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, an isolation disconnecting link, a vacuum arc extinguishing mechanism and a transmission mechanism. The transmission mechanism comprises a transmission piece, a locking piece and a linkage piece. The isolation disconnecting link can drive the transmission part to rotate in the process of rotating in the first rotating direction, so that the transmission part drives the first lock catch to gradually get close to the second lock catch while driving the moving contact and the static contact to be gradually separated, and after the moving contact and the static contact are separated, the first lock catch is locked to the second lock catch. When the isolation disconnecting link rotates in the second rotation direction, the linkage piece can be driven to drive the second lock catch to be separated from the first lock catch, then the moving contact and the static contact are gradually connected, and before the moving contact and the static contact are connected, the isolation disconnecting link is connected with the isolation contact. The vacuum parallel switch device is good in safety of switching-on and switching-off operation.

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] The vacuum parallel switch device is characterized by comprising:

[0008] Isolating contacts;

[0009] an isolating switch rotatable in a first rotational direction to disengage the isolating contact, and rotatable in a second rotational direction to 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 member, a locking member, and a linkage member, wherein the transmission member is rotatably connected to the insulating housing, one end of the transmission member is hinged to the moving contact, and the other end is provided with a first lock catch, the locking member is rotatably connected to the insulating housing, the locking member is provided with a second lock catch, and one end of the linkage member is fixedly connected to the locking member, and the linkage member can drive the second lock catch to rotate to a locked position locked with the first lock catch under the action of gravity, and the linkage member can also drive the second lock catch to rotate to an unlocked position separated from the first lock catch when driven;

[0012] During the process of rotating the isolating knife switch along the first rotation direction, the isolating knife switch contacts and drives the transmission member to rotate, so that the transmission member drives the moving contact and the static contact to gradually separate while also driving the first lock catch to gradually approach the second lock catch, and after the moving contact and the static contact are completely separated, the first lock catch is locked to the second lock catch located in the locked position, so that the transmission member drives the moving contact and the static contact to remain separated;

[0013] During the process of rotating the isolating knife switch along the second rotation direction, the isolating knife switch contacts and drives the linkage to move, so that the linkage drives the second lock catch to separate and unlock from the first lock catch, and then the moving contact and the static contact are gradually engaged, and before the moving contact and the static contact are completely engaged, the isolating knife switch has been engaged with the isolating contact.

[0014] Optionally, a locking block is provided on the other end of the transmission member, the first lock buckle is a first locking hook provided on the locking block, and a first arc surface is provided on a side wall of the first locking hook close to the locking member;

[0015] The second lock buckle is a second lock hook provided on the locking member, and a second arc surface is provided on the side wall of the second lock hook close to the locking block;

[0016] During the process of the locking block rotating toward the locking member, the first arc surface cooperates with the second arc surface to drive the locking member to rotate until the first lock hook moves into place, and the linkage member drives the second lock hook to be engaged in the first lock hook under the action of gravity.

[0017] Optionally, the transmission mechanism further includes a first elastic member, one end of which is connected to the insulating shell, and the other end is connected to the locking member, and the first elastic member is configured to always have a tendency to drive the second lock to rotate from the unlocked position to the locked position.

[0018] Optionally, a connecting arm is provided on the insulating shell, and an end of the connecting arm is rotatably connected to the locking member.

[0019] Optionally, the linkage part includes a linkage portion and two connecting arms, the linkage part is used to cooperate with the isolation knife switch, the two connecting arms are arranged on opposite sides of the linkage part, one end of the connecting arm away from the linkage part is connected to the locking part, and the two connecting arms are arranged on opposite sides of the locking part.

[0020] Optionally, the vacuum parallel switch device further includes a second elastic member, one end of which is connected to the transmission member, and the other end is connected to the insulating shell, and the second elastic member is configured to always have a tendency to push the first lock to rotate in a direction away from the second lock.

[0021] Optionally, a first conductive arm and a second conductive arm are provided at the other end of the transmission member, and elastic conductive members are provided on opposite sides of the first conductive arm;

[0022] The isolation knife switch includes two conductive plates arranged at intervals, and the conductive plates are arranged in a one-to-one correspondence with the elastic conductive parts. During the rotation of the isolation knife switch along the first rotation direction, the conductive plates first slide and electrically connect to the corresponding elastic conductive parts until they are separated from the isolation contacts. After that, the two conductive plates contact the second conductive support arms at the same time, and push the transmission member to rotate through the second conductive support arms.

[0023] Optionally, the elastic conductive member is a watchband contact finger, and contacts are provided on the opposite surfaces of the two conductive plates, and the contacts can be slidably electrically connected to the watchband contact finger.

[0024] 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.

[0025] According to another aspect of the present invention, the present invention further 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.

[0026] The beneficial effects of the present invention are:

[0027] The present invention provides a vacuum parallel switch device, comprising an isolating contact, an isolating knife switch, a vacuum arc extinguishing mechanism and a transmission mechanism. In the process of the isolating knife switch rotating along a first rotation direction to disengage and move away from the isolating contact, the isolating knife switch will first contact an end of the transmission member provided with a first lock buckle, transfer the current to the vacuum arc extinguishing mechanism through the transmission member, and then continue to rotate and drive the transmission member to rotate. The rotation of the transmission member will drive the moving contact and the static contact to gradually separate, so that the arc is generated in the vacuum arc extinguishing chamber, and the arc is extinguished by vacuum, thereby improving the safety and reliability of the opening operation. At the same time, in the process of the moving contact and the static contact gradually separating, the first lock buckle gradually approaches the second lock buckle, and after the moving contact and the static contact are completely separated (the moving contact moves to the point of contact with the static contact), ... The distance between the heads is the specified opening distance), the first lock catch and the second lock catch are locked. The locking of the first lock catch and the second lock catch will keep the transmission member stationary, and then the transmission member drives the moving contact and the static contact to remain separated, so as to realize the opening maintenance of the vacuum arc extinguishing mechanism, and the opening state of the vacuum arc extinguishing mechanism will not be released until the isolating knife switch is rotated along the second rotation direction to engage with the isolating contact. With this arrangement, when the isolating knife switch is closed and rotated to a position closer to the vacuum arc extinguishing mechanism, 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.

[0028] The vacuum arc extinguishing mechanism is kept open by locking the first lock buckle and the second lock buckle, and the first lock buckle and the second lock buckle are unlocked by cooperating with the isolation knife switch and the linkage part. The control is convenient and smooth, and the structure is simple.

[0029] 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

[0030] Figure 1 A schematic structural diagram of a vacuum parallel switch device provided in an embodiment of the present invention;

[0031] Figure 2 A partial cross-sectional view of the vacuum arc extinguishing mechanism provided by an embodiment of the present invention in a closed state;

[0032] Figure 3 A schematic diagram of a transmission mechanism provided in an embodiment of the present invention;

[0033] Figure 4 An assembly diagram of a locking member and a linkage member provided in an embodiment of the present invention;

[0034] Figure 5-Figure 7 A schematic diagram of the opening process of a vacuum parallel switch device provided in an embodiment of the present invention;

[0035] Figure 8A partial cross-sectional view of the vacuum arc extinguishing mechanism provided by an embodiment of the present invention in an open state;

[0036] Figure 9 and Figure 10 A schematic diagram of the closing process of a vacuum parallel switch device provided in an embodiment of the present invention.

[0037] In the picture:

[0038] 10. Main busbar; 20. Isolation spindle; 30. Casing;

[0039] 100. Isolating contacts;

[0040] 200, vacuum interrupter mechanism; 210, insulating housing; 211, connecting arm; 220, vacuum interrupter chamber; 221, static contact; 222, moving contact;

[0041] 300, transmission mechanism; 310, transmission member; 311, locking block; 3111, first locking catch; 3112, first arc surface; 312, first conductive arm; 3121, groove; 313, second conductive arm; 320, locking member; 321, second locking catch; 322, second arc surface; 323, second slot; 330, linkage member; 331, linkage portion; 332, connecting arm; 340, conductive rod;

[0042] 400, isolation switch;

[0043] 500, second elastic member;

[0044] 600. Insulation protective cover. DETAILED DESCRIPTION

[0045] 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.

[0046] 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 position, be constructed and operated in a specific position, 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 at a higher 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 at a lower level than the second feature.

[0047] 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.

[0048] The following describes embodiments of the present invention in detail. Examples of the embodiments 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.

[0049] 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.

[0050] Specifically, if Figures 1-10 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 .

[0051] 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.

[0052] The vacuum interrupter mechanism 200 includes an insulating housing 210 and a vacuum interrupter chamber 220 mounted within the insulating housing 210. A static contact 221 and a movable contact 222 are located within the vacuum interrupter chamber 220. The static contact 221 is electrically connected to the isolating contact 100. When the vacuum parallel switch device is opened, the current is transferred to the vacuum interrupter mechanism 200 via the isolating knife switch 400. The vacuum interrupter mechanism 200 extinguishes the arc generated during opening, ensuring operational safety even when air is used as the insulating gas. In one possible embodiment, the static contact 221 can be electrically connected to the isolating contact 100 via the main busbar 10. In other embodiments, the electrical connection between the static contact 221 and the isolating contact 100 can be other, depending on actual needs. It is understood that the insulating housing 210 serves as an insulating mounting bracket to facilitate assembly of the vacuum interrupter mechanism 200.

[0053] The transmission mechanism 300 includes a transmission member 310, a locking member 320, and a linkage member 330. The transmission member 310 is rotatably connected to the insulating housing 210. One end of the transmission member 310 is hinged to the moving contact 222, and the other end is provided with a first lock catch 3111. The locking member 320 is rotatably connected to the insulating housing 210 and is provided with a second lock catch 321. One end of the linkage member 330 is fixedly connected to the locking member 320. Under the action of gravity, the linkage member 330 can drive the second lock catch 321 to rotate toward a locked position, where it is locked with the first lock catch 3111. When driven, the linkage member 330 can also drive the second lock catch 321 to rotate toward an unlocked position, where it is separated from the first lock catch 3111. That is, when the linkage member 330 is not subjected to external force, the second lock buckle 321 will rotate to the locked position due to its own gravity, so that the second lock buckle 321 is locked with the first lock buckle 3111; when the linkage member 330 is driven, the linkage member 330 will drive the second lock buckle 321 to rotate so that the second lock buckle 321 is separated from the first lock buckle 3111 to release the lock of the first lock buckle 3111.

[0054] The working principle of the vacuum parallel switch device is as follows:

[0055] When the isolation switch 400 rotates in the first rotation direction to disengage and move away from the isolation contact 100, the isolation switch 400 will first contact the end of the transmission member 310 provided with the first lock 3111, and transfer the current to the vacuum interrupter mechanism 200 through the transmission member 310. As the isolation switch 400 continues to rotate, the isolation switch 400 will drive the transmission member 310 to rotate ( Figure 1 The transmission member 310 rotates counterclockwise), so that the transmission member 310 pulls the moving contact 222 and the static contact 221 in the vacuum arc extinguishing mechanism 200 to gradually separate. When the moving contact 222 and the static contact 221 are separated, an arc is generated. Since the arc is generated in the vacuum arc extinguishing mechanism 200, it can be 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 is extinguished by air, the arc extinguishing effect is better, thereby improving the safety and reliability of the opening operation of the vacuum parallel switch device. When the transmission member 310 pulls the moving contact 222 and the static contact 221 to gradually separate, the first lock buckle 3111 on the transmission member 310 gradually approaches the second lock buckle 321. At the same time, the isolation knife switch 400 gradually moves away from the linkage member 330, so that the linkage member 330 drives the second lock buckle 321 to rotate to the locked position under the action of gravity until the moving contact 222 and the static contact 221 are completely separated (the moving contact 222 moves to a specified distance from the static contact 221). The first lock buckle 3111 is locked with the second lock buckle 321 in the locking position, and then the isolating knife switch 400 continues to rotate and separates from the transmission member 310. That is, after the first lock buckle 3111 and the second lock buckle 321 are locked, the transmission member 310 remains stationary, and then the transmission member 310 pulls the moving contact 222 and the static contact 221 to remain separated, thereby realizing the opening maintenance of the vacuum arc extinguishing mechanism 200, so that the vacuum arc extinguishing mechanism 200 and the transmission member 310 are both in a high-voltage suspension state.

[0056] In the process of the isolation knife gate 400 rotating along the second rotation direction and approaching and engaging with the isolation contact 100, due to the locking of the first lock buckle 3111 and the second lock buckle 321, the isolation knife gate 400 will never contact the transmission member 310. As the isolation knife gate 400 rotates, the isolation knife gate 400 will contact the linkage member 330 and drive the linkage member 330 to move, so that the linkage member 330 drives the second lock buckle 321 to rotate toward the unlocked position, and finally the second lock buckle 321 is separated from the first lock buckle 3111 and unlocked. After the second lock buckle 321 is separated from the first lock buckle 3111, the moving contact 222 will gradually engage with the static contact 221 under the action of the self-closing force, and before the moving contact 222 is completely engaged with the static contact 221, the isolation knife gate 400 has been engaged with the isolation contact 100. As the moving contact 222 gradually engages with the stationary contact 221, the moving contact 222 drives the transmission member 310 to rotate, returning the transmission member 310 to its initial position for the next opening. That is, the open state of the vacuum interrupter mechanism 200 is not released until the isolation knife switch 400 engages with the isolation contact 100. With this arrangement, when the isolation knife switch 400 rotates to a position closer to the vacuum interrupter mechanism 200 during the closing operation, because the vacuum interrupter mechanism 200 is in the open state, no discharge will occur between the isolation knife switch 400 and the vacuum interrupter mechanism 200, thereby improving the safety and reliability of the closing operation.

[0057] The vacuum arc extinguishing mechanism 200 is kept open by locking the first lock buckle 3111 and the second lock buckle 321, and the first lock buckle 3111 and the second lock buckle 321 are unlocked by cooperating with the isolation knife switch 400 and the linkage 330. The control is convenient and smooth, which reduces the risk of closing failure of the vacuum arc extinguishing mechanism 200 and has a simple structure.

[0058] It is understandable that there are many solutions for achieving the connection between the isolation switch 400 and the isolation contact 100 first, and the connection between the moving contact 222 and the static contact 221 of the vacuum arc extinguishing mechanism 200 later.

[0059] For example, in one possible embodiment, during the rotation of the isolation knife gate 400 along the second rotation direction, the isolation knife gate 400 first contacts the linkage 330. As the isolation knife gate 400 rotates further, the isolation knife gate 400 drives the linkage 330 to drive the second lock buckle 321 to rotate toward the unlocked position. After the isolation knife gate 400 engages with the isolation contact 100, the second lock buckle 321 will rotate to the unlocked position and separate from the first lock buckle 3111 to unlock.

[0060] In another possible embodiment, during the rotation of the isolation knife gate 400 along the second rotation direction, the isolation knife gate 400 will first engage with the isolation contact 100, and then as the isolation knife gate 400 further rotates, the isolation knife gate 400 will contact the linkage 330 and drive the linkage 330 to move, so that the linkage 330 drives the second lock buckle 321 to separate and unlock from the first lock buckle 3111.

[0061] It is worth mentioning that, continue to see Figure 1 、 Figure 5-Figure 7 , during the rotation of the isolation knife gate 400 along the first rotation direction (counterclockwise in the figure), the isolation knife gate 400 will gradually move away from the linkage part 330. During this process, the linkage part 330 will drive the second lock buckle 321 on the locking part 320 to rotate from the unlocked position to the locked position under the action of gravity. At the same time, the isolation knife gate 400 will drive the transmission part 310 to rotate, so that the first lock buckle 3111 on the transmission part 310 gradually approaches the second lock buckle 321, that is, in this process, the first lock buckle 3111 and the second lock buckle 321 gradually approach each other and adjust their angles at the same time, until the isolation knife gate 400 is about to be separated from the transmission part 310, the first lock buckle 3111 and the second lock buckle 321 are adjusted into place and locked with each other, and the moving contact 222 and the static contact 221 of the vacuum arc extinguishing mechanism 200 are completely separated.

[0062] It is understandable that when the first lock buckle 3111 is locked with the second lock buckle 321 and the isolation switch 400 continues to rotate away from the isolation contact 100, the linkage member 330 can also keep the second lock buckle 321 reliably locked with the first lock buckle 3111 through its own gravity.

[0063] It is understandable that, since the transmission member 310 plays the role of current transfer, the transmission member 310 needs to be made of conductive material.

[0064] Optionally, the transmission member 310 may be rotatably connected to the insulating housing 210 via a fixing pin, and the transmission member 310 may also be hinged to the moving contact 222 via the fixing pin.

[0065] Further, see Figure 4 In this embodiment, the linkage member 330 includes a linkage portion 331 and two connecting arms 332. Specifically, the linkage portion 331 is used to cooperate with the isolation knife switch 400, and the two connecting arms 332 are respectively provided on opposite sides of the linkage portion 331. One end of the connecting arm 332 away from the linkage portion 331 is connected to the locking member 320, and the two connecting arms 332 are respectively provided on opposite sides of the locking member 320.

[0066] It can be understood that during the rotation of the isolating switch 400 in the second rotation direction, the isolating switch 400 will contact the linkage part 331 and push the linkage part 331 to move, so that the linkage part 331 drives the locking part 320 to rotate through the connecting arm 332.

[0067] The linkage part 330 has a simple structure and high structural stability.

[0068] Optionally, in a possible embodiment, the linkage part 330 and the locking part 320 form an integral structure. For example, the linkage part 330 and the locking part 320 can be integrally formed by injection molding. This setting is convenient for processing and assembly, and the connection strength between the linkage part 330 and the locking part 320 is also high.

[0069] Optionally, continue to refer to Figure 1 and Figure 4 , in a possible embodiment, the connecting arm 332 is in a "V" shape, and the opening of the connecting arm 332 is close to the isolating switch 400. With this setting, it can not only avoid the isolating switch 400 through the opening of the connecting arm 332, but also make the center of gravity of the linkage part 330 downward to ensure the reliability of the linkage part 330 driving the second lock 321 to rotate from the unlocking position to the locking position under the action of gravity, and can also make the structure of the linkage part 330 as simple as possible for easy processing.

[0070] Of course, in other embodiments, the shape of the connecting arm 332 can also be set to others, such as a "匚" shape, etc. The opening of the "匚" - shaped connecting arm 332 is close to the isolating switch 400. It can be set according to actual needs, and this application does not make specific limitations.

[0071] Optionally, continue to refer to Figure 4 , in this embodiment, the end of the connecting arm 332 far from the linkage part 331 is bent and connected to the locking part 320.

[0072] Furthermore, the transmission mechanism 300 further includes a first elastic member (not shown in the figure). One end of the first elastic member is connected to the insulating housing 210, and the other end is connected to the locking part 320. The first elastic member is configured to always have a tendency to drive the second lock 321 to rotate from the unlocking position to the locking position. By setting the first elastic member, during the rotation of the isolating switch 400 in the first rotation direction, the second lock 321 rotates towards the locking position under the combined action of the elastic force of the first elastic member and the gravity of the linkage part 330 itself. That is, the first elastic member plays a role in assisting the linkage part 330 to drive the second lock 321 to rotate, improving the reliability of the second lock 321 resetting to the locking position and the reliability of the second lock 321 locking with the first lock 3111.

[0073] Optionally, the first elastic member may be a torsion spring, the spiral portion of which may be sleeved on a rotating shaft rotatably connecting the locking member 320 and the insulating housing 210 , the first torsion arm of the torsion spring abutting against the insulating housing 210 , and the second torsion arm abutting against the locking member 320 .

[0074] Optionally, continue with Figure 1 The insulating housing 210 is provided with a connecting arm 211, the end of which is rotatably connected to the locking member 320. The connecting arm 211 realizes the rotatable connection between the locking member 320 and the insulating housing 210, which has a simple structure. The connecting arm 211 can be extended to allow the locking member 320 to be close to the isolation knife switch 400, thereby facilitating the connection between the linkage member 330 and the locking member 320.

[0075] Continue to see Figure 4 In the solution where the first elastic member is a torsion spring, a first slot can be provided on the connecting arm 211, into which the first torsion arm of the torsion spring is engaged, and a second slot 323 can be provided on the locking member 320, into which the second torsion arm of the torsion spring is engaged. This arrangement facilitates the assembly of the torsion spring.

[0076] Further, see Figure 3 The other end of the transmission member 310 is provided with a locking block 311. A first locking catch 3111 is a first locking hook disposed on the locking block 311. A first arcuate surface 3112 is provided on the side wall of the first locking hook near the locking member 320. A second locking catch 321 is a second locking hook disposed on the locking member 320. A second arcuate surface 322 is provided on the side wall of the second locking hook near the locking block 311.

[0077] Specifically, when one end of the transmission member 310, which includes the locking block 311, rotates toward the locking member 320 under the push of the isolation knife gate 400 (the transmission member 310 rotates counterclockwise), the first curved surface 3112 first contacts the second curved surface 322. As the transmission member 310 rotates further, the locking block 311 pushes the locking member 320 to rotate. This prevents the locking member 320 from interfering with the movement of the locking block 311, while also improving the smoothness of the movement of the locking block 311 through the cooperation between the first curved surface 3112 and the second curved surface 322. After the first locking hook moves into position, the linkage member 330, under the action of gravity, causes the second locking hook to engage with the first locking hook.

[0078] During this process, the friction between the first arc surface 3112 and the second arc surface 322 is rolling friction, that is, by setting the first arc surface 3112 and the second arc surface 322, the smoothness of the rotation of the first lock buckle 3111 and the second lock buckle 321 can be improved, and the risk of wear between the locking block 311 and the locking member 320 can be reduced.

[0079] Further, see Figure 1 and Figure 3 The vacuum parallel switch device further includes a second elastic member 500, one end of which is connected to the transmission member 310 and the other end is connected to the insulating housing 210. The second elastic member 500 is configured to always have a tendency to push the first lock catch 3111 to rotate away from the second lock catch 321. Specifically, when the first lock catch 3111 on the transmission member 310 rotates toward the second lock catch 321, the transmission member 310 compresses the second elastic member 500. At this time, the second elastic member 500 accumulates elastic potential energy. When the second lock catch 321 disengages from the first lock catch 3111, the second elastic member 500 releases the elastic potential energy, pushing the transmission member 310 to rotate in the opposite direction. The rotation of the transmission member 310 pushes the movable contact 222 to engage with the static contact 221. That is, the movable contact 222 is simultaneously subjected to the self-closing force and the pushing force of the transmission member 310, thereby improving the reliability of the engagement between the movable contact 222 and the static contact 221.

[0080] It is understandable that the second elastic member 500 may be, but is not limited to, a compression spring.

[0081] Further, see Figure 1 and Figure 3 The other end of the transmission member 310 is provided with a first conductive arm 312 and a second conductive arm 313. Elastic conductive members (not shown) are provided on opposite sides of the first conductive arm 312. The isolation switch 400 includes two spaced apart conductive plates (not shown), which are provided in a one-to-one correspondence with the elastic conductive members.

[0082] Specifically, during the rotation of the isolation knife switch 400 along the first rotation direction, the conductive plate first slides and electrically connects to the corresponding elastic conductive member until the conductive plate is separated from the isolation contact 100. During this process, the isolation knife switch 400 gradually transfers the current to the vacuum arc extinguishing mechanism 200 through the transmission member 310 by being electrically connected to the elastic conductive member. When the isolation knife switch 400 is separated from the isolation contact 100, all the current is transferred to the vacuum arc extinguishing mechanism 200. That is, the process of the conductive plate and the elastic conductive member being electrically connected in a sliding manner is the process of current transfer, and at the same time, it can ensure that the isolation knife switch 400 moves to a safe distance from the isolation contact 100, thereby preventing the isolation knife switch 400 from being connected to the isolation contact 100 due to discharge. It is worth noting that during this process, the transmission member 310 does not rotate, and the moving contact 222 remains engaged with the static contact 221.

[0083] When the current is completely transferred and the distance between the isolation switch 400 and the isolation contact 100 is a safe distance, the two conductive plates simultaneously contact the second conductive arm 313 and push the transmission member 310 to rotate through the second conductive arm 313, so that the transmission member 310 drives the contact 222 to separate from the static contact 221.

[0084] It is understood that during the interaction between the isolation switch 400 and the first conductive arm 312, the first conductive arm 312 is sandwiched between the two conductive plates. Therefore, by designing the distance between the two conductive plates, the conductive plates can exert a certain pressure on the elastic conductive member. The elastic force of the elastic conductive member ensures the reliability of the electrical connection between the conductive plates. Furthermore, the elastic conductive member can also hinder the movement of the conductive plates, preventing them from moving too quickly and thus ensuring the stability of current transfer.

[0085] It is understandable that the length of the elastic conductive member can be designed according to the safe distance between the isolation switch 400 and the isolation contact 100 .

[0086] Optionally, continue with Figure 3 , grooves 3121 can be provided on opposite sides of the first conductive arm 312 , and the elastic conductive member can be installed in the grooves 3121 .

[0087] Optionally, in a possible embodiment, the elastic conductive member is a watchband contact finger, and contacts (not shown in the figure) are provided on the opposite surfaces of the two conductive plates, and the contacts can be slidably electrically connected to the watchband contact finger.

[0088] 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 600 is set outside the isolation spindle 20 and part of the isolation switch 400. The insulation shield 600 can play a role in strengthening insulation and reducing the discharge risk of the isolation switch 400.

[0089] In this embodiment, when the isolation knife switch 400 rotates along the second rotation direction, the insulating protective cover 600 contacts the linkage member 330 and pushes the linkage member 330 to drive the second lock buckle 321 to rotate, so that the second lock buckle 321 is separated from the first lock buckle 3111.

[0090] Optionally, continue with Figure 2 and Figure 8 The transmission mechanism 300 further includes a conductive rod 340. Specifically, one end of the conductive rod 340 is connected to the movable contact, and the other end of the conductive rod 340 is hingedly connected to the transmission member 310. That is, the transmission member 310 is hingedly connected to the movable contact 222 via the conductive rod 340. This simple structure facilitates assembly.

[0091] In order to facilitate understanding, the working process of the vacuum parallel switch device is briefly introduced:

[0092] Opening process:

[0093] like Figure 1As 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 (as shown in FIG. Figure 2 As shown), the isolation knife gate 400 abuts against the linkage member 330 to limit the second lock buckle 321, so that the second lock buckle 321 remains in the unlocked position;

[0094] like Figure 5 As shown, the isolating switch 400, driven by the isolating spindle 20, rotates counterclockwise until the conductive plate of the isolating switch 400 just contacts the elastic conductive member on the first conductive arm 312. At this point, the isolating switch 400 still partially maintains contact with the isolating contact 100, and a portion of the main circuit current is transferred to the vacuum interrupter 200 to form a parallel circuit. Furthermore, during this process, the isolating switch 400 gradually moves away from the linkage member 330. Therefore, the linkage member 330 can drive the second lock catch 321 to rotate toward the locked position under the action of gravity.

[0095] like Figure 6 As shown, as the isolation switch 400 rotates further counterclockwise, the conductive plate of the isolation switch 400 slides and electrically connects with the elastic conductive member on the first conductive arm 312 until the isolation switch 400 is completely separated from the isolation contact 100. At this point, the main circuit current is completely transferred to the vacuum interrupter mechanism 200 branch, completing the current transfer. Furthermore, during this process, the second lock catch 321 continues to rotate toward the locked position driven by the linkage member 330.

[0096] As the isolating knife switch 400 rotates further in the counterclockwise direction, the conductive plate of the isolating knife switch 400 contacts the second conductive support arm 313, and drives the transmission member 310 to rotate in the counterclockwise direction through the second conductive support arm 313. The counterclockwise rotation of the transmission member 310 compresses the second elastic member 500 and drives the first lock buckle 3111 close to the second lock buckle 321. Under the mutual cooperation of the first arc surface 3112 and the second arc surface 322, the first lock buckle 3111 finally moves into place. After the first lock buckle 3111 moves into place, the linkage member 330 rotates the second lock buckle 321 to lock with the first lock buckle 3111 under the action of gravity. At this time, the conductive plate of the isolating knife switch 400 moves to be about to separate from the second conductive support arm 313, the moving contact 222 and the static contact 221 are separated, and the vacuum arc extinguishing mechanism 200 is opened (such as Figure 7 As shown), the arc generated by the opening is extinguished under the action of vacuum, and the opening of the vacuum parallel switch device is completed;

[0097] like Figure 7 As shown, as the isolation switch 400 rotates further in the counterclockwise direction, the isolation switch 400 separates from the second conductive arm 313, and the first lock buckle 3111 remains locked with the second lock buckle 321, so that the vacuum arc extinguishing mechanism 200 remains in the open state.

[0098] Closing process:

[0099] Under the action of the isolation main shaft 20, the isolation knife switch 400 rotates in the clockwise direction and gradually approaches the isolation contact 100. During this process, the isolation knife switch 400 will never contact the first conductive arm 312 and the second conductive arm 313, but the isolation knife switch 400 will contact the linkage 330 and drive the second lock 321 to rotate to the unlocked position through the linkage 330, but the second lock 321 is not completely rotated to the unlocked position.

[0100] like Figure 9 As shown, as the isolation knife switch 400 further rotates in the clockwise direction, the isolation knife switch 400 begins to contact the isolation contact 100 .

[0101] like Figure 10 As shown, during the process when the isolating knife switch 400 starts to contact the isolating contact 100 until the isolating knife switch 400 rotates into place, the isolating knife switch 400 drives the second lock buckle 321 to rotate to the unlocked position by pushing the linkage part 330, so that the second lock buckle 321 is separated from the first lock buckle 3111. After the first lock buckle 3111 is separated from the second lock buckle 321, the moving contact 222 will gradually engage with the static contact 221 under the drive of the self-closing force and the transmission part 310. At the same time, the transmission part 31 will also return to the initial position under the action of the elastic force of the second elastic part 500 and the self-closing force of the moving contact 222, so as to facilitate the next opening. The closing of the vacuum parallel switch device is completed.

[0102] 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.

[0103] Since the switchgear adopts the above-mentioned vacuum parallel switch device, the safety and reliability of opening and closing operations are better.

[0104] Optionally, continue with Figure 1 In this embodiment, both ends of the main busbar 10 are installed on the side walls of the cabinet through bushings 30 .

[0105] 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; an isolating switch rotatable in a first rotational direction to disengage the isolating contact and rotatable in a second rotational direction to engage with the isolating contact; 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; A transmission mechanism comprising a transmission member, a locking member, and a linkage member, wherein the transmission member is rotatably connected to the insulating housing, one end of the transmission member is hinged to the moving contact, and the other end is provided with a first lock catch, the locking member is rotatably connected to the insulating housing, the locking member is provided with a second lock catch, and one end of the linkage member is fixedly connected to the locking member, and the linkage member can drive the second lock catch to rotate to a locked position locked with the first lock catch under the action of gravity, and the linkage member can also drive the second lock catch to rotate to an unlocked position separated from the first lock catch when driven; The isolating knife switch is capable of contacting and driving the transmission member to rotate during the process of rotating along the first rotation direction, so that the transmission member drives the moving contact and the static contact to gradually separate while also driving the first lock catch to gradually approach the second lock catch, and after the moving contact and the static contact are completely separated, the first lock catch is locked to the second lock catch located in the locking position, so that the transmission member drives the moving contact and the static contact to remain separated; During the rotation of the isolating knife switch along the second rotation direction, it can contact and drive the linkage to move, so that the linkage drives the second lock to separate and unlock the first lock, and then the moving contact and the static contact are gradually engaged, and before the moving contact and the static contact are completely engaged, the isolating knife switch has been engaged with the isolation contact.

2. The vacuum parallel switch device according to claim 1, characterized in that: A locking block is provided on the other end of the transmission member, the first locking buckle is a first locking hook provided on the locking block, and a first arc surface is provided on a side wall of the first locking hook close to the locking member; The second lock buckle is a second lock hook provided on the locking member, and a second arc surface is provided on the side wall of the second lock hook close to the locking block; During the process of the locking block rotating toward the locking member, the first arc surface cooperates with the second arc surface to drive the locking member to rotate until the first lock hook moves into place, and the linkage member drives the second lock hook to be clamped into the first lock hook under the action of gravity.

3. The vacuum parallel switch device according to claim 1, characterized in that: The transmission mechanism also includes a first elastic member, one end of which is connected to the insulating shell, and the other end is connected to the locking member. The first elastic member is configured to always have a tendency to drive the second lock to rotate from the unlocking position to the locking position.

4. The vacuum parallel switch device according to claim 1, characterized in that: The insulating shell is provided with a connecting arm, and the end of the connecting arm is rotatably connected to the locking member.

5. The vacuum parallel switch device according to claim 1, characterized in that: The linkage part includes a linkage portion and two connecting arms. The linkage part is used to cooperate with the isolation knife switch. The two connecting arms are arranged on opposite sides of the linkage part. One end of the connecting arm away from the linkage part is connected to the locking part, and the two connecting arms are arranged on opposite sides of the locking part.

6. The vacuum parallel switch device according to any one of claims 1 to 5, characterized in that: The vacuum parallel switch device also includes a second elastic member, one end of which is connected to the transmission member, and the other end is connected to the insulating shell. The second elastic member is configured to always have a tendency to push the first lock to rotate in a direction away from the second lock.

7. The vacuum parallel switch device according to any one of claims 1 to 5, characterized in that: The other end of the transmission member is provided with a first conductive arm and a second conductive arm, and elastic conductive members are provided on opposite sides of the first conductive arm; The isolation knife switch includes two conductive plates arranged at intervals, and the conductive plates are arranged in a one-to-one correspondence with the elastic conductive parts. During the rotation of the isolation knife switch along the first rotation direction, the conductive plates first slide and electrically connect to the corresponding elastic conductive parts until they are separated from the isolation contacts. After that, the two conductive plates contact the second conductive support arms at the same time, and push the transmission member to rotate through the second conductive support arms.

8. The vacuum parallel switch device according to claim 7, characterized in that: The elastic conductive member is a watchband contact finger, and contacts are provided on the opposite surfaces of the two conductive plates, and the contacts can be slidably connected to the watchband contact finger.

9. The vacuum parallel switch device according to any one of claims 1 to 5, characterized in that: The isolation knife switch is connected to the isolation main shaft, and the isolation main shaft is used to drive the isolation knife switch to rotate. The insulating protective cover is arranged outside the isolation main shaft and part of the isolation knife switch.

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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