A vacuum circuit breaker

Abstract

The application provides a vacuum circuit breaker, comprising: a mounting frame; a fixed sealed pole component comprising three fixed sealed poles; a mechanical connection component comprising a linkage rotating shaft, three driving link units and an auxiliary switch assembly; an operating component arranged on the mounting frame, comprising a safety switch assembly for switching action of the three fixed sealed poles; the safety switch assembly comprises a driving unit, a ratchet unit and a linkage unit; the ratchet unit comprises a top pressure ratchet block and a ratchet wheel. When the vacuum circuit breaker is powered off, the driving unit drives the auxiliary rotating shaft to rotate, the auxiliary rotating shaft drives the linkage rotating shaft to keep in a breaking state through an auxiliary link set, and the tripping reset is achieved; when the vacuum circuit breaker is powered on, the rotating direction of the auxiliary rotating shaft is limited through the ratchet unit, manual operation is needed to loosen the top pressure ratchet block for reset action, and the possibility of automatic connection of the tripping reset, too large transient voltage and damage of electrical elements is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical switching apparatus, in particular to a vacuum circuit breaker. BACKGROUND

[0002] The vacuum circuit breaker is named because its arc extinguishing medium and the insulating medium of the contact gap after arc extinguishing are both high vacuum; it has the advantages of small volume, light weight, frequent operation, and arc extinguishing without maintenance, and is widely used in distribution networks. The vacuum circuit breaker is an indoor distribution device in a 3-10kV, 50Hz three-phase alternating current system, which can be used for protection and control of electrical equipment in industrial and mining enterprises, power plants, and substations, and is particularly suitable for use in places where oil-free, less maintenance, and frequent operation are required. The vacuum circuit breaker can be configured in a middle cabinet, a double-layer cabinet, and a fixed cabinet for controlling and protecting high-voltage electrical equipment.

[0003] During use, the vacuum circuit breaker disconnects the circuit to avoid safety accidents, but when the vacuum circuit breaker is re-energized after being de-energized, there is a possibility of automatic connection of tripping reset, excessive instantaneous voltage, and damage to electrical components. Moreover, there is a risk of electric shock after the circuit is de-energized, which may cause safety accidents. SUMMARY

[0004] Therefore, in order to solve the above problems, the present application provides a vacuum circuit breaker, and the specific technical scheme is as follows:

[0005] A vacuum circuit breaker, comprising:

[0006] a mounting frame;

[0007] a sealed pole component comprising three sealed poles, which are arranged in a three-phase distribution manner at the front end of the mounting frame;

[0008] a mechanical connection component comprising a linkage shaft, three drive link units connected to the shaft hub of the linkage shaft, and an auxiliary switch assembly connected to the linkage shaft;

[0009] an operating component arranged on the mounting frame, comprising a safety switch assembly for switching action of the three sealed poles;

[0010] The safety switch assembly comprises a drive unit, a ratchet unit, and a linkage unit, the linkage unit comprising an auxiliary shaft and an auxiliary link set connecting the auxiliary shaft and the linkage shaft.

[0011] The ratchet unit comprises a top pressure ratchet block arranged on the mounting frame and a ratchet piece connected to the shaft hub of the auxiliary shaft, and the top pressure ratchet block is adapted to the ratchet piece.

[0012] The vacuum circuit breaker, when powered off, the drive unit drives the auxiliary rotating shaft to rotate, the auxiliary rotating shaft drives the linkage rotating shaft to keep in the open state through the auxiliary linkage group, the trip reset, when the vacuum circuit breaker is powered on, the rotation direction of the auxiliary rotating shaft is limited through the ratchet unit, the linkage rotating shaft cannot be automatically reset, manual operation is needed to loosen the top pressure ratchet block to reset, the possibility of automatic connection of the trip reset and the overlarge transient voltage causing the damage of the electrical components is avoided, and the use safety is ensured.

[0013] Further, the drive unit comprises a drive motor, a first gear arranged at the output end of the drive motor, and a second gear connected with the shaft hub of the auxiliary rotating shaft, the first gear and the second gear are in mesh transmission; the transmission ratio of the first gear and the second gear ranges from 1:10 to 1:25.

[0014] Further, the auxiliary linkage group comprises a first linkage block, a second linkage block and a third linkage block connected with the auxiliary rotating shaft; the first linkage block is provided with a first connecting part, a second connecting part and a third connecting part connected with the shaft hub of the auxiliary rotating shaft; the second linkage block connects the second connecting part and the linkage rotating shaft; the third linkage block connects the third connecting part and the safety switch assembly.

[0015] Further, the mechanical connecting part further comprises a spring pressing assembly; the spring pressing assembly comprises a first spring pressing unit and a second spring pressing unit; the first spring pressing unit comprises a fourth linkage block and a first spring piece, one end of the fourth linkage block is connected with the linkage rotating shaft through the first linkage block, the other end is provided with a connecting head, one end of the first spring piece presses the mounting frame; the second spring pressing unit comprises a spring pressing block arranged on the linkage rotating shaft and a second spring piece, one end of the second spring piece is connected with the spring pressing block, the other end is connected with the mounting frame; the first spring piece and the second spring piece are respectively arranged at the interval of the three solid-sealed poles.

[0016] Further, the ratchet unit further comprises a spring pressing group; the spring pressing group comprises a spring pressing swing arm rotatably connected with the mounting frame, a first torsional spring pressing the spring pressing swing arm to swing outward, a swing linkage connected with the spring pressing swing arm, and a clamping seat rotatably connected with the mounting frame; the top pressure ratchet block is arranged on the clamping seat.

[0017] Further, the safety switch assembly comprises a first switch unit; the first switch unit comprises a first switch group and a first spring pressing group, the first switch group comprises a first button piece rotatably connected with the mounting frame and a first switch block connected with the first button piece; the first spring pressing group comprises a first spring pressing sliding block slidingly arranged on the mounting frame and a first elastic piece driving the first spring pressing sliding block to press the first switch block.

[0018] Further, the safety switch assembly further comprises a second switch unit, the second switch unit comprises a second button piece and a second linkage shaft connected with the second button piece; the third linkage block is provided with a limiting end; the second linkage shaft is provided with a notch matched with the limiting end and a limiting groove shoulder matched with the first switch block.

[0019] Further, the safety switch assembly further comprises a third switch unit; the third switch unit comprises a third switch group and a third locking group, the third switch group comprises a third button piece and a third linkage block connected with the third button piece, the third linkage block is arranged below the first switch block, the third linkage block is provided with a limiting column matched with the first switch block and a locking contact surface; the third locking group comprises a clamping wheel arc plate arranged on the auxiliary rotating shaft and a top piece, the clamping wheel arc plate is provided with a limiting cylinder matched with the locking contact surface and the top piece is matched with the limiting arc groove and tops the limiting cylinder.

[0020] Further, the safety switch assembly further comprises a fourth switch unit; the fourth switch unit comprises a fourth switch group and a fourth locking group; the fourth switch group comprises a fourth button piece and a fourth linkage block connected with the fourth button piece, the fourth linkage block is provided with a swing column at the end; the fourth locking group comprises a swing plate rotatably connected to the mounting frame and a circular ring plate arranged on the auxiliary rotating shaft, the swing plate is provided with a swing arc groove matched with the swing column, and the circular ring plate is provided with a protruding block matched with the end of the swing plate.

[0021] Further, the solid-sealed pole includes an arc-extinguishing chamber assembly provided with a tulip contact; the tulip contact includes a ring-shaped support, a contact piece unit arranged in a circumferential manner outside the ring-shaped support, and a ring-shaped spring for fixing the contact piece unit to the ring-shaped support, the ring-shaped support includes a first mounting ring supported on the upper end of the contact piece unit, a second mounting ring supported on the lower end of the contact piece unit, and a connecting column connecting the first mounting ring and the second mounting ring, and the first mounting ring and the second mounting ring are respectively connected with the contact piece unit through a clamping structure. BRIEF DESCRIPTION OF DRAWINGS

[0022] The application can be further understood from the following description in conjunction with the drawings. The components in the drawings are not necessarily drawn to scale, but emphasis is instead placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0023] Figure 1 is a structural schematic diagram of a vacuum circuit breaker according to an embodiment of the application;

[0024] Figure 2is a sectional view of the structure of the vacuum circuit breaker according to an embodiment of the present application;

[0025] Figure 3 is a structural schematic diagram of the mechanical connecting component and the operating component according to an embodiment of the present application;

[0026] Figure 4 is a structural schematic diagram of the driving unit according to an embodiment of the present application;

[0027] Figure 5 is a structural schematic diagram of the operating component according to an embodiment of the present application Figure 1 ;

[0028] Figure 6 is a structural schematic diagram of the operating component according to an embodiment of the present application Figure 2 ;

[0029] Figure 7 is a sectional view of the structure of the operating component according to an embodiment of the present application Figure 1 ;

[0030] Figure 8 is a sectional view of the structure of the operating component according to an embodiment of the present application Figure 2 ;

[0031] Figure 9 is a sectional view of the structure of the operating component according to an embodiment of the present application Figure 3 ;

[0032] Figure 10 is a structural schematic diagram of the wye contact according to an embodiment of the present application.

[0033] Explanation of reference numerals:

[0034] 1, mounting frame; 2, sealed pole component; 3, mechanical connecting component; 4, operating component;

[0035] 21, sealed pole; 22, wye contact; 23, arc extinguishing chamber assembly;

[0036] 221, annular support; 222, contact plate unit;

[0037] 2211, first mounting ring; 2212, second mounting ring; 2213, connecting column;

[0038] 31, linkage rotating shaft; 32, driving link unit; 33, auxiliary switch assembly; 34, spring pressing assembly;

[0039] 341, first spring pressing unit; 342, second spring pressing unit;

[0040] 3411, fourth link block; 3412, first spring member;

[0041] 3421, elastic block; 3422, second spring member;

[0042] 40, safety switch assembly; 41, driving unit; 42, ratchet unit; 43, linkage unit; 44, first switch unit; 45, second switch unit; 46, third switch unit; 47, fourth switch unit;

[0043] 411, driving motor; 412, first gear; 413, second gear;

[0044] 421, top pressure ratchet block; 422, ratchet member; 423, elastic pressure group; 424, elastic pressure swing arm; 425, first torsion spring; 426, swing link; 427, clamping seat;

[0045] 431, auxiliary rotating shaft; 432, auxiliary linkage group;

[0046] 4321, first linkage block; 4322, second linkage block; 4323, third linkage block;

[0047] 441, first switch group; 442, first elastic pressure group;

[0048] 4411, first button member; 4412, first switch block;

[0049] 4421, first elastic pressure sliding block; 4422, first elastic member;

[0050] 451, second button member; 452, second linkage shaft;

[0051] 461, third switch group; 462, third locking group;

[0052] 4611, third button member; 4612, third linkage block;

[0053] 4621, clamping wheel arc plate; 4622, top member;

[0054] 471, fourth switch group; 472, fourth locking group;

[0055] 4711, fourth button member; 4712, fourth linkage block;

[0056] 4721, swing plate; 4722, circular ring plate. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the present application clearer and more apparent, the present application will be further described in detail below in combination with its embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the protection scope of the present application.

[0058] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. As used herein the terms "vertical", "horizontal", "left", "right" and similar terms are used for explanation only and are not intended to limit the scope of the application.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0060] The "first", "second" in the present application do not represent the specific number and order, but only for the name of the distinction.

[0061] As shown in Figure 1 and Figure 2 、 Figure 3 An embodiment of a vacuum circuit breaker according to the present application comprises:

[0062] a mounting frame 1;

[0063] a sealed pole assembly 2 comprising three sealed poles 21 arranged in a three-phase distribution manner at the front end of the mounting frame 1;

[0064] a mechanical connection assembly 3 comprising a linkage shaft 31, three drive link units 32 connected to the shaft hub of the linkage shaft 31, and an auxiliary switch assembly 33 connected to the linkage shaft 31;

[0065] an operating assembly 4 arranged on the mounting frame 1, comprising a safety switch assembly 40 for switching the three sealed poles 21;

[0066] The safety switch assembly 40 comprises a drive unit 41, a ratchet unit 42, and a linkage unit 43, the linkage unit 43 comprising an auxiliary shaft 431 and an auxiliary link set 432 connecting the auxiliary shaft 431 and the linkage shaft 31;

[0067] The ratchet unit 42 comprises a top pressure ratchet block 421 arranged on the mounting frame 1, and a ratchet piece 422 connected to the shaft hub of the auxiliary shaft 431, the top pressure ratchet block 421 and the ratchet piece 422 being adapted to each other.

[0068] The vacuum circuit breaker, when powered off, the driving unit 41 drives the auxiliary rotating shaft 431 to rotate, the auxiliary rotating shaft 431 drives the linkage rotating shaft 31 to keep in the circuit breaking state through the auxiliary connecting rod group 432, the trip reset, when the vacuum circuit breaker is powered on, the rotation direction of the auxiliary rotating shaft 431 is limited through the ratchet unit 42, the linkage rotating shaft 31 will not automatically reset, manual operation is needed to loosen the top pressure ratchet block 421 to perform the reset action, the possibility of automatic connection of the trip reset and the too large transient voltage causing damage to the electrical components is avoided, and the use safety is ensured.

[0069] As shown in Figure 1 and Figure 3 , Figure 4 In one embodiment, the driving unit 41 includes a driving motor 411, a first gear 412 arranged at the output end of the driving motor 411, and a second gear 413 connected with the shaft hub of the auxiliary rotating shaft 431, the first gear 412 and the second gear 413 are engaged in transmission; the transmission ratio range of the first gear 412 and the second gear 413 is 1:10-1:25. In this way, the auxiliary rotating shaft 431 is rotated by driving the first gear 412 and the second gear 413 in sequence by the driving motor 411, so as to achieve the circuit breaking action of the linkage rotating shaft 31 driven by the auxiliary rotating shaft 431; at the same time, by limiting the transmission ratio range of the first gear 412 and the second gear 413, the driving torque meeting the use requirements is improved.

[0070] As shown in Figure 5 and Figure 6 , Figure 7 In one embodiment, the auxiliary connecting rod group 432 includes a first connecting rod block 4321, a second connecting rod block 4322, and a third connecting rod block 4323 connected with the auxiliary rotating shaft 431; the first connecting rod block 4321 is provided with a first connecting portion, a second connecting portion and a third connecting portion connected with the shaft hub of the auxiliary rotating shaft 431; the second connecting rod block 4322 connects the second connecting portion and the linkage rotating shaft 31; the third connecting rod block 4323 connects the third connecting portion and the safety switch assembly 40. In this way, the auxiliary rotating shaft 431, the linkage rotating shaft 31 and the safety switch assembly 40 are stably connected through the auxiliary connecting rod group 432, so that the entire circuit breaking action is stable and reliable.

[0071] As shown in Figure 3As shown, in one of the embodiments, the mechanical connecting component 3 further comprises a springing assembly 34; the springing assembly 34 comprises a first springing unit 341 and a second springing unit 342; the first springing unit 341 comprises a fourth connecting rod block 3411 and a first spring member 3412, one end of the fourth connecting rod block 3411 is connected with the linkage rotating shaft 31 through the first connecting rod block 4321, and the other end is provided with a connecting head, one end of the first spring member 3412 abuts against the mounting frame 1; the second springing unit 342 comprises a springing block 3421 arranged on the linkage rotating shaft 31 and a second spring member 3422, one end of the second spring member 3422 is connected with the springing block 3421, and the other end is connected with the mounting frame 1; the first spring member 3412 and the second spring member 3422 are respectively arranged at intervals of the three solid-sealed poles 21. In this way, the linkage rotating shaft 31 is springed by the first spring member 3412 and the second spring member 3422, so as to be stably kept in a pass-through state of the circuit in which the vacuum circuit breaker is located; when the driving unit 41 drives the auxiliary rotating shaft 431 to rotate, the auxiliary rotating shaft 431 drives the linkage rotating shaft 31 through the auxiliary connecting rod set 432, so as to keep the first spring member 3412 and the second spring member 3422 in an elastic energy state. Specifically, the first spring member 3412 is compressed, and the second spring member 3422 is stretched.

[0072] In one of the embodiments, the ratchet unit 42 further comprises a springing group 423; the springing group 423 comprises a springing swing arm 424 rotatably connected with the mounting frame 1, a first torsional spring 425 springing the springing swing arm 424 to swing outward, a swing connecting rod 426 connected with the springing swing arm 424, and a clamping seat 427 rotatably connected with the mounting frame 1; the abutting ratchet block 421 is arranged on the clamping seat 427. In this way, the springing swing arm 424 is driven by the first torsional spring 425 to move away from the ratchet member 422, so as to drive the abutting ratchet block 421 of the clamping seat 427 to be clamped on the ratchet member 422, thereby limiting the rotating direction of the auxiliary rotating shaft 431; at the same time, the springing swing arm 424 is manually loosened to move the abutting ratchet block 421 away from the ratchet member 422, so as to perform a resetting action, thereby ensuring the safety in use.

[0073] As Figure 6 and Figure 7 , Figure 8 , Figure 9As shown, in one embodiment, the safety switch assembly 40 comprises a first switch unit 44; the first switch unit 44 comprises a first switch group 441 and a first elastic pressing group 442, the first switch group 441 comprises a first button piece 4411 rotatably connected to the mounting frame 1, and a first switch block 4412 connected to the first button piece 4411; the first elastic pressing group 442 comprises a first elastic pressing sliding block 4421 slidingly arranged on the mounting frame 1, and a first elastic piece 4422 driving the first elastic pressing sliding block 4421 to press the first switch block 4412. In this way, the first elastic pressing sliding block 4421 is provided with a circuit communication mechanism, when the first button piece 4411 is pressed, the first switch block 4412 drives the first elastic pressing sliding block 4421 to overcome the elastic force of the first elastic piece 4422, so that the corresponding circuit communication mechanism of the power-off device is communicated.

[0074] In one embodiment, the safety switch assembly 40 further comprises a second switch unit 45, the second switch unit 45 comprises a second button piece 451, and a second linkage shaft 452 connected to the second button piece 451; the third connecting rod block 4323 is provided with a limiting end; the second linkage shaft 452 is provided with a notch matching the limiting end, and a limiting groove shoulder matching the first switch block 4412. In this way, by pressing the second button piece 451, the second button piece 451 drives the notch on the second linkage shaft 452 to top the limiting end of the third connecting rod block 4323, and the limiting groove shoulder drives the first switch block 4412, so that the third connecting rod block 4323 drives the first connecting rod block 4321, playing a role of controlling the switch.

[0075] In one embodiment, the safety switch assembly 40 further comprises a third switch unit 46; the third switch unit 46 comprises a third switch group 461 and a third locking group 462, the third switch group 461 comprises a third button piece 4611, and a third linkage block 4612 connected to the third button piece 4611, the third linkage block 4612 is arranged below the first switch block 4412, and the third linkage block 4612 is provided with a limiting column matching the first switch block 4412, and a locking contact surface; the third locking group 462 comprises a clamping wheel arc plate 4621 arranged on the auxiliary rotating shaft 431, and a top piece 4622, the clamping wheel arc plate 4621 is provided with a limiting cylinder matching the locking contact surface, and the top piece 4622 matches the limiting arc groove and tops the limiting cylinder. In this way, the third switch group 461 can only drive the top piece 4622 to perform the corresponding switch operation when the first switch block 4412 is pressed down by the first button piece 4411 by linking the first switch block 4412 through the third linkage block 4612.

[0076] In one of the embodiments, the safety switch assembly 40 further comprises a fourth switch unit 47; the fourth switch unit 47 comprises a fourth switch group 471 and a fourth locking group 472; the fourth switch group 471 comprises a fourth button piece 4711 and a fourth linkage block 4712 connected with the fourth button piece 4711, and an oscillating column is arranged at the tail end of the fourth linkage block 4712; the fourth locking group 472 comprises an oscillating plate 4721 rotatably connected to the mounting frame 1 and a ring plate 4722 arranged on the auxiliary rotating shaft 431, and the oscillating plate 4721 is provided with an oscillating arc groove matched with the oscillating column, and the ring plate 4722 is provided with a protruding block matched with the tail end of the oscillating plate 4721. Specifically, when the fourth switch group 471 drives the oscillating plate 4721 to oscillate, the rotation phase of the protruding block on the ring plate 4722 is different from the rotation phase when the auxiliary rotating shaft 431 is driven by the second switch unit 45 to rotate, that is, when the auxiliary rotating shaft 431 is driven by the fourth switch unit 47 to switch off, the top pressure ratchet block 421 is between the ratchets of the ratchet wheel piece 422, and the auxiliary rotating shaft 431 can be restored to the on state by the elastic potential energy provided by the elastic pressing assembly 34.

[0077] In one embodiment, the card wheel arc plate 4621 and the ring plate 4722 are arranged on both sides of the first linkage block 4321 respectively.

[0078] As shown in Figure 1 and Figure 10 In one of the embodiments, the fixed pole 21 comprises an arc extinguishing chamber assembly 23 provided with a quincunx contact 22; the quincunx contact 22 comprises an annular support 221, a contact piece unit 222 arranged in a circumferential manner outside the annular support 221, and an annular spring for fixing the contact piece unit 222 to the annular support 221, the annular support 221 comprises a first mounting ring 2211 supported on the upper end of the contact piece unit 222, a second mounting ring 2212 supported on the lower end of the contact piece unit 222, and a connecting column 2213 connecting the first mounting ring 2211 and the second mounting ring 2212, and the first mounting ring 2211 and the second mounting ring 2212 are connected with the contact piece unit 222 through clamping structures. In this way, the contact piece unit 222 is elastically closed and opened by the annular spring, so that the contact piece unit 222 has a certain tilting and oscillating ability, which can self-align during the butt joint process, and can improve the adaptability and reliability of electrical connection, and solve the problems of jamming and unstable contact connection caused by center offset during butt joint.

[0079] The technical features of the above-mentioned embodiments can be combined in any manner. In order to make the description simple, not all possible combinations of the technical features in the above-mentioned embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0080] The above embodiments only express several implementation manners of the present application, which are described in a more specific and detailed manner, but cannot be understood as a limitation on the patent scope of the present application. It should be noted that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A vacuum circuit breaker, characterized by, The utility model relates to a kind of safety switch, including: Mounting frame; Sealed pole component, including three sealed poles, the three sealed poles are arranged in three-phase distribution mode in the mounting frame front end; Mechanical connection component, including linkage shaft, three drive link units connected with linkage shaft hub, and auxiliary switch assembly connected with linkage shaft; Operating component, set on the mounting frame, including safety switch assembly for the switching action of three sealed poles; The safety switch assembly includes drive unit, ratchet unit and linkage unit, the linkage unit includes auxiliary shaft and auxiliary link group connecting auxiliary shaft and linkage shaft; The ratchet unit includes top pressure ratchet block set on the mounting frame and ratchet wheel connected with the hub of auxiliary shaft, and the top pressure ratchet block is matched with the ratchet wheel; The drive unit includes drive motor, first gear set on the output end of drive motor and second gear connected with the hub of auxiliary shaft, and the first gear and the second gear are engaged transmission; The transmission ratio range of the first gear and the second gear is 1:10~1:25; The auxiliary link group includes first link block, second link block and third link block connected on the auxiliary shaft; The first link block is provided with first connecting part, second connecting part and third connecting part connected with the hub of auxiliary shaft; The second link block connects the second connecting part and the linkage shaft; The third link block connects the third connecting part and the safety switch assembly; The mechanical connection component further includes elastic pressing assembly; The elastic pressing assembly includes first elastic pressing unit and second elastic pressing unit; The first elastic pressing unit includes fourth link block and first spring, one end of the fourth link block is connected with the linkage shaft through the first link block, and the other end is provided with connecting head, and one end of the first spring presses the mounting frame; The second elastic pressing unit includes elastic pressing block set on the linkage shaft and second spring, one end of the second spring is connected with the elastic pressing block, and the other end is connected with the mounting frame; The first spring and the second spring are respectively arranged at the interval of three sealed poles.

2. A vacuum interrupter according to claim 1, characterized in that The ratchet unit further includes elastic pressing group; The elastic pressing group includes elastic pressing swing arm rotatably connected on the mounting frame, first torsional spring for outward swing of elastic pressing swing arm, swing link connected with elastic pressing swing arm and clamping seat rotatably connected on the mounting frame; The top pressure ratchet block is arranged on the clamping seat.

3. A vacuum interrupter according to claim 1, characterized in that The safety switch assembly includes first switch unit; The first switch unit includes first switch group and first elastic pressing group, and the first switch group includes first button connected rotatably on the mounting frame and first switch block connected with the first button; The first elastic pressing group includes first elastic pressing slide block slidably arranged on the mounting frame and first elastic member for driving first elastic pressing slide block to press the first switch block.

4. A vacuum interrupter according to claim 3, characterized in that The safety switch assembly further includes second switch unit, and the second switch unit includes second button and second linkage shaft connected with the second button. The third connecting block is provided with a limiting end; The second linkage shaft is provided with a gap matching the limiting end and a limiting groove shoulder matching the first switch block.

5. A vacuum interrupter according to claim 4, characterized in that The safety switch assembly further comprises a fourth switch unit; The fourth switch unit comprises a fourth switch group and a fourth locking group; The fourth switch group comprises a fourth button piece and a fourth linkage block connected with the fourth button piece, and the fourth linkage block is provided with a swing column at the end thereof; The fourth locking group comprises a swing plate rotatably connected to the mounting frame and a circular ring plate provided on the auxiliary rotating shaft, the swing plate is provided with a swing arc groove matching the swing column, and the circular ring plate is provided with a protruding block matching the end of the swing plate.

6. A vacuum interrupter according to claim 1, characterized in that The fixed sealing pole comprises an arc extinguishing chamber assembly provided with a tulip contact; The tulip contact comprises a ring-shaped support, a contact piece unit arranged in a circumferential manner outside the ring-shaped support, and a ring-shaped spring for fixing the contact piece unit to the ring-shaped support, the ring-shaped support comprises a first mounting ring supported on the upper end of the contact piece unit, a second mounting ring supported on the lower end of the contact piece unit, and a connecting column connecting the first mounting ring and the second mounting ring, and the first mounting ring and the second mounting ring are respectively connected with the contact piece unit through a clamping structure.

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