Anti-corona pre-twisted spacer and installation method thereof

Abstract

The invention relates to an anti-corona pre-twisted spacer and an installation method thereof. The anti-corona pre-twisted spacer comprises an anti-corona spacer body and a pre-twisted wire. The anti-corona spacer body comprises a frame and a plurality of wire clamps, the plurality of wire clamps are arranged on the frame, the first end of each wire clamp is connected with the frame, the second end of each wire clamp extends to the outside of the frame, the second end of each wire clamp is provided with an anti-corona shell, and the anti-corona shell and the second end of each wire clamp jointly form an anti-corona cavity; a split conductor is arranged in each anti-corona cavity in a penetrating manner, and a pre-twisted wire is wound on the split conductor and the second end of the wire clamp and is positioned in the anti-corona cavity; the installation process comprises the following steps of: winding the pre-twisted wire; fixing the anti-corona shell with the anti-corona spacer and the split conductor; compared with an existing pre-twisted spacer, the anti-corona spacer has the advantages that the curvature radius is increased, meanwhile, the anti-corona shell can uniformly distribute an electric field, the surface field intensity of the pre-twisted wire and the anti-corona spacer body is reduced, and the anti-corona problem of the pre-twisted spacer in a high-voltage power transmission project is solved.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage power transmission, and in particular to an anti-corona type pre-twisted spacer rod and an installation method thereof. Background Art

[0002] The total mileage of my country's existing 110kV and above transmission lines has reached more than 655,000 kilometers, of which ultra-high voltage transmission lines above 500kV have reached more than 60,000 kilometers. As the core of the power system, transmission lines play an immeasurable role, but they also face higher requirements and greater challenges.

[0003] Spacers are used for split conductors of transmission lines of all voltage levels. The main purpose of spacers is to limit the relative movement between sub-conductors and maintain the geometric shape of the split conductors under normal circumstances. The mechanical strength of the spacers should be able to withstand the unbalanced tension of the conductors, sub-span oscillations, and the pulling and pressure between the sub-conductors applied by people on a single conductor. The spacers should have a firm grip on the conductors during normal operation or when the conductors are twisted.

[0004] Pre-twisted spacers are those that are fixed to the split conductors by pre-twisted wires, thereby increasing the contact area between the conductors and the hardware, which can effectively increase the gripping force. There are no internal stress concentration points in the contact area between the pre-twisted wires and the conductors, which can effectively disperse the internal static pressure of the hardware to a sufficiently large range. Therefore, it has been widely used in ice-covered lines, large-span lines, large-elevation-difference lines, and deserted areas.

[0005] The existing pre-twisted spacer is mainly composed of two parts: the spacer body and the pre-twisted wire. Since the surface curvature of the pre-twisted wire is large and the surface electric field distribution is uneven, the surface field strength of the pre-twisted spacer is large, which is prone to corona discharge and causes electromagnetic environment problems. Summary of the invention

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an anti-corona type pre-twisted spacer and its installation method, which has the advantage of being able to reduce the surface field strength of the pre-twisted spacer and meet the anti-corona problem of the pre-twisted spacer in high-voltage power transmission projects.

[0007] The above-mentioned inventive object of the present invention is achieved through the following technical solutions: on the one hand, the present invention provides an anti-corona type pre-twisted spacer, comprising an anti-corona spacer body and a pre-twisted wire; the anti-corona spacer body comprises a frame and a plurality of wire clamps, a plurality of the wire clamps are arranged on the frame, and a plurality of the wire clamps are arranged around the circumference of the frame, a first end of each of the wire clamps is connected to the frame, a second end of each of the wire clamps extends to the outside of the frame, an anti-corona shell is arranged on the second end of each of the wire clamps, and the anti-corona shell and the second end of the wire clamp together constitute an anti-corona cavity; a split conductor is passed through each of the anti-corona cavities, and the pre-twisted wire is wound around the split conductor and the second end of the wire clamp so that the split conductor is connected to the anti-corona spacer body through the pre-twisted wire, and the pre-twisted wire is located in the anti-corona cavity.

[0008] Preferably, the anti-corona type pre-twisted spacer provided by the present invention, the anti-corona shell includes a first spherical shell and two cylindrical shells, the two cylindrical shells are respectively arranged on opposite sides of the first spherical shell, one end of the two cylindrical shells are connected to the first spherical shell, and the other ends of the two cylindrical shells extend outward along the radial direction of the first spherical shell; each cylindrical shell is provided with a second spherical shell at one end away from the first spherical shell, the second spherical shell is connected to the cylindrical shell connected to it, and the end of the second spherical shell away from the cylindrical shell is open.

[0009] Preferably, in the anti-corona type pre-twisted spacer provided by the present invention, a clamp is provided in the second spherical shell, the clamp is sleeved on the split conductor, and the clamp is fastened to the split conductor by tightening the bolts on the clamp to reduce the inner diameter of the clamp.

[0010] Preferably, the anti-corona type pre-twisted spacer provided by the present invention, the anti-corona shell also includes at least two connecting plates, the two connecting plates are respectively arranged at the open ends of the two cylindrical shells, the edges on both sides of the open ends of the cylindrical shells are provided with screw holes, and the two ends of the connecting plate are respectively connected to the two screw holes by bolts.

[0011] Preferably, in the anti-corona type pre-twisted spacer provided by the present invention, the second end of the wire clamp is inserted into the first spherical shell, and the first spherical shell is connected to the wire clamp through a bracket.

[0012] Preferably, the anti-corona type pre-twisted spacer provided by the present invention, the bracket includes an inclined plate and a vertical plate, one end of the inclined plate is connected to one end of the vertical plate, the end of the inclined plate facing away from the vertical plate is connected to the open end of the first spherical shell, the vertical plate is attached to the outer side wall of the wire clamp, and the vertical plate is bolted to the wire clamp.

[0013] Preferably, in the anti-corona type pre-twisted spacer provided by the present invention, the length of the anti-corona shell is 1.05 to 1.2 times the length of the pre-twisted wire.

[0014] Preferably, the anti-corona type pre-twisted spacer provided by the present invention, the wire clamp includes a main body and a chuck, one end of the main body is connected to the frame, the chuck is provided at the end of the body away from the frame, the chuck is recessed inwardly to form an arc-shaped groove compatible with the splitting guide, and the chuck is provided with hanging ears on both opposite sides of the end away from the body.

[0015] Preferably, the anti-corona type pre-twisted spacer provided by the present invention has a frame in the shape of a regular hexagon.

[0016] On the other hand, the present invention provides a method for installing the anti-corona type pre-twisted spacer rod as described above, comprising the following steps:

[0017] The pre-twisted wire is wound around the second end of the wire clamp and wrapped together with the split conductor, with the end of the pre-twisted wire facing the inside of the split conductor;

[0018] The anti-corona shell is fixedly connected to the anti-corona spacer rod body and the split conductor.

[0019] In summary, the beneficial technical effects of the present invention are as follows: the anti-corona type pre-twisted spacer and its installation method provided by the present application, wherein the anti-corona type pre-twisted spacer comprises an anti-corona spacer body and a pre-twisted wire; the anti-corona spacer body comprises a frame and a plurality of wire clamps, the plurality of wire clamps are arranged on the frame, the plurality of wire clamps are arranged at intervals around the circumference of the frame, the first end of each wire clamp is connected to the frame, the second end of each wire clamp extends to the outside of the frame, an anti-corona shell is arranged on the second end of each wire clamp, and the anti-corona shell and the second end of the wire clamp together constitute an anti-corona cavity; each anti-corona cavity is penetrated by a split conductor, and the pre-twisted wire is wound around the split conductor and the second end of the wire clamp so that the split conductor is connected to the anti-corona spacer body through the pre-twisted wire, and the pre-twisted wire is located in the anti-corona cavity; the installation process is: winding the pre-twisted wire-the anti-corona shell is fixed with the anti-corona spacer and the split conductor; compared with the existing pre-twisted spacer, the anti-corona shell has a larger surface curvature radius that can evenly distribute the electric field, reduces the surface field strength of the pre-twisted wire and the anti-corona spacer body, improves the electrical performance, and meets the anti-corona problem of pre-twisted spacers in high-voltage power transmission projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the anti-corona type pre-twisted spacer rod provided in an embodiment of the present invention.

[0021] Figure 2It is a structural schematic diagram of an anti-corona spacer rod body in an anti-corona type pre-twisted spacer rod provided in an embodiment of the present invention.

[0022] Figure 3 It is a schematic diagram of the connection structure between the anti-corona type pre-twisted spacer body and the anti-corona shell in the anti-corona type pre-twisted spacer provided in an embodiment of the present invention.

[0023] Figure 4 It is a schematic diagram of the connection structure of the anti-corona type pre-twisted spacer body, the anti-corona shell, the split conductors and the pre-twisted wires in the anti-corona type pre-twisted spacer provided in an embodiment of the present invention.

[0024] Figure 5 This is the electric field cloud diagram of the pre-twisted wire surface in a conventional pre-twisted spacer.

[0025] Figure 6 It is a surface electric field cloud diagram of the pre-twisted wire in the anti-corona type pre-twisted spacer provided by an embodiment of the present invention.

[0026] Figure 7 It is a cloud diagram of the electric field on the surface of the anti-corona shell in the anti-corona type pre-twisted spacer provided in an embodiment of the present invention.

[0027] Figure 8 It is a flow chart of an installation method of an anti-corona type pre-twisted spacer rod provided by another embodiment of the present invention.

[0028] In the figure, 1. anti-corona type pre-twisted spacer; 10. anti-corona spacer body; 11. frame; 12. wire clamp; 121. chuck; 1211. arc groove; 1212. ear; 122. body; 20. pre-twisted wire; 30. anti-corona shell; 31. first spherical shell; 32. cylindrical shell; 33. second spherical shell; 34. clamp; 35. connecting plate; 36. bracket; 361. inclined plate; 362. vertical plate; 2. split conductor. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0030] Reference Figures 1 to 4, is an anti-corona type pre-twisted spacer 1 disclosed in the present invention, comprising an anti-corona spacer body 10 and a pre-twisted wire 20; the anti-corona spacer body 10 comprises a frame 11 and a plurality of wire clips 12, the plurality of wire clips 12 are arranged on the frame 11, the plurality of wire clips 12 are arranged around the circumference of the frame 11, the first end of each wire clip 12 is connected to the frame 11, the second end of each wire clip 12 is extended to the outside of the frame 11, and an anti-corona shell 30 is arranged on the second end of each wire clip 12, and the anti-corona shell 30 is connected to the wire clip 12 The second end of the anti-corona cavity is formed together; each anti-corona cavity is provided with a split conductor 2, and the pre-twisted wire 20 is wound around the split conductor 2 and the second end of the wire clamp 12, so that the split conductor 2 is connected to the anti-corona spacer body 10 through the pre-twisted wire 20, and the pre-twisted wire 20 is located in the anti-corona cavity; compared with the existing pre-twisted spacer, the anti-corona shell 30 can evenly distribute the electric field, reduce the surface field strength of the pre-twisted wire 20 and the anti-corona spacer body 10, improve the electrical performance, and meet the anti-corona problem of pre-twisted spacer in high-voltage power transmission projects.

[0031] Specifically, a plurality of wire clips 12 are disposed on the frame 11 and arranged in a radial pattern.

[0032] It should be noted that the number of the anti-corona shells 30 is consistent with the number of the wire clamps 12 , that is, an anti-corona shell 30 is provided outside each wire clamp 12 .

[0033] like Figure 2 As shown, the present embodiment makes full use of the frame 11 of the conventional six-split conductor 2 spacer rods, and the frame 11 can play a supporting role. The frame 114 is a regular hexagonal structure in which the conventional six-split conductor 2 spacer rods are embedded, that is, the frame 11 is a regular hexagon. The function of the frame 11 is to make the anti-corona spacer rods more evenly stressed and improve the mechanical properties of the anti-corona spacer rods. The wire clamp 12 is connected to the frame 11 to fix the split conductor 2, ensure sufficient wire splitting spacing, prevent the wire dancing and mutual whipping caused by the split conductor 2 being affected by the wind, and suppress breeze vibration and sub-spacing oscillation. A screw hole is set on each wire clamp 12, and the wire clamp 12 is fixed to the anti-corona shell 30 by bolts to ensure that the anti-corona shell 30 can be stably fixed on the wire clamp 12.

[0034] In an implementable manner in which the frame 11 is in a regular hexagonal shape, there are six wire clamps 12 , and ends of the six wire clamps 12 facing away from the anti-corona shell 30 are respectively connected to six corners of the frame 11 .

[0035] Furthermore, in the present embodiment, the anti-corona shell 30 comprises a first spherical shell 31 and two cylindrical shells 32, the two cylindrical shells 32 are respectively arranged on opposite sides of the first spherical shell 31, one end of the two cylindrical shells 32 are connected with the first spherical shell 31, and the other ends of the two cylindrical shells 32 extend radially outwardly along the first spherical shell 31; a second spherical shell 33 is arranged at one end of each cylindrical shell 32 away from the first spherical shell 31, the second spherical shell 33 is connected with the cylindrical shell 32 connected thereto, and the end of the second spherical shell 33 away from the cylindrical shell 32 is open; by providing the second spherical shell 33, the second spherical shell 33 can make the terminal electric field distribution more uniform, avoid the problem of uneven electric field distribution caused by sudden shape change, and at the same time make the terminal opening of the anti-corona shell 30 smaller, thereby playing a windproof role.

[0036] Specifically, Figure 4 Taking the orientation shown as an example, the bottom ends of the first spherical shell 31, the cylindrical shell 32 and the second spherical shell 33 are all open, which is convenient for the installation of the anti-corona type pre-twisted spacer 1. The second spherical shell 33 is connected to the first spherical shell 31 through the cylindrical shell 32. The center lines of the two cylindrical shells 32 are arranged in parallel. In some achievable ways, the center lines of the two cylindrical shells 32 are arranged in a collinear manner.

[0037] Specifically, the cylindrical shell 32 is bent from an aluminum alloy sheet, and its cross section is a smooth arc. The first spherical shell 31 and the second spherical shell 33 are both pressed from an aluminum alloy sheet. The first spherical shell 31 is welded to the cylindrical shell, and the second spherical shell 33 is welded to the cylindrical shell 32.

[0038] like Figure 4 As shown, in the present embodiment, the anti-corona shell 30 utilizes the characteristics of a relatively large curvature radius of a cylindrical structure and a low surface electric field, which can make the electric field distribution more even, and solves the problem of high surface field intensity and uneven electric field distribution caused by the insufficient surface curvature radius of the pre-twisted wire 20 of the original conventional pre-twisted spacer wire. In order to reduce and make the surface field intensity of the anti-corona shell 30 more even, its edge is set as a second spherical shell 33, that is, the edge is chamfered, and the burrs and rough places on its surface are polished to prevent the surface protrusion and burrs from distorting the surface electric field, and reduce the effect of reducing the surface field intensity.

[0039] like Figure 3As shown, the surface curvature radius of the second spherical shell 33 is R1, the surface curvature radius of the cylindrical shell 32 is R2, and the surface curvature radius of the first spherical shell 31 is R3. R1, R2, and R3 are 40 mm, 40 mm, and 80 mm, respectively. Compared with conventional pre-twisted spacers, the anti-corona type pre-twisted spacer 1 provided by the present invention can significantly reduce the surface field strength of the pre-twisted spacer. Figure 5 The figure shows the surface field strength of the conventional pre-twisted spacer at the most severe area. It can be seen that the maximum surface field strength of the pre-twisted wire 20 is 35.28 kV / cm. Figure 6 The surface electric field cloud diagram of the pre-twisted wire 20 in the anti-corona pre-twisted spacer 1 provided by the present invention is as follows: Figure 7 The electric field cloud diagram of the surface of the anti-corona shell 30 in the anti-corona type pre-twisted spacer 1 provided by the present invention shows that the field strength at the most severe surface of the pre-twisted spacer has been reduced to 12.58 kV / cm through the electrostatic shielding of the anti-corona shell 30, and the most severe surface field strength of the anti-corona type pre-twisted spacer 1 has been transferred from the pre-twisted wire 20 to the outside of the anti-corona shell 30, with a maximum surface field strength of 24.51 kV / cm. Compared with conventional pre-twisted spacers, the maximum surface field strength of the anti-corona type pre-twisted spacer 1 provided by the present invention is reduced by 43.94%, with significant effect.

[0040]

[0041] It can be seen that, compared with conventional pre-twisted spacers, the maximum electric field intensity on the surface of the anti-corona pre-twisted spacer 1 provided in this embodiment is reduced by more than 40%.

[0042] Furthermore, in the present embodiment, the second end of the wire clamp 12 is inserted into the first spherical shell 31, and the first spherical shell 31 is connected to the wire clamp 12 via a bracket 36; by covering the second end of the wire clamp 12 with the first spherical shell 31, the surface field strength of the wire clamp 12 can be effectively reduced while keeping a certain distance between the anti-corona shell 30 and the wire clamp 12, thereby preventing the anti-corona shell 30 from colliding with the wire clamp 12 and being damaged.

[0043] like Figure 4 As shown, in this embodiment, the first spherical shell 31 is fixedly connected to the wire clamp 12 via two brackets 36 . Of course, the first spherical shell 31 can also be fixedly connected to the wire clamp 12 via one bracket 36 or three brackets 36 .

[0044] Furthermore, in this embodiment, the bracket 36 includes an inclined plate 361 and a vertical plate 362, one end of the inclined plate 361 is connected to one end of the vertical plate 362, the end of the inclined plate 361 facing away from the vertical plate 362 is connected to the open end of the first spherical shell 31, the vertical plate 362 is attached to the outer wall of the wire clamp 12, and the vertical plate 362 is bolted to the wire clamp 12.

[0045] Furthermore, in the present embodiment, a clamp 34 is provided in the second spherical shell 33, and the clamp 34 is sleeved on the split conductor 2. The clamp 34 is fastened to the split conductor 2 by reducing the inner diameter of the clamp 34 by tightening the bolts on the clamp 34. By providing the clamp 34, the stability of the anti-corona shell 30 is improved, and the anti-corona shell 30 is prevented from colliding with the split conductor 2 and the anti-corona spacer rod body 10.

[0046] Specifically, the center line of the clamp 34 is colinear with the center line of the cylindrical shell 32 .

[0047] Furthermore, in the present embodiment, the anti-corona shell 30 also includes at least two connecting plates 35, which are respectively arranged at the open ends of the two cylindrical shells 32, and the edges on the opposite sides of the open ends of the cylindrical shells 32 are provided with screw holes, and the two ends of the connecting plates 35 are respectively connected to the two screw holes by bolts; by providing the connecting plates 35, the strength of the anti-corona shell 30 is improved, and the anti-corona shell 30 itself is prevented from being damaged by the harsh natural environment factors.

[0048] Specifically, via holes are respectively provided at opposite ends of the connection plate, and the via holes penetrate the connection plate. During the installation process, the via holes and the screw holes are arranged one by one, and one end of the bolt passes through the via holes and is threadedly connected with the screw holes.

[0049] It should be noted that at least one connecting plate 35 is disposed at the open end of each cylindrical shell 32 .

[0050] Furthermore, in this embodiment, the length of the anti-corona shell 30 is 1.05 to 1.2 times the length of the pre-twisted wire 20 .

[0051] Furthermore, in this embodiment, the wire clamp 12 includes a main body 122 and a clamp 121, one end of the main body 122 is connected to the frame 11, the clamp 121 is provided at the end of the main body 122 away from the frame 11, the clamp 121 is recessed inward to form an arc-shaped groove 1211 adapted to the splitting guide, and ears 1212 are provided on opposite sides of the end of the clamp 121 away from the main body 122.

[0052] The clamp 121 and the anti-corona shell 30 together form an anti-corona cavity, and the clamp 121 and the hanging ear 1212 are both located in the first spherical shell 31 .

[0053] Compared with conventional pre-twisted spacers, the present invention has lower anti-corona requirements for the anti-corona spacer body 10 and the pre-twisted wire 20. To reduce processing costs, the end of the pre-twisted wire 20 does not need to be finely processed into a duckbill shape, and its end can be polished into a hemispherical shape for ease of processing. Conventional pre-twisted spacers usually set the lug 1212 shorter to avoid the protrusion of the lug 1212 causing the surface field strength here to be too high. In order to strengthen the fixing strength of the pre-twisted wire 20 and the anti-corona spacer body 10, the length of the lug 1212 can be increased in this embodiment. It should be noted that the edge of the anti-corona spacer body 10 still needs to be chamfered and polished to remove burrs.

[0054] The installation process of the anti-corona pre-twisted spacer 1 provided in the present embodiment is as follows: the split conductor 2 is placed in the arc-shaped groove 1211, the pre-twisted wire 20 is wound around the split conductor 2 and the split conductor 2 and the wire clamp 12 are fixed by the hanging ear 1212, so as to ensure the spacing of the split conductor 2; the end of the pre-twisted wire 20 is facing the inside of the split conductor 2, the anti-corona shell 30 is buckled on the periphery of the split conductor 2, the pre-twisted wire 20 is located in the anti-corona shell 30, the first spherical shell 31 is fixed to the wire clamp 12 through the bracket 36 by bolts, and then the second end of the connecting plate 35 is fixed to the open end of the cylindrical shell 32 by bolts, and the clamp 34 in the second spherical shell 33 is fixed to the split conductor 2 by bolts.

[0055] 10. A method for installing the anti-corona type pre-twisted spacer rod 1 according to any one of claims 1 to 9, characterized in that it comprises the following steps:

[0056] S101 , wrap the pre-twisted wire 20 around the second end of the wire clamp 12 and wrap it together with the split conductor 2 , with the end of the pre-twisted wire 20 facing the inside of the split conductor 2 .

[0057] Specifically, the pre-twisted wire 20 is passed around the hanging ear 1212 on the wire clamp 12 and is wound together with the split conductor 2 , with the end of the pre-twisted wire 20 facing the inside of the split conductor 2 to prevent the field strength at the end of the pre-twisted wire 20 from being too large.

[0058] S102 , the anti-corona shell 30 is fixedly connected to the anti-corona spacer rod body 10 and the split conductor 2 .

[0059] Specifically, bolts are used to fix the first spherical shell 31 to the wire clamp 12 through the bracket 36 to ensure that the anti-corona shell 30 is stable and the unclosed part is facing the outside of the split conductor 2 to ensure the shielding effect on the pre-twisted wire 20 and the wire clamp 12; then the connecting plate 35 is fixed to the open end of the cylindrical shell 32 by bolts to reinforce the anti-corona shell 30 and prevent the anti-corona shell 30 from being damaged by the adverse natural environment factors; bolts are used to fix the clamp 34 to the split conductor 2 to stabilize the anti-corona shell 30 and avoid collision with the split conductor 2 and the anti-corona spacer rod body 10.

[0060] The present application provides an anti-corona type pre-twisted spacer 1 and an installation method thereof, wherein the anti-corona type pre-twisted spacer 1 comprises an anti-corona spacer body 10 and a pre-twisted wire 20; the anti-corona spacer body 10 comprises a frame 11 and a plurality of wire clips 12, the plurality of wire clips 12 are arranged on the frame 11, the plurality of wire clips 12 are arranged at intervals around the circumference of the frame 11, the first end of each wire clip 12 is connected to the frame 11, the second end of each wire clip 12 extends to the outside of the frame 11, and an anti-corona shell 30 is arranged on the second end of each wire clip 12, and the anti-corona shell 30 and the second end of the wire clip 12 together constitute an anti-corona cavity; Each anti-corona cavity is penetrated by a split conductor 2, and a pre-twisted wire 20 is wound around the split conductor 2 and the second end of the wire clamp 12, so that the split conductor 2 is connected to the anti-corona spacer body 10 through the pre-twisted wire 20, and the pre-twisted wire 20 is located in the anti-corona cavity; the installation process is: winding the pre-twisted wire 20-the anti-corona shell 30 is fixed to the anti-corona spacer and the split conductor 2; compared with the existing pre-twisted spacer, the anti-corona shell has a larger surface curvature radius that can evenly distribute the electric field, reduces the surface field strength of the pre-twisted wire 20 and the anti-corona spacer body 10, improves the electrical performance, and meets the anti-corona problem of the pre-twisted spacer in high-voltage power transmission projects.

[0061] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0062] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. An anti-corona type pre-twisted spacer, characterized in that: It includes an anti-corona spacer rod body and pre-twisted wire; The anti-corona spacer rod body comprises a frame and a plurality of wire clips, wherein the plurality of wire clips are arranged on the frame, and the plurality of wire clips are arranged at intervals around the circumference of the frame, wherein the first end of each wire clip is connected to the frame, and the second end of each wire clip extends to the outside of the frame, and an anti-corona shell is arranged on the second end of each wire clip, and the anti-corona shell and the second end of the wire clip together constitute an anti-corona cavity; Each of the anti-corona cavities is provided with a split conductor, and the pre-twisted wire is wound around the split conductor and the second end of the wire clamp so that the split conductor is connected to the anti-corona spacer body through the pre-twisted wire, and the pre-twisted wire is located in the anti-corona cavity.

2. The anti-corona type pre-twisted spacer according to claim 1, characterized in that: The anti-corona shell includes a first spherical shell and two cylindrical shells, the two cylindrical shells are respectively arranged on opposite sides of the first spherical shell, one end of the two cylindrical shells is connected to the first spherical shell, and the other ends of the two cylindrical shells extend outward along the radial direction of the first spherical shell; A second spherical shell is disposed at one end of each cylindrical shell away from the first spherical shell, the second spherical shell is communicated with the cylindrical shell connected thereto, and one end of the second spherical shell away from the cylindrical shell is open.

3. The anti-corona type pre-twisted spacer according to claim 2, characterized in that: A clamp is arranged in the second spherical shell, and the clamp is sleeved on the split conductor. The clamp is fastened to the split conductor by tightening the bolts on the clamp to reduce the inner diameter of the clamp.

4. The anti-corona type pre-twisted spacer according to any one of claims 2-3, characterized in that: The anti-corona shell also includes at least two connecting plates, which are respectively arranged at the open ends of the two cylindrical shells. The edges on the opposite sides of the open ends of the cylindrical shells are provided with screw holes, and the two ends of the connecting plates are respectively connected to the two screw holes by bolts.

5. The anti-corona type pre-twisted spacer according to claim 2, characterized in that: The second end of the wire clamp is inserted into the first spherical shell, and the first spherical shell is connected to the wire clamp through a bracket.

6. The anti-corona type pre-twisted spacer according to claim 5, characterized in that: The bracket includes an inclined plate and a vertical plate, one end of the inclined plate is connected to one end of the vertical plate, the end of the inclined plate facing away from the vertical plate is connected to the open end of the first spherical shell, the vertical plate is attached to the outer side wall of the wire clamp, and the vertical plate is bolted to the wire clamp.

7. The anti-corona type pre-twisted spacer according to claim 1, characterized in that: The length of the anti-corona shell is 1.05 to 1.2 times the length of the pre-twisted wire.

8. The anti-corona type pre-twisted spacer according to claim 1, characterized in that: The wire clamp includes a body and a clamp, one end of the body is connected to the frame, the clamp is provided at the end of the body away from the frame, the clamp is recessed inward to form an arc-shaped groove adapted to the split guide, and ears are provided on opposite sides of the end of the clamp away from the body.

9. The anti-corona type pre-twisted spacer according to claim 1, characterized in that: The frame is in the shape of a regular hexagon.

10. A method for installing the anti-corona type pre-twisted spacer according to any one of claims 1 to 9, characterized in that: The steps include: The pre-twisted wire is wound around the second end of the wire clamp and wrapped together with the split conductor, with the end of the pre-twisted wire facing the inside of the split conductor; The anti-corona shell is fixedly connected to the anti-corona spacer rod body and the split conductor.

Images