gas holder

Abstract

The application relates to the technical field of gas-insulated box, in particular to a gas-filled cabinet. The gas-filled cabinet comprises a box body, a circuit breaker, a phase switch, a connecting assembly and a first supporting assembly. The connecting assembly is located between a pole and a static contact and is connected with the pole and the static contact at the same time. The connecting assembly is arranged in one-to-one correspondence with the static contact. The first supporting assembly is connected with the box body and is configured to support the connecting assembly. The first supporting assembly and the connecting assembly jointly support the contact contact, which is beneficial to improving the structural strength of the contact contact and beneficial to making three groups of switch assemblies have the same insulation performance, thereby guaranteeing the stability of the working process of the phase switch and improving the reliability of power supply. Meanwhile, the three-phase connecting assemblies have the same structure, which is beneficial to guaranteeing that the electric field distribution of the three phases is uniform. The connecting assembly can increase the layout distance of the live body from the ground, so that the insulation performance is improved.

Description

Technical Field

[0001] This application relates to the field of gas insulation box technology, and in particular to gas-filled switchgear. Background Technology

[0002] As users increasingly demand miniaturization, modularization, and reliability of switchgear, more and more gas-insulated switchgear products are entering the market.

[0003] Gas-insulated switchgear is a complete series of devices derived from the combination of high-voltage AC gas-insulated metal-enclosed switchgear technology and conventional switchgear technology. Gas-insulated switchgear includes circuit breakers and phase switches, housing the high-voltage electrical components such as circuit breakers and phase switches within a sealed enclosure filled with a gaseous insulating medium at a pressure slightly higher than atmospheric pressure. This allows for reliable operation under harsh conditions and significantly reduces the overall size and floor space required for switchgear.

[0004] However, when the gas-insulated switchgear circuit breaker and phase switch are connected, the stationary contact of the phase switch is connected to the pole of the circuit breaker through a connector, and the connector has low structural strength, resulting in poor stability of the stationary contact. Utility Model Content

[0005] Therefore, it is necessary to provide a gas-filled switchgear to address the problem of poor stability of the stationary contact caused by the low structural strength of the connector.

[0006] An air-filled cabinet, comprising:

[0007] Box;

[0008] The circuit breaker, located in the enclosure, includes poles;

[0009] The phase switch is located in the housing. The phase switch includes three sets of switching assemblies, and each switching assembly includes a stationary contact.

[0010] Connection components connect the pole and the stationary contact; each connection component is configured to correspond one-to-one with the stationary contact.

[0011] The first support component is connected to the housing and supports the stationary contact via a connecting component.

[0012] This gas-insulated switchgear connects the stationary contacts and poles via connecting components, achieving an integrated design of the circuit breaker and phase switches. The compact arrangement of the circuit breaker and phase switches saves space and facilitates installation. The first support component and the connecting components jointly support the stationary contacts, improving their stability, ensuring smooth operation of the moving contacts of the three switch assemblies, and ensuring that all three switch assemblies have identical insulation properties. This, in turn, guarantees the stability of the phase switch operation and improves power supply reliability. Simultaneously, the identical structure of the three-phase connecting components helps ensure a uniform electric field distribution across the three phases. The connecting components also increase the insulation distance of the live parts from the ground, thereby improving insulation performance.

[0013] In one embodiment, the connection component includes:

[0014] A first connector is disposed between the pole post and the stationary contact, and is connected to both the pole post and the stationary contact; and

[0015] The second connector is connected to the first connector and the first support assembly.

[0016] The connecting assembly connects the pole post, the stationary contact, and the first support assembly via a first connector and a second connector, achieving both connection and support functions.

[0017] In one embodiment, the first connector includes:

[0018] The first connecting plate has one side connected to the pole post;

[0019] The second connecting plate is connected at one end to the first connecting plate; and

[0020] The third connecting plate is connected to the other end of the second connecting plate, and the side of the third connecting plate facing away from the first connecting plate is connected to the stationary contact.

[0021] The first connecting plate connects to the pole post via its surface, while the third connecting plate connects to the stationary contact via its surface. This increased contact area enhances connection stability and prevents circuit breaks. Furthermore, this first connecting structure allows for the connection of pole posts and stationary contacts that are relatively far apart, improving the flexibility of circuit breaker and three-phase switch placement.

[0022] In one embodiment, the first connecting plate and the third connecting plate are arranged in parallel and spaced apart, and the first connecting plate, the second connecting plate and the third connecting plate are connected in a U-shaped structure.

[0023] The U-shaped first connector enables the connection between the pole post and the stationary contact, raising the height of the stationary contact. At the same time, when the first connector is U-shaped, the structural stability of the first and third connecting plates is high, which helps to ensure the stability of the connection between the first connecting plate and the pole post, and between the third connecting plate and the stationary contact.

[0024] In one embodiment, the second connector includes:

[0025] The fourth connecting plate is connected to the first connecting plate;

[0026] The fifth connecting plate is connected at one end to the fourth connecting plate; and

[0027] The sixth connecting plate is connected to the other end of the fifth connecting plate.

[0028] The second connector connects to the first connector via a fourth connector, allowing both the fourth and first connectors to jointly support the stationary contact, thus improving structural stability. Furthermore, this second connector structure allows for flexible positioning of the first support assembly and the first connector, enabling the operator to selectively adjust the position of the first support assembly based on available space and location within the housing.

[0029] In one embodiment, the second connector has a Z-shaped structure, and the fourth connecting plate is in surface contact with the surface of the first connecting plate facing the stationary contact, or the fourth connecting plate is in surface contact with the surface of the first connecting plate away from the stationary contact.

[0030] This design increases the contact area between the fourth connecting plate and the first connecting plate, improving connection stability. Simultaneously, when the fourth connecting plate and the first connecting plate are in surface-to-surface contact away from the stationary contact, the fourth connecting plate supports the first connecting plate, enhancing the stability of the second and first connecting members jointly supporting the stationary contact. This ensures that all three sets of switch assemblies have identical insulation performance, thereby guaranteeing the stability of the phase switch operation and improving power supply reliability. Furthermore, the identical structure of the three-phase connection assemblies helps ensure a uniform electric field distribution across the three phases. The connection assemblies also increase the insulation distance of charged components from ground, further improving insulation performance.

[0031] In one embodiment, the first support component includes:

[0032] Three first insulating connectors are connected to the connecting components one by one;

[0033] The first support member is connected to all three first insulating connectors, and the first support member is also connected to the housing.

[0034] The first insulating connector is used to disconnect the electrical connection between the connecting assembly and the first support member, which helps ensure the safety performance of the gas-insulated switchgear. The first support member also supports the first insulating connectors corresponding to the three sets of switch assemblies, which helps ensure the high consistency of the three sets of switch assemblies.

[0035] In one embodiment, the first support member includes:

[0036] A first insulating support plate is connected to each first insulating connector, and the first insulating support plate is configured to support the first insulating connector; and

[0037] The first fixed support plate is configured to connect the housing and the first insulating support plate.

[0038] The first insulating support plate supports the three first insulating connectors, which helps ensure the high consistency of the three sets of switch assemblies. The first insulating support plate is made of insulating material, which utilizes the insulating properties of the material itself to further block the discharge path, thereby improving safety and stability.

[0039] In one embodiment, the first fixed support plate is provided with a waist-shaped hole, and the first fixed support plate and the first insulating support plate are connected by a fastener passing through the waist-shaped hole.

[0040] The waist-shaped hole structure allows the first insulating support plate to move in the extension direction of the waist-shaped hole, which helps to ensure installation accuracy.

[0041] In one embodiment, the switch assembly includes a contact, and the gas-insulated cabinet further includes:

[0042] The second support assembly is connected to the housing and is configured to support three contact points.

[0043] The second support component helps ensure the consistency of the height of the three contact points and improves the coaxiality of the contact points and stationary contacts of the three sets of switching components. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the structure of the gas-filled cabinet provided in one embodiment of this application. Figure 1 .

[0045] Figure 2 This is a schematic diagram of the structure of the gas-filled cabinet provided in one embodiment of this application. Figure 2 .

[0046] Figure 3 for Figure 1 A magnified view of a portion of point A in the middle.

[0047] Figure 4 This is a schematic diagram of the structure of the first connector provided in one embodiment of this application.

[0048] Figure 5 This is a schematic diagram of the structure of the second connector provided in one embodiment of this application.

[0049] Figure 6 This is a schematic diagram of the structure of the first insulating connector provided in one embodiment of this application.

[0050] Figure 7 This is a schematic diagram of the structure of the first insulating support plate provided in one embodiment of this application.

[0051] Figure 8 This is a schematic diagram of the structure of the first fixed support plate provided in one embodiment of this application.

[0052] Figure 9 for Figure 1 A magnified view of a section at point B in the middle.

[0053] Explanation of reference numerals in the attached figures:

[0054] 100. Box body;

[0055] 200. Circuit breaker; 210. Pole post;

[0056] 300. Phase switch; 310. Switch assembly; 311. Stationary contact; 312. Contact contact; 313. Mounting bracket; 314. Insulating rod; 315. Moving contact; 316. Grounding contact;

[0057] 400. Connecting component; 410. First connector; 411. First connecting plate; 412. Second connecting plate; 413. Third connecting plate; 420. Second connector; 421. Fourth connecting plate; 422. Fifth connecting plate; 423. Sixth connecting plate;

[0058] 500, First support assembly; 510, First insulating connector; 520, First support member; 521, First insulating support plate; 5211, Countersunk hole; 522, First fixed support plate; 5221, Waist-shaped hole;

[0059] 600. Second support assembly; 610. Second insulating support; 620. Second support; 621. Second insulating support plate; 622. Second fixed support plate. Detailed Implementation

[0060] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0061] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying 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, and therefore should not be construed as a limitation of this application.

[0062] Furthermore, where the terms "first" and "second" appear, these terms are 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 with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," 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, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0064] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0066] See Figures 1 to 2 , Figure 1 A schematic diagram of the gas-insulated switchgear structure provided in one embodiment of this application is shown. Figure 1 . Figure 2 A schematic diagram of the gas-insulated switchgear structure provided in one embodiment of this application is shown. Figure 2 .

[0067] This embodiment provides a gas-filled switchgear, which includes a housing 100, a circuit breaker 200, and a phase switch 300. The circuit breaker 200 and the phase switch 300 are located within the housing 100, and the circuit breaker 200 includes a pole 210. More specifically, the housing 100 is a stainless steel gas box. The circuit breaker 200 is located at the bottom of the housing 100, and the phase switch 300 is disposed above the circuit breaker 200.

[0068] Specifically, the phase switch 300 can be a three-position switch. A three-position switch achieves efficient and safe power switching and transition by synchronously controlling the three-phase circuit, making it particularly suitable for three-phase AC systems. The three-position switch eliminates the risk of three-phase imbalance through synchronous control, its integrated design improves space and cost-effectiveness, and multiple protections ensure operational safety. Ultimately, it achieves efficient and reliable operation of the power system from on / off control to state transition, making it a key device in medium- and high-voltage power distribution networks.

[0069] The three-position switch includes three sets of switch assemblies 310, which are arranged in parallel and spaced apart. Each set of switch assemblies 310 includes a mounting bracket 313, an insulating rod 314, a moving contact 315, a stationary contact 311, a contact contact 312, and a grounding contact 316. The grounding contact 316 is mounted on the mounting bracket 313, and the insulating rod 314 passes through the grounding contact 316 and is connected to the mounting bracket 313. The stationary contact 311 is mounted on the insulating rod 314. The contact contact 312 is coaxial with the stationary contact 311 and spaced apart. The grounding contact 316, stationary contact 311, and contact contact 312 are arranged coaxially in sequence in a direction away from the mounting bracket 313. During operation, the moving contact 315 reciprocates between the contact contact 312 and the grounding contact 316 along its axis. When the moving contact 315 contacts the contact contact 312, the circuit is in the ON position, and the circuit operates normally. When the moving contact 315 comes into contact with the grounding contact 316, the line is in a grounding protection state.

[0070] The enclosure 100 is filled with SF6 gas, creating an insulating environment inside the enclosure 100. The contacts are surrounded by insulating gas, and the phase-to-phase and phase-to-ground insulation is jointly guaranteed by the gas and supporting insulators, which can withstand the rated voltage and short-time overvoltage.

[0071] like Figure 1 and Figure 3 As shown, the gas-insulated switchgear also includes a connecting assembly 400. The connecting assembly 400 connects the pole 210 and the stationary contact 311. This gas-insulated switchgear, through the connecting assembly 400 connecting the stationary contact 311 and the pole 210, achieves an integrated design of the circuit breaker 200 and the phase switch 300. The circuit breaker 200 and the phase switch 300 are arranged compactly, which helps save space and facilitates installation.

[0072] The gas-insulated switchgear also includes a first support assembly 500. The first support assembly 500 is connected to the housing 100 and supports the stationary contact 311 via a connecting assembly 400. The first support assembly 500 and the connecting assembly 400 jointly support the stationary contact 311, which improves the stability of the stationary contact 311, ensures smooth operation of the moving contacts 315 of the three sets of switch assemblies, and ensures that the three sets of switch assemblies 310 have the same insulation performance. This, in turn, ensures the stability of the phase switch 300 during operation and improves the reliability of power supply. Simultaneously, the identical structure of the three-phase connecting assemblies 400 helps ensure a uniform electric field distribution across the three phases. The connecting assembly 400 also increases the insulation distance of the charged components from the ground, thereby improving insulation performance.

[0073] Please continue reading Figure 1 and Figure 3In one embodiment, the connecting assembly 400 includes a first connector 410 and a second connector 420. The first connector 410 is disposed between the pole post 210 and the stationary contact 311, and is connected to both the pole post 210 and the stationary contact 311. The second connector 420 is connected to both the first connector 410 and the first support assembly 500. The connecting assembly 400 connects the pole post 210, the stationary contact 311, and the first support assembly 500 via the first connector 410 and the second connector 420, achieving both connection and support functions.

[0074] like Figure 3 and Figure 4 As shown, the first connecting member 410 includes a first connecting plate 411, a second connecting plate 412, and a third connecting plate 413. One side of the first connecting plate 411 is connected to the pole post 210, one end of the second connecting plate 412 is connected to the first connecting plate 411, and the other end of the third connecting plate 413 is connected to the second connecting plate 412. The side of the third connecting plate 413 facing away from the first connecting plate 411 is connected to the stationary contact 311. The first connecting plate 411 is connected to the pole post 210 via its surface, and the third connecting plate 413 is connected to the stationary contact 311 via its surface. By increasing the contact area, the stability of the connection is increased, preventing situations such as circuit breaks. Furthermore, this structure of the first connecting member 410 can connect the relatively distant pole post 210 and the stationary contact 311, which is beneficial for improving the flexibility of the circuit breaker 200 and the three-position switch's placement.

[0075] For example, the end of the pole post 210 can be positioned opposite and spaced apart from the stationary contact 311 to facilitate connection. In other embodiments, the end of the pole post 210 can be angled relative to the stationary contact 311, and connection can be achieved using the first connector 410.

[0076] Furthermore, the first connecting plate 411 and the third connecting plate 413 are arranged parallel and spaced apart, and the first connecting plate 411, the second connecting plate 412, and the third connecting plate 413 are connected in a U-shaped structure. At this time, the end of the pole post 210 can be opposite to and spaced apart from the stationary contact 311. The U-shaped first connecting member 410 can realize the connection between the pole post 210 and the stationary contact 311, raising the height of the stationary contact 311. At the same time, when the first connecting member 410 is U-shaped, the structural stability of the first connecting plate 411 and the third connecting plate 413 is high, which is conducive to ensuring the stability of the connection between the first connecting plate 411 and the pole post 210, and between the third connecting plate 413 and the stationary contact 311.

[0077] like Figure 3 and Figure 5As shown, the second connecting member 420 includes a fourth connecting plate 421, a fifth connecting plate 422, and a sixth connecting plate 423. The fourth connecting plate 421 is connected to the first connecting plate 411, one end of the fifth connecting plate 422 is connected to the fourth connecting plate 421, and the other end of the sixth connecting plate 423 is connected to the fifth connecting plate 422. The second connecting member 420 is connected to the first connecting plate 411 through the fourth connecting plate 421, so that the fourth connecting plate 421 and the first connecting plate 411 jointly support the stationary contact 311, which helps to improve structural stability. At the same time, this structure of the second connecting member 420 allows for flexible setting of the positional relationship between the first support assembly 500 and the first connecting member 410. The operator can selectively set the position of the first support assembly 500 according to the space and position within the housing 100.

[0078] The second connector 420 has a Z-shaped structure. The fourth connector 421 is in surface contact with the first connector 411 facing the stationary contact 311, or the fourth connector 421 is in surface contact with the first connector 411 away from the stationary contact 311, thereby increasing the contact area between the fourth connector 421 and the first connector 411 and improving the stability of the connection. When the fourth connector 421 is in surface contact with the first connector 411 away from the stationary contact 311, the fourth connector 421 supports the first connector 411, which helps improve the stability of the second connector 420 and the first connector 410 jointly supporting the stationary contact 311. This also helps ensure that the three sets of switch assemblies 310 have the same insulation performance, thereby ensuring the stability of the phase switch 300 during operation and improving the reliability of power supply. At the same time, the three-phase connection assemblies 400 have the same structure, which helps ensure the uniform distribution of the electric field in the three phases. The connection assemblies 400 can increase the insulation distance of the charged body from the ground, thereby improving the insulation performance.

[0079] More specifically, one side or open end of the U-shaped first connector 410 faces the fourth connecting plate 421 so that the fourth connecting plate 421 can be supported below the first connecting plate 411.

[0080] The first connector 410 and the second connector 420 are made of conductive materials to ensure conductivity. Furthermore, the first connector 410 and the second connector 420 are copper busbars, which have high conductivity and low contact resistance.

[0081] like Figure 1 and Figure 3As shown, the first support assembly 500 includes a first support member 520 and three first insulating connectors 510. Each first insulating connector 510 is connected to a connecting assembly 400 in a one-to-one correspondence. The first support member 520 is connected to all three first insulating connectors 510, and the first support member 520 is also connected to the housing 100. The first insulating connectors 510 are used to disconnect the electrical connection between the connecting assembly 400 and the first support member 520, which helps ensure the safety performance of the gas-insulated switchgear. The first support member 520 simultaneously supports the first insulating connectors 510 corresponding to the three sets of switch assemblies 310, which helps ensure the high consistency of the three sets of switch assemblies 310.

[0082] More specifically, such as Figure 3 and Figure 6 As shown, the first insulating connector 510 is a supporting insulator, which is used to isolate the live conductor from the metal housing 100.

[0083] like Figure 3 , Figure 7 and Figure 8 As shown, the first support member 520 includes a first insulating support plate 521 and a first fixed support plate 522. The first insulating support plate 521 is connected to each of the first insulating connectors 510, and the first insulating support plate 521 is configured to support the first insulating connectors 510. The first fixed support plate 522 is configured to connect the housing 100 and the first insulating support plate 521. The first insulating support plate 521 is used to support the three first insulating connectors 510, which helps to ensure the height consistency of the three sets of switch assemblies 310. The first insulating support plate 521 is made of insulating material, and the insulating properties of the material itself are used to further block the discharge path, thereby improving safety and stability.

[0084] Optionally, such as Figure 3 and Figure 7 As shown, the first insulating support plate 521 is provided with a countersunk hole 5211. The first insulating connector 510 is connected to the first insulating support plate 521 through the countersunk hole 5211. This facilitates the circumferential positioning of the first insulating connector 510 in the countersunk hole 5211, thereby further improving the consistency of the three sets of switch assemblies 310 and improving the consistency of the electric field.

[0085] The first insulating support plate 521 is made of insulating material to ensure insulation performance and thus improve safety.

[0086] The first fixed support plate 522 is a connecting structure used to connect the first insulating support plate 521 and the housing 100.

[0087] The first fixed support plate 522 is made of stainless steel to improve the strength of the support structure. Parts of the first fixed support plate 522 are welded and fixed to the housing 100, thereby improving the structural stability of the first fixed support plate 522.

[0088] In one embodiment, such as Figure 3 and Figure 8 As shown, the first fixed support plate 522 is provided with an oblong hole 5221. The first fixed support plate 522 and the first insulating support plate 521 are connected by a fastener passing through the oblong hole 5221. The oblong hole 5221 structure allows the first insulating support plate 521 to have room to move in the extension direction of the oblong hole 5221, which helps to ensure installation accuracy.

[0089] Specifically, in order to improve the support effect of the first support assembly 500, the first insulating support plate 521 and the first insulating connector 510 are arranged in a vertical direction so that they can support from below the second connector 420.

[0090] like Figure 1 and Figure 9 As shown, the gas-filled cabinet also includes a second support component 600, which is connected to the housing 100. The second support component 600 is configured to support three contact contacts 312, thereby ensuring the consistency of the height of the three contact contacts 312 and improving the coaxiality of the contact contacts 312 and stationary contacts 311 of the three sets of switch components 310.

[0091] Specifically, the structure of the second support assembly 600 is the same as that of the first support assembly 500. The second support assembly 600 includes a second insulating support member 610 and a second support member 620. One end of the second insulating support member 610 is connected to the contact contact 312, and the other end of the second support member 620 is connected to the second insulating support member 610. The second support assembly 600 is arranged laterally, such that the first insulating connector 510 of the second support assembly 600 is perpendicular to the end face of the contact contact 312.

[0092] The second support member 620 includes a second insulating support plate 621 and a second fixed support plate 622. The second fixed support plate 622 is welded and fixed to the housing 100. The second fixed support plate 622 is disposed on the housing 100 and supports three second insulating support members 610.

[0093] The second insulating support plate 621 is made of insulating material to ensure insulation performance and thus improve safety. The second fixed support plate 622 is made of stainless steel to improve the strength of the support structure.

[0094] The gas-insulated switchgear's structural layout makes reasonable use of the internal space of the enclosure 100, solving the installation problem of the integrated structure of the circuit breaker 200 and phase switch 300. The high strength of the connecting assembly 400, the first support assembly 500, and the second support assembly 600 helps ensure the coaxiality of the three sets of switch assemblies, thereby ensuring smooth operation of the moving contacts 315 of the three sets of switch assemblies. This benefits the electrical performance of the gas-insulated switchgear, improves the reliability of the entire system, and ensures the personal safety of operators. The phase switch 300 has a uniform electric field distribution, and its reasonable installation arrangement optimizes the electric field distribution within the enclosure 100, improving insulation margin and allowing for easy passage of insulation tests, greatly enhancing the long-term reliability of the switchgear.

[0095] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.

[0096] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An inflatable cabinet, characterized in that, include: Box (100); A circuit breaker (200) is located in the housing (100), and the circuit breaker (200) includes a pole (210). A phase switch (300) is located in the housing (100). The phase switch (300) includes three sets of switch assemblies (310), and each switch assembly (310) includes a stationary contact (311). A connecting component (400) connects the pole post (210) and the stationary contact (311), and the connecting component (400) and the stationary contact (311) are configured in a one-to-one correspondence; as well as A first support component (500) is connected to the housing (100), and the first support component (500) supports the stationary contact (311) through the connecting component (400).

2. The gas-filled cabinet according to claim 1, characterized in that, The connection component (400) includes: A first connector (410) is disposed between the pole post (210) and the stationary contact (311) and is connected to the pole post (210) and the stationary contact (311); and The second connector (420) is connected to the first connector (410) and the first support assembly (500).

3. The gas-filled cabinet according to claim 2, characterized in that, The first connector (410) includes: A first connecting plate (411) is connected to the pole post (210) on one side. The second connecting plate (412) is connected at one end to the first connecting plate (411); and The third connecting plate (413) is connected to the other end of the second connecting plate (412), and the side of the third connecting plate (413) facing away from the first connecting plate (411) is connected to the stationary contact (311).

4. The gas-filled cabinet according to claim 3, characterized in that, The first connecting plate (411) and the third connecting plate (413) are arranged in parallel and spaced apart, and the first connecting plate (411), the second connecting plate (412) and the third connecting plate (413) are connected in a U-shaped structure.

5. The gas-filled cabinet according to claim 3, characterized in that, The second connector (420) includes: The fourth connecting plate (421) is connected to the first connecting plate (411); The fifth connecting plate (422) is connected at one end to the fourth connecting plate (421); and The sixth connecting plate (423) is connected to the other end of the fifth connecting plate (422).

6. The gas-filled cabinet according to claim 5, characterized in that, The second connector (420) has a Z-shaped structure. The fourth connector (421) is in contact with the surface of the first connector (411) facing the stationary contact (311), or the fourth connector (421) is in contact with the surface of the first connector (411) away from the stationary contact (311).

7. The gas-filled cabinet according to claim 1, characterized in that, The first support component (500) includes: Three first insulating connectors (510) are connected one-to-one with the connecting assembly (400); The first support member (520) is connected to all three first insulating connectors (510), and the first support member (520) is connected to the housing (100).

8. The gas-filled cabinet according to claim 7, characterized in that, The first support member (520) includes: A first insulating support plate (521) is connected to each of the first insulating connectors (510), and the first insulating support plate (521) is configured to support the first insulating connector (510); and A first fixed support plate (522) is configured to connect the housing (100) and the first insulating support plate (521).

9. The gas-filled cabinet according to claim 8, characterized in that, The first fixed support plate (522) is provided with a waist-shaped hole (5221), and the first fixed support plate (522) and the first insulating support plate (521) are connected by a fastener passing through the waist-shaped hole (5221).

10. The gas-filled cabinet according to any one of claims 1-9, characterized in that, Each of the switch assemblies (310) includes a contact (312), and the gas-filled cabinet also includes: A second support assembly (600) is connected to the housing (100) and is configured to support the three contact contacts (312).

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