Vacuum parallel switch device and switchgear

Abstract

The application relates to the technical field of switch device, and particularly discloses a vacuum parallel switch device and a switch equipment. The vacuum parallel switch device comprises an isolation contact, an isolation knife switch, a vacuum arc extinguishing mechanism and a transmission mechanism. The transmission mechanism comprises a transmission piece, a sliding piece, a first elastic piece and a tripping piece. The isolation knife switch can rotate in a first rotating direction to separate from and move away from the isolation contact, and in the process, the transmission piece is driven to rotate, so that the transmission piece drives the first lock catch to gradually approach the second lock catch while driving the moving contact and the static contact to gradually separate, and after the moving contact and the static contact are completely separated, the first lock catch is locked to the second lock catch; the isolation knife switch can also rotate in a second rotating direction to approach and engage with the isolation contact, and in the process of starting to contact the isolation contact to rotating to the position, the tripping piece can be driven to move, so that the tripping piece drives the second lock catch to separate from the first lock catch. The vacuum parallel switch device has better safety in opening and closing operation.

Description

Technical Field

[0001] This invention relates to the field of switching device technology, and in particular to a vacuum parallel switching device and switching equipment. Background Technology

[0002] SF6 gas has excellent arc-quenching and insulation properties and is widely used in medium and high voltage switchgear. However, SF6 is a strong greenhouse gas and produces toxic gases during the switching process. Therefore, it has been gradually replaced by air. However, air has poor insulation properties, making it difficult to extinguish the arc generated when the switch is opened. The intense combustion of the arc can easily lead to a fire risk.

[0003] Therefore, load switch breaking schemes widely adopt a parallel connection of vacuum interrupters and disconnectors, while using environmentally friendly gas (air) insulation. In this scheme, current flows normally through the disconnector when closing, and is interrupted by the vacuum interrupter when opening, effectively extinguishing the arc. During the opening and closing process of the load switch, the actuation of the vacuum interrupter usually relies on the cooperation between the disconnector and the transmission mechanism. Traditional transmission mechanisms only have simple transmission functions. When the disconnector separates from the transmission mechanism, the vacuum interrupter will engage under the action of self-closing force. This poses a risk of discharge when the disconnector rotates to a position close to the transmission mechanism during closing.

[0004] Therefore, there is an urgent need to propose a vacuum parallel switch device and switching equipment to solve the above-mentioned technical problems. Summary of the Invention

[0005] According to one aspect of the present invention, a vacuum parallel switch device is provided, which can transfer current to a vacuum arc-extinguishing mechanism through a transmission mechanism for arc extinguishing, thereby improving the safety and reliability of the opening operation. Furthermore, it can achieve opening retention after vacuum arc extinguishing, avoiding the risk of discharge between the isolating switch and the transmission mechanism, and improving the safety and reliability of the closing operation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: Vacuum parallel switching device, including: Isolation contacts; The isolating switch is rotatable in a first rotational direction to disengage from the isolating contact, and rotatable in a second rotational direction to engage with the isolating contact; A vacuum interrupting mechanism includes an insulating shell and a vacuum interrupting chamber installed inside the insulating shell. The vacuum interrupting chamber is provided with a stationary contact and a moving contact, and the stationary contact is electrically connected to the isolating contact. The transmission mechanism includes a transmission component, a sliding component, a first elastic component, and a release component. The transmission component is rotatably connected to the insulating housing. One end of the transmission component is hinged to the moving contact, and the other end is provided with a first latch. The sliding component is slidably assembled to the insulating housing and is provided with a second latch. The first elastic component is configured to always have a tendency to pull the sliding component closer to the first latch. One end of the release component is connected to the sliding component, and the release component can pull the sliding component away from the first latch when driven. During the rotation of the isolating switch along the first rotation direction, it can contact the transmission component and drive the transmission component to rotate. This causes the transmission component to gradually separate the moving contact from the stationary contact while also causing the first latch to gradually approach the second latch. After the moving contact and the stationary contact are separated, the first latch is locked to the second latch, so that the transmission component keeps the moving contact and the stationary contact separated. During the rotation of the isolating switch along the second rotation direction, it first engages with the isolating contact, and then continues to rotate to contact the tripping member and drive the tripping member to move, so that the tripping member pulls the sliding member away from the first latch, thereby causing the second latch to separate from the first latch.

[0007] Optionally, the other end of the transmission component is provided with a locking block, the first latch is a slot provided on the locking block, and the side wall of the locking block near the sliding component is provided with a first arc surface, which is smoothly connected to the slot. The second latch is a latching protrusion located at one end of the sliding member. The sliding member is provided with a guide block, and the guide block has a second arc surface on its side wall near the locking block. The second arc surface is smoothly connected to the latching protrusion. As the locking block rotates toward the sliding member, the first arc surface can cooperate with the second arc surface to push the sliding member away from the slot until the slot is in place. Then, the first elastic member pulls the sliding member to make the card protrusion engage in the slot.

[0008] Optionally, the insulating housing is provided with a support arm, the support arm is provided with a slide rail, the sliding member includes a sliding frame, the sliding frame is provided with a slide groove, and the slide groove is slidably connected to the slide rail; The sliding frame is provided with a second latch at one end in the sliding direction, and a connecting beam at the other end in the sliding direction, which is connected to the release element.

[0009] Optionally, the support arm is further provided with a guide groove, the guide groove is connected to the slide rail, the sliding frame is provided with a guide arm, and the end of the guide arm is slidably connected to the guide groove; and / or, the sliding frame is provided with a connecting part, one end of the first elastic member is connected to the connecting part, and the other end is connected to the insulating shell.

[0010] Optionally, the tripping component includes a first tripping component and a second tripping component, both of which are rotatably connected to the isolating contact. One end of the first tripping component is movably connected to the sliding member, and the other end slides against the first end of the second tripping component. The second end of the second tripping component is used to cooperate with the isolating switch. During the rotation of the isolating switch along the second rotation direction, it can contact the second end of the second tripping member and push the second tripping member to rotate, so that the first end of the second tripping member drives the first tripping member to rotate, thereby causing the first tripping member to pull the sliding member away from the first latch.

[0011] Optionally, there are two first tripping components, which are respectively disposed on opposite sides of the isolating contact; The second tripping component includes two tripping arms and an unlocking part connecting the two tripping arms. The two tripping arms are respectively disposed on opposite sides of the isolating contact and are rotatably connected to the isolating contact. The tripping arms are arranged in a one-to-one correspondence with the first tripping component. The other end of the first tripping component slides against the tripping arm corresponding to it. The unlocking part is close to the isolating switch and is used to cooperate with the isolating switch.

[0012] Optionally, the second tripping member is connected to the second elastic member. The second tripping member has a clearance position and a tripping position. The second elastic member is configured to always have a tendency to push the second tripping member to rotate from the tripping position to the clearance position. When the second tripping member is in the clearance position, the second locking member can lock with the first locking member. During the rotation of the isolating switch along the second rotation direction, it can drive the second tripping member to move from the clearance position to the tripping position, so that the second tripping member drives the first tripping member to rotate, thereby causing the first tripping member to pull the sliding member away from the first locking member.

[0013] Optionally, the end of the transmission component with the first latch is electrically connected to the moving contact via a wire.

[0014] Optionally, the vacuum parallel switch device further includes a third elastic element, one end of which is connected to the transmission element and the other end of which is connected to the insulating housing. The third elastic element is configured to always have a tendency to push the first latch to rotate away from the second latch.

[0015] Optionally, the other end of the transmission component is provided with a first conductive arm and a second conductive arm, and elastic conductive elements are provided on opposite sides of the first conductive arm. The isolating switch includes two spaced-apart conductive plates, each corresponding to one of the elastic conductive elements. During the rotation of the isolating switch in the first rotation direction, the conductive plates first slide electrically connected to their corresponding elastic conductive elements until they separate from the isolating contacts. Then, both conductive plates simultaneously contact the second conductive arm and push the transmission element to rotate through the second conductive arm.

[0016] Optionally, the second conductive arm is rotatably connected to the transmission member. The second conductive arm has a first working position and a second working position. During the process of the two conductive plates cooperating with the second conductive arm, the second conductive arm can be driven to rotate from the first working position to the second working position. The second conductive arm is connected to a fourth elastic member, which is configured to always have the tendency to push the second conductive arm to rotate from the second working position to the first working position.

[0017] According to another aspect of the present invention, the present invention also provides a switching device, including a cabinet and a vacuum parallel switch device as described in any of the above-described technical solutions, wherein the vacuum parallel switch device is disposed within the cabinet.

[0018] The beneficial effects of this invention are as follows: This invention provides a vacuum parallel switch device, including an isolating contact, an isolating switch, a vacuum arc-extinguishing mechanism, and a transmission mechanism. During the process of the isolating switch rotating in a first rotation direction and disengaging from and moving away from the isolating contact, the isolating switch first contacts the end of the transmission component equipped with a first latch, transferring current through the transmission component to the vacuum arc-extinguishing mechanism. Then, it continues to rotate, driving the transmission component to rotate. The rotation of the transmission component causes the moving contact and the stationary contact to gradually separate, causing an arc to be generated in the vacuum arc-extinguishing chamber. Arc extinguishing is achieved through vacuum, improving the safety and reliability of the opening operation. Simultaneously, during the gradual separation of the moving contact and the stationary contact, the first latch gradually approaches the second latch, and after the moving contact and the stationary contact are completely separated (the moving contact moves to a position where it is in contact with the stationary contact), the switching device is activated. The distance between the heads is a specified opening distance. The first and second latches are locked together. The locking of the first and second latches will keep the transmission component stationary, thereby causing the transmission component to drive the moving contact to remain separated from the stationary contact, so as to realize the opening of the vacuum arc extinguishing mechanism. The opening state of the vacuum arc extinguishing mechanism will not be released until the isolating switch rotates along the second rotation direction to engage with the isolating contact. With this setting, when the isolating switch rotates to a position close to the vacuum arc extinguishing mechanism during the closing operation, there will be no discharge between the isolating switch and the vacuum arc extinguishing mechanism because the vacuum arc extinguishing mechanism is in the opening state, which improves the safety and reliability of closing.

[0019] The vacuum arc extinguishing mechanism is kept open by locking the first and second latches, and the first and second latches are unlocked by cooperating with the isolating switch and the tripping component. The control is convenient, smooth and simple.

[0020] The first elastic element ensures the reliability of the locking between the first and second latches, and also enables the second latch to reset after unlocking, thus ensuring the reliability of the cooperation between the second and first latches.

[0021] The present invention also provides a switchgear, including a cabinet and the aforementioned vacuum parallel switch device. Because this switchgear employs the aforementioned vacuum parallel switch device, its opening and closing operations offer superior safety and reliability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the vacuum parallel switch device provided in an embodiment of the present invention; Figure 2 A schematic diagram illustrating the engagement of the sliding member, the first tripping member, and the second tripping member according to an embodiment of the present invention; Figure 3 This is a schematic diagram showing the locking of the first latch and the second latch according to an embodiment of the present invention; Figures 4-7 This is a schematic diagram of the opening process of the vacuum parallel switch device provided in an embodiment of the present invention; Figure 8 and Figure 9A schematic diagram of the closing process of the vacuum parallel switch device provided in an embodiment of the present invention.

[0023] In the picture: 10. Main busbar; 20. Isolation spindle; 30. Bushing; 100. Isolation contacts; 200. Vacuum arc-extinguishing mechanism; 210. Insulating shell; 211. Support arm; 2111. Guide groove; 220. Stationary contact; 230. Moving contact; 300. Transmission mechanism; 310. Transmission component; 311. Locking block; 3111. First latch; 3112. First arc surface; 320. Sliding component; 321. Sliding frame; 3211. Slide groove; 322. Second latch; 323. Connecting beam; 324. Guide arm; 325. Connecting part; 326. Guide block; 3261. Second arc surface; 327. First conductive support arm; 3271. Groove; 328. Second conductive support arm; 330. First elastic element; 340. Release element; 341. First release element; 342. Second release element; 3421. Unlocking part; 3422. Release arm; 350. Wire; 400. Isolating switch; 500, Third elastic element; 600. Insulating protective cover. Detailed Implementation

[0024] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] This embodiment provides a vacuum parallel switch device that can transfer current to a vacuum arc-extinguishing mechanism through a transmission mechanism for arc extinguishing, thereby improving the safety and reliability of the opening operation. It can also maintain the opening after vacuum arc extinguishing, avoiding the risk of discharge between the isolating switch and the transmission mechanism, and improving the safety and reliability of the closing operation.

[0029] Specifically, such as Figures 1-9 As shown, the vacuum parallel switchgear includes an isolating contact 100, a vacuum arc extinguishing mechanism 200, a transmission mechanism 300, and an isolating knife switch 400.

[0030] The isolating switch 400 is rotatable in a first rotation direction to disengage from and move away from the isolating contact 100, and is rotatable in a second rotation direction to approach and engage with the isolating contact 100. It is understood that when the isolating switch 400 engages with the isolating contact 100, the main circuit current is conducted, and the vacuum parallel switch device achieves closing; when the isolating switch 400 disengages from the isolating contact 100, the main circuit current is disconnected. It is understood that the first rotation direction and the second rotation direction are opposite. In this embodiment, the first rotation direction is counterclockwise, and the second rotation direction is clockwise.

[0031] The vacuum arc-extinguishing mechanism 200 includes an insulating housing 210 and a vacuum arc-extinguishing chamber installed within the insulating housing 210. The vacuum arc-extinguishing chamber contains a stationary contact 220 and a moving contact 230, with the stationary contact 220 electrically connected to the isolating contact 100. When the vacuum parallel switchgear is opened, the current is transferred to the vacuum arc-extinguishing mechanism 200 via the isolating switch 400, extinguishing the arc generated during opening. This ensures safe operation even when air is used as the insulating gas. In one possible embodiment, the stationary contact 220 can be electrically connected to the isolating contact 100 via the main busbar 10. In other embodiments, the electrical connection between the stationary contact 220 and the isolating contact 100 can be different, depending on actual needs. It is understood that the insulating housing 210 serves as an insulating mounting bracket to facilitate the assembly of the vacuum arc-extinguishing mechanism 200.

[0032] The transmission mechanism 300 includes a transmission member 310, a sliding member 320, a first elastic member 330, and a release member 340. The transmission member 310 is rotatably connected to the insulating housing 210. One end of the transmission member 310 is hinged to the moving contact 230, and the other end is provided with a first latch 3111. The sliding member 320 is slidably mounted on the insulating housing 210 and is provided with a second latch 322. The first elastic member 330 is configured to always have a tendency to pull the sliding member 320 closer to the first latch 3111. One end of the release member 340 is connected to the sliding member 320, and the release member 340 can pull the sliding member 320 away from the first latch 3111 when driven.

[0033] The working principle of this vacuum parallel switch device is as follows: During the process of isolating switch 400 rotating in the first rotation direction to disengage from and move away from isolating contact 100, isolating switch 400 will first contact the end of transmission member 310 with the first latch 3111, transferring current through transmission member 310 to vacuum arc extinguishing mechanism 200. As isolating switch 400 continues to rotate, isolating switch 400 will drive transmission member 310 to rotate. Figure 1The transmission component 310 rotates counterclockwise, causing it to pull the moving contact 230 and the stationary contact 220 in the vacuum arc extinguishing mechanism 200 to gradually separate. When the moving contact 230 and the stationary contact 220 separate, an electric arc is generated. Since the electric arc is generated in the vacuum arc extinguishing mechanism 200, it can be extinguished by vacuum. Compared with the prior art where the electric arc is generated between the isolating switch 400 and the isolating contact 100 and is extinguished by air, the arc extinguishing effect is better, which improves the safety and reliability of the opening operation of the vacuum parallel switch device. As the transmission component 310 pulls the moving contact 230 and the stationary contact 220 to gradually separate, the first latch 3111 on the transmission component 310 gradually approaches the second latch 322 until the moving contact 230 and the stationary contact 220 are completely separated (the moving contact 230 moves to a distance from the stationary contact 220 that is within the specified opening distance). At this point, the first latch 3111 and the second latch 322 lock together. Afterwards, the isolating switch 400 continues to rotate and will separate from the transmission component 310. That is, after the first latch 3111 and the second latch 322 are locked, the transmission component 310 remains stationary, thus keeping the moving contact 230 and the stationary contact 220 separated. This achieves the opening and holding of the vacuum arc-extinguishing mechanism 200, ensuring that both the vacuum arc-extinguishing mechanism 200 and the transmission component 310 are in a high-voltage suspended state. Furthermore, under the action of the first elastic element 330, the reliability of the locking between the first latch 3111 and the second latch 322 is relatively good.

[0034] As the isolating switch 400 rotates along the second rotation direction to approach and engage with the isolating contact 100, due to the locking of the first latch 3111 and the second latch 322, the isolating switch 400 will never contact the transmission member 310. Furthermore, the isolating switch 400 will first engage with the isolating contact 100, and then, as the isolating switch 400 continues to rotate, it will contact the tripping member 310 and drive the tripping member 310 to move, causing the tripping member 340 to slide. As the sliding member 320 moves away from the first latch 3111, the second latch 322 on the sliding member 320 separates from the first latch 3111. After the second latch 322 separates from the first latch 3111, the moving contact 230 gradually approaches the stationary contact 220 under the action of self-closing force and eventually engages with the stationary contact 220. During the engagement of the moving contact 230 and the stationary contact 220, the transmission member 310 is driven to rotate, returning to its initial position for the next opening. That is, the opening state of the vacuum arc-extinguishing mechanism 200 is not released until the isolating switch 400 engages with the isolating contact 100. With this configuration, when the isolating switch 400 rotates to a position close to the vacuum arc-extinguishing mechanism 200 during the closing operation, there will be no discharge between the isolating switch 400 and the vacuum arc-extinguishing mechanism 200 because the vacuum arc-extinguishing mechanism 200 is in the opening state, thus improving the safety and reliability of closing.

[0035] The vacuum arc extinguishing mechanism 200 is kept open by locking the first latch 3111 and the second latch 322, and the first latch 3111 and the second latch 322 are unlocked by the cooperation of the isolating switch 400 and the tripping component 340. The control is convenient and smooth, reducing the risk of the vacuum arc extinguishing mechanism 200 failing to close, and the structure is simple.

[0036] Understandably, when the tripping member 340 is not pushed by the isolating switch 400, the sliding member 320 will be pulled towards the first latch 3111 under the action of the first elastic member 330, so that the second latch 322 moves to the ready position to lock with the first latch 3111. When the first latch 3111 and the second latch 322 are locked, the position of the second latch 322 remains unchanged, thereby ensuring the reliability of the locking of the first latch 3111 and the second latch 322.

[0037] It is understandable that the first elastic element 330 can be, but is not limited to, a tension spring.

[0038] It is understood that, in one possible embodiment, the isolating switch 400 may first contact the tripping member 340 and drive the tripping member 340 to move during its rotation in the second rotation direction. However, it must be ensured that the second latch 322 remains locked to the first latch 3111 before the isolating switch 400 engages with the isolating contact 100. That is, the unlocking of the second latch 322 from the first latch 3111 must occur after the isolating switch 400 engages with the isolating contact 100.

[0039] Understandably, since the transmission component 310 serves to transfer current, it needs to be made of a conductive material. However, because the transmission component 310 is hinged to the moving contact 230, the contact area between the transmission component 310 and the moving contact 230 may constantly change during the rotation of the transmission component 310 pulling the moving contact 230, which can affect the stability of the current. Based on this, see [further details omitted]. Figure 1 The transmission component 310 is provided with a first latch 3111 at one end, which can be electrically connected to the moving contact 230 via a wire 350. With this configuration, even if the contact area between the transmission component 310 and the moving contact 230 changes, the current can still flow stably through the wire 350, thus ensuring the stability of the current.

[0040] Optionally, the transmission component 310 can be rotatably connected to the insulating housing 210 via a fixing pin, or the transmission component 310 can be hinged to the moving contact 230 via a fixing pin. See also Figure 1 In this embodiment, the transmission component 310 rotates around point a.

[0041] Further, see also Figures 1-3The other end of the transmission component 310 is provided with a locking block 311. The first locking buckle 3111 is a slot provided on the locking block 311. The side wall of the locking block 311 near the sliding component 320 is provided with a first arc surface 3112, which is smoothly connected to the slot. The second locking buckle 322 is a protrusion provided at one end of the sliding component 320. The sliding component 320 is also provided with a guide block 326. The side wall of the guide block 326 near the locking block 311 is provided with a second arc surface 3261, which is smoothly connected to the protrusion.

[0042] Specifically, as the end of the transmission member 310 equipped with the locking block 311 rotates towards the sliding member 320 under the push of the isolating knife gate 400 (during the rotation of the transmission member 310 in the counterclockwise direction), the first arc surface 3112 will first contact the second arc surface 3261. As the transmission member 310 rotates further, the first arc surface 3112 slides against the second arc surface 3261, and the locking block 311 can apply a force away from itself to the sliding member 320, causing the sliding member 320 to move away from the first locking buckle 3111 (horizontally to the right). When the locking block 311 moves to its position, the first arc surface 3112 separates from the second arc surface 3261 and removes the pushing force applied to the sliding member 320. At this time, the sliding member 320 approaches the locking block 311 under the pulling force of the first elastic member 330, so that the locking protrusion enters the locking groove.

[0043] The locking of the first latch 3111 and the second latch 322 is achieved through the cooperation of the slot and the protrusion, which is simple in structure and easy to manufacture. In addition, the design of the first arc surface 3112 and the second arc surface 3261 can reduce the resistance between the locking block 311 and the sliding member 320, which is conducive to improving the smoothness of locking between the first latch 3111 and the second latch 322.

[0044] Further, see also Figures 1-3 The insulating outer shell 210 is provided with a support arm 211, and the support arm 211 is provided with a slide rail (not shown in the figure). The sliding member 320 includes a sliding frame 321, and the sliding frame 321 is provided with a sliding groove 3211, which is slidably connected to the slide rail. The sliding assembly of the sliding member 320 and the insulating outer shell 210 is realized by the cooperation between the sliding groove 3211 on the sliding frame 321 and the slide rail. The structure is simple and the sliding is smooth. Optionally, in this embodiment, the slide rail extends in the horizontal direction.

[0045] Optionally, see [link to relevant documentation] Figures 1-3 The sliding frame 321 has a second latch 322 at one end in the sliding direction and a connecting beam 323 at the other end in the sliding direction. The connecting beam 323 is connected to the release element 340. This sliding element has a simple structure and is easy to process and assemble.

[0046] Optionally, see [link to relevant documentation] Figure 2In the second latch 322 being a latching protrusion, the latching protrusion extends along the sliding direction perpendicular to the sliding frame 321.

[0047] Further, see also Figures 1-3 The support arm 211 is provided with a guide groove 2111 communicating with the slide rail, and the sliding frame 321 is provided with a guide arm 324, the end of which is slidably connected to the guide groove 2111. Specifically, the guide arm 324 can abut against the two opposite groove walls of the guide groove 2111 along its own extension direction. That is, through the cooperation of the guide arm 324 and the guide groove 2111, the sliding of the sliding member 320 can be guided, and the sliding stroke of the sliding member 320 can be limited.

[0048] Understandably, it can be configured that when the guide arm 324 abuts against the guide groove 2111 and approaches the groove wall of the first latch 3111, the first latch 3111 and the second latch 322 are locked together; when the guide arm 324 abuts against the guide groove 2111 and moves away from the groove wall of the first latch 3111, the second latch 322 moves to the furthest distance from the first latch 3111, at which point the isolating switch 400 rotates into position.

[0049] Optionally, in this embodiment, multiple guide arms 324 are provided, and the multiple guide arms 324 are spaced apart along a sliding direction perpendicular to the sliding frame 321. By providing multiple guide arms 324, it is beneficial to improve both the stability of the sliding frame 321's movement and the structural strength of the sliding frame 321.

[0050] Optionally, see [link to relevant documentation] Figures 1-3 The sliding frame 321 is provided with a connecting part 325. One end of the first elastic member 330 is connected to the connecting part 325, and the other end of the first elastic member 330 is connected to the insulating shell 210. The first elastic member 330 is fixed by the connecting part 325 and the insulating shell 210, which has a simple structure and is easy to assemble.

[0051] Further, see also Figure 2 In one possible embodiment, the sliding frame 321 has connecting portions 325 on both opposite sides of the end where the second latch 322 is located, and each connecting portion 325 is provided with a first elastic member 330. By providing connecting portions 325 on both opposite sides of the sliding frame 321 and using two first elastic members 330 to pull the sliding frame 321, the uniformity of force on the sliding member 320 is improved, thereby enhancing the smoothness and stability of the sliding frame 321.

[0052] In this embodiment, the sliding direction of the sliding frame 321 is its own length direction, and the connecting part 325 is provided at opposite ends in the width direction of the sliding frame 321.

[0053] Optionally, in this embodiment, the connecting portion 325 includes a first shaft segment connected to the sliding frame 321 and a second shaft segment connected to the first shaft segment. The diameter of the second shaft segment is larger than the diameter of the first shaft segment, and one end of the first elastic member 330 is hung on the first shaft segment. With this configuration, the second shaft segment and the sliding frame 321 can stop the first elastic member 330, improving the reliability of the connection between the first elastic member 330 and the connecting portion 325.

[0054] Further, see also Figures 1-3 The tripping component 340 includes a first tripping component 341 and a second tripping component 342. Specifically, both the first tripping component 341 and the second tripping component 342 are rotatably connected to the isolating contact 100. One end of the first tripping component 341 is movably connected to the sliding member 320, and the other end slides against the first end of the second tripping component 342. The second end of the second tripping component 342 is used to cooperate with the isolating switch 400.

[0055] See also Figure 1 In this embodiment, the first release member 341 rotates around point b, and the second release member 342 rotates around point c.

[0056] The working principle of the sliding component 320, the first release component 341, and the second release component 342 is as follows: During the rotation of the isolating switch 400 in the second rotation direction, it first engages with the isolating contact 100, and then continues to rotate to contact the second end of the second tripping member 342, pushing the second tripping member 342 to rotate around point c. This causes the first end of the second tripping member 342 to drive the first tripping member 341 to rotate around point b, thereby causing the first tripping member 341 to pull the sliding member 320 away from the first latch 3111. The movement of the sliding member 320 away from the first latch 3111 allows the second latch 322 on the sliding member 320 to separate from the first latch 3111. Afterwards, the moving contact 230 engages with the stationary contact 220 under the action of the self-closing force, and pulls the transmission member 310 to rotate, returning the transmission member 310 to its initial position for the next tripping operation.

[0057] It is understandable that during the rotation of the isolating switch 400 in the second rotation direction, it may first contact the second tripping member 342 and then engage with the isolating contact 100. However, it is necessary to ensure that after the isolating switch 400 engages with the isolating contact 100, the second tripping member 342 will drive the second latch 322 on the sliding member 320 to separate from the first latch 3111 through the first tripping member 341. This ensures that the isolating switch 400 engages with the isolating contact 100 first, and then the vacuum arc extinguishing mechanism 200 closes.

[0058] Optionally, see [link to relevant documentation] Figure 2In this embodiment, one end of the first release member 341 movably abuts against the connecting beam 323 and can pull the connecting beam 323 to move by rotation. The cooperation between the first release member 341 and the connecting beam 323 allows the first release member 341 to slide by rotating the sliding frame 321, which has a simple structure and is easy to assemble.

[0059] Further, see also Figure 2 and Figure 3 Two first tripping members 341 are provided, and the two first tripping members 341 are respectively disposed on opposite sides of the isolating contact 100. The second tripping member 342 includes two tripping arms 3422 and an unlocking part 3421 connecting the two tripping arms 3422. The two tripping arms 3422 are respectively disposed on opposite sides of the isolating contact 100 and are rotatably connected to the isolating contact 100. The tripping arms 3422 are respectively disposed in correspondence with the first tripping members 341. The other end of the first tripping member 341 slides against the corresponding tripping arm 3422. The unlocking part 3421 is close to the isolating switch 400 and is used to cooperate with the isolating switch 400. By setting two first tripping elements 341 and two tripping arms 3422 that cooperate with the first tripping elements 341, on the one hand, the uniformity of force on the sliding element 320 can be improved, thereby improving the stability and smoothness of the sliding element 320; on the other hand, the reliability of force transmission between the second tripping element 342 and the first tripping element 341 can be improved, thereby improving the reliability of unlocking between the second latch 322 and the first latch 3111; furthermore, both the first tripping element 341 and the second tripping element 342 can be made of insulating material, so that the first tripping element 341 and the second tripping element 342 can provide insulation protection for the isolating contact 100.

[0060] Optionally, the second release element 342 is an integral structure, which is easy to process and has high structural stability.

[0061] Optionally, the second release member 342 is connected to the second elastic member (not shown in the figure), the second release member 342 has a clearance position and a release position, and the second elastic member is configured to always have a tendency to push the second release member 342 from the release position to the clearance position.

[0062] Specifically, when the second release element 342 is in the avoidance position (e.g.) Figures 5-7As shown), the second latch 322 can be locked with the first latch 3111. That is, at this time, the second release member 342 will not hinder the movement of the first release member 341. In this embodiment, when the second release member 342 is in the avoidance position, the first release member 341 can rotate clockwise around point b when the sliding member 320 is pulled to the left by the first elastic member 330; during the rotation of the isolating knife switch 400 along the second rotation direction, it can drive the second release member 342 to rotate from the avoidance position to the release position. When the second release member 342 is in the release position (e.g. Figure 1 As shown), the slider 320 drives the second latch 322 to move to a position where it is separated from the first latch 3111.

[0063] That is, the second elastic element plays the role of driving the second release element 342 to reset, so as to prevent the second release element 342 from hindering the rotation of the first release element 341 and causing the sliding element 320 to be unable to slide towards the first latch 3111 under the pull of the first elastic element 330.

[0064] Optionally, the second elastic element can be a torsion spring. The helical portion of the torsion spring can be fitted onto the fixing pin that rotatably connects the second tripping member 342 and the isolating contact 100. The first torsion arm of the torsion spring can abut against the isolating contact 100, and the second torsion arm can abut against the second tripping member 342.

[0065] Optionally, see [link to relevant documentation] Figure 1 The vacuum parallel switch device also includes a third elastic element 500, one end of which is connected to the transmission element 310 and the other end is connected to the insulating housing 210. The third elastic element 500 is configured to always have a tendency to push the first latch 3111 to rotate away from the second latch 322. Specifically, when the first latch 3111 on the transmission member 310 rotates towards the second latch 322, the transmission member 310 will compress the third elastic member 500. At this time, the third elastic member 500 accumulates elastic potential energy. When the second latch 322 disengages from the first latch 3111, the third elastic member 500 will release elastic potential energy to push the transmission member 310 to rotate in the opposite direction. The rotation of the transmission member 310 will push the moving contact 230 to engage with the stationary contact 220. That is, the moving contact 230 is simultaneously subjected to the self-closing force and the pushing force of the transmission member 310, which improves the reliability of the engagement between the moving contact 230 and the stationary contact 220 and reduces the risk of the vacuum arc extinguishing mechanism 200 failing to close.

[0066] It is understandable that the third elastic element 500 is optional but not limited to a compression spring.

[0067] Further, see also Figures 1-3The other end of the transmission component 310 is provided with a first conductive support arm 327 and a second conductive support arm 328. Elastic conductive elements (not shown in the figure) are provided on opposite sides of the first conductive support arm 327. The isolating switch 400 includes two spaced-apart conductive plates (not shown in the figure), with each conductive plate corresponding to one of the elastic conductive elements.

[0068] Specifically, during the rotation of the isolating switch 400 in the first rotation direction, the conductive plate first slides and electrically connects to its corresponding elastic conductive element until the conductive plate separates from the isolating contact 100. During this process, the isolating switch 400, through its electrical connection with the elastic conductive element, gradually transfers current to the vacuum arc-extinguishing mechanism 200 via the transmission component 310. When the isolating switch 400 separates from the isolating contact 100, all current is transferred to the vacuum arc-extinguishing mechanism 200. That is, the process of the conductive plate sliding and electrically connecting to the elastic conductive element is the process of current transfer, while ensuring that the distance between the isolating switch 400 and the isolating contact 100 is a safe distance, preventing the isolating switch 400 from conducting with the isolating contact 100 due to discharge. It is worth noting that the transmission component 310 does not rotate during this process, and the moving contact 230 and the stationary contact 220 remain engaged.

[0069] After the current is completely transferred and the distance between the isolating switch 400 and the isolating contact 100 is a safe distance, the two conductive plates simultaneously contact the second conductive arm 328, and the second conductive arm 328 pushes the transmission component 310 to rotate, so that the transmission component 310 drives the moving contact 230 to separate from the stationary contact 220.

[0070] Understandably, during the engagement of the isolating switch 400 and the first conductive arm 327, the first conductive arm 327 is sandwiched between two conductive plates. Therefore, by designing the distance between the two conductive plates, the conductive plates can apply a certain pressure to the elastic conductive element, and the elastic force of the elastic conductive element can ensure the reliability of the electrical connection between the conductive plate and the elastic conductive element. Furthermore, the elastic conductive element can also impede the movement of the conductive plates, preventing them from moving too quickly and ensuring the stability of current transfer.

[0071] Understandably, the length of the flexible conductive element can be designed based on the safe distance between the isolating switch 400 and the isolating contact 100.

[0072] Optionally, see [link to relevant documentation] Figure 3 Grooves 3271 can be provided on opposite sides of the first conductive support arm 327 to install the elastic conductive element in the grooves 3271.

[0073] Optionally, in one possible embodiment, the elastic conductive element is a watch strap finger, and two conductive plates with contacts (not shown in the figure) are provided on opposite surfaces of the plates, and the contacts are slidably electrically connected to the watch strap finger.

[0074] Further, see also Figure 1 , Figure 3 and Figure 6 The second conductive support arm 328 is rotatably connected to the transmission member 310. The second conductive support arm 328 has a first working position and a second working position. During the process of the two conductive plates cooperating with the second conductive support arm 328, the second conductive support arm 328 can be driven to rotate from the first working position to the second working position. The second conductive support arm 328 is connected to the fourth elastic member (not shown in the figure). The fourth elastic member is configured to always have the tendency to push the second conductive support arm 328 to rotate from the second working position to the first working position.

[0075] That is, when the isolating switch 400 is not in contact with the second conductive arm 328, the second conductive arm 328 will remain in the first working position under the action of the fourth elastic element. When the isolating switch 400 contacts the second conductive arm 328, as the isolating switch 400 rotates further in the first rotation direction, the isolating switch 400 will push the second conductive arm 328 to rotate from the first working position to the second working position. At the same time, driven by the second conductive arm 328, the transmission element 310 will also rotate, causing the first latch 3111 to move closer to the second latch 322. When the second conductive arm 328 rotates to the second working position, the vacuum arc-extinguishing mechanism 200 completes the opening, and the first latch 3111 and the second latch 322 are locked. Subsequently, as the isolating switch 400 rotates further along the first rotation direction, the isolating switch 400 will separate from the second conductive support arm 328. At this time, the second conductive support arm 328 will rotate from the second working position to the first working position under the action of the fourth elastic element, so as to avoid the isolating switch 400 from contacting the second conductive support arm 328 during the process of rotating along the second rotation direction and contacting the isolating contact 100.

[0076] Optionally, the fourth elastic element can be a torsion spring. The helical part of the torsion spring can be sleeved on the rotating shaft of the second conductive support arm 328. The first torsion arm of the torsion spring can abut against the transmission member 310, and the second torsion arm can abut against the second conductive support arm 328.

[0077] Optionally, see [link to relevant documentation] Figure 1 The isolating switch 400 is connected to the isolating spindle 20, which drives the isolating switch 400 to rotate. An insulating protective cover 600 is installed over the isolating spindle 20 and part of the isolating switch 400. The insulating protective cover 600 can strengthen the insulation and reduce the discharge risk of the isolating switch 400.

[0078] In this embodiment, during the rotation of the isolating switch 400 in the second rotation direction, the insulating protective cover 600 will contact the second tripping member 342 and push the second tripping member 342 to rotate, so that the second tripping member 342 drives the first tripping member 341 to rotate, so that the first tripping member 341 drives the sliding member 320 to slide away from the first latch 3111, thereby causing the second latch 322 to separate from the first latch 3111.

[0079] To facilitate understanding, the working process of this vacuum parallel switch device will be briefly described below: Opening process: like Figure 1 As shown, the isolating switch 400 is engaged with the isolating contact 100, the main circuit is connected, the vacuum arc extinguishing mechanism 200 is in the closed state, the isolating switch 400 abuts against the unlocking part 3421 to limit the second tripping member 342, so that the second tripping member 342 is held in the tripping position, thereby keeping the second latch 322 in the position separated from the first latch 3111; like Figure 4 As shown, the isolating switch 400 rotates counterclockwise under the drive of the isolating spindle 20 until the conductive plate of the isolating switch 400 just contacts the elastic conductive element on the first conductive support arm 327. At this time, part of the isolating switch 400 still remains in contact with the isolating contact 100, and part of the current in the main circuit is transferred to the vacuum arc extinguishing mechanism 200 to form a parallel circuit. Furthermore, during this process, the isolating switch 400 gradually moves away from the second tripping element 342. Therefore, the second latch 322 will move to the left under the pull of the first elastic element 330, and at the same time, the second tripping element 342 will rotate to the avoidance position under the action of the second elastic element. like Figure 5 As shown, as the isolating switch 400 rotates further counterclockwise, the conductive plate of the isolating switch 400 slides electrically connected to the elastic conductive element on the first conductive support arm 327 until the isolating switch 400 is completely separated from the isolating contact 100. At this time, the main circuit current is completely transferred to the vacuum arc-extinguishing mechanism 200 branch, completing the current transfer. Furthermore, during this process, the second latch 322 continues to move to the left under the pull of the first elastic element 330 until the isolating switch 400 separates from the unlocking part 3421. When the first elastic element 330 has no elastic deformation, the second latch 322 no longer moves to the left. At this time, the second arc surface 3261 can contact the first arc surface 3112 or not, depending on actual needs. It is worth noting that during the process of the main circuit current transferring to the vacuum arc-extinguishing mechanism 200 branch, the transmission element 310 remains stationary, that is, the vacuum arc-extinguishing mechanism 200 remains in a closed state. like Figure 6As shown, as the isolating switch 400 rotates further counterclockwise, the conductive plate of the isolating switch 400 contacts the second conductive support arm 328, pushing the second conductive support arm 328 to rotate from the first working position to the second working position. Simultaneously, driven by the second conductive support arm 328, the transmission member 310 rotates counterclockwise. This counterclockwise rotation of the transmission member 310 compresses the third elastic member 500 and causes the first latch 3111 to press the second latch 322, forcing the second latch 322 to move to the right until the conductive plate of the isolating switch 400 contacts the second conductive support arm 328. When the second conductive arm 328 separates, the first latch 3111 rotates to the position, the first arc surface 3112 separates from the second arc surface 3261, and the second latch 322 is engaged with the first latch 3111 under the action of the first elastic element 330. At this time, the moving contact 230 and the stationary contact 220 are separated, the vacuum arc extinguishing mechanism 200 is opened, and the arc generated by the opening is extinguished under the action of vacuum. The vacuum parallel switch device is opened, and the second conductive arm 328 rotates from the second working position to the first working position under the action of the fourth elastic element. like Figure 7 As shown, as the isolating switch 400 rotates further counterclockwise, the first latch 3111 will remain locked with the second latch 322, so that the vacuum arc extinguishing mechanism 200 remains in the open state.

[0080] Closing process: like Figure 8 As shown, the isolating switch 400 rotates clockwise under the action of the isolating spindle 20, gradually approaching the isolating contact 100. During this process, the isolating switch 400 will never contact the first conductive arm 327 and the second conductive arm 328. In addition, before engaging with the isolating contact 100, the isolating switch 400 may contact the second tripping member 342 and drive the second tripping member 342 to start rotating towards the tripping position, or it may not contact the second tripping member 342. like Figure 9 As shown, as the isolating switch 400 rotates further clockwise, it begins to engage with the isolating contact 100. The isolating switch 400 also pushes the second tripping member 342 to rotate towards the tripping position. During the rotation of the second tripping member 342 towards the tripping position, it pushes the first tripping member 341 to rotate counterclockwise. The counterclockwise rotation of the first tripping member 341 pulls the sliding member 320 to the right, causing the second latch 322 on the sliding member 320 to move to the right and separate from the first latch 3111. After the first latch 3111 disengages from the second latch 322, the transmission member 310 will return to its initial position under the action of the elastic force of the third elastic member 500 and the self-closing force of the moving contact 230, so as to open the circuit next time. The moving contact 230 will engage with the stationary contact 220 until the isolating switch 400 rotates to the position, and the vacuum parallel switch device is closed.

[0081] This embodiment also provides a switching device, including a cabinet and the aforementioned vacuum parallel switch device, wherein the vacuum parallel switch device is disposed inside the cabinet.

[0082] Because this switchgear uses the aforementioned vacuum parallel switch device, its opening and closing operations have better safety and reliability.

[0083] Optionally, see [link to relevant documentation] Figure 1 In this embodiment, the two ends of the main busbar 10 are installed on the side wall of the cabinet through sleeves 30.

[0084] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A vacuum parallel switching device, characterized in that, include: Isolation contacts; The isolating switch is rotatable in a first rotational direction to disengage from the isolating contact, and rotatable in a second rotational direction to engage with the isolating contact; A vacuum interrupting mechanism includes an insulating shell and a vacuum interrupting chamber installed inside the insulating shell. The vacuum interrupting chamber is provided with a stationary contact and a moving contact, and the stationary contact is electrically connected to the isolating contact. The transmission mechanism includes a transmission component, a sliding component, a first elastic component, and a release component. The transmission component is rotatably connected to the insulating housing. One end of the transmission component is hinged to the moving contact, and the other end is provided with a first latch. The sliding component is slidably assembled to the insulating housing and is provided with a second latch. The first elastic component is configured to always have a tendency to pull the sliding component closer to the first latch. One end of the release component is connected to the sliding component, and the release component can pull the sliding component away from the first latch when driven. During the rotation of the isolating switch along the first rotation direction, it can contact the transmission component and drive the transmission component to rotate. This causes the transmission component to gradually separate the moving contact from the stationary contact while also causing the first latch to gradually approach the second latch. After the moving contact and the stationary contact are separated, the first latch is locked to the second latch, so that the transmission component keeps the moving contact and the stationary contact separated. During the rotation of the isolating switch along the second rotation direction, it first engages with the isolating contact, and then continues to rotate to contact the tripping member and drive the tripping member to move, so that the tripping member pulls the sliding member away from the first latch, thereby causing the second latch to separate from the first latch.

2. The vacuum parallel switch device according to claim 1, characterized in that, The other end of the transmission component is provided with a locking block. The first latch is a slot provided on the locking block. The side wall of the locking block near the sliding component is provided with a first arc surface, which is smoothly connected to the slot. The second latch is a latching protrusion located at one end of the sliding member. The sliding member is provided with a guide block, and the guide block has a second arc surface on its side wall near the locking block. The second arc surface is smoothly connected to the latching protrusion. As the locking block rotates toward the sliding member, the first arc surface can cooperate with the second arc surface to push the sliding member away from the slot until the slot is in place. Then, the first elastic member pulls the sliding member to make the card protrusion engage in the slot.

3. The vacuum parallel switch device according to claim 1, characterized in that, The insulating shell is provided with a support arm, the support arm is provided with a slide rail, the sliding element includes a sliding frame, the sliding frame is provided with a sliding groove, and the sliding groove is slidably connected to the slide rail; The sliding frame is provided with a second latch at one end in the sliding direction, and a connecting beam at the other end in the sliding direction, which is connected to the release element.

4. The vacuum parallel switch device according to claim 3, characterized in that, The support arm is also provided with a guide groove, which is connected to the slide rail. The sliding frame is provided with a guide arm, and the end of the guide arm is slidably connected to the guide groove. And / or, the sliding frame is provided with a connecting part, one end of the first elastic member is connected to the connecting part, and the other end is connected to the insulating shell.

5. The vacuum parallel switching device according to any one of claims 1-4, characterized in that, The tripping component includes a first tripping component and a second tripping component. Both the first tripping component and the second tripping component are rotatably connected to the isolating contact. One end of the first tripping component is movably connected to the sliding component, and the other end slides against the first end of the second tripping component. The second end of the second tripping component is used to cooperate with the isolating switch. During the rotation of the isolating switch along the second rotation direction, it can contact the second end of the second tripping member and push the second tripping member to rotate, so that the first end of the second tripping member drives the first tripping member to rotate, thereby causing the first tripping member to pull the sliding member away from the first latch.

6. The vacuum parallel switch device according to claim 5, characterized in that, There are two first tripping components, which are respectively located on opposite sides of the isolating contact; The second tripping component includes two tripping arms and an unlocking part connecting the two tripping arms. The two tripping arms are respectively disposed on opposite sides of the isolating contact and are rotatably connected to the isolating contact. The tripping arms are arranged in a one-to-one correspondence with the first tripping component. The other end of the first tripping component slides against the tripping arm corresponding to it. The unlocking part is close to the isolating switch and is used to cooperate with the isolating switch.

7. The vacuum parallel switch device according to claim 5, characterized in that, The second tripping member is connected to the second elastic member. The second tripping member has a clearance position and a tripping position. The second elastic member is configured to always have a tendency to push the second tripping member to rotate from the tripping position to the clearance position. When the second tripping member is in the clearance position, the second latch can lock with the first latch. During the rotation of the isolating knife switch along the second rotation direction, it can drive the second tripping member to move from the clearance position to the tripping position, so that the second tripping member drives the first tripping member to rotate, thereby causing the first tripping member to pull the sliding member away from the first latch.

8. The vacuum parallel switching device according to any one of claims 1-4, characterized in that, The end of the transmission component with the first latch is electrically connected to the moving contact via a wire.

9. The vacuum parallel switching device according to any one of claims 1-4, characterized in that, The vacuum parallel switch device further includes a third elastic element, one end of which is connected to the transmission element and the other end of which is connected to the insulating shell. The third elastic element is configured to always have a tendency to push the first latch to rotate away from the second latch.

10. The vacuum parallel switching device according to any one of claims 1-4, characterized in that, The other end of the transmission component is provided with a first conductive arm and a second conductive arm, and elastic conductive elements are provided on opposite sides of the first conductive arm. The isolating switch includes two spaced-apart conductive plates, each corresponding to one of the elastic conductive elements. During the rotation of the isolating switch in the first rotation direction, the conductive plates first slide electrically connected to their corresponding elastic conductive elements until they separate from the isolating contacts. Then, both conductive plates simultaneously contact the second conductive arm and push the transmission element to rotate through the second conductive arm.

11. The vacuum parallel switching device according to claim 10, characterized in that, The second conductive arm is rotatably connected to the transmission component. The second conductive arm has a first working position and a second working position. During the process of the two conductive plates cooperating with the second conductive arm, the second conductive arm can be driven to rotate from the first working position to the second working position. The second conductive arm is connected to a fourth elastic element, which is configured to always have the tendency to push the second conductive arm to rotate from the second working position to the first working position.

12. A switchgear, characterized in that, It includes a cabinet and a vacuum parallel switch device according to any one of claims 1-11, wherein the vacuum parallel switch device is disposed in the cabinet.

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