Particulate removal device and method for a particulate trap device

Abstract

The application discloses a particle taking-out device and method of a particle trapping device, relates to the technical field of particle trapping, and comprises a static socket and a dynamic contact, the dynamic contact is connected with the static socket through plug-pull connection, a collecting piece for trapping particles is arranged between the dynamic contact and the static socket, a containing shell one and a containing shell two are arranged, the open end of the containing shell one and the open end of the containing shell two are detachably connected, one side of the static socket is fixedly connected with the open end inner wall of the containing shell one away from itself, and the wiring end of the dynamic contact is fixedly connected with the open end inner wall of the containing shell two away from itself.In the application, according to the mutual cooperation of the above-mentioned components, the main gas chamber of the equipment and the particle collecting cavity can be effectively isolated during operation and maintenance, the backflow and diffusion of particles are avoided throughout the process, the insulation failure risk of the equipment caused by metal particles is eliminated from the source, and the long-term safe and stable operation of the gas insulated switchgear is ensured.

Description

Technical Field

[0001] This invention relates to the field of particulate capture technology, specifically to a particulate capture trap device and method for removing particulate particles. Background Technology

[0002] Gas-insulated switchgear (GIS) is widely used in high-voltage, ultra-high-voltage, and extra-high-voltage power grid transmission and distribution systems due to its superior insulation performance, small footprint, and high operational stability. It is the core switch control and power distribution equipment in power plants. The core functional units of this equipment, such as circuit breakers, disconnectors, grounding switches, and gas-insulated busbars, all adopt a fully enclosed metal tank structure. The tank is filled with insulating gases such as high-purity sulfur hexafluoride to achieve insulation isolation between the live conductors and the external environment, ensuring the long-term safe and stable operation of the power grid equipment.

[0003] Among them, circuit breakers, disconnectors and grounding switches rely on the opening and closing of moving and stationary contacts to realize the conduction and disconnection of power grid lines and grounding protection, thereby matching different operating, maintenance and fault conditions of the power station. The conductors and contacts of the gas-insulated busbar adopt a plug-in connection structure to realize the efficient transmission of electrical energy. During the long-term operation of the equipment, the moving and stationary contacts of various operating units frequently open and close, and the busbar conductors and contacts are affected by load changes and ambient temperature fluctuations, resulting in thermal expansion and contraction relative displacement. The mating surfaces of each plug-in contact continuously rub or scrape, inevitably generating a large number of tiny metal particles. These metal particles are small in size and light in weight, and are dispersed in the closed insulating gas chamber, unable to settle naturally and quickly.

[0004] Metal particles are one of the core hidden dangers causing insulation failures in gas-insulated switchgear. Under the strong electric field environment of normal energized operation, metal particles in the gas chamber will become polarized or charged. Under the combined effects of electric field force, equipment operation vibration and airflow disturbance of insulating gas, they will continue to float or move randomly. The particles are very easy to adhere to the high potential areas and surface gaps of insulating components such as insulators or insulating bushings. This will not only destroy the uniformity of the electric field on the surface of the insulating components, causing abnormal phenomena such as partial discharge or surface discharge, but also cause electrolytic corrosion or aging and cracking of the insulating components in the long term, which will greatly reduce the insulation strength of the equipment. In severe cases, it will induce flashover or breakdown or even short circuit and explosion of the equipment, which will directly threaten the safety and stability of the overall operation of the power grid.

[0005] To address the insulation hazards posed by metal particles, the industry has developed targeted particle trapping technology. The mainstream solution involves reserving a pull-out structure below the moving and stationary contacts of the switching equipment's operating unit to construct a simple particle trap. Utilizing the principle of gravity settling, the metal particles that detach during the opening and closing operations are collected in a concentrated manner, thereby reducing the large-scale dispersion of particles inside the gas chamber and mitigating the risk of particles randomly attaching to insulating components to a certain extent.

[0006] However, existing particle trap structures only have a simple particle collection function. The metal particles captured inside the trap are not completely removed and remain inside the closed air chamber of the equipment. Mechanical vibration or airflow fluctuations caused by load switching during equipment operation, as well as the continuous effect of the power frequency electric field, will disturb the particles deposited in the trap again, causing the particles to be lifted or dispersed again and re-adsorbed onto the surface of insulating parts or high-potential conductors. This will still cause severe operational abnormalities such as partial discharge or insulation damage. It is impossible to eliminate the equipment reliability risk caused by metal particles from the root. Therefore, this invention provides a particle removal device and method for a particle trap device. Summary of the Invention

[0007] The purpose of this invention is to provide a particle extraction device and method for a particle trapping device to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a particle removal device and method for a particle trapping device, comprising a static socket and a dynamic contact, wherein the dynamic contact and the static socket are connected by a plug-in connection, and a particle trapping component is provided between the dynamic contact and the static socket for particle trapping.

[0009] The assembly includes;

[0010] The housing consists of two housings, housing 1 and housing 2. The open ends of housing 1 and housing 2 are detachably connected. One side of the static socket is fixedly connected to the inner wall of housing 1 away from its own open end. The wiring terminal of the dynamic contact is fixedly connected to the inner wall of housing 2 away from its own open end. A flow tube for providing a flow channel for particles is detachably installed between housing 1 and housing 2. A container is fixedly installed on the inner wall of the flow tube. The inner cavity of the container contains an adsorbent for collecting particles. A sinking tube is connected to the end of the flow tube away from housing 1 via a flange. A collection box for collecting particles is connected to the end of the sinking tube away from the flow tube via a flange.

[0011] Both housing 1 and housing 2 have arc-shaped grooves at their bottoms that communicate with their own internal cavities. Arc-shaped plates are fixedly installed in the internal cavities of both arc-shaped grooves. One end of the flow tube is connected to the two arc-shaped plates by screws. The flow tube, after being fixed by screws, is located directly below the connection between the dynamic contact and the static socket.

[0012] The flow tube is designed as a frustum shape, and the larger end of the flow tube is connected to two arc-shaped plates.

[0013] A ball valve is rotatably installed in the inner cavity of the sinking pipe. A sealing shell is rotatably installed on the outer wall of the ball valve. The outer wall of the sealing shell is fixedly connected to the inner wall of the sinking pipe, and the inner wall of the sealing shell and the outer wall of the ball valve fit together. A valve stem is rotatably installed on the outer wall of the sinking pipe. One end of the valve stem extends into the inner cavity of the sinking pipe and is fixedly connected to the outer wall of the ball valve.

[0014] A guide tube is fixedly installed in the inner cavity of the submerged pipe. The inner cavity of the guide tube is designed as a frustum-shaped structure, and the guide tube is located between the ball valve and the flow pipe. The open end of the inner cavity of the guide tube is flush with the end of the submerged pipe.

[0015] A discharge pipe that communicates with its own inner cavity is fixedly installed on one side of the collection box. A sealing ring is fixedly installed in the inner cavity of the discharge pipe, and a sealing plate for sealing the end of the sealing ring is slidably installed in the inner cavity of the discharge pipe. A compression spring is fixedly installed at the end of the sealing plate away from the sealing ring, and the other end of the compression spring is fixedly connected to the inner wall of the discharge pipe. The sealing ring is located between the sealing plate and the inner cavity of the collection box.

[0016] The end of the discharge pipe away from the inner cavity of the collection box is fitted with a sealing cap for sealing its own inner cavity via a threaded connection.

[0017] Multiple plug-in blocks are fixedly installed on the top and both sides of the housing 2, and stabilizing blocks are fixedly installed on the top and both sides of the housing 1. Each of the multiple stabilizing blocks has a groove that matches the plug-in block on one side near the opening of the housing 1. Each of the multiple grooves has a compression spring fixedly installed on both sides of the inner cavity.

[0018] The extrusion spring is made of metal, and the two sides of the multiple plug blocks are provided with limiting grooves that are compatible with the extrusion spring.

[0019] A method for removing particles from a particle trapping device includes the following steps:

[0020] S1. The equipment is shut down and ready for operation. Confirm that the gas-insulated switchgear is in a power-off and safe maintenance state to ensure safe operation. By rotating the external valve stem, the ball valve is rotated and closed, completely sealing the sinking pipe channel and isolating the upper contact working chamber from the lower collection box chamber. This prevents the leakage of insulating gas from the upper chamber or the entry of impurities into the main equipment gas chamber during subsequent vacuuming and particle removal. Remove the sealing cap at the end of the discharge pipe and seal the docking joint of the special vacuum pumping equipment with the discharge pipe port. After docking, start the vacuum equipment. The vacuum negative pressure will overcome the elasticity of the compression spring and pull the sealing plate to slide outward, disengaging from the sealing ring and making the inner cavity of the collection box connected to the vacuum equipment.

[0021] S2. Perform vacuuming operation. Use vacuum equipment to perform negative pressure vacuuming on the internal cavity of the collection box, slowly extracting the residual insulating gas and suspended fine particles inside the collection box to create a vacuum environment. This step can thoroughly remove the residual light particles and stray gas inside the box, preventing particles from drifting into the main gas chamber of the equipment when disassembling the collection box. At the same time, it ensures the air pressure balance in the cavity and meets the airtight operation and maintenance standards of the equipment. The vacuuming process is carried out at a uniform and slow speed to avoid damage to the internal structure due to excessive negative pressure. After vacuuming is completed, maintain vacuum pressure stabilization for 1-2 minutes to ensure that particles and gas are completely extracted and purified. After the particles are collected and removed, and the vacuum equipment is turned off after vacuuming and stabilization, slowly disassemble the vacuum docking joint, squeeze the spring to reset, and push the sealing plate to press the sealing ring again to automatically seal the discharge pipe. Then, disassemble the connection structure between the sink pipe and the collection box through the flange, remove the collection box, and uniformly clean, collect and harmlessly treat the metal particles stored in the box.

[0022] S3. After the particulate matter cleaning is completed, reconnect the collection box to the submerged pipe via the flange, tighten the sealing cap to complete the double seal, and after confirming that the overall structure is airtight, rotate the valve stem in the opposite direction to open the ball valve channel. The device will then return to normal particulate matter collection operation and can be put back into operation.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. By setting up a container loaded with modified porous nano-alumina adsorbent inside the flow tube, the excellent insulating adsorption properties of the adsorbent are utilized to physically solidify and adsorb micron-sized light metal particles suspended in the gas chamber and easily dispersed by airflow and vibration disturbances. This solves the problems of incomplete capture of fine particles by traditional traps and the easy re-attachment of particles to insulating parts under the action of electric field and airflow, which can cause partial discharge and insulation damage. In addition, the device is equipped with a controllable ball valve isolation structure and a multi-seal structure, which can effectively isolate the main gas chamber of the equipment from the particle collection chamber during operation and maintenance, and prevent the backflow and diffusion of particles throughout the process. This eliminates the risk of equipment insulation failure caused by metal particles from the root, and ensures the long-term safe and stable operation of gas-insulated switchgear.

[0025] 2. A dedicated channel for centralized particle collection and vacuum cleaning is constructed through a bottom-integrated collection box and a discharge pipe with a self-sealing structure. During normal operation, the compression spring and sealing plate, together with the sealing ring and sealing cap, form a double sealing structure, strictly ensuring the airtightness and insulation performance of the equipment's sealed chamber without affecting the normal operation of the equipment. During regular maintenance and cleaning, the main cavity can be isolated by closing the ball valve through the valve stem, and the discharge pipe can be used to connect to the dust collection equipment and vacuum equipment to complete the collection of particles inside the collection box and vacuum purification. This can eliminate secondary pollution of particles during disassembly and significantly reduce equipment maintenance costs and power outage repair time, meeting the practical application requirements of high reliability and easy maintenance for high-voltage power grid equipment. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0027] Figure 2 This is an assembly diagram of the first and second accommodating housings of the present invention;

[0028] Figure 3 This is an assembly diagram of the collection box and flow tube of the present invention;

[0029] Figure 4 This is an assembly diagram of the flow pipe and the submerged pipe of the present invention;

[0030] Figure 5 This is an assembly diagram of the ball valve and guide tube of the present invention;

[0031] Figure 6 This is an assembly diagram of the collection box and sealing plate of the present invention;

[0032] Figure 7 This is an assembly diagram of the stabilizing block and the plug-in block of the present invention.

[0033] In the diagram: 1. Housing 1; 2. Housing 2; 3. Flow pipe; 4. Limiting groove; 5. Submerged pipe; 6. Valve stem; 7. Discharge pipe; 8. Collection box; 9. Compression spring; 10. Insertion block; 11. Dynamic contact; 12. Arc plate; 13. Housing; 14. Ball valve; 15. Sealing housing; 16. Sealing plate; 17. Sealing ring; 18. Compression spring; 19. Sealing cap; 20. Stabilizing block; 21. Guide pipe. 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] Example 1

[0036] Please see Figure 1-7This embodiment provides a particle removal device and method for a particle trapping device, including a static socket and a dynamic contact 11. The dynamic contact 11 and the static socket are connected by a plug-in connection. A particle trapping component is provided between the dynamic contact 11 and the static socket. The open end of the housing 1 and the open end of the housing 2 are detachably connected to form a semi-enclosed upper protective structure of the particle collection cavity, which can block metal particles scattered during equipment operation and prevent particles from spreading to insulating parts or high-potential areas. One side of the static socket is fixedly connected to the inner wall of the housing 1 away from its own open end, realizing the fixed limit of the housing 1. The wiring terminal of the dynamic contact 11 is fixedly connected to the inner wall of the housing 2 away from its own open end, so that the two housings can adapt to each other with the small plugging and unplugging action of the dynamic contact 11 without interfering with the normal opening and closing operation of the switching equipment.

[0037] Furthermore, such as Figure 1-4 As shown, both the first housing 1 and the second housing 2 have arc-shaped grooves at their bottoms that communicate with their own inner cavities. Arc-shaped plates 12 are fixedly installed in the inner cavities of both arc-shaped grooves. When the open ends of the first housing 1 and the second housing 2 are fitted together, the ends of the two arc-shaped plates 12 are fitted together, thereby forming a complete ring, providing an installation position for the subsequent installation of the flow tube 3. The flow tube 3 is detachably connected between the two arc-shaped plates 12 by screws. After assembly, the flow tube 3 is precisely located directly below the connection between the dynamic contact 11 and the static socket, ensuring that most of the metal particles generated by friction can fall directly into the interior of the flow tube 3 under the action of gravity, thereby improving the particle collection coverage.

[0038] Furthermore, the flow tube 3 is designed as a frustum-shaped structure, and the larger end of the flow tube 3 is connected to the arc plate 12. The upward-facing structure of the larger end can expand the particle receiving area and maximize the reception of falling metal particles. The downward-facing smaller end can form a beam effect, accelerate the downward settling of particles, and prevent particles from being stuck on the wall of the flow tube 3. The inner wall of the flow tube 3 is fixedly installed with a container 13, which is a hollow fixed box body used to stably load the adsorbent.

[0039] Furthermore, the adsorbent loaded in the inner cavity of the container 13 is made of modified porous nano alumina adsorbent particles. This material has excellent insulation performance, high porosity and strong adsorption stability, and is fully compatible with the closed environment of sulfur hexafluoride insulating gas. It will not produce conductive impurities or corrode the metal components of the equipment, and will not affect the insulation performance of the equipment. It is suitable for the special operating conditions of high-voltage electrical equipment.

[0040] Specifically, this adsorbent utilizes its porous adsorption structure to physically adsorb and capture suspended or drifting micron-sized metal particles stirred up by equipment vibration or airflow disturbances. This overcomes the limitations of gravity settling in collecting lightweight particles and prevents them from being re-drifted onto the surface of insulating components by airflow. Simultaneously, it buffers and intercepts falling metal particles, reducing their descent speed and preventing them from rebounding and drifting away after high-speed impacts with the pipe wall. Furthermore, it can solidify the captured particles over a long period, preventing them from detaching during normal equipment operation and significantly improving particle collection stability. Moreover, this adsorbent is resistant to high temperatures and electric field polarization, ensuring it will not fail or deteriorate under the strong electric field and temperature fluctuations of long-term energized equipment operation, allowing for long-term stable operation.

[0041] Specifically, such as Figure 2-4 As shown, the end of the flow tube 3 away from the housing 1 is detachably connected to the sinking tube 5 via a flange. The flange connection structure ensures the sealing of the assembly and facilitates disassembly and maintenance later. The sinking tube 5 is a particle transition channel that receives the particles falling from the flow tube 3 and guides the particles to finally fall into the bottom collection box 8.

[0042] Furthermore, such as Figure 5 As shown, a ball valve 14 is rotatably installed inside the cavity of the submerged pipe 5. The ball valve 14 is the core component for controlling the opening and closing of the channel, which can realize the complete opening and closing of the internal channel of the submerged pipe 5. A sealing shell 15 is fitted on the outer wall of the ball valve 14. The outer wall of the sealing shell 15 is fixedly connected to the inner wall of the submerged pipe 5, and the inner wall of the sealing shell 15 is tightly fitted to the outer wall of the ball valve 14, which can realize the complete sealing of the rotating position of the ball valve 14, and prevent gas leakage or particle leakage. A valve stem 6 is rotatably installed on the outer wall of the submerged pipe 5. One end of the valve stem 6 extends into the inner cavity and is fixedly connected to the ball valve 14. The operator can rotate the ball valve 14 by externally rotating the valve stem 6, which can control the opening and closing of the channel without disassembling the equipment, making the operation convenient.

[0043] Furthermore, a frustum-shaped guide tube 21 is fixedly installed inside the cavity of the sinking pipe 5. The guide tube 21 is located between the ball valve 14 and the flow pipe 3, and its open end is flush with the end of the sinking pipe 5. This structure can guide and gather the falling metal particles in a secondary manner, prevent the particles from adhering to the upper pipe wall of the ball valve 14, ensure the smooth fall of the particles, and at the same time buffer the impact of airflow disturbance on the lower particles, thereby improving the particle collection efficiency.

[0044] Among them, such as Figure 5-6 As shown, the end of the sinking pipe 5 away from the flow pipe 3 is connected to the collection box 8 through a flange. The collection box 8 is the final storage cavity for metal particles, used to centrally collect all the captured and guided metal particles, realizing the centralized storage of particles and providing a storage carrier for subsequent centralized removal and vacuum purification.

[0045] Furthermore, such as Figure 5As shown, the collection box 8 is fixedly connected to the discharge pipe 7 on one side, serving as a dedicated channel for subsequent vacuuming and particle removal. A sealing ring 17 is fixedly installed in the inner cavity of the discharge pipe 7, and a sealing plate 16 is slidably assembled thereon. A compression spring 18 is fixedly connected to one end of the sealing plate 16 away from the sealing ring 17, and the other end of the compression spring 18 is fixed to the inner wall of the discharge pipe 7. The sealing ring 17 is located between the sealing plate 16 and the inner cavity of the collection box 8. Under normal operating conditions, the compression spring 18 pushes the sealing plate 16 to press the sealing ring 17, thereby achieving automatic sealing of the discharge pipe 7, ensuring the airtightness of the entire device cavity, preventing external air from entering and internal insulating gas from leaking, and preventing the stored particles from leaking and scattering.

[0046] Furthermore, a sealing cap 19 is installed at the outer end of the discharge pipe 7 via a threaded connection. During normal operation, the sealing cap 19 is tightened to seal the outer port of the discharge pipe 7, forming a double sealing structure, which further improves the sealing performance of the sealed cavity and meets the airtight requirements of high-voltage insulation equipment.

[0047] Among them, such as Figure 1 and Figure 7 As shown, multiple plug-in blocks 10 are fixedly installed on the top and sides of the housing 2, and corresponding stabilizing blocks 20 are fixedly installed on the top and sides of the housing 1. Each stabilizing block 20 has a groove adapted to the plug-in block 10 on one side near the opening end of the housing. Metal extrusion springs 9 are fixedly installed on both sides of the groove, and limiting grooves 4 adapted to the extrusion springs 9 are opened on both sides of the plug-in block 10.

[0048] Furthermore, during the docking assembly of housing 1 and housing 2, the plug-in block 10 is embedded in the groove of the stabilizing block 20, and the metal extrusion spring 9 is squeezed into the limiting groove 4 of the plug-in block 10, thereby achieving quick locking and fixing of housing 1 and housing 2. The metal extrusion spring 9 has a stable elastic clamping force, which can prevent the housing from loosening or misaligning due to equipment operation vibration, ensuring the stability of the overall structure. At the same time, the plug-in elastic locking structure is easy to disassemble and assemble without complicated tools, making it convenient for equipment operation and maintenance.

[0049] During normal operation, the ball valve 14 is in the normally open state. The metal particles generated by the friction between the moving and stationary contacts are partially deposited into the collection box 8 by gravity through the arc plate 12, the flow pipe 3, and the guide pipe 21. The other part of the light suspended particles are adsorbed and retained by the modified porous nano alumina adsorbent inside the flow pipe 3, preventing the particles from being dispersed again. After long-term operation, the particles are concentrated and stored inside the collection box 8, and maintenance personnel can periodically remove the particles.

[0050] A method for removing particles from a particle trapping device includes the following steps:

[0051] S1. The equipment is shut down and ready for operation. Confirm that the gas-insulated switchgear is in a power-off and safe maintenance state to ensure safe operation. By rotating the external valve stem, the ball valve is rotated and closed, completely sealing the sinking pipe channel and isolating the upper contact working chamber from the lower collection box chamber. This prevents leakage of insulating gas from the upper chamber or impurities from entering the main equipment's gas chamber during subsequent vacuuming and particle removal. Remove the sealing cap at the end of the discharge pipe and seal the connection between the docking joint of the dedicated vacuum pumping equipment and the discharge pipe port. After docking, start the vacuum equipment. The vacuum negative pressure will overcome the spring force of the compression spring, pulling the sealing plate to slide outward and disengage from the sealing ring, making the inner cavity of the collection box connected to the vacuum equipment.

[0052] S2. Perform vacuuming. Use vacuum equipment to create a negative pressure vacuum inside the collection box, slowly removing residual insulating gas and suspended fine particles to form a vacuum environment. This step thoroughly removes residual light particles and stray gases, preventing particles from drifting into the main gas chamber of the equipment during disassembly. It also ensures pressure balance within the chamber, meeting the equipment's airtight operation and maintenance standards. The vacuuming process is performed slowly and evenly to avoid excessive negative pressure damaging the internal structure. After vacuuming, maintain the vacuum pressure for 1-2 minutes to ensure complete removal and purification of particles and gases. After the particles are collected and removed, and the vacuum pressure is stabilized, turn off the vacuum equipment, slowly disassemble the vacuum connector, squeeze the spring to reset, and push the sealing plate to tighten the sealing ring again, automatically sealing the discharge pipe. Then, disassemble the connection between the sink pipe and the collection box through the flange, remove the collection box, and uniformly clean, collect, and harmlessly treat the metal particles stored inside.

[0053] S3. After the particulate matter cleaning is completed, reconnect the collection box to the submerged pipe via the flange, tighten the sealing cap to complete the double seal, and after confirming that the overall structure is airtight, rotate the valve stem in the opposite direction to open the ball valve channel. The device will then return to normal particulate matter collection operation and can be put back into operation.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A particle removal device for a particle trapping device, comprising a static socket and a dynamic contact (11), wherein the dynamic contact (11) is plugged into the static socket, characterized in that: A particle trapping element is provided between the dynamic contact (11) and the static socket; The layup component includes; The housing consists of a first housing (1) and a second housing (2). The open ends of the first housing (1) and the second housing (2) are detachably connected. One side of the static socket is fixedly connected to the inner wall of the first housing (1) away from its own open end. The terminal of the dynamic contact (11) is fixedly connected to the inner wall of the second housing (2) away from its own open end. A flow tube (3) for providing a flow channel for particles is detachably installed between the first housing (1) and the second housing (2). A container (13) is fixedly installed on the inner wall of the flow tube (3). An adsorbent for collecting particles is loaded in the inner cavity of the container (13). A sinking tube (5) is connected to the end of the flow tube (3) away from the first housing (1) through a flange. A collection box (8) for collecting particles is connected to the end of the sinking tube (5) away from the flow tube (3) through a flange.

2. The particle removal device of the particle trapping device according to claim 1, characterized in that: Both the first accommodating housing (1) and the second accommodating housing (2) have arc-shaped grooves at their bottoms that communicate with their own inner cavities. Arc-shaped plates (12) are fixedly installed in the inner cavities of both arc-shaped grooves. One end of the flow tube (3) is connected to the two arc-shaped plates (12) by screws. The flow tube (3) fixed by screws is located directly below the connection between the dynamic contact (11) and the static socket.

3. The particle removal device of the particle trapping device according to claim 2, characterized in that: The flow tube (3) is configured as a frustum-shaped structure, and the large end of the flow tube (3) is connected to two arc-shaped plates (12).

4. The particle removal device of the particle trapping device according to claim 1, characterized in that: A ball valve (14) is rotatably installed in the inner cavity of the sinking pipe (5). A sealing shell (15) is rotatably installed on the outer wall of the ball valve (14). The outer wall of the sealing shell (15) is fixedly connected to the inner wall of the sinking pipe (5), and the inner wall of the sealing shell (15) and the outer wall of the ball valve (14) are in close contact with each other. A valve stem (6) is rotatably installed on the outer wall of the sinking pipe (5). The valve stem (6) extends to one end of the inner cavity of the sinking pipe (5) and is fixedly connected to the outer wall of the ball valve (14).

5. The particle removal device of the particle trapping device according to claim 4, characterized in that: A guide tube (21) is fixedly installed in the inner cavity of the sinking pipe (5). The inner cavity of the guide tube (21) is set as a frustum-shaped structure, and the guide tube (21) is located between the ball valve (14) and the flow pipe (3). The open end of the inner cavity of the guide tube (21) is flush with the end of the sinking pipe (5).

6. The particle removal device of the particle trapping device according to claim 1, characterized in that: A discharge pipe (7) communicating with its own inner cavity is fixedly installed on one side of the collection box (8). A sealing ring (17) is fixedly installed in the inner cavity of the discharge pipe (7), and a sealing plate (16) for sealing the end of the sealing ring (17) is slidably installed in the inner cavity of the discharge pipe (7). A compression spring (18) is fixedly installed at the end of the sealing plate (16) away from the sealing ring (17). The other end of the compression spring (18) is fixedly connected to the inner wall of the discharge pipe (7). The sealing ring (17) is located between the sealing plate (16) and the inner cavity of the collection box (8).

7. The particle removal device of the particle trapping device according to claim 6, characterized in that: The end of the discharge pipe (7) away from the inner cavity of the collection box (8) is fitted with a sealing cap (19) for sealing its own inner cavity by means of threaded connection.

8. The particle removal device of the particle trapping device according to claim 1, characterized in that: Multiple plug-in blocks (10) are fixedly installed on the top and both sides of the second accommodating housing (2). Stabilizing blocks (20) are fixedly installed on the top and both sides of the first accommodating housing (1). Each of the multiple stabilizing blocks (20) has a groove adapted to the plug-in block (10) on the side near the opening end of the first accommodating housing (1). Each of the multiple grooves has a compression spring (9) fixedly installed on both sides of the inner cavity.

9. The particle removal device of the particle trapping device according to claim 8, characterized in that: The extrusion spring (9) is made of metal material, and the two sides of the plurality of plug blocks (10) are provided with limiting grooves (4) that are adapted to the extrusion spring (9).

10. A method for removing particles from a particle trapping device, comprising a particle removal device according to claims 1 to 9, characterized in that, Includes the following steps: S1. The equipment is shut down and ready for operation. Confirm that the gas-insulated switchgear is in a power-off and safe maintenance state to ensure safe operation and maintenance. By rotating the external valve stem (6), the ball valve (14) is rotated and closed, so that the ball valve (14) completely blocks the channel of the sinking pipe (5) and completely isolates the upper contact working chamber from the lower collection box (8) chamber. This prevents the upper chamber insulation gas from leaking out or impurities from entering the main equipment gas chamber during the subsequent vacuuming and particle removal process. Remove the sealing cap (19) at the end of the discharge pipe (7) and seal the docking joint of the special vacuum pumping equipment with the port of the discharge pipe (7). After docking, start the vacuum equipment. The vacuum negative pressure will overcome the elasticity of the compression spring (18) and pull the sealing plate (16) to slide outward and disengage from the sealing ring (17), so that the inner cavity of the collection box (8) is connected to the vacuum equipment. S2. Perform vacuuming operation. Use vacuum equipment to perform negative pressure vacuuming on the internal cavity of the collection box (8), slowly extracting the residual insulating gas and suspended fine particles inside the collection box (8) to create a vacuum environment inside the collection box (8). This step can thoroughly remove the residual light particles and stray gas inside the box, preventing particles from drifting into the main gas chamber of the equipment when disassembling the collection box (8), while ensuring the air pressure balance of the cavity and meeting the airtight operation and maintenance standards of the equipment. The vacuuming process is carried out slowly and evenly to avoid excessive negative pressure damaging the internal structure. After completion, maintain vacuum and pressure for 1-2 minutes to ensure that the particles and gas are completely extracted and purified. After the particles are collected and removed, and after vacuuming and pressure stabilization, turn off the vacuum equipment, slowly disassemble the vacuum docking joint, squeeze the spring (18) to reset, push the sealing plate (16) to press the sealing ring (17) again, and automatically seal the discharge pipe (7). Then, disassemble the connection structure between the sinking pipe (5) and the collection box (8) through the flange, remove the collection box (8), and uniformly clean and collect the metal particles stored in the box and treat them harmlessly. S3. After the particulate cleaning is completed, the collection box (8) is resealed and connected to the sinking pipe (5) through the flange. The sealing cap (19) is tightened to complete the double seal. After confirming that the overall structure is airtight, the valve stem (6) is rotated in the opposite direction to open the ball valve (14) channel. The device is restored to normal particulate collection working state and the equipment can be put back into operation.

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