Five-prevention program mechanical locking device of electric appliance cabinet and gas insulated switchgear thereof

Abstract

The invention discloses a five-prevention program mechanical locking device of an electric appliance cabinet and a gas insulated switchgear thereof. The device comprises an interlocking support; the switching-on locking plate is movably arranged on the interlocking support, and the switching-on locking plate locks a switching-on switch of the circuit breaker at the first position; the closing locking plate unlocks the closing switch at the second position; a closing switch of the circuit breaker in the opening state is located on a path of the closing locking plate moving from the second position to the first position; the opening locking plate is linked with the closing locking plate; the switching-on locking plate locks the switching-off electromagnet when the switching-on locking plate is at the first position, and unlocks the switching-off electromagnet when the switching-on locking plate is at the second position; the two-lock one-key program lock comprises a first program lock for locking the rear door and a second program lock for driving the closing locking plate to move; when the second program lock is locked, the closing locking plate is located at a first position; and when the program lock is unlocked, the closing locking plate is located at the second position. The problem that long-distance mechanical transmission accuracy is poor is solved.

Description

Technical Field

[0001] This application relates to the field of switchgear technology, and in particular to a five-proof mechanical interlocking device for electrical cabinets and its gas-insulated switchgear. Background Technology

[0002] Because medium-voltage gas-insulated metal-enclosed switchgear (gas-insulated switchgear) completely seals all high-voltage circuits inside the gas chamber, it is generally considered relatively safe by the industry both domestically and internationally. This mechanical five-proof interlocking function is often only designed for air-insulated switchgear and is not designed for use with this set of five-proof grounding interlocking. In most cabinet design schemes, the cable compartment is located at the rear of the cabinet, which is relatively far from the three-position switchgear and the circuit breaker. Some manufacturers in the industry use steel wire or mechanical structural components for long-distance mechanical transmission interlocking. However, long-distance mechanical transmission interlocking using steel wire and mechanical structural components is complex, technically difficult, and also has issues with service life and the accuracy of interlocking transmission.

[0003] Therefore, for products where the cable compartment is located behind the gas-insulated switchgear, how to achieve precise interlocking of long-distance mechanical transmission is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this application is to provide a five-proof mechanical interlocking device for electrical cabinets and its gas-insulated switchgear, which solves the problem of poor accuracy in long-distance mechanical transmission.

[0005] To achieve the above objectives, this application provides a five-proof mechanical interlocking device for electrical cabinets, comprising:

[0006] Interlocking support, fixedly installed inside the electrical cabinet;

[0007] A closing interlocking plate is movably mounted on the interlocking support. The closing interlocking plate has a first position and a second position. In the first position, the closing interlocking plate locks the closing switch of the circuit breaker to restrict opening. In the second position, the closing interlocking plate unlocks the closing switch. In the open state, the closing switch of the circuit breaker is located on the path of the closing interlocking plate moving from the second position to the first position.

[0008] The tripping interlocking plate is linked with the closing interlocking plate; when the closing interlocking plate is in the first position, the tripping interlocking plate locks the tripping electromagnet; when the closing interlocking plate is in the second position, the tripping interlocking plate unlocks the tripping electromagnet.

[0009] The two-lock, one-key program lock includes a first program lock that locks the rear door and a second program lock that is located on the interlocking support and drives the closing locking plate to move; when the second program lock is locked, the closing locking plate is in a first position; when the second program lock is unlocked, the closing locking plate is in a second position.

[0010] Optionally, the interlocking support is provided with a support plate, and the support plate is provided with a sliding groove, and the closing interlocking plate is slidably disposed in the sliding groove;

[0011] One end of the closing interlocking plate extends out of the slide groove and locks the closing switch at the first position; the other end of the closing interlocking plate is connected to the lock head of the second program lock, and the movement direction of the lock head is consistent with the movement direction of the closing interlocking plate, so as to drive the closing interlocking plate to move between the first position and the second position.

[0012] Optionally, the closing interlocking plate is provided with a drive shaft extending out of the support plate, and the support plate is provided with a rotating shaft and a clearance hole for the drive shaft to move with the closing interlocking plate.

[0013] The middle part of the tripping interlocking plate is connected to the rotating shaft, one end of which is movably connected to the drive shaft and rotates around the rotating shaft under the drive of the drive shaft; the other end is used to lock or unlock the tripping electromagnet.

[0014] Optionally, one end of the tripping locking plate is provided with an oblong hole that movably engages with the drive shaft, and the other end of the tripping locking plate is rotated to a position to lock or unlock the tripping electromagnet under the drive of the closing locking plate.

[0015] Optionally, the support plate includes a support back plate fixedly disposed on the interlocking support and a cover plate fixedly disposed on the support back plate, with two opposing partitions sandwiched between the support back plate and the cover plate, and a groove of a predetermined length formed between the partitions.

[0016] Optionally, the bottom of the closing interlocking plate is provided with a U-shaped frame, one U-shaped arm of the U-shaped frame is connected to the closing interlocking plate, the two U-shaped arms of the U-shaped frame are arranged opposite to each other in the direction of movement of the closing interlocking plate, the second program lock is located inside the U-shaped frame, and the two ends of the lock head respectively abut against the two U-shaped arms of the U-shaped frame.

[0017] Optionally, the closing switch includes:

[0018] The closing lever is a screw head integrated with the circuit breaker, which extends and retracts as the circuit breaker opens and closes.

[0019] The connector has nuts at both ends, and the nut at one end is connected to the closing lever;

[0020] Adjusting bolt, and nut located at the other end of the connector;

[0021] Wherein, the closing interlocking plate restricts the adjusting bolt at the first position to limit the extension of the closing switch; when the circuit breaker is in the open state, the adjusting bolt restricts the closing interlocking plate from moving from the second position to the first position.

[0022] Optionally, the interlocking support is provided with a clearance groove at the top, the U-shaped bottom of the U-shaped frame passes through the clearance groove, and the two U-shaped arms move on the upper and lower sides of the clearance groove respectively.

[0023] Optionally, the U-shaped frame has an internal mounting plate that is fixedly connected to the interlocking support. The second program lock is mounted on the mounting plate and located on the lower side of the mounting plate. The top of the lock head passes through the mounting plate and is connected to a U-shaped arm of the U-shaped frame.

[0024] A gas-insulated switchgear includes a cabinet, a circuit breaker, and a five-proof mechanical interlocking device for the electrical cabinet as described in any of the preceding claims.

[0025] The beneficial effect of this application is that it adopts a set of two-lock, one-key program locks. The first program lock locks the rear door of the electrical cabinet, and the second program lock cooperates with the closing lock plate and the opening lock plate to form an interlocking relationship with the circuit breaker mechanism. Utilizing the program lock's built-in logic, the key can only be pulled out to unlock the first program lock of the rear door when the second program lock is locked; conversely, the key can only be pulled out to unlock the second program lock when the first program lock is locked.

[0026] The second program lock drives the closing interlock plate to move. When the second program lock is locked, the closing interlock plate moves to the first position. At the same time, the opening interlock plate locks the opening electromagnet. The circuit breaker opens and is locked, so it cannot be operated. That is, when the second program lock is locked, the circuit breaker is in the closed state. At this time, the key of the second program lock can be pulled out, and the first program lock can be unlocked to open the back door.

[0027] When the second program lock is unlocked, the closing interlock plate is in the second position, and at the same time the opening interlock plate unlocks the opening electromagnet, so the circuit breaker can open. However, at this time, the key of the second program lock cannot be removed, so the first program lock cannot be unlocked and the back door cannot be opened.

[0028] When the circuit breaker is in the open state, the closing switch of the circuit breaker is located on the path of the closing interlocking plate moving from the second position to the first position. At this time, the closing interlocking plate cannot reach the first position, so the second program lock cannot be locked. The key of the second program lock cannot be removed, so the first program lock cannot be unlocked and the back door cannot be opened.

[0029] It can be seen that the second program lock key can only be removed to unlock the back door when the circuit breaker is in the closed state. Simultaneously, removing the second program lock key locks the tripping electromagnet, preventing the circuit breaker from tripping and thus preventing the system from being de-grounded. When the circuit breaker is in the open state, the reverse locking of the second program lock fails, the key cannot be removed from the second program lock, and the back door cannot be unlocked. This method improves the interlocking accuracy of long-distance mechanical transmission interlocking schemes, enhances the five-proof functions of gas-insulated switchgear, prevents accidental entry into energized compartments, and improves product safety performance. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0031] Figure 1 A perspective view of the five-proof mechanical interlocking device for electrical cabinets provided in the embodiments of this application;

[0032] Figure 2 Another perspective view of the five-proof mechanical interlocking device for electrical cabinets provided in the embodiments of this application;

[0033] Figure 3 This is a schematic diagram of the interlocking support structure provided in the embodiments of this application;

[0034] Figure 4 This is a schematic diagram of the support plate structure provided in the embodiments of this application;

[0035] Figure 5 This is a schematic diagram of the support plate provided in an embodiment of this application from another perspective.

[0036] Figure 6 This is a schematic diagram of the connection structure between the closing interlocking plate and the U-shaped frame provided in the embodiments of this application;

[0037] Figure 7 This is a cross-sectional view of the closing switch structure provided in an embodiment of this application;

[0038] Figure 8 This is a schematic diagram of the second procedure lock locking structure provided in the embodiments of this application;

[0039] Figure 9 This is a schematic diagram of the structure of the second program lock unlocking according to an embodiment of this application;

[0040] Figure 10 This is a side view of the circuit breaker in the second position when the circuit breaker is open and the closing interlocking plate is in the second position, as provided in the embodiment of this application.

[0041] Figure 11 This is a front view of the circuit breaker in the second position when the circuit breaker is open and the closing interlocking plate is in the second position, as provided in the embodiment of this application.

[0042] Figure 12 This is a side view of the circuit breaker in the embodiment of this application when it is closed and the closing interlocking plate is in the second position;

[0043] Figure 13 This is a side view of the circuit breaker in the embodiment of this application when it is closed and the closing interlocking plate is in the first position.

[0044] Figure 14 This is a front view of the circuit breaker in the embodiment of this application when it is closed and the closing interlocking plate is in the first position.

[0045] In the diagram: 1-Interlock support; 2-Second program lock; 3-Support plate; 4-Closing interlock plate; 5-Closing switch; 6-Opening interlock plate; 7-Opening electromagnet; 8-U-shaped frame;

[0046] 11-Avoidance groove; 12-Mounting plate;

[0047] 21-Lock;

[0048] 31-Support back plate; 32-Baffle; 33-Cover plate; 34-Slide groove; 311-Allowing hole; 312-Rotating shaft;

[0049] 41-Drive shaft;

[0050] 51-Closing lever; 52-Connector; 53-Adjusting bolt;

[0051] 61- Waist-shaped hole. Detailed Implementation

[0052] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0053] It should be noted that in this embodiment, the orientation or positional relationship indicated by terms such as "upper," "lower," "front," and "rear" is based on the orientation or positional relationship shown in the accompanying drawings. It is used only for the convenience of describing this application and for simplifying the description, and does 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, it should not be construed as a limitation of this application. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0055] Please refer to Figure 1 and Figure 3 This embodiment provides a five-proof programmable mechanical interlocking device for electrical cabinets. The device includes an interlocking support 1, a closing interlocking plate 4, a closing interlocking plate 6, and a two-lock, one-key programmable lock. The interlocking support 1 serves as the mounting base for the entire device and needs to be fixedly installed inside the electrical cabinet. It also provides a stable installation position and support for the closing interlocking plate 4, the opening interlocking plate 6, and the programmable lock. The closing interlocking plate 4 is movably mounted on the interlocking support 1 and, driven by the programmable lock, can move at least between a first position and a second position.

[0056] The two-lock, one-key program lock includes a first program lock that locks the rear door and a second program lock 2 that is located on the interlocking support 1 and drives the closing locking plate 4 to move. Only when the first program lock is locked can the key be taken out from the first program lock to unlock the second program lock 2; conversely, only when the second program lock 2 is locked can the key be taken out to unlock the first program lock, ensuring that at most one program lock is unlocked at any given time.

[0057] When the second program lock 2 switches from the unlocked to the locked state, the closing interlock plate 4 can be driven to move from the second position to the first position. Simultaneously, because the opening interlock plate 6 is linked to the closing interlock plate 4, the opening interlock plate 6 moves from the position of unlocking the opening solenoid 7 to the position of locking the opening solenoid valve. When the second program lock 2 is in the locked state, the closing interlock plate 4 is in the first position, and the opening interlock plate 6 is in the position of locking the opening solenoid valve; conversely, the closing interlock plate 4 is in the second position, and the opening interlock plate 6 is in the position of unlocking the opening solenoid valve.

[0058] Based on this, when the closing interlock plate 4 reaches the first position, please refer to... Figure 13 and Figure 14The closing interlock plate 4 is located on the movement path of the closing switch 5 of the circuit breaker. At the same time, the opening interlock plate 6 locks the opening electromagnet 7. The circuit breaker is locked when it opens and cannot be operated. That is, when the second program lock 2 is locked, the circuit breaker is in the closed state. At this time, the key of the second program lock 2 can be pulled out, and the first program lock can be unlocked to open the back door.

[0059] When the closing interlock plate 4 reaches the second position, please refer to... Figure 12 When the closing interlock plate 4 unlocks the closing switch 5, the opening interlock plate 6 unlocks the opening electromagnet 7, and the circuit breaker can open. However, at this time, the key of the second program lock 2 cannot be removed, so the first program lock cannot be unlocked and the back door cannot be opened.

[0060] In addition, when the circuit breaker is in the open state, please refer to... Figure 10 and Figure 11 The closing switch 5 is located on the path of the closing interlocking plate 4 moving from the second position to the first position, so that the closing interlocking plate 4 cannot reach the first position. Therefore, the second program lock 2 cannot be locked, the key of the second program lock 2 cannot be removed, and the first program lock cannot be unlocked, and the back door cannot be opened.

[0061] As can be seen, this application employs a two-lock, one-key program lock system. The first program lock secures the rear door of the electrical cabinet, while the second program lock 2, in conjunction with the closing interlock plate 4 and the opening interlock plate 6, forms an interlocking relationship with the circuit breaker mechanism. Only when the circuit breaker is in the closed state can the key to the second program lock 2 be removed to unlock the rear door. Simultaneously, removing the key to the second program lock 2 locks the opening electromagnet 7, preventing the circuit breaker from opening and thus preventing the system from being de-grounded. When the circuit breaker is in the open state, the reverse locking mechanism of the second program lock 2 fails to engage, the key cannot be removed from the second program lock 2, and the rear door cannot be unlocked. This method improves the interlocking accuracy of long-distance mechanical transmission interlocking schemes, enhances the five-proof functions of gas-insulated switchgear, prevents accidental entry into energized compartments, and improves product safety performance.

[0062] Regarding the locking of the rear door by the first program lock installed on the rear door, this embodiment will not describe it in detail. Its function is that the key must be inserted into the first program lock to unlock the first program lock and unlock the rear door. At this time, the key cannot be removed. Therefore, the second program lock 2 cannot be unlocked and remains in the locked state. The tripping electromagnet 7 is locked and the circuit breaker cannot trip.

[0063] A support plate 3 is provided on the interlocking support 1. Please refer to... Figure 1 The support plate 3 is provided with a sliding groove 34, and the closing interlocking plate 4 is slidably disposed in the sliding groove 34 and slides along the length of the sliding groove 34. One end of the closing interlocking plate 4 extends out of the sliding groove 34 and locks the closing switch 5 at the first position.

[0064] The other end of the closing interlock plate 4 is connected to the lock head 21 of the second program lock 2. The movement direction of the lock head 21 is the same as the movement direction of the closing interlock plate 4, so as to drive the closing interlock plate 4 to move between the first position and the second position. The second program lock 2 is as follows: Figure 8 and Figure 9 As shown, Figure 8 This is a schematic diagram of the second program lock 2 in the locked state, with one end of its lock head 21 extended and the other end retracted, allowing the key to be removed; Figure 9 This is a schematic diagram of the second program lock 2 in the unlocked state, with one end of its lock head 21 retracted and the other end extended, making it impossible to remove the key.

[0065] The second program lock 2 is in Figure 8 In this state, the closing interlock plate 4 can be placed in the first position; Figure 9 In this state, the closing interlock plate 4 can be placed in the second position.

[0066] The closing interlock plate 4 is equipped with a drive shaft 41 that extends out of the support plate 3. Please refer to [reference needed]. Figure 2 The support plate 3 is provided with a clearance hole 311 for the drive shaft 41 to move with the closing locking plate 4. That is, under the action of the closing locking plate 4, the drive shaft 41 can be driven to move synchronously. The support plate 3 is also provided with a rotating shaft 312. The middle part of the opening locking plate 6 is connected to the rotating shaft 312, and one end of it is movably connected to the drive shaft 41. Under the drive of the drive shaft 41, the opening locking plate 6 can be driven to rotate around the rotating shaft 312. The other end of the opening locking plate 6 is used to lock or unlock the opening electromagnet 7.

[0067] Specifically, please refer to Figure 2 One end of the trip interlocking plate 6 is provided with an oblong hole that movably engages with the drive shaft 41, satisfying the linkage between linear and rotary motion. Under the driving action of the drive shaft 41, the trip interlocking plate 6 rotates upward with the shaft 312 as the axis and uses the lever rotation principle. The end of the trip interlocking plate 6 with the oblong hole rotates upward and the other end rotates downward, thereby driving the trip interlocking plate 6 to rotate and lock the trip electromagnet 7, realizing the trip interlocking of the circuit breaker. Conversely, the trip interlocking plate 6 rotates to unlock the trip electromagnet 7, realizing the trip interlocking of the circuit breaker.

[0068] Please refer to Figure 4 and Figure 5 The support plate 3 includes a support back plate 31 fixedly mounted on the interlocking support 1 and a cover plate 33 fixedly mounted on the support back plate 31. Two opposing partitions 32 are sandwiched between the support back plate 31 and the cover plate 33. A groove 34 of a preset length is formed between the partitions 32. Under the guidance of the groove 34, the closing locking plate 4 can move stably along the length direction of the groove 34.

[0069] In addition, a U-shaped frame 8 is provided at the bottom of the closing interlock plate 4, please refer to... Figure 6One U-shaped arm of the U-shaped frame 8 is connected to the closing interlocking plate 4. The two U-shaped arms of the U-shaped frame 8 are arranged opposite to each other in the direction of movement of the closing interlocking plate 4. The second program lock 2 is located inside the U-shaped frame 8, and the two ends of the lock head 21 abut against the two U-shaped arms of the U-shaped frame 8 respectively, so that when the lock head 21 moves along the axial direction, it can drive the U-shaped frame 8 to move upward or downward, thereby driving the closing interlocking plate 4 to move between the first position and the second position.

[0070] Please refer to Figure 7 The closing switch 5 includes a closing rod 51, a connecting piece 52, and an adjusting bolt 53. The closing rod 51 is a screw head integrated into the circuit breaker, which extends and retracts with the opening and closing of the circuit breaker. The connecting piece 52 connects the closing rod 51 and the adjusting bolt 53, serving as a displacement transmission component between them. It is made of two nuts and two strips welded together. The connecting piece 52 has nuts at both ends; one nut connects to the closing rod 51, and the other nut connects to the adjusting bolt 53.

[0071] The closing interlocking plate 4 restricts the adjusting bolt 53 at the first position to limit the extension of the closing switch 5; when the circuit breaker is in the open state, the adjusting bolt 53 restricts the movement of the closing interlocking plate 4 from the second position to the first position. Furthermore, the length of the stop can be adjusted by rotating the adjusting bolt 53 according to its actual dimensions after installation, thereby effectively locking the closing interlocking plate 4 when it moves from the second position to the first position.

[0072] Please refer to Figure 3 An avoidance groove 11 is provided at the top of the interlocking support 1, and the U-shaped bottom of the U-shaped frame 8 passes through the avoidance groove 11. The two U-shaped arms move on the upper and lower sides of the avoidance groove 11 respectively. Furthermore, the U-shaped frame 8 is provided with a mounting plate 12 that is fixedly connected to the interlocking support 1. The second program lock 2 is located on the mounting plate 12 and is located on the lower side of the mounting plate 12. The top of the lock head 21 passes through the mounting plate 12 and is connected to one of the U-shaped arms of the U-shaped frame 8.

[0073] Based on the above embodiment, when the circuit breaker is in the open state, the closing lever 51 of the circuit breaker is not retracted, and at this time it is in the position as follows: Figure 10 In the current state, adjusting bolt 53 blocks the closing interlock plate 4 from moving upward, and the closing interlock plate 4 cannot reach the first position. At this time, the second program lock 2 cannot rotate, the second program lock 2 cannot change from the unlocked state to the locked state, the key cannot be removed from the second program lock 2, the first program lock of the rear door cannot be unlocked, and the rear door cannot be opened.

[0074] When the circuit breaker is closed, the closing lever 51 of the circuit breaker is retracted, and at this time it is in the position as follows: Figure 12When the adjusting bolt 53 is released from its obstruction of the closing interlocking plate 4, the key of the second program lock 2 can be rotated, changing it from the unlocked state to the locked state. The lock head 21 of the second program lock 2 extends upward, simultaneously pushing the U-shaped frame 8 upward, causing the closing interlocking plate 4 to move upward. At the same time, one end of the opening interlocking plate 6 with the oblong hole moves upward, and the corresponding other end moves downward, locking the opening electromagnet 7 and realizing the circuit breaker opening interlock. At this time, the key of the second program lock 2 can be removed to unlock the back door, and the circuit breaker remains in the closed state and cannot be opened.

[0075] This application also provides a gas-insulated switchgear, which includes a cabinet, a circuit breaker, and a mechanical interlocking device with five protective functions as described above. This device can improve the five protective functions of the gas-insulated metal-enclosed switchgear. Maintenance and other operations can only be performed by opening the cable compartment rear door when the gas-insulated switchgear circuit is grounded, i.e., when the circuit breaker is closed. Furthermore, opening the cable compartment rear door does not release the grounding state, preventing circuit breaker tripping operations and preventing accidental entry into energized areas, thus improving product safety performance.

[0076] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0077] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A five-proof programmable mechanical interlocking device for an electrical cabinet, characterized in that, include: Interlocking support (1) is fixedly installed inside the electrical cabinet; A closing interlock plate (4) is movably mounted on the interlock support (1). The closing interlock plate (4) has a first position and a second position. In the first position, the closing interlock plate (4) locks the closing switch (5) of the circuit breaker to restrict the opening. In the second position, the closing interlock plate (4) unlocks the closing switch (5). In the open state, the closing switch (5) of the circuit breaker is located on the path of the closing interlock plate (4) moving from the second position to the first position. The tripping interlocking plate (6) is linked with the closing interlocking plate (4); when the closing interlocking plate (4) is in the first position, the tripping interlocking plate (6) locks the tripping electromagnet (7); when the closing interlocking plate (4) is in the second position, the tripping interlocking plate (6) unlocks the tripping electromagnet (7). The two-lock, one-key program lock includes a first program lock that locks the rear door and a second program lock (2) that is located on the interlocking support (1) and drives the closing locking plate (4) to move; when the second program lock (2) is locked, the closing locking plate (4) is in the first position; when the second program lock (2) is unlocked, the closing locking plate (4) is in the second position.

2. The five-proof programmable mechanical interlocking device for electrical cabinets according to claim 1, characterized in that, The interlocking support (1) is provided with a support plate (3), and the support plate (3) is provided with a sliding groove (34), and the closing interlocking plate (4) is slidably disposed in the sliding groove (34); One end of the closing interlock plate (4) extends out of the slide groove (34) and locks the closing switch (5) at the first position; the other end of the closing interlock plate (4) is connected to the lock head (21) of the second program lock (2), and the movement direction of the lock head (21) is consistent with the movement direction of the closing interlock plate (4) to drive the closing interlock plate (4) to move between the first position and the second position.

3. The five-proof programmable mechanical interlocking device for electrical cabinets according to claim 2, characterized in that, The closing interlock plate (4) is provided with a drive shaft (41) extending out of the support plate (3), and the support plate (3) is provided with a rotating shaft (312) and a clearance hole (311) for the drive shaft (41) to move with the closing interlock plate (4). The middle part of the tripping locking plate (6) is connected to the rotating shaft (312), one end of which is movably connected to the drive shaft (41) and rotates around the rotating shaft (312) under the drive of the drive shaft (41); the other end is used to lock or unlock the tripping electromagnet (7).

4. The five-proof programmable mechanical interlocking device for electrical cabinets according to claim 3, characterized in that, One end of the tripping locking plate (6) is provided with a waist-shaped hole that is movably engaged with the drive shaft (41), and the other end of the tripping locking plate (6) is rotated to the position of locking or unlocking the tripping electromagnet (7) under the drive of the closing locking plate (4).

5. The five-proof programmable mechanical interlocking device for electrical cabinets according to claim 2, characterized in that, The support plate (3) includes a support back plate (31) fixedly disposed on the interlocking support (1) and a cover plate (33) fixedly disposed on the support back plate (31). Two opposing partitions (32) are sandwiched between the support back plate (31) and the cover plate (33), and a groove (34) of a preset length is formed between the partitions (32).

6. The five-proof programmable mechanical interlocking device for electrical cabinets according to claim 2, characterized in that, The bottom of the closing interlock plate (4) is provided with a U-shaped frame (8). One U-shaped arm of the U-shaped frame (8) is connected to the closing interlock plate (4). The two U-shaped arms of the U-shaped frame (8) are arranged opposite to each other in the direction of movement of the closing interlock plate (4). The second program lock (2) is located inside the U-shaped frame (8), and the two ends of the lock head (21) abut against the two U-shaped arms of the U-shaped frame (8) respectively.

7. The five-proof programmable mechanical interlocking device for electrical cabinets according to claim 1, characterized in that, The closing switch (5) includes: The closing lever (51) is a screw head that comes with the circuit breaker. It extends and retracts as the circuit breaker opens and closes. The connector (52) has nuts at both ends, and the nut at one end is connected to the closing lever (51); Adjusting bolt (53), and nut located at the other end of the connector (52); Wherein, the closing interlock plate (4) restricts the adjusting bolt (53) at the first position to restrict the closing switch (5) from extending; when the circuit breaker is in the open state, the adjusting bolt (53) restricts the closing interlock plate (4) from moving from the second position to the first position.

8. The five-proof programmable mechanical interlocking device for electrical cabinets according to claim 6, characterized in that, The interlocking support (1) has a clearance groove (11) at the top, and the U-shaped bottom of the U-shaped frame (8) passes through the clearance groove (11). The two U-shaped arms move on the upper and lower sides of the clearance groove (11) respectively.

9. The five-proof programmable mechanical interlocking device for electrical cabinets according to claim 8, characterized in that, The U-shaped frame (8) has an installation plate (12) that is fixedly connected to the interlocking support (1). The second program lock (2) is located on the installation plate (12) and is located on the lower side of the installation plate (12). The top of the lock head (21) passes through the installation plate (12) and is connected to a U-shaped arm of the U-shaped frame (8).

10. A gas-insulated switchgear, characterized in that, It includes the cabinet, the circuit breaker, and the five-proof mechanical locking device for electrical cabinets as described in any one of claims 1-9.

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