Grounding switch and switchgear

Abstract

The application belongs to the technical field of switches and particularly relates to a grounding switch and a switch cabinet. The grounding switch comprises a static contact and a dynamic contact. The static contact comprises a first static contact plate and a second static contact plate which are connected perpendicularly to each other. The dynamic contact comprises a first dynamic blade and a second dynamic blade which are arranged oppositely. The first static contact plate is arranged on the side of the second static contact plate close to the dynamic contact. When the switch is closed, the dynamic contact can move to the side close to the static contact, so that the first static contact plate is clamped between the first dynamic blade and the second dynamic blade and is in contact with the first dynamic blade and the second dynamic blade. When the switch is opened, the first dynamic blade and the second dynamic blade can move to the side away from the static contact, so that the first dynamic blade and the second dynamic blade are separated from the first static contact plate. The application can improve the insulation performance of the grounding switch, reduce the force arm of the dynamic contact, and make the operation of the dynamic contact more labor-saving.

Description

Technical Field

[0001] This application belongs to the field of switch technology, specifically relating to a grounding switch and switch cabinet. Background Technology

[0002] 40.5kV high-voltage switchgear has been widely used in substations. As one of its core components, the grounding switch is often used during maintenance to ensure the personal safety of personnel. It also protects the system in case of misoperation or short-circuit fault.

[0003] The 40.5kV high-voltage switchgear has very high requirements for the insulation performance, dynamic and thermal stability of the grounding switch. However, the electric field distribution of the static contacts in the existing grounding switches is uneven and the insulation effect is poor. Utility Model Content

[0004] The purpose of this application is to solve the problems of uneven electric field distribution and poor insulation effect of static contacts in related technologies.

[0005] A first aspect of this application provides a grounding switch, comprising: a stationary contact including a first stationary contact plate and a second stationary contact plate perpendicularly connected to each other; and a moving contact including a first moving blade and a second moving blade disposed opposite to each other; wherein the first stationary contact plate is disposed on the side of the second stationary contact plate near the moving contact, and when the switch is closed, the moving contact can move towards the side closer to the stationary contact, so that the first stationary contact plate is sandwiched between the first moving blade and the second moving blade and contacts the first moving blade and the second moving blade; when the switch is open, the first moving blade and the second moving blade can move away from the stationary contact, so that the first moving blade and the second moving blade are separated from the first stationary contact plate.

[0006] In one exemplary embodiment of this application, the distance between the first moving blade and the second moving blade is less than or equal to the width of the first stationary contact plate.

[0007] In an exemplary embodiment of this application, the moving contact further includes a connector, a first limiting member, and an elastic member. The connector passes through the first moving blade and the second moving blade in sequence. At least one end of the connector is fitted with the first limiting member and the elastic member. The elastic member and the first limiting member are both located on the side of the first moving blade or the second moving blade away from the second moving blade or the first moving blade. The opposite ends of the elastic member abut against the first limiting member and the first moving blade or the second moving blade and undergo compression deformation to apply a force toward the second moving blade or the first moving blade.

[0008] In one exemplary embodiment of this application, the moving contact further includes a second limiting member, which is sleeved on the connector and located between the first moving blade and the second moving blade to limit the distance between the first moving blade and the second moving blade.

[0009] In one exemplary embodiment of this application, the first limiting member includes a retaining ring and a fixing cap. The fixing cap contacts the end of the elastic member away from the first moving blade or the second moving blade. The retaining ring is fixedly connected to the connecting member and is located on the side of the fixing cap away from the elastic member.

[0010] In one exemplary embodiment of this application, the grounding switch further includes an insulating element connected to the stationary contact.

[0011] In one exemplary embodiment of this application, the grounding switch includes a first-phase stationary contact, a second-phase stationary contact, and a third-phase stationary contact, with the second-phase stationary contact located between the first-phase stationary contact and the third-phase stationary contact; the insulating components of the first-phase stationary contact and the third-phase stationary contact are insulating covers with protective plates, the insulating cover having a covering cavity for accommodating the first-phase stationary contact and the third-phase stationary contact, and the insulating cover having a clearance opening for the moving contact to move, the first moving blade and the second moving blade being able to move towards or away from the first-phase stationary contact and the third-phase stationary contact at the clearance opening; the insulating component of the second-phase stationary contact is an insulating block, and the second-phase stationary contact is connected to the insulating block.

[0012] In one exemplary embodiment of this application, the connection portion between the first stationary contact plate and the second stationary contact plate has a rounded corner structure.

[0013] In one exemplary embodiment of this application, the stationary contact includes a metal component, and the width of the first stationary contact plate ranges from 39 to 45 mm.

[0014] A second aspect of this application provides a switch cabinet, comprising: a cabinet body; and a grounding switch as described in any of the preceding claims disposed inside the cabinet body.

[0015] The grounding switch and switchgear in this application have at least the following beneficial effects: The stationary contact of this application uses a first stationary contact plate and a second stationary contact plate connected perpendicularly to each other. Compared with the existing technology's T-shaped structure for the stationary contact, this design modifies the high-voltage side conductor structure, resulting in a more balanced electric field distribution and better insulation performance. The moving contact includes a first moving blade and a second moving blade arranged opposite to each other. The moving contact can move relative to the stationary contact to achieve closing and opening. When closing, the first and second moving blades can stably clamp the first stationary contact plate of the stationary contact and form a tight contact, ensuring the reliability of the electrical connection between the moving and stationary contacts. Furthermore, due to the improved insulation performance of the stationary contact, under the same insulation requirements as the prior art, the required air insulation distance between the moving and stationary contacts in this application can be shortened, thereby reducing the distance between the moving and stationary contacts, reducing the lever arm of the moving contact, and making the operation of the moving contact more effortless.

[0016] Other features and advantages of this application will become apparent from the following detailed description, or may be learned in part from practice of this application.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0019] Figure 1 A schematic diagram of the grounding switch in some embodiments is shown.

[0020] Figure 2 Schematic diagrams of the contact structure between the moving contact and the stationary contact are shown in some embodiments.

[0021] Figure 3 A schematic diagram of the stationary contact structure is shown in some embodiments.

[0022] Figure 4 A front view structural schematic diagram of the stationary contact in some embodiments is shown.

[0023] Figure 5 A schematic diagram of the moving contact is shown in some embodiments.

[0024] Figure 6 A schematic diagram of the structure of two sets of contact portions in some embodiments is shown.

[0025] Figure 7A schematic diagram of a structure in some embodiments showing a second limiting member disposed between a first moving blade and a second moving blade is shown.

[0026] Explanation of reference numerals in the attached figures: 100. Grounding switch; 110. Stationary contact; 110a. First phase stationary contact; 110b. Second phase stationary contact; 110c. Third phase stationary contact; 111. First stationary contact plate; 112. Second stationary contact plate; 113. Third stationary contact plate; 120. Moving contact; 121. Contact part; 1210. First moving blade; 1211. Second moving blade; 122. Connecting piece; 123. First limiting piece; 1230. Snap ring; 1231. Fixing cap; 124. Elastic element; 125. Second limiting piece; 130. Insulating element; 131. Insulating cover; 1310. Clearance opening; 132. Insulating block. Detailed Implementation

[0027] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0028] In this application, 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.

[0029] In this application, unless otherwise expressly specified and limited, the terms "assembly," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0031] See Figure 1 and Figure 2 As shown in the figure, this application provides a grounding switch 100 that can be applied to a 40.5kV distribution cabinet. The grounding switch 100 may include a stationary contact 110 and a moving contact 120.

[0032] In some embodiments, see Figure 3 As shown, the stationary contact 110 can be an integral bent structure, which is bent to form a first stationary contact plate 111 and a second stationary contact plate 112. The second stationary contact plate 112 is perpendicularly connected to the first stationary contact plate 111. By connecting the first stationary contact plate 111 and the second stationary contact plate 112 perpendicularly, the stationary contact 110 has an L-shaped structure. Compared with the T-shaped structure of the stationary contact 110 in the prior art, it can reduce structural abrupt changes and sharp corners, making the electric field distribution on the surface of the stationary contact 110 more gradual, avoiding excessively high local electric field intensity, so that the electric field distribution of the L-shaped stationary contact 110 is more balanced and the insulation performance is improved.

[0033] In some embodiments, see Figure 3 and Figure 4 As shown, the stationary contact 110 may further include a third stationary contact plate 113. The first stationary contact plate 111 and the third stationary contact plate 113 are positioned opposite each other and spaced apart, and are arranged parallel to each other. A second stationary contact plate 112 is used to connect the first stationary contact plate 111 and the third stationary contact plate 113. The third stationary contact plate 113 and the first stationary contact plate 111 form an integral frame with the second stationary contact plate 112, which enhances the structural rigidity of the stationary contact 110 and prevents the stationary contact plate from deforming under the clamping force of the moving contact 120. The third stationary contact plate 113 is provided with a circular threaded hole, which can be used to connect the third stationary contact plate 113 to the primary main circuit in the switch cabinet through bolts or screws and other fixing structures to ensure current flow.

[0034] It should be noted that the connection points between the first stationary contact plate 111 and the second stationary contact plate 112, as well as the connection points between the second stationary contact plate 112 and the third stationary contact plate 113, are all rounded corner structures. The rounded corner transitions make the electric field distribution of the stationary contact 110 more uniform, reducing the risk of tip discharge and greatly improving the product's insulation performance.

[0035] In some embodiments, the outer surfaces of the first stationary contact plate 111, the second stationary contact plate 112, and the third stationary contact plate 113 are flat, and the connection between the first stationary contact plate 111 and the second stationary contact plate 112, the second stationary contact plate 112, and the third stationary contact plate 113 is an arc surface. That is, adjacent flat surfaces are smoothly transitioned by arc surfaces, which makes the electric field distribution of the stationary contact 110 more uniform, reduces the risk of tip discharge, and greatly improves the insulation performance of the product.

[0036] In some embodiments, the end of the first stationary contact plate 111 furthest from the second stationary contact plate 112 protrudes a certain length relative to the third stationary contact plate 113, meaning the length of the first stationary contact plate 111 is longer than the length of the third stationary contact plate 113. Thus, since the second stationary contact plate 112 is shorter, by designing the third stationary contact plate 113 and the first stationary contact plate 111 with different height dimensions, compared to first stationary contact plates 111 and 113 of the same height dimension, no additional mold is required, making its molding easier. Furthermore, the third stationary contact plate 113 is connected to the primary main circuit within the switch cabinet, and its height is not required; designing a shorter third stationary contact plate 113 can reduce costs.

[0037] In some embodiments, the stationary contact 110 may include a metal component, thereby making the electric field distribution generated by the stationary contact 110 more uniform. For example, the metal component may be a copper busbar, which has the advantages of being readily available, inexpensive, and easy to process.

[0038] In some embodiments, the widths of the first stationary contact plate 111, the second stationary contact plate 112, and the third stationary contact plate 113 may be the same. For example, 39mm, 40mm, 41mm, or 45mm.

[0039] For example, the widths of the first stationary contact plate 111, the second stationary contact plate 112, and the third stationary contact plate 113 can all be 40mm. It is understood that choosing a width of 40mm for the first stationary contact plate 111, the second stationary contact plate 112, and the third stationary contact plate 113 ensures sufficient conductor cross-sectional area, reduces resistance, and increases current carrying capacity to meet the conductivity requirements of the grounding switch 100 under rated current, avoiding overheating damage due to insufficient cross-sectional area. Furthermore, it ensures the structural rigidity of the stationary contact plates themselves, preventing deformation under stress, and avoids conflicts with the installation space of surrounding structures such as the insulating component 130 and the cabinet described below due to excessive width, thus adapting to the overall layout.

[0040] In some embodiments, see Figure 5 and Figure 6 As shown, the moving contact 120 can move toward or away from the stationary contact 110. The moving contact 120 includes at least one set of contact portions 121, and each set of contact portions 121 includes a first moving blade 1210 and a second moving blade 1211 disposed opposite to each other.

[0041] In some embodiments, the first stationary contact plate 111 is disposed on the side of the second stationary contact plate 112 near the moving contact 120. During closing, the moving contact 120 can move towards the stationary contact 110, so that the first stationary contact plate 111 is sandwiched between the first moving blade 1210 and the second moving blade 1211, and the opposite sides of the first stationary contact plate 111 contact the inner sides of the first and second moving blades 1210 and 1211, respectively. During opening, the first and second moving blades 1210 can move away from the stationary contact 110, so that the first and second moving blades 1210 and 1211 separate from the first stationary contact plate 111.

[0042] Understandably, see Figure 2 As shown, when the circuit is closed, the first stationary contact plate 111 is clamped between the first moving blade 1210 and the second moving blade 1211, which can stably clamp the first stationary contact plate 111, so that the first moving blade 1210, the second moving blade 1211 and the first stationary contact plate 111 form a tight contact, ensuring the reliability of the electrical connection between the moving contact 120 and the stationary contact 110.

[0043] Furthermore, since the stationary contact 110 adopts an L-shaped structure, the insulation performance of the stationary contact 110 is improved, which can shorten the required air insulation distance between the moving contact 120 and the stationary contact 110, thereby reducing the distance between the moving contact 120 and the stationary contact 110, reducing the lever arm of the moving contact 120, and making it easier to operate the moving contact 120.

[0044] In some embodiments, the distance between the first moving blade 1210 and the second moving blade 1211 is less than or equal to the width of the first stationary contact plate 111.

[0045] For example, the distance between the first moving blade 1210 and the second moving blade 1211 is 38.5 mm. The width of the first stationary contact plate 111 is 40 mm, meaning the distance between the first moving blade 1210 and the second moving blade 1211 is less than the width of the first stationary contact plate 111. During closing, because the distance between the first moving blade 1210 and the second moving blade 1211 is less than the width of the first stationary contact plate 111, the first moving blade 1210 and the second moving blade 1211 can tightly clamp the first stationary contact plate 111, ensuring a stable electrical contact between the moving contact 120 and the stationary contact 110. This avoids poor contact due to excessive spacing, reduces contact resistance, lowers the risk of overheating caused by contact problems, and ensures the conductivity of the grounding switch 100 under rated current.

[0046] In some embodiments, see Figure 6As shown, the moving contact 120 may further include a connector 122, a first limiting member 123, and an elastic member 124. The connector 122 passes sequentially through the first moving blade 1210 and the second moving blade 1211. At least one end of the connector 122 is provided with the first limiting member 123 and the elastic member 124. The elastic member 124 and the first limiting member 123 are both located on the side of the first moving blade 1210 or the second moving blade 1211 away from the second moving blade 1211 and the first moving blade 1210, that is, the first limiting member 123 and the elastic member 124 are located on the outside of the first moving blade 1210 or the second moving blade 1211. The second poles at opposite ends of the elastic member 124 are between the first limiting member 123 and the first moving blade 1210 and the second moving blade 1211 and undergo compressive deformation to apply a force toward the first moving blade 1210 or the second moving blade 1211.

[0047] For example, see Figure 6 As shown, a first limiting member 123 and an elastic member 124 are provided at both opposite ends of the connector 122. That is, a first limiting member 123 and an elastic member 124 are provided on the outer side of the first moving blade 1210 and the outer side of the second moving blade 1211. The elastic members 124 on both sides can apply forces toward each other to the first moving blade 1210 and the second moving blade 1211 respectively, so as to adjust the distance between the first moving blade 1210 and the second moving blade 1211 to match the first stationary contact plate 111, so as to ensure a tight connection between the first moving blade 1210, the second moving blade 1211 and the first stationary contact plate 111.

[0048] It is understandable that the elastic element 124 generates a continuous opposing force through the compression deformation between the first limiting element 123 and the first moving blade 1210 or the second moving blade 1211. This force works in conjunction with the width setting of the first stationary contact plate 111 to ensure a stable clamping between the first moving blade 1210 and the second moving blade 1211 and the first stationary contact plate 111, thereby reducing contact resistance and heat generation. Furthermore, the deformation of the elastic element 124 compensates for the dimensional tolerance between the distance between the first moving blade 1210 and the second moving blade 1211 and the first stationary contact plate 111, achieving uniform contact pressure. The connecting element 122 and the first limiting element 123 ensure the stability of the structural assembly, making closing smooth and opening reliable. Overall, this improves the electrical contact reliability and mechanical operation stability of the moving contact 120.

[0049] Furthermore, the connector 122 can be a columnar structure such as a screw. The first moving blade 1210 and the second moving blade 1211 have through holes for the connector 122 to pass through. The size of the through holes is larger than the size of the connector 122, so that the connector 122 can pass through the first moving blade 1210 and the second moving blade 1211 sequentially. The elastic element 124 can be a stacked spring. The size of the stacked spring is larger than the size of the through holes to ensure that the stacked spring can generate elastic deformation between the first limiting member 123 and the first moving blade 1210 and the second moving blade 1211.

[0050] In some embodiments, see Figure 6 As shown, the first limiting member 123 includes a retaining ring 1230 and a fixing cap 1231. The fixing cap 1231 contacts the end of the elastic member 124 away from the first moving blade 1210 or the second moving blade 1211, thereby increasing the contact area between the elastic member 124 and the fixing cap 1231. The retaining ring 1230 is fixedly connected to the connecting member 122, and the fixing cap 1231 is located on the side away from the elastic member 124.

[0051] The fixed cap 1231 increases the contact area with the elastic element 124, allowing the elastic force to be transmitted evenly to balance the clamping force of the first moving blade 1210 and the second moving blade 1211. The retaining ring 1230 prevents movement by fixing the connecting piece 122 and limiting the fixed cap 1231. The two work together to ensure the stable transmission of the elastic preload, avoiding uneven deformation or detachment of the elastic element 124. This not only improves the reliability of the contact between the moving contact 120 and the stationary contact plate, but also reduces component wear to extend service life and enhances the overall structural stability.

[0052] In some embodiments, see Figure 6 and Figure 7 As shown, the moving contact 120 may further include a second limiting member 125. The second limiting member 125 is sleeved on the connecting member 122 and located between the first moving blade 1210 and the second moving blade 1211. The size of the second limiting member 125 is larger than the size of the through hole on the moving blade. The second limiting member 125, sleeved on the connecting member 122 and located between the two moving blades, can limit the minimum distance between the first moving blade 1210 and the second moving blade 1211 through physical blocking. This avoids excessive compression of the elastic member 124, which would cause the distance between the two moving blades to be too small, ensuring that the stationary contact plate can be smoothly inserted between the moving blades when closing, preventing jamming caused by the narrow distance. It also provides stable intermediate support for the two moving blades when the elastic member 124 applies clamping force, preventing the moving blades from shifting or deforming due to force, ensuring uniform distribution of clamping force. At the same time, it works with the first limiting member 123 to limit the axial displacement range of the moving blades, further improving the rigidity and operational stability of the overall structure of the moving contact 120, and ensuring continuous and reliable electrical contact.

[0053] In some embodiments, see Figure 6 As shown, the moving contact 120 may include two sets of contact portions 121, which may be arranged sequentially in the moving direction of the moving contact 120, and the two sets of contact portions 121 have the same shape and structure. Each set of contact portions 121 includes a first moving blade 1210 and a second moving blade 1211 disposed opposite to each other, and each set of contact portions 121 has an elastic member 124 and a first limiting member 123 on the outer side of the first moving blade 1210 and the second moving blade 1211, and a second limiting member 125 on the inner side. With two sets of contact portions 121, the moving contact 120 can sequentially contact the stationary contact 110 in the direction of movement, which can distribute the current load, reduce the current-carrying pressure of a single set of contact portions 121, and reduce local heating. The identical structural design ensures that the two sets of contact portions 121 are subjected to uniform force. With the pre-tightening force of their respective elastic elements 124 and the spacing limitation of the second limiting element 125, a symmetrical and stable clamping force can be formed, avoiding force deviation caused by a single set of contact. At the same time, the redundant design of the two sets of contact portions 121 can maintain reliable electrical contact through the other set when one set of contact portions 121 experiences slight wear or elastic decay, improving the overall durability and operational redundancy of the moving contact 120. In addition, the two independent limiting structures can ensure consistent insertion accuracy when closing the circuit, ensuring operational stability.

[0054] In some embodiments, see Figure 1 and Figure 2 As shown, the grounding switch 100 may also include an insulating component 130 connected to the stationary contact 110. By directly connecting to the stationary contact 110, the stationary contact 110 can be electrically isolated from other metal parts of the grounding switch 100, blocking unnecessary conductive paths, preventing short circuits or leakage between the stationary contact 110 and surrounding metal parts, and ensuring the insulation safety of the grounding switch 100.

[0055] In some embodiments, see Figure 1 As shown, the grounding switch 100 includes a first phase stationary contact 110a, a second phase stationary contact 110b, and a third phase stationary contact 110c, with the second phase stationary contact 110b located between the first phase stationary contact 110a and the third phase stationary contact 110c.

[0056] In some embodiments, see Figure 1 As shown, the insulating member 130 can be an insulating cover 131. The insulating cover 131 has a covering cavity for accommodating the first phase stationary contact 110a and the third phase stationary contact 110c. The first phase stationary contact 110a and the third phase stationary contact 110c are fixedly connected to the insulating cover 131 through a connecting structure and a fixing member, so that the first phase stationary contact 110a and the third phase stationary contact 110c are disposed in the covering cavity.

[0057] The insulating cover 131, by providing a covering cavity to accommodate the first-phase stationary contact 110a and the third-phase stationary contact 110c, can form a closed insulating protective space. It can physically isolate the stationary contact 110 between the two phases from the metal partitions, side plates and other components in the switchgear, reduce the electric field coupling between the high-voltage stationary contact 110 and the surrounding metal parts, reduce the risk of local electric field distortion, and improve the insulation withstand capability.

[0058] In some embodiments, see Figure 1 As shown, the insulating cover 131 is provided with a clearance opening 1310 for the moving contact 120 to move. The mating width of the first moving blade 1210 and the second moving blade 1211 is smaller than the width of the clearance opening 1310, so that the moving contact 120 can smoothly move towards or away from the first phase stationary contact 110a and the third phase stationary contact 110c through the clearance opening 1310.

[0059] In some embodiments, see Figure 1 As shown, the insulating element 130 can also be an insulating block 132. The insulating block 132 is located on the second phase stationary contact 110b, which can electrically isolate the stationary contact 110 from other metal parts of the grounding switch 100.

[0060] It should be noted that the aforementioned insulating cover 131 and insulating block 132 not only achieve insulation but also provide stable mechanical support for the stationary contact 110, fixing its spatial position and ensuring smoother engagement between the stationary contact 110 and the moving contact 120. Furthermore, the inherent properties of the insulating material reduce electric field coupling between the stationary contact 110 and surrounding components, helping to optimize the electric field distribution and further improving the overall insulation reliability of the grounding switch 100.

[0061] This application also provides a switch cabinet, which may include a cabinet body and a grounding switch 100 disposed in the cabinet body. The grounding switch 100 may include any of the structural features described above, which will not be described in detail here, but can be referred to the above description for details.

[0062] In the description of this specification, references to terms such as "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application. Therefore, any changes or modifications made in accordance with the claims and description of this application should fall within the scope of this patent application.

Claims

1. A grounding switch, characterized in that, include: The stationary contact includes a first stationary contact plate and a second stationary contact plate that are perpendicularly connected to each other. The moving contact includes a first moving blade and a second moving blade that are arranged opposite to each other; The first stationary contact plate is located on the side of the second stationary contact plate near the moving contact. When the circuit is closed, the moving contact can move towards the side closer to the stationary contact, so that the first stationary contact plate is sandwiched between the first moving blade and the second moving blade and contacts the first moving blade and the second moving blade. When the circuit is opened, the first moving blade and the second moving blade can move away from the stationary contact, so that the first moving blade and the second moving blade are separated from the first stationary contact plate.

2. The grounding switch according to claim 1, characterized in that, The distance between the first moving blade and the second moving blade is less than or equal to the width of the first stationary contact plate.

3. The grounding switch according to claim 2, characterized in that, The moving contact also includes a connector, a first limiting member, and an elastic member. The connector passes through the first moving blade and the second moving blade in sequence. At least one end of the connector is fitted with the first limiting member and the elastic member. The elastic member and the first limiting member are both located on the side of the first moving blade or the second moving blade away from the second moving blade or the first moving blade. The two opposite ends of the elastic member abut against the first limiting member and the first moving blade or the second moving blade and undergo compression deformation to apply a force toward the first moving blade or the second moving blade.

4. The grounding switch according to claim 3, characterized in that, The moving contact also includes a second limiting member, which is sleeved on the connector and located between the first moving blade and the second moving blade to limit the distance between the first moving blade and the second moving blade.

5. The grounding switch according to claim 3, characterized in that, The first limiting member includes a retaining ring and a fixing cap. The fixing cap contacts the end of the elastic member away from the first moving blade or the second moving blade. The retaining ring is fixedly connected to the connecting member and is located on the side of the fixing cap away from the elastic member.

6. The grounding switch according to claim 1, characterized in that, The grounding switch also includes an insulating component connected to the stationary contact.

7. The grounding switch according to claim 6, characterized in that, The grounding switch includes a first phase stationary contact, a second phase stationary contact, and a third phase stationary contact, with the second phase stationary contact located between the first phase stationary contact and the third phase stationary contact; The insulating components of the first phase stationary contact and the third phase stationary contact are insulating covers with protective plates. The insulating cover has a covering cavity for accommodating the first phase stationary contact and the third phase stationary contact. The insulating cover has a clearance opening for the moving contact to move. The first moving blade and the second moving blade can move towards or away from the first phase stationary contact and the third phase stationary contact at the clearance opening. The insulating component of the second phase stationary contact is an insulating block, and the second phase stationary contact is connected to the insulating block.

8. The grounding switch according to claim 1, characterized in that, The connection between the first stationary contact plate and the second stationary contact plate has a rounded corner structure.

9. The grounding switch according to claim 1, characterized in that, The stationary contact includes a metal component, and the width of the first stationary contact plate ranges from 39 to 45 mm.

10. A switch cabinet, characterized in that, include: Cabinet; and cabinet located inside the cabinet. The grounding switch according to any one of claims 1 to 9.

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