Internet of Things intelligent power protection equipment

Abstract

The invention relates to an electric power protection device, in particular to intelligent electric power protection equipment based on the Internet of Things. The invention discloses intelligent power protection equipment based on Internet of Things. The intelligent power protection equipment comprises a circuit breaker, wherein the circuit breaker comprises a shell, a handle, an arc extinguishing grid group, a centrifugal impeller and a transmission device. The shell is provided with an arc extinguish chamber. The handle is rotatably mounted to the housing through a rotating shaft. The arc extinguishing grid sheet group is arranged in the arc extinguishing chamber, and a hollow channel communicated with the outside is arranged in the arc extinguishing grid sheet group. The centrifugal impeller is arranged in the hollow channel, two ends of the centrifugal impeller are rotatably installed on the shell, and the centrifugal impeller is used for guiding external airflow to the arc extinguish chamber during rotation. And the transmission device is connected with the rotating shaft and the centrifugal impeller, so that the rotating motion generated by the handle is transmitted to the centrifugal impeller during opening, the centrifugal impeller rotates, airflow is guided to the arc extinguish chamber through the hollow channel, the arc extinguish chamber is subjected to quick pressure relief, and the risk easily caused by untimely pressure relief of the arc extinguish chamber is avoided.

Description

Technical Field

[0001] The present invention relates to an electric power protection device, and particularly to an Internet of Things (IoT) intelligent electric power protection device. Background Art

[0002] The IoT intelligent electric power protection device is a new type of electric power protection device that integrates relay protection technology, mechanical drive optimization, and IoT remote monitoring. It is mainly used in distribution systems, substations, and industrial electric power equipment to achieve rapid detection of circuit faults, circuit breaker protection, and intelligent management. As a key protection device in the power system, its core function is to quickly cut off the circuit when detecting faults such as short circuits and overloads to ensure the safe and stable operation of the power grid. The core component of this device, the circuit breaker, usually consists of a contact system, an arc extinguishing device, and an operating mechanism. The contact system includes: main contacts, made of copper-plated silver or silver alloy (such as AgW) materials, used to carry the rated current and having the characteristic of low contact resistance; arcing contacts, made of tungsten-copper alloy and other materials resistant to arc ablation, which contact / separate first when breaking the circuit, attract and withstand the arc; contact springs, providing a constant contact pressure of ≥200N to ensure reliable contact and prevent false contact and heating.

[0003] When the device detects an overload fault, its working principle is as follows: the main contacts and arcing contacts disconnect in sequence, and the current transfers to the arcing contacts; when the arcing contacts separate, a high-temperature arc is generated; the arc extinguishing device cuts and cools the arc to achieve rapid arc extinction. During this process, the instantaneous release of arc energy will cause the pressure in the arc extinguishing chamber to rise rapidly (up to several MPa). If the pressure relief is not timely, it may cause: mechanical damage such as shell bursting; delay in dielectric recovery; risk of secondary arc.

[0004] Traditional circuit breakers usually use mechanical or electronic tripping mechanisms to achieve the opening operation. For example, the invention patent with the authorized announcement number CN109148229B provides a smart circuit breaker solution, but it still has the following technical limitations: using the traditional metal grid arc extinguishing technology, the arc extinguishing speed is limited (typical value 15 - 20ms); the pressure relief mechanism relies on the pressure difference generated by the heating and expansion of the gas in the arc extinguishing chamber, resulting in a response lag problem; untimely pressure relief is likely to lead to the risk of arc reignition. Summary of the Invention

[0005] Based on this, it is necessary to provide a new type of IoT intelligent electric power protection device for the problems existing in the current IoT intelligent electric power protection device, which can at least solve the problem that the pressure relief of the circuit breaker in the existing IoT intelligent electric power protection device is not timely and easily causes risks.

[0006] The above object is achieved by the following technical solutions: An Internet of Things intelligent power protection device includes a circuit breaker, and the circuit breaker includes: a housing, a handle, an arc extinguishing grid group, a centrifugal impeller, and a transmission device. An arc extinguishing chamber is provided on the housing. The handle is rotatably mounted on the housing through a rotating shaft. The arc extinguishing grid group is arranged in the arc extinguishing chamber, and a hollow channel communicating with the outside is provided inside the arc extinguishing grid group. The centrifugal impeller is arranged in the hollow channel, and both ends are rotatably mounted on the housing for guiding the outside air flow to the arc extinguishing chamber when rotating. The transmission device connects the rotating shaft and the centrifugal impeller to transmit the rotational motion generated by the handle during opening to the centrifugal impeller to make the centrifugal impeller rotate.

[0007] Further, insulating supports are provided at both ends of the arc extinguishing grid group, and the arc extinguishing grid group is rotatably mounted in the arc extinguishing chamber through the two insulating supports.

[0008] Further, the arc extinguishing grid group includes a plurality of arc extinguishing grids and a fixing structure fixedly connecting the plurality of arc extinguishing grids, and the hollow channel is in the middle of each arc extinguishing grid; the centrifugal impeller includes a transmission rod and blades, the transmission rod is coaxial with the hollow channel, an air inlet is provided at one end of the transmission rod, an air inlet channel communicating with the air inlet is provided inside, and 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 transmission rod.

[0009] Further, the transmission device includes a bevel gear pair, a cylindrical gear pair, and a connecting shaft; the bevel gear pair includes a driving bevel gear and a driven bevel gear that mesh with each other, and the cylindrical gear pair includes a main transmission gear and a driven transmission gear that mesh with each other; the connecting shaft is rotatably mounted on the housing, and the driven bevel gear and the main transmission gear are respectively mounted at both ends of the connecting shaft; the driving bevel gear is coaxially arranged with the rotating shaft and is rotatably mounted on the housing; the driven transmission gear is mounted at the other end of the transmission rod; the rotational motion generated by the handle during opening is transmitted to the driving bevel gear.

[0010] Further, 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 fixedly connected to the driving bevel gear through the through hole.

[0011] Further, a mesh is provided at the air inlet.

[0012] Further, the circuit breaker further includes a sealing cover, the sealing cover is fixedly mounted on the housing, and the sealing cover covers the outside of the arc extinguishing grid group and the transmission device.

[0013] Further, a dial ring is mounted at one end of the arc extinguishing grid group, the dial ring is outside the sealing cover, and marks for identifying the position of the arc extinguishing grid group are provided on the dial ring and the sealing cover.

[0014] Further, the circuit breaker further includes a plurality of scraping blades, the scraping blades are mounted inside the sealing cover, each scraping blade is arranged between two adjacent arc extinguishing grids, and both sides of each scraping blade are in contact with the arc extinguishing grids.

[0015] Further, the scraping blade extends from the outer end to the inner end of the arc extinguishing grid along the radial and circumferential directions of the arc extinguishing grid.

[0016] The beneficial effects of the present invention are as follows: Through the structural design of the arc extinguishing grid group of the present invention, the electric arc is guided, divided and cooled, significantly improving the arc extinguishing efficiency. By combining the handle with the hollow channel and the centrifugal impeller inside the arc extinguishing grid group, when a circuit breaker occurs, the rotation of the handle is transmitted to the centrifugal impeller, and the centrifugal impeller rotates to direct the air flow through the hollow channel to the arc extinguishing chamber, quickly relieving the pressure in the arc extinguishing chamber and avoiding the risk that is likely to be caused by untimely pressure relief. In addition, the air flow blows towards the electric arc through the hollow channel, taking away the heat of the electric arc, reducing the temperature of the electric arc, accelerating the moving speed of the electric arc, and making it extinguish faster. The quick arc extinguishing reduces the ablation of the electric arc on the contacts and the internal parts of the equipment, prolongs the service life of the equipment, and reduces the maintenance cost. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of the circuit breaker of the Internet of Things intelligent power protection device provided by an embodiment of the present invention; Figure 2 It is a schematic diagram of the overall structure of the circuit breaker of the Internet of Things intelligent power protection device provided by another embodiment of the present invention (excluding the sealing cover); Figure 3 It is Figure 2 exploded view; Figure 4 It is Figure 2 enlarged view at A in Figure 5 It is the first partial cross-sectional view of the circuit breaker of the Internet of Things intelligent power protection device provided by an embodiment of the present invention; Figure 6 It is the internal view of the circuit breaker of the Internet of Things intelligent power protection device provided by an embodiment of the present invention; Figure 7 It is the second partial cross-sectional view of the circuit breaker of the Internet of Things intelligent power protection device provided by an embodiment of the present invention; Figure 8 It is the schematic diagram of the structure of the arc extinguishing grid of the circuit breaker of the Internet of Things intelligent power protection device provided by an embodiment of the present invention; Figure 9 It is the schematic diagram of the structure of the arc extinguishing grid of the circuit breaker of the Internet of Things intelligent power protection device provided by an embodiment of the present invention from another perspective.

[0018] In the figure: 100, Circuit breaker; 101, Handle; 1011, Driving bevel gear; 1012, Rotating shaft; 1016, Driven bevel gear; 1017, Main transmission gear; 1018, Driven transmission gear; 1019, Support seat; 1020, Connecting shaft; 102, Housing; 103, Sealing cover; 104, Scraping blade; 200, Centrifugal impeller; 201, Blades; 202, Transmission rod; 2021, Mesh; 2022, Air inlet; 300, Arc extinguishing grid plate group; 301, Insulating support; 302, Fixing structure; 303, Arc extinguishing grid plate; 3031, Notch; 3032, Top block; 304, Dial ring; 400, Main contact; 500, Arc contact. Detailed implementation manners

[0019] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below through embodiments in combination with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The "connection" and "coupling" mentioned in the present invention, unless otherwise specifically stated, both include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0021] In the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0022] An Internet of Things intelligent power protection device proposed by the present invention is as Figure 1As shown in the figure, it includes a circuit breaker 100, which is improved on the existing circuit breaker, has the general structure of an existing relay, and realizes the functions of turning on, carrying, and breaking current of a conventional circuit breaker, including but not limited to common contact systems and operating mechanisms. In addition, as Figures 2 to 7 shown, it further includes a housing 102, a handle 101, an arc extinguishing grid group 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 through a rotating shaft 1012. The handle 101 is used for manually operating the circuit breaker 100. And when the circuit breaker 100 triggers a tripping signal, the energy storage mechanism (such as a tripping spring) in the operating mechanism releases energy, drives the handle 101 to rotate through structures such as linkages, gears, or cam mechanisms, and the rotation of the handle 101 is synchronized with the tripping state of the circuit breaker 100. The arc extinguishing grid group 300 is arranged in the arc extinguishing chamber and is used to guide, divide, and cool the arc, so as to achieve fast and reliable arc extinguishing. A hollow channel communicating with the outside is arranged inside the arc extinguishing grid group 300. The centrifugal impeller 200 is arranged in the hollow channel and is rotatably mounted on the housing 102 at both ends through bearings, and is used to guide the external air flow to the arc extinguishing chamber when rotating to accelerate the pressure relief of the arc extinguishing chamber. The transmission device connects the rotating shaft 1012 and the centrifugal impeller 200 to transmit the rotational motion generated by the handle 101 to the centrifugal impeller 200 during tripping, so that the centrifugal impeller 200 rotates. The rotation of the centrifugal impeller 200 can direct the air flow inhaled from the outside to the arc extinguishing chamber, enabling the arc extinguishing chamber to quickly relieve pressure and avoiding risks caused by untimely pressure relief, such as arc re-ignition, bursting of the housing 102, etc.

[0023] In addition, the Internet of Things intelligent power protection device further includes an intelligent terminal (not shown in the figure) for realizing the intelligent control and communication functions of the circuit breaker 100. The handle 101 can transmit the device 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 device status and perform remote operations anytime and anywhere through mobile phones or computers.

[0024] Compared with the prior art, in the present invention, through the structural design of the arc extinguishing grid group 300, the arc is guided, divided, and cooled, significantly improving the arc extinguishing efficiency. By combining the handle 101 with the hollow channel inside the arc extinguishing grid group 300 and the centrifugal impeller 200, during tripping, the rotation of the handle 101 can be transmitted to the centrifugal impeller 200, causing the centrifugal impeller 200 to rotate, guiding the air flow through the hollow channel to the arc extinguishing chamber, enabling the arc extinguishing chamber to quickly relieve pressure, and avoiding risks caused by untimely pressure relief. In addition, the air flow blows towards the arc through the hollow channel, also taking away the heat of the arc, reducing the temperature of the arc, accelerating the movement speed of the arc, and making it extinguish faster. Quick arc extinguishing reduces the ablation of the arc on the contacts and internal parts of the device, extends the service life of the device, and reduces the maintenance cost.

[0025] Since there is a time sequence in the arc contact with the arc extinguishing grid and the energy density of the arc is lower closer to the later stage, uneven damage degrees will occur on the arc extinguishing grid. Specifically, in this embodiment, when the device trips suddenly, the arc enters the arc extinguishing chamber along the Figure 6 direction indicated by the arrow in and is divided and extinguished. During this process, the energy of the arc decreases more and more as it moves upward, that is, the damage degree of the arc extinguishing grid gradually decreases from bottom to top. In some embodiments, as Figure 3 shown, insulating supports 301 (such as polytetrafluoroethylene (PTFE), ceramics or special plastics) are provided at both ends of the arc extinguishing grid sheet group 300 of the present application. The arc extinguishing grid sheet group 300 is rotatably installed in the arc extinguishing chamber through the two insulating supports 301 to allow adjustment of the arc extinguishing part of the arc extinguishing grid sheet group 300, avoid concentrated ablation at fixed positions, and the service life of the arc extinguishing grid sheet group 300 is increased by more than 3 times.

[0026] In some embodiments, as Figure 3 shown, the arc extinguishing grid sheet group 300 includes a plurality of arc extinguishing grid sheets 303 and a fixing structure 302 (such as a connecting rod) fixedly connecting the plurality of arc extinguishing grid sheets 303. The arc extinguishing grid sheets 303 are circular, and notches 3031 (such as Figure 8 shown) are provided thereon. The plurality of arc extinguishing grid sheets 303 are arranged in parallel, and top blocks 3032 are provided on both sides of each arc extinguishing grid sheet 303. The top blocks 3032 are sleeved on the fixing structure 302, and the top blocks 3032 are made of insulating materials to have a certain gap with the adjacent arc extinguishing grid sheets 303 for dividing the arc. The fixing structure 302 can be a high-strength insulating frame to ensure the stability of the arc extinguishing grid sheet group 300. A hollow channel is in the middle of each arc extinguishing grid sheet 303, and these hollow channels communicate with each other to form a complete air flow channel for guiding and accelerating the air flow to further cool the arc. As Figure 3 and Figure 7 shown, the centrifugal impeller 200 includes a transmission rod 202 and blades 201. The transmission rod 202 is coaxial with the hollow channel, and its two ends are rotatably installed on the housing 102 through bearings. An air inlet 2022 is provided at one end of the transmission rod 202, and an air inlet channel communicating with the air inlet 2022 is provided inside. An air outlet communicating with the hollow channel is provided on the side wall of the air inlet channel; the blades 201 are arranged circumferentially around the transmission rod 202. Specifically, the blades 201 adopt a vortex-type oblique cutting design. When the impeller rotates, air is sucked from the air inlet channel through centrifugal force and discharged outward through the air outlet, forming a strong air flow. These air flows pass through the hollow channels of the arc extinguishing grid sheet group 300, directly act on the arc, accelerate the cooling and extinguishing of the arc, and quickly discharge the metal vapor generated by the contact ablation from the arc extinguishing chamber, accelerate the pressure relief efficiency, and reduce the probability of arc restrike. Further, as Figure 9As shown, a mesh 2021 is provided at the air inlet 2022 for filtering impurities in the air. Both ends of the blade 201 are fixedly connected to the transmission rod 202 through a hub.

[0027] In some embodiments, as Figures 2 to 4 shown, the transmission device includes a bevel gear pair, a cylindrical gear pair and a connecting shaft 1020. The bevel gear pair is designed such that the rotational motion can change direction to adapt to the spatial layout inside the device, and the cylindrical gear pair is designed to further transmit and adjust the rotational speed. Specifically, the bevel gear pair includes a driving bevel gear 1011 and a driven bevel gear 1016 that mesh with each other, and the cylindrical gear pair includes a main transmission gear 1017 and a driven transmission gear 1018 that mesh with each other. The connecting shaft 1020 is rotatably mounted on the housing 102, and the driven bevel gear 1016 and the main transmission gear 1017 are respectively mounted at both ends of the connecting shaft 1020. Specifically, a support seat 1019 is mounted on the housing 102, and the connecting shaft 1020 is rotatably arranged on the support seat 1019 through a bearing assembly. The driving bevel gear 1011 is coaxially and fixedly arranged with the rotating shaft 1012 and is rotatably mounted on the housing 102. The driven transmission gear 1018 is mounted on one end of the transmission rod 202. During opening, the rotational motion generated by the handle 101 is transmitted to the driving bevel gear 1011 through the rotating shaft 1012. Through the combination of the bevel gear pair and the cylindrical gear pair in this application, 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 enabling normal operation even under high loads.

[0028] In some embodiments, as Figure 1 、 Figure 5 and Figure 9 shown, the circuit breaker 100 further includes a sealing cover 103. The sealing cover 103 is fixedly mounted on the housing 102 and covers the arc extinguishing grid plate group 300 and the transmission device. It is usually made of high-strength insulating materials such as insulating plastics or ceramics, and is used to confine the arc extinguishing process to a specific area, prevent the arc from spraying outwards, and protect other components inside the device and the safety of the operator.

[0029] In some embodiments, as Figure 9As shown, a shifting ring 304 is installed at one end of the arc extinguishing grid group 300. The shifting ring 304 is outside the sealing cover 103, facilitating manual operation by the operator. The shifting ring 304 is used to manually adjust the position of the arc extinguishing grid group 300 so that it can be rotated or the angle can be adjusted as needed without opening the sealing cover 103. The shifting ring 304 is usually made of high-strength insulating material to ensure the safety of the operator when contacting. Markings for identifying the position of the arc extinguishing grid group 300 are provided on the shifting ring 304 and the sealing cover 103. These markings can be scale lines, color coding or other visual identifiers. The markings are used to help the operator quickly identify the current position of the arc extinguishing grid group 300, ensuring that the arc extinguishing grid group 300 can be adjusted at the correct angle and direction, improving the accuracy and efficiency of the operation. Further, an LED or neon lamp is also provided on the circuit breaker 100 to display the on / off state of the circuit breaker 100 and the number of opening operations (e.g., green = on, red = off; yellow = more than 3 opening operations).

[0030] Since the arc extinguishing chamber needs to relieve pressure, it is usually not sealed from the outside, and dust may enter the arc extinguishing chamber and come into contact with the arc extinguishing grids 303, making the arc unable to be effectively divided and cooled. On the other hand, when the dust accumulates to a certain extent, a local insulating layer may be formed on the surface of the arc extinguishing grid, affecting its conductivity and heat dissipation performance, reducing the arc extinguishing efficiency, and even possibly causing the arc not to be extinguished in time, leading to potential safety hazards. Therefore, in some embodiments, as Figure 3 and Figure 5 shown, the circuit breaker 100 further includes a plurality of scraping blades 104. The scraping blades 104 are installed on the sealing cover 103. Each scraping blade 104 is disposed between two adjacent arc extinguishing grids 303, and both sides of each scraping blade 104 are in contact with the arc extinguishing grids 303. The shape and size of the scraping blades 104 can be designed according to the spacing and size of the arc extinguishing grids 303 to ensure that they can closely fit the arc extinguishing grids 303 and effectively achieve the scraping function for the two-side arc extinguishing grids 303. In addition, through the contact with the arc extinguishing grids 303, the scraping blades 104 can further divide the arc, increase the total resistance of the arc, reduce the current of the arc, and thus accelerate the extinction of the arc. Specifically, brushes can be bonded to both sides of the scraping blades 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 arranged to be in close contact with the arc extinguishing grids 303 to effectively remove carbon deposits and impurities, reduce arc ablation, and extend the service life of the arc extinguishing grids 303.

[0031] In some embodiments, as Figure 3 and Figure 5As shown, the bottom of the scraping blade 104 is installed at 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, ensuring that the scraping blade 104 can cover the entire side of the arc extinguishing grid 303 when the arc extinguishing grid group 300 rotates, and concentrating 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 detachable baffle is provided at the bottom of the collection groove for facilitating the cleaning of the collected dust.

[0032] The working principle and process of an embodiment of the present invention are as follows: When the Internet of Things intelligent power protection device disconnects the main contact 400 and the arc contact 500 due to overload, the current is transferred to the arc contact 500, and an arc is generated when the arc contact 500 separates. The generated arc will enter the arc extinguishing grid group 300 along the Figure 6 direction shown by the arrow in and is cut into multiple small arcs and finally extinguished. During this process, the handle 101 will trip and rotate downward under the action of the energy storage mechanism (not shown in the figure), and this rotation is transmitted to the driving bevel gear 1011 through the rotating shaft 1012, causing the driving bevel gear 1011 to rotate. 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 transmission gear 1017 and the driven transmission gear 1018. The rotation of the centrifugal impeller 200 will suck the air flow from the air inlet 2022 into the air inlet passage and discharge it along the Figure 7 direction of the arrow in and enter the arc extinguishing chamber, and act on the arc to improve the pressure relief efficiency and the moving speed of the arc. When the number of trips exceeds 3 times, the yellow indicator light flashes to remind the operator to rotate the dial ring 304 (the rotation direction is, for example, Figure 5 the direction of the arrow on the arc extinguishing grid 303 in), so that the entire arc extinguishing grid group 300 rotates by a certain angle to switch the arc extinguishing surface of the arc extinguishing grid 303. During the switching process, the scraping blade 104 can scrape the dust on the arc extinguishing grid 303 and deposit it at the bottom of the sealing cover 103. In addition, the setting of the scraping blade 104 can also guide the flow direction of the air flow to facilitate the rapid discharge of the air flow.

[0033] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as the scope recorded in this specification.

[0034] The above-described embodiments merely represent several implementation manners of the present invention. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the appended claims.

Claims

1. An Internet of Things intelligent power protection device, characterized in that, Comprising: A circuit breaker (100), the circuit breaker (100) comprising: A housing (102) provided with an arc extinguishing chamber thereon; A handle (101) rotatably mounted on the housing (102) via a rotating shaft (1012); An arc extinguishing grid group (300) disposed in the arc extinguishing chamber, and a hollow channel communicating with the outside is provided inside the arc extinguishing grid group (300); A centrifugal impeller (200) disposed in the hollow channel and rotatably mounted at both ends on the housing (102) for guiding the outside air flow to the arc extinguishing chamber when rotating; and A transmission device connecting the rotating shaft (1012) and the centrifugal impeller (200) to transmit the rotational motion generated by the handle (101) to the centrifugal impeller (200) during opening to make the centrifugal impeller (200) rotate.

2. The Internet of Things intelligent power protection device according to claim 1, characterized in that Insulating supports (301) are provided at both ends of the arc extinguishing grid group (300), and the arc extinguishing grid group (300) is rotatably mounted in the arc extinguishing chamber via two insulating supports (301).

3. The Internet of Things intelligent power protection device according to claim 2, wherein, The arc extinguishing grid group (300) includes a plurality of arc extinguishing grids (303) and a fixing structure (302) fixedly connecting the plurality of arc extinguishing grids (303), and the hollow channel is in the middle of each arc extinguishing grid (303); the centrifugal impeller (200) includes a transmission rod (202) and blades (201), the transmission rod (202) is coaxial with the hollow channel, an air inlet (2022) is provided at one end of the transmission rod (202), an air inlet channel communicating with the air inlet (2022) is provided inside, and an air outlet communicating with the hollow channel is provided on the side wall of the air inlet channel; the blades (201) are arranged circumferentially around the transmission rod (202).

4. The Internet of Things intelligent power protection device according to claim 3, wherein, The transmission device includes a bevel gear pair, a cylindrical gear pair and a connecting shaft (1020); the bevel gear pair includes a driving bevel gear (1011) and a driven bevel gear (1016) meshing with each other, and the cylindrical gear pair includes a main transmission gear (1017) and a driven transmission gear (1018) meshing with each other; the connecting shaft (1020) is rotatably mounted on the housing (102), and the driven bevel gear (1016) and the main transmission gear (1017) are respectively mounted at both ends of the connecting shaft (1020); the driving bevel gear (1011) is coaxially arranged with the rotating shaft (1012) and rotatably mounted on the housing (102); the driven transmission gear (1018) is mounted at the other end of the transmission rod (202); the rotational motion generated by the handle (101) during opening can be transmitted to the driving bevel gear (1011).

5. The Internet of Things intelligent power protection device according to claim 4, characterized in that, A through hole is provided in the middle of the driving bevel gear (1011); one end of the rotating shaft (1012) extends out of the housing (102), and the rotating shaft (1012) is coaxially and fixedly connected to the driving bevel gear (1011) through the through hole.

6. The Internet of Things intelligent power protection device according to claim 5, characterized in that, A mesh sheet (2021) is provided at the air inlet (2022).

7. The Internet of Things intelligent power protection device according to claim 1, characterized in that, The circuit breaker (100) further includes a sealing cover (103), and the sealing cover (103) is fixedly installed on the housing (102), and the sealing cover (103) covers the arc extinguishing grid sheet group (300) and the outside of the transmission device.

8. The Internet of Things intelligent power protection device according to claim 7, wherein A dial ring (304) is installed at one end of the arc extinguishing grid sheet group (300), the dial ring (304) is located outside the sealing cover (103), and marks for identifying the position of the arc extinguishing grid sheet group (300) are provided on the dial ring (304) and the sealing cover (103).

9. The Internet of Things intelligent power protection device according to claim 7, characterized in that The circuit breaker (100) further includes a plurality of scraping blades (104), and the scraping blades (104) are installed inside the sealing cover (103), and each scraping blade (104) is arranged between two adjacent arc extinguishing grid sheets (303), and both sides of each scraping blade (104) are in contact with the arc extinguishing grid sheets (303).

10. The Internet of Things intelligent power protection device according to claim 9, characterized in that, The scraping blade (104) extends from the outer end to the inner end of the arc extinguishing grid sheet (303) along the radial and circumferential directions of the arc extinguishing grid sheet (303).

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