Vacuum parallel switch device and switchgear

Abstract

The present application relates to the technical field of switch device, and discloses a vacuum parallel switch device and 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 member, a lock holding member and a first elastic member, and the lock holding member comprises a locking portion and an unlocking portion. The isolation knife switch can rotate in a first rotation direction to be separated from the isolation contact, and in the process, the transmission member is driven to rotate, so that the transmission member drives the first lock catch to gradually approach the second lock catch while driving the moving contact and the static contact to gradually separate. 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 rotation direction to be engaged with the isolation contact, and after being engaged with the isolation contact, the isolation knife switch continues to rotate to push the unlocking portion to move, so that the unlocking portion drives the second lock catch to be separated from the first lock catch. The safety of the opening and closing operation of the vacuum parallel switch device is better.

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:

[0007] Vacuum parallel switching device, including:

[0008] Isolation contacts;

[0009] 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;

[0010] 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.

[0011] The transmission mechanism includes a transmission component, a locking component, and a first elastic 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 locking component includes a locking part and an unlocking part. The locking part is slidably assembled to the insulating housing, and the locking part is provided with a second latch. The first elastic component is configured to always have a tendency to pull the locking part closer to the first latch. One end of the unlocking part is connected to the locking part, and the unlocking part can pull the locking part away from the first latch when driven.

[0012] 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.

[0013] As the isolating switch rotates along the second rotation direction, it first engages with the isolating contact, and then continues to rotate to contact the unlocking part and drive the unlocking part to move, so that the unlocking part pulls the locking part away from the first latch, thereby separating the second latch from the first latch.

[0014] Optionally, the other end of the transmission member is provided with a transmission head, the transmission head is provided with a first arc surface, the first arc surface is close to the locking part, a first slot is provided on one side of the first arc surface, and the first arc surface and the first slot form a hook-shaped first latch.

[0015] The locking part is provided with a second arc surface, which is close to the transmission head. A second slot is provided on one side of the second arc surface, and the second arc surface and the second slot form a hook-shaped second latch.

[0016] As the transmission head rotates toward the locking part, the first arc surface can cooperate with the second arc surface to push the locking part away from the first latch until the first latch moves into place, at which point the first elastic element pulls the second latch to lock with the first latch.

[0017] Optionally, the insulating housing is provided with a mounting arm extending toward the isolating contact, the lower surface of the mounting arm is provided with a slide rail, the opposite sides of the mounting arm are provided with baffles, the slide rail is located between the two baffles, the top of the locking part is provided with a slider, the slider is provided with a slide groove that slides with the slide rail, and the opposite sides of the slider are slidably attached to the two baffles respectively.

[0018] And / or, one end of the first elastic member is connected to the locking part, and the other end is connected to the insulating shell.

[0019] Optionally, connecting rods are connected to opposite sides of the locking part. The ends of the two connecting rods away from the locking part are bent and connected by an unlocking rod. The unlocking rod is the unlocking part that cooperates with the isolating switch. During the rotation of the isolating switch in the second rotation direction, it enters between the two connecting rods and pushes the unlocking rod to move.

[0020] Optionally, the vacuum parallel switch device further includes two insulating partitions, which are respectively connected to opposite sides of the insulating shell to form a protective space. The vacuum arc extinguishing mechanism, the transmission mechanism, and the isolating contact are all located within the protective space. At least one of the insulating partitions is provided with a guide hole, and a protrusion that slides with the guide hole is provided on the connecting rod near the insulating partition.

[0021] Optionally, the vacuum parallel switch device further includes a second 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 second elastic element is configured to always have a tendency to push the first latch to rotate away from the second latch.

[0022] Optionally, the other end of the transmission component is provided with a first conductive arm and two second conductive arms. The first conductive arm is provided with elastic conductive elements on opposite sides, and the two second conductive arms are respectively provided on opposite sides of the transmission component and close to the first conductive arm.

[0023] The isolating switch includes two spaced-apart conductive plates. The conductive plates, the elastic conductive element, and the second conductive arm are correspondingly arranged. During the rotation of the isolating switch along the first rotation direction, the conductive plate first slides and is electrically connected to the corresponding elastic conductive element until it is separated from the isolating contact. After that, the conductive plate will contact the corresponding second conductive arm and push the transmission element to rotate through the second conductive arm.

[0024] Optionally, the elastic conductive element is a watch strap finger, and the two conductive plates have contact points on their opposite surfaces, the contact points being slidably electrically connected to the watch strap finger.

[0025] Optionally, the isolating switch is connected to the isolating spindle, the isolating spindle is used to drive the isolating switch to rotate, and an insulating protective cover is provided over the isolating spindle and part of the isolating switch.

[0026] 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.

[0027] The beneficial effects of this invention are as follows:

[0028] 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 to gradually separate from the stationary contact, 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 have 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 latch and the second latch are locked together. The locking of the first latch and the second latch will keep the transmission component stationary, thereby causing the transmission component to drive the moving contact to keep the stationary contact separated, so as to realize the opening and holding 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.

[0029] 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 unlocking part. The control is convenient, smooth and simple.

[0030] 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.

[0031] 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

[0032] Figure 1 This is a schematic diagram of the structure of the vacuum parallel switch device provided in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram illustrating the cooperation between the locking member and the insulating shell provided in an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram illustrating the cooperation between the insulating partition and the locking member provided in an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of the locking member provided in an embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the vacuum arc-extinguishing mechanism provided in an embodiment of the present invention;

[0037] Figure 6 This is a schematic diagram illustrating the cooperation between the isolating switch and the transmission component according to an embodiment of the present invention;

[0038] Figure 7 for Figure 1 Enlarged view at point A;

[0039] Figures 8-12 This is a schematic diagram of the opening process of the vacuum parallel switch device provided in an embodiment of the present invention;

[0040] Figures 13-15 A schematic diagram of the closing process of the vacuum parallel switch device provided in an embodiment of the present invention.

[0041] In the picture:

[0042] 10. Main busbar; 20. Isolation spindle; 30. Bushing; 40. Cabinet;

[0043] 100. Isolation contacts;

[0044] 200. Vacuum arc-extinguishing mechanism; 210. Insulating housing; 211. Mounting arm; 2111. Slide rail; 2112. Baffle; 220. Stationary contact; 230. Moving contact;

[0045] 300. Transmission mechanism; 301. Transmission head; 3011. First arc surface; 3012. First slot; 310. Transmission component; 311. First latch; 312. First conductive support arm; 313. Second conductive support arm; 314. Elastic conductive component; 320. Locking component; 321. Locking part; 3211. Second latch; 32111. Second arc surface; 32112. Second slot; 3212. Slider; 32121. Slide groove; 322. Unlocking part; 323. Connecting rod; 3231. Protrusion; 324. Unlocking rod; 330. First elastic component;

[0046] 400. Isolating switch; 410. Conductive plate; 411. Contact;

[0047] 500. Insulating partition; 510. Guide hole;

[0048] 600. Second elastic element;

[0049] 700. Insulating protective cover. Detailed Implementation

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] Specifically, such as Figures 1-15 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.

[0056] 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.

[0057] 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 has 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 through the isolating switch 400, and the vacuum arc-extinguishing mechanism 200 extinguishes the arc generated during opening, ensuring operational safety 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 other methods, 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.

[0058] The transmission mechanism 300 includes a transmission member 310, a locking member 320, and a first elastic member 330. 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 311. Rotating the other end of the transmission member 310 causes it to rotate, enabling the hinged end of the transmission member 310 to move the moving contact 230 away from the stationary contact 220, thus opening the vacuum arc-extinguishing mechanism 200. The locking member 320 includes a locking part 321 and an unlocking part 322 connected to the locking part 321. The locking part 321 is provided with a second latch 3211 and is slidably mounted on the insulating housing 210. The first elastic member 330 is configured to always tend to pull the locking part 321 closer to the first latch 311. The unlocking part 322 can pull the locking part 321 away from the first latch 311 when driven.

[0059] The working principle of this vacuum parallel switch device is as follows:

[0060] 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 311, 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 1 The 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 reliably 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 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 311 on the transmission component 310 gradually approaches the second latch 3211 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 311 and the second latch 3211 lock together. Afterward, the isolating switch 400 continues to rotate and separates from the transmission component 310. That is, after the first latch 311 and the second latch 3211 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 of the first latch 311 and the second latch 3211 is relatively good.

[0061] 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 311 and the second latch 3211, 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 unlocking part 322 and drive the unlocking part 322 to move. Since the unlocking part 322 is connected to the locking part 321, the unlocking part 322 can... The moving locking part 321 overcomes the elastic force of the first elastic member 330 and moves away from the first latch 311, causing the second latch 3211 on the locking part 321 to separate from the first latch 311. After the second latch 3211 separates from the first latch 311, the moving contact 230 gradually approaches the stationary contact 220 under the action of the 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, so that the transmission member 310 returns 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 setting, 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.

[0062] The vacuum arc extinguishing mechanism 200 is kept open by locking the first latch 311 and the second latch 3211, and the first latch 311 and the second latch 3211 are unlocked by cooperating with the isolating switch 400 and the unlocking part 322. The control is convenient and smooth, and the structure is simple.

[0063] Understandably, when the unlocking part 322 is not pushed by the isolating switch 400, the locking part 321 will be pulled towards the first latch 311 under the action of the first elastic member 330, so that the second latch 3211 moves to the ready position to lock with the first latch 311. When the first latch 311 and the second latch 3211 are locked, the position of the second latch 3211 remains unchanged, thereby ensuring the reliability of the locking of the first latch 311 and the second latch 3211.

[0064] It is understandable that the first elastic element 330 can be, but is not limited to, a tension spring.

[0065] It is understandable that, since the transmission component 310 plays the role of current transfer, the transmission component 310 needs to be made of conductive material.

[0066] Optionally, the transmission component 310 can be rotatably connected to the insulating housing 210 via a fixed pin, or the transmission component 310 can be hinged to the moving contact 230 via a fixed pin.

[0067] Further, see also Figure 1 and Figure 2 Each locking part 321 has connecting rods 323 connected to opposite sides. The ends of the two connecting rods 323 furthest from the locking part 321 are bent and connected by an unlocking rod 324, which serves as the unlocking part 322 that cooperates with the isolating switch 400. Specifically, as the isolating switch 400 rotates in the second rotation direction, it enters between the two connecting rods 323 and pushes the unlocking rod 324 to move. The connecting rods 323 and the unlocking rod 324 form a frame structure with high structural stability, improving the reliability of the unlocking part 322.

[0068] Optionally, in this embodiment, the locking part 321, the connecting rod 323, and the unlocking rod 324 form an integrated structure, which has high connection strength and is easy to process.

[0069] Optionally, the locking element 320 is made of insulating material.

[0070] Optionally, see [link to relevant documentation] Figure 2 and Figure 3 The vacuum parallel switchgear also includes two insulating partitions 500, which are connected to opposite sides of the insulating housing 210 to form a protective space. The vacuum arc-extinguishing mechanism 200, the transmission mechanism 300, and the isolating contact 100 are all located within the protective space. By providing electrical insulation through the two insulating partitions 500, the risk of discharge during operation of the vacuum parallel switchgear is reduced, thereby improving the safety of its operation. Furthermore, at least one insulating partition 500 has a guide hole 510, and the connecting rod 323 near the insulating partition 500 has a protrusion 3231 that slides with the guide hole 510. This arrangement guides the movement of the connecting rod 323, which helps to improve the smoothness of the sliding of the locking part 321 on the insulating housing 210.

[0071] In this embodiment, each of the two insulating partitions 500 is provided with a guide hole 510, and each of the connecting rods 323 adjacent to each insulating partition 500 is provided with a protrusion 3231 that slides with the guide hole 510. With this arrangement, the locking part 321 has better uniformity of force distribution, which further improves the smoothness of sliding of the locking part 321.

[0072] Optionally, in this embodiment, the locking part 321 slides in the horizontal direction, and the connecting rod 323 is L-shaped, that is, the end of the connecting rod 323 away from the locking part 321 is bent in the horizontal direction.

[0073] Further, see also Figure 1 , Figure 4 and Figure 5The insulating housing 210 has a mounting arm 211 extending towards the isolating contact 100. A slide rail 2111 is provided on the lower surface of the mounting arm 211, and baffles 2112 are provided on opposite sides of the mounting arm 211. The slide rail 2111 is located between the two baffles 2112. A slider 3212 is provided on the top of the locking part 321, and a groove 32121 on the slider 3212 is provided to slide and engage with the slide rail 2111. The opposite sides of the slider 3212 are slidably attached to the two baffles 2112. Thus, the sliding assembly of the locking part 321 and the insulating housing 210 is achieved through the cooperation of the slider 3212 and the slide rail 2111. The structure is simple, and the sliding is smooth. Furthermore, the two baffles 2112 can limit and guide the sliding of the slider 3212, further improving the smoothness and reliability of the slider 3212 sliding on the slide rail 2111.

[0074] Optionally, in this embodiment, the slide rail 2111 extends in a horizontal direction.

[0075] Optionally, see [link to relevant documentation] Figure 1 One end of the first elastic member 330 is connected to the locking part 321, and the other end is connected to the insulating shell 210. In this embodiment, the axis of the first elastic member 330 is parallel to the slide rail 2111. With this arrangement, the locking member 320 is only subjected to tension along its sliding direction, that is, the elastic force of the first elastic member 330 can be used entirely to pull the locking member 320.

[0076] Further, see also Figure 1 The vacuum parallel switch device also includes a second elastic element 600, one end of which is connected to the transmission element 310 and the other end is connected to the insulating housing 210. The second elastic element 600 is configured to always have a tendency to push the first latch 311 to rotate away from the second latch 3211.

[0077] Specifically, when the first latch 311 on the transmission member 310 rotates towards the second latch 3211, the transmission member 310 compresses the second elastic member 600. At this time, the second elastic member 600 accumulates elastic potential energy. When the second latch 3211 disengages from the first latch 311, the second elastic member 600 releases its elastic potential energy, pushing 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.

[0078] It is understandable that the second elastic element 600 is optional but not limited to a compression spring.

[0079] Further, see also Figure 6The transmission component 310 has a first conductive arm 312 and two second conductive arms 313 at the other end of its rotation center. Elastic conductive elements 314 are provided on opposite sides of the first conductive arm 312, and the two second conductive arms 313 are located on opposite sides of the transmission component 310 and close to the first conductive arm 312. The isolating switch 400 includes two spaced-apart conductive plates 410, with the conductive plates 410, elastic conductive elements 314, and second conductive arms 313 correspondingly arranged.

[0080] Specifically, during the rotation of the isolating switch 400 in the first rotation direction, the conductive plate 410 first slides electrically connected to its corresponding elastic conductive element 314 until the conductive plate 410 separates from the isolating contact 100. During this process, the isolating switch 400, through its electrical connection with the elastic conductive element 314, gradually transfers current to the vacuum arc-extinguishing mechanism 200 via the transmission element 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 410 sliding electrically connected to the elastic conductive element 314 is the current transfer process, while simultaneously 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 during this process, the transmission element 310 does not rotate, and the moving contact 230 and the stationary contact 220 remain engaged.

[0081] After the current is completely transferred and the distance between the isolating switch 400 and the isolating contact 100 is a safe distance, the conductive plate 410 contacts the corresponding second conductive arm 313, and pushes the transmission member 310 to rotate through the second conductive arm 313, so that the transmission member 310 drives the contact 230 to separate from the stationary contact 220.

[0082] Understandably, during the engagement of the isolating switch 400 and the first conductive arm 312, the first conductive arm 312 is sandwiched between the two conductive plates 410. Therefore, by designing the distance between the two conductive plates 410, the conductive plates 410 can apply a certain pressure to the elastic conductive element 314, and the elastic force of the elastic conductive element 314 can ensure the reliability of the electrical connection between the conductive plates 410 and the elastic conductive element 314. Furthermore, the elastic conductive element 314 can also impede the movement of the conductive plates 410 to a certain extent, preventing the conductive plates 410 from moving too quickly, thus ensuring the stability of current transfer.

[0083] By setting two second conductive arms 313 to cooperate with two conductive plates 410 respectively, the working reliability of the conductive plates 410 driving the transmission component 310 to rotate is high.

[0084] Optionally, see [link to relevant documentation] Figure 6The second conductive arm 313 is detachably connected to the transmission component 310, and the angle of the second conductive arm 313 relative to the first conductive arm 312 is adjustable. This configuration allows the angle of the second conductive arm 313 to be adjusted to reduce the requirements for production precision.

[0085] In this embodiment, the second conductive support arm 313 is connected to the transmission component 310 by bolt connection. The bolt connection structure is simple, reliable, and easy to install and disassemble.

[0086] Understandably, the length of the flexible conductive element 314 can be designed according to the safe distance between the isolating switch 400 and the isolating contact 100.

[0087] Optionally, grooves can be provided on opposite sides of the first conductive arm 312 to install the elastic conductive element 314 in the grooves.

[0088] Optionally, in one possible embodiment, the elastic conductive element 314 is a watch strap finger, and the two conductive plates 410 have contacts 411 on their opposite surfaces, and the contacts 411 are slidably electrically connected to the watch strap finger.

[0089] Further, see also Figure 7 The other end of the transmission component 310 is provided with a transmission head 301. The transmission head 301 is provided with a first arc surface 3011. The first arc surface 3011 is close to the locking part 321. A first slot 3012 is provided on one side of the first arc surface 3011. The first arc surface 3011 and the first slot 3012 form a hook-shaped first latch 311. The locking part 321 is provided with a second arc surface 32111. The second arc surface 32111 is close to the transmission head 301. A second slot 32112 is provided on one side of the second arc surface 32111. The second arc surface 32111 and the second slot 32112 form a hook-shaped second latch 32111.

[0090] Specifically, as the transmission head 301 rotates towards the locking part 321 under the push of the isolation switch 400, the first arc surface 3011 will first contact the second arc surface 32111. As the transmission head 301 rotates further, the first arc surface 3011 slides against the second arc surface 32111. Furthermore, the transmission head 301 can apply a force away from itself to the locking part 321, causing the locking part 321 to move away from the first latch 311. When the first latch 311 moves into position, the first arc surface 3011 separates from the second arc surface 32111 and removes the pushing force applied to the locking part 321. At this time, the second latch 3211 will approach and lock the first latch 311 under the pulling force of the first elastic member 330.

[0091] The first latch 311 and the second latch 3211 have a simple structure and are easy to manufacture. Furthermore, the arrangement of the first arc surface 3011 and the second arc surface 32111 can reduce the resistance between the transmission head 301 and the locking part 321, which is beneficial to improving the smoothness of locking between the first latch 311 and the second latch 3211.

[0092] Optionally, see [link to relevant documentation] Figure 8 The isolating switch 400 is connected to the isolating spindle 20, which drives the isolating switch 400 to rotate. An insulating protective cover 700 is installed over the isolating spindle 20 and part of the isolating switch 400. The insulating protective cover 700 can strengthen the insulation and reduce the discharge risk of the isolating switch 400.

[0093] In this embodiment, as the isolating switch 400 rotates along the second rotation direction and begins to contact the isolating contact 100 until it reaches the rotation position, the insulating protective cover 700 will contact the unlocking part 322 and push the unlocking part 322 to move, so that the unlocking part 322 drives the locking part 321 to slide, causing the second latch 3211 to separate from the first latch 311.

[0094] To facilitate understanding, the working process of this vacuum parallel switch device will be briefly described below:

[0095] Opening process:

[0096] like Figure 1 As shown, the isolating switch 400 is in the position of engaging with the isolating contact 100, the main circuit is connected, the vacuum arc extinguishing mechanism 200 is in the closed state, the isolating contact 100 limits the unlocking part 322, so that the second latch 3211 is kept in the position separated from the first latch 311.

[0097] like Figure 8 As shown, under the drive of the isolating spindle 20, the isolating switch 400 rotates counterclockwise until the conductive plate 410 of the isolating switch 400 just contacts the elastic conductive element 314 on the first conductive support arm 312. At this time, the isolating switch 400 still partially 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 unlocking part 322. Therefore, the second latch 3211 will move to the left under the pull of the first elastic element 330.

[0098] like Figure 9As shown, as the isolating switch 400 rotates further counterclockwise, the conductive plate 410 of the isolating switch 400 slides electrically connected to the elastic conductive member 314 on the first conductive support arm 312 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 3211 continues to move to the left under the pull of the first elastic member 330 until the isolating switch 400 separates from the unlocking part 322. When the first elastic member 330 has no elastic deformation, the second latch 3211 no longer moves to the left. It is worth noting that during the transfer of the main circuit current to the vacuum arc-extinguishing mechanism 200 branch, the transmission member 310 remains stationary, that is, the vacuum arc-extinguishing mechanism 200 remains in a closed state.

[0099] like Figure 10 As shown, as the isolating switch 400 rotates further counterclockwise, the conductive plate 410 of the isolating switch 400 contacts the second conductive arm 313 and pushes the second conductive arm 313, causing the transmission member 310 to rotate counterclockwise. This counterclockwise rotation of the transmission member 310 compresses the second elastic member 600 and causes the first latch 311 to approach the second latch 3211, until the first arc surface 3011 contacts the second arc surface 32111. Furthermore, the transmission member 310 causes the moving contact 230 to gradually separate from the stationary contact 220.

[0100] like Figure 11 As shown, as the isolating switch 400 rotates further counterclockwise, the first latch 311 presses the second latch 3211, forcing the second latch 3211 to move to the right until the conductive plate 410 of the isolating switch 400 separates from the second conductive support arm 313. At this point, the first latch 311 rotates to its position, the first arc surface 3011 separates from the second arc surface 32111, and the second latch 3211 is locked to the first latch 311 under the action of the first elastic member 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.

[0101] like Figure 12 As shown, as the isolating switch 400 rotates further counterclockwise, the first latch 311 will remain locked with the second latch 3211, so that the vacuum arc extinguishing mechanism 200 remains in the open state;

[0102] Closing process:

[0103] like Figure 13As shown, the isolating switch 400 rotates clockwise under the action of the isolating spindle 20 and gradually approaches the isolating contact 100. During this process, the isolating switch 400 will never contact the first conductive arm 312 and the second conductive arm 313.

[0104] like Figure 14 As shown, as the isolating switch 400 rotates further in the clockwise direction, the isolating switch 400 begins to contact the isolating contact 100, and then the isolating switch 400 contacts the unlocking part 322;

[0105] like Figure 15 As shown, as the isolating switch 400 rotates further clockwise, the isolating switch 400 pushes the unlocking part 322 to drive the second latch 3211 to move to the right, causing the second latch 3211 to separate from the first latch 311. After the first latch 311 disengages from the second latch 3211, the transmission component 310 will return to its initial position under the action of the elastic force of the second elastic component 600 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.

[0106] This embodiment also provides a switching device, including a cabinet 40 and the aforementioned vacuum parallel switch device, wherein the vacuum parallel switch device is disposed inside the cabinet 40.

[0107] Because this switchgear uses the aforementioned vacuum parallel switch device, its opening and closing operations have better safety and reliability.

[0108] Optionally, see [link to relevant documentation] Figure 1 and Figure 7 In this embodiment, the two ends of the main busbar 10 are installed on the side wall of the cabinet 40 through the sleeve 30.

[0109] 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 locking component, and a first elastic 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 locking component includes a locking part and an unlocking part. The locking part is slidably assembled to the insulating housing, and the locking part is provided with a second latch. The first elastic component is configured to always have a tendency to pull the locking part closer to the first latch. One end of the unlocking part is connected to the locking part, and the unlocking part can pull the locking part 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. As the isolating switch rotates along the second rotation direction, it first engages with the isolating contact, and then continues to rotate to contact the unlocking part and drive the unlocking part to move, so that the unlocking part pulls the locking part away from the first latch, thereby separating the second latch 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 transmission head, and the transmission head is provided with a first arc surface. The first arc surface is close to the locking part, and a first slot is provided on one side of the first arc surface. The first arc surface and the first slot form a hook-shaped first latch. The locking part is provided with a second arc surface, which is close to the transmission head. A second slot is provided on one side of the second arc surface, and the second arc surface and the second slot form a hook-shaped second latch. As the transmission head rotates toward the locking part, the first arc surface can cooperate with the second arc surface to push the locking part away from the first latch until the first latch moves into place, at which point the first elastic element pulls the second latch to lock with the first latch.

3. The vacuum parallel switch device according to claim 1, characterized in that, The insulating housing is provided with a mounting arm extending toward the isolating contact. A slide rail is provided on the lower surface of the mounting arm. Baffles are provided on opposite sides of the mounting arm. The slide rail is located between the two baffles. A slider is provided on the top of the locking part. A slide groove is provided on the slider to slide with the slide rail. The opposite sides of the slider are slidably attached to the two baffles. And / or, one end of the first elastic member is connected to the locking part, and the other end is connected to the insulating shell.

4. The vacuum parallel switch device according to claim 1, characterized in that, Connecting rods are connected to both sides of the locking part. The ends of the two connecting rods away from the locking part are bent and connected by an unlocking rod. The unlocking rod is the unlocking part that cooperates with the isolating knife switch. When the isolating knife switch rotates along the second rotation direction, it will enter between the two connecting rods and push the unlocking rod to move.

5. The vacuum parallel switch device according to claim 4, characterized in that, The vacuum parallel switch device also includes two insulating partitions, which are respectively connected to the opposite sides of the insulating shell to form a protective space. The vacuum arc extinguishing mechanism, the transmission mechanism and the isolation contact are all located in the protective space. At least one of the insulating partitions is provided with a guide hole, and the connecting rod near the insulating partition is provided with a protrusion that slides with the guide hole.

6. The vacuum parallel switching device according to any one of claims 1-5, characterized in that, The vacuum parallel switch device further includes a second 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 second elastic element is configured to always have a tendency to push the first latch to rotate away from the second latch.

7. The vacuum parallel switching device according to any one of claims 1-5, characterized in that, The other end of the transmission component is provided with a first conductive arm and two second conductive arms. The first conductive arm is provided with elastic conductive elements on opposite sides. The two second conductive arms are respectively provided on opposite sides of the transmission component and close to the first conductive arm. The isolating switch includes two spaced-apart conductive plates. The conductive plates, the elastic conductive element, and the second conductive arm are correspondingly arranged. During the rotation of the isolating switch along the first rotation direction, the conductive plate first slides and is electrically connected to the corresponding elastic conductive element until it is separated from the isolating contact. After that, the conductive plate will contact the corresponding second conductive arm and push the transmission element to rotate through the second conductive arm.

8. The vacuum parallel switch device according to claim 7, characterized in that, The elastic conductive element is a watch strap finger, and the two conductive plates have contact points on their opposite surfaces. The contact points are slidably electrically connected to the watch strap finger.

9. The vacuum parallel switching device according to any one of claims 1-5, characterized in that, The isolating switch is connected to the isolating spindle, which drives the isolating switch to rotate. An insulating protective cover is provided over the isolating spindle and part of the isolating switch.

10. A switchgear, characterized in that, It includes a cabinet and a vacuum parallel switch device according to any one of claims 1-9, wherein the vacuum parallel switch device is disposed in the cabinet.

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