Three-phase common box type high-speed grounding switch and gas-insulated metal-enclosed switchgear

Abstract

The invention relates to a three-phase common-box type high-speed grounding switch and a gas-insulated metal-enclosed switchgear. The three-phase common-box type high-speed grounding switch comprises a shell which limits the axial direction, and the cross section of the shell has the length direction and the width direction; the three grounding assemblies are arranged in parallel along the length direction; each grounding assembly comprises a grounding conductor arranged on the shell, a first conductive matching part fixed on the grounding conductor, a second conductive matching part assembled on the first conductive matching part in a sliding manner along the axial direction, a moving contact fixed on the second conductive matching part and a static contact used for being butted and matched with the moving contact; the rotating shaft penetrates through the shell and is used for being driven to rotate; and the linkage assembly is in transmission connection with the rotating shaft and the second conductive matching part. The overall structure of the three-phase common box type high-speed grounding switch can be compact.

Description

Technical Field

[0001] The present application relates to the technical field of high-voltage switches, and in particular to three-phase common-box fast grounding switches and gas-insulated metal-enclosed switchgear. Background Art

[0002] Gas Insulated Switchgear (GIS) is a complete set of switchgear consisting of a circuit breaker, disconnector, earthing switch, current transformer, voltage transformer, lightning arrester, busbar, incoming and outgoing bushings or cable terminals, etc., which are enclosed in a grounded metal casing and filled with SF6 gas at a certain pressure as the insulating medium and arc extinguishing medium.

[0003] In GIS, ordinary grounding switches are configured next to the disconnectors on both sides of the circuit breaker, and only serve the purpose of grounding on both sides during circuit breaker maintenance; while fast grounding switches are configured on the line side of the outgoing line disconnector of the outgoing line circuit, mainly to open and close the capacitive current generated by electrostatic induction and the inductive current generated by electromagnetic induction in the parallel overhead line, and to quickly ground the main circuit and use the circuit breaker to cut off the fault current.

[0004] Currently, the vast majority of GIS used in 66kV to 110kV substations adopt a three-phase common enclosure structure, meaning the three-phase conductors of the GIS are housed within a single chamber and fixedly mounted on pot-type insulators. However, in this three-phase common enclosure structure, the three-phase conductors are typically arranged in a "pin" shape, resulting in a large space requirement for the three-phase sub-enclosures. This not only increases the cost of the GIS but also makes it difficult to install in smaller sites. Summary of the Invention

[0005] Based on this, it is necessary to provide a three-phase common box type fast earthing switch and a gas-insulated metal-enclosed switchgear to address at least one of the above problems.

[0006] In the first aspect, the present application provides a three-phase common-box type fast earthing switch, which includes: a shell, the shell defines an axial direction, and the cross-section of the shell has a length direction and a width direction; three grounding components, arranged in parallel along the length direction, each grounding component includes a grounding conductor arranged on the shell, a first conductive matching part fixed to the grounding conductor, a second conductive matching part slidably assembled on the first conductive matching part along the axial direction, a moving contact fixed to the second conductive matching part, and a static contact for docking with the moving contact; a rotating shaft, which is passed through the shell and is used to be driven to rotate; and a linkage component, which is transmission-connected to the rotating shaft and the second conductive matching part.

[0007] By arranging the three grounding components in a straight line and the shell having length and width dimensions, the overall structure of the three-phase common box type fast grounding switch can be more compact, which can save redundant materials; the size can be made smaller and the installation is convenient.

[0008] In some embodiments, one of the first conductive mating portion and the second conductive mating portion includes a sleeve, and the other includes a guide post passing through the sleeve.

[0009] With such arrangement, the first conductive matching portion and the second conductive matching portion are easy to install and can slide stably.

[0010] In some embodiments, the grounding conductor, the sleeve, the guide post, and the moving contact are coaxially arranged; the grounding assembly further includes a contact finger, which is arranged on the inner wall of the sleeve to abut against the guide post.

[0011] With such an arrangement, the three-phase common box type fast earthing switch has a compact structure and the dimension of the housing along the width direction can be made smaller.

[0012] In some embodiments, the linkage assembly includes a crank arm and a connecting structure; along the radial direction of the rotating shaft, one end of the crank arm is fixed to the rotating shaft, and the other end of the crank arm includes a slider; one end of the connecting structure is fixed to the second conductive matching part, and the other end is provided with a slide groove, the slide groove is slidably matched with the slider, and the extension direction of the slide groove is intersected with the axial direction.

[0013] With this arrangement, the linkage assembly has a stable structure and a small range of motion, which helps to reduce occupied space.

[0014] In some embodiments, the connection structure includes a connecting plate and an operating rod; the connecting plate is fixed to the three second conductive matching parts; the operating rod extends axially, one end is fixed to the connecting plate, and the other end is provided with a sliding groove.

[0015] With such an arrangement, the connection structure can occupy less space, achieve synchronous sliding of the three moving contacts, and improve the structural rigidity of the three grounding components.

[0016] In some embodiments, the rotating shaft extends in the width direction and is disposed between the two grounding assemblies; the connecting structure includes two operating rods disposed on both sides of the grounding assembly at a middle position in the width direction, and the operating rods extend in the axial direction.

[0017] With such an arrangement, the structure is compact, the space of the housing along the length direction is effectively utilized, and the operating rod can transmit power stably and reliably.

[0018] In some embodiments, the operating rod, the crank arm, and the rotating shaft are all located on a side of the connecting plate facing the ground conductor.

[0019] With this arrangement, the structure is compact and the axial space of the housing is effectively utilized.

[0020] In some embodiments, a three-phase common-box rapid earthing switch includes an integrated mounting shell, the mounting shell including a housing, a mechanism mounting platform, a shaft mounting boss, a hand hole, a grounding boss, a gas-filling boss, and a flange; the mechanism mounting platform and the shaft mounting boss are disposed on both sides of the housing in the width direction, and the shaft passes through the mechanism mounting platform and the shaft mounting boss in the width direction; the hand hole and the shaft mounting boss are disposed on the same side of the housing; the grounding boss and the gas-filling boss are disposed on both sides of the housing in the length direction; and the flange is disposed at the end of the housing facing the static contact. Exemplarily, the three-phase common-box rapid earthing switch also includes: a rotary drive member disposed on the mechanism mounting platform for driving the shaft; a grounding copper busbar located outside the housing, the grounding copper busbar being connected to three grounding conductors; and an adsorbent and / or an explosion-proof device mounted in the hand hole.

[0021] With such arrangement, the mounting shell is easy to be installed in the mounting position and the components are easy to be assembled; the three-phase common box type fast earthing switch is safe to use.

[0022] In some embodiments, the static contact has a static contact hole, the outer end of which gradually reduces in diameter from the outside to the inside; and the spherical end of the movable contact can be partially embedded in the static contact hole.

[0023] Such an arrangement effectively ensures the accuracy of the docking fit between the moving contact and the static contact.

[0024] In a second aspect, the present application provides a gas-insulated metal-enclosed switchgear, which includes the aforementioned three-phase common-chamber type fast earthing switch.

[0025] The gas-insulated metal-enclosed switchgear of the embodiment of the present application has a good safety protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic top view of a three-phase common box type fast earthing switch according to one or more embodiments;

[0027] Figure 2 for Figure 1 A schematic cross-sectional view at section AA;

[0028] Figure 3 for Figure 1 Schematic cross-sectional view at section BB;

[0029] Figure 4 is a schematic diagram of the working state of the linkage assembly and the grounding assembly according to one or more embodiments;

[0030] Figure 5 is a structural schematic diagram of a docking state of a moving contact and a static contact according to one or more embodiments;

[0031] Figure 6 is a schematic isometric diagram of a three-phase common box type fast earthing switch according to one or more embodiments;

[0032] Figure 7 Schematic side view of a three-phase common box type fast earthing switch according to one or more embodiments.

[0033] Explanation of reference numerals: 1, mounting shell; 11, housing; 12, mechanism mounting platform; 13, shaft mounting boss; 14, hand hole; 15, grounding boss; 16, inflation hole boss; 17, flange;

[0034] 2. Grounding assembly; 21. Grounding conductor; 22. Moving contact; 23. Stationary contact; 231. Stationary contact hole; 24. First conductive mating portion; 25. Second conductive mating portion; 26. First screw; 27. Second screw; 28. Contact finger;

[0035] 3. Rotating shaft; 4. Linkage assembly; 40. Connecting structure; 41. Connecting plate; 42. Operating lever; 421. Slide; 43. Crank arm; 431. Slider;

[0036] 1000. Three-phase common box type fast earthing switch; 1100. Rotating drive component; 1200. Grounding copper busbar; 1300. Adsorbent and explosion-proof device; 1400. Barometer. DETAILED DESCRIPTION

[0037] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the connotations of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "perpendicular", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0040] Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. For example, a first grounding component may also be referred to as a second grounding component, and a second grounding component may also be referred to as a first grounding component. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0041] In this application, unless otherwise clearly specified and limited, the terms "connected", "connect", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a flexible connection, or a rigid connection along at least one direction; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or directly connected with an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. The terms "install", "set", "fix", etc. can be broadly understood as connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] refer to Figure 1 , Figure 1 The embodiment of the present application shows a three-phase common box type fast earthing switch. In the exemplary embodiment, the three-phase common box type fast earthing switch 1000 includes a housing 11, three grounding components 2, a rotating shaft 3 and a linkage component 4.

[0043] refer to Figure 1 、 Figure 2 and Figure 3 For example, the three-phase common box type fast earthing switch 1000 includes a mounting shell 1. The mounting shell 1 can be an integrated structure, and the housing 11 can be a part of the mounting shell 1. The mounting shell 1 can be assembled with other components to form a sealed cavity.

[0044] For the convenience of description, a spatial rectangular coordinate system XYZ is established. The shell 11 may be defined in an axial direction, a length direction, and a width direction. The axial direction may be roughly parallel to the Z-axis direction, the length direction may be roughly parallel to the X-axis direction, and the width direction may be roughly parallel to the Y-axis direction. The cross section of the shell 11 may be roughly parallel to the XY plane. The shell 11 may be designed as an elliptical structure. For example, the outer contour of the cross section of the shell 11 may be roughly elliptical, a rounded rectangle, or an oblong. One end of the shell 11 along the axial direction may be a wall panel, and the other end may be open.

[0045] The three grounding assemblies 2 are arranged in parallel along the length, each used to ground a phase line. They can be aligned axially. The linear arrangement of the three grounding assemblies 2 and the length and width of the housing 11 make the overall structure of the three-phase common-chamber fast-acting earthing switch 1000 relatively compact, eliminating excess material and enabling smaller dimensions for easier installation.

[0046] The grounding assembly 2 includes a grounding conductor 21 , a movable contact 22 , a stationary contact 23 , a first conductive mating portion 24 and a second conductive mating portion 25 .

[0047] A grounding conductor 21 is disposed within the housing 11, with one end of the grounding conductor 21 located within the housing 11 and the other end exposed outside the housing 11. The grounding conductor 21 is sealed within the housing 11 and may be insulated from the housing 11 by an insulating layer. The grounding conductor 21 may be axially disposed on the top wall of the housing 11.

[0048] The first conductive mating portion 24 is fixed to the ground conductor 21. The first conductive mating portion 24 can be located within the housing 11. The second conductive mating portion 25 is axially slidably assembled with the first conductive mating portion 24. The first and second conductive mating portions 24, 25 cooperate to achieve assembly, limited movement, and electrical conduction. The second conductive mating portion 25 is assembled with the first conductive mating portion 24, saving space, facilitating easy assembly, and maintaining a compact structure.

[0049] The movable contact 22 is fixed to the second conductive matching portion 25. Specifically, the movable contact 22 is axially fixed to the lowermost end of the second conductive matching portion 25. The movable contact 22 can be electrically connected to the ground conductor 21 through the second conductive matching portion 25 and the first conductive matching portion 24.

[0050] In other embodiments, the ground conductor 21 and the first conductive matching portion 24 may serve as the first conductive portion, and the second conductive matching portion 25 and the movable contact 22 may serve as the second conductive portion.

[0051] The static contact 23 can be installed separately and can be kept in a fixed position relative to the housing 11. The static contact 23 is used to axially dock with the moving contact 22. Figure 2As shown, the moving contact 22 can have a position away from the static contact 23 along the sliding direction; Figure 5 The movable contact 22 also has a position for docking with the stationary contact 23. When the movable contact 22 docks with the stationary contact 23, the stationary contact 23 is connected to the ground conductor 21.

[0052] refer to Figure 1 and Figure 3 The rotating shaft 3 is disposed through the housing 11 and is driven to rotate. For example, the rotating shaft 3 is disposed substantially along the width of the housing 11, which shortens the shaft length and facilitates installation. One end of the rotating shaft 3 may extend outside the housing 11. The rotating shaft 3 and the housing 11 may be rotationally connected via a bearing, and the rotating shaft 3 and the housing 11 are sealed.

[0053] The linkage assembly 4 is connected to the rotating shaft 3 and the second conductive mating portion 25. The linkage assembly 4 is used to convert the rotational motion of the rotating shaft 3 into linear motion along the Z-axis, with forward or reverse rotation being converted into upward or downward motion. The linkage assembly 4 can simultaneously drive all of the second conductive mating portions 25. Alternatively, the linkage assembly 4 can indirectly or directly drive the movable contact 22. The rotating shaft 3 can drive the movable contact 22 to reciprocate relative to the grounding conductor 21 through the linkage assembly 4, thereby connecting or disconnecting the movable contact 22 with the stationary contact 23. The travel of the movable contact 22 can be shorter than the sliding travel of the second conductive mating portion 25.

[0054] The three-phase common box type fast earthing switch 1000 of the embodiment of the present application is provided with a rotating shaft 3 and a linkage assembly 4, and the movable contact 22 is slidably connected to the grounding conductor 21, thereby stably converting the rotational movement of the rotating shaft 3 into the movement of the movable contact 22, so that the movable contact 22 can be linearly docked with the static contact 23, thereby quickly realizing the grounding of the electrical system, and effectively ensuring the accuracy of the docking and matching of the movable contact 22 and the static contact 23, thereby ensuring the safety protection effect of the electrical system.

[0055] For example, one of the first conductive matching portion 24 and the second conductive matching portion 25 may include a sleeve, and the other may include a guide post passing through the sleeve. Figure 2 As shown, the first conductive matching portion 24 includes a sleeve, and the second conductive matching portion 25 includes a guide column. The second conductive matching portion 25 is inserted into the first conductive matching portion 24, eliminating the need for an additional mounting limit structure, facilitating assembly, and enabling stable sliding after assembly.

[0056] The grounding assembly 2 also includes a contact finger 28. The contact finger 28 can be positioned on the inner wall of the sleeve to abut against the outer wall of the guide post. The contact finger 28 is electrically conductive and resiliently maintains contact. The outer diameter of the guide post can be slightly smaller than the inner diameter of the sleeve. This results in a compact structure between the second conductive mating portion 25 and the first conductive mating portion 24, reducing manufacturing complexity and improving mating performance. The width of the grounding assembly 2 and the housing 11 housing it can be relatively small.

[0057] The grounding assembly 2 may further include a first screw 26. The first screw 26 may be axially inserted into the sleeve of the first conductive mating portion 24 to secure it to the grounding conductor 21. This installation method of the first screw 26 saves space. The grounding assembly 2 may further include a pin. The pin may be axially inserted into the sleeve of the first conductive mating portion 24 to secure it to the grounding conductor 21. This prevents the first conductive mating portion 24 from rotating relative to the grounding conductor 21, preventing the first screw 26 from loosening.

[0058] The first conductive mating portion 24 can be a cylindrical tube, and the second conductive mating portion 25 can be a circular guide post. During installation, the second conductive mating portion 25 can rotate relative to the first conductive mating portion 24, facilitating installation. The second conductive mating portion 25 can be a circular tube with ventilation holes to balance the air pressure between the space between the first and second conductive mating portions 24, 25 and the space within the housing 11.

[0059] refer to Figure 2 Combined with Figure 3 As shown, the grounding conductor 21, sleeve, guide post, and movable contact 22 are coaxially arranged, and the stationary contact 23 can also be coaxially arranged. The grounding assembly 2 has a compact structure. The upper end of the movable contact 22 can be a threaded section that is threadedly connected to the lower end of the second conductive mating portion 25.

[0060] Combine Figure 3 and Figure 4 As shown, in some embodiments, the linkage assembly 4 includes a crank arm 43 and a connecting structure 40. The rotating shaft 3 can be arranged along the Y-axis direction. One end of the crank arm 43 is fixed to the rotating shaft 3, and the other end of the crank arm 43 along the radial direction of the rotating shaft 3 includes a slider 431. The position of the crank arm 43 avoids the grounding assembly 2, and when the whole rotates with the rotating shaft 3, the swing stroke of the slider 431 also avoids the grounding assembly 2. One end of the connecting structure 40 is fixed to the second conductive matching part 25 and can connect all the second conductive matching parts 25. The other end is provided with a slide groove 421, and the slide groove 421 is slidably matched with the slider 431. The extension direction of the slide groove 421 is intersecting with the axial direction. A part of the structure of the connecting structure 40 can form an L shape. The linkage assembly 4 may include two rigid components to convert rotation into sliding. The structure of the linkage assembly 4 is stable and the movement amplitude is small, which is conducive to reducing the occupied space.

[0061] by Figure 4Taking the perspective shown as an example, when grounding is required, the rotating shaft 3 drives the crank arm 43 to rotate counterclockwise, and the slider 431 presses the connecting structure 40 downward, causing the moving contact 22 to mate with the static contact 23, thus closing the circuit breaker. When grounding is no longer required, the rotating shaft 3 drives the crank arm 43 to rotate clockwise, and the slider 431 presses the connecting structure 40 upward, causing the moving contact 22 to separate from the static contact 23, thus opening the circuit breaker.

[0062] The slideway 421 can extend along the X-axis, with a length sufficient to accommodate the positional variations of the slider 431's arcuate motion path. Exemplarily, the slider 431 is a cylindrical structure fixed to the body of the crank arm 43, such as a latch. This provides the crank arm 43 with structural strength and agility. The slider 431 is also rotatably connected to the body of the crank arm 43.

[0063] The rotation range of the crank arm 43 can be about 60 degrees. With reference to the horizontal plane passing through the rotating shaft 3, the upper and lower positions of the crank arm 43 can be symmetrical relative to the horizontal plane. A section of the rotating shaft 3 where the crank arm 43 is provided can be a hexagonal prism.

[0064] The connection structure 40 includes a connecting plate 41 and an operating rod 42. The connecting plate 41 is an insulating plate. The operating rod 42 extends axially, with one end fixed to the connecting plate 41 and the other end having a slide groove 421. The operating rod 42 can effectively transmit axial thrust or tension.

[0065] refer to Figure 4 and Figure 2 The connecting plate 41 is fixed to the three second conductive mating portions 25 and is used to synchronously drive the three second conductive mating portions 25. The provision of the connecting plate 41 allows for fewer operating rods 42 and crank arms 43, resulting in a smaller space for the connecting structure 40 and the linkage assembly 4, enabling synchronized sliding of the three moving contacts 22. The location of the connecting plate 41 on the second conductive mating portions 25, close to the moving contacts 22, enhances the structural rigidity of the three grounding assemblies 2 and facilitates stable sliding.

[0066] The lower end of the second conductive matching part 25 may be provided with a shoulder, and the connecting plate 41 may be provided with a countersunk hole, and the shoulder fits into the countersunk hole. The lower end of the second conductive matching part 25 protrudes from the connecting plate 41 and can be configured as a threaded section. The second conductive matching part 25 can be locked to the connecting plate 41 using a nut.

[0067] refer to Figure 3 The connection structure 40 may include two operating rods 42 and, correspondingly, two crank arms 43. The operating rods 42 are fixed to the connecting plate 41. The rotating shaft 3 extends in the width direction. The swinging plane of the crank arm 43 may be substantially parallel to the XZ plane. Along the Y-axis, the two operating rods 42 may be located on either side of the grounding assembly 2. The two operating rods 42 ensure stable and reliable power transmission.

[0068] refer to Figure 4The rotating shaft 3 is positioned between two grounding assemblies 2, for example, between the first and second grounding assemblies from the right. The slider 431 of the crank arm 43 is positioned approximately at the second grounding assembly. Furthermore, the two operating levers 42 of the connecting structure 40 are positioned on either side of the middle grounding assembly. The operating levers 42 are also connected approximately at the middle of the connecting plate 41. The rotating shaft 3, linkage assembly 4, and three grounding assemblies 2 are compactly constructed, effectively utilizing the space along the length of the housing 11.

[0069] The operating rod 42, the crank arm 43 and the rotating shaft 3 are all located on the side of the connecting plate 41 facing the ground conductor 21. The rotating shaft 3, the linkage assembly 4 and the three grounding assemblies 2 have a compact overall structure, and the axial space of the housing 11 is effectively utilized.

[0070] refer to Figure 5 The static contact 23 has a static contact hole 231, and the outer end of the static contact hole 231 gradually reduces its aperture from the outside to the inside. The outer end of the static contact hole 231 may be in a circular ring shape. The spherical end of the moving contact 22 can be partially embedded in the static contact hole 231. The moving contact 22 and the static contact 23 can be accurately docked and matched, and can be quickly disengaged. In the three-phase common box type fast grounding switch 1000 provided in the embodiment of the present application, through the stable and consistent transmission of the rotating shaft 3 and the linkage assembly 4, the moving contact 22 and the static contact 23 of the grounding assembly 2 can move relative to each other at an appropriate speed and have a certain arc extinguishing ability.

[0071] refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 6 and Figure 7 The three-phase, common-chamber, fast-acting earthing switch 1000 includes a mounting housing 1. The mounting housing 1 can be a one-piece structure. It can also include assembled and fixed components, such as a cover. For example, the mounting housing 1 includes a shell 11, a mechanism mounting platform 12, a shaft mounting boss 13, a hand hole 14, a grounding boss 15, a vent boss 16, and a flange 17.

[0072] The two side surfaces of the housing 11 along the length direction can be curved surfaces, and the two side surfaces along the width direction can be flat surfaces. The mechanism mounting platform 12, the shaft mounting boss 13, the hand hole 14, the grounding boss 15 and the inflation hole boss 16 can protrude from the housing 11 respectively.

[0073] refer to Figure 1 、 Figure 3 and Figure 6The mechanism mounting platform 12 and the shaft mounting boss 13 can be disposed on both sides of the housing 11 along the width direction, and the shaft 3 is disposed through the mechanism mounting platform 12 and the shaft mounting boss 13 along the width direction. The three-phase common box type fast earthing switch 1000 also includes a rotary drive member 1100, which is disposed on the mechanism mounting platform 12 and is used to drive the shaft 3.

[0074] refer to Figure 1 and Figure 6 The hand hole 14 and the shaft mounting boss 13 can be located on the same side of the housing 11. The three-phase common box type fast earthing switch 1000 also includes an adsorbent and an explosion-proof device 1300. The adsorbent and explosion-proof device 1300 are installed in the hand hole 14 to help protect the three-phase common box type fast earthing switch 1000. The three-phase common box type fast earthing switch 1000 can include an adsorbent or an explosion-proof device.

[0075] refer to Figure 1 、 Figure 2 and Figure 6 The grounding boss 15 and the inflation hole boss 16 can be arranged on both sides of the housing 11 along the length direction. The inflation hole boss 16 can be a circular boss. The three-phase common box type fast grounding switch 1000 can include a pressure gauge 1400, which is arranged on the inflation hole boss 16. Figure 7 The grounding boss 15 can be a square boss. When the housing 11 needs to be grounded, the height position of the grounding boss 15 can be designed according to the installation space, and four threaded holes can be configured for connection.

[0076] The three-phase common-box fast grounding switch 1000 may further include a grounding copper busbar 1200. The grounding copper busbar 1200 is located outside the housing and connects the three grounding conductors 21 via the grounding copper busbar 1200. The grounding copper busbar 1200 may be fixed to the grounding conductor 21 via a second screw 27.

[0077] Based on the design of the installation space, the static contact 23 can be located outside the housing 11. A flange 17 is provided on the end of the housing 11 facing the static contact 23. The flange 17 can extend outward from the lower end of the housing 11. The flange 17 can include through holes for securing the three-phase common-chamber fast-acting earthing switch 1000 and through holes for support. The positioning of various components within the mounting housing 1 can be tailored to the engineering design, facilitating assembly to the mounting housing 1. The mounting housing 1 can also be easily installed in its proper location.

[0078] The embodiments of the present application also provide a gas-insulated metal-enclosed switchgear. The gas-insulated metal-enclosed switchgear includes the aforementioned three-phase common-chamber type rapid earthing switch 1000, thereby providing better safety protection, easy assembly, and compact structure.

[0079] The technical features of the embodiments disclosed above can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The embodiments disclosed above merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent protection of the present application. It should be noted that a person skilled in the art could make several variations and improvements without departing from the concept of the present application, all of which fall within the scope of the patent protection claimed by the present application. Therefore, the scope of the patent protection of the present application shall be subject to the appended claims.

Claims

1. Three-phase common box type fast earthing switch, characterized by: include: a housing, wherein the housing defines an axial direction and a cross section of the housing has a length direction and a width direction; Three grounding assemblies are arranged in parallel along the length direction, each of the grounding assemblies includes a grounding conductor provided on the housing, a first conductive matching portion fixed to the grounding conductor, a second conductive matching portion slidably assembled on the first conductive matching portion along the axial direction, a movable contact fixed to the second conductive matching portion, and a static contact for docking with the movable contact; a rotating shaft, passing through the housing and configured to be driven to rotate; and A linkage assembly is transmission-connected to the rotating shaft and the second conductive matching portion.

2. The three-phase common box type fast earthing switch according to claim 1, characterized in that: One of the first conductive matching portion and the second conductive matching portion includes a sleeve, and the other includes a guide post passing through the sleeve.

3. The three-phase common box type fast earthing switch according to claim 2, characterized in that: The grounding conductor, the sleeve, the guide post and the moving contact are coaxially arranged; The grounding assembly further includes a contact finger, which is arranged on the inner wall of the sleeve to abut against the guide post.

4. The three-phase common box type fast earthing switch according to claim 1, characterized in that: The linkage assembly includes a crank arm and a connecting structure; Along the radial direction of the rotating shaft, one end of the crank arm is fixed to the rotating shaft, and the other end of the crank arm includes a slider; One end of the connecting structure is fixed to the second conductive matching portion, and the other end is provided with a sliding groove, the sliding groove is slidably matched with the slider, and the extending direction of the sliding groove intersects with the axial direction.

5. The three-phase common box type fast earthing switch according to claim 4, characterized in that: The connecting structure includes a connecting plate and an operating rod; The connecting plate is fixed to the three second conductive matching parts; The operating rod extends along the axial direction, one end of the operating rod is fixed to the connecting plate, and the other end is provided with the sliding groove.

6. The three-phase common box type fast earthing switch according to claim 5, characterized in that: The rotating shaft extends along the width direction and is arranged between the two grounding components; The connection structure includes two operating rods arranged on both sides of the grounding assembly at a middle position along the width direction, and the operating rods extend along the axial direction.

7. The three-phase common box type fast earthing switch according to claim 5, characterized in that: The operating rod, the crank arm and the rotating shaft are all located on a side of the connecting plate facing the grounding conductor.

8. The three-phase common box type fast earthing switch according to claim 1, characterized in that: The three-phase common box type fast earthing switch includes an integrated mounting shell, which includes the housing, a mechanism mounting platform, a shaft mounting boss, a hand hole, a grounding boss, an inflation hole boss, and a flange; The mechanism mounting platform and the shaft mounting boss are arranged on both sides of the shell along the width direction, and the shaft passes through the mechanism mounting platform and the shaft mounting boss along the width direction; the hand hole and the shaft mounting boss are arranged on the same side of the shell; the grounding boss and the inflation hole boss are arranged on both sides of the shell along the length direction; The flange is provided at one end of the housing facing the static contact; The three-phase common box type fast earthing switch also includes: A rotary drive member, disposed on the mechanism mounting platform, for driving the rotating shaft; a grounding copper busbar, located outside the housing, the grounding copper busbar being connected to the three grounding conductors; and An adsorbent and / or an explosion-proof device is installed in the hand hole.

9. The three-phase common box type fast earthing switch according to claim 1, characterized in that: The static contact has a static contact hole, and the diameter of the outer end of the static contact hole gradually decreases from the outside to the inside; The spherical end of the movable contact can be partially embedded in the stationary contact hole.

10. Gas-insulated metal-enclosed switchgear, characterized in that: It comprises the three-phase common box type fast earthing switch according to any one of claims 1 to 9.

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