A vacuum circuit breaker

Abstract

The present invention relates to the technical field of switchgear, and provides a vacuum circuit breaker, comprising: a mounting frame, a sealed pole component, a mechanical interlocking component and an operating component, wherein the mechanical interlocking component comprises a linkage shaft, a driving connecting rod unit connected to the linkage shaft hub, and an auxiliary switch unit connected to the linkage shaft, wherein the linkage shaft controls the auxiliary switch unit to open and close by rotating; the operating component comprises an electric control operating component, a safety switch component, and a power-off protection component. The above-mentioned vacuum circuit breaker mechanically interlocks the three sealed poles of the sealed pole component through the linkage shaft, and uses the manual lever of the safety switch component to push the positioning plate connected to the linkage shaft hub, so as to ensure that the electric control operating component can only be enabled when the safety switch component is turned on; at the same time, a normally closed electromagnet is used to push the linkage shaft to rotate when the power is off, so as to achieve the purpose of safe use.

Description

Technical Field

[0001] The present invention relates to the technical field of switchgear, and in particular to a vacuum circuit breaker. Background Art

[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 size, light weight, suitable for frequent operation, and arc extinguishing without maintenance, and is widely used in distribution networks. The vacuum circuit breaker is an indoor power distribution device in 3~10kV, 50Hz three-phase AC system. It can be used for protection and control of electrical equipment in industrial and mining enterprises, power plants, and substations. It is particularly suitable for use in places that require oil-free, less maintenance and frequent operation. The circuit breaker can be configured in the central cabinet, double-layer cabinet and fixed cabinet to control and protect high-voltage electrical equipment.

[0003] Most of the existing vacuum circuit breakers can perform electric closing and opening operations and manual opening operations, or perform manual slow closing without load. However, the vacuum circuit breaker may not be able to perform manual fast closing operations when there is no control power or the control circuit is out of control; or the vacuum circuit breaker can perform manual fast closing, but this manual fast closing does not have a free tripping function and cannot meet the functional requirements of the circuit breaker for opening priority. Once the circuit breaker is closed to the short-circuit point, the upper-level circuit breaker will trip, expanding the scope of the accident power outage. In order to ensure the safe use of the vacuum circuit breaker in an emergency, it is particularly important that its corresponding operating components work stably. Summary of the invention

[0004] Based on this, in order to solve the problem of low safety performance of the above-mentioned vacuum circuit breaker, the present invention provides a vacuum circuit breaker, and its specific technical solution is as follows:

[0005] A vacuum circuit breaker, comprising:

[0006] Install the frame;

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

[0008] The mechanical interlocking component includes a linkage shaft, three driving connecting rod units connected to the linkage shaft hub, and an auxiliary switch unit connected to the linkage shaft, wherein the driving connecting rod units are respectively connected to the three sealed poles, and the linkage shaft controls the auxiliary switch unit to open and close by rotating;

[0009] An operating component, arranged on the mounting frame, includes an electric control operating component, a safety switch component, and a power-off protection component;

[0010] The electric control operation component includes a driving electric cylinder and a connecting rod mechanism, wherein the connecting rod mechanism is provided with a first driving part connected to the driving electric cylinder, and a first connecting part connected to the linkage rotating shaft hub; the safety switch component includes a manual shift lever rotatably connected to the mounting frame, and a positioning plate connected to the linkage rotating shaft hub, wherein the manual shift lever is provided with a shifting position, a first top contact position and a second top contact position for top contacting the positioning plate; the power-off protection component includes a normally closed electromagnet provided with an electromagnetic rod and a rotating rod, wherein the rotating rod is provided with a first top contact position for top contacting the electromagnetic rod, and a second top contact position for top contacting the first top contact position.

[0011] The above-mentioned vacuum circuit breaker mechanically interlocks the three sealed poles through the linkage shaft, and uses the manual lever of the safety switch component to push the positioning plate connected to the linkage shaft hub to ensure that the electric control operation component can only be enabled when the safety switch component is turned on; at the same time, the normally closed electromagnet is used to push the linkage shaft to rotate when the power is off, thereby achieving the purpose of safe use.

[0012] Furthermore, the operating component also includes an energy storage reset assembly, the energy storage reset assembly includes a reset unit, an energy storage unit and an opening and closing rod with a hub connected to the linkage rotating shaft, the reset unit is provided with an input part and an output part; the electromagnetic rod of the normally closed electromagnet extends out and touches the input part of the energy storage reset assembly in a power-off state, and performs energy storage action on the energy storage unit; after the normally closed electromagnet is energized, the energy storage unit drives the output part to push the opening and closing rod.

[0013] Further, the energy storage unit includes a first torsion spring, a mechanical rotating shaft, an intermediate rotating shaft, a mechanical crankshaft and a mechanical spring; the rotating rod is provided with a sleeve rod shaft portion for sleeved with the first torsion spring, and a rotation limit arranged on the sleeve rod shaft portion, and the first top contact position forms the input portion; the mechanical rotating shaft is provided with a rotation clamping position, and a rotation outer arc position adapted to the rotation limit; the mechanical crankshaft includes a main journal, a connecting rod journal, and a cam portion concentrically connected to the main journal, and the connecting rod journal is connected to the mechanical spring; the intermediate rotating shaft is provided with a first roller portion adapted to the rotation clamping position, a second roller portion adapted to the cam portion, and a crank arm arranged on the same circumference as the first roller portion, and the first roller portion and the crank arm form the output portion.

[0014] Furthermore, the mechanical shaft includes a rotating rod body, a rotating clamping block mounted on the rotating rod body, a first elastic clamping block, and a second elastic clamping block rotatably connected to the rotating clamping block, and the second elastic clamping block forms the rotating clamping position; the energy storage unit also includes a second torsion spring and a third torsion spring mounted on the rotating rod; the second torsion spring is used to press the first elastic clamping block, and the third torsion spring is used to press the second elastic clamping block.

[0015] Furthermore, the energy storage reset assembly also includes a one-way rotation unit, which includes a main gear sleeved on the main shaft neck, a sub-gear rotatably connected to the mounting frame, a pawl eccentrically arranged on the main gear, a ratchet with a hub connected to the main shaft neck, a pawl top block arranged on the mounting frame, and an elastic member that pushes the pawl into a ratchet slot.

[0016] Furthermore, the circuit breaker also includes a control component; the power-off protection assembly includes a mechanical detection switch and a mechanical electric cylinder arranged on the mounting frame; the rotating rod is provided with a detection position; the mechanical interlocking component also includes a mechanical top block whose hub is connected to the linkage rotating shaft; when the circuit breaker is powered off, the electromagnetic rod of the normally closed electromagnet extends and touches the second top contact position, and the rotating rod rotates, so that the detection position is close to the mechanical detection switch; when the circuit breaker is powered on, the mechanical detection switch detects the detection position and sends an electrical control signal to the control component, and the control component controls the mechanical electric cylinder to push the mechanical top block, so that the linkage rotating shaft rotates.

[0017] Furthermore, the driving connecting rod unit includes a control block, a connecting arm and a driven arm, the linkage rotating shaft is a spline shaft, and the control block is connected to the spline shaft hub; one end of the connecting arm is hinged to the control block, and the other end is hinged to the driven arm; the driven arm is provided with a first hinge part, a second hinge part and a third hinge part arranged in sequence, the first hinge part is hinged to the connecting arm, the second hinge part is hinged to the mounting frame, and the third hinge part is hinged to the sealed pole.

[0018] Furthermore, the connecting rod mechanism includes a first connecting block connected to the linkage shaft hub, a second connecting rod hinged to the first connecting block, and a third connecting rod member hinged to the mounting frame.

[0019] Furthermore, the sealed pole includes an arc extinguishing chamber assembly provided with a plum blossom contact; the plum blossom contact includes an annular bracket, a contact unit arranged in a circumferential manner outside the annular bracket, and an annular spring for fixing the contact unit to the annular bracket, the annular bracket includes a first mounting ring supported at the upper end of the contact unit, a second mounting ring supported at the lower end of the contact 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 bracket are respectively connected to the contact unit through a clamping structure.

[0020] Furthermore, it also includes a positioning component arranged at the bottom of the mounting frame; the positioning component includes a bottom frame, a roller unit arranged on the outside of the bottom frame, and a locking component arranged in the bottom frame; the locking component includes a first locking strip unit arranged at the front end of the bottom frame, a second locking strip unit arranged at the rear end of the bottom frame, and a connecting locking strip unit connecting the first locking strip unit and the second locking strip unit; the first locking strip unit is provided with a swinging locking strip, and the locking portion of the swinging locking strip can be locked in or out relative to the left side of the bottom frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0022] Figure 1 is a schematic structural diagram of a vacuum circuit breaker according to an embodiment of the present invention;

[0023] Figure 2 Schematic diagram of a partial structure of a vacuum circuit breaker according to an embodiment of the present invention Figure 1 ;

[0024] Figure 3 Schematic diagram of a partial structure of a vacuum circuit breaker according to an embodiment of the present invention Figure 1 ;

[0025] Figure 4 The structure of the energy storage reset assembly according to one embodiment of the present invention is shown in FIG. Figure 1 ;

[0026] Figure 5 The structure of the energy storage reset assembly according to one embodiment of the present invention is shown in FIG. Figure 1 ;

[0027] Figure 6 is a schematic structural diagram of a one-way rotating unit according to an embodiment of the present invention;

[0028] Figure 7 is a schematic structural diagram of a rotating rod body, a second torsion spring and a third torsion spring according to an embodiment of the present invention;

[0029] Figure 8 It is a partial structural schematic diagram of the installation frame and operating components according to an embodiment of the present invention;

[0030] Fig. 9 yes Figure 2 A partial enlarged view of point E in the middle;

[0031] Fig.10 yes Figure 3 A partial enlarged view of the F in the middle;

[0032] Fig.11 yes Figure 3 A partial enlarged view of the G in the middle;

[0033] Fig.12 is a schematic diagram of the structure of the plum blossom contact according to an embodiment of the present invention;

[0034] Fig.13 It is a schematic structural diagram of a positioning component according to an embodiment of the present invention.

[0035] Description of reference numerals:

[0036] 1. Installation frame; 2. Sealed pole parts; 3. Mechanical interlocking parts; 4. Operating parts; 5. Control parts; 6. Positioning parts;

[0037] 21. Solid-sealed pole; 22. Plum blossom contact; 23. Arc extinguishing chamber assembly;

[0038] 221, annular bracket; 222, contact unit;

[0039] 2211, first mounting ring; 2212, second mounting ring; 2213, connecting column;

[0040] 31. Linkage shaft; 32. Connecting rod unit; 33. Auxiliary switch unit; 34. Mechanical top block;

[0041] 321, control block; 322, connecting arm; 323, driven arm;

[0042] 41. Electric control operation assembly; 42. Safety switch assembly; 43. Power-off protection assembly; 44. Energy storage reset assembly; 45. Reset unit; 46. Energy storage unit; 47. Opening and closing rod; 48. One-way rotation unit;

[0043] 411, driving electric cylinder; 412, connecting rod mechanism; 413, first connecting block; 414, second connecting rod; 415, third connecting rod member;

[0044] 401, first driving part; 402, first connecting part; 403, input part; 404, output part;

[0045] 421, manual lever; 422, positioning plate;

[0046] 4201, toggle position; 4202, first top connection position; 4203, second top connection position;

[0047] 4301, first top touch position; 4302, second top touch position; 4303, rotation limit; 4304, detection position;

[0048] 431, normally closed electromagnet; 432, rotating rod; 433, mechanical detection switch; 434, mechanical electric cylinder;

[0049] 442, first torsion spring; 443, mechanical shaft; 444, intermediate shaft; 445, mechanical crankshaft; 446, mechanical spring; 447, second torsion spring; 448, third torsion spring;

[0050] 4431, rotation position; 4432, rotation outer arc position;

[0051] 4441, a first roller portion; 4442, a second roller portion; 4443, a crank arm;

[0052] 4451, main journal; 4452, connecting rod journal; 4453, cam portion;

[0053] 4401, rotating rod body; 4402, rotating clamping block; 4403, first elastic clamping block; 4404, second elastic clamping block;

[0054] 481, main gear; 482, secondary gear; 483, pawl; 484, ratchet; 485, pawl top block; 486, elastic member;

[0055] 61. bottom frame; 62. roller unit; 63. clamping assembly; 64. first clamping strip unit; 65. second clamping strip unit; 66. connecting clamping strip unit;

[0056] 641. Swing the card bar. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with its embodiments. It should be understood that the specific implementation methods described herein are only used to explain the present invention and do not limit the protection scope of the present invention.

[0058] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0060] The “first” and “second” mentioned in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0061] like Figure 1 and Figure 2 , Figure 3 As shown, a vacuum circuit breaker in one embodiment of the present invention includes:

[0062] Install frame 1;

[0063] The sealed pole component 2 includes three sealed poles 21, which are arranged at the front end of the mounting frame 1 in a three-phase distribution manner;

[0064] The mechanical interlocking component 3 includes a linkage shaft 31, three driving connecting rod units 32 connected to the hub of the linkage shaft 31, and an auxiliary switch unit 33 connected to the linkage shaft 31. The three driving connecting rod units 32 are respectively connected to the three sealed poles 21. The linkage shaft 31 controls the auxiliary switch unit 33 to open and close by rotating.

[0065] The operating component 4 is arranged on the mounting frame 1, and includes an electric control operating component 41, a safety switch component 42, and a power-off protection component 43;

[0066] The electric control operation component 41 includes a driving electric cylinder 411 and a connecting rod mechanism 412, wherein the connecting rod mechanism 412 is provided with a first driving part 401 connected to the driving electric cylinder 411, and a first connecting part 402 connected to the hub of the linkage shaft 31; the safety switch component 42 includes a manual shift lever 421 rotatably connected to the mounting frame 1, and a positioning plate 422 connected to the hub of the linkage shaft 31, wherein the manual shift lever 421 is provided with a shifting position 4201, a first top contact position 4202, and a second top contact position 4203 for top contacting the positioning plate 422; the power-off protection component 43 includes a normally closed electromagnet 431 provided with an electromagnetic rod, and a rotating rod 432, wherein the rotating rod 432 is provided with a first top contact position 4301 for top contacting the electromagnetic rod, and a second top contact position 4302 for top contacting the first top contact position 4202.

[0067] The above-mentioned vacuum circuit breaker mechanically interlocks the three sealed poles 21 through the linkage shaft 31, and uses the manual lever 421 of the safety switch component 42 to push the positioning plate 422 connected to the hub of the linkage shaft 31, so as to ensure that the electric control operation component 41 can only be enabled when the safety switch component 42 is turned on; at the same time, the normally closed electromagnet 431 is used to push the linkage shaft 31 to rotate when the power is off, so the opening response speed is fast and the structure is safe and reliable, thereby achieving the purpose of safe use.

[0068] like Figure 2 and Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, in one embodiment, the operating component 4 also includes an energy storage reset assembly 44, the energy storage reset assembly 44 includes a reset unit 45, an energy storage unit 46 and an opening and closing rod 47 whose hub is connected to the linkage shaft 31, and the reset unit 45 is provided with an input part 403 and an output part 404; the electromagnetic rod of the normally closed electromagnet 431 extends out and touches the input part 403 of the energy storage reset assembly 44 in the power-off state, and performs energy storage action on the energy storage unit 46; after the normally closed electromagnet 431 is energized, the energy storage unit 46 drives the output part 404 to push the opening and closing rod 47.

[0069] In one embodiment, the energy storage unit 46 includes a first torsion spring 442, a mechanical shaft 443, an intermediate shaft 444, a mechanical crankshaft 445 and a mechanical spring 446; the rotating rod 432 is provided with a sleeve shaft portion for sleeve-engaging the first torsion spring 442, a rotation limit 4303 arranged on the sleeve shaft portion, and a first top contact position 4301 forms an input portion 403; the mechanical shaft 443 is provided with a rotation clamping position 4431 and a rotation outer arc position 4432 adapted to the rotation limit 4303; the mechanical crankshaft 445 is provided with a rotation clamping position 4431 and a rotation outer arc position 4432 adapted to the rotation limit 4303; 45 includes a main journal 4451, a connecting rod journal 4452, and a cam portion 4453 connected concentrically to the main journal 4451, the connecting rod journal 4452 is connected to the mechanical spring 446; the intermediate rotating shaft 444 is provided with a first roller portion 4441 adapted to the rotation position 4431, a second roller portion 4442 adapted to the cam portion 4453, and a crank arm 4443 arranged on the same circumference as the first roller portion 4441, the first roller portion 4441 and the crank arm 4443 form an output portion 404.

[0070] In one embodiment, the mechanical shaft 443 includes a rotating rod body 4401, a rotating clamping block 4402 sleeved on the rotating rod body 4401, a first elastic clamping block 4403, and a second elastic clamping block 4404 rotatably connected to the rotating clamping block 4402, and the second elastic clamping block 4404 forms a rotating clamping position 4431; the energy storage unit 46 also includes a second torsion spring 447 and a third torsion spring 448 sleeved on the rotating rod 432; the second torsion spring 447 is used to press the first elastic clamping block 4403, and the third torsion spring 448 is used to press the second elastic clamping block 4404. In this way, the elastic force trend is generated by the second torsion spring 447 and the third torsion spring 448, and the first elastic clamping block 4403 and the second elastic clamping block 4404 are used to push the rotation limit 4303 and the first roller part 4441 respectively.

[0071] In one embodiment, the energy storage reset assembly 44 also includes a one-way rotation unit 48, which includes a main gear 481 sleeved on the main shaft neck 4451, a sub-gear 482 rotatably connected to the mounting frame 1, a pawl 483 eccentrically arranged on the main gear 481, a ratchet 484 with a hub connected to the main shaft neck 4451, a pawl top block 485 arranged on the mounting frame 1, and an elastic member 486 that pushes the pawl 483 into the slot of the ratchet 484. In this way, when the mechanical spring 446 is storing energy, the elastic member 486 pushes one end of the pawl 483 and inserts the other end of the pawl 483 into the slot of the ratchet 484; when the mechanical spring 446 finishes storing energy, that is, the connecting rod journal 4452 rotates counterclockwise to the farthest point away from the fixed end of the mechanical spring 446, the pawl 483 just rotates counterclockwise to the position of the pawl top block 485, and the pawl top block 485 presses the other end of the pawl 483 and stops the rotation of the ratchet 484.

[0072] In one embodiment, a driving member (not shown) drives the secondary gear 482, and the secondary gear 482 meshes with the main gear 481 to rotate clockwise, and the ratchet 484 rotates clockwise to drive the connecting rod journal 4452 to rotate clockwise to the farthest point away from the fixed end of the mechanical spring 446, and the ratchet 483 just rotates counterclockwise to the position of the pawl top block 485, and the pawl top block 485 presses the other end of the ratchet 483 and causes the other end of the ratchet 483 to disengage from the slot of the ratchet 484, and the main gear 481 can no longer drive the main journal 4451 to rotate. Specifically, the driving member is a driving motor that is transmission-connected to the secondary gear 482.

[0073] In one embodiment, the vacuum circuit breaker also includes a control component 5; the power-off protection assembly 43 includes a mechanical detection switch 433 and a mechanical electric cylinder 434 arranged on the mounting frame 1; the rotating rod 432 is provided with a detection position 4304; the mechanical interlocking component 3 also includes a mechanical top block 34 whose hub is connected to the linkage rotating shaft 31; when the circuit breaker is powered off, the electromagnetic rod of the normally closed electromagnet 431 extends and touches the second top contact position 4302, and the rotating rod 432 rotates, so that the detection position 4304 is close to the mechanical detection switch 433; when the circuit breaker is powered on, the mechanical detection switch 433 detects the detection position 4304 and sends an electrical control signal to the control component 5, and the control component 5 controls the mechanical electric cylinder 434 to push the mechanical top block 34, so that the linkage rotating shaft 31 rotates.

[0074] As shown in the figure and Figure 2 , Figure 7 , Fig. 9 , Fig.10 , Fig.11As shown, in one embodiment, the driving connecting rod unit 32 includes a control block 321, a connecting arm 322 and a driven arm 323, the linkage shaft 31 is a spline shaft, and the control block 321 is connected to the spline shaft hub; one end of the connecting arm 322 is hinged to the control block 321, and the other end is hinged to the driven arm 323; the driven arm 323 is provided with a first hinge part, a second hinge part and a third hinge part arranged in sequence, the first hinge part is hinged to the connecting arm 322, the second hinge part is hinged to the mounting frame 1, and the third hinge part is hinged to the sealed pole 21.

[0075] In one embodiment, the link mechanism 412 includes a first connecting block 413 connected to the hub of the linkage shaft 31, a second connecting rod 414 hinged to the first connecting block 413, and a third connecting rod member 415 hinged to the mounting frame 1. In this way, the third connecting rod member 415 assists the first connecting block 413 and the second connecting rod 414, so that the driving electric cylinder 411 can stably drive the first driving part 401.

[0076] like Figure 1 and Fig.12 As shown, in one embodiment, the sealed pole 21 includes an arc extinguishing chamber assembly 23 provided with a plum blossom contact 22; the plum blossom contact 22 includes an annular bracket 221, contact units 222 arranged in a circumferential manner outside the annular bracket 221, and an annular spring (not shown in the figure) for fixing the contact unit 222 to the annular bracket 221, the annular bracket 221 includes a first mounting ring 2211 supported at the upper end of the contact unit 222, a second mounting ring 2212 supported at the lower end of the contact 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 brackets are respectively connected to the contact unit 222 through a clamping structure. In this way, the annular spring is used to elastically close and open the contact unit 222, so that the contact unit 222 has a certain tilting and swinging ability, which can achieve the effect of self-centering during the docking process, thereby improving the adaptability and reliability of the electrical connection and solving problems such as jamming and inability to stabilize contact and connection due to center offset during docking.

[0077] like Figure 1 and Fig.13As shown, in one embodiment, it also includes a positioning component 6 arranged at the bottom of the installation frame 1; the positioning component 6 includes a bottom frame 61, a roller unit 62 arranged outside the bottom frame 61, and a clamping assembly 63 arranged inside the bottom frame 61; the clamping assembly 63 includes a first clamping strip unit 64 arranged at the front end of the bottom frame 61, a second clamping strip unit 65 arranged at the rear end of the bottom frame 61, and a connecting clamping strip unit 66 connecting the first clamping strip unit 64 and the second clamping strip unit 65; the first clamping strip unit 64 is provided with a swing clamping strip 641, and the clamping portion of the swing clamping strip 641 can be clamped in or out relative to the left side of the bottom frame 61. In this way, the roller unit 62 is used to facilitate the movement of the installation frame 1, so as to perform maintenance work on the vacuum circuit breaker; at the same time, the swing clamping strip 641 of the clamping assembly 63 is extended to fix the installation frame 1 in the adapted clamping strip groove, so as to ensure that the vacuum circuit breaker is stably installed during operation.

[0078] In one of the embodiments, an installation cavity is provided in the installation frame 1, and the installation cavity is divided into a first cavity, a second cavity and a third cavity by a partition plate; the electric control operation component 41 is arranged in the first cavity, the safety switch component 42 is arranged in the second cavity, and the power-off protection component 43 is arranged in the third cavity.

[0079] The specific usage process is as follows:

[0080] When the auxiliary switch unit 33 is closed, the rotating rod 432 is maintained in the closed position due to the torque provided by the first torsion spring 442, and the rotation limit 4303 engages the rotation outer arc position 4432 to prevent the mechanical shaft 443 from rotating. At this time, the first roller portion 4441 of the intermediate shaft 444 contacts the rotation position 4431 and the mechanical spring 446 is in a stretched state.

[0081] When the vacuum circuit breaker is powered off, the electromagnetic rod of the normally closed electromagnet 431 extends out and touches the first top contact position 4301 of the rotating rod 432, and the rotating rod 432 rotates clockwise (the electromagnetic rod of the normally closed electromagnet 431 extends out and the rotating rod 432 rotates in the clockwise direction), and the rotation limit 4303 gives way to the rotating outer arc position 4432. The mechanical shaft 443 rotates due to the torque generated by the second torsion spring 447. As the mechanical shaft 443 rotates clockwise, the rotating position 4431 can rotate. Under the elastic force of the mechanical spring 446, the cam portion 4453 presses the second roller portion 4442, so that the first roller portion 4441 can be rotated away from the rotating position 4431 and rotate clockwise and push the opening and closing rod 47, so that the linkage shaft 31 rotates, and then the auxiliary switch unit 33 is in the open state.

[0082] When closing the switch, the operator needs to first move the manual lever 421 to make the second top connection position 4203 move away from the positioning plate 422 and the first torsion spring 442 to generate an elastic tendency to rotate. The mechanical detection switch 433 detects the position of the detection position 4304 in the rotating rod 432, and the control component 5 controls the mechanical electric cylinder 434 to push the mechanical top block 34 and the linkage shaft 31 to rotate. The opening and closing rod 47 pushes the crank arm 4443 to rotate clockwise, and the second roller part 4442 presses the cam part 4453 to rotate clockwise, and the mechanical spring 446 starts to store energy, that is, it is transformed from a retracted state to a stretched state; at the same time, the first roller part 4441 presses the rotating clamping position 4431 to rotate clockwise. When the rotating outer arc position 4432 disengages from the rotating limit position 4303, the sleeve rod shaft of the rotating rod 432 rotates under the elastic force generated by the first torsion spring 442, thereby clamping the rotating outer arc position 4432 to position it.

[0083] When the mechanical detection switch 433 cannot detect the position of the detection position 4304 in the rotating rod 432, the electric control operation component 41 can perform the opening and closing action normally.

[0084] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A vacuum circuit breaker, characterized in that: include: Install the frame; A sealed pole component, comprising three sealed poles, wherein the three sealed poles are arranged at the front end of the mounting frame in a three-phase distribution manner; The mechanical interlocking component includes a linkage shaft, three driving connecting rod units connected to the linkage shaft hub, and an auxiliary switch unit connected to the linkage shaft, wherein the driving connecting rod units are respectively connected to the three sealed poles, and the linkage shaft controls the auxiliary switch unit to open and close by rotating; An operating component, arranged on the mounting frame, includes an electric control operating component, a safety switch component, and a power-off protection component; The electric control operation assembly includes a driving electric cylinder and a connecting rod mechanism, wherein the connecting rod mechanism is provided with a first driving part connected to the driving electric cylinder and a first connecting part connected to the linkage rotating shaft hub; The safety switch assembly comprises a manual lever rotatably connected to the mounting frame, and a positioning plate connected to the linkage shaft hub, wherein the manual lever is provided with a toggle position, a first top contact position, and a second top contact position for top contact with the positioning plate; The power-off protection assembly includes a normally closed electromagnet provided with an electromagnetic rod and a rotating rod, wherein the rotating rod is provided with a first top contact position for contacting the electromagnetic rod, and a second top contact position for contacting the first top contact position; the operating component also includes an energy storage reset assembly, wherein the energy storage reset assembly includes a reset unit, an energy storage unit, and an opening and closing rod connected to the linkage shaft by a shaft hub, wherein the reset unit is provided with an input part and an output part; The electromagnetic rod of the normally closed electromagnet extends out in a power-off state and contacts the input portion of the energy storage reset assembly, and performs energy storage on the energy storage unit; After the normally closed electromagnet is energized, the energy storage unit drives the output part to push the opening and closing rod; The energy storage unit includes a first torsion spring, a mechanical rotating shaft, an intermediate rotating shaft, a mechanical crankshaft and a mechanical spring; The rotating rod is provided with a sleeve rod shaft portion for sleeve-engaging the first torsion spring, and a rotation limiter arranged on the sleeve rod shaft portion, and the first top contact position forms the input portion; The mechanical shaft is provided with a rotational stop and a rotational outer arc position adapted to the rotational limit; The mechanical crankshaft comprises a main journal, a connecting rod journal, and a cam portion concentrically connected to the main journal, and the connecting rod journal is connected to the mechanical spring; The intermediate rotating shaft is provided with a first roller part adapted to the rotation position, a second roller part adapted to the cam part, and a crank arm arranged on the same circumference as the first roller part, and the first roller part and the crank arm form the output part.

2. A vacuum circuit breaker according to claim 1, characterized in that: The mechanical shaft comprises a rotating rod body, a rotating clamping block sleeved on the rotating rod body, a first elastic clamping block, and a second elastic clamping block rotatably connected to the rotating clamping block, wherein the second elastic clamping block forms the rotating clamping position; The energy storage unit further includes a second torsion spring and a third torsion spring sleeved on the rotating rod; The second torsion spring is used to press the first elastic force clamping block, and the third torsion spring is used to press the second elastic force clamping block.

3. A vacuum circuit breaker according to claim 1, characterized in that: The energy storage reset assembly also includes a one-way rotation unit, which includes a main gear sleeved on the main shaft neck, a sub-gear rotatably connected to the mounting frame, a pawl eccentrically arranged on the main gear, a ratchet wheel with a hub connected to the main shaft neck, a pawl top block arranged on the mounting frame, and an elastic member for pushing the pawl into a ratchet wheel slot.

4. A vacuum circuit breaker according to claim 1, characterized in that: The circuit breaker also includes a control component; The power-off protection assembly includes a mechanical detection switch and a mechanical electric cylinder arranged on the mounting frame; The rotating rod is provided with a detection position; The mechanical interlocking component also includes a mechanical top block with a hub connected to the linkage shaft; When the circuit breaker is powered off, the electromagnetic rod of the normally closed electromagnet extends and touches the second top contact position, and the rotating rod rotates, so that the detection position is close to the mechanical detection switch; When the circuit breaker is powered on, the mechanical detection switch detects the detection position and sends an electric control signal to the control component, and the control component controls the mechanical electric cylinder to push the mechanical push block, thereby causing the linkage shaft to rotate.

5. A vacuum circuit breaker according to claim 1, characterized in that: The driving connecting rod unit comprises a control block, a connecting arm and a driven arm, the linkage rotating shaft is a spline shaft, and the control block is connected to the spline shaft hub; One end of the connecting arm is hinged to the control block, and the other end is hinged to the driven arm; The driven arm is provided with a first hinged portion, a second hinged portion and a third hinged portion which are arranged in sequence, the first hinged portion is hinged to the connecting arm, the second hinged portion is hinged to the mounting frame, and the third hinged portion is hinged to the sealed pole.

6. A vacuum circuit breaker according to claim 1, characterized in that: The connecting rod mechanism comprises a first connecting block connected to the linkage rotating shaft hub, a second connecting rod hinged to the first connecting block, and a third connecting rod member hinged to the mounting frame.

7. A vacuum circuit breaker according to claim 1, characterized in that: The sealed pole comprises an arc extinguishing chamber assembly provided with a plum blossom contact; The plum blossom contact includes an annular bracket, contact units arranged in a circumferential manner outside the annular bracket, and an annular spring for fixing the contact units to the annular bracket. The annular bracket includes a first mounting ring supported on the upper end of the contact unit, a second mounting ring supported on the lower end of the contact unit, and a connecting column connecting the first mounting ring and the second mounting ring. The first mounting ring and the second mounting ring bracket are respectively connected to the contact unit through a clamping structure.

8. A vacuum circuit breaker according to claim 1, characterized in that: Also includes a positioning component arranged at the bottom of the mounting frame; The positioning component includes a bottom frame, a roller unit arranged outside the bottom frame, and a positioning assembly arranged inside the bottom frame; The clamping assembly includes a first clamping strip unit arranged at the front end of the bottom frame, a second clamping strip unit arranged at the rear end of the bottom frame, and a connecting clamping strip unit connecting the first clamping strip unit and the second clamping strip unit; The first clamping bar unit is provided with a swing clamping bar, and the clamping portion of the swing clamping bar can be clamped in or out relative to the left side of the bottom frame.

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