Single tube foam and jetting dual-purpose water gun

Abstract

The utility model discloses a single pipe foam flush dual -purpose water gun, include: gun body, main passage, main control valve, foam supply component, injection switching mechanism, injection switching mechanism includes valve cavity, water inlet, water outlet, valve core, be equipped with knob, first water passage, foam inlet channel, the second water passage of independent first water passage on the valve core, one end of foam inlet channel is linked together with foam supply component, and the other end is communicated with first water passage through venturi structure, wherein, through the knob of rotation, valve core has at least two preset rotation positions: foam mode position: when valve core is in this position, first water passage both ends are communicated with the water inlet and water outlet of valve cavity respectively in alignment, pure water mode position: when valve core is in this position, first water passage on it is staggered with water inlet and water outlet, and second water passage is communicated with main passage simultaneously. The utility model has the advantages of compact structure, low cost, convenient operation.

Description

Technical Field

[0001] This utility model relates to the field of foam gun technology, and in particular to a single-tube foam flushing dual-use gun. Background Technology

[0002] Currently, the technical solutions for achieving foam and water spraying functions in foam guns can be mainly divided into the following categories:

[0003] The first type is the external foam generator solution. This type of solution typically involves adding a foam generator to the nozzle of a standard high-pressure water gun. The foam generator is attached when foam spraying is needed. This method is cumbersome, requiring frequent disassembly and reassembly of the attachment, which not only reduces work efficiency but also causes inconvenience in storing and managing the attachment.

[0004] The second type is the dual-pipe parallel structure. For example, the "Dual-Pipe Foam Spraying and High-Pressure Water Rinsing Gun" disclosed in Chinese Utility Model Patent Publication No. CN204093623U. This design uses two independent fluid pipes—one for transporting clean water and the other for mixing and transporting foam liquid—and a switching valve to select which pipe to open. The inherent drawbacks of this design are also quite obvious:

[0005] Complex structure and large size: The two parallel pipes and the corresponding valve structure significantly increase the size and weight of the entire gun, making it easy for users to feel fatigued when holding it for a long time.

[0006] High manufacturing costs: Double the piping and more complex valve systems directly lead to increased material and processing / assembly costs, making the product less competitive in price.

[0007] Therefore, it is necessary to further improve and perfect the existing technology to overcome these shortcomings, and this utility model is made based on this situation. Utility Model Content

[0008] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a single-tube foam flushing dual-use gun that is compact in structure, low in cost, and easy to operate.

[0009] This utility model is achieved through the following technical solution:

[0010] To solve the above-mentioned technical problems, this utility model provides a single-tube foam flushing dual-use water gun, comprising:

[0011] The gun body has a main channel running through it;

[0012] The main control valve, located on the gun body, is used to control the opening and closing of the main channel;

[0013] A foam supply assembly, connected to the gun body, is used to store and supply foam liquid;

[0014] A jet switching mechanism is used to selectively switch between pure water mode and foam mode during use. The jet switching mechanism includes:

[0015] A valve chamber is located in the main channel and cuts it off. An inlet and an outlet are provided opposite to each other on the side wall of the valve chamber.

[0016] The valve core is rotatably disposed within the valve cavity, and the valve core is provided with:

[0017] A knob, which is connected to the valve core and extends at least partially out of the gun body, is used to drive the valve core to rotate;

[0018] First waterway;

[0019] The foam channel has one end connected to the foam supply component and the other end connected to the first water channel via a Venturi structure.

[0020] The second water channel is independent of the first water channel;

[0021] The valve core has at least two preset rotation positions when the knob is rotated:

[0022] Foam mode position: When the valve core is in this position, the two ends of the first water channel on it are aligned and connected with the inlet and outlet of the valve cavity, respectively, so that the water flowing through the first water channel can be drawn into and mixed with the foam liquid through the Venturi structure to form a foam water jet.

[0023] Pure water mode position: When the valve core is in this position, its first water channel is offset from the inlet and outlet, while the second water channel is connected to the main channel to guide the water flow to bypass the first water channel and flow directly through, forming a pure water flow spray.

[0024] To further address the technical problems to be solved by this utility model, the present utility model provides a single-tube foam flushing dual-use water gun, wherein the valve core is also provided with an air inlet channel, one end of which is open to the outside atmosphere, and the other end is connected to the first water channel through another Venturi structure.

[0025] In order to further solve the technical problems to be solved by this utility model, the present utility model provides a single-tube foam flushing dual-use water gun, wherein the second water channel is a bypass groove opened on the outer peripheral wall of the valve core.

[0026] In order to further solve the technical problems to be solved by this utility model, the present utility model provides a single-tube foam flushing dual-use water gun, wherein the valve core is provided with a first sealing ring and a second sealing ring on the periphery of the two ends of the first water channel, which can be tightly fitted to the inner wall of the valve cavity for sealing.

[0027] In order to further solve the technical problems to be solved by this utility model, the present utility model provides a single-tube foam flushing dual-use gun, wherein the foam supply component includes a foam liquid storage bottle detachably installed on the gun body, and a conduit that guides the foam liquid in the storage bottle to the foam inlet channel.

[0028] To further address the technical problems to be solved by this utility model, this utility model provides a single-tube foam flushing dual-use gun, wherein the gun body is also provided with an air replenishment structure, which is used to connect the interior of the foam liquid storage bottle with the outside atmosphere when the valve core is in the foam mode position.

[0029] To further address the technical problems addressed by this utility model, a single-tube foam flushing dual-use gun is provided. The air replenishment structure includes an air replenishment hole on the gun body, which connects the inside of the foam liquid storage bottle to the outside atmosphere. A movable valve stem is inserted into the air replenishment hole. The valve stem has a sealing plug for selectively sealing the air replenishment hole and an elastic reset component for driving the valve stem to return to the sealed position. An arc-shaped track is provided on the bottom surface of the knob, and a guide slope that gradually rises from one end to the other is provided on the track. The upper end of the valve stem abuts against the guide slope.

[0030] When the knob is turned to the foam mode position, the upper end of the valve stem is located at the lower part of the guide slope, causing the sealing plug to separate from the air inlet; when the knob is turned to the pure water mode position, the upper end of the valve stem is located at the higher part of the guide slope and is pushed by it, overcoming the elastic force of the elastic reset member, causing the sealing plug to block the air inlet.

[0031] In order to further solve the technical problems to be solved by this utility model, the present utility model provides a single-tube foam flushing dual-use gun, wherein the gun body is also provided with a gun barrel that extends forward and communicates with the main channel, and a nozzle pivotally connected to the front end of the gun barrel.

[0032] To further address the technical problems addressed by this utility model, a single-tube foam flushing dual-use water gun is provided, wherein a rotation damping mechanism is provided at the connection between the gun barrel and the nozzle, so that the nozzle can be stably maintained at any angle after swinging.

[0033] In order to further solve the technical problems to be solved by this utility model, the single-tube foam flushing dual-use gun provided by this utility model also has a positioning structure between the knob and the gun body.

[0034] Compared with the prior art, the present invention has the following advantages:

[0035] 1. This utility model features a highly integrated single-tube dual-mode switching mechanism. By designing a rotatable valve core with two built-in independent water paths (a first water path for foam mixing and a second water path for direct pure water flow) within a single main channel, this solution fundamentally solves the problems of complex structure, bulky size, and high cost of traditional dual-tube water guns. Through a simple rotation operation, a quick and clean switch can be made between the two completely isolated flow paths, ensuring no foam residue in pure water mode and achieving a truly single-tube and lightweight design.

[0036] 2. Building upon this core innovation, this utility model also integrates several designs to enhance the user experience. Among them, the automatic air replenishment structure, synchronized with mode switching, automatically replenishes air to the material bottle during foam spraying to ensure smooth material suction, and automatically seals to prevent liquid leakage when switching to pure water mode—a highly intelligent design. Simultaneously, the addition of a 180° oscillating nozzle with damping positioning significantly expands the angle and range of cleaning operations, allowing users to easily clean hard-to-reach areas such as under and on the roof of vehicles, significantly enhancing the product's practicality and convenience. Attached Figure Description

[0037] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0038] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0039] Figure 2 This is an exploded view of the present invention;

[0040] Figure 3 This is one of the cross-sectional views of this utility model (foam pattern);

[0041] Figure 4 This is a second cross-sectional view of the present invention (pure water mode);

[0042] Figure 5 This is an exploded diagram of the gas-replenishing structure. Detailed Implementation

[0043] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] Please see Figures 1 to 5 This embodiment provides a preferred implementation of a single-tube foam flushing dual-use water gun.

[0045] like Figure 1 and Figure 2 As shown, the water gun in this embodiment mainly includes a gun body 1 as the main operating body, a main control valve 2 on the gun body 1 for controlling the main water flow switch, a foam supply component 3 for containing and supplying foam liquid, a spray switching mechanism 4 as the core function, a forward-extending gun barrel 5, and a nozzle 6 installed at the front end of the gun barrel 5.

[0046] A main channel 11 is formed along the length of the gun body 1 to guide the inflow of external water (not shown). The main control valve 2 is preferably a trigger-type valve that is linked to a trigger on the gun body 1. The user can easily control the opening and closing of the main channel 11 by pulling or releasing the trigger.

[0047] In this embodiment, the foam supply assembly 3 specifically includes a foam liquid storage bottle 31 that is detachably installed below the gun body 1 via a threaded connection or other means, and a conduit 32 extending upward from the inside of the storage bottle 31. This detachable design allows the user to easily replenish the foam liquid or clean the bottle at any time. Preferably, a fine mesh is provided at the lower end of the conduit 32.

[0048] The core injection switching mechanism 4 is integrated inside the gun body 1 and connected in series in the main channel 11. Its function is to switch between pure water and foam modes in a single barrel 5. The mechanism includes a valve chamber 41 and a valve core 42 that can rotate within the valve chamber 41. The wall of the valve chamber 41 has an inlet 411 that connects to the upstream of the main channel 11 and an outlet 412 that connects to the downstream of the main channel 11 (i.e., leading to the barrel 5).

[0049] The valve core 42 is a key component for mode switching. It has a knob 43 that can be manually operated by the user. The upper half of the knob 43 is exposed outside the gun body 1, and the lower half is fixedly connected to the valve core 42. The user can drive the valve core 42 to rotate inside the valve cavity 41 by turning the knob 43.

[0050] To achieve two different injection modes, two independent fluid passages are designed on the valve core 42:

[0051] First water channel 421: This is a transverse channel that runs through the valve core 42 and is used for foam mode.

[0052] Second water channel 423: This is a channel independent of the first water channel 421, used for pure water mode. In this embodiment, to simplify the structure and manufacturing, the second water channel 423 is preferably a bypass groove formed on the outer peripheral wall of the valve core 42.

[0053] Furthermore, the first water channel 421 is connected via a Venturi structure to a foam inlet channel 422 for drawing in foam liquid and an air inlet channel 424 for drawing in air. The other end of the foam inlet channel 422 is connected to the foam liquid storage bottle 31 via a conduit 32. The other end of the air inlet channel 424 is directly connected to the outside atmosphere.

[0054] To ensure a tight seal, a first sealing ring 425 and a second sealing ring 426 are respectively provided around the two ends of the first water channel 421 on the valve core 42. They can keep in close contact with the inner wall of the valve cavity 41 when the valve core 42 rotates.

[0055] This water gun combines foam spraying and water spraying into one, using a single water nozzle, which greatly reduces the volume and weight of the nozzle. This not only improves the user experience but also simplifies the structure, thereby reducing costs.

[0056] The following is combined with Figure 3 and Figure 4 Detailed explanation of how this water gun works:

[0057] 1) Bubble pattern (e.g.) Figure 3 (As shown)

[0058] When the user needs to spray foam, turn knob 43 to rotate valve core 42 to the "foam mode position". In this position:

[0059] The two ends of the first water channel 421 on the valve core 42 are aligned and connected with the inlet 411 and outlet 412 of the valve cavity 41, respectively, to form the main water channel.

[0060] Meanwhile, the second water channel 423 (bypass groove) rotates to a non-connected position and does not participate in the water flow.

[0061] At this moment, the user pulls the trigger, and high-pressure water flows from the inlet 411 into the first water channel 421. Due to the presence of the Venturi structure, the water flow is accelerated within the channel, creating a local negative pressure at the openings of the foam inlet channel 422 and the air inlet channel 424. This negative pressure generates a strong suction force, drawing the foam liquid from the foam liquid storage bottle 31 through the conduit 32 and the foam inlet channel 422, while simultaneously drawing in outside air through the air inlet channel 424. The water, foam liquid, and air mix and agitate violently within the first water channel 421, forming rich and dense foam, which is finally ejected through the outlet 412, the barrel 5, and the nozzle 6.

[0062] 2) Pure water mode (e.g.) Figure 4 (As shown)

[0063] When the user needs to spray pure water for rinsing, turn knob 43 in the opposite direction to rotate valve core 42 to the "pure water mode position". In this position:

[0064] The two ends of the first water channel 421 are completely offset from the inlet 411 and the outlet 412. Both ends are effectively blocked by the inner wall of the valve cavity 41 and the sealing rings 425 and 426, thereby completely cutting off the connection with the foam supply component 3.

[0065] At the same time, the second water channel 423 (bypass groove) opened on the outer peripheral wall of the valve core 42 is rotated to a position that can bridge the inlet 411 and the outlet 412.

[0066] At this point, the user pulls the trigger, and high-pressure water enters from the inlet 411, flows directly through the second water channel 423 (which serves as a bypass), and then flows out from the outlet 412, entering the barrel 5 and the nozzle 6. Throughout the process, the water completely bypasses the first water channel 421 that generates foam, thus spraying out a pure high-pressure water stream, achieving a thorough and residue-free mode switch.

[0067] To improve product performance and user experience, this embodiment also includes the following design:

[0068] Linked air supply structure (see also) Figure 5 )

[0069] To address the issue of negative pressure within the storage bottle 31 causing difficulties in subsequent liquid aspiration during foam liquid extraction, this embodiment incorporates a gas replenishment structure on the gun body 1 that is linked to mode switching. This structure includes a gas replenishment port 12 connecting the interior of the storage bottle 31 to the external atmosphere, and a valve stem 33 that can move up and down within the port to open and close. The valve stem 33 is equipped with a sealing plug 34, and an elastic reset element 35 (such as a spring) continuously applies an upward reset force, causing it to tend to block the gas replenishment port 12 under normal conditions.

[0070] The linkage relies on a special design on the bottom surface of the knob 43—an arc-shaped track 431 with a guide ramp 4311. The height of this ramp gradually increases from one end to the other. The upper end of the valve stem 33 always elastically abuts against this guide ramp.

[0071] When knob 43 is in the foam mode position (e.g.) Figure 3 The upper end of valve stem 33 corresponds to the lower part of track 431. The guide slope 4311 pushes valve stem 33 downward, overcoming the elastic force of elastic reset member 35. Valve stem 33 moves down, and the sealing plug 34 on it separates from the air inlet 12, opening the air inlet. In this way, whenever foam liquid is sucked out, outside air can be replenished into the bottle immediately, maintaining the balance of internal and external air pressure and ensuring smooth foam suction.

[0072] When knob 43 is turned to the pure water mode position (e.g.) Figure 4The upper end of valve stem 33 slides to a higher position on track 431. Under the action of elastic reset member 35, valve stem 33 moves upward, causing sealing plug 34 to tightly seal air inlet 12. This effectively prevents foam liquid in the storage bottle from leaking out from air inlet during non-foaming mode or handling.

[0073] Swingable nozzle and damping positioning mechanism

[0074] To clean areas that are difficult to reach with traditional linear water guns, the nozzle 6 in this embodiment is connected to the front end of the barrel 5 via a pivot that allows it to swing 180° up and down. To ensure that the nozzle 6 can be stably maintained after the angle is adjusted and to prevent the angle from being changed by the impact force of the water flow, a rotation damping mechanism is also provided at its connection point.

[0075] The mechanism preferably includes two rotatable first rotating disks 61 and second rotating disks 62. A ring of first positioning grooves 611 is evenly distributed on the side of the first rotating disk 61, while a first spring plunger 63 with a built-in spring is installed on the side of the second rotating disk 62. The head of the spring plunger 63 always elastically presses against the side of the first rotating disk 61. When the user swings the nozzle 6, the head of the spring plunger 63 "bounces" between the positioning grooves. Each time it engages with a positioning groove, it creates a clear, tactile feedback and provides sufficient friction and positioning force, allowing the nozzle to be stably maintained at any selected angle.

[0076] Positioning and Limitation of Mode Switching

[0077] To ensure that the user can accurately switch the valve core 42 to the preset mode position, a positioning structure is provided between the knob 43 and the gun body 1. This structure preferably consists of a second spring plunger 432 mounted on the gun body 1 and two positioning grooves 433 corresponding to the positions on the bottom surface of the knob 43. When the knob 43 is turned to the precise position of foam mode or pure water mode, the head of the spring plunger 432 will click into the corresponding groove, providing the user with clear tactile feedback.

[0078] Meanwhile, to prevent damage to internal components from excessive rotation by the user, a limiting structure is provided between the valve core 42 and the gun body 1. For example, a protrusion 427 is provided on the valve core 42, and a fan-shaped limiting groove 13 is opened at the corresponding position on the gun body 1. The protrusion 427 can only move within the range of the limiting groove 13, thereby precisely limiting the rotation range of the valve core 42 between pure water mode and foam mode.

[0079] In addition, this embodiment uses an extended barrel, which increases the cleaning distance, so that it can clean areas that are otherwise inaccessible.

[0080] In summary, this invention, by incorporating a rotatable valve core with two independent water paths (a first water path and a second water path) within a single main channel, successfully achieves complete separation and rapid switching between pure water and foam modes within a single-pipe structure. Compared to existing technologies, this solution features a highly integrated structure, significantly reducing the size and weight of the water gun and lowering production costs. The rotation of the valve core and the cooperation of the sealing ring ensure clean and efficient mode switching, avoiding cross-contamination. Detailed designs such as the linked air supply structure and the damped, oscillating nozzle greatly enhance the product's practicality and user experience.

Claims

1. A single-tube foam flushing dual-use gun, characterized in that, include: The gun body (1) has a main channel (11) running through it; The main control valve (2) is located on the gun body (1) and is used to control the opening and closing of the main channel (11); Foam supply assembly (3), connected to the gun body (1), is used to store and supply foam liquid; A jet switching mechanism (4) is used to selectively switch between pure water mode and foam mode during use. The jet switching mechanism (4) includes: A valve chamber (41) is located in the main channel (11) and cuts it off. An inlet (411) and an outlet (412) are provided opposite to each other on the side wall of the valve chamber (41). A valve core (42) is rotatably disposed within the valve cavity (41), and the valve core (42) is provided with: A knob (43), which is connected to the valve core (42) and extends at least partially out of the gun body (1), is used to drive the valve core (42) to rotate; First waterway (421); The foam channel (422) is connected at one end to the foam supply component (3) and at the other end to the first water channel (421) via a Venturi structure. The second water channel (423) is independent of the first water channel (421); The valve core (42) has at least two preset rotation positions when the knob (43) is rotated: Foam mode position: When the valve core (42) is in this position, the two ends of the first water channel (421) on it are aligned and connected with the inlet (411) and outlet (412) of the valve cavity (41) respectively, so that the water flowing through the first water channel (421) can be sucked in and mixed by the Venturi structure to form a foam water flow sprayed out. Pure water mode position: When the valve core (42) is in this position, the first water channel (421) on it is offset from the inlet (411) and outlet (412), while the second water channel (423) is connected to the main channel (11) to guide the water flow to bypass the first water channel (421) and flow directly through to form a pure water flow spray.

2. The single-tube foam flushing dual-use gun according to claim 1, characterized in that: The valve core (42) is also provided with an air intake channel (424), one end of which is open to the outside atmosphere, and the other end is connected to the first water channel (421) through another Venturi structure.

3. The single-tube foam flushing dual-use gun according to claim 1, characterized in that: The second water channel (423) is a bypass groove formed on the outer peripheral wall of the valve core (42).

4. The single-tube foam flushing dual-use gun according to claim 1, characterized in that: The valve core (42) is provided with a first sealing ring (425) and a second sealing ring (426) at the periphery of both ends of the first water channel (421) to seal tightly against the inner wall of the valve cavity (41).

5. A single-tube foam flushing dual-use gun according to claim 1, characterized in that: The foam supply assembly (3) includes a foam liquid storage bottle (31) detachably mounted on the gun body (1) and a conduit (32) that guides the foam liquid in the storage bottle to the foam inlet channel (422).

6. A single-tube foam flushing dual-use gun according to claim 5, characterized in that: The gun body (1) is also provided with an air replenishment structure, which is used to connect the interior of the foam liquid storage bottle (31) with the outside atmosphere when the valve core (42) is in the foam mode position.

7. A single-tube foam flushing dual-use gun according to claim 6, characterized in that: The air replenishment structure includes an air replenishment hole (12) on the gun body (1), the air replenishment hole (12) connects the inside of the foam liquid storage bottle (31) and the outside atmosphere, a valve stem (33) that can be raised and lowered is inserted in the air replenishment hole (12), the valve stem (33) is provided with a sealing plug (34) for selectively blocking the air replenishment hole (12) and an elastic reset member (35) for driving the valve stem (33) to reset towards the blocking position; the bottom surface of the knob (43) is provided with an arc-shaped track (431), the track (431) is provided with a guide slope (4311) that gradually rises from one end to the other end, and the upper end of the valve stem (33) abuts against the guide slope (4311); When the knob (43) is turned to the foam mode position, the upper end of the valve stem (33) is located at the lower part of the guide slope (4311), causing the sealing plug (34) to separate from the air inlet (12); when the knob (43) is turned to the pure water mode position, the upper end of the valve stem (33) is located at the higher part of the guide slope (4311) and is pushed by it, overcoming the elastic force of the elastic reset member (35), causing the sealing plug (34) to block the air inlet (12).

8. A single-tube foam flushing dual-use water gun according to claim 1, characterized in that: The gun body (1) is also provided with a gun barrel (5) that extends forward and communicates with the main channel (11), and a nozzle (6) that is pivotally connected to the front end of the gun barrel (5).

9. A single-tube foam flushing dual-use gun according to claim 8, characterized in that: A rotation damping mechanism is provided at the connection between the barrel (5) and the nozzle (6) so that the nozzle (6) can be stably maintained at any angle after swinging.

10. A single-tube foam flushing dual-use gun according to claim 1, characterized in that: A positioning structure is also provided between the knob (43) and the gun body (1).

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