Tripping device and circuit breaker

Abstract

The invention relates to the technical field of circuit breakers, in particular to a tripping device and a circuit breaker. The tripping device is arranged in a circuit breaker shell, a static contact, a moving contact, a traction rod and a main shaft are arranged in the circuit breaker shell, and the tripping device is characterized by comprising a tripping assembly, the tripping assembly comprises a driving structure and a tripping piece, and the tripping piece can have a tripping action which abuts against the traction rod and drives the traction rod to move under the action of the driving structure; the reset piece is arranged on one side of the tripping piece, and the reset piece can apply reset driving force to the tripping piece; wherein in the switching-on state, the main shaft provides locking force for keeping the initial position for the reset piece, and in the switching-off state, the main shaft releases the reset piece, so that the reset piece drives the tripping piece to reset. The tripping piece abuts against the traction rod, the traction rod is driven to drive the operation mechanism to move, disconnection of the moving contact and the static contact is achieved, the reset piece can provide reset driving force for the tripping piece in time, and opening operation in a remote non-fault state is achieved.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, specifically to a tripping device and a circuit breaker. Background Technology

[0002] Circuit breakers, as crucial protective electrical devices in power systems, are primarily used to quickly disconnect circuits when faults such as overload, short circuit, and leakage occur, preventing damage to electrical equipment and safety accidents. They are core components ensuring the stable operation of power systems. The tripping device, as the core actuator of the circuit breaker, directly determines the circuit breaker's protection response speed and reliability.

[0003] Traditional tripping devices mainly rely on their built-in electromagnetic trip unit and thermal-magnetic trip unit. These tripping mechanisms are all local, passive response protection, meaning they can only operate when the fault current actually flows through the circuit breaker body and reaches the trigger threshold. The triggering logic strictly depends on the fault current signal of the local circuit, and can only realize automatic tripping or manual tripping in the fault state. When it is necessary to remotely disconnect the power supply of a certain circuit in a non-fault state or under specific conditions, the operator must be physically present to operate the handle. This leads to low operating efficiency, untimely response, and safety risks for personnel to operate in the field in dangerous or inaccessible environments. Summary of the Invention

[0004] In view of this, the present invention provides a tripping device and a circuit breaker to solve the problem that when it is necessary to remotely disconnect the power supply of a circuit under non-fault conditions or under specific conditions, the operator must be physically present to operate the handle.

[0005] In a first aspect, the present invention provides a tripping device disposed within a circuit breaker housing, wherein the circuit breaker housing is provided with a stationary contact, a moving contact, a traction rod, and a main shaft, and the tripping device comprises: The tripping assembly includes a drive structure and a tripping element, wherein the tripping element can perform a tripping action by abutting against the traction rod and driving the traction rod to move under the action of the drive structure; A reset element is disposed on one side of the tripping element, and the reset element can apply a reset driving force to the tripping element; In the closed state, the main shaft provides a locking force to the reset member to maintain its initial position. In the open state, the main shaft releases the reset member, which can drive the tripping member to reset.

[0006] Beneficial effects: The drive structure drives the tripping component to move linearly and abut against the traction rod, which can effectively drive the traction rod and thus drive the operating mechanism to move, thereby disconnecting the moving contact and the stationary contact and completing the tripping operation. After the main shaft locking force disappears, the reset component can provide a reset driving force to the tripping component in a timely manner, ensuring that the tripping component quickly returns to the initial position and is ready for the next operation. This realizes remote tripping operation in non-fault conditions or under specific circumstances, and solves the limitation of traditional tripping devices that must be manually operated on-site.

[0007] In one alternative implementation, a control component is provided for receiving a signal to control the drive structure to move the tripping element. The control component includes a controller and a carrier module, the controller being electrically connected to the carrier module, the carrier module being signal-connected to a host computer, and the controller being electrically connected to the drive structure.

[0008] Beneficial effects: The wireless signal transmission between the host computer and the controller is achieved through a carrier module, avoiding the signal interference problem of traditional wired connection in complex electromagnetic environments. At the same time, the electrical connection between the controller and the drive structure ensures the accurate transmission of motion signals. The drive structure can drive the release mechanism by receiving the motion signals output by the controller. Its rigid connection with the release mechanism ensures the stability of power transmission.

[0009] In one optional embodiment, the drive structure includes a magnetic flux release and a first elastic element. The magnetic flux release includes a release housing, a stationary iron core, and a moving iron core. One end of the moving iron core away from the stationary iron core is connected to the release element. One end of the first elastic element is connected to the release housing, and the other end of the first elastic element is connected to the release element. The first elastic element provides an elastic driving force to the release element to move toward the traction rod.

[0010] Beneficial effects: The coordinated action of the first elastic element and the magnetic flux trip unit enables rapid and reliable operation of the tripping component. Based on electromagnetic principles, the magnetic flux trip unit instantly releases the attraction between the stationary and moving iron cores upon energization, causing the first elastic element to release its elastic force and push the tripping component towards the traction rod, thus achieving the tripping operation. This process does not rely on fault current signals; it can be initiated simply by receiving a tripping command from the host computer, greatly enhancing the response speed. After power is cut off, the stationary iron core re-attracts the moving iron core, preparing for the next tripping operation, achieving cyclical use of the device.

[0011] In one optional embodiment, the release member has a first bend in the horizontal direction at one end facing the traction rod, the first bend abutting against the traction rod, and the other end of the release member has a second bend in the vertical direction, the reset member abutting against the second bend, the first bend and the second bend being perpendicular to each other.

[0012] Beneficial effects: By setting mutually perpendicular first and second bends, the direction of force is clear and stable when the tripping component abuts against the traction rod to drive its movement and when it abuts against the reset component to receive the reset thrust. This ensures the accuracy of the tripping and reset actions. This bending structure design optimizes the mechanical properties of the tripping component while ensuring its functionality, making the stress distribution of the tripping component more reasonable during the stress process, and making it less prone to deformation or damage. This further improves the overall performance and stability of the tripping device.

[0013] In one optional embodiment, the reset member has a first abutting portion and a second abutting portion that abuts against the main shaft. In the open state, the main shaft separates from the second abutting portion to allow the reset member to perform a reset movement. The first abutting portion abuts against the second bending portion to provide a reset driving force for the second bending portion.

[0014] Beneficial effects: By controlling the action of the reset component through the position change of the main shaft, the main shaft locks the reset component when the circuit is closed, ensuring that the tripping component is in a stable state; when the circuit is opened, the main shaft releases the reset component, enabling it to automatically push the tripping component to reset, thus realizing the automation of the tripping and resetting process. This automatic reset mechanism not only improves the convenience of circuit breaker operation and reduces manual intervention, but also greatly enhances the reliability and stability of circuit breaker operation, effectively avoiding various faults and safety hazards that may be caused by the tripping component failing to reset in time.

[0015] In one optional embodiment, the magnetic flux trip unit is used to receive a tripping signal transmitted by the controller, and according to the tripping signal, the attractive force between the moving iron core and the stationary iron core disappears. The first elastic element provides a driving force to the tripping element, causing the first bent portion to abut against the traction rod and drive the traction rod to move. The movement of the traction rod drives the operating mechanism to move. The operating mechanism drives the main shaft to rotate so that the moving contact separates from the stationary contact. When the main shaft rotates, the main shaft separates from the second abutting portion. The reset element performs a reset movement so that the first abutting portion abuts against the second bent portion, providing a reset driving force for the tripping element. The tripping element drives the moving iron core to reset so that the stationary iron core magnetically attracts the moving iron core.

[0016] In one optional embodiment, the reset member is rotatably disposed on one side of the tripping member, and a second elastic member is provided on one side of the reset member. The second elastic member is used to provide an elastic driving force for the reset member to reset the tripping member after the locking force is lost.

[0017] Beneficial effects: Through the ingenious cooperation between the reset component and the second elastic component, the tripping component can be quickly and accurately driven to reset after it has completed tripping, which greatly shortens the reset time and improves the system's working efficiency.

[0018] In one optional embodiment, it further includes: a reset bracket, the reset bracket being fixedly provided with a rotating shaft, the reset member being rotatably connected to the rotating shaft, the second elastic member being a torsion spring, the torsion spring being sleeved on the rotating shaft, one end of the torsion spring being connected to the reset bracket, and the other end of the torsion spring being connected to the reset member.

[0019] Beneficial effects: The reset bracket provides a stable mounting base for the shaft, ensuring that the shaft will not shift or loosen during the stress process, thereby ensuring that the reset component can rotate smoothly around the shaft.

[0020] In one optional embodiment, it further includes: a first micro switch and a second micro switch, the first micro switch and the second micro switch being electrically connected to the control component, the reset member having a third abutment portion, the first micro switch being disposed on the abutment portion's operating path, and the third abutment portion being able to contact the second micro switch and the first abutment portion being able to contact the first micro switch when the reset member performs a reset action.

[0021] Beneficial effects: By setting a first microswitch and a second microswitch, the position status of the tripping and resetting components can be accurately sensed. When the tripping component completes its tripping action and the resetting component performs its resetting action, the corresponding microswitch is triggered, promptly transmitting information that the circuit breaker is in the open state to the controller. The controller then transmits the information to the host computer through the carrier module, realizing real-time monitoring and accurate feedback of the circuit breaker status. This facilitates operators to promptly grasp the working status of the circuit breaker and improves the operational safety and reliability of the entire power system.

[0022] In one optional embodiment, it further includes: a third micro switch, which is electrically connected to the control component and is used to output an alarm signal; A linkage rod is provided, which contacts and engages with the operating mechanism. A third micro switch is located on the movement path of the linkage rod. When the operating mechanism malfunctions, the operating mechanism can drive the linkage rod to contact the third micro switch.

[0023] Beneficial effects: By adding a third microswitch and a linkage rod, a real-time alarm function is achieved when the circuit breaker is in the open state. This allows operators to promptly know the circuit breaker's open status, especially in the event of unexpected opening, enabling rapid response measures and effectively improving system safety and operational efficiency. The connection between the linkage rod and the operating mechanism utilizes the existing moving parts of the operating mechanism, eliminating the need for additional complex transmission mechanisms, thus simplifying the structure and reducing manufacturing costs. Simultaneously, the reliable triggering mechanism of the third microswitch prevents false alarms or missed alarms. Electrically connecting the third microswitch to the control components and transmitting alarm information to the host computer via a carrier module enables remote alarm functionality, further expanding the system's application scope and practicality. In abnormal opening states, the operating mechanism can precisely drive the linkage rod, triggering the third microswitch, ensuring a rapid system response in abnormal opening situations. In normal opening states, the operating mechanism will not drive the linkage rod, avoiding unnecessary alarms and effectively distinguishing between normal and abnormal opening situations. This precise differentiation capability enables operators to more accurately judge the working status of the circuit breaker, avoiding ineffective operations and wasted time due to misjudgment.

[0024] Secondly, the present invention also provides a circuit breaker that includes the tripping device described in any of the above embodiments.

[0025] Beneficial effects: Since circuit breakers include tripping devices and have the same effect as tripping devices, they will not be described in detail here. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the tripping device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the middle cover according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the tripping device in the closed state according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the tripping device in the tripping state according to an embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures: 1. Circuit breaker housing; 101. Base; 102. Middle cover; 103. Top cover; 2. Stationary contact; 3. Moving contact; 4. Traction rod; 5. Main shaft; 6. Tripping assembly; 601. Tripping element; 6011. First bend; 6012. Second bend; 602. Drive structure; 6021. Flux trip unit; 60211. Moving iron core; 6022. First elastic element; 7. Reset element; 701. First abutment; 702. Second abutment; 703. Third abutment; 8. Control assembly; 801. Controller; 802. Carrier module; 9. Second elastic element; 10. Reset bracket; 11. Rotating shaft; 12. First micro switch; 13. Second micro switch; 14. Third micro switch; 15. Linkage rod. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] The following is combined with Figures 1 to 4 The following describes embodiments of the present invention.

[0031] According to an embodiment of the present invention, in one aspect, a tripping device is provided, which is disposed within a circuit breaker housing 1. The circuit breaker housing 1 is provided with a stationary contact 2, a moving contact 3, a traction rod 4, and a main shaft 5. The tripping device includes a tripping assembly 6, a reset component 7, and a control assembly 8.

[0032] Specifically, the tripping assembly 6 includes a drive structure 602 and a tripping element 601. The tripping element 601, under the action of the drive structure 602, can abut against the traction rod 4 and drive the traction rod 4 to move. A reset element 7 is disposed on one side of the tripping element 601, and the reset element 7 can apply a reset driving force to the tripping element 601. Specifically, in the closed state, the main shaft 5 provides a locking force to the reset element 7 to maintain its initial position; in the open state, the main shaft 5 releases the reset element 7, allowing the reset element 7 to drive the tripping element 601 to reset.

[0033] In this embodiment, the tripping member 601 is movably disposed within the circuit breaker housing 1. The drive structure 602 can drive the tripping member 601 to move linearly towards or away from the traction rod 4. The reset member 7 is movably disposed on the side of the tripping member 601 facing the traction rod 4. The tripping member 601 and the reset member 7 are in clearance fit. In the closed state, the main shaft 5 provides a locking force to the reset member 7, keeping the reset member 7 in its original position. When it is necessary to open the circuit through the tripping assembly 6, the drive structure 602 drives the tripping member 601 to move relative to the traction rod 4 and to the traction rod 4. Rod 4 abuts, driving the traction rod 4 to move. The traction rod 4 drives the operating mechanism to move. The operating mechanism is connected to the main shaft 5, and the main shaft 5 is connected to the moving contact 3. When the operating mechanism moves, it drives the main shaft 5 to rotate. The main shaft 5 drives the moving contact 3 to rotate and disconnect it from the stationary contact 2. During the rotation of the main shaft 5, the locking force applied by the main shaft 5 to the reset member 7 gradually disappears. After the locking force disappears, the reset member 7 moves towards the release member 601 under the action of the elastic driving force, abuts against the release member 601, and applies a pushing force to the release member 601, driving the release member 601 to complete the reset. The operating mechanism is a known and publicly disclosed technical means, so it is not described in detail. Advantages: The drive structure drives the tripping component to move linearly and abut against the traction rod, which can effectively drive the traction rod and thus drive the operating mechanism to move, thereby disconnecting the moving contact and the stationary contact and completing the tripping operation. After the main shaft locking force disappears, the reset component can provide a reset driving force to the tripping component in a timely manner, ensuring that the tripping component quickly returns to the initial position and is ready for the next operation. This realizes remote tripping operation in non-fault conditions or under specific circumstances, and solves the limitation of traditional tripping devices that must be manually operated on-site.

[0034] In one embodiment, it further includes: a control component 8, which is used to control the drive structure 602 to move the tripping element 601 upon receiving a signal. The control component 8 includes a controller 801 and a carrier module 802. The controller 801 is electrically connected to the carrier module 802, and the carrier module 802 is signal-connected to a host computer. The controller 801 is electrically connected to the drive structure 602.

[0035] Specifically, the controller 801 is connected to the carrier module 802 via an adapter board, the carrier module 802 is connected to the host computer via a signal, and the controller 801 is connected to the drive structure 602 via a transmission line. The carrier module 802 transmits the tripping signal to the controller 801, and the controller 801 transmits the motion signal to the drive structure 602 via the transmission line. The drive structure 602 then drives the tripping component 601 to move relative to the traction rod 4 and abut against the traction rod 4, thereby driving the traction rod 4 to move.

[0036] Furthermore, the controller 801 can be electrically connected to data acquisition components such as current transformers to obtain circuit status information, thereby controlling the drive structure 602 to drive the trip unit 601 to move. This enables the implementation of one or more of the following functions: electronic instantaneous action characteristics, short-delay action characteristics, delayed overload action characteristics, overvoltage protection function, undervoltage protection function, alarm function, phase loss protection function, communication function testing, and high-temperature protection function. The controller 801 implements the above functions based on the acquired current and voltage signals. The implementation methods of the above functions are existing technologies in this field. Alternatively, external signals can be obtained via a carrier wave to control the trip unit 601 to operate. The carrier wave module 802 is used for remote data signal transmission and reception in the power grid, such as transmitting alarm signals, status signals, or receiving external control signals.

[0037] The signal transmission between the host computer and the controller 801 is realized through the carrier module 802. At the same time, the electrical connection between the controller 801 and the drive structure 602 ensures the accurate transmission of motion signals. The drive structure 602 can drive the tripping component 601 to move by receiving the motion signals output by the controller 801. Its rigid connection with the tripping component 601 ensures the stability of power transmission.

[0038] Furthermore, the circuit breaker housing 1 includes a base 101, a middle cover 102 and an upper cover 103. The middle cover 102 is provided with mounting positions for mounting the controller 801 and the carrier module 802. The middle cover 102 is located between the base 101 and the upper cover 103, and the middle cover 102 is connected to the base 101 and the upper cover 103 respectively.

[0039] Specifically, such as Figure 2 As shown, the middle cover 102 is positioned between the base 101 and the upper cover 103, and is connected to both the base 101 and the upper cover 103. Two mounting positions are provided on the end face of the middle cover 102 facing the upper cover 103, where the controller 801 and the carrier module 802 are respectively installed. The operating mechanism, stationary contact 2, moving contact 3, and main shaft 5 are located within the base 101. The handle connected to the operating mechanism extends from the handle hole on the middle cover 102 for manual operation, enabling the circuit breaker to close and open. By providing dedicated mounting positions on the middle cover 102 to fix the controller 801 and the carrier module 802, the installation stability of these key electronic components is ensured, and daily maintenance and repair are facilitated.

[0040] In one embodiment, the drive structure 602 includes a flux trip unit 6021 and a first elastic element 6022. The flux trip unit 6021 includes a trip unit housing, a stationary iron core, and a moving iron core 60211. One end of the moving iron core 60211 away from the stationary iron core is connected to the trip member 601. One end of the first elastic element 6022 is connected to the trip unit housing, and the other end of the first elastic element 6022 is connected to the trip member 601. The first elastic element 6022 provides the trip member 601 with an elastic driving force to move towards the traction rod 4.

[0041] Specifically, the flux trip unit 6021 includes a trip unit housing (not shown), a stationary iron core (not shown), and a moving iron core 60211. The stationary iron core and the moving iron core 60211 are disposed inside the housing. One end of the moving iron core 60211 passes through the trip unit housing and is disposed outside the trip unit housing and is fixedly connected to the tripping member 601. The tripping member 601 has a sleeve (not shown), and the tripping member 601 is sleeved on the moving iron core 60211 through the sleeve. Preferably, the first elastic member 6022 is a compression spring, and the compression spring is sleeved on the moving iron core 60211 located in the trip unit housing. One end of the spring is connected to the trip unit housing, and the other end is connected to the trip element 601. When the magnetic flux trip unit 6021 is not energized, the stationary iron core magnetically attracts the moving iron core 60211, compressing the spring and placing the trip element 601 in its initial position. When the controller 801 receives the trip signal, it energizes the magnetic flux trip unit 6021, the attraction between the stationary and moving iron cores 60211 disappears, the spring releases its elasticity, and the trip element 601 moves relative to the traction rod 4, causing the moving iron core 60211 to move. The magnetic flux trip unit 6021 is energized momentarily and then de-energized again. After tripping, the trip element 601 is reset under the drive of the reset element 7. After de-energization, the stationary iron core will again generate an attraction force to attract the moving iron core 60211, locking the trip element 601. The stationary iron core is generally a permanent magnet.

[0042] Furthermore, a coil (not shown) is provided on the moving iron core 60211 of the flux trip unit 6021. The coil is connected to a circuit board (not shown). The circuit board includes a power supply circuit for supplying power to the coil of the flux trip unit 6021. The power supply circuit draws power from any phase unit of the circuit breaker or from an external control line to realize remote control of the circuit breaker tripping. When the circuit board receives the action signal of the flux trip unit 6021, the power supply circuit on the circuit board supplies power to the coil of the flux trip unit 6021. After the coil is energized, the moving iron core 60211 and the stationary iron core repel each other at the same pole, and the moving iron core 60211 drives the tripping element 601 to move.

[0043] The coordinated action of the first elastic element 6022 and the magnetic flux trip unit 6021 enables the rapid and reliable operation of the trip unit 601. Based on electromagnetic principles, the magnetic flux trip unit 6021 releases the attraction between the stationary iron core and the moving iron core 60211 the instant power is applied, causing the first elastic element 6022 to release its elastic force and push the trip unit 601 towards the traction rod 4, thus achieving the tripping operation. This process does not rely on fault current signals; it can be initiated simply by receiving a tripping command from the host computer, greatly enhancing the response speed. After power is cut off, the stationary iron core re-attracts the moving iron core 60211, preparing for the next tripping operation, achieving cyclical use of the device.

[0044] In other alternative embodiments, the first elastic element 6022 may be a spring sheet. When the release element 601 is in the initial position, it abuts against the movable end of the spring sheet and compresses the movable end of the spring sheet. After the attraction disappears, the movable end of the spring sheet releases the elastic force to push the release element 601 to move.

[0045] In one embodiment, the release member 601 has a first bent portion 6011 bent in the horizontal direction at one end facing the traction rod 4, the first bent portion 6011 abutting against the traction rod 4, and the other end of the release member 601 has a second bent portion 6012 bent in the vertical direction, the reset member 7 abutting against the second bent portion 6012, and the first bent portion 6011 and the second bent portion 6012 are perpendicular to each other.

[0046] Specifically, such as Figure 1 As shown, the end of the release member 601 facing the traction rod 4 is bent at 90° in the horizontal direction to form a first bent portion 6011, and the other end of the release member 601 is bent at 90° in the vertical direction to form a second bent portion 6012. The first bent portion 6011 and the second bent portion 6012 are perpendicular to each other. A sleeve is provided in the second bent portion 6012. The end face of the second bent portion 6012 facing the traction rod 4 is the contact surface that abuts against the reset member 7. The end face of the first bent portion 6011 that abuts against the traction rod 4 has an arc transition portion (not shown).

[0047] By setting mutually perpendicular first bends 6011 and second bends 6012, the direction of force applied by the tripping component 601 is clear and stable when it abuts against the traction rod 4 to drive the traction rod 4 and when it abuts against the reset component 7 to receive the reset thrust. This ensures the accuracy of the tripping and reset actions. The curved transition section reduces friction and impact when the tripping component 601 abuts against the traction rod 4, extending the service life of the component and improving the reliability of the device. At the same time, this bending structure design optimizes the mechanical properties of the tripping component 601 while ensuring its functionality. This makes the stress distribution of the tripping component 601 more reasonable during the stress process, making it less prone to deformation or damage, further improving the overall performance and stability of the tripping device.

[0048] In one embodiment, the reset member 7 has a first abutting portion 701 and a second abutting portion 702 that abuts against the main shaft 5. In the open state, the main shaft 5 separates from the second abutting portion 702 so that the reset member 7 can perform a reset movement. The first abutting portion 701 abuts against the second bending portion 6012, providing a reset driving force for the second bending portion 6012.

[0049] Specifically, such as Figure 1 As shown, the first abutment 701 is located at the upper end of the reset member 7, and the second abutment 702 is located at the lower end of the reset member 7. When the circuit is closed, the main shaft 5 abuts against the second abutment 702, applying a thrust to the second abutment 702 to lock the reset member 7 in the initial position. When the tripping member 601 completes the tripping, the operating mechanism drives the main shaft 5 to rotate, causing the moving contact 3 to separate from the stationary contact 2. When the main shaft 5 rotates, the thrust applied to the reset member 7 gradually disappears, and the reset member 7 performs a reset movement, causing the first abutment 701 to abut against the second bending part 6012, applying a thrust to the second bending part 6012, and driving the tripping member 601 to reset.

[0050] By controlling the movement of the reset element through changes in the spindle position, the spindle locks the reset element during closing, ensuring the tripping element is in a stable state. During opening, the spindle releases the reset element, allowing it to automatically push the tripping element back to its original position. This automates the tripping and resetting process. This automatic reset mechanism not only improves the ease of circuit breaker operation and reduces manual intervention but also significantly enhances the reliability and stability of the circuit breaker, effectively preventing various faults and safety hazards that may arise from the tripping element failing to reset in a timely manner. Furthermore, this design is simple and compact, occupies little space, and is easy to install and arrange within the circuit breaker housing, reducing manufacturing costs and maintenance difficulty, thus demonstrating high practicality and economy.

[0051] In one embodiment, the flux trip unit 6021 receives the tripping signal transmitted by the controller 801 and, according to the tripping signal, causes the attractive force between the moving iron core 60211 and the stationary iron core to disappear. The first elastic member 6022 provides driving force to the tripping member 601, causing the first bent portion 6011 to abut against the traction rod 4 and drive the traction rod 4 to move. The movement of the traction rod 4 drives the operating mechanism to move. The operating mechanism drives the main shaft 5 to rotate so that the moving contact 3 separates from the stationary contact 2. When the main shaft 5 rotates, the main shaft 5 separates from the second abutting portion 702. The reset member 7 performs a reset movement so that the first abutting portion 701 abuts against the second bent portion 6012, providing a reset driving force for the tripping member 601. The tripping member 601 drives the moving iron core 60211 to reset so that the stationary iron core magnetically attracts the moving iron core 60211.

[0052] In one embodiment, the reset member is rotatably disposed on one side of the tripping member, and a second elastic member is disposed on one side of the reset member. The second elastic member is used to provide an elastic driving force for the reset member to reset the tripping member after the locking force is removed.

[0053] Specifically, such as Figure 1 , Figure 3 and Figure 4 As shown, the reset member 7 is rotatably disposed on the side of the tripping member 601 facing the traction rod 4. The reset member 7 is located below the tripping member 601. In the closed state, the reset member 7 is locked in the initial position and compresses the second elastic member 9. After the tripping member 601 completes tripping, the main shaft 5 rotates, and the thrust applied to the reset member 7 gradually disappears. The second elastic member 9 then releases its elastic force, driving the reset member 7 to rotate and causing the first abutment part 701 to abut against the second bent part 6012. Preferably, the second elastic member 9 is a torsion spring. Through the ingenious cooperation between the reset member 7 and the second elastic member 9, after the tripping member 601 completes tripping, it can be driven to reset quickly and accurately, greatly shortening the reset time and improving the system's working efficiency.

[0054] In other alternative embodiments, the reset member 7 itself is elastic and does not require the elastic force provided by the second elastic member 9. The reset member 7 can be a spring or a sheet. When the circuit is closed, the main shaft 5 applies a thrust to the spring or spring to store energy. When the thrust disappears, the spring or spring releases the elastic force and applies a thrust to the second bending part 6012.

[0055] In one embodiment, it further includes: a reset bracket 10, a rotating shaft 11 fixedly mounted on the reset bracket 10, a reset member 7 rotatably connected to the rotating shaft 11, and a second elastic member 9 being a torsion spring, which is sleeved on the rotating shaft 11, with one end of the torsion spring connected to the reset bracket 10 and the other end of the torsion spring connected to the reset member 7.

[0056] Specifically, such as Figure 1 As shown, the reset bracket 10 has a U-shaped groove, and the two ends of the rotating shaft 11 are fixedly connected to the two side walls of the U-shaped groove. The reset component 7 has a through hole that is rotatably connected to the rotating shaft 11. The reset component 7 is rotatably connected to the rotating shaft 11 through the through hole, and a torsion spring is sleeved on the rotating shaft 11. The reset bracket 10 provides a stable mounting base for the rotating shaft 11, ensuring that the rotating shaft 11 will not shift or loosen during the process of being subjected to force, thereby ensuring that the reset component 7 can rotate smoothly around the rotating shaft 11.

[0057] In one embodiment, the device further includes a first micro switch 12 and a second micro switch 13, which are electrically connected to the control component 8. The reset member 7 has a third abutment portion 703. The first micro switch 12 is disposed on the actuation path of the first abutment portion 701. When the reset member 7 performs a reset action, the third abutment portion 703 can abut against the second micro switch 13, and the first abutment portion 701 can abut against the first micro switch 12.

[0058] Specifically, such as Figure 1 As shown, the first micro switch 12 is disposed on both sides of the travel path of the tripping member 601, and the second micro switch 13 is disposed on the side of the reset member 7 facing the tripping member 601. The second micro switch 13 is located below the first micro switch 12. The side of the reset member 7 facing the second micro switch 13 has a third abutment part 703. The first micro switch 12 and the second micro switch 13 are respectively connected to the controller 801. When the circuit breaker is tripped, the reset member 7 rotates. During the process of the first abutment part 701 applying a pushing force to the tripping member 601 and driving the tripping member 601 to reset, the first abutment part 701 triggers the first micro switch 12. The third abutment part 703 abuts against the second micro switch 13, triggering the second micro switch 13. The first micro switch 12 and the second micro switch 13 transmit information that the circuit breaker is in the tripped state to the controller 801. The controller 801 transmits the collected information to the host computer through the carrier module 802. After the circuit breaker is tripped, the operating mechanism will move the handle to the tripped position. When the operator controls the operating mechanism through the handle to make the moving contact 3 contact the stationary contact 2, the main shaft 5 will rotate and apply a pushing force to the reset member 7 to reset the reset member 7. After the reset member 7 is reset, the first abutment part 701 and the third abutment part 703 will be disconnected from the first micro switch 12 and the second micro switch 13, respectively.

[0059] By setting up a first microswitch 12 and a second microswitch 13, the position status of the tripping element 601 and the reset element 7 can be accurately sensed. When the tripping element 601 completes its tripping action and the reset element 7 performs its reset action, the corresponding microswitch is triggered, promptly transmitting information that the circuit breaker is in the open state to the controller 801. The controller 801 then transmits the information to the host computer via the carrier module 802, realizing real-time monitoring and accurate feedback of the circuit breaker status. This allows operators to promptly grasp the circuit breaker's operating status, improving the operational safety and reliability of the entire power system. Simultaneously, this microswitch setup method has a simple structure, is easy to install, has low cost, and possesses high sensitivity and stability. It can maintain good working performance during long-term use, effectively avoiding various faults and accidents that may be caused by untimely or inaccurate status monitoring, providing strong support for the stable operation of the power system.

[0060] In one embodiment, the system further includes: a third micro switch 14, which is electrically connected to the control component 8 and is used to output an alarm signal; and a linkage rod 15, which engages with the operating mechanism. The third micro switch 14 is positioned along the movement path of the linkage rod 15, and when the operating mechanism malfunctions, the operating mechanism can drive the linkage rod 15 to contact the third micro switch 14.

[0061] Specifically, such as Figure 1 As shown, the linkage rod 15 is in contact with the operating mechanism. When the operating mechanism operates abnormally, the operating mechanism will move the linkage rod 15, causing the linkage rod 15 to come into contact with the third micro switch 14, triggering the third micro switch 14. The third micro switch 14 transmits an alarm message to the controller 801 indicating that the circuit breaker is in an abnormal tripping state. The controller 801 transmits the alarm message to the host computer through the carrier module 802. By adding a third micro switch 14 and a linkage rod 15, a real-time alarm function is realized when the circuit breaker is in the open state. This allows operators to promptly know the open status of the circuit breaker, especially in the event of unexpected openness, enabling them to take rapid countermeasures and effectively improving system safety and operational efficiency. The linkage rod 15 is connected to the operating mechanism. When the linkage rod 15 is displaced by the operating mechanism, it can directly and effectively trigger the third micro switch 14. This not only optimizes space utilization but also improves the response speed and accuracy of the alarm mechanism. At the same time, it utilizes the original moving parts of the operating mechanism without the need for additional complex transmission mechanisms, simplifying the structure and reducing manufacturing costs. The triggering mechanism of the third micro switch 14 is reliable and can accurately output alarm signals, avoiding false alarms or missed alarms. The third micro switch 14 is electrically connected to the control component 8, and the alarm information is transmitted to the host computer through the carrier module 802, realizing remote alarm function and further expanding the application scope and practicality of the system.

[0062] It should be noted that if the operating mechanism malfunctions, the tripping component 601 in this embodiment can be used to trip and open the circuit breaker; if the operating mechanism functions normally, the tripping action is generally completed by manually operating the handle.

[0063] In abnormal tripping conditions, the operating mechanism can precisely drive the linkage rod 15 to move, thereby triggering the third micro switch 14. This ensures that the system can react quickly in the event of abnormal tripping. In normal tripping conditions, the operating mechanism will not drive the linkage rod 15, avoiding unnecessary alarms and effectively distinguishing between normal and abnormal tripping conditions. This precise differentiation capability allows operators to more accurately judge the circuit breaker's operating status, avoiding ineffective operations and wasted time due to misjudgment.

[0064] In abnormal tripping conditions, the operating mechanism can precisely drive the linkage rod to trigger the third micro switch, ensuring a rapid system response in case of abnormal tripping. In normal tripping conditions, the operating mechanism does not drive the linkage rod, avoiding unnecessary alarms and effectively distinguishing between normal and abnormal tripping situations. This precise differentiation capability allows operators to more accurately judge the circuit breaker's operating status, avoiding ineffective operations and wasted time due to misjudgment. Simultaneously, this design fully utilizes the reset component's action path, eliminating the need for large-scale modifications to the circuit breaker's overall structure. While ensuring functionality, it minimizes interference with the existing structure, maintaining the stability and reliability of the circuit breaker structure. It also reduces potential risks and cost increases that could arise from structural adjustments, further enhancing the practicality and economy of the tripping device and the circuit breaker.

[0065] The operation process of the tripping device in this embodiment is as follows: The operator sends a tripping signal to the carrier module 802 through the host computer. The carrier module 802 sends a tripping signal to the controller 801. The controller 801 controls the magnetic flux tripping device 6021 to be energized. The attraction between the stationary iron core and the moving iron core 60211 disappears. The first elastic element 6022 releases its elastic force, driving the tripping element 601 to move relative to the traction rod 4 and abut against the traction rod 4, driving the traction rod 4 to move. The traction rod 4 drives the operating mechanism to move. When the operating mechanism moves, it drives the main shaft 5 to rotate. The main shaft 5 drives the moving contact 3 to rotate and disconnect from the stationary contact 2. During the rotation of the main shaft 5, the thrust applied to the reset element 7 gradually disappears. The second elastic element 9 then releases its elastic force, driving the reset element 7 to rotate and causing the first abutting part 701 to abut against the second bending part 6012. During the process of the second bending part 6012 applying a pushing force to drive the tripping component 601 to reset, the third abutment part 703 disconnects from the second micro switch 13, and the first abutment part 701 triggers the first micro switch 12. The first micro switch 12 transmits information that the circuit breaker is in the open state to the controller 801. The controller 801 transmits the open state information to the host computer through the carrier module 802. After the magnetic flux tripping device 6021 is energized, it will be de-energized again. After the reset, the tripping component 601 will be locked because the stationary iron core will generate an attractive force to attract the moving iron core 60211. After abnormal tripping, the linkage rod 15 abuts against the third micro switch 14, triggering the third micro switch 14. The third micro switch 14 transmits alarm information that the circuit breaker is in the open state to the controller 801. The controller 801 transmits the alarm information to the host computer through the carrier module 802.

[0066] According to an embodiment of the present invention, another aspect provides a circuit breaker including the tripping device in the above embodiment. The circuit breaker can be remotely controlled to trip via the tripping device. When tripping is required under non-fault conditions, manual operation is not required, which improves operational efficiency and avoids the problem of untimely response.

[0067] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A trip unit disposed in a circuit breaker housing (1) provided with a stationary contact (2), a movable contact (3), a drag lever (4) and a main shaft (5), characterized in that, The tripping device includes: The tripping assembly (6) includes a drive structure (602) and a tripping member (601). The tripping member (601) can have a tripping action under the action of the drive structure (602) to abut against the traction rod (4) and drive the traction rod (4) to move. A reset member (7) is disposed on one side of the trip member (601), and the reset member (7) can apply a reset driving force to the trip member (601); In the closed state, the main shaft (5) provides a locking force to the reset member (7) to maintain its initial position. In the open state, the main shaft (5) releases the reset member (7), which can drive the tripping member (601) to reset.

2. The tripping device according to claim 1, characterized in that, Also includes: A control component (8) is used to receive a signal to control the drive structure (602) to move the tripping element (601). The control component (8) includes a controller (801) and a carrier module (802). The controller (801) is electrically connected to the carrier module (802), and the carrier module (802) is signal-connected to a host computer. The controller (801) is electrically connected to the drive structure (602).

3. The tripping device according to claim 1, characterized in that, The drive structure (602) includes a magnetic flux release (6021) and a first elastic element (6022). The magnetic flux release (6021) includes a release housing, a stationary iron core, and a moving iron core (60211). The end of the moving iron core (60211) away from the stationary iron core is connected to the release element (601). One end of the first elastic element (6022) is connected to the release housing, and the other end of the first elastic element (6022) is connected to the release element (601). The first elastic element (6022) provides the release element (601) with an elastic driving force to move toward the traction rod (4).

4. The tripping device according to claim 3, characterized in that, The release member (601) has a first bend (6011) at one end facing the traction rod (4) that bends in the horizontal direction and abuts against the traction rod (4). The other end of the release member (601) has a second bend (6012) that bends in the vertical direction and abuts against the second bend (6012). The first bend (6011) and the second bend (6012) are perpendicular to each other.

5. The tripping device according to claim 4, characterized in that, The reset member (7) has a first abutting part (701) and a second abutting part (702) that abuts against the main shaft (5). In the open state, the main shaft (5) separates from the second abutting part (702) so that the reset member (7) performs a reset movement. The first abutting part (701) abuts against the second bending part (6012) to provide a reset driving force for the second bending part (6012).

6. The tripping device according to claim 5, characterized in that, The magnetic flux trip unit (6021) is used to receive the tripping signal transmitted by the controller (801) and, according to the tripping signal, to eliminate the attraction between the moving iron core (60211) and the stationary iron core. The first elastic element (6022) provides driving force to the tripping element (601), causing the first bent part (6011) to abut against the traction rod (4) and drive the traction rod (4) to move. The movement of the traction rod (4) drives the operating mechanism to move, and the operating mechanism drives the main shaft (5) to rotate. The moving contact (3) is separated from the stationary contact (2). When the main shaft (5) rotates, the main shaft (5) is separated from the second abutment (702). The reset member (7) performs a reset movement so that the first abutment (701) abuts against the second bending part (6012), providing a reset driving force for the tripping member (601). The tripping member (601) drives the moving iron core (60211) to reset so that the stationary iron core magnetically attracts the moving iron core (60211).

7. The tripping device according to any one of claims 1 to 6, characterized in that, The reset member (7) is rotatably disposed on one side of the trip member (601). A second elastic member (9) is provided on one side of the reset member (7). The second elastic member (9) is used to provide an elastic driving force for the reset member (7) to reset the trip member (601) after the locking force is lost.

8. The tripping device according to claim 7, characterized in that, Also includes: The reset bracket (10) is fixedly provided with a rotating shaft (11). The reset component (7) is rotatably connected to the rotating shaft (11). The second elastic component (9) is a torsion spring. The torsion spring is sleeved on the rotating shaft (11). One end of the torsion spring is connected to the reset bracket (10), and the other end of the torsion spring is connected to the reset component (7).

9. The tripping device according to claim 5, characterized in that, Also includes: The first micro switch (12) and the second micro switch (13) are electrically connected to the control component (8). The reset member (7) has a third abutment (703). The first micro switch (12) is disposed on the action path of the first abutment (701). When the reset member (7) performs a reset action, the third abutment (703) can abut against the second micro switch (13), and the first abutment (701) can abut against the first micro switch (12).

10. The tripping device according to claim 1, characterized in that, Also includes: The third micro switch (14) is electrically connected to the control component (8) and is used to output an alarm signal; Linkage rod (15) is in contact with the operating mechanism. The third micro switch (14) is located on the movement path of the linkage rod (15). When the operating mechanism operates abnormally, the operating mechanism can drive the linkage rod (15) to collide with the third micro switch (14).

11. A circuit breaker, characterized in that, It includes the tripping device according to any one of claims 1-10.

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