High-voltage isolating switch

Abstract

The invention provides a high-voltage isolating switch which comprises a supporting bottom plate, a fixing plate arranged on the supporting bottom plate and a telescopic air cylinder fixedly connected with the fixing plate, an output shaft of the telescopic air cylinder penetrates through the fixing plate, and the output shaft, penetrating through the fixing plate, of the telescopic air cylinder is fixedly connected with a fixing block. The fixing block is hinged to a spring assembly. The fixing plate is provided with an extension assembly hinged to the spring assembly. Therefore, faults such as reduction of output driving pressure of the transmission air cylinder and transmission conversion failure caused by the failure state of the electromagnetic valve and the transmission air cylinder can be prevented.

Description

Technical Field

[0001] This invention relates to the field of high-voltage disconnect switch technology, specifically to a high-voltage disconnect switch. Background Technology

[0002] The primary function of a high-voltage disconnector is the opening and closing of its contacts, which is achieved through an operating mechanism. Therefore, the performance and quality of the operating mechanism play a crucial role in the overall performance and reliability of the high-voltage disconnector. The main function of a high-voltage disconnector in a power grid is to provide a clear breaking gap and switch circuits to change the system's operating mode.

[0003] In the prior art, the operating mechanism of a high-voltage disconnector switch uses a transmission cylinder and a solenoid valve to open / close the contacts. However, during long-term daily use, the connection between the solenoid valve and the transmission cylinder may fail to seal, resulting in air leakage. At the same time, when the seal fails, the output driving pressure of the transmission cylinder decreases, the transmission conversion fails, and a jamming failure occurs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a high-pressure disconnect switch for preventing failures such as reduced output driving pressure of the transmission cylinder and transmission conversion failure caused by the failure of the solenoid valve and the transmission cylinder.

[0005] The technical solution adopted by this invention to solve its technical problem is: A high-voltage disconnect switch includes a supporting base plate, a fixed plate disposed on the supporting base plate, and a telescopic cylinder fixedly connected to the fixed plate. The output shaft of the telescopic cylinder passes through the fixed plate, and a fixed block is fixedly connected to the output shaft of the telescopic cylinder passing through the fixed plate. A spring assembly is hinged to the fixed block. An extension assembly is provided on the fixed plate and hinged to the spring assembly.

[0006] In one embodiment, the spring assembly includes a first spring hinged to the fixed block; the extension assembly includes a first extension block fixedly connected to the fixed plate; one end of the first extension block remote from the fixed plate is hinged to the first spring.

[0007] In one embodiment, a spring telescopic channel exists between the first extension block and the output shaft of the telescopic cylinder.

[0008] In one embodiment, the spring assembly includes a first spring hinged to a first end of the fixed block and a second spring hinged to a second end; the extension assembly includes a first extension block and a second extension block fixedly connected to the fixed plate and symmetrically arranged; the end of the first extension block away from the fixed plate is hinged to the first spring, and the end of the second extension block away from the fixed plate is hinged to the second spring.

[0009] In one embodiment, a first spring telescopic channel exists between the first extension block and the output shaft of the telescopic cylinder; a second spring telescopic channel exists between the second extension block and the output shaft of the telescopic cylinder.

[0010] In one embodiment, the output shaft of the telescopic cylinder is located between the first extension block and the second extension block.

[0011] In one embodiment, the support base plate is provided with a support assembly for supporting the output shaft of the telescopic cylinder. The support assembly includes a support frame and a support bearing disposed on the support frame, and the output shaft of the telescopic cylinder extends into the support bearing.

[0012] In one embodiment, a first insulator and a second insulator are provided on the side of the support base plate opposite to the telescopic cylinder. The first insulator is provided with a moving contact assembly, and the second insulator is provided with a stationary contact assembly. The end of the first insulator away from the moving contact assembly passes through the support base plate and is hinged to the output shaft of the telescopic cylinder through a transmission rod.

[0013] In one embodiment, the telescopic cylinder is connected to a first inlet / outlet connector and a second inlet / outlet connector, and both the first inlet / outlet connector and the second inlet / outlet connector are equipped with a solenoid valve and a throttle valve.

[0014] In one embodiment, the supporting base plate is further provided with a control unit board, which is electrically connected to the telescopic cylinder, the intake solenoid valve, the intake throttle valve, the exhaust solenoid valve, and the exhaust throttle valve.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention utilizes a supporting base plate, a fixed plate mounted on the supporting base plate, and a telescopic cylinder fixedly connected to the fixed plate. The output shaft of the telescopic cylinder passes through the fixed plate, and a fixed block is fixedly connected to the output shaft passing through the fixed plate. A spring assembly is hinged to the fixed block. An extension assembly is provided on the fixed plate and hinged to the spring assembly. Therefore, when the circuit is opened, if the air circuit is connected and the high-voltage disconnect switch is in the open state, the telescopic cylinder receives air and extends, pushing the fixed block to tension the spring assembly, achieving mechanical self-locking and opening the circuit. After opening, the compressed air in the telescopic cylinder is discharged. After the compressed air in the telescopic cylinder is discharged, the mechanical self-locking structure remains in the open state, requiring no continuous power supply. It can maintain stability; when closing, the air supply is restored to retract the telescopic cylinder, releasing the tension of the first and second springs. After returning to its original position, the spring assembly is tensioned again, achieving mechanical self-locking to close the circuit. After closing, the compressed air in the telescopic cylinder is discharged. After the compressed air in the telescopic cylinder is discharged, the mechanical self-locking structure maintains the closed state, thus maintaining stability without continuous power supply. Therefore, after the telescopic cylinder opens or closes the high-voltage disconnector, there is no need for a continuous air supply. The mechanical self-locking structure alone can maintain a stable state, thereby significantly reducing energy consumption and system complexity. At the same time, this structure improves the safety and reliability of the system and overcomes the failure of transmission conversion after an unexpected interruption of the air supply in the prior art. Attached Figure Description

[0016] Figure 1 This is a front view of Embodiment 1 of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of the tripping structure of a medium- and high-voltage disconnector; Figure 3 For the present invention Figure 1 Schematic diagram of the closing structure of a medium- and high-voltage disconnector; Figure 4 This is a schematic diagram of the high-voltage disconnector tripping structure in Embodiment 2 of the present invention; Figure 5 This is a schematic diagram of the closing structure of the high-voltage disconnector switch in Embodiment 2 of the present invention.

[0017] In the diagram: 10. Support base plate; 11. First insulator; 12. Second insulator; 13. Moving contact assembly; 14. Stationary contact assembly; 15. Fixing plate; 16. First spring; 17. Second spring; 18. Transmission rod; 20. Telescopic cylinder; 21. Fixing block; 22. First extension block; 23. Second extension block; 31. First air inlet / outlet connector; 32. Second air inlet / outlet connector; 35. Control unit board; 41. Support frame; 42. Support bearing. Detailed Implementation

[0018] To better understand the above technical solutions, exemplary embodiments of this disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0019] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0020] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the coordinate system shown in the accompanying drawings. They are used only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0021] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Example 1 like Figure 1-3As shown, this embodiment includes a supporting base plate 10, a fixing plate 15 disposed on the supporting base plate 10, and a telescopic cylinder 20 fixedly connected to the fixing plate 15; the output shaft of the telescopic cylinder 20 passes through the fixing plate 15, and a fixing block 21 is fixedly connected to the output shaft of the telescopic cylinder 20 passing through the fixing plate 15; in this embodiment, the fixing block 21 is fixedly disposed in the middle of the output shaft of the telescopic cylinder 20; the fixing block 21 includes a fixing part fixedly sleeved on the output shaft of the telescopic cylinder 20 and a hinge part extending outward from the fixing part; a hinge hole is provided on the hinge part, a connecting shaft is disposed in the hinge hole, and rotating blocks are fixed at both ends of the connecting shaft, and the rotating blocks and the hinge part are rotatably connected by bearings.

[0025] The fixing block 21 is hinged to a spring assembly; the spring assembly includes a first spring 16 hinged to the fixing block 21; in this embodiment, one end of the first spring 16 is connected to the hinge portion of the fixing block 21; that is, the first spring 16 is hinged to the hinge portion of the fixing block 21 through a connecting shaft.

[0026] The fixed plate 15 is provided with an extension assembly that is hinged to the spring assembly; the extension assembly includes a first extension block 22 fixedly connected to the fixed plate 15; one end of the first extension block 22 away from the fixed plate 15 is hinged to the first spring 16; in this embodiment, the first extension block 22 and the first spring 16 are hingedly connected by a pin, and the pin passes through the annular hook at the end of the first spring 16 and is fixed to the first extension block 22. When the telescopic cylinder 20 drives the fixed block 21 to move back and forth, it in turn drives the first spring 16 to produce elastic deformation.

[0027] In this embodiment, a spring telescopic channel exists between the first extension block 22 and the output shaft of the telescopic cylinder 20. This spring telescopic channel provides clearance for the deformation of the first spring 16, preventing interference during movement. When the telescopic cylinder 20 drives the fixed block 21 to move away from the fixed plate 15, the first spring 16 is first compressed, and then its elasticity is restored by the continuous pushing of the fixed block 21. That is, after the telescopic cylinder 20 extends to the predetermined position, the first spring 16 maintains a preset elastic deformation to prevent the output shaft of the telescopic cylinder 20 from unexpectedly retracting when there is no air source.

[0028] When the telescopic cylinder 20 retracts, the fixed block 21 moves towards the fixed plate 15, and the first spring 16 is gradually compressed from a preset elastic state. When the telescopic cylinder 20 retracts to the predetermined position, the first spring 16 maintains a preset elastic deformation. This prevents the output shaft of the telescopic cylinder 20 from accidentally extending when there is no air supply. Thus, through the synergistic effect of the reciprocating motion and elastic deformation, the position locking and buffer protection of the telescopic cylinder when there is no air supply is effectively achieved.

[0029] On the side of the support base plate 10 opposite to the telescopic cylinder 20, there is a first insulator 11 and a second insulator 12. The first insulator 11 is provided with a moving contact assembly 13, and the second insulator 12 is provided with a stationary contact assembly 14. The end of the first insulator 11 away from the moving contact assembly 13 passes through the support base plate 10 and is hinged to the output shaft of the telescopic cylinder 20 through the transmission rod 18. Thus, the moving contact assembly 13 and the stationary contact assembly 14 are opened and closed under the drive of the telescopic cylinder 20. When the telescopic cylinder 20 pushes the fixed block 21 to move, it simultaneously drives the transmission rod 18 to move. The transmission rod 18 drives the first insulator 11 and drives the moving contact assembly 13 to move closer to or away from the stationary contact assembly 14, thereby completing the connection and disconnection of the circuit.

[0030] In this embodiment, the first insulator 11 also includes a rotating shaft and a bushing. The rotating shaft is mounted on the support base plate 10 through the bushing, and one end of the rotating shaft is hinged to the transmission rod 18, while the other end is fixedly connected to the first insulator 11. The bushing is welded to the support base plate 10 as a whole to ensure that the rotating shaft rotates smoothly and without axial movement during transmission. When the transmission rod 18 is driven by the telescopic cylinder 20 to generate linear motion, the motion is converted into the swing of the first insulator 11 through the rotating shaft, thereby driving the moving contact assembly 13 to achieve precise opening and closing actions.

[0031] It should be noted that both the moving contact assembly 13 and the stationary contact assembly 14 are existing technologies, meaning they are available for purchase on the market.

[0032] The telescopic cylinder 20 is connected to a first inlet / outlet connector 31 and a second inlet / outlet connector 32. Both the first inlet / outlet connector 31 and the second inlet / outlet connector 32 are equipped with solenoid valves and throttle valves. Thus, the output or input of compressed gas is controlled by the solenoid valves and throttle valves, thereby achieving precise control of the movement of the telescopic cylinder 20.

[0033] The supporting base plate 10 is also equipped with a control unit board 35, which is electrically connected to the telescopic cylinder 20, solenoid valve, and throttle valve. Thus, the control unit board 35 receives external control signals and coordinates the start and stop sequence of the telescopic cylinder 20 and each solenoid valve and throttle valve to realize intelligent control of the opening and closing process of the moving contact assembly 13 and the stationary contact assembly 14. At the same time, it monitors the system air pressure and operation status feedback, dynamically adjusts the intake and exhaust flow, ensures stable operation of the equipment under different load conditions, and improves operational reliability and electrical life.

[0034] The support base plate 10 is also equipped with a grounding seat; the grounding seat is used to reliably connect the support base plate 10 to the earth, effectively drain the induced current and leakage charge generated during equipment operation, and prevent the high voltage side from causing electric shock hazards to the operators; at the same time, during the disconnection process of the moving contact assembly 13 and the stationary contact assembly 14, it suppresses arc reignition and transient overvoltage, and improves the insulation stability of the system.

[0035] In addition, a support assembly for supporting the output shaft of the telescopic cylinder 20 is provided on the support base plate 10. The support assembly includes a support frame 41 and a support bearing 42 disposed on the support frame 41. The output shaft of the telescopic cylinder 20 extends into the support bearing 42. Thus, the radial constraint of the output shaft of the telescopic cylinder 20 by the support bearing 42 effectively reduces the sway and frictional resistance during the movement, ensuring the stability and reliability of the opening and closing action of the moving contact assembly 13 and the stationary contact assembly 14. At the same time, the firm connection between the support frame 41 and the support base plate 10 enhances the rigidity of the overall structure, avoids loosening of components due to vibration or impact, and thus ensures the safe operation of the high-voltage disconnect switch under frequent operation.

[0036] Example 2 like Figure 4-5 As shown, this embodiment includes a supporting base plate 10, a fixing plate 15 disposed on the supporting base plate 10, and a telescopic cylinder 20 fixedly connected to the fixing plate 15; the output shaft of the telescopic cylinder 20 passes through the fixing plate 15, and a fixing block 21 is fixedly connected to the output shaft of the telescopic cylinder 20 passing through the fixing plate 15; in this embodiment, the fixing block 21 is fixedly disposed in the middle of the output shaft of the telescopic cylinder 20; the fixing block 21 includes a fixing part fixedly sleeved on the output shaft of the telescopic cylinder 20 and a first hinge part and a second hinge part extending outward from the fixing part; and the first hinge part and the second hinge part are symmetrically disposed on both sides of the fixing part.

[0037] In this embodiment, both the first hinge portion and the second hinge portion are provided with hinge holes, and a connecting shaft is provided in the hinge holes. Rotating blocks are fixed at both ends of the connecting shaft, and the rotating blocks are rotatably connected to the hinge portion through bearings.

[0038] The fixing block 21 is hinged to a spring assembly; the spring assembly includes a first spring 16 hinged to the first end of the fixing block 21 and a second spring 17 hinged to the second end; the first spring 16 and the second spring 17 are symmetrically arranged on both sides of the fixing block 21; The fixed plate 15 is provided with an extension assembly that is hinged to the spring assembly; the extension assembly includes a first extension block 22 and a second extension block 23 that are fixedly connected to the fixed plate 15 and symmetrically arranged; the end of the first extension block 22 away from the fixed plate 15 is hinged to the first spring 16, and the end of the second extension block 23 away from the fixed plate 15 is hinged to the second spring 17; in this embodiment, the first extension block 22 and the second extension block 23 are fixedly arranged in an "eight" shape on the fixed plate 15, and their outward expansion ends form a stable tension cooperation with the spring assembly, so that the output shaft of the telescopic cylinder 20 maintains a balanced force during reciprocating motion.

[0039] In this embodiment, the first extension block 22 and the first spring 16 are hinged together by a pin, and the pin passes through the annular hook at the end of the first spring 16 and is fixed to the first extension block 22; the second extension block 23 and the second spring 17 are also connected in the same way to ensure structural symmetry and mechanical balance; when the telescopic cylinder 20 drives the fixed block 21 to move back and forth, it drives the first spring 16 and the second spring 17 to produce elastic deformation.

[0040] In this embodiment, a first spring telescopic channel exists between the first extension block 22 and the output shaft of the telescopic cylinder 20; a second spring telescopic channel exists between the second extension block 23 and the output shaft of the telescopic cylinder 20. The first and second spring telescopic channels provide clearance for the deformation of the first spring 16 and the second spring 17, preventing interference during movement. When the telescopic cylinder 20 moves the fixed block 21 away from the fixed plate 15, the first spring 16 and the second spring 17 are first compressed, and then their elasticity is restored by the continuous pushing of the fixed block 21. That is, after the telescopic cylinder 20 extends to the predetermined position, the first spring 16 and the second spring 17 maintain a preset elastic deformation to prevent the output shaft of the telescopic cylinder 20 from unexpectedly retracting when there is no air source. When the telescopic cylinder 20 loses air pressure, the first spring 16 and the second spring 17 maintain the stable position of the output shaft by relying on the pre-stored elastic potential energy, effectively realizing the function of air cut-off and pressure maintenance; and the "eight"-shaped arrangement of the extension components further optimizes the lever arm distribution, improving the structural response accuracy and anti-eccentric load capability.

[0041] When the telescopic cylinder 20 retracts, the fixed block 21 moves towards the fixed plate 15, and the first spring 16 and the second spring 17 are gradually compressed from a preset elastic state. When the telescopic cylinder 20 retracts to the predetermined position, the first spring 16 and the second spring 17 maintain a preset elastic deformation. This prevents the output shaft of the telescopic cylinder 20 from accidentally extending when there is no air supply. Thus, through the synergistic effect of the reciprocating motion and elastic deformation, the position locking and buffer protection of the telescopic cylinder when there is no air supply is effectively achieved.

[0042] On the side of the support base plate 10 opposite to the telescopic cylinder 20, there is a first insulator 11 and a second insulator 12. The first insulator 11 is provided with a moving contact assembly 13, and the second insulator 12 is provided with a stationary contact assembly 14. The end of the first insulator 11 away from the moving contact assembly 13 passes through the support base plate 10 and is hinged to the output shaft of the telescopic cylinder 20 through the transmission rod 18. Thus, the moving contact assembly 13 and the stationary contact assembly 14 are opened and closed under the drive of the telescopic cylinder 20. When the telescopic cylinder 20 pushes the fixed block 21 to move, it simultaneously drives the transmission rod 18 to move. The transmission rod 18 drives the first insulator 11 and drives the moving contact assembly 13 to move closer to or away from the stationary contact assembly 14, thereby completing the connection and disconnection of the circuit.

[0043] In this embodiment, the first insulator 11 also includes a rotating shaft and a bushing. The rotating shaft is mounted on the support base plate 10 through the bushing, and one end of the rotating shaft is hinged to the transmission rod 18, while the other end is fixedly connected to the first insulator 11. The bushing is welded to the support base plate 10 as a whole to ensure that the rotating shaft rotates smoothly and without axial movement during transmission. When the transmission rod 18 is driven by the telescopic cylinder 20 to generate linear motion, the motion is converted into the swing of the first insulator 11 through the rotating shaft, thereby driving the moving contact assembly 13 to achieve precise opening and closing actions.

[0044] It should be noted that both the moving contact assembly 13 and the stationary contact assembly 14 are existing technologies, meaning they are available for purchase on the market.

[0045] The telescopic cylinder 20 is connected to a first inlet / outlet connector 31 and a second inlet / outlet connector 32. Both the first inlet / outlet connector 31 and the second inlet / outlet connector 32 are equipped with solenoid valves and throttle valves. Thus, the output or input of compressed gas is controlled by the solenoid valves and throttle valves, thereby achieving precise control of the movement of the telescopic cylinder 20.

[0046] The supporting base plate 10 is also equipped with a control unit board 35, which is electrically connected to the telescopic cylinder 20, solenoid valve, and throttle valve. Thus, the control unit board 35 receives external control signals and coordinates the start and stop sequence of the telescopic cylinder 20 and each solenoid valve and throttle valve to realize intelligent control of the opening and closing process of the moving contact assembly 13 and the stationary contact assembly 14. At the same time, it monitors the system air pressure and operation status feedback, dynamically adjusts the intake and exhaust flow, ensures stable operation of the equipment under different load conditions, and improves operational reliability and electrical life.

[0047] The support base plate 10 is also equipped with a grounding seat; the grounding seat is used to reliably connect the support base plate 10 to the earth, effectively drain the induced current and leakage charge generated during equipment operation, and prevent the high voltage side from causing electric shock hazards to the operators; at the same time, during the disconnection process of the moving contact assembly 13 and the stationary contact assembly 14, it suppresses arc reignition and transient overvoltage, and improves the insulation stability of the system.

[0048] In addition, a support assembly for supporting the output shaft of the telescopic cylinder 20 is provided on the support base plate 10. The support assembly includes a support frame 41 and a support bearing 42 disposed on the support frame 41. The output shaft of the telescopic cylinder 20 extends into the support bearing 42. Thus, the radial constraint of the output shaft of the telescopic cylinder 20 by the support bearing 42 effectively reduces the sway and frictional resistance during the movement, ensuring the stability and reliability of the opening and closing action of the moving contact assembly 13 and the stationary contact assembly 14. At the same time, the firm connection between the support frame 41 and the support base plate 10 enhances the rigidity of the overall structure, avoids loosening of components due to vibration or impact, and thus ensures the safe operation of the high-voltage disconnect switch under frequent operation.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the technical solutions of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A high-voltage disconnect switch, characterized in that: It includes a support base plate (10), a fixing plate (15) disposed on the support base plate (10), and a telescopic cylinder (20) fixedly connected to the fixing plate (15). The output shaft of the telescopic cylinder (20) passes through the fixing plate (15). A fixing block (21) is fixedly connected to the output shaft of the telescopic cylinder (20) passing through the fixing plate (15). A spring assembly is hinged to the fixing block (21). An extension assembly is provided on the fixing plate (15) and hinged to the spring assembly.

2. The high-voltage disconnector according to claim 1, characterized in that: The spring assembly includes a first spring (16) hinged to the fixed block (21); the extension assembly includes a first extension block (22) fixedly connected to the fixed plate (15); one end of the first extension block (22) away from the fixed plate (15) is hinged to the first spring (16).

3. The high-voltage disconnector according to claim 2, characterized in that: There is a spring telescopic channel between the first extension block (22) and the output shaft of the telescopic cylinder (20).

4. The high-voltage disconnector according to claim 1, characterized in that: The spring assembly includes a first spring (16) hinged to the first end of the fixed block (21) and a second spring (17) hinged to the second end; the extension assembly includes a first extension block (22) and a second extension block (23) fixedly connected to the fixed plate (15) and symmetrically arranged; the end of the first extension block (22) away from the fixed plate (15) is hinged to the first spring (16), and the end of the second extension block (23) away from the fixed plate (15) is hinged to the second spring (17).

5. The high-voltage disconnect switch according to claim 4, characterized in that: There is a first spring telescopic channel between the first extension block (22) and the output shaft of the telescopic cylinder (20); There is a second spring telescopic channel between the second extension block (23) and the output shaft of the telescopic cylinder (20).

6. The high-voltage disconnect switch according to claim 5, characterized in that: The output shaft of the telescopic cylinder (20) is located between the first extension block (22) and the second extension block (23).

7. The high-voltage disconnector according to claim 1, characterized in that: The support base plate (10) is provided with a support assembly for supporting the output shaft of the telescopic cylinder (20). The support assembly includes a support frame (41) and a support bearing (42) disposed on the support frame (41). The output shaft of the telescopic cylinder (20) extends into the support bearing (42).

8. The high-voltage disconnector according to claim 1, characterized in that: The support base plate (10) is provided with a first insulator (11) and a second insulator (12) on the side opposite to the telescopic cylinder (20). The first insulator (11) is provided with a moving contact assembly (13), and the second insulator (12) is provided with a stationary contact assembly (14). The end of the first insulator (11) away from the moving contact assembly (13) passes through the support base plate (10) and is hinged to the output shaft of the telescopic cylinder (20) through the transmission rod (18).

9. The high-voltage disconnector according to claim 1, characterized in that: The telescopic cylinder (20) is connected to a first inlet / outlet connector (31) and a second inlet / outlet connector (32), and both the first inlet / outlet connector (31) and the second inlet / outlet connector (32) are equipped with a solenoid valve and a throttle valve.

10. The high-voltage disconnect switch according to claim 9, characterized in that: The supporting base plate (10) is also provided with a control unit board (35), which is electrically connected to the telescopic cylinder (20), the solenoid valve and the throttle valve.

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