Modular intelligent miniature circuit breaker

Abstract

The utility model discloses a modularized intelligent miniature circuit breaker, and belongs to the technical field of switching devices. Comprising a miniature circuit breaker body, a measurement and control module and an electric operation module. The measurement and control module is installed on the wiring side of the miniature circuit breaker body. The electric operation module is installed on the side face of the miniature circuit breaker. The measurement and control module is used for sending an instruction for controlling the miniature circuit breaker body to the electric operation module; the electric operation module is used for sending a self state signal and a miniature circuit breaker body state signal to the measurement and control module and operating the miniature circuit breaker body; and data transmission is carried out between the measurement and control module and the electric operation module through optical signals. The miniature circuit breaker has the advantages that the module can be directly added on the original miniature circuit breaker body, the replacement time can be saved, and the replacement cost is reduced; the size is small; and the anti-interference capability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of switch electrical appliances, and particularly relates to a modular intelligent miniature circuit breaker. Background Art

[0002] As my country's power supply network gradually becomes intelligent, State Grid Corporation of China is also placing increasing demands on its power supply equipment. Intelligent miniature circuit breakers, which integrate power measurement, electric closing and opening, multi-function protection, and communication functions on top of conventional miniature circuit breakers, represent an upgrade to the intelligent miniature circuit breaker.

[0003] Smart miniature circuit breakers are primarily integrated. The measuring components of these circuit breakers are integrated into the cavity of the miniature circuit breaker, converting current and voltage solely into electrical signals that can be sampled by the control component. These components must be electrically connected to the control component, making it impossible to decouple the measuring, control, and miniature circuit breakers. In intelligent retrofit applications, integrated smart miniature circuit breakers present the following challenges when replacing existing miniature circuit breakers entirely: high component replacement costs and the time-consuming need to reinstall wiring within the existing distribution box. This makes intelligent retrofits less cost-effective and hinders widespread adoption.

[0004] In view of the above-mentioned existing technologies, it is necessary to improve the structure of the existing intelligent miniature circuit breaker. To this end, the applicant has made a useful design. The technical solution to be introduced below was produced in this context. Utility Model Content

[0005] The purpose of the utility model is to provide a modular intelligent miniature circuit breaker, which can be directly installed on the original miniature circuit breaker body, with high cost performance, small size and strong anti-interference ability.

[0006] The objective of the present utility model is achieved by providing a modular intelligent miniature circuit breaker, comprising a miniature circuit breaker body, a measurement and control module, and an electric operation module; the measurement and control module is mounted on the connection side of the miniature circuit breaker body, and the electric operation module is mounted on the side of the miniature circuit breaker body; the measurement and control module is used to send instructions for controlling the miniature circuit breaker body to the electric operation module; the electric operation module is used to send its own status signal and the miniature circuit breaker body status signal to the measurement and control module, and to operate the miniature circuit breaker body; data is transmitted between the measurement and control module and the electric operation module via optical signals.

[0007] In a specific embodiment of the present invention, the measurement and control module includes a housing and a first circuit board installed in the housing. The housing includes an upper cover and a base. The upper cover, the first circuit board and the base are all provided with wire holes for the main circuit wires to pass through and then be connected to the wiring holes of the miniature circuit breaker body.

[0008] In another specific embodiment of the present invention, the first circuit board is provided with a first control unit, a current sampling unit, a voltage sampling unit, a first optical signal transmitting unit, a first optical signal receiving unit, a wireless communication unit, and a first power supply unit. The first control unit is electrically connected to the current sampling unit, the voltage sampling unit, the first optical signal transmitting unit, and the first optical signal receiving unit, respectively. The current sampling unit is configured to sample current flowing through the miniature circuit breaker body and transmit an analog current signal to the first control unit. The voltage sampling unit is configured to sample voltage on the connection side of the miniature circuit breaker body and transmit an analog voltage signal to the first control unit. The first optical signal transmitting unit is configured to convert an electrical miniature circuit breaker body control signal transmitted by the first control unit into an optical signal and transmit it to the electric operation module. The first optical signal receiving unit is electrically connected to the electric operation module and is configured to receive a status signal of the electric operation module and an optical status signal of the miniature circuit breaker body, and convert the signal into an electrical signal and transmit it to the first control unit. The wireless communication unit is configured to communicate externally. The first control unit is configured to transmit a control command to the electric operation module for controlling the miniature circuit breaker body. The first control unit also communicates wirelessly with the outside world via the wireless communication unit. The first power supply unit provides power to each of the above units.

[0009] In another specific embodiment of the present invention, the measurement and control module is provided with a light guide hole on the side wall of the base, the electric operation module has a shell, and the shell is provided with a light guide support on the outer wall. The light guide support is constructed as a hollow boss, and the boss is inserted into the light guide hole of the measurement and control module to achieve limited assembly.

[0010] In another specific embodiment of the present invention, the electric operation module further includes a control handle, and a drive motor, a transmission gear and a tripping structure installed in the housing. The drive motor is interlocked with the transmission gear, the transmission gear is interlocked with the control handle, and the control handle is interlocked with the operating handle of the miniature circuit breaker body to realize the electric closing and opening actions of the miniature circuit breaker body; the tripping structure is interlocked with the tripping mechanism of the miniature circuit breaker body to identify the tripping state of the miniature circuit breaker body.

[0011] In another specific embodiment of the present invention, the electric operation module is further provided with a second circuit board in the shell, and the second circuit board is provided with a second control unit, a position feedback unit, a motor drive unit, a second optical signal sending unit, a second optical signal receiving unit and a second power supply unit. The second power supply unit draws power from the measurement and control module and provides working power to the above-mentioned units after conversion; the second control unit is connected to the position feedback unit to receive the position signal of the control handle and the tripping structure fed back by the position feedback unit; the second control unit is connected to the motor drive unit to control the forward, reverse and stop of the drive motor through the motor drive unit; the second control unit is connected to the second optical signal sending unit, which converts the electric operation module status signal and the miniature circuit breaker body status electrical signal sent by the second control unit into an optical signal and transmits it to the first optical signal receiving unit of the measurement and control module; the second control unit is connected to the second optical signal receiving unit, which converts the command optical signal for controlling the miniature circuit breaker body transmitted by the measurement and control module into an electrical signal and transmits it to the second control unit.

[0012] In a further specific embodiment of the present invention, the optical signal is an infrared light signal.

[0013] Due to the adoption of the above-mentioned structure, the present invention has the following beneficial effects compared with the prior art: the measurement and control module is installed on the wiring side of the miniature circuit breaker body and can independently complete current and voltage sampling operations; the electric operation module can control and provide feedback on the status of the miniature circuit breaker body; data transmission between the measurement and control module and the electric operation module is carried out via optical signals, thus having strong anti-interference capability; the overall volume of the product is reduced by the rational layout of the miniature circuit breaker body, the measurement and control module, and the electric operation module; in intelligent transformation applications, the module can be directly installed on the original miniature circuit breaker body without changing the distribution circuit, thereby quickly realizing the measurement and upload of the power distribution circuit electricity, as well as the control and monitoring of the status of the miniature circuit breaker body, and the original miniature circuit breaker body can continue to be used, saving replacement time and reducing replacement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the assembly of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the measurement and control module of the present invention;

[0017] Figure 4This is a structural diagram of the electric operation module of the present utility model;

[0018] Figure 5 This is a circuit block diagram of the utility model.

[0019] In the figure: 1. Miniature circuit breaker body, 11. Wiring hole, 12. Operating handle; 2. Measurement and control module, 21. Housing, 211. Top cover, 212. Base, 2121. Light guide hole, 22. First circuit board, 221. First control unit, 222. Current sampling unit, 223. Voltage sampling unit, 224. First optical signal transmitting unit, 225. First optical signal receiving unit, 226. Wireless communication unit, 227. First power supply unit, 23. Threading hole, 231. Threading support; 3. Electric operation module, 31. Housing, 311. Light guide support, 32. Control handle, 33. Drive motor, 34. Transmission gear, 35. Tripping structure, 36. Second circuit board, 361. Second control unit, 362. Position feedback unit, 363. Motor drive unit, 364. Second optical signal transmitting unit, 365. Second optical signal receiving unit, 366. Second power supply unit. DETAILED DESCRIPTION

[0020] The specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings. However, the description of the embodiments does not limit the technical solution. Any changes in form rather than substance based on the concept of the present invention should be regarded as within the scope of protection of the present invention.

[0021] In the following description, all concepts related to directionality (or orientation) such as up, down, left, right, front and back are with respect to the position state of the figure being described, and are intended to facilitate public understanding. Therefore, they should not be understood as special limitations on the technical solutions provided by the present invention.

[0022] See also Figure 1 The present invention relates to a modular intelligent miniature circuit breaker, comprising a miniature circuit breaker body 1, a measurement and control module 2, and an electric operation module 3. The measurement and control module 2 is mounted on the top connection side of the miniature circuit breaker body 1 (either the incoming or outgoing side), and the electric operation module 3 is mounted on the side of the miniature circuit breaker 1. The measurement and control module 2 is used to send instructions for controlling the miniature circuit breaker body 1 to the electric operation module 3; the electric operation module 3 is used to send its own status signal and miniature circuit breaker body status signal to the measurement and control module 2, and can operate the miniature circuit breaker body 1. Data transmission between the measurement and control module 2 and the electric operation module 3 is performed via optical signals, which have strong anti-interference capabilities. In this embodiment, the optical signal is an infrared light signal.

[0023] See Figure 2 and Figure 3 The measurement and control module 2 includes a housing 21 and a first circuit board 22 mounted within the housing 21. The housing 21 comprises a top cover 211 and a base 212. Each of the top cover 211, the first circuit board 22, and the base 212 is provided with threading holes 23 for the main circuit wires to pass through and connect to the wiring holes 11 of the miniature circuit breaker body 1. To reduce size, the first circuit board 22 can be split into two stacked circuit boards mounted within the housing 21. Both circuit boards are provided with the threading holes 23. Specifically, the upper cover 211, the first circuit board 22, and the wiring holes 23 of the base 212 are aligned. A hollow wiring support 231 extends downward from the wiring hole 23 of the upper cover 211. The wiring support 213 passes through the wiring hole 23 of the first circuit board 22 and connects to the wiring hole 23 of the base 212. The main circuit wire passes through the wiring support 231 and then connects to the wiring hole 11 of the miniature circuit breaker body 1, making wiring harness arrangement more convenient. The measurement and control module 2 has a light guide hole 2121 on the side wall of the base 212 for the passage of optical signals.

[0024] See Figure 5The first circuit board 22 is provided with a first control unit 221, a current sampling unit 222, a voltage sampling unit 223, a first optical signal transmitting unit 224, a first optical signal receiving unit 225, a wireless communication unit 226, and a first power supply unit 227. The first control unit 221 is electrically connected to the current sampling unit 222, the voltage sampling unit 223, the first optical signal transmitting unit 224, and the first optical signal receiving unit 225, respectively. It receives signals from the current sampling unit 222, the voltage sampling unit 223, and the optical signal receiving unit 224, performs internal control operations, and then issues instructions to the electric operation module 3 to control the miniature circuit breaker body 1. Specifically, the current sampling unit 222 is used to sample the current flowing through the miniature circuit breaker body 1 and send an analog signal of the current to the first control unit 221. The voltage sampling unit 223 is used to sample the voltage on the connection side of the miniature circuit breaker body 1 and send an analog signal of the voltage to the first control unit 221. The first optical signal sending unit 224 is used to convert the miniature circuit breaker body control electrical signal sent by the first control unit 221 into an optical signal and send it to the electric operation module 3. The first optical signal receiving unit 225 is electrically connected to the electric operation module 3 and is used to receive its own status signal and the miniature circuit breaker body status optical signal sent by the electric operation module 3, and convert it into an electrical signal and send it to the first control unit 221. The wireless communication unit 226 is used for external communication. The first control unit 221 is used to send instructions to the electric operation module 3 to control the miniature circuit breaker body 1. The first control unit 221 also implements wireless communication with a gateway, a host computer, etc. through the wireless communication unit 226. The first power supply unit 227 is electrically connected to the first control unit 221, the current sampling unit 222, the voltage sampling unit 223, the first optical signal sending unit 224, the first optical signal receiving unit 225 and the wireless communication unit 226. It directly draws power from the wiring side of the miniature circuit breaker body 1 and provides working power to the above-mentioned units after conversion.

[0025] See Figures 2 to 5 The electric operation module 3 includes a housing 31 and a control handle 32. A drive motor 33, a transmission gear 34, and a tripping mechanism 35 are mounted within the housing 31. A light guide support 311 is provided on the outer wall of the housing 31. The light guide support 311 is configured as a hollow boss that is inserted into the light guide hole 2121 of the measurement and control module 2 to achieve position-limited assembly. The drive motor 33 is interlocked with the transmission gear 34, which in turn is interlocked with the control handle 32. The control handle 32 is interlocked with the operating handle 12 of the miniature circuit breaker body 1 to achieve electric closing / opening of the miniature circuit breaker body 1. The tripping mechanism 35 is interlocked with the tripping mechanism of the miniature circuit breaker body 1.

[0026] Furthermore, the tripping mechanism of the miniature circuit breaker body 1 is a well-known mechanism, generally comprising a trip unit, a contact system, a transmission mechanism, etc., which performs a tripping operation, thereby automatically disconnecting the miniature circuit breaker body 1. In this embodiment, the tripping action of the miniature circuit breaker body 1 is sensed by the electric operating module 3 via the tripping structure 35, thereby detecting the tripping state of the miniature circuit breaker body 1. When it is detected that the position of the control handle 32 is in the first position, the operating handle 12 of the miniature circuit breaker body 1 is in the closing position, thereby judging that the miniature circuit breaker body 1 is in the closing state; when it is detected that the position of the control handle 32 is in the second position, the operating handle 12 of the miniature circuit breaker body 1 is in the opening position, thereby judging that the miniature circuit breaker body 1 is in the opening state; when it is detected that the position of the tripping structure 35 changes, it is judged that the miniature circuit breaker body 1 is in the tripping state; when it is detected that the control handle 32 is not in the first position or the second position within a certain period of time, it is judged that the intelligent miniature circuit breaker is in a fault state (which may be a fault such as a fault in the drive motor 33 of the electric operation module 3 or a jam of the transmission gear 34, or a jam of the operating handle 12 of the miniature circuit breaker body 1); otherwise, it is in a normal state.

[0027] Furthermore, a second circuit board 36 is mounted within the housing 31. This second circuit board 36 is equipped with a second control unit 361, a position feedback unit 362, a motor drive unit 363, a second optical signal transmitting unit 364, a second optical signal receiving unit 365, and a second power supply unit 366. The second power supply unit 366 draws power from the measurement and control module 2 and, after conversion, provides operating power to each of the aforementioned units. The second control unit 361 is connected to the position feedback unit 362 and receives position signals from the control handle 32 and the tripping mechanism 35 to determine whether the miniature circuit breaker 1 is in the open, closed, or tripped state. The second control unit 361 is connected to the motor drive unit 363, which controls the forward, reverse, and stop rotation of the drive motor 33. The drive motor 33, via the transmission gear 34 and the control handle 32, drives the operating handle 12 of the miniature circuit breaker 1 to close and open the circuit breaker. The second control unit 361 is connected to the second optical signal transmitting unit 364. The second optical signal transmitting unit 364 converts the electric operation module status signal and the miniature circuit breaker body status electrical signal sent by the second control unit 361 into an optical signal and transmits it to the first optical signal receiving unit 225 of the measurement and control module 2. The second control unit 361 is connected to the second optical signal receiving unit 365. The second optical signal receiving unit 365 converts the command optical signal transmitted by the measurement and control module 2 for controlling the miniature circuit breaker body 1 into an electrical signal and transmits it to the second control unit 361.

[0028] This embodiment achieves a smaller overall size through the rational layout of the miniature circuit breaker body 1, the measurement and control module 2, and the electric operation module 3. Furthermore, in intelligent retrofit applications, the measurement and control module 2 and the electric operation module 3 can be directly installed on the existing miniature circuit breaker body 1 without modifying the power distribution circuit. This allows for rapid measurement and upload of power distribution circuit electricity, as well as control and monitoring of the status of the miniature circuit breaker body 1, improving replacement efficiency. The existing miniature circuit breaker body can continue to be used, saving replacement costs.

Claims

1. A modular intelligent miniature circuit breaker, characterized by: The invention comprises a miniature circuit breaker body (1), a measurement and control module (2) and an electric operation module (3); the measurement and control module (2) is installed on the connection side of the miniature circuit breaker body (1), and the electric operation module (3) is installed on the side of the miniature circuit breaker body (1); the measurement and control module (2) is used to send instructions for controlling the miniature circuit breaker body (1) to the electric operation module (3); the electric operation module (3) is used to send its own status signal and the miniature circuit breaker body status signal to the measurement and control module (2) and operate the miniature circuit breaker body (1); data transmission is carried out between the measurement and control module (2) and the electric operation module (3) via optical signals.

2. The modular intelligent miniature circuit breaker according to claim 1, characterized in that: The measurement and control module (2) comprises a housing (21) and a first circuit board (22) installed in the housing (21); the housing (21) comprises an upper cover (211) and a base (212); the upper cover (211), the first circuit board (22) and the base (212) are all provided with wire holes (23) for passing a main circuit wire through and then connecting to the wiring hole (11) of the miniature circuit breaker body (1).

3. The modular intelligent miniature circuit breaker according to claim 2, characterized in that: The first circuit board (22) is provided with a first control unit (221), a current sampling unit (222), a voltage sampling unit (223), a first optical signal sending unit (224), a first optical signal receiving unit (225), a wireless communication unit (226) and a first power supply unit (227); the first control unit (221) is electrically connected to the current sampling unit (222), the voltage sampling unit (223), the first optical signal sending unit (224) and the first optical signal receiving unit (225), respectively; the current sampling unit (222) is used to sample the current flowing through the miniature circuit breaker body (1) and send an analog signal of the current to the first control unit (221). ), the voltage sampling unit (223) is used to sample the voltage on the connection side of the miniature circuit breaker body (1) and send the analog signal of the voltage to the first control unit (221), the first optical signal sending unit (224) is used to convert the miniature circuit breaker body control electric signal sent by the first control unit (221) into an optical signal and send it to the electric operation module (3), the first optical signal receiving unit (225) is electrically connected to the electric operation module (3), and is used to receive the state signal of the electric operation module (3) and the state optical signal of the miniature circuit breaker body, and convert it into an electric signal and send it to the first control unit (221), the wireless communication unit (226) is used for external communication, the first control unit (221) is used to send an instruction to control the miniature circuit breaker body (1) to the electric operation module (3), the first control unit (221) also communicates wirelessly with the outside through the wireless communication unit (226), and the first power supply unit (227) supplies power to the above-mentioned units.

4. The modular intelligent miniature circuit breaker according to claim 2, characterized in that: The measuring and control module (2) is provided with a light guide hole (2121) on the side wall of the base (212); the electric operation module (3) has a housing (31); the housing (31) is provided with a light guide support (311) on the outer side wall; the light guide support (311) is configured as a hollow boss, which is correspondingly inserted into the light guide hole (2121) of the measuring and control module (2) to achieve limited assembly.

5. The modular intelligent miniature circuit breaker according to claim 4, characterized in that: The electric operation module (3) further comprises a control handle (32), a drive motor (33), a transmission gear (34) and a tripping structure (35) installed in the housing (31); the drive motor (33) and the transmission gear (34) are arranged in a linkage arrangement; the transmission gear (34) and the control handle (32) are arranged in a linkage arrangement; the control handle (32) and the operating handle (12) of the miniature circuit breaker body (1) are arranged in a linkage arrangement to realize the electric closing and opening actions of the miniature circuit breaker body (1); and the tripping structure (35) and the tripping mechanism of the miniature circuit breaker body (1) are arranged in a linkage arrangement to identify the tripping state of the miniature circuit breaker body (1).

6. The modular intelligent miniature circuit breaker according to claim 5, characterized in that: The electric operation module (3) is further provided with a second circuit board (36) in the housing (31); the second circuit board (36) is provided with a second control unit (361), a position feedback unit (362), a motor drive unit (363), a second optical signal sending unit (364), a second optical signal receiving unit (365) and a second power supply unit (366); the second power supply unit (366) takes power from the measurement and control module (2) and provides working power to the above-mentioned units after conversion; the second control unit (361) is connected to the position feedback unit (362) to receive the position signal of the control handle (32) and the tripping structure (35) fed back by the position feedback unit (362); the second control unit (361) is connected to the motor drive unit (363 ... The first optical signal receiving unit (225) of the measuring and control module (2) is connected to the first optical signal receiving unit (365), and the second optical signal receiving unit (365) converts the instruction optical signal for controlling the miniature circuit breaker body (1) transmitted by the measuring and control module (2) into an electrical signal.

7. The modular intelligent miniature circuit breaker according to claim 5, characterized in that: The optical signal is an infrared light signal.

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