A portable pneumatic foam generator

Abstract

This invention discloses a portable pneumatic foam generator in the field of fire rescue equipment technology, comprising a main cylinder, an air inlet plate, and a discharge end cap. The air inlet plate is provided with a wind-driven groove and a wind-driven component inside it. Multiple air vents are evenly arranged on the side wall of the wind-driven groove and communicate with a gas dispersion structure inside the main cylinder. A foaming liquid dispersion structure is provided in front of the gas dispersion structure and is connected to a foaming liquid inlet pipe. A two-stage foaming component is provided in the front section inside the main cylinder, and a foam rotary cutting component is provided inside the discharge end cap. The rear end of the foam rotary cutting component is correspondingly connected to the wind-driven component. This invention achieves uniform gas-liquid mixing, fine foam particle size, and high foaming ratio through multi-stage foaming processes of gas dispersion, foaming liquid dispersion, two-stage foaming, and rotary cutting. Furthermore, all functional units are highly integrated inside the main cylinder, resulting in a small size that is easy to carry and deploy quickly.

Description

Technical Field

[0001] This invention relates to the field of fire rescue equipment technology, specifically a portable pneumatic foam generator. Background Technology

[0002] Foam extinguishing agents, with their excellent properties such as suffocation and heat radiation insulation, have been widely used in fire fighting, dust suppression, and decontamination operations. In outdoor disaster relief and emergency response, the need for portable, rapidly deployable foam generators is particularly urgent.

[0003] In the prior art, a portable compressed air foam generator with authorization announcement number CN212941075U uses compressed air directly introduced into the foam liquid in the fire tank to generate foam by utilizing the violent agitation of high-pressure gas in the liquid.

[0004] The aforementioned foam generator has a simple and compact structure and good overall mobility; however, the compressed air is directly foamed after only one simple stirring, resulting in limited gas-liquid mixing, uneven foam particle size, and a low foaming ratio. This makes it difficult to ensure the stability of foam quality under continuous spraying conditions, ultimately weakening the fire extinguishing or sealing effect.

[0005] Based on this, the present invention designs a portable pneumatic foam generator to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a portable pneumatic foam generator to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A portable pneumatic foam generator includes a main cylinder, an air inlet plate installed at the rear end of the main cylinder, and a discharge end cap installed at the front end of the main cylinder. A foam liquid inlet pipe is provided at the rear side wall of the main cylinder, an air inlet pipe is provided at the center of the rear end of the air inlet plate, and a discharge pipe is provided at the center of the front end of the discharge end cap, and the discharge pipe is connected to a spray gun. The front side of the air intake end plate is provided with a wind drive groove in the middle, and the wind drive groove is provided with a wind drive component. Multiple air vents are evenly provided on the side wall of the wind drive groove along the circumferential direction. The rear section of the main cylinder is equipped with a gas dispersion structure, which is connected to multiple air outlets. A foaming liquid dispersion structure is located in front of the gas dispersion structure, which is connected to the foaming liquid inlet pipe. Two-stage foaming components are located in the front section of the main cylinder. The discharge end cap is hemispherical, the discharge pipe is connected to the center of the sphere, and a foaming chamber is provided at the rear center of the discharge end cap. A foam rotary cutting component is provided in the foaming chamber, and the rear end of the foam rotary cutting component passes through the two-stage foaming component and is connected to the wind-driven component.

[0008] Preferably, the wind-driven assembly includes a speed control box installed inside the front end of the wind-driven slot. A wind-driven shaft is rotatably connected to the rear center of the speed control box, and drive fan blades are uniformly fixed on the wind-driven shaft along the circumferential direction. The front end of the wind-driven shaft extends into the speed control box and is fixed with a first gear. A second gear meshes with one side of the first gear. The second gear is rotatably connected inside the speed control box and is coaxially fixed with a third gear. The third gear is correspondingly connected to the foam rotary cutting assembly.

[0009] Preferably, the foam rotary cutting assembly includes a rotating shaft rotatably connected to the center of the front end of the speed control box. The rear end of the rotating shaft extends into the speed control box and is fixed with a fourth gear, which meshes with a third gear. The front end of the rotating shaft passes through the two-stage foaming assembly and extends into the foaming cavity of the discharge end cover. Multiple foam cutting blades are uniformly fixed on the extended end along both the axial and circumferential directions.

[0010] Preferably, a support cylinder is provided in the foaming cavity at the position corresponding to the rotating shaft, the front end of the rotating shaft is rotatably connected to the support cylinder, and multiple support frames are uniformly fixed in the circumferential direction between the outer wall of the support cylinder and the inner wall of the foaming cavity.

[0011] Preferably, the two-stage foaming assembly includes an annular guide platform fixed inside the front section of the main cylinder. A cylindrical first foaming net is fixed at the middle of the rear end of the guide platform. The rear end of the first foaming net contacts the front end of the speed control box. The rear side of the guide platform is set as a conical surface corresponding to the outer area of ​​the first foaming net and is inclined to the center of the front side of the guide platform. A planar second foaming net is fixed at the center of the guide platform. A rotating shaft passes through the first foaming net and is rotatably connected to the center of the second foaming net.

[0012] Preferably, the gas dispersion structure includes an annular sealing platform fixed to the rear section of the main cylinder, the outer wall of the wind-driven groove is in contact with the inner wall of the replacement sealing platform, and an airflow channel is provided in the sealing ring platform corresponding to each air outlet position, one end of the airflow channel is connected to the air outlet, and the other end faces the front.

[0013] Preferably, the foam liquid dispersion structure includes an annular tube fixed to the outer wall of the main cylinder, and the annular tube is connected and fixed to the foam liquid inlet pipe. Multiple liquid inlets are uniformly fixed on the inner side of the annular tube along the circumferential direction. The inner end of the liquid inlet extends into the interior of the main cylinder and is located in front of the corresponding airflow channel.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention employs a multi-stage foaming process that combines gas dispersion, liquid dispersion, two-stage foaming, and rotary cutting, resulting in thorough gas-liquid mixing, fine and uniform foam particle size, and significantly improved fire extinguishing and covering effects. 2. The wind-driven, gas dispersion, liquid dispersion, two-stage foaming and rotary cutting functions of this invention are highly integrated inside the main cylinder and the end caps. The overall structure is compact, small in size, easy to carry and quick to deploy. 3. This invention utilizes compressed air entering the device to drive the component to rotate simultaneously with wind power, eliminating the need for additional power sources such as motors, thus achieving multiple uses of energy and reducing the overall energy consumption and manufacturing cost of the device. 4. The foam liquid of the present invention is uniformly injected into a uniform flow channel after gas dispersion, and after being initially sheared by a two-stage foaming component, it is further refined at high speed by a foam rotary cutting component. The final foam has good adaptability in complex working conditions such as fire extinguishing, decontamination and dust suppression. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the external structure of the device of the present invention; Figure 2 This is a schematic diagram of the internal structure of the device of the present invention; Figure 3 for Figure 2 Schematic diagram of the structure at point A in the middle; Figure 4 This is a schematic diagram of the structure of the discharge end cap of the present invention; Figure 5 This is a schematic diagram of the internal structure of the speed control box of the present invention.

[0017] The attached diagram lists the components represented by each number as follows: 100-Main cylinder, 101-Guide platform, 102-First foaming net, 103-Second foaming net, 104-Annular sealing platform, 105-Airflow channel; 200-Inlet end plate, 201-Inlet pipe, 202-Wind drive slot; 300 - Foam liquid inlet pipe, 301 - Ring pipe, 302 - Liquid inlet port; 400 - Discharge end cap, 401 - Discharge pipe, 402 - Foaming chamber, 403 - Support frame; 500-Speed ​​control box, 501-Wind power drive shaft, 502-Drive fan blade, 503-First gear, 504-Second gear, 505-Third gear; 600 - Rotating shaft, 601 - Foaming cutting blade, 602 - Fourth gear. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1 Please refer to the accompanying drawings. This invention provides a technical solution: A portable pneumatic foam generator includes a main cylinder 100, an air inlet end plate 200 installed at the rear end of the main cylinder 100, and a discharge end cap 400 installed at the front end of the main cylinder 100. A foam liquid inlet pipe 300 is provided at the rear side wall of the main cylinder 100, an air inlet pipe 201 is provided at the center of the rear end of the air inlet end plate 200, and a discharge pipe 401 is provided at the center of the front end of the discharge end cap 400, and the discharge pipe 401 is connected to a spray gun. The front side of the air intake end plate 200 is provided with a wind drive groove 202, and a wind drive component is provided in the wind drive groove 202. Multiple air outlets are evenly provided on the side wall of the wind drive groove 202 along the circumferential direction. The rear section of the main cylinder 100 is provided with a gas dispersion structure, which is connected to multiple air outlets. The front side of the gas dispersion structure is provided with a foaming liquid dispersion structure, which is connected to the foaming liquid inlet pipe 300. The front section of the main cylinder 100 is provided with a two-stage foaming component. The discharge end cap 400 is hemispherical, the discharge pipe 401 is connected to the center of the sphere, and a foaming cavity 402 is provided at the rear center of the discharge end cap 400. A foam rotating cutting component is provided in the foaming cavity 402, and the rear end of the foam rotating cutting component passes through the two-stage foaming component and is correspondingly connected to the wind-driven component.

[0020] When the device is working, compressed air enters the rear side of the inlet end plate 200 from the inlet pipe 201, and first enters the wind drive slot 202, which drives the wind drive component to rotate, providing mechanical power for subsequent foam cutting and mixing; at the same time, the airflow enters the gas dispersion structure on the rear side of the main cylinder 100 through multiple air vents evenly distributed on the side wall of the slot, so that the gas is evenly distributed in the cross section, avoiding local airflow concentration, and creating stable conditions for gas-liquid mixing.

[0021] The foam liquid enters the foaming liquid dispersion structure through the foam liquid inlet pipe 300. Under the action of the structure, it is evenly dispersed into the gas flow channel and initially contacts the uniform airflow to form a gas-liquid mixture. The mixture enters the two-stage foaming component and is disturbed and sheared by the two-stage structure in sequence to initially generate fine foam.

[0022] Foam enters the foaming chamber 402 inside the hemispherical discharge end cap 400. The foam rotating cutting component inside the chamber rotates at high speed under the drive of the wind-driven component, which cuts, mixes and refines the foam again. Finally, the foam is output to the spray gun through the discharge pipe 401 to complete the high-efficiency foaming.

[0023] This device employs a multi-stage processing flow of gas dispersion, liquid dispersion, two-stage foaming, and rotary cutting, ensuring thorough gas-liquid mixing and producing small, uniform foam particles for better fire extinguishing or covering effects. Furthermore, the functions of wind-driven operation, gas dispersion, liquid dispersion, two-stage foaming, and rotary cutting are all integrated inside the main cylinder 100 and the end caps, making it compact, portable, and quick to deploy. It is suitable for portable operational scenarios requiring rapid generation of high-quality foam, such as fire fighting, decontamination, and dust suppression.

[0024] The wind-driven assembly includes a speed control box 500 installed inside the front end of the wind-driven trough 202. A wind-driven shaft 501 is rotatably connected to the rear center of the speed control box 500. Drive blades 502 are evenly fixed on the wind-driven shaft 501 along the circumferential direction. The front end of the wind-driven shaft 501 extends into the speed control box 500 and is fixed with a first gear 503. A second gear 504 meshes with one side of the first gear 503. The second gear 504 is rotatably connected inside the speed control box 500 and is coaxially fixed with a third gear 505. The third gear 505 is correspondingly connected to the foam rotary cutting assembly.

[0025] Compressed air enters the wind drive slot 202 through the air inlet pipe 201. The airflow is evenly blown along the circumference towards multiple drive blades 502, driving the blades and the wind drive shaft 501 fixed thereto to rotate. The power is transmitted to the foam rotary cutting component through the first gear 503, the second gear 504 and the third gear 505 in the speed control box 500, so that it rotates at high speed in the foaming chamber 402 to cut and refine the foam. The output speed and torque can be changed by using gear combinations with different gear ratios to achieve speed adjustment of the rotary cutting component.

[0026] The foam rotary cutting assembly includes a rotating shaft 600 rotatably connected to the center of the front end of the speed control box 500. The rear end of the rotating shaft 600 extends into the speed control box 500 and is fixed with a fourth gear 602. The fourth gear 602 meshes with a third gear 505. The front end of the rotating shaft 600 passes through the two-stage foaming assembly and extends into the foaming cavity 402 of the discharge end cover 400. At the same time, multiple foam cutting blades 601 are uniformly fixed on the extended end along the axial and circumferential directions.

[0027] The rotational power is transmitted to the rotating shaft 600 through the meshing of the third gear 505 and the fourth gear 602 in the wind-driven component. When the rotating shaft 600 rotates at high speed, the foam cutting blades 601 perform high-speed shearing, stirring and mixing on the initially formed foam in the foaming chamber 402, breaking large bubbles into small and uniform foam, thus helping to improve the foaming effect. Among them, multiple cutting blades are evenly arranged along the axial and circumferential directions to form a three-dimensional cutting mesh. The foam is subjected to multi-angle and high-frequency shearing in the foaming chamber 402, which significantly reduces the foam particle size and improves the uniformity and stability of the foam.

[0028] The two-stage foaming assembly includes an annular guide platform 101 fixed inside the front section of the main cylinder 100. A cylindrical first foaming net 102 is fixed at the middle of the rear end of the guide platform 101. The rear end of the first foaming net 102 contacts the front end of the speed control box 500. The rear side of the guide platform 101 is set as a conical surface corresponding to the outer area of ​​the first foaming net 102 and is inclined to the center of the front side of the guide platform 101. A planar second foaming net 103 is fixed at the center of the guide platform 101. A rotating shaft 600 passes through the first foaming net 102 and is rotatably connected to the center of the second foaming net 103.

[0029] The gas-liquid mixture first enters the first foaming net 102. As the mixture passes through the mesh, it is cut and dispersed to form finer foam, which gradually converges towards the center and flows to the second foaming net 103. When the foam passes through the second foaming net 103, it is sheared and refined again. The gas-liquid mixture is cut twice by the cylindrical net and the planar net in sequence, and the foam particle size decreases step by step, which significantly improves uniformity and stability, which is beneficial for fire extinguishing or covering operations.

[0030] Example 2 The structure of this embodiment is basically the same as that of Embodiment 1. The difference is that the gas dispersion structure includes an annular sealing platform 104 fixed to the rear section of the main cylinder 100. The outer wall of the wind-driven groove 202 is in contact with the inner wall of the replacement sealing platform 104. An airflow channel 105 is provided in the sealing ring platform 104 corresponding to each air outlet. One end of the airflow channel 105 is connected to the air outlet, and the other end faces the front, so that the gas input by the air inlet pipe 201 enters the corresponding airflow channel 105 along the air outlet and is dispersed and transported into the main cylinder 100.

[0031] The foam liquid dispersion structure includes an annular tube 301 fixed to the outer wall of the main cylinder 100, and the annular tube 301 is connected and fixed to the foam liquid inlet pipe 300. Multiple liquid inlet ports 302 are uniformly fixed on the inner side of the annular tube 301 along the circumferential direction. The inner end of the liquid inlet port 302 extends into the interior of the main cylinder 100 and is located in front of the corresponding airflow channel 105. The foam liquid is dispersed into the interior of the main cylinder 100 through the annular tube 301 and the multiple liquid outlet ports 302 so as to mix with the gas.

[0032] Example 3 The structure of this embodiment is basically the same as that of embodiment one. The difference is that a support cylinder is provided in the foaming cavity 402 at the position corresponding to the rotating shaft 600. The front end of the rotating shaft 600 is rotatably connected to the support cylinder. Multiple support frames 403 are uniformly fixed in the circumferential direction between the outer wall of the support cylinder and the inner wall of the foaming cavity 402. The support frames 403 and the support cylinder provide support and limit the front end of the rotating shaft 600, thereby improving its positional stability during rotation.

[0033] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A portable pneumatic foam generator, comprising a main cylinder (100), an air inlet plate (200) installed at the rear end of the main cylinder (100), and a discharge end cap (400) installed at the front end of the main cylinder (100), wherein a foam liquid inlet pipe (300) is provided at the rear side wall of the main cylinder (100), an air inlet pipe (201) is provided at the center of the rear end of the air inlet plate (200), and a discharge pipe (401) is provided at the center of the front end of the discharge end cap (400), and the discharge pipe (401) is connected to a spray gun, characterized in that: The front side of the air intake end plate (200) is provided with a wind drive groove (202), and a wind drive component is provided in the wind drive groove (202). Multiple air outlets are evenly provided on the side wall of the wind drive groove (202) along the circumferential direction. The rear section of the main cylinder (100) is provided with a gas dispersion structure, which is connected to multiple air outlets. The front side of the gas dispersion structure is provided with a foaming liquid dispersion structure, which is connected to the foaming liquid inlet pipe (300). The front section of the main cylinder (100) is provided with a two-stage foaming assembly. The discharge end cap (400) is hemispherical, the discharge pipe (401) is connected to the center of the sphere, and a foaming cavity (402) is provided at the rear center of the discharge end cap (400). A foam rotating cutting component is provided in the foaming cavity (402), and the rear end of the foam rotating cutting component passes through the two-stage foaming component and is correspondingly connected to the wind-driven component.

2. The portable pneumatic foam generator according to claim 1, characterized in that: The wind-driven assembly includes a speed control box (500) installed inside the front end of the wind-driven groove (202). A wind-driven shaft (501) is rotatably connected to the rear center of the speed control box (500), and drive fan blades (502) are evenly fixed on the wind-driven shaft (501) along the circumferential direction. The front end of the wind-driven shaft (501) extends into the speed control box (500) and is fixed with a first gear (503). A second gear (504) meshes with one side of the first gear (503). The second gear (504) is rotatably connected inside the speed control box (500) and is coaxially fixed with a third gear (505). The third gear (505) is correspondingly connected to the foam rotary cutting assembly.

3. The portable pneumatic foam generator according to claim 2, characterized in that: The foam rotary cutting assembly includes a rotating shaft (600) rotatably connected to the center of the front end of the speed control box (500). The rear end of the rotating shaft (600) extends into the speed control box (500) and is fixed with a fourth gear (602). The fourth gear (602) meshes with a third gear (505). The front end of the rotating shaft (600) passes through the two-stage foaming assembly and extends into the foaming cavity (402) of the discharge end cover (400). Multiple foam cutting blades (601) are uniformly fixed on the extended end along the axial and circumferential directions.

4. The portable pneumatic foam generator according to claim 3, characterized in that: The foaming cavity (402) is provided with a support cylinder at the position corresponding to the rotating shaft (600). The front end of the rotating shaft (600) is rotatably connected to the support cylinder, and multiple support frames (403) are uniformly fixed in the circumferential direction between the outer wall of the support cylinder and the inner wall of the foaming cavity (402).

5. The portable pneumatic foam generator according to claim 3, characterized in that: The two-stage foaming assembly includes an annular guide platform (101) fixed inside the front section of the main cylinder (100). A cylindrical first foaming net (102) is fixed in the middle of the rear end of the guide platform (101). The rear end of the first foaming net (102) contacts the front end of the speed control box (500). The rear side of the guide platform (101) is set as a conical surface corresponding to the outer area of ​​the first foaming net (102) and is inclined to the center of the front side of the guide platform (101). A planar second foaming net (103) is fixed at the center of the guide platform (101). The rotating shaft (600) passes through the first foaming net (102) and is rotatably connected to the center of the second foaming net (103).

6. The portable pneumatic foam generator according to claim 1, characterized in that: The gas dispersion structure includes an annular sealing platform (104) fixed to the rear section of the main cylinder (100). The outer wall of the wind-driven groove (202) is in contact with the inner wall of the annular sealing platform (104). An airflow channel (105) is provided in the annular sealing platform (104) corresponding to each air outlet. One end of the airflow channel (105) is connected to the air outlet, and the other end faces the front.

7. The portable pneumatic foam generator according to claim 1, characterized in that: The foam liquid dispersion structure includes an annular tube (301) fixed to the outer wall of the main cylinder (100), and the annular tube (301) is connected and fixed to the foam liquid inlet pipe (300). Multiple liquid inlet ports (302) are uniformly fixed on the inner side of the annular tube (301) along the circumferential direction. The inner end of the liquid inlet port (302) extends into the main cylinder (100) and is located in front of the corresponding airflow channel (105).

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