A multifunctional combined vacuum circuit breaker

Abstract

The present invention provides a multifunctional combined vacuum circuit breaker, which comprises a circuit breaker body and an operating mechanism, wherein an operating box is provided with a circuit breaker operating system, an isolating shaft and a grounding shaft are provided at the bottom of the operating box, an operating hole spring sleeve is sleeved on the isolating shaft and the grounding shaft, a grounding interlocking arm is provided on the grounding shaft, the grounding interlocking arm is coordinated with a grounding interlocking plate I, a transverse groove is provided on the operating hole spring sleeve, a closing interlocking plate I which can move up and down is provided on the moving route of the grounding interlocking plate I, the operating hole can be blocked when the grounding is closed through the cooperation of the grounding shaft and the grounding interlocking plate, so as to avoid manual opening and closing operations, and automatic opening and closing operations can also be avoided through the locking of the closing interlocking plate and the locking mechanism, so as to effectively ensure that no erroneous operation of opening and closing occurs in the grounding state.

Description

Technical Field

[0001] The invention relates to the field of high-voltage electrical appliances, and in particular to a multifunctional combined vacuum circuit breaker. Background Art

[0002] At present, in order to ensure personal safety, high-voltage electrical equipment should have five anti-error functions: preventing accidental opening and closing of circuit breakers, preventing opening and closing of disconnectors under load, preventing hanging (closing) of grounding wires (grounding switches) under power, preventing power supply with ground wires, and preventing accidental entry into live intervals. These five protections are the most important part of power safety.

[0003] How to more effectively prevent the vacuum circuit breaker from misoperation when it is working or in the grounding state is an important indicator to ensure the safety and reliability of the vacuum circuit breaker. Summary of the invention

[0004] In order to overcome the above technical deficiencies, the present invention provides a multifunctional combined vacuum circuit breaker.

[0005] The present invention provides a multifunctional combined vacuum circuit breaker, which comprises a circuit breaker body and an operating mechanism, wherein the operating mechanism comprises an operating box, an operating panel is arranged on the operating box, a circuit breaker operating system is arranged in the operating box, an isolation shaft and a grounding shaft are arranged at the bottom of the operating box, an operating hole spring sleeve is sleeved on the isolation shaft and the grounding shaft, a grounding interlocking arm is arranged on the grounding shaft, the grounding interlocking arm is coordinated with a grounding interlocking plate I, a transverse groove is arranged on the operating hole spring sleeve, and the grounding interlocking plate I has a grounding shaft that forms a limit when the grounding shaft is grounded. A closing interlocking plate I which can move up and down is provided on the moving route of the grounding interlocking plate I, and a limiting pin is provided on the top of the closing interlocking plate I. The circuit breaker operating system is provided with a locking mechanism, and the locking mechanism includes a locking member, and a limiting slot matched with the limiting pin is provided at the lower end of the locking member. The closing interlocking plate I has a first state of limiting cooperation with the locking member when the grounding shaft is grounded and closed, and a second state of releasing the limiting cooperation with the locking member when the grounding shaft is grounded and opened.

[0006] A circular hole is arranged on the operating hole spring sleeve corresponding to the grounding shaft, a slidable locking pin is arranged in the circular hole, and an unlocking mechanism for controlling the movement of the locking pin is arranged at the end of the locking pin.

[0007] The unlocking mechanism comprises a locking bracket hingedly arranged with the side wall of the operation box, and the end of the locking pin is hingedly arranged with the locking bracket.

[0008] The circuit breaker operating system includes a main frame arranged in the operating box, which includes an energy storage transmission mechanism, a closing mechanism, an opening mechanism and a transmission mechanism arranged in the main frame. The main frame is composed of a first side plate and a second side plate. The energy storage transmission mechanism includes an energy storage motor arranged on the first side plate, a gear transmission system linked with the energy storage motor, and an energy storage shaft system linked with the gear transmission system. The energy storage shaft system includes an energy storage shaft linked with the gear transmission system, a closing crank arm and an opening cam. The closing crank arm is provided with a first spring hanging plate and a second spring hanging plate constituting a sliding match. At least one energy storage spring is hung between the first spring hanging plate and the second spring hanging plate, a closing retainer is provided on the opening cam, the closing mechanism includes a closing control mechanism and a closing retaining latch assembly, the opening mechanism includes an opening control mechanism and an opening retaining latch assembly, one end of the closing retaining latch is contacted with the top block of the closing control mechanism, and the other end is limitedly matched with the operating shaft of the transmission mechanism, one end of the opening retaining latch assembly is contacted with the top block of the opening control mechanism, and the other end is contacted with the closing retainer, and the closing retaining latch assembly and the opening retaining latch assembly are coaxially arranged

[0009] An electromagnetic locking mechanism is provided on the main frame, and the electromagnetic locking mechanism includes an electromagnetic locking coil and a locking part. The electromagnetic locking coil cooperates with the locking pin shaft. One end of the locking part is hinged to the opening switch retaining latch assembly, and the other end of the locking part is provided with a clamping portion adapted to the locking pin shaft. The locking part is provided with a locking slide groove, and forms a sliding cooperation with the locking positioning pin arranged on the main frame.

[0010] The isolating shaft is connected to the isolating switch through an isolating operating mechanism, the grounding shaft is connected to the grounding switch through a grounding operating mechanism, the isolating shaft sleeve is provided with a closing interlocking plate which cooperates with it in linkage, the grounding shaft is sleeved with a grounding interlocking plate which cooperates with it in linkage, the lower end of the closing interlocking plate is provided with a first latch part, the upper end of the grounding interlocking plate is provided with a second latch part, a locking roller is provided between the first latch part and the second latch part, the locking roller has a first state in which it cooperates with the grounding interlocking plate in a limiting manner when the first latch part is pressed, and a second state in which it cooperates with the closing interlocking plate in a limiting manner when the second latch part is pressed.

[0011] The upper end of the closing interlocking plate is provided with an interlocking mechanism linked with the circuit breaker operating mechanism.

[0012] Both sides of the upper end of the closing interlocking plate are provided with interlocking grooves which form a limiting match with the interlocking mechanism, and the two interlocking grooves respectively form a limiting match with the interlocking mechanism when closing and opening the switch.

[0013] The interlocking mechanism comprises an interlocking operating mechanism which cooperates with a interlocking rod in linkage, and the interlocking rod is driven by the interlocking operating mechanism to have a first state in which the interlocking plate is limited and a second state in which the interlocking plate is released.

[0014] The interlocking operating mechanism comprises an operating shaft, an interlocking crank arm linked with the operating shaft, a gate-opening roller linked with the operating shaft, and a gate-opening cam linked with the gate-opening roller. The interlocking crank arm is linked with a locking rod.

[0015] The beneficial effects of the present invention are as follows: through the cooperation between the grounding shaft and the grounding interlocking plate, the operating hole can be blocked when the ground is closed to avoid manual opening and closing operations. Through the locking of the closing interlocking plate and the locking mechanism, automatic opening and closing operations can also be avoided, effectively ensuring that no erroneous opening and closing operations will occur in the grounding state. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the present invention.

[0017] Figure 2 It is a schematic diagram inside the operation box of the present invention.

[0018] Figure 3 It is a three-dimensional schematic diagram of the operating box of the present invention.

[0019] Figure 4 It is a local schematic diagram of the ground axis.

[0020] Figure 5 It is a structural schematic diagram of the operating mechanism of the present invention.

[0021] Figure 6 This is a schematic diagram of the structure of the main frame of the present invention. Figure 1 .

[0022] Figure 7 This is a schematic diagram of the structure of the main frame of the present invention. Figure 2 .

[0023] Figure 8 It is an internal schematic diagram of the main frame of the present invention. Figure 1 .

[0024] Fig. 9 It is an internal schematic diagram of the main frame of the present invention. Figure 2 .

[0025] Fig.10 It is a schematic diagram of the cooperation between the closing holding latch and the operating shaft of the present invention.

[0026] Fig.11 It is a front view of the closing holding latch and the operating shaft of the present invention.

[0027] Fig.12It is a structural schematic diagram of the energy storage indicating mechanism of the present invention.

[0028] Fig.13 It is a structural schematic diagram of the opening and unlocking mechanism of the present invention.

[0029] Fig.14 It is a schematic diagram of the grounding state of the interlocking mechanism of the circuit breaker, the isolating switch and the grounding switch of the present invention.

[0030] Fig.15 It is a schematic diagram of the isolated and connected states of the interlocking mechanism of the circuit breaker, the isolating switch and the earthing switch of the present invention.

[0031] Fig.16 It is a schematic diagram of the disconnected and grounded states of the interlocking mechanism of the circuit breaker, the disconnecting switch and the grounding switch of the present invention.

[0032] Fig.17 The invention is a schematic structural diagram of a closing interlocking plate and a grounding interlocking plate of an interlocking mechanism of a circuit breaker, an isolating switch and a grounding switch.

[0033] Fig.18 This is a partial enlarged schematic diagram of the interlocking operating mechanism of the present invention. Figure 1 .

[0034] Fig.19 This is a partial enlarged schematic diagram of the interlocking operating mechanism of the present invention. Figure 2 .

[0035] Fig. 20 It is a three-dimensional diagram of the combined sealed pole Figure 1 .

[0036] Fig.21 It is a three-dimensional diagram of the combined sealed pole Figure 2 .

[0037] Fig. 22 It is a cross-sectional schematic diagram of a combined sealed pole.

[0038] Fig.23 It is a structural schematic diagram of the isolation crank arm of the combined sealed pole.

[0039] Fig.24 It is a structural schematic diagram of the conductive block of the combined sealed pole. DETAILED DESCRIPTION

[0040] The embodiments of the present invention are further described below in conjunction with the accompanying drawings:

[0041] As shown in the figure, the present invention provides a multifunctional combined vacuum circuit breaker, which includes a circuit breaker body and an operating mechanism, wherein the operating mechanism includes an operating box 1, an operating panel is provided on the operating box, a circuit breaker operating system is provided in the operating box, an isolation shaft 34 and a grounding shaft are provided at the bottom of the operating box, an operating hole spring sleeve is sleeved on the isolation shaft and the grounding shaft, a grounding interlocking arm is provided on the grounding shaft, the grounding interlocking arm is coordinated with the grounding interlocking plate 1, a transverse groove is provided on the operating hole spring sleeve, and the grounding interlocking plate 1 has a grounding shaft that is connected to the grounding shaft when the grounding is closed and forms a spring sleeve with the transverse groove. A first state of limit cooperation and a second state of releasing the limit cooperation with the transverse groove when the grounding shaft is grounded and opened, a closing interlocking plate I4 that can move up and down is provided on the moving route of the grounding interlocking plate I5, a limit pin shaft 6 is provided at the top of the closing interlocking plate I, the circuit breaker operating system is provided with a locking mechanism, the locking mechanism includes a locking piece 14, and a limit slot matched with the limit pin shaft is provided at the lower end of the locking piece. The closing interlocking plate I has a first state of limiting cooperation with the locking piece when the grounding shaft is grounded and closed, and a second state of releasing the limit cooperation with the locking piece when the grounding shaft is grounded and opened.

[0042] The front end of the grounding interlocking plate 1 is provided with a broken line shape, and extends upward from front to back. Through the high and low position design, the grounding interlocking plate 1 can slide forward when the grounding shaft rotates, and snap into the horizontal groove 7 of the operating hole spring sleeve, which can prevent the manual operation structure from being inserted into the opening and closing operation hole. When the broken line structure slides toward the front end, it will gradually lift the closing interlocking plate 1, and the limit pin on the closing interlocking plate 1 will snap into the limit slot of the locking piece, which can directly lock the locking piece, thereby making the opening operation impossible. A roller is set at the bottom end of the closing interlocking plate 1, which is easier to cooperate with the grounding interlocking plate 1 and reduces friction.

[0043] And on the grounding interlocking plate 1, an isolation indicator plate and a grounding interlocking indicator plate fixedly connected thereto are respectively provided, which play an external indication role when the grounding interlocking plate 1 is in action.

[0044] A circular hole is provided on the operating hole spring sleeve 3 corresponding to the grounding shaft, a slidable interlocking pin is provided in the circular hole, and an unlocking mechanism for controlling the movement of the interlocking pin is provided at the end of the interlocking pin 8. The unlocking mechanism includes an interlocking bracket 2 hingedly arranged with the side wall of the operating box, and the end of the interlocking pin is hingedly arranged with the interlocking bracket. By pressing the interlocking bracket, the interlocking pin can be driven to slide, thereby releasing the limit on the operating hole of the grounding switch.

[0045] The circuit breaker operating system includes a main frame arranged in an operating box, and the main frame consists of a first side plate 21 and a second side plate 22. The first side plate and the second side plate are fixedly connected by a supporting column and divided into three spaces for fixing related mechanisms.

[0046] The vacuum circuit breaker operating mechanism includes an energy storage transmission mechanism, a closing mechanism, an opening mechanism and a transmission mechanism arranged in the main frame. The energy storage transmission mechanism is located in the second side plate 22 and the space between the second side plate 22 and the first side plate 21. The energy storage transmission mechanism includes an energy storage motor 28 arranged on the first side plate 21, a gear transmission system linked with the energy storage motor 28, and an energy storage shaft system linked with the gear transmission system. The energy storage shaft system includes an energy storage shaft 29 linked with the gear transmission system, a closing crank arm 25 and an opening cam 12. The energy storage shaft 29 passes through the first side plate and the second side plate, and the closing crank arm 25 and the opening cam 12 are respectively located at the two ends of the energy storage shaft, and the energy storage shaft is located between the first side plate and the second side plate and is connected to the gear transmission system.

[0047] The gear transmission system includes a gear set and a sprocket set, the gear set includes a first gear 218 that cooperates with the energy storage motor 28 and a second gear 219 that is meshed with the first gear, the sprocket set includes a small sprocket coaxially arranged with the second gear, a large sprocket that cooperates with the energy storage shaft, and a chain connecting the small sprocket and the large sprocket together, and an operating member 224 for manual energy storage is set on the transmission shaft where the first gear is located.

[0048] The closing crank arm is provided with a first spring hanging plate and a second spring hanging plate that form a sliding fit. The first spring hanging plate 24 is U-shaped, and the second spring hanging plate 23 is T-shaped. The two are inserted into each other to form a sliding fit. One end of the second spring hanging plate is hinged on the second side plate, and one end of the first spring hanging plate is hinged to the closing crank arm, and the other end of the second spring hanging plate forms a limited sliding fit with the other end of the first spring hanging plate, and at least one energy storage spring is hung between the two ends. A limit plate is clamped at the horizontal end of the first spring hanging plate, and two through-holes are provided on the first limit plate, and the vertical end of the second spring hanging plate passes through the through-hole and is provided with a second limit plate at the end, and an energy storage spring is provided between the second limit plate and the first limit plate, so that the first spring hanging plate, the second spring hanging plate and the energy storage spring constitute an energy storage mechanism, and the energy storage operation of the energy storage mechanism can be realized by rotating the cooperative crank arm.

[0049] A switch-off cam is arranged at the other end of the energy storage shaft, and a switch-on retaining member is arranged on the switch-off cam. The switch-on retaining member is directly fixed to the switch-off cam by bolts and is used as a switch-on retaining limit.

[0050] The closing mechanism includes a closing control mechanism and a closing holding latch assembly, and the opening mechanism includes an opening control mechanism and an opening holding latch assembly. One end of the closing holding latch is arranged in contact with the top block of the closing control mechanism, and the other end is limitedly engaged with the operating shaft of the transmission mechanism. One end of the opening holding latch assembly is arranged in contact with the top block of the opening control mechanism, and the other end is arranged in contact with the closing retaining member. The closing holding latch assembly and the opening holding latch assembly are coaxially arranged.

[0051] The opening brake holding latch assembly includes a driving member that cooperates with the top block and an opening brake holding latch. The opening brake holding latch is hinged to the main frame in the middle, one end is fixedly connected to the driving member, and the other end is cooperated with the closing brake holding member.

[0052] The driving member is rotatably arranged on the first side plate, and its lower end cooperates with the opening retaining latch, and the other end is located on the movable path of the top block. The top block presses the driving member 215, so that the driving member can drive the opening retaining latch 216 to rotate, thereby releasing the original state of conflict with the closing retaining member 217, allowing the opening cam 12 to rotate and complete the opening.

[0053] The closing latch assembly includes a driving member 215 that cooperates with the top block, a closing half shaft, and a closing latch. The upper end of the closing latch is set against the closing half shaft 220, and the lower end of the closing latch 221 is set against the operating shaft. A notch 222 is provided on the closing half shaft, and the closing half shaft can support the closing latch 221, so that the lower end of the closing latch supports the operating shaft to rotate and prevent it from opening. When the driving member is pushed by the top block, the closing half shaft rotates, so that the notch is in contact with the upper end of the closing latch. At this time, the force on the upper end of the closing latch disappears, so the closing latch rotates, releasing the pressure on the operating shaft, so that the insulating pull rod in the pole is pulled downward to achieve opening.

[0054] The opening control mechanism 213 includes an opening coil, a top block sleeved in the opening coil, and an opening button, and the closing control mechanism 211 includes a closing coil, a top block sleeved in the closing coil, and a closing button. When the opening coil or the closing coil is energized, the top block can be ejected from the opening coil or the closing coil to achieve automatic opening and closing control, and an opening button and a closing button are respectively arranged at the other ends of the two coils, and the opening and closing operations can also be achieved by manually pressing the two buttons.

[0055] The main frame is provided with an electromagnetic locking mechanism, which includes an electromagnetic locking coil and a locking member 214. The electromagnetic locking coil 229 is linked with a locking pin 230. One end of the locking member 214 is hinged with the opening gate holding latch assembly. The other end of the locking member is provided with a clamping portion adapted to the locking pin. The locking member is provided with a locking slot and forms a sliding fit with the locking positioning pin provided on the main frame. When the battery locking coil is energized, the locking pin will retract to release the limit on the locking member. At this time, the locking member can be driven by the opening gate holding latch. Otherwise, due to the presence of the locking pin, the opening gate holding latch will not rotate, which can ensure that the opening gate cannot be manually operated when the electromagnetic locking coil loses power.

[0056] The transmission mechanism includes an operating shaft and a pull rod assembly 27 that cooperates with the operating shaft. The pull rod assembly is provided with a plurality of fixings 26 fixedly connected to the insulating pull rods of the vacuum interrupter poles and a disconnection tension spring that is arranged perpendicular to the action direction of the fixings.

[0057] The main frame is provided with an energy storage indicating mechanism. An indicating plate 210 is provided at the lower end of the closing crank arm, one end of the indicating plate is hinged, and the other end is located at the lower end of the closing crank arm. When the closing crank arm moves downward, the indicating plate 210 will move downward, a micro switch is provided at the lower end of the indicating plate, and a trigger plate is provided on the indicating plate, which can contact the micro switch when pressed down, and a hook is provided at the other end of the indicating plate, and the hook is linked with the energy storage indicating plate 226.

[0058] The main frame is provided with a switch-opening unlocking mechanism, and a linkage member 227 is linked to the operating shaft. The linkage member is arranged close to the second side plate, and a pin is fixedly arranged at the upper end of the linkage member. The pin is just located on the outside of the driving member of the switch-opening mechanism. When the operating shaft opens and closes the switch, it drives the pin to move up and down through the linkage member, thereby realizing the limit release operation of the switch-opening mechanism. At the same time, a hook is provided at the other end of the linkage member, which is connected to the switch-opening and closing indicator plate 228 for switch-opening and closing indication.

[0059] The interlocking mechanism between the circuit breaker and the isolating switch and the earthing switch includes an isolating shaft 34 and a earthing shaft 37. The isolating shaft 34 is connected to the isolating switch through an isolating operating mechanism. The isolating operating mechanism includes a first isolating crank arm 321 that cooperates with the isolating shaft 34. The first isolating crank arm 321 is connected to the second isolating crank arm 323 through an isolating linkage shaft 322. The second isolating crank arm 323 is connected to the isolating shaft I31. The isolating shaft I31 cooperates with the isolating blade 39, and the isolating shaft I31 is connected to the tension spring through the third isolating crank arm 324, and the other end of the tension spring is fixed to the outer casing.

[0060] The grounding shaft 37 is connected to the grounding switch 38 through a grounding operating mechanism. The grounding operating mechanism includes a grounding crank arm that cooperates with the grounding shaft. The grounding crank arm is connected to the housing through a tension spring.

[0061] The isolating shaft 34 is sleeved with a closing interlocking plate 33 which cooperates with it, and the grounding shaft 37 is sleeved with a grounding interlocking plate 36 which cooperates with it. The lower end of the closing interlocking plate 33 is provided with a first latch part 318, and the first latch part 318 is a structure with one end recessed and the other end protruding.

[0062] The upper end of the grounding interlocking plate 36 is provided with a second latch portion 320 , and the second latch portion 320 is also a structure with one end recessed and the other end protruding.

[0063] A locking roller 35 is provided between the first locking portion 318 and the second locking portion 320 , and one end of the locking roller 35 is hinged to the housing.

[0064] The interlocking roller 35 has a first state in which it cooperates with the grounding interlocking plate 36 when the first latch portion 318 is pressed, and a second state in which it cooperates with the closing interlocking plate 33 when the second latch portion 320 is pressed.

[0065] When the isolating switch is closed, the closing interlocking plate 33 is driven to rotate by the isolating shaft 34. At the same time, the protrusion of the first latch portion 318 of the closing interlocking plate 33 presses the interlocking roller into the depression of the second latch portion 320 of the grounding interlocking plate. Since the first latch portion 318 presses against the interlocking roller, the grounding interlocking plate is limited by the interlocking roller 35 and cannot rotate. At this time, the grounding switch cannot be operated.

[0066] When the isolating switch is opened, the closing interlock plate 33 is rotated by the isolating shaft, and the protrusion of the first latch portion 318 of the closing interlock plate 33 leaves the upper end of the interlock roller 35. At this time, the limit of the interlock roller 35 on the grounding interlock plate is released. At this time, the grounding interlock plate can be selected, so the grounding switch can be operated.

[0067] When the grounding switch is closed, the grounding shaft 37 drives the grounding interlock plate to rotate. At this time, the protrusion of the second latch part of the grounding interlock plate presses the interlock roller upward, so that the interlock roller is embedded in the recess of the first latch part of the closing interlock plate, thereby realizing the limiting of the closing interlock plate by the interlock roller, so that the isolating switch cannot be operated.

[0068] The upper end of the closing interlocking plate is provided with an interlocking mechanism linked with the circuit breaker operating mechanism. The interlocking mechanism can limit the closing interlocking plate when the disconnector is opened or closed, so as to avoid misoperation during opening or closing.

[0069] Both sides of the upper end of the closing interlock plate 33 are provided with interlock grooves that form a limit fit with the interlock mechanism, and the two interlock grooves form a limit fit with the interlock mechanism when closing and opening the switch, respectively. That is, the interlock mechanism is used to achieve two state restrictions, that is, when the switch is closed, the interlock mechanism limits the closing interlock plate so that it cannot be opened manually, or when the switch is opened, the interlock mechanism limits the closing interlock plate so that it cannot be closed manually.

[0070] The closing interlocking plate 33 is provided with a guide groove, in which a guide pin shaft 310 is provided. The guide groove is an arc-shaped structure, distributed with the isolation shaft as the center, and limits the movement trajectory of the closing interlocking plate.

[0071] A displacement groove is provided at the bottom end of the grounding interlocking plate, and a limit pin 311 is provided in the displacement groove. The limit pin 311 can slide along the displacement groove, and the two ends of the displacement groove correspond to the grounding open and grounding closed states respectively, and are distributed in an arc with the grounding axis as the center, so as to limit the moving trajectory of the grounding interlocking plate.

[0072] The interlocking mechanism includes an interlocking operating mechanism that cooperates with the interlocking rod 32. The interlocking rod is driven by the interlocking operating mechanism to have a first state of limiting with the closing interlocking plate and a second state of releasing the limiting with the closing interlocking plate. The interlocking rod can be pulled, extended or retracted by the interlocking operating mechanism, thereby limiting and releasing the limiting of the closing interlocking plate.

[0073] The interlocking operating mechanism includes an operating shaft 225, which is directly used to control the operating mechanism in the phase pole, and an interlocking arm 314 is arranged on the operating shaft 225, and the interlocking arm 314 is connected to the interlocking rod 32, and is used to drive the interlocking rod 32 to move, and a trip roller 315 is arranged on the operating shaft, and a trip cam 312 is arranged correspondingly at the upper end of the trip roller 315. When the trip cam 312 rotates, it will touch the trip roller, drive the operating shaft to rotate, so that the interlocking rod retracts and releases the limit on the closing interlocking plate, that is, after automatic opening, the locking of the interlocking rod is released, and the disconnector can be manually opened and closed to avoid human operation in the closed state.

[0074] At the same time, the interlocking operating mechanism is also provided with an auxiliary switch, which is linked to the operating shaft through a connecting rod mechanism. The connecting rod mechanism includes an auxiliary switch crank arm linked to the auxiliary switch. The auxiliary switch crank arm is linked to the crank arm arranged on the operating shaft through a connecting rod. The extension and retraction operations of the interlocking rod can also be realized by using the auxiliary switch.

[0075] The interlocking operating mechanism is also provided with an interlocking plate 313, which is linked with the operating shaft through a buffer crank arm, and has a first state in which the interlocking plate forms a limit fit with the lock plate on the surface of the box when the interlocking rod is extended, and a second state in which the limit fit with the lock plate on the surface of the box is released when the interlocking rod is retracted. The interlocking plate is driven by the operating shaft, and a slide groove is provided on it, and a positioning pin is provided in the slide groove, so as to determine the movement trajectory of the interlocking plate. When the interlocking rod is extended to form a limit fit with the closing interlocking plate, the end of the interlocking plate is placed on the upper end of the lock plate, pressing the lock plate to prevent it from opening upward from the outside, so as to avoid someone opening the lock plate manually in the closing state, and only when the interlocking rod is retracted to release the limit state of the closing interlocking plate, the interlocking plate is driven to move inward, and is no longer located in the movement direction of the lock plate, so that the lock plate can be opened for manual closing or opening or grounding operations.

[0076] The circuit breaker body includes three combined solid-sealed poles, and the insulating pull rod of the combined solid-sealed poles is linked with the transmission mechanism. The combined solid-sealed pole includes an insulating sleeve 41, one end of the insulating sleeve 41 is closed, and the other end is open. A vacuum tube 49 is arranged in the closed end of the insulating sleeve, one end of the vacuum tube 49 is connected to the conductive block 48, and the other end is connected to the pull rod 411. The vacuum tube 49 is connected to the pull rod 411 through a connecting rod 412, and the insulating sleeve 41 is provided with a lead-out port at the connecting rod 412. The connecting rod sleeve is provided with a conductive belt 410, which is a bent section, and one end of which is linked by the connecting rod, that is, the conductive belt can be driven by the pull rod. To achieve separation / closing with the vacuum tube, the conductive belt 410 extends to the outside of the insulating sleeve through the lead-out port, and the conductive belt located on the outside of the insulating sleeve is electrically connected to the busbar. A grounding terminal 416 is provided at the end of the busbar. A fixed seat 417 is provided at the upper end of the closed end of the insulating sleeve 41, and an isolation arm 43 is hingedly provided on the fixed seat 417. The conductive block 48 is fixedly connected to the bottom end of the isolation blade 47. One end of the isolation arm 43 is hinged to the middle part of the isolation blade 47 through the first isolation pull rod 46, and the other end of the isolation arm 43 is connected to the isolation operating shaft through the second isolation pull rod 42. An isolation static contact 45 is provided on the top of the fixed seat.

[0077] The cross section of the fixing seat 417 is trapezoidal, and the middle of the fixing seat is hollowed out to form an isolation arm accommodation space, and an isolation static contact fixing groove is provided at the upper end of the fixing seat. The static contact fixing groove is slightly concave, so that the isolation static contact can be better fixed on the fixing seat.

[0078] The first isolation rod 46 is provided with a plurality of sheds in the circumferential direction. The side wall of the fixing seat is provided with a plurality of sheds. The design of the sheds can extend the creepage distance.

[0079] The isolation arm is in a 7-shape, with the corner being hinged at a fixed seat, with the longer end 413 being hinged to the first isolation rod, and the shorter end 414 being hinged to the second isolation rod.

[0080] A fixing column 44 is provided on the side of the insulating sleeve opposite to the busbar, and a U-shaped groove for accommodating the second isolation rod 42 is provided on the fixing column, that is, the second isolation rod can be arranged in a direction parallel to the insulating sleeve, thereby reducing its installation space.

[0081] The busbar outer shell is provided with an insulating shell 48, and a plurality of sheds are provided around the insulating shell.

[0082] The front end of the insulating shell is provided with a receiving groove for receiving the conductive belt, so that the conductive belt can be better contacted with the busbar, and the insulating shell can cover the contact point between the conductive belt and the busbar, and the two can be connected by bolts.

[0083] The conductive block is provided with a limiting groove 415 which cooperates with the insulating sleeve to prevent rotation. The limiting groove 415 and the structure in the insulating sleeve can prevent the conductive block from rotating in the insulating sleeve and can serve as an indicator during installation.

[0084] The embodiments should not be regarded as limiting the present invention, and any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A multifunctional combined vacuum circuit breaker, characterized in that: It includes a circuit breaker body and an operating mechanism, wherein the operating mechanism includes an operating box, an operating panel is arranged on the operating box, a circuit breaker operating system is arranged in the operating box, an isolating shaft and a grounding shaft are arranged at the bottom of the operating box, an operating hole spring sleeve is sleeved on the isolating shaft and the grounding shaft, a grounding interlocking arm is arranged on the grounding shaft, the grounding interlocking arm is linked with a grounding interlocking plate I, a transverse groove is arranged on the operating hole spring sleeve, the grounding interlocking plate I has a first state of constituting a limiting match with the transverse groove when the grounding shaft is grounded and closed, and a second state of releasing the limiting match with the transverse groove when the grounding shaft is grounded and opened, a closing interlocking plate I that can move up and down is arranged on the moving route of the grounding interlocking plate I, a limiting pin is arranged at the top of the closing interlocking plate I, the circuit breaker operating system is provided with a locking mechanism, the locking mechanism includes a locking member, a limiting slot matched with the limiting pin is arranged at the lower end of the locking member, the closing interlocking plate I has a first state of constituting a limiting match with the locking member when the grounding shaft is grounded and closed, and a second state of releasing the limiting match with the locking member when the grounding shaft is grounded and opened.

2. A multifunctional combined vacuum circuit breaker according to claim 1, characterized in that: A circular hole is arranged on the operating hole spring sleeve corresponding to the grounding shaft, a slidable locking pin is arranged in the circular hole, and an unlocking mechanism for controlling the movement of the locking pin is arranged at the end of the locking pin.

3. A multifunctional combined vacuum circuit breaker according to claim 2, characterized in that: The unlocking mechanism comprises a locking bracket hingedly arranged with the side wall of the operation box, and the end of the locking pin is hingedly arranged with the locking bracket.

4. A multifunctional combined vacuum circuit breaker according to claim 1, characterized in that: The circuit breaker operating system includes a main frame arranged in the operating box, which includes an energy storage transmission mechanism, a closing mechanism, an opening mechanism and a transmission mechanism arranged in the main frame. The main frame is composed of a first side plate and a second side plate. The energy storage transmission mechanism includes an energy storage motor arranged on the first side plate, a gear transmission system linked with the energy storage motor, and an energy storage shaft system linked with the gear transmission system. The energy storage shaft system includes an energy storage shaft linked with the gear transmission system, a closing crank arm and an opening cam. The closing crank arm is provided with a first spring hanging plate and a second spring hanging plate constituting a sliding match. At least one energy storage spring is hung between the first spring hanging plate and the second spring hanging plate, a closing retainer is provided on the opening cam, the closing mechanism includes a closing control mechanism and a closing retaining latch assembly, the opening mechanism includes an opening control mechanism and an opening retaining latch assembly, one end of the closing retaining latch is contacted with the top block of the closing control mechanism, and the other end is limitedly matched with the operating shaft of the transmission mechanism, one end of the opening retaining latch assembly is contacted with the top block of the opening control mechanism, and the other end is contacted with the closing retainer, and the closing retaining latch assembly and the opening retaining latch assembly are coaxially arranged.

5. A multifunctional combined vacuum circuit breaker according to claim 4, characterized in that: An electromagnetic locking mechanism is provided on the main frame, and the electromagnetic locking mechanism includes an electromagnetic locking coil and a locking part. The electromagnetic locking coil cooperates with the locking pin shaft. One end of the locking part is hinged to the opening switch retaining latch assembly, and the other end of the locking part is provided with a clamping portion adapted to the locking pin shaft. The locking part is provided with a locking slide groove, and forms a sliding cooperation with the locking positioning pin arranged on the main frame.

6. A multifunctional combined vacuum circuit breaker according to claim 1, characterized in that: The isolating shaft is connected to the isolating switch through an isolating operating mechanism, the grounding shaft is connected to the grounding switch through a grounding operating mechanism, the isolating shaft sleeve is provided with a closing interlocking plate which cooperates with it in linkage, the grounding shaft is sleeved with a grounding interlocking plate which cooperates with it in linkage, the lower end of the closing interlocking plate is provided with a first latch part, the upper end of the grounding interlocking plate is provided with a second latch part, a locking roller is provided between the first latch part and the second latch part, the locking roller has a first state in which it cooperates with the grounding interlocking plate in a limiting manner when the first latch part is pressed, and a second state in which it cooperates with the closing interlocking plate in a limiting manner when the second latch part is pressed.

7. A multifunctional combined vacuum circuit breaker according to claim 6, characterized in that: The upper end of the closing interlocking plate is provided with an interlocking mechanism linked with the circuit breaker operating mechanism.

8. A multifunctional combined vacuum circuit breaker according to claim 6, characterized in that: Both sides of the upper end of the closing interlocking plate are provided with interlocking grooves which form a limiting match with the interlocking mechanism, and the two interlocking grooves respectively form a limiting match with the interlocking mechanism when closing and opening the switch.

9. A multifunctional combined vacuum circuit breaker according to claim 7, characterized in that: The interlocking mechanism comprises an interlocking rod and an interlocking operating mechanism cooperating with the interlocking rod. The interlocking rod is driven by the interlocking operating mechanism to have a first state of being limited with the closing interlocking plate and a second state of being released from being limited with the closing interlocking plate.

10. A multifunctional combined vacuum circuit breaker according to claim 9, characterized in that: The interlocking operating mechanism comprises an operating shaft, an interlocking crank arm linked with the operating shaft, a gate-opening roller linked with the operating shaft, and a gate-opening cam linked with the gate-opening roller. The interlocking crank arm is linked with a locking rod.

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