Modular switchgear internal arc protection device

Abstract

This invention discloses a modular arc-extinguishing protection device for internal switchgear, comprising a protective enclosure, an axial flow fan, an early warning processing module installed inside the protective enclosure, and a data acquisition module installed inside the protective enclosure. The protective enclosure is mounted on top of the switchgear, and the axial flow fan is located inside the protective enclosure. The bottom end of the axial flow fan is detachably mounted on the bottom surface of the protective enclosure, and the air inlet at the bottom end of the axial flow fan is sequentially connected to the bottom surface of the protective enclosure and the top of the switchgear. A main air inlet is evenly distributed on the side of the protective enclosure, and an exhaust fan connected to the interior is installed on the exterior of the protective enclosure. A pressure relief assembly is installed on the top of the protective enclosure. The axial flow fan continuously draws hot air from inside the switchgear into the protective enclosure and exhausts it through the exhaust fan. External cold air is introduced through the switchgear's built-in air vents, forming a forced-air-cooling negative pressure heat dissipation circulation at the top. This solves the problems of traditional heat dissipation devices being scattered around the switchgear, leading to cumbersome installation and maintenance, and poor adaptability, thus improving the device's versatility and installation convenience.

Description

Technical Field

[0001] This invention relates to an internal arc protection device for modular switchgear, belonging to the field of power system equipment technology. Background Technology

[0002] Switchgear is widely used in power systems due to its advantages such as ease of operation and reliable performance. However, its structure is relatively sealed, and its internal space is limited. When a short-circuit arc fault occurs inside the switchgear, it releases enormous energy instantaneously, generating high-temperature, high-pressure gases. If these gases cannot be effectively guided and discharged, they can easily cause cabinet explosions, structural damage, or even fires, seriously threatening the personal safety of maintenance personnel and the stable operation of the power system.

[0003] During normal operation, high-current equipment inside the switchgear, such as busbars, circuit breakers, and instrument transformers, generates a large amount of heat. Especially during high-load or high-temperature seasons, if the heat cannot be dissipated in time, the temperature inside the cabinet will continue to rise, accelerating the aging of insulation materials, increasing contact resistance, and thus inducing partial discharge or short-circuit faults.

[0004] Patent CN219980203U discloses a heat dissipation device for a 10kV switchgear in a tram. It achieves heat dissipation control by installing an active heat dissipation module with a negative pressure exhaust fan at the top of the switchgear cabinet and an auxiliary heat dissipation module with a positive pressure intake fan at the rear, in conjunction with a temperature and humidity controller. While this solution introduces active heat dissipation, its heat dissipation modules are distributed, with the active and auxiliary modules installed in different locations within the cabinet, making installation and maintenance cumbersome. Furthermore, each module requires a dedicated bracket to connect to the cabinet, resulting in poor adaptability to retrofitting existing switchgear and hindering its widespread adoption.

[0005] Patent CN117578236A discloses a heat dissipation device and online monitoring system for switchgear. It features air inlet grilles on both sides of the switchgear's bottom and multiple air supply mechanisms to introduce cold air and exhaust hot air. This solution creates air convection circulation between the inside and outside of the cabinet to some extent. However, the heat dissipation device is entirely embedded inside the switchgear and lacks a modular design, requiring structural adaptation for different switchgear models, thus limiting its versatility. Furthermore, the air inlets are located on both sides of the bottom of the cabinet, and the air supply mechanisms are primarily located in the bottom area. In actual operation, the busbars, where heat is most concentrated, are usually located at the top of the switchgear. This results in bottom air supply and heat accumulation at the top, leading to less than ideal heat dissipation in critical areas.

[0006] Therefore, how to achieve efficient heat dissipation of the switchgear while also meeting the need for rapid pressure relief in case of internal arcing failure, and how to improve the modularity and universal adaptability of the device, has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0007] Purpose of the invention: To address the shortcomings of existing technologies, this invention provides a modular switchgear internal arc protection device. This invention solves the problems of poor adaptability and lack of arc protection in existing devices by using modular top ventilation and arc pressure relief early warning.

[0008] Technical Solution: A modular switchgear internal arc protection device includes a protective enclosure, an axial flow fan, an early warning processing module installed inside the protective enclosure, and a data acquisition module installed inside the protective enclosure. The protective enclosure is installed on the top of the switchgear. The axial flow fan is located inside the protective enclosure, with its bottom end detachably installed on the bottom surface of the protective enclosure. The air inlet at the bottom of the axial flow fan is sequentially connected to the bottom surface of the protective enclosure and the top of the switchgear. A main air inlet is evenly distributed on the side of the protective enclosure, and an exhaust fan connected to the interior is installed on the exterior of the protective enclosure. A pressure relief assembly is installed on the top of the protective enclosure. The early warning processing module and the data acquisition module are signal connected.

[0009] This invention modularly installs the protective enclosure on top of the switchgear. An axial flow fan continuously draws hot air from inside the switchgear into the protective enclosure, which is then exhausted by an exhaust fan. Once the hot air is removed, cool external air naturally enters through the switchgear's main air inlet, balancing the pressure inside and outside the protective enclosure and aiding in internal heat dissipation. This creates a negative pressure cooling cycle through forced top ventilation, effectively solving the problems of cumbersome installation and maintenance, and poor adaptability caused by the dispersed layout of protective devices in existing technologies. A data acquisition module collects real-time environmental data from inside the protective enclosure to determine if a malfunction has occurred. An early warning processing module issues warnings based on the collected data, integrating heat dissipation and arcing warning functions. A pressure relief component automatically activates to release pressure in the event of internal arcing, addressing the safety hazards caused by the lack of arcing pressure relief functionality in existing technologies.

[0010] In a preferred embodiment, to ensure the axial flow fan maintains installation stability during high-speed operation, a mounting plate is also included. The two ends of the mounting plate are detachably connected to the two inner sides of the protective housing, respectively. The mounting plate is provided with a fan positioning hole. The exhaust port at the top of the axial flow fan is detachably connected to the mounting plate, and the fan positioning hole is coaxially arranged with the exhaust port at the top of the axial flow fan and the air inlet at the bottom of the axial flow fan.

[0011] By setting up an installation plate and fan positioning holes, the top of the axial flow fan can be detachably connected to the installation plate, and the bottom can be detachably connected to the bottom surface of the protective box. This achieves double fixation at both ends of the fan, effectively suppressing the vibration generated by the high-speed rotation of the fan and avoiding loose connections or noise problems caused by vibration.

[0012] In a preferred embodiment, to further improve the processing convenience and structural adaptability of the mounting plate, the mounting plate includes a crossbeam, with bent plates detachably connected to both ends of the crossbeam, the fan positioning hole being opened on the crossbeam, and the mounting plate being detachably connected to the two inner sides of the protective box through the bent plates at both ends.

[0013] By adopting a separate and detachable structure for the crossbeam and the bent plates at both ends, the length of the crossbeam can be flexibly adjusted according to the size of the protective box and the type of axial flow fan. At the same time, the large-area fit between the bent plates and the side of the box enhances the overall rigidity, ensuring the stability of the fan fixation and the flexibility of assembly.

[0014] In a preferred embodiment, in order to achieve rapid directional pressure relief during internal arcing, the pressure relief assembly includes a pressure relief port on the top of the protective housing, an explosion-proof plate with ventilation openings, and plastic screws. One end of the explosion-proof plate is rotatably connected to the edge of the housing of the pressure relief port. The explosion-proof plate covers the entire pressure relief port and is detachably connected to the edge of the housing of the pressure relief port via plastic screws.

[0015] When an arc explosion occurs inside the switchgear, the high-temperature and high-pressure gas generated quickly causes the plastic screws to break, thereby causing the explosion-proof plate to automatically open upwards around the rotatable end, allowing the high-temperature and high-pressure gas inside to be discharged directionally from the top, preventing the gas from spraying out from the cabinet door or side and injuring people, thus effectively reducing the harm to the surrounding personnel.

[0016] In a preferred embodiment, in order to monitor temperature changes inside the protective enclosure in real time, the acquisition module includes a temperature acquisition device, which is signal-connected to the early warning processing module.

[0017] By setting up a temperature acquisition device and transmitting the temperature data to the early warning processing module, the system can determine whether the device's heat dissipation is faulty or whether an arc has occurred inside the switch cabinet based on the temperature value and the rate of temperature rise, providing a data basis for subsequent early warning control.

[0018] In a preferred embodiment, to prevent moisture in the low-temperature air entering through the main air inlet from damaging the internal electrical components, a drying chamber is provided inside the protective enclosure, and the acquisition module also includes a humidity collector, which is signal-connected to the early warning processing module.

[0019] By setting up a drying chamber and filling it with desiccant and superabsorbent polymer, the device effectively absorbs moisture from the incoming air. At the same time, a humidity collector monitors humidity data in real time and transmits it to the early warning processing module. When the humidity is too high, an alarm can be triggered or dehumidification measures can be started, ensuring the long-term reliable operation of the device.

[0020] In a preferred embodiment, to enhance the efficiency of hot air exhaust from the protective enclosure, the exhaust fans outside the protective enclosure are located on the sides of the protective enclosure, with at least two sets of exhaust fans on each side.

[0021] By installing at least two sets of exhaust fans on multiple sides of the protective enclosure, a multi-point, multi-directional exhaust layout is formed, avoiding the retention of hot air caused by single-sided exhaust, ensuring that the hot air drawn in by the axial flow fan can be discharged to the outside in a timely and even manner, and maintaining the efficient operation of the heat dissipation system.

[0022] In a preferred embodiment, in order to achieve the classification and processing of temperature and humidity data and local audible and visual early warning, the early warning processing module includes a temperature processing unit, a humidity processing unit, and a buzzer, which are respectively signal-connected to the control unit. The temperature processing unit is signal-connected to the temperature collector, and the humidity processing unit is signal-connected to the humidity collector.

[0023] By setting up temperature processing units and humidity processing units to analyze and judge temperature and humidity data respectively, when the temperature or humidity exceeds the preset threshold, the control unit drives the buzzer to sound an alarm, so as to promptly remind on-site maintenance personnel to pay attention to the abnormal status.

[0024] In a preferred embodiment, to visually display the normal, faulty, and high-temperature status of the device, a warning light is also provided on the outer side of the protective enclosure, and the control unit is connected to the warning light signal.

[0025] By setting up warning lights that are connected to the control unit signal, the lights will display green when the device is working normally, and switch to yellow or flashing red when a fault occurs or the temperature and humidity are abnormal. This allows on-site personnel to quickly determine the operating status of the equipment without having to check the display screen, thus improving inspection efficiency.

[0026] In a preferred embodiment, in order to transmit the measured temperature and humidity data to the outside for real-time online monitoring and early warning of the switch cabinet, an antenna installed on the top of the protective enclosure is also included. The early warning processing module is connected to the antenna signal, and the early warning processing module sends the early warning information to the personnel monitoring terminal through the antenna.

[0027] By setting up an antenna, the temperature and humidity data and alarm information processed by the early warning processing module are wirelessly transmitted to the personnel monitoring terminal, realizing remote centralized monitoring, reducing the frequency of manual inspections, and improving the speed of fault response.

[0028] Beneficial Effects: This invention modularly installs the protective enclosure on top of the switchgear. An axial flow fan continuously draws hot air from inside the switchgear into the protective enclosure, which is then exhausted by an exhaust fan. Simultaneously, external cold air is naturally introduced through the switchgear's main air inlet, balancing the pressure inside and outside the protective enclosure and aiding internal heat dissipation. This achieves a negative pressure cooling cycle created by forced top ventilation, effectively solving the problems of cumbersome installation and maintenance, and poor adaptability caused by the dispersed layout of protective devices in existing technologies. This improves the device's versatility and ease of installation. The data acquisition module collects environmental data in real time, and the early warning processing module uses this data to determine fan failure or internal arcing and issues an early warning, integrating heat dissipation and arcing warning functions, thus improving fault response capabilities. In the event of internal arcing, the pressure relief component automatically opens the explosion-proof plate for directional pressure relief by the breakage of plastic screws, effectively reducing the harm of high-temperature, high-pressure gas to surrounding personnel and compensating for the lack of arcing pressure relief functionality in existing technologies. Temperature and humidity sensors are installed to provide a data foundation for temperature rise rate judgment and arcing warning. The exhaust fan adopts a multi-sided, multi-group layout, enhancing the efficiency of hot air exhaust and preventing stagnation. The early warning processing module integrates a temperature and humidity processing unit and a buzzer to realize local audible and visual alarms; together with the warning light, it intuitively displays the operating status, improving inspection efficiency; it can meet the comprehensive requirements of switch cabinets for efficient heat dissipation and cooling, rapid pressure relief of arcing, intelligent early warning, and modular universal adaptability. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the assembly of the protective enclosure and the switch cabinet of the present invention; Figure 2 This is a schematic diagram of the installation of the exhaust fan in the protective enclosure of the present invention; Figure 3 This is a schematic diagram of the main air inlet, warning lights, and human-machine interface screen of the present invention; Figure 4 This is a schematic diagram of the internal structure of the present invention; Figure 5 This is a structural diagram of the mounting plate of the present invention; Figure 6 This is a structural diagram of the pressure relief component of the present invention. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and 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. Therefore, they should not be construed as limitations on this invention.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] like Figures 1-6 As shown, a modular switchgear internal arc protection device includes a protective enclosure 1, an axial flow fan 2, an early warning processing module 3 installed inside the protective enclosure 1, and a data acquisition module installed inside the protective enclosure 1. The protective enclosure 1 is installed on the top of the switchgear 4. The axial flow fan 2 is located inside the protective enclosure 1. The bottom end of the axial flow fan 2 is detachably installed on the bottom surface of the protective enclosure 1, and the air inlet at the bottom end of the axial flow fan 2 is sequentially connected to the bottom surface of the protective enclosure 1 and the top of the switchgear 4. The protective enclosure 1 has a total air inlet 5 evenly distributed on its side. An exhaust fan 6 connected to the interior is installed on the outside of the protective enclosure 1. A pressure relief assembly 7 is installed on the top of the protective enclosure 1. The early warning processing module 3 is signal-connected to the data acquisition module.

[0035] By modularly installing the protective enclosure 1 on top of the switchgear 4, an axial flow fan 2 continuously draws hot air from inside the switchgear 4 into the protective enclosure 1, which is then exhausted by the exhaust fan 6. After the hot air inside the switchgear 4 is drawn away, external cold air is naturally introduced through the main air inlet 5, balancing the pressure inside and outside the protective enclosure 1 and assisting in internal heat dissipation. This achieves a negative pressure heat dissipation cycle formed by forced air cooling at the top, effectively solving the problems of cumbersome installation and maintenance and poor adaptability caused by the dispersed layout of heat dissipation devices in existing technologies. The data acquisition module collects real-time environmental data inside the protective enclosure 1 to determine whether the device has malfunctioned. The early warning processing module 3 issues early warnings based on the collected data, realizing the integration of heat dissipation and arcing early warning functions. The pressure relief component 7 can automatically open to relieve pressure when internal arcing occurs, solving the safety hazards caused by the lack of arcing pressure relief function in existing technologies.

[0036] To ensure the stability of the axial flow fan 2 during high-speed operation, a mounting plate 8 is also included. The two ends of the mounting plate 8 are detachably connected to the two inner sides of the protective housing 1. The mounting plate 8 is provided with a fan positioning hole 81. The exhaust port at the top of the axial flow fan 2 is detachably connected to the mounting plate 8, and the fan positioning hole 81 is coaxially arranged with the exhaust port at the top of the axial flow fan 2 and the air inlet at the bottom of the axial flow fan 2.

[0037] By setting the mounting plate 8 and the fan positioning hole 81, the top end of the axial flow fan 2 is detachably connected to the mounting plate 8, and the bottom end is detachably connected to the bottom surface of the protective box 1, so as to achieve double fixation at both ends of the fan, effectively suppressing the vibration generated by the high-speed rotation of the fan, and avoiding loose connection or noise problems caused by vibration.

[0038] To further improve the processing convenience and structural adaptability of the mounting plate 8, the mounting plate 8 includes a crossbeam 82, and two ends of the crossbeam 82 are respectively detachably connected to bent plates 83. The fan positioning hole 81 is opened on the crossbeam 82, and the mounting plate 8 is detachably connected to the two inner sides of the protective box 1 through the bent plates 83 at both ends.

[0039] By adopting a split and detachable connection structure between the crossbeam 82 and the bending plates 83 at both ends, the mounting plate 8 can flexibly adjust the length of the crossbeam 82 according to the different sizes of the protective box 1 and the different types of axial flow fans 2. At the same time, the large-area fit between the bending plates 83 and the side of the box enhances the overall rigidity, ensuring the stability of the fan fixing and the flexibility of assembly.

[0040] In order to achieve rapid directional pressure relief during internal arcing, the pressure relief assembly 7 includes a pressure relief port 71 on the top of the protective housing 1, an explosion-proof plate 72 with ventilation openings, and plastic screws 73. One end of the explosion-proof plate 72 is rotatably connected to the edge of the housing of the pressure relief port 71. The explosion-proof plate 72 covers the entire pressure relief port 71 and is detachably connected to the edge of the housing of the pressure relief port 71 by the plastic screws 73.

[0041] When an arc explosion occurs inside switchgear 4, the high-temperature and high-pressure gas generated quickly causes the plastic screw 73 to break, thereby causing the explosion-proof plate 72 to automatically open upward around the rotatable end, directionally discharging the high-temperature and high-pressure gas from the top, preventing the gas from spraying out from the cabinet door or side and injuring people, thus effectively reducing the harm to the surrounding personnel.

[0042] In order to monitor the temperature changes inside the protective enclosure 1 in real time, the acquisition module includes a temperature acquisition device 9, which is connected to the early warning processing module 3.

[0043] By setting up a temperature acquisition device 9 and transmitting the temperature data to the early warning processing module 3, the system can determine whether the heat dissipation of the device is faulty or whether an arc has occurred inside the switch cabinet 4 based on the temperature value and the rate of temperature rise, thus providing a data basis for subsequent early warning control.

[0044] To prevent moisture in the low-temperature air entering through the main air inlet 5 from damaging the internal electrical components, a drying box 10 is provided inside the protective enclosure 1. The acquisition module also includes a humidity collector 17, which is signal-connected to the early warning processing module 3.

[0045] By setting up a drying chamber 10 and filling it with desiccant and super absorbent polymer, the moisture in the incoming air is effectively absorbed. At the same time, the humidity collector 17 monitors the humidity data in real time and transmits it to the early warning processing module 3. When the humidity is too high, an alarm can be triggered or dehumidification measures can be started to ensure the long-term reliable operation of the device. Example 1

[0046] To prevent impurities in the outside air from entering the structure and contaminating the electrical components, a filter 13 is also included, which is installed inside the protective housing 1 and is located on the side of the main air inlet 5.

[0047] By installing a filter screen 13 on the inner side of the protective housing 1 corresponding to the main air inlet 5, the air entering the protective housing 1 is filtered and dust is removed, preventing dust from accumulating on the fan, circuit board and sensor, reducing the failure rate and reducing the maintenance frequency.

[0048] In order to enhance the efficiency of hot air exhaust from the protective enclosure 1, the exhaust fans 6 outside the protective enclosure 1 are installed on the sides of the protective enclosure 1, with at least two sets of exhaust fans 6 installed on each side.

[0049] By setting at least two sets of exhaust fans 6 on multiple sides of the protective enclosure 1, a multi-point, multi-directional exhaust layout is formed, avoiding the retention of hot air caused by single-sided exhaust, ensuring that the hot air drawn in by the axial flow fan 2 can be discharged to the outside in a timely and even manner, and maintaining the efficient operation of the heat dissipation system.

[0050] In order to achieve the classification and processing of temperature and humidity data and local audible and visual early warning, the early warning processing module 3 includes a temperature processing unit, a humidity processing unit, and a buzzer that are respectively signal-connected to the control unit. The temperature processing unit is signal-connected to the temperature acquisition unit 9, and the humidity processing unit is signal-connected to the humidity acquisition unit 17.

[0051] The temperature and humidity processing units analyze and judge the temperature and humidity data separately. When the temperature or humidity exceeds the preset threshold, the control unit drives the buzzer to sound an alarm, promptly alerting on-site maintenance personnel to the abnormal condition. The temperature processing unit, humidity processing unit, and buzzer are integrated into the configuration.

[0052] To visually display the normal, faulty, and high-temperature status of the device, a warning light 11 is also provided on the outer side of the protective housing 1, and the control unit is connected to the warning light 11.

[0053] By setting an alarm light 11 that is connected to the control unit signal, the light will be green when the device is working normally, and will switch to yellow or red flashing when a fault occurs or the temperature and humidity are abnormal. This allows on-site personnel to quickly determine the operating status of the equipment without having to check the display screen, thus improving inspection efficiency. Example 2

[0054] In order to realize the human-computer interaction functions of parameter configuration, historical data viewing, and real-time temperature and humidity display, the outer side of the protective box 1 is also provided with a human-computer interaction screen 14, which is connected to the early warning processing module 3.

[0055] By setting up a human-machine interface screen 14 that is connected to the early warning processing module 3, maintenance personnel can directly modify alarm thresholds, view historical temperature and humidity curves and current real-time data on-site, which facilitates debugging, maintenance and fault tracing. Example 3

[0056] In order to enable remote detection, testing and status monitoring of the device, the early warning processing module 3 also includes a wireless transmission circuit unit connected to the control unit, and the wireless transmission circuit unit is connected to the mobile terminal.

[0057] By setting up a wireless transmission circuit unit, the temperature and humidity data, fan status, and alarm information collected by the control unit are sent to the mobile terminal, which makes it convenient for maintenance personnel to remotely check the operation of the device and promptly grasp fault information.

[0058] In order to transmit the measured temperature and humidity data to the outside world so as to enable real-time online monitoring and early warning of switch cabinet 4, an antenna 12 is also included, which is installed on the top of the protective box 1. The early warning processing module 3 is connected to the antenna 12, and the early warning processing module 3 sends the early warning information to the personnel monitoring terminal through the antenna 12.

[0059] By setting up antenna 12, the temperature and humidity data and alarm information processed by the early warning processing module 3 are wirelessly transmitted to the personnel monitoring terminal, realizing remote centralized monitoring, reducing the frequency of manual inspections, and improving the fault response speed. Example 4

[0060] To provide auxiliary lifting function during installation and handling, handles 15 are installed on both sides of the protective box 1, and lifting lugs 16 are installed on the top of the protective box 1 along the diagonal direction.

[0061] By symmetrically setting handles 15 on both sides of the protective box 1 for manual lifting, and setting lifting lugs 16 on the top along the diagonal direction for hoisting equipment, the handling needs of different installation scenarios are met and the installation difficulty is reduced.

[0062] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0063] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A modular switchgear internal arc protection device, characterized by: The system includes a protective enclosure (1), an axial flow fan (2), an early warning processing module (3) installed inside the protective enclosure (1), and a data acquisition module installed inside the protective enclosure (1). The protective enclosure (1) is installed on the top of the switch cabinet (4). The axial flow fan (2) is located inside the protective enclosure (1). The bottom end of the axial flow fan (2) is detachably installed on the bottom surface of the protective enclosure (1), and the air inlet at the bottom end of the axial flow fan (2) is sequentially connected to the bottom surface of the protective enclosure (1) and the top of the switch cabinet (4). The protective enclosure (1) has a total air inlet (5) evenly distributed on its side. The protective enclosure (1) is equipped with an exhaust fan (6) that communicates with the interior. The protective enclosure (1) is equipped with a pressure relief assembly (7) on its top. The early warning processing module (3) is connected to the data acquisition module.

2. The modular switchgear internal arc protection device according to claim 1, characterized in that: It also includes an installation plate (8), the two ends of which are detachably connected to the two inner sides of the protective box (1). The installation plate (8) is provided with a fan positioning hole (81). The exhaust port at the top of the axial flow fan (2) is detachably connected to the installation plate (8), and the fan positioning hole (81) is coaxially arranged with the exhaust port at the top of the axial flow fan (2) and the air inlet at the bottom of the axial flow fan (2).

3. The modular switchgear internal arc protection device according to claim 2, characterized in that: The mounting plate (8) includes a crossbeam (82), and two ends of the crossbeam (82) are detachably connected to bent plates (83). The fan positioning hole (81) is opened on the crossbeam (82). The mounting plate (8) is detachably connected to the two inner sides of the protective box (1) through the bent plates (83) at both ends.

4. The modular switchgear internal arc protection device according to claim 1, characterized in that: The pressure relief assembly (7) includes a pressure relief port (71) on the top of the protective housing (1), an explosion-proof plate (72) with a vent, and plastic screws (73). One end of the explosion-proof plate (72) is rotatably connected to the edge of the pressure relief port (71). The explosion-proof plate (72) covers the entire pressure relief port (71) and is detachably connected to the edge of the pressure relief port (71) by plastic screws (73).

5. The modular switchgear internal arc protection device according to claim 1, characterized in that: The acquisition module includes a temperature acquisition device (9), which is signal-connected to the early warning processing module (3).

6. The modular switchgear internal arc protection device according to claim 5, characterized in that: The protective enclosure (1) is equipped with a drying box (10), and the acquisition module also includes a humidity collector (17), which is connected to the early warning processing module (3).

7. The modular switchgear internal arc protection device according to claim 1, characterized in that: The exhaust fans (6) outside the protective box (1) are located on the sides of the protective box (1), with at least two sets of exhaust fans (6) on each side.

8. The modular switchgear internal arc protection device according to claim 1, characterized in that: The early warning processing module (3) includes a temperature processing unit, a humidity processing unit, and a buzzer, which are respectively connected to the control unit. The temperature processing unit is connected to the temperature collector (9), and the humidity processing unit is connected to the humidity collector (17).

9. The modular switchgear internal arc protection device according to claim 8, characterized in that: The outer side of the protective enclosure (1) is also provided with a warning light (11), and the control unit is connected to the warning light (11) via signal.

10. The modular switchgear internal arc protection device according to claim 1, characterized in that: It also includes an antenna (12) installed on the top of the protective box (1). The early warning processing module (3) is connected to the antenna (12) and the early warning processing module (3) sends the early warning information to the personnel monitoring terminal through the antenna (12).

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