CN108808708B - Intelligent phase-change switch - Google Patents
Intelligent phase-change switch Download PDFInfo
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- CN108808708B CN108808708B CN201710280778.6A CN201710280778A CN108808708B CN 108808708 B CN108808708 B CN 108808708B CN 201710280778 A CN201710280778 A CN 201710280778A CN 108808708 B CN108808708 B CN 108808708B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The invention relates to the field of low-voltage power supply facilities, and discloses an intelligent phase change switch which is higher in phase change precision, better in reliability, longer in service life and lower in cost. The device comprises a shell, a supporting system, a locking mistake-proofing system, a phase-changing system, a control display system and a tripping system, wherein the shell comprises a rear shell and a front shell, the front side of the rear shell is connected with a support, the front side of the support is connected with a framework, grooves are uniformly arranged in the circumferential direction of the framework, rotating shafts are arranged in the grooves and are connected with a shifting rod, the lower part of the shifting rod is connected with a screw rod, the lower part of the screw rod is connected with a vacuum bubble switch, and a leading-out terminal at the lower part of the vacuum bubble switch is connected with a phase line bus; the upper surface of the framework is connected with a motor fixing plate, a motor is arranged below the motor fixing plate, a coupler is arranged above the motor fixing plate, a first rotating disc is arranged above the coupler, a bearing is arranged at the center of the first rotating disc, the bearing is connected with the fixing shaft, a guide shaft is arranged on the side face of the fixing shaft, and a first locking sheet, a first elastic element and a sliding block are sequentially sleeved on the guide shaft from inside to outside.
Description
Technical Field
The invention relates to the field of low-voltage power supply facilities, in particular to an intelligent phase-change switch.
Background
In a low-voltage power grid, three-phase imbalance means that three-phase currents (or voltages) in a power system have inconsistent amplitudes and the amplitude difference exceeds a specified range. The three-phase imbalance can cause the electric energy loss of a line and a distribution transformer to be increased, the distribution transformer output is reduced, the distribution transformer generates zero-sequence current, the efficiency of the motor is reduced, and the safe operation of electric equipment is influenced. Therefore, in the actual power supply process, the power department distributes single-phase and two-phase loads to three phases as uniformly as possible to keep the three phases balanced; and the use of phase change switches is one of the most common approaches.
The invention discloses an intelligent phase change switch, which is named as an intelligent phase change switch according to the invention creation name of Chinese patent publication No. CN106409623A, published 2017, 02, 15.A.A.A.A.A.A.A.A.A.A.A.A.A.A.A.A.A.B.C. switch comprises a base and four guide rods, wherein three of the guide rods are phase guide rods, the other guide rod is a zero line guide rod, a movable contact is arranged on each guide rod, the guide rods can do axial motion, a stationary contact is arranged on the base, a locking system and an error prevention system are arranged on the base below the guide rods, the locking system comprises a phase line locking slide sheet and a zero line locking slide sheet, and a phase line guiding inclined plane and a phase line locking bayonet are arranged on one side of three vertical phase line locking slide sheets, which faces towards the zero line; the zero line locking slide sheet is provided with a zero line guide inclined plane and a zero line locking bayonet; the mistake proofing system comprises two mistake proofing slide sheets with mistake proofing inclined planes. The defect is that a control display system is not arranged, so that the control operation is inconvenient; the motion precision of the commutation locking mechanism is low; when designing a control program, it is necessary to consider the influence of arc light generated during phase conversion, and the circuit design is complicated and the required cost is high.
Disclosure of Invention
The invention overcomes the defects in the prior art and provides the intelligent phase change switch with higher phase change precision, better reliability, longer service life and lower cost.
In order to solve the technical problems, the invention is realized by the following technical scheme: an intelligent phase-change switch comprises a shell, a supporting system, a locking mistake-proofing system, a phase-change system, a control display system and a tripping system, wherein the shell comprises a rear shell and a front shell, a display operation panel is arranged on the front side of the front shell, and a zero line incoming terminal and a phase line incoming terminal are arranged above the rear shell from right to left; the front side of the rear shell is fixedly connected with a support, a first fixing support plate and a second fixing support plate are arranged above the support, the front side of the support is fixedly connected with a framework, 3 grooves are uniformly formed in the circumferential direction of the framework, a rotating shaft is arranged in each groove, a wire inlet plate is correspondingly arranged below each rotating shaft, each rotating shaft is connected with a driving lever, the lower portion of each driving lever is connected with a screw, the lower portion of each screw is connected with a vacuum bulb switch, and a wire outlet terminal at the lower portion of each vacuum bulb switch is connected with a phase line bus; the upper surface of the framework is fixedly connected with a motor fixing plate, a motor is arranged below the motor fixing plate, a coupler is arranged above the motor fixing plate, a first rotating disc is arranged above the coupler, a first groove is formed in the center of the first rotating disc, a bearing is arranged in the first groove and is connected with a fixed shaft above the bearing, 3 guide holes are uniformly distributed in the circumference of the side surface of the fixed shaft, guide shafts are arranged in the guide holes, a first locking piece, a first elastic element and a sliding block are sequentially sleeved on the guide shafts from inside to outside, and a second locking piece is arranged on the left side surface and the right side surface of the sliding block; the upper end of the fixed shaft sequentially penetrates through the first fixed support plate, the fixed disc, the error-proof sliding sheet and the locking rotary disc from bottom to top; the upper end of the fixed shaft is connected with a pin, the upper end of the pin is provided with a second elastic element which is distributed circumferentially, and the second elastic element is connected with the upper end of the deflector rod; a tripping electromagnetic switch is arranged on the outer side of the fixed disc; wherein:
a zero line outlet terminal is arranged at the right part below the rear shell, and a live line outlet terminal is arranged at the left part below the rear shell;
a control panel is arranged in the front shell;
a first projection is fixed on the edge of the upper surface of the first rotary table, a second groove is symmetrically arranged between the first projection and the first groove, and a second projection is arranged in the second groove;
a return spring is arranged between the second bump and the second groove, and the two bumps are oppositely arranged in the second groove;
the left part and the right part of the locking sheet are symmetrically provided with locking clamping grooves; the upper end of the first locking piece is connected with the extending foot of the first fixed support plate through the fourth elastic element;
a locking buckle is arranged at the position, corresponding to the locking clamping groove, on the second locking sheet;
3 through holes are uniformly distributed in the circumferential direction of the fixed disc, and guide convex blocks are arranged among the through holes;
the anti-error slide sheet consists of 3 anti-error separation sheets distributed circumferentially, two ends of each anti-error separation sheet are respectively provided with an anti-error inclined plane, the middle part of each anti-error separation sheet is provided with an anti-error separation sheet guide groove, and the anti-error inclined plane between every two anti-error separation sheets forms a locking port I;
3 locking guide grooves are uniformly distributed in the circumferential direction of the upper surface of the locking turntable, bulges are arranged in the locking guide grooves, a locking stop opening II is arranged between the locking guide grooves, and a tripping stop opening is arranged at the edge of the locking turntable;
the positions of the guide lug, the mistake-proofing slicing guide groove and the locking guide groove are mutually corresponding;
the through hole, the first locking port and the second locking port correspond to each other in position, and the upper end of the deflector rod penetrates through the through hole, the first locking port and the second locking port;
an elastic element III is arranged between the guide convex block and the bulge;
the tripping electromagnetic switch corresponds to the tripping spigot;
a rotating shaft of the motor is fixedly connected with the coupler;
the vacuum bubble switch is fixedly connected with the framework;
the phase line incoming terminal comprises a phase line incoming terminal A, a phase line incoming terminal B and a phase line incoming terminal C in sequence from left to right;
the wire inlet plate is fixedly connected with the framework and is connected with the upper part of the vacuum bulb switch;
the wire inlet plate is divided into a phase A wire inlet plate, a phase B wire inlet plate and a phase C wire inlet plate;
the phase line incoming terminal A, the phase line incoming terminal B and the phase line incoming terminal C are respectively connected with the phase line incoming board A, the phase line incoming board B and the phase line incoming board C through wires;
the zero line incoming terminal is connected with a zero line, and the lower part of the zero line penetrates through the zero sequence transformer and then is connected with the zero line outgoing terminal;
the phase line bus lines are connected with the zero sequence transformers and then are converged into a live wire to be output, and the live wire penetrates through the current sensor and then is connected with a live wire outlet terminal;
the display operation panel, the zero sequence mutual inductor, the motor, the tripping electromagnetic switch and the current sensor are respectively connected with the control panel.
The motor is a stepping motor and is provided with an encoder, and the encoder is a Hall encoder and can realize the functions of angle positioning and memory by combining a position switch.
The intelligent phase-changing switch has a self-adaptive function, and can automatically judge whether to execute phase changing according to a set voltage unbalance threshold, the detected power grid voltage unbalance and the detected load power.
The display operation panel comprises a time adjusting button, a display screen, a trip indicating lamp, a trip button, a power switch, a reset button and an indicating lamp, a C-phase button and an indicating lamp, a B-phase button and an indicating lamp and an A-phase button and an indicating lamp.
The upper part of the deflector rod is a metal structure part, the lower part of the deflector rod is an insulation structure part, and the metal structure part and the insulation structure part are fixedly connected by rivets; the framework is an insulating framework.
The control panel comprises 3 PCB boards, and is respectively fixedly arranged on three side surfaces in the front shell.
An included angle between the second grooves is 60 degrees; the number of the second elastic elements is 3, and the included angle between the second elastic elements is 120 degrees.
The first elastic element and the third elastic element are compression springs, the second elastic element is an extension spring, and the return spring is a torsion spring; the elastic element four is a compression spring.
And a ball and a check ring are arranged in the sliding block.
The current sensor is of a voltage output type.
Compared with the prior art, the invention has the beneficial effects that: the phase change structure mainly adopts a rotating disc type mechanical structure, so that the phase change structure has higher precision, better reliability and longer service life; a display operation panel is added, so that the control operation of the invention is simpler and more convenient; the vacuum bubble switch is arranged, so that the influence of arc light is not needed to be considered when the phase is changed, the circuit program design is simpler and more reasonable, the phase changing precision of the invention is higher, and the required cost is lower.
Drawings
FIG. 1 is an isometric view of a smart commutation switch;
FIG. 2 is a front view of a smart commutation switch;
FIG. 3 is a top view of an intelligent switch;
FIG. 4 is a bottom view of a smart switch;
FIG. 5 is a schematic diagram of a smart switch with the front housing removed;
FIG. 6 is a front view of a smart switch with the front housing removed;
FIG. 7 is a schematic diagram of an intelligent switch with the front housing removed and a display system controlled;
FIG. 8 is a front view of a smart switch with the front housing removed and a display system controlled;
FIG. 9 is a schematic diagram of an intelligent switch with the housing removed and a display system controlled;
FIG. 10 is a schematic view of an intelligent switch with the housing, control display system, and support system removed;
FIG. 11 is a schematic diagram of an intelligent switch with the housing removed, the control display system, the support system, and the wiring connections;
FIG. 12 is a schematic view of a stent;
FIG. 13 is a schematic view of a scaffold;
FIG. 14 is a schematic view of a stationary shaft;
FIG. 15 is a schematic view of a first turntable and a bearing;
FIG. 16 is a top view of the turntable one and the bearing;
FIG. 17 is a cross-sectional view taken along A-A of FIG. 16;
FIG. 18 is a schematic view of the first locking tab, the second locking tab, and the slider;
FIG. 19 is a schematic view of the second locking tab and the slider;
FIG. 20 is a schematic view of a first locking tab;
FIG. 21 is a schematic view of a second locking tab;
FIG. 22 is a schematic view of the stationary platen, the error-proofing slide and the locking turntable;
FIG. 23 is a schematic view of a holding pan;
FIG. 24 is a schematic view of a tamper proof piece;
FIG. 25 is a schematic view of the locking dial;
fig. 26 is a schematic view of the shift lever.
In the figure, 1 rear shell, 2 front shell, 3 display operation panel, 301 time adjustment button, 302 display screen, 303 trip indicator light, 304 trip button, 305 power switch, 306 reset button and indicator light, 307C button and indicator light, 308B button and indicator light, 309A button and indicator light, 4 zero line incoming terminal, 5 phase incoming terminal, 501A phase incoming terminal, 502B phase incoming terminal, 503C phase incoming terminal, 6 zero line outgoing terminal, 7 live line outgoing terminal, 8 zero line, 9 zero sequence mutual inductor, 10 bracket, 101 fixed support plate one, 102 fixed support plate two, 11 skeleton, 111 groove, 12 motor fixed plate, 13 motor, 14 shaft coupling, 15 turntable one, 1501 groove one, 1502 lug one, 1504 groove two, lug two, 1505 reset spring, 16 bearing, 17 fixed shaft, 1701 guide hole, 18 rotating shaft, 13 motor reset button, 13 rotating shaft, 17 rotating shaft, 1701 rotating shaft, 19 incoming line boards, 1901A incoming line boards, 1902B incoming line boards, 1903C incoming line boards, 20 shift levers, 21 screws, 22 vacuum bubble switches, 23 current sensors, 24 phase bus lines, 25 live lines, 26 control panels, 27 guide shafts, 28 locking piece I, locking clamping grooves 2801, 29 energy storage spring I, 30 sliders, 3001 balls, 3002 retaining rings, 31 locking piece II, 3101 locking buckles, 32 fixed disks, 3201 through holes, 3202 guide lugs, 33 error-proof sliding pieces, 3301 error-proof fragments, 33011 error-proof inclined planes, 33012 error-proof fragment guide grooves, 3302 locking opening I, 34 locking turntables, 3401 locking guide grooves, 3402 spring protrusions, 3403 locking opening II, 3404 tripping opening, 35 pins, 36 elastic elements II, 37 elastic elements III, 38 tripping electromagnetic switches and 39 elastic elements IV.
Detailed Description
The invention is described in further detail below with reference to the following detailed description and accompanying drawings: as shown in fig. 1 to 19, an intelligent phase-change switch comprises a housing, a supporting system, a locking error-proofing system, a phase-change system, a control display system and a tripping system, wherein the housing comprises a rear housing 1 and a front housing 2, a display operation panel 3 is arranged on the front side of the front housing 2, and a zero line incoming terminal 4 and a phase line incoming terminal 5 are arranged above the rear housing 1 from right to left; the front side of the rear shell 1 is fixedly connected with a bracket 10, a first fixing support plate 101 and a second fixing support plate 102 are arranged above the bracket 10, the front side of the bracket 10 is fixedly connected with a framework 11, 3 grooves 111 are uniformly arranged in the circumferential direction of the framework 11, a rotating shaft 18 is respectively arranged in each groove 111, a wire inlet plate 19 is correspondingly arranged below each rotating shaft 18, each rotating shaft 18 is connected with a deflector rod 20, the lower part of each deflector rod 20 is connected with a screw rod 21, the lower part of each screw rod 21 is connected with a vacuum bubble switch 22, and a wire outlet terminal at the lower part of each vacuum bubble switch 22 is connected with a phase wire bus 24; the upper surface of the framework 11 is fixedly connected with a motor fixing plate 12, a motor 13 is arranged below the motor fixing plate 12, a coupler 14 is arranged above the motor fixing plate 12, a first rotating disc 15 is arranged above the coupler 14, a first groove 1501 is formed in the center of the first rotating disc 15, a bearing 16 is arranged in the first groove 1501, the bearing 16 is connected with a fixing shaft 17 above the bearing, 3 guide holes 1701 are uniformly distributed on the circumference of the side surface of the fixing shaft 17, a guide shaft 27 is arranged in the guide holes 1701, a first locking piece 28, a first elastic element 29 and a sliding block 30 are sequentially sleeved on the guide shaft 27 from inside to outside, and a second locking piece 31 is arranged on the left side surface and the right side surface of the sliding block 30; the upper end of the fixed shaft 17 sequentially penetrates through a first fixed support plate 101, a fixed disc 32, a mistake-proofing slide sheet 33 and a locking turntable 34 from bottom to top; the upper end of the fixed shaft 27 is connected with a pin 35, the upper end of the pin 35 is provided with a second elastic element 36 which is distributed circumferentially, and the second elastic element 36 is connected with the upper end of the shift lever 20; a tripping electromagnetic switch 38 is arranged on the outer side of the fixed disc 32; wherein:
a zero line outlet terminal 6 is arranged at the right part below the rear shell 1, and a live line outlet terminal 7 is arranged at the left part below the rear shell 1;
a control panel 26 is arranged inside the front shell 2;
a first bump 1502 is fixed on the edge of the upper surface of the first rotating disc 15, a second groove 1503 is symmetrically arranged between the first bump 1502 and the first groove 1501, and a second bump 1504 is arranged in the second groove 1503; a return spring 1505 is arranged between the second projection 1504 and the second groove 1503, and the two second projections 1504 are oppositely arranged in the second groove 1503 as shown in fig. 15 to 17;
the left part and the right part of the first locking sheet 28 are symmetrically provided with locking clamping grooves 2801; the upper end of the first locking sheet 28 is connected with the extending foot of the first fixed support plate 101 through the fourth elastic element 39; (ii) a A locking buckle 3101 is arranged on the second locking piece 31 at a position corresponding to the locking clamping groove 2801, as shown in fig. 18 to 21;
3 through holes 3201 are uniformly distributed in the circumferential direction of the fixed disc 32, and guide convex blocks 3202 are arranged among the through holes 3201; the error-proof sliding sheet 33 is composed of 3 error-proof sub-sheets 3301 distributed circumferentially, two ends of each error-proof sub-sheet 3301 are respectively provided with an error-proof inclined surface 33011, the middle part of each error-proof sub-sheet 3301 is provided with an error-proof sub-sheet guide groove 33012, and the error-proof inclined surface 33011 between every two error-proof sub-sheets 3301 forms a locking opening 3302; 3 locking guide grooves 3401 are uniformly distributed on the circumferential direction of the upper surface of the locking turntable 34, protrusions 3402 are arranged in the locking guide grooves 3401, a locking notch II 3403 is arranged between the locking guide grooves 3401, and a tripping notch 3404 is arranged at the edge of the locking turntable 34; the positions of the guide projection 3202, the mistake-proofing piece-dividing guide groove 33012 and the locking guide groove 3401 correspond to each other; the through hole 3201, the first locking port 3302 and the second locking port 3403 are arranged correspondingly, and the upper end of the shift lever 20 penetrates through the through hole 3201, the first locking port 3302 and the second locking port 3403; an elastic element III 37 is arranged between the guide convex block 3202 and the bulge 3402, as shown in FIGS. 22 to 25;
the trip electromagnetic switch 38 corresponds to the trip stop 3404 in position;
a rotating shaft of the motor 13 is fixedly connected with a coupling 14;
the vacuum bubble switch 22 is fixedly connected with the framework 11;
the phase line incoming terminal 5 is sequentially an A phase line incoming terminal 501, a B phase line incoming terminal 502 and a C phase line incoming terminal 503 from left to right;
the wire inlet plate 19 is fixedly connected with the framework 11 and is connected with the upper part of the vacuum bulb switch 22;
the wire inlet plate 19 is divided into an A-phase wire inlet plate 1901, a B-phase wire inlet plate 1902 and a C-phase wire inlet plate 1903;
the phase line incoming terminal 501, the phase line incoming terminal 502 and the phase line incoming terminal 503 are respectively connected with the phase line board 1901, the phase line board 1902 and the phase line board 1903 through wires;
the zero line inlet terminal 4 is connected with a zero line 8, and the lower part of the zero line 8 passes through a zero sequence transformer 9 and then is connected with a zero line outlet terminal 6;
each phase line bus wire 24 is connected into the zero sequence transformer 9 and then is converged into a live wire 25 to be output, and the live wire 25 passes through the current sensor 23 and then is connected with a live wire outlet terminal 7;
the display operation panel 3, the zero sequence transformer 9, the motor 13, the trip electromagnetic switch 38 and the current sensor 23 are respectively connected with the control panel 26.
The motor 13 is a stepping motor and is provided with an encoder, and the encoder is a Hall encoder and can realize the functions of angle positioning and memory by combining a position switch.
The intelligent phase-changing switch has a self-adaptive function, and can automatically judge whether to execute phase changing according to a set voltage unbalance threshold, the detected power grid voltage unbalance and the detected load power.
The display operation panel 3 includes a time adjustment button 301, a display screen 302, a trip indicator lamp 303, a trip button 304, a power switch 305, a reset button and indicator lamp 306, a C-phase button and indicator lamp 307, a B-phase button and indicator lamp 308, and an a-phase button and indicator lamp 309, as shown in fig. 2.
The upper part of the deflector rod 20 is a metal structure part, the lower part of the deflector rod is an insulation structure part, and the metal structure part and the insulation structure part are fixedly connected by rivets; the bobbin 11 is an insulating bobbin, as shown in fig. 26.
The control panel 26 is composed of 3 PCB boards and is respectively fixedly mounted on three sides inside the front case 1.
An included angle between the second grooves 1503 is 60 degrees; the number of the second elastic elements 36 is 3, and the included angle between the second elastic elements 6 is 120 degrees.
The first elastic element 29 and the third elastic element 37 are compression springs, the second elastic element 36 is an extension spring, and the return spring 1505 is a torsion spring; the elastic element four 39 is a compression spring.
The slider 30 is provided with balls 3001 and retaining rings 3002 therein, as shown in fig. 18 to 19.
The current sensor 23 is of a voltage output type.
In the invention, the supporting system comprises a bracket 10 and a framework 11, and provides positioning and supporting functions for components such as a motor 13, a vacuum bubble switch 22, a deflector rod 20, a fixed shaft 17, a fixed disc 32 and the like; the tripping system consists of a tripping electromagnetic switch 38 and a locking rotary disc 34, an armature of the tripping electromagnetic switch 38 acts to push the locking rotary disc 34 to rotate, the driving lever 20 is separated from the second locking opening 3403, and the tripping electromagnetic switch 38 is powered off;
in the invention, the sliding block 30 can slide along the guide shaft 27 under the thrust action of the first elastic element 29 and the first bump 1502, when the sliding block 30 slides to the innermost position, the first elastic element 29 can store energy, the locking buckle 3101 of the second locking sheet 31 enters the locking clamping groove 2801 of the first locking sheet 28, and the sliding block 30 is locked;
in the invention, when the upper end of the deflector rod 20 is positioned in the first locking port 3302 and the second locking port 3403, the second elastic element 36 is stretched, the phase line is conducted at the moment, and the other two phase lines are disconnected; at this time, when the upper end of the shift lever 20 corresponding to any one of the other two phases of lines is to enter the conducting position, the upper end is blocked by the error-proof inclined plane 33011, so the error-proof sliding sheet 33 can have the error-proof effect.
In the invention, the balls 3001 arranged in the slide block 30 reduce the friction between the slide block 30 and the guide shaft 27;
in an initial state, the upper end of a deflector rod 20 is positioned at the innermost side of a second locking port 3403, three ABC phases are in a disconnected state, and a moving contact and a static contact in a vacuum bubble switch 22 are separated;
the phase change actions that can be realized by the invention are divided into six types: a → B, A → C, B → A, B → C, C → A, C → B; the phase inversion process will be described below with reference to A → B, A → C as specific examples.
When the phase A is conducted, the upper end of the corresponding driving lever 20 of the phase A is positioned in the second locking opening 3403 of the locking turntable 34, the second elastic element 36 is in a stretching energy storage state, and the first elastic element 29 pushes the sliding block 30 to slide to the outermost position along the guide shaft 27.
When the highest phase voltage of the B phase is detected, the control panel 26 judges that the conduction is correspondingly switched to the B phase, the control panel 26 sends an instruction to the motor 13, the motor 13 rotates 120 degrees anticlockwise, the first bump 1502 on the first rotary disc 15 pushes the sliding block 30 on the corresponding guide shaft 27 of the A phase to slide to the innermost position, the first elastic element 29 stores energy, the locking buckle 3101 of the second locking piece 31 enters the locking clamping groove 2801 of the first locking piece 28, and the sliding block 30 is locked; the lug II 1504 pushes the locking piece I28 corresponding to the phase B to move upwards, the locking buckle 3101 is separated from the locking clamping groove 2801, the elastic element I29 pushes the sliding block 30 to slide outwards along the guide shaft 27, the sliding block 30 pushes the phase B shifting rod 20 to slide outwards, the upper end of the shifting rod 20 passes through the inclined plane of the locking turntable 34 to push the locking turntable 34 to rotate anticlockwise, after the locking turntable 34 rotates to a specific angle, the phase A locking port II 3403 is separated from the upper end of the phase A shifting rod 20, the phase A shifting rod 20 resets under the tension of the elastic element II 36, and the phase A circuit is disconnected; in the very short time when the phase A is disconnected, the upper end of the B-phase deflector rod 20 enters the second locking opening 3403, the second elastic element 36 stretches to store energy, and the phase B is connected. The time interval between the phase A being off and the phase B being on is 10-20 ms.
When the highest phase voltage of the C phase is detected, the control panel 26 judges that the conduction is correspondingly switched to the C phase, the control panel 26 sends an instruction to the motor 13, the motor 13 rotates 120 degrees clockwise, the first bump 1502 on the first rotary disc 15 pushes the sliding block 30 on the corresponding guide shaft 27 of the A phase to slide to the innermost position, the first elastic element 29 stores energy, the locking buckle 3101 of the second locking piece 31 enters the locking clamping groove 2801 of the first locking piece 28, and the sliding block 30 is locked; the lug II 1504 pushes the locking piece I28 corresponding to the phase C to move upwards, the locking buckle 3101 is separated from the locking clamping groove 2801, the elastic element I29 pushes the sliding block 30 to slide outwards along the guide shaft 27, the sliding block 30 pushes the phase C shifting rod 20 to slide outwards, the upper end of the shifting rod 20 passes through the inclined plane of the locking turntable 34 to push the locking turntable 34 to rotate clockwise, after the locking turntable 34 rotates to a specific angle, the phase A locking port II 3403 is separated from the upper end of the phase A shifting rod 20, the phase A shifting rod 20 resets under the tension of the elastic element II 36, and the phase A circuit is disconnected; in the very short time when the phase A is disconnected, the upper end of the C-phase deflector rod 20 enters the second locking opening 3403, the second elastic element 36 stretches to store energy, and the phase C is connected. The time interval between the phase A being off and the phase C being on is 10-20 ms.
The trip protection process of the invention: when the power switch 305 is turned on, the intelligent commutation switch is powered on, the control system starts to detect the voltage of each phase line, the output current of the live line and the zero sequence current of the output end of ABC, if any one of the data of the power voltage, the output current and the zero sequence current of the output end exceeds a preset threshold value, the control panel 26 controls the tripping electromagnetic switch 38 to be powered on, the armature of the tripping electromagnetic switch 38 pushes the locking turntable, the corresponding deflector rods 20 of all the phases are reset, and the switch is powered off. In addition, a manual power-off operation may also be performed.
The error-proofing process in the phase-changing process is briefly described below with phase-a conduction as the initial state: if the BC-phase shift lever 20 moves outwards at the same time in the phase change process, when the upper end of the BC-phase shift lever 20 passes through the error-proof inclined plane 33011 of the error-proof segment 3301, the two error-proof segments 3301 contacting the upper end of the BC-phase shift lever 20 rotate in opposite directions, but at this time, the upper end of the a-phase shift lever 20 is located in the first locking opening 3302, so that the locking slide sheet 34 cannot rotate, and therefore the BC-phase shift lever cannot enter the conducting position.
The invention can set the threshold value of the voltage unbalance degree and automatically judge whether to execute phase change according to the detected power grid voltage unbalance degree and the power of the switch load.
The technical features of the present invention that are not described can be implemented by or using the prior art, and are not described herein again, of course, the above-mentioned embodiments are not limited to the present invention, and the present invention is not limited to the above-mentioned embodiments, and variations, modifications, additions or substitutions that are made by a person of ordinary skill in the art within the spirit and scope of the present invention should also fall within the protection scope of the present invention.
Claims (8)
1. An intelligent phase-change switch comprises a shell, a supporting system, a locking mistake-proofing system, a phase-change system, a control display system and a tripping system, and is characterized in that the shell comprises a rear shell (1) and a front shell (2), a display operation panel (3) is arranged on the front side of the front shell (2), and a zero line incoming terminal (4) and a phase line incoming terminal (5) are arranged above the rear shell (1) from right to left; the front side of the rear shell (1) is fixedly connected with a support (10), a first fixing support plate (101) and a second fixing support plate (102) are arranged above the support (10), the front side of the support (10) is fixedly connected with a framework (11), 3 grooves (111) are uniformly arranged in the circumferential direction of the framework (11), a rotating shaft (18) is respectively arranged in each groove (111), a wire inlet plate (19) is correspondingly arranged below the rotating shaft (18), the rotating shaft (18) is connected with a deflector rod (20), the lower part of the deflector rod (20) is connected with a screw rod (21), the lower part of the screw rod (21) is connected with a vacuum bubble switch (22), and a wire outlet terminal at the lower part of the vacuum bubble switch (22) is connected with a phase line collector (24); the upper surface of the framework (11) is fixedly connected with a motor fixing plate (12), a motor (13) is arranged below the motor fixing plate (12), a coupler (14) is arranged above the motor fixing plate (12), a first rotating disc (15) is arranged above the coupler (14), a first groove (1501) is formed in the center of the first rotating disc (15), a bearing (16) is arranged in the first groove (1501), the bearing (16) is connected with a fixing shaft (17) above the bearing, 3 guide holes (1701) are uniformly distributed on the circumference of the side surface of the fixing shaft (17), a guide shaft (27) is arranged in the guide holes (1701), a first locking piece (28), a first elastic element (29) and a second locking piece (31) are sequentially sleeved on the guide shaft (27) from inside to outside, and a second locking piece (31) is arranged on the left side surface and the right side surface of the second sliding block (30); the upper end of the fixed shaft (17) sequentially penetrates through the first fixed support plate (101), the fixed disc (32), the error-proof sliding sheet (33) and the locking rotary disc (34) from bottom to top; the upper end of the fixed shaft (17) is connected with a pin (35), a second elastic element (36) which is distributed circumferentially is arranged at the upper end of the pin (35), and the second elastic element (36) is connected with the upper end of the deflector rod (20); a tripping electromagnetic switch (38) is arranged on the outer side of the fixed disc (32); wherein:
a zero line outlet terminal (6) is arranged at the right part below the rear shell (1), and a fire line outlet terminal (7) is arranged at the left part below the rear shell (1);
a control panel (26) is arranged in the front shell (2);
a first bump (1502) is fixed on the edge of the upper surface of the first rotating disc (15), a second groove (1503) is symmetrically arranged between the first bump (1502) and the first groove (1501), and a second bump (1504) is arranged in the second groove (1503);
a return spring (1505) is arranged between the second convex block (1504) and the second groove (1503), and the two second convex blocks (1504) are oppositely arranged in the second groove (1503);
the left and right parts of the first locking sheet (28) are symmetrically provided with locking clamping grooves (2801), and the upper end of the first locking sheet (28) is connected with the extending foot of the first fixed support plate (101) through a fourth elastic element (39);
a locking buckle (3101) is arranged on the second locking sheet (31) at a position corresponding to the locking clamping groove (2801);
3 through holes (3201) are uniformly distributed in the circumferential direction of the fixed disc (32), and guide convex blocks (3202) are arranged among the through holes (3201);
the anti-error slide plate (33) is composed of 3 anti-error sub-plates (3301) distributed circumferentially, two ends of each anti-error sub-plate (3301) are respectively provided with an anti-error inclined surface (33011), the middle part of each anti-error sub-plate (3301) is provided with an anti-error sub-plate guide groove (33012), and the anti-error inclined surface (33011) between every two anti-error sub-plates (3301) forms a locking opening I (3302);
3 locking guide grooves (3401) are uniformly distributed in the circumferential direction of the upper surface of the locking turntable (34), protrusions (3402) are arranged in the locking guide grooves (3401), a second locking port (3403) is arranged between the locking guide grooves (3401), and a tripping locking port (3404) is arranged at the edge of the locking turntable (34);
the positions of the guide projection (3202), the mistake-proofing slicing guide groove (33012) and the locking guide groove (3401) correspond to each other;
the through hole (3201), the first locking port (3302) and the second locking port (3403) correspond to each other in position, and the upper end of the shift lever (20) penetrates through the through hole (3201), the first locking port (3302) and the second locking port (3403);
an elastic element III (37) is arranged between the guide convex block (3202) and the bulge (3402);
the tripping electromagnetic switch (38) corresponds to the position of a tripping stop opening (3404);
a rotating shaft of the motor (13) is fixedly connected with the coupling (14);
the vacuum bubble switch (22) is fixedly connected with the framework (11);
the phase line incoming terminal (5) is sequentially provided with an A phase line incoming terminal (501), a B phase line incoming terminal (502) and a C phase line incoming terminal (503) from left to right;
the wire inlet plate (19) is fixedly connected with the framework (11) and is connected with the upper part of the vacuum bulb switch (22);
the wire inlet plate (19) is divided into an A-phase wire inlet plate (1901), a B-phase wire inlet plate (1902) and a C-phase wire inlet plate (1903);
the phase line incoming terminal (501), the phase line incoming terminal (502) and the phase line incoming terminal (503) are respectively connected with the phase line incoming board (1901), the phase line incoming board (1902) and the phase line incoming board (1903) through leads;
the zero line incoming terminal (4) is connected with a zero line (8), and the lower part of the zero line (8) passes through a zero sequence transformer (9) and then is connected with a zero line outgoing terminal (6);
each phase line bus (24) is connected into a zero sequence transformer (9) and then is converged into a live wire (25) to be output, and the live wire (25) penetrates through a current sensor (23) and then is connected with a live wire outlet terminal (7); the current sensor (23) is of a voltage output type;
the display operation panel (3), the zero sequence transformer (9), the motor (13), the tripping electromagnetic switch (38) and the current sensor (23) are respectively connected with the control panel (26).
2. An intelligent commutation switch according to claim 1, wherein the motor (13) is a stepper motor with an encoder, the encoder being a hall encoder, the encoder being capable of performing angular positioning and memory functions in conjunction with a position switch.
3. A smart commutation switch as claimed in claim 2, wherein the smart commutation switch has an adaptive function, which automatically determines whether to perform commutation according to a set voltage imbalance threshold, and the detected grid voltage imbalance and load power.
4. The intelligent phase-change switch according to any one of claims 1 to 3, wherein the display operation panel (3) comprises a time adjustment button (301), a display screen (302), a trip indicator light (303), a trip button (304), a power switch (305), a reset button and indicator light (306), a phase C button and indicator light (307), a phase B button and indicator light (308), and a phase A button and indicator light (309).
5. The intelligent phase-change switch according to claim 4, wherein the upper part of the deflector rod (20) is a metal structure part, the lower part of the deflector rod is an insulation structure part, and the metal structure part and the insulation structure part are fixedly connected by rivets; the framework (11) is an insulating framework.
6. A smart commutation switch as claimed in claim 5, wherein the control panel (26) comprises 3 PCBs and is fixedly mounted on each of three sides of the interior of the front housing (2).
7. The intelligent phase-change switch of claim 6, wherein the included angle between the two second grooves (1503) is 60 degrees; the number of the second elastic elements (36) is 3, and the included angle between the second elastic elements (36) is 120 degrees.
8. The intelligent phase-change switch of claim 7, wherein the first elastic element (29) and the third elastic element (37) are compression springs, and the second elastic element (36) is a tension spring; the return spring (1505) is a torsion spring; the elastic element four (39) is a compression spring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710280778.6A CN108808708B (en) | 2017-04-26 | 2017-04-26 | Intelligent phase-change switch |
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| CN201710280778.6A CN108808708B (en) | 2017-04-26 | 2017-04-26 | Intelligent phase-change switch |
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| CN108808708A CN108808708A (en) | 2018-11-13 |
| CN108808708B true CN108808708B (en) | 2021-08-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112992564B (en) * | 2019-12-17 | 2023-11-28 | 北京京人电器有限公司 | Phase change switch |
| CN113539708B (en) * | 2020-04-15 | 2022-10-11 | 天津首瑞智能电气有限公司 | Phase-change switch |
| CN114050637A (en) * | 2021-10-15 | 2022-02-15 | 国网浙江省电力有限公司嘉善县供电公司 | Medium-low voltage distribution network power-dazzling fault coordination control system |
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| JP5535323B2 (en) * | 2009-09-29 | 2014-07-02 | 湖北盛佳▲電▼器▲設備▼有限公司 | Built-in intelligent circuit breaker and micro circuit breaker with automatic switching-in function |
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| EP1869688B1 (en) * | 2006-01-31 | 2010-08-11 | Eaton Industries GmbH | Multi-pole switching device with an additional housing and a mutual mechanical locking apparatus |
| CN105914763A (en) * | 2016-05-23 | 2016-08-31 | 江苏华奥科自动化技术有限公司 | Novel intelligent phase change switch and method for distribution network |
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