Centering and positioning device for grounding switch moving contact

Abstract

The utility model provides a centering and positioning device for a moving contact of a grounding switch, which is used for centering and positioning the moving contact in the installation process of the grounding switch, and comprises a support frame; the supporting frame comprises an upper supporting plate and a lower supporting plate, and the upper supporting plate and the lower supporting plate are fixedly installed through supporting columns according to an up-down structure. The plate surface of the lower supporting plate is provided with a centering sleeve suitable for inserting a moving contact; a preset number of limiting holes are formed in the plate surface of the upper supporting plate, the preset number of limiting holes are sequentially distributed in the plate surface of the upper supporting plate, and the distance between every two adjacent limiting holes is consistent with the distance between the moving contacts of the grounding switch, so that the moving contacts can penetrate through the limiting holes to be inserted into the centering sleeves of the lower supporting plate; and the centering positioning of the moving contact is realized. According to the centering and positioning device, the limiting holes are formed in the upper supporting plate, and the centering sleeves are fixedly placed on the lower supporting plate, so that the moving contacts penetrate through the limiting holes to be inserted into the corresponding centering sleeves, and centering and positioning of the moving contacts are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of high voltage switch technology, specifically, it relates to a centering and positioning device for the moving contact of a grounding switch. Background Technology

[0002] Gas-insulated switchgear (GIS) has been widely used in recent years due to its numerous advantages, including small footprint, strong environmental tolerance, high operational reliability, convenient operation, long maintenance cycle, and low maintenance workload. It integrates primary equipment (excluding transformers), including circuit breakers, isolating grounding switches, grounding switches, busbars, voltage transformers, current transformers, surge arresters, and cable terminals, into a single, optimized unit.

[0003] In GIS equipment, grounding switches have a certain ability to close short-circuit currents, playing a role in protecting electrical equipment and personal safety. The transmission mechanism of grounding switches is complex and assembly is relatively troublesome. During assembly, the moving contact needs to be manually aligned with the stationary contact. Inaccurate positioning of the moving contact during alignment can lead to incomplete or unstable alignment, potentially causing safety hazards. Therefore, how to achieve accurate alignment of the moving contact during grounding switch assembly has become a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a centering and positioning device for the moving contact of a grounding switch, which is used to center and position the moving contact during the installation of the grounding switch, including: a support frame;

[0005] The support frame includes an upper support plate and a lower support plate, which are fixedly installed together by pillars according to the upper and lower structure.

[0006] The lower support plate is provided with a centering sleeve suitable for inserting the moving contact;

[0007] The upper support plate has a preset number of limiting holes on its surface. The preset number of limiting holes are arranged sequentially on the surface of the upper support plate, and the distance between each pair of adjacent limiting holes is consistent with the distance between the moving contacts of the grounding switch, so that the moving contacts can pass through the limiting holes and be inserted into the centering sleeve of the lower support plate to achieve the centering and positioning of the moving contacts.

[0008] In one possible implementation, limiting grooves are provided on both sides of the limiting hole;

[0009] The main body of the limiting groove is concave. The recessed part of the limiting groove is set along the direction of the back of the lower support plate and is parallel to the plate surface of the upper support plate, so that when the moving contact passes through the limiting hole and is inserted into the centering sleeve, the tail of the moving contact is locked.

[0010] In one possible implementation, a sleeve hole is provided at one end of the centering sleeve facing the upper support plate, and the sleeve hole is adapted to the moving contact; at the same time, a connector is also provided at the centering sleeve facing the lower support plate, and the diameter of the connector is smaller than the diameter of the centering sleeve.

[0011] The connector has a screw hole at the end facing the lower support plate.

[0012] In one possible implementation, a through hole is provided on the surface of the lower support plate at a position corresponding to the limiting hole, and the connecting piece of the centering sleeve is adapted to the through hole so that the centering sleeve is fixedly placed on the lower support plate.

[0013] In one possible implementation, a support column is also included, which is fixedly connected to the upper support plate; the support column is suitable for supporting and positioning the support base assembly of the grounding switch.

[0014] The upper support plate has positioning holes on its edge, and the support column is fixedly connected to the upper support plate through the positioning holes.

[0015] In one possible implementation, the support column includes a connecting part and a supporting part;

[0016] The connecting part is fixedly connected to the supporting part, and the diameter of the connecting part is smaller than the diameter of the supporting part; the end of the supporting part facing the upper supporting plate is also provided with a screw hole so that the bolt passes through the positioning hole of the upper supporting plate and the screw hole of the supporting column and is fixedly connected to the upper supporting plate.

[0017] In one possible implementation, the surface of the upper support plate is also provided with a preset number of rectangular holes, and the size of the rectangular holes is not exactly the same.

[0018] The rectangular holes are all located on both sides of the limiting hole.

[0019] In one possible implementation, a baffle is also included, which is disposed on the side of the lower support plate facing the ground;

[0020] The baffle has a clearance hole in the center, and the diameter of the clearance hole is the same as the diameter of the screw hole of the centering sleeve, so that the bolt can pass through the clearance hole and the screw hole to fix the centering sleeve to the lower support plate.

[0021] Beneficial effects: The moving contact centering and positioning device of this application, by opening limiting holes on the upper support plate with a distance consistent with the spacing between the moving contacts, ensures the stability of the moving contacts during assembly while also maintaining the spacing between the moving contacts, preventing displacement of the moving contacts; moreover, the limiting holes are arranged sequentially along the central axis of the upper support plate, ensuring that the moving contacts of the grounding switch remain on the same central axis. The moving contact centering and positioning device of this application achieves centering and positioning of the moving contacts by inserting the moving contacts through the limiting holes in the upper support plate into the centering sleeve provided on the lower support plate.

[0022] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0023] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0024] Figure 1 This is a perspective view of a grounding switch moving contact centering and positioning device according to an embodiment of the present invention;

[0025] Figure 2 This is an embodiment of the present utility model. Figure 1 A front view of a device for centering and positioning moving contacts of a grounding switch;

[0026] Figure 3 This is an embodiment of the present utility model. Figure 1 Side view of a positioning device for aligning the moving contact of a grounding switch;

[0027] Figure 4 This is an embodiment of the present utility model. Figure 1 Front view of the support frame for the centering and positioning device of the moving contact of the grounding switch;

[0028] Figure 5 This is an embodiment of the present utility model. Figure 4 Top view of the support frame for the centering and positioning device of the moving contact of the grounding switch;

[0029] Figure 6 This is a schematic diagram of the centering sleeve for a centering and positioning device for a moving contact of a grounding switch according to an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of a baffle for a centering and positioning device for a grounding switch moving contact according to an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of a support column for a centering and positioning device for a grounding switch moving contact according to an embodiment of the present invention;

[0032] The attached diagram lists the components represented by each number as follows:

[0033] Support frame 100, upper support plate 110, limiting hole 111, limiting groove 112, recessed part 113, rectangular hole 114, positioning hole 115, lower support plate 120, through hole 121, support member 122, column 130, centering sleeve 140, sleeve hole 141, connector 142, screw hole 143, baffle 150, clearance hole 151, support column 160, connecting part 161, support part 162, fixing member 163, moving contact 200, moving contact tail 210, moving contact head 220, support base assembly 300.

[0034] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0035] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0036] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application or to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0038] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0039] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0040] Figure 1 This application shows a perspective view of the grounding switch moving contact centering and positioning device. Figure 2 This application is shown Figure 1 A front view of a device for centering and positioning the moving contact of a grounding switch. Figure 3 This application is shown Figure 1 A side view of a positioning device for aligning the moving contact of a grounding switch. Figure 4 This application is shown Figure 1 Front view of the support frame for the centering and positioning device of the moving contact of the grounding switch. Figure 5 This application is shown Figure 4 Top view of the support frame for the centering and positioning device of the moving contact of the grounding switch, according to Figures 1 to 5 As shown, this application provides a centering and positioning device for the moving contact of a grounding switch, used to center and position the moving contact during the installation of the grounding switch. The device includes a support frame 100, which includes an upper support plate 110 and a lower support plate 120. The upper support plate 110 and the lower support plate 120 are fixedly installed together by a column 130 in an upper-lower structure. The lower support plate 120 has a centering sleeve 140 suitable for inserting the moving contact 200. The upper support plate 110 has a preset number of limiting holes 111, which are arranged sequentially along the central axis of the upper support plate 110. The distance between any two adjacent limiting holes 111 is the same as the distance between the moving contacts 200 of the grounding switch, so that the moving contact 200 can pass through the limiting holes 111 and be inserted into the centering sleeve 140 of the lower support plate 120, thereby achieving the centering and positioning of the moving contact 200.

[0041] The centering and positioning device for the moving contact 200 in this application adopts an upper and lower support plate structure. A predetermined number of limiting holes 111 are sequentially opened along the central axis of the upper support plate 110, allowing the moving contact 200 to pass through the limiting holes 111 and be inserted into the centering sleeve 140 on the lower support plate 120 for centering and positioning. Furthermore, the limiting holes 111 on the upper support plate 110 prevent displacement of the moving contact 200 during installation. Simultaneously, the sequentially opened limiting holes 111 along the central axis of the upper support plate 110 ensure that the moving contacts 200 are aligned in a straight line during installation. Furthermore, the spacing between each adjacent limiting hole 111 is consistent with the spacing between the moving contacts 200, ensuring the spacing between the moving contacts 200 when installing them. This solves the safety problem caused by inaccurate positioning of the moving contacts 200 when installing the grounding switch, which leads to incomplete or unstable docking between the moving contacts 200 and the stationary contacts. This effectively improves the positioning accuracy of the moving contacts 200.

[0042] It should be noted that the support column 130 is used to support the upper support plate 110 and the lower support plate 120 of the fixed support frame 100; the limiting hole 111 is used to limit the moving contact 200 to ensure that the spacing between the three-phase moving contacts 200 is consistent; the centering sleeve 140 is used to protect the moving contact 200 and prevent damage to the moving contact 200.

[0043] Among them, see Figures 1 to 4 As shown, there are two support columns 130, which are arranged opposite each other between the upper support plate 110 and the lower support plate 120. The top of each support column 130 is fixedly connected to the upper support plate 110, and the bottom of each support column 130 is fixedly connected to the lower support plate 120.

[0044] In one possible implementation, the limiting holes 111 on the surface of the upper support plate 110 are rectangular, and three limiting holes 111 are provided, each corresponding to one of the three-phase moving contacts 200 of the grounding switch. Simultaneously, the windows of the limiting holes 111 undergo high-strength anti-corrosion treatment to enhance the service life of the centering and positioning device.

[0045] In one possible implementation, limiting grooves 112 are provided on both sides of the limiting hole 111, wherein the main body of the limiting groove 112 is concave, and the recessed portion 113 of the limiting groove 112 is arranged in the direction away from the lower support plate 120 and parallel to the plate surface of the upper support plate 110, so as to engage the tail 210 of the moving contact when the moving contact 200 passes through the limiting hole 111 and is inserted into the centering sleeve 140.

[0046] It should be noted that when installing the moving contact 200 of the grounding switch, the head 220 of the moving contact is first inserted through the limiting hole 111 into the corresponding centering sleeve 140. At the same time, the tail 210 of the moving contact will be locked in the limiting groove 112 to prevent the moving contact 200 from shifting on the upper support plate 110. Moreover, the limiting groove 112 is also used to ensure that the three-phase moving contacts 200 are inserted into the centering sleeve 140 at the same depth. That is, when the head 220 of the moving contact is inserted through the limiting hole 111 into the corresponding centering sleeve 140, since the three-phase moving contacts 200 are the same and the tail 210 of the moving contact is locked in the limiting groove 112, the length of the head 220 of the three-phase moving contacts inserted into the centering sleeve 140 is the same, that is, the depth of the three-phase moving contacts 200 inserted into the centering sleeve 140 is also the same.

[0047] In one possible implementation, limiting grooves 112 are formed on both sides of the three limiting holes 111, that is, six limiting grooves 112 are formed. At the same time, all six limiting grooves 112 are subjected to high-strength anti-corrosion treatment to enhance the service life of the centering and positioning device.

[0048] In one possible implementation, see [link to relevant documentation] Figure 1 As shown, the upper support plate 110 also has a preset number of rectangular holes 114 on its surface, and the sizes of the rectangular holes 114 are not exactly the same. The rectangular holes 114 are all located on both sides of the limiting hole 111. It should be noted that the rectangular holes 114 are used to reduce the production cost of the device without affecting its stability. At the same time, the windows of the rectangular holes 114 are subjected to high-strength anti-corrosion treatment to enhance the service life of the centering and positioning device.

[0049] It should be noted that, in one possible implementation, four rectangular holes 114 are provided, namely two larger rectangular holes 114 and two smaller rectangular holes 114. The two larger rectangular holes 114 are respectively located in the middle of each pair of adjacent limiting holes 111, and the two smaller rectangular holes 114 are respectively located next to the limiting holes 111 on both sides of the upper support plate 110, with the two smaller limiting holes located on the side of the limiting holes 111 facing away from the larger rectangular holes 114.

[0050] In one possible implementation, see [link to relevant documentation] Figure 6 As shown, the centering sleeve 140 has a sleeve hole 141 at one end facing the upper support plate 110, and the sleeve hole 141 is adapted to the moving contact 200, which is suitable for the moving contact 200 to be inserted into the centering sleeve 140 through the sleeve hole 141. It should be noted that the inner wall of the sleeve hole 141 and the centering sleeve 140 are integrally formed at the opening, and the connection is sloped.

[0051] Meanwhile, the centering sleeve 140 is also provided with a connector 142 facing the lower support plate 120, and the diameter of the connector 142 is smaller than the diameter of the centering sleeve 140. The connector 142 is integrally formed with the centering sleeve 140, and a screw hole 143 is provided at one end of the connector 142 facing the lower support plate 120, which is suitable for fixing the centering sleeve 140 and the lower support plate 120 together.

[0052] In one possible implementation, a through hole 121 is provided on the surface of the lower support plate 120 at a position corresponding to the limiting hole 111, and the connecting piece 142 of the centering sleeve 140 is adapted to the through hole 121 so that the centering sleeve 140 is fixedly placed on the lower support plate 120. The through hole 121 is suitable for the insertion of the connecting piece 142 of the centering sleeve 140, so that the centering sleeve 140 is locked within the through hole 121, preventing the centering sleeve 140 from shifting.

[0053] In one possible implementation, three through holes 121 are provided corresponding to the limiting holes 111. The three through holes 121 are arranged sequentially along the central axis on the lower support plate 120 and correspond one-to-one with the limiting holes 111. At the same time, three centering sleeves 140 are also provided on the surface of the lower support plate 120, and the three centering sleeves 140 are all placed at the through holes 121 provided in the lower support plate 120 to ensure that the moving contact 200 and the stationary contact are on the same center line when the grounding switch is assembled.

[0054] In one possible implementation, the connector 142 of the centering sleeve 140 is inserted into the through hole 121, and then the moving contact head 220 is inserted into the corresponding centering sleeve 140 after passing through the limiting hole 111. At the same time, the moving contact tail 210 is locked in the limiting groove 112. The moving contact 200 is fixed at both the limiting groove 112 and the centering sleeve 140 to prevent displacement during installation, thereby ensuring the positioning accuracy of the moving contact 200.

[0055] In one possible implementation, the centering sleeve 140 is made of nylon 66 material. The nylon 66 material centering sleeve 140 has high strength, good wear resistance, and low coefficient of friction, which can protect the moving contact 200 and prevent damage to the moving contact 200. At the same time, the nylon 66 material centering sleeve 140 will not deform after long-term use, which can also effectively improve the service life of the moving contact 200 centering and positioning device.

[0056] In one possible implementation, see [link to relevant documentation] Figure 7 As shown, the centering and positioning device of this application also includes a baffle 150, which is disposed on the side of the lower support plate 120 facing the ground. A clearance hole 151 is provided in the center of the baffle 150, and the diameter of the clearance hole 151 is the same as the diameter of the screw hole 143 of the centering sleeve 140, so that the bolt passes through the clearance hole 151 and the screw hole 143 to fix the centering sleeve 140 on the lower support plate 120.

[0057] In one possible implementation, the connecting part 161 142 of the centering sleeve 140 is inserted into the through hole 121, so that the centering sleeve 140 is placed on the lower support plate 120. Then, a baffle 150 is placed on the side of the lower support plate 120 facing the ground, corresponding to the through hole 121. Bolts are used to pass through the clearance hole 151 of the baffle 150 and the screw hole 143 of the connecting part 142, so that the baffle 150 and the centering sleeve 140 are fixed on the lower support plate 120, thereby realizing the detachable connection of the baffle 150, the lower support plate 120 and the centering sleeve 140.

[0058] It should be noted that a support member 122 is also provided on the side of the lower support plate 120 facing the ground, which is used to support the lower support plate 120 and prevent the bolts used for connection at the baffle 150 of the lower support plate 120 from directly contacting the ground.

[0059] In one possible implementation, the support member 122 is block-shaped and there are two of them. The two support members 122 are respectively located at the two side edges of the bottom surface of the lower support plate 120, and are both fixedly connected to the lower support plate 120.

[0060] In one possible implementation, see [link to relevant documentation] Figure 8 As shown, the centering and positioning device of this application also includes a support column 160, which is fixedly connected to the upper support plate 110. The support column 160 is suitable for supporting and positioning the support base assembly 300 of the grounding switch. The upper support plate 110 has a positioning hole 115 on its edge, and the support column 160 is fixedly connected to the upper support plate 110 through the positioning hole 115.

[0061] It should be noted that four positioning holes 115 are provided, and they are arranged in pairs opposite each other at the edge of the upper support plate 110. At the same time, four support columns 160 are also provided corresponding to the positioning holes 115, and the four support columns 160 are respectively located at the four positioning holes 115.

[0062] In one possible implementation, the support column 160 includes a connecting part 161 and a supporting part 162. The connecting part 161 is fixedly connected to the supporting part 162, and the diameter of the connecting part 161 is smaller than the diameter of the supporting part 162. The supporting part 162 also has a screw hole 143 at one end facing the upper support plate 110, so that the bolt passes through the positioning hole 115 of the upper support plate 110 and the screw hole 143 of the support column 160 and is fixedly connected to the upper support plate 110.

[0063] The connecting part 161 has threads on its surface, which is suitable for connecting the centering and positioning device of this application to the support base assembly 300 of the grounding switch, so as to achieve the support and positioning of the support base assembly 300 of the grounding switch. Specifically, when the connecting part 161 is passed through the mounting hole of the support base assembly 300, the support base assembly 300 will be locked onto the support part 162. At this time, the connecting part 161, which is protruding from the mounting hole of the support base assembly 300, is used to spirally connect the nut washer and the positioning nut to fix the centering and positioning device of this application to the support base assembly 300 of the grounding switch. Furthermore, the support column 160 is also suitable for preventing the support base assembly 300 from shaking when the moving contact 200 is installed. Meanwhile, since grounding switches are divided into maintenance grounding switches and fast grounding switches, and the moving contact size of the two types of grounding switches is the same, the support column 160 of this application makes there a gap between the support base assembly 300 and the upper support plate 200, which can be used for the centering and positioning of the moving contact 200 of the two types of grounding switches at the same time. Therefore, the versatility of the moving contact 200 centering and positioning device can be effectively improved.

[0064] Meanwhile, the support portion 162 is provided with a fastener 163, which is integrally formed with the support portion. The diameter of the fastener 163 is smaller than that of the support portion 162, and it is adapted to the positioning hole 115 so that the fastener 163 can be inserted into the positioning hole 115 to prevent the support column 160 from shifting. Moreover, the screw hole 143 is opened on the side of the fastener 163 facing the upper support plate 110, so that when the fastener 163 is inserted into the positioning hole 115, a bolt is used to pass through the positioning hole 115 and the screw hole 143 to fix it to the upper support plate 110.

[0065] In one possible implementation, the upper support plate 110, lower support plate 120, column 130, and support column 160 of the moving contact centering and positioning device of this application are all made of high-strength steel.

[0066] Therefore, the moving contact centering and positioning device of this application adopts an upper and lower support plate structure, and a predetermined number of limiting holes 111 are sequentially opened along the central axis of the upper support plate 110, so that the moving contact 200 can pass through the limiting holes 111 and be inserted into the centering sleeve 140 on the lower support plate 120 to achieve centering and positioning of the moving contact 200. Moreover, the limiting holes 111 on the upper support plate 110 can prevent the moving contact 200 from shifting during installation. At the same time, the limiting holes 111 are sequentially opened along the central axis of the upper support plate 110, ensuring that the moving contact 200 is on the same straight line during installation. Furthermore, the spacing between each adjacent limiting hole 111 is consistent with the spacing between the moving contacts 200, ensuring the spacing between the moving contacts 200 when installing them. This solves the safety hazard problem that occurs when the moving contacts of the grounding switch are not properly positioned or the connection between the moving contacts and the stationary contacts is unstable due to inaccurate positioning. This effectively improves the positioning accuracy of the moving contacts.

[0067] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A centering and positioning device for the moving contact of a grounding switch, characterized in that, For centering and positioning the moving contact during the installation of the grounding switch, including: a support frame; The support frame includes an upper support plate and a lower support plate, and the upper support plate and the lower support plate are fixedly installed together by a column in an upper and lower structure. The lower support plate is provided with a centering sleeve suitable for inserting the moving contact; The upper support plate has a preset number of limiting holes on its surface. The preset number of limiting holes are arranged sequentially on the surface of the upper support plate, and the distance between each two adjacent limiting holes is consistent with the distance between the moving contacts of the grounding switch, so that the moving contacts can pass through the limiting holes and be inserted into the centering sleeve of the lower support plate to achieve centering and positioning of the moving contacts.

2. The centering and positioning device for the moving contact of a grounding switch according to claim 1, characterized in that, Limiting grooves are provided on both sides of the limiting hole; The main body of the limiting groove is concave. The recessed part of the limiting groove is arranged in the direction away from the lower support plate and parallel to the surface of the upper support plate, so as to lock the tail of the moving contact when the moving contact passes through the limiting hole and is inserted into the centering sleeve.

3. The centering and positioning device for the moving contact of a grounding switch according to claim 1, characterized in that, The centering sleeve has a sleeve hole at one end facing the upper support plate, and the sleeve hole is adapted to the moving contact; at the same time, the centering sleeve is also provided with a connector facing the lower support plate, and the diameter of the connector is smaller than the diameter of the centering sleeve. The connector also has a screw hole at one end facing the lower support plate.

4. A centering and positioning device for a moving contact of a grounding switch according to any one of claims 1 to 3, characterized in that, A through hole is provided on the surface of the lower support plate at a position corresponding to the limiting hole, and the connecting piece of the centering sleeve is adapted to the through hole so that the centering sleeve is fixedly placed on the lower support plate.

5. A centering and positioning device for a moving contact of a grounding switch according to claim 1, characterized in that, It also includes a support column, which is fixedly connected to the upper support plate; the support column is used to support and position the support base assembly of the grounding switch. The upper support plate has positioning holes on its edge, and the support column is fixedly connected to the upper support plate through the positioning holes.

6. A centering and positioning device for a moving contact of a grounding switch according to claim 5, characterized in that, The support column includes a connecting part and a supporting part; The connecting part is fixedly connected to the supporting part, and the diameter of the connecting part is smaller than the diameter of the supporting part; the supporting part also has a screw hole at one end facing the upper supporting plate, so that the bolt passes through the positioning hole of the upper supporting plate and the screw hole of the supporting column and is fixedly connected to the upper supporting plate.

7. A centering and positioning device for a moving contact of a grounding switch according to claim 1, characterized in that, The surface of the upper support plate is also provided with a preset number of rectangular holes, and the size of the rectangular holes is not exactly the same; The rectangular holes are all located on both sides of the limiting hole.

8. A centering and positioning device for a moving contact of a grounding switch according to claim 1, characterized in that, It also includes a baffle, which is disposed on the side of the lower support plate facing the ground; The baffle has a clearance hole in the center, and the diameter of the clearance hole is the same as the diameter of the screw hole of the centering sleeve, so that the bolt passes through the clearance hole and the screw hole to fix the centering sleeve to the lower support plate.

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