Self-induction heat aerosol fire extinguishing device

Abstract

The application provides a self-induction heat aerosol fire extinguishing device, and relates to the field of fire extinguishing. The self-induction heat aerosol fire extinguishing device comprises a closed and gathered pressure storage bin, the pressure storage bin comprises a vertical pressure-resistant sealed cylinder body, and the space in the pressure storage bin is divided into three independent cavities in communication from top to bottom by a porous flow guide partition plate along the height direction of the pressure storage bin cylinder body, and the three independent cavities are a bottom medicament reaction cavity, a middle gradient cooling and pressure storage cavity and an upper annular pressure stabilizing cavity in sequence. The self-induction heat aerosol fire extinguishing device adopts a three-layer composite fusible binding belt matched with a torsional spring baffle opening and closing structure, realizes self-induction triggering of fire, relies on a force storage coil spring to drive the cylinder body to rotate to spray heat aerosol for fire extinguishing, releases pressure through a piston in a delayed manner, realizes the slow release of aerosol by using friction, improves the utilization rate of fire extinguishing medium, forms upper and lower three-dimensional spraying through a bottom arc circumferential bottom groove, and greatly expands the fire extinguishing coverage range.

Description

Technical Field

[0001] This invention relates to the field of fire fighting, specifically to a self-sensing thermal aerosol fire extinguishing device. Background Technology

[0002] Thermal aerosols are generated through the oxidation-reduction reaction of the solid aerosol generator itself, without the need for external oxygen. The generator is a mixture of oxidant (potassium nitrate or strontium nitrate), combustible reducing agent, and functional additives. When ignited by the triggering mechanism, the agent rapidly sustains combustion, undergoing a solid-phase exothermic reaction to generate three types of products: a large number of micron-sized metal salt solid particles (the core of fire extinguishing); inert cooling gases: N2, CO2, and water vapor; and a high-temperature mixed gas flow that is cooled by an internal cooling layer before being ejected from the nozzle, forming a suspended, uniform aerosol. The ultrafine metal salt particles in the aerosol enter the high-temperature zone of the flame, decompose and ionize, releasing metal cations that actively capture and neutralize combustion free radicals, directly interrupting the combustion chain reaction, and extinguishing the flame instantly. The suppression efficiency is far higher than simple suffocation or cooling. The smaller the particle size of the strontium or potassium salt particles, the larger the specific surface area, and the stronger the ability to capture free radicals.

[0003] For electrical equipment in enclosed spaces, such as energy storage battery compartments and high and low voltage distribution cabinets, which are small and enclosed spaces with densely packed internal battery cells, cables, and switching components, short circuits, overloads, and thermal runaway of lithium batteries can easily cause rapidly spreading, hidden Class E electrical fires.

[0004] Traditional firefighting methods rely on manual fire extinguishers, which can lead to delays in personnel arrival, allowing small fires to spread rapidly and causing thermal runaway of battery cells and equipment damage. In confined compartments, high-temperature smoke can accumulate, posing risks of electric shock, burns, and poisoning when extinguishing fires at close range. Furthermore, unattended locations cannot control fires in a timely manner. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a self-sensing thermal aerosol fire extinguishing device, which solves the problems of traditional fire extinguishing relying on manual fire extinguishers, such as delays in personnel arrival and risks of electric shock, burns, and poisoning from close-range fire extinguishing.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a self-sensing thermal aerosol fire extinguishing device, comprising a sealed accumulation and storage chamber, wherein the storage chamber comprises a vertical pressure-resistant sealed cylinder, and along the height direction of the storage chamber cylinder, the internal space of the storage chamber is divided into three independent cavities connected from top to bottom by a porous flow guide baffle, namely, a bottom agent reaction chamber, a middle gradient cooling storage chamber, and an upper annular pressure stabilizing chamber; The side wall of the accumulator cylinder has several outlets evenly distributed around its circumference. Inside each outlet, an arc-shaped baffle is rotatably installed via a rotating shaft. In the initial state, the arc-shaped baffle seals the outlet with an annular binding strap. When the binding strap senses the fire and melts, the arc-shaped baffle opens via a torsion spring, and the hot aerosol is sprayed out from the outlets by the air pressure inside the accumulator cylinder.

[0007] Preferably, the accumulator cylinder forms a completely sealed cavity inside, and the inner wall of the cylinder is covered with a high-temperature resistant heat insulation lining to prevent the high temperature of the reagent reaction from being transmitted outward.

[0008] Preferably, the outer side of the arc-shaped baffle is provided with a sealing gasket, which contacts each inner sidewall of the outlet.

[0009] Preferably, the pressure accumulator further includes a mounting base, the cylinder of the pressure accumulator is rotatably connected to the mounting base, and a sealing ring is provided between the two. A coil spring is fixedly installed on the outside of the mounting base, and the other end of the coil spring is fixedly connected to the cylinder of the pressure accumulator. In the initial state, the coil spring is in a charged state.

[0010] Preferably, a limiting rod is fixedly connected inside the mounting base. The limiting rod passes through several porous flow guide plates and is rotatably connected to the porous flow guide plates. The limiting rod has a through hole inside, and two symmetrical insert rods are inserted into the through hole. The other end of each insert rod is hinged to an arc-shaped baffle close to it.

[0011] Preferably, the outlet is provided with a limiting groove, the limiting groove is provided with a limiting block, the limiting block is fixedly connected to the rotating shaft, the rotating shaft is rotatably connected to the outlet, and is fixedly connected to the arc-shaped baffle.

[0012] Preferably, the outer sides of both the cylindrical body and the arc-shaped baffle are provided with grooves, and several grooves together form an annular groove for accommodating the restraint strap.

[0013] Preferably, the binding strap has a ring structure and is a three-layer integrated composite webbing, including an outer high-strength fiberglass bearing layer, a middle low-melting-point hot melt wire fusion layer, and an inner wear-resistant and heat-insulating bonding layer.

[0014] Preferably, the bottom of the cylinder is integrally formed with a bottom shell, a piston is slidably installed at the bottom of the cylinder, the piston is slidably connected to a limiting rod, a sealing ring A is provided between the piston and the cylinder, the sealing ring A is fixedly connected to the cylinder, a sealing ring B is installed between the piston and the limiting rod, the sealing ring B is fixedly connected to the limiting rod, a spring is fixedly connected between the piston and the bottom shell, the spring is in a stored state, and a bottom groove is provided inside the bottom shell.

[0015] Preferably, the bottom groove is arc-shaped, and there are several bottom grooves arranged in a circular pattern.

[0016] Compared with existing technologies, the present invention has the following advantages: This self-sensing thermal aerosol fire extinguishing device adopts a three-layer composite fusible binding strap combined with a torsion spring baffle opening and closing structure to achieve self-sensing triggering of fire. By setting a linkage locking structure between the plug rod and the limit rod, the opening and closing of the baffle and the rotation of the cylinder are linked. Relying on the energy storage coil spring to drive the cylinder to rotate and spray thermal aerosol for fire extinguishing, the piston delays and slowly releases pressure, and the friction force is used to achieve the staged and slow release of aerosol, improving the utilization rate of the fire extinguishing medium. The bottom arc-shaped circumferential groove forms a three-dimensional spray from top to bottom, greatly expanding the fire extinguishing coverage area. By replacing the binding strap, the device can be reset and reused without replacing the entire device, greatly reducing operation and maintenance costs. It has a compact structure, high degree of automation, and strong reliability, and is suitable for fire extinguishing scenarios involving electrical equipment in various confined spaces. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the front view of the pressure storage chamber of the present invention; Figure 3 This is a cross-sectional view of the side view of the accumulator chamber of the present invention; Figure 4 This is a sectional view of the top view of the cylinder of the present invention; Figure 5 This is a schematic diagram of the structure of the cylindrical body of the present invention; Figure 6 This is a schematic diagram of the arc-shaped baffle of the present invention; Figure 7 This is a bottom view of the cylindrical body of the present invention; Figure 8 This is a partial sectional view of the rotating shaft of the present invention; Figure 9 This is a schematic diagram of the limiting rod of the present invention; Figure 10 This is a cross-sectional view of the top view of the sealing gasket of the present invention.

[0018] The components are as follows: 1. accumulator chamber; 101. cylinder; 102. mounting base; 103. bottom shell; 104. restraint belt; 2. porous guide baffle; 3. outlet; 4. arc-shaped baffle; 5. torsion spring; 6. sealing gasket; 7. sealing ring; 8. coil spring; 9. limiting rod; 10. through hole; 11. insertion rod; 12. limiting groove; 13. limiting block; 14. rotating shaft; 15. groove; 16. piston; 17. sealing ring A; 18. sealing ring B; 19. spring; 20. bottom groove. Detailed Implementation

[0019] like Figures 1-10As shown, a self-sensing thermal aerosol fire extinguishing device includes a sealed accumulation chamber 1. The accumulation chamber 1 includes a vertical pressure-resistant sealed cylinder 101. Along the height of the cylinder 101, the internal space of the accumulation chamber 1 is divided into three independent cavities connected from top to bottom by a porous flow guide baffle 2: a bottom agent reaction chamber, a middle gradient cooling accumulation chamber, and an upper annular pressure stabilizing chamber. The cylinder 101 of the accumulation chamber 1 forms a completely sealed cavity. The inner wall of the cylinder 101 is covered with a high-temperature resistant heat insulation lining to prevent the high temperature of the agent reaction from being transmitted outward and to prevent the outer wall of the cylinder 101 from overheating and prematurely melting the outer annular fusible binding band 104. The accumulation chamber 1 also includes a mounting base 102. The cylinder 101 of the accumulation chamber 1 is rotatably connected to the mounting base, and a sealing ring 7 is provided between the two. A mounting bracket is fixedly installed on the outer side of the mounting base. A coil spring 8 is fixedly connected at one end to the cylinder 101 of the accumulator chamber 1. In the initial state, the coil spring 8 is in a charged state. A limiting rod 9 is fixedly connected inside the mounting base. The limiting rod 9 passes through several porous guide baffles 2 and is rotatably connected to the porous guide baffles 2. The limiting rod 9 has a through hole 10 inside. Two symmetrical insert rods 11 are inserted into the through hole 10. The other ends of the two insert rods 11 are hinged to the arc-shaped baffle 4 that is close to them. When the arc-shaped baffle 4 is in the closed state, the insert rods 11 are inserted into the limiting rod 9 and limit the limiting rod 9 to prevent the cylinder 101 from rotating relative to the mounting base. When the arc-shaped baffle 4 is opened, the arc-shaped baffle 4 drives the insert rods 11 to be pulled out from the through hole 10 of the limiting rod 9, automatically releasing the limit. Thus, the elastic force of the coil spring 8 is used to make the cylinder 101 rotate relative to the mounting base.

[0020] The accumulator chamber 1 has several outlets 3 evenly distributed circumferentially along its side wall. An arc-shaped baffle 4 is rotatably mounted within each outlet 3 via a rotating shaft 14. A limiting groove 12 is provided within each outlet 3, and a limiting block 13 is provided within the limiting groove 12. The limiting block 13 is fixedly connected to the rotating shaft 14, which is rotatably connected to the outlet 3 and fixedly connected to the arc-shaped baffle 4. The limiting groove 12 and the limiting block 13 limit the maximum rotation angle of the rotating shaft 14, thereby limiting the maximum opening angle of the arc-shaped baffle 4. In the initial state, the arc-shaped baffle 4 seals the outlet 3 with the annular binding band 104. When the binding band 104 senses the fire and melts, the arc-shaped baffle 4 opens through the torsion spring 5, and the hot aerosol is sprayed out from several outlets 3 by the air pressure in the cylinder 101 of the accumulator chamber 1. The arc-shaped baffle 4 is provided with a sealing gasket 6 on the outside, and the sealing gasket 6 contacts the inner sidewall of each outlet 3. The cylinder 101 and the arc-shaped baffle 4 are both provided with grooves 15 on the outside, and several grooves 15 together form an annular groove for accommodating the binding band 104.

[0021] The binding strap 104 has a ring structure and is a three-layer integrated composite webbing, including an outer high-strength fiberglass bearing layer, a middle low-melting-point hot-melt wire fusion layer, and an inner wear-resistant and heat-insulating bonding layer. At room temperature, the outer fiberglass bearing layer bears all the tensile force, and the middle hot-melt wire cooperates in shaping and bearing the force. When the ambient temperature rises to the melting point of the hot-melt wire, the middle fusion layer melts and fails, and the entire binding strap 104 breaks instantly. The bottom of the cylinder 101 is integrally formed with a bottom shell 103, and a piston 16 is slidably installed at the bottom of the cylinder 101. Piston 16 is slidably connected to limit rod 9. A sealing ring A17 is provided between piston 16 and cylinder 101, and sealing ring A17 is fixedly connected to cylinder 101. A sealing ring B18 is installed between piston 16 and limit rod 9, and sealing ring B18 is fixedly connected to limit rod 9. A spring 19 is fixedly connected between piston 16 and bottom shell 103. Spring 19 is in a charged state. Bottom shell 103 has a bottom groove 20. In the initial state, the air pressure inside cylinder 101 pushes piston 16 downward, and piston 16 abuts against cylinder 101. When the inner bottom wall of cylinder 101 stops moving, spring 19 is in a charged state. When the arc-shaped baffle 4 opens, the air pressure inside cylinder 101 gradually decreases, and spring 19 begins to push piston 16 along sealing ring A17 and sealing ring B18. There is friction between piston 16 and sealing rings A17 and B18. When the pressure inside cylinder 101 is lower than the reset threshold of spring 19, piston 16 begins to move. The movement of piston 16 is not instantaneous, but rather slow, utilizing friction, so that the cylinder... Most of the thermal aerosol inside body 101 has enough time to be discharged from outlet 3. When piston 16 disengages from sealing gasket 6A, the bottom of cylinder 101 is no longer sealed, but an opening appears. The remaining thermal aerosol falls into bottom shell 103 through the opening and is then discharged from bottom groove 20 of bottom shell 103. The bottom groove 20 is arc-shaped, and there are several bottom grooves 20 arranged in a circular pattern. When bottom shell 103 rotates with cylinder 101, thermal aerosol is discharged from below using several arc-shaped bottom grooves 20.

[0022] It should be noted that inside the bottom reagent reaction chamber: a reagent support bracket is fixed at the bottom of the chamber, and a solid aerosol generating reagent is placed on the bracket. An electric ignition assembly is installed next to the reagent. The two leads of the electric ignition assembly pass through the side wall of the accumulator chamber 1 cylinder 101 through sealed and waterproof terminals, and the leads are electrically connected to an external passive inductive triggering assembly. A heat insulation pad is placed at the bottom of the reagent support bracket to prevent the high temperature of the reagent combustion from being directly conducted to the bottom of the accumulator chamber 1 cylinder 101. Inside the middle gradient cooling accumulator chamber: aluminum-based honeycomb heat absorption cells are stacked and assembled sequentially from bottom to top. The system consists of a layer of chemically cooled granular packing material and a multi-layer stainless steel diversion filter. High-temperature hot aerosols flow upwards through the porous guide baffle 2, then sequentially pass through the three-layer cooling structure to absorb heat and cool down step by step. Simultaneously, the aerosols continuously accumulate and build up within the cavity, forming a high-pressure jet. The upper annular pressure-stabilizing cavity is a hollow annular pressure-stabilizing space without additional packing material, serving only as a pressure equalization buffer cavity. It collects the cooled, low-temperature, high-pressure aerosols, ensuring that the outward thrust of the gas at each outlet 3 is consistent, resulting in uniform stress distribution on the annular fusible binding band 104 and preventing premature breakage due to localized stress concentration.

[0023] When in use, the overall operation is divided into seven processes: standby stage, fire response triggering stage, agent combustion and gas generation stage, gradient cooling and pressure stabilization stage, lateral annular spray and cylinder 101 rotation full coverage fire extinguishing stage, bottom delayed release of residual aerosol stage, and post-disaster reset and reuse stage. Each link is structurally linked and logically closed-loop.

[0024] I. Standby Phase (Normal Operating Conditions without Fire): Structural assembly status: The accumulator chamber 1 cylinder 101 is divided into three sealed cavities by a porous flow guide baffle 2: a bottom reagent reaction chamber, a middle gradient cooling accumulator chamber, and an upper annular pressure stabilizing chamber. The interior of the cylinder 101 is fully lined with a high-temperature resistant heat insulation lining. The bottom reagent support bracket holds the solid aerosol reagent, and the lead wire of the electric ignition component passes through the cylinder 101 to connect to an external passive induction triggering component. Aluminum-based honeycomb, cooling particles, and a flow divider filter are stacked in layers in the cooling chamber. The upper pressure stabilizing chamber is hollow and balances the air pressure. All outlets 3 around the cylinder 101 are sealed by arc-shaped baffles 4, with sealing gaskets 6 on the outer side of the baffles fitting against the inner wall of the outlets 3; the cylinder 101 and the outer grooves 15 of the baffles are spliced ​​together to form a complete annular groove, and a three-layer composite binding strap 104 is installed in the groove to tighten all the baffles. The binding strap 104 relies on the outer fiberglass layer to bear the tensile force at room temperature and lock the baffles; the rotating shaft 14 is equipped with a torsion spring 5 in a compressed and stored state; the pressure accumulator cylinder 101 is rotatably connected to the mounting base, and the coil spring 8 is pre-loaded; the limiting rod 9 passes through the three-layer guide baffles, and two insert rods are inserted into the through hole 10 of the limiting rod 9. 11. The insert rod 11 is hinged to the arc-shaped baffle 4, and the insert rod 11 locks the limit rod 9 to prevent the cylinder 101 from rotating relative to the mounting seat; the limit groove 12 and the limit block 13 at the rotating shaft 14 limit the maximum opening angle of the baffle; the piston 16 at the bottom of the cylinder 101 is pressed down by the internal pre-pressurized air pressure, compressing the spring 19 between the bottom shell 103 and the piston 16, and the sealing ring A17 and sealing ring B18 respectively achieve the sealing between the piston 16 and the cylinder 101 and between the piston 16 and the limit rod 9, so that the cylinder 101 is completely sealed; multiple arc-shaped bottom grooves 20 are arranged around the circumference of the bottom shell 103.

[0025] It should be noted that this step uses a three-section sealed cavity to isolate external moisture and dust, preventing the reagent from becoming damp and ineffective; the heat insulation lining inside the cylinder 101 prevents the heat stored in the reagent from being transferred outward, avoiding premature melting of the restraint strap 104 due to high temperature of the cylinder wall, and preventing accidental start-up without flame; the insertion rod 11 and the limit rod 9 lock the cylinder 101, and the coil spring 8 is pre-loaded to prevent the cylinder 101 from rotating arbitrarily during transportation and vibration, protecting the internal cooling packing and reagent from shaking and damage; the limit block 13 limits the angle of the baffle to prevent long-term deformation and fatigue damage of the torsion spring 5; the bottom piston 16 bears the pressure of the compression spring 19, and the double sealing ring achieves zero leakage at the bottom, ensuring the sealing of the cavity and reserving a sealed space for combustion gas production and pressure accumulation; the device can be left static and ready for operation for a long time, unaffected by environmental temperature and humidity or equipment vibration, with no accidental triggering, no internal reagent loss, reliable sealing, and a stable and durable overall structure.

[0026] II. Fire Response Trigger Stage (Open Flame or High Temperature Appearance at the Scene): Action steps: After the protected area catches fire, the high-temperature hot airflow spreads to the outer ring restraint belt 104 of the device; the low melting point hot filament in the middle of the restraint belt 104 reaches the melting temperature and melts rapidly, the outer fiberglass support layer loses its support, and the entire restraint belt 104 breaks instantly, releasing the clamping constraint on all the arc baffles 4; at the same time, the external self-generated induction trigger component senses the high ambient temperature, conducts the circuit, and outputs an ignition signal to the electric ignition component.

[0027] It should be noted that in this structural step, the three-layer composite restraint strap 104 is layered and performs its functions, providing high strength load-bearing capacity at room temperature and rapid melting at high temperature. Compared with a single fusible strap, it will not experience local premature breakage or accidental opening of a single baffle. The dual-path sensing (thermal melting of the restraint strap 104 and external electrical induction) provides dual triggering, so that if one sensor fails, the other can still be activated, improving the reliability of fire extinguishing. The fire response is sensitive, and the two independent sensing paths are redundant, greatly reducing the probability of device failure. The restraint strap 104 melts synchronously as a whole, and all baffles unlock synchronously, preventing problems such as one side spraying first or pressure imbalance.

[0028] III. Gas generation stage of reagent combustion (high-temperature aerosol is generated inside the cavity): Action steps: After receiving an electrical signal, the electric ignition component ignites the solid aerosol agent; the agent burns stably in the bottom agent reaction chamber, continuously generating high-temperature extinguishing aerosol; heat insulation pads are laid at the bottom of the agent support to prevent the high temperature of combustion from being directly conducted to the bottom wall of the cylinder 101; the high-temperature aerosol generated by combustion passes upward through the porous guide baffle 2 and enters the middle gradient cooling and pressure storage chamber.

[0029] It should be noted that in this step, the heat insulation gasket isolates the high temperature at the bottom, preventing high-temperature deformation of the bottom of the cylinder 101 and failure of the bottom sealing structure; the porous flow guide baffle 2 diverts the high-temperature flue gas, preventing the airflow from directly hitting the upper cooling packing and causing local overheating and burning; the independent reagent reaction chamber limits the combustion space, ensuring that the reagent is fully and completely combusted, increasing the total gas production; the reagent is fully combusted, resulting in a large aerosol production; the bottom of the cylinder 101 and the bottom sealing structure are not damaged by high temperature, and the cavity remains sealed without pressure leakage throughout the process, providing a basis for pressure accumulation.

[0030] IV. Gradient Cooling, Pressure Accumulation, and Voltage Stabilization Stage: Operation steps: The high-temperature aerosol passes through the three-layer cooling structure from bottom to top: the aluminum-based honeycomb heat-absorbing layer, the chemical cooling particle packing layer, and the stainless steel multi-layer diversion filter. The aluminum honeycomb rapidly absorbs the high temperature, the chemical particles neutralize the high temperature and suppress the residual heat of the aerosol, and the stainless steel filter disperses large particles of flue gas and diverts the flow evenly. The aerosol continuously accumulates in the middle cooling chamber, and the continuous combustion produces gas, causing the internal gas pressure of the chamber to rise continuously. After cooling, the aerosol flows upward into the upper annular pressure-stabilizing chamber. The hollow annular space gathers the airflow from all places and equalizes the gas pressure at all outlets 3 around the cylinder 101.

[0031] It should be noted that in this step, multi-stage gradient cooling absorbs heat layer by layer, reducing the temperature of the aerosol from thousands of degrees Celsius to a safe spray temperature, preventing the high-temperature aerosol from igniting surrounding equipment and causing a secondary fire; the pressure stabilizing chamber balances the circumferential pressure, avoiding excessive pressure on one side and premature partial breakage of the restraint belt 104, ensuring consistent thrust at all outlets 3; the aerosol spray temperature is low, eliminating the risk of secondary fire; the spraying power is uniform around the cylinder 101, and the lateral spray flow is consistent, eliminating weak areas in the local fire extinguishing coverage.

[0032] 5. The arc-shaped baffle 4 opens, the cylinder 101 rotates, and the fire is extinguished by lateral, all-around, ring-shaped spray: Step-by-step operation: Step 1: After the restraint strap 104 breaks, the torsion spring 5 pushes the arc-shaped baffle 4 to rotate outward around the rotation axis 14. The limiting groove 12 and the limiting block 13 limit the maximum opening angle of the baffle, ensuring sufficient opening and preventing the torsion spring 5 from being overloaded. All discharge ports 3 open simultaneously, and high-pressure low-temperature aerosol is sprayed outward from the circumferential discharge ports 3, covering the equipment space laterally. Step 2: When the baffle rotates outward, the insert rod 11 hinged to the baffle is pulled outward simultaneously. The insert rod 11 is completely pulled out from the through hole 10 inside the limiting rod 9, and the rotation limit between the cylinder 101 and the mounting base is completely released. Step 3: The pre-charged coil spring 8 releases its elasticity instantly, driving the entire cylinder 101 of the accumulator chamber 1 to rotate around the limiting rod 9. During the continuous rotation of the cylinder 101, the circumferential discharge ports 3 continuously spray aerosol outward, achieving lateral fire extinguishing with no dead angles.

[0033] It should be noted that in this step, the torsion spring 5 independently drives the baffle, requiring no additional power source, making the structure simple and reliable; the insert rod 11 is mechanically linked to the baffle, and the cylinder 101 is only released from its limit when the baffle is fully open, ensuring that the nozzle opens first and then rotates, preventing the cylinder 101 from rotating prematurely and blocking the nozzle; the coil spring 8 continuously provides rotational power, extending the rotational spray duration; the limit block 13 controls the baffle opening, preventing the baffle from flipping outward and blocking the spray airflow; the mechanical linkage does not rely on electrical control, and can still rotate and spray normally in power outage scenarios; the rotational lateral spray greatly expands the fire extinguishing coverage area, eliminates fire extinguishing dead zones at the edges and corners of enclosed equipment, ensures uniform distribution of the extinguishing medium, and rapidly suffocates and suppresses the fire.

[0034] VI. Bottom piston 16 delayed release, secondary three-dimensional emission of residual aerosol: Step-by-step operation: Step 1: During the continuous lateral spraying, the internal air pressure of the cylinder 101 slowly decreases; when the cavity pressure is higher than the reset threshold of the spring 19, the friction on both sides of the piston 16 cancels the spring force of the spring 19, and the piston 16 remains stationary, ensuring that the high-pressure aerosol is fully sprayed out from the lateral discharge port 3. Step 2: As the internal pressure continues to decrease to below the reset threshold of the spring 19, the thrust of the spring 19 overcomes the sliding friction between the piston 16 and the double sealing ring, and the piston 16 moves downward slowly (not instantaneously and rapidly), extending the duration of the lateral spraying and maximizing the utilization of the extinguishing aerosol. Step 3: After the piston 16 continues to move downward and disengages from the sealing ring A17, the bottom seal of the cylinder 101 fails, and a pressure relief opening is formed at the bottom of the cavity; the residual aerosol in the cylinder 101 falls downward into the bottom shell 103, and is discharged downward from multiple evenly distributed arc-shaped bottom grooves 20 as the cylinder 101 rotates, forming a three-dimensional double-layer spraying system with lateral spraying at the top and downward spraying at the bottom.

[0035] It should be noted that in this step, the friction buffers the movement speed of piston 16, preventing the pressure from being released all at once and the lateral spray from terminating prematurely; the secondary pressure relief channel at the bottom releases residual aerosols, preventing high-pressure and high-temperature flue gas from remaining inside the cylinder 101 and eliminating the risk of explosion and reignition; the arc-shaped circumferential groove 20 adapts to the rotation of cylinder 101, ensuring uniform and unobstructed air output from the bottom; the aerosol utilization rate is greatly improved, and the fire extinguishing duration is longer; the bidirectional three-dimensional spray completely eliminates hidden ignition points at the bottom and below of the equipment; after the spraying is completed, there is no residual pressure in the cavity, making the equipment safer to use.

[0036] VII. After the fire is extinguished, the entire machine is reset and reused: Reset Procedure: After the fire is completely extinguished and the device cavity is completely cooled, clean the agent residue inside the cylinder 101 and replace it with a brand new solid aerosol agent; reset the piston 16 and compress the bottom spring 19 to the initial pressure state; manually rotate the cylinder 101 to compress the coil spring 8 to the storage position, and reinsert the insertion rod 11 into the through hole 10 of the limit rod 9 to lock the cylinder 101; manually close all the arc-shaped baffles 4, and insert a brand new three-layer composite restraint strap 104 into the annular groove where the cylinder 101 and the baffles are joined, tighten all the baffles to complete the seal; reconnect the external passive induction triggering component, and the device returns to the complete standby state and can be used again for fire extinguishing.

[0037] It should be noted that in this step, all opening, closing, rotating, and depressurizing structures can be manually reset. Only consumables (chemical agents and restraint belts 104) need to be replaced. The cylinder 101, cooling layer, rotating mechanism, and piston 16 components can all be recycled and reused without replacing the entire machine. The post-disaster maintenance cost is extremely low, as only low-cost consumables need to be replaced for reuse. Compared with disposable aerosol devices, this significantly reduces long-term operating costs and is energy-saving and environmentally friendly.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations 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.

Claims

1. A self-sensing thermal aerosol fire extinguishing device, characterized in that: It includes a sealed pressure accumulator (1), which includes a vertical pressure-resistant sealed cylinder (101). Along the height direction of the cylinder (101) of the pressure accumulator (1), the internal space of the pressure accumulator (1) is divided into three independent cavities connected from top to bottom by a porous flow guide baffle (2), namely, the bottom drug reaction cavity, the middle gradient cooling pressure accumulator cavity, and the upper annular pressure stabilizing cavity. The side wall of the accumulator (1) cylinder (101) has several outlets (3) evenly opened in the circumferential direction. An arc-shaped baffle (4) is installed in the outlet (3) through a rotating shaft (14). In the initial state, the arc-shaped baffle (4) seals the outlet (3) through an annular binding band (104). When the binding band (104) senses the fire and melts, the arc-shaped baffle (4) opens through a torsion spring (5) and the hot aerosol is sprayed out from the outlets (3) by the air pressure in the accumulator (1) cylinder (101).

2. The self-induction thermal aerosol fire extinguishing device according to claim 1, characterized in that: The pressure storage chamber (1) forms a completely closed sealed cavity inside the cylinder (101). The inner wall of the cylinder (101) is covered with a high-temperature resistant heat insulation lining to prevent the high temperature of the reagent reaction from being transmitted to the outside.

3. The self-induction thermal aerosol fire extinguishing device according to claim 1, characterized in that: The arc-shaped baffle (4) is provided with a sealing gasket (6) on the outside, and the sealing gasket (6) is in contact with each inner wall of the outlet (3).

4. The self-induction thermal aerosol fire extinguishing device according to claim 1, characterized in that: The pressure accumulator (1) also includes a mounting base (102). The cylinder (101) of the pressure accumulator (1) is rotatably connected to the mounting base, and a sealing ring (7) is provided between them. A coil spring (8) is fixedly installed on the outside of the mounting base. The other end of the coil spring (8) is fixedly connected to the cylinder (101) of the pressure accumulator (1). In the initial state, the coil spring (8) is in a power storage state.

5. The self-induction thermal aerosol fire extinguishing device according to claim 4, characterized in that: The mounting base is fixedly connected to a limiting rod (9), which passes through several porous flow guide plates (2) and is rotatably connected to the porous flow guide plates (2). The limiting rod (9) has a through hole (10) inside, and two symmetrical insert rods (11) are inserted into the through hole (10). The other ends of the two insert rods (11) are hinged to the arc-shaped baffle (4) close to them.

6. The self-induction thermal aerosol fire extinguishing device according to claim 1, characterized in that: The outlet (3) is provided with a limiting groove (12), and the limiting groove (12) is provided with a limiting block (13). The limiting block (13) is fixedly connected to the rotating shaft (14), the rotating shaft (14) is rotatably connected to the outlet (3), and is fixedly connected to the arc-shaped baffle (4).

7. The self-induction thermal aerosol fire extinguishing device according to claim 1, characterized in that: The outer sides of the cylinder (101) and the arc-shaped baffle (4) are provided with grooves (15), and several grooves (15) together form an annular groove for accommodating the restraint strap (104).

8. The self-induction thermal aerosol fire extinguishing device according to claim 1, characterized in that: The binding strap (104) has a ring structure and is a three-layer integrated composite webbing, including an outer high-strength glass fiber bearing layer, a middle low-melting-point hot melt wire fusion layer, and an inner wear-resistant and heat-insulating bonding layer.

9. The self-induction thermal aerosol fire extinguishing device according to claim 1, characterized in that: The bottom of the cylinder (101) is integrally formed with a bottom shell (103). A piston (16) is slidably installed on the bottom of the cylinder (101). The piston (16) is slidably connected to the limiting rod (9). A sealing ring A (17) is provided between the piston (16) and the cylinder (101). The sealing ring A (17) is fixedly connected to the cylinder (101). A sealing ring B (18) is installed between the piston (16) and the limiting rod (9). The sealing ring B (18) is fixedly connected to the limiting rod (9). A spring (19) is fixedly connected between the piston (16) and the bottom shell (103). The spring (19) is in a stored state. A bottom groove (20) is provided inside the bottom shell (103).

10. A self-induction thermal aerosol fire extinguishing device according to claim 1, characterized in that: The bottom groove (20) is arc-shaped, and several bottom grooves (20) are provided and distributed in a circular pattern.

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