An intelligent automatic transfer switch

Abstract

The present application relates to an intelligent automatic transfer switch, which includes a common-end circuit breaker for connecting to a common power source, a switch controller, and a backup-end circuit breaker for connecting to a backup power source, both of which are connected to the switch controller. The switch controller includes a controller circuit board, a mechanical interlocking device for limiting the simultaneous closing of the common-end circuit breaker and the backup-end circuit breaker, and a controller housing covering the controller circuit board. The controller circuit board is provided with two circuit breaker signal interfaces, which are respectively connected to the common-end circuit breaker and the backup-end circuit breaker. The mechanical interlocking device is respectively connected to the common-end circuit breaker and the backup-end circuit breaker. The present application can effectively prevent the phenomenon of two circuit breakers being closed simultaneously due to misoperation, improve the safety of dual-power supply electricity use, and effectively improve the efficiency of dual-power supply switching and improve the safety of electricity use.

Description

Technical Field

[0001] The present application relates to the field of automatic transfer switches, and in particular to an intelligent automatic transfer switch. Background Art

[0002] As the name suggests, a dual-power automatic transfer switch automatically switches to a backup power source in the event of a sudden power outage, ensuring continued operation without interruption. Simply put, a dual-power automatic transfer switch provides one main power source and one backup power source. In the event of a sudden power outage or failure in the primary power source, the dual-power transfer switch automatically switches to the backup power source (which can also be powered by a generator under low loads), allowing equipment to continue operating normally. It's most commonly used in elevators, fire protection, and surveillance systems. Banks also use UPS uninterruptible power supplies, but their backup power is a battery pack.

[0003] Chinese patent publication number CN113161173A discloses a dual-power automatic transfer switch, comprising a contact assembly, a switching assembly, a primary power microswitch, a backup power microswitch, a logic interlock circuit, and a controller. The switching assembly controls the closing of either the primary power microswitch or the backup power microswitch when switching power sources. The logic interlock circuit includes a primary power closing control circuit and a backup power closing control circuit. The primary power closing control circuit and the backup power closing control circuit are electrically connected to the controller and the switching assembly, respectively, for controlling the switching assembly to switch to the other normal power source when one power source fails. The backup power microswitch is connected in series to the primary power closing control circuit, and the primary power microswitch is connected in series to the backup power closing control circuit. This application utilizes two microswitches positioned adjacent to the switching assembly, combined with a logic interlock circuit, to protect the normal operation of the switching assembly. However, using only the logic interlock circuit to interlock the primary power microswitch and the backup power microswitch can easily lead to simultaneous closing of both power sources due to misoperation, posing a potential electrical safety hazard.

[0004] Regarding the above-mentioned related technologies, the inventor believes that the existing dual-power automatic transfer switch only uses a logic interlock circuit to interlock the common power microswitch and the backup power microswitch, which is prone to the phenomenon of simultaneous closing of the two power supplies due to misoperation, posing a safety hazard to electricity use. Summary of the Invention

[0005] In order to improve the problem that the existing dual power automatic transfer switch only uses a logic interlock circuit to interlock the common power micro switch and the backup power micro switch, which is prone to the phenomenon of simultaneous closing of dual power supplies due to misoperation, posing a potential safety hazard in electricity use, the present application provides an intelligent automatic transfer switch.

[0006] In a first aspect, the present application provides an intelligent automatic transfer switch, which adopts the following technical solution:

[0007] An intelligent automatic transfer switch includes a normal-end circuit breaker for connecting to a normal power source, a switch controller, and a standby-end circuit breaker for connecting to a standby power source, which are arranged in sequence. The normal-end circuit breaker and the standby-end circuit breaker are both connected to the switch controller. The switch controller includes a controller circuit board, a mechanical interlocking device for limiting the simultaneous closing of the normal-end circuit breaker and the standby-end circuit breaker, and a controller housing covering the controller circuit board. The controller circuit board is provided with two circuit breaker signal interfaces, and the two circuit breaker signal interfaces are respectively connected to the normal-end circuit breaker and the standby-end circuit breaker. The mechanical interlocking device is respectively connected to the normal-end circuit breaker and the standby-end circuit breaker.

[0008] By adopting the above technical solution, automatic switching between the normal power supply and the backup power supply is achieved through the setting of the switch controller, ensuring that the electrical appliances can operate stably, thereby effectively improving the stability of power consumption; through the setting of the mechanical interlocking device, after the normal end circuit breaker or the backup end circuit breaker is closed, the mechanical interlocking device locks the other circuit breaker so that it cannot be closed, avoiding the phenomenon of two circuit breakers being closed at the same time due to misoperation, improving the safety of dual power supply power consumption, and effectively improving the efficiency of dual power supply switching and improving the safety of power consumption.

[0009] Preferably, the common-end circuit breaker and the standby-end circuit breaker have the same structure, and both include a circuit breaker housing, a three-phase electrical connection terminal, a three-phase electrical outlet terminal, a closing assembly for controlling the connection and disconnection of the three-phase electrical connection terminal and the three-phase electrical outlet terminal, a traction rod and a tripping assembly, the three-phase electrical connection terminal and the three-phase electrical outlet terminal are both connected to the closing assembly, and the closing assembly and the tripping assembly are both connected to the traction rod.

[0010] By adopting the above technical solution, the setting of the closing component can facilitate the effective control of the on and off of the circuit breaker. At the same time, through the setting of the traction rod and the tripping component, the closing component can be limited and controlled, so that the closing component can be reset in time when abnormal power consumption occurs, avoiding the occurrence of accidental power consumption accidents, and effectively improving the safety of power consumption.

[0011] Preferably, the closing assembly includes a knife switch shaft, an operating mechanism for driving the knife switch shaft to rotate and three knife switch holders, three knife switch pieces are arranged in sequence along the length direction of the knife switch shaft, the three knife switch pieces are connected to the three-phase electrical connection terminals, the three knife switch holders are connected to the three-phase electrical outlet terminals, the ends of the three knife switch pieces are provided with moving contacts, the three knife switch holders are provided with static contacts, and when the three knife switch pieces and the knife switch holders are closed, the three-phase electrical connection terminals and the three-phase electrical outlet terminals are connected; the three knife switch holders are provided with arc extinguishing components.

[0012] By adopting the above technical solution and setting up the closing assembly, when it is necessary to close the circuit breaker so that the three-phase electricity is connected, the operating mechanism drives the knife switch shaft to rotate, so that the three knife switch pieces are respectively inserted into the three knife switch holders, and the moving contact pieces on the knife switch pieces abut against the static contact pieces on the knife switch holders, so that the circuit is turned on; in addition, by setting up the arc extinguishing component, the arc caused by poor contact between the moving contact piece and the static contact piece or other unexpected factors can be extinguished and diverted, thereby further effectively improving the safety of electricity use.

[0013] Preferably, the mechanical interlocking device includes a common end rotary disc, a standby end rotary disc and a four-bar linkage assembly, wherein the common end rotary disc and the standby end rotary disc are coaxially rotatable and arranged on the controller housing; a common end limit rod for limiting the closing of the common end circuit breaker is provided on the side of the common end rotary disc close to the common end circuit breaker, and a standby end limit rod for limiting the closing of the standby end circuit breaker is provided on the side of the standby end rotary disc close to the standby end circuit breaker; the controller housing, the circuit breaker housing of the common end circuit breaker and the circuit breaker housing of the standby end circuit breaker are connected to each other. A first arc-shaped waist-shaped hole is provided on the shell in the horizontal direction, one end of the common end limit rod passes through the first arc-shaped waist-shaped hole and extends into the common end circuit breaker and is located on one side of the traction rod in the common end circuit breaker, and one end of the standby end limit rod passes through the first arc-shaped waist-shaped hole and extends into the standby end circuit breaker and is located on one side of the traction rod in the standby end circuit breaker; the four-bar connecting rod assembly includes a first driving link, a second driving link, a third driving link and a fourth driving link, and the first driving link and the second driving link are both coaxially arranged on the control The inner side wall of the controller housing is provided with a rotating rod on one side of the long arm of the controller housing, and the rotating points of the first driving link and the second driving link are not at the center point to form a long arm and a short arm; the long arms of the first driving link and the second driving link are both provided with a rotating rod on one side facing away from each other, and the controller housing, the circuit breaker housing of the common end circuit breaker and the circuit breaker housing of the spare end circuit breaker are all provided with a second arc-shaped waist hole in the vertical direction, and the two rotating rods extend into the common end circuit breaker and the spare end circuit breaker respectively through the second arc-shaped waist hole, and the two rotating rods are respectively connected to the controller housing, the circuit breaker housing of the common end circuit breaker and the spare end circuit breaker. The rotating shaft of the common end circuit breaker is connected to the knife switch rotating shaft of the standby end circuit breaker; one end of the short arm of the first drive link is rotatably connected to one end of the third drive link, and the other end of the third drive link is rotatably connected to the bottom of the outer wall of the standby end turntable on the side close to the common end turntable; the long arm of the second drive link is rotatably connected to one end of the fourth drive link, and the other end of the fourth drive link is rotatably connected to the top of the outer wall of the common end turntable on the side close to the standby end turntable; the third drive link and the fourth drive link are both arranged in a Z shape.

[0014] By adopting the above technical solution and setting the mechanical interlocking device, when the circuit breaker at the common end is closed, the knife switch shaft drives the knife switch piece to close into the knife switch seat, and at the same time drives the rotating rod of the first driving link to move downward, thereby driving the first driving link to rotate, forcing the third driving link to operate from the driven operation to drive the standby end turntable to rotate, and then drives the standby end limit rod to press the traction rod of the standby end circuit breaker to the limit, so that the closing component of the standby end circuit breaker cannot be closed; avoid the phenomenon of two circuit breakers being closed at the same time due to misoperation, improve the safety of dual power supply, and effectively improve the efficiency of dual power supply switching and improve the safety of power supply; when the common end power supply fails, the control board detects When the power supply of the common end is cut off and the power is on at the standby end, the common end circuit breaker will be controlled to open. At this time, both the common end circuit breaker and the standby end circuit breaker are in the open state; then the operating mechanism of the standby end circuit breaker is controlled to close the standby end circuit breaker, and the knife switch shaft of the standby end circuit breaker drives the second drive connecting rod to rotate through the rotating rod, and then drives the fourth drive connecting rod to move, so that the common end turntable rotates, and then drives the common end limit rod to press the traction rod of the common end circuit breaker to the limit position, so that the common end circuit breaker cannot be closed, avoiding the phenomenon of two circuit breakers being closed at the same time due to misoperation, improving the safety of dual power supply power use, and effectively improving the efficiency of dual power supply switching and improving the safety of power use.

[0015] Preferably, the common end turntable and the spare end turntable both include a first disk body and a second disk body, the first disk body and the second disk body are rotatably connected to each other, a first clamping block is provided on the first disk body, a second clamping block and a third clamping block are provided on the second disk body, the first clamping block is located between the second clamping block and the third clamping block, a first torsion spring and a second torsion spring are coaxially provided between the first disk body and the second disk body for limiting their mutual rotation, one end of the first torsion spring abuts against the second clamping block, and the other end abuts against the first clamping block; one end of the second torsion spring abuts against the third clamping block, and the other end abuts against the first clamping block.

[0016] By adopting the above technical solution, through the arrangement of the first disk body, the second disk body, the first torsion spring and the second torsion spring, the first torsion spring and the second torsion spring provide buffering and coordination redundancy for the turntable, so that the common end turntable and the spare end turntable can stably drive the common end limit rod and the spare end limit rod to stably limit the traction rod when rotating, reducing the wear on the common end limit rod and the spare end limit rod, and effectively improving the service life of the mechanical interlocking device.

[0017] Preferably, the second disc body is provided with a plurality of buckles along its circumference, the first disc body is provided with a plurality of clamping plates for the buckles to engage along its circumference, and the plurality of clamping plates are provided with notches for the buckles to disengage.

[0018] By adopting the above technical solution, through the arrangement of multiple buckles and multiple clamping plates, the first disk body and the second disk body can be stably buckled together, which effectively improves the structural stability of the common end turntable and the spare end turntable, thereby effectively improving the service life of the mechanical interlocking device.

[0019] Preferably, the operating mechanism includes a bracket, a paddle component rotatably arranged on the bracket, and a driving member; a booster spring is connected to the bottom of the paddle component, and the end of the booster spring away from the paddle assembly is connected to the driving member; one end of the driving member is rotatably connected to the bracket, and the other end is rotatably connected to the knife switch shaft.

[0020] By adopting the above technical solution, through the setting of the assist spring and the paddle component, the driving of the knife switch shaft is facilitated, making the closing process of the closing component more labor-saving and convenient, and effectively improving the power switching efficiency and stability of the automatic transfer switch.

[0021] Preferably, both the common-end circuit breaker and the standby-end circuit breaker are provided with an electric drive assembly for toggling the paddle component, and the electric drive assembly includes a base plate, a support plate, a paddle gear and two drive motors, and the two drive motors are connected to the switch controller; the base plate and the support plate are fixedly connected to the circuit breaker housing, the two drive motors are mounted on the base plate and the output shafts are arranged in the vertical direction, the support plate is arranged above the two drive motors, and the paddle gear is rotatably arranged on the support plate; the output shafts of the two drive motors are connected to the drive gear through the support plate, and the two drive gears are meshed with the paddle gear, and the paddle gear is provided with a paddle clamp for clamping the paddle component at one end away from the two drive gears.

[0022] By adopting the above technical solution and setting up the electric drive component, the controller drives the paddle gear to rotate by controlling the two motors to rotate in the same direction, and the paddle component is toggled by the paddle clip on the paddle gear to complete the closing or opening operation of the closing component, thereby realizing the effect of intelligent and automatic power switching.

[0023] Preferably, both the common-end circuit breaker and the standby-end circuit breaker are provided with monitoring devices for monitoring three-phase voltage and three-phase current, and both monitoring devices are connected to the switch controller.

[0024] By adopting the above technical solution and setting up a monitoring device, it is convenient to monitor the voltage and current data of the power supply in use in real time, and when abnormal data occurs, timely alarm and automatic power switching are carried out to ensure that electrical appliances can operate stably and effectively improve the safety of electricity use.

[0025] Preferably, an external signal interface is provided on the controller circuit board, and the switch controller is communicatively connected to a preset network pan / tilt station via the external signal interface.

[0026] By adopting the above technical solution and setting up the external signal interface, the switch controller can send the collected current and voltage data to the network pan / tilt station for easy viewing by maintenance personnel. At the same time, maintenance personnel can also remotely send instructions to the switch controller to realize remote control and remote parameter modification, thereby effectively improving the convenience and practicality of the intelligent automatic transfer switch.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. Automatic switching between the normal power supply and the backup power supply is achieved through the setting of the switch controller, ensuring the stable operation of electrical appliances and effectively improving the stability of power consumption. Through the setting of the mechanical interlock device, after the normal end circuit breaker or the backup end circuit breaker is closed, the mechanical interlock device locks the other circuit breaker so that it cannot be closed, avoiding the phenomenon of simultaneous closing of two circuit breakers due to misoperation, improving the safety of dual power supply, and effectively improving the efficiency of dual power supply switching and improving power safety.

[0029] 2. Through the setting of the mechanical interlocking device, when the circuit breaker at the common end is closed, the knife switch shaft drives the knife switch piece to close into the knife switch seat, and at the same time drives the rotating rod of the first driving link to move downward, thereby driving the first driving link to rotate, forcing the third driving link to operate from the driven operation to drive the standby end turntable to rotate, and then drives the standby end limit rod to press the traction rod of the standby end circuit breaker to the limit, so that the closing component of the standby end circuit breaker cannot be closed; avoid the phenomenon of two circuit breakers being closed at the same time due to misoperation, improve the safety of dual power supply, and effectively improve the efficiency of dual power supply switching and improve the safety of power use; when the common end power supply fails, the control board detects that the common end When the power is cut off and the standby end receives power, the circuit breaker on the common end will be controlled to open. At this time, both the circuit breaker on the common end and the circuit breaker on the standby end are in the open state. Then, the operating mechanism of the circuit breaker on the standby end is controlled to close the circuit breaker on the standby end. The knife switch shaft of the circuit breaker on the standby end drives the second drive connecting rod to rotate through the rotating rod, and then drives the fourth drive connecting rod to move, so that the common end turntable rotates, and then drives the common end limit rod to press the traction rod of the circuit breaker on the common end to the limit position, so that the circuit breaker on the common end cannot be closed, thereby avoiding the phenomenon of two circuit breakers being closed at the same time due to misoperation, improving the safety of dual power supply, and effectively improving the efficiency of dual power supply switching and improving the safety of power supply.

[0030] 3. Through the arrangement of the first disk body, the second disk body, the first torsion spring and the second torsion spring, the first torsion spring and the second torsion spring provide buffering and coordination redundancy for the turntable, so that the common end turntable and the spare end turntable can stably drive the common end limit rod and the spare end limit rod to stably limit the traction rod when rotating, reducing the wear on the common end limit rod and the spare end limit rod, and effectively improving the service life of the mechanical interlocking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the overall structure of the intelligent automatic transfer switch in the embodiment of the present application;

[0032] Figure 2 This is a schematic diagram of the structure of the switch controller in the embodiment of the present application;

[0033] Figure 3 This is a partial enlarged view of the mechanical interlocking device in the embodiment of the present application;

[0034] Figure 4 is an exploded schematic diagram of a mechanical interlocking device in an embodiment of the present application;

[0035] Figure 5 This is a schematic diagram of the internal structure of the intelligent automatic transfer switch in the embodiment of the present application;

[0036] Figure 6 This is a schematic structural diagram of a closing assembly in an embodiment of the present application;

[0037] Figure 7 This is a schematic diagram of the position structure of the knife switch piece and the knife switch seat, the rotating rod and the knife switch rotating shaft, and the common end limit rod and the traction rod in the embodiment of the present application;

[0038] Figure 8 This is a schematic diagram of the structure of the operating mechanism in the embodiment of the present application;

[0039] Figure 9 It is a structural diagram of the electric drive assembly in an embodiment of the present application.

[0040] Explanation of the reference numerals: 1. Common end circuit breaker; 11. Electric drive assembly; 111. Bottom plate; 112. Support plate; 113. Paddle gear; 114. Drive motor; 115. Paddle clip; 116. Drive gear; 12. Monitoring device; 2. Switch controller; 21. Controller circuit board; 211. Circuit breaker signal interface; 212. External signal interface; 22. Mechanical interlocking device; 23. Controller housing; 231. First arc-shaped waist-shaped hole; 232. Second arc-shaped waist-shaped hole; 24. Common end turntable; 241. Common end limit rod; 25. Spare end turntable; 251. Spare end limit rod; 26. Four-bar linkage assembly; 261. First drive link; 262. Second drive link; 263. Third drive link ;264, fourth drive connecting rod;265, rotating rod;27, first disk;271, first clamping block;272, first torsion spring;273, second torsion spring;274, clamping plate;275, notch;28, second disk;281, second clamping block;282, third clamping block;283, buckle;3, spare end circuit breaker;4, circuit breaker housing;5, three-phase electrical connection terminal;6, three-phase electrical outlet terminal;7, closing assembly;71, knife switch shaft;711, three knife switch blades;712, moving contact piece;72, operating mechanism;721, bracket;722, paddle component;723, driving part;724, assist spring;73, knife switch knife seat;731, static contact piece;732, arc extinguishing component;8, traction rod;9, trip assembly. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-9 The present application is further described in detail. The embodiment of the present application discloses an intelligent automatic transfer switch. Figure 1 and Figure 2, an intelligent automatic transfer switch, comprising a normal-end circuit breaker 1 for connecting to a normal power source, a switch controller 2, and a backup-end circuit breaker 3 for connecting to a backup power source, which are arranged in sequence. The normal-end circuit breaker 1 and the backup-end circuit breaker 3 are both connected to the switch controller 2. The switch controller 2 comprises a controller circuit board 21, a mechanical interlocking device 22 for limiting the simultaneous closing of the normal-end circuit breaker 1 and the backup-end circuit breaker 3, and a controller housing 23 covering the outside of the controller circuit board 21. Two circuit breaker signal interfaces 211 are provided on the controller circuit board 21, and the two circuit breaker signal interfaces 211 are respectively connected to the normal-end circuit breaker 1 and the backup-end circuit breaker 3. The mechanical interlocking device 22 is respectively connected to the normal-end circuit breaker 1 and the backup-end circuit breaker 3. The automatic switching between the normal power source and the backup power source is achieved through the setting of the switch controller 2, ensuring that the electrical appliances can operate stably, thereby effectively improving the stability of power consumption. By setting the mechanical interlocking device 22, after the common-end circuit breaker 1 or the standby-end circuit breaker 3 is closed, the mechanical interlocking device 22 locks the other circuit breaker so that it cannot be closed, thereby avoiding the phenomenon of two circuit breakers being closed at the same time due to misoperation, improving the safety of dual power supply power use, and effectively improving the efficiency of dual power supply switching and improving power safety.

[0042] Reference Figure 3 and Figure 4 The common-end circuit breaker 1 and the standby-end circuit breaker 3 have the same structure. Both the common-end circuit breaker 1 and the standby-end circuit breaker 3 include a circuit breaker housing 4, a three-phase electrical terminal 5, a three-phase electrical outlet terminal 6, a closing assembly 7 for controlling the on / off of the three-phase electrical terminal 5 and the three-phase electrical outlet terminal 6, a traction rod 8, and a tripping assembly 9. The three-phase electrical terminal 5 and the three-phase electrical outlet terminal 6 are both connected to the closing assembly 7, and the closing assembly 7 and the tripping assembly 9 are both connected to the traction rod 8. By setting the closing assembly 7, it is convenient to effectively control the on / off of the circuit breaker. At the same time, by setting the traction rod 8 and the tripping assembly 9, the closing assembly 7 is limited and controlled, so that the closing assembly 7 can be reset in time when an abnormal power consumption condition occurs, thereby avoiding the occurrence of accidental power consumption accidents and achieving the effect of effectively improving the safety of power consumption.

[0043] Reference Figure 3 and Figure 4The closing assembly 7 includes a knife switch shaft 71, an operating mechanism 72 for driving the knife switch shaft 71 to rotate, and three knife switch blade holders 73. Three knife switch blades 711 are arranged in sequence along the length of the knife switch shaft 71. The three knife switch blades 711 are connected to the three-phase power connection terminal 5, and the three knife switch blade holders 73 are connected to the three-phase power outlet terminal 6. The ends of the three knife switch blades 711 are each provided with a moving contact piece 712, and the three knife switch blade holders 73 are each provided with a static contact piece 731. When the three knife switch blades 711 and the knife switch blade holders 73 are closed, the three-phase power connection terminal 5 and the three-phase power outlet terminal 6 are connected. The three knife switch blade holders 73 are each provided with an arc extinguishing component 732. Through the setting of the closing assembly 7, when the circuit breaker needs to be closed to make the three-phase electricity connected, the operating mechanism 72 drives the knife switch shaft 71 to rotate, so that the three knife switch pieces 711 are respectively inserted into the three knife switch knife seats 73, and the moving contact piece 712 on the knife switch piece abuts against the static contact piece 731 on the knife switch knife seat 73, so that the circuit is turned on; in addition, through the setting of the arc extinguishing component 732, the arc caused by poor contact between the moving contact piece 712 and the static contact piece 731 or other unexpected factors can be extinguished and diverted, thereby further effectively improving the safety of electricity use.

[0044] Reference Figure 5 and Figure 6 Operating mechanism 72 includes a bracket 721, a paddle assembly 722 rotatably mounted on bracket 721, and a driver 723. A booster spring 724 is connected to the bottom of paddle assembly 722, and the end of booster spring 724, remote from the paddle assembly, is connected to driver 723. Driver 723 has one end rotatably connected to bracket 721 and the other end rotatably connected to knife switch shaft 71. The arrangement of booster spring 724 and paddle assembly 722 facilitates the driving of knife switch shaft 71, making the closing process of closing assembly 7 more labor-saving and convenient, effectively improving the power switching efficiency and stability of the automatic transfer switch.

[0045] Reference Figure 7The mechanical interlocking device 22 includes a normal-side rotary disk 24, a standby-side rotary disk 25, and a four-bar linkage assembly 26. The normal-side rotary disk 24 and the standby-side rotary disk 25 are coaxially rotatably mounted on the controller housing 23. A normal-side limit rod 241 is provided on the side of the normal-side rotary disk 24 near the normal-side circuit breaker 1 to restrict the normal-side circuit breaker 1 from closing. A standby-side limit rod 251 is provided on the side of the standby-side rotary disk 25 near the standby-side circuit breaker 3 to restrict the standby-side circuit breaker 3 from closing. A first arc-shaped waist-shaped hole 231 is provided in the horizontal direction on the controller housing 23, the circuit breaker housing 4 of the common-end circuit breaker 1, and the circuit breaker housing 4 of the standby-end circuit breaker 3. One end of the common-end limiting rod 241 extends through the first arc-shaped waist-shaped hole 231 into the common-end circuit breaker 1 and is located on one side of the traction rod 8 in the common-end circuit breaker 1. One end of the standby-end limiting rod 251 extends through the first arc-shaped waist-shaped hole 231 into the standby-end circuit breaker 3 and is located on one side of the traction rod 8 in the standby-end circuit breaker 3.

[0046] Reference Figure 7The four-link assembly 26 includes a first drive link 261, a second drive link 262, a third drive link 263 and a fourth drive link 264. The first drive link 261 and the second drive link 262 are both coaxially rotatably arranged on the inner side wall of the controller housing 23, and the rotation points of the first drive link 261 and the second drive link 262 are not at their center points to form a long arm and a short arm. A rotating rod 265 is provided on one end of the long arms of the first drive link 261 and the second drive link 262, facing away from each other. A second arcuate waist-shaped hole 232 is vertically provided on the controller housing 23, the circuit breaker housing 4 of the normal-end circuit breaker 1, and the circuit breaker housing 4 of the standby-end circuit breaker 3. The two rotating rods 265 extend through the second arcuate waist-shaped holes 232 into the normal-end circuit breaker 1 and the standby-end circuit breaker 3, respectively. The two rotating rods 265 are respectively connected to the rotating shaft of the normal-end circuit breaker 1 and the knife switch rotating shaft 71 of the standby-end circuit breaker 3. One end of the short arm of the first drive link 261 is rotatably connected to one end of the third drive link 263, and the other end of the third drive link 263 is rotatably connected to the bottom of the outer wall of the standby-end turntable 25 on the side near the normal-end turntable 24. The long arm of the second drive link 262 is rotatably connected to one end of the fourth drive link 264. The other end of the fourth drive link 264 is rotatably connected to the top of the outer wall of the main end rotary disk 24 near the backup end rotary disk 25. The third drive link 263 and the fourth drive link 264 are both arranged in a Z-shape. Through the configuration of the mechanical interlocking device 22, when the main end circuit breaker 1 is closed, the knife switch shaft 71 drives the knife switch plate to close into the knife switch knife seat 73, and at the same time drives the rotating rod 265 of the first drive link 261 to move downward, thereby driving the first drive link 261 to rotate, forcing the third drive link 263 to operate and drive the backup end rotary disk 25 to rotate. This in turn drives the backup end limit rod 251 to press the draw rod 8 of the backup end circuit breaker 3 to the limit position, preventing the closing assembly 7 of the backup end circuit breaker 3 from closing. This prevents the two circuit breakers from closing simultaneously due to misoperation, improves the safety of dual power supply, and effectively improves the efficiency of dual power supply switching and improves power safety. When the primary power supply fails, the control panel detects that the primary power supply is off while the backup power supply is on, and controls the primary circuit breaker 1 to open. At this time, both the primary circuit breaker 1 and the backup circuit breaker 3 are in the open state. The operating mechanism 72 of the backup circuit breaker 3 is then controlled to close the backup circuit breaker 3. The knife switch shaft 71 of the backup circuit breaker 3 drives the second drive link 262 to rotate via the rotating rod 265, thereby driving the fourth drive link 264 to move, causing the primary turntable 24 to rotate, and then driving the primary limit rod 241 to press the traction rod 8 of the primary circuit breaker 1 to the limit position, making it impossible to close the primary circuit breaker 1. This prevents the two circuit breakers from closing at the same time due to misoperation, thereby improving the safety of dual power supply power consumption and effectively improving the efficiency of dual power supply switching and improving power safety.

[0047] Reference Figure 8 Both the normal-end turntable 24 and the standby-end turntable 25 include a first disk body 27 and a second disk body 28, which are rotatably connected to each other. A first clamping block 271 is provided on the first disk body 27, and a second clamping block 281 and a third clamping block 282 are provided on the second disk body 28. The first clamping block 271 is located between the second clamping block 281 and the third clamping block 282. A first torsion spring 272 and a second torsion spring 273 are coaxially provided between the first disk body 27 and the second disk body 28 to restrict their relative rotation. One end of the first torsion spring 272 abuts the second clamping block 281, and the other end abuts the first clamping block 271. One end of the second torsion spring 273 abuts the third clamping block 282, and the other end abuts the first clamping block 271. Through the arrangement of the first disk body 27, the second disk body 28, the first torsion spring 272 and the second torsion spring 273, the first torsion spring 272 and the second torsion spring 273 provide buffering and coordination redundancy for the turntable, so that the common end turntable 24 and the spare end turntable 25 can stably drive the common end limit rod 241 and the spare end limit rod 251 to stably limit the traction rod 8 when rotating, reducing the wear on the common end limit rod 241 and the spare end limit rod 251, and effectively improving the service life of the mechanical interlocking device 22.

[0048] Reference Figure 8 The second disc 28 is provided with a plurality of latches 283 along its circumference, and the first disc 27 is provided with a plurality of latch plates 274 along its circumference for the latches 283 to engage. Each of the latch plates 274 has a notch 275 for the latches 283 to disengage. The provision of the plurality of latches 283 and the plurality of latch plates 274 facilitates the stable engagement of the first disc 27 and the second disc 28, effectively improving the mechanical stability of the active-end turntable 24 and the standby-end turntable 25, and thereby effectively extending the service life of the mechanical interlocking device 22.

[0049] Reference Figure 9Both the normal-side circuit breaker 1 and the standby-side circuit breaker 3 are equipped with an electric drive assembly 11 for moving the paddle component 722. The electric drive assembly 11 comprises a base plate 111, a support plate 112, a paddle gear 113, and two drive motors 114. Both drive motors 114 are connected to the switch controller 2. The base plate 111 and the support plate 112 are fixedly connected to the circuit breaker housing 4. The two drive motors 114 are mounted on the base plate 111, with their output shafts arranged vertically. The support plate 112 is positioned above the two drive motors 114, and the paddle gear 113 is rotatably mounted on the support plate 112. The output shafts of the two drive motors 114 pass through the support plate 112 and are connected to drive gears 116. Both drive gears 116 mesh with the paddle gear 113. A paddle clamp 115 is provided on the end of the paddle gear 113, away from the two drive gears 116, for clamping the paddle component 722. Through the setting of the electric drive component 11, the controller drives the paddle gear 113 to rotate by controlling the two motors to rotate in the same direction, and the paddle clip 115 on the paddle gear 113 to paddle the paddle component 722 to complete the closing or opening operation of the closing component 7, thereby realizing the effect of intelligent and automatic power switching.

[0050] Reference Figure 4 The circuit breaker 1 at the common end and the circuit breaker 3 at the standby end are both provided with a monitoring device 12 for monitoring the three-phase voltage and three-phase current, and both monitoring devices 12 are connected to the switch controller 2. By setting the monitoring device 12, it is convenient to monitor the voltage and current data of the power supply in use in real time, and when the data is abnormal, timely alarm and automatic power switching are carried out to ensure that the electrical appliances can operate stably and effectively improve the safety of electricity use. An external signal interface 212 is provided on the controller circuit board 21, and the switch controller 2 is connected to the preset network pan-tilt station through the external signal interface 212. By setting the external signal interface 212, it is convenient for the switch controller 2 to send the collected current and voltage data to the network pan-tilt station for maintenance personnel to view. At the same time, the maintenance personnel can also remotely send instructions to the switch controller 2 to realize remote control and remote parameter modification, thereby effectively improving the convenience and practicality of the intelligent automatic transfer switch.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also fall within the scope of protection of the present invention.

Claims

1. An intelligent automatic transfer switch, characterized in that: The invention comprises a normal end circuit breaker (1) for connecting to a normal power source, a standby end circuit breaker (3) for connecting to a standby power source, and a switch controller (2) respectively connected to the normal end circuit breaker (1) and the standby end circuit breaker (3); the switch controller (2) is provided with a mechanical interlocking device (22) respectively connected to the normal end circuit breaker (1) and the standby end circuit breaker (3) and limiting simultaneous closing; the mechanical interlocking device (22) comprises a normal end rotary disk (24), a standby end rotary disk (25), and a connecting rod assembly; The common end turntable (24) and the standby end turntable (25) both comprise a first disk body (27) and a second disk body (28), the first disk body (27) and the second disk body (28) being rotatably connected to each other, a first clamping block (271) being provided on the first disk body (27), a second clamping block (281) and a third clamping block (282) being provided on the second disk body (28), the first clamping block (271) being located between the second clamping block (281) and the third clamping block (282), a first torsion spring (271) being coaxially provided between the first disk body (27) and the second disk body (28) for limiting their mutual rotation 72) and a second torsion spring (273), one end of the first torsion spring (272) abuts against the second clamping block (281), and the other end abuts against the first clamping block (271); one end of the second torsion spring (273) abuts against the third clamping block (282), and the other end abuts against the first clamping block (271); the second disk body (28) is provided with a plurality of buckles (283) along its circumference, and the first disk body (27) is provided with a plurality of clamping plates (274) for clamping the buckles (283) along its circumference, and each of the plurality of clamping plates (274) is provided with a notch (275) for disengaging the buckles (283); The connecting rod assembly is a four-link assembly (26), comprising a first driving connecting rod (261), a second driving connecting rod (262), a third driving connecting rod (263) and a fourth driving connecting rod (264); the first driving connecting rod (261) and the second driving connecting rod (262) are both coaxially rotatably arranged on the inner side wall of the controller housing (23), and the rotation points of the first driving connecting rod (261) and the second driving connecting rod (262) are not at their center points to form a long arm and a short arm; a rotating rod (265) is provided on one side of the long arm of the first driving connecting rod (261) and the second driving connecting rod (262) that is arranged in a reverse direction; the controller housing (23), the circuit breaker housing (4) of the common end circuit breaker (1) and the circuit breaker housing (4) of the standby end circuit breaker (3) are all provided with a second arc-shaped waist-shaped hole (232) in the vertical direction; the two rotating rods (265) The first drive link (261) and the second drive link (262) extend into the common end circuit breaker (1) and the standby end circuit breaker (3) respectively through the second arc-shaped waist hole (232), and the two rotating rods (265) are respectively connected to the rotating shaft of the common end circuit breaker (1) and the knife switch rotating shaft (71) of the standby end circuit breaker (3); one end of the short arm of the first drive link (261) is rotatably connected to one end of the third drive link (263), and the other end of the third drive link (263) is rotatably connected to the bottom of the outer wall of the standby end turntable (25) close to the common end turntable (24); the long arm of the second drive link (262) is rotatably connected to one end of the fourth drive link (264), and the other end of the fourth drive link (264) is rotatably connected to the top of the outer wall of the common end turntable (24) close to the standby end turntable (25); the third drive link (263) and the fourth drive link (264) are both arranged in a Z shape.

2. The intelligent automatic transfer switch according to claim 1, characterized in that: The common-end circuit breaker (1) and the standby-end circuit breaker (3) have the same structure. Both the common-end circuit breaker (1) and the standby-end circuit breaker (3) comprise a circuit breaker housing (4), a three-phase electrical connection terminal (5), a three-phase electrical outlet terminal (6), a closing assembly (7) for controlling the connection and disconnection of the three-phase electrical connection terminal (5) and the three-phase electrical outlet terminal (6), a traction rod (8) and a tripping assembly (9). Both the three-phase electrical connection terminal (5) and the three-phase electrical outlet terminal (6) are connected to the closing assembly (7), and both the closing assembly (7) and the tripping assembly (9) are connected to the traction rod (8).

3. The intelligent automatic transfer switch according to claim 2, characterized in that: The closing assembly (7) comprises a knife switch shaft (71), an operating mechanism (72) for driving the knife switch shaft (71) to rotate, and three knife switch seats (73). Three knife switch pieces (711) are sequentially arranged on the knife switch shaft (71) along its length direction. The three knife switch pieces are connected to the three-phase electrical connection terminal (5), and the three knife switch seats (73) are connected to the three-phase electrical outlet terminal (6). The ends of the three knife switch pieces (711) are all provided with moving contact pieces (712). The three knife switch seats (73) are all provided with static contact pieces (731). When the three knife switch pieces (711) and the knife switch seats (73) are closed, the three-phase electrical connection terminal (5) and the three-phase electrical outlet terminal (6) are connected; and the three knife switch seats (73) are all provided with arc extinguishing components (732).

4. The intelligent automatic transfer switch according to claim 3, characterized in that: The switch controller (2) further comprises: a controller circuit board (21) and a controller housing (23) arranged outside the controller circuit board (21); two circuit breaker signal interfaces (211) are provided on the controller circuit board (21), and the two circuit breaker signal interfaces (211) are respectively connected to the normal end circuit breaker (1) and the standby end circuit breaker (3); the controller housing (23), the circuit breaker housing (4) of the normal end circuit breaker (1) and the circuit breaker housing (4) of the standby end circuit breaker (3) are all provided with a first arc-shaped waist-shaped hole (231) in the horizontal direction, and one end of the normal end limit rod (241) passes through the first arc-shaped waist-shaped hole (231) extends into the common end circuit breaker (1) and is located on one side of the traction rod (8) in the common end circuit breaker (1); one end of the standby end limiting rod (251) passes through the first arc-shaped waist hole (231) and extends into the standby end circuit breaker (3) and is located on one side of the traction rod (8) in the standby end circuit breaker (3); a common end limiting rod (241) for limiting the closing of the common end circuit breaker (1) is provided on one side of the common end rotating disk (24) close to the common end circuit breaker (1); a standby end limiting rod (251) for limiting the closing of the standby end circuit breaker (3) is provided on one side of the standby end rotating disk (25) close to the standby end circuit breaker (3).

5. The intelligent automatic transfer switch according to claim 3, characterized in that: The operating mechanism (72) comprises a bracket (721), a paddle component (722) rotatably arranged on the bracket (721), and a driving member (723); a booster spring (724) is connected to the bottom of the paddle component (722), and one end of the booster spring (724) away from the paddle assembly is connected to the driving member (723); one end of the driving member (723) is rotatably connected to the bracket (721), and the other end is rotatably connected to the knife switch shaft (71).

6. The intelligent automatic transfer switch according to claim 5, characterized in that: The common-end circuit breaker (1) and the standby-end circuit breaker (3) are both provided with an electric drive assembly (11) for toggling a paddle component (722), the electric drive assembly (11) comprising a base plate (111), a support plate (112), a paddle gear (113) and two drive motors (114), both of which are connected to the switch controller (2); the base plate (111) and the support plate (112) are both fixedly connected to the circuit breaker housing (4), and the two drive motors (114) are mounted on the base plate (111). The output shaft is arranged in a vertical direction, the support plate (112) is arranged above the two drive motors (114), and the paddle gear (113) is rotatably arranged on the support plate (112); the output shafts of the two drive motors (114) pass through the support plate (112) and are connected to the drive gear (116), and the two drive gears (116) are meshed with the paddle gear (113), and a paddle clamp (115) for clamping the paddle component (722) is provided at one end of the paddle gear (113) away from the two drive gears (116).

7. The intelligent automatic transfer switch according to claim 1, characterized in that: The common-end circuit breaker (1) and the standby-end circuit breaker (3) are both provided with monitoring devices (12) for monitoring three-phase voltage and three-phase current, and both monitoring devices (12) are connected to the switch controller (2).

8. The intelligent automatic transfer switch according to claim 7, characterized in that: An external signal interface (212) is provided on the controller circuit board (21), and the switch controller (2) is communicatively connected to a preset network pan / tilt station via the external signal interface (212).

Images