A portable foam fire extinguishing device

Abstract

The utility model belongs to fire fighting equipment technical field, specifically is a kind of portable foam fire extinguishing device, including box, the left and right sides of box are fixedly connected with multiple wheel connecting shaft, multiple wheel connecting shaft outside is rotatably connected with wheel, the upper end central fixed connection of box has detachable disc;Box right side lower end is fixedly connected with fire extinguishing agent booster pipe, and fire extinguishing agent booster pipe can be divided into two parts by connection, the lower end fixed connection of fire extinguishing agent booster pipe has air cylinder barrel;Fire gun pipe inside rotationally connects fire extinguishing switch shaft, the central lower end of fire extinguishing switch shaft has slotted switch shaft fire extinguishing agent outlet, and fire extinguishing switch shaft inside front half part is slotted, and rear half part is fixedly connected with fire extinguishing switch outlet slot;Air cylinder barrel and air cylinder booster shaft linkage, manually press air cylinder handle to increase fire extinguishing agent injection pressure and range, and manual pressure does not need external power, adapts to power-free environment.

Description

Technical Field

[0001] This utility model belongs to the field of fire protection equipment technology, specifically a portable foam fire extinguishing device. Background Technology

[0002] Existing foam fire extinguishing devices are mostly fixed or large trolley designs, which are bulky and heavy, making them difficult to deploy quickly in confined spaces or emergency situations.

[0003] Most portable fire extinguishers are lightweight, but they cannot adjust the spray mode according to the fire situation. Traditional devices also lack a quick start mechanism and a safety locking structure, making them complicated to operate and prone to accidental activation or insufficient spray pressure.

[0004] Therefore, there is an urgent need for a lightweight, adjustable spray pattern, and easy-to-operate foam fire extinguishing device to meet the needs of diverse fire scenarios. Thus, a portable foam fire extinguishing device is proposed to address the above issues. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, this utility model proposes a portable foam fire extinguishing device.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A portable foam fire extinguishing device of this utility model includes a housing. Multiple wheel connecting shafts are fixedly connected to the left and right sides of the housing. Wheels are rotatably connected to the outer sides of the multiple wheel connecting shafts. A detachable disc is fixedly connected to the center of the upper end of the housing. A first connecting cylindrical tube is fixedly connected to the upper end of the detachable disc. A second connecting cylindrical tube is fixedly connected to the upper end of the first connecting cylindrical tube. A third connecting cylindrical tube is fixedly connected to the upper end of the second connecting cylindrical tube. Multiple gun barrel rotating crankshafts are fixedly connected to the left and right ends of the second connecting cylindrical tube. The upper end of the third connecting cylindrical tube... A fire extinguishing gun barrel is fixedly connected. A telescope connecting shaft is fixedly connected to the upper front end of the fire extinguishing gun barrel. A telescope tube is fixedly connected to the upper end of the telescope connecting shaft. A telescope head is fixedly connected to the upper end of the telescope tube. A fire extinguishing agent pressurization pipe is fixedly connected to the lower right side of the housing. The fire extinguishing agent pressurization pipe can be divided into two parts and connected by a pipe thread. A pressurization pipe connecting plate is fixedly connected to the lower end of the fire extinguishing agent pressurization pipe. An air cylinder body is fixedly connected to the right end of the pressurization pipe connecting plate. An air cylinder sealing cap is nested at the upper end of the air cylinder body. An air cylinder pressurization shaft is slidably connected to the upper end of the air cylinder sealing cap. An air cylinder handle is fixedly connected to the upper end of the air cylinder pressurization shaft.

[0007] Preferably, the number of wheel connecting shafts and wheels is four, and the wheel connecting shafts and wheels are located at the front end of the extinguishing agent pressurization pipe.

[0008] Preferably, the upper ends of the housing and the detachable disc are rotatably connected by a plurality of detachable disc bolts, which fix the housing and the detachable disc together, and a cross groove is cut on the top of the detachable disc bolt.

[0009] Preferably, there are two barrel rotation crankshafts, located on the left and right sides above the second connecting cylindrical tube. The barrel rotation crankshafts are parallel and symmetrical to each other along the left and right sides of the second connecting cylindrical tube, the third connecting cylindrical tube, the fire extinguishing gun barrel, and the fire extinguishing gun barrel rotation axis. The shape of the barrel rotation crankshaft is a crankshaft with one side larger than the other.

[0010] Preferably, the first connecting cylindrical tube, the second connecting cylindrical tube, and the third connecting cylindrical tube are hollow inside, the bottom end of the second connecting cylindrical tube completely closes the upper hollow part of the first connecting cylindrical tube, and the bottom end of the third connecting cylindrical tube completely closes the upper hollow part of the second connecting cylindrical tube.

[0011] Preferably, the fire extinguishing gun barrel is internally connected to a fire extinguishing switch shaft, the lower center of the fire extinguishing switch shaft has a slotted switch shaft fire extinguishing agent outlet, the front half of the fire extinguishing switch shaft is slotted, and the rear half is fixedly connected, the front end of the fire extinguishing switch shaft has a slotted external thread of the fire extinguishing gun barrel rotating shaft, the lower center of the fire extinguishing switch shaft has a slotted switch shaft fire extinguishing agent outlet, the rear end of the fire extinguishing switch shaft is fixedly connected to a fire extinguishing switch, and the fire extinguishing switch is shaped like a four-leaf petal.

[0012] Preferably, the third connecting cylindrical tube is funnel-shaped with a smaller upper end and a larger lower end. The lower end of the fire extinguishing gun tube has a gun extinguishing agent outlet in the middle. The gun extinguishing agent outlet completely encloses and surrounds the upper end of the third connecting cylindrical tube. The front end of the fire extinguishing gun tube has a groove with an internal thread. The fire extinguishing switch shaft is rotatably connected to the fire extinguishing gun tube through the internal thread and the external thread of the fire extinguishing gun tube rotating shaft.

[0013] Preferably, the fire extinguishing gun barrel and the fire extinguishing switch shaft are internally fixedly connected by a fire extinguishing gun barrel rotating shaft, and the fire extinguishing gun barrel rotating shaft is located at the rear end of the fire extinguishing agent outlet of the gun barrel and the fire extinguishing agent outlet of the switch shaft, and the gun barrel rotating crankshaft is fixedly connected through the fire extinguishing gun barrel rotating shaft.

[0014] Preferably, the cylinder body and the cylinder sealing cover are hollow inside and have an open space between them. The cylinder sealing cover closes and surrounds the upper end of the cylinder body, and the lower end of the cylinder booster shaft is located at the bottom end of the cylinder body and does not penetrate the bottom of the cylinder body.

[0015] The beneficial effects of this utility model are: 1. This utility model provides a portable foam fire extinguishing device, in which the cylinder body is linked to the cylinder pressurization shaft. Manually pressing the cylinder handle increases the spray pressure of the extinguishing agent and extends the range, covering the blind spots of traditional fire extinguishers. Moreover, manual pressurization does not require external power, making it suitable for environments without power.

[0016] 2. This utility model provides a portable foam fire extinguishing device, which has 4 sets of wheels at the bottom of the box, and the fire extinguishing gun barrel can be rotated 360° to adjust the angle through the crankshaft of the gun barrel and the rotating shaft of the fire extinguishing gun barrel.

[0017] 3. This utility model provides a portable foam fire extinguishing device, which uses a detachable disc to be fixed to the box body by bolts with cross grooves, making it easy to quickly disassemble, maintain and replace with a larger fire extinguishing device.

[0018] 4. This utility model provides a portable foam fire extinguishing device, which achieves stepless flow control through a petal-shaped four-blade switch via a thread, and can control the amount of fire extinguishing agent according to the fire situation. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a perspective view of the present invention; Figure 2 This is an enlarged view of the booster system in this utility model; Figure 3 This is a partial structural diagram of the box body in this utility model; Figure 4 This is a perspective view of the fire extinguishing switch shaft in this utility model; Figure 5 This is a perspective view of the fire extinguisher barrel in this utility model; Figure 6 This is a schematic diagram of the structure of the fire extinguishing switch shaft in this utility model.

[0020] Legend: 1. Housing; 2. Wheel connecting shaft; 3. Wheel; 4. Removable disc; 5. Removable disc bolt; 6. Cross groove; 7. First connecting cylindrical tube; 8. Second connecting cylindrical tube; 9. Third connecting cylindrical tube; 10. Fire extinguisher barrel; 11. Fire extinguisher barrel rotating shaft; 12. Fire extinguishing switch shaft; 13. Fire extinguishing switch; 14. Telescope connecting shaft; 15. Telescope barrel; 16. Telescope head; 17. Barrel rotating crankshaft; 18. Fire extinguishing agent outlet of the barrel; 19. Internal thread of the fire extinguisher barrel; 20. Fire extinguishing agent outlet of the switch shaft; 21. External thread of the fire extinguisher barrel rotating shaft; 22. Fire extinguishing agent pressurizing pipe; 23. Pressurizing pipe connecting plate; 24. Air cylinder body; 25. Air cylinder sealing cap; 26. Air cylinder pressurizing shaft; 27. Air cylinder handle; 28. Connecting thread; 29. ​​Fire extinguishing switch outlet groove; 30. Fire extinguishing switch blocking shaft. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] Specific implementation examples are given below.

[0023] Please see Figures 1-6This utility model provides a portable foam fire extinguishing device, including a housing 1. Multiple wheel connecting shafts 2 are fixedly connected to the left and right sides of the housing 1. Wheels 3 are rotatably connected to the outer sides of the multiple wheel connecting shafts 2. A detachable disc 4 is fixedly connected to the center of the upper end of the housing 1. A first connecting cylindrical tube 7 is fixedly connected to the upper end of the detachable disc 4. A second connecting cylindrical tube 8 is fixedly connected to the upper end of the first connecting cylindrical tube 7. A third connecting cylindrical tube 9 is fixedly connected to the upper end of the second connecting cylindrical tube 8. Multiple barrel rotation crankshafts 17 are fixedly connected to the left and right ends of the second connecting cylindrical tube 8. A fire extinguishing gun barrel 10 is fixedly connected to the upper end of the third connecting cylindrical tube 9. A telescope connecting shaft 14 is fixedly connected to the upper front end of the fire extinguishing gun barrel 10. A telescope tube 15 is fixedly connected to the upper end of the telescope connecting shaft 14. The device is equipped with a telescope head 16. A fire extinguishing agent pressurization pipe 22 is fixedly connected to the lower right side of the housing 1. The fire extinguishing agent pressurization pipe 22 can be divided into two parts connected by a connecting thread 28. A pressurization pipe connecting plate 23 is fixedly connected to the lower end of the fire extinguishing agent pressurization pipe 22. An air cylinder body 24 is fixedly connected to the right end of the pressurization pipe connecting plate 23. An air cylinder sealing cap 25 is nested at the upper end of the air cylinder body 24. An air cylinder pressurization shaft 26 is slidably connected to the upper end of the air cylinder sealing cap 25. An air cylinder handle 27 is fixedly connected to the upper end of the air cylinder pressurization shaft 26. During operation, the device rotates via the fire extinguishing gun barrel rotation shaft 11 to adjust to the optimal spray angle (e.g., an elevation angle of 30°). The telescope barrel 15 is fixed to the fire extinguishing gun barrel via the telescope connecting shaft 14, supporting 5-10x zoom. Firefighters use the telescope head 16 to lock onto the base of the fire source, ensuring precise coverage of the fire extinguishing agent.

[0024] Furthermore, such as Figure 1 As shown, there are four wheel connecting shafts 2 and 3, located at the front end of the extinguishing agent pressurization pipe 22. During operation, firefighters can drag the container 1 with one hand, using the wheels to achieve 360° rotation and easily move it to a location 5-8 meters from the fire source.

[0025] Furthermore, such as Figure 1 As shown, multiple detachable disc bolts 5 are rotatably connected to the upper ends of the housing 1 and the detachable disc 4. The detachable disc bolts 5 fix the housing 1 and the detachable disc 4 together. A cross-shaped groove 6 is cut on the top of the detachable disc bolt 5. During operation, the detachable disc bolt 5 with the cross-shaped groove 6 is tightened with a screwdriver to fix the detachable disc 4 to the housing 1, which facilitates quick separation and maintenance, and allows for replacement of the fire extinguishing equipment.

[0026] Furthermore, such as Figure 1 and Figure 3As shown, there are two barrel rotation crankshafts 17, located on the left and right sides above the second connecting cylindrical tube 8. These crankshafts 17 are parallel and symmetrical to each other along the left and right sides of the second connecting cylindrical tube 8, the third connecting cylindrical tube 9, the fire extinguishing gun barrel 10, and the fire extinguishing gun barrel rotation axis 11. The shape of each crankshaft 17 is that one side is larger than the other. During operation, the fire extinguishing gun barrel 10 can rotate on the fire extinguishing gun barrel rotation axis 11 to adjust the spray direction of the fire extinguishing gun barrel 10.

[0027] Furthermore, such as Figure 1 and Figure 3 As shown, the first connecting cylindrical tube 7, the second connecting cylindrical tube 8, and the third connecting cylindrical tube 9 are hollow inside. The bottom end of the second connecting cylindrical tube 8 completely seals the upper hollow portion of the first connecting cylindrical tube 7, and the bottom end of the third connecting cylindrical tube 9 completely seals the upper hollow portion of the second connecting cylindrical tube 8. During operation, the first connecting cylindrical tube 7, the second connecting cylindrical tube 8, and the third connecting cylindrical tube 9 adopt a funnel-shaped gradually changing diameter design, with their hollow interiors forming extinguishing agent channels, accelerating the jet flow step by step.

[0028] Furthermore, such as Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, the fire extinguishing gun barrel 10 is internally connected to a fire extinguishing switch shaft 12. The lower center of the fire extinguishing switch shaft 12 has a slotted fire extinguishing agent outlet 20. The front half of the fire extinguishing switch shaft 12 has a slotted fire extinguishing switch blocking shaft 30, while the rear half is fixedly connected to a fire extinguishing switch outlet slot 29. The front end of the fire extinguishing switch shaft 12 has a slotted external thread 21 for the fire extinguishing gun barrel rotation shaft. The lower center of the fire extinguishing switch shaft 12 has a slotted fire extinguishing agent outlet 20. The rear end of the fire extinguishing switch shaft 12 is fixedly connected to a fire extinguishing switch 13, which is shaped like a four-petaled flower. During operation, rotating the fire extinguishing switch 13 rotates the fire extinguishing switch shaft 12. The external thread 21 of the fire extinguishing gun barrel rotation shaft engages with the internal thread 19 of the fire extinguishing gun barrel, allowing stepless adjustment of the fire extinguishing agent outlet 20 to achieve 0-100% flow control.

[0029] Furthermore, such as Figure 1 , Figure 4 , Figure 5 and Figure 6As shown, the third connecting cylindrical tube 9 is funnel-shaped, with a smaller top and a larger bottom. The lower end of the fire extinguishing gun tube 10 has a fire extinguishing agent outlet 18, which completely encloses the upper end of the third connecting cylindrical tube 9. The front end of the fire extinguishing gun tube 10 has an internal thread 19. The fire extinguishing switch shaft 12 is rotatably connected to the fire extinguishing gun tube 10 via the internal thread 19 and the external thread 21 of the fire extinguishing gun tube rotating shaft. During operation, the first connecting cylindrical tube 7, the second connecting cylindrical tube 8, and the third connecting cylindrical tube 9 adopt a funnel-shaped gradually changing diameter design. The external thread 21 of the fire extinguishing gun tube rotating shaft mates with the internal thread 19 of the fire extinguishing gun tube, progressively accelerating the jet stream.

[0030] Furthermore, such as Figure 1 , Figure 4 , Figure 5 and Figure 6 As shown, a fire extinguishing gun barrel 10 and a fire extinguishing switch shaft 12 are internally connected to a fire extinguishing gun barrel rotating shaft 11. The fire extinguishing gun barrel rotating shaft 11 is located at the rear end of the fire extinguishing agent outlet 18 of the gun barrel and the fire extinguishing agent outlet 20 of the switch shaft. The gun barrel rotating crankshaft 17 is fixedly connected through the fire extinguishing gun barrel rotating shaft 11. During operation, the fire extinguishing gun barrel 10 rotates on the fire extinguishing gun barrel rotating shaft 11 to adjust the fire extinguishing spray height. The fire extinguishing gun barrel rotating shaft 11 is located at the rear end of the fire extinguishing agent outlet 18 of the gun barrel and the fire extinguishing agent outlet 20 of the switch shaft, so it will not interfere with the fire extinguishing agent spray.

[0031] Furthermore, such as Figure 1 and Figure 2 As shown, the cylinder body 24 and the cylinder cap 25 are hollow inside and have an open space between them. The cylinder cap 25 closes and surrounds the upper end of the cylinder body 24, and the lower end of the cylinder booster shaft 26 is located at the bottom end of the cylinder body 24, but does not penetrate the bottom of the cylinder body 24. During operation, pressing the cylinder handle 27 repeatedly causes compressed air to enter the housing 1 through the booster pipe 22, pressurizing the extinguishing agent.

[0032] Working principle: In the event of a fire, firefighters can drag the container 1 with one hand, using the wheels to achieve 360° rotation, easily moving it to a location 5-8 meters from the fire source. Rotating the fire extinguishing switch 13 rotates the fire extinguishing switch shaft 12. The external thread 21 of the fire extinguishing gun barrel rotating shaft engages with the internal thread 19 of the fire extinguishing gun barrel, allowing stepless adjustment of the extinguishing agent outlet 20 on the switch shaft, achieving 0-100% flow control. The fire extinguishing gun barrel 10 rotates via the fire extinguishing gun barrel rotating shaft 11, adjusting it to the optimal spray angle of the extinguishing agent (e.g., an elevation angle of 30°). The fire extinguishing gun barrel rotating shaft 11 is located between the extinguishing agent outlet 18 of the barrel and the switch. The rear end of the extinguishing agent outlet 20 will not interfere with the extinguishing agent spray. The detachable disc 4 fixes the first connecting cylindrical tube 7, the second connecting cylindrical tube 8, and the third connecting cylindrical tube 9 with a funnel-shaped gradually changing diameter design. The hollow interior forms an extinguishing agent channel, which accelerates the spray flow step by step. The telescope tube 15 is fixed to the fire extinguishing gun tube 10 through the telescope connecting shaft 14 and supports multiple zoom. Firefighters lock the base of the fire source through the telescope head 16 to ensure accurate coverage of the extinguishing agent. When the extinguishing distance is insufficient or the fire is too large, the air cylinder handle 27 is pressed repeatedly, and compressed air enters the housing 1 through the pressurization pipe 22 to pressurize the extinguishing agent.

[0033] When it is necessary to replace other fire extinguishing boxes, the detachable disc bolt 5 of the cross-shaped groove 6 can be loosened with a screwdriver to disassemble the detachable disc 4 from the box body 1, which facilitates quick separation and maintenance, and allows for the replacement of fire extinguishing equipment.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A portable foam fire extinguishing device, comprising a housing (1), characterized in that: Multiple wheel connecting shafts (2) are fixedly connected to the left and right sides of the housing (1). Wheels (3) are rotatably connected to the outer side of the multiple wheel connecting shafts (2). A detachable disc (4) is fixedly connected to the center of the upper end of the housing (1). A first connecting cylindrical tube (7) is fixedly connected to the upper end of the detachable disc (4). A second connecting cylindrical tube (8) is fixedly connected to the upper end of the first connecting cylindrical tube (7). A third connecting cylindrical tube (9) is fixedly connected to the upper end of the second connecting cylindrical tube (8). Multiple gun barrel rotating crankshafts (17) are fixedly connected to the left and right ends of the second connecting cylindrical tube (8). A fire extinguishing gun barrel (10) is fixedly connected to the upper end of the third connecting cylindrical tube (9). A telescope connecting shaft (1) is fixedly connected to the upper front end of the fire extinguishing gun barrel (10). 4) The upper end of the telescope connecting shaft (14) is fixedly connected to the telescope tube (15), the upper end of the telescope tube (15) is fixedly connected to the telescope head (16), the lower right end of the box body (1) is fixedly connected to the extinguishing agent pressurization pipe (22), and the extinguishing agent pressurization pipe (22) can be divided into two parts and connected by connecting threads (28). The lower end of the extinguishing agent pressurization pipe (22) is fixedly connected to the pressurization pipe connecting plate (23), the right end of the pressurization pipe connecting plate (23) is fixedly connected to the air cylinder body (24), the upper end of the air cylinder body (24) is nested with the air cylinder sealing cap (25), the upper end of the air cylinder sealing cap (25) is slidably connected to the air cylinder pressurization shaft (26), and the upper end of the air cylinder pressurization shaft (26) is fixedly connected to the air cylinder handle (27).

2. The portable foam fire extinguishing device according to claim 1, characterized in that: The number of wheel connecting shafts (2) and wheels (3) is four, and the wheel connecting shafts (2) and wheels (3) are located at the front end of the extinguishing agent pressurization pipe (22).

3. A portable foam fire extinguishing device according to claim 1, characterized in that: The upper ends of the box (1) and the detachable disc (4) are rotatably connected by a plurality of detachable disc bolts (5). The detachable disc bolts (5) are fixedly connected to the box (1) and the detachable disc (4). A cross groove (6) is cut on the top of the detachable disc bolts (5).

4. A portable foam fire extinguishing device according to claim 1, characterized in that: There are two barrel rotation crankshafts (17), located on the left and right sides above the second connecting cylindrical tube (8). The barrel rotation crankshafts (17) are parallel and symmetrical to each other along the left and right sides of the second connecting cylindrical tube (8), the third connecting cylindrical tube (9), the fire extinguishing gun tube (10), and the fire extinguishing gun tube rotation axis (11). The shape of the barrel rotation crankshafts (17) is a crankshaft with one side larger than the other.

5. A portable foam fire extinguishing device according to claim 1, characterized in that: The first connecting cylindrical tube (7), the second connecting cylindrical tube (8) and the third connecting cylindrical tube (9) are hollow inside. The bottom end of the second connecting cylindrical tube (8) completely closes the upper hollow part of the first connecting cylindrical tube (7), and the bottom end of the third connecting cylindrical tube (9) completely closes the upper hollow part of the second connecting cylindrical tube (8).

6. A portable foam fire extinguishing device according to claim 1, characterized in that: The fire extinguishing gun barrel (10) is internally connected to a fire extinguishing switch shaft (12). The fire extinguishing switch shaft (12) has a slotted switch shaft fire extinguishing agent outlet (20) at the lower center. The fire extinguishing switch shaft (12) has a slotted fire extinguishing switch blocking shaft (30) in the front half and a fixed fire extinguishing switch outlet groove (29) in the rear half. The fire extinguishing switch shaft (12) has a slotted fire extinguishing gun barrel rotating shaft external thread (21) on the front side. The fire extinguishing switch shaft (12) has a slotted switch shaft fire extinguishing agent outlet (20) at the lower center. The fire extinguishing switch shaft (12) has a fixed fire extinguishing switch (13) at the rear end. The fire extinguishing switch (13) is shaped like a four-leaf petal.

7. A portable foam fire extinguishing device according to claim 1, characterized in that: The third connecting cylindrical tube (9) is funnel-shaped with a smaller upper end and a larger lower end. The lower end of the fire extinguishing gun tube (10) has a gun tube extinguishing agent outlet (18) in the middle. The gun tube extinguishing agent outlet (18) completely encloses and surrounds the upper end of the third connecting cylindrical tube (9). The front end of the fire extinguishing gun tube (10) has a slotted fire extinguishing gun tube internal thread (19). The fire extinguishing switch shaft (12) is rotatably connected to the fire extinguishing gun tube (10) through the fire extinguishing gun tube internal thread (19) and the fire extinguishing gun tube rotating shaft external thread (21).

8. A portable foam fire extinguishing device according to claim 6, characterized in that: The fire extinguishing gun barrel (10) and the fire extinguishing switch shaft (12) are internally fixedly connected to the fire extinguishing gun barrel rotating shaft (11), and the fire extinguishing gun barrel rotating shaft (11) is located at the rear end of the fire extinguishing agent outlet (18) of the gun barrel and the fire extinguishing agent outlet (20) of the switch shaft. The gun barrel rotating crankshaft (17) is fixedly connected through the fire extinguishing gun barrel rotating shaft (11).

9. A portable foam fire extinguishing device according to claim 1, characterized in that: The cylinder body (24) and the cylinder sealing cover (25) are hollow inside and have open spaces between them. The cylinder sealing cover (25) closes and surrounds the upper end of the cylinder body (24). The lower end of the cylinder booster shaft (26) is located at the bottom end of the cylinder body (24) and does not penetrate the bottom of the cylinder body (24).

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