Switching device

Abstract

The utility model relates to a switching device. The switch equipment comprises an inflation box which is provided with an inflation cavity which is used for arranging insulating gas; the first switch is arranged in the inflation cavity; the second switch is arranged in the inflation cavity and electrically connected with the first switch; the first copper bar is arranged in the inflation cavity and is electrically connected with the first switch; and the second copper bar is arranged in the inflation cavity and is electrically connected with the second switch. Therefore, according to the switch equipment provided by the invention, the size of the switch equipment can be reduced.

Description

Technical Field

[0001] This application relates to the field of electrical switchgear technology, and in particular to switchgear. Background Technology

[0002] Traditional fossil fuels such as coal and oil cause significant environmental damage during power generation and are non-renewable. Wind energy, as a renewable and clean energy source, is receiving increasing attention. Offshore wind power has advantages such as high wind speeds, low visual and noise pollution, and no land occupation.

[0003] In related technologies, switchgear may include a circuit breaker compartment and a disconnector compartment. The circuit breaker compartment is equipped with a vacuum circuit breaker, and the disconnector compartment is equipped with a disconnector switch. A partition is installed between the circuit breaker compartment and the disconnector compartment. However, the aforementioned switchgear is relatively large in size. Utility Model Content

[0004] Therefore, it is necessary to provide a switching device that can reduce the size of the switching device.

[0005] This application provides a switching device, including:

[0006] An air-filled box is provided with an air-filling chamber, which is used to fill the insulating gas.

[0007] The first switch is located in the inflation chamber;

[0008] The second switch is located in the inflation chamber and is electrically connected to the first switch;

[0009] The first copper busbar is located in the inflation chamber and is electrically connected to the first switch;

[0010] The second copper busbar is located in the inflation chamber and is electrically connected to the second switch.

[0011] The switching device provided in this application embodiment has the first switch, the second switch, the first copper busbar, and the second copper busbar all centrally located in the same gas-filled box. This eliminates the need for partitions between any two adjacent components of the first switch, the second switch, the first copper busbar, and the second copper busbar, allowing for closer proximity between them. This modular and compact design of the first switch, the second switch, the first copper busbar, and the second copper busbar helps reduce the overall volume occupied by these components, thus reducing the overall size of the switching device. This design also meets the need for access through the narrow tower doors of the wind turbine tower during product maintenance.

[0012] In one embodiment, the connection terminals of the first switch and the second switch are in contact;

[0013] And / or, the first switch includes a three-position switch;

[0014] And / or, the second switch includes a vacuum circuit breaker;

[0015] And / or, the first copper busbar, the first switch, the second switch, and the second copper busbar are arranged sequentially along the direction from the top wall to the bottom wall of the inflation box.

[0016] In one embodiment, the first copper busbar includes a first extension section, a second extension section, and a third extension section connected in sequence, wherein the first extension section and the third extension section have different extension directions from the second extension section; the first extension section is electrically connected to a first switch, and the third extension section includes a first sub-extension section, a third sub-extension section, and a second sub-extension section connected in sequence, wherein the second extension section and the third sub-extension section are connected.

[0017] In one embodiment, the switching device includes a first bushing, a second bushing, a first cable plug, and a second cable plug. Both the first bushing and the second bushing are installed in an inflation box. The first bushing is electrically connected to a first sub-extension section, and the second bushing is electrically connected to a second sub-extension section. Both the first cable plug and the second cable plug are located outside the inflation box. The first cable plug is fitted into the first bushing, and the second cable plug is fitted into the second bushing.

[0018] In one embodiment, the switching device includes a surge arrester located outside the gas-filled box;

[0019] The surge arrester is mounted on the end of the first cable plug that is away from the gas filling box; or, the surge arrester is mounted on the end of the second cable plug that is away from the gas filling box.

[0020] In one embodiment, the switchgear includes at least one sealing component, which is disposed outside the inflation chamber. The inflation chamber is provided with at least one access port, which communicates with the inflation cavity. At least one sealing component is disposed corresponding to at least one access port, and the sealing component covers the corresponding access port. The sealing component includes a sealing plate and a sealing ring.

[0021] In the corresponding sealing assembly and inspection port, the sealing plate covers the inspection port and is connected to the inflation box, and the sealing ring is arranged around the outer periphery of the inspection port and abuts between the sealing plate and the inflation box.

[0022] In one embodiment, the sealing plate has a first sealing groove on the side facing the air box, and a sealing ring is disposed in the first sealing groove;

[0023] And / or, the inflation box is provided with a second sealing groove on the side facing the sealing plate, and the sealing ring is provided in the second sealing groove;

[0024] And / or, the number of inspection ports is multiple, including a first inspection port and a second inspection port, the first inspection port being located on the top wall of the inflation box and the second inspection port being located on the bottom wall of the inflation box.

[0025] In one embodiment, the switching device includes a first housing disposed on the bottom side of the air chamber, and a handle is provided on the side wall of the first housing;

[0026] And / or, the switchgear includes a second housing located on the side wall of the inflation chamber opposite to the inflation cavity; the top of the second housing is configured as an instrument control compartment;

[0027] And / or, the switching device includes a second housing, the second housing being a conductive element, and a grounding element connected to the bottom of the second housing;

[0028] And / or, the side wall of the inflation box includes a first side wall and a second side wall disposed opposite to each other, and each of the first side wall and the second side wall is provided with at least one lifting hole.

[0029] In one embodiment, the sidewall of the inflation box includes a first sidewall and a second sidewall disposed opposite to each other;

[0030] The switchgear includes a plurality of connection components arranged at intervals. The plurality of connection components include a first connection component and a second connection component. A first switch is connected to a first sidewall and a second sidewall through the first connection component, and a second switch is connected to the first sidewall and the second sidewall through the second connection component.

[0031] In one embodiment, the sidewall of the air box includes a third sidewall, which connects the first sidewall and the second sidewall; in the same connecting assembly, the connecting assembly includes a fixing member and two supporting members, one end of the fixing member is connected to the end of the first sidewall facing the third sidewall through one of the supporting members, and the other end of the fixing member is connected to the end of the second sidewall facing the third sidewall through the other supporting member;

[0032] The support components are welded to the air box;

[0033] And / or, the fastener is fitted to the third sidewall;

[0034] And / or, the connecting assembly includes a plug-in, the first switch and the fixing member of the first connecting assembly are connected through the plug-in of the first connecting assembly, the second switch and the fixing member of the second connecting assembly are connected through the plug-in of the second connecting assembly, the fixing member is provided with a through hole, the through hole penetrates the fixing member along the direction from the fixing member to the third sidewall, the through hole includes a first sub-through hole and a second sub-through hole that are connected, the first sub-through hole and the second sub-through hole are arranged along the direction from the fixing member to the third sidewall, the size of the first sub-through hole is smaller than the size of the second sub-through hole, the plug-in includes a first plug-in portion and a second plug-in portion that are connected, the first plug-in portion is disposed in the first sub-through hole, the second plug-in portion is disposed in the second sub-through hole, the size of the second plug-in portion is larger than the size of the first sub-through hole, and the distance between the surface of the plug-in facing the third sidewall and the opening of the through hole facing the third sidewall is greater than or equal to 0. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of a switching device provided in an embodiment of this application.

[0036] Figure 2 This is a schematic diagram of the sealing assembly provided in an embodiment of this application.

[0037] Explanation of reference numerals in the attached figures:

[0038] 100. Switchgear; 110. First copper busbar; 120. Second copper busbar; 130. Gas filling box; 131. First side wall; 132. Second side wall; 134. Fourth side wall; 135. Top wall of the box; 136. Gas filling chamber; 137. Lifting hole; 141. First switch; 142. Second switch; 151. First bushing; 152. Second bushing; 161. First cable plug; 162. Second cable plug; 163. Surge arrester; 170. Sealing assembly; 171. Sealing plate; 1711. First mounting hole; 172. Sealing ring; 181. First housing; 182. Second housing; 1821. Instrument control room; 1822. Secondary cable passage hole; 183. Handle; 184. Grounding component; 190. Connecting assembly; 191. Fixing component; 192. Support component; 193. Through hole. Detailed Implementation

[0039] 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.

[0040] 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.

[0041] 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.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "fixation," 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.

[0043] 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.

[0044] 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.

[0045] In related technologies, switchgear includes a circuit breaker compartment and a disconnector compartment. The circuit breaker compartment is equipped with a vacuum circuit breaker, and the disconnector compartment is equipped with a disconnector switch. A partition is installed between the circuit breaker compartment and the disconnector compartment.

[0046] However, since the vacuum circuit breaker is located in the circuit breaker compartment and the disconnecting switch is located in the disconnecting switch compartment, the vacuum circuit breaker and the disconnecting switch are set up separately and independently. The connection terminals of the vacuum circuit breaker and the connection terminals of the disconnecting switch are connected by a conductive structure, which makes the total volume occupied by the vacuum circuit breaker and the disconnecting switch large, resulting in a large total volume of the circuit breaker compartment and the disconnecting switch compartment, and thus a large size of the switchgear.

[0047] To address the aforementioned issues, this application provides a switching device that can reduce its size.

[0048] The following will combine Figures 1-2 The switching device 100 provided in the embodiments of this application will be described.

[0049] This application provides a switchgear 100, which may include a gas-insulated switchgear. The switchgear 100 can be used in offshore wind power projects and can be used in at least one of low-voltage, medium-voltage, and high-voltage scenarios.

[0050] See Figure 1 The switchgear 100 may include an inflation chamber 130, which has an inflation cavity 136 for dispensing insulating gas. The switchgear 100 may include a first switch 141 disposed within the inflation cavity 136. The switchgear 100 may include a second switch 142 disposed within the inflation cavity 136 and electrically connected to the first switch 141. The switchgear 100 may include a first copper busbar 110 disposed within the inflation cavity 136 and electrically connected to the first switch 141. The switchgear 100 may include a second copper busbar 120 disposed within the inflation cavity 136 and electrically connected to the second switch 142. Thus, the first switch 141, the second switch 142, the first copper busbar 110, and the second copper busbar 120 are all concentrated in the same inflation box 130. There is no need to set up a partition between any two adjacent pairs of the first switch 141, the second switch 142, the first copper busbar 110, and the second copper busbar 120. This allows the distance between any two adjacent pairs of the first switch 141, the second switch 142, the first copper busbar 110, and the second copper busbar 120 to be closer. This achieves a modular and compact design of the first switch 141, the second switch 142, the first copper busbar 110, and the second copper busbar 120, which helps to reduce the total volume occupied by the first switch 141, the second switch 142, the first copper busbar 110, and the second copper busbar 120. This, in turn, helps to reduce the volume of the switchgear 100, so as to meet the usage requirements of entering and exiting through the narrow tower door of the wind turbine tower during product maintenance.

[0051] For example, both the first switch 141 and the second switch 142 are mounted on the inflation box 130.

[0052] For example, the insulating gas may include at least one of nitrogen, air, and sulfur hexafluoride. The insulating gas may be used to extinguish the arc of the first switch 141 and the second switch 142.

[0053] In some embodiments, the connection terminals of the first switch 141 and the second switch 142 are in direct contact to achieve electrical connection. This eliminates the need for a conductive structure between the connection terminals of the first switch 141 and the second switch 142, which helps to reduce the distance between the first switch 141 and the second switch 142, reduce the total volume occupied by the first switch 141 and the second switch 142, and thus help to reduce the volume of the switching device 100.

[0054] In some embodiments, the first switch 141 includes a three-position switch.

[0055] In some embodiments, the second switch 142 includes a vacuum circuit breaker.

[0056] In some embodiments, the first copper busbar 110, the first switch 141, the second switch 142, and the second copper busbar 120 are arranged along the direction from the top wall 135 of the inflation box 130 to the bottom wall (i.e., Figure 1 The third-party direction Z) is arranged in sequence, which is conducive to the compact layout of the first copper busbar 110, the first switch 141, the second switch 142 and the second copper busbar 120.

[0057] For example, see Figure 1 The switching device 100 may have a first direction X, a second direction Y, and a third direction Z, all of which are different. For example, the first direction X, the second direction Y, and the third direction Z may be perpendicular to each other. Exemplarily, the first direction X may be the length direction of the switching device 100, the second direction Y may be the width direction of the switching device 100, and the third direction Z may be the height direction of the switching device 100. The length, width, and height, etc., in the embodiments of this application are merely for descriptive convenience and do not imply any limitation on the dimensions. For example, the width may be greater than, equal to, or less than the length.

[0058] In some embodiments, the first copper busbar 110 includes a first extension section, a second extension section, and a third extension section connected in sequence. The first and third extension sections extend in different directions than the second extension section, which helps to reduce the total extension length of the first copper busbar 110 along the same direction, resulting in a more compact layout. The first extension section is electrically connected to the first switch 141. At least a portion of the first extension section extends along a third direction Z, and at least a portion of the second extension section extends along a second direction Y. This helps to shorten the total length of the first copper busbar 110 along a third direction Z, preventing the inflation box 130 from becoming too large along this direction. Furthermore, the second extension section allows for more flexible placement of the third extension section. The third extension section includes a first sub-extension section, a third sub-extension section, and a second sub-extension section connected in sequence. For example, the first, third, and second sub-extension sections are arranged along a third direction Z, and the second and third sub-extension sections are connected. A portion of the current on the first copper busbar 110 is transmitted through the first sub-extension section, and the other portion is transmitted through the second sub-extension section. This facilitates the application of the switchgear 100 in high-current scenarios to meet the increasing capacity requirements of the supporting wind turbine units.

[0059] In some embodiments, the switchgear 100 includes a first sleeve 151, a second sleeve 152, a first cable plug 161, and a second cable plug 162. Both the first sleeve 151 and the second sleeve 152 pass through and are installed in the inflation box 130. The first sleeve 151 is electrically connected to a first sub-extension section, and the second sleeve 152 is electrically connected to a second sub-extension section. Both the first cable plug 161 and the second cable plug 162 are located outside the inflation box 130. The first cable plug 161 is fitted into the first sleeve 151 and is electrically connected to it. The second cable plug 162 is fitted into the second sleeve 152 and is electrically connected to it. The first sleeve 151 and the second sleeve 152 can both be located on the outgoing or incoming side of the switchgear 100. This embodiment uses the example of the first sleeve 151 and the second sleeve 152 being located on the outgoing side for illustration. Thus, the current through the first sub-extension section can be transmitted through the first bushing 151 and the first cable plug 161, and the current through the second sub-extension section can be transmitted through the second bushing 152 and the second cable plug 162. The first cable plug 161 and the second cable plug 162 can be used to connect to an external circuit (for example, to an external circuit via a cable, which can be the power grid). By setting the first cable plug 161 and the second cable plug 162, a dual-cable scheme is adopted on the outgoing side of the switchgear 100, enabling the switchgear 100 to be used in high-current scenarios to meet the increasing capacity requirements of the supporting wind turbine units. The first cable plug 161 is fitted onto the first sleeve 151, and the second cable plug 162 is fitted onto the second sleeve 152. This arrangement ensures that the first cable plug 161 and the second cable plug 162 are fitted onto different sleeves, avoiding the situation where the first cable plug 161 and the second cable plug 162 are fitted onto the same sleeve. This would cause greater stress on the same sleeve during tilting or swaying, thus avoiding the risk of failure caused by tilting or swaying. This improves the power supply safety and reliability of the switchgear 100, enhances the product's anti-vibration and anti-tilt reliability, reduces the probability of failure of the switchgear 100, and significantly reduces the workload and cost of subsequent maintenance of the switchgear 100.

[0060] For example, the first cable plug 161 and the second cable plug 162 can be cable front plugs.

[0061] For example, the first sleeve 151 and the second sleeve 152 are inserted through the second sidewall 132.

[0062] For example, the third extension segment can extend Z along a third party. Alternatively, both the first and second sub-extension segments include a first sub-part and a second sub-part, with the second sub-part connected between the first sub-part and the third sub-extension segment. The first sub-part extends Z along a third party, and the second sub-part can be inclined relative to the third party in the Z direction. The end of the second sub-part closer to the third sub-extension segment is inclined in a direction away from the first extension segment relative to the end away from the third sub-extension segment. In this way, the first sub-part is farther from the second sidewall 132, resulting in a larger space between the first sub-part and the second sidewall 132. The first sub-part of the first sub-extension segment is connected to the first sleeve 151, and the first sub-part of the second sub-extension segment is connected to the second sleeve 152. This increases the accommodating space of the inflation box 130 for the first sleeve 151 and the second sleeve 152 without increasing the volume of the inflation box 130, which is beneficial for reducing the volume of the switchgear 100.

[0063] In some embodiments, the switchgear 100 includes a surge arrester 163 located outside the gas chamber 130. The surge arrester 163 can be used to protect the switchgear 100 from damage caused by lightning overvoltage and / or operational overvoltage.

[0064] For example, surge arrester 163 can be a rear-mounted surge arrester.

[0065] For example, surge arrester 163 is fitted onto the end of first cable plug 161 opposite to the gas filling box 130, and surge arrester 163 is electrically connected to first cable plug 161. Alternatively, surge arrester 163 is fitted onto the end of second cable plug 162 opposite to the gas filling box 130, and surge arrester 163 is electrically connected to second cable plug 162. Thus, by fitting the first cable plug 161 onto the first sleeve 151, the second cable plug 162 onto the second sleeve 152, and the surge arrester 163 onto either the first cable plug 161 or the second cable plug 162, the three components—the first cable plug 161, the second cable plug 162, and the surge arrester 163—are rationally distributed and connected to the first sleeve 151 and the second sleeve 152. This avoids placing the first cable plug 161, the second cable plug 162, and the surge arrester 163 on the same sleeve, which would result in greater stress on the same sleeve during tilting and swaying. This avoids the risk of failure caused by tilting and swaying, improves the power supply safety and reliability of the switchgear 100, and enhances the product's anti-vibration and anti-tilt reliability.

[0066] In some embodiments, the switchgear 100 includes at least one sealing component 170, which is located outside the inflation chamber 130 to facilitate its installation and removal. The inflation chamber 130 has at least one access port communicating with the inflation cavity 136. At least one sealing component 170 is correspondingly positioned to each access port, and the sealing component 170 covers the corresponding access port to seal it. By disassembling the sealing component 170, components in the inflation cavity 136 can be inspected and repaired through the access port, which helps reduce the workload and cost of subsequent maintenance of electrical equipment in offshore wind farms.

[0067] In this embodiment, the correspondence between A and B can refer to one A corresponding to at least one B, or one B corresponding to at least one A. This embodiment uses the example of one A corresponding to one B. Similarly, the correspondence between sealing component 170 and access port can refer to one sealing component 170 corresponding to at least one access port, or one access port corresponding to at least one sealing component 170. This embodiment uses the example of one access port corresponding to one sealing component 170.

[0068] For example, see Figure 2 The sealing assembly 170 includes a sealing plate 171 and a sealing ring 172. In the corresponding sealing assembly 170 and the access port, the sealing plate 171 covers the access port and is connected to the inflation box 130. The sealing ring 172 is arranged around the outer periphery of the access port and abuts against the sealing plate 171 and the inflation box 130. By setting the sealing ring 172, the sealing reliability between the sealing plate 171 and the inflation box 130 can be improved, so as to ensure good airtightness and temperature rise performance of the product.

[0069] For example, see Figure 2 In the corresponding sealing assembly 170 and inspection port, the sealing plate 171 is provided with a first mounting hole 1711, and the outer periphery of the inspection port is provided with a second mounting hole, with the first mounting hole 1711 and the second mounting hole being arranged opposite to each other. The switchgear 100 includes a connector, which is inserted into the first mounting hole 1711 and the second mounting hole, connecting the sealing plate 171 and the gas filling box 130 through the connector. For example, the connector may include screws, bolts, etc.

[0070] There can be multiple first mounting holes 1711, which are arranged at intervals along an annular path. There can also be multiple second mounting holes, which are arranged at intervals along an annular path. For example, both the multiple first mounting holes 1711 and the multiple second mounting holes can be arranged on the outer periphery of the sealing ring 172.

[0071] In some embodiments, the sealing plate 171 has a first sealing groove on the side facing the inflation box 130, and the sealing ring 172 is disposed in the first sealing groove. In this way, the first sealing groove can limit the sealing ring 172, which helps to reduce the assembly difficulty of the sealing ring 172 and also helps to prevent the sealing ring 172 from being misaligned, thus reducing the sealing effect. The first sealing groove is disposed around the outer periphery of the corresponding inspection port.

[0072] In some embodiments, the inflation box 130 has a second sealing groove on the side facing the sealing plate 171, and the sealing ring 172 is disposed in the second sealing groove. In this way, the second sealing groove can limit the sealing ring 172, which helps to reduce the assembly difficulty of the sealing ring 172 and also helps to prevent the sealing ring 172 from being misaligned, thus reducing the sealing effect. The second sealing groove is disposed around the outer periphery of the corresponding inspection port.

[0073] The switchgear 100 may be provided with at least one of a first sealing groove and a second sealing groove. In an embodiment where both a first sealing groove and a second sealing groove are provided, the first sealing groove and the second sealing groove are arranged opposite to each other, with a portion of the sealing ring 172 disposed in the first sealing groove and another portion of the sealing ring 172 disposed in the second sealing groove.

[0074] In some embodiments, at least one inspection port includes a first inspection port, which is located on the top wall 135 of the inflation box 130. Thus, by providing a first inspection port on the top wall 135 of the inflation box 130 and covering it with a corresponding sealing plate 171, the first switch 141 and the first copper busbar 110 and other components inside the inflation chamber 136 can be inspected without damaging the inflation box 130.

[0075] In some embodiments, there are multiple access ports, including a first access port and a second access port. The first access port is located on the top wall 135 of the inflation box 130, and the second access port is located on the bottom wall of the inflation box 130. Thus, by providing the first access port on the top wall 135 of the inflation box 130 and covering it with a corresponding sealing plate 171, maintenance can be performed on components such as the first switch 141 and the first copper busbar 110 inside the inflation chamber 136 without damaging the inflation box 130. Similarly, by providing the second access port on the bottom wall of the inflation box 130 and covering it with a corresponding sealing plate 171, maintenance can be performed on components such as the second switch 142 and the second copper busbar 120 inside the inflation chamber 136 without damaging the inflation box 130.

[0076] In some embodiments, see Figure 1The switchgear 100 includes a first housing 181, which is located on the bottom side of the inflation box 130. A handle 183 is provided on the side wall of the first housing 181. The first housing 181 has multiple side walls, and at least one side wall can be provided with a handle 183. One side wall of the first housing 181 includes a fifth side wall, on which the handle 183 is located. The fifth side wall is detachably connected to the inflation box 130. By providing a handle 183 on the fifth side wall, the difficulty of installing and removing the fifth side wall can be reduced, facilitating the maintenance of components inside the first housing 181.

[0077] For example, a receiving cavity is provided inside the first housing 181, in which components (e.g., cables) can be placed. The top of the first housing 181 has an opening that communicates with the receiving cavity. The bottom wall of the inflation box 130 covers the opening. By removing the fifth side wall of the first housing 181, the bottom wall of the inflation box 130 can be exposed, thereby allowing the components inside the inflation box 130 to be inspected and repaired through the second inspection port of the inflation box 130.

[0078] In some embodiments, see Figure 1 The switchgear 100 includes a second housing 182, which is located on the side wall of the inflation box 130 opposite to the inflation chamber 136, and on the fourth side wall 134 of the inflation box 130 opposite to the inflation chamber 136. The top of the second housing 182 is configured as an instrument control compartment 1821.

[0079] For example, a control circuit may be provided in the instrument control room 1821, which can control the switching device 100. A secondary wiring hole 1822 may be provided on the side wall of the instrument control room 1821 to facilitate the connection between the external circuit and the control circuit.

[0080] In some embodiments, the second housing 182 is a conductive element (e.g., a metal element), and a grounding element 184 is connected to the bottom of the second housing 182. By connecting the second housing 182 to the grounding element 184, electric shock accidents caused by the second housing 182 being energized can be prevented, thus protecting equipment and personal safety.

[0081] For example, at least one of the first housing 181 and the inflation box 130 may be a conductive element (e.g., a metal element).

[0082] In some embodiments, the sidewalls of the inflation box 130 include a first sidewall 131 and a second sidewall 132 disposed opposite to each other along a second direction Y. Each of the first sidewall 131 and the second sidewall 132 is provided with at least one lifting hole 137, which facilitates the hoisting of the switchgear 100.

[0083] In some embodiments, the sidewall of the inflation box 130 may include a third sidewall ( Figure 1 (Not shown in the diagram) The third sidewall connects to the first sidewall 131 and the second sidewall 132. The switching device 100 includes a plurality of connecting assemblies 190 spaced apart, which are disposed in the inflation chamber 136. The plurality of connecting assemblies 190 are arranged along the direction from the top wall 135 to the bottom wall of the inflation chamber 130. Each connecting assembly 190 includes at least one first connecting assembly and at least one second connecting assembly. The first switch 141 is connected to the first sidewall 131 and the second sidewall 132 via the first connecting assembly, and the second switch 142 is connected to the first sidewall 131 and the second sidewall 132 via the second connecting assembly. In this way, the dimension of the connecting assembly 190 along the third direction Z is small, which helps to reduce the weight and volume occupied by the connecting assembly 190. The connecting component 190 can be installed first, and then the third side wall of the air box 130 can be installed. When installing the connecting component 190, since there is a gap between two adjacent connecting components 190, the assembly status of the first switch 141, the second switch 142 and the corresponding connecting component 190 can be observed through the gap between the two adjacent connecting components 190, which helps to reduce the assembly difficulty of the first switch 141, the second switch 142 and the corresponding connecting component 190.

[0084] In some embodiments, the sidewall of the inflation box 130 may further include a fourth sidewall 134, which is disposed opposite to the third sidewall along a first direction X. The first sidewall 131, the third sidewall, the second sidewall 132, and the fourth sidewall 134 are connected end-to-end in sequence. At least one of the first switch 141 and the second switch 142 may be connected to the fourth sidewall 134. When the first switch 141 is connected to the fourth sidewall 134 and connected to the first sidewall 131 and the second sidewall 132 through a first connecting assembly, the seismic and tilt resistance of the switching device 100 can be further improved. When the second switch 142 is connected to the fourth sidewall 134 and connected to the first sidewall 131 and the second sidewall 132 through a second connecting assembly, the seismic and tilt resistance of the switching device 100 can be further improved.

[0085] In some embodiments, in the same connecting assembly 190, the connecting assembly 190 includes a fixing member 191 (e.g., a fixing plate) and two supporting members 192. One end of the fixing member 191 is connected to the end of the first sidewall 131 facing the third sidewall through one of the supporting members 192, and the other end of the fixing member 191 is connected to the end of the second sidewall 132 facing the third sidewall through the other supporting member 192. The fixing member 191 extends along the direction from the first sidewall 131 to the second sidewall 132, and the two supporting members 192 are respectively disposed at both ends of the extension direction of the fixing member 191.

[0086] For example, the support member 192 is welded to the air box 130. In the same connecting assembly 190, one of the two support members 192 is welded to the first side wall 131, and the other of the two support members 192 is welded to the second side wall 132.

[0087] In some embodiments, the fastener 191 is fitted and in direct contact with the third sidewall, which makes the distance between the fastener 191 and the third sidewall relatively close, and makes the layout of the fastener 191 and the third sidewall compact, which is beneficial to reducing the volume of the air box 130.

[0088] In some embodiments, the connecting component 190 includes a connector. The first switch 141 and the fixing member 191 of the first connecting component are connected through the connector of the first connecting component. The second switch 142 and the fixing member of the second connecting component are connected through the connector of the second connecting component. The fixing member 191 is provided with a through hole 193, which penetrates the fixing member 191 along the direction from the fixing member 191 to the third sidewall. The through hole 193 includes a first sub-through hole and a second sub-through hole that are connected. The first sub-through hole and the second sub-through hole are arranged along the direction from the fixing member 191 to the third sidewall. The size of the first sub-through hole is smaller than the size of the second sub-through hole. The connector includes a first plug-in portion and a second plug-in portion. The size of the first plug-in portion is smaller than the size of the second plug-in portion. The first plug-in portion passes through the first sub-through hole, and the second plug-in portion is disposed in the second sub-through hole. The size of the second plug-in portion is larger than the size of the first sub-through hole. The distance between the side of the connector facing the third sidewall and the opening of the through hole 193 facing the third sidewall is greater than or equal to 0. In this way, the second part of the connector is completely housed in the second through hole, which can prevent the connector from protruding from the second through hole and thus prevent the fastener 191 from being unable to fit tightly with the third sidewall. This helps to improve the tightness of the fit between the fastener 191 and the third sidewall, making the layout of the fastener 191 and the third sidewall compact, which helps to reduce the volume of the air box 130.

[0089] For example, through hole 193 can be a countersunk hole. Connectors can include bolts or screws, etc.

[0090] In some embodiments, one end of the second copper busbar 120 is electrically connected to the second switch 142, and the other end of the second copper busbar 120 is connected to the third sleeve. The third sleeve can be electrically connected to the third cable plug, and the third cable plug can be connected to the cable.

[0091] For example, the third cable plug can be a front cable plug. When the first cable plug 161 and the second cable plug 162 are located on the outgoing side, the third cable plug can be located on the incoming side. When the first cable plug 161 and the second cable plug 162 are located on the incoming side, the third cable plug can be located on the outgoing side.

[0092] 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.

[0093] 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. A switching device, characterized by The utility model relates to a switch equipment, including: Inflating box is equipped with inflating cavity, the inflating cavity is used to set up insulating gas; First switch is located in the inflating cavity; Second switch is located in the inflating cavity, and is electrically connected with the first switch; First copper row is located in the inflating cavity, and is electrically connected with the first switch; Second copper row is located in the inflating cavity, and is electrically connected with the second switch.

2. The switching device of claim 1, wherein The connecting terminal of the first switch and the connecting terminal of the second switch contact.

3. The switching device of claim 1, wherein The first switch includes three-position switch.

4. The switching device of claim 1, wherein The second switch includes vacuum circuit breaker.

5. The switching device of claim 1, wherein The first copper row, the first switch, the second switch and the second copper row are sequentially arranged along the direction from the tank top wall to the tank bottom wall of the inflating box.

6. The switching device according to any of claims 1-5, characterized in that The first copper row includes sequentially connected first extension section, second extension section and third extension section, the first extension section and the third extension section are different from the extension direction of the second extension section;The first extension section is electrically connected with the first switch, and the third extension section includes sequentially connected first sub-extension section, third sub-extension section and second sub-extension section, and the second extension section is connected with the third sub-extension section.

7. The switching device of claim 6, wherein The switch equipment includes first sleeve, second sleeve, first cable plug and second cable plug, the first sleeve and the second sleeve are both worn in the inflating box, the first sleeve is electrically connected with the first sub-extension section, the second sleeve is electrically connected with the second sub-extension section, the first cable plug and the second cable plug are both located outside the inflating box, the first cable plug is sleeved on the first sleeve, and the second cable plug is sleeved on the second sleeve.

8. The switching device of claim 7, wherein The switch equipment includes lightning arrester, and the lightning arrester is located outside the inflating box; The lightning arrester is sleeved on one end of the first cable plug away from the inflating box, or the lightning arrester is sleeved on one end of the second cable plug away from the inflating box.

9. The switching device according to any of claims 1-5, characterized in that The switch equipment includes at least one sealing assembly, the sealing assembly is located outside the inflating box, at least one access hole is arranged on the inflating box, the access hole is communicated with the inflating cavity, the at least one sealing assembly is correspondingly arranged with the at least one access hole, the sealing assembly cover is arranged on the corresponding access hole, and the sealing assembly includes sealing plate and sealing ring. In the corresponding sealing assembly and the access hole, the sealing plate cover is arranged on the access hole and connected with the inflating box, and the sealing ring is annularly arranged on the outer periphery of the access hole and abuts between the sealing plate and the inflating box.

10. The switching device of claim 9, wherein One side of the sealing plate towards the inflating box is provided with a first sealing groove, and the sealing ring is arranged in the first sealing groove.

11. The switching device of claim 9, wherein One side of the inflating box towards the sealing plate is provided with a second sealing groove, and the sealing ring is arranged in the second sealing groove.

12. The switching device of claim 9, wherein The number of the access holes is multiple, and the multiple access holes include a first access hole and a second access hole, the first access hole is arranged on the tank top wall of the inflating box, and the second access hole is arranged on the tank bottom wall of the inflating box.

13. The switching device of any of claims 1-5, wherein, The switch equipment includes a first shell, the first shell is arranged on the bottom side of the inflating box, and a handle is arranged on the shell side wall of the first shell.

14. The switching device of any of claims 1-5, wherein, The switch device comprises a second shell arranged on a side of a tank side wall of the tank away from the inflation cavity; and a top of the second shell is configured as an instrument control chamber.

15. The switching device of any one of claims 1-5, wherein, The switch device comprises a second shell which is a conductive part, and a bottom of the second shell is connected with a grounding part.

16. The switching device of any of claims 1-5, wherein, The tank side wall comprises oppositely arranged first and second side walls, and at least one lifting hole is arranged on each of the first and second side walls.

17. The switching device of any of claims 1-5, wherein, The tank side wall comprises oppositely arranged first and second side walls. The switch device comprises a plurality of connection assemblies arranged at intervals, the connection assemblies are arranged in the inflation cavity, the plurality of connection assemblies comprise first and second connection assemblies, the first switch is connected to the first and second side walls through the first connection assembly, and the second switch is connected to the first and second side walls through the second connection assembly.

18. The switching device of claim 17, wherein, The tank side wall comprises a third side wall connecting the first and second side walls; in the same connection assembly, the connection assembly comprises a fixing part and two supporting parts, one end of the fixing part is connected to one end of the first side wall facing the third side wall through one of the supporting parts, and the other end of the fixing part is connected to one end of the second side wall facing the third side wall through the other supporting part. The supporting part is welded to the tank.

19. The switching device of claim 18, wherein, The fixing part is attached to the third side wall.

20. The switching device of claim 18, wherein, The connection assembly comprises a plug-in part, the first switch and the fixing part of the first connection assembly are connected through the plug-in part of the first connection assembly, the second switch and the fixing part of the second connection assembly are connected through the plug-in part of the second connection assembly, the fixing part is provided with a through hole penetrating through the fixing part in a direction from the fixing part to the third side wall, the through hole comprises a first sub-through hole and a second sub-through hole in communication, the first and second sub-through holes are arranged in the direction from the fixing part to the third side wall, the first sub-through hole is smaller than the second sub-through hole, the plug-in part comprises a first plug-in part and a second plug-in part connected to each other, the first plug-in part is arranged in the first sub-through hole, the second plug-in part is arranged in the second sub-through hole, the second plug-in part is larger than the first sub-through hole, and a distance between a surface of the plug-in part facing the third side wall and an orifice of the through hole facing the third side wall is greater than or equal to 0.

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