A high-voltage carbon dioxide fire extinguishing device for emergency protection of electrical distribution cabinet circuits.

Abstract

This invention discloses a high-pressure carbon dioxide fire extinguishing device for emergency protection of electrical distribution cabinet circuits, comprising a bottom liquid storage tank and a top liquid storage vessel, which are connected by a liquid guiding channel; the fire extinguishing mechanism includes at least one diversion ring pipe connected to the top liquid storage vessel; a multi-dimensional adjustment component is connected to the diversion ring pipe and includes at least one rotating joint, a telescopic drive component, and a sliding guide component, which together drive the nozzle to achieve multi-dimensional position adjustment; a recycling component is connected to the bottom liquid storage tank for recovering unconsumed carbon dioxide. This invention achieves precise spray coverage of any fire source within the electrical distribution cabinet through the multi-dimensional adjustment component, eliminating fire extinguishing blind spots; and the recycling component filters and recycles unconsumed carbon dioxide, reducing extinguishing agent waste and providing an efficient and reliable solution for the fire safety of electrical distribution cabinet circuits.

Description

Technical Field

[0001] This invention relates to the field of electrical distribution cabinet safety protection technology, specifically a high-voltage carbon dioxide fire extinguishing device for emergency protection of electrical distribution cabinet circuits. Background Technology

[0002] High-voltage switchgear is the core circuit control equipment of the power system. The electrical components and lines densely arranged inside the cabinet are prone to fire due to circuit faults such as aging, short circuit, overload, and poor contact. Moreover, the internal space of the switchgear is enclosed and the circuit layout is complex. Fires are characterized by their suddenness and rapid spread. If they are not dealt with in time in the early stage, they can easily cause large-scale damage to the circuit system and even cause secondary safety accidents such as electric shock and explosion. Current fire prevention and emergency protection measures for electrical distribution cabinet circuits have many limitations. Traditional fire extinguishing methods rely on manual operation, which is not only slow to respond and difficult to seize the best opportunity to deal with the fire in its early stages, but also poses a great safety risk to manual operation due to the high-voltage and energized circuit environment. Existing gas fire extinguishing equipment is mostly a general-purpose pipeline design, lacking specific adaptation for the layout of electrical distribution cabinet circuits. The fire extinguishing agent spray coverage is uneven, and the fixed nozzle position cannot adjust the spray direction according to the location of the fire source in the circuit, which can easily create fire extinguishing dead zones, causing the local fire to continue to spread and damage more circuit components. At the same time, although high-pressure carbon dioxide is the preferred medium for extinguishing electrical distribution cabinet fires because it is non-conductive and has low corrosiveness to circuit equipment, current applications lack supporting automatic circuit fire sensing and precise spraying systems, which cannot achieve targeted emergency protection for electrical distribution cabinet circuits. Moreover, carbon dioxide is directly discharged after spraying and cannot be recovered. In case of accidental triggering or small-scale circuit fires, a large amount of fire extinguishing agent will be wasted, increasing the overall cost of circuit protection.

[0003] Therefore, this invention proposes a high-voltage carbon dioxide automatic fire extinguishing device adapted to the circuit structure of a power distribution cabinet, which enables accurate monitoring and emergency protection of circuit fires, curbs the spread of fires from the source, and effectively solves the aforementioned problems and difficulties. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a high-voltage carbon dioxide fire extinguishing device for emergency protection of distribution cabinet circuits, which solves the technical problems of fixed nozzle positions in traditional distribution cabinet fire extinguishing equipment, resulting in fire extinguishing blind spots and resource waste due to the inability to recover carbon dioxide.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-voltage carbon dioxide fire extinguishing device for emergency protection of distribution cabinet circuits, comprising a bottom liquid storage tank and a top liquid storage vessel, wherein the bottom liquid storage tank and the top liquid storage vessel are connected by a liquid guiding channel, and further comprising:

[0006] A fire extinguishing mechanism, the fire extinguishing mechanism including at least one diversion ring pipe connected to the top liquid storage tank;

[0007] A multi-dimensional adjustment component is connected to the diversion ring pipe and includes at least one rotating joint, a telescopic drive component, and a sliding guide component. The rotating joint, telescopic drive component, and sliding guide component together drive the nozzle to achieve multi-dimensional position adjustment.

[0008] And a recycling component, which is connected to the bottom liquid storage tank, for recovering unconsumed carbon dioxide.

[0009] Preferably, the liquid guiding channel includes a liquid guiding port fixedly connected to the top of the bottom liquid storage tank, a top guide port fixedly connected to the top of the liquid guiding port, an internal filter plate embedded in the inner wall of the top guide port, and a top mounting base fixedly connected to the top of the top guide port through a transmission port, and the top liquid storage tank is installed on the inner wall of the top mounting base.

[0010] Preferably, the top of the top liquid storage tank is fixedly connected to a liquid inlet, the top of the liquid inlet is hinged to a device base, and a sensor is installed on the top of the device base.

[0011] Preferably, the inner wall of the top liquid storage tank is fixed with a plurality of internal mounting rings, the inner walls of the plurality of internal mounting rings are fixedly connected with internal fixing frames, the inner walls of the internal fixing frames are all equipped with placement rings, and the tops of the plurality of placement rings are all connected with filter plates.

[0012] Preferably, the diversion ring tube is sleeved on the outer wall of the top liquid storage tank, and the outer walls of multiple diversion ring tubes are all penetrated by fixed tubes; the diversion ring tube near the bottom end is connected to the bottom liquid storage tank through a transfer pump.

[0013] Preferably, a second transmission pipe is fixedly connected to one side of the outer wall of the bottom-end diversion ring pipe, and a transmission pump is provided at the end of the second transmission pipe away from the diversion ring pipe. A first transmission pipe is fixedly connected to the input end of the transmission pump, and the end of the first transmission pipe away from the transmission pump is fixed to the outer wall of the bottom liquid storage tank.

[0014] Preferably, the multi-dimensional adjustment component includes a rotating section one and a rotating section two rotatably connected to the diversion ring pipe. The rotating section one and the rotating section two are connected by a rotating elbow one and a rotating elbow two. The end of the rotating elbow two is connected to a flexible hose through a guide plate. The end of the flexible hose is fixedly connected to a nozzle connecting seat. A sliding nozzle is installed on the nozzle connecting seat, and the nozzle connecting seat is slidably sleeved on a limiting sliding rod. A telescopic rod is connected to the top of the nozzle connecting seat, and the top of the telescopic rod is fixed to a fixed frame.

[0015] Preferably, a connecting pipe is fixedly connected to one side of the outer wall of each of the plurality of diversion ring pipes, and the end of the plurality of connecting pipes away from the diversion ring pipe is rotatably connected to the first rotating section, and the top end of the plurality of first rotating sections is provided with a cleaning port.

[0016] Preferably, the ends of the plurality of rotating elbows 1 away from the rotating joint 1 are rotatably connected to the rotating joint 2, and the ends of the rotating joint 2 away from the rotating elbows 1 are rotatably connected to the rotating elbow 2.

[0017] Preferably, the recycling component includes a reflux filter box fixedly connected to the outer wall of the bottom liquid storage tank, two reflux filter plates fixedly connected to the inner wall of the reflux filter box, a filter layer laid between the two reflux filter plates, and the reflux filter box communicating with the internal space of the power distribution cabinet for recovering unconsumed carbon dioxide; and / or, the filter plate installed in the top liquid storage tank and the internal filter plate embedded in the top guide port constitute a two-stage filtration system.

[0018] This invention provides a high-voltage carbon dioxide fire extinguishing device for emergency protection of electrical distribution cabinet circuits. It has the following beneficial effects:

[0019] This device, through the installation of multi-dimensional adjustment components, achieves precise spray coverage of any fire source within the distribution cabinet. Rotating sections one and two can rotate 360°, and together with the height adjustment of the telescopic rod and the lateral fine-tuning of the sliding nozzle along the limiting sliding rod, form a three-dimensional adjustment system. This allows the nozzle to precisely target any fire source within the distribution cabinet, achieving spraying without blind spots and completely eliminating the blind spots of traditional fixed nozzles. It can quickly suppress fires in their early stages, effectively preventing the fire from spreading along the circuit lines and maximizing the protection of electrical components and circuit systems within the distribution cabinet. Furthermore, the non-conductive nature of carbon dioxide prevents secondary damage to the circuitry during the extinguishing process, ensuring the safety of the distribution cabinet's circuitry.

[0020] This device constructs a carbon dioxide recycling system adapted to the emergency protection of electrical distribution cabinet circuits by incorporating recycling components. The return filter box, in conjunction with a double-layer liquid storage structure, ensures that unconsumed carbon dioxide after fire extinguishing is filtered and purified by the return filter plates and filter layers before flowing back to the bottom liquid storage tank for reuse. This significantly improves the extinguishing agent recovery rate, reduces extinguishing agent waste in routine fire protection of electrical distribution cabinet circuits, and lowers long-term protection costs. Simultaneously, a multi-stage filtration system (internal filter plates in the top inlet, filter plates in the top liquid storage tank, and return filter plates and filter layers in the return filter box) purifies the transported and recovered carbon dioxide layer by layer, effectively preventing impurities from clogging pipes, nozzles, and other core components. This ensures the long-term stable operation of the fire extinguishing device and prevents the failure of the electrical distribution cabinet's emergency fire protection due to equipment malfunction.

[0021] This device adopts a modular design, adaptable to the circuit layout and spatial characteristics of different power distribution cabinets. The bottom liquid storage tank, top liquid storage vessel, and fire extinguishing mechanism can be pre-assembled separately and then assembled on-site. Piping connections are simple, and the number and installation position of nozzles can be flexibly adjusted according to the circuit component layout of the power distribution cabinet, offering strong versatility. A cleaning port at the top of the rotating section allows for pipe maintenance without disassembling the entire structure, reducing equipment maintenance difficulty. Sensors can monitor the temperature and smoke concentration inside the power distribution cabinet in real time, enabling automatic detection of electrical fires and rapid activation of the fire extinguishing device. This makes the emergency protection of the power distribution cabinet circuits more timely and reliable, forming a complete fire protection closed loop from monitoring to extinguishing. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a schematic diagram of the multi-angle three-dimensional structure of the present invention;

[0024] Figure 3 This is a front view structural diagram of the present invention;

[0025] Figure 4 This is a schematic diagram of the bottom liquid storage tank connection structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the internal structure of the top liquid storage tank of the present invention;

[0027] Figure 6 This is a schematic diagram of the sliding nozzle connection structure of the present invention.

[0028] The components are as follows: 1. Bottom liquid storage tank; 2. Liquid guide port; 3. Top guide port; 4. Internal filter plate; 5. Transfer port; 6. Top mounting base; 7. Top liquid storage tank; 8. Liquid inlet; 9. Equipment base; 10. Sensor; 11. Internal mounting ring; 12. Filter plate; 13. Internal fixing frame; 14. Placement ring; 15. Transfer pipe one; 16. Transfer pump; 17. Transfer pipe two; 18. Diverting ring pipe; 19. Fixing pipe; 20. Connecting pipe; 21. Rotating joint one; 22. Cleaning port; 23. Rotating elbow one; 24. Rotating joint two; 25. Rotating elbow two; 26. Guide plate; 27. Hose; 28. Nozzle connection seat; 29. ​​Sliding nozzle; 30. Limiting sliding rod; 31. Telescopic rod; 32. Filter layer; 33. Return filter plate; 34. Fixing frame; 35. Return filter box. Detailed Implementation

[0029] 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.

[0030] Example 1

[0031] like Figures 1-6 As shown in the figure, this embodiment of the invention provides a high-pressure carbon dioxide fire extinguishing device for emergency protection of electrical distribution cabinet circuits, including a bottom liquid storage tank 1 and a top liquid storage tank 7, which are connected by a liquid guiding channel. The bottom liquid storage tank 1 serves as the main liquid storage container, storing a large amount of high-pressure carbon dioxide to provide sufficient extinguishing agent for fire extinguishing; the top liquid storage tank 7 is connected to the bottom liquid storage tank 1 through the liquid guiding channel, serving as an auxiliary liquid storage and buffer container to ensure a stable supply of carbon dioxide during fire extinguishing and avoid interruption of spraying due to pressure fluctuations.

[0032] Specifically, such as Figure 4 As shown, the liquid guiding channel includes a liquid guiding port 2 fixedly connected to the top of the bottom liquid storage tank 1. A top guiding port 3 is fixedly connected to the top of the liquid guiding port 2. An internal filter plate 4 is embedded in the inner wall of the top guiding port 3, and a top mounting base 6 is fixedly connected to the top of the top guiding port 3 through a transmission port 5. A top liquid storage tank 7 is installed on the inner wall of the top mounting base 6. The internal filter plate 4 embedded in the inner wall of the top guiding port 3 is used to filter carbon dioxide transported from the bottom liquid storage tank 1 to the top liquid storage tank 7, removing large particulate impurities.

[0033] like Figure 1-2 As shown, an inlet 8 is fixedly connected to the top of the top liquid storage tank 7, which is used to replenish carbon dioxide. An equipment base 9 is hinged to the top of the inlet 8, and a sensor 10 is installed on the top of the equipment base 9. The sensor 10 can monitor the temperature and smoke concentration inside the cabinet in real time, realizing automatic fire detection.

[0034] like Figure 5 As shown, the inner wall of the top liquid storage tank 7 is fixed with multiple internal mounting rings 11. Internal mounting brackets 13 are fixedly connected to the inner walls of the multiple internal mounting rings 11. Placement rings 14 are installed on the inner walls of each internal mounting bracket 13, and filter plates 12 are connected to the top of each placement ring 14. This structure performs secondary filtration of the carbon dioxide in the top liquid storage tank 7, ensuring that the carbon dioxide entering the fire extinguishing mechanism is pure and free of impurities, thus preventing blockage of pipes and nozzles.

[0035] like Figure 1-2As shown, the fire extinguishing mechanism includes a distribution ring pipe 18 sleeved on the outer wall of the top liquid storage tank 7. A fixed pipe 19 penetrates the outer wall of each of the multiple distribution ring pipes 18, enhancing the connection stability between the distribution ring pipes 18 and the top liquid storage tank 7. The bottom distribution ring pipe 18 is connected to the bottom liquid storage tank 1 via a transfer pump 16. A second transfer pipe 17 is fixedly connected to one side of the outer wall of the bottom distribution ring pipe 18. The end of the second transfer pipe 17 away from the distribution ring pipe 18 is equipped with the transfer pump 16. A first transfer pipe 15 is fixedly connected to the input end of the transfer pump 16. The end of the first transfer pipe 15 away from the transfer pump 16 is fixed to the outer wall of the bottom liquid storage tank 1. The transfer pump 16 can rapidly deliver high-pressure carbon dioxide from the bottom liquid storage tank 1 to the distribution ring pipe 18, and then distribute it to each fire extinguishing branch through the distribution ring pipe 18, ensuring synchronous liquid supply to multiple nozzles.

[0036] like Figure 1-3 , Figure 6 As shown, the multi-dimensional adjustment assembly is connected to the diversion ring pipe 18, specifically including a rotating joint 21 and a rotating joint 24 rotatably connected to the diversion ring pipe 18. Connecting pipes 20 are fixedly connected to one side of the outer wall of each of the multiple diversion ring pipes 18. Rotating joint 21 is rotatably connected to the end of each connecting pipe 20 away from the diversion ring pipe 18. A cleaning port 22 is provided at the top of each rotating joint 21, allowing for periodic cleaning of residual impurities inside the pipe for easy maintenance. A rotating elbow 23 is fixedly connected to the end of each rotating joint 21 away from the connecting pipe 20. Rotating joint 24 is rotatably connected to the end of each rotating elbow 23 away from rotating joint 21. Rotating elbow 25 is rotatably connected to the end of each rotating elbow 24 away from rotating elbow 23. Rotating section 1 21 can rotate 360°, driving rotating elbow 1 23 to adjust the horizontal spray angle; rotating section 2 24 connects rotating elbow 1 23 and rotating elbow 2 25, which can further adjust the vertical spray angle. Through two-stage rotation adjustment, the nozzle can cover any corner inside the power distribution cabinet, eliminating fire extinguishing blind spots.

[0037] Each of the multiple diversion ring pipes 18 has a fixed pipe 19 penetrating its outer wall. The fixed pipe 19 is used to enhance the connection stability between the diversion ring pipe 18 and the top liquid storage tank 7, and to prevent the pipe from shifting due to high pressure carbon dioxide impact.

[0038] A guide plate 26 is fixedly connected to the end of the rotating elbow 25 away from the rotating joint 24. The guide plate 26 guides carbon dioxide to enter the hose 27 evenly. A hose 27 is fixedly connected to one side of the outer wall of the guide plate 26. A nozzle connector 28 is fixedly connected to the end of multiple hoses 27 away from the guide plate 26. A sliding nozzle 29 is fixedly connected to one side of the outer wall of multiple nozzle connectors 28, and a limiting sliding rod 30 passes through the outer wall of the nozzle connector 28. The hose 27 is flexible and can be flexibly bent according to the nozzle position, adapting to the complex space inside the distribution cabinet. The sliding nozzle 29 is installed through the nozzle connector 28, and the limiting sliding rod 30 passes through the nozzle connector 28, allowing the sliding nozzle 29 to be finely adjusted laterally along the limiting sliding rod 30, expanding the spray range.

[0039] Multiple nozzle connectors 28 have telescopic rods 31 fixedly connected to their outer tops. Each telescopic rod 31 has a mounting bracket 34 extending through its top. The mounting bracket 34 is installed on the inner wall of the distribution cabinet. The nozzle height can be adjusted by extending and retracting the telescopic rods 31 to accommodate fire sources of different heights, achieving three-dimensional precision fire suppression.

[0040] like Figure 4 As shown, the recycling assembly includes a return filter box 35 fixedly connected to the outer wall of the bottom storage tank 1. Two return filter plates 33 are fixedly connected to the inner wall of the return filter box 35, and a filter layer 32 (such as an activated carbon filter layer or a fiber filter layer) is laid between the two return filter plates 33. The return filter box 35 is connected to the internal space of the distribution cabinet to recover unconsumed carbon dioxide. Carbon dioxide that is not completely consumed after fire extinguishing can enter the return filter box 35 through the return pipe. After being filtered by the return filter plates 33 and the filter layer 32 to remove impurities, it flows back to the bottom storage tank 1 for recycling, reducing resource waste.

[0041] In addition, the filter plate 12 installed in the top liquid storage tank 7 and the internal filter plate 4 embedded in the top guide port 3 constitute a two-stage filtration system to ensure that the carbon dioxide entering the fire extinguishing mechanism is pure and free of impurities.

[0042] Sensor 10 includes a temperature sensor and a smoke sensor, which can be a commercially available ionization smoke sensor or a photoelectric smoke sensor, and is electrically connected to the controller.

[0043] The transfer pump 16 is electrically connected to the sensor 10 via a controller. When the temperature or smoke concentration detected by the sensor 10 exceeds a preset threshold, the controller automatically starts the transfer pump 16.

[0044] The inlet of the return filter box 35 is connected to the recovery port opened at the bottom or side wall of the power distribution cabinet through the return pipe. A one-way valve can be installed at the recovery port to prevent carbon dioxide backflow.

[0045] The telescopic rod 31 can be an electric push rod, a pneumatic push rod, or a hydraulic push rod, preferably an electric push rod, and is electrically connected to the controller.

[0046] The mounting bracket 34 is detachably installed on the top or side wall of the inner wall of the distribution cabinet by bolts or clips.

[0047] The working principle of this device is as follows:

[0048] Phase 1: Standby pre-storage and real-time monitoring phase;

[0049] High-pressure liquid carbon dioxide is injected into the bottom storage tank 1 and the top storage tank 7 until the liquid level and pressure reach the preset standards. The bottom storage tank 1 serves as the main storage unit, storing a large amount of extinguishing agent. The top storage tank 7 is connected to the bottom storage tank 1 through a liquid guiding channel, forming a dual-storage buffer structure that links the upper and lower parts to ensure stable pressure during the delivery of the extinguishing agent. In standby mode, the internal filter plate 4 in the top guide port 3 and the multi-layer filter plate 12 in the top storage tank 7 constitute a two-stage filtration system to continuously purify the carbon dioxide in the storage chamber and prevent impurities from accumulating and clogging the pipeline. At the same time, the sensors 10 (temperature sensor and smoke sensor) enter real-time monitoring mode, continuously collecting temperature and smoke concentration data of the core electrical area in the power distribution cabinet and transmitting them to the controller in real time. The controller maintains the equipment in standby mode.

[0050] Phase Two: Fire Identification and Response Activation Phase;

[0051] When a fire breaks out in the distribution cabinet due to a short circuit, overload, poor contact, or other faults, the temperature and smoke concentration inside the cabinet rise rapidly. When the data collected by sensor 10 exceeds the preset safety threshold, a fire trigger signal is immediately sent to the controller. Upon receiving the signal, the controller responds in milliseconds and simultaneously executes two actions: first, it starts the transfer pump 16 to establish a high-pressure delivery path for the extinguishing agent; second, based on the monitoring data of the fire location, it sends a drive command to the multi-dimensional adjustment component to pre-adjust the spray direction of the nozzles, achieving pre-alignment of the fire location.

[0052] The third stage: the pressurization, delivery, diversion, and pressure stabilization stage of the extinguishing agent;

[0053] After the transfer pump 16 starts, it draws high-pressure liquid carbon dioxide from the bottom storage tank 1 through transfer pipe 15, and then pressurizes and delivers it through transfer pipe 2 17 to the diversion ring pipe 18 sleeved on the outer wall of the top storage tank 7. The multi-component diversion ring pipe 18 is connected to the top storage tank 7 through the fixed pipe 19. The high-pressure extinguishing agent in the top storage tank 7 is simultaneously replenished into the diversion ring pipe 18, forming a dual-supply mode, which effectively avoids pressure fluctuations in single-path delivery and ensures continuous and stable spray pressure. The diversion ring pipe 18 evenly distributes the high-pressure extinguishing agent to the connecting pipes 20 of each branch, completing the full-area diversion of the extinguishing agent and providing a stable medium supply for the synchronous spraying of multiple nozzles.

[0054] Phase Four: Multi-dimensional Precision Spraying Fire Extinguishing Phase;

[0055] The high-pressure extinguishing agent enters the multi-dimensional adjustment component through the connecting pipe 20, and then passes through the rotating joint 21, rotating elbow 23, rotating joint 24, rotating elbow 25, guide plate 26 and hose 27 in sequence, and is finally delivered to the sliding nozzle 29 and sprayed out at high speed. After being injected under high pressure, the liquid carbon dioxide vaporizes instantly, absorbing a large amount of heat to achieve rapid cooling. On the other hand, it rapidly dilutes the oxygen concentration in the distribution cabinet to below the critical combustion value, completely extinguishing the fire source through asphyxiation. Furthermore, carbon dioxide itself is non-conductive and non-corrosive, and will not cause secondary damage to energized circuits and electrical components. During this process, the multi-dimensional adjustment components achieve three-dimensional full-range adjustment of the nozzle: Rotary joint 1 21 can drive the pipeline to achieve 360° horizontal rotation, adjusting the horizontal spray direction of the nozzle; Rotary joint 24, in conjunction with rotating elbow 1 23 and rotating elbow 2 25, achieves stepless adjustment of the longitudinal pitch angle of the nozzle; The extension and retraction of the telescopic rod 31 drives the nozzle connecting seat 28 to rise and fall, adjusting the vertical height of the nozzle; The nozzle connecting seat 28 can slide laterally along the limiting sliding rod 30, achieving fine adjustment of the horizontal position of the nozzle. Through the coordinated action of the above-mentioned multi-dimensional adjustment mechanism, the sliding nozzle 29 can be driven to accurately target any fire source in the distribution cabinet, completely eliminating the fire extinguishing blind spot of traditional fixed nozzles, quickly suppressing the fire in the early stage of the fire, and preventing the fire from spreading along the circuit line.

[0056] Phase 5: Extinguishing agent recycling and purification phase;

[0057] When sensor 10 detects that the temperature and smoke concentration inside the cabinet have dropped to a safe threshold, the controller sends a stop command to shut down the transfer pump 16 and terminate the extinguishing agent spraying. After the fire is extinguished, any unconsumed carbon dioxide gas in the distribution cabinet enters the return filter box 35 through the recovery port and return pipe on the cabinet. It passes through two layers of return filter plates 33 and the middle filter layer 32, completing multi-stage filtration and purification of dust and smoke impurities. The clean carbon dioxide gas then flows back to the bottom storage tank 1, where it is cooled, liquefied, and stored again, achieving the recycling of the extinguishing agent, significantly reducing extinguishing agent waste, and lowering long-term equipment maintenance costs.

[0058] Phase 6: Equipment Reset and Maintenance Early Warning Phase;

[0059] After the fire extinguishing process is completed, the controller drives the multi-dimensional adjustment components to reset to the initial standby position. At the same time, it continuously monitors the level and pressure of the extinguishing agent in the bottom liquid storage tank 1 and the top liquid storage tank 7. When the extinguishing agent level is lower than the preset lower limit, it automatically issues a replenishment warning to remind maintenance personnel to replenish the extinguishing agent in time. The cleaning port 22 opened at the top of the rotating section 21 can clean and unclog the impurities in the pipeline without disassembling the entire pipeline during equipment maintenance, which greatly reduces the difficulty of equipment maintenance.

[0060] Installation method of high-pressure carbon dioxide fire extinguishing device in the distribution cabinet:

[0061] This device adopts a modular and adaptable design, which can be flexibly configured according to the cabinet specifications, internal circuit layout, and component arrangement of the power distribution cabinet. It does not alter the original main structure of the power distribution cabinet and does not affect the normal installation and maintenance of electrical components. The core configuration method is as follows:

[0062] The bottom liquid storage tank 1 is installed in an empty area at the bottom of the distribution cabinet (inside the cabinet base, on the side wall of the lower compartment), avoiding the cable inlet and grounding bar, and is firmly fixed to the cabinet with bolts; the top liquid storage tank 7 is fixed to the inner crossbeam / side wall of the top of the distribution cabinet through the top mounting bracket 6, vertically corresponding to the bottom liquid storage tank 1, and the liquid guiding channel between the two is arranged vertically along the corner of the inner wall of the cabinet, and the outer wall of the pipeline is insulated and flame-retardant; the liquid inlet 8 extends to the inside of the distribution cabinet maintenance door, and is equipped with a sealing plug and anti-theft lock structure, so that maintenance personnel can replenish the fire extinguishing agent without opening the main cabinet door;

[0063] The equipment base 9 is hinged to the top of the liquid inlet 8 of the top liquid storage tank 7. The sensor 10 is installed on the equipment base 9, with the detection end facing the core area of ​​the distribution cabinet, such as the busbar compartment, circuit breaker compartment, and cable compartment, where electrical components are dense and prone to fire. There are no obstructions to ensure that there are no blind spots in fire monitoring. The controller can be integrated into the equipment base 9 or installed on the inside of the distribution cabinet door. It is connected to the sensor 10, the transfer pump 16, the telescopic rod 31 and other electrical components through shielded flame-retardant cables. The cables are laid along the dedicated cable trays on the inner wall of the cabinet, and are run separately from the power cables. Insulation protection and anti-interference treatment are provided.

[0064] The diversion ring pipe 18 is fixed to the outer wall of the top liquid storage tank 7. One to three sets can be installed depending on the height of the distribution cabinet, evenly distributed vertically. Each set of diversion ring pipes 18 is equipped with one to four sets of multi-dimensional adjustment components and sliding nozzles 29, evenly distributed along the front, back, left, and right side walls of the cabinet to achieve full coverage of the cabinet space. The fixing frame 34 is installed on the top beam / side wall of the distribution cabinet using bolts or detachable clips. The limiting sliding rod 30 is horizontally fixed below the fixing frame 34. The rotating joint, rotating elbow, and hose 27 are arranged along the empty space of the cabinet's inner wall. The hose 27 has sufficient allowance for expansion and contraction to ensure no pipe interference or contact with live parts during nozzle adjustment. The initial spray direction of the sliding nozzle 29 faces the core electrical area inside the cabinet, and the multi-dimensional adjustment components can achieve seamless spray coverage of any point inside the cabinet.

[0065] The return filter box 35 is fixed to the outer wall of the bottom liquid storage tank 1 by bolts, and its outlet is sealed and connected to the inner cavity of the bottom liquid storage tank 1. The inlet of the return filter box 35 is connected to the recycling port at the bottom / side wall of the distribution cabinet through the return pipe. A one-way valve and a dust filter screen are installed at the recycling port to allow only carbon dioxide gas inside the cabinet to flow in, preventing external dust, moisture and insects from entering. The return pipe is laid along the bottom of the cabinet, avoiding cable trenches, grounding bars and live parts to ensure that the recycling path is unobstructed throughout.

[0066] All metal components of the device are equipotentially grounded to the distribution cabinet. The high-pressure liquid storage component is equipped with a safety valve and pressure gauge, which automatically releases pressure when the internal pressure exceeds the safety threshold. The pressure gauge extends to the inspection door for easy monitoring of the pressure status by maintenance personnel. After the device is installed, airtightness tests, insulation withstand voltage tests, and linkage spray tests must be performed throughout the process to ensure no media leakage, electrical insulation compliance, and normal linkage operation of all components, thus meeting the fire safety requirements of the distribution cabinet under energized conditions.

[0067] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A high-voltage carbon dioxide fire extinguishing device for emergency protection of electrical distribution cabinet circuits, comprising a bottom liquid storage tank (1) and a top liquid storage tank (7), wherein the bottom liquid storage tank (1) and the top liquid storage tank (7) are connected by a liquid guiding channel, characterized in that, Also includes: Fire extinguishing mechanism, the fire extinguishing mechanism including at least one diversion ring pipe (18) connected to the top liquid storage tank (7). A multi-dimensional adjustment component is connected to the diversion ring pipe (18) and includes at least one rotating joint, a telescopic drive component and a sliding guide component. The rotating joint, telescopic drive component and sliding guide component together drive the nozzle to achieve multi-dimensional position adjustment. And a recycling component, which is connected to the bottom storage tank (1) and is used to recover unconsumed carbon dioxide.

2. The high-voltage carbon dioxide fire extinguishing device for emergency protection of distribution cabinet circuits according to claim 1, characterized in that: The liquid guiding channel includes a liquid guiding port (2) fixedly connected to the top of the bottom liquid storage tank (1). The top of the liquid guiding port (2) is fixedly connected to a top guide port (3). An internal filter plate (4) is embedded in the inner wall of the top guide port (3). The top of the top guide port (3) is fixedly connected to a top mounting base (6) through a transmission port (5). The top liquid storage tank (7) is installed on the inner wall of the top mounting base (6).

3. The high-voltage carbon dioxide fire extinguishing device for emergency protection of distribution cabinet circuits according to claim 2, characterized in that: The top of the top liquid storage tank (7) is fixedly connected to the liquid inlet (8), and the top of the liquid inlet (8) is hinged to the equipment base (9), and the top of the equipment base (9) is equipped with a sensor (10).

4. The high-voltage carbon dioxide fire extinguishing device for emergency protection of distribution cabinet circuits according to claim 1, characterized in that: The inner wall of the top liquid storage tank (7) is fixed with a plurality of internal mounting rings (11), and the inner walls of the plurality of internal mounting rings (11) are fixedly connected with internal fixing frames (13). The inner walls of the internal fixing frames (13) are all equipped with placement rings (14), and the tops of the plurality of placement rings (14) are all connected with filter plates (12).

5. The high-voltage carbon dioxide fire extinguishing device for emergency protection of distribution cabinet circuits according to claim 1, characterized in that: The diversion ring pipe (18) is sleeved on the outer wall of the top liquid storage tank (7), and the outer walls of multiple diversion ring pipes (18) are all penetrated by fixed pipes (19); the diversion ring pipe (18) at the bottom end is connected to the bottom liquid storage tank (1) through the transfer pump (16).

6. The high-voltage carbon dioxide fire extinguishing device for emergency protection of distribution cabinet circuits according to claim 5, characterized in that: A second transmission pipe (17) is fixedly connected to one side of the outer wall of the bottom-end diversion ring pipe (18). The second transmission pipe (17) is equipped with a transmission pump (16) at the end away from the diversion ring pipe (18). The input end of the transmission pump (16) is fixedly connected to a first transmission pipe (15). The end of the first transmission pipe (15) away from the transmission pump (16) is fixed to the outer wall of the bottom liquid storage tank (1).

7. The high-voltage carbon dioxide fire extinguishing device for emergency protection of distribution cabinet circuits according to claim 1, characterized in that: The multi-dimensional adjustment component includes a rotating section one (21) and a rotating section two (24) rotatably connected to the diversion ring pipe (18). The rotating section one (21) and the rotating section two (24) are connected by a rotating elbow one (23) and a rotating elbow two (25). The end of the rotating elbow two (25) is connected to a hose (27) through a guide plate (26). The end of the hose (27) is fixedly connected to a nozzle connector (28). A sliding nozzle (29) is installed on the nozzle connector (28), and the nozzle connector (28) is slidably sleeved on a limiting sliding rod (30). A telescopic rod (31) is connected to the top of the nozzle connector (28), and the top of the telescopic rod (31) is fixed to a fixing frame (34).

8. The high-voltage carbon dioxide fire extinguishing device for emergency protection of distribution cabinet circuits according to claim 7, characterized in that: A connecting pipe (20) is fixedly connected to one side of the outer wall of each of the multiple diversion ring pipes (18). The end of the multiple connecting pipes (20) away from the diversion ring pipe (18) is rotatably connected to the rotating joint (21). A cleaning port (22) is opened at the top of the multiple rotating joints (21).

9. The high-voltage carbon dioxide fire extinguishing device for emergency protection of distribution cabinet circuits according to claim 7, characterized in that: The rotating elbows (23) are rotatably connected to the rotating joints (24) at the ends away from the rotating joints (21), and the rotating joints (24) are rotatably connected to the rotating elbows (25) at the ends away from the rotating elbows (23).

10. The high-voltage carbon dioxide fire extinguishing device for emergency protection of distribution cabinet circuits according to claim 1, characterized in that: The recycling assembly includes a reflux filter box (35) fixedly connected to the outer wall of the bottom storage tank (1). Two reflux filter plates (33) are fixedly connected to the inner wall of the reflux filter box (35), and a filter layer (32) is laid between the two reflux filter plates (33). The reflux filter box (35) is connected to the internal space of the distribution cabinet for recovering unconsumed carbon dioxide; and / or, The filter plate (12) installed in the top liquid storage tank (7) and the internal filter plate (4) embedded in the top guide port (3) constitute a two-stage filtration system.

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