A multi-connected variable foam generator

Abstract

The present invention discloses a multi-connected variable foam generator, which relates to the technical field of fire-fighting equipment. The key points of its technical solution are as follows: The foam generator includes a main body and a gun head. The main body has an inlet flow channel and an outlet flow channel that are connected. There are at least two gun heads, and the gun heads are all detachably connected to the main body and are all connected to the outlet flow channel. According to the actual scenario, an appropriate number of gun heads are assembled; the mixed liquid enters into multiple gun heads through the inlet flow channel and the outlet flow channel, and then is sprayed through the multiple gun heads. The mixed liquid produces foam through the multiple gun heads, which can effectively increase the foaming multiple of the mixed liquid, and at the same time also increases the spraying area of the foam, enabling the foam to quickly cover the object on fire.

Description

Technical Field

[0001] The present invention relates to the technical field of fire-fighting equipment, and particularly relates to a multi-connected variable foam generator. Background Art

[0002] Traditional elevated jet fire trucks are equipped with elevated boom (ladder) on the fire truck, and a foam gun or a water gun is installed at the top of the boom to achieve high-altitude spraying of fire extinguishing agents. The fire extinguishing agents are sprayed over the surface of the fire object at a long distance to block and cool the fire object, so as to achieve the purpose of extinguishing the fire.

[0003] However, the traditional fire-fighting foam gun has the following disadvantages: Most of the fire guns installed on the elevated jet fire truck are single-barrel fixed-magnification foam gun heads, and the foaming form and foaming multiple of the foam are single and cannot be adjusted; when the mixed liquid of water and foam is sprayed through the gun head, the mixed liquid is disordered and unstable, which greatly affects the foaming multiple and range of the foam. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a multi-connected variable foam generator, which has the advantage of being able to improve the foaming multiple.

[0005] The above technical purpose of the present invention is achieved through the following technical solutions: A multi-connected variable foam generator, the foam generator includes a body and a gun head, the body has an inlet flow channel and an outlet flow channel connected to each other, at least two gun heads are provided, the gun heads are all detachably connected to the body, and the gun heads are all connected to the outlet flow channel.

[0006] Through the above technical solutions, according to the actual scenario, an appropriate number of gun heads are assembled; the mixed liquid (a mixture of water and foam fire extinguishing agent under a certain pressure) enters into multiple gun heads through the inlet flow channel and the outlet flow channel, and then is sprayed through the multiple gun heads. The mixed liquid produces foam through the multiple gun heads, increasing the air intake amount in the gun heads when the foam is generated, effectively improving the foaming multiple of the mixed liquid; at the same time, the setting of multiple gun heads also increases the spraying area of the foam, enabling the foam to quickly cover the fire object.

[0007] Preferably, the gun heads are detachably connected to each other and communicate with each other.

[0008] Through the above technical solutions, the gun heads can be arranged and combined according to actual needs, that is, the number of gun heads can be increased or decreased, and the combination modes are diverse, with a wide range of applications.

[0009] Preferably, a flow dividing disk is arranged in the body, and the flow dividing disk can divide the medium in the outlet flow channel into the gun heads.

[0010] Through the above technical solution, when the mixed liquid flows from the inlet channel into the outlet channel, it is divided by the flow dividing plate, so that the whole stream of mixed liquid can be dispersed and evenly enter into multiple nozzles, ensuring that sufficient foam can be generated in each nozzle; at the same time, the flow dividing plate can also effectively reduce the problem that the mixed liquid directly impacts the outlet channel, resulting in the vibration of the foam generator, improving the working stability of the foam generator; in addition, the flow dividing plate can also avoid the problem of the mixed liquid being disordered.

[0011] Preferably, a fixing frame is arranged in the inlet channel, and the flow dividing plate is connected to the fixing frame.

[0012] Through the above technical solution, the flow dividing plate is arranged on the fixing frame, ensuring the fixed position of the flow dividing plate while the fixing frame does not affect the flow of the mixed liquid.

[0013] Preferably, the nozzles are horizontally distributed.

[0014] Through the above technical solution, the juxtaposed nozzles further increase the coverage area after the foam is sprayed, thereby increasing the fire extinguishing efficiency.

[0015] Preferably, the nozzle includes a connecting pipe and a foaming device, the connecting pipe is connected to the foaming device; the connecting pipe has a first connecting portion and a second connecting portion, the first connecting portion is adapted to the second connecting portion, the first connecting portion can be connected to the main body, and the connecting pipe is communicated with the outlet channel, and a plug is arranged on the connecting pipe to seal the second connecting portion.

[0016] Through the above technical solution, due to the adaptation of the first connecting portion and the second connecting portion, the first connecting portion of the connecting pipe can be connected to the second connecting portion of the adjacent connecting pipe to realize the arbitrary adjustment of the number of nozzles; after multiple nozzles are assembled, the two connecting pipes farthest from the main body can be sealed by plugs, thereby ensuring the sealing performance of the foam generator.

[0017] Preferably, the foaming device includes a foaming pipe, a foaming device, a foaming cylinder and a foaming assembly, the foaming pipe is connected to the connecting pipe and is communicated with the connecting pipe, the foaming device is arranged in the foaming pipe, the foaming cylinder is connected to the foaming pipe, a plurality of air inlets communicating with the outside are arranged on the foaming cylinder, and the foaming assembly is arranged in the foaming cylinder.

[0018] Through the above technical solution, the mixed liquid enters the foaming cylinder through the outlet channel, the connecting pipe and the foaming pipe. The mixed liquid acts on the foaming device in the connecting pipe and generates foam. Oxygen (oxygen in the air) enters the foaming cylinder through the air inlets, so that the mixed liquid fully contacts with the oxygen in the foaming cylinder, and the foaming assembly further increases the multiple of the foam to realize the generation of high multiple foam.

[0019] Preferably, the foaming assembly includes a first foaming plate disposed within the foaming cylinder. A number of first mesh holes are formed in the outer circumference of the first foaming plate, and the middle part of the first foaming plate is recessed away from the connecting pipe.

[0020] Through the above technical solution, the first foaming plate intercepts the mixed liquid or foam entering the foaming cylinder, preventing the direct ejection of the mixed liquid. Moreover, the middle part of the first foaming plate is recessed, increasing the storage volume of the mixed liquid. At the same time, the middle part of the first foaming plate is recessed, effectively increasing the number of the first mesh holes and improving the foaming multiple of the foam.

[0021] Preferably, the foaming assembly further includes a second foaming plate disposed within the foaming cylinder and located outside the first foaming plate. A number of second mesh holes communicating with the first mesh holes are formed in the outer circumference of the second foaming plate, and a collecting cavity is formed in the middle part of the second foaming plate, which can accommodate the first foaming plate.

[0022] Through the above technical solution, the second foaming plate is disposed outside the first foaming plate. The foam generated by the first mesh holes is discharged through the second mesh holes. The foam that is not completely discharged through the second mesh holes enters the collecting cavity. After the collecting cavity is filled with foam, the foam discharged from the first mesh holes can be directly discharged through the second mesh holes, further improving the foaming multiple of the foam.

[0023] Preferably, a first connector is provided on the main body.

[0024] Through the above technical solution, the main body can be directly connected to the lifting boom of the fire truck through the first connector.

[0025] Preferably, the foam generator further includes an extension pipe connected to the first connector, and a second connector is provided at the other end of the extension pipe.

[0026] Through the above technical solution, the extension pipe enables the foam generator to extend above the fire target, ensuring that the foam can directly cover the surface of the fire target under the action of gravity. In addition, it can also prevent the lifting boom of the fire truck from being damaged by the high temperature of the fire target.

[0027] Preferably, a housing is provided on the side of the gun head away from the main body.

[0028] Through the above technical solution, the housing can effectively prevent the high-altitude airflow from affecting the formation of foam inside the gun head, enabling the gun head to generate foam with a sufficient multiple.

[0029] Preferably, an inner cavity communicating with the gun head is formed inside the housing, and the inner cavity has a guiding surface.

[0030] Through the above technical solution, all the foam generated by the gun head enters the inner cavity and then flows out from the diversion surface, enabling the foam to gather and be discharged uniformly. This reduces the problem that the foam is affected by air flow or wind during the falling process due to its small volume, facilitating firefighters to accurately control the landing point of the foam and increasing the fire extinguishing efficiency. Additionally, the unified discharge of the gathered foam also increases the amount of foam to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of the external structure of the first embodiment;

[0032] Figure 2 is a schematic diagram of the external structure after the main body and the extension pipe are connected in the first embodiment;

[0033] Figure 3 is Figure 2 a full-sectional structure diagram of

[0034] Figure 4 is Figure 2 an exploded structure diagram of

[0035] Figure 5 is a full-sectional structure diagram of the gun head in the first embodiment;

[0036] Figure 6 is Figure 5 an enlarged view of part A of

[0037] Figure 7 is a schematic diagram of the structure of the outer cover in the first embodiment;

[0038] Figure 8 is another schematic diagram of the external structure of the first embodiment;

[0039] Figure 9 is Figure 8 a full-sectional structure diagram of

[0040] Figure 10 is a sectional view schematic diagram after the main body and the foaming device are assembled in the second embodiment;

[0041] Figure 11 is a schematic diagram of the external structure of the second embodiment;

[0042] Figure 12 is Figure 11 a full-sectional structure diagram of

[0043] Reference numerals: 100, main body; 110, inlet flow channel; 111, fixing frame; 120, outlet flow channel; 121, first outlet; 122, second outlet; 130, first joint;

[0044] 200, Gun head; 210, Connecting pipe; 211, Connecting part 1; 212, Connecting part 2; 213, Plug

[0045] 300, Diverting plate; 310, Guide surface

[0046] 400, Foaming device; 410, Foaming pipe; 411, Injection port; 420, Bubbler; 430, Foaming cylinder; 431, Air inlet; 440, Foaming assembly; 441, Foaming plate 1; 4411, Mesh hole 1; 442, Foaming plate 2; 4421, Mesh hole 2; 4422, Collection chamber

[0047] 500, Extension pipe; 510, Connector 2

[0048] 600, Outer cover; 610, Inner cavity; 611, Flow guiding surface Detailed implementation mode

[0049] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention.

[0050] The present invention will be further described in detail below with reference to the accompanying drawings.

[0051] Embodiment 1:

[0052] A multi-connected variable foam generator, as Figures 1 to 9 shown, this foam generator includes a body 100 and a gun head 200. The body 100 has an inlet flow channel 110 and an outlet flow channel 120 that are connected and communicated. At least two gun heads 200 are provided, and a number of gun heads 200 are all detachably connected to the body 100, and the gun heads 200 are all communicated with the outlet flow channel 120.

[0053] Preferably, the outlet flow channel 120 has an outlet 1 121 and an outlet 2 122, and a number of gun heads 200 are detachably connected in the outlet 1 121 and / or the outlet 2 122.

[0054] A number of gun heads 200 are detachably connected to each other, and a number of gun heads 200 communicate with each other.

[0055] A diverter plate 300 is arranged inside the main body 100, and the diverter plate 300 can divert the medium in the outlet flow channel 120 into the gun head 200. Further, a fixing frame 111 is arranged in the inlet flow channel 110, and the diverter plate 300 is connected to the fixing frame 111. The fixing frame 111 can be integrally formed inside the main body 100 or detachably arranged inside the main body 100. Preferably, the side of the diverter plate 300 facing the inlet flow channel 110 has a guiding surface 310, and the guiding surface 310 can be an arc surface or an inclined surface.

[0056] To ensure the coverage area of the foam, several gun heads 200 are horizontally distributed. As another solution, if it is necessary to ensure the amount of foam per unit time, the gun heads 200 can also be circumferentially distributed.

[0057] The gun head 200 includes a connecting pipe 210 and a foaming device 400. The connecting pipe 210 is connected to the foaming device 400. It should be noted that the connecting pipe 210 and the foaming device 400 can be integrally formed, welded or detachably connected; the connecting pipe 210 has a first connecting part 211 and a second connecting part 212. The first connecting part 211 is adapted to the second connecting part 212. The first connecting part 211 can be connected to the main body 100, and the connecting pipe 210 is communicated with the outlet flow channel 120. A plug 213 that can seal the second connecting part 212 is detachably connected to the connecting pipe 210. That is, the adjacent connecting pipes 210 can be connected through the first connecting part 211 and the second connecting part 212. Only the connecting pipe 210 far from the main body 100 needs to be sealed by the plug 213 to ensure the sealing performance after the connecting pipe 210 is connected to the outlet flow channel 120. In addition, the plug 213 can also be integrally formed with the connecting pipe 210.

[0058] Of course, the first connecting part 211 and the second connecting part 212 can also be arranged in a swapped manner, which still does not deviate from the protection scope of the present invention. The first connecting part 211 and the adjacent second connecting part 212 can be connected by other detachable connection methods such as threaded connection, clamping connection, and clamp connection.

[0059] Further, the foaming device 400 includes a foaming pipe 410, a foaming device 420, a foaming cylinder 430 and a foaming assembly 440. The foaming pipe 410 is connected to the connecting pipe 210. The end of the foaming pipe 410 far from the connecting pipe 210 is reduced in diameter to form a spraying port 411, and the foaming pipe 410 is communicated with the connecting pipe 210. The foaming device 420 is arranged inside the foaming pipe 410. The foaming cylinder 430 is connected to the foaming pipe 410. A plurality of air inlets 431 communicating with the outside are formed on the foaming cylinder 430 so that the mixed liquid can fully contact with oxygen (oxygen in the air) inside the foaming cylinder 430 to increase the foaming multiple of the mixed liquid; the foaming assembly 440 is arranged inside the foaming cylinder 430.

[0060] The foaming assembly 440 includes a first foaming plate 441, which is fixedly or detachably connected inside the foaming cylinder 430. A plurality of first mesh holes 4411 are circumferentially formed in the outer circumference of the first foaming plate 441 close to the foaming cylinder 430, and the middle part of the first foaming plate 441 is recessed toward the side away from the connecting pipe 210.

[0061] Furthermore, the foaming assembly 440 further includes a second foaming plate 442, which is arranged inside the foaming cylinder 430 and is located outside the first foaming plate 441. A plurality of second mesh holes 4421 communicating with the first mesh holes 4411 are formed in the outer circumference of the second foaming plate 442, and a collecting cavity 4422 is formed in the middle part of the second foaming plate 442, and the collecting cavity 4422 can accommodate the first foaming plate 441.

[0062] As Figure 4 , Figure 10 shown, a first joint 130 is provided on the main body 100. The first joint 130 can be a union joint or a quick connector. The foam generator further includes an extension pipe 500, which is connected to the first joint 130 and communicates with the inlet flow channel 110. The other end of the extension pipe 500 is provided with a second joint 510, and the second joint 510 can be a union joint or a quick connector.

[0063] Preferably, an outer cover 600 is provided on the side of the gun head 200 away from the main body 100. Furthermore, an inner cavity 610 communicating with the gun head 200 is formed inside the outer cover 600, and the opening of the inner cavity 610 faces the gun head 200, and the inner cavity 610 has a guiding surface 611 capable of guiding the foam.

[0064] The working principle of a multi-connected variable foam generator:

[0065] According to the actual application scenarios, install an appropriate number of gun heads 200. The outer cover 600 is installed outside the gun head 200 so that the outer cover 600 can cover the muzzle, and then install the foam generator at the end of the lifting boom of the fire truck.

[0066] The mixed liquid (water with a certain pressure and a foam extinguishing agent) enters the outlet flow channel 120 through the extension pipe 500 and the inlet flow channel 110, and then is separated by the shunt plate 300, so that the mixed liquid enters the connecting pipes 210 of multiple gun heads 200 respectively. The mixed liquid in the connecting pipes 210 is sprayed into the foaming cylinder 430 from the spray port 411 of the foaming pipe 410. After passing through the bubbler 420, preliminary foam is produced. The foam and the mixed liquid enter the foaming cylinder 430 and impact the first foaming plate 441. The oxygen continuously entering the foaming cylinder 430 through the air inlet 431 fully contacts the foam in the foaming cylinder 430, increasing the foaming multiple of the foam. Then the foam is discharged through the first mesh hole 4411 and the second mesh hole 4421, further increasing the foaming multiple of the foam; part of the foam enters the collection cavity 4422, and after the collection cavity 4422 is filled with foam, it is discharged from the second mesh hole 4421 to realize the generation of foam.

[0067] The foam generated by the gun head 200 all enters the inner cavity 610 to gather, and then is discharged from the guide surface 611 and falls on the surface of the fire target.

[0068] Each gun head 200 can generate foam. On the premise that the supply amount remains unchanged, this foam generator can effectively increase the foaming multiple of the mixed liquid. Moreover, each foaming cylinder 430 is provided with a number of air inlets 431, increasing the oxygen intake; the number of gun heads 200 can be increased or decreased, which also increases the coverage area of the foam.

[0069] Embodiment 2:

[0070] The difference between Embodiment 2 and Embodiment 1 is that as Figures 10 to 12 shown, at least one foaming device 400 is arranged on the body 100 and communicated with the outlet flow channel 120, and the remaining gun heads 200 are detachably connected to the outlet one 121 and / or the outlet two 122.

[0071] The above description is only an exemplary embodiment of the present invention, rather than used to limit the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.

Claims

1. A multi-connected variable foam generator, characterized in that: The foam generator includes a main body (100) and a gun head (200). The main body (100) has an inlet flow channel (110) and an outlet flow channel (120) that are connected. At least two gun heads (200) are provided. The gun heads (200) are all detachably connected to the main body (100), and the gun heads (200) are all connected to the outlet flow channel (120). The gun heads (200) are detachably connected to each other and communicate with each other; A flow dividing plate (300) is arranged in the main body (100), and the flow dividing plate (300) can divide the medium in the outlet flow channel (120) into the gun heads (200); Among them, the gun head (200) includes a connecting pipe (210) and a foaming device (400). The connecting pipe (210) is connected to the foaming device (400); the connecting pipe (210) has a first connecting part (211) and a second connecting part (212). The first connecting part (211) is adapted to the second connecting part (212). The first connecting part (211) can be connected to the main body (100), and the connecting pipe (210) is connected to the outlet flow channel (120). A plug (213) capable of sealing the second connecting part (212) is arranged on the connecting pipe (210); The foaming device (400) includes a foaming pipe (410), a bubbler (420), a foaming cylinder (430), and a foaming component (440). The foaming pipe (410) is connected to the connecting pipe (210) and communicates with the connecting pipe (210). The bubbler (420) is arranged in the foaming pipe (410). The foaming cylinder (430) is connected to the foaming pipe (410). A number of air inlets (431) communicating with the outside are provided on the foaming cylinder (430). The foaming component (440) includes a first foaming plate (441) and a second foaming plate (442) arranged in the foaming cylinder (430), and the second foaming plate (442) is located outside the first foaming plate (441).

2. The multi-stage variable foam generator according to claim 1, characterized in that: A fixing frame (111) is arranged in the inlet flow channel (110), and the flow dividing plate (300) is connected to the fixing frame (111).

3. The multi-stage variable foam generator according to claim 1, characterized in that: Each of the gun heads (200) is horizontally distributed.

4. The multi-stage variable foam generator according to claim 1, characterized in that: A number of first mesh holes (4411) are provided on the outer circle of the first foaming plate (441), and the middle part of the first foaming plate (441) is recessed toward the side away from the connecting pipe (210).

5. The multi-stage variable foam generator according to claim 4, characterized in that: A number of second mesh holes (4421) communicating with the first mesh holes (4411) are provided on the outer circle of the second foaming plate (442). A collecting cavity (4422) is provided in the middle part of the second foaming plate (442), and the collecting cavity (4422) can accommodate the first foaming plate (441).

6. The multi-stage variable foam generator according to any one of claims 1-5, characterized in that: A first joint (130) is arranged on the main body (100).

7. The multi-connected variable foam generator according to claim 6, characterized in that: The foam generator further includes an extension pipe (500), the extension pipe (500) is connected to the first joint (130), and the other end of the extension pipe (500) is provided with a second joint (510).

8. The multi-connected variable foam generator according to any one of claims 1-5, characterized in that: One side of the gun head (200) away from the main body (100) is provided with an outer cover (600).

9. The multi-stage variable foam generator according to claim 8, characterized in that: The outer cover (600) has a cavity (610) communicating with the gun head (200), and the cavity (610) has a flow guiding surface (611).

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