Electric power construction electric power fireproof protection device

Abstract

This invention discloses a fire protection device for power construction, comprising: a cabinet, a heat dissipation device, and a fire extinguishing device. The cabinet has a receiving cavity and a heat dissipation vent connecting the receiving cavity to the external environment. The heat dissipation device includes a housing and a fan. The housing is located at the heat dissipation vent, with its opposite ends extending through to connect the receiving cavity to the external environment. The fan is located within the housing. The fire extinguishing device is located within the receiving cavity and has a storage chamber. The fire extinguishing device includes a nozzle, a smoke sensor, and a temperature sensor, with the nozzle facing the high-temperature portion of the power equipment during operation. The heat dissipation vent on the cabinet maintains communication between the receiving cavity and the external environment, enabling timely dissipation of heat generated during operation. When the fan of the heat dissipation device operates, it actively introduces low-temperature outside air into the receiving cavity, forcing the hot air inside the cavity to escape, thus creating forced convection circulation. The storage chamber of the fire extinguishing device is pre-filled with extinguishing agent. In the event of a fire, the nozzle releases the extinguishing agent to the high-temperature area to suppress the initial fire.

Description

Technical Field

[0001] This invention relates to the field of protection device technology, and in particular to a power fire protection device for power construction. Background Technology

[0002] Electrical fire protection devices are active fire-fighting equipment used to automatically cut off faulty power supplies or isolate ignition sources in the initial stages of a fire, thereby intervening at the source of electrical fires. This device is a core component in the intersection of electrical safety and fire safety, transforming the management of electrical fires from reactive response to proactive prevention.

[0003] Chinese invention CN114914813A discloses a power fire protection device for electrical construction. Its working principle is mainly based on a physical deformation triggering mechanism: when the temperature inside the junction box rises abnormally due to a short circuit or aging of the wires, the built-in deformation component undergoes physical deformation upon heating. This deformation, in turn, drives the shearing component through a flexible tensioning member to perform a mechanical cutting operation, thereby severing the wire at the point of fire to prevent the fire from spreading. However, it has the limitation of a relatively delayed response mechanism, requiring the fire to have already occurred and the temperature to rise significantly before triggering its action. It cannot provide early warning or proactive intervention in the early stages of abnormal electrical parameters, making it difficult to fundamentally suppress the formation of a fire. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a power construction fire protection device that fundamentally inhibits the formation of fires.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A power construction fire protection device, comprising:

[0007] The cabinet has a receiving cavity for accommodating electrical equipment, and the cabinet is provided with a heat dissipation vent that connects the receiving cavity to the external environment;

[0008] A heat dissipation device, comprising a housing and a fan, wherein the housing is disposed at the heat dissipation port, and the opposite ends of the housing extend through to connect the receiving cavity and the external environment; the fan is disposed in the housing and is used to drive gas from the external environment into the receiving cavity.

[0009] A fire extinguishing device is disposed in the receiving cavity. The fire extinguishing device has a storage chamber for containing fire extinguishing agent. The fire extinguishing device includes a nozzle, a smoke sensor, and a temperature sensor. The nozzle is directed toward the part of the electrical device that has a high temperature during operation. The nozzle is used to spray the fire extinguishing agent in the storage chamber toward the point of ignition. The smoke sensor is used to detect whether there is smoke in the receiving cavity. The temperature sensor is used to detect the temperature in the receiving cavity. The nozzle is configured to perform an action based on feedback information from both the smoke sensor and the temperature sensor.

[0010] Furthermore, the heat dissipation device also includes a filter screen, which is disposed in the housing and located in the gas flow path. The filter screen is used to intercept dust, and the filter screen and the fan are arranged sequentially along the gas flow direction.

[0011] Furthermore, the heat dissipation device is also provided with multiple grid plates, all of which are rotatably mounted on the housing. The filter, the fan, and the grid plates are arranged sequentially along the gas flow direction, and the grid plates are used to change the airflow direction or close the airflow passage.

[0012] Furthermore, the fire extinguishing device also includes a high-pressure gas cylinder and a fire extinguishing agent storage box. The high-pressure gas cylinder is located at the bottom of the receiving cavity, and the fire extinguishing agent storage box is located at the top of the receiving cavity. The storage cavity is located within the fire extinguishing agent storage box. The high-pressure gas cylinder and the fire extinguishing agent storage box are connected by a connecting pipe. The connecting pipe is equipped with a valve, which is used to control the opening and closing of the connecting pipe.

[0013] Furthermore, the fire extinguishing device also includes a magnetic snap fastener, which is used to fix the outer periphery of the high-pressure gas tank and can be magnetically connected to the side wall of the cabinet.

[0014] Furthermore, the side wall of the cabinet is provided with an exhaust port, which is located above the heat dissipation vent.

[0015] Furthermore, the outer wall of the cabinet is provided with a baffle plate, which is pivotally connected to the cabinet and can cover the airflow path of the exhaust port to prevent outside air from entering the receiving cavity.

[0016] Furthermore, a guide plate is pivotally connected to the bottom of the fire extinguishing agent storage box. The guide plate can be close to the bottom of the fire extinguishing agent storage box or parallel to the side wall of the cabinet. The guide plate is used to increase the path of the fire extinguishing agent overflowing from the exhaust port into the receiving cavity.

[0017] Furthermore, the bottom of the cabinet is provided with multiple cable passage holes, and each of the multiple cable passage holes is provided with a flame-retardant component, which is used to prevent the spread of fire.

[0018] Furthermore, the power construction fire protection device also includes a control system and a power supply. The control system is signal-connected to the smoke sensor and the temperature sensor, and electrically connected to the power source of the fan and the power source of the grid plate. The power supply is used to supply power to the control system when a fire occurs and the power is cut off.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. The cabinet has a receiving cavity for accommodating electrical equipment. The cabinet also has heat dissipation vents that connect the receiving cavity to the external environment. The receiving cavity provides a well-organized installation base for the electrical equipment, allowing for the centralized arrangement of heat-generating components such as wiring terminals and conductive circuits. This effectively reduces heat dissipation dead zones caused by messy wiring, creating favorable conditions for subsequent thermal management. The heat dissipation vents on the cabinet maintain communication between the receiving cavity and the external environment, enabling the timely dissipation of Joule heat and eddy current losses generated during operation. This prevents heat from continuously accumulating inside the cavity, thereby slowing down the carbonization process of the insulation layer and maintaining the dielectric strength of the electrical clearance.

[0021] 2. The heat dissipation device includes a housing and a fan. The housing is located at the heat dissipation vent, and the opposite ends of the housing extend through to connect the receiving cavity and the external environment. The fan is located within the housing and is used to drive air from the external environment into the receiving cavity. The heat dissipation device is positioned at the heat dissipation vent, and its housing forms a through airflow channel. When the fan is running, it actively introduces low-temperature external air into the receiving cavity, forcing the hot air inside the cavity to be expelled to form a forced convection circulation. This directly washes away the heat points on the surface of the electrical equipment to reduce the rate of temperature rise, significantly reducing the risk of insulation aging and heat accumulation caused by long-term overheating operation. From a heat source management perspective, it controls fire-inducing factors at the nascent stage.

[0022] 3. The fire extinguishing device is located within the containment cavity. The fire extinguishing device has a storage chamber for containing extinguishing agent. The fire extinguishing device includes a nozzle, a smoke sensor, and a temperature sensor. The nozzle is directed towards the high-temperature portion of the electrical equipment during operation. The nozzle is used to spray the extinguishing agent from the storage chamber towards the ignition point. The smoke sensor detects the presence of smoke within the containment cavity, and the temperature sensor detects the temperature within the containment cavity. The nozzle is configured to perform actions based on feedback information from both the smoke sensor and the temperature sensor. The fire extinguishing device is built into the containment cavity, whose storage chamber is pre-filled with extinguishing agent. The nozzle is directed towards the area with the highest temperature rise during operation. When the smoke sensor and temperature sensor detect abnormal fire characteristic parameters, the nozzle directionally releases the extinguishing agent to the high-temperature area. Through rapid cooling and coverage of the fire source, it achieves initial fire suppression before the flames spread, compensating for the last line of defense after thermal management failure. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the power construction fire protection device of the present invention;

[0024] Figure 2 for Figure 1 The structural diagram shown illustrates that the electrical fire protection device for power construction is in normal working condition.

[0025] Figure 3 for Figure 1 The partial sectional view shown indicates that the electrical fire protection device for power construction is in the extinguishing state.

[0026] In the diagram: 1. Cabinet; 2. Receiving cavity; 3. Heat dissipation vent; 4. Box; 5. Fan; 6. Storage cavity; 7. Nozzle; 8. Smoke sensor; 9. Filter screen; 10. Grid plate; 11. High-pressure gas tank; 12. Extinguishing agent storage box; 13. Connecting pipe; 14. Magnetic buckle; 15. Exhaust port; 16. Baffle; 17. Deflector plate; 18. Cable penetration hole; 19. Flame retardant component; 20. Cabinet door. Detailed Implementation

[0027] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0028] It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is described as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] See Figures 1-3 A preferred embodiment of the present invention provides a power construction fire protection device, comprising: a cabinet 1, a heat dissipation device, and a fire extinguishing device.

[0031] The cabinet 1 has a receiving cavity 2 for housing electrical equipment. The cabinet 1 is equipped with a heat dissipation vent 3, which connects the receiving cavity 2 to the external environment. The heat dissipation vent 3 on the cabinet 1 is used to promptly dissipate the Joule heat and eddy current loss heat generated by the electrical equipment during long-term operation to the outside of the cabinet, preventing heat from continuously accumulating inside the cavity. In the actual structure, the heat dissipation vent 3 can be set as a louvered grille, utilizing natural convection to achieve continuous heat dissipation while preventing external water droplets or foreign objects from splashing in. The heat dissipation vent 3 can also be equipped with a cooling fan, significantly improving heat exchange efficiency through forced convection to meet the heat dissipation requirements under high load conditions. The heat dissipation vent 3 can also be equipped with a linkage adjustment module consisting of a temperature sensor and an electric damper, automatically adjusting the ventilation opening according to the real-time temperature inside the cavity to achieve on-demand heat dissipation. Through the above structure, the heat dissipation vent 3 can promptly dissipate heat accumulated around the wiring points and conductive circuits, preventing high temperatures from accelerating the carbonization of the insulation layer or reducing the dielectric strength of the electrical gaps, thus effectively intervening before a thermal fault evolves into an open flame. The standardized layout provided by the cavity 2 for electrical equipment also reduces heat dissipation dead spots caused by messy wiring. Combined with the heat dissipation mechanism of the heat dissipation port 3, it ensures that the equipment operates stably within the allowable temperature rise range, and improves the reliability of fire protection from the perspective of heat source management and environmental control.

[0032] The heat dissipation device includes a housing 4 and a fan 5. The housing 4 is located at the heat dissipation port 3, with its opposite ends extending through to connect the receiving cavity 2 to the external environment. The fan 5 is located on the housing 4 and is used to drive air from the external environment into the receiving cavity 2. The housing 4 is fixedly installed at the heat dissipation port 3, with its opposite ends forming a through structure, allowing the receiving cavity 2 to form a communication path with the external environment through the internal channels of the housing 4. The fan 5 is mounted on the housing 4, and when it operates, it drives cooler air from the external environment through the housing 4 into the receiving cavity 2, forcing the hot air inside the cavity to be discharged from the other heat dissipation ports 3 or gaps, forming a circulating airflow. As a specific implementation, the housing 4 can be designed as a rectangular air duct structure, with guide ribs on its inner wall to reduce airflow resistance, allowing the incoming airflow to be evenly distributed to all areas of the receiving cavity 2. Depending on the installation method, the fan 5 can be an axial flow fan 5, whose airflow direction is parallel to the axis of the housing 4, suitable for straight duct scenarios to achieve high air volume delivery; or a centrifugal fan 5, whose airflow direction is turned 90 degrees, suitable for layouts with limited installation space or requiring changes in airflow path; or a dual-speed or stepless speed-regulating fan 5, which automatically adjusts its speed based on the internal temperature feedback to balance heat dissipation requirements and energy consumption. Through the above structure, the fan 5 actively introduces low-temperature air from the outside, directly flushing the heat points on the surface of the electrical equipment and replacing the heat accumulated inside the cavity, significantly reducing the risk of insulation aging and heat accumulation caused by continuous high-temperature operation, and improving the initiative of fire protection from the heat source intervention level.

[0033] The fire extinguishing device is located in the receiving cavity 2, and the fire extinguishing device has a storage cavity 6 for storing the fire extinguishing agent. The fire extinguishing device includes a nozzle 7, a smoke sensor 8, and a temperature sensor. The nozzle 7 is directed towards the high-temperature part of the electrical equipment during operation. The nozzle 7 is used to spray the fire extinguishing agent in the storage cavity 6 towards the ignition point. The smoke sensor 8 is used to detect whether there is smoke in the receiving cavity 2, and the temperature sensor is used to detect the temperature in the receiving cavity 2. The nozzle 7 is configured to perform actions based on the feedback information from both the smoke sensor 8 and the temperature sensor. The fire extinguishing device has a storage cavity 6 for storing the fire extinguishing agent, providing a medium source for subsequent release. The nozzle 7 can be set as a universal adjustable nozzle 7, whose spray angle can be flexibly adjusted according to the on-site wiring conditions to ensure that the fire extinguishing agent accurately covers areas with concentrated heat, such as wiring terminals; or it can be configured as a multi-hole atomizing nozzle 7 to disperse the fire extinguishing agent into fine particles to expand the coverage area and improve heat absorption efficiency; the nozzle 7 can also be linked with an electric valve, which opens instantly upon receiving a trigger signal to achieve rapid release. The smoke sensor 8 identifies a fire by monitoring the concentration of aerosol particles generated by combustion in the containment chamber 2, and can output a warning signal before visible smoke is generated. The temperature sensor determines whether the ignition threshold has been reached by collecting ambient temperature in real time or monitoring the temperature rise rate at a specific point. When the smoke sensor 8 detects combustion products or the temperature sensor detects an abnormal temperature rise, the fire extinguishing device triggers the nozzle 7 to release the extinguishing agent in the storage chamber 6 to the high-temperature area, rapidly reducing the local temperature and covering the fire source, thereby suppressing the initial fire before it spreads and improving the initiative of fire protection from the perspective of disaster intervention.

[0034] Working principle: The cabinet 1 has a cavity 2 to centrally house the electrical equipment. A heat dissipation vent 3 connects the cavity 2 to the external environment, allowing natural convection or forced ventilation to promptly dissipate the Joule heat and eddy current losses generated during equipment operation. This prevents heat buildup that could accelerate insulation carbonization or reduce dielectric strength of electrical gaps. A heat dissipation device is located at the heat dissipation vent 3, with airflow channels formed at both ends of the cabinet 4. When the fan 5 operates, it drives cool outside air into the cavity 2, forcing the hot air inside to exit through the remaining openings. This creates a directional circulating airflow that directly washes away heat generated on the surface of the electrical equipment, slowing down insulation aging and reducing the risk of heat accumulation from a heat source management perspective. The fire extinguishing device is also located inside the containment chamber 2, with a pre-filled extinguishing agent in its storage chamber 6. The nozzles 7 are directed towards areas with high temperature rise during operation, such as wiring terminals. The smoke sensor 8 identifies combustion products by monitoring aerosol particle concentration, and the temperature sensor determines the ignition threshold by collecting ambient temperature or temperature rise rate. When the sensor detects abnormal fire characteristic parameters, the fire extinguishing device triggers the nozzles 7 to release the extinguishing agent in a directed manner to the high-temperature area, achieving initial fire suppression through rapid cooling and covering the fire source. Through the basic heat dissipation of the heat exchange vent 3, the forced convection intervention of the heat dissipation device, and the active fire extinguishing intervention of the fire extinguishing device, the device can effectively intervene before a thermal failure evolves into an open flame and achieve rapid suppression in the early stages of fire, thus improving the reliability and proactivity of fire protection from both environmental control and disaster response perspectives.

[0035] Clearly, the enclosure 2 formed by cabinet 1 provides a well-organized installation foundation for electrical equipment, allowing for the centralized layout of heat-generating components such as wiring terminals and conductive circuits. This effectively reduces heat dissipation dead zones caused by messy wiring, creating favorable conditions for subsequent thermal management. The heat dissipation vents 3 on cabinet 1 maintain communication between the enclosure 2 and the external environment, enabling timely dissipation of Joule heat and eddy current losses generated during operation. This prevents heat from continuously accumulating within the enclosure, thereby slowing down the carbonization process of the insulation layer and maintaining the dielectric strength of the electrical gaps. The heat dissipation device is located at the heat dissipation vents 3, and its housing 4 forms a through-flow channel. When the fan 5 is running, it actively introduces low-temperature outside air into the enclosure 2, forcing the hot air inside the enclosure to escape, creating forced convection circulation. This directly washes away the heat-generating points on the surface of the electrical equipment, reducing the rate of temperature rise and significantly reducing the risk of insulation aging and heat accumulation caused by long-term overheating operation. From a heat source management perspective, this controls fire-inducing factors at the nascent stage. The fire extinguishing device is built into the receiving cavity 2, and its storage cavity 6 is pre-filled with extinguishing agent. The nozzle 7 is directed towards the part with a high temperature rise during operation. When the smoke sensor 8 and the temperature sensor detect abnormal fire characteristic parameters, the nozzle 7 releases the extinguishing agent in a directional manner to the high temperature area. Through rapid cooling and covering of the fire source, it achieves initial fire suppression before the flame spreads, making up for the last line of defense after thermal management failure.

[0036] In this embodiment, preferably, the heat dissipation device further includes a filter screen 9, which is disposed in the housing 4 and located in the gas flow path. The filter screen 9 is used to intercept dust, and the filter screen 9 and the fan 5 are arranged sequentially along the gas flow direction. The filter screen 9 is used to intercept dust, lint, and suspended particles in the air, preventing pollutants from entering the receiving cavity 2 with the airflow and adhering to the surface of the electrical equipment. The filter screen 9 can effectively block dust from accumulating on the surface of electrical components, preventing the formation of a heat insulation layer due to dust accumulation and thus preventing the reduction of insulation surface resistance or the formation of leakage current channels after dust becomes damp, thereby maintaining electrical clearance and creepage distance within a safe range. When the filtered and purified air participates in heat exchange, it will not reduce the heat dissipation efficiency due to carrying pollutants, ensuring that the forced convection introduced by the fan 5 always maintains good heat exchange capacity. This structure ensures the long-term stable operation of the heat dissipation device from the air source purification level, reduces the risk of insulation degradation and overheating caused by environmental dust, and further enhances the environmental adaptability of fire protection based on heat source management, improving the reliability and durability of the device in various construction sites.

[0037] In this embodiment, preferably, the heat dissipation device also includes multiple grid plates 10, all of which are rotatably mounted on the housing 4. The filter 9, the fan 5, and the grid plates 10 are arranged sequentially along the gas flow direction. The grid plates 10 are used to change the airflow direction or close the airflow passage. The grid plates 10 are used to change the airflow direction or completely close the airflow passage by changing the angle, thereby regulating the airflow entering the receiving cavity 2. In the actual structure, the grid plates 10 can be set as manually adjustable parallel blades, with multiple blades rotating synchronously through a linkage mechanism, guiding the airflow towards a specific heat-generating area according to the site layout requirements; or they can be set as an electrically controlled structure, with each blade independently equipped with a micro motor, automatically adjusting the deflection angle according to the temperature sensor feedback to achieve precise zoned air delivery; the grid plates 10 can also be assembled as a normally closed reset structure, which is kept closed by a torsion spring when the fan 5 is stopped, and automatically opened by wind pressure when the fan 5 is started, preventing external moisture or insects from flowing back into the receiving cavity 2 when the fan is stopped. In the event of a fire, the grid plate 10 is controlled to switch to the closed position, physically blocking the airflow path. This isolates external oxygen from entering the containment chamber 2, inhibiting the continued combustion reaction, and reduces the outward dissipation of extinguishing agent released by the fire extinguishing device, maintaining the concentration of extinguishing agent within the chamber to improve extinguishing efficiency. Through this structure, the grid plate 10 can direct the filtered and purified forced airflow to the main heat-generating parts such as the wiring terminals, preventing the disorderly diffusion of cold air within the chamber and reducing local heat exchange efficiency. Simultaneously, by closing the passage during a fire, it achieves suffocation extinguishing and agent preservation in synergy. This allows the heat dissipation device to not only have active ventilation capabilities but also environmental isolation functions during the fire response phase. It optimizes heat dissipation efficiency from the perspective of refined airflow management and improves the utilization effect of the extinguishing medium from the perspective of disaster control, achieving synergistic improvement in both heat source intervention and fire suppression in fire protection.

[0038] In this embodiment, preferably, the fire extinguishing device further includes a high-pressure gas cylinder 11 and a fire extinguishing agent storage box 12. The high-pressure gas cylinder 11 is located at the bottom of the receiving cavity 2, and the fire extinguishing agent storage box 12 is located at the top of the receiving cavity 2. The storage cavity 6 is located within the fire extinguishing agent storage box 12. The high-pressure gas cylinder 11 and the fire extinguishing agent storage box 12 are connected by a connecting pipe 13. The connecting pipe 13 is equipped with a valve for controlling the opening and closing of the connecting pipe 13. The high-pressure gas cylinder 11 is located at the bottom of the receiving cavity 2, where the ambient temperature is relatively low and the influence of heat from electrical equipment is minimal. This reduces the adverse effects of high temperature on the pressure inside the cylinder, maintains the pressure stability of the driving gas, and ensures sufficient spray power in the event of a fire. The fire extinguishing agent storage box 12 is located at the top of the receiving cavity 2, allowing the nozzle 7 to be positioned close to the high-temperature area of ​​the electrical equipment below, shortening the spray path and utilizing gravity to assist the fire extinguishing agent in covering downwards, thus improving the hit efficiency at the ignition point. The nozzle 7 can be a fire-fighting-specific temperature-controlled nozzle 7, which contains a temperature-sensing glass bulb or fusible alloy. It automatically ruptures and opens when the ambient temperature reaches a set threshold, achieving passive triggering. The valve on the connecting pipe 13 can use a redundant control method with a solenoid valve connected in parallel with the temperature-controlled nozzle 7. Even if the active electronic control signal fails, it can still be mechanically activated through the temperature-controlled nozzle 7. Through this structure, the separate placement of the high-pressure gas tank 11 and the extinguishing agent storage box 12 optimizes the operational reliability of the fire extinguishing device in terms of both thermal protection and spray efficiency. The introduction of the temperature-controlled nozzle 7 enables the system to maintain autonomous response capabilities even under extreme conditions such as power outages or sensor failures. The coordinated operation of all components ensures the rapid establishment of effective extinguishing agent spray in the initial stage of a fire, improving the success rate of suppressing initial fires.

[0039] In this embodiment, preferably, the fire extinguishing device further includes a magnetic snap fastener 14, which is used to fix the outer periphery of the high-pressure gas tank 11. The magnetic snap fastener 14 can be magnetically connected to the side wall of the cabinet 1. During assembly, the magnetic snap fastener 14 is fixed to the side wall of the cabinet 1 by magnetic attraction, eliminating the need for additional mounting holes or fasteners on the cabinet 1, simplifying the installation process of the high-pressure gas tank 11 and preserving the structural integrity of the cabinet 1. The clamping effect of the magnetic snap fastener 14 on the outer periphery of the high-pressure gas tank 11 can limit its displacement or shaking caused by vibration during transportation or operation, and prevent loosening or fatigue damage at the interface of the connecting pipe 13 due to repeated stress. When the high-pressure gas cylinder 11 needs to be replaced, the operator can directly overcome the magnetic attraction to remove the clip and the high-pressure gas cylinder 11 as a whole from the side wall of the cabinet 1, without disassembling other components or using special tools. This significantly shortens maintenance operation time and reduces disassembly difficulty. At the same time, the magnetic structure facilitates alignment and positioning, and can quickly restore the fixed state when installing a new gas cylinder, ensuring that the fire extinguishing device can be quickly put back into use after regular inspection or emergency replacement. Through the above structure, the magnetic clip 14 optimizes the arrangement of the high-pressure gas cylinder 11 in terms of installation convenience and fixed reliability, reducing the risk of leakage or structural damage caused by insecure fixing. At the same time, it provides operational convenience for the regular maintenance and replacement of the fire extinguishing device, enabling the fire extinguishing system to be replenished or replaced in a timely manner during long-term service, and always in an effective standby state.

[0040] In this embodiment, preferably, the side wall of the cabinet 1 is provided with an exhaust port 15, which is located above the heat dissipation port 3. The exhaust port 15 utilizes the physical property of hot air rising naturally to dissipate the heat generated during the operation of the electrical equipment from the upper part of the cavity, forming an upward convection circulation path together with the heat dissipation port 3 located below. In the actual structure, the exhaust port 15 can be configured as a louvered opening to prevent the entry of external foreign objects, or equipped with a one-way exhaust valve to allow airflow to exit in only one direction. Through the above structure, the exhaust port 15 can promptly discharge the hot air accumulated at the top of the receiving cavity 2, avoiding the cumulative effect of heat buildup caused by heat stagnation at the upper part of the cavity. Simultaneously, it works in conjunction with the heat dissipation port 3 and the heat dissipation device to form directional airflow for intake and exhaust, improving overall ventilation efficiency. After the fire extinguishing device is activated, the exhaust port 15 is positioned at the top of the receiving cavity 2. At this time, even if the grid plate 10 closes the airflow passage at the heat dissipation port 3, the exhaust port 15 can still serve as a micro-pressure release channel, preventing a sudden increase in cavity pressure from affecting the distribution of the extinguishing agent. Simultaneously, its high position makes it difficult for the denser extinguishing agent to quickly dissipate from here, extending the residence time of the extinguishing agent within the cavity. By separating the heat dissipation port 3 and the exhaust port 15 vertically, the cabinet 1 possesses the basic conditions for the coordinated operation of natural and forced convection, optimizing heat dissipation efficiency from an airflow organization perspective. Furthermore, during the fire response phase, it addresses both pressure relief and agent retention needs, enhancing the overall reliability and environmental adaptability of fire protection.

[0041] In this embodiment, preferably, a baffle 16 is provided on the outer wall of the cabinet 1. The baffle 16 is pivotally connected to the cabinet 1 and can cover the airflow path of the exhaust port 15 to prevent outside air from entering the receiving cavity 2. The baffle 16 has a unidirectional swinging working characteristic. When the air pressure inside the receiving cavity 2 is higher than that outside, the airflow is discharged outward, and the baffle 16 swings outward under the thrust to keep the exhaust passage unobstructed. When the airflow direction tends to reverse or the air pressure inside the cavity returns to normal, the baffle 16 falls back naturally under its own gravity and adheres to the side wall surface, so that the airflow path of the exhaust port 15 is physically blocked. With the above structure, the baffle 16 will not hinder the hot air from being discharged upward from the exhaust port 15 during normal heat dissipation, maintaining the bottom-up convection circulation efficiency. When the fan 5 stops running or the outside wind pressure is high, the baffle 16 can effectively prevent outside air carrying dust, moisture or insects from flowing back into the receiving cavity 2 through the exhaust port 15, reducing the risk of contaminant deposition and moisture on the surface of electrical components. After the fire extinguishing device is activated, the baffle 16 remains closed due to gravity, keeping the exhaust port 15 relatively sealed. This further isolates external oxygen from entering to inhibit continued combustion, and reduces the outward escape of the extinguishing agent from the upper exhaust path, extending the residence time of the extinguishing medium in the cavity and maintaining an effective extinguishing concentration. Through the vertical separation of the heat dissipation vent 3 and the exhaust port 15, and the one-way check valve function of the baffle 16, the cabinet 1 achieves environmental isolation during non-operational states and fire response phases while possessing efficient convection heat dissipation capabilities. This enhances the overall fire protection performance from the perspectives of airflow organization and sealing protection.

[0042] In this embodiment, preferably, a guide plate 17 is pivotally connected to the bottom of the extinguishing agent storage box 12. The guide plate 17 can be closely attached to the bottom of the extinguishing agent storage box 12 or parallel to the side wall of the cabinet 1. The guide plate 17 is used to increase the path of the extinguishing agent overflowing from the exhaust port 15 into the receiving cavity 2. When the fire extinguishing device is activated, the extinguishing agent is sprayed out at high speed from the nozzle 7 and diffuses in the receiving cavity 2. Some of the suspended or gaseous extinguishing agent may move towards the exhaust port 15 located at the top with the hot air flow or pressure fluctuation. At this time, the guide plate 17 in the deployed position forms a horizontal shielding barrier below the extinguishing agent storage box 12, forcing the upward flowing extinguishing agent to first hit the surface of the guide plate 17 before reaching the exhaust port 15, changing the direction of movement and falling back to the middle or bottom area of ​​the receiving cavity 2 along the plate surface, thereby extending the actual travel distance of the extinguishing agent from the generation position to the outlet of the exhaust port 15. Through the above structure, the deflector plate 17 increases the path length and flow resistance of the extinguishing agent without relying on additional power, so that more extinguishing medium can remain near the fire area to participate in flame suppression instead of rapidly flowing into the external environment. This maintains the effective coverage concentration and action time of the extinguishing agent in the containment chamber 2, and improves the resource utilization rate of the fire extinguishing device and the success rate of suppressing the initial fire from the perspective of loss control.

[0043] In this embodiment, preferably, the bottom of the cabinet 1 is provided with multiple cable passage holes 18, and each of the multiple cable passage holes 18 is provided with a flame-retardant component 19, which is used to prevent the spread of fire. The flame-retardant component 19 is used to seal the gap between the cable and the hole wall in the event of a fire to prevent the fire from spreading along the cable or spreading out of the cabinet through the hole. The flame-retardant component 19 can be a flexible flame-retardant rubber ring structure, whose inner edge is tightly fitted to the outer periphery of the cable, and expands and carbonizes under high temperature to form a dense heat insulation layer; or it can be a fireproof putty filling structure, which is directly embedded into the hole and compacted during construction to eliminate gaps; it can also be set as a mechanical fireproof sleeve, which has a built-in heat-expanding material, and its volume rapidly increases when the temperature rises to completely seal the hole. The flame-retardant component 19 maintains flexibility and plasticity under normal operating conditions, allowing the cable to pass through normally and with slight displacement without damaging the insulation layer, while effectively preventing dust and moisture from entering the receiving cavity 2 from the bottom. Under fire conditions, the flame-retardant component 19 expands or carbonizes rapidly upon heating, completely filling the gap between the cable and the hole wall, cutting off the path for flames and hot air to spread outward through the bottom hole, and simultaneously preventing external air from flowing into the containment cavity 2 from the bottom to aid combustion. The centralized arrangement of the cable penetration holes 18 at the bottom of the cabinet 1 ensures that all incoming and outgoing cables pass through the same fireproof sealing area, facilitating unified inspection and maintenance. Combined with the independently installed flame-retardant component 19 at each hole, a multi-channel fire barrier is formed in the bottom area. Through the cooperation of the cable penetration holes 18 and the flame-retardant component 19, the potential path for fire spread is blocked from the bottom of the cabinet 1, keeping the containment cavity 2 relatively sealed during fire. Together with the closed grid plate 10 at the heat dissipation vent 3, the closed baffle 16 at the exhaust vent 15, and the active suppression of the fire extinguishing device, a three-dimensional fire isolation system is formed, which works in concert from all directions to prevent the spread of fire and maintain the effective concentration of the extinguishing agent.

[0044] In this embodiment, preferably, a power construction fire protection device further includes a control system and a power supply. The control system is signal-connected to the smoke sensor 8 and the temperature sensor, and electrically connected to the power source of the fan 5 and the power source of the grid plate 10. The power supply is used to supply power to the control system when a fire occurs and the power is cut off. Under normal conditions, the control system automatically adjusts the start / stop and speed of the fan 5, as well as the opening angle or on / off state of the grid plate 10, based on the monitoring data from the temperature sensor or the smoke sensor 8, so that the heat dissipation device can adaptively ventilate according to the actual heat load inside the cavity. When the sensor detects that the fire characteristic parameters reach a set threshold, the control system immediately switches to the fire response mode, cuts off the power source of the fan 5 to prevent continuous air input, drives the grid plate 10 to close the airflow passage to isolate oxygen, and triggers the valve of the fire extinguishing device to open and release the extinguishing agent. When the main power supply is normal, the power supply is in a standby floating charging state. When a fire causes an external power grid outage or the main power supply line to burn out, the power supply automatically switches to power the control system. This ensures that the control system can still collect sensor signals, trigger fire extinguishing devices, and control the status of the grid plate 10 after a fire, preventing the entire unit from failing due to power failure. Through the centralized coordination of multiple components by the control system and the emergency backup provided by the power supply, heat dissipation, isolation, and fire extinguishing actions can be executed in an orderly manner according to preset logic during a fire. This avoids mutual interference between components due to disordered response timing. At the same time, it ensures that at least one complete fire extinguishing triggering process can still be completed under power failure conditions. From the perspectives of intelligent control and power supply reliability, this improves the determinism and survivability of the fire protection device in real fire scenarios.

[0045] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0047] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A power fire protection device for power construction, characterized in that, include: The cabinet (1) has a receiving cavity (2) for accommodating electrical equipment. The cabinet (1) is provided with a heat dissipation vent (3) that connects the receiving cavity (2) to the external environment. The heat dissipation device includes a box (4) and a fan (5). The box (4) is located at the heat dissipation port (3). The two ends of the box (4) pass through to connect the receiving cavity (2) and the external environment. The fan (5) is located in the box (4) and is used to drive the gas from the external environment into the receiving cavity (2). The fire extinguishing device is located in the containment cavity (2) and has a storage cavity (6) for containing fire extinguishing agent. The fire extinguishing device includes a nozzle (7), a smoke sensor (8), and a temperature sensor. The nozzle (7) is directed toward the part of the electrical device that is hot during operation. The nozzle (7) is used to spray the fire extinguishing agent in the storage cavity (6) toward the ignition point. The smoke sensor (8) is used to detect whether there is smoke in the containment cavity (2). The temperature sensor is used to detect the temperature in the containment cavity (2). The nozzle (7) is configured to perform an action based on the feedback information from both the smoke sensor (8) and the temperature sensor.

2. The power fire protection device for power construction according to claim 1, characterized in that, The heat dissipation device also includes a filter screen (9), which is located on the box body (4) and in the gas flow path. The filter screen (9) is used to intercept dust. The filter screen (9) and the fan (5) are arranged in sequence along the gas flow direction.

3. A power fire protection device for power construction according to claim 2, characterized in that, The heat dissipation device is also provided with multiple grid plates (10), and the multiple grid plates (10) are rotatably disposed on the box body (4). The filter screen (9), the fan (5) and the grid plates (10) are arranged in sequence along the gas flow direction. The grid plates (10) are used to change the airflow direction or close the airflow passage.

4. A power construction fire protection device according to claim 1, characterized in that, The fire extinguishing device also includes a high-pressure gas cylinder (11) and a fire extinguishing agent storage box (12). The high-pressure gas cylinder (11) is located at the bottom of the receiving cavity (2), and the fire extinguishing agent storage box (12) is located at the top of the receiving cavity (2). The storage cavity (6) is located in the fire extinguishing agent storage box (12). The high-pressure gas cylinder (11) and the fire extinguishing agent storage box (12) are connected by a connecting pipe (13). The connecting pipe (13) is equipped with a valve, which is used to control the opening and closing of the connecting pipe (13).

5. A power fire protection device for power construction according to claim 4, characterized in that, The fire extinguishing device also includes a magnetic buckle (14), which is used to fix the outer periphery of the high-pressure gas tank (11) and can be magnetically connected to the side wall of the cabinet (1).

6. A power fire protection device for power construction according to claim 1, characterized in that, The side wall of the cabinet (1) is provided with an exhaust port (15), which is located above the heat dissipation port (3).

7. A power fire protection device for power construction according to claim 6, characterized in that, The outer wall of the cabinet (1) is provided with a baffle (16), which is pivotally connected to the cabinet (1). The baffle (16) can cover the airflow path of the exhaust port (15) to prevent outside air from entering the accommodating cavity (2).

8. A power construction fire protection device according to claim 4 or 6, characterized in that, The bottom of the fire extinguishing agent storage box (12) is pivotally connected to a guide plate (17). The guide plate (17) can be close to the bottom of the fire extinguishing agent storage box (12) or parallel to the side wall of the cabinet (1). The guide plate (17) is used to increase the path of the fire extinguishing agent overflowing from the exhaust port (15) into the receiving cavity (2).

9. A power fire protection device for power construction according to claim 1, characterized in that, The bottom of the cabinet (1) is provided with multiple cable passage holes (18), and each of the multiple cable passage holes (18) is provided with a flame retardant component (19), which is used to prevent the spread of fire.

10. A power fire protection device for power construction according to claim 3, characterized in that, The electric fire protection device for power construction also includes a control system and a power supply. The control system is connected to the smoke sensor (8) and the temperature sensor. The control system is electrically connected to the power source of the fan (5) and the power source of the grid plate (10). The power supply is used to supply power to the control system when the power is cut off in case of fire.

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