Portable fire extinguishing device

Abstract

The utility model relates to a portable fire extinguishing device which comprises a container body for containing fire extinguishing liquid and a spraying device, the spraying device is communicated with the container body to spray out the fire extinguishing liquid, the spraying device comprises a shell, a water pump, an air pump and a mixing cavity, the water pump is respectively communicated with the mixing cavity and the container body, and the air pump is communicated with the mixing cavity. The shell is provided with a spray head, the mixing cavity is communicated with the outside through the spray head, and a spraying cavity where liquid and air are introduced and mixed through the water pump and the air pump is formed. By means of the device, the size and the mass of the device are reduced, the stability of fire extinguishing agent foam and a foaming agent is improved, and fire extinguishing media can be flexibly switched according to scenes.

Description

Technical Field

[0001] This utility model relates to the field of fire-fighting equipment, and in particular to a portable fire extinguishing device. Background Technology

[0002] Currently, common fire extinguishers typically use metal cylinders filled with high-pressure gas, which is then used to release the extinguishing agent. Foam fire extinguishers primarily use a mixture of gas and foam liquid to generate foam. After being released, the foam covers the surface of the burning material, cutting off the contact between the fire source and the air to extinguish the fire. However, the use of steel cylinders results in a large weight of the equipment, which is not conducive to moving or operating it, or to extinguishing fires in confined spaces. At the same time, the premixed foam liquid in foam fire extinguishers can lose its surfactants during storage due to the effect of electrolytes in the water, reducing the lifespan of the fire extinguisher. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model discloses a portable fire extinguishing device, which includes a container body containing fire extinguishing liquid and a discharge device. The discharge device is connected to the container body to spray out the fire extinguishing liquid. The discharge device includes a shell and a water pump, an air pump and a mixing chamber installed in the shell. The water pump is connected to the mixing chamber and the container body respectively, and the air pump is connected to the mixing chamber. A nozzle is provided on the shell. The mixing chamber is connected to the outside through the nozzle, forming a discharge chamber in which the water pump and air pump introduce and mix the liquid and air.

[0004] Specifically, the container body is divided into a first cavity and a second cavity. The container body is equipped with a liquid collection pipe, which is in the shape of a three-way connector. One end of the pipe is connected to the first cavity and the second cavity respectively, and the other end is connected to a water pump, forming a mixed liquid inlet passage through which the water pump can jointly draw liquid from the first cavity and the second cavity.

[0005] Specifically, the second chamber is isolated from the first chamber to form two non-interconnected double chambers. The second chamber has a passage that connects to the external atmosphere of the container body, and a valve is provided on the outer wall of the container body to open or close the passage.

[0006] Specifically, the bottom of the second cavity is higher than the bottom of the first cavity, and the bottom of the second cavity has an opening that is connected to the manifold via a pipe. The port of the internal passage of the second cavity is set higher than the opening.

[0007] Specifically, it also includes a first suction tube connecting the first cavity and the manifold, and a second suction tube connecting the second cavity and the manifold. The first suction tube extends straight to the bottom of the first cavity, and the diameter of the second suction tube is 1 / 3 to 1 / 2 of the diameter of the first suction tube. The angle between the first suction tube and the second suction tube on the manifold is 15° to 45°.

[0008] Specifically, the mixing chamber includes an injection port, a mixing chamber, a gas-liquid mixing chamber, and an outlet connected in sequence. One end of the injection port is connected to a water pump, and the other end is connected to the mixing chamber. The two ends of the gas-liquid mixing chamber are connected to the mixing chamber and the outlet, respectively, forming a liquid passage inside. The gas-liquid mixing chamber is provided with an air inlet connected to an air pump. The air inlet has an angle with the direction of the liquid passage, forming a gas-liquid confluence and fusion part.

[0009] Specifically, the inner diameter of the injection port gradually decreases towards the mixing chamber, forming a tapered opening, and the inner diameter of the gas-liquid mixing chamber is larger than that of the injection port and the mixing chamber, forming a stepped structure.

[0010] Specifically, the spray device also includes an atomizing cap, the nozzle is connected to the outlet, the atomizing cap has a through hole and is set on the nozzle, and there is a gap between the atomizing cap and the nozzle to form an atomizing chamber.

[0011] Specifically, both the inner wall of the atomizing cap and the outer surface of the nozzle are threaded, and the atomizing cap is installed on the nozzle in an adjustable manner via the threads.

[0012] Advantages and effects

[0013] By connecting the air pump to the atmosphere, the container body contains only liquid extinguishing agent, reducing the size and weight of the device; the mixing chamber mixes water, foaming agent, and gas, improving the stability of the extinguishing agent foam; the first and second chambers separate water and foaming agent during storage, reducing damage to the surfactants in the foaming agent; the valve body and atomizing chamber allow for flexible switching of extinguishing media according to the scenario within the same device, and provide good breaking atomization effect when spraying water-based extinguishing agents. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the spray device of this utility model.

[0016] Legend: 1. Container body; 11. First cavity; 12. Second cavity; 13. Valve body; 2. Discharge device; 21. Shell; 22. Water pump; 23. Air pump; 24. Mixing chamber; 241. Injection port; 242. Mixing chamber; 243. Gas-liquid mixing chamber; 244. Outlet; 25. Nozzle; 26. Atomizing cap; 3. Liquid collection pipe; 4. First suction pipe; 5. Second suction pipe. Detailed Implementation

[0017] The present invention will be further described below with reference to embodiments, but is not limited to the contents of the specification.

[0018] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0019] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of this utility model.

[0020] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0021] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".

[0022] like Figure 1 , Figure 2As shown, this utility model relates to a portable fire extinguishing device, which includes a container body 1 containing fire extinguishing liquid and a discharge device 2. The discharge device 2 is connected to the container body 1 to spray out the fire extinguishing liquid. The discharge device 2 includes a housing 21 and a water pump 22, an air pump 23, and a mixing chamber 24 disposed within the housing 21. The water pump 22 is connected to the mixing chamber 24 and the container body 1, and the air pump 23 is connected to the mixing chamber 24. A nozzle 25 is provided on the housing 21, and the mixing chamber 24 is connected to the outside through the nozzle 25, forming a discharge chamber in which the water pump 22 and the air pump 23 introduce and mix the liquid and air. Since it is not necessary to store high-pressure gas, the container body 1 can be made of lightweight PC or PET material. The discharge device 2 is located at the bottle mouth at the end of the container body 1 and is connected to it. Water pump 22 and air pump 23 are connected in parallel and connected to a power supply device, such as a battery installed in the housing 21 to drive water pump 22 and air pump 23. The air pump 23's air inlet is connected to the atmosphere outside the housing 21, and its air outlet is connected to the mixing chamber 24. The mixing chamber 24 is located at the end of the discharge device 2. When water pump 22 draws the extinguishing agent into the mixing chamber 24, air pump 23 simultaneously pumps high-speed gas into the mixing chamber 24 to mix the gas and liquid. If the extinguishing agent is a water-based extinguishing agent, it collides with the air in the mixing chamber 24, breaks up, and atomizes to form droplets. After being sprayed, the extinguishing agent is evenly distributed and covers a large area, improving the extinguishing efficiency. If the extinguishing agent is a foam extinguishing agent, when the extinguishing agent enters the mixing chamber 24, it mixes with the air to generate foam. At the same time, the air pump accelerates and pressurizes the extinguishing agent to make it spray out quickly to extinguish the fire.

[0023] like Figure 1 As shown, the container body 1 is divided into a first cavity 11 and a second cavity 12. The container body 1 is provided with a liquid collection pipe 3, which is a three-way pipe with its two ends connected to the first cavity 11 and the second cavity 12 respectively, and one end connected to a water pump 22, forming a mixing inlet channel for the water pump to jointly draw liquid from the first cavity 11 and the second cavity 12. Existing foam fire extinguishers premix the foaming agent and water before canistering, but after a long storage time, the surface active ingredients of the foaming agent are easily destroyed by the electrolytes in the water, resulting in a reduction in foaming volume and duration. Therefore, the container body 1 is divided into two cavities to store water and foaming agent respectively. The liquid collection pipe 3 is a three-way pipe installed in the container body 1. The water pump 22 connects to the liquid collection pipe 3 to draw liquid from the first cavity 11 and the second cavity 12 into the liquid collection pipe 3, and further into the mixing cavity 24.

[0024] Furthermore, the first chamber 11 is used to store water, and the second chamber 12 is used to store foaming agent or foam liquid and other components. The second chamber 12 and the first chamber 11 are isolated to form two non-interconnected double chambers. The second chamber 12 has a passage 121 that communicates with the outside atmosphere of the container body 1. A valve 13 is provided on the outer wall of the container body 1 to open or close the passage 121. The second chamber 12 can be a closed chamber set inside the first chamber 11 to prevent the foaming agent from coming into contact with water in advance. At the same time, the passage 121 and the valve 13 are opened at the top of the second chamber 12 for air intake or closure. When the second chamber 12 is filled with liquid, the valve 13 is closed to form a seal, which also reduces the influence of moisture, oxygen and other substances in the air on the foaming agent. When foam fire extinguishing is required in case of fire, the valve 13 is opened to connect the second chamber 12 with the outside atmosphere. The foaming agent is then pumped to the mixing chamber 24 by the water pump 22, mixed and sprayed out.

[0025] The bottom of the second chamber 12 is higher than the bottom of the first chamber 12, and the bottom of the second chamber 12 has an opening 122 that is connected to the manifold 3 through a pipeline. The port of the passage 121 inside the second chamber 12 is set higher than the opening 122. Since the second chamber 12 is used to store the foaming agent, raising the height of the second chamber 12 reduces the height difference when the water pump 22 extracts the foaming agent, and the natural gravity of the foaming agent seals the opening 122, reducing the entry of water and impurities from the container into the second chamber 12. After the valve body 13 is opened, the water pump 22 extracts the foaming agent in the second chamber 12 by siphoning when extracting water from the first chamber 12, which improves the delivery efficiency and makes the foaming agent flow rate uniform, and the foam uniformity is maintained after continuous spraying.

[0026] It also includes a first suction pipe 4 connecting the first cavity 11 and the manifold 3, and a second suction pipe 5 connecting the second cavity 12 and the manifold 3. The first suction pipe 4 extends straight to the bottom of the first cavity 11. The diameter of the second suction pipe 5 is 1 / 3 to 1 / 2 of the diameter of the first suction pipe 4. The angle between the first suction pipe 4 and the second suction pipe 5 on the manifold 3 is 15° to 45°. The straight pipe design reduces the resistance of the first suction pipe 4 when the water pump 23 is pumping water and improves the delivery efficiency, thereby reducing the diameter of the second suction pipe 5. The foaming agent in the second cavity 12 is sucked out by the negative pressure when pumping water. At the same time, the ratio of water to foaming agent can be adjusted by controlling the pipe diameter. The 15° to 45° intersection angle can smoothly suck in the foaming agent and reduce the interference of liquid impact on the suction.

[0027] like Figure 2As shown, the mixing chamber 24 includes an injection port 241, a mixing chamber 242, a gas-liquid mixing chamber 243, and an outlet 244 connected in sequence. One end of the injection port 241 is connected to the water pump 22, and the other end is connected to the mixing chamber 242. The two ends of the gas-liquid mixing chamber 243 are connected to the mixing chamber 242 and the outlet 244 respectively, forming a liquid passage inside. The gas-liquid mixing chamber 243 is provided with an air inlet connected to the air pump 23. The air inlet's air intake direction forms an angle with the liquid passage direction, creating a gas-liquid junction. Since the water pump 22 draws water and foaming agent, both flow in relatively narrow pipes, it is difficult to... To prevent uneven foaming caused by insufficient mixing, the mixture of water and foaming agent is pumped into the injection port 241. The two first enter the mixing chamber 242, where they collide with and dissolve against the inner wall of the mixing chamber 242, allowing the water and foaming agent to undergo preliminary mixing. After being further introduced into the gas-liquid mixing chamber 243, the mixture is then mixed by the high-pressure gas ejected by the air pump 23 at the junction, where it collides with each other and generates a large number of bubbles under the action of the surfactant in the foaming agent. At the same time, the water pump 22 and the air pump 23 simultaneously pressurize the mixing chamber 24, causing the foam to be rapidly ejected from the outlet 244.

[0028] Furthermore, the inner diameter of the injection port 241 gradually decreases towards the mixing chamber 242, forming a tapered opening, which accelerates the pumping of the mixed liquid into the mixing chamber 242. The inner diameter of the gas-liquid mixing chamber 243 is larger than that of the injection port 241 and the mixing chamber 242, forming a stepped structure. The enlarged gas-liquid mixing chamber 243 ensures that the extinguishing agent is fully mixed and generates sufficient foam, further improving the uniformity of the extinguishing agent foam.

[0029] In another embodiment, the fire extinguishing device can extinguish fires by only discharging water-based extinguishing agent. When the valve 13 on the container is closed, the discharge device is activated. Since the second chamber 12 cannot be connected to the atmosphere, the foaming agent inside cannot be extracted by the negative pressure of the water pump and the siphon effect of the water flow. Therefore, the water pump only pumps the water in the first chamber 11 into the mixing chamber 24. At the same time, the water flow accelerates into the gas-liquid mixing chamber 243 through the injection port 241. Since there is no foaming agent, the water flow collides with the gas discharged by the gas pump 23 and breaks into droplets by colliding with the inner wall of the gas-liquid mixing chamber 243. The atomized water-based extinguishing agent is then sprayed out from the outlet 244 through the nozzle 25.

[0030] Furthermore, the discharge device 2 also includes an atomizing cap 26, the nozzle 25 is connected to the outlet 244, the atomizing cap 26 has a through hole and is set on the nozzle 25, and there is a gap between the atomizing cap 26 and the nozzle 25 to form an atomizing chamber. When using water-based fire extinguishing agent, a small atomizing chamber is set at the discharge end of the discharge device 2 to further break up and atomize the liquid, improve the atomization uniformity, and pressurize the fire extinguishing agent to increase the discharge speed and discharge distance.

[0031] Both the inner wall of the atomizing cap 26 and the outer surface of the nozzle 25 are threaded. The atomizing cap 26 is installed on the nozzle 25 in an adjustable manner via the thread. The adjustable atomizing cap 26 allows the fire extinguishing device to perform two spray operations. When the valve body 13 is opened, the second chamber 12 is connected to the atmosphere, allowing the foaming agent to mix with water and spray out fire extinguishing foam. The atomizing cap 26 is adjusted to reduce the volume of the atomizing chamber, allowing the foam to be sprayed directly from the outlet 244 to the end of the nozzle 25 for fire extinguishing. When the valve body 13 is closed, only water is introduced into the gas-liquid mixing chamber 243 and atomized by collision. The atomizing cap 26 is adjusted to increase the volume of the atomizing chamber, and the threads inside the atomizing cap 26 cause the liquid to be centrifugally accelerated. After spraying, the uniformity of the droplets and the spray distance are further increased, improving the fire extinguishing efficiency.

[0032] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the embodiments of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is impossible to exhaustively list all embodiments here. All obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A portable fire extinguishing device, characterized in that, It includes a container body (1) for containing fire extinguishing liquid and a discharge device (2). The discharge device (2) is connected to the container body (1) to discharge the fire extinguishing liquid. The discharge device (2) includes a shell (21) and a water pump (22), an air pump (23) and a mixing chamber (24) installed in the shell (21). The water pump (22) is connected to the mixing chamber (24) and the container body (1). The air pump (23) is connected to the mixing chamber (24). A nozzle (25) is provided on the shell (21). The mixing chamber (24) is connected to the outside through the nozzle (25) to form a discharge chamber in which the water pump (22) and the air pump (23) introduce and mix the liquid and air.

2. The portable fire extinguishing device according to claim 1, characterized in that, The container body (1) is divided into a first cavity (11) and a second cavity (12). The container body (1) is provided with a liquid collection pipe (3). The liquid collection pipe (3) is in the shape of a three-way connector, with its two ends connected to the first cavity (11) and the second cavity (12) respectively, and one end connected to a water pump (22), forming a mixed liquid inlet passage through which the water pump can jointly draw liquid from the first cavity (11) and the second cavity (12).

3. The portable fire extinguishing device according to claim 2, characterized in that, The second cavity (12) and the first cavity (11) are isolated to form two non-interconnected double chambers. The second cavity (12) has a passage (121) that communicates with the outside atmosphere of the container body (1). A valve (13) is provided on the outer wall of the container body (1) to open or close the passage (121).

4. The portable fire extinguishing device according to claim 3, characterized in that, The bottom of the second cavity (12) is higher than the bottom of the first cavity (11), and the bottom of the second cavity (12) has an opening (122) and is connected to the manifold (3) through a pipeline. The port of the passage (121) inside the second cavity (12) is set higher than the opening (122).

5. The portable fire extinguishing device according to claim 2, characterized in that, It also includes a first suction tube (4) connecting the first cavity (11) and the manifold (3), and a second suction tube (5) connecting the second cavity (12) and the manifold (3). The first suction tube (4) extends straight to the bottom of the first cavity (11), and the diameter of the second suction tube (5) is 1 / 3 to 1 / 2 of the diameter of the first suction tube (4). The included angle between the first suction tube (4) and the second suction tube (5) on the manifold (3) is 15° to 45°.

6. The portable fire extinguishing device according to claim 1, characterized in that, The mixing chamber (24) includes an injection port (241), a mixing chamber (242), a gas-liquid mixing chamber (243), and an outlet (244) connected in sequence. One end of the injection port (241) is connected to a water pump (22), and the other end is connected to the mixing chamber (242). The two ends of the gas-liquid mixing chamber (243) are connected to the mixing chamber (242) and the outlet (244) respectively, forming a liquid passage inside. The gas-liquid mixing chamber (243) is provided with an air inlet connected to an air pump (23). The air inlet has an angle with the direction of the liquid passage to form a gas-liquid junction.

7. The portable fire extinguishing device according to claim 6, characterized in that, The inner diameter of the injection port (241) gradually decreases towards the mixing chamber (242) to form a tapered opening, and the inner diameter of the gas-liquid mixing chamber (243) is larger than that of the injection port (241) and the mixing chamber (242) to form a stepped structure.

8. The portable fire extinguishing device according to any one of claims 6 or 7, characterized in that, The spraying device (2) also includes an atomizing cap (26), the nozzle (25) is connected to the outlet (244), the atomizing cap (26) has a through hole and is disposed on the nozzle (25), and there is a gap between the atomizing cap (26) and the nozzle (25) to form an atomizing chamber.

9. The portable fire extinguishing device according to claim 8, characterized in that, The inner wall of the atomizing cap (26) and the outer side of the nozzle (25) are both provided with threads, and the atomizing cap (26) is installed on the nozzle (25) in an adjustable manner through the threads.

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