Particle capturing structure for GIS (Gas Insulated Switchgear) connecting surface and mounting method thereof

Abstract

The invention relates to the technical field of electric power supply, and discloses a particle capturing structure for a GIS connecting face and an installation method thereof.The particle capturing structure comprises a first wire rod, a second wire rod, a barrel and a shielding cover, a butt joint groove is formed in the end face of the second wire rod, and the first wire rod is inserted into the butt joint groove; the shielding cover surrounds the peripheries of the first wire rod and the second wire rod, the shielding cover comprises a first cover body, a first connecting part, a second connecting part and a second cover body which are connected in sequence, a first low-strength space is formed between the first cover body and the first wire rod in a spaced mode, and the first connecting part is connected with the peripheral wall of the first wire rod; the second connecting part is connected with the peripheral wall of the second wire rod, and a second low-strength space is formed between the second cover body and the second wire rod at an interval; the cylinder sleeves the peripheries of the first wire rod, the second wire rod and the shielding cover. Particles generated in the product installation process can be effectively controlled, the particle capturing efficiency of the product is improved, and the insulation reliability of the product is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power supply equipment, and in particular to a particle capturing 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, metal particles are inevitably generated during the manufacturing, transportation, installation and operation of GIS equipment. These metal particles mainly come from the docking of the cylinder, the tightening bolts and the surrounding environment. These metal particles are charged under the action of the electric field, float under the action of the radial electric field inside the GIS, and move freely under the action of the axial electric field. The presence of metal particles will cause the distortion of the electric field, form weak insulation areas, and may even cause insulation breakdown. In addition, when metal particles adhere to the surface of the insulating sprayer along the axial direction, it is very easy to cause flashover failures, which seriously affect 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] In order to solve the harm caused by metal particles, the common ideas are: prevent metal particles from being charged, increase the starting voltage of charged metal particles, inhibit the movement of suspended metal particles to the insulating basin, and prevent metal particles from adhering to the surface of the basin. Based on these ideas, relevant solutions have emerged, such as coating the surface of the electrode to reduce the charge of metal particles, coating the surface of the insulating basin to reduce the starting voltage, and setting particle traps or driving electrodes to inhibit the movement of metal particles.

[0004] Among them, setting up a particle trap structure is the preferred method because of its low cost, significant effect, and simple operation. However, the existing technology mainly focuses on forming a low electric field area inside the GIS, so that when the particles pass through this area, the electric field force cannot offset the gravity due to the reduction of the radial electric field, so that the particles enter the capture structure, achieving the purpose of preventing the particles from reaching the surface of the insulating basin. However, in actual on-site installation, the ability to capture metal particles generated by the docking surface is still 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] In order to achieve the above-mentioned object, the present invention provides a particle capture structure for a GIS connection surface, comprising: a first conductor rod, a second conductor rod, a cylinder and a shielding cover, all extending along a first direction, the second conductor rod is provided with a docking groove on an end surface facing one end of the first conductor rod, the end of the first conductor rod is inserted into the docking groove, a conductive member is convexly provided on a groove peripheral wall of the docking groove, and the first conductor rod is electrically connected to the second conductor rod through the conductive member; the shielding cover is arranged around the periphery of the first conductor rod and the second conductor rod, the shielding cover comprises 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 is formed between the first cover body and the peripheral wall of the first conductor rod, the first connecting portion is connected to the peripheral wall of the first conductor rod, the second connecting portion is connected to the peripheral wall of the second conductor rod, and a second low-strength space is formed between the second cover body and the peripheral wall of the second conductor rod; the cylinder is sleeved on the periphery of the first conductor rod, the second conductor rod 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 opened on the outer peripheral wall of the first docking section, a second positioning groove is opened 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 arranged on the groove wall of the docking groove and / or the inner peripheral wall of the second connecting part, and the guide ring is arranged in the positioning groove and protrudes relative to the mounting groove.

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

[0012] Furthermore, it also includes a particle trap and a connector, wherein the particle trap is disposed between the shielding cover and the cylinder and connected to the cylinder via the connector, and the particle trap is spaced apart from the outer circumferential wall of the shielding cover and the inner circumferential wall of the cylinder respectively to form a third low-intensity space, and a plurality of capture holes are provided on the particle trap.

[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 sleeved on the first guide rod and moved to approach the first positioning groove, and the positioning member presses the elastic member to make the positioning member shrink and rebound and then insert 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, and forms a passage through the conductive member;

[0018] S3 first installs the particle trap on the first sub-cylinder, and then connects 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 beneficial effects:

[0020] The particle capture structure for the GIS connection surface and the installation method thereof of the embodiment of the present invention form a low-intensity space to optimize the electric field at the connection point of the conductive rods by setting a shielding cover on the periphery of the connection point between the first conductive rod and the second conductive rod, thereby preventing metal particles generated during the connection of the conductive rods from falling into the cylinder body and capturing metal particles moving onto the conductive rods, thereby improving the particle capture efficiency of the product as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural 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 The enlarged schematic diagram of point A in the middle;

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

[0024] Figure 4 It is a schematic structural 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, capture hole; x, first direction. DETAILED DESCRIPTION

[0026] The specific implementation of the present invention is further described in detail below in conjunction with 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 operated 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" and the like used in the present invention should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a welding connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

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

[0030] Reference Figure 1 A particle capture structure for a GIS connection surface according to an embodiment of the present invention comprises: 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 having an end surface facing one end of the first conductor rod 1 provided with a docking groove 20, the end of the first conductor rod 1 being inserted into the docking groove 20, a conductive member 201 being convexly provided on a groove peripheral wall of the docking groove 20, the first conductor rod 1 being 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, and the shielding cover 4 includes a first cover body 41, a first connecting portion 42, a second connecting portion 43 and a second cover body 44 which are connected in sequence along a 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 portion 42 is connected to the outer peripheral wall of the first conductor rod 1, the second connecting portion 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 under the action of 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, since the top corners of the first conductive rod and the second conductive rod 2 are small and even have edges, the field strength in this area will be concentrated, and the high field strength area will cause discharge; after adding the shielding cover 4, since the outer surface of the shielding cover 4 has a rounded corner and a smooth transition, the field strength can be evenly distributed, effectively optimizing the electric field structure at this position and reducing 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 schemes 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 groove 20, and the first cover body 41 and the outer peripheral wall of part of the first docking segment 12 are spaced to 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, which, on the one hand, facilitates the insertion of the first conductor rod 1 into the docking groove 20, and, on the other hand, helps to form the first low-strength space 51 in response to the first cover body 41, so that the metal particles move to this area under the action of the electric field and lose the action of the electric field force, and fall into the first cover body 41.

[0035] Reference Figure 2 In some improved schemes 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 between the first conductor rod 1 and the shielding cover 4 can be achieved to prevent 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 grooves 121 in the circumferential direction, and the first connecting portion 42 is provided with multiple second positioning grooves 421 at multiple corresponding positions. During installation, the shielding cover 4 is slid in along the end of the first conductive rod, and after reaching the position of the first positioning groove 121, the elastic member 6 and the positioning member 7 are pressed to retract the positioning member 7 into the first conductor rod 1, and the first connecting portion 42 passes through the second positioning groove 421 where the positioning member 7 rebounds against the inner wall of the shielding cover 4, so that the shielding cover 4 is fixed to the outer periphery of the first conductive rod.

[0037] In some improved solutions of the present application, the second conductor rod 2 includes a second docking section 21, a connecting section 22 and a second conductor section 23 arranged in sequence along the first direction x, the docking groove 20 is arranged in the second docking section 21, the diameter of the connecting section 22 is smaller than the diameters of the second conductor section 23 and the second docking section 21, and the second low-strength space 52 is formed between the second cover body 44 and the outer peripheral wall of the connecting section 22. The connection section 22 of the second conductor rod 2 is reduced in diameter, which helps the connection section 22 and the second cover body 44 to form the second low-strength space 52 in response to each other, so that the metal particles lose the electric field force after being moved to this area by the electric field and fall into the second cover body 44.

[0038] In some improved schemes of the present application, a guide ring 82 is further included. An installation groove 81 is arranged 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 two ends of the shielding cover 4 along the first direction x are bent inwards. By bending the two ends of the shielding cover 4 inwards, 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 In some improved schemes of the present application, a particle catcher 9 and a connector 91 are further included. The particle catcher 9 is disposed between the shielding cover 4 and the cylinder 3 and is connected to the cylinder 3 through the connector 91. The particle catcher 9 is spaced apart from the outer peripheral wall of the shielding cover 4 and the inner peripheral wall of the cylinder 3 to form a third low-intensity space 53. A plurality of capture holes 92 are provided on the particle catcher 9. By providing the particle catcher 9, a third low-intensity space 53 can be formed. Under the action of the electric field, drifting particles will enter the capture holes 92 and be captured in the particle catcher 9, thereby realizing 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, six mounting portions for mounting bolts are welded on the inner circumferential wall of the cylinder 3, and 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 shielding cover 4 at an angle of R°, where 60°≤R°≤180°. Specifically, the particle trap 9 can be set to an arc of 120°. It can be seen from experimental observations that 120° can capture most of the 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 catcher 9 is connected to the inner peripheral wall of the first sub-cylinder 31 through the connecting member 91, and the particle catcher 9 covers the connection between the first sub-cylinder 31 and the second sub-cylinder 32. The particle catcher 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 catcher 9 is first fixed on the first sub-cylinder 31, so that the metal particles generated during the docking process directly fall into the hole of the particle catcher 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 sets 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, the positioning member 7 presses the elastic member 6 to shrink the positioning member 7, and continues to move the shielding cover 4 to make the positioning member 7 rebound and insert 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 conductor 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 installs the particle trap 9 on the inner wall of the first sub-cylinder 31 through the connecting piece 91, and then connects the first sub-cylinder 31 with 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, the embodiment of the present invention provides a particle capture structure for a GIS connection surface and an installation method thereof, which optimizes the electric field at the connection point of the conductive rods by adding a shielding cover 4 at the connection position of the first conductive rod and the second conductive rod 2, and can prevent the metal particles generated during the conductive rod connection process from falling into the cylinder 3, and can also capture the metal particles moving onto the conductive rods, thereby improving the particle capture efficiency of the product as a whole; by installing a particle catcher 9 on the inner surface of the first sub-cylinder 31 of the connection surface, the particles generated during the connection process can fall into the catcher hole, and even if some metal particles fall on the surface of the cylinder 3, they are more easily captured by the particle catcher 9 at this position. By adding a particle capture structure to the GIS connection surface, the present invention effectively controls the particles generated during the product installation process, improves the particle capture efficiency of the product, and enhances the insulation reliability of the product.

[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 is provided with a docking groove on an end surface facing one end of the first conductor rod, the end of the first conductor rod is inserted into the docking groove, a conductive member is convexly provided on the groove peripheral wall of the docking groove, and the first conductor rod is electrically connected to the second conductor rod through the conductive member; the shielding cover is arranged around the periphery of the first conductor rod and the second conductor rod, the shielding cover comprises a first cover body, a first connecting part, a second connecting part and a second cover body connected in sequence along the first direction, a first low-strength space is formed between the first cover body and the peripheral wall of the first conductor rod, the first connecting part is connected to the peripheral wall of the first conductor rod, the second connecting part is connected to the peripheral wall of the second conductor rod, and a second low-strength space is formed between the second cover body and the peripheral wall of the second conductor rod; the cylinder is sleeved on the periphery of the first conductor rod, the second conductor rod and the shielding cover.

2. The particle capture structure for GIS connection surface according to claim 1, characterized in that: 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.

3. The particle capture structure for GIS connection surface according to claim 2, characterized in that: It also includes an elastic member and a positioning member. A first positioning groove is opened on the outer circumferential wall of the first docking section, and a second positioning groove is opened on the inner circumferential 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.

4. The particle capture structure for GIS connection surface according to claim 1, characterized in that: The second conductor rod includes a second docking section, a connecting section and a second conductor section arranged in sequence along the first direction, the docking groove is arranged in the second docking section, the diameter of the connecting section is smaller than the diameters of the second conductor section and the second docking section, and the second low-strength space is formed between the second cover body and the outer peripheral wall of the connecting section.

5. 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 arranged 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.

6. 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 inwards.

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

8. The particle capture structure for GIS connection surface according to claim 7, characterized in that: The particle trap is arc-shaped and covers the shielding cover at an angle of R°, wherein 60°≤R°≤180°.

9. The particle capture structure for GIS connection surface according to claim 7, 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 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.

10. A method for installing a particle capture structure for a GIS connection surface, characterized in that: The following steps are involved: S1: The shielding cover is sleeved on the first guide rod and moved to approach the first positioning groove, and the positioning member presses the elastic member to make the positioning member shrink and rebound and then insert into the second positioning groove; S2 inserts the first conductor rod into the docking groove of the second conductor rod through the guide ring, and forms a passage through the conductive member; S3 first installs the particle trap on the first sub-cylinder, and then connects the first sub-cylinder with the second sub-cylinder.

Images