Particle capturing structure of high-voltage switchgear

Abstract

The invention discloses a particle capturing structure of high-voltage switch equipment. The particle capturing structure comprises a shell, a capturing grating and two capturing pipes, wherein the capturing grating and the two capturing pipes are arranged in the shell; the capturing grating is arranged on the bottom side of an inner cavity of the shell, a capturing shielding cavity is formed in the capturing grating, the upper side of the capturing grating is provided with a protruding strip and a groove which are arranged at intervals in the axial direction of the shell, a plurality of collecting holes communicated with the capturing shielding cavity are formed in the bottom of the groove, the section of the protruding strip and the section of the groove are each of an arc-shaped structure, and the protruding strip and the groove are in smooth butt joint. The two capturing pipes are connected with the two sides of the capturing grating respectively, the two capturing pipes are arranged on the bottom side of the inner cavity of the shell in the axial direction of the shell, and a pipe body shielding interval is formed between the capturing pipes and the bottom side of the shell. According to the invention, the metal particles can be collected more effectively, and the discharge accident risk of the high-voltage switchgear caused by the movement of the metal particles is reduced.

Description

Technical Field

[0001] This invention relates to the field of high-voltage switchgear, and in particular to a particle capture structure for high-voltage switchgear. Background Technology

[0002] During the production, installation, and operation of existing high-voltage switchgear, a certain amount of metal particles inevitably are generated. The internal electric field of this switchgear causes these particles to move within the equipment, reducing its insulation performance and increasing the risk of discharge accidents. To address this, particle traps are installed inside the switchgear. These traps typically use a grid design, consisting of a trapping chamber and multiple grid holes communicating with it. The trapping chamber is an electric field shielded area. When metal particles fall into the trapping chamber through the grid holes, they are no longer affected by the electric field and remain inside, thus achieving particle collection. However, current particle traps are not very efficient at collecting metal particles, leaving a certain risk of discharge accidents within the high-voltage switchgear.

[0003] In view of the above problems, it is necessary to study a particle capture structure for high-voltage switchgear that can more effectively collect metal particles and reduce the risk of discharge accidents caused by the movement of metal particles in high-voltage switchgear. Summary of the Invention

[0004] The purpose of this invention is to provide a particle capture structure for high-voltage switchgear, which can more effectively collect metal particles and reduce the risk of discharge accidents caused by the movement of metal particles in high-voltage switchgear.

[0005] To achieve the above objectives, the solution of the present invention is: A particulate capture structure for a high-voltage switchgear includes a housing, a capture grid, and two capture tubes disposed within the housing. The capture grid is located on the bottom side of the housing cavity, forming a capture shielding cavity inside. The upper side of the capture grid has protrusions and grooves spaced apart along the axial direction of the housing. The bottom of the grooves has multiple collection holes communicating with the capture shielding cavity. The cross-sections of the protrusions and grooves are both arc-shaped, and the protrusions and grooves are smoothly joined. The two capture tubes are connected to both sides of the capture grid, and are disposed on the bottom side of the housing cavity along the axial direction of the housing, forming a tube shielding gap between the capture tubes and the bottom side of the housing.

[0006] A grid shielding gap is formed between the capture grid and the bottom side of the housing.

[0007] The particle capture structure of the high-voltage switchgear also includes a partition plate, which is disposed between the capture grid and the bottom side of the housing. The partition plate is arranged along the axial direction of the housing and separates the grid shielding intervals.

[0008] The capture grille is secured to the housing by multiple screws.

[0009] The capture grid is set to correspond to the opening and closing positions of the moving and stationary contacts of the high-voltage switchgear.

[0010] The housing is a cylindrical structure, and the capture grid is bent.

[0011] The capture grid includes a grid cover, a grid seat, and multiple plugs. The grid cover and the grid seat are connected vertically, and a capture shielding cavity is formed between the grid cover and the grid seat. The grid cover has a wavy structure and forms the convex strips and grooves. Each convex strip is connected to a plug on both sides.

[0012] The plug is inserted into the opening on the side of the protrusion.

[0013] The grille cover and grille seat are secured together by multiple screws.

[0014] The two ends of the grille cover are respectively formed with flanges, and the flanges are locked to the housing with screws.

[0015] After adopting the above scheme, the working principle of the present invention is as follows: The capture grid of this invention is set to correspond to the opening and closing positions of the moving and stationary contacts of the high-voltage switchgear, so that the metal particles generated by the opening and closing of the moving and stationary contacts will fall onto the upper side of the capture grid under the action of gravity. Among them, some metal particles will fall directly into the groove of the capture grid, while some metal particles will first fall onto the protrusion of the capture grid and then fall from the protrusion into the groove of the capture grid. The metal particles that enter the groove of the capture grid will fall from the collection hole into the capture shielding cavity. The metal particles are less affected by the electric field in the capture shielding cavity and will not escape from the capture shielding cavity, thereby realizing the collection of metal particles. In addition, some metal particles inside the shell will fall into the tube shielding gap formed between the capture tube and the bottom of the shell. The metal particles are less affected by the electric field in the tube shielding gap and will remain in the tube shielding gap, thereby achieving the collection of metal particles. As can be seen from the above, both the capture grid and the capture tube of the present invention can collect metal particles, greatly improving the collection efficiency of metal particles and reducing the risk of discharge accidents caused by the movement of metal particles in high-voltage switchgear. Furthermore, the convex strips of the capture grid can effectively guide metal particles into the grooves of the capture grid, so that metal particles falling on the upper side of the capture grid can fall from the collection holes of the grooves of the capture grid into the capture shielding cavity of the capture grid as much as possible, thus making the capture grid highly efficient in collecting metal particles. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 Cross-sectional view of the present invention Figure 1 .

[0018] Figure 3 Cross-sectional view of the present invention Figure 2 .

[0019] Figure 4 Cross-sectional view of the present invention Figure 3 .

[0020] Figure 5 Cross-sectional view of the present invention Figure 4 .

[0021] Figure 6 This is a schematic diagram of the structure of the capture grid of the present invention. Figure 1 .

[0022] Figure 7 This is a schematic diagram of the structure of the capture grid of the present invention. Figure 2 .

[0023] Figure 8 This is an exploded view of the structure of the capture grid of the present invention.

[0024] Label Explanation: Shell 1, tube shielding interval 101, grid shielding interval 102, Capture grille 2, capture shielding cavity 20, grille cover 21, raised strip 211, groove 212, grille seat 22, flange 213, plug 23, screw 24. Capture tube 3, Screw 4, Partition 5, Moving contact A, stationary contact B. Detailed Implementation

[0025] To further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0026] like Figures 1 to 8As shown, this invention discloses a particle capture structure for a high-voltage switchgear, comprising a housing 1, a capture grid 2 and two capture tubes 3 disposed within the housing 1; wherein, the housing 1 is used for the movement of the moving contact A and the stationary contact B of the high-voltage switchgear; the capture grid 2 is disposed on the bottom side of the inner cavity of the housing 1, and a capture shielding cavity 20 is formed inside the capture grid 2; the upper side of the capture grid 2 has protrusions 211 and grooves 212 spaced apart along the axial direction of the housing 1; the bottom of the grooves 212 has multiple collection holes 2121 communicating with the capture shielding cavity 20; the collection holes 2121 can be circular holes; the cross-sections of the protrusions 211 and the grooves 212 are both arc-shaped structures, and the protrusions 211 and the grooves 212 are smoothly connected; the two capture tubes 3 are respectively connected to the two sides of the capture grid 2, and the two capture tubes 3 are disposed on the bottom side of the inner cavity of the housing 1 along the axial direction of the housing 1, forming a tube shielding interval 101 between the capture tubes 3 and the bottom side of the housing 1.

[0027] The working principle of this invention is as follows: The capture grid 2 of this invention is set to correspond to the opening and closing positions of the moving contact A and the stationary contact B of the high-voltage switchgear, so that the metal particles generated by the opening and closing of the moving contact A and the stationary contact B will fall onto the upper side of the capture grid 2 under the action of gravity. Among them, some metal particles will fall directly into the groove 212 of the capture grid 2, while some metal particles will first fall onto the protrusion 211 of the capture grid 2 and then fall from the protrusion 211 into the groove 212 of the capture grid 2. The metal particles that enter the groove 212 of the capture grid 2 will fall into the capture shielding cavity 20 through the collection hole 2121. The metal particles are less affected by the electric field in the capture shielding cavity 20 and will not escape from the capture shielding cavity 20, thereby realizing the collection of metal particles. In addition, some metal particles inside the shell 1 will also fall into the tube shielding interval 101 formed between the capture tube 3 and the bottom side of the shell 1. The metal particles are less affected by the electric field in the tube shielding interval 101 and will remain in the tube shielding interval 101, thereby achieving the collection of metal particles. As can be seen from the above, both the capturing grid 2 and the capturing tube 3 of the present invention can collect metal particles, greatly improving the collection efficiency of metal particles and reducing the risk of discharge accidents caused by the movement of metal particles in high-voltage switchgear. Furthermore, the protrusions 211 of the capturing grid 2 can effectively guide metal particles into the grooves 212 of the capturing grid 2, so that the metal particles falling on the upper side of the capturing grid 2 can fall as far as possible from the collection holes 2121 of the grooves 212 of the capturing grid 2 into the capturing shielding cavity 20 of the capturing grid 2, thus making the capturing grid 2 highly efficient in collecting metal particles.

[0028] In an embodiment of the present invention, the housing 1 is a cylindrical structure, while the capture grid 2 is correspondingly curved, making the capture grid 2 easy to install.

[0029] In an embodiment of the present invention, the capture grid 2 may include a grid cover 21, a grid seat 22 and a plurality of plugs 23. The grid cover 21 and the grid seat 22 are connected vertically and vertically, and a capture shielding cavity 20 is formed between the grid cover 21 and the grid seat 22. The grid cover 21 has a wave-shaped structure and forms the convex strips 211 and grooves 212. Each convex strip 211 is connected to a plug 23 on both sides. The plug 23 and the opening on the side of the protrusion 211 can be inserted into each other, making the installation of the plug 23 simple. The grid cover 21 and the grid seat 22 can be locked by multiple screws 4, making the connection between the grid cover 21 and the grid seat 22 simple. The two ends of the grid cover 21 can be respectively formed with flanges 213, and the flanges 213 are locked to the housing 1 by screws 24. This setting makes a grid shielding interval 102 formed between the capturing grid 2 and the bottom side of the housing 1. In this way, some metal particles inside the housing 1 will also fall into the grid shielding interval 102 formed between the capturing grid 2 and the bottom side of the housing 1. The metal particles are less affected by the electric field in the grid shielding interval 102 and will remain in the grid shielding interval 102, thereby realizing the collection of metal particles and improving the collection efficiency of metal particles.

[0030] In an embodiment of the present invention, a particulate capture structure for a high-voltage switchgear may further include a partition 5. The partition 5 is disposed between the capture grid 2 and the bottom side of the housing 1. The partition 5 is arranged along the axial direction of the housing 1 and separates the grid shielding interval 102. The partition 5 can prevent airflow from passing through the grid shielding interval 102 and avoid the airflow from carrying away the metal particles remaining in the grid shielding interval 102.

[0031] The above embodiments and figures are not intended to limit the product form and style of the present invention. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims

1. A particle capture structure for high-voltage switchgear, characterized in that: Includes a housing, and a capture grid and two capture tubes disposed within the housing; The capture grid is set on the bottom side of the inner cavity of the shell, and the capture grid forms a capture shielding cavity. The upper side of the capture grid has convex strips and grooves spaced along the axial direction of the shell. The bottom of the groove has multiple collection holes communicating with the capture shielding cavity. The cross-section of the convex strip and the cross-section of the groove are both arc-shaped structures, and the convex strip and the groove are smoothly connected. Two capture tubes are connected to both sides of the capture grid, and the two capture tubes are arranged along the axial direction of the shell on the bottom side of the shell cavity, forming a tube shielding gap between the capture tubes and the bottom side of the shell.

2. The particle capture structure for a high-voltage switchgear as described in claim 1, characterized in that: A grid shielding gap is formed between the capture grid and the bottom side of the housing.

3. The particle capture structure for a high-voltage switchgear as described in claim 2, characterized in that: It also includes a partition, which is disposed between the capture grid and the bottom side of the housing. The partition is arranged along the axial direction of the housing and separates the grid shielding intervals.

4. A particle capture structure for a high-voltage switchgear as described in claim 1 or 2, characterized in that: The capture grille is secured to the housing by multiple screws.

5. The particle capture structure for a high-voltage switchgear as described in claim 1, characterized in that: The capture grid is set to correspond to the opening and closing positions of the moving and stationary contacts of the high-voltage switchgear.

6. The particle capture structure for a high-voltage switchgear as described in claim 1, characterized in that: The housing is a cylindrical structure, and the capture grid is bent.

7. The particle capture structure for a high-voltage switchgear as described in claim 1, characterized in that: The capture grid includes a grid cover, a grid seat, and multiple plugs. The grid cover and the grid seat are connected vertically, and a capture shielding cavity is formed between the grid cover and the grid seat. The grid cover has a wavy structure and forms the convex strips and grooves. Each convex strip is connected to a plug on both sides.

8. The particle capture structure for a high-voltage switchgear as described in claim 7, characterized in that: The plug is inserted into the opening on the side of the protrusion.

9. The particle capture structure for a high-voltage switchgear as described in claim 7, characterized in that: The grille cover and grille seat are secured together by multiple screws.

10. The particle capture structure for a high-voltage switchgear as described in claim 7, characterized in that: The two ends of the grille cover are respectively formed with flanges, and the flanges are locked to the housing with screws.

Images