CN114597091B - Outdoor vacuum circuit breaker - Google Patents
Outdoor vacuum circuit breaker Download PDFInfo
- Publication number
- CN114597091B CN114597091B CN202111444574.4A CN202111444574A CN114597091B CN 114597091 B CN114597091 B CN 114597091B CN 202111444574 A CN202111444574 A CN 202111444574A CN 114597091 B CN114597091 B CN 114597091B
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- Prior art keywords
- circuit breaker
- operating mechanism
- locking
- lock pin
- vacuum circuit
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- 230000007246 mechanism Effects 0.000 claims abstract description 237
- 238000002955 isolation Methods 0.000 claims abstract description 38
- 239000007787 solid Substances 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 229920001971 elastomer Polymers 0.000 claims description 25
- 230000005540 biological transmission Effects 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 125000003003 spiro group Chemical group 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/46—Interlocking mechanisms
- H01H33/52—Interlocking mechanisms for interlocking two or more switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
Abstract
The invention discloses an outdoor vacuum circuit breaker, which comprises a mechanism box and a solid sealing pole, wherein an isolation operating mechanism and a circuit breaker operating mechanism are arranged in the mechanism box; the isolating operation mechanism is interlocked with the circuit breaker operation mechanism through a first interlocking mechanism and a second interlocking mechanism, when the vacuum circuit breaker is in a closing state, the circuit breaker operation mechanism locks the isolating operation mechanism through the first interlocking mechanism, and when the second interlocking mechanism is in an unlocking state, so that the circuit breaker operation mechanism is in an operable state and the isolating operation mechanism is in an inoperable state; when the vacuum circuit breaker is in a breaking state, the isolation operating mechanism locks the circuit breaker operating mechanism through the second interlocking mechanism, and at the moment, the first interlocking mechanism is in an unlocking 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 is reasonable in structural design, and the vacuum circuit breaker can only be operated according to a set sequence during opening and closing operation, so that misoperation can be effectively avoided.
Description
Technical Field
The invention relates to an outdoor vacuum circuit breaker, and belongs to the field of structural design of high-voltage vacuum circuit breakers.
Background
The outdoor vacuum circuit breaker occupies an important position in a power transmission and distribution line, and generally comprises a circuit breaker and a disconnecting switch, wherein the core of the circuit breaker is a vacuum arc-extinguishing chamber, a fixed contact and a moving contact for controlling the on-off of a circuit are arranged in the vacuum arc-extinguishing chamber, and the on-off of the circuit breaker (the vacuum arc-extinguishing chamber is essentially) is controlled by a circuit breaker operating mechanism; the isolating switch has the function of establishing a reliable insulation gap, separating the lines by an obvious breaking point so as to ensure the safety of operators and equipment, and the opening and closing of the isolating switch are controlled by an isolating operation mechanism. The outdoor vacuum circuit breaker is in the state that the circuit breaker (namely the vacuum explosion chamber) and the isolating switch are in the state of being closed when being in the state of being closed, and the vacuum circuit breaker is in the state of being opened when being in the state of being opened, and in the normal working process of the vacuum circuit breaker (namely the vacuum circuit breaker is in the state of being closed), when needing to cut off the power supply, the isolating switch must be cut off firstly and then cut off, and when being cut on, the isolating switch must be cut off firstly and then cut off, and if the vacuum circuit breaker is operated according to the wrong sequence, serious loss and damage can be caused to the power system.
Disclosure of Invention
In this regard, the invention aims to provide an outdoor vacuum circuit breaker with reasonable structural design, and the first interlocking mechanism and the second interlocking mechanism are arranged between the circuit breaker operating mechanism and the isolation operating mechanism to realize linkage interlocking, so that the vacuum circuit breaker can only operate according to a set sequence during opening and closing operation, and the misoperation condition can be effectively avoided.
The technical scheme for realizing the aim of the invention is as follows:
the outdoor vacuum circuit breaker comprises a mechanism box and a solid-sealed polar pole arranged at the upper part of the mechanism box, wherein a wire inlet end and a wire outlet end are arranged on the solid-sealed polar pole, a vacuum arc-extinguishing chamber and a disconnecting switch are arranged in the solid-sealed polar pole, and an isolating operation mechanism for controlling the opening and closing of the disconnecting switch and a circuit breaker operation mechanism for controlling the opening and closing of the vacuum arc-extinguishing chamber are arranged in the mechanism box; the isolating operation mechanism is interlocked with the circuit breaker operation mechanism through a first interlocking mechanism and a second interlocking mechanism in a linkage way, when the vacuum circuit breaker is in a closing state, the circuit breaker operation mechanism locks the isolating operation mechanism through the first interlocking mechanism, and when the isolating operation mechanism is in an unlocking state, the second interlocking mechanism is in an operable state so that the circuit breaker operation mechanism is in an inoperable state; when the vacuum circuit breaker is in a breaking state, the isolating operation mechanism locks the circuit breaker operation mechanism through the second interlocking mechanism, and at the moment, the first interlocking mechanism is in an unlocking state, so that the isolating operation mechanism is in an operable state, and the circuit breaker operation mechanism is in an inoperable state.
According to the technical scheme, the first interlocking mechanism comprises the movable lock pin and the locking piece, wherein the movable lock pin is in linkage connection with the circuit breaker operating mechanism through the transmission assembly, the locking piece is in linkage connection with the isolation operating mechanism, the movable lock pin is driven to move to form locking fit or unlocking fit with the locking piece through the transmission assembly when the circuit breaker operating mechanism acts, and the isolation operating mechanism is locked in a closing state through the locking fit of the movable lock pin and the locking piece when the circuit breaker operating mechanism is in the closing state.
In the technical scheme, the locking piece is provided with a locking hole suitable for the insertion of the movable lock pin.
In the above technical scheme, the transmission assembly includes rotatable set up in interlocking axle in the mechanism case, fix respectively first link plate and second link plate at interlocking axle both ends, with drive spindle connection's drive shaft in the circuit breaker operating device, be equipped with on the first link plate with the spread groove that the drive shaft cooperation is connected, the second link plate pass through the connecting axle with remove the lockpin links to each other, when circuit breaker operating device moves the drive spindle action and pass through the drive shaft with the cooperation of spread groove drives the interlocking axle rotates, and then passes through the second link plate drives remove the lockpin removes, the mechanism incasement is fixed with spacing installation remove the lockpin, be equipped with on the spacing confession remove the spacing perforation that the lockpin passed.
According to the technical scheme, the movable lock pin is sleeved with the first spring, one end of the first spring is connected with the limiting frame, the other end of the first spring is connected with the movable lock pin, and the first spring provides elasticity for the movable lock pin to move in the direction away from the locking piece;
the hole matched with the connecting shaft on the movable lock pin is a strip-shaped hole, the arrangement direction of the strip-shaped hole is the axial direction of the movable lock pin, and the length of the strip-shaped hole is smaller than the movement stroke of the movable lock pin.
In the above technical scheme, the second interlocking mechanism comprises a sliding plate movably arranged in the mechanism box, a locking component used for locking and unlocking the sliding plate and a second spring used for providing elastic force for the sliding plate, wherein the sliding plate is provided with a pushing part, the locking component is connected with the isolation operating mechanism in a linkage manner, the locking of the sliding plate is released through the locking component when the isolation operating mechanism is in a closing state, and a linkage piece linked with the circuit breaker operating mechanism generates thrust to the pushing part when the circuit breaker operating mechanism closes so that the sliding plate overcomes the elastic force of the second spring to displace.
In the above technical scheme, the locking component is including setting up drive inclined plane on the drive crank arm in the isolation operating mechanism, be in circuit breaker operating mechanism with keep apart movable locking lever between the operating mechanism, for the locking lever provides to keep apart the third spring of operating mechanism direction removal trend, the locking lever is close to the one end of sliding plate is equipped with the spacing end of external diameter increase under the elastic force of third spring the locking lever is close to the one end butt of drive inclined plane in on the drive inclined plane, the last bar slide hole that has along its movable direction setting of sliding plate bar slide hole one end intercommunication be provided with be suitable for with spacing end complex locating hole, spacing end with when the locating hole joins in the time of locking the sliding plate, spacing end with when the locating hole separates to the sliding plate unblock.
In the technical scheme, the sliding plate is provided with the guide sliding hole arranged along the movable direction of the sliding plate, and the positioning bolt penetrates through the guide sliding hole to be connected with the fixed seat on the breaker operating mechanism in a matched mode.
In the above technical scheme, the isolating switch is arranged in a vertical cavity on the solid-sealed polar pole, and comprises an upper conductive seat, a lower conductive seat and a conductive contact arm, wherein the upper conductive seat and the lower conductive seat are fixed at intervals, the conductive contact arm can move up and down and is always connected with the lower conductive seat, one of the upper conductive seat and the lower conductive seat is connected with the wire inlet end, the other conductive seat is electrically connected with the static end of the vacuum arc-extinguishing chamber through a conductive plate, the movable end of the vacuum arc-extinguishing chamber is electrically connected with the wire outlet end, and the movable end of the vacuum arc-extinguishing chamber and the lower end of the conductive contact arm are respectively connected with the circuit breaker operating mechanism and the isolation operating mechanism through insulating pull rods; the solid sealed pole is characterized in that an insulating rubber sleeve is fixed between the upper conductive seat and the lower conductive seat in the solid sealed pole, the periphery of the insulating rubber sleeve is tightly connected with the inner wall of the vertical cavity, a through hole for the conductive contact arm to pass through is formed in the center of the insulating rubber sleeve, a plurality of fan-shaped shielding plates distributed along the circumferential direction are integrally formed at the through hole, the fan-shaped shielding plates are spliced and sealed in the normal state, and the upper end of the conductive contact arm is lower than the fan-shaped shielding plates when the conductive contact arm moves to the lowest position.
In the above technical scheme, the bottom of solid seal utmost point post with compress tightly between the mechanism case and be provided with the rubber pad, the rubber pad has stretches into annular fold portion in the vertical chamber, the inner edge of annular fold portion with insulating pull rod zonulae occludens.
In the technical scheme, the wire outlet end of the solid-sealed polar pole is provided with a conducting rod;
the utility model discloses a solid sealed pole outside demountable installation transformer subassembly, the transformer subassembly is including the pouring casing that is equipped with the trepanning, be fixed in the shielding sleeve in the trepanning, and locate current transformer and voltage sensor in the pouring casing, the transformer subassembly passes through shielding sleeve close-fitting cup joint in on the conducting rod and pass through spacing part and inject, current transformer encircles shielding sleeve, current transformer's output wire with voltage sensor's output wire is stretched out by the pouring casing and is introduced mechanism incasement is connected with the controller electricity, voltage sensor's input wire electricity is connected the conducting rod.
In the technical scheme, a connecting pipe with a hollow structure is fixed at the bottom outlet of the pouring shell, the bottom end of the connecting pipe is connected with the mechanism box, and the output lead extends out of the pouring shell and is led into the mechanism box through the connecting pipe.
In the above technical scheme, the connecting pipe is L shape, and its bottom is equipped with spacing fender platform and spiro union portion, be equipped with the mounting hole on the mechanism case lateral wall, spiro union portion by the mounting hole stretches into in the mechanism case with lock nut cooperation is connected, spacing fender platform with compress tightly between the mechanism case outer wall has the sealing washer.
The invention has the positive effects that: according to the outdoor vacuum circuit breaker structure, through the optimal design, the first interlocking mechanism and the second interlocking mechanism are arranged between the isolation operating mechanism and the circuit breaker operating mechanism, so that linkage interlocking between the two operating mechanisms is realized, in the operation process, when the vacuum circuit breaker is in a closing state, the isolation operating mechanism is in a locked inoperable state, the circuit breaker operating mechanism is in an unlocking operable state, when the vacuum circuit breaker is controlled to break, the circuit breaker (vacuum arc-extinguishing chamber) can only be controlled to break through operating the circuit breaker operating mechanism, the circuit breaker operating mechanism is used for unlocking the isolation operating mechanism in the breaking process, and then the isolation operating mechanism is operated to control the isolating switch to break; when the vacuum circuit breaker is in a breaking state, the isolation operating mechanism is in an unlocking operable state, and the circuit breaker operating mechanism is in a locking inoperable state, at the moment, when the vacuum circuit breaker is in a closing operation, the isolation operating mechanism can only be operated first to enable the isolation switch to be closed first, the isolation operating mechanism can unlock the circuit breaker operating mechanism through the second interlocking mechanism in the closing process, and then the circuit breaker operating mechanism can be operated to control the circuit breaker to be closed, so that the circuit breaker can be operated according to a set correct sequence, the occurrence of misoperation conditions is avoided, the power system is further protected, and the safety use performance is improved.
Drawings
Fig. 1 is a schematic structural view of an outdoor vacuum circuit breaker according to the present invention;
FIG. 2 is a schematic view of the outdoor vacuum interrupter of FIG. 1 with the mechanism housing removed;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is a schematic view of a first interlock mechanism according to the present invention;
fig. 5 is a schematic view illustrating a structure of the outdoor vacuum circuit breaker of fig. 2 viewed from another angle;
FIG. 6 is a partial enlarged view at B in FIG. 5;
FIG. 7 is a schematic view of a second interlock mechanism of the present invention;
fig. 8 is a sectional view of an outdoor vacuum interrupter in accordance with the present invention;
fig. 9 is a partial enlarged view at C in fig. 8.
The reference numerals shown in the figures are: 1. a mechanism box; 11. isolating the operating mechanism; 111. driving the crank arm; 112. a driving inclined plane; 12. a circuit breaker operating mechanism; 121. driving a main shaft; 122. a fixing seat; 131. an interlock shaft; 132. a first link plate; 133. a second coupling plate; 134. a drive shaft; 135. a connecting shaft; 136. a connecting groove; 14. moving the lock pin; 141. a bar-shaped hole; 15. a locking piece; 151. a locking hole; 16. a first spring; 17. a second interlock mechanism; 171. a slip plate; 172. a pushing part; 173. a bar-shaped slide hole; 174. positioning holes; 175. a guide slide hole; 176. a second spring; 177. a locking lever; 178. a third spring; 179. a limiting end head; 18. a limiting frame; 181. limiting perforation; 2. sealing the polar post; 21. a wire inlet end; 211. a conductive rod; 22. a wire outlet end; 23. a vacuum arc extinguishing chamber; 24. an isolating switch; 241. an upper conductive seat; 242. a lower conductive seat; 243. a conductive contact arm; 244. a conductive plate; 245. an insulating pull rod; 246. an insulating rubber sleeve; 247. a fan-shaped mask; 3. a rubber pad; 31. a fold portion; 4. a transformer assembly; 41. casting the shell; 42. a shielding sleeve; 43. a voltage sensor; 431. an input wire; 44. a connecting pipe; 441. a limiting baffle table; 442. a screw connection part; 443. a lock nut; 444. a seal ring; 45. a zero sequence current transformer; 46. the phase protects the current transformer.
Detailed Description
The specific structure of the outdoor vacuum circuit breaker in the invention is described below with reference to the accompanying drawings:
an outdoor vacuum circuit breaker, as shown in fig. 1 to 7, comprises a mechanism box 1 and a solid sealed pole 2 arranged at the upper part of the mechanism box 1, wherein a wire inlet end 21 and a wire outlet end 22 are arranged on the solid sealed pole 2, a vacuum arc-extinguishing chamber 23 and a disconnecting switch 24 are arranged in the solid sealed pole 2, and an isolating operation mechanism 11 for controlling the opening and closing of the disconnecting switch 24 and a circuit breaker operation mechanism 12 for controlling the opening and closing of the vacuum arc-extinguishing chamber 23 are arranged in the mechanism box 1; the isolating operation mechanism 11 is interlocked with the circuit breaker operation mechanism 12 through a first interlocking mechanism 10 and a second interlocking mechanism 17, when the vacuum circuit breaker is in a closing state, the circuit breaker operation mechanism 12 locks the isolating operation mechanism 11 through the first interlocking mechanism 10, and when the second interlocking mechanism 17 is in an unlocking state, so that the circuit breaker operation mechanism 12 is in an operable state, and the isolating operation mechanism 11 is in an inoperable state; in the vacuum circuit breaker, when the vacuum circuit breaker is in a breaking state, the isolating operation mechanism 11 locks the circuit breaker operation mechanism 12 through the second interlocking mechanism 17, and at the moment, the first interlocking mechanism 10 is in an unlocking state, so that the isolating operation mechanism 11 is in an operable state, and the circuit breaker operation mechanism 12 is in an inoperable state; the scheme of the embodiment is that the first interlocking mechanism 10 and the second interlocking mechanism 17 are arranged, so that linkage interlocking between the isolation operating mechanism 11 and the circuit breaker operating mechanism 12 is realized, in the operation process, when the vacuum circuit breaker is in a closing state, the isolation operating mechanism 11 is in a locked and inoperable state, the circuit breaker operating mechanism 12 is in an unlocking and operable state, when the vacuum circuit breaker is controlled to break, the circuit breaker (vacuum arc-extinguishing chamber) can only be controlled to break through operating the circuit breaker operating mechanism 12, the circuit breaker operating mechanism 12 unlocks the isolation operating mechanism 11 through the first interlocking mechanism 10 in the breaking process, and then the isolation operating mechanism 11 is operated to control the isolating switch 24 to break; when the vacuum circuit breaker is in a breaking state, the isolation operating mechanism 11 is in an unlocking operable state, and the circuit breaker operating mechanism 12 is in a locking inoperable state, at the moment, when the vacuum circuit breaker is in a closing operation, the isolation operating mechanism 11 can only be operated first to enable the isolating switch 24 to be closed first, the isolation operating mechanism 11 can unlock the circuit breaker operating mechanism 12 through the second interlocking mechanism in the closing process, and then the circuit breaker operating mechanism 12 can be operated to control the circuit breaker to be closed, so that the operation can be performed according to the set correct sequence, the occurrence of misoperation conditions is avoided, the power system is further protected, and the safety use performance is improved.
In a further embodiment of this embodiment, as shown in fig. 2 to fig. 4, the first interlocking mechanism 10 includes a moving lock pin 14 that is connected with the circuit breaker operating mechanism 12 in a linkage manner through a transmission component and a locking piece 15 that is connected with the isolation operating mechanism 11 in a linkage manner, when the circuit breaker operating mechanism 12 acts, the transmission component drives the moving lock pin 14 to move to form locking fit or unlocking fit with the locking piece 15, and when the circuit breaker operating mechanism 12 is in a closing state, the moving lock pin 14 and the locking piece 15 are in locking fit to lock the isolation operating mechanism 11 in the closing state, and in this state, the isolation operating mechanism 11 cannot be directly operated to perform opening; further, in order to enhance the locking and matching effect of the locking piece 15 and the movable lock pin 14, in this embodiment, a locking hole 151 adapted to the insertion of the movable lock pin 14 is provided on the locking piece 15, and the locking reliability can be ensured by inserting the movable lock pin 14 into the locking hole 151 on the locking piece 15, and the structure is simple and feasible.
In a further embodiment of this embodiment, the transmission assembly includes an interlocking shaft 131 rotatably disposed in the mechanism case 1, a first coupling plate 132 and a second coupling plate 133 respectively fixed at two ends of the interlocking shaft 131, and a driving shaft 134 connected to the driving spindle 121 in the circuit breaker operating mechanism 12, the first coupling plate 132 is provided with a connection slot 136 cooperatively connected to the driving shaft 134, the second coupling plate 133 is connected to the moving lock pin 14 through the connection shaft 135, when the circuit breaker operating mechanism 12 acts, the driving spindle 121 acts and drives the interlocking shaft 131 to rotate through the cooperation of the driving shaft 134 and the connection slot 136, and then drives the moving lock pin 14 to move through the second coupling plate 133, a limiting frame 18 for limiting and mounting the moving lock pin 14 is fixed in the mechanism case 1, and a limiting through hole 181 for the moving lock pin 14 to pass is provided on the limiting frame 18; with the above structure, when the isolating operation mechanism 11 is already in a closing state, and the circuit breaker operation mechanism 12 is operated to close, the driving main shaft 121 acts and drives the movable lock pin 14 to move through the first connecting plate 132, the interlocking shaft 131 and the second connecting plate 133 to be inserted into the locking hole 151 on the locking piece 15 to lock the isolating operation mechanism 11, and when the isolating switch on the column is controlled to open, the circuit breaker operation mechanism 12 is controlled to open, the driving main shaft 121 acts reversely again and drives the movable lock pin 14 to move reversely through the first connecting plate 132, the interlocking shaft 131 and the second connecting plate 133 to be completely separated from the locking piece 15, so that the locking of the isolating operation mechanism 11 is released. The breaker operating mechanism 12 used in the present embodiment may be a spring operating mechanism as in the prior art, or a permanent magnet operating mechanism.
As a further improvement of 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 limiting frame 18, the other end is connected to the movable lock pin 14, and the first spring 16 provides an elastic force for moving the movable lock pin 14 in a direction away from the locking piece 15; the hole on the movable lock pin 14 matched with the connecting shaft 135 is a bar-shaped hole 141, the arrangement direction of the bar-shaped hole 141 is the axial direction of the movable lock pin 14, and the length of the bar-shaped hole 141 is smaller than the movement stroke of the movable lock pin 14; in this embodiment, the bar-shaped hole 141 is provided to be matched 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 provided to provide elastic force for the movable lock pin 14 so as to generate elastic buffering when the movable lock pin 14 moves.
As shown in fig. 5 to 7, the second interlock mechanism 17 includes a sliding plate 171 movably disposed in the mechanism case 1, a locking component 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 part 172, the locking component is in linkage connection with the isolation operating mechanism 11, when the isolation operating mechanism 11 is in a closing state, the locking component releases the locking of the sliding plate 171, a linkage piece linked with the circuit breaker operating mechanism 12 generates pushing force to the pushing part 172 when closing the circuit breaker operating mechanism generates displacement to the sliding plate 171 against the elastic force of the second spring 176, that is, the second spring 176 is compressed when the circuit breaker operating mechanism 12 is in a closing state, the linkage piece removes the acting force to the pushing part 172 when opening the circuit breaker operating mechanism 12, 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 acts, and in this embodiment, the linkage member is not shown in the figure.
Further, the locking assembly includes a driving inclined plane 112 disposed on the driving crank arm 111 in the isolating operation mechanism 11, a locking rod 177 movable between the circuit breaker operation mechanism 12 and the isolating operation mechanism 11, and a third spring 178 providing a moving trend for the locking rod 177 toward the isolating operation mechanism 11, wherein a limit end 179 with an increased outer diameter is disposed at one end of the locking rod 177 adjacent to the sliding plate 171, under the action of the elastic force of the third spring 178, one end of the locking rod 177 adjacent to the driving inclined plane 112 abuts against the driving inclined plane 112, a strip-shaped sliding hole 173 disposed along the movable direction of the sliding plate 171 is disposed at one end of the strip-shaped sliding hole 173, a positioning hole 174 adapted to be matched with the limit end 179 is disposed at one end of the strip-shaped sliding hole 173, the limit end 179 is matched with the positioning hole 174 to lock the sliding plate 171, and the limit end 179 is separated from the positioning hole 174 to unlock the sliding plate 171; when the vacuum circuit breaker is in the opening state, the limiting end 179 on the locking rod 177 is clamped in the positioning hole 174 to lock the sliding plate 171, and at this time, the linkage piece is abutted against the pushing part 172 to be unable to switch on when the circuit breaker operating mechanism 12 is operated, so that if the vacuum circuit breaker is to be switched from opening to closing, the isolating operating mechanism 12 can only be switched on first, and in the switching-on process of the isolating operating mechanism 12, the driving crank arm 111 acts and pushes the locking rod 177 to move along the axial direction against the elastic force of the third spring 178 through the driving inclined plane 112, so that the limiting end 179 is separated from the positioning hole 174 to unlock the sliding plate 171, and at this time, the circuit breaker operating mechanism can be operated to switch on, thereby avoiding misoperation.
Furthermore, the sliding plate 171 is provided with a guiding sliding hole 175 along the movable direction, the positioning bolt passes through the guiding sliding hole 175 to be matched and connected with the fixing seat 122 on the breaker operating mechanism 12, and guiding limiting of the sliding plate 171 in the movable direction is realized through the matching of the guiding sliding hole 175 and the positioning bolt.
As an implementation manner of this embodiment, as shown in fig. 8, the isolating switch 24 is disposed in a vertical cavity on the solid-sealed pole 2, and includes an upper conductive seat 241 and a lower conductive seat 242 that are fixed at intervals up and down, 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 wire inlet end 21, the other is electrically connected to the static end of the vacuum arc extinguishing chamber 23 through a conductive plate 244, the moving end of the vacuum arc extinguishing chamber 23 is electrically connected to the wire outlet end 22, and the moving end of the vacuum arc extinguishing chamber 23 and the lower end of the conductive contact arm 243 are respectively connected to the 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 solid-sealed polar pole 2, the periphery of the insulating rubber sleeve 246 is tightly connected with the inner wall of the vertical cavity, a through hole for the conductive contact arm 243 to pass through is arranged in the center of the insulating rubber sleeve 246, a plurality of fan-shaped shielding plates 247 distributed along the circumferential direction are integrally formed at the through hole at the upper end of the insulating rubber sleeve 246, the plurality of fan-shaped shielding plates 247 are spliced and sealed with the through hole in a normal state, and the upper end of the conductive contact arm 243 is lower than the fan-shaped shielding plates 247 when the conductive contact arm 243 moves to the lowest position; in this embodiment, by disposing the insulating rubber sleeve 246 between the upper conductive seat 241 and the lower conductive seat 242 and disposing the fan-shaped shielding sheet 247 on the insulating rubber sleeve 246, when the conductive contact arm 243 moves to the lowest position, that is, when the isolating switch is in the breaking state, the fan-shaped shielding sheet 247 is spliced between the conductive contact arm 243 and the upper conductive seat 241 to form a barrier, and the creepage distance is increased by disposing the insulating rubber sleeve 246, thereby effectively improving the use safety and having good use effect. The number of the sector-shaped shielding plates 247 in this embodiment may be four, five or six, and the sector-shaped shielding plates 247 are bent upward and attached to the side surfaces of the conductive contact arms 243 when the conductive contact arms 243 move upward through the through holes, and the sector-shaped shielding plates 247 are reset downward when the conductive contact arms 243 move downward out of the through holes. The insulating rubber sleeve 246 in this embodiment is made of silicone rubber, and uses the comprehensive characteristics of high elasticity, heat resistance, insulation and the like of silicone rubber as a preferable material.
As a further improvement, a rubber gasket 3 is tightly pressed between the bottom end of the solid-sealed polar pole 2 and the mechanism box 1, the rubber gasket 3 is provided with an annular fold part 31 extending into the vertical cavity, the inner edge of the annular fold part 31 is tightly connected with the insulating pull rod 245, the sealing performance of the vertical cavity is ensured by the isolation function of the arrangement of the rubber gasket 3, and excessive pulling of the rubber gasket 3 in the up-and-down moving process of the insulating pull rod 245 can be avoided by the arrangement of the annular fold part 31; further, in order to realize connection between the annular corrugated portion 31 and the insulation pull rod 245, in this embodiment, the insulation pull rod 245 is provided with an annular clamping groove tightly sleeved with the inner edge of the annular corrugated portion 31, and quick and reliable connection is realized through cooperation between the annular corrugated portion 31 and the annular clamping groove.
In a further embodiment of the present example, as shown in fig. 8, the wire outlet 22 of the solid sealed pole 2 is provided with a conductive rod 211; the transformer assembly 4 is detachably arranged outside the solid-sealed pole 2, the transformer assembly 4 comprises a pouring 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 pouring shell 41, the transformer assembly 4 is tightly sleeved on the conducting rod 211 through the shielding sleeve 42 and limited by a limiting component, the current transformer surrounds the shielding sleeve 42, an output lead of the current transformer and an output lead of the voltage sensor 43 extend out of the pouring shell 41 and are led into the mechanism box 1 to be electrically connected with a controller, and an input lead 431 of the voltage sensor 43 is electrically connected with the conducting rod 211; through carrying out optimal design to mutual-inductor subassembly 4, with integrated setting of current transformer and voltage sensor 43 in pouring shell 41, with the whole externally-hung suit of mutual-inductor subassembly 4 outside solid seal utmost point post 2 and through spacing installation of spacing part guarantee the steadiness of installation on conducting rod 211 during the installation to compact structure is reasonable, and removable when current transformer and voltage sensor 43 damage, easy dismounting has fine practicality.
Further, referring to fig. 8 and 9, a hollow connecting pipe 44 is fixed at the bottom outlet of the pouring housing 41, the bottom end of the connecting pipe 44 is connected to the mechanism box 1, and the output wire extends out from the pouring housing 41 and is led into the mechanism box 1 through the connecting pipe 44; the connecting pipe 44 is L-shaped, the bottom end of the connecting pipe is provided with a limiting baffle 441 and a screw connection portion 442, the side wall of the mechanism box 1 is provided with a mounting hole, the screw connection portion 442 extends into the mechanism box 1 from the mounting hole to be connected with a locking nut 443 in a matched manner, and a sealing ring 444 is tightly pressed between the limiting baffle 441 and the outer wall of the mechanism box 1; the connecting pipe 44 with the hollow structure can enhance the installation stability of the transformer combination 6 in the embodiment, and the output wires can be arranged in the connecting pipe 44 to avoid adverse effects caused by the exposure of the output wires, so that the installation convenience is further improved, the sealing effect is achieved through the arrangement of the sealing ring 444, and dust and rainwater are prevented from entering the mechanism box 1 through the installation holes. In this embodiment, the current transformers include a zero sequence current transformer 45 and a phase protection current transformer 46.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While those obvious variations or modifications which come within the spirit of the invention remain within the scope of the invention.
Claims (11)
1. The outdoor vacuum circuit breaker comprises a mechanism box (1) and a solid-sealed pole (2) arranged at the upper part of the mechanism box (1), wherein a wire inlet end (21) and a wire outlet end (22) are arranged on the solid-sealed pole (2), a vacuum arc-extinguishing chamber (23) and a disconnecting switch (24) are arranged in the solid-sealed pole (2), and a disconnecting operation mechanism (11) for controlling the disconnecting switch (24) to be switched on and off and a circuit breaker operation mechanism (12) for controlling the vacuum arc-extinguishing chamber (23) to be switched on and off are arranged in the mechanism box (1); the vacuum circuit breaker is characterized in that the isolation operating mechanism (11) is interlocked with the circuit breaker operating mechanism (12) through a first interlocking mechanism (10) and a second interlocking mechanism (17), when the vacuum circuit breaker is in a closing state, the circuit breaker operating mechanism (12) locks the isolation operating mechanism (11) through the first interlocking mechanism (10), and at the moment, the second interlocking mechanism (17) is in an unlocking 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 a breaking state, the isolating operation mechanism (11) locks the circuit breaker operation mechanism (12) through the second interlocking mechanism (17), and at the moment, the first interlocking mechanism (10) is in an unlocking state, so that the isolating operation mechanism (11) is in an operable state, and the circuit breaker operation mechanism (12) is in an inoperable state;
the first interlocking mechanism (10) comprises a movable lock pin (14) in linkage connection with the circuit breaker operating mechanism (12) through a transmission assembly and a locking piece (15) in linkage connection with the isolation operating mechanism (11), the circuit breaker operating mechanism (12) drives the movable lock pin (14) to move to form locking fit or release locking fit with the locking piece (15) through the transmission assembly when in action, and the movable lock pin (14) is in locking fit with the locking piece (15) to lock the isolation operating mechanism (11) in a closing state when the circuit breaker operating mechanism (12) is in the closing 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 with a driving main shaft (121) in the circuit breaker operating mechanism (12), wherein a connecting groove (136) matched and connected with the driving shaft (134) is formed in the first connecting plate (132), the second connecting plate (133) is connected with the movable lock pin (14) through the connecting shaft (135), the driving main shaft (121) is operated and driven to rotate through the matching of the driving shaft (134) and the connecting groove (136) when the circuit breaker operating mechanism (12) acts, the movable lock pin (14) is driven to move through the second connecting plate (133), a limiting frame (18) for limiting and installing the movable lock pin (14) is fixedly arranged in the mechanism box (1), and a limiting frame (18) is provided with a limiting position for the movable lock pin (181) penetrating through the movable lock pin (14).
2. Outdoor vacuum circuit breaker according to claim 1, characterized in that the locking tab (15) is provided with a locking hole (151) suitable for the insertion of the mobile locking pin (14).
3. The outdoor vacuum circuit breaker according to claim 1, characterized in that a first spring (16) is sleeved on the movable lock pin (14), one end of the first spring (16) is connected to the limiting frame (18), the other end is connected to the movable lock pin (14), and the first spring (16) provides an elastic force for the movable lock pin (14) to move away from the locking piece (15);
the hole matched with the connecting shaft (135) on the movable lock pin (14) is a strip-shaped hole (141), the arrangement direction of the strip-shaped hole (141) is the axial direction of the movable lock pin (14), and the length of the strip-shaped hole (141) is smaller than the movement stroke of the movable lock pin (14).
4. The outdoor vacuum circuit breaker according to claim 1, characterized in that the second interlock mechanism (17) comprises a sliding plate (171) movably arranged in the mechanism box (1), a locking component for locking and unlocking the sliding plate (171) and a second spring (176) for providing elastic force for the sliding plate (171), the sliding plate (171) is provided with a pushing part (172), the locking component is connected with the isolation operating mechanism (11) in a linkage way, when the isolation operating mechanism (11) is in a closing state, the locking component releases the locking of the sliding plate (171), and a linkage piece linked with the circuit breaker operating mechanism (12) generates pushing force on the pushing part (172) to enable the sliding plate (171) to displace against the elastic force of the second spring (176).
5. The outdoor vacuum circuit breaker according to claim 4, characterized in that the locking assembly comprises a driving inclined plane (112) arranged on a driving crank arm (111) in the isolating operation mechanism (11), a locking rod (177) which is movable between the circuit breaker operation mechanism (12) and the isolating operation mechanism (11), a third spring (178) which provides the locking rod (177) with a moving trend towards the isolating operation mechanism (11), a limiting end (179) with an increased outer diameter is arranged at one end of the locking rod (177) close to the sliding plate (171), one end of the locking rod (177) close to the driving inclined plane (112) is abutted on the driving inclined plane (112) under the elastic force of the third spring (178), a strip-shaped sliding hole (173) which is arranged along the movable direction of the locking rod (171) is arranged on one end of the sliding rod (173), a positioning hole (174) which is suitable for being matched with the limiting end (179), and the limiting end (179) is matched with the positioning hole (174) to separate the sliding rod (171) when the sliding rod (179) is matched with the positioning hole (174), and the sliding rod (171) is locked.
6. The outdoor vacuum circuit breaker according to claim 5, wherein the sliding plate (171) is provided with a guiding sliding hole (175) arranged along the movable direction thereof, and the positioning bolt passes through the guiding sliding hole (175) to be connected with a fixing seat (122) on the circuit breaker operating mechanism (12) in a matching way.
7. The outdoor vacuum circuit breaker according to claim 1, characterized in that the isolating switch (24) is arranged in a vertical cavity on the solid-sealed pole (2), and comprises an upper conductive seat (241) and a lower conductive seat (242) which are fixed at intervals up and down, and a conductive contact arm (243) which can move up and down and is always connected with the lower conductive seat (242), one of the upper conductive seat (241) and the lower conductive seat (242) is connected with the incoming wire end (21), the other is electrically connected with the static end of the vacuum arc extinguishing chamber (23) through a conductive plate (244), the moving end of the vacuum arc extinguishing chamber (23) is electrically connected with the outgoing wire end (22), and the moving end of the vacuum arc extinguishing chamber (23) and the lower end of the conductive contact arm (243) are respectively connected with the circuit breaker operating mechanism (12) and the isolating operating mechanism (11) through an insulating pull rod (245); the solid sealed pole (2) is internally provided with an insulating rubber sleeve (246) between the upper conductive seat (241) and the lower conductive seat (242), the periphery of the insulating rubber sleeve (246) is tightly connected with the inner wall of the vertical cavity, the center of the insulating rubber sleeve (246) is provided with a perforation for the conductive contact arm (243) to pass through, the upper end of the insulating rubber sleeve (246) is integrally formed with a plurality of sector-shaped shielding plates (247) distributed along the circumferential direction at the perforation, the sector-shaped shielding plates (247) are spliced and sealed in the normal state, and the upper end of the conductive contact arm (243) is lower than the sector-shaped shielding plates (247) when the conductive contact arm (243) moves to the lowest position.
8. Outdoor vacuum circuit breaker according to claim 7, characterized in that a rubber gasket (3) is arranged between the bottom end of the solid sealing pole (2) and the mechanism box (1), the rubber gasket (3) is provided with an annular fold part (31) extending into the vertical cavity, and the inner edge of the annular fold part (31) is tightly connected with the insulating pull rod (245).
9. The outdoor vacuum circuit breaker according to claim 1, characterized in that the outlet end (22) of the solid-sealed pole (2) is provided with a conducting rod (211);
the utility model provides a solid sealed pole (2) outside demountable installation mutual-inductor subassembly (4), mutual-inductor subassembly (4) are including pouring casing (41) that are equipped with the trepanning, be fixed in shield sleeve (42) in the trepanning, and locate current transformer and voltage sensor (43) in pouring casing (41), mutual-inductor subassembly (4) pass through shield sleeve (42) close-fitting cup joint in on conducting rod (211) and pass through spacing part and inject, current transformer encircles shield sleeve (42), current transformer's output wire with voltage sensor (43) output wire is stretched out by pouring casing (41) and is introduced in mechanism case (1) with the controller electricity is connected, voltage sensor (43) input wire (431) electricity is connected conducting rod (211).
10. Outdoor vacuum circuit breaker according to claim 9, characterized in that a connecting pipe (44) of hollow structure is fixed at the bottom outlet of the casting housing (41), the bottom end of the connecting pipe (44) is connected with the mechanism box (1), and the output wire extends from the casting housing (41) and is led into the mechanism box (1) via the connecting pipe (44).
11. The outdoor vacuum circuit breaker according to claim 10, wherein the connecting pipe (44) is L-shaped, a limiting baffle (441) and a screw connection portion (442) are arranged at the bottom end of the connecting pipe, a mounting hole is formed in the side wall of the mechanism box (1), the screw connection portion (442) extends into the mechanism box (1) from the mounting hole to be connected with a locking nut (443) in a matched mode, and a sealing ring (444) is compressed between the limiting baffle (441) and the outer wall of the mechanism box (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111444574.4A CN114597091B (en) | 2021-11-30 | 2021-11-30 | Outdoor vacuum circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111444574.4A CN114597091B (en) | 2021-11-30 | 2021-11-30 | Outdoor vacuum circuit breaker |
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| Publication Number | Publication Date |
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| CN114597091A CN114597091A (en) | 2022-06-07 |
| CN114597091B true CN114597091B (en) | 2024-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN109193399A (en) * | 2018-10-15 | 2019-01-11 | 武胜县烈面镇小学 | A kind of isolator |
| CN111192776A (en) * | 2020-02-24 | 2020-05-22 | 正泰电气股份有限公司 | Mechanical interlocking device of isolating switch and circuit breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101893593B1 (en) * | 2016-11-09 | 2018-08-31 | 엘에스산전 주식회사 | molded case circuit breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101320640A (en) * | 2008-06-17 | 2008-12-10 | 宁波鹿鼎电子科技有限公司 | Anti-mistaken interlocking device of combined electrical apparatus |
| CN102332365A (en) * | 2011-09-27 | 2012-01-25 | 浙江华仪电器科技有限公司 | Vacuum breaker isolation device and anti-maloperation method thereof |
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| Publication number | Publication date |
|---|---|
| CN114597091A (en) | 2022-06-07 |
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