Switching device

Abstract

The utility model belongs to the technical field of power distribution equipment, and discloses a switching device which comprises a circuit breaker, a grounding switch and a back locking mechanism. The circuit breaker comprises a mounting frame and an operating mechanism, wherein the operating mechanism is movably arranged on the mounting frame between a first switching-on position and a first switching-off position; the grounding switch is arranged on the mounting frame; the back locking mechanism is in transmission connection with the grounding switch; when the grounding switch is switched from an opening state to a closing state, the counter locking mechanism is driven to move from an unlocking position to a first locking position; the counter locking mechanism at the first locking position is used for preventing the operation mechanism from moving from the first opening position to the first closing position, and the counter locking mechanism at the unlocking position is used for avoiding the operation mechanism from moving from the first opening position to the first closing position. The switch device can prevent the circuit breaker from being switched from an opening state to a closing state when the grounding switch is in a closing state, thereby preventing grounding short circuit faults, ensuring safe operation of power equipment, and reducing potential safety hazards.

Description

Technical Field

[0001] The utility model relates to the technical field of power distribution equipment, in particular to a switch device. Background Art

[0002] The switchgear installed in the medium and high voltage switchgear for power supply and distribution equipment usually includes circuit breakers, disconnectors, earthing switches and other components. An interlocking mechanism is set between the circuit breaker, disconnector and earthing switch. The interlocking mechanism meets the following requirements: after the circuit breaker is closed, the disconnector and earthing switch cannot be operated. That is, the two conditions of preventing the disconnector from opening and closing with load and preventing the earthing switch from closing with power on in the five-protection interlocking are met.

[0003] If the circuit breaker is to be switched from the energy storage (open) state to the closed state, the operation sequence should be: disconnect the grounding switch, close the isolating switch, and operate the circuit breaker to close. That is, when the circuit breaker is closed, the grounding switch must be in the open state to prevent a ground short circuit fault.

[0004] The switch device installed in the existing medium and high voltage switchgear can still operate the circuit breaker to close when the grounding switch is in the closed state, which makes it easy for operators to mistakenly operate the circuit breaker to close when the grounding switch is in the closed state, causing a ground short circuit fault, affecting the safe operation of the power equipment, and posing a major safety hazard.

[0005] Therefore, there is an urgent need for a switch device to solve the above problems existing in the prior art. Utility Model Content

[0006] The utility model aims to provide a switch device, which can prevent the circuit breaker unit from switching from the open state to the closed state when the grounding switch is in the closed state, prevent the occurrence of ground short circuit faults, ensure the safe operation of power equipment, and reduce safety hazards.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] A switch device is provided, comprising:

[0009] A circuit breaker, comprising a mounting frame and an operating mechanism, wherein the operating mechanism is movably arranged on the mounting frame between a first closing position and a first opening position, wherein the first closing position is the position of the operating mechanism when the circuit breaker is in a closing state, and the first opening position is the position of the operating mechanism when the circuit breaker is in an opening state;

[0010] A grounding switch, arranged on the mounting frame;

[0011] An anti-locking mechanism, drivingly connected to the grounding switch and movably connected to the mounting frame;

[0012] When the grounding switch switches from the open state to the closed state, the anti-locking mechanism is driven to move from the unlocked position to the first locked position; the anti-locking mechanism in the first locked position is used to block the operating mechanism from moving from the first open position to the first closed position, and the anti-locking mechanism in the unlocked position is used to prevent the operating mechanism from moving from the first open position to the first closed position.

[0013] As an optional solution of the switch device provided by the utility model, the switch device also includes:

[0014] A grounding switch main shaft is movably arranged on the mounting frame and connected to the grounding switch, and the grounding switch main shaft is used to drive the grounding switch to switch back and forth between a second closing position and a second opening position to realize opening and closing of the grounding switch;

[0015] An isolating switch, arranged on the mounting frame;

[0016] A main shaft of an isolating switch, movably arranged on the mounting frame and connected to the isolating switch, the main shaft of the isolating switch is used to drive the isolating switch to switch back and forth between a third closing position and a third opening position, so as to realize opening and closing of the isolating switch;

[0017] a linkage mechanism, which is in driving connection with both the main shaft of the grounding switch and the main shaft of the isolating switch; when the grounding switch is switched from the second open position to the second closed position, the isolating switch is switched from the third closed position to the third open position;

[0018] The anti-locking mechanism is drivingly connected to the grounding switch main shaft or the isolating switch main shaft to move between the first locking position and the unlocking position.

[0019] As an optional solution of the switch device provided by the utility model, the main shaft of the grounding switch and the main shaft of the isolating switch are both rotatably arranged on the mounting frame; the anti-locking mechanism includes:

[0020] A cam assembly, arranged on the main shaft of the grounding switch or the main shaft of the isolating switch;

[0021] The locking rod is slidably matched with the cam profile of the cam assembly, and the locking rod is driven by the cam assembly to reciprocate between the first locking position and the unlocking position.

[0022] As an optional solution of the switch device provided by the utility model, the mounting frame is connected with:

[0023] A guide member is provided with a guide portion, and the locking rod and the guide portion can be slidably matched along the moving direction of the locking rod.

[0024] As an optional solution of the switch device provided by the utility model, the anti-locking mechanism further includes a first elastic member, a first stop pin and a second stop pin;

[0025] The locking rod is provided with a first through hole for inserting a first stop pin and a second through hole for inserting a second stop pin in a radial direction, the first through hole is provided with one or a plurality of the first through holes are provided at intervals along the axial direction of the locking rod, and the second through hole is provided with one or a plurality of the second through holes are provided at intervals along the axial direction of the locking rod;

[0026] The guide member comprises a guide plate, the guide portion is a guide hole provided on the guide plate, and the locking rod is inserted into the guide hole;

[0027] The first elastic member is sleeved on the locking rod and compressed between the first stop pin and the guide plate. The second stop pin is located on a side of the guide plate facing away from the first stop pin.

[0028] As an optional solution of the switch device provided by the utility model, the cam assembly includes:

[0029] A first clamp;

[0030] A second clamp, detachably fastened to the first clamp to clamp the grounding switch main shaft or the isolating switch main shaft;

[0031] A cam plate is arranged on one of the first clamp and the second clamp, and the cam plate is slidably matched with the locking rod.

[0032] As an optional solution of the switch device provided by the utility model, the operating mechanism includes:

[0033] A closing operation shaft is rotatably arranged on the mounting frame;

[0034] A reverse locking fitting, comprising a connecting portion and a matching portion connected to each other, wherein the connecting portion is connected to the closing operation shaft so as to drive the matching portion to rotate between the first opening position and the first closing position under the driving of the closing operation shaft, and the matching portion is arranged opposite to the locking rod;

[0035] The locking rod moves closer to or farther away from the matching portion to block or prevent the matching portion from rotating from the first opening position to the first closing position.

[0036] As an optional solution of the switch device provided by the utility model, the linkage mechanism includes a first transmission arm, a second transmission arm and a pull rod;

[0037] The first transmission arm is connected to the main shaft of the grounding switch and has a movable state relative to the main shaft of the grounding switch and a fixed state relative to the main shaft of the grounding switch; the second transmission arm is connected to the main shaft of the disconnector; one end of the pull rod is movably connected to the first transmission arm, and the other end is movably connected to the second transmission arm; the first transmission arm, the second transmission arm, the pull rod and the mounting frame constitute a four-bar linkage;

[0038] The isolating switch has a fourth opening position, and the fourth opening position is located between the third closing position and the third opening position;

[0039] When the isolating switch moves from the third closing position to the fourth opening position, the first transmission arm moves relative to the grounding switch main shaft; when the isolating switch moves from the fourth opening position to the third opening position, the first transmission arm is fixed relative to the grounding switch main shaft to drive the grounding switch to switch from the second opening position to the second closing position through the grounding switch main shaft.

[0040] As an optional solution of the switch device provided by the utility model, the main shaft of the grounding switch is rotatably connected to the mounting frame, and the first transmission arm includes:

[0041] A first sleeve portion is coaxially sleeved on the main shaft of the grounding switch, a waist-shaped hole is circumferentially arranged on the first sleeve portion, and the linkage mechanism further includes a first pin shaft, which is passed through the waist-shaped hole and the main shaft of the grounding switch and is slidably matched with the waist-shaped hole;

[0042] The first connecting arm has one end fixedly connected to the first sleeve portion and the other end rotatably connected to the pull rod.

[0043] As an optional solution of the switch device provided by the utility model, two waist-shaped holes are arranged on the first sleeve part, and the two waist-shaped holes are arranged opposite to each other along the diameter direction of the first sleeve part, and the first pin shaft passes through the two waist-shaped holes and the main shaft of the grounding switch.

[0044] As an optional solution of the switch device provided by the utility model, the anti-locking mechanism has a second locking position, and the second locking position is located between the first locking position and the unlocking position;

[0045] When the isolating switch moves from the third closing position to the fourth opening position, the anti-locking mechanism moves from the unlocking position to the second locking position, and the anti-locking mechanism at the second locking position is used to prevent the operating mechanism from moving from the first opening position to the first closing position.

[0046] Beneficial effects of the utility model:

[0047] The utility model provides a switch device, comprising a circuit breaker, a grounding switch, and a reverse locking mechanism. The operating mechanism of the circuit breaker can move between a first opening position and a first closing position to realize the opening and closing of the circuit breaker. By setting the reverse locking mechanism, when the grounding switch is in the opening state, the reverse locking mechanism is in the unlocking position, at which time the reverse locking mechanism has no blocking effect on the operating mechanism. In the process of the operating mechanism moving from the first opening position to the first closing position, the reverse locking mechanism is in a state of avoiding the operating mechanism to realize the smooth closing of the circuit breaker, which complies with the operation sequence of "first disconnecting the grounding switch before closing the circuit breaker". When the grounding switch is switched from the opening state to the closing state, the grounding switch drives the reverse locking mechanism to move synchronously, so that the reverse locking mechanism moves from the unlocking position to the first locking position. The reverse locking mechanism in the first locking position can block the operating mechanism from moving from the first opening position to the first closing position, thereby blocking the smooth closing of the circuit breaker. At this time, even if the operating mechanism is driven to act, the circuit breaker cannot be closed, and the circuit breaker closing operation is avoided when the grounding switch is in the closing state. That is, when the grounding switch is in the closed state, it locks the operating mechanism through the anti-locking mechanism to prevent the operator from mistakenly closing the circuit breaker and causing a ground short circuit fault, thereby ensuring the safe operation of the power equipment and reducing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments of the utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0049] Figure 1 This is a first view of the switch device provided by the specific embodiment of the utility model;

[0050] Figure 2 is a second view of the switch device provided in a specific embodiment of the utility model;

[0051] Figure 3 It is a third view of the switch device provided in the specific embodiment of the utility model;

[0052] Figure 4 yes Figure 1 A partial enlarged view of the middle A;

[0053] Figure 5 yes Figure 2 A partial view of

[0054] Figure 6 It is a structural schematic diagram of a closing operation shaft and an anti-locking matching piece provided by a specific embodiment of the utility model;

[0055] Figure 7 It is a structural schematic diagram of a guide member of an anti-locking mechanism provided in a specific embodiment of the utility model;

[0056] Figure 8 It is a structural schematic diagram of a locking rod of an anti-locking mechanism provided in a specific embodiment of the utility model;

[0057] Fig. 9 It is a structural schematic diagram of a cam assembly of an anti-locking mechanism provided in a specific embodiment of the utility model;

[0058] Fig.10 It is a structural schematic diagram of a first transmission arm provided in a specific embodiment of the utility model;

[0059] Fig.11 yes Figure 3 A partial enlarged view of point C in the middle;

[0060] Fig.12 It is a schematic diagram of a switch device in a first state provided by a specific embodiment of the utility model (the grounding switch is open and the isolating switch is closed);

[0061] Fig.13 yes Fig.12 A partial enlarged view of point B in the middle;

[0062] Fig.14 yes Fig.12 A partial view of

[0063] Fig.15 It is a schematic diagram of a switch device in a second state provided by a specific embodiment of the utility model (the grounding switch is open, and the isolating switch is open);

[0064] Fig.16 yes Fig.15 A partial view of

[0065] Fig.17 It is a schematic diagram of a switch device in a third state provided by a specific embodiment of the utility model (the grounding switch is closed and the isolating switch is open);

[0066] Fig.18 yes Fig.17 A partial view of the .

[0067] In the figure:

[0068] 1. Circuit breaker; 2. Earthing switch; 3. Anti-locking mechanism; 4. Earthing switch main shaft; 5. Disconnector; 6. Disconnector main shaft; 7. Linkage mechanism;

[0069] 11. Installation frame; 12. Operating mechanism; 13. Closing spring;

[0070] 121. Closing operation shaft; 122. Anti-lock fitting;

[0071] 1221, connecting portion; 1222, matching portion; 1220, linkage clamping hole;

[0072] 21. Grounding switch; 22. Grounding static contact;

[0073] 31. cam assembly; 32. locking rod; 33. guide member; 34. first elastic member; 35. first stop pin; 36. second stop pin; 37. locking nut; 38. first fastener;

[0074] 311, first clamp; 312, second clamp; 313, cam plate; 314, second fastener;

[0075] 321, first perforation; 322, second perforation;

[0076] 331, guide plate; 332, connecting plate; 3321, strip hole;

[0077] 3311, guide hole;

[0078] 51. Isolation knife switch; 52. Isolation static contact; 53. Isolation pillar; 54. Crank arm; 55. Transmission column;

[0079] 71, first transmission arm; 72, second transmission arm; 73, pull rod; 74, first pin shaft; 75, second pin shaft; 76, third transmission arm; 77, second elastic member; 78, fourth transmission arm; 79, third elastic member; 710, stop member;

[0080] 711, first sleeve portion; 712, first connecting arm; 7111, waist-shaped hole;

[0081] 721, second sleeve portion; 722, second connecting arm;

[0082] 731, a first rod body; 732, a second rod body. DETAILED DESCRIPTION

[0083] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0084] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0085] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0086] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0087] In this embodiment, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present utility model generally indicates that the associated objects before and after are in an "or" relationship.

[0088] In the embodiments of the present invention, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments.

[0089] like Figure 1 and Figure 2 As shown, this embodiment provides a switch device, including a circuit breaker 1, a grounding switch 2, and an anti-locking mechanism 3.

[0090] The circuit breaker 1 includes a mounting frame 11 and an operating mechanism 12. The operating mechanism 12 is movably arranged on the mounting frame 11 between a first closing position and a first opening position. The first closing position is the position of the operating mechanism 12 when the circuit breaker 1 is in a closed state, and the first opening position is the position of the operating mechanism 12 when the circuit breaker 1 is in an open state. The operating mechanism 12 of the circuit breaker 1 can move between the first opening position and the first closing position to realize the opening and closing of the circuit breaker 1.

[0091] The grounding switch 2 is arranged on the mounting frame 11, and has a closed state and an open state. The anti-locking mechanism 3 is connected to the grounding switch 2 in a transmission manner, and is movably connected to the mounting frame 11; when the grounding switch 2 is switched from the open state to the closed state, the anti-locking mechanism 3 is driven to move from the unlocked position to the first locked position; the anti-locking mechanism 3 in the first locked position is used to block the operating mechanism 12 from moving from the first open position to the first closed position, and the anti-locking mechanism 3 in the unlocked position is used to prevent the operating mechanism 12 from moving from the first open position to the first closed position.

[0092] In the switch device provided in the present embodiment, by setting the anti-locking mechanism 3, when the grounding switch 2 is in the open state, the anti-locking mechanism 3 is in the unlocked position, at which time the anti-locking mechanism 3 has no blocking effect on the operating mechanism 12. In the process of the operating mechanism 12 moving from the first open position to the first closed position, the anti-locking mechanism 3 is in the state of avoiding the operating mechanism 12, so as to realize the smooth closing of the circuit breaker 1, which complies with the operation sequence of "first disconnecting the grounding switch 2 before closing the circuit breaker 1". When the grounding switch 2 is switched from the open state to the closed state, the grounding switch 2 drives the anti-locking mechanism 3 to move synchronously, so that the anti-locking mechanism 3 moves from the unlocked position to the first locked position. The anti-locking mechanism 3 in the first locked position can block the operating mechanism 12 from moving from the first open position to the first closed position, thereby blocking the smooth closing of the circuit breaker 1. At this time, even if the operating mechanism 12 is driven to act, the circuit breaker 1 cannot be closed, so as to avoid operating the circuit breaker 1 to close when the grounding switch 2 is in the closed state. That is, when the grounding switch 2 is in the closed state, it locks the operating mechanism 12 through the anti-locking mechanism 3 to prevent the operator from mistakenly closing the circuit breaker 1 and causing a ground short circuit fault, thereby ensuring the safe operation of the power equipment and reducing safety hazards.

[0093] See also Figure 1 , Figure 2 as well as Figure 3 In this embodiment, the switch device further includes a grounding switch main shaft 4, an isolating switch 5, an isolating switch main shaft 6 and a linkage mechanism 7.

[0094] The grounding switch main shaft 4 is movably arranged on the mounting frame 11 and is in driving connection with the grounding switch 2. The grounding switch main shaft 4 is used to drive the grounding switch 2 to switch back and forth between the second closing position and the second opening position to realize the closing and opening of the grounding switch 2. The second closing position is the position of the grounding switch 2 when it is in the closing state, such as Figure 2 The second opening position is the position of the grounding switch 2 when it is in the opening state, as shown in FIG. Figure 1 shown.

[0095] The isolating switch 5 is arranged on the mounting frame 11, and has a closed state and an open state. The isolating switch main shaft 6 is movably arranged on the mounting frame 11, and is in transmission connection with the isolating switch 5. The isolating switch main shaft 6 is used to drive the isolating switch 5 to switch back and forth between the third closed position and the third open position, so as to realize the opening and closing of the isolating switch 5. Among them, the third closed position is the position of the isolating switch 5 when it is in the closed state, and the third open position is the position of the isolating switch 5 when it is in the fully open state.

[0096] The linkage mechanism 7 is in transmission connection with both the grounding switch main shaft 4 and the isolating switch main shaft 6. When one of the grounding switch main shaft 4 and the isolating switch main shaft 6 moves relative to the mounting frame 11, the linkage mechanism 7 can drive the other to move. Specifically, Figure 1 As shown, the grounding switch 2 is in the second open position, and the isolating switch 5 is in the third closed position. Figure 2 When the grounding switch 2 is switched from the second opening position to the second closing position, the isolating switch 5 is switched from the third closing position to the third opening position.

[0097] In some embodiments, the anti-locking mechanism 3 can be connected to the isolating switch main shaft 6. At this time, when the isolating switch main shaft 6 is operated, the anti-locking mechanism 3 can be driven to move between the first locking position and the unlocking position; when the grounding switch main shaft 4 is operated, the grounding switch main shaft 4 drives the isolating switch main shaft 6 to move through the linkage mechanism 7, so that the isolating switch main shaft 6 drives the anti-locking mechanism 3 to move between the first locking position and the unlocking position, so that when the grounding switch 2 is in the closed state, the anti-locking mechanism 3 locks the operating mechanism 12 of the circuit breaker 1, and when the grounding switch 2 is in the open state and the isolating switch 5 is in the closed state, the anti-locking mechanism 3 unlocks the operating mechanism 12 of the circuit breaker 1.

[0098] In an actual switch device, the isolating switch main shaft 6 is usually located above the grounding switch main shaft 4, and the anti-locking mechanism 3 and the operating mechanism 12 are both arranged at the height position of the isolating switch main shaft 6, which is more convenient for operators to operate.

[0099] In other embodiments, the anti-locking mechanism 3 may also be transmission-connected to the grounding switch main shaft 4 , so that the anti-locking mechanism 3 moves between the first locking position and the unlocking position under the drive of the grounding switch main shaft 4 .

[0100] Optionally, the grounding switch main shaft 4 and the isolating switch main shaft 6 are both rotatably arranged on the mounting frame 11, and when one of the grounding switch main shaft 4 and the isolating switch main shaft 6 rotates, it drives the other to rotate through the linkage mechanism 7. In other embodiments, the grounding switch main shaft 4 and the isolating switch main shaft 6 may also be connected to the mounting frame 11 in other types of movable connections, such as relative sliding, translation, etc.

[0101] See also Figure 1 , Figure 2 as well as Figure 3 The grounding switch 2 includes a grounding knife switch 21 and a grounding static contact 22. The grounding knife switch 21 is connected to the grounding switch main shaft 4 and can rotate under the drive of the grounding switch main shaft 4. The grounding static contact 22 is installed on the mounting frame 11 through a support. The grounding knife switch 21 can contact and separate with the grounding static contact 22 when rotating, so as to realize the closing and opening of the grounding switch 2. Figure 3 As shown, the grounding switch 21 is in the second opening position. Usually, a plurality of grounding switches 21 are provided, and the plurality of grounding switches 21 are in contact with or separated from the plurality of grounding static contacts 22 correspondingly, for example, three grounding switches 21 are provided.

[0102] See also Figure 1 , Figure 2 as well as Figure 3 The isolating switch 5 includes an isolating knife gate 51, an isolating static contact 52, an isolating pillar 53, a crank arm 54 and a transmission pillar 55. The isolating pillar 53 is supported on the mounting frame 11, and the isolating knife gate 51 is rotatably arranged on one isolating pillar 53, and is detachably contacted with the isolating static contact 52 arranged on another isolating pillar 53, so as to realize the opening and closing of the isolating switch 5. A crank arm 54 is arranged on the isolating switch main shaft 6, and one end of the transmission pillar 55 is rotatably connected with the crank arm 54, and the other end is movably connected with the isolating knife gate 51. When the isolating switch main shaft 6 rotates, the crank arm 54 rotates coaxially with the isolating switch main shaft 6, and the crank arm 54 drives the isolating knife gate 51 to rotate through the transmission pillar 55, so that the isolating knife gate 51 is in contact with or separated from the isolating static contact 52. Usually, a plurality of isolating knife gates 51, the transmission pillar 55 and the crank arm 54 are arranged one by one, and the plurality of isolating knife gates 51 are in contact with and separated from the plurality of isolating static contacts 52.

[0103] like Figure 1 and Figure 4As shown, the anti-locking mechanism 3 includes a cam assembly 31 and a locking rod 32. In this embodiment, the cam assembly 31 is arranged on the isolating switch main shaft 6 and rotates coaxially with the isolating switch main shaft 6. The locking rod 32 is slidably matched with the cam profile of the cam assembly 31, and the locking rod 32 reciprocates between the first locking position and the unlocking position driven by the cam assembly 31. Specifically in this embodiment, the grounding switch main shaft 4 and the isolating switch main shaft 6 are both extended horizontally, and the locking rod 32 moves up and down in the process of sliding with the cam profile of the cam assembly 31 to achieve unlocking and locking of the operating mechanism 12. Through the sliding cooperation between the cam assembly 31 and the locking rod 32, the position switching of the locking rod 32 is achieved, and the structure is simple and easy to arrange.

[0104] Of course, in some other embodiments, the cam assembly 31 may also be disposed on the grounding switch main shaft 4 . In this case, the anti-locking mechanism 3 and the operating mechanism 12 are installed at a lower position to match the position of the grounding switch main shaft 4 .

[0105] In this embodiment, see Figure 1 , Figure 4 , Figure 5 as well as Figure 6 The operating mechanism 12 includes a closing operation shaft 121, a reverse locking fitting 122 and a closing spring 13. The closing operation shaft 121 is rotatably arranged on the mounting frame 11. The reverse locking fitting 122 includes a connecting portion 1221 and a fitting portion 1222 connected to each other. The connecting portion 1221 is connected to the closing operation shaft 121 to drive the fitting portion 1222 to rotate between the first opening position and the first closing position under the drive of the closing operation shaft 121. The closing spring 13 is arranged on the mounting frame 11. There is a linkage effect between the closing operation shaft 121 and the closing spring 13. When the closing operation shaft 121 rotates to the first opening position, the closing spring 13 is in a compressed energy storage state. When the closing operation shaft 121 switches from the first opening position to the first closing position, the closing spring 13 releases elastic potential energy to quickly close the circuit breaker 1. The specific operating principle of the operating mechanism 12 of the circuit breaker 1 is the prior art and will not be repeated here.

[0106] The matching portion 1222 is arranged opposite to the locking rod 32. When the locking rod 32 moves under the push of the cam assembly 31, the locking rod 32 approaches or moves away from the matching portion 1222 to block or avoid the matching portion 1222 from rotating from the first opening position to the first closing position. Specifically, when the grounding switch main shaft 4 drives the grounding knife 21 to gradually switch from the second opening position to the second closing position, the cam assembly 31 pushes the locking rod 32 to move up to approach the matching portion 1222 of the anti-lock matching piece 122. When the grounding knife 21 rotates to the second closing position, the locking rod 32 moves to the first locking position, which can block the matching portion 1222 from rotating to the first closing position, so that when the grounding switch 2 is closed, the anti-locking operating mechanism 12 is realized to prevent the circuit breaker 1 from being closed by mistake.

[0107] Further, see Figure 6 The connecting portion 1221 of the reverse locking fitting 122 includes a first plate and a second plate. The matching portion 1222 is bent and connected to one side of the first plate, and the second plate is bent and connected to the other side of the first plate, so that the entire reverse locking fitting 122 has a high strength. A linkage card hole 1220 is provided through the first plate and the second plate, and one end of the closing operation shaft 121 is inserted into the linkage card hole 1220, so that the closing operation shaft 121 drives the connecting portion 1221 to rotate. The linkage card hole 1220 and the end of the closing operation shaft 121 inserted into the linkage card hole 1220 are both non-circular, and the shapes and sizes of the two are adapted.

[0108] Optionally, a guide member 33 is provided on the mounting frame 11. A guide portion is provided on the guide member 33, and the locking rod 32 and the guide portion can be slidably matched along the moving direction of the locking rod 32 to improve the accuracy and stability of the locking rod 32 when moving between the first locking position and the unlocking position to avoid displacement.

[0109] Specifically, combined Figure 7 The guide member 33 includes a connecting plate 332 and two guide plates 331 disposed at both ends of the connecting plate 332. The connecting plate 332 and the two guide plates 331 are bent and connected to form a U-shaped plate. The connecting plate 332 is fixedly connected to the mounting frame 11 by a first fastener 38. The two guide plates 331 are arranged at intervals in the upper and lower parts. The guide part is a guide hole 3311 opened on the guide plate 331. The locking rod 32 is penetrated in the guide hole 3311 and can slide in the guide hole 3311 to guide the locking rod 32.

[0110] Illustratively, the first fastener 38 is a bolt or a screw.

[0111] Further, see Figure 7The connecting plate 332 is provided with a strip hole 3321, through which the first fastener 38 passes and is connected and fixed with the connecting hole provided on the mounting frame 11. The arrangement of the strip hole 3321 facilitates the alignment with the connecting hole on the mounting frame 11, improves the assembly error tolerance, and facilitates the first fastener 38 to smoothly pass through the strip hole 3321 and the connecting hole. Moreover, the strip hole 3321 is arranged vertically, so that the vertical installation position of the guide member 33 can be fine-tuned, and the flexibility is stronger.

[0112] See also Figure 4 and Figure 8 The anti-locking mechanism 3 further includes a first elastic member 34, a first stop pin 35 and a second stop pin 36. The locking rod 32 is provided with a first through hole 321 for inserting the first stop pin 35 and a second through hole 322 for inserting the second stop pin 36 in the radial direction. The first through hole 321 is provided with one or multiple through holes are provided along the axial direction of the locking rod 32, and the second through hole 322 is provided with one or multiple through holes are provided along the axial direction of the locking rod 32. The first elastic member 34 is sleeved on the locking rod 32 and compressed between the first stop pin 35 and the guide plate 331 located above. The second stop pin 36 is located on the side of the guide plate 331 facing away from the first stop pin 35. Since the first elastic member 34 is compressed between the first stop pin 35 and the pressure plate, and the second stop pin 36 is stopped on the side of the guide plate 331 facing away from the first stop pin 35, the locking rod 32 can be stabilized in the unlocking position under the elastic force of the first elastic member 34. When the locking rod 32 moves upward under the push of the cam assembly 31, the first elastic member 34 is further compressed, and the second stop pin 36 moves away from the guide plate 331. When the locking rod 32 moves downward from the first locking position to the unlocking position, the first elastic member 34 releases elastic potential energy, and the locking rod 32 quickly returns to the unlocking position under the action of the elastic force of the first elastic member 34 and its own gravity.

[0113] For example, in this embodiment, there is one first through hole 321 and three second through holes 322. The second stopper 36 can be inserted into any second through hole 322 according to design requirements to adjust the compression degree of the first elastic member 34 to an appropriate level. The first elastic member 34 can be a spring.

[0114] See also Figure 4 and Fig. 9The cam assembly 31 includes a first clamp 311, a second clamp 312 and a cam disc 313. The second clamp 312 is detachably fastened with the first clamp 311 to be clamped on the grounding switch main shaft 4 or the disconnector main shaft 6. Specifically in this embodiment, the second clamp 312 is fastened and clamped on the disconnector main shaft 6 by the second fastener 314 after being fastened with the first clamp 311. The cam disc 313 is arranged on one of the first clamp 311 and the second clamp 312, and a cam profile is arranged on the cam disc 313. The cam profile of the cam disc 313 can be slidably matched with the locking rod 32 to push the locking rod 32 to move between the first locking position and the unlocking position.

[0115] The cam assembly 31 is configured as a detachable structure, so that it can be assembled on the isolating switch main shaft 6, and the installation is convenient. Moreover, the cam disc 313 is integrally arranged on one of the first clamp 311 or the second clamp 312. During installation, the cam disc 313 does not need to be connected to the first clamp 311 or the second clamp 312, and only the first clamp 311 and the second clamp 312 need to be fixed by two second fasteners 314.

[0116] See also Figure 4 The lower end of the locking rod 32 is provided with an external thread, and one or more locking nuts 37 are threadedly sleeved thereon. When the cam plate 313 pushes the locking rod 32, the cam profile contacts the locking nut 37 at the bottom. The provision of the locking nut 37 can increase the contact area at the bottom of the locking rod 32, increase the assembly error tolerance, and enable the cam plate 313 to smoothly push the locking rod 32.

[0117] See also Figure 3 The linkage mechanism 7 includes a first transmission arm 71, a second transmission arm 72 and a pull rod 73. The first transmission arm 71 is connected to the grounding switch main shaft 4, and has a movable state relative to the grounding switch main shaft 4 and a fixed state relative to the grounding switch main shaft 4. When the first transmission arm 71 moves relative to the grounding switch main shaft 4, the two cannot drive each other to move. When the first transmission arm 71 is fixed relative to the grounding switch main shaft 4, the two can drive each other to move together. The second transmission arm 72 is connected to the isolating switch main shaft 6. One end of the pull rod 73 is movably connected to the first transmission arm 71, and the other end is movably connected to the second transmission arm 72; the first transmission arm 71, the second transmission arm 72, the pull rod 73 and the mounting frame 11 constitute a four-bar linkage. When the grounding switch main shaft 4 is operated to move, the isolating switch main shaft 6 can be driven to move through the four-bar linkage; when the isolating switch main shaft 6 is operated to move, the grounding switch main shaft 4 can be driven to move through the four-bar linkage.

[0118] Specifically in this embodiment, the grounding switch main shaft 4 and the isolating switch main shaft 6 are both rotatably mounted on the mounting frame 11, one end of the pull rod 73 is rotatably connected to the first transmission arm 71, and the other end of the pull rod 73 is rotatably connected to the second transmission arm 72. The first transmission arm 71 is in a state of rotating relative to the grounding switch main shaft 4.

[0119] The isolating knife switch 51 of the isolating switch 5 has a fourth opening position, which is located between the third closing position and the third opening position. The isolating knife switch 51 of the isolating switch 5 passes through the fourth opening position during the process of rotating from the third closing position to the third closing position. The isolating knife switch 51 in the fourth opening position is in a state of not being completely opened.

[0120] When the isolating knife switch 51 of the isolating switch 5 moves from the third closing position to the fourth opening position driven by the isolating switch main shaft 6, the first transmission arm 71 moves relative to the grounding switch main shaft 4. During this process, the isolating switch main shaft 6 drives the pull rod 73 to rotate through the second transmission arm 72, and the pull rod 73 drives the first transmission arm 71 to rotate relative to the grounding switch main shaft 4. In this stage, the grounding switch main shaft 4 will not be driven by the first transmission arm 71 to rotate, and the grounding knife switch 21 is always in the second opening position. When the isolating knife switch 51 of the isolating switch 5 moves from the fourth opening position to the third opening position driven by the isolating switch main shaft 6, the first transmission arm 71 is fixed relative to the grounding switch main shaft 4. During this process, the isolating switch main shaft 6 drives the pull rod 73 to rotate through the second transmission arm 72, and the pull rod 73 drives the grounding switch main shaft 4 to rotate through the first transmission arm 71, and then the grounding knife switch 21 is switched from the second opening position to the second closing position driven by the grounding switch main shaft 4.

[0121] That is to say, when the isolating knife switch 51 of the isolating switch 5 is switched from the third closing position to the fourth opening position, the linkage mechanism 7 is in the idle stroke stage, during which the first transmission arm 71 of the linkage mechanism 7 rotates relative to the grounding switch main shaft 4, and will not drive the grounding switch main shaft 4 to drive the grounding knife switch 21 to rotate, thereby improving the safety of the grounding switch 2 and the isolating switch 5 and ensuring the personal safety of the operator. When the isolating knife switch 51 of the isolating switch 5 rotates from the fourth opening position to the third opening position to completely open, the linkage mechanism 7 is in the working stroke stage, during which the first transmission arm 71 of the linkage mechanism 7 drives the grounding switch main shaft 4 to rotate, driving the grounding knife switch 21 to close.

[0122] Specifically, see Fig.10 , Fig.12 and Fig.13The first transmission arm 71 includes a first sleeve portion 711 and a first connecting arm 712. The first sleeve portion 711 is coaxially sleeved on the grounding switch main shaft 4, and a waist-shaped hole 7111 is circumferentially arranged on the first sleeve portion 711. The linkage mechanism 7 also includes a first pin shaft 74, which is inserted through the waist-shaped hole 7111 and the grounding switch main shaft 4 and slidably cooperates with the waist-shaped hole 7111. One end of the first connecting arm 712 is fixedly connected to the outer wall of the first sleeve portion 711, and the other end is rotatably connected to the pull rod 73. Fig.13 In the state shown, the first pin shaft 74 abuts against the inner wall of one end of the waist-shaped hole 7111. When the first transmission arm 71 rotates clockwise, the grounding switch main shaft 4 can be driven to rotate via the first pin shaft 74. When the first transmission arm 71 rotates counterclockwise, it moves relative to the grounding switch main shaft 4 and cannot drive the grounding switch main shaft 4 to rotate. When the first pin shaft 74 does not abut against the inner wall of one end of the waist-shaped hole 7111, the first transmission arm 71 cannot drive the grounding switch main shaft 4 to rotate.

[0123] See also Fig.10 and Fig.13 The first sleeve portion 711 is provided with two waist-shaped holes 7111, and the two waist-shaped holes 7111 are arranged opposite to each other along the diameter direction of the first sleeve portion 711, and the first pin shaft 74 passes through the two waist-shaped holes 7111 and the grounding switch main shaft 4. The arrangement of the two waist-shaped holes 7111 can improve the force balance between the first transmission arm 71 and the first pin shaft 74, and can ensure the stability of the first transmission arm 71 when rotating relative to the grounding switch main shaft 4, and can also improve the connection stability between the first transmission arm 71 and the grounding switch main shaft 4.

[0124] See also Fig.11 The second transmission arm 72 includes a second sleeve portion 721 and a second connecting arm 722. The second sleeve portion 721 is sleeved on the isolating switch main shaft 6. The linkage mechanism 7 also includes a second pin 75. The second pin 75 penetrates the second sleeve portion 721 and the isolating switch main shaft 6 to fix the second transmission arm 72 and the isolating switch main shaft 6 so that the two can drive each other to move. The second connecting arm 722 is connected to the outer wall of the second sleeve portion 721 and is rotatably connected to the pull rod 73.

[0125] See also Figure 3The linkage mechanism 7 further includes a third transmission arm 76, a second elastic member 77, a fourth transmission arm 78, and a third elastic member 79. The third transmission arm 76 is sleeved and connected to the grounding switch main shaft 4, and can rotate under the drive of the grounding switch main shaft 4. One end of the second elastic member 77 is connected to the mounting frame 11, and the other end is connected to the third transmission arm 76. When the grounding switch main shaft 4 rotates to close the grounding knife 21, elastic potential energy can be accumulated. The fourth transmission arm 78 is sleeved and connected to the isolating switch main shaft 6, and can rotate under the drive of the isolating switch main shaft 6. One end of the third elastic member 79 is connected to the mounting frame 11, and the other end is connected to the fourth transmission arm 78. When the isolating switch main shaft 6 rotates to open the isolating knife 51, elastic potential energy can be accumulated. Under the elastic force of the second elastic member 77 and the third elastic member 79, the isolating switch 51 can be driven to quickly return to the third closing position, and the grounding switch 21 can quickly return to the second opening position. Under the action of the second elastic member 77 and the third elastic member 79, the isolating switch 51 can be maintained in the third closing position, and the grounding switch 21 can be maintained in the second opening position.

[0126] The second elastic member 77 and the third elastic member 79 may be selected as over-center springs, one end of which is rotatably connected to the mounting frame 11 , and the other end of which is rotatably connected to the corresponding third transmission arm 76 or fourth transmission arm 78 .

[0127] See also Fig.11 The linkage mechanism 7 further includes a stopper 710. The stopper 710 is connected to the mounting frame 11 and is located on one side of the fourth transmission arm 78, and can limit the rotation position of the fourth transmission arm 78, thereby keeping the entire linkage mechanism 7 at a preset position after movement.

[0128] See also Figure 3 The pull rod 73 includes a first rod body 731 and a second rod body 732. One of the first rod body 731 and the second rod body 732 is provided with an adjustment cavity along its extension direction, and an internal thread is provided in the adjustment cavity, and the other is provided with an external thread. The two are threadedly connected to achieve length adjustment. For example, one end of the first rod body 731 is rotatably connected to the second transmission arm 72, and the other end is provided with an external thread; one end of the second rod body 732 is rotatably connected to the first transmission arm 71, and the other end is provided with an adjustment cavity. The first rod body 731 is threadedly screwed in the adjustment cavity, and the overall length of the first rod body 731 and the second rod body 732 after being connected can be adjusted by screwing. Then, the idle stroke distance of the linkage mechanism 7 is adjusted according to the actual installation situation, so that the idle stroke stage of the linkage mechanism 7 meets the design requirements.

[0129] Optionally, the anti-locking mechanism 3 has a second locking position, and the second locking position is located between the first locking position and the unlocking position. That is, when the locking rod 32 of the anti-locking mechanism 3 moves from the unlocking position to the first locking position, it passes through the second locking position. Specifically, when the isolating switch 5 moves from the third closing position to the fourth opening position, the anti-locking mechanism 3 moves from the unlocking position to the second locking position, and the anti-locking mechanism 3 in the second locking position is used to prevent the operating mechanism 12 from moving from the first opening position to the first closing position. That is to say, when the grounding knife 21 of the grounding switch 2 is in the second opening position and the isolating knife 51 of the isolating switch 5 moves to the fourth opening position ( Fig.15 The locking rod 32 of the anti-locking mechanism 3 is in the second locking position, and the second locking position can also block the anti-locking fitting 122 of the operating mechanism 12 from rotating from the first opening position to the first closing position, thereby preventing the circuit breaker 1 from closing in this state. In this state, if the operator closes the circuit breaker 1, there is a certain safety risk. The second locking position of the anti-locking mechanism 3 can prevent the circuit breaker 1 from closing in this state, thereby improving the safety of operation.

[0130] The operation process of the switch device provided in this embodiment is roughly as follows:

[0131] See also Fig.12 , which is a simplified schematic diagram when the grounding switch 21 of the grounding switch 2 in the switch device is in the second opening position and the isolating switch 51 of the isolating switch 5 is in the third closing position. Fig.14 for Fig.12 . Under the elastic force of the first elastic member 34 and its own gravity, the locking rod 32 maintains a distance L1 from the matching portion 1222 of the anti-locking fitting 122, and there is a gap between the cam disc 313 of the cam assembly 31 and the locking rod 32. At this time, the locking rod 32 is in the unlocked position, and the closing operation shaft 121 can be rotated clockwise normally to release the energy of the closing spring 13 and complete the closing of the circuit breaker 1. In this process, the anti-locking fitting 122 is driven by the closing operation shaft 121 to rotate from the first opening position to the first closing position.

[0132] exist Fig.12 On the basis of the corresponding state, the isolating switch main shaft 6 is operated to rotate counterclockwise to rotate the isolating knife switch 51 from the third closing position to the fourth opening position, such as Fig.15 As shown, at this time, the grounding switch 21 is still in the second opening position, and the isolation switch 51 is in the fourth opening position. Figures 12 to 15 In this process, the isolating switch main shaft 6 rotates through the second transmission arm 72 to drive the pull rod 73 to rotate. Fig.13Due to the presence of the waist-shaped hole 7111 on the first transmission arm 71, the pull rod 73 first drives the first transmission arm 71 to rotate counterclockwise relative to the grounding switch main shaft 4, and then drives the first transmission arm 71 to rotate clockwise relative to the grounding switch main shaft 4. The first pin shaft 74 slides with the waist-shaped hole 7111, and the first transmission arm 71 will not drive the grounding switch main shaft 4 to rotate through the first pin shaft 74, so that the grounding knife 21 is always maintained in the second opening position. When the isolation knife 51 rotates to the fourth opening position, the first pin shaft 74 just abuts against the inner wall of one end of the waist-shaped hole 7111. Fig.16 Shown is Fig.15 , at this time, the cam plate 313 is driven by the isolating switch main shaft 6 to rotate to contact the locking nut 37 at the bottom of the locking rod 32, so that the locking rod 32 is pushed by the cam plate 313 and moves from the unlocking position to the second locking position. At this time, the distance L2 is maintained between the locking rod 32 and the matching portion 1222 of the anti-locking matching piece 122, and L2 is smaller than L1. This distance prevents the anti-locking matching piece 122 from rotating smoothly to the first closing position, thereby preventing the circuit breaker 1 from closing.

[0133] That is, in Fig.15 and Fig.16 As shown, when the grounding switch 21 is in the second opening position and the isolating switch 51 is in the fourth opening position, the locking rod 32 of the anti-locking mechanism 3 is in the second locking position, which can prevent the circuit breaker 1 from closing.

[0134] exist Fig.15 On the basis of the corresponding state, when the isolating switch main shaft 6 or the grounding switch main shaft 4 is operated to rotate counterclockwise, the grounding switch main shaft 4 can drive the first transmission arm 71 to rotate synchronously, and the isolating switch main shaft 6 drives the isolating knife switch 51 to move through the pull rod 73 and the second transmission arm 72; or when the isolating switch main shaft 6 rotates, the second transmission arm 72, the pull rod 73 and the first transmission arm 71 drive the grounding switch main shaft 4 to rotate, so that the grounding knife switch 21 rotates to the second closing position. Finally, the grounding knife switch 21 rotates to the second closing position, and the isolating switch 5 rotates to the third opening position. Fig.17 The status shown. Figures 15 to 17 During this process, the cam plate 313 rotates under the drive of the isolating switch main shaft 6 to push the locking rod 32 to move upward from the second locking position to the first locking position, and the first elastic member 34 is compressed and deformed. Fig.18 As shown, at this time, the top end of the locking rod 32 maintains a distance L3 with the matching portion 1222, and L3 is smaller than L2. In this state, due to the blocking effect of the locking rod 32, the matching portion 1222 cannot be smoothly rotated to the first closing position, the energy of the closing spring 13 cannot be released, and the circuit breaker 1 cannot be closed, and remains in the open state.

[0135] When the isolating switch main shaft 6 or the earthing switch main shaft 4 is rotated clockwise to Fig.12 In the state shown, the locking rod 32 returns to the unlocking position under the elastic force of the first elastic member 34 and its own gravity. At this time, the top of the locking rod 32 maintains a distance L1 from the matching portion 1222, and the circuit breaker 1 can be normally operated for closing.

[0136] For example, L3 is 3 mm, L2 is 11 mm, and L1 is 15 mm. In other embodiments, L1, L2, and L3 can be selected according to design requirements. The specific values ​​of L1, L2, and L3 are not limited here, as long as L1>L2>L3 is satisfied.

[0137] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A switch device, characterized in that: include: A circuit breaker (1), comprising a mounting frame (11) and an operating mechanism (12), wherein the operating mechanism (12) is movably arranged on the mounting frame (11) between a first closing position and a first opening position, wherein the first closing position is the position of the operating mechanism (12) when the circuit breaker (1) is in a closed state, and the first opening position is the position of the operating mechanism (12) when the circuit breaker (1) is in an open state; A grounding switch (2), arranged on the mounting frame (11); An anti-locking mechanism (3) is drivingly connected to the grounding switch (2) and movably connected to the mounting frame (11); When the grounding switch (2) switches from an open state to a closed state, it drives the anti-locking mechanism (3) to move from an unlocked position to a first locked position; the anti-locking mechanism (3) in the first locked position is used to block the operating mechanism (12) from moving from the first open position to the first closed position, and the anti-locking mechanism (3) in the unlocked position is used to prevent the operating mechanism (12) from moving from the first open position to the first closed position.

2. The switch device according to claim 1, characterized in that: The switch device further comprises: A grounding switch main shaft (4) is movably arranged on the mounting frame (11) and connected to the grounding switch (2); the grounding switch main shaft (4) is used to drive the grounding switch (2) to switch back and forth between a second closing position and a second opening position, thereby realizing the opening and closing of the grounding switch (2); An isolating switch (5) is arranged on the mounting frame (11); An isolating switch main shaft (6) is movably arranged on the mounting frame (11) and connected to the isolating switch (5), the isolating switch main shaft (6) being used to drive the isolating switch (5) to switch back and forth between a third closing position and a third opening position, thereby realizing opening and closing of the isolating switch (5); a linkage mechanism (7) which is in driving connection with both the grounding switch main shaft (4) and the isolating switch main shaft (6); when the grounding switch (2) is switched from the second open position to the second closed position, the isolating switch (5) is switched from the third closed position to the third open position; The anti-locking mechanism (3) is drivingly connected to the grounding switch main shaft (4) or the isolating switch main shaft (6) so as to move between the first locking position and the unlocking position.

3. The switch device according to claim 2, characterized in that: The grounding switch main shaft (4) and the isolating switch main shaft (6) are both rotatably arranged on the mounting frame (11); the anti-locking mechanism (3) comprises: A cam assembly (31) is arranged on the grounding switch main shaft (4) or the isolating switch main shaft (6); The locking rod (32) is slidably matched with the cam profile of the cam assembly (31), and the locking rod (32) is driven by the cam assembly (31) to reciprocate between the first locking position and the unlocking position.

4. The switch device according to claim 3, characterized in that: The mounting frame (11) is connected with: A guide member (33) is provided with a guide portion, and the locking rod (32) and the guide portion are slidably matched along the moving direction of the locking rod (32).

5. The switch device according to claim 4, characterized in that: The anti-locking mechanism (3) further comprises a first elastic member (34), a first stop pin (35) and a second stop pin (36); The locking rod (32) is provided with a first through hole (321) for passing a first stop pin (35) and a second through hole (322) for passing a second stop pin (36) in a radial direction, the first through hole (321) is provided with one or a plurality of the first through holes (321) are provided at intervals along the axial direction of the locking rod (32), and the second through hole (322) is provided with one or a plurality of the second through holes (322) are provided at intervals along the axial direction of the locking rod (32); The guide member (33) comprises a guide plate (331), the guide portion is a guide hole (3311) provided on the guide plate (331), and the locking rod (32) is inserted into the guide hole (3311); The first elastic member (34) is sleeved on the locking rod (32) and compressed between the first stop pin (35) and the guide plate (331); the second stop pin (36) is located on a side of the guide plate (331) facing away from the first stop pin (35).

6. The switch device according to claim 3, characterized in that: The cam assembly (31) comprises: A first clamp (311); A second clamp (312) detachably fastened to the first clamp (311) to clamp the grounding switch main shaft (4) or the isolating switch main shaft (6); A cam plate (313) is disposed on one of the first clamp (311) and the second clamp (312), and the cam plate (313) is slidably matched with the locking rod (32).

7. The switch device according to claim 3, characterized in that: The operating mechanism (12) comprises: A closing operation shaft (121) rotatably arranged on the mounting frame (11); A reverse locking fitting (122), comprising a connecting portion (1221) and a matching portion (1222) connected to each other, wherein the connecting portion (1221) is connected to the closing operation shaft (121) so as to drive the matching portion (1222) to rotate between the first opening position and the first closing position under the drive of the closing operation shaft (121), and the matching portion (1222) is arranged opposite to the locking rod (32); The locking rod (32) moves closer to or farther away from the matching portion (1222) to block or prevent the matching portion (1222) from rotating from the first opening position to the first closing position.

8. The switch device according to any one of claims 2 to 7, characterized in that: The linkage mechanism (7) comprises a first transmission arm (71), a second transmission arm (72) and a pull rod (73); The first transmission arm (71) is connected to the earthing switch main shaft (4) and has a movable state relative to the earthing switch main shaft (4) and a fixed state relative to the earthing switch main shaft (4); the second transmission arm (72) is connected to the isolating switch main shaft (6); one end of the pull rod (73) is movably connected to the first transmission arm (71), and the other end is movably connected to the second transmission arm (72); the first transmission arm (71), the second transmission arm (72), the pull rod (73) and the mounting frame (11) constitute a four-bar linkage; The isolating switch (5) has a fourth opening position, and the fourth opening position is located between the third closing position and the third opening position; When the isolating switch (5) moves from the third closing position to the fourth opening position, the first transmission arm (71) moves relative to the grounding switch main shaft (4); when the isolating switch (5) moves from the fourth opening position to the third opening position, the first transmission arm (71) is fixed relative to the grounding switch main shaft (4) so ​​as to drive the grounding switch (2) to switch from the second opening position to the second closing position through the grounding switch main shaft (4).

9. The switch device according to claim 8, characterized in that: The grounding switch main shaft (4) is rotatably connected to the mounting frame (11), and the first transmission arm (71) comprises: A first sleeve portion (711) is coaxially sleeved on the earthing switch main shaft (4), a waist-shaped hole (7111) is circumferentially arranged on the first sleeve portion (711), and the linkage mechanism (7) further comprises a first pin shaft (74), the first pin shaft (74) is passed through the waist-shaped hole (7111) and the earthing switch main shaft (4), and is slidably matched with the waist-shaped hole (7111); The first connecting arm (712) has one end fixedly connected to the first sleeve portion (711) and the other end rotatably connected to the pull rod (73).

10. The switch device according to claim 9, characterized in that The first sleeve portion (711) is provided with two waist-shaped holes (7111), and the two waist-shaped holes (7111) are arranged opposite to each other along the diameter direction of the first sleeve portion (711), and the first pin shaft (74) passes through the two waist-shaped holes (7111) and the grounding switch main shaft (4).

11. The switch device according to claim 8, characterized in that The anti-locking mechanism (3) has a second locking position, and the second locking position is located between the first locking position and the unlocking position; When the isolating switch (5) moves from the third closing position to the fourth opening position, the anti-locking mechanism (3) moves from the unlocking position to the second locking position, and the anti-locking mechanism (3) at the second locking position is used to prevent the operating mechanism (12) from moving from the first opening position to the first closing position.

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