CN118588492B - An outdoor high voltage AC magnetically controlled vacuum circuit breaker with built-in isolation switch - Google Patents
An outdoor high voltage AC magnetically controlled vacuum circuit breaker with built-in isolation switch Download PDFInfo
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- CN118588492B CN118588492B CN202411070953.5A CN202411070953A CN118588492B CN 118588492 B CN118588492 B CN 118588492B CN 202411070953 A CN202411070953 A CN 202411070953A CN 118588492 B CN118588492 B CN 118588492B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 64
- 239000007787 solid Substances 0.000 abstract description 6
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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
- H01H33/666—Operating arrangements
- H01H33/6661—Combination with other type of switch, e.g. for load break switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/023—Base and stationary contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/026—Movable parts and contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
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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
- H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
- H01H33/38—Power arrangements internal to the switch for operating the driving mechanism using electromagnet
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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
-
- 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
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses an outdoor high-voltage alternating-current magnetic control vacuum circuit breaker with an internal isolation disconnecting link, which comprises a box body, a solid sealing pole, a magnetic control mechanism and an isolation disconnecting link mechanism; the solid-sealed polar pole comprises a pole body, a vacuum arc-extinguishing chamber and a soft bus; the magnetic control mechanism is arranged in the box body and is used for controlling the switching-on and switching-off of the vacuum arc-extinguishing chamber; the isolating knife switch mechanism comprises an isolating knife switch assembly and an operating mechanism; the isolating knife switch assembly is arranged in the pole body and comprises an isolating static contact, a moving knife base and a moving knife assembly; the operating mechanism is used for driving the movable knife assembly to contact with or separate from the isolation fixed contact. The vacuum circuit breaker directly drives the vacuum arc-extinguishing chamber to move up and down through the magnetic control mechanism to realize the switching-on and switching-off of the vacuum arc-extinguishing chamber, the structure is simpler, a transmission structure is not required to be added, and the fault risk is reduced; the isolating knife switch assembly is arranged in a built-in mounting mode, so that the isolating knife switch assembly is well protected, and smooth opening and closing actions of the isolating knife switch assembly are guaranteed.
Description
Technical Field
The invention relates to the technical field of overhead line pole-mounted switches of power distribution networks, in particular to an outdoor high-voltage alternating-current magnetic control vacuum circuit breaker with a built-in isolation disconnecting link.
Background
The vacuum circuit breaker is a power distribution device in a three-phase alternating current system, can be used for protecting and controlling electrical equipment in industrial and mining enterprises, power plants and substations, is particularly suitable for use places requiring oilless maintenance and frequent operation, and can be arranged in a centrally installed switchgear, a double-layer cabinet and a fixed cabinet to be used for controlling and protecting high-voltage electrical equipment. At present, the outdoor high-voltage alternating current vacuum circuit breaker mainly has the following defects:
1. Most of mechanisms used by outdoor high-voltage alternating-current vacuum circuit breakers are spring mechanisms; the vacuum arc-extinguishing chamber is driven to move up and down in the vertical direction by the horizontal left-right movement of the spring mechanism to realize the switching-on and switching-off of the vacuum arc-extinguishing chamber; because the spring mechanism has a large number of parts, the mechanism is more troublesome to debug; the up-and-down motion of the vacuum arc-extinguishing chamber is driven by the left-and-right motion of the spring mechanism, so that a transmission structure needs to be added between the spring mechanism and the vacuum arc-extinguishing chamber, and the risk of transmission faults is increased in subsequent use.
2. The isolating switch arranged on the outdoor high-voltage alternating current vacuum circuit breaker is open, the structure of the open isolating switch is exposed, and the disconnecting switch contacts of the isolating switch are oxidized, rusted and adhered due to the influence of factors such as pollution, so that the loop resistance is increased, and the opening and closing actions of the isolating switch are not smooth.
Disclosure of Invention
The invention aims to overcome the problems, and provides an outdoor high-voltage alternating-current magnetic control vacuum circuit breaker with an internal isolation disconnecting link, wherein a magnetic control mechanism is adopted to replace a spring mechanism in the prior art, and the magnetic control mechanism is used for directly driving a vacuum arc-extinguishing chamber to move up and down to realize the switching-on and switching-off of the vacuum arc-extinguishing chamber, so that the structure is simpler, a transmission structure is not required to be increased, and the fault risk is reduced; in addition, the isolation disconnecting link assembly adopts a built-in mounting mode, plays a good role in protecting the isolation disconnecting link assembly, and ensures smooth opening and closing actions of the isolation disconnecting link assembly.
The aim of the invention is achieved by the following technical scheme:
an outdoor high-voltage alternating-current magnetic control vacuum circuit breaker with an internal isolation disconnecting link comprises a box body, a solid sealing pole, a magnetic control mechanism and an isolation disconnecting link mechanism; wherein,
The solid-sealed polar pole comprises a pole body arranged outside the box body, a vacuum arc-extinguishing chamber arranged inside the pole body and a soft bus; the pole body is provided with an incoming wire connecting terminal and an outgoing wire connecting terminal; the static end of the vacuum arc-extinguishing chamber passes through a pole reserved hole arranged on the pole body and then is connected with the incoming wire connecting terminal; the magnetic control mechanism is arranged in the box body, the movable end of the vacuum arc-extinguishing chamber is connected with the magnetic control mechanism, and the magnetic control mechanism is used for controlling the switching-on and switching-off of the vacuum arc-extinguishing chamber;
The isolating knife switch mechanism comprises an isolating knife switch assembly and an operating mechanism; the isolating knife switch assembly is arranged in the pole body and comprises an isolating static contact, a moving knife base and a moving knife assembly; the isolation static contact is connected with the outgoing line wiring terminal; the movable cutter base is connected with the movable cutter assembly; one end of the soft bus is connected with the movable end of the vacuum arc-extinguishing chamber, and the other end of the soft bus is connected with the movable knife base; the operating mechanism is used for driving the movable knife assembly to move in the pole body, so that the movable knife assembly is contacted with or separated from the isolation fixed contact.
The working principle of the outdoor high-voltage alternating-current magnetic control vacuum circuit breaker with the built-in isolation disconnecting link is as follows:
The magnetic control mechanism drives the movable end of the vacuum arc-extinguishing chamber to move up and down through up and down movement, so that the switching-on and switching-off of the vacuum arc-extinguishing chamber is realized, and the abnormal problems of clamping stagnation and the like in the switching-on and switching-off process caused by the adoption of the spring mechanism for multistage transmission in the prior art are avoided; by operating the operating mechanism, the operating mechanism can drive the movable knife assembly to move up and down, and the movable knife assembly is contacted with and separated from the isolated fixed contact, so that the closing on and opening off actions are realized. The isolation fixed contact, the movable knife base and the movable knife component of the isolation knife switch mechanism are arranged inside the pole body and play an isolating role with the outside, so that oxidation, corrosion and adhesion of the isolation fixed contact, the movable knife base and the movable knife component due to pollution are avoided, and smooth opening and closing actions of the isolation knife switch mechanism are ensured.
The invention is characterized in that the solid sealed polar pole also comprises a connecting rod, an insulating pull rod and an adjusting rod which are arranged in the polar pole body; the upper end of the connecting rod is connected with the movable end of the vacuum arc-extinguishing chamber, the lower end of the connecting rod is connected with the upper end of the insulating pull rod, the lower end of the insulating pull rod is connected with the upper end of the adjusting rod, and the lower end of the adjusting rod is connected with the magnetic control mechanism. In the structure, the insulating pull rod mainly plays an insulating role, the insulating fixed contact is connected with the wire outgoing connecting terminal through the conducting rod, during installation, one end of the soft bus is connected with the movable end (lower end) of the vacuum arc extinguishing chamber through the connecting rod in a threaded mode, the lower end of the connecting rod is connected with the insulating pull rod through threads, the lower end of the insulating pull rod is connected with the adjusting rod through threads in a fixed mode, the whole assembled vacuum arc extinguishing chamber is installed in the pole body, the fixed end (upper end) of the vacuum arc extinguishing chamber penetrates through the pole reserved hole, then the wire incoming connecting terminal is installed after being locked and fixed through the nut, the other end of the soft bus is connected with the movable cutter base, then the conducting rod is installed, the conducting rod penetrates through the pole body and is connected with the insulating fixed contact, the wire outgoing connecting terminal is installed on the conducting rod, then the movable cutter component is installed, and then the assembly of the solid-sealed pole can be completed.
Preferably, the magnetic control mechanism comprises a mounting frame arranged on the box body, a static iron core arranged on the mounting frame, a movable iron core, a brake separating spring arranged between the static iron core and the movable iron core and an over-travel spring; the movable iron core is arranged below the static iron core, the over-travel spring is positioned in the brake separating spring, and the lower end of the adjusting rod sequentially penetrates through the static iron core and the movable iron core; one end of the brake separating spring acts on the static iron core, the other end of the brake separating spring acts on the movable iron core, and the over-travel spring acts between the movable iron core and the adjusting rod. The magnetic control mechanism is adopted, the total number of parts is small, the failure rate in later use is greatly reduced, and a transmission mechanism is not required to be arranged; the magnetic control mechanism is controlled by the controller, when the magnetic control mechanism works, a closing command is sent to the controller by the controller, the controller supplies a certain current to a coil in the static iron core, a magnetic field is generated after the coil is electrified, the generated magnetic field has the same direction as a magnet in the static iron core, the upper end of the movable iron core generates upward suction force, and weakens a permanent magnet magnetic field below the movable iron core, when the upward force is greater than the downward force, the movable iron core overcomes the elasticity of the opening spring and the over-travel spring to be attracted with the static iron core under the action of the magnetic force, the movable iron core drives the adjusting rod to move when moving upwards, and the insulating pull rod and the connecting rod also move upwards, so that the movable end of the vacuum arc-extinguishing chamber is driven to move upwards, and the vacuum arc-extinguishing chamber is closed; a brake separating command is given to the controller, the controller supplies current which is opposite to the closing current and has smaller value to the coil in the static iron core, a magnetic field is generated after the coil is electrified, the generated magnetic field is opposite to the direction of the magnet in the static iron core, when the attraction force generated by the magnetic field synthesized at the upper end of the movable iron core is smaller than the resultant force of the over-travel spring and the brake separating spring, the movable iron core moves downwards under the elasticity, the movable iron core drives the adjusting rod to move while moving downwards, the insulating pull rod and the connecting rod also move downwards, and then the movable end of the vacuum arc-extinguishing chamber is driven to move downwards, so that the vacuum arc-extinguishing chamber is separated; the vacuum arc extinguishing chamber is driven to move through the vertical movement of the magnetic control mechanism, transmission parts are reduced between the magnetic control mechanism and the vacuum arc extinguishing chamber, the transmission failure rate is greatly reduced, the magnetic control mechanism is simple to install, and the magnetic control mechanism is convenient to replace and maintain in the later period.
Further, the mounting frame comprises a mounting plate, a supporting rod and a limiting plate, wherein the mounting plate is arranged at the top of the box body, the supporting rod is connected between the mounting plate and the limiting plate, the static iron core is mounted on the mounting plate, and the movable iron core is in sliding connection with the limiting plate through a guide pin. The supporting rod fixes the mounting plate and the limiting plate; through setting up the guide pin, guarantee that the magnetic control mechanism control divide-shut brake in-process can not produce big displacement, the one end and the movable iron core of guide pin are connected, and the other end passes the limiting plate.
Preferably, the upper end of the adjusting rod is connected with the lower end of the insulating pull rod through threads, a fixing piece is arranged at the lower end of the movable iron core, the lower end of the adjusting rod penetrates through the fixing piece, and a flange hexagonal nut is arranged at the lower end of the adjusting rod. When the structure is installed, the magnetic control mechanism is fixed with the box body through the bolts and the nuts, and the upper end of the adjusting rod is connected with the lower end of the insulating pull rod through the threads, so that the distance between the upper end face of the adjusting rod and the top of the box body can be changed, and the distance is mainly adjusted to ensure that the elasticity provided by the compression of the over-travel spring in the magnetic control mechanism is matched with the contact pressure of the vacuum arc extinguishing chamber under the closing state of the magnetic control mechanism; when the flange hexagonal nut is installed, the distance between the upper end face of the flange hexagonal nut and the lower end face of the fixing piece is ensured, the overtravel spring is placed inside the magnetic control mechanism, the overtravel can be changed by changing the distance, and the total movement travel of the magnetic control mechanism is unchanged, so that the opening distance of the vacuum arc extinguishing chamber is changed while the overtravel is changed.
Preferably, the circuit breaker synchronizing shaft is rotatably arranged on the box body, a transmission assembly is arranged between the circuit breaker synchronizing shaft and the fixing piece, the transmission assembly comprises a connecting piece arranged on the fixing piece and a synchronizing shaft connecting rod arranged on the circuit breaker synchronizing shaft, and the synchronizing shaft connecting rod is hinged with the connecting piece through a pin shaft. The outdoor high-voltage alternating-current magnetic control vacuum circuit breaker with the built-in isolation disconnecting link is a three-phase circuit breaker, three fixed sealing polar posts are arranged, three corresponding magnetic control mechanisms and three isolation disconnecting link assemblies are arranged, and the three magnetic control mechanisms can synchronously move through arranging the synchronous shafts of the circuit breaker, so that the opening and closing time of the three-phase circuit breaker can be reduced.
Further, bearings are installed at two ends of the breaker synchronizing shaft, and the bearings are connected to the box body through the mounting sleeve and the mounting sleeve fixing plate.
Preferably, a first micro switch is arranged on the box body, a micro switch pressing block for triggering the first micro switch is arranged on the circuit breaker synchronizing shaft, the circuit breaker synchronizing shaft rotates clockwise or anticlockwise to drive the micro switch pressing block to rotate clockwise or anticlockwise, the micro switch pressing block presses or does not press the first micro switch, and accordingly the first micro switch outputs a dry contact signal, and a switch-on and switch-off position signal is provided for the controller. For example, when the magnetic control mechanism drives the vacuum arc-extinguishing chamber to switch on, the synchronous shaft of the circuit breaker rotates to drive the micro-switch pressing block to rotate, the micro-switch Guan Yakuai presses the first micro-switch, the first micro-switch is triggered, a dry contact signal is output, and a switch-on position signal is provided for the controller; when the magnetic control mechanism drives the vacuum arc-extinguishing chamber to break the gate, the synchronous shaft of the circuit breaker can reversely rotate to drive the micro-switch pressing block to rotate, the micro-switch pressing block is separated from the first micro-switch, namely the micro-switch pressing block does not press the first micro-switch, the first micro-switch is not triggered, a dry contact signal is output, and a break-gate position signal is provided for the controller.
Further, the first micro switch is arranged on the mounting sleeve fixing plate.
Preferably, the circuit breaker further comprises a switching indicating device, wherein the switching indicating device comprises a first switching mark arranged outside the box body, a rotating shaft rotatably arranged on the box body, a first pointer arranged at the outer end of the rotating shaft and used for indicating the first switching mark, a shifting fork arranged at the inner end of the rotating shaft, a long connecting rod arranged on the circuit breaker synchronizing shaft and a transmission rod arranged between the shifting fork and the long connecting rod; an open slot is formed in the end part of the shifting fork; one end of the transmission rod is fixedly connected with the long connecting rod, and the other end of the transmission rod extends into the open slot. In the structure, through setting up the switching indicating device, make things convenient for operating personnel's the outdoor high-voltage alternating current magnetic control vacuum circuit breaker's of built-in isolation switch switching state, first pointer is located the box outside, the shift fork is located the box inboard, magnetic control mechanism drive regulation pole carries out up-and-down motion, when realizing that vacuum interrupter closes the separating brake, the stationary blade can carry out up-and-down motion along with moving the iron core, under drive assembly's effect, drive circuit breaker synchronizing shaft forward rotation or reverse rotation, thereby drive long connecting rod rotation, and then drive the transfer line and rotate around circuit breaker synchronizing shaft, the transfer line can upwards or dial the shift fork downwards, drive the axis of rotation is rotatory, make first pointer indicate the closing position or the separating brake position in first mark that divides.
Preferably, the device also comprises a switching-on/off device which is arranged on the box body and used for controlling the magnetic control mechanism to execute switching-on/off, wherein the switching-on/off device comprises a switching-on/off operation handle, a mounting shaft, a switching-on/off shaft plate, a reset spring and a second micro switch; the mounting shaft is rotatably arranged on the box body, the opening and closing operation handle is fixed at the outer end of the mounting shaft, the opening and closing shaft plate is fixed at the inner end of the mounting shaft, a plurality of round pins for triggering second micro switches are arranged on the opening and closing shaft plate, two second micro switches are symmetrically distributed, and the second micro switches are connected with the controller; one end of the return spring acts on the box body, and the other end of the return spring acts on the opening and closing shaft plate. The working principle of the structure is as follows: the operator pulls down the left side of the opening and closing operation handle, overcomes the elasticity of the reset spring, drives the installation shaft and the opening and closing shaft plate to rotate anticlockwise, simultaneously rotates along with the round pin, one round pin presses the second micro switch on the left side, the second micro switch on the left side is changed from a normally open point to a normally closed point, a switching-off control signal is provided for the controller, the controller controls the magnetic control mechanism to work, and the vacuum arc extinguishing chamber is switched off, so that switching-off action is completed; releasing the opening and closing operation handle, and resetting the reset spring to drive the opening and closing shaft plate and the opening and closing operation handle to reset; similarly, a worker pulls the right side of the opening and closing operation handle downwards, overcomes the elasticity of a reset spring, drives the installation shaft and the opening and closing shaft plate to rotate clockwise together, simultaneously rotates together with the round pin, presses a second micro switch on the right side by the other round pin, changes a normally open point into a normally closed point, provides a closing control signal for the controller, and controls the magnetic control mechanism to work, so that the vacuum arc extinguishing chamber is closed, and the closing action is completed; and the opening and closing operation handle is loosened, and the reset spring is reset, so that the opening and closing shaft plate and the opening and closing operation handle are driven to reset.
Preferably, the movable cutter assembly comprises a movable cutter and a movable cutter guide piece, wherein the upper end of the movable cutter penetrates through the movable cutter base, and the lower end of the movable cutter is connected with the upper end of the movable cutter guide piece; the movable cutter guide piece is vertically arranged in the pole body in a sliding manner; the operating mechanism comprises an isolation disconnecting link synchronizing shaft, an isolation disconnecting link connecting rod, a long crank arm and an isolation operating handle; the isolation disconnecting link synchronizing shaft is rotatably arranged on the box body, and the isolation operating handle is arranged outside the box body and connected with the isolation disconnecting link synchronizing shaft; one end of the isolating knife switch connecting rod is hinged with the lower end of the movable knife guide piece, the other end of the isolating knife switch connecting rod is hinged with one end of the long crank arm, and the other end of the long crank arm is fixedly connected with the isolating knife switch synchronizing shaft. In the structure, the isolating knife switch mechanism adopts a plug-in structure, a worker pulls down the left side of the isolating operation handle to drive the isolating knife switch synchronous shaft to rotate, and then drives the long crank arm to rotate, so as to drive the isolating knife switch connecting rod to move, thereby driving the moving knife guide piece to move downwards, enabling the moving knife to move downwards, separating the upper end of the moving knife from the isolating static contact, and realizing the separation of the isolating knife switch mechanism; similarly, a worker pulls down the right side of the isolation operating handle to drive the isolation disconnecting link synchronizing shaft to reversely rotate, and then drives the long crank arm to reversely rotate, so as to drive the isolation disconnecting link connecting rod to move, and further drive the movable knife guide piece to move upwards, so that the movable knife moves upwards, the upper end of the movable knife contacts with the isolation fixed contact, and the closing of the isolation disconnecting link mechanism is realized; correspondingly, the three isolating knife switch connecting rods and the three long crank arms are arranged, and the isolating knife switch synchronizing shafts can realize synchronous movement of the three moving knife assemblies and realize synchronous switching-on and switching-off.
Further, a second switching mark is arranged on the box body, a second pointer for indicating the second switching mark is arranged on the isolation disconnecting link synchronizing shaft, and when the isolation operating handle is pulled to realize switching of the isolation disconnecting link mechanism, the second pointer moves along with the isolation disconnecting link synchronizing shaft, and the second pointer points to the switching position of the second switching mark; when the isolation operation handle is pulled to realize the closing of the isolation disconnecting link mechanism, the second pointer moves along with the isolation disconnecting link synchronizing shaft, and the second pointer points to the closing position of the second separation mark. Through setting up above-mentioned structure, be convenient for discern combined floodgate and separating brake.
Further, the isolation fixed contact and the movable blade base are fixedly sealed at a fixed position in the epoxy pouring process of the pole body, spring contact fingers are arranged in the isolation fixed contact and the movable blade base and used for increasing contact pressure among the isolation fixed contact, the movable blade base and the movable blade and guaranteeing good contact among the isolation fixed contact, the movable blade base and the movable blade.
Further, a limiting block is arranged on the isolation disconnecting link synchronizing shaft, a closing limiting pin and a disconnecting link limiting pin are arranged on the box body, when the isolation operating handle is pulled to close the isolation disconnecting link mechanism, the limiting block can rotate along with the isolation disconnecting link synchronizing shaft, and when the limiting block is blocked by the closing limiting pin, the limiting block cannot move continuously under the limit of the closing limiting pin, so that the isolation operating handle cannot be pulled, and the accuracy of the closing position is ensured; when the isolation operating handle is pulled to separate the isolation disconnecting link mechanism, the limiting block can rotate along with the isolation disconnecting link synchronizing shaft, when the limiting block is blocked by the separation disconnecting link limiting pin, the limiting block cannot move continuously under the limiting of the separation disconnecting link limiting pin, so that the isolation operating handle cannot be pulled, and the accuracy of the separation disconnecting link position is guaranteed.
Further, the operating mechanism further comprises a synchronizing mechanism arranged between the isolating switch synchronizing shaft and the box body, and the synchronizing mechanism comprises a short crank arm, a synchronizing spring, a long pin and a synchronizing base; the synchronous base is arranged on the box body, one end of the short crank arm is fixedly connected with the synchronous shaft of the isolating knife switch, and the other end of the short crank arm is hinged with one end of the long pin; the other end of the long pin is in sliding connection with the synchronous base; the synchronous spring is sleeved on the long pin, one end of the synchronous spring acts on the long pin, and the other end of the synchronous spring acts on the synchronous base. Because the three solid-sealed polar poles are independent, and the isolation operation mode of the isolation disconnecting link mechanism is mechanical transmission, each person operation mode is considered, so that the isolation disconnecting link can be completely closed and opened, and the three-phase switching-on and switching-off synchronization of the isolation disconnecting link is ensured, and a synchronization mechanism is further arranged on the isolation synchronization shaft; when the isolating knife switch mechanism is at the switching-on position, the synchronous spring is in a compressed state (the compression amount is small), the elasticity of the synchronous spring in the compressed state can ensure the switching-on stability, and the movable knife is reliably at the switching-on position by matching with the limiting block; when the isolating switch mechanism is at the switch-off position, the synchronous spring is in a compressed state (the compression amount is large), and the large compression amount can facilitate the switch-on of the isolating switch mechanism, reduce the switch-on operation moment and ensure the reliable switch-off position of the movable switch by matching with the limiting block.
Preferably, a hard interlocking device is arranged between the isolating knife switch synchronizing shaft and the circuit breaker synchronizing shaft, and comprises a transmission gear arranged on the isolating knife switch synchronizing shaft, a ratchet gear arranged on the box body, two pawls hinged on the box body, an extension spring arranged between each pawl and the box body, a sliding rod movably arranged on the box body, a cam arranged on the circuit breaker synchronizing shaft and used for driving the sliding rod to move, and a movable pull rod arranged between the sliding rod and each pawl; the transmission gear is meshed with the ratchet gear, one end of the movable pull rod is hinged with the pawl, and the other end of the movable pull rod is connected with one end of the slide rod in a sliding and rotating mode; the elastic force of the extension spring promotes the pawl to be meshed with the ratchet gear. When the vacuum arc-extinguishing chamber is at a closing position, the pawl is subjected to the spring force of the extension spring, so that the pawl is meshed with the ratchet gear, and the ratchet gear cannot rotate at the moment and the transmission gear cannot rotate, so that the isolation operation handle cannot rotate, and the isolation knife switch mechanism cannot be opened or closed; when the vacuum arc-extinguishing chamber is at the opening position, a cam on the synchronous shaft of the circuit breaker is pressed on the slide bar to push the slide bar to move and drive the movable pull bar to move, so that the pawl is driven to overcome the elasticity of the tension spring to separate from the ratchet gear, the ratchet gear at the moment can rotate, and the isolation operation handle can be operated to realize opening or closing of the isolation disconnecting link mechanism.
Compared with the prior art, the invention has the following beneficial effects:
1. According to the outdoor high-voltage alternating current magnetic control vacuum circuit breaker with the built-in isolation disconnecting link, a magnetic control mechanism is adopted to replace a spring mechanism in the prior art, and the magnetic control mechanism drives a movable end of a vacuum arc-extinguishing chamber to move up and down through up and down movement, so that switching-on and switching-off of the vacuum arc-extinguishing chamber are realized, and abnormal problems such as clamping stagnation and the like in the switching-on and switching-off process caused by multistage transmission of the spring mechanism in the prior art are avoided; the structure is simpler, need not to increase transmission structure, reduces the fault risk, reduces the maintenance.
2. According to the outdoor high-voltage alternating current magnetic control vacuum circuit breaker with the built-in isolation disconnecting link, the isolation fixed contact, the movable knife base and the movable knife assembly of the isolation disconnecting link mechanism are arranged in the pole body and are isolated from the outside, oxidation, corrosion and adhesion of the isolation fixed contact, the movable knife base and the movable knife assembly due to pollution are avoided, and smooth opening and closing actions of the isolation disconnecting link mechanism are ensured.
Drawings
Fig. 1 is a schematic perspective view of one embodiment of an outdoor high-voltage ac magnetic control vacuum circuit breaker with a built-in isolation switch.
Fig. 2 is a front view of the outdoor high-voltage ac magnetic control vacuum circuit breaker with the built-in isolating switch in the invention.
Fig. 3 is a cross-sectional view taken along A-A in fig. 2.
Fig. 4 is a schematic view of the internal structure of the encapsulated pole in the present invention.
Fig. 5 is a schematic diagram of a three-dimensional structure of the bottom of a hidden box of the outdoor high-voltage alternating-current magnetic control vacuum circuit breaker with the built-in isolation knife switch.
Fig. 6 is a bottom view of the hidden case bottom of the outdoor high-voltage ac magnetic control vacuum circuit breaker with the built-in isolating switch in the present invention.
Fig. 7 is a schematic diagram of a three-dimensional structure of the bottom and the side of a hidden case of the outdoor high-voltage ac magnetic control vacuum circuit breaker with the built-in isolation knife switch.
Fig. 8 is a schematic perspective view of a part of an outdoor high-voltage ac magnetic control vacuum circuit breaker with a built-in isolation switch.
Fig. 9 is a schematic perspective view of a magnetic control mechanism in the present invention.
Fig. 10 is a cross-sectional view of a magnetic control mechanism in the present invention.
Fig. 11 is a schematic perspective view of a split-combination indicating device according to the present invention.
Fig. 12 is a schematic perspective view of an opening and closing device according to the present invention.
Fig. 13 is a rear view of the opening and closing device in the present invention.
Fig. 14 is a schematic perspective view of an isolation switch mechanism in the present invention.
Fig. 15 is a schematic structural view of the hard interlock device in the present invention.
Detailed Description
In order that those skilled in the art will well understand the technical solutions of the present invention, the following describes the present invention further with reference to examples and drawings, but the embodiments of the present invention are not limited thereto.
Referring to fig. 1-3, the embodiment discloses an outdoor high-voltage alternating current magnetic control vacuum circuit breaker with a built-in isolation disconnecting link, which comprises a box body 1, a solid sealing pole 2, a magnetic control mechanism 3 and an isolation disconnecting link mechanism 4.
Referring to fig. 1 to 8, the solid sealed pole 2 includes a pole body 21 disposed outside the case 1, a vacuum arc extinguishing chamber 22 disposed inside the pole body 21, and a flexible bus 23; the pole body 21 is provided with an incoming wire connecting terminal 15 and an outgoing wire connecting terminal 16; the static end of the vacuum arc-extinguishing chamber 22 passes through a pole reserved hole arranged on the pole body 21 and then is connected with the wire-incoming wiring terminal 15; the magnetic control mechanism 3 is arranged in the box body 1, the movable end of the vacuum arc-extinguishing chamber 22 is connected with the magnetic control mechanism 3, and the magnetic control mechanism 3 is used for controlling the switching-on and switching-off of the vacuum arc-extinguishing chamber 22.
Referring to fig. 1-7 and 14, the isolation switch mechanism 4 includes an isolation switch assembly and an operating mechanism 41; the isolating switch assembly is arranged inside the pole body 21 and comprises an isolating static contact 42, a moving blade base 43 and a moving blade assembly 44; the isolating static contact 42 is connected with the outgoing line wiring terminal 16; the movable cutter base 43 is connected with the movable cutter assembly 44; one end of the soft bus 23 is connected with the movable end of the vacuum arc extinguishing chamber 22, and the other end of the soft bus 23 is connected with the movable knife base 43; the operating mechanism 41 is used for driving the moving blade assembly 44 to move inside the pole body 21, so that the moving blade assembly 44 contacts with or separates from the isolating stationary contact 42, and the closing and opening of the isolating switch mechanism 4 are realized.
Referring to fig. 1-3, the box body 1 is formed by welding a stainless steel plate after bending, the protection level of the box body 1 can reach IP67, components installed in the box body 1 can be protected, and the service life of the outdoor high-voltage alternating current magnetic control vacuum circuit breaker with the built-in isolation disconnecting link is prolonged. Considering the use of a distribution network engineering scheme, in the manufacturing process of the pole body 21 of the solid-sealed pole 2 used in the embodiment, the phase sequence zero sequence current sensor is completely sealed therein, and the voltage sensor at the line inlet and outlet side and the electricity taking capacitor are separately packaged. The phase sequence zero sequence current sensor is arranged on the outlet side of the pole body 21 and provides signals for subsequent measurement and protection; the voltage sensor can be arranged on the incoming line side or the outgoing line side of the pole body 21 according to actual requirements; in order to increase the power of the power take-off capacitor, the power take-off capacitor may be installed at the in-or out-wire side of the pole body 21; meanwhile, in order to replace the vacuum interrupter 22, the vacuum interrupter 22 is not sealed in the pole body 21 when epoxy casting is performed.
Referring to fig. 1-4 and 7-8, the solid sealed pole 2 further includes a connecting rod 24, an insulating pull rod 25, and an adjusting rod 26 disposed inside the pole body 21; the upper end of the connecting rod 24 is connected with the movable end of the vacuum arc-extinguishing chamber 22, the lower end of the connecting rod 24 is connected with the upper end of the insulating pull rod 25, the lower end of the insulating pull rod 25 is connected with the upper end of the adjusting rod 26, and the lower end of the adjusting rod 26 is connected with the magnetic control mechanism 3. In the above structure, the insulating pull rod 25 mainly plays an insulating role, the insulating fixed contact 42 and the wire outgoing terminal 16 are connected through the conductive rod 17, during installation, firstly, one end of the soft bus 23 and the movable end (lower end) of the vacuum arc extinguishing chamber 22 are fixedly connected through the connecting rod 24 in a threaded manner, the lower end of the connecting rod 24 is fixedly connected with the insulating pull rod 25 through threads, the lower end of the insulating pull rod 25 is fixedly connected with the adjusting rod 26 through threads, the whole assembled vacuum arc extinguishing chamber 22 is installed in the pole body 21, the fixed end (upper end) of the vacuum arc extinguishing chamber 22 penetrates through a pole reserved hole, then the wire incoming terminal 15 is installed after being locked and fixed through a nut, the other end of the soft bus 23 is connected with the movable cutter base 43, then the conductive rod 17 is installed, the conductive rod 17 penetrates through the pole body 21 and is connected with the insulating fixed contact 42, the wire outgoing terminal 16 is installed on the conductive rod 17, and then the movable cutter assembly 44 is installed, so that the assembly of the solid-sealed pole 2 can be completed.
Referring to fig. 1-6 and 8-10, the magnetic control mechanism 3 includes a mounting frame 31 provided on the case 1, a stationary core 32 provided on the mounting frame 31, a movable core 33, a brake release spring 34 provided between the stationary core 32 and the movable core 33, and an over travel spring 35; the movable iron core 33 is arranged below the static iron core 32, the over-travel spring 35 is positioned in the brake separating spring 34, and the lower end of the adjusting rod 26 sequentially passes through the static iron core 32 and the movable iron core 33; one end of the brake release spring 34 acts on the static iron core 32 or the mounting frame 31, the other end of the brake release spring 34 acts on the movable iron core 33, and the over-travel spring 35 acts between the movable iron core 33 and the adjusting rod 26; the over travel spring 35 and the brake separating spring 34 are sleeved on the adjusting rod 26. The magnetic control mechanism 3 is adopted, the total number of parts is small, the failure rate in later use is greatly reduced, and a transmission mechanism is not required to be arranged; the stationary core 32 includes a yoke, a magnet, and a coil; the magnetic control mechanism 3 is controlled by a controller, and when the magnetic control mechanism works, a closing command is given to the controller by the controller, the controller supplies a certain current to a coil in the static iron core 32, a magnetic field is generated after the coil is electrified, the generated magnetic field has the same direction as that of a magnet in the static iron core 32, the upper end of the movable iron core 33 generates upward suction force, the permanent magnet magnetic field below the movable iron core 33 is weakened, when the upward force is larger than the downward force, the movable iron core 33 overcomes the elasticity of the opening spring 34 and the over-travel spring 35 to be attracted with the static iron core 32 under the action of the magnetic force, the movable iron core 33 moves upwards and drives the adjusting rod 26 to move, the insulating pull rod 25 and the connecting rod 24 also move upwards, and further the movable end of the vacuum arc extinguishing chamber 22 is driven to move upwards, so that the vacuum arc extinguishing chamber 22 is closed; a brake separating command is given to the controller, the controller applies a current which is opposite to the closing current and has smaller value to the coil in the static iron core 32, a magnetic field is generated after the coil is electrified, the generated magnetic field is opposite to the direction of the magnet in the static iron core 32, when the attraction force generated by the combined magnetic field at the upper end of the movable iron core 33 is smaller than the resultant force of the over-travel spring 35 and the brake separating spring 34, the movable iron core 33 downwards moves under the elasticity, the movable iron core 33 is repelled with the static iron core 32 under the action of the magnetic force, the movable iron core 33 downwards moves and simultaneously drives the adjusting rod 26 to move, the insulating pull rod 25 and the connecting rod 24 downwards move, and then the movable end of the vacuum arc extinguishing chamber 22 downwards moves, so that the vacuum arc extinguishing chamber 22 is separated; the vacuum arc extinguishing chamber 22 is driven to move through the vertical movement of the magnetic control mechanism 3, transmission parts are reduced between the magnetic control mechanism 3 and the vacuum arc extinguishing chamber, the transmission failure rate is greatly reduced, the magnetic control mechanism 3 is simple to install, and the magnetic control mechanism is convenient to replace and maintain in the later period.
Referring to fig. 1-6 and 8-10, the mounting frame 31 includes a mounting plate 311, a support bar 312, and a limiting plate 313, the mounting plate 311 is disposed at the top of the case 1, the support bar 312 is connected between the mounting plate 311 and the limiting plate 313, the stationary core 32 is mounted on the mounting plate 311, and the movable core 33 is slidably connected with the limiting plate 313 through a guide pin 38. The supporting rod 312 fixes the mounting plate 311 and the limiting plate 313; by arranging the guide pin 38, the magnetic control mechanism 3 is ensured not to generate large displacement in the process of controlling the opening and closing, and simultaneously, the guide function is also realized, one end of the guide pin 38 is connected with the movable iron core 33, and the other end of the guide pin passes through the limiting plate 313.
The mounting plate 311 is fixed with the case 1 by bolts and nuts.
Referring to fig. 1-10, the upper end of the adjusting rod 26 is connected with the lower end of the insulating pull rod 25 through threads, the lower end of the movable iron core 33 is provided with a fixing piece 36, the lower end of the adjusting rod 26 passes through the fixing piece 36, and the lower end of the adjusting rod 26 is provided with a flange hexagonal nut 37. When the structure is installed, the magnetic control mechanism 3 is fixed with the box body 1 by bolts and nuts, and the upper end of the adjusting rod 26 is connected with the lower end of the insulating pull rod 25 by threads, so that the distance between the upper end surface of the adjusting rod 26 and the top of the box body 1 can be changed, and the distance is mainly adjusted to ensure that the elastic force provided by the compression of the over-travel spring 35 in the magnetic control mechanism 3 is matched with the contact pressure of the vacuum arc extinguishing chamber 22 when the magnetic control mechanism 3 is in a closing state; when the flange hexagonal nut 37 is installed, the distance between the upper end surface of the flange hexagonal nut 37 and the lower end surface of the fixing piece 36 is ensured, because the over travel spring 35 is arranged inside the magnetic control mechanism 3, the over travel can be changed by changing the distance, and because the total travel of the movement of the magnetic control mechanism 3 is unchanged, the opening distance of the vacuum arc extinguishing chamber 22 is changed while the over travel is changed.
Referring to fig. 1-10, a circuit breaker synchronizing shaft 7 is rotatably arranged on the box 1, a transmission assembly is arranged between the circuit breaker synchronizing shaft 7 and the fixing piece 36, the transmission assembly comprises a connecting piece 8 arranged on the fixing piece 36 and a synchronizing shaft connecting rod 9 arranged on the circuit breaker synchronizing shaft 7, and the synchronizing shaft connecting rod 9 is hinged with the connecting piece 8 through a pin shaft. The outdoor high-voltage alternating-current magnetic control vacuum circuit breaker with the built-in isolation disconnecting link in the embodiment is a three-phase circuit breaker, the solid-sealed polar pole 2 is provided with three, the corresponding magnetic control mechanisms 3 and isolation disconnecting link components are all three, and the three magnetic control mechanisms 3 can synchronously move through the arrangement of the circuit breaker synchronizing shaft 7, so that the switching-on and switching-off time of the three-phase circuit breaker can be reduced.
Referring to fig. 1-8, bearings are mounted at both ends of the breaker synchronizing shaft 7, and are connected to the case 1 through a mounting sleeve 10 and a mounting sleeve fixing plate 11.
Referring to fig. 1-8, a first micro switch 12 is disposed on the case 1, a micro switch pressing block 13 for triggering the first micro switch 12 is disposed on the circuit breaker synchronizing shaft 7, and the circuit breaker synchronizing shaft 7 rotates clockwise or anticlockwise to drive the micro switch pressing block 13 to rotate clockwise or anticlockwise, so that the micro switch pressing block 13 presses or does not press the first micro switch 12, and the first micro switch 12 outputs a dry contact signal to provide an opening and closing position signal for the controller. For example, when the magnetic control mechanism 3 drives the vacuum arc-extinguishing chamber 22 to switch on, the breaker synchronizing shaft 7 rotates to drive the micro-switch pressing block 13 to rotate, the micro-switch pressing block 13 presses the first micro-switch 12, the first micro-switch 12 triggers, a dry contact signal is output, and a switch-on position signal is provided for the controller; when the magnetic control mechanism 3 drives the vacuum arc-extinguishing chamber 22 to break, the breaker synchronizing shaft 7 can reversely rotate to drive the micro-switch pressing block 13 to rotate, the micro-switch pressing block 13 is separated from the first micro-switch 12, namely the micro-switch pressing block 13 does not press the first micro-switch 12, the first micro-switch 12 is not triggered, a dry contact signal is output, and a break position signal is provided for the controller.
Referring to fig. 8, the first micro switch 12 is disposed on the mounting sleeve fixing plate 11.
Referring to fig. 1-2, 5-8 and 11, the circuit breaker further comprises a switching indicating device 5, wherein the switching indicating device 5 comprises a first switching mark 51 arranged outside the box body 1, a rotating shaft 52 rotatably arranged on the box body 1, a first pointer 53 arranged at the outer end of the rotating shaft 52 and used for indicating the first switching mark 51, a shifting fork 54 arranged at the inner end of the rotating shaft 52, a long connecting rod 55 arranged on the circuit breaker synchronizing shaft 7 and a transmission rod 56 arranged between the shifting fork 54 and the long connecting rod 55; an open slot is arranged at the end part of the shifting fork 54; one end of the transmission rod 56 is fixedly connected with the long connecting rod 55, and the other end of the transmission rod 56 extends into the open slot. In the above structure, through setting up the switching indicating device 5, make things convenient for operating personnel's the outdoor high voltage alternating current magnetic control vacuum circuit breaker's of knowing built-in isolation switch switching state, first pointer 53 is located the box 1 outside, the shift fork 54 is located the box 1 inboard, magnetic control mechanism 3 drive adjusts pole 26 and carries out the up-and-down motion, when realizing that vacuum interrupter 22 closes the switching, stationary blade 36 can carry out the up-and-down motion along with movable iron core 33, under drive assembly's effect, drive circuit breaker synchronizing shaft 7 forward rotation or reverse rotation, thereby drive long connecting rod 55 rotation, and then drive transfer line 56 rotates round circuit breaker synchronizing shaft 7, transfer line 56 can upwards or dial down shift fork 54, drive axis of rotation 52 rotation, make first pointer 53 indicate the closing position or the switching position in first switching sign 51.
Referring to fig. 1-6 and fig. 12-13, the device further comprises a switching device 6 arranged on the box body 1 and used for controlling the magnetic control mechanism 3 to execute switching, wherein the switching device 6 comprises a switching operation handle 61, a mounting shaft 62, a switching shaft plate 63, a return spring 64 and a second micro switch 65; the mounting shaft 62 is rotatably arranged on the box body 1, the opening and closing operation handle 61 is fixed at the outer end of the mounting shaft 62, the opening and closing shaft plate 63 is fixed at the inner end of the mounting shaft 62, a plurality of round pins 66 for triggering the second micro-switches 65 are arranged on the opening and closing shaft plate 63, two second micro-switches 65 are symmetrically distributed and are arranged on the box body 1, and the second micro-switches 65 are connected with the controller; one end of the return spring 64 acts on the case 1, and the other end of the return spring 64 acts on the switching shaft plate 63. The working principle of the structure is as follows: the operator pulls down the left side of the opening and closing operation handle 61 and overcomes the elasticity of the return spring 64 to drive the installation shaft 62 and the opening and closing shaft plate 63 to rotate anticlockwise, meanwhile, the round pin 66 rotates along with the opening and closing operation handle, one round pin 66 presses the second micro switch 65 on the left side, the second micro switch 65 on the left side is changed from a normally open point to a normally closed point, an opening and closing control signal is provided for the controller, and the controller controls the magnetic control mechanism 3 to work, so that the vacuum arc extinguishing chamber 22 is opened, and the opening and closing action is completed; releasing the opening and closing operation handle 61, and resetting the reset spring 64 to drive the opening and closing shaft plate 63 to reset with the opening and closing operation handle 61; similarly, the operator pulls the right side of the opening and closing operation handle 61 downwards, overcomes the elasticity of the reset spring 64, drives the installation shaft 62 and the opening and closing shaft plate 63 to rotate clockwise, simultaneously rotates together with the round pin 66, presses the second micro switch 65 on the right side by the other round pin 66, changes the normally open point into the normally closed point of the second micro switch 65 on the right side, provides a closing control signal for the controller, and controls the magnetic control mechanism 3 to work, so that the vacuum arc-extinguishing chamber 22 is closed, and the closing action is completed; releasing the opening and closing operation handle 61, the return spring 64 resets, and the opening and closing shaft plate 63 and the opening and closing operation handle 61 are driven to reset.
Referring to fig. 1 to 7 and 14, the moving blade assembly 44 includes a moving blade 441 and a moving blade guide 442, an upper end of the moving blade 441 passes through the moving blade base 43, and a lower end of the moving blade 441 is coupled to an upper end of the moving blade guide 442 by a bolt; the movable blade guide 442 is vertically slidably disposed inside the pole body 21; the operating mechanism 41 comprises an isolating switch synchronizing shaft 411, an isolating switch connecting rod 412, a long crank arm 413 and an isolating operating handle 414; the isolating switch synchronizing shaft 411 is rotatably arranged on the box body 1, and the isolating operation handle 414 is arranged outside the box body 1 and connected with the isolating switch synchronizing shaft 411; one end of the isolating switch connecting rod 412 is hinged to the lower end of the moving knife guide 442 through a nylon pin, the other end of the isolating switch connecting rod 412 is hinged to one end of the long crank arm 413 through a nylon pin, and the other end of the long crank arm 413 is fixedly connected with the isolating switch synchronizing shaft 411. In the above structure, the isolating switch mechanism 4 adopts a plug-in structure, a worker pulls down the left side of the isolating operation handle 414 to drive the isolating switch synchronous shaft 411 to rotate, and drives the long crank arm 413 to rotate, so as to drive the isolating switch connecting rod 412 to move, and further drive the moving switch guide 442 to move downwards, so that the moving switch 441 moves downwards, and the upper end of the moving switch 441 is separated from the isolating static contact 42, thereby realizing the switch-off of the isolating switch mechanism 4; similarly, a worker pulls down the right side of the isolation operating handle 414 to drive the isolation disconnecting link synchronizing shaft 411 to reversely rotate, and then drives the long crank arm 413 to reversely rotate, so as to drive the isolation disconnecting link connecting rod 412 to move, and further drive the movable knife guide 442 to move upwards, so that the movable knife 441 moves upwards, and the upper end of the movable knife 441 contacts with the isolation fixed contact 42 to realize the closing of the isolation disconnecting link mechanism 4; correspondingly, the isolation knife switch connecting rod 412 and the long crank arm 413 are provided with three, and the isolation knife switch synchronizing shaft 411 can realize the synchronous motion of the three movable knife assemblies 44, so as to realize synchronous switch-on and switch-off.
Referring to fig. 1-7 and 14, the pole body 21 is provided with a guide slot extending vertically, the moving blade guide 442 is provided with a guide block, the guide block is slidably matched with the guide slot, and the moving blade guide 442 is ensured to move stably in the vertical direction by arranging the guide slot.
Referring to fig. 1-7 and 14, a second opening and closing mark 45 is provided on the case 1, a second pointer 46 for indicating the second opening and closing mark 45 is provided on the isolation switch synchronization shaft 411, when the isolation operation handle 414 is pulled to realize opening and closing of the isolation switch mechanism 4, the second pointer 46 moves along with the isolation switch synchronization shaft 411, and the second pointer 46 points to the opening and closing position of the second opening and closing mark 45; when the isolation operation handle 414 is pulled to realize the closing of the isolation switch mechanism 4, the second pointer 46 moves along with the isolation switch synchronizing shaft 411, and the second pointer 46 points to the closing position of the second opening mark 45. Through setting up above-mentioned structure, be convenient for discern combined floodgate and separating brake.
Referring to fig. 1-7 and 14, the isolation static contact 42 and the movable blade base 43 are already sealed in a fixed position in the epoxy casting process of the pole body 21, and a spring contact finger 48 is mounted inside the isolation static contact 42 and the movable blade base 43, and the spring contact finger 48 is used for increasing the contact pressure between the isolation static contact 42, the movable blade base 43 and the movable blade 441 and ensuring good contact between the isolation static contact 42, the movable blade base 43 and the movable blade 441.
Referring to fig. 1-7 and 14, the isolation switch synchronizing shaft 411 is provided with a limiting block 47, the box 1 is provided with a closing limiting pin and a separating brake limiting pin for limiting the limiting block 47, the closing limiting pin and the separating brake limiting pin are arranged in parallel with the isolation switch synchronizing shaft 411, when the isolation switch mechanism 4 is closed by pulling the isolation operation handle 414, the limiting block 47 can rotate along with the isolation switch synchronizing shaft 411, and when the limiting block 47 is blocked by the closing limiting pin, the limiting block 47 cannot move continuously under the limit of the closing limiting pin, so that the isolation operation handle 414 cannot be pulled, and the accuracy of the closing position is ensured; when the isolation operation handle 414 is pulled to break the isolation switch mechanism 4, the limiting block 47 can rotate along with the isolation switch synchronizing shaft 411, and when the limiting block 47 is blocked by the break switch limiting pin, the limiting block 47 cannot move continuously under the limit of the break switch limiting pin, so that the isolation operation handle 414 cannot be pulled, and the accuracy of the break switch position is ensured.
Referring to fig. 1-7 and 14, the operating mechanism 41 further includes a synchronizing mechanism 415 disposed between the isolation switch synchronizing shaft 411 and the case 1, and the synchronizing mechanism 415 includes a short lever 4151, a synchronizing spring 4152, a long pin 4153, and a synchronizing base 4154; the synchronous base 4154 is mounted on the box 1, one end of the short crank arm 4151 is fixedly connected with the isolating switch synchronous shaft 411, and the other end of the short crank arm 4151 is hinged with one end of the long pin 4153; the other end of the long pin 4153 is slidably connected to the synchronizing base 4154; the synchronizing spring 4152 is sleeved on the long pin 4153, one end of the synchronizing spring 4152 acts on the long pin 4153, and the other end of the synchronizing spring 4152 acts on the synchronizing base 4154. Because the three solid-sealed polar poles 2 are independent, and the isolation operation mode of the isolation disconnecting link mechanism 4 is mechanical transmission, each person operation mode is considered, so that the isolation disconnecting link can be completely closed and opened, and the three-phase switching-on and switching-off synchronization of the isolation disconnecting link is ensured, and the isolation synchronizing shaft is further provided with a synchronizing mechanism 415; when the isolating knife switch mechanism 4 is at the switch-on position, the synchronous spring 4152 is in a compressed state (the compression amount is small), the elasticity of the synchronous spring 4152 in the compressed state can ensure the stability of switch-on, and the movable knife 441 is reliably at the switch-on position by matching with the limiting block 47; when the isolating switch mechanism 4 is at the switch-off position, the synchronous spring 4152 is in a compressed state (the compression amount is large), the large compression amount can facilitate the switch-on of the isolating switch mechanism 4, the switch-on operation moment is reduced, and the movable knife 441 is matched with the limiting block 47 to ensure the reliable switch-off position. In addition, in another embodiment of the isolating switch mechanism 4, when the isolating switch mechanism 4 is at the switch-on position, the synchronous spring 4152 is in a compressed state (with a large compression amount), so that the isolating switch mechanism 4 is conveniently switched off, and the switching-off operation moment is reduced; the limiting block 47 ensures that the movable knife 441 is reliably at the closing position; when the isolating knife switch mechanism 4 is at the switch-off position, the synchronous spring 4152 is in a compressed state (the compression amount is small), the elasticity of the synchronous spring 4152 in the compressed state can ensure the stability of switch-off, and the movable knife 441 is reliably at the switch-off position by matching with the limiting block 47.
Referring to fig. 1-7 and 15, the distribution network product must have five protection measures during use. A hard interlocking device 14 is arranged between the isolating switch synchronous shaft 411 and the circuit breaker synchronous shaft 7, the hard interlocking device 14 comprises a transmission gear 141 arranged on the isolating switch synchronous shaft 411, a ratchet gear 142 arranged on the box body 1, two pawls 143 hinged on the box body 1, a tension spring 144 arranged between each pawl 143 and the box body 1, a sliding rod 145 movably arranged on the box body 1, a cam 146 arranged on the circuit breaker synchronous shaft 7 and used for driving the sliding rod 145 to move, and a movable pull rod 147 arranged between the sliding rod 145 and each pawl 143; the two pawls 143 are vertically symmetrically distributed, the transmission gear 141 is meshed with the ratchet gear 142, one end of the movable pull rod 147 is hinged with the pawls 143, and the other end of the movable pull rod 147 is slidingly and rotatably connected with one end of the slide rod 145; the elastic force of the tension spring 144 urges the pawl 143 to engage on the ratchet gear 142. When the vacuum arc-extinguishing chamber 22 is at the closing position, the pawl 143 is subjected to the spring force of the extension spring 144, so that the pawl 143 is meshed with the ratchet gear 142, the ratchet gear 142 cannot rotate at the moment, the transmission gear 141 cannot rotate, the isolating operation handle 414 cannot rotate, and the isolating knife switch mechanism 4 cannot be opened or closed; when the vacuum arc-extinguishing chamber 22 is at the opening position, a cam 146 on the synchronous shaft 7 of the circuit breaker is pressed on the slide bar 145, the slide bar 145 is pushed to move, the movable pull bar 147 is driven to move, the pawl 143 is driven to overcome the elasticity of the tension spring 144 to separate from the ratchet gear 142, the ratchet gear 142 can rotate at the moment, the isolation operating handle 414 can be operated, and the opening or closing of the isolation disconnecting link mechanism 4 is realized.
Referring to fig. 1 to 7, the working principle of the outdoor high-voltage ac magnetic control vacuum circuit breaker with the built-in isolation switch is as follows:
The magnetic control mechanism 3 drives the movable end of the vacuum arc-extinguishing chamber 22 to move up and down through up and down movement, so that the switching-on and switching-off of the vacuum arc-extinguishing chamber 22 is realized, and the abnormal problems of clamping stagnation and the like in the switching-on and switching-off process caused by the adoption of the spring mechanism for multistage transmission in the prior art are avoided; by operating the operating mechanism 41, the operating mechanism 41 drives the moving blade assembly 44 to move up and down, so as to complete the contact and separation of the moving blade assembly 44 and the isolating static contact 42, thereby realizing the actions of closing on and opening off. The isolation fixed contact 42, the movable knife base 43 and the movable knife assembly 44 of the isolation knife switch mechanism 4 are arranged inside the pole body 21 and play an isolated role with the outside, so that oxidation, corrosion and adhesion of the isolation fixed contact 42, the movable knife base 43 and the movable knife assembly 44 due to pollution are avoided, and smooth opening and closing actions of the isolation knife switch mechanism 4 are ensured.
The foregoing is illustrative of the present invention, and is not to be construed as limiting thereof, but rather as various changes, modifications, substitutions, combinations, and simplifications which may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (9)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202411070953.5A CN118588492B (en) | 2024-08-06 | 2024-08-06 | An outdoor high voltage AC magnetically controlled vacuum circuit breaker with built-in isolation switch |
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| CN202411070953.5A CN118588492B (en) | 2024-08-06 | 2024-08-06 | An outdoor high voltage AC magnetically controlled vacuum circuit breaker with built-in isolation switch |
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| CN119208073B (en) * | 2024-10-08 | 2025-07-29 | 江西浩拓电气科技有限公司 | Contactless switching brake secondary fuses on-column circuit breaker |
| CN120261209B (en) * | 2025-04-10 | 2025-10-10 | 江苏镇德电力设备有限公司 | A burn-proof primary and secondary fusion sleeve column circuit breaker |
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