Vacuum parallel switch device and switch equipment

Abstract

The invention relates to the technical field of switch devices, and 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 first elastic piece. The locking piece comprises a locking part and an unlocking part. The isolation disconnecting link can rotate along a first rotation direction to be separated from the isolation contact, and in the process, the transmission part is driven to rotate, so that the transmission part drives the first lock catch to be gradually close to the second lock catch while driving the moving contact to be gradually separated from the static contact, and after the moving contact and the static contact are separated, the first lock catch is locked to the second lock catch; and the isolation disconnecting link can also rotate along the second rotation direction to be jointed with the isolation contact, and continuously rotate to push the unlocking part to move after being jointed with the isolation contact, so that the unlocking part drives the second lock catch to be separated from the first lock catch. 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] Vacuum parallel switch device, 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 first elastic 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 comprises a locking portion and an unlocking portion, the locking portion is slidably assembled to the insulating housing, and the locking portion is provided with a second lock catch, the first elastic member is configured to always have a tendency to pull the locking portion closer to the first lock catch, one end of the unlocking portion is connected to the locking portion, and the unlocking portion can pull the locking portion away from the first lock catch when driven;

[0012] The isolating knife switch is able to contact the transmission member during the process of rotating along the first rotation direction, and drive 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, so that the transmission member drives the moving contact and the static contact to remain separated;

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

[0014] Optionally, a transmission head is provided at the end portion of the other end of the transmission member, and a first arc surface is provided on the transmission head, the first arc surface is close to the locking portion, a first slot is provided on one side of the first arc surface, and the first arc surface and the first slot form the first hook-shaped lock buckle;

[0015] The locking portion is provided with a second arc surface, the second arc surface is close to the transmission head, a second slot is provided on one side of the second arc surface, and the second arc surface and the second slot form a hook-shaped second lock buckle;

[0016] During the process of the transmission head rotating toward the locking part, the first arc surface can cooperate with the second arc surface to push the locking part to move in the direction away from the first lock buckle, until the first lock buckle moves into place, and the first elastic member pulls the second lock buckle to lock with the first lock buckle.

[0017] Optionally, the insulating housing is provided with a mounting arm extending in the direction of the isolating contact, a slide rail is provided on the lower surface of the mounting arm, baffles are provided on opposite sides of the mounting arm, the slide rail is located between the two baffles, a slider is provided on the top of the locking portion, the slider is provided with a slide groove that slidably cooperates with the slide rail, and opposite side surfaces of the slider are respectively slidably attached to the two baffles;

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

[0019] Optionally, connecting rods are connected to the opposite sides of the locking part, and the two connecting rods are bent at one end away from the locking part and connected by an unlocking rod. The unlocking rod is the unlocking part that cooperates with the isolation knife gate. During the rotation of the isolation knife gate along the second rotation direction, it will enter between the two connecting rods and push the unlocking rod to move.

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

[0021] 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.

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

[0023] The isolation knife switch includes two conductive plates arranged at intervals, and the conductive plates, the elastic conductive parts and the second conductive support arms are arranged correspondingly. 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 conductive plates will contact the corresponding second conductive support arms and push the transmission member to rotate through the second conductive support arms.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] The beneficial effects of the present invention are:

[0028] 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.

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

[0030] The provision of the first elastic member can not only ensure the reliability of the locking of the first lock buckle and the second lock buckle, but also achieve the reset of the second lock buckle after being unlocked, thereby ensuring the reliability of the cooperation between the second lock buckle and the first lock buckle.

[0031] 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

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

[0033] Figure 2 A schematic diagram of the cooperation between the locking member and the insulating housing provided in an embodiment of the present invention;

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

[0035] Figure 4 A schematic structural diagram of a locking member provided in an embodiment of the present invention;

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

[0037] Figure 6 A schematic diagram of the cooperation between the isolation switch and the transmission member provided in an embodiment of the present invention;

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

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

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

[0041] In the picture:

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

[0043] 100. Isolating contacts;

[0044] 200, vacuum arc extinguishing mechanism; 210, insulating housing; 211, mounting arm; 2111, slide rail; 2112, baffle; 220, static contact; 230, moving contact;

[0045] 300, transmission mechanism; 301, transmission head; 3011, first arc surface; 3012, first engaging groove; 310, transmission member; 311, first locking catch; 312, first conductive arm; 313, second conductive arm; 314, elastic conductive member; 320, locking member; 321, locking portion; 3211, second locking catch; 32111, second arc surface; 32112, second engaging groove; 3212, slider; 32121, slide groove; 322, unlocking portion; 323, connecting rod; 3231, protrusion; 324, unlocking lever; 330, first elastic member;

[0046] 400, isolating switch; 410, conductive plate; 411, contact;

[0047] 500, insulating partition; 510, guide hole;

[0048] 600, second elastic member;

[0049] 700. 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 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.

[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 Figures 1-15 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 interrupter mechanism 200 includes an insulating housing 210 and a vacuum interrupter chamber mounted within the insulating housing 210. The vacuum interrupter 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 interrupter mechanism 200 via the isolating knife switch 400. The vacuum interrupter mechanism 200 extinguishes the arc generated during opening, thereby ensuring operational safety even when air is used as the insulating gas. In one possible embodiment, the static contact 220 can be electrically connected to the isolating contact 100 via the main busbar 10. In other embodiments, the electrical connection between the static contact 220 and the isolating contact 100 can be other, as required. It is understood that the insulating housing 210 serves as an insulating mounting bracket to facilitate assembly of the vacuum interrupter mechanism 200.

[0058] The transmission mechanism 300 includes a transmission member 310, a locking member 320, and a first elastic member 330. The transmission member 310 is rotatably connected to the insulating housing 210. One end of the transmission member 310 is hinged to the moving contact 230, and the other end is provided with a first locking catch 311. By moving the other end of the transmission member 310, which is located at the center of rotation, the transmission member 310 rotates. This causes the hinged end of the transmission member 310 to move the moving contact 230 away from the stationary contact 220, thereby opening the vacuum interrupter 200. The locking member 320 includes a locking portion 321 and an unlocking portion 322 connected to the locking portion 321. The locking portion 321 is provided with a second locking catch 3211 and is slidably mounted on the insulating housing 210. The first elastic member 330 is configured to constantly pull the locking portion 321 toward the first locking catch 311. When actuated, the unlocking portion 322 can pull the locking portion 321 away from the first locking catch 311.

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

[0060] 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 311, 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 230 and the static contact 220 in the vacuum arc extinguishing mechanism 200 to gradually separate. An arc is generated when the moving contact 230 is separated from the static contact 220. Since the arc is generated in the vacuum arc extinguishing mechanism 200, 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 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. As the transmission member 310 pulls the moving contact 230 and the static contact 220 apart, the first lock catch 311 on the transmission member 310 gradually approaches the second lock catch 3211 until the moving contact 230 and the static contact 220 are completely separated (the moving contact 230 moves to a predetermined distance from the static contact 220). The first lock catch 311 and the second lock catch 3211 are locked. After that, the isolating knife switch 400 continues to rotate and separates from the transmission member 310. That is, after the first lock catch 311 and the second lock catch 3211 are locked, the transmission member 310 remains stationary, thereby causing the transmission member 310 to pull the moving contact 230 and the static contact 220 apart, thereby maintaining the opening of the vacuum interrupter 200 and placing both the vacuum interrupter 200 and the transmission member 310 in a high-voltage suspended state. Furthermore, under the action of the first elastic member 330, the reliability of the locking of the first lock catch 311 and the second lock catch 3211 is relatively good.

[0061] When the isolation knife gate 400 rotates along the second rotation direction to approach and engage with the isolation contact 100, due to the locking of the first lock buckle 311 and the second lock buckle 3211, the isolation knife gate 400 will never contact the transmission member 310, and the isolation knife gate 400 will first engage with the isolation contact 100. Then, as the isolation knife gate 400 continues to rotate, the isolation knife gate 400 will contact the unlocking portion 322 and drive the unlocking portion 322 to move. Since the unlocking portion 322 is connected to the locking portion 321, the unlocking portion 322 can bring The dynamic locking portion 321 overcomes the elastic force of the first elastic member 330 and moves in a direction away from the first locking catch 311, causing the second locking catch 3211 on the locking portion 321 to separate from the first locking catch 311. After the second locking catch 3211 separates from the first locking catch 311, the moving contact 230 gradually approaches the static contact 220 under the action of the self-closing force and eventually engages with the static contact 220. During the process of engagement between the moving contact 230 and the static contact 220, the transmission member 310 is driven to rotate, causing the transmission member 310 to return to its initial position to facilitate the next opening. In other words, 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, no discharge will occur between the isolation knife switch 400 and the vacuum interrupter mechanism 200 because the vacuum interrupter mechanism 200 is in the open state, thereby improving the safety and reliability of the closing operation.

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

[0063] It can be understood that when the unlocking portion 322 is not subjected to the thrust of the isolation knife gate 400, the locking portion 321 will be pulled toward the first lock buckle 311 under the action of the first elastic member 330, so that the second lock buckle 3211 moves to the ready position for locking with the first lock buckle 311, and when the first lock buckle 311 and the second lock buckle 3211 are locked, the position of the second lock buckle 3211 remains unchanged, thereby ensuring the reliability of the locking of the first lock buckle 311 and the second lock buckle 3211.

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

[0065] 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.

[0066] 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 230 via a fixing pin.

[0067] Further, see Figure 1 and Figure 2 Connecting rods 323 are connected to opposite sides of the locking portion 321. The two connecting rods 323 are bent at one end, away from the locking portion 321, and connected by an unlocking rod 324. The unlocking rod 324 serves as the unlocking portion 322 that cooperates with the isolation knife gate 400. Specifically, when the isolation knife gate 400 rotates in the second rotational direction, it enters between the two connecting rods 323 and pushes the unlocking rod 324 to move. The connecting rods 323 and the unlocking rod 324 form a frame structure, which has high structural stability and improves the reliability of the unlocking portion 322.

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

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

[0070] Optionally, continue with Figure 2 and Figure 3 The vacuum parallel switch device also includes two insulating partitions 500, which are connected to opposite sides of the insulating housing 210 and form a protective space. The vacuum arc extinguishing mechanism 200, the transmission mechanism 300, and the isolating contact 100 are all located within the protective space. The provision of two insulating partitions 500 for electrical insulation reduces the risk of discharge during operation of the vacuum parallel switch device, thereby improving the safety of the vacuum parallel switch device. Furthermore, at least one insulating partition 500 is provided with a guide hole 510, and the connecting rod 323 adjacent to the insulating partition 500 is provided with a protrusion 3231 that slidably engages with the guide hole 510. This arrangement guides the movement of the connecting rod 323, facilitating smooth sliding of the locking portion 321 on the insulating housing 210.

[0071] In this embodiment, guide holes 510 are provided on both insulating spacers 500, and protrusions 3231 are provided on the connecting rods 323 adjacent to each insulating spacer 500, which slideably engage with the guide holes 510. This arrangement improves the uniformity of force applied to the locking portion 321, further enhancing the smoothness of the sliding of the locking portion 321.

[0072] Optionally, in this embodiment, the locking portion 321 slides in the horizontal direction, and the connecting rod 323 is in an “L” shape, that is, one end of the connecting rod 323 away from the locking portion 321 is bent in the horizontal direction.

[0073] Further, see Figure 1 、 Figure 4 and Figure 5The insulating housing 210 is provided with a mounting arm 211 extending toward the isolating contact 100. A slide rail 2111 is provided on the lower surface of the mounting arm 211. Baffles 2112 are provided on opposite sides of the mounting arm 211. The slide rail 2111 is positioned between the two baffles 2112. A slider 3212 is provided at the top of the locking portion 321. The slider 3212 is provided with a slide groove 32121 that slidably engages with the slide rail 2111. Opposite sides of the slider 3212 are slidably attached to the two baffles 2112. Thus, the locking portion 321 is slidably assembled with the insulating housing 210 through the cooperation of the slider 3212 and the slide rail 2111. This provides a simple structure and smooth sliding. Furthermore, the two baffles 2112 limit and guide the sliding of the slider 3212, further improving the smoothness and reliability of the slider 3212 sliding on the slide rail 2111.

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

[0075] Optionally, continue with Figure 1 One end of the first elastic member 330 is connected to the locking portion 321, and the other end is connected to the insulating housing 210. In this embodiment, the axis of the first elastic member 330 is parallel to the slide rail 2111. In this arrangement, the locking member 320 is only subjected to the pulling force along its sliding direction. In other words, the elastic force of the first elastic member 330 can be fully used to pull the locking member 320.

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

[0077] Specifically, when the first lock buckle 311 on the transmission member 310 rotates toward the direction close to the second lock buckle 3211, the transmission member 310 will compress the second elastic member 600. At this time, the second elastic member 600 accumulates elastic potential energy. When the second lock buckle 3211 disengages from the first lock buckle 311, the second elastic member 600 will release the elastic potential energy to push the transmission member 310 to rotate in the opposite direction. The rotation of the transmission member 310 will push the moving contact 230 to engage with the static contact 220, that is, the moving contact 230 is simultaneously subjected to the self-closing force and the pushing force of the transmission member 310, which improves the reliability of the engagement between the moving contact 230 and the static contact 220 and reduces the risk of failure of the vacuum arc extinguishing mechanism 200 to close.

[0078] It is understandable that the second elastic member 600 may be, but is not limited to, a compression spring.

[0079] Further, see Figure 6A first conductive arm 312 and two second conductive arms 313 are provided at the other end of the transmission member 310's rotation center. Elastic conductive members 314 are provided on opposite sides of the first conductive arm 312. The two second conductive arms 313 are provided on opposite sides of the transmission member 310 and adjacent to the first conductive arm 312. The isolation switch 400 includes two spaced apart conductive plates 410. The conductive plates 410, the elastic conductive members 314, and the second conductive arms 313 are provided in correspondence.

[0080] Specifically, during the rotation of the isolation switch 400 in the first rotational direction, the conductive plate 410 first slides and electrically connects to the corresponding elastic conductive member 314 until the conductive plate 410 separates from the isolation contact 100. During this process, the isolation switch 400, through the electrical connection with the elastic conductive member 314, gradually transfers the current to the vacuum interrupter mechanism 200 via the transmission member 310. When the isolation switch 400 separates from the isolation contact 100, the current is completely transferred to the vacuum interrupter mechanism 200. That is, the process of the conductive plate 410 sliding and electrically connecting to the elastic conductive member 314 is the process of current transfer, and at the same time, it can ensure that the isolation switch 400 moves to a safe distance from the isolation contact 100, thereby preventing the isolation switch 400 from being electrically 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 230 remains engaged with the static contact 220.

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

[0082] 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 410. Therefore, by designing the distance between the two conductive plates 410, the conductive plates 410 can exert a certain pressure on the elastic conductive member 314. The elastic force of the elastic conductive member 314 ensures the reliability of the electrical connection between the conductive plates 410 and the elastic conductive member 314. Furthermore, the elastic conductive member 314 can also hinder the movement of the conductive plates 410, preventing them from moving too quickly and thus ensuring the stability of current transfer.

[0083] By providing two second conductive arms 313 to cooperate with the two conductive plates 410 respectively, the conductive plates 410 can push the transmission member 310 to rotate with higher reliability.

[0084] Optionally, continue with Figure 6The second conductive arm 313 is detachably connected to the transmission member 310, and the angle of the second conductive arm 313 relative to the first conductive arm 312 is adjustable. In this way, the angle of the second conductive arm 313 can be adaptively adjusted to reduce the requirements for production accuracy.

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

[0086] It is understandable that the length of the elastic conductive member 314 can be designed according to the safe distance between the isolation switch 400 and the isolation contact 100 .

[0087] Optionally, grooves may be provided on opposite sides of the first conductive arm 312 , and the elastic conductive member 314 may be installed in the grooves.

[0088] Optionally, in a possible embodiment, the elastic conductive member 314 is a watchband contact finger, and contacts 411 are provided on the opposite surfaces of the two conductive plates 410 , and the contacts 411 can be slidably electrically connected to the watchband contact finger.

[0089] Further, see Figure 7 The other end of the transmission member 310 is provided with a transmission head 301. The transmission head 301 has a first curved surface 3011, which is close to the locking portion 321. A first engaging groove 3012 is provided on one side of the first curved surface 3011. The first curved surface 3011 and the first engaging groove 3012 form a hook-shaped first locking catch 311. The locking portion 321 has a second curved surface 32111, which is close to the transmission head 301. A second engaging groove 32112 is provided on one side of the second curved surface 32111. The second curved surface 32111 and the second engaging groove 32112 form a hook-shaped second locking catch 3211.

[0090] Specifically, as the transmission head 301 rotates toward the locking portion 321 under the push of the isolation knife gate 400, the first arc surface 3011 will first contact the second arc surface 32111. As the transmission head 301 rotates further, the first arc surface 3011 slides and fits against the second arc surface 32111, and the transmission head 301 can apply a force away from itself to the locking portion 321, causing the locking portion 321 to move in a direction away from the first lock buckle 311. When the first lock buckle 311 moves into place, the first arc surface 3011 separates from the second arc surface 32111 to cancel the thrust applied to the locking portion 321. At this time, the second lock buckle 3211 will approach and lock to the first lock buckle 311 under the pulling force of the first elastic member 330.

[0091] The first lock catch 311 and the second lock catch 3211 have a simple structure and are easy to process. In addition, the arrangement of the first arc surface 3011 and the second arc surface 32111 can reduce the resistance of the mutual cooperation between the transmission head 301 and the locking portion 321, which is conducive to improving the smoothness of the locking between the first lock catch 311 and the second lock catch 3211.

[0092] Optionally, continue with Figure 8 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 700 is set outside the isolation spindle 20 and part of the isolation switch 400. The insulation shield 700 can play a role in strengthening insulation and reducing the risk of discharge of the isolation switch 400.

[0093] In this embodiment, when the isolation knife switch 400 rotates along the second rotation direction and begins to contact the isolation contact 100 until it rotates to the right position, the insulating protective cover 700 will contact the unlocking part 322 and push the unlocking part 322 to move, so that the unlocking part 322 drives the locking part 321 to slide, so that the second lock buckle 3211 is separated from the first lock buckle 311.

[0094] In order to facilitate understanding, the working process of the vacuum parallel switch device is briefly introduced:

[0095] Opening process:

[0096] like Figure 1 As shown, the isolation knife switch 400 is in a position engaged with the isolation contact 100, the main circuit is connected, the vacuum interrupter mechanism 200 is in a closed state, and the isolation contact 100 limits the unlocking portion 322, so that the second lock catch 3211 remains in a position separated from the first lock catch 311;

[0097] like Figure 8 As shown, the isolating switch 400, driven by the isolating spindle 20, rotates counterclockwise until the conductive plate 410 of the isolating switch 400 just contacts the elastic conductive member 314 on the first conductive arm 312. At this point, the isolating switch 400 still partially maintains contact with the isolating contact 100, and part 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 unlocking portion 322, causing the second lock catch 3211 to move leftward under the pull of the first elastic member 330.

[0098] like Figure 9As shown, as the isolating knife switch 400 further rotates in the counterclockwise direction, the conductive plate 410 of the isolating knife switch 400 slides and electrically connects with the elastic conductive member 314 on the first conductive arm 312 until the isolating knife switch 400 is completely separated from the isolating contact 100. At this time, the main circuit current is completely transferred to the vacuum arc extinguishing mechanism 200 branch, completing the current transfer. In addition, during this process, the second lock buckle 3211 continues to move to the left under the pull of the first elastic member 330 until the isolating knife switch 400 is separated from the unlocking portion 322. When the first elastic member 330 has no elastic deformation, the second lock buckle 3211 no longer moves to the left. It is worth noting that during the process of the main circuit current transferring to the vacuum arc extinguishing mechanism 200 branch, the transmission member 310 remains stationary, that is, the vacuum arc extinguishing mechanism 200 remains in a closed state;

[0099] like Figure 10 As shown, as the isolation knife switch 400 rotates further counterclockwise, the conductive plate 410 of the isolation knife switch 400 contacts the second conductive arm 313 and pushes the second conductive arm 313, causing the transmission member 310 to rotate counterclockwise. The counterclockwise rotation of the transmission member 310 compresses the second elastic member 600 and drives the first lock catch 311 closer to the second lock catch 3211 until the first arc surface 3011 contacts the second arc surface 32111. In addition, the transmission member 310 drives the moving contact 230 and the static contact 220 to gradually separate.

[0100] like Figure 11 As shown, as the isolation knife switch 400 further rotates counterclockwise, the first lock catch 311 squeezes the second lock catch 3211, forcing the second lock catch 3211 to move rightward until the conductive plate 410 of the isolation knife switch 400 is separated from the second conductive arm 313. The first lock catch 311 rotates into place, the first arc surface 3011 is separated from the second arc surface 32111, and the second lock catch 3211 is locked to the first lock catch 311 under the action of the first elastic member 330. At this time, the moving contact 230 and the static contact 220 are completely separated, the vacuum arc extinguishing mechanism 200 is opened, and the arc generated by the opening is extinguished under the action of the vacuum, and the vacuum parallel switch device is opened.

[0101] like Figure 12 As shown, as the isolation knife switch 400 further rotates in the counterclockwise direction, the first lock buckle 311 will remain locked with the second lock buckle 3211, so that the vacuum interrupter mechanism 200 remains in the open state;

[0102] Closing process:

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

[0104] like Figure 14 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 , and then the isolation knife switch 400 contacts the unlocking portion 322 ;

[0105] like Figure 15 As shown, as the isolating knife switch 400 rotates further in the clockwise direction, the isolating knife switch 400 will push the unlocking part 322 to drive the second lock buckle 3211 to move to the right, so that the second lock buckle 3211 is separated from the first lock buckle 311. After the first lock buckle 311 is separated from the second lock buckle 3211, the transmission member 310 will return to the initial position under the action of the elastic force of the second elastic member 600 and the self-closing force of the moving contact 230, so as to open the switch next time, and the moving contact 230 will engage with the static contact 220 until the isolating knife switch 400 rotates into place, and the vacuum parallel switch device is closed.

[0106] This embodiment further provides a switchgear, including a cabinet 40 and the above-mentioned vacuum parallel switch device, wherein the vacuum parallel switch device is disposed in the cabinet 40 .

[0107] Since the switchgear adopts the above-mentioned vacuum parallel switch device, the safety and reliability of opening and closing operations are better.

[0108] Optionally, continue with Figure 1 and Figure 7 In this embodiment, both ends of the main busbar 10 are installed on the side walls of the cabinet 40 through the bushing 30 .

[0109] 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 first elastic 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 comprises a locking portion and an unlocking portion, the locking portion is slidably assembled to the insulating housing, and the locking portion is provided with a second lock catch, the first elastic member is configured to always have a tendency to pull the locking portion closer to the first lock catch, one end of the unlocking portion is connected to the locking portion, and the unlocking portion can pull the locking portion away from the first lock catch when driven; The isolating knife switch is able to contact the transmission member during the process of rotating along the first rotation direction, and drive 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, 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 first engages with the isolating contact, and then continues to rotate to contact the unlocking part and drive the unlocking part to move, so that the unlocking part pulls the locking part away from the first lock buckle, thereby separating the second lock buckle from the first lock buckle.

2. The vacuum parallel switch device according to claim 1, characterized in that: The other end of the transmission member is provided with a transmission head, the transmission head is provided with a first arc surface, the first arc surface is close to the locking portion, a first slot is provided on one side of the first arc surface, and the first arc surface and the first slot form a hook-shaped first lock buckle; The locking portion is provided with a second arc surface, the second arc surface is close to the transmission head, a second slot is provided on one side of the second arc surface, and the second arc surface and the second slot form a hook-shaped second lock buckle; During the process of the transmission head rotating toward the locking part, the first arc surface can cooperate with the second arc surface to push the locking part to move in the direction away from the first lock buckle, until the first lock buckle moves into place, and the first elastic member pulls the second lock buckle to lock with the first lock buckle.

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

4. The vacuum parallel switch device according to claim 1, characterized in that: Connecting rods are connected to the opposite sides of the locking part. The two connecting rods are bent at one end away from the locking part and connected by an unlocking rod. The unlocking rod is the unlocking part that cooperates with the isolation knife gate. During the rotation of the isolation knife gate along the second rotation direction, it will enter between the two connecting rods and push the unlocking rod to move.

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

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 two second conductive arms, elastic conductive members are provided on opposite sides of the first conductive arm, and the two second conductive arms are respectively provided on opposite sides of the transmission member and close to the first conductive arm; The isolation knife switch includes two conductive plates arranged at intervals, and the conductive plates, the elastic conductive parts and the second conductive support arms are arranged correspondingly. 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 conductive plates will contact the corresponding second conductive support arms 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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