer; 3, first conductive layer; 4, second damping spring sheet layer; 5, second conductive layer; 6, connecting layer; 601, clamping part; 602, buckling part; 7, left twisted spring sheet; 8, right twisted spring sheet; 9, first winch; 10, channel; 11, spring sheet unwinding reel; 12, guide; 13, rack; 14, distribution board; 1401, first guide nozzle; 1402, second guide nozzle; 1403, third guide nozzle; 1404, fourth guide nozzle; 15, pressure roller; 16, filling piece; 17, anchor rod; 18, pull rod; 19, compression piece. DETAILED DESCRIPTION

[0052] The present application will be further described below with reference to the drawings and specific embodiments, so that those skilled in the art can better understand the present application and implement it. The embodiments are not intended to limit the present application.

[0053] The foregoing and other technical contents, features and effects of the present application will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only with reference to the direction of the drawings. Therefore, the directional terms used are used to illustrate and not to limit the present application, and in all embodiments, the same reference numerals represent the same elements.

[0054] Example 1

[0055] Referring to Figure 1 As shown in the drawings, a self-damping overhead conductor includes:

[0056] Conductor 1;

[0057] First damping spring sheet layer 2 twisted to conductor 1;

[0058] At least one intermediate layer twisted to first damping spring sheet layer 2; the intermediate layer includes first conductive layer 3 and second damping spring sheet layer 4 twisted to first conductive layer 3, and first conductive layer 3 is twisted to first damping spring sheet layer 2.

[0059] Second conductive layer 5 twisted to second damping spring sheet layer 4 of the intermediate layer; wherein first damping spring sheet layer 2 and second damping spring sheet layer 4 each include a second reinforcing core and at least one spring sheet twisted concentrically with the second reinforcing core.

[0060] The conductor 1 comprises a core wire and at least one layer of first reinforcing core concentrically stranded outside the core wire. In the embodiment, the conductor 1 is a stranded first reinforcing core with a 1000-hour relaxation rate ≤2.5% and a straightening test ≤25 mm, which is prepared by taking one or two layers of pre-stressed high-strength galvanized steel wire as the first reinforcing core and concentrically stranding the same outside a core wire of pre-stressed high-strength galvanized steel wire.

[0061] When the first reinforcing core has six, the six first reinforcing cores are stranded to form a reinforcing layer, and the pitch ratio of the stranded layer of the six first reinforcing cores is 16-26. The reinforcing layer is opposite to the stranding direction of the adjacent first shock-absorbing spring sheet layer 2.

[0062] When the first reinforcing core has eighteen, six of which are stranded to form a first reinforcing layer, and twelve of which are stranded to form a second reinforcing layer. The pitch ratio of the first reinforcing layer is 16-26, and the pitch ratio of the second reinforcing layer is 16-22. The stranding direction of the second reinforcing layer is opposite to that of the adjacent first shock-absorbing spring sheet layer 2.

[0063] 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 sheet layer 2. The connecting layer 6 comprises a plurality of spring sheet connecting units which are overlapped to form a ring. Each spring sheet connecting unit comprises a flexible main body, and the two sides of the flexible main body are respectively provided with a clamping portion 601 and a buckling portion 602. 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 that of the buckling portion 602. The clamping portion 601 and the buckling portion 602 of adjacent two spring sheet connecting units are buckled.

[0064] When the second shock-absorbing spring sheet layer 4 is adjacent to the second conductive layer 5, the stranding direction of the second shock-absorbing spring sheet layer 4 is opposite to that of the second conductive layer 5. The stranding direction of the rest of the intermediate layers meets the requirement of being opposite to that of the adjacent layer. The pitch ratio of the first shock-absorbing spring sheet layer 2 and the second shock-absorbing spring sheet layer 4 both meet the requirement of 10-16.

[0065] The first conductive layer 3 and the second conductive layer 5 each comprise one or more layers of wire strand units which are in abutment with each other. Preferably, the wire strand unit is a high-strength aluminum alloy wire strand with a conductivity of 57.5% IACS.

[0066] The wire 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 recessed portion. The protruding portion and the recessed portion of adjacent two first main bodies are in abutment. Further, the pitch ratio of the first conductive layer 3 is 10-16.

[0067] The strand unit of the second conductive layer 5 includes a second body, one side of the second body protrudes to form a protruding portion along the diameter direction of the second body, the other side of the second body is recessed to form a recessed portion along the diameter direction of the second body, and the protruding portions and the recessed portions of two adjacent second bodies abut; one or more arc-shaped recesses are arranged on the outer surface of the second body, and the recessed direction of the arc-shaped recess is along the thickness direction of the second body. Further, the lay ratio of the second conductive layer 5 is 10-12.

[0068] When the second conductive layer 5 includes multiple layers of strands that abut each other, the lay direction of the second conductive layer 5 is right, the lay directions of the adjacent second damping spring sheet layer 4 and the second conductive layer 5 are arranged in opposite directions, and the lay ratio of the outer strand unit of the second conductive layer 5 is not greater than that of the adjacent inner strand unit.

[0069] It should be noted that the lay ratios of all the layers, i.e., the lay ratio of the conductor 1, the lay ratio of the first damping spring sheet layer 2, the lay ratio of the intermediate layer, and the lay ratio of the second conductive layer 5, all satisfy that the outer layer is not greater than the adjacent inner layer. It can be understood that since each layer is not limited to a single layer, this limitation is made.

[0070] The design principle of the embodiment is as follows:

[0071] The conductor 1, the first conductive layer 3, and the second conductive layer 5 are closely arranged with a layer of damping spring sheets. When high-frequency wind blows, the wind vibration of the conductor wire is consumed through the collision between the conductive layer and the damping spring sheet, thereby improving the damping performance of the conductor wire and protecting the surface of the conductor wire to avoid mechanical damage to the surface of the conductor wire caused by long-term high-frequency collision.

[0072] Since the conductor wire is made of high-strength aluminum alloy wire with a conductivity of 57.5% IACS and a pre-stressed high-strength galvanized steel core, the elongation rates of the two materials are basically the same, so the tensile strength of the galvanized steel core can be fully used for the conductor wire, and the core wire uses a pre-stressed G5A galvanized steel core, which has the same tensile strength as the conventional G5A galvanized steel core and can reach 1820MPa-1960MPa.

[0073] The outer 57.5% IACS high-conductivity high-strength aluminum alloy conductive layer is made of one or more layers of 57.5% IACS high-conductivity high-strength aluminum alloy strands concentrically stranded, and compared with the same specification ordinary 52.5% IACS high-strength aluminum alloy material, under the same transmission capacity, the energy loss of a single single-split transmission line can be reduced by more than 10%.

[0074] The prestressed treated extra high strength galvanized steel core eliminates the initial elongation of the reinforcing core through a special process, so that the reinforcing core has the performance of 1000 hour relaxation rate ≤2.5% and straightening test ≤25mm without loss of mechanical strength, and the core wire of the conductor 1 is in close contact with the conductive layer, so that all the forces borne by the wire during the stringing construction process are applied to the reinforcing core, thus the wire inflection point is clear and the high temperature low sag effect can be achieved.

[0075] The outer layer of the wire is a 57.5% IACS high-conductivity high-strength aluminum alloy wire, and the outer shape of the second conductive layer 5 is specially designed, each single wire surface has a plurality of arc-shaped grooves, and the arc-shaped grooves have the effect of reducing wind pressure, so that the wind pressure of the wire can be reduced to 1.0 or less in windy weather.

[0076] The wire of the first conductive layer 3 and the second conductive layer 5 adopts a high-strength aluminum alloy wire with a conductivity of 57.5% IACS matched with a prestressed treated extra high strength galvanized steel core, and the tensile strength of the two materials is relatively high, the tensile strength of the high-conductivity aluminum alloy material is ≥325MPa, and the tensile strength of the G5A galvanized steel wire is 1820MPa-1960MPa, so as to meet the safe use of the wire in large span.

[0077] Example 2:

[0078] As shown in Figure 5 , a manufacturing method of a self-damping overhead conductor includes the following steps:

[0079] The first damping spring sheet layer 2 is twisted, and the first damping spring sheet layer 2 is twisted on the conductor 1;

[0080] The metal rod is drawn and aged to obtain the first metal wire and the second metal wire;

[0081] A plurality of first metal wires are twisted to obtain the first conductive layer 3, a second damping spring sheet layer 4 is twisted, the second damping spring sheet layer 4 is twisted on the first conductive layer 3 to obtain the intermediate layer, and the first conductive layer 3 of the intermediate layer is twisted on the first damping spring sheet layer 2;

[0082] A plurality of second metal wires are twisted to obtain the second conductive layer 5, and the second conductive layer 5 is twisted on the intermediate layer.

[0083] Specifically,

[0084] (1) Alloy element ratio. By controlling the purity of aluminum ingot and sensitive impurity elements, the electrical conductivity and mechanical properties of the material matrix are improved.

[0085] (2) Optimization of continuous casting and rolling process

[0086] The high-strength aluminum alloy material with the conductivity of 57.5% IACS is compared with the existing aluminum alloy material with the conductivity of 52.5% IACS, a proper amount of rare earth alloy elements 0.01%-0.015% is added before the furnace, the conductivity of the rolled rod is improved, the aluminum titanium boron alloy wire feeding online treatment step is added at the flow tank part of the continuous casting and rolling process, the speed is 2.0-2.4 m / min, the aluminum titanium boron alloy product is the best refining agent for aluminum and aluminum alloy at present, which can prevent the formation of coarse equiaxed crystal, columnar crystal and feathered crystal, and improve the mechanical properties and physical properties of aluminum and aluminum alloy. And sampling in the flow tank during production, real-time monitoring of alloy composition in the flow tank, increasing the stability of aluminum alloy rod,

[0087] The rolling-in temperature and the casting temperature are improved, and the specific indexes are shown in Table 1.

[0088] Table 1 Rolling-in temperature and casting temperature

[0089] Item Process control Rolling-in temperature °C 560±10 Pouring temperature °C 700±5

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

[0091] Process scheme

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

[0093] Table 2 First heat treatment process

[0094] Heat treatment temperature °C Heat treatment time h 250±10 10±2

[0095] Table 3 Second heat treatment process

[0096] Heat treatment temperature °C Heat treatment time h 200±5 8±1

[0097] First drawing: After the aluminum alloy rod with the conductivity of 57.5% IACS is plastically processed by 4-5 passes of the drawing die, the aluminum alloy rod changes from a circular shape to an oval shape as shown in Figure 6 The resistivity and tensile strength of the drawn aluminum alloy oval wire are improved. In order to achieve high conductivity, the aluminum alloy wire needs to be annealed after 4-5 passes of the first drawing, so that the resistivity and strength of the annealed aluminum alloy wire are reduced. In order to achieve high conductivity, the strength is reduced to ensure subsequent re-drawing, so as to prevent wire breakage and difficulty in drawing during the drawing process.

[0098] Second drawing: After the aluminum alloy oval wire is plastically processed by 4-5 passes of the drawing die, the aluminum alloy rod changes from an oval shape to a special shape as shown in Figure 6As shown, the resistivity and tensile strength of the profiled aluminum alloy wire can still be improved; similarly, to achieve high conductivity performance, the wire needs to be annealed in the aging furnace after 4-5 passes of the second drawing; the annealed aluminum alloy wire can achieve a reduction in resistivity and strength, and the reduction in resistivity is to achieve high conductivity, and the reduction in strength is to ensure subsequent re-drawing of the wire, so as to prevent the wire from breaking or being unable to be drawn due to the high strength of the single wire.

[0099] Third drawing: the profiled aluminum alloy wire is subjected to plastic processing through 2-3 passes of the wire drawing die, and the target specification of the profiled single wire, i.e., the wire strand unit required by the first conductive layer 3 or the wire strand unit required by the second conductive layer 5, can be obtained. The profiled single wire can achieve high conductivity and high strength performance, and since the profiled wire does not need to be heat treated before being wound on the machine, the surface of the single wire is not dry and rough, so compared with the traditional aluminum alloy wire, the wire twisting process avoids the scratching of the single wire.

[0100] (4) Twisting the shock absorbing spring sheet layer, i.e., the first shock absorbing spring sheet layer 2 and the second shock absorbing spring sheet layer 4, and the specific process scheme is as follows:

[0101] As shown in the left-twisted spring sheet 7 shown in Figure 2 and the right-twisted spring sheet 8 shown in Figure 3 , the shock absorbing spring sheet twisting machine shown in Figure 7 and Figure 8 , and setting a reasonable pitch ratio such as 10-16, the shock absorbing spring sheet is tightly twisted on the conductor 1 or the adjacent first conductive layer 3. Among them, the shock absorbing spring sheet twisting machine includes a first winch 9, a plurality of spring sheet unwinding discs 11 and a plurality of guide pieces 12, the first winch 9 is installed on the machine frame 13, the center of the first winch 9 is provided with a passage 10 through which the conductor 1 passes, and the first winch 9 rotates around itself, the plurality of spring sheet unwinding discs 11 and the plurality of guide pieces 12 are installed on the first winch 9, the guide pieces 12 are used to change the movement direction of the spring sheet, so the number of spring sheet unwinding discs 11 is the same as the number of guide pieces 12. Further, the plurality of spring sheet unwinding discs 11 and the plurality of guide pieces 12 are uniformly arranged on the first winch 9.

[0102] The main purpose of twisting the shock absorbing spring sheet layer is as follows:

[0103] When high-frequency wind blows, the wind vibration of the conductor wire is consumed through the mutual collision of the conductive layer and the high-elasticity high-temperature-resistant shock absorbing spring sheet, which improves the damping performance of the conductor wire and protects the surface of the conductor wire, avoiding mechanical damage to the surface of the conductor wire caused by long-term high-frequency collision.

[0104] (5) Twisting the conductive layer

[0105] As shown in Figure 9As shown, the twisting tool for the conductive layer includes a wire distribution plate 14 and a pressing wheel 15 on both sides of the wire distribution plate 14. The wire distribution plate 14 is provided with a plurality of guide nozzles along the circumference thereof. The guide nozzles are enlarged by 2-3 mm according to the shape and size of the strand unit. If the first conductive layer 3 is right-twisted, the first guide nozzle 1401 as shown in Figure 10 may be used. If the second conductive layer 5 is right-twisted, the second guide nozzle 1402 as shown in Figure 11 may be used. If the first conductive layer 3 is left-twisted, the third guide nozzle 1403 as shown in Figure 12 may be used. If the second conductive layer 5 is left-twisted, the fourth guide nozzle 1404 as shown in Figure 13 may be used.

[0106] In combination with Figure 14 and Figure 15 , the pressing wheel 15 is provided with a groove. The width and depth of the groove are enlarged by 2-3 mm according to the width and height of the strand unit. The pressing wheel 15 can be lifted up and down to facilitate threading. After being pressed and fixed, the pressing wheel 15 can be prevented from loosening during the production process, so as to ensure the smooth passing of the strand unit and avoid the situation of turning over and jumping.

[0107] Embodiment 3

[0108] A construction method of the self-damping overhead conductor provided in Embodiment 1 comprises the following steps:

[0109] The self-damping overhead conductor is cut and stripped according to the preset length until the conductor 1 is exposed.

[0110] After the conductor 1 of the self-damping overhead conductor is fixed by the steel anchor and the line is tightened to the specified sag, the steel anchor is provided with a filler 16, and the outer side of the steel anchor and the conductor 1 is provided with a pressing member 19. As shown in Figure 16 , the steel anchor comprises an integrated anchor rod 17 and a pull rod 18. The diameter of the pull rod 18 is smaller than that of the anchor rod 17. The pull rod 18 abuts against the conductor 1 of the self-damping overhead conductor, and the anchor rod 17 is fixed to the power equipment. The filler 16 can be an aluminum pipe in a semi-ring shape as shown in Figure 17 and Figure 18 .

[0111] Specifically, the self-damping overhead conductor is applied, a new type of line selection is added for the large span area, the area with high frequency and low amplitude wind blowing all year round, the self-damping anti-micro wind vibration of the transmission line is realized, the high safety, low sag and low wind pressure are realized, and the purpose of effectively reducing the line energy loss is realized, the first damping spring sheet layer 2 is added between the conductor 1 and the first conductive layer 3, the second damping spring sheet layer 4 is added between the first conductive layer 3 and the second conductive layer 5, and the second conductive layer 5 is prepared as a special-shaped wire with a plurality of arc-shaped groove structures on the outer side, the influence of the conductor micro wind vibration, icing, wind deviation and strong wind dancing is reduced, the construction period and construction cost of the line are reduced while the conductor is applied in multiple scenes, and the safety and reliability of the line operation is increased.

[0112] In the description of the embodiments of the application, it should also be noted that, unless otherwise explicitly specified and limited, if the terms "set", "connected" appear, they should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0113] Obviously, the above embodiments are only examples for clearly illustrating, and are not limited to the implementation. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the implementation is not required and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the application.

Claims

1. A self-damping overhead conductor, characterized in that, include: Conductor (1); The first damping spring sheet (2) is twisted to the conductor (1); At least one intermediate layer is stranded on the first damping spring sheet layer (2); the intermediate layer includes a first conductive layer (3) and a second damping spring sheet layer (4) stranded on the first conductive layer (3), wherein the first conductive layer (3) is stranded on the first damping spring sheet layer (2). The second conductive layer (5) is stranded with the second shock-absorbing spring sheet layer (4) of the intermediate layer. The first damping spring layer (2) and the second damping spring layer (4) each include a second reinforcing core and at least one spring sheet concentrically twisted with the second reinforcing core; 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 sheet layer (2). The connecting layer (6) includes a plurality of spring sheet connecting units that overlap to form an annular shape. The spring sheet connecting unit includes a flexible body. The flexible body has a snap-fit ​​part (601) and a fastening part (602) on both sides. The snap-fit ​​part (601) and the fastening part (602) are both provided with an opening. The opening of the snap-fit ​​part (601) is oriented in the opposite direction to the opening of the fastening part (602). The snap-fit ​​part (601) and the fastening part (602) of two adjacent spring sheet connecting units are fastened together.

2. The self-damping overhead conductor according to claim 1, characterized in that, The conductor (1) includes a core wire and at least one first reinforcing core concentrically stranded outside the core wire.

3. The self-damping overhead conductor according to claim 2, characterized in that, The first reinforcing core has six strands, which are twisted together to form a reinforcing layer. 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, The first reinforcing core has eighteen pieces, of which six pieces are twisted together to form a first reinforcing layer and twelve pieces are twisted together to form a second reinforcing layer. The twisting direction of the second reinforcing layer is opposite to that of the adjacent first damping spring sheet layer (2).

5. The self-damping overhead conductor according to claim 1, characterized in that, Both the first conductive layer (3) and the second conductive layer (5) include one or more layers of strand units that abut against each other.

6. The self-damping overhead conductor according to claim 5, characterized in that, The first conductive layer (3) includes a first body, one side of the first body protrudes along the diameter direction of the first body to form a protrusion, and the other side of the first body is recessed along the diameter direction of the first body to form a groove, and the protrusions and grooves of two adjacent first bodies abut each other.

7. The self-damping overhead conductor according to claim 5, characterized in that, The second conductive layer (5) 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. The protrusions and grooves of two adjacent second bodies abut each other. One or more arc-shaped grooves are formed on the outer surface of the second body, and the recess 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 twisting direction of the second damping spring sheet layer (4) is opposite to that of the second conductive layer (5).

9. A construction method using a self-damping overhead conductor as described in any one of claims 1-8, characterized in that... Includes the following steps: Cut and strip the self-damping overhead wire according to the preset length until the conductor is exposed (1). After the conductor (1) of the self-damping overhead conductor is fixed with a steel anchor and the conductor is tightened to the specified sag, a filler (16) is provided inside the steel anchor, and a clamping member (19) is installed on the outside of the steel anchor and the conductor (1).

10. A method for manufacturing a self-damping overhead conductor, characterized in that... Includes the following steps: The first damping spring sheet (2) is twisted and then twisted together with the conductor (1). The metal rod is drawn and aged to obtain the first metal wire and the second metal wire, respectively; Multiple first metal wires are twisted together to obtain a first conductive layer (3), a second shock-absorbing spring sheet layer (4) is twisted together, and the second shock-absorbing spring sheet layer (4) is twisted together with the first conductive layer (3) to obtain an intermediate layer, and the first conductive layer (3) of the intermediate layer is twisted together with the first shock-absorbing spring sheet layer (2). Multiple second metal wires are twisted together to obtain a second conductive layer (5), and the second conductive layer (5) is twisted together with the intermediate layer.

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