Assembly type particle catcher for GIS / GIL and barrel structure for GIL

Abstract

The invention provides an assembly type particle catcher for GIS / GIL and a barrel structure for GIS / GIL, the particle catcher is installed in a GIS / GIL pipeline, and the GIS / GIL pipeline comprises a GIS / GIL barrel and a conductor located in the GIS / GIL barrel; comprising a particle trapper body and a flange arranged at one end of the particle trapper body. The particle catcher main body is of a cylinder structure, the conductor is located in the cylinder structure, and a particle catching gap is formed between the cylinder structure and the GIS / GIL cylinder; a plurality of catching holes are formed in the cylinder wall of the cylinder structure; the flange is located at the end of the cylinder structure, is of a circular ring structure and is coaxial with the cylinder structure, and the particle trapper body is detachably installed on the inner side of the end of the GIS / GIL cylinder through the flange structure. Compared with a welding structure of the particle catcher and the GIS / GIL barrel, the welding structure has the advantages that the machining procedures can be greatly reduced, the painting difficulty is reduced, the assembly efficiency is improved, and the storage and maintenance cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of high voltage switch technology and relates to a prefabricated particulate trap for GIS / GIL and a cylindrical structure for GIL. Background Technology

[0002] Gas-insulated metal-enclosed transmission lines (GILs) are widely used in high-voltage AC transmission projects due to their high operational stability and reliability. To prevent insulation accidents caused by conductive metal particles generated inside the GIL during production, assembly, and transmission, particle traps are installed on both sides of the low-voltage cylindrical section of the basin-type insulator inside the AC GIL to protect the insulating components. Furthermore, the cylindrical section is usually painted to reduce and suppress charged particles. For example, patent application CN110883016A discloses a GIL with an internal particle trap design. Under DC voltage, particles are affected by a single electric field force, causing them to move more violently and potentially onto high-voltage conductors or insulators, significantly reducing the insulation level of the equipment. Therefore, the design of DC GIS equipment must consider the suppression of charged particles.

[0003] Currently, in DC GIS busbars, the particulate trap and the cylinder are welded together, which has the following technical defects:

[0004] This makes the manufacturing process of the catcher and the cylinder more complex;

[0005] Because of the welding process, the trap and the cylinder can only be painted after welding. However, after the trap and the cylinder are welded, the paint is easily uneven because the trap has a grid structure and there is a gap between the outer circle of the trap and the inner wall of the cylinder (to form a low electric field area to capture particles). The paint is also easy to drip from the grid holes of the trap onto the cylinder wall, which is not easy to remove. This introduces new non-metallic particles, making it difficult to implement and control the painting process inside the cylinder.

[0006] When storing the welded trap and cylinder, special protection is required to prevent foreign objects from entering the gaps of the trap. Furthermore, before production begins, it is difficult to remove foreign objects from the cylinder and trap, which can easily lead to foreign object residue and high production and storage costs.

[0007] Therefore, how to provide a prefabricated particulate trap for GIS / GIL with low processing difficulty and high production efficiency, as well as a cylindrical structure for GIL, is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0008] In view of this, the present invention proposes a prefabricated particulate trap for GIS / GIL and a cylindrical structure for GIS / GIL. Compared with the welded structure of particulate trap and GIS / GIL cylinder, it can significantly reduce processing steps, reduce painting difficulty, improve assembly efficiency, and reduce storage and maintenance costs. It can be widely used in AC GIL or DC GIS switchgear.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] This invention discloses a prefabricated particulate trap for GIS / GIL pipelines, installed inside a GIS / GIL pipeline. The GIS / GIL pipeline includes a GIS / GIL cylinder and a conductor located inside the GIS / GIL cylinder. The device includes a particulate trap body and a flange disposed at one end of the particulate trap body.

[0011] The main body of the particle trap is a cylindrical structure, the conductor is located inside the cylindrical structure, and a particle trapping gap is formed between the cylindrical structure and the GIS / GIL cylinder; multiple trapping holes are provided on the cylinder wall of the cylindrical structure;

[0012] The flange is located at the end of the cylindrical structure, has a circular structure and is coaxial with the cylindrical structure. The particulate trap body is detachably installed on the inner side of the end of the GIS / GIL cylinder through the flange structure.

[0013] Preferably, the particulate trap body is coaxial with the GIS / GIL cylinder.

[0014] Preferably, the flange has a plurality of mounting holes radially formed on its circumferential surface, which are used to mate with a plurality of mounting holes formed on the GIS / GIL cylinder, and the particle trap body and the GIS / GIL cylinder can be detachably installed by inserting a fastener into the mounting holes.

[0015] Preferably, the mounting holes on the circumferential surface of the flange along the radial direction of the flange are screw mounting holes, and the mounting holes on the GIS / GIL cylinder are threaded holes along the radial direction of the GIS / GIL cylinder. The particulate trap body and the GIS / GIL cylinder can be detachably installed by inserting screws into the screw mounting holes and the threaded holes in sequence.

[0016] Preferably, the screw mounting hole is a countersunk screw mounting hole, and after the particulate trap body is fixed to the GIS / GIL cylinder, the screw surface does not extend beyond the surface of the countersunk screw mounting hole on one side of the inner wall of the annular structure of the flange.

[0017] Preferably, the end of the GIS / GIL cylinder is used to install a basin-type insulator.

[0018] Preferably, the particulate trap body has a flanged structure at the end away from the flange, and the flanged direction is towards the inner wall of the GIS / GIL cylinder.

[0019] Preferably, the outer diameter of the flange structure is smaller than the outer diameter of the flange.

[0020] Preferably, except for the surface of the flange that is in contact with the GIS / GIL cylinder, the remaining surfaces of the flange and the main body of the particulate trap are coated with an insulating varnish layer.

[0021] The present invention also provides a cylindrical structure for GIS / GIL, wherein the end of the cylindrical structure has a mounting part for detachably installing the assembled particulate trap for GIS / GIL; the particulate trap body is detachably installed to the inner side of the end of the GIS / GIL cylindrical structure through the flange structure.

[0022] Preferably, the GIS / GIL cylinder has a plurality of mounting holes along the radial direction for engaging with a plurality of mounting holes along the radial direction on the circumferential surface of the flange, thereby enabling the detachable installation of the particulate trap body and the GIS / GIL cylinder by inserting a fastener into the mounting holes.

[0023] As can be seen from the above technical solution, compared with the prior art, the beneficial effects of the present invention include:

[0024] This invention changes the particulate trap and GIS / GIL cylinder from a welded structure to an assembled structure. Traditional particulate traps are connected to the cylinder by welding, which leads to complex manufacturing processes, difficulties in painting, and the potential introduction of new non-metallic particles. The assembled structure proposed in this invention connects the trap to the cylinder using flanges and screws, simplifying the production process and improving assembly efficiency.

[0025] Because this invention employs an assembly-type design, the cylinder and the particle trap can be painted separately. This avoids the problem of uneven painting after welding, especially at the grid holes of the trap. It also reduces the possibility of introducing new foreign matter during the painting process.

[0026] Compared to cylinders with welded particulate traps, the GIS / GIL cylinder with its assembled particulate trap eliminates the need for special foreign object protection measures during storage, thus reducing storage and maintenance costs. Furthermore, removing foreign objects from the cylinder and trap before production is significantly easier, reducing the risk of foreign object residue.

[0027] The coaxial fit between the particle trap and the GIS / GIL cylinder of this invention results in a machined structure, which makes the dimensional fit more precise and ensures good assembly quality.

[0028] The flanged structure at one end of the particle trap of the present invention not only improves the electric field, but also prevents particles in the gap between the trap and the inner wall of the GIS / GIL cylinder from escaping along the GIS / GIL cylinder wall to the outside of the flanged structure, thereby improving the trapping efficiency. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 An axial sectional view of a prefabricated particulate trap for GIS / GIL provided in an embodiment of the present invention;

[0031] Figure 2 A three-dimensional structural diagram of a prefabricated particulate trap for GIS / GIL provided in an embodiment of the present invention;

[0032] Figure 3 This is a partial structural cross-sectional view of a prefabricated particle trap for GIS / GIL provided in an embodiment of the present invention;

[0033] Figure 4 The assembly structure diagram of the prefabricated particulate trap and the cylindrical structure for GIS / GIL provided in the embodiments of the present invention is shown. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] This invention provides a prefabricated particulate trap for GIS / GIL, installed inside a GIS / GIL pipeline. The GIS / GIL pipeline includes a GIS / GIL cylinder 3 and a conductor 41 located inside the GIS / GIL cylinder 3; as shown... Figure 1 As shown, it includes a particulate trap body 1 and a flange disposed at one end of the particulate trap body 1; wherein,

[0036] The main body 1 of the particulate trap is a cylindrical structure, and the conductor 41 is located inside the cylindrical structure. A particulate trapping gap is formed between the cylindrical structure and the GIS / GIL cylinder 3. Multiple trapping holes 12 are provided on the cylindrical wall of the cylindrical structure.

[0037] The flange is located at the end of the cylindrical structure, and is a ring structure coaxial with the cylindrical structure. The ring structure of the flange is extended outward along the axial direction on the circumferential end face of the cylindrical structure. The particulate trap body 1 is detachably installed on the inner side of the end of the GIS / GIL cylinder 3 through the flange structure.

[0038] In practice, the flange and cylindrical structure are prefabricated components formed by welding.

[0039] To fully illustrate the specific embodiments of the present invention, the working principle of the particulate trap is explained below:

[0040] Along the axial direction of the GIS / GIL cylinder 3, the GIS / GIL cylinder 3 has a conductive section on the side of the particle trap that is not a conductive wall surface. There is a gap between the particle trap and the inner wall of the GIS / GIL cylinder 3, which forms a shielded area with a low electric field strength for collecting metal particles.

[0041] Because the inner wall of the GIS / GIL cylinder 3 near the particulate trap is a conductive section, conductor 41 is at high voltage and the GIS / GIL cylinder 3 is at low voltage, an electric field force is generated on the metal particles inside the GIS / GIL cylinder 3. Under the action of the electric field force, the metal particles will jump up and down. The electric field lines near the basin insulator 5 are twisted, and the electric field generates an axial component, which in turn generates an axial electric field force on the metal particles, allowing the metal particles to jump in the horizontal direction. Thus, the metal particles inside the GIS / GIL cylinder 3 can move in both horizontal and vertical directions, and finally jump into the particulate trap. They enter the shielded area through the grid structure formed by the trapping holes 12 on the particulate trap. The area between the particulate trap and the inner wall of the GIS / GIL cylinder 3 is a shielded area with a low electric field strength. At this time, the electric field force on the metal particles is insufficient to make the metal particles jump again until the metal particles are no longer charged and will no longer jump. The capture of the particles is achieved, and the harmless treatment of the metal particles in the GIS / GIL device is completed.

[0042] This embodiment, through the detachable installation structure of the particulate trap and the GIS / GIL cylinder 3, can significantly reduce the new metal particles generated during welding and the non-metallic particles that enter during storage, thus helping to further ensure the operational stability and reliability of the GIS / GIL device.

[0043] In one embodiment, the particulate trap body 1 is coaxial with the GIS / GIL cylinder 3.

[0044] In one embodiment, such as Figure 2 As shown, the trapping hole 12 is an elongated hole extending along the circumference. Multiple rows of elongated holes form a grid structure. The central angle θ corresponding to the arc length covered by the grid structure in the circumferential direction is not less than 90°. The length, spacing, and arrangement of the grid holes are not limited in this embodiment. Setting the trapping hole 12 as an elongated hole allows the conductive particles to pass through as much space as possible, facilitating their entry into the particle trap. During installation, the grid structure should be arranged at the bottom of the GIS / GIL cylinder 3, symmetrically distributed along the upper and lower center lines of the cylinder.

[0045] It is understandable that the bottom direction of the GIS / GIL cylinder 3 is the bottom direction when the GIS / GIL device is in use, so that the metal particles can fall into the capture range of the grid structure under the action of gravity.

[0046] In one embodiment, a plurality of mounting holes are provided radially on the circumferential surface of the flange for engaging with a plurality of mounting holes provided on the GIS / GIL cylinder 3. The particle trap body 1 and the GIS / GIL cylinder 3 can be detachably installed by inserting a fastener into the mounting hole.

[0047] In this embodiment, as Figure 2 As shown, the number of mounting holes should be at least 4, evenly distributed along the circumference of the particulate trap flange.

[0048] In this embodiment, the mounting holes on the circumferential surface of the flange along the radial direction of the flange are screw mounting holes 211, and the mounting holes on the GIS / GIL cylinder 3 are threaded holes 311 on the inner circular surface 310 of the GIS / GIL cylinder along the radial direction of the GIS / GIL cylinder 3. The particle trap body 1 and the GIS / GIL cylinder 3 can be detachably installed by inserting screws 6 into the screw mounting holes 211 and the threaded holes 311 in sequence.

[0049] It should be noted that "radial" refers to the axial direction of the screw 6 mounting hole 211 and the threaded hole 311 being collinear with the radial direction of the cylindrical structure.

[0050] In this embodiment, the mounting hole 211 for screw 6 is a countersunk screw mounting hole 211. After the particle trap body 1 is fixed to the GIS / GIL cylinder 3, the surface of screw 6 does not extend beyond the surface of the countersunk screw mounting hole 211 on one side of the inner wall of the flange's annular structure, that is, it does not extend beyond the surface of the flange's inner circular surface 220. In this embodiment, hexagonal screws 6 are used, and the countersunk screw mounting hole 211 ensures that screw 6 does not protrude after installation, thus preventing distortion of the electric field.

[0051] In one embodiment, the size of the capture gap can be achieved by simply changing the dimensions of the particle trap flange and the thin-walled cylinder of the trap, such as... Figure 2 neutralization Figure 3The flanges of the two particulate traps have different radial thicknesses in their annular structure, resulting in different trapping gaps after installation.

[0052] In one embodiment, the particulate trap located at the end of the GIS / GIL cylinder 3 is also used to install a basin-type insulator 5, such as... Figure 4 As shown.

[0053] In one embodiment, a flange structure 11 is provided at the end of the particulate trap body 1 away from the flange, with the flange facing the inner wall of the GIS / GIL cylinder 3. The flange structure 11 can prevent particles in the gap between the particulate trap and the inner wall of the GIS / GIL cylinder 3 from escaping along the cylinder wall to the outside of the flange structure 11.

[0054] In one embodiment, the outer diameter of the flange structure 11 is smaller than the outer diameter of the flange surface 210, which facilitates the insertion of the catcher into the cylinder.

[0055] In one embodiment, except for the surface of the flange that is in contact with the GIS / GIL cylinder 3, the other surfaces of the flange and the surface of the particulate trap body 1 are coated with an insulating varnish layer. The insulating varnish layer can be epoxy resin insulating varnish, which greatly reduces the jumping height and moving speed of the metal particles jumping onto the particulate trap.

[0056] The interior of the GIS / GIL cylinder 3 and the particulate filter can be painted separately. However, the flange of the particulate filter and the fastening surfaces of the GIS / GIL cylinder 3 are not painted to ensure reliable electrical contact. No special foreign object protection measures are required for storing the cylinder that mates with the filter. The cylinder and filter can be easily cleaned and foreign objects removed before installation.

[0057] The present invention also provides a cylindrical structure for GIS / GIL, wherein the end of the cylindrical structure has a mounting part for detachably installing a prefabricated particulate trap for GIS / GIL; the particulate trap body 1 is detachably installed on the inner side of the end of the GIS / GIL cylindrical body 3 through a flange structure.

[0058] like Figure 4 As shown, the GIS / GIL cylinder 3 is provided with a basin-type insulator 5 for supporting the high-voltage center conductor 41. An electrical connection contact seat 42 is connected to the center of the basin-type insulator 5. The electrical connection contact seat 42 has an insertion structure for inserting the high-voltage center conductor 41.

[0059] In one embodiment, the GIS / GIL cylinder 3 has a plurality of mounting holes along the radial direction, which are used to cooperate with a plurality of mounting holes along the radial direction on the flange circumference. The particle trap body 1 and the GIS / GIL cylinder 3 can be detachably installed by inserting a fastener into the mounting hole.

[0060] The above provides a detailed description of the prefabricated particulate trap for GIS / GIL and the cylindrical structure for GIL provided by the present invention. Specific examples are used in this embodiment to illustrate the principle and implementation of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

[0061] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined in these embodiments may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An assembled micro-particle trap for GIS / GIL, characterized by, The particle trap is installed in a GIS / GIL pipe, which comprises a GIS / GIL cylinder and a conductor in the GIS / GIL cylinder; the particle trap comprises a particle trap body and a flange arranged at one end of the particle trap body; wherein, the particle trap body is a cylindrical structure, the conductor is arranged inside the cylindrical structure, and a particle trapping gap is formed between the cylindrical structure and the GIS / GIL cylinder; a plurality of trapping holes are arranged on the cylinder wall of the cylindrical structure; the flange is arranged at the end of the cylindrical structure, has a ring structure and is coaxial with the cylindrical structure, and the particle trap body is detachably installed on the inside of the end of the GIS / GIL cylinder through the flange structure.

2. The assembled micro-particle trap for GIS / GIL according to claim 1, wherein a plurality of installation holes are arranged on the circumference of the flange along the radial direction of the flange, are matched with a plurality of installation holes arranged on the GIS / GIL cylinder, and are used for realizing the detachable installation of the particle trap body and the GIS / GIL cylinder by inserting a fixing member into the installation holes.

3. The modular particle arrestor of claim 2, wherein, the installation holes arranged on the circumference of the flange along the radial direction of the flange are screw installation holes, a plurality of installation holes arranged on the GIS / GIL cylinder are threaded holes arranged along the radial direction of the GIS / GIL cylinder, and the detachable installation of the particle trap body and the GIS / GIL cylinder is realized by sequentially inserting screws into the screw installation holes and the threaded holes.

4. The modular particle arrestor of claim 3, wherein, the screw installation holes are countersunk screw installation holes, and after the particle trap body and the GIS / GIL cylinder are fixed, the surface of the screw does not exceed the surface of the countersunk screw installation hole on one side of the inner wall of the ring structure of the flange.

5. The modular particle arrestor of claim 1, wherein, the end of the GIS / GIL cylinder is used for installing a basin-type insulator.

6. The modular particle arrestor of claim 1, wherein, an edge-turning structure is arranged at the end of the particle trap body away from the flange, and the edge-turning structure is directed towards the inner wall of the GIS / GIL cylinder.

7. The modular particle arrestor of claim 6, wherein the porous material is a ceramic. the outer circle size of the edge-turning structure is smaller than the outer circle size of the flange.

8. The modular particle arrestor of claim 1, wherein, in addition to the surface of the flange in contact with the GIS / GIL cylinder, the remaining surfaces of the flange and the surfaces of the particle trap body are coated with an insulating paint layer.

9. A cylinder structure for GIS / GIL, characterized by, the end of the cylinder structure has an installation portion for detachably installing the particle trap of any one of claims 1-8, and the particle trap body is detachably installed on the inside of the end of the GIS / GIL cylinder structure through the flange structure.

10. The cylinder structure for GIS / GIL according to claim 9, wherein a plurality of installation holes are arranged on the GIS / GIL cylinder along the radial direction, are matched with a plurality of installation holes arranged on the circumference of the flange along the radial direction of the flange, and are used for realizing the detachable installation of the particle trap body and the GIS / GIL cylinder by inserting a fixing member into the installation holes.

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