Outdoor vacuum circuit breaker

Abstract

The present invention discloses an outdoor vacuum circuit breaker, comprising a mechanism box and a sealed pole, wherein an isolation operating mechanism and a circuit breaker operating mechanism are installed in the mechanism box; the isolation operating mechanism and the circuit breaker operating mechanism are interlocked through a first interlocking mechanism and a second interlocking mechanism, and when the vacuum circuit breaker is in a closed state, the circuit breaker operating mechanism locks the isolation operating mechanism through the first interlocking mechanism, and at this time the second interlocking mechanism is in an unlocked state, so that the circuit breaker operating mechanism is in an operable state and the isolation operating mechanism is in an inoperable state; when the vacuum circuit breaker is in an open state, the isolation operating mechanism locks the circuit breaker operating mechanism through the second interlocking mechanism, and at this time the first interlocking mechanism is in an unlocked state, so that the isolation operating mechanism is in an operable state and the circuit breaker operating mechanism is in an inoperable state. The outdoor vacuum circuit breaker in the present invention has a reasonable structural design, and the vacuum circuit breaker can only be operated in a set sequence during the opening and closing operations, which can effectively avoid the occurrence of misoperation.

Description

Technical Field

[0001] The invention relates to an outdoor vacuum circuit breaker and belongs to the field of high-voltage vacuum circuit breaker structure design. Background Art

[0002] Outdoor vacuum circuit breakers occupy an important position in power transmission and distribution lines. They usually include two major parts: circuit breakers and disconnectors. The core of the circuit breaker is the vacuum interrupter, which has static contacts and moving contacts that control the on and off of the circuit. The circuit breaker (actually the vacuum interrupter) is controlled by the circuit breaker operating mechanism; the function of the disconnector is to establish a reliable insulation gap and separate the line with an obvious disconnection point to ensure the safety of operators and equipment. The disconnector is controlled by the isolation operating mechanism. When the outdoor vacuum circuit breaker is in the closed state, the circuit breaker (i.e., the vacuum interrupter) and the disconnector are both in the closed state. When the vacuum circuit breaker is in the open state, the circuit breaker and the disconnector are both in the open state. During the normal operation of the vacuum circuit breaker (i.e., the vacuum circuit breaker is in the closed state), when the power supply needs to be cut off, the circuit breaker must be cut off first and then the disconnector. When the power supply is turned on, the disconnector must be turned on first and then the circuit breaker. If the operation is performed in the wrong order, it will cause serious losses and damage to the power system. Summary of the invention

[0003] In this regard, the present invention aims to provide an outdoor vacuum circuit breaker with a reasonable structural design. By arranging a first interlocking mechanism and a second interlocking mechanism between the circuit breaker operating mechanism and the isolation operating mechanism to achieve linkage interlocking, the vacuum circuit breaker can only be operated in a set sequence during opening and closing operations, thereby effectively avoiding the occurrence of misoperation.

[0004] The technical solution for achieving the purpose of the present invention is:

[0005] An outdoor vacuum circuit breaker comprises a mechanism box and a sealed pole mounted on the upper part of the mechanism box, wherein the sealed pole is provided with an inlet terminal and an outlet terminal, a vacuum interrupter and an isolating switch are mounted in the sealed pole, and an isolating operating mechanism for controlling the opening and closing of the isolating switch and a circuit breaker operating mechanism for controlling the opening and closing of the vacuum interrupter are mounted in the mechanism box; the isolating operating mechanism and the circuit breaker operating mechanism are interlocked through a first interlocking mechanism and a second interlocking mechanism, when the vacuum circuit breaker is in a closed state, the circuit breaker operating mechanism locks the isolating operating mechanism through the first interlocking mechanism, and at this time the second interlocking mechanism is in an unlocked state, so that the circuit breaker operating mechanism is in an operable state and the isolating operating mechanism is in an inoperable state; when the vacuum circuit breaker is in an open state, the isolating operating mechanism locks the circuit breaker operating mechanism through the second interlocking mechanism, and at this time the first interlocking mechanism is in an unlocked state, so that the isolating operating mechanism is in an operable state and the circuit breaker operating mechanism is in an inoperable state;

[0006] The second interlocking mechanism includes a sliding plate movably arranged in the mechanism box, a locking assembly for locking and unlocking the sliding plate, and a second spring for providing elastic force to the sliding plate. The sliding plate is provided with a pushing portion. The locking assembly is linked to the isolation operating mechanism. When the isolation operating mechanism is in a closed state, the locking assembly is used to unlock the sliding plate. When the circuit breaker operating mechanism is closed, the linkage member linked to the linkage generates a thrust to the pushing portion so that the sliding plate overcomes the elastic force of the second spring and displaces.

[0007] In the above technical solution, the locking assembly includes a driving inclined plane arranged on a driving crank arm in the isolation operating mechanism, a locking rod movable between the circuit breaker operating mechanism and the isolation operating mechanism, and a third spring providing the locking rod with a tendency to move toward the isolation operating mechanism. The end of the locking rod close to the sliding plate is provided with a limiting end with an increased outer diameter. Under the elastic force of the third spring, the end of the locking rod close to the driving inclined plane abuts against the driving inclined plane. The sliding plate has a strip sliding hole arranged along its movable direction, and a positioning hole suitable for cooperating with the limiting end is connected to one end of the strip sliding hole. When the limiting end cooperates with the positioning hole, the sliding plate is locked, and when the limiting end is separated from the positioning hole, the sliding plate is unlocked.

[0008] In the above technical solution, the sliding plate is provided with a guide sliding hole arranged along its movable direction, and the positioning bolt passes through the guide sliding hole and is matched and connected with the fixing seat on the circuit breaker operating mechanism.

[0009] In the above technical solution, the disconnector is arranged in the vertical chamber on the sealed pole, and includes an upper conductive seat and a lower conductive seat fixed at an upper and lower interval, and a conductive contact arm that can move up and down and is always connected to the lower conductive seat, one of the upper conductive seat and the lower conductive seat is connected to the incoming line end, and the other is electrically connected to the static end of the vacuum interrupter through a conductive plate, the moving end of the vacuum interrupter is electrically connected to the outgoing line end, and the moving end of the vacuum interrupter and the lower end of the conductive contact arm are respectively connected through an insulating pull rod. The circuit breaker operating mechanism and the isolation operating mechanism; an insulating rubber sleeve is fixed between the upper conductive seat and the lower conductive seat in the sealed pole, the outer periphery of the insulating rubber sleeve is tightly connected to the inner wall of the vertical chamber, a through hole is provided in the center of the insulating rubber sleeve for the conductive contact arm to pass through, a plurality of circumferentially distributed fan-shaped covers are integrally formed at the through hole at the upper end of the insulating rubber sleeve, the plurality of fan-shaped covers are spliced ​​together to close the through hole under normal conditions, and the upper end of the conductive contact arm is lower than the fan-shaped covers when it moves to the lowest position.

[0010] In the above technical solution, a rubber pad is tightly arranged between the bottom end of the sealed pole and the mechanism box, and the rubber pad has an annular folded portion extending into the vertical chamber, and the inner edge of the annular folded portion is tightly connected to the insulating pull rod.

[0011] In the above technical solution, a conductive rod is provided at the outlet end of the sealed pole;

[0012] The transformer assembly is detachably mounted on the outside of the sealed pole, and the transformer assembly includes a cast shell with a sleeve hole, a shielding sleeve fixed in the sleeve hole, and a current transformer and a voltage sensor arranged in the cast shell. The transformer assembly is tightly connected to the conductive rod through the shielding sleeve and is limited by a limiting component. The current transformer surrounds the shielding sleeve. The output wire of the current transformer and the output wire of the voltage sensor extend from the cast shell and are introduced into the mechanism box to be electrically connected to the controller, and the input wire of the voltage sensor is electrically connected to the conductive rod.

[0013] In the above technical solution, a hollow connecting pipe is fixed at the bottom wire outlet of the casting shell, the bottom end of the connecting pipe is connected to the mechanism box, and the output wire extends from the casting shell and is introduced into the mechanism box through the connecting pipe.

[0014] In the above technical solution, the connecting tube is L-shaped, and a limit stop and a threaded connection portion are provided at its bottom end. A mounting hole is provided on the side wall of the mechanism box. The threaded connection portion extends into the mechanism box through the mounting hole and is connected to the locking nut. A sealing ring is pressed between the limit stop and the outer wall of the mechanism box.

[0015] The present invention has positive effects: the structure of the outdoor vacuum circuit breaker of the present invention is optimized and designed, and the linkage interlocking between the two operating mechanisms is realized by arranging the first interlocking mechanism and the second interlocking mechanism between the isolation operating mechanism and the circuit breaker operating mechanism. During the operation, when the vacuum circuit breaker is in the closed state, the isolation operating mechanism is in a locked and inoperable state, and the circuit breaker operating mechanism is in an unlocked and operable state. When controlling the opening of the vacuum circuit breaker, the circuit breaker (vacuum interrupter) can only be opened by operating the circuit breaker operating mechanism. During the opening process, the circuit breaker operating mechanism controls the isolation operating mechanism through the first interlocking mechanism. Unlock, and then operate the isolating operating mechanism to control the isolating switch to open; when the vacuum circuit breaker is in the open state, the isolating operating mechanism is in an unlocked and operable state, and the circuit breaker operating mechanism is in a locked and inoperable state. At this time, when performing the vacuum circuit breaker closing operation, you can only operate the isolating operating mechanism to close the isolating switch first. During the closing process, the isolating operating mechanism releases the lock of the circuit breaker operating mechanism through the second interlocking mechanism, and then the circuit breaker operating mechanism can be operated to control the circuit breaker to close. In this way, the operation can be performed in the correct order set to avoid the occurrence of misoperation, further protect the power system, and improve the safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an outdoor vacuum circuit breaker in the present invention;

[0017] Figure 2 for Figure 1 A schematic diagram of the structure of an outdoor vacuum circuit breaker without a mechanism box is shown;

[0018] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0019] Figure 4 It is a structural schematic diagram of the first interlocking mechanism in the present invention;

[0020] Figure 5 To observe from another angle Figure 2 The structural schematic diagram of the outdoor vacuum circuit breaker is shown;

[0021] Figure 6 for Figure 5 A partial enlarged view of point B in the middle;

[0022] Figure 7 It is a structural schematic diagram of the second interlocking mechanism in the present invention;

[0023] Figure 8 A cross-sectional view of an outdoor vacuum circuit breaker in the present invention;

[0024] Fig. 9 for Figure 8A partial enlarged view of point C in the middle.

[0025] The reference numerals shown in the figure are: 1, mechanism box; 11, isolation operating mechanism; 111, driving crank arm; 112, driving inclined plane; 12, circuit breaker operating mechanism; 121, driving main shaft; 122, fixed seat; 131, interlocking shaft; 132, first connecting plate; 133, second connecting plate; 134, driving shaft; 135, connecting shaft; 136, connecting groove; 14, moving locking pin; 141, strip hole; 15, locking plate; 151, locking hole; 16, first spring; 17, second interlocking mechanism; 171, sliding plate; 172, pushing part; 173, strip sliding hole; 174, positioning hole; 175, guide sliding hole; 176, second spring; 177, locking rod; 178, third spring; 179, limit 1. Terminal; 2. Limiting frame; 3. Limiting perforation; 4. Sealed pole; 5. Incoming terminal; 6. Conductive rod; 7. Outgoing terminal; 8. Vacuum interrupter; 9. Disconnector; 10. Upper conductive seat; 11. Lower conductive seat; 12. Conductive contact arm; 13. Conductive plate; 14. Insulating rod; 15. Insulating rubber sleeve; 16. Sector-shaped cover; 17. Rubber pad; 18. Pleated part; 19. Transformer assembly; 20. Casting shell; 21. Shielding sleeve; 22. Voltage sensor; 23. Input wire; 24. Connecting pipe; 25. Limiting stop; 26. Screw connection; 27. Locking nut; 28. Sealing ring; 29. ​​Zero-sequence current transformer; 30. Phase protection current transformer. DETAILED DESCRIPTION

[0026] The specific structure of the outdoor vacuum circuit breaker in the present invention is described below in conjunction with the accompanying drawings:

[0027] An outdoor vacuum circuit breaker, such as Figures 1 to 7As shown, it comprises a mechanism box 1 and a sealed pole 2 mounted on the upper part of the mechanism box 1, the sealed pole 2 is provided with an inlet terminal 21 and an outlet terminal 22, a vacuum interrupter 23 and a disconnector 24 are mounted in the sealed pole 2, and an isolation operating mechanism 11 for controlling the opening and closing of the disconnector 24 and a circuit breaker operating mechanism 12 for controlling the opening and closing of the vacuum interrupter 23 are mounted in the mechanism box 1; the isolation operating mechanism 11 and the circuit breaker operating mechanism 12 are interlocked through a first interlocking mechanism 10 and a second interlocking mechanism 17, and when the vacuum circuit breaker is in the closed state, the circuit breaker operating mechanism 1 The isolation operating mechanism 11 is locked by the first interlocking mechanism 10, and the second interlocking mechanism 17 is in the unlocked state, so that the circuit breaker operating mechanism 12 is in the operable state, and the isolation operating mechanism 11 is in the inoperable state; when the vacuum circuit breaker is in the open state, the isolation operating mechanism 11 locks the circuit breaker operating mechanism 12 by the second interlocking mechanism 17, and the first interlocking mechanism 10 is in the unlocked state, so that the isolation operating mechanism 11 is in the operable state, and the circuit breaker operating mechanism 12 is in the inoperable state; the solution of this embodiment is through the first The interlocking mechanism 10 and the second interlocking mechanism 17 are provided to realize the linkage interlocking between the isolation operating mechanism 11 and the circuit breaker operating mechanism 12. During the operation, when the vacuum circuit breaker is in the closed state, the isolation operating mechanism 11 is in a locked and inoperable state, and the circuit breaker operating mechanism 12 is in an unlocked and operable state. When controlling the vacuum circuit breaker to open, the circuit breaker (vacuum interrupter) can only be opened by operating the circuit breaker operating mechanism 12. During the opening process, the circuit breaker operating mechanism 12 unlocks the isolation operating mechanism 11 through the first interlocking mechanism 10, and then operates the isolation operating mechanism 11 to control the disconnector. 24 is open; when the vacuum circuit breaker is in the open state, the isolation operating mechanism 11 is in an unlocked and operable state, and the circuit breaker operating mechanism 12 is in a locked and inoperable state. At this time, when the vacuum circuit breaker is closed, the isolation operating mechanism 11 can only be operated to close the disconnector 24 first. During the closing process, the isolation operating mechanism 11 releases the lock of the circuit breaker operating mechanism 12 through the second interlocking mechanism, and then the circuit breaker operating mechanism 12 can be operated to control the circuit breaker to close. In this way, the operation can be performed in the correct order set, avoiding the occurrence of misoperation, further protecting the power system, and improving the safety performance.

[0028] In this embodiment, further embodiments are as follows: Figures 2 to 4As shown, the first interlocking mechanism 10 includes a movable locking pin 14 linked to the circuit breaker operating mechanism 12 through a transmission assembly and a locking plate 15 linked to the isolation operating mechanism 11. When the circuit breaker operating mechanism 12 is actuated, the movable locking pin 14 is driven by the transmission assembly to move and form a locking fit or unlocking fit with the locking plate 15, and when the circuit breaker operating mechanism 12 is in a closed state, the movable locking pin 14 and the locking plate 15 are locked and matched to lock the isolation operating mechanism 11 in the closed state, and in this state, the isolation operating mechanism 11 cannot be directly operated to open the circuit; further, in order to enhance the locking and matching effect of the locking plate 15 and the movable locking pin 14, the locking plate 15 in this embodiment is provided with a locking hole 151 suitable for the insertion of the movable locking pin 14, and the reliability of the locking can be ensured by inserting the movable locking pin 14 into the locking hole 151 on the locking plate 15, and the structure is simple and feasible.

[0029] In a further implementation scheme in this embodiment, the transmission assembly includes an interlocking shaft 131 rotatably arranged in the mechanism box 1, a first connecting plate 132 and a second connecting plate 133 respectively fixed at both ends of the interlocking shaft 131, and a driving shaft 134 connected to the driving main shaft 121 in the circuit breaker operating mechanism 12, the first connecting plate 132 is provided with a connecting groove 136 which is matched and connected with the driving shaft 134, the second connecting plate 133 is connected to the movable lock pin 14 through a connecting shaft 135, when the circuit breaker operating mechanism 12 is actuated, the driving main shaft 121 is actuated and the interlocking shaft 131 is driven to rotate through the cooperation between the driving shaft 134 and the connecting groove 136, and then the movable lock pin 14 is driven to move through the second connecting plate 133, and a limiting frame 18 on which the movable lock pin 14 is fixed with a limited position is fixed in the mechanism box 1 , the limit frame 18 is provided with a limit hole 181 for the movable lock pin 14 to pass through; with the above structure, when the isolation operating mechanism 11 is in the closed state and the circuit breaker operating mechanism 12 is operated to close, the driving main shaft 121 moves and realizes power transmission through the first connecting plate 132, the interlocking shaft 131, and the second connecting plate 133 to drive the movable lock pin 14 to move and insert into the locking hole 151 on the locking plate 15 to lock the isolation operating mechanism 11. When the column-mounted disconnector is controlled to open, the circuit breaker operating mechanism 12 is controlled to open, and the driving main shaft 121 moves in the reverse direction again and realizes power transmission through the first connecting plate 132, the interlocking shaft 131, and the second connecting plate 133 to drive the movable lock pin 14 to move in the reverse direction and completely disengage from the locking plate 15, thereby releasing the lock of the isolation operating mechanism 11. The circuit breaker operating mechanism 12 used in this embodiment can adopt the spring operating mechanism in the prior art, or can also adopt the permanent magnet operating mechanism.

[0030] As a further improvement scheme in the above embodiment, a first spring 16 is sleeved on the movable lock pin 14, one end of the first spring 16 is connected to the limit frame 18, and the other end is connected to the movable lock pin 14, the first spring 16 provides the movable lock pin 14 with an elastic force to move in the direction away from the locking plate 15; the hole on the movable lock pin 14 that cooperates with the connecting shaft 135 is a strip hole 141, the setting direction of the strip hole 141 is the axial direction of the movable lock pin 14, and the length of the strip hole 141 is less than the moving stroke of the movable lock pin 14; in the present technical scheme, the strip hole 141 is arranged in a manner of cooperating with the connecting shaft 135 to movably connect the movable lock pin 14 with the second connecting plate 133, and the first spring 16 is arranged to provide an elastic force for the movable lock pin 14, thereby generating an elastic buffer when the movable lock pin 14 moves.

[0031] A further implementation scheme of this embodiment is as follows Figures 5 to 7 As shown, the second interlocking mechanism 17 includes a sliding plate 171 movably arranged in the mechanism box 1, a locking assembly for locking and unlocking the sliding plate 171, and a second spring 176 for providing elastic force to the sliding plate 171. The sliding plate 171 has a pushing portion 172. The locking assembly is linked to the isolation operating mechanism 11. When the isolation operating mechanism 11 is in a closed state, the locking assembly is used to unlock the sliding plate 171. When the circuit breaker operating mechanism 12 is closed, the locking assembly is linked to the isolation operating mechanism 11. The linkage member generates a thrust on the pushing portion 172 so that the sliding plate 171 overcomes the elastic force of the second spring 176 and moves, that is, the second spring 176 is compressed when the circuit breaker operating mechanism 12 is in the closed state, and when the circuit breaker operating mechanism 12 is in the open state, the linkage member removes the force on the pushing portion 172, and the sliding plate 171 is reset under the action of the second spring 176; the linkage member is linked with the circuit breaker operating mechanism 12, and the linkage member follows the action when the circuit breaker operating mechanism is actuated. The linkage member in this embodiment is not shown in the figure.

[0032] Furthermore, the locking assembly includes a driving inclined surface 112 arranged on a driving crank arm 111 in the isolation operating mechanism 11, a locking rod 177 movable between the circuit breaker operating mechanism 12 and the isolation operating mechanism 11, and a third spring 178 for providing the locking rod 177 with a tendency to move toward the isolation operating mechanism 11, and an end of the locking rod 177 close to the sliding plate 171 is provided with a limiting end head 179 with an increased outer diameter, and under the elastic force of the third spring 178, an end of the locking rod 177 close to the driving inclined surface 112 abuts against the driving inclined surface 112, and the sliding plate 171 has a strip sliding hole 173 arranged along its movable direction, and a positioning hole 174 suitable for cooperating with the limiting end head 179 is connected to one end of the strip sliding hole 173, and when the limiting end head 179 cooperates with the positioning hole 174, the sliding plate 1 71 is locked, and the sliding plate 171 is unlocked when the limiting end 179 is separated from the positioning hole 174; when the vacuum circuit breaker is in the open state, the limiting end 179 on the locking rod 177 is stuck in the positioning hole 174 to lock the sliding plate 171. At this time, when the circuit breaker operating mechanism 12 is operated, the linkage member abuts against the pushing portion 172 and cannot be closed. Therefore, if the vacuum circuit breaker is to be switched from open to closed, the isolation operating mechanism 12 can only be closed first. During the closing process of the isolation operating mechanism 12, the driving crank arm 111 moves and pushes the locking rod 177 through the driving inclined surface 112 to overcome the elastic force of the third spring 178 and move axially to make the limiting end 179 disengage from the positioning hole 174, thereby unlocking the sliding plate 171. Only then can the circuit breaker operating mechanism be operated to close the circuit to avoid misoperation.

[0033] Furthermore, the sliding plate 171 is provided with a guide sliding hole 175 arranged along its movable direction, and the positioning bolt passes through the guide sliding hole 175 and is connected with the fixed seat 122 on the circuit breaker operating mechanism 12, and the guiding and limiting of the sliding plate 171 in the moving direction is achieved through the cooperation between the guide sliding hole 175 and the positioning bolt.

[0034] As an implementation method of this embodiment, Figure 8As shown, the isolating switch 24 is arranged in the vertical chamber on the sealed pole 2, and includes an upper conductive seat 241 and a lower conductive seat 242 fixed at an upper and lower interval, and a conductive contact arm 243 that can move up and down and is always connected to the lower conductive seat 242. One of the upper conductive seat 241 and the lower conductive seat 242 is connected to the incoming line terminal 21, and the other is electrically connected to the static end of the vacuum arc chamber 23 through a conductive plate 244. The moving end of the vacuum arc chamber 23 is electrically connected to the outgoing line terminal 22, and the moving end of the vacuum arc chamber 23 and the lower end of the conductive contact arm 243 are respectively connected to the circuit breaker operating mechanism 12 and the isolating operating mechanism 11 through an insulating pull rod 245; an insulating rubber sleeve 246 is fixed between the upper conductive seat 241 and the lower conductive seat 242 in the sealed pole 2, and the outer periphery of the insulating rubber sleeve 246 is connected to the inner periphery of the vertical chamber. The insulating rubber sleeve 246 is closely connected to the wall, and a through hole is provided in the center of the insulating rubber sleeve 246 for the conductive contact arm 243 to pass through. A plurality of fan-shaped covers 247 distributed along the circumferential direction are integrally formed at the through hole at the upper end of the insulating rubber sleeve 246. Under normal conditions, the plurality of fan-shaped covers 247 are assembled to close the through hole. When the conductive contact arm 243 moves to the lowest position, its upper end is lower than the fan-shaped covers 247. In this embodiment, an insulating rubber sleeve 246 is arranged between the upper conductive seat 241 and the lower conductive seat 242, and a fan-shaped cover 247 is arranged on the insulating rubber sleeve 246. When the conductive contact arm 243 moves to the lowest position, that is, when the disconnector is in the disconnected state, the fan-shaped covers 247 are assembled to form a barrier between the conductive contact arm 243 and the upper conductive seat 241, and the creepage distance is increased by the arrangement of the insulating rubber sleeve 246, thereby effectively improving the use safety and having a good use effect. In this embodiment, the number of the fan-shaped shielding pieces 247 can be four, five or six. When the conductive contact arm 243 moves upward through the perforation, the fan-shaped shielding piece 247 bends upward and adheres to the side of the conductive contact arm 243. When the conductive contact arm 243 moves downward and exits the perforation, the fan-shaped shielding piece 247 resets downward. The insulating rubber sleeve 246 in this embodiment is made of silicone rubber, which is the preferred material due to its high elasticity, heat resistance and insulation properties.

[0035] As a further improvement, a rubber pad 3 is tightly arranged between the bottom end of the sealed pole 2 and the mechanism box 1, and the rubber pad 3 has an annular folded portion 31 extending into the vertical chamber, and the inner edge of the annular folded portion 31 is tightly connected to the insulating pull rod 245. The setting of the rubber pad 3 plays an isolation role to ensure the sealing of the vertical chamber, and the setting of the annular folded portion 31 can avoid excessive pulling of the rubber pad 3 during the up and down movement of the insulating pull rod 245; further, in order to realize the connection between the annular folded portion 31 and the insulating pull rod 245, in this embodiment, the insulating pull rod 245 has an annular groove tightly sleeved with the inner edge of the annular folded portion 31, and a quick and reliable connection is achieved through the cooperation between the annular folded portion 31 and the annular groove.

[0036] A further implementation scheme of this embodiment is as follows Figure 8 As shown, the outlet end 22 of the sealed pole 2 is provided with a conductive rod 211; the transformer assembly 4 is detachably installed on the outside of the sealed pole 2, and the transformer assembly 4 includes a casting shell 41 with a sleeve hole, a shielding sleeve 42 fixed in the sleeve hole, and a current transformer and a voltage sensor 43 arranged in the casting shell 41. The transformer assembly 4 is tightly connected to the conductive rod 211 through the shielding sleeve 42 and is limited by a limiting component. The current transformer surrounds the shielding sleeve 42, and the output wire of the current transformer is connected to the output wire of the voltage sensor 43. The wire extends out from the cast shell 41 and is introduced into the mechanism box 1 and electrically connected to the controller, and the input wire 431 of the voltage sensor 43 is electrically connected to the conductive rod 211; by optimizing the design of the transformer assembly 4, the current transformer and the voltage sensor 43 are integrated in the cast shell 41. During installation, the transformer assembly 4 is mounted as a whole on the outside of the sealed pole 2 and is installed on the conductive rod 211 through a limiting component to ensure the stability of the installation. The structure is compact and reasonable, and the current transformer and the voltage sensor 43 can be replaced when damaged. It is easy to disassemble and assemble, and has good practicality.

[0037] For further information, see Figure 8 and Fig. 9As shown, a hollow connecting tube 44 is fixed at the bottom outlet of the casting shell 41, and the bottom end of the connecting tube 44 is connected to the mechanism box 1, and the output wire extends from the casting shell 41 and is introduced into the mechanism box 1 through the connecting tube 44; the connecting tube 44 is L-shaped, and a limit stop 441 and a screw connection 442 are provided at its bottom end, and a mounting hole is provided on the side wall of the mechanism box 1, and the screw connection 442 extends from the mounting hole into the mechanism box 1 and is connected with a locking nut 443, and a sealing ring 444 is pressed between the limit stop 441 and the outer wall of the mechanism box 1; in this embodiment, the above-mentioned hollow connecting tube 44 can enhance the stability of the installation of the mutual inductor combination 6, and the output wire is arranged in the connecting tube 44 to avoid the adverse effects caused by the exposure of the output wire, further improving the convenience of installation, and the sealing ring 444 is provided to play a sealing role to prevent dust and rainwater from entering the mechanism box 1 through the mounting hole. In this embodiment, the current transformer includes a zero-sequence current transformer 45 and a phase protection current transformer 46 .

[0038] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the essential spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. An outdoor vacuum circuit breaker, comprising a mechanism box (1) and a sealed pole (2) mounted on the upper part of the mechanism box (1), the sealed pole (2) being provided with an inlet terminal (21) and an outlet terminal (22), the sealed pole (2) being provided with a vacuum interrupter (23) and an isolating switch (24), the mechanism box (1) being provided with an isolating operating mechanism (11) for controlling the opening and closing of the isolating switch (24) and a circuit breaker operating mechanism (12) for controlling the opening and closing of the vacuum interrupter (23); characterized in that: The isolation operating mechanism (11) and the circuit breaker operating mechanism (12) are interlocked through a first interlocking mechanism (10) and a second interlocking mechanism (17); when the vacuum circuit breaker is in a closed state, the circuit breaker operating mechanism (12) locks the isolation operating mechanism (11) through the first interlocking mechanism (10), and at this time the second interlocking mechanism (17) is in an unlocked state, so that the circuit breaker operating mechanism (12) is in an operable state and the isolation operating mechanism (11) is in an inoperable state; when the vacuum circuit breaker is in an open state, the isolation operating mechanism (11) locks the circuit breaker operating mechanism (12) through the second interlocking mechanism (17), and at this time the first interlocking mechanism (10) is in an unlocked state, so that the isolation operating mechanism (11) is in an operable state and the circuit breaker operating mechanism (12) is in an inoperable state; The second interlocking mechanism (17) comprises a sliding plate (171) movably arranged in the mechanism box (1), a locking assembly for locking and unlocking the sliding plate (171), and a second spring (176) for providing elastic force to the sliding plate (171); the sliding plate (171) has a pushing portion (172); the locking assembly is linked to the isolation operating mechanism (11); when the isolation operating mechanism (11) is in a closed state, the locking assembly releases the locking of the sliding plate (171); when the circuit breaker operating mechanism (12) is closed, a linkage member linked to the sliding plate (171) generates a thrust on the pushing portion (172) so that the sliding plate (171) overcomes the elastic force of the second spring (176) and moves; The locking assembly comprises a driving inclined surface (112) arranged on a driving crank arm (111) in the isolation operating mechanism (11), a locking rod (177) movable between the circuit breaker operating mechanism (12) and the isolation operating mechanism (11), and a third spring (178) providing the locking rod (177) with a tendency to move toward the isolation operating mechanism (11); an end of the locking rod (177) close to the sliding plate (171) is provided with a limiting end (179) with an increased outer diameter, and under the elastic force of the third spring (178), the locking rod One end of the sliding plate (177) close to the driving inclined surface (112) abuts against the driving inclined surface (112); the sliding plate (171) has a strip sliding hole (173) arranged along its movable direction; one end of the strip sliding hole (173) is connected to a positioning hole (174) suitable for cooperating with the limiting end (179); when the limiting end (179) cooperates with the positioning hole (174), the sliding plate (171) is locked; when the limiting end (179) is separated from the positioning hole (174), the sliding plate (171) is unlocked; The first interlocking mechanism (10) comprises a movable locking pin (14) linked to the circuit breaker operating mechanism (12) through a transmission assembly and a locking plate (15) linked to the isolation operating mechanism (11); when the circuit breaker operating mechanism (12) is actuated, the movable locking pin (14) is driven by the transmission assembly to move to form a locking fit or release a locking fit with the locking plate (15); and when the circuit breaker operating mechanism (12) is in a closed state, the movable locking pin (14) is locked with the locking plate (15) to lock the isolation operating mechanism (11) in the closed state; The transmission assembly comprises an interlocking shaft (131) rotatably arranged in the mechanism box (1), a first connecting plate (132) and a second connecting plate (133) respectively fixed at two ends of the interlocking shaft (131), and a driving shaft (134) connected to a driving main shaft (121) in the circuit breaker operating mechanism (12), wherein the first connecting plate (132) is provided with a connecting groove (136) which is matched and connected to the driving shaft (134), and the second connecting plate (133) is connected to the movable lock pin (134) via a connecting shaft (135). 14), when the circuit breaker operating mechanism (12) is actuated, the driving main shaft (121) is actuated and the interlocking shaft (131) is driven to rotate through the cooperation between the driving shaft (134) and the connecting groove (136), and then the movable locking pin (14) is driven to move through the second connecting plate (133), and a limiting frame (18) for limiting the installation of the movable locking pin (14) is fixed in the mechanism box (1), and a limiting through hole (181) for the movable locking pin (14) to pass through is provided on the limiting frame (18); The outlet end (22) of the sealed pole (2) is provided with a conductive rod (211).

2. The outdoor vacuum circuit breaker according to claim 1, characterized in that: The sliding plate (171) is provided with a guide sliding hole (175) arranged along its movable direction, and a positioning bolt passes through the guide sliding hole (175) and is matched and connected with a fixing seat (122) on the circuit breaker operating mechanism (12).

3. The outdoor vacuum circuit breaker according to claim 1, characterized in that: The isolating switch (24) is arranged in a vertical chamber on the sealed pole (2), and comprises an upper conductive seat (241) and a lower conductive seat (242) which are fixed at an upper and lower interval, and a conductive contact arm (243) which can move up and down and is always connected to the lower conductive seat (242), one of the upper conductive seat (241) and the lower conductive seat (242) is connected to the incoming line terminal (21), and the other is electrically connected to the static end of the vacuum arc chamber (23) through a conductive plate (244), the moving end of the vacuum arc chamber (23) is electrically connected to the outgoing line terminal (22), and the moving end of the vacuum arc chamber (23) and the lower end of the conductive contact arm (243) are respectively connected to the ingoing line terminal (21) through an insulating pull rod (245). The circuit breaker operating mechanism (12) and the isolation operating mechanism (11); an insulating rubber sleeve (246) is fixed between the upper conductive seat (241) and the lower conductive seat (242) in the sealed pole (2); the outer periphery of the insulating rubber sleeve (246) is tightly connected to the inner wall of the vertical chamber; a through hole for the conductive contact arm (243) to pass through is provided at the center of the insulating rubber sleeve (246); a plurality of circumferentially distributed fan-shaped shields (247) are integrally formed at the through hole at the upper end of the insulating rubber sleeve (246); the plurality of fan-shaped shields (247) are assembled to close the through hole under normal conditions; and the upper end of the conductive contact arm (243) is lower than the fan-shaped shield (247) when it moves to the lowest position.

4. The outdoor vacuum circuit breaker according to claim 3, characterized in that: A rubber pad (3) is tightly arranged between the bottom end of the sealed pole (2) and the mechanism box (1), the rubber pad (3) having an annular folded portion (31) extending into the vertical chamber, the inner edge of the annular folded portion (31) being tightly connected to the insulating pull rod (245).

5. The outdoor vacuum circuit breaker according to claim 1, characterized in that: The transformer assembly (4) is detachably mounted on the outside of the sealed pole (2), the transformer assembly (4) comprising a cast shell (41) provided with a sleeve hole, a shielding sleeve (42) fixed in the sleeve hole, and a current transformer and a voltage sensor (43) arranged in the cast shell (41); the transformer assembly (4) is tightly fitted on the conductive rod (211) through the shielding sleeve (42) and is limited by a limiting component; the current transformer surrounds the shielding sleeve (42); the output wire of the current transformer and the output wire of the voltage sensor (43) extend from the cast shell (41) and are introduced into the mechanism box (1) to be electrically connected to the controller; the input wire (431) of the voltage sensor (43) is electrically connected to the conductive rod (211).

6. The outdoor vacuum circuit breaker according to claim 5, characterized in that: A connecting pipe (44) with a hollow structure is fixed at the bottom wire outlet of the casting shell (41); the bottom end of the connecting pipe (44) is connected to the mechanism box (1); the output wire extends from the casting shell (41) and is introduced into the mechanism box (1) via the connecting pipe (44).

7. The outdoor vacuum circuit breaker according to claim 6, characterized in that: The connecting pipe (44) is L-shaped, and a limit stop (441) and a screw connection portion (442) are provided at its bottom end. A mounting hole is provided on a side wall of the mechanism box (1). The screw connection portion (442) extends from the mounting hole into the mechanism box (1) and is connected to a locking nut (443). A sealing ring (444) is pressed between the limit stop (441) and the outer wall of the mechanism box (1).

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