Waterproof one-way valve and pipeline system

Abstract

The utility model provides a waterproof one-way valve and a pipeline system, and relates to the technical field of pipeline systems and parts thereof, the waterproof one-way valve comprises a valve seat, a valve core plate and a pipeline interface connecting piece which are arranged along the axial direction, one end of the valve seat is hermetically butted with one end of the pipeline interface connecting piece, and fluid channels in the valve seat and the pipeline interface connecting piece are communicated with each other; the valve core plate is arranged between the fluid channel of the valve seat and the fluid channel of the valve seat of the pipeline interface connecting piece; the valve element plate can float in the axial direction so as to open or close the one-way valve. Butt joint structures capable of being in butt joint with pipelines are arranged at the ends, deviating from each other, of the valve seat and the pipeline connector connecting piece in the axial direction. A floating limiting structure is further arranged between the valve seat and / or the pipeline connector connecting piece and the valve element plate, the valve element plate is allowed to float in the axial direction, and meanwhile the valve element plate is limited to rotate in the circumferential direction. After the waterproof one-way valve is installed in a pipeline system, abnormal sound in the operation process of the pipeline system is reduced, the operation reliability of the pipeline system is improved, and then user experience is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of pipeline systems and their components, and in particular to a waterproof one-way valve and pipeline system. Background Technology

[0002] As a crucial component in fluid control, check valves are widely used in various pipeline systems. Their core function lies in achieving unidirectional fluid flow through specific structural designs, allowing fluid to flow in only one direction. In pipeline systems, they prevent reverse flow of liquids, while in pneumatic systems, they prevent reverse flow of compressed air.

[0003] For example, in the automotive industry, the waterproof and backflow-proof design of air conditioning systems is particularly critical. When a vehicle is submerged in water, there is a risk of backflow in the car's air conditioning system or external water entering the vehicle. Engineers typically address these issues by installing or removing one-way valves within the car's air conditioning piping system.

[0004] However, because the one-way valves used in current automotive air conditioning piping systems are typically built into the engine circuit, and their main functional components are spring-driven, several problems exist. These include: a complex and inefficient assembly process; the risk of incorrect installation, leading to backflow of rainwater and malfunctions when the vehicle is wading through water; and potential vibrations of the valve and spring during vehicle operation, resulting in abnormal noises and affecting the vehicle's NVH (noise, vibration, and harshness) performance. These problems impact the reliability of automotive air conditioning piping systems and the user experience. Utility Model Content

[0005] The purpose of this invention is to provide a waterproof one-way valve and piping system to alleviate the aforementioned technical problems in the prior art.

[0006] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0007] In a first aspect, this utility model provides a waterproof one-way valve, comprising a valve seat, a valve core plate, and a pipeline interface connector arranged along the axial direction:

[0008] Both the valve seat and the pipeline interface connector have internal fluid channels. One end of the valve seat and one end of the pipeline interface connector are sealed together and their internal fluid channels are interconnected. The valve core plate is located between the fluid channels of the valve seat and the fluid channels of the valve seat of the pipeline interface connector.

[0009] The valve core plate is capable of floating along the axial direction to open the opening of the fluid passage of the valve seat towards one end of the valve seat when the waterproof check valve is open, and to cover the opening of the fluid passage of the valve seat towards one end of the valve seat when the waterproof check valve is closed.

[0010] Along the axial direction, the valve seat and the pipeline interface connector are respectively provided with a docking structure that can dock with the pipeline at their opposite ends;

[0011] A floating limiting structure is also provided between the valve seat and / or the pipeline interface connector and the valve core plate. The floating limiting structure allows the valve core plate to float axially while restricting the valve core plate to rotate circumferentially.

[0012] In an optional embodiment, the floating limiting structure includes a polygonal limiting protrusion on the surface of the valve core plate facing the end of the pipeline interface connector and a polygonal limiting groove on the surface of the pipeline interface connector facing the end of the valve core plate.

[0013] The polygonal limiting protrusion is embedded in the polygonal limiting slot and does not detach from the polygonal limiting slot when the valve core plate floats along the axial direction.

[0014] In an optional embodiment, the pipeline interface connector includes a cover and an interface pipe integrally connected to one side of the cover and communicating with the internal space of the cover; the end of the cover opposite to the interface pipe is connected to one end of the valve seat.

[0015] In an optional embodiment, the cover has a raised edge on one end surface facing the valve seat, and the raised edge surrounds the opening of the fluid passage of the cover facing the valve seat.

[0016] The valve seat has a second protrusion on one end surface facing the cover, and the second protrusion surrounds the opening of the fluid passage of the valve seat facing the end of the cover.

[0017] The first protrusion and the second protrusion are interlocked and sealed together.

[0018] In an optional embodiment, the outer peripheral wall of the interface tube is provided with positioning protrusions.

[0019] In an optional embodiment, the valve seat has a plug at the end opposite to the pipeline interface connector, and the outer peripheral wall of the plug has a plug-in buckle.

[0020] In an optional embodiment, the waterproof one-way valve further includes a shock-absorbing ring, which is sleeved on the outside of the end of the valve seat away from the pipe interface connector, and is used to fill the gap between the outer peripheral wall of the end of the valve seat away from the pipe interface connector and the inner wall of the pipe that abuts the valve seat in the installed state.

[0021] Secondly, this utility model provides a pipeline system including the waterproof check valve described in any of the optional embodiments of the first aspect.

[0022] In an optional implementation, the piping system is used in an automotive air conditioning system.

[0023] Specifically, in the present invention, the term "and / or" indicates that the structure before "and / or" and the structure after "and / or" are set simultaneously or selectively.

[0024] The embodiments of this utility model can achieve at least the following beneficial effects:

[0025] During assembly, the waterproof check valve is installed between two pipelines. The assembly direction is crucial; the valve seat should be positioned upstream of the pipeline interface connector, aligned with the fluid flow direction within the pipeline. Spatially, the valve seat should be above the pipeline interface connector, meaning the fluid inside the pipeline flows from top to bottom, from the valve seat to the pipeline interface connector. In terms of assembly method, the waterproof check valve, except for the connecting structures at both ends, is externally mounted on the two connected pipelines. The waterproof check valve and the two pipeline sections together form part of the pipeline system.

[0026] When the fluid in the pipeline flows normally through the waterproof one-way valve, the fluid in the pipeline pushes the valve core plate toward the end of the pipeline interface connector (downward) under its own weight. The fluid flows out of the valve seat smoothly and enters the fluid channel of the pipeline interface connector along the gap between the valve core plate and the pipeline interface connector, thereby realizing the function of controlling the one-way flow of the fluid.

[0027] When the piping system is submerged in water (e.g., in automotive air conditioning systems, when a car is wading through water), the higher the external water level, the greater the pressure. When the external water pressure reaches a certain level, the pipe interface connector slightly deforms under the external water pressure (but one end of the valve seat and one end of the pipe interface connector remain sealed together, and the fluid channels inside the two are interconnected; the aforementioned sealing connection method includes, but is not limited to, bonding, welding, fusion, or other sealing connection methods). Under this pressure, the valve core plate is pressed against the valve seat (upward pressure) by the deformed pipe interface connector, causing the fluid channel of the valve core plate to cover the valve seat and face the opening at one end of the valve seat. The waterproof check valve will be in the closed state, achieving the sealing and waterproof function. When the water level drops, the fluid in the pipeline pushes the valve core plate towards the end of the pipe interface connector (downward) under its own weight, and the pipe interface connector recovers part or all of its deformation, and the piping system resumes normal operation.

[0028] The waterproof one-way valve provided in this embodiment is installed in a pipeline system. Most of its structure is located outside the two connected pipelines, making assembly simple and convenient. It is also not easy to install it backwards, and even if it is installed backwards, it can be easily replaced, resulting in high assembly efficiency. In addition, it can avoid noise caused by shaking inside the pipeline. Furthermore, since it has no spring structure, it can avoid noise caused by spring shaking, thereby reducing abnormal noises during the operation of the pipeline system, improving the operational reliability of the pipeline system, and thus enhancing the user experience.

[0029] Furthermore, in this embodiment of the invention, a floating limiting structure is provided between the valve seat and / or the pipeline interface connector and the valve core plate. This floating limiting structure allows the valve core plate to float axially while restricting its circumferential rotation. Specifically, the floating limiting structure restricts the circumferential rotation of the valve core plate, preventing it from shifting or misaligning during axial floating in operation. This maintains the correct alignment between the valve core plate and the valve seat and pipeline interface connector, avoiding sealing failure or control inaccuracy caused by valve core plate rotation, and improving the stability and reliability of the waterproof check valve during operation. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 Exploded view of the overall structure of the waterproof one-way valve provided in this embodiment of the utility model Figure 1 ;

[0032] Figure 2 Exploded view of the overall structure of the waterproof one-way valve provided in this embodiment of the utility model Figure 2 ;

[0033] Figure 3 Exploded view of the overall structure of the waterproof one-way valve provided in this embodiment of the utility model Figure 3 .

[0034] Icons: 1-Valve seat; 11-Second protrusion; 12-Plug-in connector; 121-Plug-in buckle; 2-Valve core plate; 21-Polygonal limiting protrusion; 3-Pipeline interface connector; 31-Cover; 311-First protrusion; 312-Polygonal limiting groove; 32-Interface pipe; 321-Positioning protrusion; 4-Shock absorber ring. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0037] It should be noted that similar labels and letters in the accompanying drawings indicate similar items. Therefore, once an item is defined in one accompanying drawing, it does not need to be further defined and explained in subsequent accompanying drawings.

[0038] In the description of this utility model, it should be noted that the terms "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. 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. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Furthermore, the terms "horizontal" and "vertical" do not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0042] First aspect

[0043] This embodiment provides a waterproof one-way valve, see reference. Figures 1 to 3 The waterproof one-way valve includes a valve seat 1, a valve core plate 2, and a pipeline interface connector 3 arranged along the axial direction.

[0044] Specifically, both the valve seat 1 and the pipeline interface connector 3 are provided with fluid channels inside. One end of the valve seat 1 is sealed and connected to one end of the pipeline interface connector 3, and the fluid channels inside the two are interconnected. Along the axial direction, the opposite ends of the valve seat 1 and the pipeline interface connector 3 are respectively provided with a docking structure that can be connected to the pipeline. The valve core plate 2 is located between the fluid channel of the valve seat 1 and the fluid channel of the valve seat 1 in the pipeline interface connector 3. The valve core plate 2 can float along the axial direction to open the opening of the fluid channel of the valve seat 1 facing one end of the valve seat 1 when the waterproof check valve is open, and to cover the opening of the fluid channel of the valve seat 1 facing one end of the valve seat 1 when the waterproof check valve is closed.

[0045] During assembly, the waterproof check valve is installed between two pipelines. The assembly direction is crucial; the valve seat 1 should be positioned upstream of the pipeline interface connector 3, along the direction of fluid flow within the pipeline. Spatially, the valve seat 1 should be positioned above the pipeline interface connector 3, meaning the fluid inside the pipeline flows from top to bottom, from the valve seat 1 to the pipeline interface connector 3. In terms of assembly method, the waterproof check valve, except for the docking structures at both ends, is externally mounted on the two docked pipelines. The waterproof check valve and the two pipeline sections together form part of the pipeline system.

[0046] When the fluid in the pipeline flows normally through the waterproof one-way valve, the fluid in the pipeline pushes the valve core plate 2 towards the end (downward) of the pipeline interface connector 3 under its own weight. The fluid flows smoothly out of the valve seat 1 and enters the fluid channel of the pipeline interface connector 3 along the gap between the valve core plate 2 and the pipeline interface connector 3, thereby realizing the function of controlling the one-way flow of the fluid. (The "gap between the valve core plate 2 and the pipeline interface connector 3" is achieved by pre-setting that the valve core plate 2 will not completely cover the opening of the fluid channel of the pipeline interface connector 3 facing the valve seat 1. Specifically, this can be achieved by the valve core plate 2 having an area difference or a minimum axial height difference with the opening.)

[0047] When the piping system is submerged in water (e.g., in automotive air conditioning systems, when a car is wading through water), the higher the external water level, the greater the pressure. When the external water pressure reaches a certain level, the pipe interface connector 3 deforms slightly under the external water pressure (but one end of the valve seat 1 and one end of the pipe interface connector 3 remain sealed together, and the fluid channels inside the two are interconnected; the aforementioned sealing connection method includes, but is not limited to, bonding, welding, fusion, or other sealing connection methods). Under this pressure, the valve core plate 2 is pressed against the valve seat 1 (upward pressure) by the deformed pipe interface connector 3, causing the valve core plate 2 to cover the opening of the fluid channel of the valve seat 1 facing the valve seat 1. The waterproof check valve will be in the closed state, achieving the sealing and waterproof function. When the water level drops, the fluid in the pipeline pushes the valve core plate 2 towards the pipe interface connector 3 (downward) under its own weight, and the pipe interface connector 3 recovers part or all of its deformation, and the piping system resumes normal operation.

[0048] The waterproof check valve provided in this embodiment, after being installed in the pipeline system, has most of its structure external to the two connected pipelines, making assembly simple and convenient. It is also not easy to install it backwards, and even if it is installed backwards, it can be easily replaced, resulting in high assembly efficiency. In addition, it can avoid noise generated by shaking inside the pipeline; and since it has no spring structure, it can avoid noise generated by spring shaking, thereby reducing abnormal noises during the operation of the pipeline system, improving the operational reliability of the pipeline system, and thus improving the user experience.

[0049] In particular, the materials of each part of the waterproof one-way valve provided in this embodiment are not specifically limited. Some parts can be made of injection-molded material, but are not limited to it. The pipeline interface connector 3 is made of a material that can be deformed under external water pressure and can recover at least part of its deformation under internal fluid pressure or its own elastic force after the external water pressure is removed.

[0050] Furthermore, in this embodiment, a floating limiting structure is provided between the valve seat 1 and / or the pipeline interface connector 3 and the valve core plate 2. This floating limiting structure allows the valve core plate 2 to float axially while restricting its circumferential rotation. Specifically, the floating limiting structure restricts the circumferential rotation of the valve core plate 2, preventing it from shifting or misaligning during axial floating in operation. This maintains the correct alignment between the valve core plate 2 and the valve seat 1 and pipeline interface connector 3, avoiding sealing failure or control inaccuracy caused by the rotation of the valve core plate 2, and improving the stability and reliability of the waterproof check valve during operation.

[0051] In an alternative embodiment of the present embodiment, the above floating limit structure includes a polygonal limit protrusion 21 provided on the surface of the valve core plate 2 facing one end of the pipeline interface connector 3 and a polygonal limit groove 312 provided on the surface of the pipeline interface connector 3 facing one end of the valve core plate 2; the polygonal limit protrusion 21 is embedded in the polygonal limit groove 312 and does not disengage from the polygonal limit groove 312 when the valve core plate 2 floats axially.

[0052] In this alternative embodiment, the mating structure of the polygonal limit protrusion 21 and the polygonal limit groove 312 provides a more reliable limiting relationship, fully ensuring that the valve core plate 2 does not rotate in the circumferential direction. The polygon can be any polygon shape, including but not limited to a square or Figure 2 the "I" shape shown or any other arbitrary polygon shape.

[0053] In an alternative embodiment of the present embodiment, the pipeline interface connector 3 includes a cover body 31 and an interface pipe 32 integrally connected to one side of the cover body 31 and communicating with the internal space of the cover body 31; one end of the cover body 31背离接口管32的一端与阀座1的一端对接。接口管32作为对接延长部,可以增加管路接口连接件3与对接管件之间的接触面积,提高与管路进行对接的结构稳定可靠性,盖体31则提供了较大的安装空间以供阀芯板2进行安装。

[0054] In an alternative embodiment of the present embodiment, a first convex edge 311 is provided on the surface of the cover body 31 facing the valve seat 1, and the first convex edge 311 surrounds the opening of the fluid passage of the cover body 31 facing the valve seat 1; a second convex edge 11 is provided on the surface of the valve seat 1 facing the cover body 31, and the second convex edge 11 surrounds the opening of the fluid passage of the valve seat 1 facing the cover body 31; the first convex edge 311 and the second convex edge 11 are snap-fitted and sealed.

[0055] In this alternative embodiment, the snap-fitting structure of the first convex edge 311 and the second convex edge 11 helps to accurately position and align the cover body 31 and the valve seat 1, ensuring the correct docking of the internal fluid passages of the two, reducing assembly errors. At the same time, the snap-fitting design of the first convex edge 311 and the second convex edge 11 forms a double-sealing structure, effectively preventing fluid leakage and improving the overall sealing performance of the waterproof check valve.

[0056] In an optional embodiment of this invention, the outer peripheral wall of the interface pipe 32 is provided with a positioning protrusion 321. This positioning protrusion 321 is used to prevent the interface pipe 32 from falling off the connecting pipe during assembly, thereby enhancing the reliability of the connection between the interface pipe 32 and the connecting pipe. During production and assembly, a groove extending axially away from the interface pipe 32 is provided on the inner side of the connecting pipe that connects to the interface pipe 32 at one end. When the end of the connecting pipe connects to the interface pipe 32, the positioning protrusion 321 on the peripheral surface of the interface pipe 32 engages with the groove. This prevents the interface pipe 32 from rotating relative to the connecting pipe, thus preventing axial misalignment during rotation and preventing the interface pipe 32 from falling off the connecting pipe.

[0057] In an optional embodiment of this example, the valve seat 1 is provided with a plug 12 at one end away from the pipeline interface connector 3. The outer peripheral wall of the plug 12 is provided with a plug buckle 121. The plug buckle 121 is preferably an elastic buckle structure, which can prevent the plug 12 from falling off the connecting pipeline, thereby enhancing the reliability of the connection with the connecting pipeline.

[0058] In an optional embodiment of this example, the waterproof one-way valve further includes a shock-absorbing ring 4, which is sleeved on the outside of the end of the valve seat 1 away from the pipe interface connector 3, and is used to fill the gap between the outer peripheral wall of the end of the valve seat 1 away from the pipe interface connector 3 and the inner wall of the pipe that connects to the valve seat 1 in the installed state.

[0059] In this optional embodiment, the damping ring 4 can be, but is not limited to, a sponge ring, a rubber ring, or other structures. Its inner hole sidewall is designed to fit the outer peripheral wall of the pipe interface connector 3 (shape adaptation). By filling the gap between the outer peripheral wall of the valve seat 1 away from the pipe interface connector 3 and the inner wall of the pipe that connects to the valve seat 1, the connection between the valve seat 1 and its connecting pipe is made tighter and more stable, reducing problems caused by loosening or misalignment, improving the overall stability of the system, and further reducing the noise generated by vibration, thus further improving the noise reduction effect.

[0060] Second aspect

[0061] This embodiment provides a piping system including a waterproof check valve provided in any optional embodiment of the first aspect.

[0062] The specific structure and achievable effects of the pipeline system provided in this embodiment can be obtained by referring to the optional or preferred implementation methods in the first aspect.

[0063] The piping system provided in this embodiment can be applied to any device or equipment. Optionally, the piping system can be applied to an automotive air conditioning system.

[0064] Finally, it should be noted that:

[0065] 1. In this specification, "and / or" means that the structure before "and / or" and the structure after "and / or" are set simultaneously or selectively;

[0066] 2. The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to mutually. The above embodiments in this specification are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of this utility model.

Claims

1. A waterproof one-way valve, characterized in that, Includes a valve seat (1) arranged axially, a valve core plate (2), and a pipeline interface connector (3): Both the valve seat (1) and the pipeline interface connector (3) are provided with fluid channels. One end of the valve seat (1) is sealed and connected to one end of the pipeline interface connector (3), and the fluid channels inside the two are interconnected. The valve core plate (2) is located between the fluid channel of the valve seat (1) and the fluid channel of the valve seat (1) of the pipeline interface connector (3). The valve core plate (2) can float along the axial direction to open the opening of the fluid passage of the valve seat (1) toward one end of the valve seat (1) when the waterproof check valve is open, and to seal the opening of the fluid passage of the valve seat (1) toward one end of the valve seat (1) when the waterproof check valve is closed. Along the axial direction, the valve seat (1) and the pipeline interface connector (3) are respectively provided with a docking structure that can dock with the pipeline at their opposite ends; A floating limiting structure is also provided between the valve seat (1) and / or the pipeline interface connector (3) and the valve core plate (2). The floating limiting structure allows the valve core plate (2) to float axially while restricting the valve core plate (2) from rotating circumferentially.

2. The waterproof one-way valve according to claim 1, characterized in that, The floating limiting structure includes a polygonal limiting protrusion (21) on the surface of the valve core plate (2) facing the pipeline interface connector (3) and a polygonal limiting groove (312) on the surface of the pipeline interface connector (3) facing the valve core plate (2). The polygonal limiting protrusion (21) is embedded in the polygonal limiting slot (312) and does not detach from the polygonal limiting slot (312) when the valve core plate (2) floats along the axial direction.

3. The waterproof one-way valve according to claim 1, characterized in that, The pipeline interface connector (3) includes a cover (31) and an interface pipe (32) integrally connected to one side of the cover (31) and communicating with the internal space of the cover (31); the end of the cover (31) facing away from the interface pipe (32) is connected to one end of the valve seat (1).

4. The waterproof one-way valve according to claim 3, characterized in that, The cover (31) has a raised edge (311) on one end surface facing the valve seat (1), and the raised edge (311) surrounds the opening of the fluid passage of the cover (31) facing the valve seat (1). The valve seat (1) has a raised edge (11) on one end surface facing the cover (31), and the raised edge (11) surrounds the opening of the fluid passage of the valve seat (1) facing the cover (31). The first protrusion (311) and the second protrusion (11) are interlocked and sealed together.

5. The waterproof one-way valve according to claim 3, characterized in that, The outer peripheral wall of the interface tube (32) is provided with a positioning protrusion (321).

6. The waterproof one-way valve according to claim 1, characterized in that, The valve seat (1) is provided with a plug (12) at one end away from the pipeline interface connector (3), and the outer peripheral wall of the plug (12) is provided with a plug buckle (121).

7. The waterproof one-way valve according to claim 1, characterized in that, The waterproof one-way valve also includes a shock-absorbing ring (4), which is sleeved on the outside of the valve seat (1) away from the pipeline interface connector (3) and is used to fill the gap between the outer peripheral wall of the valve seat (1) away from the pipeline interface connector (3) and the inner wall of the pipeline that is connected to the valve seat (1) in the installation state.

8. A piping system, characterized in that, The waterproof check valve includes any one of claims 1 to 7.

9. The piping system according to claim 8, characterized in that, The piping system is used in automotive air conditioning systems.

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