A circuit breaker combination switchgear and switchboard

Abstract

The application relates to the technical field of circuit breaker combination switches, and discloses a circuit breaker combination switch device and a switch cabinet, wherein the circuit breaker combination switch device comprises a cabinet body, static and dynamic contacts, a circuit breaker arranged in the cabinet body, an opening coil and a closing coil arranged at the upper end of the circuit breaker, and a locking unit arranged at the upper end of the circuit breaker, wherein the locking unit comprises a reset component and a locking component arranged on the side wall of the circuit breaker; by designing the locking unit, the connecting rod and the closing spring used in the prior art are abandoned, the static and dynamic contacts can be locked when being reset, the static and dynamic contacts can be completely reset, an electromagnet and a pressure sensor are designed, whether the static and dynamic contacts are completely reset can be judged through the pressure sensor, and the static and dynamic contacts are locked only when the static and dynamic contacts are completely reset, so that the safety and reliability of the equipment are effectively improved.

Description

Technical Field

[0001] This invention relates to the technical field of circuit breaker combination switches, and more particularly to a circuit breaker combination switchgear and switch cabinet. Background Technology

[0002] Circuit breaker combination switches are integrated electrical components developed in the field of electrical power distribution to address the safety shortcomings of common circuit breakers and adapt to the high safety management requirements of industrial scenarios. Essentially, they are a combination of the core protection function of circuit breakers and the safety management function of mechanical locking. Their birth and development have always revolved around the two core demands of "electrical operation safety" and "operation and maintenance standard management". Before the advent of circuit breaker combination switches, conventional circuit breakers only had circuit switching and overload, short circuit and undervoltage protection functions. In scenarios such as industrial production, complete power distribution and special equipment, obvious safety shortcomings were exposed, which directly promoted the integrated innovation of "circuit breaker and locking mechanism".

[0003] There is a problem with existing circuit breakers and locking mechanisms where incomplete reset during opening and closing can prevent proper locking. When the internal connecting rods or springs of the circuit breaker are worn or deformed, the opening and closing cannot proceed smoothly. For example, fatigue of the closing spring or insufficient energy storage can prevent the stationary and moving contacts from locking after closing. These unstable factors can all cause the stationary and moving contacts to be locked. If the circuit breaker fails to reset properly, false closing / false opening may occur. Maintenance personnel may misjudge the status, leading to operational errors, such as performing live maintenance as if the circuit has already opened, which could result in the risk of electric shock.

[0004] Meanwhile, during the opening and closing reset process, if the locking mechanism locks the stationary and moving contacts first during the reset process, and the stationary and moving contacts are not fully reset, the stationary and moving contacts may become stuck, making it impossible to complete the opening and closing operation. This would require subsequent personnel to disassemble and repair the circuit breaker, affecting the work efficiency of the personnel and increasing the workload.

[0005] Therefore, it is necessary to design a circuit breaker combination switch that can effectively prevent the static and moving contacts from failing to reset properly during opening and closing. Summary of the Invention

[0006] In view of the problem that the moving and stationary heads do not reset properly during opening and closing of the circuit breaker in the existing technology, resulting in false closing / false opening, a circuit breaker combination switchgear and switch cabinet are proposed.

[0007] This application provides a circuit breaker combination switchgear and switch cabinet, the purpose of which is to: by designing a locking unit, eliminate the existing linkage and closing spring, lock the stationary and moving contacts when they are reset, and ensure that the stationary and moving contacts can be fully reset. By designing an electromagnet and a pressure sensor, the pressure sensor can determine whether the stationary and moving contacts have been fully reset, and the stationary and moving contacts will only be locked when they have been fully reset, effectively improving the safety and reliability of the equipment.

[0008] The technical solution of the present invention is as follows: a circuit breaker combination switchgear, including a cabinet and stationary and moving contacts, a circuit breaker body disposed inside the cabinet, a tripping coil and a closing coil disposed on the upper end of the circuit breaker body, and a locking unit disposed on the upper end of the circuit breaker body, the locking unit including a reset component and a locking component disposed on the side wall of the circuit breaker body.

[0009] The reset component includes a locking block disposed on the side wall of the circuit breaker body, a mounting groove opened inside the locking block, an electromagnet disposed inside the mounting groove, stroke blocks disposed at the upper and lower ends of the inner wall of the mounting groove, a sliding groove opened on the stroke blocks, a suction plate slidably disposed inside the sliding groove, a sensing cylinder disposed inside the mounting groove, and a sensing component installed between the suction plate and the sensing cylinder.

[0010] The sensing component includes a squeezing plate slidably disposed inside the sensing cylinder, a connecting rod disposed between the squeezing plate and the suction plate, and a ventilation groove formed on the side wall of the sensing cylinder. When the squeezing plate moves inside the sensing cylinder, it is divided into a first stroke and a second stroke. The first stroke is the ventilation groove area, and the second stroke is the area between the left side wall of the sensing cylinder and the ventilation groove. In the initial state, when the squeezing plate is located at the point in the ventilation groove furthest from the stroke block, the stationary and moving contacts are in the working state. When the squeezing plate is in the second stroke, the stationary and moving contacts are in the open state. The stationary and moving contacts are used for the control of opening and closing the gate. The connecting rod is sealed and slides through the bottom wall of the sensing cylinder.

[0011] Furthermore, one end of the stationary and moving contacts is rotatably mounted on the side wall of the extrusion plate, and an electromagnet is used to control the extension and reset of the stationary and moving contacts.

[0012] Furthermore, the locking component includes a connecting pipe disposed on the side wall of the sensing cylinder, a flow groove opened inside the locking block, a flow pipe disposed inside the flow groove, one end of the connecting pipe away from the sensing cylinder being connected to one end of the flow pipe, and a placement groove opened inside the locking block, wherein a triggering component is installed inside the placement groove.

[0013] Furthermore, the triggering component includes a locking cylinder disposed inside the placement groove, a piston plate disposed inside the locking cylinder, a flow tube located below the piston plate, a gravity block disposed at the lower end of the piston plate, and a locking element disposed at the upper end of the piston plate.

[0014] Furthermore, the locking component includes a locking rod disposed on the upper end of the piston plate, and locking grooves that cooperate with it are provided on the outer wall of both the stationary and moving contacts. When the stationary and moving contacts are in the open state, one end of the locking rod is located inside the corresponding locking groove.

[0015] Furthermore, a miniature electric valve is fixedly installed at the lower end of the locking cylinder, and a one-way valve is fixedly installed on the side wall of the sensing cylinder.

[0016] Furthermore, the distance traveled by the stationary and moving contacts during opening and closing is equal to the sum of the distances of the first and second strokes.

[0017] Furthermore, the electromagnet and the miniature electric valve are electrically connected to each other, and a pressure sensor is installed inside the suction plate to monitor the magnitude of the electromagnet's attraction force on the suction plate in real time.

[0018] Furthermore, a switch cabinet includes a circuit breaker combination switchgear, and further includes the following structures: a gas box, a main circuit, a circuit breaker mechanism, an integrated mechanism, a busbar and bushings, wherein the gas box, the circuit breaker combination switchgear, the main circuit, the circuit breaker mechanism, the integrated mechanism, the busbar and bushings are all located inside the switch cabinet.

[0019] The beneficial effects of this invention are:

[0020] 1. By designing a reset component and controlling the current direction of the electromagnet, the extension and reset of the stationary and moving contacts can be precisely controlled. Furthermore, by eliminating the traditional transmission rod and spring, the wear and fatigue of these components during operation can be effectively avoided, preventing the stationary and moving contacts from failing to reset properly. By setting up a suction plate, friction during operation can be effectively reduced, extending the service life of the equipment. Moreover, the electromagnet reacts quickly, enabling rapid response when opening and closing circuits, thus improving the flexibility and applicability of the equipment.

[0021] 2. By setting a locking component and an induction cylinder, and by setting a first stroke and a second stroke inside the induction cylinder, the locking component and the reset component work together to ensure that the stationary and moving contacts are only locked by triggering the locking component after the stationary and moving contacts have been fully reset and the circuit has been fully opened and closed. This avoids the situation where the stationary and moving contacts are stuck due to the locking mechanism locking prematurely during the reset process, thereby improving the overall flexibility and safety of the equipment during operation and effectively extending the service life of the equipment.

[0022] 3. By setting pressure sensors and miniature electric valves, when opening and closing the circuit breaker is required, the equipment can immediately depressurize the inside of the locking cylinder, allowing the piston plate to quickly reset under the gravity of the gravity block, thereby quickly unlocking the locking of the stationary and moving contacts. Subsequently, the stationary and moving contacts are quickly extended to realize the opening and closing of the circuit breaker, effectively improving the efficiency of the equipment and enhancing the overall flexibility of the equipment. Attached Figure Description

[0023] Figure 1 This is a partial sectional view of the electrical cabinet.

[0024] Figure 2 This is a three-dimensional structural diagram of the circuit breaker of the present invention;

[0025] Figure 3This is a schematic cross-sectional view of the locking block structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the internal structure of the induction cylinder of the present invention;

[0027] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle;

[0028] Figure 6 This is a schematic diagram of the reset component structure of the present invention.

[0029] In the picture:

[0030] 1. Cabinet; 2. Stationary and moving contacts; 3. Circuit breaker body; 4. Opening coil; 5. Closing coil; 101. Locking block; 102. Mounting slot; 103. Electromagnet; 104. Stroke block; 105. Sliding slot; 106. Attraction plate; 107. Induction cylinder; 201. Squeezing plate; 202. Connecting rod; 203. Ventilation slot; 301. Connecting pipe; 302. Flow pipe; 303. Placement slot; 401. Locking cylinder; 402. Piston plate; 403. Gravity block; 404. Locking rod; 405. Locking slot; 406. Miniature electric valve; 407. Check valve. Detailed Implementation

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] Example 1, referring to Figures 1-4 The first embodiment of the present invention provides a circuit breaker combination switchgear, including a cabinet 1 and stationary and moving contacts 2, a circuit breaker body 3 fixedly installed inside the cabinet 1, a tripping coil 4 and a closing coil 5 fixedly installed on the upper end of the circuit breaker body 3, and a locking unit installed on the upper end of the circuit breaker body 3. The locking unit includes a reset component and a locking component installed on the side wall of the circuit breaker body 3.

[0033] The reset component includes a locking block 101 fixedly installed on the side wall of the circuit breaker body 3, a mounting groove 102 opened inside the locking block 101, an electromagnet 103 fixedly installed inside the mounting groove 102, travel blocks 104 slidably installed at the upper and lower ends of the inner wall of the mounting groove 102, a sliding groove 105 opened on the travel block 104, a suction plate 106 slidably installed inside the sliding groove 105, and a sensing cylinder 107 fixedly installed inside the mounting groove 102. A sensing component is installed between the suction plate 106 and the sensing cylinder 107.

[0034] The sensing assembly includes a pressing plate 201 slidably mounted inside the sensing cylinder 107, a connecting rod 202 fixedly mounted between the pressing plate 201 and the suction plate 106, and a venting groove 203 formed on the side wall of the sensing cylinder 107. The pressing plate 201 moves within the sensing cylinder 107 in two phases: a first stroke and a second stroke. The first stroke is within the venting groove 203 area, and the second stroke is between the left side wall of the sensing cylinder 107 and the venting groove 203. Initially, when the pressing plate 201 is at the point in the venting groove 203 furthest from the stroke block 104, the stationary contact 2 is in the working state. When the pressing plate 201 is in the second stroke, the stationary contact 2 is in the open state. The stationary contact 2 is used for opening and closing the circuit breaker. The connecting rod 202 slides through the bottom wall of the sensing cylinder 107 in a sealed manner. One end of the stationary contact 2 is rotatably mounted on the side wall of the pressing plate 201, and an electromagnet 103 is used to control the extension and resetting of the stationary contact 2.

[0035] Specifically, the reset component uses electromagnet 103 and connecting rod 202 for direct transmission to control the extension and reset of the stationary and moving contacts 2, directly replacing the traditional transmission method of connecting rod and spring combination. Because the closed state is maintained for a long time, the spring at the open position needs to always be kept in a compressed state (partially in an extended state), that is, the spring is in an energy storage state for a long time. When the spring is in this state for a long time, fatigue will occur, resulting in a slower subsequent transmission speed or incomplete reset of the stationary and moving contacts 2. If the reset is incomplete, and the closing spring is fatigued or has insufficient energy storage, the stationary and moving contacts 2 cannot be locked after closing. These unstable factors will all cause the stationary and moving contacts 2 to be locked. If the circuit breaker fails to reset properly, false closing / false opening will occur, and maintenance personnel will misjudge the status, leading to operational errors, such as thinking that it has already opened and performing live maintenance, which will cause the risk of electric shock.

[0036] This invention utilizes an electromagnet 103, which is directly controlled by a control system (not shown in the figure). When a short circuit or overload occurs in the circuit, the control system quickly controls the corresponding stationary contact 2 to close the circuit, cutting off the circuit to ensure line safety. Furthermore, by changing the direction of the current flowing inside the electromagnet 103, the opening and closing of the circuit can be synchronously controlled, eliminating the need for manual reset. This method is simple to operate and highly automated. Controlling the opening and closing using the attraction force of the electromagnet 103 effectively reduces component friction, improving the lifespan of the equipment and the quality of opening and closing. In conjunction with Embodiment 2, this invention enables rapid reset of the circuit while simultaneously locking the stationary contact 2. Locking is only achieved when the stationary contact 2 is fully reset to the open position. By incorporating a pressure sensor, when the pressure plate 201 experiences a certain degree of attraction (indicating that the stationary contact 2 is fully reset and locked), the operator can directly observe this through the controller.

[0037] The suction plate 106 is made of magnet. When the electromagnet 103 generates current, the suction plate 106 can be subjected to a corresponding attraction force or repulsion force (determined by the direction of the current in the electromagnet 103). The sliding groove 105 on the stroke block 104 is used to limit the suction plate 106, so that when the suction plate 106 is affected by the electromagnet 103, it can move freely on the horizontal line. The suction plate 106 drives the corresponding pressing plate 201 to move through the connecting rod 202, thereby driving the extension and retraction of the stationary and moving contacts 2 to realize the opening and closing of the circuit.

[0038] Example 2, refer to Figures 4-6 This is a second embodiment of the present invention, which differs from the first embodiment in that: the locking component includes a connecting pipe 301 fixedly installed on the side wall of the sensing cylinder 107, a flow groove formed inside the locking block 101, a flow pipe 302 fixedly installed inside the flow groove, one end of the connecting pipe 301 away from the sensing cylinder 107 communicating with one end of the flow pipe 302, and a placement groove 303 formed inside the locking block 101, wherein a triggering component is installed inside the placement groove 303. The triggering component includes a locking cylinder 401 fixedly installed inside the placement groove 303, a piston plate 402 slidably installed inside the locking cylinder 401, the flow pipe 302 located below the piston plate 402, a gravity block 403 fixedly installed at the lower end of the piston plate 402, and a locking member installed at the upper end of the piston plate 402. The locking mechanism includes a locking rod 404 fixedly mounted on the upper end of the piston plate 402. Locking grooves 405 are formed on the outer wall of both the stationary and moving contacts 2 to mate with the locking rod 404. When the stationary and moving contacts 2 are in the open state, one end of the locking rod 404 is precisely located inside the corresponding locking groove 405. A miniature electric valve 406 is fixedly mounted on the lower end of the locking cylinder 401, and a one-way valve 407 is fixedly mounted on the side wall of the sensing cylinder 107. The moving distance of the stationary and moving contacts 2 during opening and closing is equal to the sum of the first and second stroke distances. The electromagnet 103 and the miniature electric valve 406 are electrically connected to each other. A pressure sensor is installed inside the suction plate 106 to monitor the magnitude of the attraction force exerted on the suction plate 106 by the electromagnet 103 in real time.

[0039] Specifically, the locking component is used to lock the stationary contact 2. Through a rationally designed structure, this invention ensures that the stationary contact 2 can only be locked after it has fully reset. The specific principle is as follows: After the extrusion plate 201 completes its first stroke, it enters the second stroke region. Upon entering the second stroke region, the extrusion plate 201 and the sensing cylinder 107 are in a relatively sealed area. If the extrusion plate 201 continues to move in the second stroke region, it will compress the gas inside the sensing cylinder 107 into the locking cylinder 401. By changing the air pressure inside the locking cylinder 401, the piston plate 402 rises vertically. During the rise of the piston plate 402, the locking rod 404 moves upward synchronously. When the stationary contact 2 moves horizontally, its locking groove 405 is directly above the locking rod 404. When the locking rod 404 continues to move upward, it enters the locking groove 405 to lock the stationary contact 2. The miniature electric valve 406 is electrically connected to the controller. When it is necessary to release the lock on the stationary contact 2, the controller controls the miniature electric valve 406 to open. The piston plate 402 moves rapidly downward under the action of the gravity block 403, and discharges the gas, thus releasing the lock on the stationary contact 2. At the same time, the one-way valve 407 can replenish the gas inside the sensing cylinder 107, which facilitates the subsequent reverse movement of the extrusion plate 201.

[0040] By setting a pressure sensor, when the extrusion plate 201 moves to the second stroke and extrudes the internal space of the locking cylinder 401, and the locking rod 404 completely locks the stationary and moving contact 2, the extrusion plate 201 cannot continue to move under pressure, and the pressure of the electromagnet 103 on the surface of the suction plate 106 increases. Through this change, it is possible to determine whether the locking rod 404 is completely locked. By electrically connecting the pressure sensor to the controller and synchronizing the monitoring data with the controller, the controller can promptly determine the status of the locking rod 404 and issue commands, effectively improving the overall flexibility of the equipment.

[0041] The distance between the two initial states of the stationary and moving contacts 2 (opening and closing) is equal to the sum of the distances of the first and second strokes. This ensures that when the stationary and moving contacts 2 complete their movement, the locking position can be precisely controlled, and at the same time, when they are fully reset, the above steps can be completed just in time, thereby achieving coordinated operation of the two.

[0042] The remaining structure is the same as that in Example 1.

[0043] Example 3, referring to Figures 1-2 A switch cabinet includes a circuit breaker combination switchgear, and further includes the following structures: gas box, main circuit, circuit breaker mechanism, integrated mechanism, busbar and bushing, wherein the gas box, circuit breaker combination switchgear, main circuit, circuit breaker mechanism, integrated mechanism, busbar and bushing are all located inside the switch cabinet.

[0044] The remaining structure is the same as that in Example 2.

[0045] Based on embodiments 1-3, the working principle of the present invention is as follows: When the circuit breaker is working inside the cabinet 1, if a short circuit or overload occurs in the circuit of the cabinet 1, the circuit needs to be disconnected. The controller monitoring the current inside the cabinet 1 transmits an electrical signal to the corresponding electromagnet 103. Current flows into the electromagnet 103, generating a suction force on the suction plate 106. The suction plate 106 is initially in the opening position of the induction cylinder 107 (at this time, the stationary contact 2 extends to its maximum length and is in the closed state). After being attracted, it moves towards the electromagnet 103, and drives the pressing plate 201 to move synchronously through the connecting rod 202. At this time, the pressing plate 201 moves in the first stroke area of ​​the induction cylinder 107. During the movement, the pressing plate 201 drives the stationary contact 2 on one side to move synchronously, so that the stationary contact 2 no longer connects to the circuit, thereby completing the power-off operation. The stationary contact 2 continues to move to reset. When it moves to the second stroke, it begins to lock the stationary contact 2.

[0046] When the extrusion plate 201 moves to the second stroke of the sensing cylinder 107, the extrusion plate 201 extrudes the second stroke space of the sensing cylinder 107, and extrudes the gas in the second stroke area through the connecting pipe 301 and the flow pipe 302 into the locking cylinder 401, which increases the pressure inside the locking cylinder 401. During the increase, the piston plate 402 inside the locking cylinder 401 slides upward under the action of pressure. During the sliding process, it drives the upper locking rod 404 to move upward. During the upward movement, the stationary contact 2 and the locking groove 405 on its outer wall move horizontally. When the locking rod 404 rises to the highest height, the locking rod 404 just enters the locking groove 405 to lock the stationary contact 2. After the locking is completed, the piston plate 402 can no longer move upward, and the suction plate 106 cannot relieve the force, which causes the suction force on its surface to increase. At this time, the pressure sensor detects that the pressure has increased, closes the electromagnet 103, and thus completes the reset and locking of the stationary contact 2.

[0047] When the short circuit or overload problem is resolved, the circuit needs to be closed. At this time, the controller opens the miniature electric valve 406. The piston plate 402 moves rapidly downward under the gravity of the gravity block 403, and the high-pressure gas in the lower area is discharged through the miniature electric valve 406. This generates a reverse current in the electromagnet 103, which generates a repulsive force on the suction plate 106. After being repelled, the suction plate 106 resets horizontally, which in turn drives the stationary and moving contacts 2 to reset synchronously. When the stationary and moving contacts 2 contact the circuit, the suction plate 106 cannot release the force, causing its surface pressure to increase. When the pressure sensor detects that the pressure exceeds the set value, the controller closes the electromagnet 103. At this time, the circuit is in a connected state. If the circuit fails again, the above operation is repeated.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A circuit breaker combination switchgear, comprising a cabinet (1) and stationary and moving contacts (2), a circuit breaker body (3) disposed inside the cabinet (1), and a tripping coil (4) and a closing coil (5) disposed on the upper end of the circuit breaker body (3), characterized in that, It also includes a locking unit located at the upper end of the circuit breaker body (3), the locking unit including a reset component and a locking component located on the side wall of the circuit breaker body (3); The reset component includes a locking block (101) disposed on the side wall of the circuit breaker body (3), a mounting groove (102) opened inside the locking block (101), an electromagnet (103) disposed inside the mounting groove (102), a travel block (104) respectively disposed at the upper and lower ends of the inner wall of the mounting groove (102), a sliding groove (105) opened on the travel block (104), a suction plate (106) slidably disposed inside the sliding groove (105), and a sensing cylinder (107) disposed inside the mounting groove (102). A sensing component is installed between the suction plate (106) and the sensing cylinder (107). The sensing component includes a pressing plate (201) slidably disposed inside the sensing cylinder (107), a connecting rod (202) disposed between the pressing plate (201) and the suction plate (106), and a ventilation groove (203) opened on the side wall of the sensing cylinder (107). When the pressing plate (201) moves inside the sensing cylinder (107), it is divided into a first stroke and a second stroke. The first stroke is the area of ​​the ventilation groove (203), and the second stroke is the area between the left side wall of the sensing cylinder (107) and the ventilation groove (203). In the initial state, when the pressing plate (201) is located at the point of the ventilation groove (203) furthest from the stroke block (104), the stationary contact (2) is in the working state. When the pressing plate (201) is in the second stroke, the stationary contact (2) is in the open state. The stationary contact (2) is used for the control of opening and closing the gate. The connecting rod (202) is sealed and slides through the bottom wall of the sensing cylinder (107).

2. The circuit breaker combination switchgear according to claim 1, characterized in that, One end of the stationary contact (2) is rotatably mounted on the side wall of the extrusion plate (201), and the electromagnet (103) is used to control the extension and reset of the stationary contact (2).

3. A circuit breaker combination switchgear according to claim 1, characterized in that, The locking component includes a connecting pipe (301) disposed on the side wall of the sensing cylinder (107), a flow groove opened inside the locking block (101), a flow pipe (302) disposed inside the flow groove, one end of the connecting pipe (301) away from the sensing cylinder (107) being connected to one end of the flow pipe (302), and a placement groove (303) opened inside the locking block (101), wherein a triggering component is installed inside the placement groove (303).

4. A circuit breaker combination switchgear according to claim 3, characterized in that, The triggering component includes a locking cylinder (401) disposed inside the placement slot (303), a piston plate (402) disposed inside the locking cylinder (401), a flow tube (302) located below the piston plate (402), a gravity block (403) disposed at the lower end of the piston plate (402), and a locking element disposed at the upper end of the piston plate (402).

5. A circuit breaker combination switchgear according to claim 4, characterized in that, The locking component includes a locking rod (404) disposed on the upper end of the piston plate (402), and a locking groove (405) that matches the moving contact (2) is provided on the outer wall of the moving contact (2). When the moving contact (2) is in the open state, one end of the locking rod (404) is located inside the corresponding locking groove (405).

6. A circuit breaker combination switchgear according to claim 5, characterized in that, A miniature electric valve (406) is fixedly installed at the lower end of the locking cylinder (401), and a one-way valve (407) is fixedly installed on the side wall of the sensing cylinder (107).

7. A circuit breaker combination switchgear according to claim 1, characterized in that, When the stationary and moving contacts (2) open and close, the distance they travel is equal to the sum of the distances of the first and second strokes.

8. A circuit breaker combination switchgear according to claim 7, characterized in that, The electromagnet (103) and the miniature electric valve (406) are electrically connected to each other. The suction plate (106) is equipped with a pressure sensor to monitor the magnitude of the suction force of the electromagnet (103) on the suction plate (106) in real time.

9. A switch cabinet, characterized in that, The circuit breaker combination switchgear as described in claim 8 further includes the following structures: gas box, main circuit, circuit breaker mechanism, integrated mechanism, busbar and bushing, wherein the gas box, circuit breaker combination switchgear, main circuit, circuit breaker mechanism, integrated mechanism, busbar and bushing are all located inside the switch cabinet.

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