Numerical control circuit breaker and circuit breaking method thereof

Abstract

The invention discloses a numerical control circuit breaker and a circuit breaking method thereof, and relates to the technical field of circuit breakers. Comprising an insulating protective shell, a control arm and a limiting ring are arranged in the insulating protective shell, a first extending abutting block is arranged at one end of the control arm, a clamping block is arranged at the other end of the control arm, a second extending abutting block is fixedly arranged on the outer wall of the first extending abutting block, and a limiting ring is arranged on the limiting ring. And a limiting groove is formed in the outer wall of the limiting ring. Through a linkage structure of a balancing weight and a buffer spring, in a normal power-on state, the gravity of the balancing weight applies stable pressure through the buffer spring, and is matched with clamping and locking of a control arm and a linkage disc, so that rigid connection is formed, vibration and external force interference are effectively resisted, and mistaken opening is prevented; during abnormal power failure, the balancing weight abuts against the extending abutting block to maintain the stability of the movable seat, accidental power failure caused by external collision is avoided, and the structural stability of the circuit breaker under complex working conditions is remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit breakers, in particular to a numerical control circuit breaker and a circuit breaking method thereof. BACKGROUND

[0002] At present, the traditional circuit breaker often has the problem of insufficient mechanical structure stability in the circuit breaking control process. For example, when subjected to vibration or external force interference, mis-tripping or unstable tripping state is prone to occur, which affects the safety and reliability of the circuit system. At the same time, the response speed of the existing circuit breaker breaking execution mechanism needs to be improved. After detecting the overload or short-circuit current signal, it cannot realize fast and accurate breaking operation, which may lead to the expansion of the circuit fault range. In addition, the mechanical locking and unlocking mechanism of the traditional circuit breaker is relatively complex. In the long-term use process, it is easy to malfunction due to mechanical wear and tear, the maintenance cost is high, and there is a lack of effective buffer and stabilizing structure, which is difficult to adapt to complex working environment. SUMMARY

[0003] The purpose of the present application is to provide a numerical control circuit breaker and a circuit breaking method thereof, which solves the technical problems raised in the background art.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a numerical control circuit breaker and a circuit breaking method thereof, comprising an insulation protection shell, the inside of the insulation protection shell is provided with a control arm and a limiting ring, one end of the control arm is provided with a first extension block, the other end of the control arm is provided with an extension sliding plate, the middle part of the control arm is provided with a clamping block, the outer wall of the first extension block is fixedly provided with a second extension block; The outer wall of the limiting ring is provided with a limiting groove, the inner wall of the limiting groove is provided with a plurality of first clamping grooves, the middle part of the outer wall of the top of the limiting ring is provided with a through hole, the outer wall of the top of the limiting ring is fixedly provided with a connecting seat, the outer wall of the connecting seat is provided with a plurality of guide grooves, the connecting seat is divided into a plurality of equal connecting blocks by the plurality of guide grooves, the outer wall of the top of each connecting block is provided with an anti-falling groove, the inner wall of the limiting groove is provided with a linkage disc, the inner wall of the linkage disc is provided with a plurality of protrusions, the outer wall of the linkage disc is fixedly provided with a first extension plate and a second extension plate, the inner wall of the bottom of the insulation protection shell is provided with a placing groove, the inner wall of the placing groove is fixedly provided with a buffer spring, the other end of the buffer spring is fixedly provided with a counterweight.

[0005] Preferably, the inner wall of the bottom of the insulation protection shell is fixedly provided with two fixed seats, the top of each of the two fixed seats is provided with the same limiting plate, the outer wall of the limiting plate is threadedly connected with two limiting bolts, the limiting plate and the two fixed seats are left with a movable groove, and the inner wall of the movable groove is slidably connected with the outer wall of the extension sliding plate.

[0006] Preferably, the outer wall of the insulating protective shell is provided with a control port and a threading port, the inner wall of the insulating protective shell is fixedly provided with a controller, the side of the controller close to the control port is provided with a control switch, the side of the controller away from the control port is provided with an abutting rod, the end of the abutting rod away from the controller is in abutment with the outer wall of the extending slide plate, and the control switch is correspondingly inserted with the control port.

[0007] Preferably, the top of the insulating protective shell is fixedly provided with a top plate, the middle of the top plate is provided with a plate groove, the top of the top plate is fixedly provided with a cover body, the top of the cover body is fixedly provided with an end cover, the outer wall of the end cover is provided with a fixing disc, and the fixing disc is used for bolted mounting and fixing.

[0008] Preferably, the inner part of the limiting ring is movably mounted with a movable seat, a plurality of strip-shaped protrusions are formed in an annular array structure on the outer edge surface of the movable seat, the strip-shaped protrusions correspond to the guide grooves one by one, the strip-shaped protrusions correspond to the anti-dropping grooves one by one, the top of the movable seat is placed with a permanent magnetic slide seat, the permanent magnetic slide seat is arranged in the inner part of the end cover, an installation groove is formed in the inner top end of the permanent magnetic slide seat, a executing rod is threadedly and cooperatively mounted on the top of the movable seat, the executing rod is arranged to be detachably fixed with the permanent magnetic slide seat and has an outer part of one end arranged in the installation groove, and the outer part of one end of the executing rod arranged in the installation groove is sleeved with an electromagnetic coil.

[0009] Preferably, the inner wall of the insulating protective shell is fixedly provided with a fixing column, the outer wall of the first extending abutting block is provided with a positioning hole, the inner wall of the positioning hole is rotatably inserted with the outer wall of the fixing column, the outer wall of the clamping block is clamped with the inner wall of the second clamping groove, and the outer wall of the second extending abutting block is in abutment with the outer wall of the first extending plate.

[0010] Preferably, the inner wall of the insulating protective shell is fixedly provided with a fixing screw, and the fixing screw is arranged with a tension spring between the fixing screw and the pulling groove.

[0011] Preferably, the protrusions correspond to the first clamping grooves one by one, and the linkage disc and the limiting ring are clamped through the protrusions and the first clamping grooves.

[0012] Preferably, the end of the counterweight block away from the buffer spring is in abutment with the outer wall of the first extending abutting block.

[0013] A numerical control circuit breaker and a circuit breaking method thereof: S1: When the electromagnetic coil is energized, a magnetic field is generated and interacts with the permanent magnetic slide block, which drives the execution rod to move upward, lifting the movable seat so that the strip-shaped protrusion of the movable seat slides from the bottom to the top of the guide groove of the limiting ring until it is disengaged from the through hole, thereby releasing the axial constraint on the connecting seat, at this time, the elastic potential energy of the tension spring is released to drive the linkage disc to rotate counterclockwise, and through the clamping of the protrusion and the first clamping groove of the limiting ring, the limiting ring is driven to rotate synchronously, when the limiting ring rotates, the guide groove of the connecting seat rotates, and the strip-shaped protrusion of the movable seat slides into the anti-disengagement groove, so that the movable seat is mechanically locked at the top of the limiting ring, and the first extension plate of the linkage disc abuts against the second extension block of the control arm, thereby driving the control arm to rotate clockwise around the fixed column until the clamping block is embedded in the second clamping groove of the linkage disc to form a rigid connection, and the counterweight applies pressure to the first extension block through the buffer spring to stabilize the position of the control arm and ensure the circuit to be in the on state; S2: When the controller detects an overload or short-circuit current signal, the actuator is triggered to drive the resistance rod to push the extension slide plate to slide in the movable groove, thereby driving the control arm to rotate counterclockwise around the fixed column, and through the lever amplification effect, the clamping block is quickly disengaged from the second clamping groove to release the mechanical connection with the linkage disc, and during the rotation of the control arm, the second extension block abuts against the first extension plate of the linkage disc to force the linkage disc to rotate clockwise and drive the limiting ring to rotate synchronously, at this time, the electromagnetic coil is de-energized, the strip-shaped protrusion of the movable seat rotates with the limiting ring and slides back from the anti-disengagement groove to the guide groove, and finally falls into the through hole to release the mechanical locking and complete the breaking action, and the counterweight compresses the buffer spring when the control arm rotates and continuously abuts against the first extension block to stabilize the position of the movable seat and avoid misoperation caused by external interference; S3: A control port is formed on the outer wall of the insulation protective shell, and the control switch of the controller is located at the control port, so that after the circuit is abnormally tripped, the control switch at the control port can be pressed to manually trip.

[0014] Compared with the related art, the numerical control circuit breaker and the breaking method thereof provided by the application have the following beneficial effects: 1. The numerical control circuit breaker and the breaking method thereof provided by the application, through the linkage structure of the counterweight and the buffer spring, in the normal energized state, the stable pressure of the gravity of the counterweight is applied through the buffer spring, and the clamping and locking of the control arm and the linkage disc are matched to form a rigid connection, which effectively resists vibration and external interference and prevents mis-tripping; when the power is abnormally cut off, the counterweight abuts against the extension block to maintain the stability of the movable seat, thereby avoiding accidental power-off caused by external collision and significantly improving the structural stability of the circuit breaker under complex working conditions.

[0015] 2, The application provides a numerical control circuit breaker and a circuit breaking method thereof, after the controller detects an abnormal current signal, the extension slide plate is pushed by the resistance rod, the lever amplification effect of the control arm is utilized, the clamping block is quickly separated from the linkage disc clamping groove, the circuit breaking operation is realized; the magnetic driving mechanism of the electromagnetic coil and the permanent magnetic slide seat cooperates with the guiding-anti-dropping structure of the limiting ring and the movable seat, the synchronism and accuracy of the tripping action are ensured, the response time from the signal triggering to the completion of the circuit breaking is short, the fault circuit can be timely cut off, and the accident range is reduced.

[0016] 3, The application provides a numerical control circuit breaker and a circuit breaking method thereof, the "sliding-locking" linkage mechanism is formed by the strip-shaped protrusion of the movable seat and the guiding groove and the anti-dropping groove of the limiting ring, mechanical locking is realized through the anti-dropping groove during power-on, the limiting ring is rotated and falls into the through hole to be unlocked during power-off, and the long-term wear problem of the traditional spring structure is avoided; the buffer spring absorbs kinetic energy during the rotation of the control arm, reduces mechanical impact, prolongs the service life of each component, and the convenient operation design of the control port simplifies the reset process after abnormal opening, and reduces the maintenance difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the application; Figure 2 It is a partial structure sectional view of the application; Figure 3 It is a schematic diagram of the structure at the top plate of the application; Figure 4 It is an explosion diagram of part of the structure at the insulating protective shell of the application; Figure 5 It is a schematic diagram of the internal structure at the insulating protective shell of the application; Figure 6 It is a schematic diagram of the structure at the control arm of the application; Figure 7 It is a schematic diagram of the structure at the limiting ring of the application; Figure 8 It is a schematic diagram of the structure at the linkage disc of the application; Figure 9 It is a schematic diagram of the structure at the linkage disc of the application; Figure 4 It is an enlarged view of the structure at A in the application; Figure 10 It is an enlarged view of the structure at B in the application. Figure 5

[0018] ​In the figure: 1, insulating protective shell; 101, top plate; 102, control port; 103, threading port; 104, plate groove; 105, control arm; 106, limiting ring; 107, limiting groove; 108, first clamping groove; 109, through hole; 110, connecting seat; 111, guide groove; 112, anti-dropping groove; 113, linkage disc; 114, protruding block; 115, first extension plate; 116, second clamping groove; 117, second extension plate; 118, pulling groove; 119, tension spring; 120, fixing bolt; 121, first extension block; 122, positioning hole; 123, second extension block; 124, clamping block; 125, extension sliding plate; 126, fixed column; 127, fixed seat; 128, limiting bolt; 129, limiting plate; 130, movable groove; 2, cover body; 3, end cover; 4, fixed disc; 5, permanent magnet sliding seat; 6, electromagnetic coil; 7, execution rod; 8, movable seat; 9, placing groove; 10, buffer spring; 11, counterweight block; 12, controller; 13, resistance rod; 14, control switch. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0020] Embodiment one: Please refer to Figures 1-9 The present application provides a technical solution: a numerical control circuit breaker and a circuit breaking method thereof, comprising an insulating protective shell 1, the inside of the insulating protective shell 1 is provided with a control arm 105 and a limiting ring 106, one end of the control arm 105 is provided with a first extension block 121, the other end of the control arm 105 is provided with an extension sliding plate 125, the middle part of the control arm 105 is provided with a clamping block 124, and the outer wall of the first extension block 121 is fixedly provided with a second extension block 123. The outer wall of the limiting ring 106 is provided with a limiting groove 107, the inner wall of the limiting groove 107 is provided with a plurality of first clamping grooves 108, the top outer wall of the limiting ring 106 is provided with a through hole 109 in the middle, the top outer wall of the limiting ring 106 is fixedly provided with a connecting seat 110, the outer wall of the connecting seat 110 is provided with a plurality of guide grooves 111, the plurality of guide grooves 111 divide the connecting seat 110 into a plurality of equal connecting blocks, the top outer wall of each connecting block is provided with an anti-falling groove 112, the inner wall of the limiting groove 107 is provided with a linkage disc 113, the inner wall of the linkage disc 113 is provided with a plurality of protruding blocks 114, the outer wall of the linkage disc 113 is fixedly provided with a first extension plate 115 and a second extension plate 117, the inner wall of the insulating protective shell 1 is provided with a placing groove 9 at the bottom, the inner wall of the placing groove 9 is fixedly provided with a buffer spring 10, the other end of the buffer spring 10 is fixedly provided with a counterweight 11, the top of the insulating protective shell 1 is fixedly provided with a top plate 101, the middle of the top plate 101 is provided with a plate groove 104, the top of the top plate 101 is fixedly provided with a cover body 2, the top of the cover body 2 is fixedly provided with an end cover 3, the outer wall of the end cover 3 is provided with a fixed disc 4, the fixed disc 4 is used for bolted installation and fixation, the inside of the limiting ring 106 is movably installed with a movable seat 8, a plurality of strip-shaped protrusions are formed in an annular array structure on the outer edge surface of the movable seat 8, the strip-shaped protrusions correspond one by one to the guide grooves 111, the strip-shaped protrusions correspond one by one to the anti-falling grooves 112, the top of the movable seat 8 is placed with a permanent magnetic sliding seat 5, the permanent magnetic sliding seat 5 is arranged inside the end cover 3, an installation groove is formed in the top end inside of the permanent magnetic sliding seat 5, a executing rod 7 is threadedly and cooperatively installed on the top of the movable seat 8, the executing rod 7 is arranged to pass out of the installation groove and is detachably fixed with the permanent magnetic sliding seat 5, and the end of the executing rod 7 located inside the installation groove is externally sleeved with an electromagnetic coil 6, the inner wall of the insulating protective shell 1 is fixedly provided with a fixed column 126 at the bottom, the outer wall of the first extension block 121 is provided with a positioning hole 122, the inner wall of the positioning hole 122 is rotatably inserted with the outer wall of the fixed column 126, the outer wall of the clamping block 124 is clamped with the inner wall of the second clamping groove 116, the outer wall of the second extension block 123 is abutted with the outer wall of the first extension plate 115, the inner wall of the insulating protective shell 1 is fixedly provided with a fixed screw 120, the fixed screw 120 is provided with a tension spring 119 between the fixed screw 120 and the tension groove 118, the protruding blocks 114 correspond one by one to the first clamping grooves 108, the linkage disc 113 is clamped with the limiting ring 106 through the protruding blocks 114 and the first clamping grooves 108, and the end of the counterweight 11 away from the buffer spring 10 is abutted with the outer wall of the first extension block 121.

[0021] The inner wall of the insulating protective shell 1 is fixedly provided with two fixed seats 127, the top of each of the two fixed seats 127 is provided with a same limiting plate 129, the outer wall of the limiting plate 129 is threadedly connected with two limiting bolts 128, the limiting plate 129 and the two fixed seats 127 are provided with an active groove 130, the inner wall of the active groove 130 is slidably connected with the outer wall of the extension sliding plate 125, the outer wall of the insulating protective shell 1 is provided with a control port 102 and a threading port 103, the inner wall of the insulating protective shell 1 is fixedly provided with a controller 12, the side, close to the control port 102, of the controller 12 is provided with a control switch 14, the side, away from the control port 102, of the controller 12 is provided with an abutting rod 13, the end, away from the controller 12, of the abutting rod 13 is abutted with the outer wall of the extension sliding plate 125, and the control switch 14 is correspondingly connected with the control port 102.

[0022] A numerical control circuit breaker and a circuit breaking method thereof S1: when the electromagnetic coil 6 is powered, a magnetic field is generated to interact with the permanent magnetic slide 5, the permanent magnetic slide 5 drives the execution rod 7 to move upward, the movable seat 8 is lifted to make the strip-shaped protrusion slide from the bottom to the top of the guide groove 111 of the limiting ring 106 until it is separated from the through hole 109, the axial constraint on the connecting seat 110 is released, at this time, the tension spring 119 releases the elastic potential energy to drive the linkage disc 113 to rotate counterclockwise, the linkage disc 113 is connected with the first clamping groove 108 of the limiting ring 106 through the protruding block 114, the limiting ring 106 is driven to rotate synchronously, when the limiting ring 106 rotates, the guide groove 111 of the connecting seat 110 rotates, the strip-shaped protrusion of the movable seat 8 slides into the anti-dropping groove 112, so that the movable seat 8 is mechanically locked at the top of the limiting ring 106, the first extension plate 115 of the linkage disc 113 abuts against the second extension abutting block 123 of the control arm 105, the control arm 105 is pushed to rotate clockwise around the fixed column 126 until the clamping block 124 is embedded into the second clamping groove 116 of the linkage disc 113 to form a rigid connection, the counterweight 11 applies pressure to the first extension abutting block 121 through the buffer spring 10 to stabilize the position of the control arm 105 and ensure the circuit to be connected; S2: When the controller 12 detects an overload or short-circuit current signal, the actuator drive is triggered to push the extension slide 125 to slide in the active slot 130, driving the control arm 105 to rotate counterclockwise around the fixed column 126. The control arm 105, through the lever amplification effect, causes the clamping block 124 to quickly disengage from the second clamping slot 116, releasing the mechanical connection with the linkage disc 113. During the rotation of the control arm 105, the second extension block 123 contacts the first extension plate 115 of the linkage disc 113, forcing the linkage disc 113 to rotate clockwise and synchronously rotating the limit ring 106. At this time, the electromagnetic coil 6 is de-energized, the strip-shaped protrusion of the movable seat 8 rotates with the limit ring 106, slides back from the anti-dropping slot 112 to the guide slot 111, and finally falls into the through hole 109, releasing the mechanical locking and completing the breaking action. The counterweight 11 compresses the buffer spring 10 when the control arm 105 rotates, and continuously contacts the first extension block 121, stabilizing the position of the movable seat 8 and avoiding external interference causing misoperation. S3: By opening a control port 102 on the outer wall of the insulation protective shell 1, the control switch 14 of the controller 12 is located at the control port 102. After the circuit is abnormally tripped, the control switch 14 can be pressed at the control port 102 to manually trip.

[0023] In this embodiment, When the power is on: When the electromagnetic coil 6 is powered, a magnetic field is generated and interacts with the permanent magnet slide 5, which drives the execution rod 7 to move upwards, thereby lifting the movable seat 8. The strip-shaped protrusion of the movable seat 8 slides from the bottom to the top of the guide groove 111, until it is inside the through hole 109 of the limiting ring 106, releasing the axial constraint on the connecting seat 110. After the movable seat 8 is disengaged from the through hole 109, it is no longer clamped to the connecting seat 110 by the strip-shaped protrusion. One end of the tension spring 119 is connected to the fixed bolt 120, and the other end is embedded in the pull groove 118 of the linkage disc 113. The elastic potential energy of the tension spring 119 is released, driving the linkage disc 113 to rotate counterclockwise. The linkage disc 113 is connected to the first clamping groove 108 of the limiting ring 106 through the protrusion 114, driving the limiting ring 106 to rotate synchronously. When the limiting ring 106 rotates, the guide groove 111 of the connecting seat 110 rotates with it. The strip-shaped protrusion of the movable seat 8 slides into the anti-disengagement groove 112 from the end of the guide groove 111. After the strip-shaped protrusion enters, the movable seat 8 is limited to the top of the limiting ring 106 and cannot fall axially, ensuring mechanical locking in the tripped state. When the linkage disc 113 rotates, the arc surface of the first extension plate 115 gradually approaches the second extension block 123 of the control arm 105. The purpose of the arc surface design is to convert the circular motion into a radial thrust on 123 through the accumulation of rotation angle, avoiding rigid impact. When the arc surface of the first extension plate 115 touches the second extension block 123, the thrust forces the control arm 105 to rotate clockwise around the fixed column 126. The clamping block 124 in the middle of the control arm 105 moves from the outside of the linkage disc 113 to the second clamping groove 116 along the rotation trajectory. The inner wall of the second clamping groove 116 is chamfered to facilitate the sliding of the clamping block 124. When the clamping block 124 is completely embedded in the second clamping groove 116, the rotation of the limiting ring 106 is mechanically locked. At this time, the linkage disc 113, the limiting ring 106, and the control arm 105 form a rigid connection. After the control arm 105 is rotated in place, the arc surface of the first extension block 121 contacts the top of the counterweight 11. The gravity of the counterweight 11 exerts downward pressure through the buffer spring 10, further stabilizing the position of the control arm 105 and preventing it from rebounding due to external forces. After the clamping is completed, the position of the control arm 105 is fixed, ensuring that the circuit is in a connected state and avoiding mis-tripping due to factors such as vibration; In the case of current abnormality: The control port 102 is arranged on the outer wall of the insulation protective shell 1, and the control switch 14 of the controller 12 is located at the control port 102. When the circuit is abnormal, the control switch 14 can be pressed at the control port 102 to manually trip, and the driving abutment rod 13 is driven to move towards the extension sliding plate 125. The extension sliding plate 125 is located in the movable slot 130 formed by the two fixed seats 127 and the limiting plate 129. The movable slot 130 limits the radial displacement of the extension sliding plate 125 and only allows the extension sliding plate 125 to slide in the axial direction of the control arm 105. The pushing force of the abutment rod 13 forces the extension sliding plate 125 to slide in the movable slot 130, thereby driving the control arm 105 to rotate as a whole around the fixed column 126. The control arm 105 forms a lever structure with the fixed column 126 as a fulcrum. A small sliding displacement of the extension sliding plate 125 can be amplified by the lever, so that the clamping block 124 generates a larger tangential displacement and quickly separates from the second clamping groove 116 of the linkage disc 113. When the control arm 105 rotates, the clamping block 124 slides along the inclined surface of the inner wall of the second clamping groove 116 until it completely separates from the second clamping groove 116 and releases the mechanical connection with the linkage disc 113. When the control arm 105 rotates, the first extension abutment block 121 moves downward together with the control arm 105 and presses the arc surface at the top of the counterweight block 11. During the rotation of the control arm 105, the second extension abutment block 123 gradually approaches the first extension plate 115 of the linkage disc 113. The end surface of the first extension plate 115 is designed as an arc surface. When the second extension abutment block 123 abuts against the first extension plate 115, the rotational kinetic energy of the control arm 105 is transmitted to the first extension plate 115 through the second extension abutment block 123, thereby forcing the linkage disc 113 to rotate clockwise. The linkage disc 113 is clamped with the first clamping groove 108 of the limiting ring 106 through the protrusion 114, so that the rotation of the linkage disc 113 drives the limiting ring 106 to rotate synchronously. Since the current is in an abnormal state, the electromagnetic coil 6 is de-energized. With the rotation of the limiting ring 106, the strip-shaped protrusion of the movable seat 8 slides from the top to the bottom of the guide groove 111 until it completely falls into the through hole 109. At the same time, with the rotation of the limiting ring 106, the second extension plate 117 is in a compressed state with respect to the tension spring 119. When the control arm 105 rotates, the first extension abutment block 121 moves downward together with the control arm 105 and presses the arc surface at the top of the counterweight block 11. The counterweight block 11 is connected with the buffer spring 10 below and compresses the buffer spring 10 after being pressed. When the movable seat 8 falls into the through hole 109, the counterweight block 11 always abuts against the arc surface of the first extension abutment block 121, thereby ensuring the stability of the movable seat 8. At the same time, the acting force of the counterweight block 11 is greater than the acting force of the abutment rod 13, thereby effectively avoiding the phenomenon that the circuit breaker is de-energized under the condition that the circuit breaker is subjected to external impact or interference.

Claims

1. A numerically controlled circuit breaker comprising an insulating protective casing (1), characterized in that: The inside of the insulation protective shell (1) is provided with a control arm (105) and a limiting ring (106), one end of the control arm (105) is provided with a first extension stop block (121), the other end of the control arm (105) is provided with an extension sliding plate (125), the middle part of the control arm (105) is provided with a clamping block (124), and the outer wall of the first extension stop block (121) is fixedly provided with a second extension stop block (123); The outer wall of the limiting ring (106) is provided with a limiting groove (107), the inner wall of the limiting groove (107) is provided with a plurality of first clamping grooves (108), the middle part of the top outer wall of the limiting ring (106) is provided with a through hole (109), the top outer wall of the limiting ring (106) is fixedly provided with a connecting seat (110), the outer wall of the connecting seat (110) is provided with a plurality of guide grooves (111), the connecting seat (110) is divided into a plurality of equal connecting blocks by the plurality of guide grooves (111), the top outer wall of each connecting block is provided with an anti-dropping groove (112), the inner wall of the limiting groove (107) is provided with a linkage disc (113), the inner wall of the linkage disc (113) is provided with a plurality of protrusions (114), the outer wall of the linkage disc (113) is fixedly provided with a first extension plate (115) and a second extension plate (117), the inner wall of the insulation protective shell (1) is provided with a placing groove (9), the inner wall of the placing groove (9) is fixedly provided with a buffer spring (10), and the other end of the buffer spring (10) is fixedly provided with a counterweight block (11).

2. A numerically controlled circuit breaker according to claim 1, wherein: The inner wall of the insulation protective shell (1) is fixedly provided with two fixed seats (127), the top of each of the two fixed seats (127) is provided with the same limiting plate (129), the outer wall of the limiting plate (129) is threadedly connected with two limiting bolts (128), and the limiting plate (129) and the two fixed seats (127) are provided with a movable groove (130) therebetween.

3. A numerically controlled circuit breaker according to claim 1, wherein: The outer wall of the insulation protective shell (1) is provided with a control port (102) and a threading port (103), the inner wall of the insulation protective shell (1) is fixedly provided with a controller (12), one side of the controller (12) close to the control port (102) is provided with a control switch (14), the other side of the controller (12) away from the control port (102) is provided with a stop rod (13), one end of the stop rod (13) away from the controller (12) is in abutment with the outer wall of the extension sliding plate (125), and the control switch (14) is correspondingly connected with the control port (102).

4. A numerical control circuit breaker according to claim 1, wherein: The top of the insulation protective shell (1) is fixedly provided with a top plate (101), the middle part of the top plate (101) is provided with a plate groove (104), the top of the top plate (101) is fixedly provided with a cover body (2), the top of the cover body (2) is fixedly provided with an end cover (3), the outer wall of the end cover (3) is provided with a fixed disc (4), and the fixed disc (4) is used for bolted mounting and fixing.

5. A numerically controlled circuit breaker according to claim 1, wherein: The inner movable mounting of the limiting ring (106) is movably mounted with a movable seat (8), a plurality of strip-shaped protrusions are formed in annular array configuration on the outer edge surface of the movable seat (8), the strip-shaped protrusions correspond to the guide grooves (111) one by one, the strip-shaped protrusions correspond to the anti-dropping grooves (112) one by one, a permanent magnetic sliding seat (5) is placed on the top of the movable seat (8), the permanent magnetic sliding seat (5) is arranged inside the end cover (3), an installation groove is formed in the top end inside of the permanent magnetic sliding seat (5), an actuating rod (7) is threadedly and cooperatively mounted on the top of the movable seat (8), the actuating rod (7) is penetrated out of the installation groove and is detachably fixed with the permanent magnetic sliding seat (5), and the outer end of the one end of the actuating rod (7) located in the installation groove is sleeved with an electromagnetic coil (6).

6. A numerically controlled circuit breaker according to claim 1, wherein: The inner wall of the insulating protective shell (1) is fixedly provided with a fixed column (126), the outer wall of the first extension block (121) is provided with a positioning hole (122), the inner wall of the positioning hole (122) is rotationally inserted with the outer wall of the fixed column (126), the outer wall of the clamping block (124) is clamped with the inner wall of the second clamping groove (116), and the outer wall of the second extension block (123) is abutted with the outer wall of the first extension plate (115).

7. A numerically controlled circuit breaker according to claim 1, wherein: The inner wall of the insulating protective shell (1) is fixedly provided with a fixed bolt (120), and the fixed bolt (120) is provided with a tension spring (119) between the tension groove (118).

8. A numerical control circuit breaker according to claim 1, wherein: The protrusions (114) correspond to the first clamping grooves (108) one by one, and the linkage disc (113) is clamped with the limiting ring (106) through the protrusions (114) and the first clamping grooves (108).

9. A numerically controlled circuit breaker according to claim 2, wherein: The end, away from the buffer spring (10), of the counterweight block (11) is abutted with the outer wall of the first extension block (121).

10. A numerical control circuit breaker and a circuit breaking method thereof according to claims 1-9, characterized in that: S1: When the electromagnetic coil (6) is energized, a magnetic field is generated and interacts with the permanent magnet slide (5), the permanent magnet slide (5) drives the execution rod (7) to move upwards, pulls the movable seat (8) to make the strip-shaped protrusion slide from the bottom to the top of the guide groove (111) of the limiting ring (106), until it is separated from the through hole (109), releasing the axial constraint on the connecting seat (110), at this time, the tension spring (119) releases the elastic potential energy, drives the linkage disc (113) to rotate counterclockwise, through the block (114) and the first clamping groove (108) of the limiting ring (106), drives the limiting ring (106) to rotate synchronously, when the limiting ring (106) rotates, the guide groove (111) of the connecting seat (110) rotates, the strip-shaped protrusion of the movable seat (8) slides into the anti-dropping groove (112), so that the movable seat (8) is mechanically locked at the top of the limiting ring (106), the first extension plate (115) of the linkage disc (113) is in contact with the second extension block (123) of the control arm (105), and the control arm (105) is pushed to rotate clockwise around the fixed column (126), until the clamping block (124) is embedded in the second clamping groove (116) of the linkage disc (113), forming a rigid connection, the counterweight block (11) applies pressure to the first extension block (121) through the buffer spring (10), stabilizing the position of the control arm (105), ensuring the circuit is connected; S2: When the controller (12) detects an overload or short-circuit current signal, the actuator drives the resistance rod (13) to push the extension slide plate (125) to slide in the movable groove (130), driving the control arm (105) to rotate counterclockwise around the fixed column (126), the control arm (105) makes the clamping block (124) quickly disengage from the second clamping groove (116) through the lever amplification effect, releasing the mechanical connection with the linkage disc (113), during the rotation of the control arm (105), the second extension block (123) of the control arm (105) is in contact with the first extension plate (115) of the linkage disc (113), forcing the linkage disc (113) to rotate clockwise and driving the limiting ring (106) to rotate synchronously, at this time, the electromagnetic coil (6) is de-energized, the strip-shaped protrusion of the movable seat (8) rotates with the limiting ring (106) and slides back from the anti-dropping groove (112) to the guide groove (111), and finally falls into the through hole (109), releasing the mechanical locking, completing the breaking action, the counterweight block (11) compresses the buffer spring (10) when the control arm (105) rotates, and continuously contacts the first extension block (121), stabilizing the position of the movable seat (8), avoiding misoperation caused by external interference; S3: By opening a control port (102) on the outer wall of the insulating protective shell (1), the control switch (14) of the controller (12) is located at the control port (102), after the circuit is abnormally tripped, the control switch 14 at the control port (102) can be pressed to manually trip.

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