Vacuum parallel switch device and switchgear

Abstract

The utility model belongs to switch device technical field discloses a kind of vacuum shunt switch device and switch equipment. Vacuum shunt switch device includes isolating contact, vacuum arc-extinguishing mechanism, transmission mechanism and isolating knife switch. Transmission mechanism includes transmission assembly, rotating member and elastic member. The process of isolating knife switch rotates along first rotation direction is rotated by driving rotating member to drive transmission assembly to rotate, make transmission assembly drive moving contact and static contact separate, after moving contact and static contact complete separation, rotating member keeps and limit support arm abut under the action of elastic member;The process of isolating knife switch rotates along second rotation direction is rotated by driving rotating member to drive transmission assembly to rotate, make transmission assembly drive moving contact and static contact gradually engage to complete closing, and before moving contact and static contact engage, isolating knife switch has been engaged with isolating contact. The opening and closing operation safety of the vacuum shunt switch device is better.

Description

Technical Field

[0001] This utility model 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. Utility Model Content

[0005] According to one aspect of the present invention, the present invention provides a vacuum parallel switch device, 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 this objective, 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 and move away from the isolating contact, and is rotatable in a second rotational direction to approach and 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 rotating component, and an elastic component. The transmission component and the rotating component are rotatably connected to the insulating housing. The moving contact and the rotating component are hinged to the transmission component. When the transmission component is driven, it can drive the moving contact to move relative to the stationary contact, thereby realizing the opening and closing of the vacuum arc-extinguishing mechanism. The transmission component is provided with a limiting arm, which is used to cooperate with the rotating component.

[0012] When the isolating switch rotates along the first rotation direction, it contacts and drives the rotating component to rotate, causing the rotating component to drive the transmission assembly to rotate, which in turn causes the transmission assembly to drive the moving contact to separate from the stationary contact. After the moving contact and the stationary contact are separated, the rotating component remains in contact with the limiting arm under the action of the elastic element, so that the moving contact and the stationary contact remain separated.

[0013] When the isolating switch rotates along the second rotation direction, it contacts and drives the rotating component to rotate, causing the rotating component to drive the transmission assembly to rotate, thereby causing the transmission assembly to drive the moving contact to gradually engage with the stationary contact until the circuit is closed. Before the moving contact engages with the stationary contact, the isolating switch has already engaged with the isolating contact.

[0014] Optionally, the transmission assembly includes a first link and a second link. One end of the first link is rotatably connected to the insulating housing. The middle part of the first link is hinged to the moving contact. The other end of the first link is provided with the limiting arm, and the other end of the first link is hinged to one end of the second link. One end of the second link is hinged to the rotating member. One end of the elastic member is connected to the insulating housing, and the other end is connected to the first link. The elastic member is configured to always have a tendency to rotate the first link toward the moving contact.

[0015] Optionally, the limiting arm and the first connecting rod form an integral structure.

[0016] Optionally, the first connecting rod includes a first connecting segment and a second connecting segment arranged at an angle. The end of the first connecting segment away from the second connecting segment is rotatably connected to the insulating shell. The middle part of the first connecting segment is hinged to the moving contact. The end of the second connecting segment near the first connecting segment is hinged to the second connecting rod. The remaining part of the second connecting segment forms the limiting arm.

[0017] Optionally, the insulating shell is provided with two parallel and spaced connecting plates, and the two ends of the rotating shaft are respectively connected to the two connecting plates. The rotating component is provided with a connecting hole, and the rotating component is connected to the rotating shaft through the connecting hole. The rotating component can rotate around the rotating shaft.

[0018] Optionally, a conductive support arm and an insulating support arm are provided on the rotating member. The transmission assembly is hinged to the conductive support arm. During the rotation of the isolating switch along the first rotation direction, the isolating switch cooperates with the conductive support arm, and during the rotation of the isolating switch along the second rotation direction, the isolating switch cooperates with the insulating support arm.

[0019] Optionally, the rotating member is in a shape similar to a "匚", and the conductive support arm and the insulating support arm are arranged to be of unequal lengths.

[0020] Optionally, the rotating member includes a conductive block and an insulating block. One end of the conductive block is provided with the conductive support arm, one end of the insulating block is provided with the insulating support arm, and the other ends of the conductive block and the insulating block are butted to form the rotating member.

[0021] Optionally, the isolating switch is connected to an isolating main shaft for driving the isolating switch to rotate, and an insulating protective cover is disposed outside the isolating main shaft and a part of the isolating switch.

[0022] According to another aspect of the present invention, the present invention further provides a switching device, including a cabinet body and the vacuum parallel switch device according to any one of the above technical solutions, and the vacuum parallel switch device is disposed in the cabinet body.

[0023] Advantages of the present invention:

[0024] The present 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 that the isolating switch rotates along the first rotation direction and disengages from the isolating contact, the isolating switch will first contact the rotating member, transfer the current through the rotating member and the transmission assembly to the vacuum arc extinguishing mechanism, and drive the transmission assembly to rotate by driving the rotation of the rotating member, so that the transmission assembly drives the moving contact and the static contact in the vacuum arc extinguishing mechanism to gradually separate, and an arc is generated in the vacuum arc extinguishing chamber, and the arc is extinguished by vacuum, which improves the safety and reliability of the opening operation. As the isolating switch further rotates, the moving contact moves to the opening position away from the static contact. After that, the rotating member abuts against the limiting support arm under the action of the elastic member, that is, the rotating member remains stationary under the action of the elastic member, so that the transmission assembly drives the moving contact to remain separated from the static contact, thereby realizing the opening holding of the vacuum arc extinguishing mechanism, and this opening state is not released until the isolating switch rotates along the second rotation direction and engages with the isolating contact. With such a setting, when the isolating switch rotates to a position close to the vacuum arc extinguishing mechanism during the closing operation, no discharge will occur 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 the closing.

[0025] By using a limiting arm to restrict the rotating parts, excessive rotation of the rotating parts under the action of inertial force or elastic force can be avoided.

[0026] During the process of the isolating switch rotating in the second rotation direction and driving the rotating component to rotate, the transmission component can be simultaneously subjected to the action of the elastic component and the rotating component to drive the moving contact to engage with the stationary contact, thereby reducing the risk of the vacuum arc extinguishing mechanism failing to close.

[0027] 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

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the vacuum parallel switch device provided in this embodiment of the utility model;

[0030] Figure 2 This is a schematic diagram of the cooperation between the vacuum arc-extinguishing mechanism and the transmission mechanism provided in this embodiment of the utility model (elastic elements are not shown);

[0031] Figure 3 This is a schematic diagram of the cooperation between the isolating switch and the transmission mechanism provided in this embodiment of the utility model (elastic element not shown);

[0032] Figures 4-8 This is a schematic diagram of the opening process of the vacuum parallel switch device provided in this embodiment of the utility model;

[0033] Figures 9-11 This is a schematic diagram of the closing process of the vacuum parallel switch device provided in this embodiment of the utility model.

[0034] In the picture:

[0035] 10. Main busbar; 20. Isolation spindle; 30. Bushing;

[0036] 100. Isolation contacts;

[0037] 200. Vacuum arc-extinguishing mechanism; 210. Insulating shell; 211. Connecting plate; 212. Rotating shaft; 220. Stationary contact; 230. Moving contact;

[0038] 300. Transmission mechanism; 310. Transmission assembly; 311. First connecting rod; 3111. Limiting arm; 312. Second connecting rod; 320. Rotating component; 321. Conductive arm; 322. Insulating arm; 330. Elastic component; 340. Connecting lug;

[0039] 400. Isolating switch;

[0040] 500. Insulating protective cover. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0042] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0045] 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.

[0046] Specifically, such as Figures 1-11 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.

[0047] 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.

[0048] 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, 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. Optionally, in one possible embodiment, the stationary contact 220 can be electrically connected to the isolating contact 100 via the main busbar 10, meaning both the stationary contact 220 and the isolating contact 100 are electrically connected to the main busbar 10. It is worth noting that the insulating housing 210 serves as an insulating mounting bracket for fixing the vacuum arc-extinguishing mechanism 200.

[0049] The transmission mechanism 300 includes a transmission assembly 310, a rotating member 320, and an elastic member 330. Both the transmission assembly 310 and the rotating member 320 are rotatably connected to the insulating housing 210. The moving contact 230 and the rotating member 320 are hinged to the transmission assembly 310. That is, the rotating member 320, driven by an external force, can rotate, causing the transmission assembly 310 to rotate, thereby causing the transmission assembly 310 to separate or engage the moving contact 230 with the stationary contact 220, thus realizing the opening or closing of the vacuum arc-extinguishing mechanism 200. The transmission assembly 310 is provided with a limiting arm 3111, which cooperates with the rotating member 320 to limit the rotation angle of the rotating member 320. The elastic member 330 is used to keep the rotating member 320 in the position cooperating with the limiting arm 3111, and to assist the transmission assembly 310 in driving the moving contact 230 to engage with the stationary contact 220.

[0050] The working principle of this vacuum parallel switch device is as follows:

[0051] Isolating switch 400 along the first rotation direction ( Figure 1 During the process of rotating counterclockwise and disengaging from the isolating contact 100, the isolating switch 400 first contacts the rotating component 320, transferring the current through the rotating component 320 and the transmission assembly 310 to the vacuum arc-extinguishing mechanism 200. Then, by driving the rotating component 320 to rotate, the transmission assembly 310 is driven to rotate. The rotation of the transmission assembly 310 will cause 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 will be generated. Since the electric arc is generated in the vacuum arc-extinguishing chamber, 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, improving the safety and reliability of the opening operation of the vacuum parallel switch device. Furthermore, after the moving contact 230 and the stationary contact 220 are separated, the rotating member 320 remains in contact with the limiting arm 3111 under the action of the elastic member 330. That is, the rotating member 320 remains stationary. If the rotating member 320 remains stationary, the transmission assembly 310 also remains stationary. This keeps the moving contact 230 connected to the transmission assembly 310 in the open position with the stationary contact 220, so that the vacuum arc extinguishing mechanism 200 can always remain in the open state.

[0052] Isolating switch 400 along the second rotation direction ( Figure 1During the clockwise rotation process of the isolating switch 400 engaging with the isolating contact 100, the isolating switch 400 can re-engage with the rotating member 320 and drive the rotating member 320 to rotate in the opposite direction. This causes the rotating member 320 to drive the transmission component 310 to rotate, which in turn causes the transmission component 310 to drive the moving contact 230 to gradually engage with the stationary contact 220 until the closing is completed. Furthermore, before the moving contact 230 engages with the stationary contact 220, the isolating switch 400 has already engaged with the isolating contact 100. That is, the open 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 open state. This improves the safety and reliability of the vacuum parallel switch device during closing.

[0053] Understandably, the elastic element 330 can drive the transmission assembly 310 to quickly engage the moving contact 230 and the stationary contact 220 through elastic force, reducing the risk of the vacuum arc extinguishing mechanism 200 failing to close.

[0054] By limiting the rotating component 320 with the limiting arm 3111, excessive rotation of the rotating component 320 under the action of inertial force or elastic force 330 can be avoided.

[0055] Optionally, in one possible embodiment, the moving contact 230 inside the vacuum interrupter chamber can engage with the stationary contact 220 under the action of a self-closing force when not subjected to external force. Therefore, during the rotation of the isolating switch 400 in the second rotation direction, the moving contact 230 can be simultaneously driven by the transmission component 310 and the self-closing force to engage with the stationary contact 220, reducing the risk of the vacuum interrupter mechanism 200 failing to close.

[0056] Optionally, see [link to relevant documentation] Figure 1 and Figure 2 The transmission assembly 310 includes a first connecting rod 311 and a second connecting rod 312. Specifically, one end of the first connecting rod 311 is rotatably connected to the insulating housing 210, the middle part of the first connecting rod 311 is hinged to the moving contact 230, the other end of the first connecting rod 311 is hinged to one end of the second connecting rod 312, the other end of the second connecting rod 312 is hinged to the rotating member 320, a limiting arm 3111 is provided on the other end of the first connecting rod 311, and the other end of the second connecting rod 312 is hinged to the rotating member 320. In this embodiment, the hinge point between the second connecting rod 312 and the rotating member 320 is located on the side of the rotation center of the rotating member 320 closer to the second connecting rod 312.

[0057] Specifically, the connection between the first connecting rod 311 and the insulating housing 210 is as follows: Figure 1At point a in Figure 1, the hinge point between the first link 311 and the moving contact 230 is at point b in Figure 1, and the hinge point between the first link 311 and the second link 312 is at point b in Figure 1. Figure 1 At point c, the hinge between the second connecting rod 312 and the rotating part 320 is... Figure 1 At point d in the diagram, the connection between the rotating component 320 and the insulating shell 210 is... Figure 1 Point e in the diagram. The configuration, arrangement, and connection of the first link 311, the second link 312, and the rotating component 320 form a four-bar linkage, which is simple in structure and reliable in force transmission.

[0058] Optionally, see [link to relevant documentation] Figure 1 In this embodiment, one end of the elastic member 330 is connected to the insulating shell 210, and the other end is connected to the first connecting rod 311. The elastic member 330 is configured to always have a tendency to rotate the first connecting rod 311 toward the moving contact 230.

[0059] To facilitate understanding, the working process of the transmission mechanism 300 is briefly described below (taking the first rotation direction as counterclockwise and the second rotation direction as clockwise as an example):

[0060] like Figure 1 , Figures 4-8 As shown, during the counterclockwise rotation of the isolating switch 400, it first contacts the rotating component 320, driving the rotating component 320 to rotate clockwise around point e. The clockwise rotation of the rotating component 320 causes the first connecting rod 311 to rotate clockwise around point a via the second connecting rod 312. The clockwise rotation of the first connecting rod 311 pulls the moving contact 230 outward, gradually separating it from the stationary contact 220. When the moving contact 230 and the stationary contact... When the head 220 completes separation (the moving contact 230 moves to a distance of the specified opening distance from the stationary contact 220), the rotating member 320 rotates to abut against the limiting arm 3111, restricting the rotating member 320 from continuing to rotate. At this time, the elastic member 330 applies a pulling force to the first connecting rod 311. Since the rotating member 320 abuts against the limiting arm 3111, the first connecting rod 311, the second connecting rod 312, and the rotating member 320 can remain stationary, thereby achieving the opening retention of the vacuum arc extinguishing mechanism 200.

[0061] Understandably, the position where the rotating component 320 abuts against the limiting arm 3111 can be designed as the dead point position of the four-bar linkage formed by the first link 311, the second link 312, and the rotating component 320, in order to improve the reliability of the vacuum arc extinguishing mechanism 200 in holding the circuit breaker open.

[0062] like Figure 1 , Figures 9-11As shown, during the clockwise rotation of the isolating switch 400, the driving rotating component 320 rotates counterclockwise around point e. This counterclockwise rotation of the rotating component 320 causes the first connecting rod 311 to rotate counterclockwise around point a via the second connecting rod 312. This counterclockwise rotation of the first connecting rod 311 pushes the moving contact 230 inward, gradually bringing it closer to the stationary contact 220 until they engage. The transmission mechanism 300 then returns to its initial position. Simultaneously, during this process, the elastic component 330 continuously pulls the first connecting rod 311 counterclockwise through its elastic restoring force, assisting the first connecting rod 311 in quickly engaging the moving contact 230 with the stationary contact 220, thus improving the reliability of the vacuum arc-extinguishing mechanism 200's successful closing.

[0063] Furthermore, in one possible embodiment, the limiting arm 3111 and the first connecting rod 311 form an integral structure. This arrangement can ensure the connection strength between the first connecting rod 311 and the limiting arm 3111, and is also convenient for processing.

[0064] Optionally, see [link to relevant documentation] Figure 2 In this embodiment, the first connecting rod 311 includes a first connecting segment and a second connecting segment arranged at an angle. The end of the first connecting segment away from the second connecting segment is rotatably connected to the insulating shell 210. The middle part of the first connecting segment is hinged to the moving contact 230. The end of the second connecting segment near the first connecting segment is hinged to the second connecting rod 312. The remaining part of the second connecting segment forms a limiting arm 3111.

[0065] Optionally, the first link 311 is L-shaped.

[0066] Optionally, see [link to relevant documentation] Figure 1 and Figure 2 In one possible embodiment, the insulating housing 210 has connecting ears 340 on the side wall near the stationary contact 220 and on the first connecting rod 311. Each connecting ear 340 has a through hole, and the elastic element 330 is a tension spring, with both ends of the tension spring hanging from the connecting ears 340 through the through holes. In other possible embodiments, a flat plate (not shown in the figure) can also be provided on the insulating housing 210. The flat plate is located on the side of the first connecting rod 311 away from the moving contact 230. The elastic element 330 is a compression spring, with one end connected to the flat plate and the other end connected to the end of the first connecting rod 311 near the second connecting rod 312.

[0067] Further, see also Figures 1-3, there are two connecting plates 211 arranged in parallel and spaced apart on the insulating housing 210. Both ends of the rotating shaft 212 are connected to the two connecting plates 211 respectively. A connecting hole is provided on the rotating member 320, and the rotating member 320 is connected to the rotating shaft 212 through the connecting hole. The rotating member 320 can rotate around the rotating shaft 212. The rotating connection between the rotating member 320 and the insulating housing 210 is realized through the connecting plate 211 and the rotating shaft 212. The structure is simple, convenient for assembly, and does not interfere with the rotation of the rotating member 320, improving the smoothness of the rotation of the rotating member 320.

[0068] Further, continue to refer to Figure 1 , a conductive arm 321 and an insulating arm 322 are provided on the rotating member 320, and the transmission component 310 is hinged to the conductive arm 321. In this embodiment, the second connecting rod 312 is hinged to the conductive arm 321 of the rotating member 320. It can be understood that both the first connecting rod 311 and the second connecting rod 312 have electrical conductivity, so that the current of the isolating switch 400 can be transferred to the moving contact 230 through the conductive arm 321, the second connecting rod 312 and the first connecting rod 311 in sequence.

[0069] Specifically, during the rotation of the isolating switch 400 in the first rotation direction, it cooperates with the conductive arm 321, so that the current is transferred to the moving contact 230 through the conductive arm 321, the second connecting rod 312 and the first connecting rod 311. During the rotation of the isolating switch 400 in the second rotation direction, it cooperates with the insulating arm 322 to block the transfer of current. In this way, the risk of discharge between the isolating switch 400 and the vacuum arc extinguishing mechanism 200 can be reduced, and the closing stability is improved.

[0070] Optionally, continue to refer to Figures 1-3 , in this embodiment, the rotating member 320 includes a conductive block and an insulating block. One end of the conductive block is provided with a conductive arm 321, one end of the insulating block is provided with an insulating arm 322, and the other end of the conductive block is butted against the other end of the insulating block to form the rotating member 320. This rotating member 320 has a simple structure and is convenient for processing.

[0071] Optionally, in a possible embodiment, both the conductive block and the insulating block are in a shape similar to "L".

[0072] Further, the conductive block and the insulating block can be connected by bolts. The bolt connection structure is simple, convenient for assembly, and has a high connection strength.

[0073] Optionally, continue to refer to Figure 1 , in a possible embodiment, the rotating member 320 is in a shape similar to "匚", with a simple structure and convenient for processing. Moreover, the conductive arm 321 and the insulating arm 322 are set to be of unequal length. With such a setting, it is convenient for the isolating switch 400 to cooperate with the conductive arm 321 and the insulating arm 322.

[0074] 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 500 is installed over the isolating spindle 20 and part of the isolating switch 400. The insulating protective cover 500 can strengthen the insulation and reduce the discharge risk of the isolating switch 400.

[0075] Optionally, see [link to relevant documentation] Figure 1 In this embodiment, the vacuum arc-extinguishing mechanism 200 is arranged at an angle, and the transmission mechanism 300 is located between the vacuum arc-extinguishing mechanism 200 and the isolating switch 400. This arrangement reduces the vertical space occupied by the vacuum arc-extinguishing mechanism 200 and makes the transmission mechanism 300 closer to both the vacuum arc-extinguishing mechanism 200 and the isolating switch 400, which helps to improve the structural compactness of the transmission mechanism 300.

[0076] To facilitate understanding, the working process of this vacuum parallel switch device will be briefly described below:

[0077] Opening process:

[0078] 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, and the vacuum arc extinguishing mechanism 200 is in the closed state under the action of the tension and self-closing force of the elastic element 330.

[0079] like Figure 4 As shown, the isolating switch 400 rotates counterclockwise under the drive of the isolating spindle 20 until it contacts the conductive support arm 321 on the rotating part 320. At this time, the isolating switch 400 partially remains in contact with the isolating contact 100. At this time, a portion of the current in the main circuit is transferred to the vacuum arc extinguishing mechanism 200 to form a parallel circuit.

[0080] like Figure 5 As shown, as the isolating switch 400 rotates further counterclockwise, the isolating switch 400 pushes the conductive support arm 321 to make the rotating part 320 rotate clockwise. The clockwise rotation of the rotating part 320 will drive the first connecting rod 311 to rotate clockwise through the second connecting rod 312. The clockwise rotation of the first connecting rod 311 will drive the moving contact 230 to gradually move away from the stationary contact 220 and stretch the elastic part 330. When the isolating switch 400 separates from the isolating contact 100, the main circuit current is transferred to the vacuum arc extinguishing mechanism 200. That is, the main circuit current forms a single circuit state through the isolating switch 400 and the vacuum arc extinguishing mechanism 200.

[0081] like Figure 6 and Figure 7As shown, as the isolating switch 400 rotates further counterclockwise, the isolating switch 400 continues to drive the rotating component 320 to rotate clockwise via the conductive support arm 321. The moving contact 230 continues to move away from the stationary contact 220 until the rotating component 320 comes into contact with the limiting support arm 3111. At this point, the rotating component 320 stops rotating, and the isolating switch 400 is about to separate from the conductive support arm 321. The opening distance between the moving contact 230 and the stationary contact 220 meets the specified opening distance, and the vacuum arc extinguishing mechanism 200 achieves opening. At the same time, under the action of the elastic component 330 and the limiting support arm 3111, the first connecting rod 311, the second connecting rod 312 and the rotating component 320 remain stationary, thus achieving the opening and holding of the vacuum arc extinguishing mechanism 200.

[0082] like Figure 8 As shown, as the isolating switch 400 rotates further counterclockwise, the isolating switch 400 separates from the conductive support arm 321, and the vacuum arc extinguishing mechanism 200 remains in the open state. The vacuum parallel switch device is now open.

[0083] Closing process:

[0084] like Figure 9 As shown, the isolating switch 400 rotates clockwise under the drive of the isolating spindle 20 until it contacts the insulating support arm 322 on the rotating part 320;

[0085] like Figure 10 As shown, as the isolating switch 400 rotates further in the clockwise direction, the isolating switch 400 pushes the rotating component 320 to rotate in the counterclockwise direction through the insulating support arm 322. The rotation of the rotating component 320 in the counterclockwise direction will drive the first connecting rod 311 to rotate in the counterclockwise direction through the second connecting rod 312. The rotation of the first connecting rod 311 in the counterclockwise direction will drive the moving contact 230 to gradually engage with the stationary contact 220. At the same time, the elastic component 330 also pulls the first connecting rod 311 to rotate in the counterclockwise direction under the action of elastic restoring force.

[0086] like Figure 11 As shown, as the isolating switch 400 rotates further clockwise, it first contacts the isolating contact 100, and then continues to rotate through the insulating support arm 322 until it finally separates from the insulating support arm 322. Then the moving contact 230 and the stationary contact 220 are engaged. That is, the vacuum arc extinguishing mechanism 200 closes after the isolating switch 400 and the isolating contact 100 are engaged, in order to reduce the risk of discharge between the isolating switch 400 and the vacuum arc extinguishing mechanism 200. When the isolating switch 400 is rotated to the position, the vacuum parallel switch device is closed.

[0087] 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.

[0088] Because this switchgear uses the aforementioned vacuum parallel switch device, its opening and closing operations have better safety and reliability.

[0089] Optionally, see [link to relevant documentation] Figure 1 and Figure 2 In this embodiment, the two ends of the main busbar 10 are installed on the side wall of the cabinet through sleeves 30.

[0090] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. 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 this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A vacuum interrupter device, characterized in that include: Isolating contact (100); The isolating switch (400) is rotatable in a first rotational direction to disengage from and move away from the isolating contact (100), and is rotatable in a second rotational direction to approach and engage with the isolating contact (100); The vacuum interrupting mechanism (200) includes an insulating shell (210) and a vacuum interrupting chamber installed inside the insulating shell (210). The vacuum interrupting chamber is provided with a stationary contact (220) and a moving contact (230). The stationary contact (220) is electrically connected to the isolating contact (100). The transmission mechanism (300) includes a transmission assembly (310), a rotating component (320), and an elastic component (330). The transmission assembly (310) and the rotating component (320) are rotatably connected to the insulating shell (210). The moving contact (230) and the rotating component (320) are hinged to the transmission assembly (310). When the transmission assembly (310) is driven, it can drive the moving contact (230) to move relative to the stationary contact (220), thereby realizing the opening and closing of the vacuum arc extinguishing mechanism (200). The transmission assembly (310) is provided with a limiting arm (3111), which is used to cooperate with the rotating component (320). When the isolating switch (400) rotates along the first rotation direction, it contacts and drives the rotating component (320) to rotate, causing the rotating component (320) to drive the transmission assembly (310) to rotate, thereby causing the transmission assembly (310) to drive the moving contact (230) to separate from the stationary contact (220). After the moving contact (230) and the stationary contact (220) are separated, the rotating component (320) remains in contact with the limiting arm (3111) under the action of the elastic component (330), so that the moving contact (230) and the stationary contact (220) remain separated. When the isolating switch rotates along the second rotation direction, it contacts and drives the rotating component (320) to rotate, causing the rotating component (320) to drive the transmission assembly (310) to rotate, thereby causing the transmission assembly (310) to drive the moving contact (230) to gradually engage with the stationary contact (220) until the circuit is closed. Before the moving contact (230) engages with the stationary contact (220), the isolating switch (400) has already engaged with the isolating contact (100).

2. The vacuum interrupter arrangement of claim 1, wherein The transmission component (310) includes a first connecting rod (311) and a second connecting rod (312). One end of the first connecting rod (311) is rotatably connected to the insulating housing (210). The middle of the first connecting rod (311) is hinged to the moving contact (230). A limiting support arm (3111) is provided at the other end of the first connecting rod (311), and the other end of the first connecting rod (311) is hinged to one end of the second connecting rod (312). One end of the second connecting rod (312) is hinged to the rotating member (320). One end of the elastic member (330) is connected to the insulating housing (210), and the other end is connected to the first connecting rod (311). The elastic member (330) is configured to always have a tendency to rotate the first connecting rod (311) in a direction close to the moving contact (230).

3. The vacuum interrupter arrangement of claim 2, wherein, The limiting support arm (3111) and the first connecting rod (311) form an integral structure.

4. The vacuum interrupter arrangement of claim 3, wherein The first connecting rod (311) includes a first connecting segment and a second connecting segment arranged at an angle. The end of the first connecting segment far from the second connecting segment is rotatably connected to the insulating housing (210). The middle of the first connecting segment is hinged to the moving contact (230). One end of the second connecting segment close to the first connecting segment is hinged to the second connecting rod (312), and the remaining part of the second connecting segment forms the limiting support arm (3111).

5. The vacuum interrupter arrangement of claim 1, wherein, Two parallel and spaced connecting plates (211) are provided on the insulating housing (210). Both ends of the rotating shaft (212) are respectively connected to the two connecting plates (211). A connecting hole is provided on the rotating member (320), and the rotating member (320) is connected to the rotating shaft (212) through the connecting hole. The rotating member (320) can rotate around the rotating shaft (212).

6. The vacuum interrupter arrangement of any one of claims 1-5, wherein, A conductive support arm (321) and an insulating support arm (322) are provided on the rotating member (320). The transmission component (310) is hinged to the conductive support arm (321). During the rotation of the isolating switch (400) in the first rotation direction, it cooperates with the conductive support arm (321). During the rotation of the isolating switch (400) in the second rotation direction, it cooperates with the insulating support arm (322).

7. The vacuum interrupter arrangement of claim 6, wherein, The rotating member (320) is in a shape similar to a "C", and the conductive support arm (321) and the insulating support arm (322) are set to be of unequal length.

8. The vacuum interrupter arrangement of claim 6, wherein, The rotating member (320) includes a conductive block and an insulating block. One end of the conductive block is provided with the conductive support arm (321), and one end of the insulating block is provided with the insulating support arm (322). The other ends of the conductive block and the insulating block are butted to form the rotating member (320).

9. The vacuum interrupter arrangement of any one of claims 1-5, wherein, The isolating switch (400) is connected to the isolating main shaft (20). The isolating main shaft (20) is used to drive the isolating switch (400) to rotate. An insulating protective cover (500) covers the isolating main shaft (20) and part of the isolating switch (400).

10. Switching device, characterized in that A vacuum parallel switch device as claimed in any one of claims 1-9 is included in a cabinet and arranged in the cabinet.

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