A kind of all-weather protection switchgear of fault self-diagnosis and redundant fire extinguishing trigger

Abstract

This invention discloses an all-weather protective distribution cabinet with fault self-diagnosis and redundant fire suppression triggering, relating to the field of smart grid distribution cabinets. The invention includes a cabinet shell, a heat-conducting cabinet layer, condenser fins, a component mounting array, and multiple dry powder fire extinguishing gas canisters with different production dates. A negative pressure phase-change heat transfer structure is constructed through the heat-conducting cabinet layer and condenser fins to achieve efficient heat dissipation; a stable airflow and dynamic dust removal system are formed by combining a pressure fan and a rotating cylindrical filter to improve ventilation efficiency; multi-point temperature sensors enable thermal field monitoring and fan control; for fire prevention, multi-time gradient fire extinguishing gas canisters and a graded triggering mechanism are adopted to improve fire suppression reliability; a magnetic bottom pressure relief structure is also provided to automatically release gas in case of abnormal pressure, protecting the cabinet structure. This effectively improves the heat dissipation performance, fire resistance, and operational safety of the distribution cabinet.

Description

Technical Field

[0001] This invention relates to the field of smart grid distribution cabinets, specifically to an all-weather protection distribution cabinet with fault self-diagnosis and redundant fire suppression triggering. Background Technology

[0002] Existing distribution cabinets typically employ a closed or semi-closed structure, relying on simple fans for air circulation to dissipate heat from power grid components. While this type of structure primarily depends on air convection to remove heat, the unclear airflow path and complex internal layout often lead to localized heat buildup, especially under high loads or when components are densely packed. This can easily create hotspots, causing components to overheat or even experience thermal runaway. Regarding fire safety, current technologies typically only include a single fire extinguishing device. If this device becomes aging, malfunctions, or lacks sufficient pressure, the fire protection capability will be directly compromised. Furthermore, existing systems lack dynamic management of the fire extinguishing device's expiration date, leading to expired equipment and reduced overall safety. Additionally, when the fire extinguishing device is activated, it generates high pressure inside the cabinet. Traditional distribution cabinets lack effective pressure relief structures, which can easily cause cabinet deformation or even cracking, resulting in secondary damage to equipment and the surrounding environment. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, the present invention provides the following technical solution: a self-diagnostic fault and redundant fire extinguishing trigger all-weather protection distribution cabinet, comprising a cabinet shell, condenser fins, a heat-conducting cabinet layer, device mounting blocks, and three dry powder fire extinguishing gas canisters with different production dates; the heat-conducting cabinet layer is fixedly attached to the inner wall of the cabinet shell, and condenser fins are fixedly provided on the top of the inner wall of the heat-conducting cabinet layer, the condenser fins and the interior of the heat-conducting cabinet layer are hollow and interconnected; multiple rows of device mounting blocks are fixed on the inner wall of the heat-conducting cabinet layer, the device mounting blocks are used to install power grid distribution devices; multiple temperature sensors are also provided on the inner side of the heat-conducting cabinet layer to monitor the temperature of the power grid distribution devices installed on the device mounting blocks; the upper and lower surfaces of the cabinet shell are respectively provided with air pressure fans for driving airflow inside the cabinet shell and cylindrical filters for filtering air impurities.

[0004] Preferably, the hollow interconnected structure inside the condenser fins and the heat-conducting cabinet layer is set with a negative pressure environment, and deionized water / electronic fluorinated liquid is placed inside the hollow interconnected structure; the bottom edge of the condenser fins is symmetrically set with inclined surfaces, so that the middle height of the bottom edge of the condenser fins is higher than the height of the two ends, which facilitates the condensed water inside the condenser fins to slide down into the heat-conducting cabinet layer.

[0005] Preferably, a circular through-hole is provided at the bottom of the cabinet shell, and a cylindrical filter screen is rotatably disposed in the circular through-hole. A magnetic rotating ring support plate is fixedly installed on the bottom of the inner wall of the cabinet shell, and a magnetic rotating ring is rotatably installed on the magnetic rotating ring support plate. The top edge of the cylindrical filter screen is magnetically attracted to the magnetic rotating ring, and a sealing rubber ring is provided on the contact surface between the cylindrical filter screen and the magnetic rotating ring. A drive motor is also fixedly installed on the cabinet shell, and a drive pulley is fixedly installed on the output shaft of the drive motor. The drive pulley is connected to the magnetic rotating ring by a transmission belt.

[0006] Preferably, a rectangular through hole is provided on the top of the cabinet shell, wherein the condenser fins are aligned with the rectangular through hole, and a pressure fan air guide cover is provided on the rectangular through hole. The pressure fan air guide cover is fixedly installed on the cabinet shell, wherein the pressure fan is rotatably installed inside the pressure fan air guide cover, and a top air guide cover is fitted on the outside of the pressure fan air guide cover. The top air guide cover is fixedly installed on the cabinet shell, and exhaust nozzles are provided on both sides of the top air guide cover.

[0007] Preferably, external heat dissipation fins are fixedly installed on both symmetrical surfaces of the outer surface of the cabinet shell. The external heat dissipation fins are thermally connected to the heat-conducting cabinet layer through the cabinet shell body. Each external heat dissipation fin is covered with a thin film plate on its side. The top of the external heat dissipation fin passes through an exhaust nozzle, so that the airflow blown out of the exhaust nozzle passes through the external heat dissipation fins.

[0008] Preferably, a door panel is also movably installed on the outer shell of the cabinet, wherein three dry powder fire extinguishing gas cylinders are fixedly installed inside the door panel by fire extinguishing gas cylinder brackets (so that they can be fixedly connected in a way that is easy to disassemble and replace later). Each dry powder fire extinguishing gas cylinder has a nozzle connected to its exhaust port by an electric valve, and the nozzles are directed toward the power distribution device on the inner side of the heat-conducting cabinet layer.

[0009] Preferably, a UPS backup power supply is also fixedly installed inside the door panel; a sealing gasket is fixedly installed on the cabinet shell at the mating surface with the door panel, the sealing gasket is used to improve the sealing performance of the door panel when closed on the cabinet shell.

[0010] Preferably, a bottom protective mesh cover is provided on the outer side of the cylindrical filter screen, and the bottom protective mesh cover is magnetically fixed to the bottom of the cabinet shell, which facilitates the replacement of the cylindrical filter screen; a cabinet mounting bracket is also fixedly installed on the cabinet shell.

[0011] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention constructs a multi-level heat conduction and heat dissipation path through the heat-conducting cabinet layer, condensation fins and outer heat dissipation fins, so that the heat generated by the power grid distribution device can be rapidly diffused from point concentration to surface distribution, and then carried away by airflow convection and phase change heat dissipation, thereby avoiding the problem of local hot spot accumulation in traditional distribution cabinets. In particular, the setting of the heat-conducting cabinet layer allows the heat to diffuse laterally within the structural layer, effectively reducing the local temperature rise gradient of the device, improving the overall thermal stability, delaying device aging and reducing the risk of thermal runaway; (2) The present invention constructs a negative pressure sealed cavity between the heat-conducting cabinet layer and the condensation fins, and fills it with deionized water or electronic fluorinated liquid, so that the system forms an evaporation-condensation cycle phase change heat dissipation mechanism. Utilizing the latent heat characteristics of the working fluid, a large amount of heat transfer can be achieved under low temperature difference conditions, which is more efficient than the single air convection heat dissipation method; (3) The present invention adopts a rotatable cylindrical filter structure, which rotates continuously under the action of the drive motor, so that the particles attached to the filter surface are detached under the action of centrifugal force, avoiding ventilation blockage caused by dust accumulation. Compared with the traditional fixed filter, it can extend the cleaning cycle and maintain stable air circulation capacity, thereby ensuring that the heat dissipation system is in a high-efficiency operating state for a long time, while reducing the maintenance frequency and improving the reliability of equipment operation; (4) The present invention sets three dry powder fire extinguishing gas canisters with different production dates, and combines temperature sensors and graded triggering logic to realize the time redundancy and performance redundancy of the fire extinguishing system. When the performance of a certain gas canister deteriorates or the response is insufficient, the subsequent gas canister can automatically take over the discharge, avoiding the failure of a single fire extinguishing unit leading to the failure of the overall protection. Meanwhile, by prioritizing the use of gas cylinders nearing their expiration date, resource utilization is improved and maintenance risks are reduced, forming a fire extinguishing support system with self-diagnostic capabilities; (5) During the fire extinguishing process, the release of dry powder will generate instantaneous high pressure. A passive rapid pressure relief structure is formed by the magnetic bottom protective mesh cover and the cylindrical filter screen. When the internal pressure exceeds the threshold, the magnetic structure automatically disengages, forming a rapid pressure relief channel, thereby preventing structural damage to the cabinet shell and the heat-conducting cabinet layer due to overpressure. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0013] Figure 2 This is a schematic diagram showing the installation position of the outer heat dissipation fins of the present invention.

[0014] Figure 3 This is a schematic diagram of the air pressure fan structure of the present invention.

[0015] Figure 4 This is a schematic diagram of the structure of the door panel of the present invention.

[0016] Figure 5 This is a schematic diagram of the heat-conducting cabinet layer structure of the present invention.

[0017] Figure 6 This is a schematic diagram of the cylindrical filter screen structure of the present invention.

[0018] In the diagram: 101 - Cabinet outer shell; 102 - Magnetic rotating ring support plate; 103 - Magnetic rotating ring; 104 - Drive pulley; 105 - Transmission belt; 106 - Drive motor; 107 - Cylindrical filter screen; 108 - Circular through hole; 109 - Rectangular through hole; 110 - Bottom protective mesh cover; 201 - Condensation fins; 202 - Heat-conducting cabinet layer; 203 - Sloping surface; 204 - Component fixing row; 205 - Top air guide cover; 206 - Air pressure fan; 207 - Air pressure fan air guide cover; 208 - Exhaust nozzle; 209 - Outer heat dissipation fins; 210 - Membrane plate; 301 - Door panel; 302 - UPS backup power supply; 303 - Fire extinguishing gas cylinder bracket; 304 - Dry powder fire extinguishing gas cylinder; 305 - Electric valve; 306 - Nozzle; 307 - Sealing gasket; 401 - Cabinet mounting bracket. Detailed Implementation

[0019] The following is in conjunction with the appendix Figures 1-6 The technical solution of the present invention will be further illustrated through specific embodiments.

[0020] This invention provides an all-weather protection distribution cabinet with fault self-diagnosis and redundant fire extinguishing triggering, including a cabinet shell 101, condenser fins 201, a heat-conducting cabinet layer 202, a component fixing bar 204, and three dry powder fire extinguishing gas canisters 304 with different production dates. The production dates of the three dry powder fire extinguishing gas canisters 304 are approximately two years apart; for example, the production dates of the three dry powder fire extinguishing gas canisters 304 are January 1, 2021, February 5, 2023, and January 17, 2025, respectively. This effectively reduces the probability of the dry powder fire extinguishing gas canisters 304 expiring and requiring replacement. After replacing and installing the dry powder fire extinguishing gas canisters 304, a timer system is used to time the expiration date of the dry powder fire extinguishing gas canisters 304. When the dry powder fire extinguishing gas canisters 304 have six months left before their expiration date, the system issues an early warning to replace the dry powder fire extinguishing gas canisters 304. The heat-conducting cabinet layer 202 is fixedly attached to the inner wall of the cabinet shell 101. The top of the inner wall of the heat-conducting cabinet layer 202 is fixedly equipped with condenser fins 201, and the condenser fins 201 and the interior of the heat-conducting cabinet layer 202 are hollow and interconnected. Multiple rows of device fixing rows 204 are fixed on the inner wall of the heat-conducting cabinet layer 202. The device fixing rows 204 are used to install power grid distribution devices. Multiple temperature sensors are also provided on the inner side of the heat-conducting cabinet layer 202 to monitor the temperature of the power grid distribution devices installed on the device fixing rows 204. The upper and lower surfaces of the cabinet shell 101 are respectively provided with air pressure fans 206 for driving airflow inside the cabinet shell 101 and cylindrical filters 107 for filtering air impurities. A bottom protective mesh cover 110 is provided on the outside of the cylindrical filter screen 107. The bottom protective mesh cover 110 is magnetically fixed to the bottom of the cabinet shell 101, which facilitates the replacement of the cylindrical filter screen 107. A cabinet mounting bracket 401 is also fixedly installed on the cabinet shell 101.

[0021] Furthermore, the multiple temperature sensors are not merely used for simple temperature acquisition, but form a multi-point discrete sensing network for the thermal field distribution inside the cabinet shell 101. By synchronously sampling the temperature gradients at different heights, in different areas, and at different device installation locations, local hot spots, heat accumulation areas, and abnormal temperature rise diffusion paths can be identified. This allows for recording the heat evolution trend rather than a single instantaneous temperature value, providing a reference for subsequent power grid load scheduling and optimization. After the thermally conductive cabinet layer 202 forms a thermal coupling interface with the cabinet shell 101, it can redistribute the heat conducted down from the device mounting bar 204, transforming the heat from point concentration to surface diffusion. Then, through the condensation fins 201 and the outer heat dissipation fins 209, the heat is released to the external environment in a cascade manner, thereby giving the heat dissipation process a higher thermal inertia buffering capacity and temperature control stability. When the air pressure fan 206 operates in negative pressure suction mode, it can not only form a directional airflow channel from bottom to top, but also create a continuously updated boundary layer flow field inside the cabinet shell 101, reducing the stagnation time of hot air on the device surface and further improving the convective heat transfer coefficient. The cylindrical filter 107 plays a role in particle classification and interception in this process. Its pore structure can mechanically block external dust, fibers and insect particles while ensuring ventilation, and prevent pollutants from depositing on electrical surfaces to form insulating creepage channels or thermal resistance layers, thereby improving long-term operational reliability.

[0022] The hollow interconnected structure inside the condenser fins 201 and the heat-conducting cabinet layer 202 is designed with a negative pressure environment, and deionized water / electronic fluorinated liquid is placed inside the hollow interconnected structure. The bottom edge of the condenser fins 201 is designed with symmetrically arranged inclined surfaces 203, so that the middle height of the bottom edge of the condenser fins 201 is higher than the height of the two ends, which facilitates the condensate inside the condenser fins 201 to slide into the heat-conducting cabinet layer 202. The negative pressure interconnected structure inside the condenser fins 201 and the heat-conducting cabinet layer 202 is designed to use the pressure difference to lower the boiling point of the working fluid and enhance the phase change heat transfer response, so that the deionized water / electronic fluorinated liquid can evaporate and migrate under relatively low heat input conditions, thereby enhancing the heat transfer efficiency. When circulating in the closed cavity, not only can efficient heat absorption be achieved by relying on the latent heat of phase change, but also the gas-liquid conversion can be completed by utilizing the temperature gradient on the surface of the condenser fins 201, so that the heat absorbed from the device fixing row 204 and the heat-conducting cabinet layer 202 can be quickly transferred to the heat dissipation area at a lower temperature rise cost. Because the bottom edge of the condenser fins 201 is designed as a symmetrical inclined plane 203, the condensate will converge and flow back along both sides under the action of gravity, reducing droplet retention and local liquid accumulation, and preventing the formation of a thermal resistance barrier after the condensate covers the heat exchange surface of the fins. This ensures that the fin surface is continuously exposed to an effective heat exchange state, making the evaporation-condensation-reflux phase change cycle more stable and continuous. At the same time, the electrical insulation properties of deionized water / electronic fluorinated liquid can prevent the internal working fluid from generating secondary electrical conductivity to the electrical environment, ensuring that even under conditions of local leakage or thermal fluctuation, the interior of the heat-conducting cabinet layer 202 can still maintain a high safety boundary.

[0023] A circular through hole 108 is provided at the bottom of the cabinet shell 101. A cylindrical filter screen 107 is rotatably disposed in the circular through hole 108. A magnetic rotating ring support plate 102 is fixedly installed on the bottom of the inner wall of the cabinet shell 101. A magnetic rotating ring 103 is rotatably installed on the magnetic rotating ring support plate 102. The top edge of the cylindrical filter screen 107 is magnetically attracted to the magnetic rotating ring 103, and a sealing rubber ring is provided on the contact surface between the cylindrical filter screen 107 and the magnetic rotating ring 103. A drive motor 106 is also fixedly installed on the cabinet shell 101. A drive pulley 104 is fixedly installed on the output shaft of the drive motor 106. The drive pulley 104 and the magnetic rotating ring 103 are connected by a transmission belt 105.

[0024] A rectangular through hole 109 is provided on the top of the cabinet shell 101. The condenser fins 201 are aligned with the rectangular through hole 109. A pneumatic fan duct cover 207 is provided on the rectangular through hole 109. The pneumatic fan duct cover 207 is fixedly installed on the cabinet shell 101. The pneumatic fan 206 is rotatably installed inside the pneumatic fan duct cover 207. A top duct cover 205 is fitted on the outside of the pneumatic fan duct cover 207. The top duct cover 205 is fixedly installed on the cabinet shell 101. Exhaust nozzles 208 are provided on both sides of the top duct cover 205. External heat dissipation fins 209 are fixedly installed on both symmetrical surfaces of the outer surface of the cabinet shell 101. The external heat dissipation fins 209 are heat-conductingly connected to the heat-conducting cabinet layer 202 through the body of the cabinet shell 101. Each external heat dissipation fin 209 is covered with a thin film plate 210 on its side. The top of the external heat dissipation fin 209 passes through an exhaust nozzle 208, so that the airflow blown out by the exhaust nozzle 208 passes through the external heat dissipation fin 209. A door panel 301 is also movably installed on the cabinet shell 101. Three dry powder fire extinguishing gas cylinders 304 are fixedly installed inside the door panel 301 through fire extinguishing gas cylinder brackets 303 (for easy disassembly and replacement later). Each dry powder fire extinguishing gas cylinder 304 has a nozzle 306 connected to its exhaust port through an electric valve 305. The nozzle 306 points towards the power distribution device on the inside of the heat-conducting cabinet layer 202. A UPS backup power supply 302 is also fixedly installed inside the door panel 301; a sealing gasket 307 is fixedly installed on the cabinet shell 101 at the mating surface with the door panel 301. The sealing gasket 307 is used to improve the sealing performance of the door panel 301 when it is closed on the cabinet shell 101.

[0025] Secure the required power grid distribution components to the component mounting bracket 204 (the cabinet outer shell 101 and the heat-conducting cabinet layer 202 are provided with through holes for cable threading; the cables connected to the component mounting bracket 204 pass through these through holes, and after installing the component mounting bracket 204, foam needs to be filled between the through holes and the cables to provide a seal and prevent insects and dust from entering the cabinet outer shell 101). Then close the door panel 301 and secure the door panel 301 and the cabinet outer shell 101 with locks to prevent unauthorized personnel from opening it. When the power grid distribution components are operating normally or under high current loads, they generate a large amount of heat. If this heat is too high, it can cause fire or even deflagration, and it will also accelerate the aging of the power grid distribution components. At this time, the air pressure fan 206 can be turned on. The air pressure fan 206 drives the airflow, which will cause the pressure inside the cabinet shell 101 to be lower than the external pressure. This means that the external air passes through the bottom protective mesh cover 110 and the cylindrical filter screen 107 in sequence and enters the cabinet shell 101. Then the airflow passes through the power grid distribution device installed on the device fixing row 204, which carries away the heat on its surface. Finally, it flows out to the outside of the cabinet shell 101 through the condenser fins 201, the air pressure fan 206, the exhaust nozzle 208, and the outer heat dissipation fins 209. The main purpose is to carry away the hot air accumulated inside the cabinet shell 101.

[0026] The heat generated by the power grid distribution devices is also transferred directly to the heat-conducting cabinet layer 202 through the device fixing busbar 204 or the power grid distribution device itself. This heats the deionized water / electronic fluorinated liquid inside the heat-conducting cabinet layer 202. After evaporating due to heat, the deionized water / electronic fluorinated liquid moves to the condenser fins 201, where it condenses the evaporated gas. The condensed liquid falls back into the heat-conducting cabinet layer 202 and reabsorbs heat. The heat absorbed by the heat-conducting cabinet layer 202 from the evaporated gas is carried away by the flowing air, thus dissipating heat from the condenser fins 201. The airflow is ultimately ejected through exhaust nozzle 208. The airflow at the injection point moves horizontally, and exhaust nozzle 208 has a narrow opening to increase the velocity of the air ejected through it. The air ejected from exhaust nozzle 208 passes over the outer heat dissipation fins 209. Due to the lower pressure at higher velocity points, the pressure at the junction of the outer heat dissipation fins 209 and the air ejected from exhaust nozzle 208 is lower than at other locations. At this point, the air in the gaps inside the outer heat dissipation fins 209 flows towards exhaust nozzle 208, thus dissipating heat from the entire outer heat dissipation fins 209. The heat from the outer heat dissipation fins 209 is absorbed from the heat-conducting cabinet layer 202 itself. Combined with the condenser fins 201, this achieves cooling of the condenser fins 201, the heat-conducting cabinet layer 202, and all the power distribution devices installed on the device mounting bracket 204. The specific speed of the air pressure fan 206 is controlled by the value monitored by the temperature sensor; the higher the temperature, the faster the speed of the air pressure fan 206.

[0027] To prevent external dust from entering the cabinet housing 101, and specifically to prevent dust from adhering to the surface of the power grid distribution components and affecting their heat dissipation, a cylindrical filter 107 is installed to filter the air entering the cabinet housing 101. Traditional cylindrical filters 107 are fixed, and dust in the air easily adheres to their surface and cannot fall off, reducing their permeability over time. This distribution cabinet rotates the cylindrical filter 107. Specifically, when the drive motor 106 is started, the output shaft of the drive motor 106 drives the drive pulley 104 to rotate. The drive pulley 104 drives the magnetic rotating ring 103 to rotate through the transmission belt 105. The magnetic rotating ring 103 drives the cylindrical filter 107 to rotate. The rotation of the cylindrical filter 107 will cause the dust particles on the surface (for larger diameter particles) to rotate with it. The centrifugal force on these dust particles is away from the cylindrical filter 107, which reduces the adhesion of dust particles to the circumferential surface of the cylindrical filter 107, thereby alleviating the accumulation of dust on the surface of the cylindrical filter 107.

[0028] When any temperature sensor detects that the temperature exceeds the threshold, indicating that a power grid distribution device has exploded or caught fire, the system opens the electric valve 305 corresponding to the dry powder extinguishing gas canister 304 with the earliest valid date. The dry powder inside the canister 304 is then sprayed out through the nozzle 306 to extinguish and cool the power grid distribution device. If the temperature sensor does not detect a significant temperature drop (temperature reduction less than 50%) within 30 seconds, the electric valve 305 corresponding to the dry powder extinguishing gas canister 304 with the second earliest valid date is activated, and the fire extinguishing of the power grid distribution device continues. In addition to the power supply from the power grid itself, the control system is also equipped with an additional UPS backup power supply 302. The three sets of dry powder extinguishing gas canisters 304 with different production dates are not simply configured for quantity redundancy, but rather form a staggered lifespan layout in the time dimension, creating a gradient distribution of different canisters 304 in terms of validity period, pressure decay rate, and trigger priority. With this setup, even if a single gas cylinder 304 experiences extinguishing agent clumping, decreased driving pressure, or slower valve response due to prolonged storage time, subsequent gas cylinders 304 can still take over to complete the discharge, thus preventing the system from losing its extinguishing capability due to a single point of failure at critical moments. The system's priority call logic after a temperature anomaly is actually based on a graded response according to the temperature rise curve: if the temperature only rises abnormally for a short time, the gas cylinder 304 closest to its expiration date is used first to perform extinguishing, ensuring that the extinguishing resources with the highest risk of aging are consumed first, while maintaining the backup integrity of the remaining gas cylinders 304; if the temperature drop after the first discharge does not meet the threshold, it indicates that the combustion has developed continuous heating characteristics, and the second gas cylinder 304 is immediately called in, which can achieve superimposed extinguishing efficiency by covering the fire source area again, filling the oxygen isolation layer, and suppressing reignition. During this process, the UPS backup power supply 302 acts as an emergency control power supply independent of the main power supply circuit. Its surface is covered with an aerogel heat insulation layer, which can ensure that even if the external power grid is cut off after a fire, the temperature sensor, control module and electric valve 305 can still complete the complete action chain, avoiding the failure of the fire extinguishing system due to the failure of the main power supply.

[0029] Because a large amount of gas is released from the dry powder fire extinguishing gas canister 304, the pressure inside the cabinet shell 101 will increase instantaneously. Therefore, this pressure needs to be released quickly. This distribution cabinet uses a magnetically attached bottom protective mesh cover 110 and cylindrical filter screen 107, located at the bottom of the cabinet shell 101. When the internal pressure of the cabinet shell 101 increases instantaneously, the magnetic force is overcome, and the cylindrical filter screen 107 and bottom protective mesh cover 110 spring open, instantly removing the obstruction to the circular through-hole 108 at the bottom of the cabinet shell 101. This releases the internal pressure of the cabinet shell 101, preventing damage to the cabinet shell 101 and the heat-conducting cabinet layer 202 due to excessive pressure. The bottom protective mesh cover 110 and cylindrical filter screen 107 employ a magnetic release structure, forming an adaptive safety valve that balances sealing performance and pressure relief response speed. Under normal operating conditions, the magnetic attraction provides sufficient suction force to keep the bottom circular through-hole 108 closed, thereby preventing external dust, insects, and moisture from entering the cabinet shell 101. However, when dry powder is discharged or internal combustion causes instantaneous overpressure, the pressure surge from the internal gas exceeds the magnetic holding force, causing the bottom protective mesh cover 110 and the cylindrical filter 107 to open rapidly, forming the shortest path pressure relief channel. The advantage is that it can complete the passive response without additional electronic control, releasing internal pressure in milliseconds or near instantaneous times, reducing the peak structural stress on the cabinet shell 101, the heat-conducting cabinet layer 202, and the door panel 301.

Claims

1. A 24 / 7 protection distribution cabinet with self-diagnosis of faults and redundant fire suppression triggering, characterized in that: It includes a cabinet shell (101), condenser fins (201), a heat-conducting cabinet layer (202), a device mounting bar (204), and three dry powder fire extinguishing gas canisters (304) with different production dates. The heat-conducting cabinet layer (202) is fixedly attached to the inner wall of the cabinet shell (101). The top of the inner wall of the heat-conducting cabinet layer (202) is fixedly provided with condensing fins (201). The condensing fins (201) and the interior of the heat-conducting cabinet layer (202) are hollow and connected. Multiple rows of device fixing rows (204) are fixed on the inner wall of the heat-conducting cabinet layer (202). The device fixing rows (204) are used to install power grid distribution devices. The inner side of the heat-conducting cabinet layer (202) is also equipped with multiple temperature sensors to monitor the temperature of the power grid distribution devices installed on the device fixing row (204); The upper and lower surfaces of the cabinet shell (101) are respectively provided with a pneumatic fan (206) for driving airflow inside the cabinet shell (101) and a cylindrical filter screen (107) for filtering air impurities.

2. The all-weather protection distribution cabinet with fault self-diagnosis and redundant fire suppression triggering as described in claim 1, characterized in that: The hollow interconnected structure inside the condenser fins (201) and the heat-conducting cabinet layer (202) is set with a negative pressure environment, and deionized water / electronic fluorinated liquid is installed inside the hollow interconnected structure. The bottom edge of the condenser fin (201) adopts a symmetrically arranged slope (203), so that the middle height of the bottom edge of the condenser fin (201) is higher than the height of the two ends, which makes it easier for the condensed water in the condenser fin (201) to slide into the heat-conducting cabinet layer (202).

3. The all-weather protection distribution cabinet with fault self-diagnosis and redundant fire suppression triggering as described in claim 2, characterized in that: A circular through hole (108) is provided at the bottom of the cabinet shell (101). A cylindrical filter screen (107) is rotatably installed in the circular through hole (108). A magnetic rotating ring support plate (102) is fixedly installed at the bottom of the inner wall of the cabinet shell (101). A magnetic rotating ring (103) is rotatably installed on the magnetic rotating ring support plate (102). The top edge of the cylindrical filter screen (107) is magnetically attracted to the magnetic rotating ring (103). A sealing rubber ring is provided on the contact surface between the cylindrical filter screen (107) and the magnetic rotating ring (103).

4. The all-weather protection distribution cabinet with fault self-diagnosis and redundant fire suppression triggering as described in claim 3, characterized in that: A rectangular through hole (109) is provided on the top of the cabinet shell (101), wherein the condenser fins (201) are aligned with the rectangular through hole (109), and a gas pressure fan guide hood (207) is provided on the rectangular through hole (109). The gas pressure fan guide hood (207) is fixedly installed on the cabinet shell (101), wherein the gas pressure fan (206) is rotatably installed inside the gas pressure fan guide hood (207), and a top guide hood (205) is fitted on the outside of the gas pressure fan guide hood (207). The top guide hood (205) is fixedly installed on the cabinet shell (101), and exhaust nozzles (208) are provided on both sides of the top guide hood (205).

5. The all-weather protection distribution cabinet with fault self-diagnosis and redundant fire suppression triggering as described in claim 4, characterized in that: On both sides of the outer surface of the cabinet shell (101), external heat dissipation fins (209) are fixedly installed. The external heat dissipation fins (209) are thermally connected with the heat-conducting cabinet layer (202) through the cabinet shell (101) body. Each side of the external heat dissipation fin (209) is covered with a thin film plate (210). The top of the external heat dissipation fins (209) passes through the exhaust nozzle (208), so that the airflow blown out by the exhaust nozzle (208) passes through the external heat dissipation fins (209).

6. The all-weather protection distribution cabinet with fault self-diagnosis and redundant fire suppression triggering as described in claim 5, characterized in that: A door panel (301) is also movably installed on the cabinet shell (101). Three dry powder fire extinguishing gas cylinders (304) are fixedly installed inside the door panel (301) through fire extinguishing gas cylinder brackets (303). Each dry powder fire extinguishing gas cylinder (304) has a nozzle (306) connected to its exhaust port through an electric valve (305). The nozzle (306) faces the power grid distribution device inside the heat-conducting cabinet layer (202).

7. The all-weather protection distribution cabinet with fault self-diagnosis and redundant fire suppression triggering as described in claim 6, characterized in that: A UPS backup power supply (302) is also fixedly installed inside the door panel (301); a sealing gasket (307) is fixedly installed on the cabinet shell (101) at the mating surface with the door panel (301). The sealing gasket (307) is used to improve the sealing performance of the door panel (301) when it is closed on the cabinet shell (101).

8. The all-weather protection distribution cabinet with fault self-diagnosis and redundant fire suppression triggering as described in claim 7, characterized in that: A bottom protective mesh cover (110) is provided on the outside of the cylindrical filter screen (107). The bottom protective mesh cover (110) is magnetically fixed to the bottom of the cabinet shell (101) to facilitate the replacement of the cylindrical filter screen (107). A cabinet mounting bracket (401) is also fixedly installed on the cabinet shell (101).

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