A fast-responding arc burning pressure relief device and an arc burning processing method for smart grid

Abstract

The application relates to the technical field of smart grids, in particular to a fast-response arc burning pressure relief device and an arc burning treatment method for a smart grid, which is arranged in a cabinet body and comprises three pressure relief cover plates arranged at the top of the cabinet body and corresponding to three compartments of a busbar chamber, a circuit breaker chamber and a cable chamber, further comprising: a locking mechanism arranged in the cabinet body and connected with the pressure relief cover plates, so that the pressure relief cover plates are kept in a closed state, and the locking mechanism is further connected with a driven mechanism; a cylinder installed in the cabinet body, an elastic moving mechanism is arranged in the cylinder, the elastic moving mechanism is connected with a first elastic telescopic rod, and a convex column matched with the driven mechanism is connected with a moving part of the first elastic telescopic rod; according to the pressure surge characteristics in the compartment when the arc burning phenomenon occurs, the piston disc drives the first elastic telescopic rod to rapidly deflect, so that the track radius of the convex column is increased under the action of centrifugal force, the automatic pressure relief function based on the pressure change rate is realized, and the maintenance cost and intensity are effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of smart grid technology, specifically a fast-response arc-relieving device and a method for handling arcing in smart grids. Background Technology

[0002] Modern smart grids prioritize "unmanned operation" and remote monitoring, typically without permanent on-site personnel. However, in the event of an uncontrolled arcing accident, the inability to respond promptly on-site can have extremely serious consequences. While the power grid excels in automation, digitization, and real-time monitoring, its physical layer still consists of traditional electrical equipment such as switchgear, busbars, and circuit breakers. If an arcing fault occurs inside a switchgear unit, the fault energy can surge to several times the surface temperature of the sun within milliseconds, accompanied by a violent explosive pressure wave. Therefore, reliable pressure relief measures must be designed for the switchgear unit.

[0003] The busbar compartment, circuit breaker compartment, and cable compartment within the switchgear are not directly connected (or only have a very small pressure balancing hole), each forming a relatively independent sealed volume space. Each compartment requires a separate pressure relief cover. Existing pressure relief methods mostly rely on static air pressure to forcefully press against nylon bolts or tearing weak bends. When the air pressure accumulates to a level sufficient to overcome the shear strength of the nylon bolts or the tear strength of the bends, the cover is violently forced open around the hinged end, causing the nylon bolts to break. This type of solution is a one-time failure, cannot be reset, and requires manual replacement of the bolts afterward, resulting in high maintenance costs.

[0004] To address this, some pressure relief devices are equipped with pressure, temperature, or arc flash sensors to monitor the cabinet's internal status in real time. When the pressure reaches a preset threshold, the pressure relief cover is automatically opened by an electromagnetic drive source or an actuator such as an explosion bolt. However, this method carries the risk of misjudgment. For example, factors such as a sudden increase in load, a rapid rise in ambient temperature, or operational overvoltage can all cause the pressure inside the cabinet to rise. However, the pressure rise rate under these conditions is far lower than the millisecond-level sudden rise characteristic of an arcing fault, and the high-pressure environment is formed relatively slowly. If the pressure relief cover is opened erroneously at this time, it will damage the original sealing environment of the cabinet, leading to the intrusion of dust and moisture, which will in turn affect the normal operation and insulation performance of the equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a fast-response arc-relieving device and an arc-handling method for smart grids, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A fast-response arc-relief pressure relief device, installed inside a cabinet, includes three pressure relief covers located on the top of the cabinet and corresponding to three compartments: the busbar compartment, the circuit breaker compartment, and the cable compartment, respectively. It also includes:

[0008] The locking mechanism is located inside the cabinet and is connected to the pressure relief cover to keep the pressure relief cover closed. The locking mechanism is also connected to a driven mechanism.

[0009] A cylinder installed inside the cabinet has an elastic movable mechanism inside, and the elastic movable mechanism is connected to a first elastic telescopic rod. The movable part of the first elastic telescopic rod is connected to a protrusion that cooperates with the driven mechanism.

[0010] When the pressure inside the compartment increases, the elastic moving mechanism is triggered, which causes the first elastic telescopic rod to drive the protrusion to perform a deflection action. When the pressure increase rate is less than a preset threshold, the protrusion and the driven mechanism do not cooperate. When the pressure increase rate reaches the preset threshold, the protrusion and the driven mechanism cooperate, which causes the driven mechanism to drive the locking mechanism to release the locking state of the pressure relief cover.

[0011] The rapid-response arc relief device described above: the elastic moving mechanism includes a piston disc that is sealed and slidably disposed inside the cylinder and two sets of second elastic telescopic rods installed in the cylinder. The moving part of the second elastic telescopic rod is connected to the piston disc, and the piston disc is connected to the first elastic telescopic rod through a follower structure.

[0012] The rapid-response arc-relieving device described above: the follow-up structure includes a rack plate connected to the piston disc via two connecting rods and a gear rotatably mounted on the outer wall of the cylinder and meshing with the rack plate, and the guide of the first elastic telescopic rod is connected to the rotating shaft of the gear.

[0013] As described above, the fast-response arc relief device includes a driven mechanism comprising a guide plate connected to the cylinder and arranged in an "L" shape. The guide plate has two perpendicular grooves, in which a first movable plate and a second movable plate are slidably fitted respectively. The first movable plate has a transmission structure that cooperates with the protruding post, and the second movable plate is connected to the locking mechanism.

[0014] As described above, the rapid-response arc relief device includes: a third elastic telescopic rod connected to the second movable plate and provided on the guide plate; a push-pull rod is provided between the first movable plate and the second movable plate, with both ends of the push-pull rod hinged to the first movable plate and the second movable plate, respectively.

[0015] The fast-response arc relief device described above: the transmission structure includes a driven block disposed on the first movable plate, the driven block being arranged in a U-shape and having a tapered portion formed on the upper end of one side facing the cylinder.

[0016] The fast-response arc relief device described above: the locking mechanism includes a follower arm connected to the second movable plate and a plurality of pins provided on the follower arm, and the pressure relief cover is provided with a plurality of latches that cooperate with the pins;

[0017] The inner wall of the latch and the end of the pin away from the follower arm are respectively provided with a first inclined surface and a second inclined surface.

[0018] As described above, the rapid-response arc relief device includes a reset cylinder on the guide plate. The movable end of the reset cylinder is connected to a reset lever. The reset cylinder can drive the reset lever to move the follower arm and the second movable plate away from the cylinder.

[0019] A method for handling arcing in a smart grid employs a fast-response arcing pressure relief device. When the pressure inside the compartment increases due to a non-arcing phenomenon, the convex post and the driven mechanism do not engage, and the locking mechanism remains locked to the pressure relief cover, keeping the pressure relief cover closed. When an arcing phenomenon occurs, the radius of the trajectory of the convex post increases, and it engages with the driven mechanism, causing the driven mechanism to drive the locking mechanism to release the locking state of the pressure relief cover. The pressure relief cover is then forced open by the high pressure and switched to the open state.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] This invention, by setting a cylinder in the compartment and sealing and sliding a piston disc inside the cylinder, utilizes the characteristic of a sudden pressure rise in the compartment when an arc occurs. The movement of the piston disc in the cylinder causes the first elastic telescopic rod to swing rapidly, thereby increasing the radius of the trajectory of the protruding column under the action of centrifugal force. In this case, the protruding column triggers the driven mechanism, causing the locking mechanism to release the locking state of the pressure relief cover, which can then be forced open. This achieves an automatic pressure relief function based on the rate of pressure change. Compared with existing purely passive destructive pressure relief methods (nylon bolt shearing, weak edge tearing), this effectively reduces subsequent maintenance costs and maintenance intensity.

[0022] Furthermore, when the pressure inside the compartment increases due to non-arc phenomena, the driven block is not on the movement trajectory of the convex column. When an arc phenomenon occurs, the driven block is on the movement trajectory of the convex column. Thus, the driven mechanism can be triggered only when an arc phenomenon occurs, causing the locking state of the pressure relief cover to be released. This can effectively avoid the misjudgment problem caused by relying solely on sensor detection, and provide effective protection for the stable operation of the smart grid.

[0023] In addition, during maintenance, staff only need to control the switch of the reset cylinder and use the reset lever to assist the pin in re-inserting into the latch, thereby restoring the pressure relief cover to the closed state and improving the convenience of maintenance. Attached Figure Description

[0024] Figure 1 A schematic diagram of one embodiment of a fast-response arc-relieving pressure relief device.

[0025] Figure 2 This is a structural schematic diagram from another angle of one embodiment of a fast-response arc-relieving pressure relief device.

[0026] Figure 3 A schematic diagram of the internal structure of the cabinet in one embodiment of a rapid-response arc relief device.

[0027] Figure 4 A schematic diagram showing the closed state of three pressure relief covers in one embodiment of a rapid-response arc relief device.

[0028] Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle.

[0029] Figure 6 A schematic diagram showing the distribution of multiple latches on the pressure relief cover plate in one embodiment of a rapid-response arc venting device.

[0030] Figure 7 An exploded view of the structure of the elastic moving mechanism in one embodiment of a fast-response arc relief device.

[0031] Figure 8 A front view of the driven mechanism in one embodiment of a fast-response arc relief device.

[0032] Figure 9 An exploded view of the driven mechanism in one embodiment of a fast-response arc relief device.

[0033] Figure 10 This is a schematic diagram of the movement of the elastic movable mechanism in one embodiment of a fast-response arc relief device when an arcing phenomenon occurs.

[0034] In the diagram: 1. Cabinet; 2. Pressure relief cover; 3. Lock; 301. First inclined plane; 4. Cylinder; 5. Filter disc; 6. Gear; 7. First elastic telescopic rod; 8. Protruding column; 9. Piston disc; 10. Second elastic telescopic rod; 11. Connecting rod; 12. Rack plate; 13. Guide plate; 14. First movable plate; 15. Second movable plate; 16. Follower arm; 17. Pin; 1701. Second inclined plane; 18. Push-pull rod; 19. Driven block; 1901. Conical part; 20. Third elastic telescopic rod; 21. Reset cylinder; 2101. Reset lever. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0037] Please see Figures 1-10 In this embodiment, a fast-response arc-relief device is installed inside the cabinet 1, including three pressure relief covers 2 installed on the top of the cabinet 1 and corresponding to the busbar compartment, circuit breaker compartment, and cable compartment respectively, and further including:

[0038] A locking mechanism is installed inside the cabinet 1. The locking mechanism is connected to the pressure relief cover 2 to keep the pressure relief cover 2 closed. The locking mechanism is also connected to a driven mechanism.

[0039] The cylinder 4 installed inside the cabinet 1 has an elastic movable mechanism inside, and the elastic movable mechanism is connected to a first elastic telescopic rod 7. The movable part of the first elastic telescopic rod 7 is connected to a protrusion 8 that cooperates with the driven mechanism.

[0040] When the pressure inside the compartment increases, the elastic moving mechanism is triggered, which causes the first elastic telescopic rod 7 to drive the protruding post 8 to perform a deflection action. When the pressure increase rate is less than a preset threshold, the protruding post 8 does not cooperate with the driven mechanism. When the pressure increase rate reaches the preset threshold, the protruding post 8 cooperates with the driven mechanism, which can cause the driven mechanism to drive the locking mechanism to release the locking state of the pressure relief cover 2.

[0041] In this embodiment, it should be noted that in practical applications, since the three pressure relief covers 2 are installed on the top of the cabinet 1 and arranged side by side via hinges, in order to avoid mutual interference when the three pressure relief covers 2 are opened, and also to protect the pressure relief covers 2, the deflection angle of the pressure relief covers 2 needs to be limited. Preferably, the deflection angle of the pressure relief covers 2 is limited to no more than 90°. This application does not specifically limit the specific limiting means, and can select them according to actual needs.

[0042] Secondly, the aforementioned preset threshold is the rate at which the pressure inside the cabinet 1 increases when an arcing phenomenon occurs inside the cabinet 1 and pressure relief intervention is required. Specifically, under normal circumstances, the rate of pressure increase caused by non-arcing phenomena is relatively slow compared to arcing. At this time, the elastic moving mechanism causes the first elastic telescopic rod 7 to deflect slowly, and the moving part of the first elastic telescopic rod 7 will not be thrown out a sufficient length due to centrifugal force, so the protrusion 8 cannot cooperate with the driven mechanism.

[0043] When an arcing phenomenon occurs, the pressure inside cabinet 1 increases rapidly. First, the high-pressure environment fills the compartments (busbar compartment, circuit breaker compartment, or cable compartment) inside cabinet 1. During this process, the elastic moving mechanism moves rapidly, causing the first elastic telescopic rod 7 to deflect rapidly. Then, under the action of centrifugal force, the moving part of the first elastic telescopic rod 7 is thrown out a sufficient length, so that the protrusion 8 cooperates with the driven mechanism, causing the driven mechanism to be triggered. The driven mechanism drives the locking mechanism to release the locking state of the pressure relief cover 2. Then, the pressure continues to increase, forcing open the pressure relief cover 2 which has been released from its locking state.

[0044] As a further embodiment of the present invention, please refer again. Figure 5 and Figure 7 The elastic moving mechanism includes a piston disc 9 that is sealed and slidably disposed inside the cylinder 4 and two sets of second elastic telescopic rods 10 installed in the cylinder 4. The movable part of the second elastic telescopic rod 10 is connected to the piston disc 9, and the piston disc 9 is connected to the first elastic telescopic rod 7 through a follower structure.

[0045] As a further embodiment of the present invention, the follower structure includes a rack plate 12 connected to the piston disc 9 via two connecting rods 11, and a gear 6 rotatably mounted on the outer wall of the cylinder 4 and meshing with the rack plate 12, wherein the guide of the first elastic telescopic rod 7 is connected to the rotation shaft of the gear 6.

[0046] In this embodiment, specifically, when the pressure inside the cabinet 1 increases, it causes the piston disc 9 to slide upward in the cylinder 4. Correspondingly, the piston disc 9 drives the rack plate 12 to move upward through the two connecting rods 11. At this time, the gear 6 of the rack plate 12 rotates, and the first elastic telescopic rod 7 swings. When an arcing phenomenon occurs, the pressure inside the cabinet 1 rises sharply. When the pressure fills the cabinet 1, it causes the piston disc 9 to slide upward quickly in the cylinder 4, causing the first elastic telescopic rod 7 to swing rapidly. Thus, the centrifugal force is large at this time, which causes the moving part of the first elastic telescopic rod 7 to slide relative to the guide, that is, the moving part slides towards the outside of the guide. Subsequently, the radius of the trajectory of the protrusion 8 increases, and the protrusion 8 will cooperate with the driven mechanism. When the driven mechanism is triggered, it can drive the locking mechanism to release the locking state of the pressure relief cover 2.

[0047] To address this, the present invention installs a cylinder 4 within the compartment and a piston disc 9 is sealed and slidably installed inside the cylinder 4. Based on the characteristic of a sudden pressure rise in the compartment when an arc occurs, the movement of the piston disc 9 within the cylinder 4 causes the first elastic telescopic rod 7 to swing rapidly. This increases the radius of the trajectory of the protruding column 8 under centrifugal force. In this case, the protruding column 8 triggers the driven mechanism, causing the locking mechanism to release the locking state of the pressure relief cover 2. The pressure relief cover 2 can then be opened, realizing an automatic pressure relief function based on the rate of pressure change. This provides an effective guarantee for the stable operation of the smart grid. Compared with existing purely passive destructive pressure relief methods (nylon bolt shearing, weak edge tearing), it effectively reduces subsequent maintenance costs and maintenance workload.

[0048] It should be noted that a filter disc 5 is also provided at the top of the cylinder 4. The filter disc 5 is used to block foreign objects that may enter the cylinder 4, avoid increasing the load on the piston disc 9, and ensure the smoothness of the piston disc 9 sliding downward in the cylinder 4 when the pressure inside the cabinet 1 increases, thereby ensuring the sensitivity of the pressure relief function.

[0049] As a further embodiment of the present invention, please refer again. Figure 5 , Figure 8 as well as Figure 9The driven mechanism includes an L-shaped guide plate 13 connected to the cylinder 4. The guide plate 13 has two perpendicular grooves, in which a first movable plate 14 and a second movable plate 15 are slidably fitted respectively. The first movable plate 14 has a transmission structure that cooperates with the protruding post 8. The second movable plate 15 is connected to the locking mechanism. The second movable plate 15 is also connected to a third elastic telescopic rod 20 disposed on the guide plate 13. A push-pull rod 18 is provided between the first movable plate 14 and the second movable plate 15, with both ends of the push-pull rod 18 hinged to the first movable plate 14 and the second movable plate 15 respectively.

[0050] As a further embodiment of the present invention, the transmission structure includes a driven block 19 disposed on the first movable plate 14. The driven block 19 is arranged in a U-shape and has a tapered portion 1901 formed on the upper end of one side facing the cylinder 4.

[0051] Please see Figure 10 When the piston disc 9 slides upward within the cylinder 4 due to the increased pressure inside the cabinet 1, the rack plate 12 drives the gear 6 to rotate clockwise. If the inducing factor for the increased pressure is not arcing, it is insufficient to cause relative movement between the guide and movable parts of the first elastic telescopic rod 7, and the driven block 19 is not on the movement trajectory of the protrusion 8. However, when arcing occurs, the pressure inside the cabinet 1 rises sharply. Under the action of centrifugal force, the guide and movable parts of the first elastic telescopic rod 7 slide relative to each other, thereby increasing the radius of the movement trajectory of the protrusion 8, causing the driven block 19 to be located on the movement trajectory of the protrusion 8. Consequently, the protrusion 8 then enters the recess of the driven block 19 to attach... Figure 8 Taking the perspective as an example, the protruding post 8 causes the driven block 19 to drive the first movable plate 14 to slide downward on the guide plate 13. The first movable plate 14 then pulls the second movable plate 15 to slide to the right through the push-pull rod 18 (the internal spring of the third elastic telescopic rod 20 is compressed), so that the locking mechanism releases the locking state of the pressure relief cover 2, and then the pressure relief cover 2 can be smoothly opened to realize the pressure relief function when the arc occurs.

[0052] As a further embodiment of the present invention, please refer again. Figure 6 and Figure 8 The locking mechanism includes a follower arm 16 connected to the second movable plate 15 and a plurality of pins 17 provided on the follower arm 16. The pressure relief cover plate 2 is provided with a plurality of latches 3 that cooperate with the pins 17.

[0053] The inner wall of the latch 3 and the end of the pin 17 away from the follower arm 16 are respectively provided with a first inclined surface 301 and a second inclined surface 1701.

[0054] In this embodiment, with attachment Figure 4 Taking the state shown as an example, at this time, the pressure relief cover 2 is in the closed state, and the pin 17 is located in the latch 3, so that the pressure relief cover 2 is kept in the closed state. When an arcing phenomenon occurs, the first movable plate 14 pulls the second movable plate 15 through the push-pull rod 18 to move. The second movable plate 15 then drives the pin 17 to be pulled out from the latch 3 through the follower arm 16. As a result, the pressure relief cover 2 will be forced open by the high pressure and automatically switch to the open state.

[0055] As a further embodiment of the present invention, please refer again. Figure 9 The guide plate 13 is also provided with a reset cylinder 21. The movable end of the reset cylinder 21 is connected to a reset lever 2101. The reset cylinder 21 can drive the reset lever 2101 to move the follower arm 16 and the second movable plate 15 away from the cylinder 4.

[0056] In this embodiment, after the pressure relief is completed, the second elastic telescopic rod 10 drives the piston disc 9 to move downward, causing all components to reset. The pressure relief cover 2 swings downward, and at this time, the pin 17 cannot be matched with the latch 3. To address this, during maintenance, the operator can turn on the switch of the reset cylinder 21. The movable end of the reset cylinder 21 retracts, and the follower arm 16 moves away from the cylinder 4 through the reset lever 2101 (the spring inside the third elastic telescopic rod 20 is compressed). Then, the pressure relief cover 2 continues to swing downward at a small angle. Subsequently, the movable end of the reset cylinder 21 quickly extends, and the third elastic telescopic rod 20 drives the second movable plate 15 and the follower arm 16 to move the pin 17 toward the latch 3. The second inclined surface 1701 acts on the first inclined surface 301, so that the pressure relief cover 2 is tightly closed, improving the efficiency of maintenance.

[0057] A method for handling arcing in a smart grid employs a fast-response arcing pressure relief device. When the pressure inside the compartment increases due to a non-arc phenomenon, the convex post 8 does not cooperate with the driven mechanism, and the locking mechanism remains locked to the pressure relief cover 2, keeping the pressure relief cover 2 closed. When an arcing phenomenon occurs, the radius of the trajectory of the convex post 8 increases, and it cooperates with the driven mechanism, causing the driven mechanism to drive the locking mechanism to release the locking state of the pressure relief cover 2. The pressure relief cover 2 is then forced open by the high pressure and switched to the open state.

[0058] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0059] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fast-response arc relief device, installed inside a cabinet, including three pressure relief covers installed on the top of the cabinet and corresponding to three compartments: busbar compartment, circuit breaker compartment, and cable compartment, respectively. Its features are, Also includes: The locking mechanism is located inside the cabinet and is connected to the pressure relief cover to keep the pressure relief cover closed. The locking mechanism is also connected to a driven mechanism. A cylinder installed inside the cabinet has an elastic movable mechanism inside, and the elastic movable mechanism is connected to a first elastic telescopic rod. The movable part of the first elastic telescopic rod is connected to a protrusion that cooperates with the driven mechanism. When the pressure inside the compartment increases, the elastic moving mechanism is triggered, which causes the first elastic telescopic rod to drive the protrusion to perform a deflection action. When the pressure increase rate is less than a preset threshold, the protrusion and the driven mechanism do not cooperate. When the pressure increase rate reaches the preset threshold, the protrusion and the driven mechanism cooperate, which causes the driven mechanism to drive the locking mechanism to release the locking state of the pressure relief cover.

2. The rapid-response arc-relief device according to claim 1, characterized in that, The elastic moving mechanism includes a piston disc that is sealed and slidably disposed inside the cylinder and two sets of second elastic telescopic rods installed in the cylinder. The movable part of the second elastic telescopic rod is connected to the piston disc, and the piston disc is connected to the first elastic telescopic rod through a follower structure.

3. The rapid-response arc-relief device according to claim 2, characterized in that, The follower structure includes a rack plate connected to the piston disc via two connecting rods and a gear rotatably mounted on the outer wall of the cylinder and meshing with the rack plate. The guide of the first elastic telescopic rod is connected to the rotation shaft of the gear.

4. The rapid-response arc-relief device according to claim 1, characterized in that, The driven mechanism includes a guide plate connected to the cylinder and arranged in an "L" shape. The guide plate has two perpendicular sliding grooves, in which a first movable plate and a second movable plate are slidably fitted respectively. The first movable plate has a transmission structure that cooperates with the protrusion, and the second movable plate is connected to the locking mechanism.

5. The fast-response arc-relieving device according to claim 4, characterized in that, The second movable plate is also connected to a third elastic telescopic rod provided on the guide plate. A push-pull rod is provided between the first movable plate and the second movable plate, and the two ends of the push-pull rod are respectively hinged to the first movable plate and the second movable plate.

6. The fast-response arc-relief device according to claim 5, characterized in that, The transmission structure includes a driven block disposed on the first movable plate. The driven block is arranged in a U-shape and has a tapered portion formed on the upper end of one side facing the cylinder.

7. The fast-response arc-relieving device according to claim 4, characterized in that, The locking mechanism includes a follower arm connected to the second movable plate and a plurality of pins provided on the follower arm. The pressure relief cover is provided with a plurality of latches that cooperate with the pins. The inner wall of the latch and the end of the pin away from the follower arm are respectively provided with a first inclined surface and a second inclined surface.

8. The fast-response arc-relieving device according to claim 7, characterized in that, The guide plate is also provided with a reset cylinder. The movable end of the reset cylinder is connected to a reset lever. The reset cylinder can drive the reset lever to move the follower arm and the second movable plate away from the cylinder.

9. A method for handling arcing in a smart grid, characterized in that, Using the rapid-response arc-relieving pressure relief device as described in claim 1, when the pressure in the compartment increases due to a non-arc phenomenon, the protruding post and the driven mechanism do not cooperate, the locking mechanism remains locked to the pressure relief cover, and the pressure relief cover remains closed. When an arc phenomenon occurs, the radius of the trajectory of the protruding post increases, and it cooperates with the driven mechanism, causing the driven mechanism to drive the locking mechanism to release the locking state of the pressure relief cover. The pressure relief cover is then forced open by the high pressure and switched to the open state.

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