Water-driven compressed air foam fire extinguishing device and method

Abstract

The invention discloses a water-driven compressed air foam fire extinguishing device and method. The water-driven compressed air foam fire extinguishing device comprises a driving assembly, and a first pump body and a second pump body are installed on the two sides of the driving assembly correspondingly; the driving assembly comprises a mounting cover and a water flowing cavity, a rotating shaft is arranged in the mounting cover, an impeller is arranged on the rotating shaft, and the impeller is located in the water flowing cavity; the driving end of the second pump body is provided with a driving shaft, and the driving end of the first pump body and the end, close to the driving assembly, of the driving shaft are each provided with a connecting assembly. According to the water-driven compressed air foam fire extinguishing device, when water with certain pressure and flow enters the driving assembly from the water inlet pipe, the impeller can rotate under the impact of water flow, then the first pump body and the second pump body are driven to do work at the same time, and due to the fact that a power device is omitted, the weight of the device is reduced, and the size is reduced; the device is convenient to carry and use, and the use convenience of the device is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of foam fire extinguishing, and in particular relates to a compressed air foam fire extinguishing device and method driven by water. Background Art

[0002] Compressed air fire extinguishing foam, also known as compressed air foam, is a homogeneous foam produced by fully mixing water, foam liquid and air under a certain pressure. Compressed air foam can quickly cover the fire source, isolate oxygen, and achieve the effect of rapid fire extinguishing. At the same time, the water in the foam can also effectively reduce the temperature of the fire scene and prevent the fire from spreading.

[0003] Most of the existing compressed air foam devices have their own power devices, which makes them bulky and difficult to carry manually, so most of them are integrated into fire trucks. There are often no well-paved roads in the wild or forests, and most of them are rugged mountain roads, narrow paths or even no roads at all. The foam fire-fighting fire truck has a large body and it is difficult to pass under such road conditions. It is easy to get stuck or fail to reach the fire scene at all, which easily delays the fire-fighting time. In view of this, we propose a water-driven compressed air foam fire-fighting device and method to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a water-driven compressed air foam fire extinguishing device and method in view of the problems existing in the prior art.

[0005] To achieve the above object, the invention adopts the following technical solution: a water-driven compressed air foam fire extinguishing device, comprising a driving assembly, wherein a first pump body and a second pump body are respectively installed on both sides of the driving assembly; The driving assembly comprises a mounting cover and a water flow chamber, a rotating shaft is arranged inside the mounting cover, an impeller is arranged on the rotating shaft, and the impeller is located inside the water flow chamber; The driving end of the second pump body is provided with a driving shaft, and the driving end of the first pump body and one end of the driving shaft close to the driving component are both provided with a connecting component, and the driving end of the second pump body and the driving shaft are connected to the rotating shaft through the connecting component, and the outer wall of the mounting cover is fixedly installed with a water inlet pipe and a drain pipe connected to the water flow chamber, and the outer wall of the water inlet pipe is connected with a diversion pipe, and the other end of the diversion pipe is connected with a mixing pipe, the output end of the second pump body is installed with a first connecting pipe, and the output end of the first pump body is installed with a second connecting pipe, and the first connecting pipe and the second connecting pipe are both connected with the mixing pipe, and a control component is also provided inside the driving component.

[0006] By adopting the above technical solution, when water with a certain pressure and flow enters the driving component from the water inlet pipe, the impeller will rotate under the impact of the water flow, thereby driving the first pump body and the second pump body to work at the same time. Water, foam and high-pressure gas will eventually enter the mixing tube and mix, thereby forming compressed air fire extinguishing foam that is sprayed out to extinguish the fire. Since the power device is eliminated, the device is reduced in weight and size, making it convenient to carry and use.

[0007] Furthermore, the first pump body is a foam pump, and a foam inlet tube is installed at the input end of the first pump body.

[0008] Furthermore, a connecting cover is fixedly mounted on a side of the mounting cover close to the first pump body, and the first pump body is fixedly mounted on an inner wall of the connecting cover by bolts.

[0009] The above technical solution is used to fix the foam pump.

[0010] Furthermore, the impeller is located between the water inlet pipe and the drain pipe.

[0011] By adopting the above technical solution, the water flow can drive the impeller to rotate.

[0012] Furthermore, an air cavity and a component cavity are provided inside the second pump body, the drive shaft is rotatably installed inside the component cavity, one end of the drive shaft away from the component cavity extends to the outside of the second pump body, a turntable is fixedly installed on the end of the drive shaft located inside the component cavity, a connecting rod is rotatably installed on the side of the turntable away from the drive shaft, a movable rod extending into the air cavity is rotatably installed on the other end of the connecting rod, a piston slidably connected to the inner wall of the air cavity is fixedly installed on the other end of the movable rod, an air intake pipe is installed on the side of the second pump body, the air intake pipe and the first connecting pipe are both connected to the component cavity, and one-way valves are provided on the surfaces of the air intake pipe and the first connecting pipe.

[0013] By adopting the above technical solution, when the rotating shaft rotates, the rotating disk can be driven to rotate through the driving shaft, and then the piston can be reciprocated through the connecting rod and the movable rod, thereby realizing the work of the second pump body.

[0014] Furthermore, a connecting groove is formed on one side of the installation cover close to the second pump body, and a positioning cover extending into the connecting groove is fixedly mounted on the side of the second pump body, and the positioning cover is fixed to the installation cover by bolts.

[0015] The above technical solution is used to fix the second pump body.

[0016] Furthermore, both ends of the rotating shaft extend to the outside of the mounting cover, a sealing member is provided inside the mounting cover, and the rotating shaft is rotatably connected to the inner wall of the sealing member.

[0017] By adopting the above technical solution, water is not easily lost to the outside of the installation cover through the gap between the rotating shaft and the installation cover, thereby improving the sealing performance of the structure.

[0018] Furthermore, the connecting assembly includes two square slots respectively opened at both ends of the rotating shaft, and the driving end of the first pump body and the end of the driving shaft close to the driving assembly are both fixedly mounted with blocks extending into the corresponding square slots.

[0019] By adopting the above technical solution, the driving end of the first pump body and the driving shaft of the second pump body are connected to the rotating shaft, and then the first pump body and the second pump body are driven by the rotating shaft to work simultaneously.

[0020] Furthermore, the control component includes a circuit board arranged inside the driving component, the circuit board is provided with a control module and a wireless communication module, the driving component is also installed with a controller, the surfaces of the second connecting pipe, the shunt pipe and the first connecting pipe are all installed with flow control valves, and the control module, wireless communication module, controller and flow control valve are all electrically connected to the circuit board.

[0021] By adopting the above technical solution, it is convenient for the staff to control the amount of compressed air, foam and water mixed, thereby ensuring the effect of compressed air foam fire extinguishing.

[0022] The present application also provides a method for a water-driven compressed air foam fire extinguishing device, comprising the following steps: The controller is used to open each flow control valve respectively, and each flow control valve is adjusted according to the proportional requirements, so as to control the amount of water, foam and compressed air entering the mixing pipe; Connect a water hose and a spray gun to the end of the mixing tube, connect the water inlet pipe to the external water pump, connect the drain pipe to the inside of the external water tank, and finally connect the foam inlet pipe of the first pump body to the inside of the external foam barrel; Start the external water pump, so that water enters the water flow chamber through the water inlet pipe to drive the impeller to rotate, thereby driving the first pump body and the second pump body to work at the same time; The mixed compressed air foam is sprayed through the mixing pipe to extinguish the fire.

[0023] Compared with the prior art, the present invention has the following beneficial effects: The water-driven compressed air foam fire extinguishing device and method, when water with a certain pressure and flow enters the driving component from the water inlet pipe, the impeller will rotate under the impact of the water flow, thereby driving the first pump body and the second pump body to work at the same time, and the water, foam and high-pressure gas will eventually enter the mixing tube and mix, so as to form compressed air fire extinguishing foam to be sprayed out for fire extinguishing. Since the power device is eliminated, the weight of the device is reduced, the size is reduced, and it is convenient to carry and use. It can be used in conjunction with an existing fire truck or a garden water tanker, and can also be used in conjunction with a hand-lift pump or a portable water pump for outdoor forest fire extinguishing when the fire truck is difficult to reach, which greatly improves the convenience of using the device.

[0024] The water-driven compressed air foam fire extinguishing device and method can control the amount of water, foam and compressed air entering the mixing tube through the arranged control component to achieve the precise proportion of compressed air foam, thereby ensuring the effect of compressed air foam fire extinguishing.

[0025] The water-driven compressed air foam fire extinguishing device and method facilitate the connection and fixation of the first pump body and the second pump body with the driving assembly by means of the provided connection cover, the connection groove and the positioning cover, thereby facilitating the later disassembly or maintenance of the first pump body and the second pump body. Meanwhile, by providing the connection assembly, the driving end of the first pump body and the driving shaft of the second pump body can be stably connected to the rotating shaft, thereby realizing multi-axis synchronous rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the main body of the present invention; Figure 2 It is a side sectional view of the present invention; Figure 3 This is a front view of the water flow chamber of the present invention; Figure 4 It is a schematic diagram of a square card slot, a card block and a connection cover of the present invention; Figure 5 It is a cross-sectional view of a second pump body of the present invention; Figure 6 It is a schematic diagram of the internal composition of the air cavity and the component cavity of the present invention.

[0027] In the figure: 1, drive assembly; 101, installation cover; 102, water flow chamber; 2, first pump body; 3, second pump body; 4, mixing tube; 5, bubble inlet tube; 6, second connecting tube; 7, water inlet pipe; 8, drain pipe; 9, diverter pipe; 10, first connecting tube; 11, air inlet pipe; 12, rotating shaft; 13, impeller; 14, sealing element; 15, square slot; 16, block; 17, connecting cover; 18, connecting slot; 19, positioning cover; 20, driving shaft; 21, turntable; 22, connecting rod; 23, movable rod; 24, piston; 25, air cavity; 26, component cavity; 27, controller; 28, flow control valve. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. 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 creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as "middle", "upper", "lower", "left", "right", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, the specific scheme of the embodiment is as follows: a water-driven compressed air foam fire extinguishing device includes a driving assembly 1, a first pump body 2 and a second pump body 3 are respectively installed on both sides of the driving assembly 1, the driving assembly 1 includes a mounting cover 101 and a water flow chamber 102, a rotating shaft 12 is arranged inside the mounting cover 101, an impeller 13 is arranged on the rotating shaft 12, and the impeller 13 is located inside the water flow chamber 102, a driving end of the second pump body 3 is provided with a driving shaft 20, and the driving end of the first pump body 2 and the driving shaft 20 are close to the driving assembly 1 One end of each pump body 10 is provided with a connecting assembly, the driving end of the second pump body 3 and the driving shaft 20 are connected to the rotating shaft 12 through the connecting assembly, the outer wall of the mounting cover 101 is fixedly mounted with a water inlet pipe 7 and a drain pipe 8 connected to the water flow chamber 102, the outer wall of the water inlet pipe 7 is connected with a diversion pipe 9, the other end of the diversion pipe 9 is connected with a mixing pipe 4, the output end of the second pump body 3 is installed with a first connecting pipe 10, the output end of the first pump body 2 is installed with a second connecting pipe 6, and the first connecting pipe 10 and the second connecting pipe 6 are both connected to the mixing pipe 4.

[0031] Among them, the first pump body 2 is a foam pump, which realizes work by rotating the driving end, which is the existing technology. At the same time, the input end of the first pump body 2 is installed with a bubble inlet pipe 5, which is used to connect to an external foam source.

[0032] It should be noted here that the mounting cover 101 is the outer shell of the drive assembly 1 and the two raised parts inside. The outer shell and the two raised parts inside are integrated, and bearings are installed on the opposite sides of the two raised parts. The rotating shaft 12 is fixed to the inner walls of the two bearings, and the two ends of the rotating shaft 12 respectively pass through the corresponding raised parts and extend to the outside of the outer shell, and the impeller 13 is installed between the two raised parts.

[0033] In addition, the impeller 13 is located between the water inlet pipe 7 and the drain pipe 8. When water with a certain pressure enters the water flow chamber 102 through the water inlet pipe 7, the impeller 13 will rotate under the impact of the water flow. When the impeller 13 rotates, it will drive the rotating shaft 12 to rotate, and then drive the first pump body 2 and the second pump body 3 to work at the same time. When the first pump body 2 works, the foam in the external foam barrel will be transported to the mixing tube 4 through the second connecting pipe 6, and when the second pump body 3 works, the compressed air will be transported to the mixing tube 4 through the first connecting pipe 10, so that the foam, water and compressed air can be mixed in the mixing tube 4 to form compressed air extinguishing and foam, which are then sprayed out to extinguish the fire.

[0034] Since the device eliminates the power device, it can reduce weight, reduce size, and be easy to carry and use. It can be used in conjunction with existing fire trucks or garden water tankers. When fire trucks are difficult to reach, it can also be used in conjunction with hand pumps or portable water pumps for outdoor forest fire fighting, which greatly improves the convenience of using the device.

[0035] See also Figure 4 In this embodiment, a connecting cover 17 is fixedly installed on one side of the mounting cover 101 close to the first pump body 2 , and the first pump body 2 is fixedly installed on the inner wall of the connecting cover 17 by bolts.

[0036] The connecting cover 17 is provided to fix the first pump body 2 on the driving assembly 1 , and also facilitates the disassembly, assembly and maintenance of the first pump body 2 at a later stage.

[0037] See also Figure 5 and Figure 6In this embodiment, an air cavity 25 and a component cavity 26 are opened inside the second pump body 3, and the drive shaft 20 is rotatably installed inside the component cavity 26. The end of the drive shaft 20 away from the component cavity 26 extends to the outside of the second pump body 3, and a turntable 21 is fixedly installed on the end of the drive shaft 20 located inside the component cavity 26. A connecting rod 22 is rotatably installed on the side of the turntable 21 away from the drive shaft 20, and a movable rod 23 extending into the air cavity 25 is rotatably installed on the other end of the connecting rod 22. A piston 24 slidably connected to the inner wall of the air cavity 25 is fixedly installed on the other end of the movable rod 23. An air intake pipe 11 is installed on the side of the second pump body 3, and the air intake pipe 11 and the first connecting pipe 10 are both connected to the component cavity 26, and the surfaces of the air intake pipe 11 and the first connecting pipe 10 are both provided with one-way valves.

[0038] Among them, when the impeller 13 rotates, it will drive the rotating shaft 12 to rotate, and when the rotating shaft 12 rotates, it will drive the driving shaft 20 to rotate at the same time. When the driving shaft 20 rotates, the turntable 21 will rotate synchronously, so that the movable rod 23 will continuously move up and down under the drive of the connecting rod 22 on the surface of the turntable 21, and then the piston 24 will continuously move up and down. At this time, the air cavity 25 will continuously repeat the process of suction and exhaust, and finally the compressed gas will enter the interior of the mixing tube 4 through the first connecting pipe 10, thereby realizing the work of the second pump body 3.

[0039] In addition, a one-way intake valve is arranged on the surface of the intake pipe 11, and a one-way exhaust valve is arranged on the surface of the first connecting pipe 10.

[0040] See also Figure 5 In this embodiment, a connecting groove 18 is provided on one side of the mounting cover 101 close to the second pump body 3, and a positioning cover 19 extending into the connecting groove 18 is fixedly installed on the side of the second pump body 3, and the positioning cover 19 is fixed to the mounting cover 101 by bolts.

[0041] The connection groove 18 and the positioning cover 19 are provided to facilitate installation of the second pump body 3 on the driving assembly 1 , and also facilitate disassembly, assembly and maintenance of the second pump body 3 in the later stage.

[0042] It should be noted that the first connecting pipe 10 and the second connecting pipe 6 can be connected to the mixing pipe 4 by flange connection or threaded connection, which is convenient for disassembly and assembly of the first pump body 2 and the second pump body 3.

[0043] See also Figure 4 and Figure 5In this embodiment, both ends of the rotating shaft 12 extend to the outside of the mounting cover 101, and a sealing member 14 is further provided inside the mounting cover 101. The rotating shaft 12 is rotatably connected to the inner wall of the sealing member 14. The connecting assembly includes two square card slots 15 respectively provided at both ends of the rotating shaft 12. The driving end of the first pump body 2 and the end of the driving shaft 20 close to the driving assembly 1 are both fixedly mounted with a card block 16 extending into the corresponding square card slot 15.

[0044] Among them, by providing the sealing member 14 , water is not easily lost to the outside of the mounting cover 101 through the gap between the rotating shaft 12 and the mounting cover 101 , thereby improving the sealing performance of the driving assembly 1 .

[0045] It should be noted here that the seal 14 can be a sealing sleeve or a sealing ring. The seal 14 is arranged in the gap between the two raised parts in the mounting cover 101 and the rotating shaft 12, or it can be arranged only at the end of the gap between the raised part and the rotating shaft 12 to ensure the sealing effect.

[0046] In addition, the provided block 16 and square slot 15 facilitate the stable connection between the driving end of the first pump body 2 and the driving shaft 20 and the rotating shaft 12, so that the first pump body 2 and the second pump body 3 can work simultaneously when the rotating shaft 12 rotates.

[0047] In this embodiment, a control component is also provided inside the driving component 1, and the control component includes a circuit board arranged inside the driving component 1, and a control module and a wireless communication module are provided on the circuit board. A controller 27 is also installed on the driving component 1, and a flow control valve 28 is installed on the surface of the second connecting pipe 6, the shunt pipe 9 and the first connecting pipe 10. The control module, the wireless communication module, the controller 27 and the flow control valve 28 are all electrically connected to the circuit board.

[0048] Among them, through the control component provided, the amount of water, foam and compressed air entering the mixing tube 4 can be controlled to achieve a precise ratio of compressed air foam, thereby ensuring the effect of compressed air foam fire extinguishing.

[0049] In addition, a battery is provided inside the drive assembly 1 for powering the circuit board, the controller 27 and the flow control valve 28. One-way valves are also provided on the surfaces of the diversion pipe 9, the second connecting pipe 6 and the first connecting pipe 10 so that the mixed compressed air fire extinguishing foam can only be discharged through the mixing pipe 4.

[0050] It is worth noting that a mounting groove is provided on the inner side of the raised portion of the driving assembly 1 for mounting a circuit board and a battery so that they are not easily contaminated by water and affect normal use.

[0051] The present application also provides a method for a water-driven compressed air foam fire extinguishing device, comprising the following steps: The controller 27 opens each flow control valve 28 respectively, and adjusts each flow control valve 28 according to the proportional requirements, so as to control the amount of water, foam and compressed air entering the mixing pipe 4; Connect a water hose and a spray gun to the end of the mixing tube 4, then connect the water inlet pipe 7 to the external water pump, connect the drain pipe 8 to the inside of the external water tank, and finally connect the foam inlet pipe 5 of the first pump body 2 to the inside of the external foam barrel; Start the external water pump, so that water enters the water flow chamber 102 through the water inlet pipe 7 to drive the impeller 13 to rotate, thereby driving the first pump body 2 and the second pump body 3 to work at the same time; The mixed compressed air foam is sprayed out through the mixing pipe 4 to extinguish the fire.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water-driven compressed air foam fire extinguishing device, characterized in that: It comprises a driving assembly, and a first pump body and a second pump body are respectively installed on both sides of the driving assembly; The driving assembly comprises a mounting cover and a water flow chamber, a rotating shaft is arranged inside the mounting cover, an impeller is arranged on the rotating shaft, and the impeller is located inside the water flow chamber; The driving end of the second pump body is provided with a driving shaft, and the driving end of the first pump body and one end of the driving shaft close to the driving component are both provided with a connecting component, and the driving end of the second pump body and the driving shaft are connected to the rotating shaft through the connecting component, and the outer wall of the mounting cover is fixedly installed with a water inlet pipe and a drain pipe connected to the water flow chamber, and the outer wall of the water inlet pipe is connected with a diversion pipe, and the other end of the diversion pipe is connected with a mixing pipe, the output end of the second pump body is installed with a first connecting pipe, and the output end of the first pump body is installed with a second connecting pipe, and the first connecting pipe and the second connecting pipe are both connected with the mixing pipe, and a control component is also provided inside the driving component.

2. A water-driven compressed air foam fire extinguishing device according to claim 1, characterized in that: The first pump body is a foam pump, and a foam inlet pipe is installed at the input end of the first pump body.

3. A water-driven compressed air foam fire extinguishing device according to claim 1, characterized in that: A connecting cover is fixedly mounted on one side of the mounting cover close to the first pump body, and the first pump body is fixedly mounted on the inner wall of the connecting cover by bolts.

4. A water-driven compressed air foam fire extinguishing device according to claim 1, characterized in that: The impeller is located between the water inlet pipe and the drain pipe.

5. A water-driven compressed air foam fire extinguishing device according to claim 1, characterized in that: An air cavity and a component cavity are provided inside the second pump body, the drive shaft is rotatably installed inside the component cavity, one end of the drive shaft away from the component cavity extends to the outside of the second pump body, a turntable is fixedly installed on the end of the drive shaft located inside the component cavity, a connecting rod is rotatably installed on the side of the turntable away from the drive shaft, a movable rod extending into the air cavity is rotatably installed on the other end of the connecting rod, a piston slidably connected to the inner wall of the air cavity is fixedly installed on the other end of the movable rod, an air intake pipe is installed on the side of the second pump body, the air intake pipe and the first connecting pipe are both connected to the component cavity, and one-way valves are provided on the surfaces of the air intake pipe and the first connecting pipe.

6. A water-driven compressed air foam fire extinguishing device according to claim 1, characterized in that: A connecting groove is formed on one side of the installation cover close to the second pump body, and a positioning cover extending into the connecting groove is fixedly mounted on the side of the second pump body, and the positioning cover is fixed to the installation cover by bolts.

7. A water-driven compressed air foam fire extinguishing device according to claim 1, characterized in that: Both ends of the rotating shaft extend to the outside of the mounting cover, a sealing member is further provided inside the mounting cover, and the rotating shaft is rotatably connected to the inner wall of the sealing member.

8. A water-driven compressed air foam fire extinguishing device according to claim 1, characterized in that: The connecting assembly comprises two square slots respectively provided at both ends of the rotating shaft, and the driving end of the first pump body and one end of the driving shaft close to the driving assembly are both fixedly mounted with a block extending into the corresponding square slots.

9. A water-driven compressed air foam fire extinguishing device according to claim 1, characterized in that: The control component includes a circuit board arranged inside the driving component, on which a control module and a wireless communication module are provided. A controller is also installed on the driving component. Flow control valves are installed on the surfaces of the second connecting pipe, the shunt pipe and the first connecting pipe. The control module, the wireless communication module, the controller and the flow control valve are all electrically connected to the circuit board.

10. A method of using a water-driven compressed air foam fire extinguishing device according to claim 1, characterized in that: The following steps are involved: The controller is used to open each flow control valve respectively, and each flow control valve is adjusted according to the proportional requirements, so as to control the amount of water, foam and compressed air entering the mixing pipe; Connect a water hose and a spray gun to the end of the mixing tube, connect the water inlet pipe to the external water pump, connect the drain pipe to the inside of the external water tank, and finally connect the foam inlet pipe of the first pump body to the inside of the external foam barrel; Start the external water pump, so that water enters the water flow chamber through the water inlet pipe to drive the impeller to rotate, thereby driving the first pump body and the second pump body to work at the same time; The mixed compressed air foam is sprayed through the mixing pipe to extinguish the fire.

Images