Emergency safety tripping circuit breaker

Abstract

The invention discloses an emergency safety tripping circuit breaker which comprises a shell, a tripping assembly is fixedly installed in the shell, and the trigger end of the tripping assembly is connected with an electromagnetic tripper and an independent tripping assembly. A control box is fixedly installed on the side wall of the shell. The control box is electrically connected with the electromagnetic release; the independent tripping assembly comprises a pressing block; the pressing block is used for pressing and triggering the tripping assembly; the center of the top end of the pressing block is fixedly connected with the pressing rod; the top end of the pressing rod extends out of the shell and is fixedly connected with the handle; according to the invention, one-key forced power-off can be carried out in a sudden emergency scene by arranging the independent tripping assembly, the response time is fast, the independent tripping assembly is independent from other modules, manual power-off can still be carried out when any module breaks down, and the reliability is greatly improved; each module is compact in structure, does not change the boundary dimension of the circuit breaker, and is suitable for installation of a conventional distribution box.

Description

Technical Field

[0001] This invention relates to the field of leakage current circuit breaker technology, and more specifically to an emergency safety trip circuit breaker. Background Technology

[0002] Residual current circuit breakers (RCCBs) are core safety protection devices in low-voltage power distribution systems. They can automatically cut off power in case of leakage, overload, or short circuit faults and are widely used in various power distribution scenarios such as homes, industrial plants, and office buildings.

[0003] Most existing conventional residual current circuit breakers rely on electrical fault signals to trigger tripping and lack independent emergency mechanical tripping functions; however, they cannot quickly and manually force power off in emergency scenarios such as fires, equipment malfunctions, and personal dangers; some circuit breakers with auxiliary buttons have complex linkages between the buttons and the tripping mechanism, which can easily lead to jamming and reset failures; the emergency tripping is coupled with the residual current protection module and cannot operate independently in case of a fault, resulting in insufficient reliability.

[0004] Therefore, there is an urgent need for a residual current circuit breaker that is simple in structure, reliable in linkage, and has an independent emergency mechanical tripping function. Summary of the Invention

[0005] The purpose of this invention is to provide an emergency safety trip circuit breaker to solve the problems existing in the prior art, and to overcome the defects of existing leakage circuit breakers, such as lack of independent emergency tripping, complex linkage structure, and poor reliability of emergency power outage.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides an emergency safety trip circuit breaker, comprising:

[0007] The housing contains a tripping assembly, the trigger terminals of which are connected to an electromagnetic trip unit and an independent tripping assembly, respectively; a control box is also fixedly installed on the side wall of the housing; the control box is electrically connected to the electromagnetic trip unit.

[0008] The independent tripping assembly includes a pressing block for pressing and triggering the tripping assembly; the top center of the pressing block is fixedly connected to a pressing rod, and a baffle is formed in the middle of the pressing rod; the top of the pressing rod extends out of the housing and is fixedly connected to the handle.

[0009] Preferably, the control box includes a controller, a leakage current detector, and a wireless early warning module;

[0010] The controller is electrically connected to the leakage current detector and the wireless early warning module respectively; the leakage current detector and the wireless early warning module are both electrically connected to the electromagnetic trip unit.

[0011] Preferably, the pressing block is an arc-shaped strip structure, and two through holes are opened on the pressing block at corresponding positions. A horizontally arranged fixing rod is fixedly installed in the through holes. Rotary wheels are rotatably installed at both ends of the fixing rod. The rotating wheels are placed in a sliding groove. The sliding groove is vertically opened on the inner wall of the housing.

[0012] Preferably, a pressure plate is provided on the trigger end of the tripping assembly, and the electromagnetic tripping device is connected to the pressure plate.

[0013] Preferably, a hollow cylinder is formed at the top of the inner cavity of the shell; a through hole is provided at the center of the bottom of the hollow cylinder; the pressing rod passes through the through hole, and the baffle is placed inside the hollow cylinder; a return spring is provided between the baffle and the inner wall of the hollow cylinder.

[0014] Preferably, connecting plates are also fixedly installed on the top and bottom ends of the housing, and the housing is fixedly installed on the wall by bolts to the connecting plates.

[0015] The present invention discloses the following technical effects: This application can force power off with one click in the event of a sudden emergency by setting an independent tripping component, with a response time of <0.1s, and is independent of other modules. If any module fails, it can still be manually powered off, which greatly improves reliability.

[0016] The refined leakage current detection module boasts high accuracy and strong anti-interference capabilities: it reduces false alarms and leakage alarms through multi-level signal processing, and its threshold is adjustable to adapt to different power distribution scenarios. At the same time, it can accurately collect leakage current amplitude, providing a basis for fault diagnosis. Each module has a compact structure, does not change the external dimensions of the circuit breaker, and is compatible with existing distribution boxes. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the housing of the present invention;

[0020] Figure 3 This is a schematic diagram of the pressing block structure of the present invention;

[0021] The components include: 1. Housing; 2. Tripping assembly; 3. Electromagnetic trip unit; 4. Control box; 11. Pressing block; 12. Fixing rod; 13. Rotary wheel; 14. Slide groove; 15. Pressing rod; 16. Baffle; 17. Handle; 18. Hollow cylinder; 19. Return spring; 21. Pressure plate; 41. Leakage detector; 42. Wireless early warning module. Detailed Implementation

[0022] 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, and 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.

[0023] This invention provides an emergency safety trip circuit breaker, comprising:

[0024] The housing 1 has a tripping assembly 2 fixedly installed inside it. The trigger end of the tripping assembly 2 is connected to an electromagnetic tripping device 3 and an independent tripping assembly, respectively. A control box 4 is also fixedly installed on the side wall of the housing 1. The control box 4 is electrically connected to the electromagnetic tripping device 3.

[0025] The independent tripping assembly includes a pressing block 11, which is used to press and trigger the tripping assembly 2; the center of the top of the pressing block 11 is fixedly connected to the pressing rod 15, and a baffle 16 is formed in the middle of the pressing rod 15; the top of the pressing rod 15 extends out of the housing 1 and is fixedly connected to the handle 17.

[0026] Control box 4 includes a controller, a leakage current detector 41, and a wireless early warning module 42;

[0027] The controller is electrically connected to the leakage current detector 41 and the wireless early warning module 42 respectively; both the leakage current detector 41 and the wireless early warning module 42 are electrically connected to the electromagnetic trip unit 3.

[0028] The pressing block 11 has an arc-shaped strip structure. Two through holes are provided on the pressing block 11. A horizontally arranged fixing rod 12 is fixedly installed in the through holes. Rotating wheels 13 are rotatably installed at both ends of the fixing rod 12. The rotating wheels 13 are placed in the sliding groove 14. The sliding groove 14 is vertically opened on the inner wall of the housing 1.

[0029] A pressure plate 21 is provided on the trigger end of the trip assembly 2, and the electromagnetic trip unit 3 is connected to the pressure plate 21.

[0030] A hollow cylinder 18 is formed at the top of the inner cavity of the housing 1; a through hole is provided at the center of the bottom of the hollow cylinder 18; a pressing rod 15 passes through the through hole, and a baffle 16 is placed inside the hollow cylinder 18; a return spring 19 is provided between the baffle 16 and the inner wall of the hollow cylinder 18.

[0031] Connecting plates are also fixedly installed on the top and bottom ends of the housing 1. The housing 1 is fixedly installed on the wall by bolts and connecting plates.

[0032] In one embodiment of the present invention, when an overload occurs in the circuit, the leakage current detector 41 detects the overload in the circuit, interacts with the controller, and then controls the electromagnetic trip unit 3 to complete the tripping of the electromagnetic control tripping assembly 2. When the electromagnetic trip unit 3 fails to work in an external emergency, the controller sends an electrical signal to the wireless early warning module 42 to warn the personnel in the data monitoring room. The staff manually presses the handle 17, which drives the pressing rod 15 to press down. At this time, the pressing block 11 moves vertically downward until it contacts the pressure plate 21, forcibly triggering the tripping assembly 2 to complete the tripping through mechanical transmission. After the tripping assembly 2 completes the tripping, the handle is released, and the return spring 19 returns the handle 17 to its original position under the action of elasticity.

[0033] Furthermore, the sliding wheel 13 maintains the movement trajectory of the pressing rod 15 within the groove 14, and reduces resistance during sliding.

[0034] In one embodiment of the present invention, the leakage current detector 41 is used to monitor the overload in the circuit. It is a high-precision independent detection structure and is electrically connected to the tripping component 2 and the wireless early warning module 42. Its composition includes a zero-sequence current transformer, a signal filtering circuit, a signal amplification circuit, an A / D conversion module, a microcontroller unit (MCU), and a threshold adjustment unit.

[0035] Furthermore, the zero-sequence current transformer is installed at the main circuit input terminal to collect the three-phase current and neutral current of the main circuit, and to detect the vector sum of the currents of each phase in real time. When leakage occurs, the vector sum of the currents is not zero, and an induced voltage signal is generated.

[0036] Furthermore, the signal filtering circuit is connected to the output of the zero-sequence current transformer and adopts an RC low-pass filter structure to filter high-frequency interference and noise signals in the induced voltage signal, ensuring the stability of the detection signal.

[0037] Furthermore, the signal amplification circuit is connected to the output of the signal filtering circuit. It uses an operational amplifier to form a differential amplification structure, which amplifies the filtered weak induced voltage signal to a preset amplitude to meet the needs of subsequent signal processing.

[0038] Furthermore, the A / D conversion module is connected to the output of the signal amplification circuit and is used to convert the amplified analog voltage signal into a digital signal and transmit it to the microcontroller unit (MCU).

[0039] Furthermore, the microcontroller unit (MCU) serves as the core control component of the leakage current detector 41. It receives digital signals transmitted by the A / D conversion module, calculates the current vector sum, compares it with the leakage current threshold preset by the threshold adjustment unit, determines whether a leakage current fault has occurred, and sends control signals to the electromagnetic trip unit and the wireless early warning module.

[0040] Furthermore, the threshold adjustment unit is electrically connected to the microcontroller unit (MCU) and can manually adjust the leakage current threshold (adjustment range is 30mA~500mA) to adapt to the leakage current protection requirements of different power distribution scenarios (such as 30mA in home scenarios and 500mA in industrial scenarios).

[0041] In one embodiment of the present invention, the wireless early warning module 42 includes a signal acquisition unit, a wireless transmission unit, a power supply unit, an early warning triggering unit, and a fault storage unit.

[0042] Signal acquisition unit: Telecommunicationally connected to the MCU of the leakage current detector 41, used to acquire leakage fault signals (including leakage current amplitude), emergency tripping action signals, and normal tripping action signals;

[0043] Wireless transmission unit: Adopts LoRa wireless transmission technology (Bluetooth or NB-IoT optional), with a communication distance of not less than 100 meters (LoRa mode), used to remotely transmit fault signals and action signals to terminal devices (such as mobile APP or operation and maintenance monitoring platform).

[0044] Power supply unit: It adopts dual power supply of lithium battery (rechargeable) + backup power module. The lithium battery capacity is not less than 2000mAh and the standby time is not less than 1 year. The backup power module draws power from the main circuit to ensure that the lithium battery is continuously charged when the main circuit power supply is normal. When the main circuit is de-energized, the lithium battery is powered independently to ensure that the early warning function is not interrupted.

[0045] Early warning triggering unit: connected to the signal acquisition unit and the wireless transmission unit, after receiving the fault signal, it triggers the wireless transmission unit to send early warning information;

[0046] Fault storage unit: Connected to the signal acquisition unit, it is used to store information such as fault type (leakage, emergency trip, normal trip), fault occurrence time, leakage current amplitude, etc. The storage capacity is not less than 100 records, which can be exported through the wireless transmission unit for easy fault tracing and operation and maintenance analysis.

[0047] Furthermore, the electromagnetic trip unit 3 is electrically connected to the MCU of the leakage current detector 41. When the MCU determines that a leakage current fault has occurred and exceeds the preset threshold, it controls the electromagnetic trip unit 3 to act, drives the trip assembly 2, and realizes the disconnection of the main circuit contacts. The conventional trip assembly 2 can also respond to overload and short circuit faults, realizing multiple protections. The operating handle is used to manually control the on and off of the main circuit, and can also realize the reset operation after tripping.

[0048] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0049] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A circuit breaker with emergency safety tripping, characterized in that, include: A housing (1) is provided, and a tripping assembly (2) is fixedly installed inside the housing (1). The trigger end of the tripping assembly (2) is connected to an electromagnetic tripping device (3) and an independent tripping assembly, respectively. A control box (4) is also fixedly installed on the side wall of the housing (1). The control box (4) is electrically connected to the electromagnetic tripping device (3). The independent tripping assembly includes a pressing block (11) for pressing and triggering the tripping assembly (2); the center of the top of the pressing block (11) is fixedly connected to the pressing rod (15), and a baffle (16) is formed in the middle of the pressing rod (15); the top of the pressing rod (15) extends out of the housing (1) and is fixedly connected to the handle (17).

2. The circuit breaker with emergency safety tripping according to claim 1, characterized in that: The control box (4) includes a controller, a leakage current detector (41), and a wireless early warning module (42). The controller is electrically connected to the leakage current detector (41) and the wireless early warning module (42) respectively; the leakage current detector (41) and the wireless early warning module (42) are both electrically connected to the electromagnetic trip unit (3).

3. The circuit breaker with emergency safety tripping according to claim 1, characterized in that: The pressing block (11) is an arc-shaped strip structure. Two through holes are provided on the pressing block (11) at corresponding positions. A horizontally arranged fixing rod (12) is fixedly installed in the through hole. Rotating wheels (13) are rotatably installed at both ends of the fixing rod (12). The rotating wheels (13) are placed in the sliding groove (14). The sliding groove (14) is vertically opened on the inner wall of the housing (1).

4. The circuit breaker with emergency safety tripping according to claim 1, characterized in that: The tripping assembly (2) has a pressure plate (21) on its trigger end, and the electromagnetic tripping device (3) is connected to the pressure plate (21).

5. The circuit breaker with emergency safety tripping according to claim 1, characterized in that: A hollow cylinder (18) is formed at the top of the inner cavity of the housing (1); a through hole is provided at the center of the bottom of the hollow cylinder (18); the pressing rod (15) passes through the through hole, and the baffle (16) is placed inside the hollow cylinder (18); a return spring (19) is provided between the baffle (16) and the inner wall of the hollow cylinder (18).

6. The circuit breaker with emergency safety tripping according to claim 1, characterized in that: The top and bottom ends of the housing (1) are also fixedly installed with connecting pieces, and the housing (1) is fixedly installed on the wall by bolts and connecting pieces.

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