A molded case circuit breaker

Abstract

The present invention relates to the technical field of circuit breakers, and discloses a molded case circuit breaker, comprising a housing, wherein a contact plate and a contact pole shaft are arranged inside the housing; elastic force breaking mechanisms are arranged on both sides of the contact pole shaft, and the elastic force breaking mechanisms include a positioning rod, a movable block is movably sleeved on the positioning rod, and a third spring is also movably sleeved on the positioning rod; an electromagnetic assist mechanism is also arranged on both sides of the contact pole shaft, and the electromagnetic assist mechanism includes a second electromagnet, and a second capacitor is installed on the second electromagnet, a transmission assembly is arranged on one side of the second electromagnet, and a clamping block is rotatably installed at the bottom of the contact pole shaft. The present invention sets an elastic force breaking mechanism, utilizes the elastic force of the third spring to achieve the disconnection of the circuit breaker, and utilizes the second electromagnet as an assisting force, which responds quickly without over-reliance on the electromagnet, has the advantages of mechanical structure stability, and does not require the electromagnet to be energized for a long time.

Description

Technical Field

[0001] The invention belongs to the technical field of circuit breakers, and in particular relates to a molded case circuit breaker. Background Art

[0002] Molded case circuit breakers are also called device-type circuit breakers. All parts are sealed in a plastic shell. Auxiliary contacts, undervoltage releases, and shunt releases are mostly modular. Due to the very compact structure, molded case circuit breakers are basically impossible to repair. They are mostly manually operated, and large capacity can be selected for electric opening and closing.

[0003] The Chinese patent with the authorization announcement number CN211045358U discloses an electromagnetic tripping device for a circuit breaker. The two adjustment parts of the knob act on the adjustment rod synchronously and jointly, so that the adjustment rod is evenly stressed and can move up and down in a horizontal and balanced manner, thereby avoiding the problem of inconsistent lengths of air gaps in the three-phase core and inconsistent three-phase tripping currents caused by the tilting of the adjustment rod to press down the linkage mechanism, effectively avoiding the problem of malfunction or non-action of a phase caused by this, with a simple structure, ensuring the consistency of the tripping currents of each phase, and improving the reliability of the circuit breaker.

[0004] However, this technical solution still has at least the following defects: the solution mainly relies on the electromagnetic system to perform the circuit breaker disconnection operation, and the electromagnet has the characteristic of high energy consumption. If the operation is completely performed by the electromagnet, the energy consumption is relatively large, and the electromagnet is stored in the circuit breaker for a long time, and is prone to corrosion in a humid environment, resulting in the degradation of the electromagnet performance, and the magnetic force generated is insufficient to disconnect the circuit breaker, and it is impossible to effectively respond to circuit failures. In view of this, the present invention is specially proposed. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a molded case circuit breaker, which is provided with an elastic breaking mechanism, utilizes the elastic force of a third spring to achieve the breaking of the circuit breaker, and utilizes the second electromagnet as an assisting force. It responds quickly without over-reliance on the electromagnet. It has the advantages of mechanical structure stability and does not require the electromagnet to be powered on for a long time, thereby greatly saving energy consumption. By using a capacitor as a power supply module for the electromagnet, it is possible to release a large amount of charge in a short time to meet the power supply demand of the electromagnet, while ensuring that the escape of charge during the storage period is minimized, thereby further saving energy consumption.

[0006] The technical solution adopted by the present invention to solve the technical problem is:

[0007] A molded case circuit breaker comprises a housing, wherein a contact plate and a contact pole shaft are arranged inside the housing, and the connection state of the circuit breaker circuit is changed by controlling the connection state of the contact plate and the contact pole shaft;

[0008] Elastic disconnecting mechanisms are arranged on both sides of the contact pole shaft, and the elastic disconnecting mechanisms include a positioning rod, a movable block is movably sleeved on the positioning rod, and a third spring is also movably sleeved on the positioning rod. The disconnecting mechanism controls the contact pole shaft to be disconnected from the contact plate through the elastic force of the third spring;

[0009] Electromagnetic assist mechanisms are also provided on both sides of the contact pole shaft, and the electromagnetic assist mechanisms include a second electromagnet, and a second capacitor is installed on the second electromagnet. A transmission assembly is provided on one side of the second electromagnet. A clamping block is rotatably installed at the bottom of the contact pole shaft, and an adaptation groove is provided on the clamping block. The second electromagnet drives the clamping block to rotate through the transmission assembly.

[0010] As a preferred embodiment of the present invention, the elastic breaking mechanism also includes a support frame, the movable block is slidably connected on both sides of the support frame, a plug plate is movably inserted on the movable block, a card plate is fixedly installed on one side of the plug plate, a card slot is opened on one side of the support frame, the card slot is adapted to the card plate, a second permanent magnet is fixedly installed on one side of the card plate, a mounting frame is fixedly installed on one side of the support frame, a first permanent magnet is fixedly installed on the bottom of the mounting frame, and the first permanent magnet and the second permanent magnet are repelled by the same polarity on the side close to each other.

[0011] As a preferred embodiment of the present invention, the transmission assembly also includes a first gear and a second gear, the first gear and the second gear are both fixedly connected to the block, and the two adjacent first gears are meshed with each other, the bottom of the second gear is meshedly connected with a rack, a slide rail is slidably installed at the bottom of the rack, the second electromagnet is fixedly installed at both ends of the slide rail, a first support plate is fixedly installed at one end of the rack, and the first support plate is made of magnetic material, a second spring is fixedly installed at one end of the first support plate, a second support plate is fixedly installed at one end of the second spring, and the second support plate is fixedly installed on the slide rail.

[0012] As a preferred embodiment of the present invention, the electromagnetic assist mechanism also includes a clamping assembly, the clamping assembly includes a connecting plate and a lever, the connecting plate is made of magnetic material, a guide block is fixedly installed on the bottom of the connecting plate, one end of the lever is fixedly connected to the clamping block, the lever is adapted to the guide block, the connecting plate is rotatably connected to the contact pole shaft, and a torsion spring is installed at the connection between the connecting plate and the contact pole shaft, a magnetic control assembly is arranged on one side of the clamping assembly, the magnetic control assembly includes a first electromagnet, the first electromagnet is fixedly installed on the slide rail, and a first capacitor is installed on the first electromagnet.

[0013] As a preferred embodiment of the present invention, a support plate is also installed in the shell, a clamping assembly is arranged at the bottom of the support plate, the clamping assembly includes a fixed block, the fixed block is fixedly installed at the bottom of the support plate, a telescopic rod is fixedly installed at one end of the fixed block, one end of the telescopic rod is fixedly connected to the contact plate, a first spring is movably sleeved on the telescopic rod, and the clamping assembly keeps the contact plate and the contact pole shaft in a clamped state through the first spring.

[0014] As a preferred embodiment of the present invention, a base plate is also installed in the shell, a sliding assembly is arranged on the base plate, the sliding assembly includes a slider, a sliding groove is opened on the contact pole shaft, the contact pole shaft is movably connected to the base plate through the slider and the sliding groove, an insulating part is fixedly installed on the bottom of the contact pole shaft, one end of the insulating part is rotatably connected to a handle, and one end of the handle is rotatably connected to the inner wall of the shell.

[0015] A breaking system comprises a charge storage unit and a charge release unit;

[0016] The charge storage unit is used to control the first capacitor and the second capacitor to store charges;

[0017] The charge release unit is used to control the first capacitor and the second capacitor to release the charge and act on the first electromagnet and the second electromagnet respectively.

[0018] As a preferred embodiment of the present invention, the charge storage unit includes a first storage strategy and a second storage strategy, wherein the first storage strategy is used to control the charge storage of the first capacitor, and the second storage strategy is used to control the charge storage of the second capacitor;

[0019] The first storage strategy includes an automatic switch S1 configured, the automatic switch S1 is used to control the connection and disconnection of the first capacitor with the power supply, the first storage strategy includes obtaining the rated voltage and the real-time voltage of the first capacitor, when the rated voltage of the first capacitor is greater than the real-time voltage, it indicates that the first capacitor is not fully charged, and a first charging instruction is generated, based on the first charging instruction, the automatic switch S1 is controlled to connect the first capacitor with the power supply, when the rated voltage of the first capacitor is equal to the real-time voltage, it indicates that the first capacitor is fully charged, and a first power-off instruction is generated, and the automatic switch S1 is controlled to disconnect from the first capacitor based on the power-off instruction;

[0020] The second storage strategy includes being configured with an automatic switch S2, and the automatic switch S2 is used to control the connection and disconnection of the second capacitor with the power supply. The second storage strategy includes obtaining the rated voltage and real-time voltage of the second capacitor. When the rated voltage of the second capacitor is greater than the real-time voltage, it indicates that the second capacitor is not fully charged, and a second charging instruction is generated. Based on the second charging instruction, the automatic switch S2 is controlled to connect the second capacitor with the power supply. When the rated voltage of the second capacitor is equal to the real-time voltage, it indicates that the second capacitor is fully charged, and a second power-off instruction is generated. Based on the power-off instruction, the automatic switch S2 is controlled to disconnect from the second capacitor.

[0021] As a preferred embodiment of the present invention, the charge release unit includes a first release strategy and a second release strategy, wherein the first release strategy is used to control the first capacitor to release the charge and act on the first electromagnet, and the second release strategy is used to control the second capacitor to release the charge and act on the second electromagnet;

[0022] The first release strategy includes configuring a startup logic in the automatic switch S1, and the startup logic includes obtaining the current of the molded case circuit breaker at the contact pole axis. When the current is in an increasing state, it indicates that the molded case circuit breaker is in the power-on process. When the current maintains a stable state, it indicates that the molded case circuit breaker is fully connected, and a first magnetic attraction instruction is generated. Based on the first magnetic attraction instruction, the automatic switch S1 is controlled to connect the first capacitor with the first electromagnet.

[0023] As a preferred embodiment of the present invention, the second release strategy includes obtaining the standard voltage of the power supply, and configuring an execution logic in the automatic switch S2, the execution logic includes obtaining the real-time voltage state of the power supply, when the real-time voltage of the power supply is higher than the standard voltage, it indicates that the voltage of the molded case circuit breaker is higher than the rated value, and generates a second magnetic attraction instruction, and controls the automatic switch S2 based on the second magnetic attraction instruction to connect the second capacitor to the second electromagnet.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention sets an elastic breaking mechanism, uses the elastic force of the third spring to achieve breaking of the circuit breaker, and uses the second electromagnet as a booster, which responds quickly without over-reliance on the electromagnet, and reduces the lower limit of the magnetic force provided by the electromagnet. It has the advantages of mechanical structure stability, and the electromagnet does not need to be powered on for a long time, which greatly saves energy consumption.

[0026] The present invention uses a capacitor as a power supply module for the electromagnet, thereby being able to release a large amount of charge in a short period of time to meet the power supply demand of the electromagnet, while ensuring that the escape of charge during the charge storage period is minimized, thereby further saving energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the cross-sectional structure of a molded case circuit breaker of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the housing of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the support plate of the present invention;

[0030] Figure 4 It is a structural schematic diagram of the second spring of the present invention;

[0031] Figure 5 This is a schematic diagram of the structure of the first gear of the present invention;

[0032] Figure 6 It is a structural schematic diagram of the movable block of the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of the connecting plate of the present invention;

[0034] Figure 8 This is a structural schematic diagram of the card board of the present invention;

[0035] Fig. 9 It is a schematic diagram of the structure of the third spring of the present invention;

[0036] Fig.10 This is a schematic diagram of the housing structure of the present invention;

[0037] Fig.11 A schematic diagram of the charge storage unit process of the present invention;

[0038] Fig.12 It is a schematic diagram of the charge release unit process of the present invention.

[0039] In the figure:

[0040] 100. Shell;

[0041] 200, support plate; 201, fixing block; 202, telescopic rod; 203, first spring; 204, contact plate; 205, contact pole axis; 206, insulating member; 207, handle;

[0042] 300, substrate; 301, slider; 302, slide groove;

[0043] 400, a card block; 401, an adapting slot; 402, a lever; 403, a connecting plate; 404, a torsion spring; 405, a guide block; 406, a first electromagnet; 407, a first capacitor;

[0044] 500, first gear; 501, second gear; 502, rack; 503, slide rail; 504, first support plate; 505, second spring; 506, second support plate; 507, second electromagnet; 508, second capacitor;

[0045] 600, support frame; 601, movable block; 602, positioning rod; 603, third spring; 604, plug plate; 605, clamping plate; 606, clamping slot; 607, mounting frame; 608, first permanent magnet; 609, second permanent magnet. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention. Embodiment 1:

[0047] like Figures 1 to 12 As shown, a molded case circuit breaker includes a housing 100, a contact plate 204 and a contact pole shaft 205 are arranged inside the housing 100, and the connection state of the circuit breaker circuit is changed by controlling the connection state of the contact plate 204 and the contact pole shaft 205;

[0048] Elastic disconnecting mechanisms are provided on both sides of the contact pole shaft 205, and the elastic disconnecting mechanisms include a positioning rod 602, on which a movable block 601 is movably sleeved, and on which a third spring 603 is movably sleeved. The disconnecting mechanism controls the contact pole shaft 205 to be disconnected from the contact pole plate 204 through the elastic force of the third spring 603;

[0049] Electromagnetic assist mechanisms are also provided on both sides of the contact pole shaft 205, and the electromagnetic assist mechanisms include a second electromagnet 507, and a second capacitor 508 is installed on the second electromagnet 507. A transmission assembly is provided on one side of the second electromagnet 507. A clamping block 400 is rotatably installed at the bottom of the contact pole shaft 205, and an adapter groove 401 is provided on the clamping block 400. The second electromagnet 507 drives the clamping block 400 to rotate through the transmission assembly.

[0050] like Figure 4 , Figure 5 , Figure 6 , Figure 8As shown, in a specific embodiment, the elastic breaking mechanism also includes a support frame 600, a movable block 601 is slidably connected to both sides of the support frame 600, a plug-in plate 604 is movably plugged into the movable block 601, a card plate 605 is fixedly installed on one side of the plug-in plate 604, a card slot 606 is opened on one side of the support frame 600, the card slot 606 is adapted to the card plate 605, a second permanent magnet 609 is fixedly installed on one side of the card plate 605, a mounting frame 607 is fixedly installed on one side of the support frame 600, a first permanent magnet 608 is fixedly installed on the bottom of the mounting frame 607, and the first permanent magnet 608 and the second permanent magnet 609 are close to each other on one side, and the same charges repel each other. In this setting, when the card block 400 rotates to the movable block 601, one end of the card block 400 abuts against one end of the plug plate 604, so that the end of the plug plate 604 pushes the card plate 605 to move and disengage from the card slot 606. During reset installation, the plug plate 604 and the card plate 605 are driven upward by the movable block 601. When the card plate 605 moves to the card slot 606, the first permanent magnet 608 and the second permanent magnet 609 cause the card plate 605 to be stuck in the card slot 606 to complete the reset.

[0051] like Figure 4 , Figure 5 As shown, further, the transmission assembly also includes a first gear 500 and a second gear 501, the first gear 500 and the second gear 501 are both fixedly connected to the block 400, and the two adjacent first gears 500 are meshed with each other, the bottom of the second gear 501 is meshed with a rack 502, a slide rail 503 is slidably installed at the bottom of the rack 502, the second electromagnet 507 is fixedly installed at both ends of the slide rail 503, one end of the rack 502 is fixedly installed with a first support plate 504, and the first support plate 504 is made of magnetic material, one end of the first support plate 504 is fixedly installed with a second spring 505, one end of the second spring 505 is fixedly installed with a second support plate 506, and the second support plate 506 is fixedly installed on the slide rail 503. In this setting, the first gear 500 plays a synchronization role. When the voltage of the circuit where the molded case circuit breaker is located is higher than the normal value, the automatic switch S2 connects the second capacitor 508 with the second electromagnet 507. At this time, the second capacitor 508 and the second electromagnet 507 form a closed loop and make the second electromagnet 507 work. The suction force of the second electromagnet 507 attracts the first support plate 504 to move, and the first support plate 504 drives the rack 502 to move. The rack 502 drives the second gear 501 to rotate by meshing with the second gear 501, thereby rotating the block 400. Embodiment 2:

[0052] like Figure 4-Figure 7As shown, in a specific embodiment, the electromagnetic assist mechanism also includes a clamping component, the clamping component includes a connecting plate 403 and a lever 402, the connecting plate 403 is made of magnetic material, a guide block 405 is fixedly installed at the bottom of the connecting plate 403, one end of the lever 402 is fixedly connected to the clamping block 400, the lever 402 is adapted to the guide block 405, the connecting plate 403 is rotatably connected to the contact pole shaft 205, and a torsion spring 404 is installed at the connection between the connecting plate 403 and the contact pole shaft 205, a magnetic control component is arranged on one side of the clamping component, the magnetic control component includes a first electromagnet 406, the first electromagnet 406 is fixedly installed on the slide rail 503, and a first capacitor 407 is installed on the first electromagnet 406. In this configuration, the block 400 rotates, driving the lever 402 to rotate. The lever 402 pushes away the guide block 405 during rotation. When the first electromagnet 406 is energized, it attracts the connecting plate 403 to tilt up and drives the guide block 405 to stagger with the lever 402.

[0053] like Figure 2 , Figure 3 As shown, further, a support plate 200 is also installed in the housing 100, and a clamping assembly is arranged at the bottom of the support plate 200. The clamping assembly includes a fixed block 201, and the fixed block 201 is fixedly installed at the bottom of the support plate 200. A telescopic rod 202 is fixedly installed at one end of the fixed block 201, and one end of the telescopic rod 202 is fixedly connected to the contact plate 204. A first spring 203 is movably sleeved on the telescopic rod 202, and the clamping assembly keeps the contact plate 204 and the contact pole shaft 205 in a clamped state through the first spring 203. In this setting, the elastic force of the first spring 203 ensures that the contact plate 204 and the contact pole shaft 205 are kept in contact, and during the installation process, the contact area between the contact pole shaft 205 and the contact plate 204 gradually increases, thereby gradually increasing the current between the two.

[0054] like Figure 2 , Fig. 9 As shown, further, a base plate 300 is installed in the housing 100, and a sliding assembly is arranged on the base plate 300, and the sliding assembly includes a slider 301, and a slide groove 302 is provided on the contact pole shaft 205. The contact pole shaft 205 is movably connected to the base plate 300 through the slider 301 and the slide groove 302. An insulating member 206 is fixedly installed at the bottom of the contact pole shaft 205, and one end of the insulating member 206 is rotatably connected to a handle 207, and one end of the handle 207 is rotatably connected to the inner wall of the housing 100. In this setting, the sliding assembly is used to provide up and down movement conditions for the contact pole shaft 205. Embodiment 3:

[0055] like Figure 11 to Figure 12 As shown, it also includes a microprocessor, a charge storage unit and a charge release unit, and the microprocessor is equipped with a disconnection system for controlling the charge storage unit and the charge release unit;

[0056] The charge storage unit is used to control the first capacitor 407 and the second capacitor 508 to store charges;

[0057] The charge release unit is used to control the first capacitor 407 and the second capacitor 508 to release the charge and act on the first electromagnet 406 and the second electromagnet 507 respectively.

[0058] The charge storage unit includes a first storage strategy and a second storage strategy, the first storage strategy is used to control the charge storage of the first capacitor 407, and the second storage strategy is used to control the charge storage of the second capacitor 508;

[0059] The first storage strategy includes configuring an automatic switch S1, the automatic switch S1 is used to control the connection and disconnection of the first capacitor 407 with the power supply, the first storage strategy includes obtaining the rated voltage and the real-time voltage of the first capacitor 407, when the rated voltage of the first capacitor 407 is greater than the real-time voltage, it indicates that the first capacitor 407 is not fully charged, and a first charging instruction is generated, based on the first charging instruction, the automatic switch S1 is controlled to connect the first capacitor 407 with the power supply, when the rated voltage of the first capacitor 407 is equal to the real-time voltage, it indicates that the first capacitor 407 is fully charged, and a first power-off instruction is generated, and the automatic switch S1 is controlled to be disconnected from the first capacitor 407 based on the power-off instruction;

[0060] The second storage strategy includes being configured with an automatic switch S2, and the automatic switch S2 is used to control the connection and disconnection of the second capacitor 508 with the power supply. The second storage strategy includes obtaining the rated voltage and the real-time voltage of the second capacitor 508. When the rated voltage of the second capacitor 508 is greater than the real-time voltage, it indicates that the second capacitor 508 is not fully charged, and a second charging instruction is generated. Based on the second charging instruction, the automatic switch S2 is controlled to connect the second capacitor 508 with the power supply. When the rated voltage of the second capacitor 508 is equal to the real-time voltage, it indicates that the second capacitor 508 is fully charged, and a second power-off instruction is generated. Based on the power-off instruction, the automatic switch S2 is controlled to disconnect from the second capacitor 508.

[0061] The charge release unit includes a first release strategy and a second release strategy, the first release strategy is used to control the first capacitor 407 to release the charge and act on the first electromagnet 406, and the second release strategy is used to control the second capacitor 508 to release the charge and act on the second electromagnet 507;

[0062] The first release strategy includes configuring a start-up logic in the automatic switch S1, the start-up logic includes obtaining the current of the molded case circuit breaker at the contact pole shaft 205, when the current is in an increasing state, it indicates that the molded case circuit breaker is in a power-on process, when the current maintains a stable state, it indicates that the molded case circuit breaker is fully connected, and generates a first magnetic attraction instruction, based on the first magnetic attraction instruction, controls the automatic switch S1 to connect the first capacitor 407 with the first electromagnet 406, and ends the first magnetic attraction instruction when the charge of the first capacitor 407 is exhausted, and puts the automatic switch S1 in an empty command state, and based on the empty command, keeps the automatic switch S1 disconnected from the power supply and the first electromagnet 406;

[0063] The second release strategy includes obtaining the standard voltage of the power supply, and configuring an execution logic in the automatic switch S2, the execution logic includes obtaining the real-time voltage state of the power supply, when the real-time voltage of the power supply is higher than the standard voltage, it indicates that the voltage of the molded case circuit breaker is higher than the rated value, and generating a second magnetic attraction instruction, based on the second magnetic attraction instruction, controlling the automatic switch S2 to connect the second capacitor 508 with the second electromagnet 507, and ending the second magnetic attraction instruction when the charge of the second capacitor 508 is exhausted, and putting the automatic switch S2 in an empty command state, and keeping the automatic switch S2 and the power supply and the second electromagnet 507 disconnected based on the empty command;

[0064] Among them, the power supply is powered by the circuit where the molded case circuit breaker is located. After the voltage is stepped down by the transformer, the voltage at both ends of the power supply is adapted to the rated voltage of the first capacitor 407 and the second capacitor 508. At the same time, a rectifier is installed between the molded case circuit breaker and the power supply. After passing through the rectifier, the current is converted from AC to DC and supplies power to the power supply.

[0065] The implementation principle of a molded case circuit breaker of this embodiment is as follows: in normal working state, the circuit where the molded case circuit breaker is located supplies power to the power supply through the transformer and the rectifier, and the power supply supplies power to the first capacitor 407 and the second capacitor 508 to store charge;

[0066] When the voltage of the circuit where the molded case circuit breaker is located is higher than the normal value, the automatic switch S2 connects the second capacitor 508 with the second electromagnet 507. At this time, the second capacitor 508 and the second electromagnet 507 form a closed loop and make the second electromagnet 507 work. The suction force of the second electromagnet 507 attracts the first support plate 504 to move, and the first support plate 504 drives the rack 502 to move. The rack 502 drives the second gear 501 to rotate by meshing with the second gear 501, thereby rotating the block 400. When the block 400 rotates to the movable block 601, one end of the block 400 abuts against one end of the plug plate 604, so that one end of the plug plate 604 pushes the card plate 605 to move and disengage from the card slot 606. When the block 400 rotates, it drives the lever 402 to rotate. During the rotation of the lever 402, the guide block 405 is pushed away and staggered with the guide block 405.

[0067] At this time, the elastic force of the third spring 603 acts on the movable block 601, and the movable block 601 drives the contact pole shaft 205 to move by pressing against the clamping block 400, so that it is separated from the contact pole plate 204, thereby disconnecting the circuit;

[0068] After the molded case circuit breaker is disconnected, the charge in the second capacitor 508 is quickly exhausted, causing the second electromagnet 507 to lose its magnetic force. At this time, the elastic force of the second spring 505 acts on the block 400 and the lever 402 through the second gear 501 and the rack 502. Since the lever 402 is blocked by the guide block 405, the elastic force is finally converted into a thrust force of the lever 402 on the guide block 405.

[0069] When resetting the molded case circuit breaker, the handle 207 is pushed upward, and the handle 207 drives the contact pole shaft 205 to move upward as a whole. When the contact pole shaft 205 begins to contact the contact pole plate 204, the molded case circuit breaker is energized so that the power supply starts to supply power. As the contact area between the contact pole shaft 205 and the contact pole plate 204 gradually increases, the current value between the two gradually increases. When the contact pole shaft 205 and the contact pole plate 204 are fully in contact, the current is in a stable state. After the automatic switch S1 detects that the current has reached a stable state, it controls the first capacitor 407 and the first electromagnet 406 to form a closed loop. At this time, the first electromagnet 406 is energized and attracts the connecting plate 403 to tilt up, and drives the guide block 405 to stagger with the lever 402, so that the lever 402 can be reset;

[0070] When the contact pole shaft 205 moves upward, the movable block 601 drives the plug plate 604 and the clamping plate 605 to move upward. When the clamping plate 605 moves to the clamping slot 606, the first permanent magnet 608 and the second permanent magnet 609 clamp the clamping plate 605 into the clamping slot 606 to complete the reset.

[0071] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A molded case circuit breaker, comprising a housing (100), characterized in that: A contact plate (204) and a contact pole shaft (205) are provided inside the housing (100), and the connection state of the circuit breaker circuit is changed by controlling the connection state of the contact plate (204) and the contact pole shaft (205); Elastic disconnecting mechanisms are provided on both sides of the contact pole shaft (205), the elastic disconnecting mechanisms comprising a positioning rod (602), a movable block (601) being movably sleeved on the positioning rod (602), and a third spring (603) being movably sleeved on the positioning rod (602), the disconnecting mechanism controlling the contact pole shaft (205) to disconnect from the contact pole plate (204) through the elastic force of the third spring (603); Electromagnetic assist mechanisms are also provided on both sides of the contact pole shaft (205), the electromagnetic assist mechanisms comprising a second electromagnet (507), and a second capacitor (508) is mounted on the second electromagnet (507); a transmission assembly is provided on one side of the second electromagnet (507); a clamping block (400) is rotatably mounted on the bottom of the contact pole shaft (205), and an adaption slot (401) is provided on the clamping block (400); the second electromagnet (507) drives the clamping block (400) to rotate via the transmission assembly; The elastic breaking mechanism also includes a support frame (600), the movable block (601) is slidably connected to both sides of the support frame (600), a plug plate (604) is movably plugged into the movable block (601), a card plate (605) is fixedly mounted on one side of the plug plate (604), a card slot (606) is provided on one side of the support frame (600), the card slot (606) is adapted to the card plate (605), a second permanent magnet (609) is fixedly mounted on one side of the card plate (605), a mounting frame (607) is fixedly mounted on one side of the support frame (600), a first permanent magnet (608) is fixedly mounted on the bottom of the mounting frame (607), and the first permanent magnet (608) and the second permanent magnet (609) are repelled by the same polarity when they are close to each other; The transmission assembly further comprises a first gear (500) and a second gear (501), wherein the first gear (500) and the second gear (501) are both fixedly connected to the block (400), and two adjacent first gears (500) are meshed with each other, a rack (502) is meshedly connected at the bottom of the second gear (501), a slide rail (503) is slidably mounted at the bottom of the rack (502), the second electromagnet (507) is fixedly mounted at both ends of the slide rail (503), a first support plate (504) is fixedly mounted at one end of the rack (502), and the first support plate (504) is made of magnetic material, a second spring (505) is fixedly mounted at one end of the first support plate (504), a second support plate (506) is fixedly mounted at one end of the second spring (505), and the second support plate (506) is fixedly mounted on the slide rail (503); The electromagnetic assist mechanism further comprises a clamping assembly, the clamping assembly comprising a connecting plate (403) and a lever (402), the connecting plate (403) being made of a magnetic material, a guide block (405) being fixedly mounted on the bottom of the connecting plate (403), one end of the lever (402) being fixedly connected to the clamping block (400), the lever (402) being adapted to the guide block (405), the connecting plate (403) being rotatably connected to the contact pole shaft (205), and a torsion spring (404) being mounted at the connection between the connecting plate (403) and the contact pole shaft (205), a magnetic control assembly being arranged on one side of the clamping assembly, the magnetic control assembly comprising a first electromagnet (406), the first electromagnet (406) being fixedly mounted on the slide rail (503), and a first capacitor (407) being mounted on the first electromagnet (406).

2. A molded case circuit breaker according to claim 1, characterized in that: A support plate (200) is also installed in the housing (100), and a clamping assembly is arranged at the bottom of the support plate (200). The clamping assembly comprises a fixed block (201), and the fixed block (201) is fixedly installed at the bottom of the support plate (200). A telescopic rod (202) is fixedly installed at one end of the fixed block (201), and one end of the telescopic rod (202) is fixedly connected to a contact plate (204). A first spring (203) is movably sleeved on the telescopic rod (202), and the clamping assembly keeps the contact plate (204) and the contact pole shaft (205) in a clamped state through the first spring (203).

3. A molded case circuit breaker according to claim 2, characterized in that: A base plate (300) is also installed in the housing (100). A sliding assembly is arranged on the base plate (300). The sliding assembly includes a slider (301). A sliding groove (302) is provided on the contact pole shaft (205). The contact pole shaft (205) is movably connected to the base plate (300) through the slider (301) and the sliding groove (302). An insulating member (206) is fixedly installed at the bottom of the contact pole shaft (205). One end of the insulating member (206) is rotatably connected to a handle (207). One end of the handle (207) is rotatably connected to the inner wall of the housing (100).

4. The molded case circuit breaker according to any one of claims 1 to 3, characterized in that: It also includes a microprocessor, a charge storage unit and a charge release unit, wherein the microprocessor is provided with a disconnection system for controlling the charge storage unit and the charge release unit; The charge storage unit is used to control the first capacitor (407) and the second capacitor (508) to store charges; The charge release unit is used to control the first capacitor (407) and the second capacitor (508) to release the charge and act on the first electromagnet (406) and the second electromagnet (507) respectively.

5. A molded case circuit breaker according to claim 4, characterized in that: The charge storage unit comprises a first storage strategy and a second storage strategy, the first storage strategy is used to control the charge storage of the first capacitor (407), and the second storage strategy is used to control the charge storage of the second capacitor (508); The first storage strategy includes an automatic switch S1 configured, the automatic switch S1 is used to control the connection and disconnection of the first capacitor (407) with the power supply, the first storage strategy includes obtaining the rated voltage and the real-time voltage of the first capacitor (407), when the rated voltage of the first capacitor (407) is greater than the real-time voltage, it indicates that the first capacitor (407) is not fully charged, and a first charging instruction is generated, based on the first charging instruction, the automatic switch S1 is controlled to connect the first capacitor (407) with the power supply, when the rated voltage of the first capacitor (407) is equal to the real-time voltage, it indicates that the first capacitor (407) is fully charged, and a first power-off instruction is generated, and based on the power-off instruction, the automatic switch S1 is controlled to disconnect from the first capacitor (407); The second storage strategy includes an automatic switch S2 configured, the automatic switch S2 is used to control the connection and disconnection of the second capacitor (508) with the power supply, the second storage strategy includes obtaining the rated voltage and the real-time voltage of the second capacitor (508), when the rated voltage of the second capacitor (508) is greater than the real-time voltage, it indicates that the second capacitor (508) is not fully charged, and a second charging instruction is generated, based on the second charging instruction, the automatic switch S2 is controlled to connect the second capacitor (508) with the power supply, when the rated voltage of the second capacitor (508) is equal to the real-time voltage, it indicates that the second capacitor (508) is fully charged, and a second power-off instruction is generated, and based on the power-off instruction, the automatic switch S2 is controlled to disconnect from the second capacitor (508).

6. A molded case circuit breaker according to claim 5, characterized in that: The charge release unit comprises a first release strategy and a second release strategy, the first release strategy being used to control the first capacitor (407) to release charge and act on the first electromagnet (406), and the second release strategy being used to control the second capacitor (508) to release charge and act on the second electromagnet (507); The first release strategy includes configuring a start-up logic in the automatic switch S1, the start-up logic includes obtaining the current of the molded case circuit breaker at the contact pole shaft (205), when the current is in an increasing state, it indicates that the molded case circuit breaker is in the power-on process, when the current maintains a stable state, it indicates that the molded case circuit breaker is fully connected, and generating a first magnetic attraction instruction, based on the first magnetic attraction instruction, controlling the automatic switch S1 to connect the first capacitor (407) with the first electromagnet (406).

7. A molded case circuit breaker according to claim 6, characterized in that: The second release strategy includes obtaining a standard voltage of a power supply, and configuring an execution logic in the automatic switch S2, wherein the execution logic includes obtaining a real-time voltage state of the power supply, and when the real-time voltage of the power supply is higher than the standard voltage, it indicates that the voltage of the molded case circuit breaker is higher than the rated value, and generates a second magnetic attraction instruction, and based on the second magnetic attraction instruction, controls the automatic switch S2 to connect the second capacitor (508) with the second electromagnet (507).

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