Heptafluoropropane foam fire extinguishing system

Abstract

The utility model discloses a heptafluoropropane foam fire extinguishing system, which relates to the technical field of fire fighting equipment and comprises a foaming agent storage tank, a water storage tank, a foaming stirring device, a mixing device, a heptafluoropropane storage tank and a fire water monitor. The mixing device is provided with a liquid inlet, a liquid inlet connecting pipe and a liquid outlet, the foaming agent storage tank is connected with the foaming agent inlet pipe through a foaming agent conveying pipeline, the water storage tank is connected with the fire fighting water inlet pipe through a fire fighting water conveying pipeline, and the foam liquid outlet pipe is connected with the liquid inlet through a foam conveying pipeline. The heptafluoropropane storage tank is connected with the liquid inlet connecting pipe through a liquid conveying pipeline, and the liquid outlet is connected with the fire water monitor through a gas foam output pipeline. The fire extinguishing effect is reduced; and the fire extinguishing speed is slowed down.

Description

Technical Field

[0001] The utility model relates to the technical field of fire fighting equipment, in particular to a heptafluoropropane foam fire extinguishing system. Background Art

[0002] Foam fire extinguishing system is a common fire extinguishing equipment, mainly used to extinguish liquid fires. The foam fire extinguishing system sprays a mixture of foaming agent and water onto the fire scene to form a layer of foam covering the surface of the burning liquid, effectively isolating oxygen and preventing the burning of the flame. The foam fire extinguishing system can effectively extinguish liquid fires, such as oil fires, solvent fires, etc., and can form a protective layer to prevent the fire from re-igniting. Foam fire extinguishing systems are generally divided into two types: liquid foam fire extinguishing system and gas foam fire extinguishing system. Liquid foam fire extinguishing systems are mainly suitable for fixed places, such as factories, warehouses, etc., while gas foam fire extinguishing systems are suitable for mobile equipment and vehicles, such as fire trucks, ships, etc.

[0003] The air foam fire extinguishing system in the prior art generally compresses the air through an air compressor, and then delivers the compressed air to a foam generator to foam with a foaming agent and fire water, and finally forms foam, which is then sprayed out through a fire foam water monitor. However, since compressed air contains oxygen, the presence of oxygen will lead to reduced fire extinguishing effect and slower fire extinguishing speed when extinguishing at the fire scene.

[0004] In the invention with application number: CN201510456107.1 and publication number: CN105148429A, a wind-powered foam fire extinguishing system is disclosed, which is composed of a spray, water supply, air supply and foam supply system. The spray is connected with the water supply, air supply and foam supply system, wherein the water supply and air supply are self-powered supply systems, and the foam supply system is powered by the water supply system to supply the foam mixture through a Venturi negative pressure supply device. However, it still uses compressed air containing oxygen for foaming, which will lead to reduced fire extinguishing effect and slower fire extinguishing speed when extinguishing the fire at the fire scene. Utility Model Content

[0005] Based on this, in order to solve the above problems, the utility model proposes a heptafluoropropane foam fire extinguishing system, which solves the problem that the current foam fire extinguishing system uses compressed air containing oxygen for foaming, which will lead to reduced fire extinguishing effect and slower fire extinguishing speed when extinguishing the fire at the fire scene.

[0006] The technical solution of the utility model is:

[0007] A heptafluoropropane foam fire extinguishing system, comprising a foaming agent storage tank, a water storage tank, a foaming stirring device, a mixing device, a heptafluoropropane storage tank and a fire water monitor, wherein the foaming stirring device is provided with a foaming agent inlet pipe, a fire water inlet pipe and a foam liquid outlet pipe, and the mixing device is provided with a liquid inlet, a liquid inlet connecting pipe and a liquid outlet;

[0008] The foam agent storage tank is connected to the foam agent inlet pipe through the foam agent delivery pipeline, and the foam agent delivery pipeline is sequentially provided with a foam agent solenoid valve, a foam agent metering pump and a foam agent one-way valve, the water storage tank is connected to the fire water inlet pipe through the fire water delivery pipeline, and the fire water delivery pipeline is sequentially provided with a fire water solenoid valve, a fire water metering pump and a fire water one-way valve, the foam liquid outlet pipe is connected to the liquid inlet through the foam delivery pipeline, and the foam delivery pipeline is sequentially provided with a foam solenoid valve, a foam pump and a foam one-way valve;

[0009] The HFC-227ea storage tank is connected to the liquid inlet connecting pipe through a liquid delivery pipeline, and a pressure reducing valve, a liquid solenoid valve and a liquid one-way valve are provided on the liquid delivery pipeline in sequence. The liquid outlet is connected to the fire water monitor through an air foam output pipeline, and an output solenoid valve and an output pump are provided on the air foam output pipeline.

[0010] Preferably, the foaming and stirring device includes a stirring tank body, a stirring and foaming component and a driving component. The stirring tank body has a accommodating cavity. The stirring and foaming component is arranged in the accommodating cavity, and two ends of the stirring and foaming component respectively pass through both sides of the stirring tank body. The stirring and foaming component is rotatably connected to the stirring tank body. The driving component is arranged on one side of the stirring tank body and is connected to the stirring and foaming component for driving the stirring and foaming component.

[0011] Preferably, the stirring and frothing component comprises a rotating stirring shaft and at least one pair of stirring members, and one end of the pair of stirring members is respectively fixedly connected to the rotating stirring shaft.

[0012] Preferably, the stirring member comprises a pair of connecting rods and a plurality of stirring rods arranged between the pair of connecting rods, both ends of the stirring rod are fixedly connected to the pair of connecting rods respectively, and there is a gap between two adjacent stirring rods.

[0013] Preferably, the number of the stirring elements is two pairs.

[0014] Preferably, it also includes a mounting bracket, and the stirring tank body and the driving assembly are cooperatively mounted on the mounting bracket.

[0015] Preferably, the driving assembly includes a driving motor, a driving wheel, a driven wheel, a connecting shaft and a rotating mounting seat. A fixed bracket is provided on one side of the stirring tank body, the fixed bracket is fixedly set on the mounting bracket, the rotating mounting seat is set on the fixed bracket and is coordinated with the stirring tank body, the connecting shaft passes through the rotating mounting seat and is rotatably connected to the rotating mounting seat, one end of the connecting shaft is fixedly connected to the rotating stirring shaft through a coupling, the driven wheel is fixedly connected to the other end of the connecting shaft, the driving motor is set on one side of the fixed bracket and mounted on the mounting bracket, the driving wheel is fixedly set on the output shaft of the driving motor, and the driving wheel and the driven wheel are driven by a belt.

[0016] Preferably, the foam agent inlet pipe and the fire water inlet pipe are arranged at the top of the stirring tank body and are respectively located on both sides of the top of the stirring tank body. The foam agent inlet pipe and the fire water inlet pipe are connected to the accommodating cavity. The foam liquid outlet pipe is arranged at the bottom of one side of the stirring tank body and is connected to the accommodating cavity.

[0017] Preferably, the mixing device includes an entry portion, a connecting portion and an outlet portion which are connected in sequence, and a gas-liquid flow channel is provided in the entry portion, the connecting portion and the outlet portion, a liquid inlet pipe is provided on one side of the entry portion, one end of the liquid inlet pipe is located in the gas-liquid flow channel in the entry portion, and the other end passes through the entry portion and is fixedly connected to the entry portion, and an atomizing nozzle is provided at one end of the liquid inlet pipe located in the gas-liquid flow channel.

[0018] Preferably, the liquid inlet is arranged at one end of the entrance part and is connected to the gas-liquid flow channel, the liquid outlet is arranged at one end of the outlet part and is connected to the gas-liquid flow channel, and the liquid inlet connecting pipe is arranged at the top of the liquid inlet pipeline and is connected to the liquid inlet pipeline.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] When in use, the foaming agent in the foaming agent storage tank enters the foaming stirring device through the foaming agent delivery pipe and the foaming agent inlet pipe, and at the same time, the water in the water storage tank enters the foaming stirring device through the fire water delivery pipe and the fire water inlet pipe, in the foaming stirring device, the foaming agent and water are mixed and stirred to form a foam liquid, and the foam liquid enters the mixing device through the foam liquid outlet pipe, the foam delivery pipe and the liquid inlet, and at the same time, the heptafluoropropane in the heptafluoropropane storage tank enters the mixing device through the liquid delivery pipe, in the mixing device, the foam liquid and the heptafluoropropane are mixed to form heptafluoropropane foam, and finally, the heptafluoropropane foam enters the fire water monitor through the liquid outlet and the gas foam output pipe, and is sprayed to the fire scene by the fire water monitor to extinguish the fire. The utility model has good fire extinguishing performance and environmental protection performance, and at the same time, heptafluoropropane is used instead of compressed air, which solves the problem that the current foam fire extinguishing system uses compressed air containing oxygen for foaming, which will lead to reduced fire extinguishing effect and slow fire extinguishing speed when extinguishing the fire at the fire scene. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a heptafluoropropane foam fire extinguishing system described in an embodiment of the utility model;

[0022] Figure 2 The structure of the foaming stirring device described in the embodiment of the utility model is schematically shown. Figure 1 ;

[0023] Figure 3 The structure of the foaming stirring device described in the embodiment of the utility model is schematically shown. Figure 2 ;

[0024] Figure 4 It is a partial structural schematic diagram of the foaming and stirring device described in the embodiment of the utility model;

[0025] Figure 5 The structure of the mixing device described in the embodiment of the utility model is schematically shown in FIG. Figure 1 ;

[0026] Figure 6 The structure of the mixing device described in the embodiment of the utility model is schematically shown in FIG. Figure 2 ;

[0027] Figure 7 It is a schematic cross-sectional structure diagram of the mixing device described in the embodiment of the utility model;

[0028] Description of reference numerals:

[0029] 10-foam agent storage tank, 100-foam agent inlet pipe, 101-fire water inlet pipe, 102-foam liquid outlet pipe, 103-liquid inlet, 104-liquid inlet connecting pipe, 105-liquid outlet, 106-foam agent delivery pipeline, 107-foam agent solenoid valve, 108-foam agent metering pump, 109-foam agent one-way valve, 110-fire water delivery pipeline, 111-fire water solenoid valve, 112-fire water metering pump, 113-fire water one-way valve, 114-foam delivery pipeline, 115-foam solenoid valve, 116-foam pump, 117-foam one-way valve, 118-liquid delivery pipeline, 119-pressure reducing valve, 120-liquid solenoid valve, 121-liquid one-way valve, 122-gas foam output pipeline, 123-output electric Magnetic valve, 124-output pump, 20-water storage tank, 30-foaming stirring device, 300-stirring tank body, 301-stirring foaming component, 302-driving component, 303-accommodating cavity, 304-rotating stirring shaft, 305-stirring member, 306-connecting rod, 307-stirring rod, 308-mounting bracket, 309-driving motor, 310-driving wheel, 311-driven wheel, 312-connecting rotating shaft, 313-rotating mounting seat, 314-fixed bracket, 315-coupling, 316-belt, 40-mixing device, 400-entry part, 401-connecting part, 402-exit part, 403-gas-liquid flow channel, 404-liquid inlet pipe, 405-atomizing nozzle, 50-HFC-227ea storage tank, 60-fire water cannon. DETAILED DESCRIPTION

[0030] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0031] Example:

[0032] like Figure 1 , Figure 2 , Figure 5 , Figure 6 As shown, in order to solve the above problems, this embodiment discloses a heptafluoropropane foam fire extinguishing system, including a foam agent storage tank 10, a water storage tank 20, a foaming stirring device 30, a mixing device 40, a heptafluoropropane storage tank 50 and a fire water monitor 60, the foaming stirring device 30 is provided with a foam agent inlet pipe 100, a fire water inlet pipe 101 and a foam liquid outlet pipe 102, and the mixing device 40 is provided with a liquid inlet 103, a liquid inlet connecting pipe 104 and a liquid outlet 105;

[0033] The foam agent storage tank 10 is connected to the foam agent inlet pipe 100 through the foam agent delivery pipe 106, and the foam agent delivery pipe 106 is sequentially provided with a foam agent solenoid valve 107, a foam agent metering pump 108 and a foam agent one-way valve 109, the water storage tank 20 is connected to the fire water inlet pipe 101 through the fire water delivery pipe 110, and the fire water delivery pipe 110 is sequentially provided with a fire water solenoid valve 111, a fire water metering pump 112 and a fire water one-way valve 113, the foam liquid outlet pipe 102 is connected to the liquid inlet 103 through the foam delivery pipe 114, and the foam delivery pipe 114 is sequentially provided with a foam solenoid valve 115, a foam pump 116 and a foam one-way valve 117;

[0034] The HFC-227ea storage tank 50 is connected to the liquid inlet connecting pipe 104 through a liquid delivery pipe 118, and the liquid delivery pipe 118 is provided with a pressure reducing valve 119, a liquid solenoid valve 120 and a liquid one-way valve 121 in sequence, and the liquid outlet 105 is connected to the fire water monitor 60 through an air foam output pipe 122, and the air foam output pipe 122 is provided with an output solenoid valve 123 and an output pump 124.

[0035] When in use, the foaming agent in the foaming agent storage tank 10 enters the foaming stirring device 30 through the foaming agent delivery pipe 106 and the foaming agent inlet pipe 100. At the same time, the water in the water storage tank 20 enters the foaming stirring device 30 through the fire water delivery pipe 110 and the fire water inlet pipe 101. In the foaming stirring device 30, the foaming agent and water are mixed and stirred to form a foam liquid. The foam liquid enters the mixing device 40 through the foam liquid outlet pipe 102, the foam delivery pipe 114 and the liquid inlet 103. At the same time, the heptafluoropropane in the heptafluoropropane storage tank 50 enters the mixing device 40 through the liquid delivery pipe 118. In the mixing device 40, the foam liquid and heptafluoropropane are mixed to form heptafluoropropane foam. Finally, the heptafluoropropane foam enters the fire water monitor 60 through the liquid outlet 105 and the gas foam output pipe 122, and is sprayed to the fire scene by the fire water monitor 60 for fire extinguishing. The utility model has good fire extinguishing performance and environmental protection performance, and adopts heptafluoropropane instead of compressed air, which solves the problem that the current foam fire extinguishing system uses compressed air containing oxygen for foaming, which leads to reduced fire extinguishing effect and slow fire extinguishing speed when extinguishing fire at the fire scene.

[0036] Among them, the foam agent solenoid valve 107, the foam agent metering pump 108 and the foam agent one-way valve 109 are used to control the delivery and delivery amount of the foam agent, the fire water solenoid valve 111, the fire water metering pump 112 and the fire water one-way valve 113 are used to control the delivery and delivery amount of water, the foam solenoid valve 115, the foam pump 116 and the foam one-way valve 117 are used to control the delivery of foam liquid, the pressure reducing valve 119, the liquid solenoid valve 120 and the liquid one-way valve 121 are used to control the delivery of heptafluoropropane, and the output solenoid valve 123 and the output pump 124 are used to control the delivery of heptafluoropropane foam.

[0037] like Figures 2 to 4 As shown, in order to facilitate the foaming after the foaming agent is mixed with water, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that the foaming and stirring device 30 includes a stirring tank body 300, a stirring and foaming component 301 and a driving component 302. The stirring tank body 300 has a accommodating cavity 303, the stirring and foaming component 301 is arranged in the accommodating cavity 303, and the two ends of the stirring and foaming component 301 respectively pass through the two sides of the stirring tank body 300, the stirring and foaming component 301 is rotatably connected to the stirring tank body 300, and the driving component 302 is arranged on one side of the stirring tank body 300 and is connected to the stirring and foaming component 301 for driving the stirring and foaming component 301.

[0038] When in use, the driving component 302 drives the stirring and foaming component 301, thereby achieving foaming after the foaming agent and water are mixed.

[0039] In order to further facilitate the foaming after the foaming agent is mixed with water, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that the stirring and foaming component 301 includes a rotating stirring shaft 304 and at least a pair of stirring members 305, and one end of the pair of stirring members 305 is fixedly connected to the rotating stirring shaft 304 respectively.

[0040] Preferably, the stirring member 305 includes a pair of connecting rods 306 and a plurality of stirring rods 307 disposed between the pair of connecting rods 306 , both ends of the stirring rod 307 are fixedly connected to the pair of connecting rods 306 , and there is a gap between two adjacent stirring rods 307 .

[0041] Preferably, the number of stirring members 305 is two pairs.

[0042] When in use, the driving assembly 302 drives the stirring shaft 304 to rotate, thereby driving the stirring member 305 to rotate and stir the foaming agent and water, thereby achieving foaming after the foaming agent and water are mixed. Providing two pairs of stirring members 305 can more conveniently make the foaming agent and water mix and foam.

[0043] In order to facilitate the installation of the stirring tank body 300 and the driving assembly 302, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that it also includes a mounting bracket 308, and the stirring tank body 300 and the driving assembly 302 are cooperatively mounted on the mounting bracket 308.

[0044] In order to facilitate driving the rotating stirring shaft 304, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that the driving component 302 includes a driving motor 309, a driving wheel 310, a driven wheel 311, a connecting shaft 312 and a rotating mounting seat 313. A fixed bracket 314 is provided on one side of the stirring tank body 300. The fixed bracket 314 is fixedly set on the mounting bracket 308. The rotating mounting seat 313 is set on the fixed bracket 314 and is arranged in cooperation with the stirring tank body 300. The connecting shaft 312 passes through the rotating mounting seat 313 and is rotatably connected to the rotating mounting seat 313. One end of the connecting shaft 312 is fixedly connected to the rotating stirring shaft 304 through a coupling 315. The driven wheel 311 is fixedly connected to the other end of the connecting shaft 312. The driving motor 309 is set on one side of the fixed bracket 314 and is installed on the mounting bracket 308. The driving wheel 310 is fixedly set on the output shaft of the driving motor 309. The driving wheel 310 and the driven wheel 311 are driven by a belt 316.

[0045] The belt 316, the driving wheel 310 and the driven wheel 311 adopt the belt transmission structure of the present utility model in the prior art.

[0046] When in use, the driving motor 309 drives the driving wheel 310, which in turn drives the driven wheel 311 driven by the belt 316, and then drives the connecting shaft 312 to rotate on the rotating mounting seat 313, and then drives the rotating stirring shaft 304 connected to the connecting shaft 312 through the coupling 315 to rotate.

[0047] Preferably, the foam agent inlet pipe 100 and the fire water inlet pipe 101 are arranged at the top of the stirring tank body 300, and are respectively located on both sides of the top of the stirring tank body 300, the foam agent inlet pipe 100 and the fire water inlet pipe 101 are connected to the accommodating cavity 303, and the foam liquid outlet pipe 102 is arranged at the bottom of one side of the stirring tank body 300, and is connected to the accommodating cavity 303.

[0048] like Figures 5 to 7As shown, in order to facilitate mixing of heptafluoropropane and foam liquid, this embodiment is modified on the basis of the above embodiment. The difference from the above embodiment is that the mixing device 40 includes an inlet portion 400, a connecting portion 401 and an outlet portion 402 which are connected in sequence, and a gas-liquid flow channel 403 is provided in the inlet portion 400, the connecting portion 401 and the outlet portion 402. A liquid inlet pipe 404 is provided on one side of the inlet portion 400, one end of the liquid inlet pipe 404 is located in the gas-liquid flow channel 403 in the inlet portion 400, and the other end passes through the inlet portion 400 and is fixedly connected to the inlet portion 400, and an atomizing nozzle 405 is provided at one end of the liquid inlet pipe 404 located in the gas-liquid flow channel 403.

[0049] Preferably, the liquid inlet 103 is arranged at one end of the entrance part 400 and is connected to the gas-liquid flow channel 403, the liquid outlet 105 is arranged at one end of the outlet part 402 and is connected to the gas-liquid flow channel 403, and the liquid inlet connecting pipe 104 is arranged at the top of the liquid inlet pipe 404 and is connected to the liquid inlet pipe 404.

[0050] When in use, the setting of the atomizing nozzle 405 can make the heptafluoropropane in aerosol form when entering the gas-liquid flow channel 403, thereby facilitating the formation of heptafluoropropane foam.

[0051] Working principle of this utility model:

[0052] When in use, the foaming agent in the foaming agent storage tank 10 enters the foaming stirring device 30 through the foaming agent delivery pipe 106 and the foaming agent inlet pipe 100. At the same time, the water in the water storage tank 20 enters the foaming stirring device 30 through the fire water delivery pipe 110 and the fire water inlet pipe 101. In the foaming stirring device 30, the foaming agent and water are mixed and stirred to form a foam liquid. The foam liquid enters the mixing device 40 through the foam liquid outlet pipe 102, the foam delivery pipe 114 and the liquid inlet 103. At the same time, the heptafluoropropane in the heptafluoropropane storage tank 50 enters the mixing device 40 through the liquid delivery pipe 118. In the mixing device 40, the foam liquid and heptafluoropropane are mixed to form heptafluoropropane foam. Finally, the heptafluoropropane foam enters the fire water monitor 60 through the liquid outlet 105 and the gas foam output pipe 122, and is sprayed to the fire scene by the fire water monitor 60 for fire extinguishing.

[0053] The above-mentioned embodiments only express the specific implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A heptafluoropropane foam fire extinguishing system, characterized in that: The invention comprises a foaming agent storage tank (10), a water storage tank (20), a foaming stirring device (30), a mixing device (40), a heptafluoropropane storage tank (50) and a fire water monitor (60); the foaming stirring device (30) is provided with a foaming agent inlet pipe (100), a fire water inlet pipe (101) and a foam liquid outlet pipe (102); and the mixing device (40) is provided with a liquid inlet (103), a liquid inlet connecting pipe (104) and a liquid outlet (105); The foam agent storage tank (10) is connected to the foam agent inlet pipe (100) through a foam agent delivery pipe (106), and the foam agent delivery pipe (106) is provided with a foam agent electromagnetic valve (107), a foam agent metering pump (108) and a foam agent non-return valve (109) in sequence; the water storage tank (20) is connected to the fire water inlet pipe (101) through a fire water delivery pipe (110), and the fire water delivery pipe (110) is provided with a fire water electromagnetic valve (111), a fire water metering pump (112) and a fire water non-return valve (113) in sequence; the foam liquid outlet pipe (102) is connected to the liquid inlet (103) through a foam delivery pipe (114), and the foam delivery pipe (114) is provided with a foam electromagnetic valve (115), a foam pump (116) and a foam non-return valve (117) in sequence; The HFC-227ea storage tank (50) is connected to a liquid inlet connecting pipe (104) via a liquid delivery pipe (118), and a pressure reducing valve (119), a liquid solenoid valve (120) and a liquid one-way valve (121) are sequentially arranged on the liquid delivery pipe (118); the liquid outlet (105) is connected to a fire-fighting water monitor (60) via an air foam output pipe (122), and an output solenoid valve (123) and an output pump (124) are arranged on the air foam output pipe (122).

2. A heptafluoropropane foam fire extinguishing system according to claim 1, characterized in that: The foaming and stirring device (30) comprises a stirring tank body (300), a stirring and foaming component (301) and a driving component (302); the stirring tank body (300) has a containing cavity (303); the stirring and foaming component (301) is arranged in the containing cavity (303); and two ends of the stirring and foaming component (301) respectively penetrate two sides of the stirring tank body (300); the stirring and foaming component (301) is rotatably connected to the stirring tank body (300); and the driving component (302) is arranged on one side of the stirring tank body (300) and is connected to the stirring and foaming component (301) for driving the stirring and foaming component (301).

3. A heptafluoropropane foam fire extinguishing system according to claim 2, characterized in that: The stirring and foaming component (301) comprises a rotating stirring shaft (304) and at least one pair of stirring members (305), and one end of the pair of stirring members (305) is respectively fixedly connected to the rotating stirring shaft (304).

4. A heptafluoropropane foam fire extinguishing system according to claim 3, characterized in that: The stirring member (305) comprises a pair of connecting rods (306) and a plurality of stirring rods (307) arranged between the pair of connecting rods (306). Both ends of the stirring rod (307) are respectively fixedly connected to the pair of connecting rods (306), and a gap is provided between two adjacent stirring rods (307).

5. A heptafluoropropane foam fire extinguishing system according to claim 4, characterized in that: The number of stirring members (305) is two pairs.

6. A heptafluoropropane foam fire extinguishing system according to claim 5, characterized in that: It also includes a mounting bracket (308), on which the stirring tank body (300) and the driving assembly (302) are cooperatively mounted.

7. A heptafluoropropane foam fire extinguishing system according to claim 6, characterized in that: The driving assembly (302) includes a driving motor (309), a driving wheel (310), a driven wheel (311), a connecting shaft (312) and a rotating mounting seat (313). A fixed bracket (314) is provided on one side of the stirring tank body (300). The fixed bracket (314) is fixedly arranged on the mounting bracket (308). The rotating mounting seat (313) is arranged on the fixed bracket (314) and is arranged in cooperation with the stirring tank body (300). The connecting shaft (312) passes through the rotating mounting seat (313) and is connected to the rotating mounting seat (313). The mounting seat (313) is rotatably connected, one end of the connecting shaft (312) is fixedly connected to the rotating stirring shaft (304) through a coupling (315), and the driven wheel (311) is fixedly connected to the other end of the connecting shaft (312). The driving motor (309) is arranged on one side of the fixed bracket (314) and is installed on the mounting bracket (308). The driving wheel (310) is fixedly arranged on the output shaft of the driving motor (309), and the driving wheel (310) and the driven wheel (311) are driven by a belt (316).

8. A heptafluoropropane foam fire extinguishing system according to claim 7, characterized in that: The foam agent inlet pipe (100) and the fire water inlet pipe (101) are arranged at the top of the stirring tank body (300) and are respectively located on both sides of the top of the stirring tank body (300). The foam agent inlet pipe (100) and the fire water inlet pipe (101) are in communication with the containing cavity (303). The foam liquid outlet pipe (102) is arranged at the bottom of one side of the stirring tank body (300) and is in communication with the containing cavity (303).

9. A heptafluoropropane foam fire extinguishing system according to claim 1 or 8, characterized in that: The mixing device (40) comprises an inlet portion (400), a connecting portion (401) and an outlet portion (402) which are connected in sequence, a gas-liquid flow channel (403) being provided in the inlet portion (400), the connecting portion (401) and the outlet portion (402), a liquid inlet pipe (404) being provided on one side of the inlet portion (400), one end of the liquid inlet pipe (404) being located in the gas-liquid flow channel (403) in the inlet portion (400), and the other end of the liquid inlet pipe (404) passing through the inlet portion (400) and being fixedly connected to the inlet portion (400), and an atomizing nozzle (405) being provided at one end of the liquid inlet pipe (404) being located in the gas-liquid flow channel (403).

10. A heptafluoropropane foam fire extinguishing system according to claim 9, characterized in that: The liquid inlet (103) is arranged at one end of the inlet portion (400) and is in communication with the gas-liquid flow channel (403); the liquid outlet (105) is arranged at one end of the outlet portion (402) and is in communication with the gas-liquid flow channel (403); and the liquid inlet connecting pipe (104) is arranged at the top of the liquid inlet pipeline (404) and is in communication with the liquid inlet pipeline (404).

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