A mechanical interlocking device for a switchgear and the switchgear itself.

Abstract

This utility model belongs to the field of electrical equipment technology, and discloses a mechanical interlocking device for a switchgear and the switchgear itself. The mechanical interlocking device includes a first linkage component, a second linkage component, and a third linkage component. The first linkage component includes a first interlocking rod connected to the three-position switch operating mechanism; the second linkage component includes a second interlocking rod connected to the circuit breaker operating mechanism; the third linkage component includes a door interlocking plate and a first elastic element. The door interlocking plate is movably connected inside the switchgear via the first elastic element and locks or unlocks the cable compartment door. Both the first and second interlocking rods are movably disposed inside the switchgear and abut against or separate from the door interlocking plate. The door interlocking plate locks the cable compartment door under the push of the first or second interlocking rod, and causes the first elastic element to deform. When the circuit breaker operating mechanism is closed and the three-position switch operating mechanism is grounded, the door interlocking plate unlocks the cable compartment door. This interlocking device reduces the number of components, simplifies the structure, and reduces assembly difficulty.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to a mechanical interlocking device for a switch cabinet and the switch cabinet itself. Background Technology

[0002] Gas-insulated switchgear (CGIS) products include a mechanism compartment, cable compartment, circuit breaker, and three-position switch. The operating mechanisms of the circuit breaker and the three-position switch are located in the mechanism compartment. To meet the five-proof interlocking requirements of the switchgear, interlocking devices are installed between the circuit breaker operating mechanism, the three-position switch operating mechanism, and the cable compartment door. These interlocking devices allow the cable compartment door to open only when the requirements are met. Some switchgear uses electromagnetic locks, but the electromagnetic locks may fail under the long-term electromagnetic environment of the switchgear's operation, posing a safety hazard.

[0003] To address this issue, the interlocking devices in related technologies typically include a circuit breaker drive mechanism, a circuit breaker locking block, a three-position drive mechanism, and a three-position locking block. The circuit breaker locking block and the three-position locking block are locked or unlocked by the cable compartment door. The circuit breaker operating mechanism, linked to the circuit breaker locking block via the circuit breaker drive mechanism, unlocks the circuit breaker locking block from the cable compartment door when the circuit breaker is closed. The three-position switch operating mechanism, linked to the three-position locking block via the three-position drive mechanism, unlocks the three-position locking block from the cable compartment door when the circuit breaker is closed or the three-position switch is grounded. When the circuit breaker is closed and the three-position switch is grounded, both the circuit breaker locking block and the three-position locking block are unlocked from the cable compartment door, at which point the cable compartment door can be opened.

[0004] The above technical solution has the following drawbacks: the circuit breaker operating mechanism and the three-position switch operating mechanism are each linked to a locking block to lock and unlock the cable compartment door, resulting in a large number of structural parts, complex structure, and large space occupation of the interlocking device, and the assembly process is also relatively cumbersome.

[0005] Therefore, there is an urgent need for a mechanical interlocking device for switchgear and a switchgear itself to solve the aforementioned problems in the existing technology. Utility Model Content

[0006] The purpose of this utility model is to provide a mechanical interlocking device and switch cabinet for switch cabinets, which can reduce the number of parts of the interlocking device, simplify the structure, reduce the space occupied in the switch cabinet, and reduce the assembly difficulty while meeting the requirements of safe operation.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] On one hand, a mechanical interlocking device for a switchgear is provided, the switchgear including a mechanism compartment, a cable compartment, and a cable compartment door, wherein a circuit breaker operating mechanism and a three-position switch operating mechanism are installed in the mechanism compartment, and the mechanical interlocking device includes:

[0009] The first linkage component includes a first interlocking rod movably disposed within the switch cabinet, the first end of the first interlocking rod being connected to the three-position switch operating mechanism;

[0010] The second linkage component includes a second interlocking rod movably disposed within the switch cabinet, the first end of which is connected to the circuit breaker operating mechanism;

[0011] The third linkage component includes a door interlock plate and a first elastic element. The door interlock plate is movably connected to the switch cabinet through the first elastic element and is locked or unlocked with the cable compartment door. The second end of the first interlock rod and the second end of the second interlock rod are both in contact with or separate from the door interlock plate.

[0012] The door interlock plate is used to lock the cable compartment door under the pushing action of the first interlock rod or the second interlock rod, and to drive the first elastic element to deform elastically; when the circuit breaker operating mechanism is closed and the three-position switch operating mechanism is grounded, the door interlock plate unlocks the cable compartment door under the elastic force of the first elastic element.

[0013] As an optional solution for the mechanical interlocking device of the switchgear provided by this utility model, the third linkage component further includes a guide and a first mounting bracket;

[0014] The first mounting bracket is connected to the inner wall of the cable compartment and is provided with a through-hole, and the door interlock plate is movably inserted through the through-hole;

[0015] The guide member is slidably mounted on the first mounting bracket and connected to the door interlock plate;

[0016] The first elastic element is telescopically located between the door interlock plate and the first mounting bracket.

[0017] As an optional solution for the mechanical interlocking device of the switchgear provided by this utility model, the first linkage component further includes a first stop, a second elastic component, and a traction component; the mechanical interlocking device further includes a second mounting bracket and a support component connected to the inner wall of the switchgear.

[0018] The first interlocking rod is slidably inserted into the second mounting bracket;

[0019] The first stop is connected to the first interlocking rod, and the second elastic member is sleeved on the first interlocking rod and is telescopically located between the first stop and the second mounting bracket;

[0020] The support member is provided with a guide hole, and the traction member is movably inserted through the guide hole. One end of the traction member is connected to the first interlocking rod, and the other end is connected to the three-position switch operating mechanism. The traction member is used to pull the first interlocking rod when the three-position switch operating mechanism is switched to the grounding state.

[0021] As an optional solution for the mechanical interlocking device of the switchgear provided by this utility model, the second linkage component further includes a second stop and a third elastic member; the mechanical interlocking device also includes a third mounting bracket disposed on the inner wall of the switchgear;

[0022] The second interlocking rod is slidably inserted into the third mounting bracket;

[0023] The second stop is connected to the second interlocking rod, and the third elastic member is sleeved on the second interlocking rod and is telescopically located between the third mounting bracket and the second stop.

[0024] As an optional solution for the mechanical interlocking device of the switchgear provided by this utility model, the mechanical interlocking device further includes a fourth linkage component, which includes a first link, a second link, a third link, and a fixing component;

[0025] The first end of the first link is connected to the operating spindle of the circuit breaker operating mechanism and is used to rotate under the drive of the operating spindle; the second end of the first link is rotatably and slidably connected to the first end of the second link; the second end of the second link is rotatably connected to the first end of the third link, and the second end of the third link is rotatably connected to the second end of the second interlocking rod.

[0026] The fixing member passes through the first end and the second end of the second connecting rod and is connected to the housing of the circuit breaker operating mechanism. The fixing member is rotatably engaged with the second connecting rod.

[0027] As an optional solution for the mechanical interlocking device of the switchgear provided by this utility model, the mechanical interlocking device further includes a fifth linkage component;

[0028] The first end of the fifth linkage component abuts against the door interlock plate, and the second end of the fifth linkage component is connected to the tripping mechanism of the circuit breaker operating mechanism.

[0029] The fifth linkage component is used to drive the tripping mechanism to lock when the door interlock plate and the cable compartment door are unlocked.

[0030] As an optional solution for the mechanical interlocking device of the switchgear provided by this utility model, the fifth linkage component includes a tripping interlocking rod, a first pushing member and a second pushing member; the tripping mechanism includes a tripping interlocking buckle plate, and the tripping interlocking buckle plate is provided with a strip hole;

[0031] The tripping interlock rod is movably disposed inside the switch cabinet. The first end of the tripping interlock rod abuts against the door interlock plate, and the second end of the tripping interlock rod is movably inserted through the strip hole.

[0032] The first pusher and the second pusher are both provided on the trip interlock rod and on both sides of the trip interlock plate. The first pusher and the second pusher can be detachably abutted against the trip interlock plate.

[0033] The tripping interlocking rod drives the tripping interlocking buckle plate to rotate through the first and second pushing members, thereby locking the tripping mechanism.

[0034] As an optional solution for the mechanical interlocking device of the switchgear provided by this utility model, a lock tongue is connected to the cable compartment door, and the lock tongue is provided with a lock hole; a lock pin is provided on the door interlocking plate, and the lock pin is inserted into or disengaged from the lock hole to realize the locking or unlocking of the door interlocking plate and the cable compartment door;

[0035] The mechanical interlocking device also includes a cable compartment door locking assembly, which includes a fixing frame, a blocking component, and a fourth elastic component.

[0036] A partition plate is provided between the mechanism chamber and the cable chamber. The fixed frame is connected to the partition plate. The blocking member is slidably connected to the fixed frame and has a blocking position and a clearance position. The fourth elastic member is connected between the fixed frame and the blocking member.

[0037] When the blocking member is in the avoidance position, the lock pin is inserted into the lock hole, and the blocking member abuts against the lock tongue; when the blocking member is in the blocking position, it is located between the lock pin and the lock hole.

[0038] As an optional solution for the mechanical interlocking device of the switch cabinet provided by this utility model, the fixed frame is provided with a sliding groove, and the blocking component includes a sliding plate, a support plate and a baffle.

[0039] The slide plate slidably passes through the groove and is connected to the fourth elastic element;

[0040] The baffle is connected to the slide plate via the support plate and is spaced apart from the slide plate. The support plate has a protruding push post on the side facing the latch. The baffle is used to block the latch post, and the push post is detachably abutted against the latch.

[0041] On the other hand, a switch cabinet is provided, including a mechanism compartment, a cable compartment, a mechanism compartment door, a cable compartment door, a circuit breaker operating mechanism, a three-position switch operating mechanism, and a mechanical interlocking device for the switch cabinet as described above.

[0042] The mechanism room door is used to cover the entrance of the mechanism room, and the cable room door is used to cover the entrance of the cable room; the circuit breaker operating mechanism and the three-position switch operating mechanism are both located in the mechanism room and are linked to the cable room door through the mechanical interlocking device.

[0043] The beneficial effects of this utility model are:

[0044] This utility model provides a mechanical interlocking device for a switchgear and a switchgear including the mechanical interlocking device. The circuit breaker operating mechanism inside the switchgear is linked to the door interlock plate via a second linkage component, and the three-position switch operating mechanism is linked to the door interlock plate via a first linkage component. When the circuit breaker operating mechanism and the three-position switch operating mechanism are activated, they respectively drive the first interlocking rod and the second interlocking rod to move. Both the first interlocking rod and the second interlocking rod have states of contact with the door interlock plate and states of separation from the door interlock plate. When either the first interlocking rod or the second interlocking rod pushes against the door interlocking plate, the door interlocking plate causes the first elastic element to deform elastically and lock with the cable compartment door. Due to the abutting action of the first and second interlocking rods, the door interlocking plate is prevented from moving to unlock with the cable compartment door, and the cable compartment door remains locked and cannot be opened. Only when both the first and second interlocking rods are separated from the door interlocking plate can the abutting action on the door interlocking plate be released, allowing the door interlocking plate to move to unlock with the cable compartment door under the elastic force of the first elastic element. This achieves the goal that "the cable compartment door can only be unlocked and opened normally when the circuit breaker operating mechanism is closed and the three-position switch operating mechanism is grounded," meeting the safety operation requirements and preventing electrical misoperation problems.

[0045] The first and second linkage components of this mechanical interlocking device are both linked to the door interlocking plate. Interlocking with the cable compartment door can be achieved through a single door interlocking plate, reducing the number of components, simplifying the structure, minimizing space occupation within the switchgear, and lowering assembly difficulty while meeting safety operation requirements. Furthermore, the first elastic element automatically unlocks the door interlocking plate when the circuit breaker is closed or the three-position switch is grounded, eliminating the need for manual unlocking and saving the steps of opening the cable compartment door. Attached Figure Description

[0046] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0047] Figure 1 This is a schematic diagram of the switch cabinet provided in a specific embodiment of the present invention when the cable compartment door is locked;

[0048] Figure 2 yes Figure 1 A partial view;

[0049] Figure 3 This is a schematic diagram of the switch cabinet with the cable compartment door open, provided in a specific embodiment of this utility model;

[0050] Figure 4 yes Figure 3 A partial view;

[0051] Figure 5 This is a schematic diagram of the mechanical interlocking device of the switchgear provided in a specific embodiment of this utility model;

[0052] Figure 6 This is an isometric view of the third linkage component and the cable compartment door when unlocked, provided in a specific embodiment of this utility model;

[0053] Figure 7 This is a schematic diagram of the structure of the third linkage component provided in a specific embodiment of this utility model;

[0054] Figure 8 This is a schematic diagram of the installation of the mechanical interlocking device provided in a specific embodiment of the present invention in the mechanism room;

[0055] Figure 9 This is a schematic diagram of the structure of the three-position switch provided in a specific embodiment of this utility model;

[0056] Figure 10 yes Figure 8 First partial view;

[0057] Figure 11 yes Figure 8 The second partial view;

[0058] Figure 12 This is a schematic diagram showing the connection between the fifth linkage component and the circuit breaker's tripping mechanism provided in a specific embodiment of this utility model;

[0059] Figure 13This is a schematic diagram of the second linkage component and the fourth linkage component provided in a specific embodiment of this utility model;

[0060] Figure 14 This is a first view of the cable compartment door locking assembly provided in a specific embodiment of this utility model;

[0061] Figure 15 This is a second view of the cable compartment door locking assembly provided in a specific embodiment of this utility model.

[0062] In the picture:

[0063] 100. Mechanism room; 200. Cable room; 300. Cable room door; 400. Mechanical interlocking device; 500. Circuit breaker operating mechanism; 600. Three-position switch operating mechanism; 700. Partition plate; 800. Gas box;

[0064] 401. Lock tongue; 402. Lock hole;

[0065] 501. Operating spindle; 502. Opening mechanism;

[0066] 5021. Tripping interlocking plate; 5022. Tripping drive shaft; 5023. Tripping connecting plate one; 5024. Tripping connecting plate two; 5025. Tripping stop post; 5026. Tripping buckle plate; 5027. Guide post;

[0067] 5021a, strip-shaped hole;

[0068] 601. Three-position interlock drive board; 602. Grounding interlock board; 603. Three-position interlock spring;

[0069] 701, Fourth guide hole;

[0070] 1. First linkage component; 2. Second linkage component; 3. Third linkage component; 4. Fourth linkage component; 5. Fifth linkage component; 6. Cable compartment door locking component; 7. Second mounting bracket; 8. Support component; 9. Third mounting bracket;

[0071] 11. First interlocking rod; 12. First stop; 13. Second elastic element; 14. Traction element;

[0072] 21. Second interlocking rod; 22. Second stop; 23. Third elastic element;

[0073] 31. Door interlock plate; 32. First elastic element; 33. Guide element; 34. First mounting bracket;

[0074] 311. Locking pin; 312. First plate segment; 313. Second plate segment; 314. Third plate segment;

[0075] 331. First stop; 332. Second stop;

[0076] 340. Through-hole; 341. First mounting plate; 342. First connecting plate; 343. Guide plate;

[0077] 41. First connecting rod; 42. Second connecting rod; 43. Third connecting rod; 44. Fixing component; 45. Connecting shaft;

[0078] 411. Transmission hole;

[0079] 421. Guide sliding hole;

[0080] 51. Tripping interlocking rod; 52. First pusher; 53. Second pusher;

[0081] 61. Fixing bracket; 62. Blocking component; 63. Fourth elastic component;

[0082] 611. Fixed carrier plate; 612. Positioning plate;

[0083] 6111, U-shaped frame; 6112, fourth mounting plate;

[0084] 6121, Fourth connecting plate; 6122, Positioning frame; 6120, Slide groove;

[0085] 621. Skateboard; 622. Support plate; 623. Baffle; 624. Push post; 625. Clearance gap;

[0086] 71. Second mounting plate; 72. Second connecting plate;

[0087] 711. First fixing hole; 712. Second guide hole;

[0088] 81. Guide hole;

[0089] 91. Third mounting plate; 92. Third connecting plate;

[0090] 911. Second fixing hole; 912. Third guide hole. Detailed Implementation

[0091] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0092] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0093] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0094] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0095] In this embodiment, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0096] In the embodiments of this utility model, the same reference numerals denote the same parts, and for the sake of brevity, detailed descriptions of the same parts are omitted in different embodiments.

[0097] like Figure 1 As shown, this embodiment provides a switch cabinet, including a mechanism compartment 100, a cable compartment 200, a mechanism compartment door (not shown in the figure), a cable compartment door 300, a circuit breaker, a three-position switch, a gas box 800, and a mechanical interlocking device 400 for the switch cabinet.

[0098] The circuit breaker includes a circuit breaker body (not shown in the figure) and a circuit breaker operating mechanism 500. The three-position switch includes a three-position switch body (not shown in the figure) and a three-position switch operating mechanism 600. A gas box 800 is located on one side of the mechanism compartment 100 and above the cable compartment 200. Both the circuit breaker body and the three-position switch body are housed within the gas box 800. The circuit breaker operating mechanism 500 and the three-position switch operating mechanism 600 are located within the mechanism compartment 100. A door to the mechanism compartment 100 is used to cover the entrance to the cable compartment 200, and a door 300 to the cable compartment 200 is used to cover the entrance to the cable compartment 200. The cable compartment 200 is located below the mechanism compartment 100 to facilitate cable exit from the bottom of the switchgear. A partition plate 700 is provided between the mechanism compartment 100 and the cable compartment 200 to separate them. Correspondingly, the cable compartment door 300 is located below the mechanism compartment door.

[0099] The circuit breaker operating mechanism 500 and the three-position switch operating mechanism 600 are linked to the cable compartment door 300 via a mechanical interlocking device 400. The mechanical interlocking device 400 provided in this embodiment can reduce the number of parts, simplify the structure, reduce the space occupied in the switch cabinet, and lower the assembly difficulty while meeting safe operation requirements.

[0100] like Figure 2 , Figure 3 , Figure 4 as well as Figure 5 As shown, the mechanical interlocking device 400 includes a first linkage component 1, a second linkage component 2, and a third linkage component 3.

[0101] The first linkage component 1 includes a first interlocking rod 11, which is movably disposed within the switch cabinet. Specifically, the first interlocking rod 11 is movably inserted through the partition plate 700, and its first end is connected to the three-position switch operating mechanism 600. The first interlocking rod 11 has a grounding position, a first closed position, and a first open position, corresponding to the grounding state, the isolation closed state, and the isolation open state of the three-position switch operating mechanism 600, respectively.

[0102] The second linkage component 2 includes a second interlocking rod 21, which is movably disposed within the switch cabinet. Specifically, the second interlocking rod 21 is movably inserted through the partition plate 700, and its first end is connected to the circuit breaker operating mechanism 500. The second interlocking rod 21 has a second closed position and a second open position, corresponding to the closed and open states of the circuit breaker operating mechanism 500, respectively.

[0103] The third linkage component 3 includes a door interlock plate 31 and a first elastic element 32. The door interlock plate 31 is movably connected to the cable compartment 200 via the first elastic element 32 and is locked or unlocked with the cable compartment door 300. That is, the door interlock plate 31 can reciprocate between the locked position and the unlocked position of the cable compartment door 300. The second end of the second interlock rod 21 of the first interlock rod 11 is either abutted or separated from the door interlock plate 31. The door interlock plate 31 is used to lock the cable compartment door 300 under the pushing action of the first interlock rod 11 or the second interlock rod 21, and to drive the first elastic element 32 to elastically deform. When the circuit breaker operating mechanism 500 is closed and the three-position switch operating mechanism 600 is grounded, the door interlock plate 31 unlocks the cable compartment door 300 under the elastic force of the first elastic element 32.

[0104] In this embodiment, when the circuit breaker operating mechanism 500 is closed, it drives the second interlocking rod 21 to move away from the door interlocking plate 31. When the three-position switch operating mechanism 600 is grounded, it drives the first interlocking rod 11 to move away from the door interlocking plate 31. Therefore, when the circuit breaker operating mechanism 500 is closed and the three-position switch operating mechanism 600 is grounded, neither the first interlocking rod 11 nor the second interlocking rod 21 pushes against and restricts the door interlocking plate 31, allowing the door interlocking plate 31 to move towards unlocking the cable compartment door 300 under the action of the first elastic member 32.

[0105] The mechanical interlocking device for the switchgear provided in this embodiment includes a circuit breaker operating mechanism 500 in the switchgear's mechanism compartment 100 that is linked to a door interlock plate 31 via a second linkage component 2, and a three-position switch operating mechanism 600 that is linked to the door interlock plate 31 via a first linkage component 1. When the circuit breaker operating mechanism 500 and the three-position switch operating mechanism 600 are activated, they can respectively drive the first interlocking rod 11 and the second interlocking rod 21 to move. Both the first interlocking rod 11 and the second interlocking rod 21 have states of contact with the door interlock plate 31 and states of separation from the door interlock plate 31. When either the first interlocking rod 11 or the second interlocking rod 21 pushes against the door interlocking plate 31, the door interlocking plate 31 causes the first elastic element 32 to deform elastically and lock with the cable compartment door 300. Due to the abutting action of the first interlocking rod 11 and the second interlocking rod 21, the door interlocking plate 31 is prevented from moving to unlock the cable compartment door 300, and the cable compartment door 300 remains locked and cannot be opened. Only when both the first interlocking rod 11 and the second interlocking rod 21 are separated from the door interlocking plate 31 can the abutting action on the door interlocking plate 31 be canceled, allowing the door interlocking plate 31 to move to unlock the cable compartment door 300 under the elastic force of the first elastic element 32. This achieves the goal that "the cable compartment door 300 can only be unlocked and opened normally when the circuit breaker operating mechanism 500 is closed and the three-position switch operating mechanism 600 is grounded," meeting the safety operation requirements and preventing electrical misoperation problems.

[0106] More specifically, when the first interlocking rod 11 is in the first closed position or the first open position, or when the second interlocking rod 21 is in the second open position, the door interlocking plate 31 is prevented from unlocking from the cable compartment door 300. When the second interlocking rod 21 is in the second closed position and the first interlocking rod 11 is in the grounded position, the door interlocking plate 31 is unlocked from the cable compartment door 300 under the elastic force of the first elastic member 32, and the first interlocking rod 11 and the second interlocking rod 21 are blocked.

[0107] When the first interlocking rod 11 is in the first closed position or the first open position, or when the second interlocking rod 21 is in the second open position, it can prevent the door interlocking plate 31 from unlocking from the cable compartment door 300. That is, when the three-position switch operating mechanism 600 is in the isolated closed state or the isolated open state, or the circuit breaker operating mechanism 500 is in the open state, the door interlocking plate 31 is locked to the cable compartment door 300 under the obstruction of the first interlocking rod 11 or the second interlocking rod 21, and the cable compartment door 300 cannot be opened. Only when the second interlocking rod 21 is in the second closed position and the first interlocking rod 11 is in the grounded position can the door interlocking plate 31 unlock from the cable compartment door 300 under the action of the first elastic element 32. At this time, the cable compartment door 300 can be opened normally, meeting the safety operation requirements and preventing electrical misoperation problems. Furthermore, when the door interlock plate 31 is in the unlocked state with the cable compartment door 300, it can stop the first interlock rod 11 and the second interlock rod 21 to prevent the first interlock rod 11 from exiting the grounding position and the second interlock rod 21 from exiting the second closing position, thus ensuring the operational safety when opening the cable compartment door 300 for inspection and maintenance.

[0108] like Figure 6 As shown, in this embodiment, a latch 401 is connected to the cable compartment door 300, and the latch 401 is provided with a lock hole 402; a lock pin 311 is provided on the door interlock plate 31, and the lock pin 311 can be inserted into or disengaged from the lock hole 402 to lock or unlock the door interlock plate 31 and the cable compartment door 300. When the first interlock rod 11 is in the first closed position, the first interlock rod 11 can abut against the side of the door interlock plate 31 opposite to the lock pin 311 to prevent the lock pin 311 from disengaging from the lock hole 402 and prevent the cable compartment door 300 from unlocking. When the second interlock rod 21 is in the second open position, the second interlock rod 21 can abut against the side of the door interlock plate 31 opposite to the lock pin 311 to prevent the lock pin 311 from disengaging from the lock hole 402 and prevent the cable compartment door 300 from unlocking. The first open position of the first interlocking rod 11 is between the grounding position and the first closed position. When it is in the first open position, since the second interlocking rod 21 is in the second open position, it can also prevent the locking pin 311 on the door interlocking plate 31 from disengaging from the lock hole 402.

[0109] like Figure 2 As shown, the door interlock plate 31 is in the locked position with the cable compartment door 300, and the cable compartment door 300 cannot be opened. Figure 3 and Figure 4 As shown, the locking pin 311 on the door interlock plate 31 disengages from the lock hole 402 and is in the unlocked position, which unlocks the cable compartment door 300. The door interlock plate 31 can reciprocate between the locked position and the unlocked position.

[0110] like Figure 6 and Figure 7 As shown, the third linkage assembly 3 also includes a guide member 33 and a first mounting bracket 34. Specifically, the first mounting bracket 34 is fixedly connected to the bottom surface of the partition plate 700. The first mounting bracket 34 is provided with a through-hole 340, through which the door interlock plate 31 is movably inserted. The guide member 33 is slidably inserted through the first mounting bracket 34 and connected to the door interlock plate 31. The first elastic member 32 is telescopically located between the door interlock plate 31 and the first mounting bracket 34.

[0111] When the door interlock plate 31 is in the locked position, under the abutment of the first interlock rod 11 or the second interlock rod 21, the door interlock plate 31 compresses the first elastic member 32. When the first interlock rod 11 switches to the ground position and the second interlock rod 21 is in the closed position, both move away from the door interlock plate 31, and the first elastic member 32 releases its elastic potential energy, pushing the door interlock plate 31 to the unlock position, causing the lock pin 311 to disengage from the lock hole 402. The guide member 33 not only provides guidance for the movement of the door interlock plate 31, but also provides guidance for the extension and retraction of the first elastic member 32. By providing a through-hole 340 for the door interlock plate 31 to pass through on the first mounting bracket 34, the door interlock plate 31 can move within the through-hole 340, avoiding interference between the first mounting bracket 34 and the door interlock plate 31, and saving the space occupied by the door interlock plate 31 and the first mounting bracket 34 after installation.

[0112] Specifically, the first mounting bracket 34 includes a first mounting plate 341, a first connecting plate 342, and a guide plate 343. The guide plates 343 are spaced below the partition plate 700, and both ends of the guide plates 343 are connected to the first connecting plates 342. The end of the first connecting plate 342 furthest from the guide plate 343 is connected to the first mounting plate 341. The first mounting plates 341 are fixedly connected to the partition plate 700 by screws or other fasteners. The entire first mounting bracket 34 has a U-shaped structure. The guide plate 343 has a first guide hole, and a guide member 33 passes through this first guide hole and can slide up and down. A first elastic member 32 is located between the door interlock plate 31 and the guide plate 343.

[0113] Furthermore, the guide member 33 penetrates the door interlock plate 31, and a first stop portion 331 is provided on the side of the door interlock plate 31 facing away from the first elastic member 32. A second stop portion 332 is provided on the side of the guide plate 343 facing away from the first elastic member 32. By providing the first stop portion 331 and the second stop portion 332, the guide member 33 is connected to the door interlock plate 31 while preventing it from falling off.

[0114] For example, the first elastic element 32 is a spring. The first stop 331 and the guide 33 constitute a screw, and the second stop 332 is a nut screwed onto the screw.

[0115] For example, two first elastic members 32 and two guide members 33 are provided. The two first elastic members 32 are fitted onto the two guide members 33 in a one-to-one correspondence, which can provide a large rebound force, so that the door interlock plate 31 is quickly pushed to the unlock position, avoiding unlocking failure. At the same time, when the door interlock plate 31 is in the unlock position, the two first elastic members 32 can, to a certain extent, prevent the first interlock rod 11 from exiting the ground position and the second interlock rod 21 from exiting the closed position.

[0116] like Figure 5 , Figure 8 as well as Figure 10 As shown, the first linkage component 1 also includes a first stop 12, a second elastic element 13, and a traction element 14. The mechanical interlocking device 400 also includes a second mounting bracket 7 and a support 8 connected to the inner wall of the switch cabinet. Specifically, the second mounting bracket 7 is fixedly connected to the top surface of the partition plate 700, and the support 8 is fixedly connected to the inner wall of the mechanism chamber 100. The first interlocking rod 11 is slidably inserted through the second mounting bracket 7 and abuts against or separates from the door interlocking plate 31. The first stop 12 is connected to the first interlocking rod 11, and the second elastic element 13 is sleeved on the first interlocking rod 11 and is telescopically located between the first stop 12 and the second mounting bracket 7. The support 8 is provided with a guide hole 81, and the traction element 14 is movably inserted through the guide hole 81. One end of the traction element 14 is connected to the first interlocking rod 11, and the other end is connected to the three-position switch operating mechanism 600. In this embodiment, the traction element 14 can pull the first interlocking rod 11 to slide vertically.

[0117] When the three-position switch operating mechanism 600 switches to the grounded state, it pulls the first interlocking rod 11 through the traction member 14, causing the first interlocking rod 11 to slide upward along the second mounting bracket 7 to the grounded position. At the same time, the first interlocking rod 11 compresses the second elastic member 13 through the first stop member 12, causing the second elastic member 13 to accumulate potential energy. When the three-position switch operating mechanism 600 exits the grounded state, the second elastic member 13 releases its potential energy, causing the first interlocking rod 11 to slide rapidly downward to the first closed position under the elastic force of the second elastic member 13, which can push against the door interlocking plate 31, causing the locking pin 311 to insert into the lock hole 402.

[0118] For example, the second elastic element 13 is a spring. The traction element 14 is a steel cable made of braided steel wire, which can withstand a large traction load. The steel cable may be covered with a soft plastic shell.

[0119] For example, the support member 8 is an L-shaped metal bent plate, one end of which is connected to the inner wall of the mechanism chamber 100 by fasteners such as screws, and the other end has a guide hole 81 so that the traction member 14 can pass through, which is used to fix the traction member 14 and change the direction of the force of the traction member 14, similar to the function of a pulley block.

[0120] like Figure 9 As shown, the three-position switch operating mechanism 600 includes a three-position interlock drive plate 601, a grounding interlock plate 602, and a three-position interlock spring 603. The grounding interlock plate 602 is connected to one end of the traction member 14. The three-position interlock spring 603 is connected between the grounding interlock plate 602 and the body of the three-position switch operating mechanism 600. When the three-position interlock drive plate 601 rotates counterclockwise, it moves the grounding interlock plate 602 to the right (see reference). Figure 9 (in the orientation of the center), the grounding interlock plate 602 then pulls the traction member 14, which in turn pulls the first interlock rod 11 upward to the grounding position. During this period, the three-position interlock spring 603 is stretched. When the three-position interlock drive plate 601 rotates clockwise to reset, the grounding interlock plate 602 moves to the left to reset under the elastic force of the three-position interlock spring 603 (refer to the orientation of the center). Figure 9 (location in the middle).

[0121] See Figure 10 The second mounting bracket 7 includes two second mounting plates 71 spaced apart and a second connecting plate 72 connected between the two second mounting plates 71. The second connecting plate 72 and the two second mounting plates 71 form a U-shaped structure. One of the second mounting plates 71 is provided with a first fixing hole 711, through which fasteners such as screws can pass and connect to the partition plate 700. The other second mounting plate 71 is spaced apart from the partition plate 700. Both second mounting plates 71 are provided with second guide holes 712, and the partition plate 700 is provided with a first through hole directly opposite the second guide hole 712. The first interlocking rod 11 passes through the second guide holes 712 on the two second mounting plates 71 and the first through hole on the partition plate 700 to detachably abut against the door interlocking plate 31.

[0122] The second mounting bracket 7 is exemplarily formed by integrally bending a metal plate, and the first stop 12 is exemplarily a stop pin that passes through the first interlocking rod 11. The first interlocking rod 11 can be a round steel bar, with its upper end flattened and provided with a connecting hole for connecting the traction member 14.

[0123] like Figure 8 and Figure 11As shown, the second linkage component 2 also includes a second stop 22 and a third elastic member 23. The mechanical interlocking device 400 also includes a third mounting bracket 9 disposed on the inner wall of the switch cabinet. In this embodiment, the third mounting bracket 9 is specifically disposed on the top surface of the partition plate 700. The second interlocking rod 21 is slidably inserted through the third mounting bracket 9. The first end of the second interlocking rod 21 abuts against or separates from the door interlocking plate 31, and the second end of the second interlocking rod 21 is connected to the operating spindle 501 of the circuit breaker operating mechanism 500 (e.g., ...). Figure 12 (As shown) The connection is as follows. The second stop 22 is connected to the second interlocking rod 21, and the third elastic member 23 is sleeved on the second interlocking rod 21 and is telescopically located between the third mounting bracket 9 and the second stop 22. Specifically, the second interlocking rod 21 moves vertically between the second closed position and the second open position.

[0124] When the operating spindle 501 of the circuit breaker operating mechanism 500 rotates to switch to the closing state, the operating spindle 501 drives the second interlocking rod 21 to move upward to the second closing position. During this process, the second interlocking rod 21 compresses the third elastic element 23 through the second stop 22, so that the third elastic element 23 continues to have potential energy. When the operating spindle 501 exits the closing state, the third elastic element 23 can release potential energy, so that the second interlocking rod 21 is quickly rebounded to the second opening position to push the door interlocking plate 31, so that the locking pin 311 is inserted into the locking hole 402.

[0125] For example, the third elastic element 23 is a spring.

[0126] See Figure 11 The third mounting bracket 9 includes two spaced-apart third mounting plates 91 and a third connecting plate 92 connected between the two second mounting plates 71. The third connecting plate 92 and the two third mounting plates 91 form a U-shaped structure. One of the third mounting plates 91 has a second fixing hole 911 through which fasteners such as screws can pass and connect to the partition plate 700. The other third mounting plate 91 is spaced apart from the partition plate 700. Both third mounting plates 91 have third guide holes 912, and the partition plate 700 has a second through hole directly opposite the third guide hole 912. The second interlocking rod 21 passes through the third guide holes 912 on the two third mounting plates 91 and the second through hole on the partition plate 700 to detachably abut against the door interlocking plate 31.

[0127] The third mounting bracket 9 is exemplarily formed by integral bending of a metal plate, and the second stop 22 is exemplarily a stop pin that passes through the second interlocking rod 21.

[0128] See Figure 8 and Figure 13The mechanical interlocking device 400 also includes a fourth linkage assembly 4. The operating spindle 501 of the circuit breaker operating mechanism 500 is connected to the second interlocking rod 21 through the fourth linkage assembly 4 to drive the second interlocking rod 21 to move. Specifically, the fourth linkage assembly 4 includes a first connecting rod 41, a second connecting rod 42, a third connecting rod 43, and a fixing member 44. The first end of the first connecting rod 41 is connected to the operating spindle 501 and is used to rotate under the drive of the operating spindle 501. The second end of the first connecting rod 41 is rotatably and slidably connected to the first end of the second connecting rod 42. The second end of the second connecting rod 42 is rotatably connected to the first end of the third connecting rod 43, and the second end of the third connecting rod 43 is rotatably connected to the second end of the second interlocking rod 21. The fixing member 44 passes between the first and second ends of the second connecting rod 42 and is connected to the housing of the circuit breaker operating mechanism 500. The fixing member 44 and the second connecting rod 42 are rotatably engaged. The second connecting rod 42 swings about the fixing member 44 as the rotation center.

[0129] When the main shaft 501 of the circuit breaker operating mechanism 500 rotates to switch to the closing state, it drives the first connecting rod 41 to rotate. When the first connecting rod 41 rotates, it drives the second connecting rod 42 to rotate around the fixed member 44 through the cooperation of the second connecting rod 42. The second connecting rod 42 then drives the second interlocking rod 21 to move up to the closing position through the third connecting rod 43.

[0130] Specifically, see Figure 12 The first end of the first connecting rod 41 is provided with a transmission hole 411. The operating spindle 501 passes through the transmission hole 411 and is circumferentially limited by the transmission hole 411 to drive the first connecting rod 41 to rotate. Exemplarily, the structure between the operating spindle 501 and the transmission hole 411 is a spline and spline groove fit.

[0131] The second end of the first connecting rod 41 is provided with a connecting shaft 45, and the first end of the second connecting rod 42 is provided with a guide sliding hole 421. The guide sliding hole 421 extends along the length direction of the second connecting rod 42, and the connecting shaft 45 passes through the guide sliding hole 421 and rotates and slides with the guide sliding hole 421, so that the first connecting rod 41 drives the second connecting rod 42 to rotate.

[0132] For example, the second interlocking rod 21 can be a round steel bar, the upper end of which is flattened and provided with a hinge hole for hinged connection with the third connecting rod 43, and the hinge shaft passes through the hinge hole and the third connecting rod 43.

[0133] For example, the fastener 44 may be a pin that passes through the housing of the circuit breaker operating mechanism 500 and is fixed to one side of the operating spindle 501.

[0134] like Figure 5 and Figure 12As shown, the mechanical interlocking device 400 also includes a fifth linkage component 5. The first end of the fifth linkage component 5 abuts against the door interlock plate 31, and the second end of the fifth linkage component 5 is connected to the tripping mechanism 502 of the circuit breaker operating mechanism 500. The fifth linkage component 5 is used to drive the tripping mechanism 502 to lock when the door interlock plate 31 is unlocked from the cable compartment door 300, thereby preventing the circuit breaker operating mechanism 500 from tripping. This ensures that the circuit breaker operating mechanism 500 remains in the closed position during maintenance and repair when the cable compartment door 300 is open, improving operational safety.

[0135] See Figure 12 The tripping mechanism 502 includes a tripping interlocking plate 5021, a tripping drive shaft 5022, a first tripping connecting plate 5023, a second tripping connecting plate 5024, a tripping stop post 5025, a tripping plate 5026, and a guide post 5027. One end of the tripping interlocking plate 5021 is fixedly connected to the tripping drive shaft 5022, and the end of the tripping drive shaft 5022 away from the tripping interlocking plate 5021 is fixedly connected to the first tripping connecting plate 5023. The first tripping connecting plate 5023 is movably connected to the second tripping connecting plate 5024. The guide post 5027 is mounted on a fixed bracket inside the circuit breaker operating mechanism 500 and slides in conjunction with a strip-shaped sliding hole on the second tripping connecting plate 5024. When the tripping interlocking plate 5021 rotates, it can drive the second tripping connecting plate 5024 to slide vertically through the tripping drive shaft 5022 and the first tripping connecting plate 5023. The trip stop 5025 is connected to the end of the second trip connecting plate 5024 away from the first trip connecting plate 5023, and is set approximately horizontally. The trip latch 5026 is rotatably mounted inside the circuit breaker operating mechanism 500, located above the trip stop 5025. When the second trip connecting plate 5024 moves the trip stop 5025 upward, it can prevent the trip latch 5026 from rotating, thereby locking the tripping mechanism 502 and preventing the circuit breaker operating mechanism 500 from tripping.

[0136] Specifically, see Figure 5 and Figure 12The trip interlocking plate 5021 has a strip-shaped hole 5021a. The trip interlocking rod 51 is slidably inserted through the fourth guide hole 701 on the partition plate 700. The first end of the trip interlocking rod 51 abuts against the door interlocking plate 31, and the second end of the trip interlocking rod 51 is movably inserted into the strip-shaped hole 5021a. The first pusher 52 and the second pusher 53 are both provided on the trip interlocking rod 51 and are respectively provided on both sides of the trip interlocking plate 5021. The first pusher 52 and the second pusher 53 are detachably abutted against the trip interlocking plate 5021. The first pusher 52 is located below the second pusher 53. The tripping interlocking rod 51 drives the tripping interlocking latch plate 5021 to rotate through the first pusher 52 and the second pusher 53, thereby locking the tripping mechanism 502. The operating spindle 501 of the circuit breaker operating mechanism 500 cannot rotate to the tripping position, and thus cannot drive the fourth linkage component 4 and the second linkage component 2 to move through the first link 41, so that the second interlocking rod 21 remains locked in the current position.

[0137] Combination Figure 2 and Figure 4 When the door interlock plate 31 moves from the locked position to the unlocked position, it pushes the trip interlock rod 51 upward, so that the first pusher 52 pushes the trip interlock buckle plate 5021 to rotate upward. The trip interlock buckle plate 5021 then drives the trip connecting plate 5024 and the trip stop column 5025 to move upward through the trip transmission shaft 5022 and the trip connecting plate 1 5023 to block the trip buckle plate 5026 from rotating, so that the trip mechanism 502 is locked. At this time, the circuit breaker operating mechanism 500 cannot trip. When the door interlock plate 31 moves from the unlocked position to the locked position, it no longer pushes against the trip interlock rod 51. The trip interlock rod 51 moves down, causing the trip interlock latch plate 5021 to rotate downward, which in turn causes the trip stop column 5025 to move down, releasing the obstruction effect on the trip latch plate 5026. This allows the cable compartment door 300 to perform opening and closing operations on the circuit breaker operating mechanism 500 while it is locked.

[0138] See Figure 7 The door interlock plate 31 includes a first plate segment 312, a second plate segment 313, and a third plate segment 314 connected in sequence, forming a Z-shaped structure. The first plate segment 312 is provided with the aforementioned locking pin 311 and a through-hole 340 passing through the first mounting bracket 34. The second plate segment 313 and the third plate segment 314 are L-shaped, with the third plate segment 314 lower than the first plate segment 312. The first interlocking rod 11 is detachably abutted against the third plate segment 314, and the second interlocking rod 21 and the tripping interlocking rod 51 are detachably abutted against the first plate segment 312. The first interlocking rod 11 in the first closed position is lower than the second interlocking rod 21 in the second tripping position. Setting the third plate segment 314 lower allows for the movement of the first interlocking rod 11.

[0139] like Figure 6 , Figure 14 as well as Figure 15 As shown, the mechanical interlocking device 400 also includes a cable compartment door locking assembly 6, which is linked with the door interlock plate 31 and the latch 401. Specifically, the cable compartment door locking assembly 6 includes a fixing bracket 61, a blocking member 62, and a fourth elastic member 63.

[0140] The fixing bracket 61 is connected to the inner wall of the cable compartment 200, specifically to the bottom surface of the partition plate 700. The blocking member 62 is slidably connected to the fixing bracket 61 and has a blocking position and a clearance position. The fourth elastic member 63 is connected between the fixing bracket 61 and the blocking member 62. When the blocking member 62 is in the clearance position, the locking pin 311 on the door interlock plate 31 can be inserted into the lock hole 402, thereby locking the door interlock plate 31 with the cable compartment door 300, and the blocking member 62 abuts against the lock tongue 401, while the fourth elastic member 63 is in a compressed and energy-storing state. When the blocking member 62 is in the blocking position, it is located between the locking pin 311 and the lock hole 402, thereby preventing the locking pin 311 from being inserted into the lock hole 402.

[0141] When the three-position switch operating mechanism 600 is in the grounded state and the circuit breaker operating mechanism 500 is in the closed state, the door interlock plate 31 switches to the unlocked position, the locking pin 311 disengages from the lock hole 402, and the cable compartment door 300 can be opened. After the cable compartment door 300 is opened, the latch 401 no longer abuts against the blocking member 62. The blocking member 62 slides to the blocking position under the elastic force of the fourth elastic member 63, which blocks the locking pin 311 from below, thus preventing the door interlock plate 31 from falling. This prevents the first linkage component 1 from exiting the grounded position and the second linkage component 2 from exiting the closed position, ensuring that the circuit breaker operating mechanism 500 remains closed and the three-position switch operating mechanism 600 remains grounded during the opening of the cable compartment door 300. When the cable compartment door 300 is closed, the latch 401 pushes against the blocking member 62, causing the blocking member 62 to return to the avoidance position, and the locking pin 311 can be reinserted into the lock hole 402.

[0142] More specifically, see Figure 14 and Figure 15The fixed frame 61 is provided with a sliding groove 6120. The blocking member 62 includes a sliding plate 621, a support plate 622, and a baffle 623. The sliding plate 621 slidably passes through the sliding groove 6120 and is connected to the fourth elastic member 63. The baffle 623 is connected to the sliding plate 621 through the support plate 622 and is spaced apart from the sliding plate 621. The support plate 622 has a protruding push post 624 on the side facing the latch 401. The baffle 623 is used to block the latch 311, and the push post 624 is detachably abutted against the latch 401. Through the sliding cooperation between the sliding plate 621 and the sliding groove 6120, the movement of the blocking member 62 can be guided. The baffle 623 blocks the latch 311, which increases the contact area with the latch 311, ensures the stability of the block, and ensures that the latch 311 will not be inserted into the lock hole 402. A push post 624 is protruding on the support plate 622 to abut against the latch 401, which can shorten the extension length of the latch 401 and avoid the latch 401 from having poor resistance to bending deformation due to excessive length. In this embodiment, the length of the latch 401 is moderate and will not be excessively deformed after repeatedly pushing against the push post 624 of the blocking member 62.

[0143] Further, the fixing frame 61 includes a fixing carrier plate 611 and a positioning plate 612. The fixing carrier plate 611 includes a U-shaped frame 6111 and fourth mounting plates 6112 disposed at both ends of the U-shaped frame 6111. The U-shaped frame 6111 and the two fourth mounting plates 6112 form a Z-shaped structure. The fourth mounting plates 6112 are connected to the partition plate 700 by fasteners such as screws. The U-shaped frame 6111 and the partition plate 700 enclose an installation space, within which the positioning plate 612 and the blocking member 62 are located. The positioning plate 612 includes a fourth connecting plate 6121 and a positioning frame 6122 disposed on the fourth connecting plate 6121. The fourth connecting plate 6121 is attached to and connected to the bottom of the U-shaped frame 6111. The positioning frame 6122 encloses the aforementioned sliding groove 6120. One end of the fourth elastic member 63 is connected to the positioning frame 6122, and the other end is connected to the sliding plate 621. The slide plate 621 slides along the positioning frame 6122. An avoidance notch 625 is also provided on the slide plate 621 to avoid interference between the fourth elastic member 63 and the slide plate 621. For example, the fourth elastic member 63 is a spring, with one end connected to a connection hole on the positioning frame 6122 and the other end connected to a connection hole on the slide plate 621.

[0144] In summary, the mechanical interlocking device 400 interlocking with the cable compartment door 300 provided in this embodiment has the following functions: Only when the circuit breaker operating mechanism 500 is closed and the three-position switch operating mechanism 600 is grounded, the door interlock plate 31 disengages from the lock hole 402, allowing the cable compartment door 300 to open normally. After the cable compartment door 300 is fully opened outwards, the blocking action of the blocking member 62 of the cable compartment door locking assembly 6 prevents the circuit breaker operating mechanism 500 from exiting the closed state and the three-position switch operating mechanism 600 from exiting the grounded state. After the cable compartment door 300 is closed and locked, the circuit breaker operating mechanism 500 can normally open and close, and the three-position switch operating mechanism 600 can close, and the operation of the main operating shaft 501 of the circuit breaker operating mechanism 500 and the operation of the three-position switch operating mechanism 600 do not interfere with each other.

[0145] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A mechanical interlocking device for a switchgear, the switchgear comprising a mechanism compartment (100), a cable compartment (200), and a cable compartment door (300), wherein the mechanism compartment (100) is provided with a circuit breaker operating mechanism (500) and a three-position switch operating mechanism (600), characterized in that, The mechanical interlocking device includes: The first linkage component (1) includes a first interlocking rod (11) movably disposed in the switch cabinet, and the first end of the first interlocking rod (11) is connected to the three-position switch operating mechanism (600). The second linkage component (2) includes a second interlocking rod (21) movably disposed in the switch cabinet, the first end of the second interlocking rod (21) being connected to the circuit breaker operating mechanism (500); The third linkage component (3) includes a door interlock plate (31) and a first elastic element (32). The door interlock plate (31) is movably connected to the switch cabinet through the first elastic element (32) and is locked or unlocked with the cable compartment door (300). The second end of the first interlock rod (11) and the second end of the second interlock rod (21) are both in contact with or separate from the door interlock plate (31). The door interlock plate (31) is used to lock the cable compartment door (300) under the pushing action of the first interlock rod (11) or the second interlock rod (21), and drive the first elastic element (32) to deform elastically; when the circuit breaker operating mechanism (500) is closed and the three-position switch operating mechanism (600) is grounded, the door interlock plate (31) unlocks the cable compartment door (300) under the elastic force of the first elastic element (32).

2. The mechanical interlocking device for the switchgear according to claim 1, characterized in that, The third linkage component (3) also includes a guide (33) and a first mounting bracket (34); The first mounting bracket (34) is connected to the inner wall of the cable chamber (200) and is provided with a through-hole (340), and the door interlock plate (31) is movably inserted through the through-hole (340); The guide member (33) is slidably inserted through the first mounting bracket (34) and connected to the door interlock plate (31); the first elastic member (32) is telescopically located between the door interlock plate (31) and the first mounting bracket (34).

3. The mechanical interlocking device for the switchgear according to claim 1, characterized in that, The first linkage component (1) further includes a first stop (12), a second elastic component (13), and a traction component (14); the mechanical interlocking device further includes a second mounting bracket (7) and a support component (8) connected to the inner wall of the switch cabinet; The first interlocking rod (11) is slidably inserted into the second mounting bracket (7); The first stop (12) is connected to the first interlocking rod (11), and the second elastic member (13) is sleeved on the first interlocking rod (11) and is telescopically located between the first stop (12) and the second mounting bracket (7). The support member (8) is provided with a guide hole (81), and the traction member (14) is movably inserted through the guide hole (81). One end of the traction member (14) is connected to the first interlocking rod (11), and the other end is connected to the three-position switch operating mechanism (600). The traction member (14) is used to pull the first interlocking rod (11) when the three-position switch operating mechanism (600) is switched to the grounding state.

4. The mechanical interlocking device for the switchgear according to claim 1, characterized in that, The second linkage component (2) also includes a second stop (22) and a third elastic component (23); the mechanical interlocking device also includes a third mounting bracket (9) disposed on the inner wall of the switch cabinet; The second interlocking rod (21) is slidably inserted into the third mounting bracket (9); The second stop (22) is connected to the second interlocking rod (21), and the third elastic member (23) is sleeved on the second interlocking rod (21) and is telescopically located between the third mounting bracket (9) and the second stop (22).

5. The mechanical interlocking device for the switchgear according to claim 4, characterized in that, It also includes a fourth linkage component (4), which includes a first link (41), a second link (42), a third link (43), and a fixing member (44); The first end of the first link (41) is connected to the operating spindle (501) of the circuit breaker operating mechanism (500) and is used to rotate under the drive of the operating spindle (501); the second end of the first link (41) is rotatably and slidably connected to the first end of the second link (42); the second end of the second link (42) is rotatably connected to the first end of the third link (43), and the second end of the third link (43) is rotatably connected to the second end of the second interlocking rod (21); The fixing member (44) passes between the first end and the second end of the second connecting rod (42) and is connected to the housing of the circuit breaker operating mechanism (500). The fixing member (44) is rotatably engaged with the second connecting rod (42).

6. The mechanical interlocking device for the switchgear according to any one of claims 1-5, characterized in that, The mechanical interlocking device also includes a fifth linkage component (5); The first end of the fifth linkage component (5) abuts against the door interlock plate (31), and the second end of the fifth linkage component (5) is connected to the tripping mechanism (502) of the circuit breaker operating mechanism (500). The fifth linkage component (5) is used to drive the tripping mechanism (502) to lock when the door interlock plate (31) and the cable room door (300) are unlocked.

7. The mechanical interlocking device for the switchgear according to claim 6, characterized in that, The fifth linkage component (5) includes a tripping interlocking rod (51), a first pushing member (52) and a second pushing member (53); the tripping mechanism (502) includes a tripping interlocking buckle plate (5021), and the tripping interlocking buckle plate (5021) is provided with a strip hole (5021a); The tripping interlock rod (51) is movably disposed inside the switch cabinet. The first end of the tripping interlock rod (51) abuts against the door interlock plate (31), and the second end of the tripping interlock rod (51) is movably inserted through the strip hole (5021a). The first pusher (52) and the second pusher (53) are both provided on the trip interlock rod (51) and are respectively provided on both sides of the trip interlock plate (5021). The first pusher (52) and the second pusher (53) can be detachably abutted against the trip interlock plate (5021). The tripping interlocking rod (51) drives the tripping interlocking buckle plate (5021) to rotate through the first pusher (52) and the second pusher (53), thereby locking the tripping mechanism (502).

8. The mechanical interlocking device for the switchgear according to any one of claims 1-5, characterized in that, The cable compartment door (300) is connected to a latch (401), and the latch (401) is provided with a lock hole (402); the door interlock plate (31) is provided with a lock pin (311), and the lock pin (311) is inserted into or disengaged from the lock hole (402) to lock or unlock the door interlock plate (31) and the cable compartment door (300); The mechanical interlocking device also includes a cable compartment door locking assembly (6), which includes a fixing frame (61), a blocking member (62), and a fourth elastic member (63). A partition plate (700) is provided between the mechanism chamber (100) and the cable chamber (200), the fixing frame (61) is connected to the partition plate (700), the blocking member (62) is slidably connected to the fixing frame (61) and has a blocking position and a clearance position, and the fourth elastic member (63) is connected between the fixing frame (61) and the blocking member (62); When the blocking member (62) is in the avoidance position, the locking pin (311) is inserted into the lock hole (402), and the blocking member (62) abuts against the locking tongue (401); when the blocking member (62) is in the blocking position, it is located between the locking pin (311) and the lock hole (402).

9. The mechanical interlocking device for the switchgear according to claim 8, characterized in that, The fixed frame (61) is provided with a sliding groove (6120), and the blocking member (62) includes a sliding plate (621), a support plate (622) and a baffle (623); The slide plate (621) slidably passes through the groove (6120) and is connected to the fourth elastic member (63); The baffle (623) is connected to the slide plate (621) through the support plate (622) and is spaced apart from the slide plate (621). The support plate (622) has a push post (624) protruding on the side facing the latch (401). The baffle (623) is used to block the latch (311), and the push post (624) is detachably abutted against the latch (401).

10. A switch cabinet, characterized in that, It includes an equipment room (100), a cable room (200), an equipment room door, a cable room door (300), a circuit breaker operating mechanism (500), a three-position switch operating mechanism (600), and a mechanical interlocking device for the switch cabinet as described in any one of claims 1-9; The mechanism room door is used to cover the entrance of the mechanism room (100), and the cable room door (300) is used to cover the entrance of the cable room (200); the circuit breaker operating mechanism (500) and the three-position switch operating mechanism (600) are both located in the mechanism room (100) and are linked to the cable room door (300) through the mechanical interlocking device.

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