Arc extinguishing and fire suppression device for ship power system

Abstract

The invention discloses an arc extinguishing and fire suppression device for a ship power system, and relates to the technical field of power equipment, and the device comprises a moving assembly which is disposed in the power system; the fixed assembly is arranged corresponding to the movable assembly; the connecting joint is fixed at one end, opposite to the moving assembly, of the fixed assembly; the moving contact is fixed in the center of the interior of the moving assembly; the static contact is fixed in the fixing assembly and corresponds to the moving contact; and the arc extinguishing device is fixed in the connecting joint. The stop block is arranged, the distance between the contacts is rapidly increased, so that the electric arc is cooled and lengthened, the extinguishing of the electric arc is promoted, and the electric arc can be rapidly cooled, thermal dissociation is inhibited and the arcing time is shortened in cooperation with the arc extinguishing device.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and more specifically, to a device for arc extinguishing and fire suppression in a ship's power system. Background Technology

[0002] As ship electrical systems develop towards higher voltage and larger capacity, the risk of electrical fires has increased significantly. The complex environment of ships, with its confined spaces and limited ventilation, makes them highly susceptible to cascading fires, leading to casualties and significant economic losses. Traditional ship electrical system switching devices generate high-temperature arcs upon circuit disconnection, potentially damaging equipment and causing fires. Furthermore, the arc extinguishing process can result in reignition and hot metal splashes, increasing the risk of fire spread. Existing arc extinguishing devices often suffer from low efficiency and insufficient fire suppression capabilities, failing to meet the safety requirements of ship electrical systems in complex environments such as high humidity and high salt spray. Therefore, there is an urgent need for a device integrating arc extinguishing and fire suppression functions to improve the safety of ship electrical systems. Thus, it is necessary to provide a device for arc extinguishing and fire suppression in ship electrical systems to address the problems mentioned in the background. Summary of the Invention

[0003] To achieve the above objectives, the present invention provides the following technical solution: a device for arc extinguishing and fire suppression in a ship's electrical system, comprising:

[0004] Mobile components, installed in the power system;

[0005] Fixed components are configured in accordance with the corresponding mobile components;

[0006] The connecting connector is fixed at the end opposite to the fixed component and the movable component;

[0007] The moving contact is fixed at the internal center of the moving component;

[0008] The stationary contact is fixed inside the stationary component and corresponds to the moving contact.

[0009] The arc-extinguishing device is fixed inside the connecting joint.

[0010] Furthermore, preferably, the moving component includes:

[0011] Move the frame to control the overall movement of the moving components;

[0012] The limiting joint is slidably mounted on the inner wall of the movable frame, corresponding to the connecting joint;

[0013] A first compression spring is disposed within the movable frame and is fixedly connected to the end of the limiting joint away from the connecting joint. The first compression spring is sleeved on the moving contact, which is fixedly connected to the center of the movable frame and slidably connected to the limiting joint.

[0014] Furthermore, preferably, the fixing component includes:

[0015] The fixed frame is fixedly connected to the connecting joint;

[0016] The blocking mechanism is fixed at the center of the fixed frame and located at the center of the stationary contact;

[0017] The cooling ring is located outside the fixed frame, on the outer side of the connection between the stationary and moving contacts.

[0018] Furthermore, preferably, the blocking mechanism includes:

[0019] A fixed cylinder is fixed at the center of the stationary contact.

[0020] The push surface is slidably disposed inside the fixed cylinder, and a push shaft is provided at the center of the push surface;

[0021] The second compression spring is disposed between the fixed cylinder and the pushing surface;

[0022] The limiting ring is fixed inside the fixed cylinder and is located on the side of the pushing surface away from the second compression spring;

[0023] The blocking block is slidably connected to the fixed cylinder and fixedly connected to the push shaft.

[0024] Furthermore, preferably, the arc-extinguishing device includes:

[0025] The retaining ring is fixed inside the connecting joint, and its outer wall is slidably connected to the limiting joint.

[0026] Multiple arc-extinguishing components are arranged in a ring and fixed on the inner wall of the fixed ring, and the arc-extinguishing components are slidably connected to the limiting joint.

[0027] Multiple fire suppression components are arranged in a ring, spaced apart from the arc extinguishing components.

[0028] Furthermore, preferably, the arc-extinguishing component includes:

[0029] The arc-extinguishing medium assembly is fixed on the inner wall of the fixing ring on the outside and slidably connected to the limiting joint on the inside.

[0030] The permanent magnet array is fixed at both ends of the arc-extinguishing medium group and is fixedly connected to the fixing ring.

[0031] Furthermore, as a preferred embodiment, the arc-extinguishing medium assembly is provided with a plurality of spaced ceramic grids inside.

[0032] Furthermore, preferably, the fire suppression component includes:

[0033] The connecting arc plate is I-shaped and is fixedly connected to two adjacent arc-extinguishing components, with its inner arc surface slidably connected to the limiting joint.

[0034] The circulation box is located between the arc-extinguishing components and corresponds to the arc-extinguishing medium group.

[0035] The filter plate is fixed in the middle of the circulation box;

[0036] Two drive mechanisms are symmetrically distributed and fixed at both ends of the circulation box, located between the permanent magnet array;

[0037] The output component is located on one side of the connecting arc plate and is fixedly connected to the arc extinguishing medium group;

[0038] The recycling component is symmetrically arranged on the other side of the connecting arc plate with the output component, and the recycling component has the same structure as the output component.

[0039] Furthermore, preferably, the output component includes:

[0040] Rotate the half-cylinder, the central shaft is connected to the drive mechanism, one side is in contact with the arc extinguishing medium group, and the other side is in contact with the connecting arc plate;

[0041] A fixing plate is installed at the cross-section of the rotating half-cylinder, and one side is fixedly connected to the arc-extinguishing medium assembly;

[0042] The movable plate is located on the cross-section of the rotating half-cylinder, with one side corresponding to the side of the fixed plate away from the arc-extinguishing medium group, and the other side fixedly connected to the rotating half-cylinder.

[0043] Compared with the prior art, the beneficial effects of the present invention are:

[0044] In this invention, the moving component enables the moving contact to cooperate with the stationary contact, thereby achieving circuit connection or disconnection; the blocking mechanism intervenes after the contacts separate, rapidly increasing the distance between them, thus cooling and lengthening the arc and promoting its extinguishing; the cooling ring effectively prevents overheating of the contacts, avoiding material damage and improving the stability and lifespan of the equipment; the arc-extinguishing component, under the radial magnetic field formed by the permanent magnet, causes the arc to rotate at high speed under the Lorentz force, increasing the contact area with the grid and accelerating arc extinguishing; and the fire suppression component circulates and delivers suppressing gas within the arc-extinguishing device, rapidly cooling the arc, suppressing thermal ionization, and shortening the arcing time. Attached Figure Description

[0045] Figure 1A schematic diagram of the overall structure of a device for arc extinguishing and fire suppression in a ship's electrical system;

[0046] Figure 2 This is a schematic diagram of the moving and fixed components.

[0047] Figure 3 This is a schematic diagram of the blocking mechanism.

[0048] Figure 4 This is a schematic diagram of the arc-extinguishing device.

[0049] Figure 5 A schematic diagram of the arc extinguishing assembly and the fire suppression assembly;

[0050] Figure 6 This is a schematic diagram of the output and recycling components.

[0051] In the diagram: 1. Moving component; 2. Fixed component; 3. Connecting joint; 4. Moving contact; 5. Stationary contact; 6. Arc extinguishing device; 11. Moving frame; 12. Limiting joint; 13. First compression spring; 21. Fixed frame; 22. Blocking mechanism; 23. Cooling ring; 61. Fixed ring; 62. Arc extinguishing component; 63. Fire suppression component; 221. Fixed cylinder; 222. Pushing surface; 223. Second compression spring; 224. Limiting ring; 225. Blocking block; 621. Arc extinguishing medium group; 622. Permanent magnet array; 631. Connecting arc plate; 632. Circulation box; 633. Filter plate; 634. Drive mechanism; 635. Output component; 636. Recycling component; 6211. Ceramic grid; 6351. Rotating half-cylinder; 6352. Fixed plate; 6353. Moving plate. Detailed Implementation

[0052] Please see Figures 1-6 In this embodiment of the invention, a device for arc extinguishing and fire suppression in a ship's electrical system includes:

[0053] Mobile component 1 is installed in the power system;

[0054] Fixed component 2 is configured to correspond to movable component 1;

[0055] Connector 3 is fixed at the end opposite to the fixed component 2 and the movable component 1;

[0056] The moving contact 4 is fixed at the center inside the moving component 1;

[0057] The stationary contact 5 is fixed inside the fixed component 2 and corresponds to the moving contact 4.

[0058] Arc extinguishing device 6 is fixed inside the connecting joint 3.

[0059] In this embodiment, the moving component 1 includes:

[0060] Move frame 11 to control the overall movement of moving component 1;

[0061] The limiting connector 12 is slidably disposed on the inner wall of the movable frame 11, corresponding to the connecting connector 3;

[0062] The first compression spring 13 is disposed inside the movable frame 11 and is fixedly connected to the end of the limiting joint 12 away from the connecting joint 3. The first compression spring 13 is sleeved on the moving contact 4, which is fixedly connected to the center of the movable frame 11 and slidably connected to the limiting joint 12.

[0063] In other words, driven by the moving frame 11, the limiting connector 12 moves towards the connecting connector 3. After the limiting connector 12 and the connecting connector 3 are fully engaged, the moving frame 11 slides on the outer wall of the limiting connector 12 under the continuous movement of the moving frame 11, compressing the first compression spring 13 and driving the moving contact 4 to move towards the fixed component 2. The moving contact 4 connects with the stationary contact 5, making the circuit conductive. Conversely, driven by the moving frame 11 and the reset action of the first compression spring 13, the moving frame 11 slides on the limiting connector 12, while driving the moving contact 4 to disengage from the stationary contact 5. As the moving frame 11 continues to move, it drives the limiting connector 12 to disengage from the connecting connector 3, making the circuit disconnected. Thus, the circuit is made and disconnected by the movement of the moving component 1.

[0064] In this embodiment, the fixing component 2 includes:

[0065] The fixed frame 21 is fixedly connected to the connecting joint 3;

[0066] The blocking mechanism 22 is fixed at the center of the fixed frame 21 and located at the center of the stationary contact 5;

[0067] The cooling ring 23 is set outside the fixed frame 21, located on the outside of the connection between the stationary contact 5 and the moving contact 4.

[0068] In other words, when the moving component 1 moves the moving contact 4 to the position of the stationary contact 5, the moving contact 4 first contacts the blocking mechanism 22, compressing the blocking mechanism 22 until the moving contact 4 connects with the stationary contact 5, making the circuit conductive. Under the action of the outer cooling ring 23, the connection is continuously cooled, effectively preventing the contact from overheating, avoiding material damage, and improving the stability and lifespan of the equipment. When the moving component 1 moves the moving contact 4 to reset and disconnects the circuit, the blocking mechanism 22 intervenes after the contacts separate, quickly increasing the distance between the contacts, thereby cooling and lengthening the arc and promoting the extinction of the arc.

[0069] In this embodiment, the blocking mechanism 22 includes:

[0070] The fixed cylinder 221 is fixed at the center of the stationary contact 5;

[0071] The push surface 222 is slidably disposed inside the fixed cylinder 221, and a push shaft is provided at the center of the push surface 222;

[0072] The second compression spring 223 is disposed between the fixed cylinder 221 and the pushing surface 222;

[0073] The limiting ring 224 is fixed inside the fixed cylinder 221 and is located on the side of the pushing surface 222 away from the second compression spring 223;

[0074] The blocking block 225 is slidably connected to the fixed cylinder 221 and fixedly connected to the push shaft.

[0075] In other words, when the moving component 1 moves the moving contact 4 to the position of the stationary contact 5, the moving contact 4 first contacts the blocking block 225, pushing the blocking block 225 to move within the fixed cylinder 221. The pushing shaft drives the pushing surface 222 to compress the second compression spring 223 until the moving contact 4 connects with the stationary contact 5, thus making the circuit conductive. When the moving component 1 moves the moving contact 4 to reset and disconnects the circuit, the second compression spring 223 resets as the moving contact 4 is removed. The pushing surface 222 drives the blocking block 225 to move rapidly, and the limiting ring 224 restricts the position of the blocking block 225. With the intervention of the blocking block 225, the distance between the contacts increases rapidly, thereby cooling and lengthening the arc and promoting the extinguishing of the arc.

[0076] In this embodiment, the arc-extinguishing device 6 includes:

[0077] The retaining ring 61 is fixed inside the connecting joint 3, and its outer wall is slidably connected to the limiting joint 12.

[0078] Multiple arc-extinguishing components 62 are arranged in a ring and fixed on the inner wall of the fixing ring 61, and the arc-extinguishing components 62 are slidably connected to the limiting joint 12.

[0079] Fire suppression components 63 are arranged in a ring, with multiple components spaced apart from arc extinguishing components 62.

[0080] In other words, when the moving component 1 moves the moving contact 4 toward the stationary contact 5, the limiting joint 12 connects with the connecting joint 3. At this time, the arc extinguishing device 6 is located inside the limiting joint 12, which separates the arc extinguishing device 6 and the moving contact 4. When the moving component 1 moves the moving contact 4 away from the stationary contact 5, the moving contact 4 quickly returns to the limiting joint 12, and the limiting joint 12 disengages from the connecting joint 3, exposing the moving space of the moving contact 4 to the arc extinguishing components 62. The arc is guided to move toward the arc extinguishing components 62 by the magnetic field, increasing the contact area between the arc and the arc extinguishing components 62 to achieve rapid arc extinguishing. In order to prevent problems such as arc reignition and high-temperature splashing, the fire suppression component 63 circulates and injects suppression gas into the moving space of the moving contact 4 to quickly cool the arc, suppress thermal ionization, shorten the arcing time, and effectively prevent fire.

[0081] In this embodiment, the arc-extinguishing component 62 includes:

[0082] The arc-extinguishing medium assembly 621 is fixed on the inner wall of the fixing ring 61 on the outside and slidably connected to the limiting joint 12 on the inside.

[0083] The permanent magnet array 622 is fixed at both ends of the arc extinguishing medium group 621 and is fixedly connected to the fixing ring 61.

[0084] In this embodiment, the arc-extinguishing medium group 621 is provided with a plurality of spaced ceramic grid plates 6211 inside.

[0085] In other words, permanent magnet arrays 622 are arranged at both ends of the ceramic grid plate 6211. The magnetic field force elongates the electric arc and drives it to the region of the ceramic grid plate 6211. The permanent magnet array 622 forms a radial magnetic field, causing the electric arc to rotate at high speed under the action of the Lorentz force. The electric arc rotates under the action of the magnetic field and enters the gap of the ceramic grid plate 6211, where it is divided into multiple short arcs, increasing the contact area with the grid plate and achieving rapid arc extinguishing.

[0086] In this embodiment, the fire suppression component 63 includes:

[0087] The connecting arc plate 631 is I-shaped and is fixedly connected to two adjacent arc extinguishing components 62, and its inner arc surface is slidably connected to the limiting joint 12.

[0088] The circulation box 632 is disposed between the arc extinguishing components 62 and corresponds to the arc extinguishing medium group 621;

[0089] The filter plate 633 is fixed in the middle of the circulation box 632;

[0090] Two drive mechanisms 634 are symmetrically distributed and fixed at both ends of the circulation box 632, located between the permanent magnet array 622;

[0091] The output component 635 is located on one side of the connecting arc plate 631 and is fixedly connected to the arc extinguishing medium group 621;

[0092] The recycling component 636 is symmetrically arranged on the other side of the connecting arc plate 631 with the output component 635, and the recycling component 636 and the output component 635 have the same structure.

[0093] In other words, when the internal temperature of the arc extinguishing device 6 is detected to be too high, posing a risk of arc reignition or high-temperature splashing, the drive mechanism 634 drives the rotating output component 635 and the recovery component 636 to rotate respectively. Then, the suppressing gas inside the circulation box 632 is directly injected into the arc area between the moving contact 4 and the stationary contact 5 through the output component 635. The injected suppressing gas quickly covers the arc surface, reduces the arc temperature, and reduces thermal ionization. After the arc is extinguished, the residual gas is drawn back into the circulation box 632 through the recovery component 636, purified by the filter plate 633, and reused. This effectively prevents arc reignition and spread, improves arc extinguishing efficiency, and significantly shortens the arc burning time and reduces the risk of fire through rapid cooling and suppression of thermal ionization.

[0094] In this embodiment, the output component 635 includes:

[0095] Rotate the half-cylinder 6351, the central shaft is connected to the drive mechanism 634, one side is in contact with the arc extinguishing medium group 621, and the other side is in contact with the connecting arc plate 631;

[0096] The fixing plate 6352 is set at the cross-section of the rotating half-cylinder 6351, and is fixedly connected to the arc extinguishing medium group 621 on one side.

[0097] The movable plate 6353 is located on the cross-section of the rotating half-cylinder 6351. One side of it corresponds to the side of the fixed plate 6352 away from the arc-extinguishing medium group 621, and the other side is fixedly connected to the rotating half-cylinder 6351.

[0098] In other words, during the arc extinguishing stage, the drive mechanisms 634, symmetrically distributed at both ends of the circulation box 632, start working, driving the rotating half-cylinder 6351 in the output component 635 and the recovery component 636 to rotate around their central axis, and driving the moving plate 6353 to rotate, causing the fixed plate 6352 to separate from the moving plate 6353, opening the channel between the circulation box 632 and the arc area, and suppressing gas is ejected from the gap and directly injected into the arc area between the moving contact 4 and the stationary contact 5. The injected suppressing gas quickly covers the arc surface, reduces the arc temperature, and reduces thermal ionization. At the same time, the recovery component 636 draws back the suppressing gas from the arc area, purifies it through the filter plate 633, and then injects it back into the arc area through the output component 635 for circulation. After the arc is extinguished, the residual gas is drawn back into the circulation box 632 through the recovery component 636, passes through the filter plate 633, and is used as a backup.

[0099] In practice, the moving component 1 moves first, and the moving frame 11 drives the limiting joint 12 to move towards the connecting joint 3. After the limiting joint 12 and the connecting joint 3 are fully engaged, the moving frame 11 continues to slide on the outer wall of the limiting joint 12, compressing the first compression spring 13 and driving the moving contact 4 to move towards the fixed component 2. The moving contact 4 first contacts the blocking block 225 of the blocking mechanism 22, pushing the blocking block 225 to move within the fixed cylinder 221, compressing the second compression spring 223, until the moving contact 4 and the stationary contact 5 are tightly connected. When the circuit is connected, the cooling ring 23 continuously cools the connection between the moving contact 4 and the stationary contact 5, effectively preventing overheating of the contact, avoiding material damage, and improving the stability and lifespan of the equipment. When the circuit needs to be disconnected, the moving component 1 moves and resets, the moving frame 11 slides on the limit joint 12, and at the same time drives the moving contact 4 to disengage from the stationary contact 5. As the moving contact 4 is removed, the second compression spring 223 resets, and drives the blocking block 225 to move quickly through the pushing surface 222. The limit ring 224 controls the position of the blocking block 225. By restricting the movement of the arc, the intervention of the blocking block 225 rapidly increases the distance between the moving contact 4 and the stationary contact 5, thereby cooling and lengthening the arc and promoting its extinction. Simultaneously with the moving contact 4 disengaging from the stationary contact 5, the limiting connector 12 disengages from the connecting connector 3, exposing the moving contact 4's movement space to the arc-extinguishing components 62. The permanent magnet array 622 in the arc-extinguishing components 62 forms a radial magnetic field, guiding the arc towards the ceramic grid plate 6211. Under the influence of the magnetic field, the arc is divided into multiple short arc segments, increasing the contact area with the ceramic grid plate 6211 and achieving rapid arc extinguishing. To prevent arc reignition and high-temperature splashing, the fire suppression component 63 starts working. The drive mechanism 634 drives the rotating half-cylinder 6351 to rotate, opening the channel between the circulation box 632 and the arc area. The suppression gas is injected from the output component 635 into the arc area between the moving contact 4 and the stationary contact 5, quickly covering the arc surface, reducing the arc temperature and reducing thermal ionization. After the arc is extinguished, the residual gas is drawn back into the circulation box 632 through the recovery component 636, purified by the filter plate 633, and reused.

[0100] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for arc extinguishing and fire suppression in a ship's electrical system, characterized in that: include: Mobile component (1), installed in the power system; The fixed component (2) is set to correspond to the moving component (1); Connector (3) is fixed at the end opposite to the fixed component (2) and the movable component (1); The moving contact (4) is fixed at the center inside the moving component (1); The stationary contact (5) is fixed inside the fixed component (2) and corresponds to the moving contact (4); The arc extinguishing device (6) is fixed inside the connecting joint (3).

2. The device for arc extinguishing and fire suppression in a ship's electrical system according to claim 1, characterized in that: The mobile component (1) includes: Move the frame (11) to control the overall movement of the moving component (1); The limiting joint (12) is slidably set on the inner wall of the movable frame (11) and corresponds to the connecting joint (3); The first compression spring (13) is set inside the movable frame (11) and is fixedly connected to the end of the limiting joint (12) away from the connecting joint (3). The first compression spring (13) is sleeved on the moving contact (4). The moving contact (4) is fixedly connected to the center of the movable frame (11) and slidably connected to the limiting joint (12).

3. The device for arc extinguishing and fire suppression in a ship's electrical system according to claim 1, characterized in that: The fixing component (2) includes: The fixed frame (21) is fixedly connected to the connecting joint (3); The blocking mechanism (22) is fixed at the center of the fixed frame (21) and located at the center of the stationary contact (5); The cooling ring (23) is set outside the fixed frame (21) and located on the outside of the connection between the stationary contact (5) and the moving contact (4).

4. The device for arc extinguishing and fire suppression in a ship's electrical system according to claim 3, characterized in that: The blocking mechanism (22) includes: The fixed cylinder (221) is fixed at the center of the stationary contact (5); The push surface (222) is slidably disposed inside the fixed cylinder (221), and a push shaft is provided at the center of the push surface (222); The second compression spring (223) is disposed between the fixed cylinder (221) and the pushing surface (222); The limiting ring (224) is fixed inside the fixed cylinder (221) and located on the side of the pushing surface (222) away from the second compression spring (223); The blocking block (225) is slidably connected to the fixed cylinder (221) and fixedly connected to the push shaft.

5. The device for arc extinguishing and fire suppression in a ship's electrical system according to claim 2, characterized in that: The arc-extinguishing device (6) includes: The fixing ring (61) is fixed inside the connecting joint (3), and its outer wall is slidably connected to the limiting joint (12); Arc extinguishing components (62) are arranged in a ring and fixed on the inner wall of the fixing ring (61), and the arc extinguishing components (62) are slidably connected to the limiting joint (12); Fire suppression components (63) are arranged in a ring, with multiple components spaced apart from arc extinguishing components (62).

6. The device for arc extinguishing and fire suppression in a ship's electrical system according to claim 5, characterized in that: The arc-extinguishing component (62) includes: The arc-extinguishing medium assembly (621) is fixed on the inner wall of the fixing ring (61) on the outside and slidably connected to the limiting joint (12) on the inside. The permanent magnet array (622) is fixed at both ends of the arc extinguishing medium group (621) and fixedly connected to the fixing ring (61).

7. The device for arc extinguishing and fire suppression in a ship's electrical system according to claim 6, characterized in that: The arc-extinguishing medium assembly (621) has multiple spaced ceramic grids (6211) inside.

8. The device for arc extinguishing and fire suppression in a ship's electrical system according to claim 6, characterized in that: The fire suppression component (63) includes: The connecting arc plate (631) is I-shaped and is fixedly connected to two adjacent arc extinguishing components (62), and the inner arc surface is slidably connected to the limiting joint (12); A circulation box (632) is disposed between the arc extinguishing components (62) and corresponds to the arc extinguishing medium group (621); The filter plate (633) is fixed in the middle of the circulation box (632); Two drive mechanisms (634) are symmetrically distributed and fixed at both ends of the circulation box (632), located between the permanent magnet array (622); The output component (635) is located on one side of the connecting arc plate (631) and is fixedly connected to the arc extinguishing medium group (621); The recycling component (636) is symmetrically arranged on the other side of the connecting arc plate (631) with the output component (635), and the recycling component (636) and the output component (635) have the same structure.

9. The device for arc extinguishing and fire suppression in a ship's electrical system according to claim 8, characterized in that: The output component (635) includes: Rotate the half-cylinder (6351), the central shaft is connected to the drive mechanism (634), one side is in contact with the arc extinguishing medium group (621), and the other side is in contact with the connecting arc plate (631); The fixing plate (6352) is set at the cross-section of the rotating half-cylinder (6351), and one side is fixedly connected to the arc extinguishing medium group (621); The movable plate (6353) is located on the cross-section of the rotating half-cylinder (6351), with one side corresponding to the side of the fixed plate (6352) away from the arc-extinguishing medium group (621), and the other side being fixedly connected to the rotating half-cylinder (6351).

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