Door interlock for gas insulated switchgear

Abstract

The utility model relates to a door interlock for a gas insulated switchgear, which comprises an interlock support, a first lock plate and a second lock plate are arranged at the front end of the interlock support, the two lock plates are elastically and rotatably connected with the interlock support, and the two lock plates are suitable for locking a cabinet door of a cable chamber; the first interlocking mechanism is connected between the first locking plate and the three-station mechanism, and when the three-station mechanism is located at the grounding closing station, the first locking plate is driven by the first interlocking mechanism to unlock the cabinet door; and the second interlocking mechanism is connected between the second locking plate and the circuit breaker, and when the circuit breaker is located at the switching-on station, the second locking plate is driven by the second interlocking mechanism to unlock the cabinet door. The door interlock for the gas-insulated switchgear is mechanical interlock, has higher reliability compared with electrical interlock, provides safety guarantee for operation and maintenance of the gas-insulated switchgear, and reduces the probability of accidents caused by misoperation.

Description

Technical Field

[0001] The utility model relates to the technical field of power switch cabinets, in particular to a door interlock for an inflatable cabinet. Background Art

[0002] The three-position mechanism is a key component of the gas cabinet, a mechanical device that switches between its operating positions. It has three operating positions: closed, isolated, and grounded. Mechanical interlocks between the positions prevent the grounding switch from being closed while the main circuit is energized, thus preventing accidental operation. During normal operation, the cable compartment door is closed, while the primary main circuit is energized, and cannot be opened from the outside. When maintenance is required, the circuit breaker must first be opened, the three-position mechanism operated to the grounded position, and then the circuit breaker closed. The cable compartment door can only be opened after the interlock is released. Upon completion of maintenance, the cable compartment door must be closed before the circuit breaker is opened. The three-position mechanism must then be operated to the isolated closed position, and the circuit breaker closed to energize the primary main circuit. The cable compartment door can only be opened and closed when the three-position mechanism is in the grounded position and the circuit breaker is closed.

[0003] Due to the limitations of inflatable cabinets such as small size, compact structure, and modular components, interlocking structure layout is often difficult to implement or the structure is complex. Currently, inflatable cabinets on the market are generally small in size and most use electrical interlocking instead.

[0004] Electrical interlocking is a more commonly used interlocking method in inflatable cabinets because of its simple structure and easy installation. That is, an electromagnetic lock device is installed on the cable room door, so that the electromagnetic lock device and the live display form a reverse electrical locking circuit (the live display gives a signal through the primary circuit). That is, after the primary circuit is powered off, the electromagnetic lock will be energized through the secondary control power supply to attract the lock core, and the cable room door can be opened. After the primary circuit is energized, the electromagnetic lock will be powered off and lose its suction, and the cable room door cannot be opened. However, this method has a low safety factor and components are easily damaged.

[0005] The electrical interlock uses a capacitive sensor on the inlet bushing of the inflatable cabinet to generate an electrical signal as a locking condition, which is then fed to the electromagnetic actuator to lock the cable compartment door. The reliability of the electrical interlock depends on multiple factors, including the electromagnetic lock and the acquisition of electrical signals. This lack of control over human error presents certain safety hazards, cannot fully guarantee the safe operation and maintenance of the equipment, and poses a threat to the life of the operators and serious property damage. A missing or defective interlock device can cause an operator to mistakenly open the cable compartment door while the power is on, resulting in certain accidents, threats to the operator's life, and serious property damage. Utility Model Content

[0006] The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art, to provide a door interlock for an inflatable cabinet, and to solve the technical problem of low reliability of the electrical interlock between the three-station mechanism and the cable room door in the current inflatable cabinet.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] Provided is a door interlock for an inflatable cabinet, characterized in that it includes:

[0009] An interlocking bracket, wherein a first locking plate and a second locking plate are provided at the front end of the interlocking bracket, and an elastic rotation connection is formed between the two locking plates and the interlocking bracket, and the two locking plates are suitable for locking the cabinet door of the cable compartment;

[0010] a first interlocking mechanism connected between the first lock plate and the three-position mechanism, wherein when the three-position mechanism is in the grounded and closed position, the first interlocking mechanism drives the first lock plate to unlock the cabinet door;

[0011] The second interlocking mechanism is connected between the second lock plate and the circuit breaker. When the circuit breaker is in the closing position, the second interlocking mechanism drives the second lock plate to unlock the cabinet door.

[0012] Furthermore, the first interlocking mechanism includes

[0013] A slide plate is slidably arranged on the interlocking bracket, and a stop pin is transversely arranged at the front end of the slide plate, and the stop pin is adapted to abut and cooperate with a rear inclined surface formed at the rear end of the first lock plate;

[0014] A first rotating rod is vertically arranged in the inflatable cabinet, with an upper crank arm provided at its upper end and a lower crank arm provided at its lower end, the upper crank arm being adapted to abut and cooperate with the driving plate of the three-station mechanism, a latch provided on the lower crank arm, a slide groove provided on the slide plate, and the latch inserted into the slide groove;

[0015] When the three-station mechanism is in the ground connection, the driving plate drives the lower crank arm to rotate synchronously through the upper crank arm, and the lower crank arm drives the slide plate to move forward through the latch pin and presses down the rear inclined surface of the first lock plate through the stop pin, so that the front end of the first lock plate is tilted to perform the unlocking action.

[0016] Furthermore, the second interlocking mechanism includes

[0017] A rotating bracket, wherein the rotating bracket is fixed;

[0018] A rotating plate, the rotating plate being arranged on the rotating bracket, wherein the lower front portion of the rotating plate abuts against the rear end of the second lock plate;

[0019] a first push rod, the first push rod being arranged vertically, the upper end of which is connected to the output shaft of the circuit breaker via an interlocking crank arm, and the lower end of which abuts against the rotating plate;

[0020] When the circuit breaker is in the closed position, the first push rod is driven to move downward, and the first push rod drives the rotating plate to flip downward. The rotating plate presses down the rear end of the second lock plate, causing the front end of the second lock plate to tilt up and perform an unlocking action.

[0021] Furthermore, the interlocking bracket is a U-shaped structure, and first guide grooves are provided on both sides of the interlocking bracket, and both ends of the stop pin are inserted into the first guide grooves;

[0022] The slide plate is a U-shaped structure, and second guide grooves are provided on both sides of the slide plate. A guide pin is provided in the interlocking bracket, and the guide pin passes through the second guide groove.

[0023] Furthermore, a third interlocking mechanism is provided on the door interlock, and the third interlocking mechanism includes

[0024] A rod seat, the rod seat being fixedly arranged;

[0025] A grounding rod is horizontally inserted into the rod seat, and a spring is provided between the grounding rod and the rod seat;

[0026] The second rotating rod has an upper rotating plate at its upper end and a lower rotating plate at its lower end. A reset torsion spring is provided on the second rotating rod.

[0027] The grounding push rod is located between the lower rotating plate and the cabinet door. When the cabinet door is opened, the grounding push rod extends forward under the action of the spring, so that the second rotating rod is reset and rotated under the action of the reset torsion spring, driving the upper rotating plate to block the opening plate of the circuit breaker.

[0028] Furthermore, tension springs are provided at the front ends of the first lock plate and the second lock plate and at the interlocking bracket.

[0029] The beneficial effects of the utility model are:

[0030] The door interlock for the gas cabinet of the present invention is a mechanical interlock, which has higher reliability than the electrical interlock, provides safety guarantee for the operation and maintenance of the gas cabinet, and reduces the probability of accidents due to misoperation.

[0031] It has simple structure, reliable performance, strong versatility, easy installation, and the sheet metal structure has high cost performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below with reference to the accompanying drawings.

[0033] Figure 1 and Figure 2 This is a schematic diagram of the door interlock for the inflatable cabinet of the present invention;

[0034] Figure 3 It is a schematic diagram of the interlocking bracket;

[0035] Figure 4is a schematic diagram of an interlocking bracket, a first lock plate, a second lock plate, and a slide plate;

[0036] Figure 5 is a schematic diagram of a rotating bracket and a rotating plate;

[0037] Figure 6 This is the door interlocking state diagram of the inflatable cabinet in isolation and closing;

[0038] Figure 7 This is the diagram of the inflatable cabinet in the isolated time-sharing door interlocking state;

[0039] Figure 8 This is the door interlocking state diagram when the inflatable cabinet is in the grounded state;

[0040] Among them, 1. Cabinet door;

[0041] 2. Interlocking bracket, 21. First lock plate, 22. Second lock plate, 23. Tension spring, 24. First guide groove;

[0042] 3. First interlocking mechanism, 31. Slide plate, 32. Stop pin, 33. First rotating rod, 34. Upper turning arm, 35. Lower turning arm;

[0043] 4. Second interlocking mechanism, 41. Rotating bracket, 42. Rotating plate, 43. First push rod;

[0044] 5. Third interlocking mechanism, 51. Rod seat, 52. Grounding push rod, 53. Spring, 54. Second rotating rod, 541. Upper rotating plate, 542. Lower rotating plate, 55. Reset torsion spring;

[0045] 6. Circuit breaker, 61. Disconnector plate, 62. Interlocking arm;

[0046] 7. Three-station mechanism, 71. Driving plate. DETAILED DESCRIPTION

[0047] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0048] This application provides a door interlock for an inflatable cabinet, which is described in detail below. It should be noted that the order in which the following embodiments are described does not limit the preferred order of the embodiments of this application. Furthermore, in the following embodiments, the description of each embodiment has its own emphasis. For portions not detailed in one embodiment, please refer to the relevant descriptions of other embodiments.

[0049] To solve the technical problem of low reliability of the electrical interlock between the three-position mechanism 7 and the cable compartment door in the prior art inflatable cabinets, an embodiment of the present application provides a door interlock for a gas cabinet, which is described in detail below.

[0050] An inflatable cabinet gas box unit is installed at the upper end of the cable room. A circuit breaker 6 and a three-position mechanism 7 are set in the inflatable cabinet gas box unit. The door interlock needs to meet the following requirements: 1. The cabinet door 1 of the cable room can only be opened when the circuit breaker 6 is closed and the three-position mechanism 7 is grounded and closed; 2. After the cabinet door 1 is opened, the circuit breaker 6 cannot be opened.

[0051] The door interlock of this embodiment can meet the above protection requirements.

[0052] like Figure 1 and Figure 2 As shown, a door interlock for an inflatable cabinet includes

[0053] An interlocking bracket 2, wherein a first locking plate 21 and a second locking plate 22 are provided at the front end of the interlocking bracket 2, and an elastic rotation connection is formed between the two locking plates and the interlocking bracket 2, and the two locking plates are suitable for locking the cabinet door 1 of the cable room;

[0054] The first interlocking mechanism 3 is connected between the first lock plate 21 and the three-position mechanism 7. When the three-position mechanism 7 is in the grounded position, the first interlocking mechanism 3 drives the first lock plate 21 to unlock the cabinet door 1;

[0055] The second interlocking mechanism 4 is connected between the second lock plate 22 and the circuit breaker 6. When the circuit breaker 6 is in the closing position, the second interlocking mechanism 4 drives the second lock plate 22 to unlock the cabinet door 1.

[0056] In this embodiment, the first lock plate 21 and the second lock plate 22 are both mounted on the interlock bracket 2 via a pin, so that the lock plate rotates on the interlock bracket 2. The front end of the lock plate forms a lock hook, which can cooperate with the lock hole on the cabinet door 1. The two lock plates are connected to the interlock bracket 2 via a tension spring 23. Under the action of the tension spring 23, the front ends of the first lock plate 21 and the second lock plate 22 always maintain a downward rotation trend. Figure 8 .

[0057] Specifically, as an optional implementation in this embodiment, Figures 6 to 8 As shown, the first interlocking mechanism 3 includes

[0058] A slide plate 31 is slidably mounted on the interlocking bracket 2. A stop pin 32 is disposed transversely at the front end of the slide plate 31. The stop pin 32 is adapted to abut against a rear inclined surface formed at the rear end of the first locking plate 21.

[0059] A first rotating rod 33 is vertically arranged in the inflatable cabinet, with an upper turning arm 34 provided at its upper end and a lower turning arm 35 provided at its lower end. The upper turning arm 34 is adapted to abut against the driving plate 71 of the three-station mechanism 7. A latch is provided on the lower turning arm 35. A slide groove is provided on the slide plate 31, and the latch is inserted into the slide groove.

[0060] When the three-station mechanism 7 is in the ground connection, the driving plate 71 drives the lower crank arm 35 to rotate synchronously through the upper crank arm 34, and the lower crank arm 35 drives the slide plate 31 to move forward through the latch and presses down the rear inclined surface of the first lock plate 21 through the stop pin 32, so that the front end of the first lock plate 21 is tilted to perform the unlocking action.

[0061] In this embodiment, the latch is a hexagon socket head screw.

[0062] As a preferred embodiment of this invention, Figure 3 As shown, the interlocking bracket 2 is a U-shaped structure, and first guide grooves 24 are provided on both sides of the interlocking bracket 2, and both ends of the stop pin 32 are inserted into the first guide grooves 24;

[0063] The slide plate 31 is a U-shaped structure, and second guide grooves are provided on both sides of the slide plate 31. A guide pin is provided in the interlocking bracket 2, and the guide pin passes through the second guide groove.

[0064] The interlocking bracket 2 is installed under the top plate of the cable room, with the U-shaped opening of the interlocking bracket 2 facing upward, and the slide 31 is located inside the interlocking bracket 2 with its U-shaped opening facing downward. The interlocking bracket 2 and the slide 31 are connected together by a stop pin 32 and a guide pin, so that the slide 31 can only move forward and backward inside the interlocking bracket 2.

[0065] like Figure 3 The interlocking bracket 2 shown has an escape groove at its bottom for evading the rear end of the second locking plate 22 .

[0066] Specifically, as an optional implementation in this embodiment, Figures 5 to 8 As shown, the second interlocking mechanism 4 includes

[0067] A rotating bracket 41, wherein the rotating bracket 41 is fixed;

[0068] A rotating plate 42 is provided on the rotating bracket 41 , and a lower front portion of the rotating plate 42 abuts against a rear end of the second locking plate 22 ;

[0069] A first push rod 43 is vertically arranged, with its upper end connected to the output shaft of the circuit breaker 6 via an interlocking crank arm 62 and its lower end abutting against the rotating plate 42;

[0070] When the circuit breaker 6 is in the closed position, the first push rod 43 is driven to move downward, and the first push rod 43 drives the rotating plate 42 to flip downward. The rotating plate 42 presses down the rear end of the second lock plate 22, causing the front end of the second lock plate 22 to tilt and perform an unlocking action.

[0071] In this embodiment, the rotating bracket 41 is also fixed under the top plate of the cable room, and the rotating plate 42 rotates on the rotating bracket 41. The lower front end of the rotating plate 42 is always in contact with the rear end of the second lock plate 22. When the rotating plate 42 flips downward, it can drive the second lock plate 22 to tilt up and unlock. In normal state, the rear end of the second lock plate 22 is in a tilted state, so it can abut against the rotating plate 42, so that the rotating plate 42 is in an upward lifted state.

[0072] A support column is provided on the top plate, and the first push rod 43 passes through the support column. The support column can guide the first push rod 43 to move vertically stably.

[0073] Specifically, as an optional implementation in this embodiment, Figures 6 to 8 As shown, the door interlock is further provided with a third interlock mechanism 5, which includes

[0074] A rod base 51, which is also fixed below the top plate of the cable room;

[0075] A grounding rod 52 is horizontally inserted into the rod seat 51. A spring 53 is provided between the grounding rod 52 and the rod seat 51. The spring 53 is sleeved on the grounding rod 52, and a retaining ring is provided on the grounding rod 52 to tighten and limit the rod.

[0076] The second rotating rod 54 has an upper end inserted into the inflatable cabinet and is provided with an upper rotating plate 541 and a lower rotating plate 542 at its lower end. A reset torsion spring 55 is provided on the second rotating rod 54. The upper rotating plate 541 cooperates with the opening plate 61 of the circuit breaker 6.

[0077] The grounding top rod 52 is located between the lower rotating plate 542 and the cabinet door 1. When the cabinet door 1 is opened, the grounding top rod 52 extends forward under the action of the spring 53, so that the second rotating rod 54 is reset and rotated under the action of the reset torsion spring 55, driving the upper rotating plate 541 to block the opening plate 61 of the circuit breaker 6. After the upper rotating plate 541 blocks the opening plate 61, the circuit breaker 6 can be restricted from opening.

[0078] In this embodiment, a rod bracket is installed on the top plate (or the bottom plate of the mechanism chamber), and the grounding top rod 52 vertically passes through the rod bracket, which ensures that the grounding top rod 52 can move horizontally back and forth.

[0079] The use process of the utility model door interlock:

[0080] like Figure 6As shown, when isolating and closing, the three-station mechanism is operated to isolate and close the switch in place, the drive plate 71 of the three-station mechanism 7 does not move, the first rotating rod 33 does not rotate, the slide plate 31 is in the initial position (not moving forward), the first lock plate 21 is not pushed open, and the first lock plate 21 is in a locked position due to the tension of the tension spring 23 (the first lock plate 21 hooks the grounding interlocking plate on the cable room door), and the cable room door cannot be opened. Then, the circuit breaker 6 is operated to close the switch, and the interlocking arm 62 on the main shaft presses down the first push rod 43, and the first push rod 43 pushes open the lower rotating plate 42, and the rotating plate 42 presses down the second lock plate 22. The rear end of the second lock plate 22 rotates and lifts upward under the downward pressure, and the hook disengages from the grounding interlocking plate of the cable room door. The first lock plate 21 hooks the grounding interlocking plate on the cable room door, and the cable room door cannot be opened.

[0081] like Figure 7 As shown, during isolation and tripping, the circuit breaker 6 is operated to open, and the interlocking arm 62 on the main shaft pulls the first push rod 43 upward. The rotating plate 42 begins to reset under the action of the second lock plate 22. The rotating plate 42 remains in its initial position. The second lock plate 22 is pulled by the tension spring 23, and the hook hooks the grounding interlock plate, preventing the cable compartment door from opening. The three-position mechanism 7 is operated to isolate and open in place, and the drive plate 71 of the three-position mechanism 7 does not operate (the operating state is the same as when the three-position mechanism is isolated and closed).

[0082] like Figure 8 As shown, when grounding is closed, the three-position mechanism 7 is operated to close the switch, and the drive plate 71 of the three-position mechanism 7 moves to the right, driving the first rotating rod 33 to rotate. The first rotating rod 33 drives the slide plate 31 to move forward through the lower crank arm 35, and the first lock plate 21 is pushed open. The hook of the first lock plate 21 disengages from the grounding interlocking plate on the cable compartment door. When the circuit breaker 6 is operated to close, the interlocking crank arm 62 on the main shaft presses down the first push rod 43, and the first push rod 43 pushes open the rotating plate 42. The rotating plate 42 presses down on the rear end of the second lock plate 22. The second lock plate 22 rotates upward under the downward pressure, and the hook of the second lock plate 22 disengages from the grounding interlocking plate. At this time, the cable compartment door is opened.

[0083] When the cabinet door 1 is closed, the grounding rod 52 is always against the cabinet door 1. When the cabinet door 1 is opened, the grounding rod 52 extends forward under the action of the spring 53. At this time, the second rotating rod 54 is reset under the action of the reset torsion spring 55, driving the upper rotating plate 541 to cover the trip plate 61 of the circuit breaker 6. After maintenance is completed, the cable compartment door must be closed. At this time, the cabinet door 1 abuts the grounding rod 52. The grounding rod 52 moves horizontally and drives the second rotating rod 54 to rotate, thereby disengaging the upper rotating plate 541 from the restriction on the trip plate 61, so that power can be supplied.

[0084] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0085] In the description of the embodiments of the present invention, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0086] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0087] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. There may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interface, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms.

[0088] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0089] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0090] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A door interlock for an inflatable cabinet, characterized in that: include An interlocking bracket (2), wherein a first locking plate (21) and a second locking plate (22) are provided at the front end of the interlocking bracket (2), wherein the two locking plates are elastically rotatably connected to the interlocking bracket (2), and the two locking plates are suitable for locking the cabinet door (1) of the cable chamber; a first interlocking mechanism (3), the first interlocking mechanism (3) being connected between the first lock plate (21) and the three-position mechanism (7); when the three-position mechanism (7) is in the grounded position, the first interlocking mechanism (3) drives the first lock plate (21) to unlock the cabinet door (1); A second interlocking mechanism (4) is connected between the second lock plate (22) and the circuit breaker (6). When the circuit breaker (6) is in the closing position, the second interlocking mechanism (4) drives the second lock plate (22) to unlock the cabinet door (1).

2. The door interlock for the inflatable cabinet according to claim 1, characterized in that: The first interlocking mechanism (3) comprises A slide plate (31) is slidably arranged on the interlocking bracket (2), and a stop pin (32) is transversely arranged at the front end of the slide plate (31), and the stop pin (32) is suitable for abutting and cooperating with a rear inclined surface formed at the rear end of the first lock plate (21); A first rotating rod (33) is vertically arranged in the inflatable cabinet, an upper turning arm (34) is arranged at its upper end, and a lower turning arm (35) is arranged at its lower end, the upper turning arm (34) is suitable for abutting and cooperating with the driving plate (71) of the three-station mechanism (7), a latch is arranged on the lower turning arm (35), a slide groove is provided on the slide plate (31), and the latch is inserted into the slide groove; When the three-station mechanism (7) is in the grounding state, the driving plate (71) drives the lower crank arm (35) to rotate synchronously through the upper crank arm (34), and the lower crank arm (35) drives the slide plate (31) to move forward through the stop pin (32) to press down the rear inclined surface of the first lock plate (21), so that the front end of the first lock plate (21) is tilted to perform the unlocking action.

3. The door interlock for the inflatable cabinet according to claim 1, characterized in that: The second interlocking mechanism (4) comprises A rotating bracket (41), wherein the rotating bracket (41) is fixedly arranged; A rotating plate (42), the rotating plate (42) is arranged on the rotating bracket (41), and the lower front portion of the rotating plate (42) abuts against the rear end of the second locking plate (22); A first push rod (43), the first push rod (43) is arranged vertically, the upper end of which is connected to the output shaft of the circuit breaker (6) through an interlocking crank arm (62), and the lower end of which abuts against the rotating plate (42); When the circuit breaker (6) is in the closed position, the first push rod (43) is driven to move downward, and the first push rod (43) drives the rotating plate (42) to turn downward, and the rotating plate (42) presses down the rear end of the second lock plate (22), so that the front end of the second lock plate (22) is tilted to perform an unlocking action.

4. The door interlock for the inflatable cabinet according to claim 2, wherein: The interlocking bracket (2) is a U-shaped structure, and first guide grooves (24) are provided on both sides of the interlocking bracket (2), and both ends of the blocking pin (32) are inserted into the first guide grooves (24); The slide plate (31) is a U-shaped structure, with second guide grooves provided on both sides of the slide plate (31), and a guide pin is provided in the interlocking bracket (2), and the guide pin passes through the second guide groove.

5. The door interlock for the inflatable cabinet according to claim 2, characterized in that: The door interlock is also provided with a third interlock mechanism (5), the third interlock mechanism (5) comprising A rod seat (51), wherein the rod seat (51) is fixedly arranged; A grounding rod (52) is horizontally inserted into the rod seat (51), and a spring (53) is provided between the grounding rod (52) and the rod seat (51); The second rotating rod (54) has an upper rotating plate (541) at its upper end and a lower rotating plate (542) at its lower end. A return torsion spring (55) is provided on the second rotating rod (54). The grounding top rod (52) is located between the lower rotating plate (542) and the cabinet door (1). When the cabinet door (1) is opened, the grounding top rod (52) extends forward under the action of the spring (53), thereby causing the second rotating rod (54) to perform a reset rotation under the action of the reset torsion spring (55), thereby driving the upper rotating plate (541) to block the opening plate (61) of the circuit breaker (6).

6. The door interlock for the inflatable cabinet according to claim 1, characterized in that: Tension springs (23) are provided at the front ends of the first lock plate (21) and the second lock plate (22) and the interlocking bracket (2).

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