A combined foam and ultrafine dry powder fire extinguishing device and method integrating fire extinguishing ball launching.

Abstract

This invention belongs to the field of fire protection equipment technology, specifically relating to an integrated foam and ultrafine dry powder fire extinguishing device and method that integrates fire extinguishing ball launching. The integrated foam and ultrafine dry powder fire extinguishing device includes a fire truck equipped with a fire monitor. A foam fire extinguishing system and an ultrafine dry powder fire extinguishing system are fixedly connected inside the fire truck and are connected to the fire monitor. It also includes a fire extinguishing ball feeding mechanism connected to the fire monitor for feeding fire extinguishing balls into the monitor. The feeding mechanism includes a tank mounted on the upper side of the fire truck, with a feeding slot on one side and a discharge pipe fixedly connected to the lower side of the tank. This invention can extinguish fires in blind spots of traditional fire monitors using fire extinguishing balls, reducing blind spots, minimizing the risk of reignition, and improving fire coverage.

Description

Technical Field

[0001] This invention belongs to the field of fire protection equipment technology, specifically relating to a fire extinguishing device and method that integrates fire extinguishing ball launching with foam ultrafine dry powder. Background Technology

[0002] Currently, the combined foam-ultrafine dry powder fire extinguishing technology has been widely applied in fire fighting in petrochemical plants, warehouses, substations, and other locations. It combines the advantages of ultrafine dry powder—rapid extinguishing speed and wide applicability—with foam—good coverage and strong ability to prevent reignition. For example, Chinese patents with authorization announcement numbers CN202777546U, CN203736762U, and CN204840743U disclose foam-ultrafine dry powder combined fire extinguishing devices with different structures, enabling independent or synergistic spraying of the two extinguishing agents, effectively improving fire extinguishing efficiency.

[0003] However, conventional sprayed foam and ultrafine dry powder can only cover the surface of the fire. The extinguishing agent cannot effectively reach hidden corners such as building gaps, equipment interiors, the back of obstacles, cable trenches, and pipe corridors. There are many dead corners in the fire, resulting in a high rate of fire reignition. Summary of the Invention

[0004] The purpose of this invention is to provide a fire extinguishing device and method that integrates fire extinguishing ball launching with foam ultrafine dry powder, which can use fire extinguishing balls to extinguish fires in the blind spots of traditional fire monitors, reduce fire extinguishing blind spots, reduce the risk of reignition, and improve fire extinguishing coverage.

[0005] The specific technical solution adopted by this invention is as follows: A combined foam and ultrafine dry powder fire extinguishing device integrating fire extinguishing ball launching includes a fire truck equipped with a fire monitor. The fire truck has a foam fire extinguishing system and an ultrafine dry powder fire extinguishing system fixedly connected inside, and the foam and ultrafine dry powder systems are connected to the fire monitor. It also includes a fire extinguishing ball feeding mechanism connected to the fire monitor for feeding fire extinguishing balls into the fire monitor.

[0006] Furthermore, the fire extinguishing ball feeding mechanism includes a tank mounted on the upper side of the fire truck, a feeding slot is provided on one side of the tank, a feeding pipe is fixedly connected to the lower side of the tank, a valve is fixedly connected to the lower side of the feeding pipe, and the valve is connected to the fire monitor through a connecting pipe.

[0007] Furthermore, a spiral anti-clogging mechanism is also installed on the tank body. The spiral anti-clogging mechanism includes a servo motor fixedly connected to the upper side of the tank body. A central shaft is fixedly connected to the output end of the servo motor. A spiral pusher is fixedly connected to the outer side of the central shaft. The lower end of the spiral pusher is located inside the feed tube.

[0008] Furthermore, a feed hopper adapted to the feed inlet is fixedly connected to one side of the tank body, and the side of the feed hopper away from the tank body is inclined upward.

[0009] Furthermore, the fire extinguishing device also includes an automatic feeding mechanism, which includes a chain conveyor mounted on a fire truck, and multiple fire extinguishing ball storage units are installed on the chain conveyor.

[0010] Furthermore, the fire extinguishing ball storage unit includes a fixed basket fixedly connected to the chain conveyor, a storage box detachably installed on the fixed basket, one side of the storage box being open, and a sealing plate fixedly connected to the open side of the storage box; The chain conveyor includes two side supports fixedly connected to the upper side of the fire truck. Each of the two side supports is rotatably connected to sprockets 1, 2, 3, 4, and 5. The height of sprocket 1 is lower than the height of the feed hopper, while the heights of sprockets 2, 3, 4, and 5 are higher than the height of the feed hopper. Chains are driven to the outer sides of sprockets 1, 2, 3, 4, and 5. The fixed basket is fixedly connected to the two chains. A servo motor 2 is fixedly connected to one of the side supports, and the servo motor 2 is driven to the two sprockets 2.

[0011] Furthermore, an opening assembly adapted to the sealing plate is fixedly connected to the feed hopper. The opening assembly includes an electric telescopic rod fixedly connected to the side of the feed hopper, and the piston rod of the electric telescopic rod is fixedly connected to an opening knife located on the upper side of the feed hopper.

[0012] A fire extinguishing method integrating foam and ultrafine dry powder for fire extinguishing ball launching includes the following steps: S1. Firefighting preparation: Install the storage box filled with fire extinguishing balls into the fixed basket and tighten the locking screws to fix it; start the second servo motor, which drives the first storage box to move above the feed hopper via the chain; start the electric telescopic rod to drive the opening knife to rise and cut the sealing plate of the storage box, so that the fire extinguishing ball falls into the tank of the fire extinguishing ball feeding mechanism. S2. Dry Powder Fire Control and Fireball Launch: Upon arrival at the fire scene, the ultra-fine dry powder fire extinguishing system is activated, spraying ABC type ultra-fine dry powder extinguishing agent into the fire scene through the fire monitor to quickly suppress the fire; at the same time, the valve is opened, and the servo motor is started to drive the spiral pusher to rotate, uniformly conveying the fireball in the tank to the connecting pipe, and then into the dry powder spray channel of the fire monitor; using the high-speed spray impact force of the ultra-fine dry powder extinguishing agent, the fireball is launched into the depth of the fire scene; S3, Dead-angle fire suppression: After landing, the fire extinguishing ball bounces multiple times due to the impact and airflow in the fire area, entering the dead-angle area of ​​the fire; when the temperature around the fire extinguishing ball reaches 120-150℃, it releases ultra-fine dry powder extinguishing agent to achieve dead-angle fire suppression. S4. Foam Covering to Prevent Reignition: After the fire is under control, close the ultra-fine dry powder fire extinguishing system and valves, start the foam fire extinguishing system, and spray foam extinguishing agent onto the fire scene through fire monitors to form a continuous foam covering layer. S5. Continuous replenishment: When the fire extinguishing balls in the tank are exhausted, the servo motor 2 automatically drives the next storage box to move above the feed hopper, repeating the opening and feeding operation of step S1 to achieve continuous automatic replenishment of fire extinguishing balls.

[0013] A fire extinguishing ball includes a spherical outer shell, the interior of which is filled with an ABC type ultrafine dry powder fire extinguishing agent unit, and a heat-sensitive initiator and a gas-generating agent wrapped around the heat-sensitive initiator are disposed at the center of the spherical outer shell.

[0014] The technical effects achieved by this invention are as follows: (1) The fire extinguishing device and method of the present invention, which integrates fire extinguishing ball launching foam ultrafine dry powder, launches fire extinguishing balls while extinguishing fire by adding a fire extinguishing ball feeding mechanism. After entering the fire scene, the fire extinguishing ball bounces multiple times due to impact and airflow, and can enter dead corners such as gaps, the back of obstacles, and the inside of equipment that cannot be covered by conventional fire extinguishing agents. After automatic triggering, the fire extinguishing agent is sprayed out, thereby extinguishing the fire in the above-mentioned fire extinguishing dead corners, reducing fire extinguishing dead corners, reducing the risk of reignition, and improving the fire extinguishing coverage rate.

[0015] (2) The fire extinguishing device and method of the present invention, which integrates fire extinguishing ball launching foam ultrafine dry powder, can launch fire extinguishing balls by setting a fire extinguishing ball feeding mechanism connected to the fire monitor, using the high-speed jet impact force of ultrafine dry powder fire extinguishing agent as the power. It has a simple structure, high reliability, and can realize long-distance continuous launching of fire extinguishing balls. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a partial structural schematic diagram of the fire extinguishing ball feeding mechanism and the automatic feeding mechanism of the present invention; Figure 3 This is a partial structural schematic diagram of the fire extinguishing ball feeding mechanism of the present invention; Figure 4 This is a cross-sectional structural schematic diagram of the fire extinguishing ball feeding mechanism of the present invention; Figure 5 This is a schematic diagram of the chain of the present invention; Figure 6 This is a schematic diagram of the structure of the fire extinguishing ball storage unit of the present invention; Figure 7 This is a cross-sectional structural diagram of the fire extinguishing ball of the present invention.

[0017] The attached diagram lists the components represented by each number as follows: 1. Fire truck; 2. Fire monitor; 3. Fire extinguishing ball feeding mechanism; 4. Automatic feeding mechanism; 5. Tank; 6. Discharge pipe; 7. Valve; 8. Connecting pipe; 9. Servo motor one; 10. Central shaft; 11. Spiral pusher; 12. Feed hopper; 13. Electric telescopic rod; 14. Opening knife; 15. Side support; 16. Sprocket one; 17. Sprocket two; 18. Sprocket three; 19. Sprocket four; 20. Sprocket five; 21. Chain; 22. Servo motor two; 23. Connecting leg; 24. Fixed basket; 25. Storage box; 26. Sealing plate; 27. Locking screw; 28. Spherical shell; 29. ​​ABC class ultrafine dry powder extinguishing agent unit; 30. Heat-sensitive initiator; 31. Gas generating agent. Detailed Implementation

[0018] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0019] like Figures 1-7 As shown, an integrated foam and ultrafine dry powder fire extinguishing device that launches fire extinguishing balls includes a fire truck 1. The fire truck 1 is equipped with a fire monitor 2, a fire extinguishing ball feeding mechanism 3, and an automatic feeding mechanism 4. The fire truck 1 is internally connected to a foam fire extinguishing system and an ultrafine dry powder fire extinguishing system. The foam fire extinguishing system and the ultrafine dry powder fire extinguishing system are connected to the fire monitor 2. During fire extinguishing, ultrafine dry powder, such as ABC type ultrafine dry powder fire extinguishing agent, is introduced into the fire monitor 2 through the ultrafine dry powder fire extinguishing system for fire extinguishing treatment. Then, foam, such as fluoroprotein foam fire extinguishing agent or aqueous film-forming foam fire extinguishing agent, is introduced into the fire monitor 2 through the foam fire extinguishing system for fire extinguishing treatment.

[0020] It should be noted that the number of fire monitors 2 can be one or two. When there is one fire monitor 2, both the foam extinguishing system and the ultrafine dry powder extinguishing system are connected to the fire monitor 2. When there are two fire monitors 2, the foam extinguishing system and the ultrafine dry powder extinguishing system are connected to the two fire monitors 2 respectively.

[0021] Among them, the foam fire extinguishing system and the ultrafine dry powder fire extinguishing system installed on fire truck 1 are mature existing technologies, which have been disclosed in authorization announcement numbers CN202777546U, CN203736762U, and CN204840743U. This technical solution will not elaborate on them further.

[0022] The core of this technical solution lies in the connection between the fire extinguishing ball feeding mechanism 3 and the fire monitor 2. This mechanism feeds several fire extinguishing balls into the fire monitor 2. When the ultrafine dry powder inside the fire monitor 2 is discharged, the impact force of the ultrafine dry powder propels the fire extinguishing balls into the fire area. Simultaneously, the fire extinguishing balls that fall into the fire area can bounce at least once, allowing them to land in areas that cannot be effectively extinguished, such as gaps or the back of obstacles. Then, the fire extinguishing balls begin their extinguishing action, extinguishing the fire in areas that cannot be effectively extinguished, such as gaps or the back of obstacles, thereby effectively improving the fire extinguishing performance.

[0023] like Figures 1-4 As shown, the fire extinguishing ball feeding mechanism 3 includes a tank 5 mounted on the upper side of the fire truck 1. A feeding slot is provided on one side of the tank 5. A feeding hopper 12 that is compatible with the feeding slot is fixedly connected to one side of the tank 5. The side of the feeding hopper 12 away from the tank 5 is tilted upward. The feeding hopper 12 can be used to easily add fire extinguishing balls into the interior of the tank 5.

[0024] The tank body 5 can be directly fixed to the upper side of the fire truck 1 via a bracket. The lower side of the tank body 5 is fixedly connected to a discharge pipe 6, and the lower side of the discharge pipe 6 is fixedly connected to a valve 7. The valve 7 is connected to the fire monitor 2 via a connecting pipe 8. The fire extinguishing ball can enter the interior of the tank body 5 through the feed trough, and then enter the interior of the fire monitor 2 through the discharge pipe 6 and the connecting pipe 8.

[0025] Optionally, a spiral anti-clogging mechanism can also be installed on the tank body 5. The spiral anti-clogging mechanism includes a servo motor 9 fixedly connected to the upper side of the tank body 5. A central shaft 10 is fixedly connected to the output end of the servo motor 9. A spiral pusher 11 is fixedly connected to the outer side of the central shaft 10. The lower end of the spiral pusher 11 is located inside the discharge pipe 6. At this time, by starting the servo motor 9 to drive the spiral pusher 11 to rotate, the rotating spiral pusher 11 can push the fire extinguishing ball downward at the lower part of the tank body 5 and the discharge pipe 6, so that the fire extinguishing ball can effectively enter the interior of the fire monitor 2.

[0026] It should be noted that the automatic feeding mechanism 4 is an optional mechanism, and its function is only to transport the fire extinguishing balls into the fire extinguishing ball feeding mechanism 3.

[0027] Specifically, such as Figures 1-2 As shown, the automatic feeding mechanism 4 includes a chain conveyor mounted on the fire truck 1. The chain conveyor is equipped with multiple fire extinguishing ball storage units. The chain conveyor can be directly fixed to the upper side of the fire truck 1 via a non-adjustable bracket, or it can be fixed to the fire truck 1 via a lifting bracket. The fire truck 1 is provided with a storage cavity that is compatible with the lifting bracket, so that the automatic feeding mechanism 4 can be stored inside the storage cavity of the fire truck 1.

[0028] In use, the fire extinguishing ball storage unit can be moved to the upper side of the feed hopper 12 by a chain conveyor, and then the fire extinguishing ball storage unit can be opened to pour the fire extinguishing balls inside the fire extinguishing ball storage unit into the feed hopper 12.

[0029] like Figure 2 and Figure 6 As shown, the fire extinguishing ball storage unit includes a fixed basket 24 fixedly connected to a chain conveyor. A storage box 25 is detachably installed on the fixed basket 24. One side of the storage box 25 is open, and a sealing piece 26 is fixedly connected to the open side of the storage box 25 to seal the opening of the storage box 25. Fire extinguishing balls are filled inside the storage box 25. After the fire extinguishing balls inside the storage box 25 are discharged, the storage box 25 can be replaced and new fire extinguishing balls can be installed.

[0030] The sealing sheet 26 can be made of aluminum foil composite film, plastic film or rubber sheet.

[0031] It should be noted that the size and volume of the storage box 25 can be designed freely according to requirements, and the dimensions shown in the attached diagram of the instruction manual are one example.

[0032] Specifically, the storage box 25 is installed inside the fixed basket 24. A locking screw 27 is threadedly connected to one side of the fixed basket 24. When the locking screw 27 abuts against the storage box 25, the storage box 25 can be locked.

[0033] The chain conveyor includes two side supports 15 fixedly connected to the upper side of the fire truck 1. Each side support 15 is rotatably connected to sprockets 16, 17, 18, 19, and 20. The height of sprocket 16 is lower than the height of the feed hopper 12, while the heights of sprockets 17, 18, 19, and 20 are higher than the height of the feed hopper 12. Chains 21 are driven to the outer sides of sprockets 16, 17, 18, 19, and 20. The fixed basket 24 is fixedly connected to the two chains 21. A servo motor 22 is fixedly connected to one of the side supports 15. The servo motor 22 is driven to the two sprockets 17. By starting the servo motor 22, the sprockets 17 are rotated, which in turn drives the fixed basket 24 to move via the chains 21.

[0034] Sprocket 16, sprocket 27, sprocket 318, sprocket 419, and sprocket 520 can be replaced with pulleys, and chain 21 can be replaced with a belt that is compatible with the pulleys.

[0035] Furthermore, the fixed basket 24 can be fixedly connected to the chain 21 by fixing two connecting legs 23 on both sides of the fixed basket 24, and the connecting legs 23 on both sides of the fixed basket 24 are fixedly connected to the two chains 21 respectively.

[0036] like Figures 2-4 As shown, in some embodiments, the feed hopper 12 may also be fixedly connected to an opening assembly adapted to the sealing plate 26. The opening assembly includes an electric telescopic rod 13 fixedly connected to the side of the feed hopper 12. The piston rod of the electric telescopic rod 13 is fixedly connected to an opening knife 14 located on the upper side of the feed hopper 12. The upper side of the opening knife 14 is provided with a blade. The shape of the opening knife 14 can be C-shaped or C-shaped. By activating the electric telescopic rod 13 to drive the opening knife 14 to rise, the opening knife 14 that contacts the sealing plate 26 can cut the sealing plate 26 that contacts the three sides of the storage box 25 through the opening knife 14, thereby allowing the fire extinguishing ball inside the storage box 25 to be discharged under the action of gravity.

[0037] In some embodiments, the fire extinguishing ball can be the fire extinguishing ball disclosed in patents with authorization announcement numbers CN200998548Y, CN206852963U, CN202699922U, CN201149469Y, etc.

[0038] like Figure 7 As shown, in some other embodiments, the fire extinguishing ball includes a spherical outer shell 28, the interior of which is filled with ABC type ultrafine dry powder extinguishing agent units 29. A heat-sensitive initiator 30 and a gas-generating agent 31 wrapped around the heat-sensitive initiator 30 are disposed at the center of the spherical outer shell 28. The spherical outer shell 28 is made of brittle polyvinyl chloride plastic with a wall thickness of 1-2 mm, which can break quickly when exposed to high temperature or impact. The triggering temperature of the heat-sensitive initiator 30 is 120-150℃. After igniting the gas-generating agent 31, it generates high-pressure gas, which evenly sprays out the ultrafine dry powder extinguishing agent.

[0039] A fire extinguishing method integrating foam and ultrafine dry powder for fire extinguishing ball launching includes the following steps: S1. Firefighting preparation: Install the storage box 25 filled with fire extinguishing balls into the fixed basket 24 and tighten the locking screws 27 to fix it; start the servo motor 22, which drives the first storage box 25 to move above the feed hopper 12 via the chain 21; start the electric telescopic rod 13 to drive the opening knife 14 to rise and cut the sealing piece 26 of the storage box 25, so that the fire extinguishing balls fall into the tank 5 of the fire extinguishing ball feeding mechanism 3; S2. Dry Powder Fire Control and Fireball Launch: Upon arrival at the fire scene, the ultra-fine dry powder fire extinguishing system is activated, and ABC type ultra-fine dry powder extinguishing agent is sprayed onto the fire scene through the fire monitor 2 to quickly suppress the fire; at the same time, valve 7 is opened, and servo motor 9 is started to drive the spiral pusher 11 to rotate, which uniformly transports the fireball in tank 5 to the connecting pipe 8, and then into the dry powder spray channel of fire monitor 2; using the high-speed spray impact force of ultra-fine dry powder extinguishing agent, the fireball is launched into the depth of the fire scene; S3, Dead-angle fire suppression: After landing, the fire extinguishing ball bounces multiple times due to the impact and airflow in the fire area, entering fire dead-angle areas that conventional fire extinguishing agents cannot cover, such as building gaps, equipment interiors, and the back of obstacles; when the temperature around the fire extinguishing ball reaches 120-150℃, it releases ultra-fine dry powder fire extinguishing agent to achieve dead-angle fire suppression. S4. Foam Covering to Prevent Reignition: After the fire is basically under control, close the ultra-fine dry powder fire extinguishing system and valve 7, start the foam fire extinguishing system, and spray foam extinguishing agent onto the fire scene through fire monitor 2 to form a continuous foam covering layer to reduce the phenomenon of fire reignition. S5. Continuous replenishment: When the fire extinguishing balls in the tank 5 are exhausted, the servo motor 22 automatically drives the next storage box 25 to move above the feed hopper 12, repeating the opening and feeding operation of step S1 to achieve continuous automatic replenishment of fire extinguishing balls.

[0040] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A combined foam and ultrafine dry powder fire extinguishing device integrating fire extinguishing ball launching, comprising a fire truck (1), wherein the fire truck (1) is equipped with a fire monitor (2), and a foam fire extinguishing system and an ultrafine dry powder fire extinguishing system are fixedly connected inside the fire truck (1), wherein the foam fire extinguishing system and the ultrafine dry powder fire extinguishing system are connected to the fire monitor (2), characterized in that: It also includes a fire extinguishing ball feeding mechanism (3), which is connected to the fire monitor (2) and is used to feed the fire extinguishing ball into the fire monitor (2).

2. The integrated foam ultrafine dry powder fire extinguishing device for launching fire extinguishing balls according to claim 1, characterized in that: The fire extinguishing ball feeding mechanism (3) includes a tank (5) mounted on the upper side of the fire truck (1). A feeding slot is provided on one side of the tank (5). A feeding pipe (6) is fixedly connected to the lower side of the tank (5). A valve (7) is fixedly connected to the lower side of the feeding pipe (6). The valve (7) is connected to the fire monitor (2) through a connecting pipe (8).

3. The integrated foam ultrafine dry powder fire extinguishing device for launching fire extinguishing balls according to claim 2, characterized in that: The tank (5) is also equipped with a spiral anti-blocking mechanism. The spiral anti-blocking mechanism includes a servo motor (9) fixedly connected to the upper side of the tank (5). The output end of the servo motor (9) is fixedly connected to a central shaft (10). A spiral pusher (11) is fixedly connected to the outer side of the central shaft (10). The lower end of the spiral pusher (11) is located inside the feed pipe (6).

4. The integrated foam ultrafine dry powder fire extinguishing device for launching fire extinguishing balls according to claim 3, characterized in that: A feeding hopper (12) adapted to the feeding trough is fixedly connected to one side of the tank (5), and the feeding hopper (12) is inclined upward on the side away from the tank (5).

5. The integrated foam ultrafine dry powder fire extinguishing device for launching fire extinguishing balls according to claim 4, characterized in that: It also includes an automatic feeding mechanism (4), which includes a chain conveyor mounted on the fire truck (1) and a plurality of fire extinguishing ball storage units installed on the chain conveyor.

6. The integrated foam ultrafine dry powder fire extinguishing device for launching fire extinguishing balls according to claim 5, characterized in that: The fire extinguishing ball storage unit includes a fixed basket (24) fixedly connected to a chain conveyor. A storage box (25) is detachably installed on the fixed basket (24). One side of the storage box (25) is open, and a sealing piece (26) is fixedly connected to the open side of the storage box (25). The chain conveyor includes two side supports (15) fixedly connected to the upper side of the fire truck (1). Each of the two side supports (15) is rotatably connected to a sprocket one (16), a sprocket two (17), a sprocket three (18), a sprocket four (19), and a sprocket five (20). The height of the sprocket one (16) is lower than the height of the feed hopper (12), and the height of the sprocket two (17), sprocket three (18), sprocket four (19), and sprocket five (20) is higher than the height of the feed hopper (12). The outer sides of the sprocket one (16), sprocket two (17), sprocket three (18), sprocket four (19), and sprocket five (20) are connected to a chain (21). The fixed basket (24) is fixedly connected to the two chains (21). A servo motor two (22) is fixedly connected to one of the side supports (15). The servo motor two (22) and the two sprocket two (17) are connected in a transmission manner.

7. The integrated foam ultrafine dry powder fire extinguishing device for launching fire extinguishing balls according to claim 6, characterized in that: The feed hopper (12) is fixedly connected to an opening assembly adapted to the sealing plate (26). The opening assembly includes an electric telescopic rod (13) fixedly connected to the side of the feed hopper (12). The piston rod of the electric telescopic rod (13) is fixedly connected to an opening knife (14) located on the upper side of the feed hopper (12).

8. A fire extinguishing method integrating foam and ultrafine dry powder for launching fire extinguishing balls, using the fire extinguishing device described in claim 7, characterized in that: Includes the following steps: S1. Firefighting preparation: Install the storage box (25) filled with fire extinguishing balls into the fixed basket (24) and tighten the locking screw (27) to fix it; start the second servo motor (22) and drive the first storage box (25) to move above the feed hopper (12) through the chain (21); start the electric telescopic rod (13) to drive the opening knife (14) to rise and cut the sealing plate (26) of the storage box (25) so that the fire extinguishing ball falls into the tank (5) of the fire extinguishing ball feeding mechanism (3); S2. Dry Powder Fire Control and Fireball Launch: Upon arrival at the fire scene, the ultra-fine dry powder fire extinguishing system is activated. The fire cannon (2) sprays ABC type ultra-fine dry powder fire extinguishing agent into the fire scene to quickly suppress the fire. At the same time, the valve (7) is opened, and the servo motor (9) drives the spiral pusher (11) to rotate, so that the fireball in the tank (5) is uniformly transported to the connecting pipe (8) and then enters the dry powder spray channel of the fire cannon (2). The high-speed spray impact force of the ultra-fine dry powder fire extinguishing agent is used to launch the fireball into the depth of the fire scene. S3, Dead-angle fire suppression: After landing, the fire extinguishing ball bounces multiple times due to the impact and airflow in the fire area, entering the dead-angle area of ​​the fire; when the temperature around the fire extinguishing ball reaches 120-150℃, it releases ultra-fine dry powder extinguishing agent to achieve dead-angle fire suppression. S4. Foam covering to prevent reignition: After the fire is under control, close the ultra-fine dry powder fire extinguishing system and valve (7), start the foam fire extinguishing system, and spray foam extinguishing agent into the fire scene through the fire monitor (2) to form a continuous foam covering layer; S5. Continuous replenishment: When the fire extinguishing balls in the tank (5) are exhausted, the servo motor (22) automatically drives the next storage box (25) to move above the feed hopper (12) and repeats the opening and feeding operation of step S1 to realize the continuous automatic replenishment of fire extinguishing balls.

9. A fire extinguishing ball, applied to the fire extinguishing device according to any one of claims 1-7, characterized in that: It includes a spherical shell (28), the interior of which is filled with an ABC type ultrafine dry powder fire extinguishing agent unit (29), and a heat-sensitive initiator (30) and a gas-generating agent (31) wrapped around the outside of the heat-sensitive initiator (30) are disposed at the center of the spherical shell (28).

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