An intelligent protection type miniature circuit breaker

Abstract

The present invention relates to the technical field of circuit breakers, and in particular to an intelligent protective miniature circuit breaker, comprising a shell, and also comprising: a static contact fixedly connected to the inside of the shell; a moving contact rotatably connected to the inside of the shell; an arc extinguishing device arranged inside the shell, and used to extinguish the arc generated when the static contact and the moving contact are disconnected; an electromagnetic switch component, and the electromagnetic switch component is used to push the moving contact to separate from the static contact when the current value is too large to protect the circuit; the present invention arranges a scraping device, and controls the scraping device to clean the oxide layer generated on the surface of the moving contact, so that the oxide on the moving contact is cleaned off. The scraping device can be arranged to facilitate the removal of the oxide layer on the surface of the moving contact, so as to reduce the resistance when the moving contact contacts the static contact, thereby facilitating the closure between the moving contact and the static contact to realize the energization of the circuit.

Description

Technical Field

[0001] The present invention relates to the field of circuit breakers, and in particular to an intelligent protection type miniature circuit breaker. Background Art

[0002] Circuit breakers are important protective devices in power systems, mainly used for connecting and disconnecting lines and protecting against various faults in the system.

[0003] In the prior art, the main contacts of the circuit breaker may not close or disconnect automatically during the closing period. The main reason is that the circuit breaker is under high voltage for a long time, which causes oxidation on the surface of the contact point of the contact, increases the contact resistance, and then causes the contact to fail to work normally, thereby causing some unnecessary damage. If the above situation occurs, it is generally necessary to disassemble the circuit breaker casing to deal with the oxidation point, and disassembling the circuit breaker requires professionals, which brings great inconvenience to the user. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an intelligent protection type miniature circuit breaker.

[0005] In order to achieve the above objectives, the technical solution adopted by the present invention is: an intelligent protection type miniature circuit breaker, including a housing, and also including:

[0006] A stationary contact, fixedly connected to the interior of the housing;

[0007] A moving contact rotatably connected to the interior of the housing;

[0008] An arc extinguishing device, arranged inside the housing, for extinguishing an arc generated when the static contact and the moving contact are disconnected;

[0009] An electromagnetic switch assembly, wherein the electromagnetic switch assembly is used to push the moving contact to separate from the static contact when the current value is too large, so as to protect the circuit;

[0010] A light sensor, used to detect light information of the arc generated when the static contact and the moving contact are in contact, and record the number of times the light information is continuously generated;

[0011] A scraping device, the scraping device is arranged inside the shell;

[0012] A control unit, which makes a judgment based on the continuous generation information of the electric arc, and when it is detected that the number of times the electric arc is generated is greater than or equal to two times, controls the scraping device to scrape off the oxidized deposits at the contact point between the moving contact and the stationary contact, so that the moving contact and the stationary contact are closed;

[0013] The present invention cleans the oxide layer generated on the surface of the moving contact by controlling the scraping device through the setting of the scraping device, so that the oxide on the moving contact is cleaned off. The setting of the scraping device can help to remove the oxide layer on the surface of the moving contact to reduce the resistance when the moving contact contacts the stationary contact, thereby facilitating the closure between the moving contact and the stationary contact to realize the energization of the circuit.

[0014] Preferably, the scraping device comprises:

[0015] A first pushing component, wherein the first pushing component is fixedly connected to the inner wall of the shell;

[0016] A U-shaped seat, slidably disposed on the top of the first pushing component;

[0017] A second pushing assembly is fixedly connected to the side wall of the housing;

[0018] Wherein, the first pushing assembly is used to vertically adjust the distance between the U-shaped seat and the top of the moving contact, and the second pushing assembly is used to horizontally push the U-shaped seat to move along the surface of the moving contact;

[0019] A fixed seat, fixedly connected between two side walls of the U-shaped seat, and the fixed seat is tilted, and the tilt angle of the fixed seat is consistent with the tilt angle of the moving contact and the static contact after disconnection;

[0020] A triangular scraper is fixedly connected to the side wall of the fixing seat and is used for scraping off the oxide layer on the surface of the moving contact.

[0021] Preferably, it also includes:

[0022] A cavity is provided inside the fixing seat;

[0023] Two L-shaped sliding blocks are provided, which are symmetrically slidably connected to the inside of the cavity and are used to push and collect the oxidized deposits on the top of the triangular scraper;

[0024] A linear drive assembly, disposed inside the U-shaped seat, for pushing the two L-shaped slide blocks to slide along the side walls of the fixed seat;

[0025] The collecting block is provided with two ends of the L-shaped sliding block which are arranged at corresponding positions through a vibration assembly;

[0026] The collecting components are arranged on both sides of the collecting block and are used to push and collect the oxidized attachments scraped off by the triangular scraper.

[0027] Preferably, the linear drive assembly comprises:

[0028] A driving motor is fixedly connected to the side wall of the U-shaped seat through a mounting plate;

[0029] A bidirectional threaded rod, one end of which is fixedly connected to the output shaft end of the driving motor, and the other end of which is rotatably connected to the side wall of the U-shaped seat;

[0030] Two connecting frames are provided and are respectively threadedly connected to different threaded parts of the bidirectional threaded rod;

[0031] Two L-shaped plates are provided, which are respectively fixedly connected to the bottom ends of the two connecting frames, and the L-shaped plates are slidably connected to the L-shaped sliders;

[0032] There are four shielding plates, two of which form a group, and the two shielding plates in the same group are fixedly connected to the side wall of the L-shaped plate and are located inside the cavity;

[0033] A sliding column, fixedly connected to a side of the L-shaped sliding block close to the cavity, and one end of the sliding column extends into the interior of the cavity;

[0034] An elastic member, located between the two shielding plates, and fixedly connected between the sliding column and the L-shaped plate;

[0035] A slide plate is fixedly connected to the end of the slide column, and the slide plate is slidably connected to the cavity.

[0036] Preferably, the collecting assembly comprises:

[0037] Two shovel blocks are provided, which are symmetrically fixedly connected to the two side walls of the collecting block and are used to scrape and clean the oxide layer on the traveling path;

[0038] The collecting chamber is opened at the top of the shovel block and is used to collect the oxidized deposits removed by the shovel block to prevent the oxidized deposits from adhering to the surface of the moving contact again.

[0039] Preferably, it also includes:

[0040] A through groove is provided on the top of the collecting block;

[0041] A grinding stone, slidably connected to the inside of the through groove, for grinding the scraped surface of the moving contact;

[0042] The limit assembly is used to limit the moving track of the grinding sandstone so that the grinding sandstone can only move downward.

[0043] Preferably, it also includes:

[0044] A top block, fixedly connected to the top of the fixing seat;

[0045] A plurality of interception blocks are provided and fixed on the side wall of the top block in a linear array;

[0046] A support column, fixedly connected to the top of the L-shaped slider;

[0047] Wherein, a yielding opening is provided on the interception block, and the interception block is made of a material with certain flexibility.

[0048] Preferably, the reciprocating assembly comprises:

[0049] Two fixed clamping seats are provided and are symmetrically fixedly connected to the ends of the L-shaped slider;

[0050] A support rod, fixedly connected between the two fixed clamping seats, and the collecting block is slidably connected to the support rod;

[0051] Wherein, torsion springs are fixedly connected between the two fixed clamping seats and the two side walls of the collecting block, and the two torsion springs are symmetrically sleeved on the outer wall of the support rod.

[0052] Preferably, the electromagnetic switch assembly comprises:

[0053] A central lever is rotatably disposed inside the housing, and a left end of the central lever is located above the moving contact;

[0054] An operating handle is rotatably disposed inside the housing and extends through and to the outside of the housing;

[0055] When the current exceeds a specified value, the electromagnetic switch assembly will push the moving contact to separate from the static contact to achieve automatic power off.

[0056] Preferably, the limiting component comprises:

[0057] A swivel seat, fixedly connected to the inner wall of the through groove;

[0058] The roller is connected to the rotating seat for unidirectional rotation.

[0059] Compared with the prior art, the present invention has the following beneficial effects:

[0060] 1. The present invention cleans the oxide layer generated on the surface of the moving contact by controlling the scraping device through the setting of the scraping device, so that the oxide on the moving contact is cleaned. The setting of the scraping device can help to remove the oxide layer on the surface of the moving contact to reduce the resistance when the moving contact contacts the stationary contact, thereby facilitating the closure between the moving contact and the stationary contact to realize the energization of the circuit.

[0061] 2. The present invention provides a shovel block, so that the connection point between the moving contact and the stationary contact is cleaned again by the shovel block, which is beneficial for the shovel block to scrape off the oxide layer at the connection point between the moving contact and the stationary contact. In the process of scraping, the shovel block collects the scraped oxide attachments through the collection chamber, which is beneficial for avoiding the oxide attachments from remaining on the top of the moving contact, causing the moving contact and the stationary contact to be difficult to contact.

[0062] 3. The present invention arranges the grinding sand and stone so that the grinding sand and stone will always grind the surface of the moving contact after scraping and cleaning, thereby helping to avoid the situation where it is difficult to clean the oxide layer just by grinding. By grinding the cleaned surface of the moving contact, the oxide layer on the surface of the moving contact is completely eliminated, so as to reduce the resistance when the moving contact contacts with the stationary contact, which is beneficial to the electrical connection between the moving contact and the stationary contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 It is a schematic diagram of the overall structure of the circuit breaker of the present invention.

[0064] Figure 2 The structure of the present invention along the shell section is schematically shown. Figure 1 .

[0065] Figure 3 The structure of the present invention along the shell section is schematically shown. Figure 2 .

[0066] Figure 4 The structure diagram of the connection between the U-shaped seat and the fixed seat of the present invention is shown in FIG. Figure 1 .

[0067] Figure 5 The structure diagram of the connection between the U-shaped seat and the fixed seat of the present invention is shown in FIG. Figure 2 .

[0068] Figure 6 It is a structural schematic diagram of the fixing seat of the present invention.

[0069] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure at point A in the middle.

[0070] Figure 8 It is a schematic structural diagram of the present invention along the cross section of the fixing seat.

[0071] Fig. 9 It is a schematic structural diagram of the present invention after further sectioning along the fixing seat.

[0072] Fig.10 For the present invention Fig. 9 Schematic diagram of the enlarged structure at point B in the middle.

[0073] Fig.11 It is a schematic diagram of the structure of the collection block of the present invention.

[0074] Fig.12 It is a schematic diagram of the structure after the grinding sand and gravel are removed in the present invention.

[0075] In the figure: 1, housing; 2, static contact; 3, moving contact; 4, first push assembly; 5, U-shaped seat; 6, second push assembly; 601, card seat; 7, fixed seat; 8, triangular scraper; 9, L-shaped slider; 10, collection block; 11, driving motor; 12, two-way threaded rod; 13, connecting frame; 14, L-shaped plate; 15, shielding plate; 16, sliding column; 17, elastic member; 18, shovel block; 19, collection chamber; 20, through Grooving; 21. Grinding sand and stone; 22. Top block; 23. Intercepting block; 24. Pillar; 25. Yield; 26. Fixed base; 27. Support rod; 28. Torsion spring; 29. ​​Central lever; 291. Connecting rod; 292. First spring; 293. Linkage frame; 294. Second spring; 30. Operating handle; 31. Cavity; 32. Swivel seat; 33. Roller; 34. Controller; 35. Light sensor; 36. Slide plate. DETAILED DESCRIPTION

[0076] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0077] Application scenarios: In the prior art, the main contacts of a circuit breaker may not close or disconnect automatically during the use process. The main reason is that the circuit breaker is under high voltage for a long time, which causes oxidation on the surface of the contact point, increases the contact resistance, and thus causes the contact to fail to work normally, thereby causing some unnecessary damage. If the above situation occurs, it is generally necessary to disassemble the circuit breaker casing to deal with the oxidation point. Disassembling the circuit breaker requires professionals, which brings great inconvenience to the user.

[0078] like Figures 1 to 12 The intelligent protection type miniature circuit breaker shown includes a housing 1, characterized in that it also includes:

[0079] The stationary contact 2 is fixedly connected to the inside of the housing 1;

[0080] The moving contact 3 is rotatably connected to the inside of the housing 1;

[0081] The arc extinguishing device is arranged inside the housing 1 and is used to extinguish the arc generated when the static contact 2 and the moving contact 3 are disconnected;

[0082] The electromagnetic switch assembly is used to push the moving contact 3 and the static contact 2 to separate when the current value is too large, so as to protect the circuit;

[0083] The scraping device is arranged inside the housing 1, and is used to scrape off the oxidized deposits at the contact point between the moving contact 3 and the stationary contact 2 when the stationary contact 2 and the moving contact 3 are not closed or are automatically disconnected during the closing period, so that the moving contact 3 and the stationary contact 2 are closed;

[0084] Specifically, the number of times the arc is generated is monitored by the set optical sensor 35. If the contact point between the moving contact 3 and the static contact 2 produces oxides due to long-term use, causing the resistance to increase, the static contact 2 and the moving contact 3 will not be closed or will disconnect by themselves during the closing period. At this time, the number of times the arc is generated will be greater than or equal to two, and it will be identified that an oxide layer appears at the contact point between the moving contact 3 and the static contact 2, making it difficult to complete the closing. Subsequently, the optical sensor 35 sends the detection result to the control unit, and then the control unit controls the scraping device to clean the oxide layer produced on the surface of the moving contact 3, so that the oxide on the moving contact 3 is cleaned up. By setting up the scraping device, it is helpful to remove the oxide layer on the surface of the moving contact 3, so as to reduce the resistance when the moving contact 3 contacts the static contact 2, thereby facilitating the closing between the moving contact 3 and the static contact 2 to realize the power-on of the circuit.

[0085] It should be noted that the static contact 2 includes a support frame and a first metal plate, the support frame is fixed inside the housing 1, and the first metal plate is fixed at the bottom of the support frame;

[0086] The moving contact 3 is specifically a second metal plate, which is rotatably arranged inside the shell 1. The second metal plate is located below the first metal plate. The right end of the second metal plate flips upward and contacts with the first metal plate, and the circuit is connected. The right end of the second metal plate flips downward and disengages from the first metal plate, and the circuit is disconnected, generating an arc. This is an existing mature technology and will not be elaborated here.

[0087] As an optional implementation, the arc extinguishing device includes an arc extinguishing chamber, and an arc extinguishing grid is fixedly installed inside the arc extinguishing chamber. The arc extinguishing device is an existing mature technology and will not be described here one by one;

[0088] Specifically, an arc will be generated when the moving contact 3 is disconnected from the static contact 2. After the arc is generated, it will enter the arc extinguishing chamber. When the arc contacts the arc extinguishing grid, it will be divided into multiple small arcs. These small arcs will be extinguished quickly in the air, thereby achieving the purpose of arc extinguishing protection circuit.

[0089] As an optional implementation, the control unit is specifically a controller 34 , and the controller 34 is fixedly connected to the outer wall of the shell 1 .

[0090] As a further embodiment, the scraping device comprises:

[0091] A first pushing component 4, the first pushing component 4 is fixedly connected to the inner wall of the housing 1;

[0092] A U-shaped seat 5 is slidably disposed on the top of the first pushing assembly 4;

[0093] The second pushing assembly 6 is fixedly connected to the side wall of the housing 1;

[0094] The first pushing assembly 4 is used to vertically adjust the distance between the U-shaped seat 5 and the top of the moving contact 3, and the second pushing assembly 6 is used to horizontally push the U-shaped seat 5 to move along the surface of the moving contact 3;

[0095] The fixing seat 7 is fixedly connected between the two side walls of the U-shaped seat 5, and the fixing seat 7 is tilted, and the tilt angle of the fixing seat 7 is consistent with the tilt angle after the moving contact 3 and the static contact 2 are disconnected;

[0096] A triangular scraper 8 is fixedly connected to the side wall of the fixing seat 7 and is used to scrape off the oxide layer on the surface of the moving contact 3;

[0097] Specifically, the control unit first controls the first pushing component 4 to start, and drives the U-shaped seat 5 toward the direction of the moving contact 3 through the first pushing component 4. Because the moving contact 3 is separated from the static contact 2, the moving contact 3 is in an inclined state. Since the fixed seat 7 is set according to the inclined direction of the moving contact 3, the fixed seat 7 will drive the triangular scraper 8 to contact the oxide layer on the top of the moving contact 3. Then the control unit controls the second pushing component 6 to push the U-shaped seat 5 to slide on the top of the first pushing component 4, and the U-shaped seat 5 drives the fixed seat 7 to move, and the fixed seat 7 drives the triangular scraper 8 to scrape and clean the oxide layer. By setting the triangular scraper 8 to scrape the oxide layer at the contact point between the moving contact 3 and the static contact 2, it is beneficial to reduce the impact of the oxide layer, which is beneficial for the moving contact 3 to be energized and work normally after contacting the static contact 2 again.

[0098] As an optional embodiment, the first pushing component 4 can be a pneumatic cylinder or a hydraulic cylinder, the fixed portion of the first pushing component 4 is fixedly connected to the inside of the housing 1, and the telescopic end of the first pushing component 4 is slidably connected to the bottom of the U-shaped seat 5 through a slider;

[0099] Specifically, the first pushing component 4 provides support for the U-shaped seat 5 , and the second pushing component 6 slides on the top of the slider when pushing the U-shaped seat 5 to move, thereby adapting to the movement trajectory of the U-shaped seat 5 .

[0100] As an optional embodiment, the second pushing component 6 can be an electric push rod or an automatic telescopic rod, the fixed part of the second pushing component 6 is fixedly connected to the housing 1, the telescopic end of the second pushing component 6 is slidably connected to a card seat 601, and the card seat 601 is fixedly connected to the U-shaped seat 5;

[0101] Specifically, the telescopic end of the second pushing component 6 is slidably connected to the base 601, so when the U-shaped base 5 moves downward, the base 601 moves downward with the U-shaped base 5, and the base 601 will generate relative movement with the second pushing component 6 to adapt to the downward movement distance of the U-shaped base 5.

[0102] As a further embodiment, it also includes:

[0103] The cavity 31 is opened inside the fixing seat 7;

[0104] Two L-shaped sliders 9 are provided, which are symmetrically slidably connected to the inside of the cavity 31 and are used to push and collect the oxidized deposits on the top of the triangular scraper 8;

[0105] A linear drive assembly is disposed inside the U-shaped seat 5 and is used to push the two L-shaped slide blocks 9 to slide along the side walls of the fixed seat 7;

[0106] The collecting block 10 is provided with two ends of the L-shaped slider 9 which are arranged at corresponding positions through the vibration assembly;

[0107] The collecting components are arranged on both sides of the collecting block 10 and are used to push and collect the oxidized deposits scraped off by the triangular scraper 8;

[0108] Specifically, in the above embodiment, it is mentioned that the oxide layer of the moving contact 3 is scraped off by setting a triangular scraper 8 to reduce the amount of oxide layer attached, so that the moving contact 3 and the stationary contact 2 can be normally contacted and powered on. After the triangular scraper 8 scrapes the oxide layer, it is difficult to ensure that it can be completely cleaned, and some impurities will be scraped out during the scraping process. If they are not collected and processed in time, the impurities are likely to adhere to the surface of the moving contact 3 again, affecting the opening and closing between the moving contact 3 and the stationary contact 2.

[0109] Therefore, after the triangular scraper 8 first scrapes the connection point between the moving contact 3 and the stationary contact 2, the control unit controls the second pushing component 6 to start returning again, so that the triangular scraper 8 returns and moves to the connection point between the moving contact 3 and the stationary contact 2. Subsequently, the control unit controls the linear drive component to start working, and the linear drive component drives the two L-shaped sliders 9 to approach each other. The two L-shaped sliders 9 drive the two collecting components to approach each other through the vibration component, so that the connection point between the moving contact 3 and the stationary contact 2 is scraped and cleaned by the two collecting components, and impurities are collected during the scraping and cleaning process, which is conducive to reducing the situation where impurities remain on the surface of the moving contact 3 again and affect the fit between the moving contact 3 and the stationary contact 2.

[0110] After the first cleaning is completed, the control unit controls the linear drive assembly to drive the two L-shaped sliders 9 to move away from each other, and the two L-shaped sliders 9 drive the two collecting assemblies to move away from each other through the vibration assembly, so that the two collecting assemblies scrape and clean the connection point between the moving contact 3 and the static contact 2 again and collect the two collecting assemblies in the process of moving away from each other, so that the secondary cleaning is conducive to cleaning the oxide layer and reducing the oxide attachments remaining on the surface of the moving contact 3;

[0111] After the two collecting components return to their positions, the control unit controls the second pushing component 6 to start pushing again, and the second pushing component 6 pushes the triangular scraper 8 to clean the connection point between the cleaned moving contact 3 and the static contact 2 for the third time. Through the cooperation between the two, the oxide layer can be cleaned.

[0112] As a further embodiment, the linear drive assembly comprises:

[0113] The driving motor 11 is fixedly connected to the side wall of the U-shaped seat 5 through a mounting plate;

[0114] A bidirectional threaded rod 12, one end of which is fixedly connected to the output shaft end of the driving motor 11, and the other end of which is rotatably connected to the side wall of the U-shaped seat 5;

[0115] There are two connecting frames 13, which are respectively threadedly connected to different threaded parts of the bidirectional threaded rod 12;

[0116] Two L-shaped plates 14 are provided, which are fixedly connected to the bottom ends of the two connecting frames 13 respectively, and the L-shaped plates 14 are slidably connected to the L-shaped sliders;

[0117] There are four shielding plates 15, two of which form a group, and the two shielding plates 15 in the same group are fixedly connected to the side wall of the L-shaped plate 14 and are located inside the cavity 31;

[0118] The slide post 16 is fixedly connected to a side of the L-shaped slide block 9 close to the cavity 31, and one end of the slide post 16 extends into the interior of the cavity 31;

[0119] The elastic member 17 is located between the two shielding plates 15 and is fixedly connected between the sliding column 16 and the L-shaped plate 14;

[0120] The slide plate 36 is fixedly connected to the end of the slide column 16, and the slide plate 36 is slidably connected to the cavity 31;

[0121] Specifically, the control unit controls the drive motor 11 to start, and the drive motor 11 drives the bidirectional threaded rod 12 to rotate, so that the two connecting frames 13 are close to each other under the action of the bidirectional threaded rod 12, and the two connecting frames 13 drive the two L-shaped plates 14 to approach each other. In the process of approaching each other, the two L-shaped plates 14 will push and collect the oxidized attachments remaining on the triangular scraper 8. In the process of approaching each other, the two L-shaped plates 14 drive the sliding column 16 to move through the elastic member 17, and the elastic member 17 is blocked by the baffle plate 15 to prevent the elastic member 17 from bending. The movement of the sliding column 16 will drive the slide plate 36 to slide along the inner wall of the cavity 31. At the same time, the sliding column 16 will also drive the L-shaped sliders 9 at the corresponding position to approach each other, thereby realizing the mutual approach or distance of the collecting components.

[0122] As an optional implementation, the elastic member 17 is specifically a spring.

[0123] As a further embodiment, the collection component includes:

[0124] Two shovel blocks 18 are provided, which are symmetrically fixedly connected to the two side walls of the collecting block 10 and are used to scrape and clean the oxide layer on the traveling path;

[0125] The collecting chamber 19 is provided at the top of the shovel block 18 and is used to collect the oxidized deposits removed by the shovel block 18 to prevent the oxidized deposits from adhering to the surface of the moving contact 3 again;

[0126] Specifically, when the two collecting blocks 10 approach each other, the shovel blocks 18 at the corresponding positions will be driven to approach each other, and the connection point between the moving contact 3 and the stationary contact 2 will be scraped off by the shovel blocks 18, because the triangular scraper 8 first scrapes and loosens the connection point between the moving contact 3 and the stationary contact 2, and then returns to the connection point between the moving contact 3 and the stationary contact 2. At this time, the oxide layer has been scraped off once, so the connection point between the moving contact 3 and the stationary contact 2 is cleaned again by the shovel blocks 18, which is conducive to making it easier for the shovel blocks 18 to scrape off the oxide layer at the connection point between the moving contact 3 and the stationary contact 2, and in the process of scraping, the shovel blocks 18 collect the scraped off oxide attachments through the collection chamber 19, which is conducive to avoiding the oxide attachments remaining on the top of the moving contact 3, causing the moving contact 3 and the stationary contact 2 to be difficult to fit;

[0127] When the two collecting blocks 10 move away from each other, the connection point between the moving contact 3 and the stationary contact 2 is cleaned again by the collecting assembly. After multiple cleanings, the oxidized deposits at the connection point between the moving contact 3 and the stationary contact 2 are cleaned up.

[0128] As a further embodiment, it also includes:

[0129] A through groove 20 is provided at the top of the collecting block 10;

[0130] Grinding sandstone 21, slidably connected to the inside of the through groove 20, for grinding the surface of the moving contact 3 after scraping;

[0131] A limit assembly, used to limit the moving track of the grinding stone 21, so that the grinding stone 21 can only move downward;

[0132] Specifically, in the above embodiment, it is mentioned that the connection point between the moving contact 3 and the stationary contact 2 is cleaned by multiple cooperation of the triangular scraper 8 and the shovel block 18. However, if the connection point between the moving contact 3 and the stationary contact 2 is cleaned only by scraping, it is difficult to completely clean the oxide layer, which may affect the connection between the moving contact 3 and the stationary contact 2.

[0133] Therefore, by setting the grinding sandstone 21, the grinding sandstone 21 will also be driven to move during the movement of the collecting block 10. Since the grinding sandstone 21 is set between the two shovel blocks 18, the grinding sandstone 21 will always grind the surface of the moving contact 3 after scraping and cleaning, which is conducive to avoiding the situation that it is difficult to clean the oxide layer by just grinding. By grinding the surface of the moving contact 3 after cleaning, the oxide layer on the surface of the moving contact 3 is completely worn away, so as to reduce the resistance when the moving contact 3 contacts the static contact 2, which is conducive to the electrical connection between the moving contact 3 and the static contact 2;

[0134] Because the grinding sand 21 will be worn out during use, the grinding sand 21 is slidably set inside the through groove 20, so that after the grinding sand 21 is consumed, the position is automatically lowered according to the consumption, so that the grinding sand 21 can always be in contact with the surface of the moving contact 3, and through the setting of the limiting component, the grinding sand 21 can only move downward, which helps to avoid the grinding sand 21 being forced to move upward, making it difficult for the grinding sand 21 to grind the surface of the moving contact 3.

[0135] As a further embodiment, it also includes:

[0136] A top block 22 is fixedly connected to the top of the fixing seat 7;

[0137] A plurality of interception blocks 23 are provided and fixed on the side wall of the top block 22 in a linear array;

[0138] A support column 24 is fixedly connected to the top of the L-shaped slide block 9;

[0139] The interception block 23 is provided with a clearance opening 25, and the interception block 23 is made of a material with a certain flexibility;

[0140] Specifically, in the above embodiment, it is mentioned that the L-shaped slider 9 is slidably connected to the L-shaped plate 14, and an elastic member 17 is provided between the slide post 16 and the L-shaped plate 14;

[0141] Therefore, when the L-shaped slider 9 moves, it will drive the pillar 24 to move. By setting the clearance opening 25 to be slightly smaller than the diameter of the pillar 24, the interception block 23 is made of rubber material, which will deform when subjected to force. Therefore, when the pillar 24 passes through the clearance opening 25 and is subjected to a smaller force, it will be intercepted by the clearance opening 25 first, causing the L-shaped slider 9 to stop moving. At this time, the connecting frame 13 will drive the L-shaped plate 14 to continue to move in the direction of the L-shaped slider 9 and compress the elastic member 17. When the elastic member 17 is compressed to the maximum contraction distance, the connecting frame 13 continues to drive the L-shaped plate 14 and the L-shaped slider 9. The force applied at this time will cause the pillar 24 to squeeze the clearance opening 25. Because the force applied at this time is relatively large, the clearance opening 25 will deform and give way, thereby causing the pillar 24 to move forward through the clearance opening 25. When the pillar 24 passes through the clearance opening 25, it loses its limit, so that the elastic member 17 will quickly release the spring force to push the L-shaped slider 9 forward. The L-shaped slider 9 drives the collection block 10 to move through the vibration assembly, and the collection block 10 drives the shovel block 18 to move. By accumulating force, the shovel block 18 is conducive to removing the oxidized attachments faster.

[0142] During the return process, the pillar 24 will be intercepted again when passing through the yield opening 25 on the interception block 23, and the connecting frame 13 drives the L-shaped plate 14 to continue to move in the direction away from the L-shaped slider 9, and stretches the elastic member 17. When the elastic member 17 is stretched to the maximum contraction distance, the connecting frame 13 continues to drive the L-shaped plate 14 and the L-shaped slider 9 to move synchronously. The force applied at this time will cause the pillar 24 to pass through the yield opening 25 again, so that the elastic member 17 is released to push the L-shaped slider 9 to move quickly. The L-shaped slider 9 drives the collecting block 10 to move through the vibration assembly, and the collecting block 10 drives the shovel block 18 to remove the oxidized attachments. Through two times of accumulated force removal and collection, it is beneficial to quickly clean up the oxidized attachments.

[0143] As a further embodiment, the vibration assembly includes:

[0144] Two fixed clamping seats 26 are provided and are symmetrically fixedly connected to the ends of the L-shaped slider 9;

[0145] A support rod 27 is fixedly connected between the two fixed bases 26, and the collecting block 10 is slidably connected to the support rod 27;

[0146] Among them, torsion springs 28 are fixedly connected between the two fixed seats 26 and the two side walls of the collecting block 10, and the two torsion springs 28 are symmetrically sleeved on the outer wall of the support rod 27;

[0147] Specifically, when the elastic member 17 accumulates force to push the L-shaped slider 9 to move, the L-shaped slider 9 drives the fixed base 26 to move, the fixed base 26 drives the collecting block 10 to move through the torsion spring 28, and the collecting block 10 drives the shovel block 18 to move, so that the shovel block 18 cleans the oxidized attachments;

[0148] When the elastic member 17 releases the spring force to push the L-shaped slider 9 to move, because the shovel block 18 is slidably connected to the support rod 27, the collecting block 10 will slide back and forth on the support rod 27 with a small amplitude under the action of the elastic force released by the elastic member 17, and the collecting block 10 will drive the grinding sandstone 21 to slide back and forth. The rapid reciprocating sliding of the grinding sandstone 21 on the surface of the moving contact 3 is conducive to the rapid grinding of the oxide layer on the surface of the moving contact 3 after cleaning by the grinding sandstone 21, so that the oxide layer at the connection point between the moving contact 3 and the static contact 2 is polished clean.

[0149] As a further embodiment, the electromagnetic switch assembly comprises:

[0150] A central lever 29 is rotatably disposed inside the housing 1, and a left end of the central lever 29 is located above the moving contact 3;

[0151] An operating handle 30 is rotatably disposed inside the housing 1 and extends through and to the outside of the housing 1;

[0152] When the current exceeds a specified value, the electromagnetic switch assembly will push the moving contact 3 to separate from the static contact 2 to achieve automatic power off.

[0153] It should be noted that the central lever 29 is rotatably arranged inside the shell 1, and the surface of the central lever 29 is rotatably connected to a connecting rod 291, and the other end of the connecting rod 291 is rotatably connected to the surface of the operating handle 30. A first spring 292 is fixedly connected between the surface of the central lever 29 and the support frame. The right bottom end of the central lever 29 has a hanging groove, and a linkage frame 293 is hung in the hanging groove. The end of the linkage frame 293 away from the central lever 29 is hung with a connecting groove opened at the bottom of the moving contact 3. A second spring 294 is sleeved on the linkage frame 293, and one end of the second spring 294 contacts the central lever 29, and the other end of the second spring 294 contacts the bending section on the surface of the linkage frame 293.

[0154] It should be noted that the electromagnetic switch assembly also includes an electromagnetic solenoid, the inner ring of the electromagnetic solenoid is movably provided with an iron core, a supporting spring is connected between the bottom end of the iron core and the support frame, the bottom end of the iron core is fixedly connected to a push piece, the push piece passes through the support frame and extends to the bottom of the support frame, the external circuit at the top of the circuit breaker is electrically connected to the top of the electromagnetic solenoid, which is an existing mature technology and will not be elaborated one by one.

[0155] As a further embodiment, the limiting component includes:

[0156] The rotating seat 32 is fixedly connected to the inner wall of the through groove 20;

[0157] The roller 33 is unidirectionally rotatably connected to the rotating seat 32;

[0158] Specifically, after the grinding sandstone 21 is consumed, the grinding sandstone 21 will slide downward along the through groove 20. At this time, the roller 33 does not limit the grinding sandstone 21. When the grinding sandstone 21 is forced to move upward, because the roller 33 is set on the rotating shaft of the swivel seat 32 through a one-way bearing, the one-way bearing will limit the rotation direction of the roller 33, so that the roller 33 can only rotate according to a predetermined trajectory. Through the one-way setting of the roller 33, the upward movement trajectory of the grinding sandstone 21 is limited, so that the grinding sandstone 21 cannot move upward, which is conducive to avoiding the grinding sandstone 21 from being forced to move upward, making it difficult to grind the oxide layer.

[0159] Working principle of the present invention:

[0160] The number of times the arc is generated is monitored by the set optical sensor 35. If the contact point between the moving contact 3 and the static contact 2 produces oxides due to long-term use, causing the resistance to increase, the static contact 2 and the moving contact 3 will not close or will disconnect by themselves during the closing period. At this time, the number of times the arc is generated will be greater than or equal to two, and it will be identified that an oxide layer appears at the contact point between the moving contact 3 and the static contact 2, making it difficult to complete the closing. Subsequently, the optical sensor 35 sends the detection result to the control unit, and then the control unit controls the scraping device to clean the oxide layer produced on the surface of the moving contact 3, so that the oxide on the moving contact 3 is cleaned up. By setting up the scraping device, it is helpful to remove the oxide layer on the surface of the moving contact 3, so as to reduce the resistance when the moving contact 3 contacts the static contact 2, thereby facilitating the closing between the moving contact 3 and the static contact 2 to realize the power-on of the circuit.

[0161] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. An intelligent protection type miniature circuit breaker, comprising a housing (1), characterized in that: Also includes: A stationary contact (2) fixedly connected inside the housing (1); A moving contact (3) rotatably connected to the interior of the housing (1); An arc extinguishing device, arranged inside the housing (1), and used to extinguish an arc generated when the static contact (2) and the moving contact (3) are disconnected; An electromagnetic switch assembly, the electromagnetic switch assembly being used to push the moving contact (3) to separate from the static contact (2) when the current value is too large, so as to protect the circuit; A light sensor (35) for detecting light information of an arc generated when the stationary contact (2) and the moving contact (3) are in contact, and recording the number of times the light information is continuously generated; A scraping device, the scraping device being arranged inside the housing (1); A control unit, which makes a judgment based on the continuous generation information of the electric arc, and when it is detected that the number of times the electric arc is generated is greater than or equal to two times, controls the scraping device to scrape off the oxidized deposits at the contact point between the moving contact (3) and the stationary contact (2), so that the moving contact (3) and the stationary contact (2) are closed; The scraping device comprises: A first pushing component (4), the first pushing component (4) being fixedly connected to the inner wall of the shell (1); A U-shaped seat (5) slidably disposed on the top of the first pushing component (4); A second pushing assembly (6) fixedly connected to a side wall of the housing (1); The first pushing assembly (4) is used to vertically adjust the distance between the U-shaped seat (5) and the top of the moving contact (3), and the second pushing assembly (6) is used to horizontally push the U-shaped seat (5) to move along the surface of the moving contact (3); A fixed seat (7) is fixedly connected between two side walls of the U-shaped seat (5), and the fixed seat (7) is arranged to be inclined, and the inclination angle of the fixed seat (7) is consistent with the inclination angle after the moving contact (3) and the static contact (2) are disconnected; A triangular scraper (8) fixedly connected to the side wall of the fixing seat (7) and used for scraping off the oxide layer on the surface of the moving contact (3); Also includes: A cavity (31) is formed inside the fixing seat (7); Two L-shaped sliding blocks (9) are provided and are symmetrically slidably connected to the inside of the cavity (31) and are used to push and collect the oxidized deposits on the top of the triangular scraper (8); A linear drive assembly, disposed inside the U-shaped seat (5), and used to push the two L-shaped slide blocks (9) to slide along the side walls of the fixed seat (7); The collecting block (10) is provided with two ends of the L-shaped sliding block (9) which are arranged at corresponding positions via a vibration assembly; The collecting components are arranged on both sides of the collecting block (10) and are used to push and collect the oxidized deposits scraped off by the triangular scraper (8).

2. The intelligent protection type miniature circuit breaker according to claim 1, characterized in that: The linear drive assembly comprises: A driving motor (11) is fixedly connected to the side wall of the U-shaped seat (5) via a mounting plate; A bidirectional threaded rod (12), one end of which is fixedly connected to the output shaft end of the drive motor (11), and the other end of which is rotatably connected to the side wall of the U-shaped seat (5); Two connecting frames (13) are provided and are respectively threadedly connected to different threaded portions of the bidirectional threaded rod (12); Two L-shaped plates (14) are provided and are respectively fixedly connected to the bottom ends of the two connecting frames (13), and the L-shaped plates (14) are slidably connected to the L-shaped sliding blocks; Four shielding plates (15) are provided, two of which form a group, and the two shielding plates (15) in the same group are fixedly connected to the side wall of the L-shaped plate (14) and are located inside the cavity (31); A sliding column (16) is fixedly connected to a side of the L-shaped sliding block (9) close to the cavity (31), and one end of the sliding column (16) extends into the interior of the cavity (31); An elastic member (17) is located between the two shielding plates (15) and is fixedly connected between the sliding column (16) and the L-shaped plate (14); A slide plate (36) is fixedly connected to the end of the slide column (16), and the slide plate (36) is slidably connected to the cavity (31).

3. The intelligent protection type miniature circuit breaker according to claim 1, characterized in that: The collection component comprises: Two shovel blocks (18) are provided and are symmetrically fixedly connected to the two side walls of the collecting block (10) and are used to scrape and clean the oxide layer on the travel path; A collecting chamber (19) is provided at the top of the shovel block (18) and is used to collect the oxidized deposits removed by the shovel block (18) to prevent the oxidized deposits from adhering to the surface of the moving contact (3) again.

4. The intelligent protection type miniature circuit breaker according to claim 1, characterized in that: Also includes: A through groove (20) is provided on the top of the collecting block (10); A grinding stone (21) is slidably connected to the inside of the through groove (20) and is used to grind the scraped surface of the moving contact (3); The limit assembly is used to limit the moving track of the grinding sandstone (21) so that the grinding sandstone (21) can only move downward.

5. The intelligent protection type miniature circuit breaker according to claim 1, characterized in that: Also includes: A top block (22) fixedly connected to the top of the fixing seat (7); A plurality of interception blocks (23) are provided and fixed on the side wall of the top block (22) in a linear array; A support column (24) fixedly connected to the top of the L-shaped slide block (9); The interception block (23) is provided with a clearance opening (25), and the interception block (23) is made of a material with a certain degree of flexibility.

6. The intelligent protection type miniature circuit breaker according to claim 5, characterized in that: The reciprocating component comprises: Two fixed clamping seats (26) are provided and are symmetrically fixedly connected to the ends of the L-shaped sliding block (9); A support rod (27) is fixedly connected between the two fixed clamping seats (26), and the collecting block (10) is slidably connected to the support rod (27); Wherein, torsion springs (28) are fixedly connected between the two fixed clamping seats (26) and the two side walls of the collecting block (10), and the two torsion springs (28) are symmetrically sleeved on the outer wall of the support rod (27).

7. The intelligent protection type miniature circuit breaker according to claim 6, characterized in that: The electromagnetic switch assembly includes: A central lever (29) rotatably disposed inside the housing (1), wherein the left end of the central lever (29) is located above the moving contact (3); An operating handle (30) rotatably disposed inside the housing (1) and extending through the housing (1) to the outside; When the current exceeds a specified value, the electromagnetic switch component will push the moving contact (3) to separate from the static contact (2) to achieve automatic power off.

8. The intelligent protection type miniature circuit breaker according to claim 4, characterized in that: The limiting component comprises: A swivel seat (32) fixedly connected to the inner wall of the through groove (20); The roller (33) is unidirectionally rotatably connected to the rotating seat (32).

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