CN113328370B - Upper isolation upper grounding environment-friendly gas insulation ring main unit - Google Patents
Upper isolation upper grounding environment-friendly gas insulation ring main unit Download PDFInfo
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- CN113328370B CN113328370B CN202110626881.8A CN202110626881A CN113328370B CN 113328370 B CN113328370 B CN 113328370B CN 202110626881 A CN202110626881 A CN 202110626881A CN 113328370 B CN113328370 B CN 113328370B
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- isolation
- grounding
- circuit breaker
- breaker
- switch
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
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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
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/0354—Gas-insulated switchgear comprising a vacuum switch
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The utility model provides an on keep apart and go up ground connection environmental protection gas insulation looped netowrk cabinet, the switch design is for keeping apart the earthing structure, earthing switch closes the floodgate back still need operate the circuit breaker combined floodgate and just can really accomplish ground connection, the vacuum interrupter of circuit breaker has outstanding closed performance, lower ground structure keeps apart for among the prior art down closes through the isolation sword and closes and produce the arc-drawing easily, burn out the isolation sword, close the relatively poor defect of ability, can effectively avoid the load end to take place short-circuit fault and the harm that switch ground connection closed ability not enough appears.
Description
Technical Field
The invention relates to the technical field of medium-voltage distribution network switch equipment, in particular to an upper isolation upper grounding environment-friendly gas insulation ring main unit.
Background
At present, domestic existing switch cabinets are mainly divided into air insulation ring main units, sf6 gas insulation ring main units, solid insulation ring main units and environment-friendly gas insulation ring main units. The air insulation ring net cabinet is large in volume; SF6 gas insulated ring main units are used most at present, but SF6 is one of the main greenhouse gases; the partial discharge index of the solid insulation ring main unit is unstable, the insulation material is difficult to degrade, and the later-stage recovery processing is difficult; the environment-friendly gas insulation ring main unit mainly comprises two types: the environment-friendly cabinet comprises an insulating environment-friendly cabinet of dry air (N2) and a normal-pressure sealing insulating environment-friendly cabinet. The dry air insulation ring main unit is characterized in that a gas box is vacuumized and then filled with dry air with a certain pressure value, so that the switch cabinet achieves the insulation capacity of the technical requirement, but the problem that the commonly inflated ring main unit is easy to cause gas leakage exists; the sealed insulating environmental protection cabinet of ordinary pressure, filter equipment is equipped with on the box, can effectively keep apart the dust of operational environment, it is moist, filthy, realize the inside and outside voltage-sharing of sealed box simultaneously, although solved the easy problem that takes place gas leakage of looped netowrk cabinet of the type of inflating to a certain extent, nevertheless under the condition of guaranteeing switch insulating ability, its size is compared first kind and can be on the large side, occupation of land space is big, and the structure of these two types of environmental protection cabinets is mostly isolation grounding structure down, to the scheme of the online roadside of earthing switch, short-circuit fault takes place when the load end, under the condition that the interlocking became invalid, operating personnel mistake closes ground, if switch grounding closes the ability not enough, will take place serious accident in switch department.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an upper isolation upper grounding environment-friendly gas insulation ring main unit.
The technical scheme of the invention is as follows:
an upper isolation upper grounding environment-friendly gas insulation ring main unit comprises a switch assembly, a base and a lower door plate, wherein the switch assembly is fixed at the rear upper part of the base; the lower door plate is arranged in front of the base;
the switch assembly includes: a circuit breaker switch, an isolation/grounding mechanism, an interlocking device and a circuit breaker mechanism; the isolation/grounding switch is arranged above the breaker switch and is fixedly connected with the breaker switch;
the breaker switch comprises a vacuum arc extinguish chamber, an over-travel spring assembly, a breaker transmission shaft and a breaker cam, wherein the breaker mechanism is connected with the breaker transmission shaft, the breaker cam is fixed on the breaker transmission shaft, the over-travel spring assembly is connected above the breaker cam, and the vacuum arc extinguish chamber is connected above the over-travel spring assembly;
the isolation/grounding switch comprises an isolation static contact, a crank arm component, an isolation transmission shaft, an isolation moving blade and a grounding contact, wherein the isolation moving blade is positioned between the isolation static contact and the grounding contact, and the isolation transmission shaft is connected with the isolation moving blade through the crank arm component;
the switch assembly further comprises a breaker closing button, an energy storage operating shaft, an energy storage spring, an outer rotating shaft, an interlocking device, a breaker interlocking piece and an isolation interlocking piece, wherein the energy storage operating shaft is connected with the energy storage spring;
and (3) power failure operation:
the switch assembly further comprises a breaker opening button, the breaker opening button is pressed, and (a) the switch acts inside: the circuit breaker mechanism drives a circuit breaker transmission shaft to rotate anticlockwise, a circuit breaker cam fixed on the circuit breaker transmission shaft rotates anticlockwise, an over-travel spring assembly is driven to pull a vacuum arc-extinguishing chamber downwards, contacts in the vacuum arc-extinguishing chamber are separated, and the circuit breaker is opened; (b) the interlocking device acts: the two ends of the dynamic seal of the circuit breaker are respectively connected with a transmission shaft of the circuit breaker and an outer rotating shaft, the transmission shaft of the circuit breaker rotates anticlockwise, so that a cam fixed on the outer rotating shaft rotates anticlockwise, the interlocking piece of the circuit breaker and the interlocking piece of the isolation move downwards, and the shielding part of the isolation operation shaft and the shielding part of the grounding operation shaft do not shield the isolation operation shaft and the grounding operation shaft; an operating handle is inserted into an isolation operating shaft and rotates anticlockwise, an isolation mechanism component on an isolation/grounding mechanism drives an isolation transmission shaft to rotate clockwise, meanwhile, a crank arm component connected with the isolation transmission shaft drives an isolation moving blade to rotate clockwise, the isolation moving blade is separated from an isolation static contact, and an isolation switch is switched off;
an operating handle is inserted into a grounding operating shaft and rotates clockwise, a grounding mechanism component on an isolation/grounding mechanism drives an isolation transmission shaft to rotate clockwise, meanwhile, a crank arm component connected with the isolation transmission shaft drives an isolation moving blade to continue rotating clockwise, the isolation moving blade is connected with a grounding contact, and a grounding switch is switched on;
insert the operating handle energy storage operating axis, clockwise rotation makes the energy storage spring in the circuit breaker mechanism tensile to the setting value, and circuit breaker closing button is pressed to the energy storage of circuit breaker mechanism, and circuit breaker mechanism drives circuit breaker transmission shaft clockwise turning, fixes the clockwise rotation of circuit breaker cam on the circuit breaker transmission shaft, drives the overtravel spring subassembly and upwards promotes vacuum interrupter, and the inside contact of vacuum interrupter closes a floodgate, and the circuit breaker closes a floodgate, and at this moment, the ground circuit of switch is in on-state, and the lower door plant below can be opened.
Preferably, a rotating pressure plate is fixed on the grounding operation shaft, the interlocking device comprises a link rod assembly, a baffle plate matched with the rotating pressure plate is connected to the link rod assembly, and a grounding interlocking piece is fixed at the lower end of the link rod assembly and used for locking the lower door plate;
power transmission operation:
after the lower door plate is closed, a breaker opening button is pressed, the breaker mechanism drives a breaker transmission shaft to rotate anticlockwise, a breaker cam fixed on the breaker transmission shaft rotates anticlockwise, an over-travel spring assembly is driven to pull a vacuum arc extinguish chamber downwards, contacts in the vacuum arc extinguish chamber are separated, and the breaker is opened;
an operating handle is inserted into a grounding operating shaft and rotates anticlockwise, a grounding mechanism component on an isolation/grounding mechanism drives an isolation transmission shaft to rotate anticlockwise, meanwhile, a crank arm component connected with the isolation transmission shaft drives an isolation moving blade to rotate anticlockwise, the isolation moving blade is separated from a grounding contact, and a grounding switch is opened; the grounding operation shaft rotates anticlockwise, the rotating pressing plate fixed on the grounding operation shaft rotates anticlockwise, the baffle on the link rod assembly is pressed downwards, the grounding interlocking sheet fixed on the link rod assembly moves downwards to press the lower door plate, and at the moment, the lower door plate cannot be opened in a shunting state;
an operating handle is inserted into an isolation operating shaft and rotates clockwise, an isolation mechanism component on an isolation/grounding mechanism drives an isolation transmission shaft to rotate anticlockwise, meanwhile, a crank arm component connected with the isolation transmission shaft drives an isolation moving blade to continue rotating anticlockwise, the isolation moving blade is connected with an isolation static contact, and an isolation switch is switched on;
the operating handle is inserted into the energy storage operating shaft and rotates clockwise, so that an energy storage spring on the circuit breaker mechanism is stretched to a set value, and the circuit breaker mechanism stores energy; pressing a closing button of the circuit breaker, (a) performing internal action of the switch: the circuit breaker mechanism drives a circuit breaker transmission shaft to rotate clockwise, a circuit breaker cam fixed on the circuit breaker transmission shaft rotates clockwise, an over-travel spring assembly is driven to push a vacuum arc extinguish chamber upwards, a contact inside the vacuum arc extinguish chamber is switched on, the circuit breaker is switched on, and at the moment, the whole switch loop is in a conducting state; (b) the interlocking device acts: the energy storage spring releases energy, the interlocking on the circuit breaker mechanism pushes the outer rotating shaft to rotate clockwise, the cam fixed on the outer rotating shaft rotates clockwise, the circuit breaker interlocking piece and the isolation interlocking piece are driven to move upwards, and the isolation operation shaft and the grounding operation shaft are blocked.
Preferably, an ejection sleeve is arranged above the switch assembly, and the ejection sleeve is connected with the isolation/grounding switch by a soft bus bar.
Preferably, go up to keep apart and go up ground connection environmental protection gas insulation looped netowrk cabinet and still include the instrument box, the instrument box includes the top cap, and the top cap slope sets up and installs the guiding gutter additional.
Preferably, the circuit breaker transmission shaft of the circuit breaker switch is provided with 4 umbrella skirts, and the umbrella skirts separate the three-phase high-voltage conductive part over-travel spring assembly from the circuit breaker cam.
Preferably, the switch assembly comprises a gas box, the gas box comprises a gas box lower bottom plate, a lower outlet sleeve is arranged below the inside of the gas box, the lower end of the breaker switch is connected with the lower outlet sleeve through a branch bus, a bus voltage-sharing cover and an insulated wire cap are arranged at the joint of the branch bus and the lower outlet sleeve, and the insulated wire cap is arranged outside the bus voltage-sharing cover.
Preferably, the isolation/grounding switch is provided with a three-phase integrated insulating shield, the insulating shield is arranged between the isolation moving knife and the side wall of the air box, the inner side of the insulating shield is provided with corrugations, and the middle of the insulating shield is provided with an insulating partition plate.
Preferably, the link assembly comprises a first link and a second link, and the lower end of the first link is connected with the upper end of the second link through a link adapter plate.
Preferably, the circuit breaker interlocking piece is connected with a rolling copper sleeve, the cam is provided with an arc-shaped long hole matched with the rolling copper sleeve, and the cam and the circuit breaker interlocking piece are in transmission connection through the rolling copper sleeve and the arc-shaped long hole.
Preferably, the circuit breaker interlocking piece and/or the isolation interlocking piece are/is provided with a guide long hole, and a rolling copper sleeve is connected in the guide long hole and used for guiding the circuit breaker interlocking piece and/or the isolation interlocking piece during up-and-down movement.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other solutions can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic view of an assembly of an upper isolation upper grounding environment-friendly gas insulation ring main unit provided by the invention;
fig. 2 is a schematic diagram (front view and left view) of a switch assembly of the upper isolated upper grounded environment-friendly gas insulated ring main unit provided by the invention;
fig. 3 is an assembly schematic diagram (front view, left view) of an isolating/grounding switch and a breaker switch of the upper isolating upper grounding environment-friendly gas insulated ring main unit provided by the invention;
fig. 4-5 show the assembly of the isolating/grounding mechanism, the breaker mechanism and the interlocking device (front view, left view, "breaker, close ground", "breaker, break ground") of the upper isolating upper grounding environment-friendly gas insulated ring main unit provided by the invention;
FIG. 6 is a schematic view of the rolling copper sleeve structure provided by the present invention;
fig. 7 is a schematic structural diagram of an instrument box of the upper isolation upper grounding environment-friendly gas insulation ring main unit provided by the invention;
FIG. 8 is a schematic view of the bus bar voltage-sharing cap and insulated wire cap installation provided by the present invention;
FIG. 9 is a schematic view of the interlock (front, left) and the lower door panel provided by the present invention;
fig. 10 is a schematic view of the structure of the insulation shield provided by the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The technical solution of the present invention will be described in detail with reference to the accompanying drawings in conjunction with embodiments.
An upper isolation upper grounding environment-friendly gas insulation ring main unit, as shown in fig. 1-10, comprises a switch assembly 101, a base 102, and a lower door panel 105, wherein the switch assembly 101 is fixed at the rear upper part of the base 102; the lower door panel 105 is arranged in front of the base 102;
the switch assembly 101 includes: circuit breaker switch 207, isolation/grounding switch 205, isolation/grounding mechanism 212, interlock 213, circuit breaker mechanism 214; the isolating/grounding switch 205 is arranged above the breaker switch 207 and is fixedly connected with the breaker switch;
the breaker switch 207 comprises a vacuum arc extinguish chamber 306, an over travel spring assembly 308, a breaker transmission shaft 310, a breaker cam 311, a breaker mechanism 214 and a breaker transmission shaft 310, wherein the breaker transmission shaft 310 is fixedly provided with the breaker cam 311, the over travel spring assembly 308 is connected above the breaker cam 311, and the vacuum arc extinguish chamber 306 is connected above the over travel spring assembly 308;
the isolating/grounding switch 205 comprises an isolating static contact 301, a crank arm component 302, an isolating transmission shaft 303, an isolating moving blade 304 and a grounding contact 305, wherein the isolating moving blade 304 is positioned between the isolating static contact 301 and the grounding contact 305, and the isolating transmission shaft 303 is connected with the isolating moving blade 304 through the crank arm component 302; the switch assembly 101 further comprises a grounding operation shaft 406, a rotating pressing plate 415 is fixed on the grounding operation shaft 406, the interlocking device 213 comprises a link rod assembly 409, a baffle 702 matched with the rotating pressing plate 415 is connected on the link rod assembly 409, a grounding interlocking piece 410 is fixed at the lower end of the link rod assembly 409, and the grounding interlocking piece 410 is used for locking the lower door panel 105;
the switch assembly 101 further comprises a breaker closing button 402, an energy storage operating shaft 403, an energy storage spring 412, an outer rotating shaft 414, the interlocking device 213 further comprises a breaker interlocking piece 407 and an isolation interlocking piece 401, the energy storage operating shaft 403 is connected with the energy storage spring 412, a cam 408 is fixed on the outer rotating shaft 414, the cam 408 is connected with the breaker interlocking piece 407, the isolation interlocking piece 401 is connected above the breaker interlocking piece 407, and the isolation interlocking piece 401 comprises an isolation operating shaft shielding part and a grounding operating shaft shielding part;
power transmission operation:
after the lower door plate 105 is closed, the breaker opening button 404 is pressed, the breaker mechanism 214 drives the breaker transmission shaft 310 to rotate anticlockwise, the breaker cam 311 fixed on the breaker transmission shaft 310 rotates anticlockwise, the overtravel spring assembly 308 is driven to pull the vacuum arc-extinguishing chamber 306 downwards, the contacts in the vacuum arc-extinguishing chamber 306 are separated, and the breaker is opened;
an operating handle is inserted into the grounding operating shaft 406 and rotates anticlockwise, a grounding mechanism component on the isolating/grounding mechanism 212 drives the isolating transmission shaft 303 to rotate anticlockwise, meanwhile, a crank arm component 302 connected with the isolating transmission shaft 303 drives the isolating movable blade 304 to rotate anticlockwise, the isolating movable blade 304 is separated from the grounding contact 305, and the grounding switch is opened; furthermore, the grounding operation shaft 406 rotates counterclockwise, the rotating pressing plate 415 fixed on the grounding operation shaft 406 rotates counterclockwise, the baffle 702 on the link assembly 409 is pressed downward, the grounding interlocking piece 410 fixed on the link assembly 409 moves downward, the lower door panel 105 is pressed, and at this time, the lower door panel 105 cannot be opened in a grounding state; ensuring that the operator cannot open the lower door panel 105 to access the cable compartment while ungrounded.
An operating handle is inserted into an isolation operating shaft 405 and rotates clockwise, an isolation mechanism component on an isolation/grounding mechanism 212 drives an isolation transmission shaft 303 to rotate anticlockwise, meanwhile, a crank arm component 302 connected with the isolation transmission shaft 303 drives an isolation moving blade 304 to continue rotating anticlockwise, the isolation moving blade 304 is connected with an isolation fixed contact 301, and an isolation switch is switched on;
the operating handle is inserted into the energy storage operating shaft 403, and the operating handle rotates clockwise, so that the energy storage spring 412 on the circuit breaker mechanism is stretched to a set value (for example, a maximum design value), and the circuit breaker mechanism 214 stores energy; pressing the breaker close button 402, (a) switch internal action: the breaker mechanism 214 drives the breaker transmission shaft 310 to rotate clockwise, the breaker cam 311 fixed on the breaker transmission shaft 310 rotates clockwise, the overtravel spring assembly 308 is driven to push the vacuum arc-extinguishing chamber 306 upwards, the contact inside the vacuum arc-extinguishing chamber 306 is switched on, the breaker is switched on, and at the moment, the whole switch loop is in a conducting state; (b) the interlocking device acts: the energy storage spring 412 releases energy, the interlock on the circuit breaker mechanism 214 pushes the outer rotating shaft 414 to rotate clockwise, the cam 408 fixed on the outer rotating shaft 414 rotates clockwise, and the circuit breaker interlocking piece 407 and the isolation interlocking piece 401 are driven to move upwards to block the isolation operating shaft 405 and the grounding operating shaft 406; ensuring that the isolation/grounding switch 205 cannot be operated under load.
And (3) power failure operation:
the switch assembly 101 further comprises a breaker opening button 404, which is pressed to open the breaker button 404, (a) switch internal action: the circuit breaker mechanism 214 drives the circuit breaker transmission shaft 310 to rotate anticlockwise, the circuit breaker cam fixed on the circuit breaker transmission shaft 310 rotates anticlockwise 311, the over travel spring assembly 308 is driven to pull the vacuum arc-extinguishing chamber 306 downwards, contacts in the vacuum arc-extinguishing chamber 306 are separated, and the circuit breaker is opened; (b) the interlocking device acts: the two ends of the circuit breaker dynamic seal 413 are respectively connected with the circuit breaker transmission shaft 310 and the outer rotating shaft 414, and the circuit breaker transmission shaft 310 rotates counterclockwise, so that the cam 408 fixed on the outer rotating shaft 414 rotates counterclockwise, and the circuit breaker interlocking piece 407 and the isolation interlocking piece 401 are driven to move downward; at this point the operational limits of the isolation/ground switch 205 are released.
An operating handle is inserted into an isolation operating shaft 405 and rotates anticlockwise, an isolation mechanism component on an isolation/grounding mechanism 212 drives an isolation transmission shaft 303 to rotate clockwise, meanwhile, a crank arm component 302 connected with the isolation transmission shaft 303 drives an isolation moving blade 304 to rotate clockwise, the isolation moving blade 304 is separated from an isolation static contact 301, and an isolation switch is switched off;
an operating handle is inserted into the grounding operating shaft 406 and rotates clockwise, a grounding mechanism component on the isolating/grounding mechanism 212 drives the isolating transmission shaft 303 to rotate clockwise, meanwhile, a crank arm component 302 connected with the isolating transmission shaft 303 drives the isolating movable blade 304 to continue rotating clockwise, the isolating movable blade 304 is connected with a grounding contact 305, and a grounding switch is switched on;
the operating handle is inserted into the energy storage operating shaft 403, and the operating handle rotates clockwise, so that the energy storage spring 412 on the breaker mechanism is stretched to a set value (for example, the maximum design value), the breaker mechanism stores energy 214, the breaker closing button 402 is pressed, the breaker mechanism 214 drives the breaker transmission shaft 310 to rotate clockwise, the breaker cam 311 fixed on the breaker transmission shaft 310 rotates clockwise, the overtravel spring assembly 308 is driven to push the vacuum arc-extinguishing chamber 306 upwards, the contact inside the vacuum arc-extinguishing chamber 306 is closed, the breaker is closed, at this moment, the grounding loop of the switch is in a conducting state, and the lower door panel 105 can be opened.
Further, the isolation/grounding mechanism 212 includes 2 linkage track disks, which are respectively connected to the isolation operation shaft 405 and the grounding operation shaft 406.
Further, the switch assembly 101 comprises an air box 202, a breaker switch 207 and an isolating/grounding switch 205 are arranged in the air box 202, an ejection sleeve 201 is arranged at the upper end of the air box 202, an explosion-proof device 204 is arranged at the lower end of the air box 202, and an observation window 203 is arranged on the side wall of the air box 202.
Furthermore, the upper isolation upper grounding environment-friendly gas insulation ring main unit further comprises an instrument box 103, and the instrument box 103 is fixed at the upper end of the mechanism chamber 104.
Further, the mechanism chamber 104 are fixed on the upper front of the base 102, and the isolation/grounding mechanism 212, the interlock 213, the breaker mechanism 214 are located in the mechanism chamber 104.
Further, the disconnecting/grounding switch 205 is disposed above the breaker switch 207, and the disconnecting/grounding mechanism 212, the interlock device 213, and the breaker mechanism 214 are disposed on one side of the disconnecting/grounding switch 205 and the breaker switch 207.
The isolation/grounding mechanism and the breaker mechanism are prior art and are not described again.
Further, the link assembly 409 includes a first link 704 and a second link 706, and a lower end of the first link 704 is connected to an upper end of the second link 706 through a link adapter plate 705.
Further, the link assembly 409 further includes a link guide plate 703 sleeved on the second link 706.
Further, the link assembly 409 further includes a spring 701 sleeved on the first link 704, an upper end of the spring 701 is fixedly connected with the baffle 702, and a lower end of the spring 701 may be fixed to a support frame or the like on the ring main unit or an internal structure thereof.
Further, the circuit breaker interlocking piece 407 is connected with a rolling copper sleeve 411, the cam 408 is provided with an arc-shaped long hole matched with the rolling copper sleeve 411, and the cam 408 and the circuit breaker interlocking piece 407 are in transmission connection through the rolling copper sleeve 411 and the arc-shaped long hole.
Further, the circuit breaker interlocking piece 407 and/or the isolation interlocking piece 401 are provided with a guiding long hole, and a rolling copper sleeve is connected in the guiding long hole and used for guiding the circuit breaker interlocking piece 407 and/or the isolation interlocking piece 401 during up-and-down movement.
The energy storage operation shaft can be a cam shaft driven to rotate through a transmission structure such as a gear train, and the cam shaft rotates to drive the energy storage spring to stretch through a crank arm, so that the description is omitted.
Further, an ejection sleeve is arranged above the switch assembly 101, and a soft busbar connection 211 is adopted between the ejection sleeve 201 and the isolation/grounding switch 205.
The meter box 103 includes a meter box main body 504, a door panel 503, and a roof 502, and the roof 502 is provided with a chute 501 in an inclined manner.
Furthermore, the isolation/grounding switch 205 is provided with a three-phase integrated insulation shield 206, the insulation shield 206 is arranged between the isolation moving blade 304 and the side wall 307 of the air tank, the inner side of the insulation shield 206 is provided with corrugations 802 to strengthen the insulation between the isolation moving blade 304 and the side wall 307 of the air tank, meanwhile, the middle of the insulation shield 206 is provided with an insulation partition plate 801 to strengthen the insulation between phases, and the design of the insulation shield 206 greatly reduces the width size and the depth size of the air tank 202.
Furthermore, 4 umbrella skirts 309 are arranged on a breaker transmission shaft 310 of the breaker switch 207, and the umbrella skirts 309 separate the over-travel spring assemblies 308 of the three-phase high-voltage conductive part from the breaker cam 311, so that the phase-to-phase creepage distance is increased, and the depth dimension of the gas tank 202 is reduced.
Further, the gas box 202 comprises a gas box lower bottom plate 601, a lower outlet sleeve 215 is arranged below the inside of the gas box 202, the lower end of the breaker switch 207 is connected with the lower outlet sleeve 215 through a branch bus 208 (phi 20 copper bar bending forming), a bus voltage equalizing cover 209 and an insulated wire cap 210 are arranged at the joint of the branch bus 208 and the lower outlet sleeve 215, the insulated wire cap 210 is arranged on the outer side of the bus voltage equalizing cover 209, an electric field between the high-voltage end branch bus 208 and the low-voltage end gas box lower bottom plate 601 is optimized, and the height size of the gas box 202 is reduced.
In the above embodiment, the clockwise rotation and the counterclockwise rotation are opposite and may be interchanged.
The invention has the advantages that the switch is designed into an upper isolation grounding structure, the grounding can be really completed only by operating the breaker to close after the grounding switch is closed, the vacuum arc extinguish chamber of the breaker has excellent closing performance, and compared with the lower isolation grounding structure in the prior art, the invention has the defects that the arc is easily generated by closing the isolation knife, the isolation knife is burnt, and the closing capability is poor, thereby effectively avoiding the damage caused by the short circuit fault at the load end and the insufficient closing capability of the switch grounding. The ejection sleeve and the isolation/grounding switch are connected by adopting a soft bus bar, so that the ejection sleeve is prevented from being pulled and cracked due to the inflation deformation of the gas tank. The interlocking device is connected by adopting a metal plate, rolling copper sleeves are arranged among the isolation interlocking pieces, the circuit breaker interlocking pieces and the cam, the connection among the components is stable, the five-prevention interlocking is reliable, and safety accidents caused by manual error operation of the switch can be effectively prevented; the interlocking device has simple structure and few transmission parts, correspondingly reduces failure points, greatly reduces failure rate and prolongs service life. The top cap inclination design of instrument case to install the guiding gutter additional, can avoid the secondary component to wet outside moisture drainage to the case after the condensation forms. The composite insulation technology is adopted, a three-phase integrated insulation shield is arranged on the isolation/grounding switch, the inner side of the insulation shield is provided with ripples, insulation between the movable knife and the side wall of the gas tank is enhanced, meanwhile, an insulation partition plate is arranged in the middle of the insulation shield, phase-to-phase insulation is enhanced, and the width size and the depth size of the gas tank are greatly reduced due to the design of the insulation shield. Be equipped with 4 full skirts on circuit breaker switch's the circuit breaker transmission shaft, the full skirt separates three-phase high voltage conductive part over-travel spring subassembly and circuit breaker cam, increases alternate creepage distance, has reduced the degree of depth size of gas tank. The lower end of the breaker switch is connected with the lower outlet sleeve through a branch bus (phi 20 copper bar is bent and formed), and a bus voltage-sharing cover and an insulated wire cap are arranged at the joint of the branch bus and the lower outlet sleeve, so that the electric field between the high-voltage end branch bus and the lower bottom plate of the low-voltage end gas box is optimized, and the height size of the gas box is reduced. The invention can also be used as a normal pressure sealing environment-friendly cabinet, and can meet the insulation capability of the switch under the condition of zero gauge pressure.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. An upper isolation and upper grounding environment-friendly gas insulation ring main unit is characterized by comprising a switch assembly, a base and a lower door plate, wherein the switch assembly is fixed at the rear upper part of the base; the lower door plate is arranged in front of the base;
the switch assembly includes: a circuit breaker switch, an isolation/grounding mechanism, an interlocking device and a circuit breaker mechanism; the isolation/grounding switch is arranged above the breaker switch and is fixedly connected with the breaker switch;
the breaker switch comprises a vacuum arc extinguish chamber, an over-travel spring assembly, a breaker transmission shaft and a breaker cam, wherein the breaker mechanism is connected with the breaker transmission shaft, the breaker cam is fixed on the breaker transmission shaft, the over-travel spring assembly is connected above the breaker cam, and the vacuum arc extinguish chamber is connected above the over-travel spring assembly;
the isolation/grounding switch comprises an isolation static contact, a crank arm component, an isolation transmission shaft, an isolation moving blade and a grounding contact, wherein the isolation moving blade is positioned between the isolation static contact and the grounding contact, and the isolation transmission shaft is connected with the isolation moving blade through the crank arm component;
the switch assembly further comprises a breaker closing button, an energy storage operating shaft, an energy storage spring, an outer rotating shaft, an interlocking device, a breaker interlocking piece and an isolation interlocking piece, wherein the energy storage operating shaft is connected with the energy storage spring;
and (3) power failure operation:
the switch assembly further comprises a breaker opening button, the breaker opening button is pressed, and (a) the switch acts inside: the circuit breaker mechanism drives a circuit breaker transmission shaft to rotate anticlockwise, a circuit breaker cam fixed on the circuit breaker transmission shaft rotates anticlockwise, an over-travel spring assembly is driven to pull a vacuum arc-extinguishing chamber downwards, contacts in the vacuum arc-extinguishing chamber are separated, and the circuit breaker is opened; (b) the interlocking device acts: the two ends of the dynamic seal of the circuit breaker are respectively connected with a transmission shaft of the circuit breaker and an outer rotating shaft, the transmission shaft of the circuit breaker rotates anticlockwise, so that a cam fixed on the outer rotating shaft rotates anticlockwise, the interlocking piece of the circuit breaker and the interlocking piece of the isolation move downwards, and the shielding part of the isolation operation shaft and the shielding part of the grounding operation shaft do not shield the isolation operation shaft and the grounding operation shaft;
an operating handle is inserted into an isolation operating shaft and rotates anticlockwise, an isolation mechanism component on an isolation/grounding mechanism drives an isolation transmission shaft to rotate clockwise, meanwhile, a crank arm component connected with the isolation transmission shaft drives an isolation moving blade to rotate clockwise, the isolation moving blade is separated from an isolation static contact, and an isolation switch is switched off;
an operating handle is inserted into a grounding operating shaft and rotates clockwise, a grounding mechanism component on an isolation/grounding mechanism drives an isolation transmission shaft to rotate clockwise, meanwhile, a crank arm component connected with the isolation transmission shaft drives an isolation moving blade to continue rotating clockwise, the isolation moving blade is connected with a grounding contact, and a grounding switch is switched on;
insert the operating handle energy storage operating axis, clockwise rotation makes the energy storage spring in the circuit breaker mechanism tensile to the setting value, and circuit breaker closing button is pressed to the energy storage of circuit breaker mechanism, and circuit breaker mechanism drives circuit breaker transmission shaft clockwise turning, fixes the clockwise rotation of circuit breaker cam on the circuit breaker transmission shaft, drives the overtravel spring subassembly and upwards promotes vacuum interrupter, and the inside contact of vacuum interrupter closes a floodgate, and the circuit breaker closes a floodgate, and at this moment, the ground circuit of switch is in on-state, and the lower door plant below can be opened.
2. The upper isolated upper grounding environmental protection gas insulated ring main unit according to claim 1,
a rotating pressure plate is fixed on the grounding operation shaft, the interlocking device comprises a link rod assembly, a baffle matched with the rotating pressure plate is connected to the link rod assembly, and a grounding interlocking piece is fixed at the lower end of the link rod assembly and used for locking the lower door plate;
power transmission operation:
after the lower door plate is closed, a breaker opening button is pressed, the breaker mechanism drives a breaker transmission shaft to rotate anticlockwise, a breaker cam fixed on the breaker transmission shaft rotates anticlockwise, an over-travel spring assembly is driven to pull a vacuum arc extinguish chamber downwards, contacts in the vacuum arc extinguish chamber are separated, and the breaker is opened;
an operating handle is inserted into a grounding operating shaft and rotates anticlockwise, a grounding mechanism component on an isolation/grounding mechanism drives an isolation transmission shaft to rotate anticlockwise, meanwhile, a crank arm component connected with the isolation transmission shaft drives an isolation moving blade to rotate anticlockwise, the isolation moving blade is separated from a grounding contact, and a grounding switch is opened; the grounding operation shaft rotates anticlockwise, the rotating pressing plate fixed on the grounding operation shaft rotates anticlockwise, the baffle on the link rod assembly is pressed downwards, the grounding interlocking sheet fixed on the link rod assembly moves downwards to press the lower door plate, and at the moment, the lower door plate cannot be opened in a shunting state;
an operating handle is inserted into an isolation operating shaft and rotates clockwise, an isolation mechanism component on an isolation/grounding mechanism drives an isolation transmission shaft to rotate anticlockwise, meanwhile, a crank arm component connected with the isolation transmission shaft drives an isolation moving blade to continue rotating anticlockwise, the isolation moving blade is connected with an isolation static contact, and an isolation switch is switched on;
the operating handle is inserted into the energy storage operating shaft and rotates clockwise, so that an energy storage spring on the circuit breaker mechanism is stretched to a set value, and the circuit breaker mechanism stores energy; pressing a closing button of the circuit breaker, (a) performing internal action of the switch: the circuit breaker mechanism drives a circuit breaker transmission shaft to rotate clockwise, a circuit breaker cam fixed on the circuit breaker transmission shaft rotates clockwise, an over-travel spring assembly is driven to push a vacuum arc extinguish chamber upwards, a contact inside the vacuum arc extinguish chamber is switched on, the circuit breaker is switched on, and at the moment, the whole switch loop is in a conducting state; (b) the interlocking device acts: the energy storage spring releases energy, the interlocking on the circuit breaker mechanism pushes the outer rotating shaft to rotate clockwise, the cam fixed on the outer rotating shaft rotates clockwise, the circuit breaker interlocking piece and the isolation interlocking piece are driven to move upwards, and the isolation operation shaft and the grounding operation shaft are blocked.
3. The upper isolation upper grounding environmental protection gas insulation ring main unit as claimed in claim 1, wherein an ejection sleeve is arranged above the switch assembly, and the ejection sleeve and the isolation/grounding switch are connected by a soft bus bar.
4. The upper isolated upper grounded environmental protection gas insulated ring main unit as claimed in claim 1, wherein the upper isolated upper grounded environmental protection gas insulated ring main unit further comprises an instrument box, the instrument box comprises a top cover, and the top cover is obliquely arranged and additionally provided with a water chute.
5. The upper isolation upper grounding environment-friendly gas insulation ring main unit as claimed in claim 1, wherein 4 umbrella skirts are provided on the breaker transmission shaft of the breaker switch, and the umbrella skirts separate the three-phase high voltage conductive part overtravel spring assembly from the breaker cam.
6. The upper isolation upper grounding environment-friendly gas insulation ring main unit as claimed in claim 1, wherein the switch assembly comprises a gas box, which comprises a lower bottom plate of the gas box, a lower outlet sleeve is arranged below the inside of the gas box, the lower end of the breaker switch is connected with the lower outlet sleeve through a branch bus, a bus voltage equalizing cover and an insulated wire cap are arranged at the joint of the branch bus and the lower outlet sleeve, and the insulated wire cap is arranged outside the bus voltage equalizing cover.
7. The upper isolation upper grounding environmental protection gas insulation ring main unit according to claim 6, wherein the isolation/grounding switch is provided with a three-phase integrated insulation shield, the insulation shield is arranged between the isolation moving blade and the side wall of the gas tank, the inner side of the insulation shield is provided with corrugations, and the middle of the insulation shield is provided with an insulation partition plate.
8. The upper isolated upper grounded environment-friendly gas insulated ring main unit as claimed in claim 1, wherein the link assembly comprises a first link and a second link, and a lower end of the first link is connected with an upper end of the second link through a link adapter plate.
9. The upper isolation upper grounding environment-friendly gas insulation ring main unit as claimed in claim 1, wherein the circuit breaker interlocking piece is connected with a rolling copper sleeve, the cam is provided with an arc-shaped long hole matched with the rolling copper sleeve, and the cam and the circuit breaker interlocking piece are in transmission connection through the rolling copper sleeve and the arc-shaped long hole.
10. The upper isolation upper grounding environment-friendly gas insulation ring main unit as claimed in claim 1, wherein the circuit breaker interlocking piece and/or the isolation interlocking piece is provided with a guiding long hole, and a rolling copper sleeve is connected in the guiding long hole for guiding the circuit breaker interlocking piece and/or the isolation interlocking piece when the circuit breaker interlocking piece and/or the isolation interlocking piece move up and down.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110626881.8A CN113328370B (en) | 2021-06-04 | 2021-06-04 | Upper isolation upper grounding environment-friendly gas insulation ring main unit |
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| CN202110626881.8A CN113328370B (en) | 2021-06-04 | 2021-06-04 | Upper isolation upper grounding environment-friendly gas insulation ring main unit |
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| CN113328370B true CN113328370B (en) | 2022-03-01 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113824039A (en) * | 2021-10-29 | 2021-12-21 | 国网四川省电力公司眉山供电公司 | Atmospheric-pressure sealed air insulation ring main unit |
| CN114388281B (en) * | 2021-12-14 | 2024-05-10 | 北京四方继保工程技术有限公司 | Circuit breaker and grounding switch linkage mechanism for ring main unit |
| CN114420494B (en) * | 2021-12-15 | 2024-06-11 | 北京双杰电气股份有限公司 | Direct-acting solid cabinet switch |
| CN115602480B (en) * | 2022-12-12 | 2023-02-28 | 石家庄科林电气设备有限公司 | Three-position switch and three-position environment-friendly gas combined electrical appliance ring main unit |
| CN116154666B (en) * | 2023-02-07 | 2023-09-01 | 申恒电力设备有限公司 | Upper isolation upper grounding environment-friendly gas-insulated ring main unit |
| CN117096767B (en) * | 2023-08-08 | 2024-05-14 | 长园电力技术有限公司 | Inflatable high-voltage switch equipment for new energy |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN206135290U (en) * | 2016-09-27 | 2017-04-26 | 长园电力技术有限公司 | Environmental protection gas insulation looped network cabinet |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203631401U (en) * | 2013-09-12 | 2014-06-04 | 袁茂银 | Earthing switch for switch device |
| CN103996990B (en) * | 2014-05-29 | 2016-05-25 | 厦门兴厦控电气有限公司 | A kind of inflating switch cabinet |
| US10672573B1 (en) * | 2019-06-27 | 2020-06-02 | EMA Electromechanis, Inc. | Gas insulated grounding switch |
| CN112053924A (en) * | 2020-09-30 | 2020-12-08 | 信阳奔月电气有限公司 | Multi-station indoor high-voltage vacuum circuit breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206135290U (en) * | 2016-09-27 | 2017-04-26 | 长园电力技术有限公司 | Environmental protection gas insulation looped network cabinet |
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