Parallel switch device and gas insulated switch cabinet with same

Abstract

The invention relates to a parallel type switch device and a gas insulation switch cabinet with the same, and the parallel type switch device comprises an isolation switch which comprises an isolation static contact and an isolation moving contact which can move to a switching-on position and an isolation position relative to the isolation static contact; the vacuum switch comprises a vacuum static contact electrically connected with the isolation static contact and a vacuum moving contact capable of moving to a closing position and a breaking position relative to the vacuum static contact, and the linkage mechanism comprises a retaining component capable of moving relative to the isolation static contact and a driving component linked with the vacuum moving contact. The holding member can hold the vacuum moving contact at the breaking position through the driving member when the isolating moving contact is at the isolating position, and can be driven by the isolating moving contact to move relative to the isolating static contact when the isolating moving contact faces the closing position. Therefore, the driving component is allowed to drive the vacuum moving contact to the closed position after the isolating moving contact is in contact with the isolating static contact.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical equipment, in particular to a parallel switch device and a gas insulated switchgear having the same. BACKGROUND

[0002] The gas insulated switchgear such as a ring main unit is widely used in the scenes of ring network power supply network, urban power distribution station and new energy station as a core device for power distribution and control in a power system. The gas insulated switchgear usually seals circuit breakers, disconnectors, grounding switches and busbars and other electrical elements in a gas tank by means of sulfur hexafluoride gas to ensure safe and stable operation.

[0003] In recent years, with the promotion of global carbon neutralization strategy, sulfur hexafluoride gas as a strong greenhouse gas is gradually being replaced by environmentally friendly gases such as nitrogen and dry air, but research shows that the insulation strength of such environmentally friendly gases is much lower than that of sulfur hexafluoride. Therefore, in order to meet the insulation performance requirements of environmentally friendly switchgears, the existing environmentally friendly switchgears can adopt a combination scheme of vacuum switches and disconnectors to extinguish the arc through the vacuum switch when the disconnector is broken. However, in this scheme, the vacuum switch and the disconnector need to be configured with independent operating mechanisms, which will cause the user to need to operate two sets of operating mechanisms with different operating modes during the breaking operation, which obviously causes the problems of complex and cumbersome operation and significantly increased manufacturing cost.

[0004] Therefore, there is a need in the art for a switch device with simple and reliable structure, convenient operation and low manufacturing cost in a gas insulated switchgear. SUMMARY

[0005] The present application aims to provide a parallel switch device which can at least solve some of the above problems.

[0006] The present application also aims to provide a gas insulated switchgear applying the improved parallel switch device.

[0007] According to one aspect of the present application, there is provided a parallel switch device, comprising: an isolating switch comprising an isolating static contact and an isolating moving contact movable relative to the isolating static contact to an on-position and an isolating position, the isolating moving contact being engaged with the isolating static contact when in the on-position and disengaged from the isolating static contact when in the isolating position; a vacuum switch comprising a vacuum static contact electrically connected with the isolating static contact and a vacuum moving contact movable relative to the vacuum static contact to a closed position and an open position, the vacuum moving contact being engaged with the vacuum static contact when in the closed position and disengaged from the vacuum static contact when in the open position; a linkage mechanism comprising a holding member movable relative to the isolating static contact and a driving member linked with the vacuum moving contact, wherein the holding member is capable of holding the vacuum moving contact in the open position via the driving member when the isolating moving contact is in the isolating position, and is capable of being driven by the isolating moving contact to move relative to the isolating static contact when the isolating moving contact is moved towards the on-position, thereby allowing the driving member to drive the vacuum moving contact to the closed position after the isolating moving contact contacts the isolating static contact.

[0008] Compared with the prior art, the parallel switch device in the present application not only can be applied to environmentally friendly gas insulated switchgear by virtue of the arc extinguishing function of the vacuum arc chamber, but also can realize the operation of the isolating switch and the vacuum switch through one set of operation mechanism, thus being simple in structure, low in manufacturing cost and convenient for operators to operate. In addition, the linkage relationship between the isolating moving contact and the linkage mechanism is designed ingeniously to keep the vacuum switch open when the isolating switch is opened and to close the vacuum switch after the isolating switch is closed, thereby improving the safety and reliability of the parallel switch device.

[0009] Preferably, the holding member comprises a pivot end and a receiving end away from the pivot end, the receiving end being provided with a receiving opening capable of receiving the isolating static contact therein.

[0010] Preferably, the holding member is provided with a locking protrusion adjacent to the pivot end, and the driving member is provided with a locking recess for cooperating with the locking protrusion, wherein the locking protrusion of the holding member is locked together with the locking recess of the driving member when the isolating moving contact is in the isolating position, and the receiving end of the holding member is capable of being pivoted by the isolating moving contact after the isolating moving contact is moved towards the isolating static contact to the on-position, so that the locking protrusion of the holding member is unlocked from the locking recess of the driving member.

[0011] Preferably, the drive end of the holding member is provided with a holding reset member, so that the isolating static contact, after moving towards the closed position to contact the isolating static contact, can drive the holding member to pivot about its pivot end against the force of the holding reset member.

[0012] Preferably, the drive member comprises a drive cam and a drive rod capable of being driven by the drive cam and linked with the vacuum dynamic contact, wherein the outer periphery of the drive cam comprises a holding profile for cooperating with the holding member and a drive profile for cooperating with the drive rod, and the locking recess is arranged on the holding profile.

[0013] Preferably, the holding profile of the drive cam is provided with an abutting section adjacent to one side of the drive profile, wherein the abutting section can abut against and be driven by the isolating dynamic contact to pivot during the isolating dynamic contact moving from the closed position to the isolating position.

[0014] Preferably, the abutting section of the drive cam is configured to abut against the isolating dynamic contact before the isolating dynamic contact is completely disengaged from the isolating static contact, and to disengage from the isolating dynamic contact before the isolating dynamic contact moves from the closed position to the isolating position, wherein the drive cam can be driven by the isolating dynamic contact to pivot when the abutting section abuts against the isolating dynamic contact, so that the drive profile of the drive section can drive the vacuum dynamic contact to move to the open position via the drive rod.

[0015] Preferably, the drive cam is further provided with a drive reset member, so that the isolating dynamic contact can drive the drive cam to pivot against the force of the drive reset member when abutting against the abutting section.

[0016] Preferably, the parallel switch device further comprises a grounding contact arranged on the other side of the isolating dynamic contact relative to the isolating static contact, so that the isolating dynamic contact is engaged with the grounding contact when moving to the grounding position.

[0017] According to another aspect of the present application, there is also provided a gas insulated switchgear comprising the aforementioned parallel switch device.

[0018] Some of the other features and advantages of the present application will be apparent from the detailed description that follows, taken in conjunction with the accompanying drawings, which together illustrate by way of example, not limitation, certain principles of the application. BRIEF DESCRIPTION OF DRAWINGS

[0019] Embodiments of the present application will be described below in detail with reference to the accompanying drawings, in which:

[0020] Figure 1is a perspective view of a parallel switchgear according to an embodiment of the present application, wherein the disconnectors of the parallel switchgear are in a closed state and the vacuum switches are in a closed state;

[0021] Figure 2 is a first side view of a parallel switchgear according to an embodiment of the present application, wherein the disconnectors of the parallel switchgear are in a closed state and the vacuum switches are in a closed state;

[0022] Figure 3 is Figure 1 is a partial side view of a linkage mechanism of the parallel switchgear shown in

[0023] Figure 4 is Figure 1 is a partial perspective view of a linkage mechanism of the parallel switchgear shown in

[0024] Figure 5 is a second side view of a parallel switchgear according to an embodiment of the present application;

[0025] Figure 6 is a third side view of a parallel switchgear according to an embodiment of the present application;

[0026] Figure 7 is a fourth side view of a parallel switchgear according to an embodiment of the present application;

[0027] Figure 8 is a fifth side view of a parallel switchgear according to an embodiment of the present application, wherein the disconnectors of the parallel switchgear are in an open state and the vacuum switches are in an open state;

[0028] Figure 9 is a sixth side view of a parallel switchgear according to an embodiment of the present application, wherein the disconnectors of the parallel switchgear are in a grounded state and the vacuum switches are in an open state;

[0029] Figure 10 is a seventh side view of a parallel switchgear according to an embodiment of the present application;

[0030] Figure 11 is an eighth side view of a parallel switchgear according to an embodiment of the present application.

[0031] BRIEF DESCRIPTION OF THE DRAWINGS:

[0032] 100 - Parallel switchgear; 10 - Disconnecting switch; 11 - Stationary isolating contact; 12 - Moving isolating contact; 13 - Grounding contact; 20 - Vacuum switch; 22 - Moving conductive rod; 23 - Vacuum interrupter; 30 - Linkage mechanism; 31 - Holding member; 311 - Pivoting end; 312 - Receiving end; 313 - Receiving opening; 314 - Locking protrusion; 32 - Driving member; 321 - Driving cam; 321a - Cam plate; 321 b - Cam drive; 3211 - Holding profile; 3212 - Driving profile; 3212a - First curved section; 3212b - Second curved section; 3213 - Locking recess; 3214 - Abutting section; 3215 - Base circle profile; 322 - Drive rod; 3221 - Rolling pin; 3222 - Connecting opening; 41 - Support frame; 42 - Support column; 43 - Grounding bracket; 51 - First stationary contact connector; 52 - Second stationary contact connector. Detailed Implementation

[0033] A schematic representation of a parallel switching device within a gas-insulated switchgear disclosed in this invention will now be described in detail with reference to the accompanying drawings. Although the drawings are provided to illustrate some embodiments of the invention, they are not necessarily drawn to the dimensions of the specific embodiments, and certain features may be enlarged, removed, or partially cut to better illustrate and explain the disclosure of the invention. Some components in the drawings may be repositioned according to actual needs without affecting the technical effect. The phrase "in the drawings" or similar expressions appearing in the specification do not necessarily refer to all drawings or examples.

[0034] Certain directional terms used in the description of the accompanying drawings below, such as “inner,” “outer,” “above,” “below,” and other directional terms, will be understood to have their normal meaning and refer to those directions as normally viewed in the accompanying drawings. Unless otherwise specified, the directional terms used in this specification are generally in accordance with the conventional directions understood by those skilled in the art.

[0035] The terms “first,” “first,” “second,” “second,” and similar terms used in this invention do not indicate any order, quantity, or importance, but are used to distinguish one component from others.

[0036] The terms “joining”, “connection” and similar terms used in this invention include both indirect connection of two components with the aid of an intermediate layer such as an adhesive, a welding agent or an intermediate component such as a connector or a transition piece, and direct connection of two components without the aid of any intermediate layer such as an adhesive, a welding agent or an intermediate component such as a connector or a transition piece.

[0037] Figures 1 to 11A parallel switchgear 100 within a gas-insulated switchgear is illustrated by way of example. This parallel switchgear 100 is simple and reliable in structure, easy to operate, and has low manufacturing cost, making it particularly suitable for gas-insulated switchgear using environmentally friendly gases as the insulating medium. Figure 1 and Figure 2 As shown, the parallel switching device 100 may include a switch body, a disconnecting switch 10, a vacuum switch 20, and a linkage mechanism 30.

[0038] In the illustrated embodiment, the switch body can be used to support the disconnector switch 10, the vacuum switch 20, and the linkage mechanism 30. Specifically, it may include a support frame (not shown), a support bracket 41 fixedly arranged within the support frame, and three support columns 42 spaced apart on the support bracket 41 to support the three-phase disconnector switch 10. Considering that the arrangement of each phase disconnector switch 10 and its corresponding support column 42 is generally the same, for clarity and explanation, Figure 1 Only one phase disconnect switch 10 and its corresponding vacuum switch 20 are shown in the diagram.

[0039] The disconnector switch 10 may include a stationary isolating contact 11 and a moving isolating contact 12. Specifically, the stationary isolating contact 11 may be fixedly mounted to a support frame and generally located above the support column 42 of the support frame 41. The moving isolating contact 12 may be designed as a pair of spaced-apart knife switches made of conductive metal, the lower end of which may be pivotally mounted to the support column 42 on the support frame 41 to pivot relative to the stationary isolating contact 11 in response to the closing or opening action of the operating spindle. When the moving isolating contact 12 pivots relative to the stationary isolating contact 11 to... Figure 1 and Figure 2 When in the closed position as shown, the isolating moving contact 12 can hold the isolating stationary contact 11 within it and engage with the isolating stationary contact 11; when the isolating moving contact 12 pivots relative to the isolating stationary contact 11 to... Figure 8 When in the isolation position shown, the isolation stationary contact 11 moves out of the isolation moving contact 12, causing the isolation moving contact 12 to disengage from the isolation stationary contact 11.

[0040] Vacuum switch 20 may include a vacuum stationary contact and a vacuum moving contact (not shown). Specifically, the vacuum stationary contact may be fixed relative to a support frame and electrically connected to an isolating stationary contact 11, so that vacuum switch 20 can be arranged in parallel with isolating switch 10. Exemplarily, the vacuum stationary contact may be housed within the vacuum interrupter chamber 23 of vacuum switch 20 and extend to the end of vacuum interrupter chamber 23 via a stationary conductive rod within vacuum interrupter chamber 23. A first stationary contact connector 51 extending axially along vacuum interrupter chamber 23 may be arranged outside vacuum switch 20, thereby electrically connecting the vacuum stationary contact to the first stationary contact connector 51 via the stationary conductive rod. A second stationary contact connector 52, preferably integrally supported with the first stationary contact connector 51 and extending generally along the extending direction of isolating stationary contact 11, may also be provided outside vacuum switch 20. The second stationary contact connector 52 is electrically connected to isolating stationary contact 11, thereby electrically connecting the vacuum stationary contact to isolating stationary contact 11. In an embodiment not shown, at least one of the first stationary contact connector 51 and the second stationary contact connector 52 can be electrically connected to the main bus, thereby allowing the vacuum switch 20 and the disconnecting switch 10 to be connected to the main bus and their current-carrying capacity controlled. Understandably, the portion of the second stationary contact connector 52 adjacent to the isolating stationary contact 11 is not shown for clarity.

[0041] The vacuum moving contact is also arranged inside the vacuum interrupter 23 and can move relative to the vacuum stationary contact to a closed or open position. Exemplarily, the moving conductive rod 22 of the vacuum switch 10 can be fixedly connected to the vacuum moving contact and extends axially away from the vacuum interrupter 23. The end of the moving conductive rod 22 away from the vacuum interrupter 23 can be linked with the linkage mechanism 30, so that the moving conductive rod 22 can drive the vacuum moving contact to move relative to the vacuum stationary contact to a closed or open position. When the moving conductive rod 22 drives the vacuum moving contact to move relative to the vacuum stationary contact to... Figure 1 and Figure 2 When in the closed position shown, the vacuum moving contact engages with the vacuum stationary contact; when the moving conductive rod 22 drives the vacuum moving contact to move relative to the vacuum stationary contact to... Figure 8 When the interrupted position is shown, the vacuum moving contact and the vacuum stationary contact disengage, thereby quickly extinguishing the arc generated by the vacuum moving contact and the vacuum stationary contact when interrupting the current by utilizing the vacuum environment inside the vacuum interrupter 23.

[0042] The linkage mechanism 30 can be installed on the support frame and arranged between the disconnecting switch 10 and the vacuum switch 20, so that the opening and closing actions of the disconnecting switch 10 can be transmitted to the vacuum switch 20 via the linkage mechanism 30, thereby causing the vacuum switch 20 to open or close. Therefore, the parallel switchgear 100 provided by this invention can be controlled by a single operating mechanism, which not only significantly reduces manufacturing costs but also greatly improves the ease of operation of the parallel switchgear 100 provided by this invention.

[0043] The important thing is to combine Figure 3 and Figure 4 As shown, the linkage mechanism 30 may include a holding member 31 and a driving member 32. The holding member 31 is movably mounted to the support frame and is movable relative to the isolating stationary contact 11, while the driving member 32 is movably mounted to the support frame and can be linked with the moving conductive rod 22 to drive the moving conductive rod 22 to move. When the isolating moving contact 12 is in Figure 8 When the isolation position is shown, the retaining member 31 can be locked with the driving member 32, thereby holding the moving conductive rod 22 in the disconnected position via the driving member 32, and the vacuum switch 20 remains in the disconnected state. When the isolating moving contact 12 moves from... Figure 8 The isolation position shown is moved towards Figure 2 When the circuit is closed, the isolating moving contact 12 gradually approaches the isolating stationary contact 11 until it contacts the isolating stationary contact 11. During this process, the isolating stationary contact 11 does not contact the holding member 31. The holding member 31 always holds the moving conductive rod 22 in the open position via the driving member 32. After the isolating moving contact 12 contacts the isolating stationary contact 11, the isolating moving contact 12 can drive the holding member 31 to move, so that the holding member 31 is unlocked from the driving member 32, allowing the driving member 32 to drive the moving conductive rod 22. Thus, the vacuum moving contact can be driven to the closed position only after the isolating moving contact 12 moves to the closed position.

[0044] In an embodiment not shown, the isolating moving contact 12 may also move the retaining member 31 before contacting the isolating stationary contact 11, thereby allowing the driving member 32 to unlock from the retaining member 31 and drive the moving conductive rod 22 to the closed position after the isolating moving contact 12 contacts the isolating stationary contact 11. In other words, the sequence in which the isolating moving contact 12 contacts the retaining member 31 and the isolating stationary contact 11 only needs to ensure that the vacuum switch 20 closes after the isolating switch 10 is closed.

[0045] Optionally, in the illustrated embodiment, combined with Figure 3 and Figure 4 As shown, the retaining member 31 can be generally designed as an elongated shape, and its opposite ends can be respectively constructed as a pivoting end 311 and a receiving end 312. The pivoting end 311 is rotatably mounted to the support frame, and the receiving end 312, away from the pivoting end 311, can be subjected to force and pivot about the pivoting end 311. The receiving end 312 of the retaining member 31 may be provided with a receiving opening 313 extending from the end side adjacent to the isolating stationary contact 11 toward the pivoting end 311, for example, extending to a position approximately in the middle of the retaining member 31, so as to allow the receiving opening 313 of the retaining member 31 to receive the isolating stationary contact 11 on both sides in the thickness direction of the isolating stationary contact 11 and to be spaced apart from the isolating stationary contact 11.

[0046] Specifically, the spacing of the receiving openings 313 of the retaining member 31 can be designed such that the isolating moving contact 12 can push the receiving end 312 of the retaining member 31. That is, the spacing of the receiving openings 313 of the retaining member 31 can be designed to be greater than the spacing between the two moving knife gates of the isolating moving contact 12 and less than the maximum dimension in the thickness direction of the isolating moving contact 12.

[0047] Optionally, in the illustrated embodiment, combined with Figure 8 As shown, the retaining member 31 can be generally considered to be arranged on the counterclockwise side of the driving member 32. A locking protrusion 314 may be provided on the clockwise side surface of the retaining member 31 adjacent to the driving member 32. Correspondingly, the driving member 32 may be provided with a locking recess 3213 for engaging with the locking protrusion 314 to lock or unlock. Specifically, the end of the locking protrusion 314 away from the retaining member 31 may be a pointed tip, and the angle between the inclined surface of the locking protrusion 314 adjacent to the pivot end 311 and the surface of the pivot end 311 adjacent to the locking protrusion 314 is configured to allow it to extend along the retaining profile 3211 of the driving member 32 in the closed state and be spaced apart from the retaining profile 3211. Figure 2 and Figure 3 As shown.

[0048] When the isolating contact 12 moves to Figure 8 When the isolation position is shown, the locking protrusion 314 of the retaining member 31 can be locked together with the locking recess 3213 of the driving member 32, thereby holding the moving conductive rod 22 in the disconnected position via the driving member 32, and the vacuum switch 20 remains in the disconnected state. When the isolating moving contact 12 moves from... Figure 8 The isolation position shown is moved towards Figure 2 When the circuit is closed as shown, the isolating moving contact 12 gradually approaches the isolating stationary contact 11 until it contacts the isolating stationary contact 11. Only then can the isolating moving contact 12 drive the holding member 31 to pivot around the pivot end 311, so that the locking protrusion 314 of the holding member 31 can unlock the locking recess 3213 of the driving member 32, thereby allowing the driving member 32 to drive the moving conductive rod 22 to the closed position.

[0049] Optionally, in an embodiment not shown, the pivot end 311 of the retaining member 31 may be provided with a retaining reset element, such as a retaining torsion spring, mounted to the support frame. When the isolating moving contact 12 is in contact with... Figure 8 The branch position shown moves towards Figure 2 When the circuit is closed as shown, the isolating moving contact 12 gradually approaches the isolating stationary contact 11 until it contacts the isolating stationary contact 11. After that, the isolating moving contact 12 needs to overcome the force of the retaining reset member to drive the retaining member 31 to pivot around its pivot end 311.

[0050] Optionally, in the illustrated embodiment, combined with Figure 3 andFigure 4 As shown, the driving member 32 may include a driving cam 321 and a driving rod 322. The driving cam 321 is rotatably mounted to the support frame to pivot relative to the support frame by being driven by the isolating moving contact 12. Its outer periphery may include a retaining profile 3211 for cooperating with the retaining member 31 and a driving profile 3212 for cooperating with the driving rod 322. The retaining profile 3211 may be provided with a locking recess 3213. In the illustrated embodiment, the retaining profile 3211 may have a different radius of curvature than the driving profile 3212, but it is understood that in embodiments not shown, the retaining profile may also have the same radius of curvature as the driving profile, as long as the above-described functions are achieved.

[0051] The drive rod 322 can be generally designed to be elongated, with its end away from the drive cam 321 rotatably mounted to the support frame, while its end adjacent to the drive cam 321 can be linked with the drive profile 3212 of the drive cam 321. For example, the end of the drive rod 322 adjacent to the drive cam 321 can be provided with a rolling pin 3221 to roll into the drive profile 3212 of the drive cam 321. A connection opening 3222 can be provided in the generally central region of the drive rod 322, and the end of the movable conductive rod 22 away from the vacuum interrupter 23 extends into the connection opening 3222 and is pinned to the drive rod 322, so that the drive rod 322 and the end of the movable conductive rod 22 away from the vacuum interrupter 23 are movably connected, thereby driving the movable conductive rod 22 to move between the closed position and the open position.

[0052] Furthermore, in the illustrated embodiment, in conjunction with Figure 3 and Figure 4 As shown, the clockwise side of the holding profile 3211 of the drive cam 321 may be provided with an abutment section 3214 extending relative to the holding profile 3211 and the drive profile 3212. When the isolating moving contact 12 moves from... Figure 1 and Figure 2 The indicated closing position is moved towards Figure 8 When in the isolation position shown, the isolation movable contact 12 can abut against the clockwise side of the abutment section 3214, thereby pushing the abutment section 3214 and correspondingly pushing the drive cam 321 to pivot. The drive profile 3212 of the drive cam 321 can then drive the movable conductive rod 22 to move via the drive rod 322.

[0053] Optionally, in the illustrated embodiment, the abutting section 3214 of the drive cam 321 can be configured to abut against the isolating moving contact 12 before the isolating stationary contact 11 is completely disengaged, and to disengage from the isolating moving contact 12 before the isolating moving contact blade moves from the closed position to the isolated position. The drive cam 321 can be pivoted by the isolating moving contact 12 when the abutting section 3214 abuts against the isolating moving contact 12, so that the drive profile 3212 of the drive section can drive the moving conductive rod 22 to the disconnected position via the drive rod 322. Thus, before the disconnecting switch 10 switches from the closed state to the open state, the vacuum switch 20 has already switched from the closed state to the disconnected state, thereby improving the safety and reliability of the parallel switching device 100 provided by the present invention.

[0054] By way of example, in the illustrated embodiment, combined with Figure 3 and Figure 4 As shown, the drive cam 321 can be constructed as two cam plates 321a spaced apart on the pivot axis and fixed to each other, and a cam drive member 321b fixed between the two cam plates 321a and concentrically arranged with the cam plates 321a. By providing the two cam plates 321a to cooperate with the retaining member 31 and the cam drive member 321b between the two cam plates 321a to cooperate with the drive rod 322, the stability of motion transmission can be improved.

[0055] The outer periphery of the cam plate 321a may include a base circle profile 3215 with a smaller radius of curvature and a retaining profile 3211 with a larger radius of curvature. The counterclockwise end of the retaining profile 3211 is recessed to form a locking recess 3213. The outer periphery of the cam plate 321a has an abutment section 3214 on the clockwise side of the retaining profile 3211. The spacing between the abutment sections 3214 of the two cam plates 321a is designed to allow the end of the isolating moving contact 12 to enter into it and abut against the side of the abutment section 3214 of the cam plate 321a facing the abutment section 3214 of the other cam plate 321a, so that the abutment section 3214 can be moved by the friction between the isolating moving contact 12 and the abutment section 3214. The outer periphery of the cam drive member 321b extending continuously from the base circle contour 3215 to the side of the abutment section 3214 adjacent to the base circle contour 3215 can be designed as a drive contour 3212. Specifically, it may include a first curved segment 3212a that is concentric with the base circle contour 3215 and has a radius of curvature slightly larger than the base circle contour 3215, and a side of the first curved segment 3212a that extends radially outward and obliquely from the counterclockwise direction to the side of the abutment section 3214 facing another abutment section 3214. The first curved segment 3212a and the second curved segment 3212b have a smooth transition.

[0056] Optionally, in an embodiment not shown, the cam plate 321a of the drive cam 321 may be provided with a drive reset member, such as a drive torsion spring, mounted to the support frame, when the isolating moving contact 12 moves from... Figure 2 The indicated closing position faces the direction Figure 8 When the isolation position is moved as shown, the isolating moving contact 12 needs to overcome the force of the drive reset member to push the abutment section 3214 of the cam plate 321a. In an embodiment not shown, the parallel switching device 100 may further include an electrical connector, such as an electrical wire, arranged between the moving conductive rod 22 and the abutment section 3214, so that when the isolating moving contact 12 abuts against the abutment section 3214 of the drive cam 321, an electrical connection to the moving conductive rod 22 can be formed via the electrical connector.

[0057] Optionally, in the illustrated embodiment, as Figure 1 and Figure 2 As shown, the parallel switching device 100 may further include a grounding bracket 43 fixedly mounted on the support frame and three grounding contacts 13 fixedly arranged on the grounding bracket 43 and corresponding one-to-one with the three-phase disconnecting switch 10. Considering that the arrangement relationship between each grounding contact 13 and the corresponding phase's isolating moving contact 12 is basically the same, only one grounding contact 13 is shown in the figure for clarity. Specifically, the grounding contact 13 may be arranged on the other side of the isolating moving contact 12 relative to the isolating stationary contact 11, so that the isolating moving contact 12 in the isolating position can move to engage with the isolating stationary contact 11 in response to a closing action or move to engage with the grounding contact 13 in response to a grounding action.

[0058] Now combined Figure 2 as well as Figures 5 to 9 The movement state of the parallel switching device 100 of the present invention is described as moving sequentially from the closed position to the isolation position and the grounding position.

[0059] like Figure 2 As shown, in the parallel switchgear 100, the disconnector 10 is in the closed state and the vacuum switch 20 is in the closed state. The moving contact 12 is engaged with the stationary contact 11 and does not contact the drive cam 321. All current from the power line can be transmitted to the moving contact 12 through the stationary contact 11. Therefore, the disconnector 10 can carry and control the current.

[0060] When a tripping operation is required, the isolating moving contact 12 is subjected to a tripping force and rotates counterclockwise around its connection point with the support column 42 until it abuts against the abutting section 3214 of the drive cam 321. The isolating moving contact 12 is not completely disengaged from the isolating stationary contact 11. Under the force of the retaining reset member, the retaining member 31 rotates slightly clockwise around its connection point with the support frame until the inclined surface of the locking protrusion 314 near the pivot end 311 abuts against the retaining profile 3211 of the drive cam 321. Figure 5 As shown. At this time, the disconnector 10 remains open and the vacuum switch 20 remains closed. A portion of the current can still be transmitted to the disconnector moving contact 12 via the disconnector stationary contact 11, and another portion of the current can be transmitted to the disconnector moving contact 12 via the vacuum stationary contact and the vacuum moving contact. In other words, a portion of the total current from the power line is diverted to the vacuum switch 20.

[0061] Under the opening operation force, the isolating moving contact 12 can continue to rotate counterclockwise until it disengages from the isolating stationary contact 11, and pushes the drive cam 321 around its connection point with the support frame to overcome clockwise rotation, driving the reset member to store energy. Since the radius of curvature of the first segment 3212a of the drive profile 3212 of the drive cam 321 and the radius of curvature of the holding profile 3211 are both constant, the positions of the drive rod 322 and the holding member 31 remain unchanged, and the vacuum switch 20 remains closed. Figure 6 As shown. At this time, all the current is transferred to the vacuum switch 20 and transmitted to the isolation moving contact 12 via the vacuum stationary contact and the vacuum moving contact. That is, the vacuum switch 20 carries and controls the circuit.

[0062] Under the opening operation force, the isolating moving contact 12 can rotate further counterclockwise and push the drive cam 321 to rotate further clockwise. The second curved segment 3212b of the drive profile 3212 of the drive cam 321 pushes the drive rod 322 to rotate clockwise around its connection point with the support frame. The drive rod 322 thus drives the moving conductive rod 22 to the disconnected position. The locking protrusion 314 of the retaining member 31 can fall into the locking recess 3213 of the retaining profile 3211 of the drive cam 321, and the retaining reset member can press the locking protrusion 314 of the retaining member 31 against the locking recess 3213 of the drive cam 321. Figure 7 As shown. At this time, the arc generated by the vacuum moving contact and the vacuum stationary contact when interrupting the current can be quickly extinguished by the vacuum interrupter chamber 23 of the vacuum switch 20.

[0063] The isolating moving contact 12 rotates counterclockwise under the tripping operation force. Figure 8In the isolated position shown, the locking protrusion 314 of the retaining member 31 is locked into the locking recess 3213 of the drive cam 321 under the action of the retaining reset member, thereby holding the drive cam 321 in the open position. At this time, the disconnecting switch 10 is in the open state, and the vacuum switch 20 is in the closed state.

[0064] When a grounding operation is required, the isolating moving contact 12 is subjected to a grounding operation force and then... Figure 8 The isolation position shown is rotated counterclockwise until it engages with grounding contact 13, as shown. Figure 9 As shown. At this time, the disconnecting switch 10 is in the grounded state, and the vacuum switch 20 is in the open state.

[0065] When the circuit is tripped from the grounded position, the operation of the parallel switchgear 100 is the same as described above. Figures 8 to 9 The operation process is the reverse, so it will not be described in detail here.

[0066] When the closing operation is performed from the isolated position, the isolating moving contact 12 is subjected to the closing operation force and moves from the isolated position. Figure 8 The isolation position shown is rotated clockwise without contacting the retaining member 31 until the isolating moving contact 12 contacts the isolating stationary contact 11, and as the engagement deepens, it abuts against the receiving end 312 of the retaining member 31, as shown. Figure 10 As shown. At this time, the connection between component 31 and drive component 32 remains unchanged, and vacuum switch 20 is in the disconnected state.

[0067] Under the closing operation force, the isolating moving contact 12 continues to rotate clockwise and pushes the retaining member 31 to rotate counterclockwise against the force of the retaining reset member. The locking protrusion 314 of the retaining member 31 thus unlocks from the locking recess 3213 of the drive cam 321. Figure 11 As shown. Next, the drive cam 321 can rotate counterclockwise under the action of the drive reset force, and the moving conductive rod 22 can thus move to the closed position under the action of the self-closing force of the vacuum switch 20. The drive rod 322 then rotates counterclockwise to be arranged at a distance relative to the first curved segment 3212a of the drive profile 3212 of the drive cam 321. Thus, the isolating moving contact 12 completes the engagement with the isolating stationary contact 11, and the locking protrusion 314 of the retaining member 31 is arranged at a distance relative to the retaining profile 3211 of the drive cam 321.

[0068] It should be understood that although this specification describes various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0069] The above description is merely an illustrative embodiment of the present invention and is not intended to limit the scope of the invention. Any equivalent changes, modifications, and combinations made by those skilled in the art without departing from the concept and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. A parallel switching device (100), characterized in that, The parallel switching device (100) includes: Disconnecting switch (10) includes a stationary contact (11) and a moving contact (12) that is movable relative to the stationary contact (11) to a closed position and an isolated position, wherein the moving contact (12) engages with the stationary contact (11) in the closed position and disengages from the stationary contact (11) in the isolated position. A vacuum switch (20) includes a vacuum stationary contact electrically connected to the isolating stationary contact (11) and a vacuum moving contact movable relative to the vacuum stationary contact to a closed position and an open position, the vacuum moving contact engaging with the vacuum stationary contact in the closed position and disengaging from the vacuum stationary contact in the open position. The linkage mechanism (30) includes a retaining member (31) movable relative to the isolating stationary contact (11) and a driving member (32) linked with the vacuum moving contact. The retaining member (31) can hold the vacuum moving contact in the open position via the driving member (32) when the isolating moving contact (12) is in the isolating position, and can be driven by the isolating moving contact (12) to move relative to the isolating stationary contact (11) when the isolating moving contact (12) moves toward the closing position, thereby allowing the driving member (32) to drive the vacuum moving contact to the closed position after the isolating moving contact (12) contacts the isolating stationary contact (11).

2. The parallel switching device (100) according to claim 1, characterized in that, The retaining member (31) includes a pivoting end (311) and a receiving end (312) away from the pivoting end (311), the receiving end (312) being provided with a receiving opening (313) therein capable of receiving the isolating stationary contact (11).

3. The parallel switching device (100) according to claim 2, characterized in that, The retaining member (31) is provided with a locking protrusion (314) adjacent to the pivot end (311), and the driving member (32) is provided with a locking recess (3213) for cooperating with the locking protrusion (314). The locking protrusion (314) of the retaining member (31) is locked together with the locking recess (3213) of the driving member (32) when the isolating moving contact (12) is in the isolating position. The receiving end (312) of the retaining member (31) can be pivoted by the isolating moving contact (12) after the isolating moving contact (12) moves toward the closed position to contact the isolating stationary contact (11), so that the locking protrusion (314) of the retaining member (31) is unlocked from the locking recess (3213) of the driving member (32).

4. The parallel switching device (100) according to claim 3, characterized in that, The driving end of the retaining member (31) is provided with a retaining reset member so that after the isolating stationary contact (11) moves toward the closing position to contact the isolating stationary contact (11), it can overcome the force of the retaining reset member and drive the retaining member (31) to pivot around its pivot end (311).

5. The parallel switching device (100) according to claim 3, characterized in that, The driving member (32) includes a driving cam (321) and a driving rod (322) that can be driven by the driving cam (321) and is linked with the vacuum moving contact. The outer periphery of the driving cam (321) includes a retaining profile (3211) for cooperating with the retaining member (31) and a driving profile (3212) for cooperating with the driving rod (322). The retaining profile (3211) is provided with the locking recess (3213).

6. The parallel switching device (100) according to claim 5, characterized in that, The holding profile (3211) of the drive cam (321) has an abutting section (3214) on the side adjacent to the drive profile (3212), wherein the abutting section (3214) is able to abut against the isolating moving contact (12) and be pivoted by the isolating moving contact (12) during the movement of the isolating moving contact (12) from the closed position to the isolating position.

7. The parallel switching device (100) according to claim 6, characterized in that, The abutting section (3214) of the drive cam (321) is configured to abut against the isolating moving contact (12) before the isolating stationary contact (11) is completely disengaged, and to disengage from the isolating moving contact (12) before the isolating moving contact blade moves from the closed position to the isolated position. The drive cam (321) can be pivoted by the isolating moving contact (12) when the abutting section (3214) abuts against the isolating moving contact (12), so that the drive profile (3212) of the drive section can drive the vacuum moving contact to the open position via the drive rod (322).

8. The parallel switching device (100) according to claim 7, characterized in that, The drive cam (321) is also provided with a drive reset member so that when the isolation moving contact (12) abuts against the abutting section (3214), it can overcome the force of the drive reset member and drive the drive cam (321) to pivot.

9. The parallel switching device (100) according to any one of claims 1 to 7, characterized in that, The parallel switching device (100) further includes a grounding contact (13) arranged on the other side of the isolating moving contact (12) relative to the isolating stationary contact (11), so that the isolating moving contact (12) engages with the grounding contact (13) when it moves to the ground position.

10. A gas-insulated switchgear, characterized in that, The gas-insulated switchgear includes a parallel switchgear (100) according to any one of claims 1 to 9.

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