Corona ring for high-voltage device

Abstract

The invention belongs to the technical field of corona rings, and particularly relates to a corona ring for a high-voltage device, which comprises a connecting assembly, the connecting assembly is composed of two groups of connecting frames and a ring frame, the connecting frames are semicircular, the two groups of connecting frames are matched to form a coating piece, the ring frame is clamped on the outer sides of the two groups of connecting frames, and a shielding assembly is connected with the connecting frames. The high-voltage cable corona ring has the advantages that electromagnetic interference is prevented, safe operation of equipment is guaranteed, the integrally formed corona ring is converted into a structure of the connecting frame and the ring frame and is fixed through the positioning bolt group, connection stability of the corona ring on the high-voltage cable is guaranteed, and the ring frame is designed to be of a three-level gradient field modulation structure. According to the corona ring, a double mechanism of material characteristic change and active deformation responds to environment change, the self-adaptive capacity is high, meanwhile, a shielding ring and a connecting ring structure are additionally arranged on the basis of an original corona ring, a double-ring coupling electric field is formed between the shielding ring and the connecting ring, surface point location distribution is smoother, the double-ring coupling electric field generates a double-curvature effect, and a discharge path can be prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of corona rings, in particular to a corona ring for high-voltage devices. Background Art

[0002] In high-voltage power equipment (such as transformers, GIS, and high-voltage cable terminals), localized electric field concentration can lead to corona discharge, resulting in energy loss, insulation degradation, and even equipment failure. To optimize electric field distribution and suppress corona discharge, corona rings (also known as grading rings or shielding rings) are widely used at conductor connections or insulation weaknesses in high-voltage equipment.

[0003] Traditional corona rings are typically made of conductive metals (such as aluminum and copper) in an annular or ellipsoidal structure, reducing the surface electric field strength by increasing the electrode curvature radius. However, with the development of higher voltage levels (such as ultra-high voltage AC / DC systems) and compact equipment, existing corona rings are mostly single- or two-stage gradient field structures. They are unable to respond to environmental changes and have poor adaptability, which can easily lead to local field strength distortion during use. Therefore, there is an urgent need to provide a corona ring for high-voltage devices. Summary of the Invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid blurring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0005] Therefore, the purpose of the present invention is to provide a corona ring for a high-voltage device, which transforms the one-piece corona ring into a connecting frame and a ring frame structure, and fixes it through a positioning bolt group, thereby ensuring the connection stability of the corona ring on the high-voltage cable. In addition, by designing the ring frame as a three-level gradient field modulation structure, the dual mechanisms of material property changes and active deformation respond to environmental changes, and have strong adaptability.

[0006] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions: A corona ring for a high voltage device, comprising: The connecting assembly consists of two groups of connecting frames and a ring frame. The connecting frames are arranged in a semicircular shape. The two groups of connecting frames cooperate to form a covering member, and both ends of the connecting frames are integrally formed with a fixing plate. The ring frame is clamped on the outside of the two groups of connecting frames; The ring frame adopts a three-level gradient field modulation structure, which includes an inner conductive ring, a middle buffer layer and an outer shielding layer from the inside to the outside. The inner conductive ring adopts a microporous honeycomb aluminum-based composite material with a surface plasma oxidation treatment, and the middle buffer layer adopts boron nitride compound nanotubes. The ring frame adopts a double-helix Archimedean surface setting, and the edge adopts a ginkgo leaf vein fractal structure. As a preferred solution of the corona ring for high-voltage devices described in the present invention, in order to prevent electromagnetic interference and ensure safe operation of the equipment, a shielding component is connected to the outer side of the connecting frame.

[0007] As a preferred solution of the corona ring for high-voltage devices described in the present invention, the two groups of connecting frames are connected by a positioning bolt group, and the positioning bolt group is connected to the fixed plate to lock the two groups of upper and lower adjacent connecting frames.

[0008] As a preferred solution of the corona ring for high-voltage devices described in the present invention, a slot is provided on the outer side of the connecting frame at a position corresponding to the shielding component.

[0009] As a preferred solution of the corona ring for high-voltage devices described in the present invention, the shielding assembly includes a connecting ring mounted in a slot, a shielding ring is mounted on the outside of the connecting ring, and multiple groups of positioning holes are provided on the outside of the connecting ring corresponding to the connection with the slot.

[0010] As a preferred solution of a corona ring for a high-voltage device described in the present invention, the connecting frame is connected to a locking assembly that cooperates with the positioning hole, and the locking assembly includes a retaining spring button connected to the outside of the connecting frame, and a linkage retaining spring buckle movably connected to the slot.

[0011] As a preferred solution of the corona ring for high-voltage devices described in the present invention, there are multiple groups of linked retaining spring buckles, which are equidistantly connected in the slots in a ring shape, and the linked retaining spring buckles are arranged in one-to-one correspondence with the positioning holes.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The one-piece corona ring is transformed into a connecting frame and ring frame structure, which is fixed by a positioning bolt group. This ensures the stability of the corona ring connection on the high-voltage cable. In addition, by designing the ring frame into a three-level gradient field modulation structure, the dual mechanisms of material property changes and active deformation respond to environmental changes, with strong adaptive capabilities. 2. A shielding ring and a connecting ring structure are added to the original corona ring to form a double-ring coupled electric field, which makes the surface point distribution smoother. The double-ring coupled electric field produces a hyperbolic curvature effect, which can extend the discharge path. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort. Among them: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of some structures; Figure 3 For the present invention Figure 2 Schematic diagram of explosion structure; Figure 4 For the present invention Figure 1 Look at the structural diagram; Figure 5 For the present invention Figure 2 Schematic diagram of some structures.

[0014] In the figure: 100 connecting assembly, 110 connecting frame, 111 fixing plate, 112 positioning bolt group, 120 ring frame, 130 slot, 200 shielding assembly, 210 connecting ring, 211 positioning hole, 220 shielding ring, 300 locking assembly, 310 retaining spring button, 320 linkage retaining spring buckle. DETAILED DESCRIPTION

[0015] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0016] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0017] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing the embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0018] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0019] The present invention provides a corona ring for high-voltage devices, which transforms the integrally formed corona ring into a connecting frame and a ring frame structure, and fixes it through a positioning bolt group, thereby ensuring the connection stability of the corona ring on the high-voltage cable. In addition, by designing the ring frame into a three-level gradient field modulation structure, the dual mechanisms of material property change and active deformation respond to environmental changes, and have strong self-adaptation capabilities. At the same time, a shielding ring and a connecting ring structure are added to the original corona ring, and a double-ring coupled electric field is formed between the two, making the surface point distribution smoother. The double-ring coupled electric field produces a hyperbolic curvature effect, which can extend the discharge path. Please refer to Figure 1-5 , including a connecting assembly 100, a shielding assembly 200 and a locking assembly 300; Please continue reading Figure 1-5 The connecting assembly 100 is composed of two sets of connecting frames 110 and a ring frame 120. The connecting frames 110 are arranged in a semicircular shape. The two sets of connecting frames 110 cooperate to form a covering member, and both ends of the connecting frames 110 are integrally connected with a fixing plate 111. The ring frame 120 is clamped on the outside of the two sets of connecting frames 110. The two sets of connecting frames 110 are connected by a positioning bolt group 112, which is connected to the fixing plate 111 to lock the two sets of connecting frames 110 adjacent to each other. A card slot 130 is opened on the outside of the connecting frame 110 at the position corresponding to the shielding assembly 200; The ring frame 120 adopts a three-level gradient field modulation structure, which includes an inner conductive ring, a middle buffer layer, and an outer shielding layer from the inside out. The inner conductive ring is made of a microporous honeycomb aluminum-based composite material with a surface plasma oxidation treatment. The middle buffer layer is made of boron nitride nanotubes. The ring frame 120 adopts a double-helix Archimedean surface setting, and the edge adopts a ginkgo leaf vein fractal structure. The integrally formed corona ring is transformed into a connecting frame 110 and a ring frame 120 structure, and fixed by a positioning bolt group 112, thereby ensuring the connection stability of the corona ring on the high-voltage cable. In addition, by designing the ring frame 120 as a three-level gradient field modulation structure, the dual mechanism of material property change and active deformation responds to environmental changes, and has strong adaptive ability. Please continue reading Figure 1 、 Figure 2 、 Figure 3 and Figure 5 , the shielding assembly 200 is connected to the connecting frame 110 to prevent electromagnetic interference and ensure safe operation of the equipment; The shielding assembly 200 includes a connecting ring 210 that is mounted in the card slot 130. A shielding ring 220 is mounted on the outer side of the connecting ring 210. A plurality of positioning holes 211 are formed on the outer side of the connecting ring 210 corresponding to the connection with the card slot 130. A shielding ring 220 and a connecting ring 210 are added to the original corona ring to form a double-ring coupled electric field, which makes the surface point distribution smoother. The double-ring coupled electric field also produces a hyperbolic curvature effect, which can extend the discharge path. Please continue reading Figure 4-5 The locking assembly 300 that cooperates with the positioning hole 211 is connected to the connecting frame 110. The locking assembly 300 includes a spring button 310 connected to the outside of the connecting frame 110 and a linkage spring buckle 320 movably connected to the slot 130. The linkage spring buckle 320 moves synchronously with the spring button 310 (similar to the locking structure of an automatic umbrella). The linkage spring buckle 320 is provided with multiple groups, and the multiple groups of linkage spring buckles 320 are equidistantly connected to the slot 130 in an annular shape. The linkage spring buckles 320 are arranged in a one-to-one correspondence with the positioning holes 211. The position of the linkage spring buckles 320 is changed by the spring button 310 to cooperate with the positioning hole 211 to lock the connecting ring 210, further improving the connection stability of the connecting ring 210. Working Principle: When in use, the invention transforms the integrally formed corona ring into a connecting frame 110 and a ring frame 120 structure, which are fixed by a positioning bolt group 112, ensuring the connection stability of the corona ring on the high-voltage cable. In addition, by designing the ring frame 120 as a three-level gradient field modulation structure, the dual mechanisms of material property changes and active deformation respond to environmental changes, with strong adaptive capabilities. At the same time, a shielding ring 220 and a connecting ring 210 structure are added to the original corona ring to form a double-ring coupled electric field, which makes the surface point distribution smoother and produces a hyperbolic curvature effect, which can extend the discharge path.

[0020] Although the present invention has been described above with reference to embodiments, various modifications may be made thereto and equivalent components may be substituted without departing from the scope of the present invention. In particular, as long as there are no structural conflicts, the various features of the embodiments disclosed herein may be combined with each other in any manner, and the omission of an exhaustive description of such combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A corona ring for a high voltage device, characterized in that: include: A connecting assembly (100), the connecting assembly (100) is composed of two groups of connecting frames (110) and a ring frame (120), the connecting frames (110) are arranged in a semicircular shape, the two groups of connecting frames (110) cooperate to form a covering member, and both ends of the connecting frames (110) are integrally formed and connected with a fixing plate (111), and the ring frame (120) is clamped on the outside of the two groups of connecting frames (110); The ring frame (120) adopts a three-level gradient field modulation structure, and comprises, from the inside to the outside, an inner conductive ring, an intermediate buffer layer, and an outer shielding layer. The inner conductive ring adopts a microporous honeycomb aluminum-based composite material, and its surface is plasma oxidized. The intermediate buffer layer adopts boron nitride compound nanotubes. The ring frame (120) adopts a double-helix Archimedean surface setting, and its edge adopts a ginkgo leaf vein fractal structure.

2. A corona ring for a high voltage device according to claim 1, characterized in that: In order to prevent electromagnetic interference and ensure safe operation of the equipment, a shielding component (200) is connected to the outside of the connecting frame (110).

3. The corona ring for high voltage device according to claim 1, characterized in that: The two groups of connecting frames (110) are connected via a positioning bolt group (112), and the positioning bolt group (112) is connected to the fixing plate (111) to lock the two groups of connecting frames (110) adjacent to each other.

4. The corona ring for high voltage device according to claim 3, characterized in that: A card slot (130) is provided on the outer side of the connecting frame (110) at a position corresponding to the shielding component (200).

5. The corona ring for high voltage device according to claim 2, characterized in that: The shielding assembly (200) comprises a connecting ring (210) mounted in the card slot (130), a shielding ring (220) being sleeved on the outside of the connecting ring (210), and a plurality of positioning holes (211) being provided on the outside of the connecting ring (210) corresponding to the connection with the card slot (130).

6. A corona ring for a high voltage device according to claim 5, characterized in that: The connecting frame (110) is connected to a locking assembly (300) that cooperates with the positioning hole (211). The locking assembly (300) includes a spring button (310) connected to the outside of the connecting frame (110) and a linked spring buckle (320) movably connected to the slot (130).

7. A corona ring for a high voltage device according to claim 6, characterized in that: The linkage spring buckles (320) are provided in multiple groups, and the multiple groups of linkage spring buckles (320) are connected to the clamping groove (130) in an annular shape and at equal intervals. The linkage spring buckles (320) and the positioning holes (211) are provided in a one-to-one correspondence.

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