Integrated fire suppression compressed air foam system

Abstract

The application belongs to the technical field of fire-fighting equipment, and particularly relates to an integrated fire-fighting compressed air foam extinguishing device, which comprises a tank body, a fixed cylinder fixed at the left side of the inner cavity of the tank body, a rectangular rod arranged in the fixed cylinder, a rotating cylinder arranged at the right side of the fixed cylinder, stirring blades arranged uniformly on the outer side of the rotating cylinder, liquid outlet pipes fixed at the top and bottom of the fixed cylinder, first liquid grooves formed on the two sides of the fixed cylinder facing the liquid outlet pipes, a sealing block arranged in the fixed cylinder, a moving block arranged in the rotating cylinder, an air groove formed in the rectangular rod at the right side of the moving block, a cylindrical groove formed in the moving block, sliding holes arranged uniformly at the right side of the cylindrical groove and inserted rods sliding in the sliding holes through springs, and a spiral groove formed in the inner ring of the rotating cylinder at the left side of the moving block. The fire extinguishing device can avoid the sequence of water and liquid being sprayed in turn, so that the fire extinguishing effect cannot be achieved and the rescue opportunity is delayed.

Description

Technical Field

[0001] This invention belongs to the field of fire protection equipment technology, specifically an integrated fire-fighting compressed air foam extinguishing device. Background Technology

[0002] Compressed air foam fire extinguishing technology, with its advantages of high efficiency, water conservation, and resistance to reignition, has become one of the core technologies in modern fire protection. Among them, the premixed pressurized wheeled compressed air foam fire extinguishing device, as a medium-sized mobile fire-fighting equipment, fills the gap between the insufficient fire-fighting capacity of small backpack fire extinguishers and the limited mobility of large vehicle-mounted fire trucks. This type of device requires no external power or water source, can quickly respond to initial fires, and is widely used in substations, oil depots, chemical workshops, underground garages, and other locations where fire trucks cannot reach them immediately, making it an important first-response fire-fighting equipment.

[0003] The core structure of this device is integrated into a steel trolley frame equipped with wheels for easy on-site movement and adaptability to various complex ground environments. At the center of the frame is a sealed pressure vessel containing a pre-mixed solution of water and foam concentrate, prepared in a specific ratio. A high-pressure gas cylinder assembly is integrated at the top of the vessel, providing all the power required for foaming and spraying, eliminating the need for an external power source or water pump. A dedicated gas-liquid mixing chamber and foaming assembly are located at the end of the vessel's outlet pipeline, responsible for thoroughly mixing the pre-mixed solution with compressed air and converting it into fine and stable fire-extinguishing foam. The entire device is compact in structure and relatively simple to operate.

[0004] When using this device, the operator first pushes it to a safe position at a suitable distance from the fire, quickly connects the water hose and foam nozzle, and then slowly opens the cylinder valve. High-pressure air, after being adjusted to the working pressure by the pressure reducer, is divided into two paths: one enters the tank space to apply uniform pressure to the pre-mixed liquid inside; the other is directly introduced into the gas-liquid mixing chamber. Under the action of air pressure, the pre-mixed liquid inside the tank is forced out from the bottom outlet pipe, enters the gas-liquid mixing chamber along the pipeline, and initially mixes with the compressed air. Then, through the shearing action of the foaming component, homogeneous foam is formed. Pulling the nozzle trigger allows for spraying directly at the base of the flames. After extinguishing the fire, the cylinder valve must be closed, the remaining pressure in the pipeline released, the residual liquid in the tank and pipeline emptied, and the tank and pipeline rinsed with clean water for future use.

[0005] However, when the device is left unused for an extended period, the inherent density difference between the foam concentrate and water causes the initially homogeneous mixture to gradually separate under gravity, forming a distinct three-layer structure: the upper layer is primarily composed of the less dense foam concentrate, the lower layer is mainly water with a higher density, and the middle layer is a transitional layer with gradually changing concentration. Even more insidiously, this stratification cannot be detected through routine visual inspections, pressure gauge readings, or short-term test sprays. This is because the level gauge only displays the total liquid volume, and short-term test sprays only remove a small amount of liquid from the bottom of the tank, easily misleading operators into believing the device is operating normally.

[0006] In the event of a fire, the pre-mixed foam, after being layered, is sprayed out sequentially in a "water first, then liquid" order. The initial spray is almost entirely pure water without any foam concentrate, which is completely ineffective in forming an oxygen-barrier layer, thus wasting the golden window for initial fire suppression. The subsequent transition layer has an extremely unstable concentration, with inconsistent foam quality, only able to extinguish surface flames and unable to penetrate deep into the burning material, making it highly susceptible to reignition while being extinguished. The final spray of high-concentration foam concentrate has extremely poor foaming ability, forming a viscous paste that is ineffective in extinguishing the fire, further delaying rescue efforts and ultimately causing the fire to spread and expand. Summary of the Invention

[0007] To overcome the shortcomings of existing technologies and solve the aforementioned technical problems, this invention proposes an integrated fire-fighting compressed air foam extinguishing device. By setting up the extinguishing device, the sequential spraying of water followed by liquid can be avoided, which would prevent the device from being used to extinguish the fire and delay rescue opportunities. The specific structure is as follows. An integrated fire-fighting compressed air foam extinguishing device includes a tank; a gas-liquid mixing chamber is installed on the top of the tank; a fixing cylinder is fixed to the left side of the tank's inner cavity; a rectangular rod is provided inside the fixing cylinder and fixed to the side wall of the tank; the rectangular rod extends to the right side of the tank's inner cavity. A rotating cylinder is provided on the right side of the fixed cylinder; a thin cylinder is fixed to the right end of the rotating cylinder, and the thin cylinder passes through the tank body and is rotatably connected to the tank body. A cylinder is fixed to the right side of the rectangular rod, and the cylinder extends out of the thin cylinder; the right side of the cylinder is closed; a connector is fixed to the side of the cylinder that extends out of the thin cylinder; an air intake assembly is installed at the bottom of the tank; and evenly arranged stirring blades are fixed to the outside of the rotating cylinder. The top and bottom of the fixed cylinder are both fixed with liquid outlet pipes, and the upper liquid outlet pipe extends into the gas-liquid mixing chamber; the fixed cylinder has first liquid grooves on both sides facing the liquid outlet pipes; the rectangular rod has through holes, and the through holes are opposite to the first liquid grooves. The fixed cylinder is equipped with a sealing block, which slides on a rectangular rod; a spring is connected to the left side of the sealing block, and the other side of the spring is fixed to the tank body; a first retaining ring is fixed to the left side of the sealing block, located on the fixed cylinder. The rotating cylinder is equipped with a sliding block that slides on a rectangular rod; the sliding block is located on the left side of the cylinder; an air groove is provided on the right side of the sliding block inside the rectangular rod, and the air groove passes through the upper and lower sides of the rectangle and communicates with the cylinder. The moving block has a cylindrical groove, and the diameter of the cylindrical groove is the same as the inner diameter of the liquid outlet pipe; a uniformly arranged sliding hole is provided on the right side of the cylindrical groove, and a rod is slidably inserted in each sliding hole by a spring. The left side of the moving block has a spiral groove located on the inner ring of the rotating cylinder.

[0008] In a preferred embodiment of the present invention, the tank contains a pre-mixed solution of water and foam concentrate; The tank is mounted on a vehicle frame; wheels are mounted on the bottom of the vehicle frame; an inlet valve is mounted on the top of the tank, and an outlet valve is mounted on the bottom of the tank. Two gas cylinders are installed on the top of the tank, and the gas cylinders store compressed air; the connector is connected to the gas cylinders through a gas pipe; the air inlet assembly is connected to the gas cylinders through a gas pipe. A connector is installed on the left side of the gas-liquid mixing chamber. The connector is used to connect the water hose and the spray gun. One of the gas cylinders is connected to the gas-liquid mixing chamber via a gas tube.

[0009] In a preferred embodiment of the present invention, a pulley is fixed to one side of the thin tube extending to the outlet tank; A common shaft is fixed between the two wheels below the cylinder; a worm gear is fixed in the middle of the shaft; a turbine gear meshes above the worm gear. The turbine is provided with mounting plates on both sides, and the turbine rotates on the mounting plates on both sides via a rotating rod; pulleys are also installed on the rotating rod, and a belt connects the two pulleys.

[0010] In a preferred embodiment of the present invention, a winding rod is rotatably located inside the cylinder on the right side of the joint; A steel wire rope is wound on the winding rod, and the steel wire rope passes through the cylinder and the air groove and is fixed to the side of the moving block; a crank is fixed to one end of the winding rod located on the outside of the cylinder; the winding rod is rotatably connected to the cylinder in a sealed manner. A second retaining ring is fixed to the right side of the moving block; a gap is left between the spiral groove and the moving block; a slope is opened at the end of the spiral groove near the moving block.

[0011] In a preferred embodiment of the present invention, two opposing auger blades are fixed on the outer ring of the rotating drum, and the auger blades are arranged in a mirror image.

[0012] In a preferred embodiment of the present invention, the air intake assembly includes an air chamber, and the air chamber is connected to an air cylinder via an air pipe. The gas chamber has evenly distributed air holes on the tank body above it, and one-way valves are installed in the air holes.

[0013] In a preferred embodiment of the present invention, an outer ring is provided on the outer surface of the fixed cylinder and the rotating cylinder on the side opposite to the rotating cylinder; The outer ring is fixed to the rotating drum; the inner ring of the outer ring is provided with a sealing ring, which seals the contact area between the fixed drum and the rotating drum.

[0014] In a preferred embodiment of the present invention, a first rotating ring is provided on the left side of the outer ring, and the first rotating ring is fixed to the outer ring of the fixed cylinder; The outer ring of the first rotating ring is provided with a first annular groove; a second liquid groove is provided on the side of the first annular groove facing the two first liquid grooves; The first annular groove contains two rotating sealing rings, which are connected by a fixing plate; the outer rings of the two rings are provided with a second rotating ring, and the inner ring of the second rotating ring is provided with a second annular groove, and the sealing rings rotate within the second annular groove; The upper outlet pipe is fixed to the top of the second rotating ring and communicates with the second ring groove; the lower outlet pipe is fixed to the bottom of the second rotating ring and communicates with the second ring groove. The second rotating ring has a connecting plate fixed to its side, and the connecting plate is fixed to the tank body; the outer ring has an L-shaped plate fixed to its outer circumference, and the other side of the L-shaped plate is fixed to the ring piece on the right side.

[0015] In a preferred embodiment of the present invention, uniformly arranged paddles are fixed on the ring plate located on the left side; A column is fixed inside the first annular groove, and a fixing plate is fixed on the column.

[0016] The beneficial effects of this invention are as follows: 1. The integrated compressed air foam extinguishing device of the present invention uses gas to drive the moving block, which in turn drives the rotating drum and stirring plate to rotate. This achieves automatic mixing first, and only after the mixture is fully mixed can the liquid outlet be connected to spray uniform foam. This ensures that the sprayed mixture is foam, thus avoiding the sequential spraying of water first and then liquid. In such cases, the initial spray is almost pure water without foam concentrate, which cannot form an effective oxygen barrier layer, resulting in the complete waste of the golden window for initial fire extinguishing. The concentration of the subsequent transition layer is extremely unstable, and the foam quality is inconsistent, only able to extinguish surface flames and unable to penetrate into the burning material, making it prone to reignition while extinguishing. Finally, the high-concentration foam concentrate sprayed has extremely poor foaming ability, forming a viscous slurry that cannot extinguish the fire, further delaying the rescue opportunity and ultimately causing the fire to spread and expand.

[0017] 2. The integrated fire-fighting compressed air foam extinguishing device of the present invention, through the combination of multi-circle spiral grooves and insert rods, can transform the short-distance linear motion of the moving block into the multi-circle rotational motion of the rotating drum. This achieves a sufficient stirring effect within the limited internal space of the tank, ensuring that the layered mixtures at various depths and positions within the tank can be remixed uniformly. Simultaneously, the liquid outlet passage only opens after the stirring process is complete and the moving block has moved to the designated position, thus ensuring that the sprayed liquid is a pre-mixed mixture. This avoids problems such as unstable foam quality, poor extinguishing effect, and combustion-supporting effects caused by uneven mixing.

[0018] 3. The integrated fire-fighting compressed air foam extinguishing device of the present invention, by adding a wheel-linked mechanical transmission stirring system, forms a dual stirring mechanism with the original gas-driven stirring system, further solving the technical problem of insufficient single-time stirring when the premixed liquid is severely stratified, and greatly improving the reliability and adaptability of the device; for premixed liquids that have been standing for several months and have extremely severe stratification, the wheel-linked stirring system can use the entire movement time to continuously pre-stir during the movement to the fire scene, pre-mixing the upper foam concentrate, the middle transition layer and the lower water layer in advance, greatly reducing the difficulty of subsequent gas stirring and shortening the overall stirring time. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a perspective view of the fire extinguishing device of the present invention; Figure 2 This is a perspective view of the fire extinguishing device of the present invention from another angle; Figure 3 This is a diagram of the internal structure of the tank in this invention; Figure 4 This is a structural diagram showing the separation of the first rotating ring, the ring plate, and the second rotating ring in this invention; Figure 5 This is a diagram showing the internal structure of the fixed cylinder and the rotating cylinder in this invention; Figure 6 This is the present invention. Figure 5 Enlarged view of a portion of point A in the middle; Figure 7 This is a top view of the fire extinguishing device of the present invention; Figure 8 This is the present invention. Figure 7 Cross-sectional view of section BB before the moving block is moved; Figure 9 This is the present invention. Figure 8 Enlarged view of a section at point C; Figure 10This is the present invention. Figure 8 Enlarged view of a section at point D; Figure 11 This is the present invention. Figure 8 Enlarged view of a section at point E in the middle; Figure 12 This is the present invention. Figure 7 Cross-sectional view of section BB after the center block has been moved; Figure 13 This is the present invention. Figure 12 Enlarged view of a section at point F.

[0021] In the diagram: 1. Tank body; 11. Gas-liquid mixing chamber; 12. Vehicle frame; 13. Wheel; 14. Gas cylinder; 15. Pulley; 16. Worm gear; 17. Turbine; 18. Belt; 2. Fixed cylinder; 21. Rectangular rod; 221. Through hole; 222. Gas groove; 22. Cylinder; 23. Connector; 24. Liquid outlet pipe; 25. First liquid groove; 26. Sealing block; 27. First retaining ring; 3. Rotating cylinder; 31. Thin cylinder; 32. Stirring blade; 33. Moving block 34. Columnar groove; 35. Insert rod; 36. Spiral groove; 37. Screwdriver plate; 4. Winding rod; 41. Steel wire rope; 42. Second retaining ring; 43. Inclined slope; 5. Air chamber; 51. Air hole; 6. Outer ring; 61. First rotating ring; 62. First ring groove; 63. Second liquid tank; 64. Ring plate; 641. Fixing plate; 65. Second rotating ring; 66. Second ring groove; 67. Connecting plate; 68. Paddle; 7. Column; 71. Fixing plate. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] like Figures 1 to 13 As shown, the integrated fire-fighting compressed air foam extinguishing device of the present invention, as an embodiment of the present invention, includes a tank 1; a gas-liquid mixing chamber 11 is installed on the top of the tank 1; a fixing cylinder 2 is fixed in the inner cavity of the tank 1 at the left side position; a rectangular rod 21 is provided inside the fixing cylinder 2, and the rectangular rod 21 is fixed on the side wall of the tank 1; the rectangular rod 21 extends to the right side position of the inner cavity of the tank 1. A rotating cylinder 3 is provided on the right side of the fixed cylinder 2; a thin cylinder 31 is fixed at the right end of the rotating cylinder 3, and the thin cylinder 31 passes through the tank body 1 and is rotatably connected to the tank body 1. A cylinder 22 is fixed to the right side of the rectangular rod 21, and the cylinder 22 extends out of the thin cylinder 31; the right side of the cylinder 22 is closed; a connector 23 is fixed to the side of the cylinder 22 that extends out of the thin cylinder 31; an air intake assembly is installed at the bottom of the tank body 1; and evenly arranged stirring blades 32 are fixed to the outside of the rotating cylinder 3. The top and bottom of the fixed cylinder 2 are both fixed with liquid outlet pipes 24, and the upper liquid outlet pipe 24 extends into the gas-liquid mixing chamber 11; the fixed cylinder 2 has first liquid grooves 25 on both sides facing the liquid outlet pipes 24; the rectangular rod 21 has through holes 221, and the through holes 221 are opposite to the first liquid grooves 25. The fixed cylinder 2 is provided with a sealing block 26, and the sealing block 26 slides on the rectangular rod 21; a spring is connected to the left side of the sealing block 26, and the other side of the spring is fixed to the tank body 1; a first retaining ring 27 is fixed to the left side of the sealing block 26, located in the fixed cylinder 2; The rotating cylinder 3 is provided with a moving block 33, which slides on the rectangular rod 21; the moving block 33 is located on the left side of the cylinder 22; the right side of the moving block 33 is provided with an air groove 222 inside the rectangular rod 21, which passes through the upper and lower sides of the rectangle and communicates with the cylinder 22. The moving block 33 is provided with a cylindrical groove 34, and the diameter of the cylindrical groove 34 is the same as the inner diameter of the liquid outlet pipe 24; a uniformly arranged sliding hole is provided on the right side of the cylindrical groove 34, and a rod 35 is slidably inserted in each sliding hole by a spring. The left side of the moving block has a spiral groove 36 located on the inner ring of the rotating cylinder 3.

[0024] In this embodiment, the tank 1 contains a pre-mixed solution of water and foam concentrate; The tank body 1 is mounted on the vehicle frame 12; the bottom of the vehicle frame 12 is equipped with wheels 13; the top of the tank body 1 is equipped with an inlet valve, and the bottom of the tank body 1 is equipped with an outlet valve. Two gas cylinders 14 are installed on the top of the tank body 1, and the gas cylinders 14 store compressed air; the connector 23 is connected to the gas cylinders 14 through a gas pipe; the air inlet assembly is connected to the gas cylinders 14 through a gas pipe. A connector is installed on the left side of the gas-liquid mixing chamber 11. The connector is used to connect the water hose and the spray gun. One of the gas cylinders 14 is connected to the gas-liquid mixing chamber 11 via a gas pipe.

[0025] During implementation, in the event of a fire, the operator pushes the fire extinguishing device installed on the vehicle frame 12, then connects the water hose and spray gun, and opens the valve of the gas cylinder 14; the high-pressure compressed air in the gas cylinder 14 will be distributed to the gas-liquid mixing chamber 11, the air intake assembly and the connector 23 through different pre-laid air pipes, providing all the power for the operation of the entire system. Specifically, when compressed air enters the air intake assembly, it is introduced into the internal space of the tank 1, applying a continuous and stable pressure to the pre-mixed liquid of water and foam concentrate stored in the tank 1, preparing for subsequent liquid delivery. Simultaneously, after entering the connector 23, the compressed air flows into the cylinder 22 fixedly connected to the connector 23. Since the right side of the cylinder 22 is a closed structure, the gas can only enter the closed space on the right side of the moving block 33 through the air groove 222 opened inside the rectangular rod 21. As more gas enters the space on the right side of the moving block 33, the air pressure continuously increases, gradually pushing the moving block 33 to move smoothly to the left along the rectangular rod 21. When the moving block 33 moves to the position of the spiral groove 36 opened on the inner ring of the rotating cylinder 3, the insert rod 35 in the sliding hole aligned with the spiral groove 36 on the moving block 33 will pop out under the push of its own spring, inserting into the spiral groove 36. Inside the spiral groove 36; then the insert rod 35 continues to move to the left following the moving block 33, and moves along the spiral trajectory of the spiral groove 36; because the insert rod 35 is restricted by the side wall of the spiral groove 36, it will generate a circumferential component force while moving in a straight line. This component force will push the rotating drum 3 to rotate around the axis of the rectangular rod 21; when the rotating drum 3 rotates, it will drive the uniformly arranged stirring blades 32 fixed on its outer side to rotate synchronously. The stirring blades 32 continuously stir in the pre-mixed liquid in the tank 1, and re-shear and mix the already stratified upper foam original liquid, middle transition layer and lower water layer to form a uniform and stable pre-mixed liquid; because the spiral groove 36 in the inner ring of the rotating drum 3 is designed with multiple turns, the moving block 33 can drive the rotating drum 3 and the stirring blades 32 to rotate multiple turns within a limited straight stroke, thereby ensuring that the mixture in each position in the tank 1 can be fully stirred and eliminating the stratification phenomenon; More specifically, when the moving block 33 is pushed by compressed air to the position where it fits against the sealing block 26, it will cause the sealing block 26 to continue moving to the left, compressing the spring connected to the left side of the sealing block 26. When the sealing block 26 moves to the left and fits against the first retaining ring 27 fixed to its left side, the sealing block 26 is blocked by the first retaining ring 27 and stops moving. At this time, the moving block 33 also stops moving. At the instant the moving block 33 stops, the cylindrical groove 34 on the moving block 33 is completely aligned with the through hole 221 on the rectangular rod 21, and also completely aligned with the first liquid groove 25 on the fixed cylinder 2. Since the first liquid groove 25 on the fixed cylinder 2 is already opposite to the upper and lower liquid outlet pipes 24 in the initial state, the liquid outlet passage in the tank 1 is officially and completely connected at this time. After the liquid outlet passage is connected, the pre-mixed liquid that has been fully stirred in the tank 1 is pressurized in the tank 1. Under the pressure of compressed air, it first enters the lower outlet pipe 24, then flows into the cylindrical groove 34 of the moving block 33 through the first liquid groove 25 at the bottom of the fixed cylinder 2, then enters the upper part of the cylindrical groove 34 through the through hole 221 on the rectangular rod 21, then enters the upper outlet pipe 24 through the first liquid groove 25 at the top of the fixed cylinder 2, and finally flows into the gas-liquid mixing chamber 11 installed at the top of the tank 1 through the upper outlet pipe 24. Since the gas-liquid mixing chamber 11 is connected to one of the gas cylinders 14 through the gas pipe, the uniform mixture entering the gas-liquid mixing chamber 11 will be fully mixed with the compressed air here. After the action of the foaming component inside the gas-liquid mixing chamber 11, it forms a fine and stable fire extinguishing foam, which is finally sprayed to the root of the fire source through the water hose and spray gun to achieve efficient fire extinguishing operation until the fire is completely extinguished or all the mixture in the tank 1 is used up. Furthermore, after the fire is extinguished or the mixture in tank 1 is used up, the operator first closes the valve of gas cylinder 14 to cut off the supply of compressed air; then the remaining liquid in tank 1 can be drained through the liquid outlet valve at the bottom of tank 1, and the prepared water and foam concentrate premixed mixture can be refilled into tank 1 through the liquid inlet valve at the top of tank 1, and the compressed air in gas cylinder 14 can be replenished. The device can then be restored to standby status and wait for the next use. Furthermore, by using gas to move the movable block 33, which in turn drives the rotating drum 3 and the stirring plate 32 to rotate, automatic stirring and mixing are achieved first. Only after the mixture is mixed can the liquid outlet passage be connected, allowing for the spraying of uniform foam. This ensures that the sprayed mixture is foam, thus avoiding the sequential spraying of water first and then liquid. In such cases, the initial spray is almost pure water without foam concentrate, which cannot form an effective oxygen barrier layer, resulting in the complete waste of the golden window for initial fire extinguishing. Subsequently, the concentration of the sprayed transition layer is extremely unstable, with foam quality varying from good to bad. It can only extinguish surface flames and cannot penetrate into the burning material, making it prone to reignition while being extinguished. Finally, the high-concentration foam concentrate sprayed has extremely poor foaming ability, forming a viscous slurry that cannot extinguish the fire, further delaying the rescue opportunity and ultimately causing the fire to spread and expand. Meanwhile, by setting up a multi-turn spiral groove 36 and a plug rod 35 in combination, the short-distance linear motion of the moving block 33 can be transformed into the multi-turn rotational motion of the rotating drum 3, achieving a sufficient stirring effect within the limited internal space of the tank 1, ensuring that the layered mixtures at various depths and positions within the tank 1 can be remixed evenly; at the same time, the liquid outlet passage will only open after the stirring process is completed and the moving block 33 has moved to the designated position, thereby ensuring that the sprayed liquid is a mixed pre-mixed liquid, avoiding problems such as unstable foam quality, poor fire extinguishing effect, and high-concentration foam concentrate aiding combustion caused by uneven mixing.

[0026] As one embodiment of the present invention; a pulley 15 is fixed to one side of the thin tube 31 extending to the outlet tank 1; A rotating shaft is fixed between the two wheels 13 below the cylinder 22; a worm gear 16 is fixed in the middle of the rotating shaft; a turbine 17 is engaged above the worm gear 16; The turbine 17 is provided with mounting plates on both sides, and the turbine 17 rotates on the mounting plates on both sides via a rotating rod; pulleys 15 are also installed on the rotating rod, and a belt 18 is connected between the two pulleys 15.

[0027] During implementation, as the fire extinguishing device mounted on the vehicle frame 12 is propelled to the fire scene, the wheels 13 at the bottom of the vehicle frame 12 will rotate as the device moves. The rotating wheels 13 will drive the rotating shaft fixed between the two wheels 13 to rotate synchronously. When the rotating shaft rotates, it will drive the worm 16 fixed in the middle to rotate together. Since a turbine 17 is meshed above the worm 16, the rotating worm 16 will drive the turbine 17 to rotate around the axis of the rotating rod. The turbine 17 is rotatably connected to the mounting plates on both sides through the rotating rod. A pulley 15 is also mounted on the rotating rod. A belt 18 is connected between the pulley 15 and the pulley 15 extending from the thin cylinder 31 to the outside of the tank 1. Specifically, when the turbine 17 rotates, it drives the pulley 15 on it to rotate via the rotating rod. The rotating pulley 15 drives the pulley 15 on the thin cylinder 31 to rotate synchronously via the belt 18, thereby driving the thin cylinder 31 to rotate around the axis of the cylinder 22. Since the thin cylinder 31 is fixed to the right end of the rotating cylinder 3, when the thin cylinder 31 rotates, it drives the rotating cylinder 3 and the uniformly arranged stirring plates 32 fixed on the outside of the rotating cylinder 3 to rotate synchronously. Thus, during the entire process of moving the fire extinguishing device to the fire scene, the pre-mixed liquid in the tank 1 is continuously stirred, breaking the stratification of the liquid in advance. When the fire extinguishing device reaches the fire source, the operator opens the valve of the gas cylinder 14. At this time, the device will again push the moving block 33 to move through compressed air, thereby driving the rotating cylinder 3 and the stirring plates 32 to perform a second forced stirring, further improving the uniformity of the liquid and ensuring that the liquid in all areas of the tank 1 can be fully mixed. Therefore, by adding a mechanical transmission stirring system linked by wheels 13, a dual stirring mechanism is formed with the original gas-driven stirring system, which further solves the technical problem of insufficient stirring in a single operation when the premixed liquid is severely separated, and greatly improves the reliability and adaptability of the device. For premixed liquids that have been left to stand for several months and have a very serious separation phenomenon, the stirring system linked by wheels 13 can use the entire movement time to carry out continuous pre-stirring during the movement to the fire site, and preliminarily mix the upper foam stock solution, the middle transition layer and the lower water layer in advance, which greatly reduces the difficulty of subsequent gas stirring and shortens the overall stirring time.

[0028] As one embodiment of the present invention; a winding rod 4 is rotatably located inside the cylinder 22 on the right side of the connector 23; A steel wire rope 41 is wound on the winding rod 4, and the steel wire rope 41 passes through the cylinder 22 and the air groove 222 and is fixed to the side of the moving block 33; a crank is fixed to one end of the winding rod 4 located on the outside of the cylinder 22; the winding rod 4 is rotatably connected to the cylinder 22 in a sealed manner. A second retaining ring 42 is fixed on the right side of the moving block 33; a gap is left between the spiral groove 36 and the moving block; a ramp 43 is opened at the end of the spiral groove 36 near the moving block.

[0029] During implementation, as the moving block 33 is pushed to the left by compressed air, the steel wire rope 41 fixed on its side will move to the left in sync. The steel wire rope 41 wound on the winding rod 4 will be gradually released, and the winding rod 4 will then rotate freely inside the cylinder 22. When the moving block 33 moves to the left limit position and stops, the internal motion state remains stable throughout the entire fire extinguishing operation. Specifically, after the fire is extinguished, or after the mixture in tank 1 has been used up, the operator first closes the valve of gas cylinder 14; then, the operator turns the handle located on the outside of cylinder 22, which drives the winding rod 4 fixedly connected to it to rotate synchronously. The rotating winding rod 4 will gradually wind the previously released steel wire rope 41, and the tension of the steel wire rope 41 will pull the moving block 33 to gradually move to the right along the rectangular rod 21, returning to the initial state; during the movement of the moving block 33 to the right, the insert rod 35 inserted into the spiral groove 36 will drive the rotating cylinder 3 to rotate in the opposite direction; when the insert rod 35 on the moving block 33 moves to the spiral groove When the right end of the spiral groove 36 is reached, since the spiral groove 36 is provided with a ramp 43 near the end of the moving block 33, the insert rod 35 located in the spiral groove 36 will gradually move out of the spiral groove 36 along the ramp 43 and be gradually squeezed into the sliding hole, while compressing the spring in the sliding hole. When the insert rod 35 is completely disengaged from the spiral groove 36, the insert rod 35 is completely inserted into the sliding hole and no longer has a transmission relationship with the rotating drum 3. The moving block 33 continues to move to the right until it is in contact with the second retaining ring 42 fixed on the right side. At this time, the moving block 33 accurately returns to the initial position, the entire reset process is completed, and the device can wait for the next use.

[0030] As one embodiment of the present invention; the outer ring of the rotating drum 3 is fixed with two opposing auger blades 37, and the auger blades 37 are arranged in a mirror image; In this embodiment, the air intake assembly includes an air chamber 5, and the air chamber 5 is connected to the air cylinder 14 via an air pipe; The gas chamber 5 is provided with evenly arranged air holes 51 on the tank body 1 above it, and a one-way valve is installed in the air hole 51.

[0031] During implementation, as the rotating drum 3 rotates, in addition to driving the originally uniformly arranged stirring blades 32 to perform circumferential shearing and stirring, it also drives the two opposing auger blades 37 fixed on the outer ring of the rotating drum 3 to rotate synchronously. The two auger blades 37 are set in a mirror image with completely opposite spiral directions. Therefore, during the rotation of the rotating drum 3, the auger blade 37 on the left will push the mixture in the left area of ​​the tank 1 to move continuously towards the middle position, and the auger blade 37 on the right will synchronously push the mixture in the right area of ​​the tank 1 to move towards the same middle position. The two opposing high-speed flowing mixtures meet and collide violently at the center of the two auger blades 37, generating extremely strong turbulence and shear force, which completely tears and disperses the liquid clumps of different concentrations, allowing the foam concentrate molecules and water molecules to achieve deep fusion. Specifically, when the valve of gas cylinder 14 is opened, compressed air enters the air chamber 5 of the air intake assembly through the air pipe. As an independent pressure-stabilizing chamber, the air chamber 5 can buffer airflow fluctuations and keep the pressure of the incoming compressed air uniform and stable. As the gas pressure in the air chamber 5 gradually increases, the gas enters the interior of the tank 1 through multiple air holes 51 evenly arranged at the bottom of the tank 1. Each air hole 51 is equipped with a one-way valve, which can effectively prevent the mixture in the tank 1 from flowing back into the air chamber 5 and the air pipe under pressure. Compressed air is injected into the mixture from multiple positions at the bottom of the tank 1 at the same time, forming a large number of bubbles that slowly rise to the surface of the liquid. During the entire process of the bubbles rising, they will continuously burst, further agitating the surrounding mixture and producing a continuous aeration and mixing effect.

[0032] In another embodiment of the present invention, an outer ring 6 is provided on the outer surface of the fixed cylinder 2 and the rotating cylinder 3 on the opposite side of the fixed cylinder 2 and the rotating cylinder 3. The outer ring 6 is fixed on the rotating cylinder 3; the inner ring of the outer ring 6 is provided with a sealing ring, which seals the contact area between the fixed cylinder 2 and the rotating cylinder 3; In this embodiment, a first rotating ring 61 is provided on the left side of the outer ring 6, and the first rotating ring 61 is fixed to the outer ring of the fixed cylinder 2; The outer ring of the first rotating ring 61 is provided with a first annular groove 62; a second liquid groove 63 is provided on the side of the first annular groove 62 facing the two first liquid grooves 25; The first annular groove 62 contains two rotatable ring pieces 64, which are connected by a fixing plate 641. The outer ring surface of the two ring pieces 64 is provided with a second rotating ring 65, and the inner ring of the second rotating ring 65 is provided with a second annular groove 66, and the ring pieces 64 are rotatable in the second annular groove 66. The upper outlet pipe 24 is fixed to the top of the second rotating ring 65 and communicates with the second ring groove 66; the lower outlet pipe 24 is fixed to the bottom of the second rotating ring 65 and communicates with the second ring groove 66. The second rotating ring 65 is fixed with a connecting plate 67 on its side, and the connecting plate 67 is fixed to the tank body 1; the outer ring 6 is fixed with an L-shaped plate on its outer ring, and the other side of the L-shaped plate is fixed to the ring piece 64 on the right side. In this embodiment, evenly arranged paddles 68 are fixed on the ring plate 64 located on the left side; A column 7 is fixed inside the first annular groove 62, and a fixing piece 71 is fixed on the column 7.

[0033] In practice, first connect connector 23 and the air intake assembly to two independent gas cylinders 14 respectively, forming a dual-cylinder 14 independent air supply system. When using the fire extinguishing device, first open the gas cylinder 14 connected to connector 23, and temporarily do not open the gas cylinder 14 connected to the air intake assembly. After compressed air enters connector 23, it pushes the moving block 33 to the left, thereby driving the rotating drum 3 to rotate. The rotating drum 3 will drive the outer ring 6 fixedly connected to it to rotate synchronously. Since the outer ring 6 is fixedly connected to the right ring plate 64 through an L-shaped plate, the rotation of the outer ring 6 will drive the right ring plate 64 to rotate synchronously. The two ring plates 64 are connected by a fixed... Plates 641 are connected as a whole, so the right ring plate 64 will drive the left ring plate 64 to rotate together. The two ring plates 64 rotate in a sealed manner in the first annular groove 62 of the first rotating ring 61 and the second annular groove 66 of the second rotating ring 65, respectively. At the same time, the left ring plate 64 will drive the uniformly arranged paddles 68 fixed on its surface to rotate synchronously. The rotating paddles 68 will perform additional stirring and mixing on the left side of the ring plate 64, eliminating the stirring dead corners around the fixed cylinder 2. When the moving block 33 moves to the left limit position, it will no longer drive the rotating cylinder 3 to rotate, and the ring plate 64 and the paddles 68 will also stop rotating. Specifically, when the moving block 33 moves to its limit position and the stirring process is completed, the gas cylinder 14 connected to the air intake assembly is opened, and compressed air enters the tank 1 through the air intake assembly, applying pressure to the mixture in the tank 1. Under pressure, the mixture is forced into the lower outlet pipe 24, and then enters the annular cavity space between the two ring plates 64. The mixture entering the annular cavity flows in two directions; one direction flows circumferentially along the annular cavity between the two ring plates 64 until it reaches the upper outlet pipe 24, directly entering the upper outlet pipe 24 and flowing into the gas-liquid mixing chamber 11; the other direction flows through the first rotating ring 61 through the first opening on the first rotating ring 61. The second liquid tank 63 enters the cylindrical groove 34 of the transfer block 33 and the through hole 221 of the rectangular rod 21. After passing through the upper half of the cylindrical groove 34, it flows back to the annular cavity space of the upper half of the ring plate 64 through the second liquid tank 63 above. Finally, it also flows into the gas-liquid mixing chamber 11 through the liquid outlet pipe 24 above. Since the first annular groove 62 has a column 7 fixed in it and a fixing plate 71 fixed on the column 7, when the mixed liquid flows along the annular cavity, it will be obstructed by the fixing plate 71 and generate strong turbulence, so that liquids of different concentrations are fully mixed again. After the second mixing, the mixed liquid finally enters the gas-liquid mixing chamber 11 and mixes with compressed air to foam.

[0034] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description only, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be construed as indicating or implying relative importance.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated compressed air foam fire extinguishing device, comprising a tank (1); a gas-liquid mixing chamber (11) is installed on the top of the tank (1); characterized in that, A fixing cylinder (2) is fixed to the left side of the inner cavity of the tank (1); a rectangular rod (21) is provided inside the fixing cylinder (2); A rotating cylinder (3) is provided on the right side of the fixed cylinder (2); a thin cylinder (31) is fixed at the right end of the rotating cylinder (3); A cylinder (22) is fixed to the right side of the rectangular rod (21), and the cylinder (22) extends out from the thin cylinder (31); the right side of the cylinder (22) is closed; a connector (23) is fixed to the side of the cylinder (22) that extends out from the thin cylinder (31); an air intake assembly is installed at the bottom of the tank (1); and uniformly arranged stirring blades (32) are fixed to the outside of the rotating cylinder (3); The top and bottom of the fixed cylinder (2) are both fixed with liquid outlet pipes (24), and the upper liquid outlet pipe (24) extends into the gas-liquid mixing chamber (11); the fixed cylinder (2) has first liquid grooves (25) on both sides facing the liquid outlet pipe (24); the rectangular rod (21) has through holes (221); The fixed cylinder (2) is provided with a sealing block (26), and the sealing block (26) slides on the rectangular rod (21); a spring is connected to the left side of the sealing block (26); a first retaining ring (27) is fixed to the left side of the sealing block (26) in the fixed cylinder (2); The rotating cylinder (3) is provided with a moving block (33), and the moving block (33) slides on the rectangular rod (21); the right side of the moving block (33) is provided with an air groove (222) inside the rectangular rod (21), and the air groove (222) passes through the upper and lower sides of the rectangle and communicates with the cylinder (22); The moving block (33) is provided with a cylindrical groove (34); the right side of the cylindrical groove (34) is provided with uniformly arranged sliding holes, and each sliding hole is provided with a spring-loaded insert rod (35); The left side of the moving block has a spiral groove (36) on the inner ring of the rotating cylinder (3).

2. The integrated fire-fighting compressed air foam extinguishing device according to claim 1, characterized in that: The tank (1) contains a pre-mixed solution of water and foam stock solution; The tank (1) is mounted on a vehicle frame (12); wheels (13) are mounted on the bottom of the vehicle frame (12); an inlet valve is mounted on the top of the tank (1), and an outlet valve is mounted on the bottom of the tank (1); The tank (1) has two gas cylinders (14) installed on top, and the gas cylinders (14) store compressed air; the connector (23) is connected to the gas cylinders (14) through a gas pipe; the air inlet assembly is connected to the gas cylinders (14) through a gas pipe. A connector is installed on the left side of the gas-liquid mixing chamber (11), which is used to connect the water hose and the spray gun; One of the gas cylinders (14) is connected to the gas-liquid mixing chamber (11) via a gas tube.

3. The integrated fire-fighting compressed air foam extinguishing device according to claim 2, characterized in that: The thin tube (31) extends to one side of the outlet tank (1) and is fixed with a pulley (15); A rotating shaft is fixed between the two wheels (13) below the cylinder (22); a worm gear (16) is fixed in the middle of the rotating shaft; a turbine gear (17) is engaged above the worm gear (16); The turbine (17) is provided with mounting plates on both sides, and the turbine (17) rotates on the mounting plates on both sides via a rotating rod; pulleys (15) are also installed on the rotating rod, and a belt (18) is connected between the two pulleys (15).

4. The integrated fire-fighting compressed air foam extinguishing device according to claim 2, characterized in that: The right side of the connector (23) is located inside the cylinder (22) and has a winding rod (4) that rotates. A steel wire rope (41) is wound on the winding rod (4), and the steel wire rope (41) passes through the cylinder (22) and the air groove (222) and is fixed to the side of the moving block (33); a crank is fixed to one end of the winding rod (4) located outside the cylinder (22); the winding rod (4) and the cylinder (22) are sealed and rotatably connected. A second retaining ring (42) is fixed on the right side of the moving block (33); there is a gap between the spiral groove (36) and the moving block; a ramp (43) is provided at the end of the spiral groove (36) near the moving block.

5. The integrated fire-fighting compressed air foam extinguishing device according to claim 2, characterized in that: The outer ring of the rotating drum (3) is fixed with two opposing auger plates (37), and the auger plates (37) are mirror images of each other.

6. The integrated fire-fighting compressed air foam extinguishing device according to claim 5, characterized in that: The air intake assembly includes an air chamber (5), and the air chamber (5) is connected to the air cylinder (14) via an air pipe; The gas chamber (5) is provided with uniformly arranged air holes (51) on the tank body (1) above it, and a one-way valve is installed in the air hole (51).

7. The integrated fire-fighting compressed air foam extinguishing device according to claim 2, characterized in that: The fixed cylinder (2) and the rotating cylinder (3) are provided with an outer ring (6) on the outer surface of the fixed cylinder (2) and the rotating cylinder (3); The outer ring (6) is fixed on the rotating cylinder (3); the inner ring of the outer ring (6) is provided with a sealing ring, which seals the contact between the fixed cylinder (2) and the rotating cylinder (3).

8. The integrated fire-fighting compressed air foam extinguishing device according to claim 7, characterized in that: The outer ring (6) has a first rotating ring (61) on its left side, and the first rotating ring (61) is fixed to the outer ring of the fixed cylinder (2); The outer ring of the first rotating ring (61) is provided with a first annular groove (62); the first annular groove (62) is provided with a second liquid groove (63) on the side facing the two first liquid grooves (25); The first annular groove (62) contains two rotatable ring pieces (64), which are connected by a fixing plate (641); the outer ring surface of the two ring pieces (64) is provided with a second rotating ring (65), and the inner ring of the second rotating ring (65) is provided with a second annular groove (66), and the ring pieces (64) rotate in the second annular groove (66). The upper outlet pipe (24) is fixed to the top of the second rotating ring (65) and communicates with the second ring groove (66); the lower outlet pipe (24) is fixed to the bottom of the second rotating ring (65) and communicates with the second ring groove (66). The second rotating ring (65) has a connecting plate (67) fixed on its side, and the connecting plate (67) is fixed on the tank body (1); the outer ring (6) has an L-shaped plate fixed on its outer ring, and the other side of the L-shaped plate is fixed on the ring piece (64) on the right side.

9. The integrated fire-fighting compressed air foam extinguishing device according to claim 8, characterized in that: Evenly arranged paddles (68) are fixed on the ring plate (64) located on the left side; A column (7) is fixed inside the first annular groove (62), and a fixing piece (71) is fixed on the column (7).

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