Liquid line switching valve

Abstract

The utility model discloses a kind of liquid pipeline switching valve, including several liquid inlets, a liquid outlet and switching device, several liquid inlets can be communicated to liquid outlet by switching device, switching device is configured to can switch and select the liquid inlet needing to be connected or close all liquid inlets, any liquid inlet and switching device are in communication state, other liquid inlets and switching device are in closed state. The present application is by setting switching device between several liquid inlets one liquid outlet, any liquid inlet and liquid outlet can be selectively connected by switching device, realize the switching function of one liquid outlet corresponding multiple liquids, without replacing liquid storehouse or preparing multiple equipment, it can adapt to the demand of user multiple liquid alternate use, significantly improve operation convenience. Compared with the design of multiple pump, multiple waterway, the switching valve only needs to realize the pipeline switching of multiple liquid storehouse by a set of switching device, directly reduces production cost, simplifies internal structure, substantially improves space utilization.

Description

Technical Field

[0001] This utility model belongs to the field of fluid control device technology, specifically relating to a liquid pipeline switching valve. Background Technology

[0002] In various fields such as home and bathroom, industrial production, and medical care, the need for alternating use of different types of liquids, such as cleaning agents, reagents, and care solutions, is becoming increasingly common. However, existing liquid switching devices are limited by their structural design, all of which suffer from a core contradiction between function and cost, as well as size. For example, in home scenarios, the shampoo and shower gel dispensing devices of bathroom bubble machines, the laundry detergent and fabric softener dispensing devices of laundry equipment, and the dispensing devices of kitchen dishwashing liquid and fruit and vegetable cleaners all face similar technical bottlenecks. In the aforementioned scenarios, when using a single liquid tank, users need to frequently pour and change different liquids, which is time-consuming and prone to residual contamination. When using multiple liquid tanks, each liquid tank needs to be equipped with a separate micro-pump or independent diversion pipe, which increases the equipment's production cost. At the same time, the internal structure is complex and occupies a large space, making it difficult to adapt to the installation requirements of small-scale home appliances.

[0003] In addition, chemical reagent dosing equipment in industrial production and small liquid dispensers in medical care scenarios also suffer from the same problems: insufficient single-liquid-tank functionality and high cost and large size of multi-liquid-tank systems.

[0004] In summary, there is an urgent need for a technical solution that can balance multi-liquid switching, low cost, and simplified structure. Summary of the Invention

[0005] To address the above problems, this application designs a liquid pipeline switching valve, which aims to solve the problems pointed out in the background art.

[0006] To achieve the above objectives, this application provides a liquid pipeline switching valve, including a plurality of liquid inlets, a liquid outlet, and a switching device. The plurality of liquid inlets can all flow to the liquid outlet through the switching device. The switching device is configured to switch between selecting the liquid inlets to be connected or to close all liquid inlets. When any liquid inlet is connected to the switching device, the other liquid inlets are closed to the switching device.

[0007] Preferably, the switching device includes a central tube with a steering gear connected to its body. The steering gear and the central tube share the same shaft. The central tube also has a central tube inlet and a central tube outlet. The central tube inlet can be connected to several liquid inlets by rotating the steering gear, and the central tube outlet is connected to the liquid outlet. When the steering gear rotates, the central tube rotates synchronously and switches the pipeline direction.

[0008] Preferably, it also includes an auxiliary gear, a motor, a controller, and a power supply. The motor is electrically connected to the controller and the power supply. The controller can control the circuit switching. The auxiliary gear meshes with the steering gear. The motor can drive the auxiliary gear to rotate, thereby driving the steering gear to rotate to a preset position.

[0009] Preferably, it further includes at least one rotating auxiliary component disposed in the central tube, the rotating auxiliary component being disposed between the outlet of the central tube and the liquid outlet.

[0010] Preferably, the rotating auxiliary component is configured as either a bearing or a roller.

[0011] Preferably, a sealing ring is provided between the inlet of the central tube and the plurality of liquid inlets, and a sealing ring is provided between the outlet of the central tube and the liquid outlet.

[0012] Preferably, the switching device is provided with an alignment structure, which is configured as follows:

[0013] When the steering gear rotates to the point where the central pipe inlet connects with any of the liquid inlets, the alignment structure provides sensory feedback.

[0014] Preferably, it also includes a housing that encloses at least a portion of the liquid line switching valve.

[0015] Preferably, it also includes a plurality of liquid storage tanks, wherein the plurality of liquid storage tanks correspond in number and interface to the plurality of liquid inlets.

[0016] Preferably, it also includes a liquid extraction device, which is configured as either a venturi tube or a liquid extraction pump.

[0017] The beneficial effects of this application are:

[0018] This application's liquid pipeline switching valve incorporates a switching device between several inlets and one outlet. This switching device allows for selective connection between any inlet and outlet, enabling a single outlet to handle multiple liquids. This design eliminates the need to replace liquid tanks or prepare multiple devices, adapting to users' requirements for alternating use of multiple liquids, significantly improving operational convenience. Furthermore, compared to designs with multiple pumps and water channels, this switching valve requires only one switching device to achieve pipeline switching across multiple liquid tanks, eliminating the need for additional pumps or independent water channels. This directly reduces production costs, simplifies the internal structure, and greatly improves space utilization. Attached Figure Description

[0019] Figure 1 This is an exploded structural diagram of the liquid pipeline switching valve according to an embodiment of this application;

[0020] Figure 2This is a schematic diagram of the overall structure of the liquid pipeline switching valve in an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the assembly of the liquid pipeline switching valve and the venturi tube according to an embodiment of this application;

[0022] Figure 4 This is an exploded structural diagram of the liquid pipeline switching valve and venturi tube according to an embodiment of this application;

[0023] Figure 5 This is a cross-sectional schematic diagram of the assembly of the liquid pipeline switching valve and the venturi tube in an embodiment of this application (the inlet of the central pipe is connected to the first liquid inlet);

[0024] Figure 6 This is a cross-sectional schematic diagram of the assembly of the liquid pipeline switching valve and the venturi tube in an embodiment of this application (the inlet of the central pipe is connected to the second liquid inlet);

[0025] Figure 7 This is a schematic diagram of the assembly of the liquid pipeline switching valve and the liquid pump in an embodiment of this application.

[0026] The annotations in the attached figures are explained as follows:

[0027] 1-Inlet; 11-First inlet; 12-Second inlet; 2-Outlet;

[0028] 3-Switching device; 31-Central pipe; 32-Steering gear; 33-Central pipe inlet; 34-Central pipe outlet; 35-Auxiliary gear; 36-Motor; 37-Rotation auxiliary component; 38-Power supply;

[0029] 4-Outer shell; 41-Front cover; 42-Rear cover;

[0030] 5-Liquid extraction device. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. It should be understood that this application is not limited to the exemplary embodiments disclosed herein. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0035] Example 1

[0036] Reference Appendix Figure 1 , 4 This embodiment provides a liquid pipeline switching valve, including several inlet ports 1, one outlet port 2, and a switching device 3. The several inlet ports 1 can all flow to the outlet port 2 through the switching device 3. The switching device 3 is configured to switch and select the inlet ports 1 that need to be connected or close all inlet ports 1. When any inlet port 1 is connected to the switching device 3, the other inlet ports 1 and the switching device 3 are all closed.

[0037] The number of inlets 1 can be several, that is, two or more inlets 1 (including two). For example, it can include two inlets 1, namely the first inlet 11 and the second inlet 12. The size and interface type of the inlets 1 do not affect the protection range, as long as they can connect to the external liquid tank. The arrangement of the inlets 1 can be circular or linear. The position of the outlet 2 is not limited, as long as the basic structural principle of "multiple inlets and single outlet" is met.

[0038] The switching device 3 refers to all structures that can selectively connect the inlet 1 and the outlet 2, including but not limited to mechanical switching mechanisms, such as rotary valve cores and slide valves; and electromagnetic control mechanisms, such as solenoid valve groups.

[0039] The switching device 3 has an interlocking mechanism that ensures the absolute closure of all other inlets 1 when it is connected to any one of the inlets 1. The switching device 3 also has a structure that simultaneously closes all inlets 1, meaning it can selectively connect to any one of the inlets 1 or not connect to any of them. The switching device 3 can employ different interlocking principles, such as mechanical limiting or electromagnetic interlocking; any method that prevents liquid mixing is acceptable.

[0040] Furthermore, a sealing ring is provided between the central tube inlet 33 and several liquid inlets 1, and a sealing ring is provided between the central tube outlet 34 and the liquid outlet 2. The sealing rings can also be wear-resistant and chemically resistant, or integrate lubrication functions, such as sealing rings with a silicone grease coating to reduce rotational friction. Multiple sealing rings can also be used in the design to enhance the leak-proof effect.

[0041] Furthermore, the switching device 3 is equipped with an alignment structure, which is configured such that when the steering gear 32 rotates to the point where the central pipe inlet 33 connects with any liquid inlet 1, the alignment structure provides sensory feedback.

[0042] Sensory feedback includes perceptible acoustic feedback, such as clicking or buzzing sounds, or tactile feedback, such as the feel of a knob clicking or vibration, or visual feedback, such as color alignment or color change. The timing of the feedback is synchronized with the precise alignment of the central tube inlet 33 with any liquid inlet 1, and the intensity of the feedback is not limited.

[0043] In this specific embodiment, a mechanical structure can be used, such as a "pawl-slot," "protrusion-groove," or "ball-positioning hole" alignment structure. In other embodiments, an electronic alignment structure can also be used, such as a "Hall sensor + magnet," "photoelectric switch + light shield," or "electromagnetic positioning pin + inductive switch" alignment structure.

[0044] The principle of the "pawl-slot" alignment structure is as follows: When the steering gear 32 rotates, it drives the central tube 31 to rotate synchronously, causing the central tube inlet 33 to gradually approach a certain liquid inlet 1. The slot of the central tube 31 or the steering gear 32 rotates to below the pawl. Under the action of the return spring, the end of the pawl falls into the slot, producing a mechanical locking sensation. Simultaneously, the end collidees with the slot wall, producing a "click" sound. At this point, the central tube inlet 33 and the liquid inlet 1 are completely aligned, completing the alignment. To switch to the next liquid inlet 1, the steering gear 32 is continuously rotated. The pawl is compressed by the slot side wall, disengaging from the current slot and sliding to the next slot, repeating the above process.

[0045] The principle of the "protrusion-groove" alignment structure is as follows: when the steering gear 32 rotates, the protrusion of the central tube 31 or the steering gear 32 moves in a circular motion with the rotating shaft. When the central tube inlet 33 approaches the liquid inlet 1, the protrusion gradually slides into the groove. The moment the protrusion slides into the groove, the rotational resistance suddenly decreases, producing a slight "feeling of positioning," and a "click" sound is made when the protrusion contacts the edge of the groove. At this time, the central tube inlet 33 is precisely aligned with the liquid inlet 1. If rotation continues, the protrusion is squeezed by the other edge of the groove and slides out of the groove, entering the next sliding stroke.

[0046] The principle of the "ball-positioning hole" alignment structure is as follows: when the steering gear 32 rotates, the end face of the central tube 31 or the steering gear 32 is in continuous contact with the ball. Under the action of the spring, the ball always stays close to the end face of the gear, generating stable sliding friction. When the central tube inlet 33 approaches the liquid inlet 1, the positioning hole of the steering gear 32 rotates to directly below the ball. With further rotation, the ball is inserted into the positioning hole under the spring force, the rotational resistance drops sharply, and the sliding friction changes to the "ball embedded" positioning state, producing a noticeable jerking sensation. The ball hits the bottom of the positioning hole and makes a "click" sound. After alignment, if switching is required, the gear is continuously rotated, and the side wall of the positioning hole pushes the ball to compress the spring, causing the ball to disengage from the hole and return to the sliding state.

[0047] The principle of the "Hall sensor + magnet" alignment structure is as follows: After the controller is powered on, the Hall sensor enters the detection state and outputs a voltage signal in real time. When the steering gear 32 rotates, the magnet moves with the gear. When the magnet approaches the Hall sensor, the sensor is affected by the magnetic field, and the output signal changes from high level to low level (or vice versa, depending on the sensor type). The controller receives the signal change and determines that "the magnet is in position," that is, the inlet 33 of the central tube is aligned with the corresponding liquid inlet 1. The controller immediately triggers the feedback module, which can trigger a buzzer to emit a prompt sound or the micro vibration motor 36 to vibrate. During switching, the gear continues to rotate, the magnet moves away from the sensor, the signal returns to its initial state, the feedback stops, and it waits for the next magnet detection.

[0048] The alignment structure of "photoelectric switch + light shield" and "electromagnetic positioning pin + inductive switch" adopts the existing technology and will not be described in detail here.

[0049] The method of using this application is as follows:

[0050] Based on the number of liquid types requiring switching, connect each liquid container to several inlet ports 1, ensuring that each inlet port 1 corresponds to a unique liquid type. Connect the outlet port 2 of the liquid pipeline switching valve to the end-use equipment, such as the foam generating component of a bubble machine or the liquid dosing pump of industrial equipment. When a specific liquid is needed, the inlet 33 of the central tube can be switched manually or automatically to the corresponding inlet port 1. Other unused inlet ports 1 are mechanically blocked or electronically shut off to achieve sealing. When changing the liquid, repeat the "switching trigger - interlock confirmation" step.

[0051] Example 2

[0052] In this embodiment, refer to the appendix Figures 1-7 A specific switching device 3 is provided. The switching device 3 includes a central pipe 31. A steering gear 32 is connected to the body of the central pipe 31. The steering gear 32 and the central pipe 31 have the same rotating shaft. The central pipe 31 is also provided with a central pipe inlet 33 and a central pipe outlet 34. The central pipe inlet 33 can be connected to several liquid inlets 1 by rotating the steering gear 32. The central pipe outlet 34 is connected to a liquid outlet 2. When the steering gear 32 rotates, the central pipe 31 rotates synchronously and switches the pipeline direction.

[0053] The central tube 31 refers to a tube structure with a hollow channel. Its material is not limited; for example, it can be made of plastic, metal, rubber, silicone, etc. The cross-sectional shape is not limited, as long as it can achieve the flow guidance path. The connection between the central tube 31 and the steering gear 32 can be integrated or separate. In a separate design, the steering gear 32 and the central tube 31 can be fixed by any method such as key connection, interference fit, snap-fit, or welding. The tube body can be equipped with auxiliary structures such as reinforcing ribs and sealing grooves, all without affecting the protection range.

[0054] The coaxiality of the steering gear 32 and the central tube 31 means that the rotation center of the steering gear 32 and the axis of the central tube 31 are completely coincident, ensuring that the two rotate synchronously. The type and tooth profile parameters of the steering gear 32 are not limited, as long as it can transmit rotational torque.

[0055] The central tube inlet 33 is rotatably connected to the liquid inlet 1. The liquid inlet 1 is arranged around the circumference of the central tube 31. The connection and sealing between the central tube inlet 33 and the liquid inlet 1 can be achieved by using a sealing ring or a precision clearance fit.

[0056] The outlet 34 of the central tube is connected to the outlet 2. The two can be connected by direct insertion, threaded connection, rotary joint, etc., as long as a single outlet can be continuously guided.

[0057] The driving method of steering gear 32 is not limited. It can be driven by manual rotation, gear meshing of motor 36, etc. During the transmission process, a deceleration mechanism and a positioning mechanism (such as ratchet positioning) can be added to optimize the switching accuracy, which is still within its own protection scope.

[0058] The steering gear 32 is also replaced by meshing transmission components such as synchronous belt pulleys and sprockets. Both are based on the principle of meshing to transmit rotational torque and achieve the same function of driving the central tube 31 to rotate, and are still within their own protection scope.

[0059] The single-hole design of the central tube inlet 33 can be configured as a "multi-hole array". This "multi-hole array" only connects to one liquid inlet 1, which means that the central tube inlet 33 is divided into several smaller holes. A filter screen or other structure can also be added to the central tube inlet 33 to prevent blockage inside the tube.

[0060] The usage method of this embodiment is as follows: The user rotates the steering gear 32 manually or electrically. The steering gear 32 coaxially drives the central tube 31 to rotate synchronously. The central tube inlet 33 gradually aligns with the target liquid inlet 1 from its initial position as it rotates. Once the central tube inlet 33 is aligned with the first liquid inlet 11, for example... Figure 5 As shown, when the terminal device (such as the liquid pump of a bubble machine) is started, the liquid enters the internal channel of the central tube 31 from the first inlet 11, and is then transported to the terminal through the central tube outlet 34, completing the usage. To switch to another inlet, such as the second inlet 12, the aforementioned steps are repeated, ultimately as shown... Figure 6 As shown.

[0061] When connected to any inlet 1, the other inlets 1 and the switching device 3 are all in a closed state. Specifically, an annular sealing platform is provided on the outer wall of the central tube 31 at the position corresponding to the inlet 1. When the inlet 33 of the central tube is aligned with a certain inlet 1, the annular sealing platform on the outer wall of the central tube 31 will block and seal the other inlets 1, forming a physical blockage.

[0062] Example 3

[0063] Reference Appendix Figure 1 , 4 -6. Based on Embodiment 2, this embodiment further clarifies the transmission method. Specifically, the liquid pipeline switching valve also includes an auxiliary gear 35, a motor 36, a controller, and a power supply 38. The motor 36 is electrically connected to the controller and the power supply 38. The controller can control the circuit on and off. The auxiliary gear 35 meshes with the steering gear 32. The motor 36 can drive the auxiliary gear 35 to rotate, thereby driving the steering gear 32 to rotate to a preset position.

[0064] Among them, the auxiliary gear 35 refers to the gear structure that meshes with the steering gear 32. As a torque transmission medium, it is not limited by gear type, tooth profile parameters, or material, as long as it can realize the meshing transmission between the motor power and the steering gear 32.

[0065] It should be noted that the steering gear 32 and the auxiliary gear 35 can be replaced by a synchronous belt drive, which is still an equivalent replacement and falls within the protection scope of this application. The connection between the auxiliary gear 35 and the motor shaft 36 can be integrally formed or a separate design.

[0066] The motor 36 used in this application adopts the technology in the prior art and is an electrical component used to output rotational power. There are no restrictions on the type of motor, power specifications, etc., as long as the output torque can drive the transmission system.

[0067] The controller used in this application adopts existing technology and is an electrical module used to realize circuit on / off control. Its core functions are "instruction storage, execution and motor start / stop and direction control". There are no restrictions on the type of controller or control method, as long as it can respond to instructions and drive the motor 36.

[0068] The power supply 38 used in this application adopts the technology in the prior art and is a device that provides electrical energy to the motor 36 and the controller. It is not limited to the type of power supply, such as a disposable battery, a rechargeable battery, or an AC power supply, as long as the voltage and output power match the load requirements.

[0069] Example 4

[0070] Reference Appendix Figure 1 , 4 -6. Based on Embodiment 2, this embodiment further includes at least one rotating auxiliary component 37 disposed in the central tube 31. The rotating auxiliary component 37 is disposed between the outlet 34 of the central tube and the outlet 2.

[0071] The installation space of the rotating auxiliary component 37 is located between the outer wall or end face of the outlet 34 of the central tube and the outer wall or end face of the outlet 2. The rotating auxiliary component 37 can reduce the direct friction between the central tube 31 and the outlet 2 when rotating through its own structure (such as rolling or sliding), thereby reducing rotational resistance, avoiding jamming, and extending the service life of the component.

[0072] Furthermore, the rotating auxiliary component 37 can also serve a sealing function; for example, a sealing ring can be installed on the rotating auxiliary component 37 to reduce friction and prevent leakage. In this embodiment, the rotating auxiliary component 37 is specifically configured as either a bearing or a roller.

[0073] Example 5

[0074] In this embodiment, refer to the appendix Figure 1-7It also includes a housing 4, which encloses at least a portion of the liquid pipeline switching valve. The housing 4 refers to an enclosure component with a certain structural strength, which can be further configured to have auxiliary functions such as waterproofing, dustproofing, and corrosion resistance. The housing 4 is not limited in material or shape and can be made of plastic, metal, or composite materials.

[0075] The outer casing 4 can enclose key components of the liquid pipeline switching valve, such as the switching device 3, the connection between the inlet 1 and the central pipe 31. It can be configured to partially enclose the components, such as only enclosing the switching device 3, leaving the inlet 1 and outlet 2 exposed for easy connection; or it can be configured to fully enclose the components, leaving only the interface opening.

[0076] The outer casing 4 can be integrally formed or configured as a split assembly casing 4, such as a front and rear cover snap-fit ​​structure, including a front cover 41 and a rear cover 42, which facilitates disassembly and maintenance. The outer casing 4 can be configured as an outer casing 4 with an observation window, and the transparent window facilitates viewing the internal switching status.

[0077] Example 6

[0078] To accommodate installation in initial devices that do not have a liquid storage function, this embodiment also includes several liquid storage tanks, with the number and interface corresponding to several liquid inlets 1. The outlet interface of the liquid storage tank is structurally compatible with the liquid inlet 1. The liquid storage tank may be equipped with auxiliary structures, such as a liquid level observation window, graduation lines, a filling port cover, an anti-backflow valve, and a liquid level sensor.

[0079] Furthermore, to adapt to installation in initial devices that do not have a liquid extraction function, this embodiment also includes a liquid extraction device 5, see attached drawing. Figure 3 , 7 The liquid extraction device 5 is configured as either a venturi tube or a liquid extraction pump.

[0080] Both venturi tubes and liquid pumps can utilize existing technologies. A venturi tube refers to a fluid dynamic component that achieves liquid extraction through the Venturi effect. Liquid extraction is achieved by generating negative pressure in the throat using high-speed fluid. There are no restrictions on material, size, or installation location, as long as the extraction is based on the Venturi effect. A liquid pump refers to a power component that achieves liquid transport through mechanical or electromagnetic drive. There are no restrictions on type, such as gear pumps, diaphragm pumps, peristaltic pumps, or centrifugal pumps. There are no restrictions on drive method or power, as long as it can actively extract liquid and maintain flow.

[0081] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0082] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A liquid pipeline switching valve, characterized in that, It includes several liquid inlets, one liquid outlet, and a switching device. The liquid inlets can all flow to the liquid outlet through the switching device. The switching device is configured to switch between selecting the liquid inlets to be connected or to close all liquid inlets. When any liquid inlet is connected to the switching device, the other liquid inlets are closed to the switching device.

2. A liquid pipeline switching valve according to claim 1, characterized in that, The switching device includes a central tube with a steering gear connected to its body. The steering gear and the central tube share the same shaft. The central tube also has a central tube inlet and a central tube outlet. The central tube inlet can be connected to several liquid inlets by rotating the steering gear, and the central tube outlet is connected to the liquid outlet. When the steering gear rotates, the central tube rotates synchronously and switches the pipeline direction.

3. A liquid pipeline switching valve according to claim 2, characterized in that, It also includes an auxiliary gear, a motor, a controller, and a power supply. The motor is electrically connected to the controller and the power supply. The controller can control the circuit to open and close. The auxiliary gear meshes with the steering gear. The motor can drive the auxiliary gear to rotate, thereby driving the steering gear to rotate to a preset position.

4. A liquid pipeline switching valve according to claim 2, characterized in that, It also includes at least one rotating auxiliary component disposed in the central tube, the rotating auxiliary component being disposed between the outlet of the central tube and the liquid outlet.

5. A liquid pipeline switching valve according to claim 4, characterized in that, The rotating auxiliary component is configured as either a bearing or a roller.

6. A liquid pipeline switching valve according to claim 2, characterized in that, A sealing ring is provided between the inlet of the central tube and the plurality of liquid inlets, and a sealing ring is provided between the outlet of the central tube and the liquid outlet.

7. A liquid pipeline switching valve according to claim 2, characterized in that, The switching device is provided with an alignment structure, which is configured as follows: When the steering gear rotates to the point where the central pipe inlet connects with any of the liquid inlets, the alignment structure provides sensory feedback.

8. A liquid pipeline switching valve according to claim 1, characterized in that, It also includes a housing that encloses at least a portion of the liquid line switching valve.

9. A liquid pipeline switching valve according to claim 1, characterized in that, It also includes several liquid storage tanks, and the number and interface of the several liquid storage tanks correspond to the number of several liquid inlets.

10. A liquid pipeline switching valve according to claim 1, characterized in that, It also includes a liquid extraction device, which is configured as either a venturi tube or a liquid extraction pump.

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