A small high-efficiency foaming device

Abstract

This utility model relates to the field of foaming device technology and discloses a small, high-efficiency foaming device, comprising: a mixing chamber, a guiding unit, a foaming unit, and a launching unit connected in sequence. The mixing chamber shell is provided with an interface for high-expansion foam extinguishing agent to enter, and a spiral nozzle is provided at one end of the interface. The mixing chamber also has a guiding structure so that the foam can be transported by the spiral nozzle to the foaming unit, and then through the foaming unit to the launching unit for output. The foaming unit shell is also provided with multiple sets of foaming nets with progressively decreasing pore sizes. Through atomization by the spiral nozzle, mixing aid by the axial flow fan, and the three-stage gradually decreasing pore size elastic foaming net, a shear force can be applied to the entering extinguishing agent, resulting in foam with high expansion ratio, uniform and fine diameter, and good stability, which can more effectively cover the fire source, isolate oxygen, and improve fire extinguishing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of foaming device technology, specifically to a small and efficient foaming device. Background Technology

[0002] Foaming devices are suitable for fire fighting in functional areas, warehouses, and other places. Their function is to quickly foam the high-expansion foam extinguishing agent stored in the container into a foam body and spray it onto the protected area, using the covering and suffocating effect of the foam to extinguish the fire efficiently.

[0003] In traditional foaming devices, the mixing of compressed air and foaming extinguishing agent is often insufficient, resulting in foams with inconsistent diameters (large dispersion), poor stability, and low expansion ratios. This affects extinguishing efficiency because uneven and unstable foam cannot form a durable and effective protective layer.

[0004] Therefore, the applicant designed a small, high-efficiency foaming device to solve the above-mentioned technical problems. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a small and efficient foaming device to solve the problem of insufficient mixing of air and foaming extinguishing agent and low foaming ratio in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A small, high-efficiency foaming device includes: a mixing chamber, a guiding unit, a foaming unit, and a launching unit that are fixedly connected to each other in sequence. The mixing chamber shell is provided with an interface for allowing high-expansion foam extinguishing agent to enter, and a spiral nozzle is also provided at one end of the interface. The mixing chamber is also provided with a guiding structure so that the foam can be delivered from the spiral nozzle to the foaming unit, and then delivered from the foaming unit to the launching unit for output. The foaming unit shell is also provided with multiple sets of foaming nets with progressively smaller apertures. The high-expansion foam extinguishing agent is sprayed into the foaming unit in a solid cone shape through the spiral nozzle. The multiple sets of foaming nets shear and foam the spray to form high-expansion foam, which is then sprayed out into the launching unit.

[0007] Furthermore, the guide unit is hexagonal pyramidal, and a hexagonal pyramidal locator is provided along the port of the foaming unit and fixedly connected to the end port of the guide unit.

[0008] Furthermore, the guiding structure is an axial fan disposed inside the mixing chamber shell, with the airflow direction of the axial fan facing the spray ejected by the spiral nozzle, so that the spray enters the foaming unit.

[0009] Furthermore, the spray angle of the spiral nozzle is 120 degrees.

[0010] Furthermore, the spiral nozzle is a coreless design.

[0011] Furthermore, the pore walls of the foamed mesh are elastic.

[0012] Furthermore, the foaming net includes a first foaming net, a second foaming net, and a third foaming net arranged sequentially along the foam entry direction, wherein the pore size of the first foaming net is larger than that of the second foaming net, and the pore size of the second foaming net is larger than that of the third foaming net.

[0013] Furthermore, the launch unit housing also includes an obliquely arranged guide plate, and a concentrated flow guide shroud is provided below the guide outlet of the guide plate so that the foam is ejected from the concentrated flow guide shroud.

[0014] Furthermore, the centralized deflector is detachably connected to the launch unit.

[0015] Furthermore, a fixed bracket is provided on the outer wall of the housing of the launching unit.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. In this application, the atomization by spiral nozzles, the mixing aid by axial flow fans, and the elastic foaming net with three-stage gradually decreasing aperture can apply shear force to the incoming extinguishing agent, so that the foam with high foaming ratio, uniform and fine diameter and good stability can more effectively cover the fire source, isolate oxygen and improve the extinguishing efficiency. 2. The combination of the hexagonal pyramidal guide unit and the axial flow fan in this application can optimize the airflow and liquid flow paths in the mixing chamber and the foaming unit. This allows the atomized extinguishing agent to pass through the foaming net more evenly, reduces flow dead zones, and ensures that the foaming net material is fully utilized, thereby improving the overall foaming efficiency and consistency. 3. By setting a spiral nozzle with or without an inner core, the channel is expanded, the capacity to accommodate impurities is improved, and the risk of clogging is significantly reduced. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the exploded structure in this application; Figure 2This is a schematic diagram of the cross-sectional structure in this application; Figure 3 This is a top view of the foamed mesh structure. Figure 4 This is a schematic diagram of the three-dimensional structure of the foam mesh; Figure 5 This is a schematic diagram of the internal structure of the transmitting unit.

[0019] In the diagram: 1. Guiding unit; 11. Interface; 12. Spiral nozzle; 2. Mixing chamber; 21. Axial flow fan; 3. Launching unit; 31. Centralized flow guide shroud; 32. Guide plate; 33. Fixed bracket; 4. Foaming unit; 41. First foaming net; 42. Second foaming net; 43. Third foaming net. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] This utility model provides a technical solution: such as Figure 1-5 As shown, a small, high-efficiency foaming device comprises a mixing chamber 2, a guiding unit 1, a foaming unit 4, and a launching unit 3, which are sequentially and fixedly connected. The mixing chamber 2 has an interface 11 for the high-expansion foaming extinguishing agent to enter. A spiral nozzle 12 is connected through the output end of the interface 11. Multiple sets of foaming nets are arranged inside the shell of the foaming unit 4, with the aperture of the nets decreasing sequentially along the direction of foam entry. The solid cone-shaped spray from the spiral nozzle 12 enters the foaming nets for shearing and foaming to form high-expansion foam, which is then transported to the launching unit 3. To ensure the foam can smoothly enter the launching unit 3, a guiding structure is also provided in the mixing chamber 2, such as... Figure 2 As shown, the guiding structure allows the foam to travel along direction A from the mixing chamber 2 to the foaming unit 4, and finally to the firing unit 3 for ejection.

[0022] Furthermore, such as Figure 1 As shown, the guide unit 1 is a hexagonal pyramid shape. A hexagonal pyramid positioner is provided along the port of the foaming unit 4 and is fixedly connected to the end port of the guide unit 1. This is used to optimize the flow path of the atomized fire extinguishing agent, so that it passes through the foaming net evenly and improves the foaming efficiency.

[0023] Furthermore, such as Figure 1-2As shown, the guiding structure is an axial fan 21 installed in the mixing chamber 2. The airflow direction of the axial fan 21 is directly opposite to the spray ejected by the spiral nozzle 12, wherein the spray angle of the spiral nozzle 12 is set to 120 degrees.

[0024] Furthermore, such as Figure 2 As shown, the spiral nozzle 12 has a coreless design, which ensures the smooth flow of the channel and has the ability to accommodate large particles of impurities, significantly reducing the risk of blockage.

[0025] Furthermore, such as Figure 3-4 As shown, the pore walls of the foam mesh are designed to be elastic.

[0026] Furthermore, such as Figure 3-4 As shown, the foaming net further comprises a first foaming net 41, a second foaming net 42, and a third foaming net 43, wherein the pore size of the aforementioned foaming net gradually decreases along the direction B in which the foam enters.

[0027] In use, the high-expansion foaming extinguishing agent is input through interface 11. The extinguishing agent enters the spiral nozzle 12 through interface 11, mixes and sprays out to form a 120-degree conical spray into the foaming unit 4. The atomized extinguishing agent droplets are initially mixed with the airflow provided by the axial fan 21 in the mixing chamber 2, forming a gas-liquid two-phase flow. Then, the extinguishing agent passes through the primary shear of the first foaming net 41. When the fluid passes through the first layer of the larger aperture net 41, it is obstructed by the pore wall and generates turbulence, and the droplets are initially separated. Then, in the subsequent gradually smaller aperture layer, the fluid is forced through smaller channels. The elastic vibration of the pore wall and the change in pore size apply high-frequency shear force to the fluid, causing the liquid film to continuously thin and split into foam with a diameter of 1 to 10 mm, forming a high foaming ratio (500 to 800 times), which is then transported to the launching unit 3 for spraying, thus completing the formation and output of the high-expansion foaming extinguishing agent.

[0028] Furthermore, such as Figure 5 As shown, in order to concentrate the foam delivered to the launching unit 3, an inclined guide plate 32 is also provided in the launching unit 3. A concentrated flow guide hood 31 is provided below the guide outlet of the guide plate 32. The foam flows downward along the guide plate 32 in the C direction and is then sprayed out through the concentrated flow guide hood 31.

[0029] Furthermore, the centralized fairing 31 is detachably fixed to the launch unit 3.

[0030] Furthermore, such as Figure 5 As shown, the foaming device in this application weighs about 6KG. Therefore, a fixed bracket 33 is also fixedly connected to the surface of the shell of the launching unit 3. The foaming device is fixed to other instruments for cooperation through the fixed bracket 33.

[0031] It should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", and "rear" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing this application and simplifying the description, and 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. Therefore, it should not be construed as a limitation of this application.

[0032] The present invention provides a detailed description of a small, high-efficiency foaming device. Specific examples have been used to illustrate the principle and implementation of the present invention. The descriptions of these embodiments are merely illustrative and are intended to aid in understanding the method and core concept of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A small, high-efficiency foaming device, characterized in that, include: The mixing chamber (2), the guiding unit (1), the foaming unit (4) and the launching unit (3) are fixedly connected to each other in sequence. The mixing chamber (2) is provided with an interface (11) for high-expansion foam extinguishing agent to enter. A spiral nozzle (12) is also provided at one end of the interface (11). The mixing chamber (2) is also provided with a guiding structure so that the foam can be transported by the spiral nozzle (12) to the foaming unit (4), and then transported by the foaming unit (4) to the launching unit (3) for output; The housing of the foaming unit (4) is also provided with multiple sets of foaming nets with successively decreasing pore sizes. The high-expansion foam extinguishing agent is sprayed into the foaming unit (4) through the spiral nozzle (12) in a solid cone shape. The multiple sets of foaming nets shear and foam the spray to form high-expansion foam, which is then sprayed into the launching unit (3).

2. The small, high-efficiency foaming device according to claim 1, characterized in that: The guide unit (1) is hexagonal pyramidal, and a hexagonal pyramidal locator is provided along the port of the foaming unit (4) and fixedly connected to the end port of the guide unit (1).

3. The small, high-efficiency foaming device according to claim 1, characterized in that: The guiding structure is an axial fan (21) installed inside the mixing chamber (2) shell. The airflow direction of the axial fan (21) is directly opposite to the spray sprayed by the spiral nozzle (12) so that the spray enters the foaming unit (4).

4. The small, high-efficiency foaming device according to claim 2, characterized in that: The spray angle of the spiral nozzle (12) is 120 degrees.

5. The compact high-efficiency foaming device of claim 2, wherein: The spiral nozzle (12) is a coreless design.

6. The small, high-efficiency foaming device according to claim 1, characterized in that: The pore walls of the foamed mesh are elastic.

7. The compact high efficiency foaming device of claim 6, wherein: The foaming net includes a first foaming net (41), a second foaming net (42), and a third foaming net (43) arranged sequentially along the foam entry direction. The first foaming net (41) has a larger pore size than the second foaming net (42), and the second foaming net (42) has a larger pore size than the third foaming net (43).

8. The compact high efficiency foaming device of claim 1, wherein: The housing of the launching unit (3) also includes an obliquely arranged guide plate (32), and a concentrated flow guide shroud (31) is provided below the guide outlet of the guide plate (32) so that the foam is ejected from the concentrated flow guide shroud (31).

9. The compact high efficiency foaming device of claim 8, wherein: The central deflector (31) is detachably connected to the launch unit (3).

10. The small, high-efficiency foaming device according to claim 1, characterized in that: The outer wall of the housing of the transmitting unit (3) is provided with a fixed bracket (33).

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