Foam water gun head capable of increasing foam expansion

Abstract

The utility model relates to the technical field of foam water guns, and discloses a foam water gun head capable of improving foam expansion, which comprises a water gun connecting body, a water inlet end of the water gun connecting body is provided with a pipe tooth interface connected with a fire hose; one end of the spraying barrel is fixedly arranged at the water spraying end of the water gun connecting body in a sleeving manner; one end of the connecting pipe is communicated with the foam liquid inlet end of the water gun connector, and the other end of the connecting pipe is introduced into the foam liquid storage equipment; the operating hand wheel is fixedly arranged at one end of the spraying barrel in a sleeving manner; the proportioning mixer is arranged in the water gun connecting body; the plurality of air inlets are formed in the water gun connecting body; and the air inducing assembly is arranged on the water gun connecting body. According to the gun head of the foam water gun provided by the utility model, by optimizing the layout of the air inlet and introducing the air inducing assembly, air can be uniformly sucked even in a strong wind environment, and the mixing effect of the air and foam liquid is improved, so that the generation multiple and the quality of foam are remarkably enhanced, and the reliability and the flexibility of the device are improved.

Description

Technical Field

[0001] This utility model relates to the field of foam water gun technology, and in particular to a foam water gun nozzle that improves the foaming ratio. Background Technology

[0002] An air foam gun, sometimes called a foam generator or foam spray gun, is a fire-fighting device specifically designed to generate and spray foam. It is typically used in conjunction with fire trucks or other fire extinguishing systems and plays an important role in extinguishing special types of fires such as oil and chemical fires.

[0003] Self-priming air foam guns utilize the negative pressure effect generated when water flows through the nozzle to draw in and mix foam liquid with air. This design allows the device to automatically draw in foam liquid and mix it with air to generate foam without an external pumping system. However, in strong wind environments, existing self-priming air foam guns face significant operational challenges. Specifically, when the strong wind is perpendicular to or at an angle to the foam gun axis, the air inlet facing the strong wind can effectively draw in air, but the air inlets facing away from or parallel to the strong wind cannot effectively draw in air due to changes in the local pressure environment caused by the external wind. Especially when the internal water flow velocity is low, the negative pressure generated by the Venturi effect is insufficient to overcome the influence of the external wind, further reducing the amount of air entering. This uneven air intake not only reduces the overall airflow and foaming ratio but also affects the thorough mixing of air and foam liquid, resulting in unstable foam quality, low coverage efficiency, and the potential formation of large foam bubbles, thereby weakening the fire extinguishing effect.

[0004] Therefore, it is necessary to design a foam water gun nozzle that can increase the foaming ratio to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a foam water gun nozzle that increases the foaming ratio.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A foam water gun nozzle for increasing foaming ratio includes: a water gun connector, the water inlet end of which is provided with a threaded interface for connecting to a fire water pipe; a spray nozzle, one end of which is fixedly sleeved on the spray end of the water gun connector; a connecting pipe, one end of which is connected to the foam liquid inlet end of the water gun connector, and the other end of which leads to a foam liquid storage device; an operating handwheel, fixedly sleeved on one end of the spray nozzle; a proportioning mixer, disposed inside the water gun connector and located between the foam liquid inlet end and the spray end of the water gun connector; a plurality of air inlets, disposed on the water gun connector and located between the proportioning mixer and the spray end of the water gun connector; and an air intake assembly, disposed on the water gun connector, for introducing natural air into the air inlets.

[0008] As a preferred technical solution of this utility model, the air-guiding assembly includes an air-guiding hood, with through-holes at the center of both sides of the air-guiding hood. The water gun connector passes through the two through-holes, and the air inlet corresponds to the air-guiding hood. An opening is provided on the outer ring of the air-guiding hood. Two limiting plates are fixedly fitted on the water gun connector, and the air-guiding hood is located between the two limiting plates. Magnetic plates are embedded in the opposite sidewalls of the two limiting plates. The sidewalls of the air-guiding hood are made of iron.

[0009] As a preferred embodiment of this utility model, all the air inlets are arranged at equal intervals in a circumferential direction.

[0010] As a preferred embodiment of this utility model, the inner ring of the air duct is fixedly connected with a plurality of guide blocks, and the cross-section of the guide blocks is triangular.

[0011] As a preferred embodiment of this utility model, a sealing ring is fixed to the inner side of the through-hole.

[0012] As a preferred technical solution of this utility model, deformable thin plates are provided on both sides of the opening, and one side of the thin plates is fixedly connected to the air hood.

[0013] This utility model has the following beneficial effects:

[0014] 1. Enhanced foaming efficiency: By optimizing the air inlet layout and introducing air intake components, it is ensured that air can be drawn in evenly even in strong winds, improving the mixing effect of air and foam liquid, thereby significantly enhancing the foam generation ratio and quality.

[0015] 2. High adaptability: The position and angle of the exhaust hood can be flexibly adjusted according to actual environmental conditions to adapt to different wind directions and intensities, ensuring that the device can work stably in various harsh environments, greatly improving the practicality and reliability of the equipment;

[0016] 3. Easy to operate: The design of the magnetic plate and the limiting plate makes it easy and reliable to fix the position of the air hood. Users can quickly adjust the device to meet different work needs without complicated tools or professional skills.

[0017] 4. Multi-functional adjustment: By moving or rotating the air intake cover, users can flexibly control the amount of air entering according to the actual situation. They can increase the air intake under strong wind conditions or reduce the amount of air entering under mild conditions, thereby adjusting the foaming ratio to meet the needs of different scenarios.

[0018] 5. Compact and reasonable structure: The overall structure is compact and the components fit together closely, which not only makes it easy to carry and operate, but also minimizes the size without sacrificing performance, thus improving portability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a foam water gun nozzle for improving the foaming ratio proposed in this utility model;

[0020] Figure 2 This is a structural diagram of the water gun connector, the draft hood, and the operating handwheel;

[0021] Figure 3 This is a schematic diagram of the internal structure of the air intake shroud.

[0022] In the diagram: 1 Water gun connector, 2 Pipe thread interface, 3 Spray nozzle, 4 Connecting pipe, 5 Operating handwheel, 6 Proportional mixer, 7 Air inlet, 8 Air duct, 9 Opening, 10 Limiting plate, 11 Magnetic plate, 12 Through-hole, 13 Sealing ring, 14 Guide block, 15 Thin plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Reference Figure 1-3 A foam water gun nozzle for increasing foaming ratio, comprising:

[0025] Water gun connector 1, which is provided with a water inlet, a water spraying end and a foam liquid inlet. The water inlet of the water gun connector 1 is provided with a threaded interface 2 for connecting to a fire water pipe.

[0026] The nozzle 3 is fixedly sleeved at one end of the water gun connector 1. The diameter of the nozzle 3 outlet is smaller than that of other parts. This design can utilize the Venturi effect, that is, the fluid speed increases and the pressure decreases when passing through a narrow channel, thereby increasing the foam spray speed and enabling it to cover the fire source area further. At the same time, it reduces the turbulence loss of foam liquid during the spraying process, making the foam liquid more concentrated and stable.

[0027] Connecting pipe 4, one end is connected to the foam liquid inlet end of water gun connector 1, and the other end is connected to the foam liquid storage device;

[0028] The operating handwheel 5 is fixedly sleeved on one end of the spray nozzle 3, and the operating handwheel 5, the spray nozzle 3, and the water gun connector 1 are fixed together by screws;

[0029] The proportioning mixer 6 is installed inside the water gun connector 1, and the proportioning mixer 6 is located between the foam liquid inlet end and the water spray end of the water gun connector 1. The proportioning mixer 6 utilizes the Venturi effect to achieve automatic suction and mixing of foam liquid. When the water flows through the Venturi tube, the flow rate increases and the pressure decreases, forming a significant low-pressure zone at the narrowest point. The suction generated by the low-pressure zone can draw the foam liquid from the storage tank into the water flow.

[0030] Several air inlets 7 are provided on the water gun connector 1 and located between the proportioning mixer 6 and the spray end of the water gun connector 1. All the air inlets 7 are arranged at equal intervals in a circumferential direction, so that the air can be evenly distributed into the water gun connector 1 to ensure the mixing effect of foam liquid and air.

[0031] An air intake assembly, mounted on the water gun connector 1, is used to guide natural air into the air inlet 7. The air intake assembly includes an air intake hood 8, with through-holes 12 at the center of both sides of the hood 8. The water gun connector 1 passes through both through-holes 12, and a sealing ring 13 is fixed inside each through-hole 12. The air inlet 7 corresponds to the air intake hood 8. The sealing ring 13 ensures the airtightness of the connection between the water gun connector 1 and the air intake hood 8, allowing sufficient air to enter the air inlet 7. Furthermore, it reduces wear between the air intake hood 8 and the water gun connector 1 when the hood 8 rotates or slides. An opening 9 is provided on the outer ring of the air intake hood 8. Two limiting plates 10 are fixedly fitted onto the water gun connector 1, with the air intake hood 8 positioned between the two limiting plates 10. The limiting plates 10 provide support to the air intake hood 8 in the water... The horizontal movement serves as a limit, and magnetic plates 11 are embedded in the opposite sidewalls of the two limiting plates 10. The sidewall of the air duct 8 is made of iron. Under the action of the magnetic plates 11, the position of the air duct 8 can be fixed. Furthermore, several guide blocks 14 are fixedly connected to the inner ring of the air duct 8. The cross-section of the guide block 14 is triangular. The guide block 14 is directly opposite the air inlet 7. Under the action of the guide block 14, the air entering the air duct 8 can be guided to the air inlet 7. Deformable thin plates 15 are provided on both sides of the opening 9. One side of the thin plate 15 is fixedly connected to the air duct 8. The thin plate 15 is made of aluminum alloy and has good ductility and tensile strength. By changing the angle of the thin plate 15, the air duct effect of the device can be optimized, thereby increasing the foaming ratio.

[0032] The specific working principle of this utility model is as follows:

[0033] In a strong wind environment, when the direction of the strong wind is at a certain angle to the water spray path of the device, the user rotates the air intake cover 8 so that the opening 9 faces the strong wind and fixes it with the magnetic plate 11. Then, the angle of the thin plate 15 is bent and adjusted to improve the air intake effect. After adjustment, the device is started. The water source enters the water gun connector 1 through the pipe thread interface 2. Under the action of the proportioning mixer 6, the foam enters the proportioning mixer 6 through the connecting pipe 4 under negative pressure and mixes with the water source. Then, the foam liquid flows through the opening 9. The negative pressure formed in the water gun connector 1 can drive the outside air into the device through the opening 9 and mix with the foam liquid. Finally, the mixed fluid is sprayed out through the spray nozzle 3. During the process of air entering the water gun connector 1... Air first enters the air intake hood 8. Some of the strong air will directly enter the device through the front strong air intake 7, while the remaining strong air will flow along the inner ring of the air intake hood 8 and be evenly drawn into the air intake 7 under the action of the guide block 14. This design ensures that there is air circulation in each air intake 7, which increases the air flow rate and thus increases the foaming ratio. At the same time, the dispersed entry of air can ensure that the air and foam liquid are fully and evenly mixed, improving the foaming quality. Conversely, when the air intake hood 8 is not needed, the air intake hood 8 is slid to be attached to another limiting plate 10. Under the action of the magnetic plate 11, the position of the air intake hood 8 can be fixed, so that all the air intakes 7 can directly contact the outside, allowing air to enter the device evenly.

[0034] Furthermore, when it is necessary to reduce the amount of air entering, the air intake hood 8 can be moved to the corresponding position of the air inlet 7. Under mild conditions, the air intake hood 8 allows air to enter the air inlet 7 only through the opening 9, which hinders the smooth entry of air and thus achieves the purpose of reducing the amount of air entering and reducing the foaming ratio. Under strong wind conditions, rotating the air intake hood 8 changes the angle between the opening 9 and the wind direction. In particular, when the opening 9 is adjusted to face away from the strong wind, the amount of air entering is greatly reduced. Therefore, with this design, the purpose of flexibly adjusting the amount of air entering can be achieved, improving the applicability and reliability of the device.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A foam water gun nozzle for increasing foaming ratio, characterized in that, include: Water gun connector (1), the water inlet end of which is provided with a threaded interface (2) for connecting to a fire water pipe; Spray tube (3), one end of which is fixedly sleeved on the spray end of the water gun connector (1); The connecting pipe (4) is connected at one end to the foam liquid inlet of the water gun connector (1), and at the other end to the foam liquid storage device. The handwheel (5) is fixedly mounted on one end of the spray nozzle (3); A proportioning mixer (6) is disposed inside the water gun connector (1), and the proportioning mixer (6) is located between the foam liquid inlet end and the water spray end of the water gun connector (1); Several air inlets (7) are provided on the water gun connector (1) and located between the proportioning mixer (6) and the water spray end of the water gun connector (1); The air intake assembly is installed on the water gun connector (1) and is used to introduce natural air into the air inlet (7).

2. The foam water gun nozzle for increasing foaming ratio according to claim 1, characterized in that, The air intake assembly includes an air intake hood (8), with through openings (12) at the center of both sides of the air intake hood (8). The water gun connector (1) passes through the two through openings (12), and the air inlet (7) corresponds to the air intake hood (8). An opening (9) is provided on the outer ring of the air intake hood (8). Two limiting plates (10) are fixedly fitted on the water gun connector (1), and the air intake hood (8) is located between the two limiting plates (10). Magnetic plates (11) are embedded in the opposite side walls of the two limiting plates (10). The side walls of the air intake hood (8) are made of iron.

3. The foam water gun nozzle for increasing foaming ratio according to claim 1, characterized in that, All of the air inlets (7) are arranged at equal intervals in a circumferential direction.

4. A foam water gun nozzle for increasing foaming ratio according to claim 2, characterized in that, The inner ring of the air hood (8) is fixedly connected with several guide blocks (14), and the cross-section of the guide blocks (14) is triangular.

5. A foam water gun nozzle for increasing foaming ratio according to claim 2, characterized in that, A sealing ring (13) is fixed to the inside of the through-hole (12).

6. A foam water gun nozzle for increasing foaming ratio according to claim 2, characterized in that, Deformable thin plates (15) are provided on both sides of the opening (9), and one side of the thin plate (15) is fixedly connected to the air hood (8).

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