Vacuum parallel switch device and switch equipment

Abstract

The invention relates to the technical field of switch devices, and particularly discloses a vacuum parallel switch device and switch equipment. The vacuum parallel switch device comprises an isolation contact, a vacuum arc extinguishing mechanism, a transmission mechanism and an isolation disconnecting link. The transmission mechanism comprises a transmission assembly, a first elastic piece and a limiting piece, the limiting piece is arranged on the insulating shell, and the transmission assembly is connected with the moving contact. The isolation switch drives the transmission assembly to drive the moving contact and the static contact to be separated in the process of rotating in the first rotating direction, and after the moving contact and the static contact are separated, the transmission assembly achieves balance under the combined action of the first elastic piece and the limiting piece so that the moving contact and the static contact can be kept separated. When the isolation switch rotates along the second rotation direction, the transmission assembly is driven to drive the moving contact to be connected with the static contact, and before the moving contact is connected with the static contact, the isolation switch is connected with the isolation contact. The vacuum parallel switch device is good in opening and closing operation safety.

Description

Technical Field

[0001] The present invention relates to the technical field of switch devices, and in particular to a vacuum parallel switch device and a switch equipment. Background Art

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

[0003] Therefore, the disconnection scheme for load switches widely adopts a vacuum interrupter and knife switch in parallel, while also using environmentally friendly gas (air) insulation. This scheme allows the current to flow normally through the knife switch during closing, and the vacuum interrupter to interrupt the current during opening, effectively extinguishing the arc. During the opening and closing process of the load switch, the drive of the vacuum interrupter is usually completed by the cooperation between the knife switch and the transmission mechanism. Traditional transmission mechanisms only have simple transmission functions. When the knife switch and transmission mechanism are separated, the vacuum interrupter will engage under the action of the self-closing force. This poses a risk of discharge when the knife switch is rotated to a position close to the transmission mechanism during closing.

[0004] Therefore, it is urgent to propose a vacuum parallel switch device and a switch equipment to solve the above technical problems. Summary of the Invention

[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 to extinguish the arc through the vacuum arc extinguishing mechanism, thereby improving the safety and reliability of the opening operation, and can achieve opening maintenance after vacuum arc extinguishing, avoiding the risk of discharge between the isolation knife switch and the transmission mechanism, and improving the safety and reliability of the closing operation.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] Vacuum parallel switch device, comprising:

[0008] Isolating contacts;

[0009] An isolating knife switch capable of rotating in a first rotation direction to disengage from and away from the isolating contact, and capable of rotating in a second rotation direction to approach and engage with the isolating contact;

[0010] A vacuum interrupter mechanism comprises an insulating housing and a vacuum interrupter chamber installed in the insulating housing, wherein a static contact and a moving contact are provided in the vacuum interrupter chamber, and the static contact is electrically connected to the isolating contact;

[0011] A transmission mechanism, comprising a transmission assembly, a first elastic member, and a limit member, wherein the limit member is disposed on the insulating housing, the transmission assembly is connected to the moving contact, and when driven, the transmission assembly can drive the moving contact to move relative to the static contact, thereby realizing the opening and closing of the vacuum arc extinguishing mechanism;

[0012] When the isolating knife switch rotates in the first rotation direction, it contacts and drives the transmission assembly, so that the transmission assembly drives the moving contact to separate from the static contact. After the moving contact and the static contact are completely separated, the transmission assembly reaches a balance under the joint action of the first elastic member and the limiting member, so that the moving contact and the static contact remain separated.

[0013] When the isolating knife switch rotates along the second rotation direction, it contacts and disturbs the transmission assembly, so that the transmission assembly drives the moving contact and the static contact to gradually engage until the closing is completed, and before the moving contact and the static contact engage, the isolating knife switch has already engaged with the isolating contact.

[0014] Optionally, the transmission assembly includes:

[0015] a first connecting rod, one end of which is rotatably connected to the insulating housing, and a middle portion of the first connecting rod is hinged to the moving contact;

[0016] a second connecting rod, one end of the second connecting rod being hinged to the other end of the first connecting rod;

[0017] a rotating member, the other end of the second connecting rod being hinged to the rotating member, the rotating member being rotatably connected to the insulating housing, one end of the first elastic member being connected to the insulating housing, and the other end being connected to a side of the rotating member away from the second connecting rod;

[0018] The isolating knife switch is capable of driving the rotating member to rotate in the process of rotating along the first rotation direction, so that the rotating member drives the first connecting rod to rotate through the second connecting rod, and then the first connecting rod pulls the moving contact and the static contact to gradually separate. After the moving contact and the static contact are completely separated, the second connecting rod or the rotating member abuts against the limiting member;

[0019] The isolating knife switch can drive the rotating member to rotate during the rotation along the second rotation direction, so that the rotating member drives the first connecting rod to rotate through the second connecting rod, and then the first connecting rod pulls the moving contact and the static contact to gradually engage.

[0020] Optionally, a guiding hole is provided on the rotating member, a first pin shaft is provided at one end of the second connecting rod connected to the rotating member, and the first pin shaft is slidably connected to the guiding hole. During the process that the isolating switch rotates along the first rotation direction from contacting the rotating member to separating from the isolating contact, the first pin shaft slides in the guiding hole without actuating the second connecting rod.

[0021] Optionally, a conductive support arm and an insulating support arm are provided on the rotating member. The other end of the second connecting rod is hinged to the conductive support arm. The isolating switch cooperates with the conductive support arm during the process of rotating along the first rotation direction, and the isolating switch cooperates with the insulating support arm during the process of rotating along the second rotation direction.

[0022] Optionally, the rotating member is in a "C" shape like a storage cabinet, and the conductive support arm and the insulating support arm are arranged to be of unequal lengths.

[0023] Optionally, the rotating member includes a conductive support and an insulating support; a connecting column is provided at one end of the conductive support, a first connecting hole penetrating along its thickness direction is provided at the end of the conductive support where the connecting column is provided, and the conductive support arm is provided at the other end of the conductive support;

[0024] A slot is provided at one end of the insulating support for inserting the connecting column. On the insulating support, connecting ears are provided on opposite sides of the slot, and second connecting holes are provided on the connecting ears. The end of the conductive support where the first connecting hole is provided is clamped between the two connecting ears, and the first connecting hole is correspondingly arranged with the two second connecting holes;

[0025] Two spaced connecting plates are provided on the insulating housing, and the two connecting plates are respectively connected to both ends of a second pin shaft. The second pin shaft penetrates through the first connecting hole and the two second connecting holes, and the rotating member can rotate around the second pin shaft.

[0026] Optionally, two connecting support arms are further provided on the insulating support. The two connecting support arms are respectively arranged on opposite sides of the insulating support, and a first elastic member is correspondingly arranged for each connecting support arm. One end of the first elastic member is connected to the connecting support arm, and the other end is connected to the insulating housing.

[0027] Optionally, the transmission mechanism further includes a second elastic member. One end of the second elastic member is connected to the insulating housing, and the other end is connected to the transmission component. The second elastic member is configured to always have a tendency to drive the transmission component to drive the moving contact to engage with the static contact.

[0028] Optionally, the isolation knife switch is connected to an isolation main shaft, and the isolation main shaft is used to drive the isolation knife switch to rotate, and an insulating protective cover is provided outside the isolation main shaft and part of the isolation knife switch.

[0029] According to another aspect of the present invention, the present invention provides a switchgear, comprising a cabinet and a vacuum parallel switch device according to any one of the above technical solutions, wherein the vacuum parallel switch device is arranged in the cabinet.

[0030] The beneficial effects of the present invention are:

[0031] The present invention provides a vacuum parallel switch device, comprising an isolating contact, a vacuum arc extinguishing mechanism, a transmission mechanism, and an isolating knife switch. When the isolating knife switch rotates in a first rotational direction and disengages from the isolating contact, the isolating knife switch first contacts the transmission assembly, transferring current to the vacuum arc extinguishing mechanism through the transmission assembly. The transmission mechanism then drives the moving contact and the static contact in the vacuum arc extinguishing mechanism to gradually separate, generating an arc within the vacuum arc extinguishing chamber. The arc is extinguished by the vacuum, thereby improving the safety and reliability of the opening operation. As the isolating knife switch further rotates, the moving contact moves to an opening position away from the static contact. The transmission assembly then reaches equilibrium under the action of a first elastic member and a limit member, i.e., the transmission assembly remains stationary at this time, thereby maintaining the opening of the vacuum arc extinguishing mechanism. This opening state is not released until the isolating knife switch rotates in a second rotational direction to close to the isolating contact. With this arrangement, when the isolating knife switch rotates to a position closer to the vacuum arc extinguishing mechanism during the closing operation, discharge will not occur between the vacuum arc extinguishing mechanism and the vacuum arc extinguishing mechanism because the vacuum arc extinguishing mechanism is in the opening state, thereby improving the safety and reliability of the closing operation.

[0032] The transmission assembly is limited by the cooperation of the first elastic member and the limiting member, so that the reliability of the opening and maintaining of the vacuum arc extinguishing mechanism is better.

[0033] When the isolating knife switch rotates along the second rotation direction to drive the transmission assembly, the transmission assembly can be simultaneously acted upon by the first elastic member and the isolating knife switch to push the moving contact to engage with the static contact, thereby reducing the risk of the vacuum arc extinguishing mechanism failing to close.

[0034] The present invention also provides a switchgear comprising a cabinet and the aforementioned vacuum parallel switch device. Due to the adoption of the aforementioned vacuum parallel switch device, the switchgear has better safety and reliability in opening and closing operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic structural diagram of a vacuum parallel switch device provided in an embodiment of the present invention;

[0036] Figure 2 for Figure 1 Enlarged view at point A;

[0037] Figure 3 A schematic diagram of the coordination between the vacuum arc extinguishing mechanism and the transmission mechanism provided in an embodiment of the present invention;

[0038] Figure 4 A schematic structural diagram of a rotating member provided in an embodiment of the present invention;

[0039] Figure 5 An exploded schematic diagram of a rotating member from one perspective provided by an embodiment of the present invention;

[0040] Figure 6 An exploded schematic diagram of a rotating member from another perspective provided by an embodiment of the present invention;

[0041] Figure 7-11 A schematic diagram of the opening process of a vacuum parallel switch device provided in an embodiment of the present invention;

[0042] Figure 12-15 A schematic diagram of the closing process of a vacuum parallel switch device provided in an embodiment of the present invention.

[0043] In the picture:

[0044] 10. Main busbar; 20. Isolation spindle; 30. Casing;

[0045] 100. Isolating contacts;

[0046] 200, vacuum arc extinguishing mechanism; 210, insulating housing; 211, connecting plate; 212, second pin; 213, supporting plate; 220, static contact; 230, moving contact;

[0047] 300, transmission mechanism; 310, transmission assembly; 311, first connecting rod; 312, second connecting rod; 313, rotating member; 3130, guide hole; 3131, conductive bracket; 31311, conductive arm; 31312, connecting column; 31313, first connecting hole; 3132, insulating bracket; 31321, insulating arm; 31322, slot; 31323, connecting ear; 31324, second connecting hole; 3133, connecting arm; 320, first elastic member; 330, limiting member; 340, first pin; 350, second elastic member;

[0048] 400, isolation switch;

[0049] 500. Insulation protective cover. DETAILED DESCRIPTION

[0050] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0051] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0052] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0053] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0054] This embodiment provides a vacuum parallel switch device, which can transfer current to a vacuum arc extinguishing mechanism through a transmission mechanism, and extinguish the arc through the vacuum arc extinguishing mechanism, thereby improving the safety and reliability of the opening operation, and can achieve the opening maintenance after vacuum arc extinguishing, avoiding the risk of discharge between the isolation knife switch and the transmission mechanism, and improving the safety and reliability of the closing operation.

[0055] Specifically, if Figure 1-Figure 3 、 Figure 7-Figure 15 As shown, the vacuum parallel switch device 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 can rotate in a first rotational direction to disengage and move away from the isolating contact 100, and can rotate in a second rotational direction to move closer to and engage with the isolating contact 100. It will be 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 is closed; when the isolating switch 400 disengages from the isolating contact 100, the main circuit current is disconnected. It will be understood that the first rotational direction is opposite to the second rotational direction. In this embodiment, the first rotational direction is counterclockwise, and the second rotational 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 is provided with a static contact 220 and a movable contact 230. The static contact 220 is electrically connected to the isolating contact 100. When the vacuum parallel switch device is opened, the current is transferred to the vacuum arc extinguishing mechanism 200 through the isolating knife switch 400. The vacuum arc extinguishing mechanism 200 extinguishes the arc generated during opening, thereby ensuring operational safety even when air is used as the insulating gas. Optionally, in one possible embodiment, the static contact 220 can be electrically connected to the isolating contact 100 via the main busbar 10, that is, both the static 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.

[0058] The transmission mechanism 300 includes a transmission assembly 310, a first elastic member 320, and a limit member 330. The limit member 330 is provided on the insulating housing 210, and the transmission assembly 310 is connected to the moving contact 230. The transmission assembly 310 is used to drive the moving contact 230 to separate or engage with the static contact 220 under the drive of an external force, thereby realizing the opening or closing of the vacuum arc extinguishing mechanism 200. The limit member 330 is used to abut against the transmission assembly 310 to limit the movement of the transmission assembly 310. The first elastic member 320 is used to keep the transmission assembly 310 in a position abutting against the limit member 330, and to assist the transmission assembly 310 in driving the moving contact 230 to engage with the static contact 220.

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

[0060] The isolation knife switch 400 rotates in the first direction ( Figure 1During the process of rotating (counterclockwise) and disengaging from the isolating contact 100, the isolating knife switch 400 will first contact the transmission component 310, and transfer the current to the vacuum arc extinguishing mechanism 200 through the transmission component 310. Then, by driving the transmission component 310 to move, the transmission component 310 pulls the moving contact 230 and the static contact 220 in the vacuum arc extinguishing mechanism 200 to gradually separate. When the moving contact 230 is separated from the static contact 220, an arc will be generated. Since the arc is generated in the vacuum arc extinguishing chamber, it can be reliably extinguished by vacuum. Compared with the prior art in which the arc is generated between the isolating knife 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. Moreover, after the moving contact 230 and the static contact 220 are separated, the transmission assembly 310 reaches a balance under the joint action of the first elastic member 320 and the limit member 330, that is, the transmission assembly 310 remains stationary, and the moving contact 230 connected to the transmission assembly 310 remains in the position of being disconnected from the static contact 220, so that the vacuum arc extinguishing mechanism 200 can always maintain the disconnected state.

[0061] The isolation knife switch 400 rotates in the second direction ( Figure 1 In the process of rotating (in the clockwise direction) to engage with the isolating contact 100, the isolating knife switch 400 can contact the transmission assembly 310 again to disturb the transmission assembly 310, that is, drive the transmission assembly 310 to move, so that the transmission assembly 310 drives the moving contact 230 and the static contact 220 to gradually engage until the closing is completed, and, before the moving contact 230 engages with the static contact 220, the isolating knife switch 400 has been engaged with the isolating contact 100, that is, the open state of the vacuum arc extinguishing mechanism 200 is not released until the isolating knife switch 400 engages with the isolating contact 100. With this arrangement, when the isolating knife switch 400 is rotated to a position closer to the vacuum arc extinguishing mechanism 200 during the closing operation, discharge will not occur between the isolating knife switch 400 and the vacuum arc extinguishing mechanism 200 because the vacuum arc extinguishing mechanism 200 is in the open state, thereby improving the safety and reliability of the closing of the vacuum parallel switch device.

[0062] It is understandable that the first elastic member 320 can also drive the moving contact 230 to gradually approach the static contact 220 through the elastic force driving transmission assembly 310, so that the moving contact 230 can quickly engage with the static contact 220, reducing the risk of the vacuum arc extinguishing mechanism 200 failing to close.

[0063] The movement of the transmission assembly 310 is limited by the first elastic member 320 and the limiting member 330 , so that the reliability of the opening and maintaining of the vacuum interrupter mechanism 200 is better.

[0064] Alternatively, in one possible embodiment, the movable contact 230 in the vacuum interrupter can engage with the static contact 220 under the action of a self-closing force when not subject to external force. Therefore, when the isolation switch 400 rotates in the second rotational direction, the movable contact 230 can be driven by both the transmission assembly 310 and the self-closing force to engage with the static contact 220, thereby reducing the risk of closing failure of the vacuum interrupter mechanism 200.

[0065] Optionally, continue with Figure 1-Figure 3 The transmission assembly 310 includes a first connecting rod 311, a second connecting rod 312, and a rotating member 313. One end of the first connecting rod 311 is rotatably connected to the insulating housing 210, and the middle part of the first connecting rod 311 is hinged to the moving contact 230. One end of the second connecting rod 312 is hinged to 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 313. The rotating member 313 is rotatably connected to the insulating housing 210, and the isolating knife switch 400 cooperates with the rotating member 313 during the rotation along the first rotation direction or the second rotation direction. In this embodiment, the hinge point between the second connecting rod 312 and the rotating member 313 is located on the side of the rotation center of the rotating member 313 close to the second connecting rod 312.

[0066] Specifically, the connection between the first connecting rod 311 and the insulating housing 210 is Figure 1 The hinge point of the first connecting rod 311 and the moving contact 230 is at point a in FIG1 , and the hinge point of the first connecting rod 311 and the second connecting rod 312 is at point b in FIG1 . Figure 1 At point c in the figure, the hinge between the second connecting rod 312 and the rotating member 313 is Figure 1 At point d in the figure, the connection between the rotating member 313 and the insulating housing 210 is Figure 1 The configuration, arrangement and connection of the first connecting rod 311, the second connecting rod 312 and the rotating member 313 form a four-bar linkage, which has a simple structure and reliable force transmission.

[0067] Optionally, continue with Figure 1-Figure 3 In this embodiment, one end of the first elastic member 320 is connected to the insulating housing 210, and the other end is connected to the side of the rotating member 313 away from the second connecting rod 312, that is, the hinge point d between the second connecting rod 312 and the rotating member 313 and the connection point f between the first elastic member 320 and the rotating member 313 are respectively arranged on both sides of the rotation center of the rotating member 313.

[0068] Continue to see Figure 1 When the first elastic member 320 is located above the rotation center of the rotating member 313, the first elastic member 320 always has a tendency to rotate the rotating member 313 along the first rotation direction and approach the insulating housing 210. Figure 11When the first elastic member 320 is located below the rotation center of the rotating member 313 , the first elastic member 320 always has a tendency to cause the rotating member 313 to rotate along the second rotation direction to approach the insulating housing 210 .

[0069] For ease of understanding, the working process of the transmission mechanism 300 is briefly introduced (taking the first rotation direction as counterclockwise and the second rotation direction as clockwise as an example):

[0070] like Figure 1 、 Figure 7-12 As shown, the isolating knife switch 400 first contacts the rotating member 313 during the counterclockwise rotation, driving the rotating member 313 to rotate clockwise with point e as the center. The clockwise rotation of the rotating member 313 will cause the first connecting rod 311 to rotate clockwise with point a as the center through the second connecting rod 312. The clockwise rotation of the first connecting rod 311 will pull the moving contact 230 outward, so that the moving contact 230 and the static contact 220 are gradually separated. After the moving contact 230 and the static contact 220 are completely separated ( The moving contact 230 moves to a distance with the static contact 220 that is a specified opening distance), and the rotating member 313 or the second connecting rod 312 rotates to abut against the limit member 330, restricting the rotating member 313 or the second connecting rod 312 from continuing to rotate. At this time, the first elastic member 320 applies a pulling force to the rotating member 313. Since the rotating member 313 or the second connecting rod 312 abuts against the limit member 330, the first connecting rod 311, the second connecting rod 312 and the rotating member 313 can remain stationary, so as to achieve the opening maintenance of the vacuum arc extinguishing mechanism 200.

[0071] It can be understood that the position where the rotating member 313 or the second connecting rod 312 abuts against the limit member 330 can be designed as the dead point position of the four-bar mechanism formed by the first connecting rod 311, the second connecting rod 312 and the rotating member 313 to improve the reliability of the vacuum arc extinguishing mechanism 200 in maintaining the opening position.

[0072] like Figure 1 、 Figure 13-15 As shown, when the isolating knife switch 400 rotates in the clockwise direction, the driving rotating member 313 rotates in the counterclockwise direction with point e as the center. The counterclockwise rotation of the rotating member 313 causes the first connecting rod 311 to rotate in the counterclockwise direction with point a as the center through the second connecting rod 312. The counterclockwise rotation of the first connecting rod 311 pushes the moving contact 230 inward, causing the moving contact 230 to gradually approach the static contact 220 until the moving contact 230 engages with the static contact 220, and the transmission mechanism 300 returns to its initial position. At the same time, during this process, the first elastic member 320 can pull the rotating member 313 to rotate in the counterclockwise direction through its elastic restoring force, and then assist the first connecting rod 311 in pushing the moving contact 230 to quickly engage with the static contact 220 through the connecting rod transmission principle, thereby improving the reliability of the successful closing of the vacuum arc extinguishing mechanism 200.

[0073] In this embodiment, the second connecting rod 312 can abut against the limiting component 330 .

[0074] Further, see Figure 2 and Figure 3 A guide hole 3130 is provided on the rotating member 313, and a first pin 340 is provided at one end of the second connecting rod 312 connected to the rotating member 313. The first pin 340 slides through the guide hole 3130. When the isolation knife switch 400 rotates along the first rotation direction and starts to contact the rotating member 313 and separates from the isolation contact 100, the first pin 340 slides in the guide hole 3130 without actuating the second connecting rod 312, that is, the second connecting rod 312 remains stationary.

[0075] It can be understood that when the isolating knife switch 400 begins to contact the rotating part 313, the current begins to transfer from the main circuit connected to the isolating contact 100 to the vacuum arc extinguishing mechanism 200, until the isolating knife switch 400 is separated from the isolating contact 100, and the main circuit current is completely transferred to the vacuum arc extinguishing mechanism 200. During this process, the first pin shaft 340 slides in the guide hole 3130, so that the second connecting rod 312 remains stationary. If the second connecting rod 312 remains stationary, the first connecting rod 311 also remains stationary, and the moving contact 230 connected to the first connecting rod 311 also remains stationary, so that the vacuum arc extinguishing mechanism 200 remains in a closed state during the current transfer process, which is beneficial to improving the smoothness of the current transfer.

[0076] Further, see Figure 2 and Figure 3 The rotating member 313 is provided with a conductive arm 31311 and an insulating arm 31321. The other end of the second connecting rod 312 is hinged to the conductive arm 31311. It is understood that both the first connecting rod 311 and the second connecting rod 312 are conductive, so that the current of the isolation switch 400 can be transmitted to the movable contact 230 through the conductive arm 31311, the second connecting rod 312, and the first connecting rod 311 in sequence.

[0077] Specifically, when the isolating switch 400 rotates in the first rotational direction, it cooperates with the conductive arm 31311, so that the current is transferred to the movable contact 230 through the conductive arm 31311, the second connecting rod 312, and the first connecting rod 311. When the isolating switch 400 rotates in the second rotational direction, it cooperates with the insulating arm 31321 to prevent the transfer of current. In this way, the risk of discharge between the isolating switch 400 and the vacuum interrupter mechanism 200 can be reduced, and the stability of the closing operation can be improved.

[0078] Optionally, continue with Figure 1 and Figure 2, in a possible embodiment, the rotating member 313 is in a shape similar to a "匚", with a simple structure and being easy to process. Moreover, the conductive support arm 31311 and the insulating support arm 31321 are set to be of unequal lengths. With such a setting, it is convenient for the disconnecting switch 400 to cooperate with the conductive support arm 31311 and the insulating support arm 31321.

[0079] Optionally, continue to refer to Figure 2-Figure 6 , in a possible embodiment, the rotating member 313 includes a conductive support 3131 and an insulating support 3132. Specifically, one end of the conductive support 3131 is provided with a connecting column 31312, and a first connecting hole 31313 penetrating through in the thickness direction is provided at the end of the conductive support 3131 where the connecting column 31312 is provided. The other end of the conductive support 3131 is provided with a conductive support arm 31311. One end of the insulating support 3132 is provided with a slot 31322 for inserting and connecting with the connecting column 31312. On the insulating support 3132, connecting ears 31323 are provided on opposite sides of the slot 31322, and second connecting holes 31324 are provided on the connecting ears 31323. The end of the conductive support 3131 where the first connecting hole 31313 is provided is clamped between the two connecting ears 31323, and the first connecting hole 31313 and the two second connecting holes 31324 are correspondingly arranged. Two spaced connecting plates 211 are provided on the insulating housing 210, and the two connecting plates 211 are respectively connected to the two ends of the second pin shaft 212. The second pin shaft 212 passes through the first connecting hole 31313 and the two second connecting holes 31324, and the rotating member 313 can rotate around the second pin shaft 212.

[0080] The conductive support 3131 and the insulating support 3132 of the rotating member 313 are connected both by the insertion connection of the connecting column 31312 and the slot 31322 and by the second pin shaft 212. With such a setting, it not only improves the connection reliability between the conductive support 3131 and the insulating support 3132, but also realizes the rotational connection between the rotating member 313 and the insulating housing 210, simplifying the structure of the components.

[0081] Optionally, continue to refer to Figure 3-Figure 6 , two connecting support arms 3133 are further provided on the insulating support 3132. The two connecting support arms 3133 are respectively arranged on opposite sides of the insulating support 3132, and a first elastic member 320 is correspondingly arranged for each connecting support arm 3133. One end of the first elastic member 320 is connected to the connecting support arm 3133, and the other end is connected to the insulating housing 210. Fixing the first elastic member 320 through the connecting support arm 3133 has a simple structure and is beneficial to improving the structural strength of the rotating member 313. Moreover, by providing two first elastic members 320, it is beneficial to improve the force uniformity of the rotating member 313, thereby improving the smoothness of the rotation of the rotating member 313.

[0082] Furthermore, continue to refer to Figure 1 and Figure 3 The transmission mechanism 300 also includes a second elastic member 350, one end of the second elastic member 350 is connected to the insulating housing 210, and the other end is connected to the transmission assembly 310. The second elastic member 350 is configured to always have a tendency to drive the transmission assembly 310 to drive the moving contact 230 to engage with the static contact 220.

[0083] Optionally, continue with Figure 3 In a possible embodiment, a support plate 213 is provided on the insulating housing 210, and the support plate 213 is located on the side of the first connecting rod 311 away from the moving contact 230. The second elastic member 350 is a compression spring, one end of the compression spring is connected to the support plate 213, and the other end is connected to the end of the first connecting rod 311 close to the second connecting rod 312.

[0084] By providing the second elastic member 350 , the reliability of successful closing of the vacuum arc extinguishing mechanism 200 is further improved.

[0085] Optionally, continue with Figure 1 The isolation switch 400 is connected to the isolation spindle 20, which is used to drive the isolation switch 400 to rotate. The insulation shield 500 is set outside the isolation spindle 20 and part of the isolation switch 400. The insulation shield 500 can play a role in strengthening insulation and reducing the discharge risk of the isolation switch 400.

[0086] Optionally, continue with Figure 1 In this embodiment, the vacuum interrupter mechanism 200 is arranged at an angle, with the transmission mechanism 300 located between the vacuum interrupter mechanism 200 and the isolation switch 400. This arrangement, on the one hand, reduces the vertical space occupied by the vacuum interrupter mechanism 200; on the other hand, it places the transmission mechanism 300 closer to both the vacuum interrupter mechanism 200 and the isolation switch 400, thereby improving the compactness of the transmission mechanism 300.

[0087] In order to facilitate understanding, the working process of the vacuum parallel switch device is briefly introduced:

[0088] Opening process:

[0089] like Figure 1 As shown, the isolation switch 400 is in a position engaged with the isolation contact 100, the main circuit is connected, and the vacuum interrupter mechanism 200 is in a closed state under the pulling force and self-closing force of the first elastic member 320;

[0090] like Figure 7As shown, the isolation switch 400 rotates counterclockwise under the drive of the isolation main shaft 20 until it contacts the conductive arm 31311 on the rotating member 313, and at this time, the isolation switch 400 partially maintains contact with the isolation contact 100. At this time, part of the current in the main circuit is transferred to the vacuum interrupter mechanism 200 to form a parallel circuit;

[0091] like Figure 8 As shown, as the isolation knife switch 400 further rotates counterclockwise and gradually separates from the isolation contact 100, the isolation knife switch 400 pushes the conductive support arm 31311 to rotate the rotating member 313 in the clockwise direction. The clockwise rotation of the rotating member 313 causes the first rotating shaft 340 to slide in the guide hole 3130 until the isolation knife switch 400 separates from the isolation contact 100 and moves to a safe distance from the isolation contact 100. The hole wall of the guide hole 3130 abuts against the first pin 340, that is, the sliding stroke of the first pin 340 in the guide hole 3130 ends, and the main circuit current passes through the isolation knife switch 400 and the vacuum interrupter mechanism 200 to form a single circuit state.

[0092] like Figure 9 and Figure 10 As shown, as the isolation knife switch 400 further rotates in the counterclockwise direction, the isolation knife switch 400 continues to push the conductive support arm 31311 to rotate the rotating member 313 in the clockwise direction. The clockwise rotation of the rotating member 313 drives the first connecting rod 311 to rotate in the clockwise direction through the second connecting rod 312. The clockwise rotation of the first connecting rod 311 drives the moving contact 230 to gradually move away from the static contact 220. During this process, the first elastic member 320 can pull the rotating member 313 to rotate in the clockwise direction through elastic force, thereby assisting the movement of the transmission mechanism 300.

[0093] like Figure 11 As shown, as the isolating knife switch 400 further rotates in the counterclockwise direction, the isolating knife switch 400 continues to drive the rotating member 313 to rotate in the clockwise direction through the conductive support arm 31311, and the moving contact 230 continues to move away from the static contact 220. After the second connecting rod 312 abuts against the limiting member 330, the rotating member 313 stops rotating, and the isolating knife switch 400 is about to separate from the conductive support arm 31311. The opening distance between the moving contact 230 and the static contact 220 meets the specified opening distance, and the vacuum arc extinguishing mechanism 200 is opened. At the same time, under the action of the first elastic member 320 and the limiting member 330, the first connecting rod 311, the second connecting rod 312 and the rotating member 313 remain stationary, thereby maintaining the opening of the vacuum arc extinguishing mechanism 200.

[0094] like Figure 12As shown, as the isolating knife switch 400 further rotates in the counterclockwise direction, the isolating knife switch 400 is separated from the conductive support arm 31311, and the vacuum arc extinguishing mechanism 200 always remains in the open state, and the opening of the vacuum parallel switch device is completed.

[0095] Closing process:

[0096] like Figure 13 As shown, the isolation knife switch 400 is driven by the isolation main shaft 20 to rotate in the clockwise direction until it contacts the insulating support arm 31321 on the rotating member 313;

[0097] like Figure 14 As shown, as the isolation knife switch 400 further rotates in the clockwise direction, the isolation knife switch 400 pushes the rotating member 313 to rotate in the counterclockwise direction through the insulating support arm 31321. The counterclockwise rotation of the rotating member 313 drives the first connecting rod 311 to rotate in the counterclockwise direction through the second connecting rod 312. The counterclockwise rotation of the first connecting rod 311 pushes the moving contact 230 and the static contact 220 to gradually engage. At the same time, the first elastic member 320 can also pull the rotating member 313 to rotate in the counterclockwise direction under the action of the elastic restoring force.

[0098] like Figure 15 As shown, as the isolating knife switch 400 rotates further in the clockwise direction, the isolating knife switch 400 will first contact the isolating contact 100, and then continue to drive the rotating part 313 to rotate through the insulating support arm 31321 until it is finally separated from the insulating support arm 31321. The moving contact 230 engages with the static contact 220, that is, the vacuum arc extinguishing mechanism 200 is closed after the isolating knife switch 400 engages with the isolating contact 100 to reduce the discharge risk between the isolating knife switch 400 and the vacuum arc extinguishing mechanism 200. When the isolating knife switch 400 is rotated into place, the closing of the vacuum parallel switch device is completed.

[0099] This embodiment further provides a switch device, including a cabinet and the above-mentioned vacuum parallel switch device, wherein the vacuum parallel switch device is arranged in the cabinet.

[0100] Since the switchgear adopts the above-mentioned vacuum parallel switch device, the safety and reliability of opening and closing operations are better.

[0101] Optionally, continue with Figure 1 and Figure 2 In this embodiment, both ends of the main busbar 10 are installed on the side walls of the cabinet through bushings 30 .

[0102] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Vacuum parallel switch device, characterized in that: include: Isolating contacts (100); An isolating knife switch (400) capable of rotating in a first rotation direction to disengage from and away from the isolating contact (100), and capable of rotating in a second rotation direction to approach and engage with the isolating contact (100); A vacuum interrupter mechanism (200) comprises an insulating housing (210) and a vacuum interrupter chamber installed in the insulating housing (210), wherein a static contact (220) and a moving contact (230) are provided in the vacuum interrupter chamber, and the static contact (220) is electrically connected to the isolating contact (100); A transmission mechanism (300) comprises a transmission assembly (310), a first elastic member (320) and a limiting member (330), wherein the limiting member (330) is arranged on the insulating housing (210), the transmission assembly (310) is connected to the moving contact (230), and when driven, the transmission assembly (310) can drive the moving contact (230) to move relative to the static contact (220), thereby realizing the opening and closing of the vacuum arc extinguishing mechanism (200); When the isolating knife switch (400) rotates along the first rotation direction, it contacts and drives the transmission assembly (310), so that the transmission assembly (310) drives the moving contact (230) to separate from the static contact (220); after the moving contact (230) and the static contact (220) are completely separated, the transmission assembly (310) reaches a balance under the joint action of the first elastic member (320) and the limiting member (330), so that the moving contact (230) and the static contact (220) remain separated; When the isolating knife switch (400) rotates along the second rotation direction, it contacts and disturbs the transmission assembly (310), so that the transmission assembly (310) drives the moving contact (230) and the static contact (220) to gradually engage until the closing is completed, and before the moving contact (230) and the static contact (220) engage, the isolating knife switch (400) has already engaged with the isolating contact (100).

2. The vacuum parallel switch device according to claim 1, characterized in that: The transmission assembly (310) comprises: a first connecting rod (311), one end of the first connecting rod (311) being rotatably connected to the insulating housing (210), and a middle portion of the first connecting rod (311) being hinged to the moving contact (230); a second connecting rod (312), one end of the second connecting rod (312) being hinged to the other end of the first connecting rod (311); A rotating member (313), the other end of the second connecting rod (312) is hinged to the rotating member (313), the rotating member (313) is rotatably connected to the insulating housing (210), one end of the first elastic member (320) is connected to the insulating housing (210), and the other end is connected to a side of the rotating member (313) away from the second connecting rod (312); During the rotation of the disconnecting switch (400) along the first rotation direction, it can drive the rotating member (313) to rotate, so that the rotating member (313) drives the first connecting rod (311) to rotate through the second connecting rod (312). Furthermore, the first connecting rod (311) pulls the moving contact (230) and the static contact (220) to gradually separate. After the moving contact (230) and the static contact (220) are completely separated, the second connecting rod (312) or the rotating member (313) abuts against the limiting member (330). During the rotation of the disconnecting switch (400) along the second rotation direction, it can drive the rotating member (313) to rotate, so that the rotating member (313) drives the first connecting rod (311) to rotate through the second connecting rod (312). Furthermore, the first connecting rod (311) pulls the moving contact (230) and the static contact (220) to gradually engage.

3. The vacuum parallel switch device according to claim 2, characterized in that: A guiding hole (3130) is provided on the rotating member (313). One end of the second connecting rod (312) connected to the rotating member (313) is provided with a first pin shaft (340). The first pin shaft (340) slidably penetrates through the guiding hole (3130). During the process from the start of the contact between the disconnecting switch (400) and the rotating member (313) along the first rotation direction to the separation from the isolating contact (100), the first pin shaft (340) slides in the guiding hole (3130) without actuating the second connecting rod (312).

4. The vacuum parallel switch device according to claim 2, characterized in that: A conductive support arm (31311) and an insulating support arm (31321) are provided on the rotating member (313). The other end of the second connecting rod (312) is hinged to the conductive support arm (31311). During the rotation of the disconnecting switch (400) along the first rotation direction, it cooperates with the conductive support arm (31311). During the rotation of the disconnecting switch (400) along the second rotation direction, it cooperates with the insulating support arm (31321).

5. The vacuum parallel switch device according to claim 4, characterized in that: The rotating member (313) is in a shape similar to a "匚", and the conductive support arm (31311) and the insulating support arm (31321) are set to be of unequal lengths.

6. The vacuum parallel switch device according to claim 4, characterized in that: The rotating member (313) includes a conductive support ( One end of the insulating bracket (3132) is provided with a slot (31322), and the slot (31322) is used to be plugged into the connecting column (31312). On the insulating bracket (3132), connecting ears (31323) are provided on opposite sides of the slot (31322), and the connecting ears (31323) are provided with a second connecting hole (31324). One end of the conductive bracket (3131) provided with the first connecting hole (31313) is clamped between the two connecting ears (31323), and the first connecting hole (31313) and the two second connecting holes (31324) are correspondingly arranged. The insulating housing (210) is provided with two spaced-apart connecting plates (211), the two connecting plates (211) are respectively connected to the two ends of a second pin shaft (212), the second pin shaft (212) is passed through the first connecting hole (31313) and the two second connecting holes (31324), and the rotating member (313) is capable of rotating around the second pin shaft (212).

7. The vacuum parallel switch device according to claim 6, characterized in that: The insulating support (3132) is further provided with two connecting arms (3133), which are respectively arranged on opposite sides of the insulating support (3132), and each connecting arm (3133) is correspondingly provided with a first elastic member (320), one end of the first elastic member (320) is connected to the connecting arm (3133), and the other end is connected to the insulating shell (210).

8. The vacuum parallel switch device according to any one of claims 1 to 7, characterized in that: The transmission mechanism (300) further includes a second elastic member (350), one end of the second elastic member (350) being connected to the insulating housing (210), and the other end being connected to the transmission assembly (310), and the second elastic member (350) being configured to always have a tendency to drive the transmission assembly (310) to drive the moving contact (230) to engage with the static contact (220).

9. The vacuum parallel switch device according to any one of claims 1 to 7, characterized in that: The isolation knife switch (400) is connected to the isolation main shaft (20), and the isolation main shaft (20) is used to drive the isolation knife switch (400) to rotate. The insulation protection cover (500) is arranged outside the isolation main shaft (20) and part of the isolation knife switch (400).

10. A switchgear, characterized in that The invention comprises a cabinet and a vacuum parallel switch device according to any one of claims 1 to 9, wherein the vacuum parallel switch device is arranged in the cabinet.

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