Gas-driven switch and opening and closing method of gas-driven switch

Abstract

The invention provides a gas-driven switch and a gas-driven switch opening and closing method. The gas-driven switch comprises a shell; the movable assembly is movably arranged in the shell; the air chamber is in driving connection with the movable assembly and is fixedly connected to the interior of the shell, and an air inlet hole is connected to the air chamber; the balance assembly is movably connected with the movable assembly and provides downward force for the movable assembly, and the balance assembly is fixedly connected to the interior of the shell; the static contact is fixedly connected with the shell and located at one end of the movable assembly; the expandable side of the air chamber abuts against the movable assembly, when a fault occurs, air pressure is conducted to the air chamber through the air inlet hole, and external force caused by the air pressure enables the air chamber to expand and move to push the movable assembly to damage balance of the balance assembly, so that the movable assembly moves; and finally, the switch is far away from the static contact or is in contact with the static contact, so that the switch completes switching-on or switching-off actions.

Description

Technical Field

[0001] This invention relates to the field of DC power transmission technology, specifically to a gas-driven switch and a method for opening and closing the gas-driven switch. Background Technology

[0002] In the field of traditional DC transmission technology, switches are divided into externally controlled and self-driven types: electromagnetic force driven switches and explosion driven switches are externally controlled types, both requiring external power supply and control programs; fuse blowing is self-driven, but it can only perform the opening function and cannot perform the closing function.

[0003] This invention employs a self-driven gas-driven switch scheme, which can perform both opening and closing functions. Summary of the Invention

[0004] To address the problem that existing self-driven control switches cannot perform both opening and closing functions, this invention proposes a gas-driven switch, comprising: case; Active components, which are movably disposed within the housing; An air chamber is driven and fixedly connected to the movable component inside the housing, and an air inlet is connected to the air chamber. A balancing component, movably connected to the movable component, provides a downward force to the movable component; the balancing component is fixedly connected inside the housing. The stationary contact is fixedly connected to the housing and located at one end of the movable component.

[0005] Preferably, two air chambers are symmetrically arranged, with each air chamber respectively disposed on both sides of the movable component. Each air chamber includes: The chamber is a hollow cavity structure with one end open. The chamber is fixedly connected to the shell. One end of the air inlet is connected to the chamber and the other end is connected to high-pressure gas. A pneumatic ejector block is connected to one end of the chamber opening, and the pneumatic ejector block abuts against the movable component; A sealing ring is located between the chamber and the pneumatic ejector block.

[0006] Preferably, two balancing components are symmetrically arranged, with each balancing component disposed on one side of the movable component. Each balancing component includes: A permanent magnet is fixedly connected to the housing, with one end of it connected to the movable component; A spring is arranged side by side with the permanent magnet and fixed to the housing, with one end of the spring connected to the movable component.

[0007] Preferably, the permanent magnet exerts a downward attractive force of 8F on the balancing assembly, and the spring exerts an upward elastic force of 7F on the balancing assembly; the initial state of the balancing assembly is always downward 1F.

[0008] Preferably, the movable component includes: a moving contact and a moving iron that is interference-fitted onto the moving contact; The moving contact has an I-shaped structure, one end of the air chamber is driven to be connected to one end of the I-shaped structure, the stationary contact is located at one end of the moving contact, and the other end of the moving contact is provided with a limiting block; The moving iron is located in the middle of the I-shaped structure, and the balancing component is movably connected to the side of the moving iron away from the air chamber.

[0009] Preferably, the housing includes: an insulating outer shell and an upper end plate and a lower end plate respectively connected to both ends of the insulating outer shell, wherein the upper end plate and the lower end plate are connected in parallel or in series in the circuit; The air inlet is provided through the insulating outer shell.

[0010] Furthermore, the present invention also provides a method for closing a gas-driven switch, based on the gas-driven switch described above, comprising: In the initial state of opening, the stationary contact is located at the upper end of the housing, and the moving component is located at the lower end of the housing; When a fault occurs, the expanding high-pressure gas enters the air chamber through the air inlet, driving the moving component to move upward and contact the stationary contact, thus completing the closing action.

[0011] Preferably, the expanding high-pressure gas enters the gas chamber through the air inlet, driving the movable component to move upward and contact the stationary contact, completing the closing action, including: The high-pressure gas enters the air chamber through the air inlet, driving the pneumatic ejector block to move upward. Its pressure is greater than the downward force of the resultant force of the moving contact in a stable state. After the pneumatic ejector block drives the moving contact to move upward by 1mm, the attraction of the permanent magnet to the moving iron drops rapidly. At this time, the spring force is greater than the attraction force. The higher the moving contact moves, the faster the attraction force decays, while the spring force decays linearly and slowly. The reasonable upward force and attraction force continue to increase and become larger and larger. The moving contact makes contact with the stationary contact to complete the closing action.

[0012] Furthermore, the present invention also provides a method for opening a gas-driven switch, based on the gas-driven switch described above, comprising: In the initial closed state, the stationary contact is located at the lower end of the housing, and the movable component is located at the lower end of the housing and connected to the stationary contact; When a fault occurs, the expanding high-pressure gas enters the air chamber through the air inlet, driving the movable component to move upward and contact the limit block, thus completing the tripping action.

[0013] Preferably, the expanding high-pressure gas enters the air chamber through the air inlet, driving the movable component to move upward and contact the limit block, completing the tripping action, including: The high-pressure gas enters the air chamber through the air inlet, driving the pneumatic ejector block to move upward. Its pressure is greater than the downward force of the resultant force of the moving contact in a stable state, causing the moving contact and the stationary contact to come into contact. After the pneumatic ejector block drives the moving contact to move upward by 1mm, the attraction force of the permanent magnet to the moving iron drops rapidly. At this time, the spring force is greater than the attraction force. The higher the moving contact moves, the faster the attraction force decays, while the spring force decays linearly and slowly. The spring force and attraction force continue to rise reasonably and become larger and larger. The moving contact contacts the limit block to complete the opening action, and a gap is generated between the moving contact and the stationary contact.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention provides a gas-driven switch, comprising: a housing; a movable component movably disposed within the housing; a gas chamber driven and fixedly connected to the movable component and inside the housing, the gas chamber having an air inlet; a balancing component movably connected to the movable component to provide a downward force to the movable component, the balancing component being fixedly connected inside the housing; and a stationary contact fixedly connected to the housing and located at one end of the movable component. The contact or separation between the movable component and the stationary contact is used to open or close the switch. The expandable side of the gas chamber abuts against the movable component. When a fault occurs, gas pressure is conducted to the gas chamber through the air inlet. The external force caused by the gas pressure causes the gas chamber to expand and move, pushing the movable component to disrupt the balance of the balancing component, thereby causing the movable component to move away from or contact the stationary contact, thus enabling the switch to complete the closing or opening action. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the gas-driven switch of the present invention; Figure 2 This is a schematic diagram of the pneumatic switch closing method of the present invention, which involves opening the switch in its initial state and closing it in its action. Figure 3 This is a schematic diagram of the pneumatic switch principle for the initial state opening and the action closing of the present invention. Figure 4 This is a schematic diagram of the pneumatic switch tripping method of the present invention, which involves initial closing and subsequent tripping. Figure 5This is a schematic diagram of the pneumatic switch principle of the present invention, which is closed in the initial state and opened in action. Among them, 1-upper end plate, 2-air inlet, 3-lower end plate, 4-insulating shell, 5-stationary contact, 6-pneumatic ejector block, 7-sealing ring, 8-chamber, 9-air chamber, 10-moving iron, 11-permanent magnet, 12-spring, 13-moving contact, 14-limiting block. Detailed Implementation

[0016] Example 1: A gas-driven switch, such as Figure 1 As shown, it includes: case; Active components, which are movably disposed within the housing; Air chamber 9 is driven and fixedly connected to the movable component inside the housing, and air inlet 2 is connected to air chamber 9; A balancing component, movably connected to the movable component, provides a downward force to the movable component; the balancing component is fixedly connected inside the housing. The stationary contact 5 is fixedly connected to the housing and located at one end of the movable component.

[0017] The housing is a hollow cylindrical structure. The air chamber 9, the balancing assembly, and the stationary contact 5 are respectively disposed inside the housing. The air chamber 9 abuts against the bottom of the balancing assembly and is fixedly connected to the inner side of the housing. An air inlet 2 is connected inside the air chamber 9. One end of the air inlet 2 passes through the housing and is connected to the circuit for receiving high-pressure gas. The balancing assembly is fixed to the inner side of the housing and connected to the movable assembly for providing the movable assembly with a balanced downward force, so that the movable assembly can initially maintain a downward direction. If the stationary contact 5 is located at the top, the movable component initially remains below with a gap between it and the stationary contact 5. After a device malfunctions, high-pressure gas enters the gas chamber 9, and the gas chamber 9 expands, pushing the movable component upward. This disrupts the balance of the balancing component, causing the movable component to move upward and connect with the stationary contact 5, thereby completing the closing action. If the stationary contact 5 is located at the bottom, the movable component is initially held below and connected to the stationary contact 5. If a fault occurs during this period, high-pressure gas enters the gas chamber 9, and the gas chamber 9 expands, pushing the movable component upward. This disrupts the balance of the balancing component, causing the movable component to move upward and away from the stationary contact 5, thereby completing the tripping action.

[0018] Preferably, two air chambers 9 are symmetrically arranged, and the two air chambers 9 are respectively disposed on both sides of the movable component. Each air chamber 9 includes: The chamber 8 is a hollow cavity structure with one end open. The chamber 8 is fixedly connected to the shell. One end of the air inlet 2 is connected to the inside of the chamber 8 and the other end is connected to high-pressure gas. A pneumatic ejector block 6 is connected to one end of the opening of the chamber 8, and the pneumatic ejector block 6 abuts against the movable component; The sealing ring 7 is located between the chamber 8 and the pneumatic ejector block 6.

[0019] The pneumatic ejector block 6 is connected to the chamber 8 via the sealing ring 7 to form a closed air chamber. The air inlet 2 is connected to the chamber 8. The pneumatic ejector block 6 abuts against the movable component. When the device malfunctions, the high-pressure gas enters the chamber 8 through the air inlet 2, causing the sealed air chamber to expand and drive the pneumatic ejector block 6 to move upward. When its pressure exceeds the balancing force of the balancing component, the stable state of the balancing component is broken. The pneumatic ejector block 6 drives the movable component to move upward, thereby realizing the action of opening or closing the circuit breaker.

[0020] Preferably, two balancing components are symmetrically arranged, with each balancing component disposed on one side of the movable component. Each balancing component includes: A permanent magnet 11 is fixedly connected to the housing, and one end of it is connected to the movable component; A spring 12 is arranged side by side with the permanent magnet 11 and fixed on the housing, and one end of the spring 12 is connected to the movable component. The permanent magnet 11 and the spring 12 are connected side by side to the housing, and one end of the permanent magnet 11 and the spring 12 abuts against the movable component. Preferably, the permanent magnet 11 exerts a downward attractive force of 8F on the balancing assembly, and the spring 12 exerts an upward elastic force of 7F on the balancing assembly; the initial state of the balancing assembly is always downward 1F.

[0021] The permanent magnet 11 exerts a downward attractive force on the moving iron 10, the attractive force being 8F, and the spring 12 exerts an upward elastic force on the moving iron 10, the elastic force being 7F. In the initial state, the resultant force of the attractive force and the elastic force is a downward force of 1F.

[0022] Preferably, the movable component includes: a moving contact 13 and a moving iron 10 that is interference-fitted onto the moving contact 13; The moving contact 13 has an I-shaped structure. One end of the air chamber 9 is driven to be connected to one end of the I-shaped structure. The stationary contact 5 is located at one end of the moving contact 13. The other end of the moving contact 13 is provided with a limiting block 14. The moving iron 10 is located in the middle of the I-shaped structure, and the balancing component is movably connected to the side of the moving iron 10 away from the air chamber 9.

[0023] The moving contact 13 is normally kept in a downward position. One end of the moving contact 13 is provided with a stationary contact 5 and the other end is a limiting block 14. When the initial state is open, the moving contact 13 is located at the bottom of the insulating shell 4 and has a gap between it and the stationary contact 5. Under the push of the air chamber 9, it breaks the balance state and contacts the stationary contact 5 located at the upper end. When the initial state is closed, the moving contact 13 is located at the bottom of the insulating shell 4 and contacts the stationary contact 5. Under the push of the air chamber 9, it breaks the balance state and contacts the limiting block 14 located at the upper end.

[0024] The moving iron 10 is interference-fitted in the middle of the I-shaped structure of the moving contact 13. The air chamber 9 is installed in the middle of one side of the moving contact 13 and the moving iron 10 and abuts against the moving contact 13. The balancing assembly is installed in the middle of the other side of the moving contact 13 and the moving iron 10 and is movably connected to the moving iron 10. When the balance is disrupted, the balancing assembly separates from the moving iron 10.

[0025] Preferably, the housing includes: an insulating shell 4 and an upper end plate 1 and a lower end plate 3 respectively connected to both ends of the insulating shell 4, wherein the upper end plate 1 and the lower end plate 3 are connected in parallel or in series in the circuit; The air inlet 2 is disposed through the insulating outer shell 4.

[0026] The insulating shell 4 is a hollow cylindrical structure. The movable component, air chamber 9, balance component and stationary contact 5 are respectively installed inside the insulating shell 4. The upper end plate 1 and the lower end plate 3 are respectively connected to the two ends of the insulating shell 4. The upper end plate 1 and the lower end plate 3 are respectively provided with connection ports. The upper end plate 1 and the lower end plate 3 are fixed to the bypass switch through the connection ports and serve as two terminals of the switch connected in series or parallel in the circuit. The air hole introduces high-pressure gas into the switch pneumatic device.

[0027] Example 2: Based on the same inventive concept, the present invention also provides a method for closing a gas-driven switch, based on the gas-driven switch described above, such as... Figure 2 As shown, it includes: In the initial state of opening, the stationary contact 5 is located at the upper end of the housing, and the movable component is located at the lower end of the housing; When a fault occurs, the expanding high-pressure gas enters the air chamber 9 through the air inlet 2, driving the moving component to move upward and contact the stationary contact 5, thus completing the closing action.

[0028] Preferably, the expanding high-pressure gas enters the gas chamber 9 through the air inlet 2, driving the movable component to move upward and contact the stationary contact 5, completing the closing action, including: The high-pressure gas enters the air chamber through the air inlet 2, driving the pneumatic ejector block 6 to move upward. Its pressure is greater than the downward force of the resultant force of the moving contact 13 in a stable state. After the pneumatic ejector block 6 drives the moving contact 13 to move upward by 1mm, the attraction force of the permanent magnet 11 on the moving iron 10 drops rapidly. At this time, the elastic force of the spring 12 is greater than the attraction force. The higher the moving contact 13 moves, the faster the attraction force decays, while the elastic force of the spring 12 decays linearly and slowly. The elastic force and attraction force continue to rise reasonably and become larger and larger. The moving contact 13 contacts the stationary contact 5 to complete the closing action.

[0029] The moving contact 13 is connected to the lower end plate 3 via a wire. The spring 12, permanent magnet 11, air chamber 9 and insulating shell 4 are fixed together, and the stationary contact 5 is fixed to the upper end plate 1.

[0030] The principle of a pneumatic switch that opens in the initial state and closes after action is as follows: Figure 3 As shown, the moving contact 13 and the moving iron 10 are installed together by interference fit. The permanent magnet 11 exerts a downward attractive force 8F on the moving iron 10, and the spring 12 exerts an upward elastic force 7F on the moving iron 10. The initial state is reasonably downward F. The air chamber 9 and the pneumatic ejector block 6 are connected by the sealing ring 7 to form a closed chamber 8. The air chamber 9 is introduced into the high-pressure gas through the air inlet 2 and expands, driving the pneumatic ejector block 6 to move upward. When its pressure is greater than F, it can break the stable state of the downward resultant force of the moving contact 13. After the pneumatic ejector block 6 drives the moving contact 13 to move upward by 1mm, the attractive force of the permanent magnet 11 on the moving iron 10 drops rapidly. At this time, the elastic force of the spring 12 is greater than the magnetic force of the permanent magnet 11. The higher the moving contact 13 moves, the faster the magnetic force decays, while the elastic force of the spring 12 decays linearly and slowly. The resultant force of the elastic force of the spring 12 and the magnetic force of the permanent magnet 11 continues to rise and becomes larger and larger. Finally, the moving contact 13 contacts the stationary contact 5 to complete the closing action.

[0031] Example 3: Based on the same inventive concept, this invention also provides a method for opening a gas-driven switch, such as... Figure 4 As shown, based on the gas-driven switch described above, it includes: In the initial closed state, the stationary contact 5 is located at the lower end of the housing, and the movable component is located at the lower end of the housing and connected to the stationary contact 5; When a fault occurs, the expanding high-pressure gas enters the air chamber 9 through the air inlet 2, driving the movable component to move upward and contact the limit block 14, thus completing the tripping action.

[0032] Preferably, the expanding high-pressure gas enters the air chamber 9 through the air inlet 2, driving the movable component to move upward and contact the limit block 14, completing the tripping action, including: The high-pressure gas enters the air chamber through the air inlet 2, driving the pneumatic ejector block 6 to move upward. Its pressure is greater than the downward force of the resultant force of the moving contact 13 in a stable state, causing the moving contact 13 and the stationary contact 5 to come into contact. After the pneumatic ejector block 6 drives the moving contact 13 to move upward by 1mm, the attraction force of the permanent magnet 11 on the moving iron 10 drops rapidly. At this time, the elastic force of the spring 12 is greater than the attraction force. The higher the moving contact 13 moves, the faster the attraction force decays, while the elastic force of the spring 12 decays linearly and slowly. The elastic force and attraction force of the spring 12 continue to rise reasonably and become larger and larger. The moving contact 13 contacts the limit block 14 to complete the opening action, and a gap is generated between the moving contact 13 and the stationary contact 5.

[0033] An implementation scheme for a pneumatic switch that is initially closed and then opens: The moving contact is connected to the upper end plate 1 via a wire, wherein the spring 12, the permanent magnet 11, the air chamber body and the insulating shell 4 are fixed together, the limit block 14 is fixed together with the upper end plate 1, and the stationary contact 5 is fixed together with the lower end plate 3.

[0034] The principle of a pneumatic switch that is initially closed and then opens is as follows: Figure 5 As shown, the moving contact 13 and the moving iron 10 are mounted together by an interference fit. The permanent magnet 11 exerts a downward attractive force 8F on the moving iron 10, and the spring 12 exerts an upward elastic force 7F on the moving iron 10. The initial reasonable force is downward F. The air chamber 9 and the pneumatic ejector block 6 are connected by a sealing ring 7 to form a closed chamber 8. High-pressure gas enters the air chamber 9 through the air inlet 2 and expands, driving the pneumatic ejector block 6 to move upward. When the pressure is greater than F, it can break the stable state of the downward resultant force of the moving contact 13, so that the moving contact 13 and the stationary contact 10 can move upward. When contact 5 makes contact; after the pneumatic ejector block 6 moves the moving contact 13 upward by 1mm, the attraction of the permanent magnet 11 to the moving iron 10 drops rapidly. At this time, the elastic force of the spring 12 is greater than the magnetic force of the permanent magnet 11. The higher the moving contact 13 moves, the faster the magnetic force decays, while the elastic force of the spring 12 decays linearly and slowly. The resultant force of the elastic force of the spring 12 and the magnetic force of the permanent magnet 11 continues to rise and becomes larger and larger. Finally, the moving contact 13 contacts the limit block 14 to complete the opening action, and a gap is generated between the moving contact 13 and the stationary contact 5.

[0035] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0036] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0037] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0038] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0039] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of the claims of the present invention pending approval.

Claims

1. A gas-driven switch, characterized in that, include: case; Active components, which are movably disposed within the housing; An air chamber (9) is driven and fixedly connected to the movable component inside the housing, and an air inlet (2) is connected to the air chamber (9). A balancing component, movably connected to the movable component, provides a downward force to the movable component; the balancing component is fixedly connected inside the housing. The stationary contact (5) is fixedly connected to the housing and located at one end of the movable component.

2. A gas-driven switch as described in claim 1, characterized in that, Two air chambers (9) are symmetrically arranged, and the two air chambers (9) are respectively arranged on both sides of the movable component. Each air chamber (9) includes: The chamber (8) is a hollow cavity structure with one end open. The chamber (8) is fixedly connected to the shell. One end of the air inlet (2) is connected to the chamber (8) and the other end is connected to high-pressure gas. A pneumatic ejector block (6) is connected to one end of the opening of the chamber (8), and the pneumatic ejector block (6) abuts against the movable component; A sealing ring (7) is located between the chamber (8) and the pneumatic ejector block (6).

3. A gas-driven switch as described in claim 1, characterized in that, Two balancing components are symmetrically arranged, with each component positioned on one side of the movable component. Each balancing component includes: A permanent magnet (11) is fixedly connected to the housing, and one end of the magnet is connected to the movable component. A spring (12) is arranged side by side with the permanent magnet (11) and fixed on the housing, and one end of the spring (12) is connected to the movable component.

4. A gas-driven switch as described in claim 3, characterized in that, The permanent magnet (11) exerts a downward attractive force of 8F on the balancing assembly, and the spring (12) exerts an upward elastic force of 7F on the balancing assembly; the initial state of the balancing assembly is always downward 1F.

5. A gas-driven switch as described in claim 1, characterized in that, The movable component includes: a moving contact (13) and a moving iron (10) that is interference-fitted onto the moving contact (13). The moving contact (13) has an I-shaped structure. One end of the air chamber (9) is driven to be connected to one end of the I-shaped structure. The stationary contact (5) is located at one end of the moving contact (13). The other end of the moving contact (13) is provided with a limiting block (14). The moving iron (10) is located in the middle of the I-shaped structure, and the balancing component is movably connected to the side of the moving iron (10) away from the air chamber (9).

6. A gas-driven switch as described in claim 1, characterized in that, The housing includes: an insulating shell (4) and an upper end plate (1) and a lower end plate (3) respectively connected to both ends of the insulating shell (4), wherein the upper end plate (1) and the lower end plate (3) are connected in parallel or in series in the circuit; The air inlet (2) is disposed through the insulating shell (4).

7. A method for closing a gas-driven switch, based on the gas-driven switch according to claims 1-6, characterized in that, include: In the initial state of opening, the stationary contact (5) is located at the upper end of the housing, and the movable component is located at the lower end of the housing; When a fault occurs, the expanding high-pressure gas enters the air chamber (9) through the air inlet (2), driving the moving component to move upward and contact the stationary contact (5) to complete the closing action.

8. The closing method of a gas-driven switch as described in claim 7, characterized in that, The expanding high-pressure gas enters the gas chamber (9) through the air inlet (2), driving the movable component to move upward and contact the stationary contact (5), completing the closing action including: The high-pressure gas enters the air chamber through the air inlet (2) and drives the pneumatic ejector block (6) to move upward. Its pressure is greater than the downward force of the resultant force of the moving contact (13) in a stable state. After the pneumatic ejector block (6) drives the moving contact (13) to move upward by 1mm, the attraction of the permanent magnet (11) to the moving iron (10) drops rapidly. At this time, the elastic force of the spring (12) is greater than the attraction force. The higher the moving contact (13) moves, the faster the attraction force decays, while the elastic force of the spring (12) decays linearly and slowly. The elastic force and attraction force continue to rise and become larger and larger. The moving contact (13) contacts the stationary contact (5) to complete the closing action.

9. A method for opening a gas-driven switch, characterized in that, The gas-driven switch according to claims 1-6 is characterized in that it comprises: In the initial state of closing, the stationary contact (5) is located at the lower end of the housing, and the movable component is located at the lower end of the housing and connected to the stationary contact (5); When a fault occurs, the expanding high-pressure gas enters the air chamber (9) through the air inlet (2), driving the moving component to move upward and contact the limit block (14), thus completing the tripping action.

10. The method for opening a gas-driven switch as described in claim 9, characterized in that, The expanding high-pressure gas enters the air chamber (9) through the air inlet (2), driving the movable component to move upward and contact the limit block (14), completing the tripping action including: The high-pressure gas enters the air chamber through the air inlet (2), driving the pneumatic ejector block (6) to move upward. Its pressure is greater than the downward force of the resultant force of the moving contact (13) in a stable state, so that the moving contact (13) and the stationary contact (5) come into contact. After the pneumatic ejector block (6) drives the moving contact (13) to move upward by 1mm, the attraction of the permanent magnet (11) to the moving iron (10) drops rapidly. At this time, the elastic force of the spring (12) is greater than the attraction force. The higher the moving contact (13) moves, the faster the attraction force decays, while the elastic force of the spring (12) decays linearly and slowly. The elastic force and attraction force of the spring (12) continue to rise reasonably and become larger and larger. The moving contact (13) contacts the limit block (14) to complete the opening action, and a gap is generated between the moving contact (13) and the stationary contact (5).

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