Foam fire extinguishing device and fire extinguishing method thereof

Abstract

The present invention discloses a foam fire extinguishing device and a fire extinguishing method thereof, and relates to the technical field of foam fire extinguishing devices. The device comprises a bracket, wherein a connecting box is fixedly installed near the top of the bracket, a mixing tube is fixedly installed on the top surface of the connecting box, a bearing sleeve is embedded and fixed inside the mixing tube, an arc frame is fixedly installed near the middle of the connecting box, and docking frames are fixedly connected to both ends of the arc frame. A gradually expanding frame is fixedly installed at the lower end of the connecting box inside the bracket. By setting up a mixing tube assembly, nitrogen can be used to aerate and atomize the foaming agent, making it easier to mix with clean water and produce more foam. By using the arc frame assembly, the mixing effect of the foaming agent and clean water can be further improved. In combination with the gradually expanding frame assembly structure, the foaming solution can be further mixed with the added BTP, thereby improving the fire extinguishing effect of the foam fire extinguishing device.

Description

Technical Field

[0001] The present invention relates to the technical field of foam fire extinguishing devices, and in particular to a foam fire extinguishing device and a fire extinguishing method thereof. Background Art

[0002] Currently, the most common and effective method for extinguishing liquid fuel fires is water-based foam. This foam quickly spreads on the surface of the liquid fuel to form a foam layer that blocks fuel vapor from entering the flame. Water vaporization and liquid separation absorb heat to reduce the temperature of the fuel surface, achieving the purpose of rapid fire extinguishing.

[0003] The invention patent with publication number CN113509662A discloses a clean gas fluorine-free foam fire extinguishing device and fire extinguishing method thereof. The device utilizes swirl to enhance gas-liquid turbulence to produce foams while adapting to the characteristic that the foam volume increases continuously during the movement, so that the swirl element gradually expands and develops, reducing foam loss caused by excessive resistance and ensuring a high foaming rate of the device. The clean gas fluorine-free fire extinguishing foam is prepared by vaporizing liquid nitrogen as the foam gas phase and adding clean gas BTP in liquid form to the foam liquid phase. The asphyxiation extinguishing effect of nitrogen and the chemical extinguishing effect of BTP are fully utilized to achieve physical and chemical dual fire extinguishing and improve the fire extinguishing efficiency of the foam. The foam liquid is a fluorine-free foam liquid with added silica nanoparticles and cationic silicone surfactants to improve the foam's spreadability and ability to block fuel vapor. The foam is produced by a jet-spiral mesh method.

[0004] This comparative document device has certain shortcomings during actual use. Its foaming agent is directly mixed with water and then pumped into the annular nozzle group to mix with liquid nitrogen. In this mixing method, the foaming agent is not easy to mix evenly with water, which easily leads to a small amount of foam produced in the end. Summary of the Invention

[0005] The purpose of the present invention is to provide a foam fire extinguishing device and a fire extinguishing method thereof to solve the above technical problems.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A foam fire extinguishing device and a fire extinguishing method thereof, comprising a bracket, a connecting box fixedly mounted near the top of the bracket, a mixing tube fixedly mounted on the top surface of the connecting box, a bearing sleeve embedded and fixed inside the mixing tube, an arc-shaped frame fixedly mounted near the middle of the connecting box, docking frames fixedly connected at both ends of the arc-shaped frame, and a gradually expanding frame fixedly mounted at the lower end of the connecting box inside the bracket;

[0008] The side surface of the arc frame is symmetrically fixedly connected with a connecting joint, the side surface of the connecting joint is provided with a water outlet, the surface of the connecting joint is sleeved and connected with a ring, the side surface of the ring is provided with a cutting surface, the surface of the cutting surface is provided with a rotating rod, the side surface of the rotating rod is fixedly connected with a docking rod, the surface of the docking rod is fixedly connected with a paddle, and the surface of the paddle is provided with a hole groove.

[0009] As a further solution of the present invention: the top surface of the connection box is fixedly connected to a cover, the bottom surface of the connection box is fixedly connected to a box bottom plate, the top surface of the connection box is fixedly installed with a connecting valve, and the bottom surface of the box bottom plate is fixedly installed with an electric control valve in the middle.

[0010] As a further solution of the present invention: a discharge head is fixedly installed on the bottom surface of the mixing tube, a connecting frame is provided inside the mixing tube, the side surface of the connecting frame is symmetrically fixedly connected with an inclined block, the inclined block is fixedly connected to the mixing tube, the top surface of the mixing tube is spirally connected with a feeding head, the side surface of the feeding head is fixedly connected with a liquid inlet pipe, the side surface of the feeding head away from the liquid inlet pipe is fixedly connected with an air inlet pipe, and the output end of the liquid inlet pipe is fixedly connected with a liquid infusion pipe.

[0011] As a further solution of the present invention: the top surface of the connecting frame is fixedly connected with a guide tube, the guide tube is fixedly connected to the infusion tube, the bottom surface of the connecting frame is fixedly connected with a drainage tube, the interior of the drainage tube is embedded and fixedly connected with a semi-block, and the interior of the mixing tube is provided with an embedding groove.

[0012] As a further solution of the present invention: the bearing sleeve is fixedly connected to the embedding groove, the interior of the bearing sleeve is rotatably connected to a connecting sleeve, the inner surface of the connecting sleeve is fixedly connected to an arc-shaped blade, the surface of the arc-shaped blade is fixedly connected to a docking tube, and the surface of the docking tube is fixedly connected to a sealing block.

[0013] As a further solution of the present invention: a through groove is provided inside the arc-shaped frame, the through groove is connected to the water outlet, the surface of the cutting surface is symmetrically fixedly connected with protrusions, the protrusions are clamped with the rotating rod, and the side surface of the ring away from the cutting surface is fixedly connected with a nozzle, wherein the surfaces of two of the rings are fixedly connected with linkage gears.

[0014] As a further solution of the present invention: the side surface of the docking frame is fixedly connected to the welding frame, and water inlet holes are provided inside the docking frame and the welding frame, and the water inlet holes are docked with the through grooves, and the two long side surfaces of the docking frame are symmetrically fixedly connected to side support rods, and the surfaces of the side support rods are fixedly connected to the motor, and a connecting disk is fixedly installed on the surface of one end of the motor, and a transmission gear is fixedly connected to the interior of the connecting disk at the output end of the motor, and the transmission gear is meshed with the linkage gear.

[0015] As a further solution of the present invention: a linkage disk is fixedly installed on the top surface of the gradually expanding frame, a motor is fixedly installed on the bottom surface of the linkage disk, a rotating wheel is symmetrically connected to the inside of the linkage disk, a belt is sleeved on the surface of the rotating wheel, one of the rotating wheels is fixedly connected to the output end of the motor, an anti-slip frame is fixedly installed on the inside of the gradually expanding frame, a stirring shaft is rotatably connected to the surface of the anti-slip frame, the other rotating wheel is fixedly connected to the stirring shaft, stirring blades are equidistantly fixedly connected to the side surface of the stirring shaft, a water pipe is fixedly connected to the bottom surface of the gradually expanding frame, and a nozzle is fixedly connected to one end of the water pipe.

[0016] A fire extinguishing method using a foam fire extinguishing device, comprising the following steps:

[0017] 1. Introduce the foaming agent and nitrogen into the mixing tube through the liquid inlet pipe and the air inlet pipe respectively. Under the guidance of the inclined block, the high-pressure nitrogen will atomize the foaming agent and disperse it into mist. Then it enters the connection box together. Then the user injects BTP through the connecting valve;

[0018] Second, use the paddle on the curved frame to stir the mixed solution. The holes and grooves on the surface can easily generate small bubbles.

[0019] 3. After the mixed gas and liquid are introduced into the gradually expanding frame, they are further stirred by the stirring shaft, and then the user can extinguish the fire at the fire point through the nozzle.

[0020] Beneficial effects of the present invention:

[0021] Through the provided mixing tube assembly, nitrogen can be used to aerate and atomize the foaming agent, making it easier to mix with clean water and produce more foam. The arc frame assembly can further enhance the mixing effect of the foaming agent and clean water. Combined with the gradually expanding frame assembly structure, the foaming solution can be further mixed with the added BTP, thereby enhancing the fire extinguishing effect of this foam fire extinguishing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic cross-sectional structure diagram of the connection box assembly of the present invention;

[0025] Figure 3 1 is a schematic diagram of the cross-sectional structure of the mixing tube assembly of the present invention;

[0026] Figure 4It is a structural schematic diagram of the bearing sleeve assembly of the present invention;

[0027] Figure 5 It is a schematic diagram of the connection structure of the arc frame and the docking frame assembly of the present invention;

[0028] Figure 6 This is a schematic diagram of the disassembled structure of the arc frame assembly of the present invention;

[0029] Figure 7 It is a structural schematic diagram of the docking frame assembly of the present invention;

[0030] Figure 8 It is a schematic structural diagram of the cross-section component of the gradually expanding frame of the present invention.

[0031] In the figure: 1. Bracket; 2. Connecting box; 3. Cover; 4. Box bottom plate; 5. Connecting valve; 6. Electric control valve; 7. Mixing pipe; 8. Discharge head; 9. Connecting frame; 10. Inclined block; 11. Feeding head; 12. Liquid inlet pipe; 13. Air inlet pipe; 14. Mounting groove; 15. Bearing sleeve; 16. Connecting sleeve; 17. Curved blade; 18. Butt pipe; 19. Seal block; 20. Curved frame; 21. Connecting joint; 22. Water outlet; 23. Ring; 24. Bump; 25. Rotating rod; 26. Docking rod; 27. Paddle; 28. Hole slot; 29. ​​Linkage gear; 30. Docking frame; 31. Welding frame; 32. Water inlet; 33. Side support rod; 34. Motor; 35. Connecting plate; 36. Gradual expansion frame; 37. Linkage plate; 38. Motor; 39. Stirring shaft; 40. Stirring blade; 41. Anti-slip frame; 42. Sprinkler. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] See also Figures 1-8 As shown, the present invention is a foam fire extinguishing device and a fire extinguishing method thereof, comprising a bracket 1, a connecting box 2 fixedly mounted near the top of the bracket 1, a mixing pipe 7 fixedly mounted on the top surface of the connecting box 2, a bearing sleeve 15 embedded and fixed inside the mixing pipe 7, an arc frame 20 fixedly mounted near the middle of the connecting box 2, a docking frame 30 fixedly connected to both ends of the arc frame 20, and a gradually expanding frame 36 fixedly mounted at the lower end of the connecting box 2 inside the bracket 1;

[0034] The side surface of the arc frame 20 is symmetrically fixedly connected with a connecting section 21, and the side surface of the connecting section 21 is provided with a water outlet 22. The surface of the connecting section 21 is sleeved and connected with a collar 23. The side surface of the collar 23 is provided with a cutting surface. The surface of the cutting surface is provided with a rotating rod 25. The side surface of the rotating rod 25 is fixedly connected with a docking rod 26. The surface of the docking rod 26 is fixedly connected with a paddle 27. The surface of the paddle 27 is provided with a hole groove 28. After the atomized foaming agent enters the connection box 2, the user can inject clean water into the arc frame 20, and then the water is sprayed from the water outlet 22 and mixed with the foaming agent. Under the rotation of the collar 23, the rotating rod 25 will drive the docking rod 26 to stir the mixed gas and liquid. The paddle 27 can enhance the stirring amplitude, and the hole groove 28 on its surface can make it easier for the solution to foam.

[0035] The top surface of the connection box 2 is fixedly connected to a cover 3, and the bottom surface of the connection box 2 is fixedly connected to a box bottom plate 4. A connection valve 5 is fixedly installed on the top surface of the connection box 2, and an electric control valve 6 is fixedly installed in the middle of the bottom surface of the box bottom plate 4. The user can inject BTP (2-bromo-3,3,3-trifluoropropylene) through the connection valve 5 to enhance the fire extinguishing effect of the mixed gas and liquid;

[0036] A discharge head 8 is fixedly mounted on the bottom surface of the mixing tube 7, a connecting frame 9 is provided inside the mixing tube 7, an oblique block 10 is symmetrically fixedly connected to the side surface of the connecting frame 9, the oblique block 10 is fixedly connected to the mixing tube 7, a feeding head 11 is spirally connected to the top surface of the mixing tube 7, a liquid inlet pipe 12 is fixedly connected to the side surface of the feeding head 11, an air inlet pipe 13 is fixedly connected to the side surface of the feeding head 11 away from the liquid inlet pipe 12, and a liquid infusion pipe is fixedly connected to the output end of the liquid inlet pipe 12;

[0037] The top surface of the connecting frame 9 is fixedly connected with a guide tube, which is fixedly connected to the infusion tube. The bottom surface of the connecting frame 9 is fixedly connected with a drainage tube. A semi-sealed block is embedded and fixedly connected inside the drainage tube. An embedded groove 14 is provided inside the mixing tube 7. Before the foaming agent is mixed with the clean water, it is necessary to control the nitrogen gas to aerate and atomize the foaming agent. During the operation, the nitrogen gas enters from the air inlet pipe 13 and enters the mixing tube 7 tangentially using the inclined block 10. For the foaming agent injected into the liquid inlet pipe 12, the high-pressure and rotary-cut nitrogen gas can atomize it, disperse the foaming agent as much as possible, and enable it to be fully mixed with water to produce foam, thereby achieving a fire extinguishing effect.

[0038] The bearing sleeve 15 is fixedly connected to the embedding groove 14. The interior of the bearing sleeve 15 is rotatably connected to a connecting sleeve 16. The inner surface of the connecting sleeve 16 is fixedly connected to an arc-shaped blade 17. The surface of the arc-shaped blade 17 is fixedly connected to a docking tube 18. The surface of the docking tube 18 is fixedly connected to a sealing block 19. During the aeration atomization operation, the nitrogen gas blown into the mixing tube 7 by rotary cutting can drive the arc-shaped blade 17, causing the connected docking tube 18 to rotate continuously, and the sealing block 19 will also rotate together. When the sealing block 19 is opposite to the semi-sealing block, the drainage tube will be blocked, resulting in the foaming agent being unable to flow out, so that the foaming agent can be intermittently injected to enhance the aeration effect.

[0039] A through groove is provided inside the arc frame 20, which is connected to the water outlet 22. The surface of the cutting surface is symmetrically fixedly connected with a protrusion 24, which is engaged with the rotating rod 25. The side surface of the collar 23 away from the cutting surface is fixedly connected with a nozzle. The surfaces of the two collars 23 are fixedly connected with a linkage gear 29. As the collars 23 continue to rotate, the nozzles on their surfaces can continuously surround the connecting section 21 to spray clean water, so that the clean water and the atomized foaming agent are fully mixed;

[0040] The side surface of the docking frame 30 is fixedly connected to the welding frame 31, and the interior of the docking frame 30 and the welding frame 31 is provided with a water inlet hole 32, which is docked with the through groove. The two long side surfaces of the docking frame 30 are symmetrically fixedly connected to the side support rods 33, and the surface of the side support rods 33 is fixedly connected to the motor 34. One end surface of the motor 34 is fixedly installed with a connecting disk 35. The interior of the connecting disk 35 is located at the output end of the motor 34 and is fixedly connected to a transmission gear. The transmission gear and the linkage gear 29 are meshed and connected. The filling of clean water is mainly done by pumping water in from the outside, and then cooperating with the water inlet hole 32 to flow into the through groove to complete the water filling operation. In order to ensure that each ring 23 can rotate stably, the symmetrically arranged motor 34 can use the transmission gear to drive the linkage gear 29 to rotate. Under the cooperation of the protrusion 24, the rotating rod 25 and the docking rod 26, the other rings 23 that are not directly connected to the linkage gear 29 will also rotate together.

[0041] A linkage disk 37 is fixedly installed on the top surface of the gradual expansion frame 36, and a motor 38 is fixedly installed on the bottom surface of the linkage disk 37. The interior of the linkage disk 37 is symmetrically connected to a rotating wheel, and the surface of the rotating wheel is sleeved with a belt, one of the rotating wheels is fixedly connected to the output end of the motor 38, and an anti-slip frame 41 is fixedly installed on the interior of the gradual expansion frame 36. The surface of the anti-slip frame 41 is rotatably connected to a stirring shaft 39, and another rotating wheel is fixedly connected to the stirring shaft 39. The side surface of the stirring shaft 39 is equidistantly fixed with stirring blades 40, and the bottom surface of the gradual expansion frame 36 is fixedly connected to a water pipe, and one end of the water pipe is fixedly connected to a nozzle 42. The user can start the motor 38 to link the stirring shaft 39 for stirring the mixed gas and liquid entering the gradual expansion frame 36, so that the mixed gas and liquid are mixed for the last time before being sprayed out, and then can be introduced from the water pipe into the nozzle 42 for fire extinguishing.

[0042] A fire extinguishing method using a foam fire extinguishing device, comprising the following steps:

[0043] First, the foaming agent and nitrogen are introduced into the mixing tube 7 through the liquid inlet pipe 12 and the air inlet pipe 13 respectively. Under the guidance of the inclined block 10, the high-pressure nitrogen will atomize the foaming agent and disperse it into a mist. Then, the foaming agent enters the connection box 2 together. Then, the user injects BTP through the connecting valve 5;

[0044] Second, the paddle 27 on the surface of the arc frame 20 is used to stir the mixed solution, and the holes 28 on the surface can easily generate small bubbles;

[0045] 3. After the mixed gas and liquid are introduced into the gradually expanding frame 36 , they are further stirred by the stirring shaft 39 , and then the user can extinguish the fire at the ignition point through the nozzle 42 .

[0046] The working principle of the present invention is as follows: after the atomized foaming agent enters the connecting box 2, the user can inject clean water into the arc frame 20, and then the water is sprayed out from the water outlet 22 and mixed with the foaming agent. Under the rotation of the ring 23, the rotating rod 25 will drive the docking rod 26 to stir the mixed gas and liquid. The paddle 27 can enhance the stirring amplitude, and the holes and grooves 28 on its surface can facilitate the foaming of the solution. Before the foaming agent is mixed with the clean water, it is necessary to control the nitrogen to atomize the foaming agent. During the operation, the nitrogen enters from the air inlet pipe 13 and enters the mixing pipe 7 tangentially through the inclined block 10. For the foaming agent injected into the liquid inlet pipe 12, the high-pressure and rotary-cut nitrogen can atomize it, disperse the foaming agent as much as possible, enable it to be fully mixed with water to produce foam, thereby achieving a fire extinguishing effect. During the atomization operation, the nitrogen blown into the mixing pipe 7 can drive the arc blade 17, so that The connected docking pipe 18 rotates continuously, and the sealing block 19 will also rotate together. When the sealing block 19 is opposite to the semi-sealing block, the drainage pipe will be blocked, resulting in the foaming agent unable to flow out, so that the foaming agent can be injected intermittently to enhance the aeration effect. The addition of clean water is mainly to pump water from the outside, and then flow into the through groove in conjunction with the water inlet hole 32 to complete the water adding operation. In order to ensure that each ring 23 can rotate stably, the symmetrically arranged motor 34 can use the transmission gear to drive the linkage gear 29 to rotate. Under the cooperation of the protrusion 24, the rotating rod 25 and the docking rod 26, the other rings 23 that are not directly connected to the linkage gear 29 will also rotate together. The mixed gas and liquid entering the gradually expanding frame 36 can be stirred by the user by starting the motor 38 to link the stirring shaft 39, so that the mixed gas and liquid are mixed one last time before being sprayed out, and then can be introduced into the nozzle 42 from the water pipe for fire extinguishing.

[0047] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A foam fire extinguishing device, comprising a bracket (1), characterized in that: A connection box (2) is fixedly mounted near the top of the bracket (1), a mixing tube (7) is fixedly mounted on the top surface of the connection box (2), a bearing sleeve (15) is embedded and fixed inside the mixing tube (7), an arc frame (20) is fixedly mounted near the middle of the connection box (2), both ends of the arc frame (20) are fixedly connected to docking frames (30), and a gradually expanding frame (36) is fixedly mounted at the lower end of the connection box (2) inside the bracket (1); The side surface of the arc frame (20) is symmetrically fixedly connected to a connecting joint (21), the side surface of the connecting joint (21) is provided with a water outlet hole (22), the surface of the connecting joint (21) is sleeved and connected to a collar (23), the side surface of the collar (23) is provided with a cutting surface, the surface of the cutting surface is provided with a rotating rod (25), the side surface of the rotating rod (25) is fixedly connected to a docking rod (26), the surface of the docking rod (26) is fixedly connected to a paddle (27), and the surface of the paddle (27) is provided with a hole groove (28).

2. A foam fire extinguishing device according to claim 1, characterized in that: The top surface of the connection box (2) is fixedly connected to a cover (3), the bottom surface of the connection box (2) is fixedly connected to a box bottom plate (4), the top surface of the connection box (2) is fixedly mounted with a connection valve (5), and the bottom surface of the box bottom plate (4) is fixedly mounted with an electric control valve (6) in the middle.

3. A foam fire extinguishing device according to claim 1, characterized in that: A discharge head (8) is fixedly mounted on the bottom surface of the mixing tube (7), a connecting frame (9) is provided inside the mixing tube (7), a symmetrically fixed oblique block (10) is connected to the side surface of the connecting frame (9), the oblique block (10) is fixedly connected to the mixing tube (7), a feeding head (11) is spirally connected to the top surface of the mixing tube (7), a liquid inlet pipe (12) is fixedly connected to the side surface of the feeding head (11), an air inlet pipe (13) is fixedly connected to the side surface of the feeding head (11) away from the liquid inlet pipe (12), and a liquid infusion pipe is fixedly connected to the output end of the liquid inlet pipe (12).

4. A foam fire extinguishing device according to claim 3, characterized in that: The top surface of the connecting frame (9) is fixedly connected to a guide tube, and the guide tube is fixedly connected to the infusion tube. The bottom surface of the connecting frame (9) is fixedly connected to a drainage tube, and a semi-sealed block is embedded and fixedly connected inside the drainage tube. The interior of the mixing tube (7) is provided with an embedding groove (14).

5. A foam fire extinguishing device according to claim 4, characterized in that: The bearing sleeve (15) is fixedly connected to the embedding groove (14); the bearing sleeve (15) is rotatably connected to a connecting sleeve (16) inside; the inner surface of the connecting sleeve (16) is fixedly connected to an arc-shaped blade (17); the surface of the arc-shaped blade (17) is fixedly connected to a butt joint (18); and the surface of the butt joint (18) is fixedly connected to a sealing block (19).

6. A foam fire extinguishing device according to claim 1, characterized in that: A through groove is provided inside the arc frame (20), and the through groove is connected to the water outlet hole (22). The surface of the cutting surface is symmetrically fixedly connected with a protrusion (24), and the protrusion (24) is clamped with the rotating rod (25). The side surface of the collar (23) away from the cutting surface is fixedly connected with a nozzle, and the surfaces of the two collars (23) are fixedly connected with a linkage gear (29).

7. A foam fire extinguishing device according to claim 6, characterized in that: The side surface of the docking frame (30) is fixedly connected to a welding frame (31); a water inlet hole (32) is provided inside the docking frame (30) and the welding frame (31); the water inlet hole (32) is docked with the through groove; two long side surfaces of the docking frame (30) are symmetrically fixedly connected to side support rods (33); the surface of the side support rods (33) is fixedly connected to a motor (34); a connection disk (35) is fixedly mounted on one end surface of the motor (34); a transmission gear is fixedly connected to the output end of the motor (34) inside the connection disk (35); the transmission gear is meshed with the linkage gear (29).

8. A foam fire extinguishing device according to claim 1, characterized in that: A linkage disk (37) is fixedly mounted on the top surface of the gradually expanding frame (36), a motor (38) is fixedly mounted on the bottom surface of the linkage disk (37), a rotating wheel is symmetrically rotatably connected inside the linkage disk (37), a belt is sleeved on the surface of the rotating wheel, one of the rotating wheels is fixedly connected to the output end of the motor (38), an anti-slip frame (41) is fixedly mounted inside the gradually expanding frame (36), a stirring shaft (39) is rotatably connected to the surface of the anti-slip frame (41), another rotating wheel is fixedly connected to the stirring shaft (39), a stirring blade (40) is equidistantly fixedly connected to the side surface of the stirring shaft (39), a water pipe is fixedly connected to the bottom surface of the gradually expanding frame (36), and a nozzle (42) is fixedly connected to one end of the water pipe.

9. A fire extinguishing method according to any one of claims 1 to 8, characterized in that: The specific steps include:

1. The foaming agent and nitrogen are introduced into the mixing tube (7) through the liquid inlet pipe (12) and the air inlet pipe (13) respectively. Under the guidance of the inclined block (10), the high-pressure nitrogen will atomize the foaming agent and disperse it into a mist. Then, the foaming agent enters the connection box (2) together. Then, the user injects BTP through the connection valve (5); Second, the paddle (27) on the surface of the arc-shaped frame (20) is activated to stir the mixed solution, and the holes (28) on the surface can easily generate small bubbles; 3. After the mixed gas and liquid are introduced into the gradually expanding frame (36), the mixing shaft (39) is used to further stir the mixed gas and liquid, and then the user can extinguish the fire at the fire point through the nozzle (42).

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