An internet of things intelligent electric power protection device

Abstract

The present application relates to a kind of electric power protection devices, in particular to a kind of internet of things intelligent electric power protection equipment.A kind of internet of things intelligent electric power protection equipment includes circuit breaker, and the circuit breaker includes shell, handle, arc extinguishing grid piece group, centrifugal impeller and transmission device.Hollow passage is communicated with outside in the inside of arc extinguishing grid piece group set in arc extinguishing chamber is arranged.The centrifugal impeller is arranged in hollow passage, and both ends are rotatably installed in shell, for when rotating, the air flow of outside is guided to arc extinguishing chamber.Transmission device is connected rotation axis and centrifugal impeller, to when switching off, the rotation movement generated by handle is transmitted to centrifugal impeller, makes centrifugal impeller rotate, and air flow is guided to arc extinguishing chamber by hollow passage, makes arc extinguishing chamber fast pressure relief, avoid its risk easily caused by not timely pressure relief.

Description

Technical Field

[0001] This invention relates to a power protection device, and more particularly to an Internet of Things (IoT) smart power protection device. Background Technology

[0002] The Internet of Things (IoT) intelligent power protection equipment is a new type of power protection device that integrates relay protection technology, mechanical transmission optimization, and IoT remote monitoring. It is mainly used in power distribution systems, substations, and industrial power equipment to achieve rapid detection, tripping protection, and intelligent management of circuit faults. As a key protection device in the power system, its core function is to quickly disconnect the circuit when faults such as short circuits and overloads are detected, ensuring the safe and stable operation of the power grid. The core component of this equipment, the circuit breaker, typically consists of a contact system, an arc-extinguishing device, and an operating mechanism. The contact system includes: main contacts, made of copper plated with silver or silver alloy (such as AgW), used to carry the rated current and have low contact resistance characteristics; arc contacts, made of tungsten copper alloy or other arc-resistant materials, which preferentially contact / separate during circuit breaking, attracting and bearing the arc; and contact springs, providing a constant contact pressure of ≥200N to ensure reliable contact and prevent overheating from incomplete connections.

[0003] When the equipment detects an overload fault, its working principle is as follows: the main contacts and the arc contacts disconnect sequentially, and the current is transferred to the arc contacts; a high-temperature arc is generated when the arc contacts separate; the arc extinguishing device cuts and cools the arc to achieve rapid arc extinguishing. During this process, the instantaneous release of arc energy will cause the pressure in the arc extinguishing chamber to rise sharply (up to several MPa). If the pressure is not released in time, it may cause: mechanical damage such as shell rupture; delayed medium recovery; and the risk of secondary arcing.

[0004] Traditional circuit breakers typically employ mechanical or electronic tripping mechanisms to achieve opening operations. For example, the invention patent with authorization announcement number CN109148229B provides a smart circuit breaker solution, but it still has the following technical limitations: it uses traditional metal grid arc extinguishing technology, which limits the arc extinguishing speed (typically 15-20ms); the pressure relief mechanism relies on the pressure difference generated by the heating and expansion of gas in the arc extinguishing chamber, resulting in a response lag; and untimely pressure relief can easily lead to the risk of arc reignition. Summary of the Invention

[0005] Therefore, it is necessary to provide a new type of IoT smart power protection device to address the problems existing in current IoT smart power protection devices. This new device should at least solve the problem that the circuit breaker of the existing IoT smart power protection device is not depressurized in time, which can easily lead to risks.

[0006] The above objectives are achieved through the following technical solutions:

[0007] An IoT-based smart power protection device includes a circuit breaker, comprising: a housing, a handle, an arc-extinguishing grid assembly, a centrifugal impeller, and a transmission device. An arc-extinguishing chamber is disposed on the housing. The handle is rotatably mounted to the housing via a rotating shaft. The arc-extinguishing grid assembly is disposed within the arc-extinguishing chamber, and its interior has a hollow channel communicating with the outside. The centrifugal impeller is disposed within the hollow channel and rotatably mounted to the housing at both ends, used to guide external airflow into the arc-extinguishing chamber during rotation. The transmission device connects the rotating shaft and the centrifugal impeller to transmit the rotational motion generated by the handle to the centrifugal impeller during opening, causing the centrifugal impeller to rotate.

[0008] Furthermore, insulating supports are provided at both ends of the arc-extinguishing grid assembly, and the arc-extinguishing grid assembly is rotatably installed in the arc-extinguishing chamber through the two insulating supports.

[0009] Furthermore, the arc-extinguishing grid assembly includes multiple arc-extinguishing grids and a fixing structure that fixes the multiple arc-extinguishing grids together. The hollow channel is located in the middle of each arc-extinguishing grid. The centrifugal impeller includes a drive rod and blades. The drive rod is coaxial with the hollow channel. One end of the drive rod is provided with an air inlet. An air inlet channel communicating with the air inlet is provided inside. An air outlet communicating with the hollow channel is provided on the side wall of the air inlet channel. The blades are arranged circumferentially around the drive rod.

[0010] Furthermore, the transmission device includes a bevel gear pair, a cylindrical gear pair, and a connecting shaft; the bevel gear pair includes a meshing driving bevel gear and a driven bevel gear, and the cylindrical gear pair includes a meshing main drive gear and a driven drive gear; the connecting shaft is rotatably mounted on the housing, and the driven bevel gear and the main drive gear are respectively mounted on both ends of the connecting shaft; the driving bevel gear is coaxially arranged with the rotating shaft and rotatably mounted on the housing; the driven drive gear is mounted on the other end of the transmission rod; when the brake is opened, the rotational motion generated by the handle is transmitted to the driving bevel gear.

[0011] Furthermore, a through hole is provided in the middle of the driving bevel gear; one end of the rotating shaft extends out of the housing, and the rotating shaft is coaxially and fixedly connected to the driving bevel gear through the through hole.

[0012] Furthermore, a mesh screen is installed at the air inlet.

[0013] Furthermore, the circuit breaker also includes a sealing cover, which is fixedly installed on the housing and covers the outside of the arc-extinguishing grid assembly and the transmission device.

[0014] Furthermore, a dial ring is installed at one end of the arc-extinguishing grid assembly. The dial ring is located outside the sealing cover, and the dial ring and the sealing cover are marked with marks for identifying the position of the arc-extinguishing grid assembly.

[0015] Furthermore, the circuit breaker also includes multiple scrapers, which are installed inside the sealing cover. Each scraper is positioned between two adjacent arc-extinguishing grids, and both sides of each scraper are in contact with the arc-extinguishing grids.

[0016] Furthermore, the scraper extends from the outer end of the arc-extinguishing grid to the inner end of the arc-extinguishing grid along the radial and circumferential directions.

[0017] The beneficial effects of this invention are:

[0018] This invention, through the structural design of the arc-extinguishing grid assembly, guides, divides, and cools the electric arc, significantly improving arc-extinguishing efficiency. By combining the handle with the hollow channel and centrifugal impeller inside the arc-extinguishing grid assembly, the rotation of the handle is transmitted to the centrifugal impeller during circuit breaking. The rotating impeller guides airflow through the hollow channel to the arc-extinguishing chamber, allowing for rapid depressurization and avoiding the risks associated with delayed depressurization. Furthermore, the airflow blowing towards the arc through the hollow channel carries away its heat, lowering its temperature and accelerating its movement, leading to faster extinguishing. Rapid arc extinguishing reduces arc erosion of contacts and internal components, extending equipment lifespan and lowering maintenance costs. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of a circuit breaker in an embodiment of the Internet of Things (IoT) smart power protection device provided by the present invention;

[0020] Figure 2 A schematic diagram of the overall structure of a circuit breaker in an IoT smart power protection device provided in another embodiment of the present invention (excluding the sealing cover).

[0021] Figure 3 for Figure 2 Exploded view;

[0022] Figure 4 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure 5 A first partial cross-sectional view of a circuit breaker in an embodiment of the Internet of Things (IoT) smart power protection device provided by the present invention;

[0024] Figure 6 An internal view of a circuit breaker in an IoT smart power protection device according to an embodiment of the present invention;

[0025] Figure 7 A second partial sectional view of a circuit breaker in an embodiment of the Internet of Things (IoT) smart power protection device provided by the present invention;

[0026] Figure 8 This is a schematic diagram of the arc-extinguishing grid of a circuit breaker in an IoT smart power protection device according to an embodiment of the present invention;

[0027] Figure 9This is a schematic diagram of the arc-extinguishing grid plate of the circuit breaker in an embodiment of the Internet of Things smart power protection device provided by the present invention, from another perspective.

[0028] In the picture:

[0029] 100. Circuit breaker; 101. Handle; 1011. Driving bevel gear; 1012. Rotating shaft; 1016. Driven bevel gear; 1017. Main drive gear; 1018. Driven gear; 1019. Support base; 1020. Connecting shaft; 102. Housing; 103. Sealing cover; 104. Scraper; 200. Centrifugal impeller; 201. Blade; 202. Drive rod; 2021. Mesh; 2022. Air inlet; 300. Arc extinguishing grid assembly; 301. Insulating support; 302. Fixing structure; 303. Arc extinguishing grid; 3031. Notch; 3032. Top block; 304. Toggle ring; 400. Main contact; 500. Arc contact. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0031] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] This invention proposes an IoT-based intelligent power protection device, such as... Figure 1 As shown, a circuit breaker 100 is included, which is an improvement on an existing circuit breaker, has the common structure of existing relays, and performs the making, carrying, and breaking current functions of a conventional circuit breaker, including but not limited to common contact systems and operating mechanisms. Furthermore, as... Figures 2 to 7 As shown, it also includes a housing 102, a handle 101, an arc-extinguishing grid assembly 300, a centrifugal impeller 200, and a transmission device. An arc-extinguishing chamber is provided on the housing 102. The handle 101 is rotatably mounted on the housing 102 via a rotating shaft 1012. The handle 101 is used to manually operate the circuit breaker 100. When the circuit breaker 100 triggers a tripping signal, the energy storage mechanism (such as a tripping spring) in the operating mechanism releases energy, driving the handle 101 to rotate through a linkage, gear, or cam mechanism. The rotation of the handle 101 is synchronized with the tripping state of the circuit breaker 100. The arc-extinguishing grid assembly 300 is disposed in the arc-extinguishing chamber and is used to guide, divide, and cool the arc, thereby achieving rapid and reliable arc extinguishing. The arc-extinguishing grid assembly 300 has a hollow channel communicating with the outside. The centrifugal impeller 200 is housed in a hollow channel and rotatably mounted on the housing 102 at both ends via bearings. It guides external airflow into the arc-extinguishing chamber during rotation, accelerating the depressurization of the chamber. A transmission device connects the rotating shaft 1012 and the centrifugal impeller 200, transmitting the rotational motion generated by the handle 101 to the impeller 200 during circuit breaking, causing the impeller 200 to rotate. The rotation of the impeller 200 guides the airflow drawn in from the outside into the arc-extinguishing chamber, enabling rapid depressurization and preventing risks such as arc reignition or housing 102 rupture due to delayed depressurization.

[0034] In addition, the IoT smart power protection equipment also includes a smart terminal (not shown in the figure) for realizing intelligent control and communication functions of the circuit breaker 100. The handle 101 can transmit equipment status data to the control center or mobile device through a built-in communication module (such as Bluetooth, Wi-Fi, etc.) to achieve remote monitoring and management. Operators can view the equipment status and perform remote operation anytime and anywhere through mobile phones or computers.

[0035] Compared with existing technologies, this invention significantly improves arc extinguishing efficiency by guiding, dividing, and cooling the electric arc through the structural design of the arc-extinguishing grid assembly 300. By combining the handle 101 with the hollow channel inside the arc-extinguishing grid assembly 300 and the centrifugal impeller 200, the rotation of the handle 101 is transmitted to the centrifugal impeller 200 during circuit breaking, causing the impeller 200 to rotate and guide airflow through the hollow channel to the arc-extinguishing chamber. This allows for rapid depressurization of the arc-extinguishing chamber, preventing risks caused by untimely depressurization. Furthermore, the airflow blowing towards the arc through the hollow channel also carries away the arc's heat, lowering its temperature and accelerating its movement, thus extinguishing it more quickly. Rapid arc extinguishing reduces arc erosion of contacts and internal components, extending equipment lifespan and reducing maintenance costs.

[0036] Because the electric arc contacts the arc-extinguishing grid sequentially, and the energy density of the arc decreases as it approaches the later stage, uneven damage occurs to the arc-extinguishing grid. Specifically, in this embodiment, when the device suddenly trips, the arc travels along... Figure 6 The arc enters the arc-extinguishing chamber in the direction indicated by the middle arrow and is extinguished by segmentation. During this process, the energy of the arc decreases as it moves upwards, meaning the damage to the arc-extinguishing grid gradually decreases from bottom to top. In some embodiments, such as Figure 3 As shown, the arc-extinguishing grid assembly 300 of this application is provided with insulating support members 301 (such as polytetrafluoroethylene (PTFE), ceramic or special plastic) at both ends. The arc-extinguishing grid assembly 300 is rotatably installed in the arc-extinguishing chamber through the two insulating support members 301, so as to allow adjustment of the arc-extinguishing part of the arc-extinguishing grid assembly 300, avoid concentrated ablation at fixed positions, and increase the life of the arc-extinguishing grid assembly 300 by more than 3 times.

[0037] In some embodiments, such as Figure 3 As shown, the arc-extinguishing grid assembly 300 includes multiple arc-extinguishing grids 303 and a fixing structure 302 (such as a connecting rod) that fixes the multiple arc-extinguishing grids 303 together. The arc-extinguishing grids 303 are circular and have notches 3031 (such as...). Figure 8 (As shown). Multiple arc-extinguishing grid plates 303 are arranged in parallel. Each arc-extinguishing grid plate 303 has a top block 3032 on both sides. The top block 3032 is fitted onto the fixed structure 302 and is made of insulating material to maintain a certain gap with the adjacent arc-extinguishing grid plate 303 for arc segmentation. The fixed structure 302 can be a high-strength insulating frame to ensure the stability of the arc-extinguishing grid plate assembly 300. Hollow channels are located in the middle of each arc-extinguishing grid plate 303. These hollow channels are interconnected to form a complete airflow channel for guiding and accelerating airflow to further cool the arc. Figure 3 and Figure 7As shown, the centrifugal impeller 200 includes a drive rod 202 and blades 201. The drive rod 202 is coaxial with the hollow channel, and its two ends are rotatably mounted on the housing 102 via bearings. One end of the drive rod 202 is provided with an air inlet 2022, and an air inlet channel communicating with the air inlet 2022 is provided inside. An exhaust port communicating with the hollow channel is provided on the side wall of the air inlet channel. The blades 201 are arranged circumferentially around the drive rod 202. Specifically, the blades 201 adopt a vortex-type oblique cut design. When the impeller rotates, it uses centrifugal force to draw air in from the air inlet channel and discharge it outward through the exhaust port, forming a strong airflow. This airflow passes through the hollow channel of the arc-extinguishing grid assembly 300, directly acting on the electric arc, accelerating the cooling and extinguishing of the electric arc, and quickly expelling the metal vapor generated by contact erosion from the arc-extinguishing chamber, accelerating the pressure relief efficiency and reducing the probability of arc reignition. Furthermore, as... Figure 9 As shown, a mesh 2021 is installed at the air inlet 2022 to filter impurities in the air. The two ends of the blade 201 are fixedly connected to the drive rod 202 via a hub.

[0038] In some embodiments, such as Figures 2 to 4 As shown, the transmission device includes a bevel gear pair, a cylindrical gear pair, and a connecting shaft 1020. The bevel gear pair is designed to change the direction of rotational motion, thus adapting to the internal spatial layout of the equipment. The cylindrical gear pair is designed to further transmit and adjust the rotational speed. Specifically, the bevel gear pair includes a meshing driving bevel gear 1011 and a driven bevel gear 1016, and the cylindrical gear pair includes a meshing main drive gear 1017 and a driven drive gear 1018. The connecting shaft 1020 is rotatably mounted on the housing 102, and the driven bevel gear 1016 and the main drive gear 1017 are respectively mounted at both ends of the connecting shaft 1020. Specifically, a support base 1019 is mounted on the housing 102, and the connecting shaft 1020 is rotatably mounted on the support base 1019 via a bearing assembly. The driving bevel gear 1011 is coaxially fixed with the rotating shaft 1012 and rotatably mounted on the housing 102. The driven drive gear 1018 is mounted on one end of the transmission rod 202. When the circuit breaker is opened, the rotational motion generated by the handle 101 is transmitted to the drive bevel gear 1011 via the rotating shaft 1012. Through the combination of bevel gear pair and cylindrical gear pair, the transmission device can efficiently transmit the rotational motion of the handle 101 to the centrifugal impeller 200, ensuring the stability and reliability of power transmission, and can work normally even under high load.

[0039] In some embodiments, such as Figure 1 , Figure 5 and Figure 9As shown, the circuit breaker 100 also includes a sealing cover 103, which is fixedly installed on the housing 102. The sealing cover 103 covers the outside of the arc-extinguishing grid assembly 300 and the transmission device. It is usually made of high-strength insulating material, such as insulating plastic or ceramic, to confine the arc extinguishing process to a specific area, prevent the arc from being ejected, and protect other components inside the equipment and the safety of the operators.

[0040] In some embodiments, such as Figure 9 As shown, a dial ring 304 is installed at one end of the arc-extinguishing grid assembly 300. The dial ring 304 is located outside the sealing cover 103, facilitating manual operation by the operator. The dial ring 304 is used to manually adjust the position of the arc-extinguishing grid assembly 300, allowing it to be rotated or adjusted at an angle as needed without opening the sealing cover 103. The dial ring 304 is typically made of high-strength insulating material to ensure operator safety upon contact. Markings for identifying the position of the arc-extinguishing grid assembly 300 are provided on the dial ring 304 and the sealing cover 103. These markings can be scale lines, color codes, or other visual identifiers. These markings help the operator quickly identify the current position of the arc-extinguishing grid assembly 300, ensuring that the arc-extinguishing grid assembly 300 can be adjusted at the correct angle and direction, improving the accuracy and efficiency of operation. Furthermore, the circuit breaker 100 is also equipped with LEDs or neon lights to display the circuit breaker 100's open / closed status and the number of times it has been opened (e.g., green = closed, red = open; yellow = opened more than 3 times).

[0041] Because the arc-extinguishing chamber requires pressure relief, it is typically not sealed to the outside environment. Dust can enter the chamber and come into contact with the arc-extinguishing grid 303, preventing the arc from being effectively divided and cooled. Furthermore, dust accumulation can form a localized insulating layer on the surface of the arc-extinguishing grid, affecting its conductivity and heat dissipation performance, reducing arc-extinguishing efficiency, and potentially even preventing the arc from being extinguished in time, leading to safety hazards. Therefore, in some embodiments, such as... Figure 3 and Figure 5As shown, the circuit breaker 100 also includes multiple scrapers 104, which are mounted on the sealing cover 103. Each scraper 104 is positioned between two adjacent arc-extinguishing grid plates 303, and both sides of each scraper 104 are in contact with the arc-extinguishing grid plates 303. The shape and size of the scraper 104 can be designed according to the spacing and size of the arc-extinguishing grid plates 303 to ensure that it can fit tightly against the arc-extinguishing grid plates 303 and effectively scrape the arc-extinguishing grid plates 303 on both sides. In addition, by contacting the arc-extinguishing grid plates 303, the scraper 104 can further divide the arc, increase the total resistance of the arc, reduce the arc current, and thus accelerate the extinction of the arc. Specifically, brushes can be bonded to both sides of the scraper 104 to further enhance the cleaning effect. The brushes can be made of high-temperature resistant insulating fibers (such as ceramic fibers) to avoid interfering with the arc path. The brushes are set to be in close contact with the arc-extinguishing grid 303 to effectively remove carbon deposits and impurities, reduce arc erosion, and extend the service life of the arc-extinguishing grid 303.

[0042] In some embodiments, such as Figure 3 and Figure 5 As shown, the scraper 104 is mounted on the bottom of the sealing cover 103 and extends from the outer end to the inner end of the arc-extinguishing grid 303 along the radial and circumferential directions of the arc-extinguishing grid 303. This ensures that the scraper 104 can cover the entire side of the arc-extinguishing grid 303 when the arc-extinguishing grid assembly 300 rotates, and concentrates the scraped dust at the bottom of the sealing cover 103. Specifically, a collection groove is provided at the bottom of the sealing cover 103, and a removable baffle is provided at the bottom of the collection groove for easy cleaning of the collected dust.

[0043] The working principle and process of one embodiment of the present invention are as follows:

[0044] When the IoT smart power protection device experiences an overload, it will disconnect the main contact 400 and the arc contact 500, transferring current to the arc contact 500. The arc contact 500 then separates, generating an electric arc. The generated arc will travel along... Figure 6 The arc enters the arc-extinguishing grid assembly 300 in the direction indicated by the middle arrow, is cut into multiple small arc segments, and is eventually extinguished. During this process, the handle 101 will trip under the action of the energy storage mechanism (not shown in the figure), generating a downward rotation. This rotation is transmitted to the driving bevel gear 1011 through the rotating shaft 1012, causing the driving bevel gear 1011 to rotate. The rotation of the driving bevel gear 1011 drives the driven bevel gear 1016 to rotate, and finally drives the centrifugal impeller 200 to rotate through the connecting shaft 1020, the main drive gear 1017, and the driven drive gear 1018. The rotation of the centrifugal impeller 200 will draw airflow from the air inlet 2022 into the air inlet channel and through the exhaust port along... Figure 7The arrow points outwards, entering the arc-extinguishing chamber and acting on the arc to improve pressure relief efficiency and increase the arc's movement speed. After more than three trips, the yellow indicator light flashes, reminding the operator to rotate the dial ring 304 (rotation direction, for example...). Figure 5 The arrow on the arc-extinguishing grid plate 303 points in the direction of rotation, causing the entire arc-extinguishing grid plate assembly 300 to rotate at a certain angle, thereby switching the arc-extinguishing surface of the arc-extinguishing grid plate 303. During the switching process, the scraper 104 can scrape off the dust on the arc-extinguishing grid plate 303 and deposit it at the bottom of the sealing cover 103. In addition, the scraper 104 can also guide the airflow direction, facilitating the rapid ejection of airflow.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. An Internet of Things smart power protection device, characterized in that, include: Circuit breakers, circuit breakers include: The casing has an arc-extinguishing chamber. The handle is rotatably mounted on the housing via a rotating shaft; when the circuit breaker triggers the tripping signal of the main contacts and arc contacts, the energy storage mechanism in the operating mechanism releases energy to drive the handle to rotate. The arc extinguishing grid assembly is located in the arc extinguishing chamber and above the main contact and the arc contact. The arc extinguishing grid assembly has a hollow channel inside that communicates with the outside. A centrifugal impeller, disposed within a hollow channel and rotatably mounted to the housing at both ends via bearings, guides external airflow into the arc-extinguishing chamber during rotation; and The transmission device connects the rotating shaft and the centrifugal impeller to transmit the rotational motion generated by the handle to the centrifugal impeller when the switch is opened, so that the centrifugal impeller rotates. The arc-extinguishing grid assembly includes multiple arc-extinguishing grids and a fixed structure that connects the multiple arc-extinguishing grids. The hollow channel is located in the middle of each arc-extinguishing grid. The centrifugal impeller includes a drive rod and blades. The drive rod is coaxial with the hollow channel. One end of the drive rod is provided with an air inlet, and an air inlet channel communicating with the air inlet is provided inside. An air outlet communicating with the hollow channel is provided on the side wall of the air inlet channel. The blades are arranged circumferentially around the drive rod. The arc-extinguishing grids are circular with notches. Multiple arc-extinguishing grids are arranged in parallel. Each arc-extinguishing grid has a top block on both sides. The top blocks are fitted onto the fixed structure to create a certain gap between adjacent arc-extinguishing grids for dividing the electric arc. The circuit breaker also includes a sealing cover and multiple scrapers. The sealing cover is fixedly installed on the housing and covers the outside of the arc-extinguishing grid plate assembly and the transmission device. The scrapers are installed inside the sealing cover, with each scraper positioned between two adjacent arc-extinguishing grid plates, and each scraper's sides contacting the arc-extinguishing grid plate. The scrapers extend from the outer end of the arc-extinguishing grid plate to the inner end of the arc-extinguishing grid plate along the radial and circumferential directions of the arc-extinguishing grid plate. Insulating supports are provided at both ends of the arc-extinguishing grid assembly, and the arc-extinguishing grid assembly is rotatably installed in the arc-extinguishing chamber through the two insulating supports; a dial ring is installed at one end of the arc-extinguishing grid assembly, the dial ring is located outside the sealing cover, and the dial ring and the sealing cover are marked for identifying the position of the arc-extinguishing grid assembly. The dial ring is used to manually adjust the position of the arc-extinguishing grid assembly. The transmission device includes a bevel gear pair, a cylindrical gear pair, and a connecting shaft; the bevel gear pair includes a meshing driving bevel gear and a driven bevel gear, and the cylindrical gear pair includes a meshing main drive gear and a driven drive gear; the connecting shaft is rotatably mounted on the housing, and the driven bevel gear and the main drive gear are respectively mounted on both ends of the connecting shaft; the driving bevel gear is coaxially arranged with the rotating shaft and rotatably mounted on the housing; the driven drive gear is mounted on the other end of the transmission rod; the rotational motion generated by the handle when the brake is opened can be transmitted to the driving bevel gear.

2. The IoT smart electrical protection device of claim 1, wherein, The driving bevel gear has a through hole in the middle; one end of the rotating shaft extends out of the housing, and the rotating shaft is coaxially and fixedly connected to the driving bevel gear through the through hole.

3. The IoT smart electrical protection device of claim 2, wherein, A mesh screen is installed at the air inlet.

Images