One-way valve, blowdown system and cleaning equipment

Abstract

The utility model discloses a one-way valve, a blowdown system and cleaning equipment. A valve nozzle (110) of the one-way valve (100) is nonlinear, a turbulent flow channel (111) is arranged in the valve nozzle (110), an attached lip edge (112) is arranged at the tail end of the valve nozzle (110), and the lip edge (112) is located at an outlet of the turbulent flow channel (111).

Description

Technical Field

[0001] The present application belongs to the field of cleaning technology, and specifically relates to a one-way valve, a sewage discharge system and cleaning equipment. Background Art

[0002] A one-way valve is a fluid control element whose main function is to control the flow of liquid in one direction only, but not in the opposite direction. A duckbill valve is a type of one-way valve, commonly known as a rubber sewage check valve, also known as a back-pressure flexible check valve, which is widely used in hydraulic systems, sewage systems, household cleaning equipment (such as automatic sweepers, sweeping robots, etc.) and other fields.

[0003] In the prior art, when a duckbill valve is used in a pipeline environment requiring unidirectional flow or having a non-return function, the unidirectional or non-return function of the duckbill valve often fails, requiring frequent maintenance, which affects the user experience. Utility Model Content

[0004] In order to solve the current technical problem of duckbill valve failure, the present application provides a one-way valve, a cleaning assembly and a cleaning device.

[0005] In a first aspect of the present application, a one-way valve is provided for use in cleaning equipment, wherein a valve mouth of the one-way valve is non-linear, a turbulence channel is provided inside the valve mouth, a fitting lip is provided at the end of the valve mouth, and the lip is located at the outlet of the turbulence channel.

[0006] In some embodiments, the valve mouth is an elastic valve mouth, so that when the fluid flows through the flow-turbulating channel, the valve mouth swings when switching between an open state and a closed state.

[0007] In some embodiments, the valve nozzle includes an inner valve plate and an outer valve plate.

[0008] In some embodiments, the thickness of the inner valve sheet is smaller than the thickness of the outer valve sheet.

[0009] In some embodiments, the thickness of the inner valve sheet of the valve nozzle is 0.3 mm to 2 mm, and the thickness of the outer valve sheet of the valve nozzle is 0.5 mm to 0.8 mm.

[0010] In some embodiments, a ratio of a thickness of an inner valve sheet of the valve nozzle to an outer valve sheet of the valve nozzle is 0.6 to 2.5.

[0011] In some embodiments, when the valve mouth is in an open state, the fluid flowing through the flow-turbulating channel has a flow velocity component along the radial direction of the one-way valve.

[0012] In some embodiments, the shape of the valve nozzle is at least one of an arc shape, a U shape, and a broken line shape.

[0013] In some embodiments, the valve mouth is arc-shaped, and the outer diameter of the valve mouth is 1.2 mm to 15 mm.

[0014] In some embodiments, the gap between the two lip pieces of the lip edge is no more than 0.1 mm or the two lip pieces are arranged in close proximity.

[0015] In some embodiments, the one-way valve comprises the valve nozzle and a body; the difference between the wall thickness of the valve nozzle and the wall thickness of the body is no more than 0.1 mm;

[0016] In some embodiments, the valve nozzle and the body are an integral structure.

[0017] A second aspect of the present application provides a sewage discharge system, comprising a pipeline, a pump and the one-way valve of the first aspect, wherein the one-way valve and the pump are both connected to the pipeline.

[0018] A third aspect of the present application provides a cleaning device, comprising the sewage discharge system of the second aspect or the one-way valve of the first aspect.

[0019] According to the one-way valve provided in the embodiment of the present application, it is applied to cleaning equipment. The valve mouth of the one-way valve is non-linear. During the process of opening the valve mouth, the flow disturbance channel has a non-linear shape, so the motion law of the fluid flowing through the flow disturbance channel is broken, which increases the disorder of the fluid in the flow disturbance channel. A fitting lip is provided at the end of the valve mouth, and the lip is located at the outlet of the flow disturbance channel. When the fluid moves from the flow disturbance channel to the outlet, the two fitting lips of the lip will open to allow the fluid to flow out from the lip. Since the motion law of the fluid flowing through the flow disturbance channel is broken, the particles in the fluid will not gather in the lip, thereby reducing the risk of failure of the one-way or check function of the one-way valve due to particles stuck in the lip, and meeting the function of long-term sewage discharge of the cleaning equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 An isometric view of a one-way valve in one or more embodiments of the present application is shown.

[0021] Figure 2 Shows Figure 1 Front view of the one-way valve.

[0022] Figure 3 Shows Figure 1 Right side view of the one-way valve.

[0023] Figure 4 Shows Figure 3 AA section view of the one-way valve.

[0024] Figure 5 A schematic diagram of the structure of a sewage discharge system in one or more embodiments of the present application is shown.

[0025] Description of reference numerals:

[0026] 100 - one-way valve, 110 - valve nozzle, 111 - flow disturbance channel, 112 - lip edge, 112a - lip plate, 113 - outer valve plate, 114 - inner valve plate, 120 - body, 121 - flow guide part, 122 - connecting part.

[0027] 200-pipeline, 300-pump. DETAILED DESCRIPTION

[0028] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0029] In the related art, when the duckbill valve is used in a pipeline environment that requires one-way flow and a pipeline environment with a check function, the liquid that needs to flow must not contain solid particles (sand or other impurities), or the content of solid particles is very low. If the content of particulate matter in the fluid is high, the duckbill valve is very likely to fail due to stuck particles. For example, when a sweeping robot enters the cleaning pile for cleaning, the dust particles swept by the sweeping robot will enter the cleaning system of the cleaning pile, making the duckbill valve of the cleaning system ineffective, requiring frequent maintenance, and affecting the user experience.

[0030] The first aspect of the present application provides a one-way valve, which can be applied to cleaning equipment, such as an automatic sweeping robot for household floor cleaning, a floor washing robot for floor cleaning in public places such as shopping malls and supermarkets, etc., and can reduce the failure problem of the duckbill valve due to the jamming of sand, gravel or other solid particles to a certain extent.

[0031] See also Figure 1 , shows a structural diagram of a one-way valve. The valve mouth 110 of the one-way valve 100 provided in the embodiment of the present application is non-linear, and the valve mouth 110 may be non-linear as a whole, or part of the valve mouth 110 may be non-linear. Figure 2 as well as Figure 4 , a flow disturbance channel 111 is provided in the valve mouth 110. Since the valve mouth 110 is non-linear, at least a portion of the corresponding flow disturbance channel 111 is non-linear. A fitting lip 112 is provided at the outlet of the valve mouth 110. The lip 112 is located at the outlet of the flow disturbance channel 111. After the fluid is discharged into the one-way valve 100, the two lip pieces 112a of the lip 112 will fit together, playing a role of preventing the fluid from returning.

[0032] During the opening of the valve mouth 110, the flow disturbance channel 111 is non-linear, that is, it is non-linear for at least a short period of time during the opening of the valve mouth 110, so the motion law of the fluid flowing through the flow disturbance channel 111 is broken, increasing the degree of disorder of the fluid in the flow disturbance channel 111. When the fluid moves from the flow disturbance channel 111 to the outlet, since the motion law of the fluid flowing through the flow disturbance channel 111 is broken, the particles in the fluid will not gather in the lip 112a, thereby reducing the risk of the one-way valve or the check function failing due to the lip 112a being stuck with particles, and meeting the function of long-term sewage discharge of the cleaning equipment.

[0033] To distinguish the two valve plates of the valve nozzle 110, refer to Figure 4 , hereinafter, the valve disc of the two valve discs closer to the body 120 of the one-way valve 100 is recorded as the inner valve disc 114, and the valve disc with a larger curvature radius is recorded as the outer valve disc 113. For example, if the valve mouth 110 is arc-shaped, the valve disc with a smaller curvature radius is the inner valve disc 114, and the valve disc with a larger curvature radius is the outer valve disc 113. The inner valve disc 114 and the outer valve disc 113 are connected to enclose a flow disturbance channel 111.

[0034] In some embodiments, the valve nozzle 110 is an elastic valve nozzle, and the elastic valve nozzle 110 can be a rubber valve nozzle or a silicone valve nozzle. The elastic valve nozzle has a tendency to restore its original shape, so that when the fluid flows through the flow disturbance channel 111, when the valve nozzle 110 switches between the open state and the closed state, both valve plates of the valve nozzle 110 swing. Specifically, when the fluid passes through the valve nozzle 110, the valve nozzle 110 opens, the outer valve plate 113 is compressed, and the inner valve plate 114 is stretched. The inner valve plate 114 and the outer valve plate 113 have different deformation rates when the fluid passes through.

[0035] Since the valve mouth 110 is elastic, when the valve mouth 110 switches from a closed state to an open state, the inner valve plate 114 and the outer valve plate 113 have a tendency to deform from a non-linear shape to a linear shape extending along the axial direction of the one-way valve 100 under the action of the fluid, and the inner valve plate 114 and the outer valve plate 113 swing and deform, and during the deformation process, the two lip plates 112a separate and open, and the fluid flows out of the one-way valve 100. During the process of the valve mouth 110 switching from an open state to a closed state, the fluid in the one-way valve 100 gradually decreases, and both the inner valve plate 114 and the outer valve plate 113 have a deformation tendency to return to their initial state. The swinging motion of the valve mouth 110 is transmitted to the fluid inside it, and also transmits the swinging motion to the particles in the fluid. The particles in the fluid are "thrown" out from between the two lip plates 112a during the swinging process; in addition, based on the different deformation rates of the inner valve plate 114 and the outer valve plate 113, the inner valve plate 114 and the outer valve plate 113 produce relative motion during the swinging process. This relative motion will increase the disorder of the fluid and the particles in the fluid, so that the particles in the fluid will not gather in the lip plate 112a, thereby reducing the risk of the lip plate 112a clamping the particles.

[0036] In some embodiments, when the valve mouth 110 is in an open state, the fluid flowing through the flow disturbance channel 111 has a flow velocity component along the radial direction of the one-way valve 100, that is, when the valve mouth 110 is in an open state, the valve mouth 110 is not fully straightened, and the valve mouth 110 and the axial direction of the one-way valve 100 still have an angle to ensure that the flow disturbance channel 111 is non-linear at any time, increase the degree of chaos of the fluid flowing through the flow disturbance channel 111, and reduce the risk of failure of the one-way valve 100 due to the jamming of sand or other solid particles. In other embodiments, the valve mouth 110 can be fully straightened when in an open state, that is, the valve mouth 110 extends along the axial direction of the one-way valve 100 in an open state. In the switching process of the valve mouth 110 from a closed state to an open state, or from an open state to a closed state, the flow disturbance channel 111 is non-linear.

[0037] The valve mouth 110 is an elastic valve mouth, which has a tendency to restore its original shape. When the lip 112 of the valve mouth 110 is opened, under the action of the fluid, the inner valve plate 114 and the outer valve plate 113 of the valve mouth 110 will change from a bent state to an axial extension of the valve mouth 110, resulting in a swing deformation. When the lip 112 of the valve mouth 110 is closed, the opened inner valve plate 114 and the outer valve plate 113 will return to the non-linear initial state, and the inner valve plate 114 and the outer valve plate 113 will swing back and deform, and twist in the radial direction. Therefore, even if the lip 112 is stuck with smaller particles, under the action of the radial twisting deformation of the inner valve plate 114 and the outer valve plate 113, the two layers of lip plates 112a will still fit tightly when the valve mouth 110 returns to the initial state to form a seal.

[0038] During the swing deformation process of the valve mouth 110, the deformation forms of the inner valve plate 114 and the outer valve plate 113 are different, the inner valve plate 114 is tensile deformation, and the outer valve plate 113 is compressive deformation. In some embodiments, the thickness of the inner valve plate 114 is not greater than the thickness of the outer valve plate 113, so that the valve mouth 110 is not completely straightened when in the open state, that is, it is still in a non-linear state. Among them, the thickness of the inner valve plate 114 is equal to the thickness of the outer valve plate 113, or the thickness of the inner valve plate 114 is less than the thickness of the outer valve plate 113.

[0039] In order to ensure that the valve nozzle 110 still has good strength during long-term frequent reciprocating swings, in some embodiments, the thickness of the inner valve plate 114 of the valve nozzle 110 can be 0.3mm-2mm, and the thickness of the outer valve plate 113 can be 0.5mm-0.8mm. For example, the thickness of the inner valve plate 114 can be 0.4mm, 0.6mm, 0.7mm, 0.9mm, 1mm, 1.2mm, 1.5mm, 1.6mm, 1.8mm or 1.9mm, and the thickness of the outer valve plate 113 can be 0.6mm, 0.7mm or 0.8mm, etc. In some embodiments, the thickness of the inner valve plate 114 is less than the thickness of the outer valve plate 113.

[0040] In order to further improve the strength of the valve mouth 110, in some embodiments, the ratio of the thickness of the inner valve plate 114 to the outer valve plate 113 is 0.6-2.5, for example, the ratio of the thickness of the inner valve plate 114 to the outer valve plate 113 is 0.7, 0.9, 1.1, 1.3, 1.5, 1.6, 1.8, 1.9, 2.0, 2.2, 2.3 or 2.4, etc.

[0041] In some embodiments, the shape of the valve nozzle 110 is at least one of an arc shape, a U shape, and a broken line shape. Figure 2 as well as Figure 4 , the shape of the valve nozzle 110 is an arc, or the shape of the valve nozzle 110 is a U-shape, or the shape of the valve nozzle 110 is a broken line. In some embodiments, the valve nozzle 110 includes two connected nozzle segments, one nozzle segment is one of an arc, a U-shape, and a broken line, and the other nozzle segment is one of an arc, a U-shape, and a broken line. In some embodiments, the valve nozzle 110 includes three nozzle segments connected in sequence, the first nozzle segment is one of an arc, a U-shape, and a broken line, the second nozzle segment is one of an arc, a U-shape, and a broken line, and the third nozzle segment is one of an arc, a U-shape, and a broken line. In some embodiments, the broken line-shaped valve nozzle 110 includes two nozzle segments, and the angle between the two nozzle segments can be 50°, 70°, 80°, 90°, etc. When the angle between the two nozzle segments is 90°, the shape of the valve nozzle 110 is L-shaped.

[0042] See also Figure 4In some embodiments, the valve nozzle 110 is in an arc shape, and the inner valve plate 114 and the outer valve plate 113 of the arc-shaped valve nozzle 110 have different curvature radii, which can gradually change the motion law of the fluid in the flow disturbance channel 111, reduce the kinetic energy loss of the fluid, and prevent local backflow. The outer diameter of the valve nozzle 110 can be 1.2 mm to 15 mm, that is, the outer diameter of the outer valve plate 113 can be 1.2 mm to 15 mm, for example, the outer diameter of the valve nozzle 110 can be 1.3 mm, 1.5 mm, 1.7 mm, 1.9 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm or 14 mm. In some embodiments, when the valve nozzle 110 is in an arc shape, the arc value of the valve nozzle 110 can be π, that is, a semicircle, or a arc value greater than π and less than 2π can be used, or a arc value less than π and greater than 0 can be used.

[0043] In some embodiments, the gap between the two lip pieces 112a of the lip edge 112 is no greater than 0.1 mm, or the two lip pieces 112a of the lip edge 112 can be arranged in close contact. In some embodiments, the two lip pieces 112a are partially arranged in close contact, and some other positions have a gap no greater than 0.1 mm.

[0044] In some embodiments, see Figure 1 The one-way valve 100 includes a valve nozzle 110 and a body 120; the difference between the wall thickness of the valve nozzle 110 and the wall thickness of the body 120 is not greater than 0.1 mm, and the valve nozzle 110 does not need to be stretched on the body 120, and can be obtained by integral molding through a mold, that is, the valve nozzle 110 and the body 120 are an integral structure, and the formed one-way valve 100 has high consistency. In some embodiments, the valve nozzle 110 and the body 120 are split structures, and the valve nozzle 110 and the body 120 can be integrally molded by a mold respectively, and then the valve nozzle 110 and the body 120 are connected by bonding.

[0045] In some embodiments, see Figure 2 as well as Figure 3 The body 120 includes a guide portion 121 and a connecting portion 122 which are sequentially arranged along the axial direction of the one-way valve 100 . The guide portion 121 is trumpet-shaped. The connecting portion 122 is used to be connected to a pipeline. The valve nozzle 110 is connected to a side of the guide portion 121 away from the connecting portion 122 .

[0046] The one-way valve 100 provided in the embodiment of the present application has at least the following advantages:

[0047] (1) The valve mouth 110 is non-linear. Therefore, when the valve mouth 110 is opened, the flow disturbance channel 111 is non-linear. The movement law of the fluid flowing through the flow disturbance channel 111 is broken, which increases the disorder of the fluid in the flow disturbance channel 111 and makes it difficult for particles to gather at the lip 112, thereby reducing the risk of particles being stuck on the lip 112a.

[0048] (2) When the valve mouth 110 is in an open state, the fluid in the flow disturbance channel 111 of the one-way valve 100 has a flow velocity component along the radial direction of the one-way valve 100, so that the fluid and the particles in the fluid change from moving along the axial direction of the one-way valve 100 to moving in the radial direction of the one-way valve 100, further increasing the disorder of the fluid and the particles in the fluid.

[0049] (3) The valve mouth 110 is an elastic valve mouth, which has a tendency to restore its original shape. The valve mouth 110 can swing when switching between the open state and the closed state. When the valve mouth 110 switches from the open state to the closed state, the swing of the valve mouth 110 causes the fluid and the particles in the fluid to be "thrown out". At the same time, the inner valve plate 114 and the outer valve plate 113 also have relative movement along the radial direction of the one-way valve 100, thereby reducing the risk of particles being stuck in the lip 112a. In addition, even if the lip edge 112 is stuck with smaller particles, the two layers of lips 112a will still fit tightly under the action of radial distortion of the inner valve plate 114 and the outer valve plate 113 to form a seal.

[0050] (4) The thickness of the inner valve plate 114 and the outer valve plate 113 of the valve nozzle 110 is controlled so that the valve nozzle 110 still has the strength to meet the use requirements during frequent opening and closing swings, thereby improving the service life of the one-way valve 100.

[0051] (5) The valve mouth 110 is configured to be in an arc shape, so that the fluid passes through the smoothly transitioned turbulent flow channel 111, with less impact resistance and less fluid kinetic energy loss.

[0052] (6) The one-way valve 100 provided by the present disclosure can realize the functions of other relatively complex and expensive components such as solenoid valves, but at a lower cost.

[0053] (7) In the mud and sand cleaning test of the one-way valve 100 at the cleaning station of the sweeping robot, the straight-mouthed one-way valve 100 will fail after running for a maximum of 3 cleaning cycles (one cleaning cycle takes less than 3 minutes), while the one-way valve 100 of the embodiment of the present application can run continuously for more than 100 hours without failure.

[0054] (8) Since the one-way valve 100 of the present application has the characteristic of not failing even when passing through sand, the sewage system can use a positive displacement pump to discharge sewage, avoiding the use of centrifugal pumps or axial flow pumps that do not have self-priming capabilities and require additional water replenishment equipment to be added to the pump, thereby reducing the complexity of the entire sewage system and making the entire sewage system occupy a smaller space.

[0055] The second embodiment of the present application provides a sewage system, see Figure 5 The sewage system includes a pipeline 200, a pump 300 and a one-way valve 100 of any embodiment of the first aspect, and the one-way valve 100 and the pump 300 are both connected to the pipeline 200. The sewage system can be a household sewage system for discharging domestic sewage such as laundry water, floor washing water or mopping brush, and can be a supermarket, enterprise sewage system or municipal pipe network sewage system, which is not limited in the embodiments of the present application.

[0056] In some embodiments, the pump 300 may be a positive displacement pump to form a sewage system that pumps and discharges at the same time; a centrifugal pump, an axial flow pump, or the like may also be used as the pump 300, which is not limited in the embodiments of the present application. When the pump 300 is a positive displacement pump to form a sewage system that pumps and discharges at the same time, the valve mouth 110 of the one-way valve 100 opens and closes once per cycle, which can ensure that particulate impurities in the fluid will not get stuck in the valve mouth 110 during the high-frequency opening and closing process.

[0057] In some embodiments, the pump 300 is a volumetric pump, such as a rotor pump or a reciprocating pump such as an airbag pump or a piston pump. The volumetric pump uses the change in the volume of the pump cylinder to transport the pump, and its working power comes from the air pressure difference, so it is particularly important to ensure the sealing performance inside. The one-way valve 100 works based on the principle of local speed increase and pressure reduction when the liquid passes through the throttle at high speed. When the fluid passes through the one-way valve 100, it enters the throttle where the valve mouth narrows, the fluid speed increases, the pressure drops, and a negative pressure difference is formed. The negative pressure difference formed causes the valve wing to lift upward and open the throttle. If the negative pressure difference disappears or becomes smaller, the valve wing will close downward. When the one-way valve 100 is closed, it has good sealing check performance, which is the key to ensuring the sealing performance in the volumetric pump and generating the air pressure difference, thereby realizing the water absorption and drainage function of the volumetric pump. Therefore, the one-way valve 100 of the present application that does not get stuck particles cooperates with the volumetric pump to form a drainage system with self-priming and self-draining functions, which meets the use function of long-term sewage discharge. The one-way valve 100 and the volumetric pump are used together to omit power, and can replace the electromagnetic mechanical valve that requires power or the drainage pump 300 that does not have a self-priming function (requires additional water replenishment equipment), thereby simplifying the complexity of the sewage system and reducing costs.

[0058] In a third aspect of the present application, a cleaning device is provided, which includes the sewage discharge system of any embodiment of the second aspect or the one-way valve 100 of any embodiment of the first aspect. The cleaning device can be a sweeping robot, a sweeping machine or a cleaning robot for household floor cleaning, or a floor scrubber robot for floor cleaning in public places such as shopping malls and supermarkets, etc., which is not limited by the embodiments of the present application.

[0059] In some embodiments, when the cleaning device is a cleaning robot used for household floor cleaning, after the cleaning part of the cleaning robot, such as a mop, finishes cleaning the floor, the main body of the cleaning robot docks at a cleaning station, and the mop is cleaned by supplying water from a water tank at the cleaning station and cooperating with the cleaning structure to clean the mop. The mop cleaning water that falls into the mop plate of the cleaning station is discharged into the sewage tank of the cleaning station through the sewage system of the cleaning station.

[0060] Taking the one-way valve 100 applied to a household cleaning robot as an example, the working process of the one-way valve 100 provided in the present application is as follows:

[0061] After the cleaning part of the cleaning robot (such as a mop) is cleaned in the cleaning tank, the sewage is sucked into the one-way valve 100 through the volumetric pump, and flows into the turbulence channel 111 of the valve mouth 110 through the body 120 of the one-way valve 100. At this time, the elastic valve mouth 110 swings and deforms under the flow of sewage. The sewage has a velocity component along the radial direction of the one-way valve 100 in the turbulence channel 111, which disrupts the original movement trend of the sewage along the axial direction of the one-way valve 100, forms turbulence in the turbulence channel 111, and disrupts the movement law of the particles in the sewage, making it difficult to gather at the lip 112, thereby reducing the risk of particles getting stuck at the lip 112.

[0062] When the sewage is about to be discharged, the fluid in the one-way valve 100 decreases, the impact force of the sewage on the valve mouth 110 decreases, and the elastic valve mouth 110 gradually swings back to the bent state under the action of its own restoring force, that is, the valve mouth 110 swings back sideways, and the particles in the sewage are "thrown" out from between the two lips 112a; at the same time, the relative movement of the inner valve plate 114 and the outer valve plate 113 during the swinging process of the valve mouth 110 will also disrupt the movement law of the fluid, reducing the risk of sand stuck in the lips 112a. After the sewage is discharged, the two lips 112a are sealed and fitted, completing a drainage cycle.

[0063] The above-mentioned opening and closing steps of the one-way valve 100 are repeated to complete multiple drainage cycles.

[0064] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0065] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0066] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0067] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0068] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A one-way valve (100), characterized in that: The valve mouth (110) of the one-way valve (100) is non-linear, a flow disturbance channel (111) is provided inside the valve mouth (110), a fitting lip (112) is provided at the end of the valve mouth (110), and the lip (112) is located at the outlet of the flow disturbance channel (111).

2. The one-way valve (100) according to claim 1, characterized in that: The valve mouth (110) is an elastic valve mouth (110), so that when the fluid flows through the flow disturbance channel (111), the valve mouth (110) swings when switching between an open state and a closed state.

3. The one-way valve (100) according to claim 1, characterized in that: The valve nozzle (110) comprises an inner valve plate (114) and an outer valve plate (113).

4. The one-way valve (100) according to claim 3, characterized in that: The thickness of the inner valve plate (114) is not greater than the thickness of the outer valve plate (113).

5. The one-way valve (100) according to claim 3, characterized in that: The thickness of the inner valve plate (114) is 0.3 mm to 2 mm, and the thickness of the outer valve plate (113) is 0.5 mm to 0.8 mm.

6. The one-way valve (100) according to claim 3, characterized in that: The ratio of the thickness of the inner valve plate (114) to the thickness of the outer valve plate (113) is 0.6 to 2.

5.

7. The one-way valve (100) according to any one of claims 1 to 6, characterized in that: When the valve mouth (110) is in an open state, the fluid flowing through the flow disturbance channel (111) has a flow velocity component along the radial direction of the one-way valve (100).

8. The one-way valve (100) according to any one of claims 1 to 6, characterized in that: The shape of the valve nozzle (110) is at least one of an arc shape, a U shape, and a broken line shape.

9. The one-way valve (100) according to claim 8, characterized in that: The valve mouth (110) is in an arc shape, and the outer diameter of the valve mouth (110) is 1.2 mm to 15 mm.

10. The one-way valve (100) according to any one of claims 1 to 6, characterized in that: The gap between the two lip pieces (112a) of the lip edge (112) is no greater than 0.1 mm, or the two lip pieces (112a) are arranged in close proximity.

11. The one-way valve (100) according to any one of claims 1 to 6, characterized in that: The one-way valve (100) comprises the valve nozzle (110) and a body (120); the difference between the wall thickness of the valve nozzle (110) and the wall thickness of the body (120) is no more than 0.1 mm.

12. The one-way valve (100) according to claim 11, characterized in that: The valve nozzle (110) and the body (120) are an integrated structure.

13. A sewage system, characterized in that: It comprises a pipeline (200), a pump (300) and a one-way valve (100) according to any one of claims 1 to 12, wherein the one-way valve (100) and the pump (300) are both connected to the pipeline (200).

14. A cleaning device, characterized in that: It comprises the sewage discharge system according to claim 13 or the one-way valve (100) according to any one of claims 1 to 12.

Images