Foaming device for foam extinguishing agent production

Abstract

The utility model discloses a foaming device for foam extinguishing agent production, which relates to the technical field of extinguishing agents, and comprises a mobile flatcar, a mixing tank, a foam mixed liquid box and a heptafluoropropane gas storage bottle, the mobile flatcar is provided with the mixing tank, the mixing tank is internally provided with a stirring shaft, and the heptafluoropropane gas storage bottle is arranged in the stirring shaft. Through the arrangement of the stirring shaft, the spiral blade and the stirring blade, the stirring shaft can drive the spiral blade and the stirring blade to rotate, and the stirring blade can drive a foam mixed solution in the mixing tank to perform horizontal stirring, so that the foam mixed solution is fully mixed with heptafluoropropane gas; meanwhile, the spiral blade can drive the foam mixed liquid to roll up and down, so that the mixing uniformity is further improved, and the foaming effect is better, and due to the design that the included angle between the spray head connected with the foam mixed liquid conveying pipe and the air outlet of the air conveying pipe is 45 degrees, the foam mixed liquid and heptafluoropropane gas can be mixed in advance; the mixing effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire extinguishing agents, in particular to a foaming device for producing foam fire extinguishing agents. Background Art

[0002] Aqueous film-forming foam fire extinguisher is a kind of fire extinguisher that uses aqueous film-forming foam fire extinguishing agent as fire extinguishing agent. Aqueous film-forming foam fire extinguishing agent is a new type of high-efficiency foam fire extinguishing agent developed in the early 1960s. Its components are composed of fluorocarbon surfactants, hydrocarbon surfactants, additives and water. When the aqueous film-forming foam fire extinguishing agent is sprayed onto the burning oil surface, the foam spreads on the oil surface on one side and forms a layer of water film on the oil surface on the other side, which inhibits the evaporation of the oil, isolates it from the air, and makes the foam quickly spread to the area that has not been directly sprayed to further extinguish the fire. Heptafluoropropane foam fire extinguisher is a kind of aqueous film-forming foam fire extinguisher. It refers to a fire extinguishing system that uses heptafluoropropane to replace air on the basis of ordinary air foam fire extinguisher, and uses heptafluoropropane foam generator to produce heptafluoropropane gas foam with a volume expansion of less than 20 times. The fire is extinguished by the covering and isolation effect of the foam and the chemical inhibition and cooling effect of heptafluoropropane gas.

[0003] After searching, the patent authorization announcement number CN209848874U discloses a water-forming foam fire extinguishing agent production device, which records that "it includes a kettle body and a stirrer, the stirrer includes a stirring motor and a stirring paddle, and the stirring paddle is arranged in a guide tube". However, the above-mentioned existing stirrer can only stir and mix the mixed liquid horizontally, and the mixing effect is poor, which in turn affects the production quality of the foam fire extinguishing agent. Utility Model Content

[0004] The utility model aims to provide a foaming device for producing foam fire extinguishing agent to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A foaming device for producing a foam fire extinguishing agent comprises a mobile flat car, a mixing tank, a foam mixture liquid tank and a heptafluoropropane gas cylinder, wherein the mobile flat car is provided with a mixing tank, a stirring shaft is arranged in the mixing tank, the stirring shaft is directly connected to an output shaft of a stirring motor installed on the top of the mixing tank, a stirring blade and a spiral blade are arranged on the stirring shaft, a foam mixture liquid tank and a heptafluoropropane gas cylinder are arranged on both sides of the mixing tank, a foam mixture liquid delivery pipe is inserted in the foam mixture liquid tank, the foam mixture liquid delivery pipe is connected to an inlet and outlet end of a water pump installed on the foam mixture liquid tank, the top end of the foam mixture liquid delivery pipe is connected to a nozzle embedded in the mixing tank, an outlet of the heptafluoropropane gas cylinder is connected to an air delivery pipe, the other end of the air delivery pipe is connected to the top of the mixing tank, an angle of 45° is formed between the nozzle and the air outlet of the air delivery pipe, a discharge valve is arranged at the bottom of the mixing tank, a foam generator is arranged at the bottom end of the discharge valve, and an outlet flange is arranged at the bottom end of the foam generator.

[0007] As a further solution of the utility model: the mobile flat car includes a vehicle plate, fixed wheels and steering wheels, and the fixed wheels and steering wheels are both installed at the bottom of the vehicle plate.

[0008] As a further solution of the utility model: a gas cylinder base is fixedly installed on the mobile flat car, and the heptafluoropropane gas cylinder is placed on the gas cylinder base.

[0009] As a further solution of the utility model: a pressure relief valve is installed on the top of the mixing tank.

[0010] As a further solution of the utility model: a gas flow meter and a gas control valve are installed on the gas delivery pipe, and a liquid flow meter is installed on the foam mixed liquid delivery pipe.

[0011] As a further solution of the utility model: handrails are installed on the front and rear ends of the mobile flat car, an outer frame is installed on the handrails, a controller is installed in the outer frame, and the controller is electrically connected to the stirring motor, the gas control valve and the water pump.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model is provided with a stirring shaft, a spiral blade and a stirring blade. The stirring shaft can drive the spiral blade and the stirring blade to rotate. The stirring blade can drive the foam mixture in the mixing tank to stir horizontally, so that the foam mixture and the heptafluoropropane gas are fully mixed. At the same time, the spiral blade can drive the foam mixture to roll up and down, further improving the mixing uniformity and achieving a better foaming effect.

[0014] 2. The utility model is designed such that the nozzle connected to the foam mixture delivery pipe and the gas outlet of the gas delivery pipe are at an angle of 45°. This design can pre-mix the foam mixture with the heptafluoropropane gas, thereby improving the mixing effect.

[0015] 3. The utility model is provided with a liquid flow meter and a gas flow meter, which can measure the foam mixture and the heptafluoropropane additives respectively, so that personnel can control the addition ratio of liquid and gas conveniently, thereby better ensuring the quality of foaming. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a schematic diagram of the structure of a foaming device for producing a foam fire extinguishing agent.

[0017] Figure 2 The present invention is a front view of a foaming device for producing a foam fire extinguishing agent.

[0018] Figure 3 A foaming device for producing foam fire extinguishing agent Figure 2 Top view of the base of the medium gas cylinder.

[0019] 1. Mobile flat car; 101. Car plate; 102. Steering wheel; 103. Steering wheel; 2. Mixing tank; 3. Stirring shaft; 4. Stirring motor; 5. Spiral blade; 6. Stirring blade; 7. Foam mixture tank; 8. Foam mixture delivery pipe; 9. Nozzle; 10. Gas cylinder base; 11. HFC-227ea gas cylinder; 12. Gas delivery pipe; 13. Liquid flow meter; 14. Gas flow meter; 15. Gas control valve; 16. Discharge valve; 17. Foam generator; 18. Outlet flange; 19. Pressure relief valve; 20. Handrail; 21. Outer frame; 22. Controller; 23. Water pump; 24. Gas cylinder placement hole. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-2In the embodiment of the utility model, a foaming device for producing a foam fire extinguishing agent comprises a mobile flat car 1, a mixing tank 2, a foam mixture tank 7 and a heptafluoropropane gas cylinder 11. The foam mixture tank 7 and the heptafluoropropane gas cylinder 11 are respectively arranged on both sides of the mixing tank 2. A foam mixture delivery pipe 8 is inserted into the foam mixture tank 7. The foam mixture delivery pipe 8 is connected to the inlet and outlet ends of a water pump 23 installed on the foam mixture tank 7. The top end of the foam mixture delivery pipe 8 is connected to a nozzle 9 embedded in the mixing tank 2. The outlet of the heptafluoropropane gas cylinder 11 is connected to a gas delivery pipe 12. The other end of the gas delivery pipe 12 is connected to the top of the mixing tank 2. The nozzle 9 is connected with the air outlet of the air pipe 12 at an angle of 45°. The air pipe 12 is provided with a gas flow meter 14 and a gas control valve 15. The foam mixture delivery pipe 8 is provided with a liquid flow meter 13. Both the gas flow meter 14 and the liquid flow meter 13 are vortex flow meters, which are well-known mature products and are not described in detail here. When in use, the water pump 23 draws out the foam mixture in the foam mixture tank 7, and the foam mixture is delivered to the nozzle 9 through the foam mixture delivery pipe 8 for spraying. At the same time, the heptafluoropropane gas in the heptafluoropropane gas cylinder 11 is delivered to the mixing tank 2 through the air pipe 12 and pre-mixed with the foam mixture.

[0022] See also Figure 1-2 The mobile flat car 1 includes a car plate 101, a directional wheel 102 and a steering wheel 103. The directional wheel 102 and the steering wheel 103 are both installed at the bottom of the car plate 101. Handrails 20 are installed at the front and rear ends of the mobile flat car 1. The setting of the mobile flat car 1 can make the device move more conveniently. An outer frame 21 is installed on the handrail 20, and a controller 22 is installed in the outer frame 21. The controller 22 is electrically connected to the stirring motor 4, the gas control valve 15 and the water pump 23. The model of the controller 22 is S7-200. The control circuit of the controller 22 can be realized by simple programming by technicians in this field, which belongs to the common knowledge in this field. In addition, the utility model is mainly used to protect mechanical devices, so the utility model will no longer explain the control method and circuit connection in detail.

[0023] See also Figure 1-2A mixing tank 2 is installed on the mobile flat car 1, and a stirring shaft 3 is arranged in the mixing tank 2. The stirring shaft 3 is directly connected to the output shaft of the stirring motor 4 installed on the top of the mixing tank 2. A stirring blade 6 and a spiral blade 5 are installed on the stirring shaft 3. A pressure relief valve 19 is installed on the top of the mixing tank 2. The pressure relief valve 19 can be used for safe exhaust when the pressure in the mixing tank 2 is too high to avoid explosion. A discharge valve 16 is installed at the bottom of the mixing tank 2, and a foam generator 17 is installed at the bottom of the discharge valve 16. An outlet flange 18 is installed at the bottom of the foam generator 17. After pre-mixing, the stirring motor 4 is turned on, and the stirring motor 4 drives the stirring shaft 3 to rotate, and the stirring shaft 3 drives the stirring blade 6 and the spiral blade 5 to rotate at the same time. The stirring blade 6 drives the foam mixture to rotate horizontally and mix with the gas, and the spiral blade 5 drives the foam mixture located at the bottom to roll upward, so as to further improve the mixing effect. The mixed heptafluoropropane foam mixture enters the foam generator 17 through the discharge valve 16, and can be sprayed to the fire scene for fire extinguishing after the foam is made by the foam generator 17.

[0024] See also Figure 3 A gas cylinder base 10 is fixedly installed on the mobile flat car 1, and a heptafluoropropane gas cylinder 11 is placed on the gas cylinder base 10. A gas cylinder placement hole 24 is opened on the gas cylinder base 10. The setting of the gas cylinder base 10 can prevent the gas cylinder base 10 from tipping over during the movement.

[0025] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A foaming device for producing a foam fire extinguishing agent, comprising a mobile flat car (1), a mixing tank (2), a foam mixed liquid tank (7) and a heptafluoropropane gas cylinder (11), characterized in that: The mobile flat car (1) is provided with a mixing tank (2), a stirring shaft (3) is arranged in the mixing tank (2), the stirring shaft (3) is directly connected to the output shaft of a stirring motor (4) installed on the top of the mixing tank (2), a stirring blade (6) and a spiral blade (5) are installed on the stirring shaft (3), a foam mixed liquid tank (7) and a heptafluoropropane gas cylinder (11) are respectively arranged on both sides of the mixing tank (2), a foam mixed liquid delivery pipe (8) is inserted in the foam mixed liquid tank (7), and the foam mixed liquid delivery pipe (8) is connected to a nozzle installed on the foam mixed liquid tank (7). At the inlet and outlet ends of the water pump (23), the top end of the foam mixed liquid delivery pipe (8) is connected to a nozzle (9) embedded in the mixing tank (2); the outlet of the heptafluoropropane gas cylinder (11) is connected to a gas delivery pipe (12); the other end of the gas delivery pipe (12) is connected to the top of the mixing tank (2); an angle of 45° is formed between the nozzle (9) and the gas outlet of the gas delivery pipe (12); a discharge valve (16) is installed at the bottom of the mixing tank (2); a foam generator (17) is installed at the bottom of the discharge valve (16); and an outlet flange (18) is installed at the bottom of the foam generator (17).

2. A foaming device for producing a foam fire extinguishing agent according to claim 1, characterized in that: The mobile flat car (1) comprises a vehicle plate (101), directional wheels (102) and steering wheels (103), wherein the directional wheels (102) and steering wheels (103) are both installed at the bottom of the vehicle plate (101).

3. A foaming device for producing a foam fire extinguishing agent according to claim 1, characterized in that: A gas cylinder base (10) is fixedly mounted on the mobile flat car (1), and the heptafluoropropane gas cylinder (11) is placed on the gas cylinder base (10).

4. A foaming device for producing a foam fire extinguishing agent according to claim 1, characterized in that: A pressure relief valve (19) is installed on the top of the mixing tank (2).

5. A foaming device for producing a foam fire extinguishing agent according to claim 1, characterized in that: A gas flow meter (14) and a gas control valve (15) are installed on the gas delivery pipe (12), and a liquid flow meter (13) is installed on the foam mixed liquid delivery pipe (8).

6. A foaming device for producing a foam fire extinguishing agent according to claim 1, characterized in that: The movable flat car (1) is provided with handrails (20) at the front and rear ends, an outer frame (21) is provided on the handrails (20), a controller (22) is provided inside the outer frame (21), and the controller (22) is electrically connected to the stirring motor (4), the gas control valve (15) and the water pump (23).

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