Particle capture structure for GIS connection surface and installation method thereof

Abstract

The present invention relates to the field of electric power supply technology, and discloses a particle capture structure for a GIS connection surface and its installation method. The structure comprises: a first conductor rod, a second conductor rod, a cylinder, and a shielding cover. The end surface of the second conductor rod is provided with a docking groove, into which the first conductor rod is inserted. The shielding cover is disposed around the periphery of the first and second conductor rods, and includes a first cover body, a first connecting portion, a second connecting portion, and a second cover body connected in sequence. A first low-strength space is formed between the first cover body and the first conductor rod. The first connecting portion is connected to the outer peripheral wall of the first conductor rod, the second connecting portion is connected to the outer peripheral wall of the second conductor rod, and a second low-strength space is formed between the second cover body and the second conductor rod. The cylinder is sleeved around the periphery of the first and second conductor rods and the shielding cover. The present invention can effectively control particles generated during product installation, improve the product's particle capture efficiency, and enhance the product's insulation reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power supply equipment, and in particular to a particle capture structure for a GIS connection surface and an installation method thereof. Background Art

[0002] Gas-insulated substations (GIS) are widely used in power systems due to their superior insulation performance and space utilization. However, during the manufacturing, transportation, installation, and operation of GIS equipment, metal particles are inevitably generated. These metal particles mainly originate from the docking of the cylinder, tightening bolts, and the surrounding environment. These metal particles are charged by the electric field and float under the radial electric field inside the GIS, while moving freely under the axial electric field. The presence of metal particles can cause distortion of the electric field, forming weak insulation areas and even causing insulation breakdown. In addition, when metal particles adhere axially to the surface of the insulating nozzle, they can easily cause flashover failures, seriously affecting the safety and reliability of GIS equipment. Therefore, metal particles have become one of the main factors restricting the safe operation of GIS equipment.

[0003] To address the hazards posed by metal particles, common approaches include preventing charged metal particles, increasing the trigger voltage for charged metal particles, inhibiting the migration of suspended metal particles into an insulating basin, and preventing metal particles from adhering to the basin surface. These approaches have led to the development of solutions such as coating electrodes to reduce charged metal particles, coating insulating basins to lower the trigger voltage, and employing particle traps or repelling electrodes to inhibit the movement of metal particles.

[0004] Among these, particle trapping structures are the preferred method due to their low cost, significant effectiveness, and ease of operation. However, existing technologies primarily focus on creating a low electric field zone within the GIS. As particles pass through this zone, the radial electric field is reduced, preventing the electric field from counteracting gravity, forcing them into the trapping structure and preventing them from reaching the surface of the insulating basin. However, in actual field installations, their ability to capture metal particles generated by the mating surfaces remains limited. Summary of the Invention

[0005] The purpose of the present invention is to design a particle capturing structure and an installation method thereof which can effectively control metal particles generated during the installation process.

[0006] To achieve the above-mentioned objectives, the present invention provides a particle capture structure for a GIS connection surface, comprising: a first conductor rod, a second conductor rod, a cylindrical body, and a shielding cover, all extending in a first direction; the second conductor rod having a docking groove formed on an end surface facing one end of the first conductor rod, the end of the first conductor rod being inserted into the docking groove; a conductive member protruding from a peripheral wall of the docking groove, the first conductor rod being electrically connected to the second conductor rod via the conductive member; the shielding cover surrounding the outer periphery of the first and second conductor rods, the shielding cover comprising a first cover body, a first connecting portion, a second connecting portion, and a second cover body connected in sequence along the first direction; a first low-strength space being formed between the first cover body and the outer peripheral wall of the first conductor rod; the first connecting portion being connected to the outer peripheral wall of the first conductor rod; the second connecting portion being connected to the outer peripheral wall of the second conductor rod; and a second low-strength space being formed between the second cover body and the outer peripheral wall of the second conductor rod; and the cylindrical body being sleeved over the outer peripheries of the first and second conductor rods and the shielding cover.

[0007] Furthermore, the first conductor rod includes a first conductor segment and a first docking segment arranged in sequence along a first direction, the diameter of the first docking segment is smaller than the diameter of the first conductor segment, the first docking segment is partially inserted into the docking groove, and the first cover body and a portion of the outer peripheral wall of the first docking segment are spaced apart to form the first low-strength space.

[0008] Furthermore, it also includes an elastic member and a positioning member. A first positioning groove is provided on the outer peripheral wall of the first docking section, and a second positioning groove is provided on the inner peripheral wall of the first connecting part. One end of the positioning member is inserted into the first positioning groove and connected to the first positioning groove through the elastic member, and the other end of the positioning member is inserted into the second positioning groove.

[0009] Furthermore, the second conductor rod includes a second docking segment, a connecting segment and a second conductor segment arranged in sequence along the first direction, the docking groove is arranged in the second docking segment, the diameter of the connecting segment is smaller than the diameters of the second conductor segment and the second docking segment, and the second low-strength space is formed between the second cover body and the outer peripheral wall of the connecting segment.

[0010] Furthermore, it also includes a guide ring, and a mounting groove is provided on the groove wall of the docking groove and / or the inner peripheral wall of the second connecting portion. The guide ring is arranged in the positioning groove and protrudes relative to the mounting groove.

[0011] Furthermore, both ends of the shielding cover along the first direction are bent inward.

[0012] Furthermore, it also includes a particle catcher and a connector, the particle catcher is arranged between the shielding cover and the cylinder and is connected to the cylinder through the connector, the particle catcher is respectively spaced apart from the outer peripheral wall of the shielding cover and the inner peripheral wall of the cylinder to form a third low-intensity space, and a plurality of capture holes are opened on the particle catcher.

[0013] Furthermore, the particle trap is arc-shaped and covers the shielding cover at an angle of R°, wherein 60°≤R°≤180°.

[0014] Furthermore, the cylinder includes a first sub-cylinder and a second sub-cylinder connected in sequence along a first direction, the particle trap is connected to the inner circumferential wall of the first sub-cylinder through the connecting piece, and the particle trap covers the connection between the first sub-cylinder and the second sub-cylinder.

[0015] The present invention also provides a method for installing a particle capture structure for a GIS connection surface, comprising the following steps:

[0016] S1: The shielding cover is placed on the first guide rod and moved close to the first positioning groove. The positioning member presses the elastic member to make the positioning member shrink and rebound and then insert it into the second positioning groove;

[0017] S2 inserts the first conductor rod into the docking groove of the second conductor rod through the guide ring, forming a passage through the conductive member;

[0018] S3: First, install the particle trap on the first sub-cylinder, and then connect the first sub-cylinder with the second sub-cylinder.

[0019] Compared with the prior art, the particle capture structure for GIS connection surface and the installation method thereof according to the embodiment of the present invention have the following advantages:

[0020] The particle capture structure and installation method for a GIS connection surface according to an embodiment of the present invention employs a shielding cover disposed at the periphery of the connection between a first conductor rod and a second conductor rod to form a low-intensity, spatially optimized electric field at the junction of the conductive rods. This prevents metal particles generated during the conductive rod junction from falling into the cylinder and captures metal particles that move onto the conductive rods, thereby improving the product's particle capture efficiency overall. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of a particle capture structure for a GIS connection surface according to an embodiment of the present invention;

[0022] Figure 2 yes Figure 1 A magnified schematic diagram of point A in the middle;

[0023] Figure 3 yes Figure 1 A magnified schematic diagram of point B in the middle;

[0024] Figure 4 It is a structural schematic diagram of a particle trap in a particle trap structure for a GIS connection surface according to an embodiment of the present invention.

[0025] In the figure, 1. first conductor rod; 11. first conductor segment; 12. first docking segment; 121. first positioning groove; 2. second conductor rod; 20. docking groove; 21. second docking segment; 22. connecting segment; 23. second conductor segment; 201. conductive member; 3. cylinder; 31. first sub-cylinder; 32. second sub-cylinder; 4. shielding cover; 41. first cover; 42. first connecting part; 421. second positioning groove; 43. second connecting part; 44. second cover; 51. first low-strength space; 52. second low-strength space; 53. third low-strength space; 6. elastic member; 7. positioning member; 81. mounting groove; 82. guide ring; 9. particle catcher; 91. connecting member; 92. capturing hole; x, first direction. DETAILED DESCRIPTION

[0026] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the present invention, it should be understood that the terms "connected," "connected," "fixed," etc. used in the present invention should be interpreted broadly. For example, the terms may be fixedly connected, detachably connected, or integrated; may be mechanically connected or welded; may be directly connected or indirectly connected through an intermediate medium; may be internal communication between two elements or an interactive relationship between two elements, unless otherwise clearly defined. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The present invention uses terms such as "first" and "second" to describe various types of information, but the information should not be limited to these terms. These terms are used only to distinguish information of the same type from each other. For example, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information without departing from the scope of the present invention.

[0030] Reference Figure 1 A particle capture structure for a GIS connection surface according to an embodiment of the present invention includes: a first conductor rod 1, a second conductor rod 2, a cylinder 3, and a shielding cover 4, all extending along a first direction x. The second conductor rod 2 has a docking groove 20 defined on its end surface facing one end of the first conductor rod 1. The end of the first conductor rod 1 is inserted into the docking groove 20. A conductive member 201 is protruding from a peripheral wall of the docking groove 20. The first conductor rod 1 is connected to the second conductor rod 2 via the conductive member 201 to achieve electrical connection. The shielding cover 4 is arranged around the outer periphery of the first conductor rod 1 and the second conductor rod 2. The shielding cover 4 includes a first cover body 41, a first connecting part 42, a second connecting part 43 and a second cover body 44 connected in sequence along the first direction x. A first low-strength space 51 is formed between the first cover body 41 and the outer peripheral wall of the first conductor rod 1. The first connecting part 42 is connected to the outer peripheral wall of the first conductor rod 1, the second connecting part 43 is connected to the outer peripheral wall of the second conductor rod 2, and a second low-strength space 52 is formed between the second cover body 44 and the outer peripheral wall of the second conductor rod 2; the cylinder 3 is sleeved on the outer periphery of the first conductor rod 1, the second conductor rod 2 and the shielding cover 4.

[0031] During the docking and installation process of the first conductor rod 1 and the second conductor rod 2, metal particles may be generated. The generated metal particles will drift under the action of the high-voltage electric field. The shielding cover 4 can form a low-intensity space between it and the conductor rod to create a particle capture trap, so that the metal particles are attracted by the low-intensity space and are effectively captured, thereby improving the insulation reliability of the product.

[0032] If the first conductive rod and the second conductive rod are directly connected without the shielding cover 4, the top corners of the first conductive rod and the second conductive rod 2 are small, or even have edges, which will cause the field strength in this area to concentrate, and the high field strength area will cause discharge; after adding the shielding cover 4, the outer surface of the shielding cover 4 has a rounded corner and a smooth transition, which can make the field strength evenly distributed, effectively optimize the electric field structure at this position, and reduce the risk of discharge.

[0033] Specifically, the shielding cover 4 may be made of aluminum; the first conductor rod 1 and the second conductor rod 2 are connected via the conductive member 201 to form a passage, constituting a main current loop.

[0034] In some improved solutions of the present application, the first conductor rod 1 includes a first conductor segment 11 and a first docking segment 12 sequentially arranged along a first direction x. The diameter of the first docking segment 12 is smaller than the diameter of the first conductor segment 11. The first docking segment 12 is partially inserted into the docking slot 20. The first cover 41 and the outer peripheral wall of a portion of the first docking segment 12 form the first low-strength space 51. The end of the first conductor rod 1 is reduced in diameter to form the first docking segment 12. This not only facilitates the insertion of the first conductor rod 1 into the docking slot 20, but also helps to form the first low-strength space 51 in response to the first cover 41. This allows the metal particles to move to this area under the action of the electric field and lose the electric field force, falling into the interior of the first cover 41.

[0035] Reference Figure 2 In some improved solutions of the present application, an elastic member 6 and a positioning member 7 are also included. A first positioning groove 121 is provided on the outer peripheral wall of the first docking section 12, and a second positioning groove 421 is provided on the inner peripheral wall of the first connecting portion 42. One end of the positioning member 7 is inserted into the first positioning groove 121 and connected to the first positioning groove 121 through the elastic member 6, and the other end of the positioning member 7 is inserted into the second positioning groove 421.

[0036] By providing the positioning member 7, a more reliable connection can be achieved between the first conductive rod 1 and the shielding cover 4, preventing the two from loosening or falling off. The design of the elastic member 6 facilitates the installation and removal of the positioning member 7, while ensuring the reliability of the connection. Specifically, the first guide rod can be provided with three or more first positioning slots 121 in the circumferential direction, and the first connecting portion 42 is provided with multiple second positioning slots 421 at multiple corresponding positions. During installation, the shielding cover 4 is slid along the end of the first conductive rod. After reaching the position of the first positioning slot 121, the elastic member 6 and positioning member 7 are pressed to retract the positioning member 7 into the first conductive rod 1. After the first connecting portion 42 passes through the second positioning slot 421 where the positioning member 7 rebounds and presses against the inner wall of the shielding cover 4, the shielding cover 4 is fixed to the outer circumference of the first conductive rod.

[0037] In some improved solutions of the present application, the second conductor rod 2 includes a second docking segment 21, a connecting segment 22, and a second conductor segment 23 arranged in sequence along the first direction x. The docking groove 20 is provided within the second docking segment 21. The diameter of the connecting segment 22 is smaller than the diameters of the second conductor segment 23 and the second docking segment 21. The second low-strength space 52 is formed between the second cover 44 and the outer peripheral wall of the connecting segment 22. Reducing the diameter of the connecting segment 22 of the second conductor rod 2 facilitates the formation of the second low-strength space 52 by the connecting segment 22 and the second cover 44. This allows metal particles to move to this region under the action of the electric field and lose the electric field force, falling into the interior of the second cover 44.

[0038] In some improved solutions of the present application, a guide ring 82 is further included. An installation groove 81 is provided on the groove wall of the docking groove 20 and / or the inner wall of the second connecting portion 43. The guide ring 82 is arranged in the positioning groove and protrudes relative to the installation groove 81.

[0039] By providing the guide ring 82, the end of the first conductor rod 1 can be more accurately guided to be inserted into the docking groove 20, and the second conductor rod 2 can be guided to be inserted into the second connecting portion 43 of the shielding cover 4, thereby improving the accuracy and efficiency of installation; at the same time, the direct friction between the end of the first conductor rod 1 and the groove wall of the docking groove 20, and between the end of the second conductor rod 2 and the second connecting portion 43 can be reduced, thereby reducing wear and extending the service life of the equipment; in addition, the guide ring 82 can also provide additional support, improve the stability of the connection, and prevent the connection from loosening.

[0040] In some improved solutions of the present application, the shielding cover 4 is bent inward at both ends along the first direction x. By bending the two ends of the shielding cover 4 inward, a more closed low-strength space can be formed, further enhancing the ability to capture particles and reducing the possibility of particle escape.

[0041] Reference Figure 4 Some improved solutions of the present application further include a particle trap 9 and a connector 91. The particle trap 9 is disposed between the shielding cover 4 and the cylinder 3 and connected to the cylinder 3 via the connector 91. The particle trap 9 is spaced from the outer circumferential wall of the shielding cover 4 and the inner circumferential wall of the cylinder 3 to form a third low-intensity space 53. The particle trap 9 is provided with a plurality of capture holes 92. By providing the particle trap 9, the third low-intensity space 53 is formed. Under the action of the electric field, drifting particles enter the capture holes 92 and are captured within the particle trap 9, thereby achieving multiple capture of particles and further improving the particle capture efficiency.

[0042] In a specific embodiment, six bolt holes are provided on the particle collector 9, six connecting members 91, i.e., bolts, are provided, and six mounting portions for mounting bolts are welded on the inner circumferential wall of the cylinder 3. The particle collector 9 is mounted on the inner circumferential wall of the cylinder 3 by bolts.

[0043] In some improved solutions of the present application, the particle trap 9 is arc-shaped and covers the shield 4 at an angle of R°, where 60°≤R°≤180°. Specifically, the particle trap 9 can be set to a 120° arc. Experimental observations show that 120° is sufficient to capture most jumping metal particles.

[0044] Reference Figure 3In some improved solutions of the present application, the cylinder 3 includes a first sub-cylinder 31 and a second sub-cylinder 32 connected in sequence along a first direction x. The particle trap 9 is connected to the inner circumferential wall of the first sub-cylinder 31 via the connecting member 91, and the particle trap 9 covers the connection between the first sub-cylinder 31 and the second sub-cylinder 32. The particle trap 9 covers the connection between the first sub-cylinder 31 and the second sub-cylinder 32. When the first sub-cylinder 31 and the second sub-cylinder 32 are docked, the particle trap 9 is first fixed to the first sub-cylinder 31, so that the metal particles generated during the docking process fall directly into the holes of the particle trap 9, thereby improving the overall efficiency of particle capture.

[0045] The present invention also provides a method for installing a particle capture structure for a GIS connection surface, comprising the following steps:

[0046] S1 puts the shielding cover 4 on the first guide rod and moves it in the opposite direction of the first direction x. After it approaches the first positioning groove 121, it presses the elastic member 6 through the positioning member 7 to shrink the positioning member 7. The shielding cover 4 is continued to be moved so that the positioning member 7 rebounds and is inserted into the second positioning groove 421 of the first connecting part 42, thereby realizing a reliable connection between the shielding cover 4 and the first wire rod 1.

[0047] S2 inserts the first conductor rod 1 into the docking groove 20 of the second conductor rod 2 through the guide ring 82. When the outer peripheral wall of the first conductor rod 1 contacts the conductive member 201 in the docking groove 20, an electrical path is formed between the first conductor rod 1 and the second conductor rod 2.

[0048] S3: First, the particle trap 9 is installed on the inner wall of the first sub-cylinder 31 through the connecting piece 91, and then the first sub-cylinder 31 is connected to the second sub-cylinder 32 to form a complete cylinder 3. At this time, the particle trap 9 covers the connection between the first sub-cylinder 31 and the second sub-cylinder 32.

[0049] In summary, embodiments of the present invention provide a particle capture structure for a GIS connection surface and its installation method. By adding a shielding cover 4 at the connection point between the first conductive rod and the second conductor rod 2, the structure optimizes the electric field at the conductive rod connection point. This structure prevents metal particles generated during the conductive rod connection process from falling into the interior of the cylinder 3 and captures metal particles that move onto the conductive rod, thereby improving the product's overall particle capture efficiency. By installing a particle catcher 9 on the inner surface of the first sub-cylinder 31 at the connection surface, particles generated during the connection process can fall into the catcher hole. Even if some metal particles land on the surface of the cylinder 3, they are more easily captured by the particle catcher 9 at that location. By adding a particle capture structure to the GIS connection surface, the present invention effectively controls particles generated during product installation, improves the product's particle capture efficiency, and enhances the product's insulation reliability.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A particle capture structure for a GIS connection surface, characterized in that: include: A first conductor rod, a second conductor rod, a cylinder and a shielding cover, all extending in a first direction, the second conductor rod having an end surface facing one end of the first conductor rod having a docking groove, the end of the first conductor rod being inserted into the docking groove, a conductive member protruding from a groove peripheral wall of the docking groove, the first conductor rod being electrically connected to the second conductor rod via the conductive member; the shielding cover surrounding the outer periphery of the first conductor rod and the second conductor rod, the shielding cover comprising a first cover body, a first connecting portion, a second connecting portion and a second cover body connected in sequence along the first direction, a first low-strength space being formed between the first cover body and the outer periphery of the first conductor rod, the first connecting portion being connected to the outer periphery of the first conductor rod, the second connecting portion being connected to the outer periphery of the second conductor rod, and a second low-strength space being formed between the second cover body and the outer periphery of the second conductor rod; the cylinder being sleeved over the outer periphery of the first conductor rod, the second conductor rod and the shielding cover; The first conductor rod includes a first conductor segment and a first docking segment sequentially arranged along a first direction, wherein the diameter of the first docking segment is smaller than that of the first conductor segment, and the first docking segment is partially inserted into the docking groove, and the first low-strength space is formed between the first cover and a portion of the outer peripheral wall of the first docking segment; The second conductor rod includes a second docking segment, a connecting segment and a second conductor segment arranged in sequence along the first direction, the docking groove is arranged in the second docking segment, the diameter of the connecting segment is smaller than the diameters of the second conductor segment and the second docking segment, and the second low-strength space is formed between the second cover body and the outer peripheral wall of the connecting segment.

2. The particle capture structure for GIS connection surface according to claim 1, characterized in that: It also includes an elastic member and a positioning member. A first positioning groove is provided on the outer peripheral wall of the first docking section, and a second positioning groove is provided on the inner peripheral wall of the first connecting part. One end of the positioning member is inserted into the first positioning groove and connected to the first positioning groove through the elastic member, and the other end of the positioning member is inserted into the second positioning groove.

3. The particle capture structure for GIS connection surface according to claim 1, characterized in that: It also includes a guide ring. A mounting groove is provided on the groove wall of the docking groove and / or the inner peripheral wall of the second connecting portion. The guide ring is arranged in the docking groove and protrudes relative to the mounting groove.

4. The particle capture structure for GIS connection surface according to claim 1, characterized in that: Both ends of the shielding cover along the first direction are bent inward.

5. The particle capture structure for GIS connection surface according to claim 1, characterized in that: It also includes a particle catcher and a connector. The particle catcher is arranged between the shielding cover and the cylinder and is connected to the cylinder through the connector. The particle catcher is spaced apart from the outer wall of the shielding cover and the inner wall of the cylinder to form a third low-intensity space. A plurality of capture holes are provided on the particle catcher.

6. The particle capture structure for GIS connection surface according to claim 5, characterized in that: The particle trap is arc-shaped and covers the shielding cover at an angle of R°, wherein 60°≤R°≤180°.

7. The particle capture structure for GIS connection surface according to claim 5, characterized in that: The cylinder includes a first sub-cylinder and a second sub-cylinder connected in sequence along a first direction. The particle trap is connected to the inner peripheral wall of the first sub-cylinder through the connecting member, and the particle trap covers the connection between the first sub-cylinder and the second sub-cylinder.

8. A method for installing a particle capture structure for a GIS connection surface, for use with the particle capture structure according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: The shielding cover is placed on the first conductor rod and moved close to the first positioning groove. The positioning member presses the elastic member to cause the positioning member to shrink and rebound before being inserted into the second positioning groove. S2 inserts the first conductor rod into the docking groove of the second conductor rod through the guide ring, forming a passage through the conductive member; S3: First, install the particle trap on the first sub-cylinder, and then connect the first sub-cylinder with the second sub-cylinder.

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