CN112768277A

CN112768277A - Intelligent circuit breaker emergency stop device

Info

Publication number: CN112768277A
Application number: CN202110028852.1A
Authority: CN
Inventors: 张进; 袁高普; 施长云
Original assignee: Jiaxing Jingsi Intelligent Technology Co ltd
Current assignee: Shanghai Jingsi Intelligent Technology Co ltd
Priority date: 2021-01-11
Filing date: 2021-01-11
Publication date: 2021-05-07
Anticipated expiration: 2041-01-11
Also published as: CN112768277B

Abstract

The embodiment of the invention discloses an intelligent circuit breaker emergency stop device, which comprises a mechanical switch and an electronic solid-state switch device, wherein the mechanical switch and the electronic solid-state switch device are connected in series and can be controlled by an MCU (micro control unit), the circuit breaker emergency stop device comprises an emergency stop button and an emergency stop microswitch, the emergency stop button is used for triggering the emergency stop microswitch to send a signal to disconnect the electronic solid-state switch device in advance when in maintenance or emergency, and then the mechanical switch is disconnected by driving a closing lock catch of the mechanical switch to be separated from a handle of a closing operation mechanism of the circuit breaker. The circuit breaker provided by the embodiment of the invention is convenient for processing an emergency state and improves the safety.

Description

Intelligent circuit breaker emergency stop device

Technical Field

The embodiment of the invention relates to the technical field of circuit breakers, in particular to an intelligent circuit breaker emergency stop device.

Background

The circuit breaker is a switching device capable of closing, carrying and breaking a current under a normal circuit condition and closing, carrying and breaking a current under an abnormal circuit condition within a prescribed time, and can distribute electric energy and protect a power line, a motor and the like, and automatically cut off a circuit when a fault such as severe overload or short circuit and undervoltage occurs, and thus is widely applied to power electronic systems. Ordinary circuit breaker is pure mechanical type structure, has the electric arc problem, and can not scram during the trouble, and the product has the safety risk. In view of the above, there is a need to improve the defects of the existing circuit breaker products to meet the market demand.

Disclosure of Invention

The invention aims to provide an intelligent circuit breaker emergency stop device, which aims to solve the problems in the prior art and further optimize other performances of products on the basis.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

the intelligent circuit breaker emergency stop device comprises a mechanical switch and an electronic solid-state switch device which are connected in series and can be controlled by an MCU (micro control unit), wherein the circuit breaker emergency stop device comprises an emergency stop button and an emergency stop microswitch, the emergency stop button is used for triggering the emergency stop microswitch to send a signal to disconnect the electronic solid-state switch device in advance when in maintenance or emergency, and then the mechanical switch is disconnected by driving a closing lock catch of the mechanical switch to be separated from a handle of a closing operation mechanism of the circuit breaker.

Compared with the prior art, the embodiment of the invention is provided with the emergency button and the corresponding solid-state electronic device micro switch, and the micro switch is triggered to disconnect the solid-state electronic device in advance and then the mechanical breakpoint is disconnected in the disconnection process, so that the mechanical breakpoint is firstly closed and then disconnected, the arc-free disconnection is realized, the service life of a product is prolonged, the safety of personnel and a system is protected in case of failure, the emergency state is convenient to process, and the safety is improved.

Drawings

Fig. 1 is a diagram of a circuit breaker system architecture according to an embodiment of the present invention;

fig. 2 is a diagram of a circuit breaker electronics system according to an embodiment of the present invention;

fig. 3a is a layout view of a front direction mechanism of the circuit breaker according to the embodiment of the invention;

FIG. 3b is a layout view of a rear directional mechanism of the circuit breaker according to an embodiment of the present invention;

FIG. 3c is a side view of the circuit breaker of the present invention;

fig. 4 is an exploded view of a circuit breaker according to an embodiment of the present invention;

fig. 5a is a first schematic view of a circuit breaker housing mask according to an embodiment of the present invention;

fig. 5b is a schematic view of a circuit breaker housing mask of an embodiment of the invention;

figure 6 is a partial schematic view of a circuit breaker housing base according to an embodiment of the present invention;

fig. 7 is a partial schematic view of an upper cover of a circuit breaker housing according to an embodiment of the present invention;

fig. 8 is an assembly view of a closing operation mechanism, a moving contact and a mask of the circuit breaker according to the embodiment of the present invention;

FIG. 9 is an assembly view of a circuit breaker handle with a moving contact and a contact compression spring in accordance with an embodiment of the present invention;

fig. 10a is a first schematic view of a circuit breaker handle according to an embodiment of the present invention;

FIG. 10b is a second schematic view of a circuit breaker handle according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of a movable contact of a circuit breaker according to an embodiment of the present invention;

fig. 12 is a schematic view of an operating button of the circuit breaker according to an embodiment of the present invention;

fig. 13 is a partial schematic view of a closing process of a circuit breaker according to an embodiment of the invention;

fig. 14 is a state diagram of a shutdown mechanism when the circuit breaker is switched on according to an embodiment of the present invention;

fig. 15 is a cross-sectional view of a relevant mechanism when the circuit breaker is closed according to an embodiment of the invention;

fig. 16 is a state diagram of the shutdown mechanism when the circuit breaker is opened according to the embodiment of the invention;

fig. 17 is an assembly view of the mechanism associated with the trip protection device of the circuit breaker in accordance with the present invention;

fig. 18 is an assembly view of a mechanism associated with an emergency stop device of a circuit breaker and a visor in accordance with an embodiment of the present invention;

fig. 19 is a schematic diagram of an emergency stop button of the circuit breaker according to an embodiment of the present invention;

fig. 20 is an assembly view of the mechanism and the mask associated with the initial state of the circuit breaker opening locking device according to the embodiment of the present invention;

fig. 21 is a schematic view of an opening lock of an embodiment of the circuit breaker of the present invention;

fig. 22 is a state diagram of a time-phase mechanism when the opening locking device of the circuit breaker is locked according to the embodiment of the invention;

fig. 23 is a state diagram of a related machine head when the circuit breaker opening locking device is unlocked according to the embodiment of the invention;

fig. 24 is a state diagram of a mechanism associated with a fixed unlocking device when the circuit breaker is installed in a cabinet according to an embodiment of the present invention;

fig. 25 is a state diagram of a mechanism related to a fixed unlocking device when the circuit breaker is pulled out of the cabinet according to the embodiment of the invention;

fig. 26 is a schematic view of a circuit breaker cabinet lock according to an embodiment of the present invention;

fig. 27 is a schematic diagram of a circuit breaker wiring communication module according to an embodiment of the invention;

fig. 28 is a schematic diagram of a line inlet terminal structure of a circuit breaker according to an embodiment of the invention;

fig. 29 is a schematic diagram of a circuit breaker connection spring in an embodiment of the invention;

fig. 30 is a schematic diagram of an outlet terminal structure of the circuit breaker according to the embodiment of the invention;

fig. 31 is an assembly view of the mechanism associated with the circuit breaker detection indicator system in accordance with the exemplary embodiment of the present invention;

fig. 32 is an assembly view of a circuit breaker heat sink in accordance with an embodiment of the present invention;

fig. 33 is a partial assembly view of a circuit breaker heat sink in accordance with an embodiment of the present invention.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Fig. 1 to 33 respectively show the main system, device, mechanism, module and component structure and assembly relationship of the circuit breaker according to the embodiment of the invention, and the detailed description is as follows.

As shown in fig. 1, the system architecture of the hybrid circuit breaker of the embodiment of the invention includes a mechanical system S100, an electronic system S200 and a wiring system S300, wherein the mechanical system S100 has a mechanical switch, the electronic system S200 includes a power portion configured with an electronic solid state switching device and a control portion configured with an MCU, the electronic solid state switching device is connected in series with the mechanical switch of the mechanical system, and the MCU can output a control signal of the electronic solid state switching device to control the operation of the electronic solid state switching device.

The circuit breaker is provided with the single chip microcomputer MCU to monitor the circuit breaker, and the circuit breaker is convenient to integrate the self-checking of an electronic solid-state switch device, the self-checking of a mechanical switch and the self-checking of an emergency switch through optimizing time sequence control/logic control so as to realize a full-function self-checking mechanism. Meanwhile, fault points can be uploaded in real time, the state machine control is adopted to clearly monitor the state change of the whole circuit breaker, the online/offline configuration parameters are conveniently expanded and supported, the adjustability of overload, overcurrent, overvoltage, overtemperature protection curves and the like is realized, and the functions of electric quantity measurement/metering, automatic communication networking and the like are realized. Therefore, the embodiment of the invention is an intelligent circuit breaker.

The whole and sub-systems, mechanisms, devices and parts of the preferred embodiment of the present invention are described in detail below, and all of them may constitute separate technical solutions, and it should be understood that one or more of them may be selected for use in combination according to the application scenario when a product is specifically manufactured.

Electronic system

The common circuit breaker is a pure mechanical switch, and has the arcing problem; and a few mechanical and electronic hybrid switches are adopted, but the structure is more complex, and the circuit breaker is only suitable for large-scale alternating current circuit breakers.

The embodiment of the invention is improved, the general structure of the invention adopts a combination type of a mechanical switch and an electronic solid-state switch device, wherein the electronic system is provided with the electronic solid-state switch device which is connected with a mechanical breakpoint in series, and is provided with the MCU for control, so that the mechanical and electronic double fault protection can be realized, the structure is simpler, and the invention can be suitable for an AC/DC miniature circuit breaker.

As shown in fig. 2, the circuit breaker electronics system architecture is designed as: the power stage and the control stage are combined, and the power stage and the control stage are specifically described below.

1. Power section design

(1) And the mechanical switch Ki is provided with an auxiliary contact and feeds back the on-off state in real time. Preferably, the mechanical switch Ki is provided with a mechanical emergency stop button device Ke with a displacement sensor, which allows real-time detection of the state.

(2) The electronic solid state switch device (SSK) is composed of electronic devices such as an MOSFET (metal-oxide-semiconductor field effect transistor) or an IGBT (insulated gate bipolar transistor), is connected with the mechanical switch in series, is matched with the mechanical switch for use, has quick response of the solid state switch, and is favorable for avoiding electric arc.

(3) The electromagnetic tripping Trig and the driving circuit FET _ Trig thereof are configured on the mechanical switch, and the movable iron core of the electromagnetic tripping mechanism is connected with the closing lock catch of the closing locking mechanism, so that the electromagnetic tripping control signal is output by the MCU to directly switch off the mechanical switch during fault.

Preferably, a sampling resistor Rs (current is I _ s) is arranged between the mechanical switch Ki and the electronic solid-state switching device SSK to feed back the current in real time. In addition, a current-limiting inductor Ldi is arranged between the mechanical switch Ki and the electronic solid-state switching device SSK, and is connected in parallel with a resistor (current is I _ in) to limit the current ramp rate (Ldi/dt), so that the circuit can be quickly (within 10 μ s, for example) broken in case of short circuit by using its quick breaking capability and quick detection circuit, thereby controlling/limiting the circuit current.

Further, the power part is provided with temperature-sensitive sensors Rt1, Rt2, Rt3 and the like, which are distributed at the terminal positions PA and PB of the circuit breaker and the internal hot spot position of the circuit breaker for monitoring the temperature in real time. The temperature detection and monitoring are adopted for the wiring ends at two ends of the circuit breaker, and the data are collected timely and uploaded to the client, so that a client can timely control the operation of a product and a system, know risks in advance and timely remove faults.

2. Design of control part

(1) The MCU is internally provided with an I/O port, a digital-to-analog converter ADC, a synchronous asynchronous transmitter USART and the like, is used as a core component of the control part, and can output control signals of the electronic solid-state switching device to control the action of the electronic solid-state switching device. The ADC receives analog signals such as a voltage signal (Vin), current feedback signals (I _ n, I _ s,) temperature signals (T _ T1, T _ T2, T _ T3, corresponding to temperature-sensitive sensors Rt1, Rt2, Rt3 and the like) and converts the analog signals into digital signals. The MCU has a built-in USART to constitute a communication unit COM, thereby realizing digital communication. In addition, the MCU is connected with the memory EEPROM so as to bidirectionally control data and record/call data, so that the circuit breaker has the technical data storage/memory/analysis function, historical data of the circuit breaker is stored in the EEPROM, and certain characteristic quantities can be compared with the historical data, thereby being convenient for realizing early warning and active protection; in addition, the MCU is also connected with an LED lamp for controlling the LED lamp to indicate the complete machine state of the circuit breaker.

(2) The hardware protection circuit (hardware protection) is triggered by combining the current climbing rate Ldi/dt and the actual load current, and when the current climbing rate Ldi/dt and the actual load current are both higher than a threshold value, the hardware protection circuit is triggered to directly block a gate control signal of the solid-state switch (set low), so that the whole response time can be completed within tens of ns, and the electronic solid-state switch device can be conveniently controlled to rapidly enter a soft turn-off state under the condition of output short circuit so as to limit the overvoltage of the circuit.

Preferably, in the embodiment of the present invention, the detection signal of the operating state of the circuit breaker is obtained, where the signal input and output mode is: analog signals such as voltage, current and temperature are sent to the MCU and the hardware protection circuit, other sensor signals (such as contact position signals and emergency stop position signals) are fed back and sent to the MCU to participate in logic control, an electromagnetic tripping control signal (DRV _ trig) is controlled by the MCU, and an electronic solid-state switching device control signal (DRV _ ssk) is controlled by a logic combination (DRV-logic) of an output signal of the hardware protection circuit and an output signal of the MCU to realize double protection. Preferably, the invention also monitors the circuit breaker control signal and the detection signal at regular time, refreshes the circuit breaker running state, and locally stores the corresponding data or uploads the corresponding data, so that a user can conveniently control the running state of the product and the system, and can know the risk in advance and remove the fault in time.

Two, mechanical system

1. Overall structure

Aiming at the problems of arcing and the like of the existing products, the embodiment of the invention adopts a mode of combining the control of a mechanical contact and an electronic solid-state switching device, and sets a mechanical breakpoint and an auxiliary electromagnetic tripping mechanism which are formed by connecting the electronic solid-state switching device in series, thereby being capable of avoiding electric arc generation, ensuring a safe and visible mechanical breakpoint and improving response speed and breaking capacity.

The circuit breaker product provided by the embodiment of the invention is provided with a mechanical system and an electronic system, wherein the electronic system is provided with an electronic solid-state switching device controlled by an MCU, the mechanical system is provided with a mechanical switch and an electromagnetic tripping mechanism, the mechanical switch is connected with the electronic solid-state switching device in series, the electronic solid-state switching device is used for realizing soft turn-off of an electric system, and the electromagnetic tripping mechanism is used for realizing hard turn-off of the electric system by driving the mechanical switch to be switched off.

As shown in fig. 3a to 3C, the circuit breaker is provided with devices, mechanisms, modules or parts, such as a housing a, an outlet terminal module B, an inlet terminal module C, an operating button mechanism D, a closing operating mechanism E, an emergency stop button mechanism F, an opening locking device G, a fixed unlocking device H, a closing locking mechanism I, a contact system J, an electronic module K, a communication module L, an electromagnetic trip mechanism M, a state indication module N, a quick connection module P, an emergency stop and opening module Q, a heat dissipation module R, a contact detection module S, and the like, on a mechanical structure.

As shown in FIG. 4, the apparatus and mechanism of embodiments of the present invention are generally formed from a combination of components, as described below.

The shell A consists of a face shield A01, a base A02 and an upper cover A03, and is provided with a plurality of holes, grooves or positioning plates (blocks) and the like so as to provide a mounting base for other parts.

The outlet terminal module B is provided with a wiring board B01 and a wiring board B02 which have the same structure, and external wires can be connected with the wiring boards.

The incoming line end module C has two incoming line modules with the same structure, namely a negative incoming line module C01 and a positive incoming line module C02, wherein binding clips are respectively arranged to clamp the connected electrodes or wires.

The operating button mechanism D comprises an operating button D01 and a button pressure spring D02, is linked with the closing operating mechanism E and is used for controlling the closing operating mechanism E.

The closing operation mechanism E comprises a handle E01, a handle pressure spring E02, a moving contact and a contact pressure spring which are provided with the mechanical switch, and a closing lock catch which can be connected or separated for controlling the mechanical switch to close or open.

The emergency stop button mechanism F comprises an emergency stop button F01 and an emergency stop pressure spring F02, and is matched with the operating button mechanism D, the closing operating mechanism E, the closing locking mechanism I and the like, and is used for emergency opening and closing in an emergency or maintenance state.

The opening locking device G comprises an opening locking piece G01 and a rotating shaft G02 torsion spring G03, and the opening locking device is matched with the functions of an operating button mechanism D, a closing operating mechanism E, a closing locking mechanism I and the like, so that the closing operating mechanism E is locked during opening, and closing before a circuit breaker is installed in a cabinet of a power distribution cabinet is prevented.

The fixed unlocking device H comprises a cabinet locking piece H01 and a rotating shaft G02 torsion spring G03, and is matched with the action of an operation button mechanism D and a closing operation mechanism E, when the breaker is installed in a power distribution cabinet, the breaker and the power distribution cabinet are locked, and the breaker is prevented from being abnormally pulled out when the closing is electrified; the circuit breaker can be pulled out only when the circuit breaker is unlocked.

The closing locking mechanism I comprises a closing lock I01, a lock shaft I02 and the like, and is used for locking the closing operating mechanism E during closing so that the mechanical switch keeps a connected state.

The contact system J comprises a moving contact J01, a static contact J02 and a contact pressure spring J03, wherein when the moving contact J01 and the static contact J02 are contacted, a mechanical switch is switched on, and when the mechanical switch is switched on, the contact pressure spring J03 provides necessary contact pressure; otherwise, the circuit is switched off.

The electronic module K is configured with components such as the electronic solid-state switching device SSK and the MCU, which are specifically referred to above.

The communication module L, which is arranged at the incoming line end of the circuit breaker, comprises a module base L01, in which two flexible terminal clamps L02 and L03 are arranged for communication wiring.

The electromagnetic tripping mechanism M comprises a movable iron core, an electromagnetic coil, a magnetic spring and the like, and controls the closing locking mechanism I to be separated from the closing operating mechanism E to turn off the mechanical switch when a fault occurs.

The state indicating module N comprises an LED lamp N02 and is arranged on the contact detecting circuit board N01 together with the contact position detecting microswitch S01, is used for indicating the working state of an electronic solid-state switch device on the electronic module and provides convenience for maintenance and overhaul.

The quick connection module P comprises a wiring elastic sheet P01 and a wiring elastic sheet P02 which have the same structure and are used for quickly inserting external wires and being in close contact with corresponding wiring boards.

The sudden stop breaking module Q comprises a sudden stop microswitch Q02 mounted on a PCB (printed circuit board) Q01, and triggers a signal to a system to control the electronic solid-state switch device to be turned off when in sudden stop.

And the heat dissipation module R is used for providing heat dissipation measures for the circuit breaker.

And the contact detection module S comprises a contact position detection micro switch S01 which is arranged on the contact detection circuit board N01 together with the LED lamp N02 and is used for displaying the on-off state of the mechanical switch and the working state of the electronic solid-state device through detecting the position of the contact and through the LED lamp N02.

The circuit breaker obtains an electromechanical combined hybrid circuit breaker product by optimizing the design scheme of the mechanical part and the electronic part, and has more outstanding performance, particularly including but not limited to the following aspects.

(1) The electronic solid-state switching device and the mechanical switch are mixed. The electronic module K uses an electronic solid-state switch device (MOSFET/IGBT) which is arranged in the electronic module K to be connected with a mechanical breakpoint of a mechanical switch in series for use, and can carry out shunt control on each branch of a power distribution cabinet provided with the circuit breaker. Compared with the traditional circuit breaker, the intrinsic overheating double-gold mechanism and the short-circuit electromagnetic snap-action structure are removed and replaced by the electronic module K, so that the response time is reduced from millisecond level to microsecond level, and the electronic solid-state switching device can rapidly respond to turn-off and realize arc-free breaking because the response time is far faster than that of a mechanical component. And after the electronic solid-state switching device is turned off, the mechanical contact system J does not need to be disconnected, and the electronic solid-state switching device can be remotely closed without manual reset after a fault is generated and eliminated.

(2) The MCU is configured for control. After the MCU is arranged and the parts such as the memory, the communication module and the like are configured, the control is more flexible and convenient, and the control mode of the electronic device can be optimized. The MCU is configured with a hardware protection circuit, can absolutely protect the positive and negative connection (such as overload) of a load and a power supply end, and once the positive and negative connection is identified, a signal is sent to start the electromagnetic tripping mechanism M, so that a mechanical breakpoint is disconnected, and further damage to equipment and the load is avoided.

(3) And arranging a tripping protection device. On one hand, a mechanical breakpoint connected with an electronic solid-state switching device in series and an attached electromagnetic tripping mechanism M are arranged, and a safe visible mechanical breakpoint is ensured by disconnecting a closing operation mechanism E when a fault occurs. On the other hand, an emergency stop device is further arranged, the pure mechanical existence of the emergency stop device can ensure safe and reliable disconnection of mechanical breakpoints, and another microswitch is triggered to disconnect the electronic solid-state device in advance in the process of pressing an emergency stop button, so that the mechanical breakpoints are prevented from being broken in an electrified way, and electric arcs are avoided. In this way, the presence of the mechanical break point and its attachment can serve a double protection function, thereby preventing a single point of failure.

(4) And a brake separating locking device is arranged. The breaker is prevented from being switched on in advance when not being inserted into a power distribution cabinet or not being plugged in place, and the safety of the breaker and a power utilization system is ensured. When the breaker is in an opening state, an opening locking piece on the opening locking device G can block a locking lug of a handle of a closing operation mechanism, so that the breaker cannot be closed. Only after the product is inserted in place, the opening locking device G is in a pressing-down state, the locking boss of the opening locking piece is not located on the path of the locking projection of the handle of the closing operation mechanism, and the circuit breaker can be freely closed. After the closing operation mechanism E drives the moving contact system J to be in place, the closing locking mechanism I is buckled with the closing operation mechanism E, so that the mechanical breaking point is closed and is in a holding state.

(5) A fixed unlocking device is provided. The breaker is prevented from being abnormally pulled out when the breaker is switched on and is inserted into the cabinet of the power distribution cabinet, and accidents are avoided. When the product is in a closing state, the operating button mechanism D is flush with the front end face of the shell A, and the operating button mechanism D can be pulled out without a force point. Only when the product is in the separating brake state, the operating button mechanism D can protrude out of the front end face of the shell A, and the operating button and the handle which are linked can be pulled out at the moment. When the breaker is switched on and inserted into the cabinet of the power distribution cabinet, the breaker and the cabinet can be unlocked only after the operating button is pressed down and the operating button and the handle are pulled out. In the process of pulling out, the lug at the tail of the pressing rod of the operating button mechanism D drives the cabinet locking piece of the fixed unlocking device H to rotate, so that the locking boss on the cabinet locking piece is pressed down, and the limit of a product and the cabinet body is released. And continuously pulling out the operating button mechanism D to pull out the product from the power distribution cabinet. The product can be pulled out only in the state of opening, and does not need tools.

(6) The wiring is systematized and time-sharing wiring is carried out. The product and the external communication interface are made into a modularized assembly inside the product, and the pluggable communication interface is more beneficial to installation and maintenance. Meanwhile, the wiring and communication modules are accessed in a time-sharing mode when being accessed into the system, and the negative electrode is guaranteed to be contacted firstly, the communication is inferior, and the positive electrode is finally contacted, so that the reliable grounding of the control circuit is guaranteed, and the impact influence generated when a product is plugged into the system is prevented.

(7) The contact position of the mechanical switch is detected through a microswitch arranged on a corresponding PCB, the moving contact triggers the microswitch at the corresponding position to realize signal acquisition of mechanical breakpoint switching-on and switching-off, and the on-off state of the contact is indicated through an LED lamp, so that the maintenance and the fault removal are convenient.

The following describes the closing device, the tripping protection device, the emergency stop device, the opening locking device, the fixed unlocking device, the wiring system, the detection indication system, and the heat dissipation system of the circuit breaker, respectively, wherein some of the devices may relate to a plurality of mechanisms, modules, or components in fig. 4, and they cooperate with each other to perform corresponding functions.

As shown in fig. 5 a-7, the cover a01, the base and the top cover a03 of the circuit breaker housing can be of a snap-fit structure, which is easy to disassemble and assemble. Base A02 mainly provides the installation basis for relevant mechanism and spare part, wherein: mechanical parts of the circuit breaker are mainly installed above the front part of the base, and outgoing line parts are installed below the front part of the base; the middle part of the base is provided with electric control and heat dissipation parts; and parts in the wire inlet aspect are arranged at the rear part of the base. Base A02 sets up and sets up a plurality of locating plates (piece) etc. and hold the location spacing for relevant spare part, if: the handle and the handle spring are positioned and limited through a handle baffle A02d, the movable iron core and the lock catch are positioned through a tripping positioning plate A02c, and the emergency stop button and the emergency stop pressure spring are limited through an emergency stop block A02 a; and so on. A cabinet locking piece passing-through opening is formed between the base top wall positioning block A02b and the upper cover top wall positioning block A03a, a brake-separating unlocking piece passing-through opening is formed between the base top wall positioning block A02b and the surface cover top wall A01H, wherein the surface cover top wall A01H is provided with a rotating shaft seat A01G for installing a rotating shaft G02, and the rotating shaft G02 is shared by the brake-separating locking piece G01 and the cabinet locking piece H01. For convenient operation, a handle through hole A01a, an emergency stop button through hole A01b and an LED lamp through hole A01c are arranged on the front panel A01f of the mask. In order to facilitate wire outgoing, the mask bottom shell a01e is provided with a spring mounting cavity a01j and a spring fixing seat a01k to assemble a wiring spring P01 and a wiring spring P02, and meanwhile, the mask bottom shell a01e is further provided with a wiring board positioning column a01d to limit the wiring board B01 and the wiring board B02. Therefore, the related mechanism and parts of the circuit breaker can be compactly arranged on the shell, and the product has a compact structure and a small volume.

Incidentally, in describing the apparatus structure and the mounting structure, attention is paid to the mounting positions in fig. 5a to 7 at the same time.

2. Closing device

Aiming at the problems that the existing product closing device has many pure mechanical structural components and is not ideal enough in reliability, the embodiment of the invention optimizes the closing operation structure, the contact system structure and the layout mode, has compact structure and can realize reliable closing.

As shown in fig. 8-16, the mechanical switch contact system in the embodiment of the present invention includes a fixed contact J02, a movable contact J01, and a contact pressure spring J03, where the fixed contact J02 is fixedly installed on a circuit breaker housing base a02, the movable contact J01 is installed on a handle E01 of a closing operation mechanism in a linkage manner, the movable contact J01 is driven by the handle E01 to contact with a fixed contact J02, and the movable contact J01 is locked by a closing locking mechanism after being in place.

Referring to fig. 4, the handle E01 in this embodiment is used to drive the movable contact J01 to contact the stationary contact J02 and perform closing locking or opening disengagement through the closing locking mechanism. A handle body E01f in the middle of a handle E01 is arranged on a shell of the circuit breaker, penetrates through a handle through hole A01a in a face mask A01, and is provided with a handle compression spring E02, one end of the handle E01 abuts against a shaft hole E01g at the tail end of a handle E01, and the other end of the handle E01 abuts against a handle baffle A02d on a base A02.

The bottom of a handle body E01f is provided with a first seat block and a second seat block, a moving contact J01 and a contact pressure spring J03 are installed, a moving contact middle part J01a penetrates through a contact passing groove E01a on the first seat block at the bottom of the handle body E01f and is supported on a contact bearing platform E01b on the first seat block at the bottom of the handle body, a moving contact convex block J01b limited by the end surface of the contact passing groove is arranged on the moving contact J01, one end of a contact pressure spring J03 abuts against a contact pressure spring blocking part E01c on the second seat block at the bottom of the handle body E01f, and the other end of the contact pressure spring positioning column J01c is attached to a spring groove at the front end of the moving contact J01. Under the pressure of a contact pressure spring J03, a movable contact bump J01b on the movable contact J01 and a contact on the handle E01 are limited by the end face of the groove E01a, and the initial state is kept.

A handle buckle groove E01k is arranged on a first seat block at the bottom of a handle body E01f of a handle E01 to be connected with a closing lock catch I01 of a closing locking mechanism I, wherein the handle buckle groove E01k is positioned below a contact passing groove E01a, a contact bearing platform E01b is formed between the handle buckle groove E and the contact passing groove E01a, the middle part of a closing lock catch I01 is rotatably and synchronously assembled on a circuit breaker shell base A02 through a lock catch shaft I02, a movable iron core connecting part I01d is arranged at one end of the closing lock catch I01 to be connected with a movable iron core M01 of an electromagnetic tripping mechanism M, and a closing lock catch buckling part I01b is arranged at the other end of a moving contact of the closing lock catch I01 to enter and exit the handle buckle groove E01k to realize combination/separation, so.

In particular, the handle E01 is fitted with a interlockable operating button mechanism D. The operating button mechanism D comprises an operating button D01 and a button pressure spring D02, wherein a pressing cap of the operating button D01 and a pressing rod D01a are integrally connected. A pressing rod D01a of the operating button D01 penetrates through a handle shaft cavity E01h, a pressing cap is positioned outside the handle shaft cavity E01h, a pressing rod tail lug D01E corresponds to a head notch of the handle shaft cavity E01h, a pressing rod side lug D01b is positioned in a handle shaft cavity side groove, and a pressing rod side lug D01b is limited with the end face of the handle shaft cavity side groove. The button pressure spring D02 is arranged in the button pressure spring groove and is partially exposed, one end of the button pressure spring D02 props against a pressure spring blocking surface D01c on the operation button D01, the other end of the button pressure spring D02 props against a pressure spring blocking surface E01D on the handle E01 to keep a limiting state, and at the moment, the inner side surface D01D of a press cap of the operation button D01 is limited with the end surface E01E of a handle shaft cavity on the handle E01.

When the switch is closed, a finger pushes the operating button D01 to drive the handle E01, the moving contact J01 and the contact pressure spring J03 in the contact system J. The stroke of the handle E01 is greater than that of the movable contact J01, and the contact surface J01d on the movable contact J01 is firstly contacted with the contact surface J01a of the fixed contact J02, and then the stroke end point is reached. The movable iron core connecting part I01d on the first end of the closing lock catch I01 is linked with the movable iron core M01 in the electromagnetic tripping mechanism M, the movable iron core M01 enables the buckling part I01b on the second end of the closing lock catch I01 to enter the handle buckling groove E01k under the elastic action of the magnetic spring M03, and the buckling rod I01a of the buckling part pulls the end face E01j of the handle buckling groove, so that closing locking is achieved. When opening the brake, the reverse action is executed.

The operating button D01 is pushed continuously, the handle E01 continues to operate until the limit is limited by a handle baffle A02D on the base A02, at the moment, the closing lock I01 buckles the handle E01, the closing operating mechanism D and the contact system J are in a closing state, the handle pressure spring E02 is in a compression state, the contact pressure spring J03 continues to be compressed, and contact pressure is provided for the movable contact J01. At this time, the whole system is in a closing balance state under the action of the magnetic spring M03, the handle pressure spring E02 and the contact pressure spring J03.

In the circuit breaker, in order to better exert the performance of the switching-on device, the overall performance of the circuit breaker can be further optimized by combining with the emergency stop device, the tripping protection device, the switching-off locking device and other sub-systems, and the method is concretely described as follows.

3. Tripping protection device

Aiming at the problems that the circuit part of the existing product cannot be timely disconnected and has higher risk when a fault occurs, the embodiment of the invention signals to the electromagnetic tripping system when the fault is identified, so that the mechanical breakpoint is disconnected to break the circuit, thereby ensuring the reliable breaking of the electric system in the fault state and improving the reliability of the product.

As shown in fig. 17 and referring to fig. 4-16, the trip protection device according to the embodiment of the present invention includes an electromagnetic trip mechanism M configured on the mechanical switch, a movable iron core M01 of the electromagnetic trip mechanism is connected to a closing lock I01 of the mechanical switch closing locking mechanism, and an electromagnetic trip driving circuit drives an electromagnetic coil of the electromagnetic trip mechanism to be powered on/off according to an MCU control signal to actuate the movable iron core, so as to drive a closing lock I01 to trip a handle E01 of the mechanical switch closing operating mechanism. The closing lock I01 is rotatably installed on the shell of the circuit breaker, specifically, a lock shaft sleeve I01c in the middle of a closing I01 is installed on a lock shaft I02, wherein the lock shaft I02 is installed on a shell base A02, and thus the closing lock I01 is rotatably and synchronously assembled on the shell of the circuit breaker; the movable iron core connecting part I01d at one end of the closing lock catch is connected with the movable iron core M01 of the electromagnetic tripping mechanism M, so that the movable iron core M01 of the electromagnetic tripping mechanism can be linked to drive the buckling part I01b at the other end to be combined with or separated from the handle buckling groove E01k, wherein the head part of the buckling part I01b is provided with a buckling rod I01a which is wider than the buckling part I01b, the inner side surface of the buckling rod I01a is propped against the end surface E01jk of the handle buckling groove when closing, and the buckling rod I01a is separated from the end surface E01jk of the handle buckling groove when opening. In particular, the circuit breaker of the present embodiment is configured with a hardware protection circuit coupled to the MCU and the electromagnetic trip driving circuit so that the trip is controlled by the MCU.

When a line has a fault (such as overload or short circuit), the MCU in the electronic module K recognizes the fault, when an electronic solid-state switching device in the electronic module K cannot bear and needs to be disconnected at a mechanical breakpoint, the MCU in the electronic module K sends a signal to drive the electromagnetic trip mechanism M, so that the movable iron core M01 in the electromagnetic trip system overcomes the magnetic spring M03 to move upward under electromagnetic force, the coupling portion M01a of the movable iron core M01 is linked with the closing latch I01, so that the closing latch I01 rotates, the buckling portion I01b on the closing latch I01 is separated from the handle buckle groove E01K, the inner side surface of the buckle rod I01a is separated from the handle buckle groove end surface E01J, and the handle E01 drives the movable contact J01 and the fixed contact J02 to be separated under the release of the handle pressure spring E02, so that the mechanical breakpoint is disconnected, thereby disconnecting the circuit.

In addition, the embodiment of the invention further realizes auxiliary tripping protection through an emergency stop device, wherein the specific structure and the working principle of the emergency stop device further refer to the following description.

4. Emergency stop device

Aiming at the problems that the existing circuit breaker cannot be stopped suddenly when in failure and has high product risk, the embodiment of the invention is provided with the emergency operation button and the corresponding microswitch, so that the breaking of an electronic solid-state switch device after a mechanical breakpoint is realized, the emergency state is convenient to process, and personnel and system safety are protected when in failure.

As shown in fig. 14-18, the circuit breaker emergency stop apparatus according to the embodiment of the present invention includes an emergency stop button F01 and an emergency stop microswitch Q02, where the emergency stop button F01 is used to trigger the emergency stop microswitch Q02 to send a signal to first disconnect the electronic solid state switch device in an inspection or emergency state, and then disconnect the mechanical switch by driving the closing lock I01 of the mechanical switch to be separated from the circuit breaker closing operation mechanism handle E01, that is, the emergency stop button F01 is configured to implement the mechanical break point first closing and then opening.

Referring to fig. 4-13, the emergency stop device has a specific structure and a working process as follows, the head part F01a of the emergency stop button passes through the emergency stop button through hole a01b on the circuit breaker casing a01 and is limited by the head step F01F of the emergency stop button, the tail part of the emergency stop button is provided with a micro switch trigger part and a closing latch trigger part in the pressing direction of the emergency stop button, the former is a micro switch trigger bump F01c at the tail end of the emergency stop button, the latter is an arc closing latch trigger recess F01b close to the tail end of the emergency stop button, and the two are respectively located at the opposite sides of the emergency stop button F01. Thus, the emergency stop button F01 can trigger the solid-state switch to turn off, and then drive the buckling part of the closing lock I01 to separate from the handle buckling groove of the handle E01 to unlock. Accordingly, the scram microswitch is mounted on a PCB secured to the circuit breaker housing base a02 and signals when the scram button F01 is activated. In particular, to facilitate monitoring of the circuit breaker, the emergency stop button F01 is configured with a displacement sensor to detect conditions in real time.

Preferably, the emergency stop button F01 is configured with an emergency stop pressure spring F02, two ends of the emergency stop pressure spring F02 respectively abut against the emergency stop button F01 and a circuit breaker housing base a02 to reset the emergency stop button, specifically, an emergency stop pressure spring moving groove F01d is arranged in the middle of the emergency stop button F01, the emergency stop pressure spring F02 is installed in the emergency stop pressure spring moving groove F01e, two ends F02 of the emergency stop pressure spring are respectively attached to an emergency stop pressure spring positioning column F01g on the emergency stop button and an emergency stop block a02a on the housing base a02, and in the pressing process, the emergency stop pressure spring moving groove F01d slides back and forth on the emergency stop block a02a, and the emergency stop pressure spring F02 is compressed and released under the action of the emergency stop block a02 a.

During maintenance and emergency, an emergency stop button F01 is manually pressed, an emergency stop button head F01a is assembled in a mask A01 emergency stop button through hole A01b to move, in an initial state, the emergency stop pressure spring F02 protrudes out of the surface of a mask A01 under the action of elasticity, an emergency stop pressure spring F02 is assembled in an emergency stop pressure spring movement groove F01e of an emergency stop button F01, the tail of the emergency stop pressure spring is limited with an emergency stop block A02a on a base A02, when an emergency stop button F01 is pressed, a micro switch trigger bump F01c on the emergency stop button F01 firstly pushes a micro switch Q02, wherein the emergency stop micro switch Q02 is fixed on a single PCB, and the PCB is fixed on the base A02. The scram microswitch Q02 sends out a signal to turn off the electronic solid state switch device first and then turn off the electronic solid state switch device first. Then, a switch-on lock trigger concave part F01b on the emergency stop device F01 presses down a buckling part I01b on a switch-on lock I01, so that the buckling part I01b on the switch-on lock I01 is separated from a handle buckling groove E01k of a handle E01, an operation button E01 drives a moving contact J01 and a static contact J02 to be separated under the release of a button pressure spring E02, a limit end face E01n of a second seat block of the handle E01 stops moving after touching a front plate A01F of a mask A01, the switch-off state is kept, the mechanical break point is disconnected, and the circuit is disconnected. After the sudden stop device F01 is loosened, the sudden stop device F01 is reset under the action of the sudden stop pressure spring F02, and the head step F01F on the sudden stop device F01 is limited with the front plate A01F of the face mask A01, so that the head step F01 is returned to the initial position.

5. Separating brake locking device

Aiming at the problem that the existing breaker can be switched on when not being installed in a cabinet, and is easy to cause false switching-on and unsafe, when the breaker is not installed in the machine frame, the locking device limits the switching-on device and cannot be switched on. After the device is installed in the machine frame, the locking device limits and unlocks the switching device, and then the device can be reliably switched on. Therefore, the false switching-on can be prevented, and the safety is improved.

As shown in fig. 19 to 22, the opening locking device of the circuit breaker according to the embodiment of the present invention includes an opening locking piece G01 rotatably installed on the housing of the circuit breaker, and the opening locking piece G01 is lifted when the circuit breaker is not installed in the cabinet or in place, so as to prevent the handle E01 of the closing operation mechanism of the mechanical switch from moving in the closing direction to achieve opening locking.

The opening locking piece G01 is a triangle block, a rotating shaft G02 is arranged in the shaft hole of the opening locking piece shaft sleeve G01e at the first end, wherein the rotating shaft G02 is fixed in the rotating shaft seat A01G of the face mask A01.

Referring to fig. 3-18, the second end of the opening lock is provided with an opening lock locking part for limiting the position of the handle, specifically, the second end of the opening lock G01 is provided with a locking protrusion G01d, the locking protrusion G01d at the end of the opening lock cooperates with the locking protrusion E01m at the tail end of the handle E01 for limiting, wherein the opening lock locking protrusion G01d and the handle locking protrusion E01m are respectively configured with arc surfaces, that is, they form a cam structure. The opening locking piece G01 is provided with a reset piece, two ends of the reset piece respectively act on the breaker shell and the opening locking piece G01, so that the opening locking piece G01 is in a lifting state when not being installed in the power distribution cabinet, wherein the reset piece is specifically a torsion spring G03 which is sleeved on a rotating shaft G02 of the opening locking piece, one pin is abutted against the breaker shell, and the other pin is inserted into a spring bearing hole G01c of the opening locking piece G01. Thus, the torsion spring G03 makes the opening lock G01 in a lifted state when opening. Here, a handle pressure spring E02 is disposed at the tail of the handle E01, and the handle is reset when the brake is released.

When a product is not installed in the power distribution cabinet, the product is in an opening state in an initial state, the operating button D01 and the handle E01 are in a protruding state at the moment, the opening locking piece G01 is in a lifting state under the action of the spring force of the torsion spring G03, and the side face of the upper middle limiting boss G01b of the opening locking piece G01 is limited with the side face of the opening locking piece through hole of the mask A01. The locking lug E01m on the handle E01 is limited by the locking lug G01d on the opening locking piece G01, so that the handle E01 cannot move towards the closing direction. Only after the switch cabinet is installed, the opening locking piece G01 is always in a pressed state under the action of the switch cabinet, at the moment, the top surface G01a of the opening locking piece is limited with the inner wall of the mask A01, and the locking lug E01m on the handle E01 and the locking lug G01d on the opening locking piece G01 are in a yielding state, so that the handle E01 can be freely switched on.

Meanwhile, if the initial state of the circuit breaker is not in a brake-off state during assembly, namely when the circuit breaker is in a brake-on state, the brake-off locking piece G01 is in a lifting state under the action of a torsion spring G02, the handle E01 is pulled at the moment, the brake-off locking piece G01 is pressed down by an unlocking convex column E01d on the handle E01 in the pulling process, so that a product is braked, and the brake-off locking piece G01 is lifted up again under the action of the torsion spring G02 after brake-off, so that the brake-off locking state is maintained.

6. Fixed unlocking device

For the existing product which needs a tool when being normally pulled out and has the risk of being pulled out by mistake in the power-on state, the embodiment of the invention separates from the clamping groove of the power distribution cabinet by controlling the rotation of the fixed unlocking device, and simply pulls out the operating button to separate the whole product from the power distribution cabinet, so that the operation is simple and convenient, and the safety is high.

As shown in fig. 23 to 26, the circuit breaker fixing unlocking apparatus according to the embodiment of the present invention includes a cabinet locking member H01 and a cabinet unlocking member. The cabinet locking piece H01 is rotatably arranged on the shell of the circuit breaker, and the cabinet locking piece H01 is in a lifting state when the circuit breaker is arranged in the cabinet of the power distribution cabinet, so that the cabinet locking piece locking boss H01d is exposed out of the shell of the circuit breaker and is matched with a clamping groove of the cabinet of the power distribution cabinet for limiting. The cabinet unlocking piece is inserted into the shell cover A02, and an unlocking part for driving the cabinet locking piece H01 to swing downwards is arranged on the cabinet unlocking piece and used for driving the cabinet locking piece H01 to swing downwards to enable the cabinet locking piece locking boss to be separated from the cabinet clamping groove of the power distribution cabinet; after the cabinet unlocking piece is pulled out, the cabinet unlocking piece drives the cabinet locking piece H01 to swing downwards, so that the first protrusion H01d on the cabinet locking piece H01 moves downwards to enter a cavity between the shell bottom cover A02 and the upper cover A03, and the circuit breaker and the cabinet are unlocked.

In this embodiment, the cabinet locking member H01 is a triangular block, one end of which is provided with a first protrusion H01e, the first protrusion H01e is provided with a shaft sleeve to penetrate through a rotating shaft G02, wherein two ends of the rotating shaft G02 are connected to the inner side wall of the breaker housing, so that the cabinet locking member H01 swings around the rotating shaft G02 as the center. One end of the cabinet locking piece H01 is provided with an upward second protrusion H01d, the second protrusion H01d serves as a locking boss of the cabinet locking piece and penetrates through a cabinet locking piece passing opening between the outer shell bottom cover A02 and the upper cover A03, one side face of the second protrusion H01d is an arc face, when the circuit breaker is installed in the cabinet, the cabinet touches the arc face, the cabinet locking piece H01 swings downwards in a small amplitude, and after the circuit breaker is installed in the cabinet in place, the cabinet locking piece H01 automatically swings upwards under the action force of the torsion spring G03, so that the circuit breaker can be conveniently and smoothly installed in the cabinet of the power distribution cabinet and can be locked. The middle part lower extreme of rack locking piece H01 is equipped with the connecting block, is equipped with the protruding H01b of third in the connecting block portion, and the outside force that rack unlocking piece was born as rack locking piece H01's unblock portion to the protruding H01b of third, from this the lower hem for rack locking piece locking boss breaks away from the switch board draw-in groove.

Referring to fig. 4-22, the unlocking member of the cabinet in this embodiment includes a handle E01 and an operating button D01, which are linked together, wherein a handle shaft cavity is formed in the handle E01, and the operating button D01 includes a circular pressing cover and a pressing rod connected to the bottom of the pressing cover, and the pressing rod is inserted into the handle shaft cavity E01 h. The two sides of the handle shaft cavity are provided with handle shaft cavity side grooves, the two sides of the pressing rod are provided with pressing rod side protrusions D01b, the pressing rod side protrusions are located in the handle shaft cavity side grooves and are in sliding connection with the handle shaft cavity side grooves, and the assembling relationship is further referred to the above content. Thus, the operation button D01 can be interlocked with the handle E01. The unlocking can be realized by matching the pressing rod tail bump D01E with a third bump H01b on the cabinet locking piece H01, when an operating button D01 and a handle E01 are dragged outwards, the third bump H01b drives the cabinet locking piece H01 to swing downwards, and the second bump, namely the locking boss, on the cabinet locking piece H01 is separated from a cabinet clamping groove of the power distribution cabinet to unlock.

In this embodiment, the cabinet locking piece H01 is configured with a reset piece, and two ends of the reset piece act on the breaker housing and the cabinet locking piece H01 respectively, so that the cabinet locking piece is in a lifted state when being installed in the power distribution cabinet and in place, wherein the reset piece is specifically a torsion spring G03, which is sleeved on a rotating shaft G02 of the cabinet locking piece, one leg of the reset piece abuts against the breaker housing, and the other leg of the reset piece is inserted into a spring bearing hole H01c of the cabinet locking piece H01. Thus, the torsion spring enables the cabinet locking piece to be in a lifting state when the brake is opened.

Incidentally, in order to simplify the structure, the rotating shaft G02 and the torsion spring G03 are shared by the cabinet locking piece H01 and the opening locking piece G01, so that the circuit breaker product is more compact; although they may be provided separately.

When a product is switched on, under the spring force of the torsion spring G03, the cabinet locking piece H01 is in a lifting state, and the upper side H01a of the cabinet locking piece H01 is limited with the top wall A03a of the upper cover A03. As shown in fig. 24, the second protrusion H01d on the cabinet locking piece H01 is limited with the slot of the power distribution cabinet, and the whole product cannot be pulled out. At this time, when the emergency stop button is pressed, the handle E01 has a certain displacement in the opening process, and does not touch the cabinet locking piece H01, as shown in figure 25, the opening can be reliably carried out. Only in the opening state shown in fig. 25, at this time, the operating button tail projection D01E on the operating button D01 is close to the third projection H01b on the fixed cabinet locking piece H01, when the handle E01 is manually pulled out, and the operating button D01 is synchronously pulled out, the fixed cabinet unlocking piece H01b drives the operating button tail projection D01E on the operating button D01 to rotate the cabinet locking piece H01, so that the cabinet stop H01D is separated from the cabinet slot, and then the pressing rod side projection D01b on the operating button D01 is limited by the feature E01D on the handle E01, the operating button stops being pulled out, and the whole product can be separated from the power distribution cabinet by continuously pulling out the operating button D01. After the drawer is pulled out, the operating button D01 is kept in close contact with the handle E01 under the action of the button pressure spring D02, and the cabinet locking piece H01 is restored to a raised and protruded state under the action of the torsion spring G03.

7. Wiring system

The wiring system comprises a wire inlet end system and a wire outlet end system, wherein the wire inlet end system is provided with a positive wire inlet module, a negative wire inlet module and a communication module, and the wire outlet end system comprises two sets of wiring boards and wiring elastic pieces.

As shown in fig. 27, the communication module of the embodiment of the present invention comprises a module base L01 and clips L02 and L03, wherein the clips L02 and L02 are flexible clips that fit into corresponding recesses L01a of the module base L01, and the modular structure facilitates wiring and installation while increasing the number of clips to 4 according to the system communication requirements.

As shown in fig. 28, the specific connection manner in the embodiment of the present invention is as follows. The jointing clamp clamping portion of the negative wire inlet module C01, the jointing clamp clamping portion of the communication module L01 and the jointing clamp clamping portion of the positive wire inlet module C02 are sequentially arranged in the inserting direction instead of being located at the same position, namely, the distance from the clamping portions of the jointing clamps to the wire inlet port is arranged from small to large, and therefore the power and communication wire inlet time-sharing access is facilitated. When the whole breaker product is transversely inserted into the cabinet, the busbar firstly contacts the jointing clamp clamping part of the negative wire inlet module C01, the jointing clamp clamping part of the communication module L01 is the second time, and the jointing clamp clamping part of the positive wire inlet module C02 is the last. The electrode incoming line and the communication wiring adopt time-sharing access when accessing the system, and the negative electrode is ensured to be contacted firstly, the communication is contacted secondly, and the positive electrode is contacted finally through the difference of clamping characteristic positions on each wiring clamp, so that the control circuit is ensured to be grounded firstly reliably, and the impact influence generated when the control circuit is plugged in and unplugged from the system is prevented.

As shown in fig. 29-30, the outlet system of the embodiment of the present invention adopts a fast wiring manner, the curled portion P01c of the wiring spring P01 is installed in the spring mounting cavity a01j of the face shield a01, the curled portion P01c of the wiring spring P01 is wound on the spring fixing seat a01k in the spring mounting cavity a01j, the spacing portion P01a of the wiring spring is matched with the spacing portion of the spring mounting cavity a01j on the face shield a01 for spacing, a manual tool or a direct wire is inserted from the corresponding wiring hole of the face shield a01 to contact with the wiring board B01, the wire is kept connected with the wiring board B01 under the deformation of the spring pressing portion P01B, during this process, the corresponding spacing of the spacing portions P01a and a01j of the spring P01 can effectively prevent the rotation of the spring, the deformation of the spring is ensured, the deformation of the wiring is more reliable, the whole outlet system is integrated in the face shield a01, and the corresponding spacing features in the face shield are fixed and isolated, is simple and convenient.

8. Detection indicating system

As shown in fig. 31, when the movable contact J01 acts during switching on and off, the movable contact projection J01b on the movable contact J01 triggers the microswitch S01 at the corresponding position, so as to give a signal to the system to indicate the on-off state of the mechanical switch. The micro-switches required for position detection and the LED lamps indicating the on-off state of the solid state switching devices are fixed on corresponding Printed Circuit Board (PCB) N01, and the PCB is particularly assembled between the shell mask and the base A02.

Therefore, when the contact position detects that the system breaks down and needs to be disconnected due to mechanical breakpoints, a tripping signal is sent out, so that the result can be effectively responded to the system, a logic closed loop is formed, and the safety of the system and personnel is guaranteed to be protected to the maximum. Meanwhile, the state indication of the LED lamp provided with the solid-state switch can ensure that a maintenance worker can find a fault line quickly, and the maintenance worker can conveniently maintain the fault line.

9. Heat dissipation system

In the embodiment of the invention, the radiator R01 is extruded by aluminum material and formed at one time, and is assembled with the shell in a buckling mode, so that the requirements of screwing and fixing and secondary processing of the section in the traditional radiator design are avoided.

As shown in fig. 32-33, the heat sink R01 of the present invention is inserted into the heat sink slot a02e and the heat sink slot a02h of the base a02 through the slots R01b and R01c from above the housing. After the insertion is completed, the plate body K01a of the circuit board K01 in the electronic module is clamped by the clamping block a02g and the clamping block a02f on the base a02 to block the heat sink R01, so that the heat sink R is prevented from moving back and forth. After the upper cover A03 is closed, the upper cover radiating cover plate A03b covers the radiator side wall R01a to prevent the radiator from moving up and down. Thereby firmly fixing the heat sink.

Therefore, the radiator related to the invention has the advantages of simple structure and simplified assembly process, and is more beneficial to industrial production and manufacturing.

The above preferred embodiments of the circuit breaker of the present invention are mainly applicable to low voltage dc distribution service environments, which are improved with respect to various drawbacks of the prior art, and have the following advantages over conventional plug-in circuit breaker products.

1. The existing miniature circuit breaker overload protection generally adopts a thermal bimetallic protection mechanism, the instantaneous short-circuit protection generally adopts an electromagnetic instantaneous mechanism to carry out short-circuit protection, the response time is millisecond grade, the generation of electric arc can be accompanied, and the response time is longer and is not beneficial to breaking. By means of the combination of the electronic solid-state switching device and the mechanical structure, the invention eliminates the thermal bimetallic strip, the electromagnetic snap mechanism and the arc extinguishing mechanism, realizes arc-free breaking, improves the response speed and the breaking capacity and prolongs the service life.

2. The existing miniature circuit breaker only has a single mechanical breakpoint, and the condition that the load equipment has failure risk and cannot be protected can be caused when the failure mechanical breakpoint can not be disconnected. The above preferred embodiments of the present invention protect load devices from single point failures by combining solid state switches and mechanical breakpoints for dual protection.

3. When the existing miniature circuit breaker is used under the condition with polarity requirements, the problem of reverse connection sometimes occurs in the actual construction process except that the positive and negative poles are clearly identified, so that the equipment has a fault risk. The above preferred embodiment of the present invention solves the problem of reverse connection of the positive and negative electrodes by identifying the voltage direction by the electronic device to trigger the trip mechanism to break the mechanical break point.

4. The existing miniature circuit breaker needs manual reset every time after the fault tripping, has no selective protection, and can not perform non-manual reset by setting the fault type. In the above preferred embodiment of the present invention, the solid-state switch is used to break the logic in advance in preference to the mechanical break point, and after the fault is removed, the solid-state device is only required to be closed, so that the power supply can be restored through remote communication without manual reset.

5. The branch circuits of the power distribution cabinet need to be opened, closed and disconnected in a unified mode through the relays, and the branch circuits cannot be controlled in a shunt mode. The invention can independently control each load by means of the solid-state switch device and the communicable interface.

6. The existing miniature circuit breaker has no operation measure for clear identification when meeting emergency, and lacks an independent operation mechanism for emergency stop, so that the risks of personnel and equipment are increased. According to the preferred embodiment of the invention, the emergency stop button and the tripping mechanism are designed to be linked, so that the mechanical break point is quickly disconnected in an emergency, and further damage of the fault to the power utilization system is reduced.

7. The existing miniature circuit breaker can be switched on when not being installed in a cabinet, and error switching-on is easily caused. The safety of the installation and use of the circuit breaker cannot be guaranteed. The above preferred embodiment of the present invention can realize that there is no insertion type non-closing in the switch by the mechanical opening locking device, thereby avoiding the misoperation.

8. After the existing miniature circuit breaker is installed in place, the risk of being pulled out by mistake exists under the power-on state, so that the circuit breaker is not favorable for working reliably and stably, and potential safety hazards also exist. The above preferred embodiment of the present invention can achieve the purpose that the lock cannot be pulled out in the non-brake state by mechanically fixing the unlocking device, thereby reducing the risk of pulling out by mistake in the power-on state.

9. The existing miniature circuit breaker generally adopts the elastic sheet to lock a product in a cabinet, and the operation is inconvenient by means of an additional tool when the product is unlocked and taken out from the cabinet. The above preferred embodiment of the present invention can realize locking and pulling out of the product after opening without additional tools through the mechanical unlocking mechanism.

10. The interface between the existing miniature circuit breaker and the outside cannot communicate with each other but is not directly connected with an external line for communication. The above preferred embodiment of the invention is made into a modularized assembly inside the product through the external communication interface, and the plug-in type is more beneficial to installation and maintenance.

11. The existing miniature circuit breaker adopts synchronous contact when wiring. The above preferred embodiment of the invention adopts time-sharing access when the system is accessed through the wiring and communication module, and ensures that the negative electrode is contacted first, the communication is second and the positive electrode is contacted last through the difference of the clamping characteristic positions on the wiring clamp, thereby ensuring that the control circuit is reliably grounded first and preventing impact influence generated when the control circuit is plugged in and unplugged from the system.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.

Claims

1. The intelligent circuit breaker emergency stop device is characterized in that the circuit breaker comprises a mechanical switch and an electronic solid-state switch device which are connected in series and can be controlled by an MCU (micro control unit), the circuit breaker emergency stop device comprises an emergency stop button and an emergency stop microswitch, the emergency stop button is used for triggering the emergency stop microswitch to send a signal to disconnect the electronic solid-state switch device in advance when in maintenance or emergency, and then the mechanical switch is disconnected by driving a closing lock catch of the mechanical switch to be separated from a handle of a closing operation mechanism of the circuit breaker.

2. The intelligent circuit breaker emergency stop apparatus of claim 1, wherein the emergency stop button is configured with a displacement sensor to detect the status in real time.

3. The intelligent circuit breaker emergency stop device of claim 1, wherein the emergency stop button tail portion is capable of activating the emergency stop microswitch during the emergency stop button stroke and driving the engaging portion of the closing latch to disengage from the handle slot for unlocking.

4. The intelligent circuit breaker emergency stop device according to claim 3, wherein the emergency stop button is provided with a micro switch trigger and a closing latch trigger, and the emergency stop micro switch trigger is located in front of the closing latch trigger in a pressing direction of the emergency stop button.

5. The intelligent circuit breaker emergency stop device of claim 4, wherein the micro switch trigger is a micro switch trigger protrusion located at the rear end of the emergency stop button, and the closing latch trigger is an arc-shaped closing latch trigger recess located near the rear end of the emergency stop button.

6. The intelligent circuit breaker emergency stop device according to claim 5, wherein the micro switch triggering protrusion and the closing latch triggering recess are respectively located at opposite sides of the emergency stop button.

7. The intelligent circuit breaker emergency stop device of claim 1, wherein the emergency stop button is configured with an emergency stop compression spring, and two ends of the emergency stop compression spring respectively abut against the emergency stop button and the circuit breaker housing base to reset the emergency stop button.

8. The intelligent circuit breaker emergency stop device of claim 7, wherein the emergency stop button is provided with an emergency stop pressure spring moving groove in the middle, the emergency stop pressure spring is mounted in the emergency stop pressure spring moving groove, and two ends of the emergency stop pressure spring are respectively attached to an emergency stop pressure spring positioning column on the emergency stop button and an emergency stop block on the housing base.

9. The intelligent circuit breaker emergency stop device of claim 1, wherein the emergency stop button head passes through the circuit breaker housing mask through hole and is retained by the emergency stop button head step.

10. The intelligent circuit breaker emergency stop apparatus of any one of claims 1-9, wherein the emergency stop microswitch is mounted to a PCB affixed to the base of the circuit breaker housing.