Vacuum parallel switch and switchgear

Abstract

The present invention relates to the technical field of switchgear, and specifically discloses a vacuum parallel switch and switch cabinet. The vacuum parallel switch includes an isolating contact, an isolating knife switch, a grounding contact, a vacuum arc extinguishing mechanism, and a transmission mechanism. The isolating contact is used to electrically connect to the main busbar; the isolating knife switch is provided with an auxiliary contact; the grounding contact is arranged on one side of the isolating knife switch, and can rotate along a first rotation direction to contact the grounding contact or rotate along a second rotation direction to contact the isolating contact; the vacuum arc extinguishing mechanism is arranged on the other side of the isolating knife switch, and the static contact of the vacuum arc extinguishing mechanism is used to electrically connect to the main busbar, and the moving contact of the vacuum arc extinguishing mechanism can contact the static contact under the action of the self-closing force; the transmission mechanism is connected to the moving contact, and during the rotation of the isolating knife switch along the first rotation direction, the auxiliary contact can engage with the transmission mechanism, and drive the moving contact to separate from the static contact through the transmission mechanism. The vacuum parallel switch is highly safe to use and has a compact structure.

Description

Technical Field

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

[0002] For load switchgear that uses environmentally friendly gases such as dry air instead of SF6 gas, a vacuum interrupter is typically installed in series or parallel with the isolating knife switch to meet the requirements for interrupting performance. In the series structure, both the isolating knife switch and the vacuum interrupter must withstand the dynamic thermal stability current and the operating current, and the mechanical transmission structure is relatively complex and costly. In the parallel structure, only the isolating knife switch withstands the dynamic thermal stability current and the operating current, while the vacuum interrupter only extinguishes the arc when interrupting the load current. In other words, the isolating knife switch is the main circuit, and the vacuum interrupter is the auxiliary arc extinguishing circuit. This simple structure and low cost have a very superior market prospect compared to the series solution.

[0003] Currently, the parallel structure generally adds a vacuum interrupter between the static and grounding contacts of a rotary blade disconnector. A transmission mechanism is installed at the end of the vacuum interrupter's pull rod, allowing the transmission mechanism to interrupt the circuit within the vacuum interrupter as the rotary blade disconnector moves between the static and grounding contacts. This solution places the vacuum interrupter close to the disconnector, making it less safe. It also wastes available space within the cabinet, making the overall cabinet larger.

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

[0005] According to one aspect of the present invention, a vacuum parallel switch is provided, in which the vacuum arc extinguishing mechanism is arranged on the other side of the movement direction of the isolating knife switch, which can not only increase the insulation distance between the vacuum arc extinguishing mechanism and the isolating knife switch to improve the safety of use, but also make full use of the remaining space in the cabinet, thereby improving the structural compactness of the vacuum parallel switch.

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

[0007] Vacuum parallel switch, including:

[0008] Isolating contacts, used for electrical connection with the main busbar;

[0009] An isolating knife switch, wherein the isolating knife switch is provided with an auxiliary contact;

[0010] A grounding contact is provided on one side of the isolation switch, and the isolation switch can be rotated in a first rotation direction to contact the grounding contact, or rotated in a second rotation direction to contact the isolation contact;

[0011] a vacuum arc extinguishing mechanism, arranged on the other side of the isolating knife switch, comprising a static contact and a moving contact, wherein the static contact is used to be electrically connected to the main busbar, and the moving contact can contact the static contact under the action of a self-closing force;

[0012] The transmission mechanism is connected to the moving contact. When the isolating knife switch rotates along the first rotation direction, the auxiliary contact can engage with the transmission mechanism and drive the moving contact to separate from the static contact through the transmission mechanism.

[0013] In the above technical solution, the engagement between the auxiliary contact and the transmission mechanism means that the auxiliary contact applies a force to the transmission mechanism, and this force can cause the transmission mechanism to drive the moving contact to separate from the static contact.

[0014] Optionally, the transmission mechanism includes:

[0015] A conductive pull rope, one end of which is connected to the moving contact;

[0016] A guide member is arranged opposite to the auxiliary contact, a slideway is provided in the guide member, and an opening is provided on a side wall of the guide member to connect the slideway with the outside;

[0017] A sliding member, one end of which is slidably arranged in the slideway, and the other end is connected to the other end of the conductive pull rope. The sliding member is provided with a pressure contact passing through the opening, and the auxiliary contact can drive the sliding member to move through the pressure contact, so that the sliding member pulls the moving contact and the static contact apart through the conductive pull rope.

[0018] Optionally, a first rack is provided on the two opposite inner walls of the opening, a second rack is provided on the two opposite side walls of the sliding member, and a first elastic member is provided between the sliding member and the guide member, and the first elastic member is used to make the second rack engage with the first rack to lock the sliding member.

[0019] Optionally, the end of the pressure contact that contacts the auxiliary contact is arc-shaped, and the end of the auxiliary contact is also arc-shaped.

[0020] Optionally, the transmission mechanism further includes a static pulley, which is arranged below the moving contact, and the conductive rope is wound around the static contact.

[0021] Optionally, the transmission mechanism includes:

[0022] a second elastic member, one end of which is connected to the moving contact and extends along the sliding direction of the moving contact;

[0023] A transmission rod, one end of the transmission rod is connected to the other end of the second elastic member, and the other end of the transmission rod is arranged opposite to the auxiliary contact. The auxiliary contact can contact the other end of the transmission rod and drive the transmission rod to rotate, so that one end of the transmission rod pulls the moving contact to separate from the static contact through the second elastic member, and when the auxiliary contact is separated from the transmission rod, the moving contact will maintain contact with the static contact under the action of the elastic force of the second elastic member and the self-closing force of the vacuum arc extinguishing mechanism.

[0024] Optionally, the transmission rod includes an insulating part and a conductive part that are stacked, the insulating part is close to the isolation contact, and the conductive part is electrically connected to the second elastic member. When the isolation switch and the isolation contact are in a separated state, the auxiliary contact contacts the insulating part or is separated from the transmission rod.

[0025] Optionally, the transmission rod includes a transmission rod body and a transmission segment provided at one end of the transmission rod body close to the auxiliary contact, and a thickness a of the transmission segment is smaller than a thickness b of the transmission rod body.

[0026] Optionally, the vacuum parallel switch further includes:

[0027] Insulation support seat;

[0028] A main shaft is rotatably arranged on the insulating support seat, and the main shaft is connected to one end of the isolation knife switch;

[0029] A driving member is connected to the main shaft, and is used to drive the main shaft to rotate, so that the main shaft drives the isolation knife switch to rotate along the first rotation direction or the second rotation direction.

[0030] According to another aspect of the present invention, the present invention further provides a switch cabinet, comprising a cabinet body and the vacuum parallel switch according to any one of the above technical solutions, wherein the vacuum parallel switch is arranged in the cabinet body.

[0031] The beneficial effects of the present invention are:

[0032] The present invention provides a vacuum parallel switch, comprising an isolating contact, an isolating knife switch, a grounding contact, a vacuum arc extinguishing mechanism, and a transmission mechanism. The vacuum arc extinguishing mechanism is opened by cooperating between an auxiliary contact on the isolating knife switch and the transmission mechanism, so that the vacuum arc extinguishing mechanism can be arranged on the side of the isolating knife switch away from the grounding contact. That is, the vacuum arc extinguishing mechanism is arranged away from the movement path of the isolating knife switch. This arrangement not only increases the insulation distance between the vacuum arc extinguishing mechanism and the isolating knife switch, thereby improving operational safety, but also fully utilizes the remaining space within the cabinet of the vacuum parallel switch, thereby improving the structural compactness of the vacuum parallel switch.

[0033] The present invention also provides a switch cabinet comprising a cabinet body and the above-mentioned vacuum parallel switch. Due to the use of the above-mentioned vacuum parallel switch, the switch cabinet has high safety in use and a relatively compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic structural diagram of a vacuum parallel switch provided in the first embodiment of the present invention;

[0035] Figure 2 for Figure 1 A partial enlarged view of

[0036] Figure 3 A schematic structural diagram of a transmission mechanism provided in Example 1 of the present invention;

[0037] Figure 4 A front view of the transmission mechanism provided in Example 1 of the present invention;

[0038] Figure 5 A top view of the transmission mechanism provided in Example 1 of the present invention;

[0039] Figure 6 A left side view of the transmission mechanism provided in Example 1 of the present invention;

[0040] Figure 7 A schematic structural diagram of a sliding member provided in Embodiment 1 of the present invention;

[0041] Figures 8-13 A diagram showing a process of the isolation switch provided in the first embodiment of the present invention moving from a position in contact with the isolation contact to a position in contact with the grounding contact in a first direction;

[0042] Figure 14-15 A diagram showing the process of the isolation switch provided in the first embodiment of the present invention moving in the second direction from a position in contact with the grounding contact to a position in contact with the isolation contact;

[0043] Figure 16 A schematic structural diagram of a vacuum parallel switch provided in the second embodiment of the present invention;

[0044] Figure 17 A schematic diagram of a connecting rod provided in the second embodiment of the present invention;

[0045] Figures 18-22 A diagram showing a process of the isolation switch provided in the second embodiment of the present invention moving in a first direction from a position in contact with the isolation contact to a position in contact with the grounding contact;

[0046] Figure 23-Figure 25 This is a process diagram of the isolation switch provided in the second embodiment of the present invention moving along the second direction from the position in contact with the grounding contact to the position in contact with the isolation contact.

[0047] In the picture:

[0048] 100. Isolating contacts;

[0049] 200, main busbar;

[0050] 300, isolating switch; 310, auxiliary contact;

[0051] 400, grounding contact; 401, grounding busbar; 402, grounding beam;

[0052] 500, vacuum arc extinguishing mechanism; 510, static contact; 520, moving contact; 530, branch bus;

[0053] 600, transmission mechanism; 601, second elastic member; 602, transmission rod; 6021, insulating portion; 6022, conductive portion; 603, rotating shaft; 610, conductive pull rope; 620, guide member; 621, slideway; 622, opening; 623, first rack; 630, sliding member; 631, pressure contact; 632, second rack; 640, first elastic member; 650, static pulley; 660, pull rod;

[0054] 700, insulation support seat;

[0055] 800, spindle;

[0056] 900. Cabinet. DETAILED DESCRIPTION

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] Example 1

[0062] This embodiment provides a vacuum parallel switch, in which the vacuum arc extinguishing mechanism is arranged on the other side of the movement direction of the isolating knife switch. This can not only increase the insulation distance between the vacuum arc extinguishing mechanism and the isolating knife switch to improve the safety of use, but also make full use of the remaining space in the cabinet, thereby improving the structural compactness of the vacuum parallel switch.

[0063] Specifically, if Figure 1 As shown, the vacuum parallel switch includes an isolating contact 100 , an isolating knife switch 300 , a grounding contact 400 , a vacuum arc extinguishing mechanism 500 and a transmission mechanism 600 .

[0064] The isolating contact 100 is used to electrically connect to the main busbar 200. An auxiliary contact 310 is provided on the isolating switch 300. A grounding contact 400 and a vacuum interrupter 500 are provided on either side of the isolating switch 300. The vacuum interrupter 500 is positioned adjacent to the auxiliary contact 310. The stationary contact 510 of the vacuum interrupter 500 is electrically connected to the main busbar 200, while the movable contact 520 is connected to the transmission mechanism 600. The movable contact 520 maintains contact with the stationary contact 510 under the self-closing force of the vacuum interrupter 500. During the process of the isolating knife switch 300 rotating along the first rotation direction toward the grounding contact 400, the auxiliary contact 310 will contact the transmission mechanism 600, and drive the moving contact 520 to separate from the static contact 510 through the transmission mechanism 600, thereby realizing the opening of the vacuum arc extinguishing mechanism 500; when the auxiliary contact 310 is separated from the transmission mechanism 600, the transmission mechanism 600 can remove the pulling force applied to the moving contact 520. At this time, the moving contact 520 will maintain contact with the static contact 510 under the action of the self-closing force of the vacuum arc extinguishing mechanism 500, thereby realizing the closing of the vacuum arc extinguishing mechanism 500. Of course, the transmission mechanism 600 can also maintain the pulling force applied to the moving contact 520 to keep the moving contact 520 separated from the static contact 510 until the isolating knife switch 300 rotates along the second rotation direction toward the isolating contact 100, and the auxiliary contact 310 contacts the transmission mechanism 600 again, and drives the transmission mechanism to remove the pulling force applied to the moving contact 520. At this time, the moving contact 520 will maintain contact with the static contact 510 under the action of the self-closing force of the vacuum arc extinguishing mechanism 500, thereby realizing the closing of the vacuum arc extinguishing mechanism 500.

[0065] The vacuum parallel switch provided in this embodiment realizes the opening and closing of the vacuum arc extinguishing mechanism 500 through the cooperation of the auxiliary contact 310 and the transmission mechanism 600, so that the vacuum arc extinguishing mechanism 500 can be arranged on the side of the isolation knife switch 300 away from the grounding contact 400, that is, the vacuum arc extinguishing mechanism 500 is away from the movement path of the isolation knife switch 300. Such an arrangement can not only increase the insulation distance between the vacuum arc extinguishing mechanism 500 and the isolation knife switch 300 to improve the safety of use, but also make full use of the remaining space in the cabinet 900 of the vacuum parallel switch, thereby improving the structural compactness of the vacuum parallel switch.

[0066] It is worth noting that the vacuum arc extinguishing mechanism 500 is connected in parallel with the isolation switch 300 and the isolation contact 100 through the transmission mechanism 600 and the auxiliary contact 310. In order to avoid excessive current carried by the vacuum arc extinguishing mechanism 500, when the isolation switch 300 rotates along the second rotation direction, the isolation switch 300 will first contact the isolation contact 100, and then the auxiliary contact 310 will contact the transmission mechanism 600.

[0067] For example, the first rotation direction refers to the direction in which the isolation switch 300 rotates around a fixed axial direction toward the ground contact 400. The second rotation direction refers to the direction in which the isolation switch 300 rotates around a fixed axial direction toward the isolation contact 100.

[0068] In this embodiment, the first rotation direction is clockwise and the second rotation direction is counterclockwise.

[0069] Optionally, continue with Figure 1 The vacuum parallel switch also includes an insulating support base 700, a main shaft 800, and a drive member (not shown). The main shaft 800 is rotatably mounted on the insulating support base 700 and is connected to one end of the isolation switch 300. The drive member is connected to the main shaft 800 and is used to drive the main shaft 800 to rotate, thereby causing the main shaft 800 to drive the isolation switch 300 to rotate in a first rotational direction or a second rotational direction. The rotation of the isolation switch 300 is achieved through the cooperation of the main shaft 800 and the drive member, resulting in a simple structure and convenient control.

[0070] Optionally, the driving member may be a motor, and the isolation knife switch 300 can be rotated in the first rotation direction and the second rotation direction by controlling the forward and reverse rotation of the motor.

[0071] Optionally, one end of the isolation knife switch 300 can be embedded in the main shaft 800, which has a simple structure and is easy to install.

[0072] Further, see Figure 1 The vacuum parallel switch can be installed in the cabinet 900, and the main bus 200 is arranged on the top of the cabinet 900.

[0073] Optionally, the grounding contact 400 may be disposed on a side wall of the cabinet 900. Specifically, in this embodiment, the vacuum parallel switch is provided in plurality, and therefore, the plurality of grounding contacts 400 may be collectively disposed on a grounding bus 401, which is fixed to the side wall of the cabinet 900 via a grounding beam 402.

[0074] Furthermore, if Figure 2-Figure 6As shown, the transmission mechanism 600 includes a conductive pull rope 610, a guide member 620, and a slider 630. One end of the conductive pull rope 610 is connected to the movable contact 520, and the other end is connected to the slider 630. The guide member 620 is disposed opposite the auxiliary contact 310. A slideway 621 is provided within the guide member 620. An opening 622 is provided on the sidewall of the guide member 620, connecting the slideway 621 with the outside world. One end of the slider 630 slides within the slideway 621. The slider 630 is provided with a pressure contact 631 that penetrates the opening 622. The auxiliary contact 310 can drive the slider 630 to move via the pressure contact 631, so that the slider 630 pulls the movable contact 520 and the static contact 510 apart via the conductive pull rope 610. The transmission mechanism 600 has a simple structure and is easy to operate.

[0075] Further, see Figure 3-Figure 7 A first rack 623 is provided on the two opposite inner walls of the opening 622, a second rack 632 is provided on the two opposite side walls of the sliding member 630, and a first elastic member 640 is provided between the sliding member 630 and the guide member 620. The first elastic member 640 is used to engage the second rack 632 with the first rack 623 to lock the sliding member 630.

[0076] It is understandable that the first elastic member 640 may be, but is not limited to, a spring.

[0077] For ease of understanding, the cooperation between the auxiliary contact 310 and the transmission member is briefly described below, assuming that the initial position of the sliding member 630 represents the vacuum arc extinguishing mechanism being in the closed state.

[0078] The isolating knife switch 300 rotates in the first rotation direction by the first angle, which drives the auxiliary contact 310 to contact the pressure contact 631 and applies pressure to the pressure contact 631, so that the sliding member 630 moves away from the opening 622, that is, the second rack 632 is separated from the first rack 623, and the first elastic member 640 is compressed;

[0079] As the isolation switch 300 further rotates along the first rotation direction by a second angle, the auxiliary contact 310 drives the sliding member 630 to move through the pressure contact 631 until the sliding member 630 pulls the conductive pull rope 610 to separate the moving contact 520 from the static contact 510.

[0080] As the isolating knife switch 300 further rotates to a third angle along the first rotation direction, the auxiliary contact 310 will separate from the pressure contact 631. At this time, under the elastic restoring force of the first elastic member 640, the sliding member 630 will move toward the direction close to the opening 622, so that the second rack 632 engages with the first rack 623. At this time, through the locking action of the second rack 632 and the first rack 623, the sliding member 630 will remain stationary to ensure the stability of the vacuum arc extinguishing mechanism 500 opening.

[0081] Optionally, continue with Figure 2 In this embodiment, the end of the pressure contact 631 that contacts the auxiliary contact 310 is curved, and the end of the auxiliary contact 310 is also curved. This arrangement reduces the contact area between the pressure contact 631 and the auxiliary contact 310, which helps improve the smooth rotation of the isolation switch 300 and prevents excessive friction between the auxiliary contact 310 and the pressure contact 631 from affecting the rotation speed of the isolation switch 300.

[0082] Further, see Figure 1 The transmission mechanism 600 further includes a static pulley 650, which is disposed below the movable contact 520. The conductive pull cord 610 is wound around the static contact 510. The static pulley 650 can guide the pulling force of the conductive pull cord 610, making the placement of the vacuum interrupter mechanism 500 more flexible and improving the space utilization of the vacuum parallel switch.

[0083] Optionally, an annular groove is provided on the static pulley 650 for securing the conductive rope 610, and the inner circumferential wall of the annular groove is smooth. Providing an annular groove on the static pulley 650 to secure the conductive rope 610 can improve the connection strength between the conductive rope 610 and the static pulley 650. Furthermore, providing a smooth inner circumferential wall of the annular groove can improve the smoothness of the movement of the conductive rope 610.

[0084] In a possible embodiment, the vacuum parallel switch is provided with multiple static pulleys 650, and multiple static pulleys 650 can be coaxially arranged, that is, all static pulleys 650 are fixed by a connecting shaft. In this way, the synchronization of the disconnection of multiple vacuum parallel switches can be improved.

[0085] Optionally, both ends of the connecting shaft may be fixed on the side walls of the cabinet.

[0086] Further, see Figure 1 The transmission mechanism 600 further includes a pull rod 660 extending along the direction of movement of the movable contact 520. One end of the pull rod 660 is connected to the movable contact 520, and the other end is connected to the conductive pull rope 610. The pull rod 660 connects the movable contact 520 and the conductive pull rope 610, thereby guiding the direction of movement of the movable contact 520 and maintaining a simple structure.

[0087] Optionally, the guide member 620 may be connected to the cabinet body 900 via a support rod (not shown in the figure), which has a simple structure and is easy to install.

[0088] To facilitate understanding, the working process of the vacuum parallel switch provided in this embodiment is now introduced:

[0089] like Figure 8As shown, at this time, the main circuit is in the on state (the isolation knife switch 300 is in contact with the isolation contact 100), the auxiliary contact 310 and the pressure contact 631 are in the off state, and the vacuum interrupter mechanism 500 is in the closed state;

[0090] like Figure 9 As shown, as the isolation switch 300 rotates a certain angle along the first rotation direction, the isolation switch 300 continues to contact the isolation contact 100, the auxiliary contact 310 just contacts the pressure contact 631, and the vacuum interrupter mechanism 500 is in the closed state. At this time, the main circuit and the load circuit are in parallel.

[0091] like Figure 10 and Figure 11 As shown, as the isolating knife switch 300 further rotates a certain angle in the first rotation direction, the auxiliary contact 310 makes pressure contact with the pressure contact 631 and pushes the pressure contact 631 to move, causing the slider 630 to move upward, thereby driving the movable contact 520 to separate from the static contact 510 through the conductive pull rope 610, thereby extinguishing the arc. The vacuum arc extinguishing mechanism 500 is in the open state, and the main circuit is in the disconnected state.

[0092] like Figure 12 and Figure 13 As shown, as the isolation switch 300 further rotates a certain angle along the first rotation direction, the auxiliary contact 310 separates from the pressure contact 631, the sliding member 630 remains stationary, and finally the isolation switch 300 contacts the grounding contact 400;

[0093] like Figure 14 and Figure 15 As shown, the isolating knife switch 300 rotates a certain angle along the second rotation direction, the auxiliary contact 310 makes pressure contact with the pressure contact 631, and pushes the pressure contact 631 to move, so that the sliding member 630 moves downward. At this time, the pulling force of the conductive pull rope 610 on the moving contact 520 is reduced, and the moving contact 520 moves toward the static contact 510 under the self-closing force of the vacuum arc extinguishing mechanism 500 until the isolating knife switch 300 contacts the isolating contact 100, and after the auxiliary contact 310 passes the pressure contact 631, the moving contact 520 contacts the static contact 510 to realize the closing of the vacuum arc extinguishing mechanism 500.

[0094] Example 2

[0095] This embodiment provides a vacuum parallel switch, which has a substantially similar structure to that of the first embodiment, and is improved upon the first embodiment. Therefore, only the differences between the two are described herein, and the structures that are the same as those of the first embodiment are not described in detail.

[0096] Specifically, if Figure 16As shown, in this embodiment, the transmission mechanism 600 includes a second elastic member 601 and a transmission rod 602. One end of the second elastic member 601 is connected to the movable contact 520 and extends along the sliding direction of the movable contact 520. The transmission rod 602 is rotatably arranged, with one end of the transmission rod 602 connected to the other end of the second elastic member 601, and the other end of the transmission rod 602 is arranged opposite the auxiliary contact 310.

[0097] During the process of the isolating knife switch 300 rotating along the first rotation direction, the auxiliary contact 310 can contact the other end of the transmission rod 602 and drive the transmission rod 602 to rotate, so that one end of the transmission rod 602 pulls the moving contact 520 and the static contact 510 apart through the second elastic member 601, and after the auxiliary contact 310 leaves the transmission rod 602, the moving contact 520 will remain in contact with the static contact 510 under the action of the elastic force of the second elastic member 601 and the self-closing force of the vacuum arc extinguishing mechanism 500.

[0098] As the isolation switch 300 rotates in the second rotational direction, the auxiliary contact 310 can contact the other end of the transmission rod 602, driving the transmission rod 602 to rotate to the avoidance position, so that the isolation switch 300 passes over the transmission rod 602 and returns to the position in contact with the isolation contact 100. During this process, because the transmission rod 602 is pressed downward, the movable contact 520 and the static contact 510 always maintain contact.

[0099] It is understandable that the second elastic member 601 may be, but is not limited to, a spring.

[0100] Optionally, continue with Figure 16 In this embodiment, a rotating shaft 603 is provided on the inner wall of the cabinet 900, and the rotating shaft 603 is rotatably passed through the transmission rod 602 to provide support for the transmission rod 602 and realize the rotation setting of the transmission rod 602.

[0101] It can be understood that the two ends of the transmission rod 602 are respectively located on both sides of the rotating shaft 603.

[0102] Furthermore, if Figure 17 As shown, the transmission rod 602 includes an insulating portion 6021 and a conductive portion 6022 ( Figure 17The portion within the dashed box in the middle section shows an insulating portion 6021 disposed proximate to the isolating contact 100, and a conductive portion 6022 electrically connected to the second elastic member 601. When the isolating switch 300 and the movable contact 520 are in a separated state (either during rotation of the isolating switch 300 in the first rotational direction or during rotation of the isolating switch 300 in the second rotational direction), the auxiliary contact 310 contacts the insulating portion 6021 or separates from the transmission rod 602. Due to the high current in the main circuit, if the auxiliary contact 310 contacts and electrically connects to the transmission rod 602 when the isolating switch 300 is not in contact with the isolating contact 100, the vacuum interrupter 500 may be easily damaged by the excessive load current. Therefore, providing the transmission rod 602 with an insulating portion 6021 prevents the isolating switch 300 from being electrically connected to the transmission rod 602 before contacting the isolating contact 100 during rotation in the second direction, thereby facilitating protection of the vacuum interrupter 500.

[0103] Furthermore, the other end of the transmission rod 602 is curved, as is the end of the auxiliary contact 310. This arrangement reduces the contact area between the transmission rod 602 and the auxiliary contact 310, thereby improving the smoothness of the rotation of the isolation switch 300 and preventing excessive friction between the auxiliary contact 310 and the transmission rod 602 from affecting the rotation speed of the isolation switch 300.

[0104] Further, see Figure 17 The transmission rod 602 includes a transmission rod body and a transmission section located at one end of the transmission rod body near the auxiliary contact 310. The thickness a of the transmission section is less than the thickness b of the transmission rod body. This arrangement ensures the strength of the transmission rod 602 and reduces the risk of deformation of the transmission rod 602, while also minimizing material consumption and reducing the weight of the transmission rod 602.

[0105] To facilitate understanding, the working process of the vacuum parallel switch provided in this embodiment is now introduced:

[0106] like Figure 18 As shown, at this time, the main circuit is in the on state (the isolation knife switch 300 is in contact with the isolation contact 100), the auxiliary contact 310 and the transmission rod 602 are in the off state, and the vacuum interrupter mechanism 500 is in the closed state;

[0107] like Figure 19 As shown, as the isolation switch 300 rotates a certain angle along the first rotation direction, the isolation switch 300 continues to contact the isolation contact 100, the auxiliary contact 310 just contacts the transmission rod 602, and the vacuum interrupter mechanism 500 is in the closed state. At this time, the main circuit and the load circuit are in parallel.

[0108] like Figure 20As shown, as the isolating knife switch 300 further rotates a certain angle in the first rotation direction, the auxiliary contact 310 contacts the transmission rod 602 and pushes this end of the transmission rod 602 to move upward, thereby causing the other end of the transmission rod 602 to move downward. The second elastic member 601 pulls the moving contact 520 and the static contact 510 apart, thereby extinguishing the arc. The vacuum arc extinguishing mechanism 500 is in the open state, and the main circuit is in the disconnected state.

[0109] like Figure 21 and Figure 22 As shown, as the isolating switch 300 further rotates a certain angle in the first rotation direction, the auxiliary contact 310 separates from the transmission rod 602, and the movable contact 520 remains in contact with the static contact 510 under the elastic force of the second elastic member 601 and the self-closing force of the vacuum interrupter mechanism 500, and finally the isolating switch 300 contacts the grounding contact 400;

[0110] like Figure 23-Figure 25 As shown, the isolation switch 300 rotates a certain angle along the second rotation direction, the auxiliary contact 310 contacts the insulating portion 6021 of the transmission rod 602, and pushes this end of the transmission rod 602 to move downward, so that the auxiliary contact 310 passes over the transmission rod 602, and finally the isolation switch 300 contacts the isolation contact 100.

[0111] Example 3

[0112] This embodiment provides a switch cabinet, including a cabinet body 900 and the vacuum parallel switch provided in the first or second embodiment. The vacuum parallel switch is disposed in the cabinet body 900 .

[0113] Since the switch cabinet adopts the above-mentioned vacuum parallel switch, it has high safety in use and a relatively compact structure.

[0114] In this embodiment, the main busbar 200 is located at the top of the cabinet 900, and the isolation contact 100 is located in the middle of the main busbar 200. When the isolation switch 300 is in a vertical position, one end of the isolation switch 300 contacts the isolation contact 100. A vacuum interrupter mechanism 500 is located on the left side of the isolation switch 300 (at the upper left of the cabinet 900), and a grounding contact 400 is located on the right side of the isolation switch 300 (at the lower right of the cabinet 900). This arrangement fully utilizes the internal space of the cabinet 900 and achieves a compact structure.

[0115] 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, characterized in that, include: An isolation contact (100) for electrically connecting to a main busbar (200); An isolating knife switch (300), wherein the isolating knife switch (300) is provided with an auxiliary contact (310); A grounding contact (400) is provided on one side of the isolation knife switch (300), and the isolation knife switch (300) can rotate in a first rotation direction to contact the grounding contact (400), or rotate in a second rotation direction to contact the isolation contact (100); A vacuum arc extinguishing mechanism (500) is provided on the other side of the isolating knife switch (300), the vacuum arc extinguishing mechanism (500) comprising a static contact (510) and a moving contact (520), the static contact (510) being used for being electrically connected to the main busbar (200), and the moving contact (520) being capable of contacting the static contact (510) under the action of a self-closing force; A transmission mechanism (600) is connected to the moving contact (520), and when the isolating knife switch (300) rotates along the first rotation direction, the auxiliary contact (310) can be engaged with the transmission mechanism (600), and the moving contact (520) is driven to separate from the static contact (510) through the transmission mechanism (600); The transmission mechanism (600) includes a conductive pull rope (610), a guide member (620) and a sliding member (630), one end of the conductive pull rope (610) is connected to the moving contact (520), the guide member (620) is arranged opposite to the auxiliary contact (310), a slideway (621) is provided in the guide member (620), and an opening (622) connecting the slideway (621) and the outside world is provided on the side wall of the guide member (620), and the sliding member (630) is provided with a plurality of guide members. One end is slidably arranged in the slideway (621), and the other end is connected to the other end of the conductive pull rope (610); the sliding member (630) is provided with a pressure contact (631) passing through the opening (622); the auxiliary contact (310) can drive the sliding member (630) to move through the pressure contact (631), so that the sliding member (630) pulls the moving contact (520) and the static contact (510) apart through the conductive pull rope (610); Alternatively, the transmission mechanism (600) includes a second elastic member (601) and a transmission rod (602), one end of the second elastic member (601) is connected to the moving contact (520) and extends along the sliding direction of the moving contact (520), one end of the transmission rod (602) is connected to the other end of the second elastic member (601), and the other end of the transmission rod (602) is arranged opposite to the auxiliary contact (310), and the auxiliary contact (310) can be connected to the transmission rod (60 2) contacts and drives the transmission rod (602) to rotate, so that one end of the transmission rod (602) pulls the moving contact (520) and the static contact (510) apart through the second elastic member (601), and when the auxiliary contact (310) is separated from the transmission rod (602), the moving contact (520) will maintain contact with the static contact (510) under the action of the elastic force of the second elastic member (601) and the self-closing force of the vacuum arc extinguishing mechanism (500).

2. The vacuum parallel switch according to claim 1, characterized in that: A first rack (623) is provided on two opposite inner walls of the opening (622), a second rack (632) is provided on two opposite side walls of the sliding member (630), a first elastic member (640) is provided between the sliding member (630) and the guide member (620), and the first elastic member (640) is used to make the second rack (632) engage with the first rack (623) to lock the sliding member (630).

3. The vacuum parallel switch according to claim 1, characterized in that: The end of the pressure contact (631) in contact with the auxiliary contact (310) is arc-shaped, and the end of the auxiliary contact (310) is also arc-shaped.

4. The vacuum parallel switch according to claim 1, characterized in that: The transmission mechanism (600) further includes a static pulley (650), the static pulley (650) being arranged below the moving contact (520), and the conductive pull rope (610) being wound around the static contact (510).

5. The vacuum parallel switch according to claim 1, characterized in that: The transmission rod (602) comprises an insulating portion (6021) and a conductive portion (6022) which are stacked together, wherein the insulating portion (6021) is close to the isolation contact (100), and the conductive portion (6022) is electrically connected to the second elastic member (601). When the isolation knife switch (300) and the isolation contact (100) are in a separated state, the auxiliary contact (310) contacts the insulating portion (6021) or separates from the transmission rod (602).

6. The vacuum parallel switch according to claim 1, characterized in that: The transmission rod (602) comprises a transmission rod body and a transmission section arranged at one end of the transmission rod body close to the auxiliary contact (310), and a thickness a of the transmission section is smaller than a thickness b of the transmission rod body.

7. The vacuum parallel switch according to any one of claims 1 to 6, characterized in that: The vacuum parallel switch also includes: Insulation support seat (700); A main shaft (800) is rotatably disposed on the insulating support seat (700), and the main shaft (800) is connected to one end of the isolation knife switch (300); A driving member is connected to the main shaft (800), and is used to drive the main shaft (800) to rotate, so that the main shaft (800) drives the isolation knife switch (300) to rotate along the first rotation direction or the second rotation direction.

8. Switchgear, characterized in that, The invention comprises a cabinet (900) and the vacuum parallel switch according to any one of claims 1 to 7, wherein the vacuum parallel switch is arranged in the cabinet (900).

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