CN117442909A

CN117442909A - Non-pressure-storage suspension type compressed air foam fire extinguishing device

Info

Publication number: CN117442909A
Application number: CN202311409973.6A
Authority: CN
Inventors: 许修行; 许法山; 曾学义; 许成铜; 李小强; 张俊
Original assignee: Qingdao Sunyfire Science & Technology Shares Co ltd
Current assignee: Qingdao Sunyfire Science & Technology Shares Co ltd
Priority date: 2023-10-27
Filing date: 2023-10-27
Publication date: 2024-01-26

Abstract

The invention relates to the technical field of fire-fighting equipment, in particular to a non-pressure-storage suspension type compressed air foam fire-extinguishing device. The invention comprises the following components: the upper opening part comprises a fixed connecting piece and a tank opening pressing plate; the tank body component is used for generating compressed gas and containing foam premix liquid, and comprises a tank body and an inner partition plate transversely arranged in the tank body, and the tank body is divided into the following parts through the inner partition plate: a compressed gas generating cabin and a foam premix storage cabin; the lower mouth member includes a control actuator and an injector. The invention simplifies a large stack of auxiliary equipment such as a fire pump, a foam pump, an air compressor, a control valve, a flowmeter and the like of the CAFS, and the functions can be realized continuously; the device can effectively generate uniform and stable compressed air foam to extinguish fire through a small device without external auxiliary equipment to provide power.

Description

Non-pressure-storage suspension type compressed air foam fire extinguishing device

Technical Field

The invention relates to the technical field of fire-fighting equipment, in particular to a non-pressure-storage suspension type compressed air foam fire-extinguishing device.

Background

The compressed air foam fire extinguishing system (Compressed Air Foam System) is a novel fire-fighting and fire-preventing technology, and is abbreviated as CAFS in English and is one of the most advanced fire-fighting technologies in the world. The compressed air foam fire extinguishing system is a "high energy" system, its pressure source is in addition to the pressure of the water pump, and the air compression pump is also in pressure, and its pushed substance is a bubble containing moisture, so under the same condition, it can spray foam higher and far than traditional water or traditional mixed foam. CAFS has been widely used in developed countries such as europe and america and is becoming mature. Compared with pure water fire extinguishing, the fire extinguishing efficiency of the CAFS is improved by twenty times, the fire extinguishing water utilization rate is improved by eight times, and the possibility of reburning is greatly reduced. Because the mixed solution contains a large amount of compressed air, the weight of the fire extinguishing agent is reduced by 30 percent, thereby obviously improving the fire extinguishing mobility and simultaneously increasing the range. For example, chinese patent publication No. CN110559578A discloses a movable foaming device capable of adjusting gas-liquid ratio to compress gas foam, but CAFS has its drawbacks: if the system is huge, the number of the equipment is large, the structure is complex, and the control requirement is high; the production, the installation and the operation are relatively complex, and the maintenance difficulty is high; the operator needs special training, etc.

How to further simplify the fire pump, foam pump, air compressor, control valve, flowmeter and other auxiliary equipment of CAFS, and the functions are needed to be realized. How to further optimize the device, reduce the device quantity, make it miniaturized, integrate, reduce cost, accomplish simple and practical, make it can be applied in small-size place, through the combination use to enlarge its range of application, reduce cost is the actual need of laminating fire control more, is the subject that needs to solve at present.

Disclosure of Invention

The invention aims to solve the technical problems that: the defects of the prior art are overcome, a non-pressure-storage suspension type compressed air foam fire extinguishing device is provided, a fire pump, a foam pump, an air compressor, a control valve, a flowmeter and other large auxiliary equipment of CAFS are simplified, and the functions can be realized continuously; the device can effectively generate uniform and stable compressed air foam to extinguish fire through a small device without external auxiliary equipment to provide power.

The technical scheme of the invention is as follows:

a non-pressure-storage suspension type compressed air foam fire extinguishing device, which comprises the following components:

upper mouth piece, including fixed connection spare and jar mouth clamp plate, wherein:

a fixing connection for fixing the fire extinguishing apparatus near the object to be protected;

the tank opening pressing plate is used for closing the upper tank opening and fixing the gas production medicine box; the upper part of the device is connected with a fixed connecting piece, the lower part of the device is connected with a tank body part, and the middle part of the device is provided with a small hole matched with the initiating wire harness;

the tank body part is used for generating compressed gas and containing foam premix liquid, and comprises a tank body and an inner partition plate transversely arranged in the tank body, wherein the tank body is divided into the following parts through the inner partition plate:

the compressed gas generating cabin comprises a gas generating medicine box and a gas output control box, and is used for generating inert gas which can be used for extinguishing fire and continuously outputting until the foam premix liquid in the tank is completely changed into compressed air foam and is blown out of the tank body; the gas output control box is positioned on the partition plate in the middle of the tank body, the lower part of the gas output control box is connected with the connecting pipe through the partition plate and is used for timely opening when the pressure of the compressed gas producing cabin reaches the pressure required by design, so that the gas produced by the gas producing medicine box is led into the mixer through the connecting pipe;

the foam premix liquid storage cabin comprises a connecting pipe and a mixer and is used for containing foam premix liquid; the lower part of the connecting pipe is connected with a flow mixer, ventilation holes and transfusion holes are arranged around the connecting pipe at the upper part of the flow mixer, and a fine screen is arranged at the lower part of the flow mixer; the inert gas produced by the gas production medicine box is sprayed out at high speed through a circular inner nozzle in the flow mixer after passing through a connecting pipe, then continuously pressurized through a flow mixing cavity of the flow mixer, and is injected into the foam premix liquid at high speed and high pressure, the compressed gas and the foam premix liquid are fully mixed, and the mixture is expanded to form preliminary compressed air foam liquid after passing through a fine screen at high speed;

a lower mouth piece comprising a control actuator and a dedicated injector, wherein:

the control starter is used as a foam premix liquid filling port and a tank body lower port sealing tank external channel; when the device needs to act, the internal channel is opened after receiving the control signal; the upper port of the control starter is communicated with the lower port of the tank body, and the lower port of the control starter is connected with a special injector;

and the special ejector is used for sucking air from the outside, mixing the primary compressed air foam generated by the tank body into the air again, mixing and expanding the air again to generate final compressed air foam, and ejecting the compressed air foam outwards for extinguishing fire.

The working principle of the invention is as follows: from the working principle of CAFS, it can be seen that whether the foam liquid and fire-fighting water are fully and uniformly mixed and the gas-liquid ratio can reach 3-12 times is the key of the fire-extinguishing performance of compressed air foam. The invention sets the sealed compressed gas producing cabin which is isolated from the foam premix storage cabin; this technical key effect is achieved by a dual mixing mode of a primary dynamically mixed mixer and a secondary statically mixed dedicated ejector. The compressed gas generating cabin is arranged, so that the compressed gas with enough pressure can be ensured to be generated, and the continuous output is kept, and a continuous power source is provided for the compressed gas and the foam premix; the primary dynamic mixing is realized by a compressed gas cabin, a gas output control box, a connecting pipe and a mixer, high-pressure compressed gas in the compressed gas cabin is compressed by the connecting pipe, a circular inner nozzle at the front end of the mixer is particularly contracted and then ejected at high speed to form high-speed jet flow, a low-pressure area is formed around a nozzle guide opening, the area pressure difference and the hydraulic capacity act on suction foam premix liquid according to the Venturi nozzle principle, the high-speed working jet flow and the sucked liquid are ejected together in a mixing diffusion section in fluid delivery quantity, and then the high-speed working jet flow and the sucked liquid are ejected through a screen, so that the high-efficiency mixing of gas and liquid is realized; the secondary static mixing is realized by controlling the setting of the starter and the special ejector and utilizing the venturi tube principle again, so that the air is sucked from the outside, the secondary gas and liquid are mixed again, the gas-liquid ratio is further improved, and the uniformity and fineness of the compressed gas foam liquid are increased.

The gas output control box continuously outputs inert gas, so that the controllable continuous output of high pressure, the primary dynamic mixing of high-speed jet flow of the mixer and the secondary static mixing of external air suction of the special ejector are ensured, and the quality of produced compressed air foam is ensured; the momentum of fluid in the system is greatly improved, and the granularity of water is fully refined, so that the uniformity, fineness, durability and stability of the generated compressed gas foam are ensured, and no surge flow is generated. So that the sprayed compressed air foam is uniform, fine and stable and has excellent fire extinguishing and fire retarding effects.

In some of these embodiments, the gas generating cartridge comprises an upper cap and a cylindrical barrel, wherein:

the upper cover is used for closing the upper opening of the gas production medicine box and leading out a starting control wire harness through a small hole in the middle;

the cylinder is divided into an upper cavity and a lower cavity by an inner partition plate, the lower cavity is further divided into a left lower cavity and a right lower cavity by a middle partition plate, and a plurality of forming gas-producing grains with different diameters are respectively arranged in the upper cavity, the left lower cavity and the right lower cavity, wherein the diameter of the gas-producing grains in the upper cavity is larger than that of the gas-producing grains in the lower cavity.

In the technical scheme, the control wire harness can be an electric ignition head, a thermosensitive wire or a combination of the two. Firstly, a great amount of violent gas is rapidly generated by using a gas-generating explosive column in the upper cavity, the pressure is rapidly increased, the aluminum film is opened after the opening pressure set by the aluminum film is reached, and the reaction time of the device is prolonged. And then, the circular gas-generating explosive columns with relatively smaller diameters of the left lower chamber and the right lower chamber are utilized to continuously generate gas, so that the mixer can continuously maintain higher pressure and avoid secondary disasters caused by overhigh pressure. So that it is possible to continuously produce uniform compressed air foam, and the produced compressed air foam has sufficient initial kinetic energy.

In some embodiments, the circumference of the cylinder body of the gas generating medicine box is provided with round ventilation holes which are penetrated from inside to outside, the outside of the cylinder body is tightly wrapped by plastic adhesive tape or adhesive tinfoil paper, and the adhesive tinfoil paper is tightly wrapped on the outer surface of the medicine column.

In the technical scheme, the outer surfaces of all the formed grains are tightly wound with the tinfoil paper with glue, so that the unidirectional uniform combustion of the gas-producing grains can be ensured, and the conditions of deflagration and rapid combustion at multiple positions are avoided. Round ventilation holes which are internally and externally communicated are arranged on four sides of the medicine box cylinder body. The outside of the medicine box cylinder body is tightly wrapped by plastic adhesive tape or adhesive tinfoil paper, so that the effect of gas production is prevented from being influenced by moisture absorption and moisture absorption in the long-term storage process of the gas production agent.

In some embodiments, the gas output control box is a cylindrical structure comprising a stainless steel pressure pad, a sealed aluminum membrane, and a control box lower port, wherein:

the stainless steel pressing pad is wedged into the gas output control box and is used for pressing and fixing the sealing aluminum film;

the seal aluminum film is provided with cross or rice-shaped embossing, so that the seal aluminum film can be broken in time according to set requirements;

and the lower opening of the control box is used for fixing the gas output control box on a part of the partition plate in the tank body and sealing, and the lower part of the control box is connected with the connecting pipe.

In some embodiments, the connecting pipe is a section of straight pipe, and the upper end of the connecting pipe is connected with the gas output control box; the inner part of the lower end is gradually reduced to form a round nozzle and then is connected with a flow mixer; the upper part of the connecting pipe is connected with the gas output control box, the lower part is connected with the flow mixer, the front end of the connecting pipe is gradually reduced to form a fine circular nozzle structure for slowing down the flow rate of gas and increasing the pressure of output gas.

In some embodiments, the middle of the mixer is internally provided with a circular inner nozzle, and the circular inner nozzle is gradually reduced from the inside to the front end to form a circular nozzle for reducing the gas flow rate and increasing the pressure of output gas; a plurality of ventilation and transfusion holes are distributed on the periphery of the circular inner nozzle at the upper part of the flow mixer, a whole is formed by the middle cross fixed beam and the flow mixing cavity, and a fine screen is arranged at the outlet at the lower part; the compressed gas and the foam premix liquid are continuously pressurized and mixed through a circular inner nozzle in the mixer and a mixed flow cavity, and then are impacted to a fine screen at the lower part at high speed and high pressure to be expanded to form primary compressed air foam liquid.

In some embodiments, the foam premix storage tank is configured such that the smaller diameter of the actuation controller is configured to not return a small portion of the compressed air foam up the tank wall so as to agitate the foam premix to further homogenize the foam premix; in the high-speed spraying process of compressed gas through the connecting pipe and the mixer, negative pressure is formed at the cross fixed beam due to the change of the aperture, under the action of the negative pressure, foam premix is passively sucked into the mixer through the ventilation and transfusion holes, and the mixture formed by the foam premix and the compressed gas passes through a fine screen at the lower part of the mixing nozzle at high speed, so that further compressed air foam is formed;

the circulation is repeated for a plurality of times, so that the formed compressed air foam liquid is more uniform and finer;

the cycle is not completed until all of the liquid is ejected.

In some of these embodiments, the control actuator is an automatic control valve; after receiving the start signal, the primary compressed air foam generated by the mixer is opened and sprayed to the special sprayer through the channel inside the control starter.

In some of these embodiments, the dedicated injector comprises a nozzle, an aspiration structure, a negative pressure capsule, a pressurized throat section, a spray horn, a coarse screen, wherein:

after the compressed air foam liquid passes through the lower port of the control starter, the caliber is suddenly reduced, the compressed air foam liquid enters the nozzle and then enters the pressurizing throat section, negative pressure is formed between the compressed air foam liquid and the pressurizing throat section, external air is sucked through the negative pressure cabin, so that foam with larger air-liquid ratio is formed, and after a horn mouth and a coarse screen are sprayed, final compressed air foam is formed, and the final compressed air foam is sprayed outwards to extinguish fire.

Compared with the prior art, the invention has the following beneficial effects:

(1) The device can be matched with automatic detection equipment to realize automatic starting, so that the device can be operated without occupying a large space and without specially trained personnel;

(2) The device has no pressure at ordinary times, basically has no maintenance, simple structure and convenient installation, use and operation;

(3) The pressure is stable, the foam momentum at the jetting outlet is large, the foam can be jetted to a longer distance, and the foam is not easy to blow away by wind;

(4) The device can absorb air from the outside, the generated foam is fine and uniform, the stability is good, and the effective time of fire extinguishment and fire resistance is long;

(5) Can be used for efficiently extinguishing transformer fires, lithium battery fires and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a general assembly view of the present invention.

Fig. 2 is a schematic structural view of a gas generating cartridge.

Fig. 3 is a schematic diagram of the structure of the gas output control box.

Fig. 4 is a schematic structural view of the mixer.

Fig. 5 is a schematic structural view of the dedicated injector.

In the figure: 1. fixing the connecting piece; 2. a tank opening pressing plate; 3. a safety valve; 4. a gas generating medicine box; 401. an upper cover; 402. an upper chamber; 403. a partition plate; 404. a vent hole; 405. a lower left chamber; 406. a lower right chamber; 407. a middle partition plate; 408; a preformed hole; 409. a lower cover; 5. a gas output control box; 501. stainless steel press pads; 502. sealing the aluminum film; 503. a control box lower opening; 6. a tank body; 7. an inner partition plate; 8. a connecting pipe; 9. a flow mixer; 901. ventilation and transfusion holes; 902. fixing the cross beam; 903. a circular inner nozzle; 904. a mixed flow cavity; 905. fine screen; 10. a lower tank opening; 11. a control starter; 12. a dedicated injector; 1201. a getter structure; 1202. a nozzle; 1203. a negative pressure cabin; 1204. a throat section; 1205. spraying a horn mouth; 1206. coarse screen.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

Example 1

As shown in fig. 1, the present embodiment provides a non-pressure-storage suspension type compressed air foam fire extinguishing device, which comprises an upper port part, a tank part and a lower port part.

The upper opening part comprises a fixed connecting piece 1 and a tank opening pressing plate 2. The fixing connector 1 is used for hanging or hanging the fire extinguishing device on the upper part, the side part and the like of an object to be protected. The tank mouth pressing plate 2 is used for sealing an upper tank mouth and connecting the upper tank mouth with the fixed connecting piece 1, the lower part of the tank mouth pressing plate 2 is connected with the gas production medicine box 4, a small hole communicated with the gas production medicine box 4 is formed in the middle of the tank mouth pressing plate 2, and the tank mouth pressing plate is used for connecting an electric ignition head or a thermosensitive wire and the like in the gas production medicine box 4 to the lead-out of a wire harness and an external control part.

The tank body part is used for generating compressed gas and containing foam premix liquid fire extinguishing agent, and the interior of the tank body 6 is divided into an upper layer and a lower layer by the inner partition plate 7. The upper layer is used as a compressed gas producing cabin, and a gas producing medicine box 4 and a gas output control box 5 are arranged in the compressed gas producing cabin; the lower layer of the tank body 6 is used as a foam mixed liquid storage cabin, and a connecting pipe 8 and a mixer 9 are arranged in the tank body.

As shown in fig. 1, the gas generating medicine box 4 is positioned right below the tank mouth pressing plate 2.

The gas generating cartridge 4 is schematically shown in fig. 2 and comprises a cylindrical barrel, an upper cover 401 and a lower cover 409. The upper cover 401 is used for closing the upper opening of the gas production medicine box 4, and a starting control wire harness is led out through a small hole in the middle, and the control wire harness can be an electric ignition head, a thermosensitive wire or a combination of the two. The inside of the gas-generating medicine box 4 is divided into an upper cavity 402 and a lower cavity of the gas-generating medicine box 4 by a partition plate 403, the lower cavity is divided into a left lower cavity 405 and a right lower cavity 406 by a middle partition plate 407, and a plurality of circular gas-generating medicine columns with different diameters are respectively arranged in the upper cavity 402, the left lower cavity 405 and the right lower cavity 406, wherein the diameter of the gas-generating medicine column in the upper cavity 402 is larger than that of the medicine column in the lower cavity. All the outer surfaces of the grains are tightly wound with the adhesive tinfoil paper, so that the unidirectional uniform combustion of the gas-producing grains can be ensured, and the condition of rapid combustion together with multiple deflagrations is avoided. Round ventilation holes which are internally and externally communicated are arranged on four sides of the medicine box cylinder body. The outside of the medicine box cylinder body is tightly wrapped by transparent plastic adhesive tape or adhesive tinfoil paper, so that the effect of gas production is prevented from being influenced by moisture absorption and moisture absorption in the long-term storage process of the gas production agent.

The gas generating agent in the gas generating medicine box 4 is combusted to generate gas in the following sequence: the gas generator is ignited by an electric ignition head or a thermosensitive wire, the gas generator in the upper cavity 402 burns to the bottom gradually from the grain at the upper part of the gas generator box 4, the grain in the left lower cavity 405 is ignited by the vent 404 on the partition plate 403, the gas generator in the right lower cavity 406 is ignited by the reserved hole 408 between the middle partition plate 407 and the lower cover 409 after the grain in the left lower cavity 405 burns to the bottom continuously from top to bottom, and the gas generator is started to burn from bottom to top until the grain burns. The diameter of the grain in the upper cavity 402 is larger, the gas quantity generated by combustion in unit time is larger, so that the gas pressure in the compressed gas production cabin can be quickly increased, the opening pressure of the sealing aluminum film 502 in the gas output control box 5 can be quickly reached, the sealing aluminum film 502 is broken, the generated gas can smoothly enter the connecting pipe 8, the gas generating agent is continuously combusted after the sealing aluminum film 502 is opened, the generated gas continuously generates the gas, the generated gas is pressurized through the connecting pipe and then is injected into the mixer 9 at a high speed, and then is blown into the foam premix through the fine screen 905 at the lower part of the mixer 9, so that preliminary compressed air foam is generated. The amount of gas needed is reduced in time, which is favorable for generating uniform compressed foam, so that the diameters of the medicine columns in the left lower chamber 405 and the right lower chamber 406 of the medicine box are much smaller than those of the medicine columns in the upper chamber 402, and the gas production speed and the gas production amount of the gas production medicine columns are controlled by the diameter change of the medicine columns to realize the control requirement. The design of the gas generating cartridge 4 is critical to the invention in that it does not achieve the desired effect.

As shown in fig. 3, a schematic structure of the gas output control box 5 is shown. The main body of the gas output control box 5 is positioned above the inner partition plate 7 in the tank body 6, and the lower part of the gas output control box passes through the inner partition plate 7 of the tank body 6 and is connected with the connecting pipe 8; the gas output control box 5 is of a cylindrical structure and comprises a stainless steel pressure pad 501, a sealing aluminum film 502 and a control box lower opening 503. The stainless steel pressing pad 501 needs to be wedged into the gas output control box 5 for pressing and fixing the sealing aluminum film 502, and the cross or the rice shape needs to be formed on the sealing aluminum film 502, so that the sealing aluminum film 502 can be broken in time. The lower port is used to fix the gas output control box 5 to the partition plate 7 inside the tank 6, and the lower face is connected to the connection pipe 8.

The upper end of the connecting pipe 8 is a section of straight pipe, the inside of the lower end of the connecting pipe is gradually reduced to form a circular nozzle and then is connected with the flow mixer 9, the upper part of the connecting pipe is connected with the gas output control box 5, the lower part of the connecting pipe is connected with the flow mixer 9, the front end of the connecting pipe 8 is gradually reduced to form a fine circular nozzle 903 structure, and the structure is used for reducing the flow rate of gas and increasing the pressure of output gas.

As shown in fig. 4, the middle of the mixer 9 is internally provided with a circular inner nozzle 903, the upper part is provided with a plurality of ventilation and transfusion holes 901, a whole is formed by a cross fixed beam in the middle and a mixing cavity 904, a fine screen 905 is arranged at the lower outlet, gas generated by the gas generating medicine box 4 is firstly filled in a compressed gas generating cabin, after the pressure reaches a set pressure, a sealed aluminum film 502 of the gas output control box 5 is opened, the gas enters a connecting pipe 8 through a lower opening, after the gas is subjected to deceleration and pressurization through the connecting pipe 8, the gas enters a foam premix after continuously pressurizing through the circular inner nozzle 903 and the mixing cavity 904 in the mixer 9, and the gas is subjected to high-speed high-pressure flushing to the fine screen 905, so as to be expanded to form a preliminary compressed air foam. The compressed air foam is mostly absorbed again by the control actuator 11 into the special ejector 12, and is ejected after the final compressed air foam is formed.

It should be noted that a small portion of the compressed air foam that is not just sprayed back up the tank wall agitates the foam premix. In the process of high-speed ejection of compressed gas through the connecting pipe and the mixer 9, negative pressure is formed at the cross fixed beam due to the change of the aperture, under the action of the negative pressure, foam premix is passively sucked into the mixer 9 through the ventilation and infusion holes 901, and the mixture formed by the foam premix and the compressed gas passes through the fine screen 905 at the lower part of the mixing nozzle at high speed, so that further compressed air foam is formed. The circulation is repeated for a plurality of times, so that the formed compressed air foam liquid is more uniform; the cycle is not completed until all of the liquid is ejected.

The control starter 11 is used for closing the lower part of the tank body 6 at ordinary times, when a fire disaster or a situation needs to happen, the control starter 11 is opened after receiving a starting signal, and primary compressed air foam generated from the mixer 9 is sprayed to the special sprayer 12 through a channel inside the control starter 11. The control actuator 11 may be an electrically controlled ball valve, may have a closing function, may be opened electrically, or may have a similar structure for controlling the opening of the gas-liquid mixing passage.

As shown in FIG. 5, the special injector 12 has a nozzle 1202, an air suction structure 1201, a negative pressure chamber 1203, a pressurizing throat section 1204, a spraying bell 1205, a coarse screen 1206 and the like. After passing through the lower port of the control starter 11, the compressed air foam liquid enters the nozzle 1202 after the caliber is suddenly reduced, then enters the pressurizing throat section 1204, negative pressure is formed between the compressed air foam liquid and the nozzle, external air is sucked through the negative pressure cabin 1203, so that foam with larger air-liquid ratio is formed, and after the horn mouth 1205 and the coarse screen 1206 are sprayed, final compressed air foam is formed, and the final compressed air foam is sprayed outwards to extinguish fire.

All parts of the invention, the sealing aluminum film 502 is made of aluminum foil with the thickness of 1-2 mm, the sealing pad is a rubber pad or a silica gel pad, the electric ignition head and the thermosensitive wire are mine detonating devices, the compressed air, the gas generating agent and the foam premix fire extinguishing agent are selected from manufacturers, and the control starter 11, the screen and the safety valve 3 are all commercially available products; the rest of the tank body, the gas output control box 5, the special injector 12 and the like are made of stainless steel carbon steel through conventional machining, welding, corrosion-resistant treatment and the like.

Because the device has no national standard, no industry standard and no local standard reference, the device is made into a real object for test and inspection. Test environment, test equipment and test conditions are specified in the relevant regulations of GA13-2006 "suspension GAs fire extinguishing device" and GA602-2006 "dry powder fire extinguishing device". The compressed air foam liquid generated by spraying is used as a comparison reference with the product characteristic parameter value in a compressed air foam fire extinguishing system (CAFS 1000kg/1.0 or more) type test report of Tianjin fire control research institute of the emergency management department. Through practical experiment tests: the device of the invention is filled with 0.3% -3% of foam premix, the gas-liquid ratio of the generated compressed air foam can reach 3:1-12:1, the foaming multiple is more than or equal to 6, and the liquid separation time of 25% is more than or equal to 5min. From the above indexes, it can be seen that the compressed air foam produced by the device of the invention achieves the effect of the foam produced by a large compressed air foam system. The design requirement is met. The practical trial results are satisfactory, and the expected aim of the invention is achieved.

In view of the foregoing, it is intended that the present invention not be limited to the preferred embodiments of the present invention, but that any modifications, equivalents, improvements and modifications falling within the spirit and principles of the invention be included within the scope of the present invention.

Although the present invention has been described in detail by way of preferred embodiments with reference to the accompanying drawings, the present invention is not limited thereto. Various equivalent modifications and substitutions may be made in the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and it is intended that all such modifications and substitutions be within the scope of the present invention/be within the scope of the present invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A non-pressure-storage suspension type compressed air foam fire extinguishing device, which is characterized by comprising the following components:

upper mouth part, including fixed connection piece (1) and jar mouth clamp plate (2), wherein:

a fixing connection (1) for fixing the fire extinguishing device in the vicinity of the object to be protected;

a tank opening pressing plate (2) for closing the upper tank opening and fixing a gas production medicine box (4); the upper part of the device is connected with a fixed connecting piece (1), the lower part of the device is connected with a tank body part, and the middle part of the device is provided with a small hole matched with an initiating wire harness;

the tank body component is used for generating compressed gas and containing foam premix liquid, and comprises a tank body (6) and an inner partition plate (7) transversely arranged on the tank body (6), wherein the tank body (6) is divided into the following parts through the inner partition plate (7):

the compressed gas generating cabin comprises a gas generating medicine box (4) and a gas output control box (5) which are used for generating inert gas which can be used for extinguishing fire and continuously outputting until the foam premix liquid in the tank is completely changed into compressed air foam and is blown out of the tank body (6); the gas output control box (5) is positioned on the partition plate (7) in the middle of the tank body (6), the lower part of the gas output control box (5) is connected with the connecting pipe (8) after passing through the partition plate (7) and is used for timely opening when the pressure of the compressed gas producing cabin reaches the pressure required by design, so that the gas produced by the gas producing medicine box (4) is led into the mixer (9) through the connecting pipe (8);

the foam premix liquid storage cabin comprises a connecting pipe (8) and a mixer (9) and is used for containing foam premix liquid; the lower part of the connecting pipe (8) is connected with a flow mixer (9), ventilation and transfusion holes (901) are formed in the periphery of the upper connecting pipe (8) of the flow mixer (9), and a fine screen (905) is arranged at the lower part of the flow mixer (9); inert gas produced by the gas production medicine box (4) is sprayed out at high speed through a circular inner nozzle (903) in the mixer (9) after passing through a connecting pipe (8), then continuously pressurized through a mixing cavity (904) of the mixer (9), and is injected into foam premix liquid at high speed and high pressure, the compressed gas and the foam premix liquid are fully mixed, and the mixture is expanded to form preliminary compressed air foam liquid after passing through a fine screen (905) at high speed;

lower mouth piece comprising a control actuator (11) and a dedicated injector (12), wherein:

the control starter (11) is used as a foam premix liquid filling port and a lower port sealing tank external channel of the tank body (6); when the device needs to act, the internal channel is opened after receiving the control signal; the upper port of the control starter (11) is communicated with the lower port of the tank body (6), and the lower port of the control starter (11) is connected with a special injector (12);

and the special ejector (12) is used for sucking air from the outside, mixing the primary compressed air foam generated by the tank body (6) into the air for further mixing and expanding again to generate final compressed air foam, and ejecting the compressed air foam outwards for extinguishing fire.

2. The non-pressure-storage suspension type compressed air foam fire extinguishing apparatus according to claim 1, wherein the gas generating cartridge (4) comprises an upper cover (401) and a cylindrical barrel, wherein:

an upper cover (401) for closing the upper opening of the gas production medicine box (4) and leading out a starting control wire harness through a small hole in the middle;

the cylinder is divided into an upper cavity (402) and a lower cavity by an inner partition plate (7), the lower cavity is further divided into a left lower cavity (405) and a right lower cavity (406) by a middle partition plate (407), and a plurality of molded gas-producing grains with different diameters are respectively arranged in the upper cavity (402), the left lower cavity (405) and the right lower cavity (406), wherein the diameter of the gas-producing grains in the upper cavity (402) is larger than that of the gas-producing grains in the lower cavity.

3. The non-pressure-storage suspension type compressed air foam fire extinguishing device according to claim 2, wherein the circumference of the cylinder body of the gas production medicine box (4) is provided with round ventilation holes which are penetrated inside and outside, the outside of the cylinder body is tightly wrapped by plastic adhesive tape or adhesive tinfoil paper, and the outer surface of the medicine column is tightly wrapped by the adhesive tinfoil paper.

4. The non-pressure-storage suspension type compressed air foam fire extinguishing apparatus according to claim 1, wherein the gas output control box (5) is of a cylindrical structure, comprising a stainless steel pressure pad (501), a sealing aluminum film (502) and a control box lower opening (503), wherein:

a stainless steel pressing pad (501) is wedged into the gas output control box (5) and is used for pressing and fixing the sealing aluminum film (502);

the sealing aluminum film (502) is provided with cross or rice-shaped embossing, so that the sealing aluminum film (502) can be broken in time according to set requirements;

a control box lower opening (503) for fixing the gas output control box (5) to the partition plate (7) inside the tank body (6) and sealing, and the lower surface is connected with the connecting pipe (8).

5. The non-pressure-storage suspension type compressed air foam fire extinguishing device according to claim 1, wherein the connecting pipe (8) is a section of straight pipe, and the upper end is connected with the gas output control box (5); the inner part of the lower end is gradually reduced to form a round nozzle and then is connected with a flow mixer (9); the upper part of the connecting pipe (8) is connected with the gas output control box (5) and the lower part is connected with the mixer (9), the front end of the connecting pipe (8) is gradually reduced to form a fine circular nozzle (903) structure for slowing down the gas flow rate and increasing the pressure of output gas.

6. The non-pressure-storage suspension type compressed air foam fire extinguishing device according to claim 5, wherein a circular inner nozzle (903) is arranged in the middle of the mixer (9), the circular inner nozzle (903) is gradually reduced from the inside to the front end to form a circular nozzle for reducing the gas flow rate and increasing the pressure of output gas; a plurality of ventilation and transfusion holes (901) are distributed on the circumference of the upper circular inner nozzle (903) of the flow mixer (9), a whole is formed by a middle cross fixed beam and a flow mixing cavity (904), and a fine screen (905) is arranged at the lower outlet; the compressed gas and the foam premix are continuously pressurized and mixed through a circular inner nozzle (903) and a mixed flow cavity (904) in the mixer (9), and then are impacted to a fine screen (905) at the lower part at high speed and high pressure to be expanded to form the primary compressed air foam.

7. The non-pressure-storage suspension type compressed air foam fire extinguishing device according to claim 6, wherein in the foam premix storage cabin, during the high-speed spraying of the compressed gas through the connecting pipe (8) and the mixer (9), due to the change of the aperture, negative pressure is formed at the cross-shaped fixed beam, under the action of the negative pressure, the foam premix is passively sucked into the mixer (9) through the ventilation and transfusion hole (901), and the mixture formed by the foam premix and the compressed gas passes through the fine screen (905) at the lower part of the mixing nozzle at high speed, so that further compressed air foam is formed;

the cycle is not completed until all of the liquid is ejected.

8. Non-pressure-storage suspension type compressed air foam fire extinguishing device according to claim 1, characterized in that the control actuator (11) is an automatic control valve; after receiving the start signal, the primary compressed air foam generated by the mixer (9) is opened and sprayed to the special sprayer (12) through the channel inside the control starter (11).

9. The non-pressure-storing suspended compressed air foam fire-extinguishing device of claim 8, wherein the dedicated injector (12) comprises a nozzle (1202), a suction structure (1201), a negative pressure chamber (1203), a pressurized throat section (1204), a jet horn (1205), a coarse screen (1206), wherein:

after passing through the lower port of the control starter (11), the compressed air foam liquid enters a nozzle (1202) after the caliber is suddenly reduced, then enters a pressurizing throat section (1204), negative pressure is formed between the compressed air foam liquid and the pressurizing throat section, external air is sucked through a negative pressure cabin (1203), so that foam with larger air-liquid ratio is formed, and after a horn mouth (1205) and a coarse screen (1206) are sprayed, final compressed air foam is formed, and fire extinguishing is implemented by spraying outwards.