Vacuum parallel switch and switch cabinet

Abstract

The invention relates to the technical field of switch devices, and particularly discloses a vacuum parallel switch and a switch cabinet. The vacuum parallel switch comprises an isolation contact, an isolation disconnecting link, a grounding contact, a vacuum arc extinguishing mechanism and a transmission mechanism. The isolation contact is used for being electrically connected with a main bus; the isolation switch is provided with an auxiliary contact. The grounding contact is arranged on one side of the isolation switch and can rotate along a first rotation direction to be contacted with the grounding contact or rotate along a second rotation direction to be contacted with the isolation contact; the vacuum arc-extinguishing mechanism is arranged on the other side of the isolation switch, a static contact of the vacuum arc-extinguishing mechanism is used for being electrically connected with a main bus, and a moving contact of the vacuum arc-extinguishing mechanism can be in contact with the static contact under the action of self-closing force; the transmission mechanism is connected with the moving contact, and in the process that the isolation disconnecting link rotates in the first rotation direction, the auxiliary contact can be clamped with the transmission mechanism, and the moving contact is driven to be separated from the static contact through the transmission mechanism. The vacuum parallel switch is high in use safety and compact in 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 switch cabinets that use environmentally friendly gases such as dry air to replace SF6 gas, vacuum interrupters are usually installed in series or in parallel with isolation switches to meet the requirements for breaking performance. In the series structure, both the isolation switch and the vacuum interrupter must withstand the dynamic thermal stability current and the working current, and the mechanical transmission structure is relatively complex and costly. In the parallel structure, only the isolation switch withstands the dynamic thermal stability current and the working current, and the vacuum interrupter only plays an arc extinguishing role when breaking the load current, that is, the isolation switch is the main circuit, and the vacuum interrupter is the auxiliary arc extinguishing circuit. The structure is simple and the cost is low, which has a very superior market prospect compared to the series solution.

[0003] At present, the parallel structure generally adds a vacuum interrupter between the static contact and the grounding contact of the rotary blade type disconnector, and sets a transmission mechanism at the pull rod end of the vacuum interrupter, so that the circuit in the vacuum interrupter can be disconnected through the transmission mechanism during the movement of the rotary blade type disconnector between the static contact and the grounding contact. This solution makes the vacuum interrupter closer to the isolation knife switch, which is less safe to use, and also wastes other available space in the cabinet, making the overall volume larger.

[0004] Therefore, it is urgent to propose a vacuum parallel switch and a switch cabinet 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, 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, comprising:

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

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

[0010] A grounding contact is arranged on one side of the isolating knife switch, and the isolating knife switch can rotate along a first rotation direction to contact the grounding contact, or rotate along a second rotation direction to contact the isolating contact;

[0011] A vacuum arc extinguishing mechanism is arranged on the other side of the isolating knife switch, and the vacuum arc extinguishing mechanism comprises a static contact and a moving contact, wherein the static contact is used to be electrically connected to the main bus, and the moving contact can contact with 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 be engaged with the transmission mechanism, and the moving contact is driven 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 refers to the auxiliary contact applying a force to the transmission mechanism, and this force can make the transmission mechanism drive the moving contact to separate from the static contact.

[0014] Optionally, the transmission mechanism comprises:

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

[0016] A guide member, arranged opposite to the auxiliary contact, wherein a slideway is arranged inside the guide member, and an opening connecting the slideway and the outside is arranged on a side wall of the guide member;

[0017] A sliding member, one end of which is slidably arranged in the slideway, and the other end of which 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 two opposite inner walls of the opening, a second rack is provided on two opposite side walls of the sliding member, 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 in contact with 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, the static pulley is arranged below the moving contact, and the conductive pull rope is wound around the static contact.

[0021] Optionally, the transmission mechanism comprises:

[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 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 which are stacked, the insulating part is close to the isolating contact, and the conductive part is electrically connected to the second elastic member, and when the isolating knife switch and the isolating 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 comprises a transmission rod body and a transmission segment arranged 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 isolating 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 described in 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 the cooperation between the 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 movement path of the vacuum arc extinguishing mechanism away from the isolating knife switch is arranged in this way, which can increase the insulation distance between the vacuum arc extinguishing mechanism and the isolating knife switch to improve the use safety, and can make full use of the remaining space in the cabinet of the vacuum parallel switch, thereby improving the compactness of the structure 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. The switch cabinet has high safety in use and a relatively compact structure because it adopts the above-mentioned vacuum parallel switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic diagram of the structure of a vacuum parallel switch provided in Embodiment 1 of the present invention;

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

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

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

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

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

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

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

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

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

[0044] Fig.17 A schematic diagram of a connecting rod provided in Embodiment 2 of the present invention;

[0045] Figure 18-Figure 22 A diagram showing a process in which the isolating knife switch provided in the second embodiment of the present invention moves along a first direction from a position in contact with an isolating contact to a position in contact with a grounding contact;

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

[0047] In the figure:

[0048] 100. Isolating contacts;

[0049] 200, main busbar;

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

[0051] 400, grounding contact; 401, grounding bus; 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 part; 6022, conductive part; 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, insulating support seat;

[0055] 800, spindle;

[0056] 900. Cabinet. DETAILED DESCRIPTION

[0057] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0058] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot 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 "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates 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 clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0061] Embodiment 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, 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.

[0063] Specifically, 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] Among them, the isolation contact 100 is used to be electrically connected to the main bus 200. An auxiliary contact 310 is provided on the isolation knife switch 300. The grounding contact 400 and the vacuum arc extinguishing mechanism 500 are respectively arranged on both sides of the isolation knife switch 300, and the vacuum arc extinguishing mechanism 500 is arranged close to the auxiliary contact 310. The static contact 510 of the vacuum arc extinguishing mechanism 500 is electrically connected to the main bus 200, and the moving contact 520 is connected to the transmission mechanism 600. The moving contact 520 can maintain contact with the static contact 510 under the self-closing force of the vacuum arc extinguishing mechanism 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 isolating 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 isolating knife switch 300. Such an arrangement can not only increase the insulation distance between the vacuum arc extinguishing mechanism 500 and the isolating 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 isolating knife switch 300 and the isolating 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 isolating knife switch 300 rotates along the second rotation direction, the isolating knife switch 300 will first contact the isolating contact 100, and then the auxiliary contact 310 will contact the transmission mechanism 600.

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

[0068] In this embodiment, it is described by taking the first rotation direction as a clockwise direction and the second rotation direction as a counterclockwise direction as an example.

[0069] Optionally, continue to see Figure 1 The vacuum parallel switch also includes an insulating support seat 700, a main shaft 800 and a driving member (not shown in the figure). The main shaft 800 is rotatably arranged on the insulating support seat 700, and the main shaft 800 is connected to one end of the isolation knife switch 300. The 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. The rotation of the isolation knife switch 300 is achieved by the cooperation of the main shaft 800 and the driving member, and the structure is simple and the control is convenient.

[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 rotation 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 arranged on the side wall of the cabinet 900. Specifically, in this embodiment, the vacuum parallel switch is provided with a plurality of grounding contacts 400, so the plurality of grounding contacts 400 may be arranged together on the grounding bus 401, and the grounding bus 401 is fixed to the side wall of the cabinet 900 through the 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 sliding member 630. Among them, one end of the conductive pull rope 610 is connected to the moving contact 520, and the other end is connected to the sliding member 630. The guiding member 620 is arranged opposite to the auxiliary contact 310, and a slideway 621 is arranged in the guiding member 620. An opening 622 connecting the slideway 621 and the outside is arranged on the side wall of the guiding member 620. One end of the sliding member 630 is slidably arranged in the slideway 621, and a pressure contact 631 is arranged on the sliding member 630 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 to separate through 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 make the second rack 632 engage 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 introduced with the initial position of the sliding member 630 being the case where the vacuum arc extinguishing mechanism is in a closed state:

[0078] The isolating knife switch 300 rotates in the first rotation direction by the first angle to drive the auxiliary contact 310 to contact the pressure contact 631 and exert pressure on the pressure contact 631, so that the sliding member 630 moves in the direction 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 isolating knife switch 300 further rotates to a second angle along the first rotation direction, 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 stationary 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 is engaged 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.

[0081] Optionally, continue to see Figure 2 In this embodiment, the end of the pressure contact 631 that contacts the auxiliary contact 310 is arc-shaped, and the end of the auxiliary contact 310 is also arc-shaped. This arrangement makes the contact area between the pressure contact 631 and the auxiliary contact 310 smaller, which is conducive to improving the smoothness of the rotation of the isolation knife switch 300 and avoiding the influence of the rotation speed of the isolation knife switch 300 due to excessive friction between the auxiliary contact 310 and the pressure contact 631.

[0082] Further, see Figure 1 The transmission mechanism 600 further includes a static pulley 650, which is disposed below the moving contact 520, and the conductive pull rope 610 is wound around the static contact 510. The static pulley 650 can guide the pulling direction of the conductive pull rope 610, so that the vacuum arc extinguishing mechanism 500 can be set more flexibly, which is conducive to improving the space utilization rate of the vacuum parallel switch.

[0083] Optionally, an annular groove is provided on the static pulley 650, and the annular groove is used to fix the conductive pull rope 610, and the inner peripheral wall of the annular groove is set smoothly. By setting the annular groove on the static pulley 650 to fix the conductive pull rope 610, the connection strength between the conductive pull rope 610 and the static pulley 650 can be improved, and the inner peripheral wall of the annular groove is set smoothly, which can improve the smoothness of the movement of the conductive pull 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, so that the synchronization of disconnection of multiple vacuum parallel switches can be improved.

[0085] Optionally, both ends of the connecting shaft can 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 moving direction of the moving contact 520, one end of the pull rod 660 is connected to the moving contact 520, and the other end is connected to the conductive pull rope 610. The moving contact 520 and the conductive pull rope 610 are connected by the pull rod 660, so that the moving direction of the moving contact 520 can be guided, and the structure is simple.

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

[0088] For ease of 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 isolating knife switch 300 is in contact with the isolating contact 100), the auxiliary contact 310 and the pressure contact 631 are in the off state, and the vacuum arc extinguishing mechanism 500 is in the closed state;

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

[0091] like Fig.10 and Fig.11 As shown, as the isolating knife switch 300 further rotates a certain angle along the first rotation direction, the auxiliary contact 310 and the pressure contact 631 are pressure-touched and push the pressure contact 631 to move, so that the sliding member 630 moves upward, so as to drive the moving contact 520 to separate from the static contact 510 through the conductive pull rope 610, so as to achieve arc extinguishing, and the vacuum arc extinguishing mechanism 500 is in the open state, and the main circuit is in the disconnected state;

[0092] like Fig.12 and Fig.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, and the sliding member 630 remains stationary, and finally the isolation switch 300 contacts the grounding contact 400;

[0093] like Fig.14 and Fig.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 over 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] Embodiment 2

[0095] This embodiment provides a vacuum parallel switch, which is substantially the same in structure as the first embodiment, and is only improved on the basis of the first embodiment. Therefore, only the differences between the two are described here, and the same structures of this embodiment and the first embodiment are not described here.

[0096] Specifically, Fig.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 moving contact 520 and extends along the sliding direction of the moving contact 520. The transmission rod 602 is rotatably arranged, 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.

[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] When the isolation knife switch 300 rotates in the second rotation direction, the auxiliary contact 310 can contact the other end of the transmission rod 602 and drive the transmission rod 602 to rotate to the avoidance position, so that the isolation knife switch 300 passes over the transmission rod 602 and returns to the position in contact with the isolation contact 100. In this process, since the transmission rod 602 is pressed down, the moving contact 520 and the static contact 510 always keep in contact.

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

[0100] Optionally, continue to see Fig.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 penetrated 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 two sides of the rotating shaft 603 .

[0102] Furthermore, if Fig.17 As shown, the transmission rod 602 includes an insulating portion 6021 and a conductive portion 6022 ( Fig.17The insulating portion 6021 is arranged close to the isolating contact 100, and the conductive portion 6022 is electrically connected to the second elastic member 601. When the isolating knife switch 300 and the moving contact 520 are in a separated state (it can be during the process of the isolating knife switch 300 rotating along the first rotation direction, or it can be during the process of the isolating knife switch 300 rotating along the second rotation direction), the auxiliary contact 310 contacts the insulating portion 6021 or is separated from the transmission rod 602. Since the main circuit current is relatively large, if the isolating knife switch 300 is not in contact with the isolating contact 100, and the auxiliary contact 310 is in contact and electrically connected with the transmission rod 602, it is easy to damage the vacuum arc extinguishing mechanism 500 due to excessive load current. Therefore, the transmission rod 602 is provided with the insulating portion 6021, which can avoid the isolating knife switch 300 being electrically connected to the transmission rod 602 before contacting the isolating contact 100 during the process of rotating along the second direction, which is beneficial to protecting the vacuum arc extinguishing mechanism 500.

[0103] Furthermore, the other end of the transmission rod 602 is arc-shaped, and the end of the auxiliary contact 310 is also arc-shaped. This arrangement makes the contact area between the transmission rod 602 and the auxiliary contact 310 smaller, which is conducive to improving the smoothness of the rotation of the isolation knife switch 300 and avoiding the influence of the rotation speed of the isolation knife switch 300 due to excessive friction between the auxiliary contact 310 and the transmission rod 602.

[0104] Further, see Fig.17 The transmission rod 602 includes a transmission rod body and a transmission section disposed at one end of the transmission rod body close to the auxiliary contact 310, and the thickness a of the transmission section is less than the thickness b of the transmission rod body. Such a configuration can ensure the strength of the transmission rod 602 and reduce the risk of deformation of the transmission rod 602, and can also save materials as much as possible and reduce the weight of the transmission rod 602.

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

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

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

[0108] like Fig. 20As shown, as the isolating knife switch 300 further rotates a certain angle along 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, and the moving contact 520 is pulled apart from the static contact 510 by the second elastic member 601 to achieve arc extinguishing, and the vacuum arc extinguishing mechanism 500 is in an open state, and the main circuit is in a disconnected state;

[0109] like Fig.21 and Fig. 22 As shown, as the isolating knife switch 300 further rotates a certain angle along the first rotation direction, the auxiliary contact 310 separates from the transmission rod 602, and the moving contact 520 keeps 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 arc extinguishing mechanism 500, and finally the isolating knife switch 300 contacts with the grounding contact 400;

[0110] like Figure 23-Figure 25 As shown, the isolating knife 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 isolating knife switch 300 contacts the isolating contact 100.

[0111] Embodiment 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, and the vacuum parallel switch is arranged 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, the isolating contact 100 is arranged in the middle of the main busbar 200, one end of the isolating knife switch 300 is in contact with the isolating contact 100 when it is in a vertical state, a vacuum arc extinguishing mechanism 500 is arranged on the left side of the isolating knife switch 300 (at the upper left position of the cabinet 900), and a grounding contact 400 is arranged on the right side of the isolating knife switch 300 (at the lower right position of the cabinet 900). Such an arrangement can make full use of the internal space of the cabinet 900 and has a compact structure.

[0115] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. Vacuum parallel switch, characterized in that: include: An isolating contact (100) for electrically connecting to a main busbar (200); An isolating knife switch (300), wherein an auxiliary contact (310) is provided on the isolating knife switch (300); A grounding contact (400) is arranged on one side of the isolating knife switch (300), and the isolating knife switch (300) can rotate along a first rotation direction to contact the grounding contact (400), or rotate along a second rotation direction to contact the isolating contact (100); A vacuum arc extinguishing mechanism (500) is arranged 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 to be electrically connected to the main busbar (200), and the moving contact (520) being able to contact the static contact (510) under the action of a self-closing force; The transmission mechanism (600) is connected to the moving contact (520). When the isolating knife switch (300) rotates along the first rotation direction, the auxiliary contact (310) can engage with the transmission mechanism (600) and drive the moving contact (520) to separate from the static contact (510) through the transmission mechanism (600).

2. The vacuum parallel switch according to claim 1, characterized in that: The transmission mechanism (600) comprises: A conductive pull rope (610), one end of which is connected to the moving contact (520); A guide member (620) is arranged opposite to the auxiliary contact (310), a slideway (621) is provided inside the guide member (620), and an opening (622) connecting the slideway (621) and the outside is provided on a side wall of the guide member (620); A sliding member (630) has one end slidingly disposed in the slideway (621), and the other end connected to the other end of the conductive pull rope (610). The sliding member (630) is provided with a pressure contact (631) penetrating 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) to separate through the conductive pull rope (610).

3. The vacuum parallel switch according to claim 2, 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).

4. The vacuum parallel switch according to claim 2, characterized in that: The end of the pressure contact (631) that contacts the auxiliary contact (310) is arc-shaped, and the end of the auxiliary contact (310) is also arc-shaped.

5. The vacuum parallel switch according to claim 2, characterized in that: The transmission mechanism (600) further comprises a static pulley (650), wherein the static pulley (650) is arranged below the moving contact (520), and the conductive pull rope (610) is wound around the static contact (510).

6. The vacuum parallel switch according to claim 1, characterized in that: The transmission mechanism (600) comprises: A second elastic member (601), one end of which is connected to the moving contact (520) and extends along the sliding direction of the moving contact (520); A transmission rod (602), 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). 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 separates from the static contact (510) 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).

7. The vacuum parallel switch according to claim 6, characterized in that: The transmission rod (602) comprises an insulating portion (6021) and a conductive portion (6022) which are stacked, the insulating portion (6021) being close to the isolating contact (100), and the conductive portion (6022) being electrically connected to the second elastic member (601); when the isolating knife switch (300) and the isolating contact (100) are in a separated state, the auxiliary contact (310) is in contact with the insulating portion (6021) or is separated from the transmission rod (602).

8. The vacuum parallel switch according to claim 6, 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.

9. The vacuum parallel switch according to any one of claims 1 to 8, 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.

10. A switch cabinet, characterized in that: It comprises a cabinet (900) and the vacuum parallel switch according to any one of claims 1 to 9, wherein the vacuum parallel switch is arranged in the cabinet (900).

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