Single-pipe foam flushing dual-purpose water gun

Abstract

The invention discloses a single-pipe foam flushing dual-purpose water gun which comprises a gun body, a main channel, a main control valve, a foam supply assembly and a spraying switching mechanism. The spraying switching mechanism comprises a valve cavity, a water inlet, a water outlet and a valve element, the valve element is provided with a rotary knob, a first water channel, a foam inlet channel and a second water channel independent of the first water channel, one end of the foam inlet channel communicates with the foam supply assembly, and the other end of the foam inlet channel communicates with the first water channel through a Venturi structure; wherein by rotating the knob, the valve core has at least two preset rotating positions: a foam mode position: when the valve core is located at the position, the two ends of the first water channel are respectively aligned and communicated with the water inlet and the water outlet of the valve cavity; in the pure water mode position, when the valve element is located at the position, the first water channel in the valve element is staggered with the water inlet and the water outlet, and meanwhile the second water channel is communicated with the main channel. The device has the advantages of being compact in structure, low in cost and convenient to operate.

Description

Technical Field

[0001] The invention relates to the technical field of foam guns, in particular to a single-tube foam-flushing and dual-use water gun. Background Art

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

[0003] The first type is an external foam generator solution. This solution typically involves attaching a foam generator to the nozzle of a standard high-pressure water gun. The generator is then installed when foam is needed. This method is cumbersome and requires frequent installation and removal of accessories, which not only reduces work efficiency but also makes storage and management of the accessories inconvenient.

[0004] The second type is a dual-pipe parallel structure. For example, Chinese invention patent publication CN204093623U discloses a "dual-tube foam spray and high-pressure water flushing gun." This design uses two independent fluid pipes—one for delivering clean water and the other for mixing and delivering foam liquid—with a switching valve to select which pipe to open. This solution also has obvious inherent drawbacks:

[0005] Complex structure and bulky size: Two parallel pipes and the corresponding valve body structure significantly increase the size and weight of the entire gun body, and users may feel tired after long-term hand-held operation.

[0006] High manufacturing costs: Double piping and more complex valve systems directly lead to increased material costs and processing and assembly costs, making product prices uncompetitive.

[0007] Therefore, it is necessary to further improve and perfect the existing technology to overcome these shortcomings, and the present invention is made based on this situation. Summary of the Invention

[0008] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a single-tube foam-flushing dual-purpose water gun which has a compact structure, low cost and convenient operation.

[0009] The present invention is achieved through the following technical solutions:

[0010] In order to solve the above technical problems, the present invention provides a single-tube foam flushing dual-purpose water gun, comprising:

[0011] A gun body, through which a main passage is provided;

[0012] A main control valve is provided on the gun body and is used to control the opening and closing of the main channel;

[0013] A foam supply assembly, connected to the gun body, for storing and supplying foam liquid;

[0014] The spray switching mechanism is used to selectively switch between pure water mode and foam mode during use, and the spray switching mechanism includes:

[0015] a valve cavity, disposed in the main channel and blocking it, with a water inlet and a water outlet being oppositely disposed on the sidewalls of the valve cavity;

[0016] A valve core is rotatably disposed in the valve cavity, and is provided with:

[0017] a knob connected to the valve core and at least partially extending out of the gun body, for driving the valve core to rotate;

[0018] First Water Channel;

[0019] a foam inlet channel, one end of which is connected to the foam supply assembly and the other end of which is connected to the first water channel via a venturi structure;

[0020] a second water channel, which is independent of the first water channel;

[0021] Wherein, by rotating the knob, the valve core has at least two preset rotation positions:

[0022] Foam mode position: When the valve core is in this position, the two ends of the first water channel thereon are aligned and connected with the water inlet and water outlet of the valve cavity respectively, so that the water flowing through the first water channel can be sucked in and mixed with the foam liquid through the Venturi structure to form a foam water flow for spraying;

[0023] Pure water mode position: When the valve core is in this position, the first water channel thereon is staggered with the water inlet and the water outlet, and at the same time the second water channel is connected with 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] In order to further solve the technical problem to be solved by the present invention, in a single-tube foam flushing dual-purpose water gun provided by the present invention, an air intake channel is also provided on the valve core, one end of the air intake channel leads 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 problem to be solved by the present invention, the present invention provides a single-tube foam-flushing dual-purpose water gun, wherein the second water channel is a bypass groove provided on the outer peripheral wall of the valve core.

[0026] In order to further solve the technical problem to be solved by the present invention, in a single-tube foam-flushing dual-purpose water gun provided by the present invention, the valve core is respectively provided with a first sealing ring and a second sealing ring at the periphery of the two ends of the first water channel, which can fit tightly with the inner wall of the valve cavity for sealing.

[0027] In order to further solve the technical problem to be solved by the present invention, the present invention provides a single-tube foam flushing dual-purpose water gun, in which the foam supply assembly includes a foam liquid storage bottle detachably mounted on the gun body, and a conduit that guides the foam liquid in the storage bottle to the foam inlet channel.

[0028] In order to further solve the technical problem to be solved by the present invention, the present invention provides a single-tube foam flushing dual-purpose water gun, in which an air supply structure is also provided on the gun body, and the air supply structure is used to connect the interior of the foam liquid storage bottle with the external atmosphere when the valve core is in the foam mode position.

[0029] In order to further solve the technical problem to be solved by the present invention, the present invention provides a single-tube foam-flushing dual-purpose water gun, wherein the air-supply structure includes an air-supply hole provided on the gun body, the air-supply hole communicating with the interior of the foam liquid storage bottle and the outside atmosphere, a liftable valve stem inserted into the air-supply hole, the valve stem being provided with a sealing plug for selectively blocking the air-supply hole, and an elastic return member for driving the valve stem to return to a blocked position; an arc-shaped track is provided on the bottom surface of the knob, the track being provided with a guide slope that gradually rises from one end to the other end, and the upper end of the valve stem abuts against the guide slope;

[0030] When the knob is rotated to the foam mode position, the upper end of the valve stem is located at the lower part of the guide slope, so that the sealing plug is separated from the air supply hole; when the knob is rotated 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 up by it, overcoming the elastic force of the elastic reset part, so that the sealing plug blocks the air supply hole.

[0031] In order to further solve the technical problem to be solved by the present invention, the present invention provides a single-tube foam flushing dual-purpose water gun, wherein the gun body is further provided with a gun barrel extending forward and connected to the main channel, and a nozzle pivotally connected to the front end of the gun barrel.

[0032] In order to further solve the technical problem to be solved by the present invention, in a single-tube foam flushing dual-purpose water gun provided by the present invention, 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 problem to be solved by the present invention, in the single-tube foam-flushing dual-purpose water gun provided by the present invention, a positioning structure is further provided between the knob and the gun body.

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

[0035] 1. This invention features a highly integrated single-tube, dual-mode switching mechanism. By designing a rotatable valve core within a single main channel, housing two independent water paths (a first channel for foam mixing and a second channel for pure water), this solution fundamentally addresses the complex, bulky, and costly challenges of traditional dual-tube water guns. A simple rotation allows for quick and clean switching between the two completely isolated flow paths, ensuring no residual foam in pure water mode and achieving a truly single-tube, lightweight design.

[0036] 2. Beyond this core innovation, this invention also incorporates several features to enhance the user experience. Among them, the automatic air-replenishing mechanism, synchronized with mode switching, automatically replenishes air to the bottle during foam spraying to ensure smooth suction, and automatically seals when switching to pure water mode to prevent liquid leakage – a highly intelligent design. Furthermore, the addition of a 180° oscillating nozzle with a damping positioning function greatly expands the cleaning angle and range, allowing users to easily clean hard-to-reach areas such as vehicle undercarriages and roofs, significantly enhancing the product's practicality and convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

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

[0039] Figure 2 It is an exploded schematic diagram of the present invention;

[0040] Figure 3 This is a cross-sectional view of the present invention (foam mode);

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

[0042] Figure 5 It is a decomposition diagram of the gas replenishment structure. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0044] See also Figures 1 to 5 This embodiment provides a preferred implementation of a single-tube foam flushing and dual-purpose water gun.

[0045] like Figure 1 and Figure 2 As shown, the water gun of this embodiment mainly includes a gun body 1 as an operating body, a main control valve 2 arranged 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 a core function, a gun barrel 5 extending forward, and a nozzle 6 installed at the front end of the gun barrel 5.

[0046] The gun body 1 has a main channel 11 extending along its length for guiding the flow of external water (not shown). The main control valve 2 is preferably a trigger-type valve that is linked to the trigger on the gun body 1. The user can conveniently control the conduction and blocking of the main channel 11 by pulling or releasing the trigger.

[0047] In this embodiment, the foam supply assembly 3 specifically comprises a foam liquid storage bottle 31, removably mounted below the gun body 1 through threaded connections or other means, and a conduit 32 extending upward from the interior of the storage bottle 31. This removable design facilitates user refilling of the foam liquid or cleaning of the bottle at any time. Preferably, a fine mesh is provided at the lower end of the conduit 32.

[0048] The core spray switching mechanism 4 is integrated within the gun body 1 and connected in series with the main channel 11. Its function is to switch between pure water and foam modes within the single gun barrel 5. This mechanism comprises a valve chamber 41 and a valve core 42 that rotates within the chamber. The walls of the valve chamber 41 are formed with a water inlet 411, which connects upstream to the main channel 11, and a water outlet 412, which connects downstream to the gun barrel 5.

[0049] The valve core 42 is a key component for achieving mode switching. It is equipped with 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 in the valve chamber 41 by turning the knob 43.

[0050] In order to achieve two different injection modes, two independent fluid paths are designed on the valve core 42:

[0051] The first water channel 421 is a channel that runs transversely through the valve core 42 and is used for the foam mode.

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

[0053] Furthermore, a foam inlet channel 422 for drawing in foam liquid and an air inlet channel 424 for drawing in air are connected to the first water channel 421 via a Venturi structure. 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 sealing, 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 always maintain a close fit with the inner wall of the valve cavity 41 when the valve core 42 rotates.

[0055] The water gun combines the foam spraying and the water spraying into one, sharing a water outlet gun barrel, which greatly reduces the volume and mass occupied by the gun barrel. It not only facilitates the user experience, but also makes its structure simpler and clearer, thereby reducing cost expenditure.

[0056] The following combination Figure 3 and Figure 4 Detailed description of the working process of this water gun:

[0057] 1) Bubble mode (such as Figure 3 shown)

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

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

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

[0061] At this point, the user pulls the trigger, and high-pressure water rushes from the water inlet 411 into the first water channel 421. Due to the Venturi structure, the water flow is accelerated within the channel, creating a localized negative pressure at the openings of the foam inlet channel 422 and the air inlet channel 424. This negative pressure generates a powerful 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 ambient air through the air inlet channel 424. The water, foam liquid, and air are intensely mixed and agitated within the first water channel 421, forming a rich, dense foam that is ultimately ejected through the water outlet 412, the barrel 5, and the nozzle 6.

[0062] 2) Pure water mode (such as Figure 4 shown)

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

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

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

[0066] At this point, the user pulls the trigger, and high-pressure water flows in through the water inlet 411, flows directly through the second water channel 423, which acts as a bypass, and then flows out through the water outlet 412, entering the barrel 5 and nozzle 6. During this entire process, the water flow completely bypasses the first water channel 421 that generates foam, thereby spraying out pure high-pressure water, achieving a thorough and residue-free mode switching.

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

[0068] Linkage type air supply structure (please refer to Figure 5 )

[0069] To address the issue of negative pressure within the storage bottle 31 during aspiration, which can make subsequent aspiration difficult, this embodiment incorporates an air supply mechanism on the gun body 1 that is linked to mode switching. This mechanism includes an air supply hole 12 connecting the interior of the storage bottle 31 with the outside atmosphere, and a valve stem 33 that moves up and down within the hole to open and close. A sealing plug 34 is attached to the valve stem 33, which is continuously biased upward by an elastic return element 35 (e.g., a spring), which normally tends to block the air supply hole 12.

[0070] The linkage is achieved by a special design of the bottom surface of the knob 43 - an arcuate track 431 with a guide ramp 4311. The height of the ramp gradually increases from one end to the other. The upper end of the valve stem 33 always elastically abuts against the guide ramp.

[0071] When the knob 43 is in the foam mode position (eg Figure 3 ), the upper end of the valve stem 33 corresponds to the lower portion of the track 431. The guide ramp 4311 pushes the valve stem 33 downward, overcoming the elastic force of the elastic return member 35. The valve stem 33 moves downward, and the sealing plug 34 on it separates from the air injection hole 12, opening the air injection hole. This way, whenever foam liquid is drawn out, outside air is immediately replenished into the bottle, maintaining a balanced internal and external pressure and ensuring smooth foam extraction.

[0072] When the knob 43 is turned to the pure water mode position (such as Figure 4), the upper end of the valve stem 33 slides to the higher point of the track 431. Under the action of the elastic return member 35, the valve stem 33 moves upward, allowing the sealing plug 34 to tightly seal the air injection hole 12. This effectively prevents the foam liquid in the storage bottle from shaking and leaking out of the air injection hole when in non-foaming mode or during transportation.

[0073] Swingable nozzle and damping positioning mechanism

[0074] To clean areas that are difficult to reach with traditional linear water guns, the nozzle 6 of this embodiment is connected to the front end of the barrel 5 via a pivot and can swing up and down 180 degrees. To ensure that the nozzle 6 can maintain a stable angle after adjustment and avoid being changed by the impact of the water flow, a rotation damping mechanism is also provided at the connection.

[0075] The mechanism preferably includes a first rotating disk 61 and a second rotating disk 62 that can rotate relative to each other. A circle 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 mounted 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 "jumps" between the positioning grooves. Each time it engages a positioning groove, a clear segment is generated and sufficient friction and positioning force are provided to keep the nozzle stable at any selected angle.

[0076] Positioning and limiting of mode switching

[0077] To ensure 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 comprises a second spring plunger 432 mounted on the gun body 1 and two positioning grooves 433 provided at corresponding positions on the bottom surface of the knob 43. When the knob 43 is turned to the precise position for foam mode or pure water mode, the head of the spring plunger 432 clicks into the corresponding groove, providing the user with clear tactile feedback.

[0078] To prevent damage to internal components caused by excessive rotation, a limiting structure is provided between the valve core 42 and the gun body 1. For example, a bump 427 is provided on the valve core 42, and a fan-shaped limiting groove 13 is provided at a corresponding position on the gun body 1. The bump 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 adopts an extended gun barrel, which increases the cleaning distance, so that cleaning can be achieved at distances that are not accessible to some people.

[0080] In summary, the present invention successfully achieves complete separation and rapid switching between pure water and foam modes within a single tube structure by providing a rotatable valve core integrated with two independent water paths (a first water channel and a second water channel) in a single main channel. Compared to existing technologies, this solution features a highly integrated structure, significantly reducing the volume 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 swingable nozzle with damping positioning greatly enhance the product's practicality and user experience.

Claims

1. A single-tube foam flushing dual-purpose water gun, characterized in that: include: A gun body (1) is provided with a main passage (11) therethrough; A main control valve (2) is provided on the gun body (1) and is used to control the opening and closing of the main channel (11); A foam supply assembly (3), connected to the gun body (1), for storing and supplying foam liquid; The spray switching mechanism (4) is used for selectively switching between a pure water mode and a foam mode during use, and the spray switching mechanism (4) comprises: A valve cavity (41) is provided in the main channel (11) and cuts off the main channel. A water inlet (411) and a water outlet (412) are provided on the side wall of the valve cavity (41); A valve core (42) is rotatably disposed in the valve cavity (41), and the valve core (42) is provided with: a knob (43), which is connected to the valve core (42) and at least partially extends out of the gun body (1), and is used to drive the valve core (42) to rotate; a first water channel (421); a foam inlet channel (422), one end of which is in communication with the foam supply assembly (3), and the other end of which is in communication with the first water channel (421) via a venturi structure; a second water channel (423) which is independent of the first water channel (421); Wherein, by rotating the knob (43), the valve core (42) has at least two preset rotation positions: Foam mode position: when the valve core (42) is in this position, the two ends of the first water channel (421) thereon are aligned and communicated with the water inlet (411) and the water outlet (412) of the valve cavity (41), respectively, so that the water flowing through the first water channel (421) can absorb and mix the foam liquid through the Venturi structure to form a foam water flow for spraying; Pure water mode position: When the valve core (42) is in this position, the first water channel (421) thereon is staggered with the water inlet (411) and the water outlet (412), and at the same time the second water channel (423) is connected with the main channel (11) to guide the water flow to bypass the first water channel (421) and flow directly through, forming a pure water flow spray.

2. The single-tube foam flushing dual-purpose water 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 connected to the outside atmosphere, and the other end of which is connected to the first water channel (421) via another Venturi structure.

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

4. The single-tube foam flushing dual-purpose water 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 both ends of the first water channel (421), respectively, which can be tightly fitted with the inner wall of the valve cavity (41) to seal.

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

6. The single-tube foam-flushing dual-purpose water gun according to claim 5, characterized in that: The gun body (1) is also provided with an air supply 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. The single-tube foam-flushing dual-purpose water gun according to claim 6, characterized in that: The air supply structure comprises an air supply hole (12) provided on the gun body (1), the air supply hole (12) communicating with the interior of the foam liquid storage bottle (31) and the outside atmosphere, a valve stem (33) capable of being raised and lowered is inserted into the air supply hole (12), a sealing plug (34) for selectively blocking the air supply hole (12) and an elastic reset member (35) for driving the valve stem (33) to reset toward a blocked position are provided on the valve stem (33); an arc-shaped track (431) is provided on the bottom surface of the knob (43), a guide slope (4311) gradually rising from one end to the other end is provided on the track (431), and the upper end of the valve stem (33) abuts against the guide slope (4311); When the knob (43) is rotated to the foam mode position, the upper end of the valve stem (33) is located at the lower part of the guide slope (4311), so that the sealing plug (34) is separated from the air supply hole (12); when the knob (43) is rotated 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 up by it, overcoming the elastic force of the elastic reset member (35), so that the sealing plug (34) blocks the air supply hole (12).

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

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

10. The single-tube foam-flushing dual-purpose water 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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