An interlocking device for preventing misoperation of an inflatable cabinet

Abstract

The present invention discloses an interlocking device for preventing misoperation of an inflatable cabinet, comprising a three-station interlocking device, a circuit breaker interlocking device, and a compartment door panel interlocking device. The three are used in combination to play a role, and the interlocking function is realized by utilizing the mechanical program lock interlocking principle. The overall structure can realize reliable interlocking and the functions required by "five protections" without changing the original cabinet structure and action principle. The structure is simple, the installation and debugging are convenient, the interlocking is stable, safe and reliable, and human manual or electric misoperation is fundamentally restricted, and personnel are effectively prevented from mistakenly entering the energized interval. After the inflatable cabinet is reliably grounded, personnel can be guaranteed to safely enter the compartment to maintain and inspect the inflatable cabinet, and the unlocking logic between the key K1 and the key K2 is reasonably allocated, so that each link is linked to the other, and the logical relationship of key unlocking is simplified.

Description

Technical Field

[0001] The invention relates to the field of interlocking safety devices for inflatable cabinets, in particular to an interlocking device for preventing misoperation of inflatable cabinets. Background Art

[0002] Gas insulated switchgear (referred to as gas-insulated switchgear) is one of the main equipment used for power transmission and transformation in power grids. Safety during its operation is particularly important. The isolating switches, circuit breaker switches and earthing switches in general air-type cabinets are installed in various compartments of the cabinet respectively. There are no restrictions on sealing conditions between the mechanisms and moving parts, and the corresponding interlocking functions can be well formed.

[0003] However, the inflatable cabinets currently in use generally adopt a direct-acting three-position (closing, opening, and grounding) mechanism operated in front of the cabinet. The isolating switch and the grounding switch are an integrated combination structure, and the opening and closing of the isolating switch and the opening and closing of the grounding switch are achieved by the movement of the screw driven by a sprocket. Due to the limitations of sealing components such as the gas box, and the cabinet structure generally adopts a rear-cabinet maintenance solution with a cable room (compartment) opening at the rear, and the compartment door panel is fixed with conventional bolts, it is unable to meet the requirements of the "five protections" standard for inflatable cabinets to prevent accidental opening and closing of circuit breakers and prevent accidental entry into energized intervals.

[0004] For example, a Chinese patent with publication number CN118899178A discloses a high-reliability mechanism interlocking device for an inflatable cabinet, comprising a circuit breaker mechanism, a three-position mechanism and a cable room located below the three-position mechanism, wherein the cable room is provided with a cable room door that slides upward and opens, and further comprising circuit breaker interlocking member 1 and circuit breaker interlocking member 2, which are used to realize the interlocking of the circuit breaker mechanism and the three-position mechanism, so that the circuit breaker can be closed only when the disconnecting switch is closed, and after the circuit breaker is closed, the disconnecting switch cannot be opened; further comprising a cable room door interlocking mechanism, the cable room door interlocking mechanism comprising cable room door interlocking member 1, cable room door interlocking member 2 and cable room door interlocking member 3, thereby realizing the interlocking between the three-position mechanism and the cable room door, so that the cable room door can be opened for maintenance when the grounding switch is closed, and the cable room door is not closed, the grounding switch cannot be opened, and power supply operation cannot be performed, thereby improving the safety of product use.

[0005] For example, a Chinese patent with publication number CN119230313A discloses a novel composite interlocking device for a CGIS double busbar inflatable cabinet, comprising a circuit breaker mechanism, a first three-position mechanism and a second three-position mechanism, a control interlocking device and an interlocking device, wherein the circuit breaker operating mechanism has a circuit breaker interlocking buckle plate for disconnecting the circuit breaker mechanism; the first three-position mechanism and the second three-position mechanism have corresponding valve opening latches, and the valve opening latches are moved to the left or right to open the corresponding valve of the first three-position mechanism or the second three-position mechanism; the valve opening latches of the first three-position mechanism and the second three-position mechanism are transmission-connected with the circuit breaker interlocking buckle plate through the control interlocking device; the interlocking device is connected to realize that one of the valve opening latches of the first three-position mechanism and the second three-position mechanism slides, and the other is locked by the interlocking device, thereby preventing the valve opening latches of the first three-position mechanism and the second three-position mechanism from actuating at the same time.

[0006] For example, a Chinese patent with publication number CN212907531U discloses a double-operating-axis three-position mechanism of an inflatable cabinet and its interlocking device, which is characterized in that it includes a support member, a guide plate, a screw rod and a limit rod one arranged between the second mounting plate and the third mounting plate, one end of the screw rod is connected to the axis of the first transmission gear, and the screw rod is matched with the slider; the first transmission gear is meshed with the second transmission gear, the axis of the second transmission gear is connected to the second mounting plate, and the operating handle is connected to the axis of the second transmission gear after passing through the first mounting plate; an interlocking plate is arranged on the outer side of the first mounting plate, and a hook for shifting the left leaf spring and a limit pin for shifting the right leaf spring during the movement are arranged on the interlocking plate, and a hole matched with the interlocking rod is also arranged, and a movable handle shaft is fixed on the outer side of the interlocking plate. Compared with the prior art, the utility model adopts double operating axis operation, has good interlocking, linkage and anti-starting effects, strong interlocking logic, and convenient and reliable locking, unlocking and conversion operations of the operating mechanism.

[0007] For example, a Chinese patent with publication number CN211294946U discloses a three-lock and two-key interlocking device for a ring network cabinet, including a program lock, an indication shaft, an opening shaft and a closing shaft arranged in an outer cover plate, the program lock is provided with a linkage plate, the linkage plate is provided with a limit shaft, the indication shaft is provided with a positioning plate matched with the limit shaft, the closing shaft is provided with a limit plate matched with the linkage plate, the closing shaft is provided with a limit rod, and the opening shaft is provided with a groove matching the limit rod. The device has good operating stability and safety.

[0008] In summary, there are many disadvantages in the existing inflatable cabinet interlocking safety device, which are summarized as follows:

[0009] ① Due to the limitation of the structural form of the above-mentioned high-current inflatable cabinet, there is no effective interlocking function between the three-position operating mechanism and the compartment. Regardless of whether the grounding switch is in the closed position, personnel can enter the compartment for maintenance and operation, and the three-position mechanism can also be operated at any time. It should be noted that the above-mentioned high-current inflatable cabinet is an inflatable high-voltage switchgear product with a rated current of more than 1250A, and its main purpose is a high-current inflatable cabinet for power transmission and transformation of power grids. It is not a compact inflatable insulating ring described in the above-mentioned comparative documents CN118899178A or CN211294946U, etc. Network cabinet (generally the current is below 1250A), the compact inflatable insulated ring network cabinet is structurally different from the high-current inflatable cabinet: the three-station, circuit breaker and compartment door panel are on the same mounting surface, and the relative spacing is shorter, the structure is more compact, and mechanical interlocking is easy to achieve; and the size layout of the high-current inflatable cabinet is based on the installation space requirements of the transformer and cable, as well as the requirements of high-current heat dissipation, which requires a larger space, resulting in a larger structural size and a more dispersed layout. Therefore, it cannot be confused with the cabinet types of the above-mentioned comparative documents CN118899178A or the comparative documents CN211294946U, etc.;

[0010] ②At the same time, there is no relevant interlocking device between the circuit breaker mechanism and the compartment door panel, which is prone to electrical misoperation and electric shock accidents during maintenance. The safety of the switchgear is low and the safety of maintenance personnel is low;

[0011] ③ It cannot meet the requirements of the “five protections” of the inflatable cabinet, namely, preventing the wrong opening and closing of the circuit breaker and preventing the wrong entry into the live compartment;

[0012] ④ At present, domestic inflatable high-voltage switchgear products (rated current above 1250A) generally have compartment door panels without mechanical interlocking function. If the cabinet and switch structure are redesigned, the cost and design workload are large. It is impossible to complete the redesign of the existing cabinet structure and the rectification of the on-site cabinet in a short time, which generates a lot of additional workload;

[0013] ⑤ The existing interlocking logic is not rigorous, and it is easy for other mechanisms to be operated in the interlocking state, which poses a major safety hazard. Summary of the invention

[0014] In view of the deficiencies in the prior art, the present invention provides an interlocking device for preventing misoperation of an inflatable cabinet to solve the above problems.

[0015] To achieve the above objectives, the present invention is implemented through the following technical solutions.

[0016] An interlocking device for preventing misoperation of an inflatable cabinet includes a three-position interlocking device, a circuit breaker interlocking device, and a compartment door interlocking device, and the three are installed at corresponding positions on the inflatable cabinet.

[0017] The three-station interlocking device includes an operation panel, a three-station mechanical lock, a three-station travel baffle, and a three-station travel switch. The operation panel is provided with a handle operation hole. Both the three-station mechanical lock and the three-station travel switch are fixed on the operation panel. The three-station mechanical lock is connected to the three-station travel baffle.

[0018] The circuit breaker interlocking device comprises a support plate, a limit baffle, a circuit breaker travel baffle, a circuit breaker mechanical lock, a circuit breaker travel switch, and a pressure block. The circuit breaker mechanical lock is arranged on the support plate. One end of the limit baffle is connected to the pressure block, and the other end can move on the support plate. The circuit breaker travel baffle corresponds to the circuit breaker travel switch, and the circuit breaker travel switch is fixed on the support plate.

[0019] The compartment door panel interlocking device comprises a fixing plate, a lock box, a compartment mechanical lock, and an automatic limit device. Both the compartment mechanical lock and the automatic limit device are arranged in the lock box and correspond to each other. The fixing plate is provided with a fixing hole.

[0020] Although the three-lock and two-key format has been recorded in the prior art, no one of them can be fully adapted to the inflatable cabinet of this scheme. Due to the special structure of the high-current inflatable cabinet, the overall interlocking optimization can be performed without changing the original structure of the inflatable cabinet by combining a three-position interlocking device, a circuit breaker interlocking device, and a compartment door panel interlocking device. The interlocking function is realized by utilizing the mechanical program lock interlocking principle. The overall reliable interlocking and "five-protection" functions can be realized without changing the original cabinet structure and action principle. The structure is simple, the installation and debugging are convenient, the interlocking is stable, safe and reliable, and manual or electric misoperation is fundamentally limited, effectively preventing personnel from mistakenly entering the energized interval. After the inflatable cabinet is reliably grounded, personnel can be guaranteed to safely enter the compartment for maintenance and inspection of the inflatable cabinet. The unlocking logic between key K1 and key K2 is reasonably allocated, so that each link is linked together and the logical relationship of key unlocking is simplified.

[0021] Preferably, the operating panel is fixed on a direct-acting three-position operating mechanism of the inflatable cabinet.

[0022] Preferably, a three-position lock tongue is provided in the three-position mechanical lock, one end of the three-position lock tongue is connected to the three-position travel baffle, and the other end corresponds to the position of the handle operating hole.

[0023] Preferably, the three-station interlocking device further comprises a position indicator plate and a three-station transmission shaft, one side of the three-station transmission shaft is connected to the direct-acting three-station operating mechanism of the inflatable cabinet, and the other side is connected to the position indicator plate.

[0024] Preferably, the position indicator disk is provided with a status indicator group, and the status indicator group is provided with three groups, namely, the isolating switch closed position, the isolating switch open position, and the grounding switch closed position. The operation panel is provided with an indicator hole, and the status indicator group can be exposed from the indicator hole.

[0025] Preferably, the position indicating disk is provided with an indicating groove, and the shape of the indicating groove is adapted to the three-position travel baffle.

[0026] Preferably, the three-position travel switch is electrically connected to a three-position motor in a direct-acting three-position operating mechanism of the inflatable cabinet.

[0027] Preferably, the support plate is fixed on the circuit breaker operating mechanism of the inflatable cabinet.

[0028] Preferably, the pressing block is connected to a connecting rod of a circuit breaker operating mechanism.

[0029] Preferably, the support plate is provided with a limit stop hole, a circuit breaker lock tongue is provided inside the circuit breaker mechanical lock, the shape of the circuit breaker lock tongue is adapted to the limit stop hole, one end of the circuit breaker lock tongue corresponds to the position of the limit stop hole, and the other end is connected to the circuit breaker travel baffle.

[0030] Preferably, the circuit breaker interlocking device also includes a mounting plate and a slide plate, wherein the mounting plate is fixed on the support plate, and a mounting hole groove adapted to the limit stop hole is provided on one side of the mounting plate corresponding to the limit stop plate, and the slide plate is slidably connected to the mounting plate.

[0031] Preferably, the skateboard is provided with a handle, and the position where the handle is connected to the mounting plate is a rectangular parallelepiped with arcs on both sides, and can be moved or fixed to the corresponding position of the mounting plate.

[0032] Preferably, both the mounting plate and the slide plate are provided with switch slots, and the shapes thereof are adapted to the opening and closing buttons of the circuit breaker operating mechanism.

[0033] Preferably, the circuit breaker travel switch corresponds to a circuit breaker motor in a circuit breaker operating mechanism of the inflatable cabinet that is electrically connected.

[0034] Preferably, a compartment lock tongue is provided in the compartment mechanical lock, and the compartment lock tongue corresponds to the position of the fixing hole.

[0035] Preferably, the automatic limit device includes a limit main board and a limit slide plate, the limit slide plate is movably arranged on the limit main board, and the limit slide plate is connected to the limit main board via a spring, and the position of the limit slide plate corresponds to the position of the fixed plate.

[0036] Preferably, the fixing plate is arranged in the inflatable cabinet.

[0037] Preferably, the lock core of the three-position mechanical lock is adapted to one of the lock cores of the circuit breaker mechanical lock, and the other lock core of the circuit breaker mechanical lock is adapted to the lock core of the compartment mechanical lock.

[0038] Preferably, the circuit breaker mechanical lock is a double-core mechanical lock, and the three-position mechanical lock and the compartment mechanical lock are both single-core mechanical locks, so that the key K2 can be operated and pulled out to unlock the compartment mechanical lock only when the key K1 is pulled out, which is convenient for on-site operators to operate in sequence and prevents the key K2 on the circuit breaker mechanical lock from being accidentally pulled out when the three-position operating mechanism is not grounded and locked, thereby improving production and assembly efficiency.

[0039] Preferably, the lock cores on the three-station mechanical lock and the circuit breaker mechanical lock can also be matched one-to-one with the lock cores on the compartment mechanical lock.

[0040] Preferably, the compartment mechanical lock is a double-core mechanical lock, and the three-position mechanical lock and the circuit breaker mechanical lock are both single-core mechanical locks, so that the compartment door panel can be unlocked and opened only when the direct-acting three-position operating mechanism is in the grounding switch closing position and the circuit breaker operating mechanism is in the closing position and in a locked state, thereby preventing personnel from mistakenly entering the energized interval when the grounding switch is not closed; conversely, only after the compartment door panel is closed can the key K1 and the key K2 on the compartment mechanical lock be pulled out to unlock the direct-acting three-position operating mechanism and the circuit breaker operating mechanism.

[0041] Compared with the prior art, the present invention discloses an interlocking device for preventing misoperation of an inflatable cabinet, including a three-station interlocking device, a circuit breaker interlocking device, and a compartment door panel interlocking device, which are used in combination to play a role.

[0042] ① Although the three-lock and two-key form has been recorded in the prior art, no one of them can be fully adapted to the inflatable cabinet of this scheme. Due to the special structure of the high-current inflatable cabinet, the overall interlocking optimization can be performed without changing the original inflatable cabinet structure by combining the three-position interlocking device, the circuit breaker interlocking device, and the compartment door panel interlocking device;

[0043] ② The circuit breaker mechanical lock is a double-core mechanical lock, and the three-position mechanical lock and compartment mechanical lock are both single-core mechanical locks. Only when the key K1 is pulled out can the circuit breaker mechanical lock be unlocked, and the key K2 can be operated and pulled out to unlock the compartment mechanical lock, which is convenient for on-site operators to operate in sequence, and also prevents the key K2 on the circuit breaker mechanical lock from being pulled out by mistake when the three-position operating mechanism is not grounded and locked, thereby improving production and assembly efficiency;

[0044] ③ The interlocking function is realized by using the interlocking principle of mechanical program lock. On the basis of not changing the original cabinet structure and action principle, reliable interlocking and the functions required by the "five protections" can be realized. The structure is simple, the installation and debugging are convenient, the interlocking is stable, safe and reliable, and the manual or electric misoperation is fundamentally limited. It effectively prevents personnel from mistakenly entering the live interval. After the inflatable cabinet is reliably grounded, it can ensure that personnel can safely enter the compartment for maintenance and inspection of the inflatable cabinet;

[0045] ④ Reasonably distribute the unlocking logic between key K1 and key K2, so that they are linked together and simplify the logical relationship of key unlocking;

[0046] ⑤ When the compartment mechanical lock is a double-core mechanical lock, and the three-position mechanical lock and the circuit breaker mechanical lock are both single-core mechanical locks, it is achieved that the compartment door panel can be unlocked and opened only when the direct-acting three-position operating mechanism is in the grounding switch closing position and the circuit breaker operating mechanism is in the closing position and in a locked state, so as to prevent personnel from mistakenly entering the energized interval when the grounding switch is not closed; conversely, only after the compartment door panel is closed, can the key K1 and the key K2 on the compartment mechanical lock be pulled out to unlock the direct-acting three-position operating mechanism and the circuit breaker operating mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a structural schematic diagram of the interlocking device for preventing misoperation of an inflatable cabinet according to the present invention;

[0048] Figure 2 It is a schematic diagram of the structure explosion of the three-station interlocking device of the present invention;

[0049] Figure 3 It is a structural schematic diagram of the position indicating plate of the present invention;

[0050] Figure 4 It is a schematic diagram of the structure and working state of the three-station interlocking device of the present invention;

[0051] Figure 5 It is a schematic diagram of the structure and working state of the three-station interlocking device of the present invention;

[0052] Figure 6 It is a schematic diagram of the structure explosion of the circuit breaker interlocking device of the present invention;

[0053] Figure 7 It is a schematic structural diagram of the circuit breaker interlocking device of the present invention;

[0054] Figure 8 It is a schematic diagram of the structural assembly of the circuit breaker interlocking device of the present invention;

[0055] Fig. 9 It is a schematic diagram of the structure and working state of the circuit breaker interlocking device of the present invention;

[0056] Fig.10 It is a schematic diagram of the structure and working state of the circuit breaker interlocking device of the present invention;

[0057] Fig.11 It is a schematic diagram of the structure explosion of the compartment door panel interlocking device of the present invention;

[0058] Fig.12 It is a schematic diagram of the structure closing of the compartment door panel interlocking device of the present invention;

[0059] Fig.13 It is a schematic diagram of the structure of the compartment door panel interlocking device of the present invention;

[0060] Fig.14 It is a schematic diagram of the structure and working state of the compartment door panel interlocking device of the present invention;

[0061] Fig.15 This is a schematic diagram of a three-station secondary control circuit of the present invention;

[0062] Fig.16 It is a schematic diagram of the secondary electric circuit of the circuit breaker of the present invention;

[0063] Fig.17 Schematic diagram of the structure of the interlocking device for preventing misoperation of the inflatable cabinet in Example 2 of the present invention;

[0064] Fig.18 This is a schematic diagram of the structure explosion of the three-station interlocking device in Example 2 of the present invention;

[0065] Fig.19 Schematic diagram of the structure of the position indicator plate in Embodiment 2 of the present invention;

[0066] Fig. 20 This is a schematic diagram of the structural working state of the three-station interlocking device in Example 2 of the present invention;

[0067] Fig.21 This is a schematic diagram of the structural working state of the three-station interlocking device in Example 2 of the present invention;

[0068] Fig. 22 It is a schematic diagram of the structure explosion of the circuit breaker interlocking device in Embodiment 2 of the present invention;

[0069] Fig.23 This is a schematic diagram of the structure of the circuit breaker interlocking device in Embodiment 2 of the present invention;

[0070] Fig.24 This is a schematic diagram of the structural assembly of the circuit breaker interlocking device in Embodiment 2 of the present invention;

[0071] Fig.25 This is a schematic diagram of the structural working state of the circuit breaker interlocking device in Embodiment 2 of the present invention;

[0072] Fig.26 This is a schematic diagram of the structural working state of the circuit breaker interlocking device in Embodiment 2 of the present invention;

[0073] Fig. 27 It is a schematic diagram of the structure explosion of the compartment door panel interlocking device in Example 2 of the present invention;

[0074] Fig.28 A schematic diagram of the structure closing of the compartment door panel interlocking device in Example 2 of the present invention;

[0075] Fig.29 This is a schematic diagram of the structure of the compartment door panel interlocking device in Example 2 of the present invention;

[0076] Fig.30 This is a schematic diagram of the structural working status of the compartment door panel interlocking device in Example 2 of the present invention. DETAILED DESCRIPTION

[0077] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0078] Example 1

[0079] An interlocking device for preventing misoperation of an inflatable cabinet comprises a three-position interlocking device 1, a circuit breaker interlocking device 2, and a compartment door panel interlocking device 3, and the three are installed at corresponding positions on the inflatable cabinet.

[0080] The three-station interlocking device 1 includes an operating panel 11, a three-station mechanical lock 12, a three-station travel baffle 13, and a three-station travel switch 14. The operating panel 11 is provided with a handle operating hole 111. The three-station mechanical lock 12 and the three-station travel switch 14 are both fixed on the operating panel 11. The three-station mechanical lock 12 is connected to the three-station travel baffle 13; the operating panel 11 is fixed on the direct-acting three-station operating mechanism of the inflatable cabinet.

[0081] A three-position lock tongue 121 is disposed in the three-position mechanical lock 12 . One end of the three-position lock tongue 121 is connected to the three-position travel baffle 13 , and the other end corresponds to the position of the handle operating hole 111 .

[0082] The three-station interlocking device 1 further comprises a position indicator plate 15 and a three-station transmission shaft 16 . One side of the three-station transmission shaft 16 is connected to the direct-acting three-station operating mechanism of the inflatable cabinet, and the other side is connected to the position indicator plate 15 .

[0083] The position indicator disk 15 is provided with a status indicator group 151, and the status indicator group 151 is provided with three groups, namely, the isolating switch closing position 1511, the isolating switch opening position 1512, and the grounding switch closing position 1513. The operating panel 11 is provided with an indication hole 112, and the status indicator group 151 can be exposed from the indication hole 112. The position indicator disk 15 is provided with an indication groove 152, and the shape of the indication groove 152 is adapted to the three-position travel baffle 13. The isolating switch opening position 1512 is actually also the opening position of the grounding switch, and the two share the same position, which is the middle position in the prior art, and the position relationship will not be elaborated here.

[0084] The three-position travel switch 14 is electrically connected to a three-position motor in a direct-acting three-position operating mechanism of the inflatable cabinet.

[0085] Although the direct-acting three-position operating mechanism of the inflatable cabinet is mentioned many times in the above scheme, this scheme aims to optimize and improve the direct-acting three-position operating mechanism originally included in the inflatable cabinet, and does not change the main structural features of the existing direct-acting three-position operating mechanism. The direct-acting three-position operating mechanism is part of the inflatable cabinet, so it will not be described in detail here.

[0086] The three positions of the direct-acting three-position operating mechanism refer to closing, opening, and grounding. The transmission shaft drives the sprocket and the screw to rotate, so that the moving contact in the three-position primary mechanism part moves forward and backward, respectively realizing the closing and opening operations of the disconnector and the grounding switch. The above is the conventional structure of the direct-acting three-position operating mechanism. At the same time, the three-position transmission shaft 16 drives the position indicator disk 15 to rotate, which is used to display the specific closing and opening positions of the direct-acting three-position operating mechanism on the operating panel 11, as follows:

[0087] Unlocked state (such as Figure 4 As shown in the figure): When the three-station transmission shaft 16 moves to the isolating switch closing position 1511 and the isolating switch opening position 1512 on the status indicator group 151, the three-station travel baffle 13 presses the travel switch contact to close the three-station travel switch 14, and the three-station secondary control circuit (as shown in the figure) Fig.15 The three-station travel baffle 13 cannot be inserted into the indicating groove 152, the three-station mechanical lock 12 cannot be locked, the key K1 cannot be pulled out, the handle operating hole 111 is unobstructed, and the operating handle can be inserted and operated normally.

[0088] Locked state (such as Figure 5As shown): When the transmission shaft moves to the grounding switch closing position 1513 on the status indicator group 151, the indicating groove 152 is rotated to the unlocking position of the three-position travel baffle 13, and the key K1 is turned to lock the three-position mechanical lock 12, and the three-position travel baffle 13 moves horizontally into the indicating groove 152, and the three-position travel switch 14 is disconnected. The three-position lock tongue 121 blocks the handle operating hole 111, so that the operating handle cannot be inserted and operated, and at the same time, the contact of the three-position travel switch 14 is released, disconnecting the three-position motor control circuit, that is, the three-position secondary control circuit (as shown in FIG. Fig.15 As shown), the manual or electric operation of the direct-acting three-position operating mechanism is effectively closed and disconnected to achieve the position locking of the grounding switch. At this moment, the key K1 can be pulled out and used to unlock the circuit breaker mechanical lock 24.

[0089] The circuit breaker interlocking device 2 includes a support plate 21, a limit baffle 22, a circuit breaker travel baffle 23, a circuit breaker mechanical lock 24, a circuit breaker travel switch 25, and a pressure block 26. The circuit breaker mechanical lock 24 is arranged on the support plate 21. One end of the limit baffle 22 is connected to the pressure block 26, and the other end can move on the support plate 21. The circuit breaker travel baffle 23 corresponds to the circuit breaker travel switch 25, and the circuit breaker travel switch 25 is fixed on the support plate 21; the support plate 21 is fixed on the circuit breaker operating mechanism of the inflatable cabinet.

[0090] Although the circuit breaker operating mechanism of the gas-filled cabinet is mentioned many times in the above scheme, this scheme aims to optimize and improve the circuit breaker operating mechanism originally contained in the gas-filled cabinet, and does not change the main structural features of the existing circuit breaker operating mechanism. The circuit breaker operating mechanism is part of the gas-filled cabinet, so it will not be described in detail here. The same applies to the gas-filled cabinet, so it will not be described in detail.

[0091] The pressing block 26 is connected to the connecting rod of the circuit breaker operating mechanism, and the connecting rod is also a part of the original structure of the circuit breaker operating mechanism. This solution uses the connecting rod to achieve certain actions and does not change the structure of the connecting rod itself, so it will not be described in detail.

[0092] The support plate 21 is provided with a limit stop hole 211, and a circuit breaker lock tongue 241 is provided inside the circuit breaker mechanical lock 24. The shape of the circuit breaker lock tongue 241 is adapted to the limit stop hole 211. One end of the circuit breaker lock tongue 241 corresponds to the position of the limit stop hole 211, and the other end is connected to the circuit breaker travel baffle 23.

[0093] The circuit breaker interlocking device 2 also includes a mounting plate 27 and a slide plate 28. The mounting plate 27 is fixed on the support plate 21, and a mounting hole groove adapted to the limit stop hole 211 is provided on one side of the mounting plate 27 corresponding to the limit stop plate 22. The slide plate 28 is slidably connected to the mounting plate 27.

[0094] The slide plate 28 is provided with a handle 281 , and the position where the handle 281 is connected to the mounting plate 27 is a rectangular parallelepiped with arcs on both sides, and can be moved or fixed to the corresponding position of the mounting plate 27 .

[0095] The mounting plate 27 and the slide plate 28 are both provided with switch slots 271, and the shapes thereof are adapted to the opening and closing buttons of the circuit breaker operating mechanism.

[0096] The circuit breaker travel switch 25 corresponds to the circuit breaker motor in the circuit breaker operating mechanism of the inflatable cabinet.

[0097] The main function is to close the circuit breaker operating mechanism when the grounding switch of the direct-acting three-position operating mechanism is closed, and after the line side is effectively grounded, disconnect the secondary electric circuit of the circuit breaker (such as Fig.16 As shown in the figure, the circuit breaker opening and closing buttons are covered to prevent personnel from accidentally opening the circuit breaker switch electrically or manually. Only after the switch of the circuit breaker operating mechanism is closed and the circuit breaker mechanical lock 24 on the support plate 21 is locked, the slide plate 28 is on the upper edge of the circuit breaker lock tongue 241, and the circuit breaker operating mechanism opening and closing buttons are covered to prevent human misoperation from the outside, as follows:

[0098] In the circuit breaker operating mechanism opening state: the connecting rod is at the lowest position, at this time, the limit baffle 22 blocks the circuit breaker lock tongue 241, so that the circuit breaker mechanical lock 24 cannot be locked, the circuit breaker mechanical lock 24 is in the unlocked state, the key K2 cannot be pulled out, and the contact of the circuit breaker travel switch 25 is released and in the normally closed state, the circuit breaker secondary electric circuit is normally connected, and at this time, the circuit breaker operating mechanism opening and closing buttons are not blocked and can be operated normally;

[0099] When the cable room of the inflatable cabinet needs to be inspected and maintained: the circuit breaker operating mechanism needs to be closed to form an effective grounding on the line side. When the circuit breaker operating mechanism completes the closing, the connecting rod will move upward in a straight line with the rotation of the circuit breaker main shaft, driving the limit baffle 22 on the side of the pressure block 26 to move upward, and then operate the handle 281 to lift the slide plate 28 upward, rotate it and lock it, the opening and closing buttons of the circuit breaker operating mechanism are covered, and manual opening and closing cannot be performed. At this time, the circuit breaker mechanical lock 24 can be locked, and the circuit breaker lock tongue 241 is inserted into the lower edge of the slide plate 28 to prevent the slide plate 28 from being lowered; when the circuit breaker mechanical lock 24 is locked, the circuit breaker travel baffle 23 presses the contact of the circuit breaker travel switch 25, so that the normally closed contact of the circuit breaker travel switch 25 is disconnected, and the electric operation circuit of the circuit breaker operating mechanism is cut off, so that personnel cannot electrically or manually operate the switch button of the circuit breaker operating mechanism.

[0100] The compartment door panel interlocking device 3 includes a fixing plate 31, a lock box 32, a compartment mechanical lock 33, and an automatic limiting device 34. Both the compartment mechanical lock 33 and the automatic limiting device 34 are arranged in the lock box 32 and correspond to each other. The fixing plate 31 is provided with a fixing hole 311, and the compartment mechanical lock 33 is provided with a compartment lock tongue 331. The compartment lock tongue 331 corresponds to the position of the fixing hole 311. The compartment door panel interlocking device 3 installed in the compartment door panel of the inflatable cabinet can only be used to unlock the compartment mechanical lock 33 on the compartment door panel after the grounding switch of the three-position operating mechanism is closed and the three-position mechanical lock 12 is locked. At the same time, the circuit breaker operating mechanism completes the closing and locks the circuit breaker mechanical lock 24. After that, the key K2 can be pulled out. After the compartment door panel is opened, the automatic limiting device 34 in the lock box 32 will limit the operation of the compartment mechanical lock 33 on the compartment door panel. At this time, the lock key K2 cannot be pulled out to prevent personnel from using the key to unlock the circuit breaker operating mechanism.

[0101] The automatic limiting device 34 includes a limiting main board 341 and a limiting slide plate 342. The limiting slide plate 342 is movably arranged on the limiting main board 341, and the limiting slide plate 342 is connected to the limiting main board 341 through a spring. The position of the limiting slide plate 342 corresponds to the position of the fixed plate 31.

[0102] The fixing plate 31 is arranged in the inflatable cabinet.

[0103] When the compartment door is closed, the fixing plate 31 pushes the limiting slide plate 342 on the automatic limiting device 34, so that the compartment lock tongue 331 can pass through the lock hole of the limiting main plate 341, locking the compartment door and preventing it from being opened.

[0104] After unlocking the compartment mechanical lock 33 on the compartment door panel with key K2 and opening the compartment door panel, the fixed plate 31 pulls out the automatic limit device 34, and the automatic limit device 34 resets the limit slide plate 342 through the spring. At this time, the compartment lock tongue 331 is blocked by the limit slide plate 342 and cannot be locked, that is, the key K2 cannot be pulled out, preventing the key K2 from being pulled out and used to unlock the circuit breaker operating mechanism when personnel perform maintenance operations in the compartment.

[0105] The lock core of the three-position mechanical lock 12 is adapted to one of the lock cores of the circuit breaker mechanical lock 24, and the other lock core of the circuit breaker mechanical lock 24 is adapted to the lock core of the compartment mechanical lock 33. Both the three-position mechanical lock 12 and the compartment mechanical lock 33 are single-core mechanical locks, and the circuit breaker mechanical lock 24 is a double-core mechanical lock.

[0106] The three-position mechanical lock 12 is a single lock cylinder. In the locked state, that is, when the three-position lock tongue 121 is fully extended, the key K1 can be pulled out and used to unlock the circuit breaker mechanical lock 24;

[0107] The circuit breaker mechanical lock 24 is a double lock cylinder. In the normal unlocking state, the key K2 is inserted into the circuit breaker mechanical lock 24, the circuit breaker mechanical lock 24 cannot be operated, and the key K2 cannot be pulled out; the key K1 must be inserted and rotated into place before the key K2 can be locked. After locking, the key K1 cannot be pulled out, and the key K2 can be pulled out and used to unlock the compartment mechanical lock 33; conversely, after the key K2 is unlocked and rotated into place, the key K1 can be rotated and pulled out to unlock the three-position mechanical lock 12, and the key K2 cannot be pulled out at this time;

[0108] The compartment mechanical lock 33 is a single lock core. In the locked state, the key K2 is inserted and unlocked. After unlocking, the key K2 cannot be pulled out; conversely, only when the compartment mechanical lock 33 is locked can the key K2 be pulled out to unlock the circuit breaker mechanical lock 24.

[0109] Example 2

[0110] Based on the above basic scheme, the interlocking device for preventing misoperation of the inflatable cabinet includes a three-position interlocking device 1, a circuit breaker interlocking device 2, and a compartment door panel interlocking device 3, and the three are installed at corresponding positions on the inflatable cabinet.

[0111] The three-station interlocking device 1 includes an operating panel 11, a three-station mechanical lock 12, a three-station travel baffle 13, and a three-station travel switch 14. The operating panel 11 is provided with a handle operating hole 111. The three-station mechanical lock 12 and the three-station travel switch 14 are both fixed on the operating panel 11. The three-station mechanical lock 12 is connected to the three-station travel baffle 13; the operating panel 11 is fixed on the direct-acting three-station operating mechanism of the inflatable cabinet.

[0112] A three-position lock tongue 121 is disposed in the three-position mechanical lock 12 . One end of the three-position lock tongue 121 is connected to the three-position travel baffle 13 , and the other end corresponds to the position of the handle operating hole 111 .

[0113] The three-station interlocking device 1 further comprises a position indicator plate 15 and a three-station transmission shaft 16 . One side of the three-station transmission shaft 16 is connected to the direct-acting three-station operating mechanism of the inflatable cabinet, and the other side is connected to the position indicator plate 15 .

[0114] The position indicator disk 15 is provided with a status indicator group 151, and the status indicator group 151 is provided with three groups, namely, the isolating switch closing position 1511, the isolating switch opening position 1512, and the grounding switch closing position 1513. The operating panel 11 is provided with an indication hole 112, and the status indicator group 151 can be exposed from the indication hole 112. The position indicator disk 15 is provided with an indication groove 152, and the shape of the indication groove 152 is adapted to the three-position travel baffle 13. The isolating switch opening position 1512 is actually also the opening position of the grounding switch, and the two share the same position, which is the middle position in the prior art, and the position relationship will not be elaborated here.

[0115] The three-position travel switch 14 is electrically connected to a three-position motor in a direct-acting three-position operating mechanism of the inflatable cabinet.

[0116] Although the direct-acting three-position operating mechanism of the inflatable cabinet is mentioned many times in the above scheme, this scheme aims to optimize and improve the direct-acting three-position operating mechanism originally included in the inflatable cabinet, and does not change the main structural features of the existing direct-acting three-position operating mechanism. The direct-acting three-position operating mechanism is part of the inflatable cabinet, so it will not be described in detail here.

[0117] The three positions of the direct-acting three-position operating mechanism refer to closing, opening, and grounding. The transmission shaft drives the sprocket and the screw to rotate, so that the moving contact in the three-position primary mechanism part moves forward and backward, respectively realizing the closing and opening operations of the disconnector and the grounding switch. The above is the conventional structure of the direct-acting three-position operating mechanism. At the same time, the three-position transmission shaft 16 drives the position indicator disk 15 to rotate, which is used to display the specific closing and opening positions of the direct-acting three-position operating mechanism on the operating panel 11, as follows:

[0118] Unlocked state (such as Fig. 20 As shown in the figure): When the three-station transmission shaft 16 moves to the isolating switch closing position 1511 and the isolating switch opening position 1512 on the status indicator group 151, the three-station travel baffle 13 presses the travel switch contact to close the three-station travel switch 14, and the three-station secondary control circuit (as shown in the figure) Fig.15 The three-station travel baffle 13 cannot be inserted into the indicating groove 152, the three-station mechanical lock 12 cannot be locked, the key K1 cannot be pulled out, the handle operating hole 111 is unobstructed, and the operating handle can be inserted and operated normally.

[0119] Locked state (such as Fig.21As shown): When the transmission shaft moves to the grounding switch closing position 1513 on the status indicator group 151, the indicating groove 152 is rotated to the unlocking position of the three-position travel baffle 13, and the key K1 is turned to lock the three-position mechanical lock 12, and the three-position travel baffle 13 moves horizontally into the indicating groove 152, and the three-position travel switch 14 is disconnected. The three-position lock tongue 121 blocks the handle operating hole 111, so that the operating handle cannot be inserted and operated, and at the same time, the contact of the three-position travel switch 14 is released, disconnecting the three-position motor control circuit, that is, the three-position secondary control circuit (as shown in FIG. Fig.15 As shown), the manual or electric operation of the direct-acting three-position operating mechanism is effectively closed and disconnected to achieve the position locking of the grounding switch. At this moment, the key K1 can be pulled out and used to unlock the compartment mechanical lock 33.

[0120] The circuit breaker interlocking device 2 includes a support plate 21, a limit baffle 22, a circuit breaker travel baffle 23, a circuit breaker mechanical lock 24, a circuit breaker travel switch 25, and a pressure block 26. The circuit breaker mechanical lock 24 is arranged on the support plate 21. One end of the limit baffle 22 is connected to the pressure block 26, and the other end can move on the support plate 21. The circuit breaker travel baffle 23 corresponds to the circuit breaker travel switch 25, and the circuit breaker travel switch 25 is fixed on the support plate 21; the support plate 21 is fixed on the circuit breaker operating mechanism of the inflatable cabinet.

[0121] Although the circuit breaker operating mechanism of the gas-filled cabinet is mentioned many times in the above scheme, this scheme aims to optimize and improve the circuit breaker operating mechanism originally contained in the gas-filled cabinet, and does not change the main structural features of the existing circuit breaker operating mechanism. The circuit breaker operating mechanism is part of the gas-filled cabinet, so it will not be described in detail here. The same applies to the gas-filled cabinet, so it will not be described in detail.

[0122] The pressing block 26 is connected to the connecting rod of the circuit breaker operating mechanism, and the connecting rod is also a part of the original structure of the circuit breaker operating mechanism. This solution uses the connecting rod to achieve certain actions and does not change the structure of the connecting rod itself, so it will not be described in detail.

[0123] The support plate 21 is provided with a limit stop hole 211, and a circuit breaker lock tongue 241 is provided inside the circuit breaker mechanical lock 24. The shape of the circuit breaker lock tongue 241 is adapted to the limit stop hole 211. One end of the circuit breaker lock tongue 241 corresponds to the position of the limit stop hole 211, and the other end is connected to the circuit breaker travel baffle 23.

[0124] The circuit breaker interlocking device 2 also includes a mounting plate 27 and a slide plate 28. The mounting plate 27 is fixed on the support plate 21, and a mounting hole groove adapted to the limit stop hole 211 is provided on one side of the mounting plate 27 corresponding to the limit stop plate 22. The slide plate 28 is slidably connected to the mounting plate 27.

[0125] The slide plate 28 is provided with a handle 281 , and the position where the handle 281 is connected to the mounting plate 27 is a rectangular parallelepiped with arcs on both sides, and can be moved or fixed to the corresponding position of the mounting plate 27 .

[0126] The mounting plate 27 and the slide plate 28 are both provided with switch slots 271, and the shapes thereof are adapted to the opening and closing buttons of the circuit breaker operating mechanism.

[0127] The circuit breaker travel switch 25 corresponds to the circuit breaker motor in the circuit breaker operating mechanism of the inflatable cabinet.

[0128] The main function is to close the circuit breaker operating mechanism when the grounding switch of the direct-acting three-position operating mechanism is closed, and after the line side is effectively grounded, disconnect the secondary electric circuit of the circuit breaker (such as Fig.16 As shown in the figure, the circuit breaker opening and closing buttons are covered to prevent personnel from accidentally opening the circuit breaker switch electrically or manually. Only after the switch of the circuit breaker operating mechanism is closed and the circuit breaker mechanical lock 24 on the support plate 21 is locked, the slide plate 28 is on the upper edge of the circuit breaker lock tongue 241, and the circuit breaker operating mechanism opening and closing buttons are covered to prevent human misoperation from the outside, as follows:

[0129] In the circuit breaker operating mechanism opening state: the connecting rod is at the lowest position, at this time, the limit baffle 22 blocks the circuit breaker lock tongue 241, so that the circuit breaker mechanical lock 24 cannot be locked, the circuit breaker mechanical lock 24 is in the unlocked state, the key K2 cannot be pulled out, and the contact of the circuit breaker travel switch 25 is released and in the normally closed state, the circuit breaker secondary electric circuit is normally connected, and at this time, the circuit breaker operating mechanism opening and closing buttons are not blocked and can be operated normally;

[0130] When the cable room of the inflatable cabinet needs to be inspected and maintained: the circuit breaker operating mechanism needs to be closed to form an effective grounding on the line side. When the circuit breaker operating mechanism completes the closing, the connecting rod will move upward in a straight line with the rotation of the circuit breaker main shaft, driving the limit baffle 22 on the side of the pressure block 26 to move upward, and then operate the handle 281 to lift the slide plate 28 upward, rotate it and lock it, the opening and closing buttons of the circuit breaker operating mechanism are covered, and manual opening and closing cannot be performed. At this time, the circuit breaker mechanical lock 24 can be locked, and the circuit breaker lock tongue 241 is inserted into the lower edge of the slide plate 28 to prevent the slide plate 28 from being lowered; when the circuit breaker mechanical lock 24 is locked, the circuit breaker travel baffle 23 presses the contact of the circuit breaker travel switch 25, so that the normally closed contact of the circuit breaker travel switch 25 is disconnected, and the electric operation circuit of the circuit breaker operating mechanism is cut off, so that personnel cannot electrically or manually operate the switch button of the circuit breaker operating mechanism.

[0131] The compartment door panel interlocking device 3 comprises a fixing plate 31, a lock box 32, a compartment mechanical lock 33, and an automatic limit device 34. Both the compartment mechanical lock 33 and the automatic limit device 34 are arranged in the lock box 32 and correspond to each other. A fixing hole 311 is arranged on the fixing plate 31. A compartment lock tongue 331 is arranged in the compartment mechanical lock 33. The compartment lock tongue 331 corresponds to the position of the fixing hole 311. The compartment door panel interlocking device 3 installed in the compartment door panel of the inflatable cabinet is closed when the three-position grounding switch is turned on and locked. The three-position mechanical lock 12 on the operation panel 11 and the circuit breaker operating mechanism complete the closing and lock the circuit breaker interlocking device 2, then the key K1 and the key K2 can be pulled out to unlock the compartment mechanical lock 33. After opening the compartment door panel, the automatic limit device 34 in the lock box 32 is pulled back by the internal spring to limit the operation of the compartment mechanical lock 33 on the compartment door panel. At this time, the key K1 and the key K2 cannot be pulled out, preventing personnel from using the keys to unlock the three-position mechanical lock 12 or the circuit breaker mechanical lock 24.

[0132] The automatic limiting device 34 includes a limiting main board 341 and a limiting slide plate 342. The limiting slide plate 342 is movably arranged on the limiting main board 341, and the limiting slide plate 342 is connected to the limiting main board 341 through a spring. The position of the limiting slide plate 342 corresponds to the position of the fixed plate 31.

[0133] The fixing plate 31 is arranged in the inflatable cabinet.

[0134] When the compartment door is closed, the fixing plate 31 pushes the limiting slide plate 342 on the automatic limiting device 34, so that the compartment lock tongue 331 can pass through the lock hole of the limiting main plate 341, locking the compartment door and preventing it from being opened.

[0135] After unlocking the compartment mechanical lock 33 on the compartment door panel with key K1 and key K2 and opening the compartment door panel, the fixed plate 31 pulls out the automatic limit device 34, and the automatic limit device 34 resets the limit slide 342 through the spring. At this time, the compartment lock tongue 331 is blocked by the limit slide 342 and cannot be locked, that is, key K1 and key K2 cannot be pulled out, preventing key K1 or key K2 from being pulled out and used to unlock the three-position operating mechanism or the circuit breaker operating mechanism when personnel perform maintenance operations in the compartment.

[0136] The lock cores of the three-station mechanical lock 12 and the circuit breaker mechanical lock 24 are respectively matched with the lock cores of the compartment mechanical lock 33. The compartment mechanical lock 33 is a double-core mechanical lock, and the three-station mechanical lock 12 and the circuit breaker mechanical lock 24 are single-core mechanical locks.

[0137] The three-position mechanical lock 12 is a single lock cylinder. In the locked state, that is, when the three-position lock tongue 121 is fully extended, the key K1 can be pulled out and used to unlock the compartment mechanical lock 33;

[0138] The circuit breaker mechanical lock 24 is a single lock cylinder. In the locked state, that is, when the circuit breaker lock tongue 241 is fully extended, the key K2 can be pulled out and used to unlock the compartment mechanical lock 33;

[0139] The compartment mechanical lock 33 is a double lock cylinder. In the locked state, the unlocking operation can only be performed after the key K1 and the key K2 are inserted at the same time. After unlocking, the key K1 and the key K2 cannot be pulled out; conversely, only when the compartment mechanical lock 33 is in the locked state, that is, when the compartment lock tongue 331 is fully extended, can the key K1 and the key K2 be pulled out for unlocking the three-position mechanical lock 12 and the circuit breaker mechanical lock 24.

[0140] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0141] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0142] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An interlocking device for preventing misoperation of an inflatable cabinet, characterized in that: It comprises a three-station interlocking device (1), a circuit breaker interlocking device (2), and a compartment door panel interlocking device (3), and the three are installed at corresponding positions on the inflatable cabinet. The three-station interlocking device (1) comprises an operation panel (11), a three-station mechanical lock (12), a three-station travel baffle (13), and a three-station travel switch (14); the operation panel (11) is provided with a handle operation hole (111); the three-station mechanical lock (12) and the three-station travel switch (14) are both fixed on the operation panel (11); and the three-station mechanical lock (12) is connected to the three-station travel baffle (13); The circuit breaker interlocking device (2) comprises a support plate (21), a limit baffle (22), a circuit breaker travel baffle (23), a circuit breaker mechanical lock (24), a circuit breaker travel switch (25), and a pressure block (26); the circuit breaker mechanical lock (24) is arranged on the support plate (21); one end of the limit baffle (22) is connected to the pressure block (26), and the other end is movable on the support plate (21); the circuit breaker travel baffle (23) corresponds to the circuit breaker travel switch (25), and the circuit breaker travel switch (25) is fixed on the support plate (21); The compartment door panel interlocking device (3) comprises a fixing plate (31), a lock box (32), a compartment mechanical lock (33), and an automatic limit device (34); both the compartment mechanical lock (33) and the automatic limit device (34) are arranged in the lock box (32) and correspond to each other; and a fixing hole (311) is provided on the fixing plate (31).

2. The interlocking device for preventing misoperation of an inflatable cabinet according to claim 1 is characterized in that: The operating panel (11) is fixed on a direct-acting three-position operating mechanism of the inflatable cabinet.

3. The interlocking device for preventing misoperation of an inflatable cabinet according to claim 1 is characterized in that: The three-station mechanical lock (12) is provided with a three-station lock tongue (121), one end of the three-station lock tongue (121) is connected to the three-station travel baffle (13), and the other end corresponds to the position of the handle operating hole (111).

4. The interlocking device for preventing misoperation of an inflatable cabinet according to claim 1 is characterized in that: The three-station interlocking device (1) further comprises a position indicator disk (15) and a three-station transmission shaft (16); one side of the three-station transmission shaft (16) is connected to the direct-acting three-station operating mechanism of the inflatable cabinet, and the other side is connected to the position indicator disk (15).

5. The interlocking device for preventing misoperation of an inflatable cabinet according to claim 4 is characterized in that: The position indicator disk (15) is provided with a status indicator group (151), and the status indicator group (151) is provided with three groups, namely, an isolating switch closing position (1511), an isolating switch opening position (1512), and an earthing switch closing position (1513). The operation panel (11) is provided with an indicator hole (112), and the status indicator group (151) can be exposed from the indicator hole (112).

6. The interlocking device for preventing misoperation of an inflatable cabinet according to claim 4 is characterized in that: The position indicating disk (15) is provided with an indicating groove (152), and the shape of the indicating groove (152) is adapted to the three-position travel baffle (13).

7. The interlocking device for preventing misoperation of an inflatable cabinet according to claim 1 is characterized in that: The three-position travel switch (14) is electrically connected to a three-position motor in a direct-acting three-position operating mechanism of the inflatable cabinet.

8. The interlocking device for preventing misoperation of an inflatable cabinet according to claim 1 is characterized in that: The support plate (21) is fixed on the circuit breaker operating mechanism of the gas-filled cabinet.

9. The interlocking device for preventing misoperation of an inflatable cabinet according to claim 1, characterized in that: The pressing block (26) is connected to a connecting rod of a circuit breaker operating mechanism.

10. The interlocking device for preventing misoperation of an inflatable cabinet according to claim 1, characterized in that: The support plate (21) is provided with a limit stop hole (211), a circuit breaker lock tongue (241) is provided inside the circuit breaker mechanical lock (24), the shape of the circuit breaker lock tongue (241) is adapted to the limit stop hole (211), one end of the circuit breaker lock tongue (241) corresponds to the position of the limit stop hole (211), and the other end is connected to the circuit breaker travel baffle (23).

11. The interlocking device for preventing misoperation of an inflatable cabinet according to claim 10, characterized in that: The circuit breaker interlocking device (2) further comprises a mounting plate (27) and a slide plate (28); the mounting plate (27) is fixed on the support plate (21); a mounting hole groove adapted to the limit stop hole (211) is provided on one side of the mounting plate (27) corresponding to the limit stop plate (22); and the slide plate (28) is slidably connected to the mounting plate (27).

12. The interlocking device for preventing misoperation of an inflatable cabinet according to claim 11, characterized in that: The slide plate (28) is provided with a handle (281), and the position where the handle (281) is connected to the mounting plate (27) is a rectangular parallelepiped with arcs on both sides, and can be moved or fixed to the corresponding position of the mounting plate (27).

13. The interlocking device for preventing misoperation of an inflatable cabinet according to claim 12, characterized in that: The mounting plate (27) and the slide plate (28) are both provided with switch slots (271), and the shapes thereof are adapted to the opening and closing buttons of the circuit breaker operating mechanism.

14. The interlocking device for preventing misoperation of an inflatable cabinet according to claim 8, characterized in that: The circuit breaker travel switch (25) corresponds to the circuit breaker motor in the circuit breaker operating mechanism of the inflatable cabinet.

15. The interlocking device for preventing misoperation of an inflatable cabinet according to claim 1, characterized in that: A compartment lock tongue (331) is provided in the compartment mechanical lock (33), and the compartment lock tongue (331) corresponds to the position of the fixing hole (311).

16. The interlocking device for preventing misoperation of an inflatable cabinet according to claim 1, characterized in that: The automatic limit device (34) comprises a limit main board (341) and a limit slide plate (342); the limit slide plate (342) is movably arranged on the limit main board (341), and the limit slide plate (342) is connected to the limit main board (341) via a spring inside; the position of the limit slide plate (342) corresponds to the position of the fixed plate (31).

17. The interlocking device for preventing misoperation of an inflatable cabinet according to claim 1, characterized in that: The fixing plate (31) is arranged in the inflatable cabinet.

18. The interlocking device for preventing misoperation of an inflatable cabinet according to claim 1, characterized in that: The lock core of the three-position mechanical lock (12) is adapted to one of the lock cores of the circuit breaker mechanical lock (24), and the other lock core of the circuit breaker mechanical lock (24) is adapted to the lock core of the compartment mechanical lock (33).

19. The interlocking device for preventing misoperation of an inflatable cabinet according to claim 18, characterized in that: The circuit breaker mechanical lock (24) is a double-core mechanical lock, and the three-station mechanical lock (12) and the compartment mechanical lock (33) are both single-core mechanical locks.

20. The interlocking device for preventing misoperation of an inflatable cabinet according to claim 1, characterized in that: The lock cores on the three-station mechanical lock (12) and the circuit breaker mechanical lock (24) can also be matched with the lock cores on the compartment mechanical lock (33) in a one-to-one correspondence.

21. The interlocking device for preventing misoperation of an inflatable cabinet according to claim 20, characterized in that: The compartment mechanical lock (33) is a double-core mechanical lock, and the three-station mechanical lock (12) and the circuit breaker mechanical lock (24) are both single-core mechanical locks.

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