One-way valve

Abstract

This application provides a one-way valve comprising: a valve pipe having a first pipe segment and a second pipe segment; a valve seat provided between the first pipe segment and the second pipe segment, located at the connection point between the first pipe segment and the second pipe segment, having a valve port, and communicating the first pipe segment and the second pipe segment through the valve port; and a valve core provided movably within the first pipe segment or the second pipe segment, positioned opposite the valve port, and capable of adjusting the flow rate at the valve port. The technical aspects provided in this application can solve the problem of internal leakage that is prone to occur at the connection point between the valve seat and the valve pipe assembly in related technologies.

Description

Technical Field

[0001] This application claims the priority of a patent application with an application number of 2023222088531 and an application title of "One-way Valve" filed with the China National Intellectual Property Administration on August 16, 2023, and a patent application with an application number of 2023222256217 and an application title of "One-way Valve" filed with the China National Intellectual Property Administration on August 16, 2023.

[0002] This application relates to the technical field of valve assemblies, and specifically, to one-way valves.

Background Art

[0003] Currently, in an air conditioning system, in order to control the flow direction of a fluid, a one-way valve is often used as a backflow prevention assembly and provided in a pipeline system.

[0004] The one-way valve in the related art usually includes a valve pipe, a valve core, and a valve seat. The valve core and the valve seat are provided in the valve pipe. The valve core realizes one-way conduction of the fluid by moving to close or open the valve port on the valve seat. However, in order to fix the valve seat to the valve pipe, usually, the valve seat is first press-fitted into the valve pipe with an interference fit, and then a groove is engraved on the outer wall of the valve pipe, and the engraved groove is engaged with the fixing groove on the side wall of the valve seat to limit and fix the valve seat in the valve pipe. When provided in this way, the thickness of the groove engraving structure of the valve pipe becomes thin, and it is easy to break here. At the same time, there is also a risk of internal leakage at the engagement location between the engraved groove and the side wall of the valve seat.

Summary of the Invention

[0005] This application provides a one-way valve for solving the problem that internal leakage is likely to occur at the connection location between the valve seat and the valve pipe in the related art.

[0006] This application provides a one-way valve comprising: a valve pipe having a first pipe segment and a second pipe segment; a valve seat provided between the first pipe segment and the second pipe segment, located at the connection point between the first pipe segment and the second pipe segment, having a valve port, and allowing the first pipe segment and the second pipe segment to communicate through the valve port; and a valve core provided movably within the first pipe segment or the second pipe segment, facing the valve port, and capable of adjusting the flow rate at the valve port.

[0007] Furthermore, the first pipe segment has a first communication port and a first port provided opposite each other, and the second pipe segment has a second communication port and a second port provided opposite each other, with one end of the valve seat welded to the first port and the other end of the valve seat welded to the second port. By providing it in this manner, breakage at the connection point between the valve pipe and the valve seat can be effectively prevented.

[0008] Furthermore, a restricting structure is provided between the valve seat and the first and second pipe segments.

[0009] Furthermore, a limiting structure is provided between the valve seat and the first pipe segment or the second pipe segment. By providing the above-described structure, displacement of the valve seat relative to the first pipe segment or the second pipe segment during the welding process is prevented, making welding of the valve seat easier and improving work efficiency.

[0010] Furthermore, the valve seat has a first end face and a second end face that are opposite to each other, with a first projection on the first end face and a second projection on the second end face, the periphery of the first projection abutting against the inner wall of the first pipe segment, and / or, a second projection on the second end face, the periphery of the second projection abutting against the inner wall of the second pipe segment. By providing the valve seat in this manner, displacement of the valve seat during the welding process can be prevented, welding efficiency can be improved, radial stability when fixing the valve seat in the valve pipe can be improved, and the influence of fluid turbulence in the unidirectional valve on the valve seat can be reduced.

[0011] Furthermore, the valve seat is pressed into the valve pipe and is also welded to the valve pipe for fixation.

[0012] Furthermore, the first pipe segment has a first connecting end, the second pipe segment has a second connecting end, the valve seat is welded and fixed to the first pipe segment, and the end face of the first connecting end is welded and fixed to the end face of the second connecting end.

[0013] Furthermore, the valve core is movably mounted within the first pipe segment.

[0014] Furthermore, a fixing groove is provided in an annular shape on the inner wall of the second pipe segment, and the fixing groove is located at the second connecting end, with the valve seat fixed within the fixing groove.

[0015] Furthermore, the first pipe segment includes a linear segment and a transition segment connected to each other, with one end of the linear segment away from the transition segment connected to the second pipe segment, the flow area of ​​the transition segment gradually decreasing in the direction away from the valve opening, and the valve core being movably provided within the linear segment. By providing the above configuration, the fluid pressure drop when the fluid passes through the linear segment and flows into the system pipeline can be reduced, thereby ensuring the efficiency of fluid transport.

[0016] Furthermore, the valve core has a contact end and a sealing end that are provided opposite each other. The sealing end is provided facing the valve opening and engages with the valve opening to regulate the flow rate at the valve opening. The outer diameter of the contact end is larger than the minimum inner diameter of the transition segment, and the contact end engages with the inner wall of the transition segment to restrict the displacement of the valve core. By providing the valve core in this manner, the relative displacement of the valve core can be restricted, and the engagement relationship between the valve core, the valve seat, and the valve pipe can be ensured.

[0017] Furthermore, the outer wall of the contact end has an engagement surface, and the distance between the engagement surface and the axis of the valve core gradually decreases in the direction away from the valve opening, and the engagement surface is engaged with and restricted by the inner wall of the transition segment. By providing it in this manner, the engagement surface can be brought into contact with the transition segment, preventing the valve core from getting stuck.

[0018] Furthermore, the valve core has a connecting portion, one end of which is connected to the contact end, and the other end of which is connected to the sealing end. The diameter of the connecting portion is larger than the diameter of the contact end, and when the contact end contacts the transition segment, there is a gap between the connecting portion and the transition segment in the axial direction. By providing it in this manner, the outermost edge of the connecting portion is prevented from contacting the connection point between the straight segment and the transition segment, preventing the outer end of the connecting portion that is close to the transition segment from getting caught on the transition segment, thereby improving the stability of the one-way valve.

[0019] Furthermore, the valve core includes a body and a plurality of support protrusions, the plurality of support protrusions are provided on the outer wall of the body at annular intervals along the circumferential direction of the body, the support protrusions extend along the axial direction of the body, and the support protrusions have opposing connecting ends and free ends, the free ends are located on one side away from the valve opening of the body and protrude from the end of the body, the free ends form a contact end and the end close to the valve opening of the body forms a sealing end, the connecting ends are located in the middle of the body, the plurality of support protrusions engage with the inner wall of the valve pipe to guide the valve core, and a flow passage is formed between two adjacent support protrusions. By providing the valve core in this manner, the support protrusions act as a guide when the valve core moves within the valve pipe, and the stability of the valve core when it moves within the valve pipe can be improved.

[0020] Furthermore, the inner diameter of one end of the valve port that is close to the valve core gradually increases in the direction approaching the valve core. By providing it in this manner, the sealing area between the sealing segment and the valve port is increased, preventing fluid from leaking from the valve port when the valve core closes the valve port. [Brief explanation of the drawing]

[0021] The attached drawings are part of this application and are used to enhance the understanding of this application. The exemplary embodiments and descriptions of this application are used to illustrate this application and are not intended to unduly limit this application.

[0022] [Figure 1] The structural schematic diagram of a one-way valve provided in one or more embodiments of the present application is shown. [Figure 2] The structural exploded view of a one-way valve provided in one or more embodiments of the present application is shown. [Figure 3] The structural schematic diagram of a one-way valve provided in one or more embodiments of the present application is shown. [Figure 4] The structural exploded view of a one-way valve provided in one or more embodiments of the present application is shown.

[0023] Here, the above drawings include the following reference numerals. 10 Valve pipe, 11 First pipe segment, 111 Transition segment, 112 Straight segment, 12 Second pipe segment, 20 Valve seat, 21 Valve port, 30 Valve core, 31 Body, 32 Support protrusion, 33 Contact end, 34 Sealing end.

Embodiments for Carrying out the Invention

[0024] The technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, not all embodiments. The description of at least one exemplary embodiment below is merely exemplary and is not intended to limit the present application or its application or use. All other embodiments that can be obtained by those skilled in the art based on the embodiments of the present application without creative efforts are within the protection scope of the present application.

[0025] As shown in FIGS. 1 and 2, an embodiment of the present application provides a one-way valve including a valve pipe 10, a valve seat 20, and a valve core 30. Here, the valve pipe 10 has a first pipe segment 11 and a second pipe segment 12. The valve seat 20 is provided between the first pipe segment 11 and the second pipe segment 12, and the valve seat 20 is located at the connection point between the first pipe segment 11 and the second pipe segment 12. The valve seat 20 has a valve port 21, and the first pipe segment 11 and the second pipe segment 12 are communicated through the valve port 21. The valve core 30 is movably provided in the first pipe segment 11 or the second pipe segment 12. The valve core 30 is provided opposite to the valve port 21, and the valve core 30 can adjust the flow rate at the valve port 21. During the use process of the one-way valve, due to the pressure of the fluid, the valve core 30 is moved to move relative to the valve seat 20 in the valve pipe 10 to open or close the valve port 21, and furthermore, the adjustment of the fluid flow rate at the valve port 21 can be realized.

[0026] According to the technical solution provided in the present application, the valve seat 20 is provided between the first pipe segment 11 and the second pipe segment 12, and the valve seat 20 is located at the connection point between the first pipe segment 11 and the second pipe segment 12, which can improve the connection performance between the valve pipe 10 and the valve seat 20 and ensure the structural stability of the valve pipe 10. Compared with the method of fixing the valve seat 20 by adopting the method of engraving grooves on the outer wall of the valve pipe 10 in the prior art, in the present application, since the valve seat 20 is provided between the first pipe segment 11 and the second pipe segment 12, the risk of being easily broken at the position where the groove is engraved in the related technology can be avoided. At the same time, by such an installation method, it is also possible to prevent the fluid from leaking from the gap between the valve seat 20 and the valve pipe 10, and improve the sealing performance and reliability of the one-way valve.

[0027] In one embodiment of this application, the first pipe segment 11 has a first communication port and a first port provided opposite each other, and the second pipe segment 12 has a second communication port and a second port provided opposite each other, with one end of the valve seat 20 welded to the first port and the other end of the valve seat 20 welded to the second port. By providing it in this manner, the valve seat 20 is welded to the first port and the second port respectively, fixing the valve seat 20 between the first pipe segment 11 and the second pipe segment 12, and effectively preventing the valve pipe 10 and the valve seat 20 from breaking at the connection point. Specifically, the welding method between the valve seat 20 and the valve pipe 10 is laser welding, which reduces the amount of heat, reduces deformation of the valve pipe 10 due to heat conduction or high-temperature ambient heat, further reduces the possibility of fluid leakage due to a gap between the valve seat 20 and the valve pipe 10, and improves the sealing performance of the one-way valve.

[0028] In this application, the valve pipe 10 and valve seat 20 may be manufactured using stainless steel material. In the conventional art, it is necessary to engrave grooves on the outside of the valve pipe 10, so the valve pipe 10 must be made of a copper alloy material with relatively good processing performance, which increases the manufacturing cost of the one-way valve. In contrast, in this application, since the valve pipe 10 and valve seat 20 are made of lower-cost stainless steel material, the manufacturing cost can be reduced.

[0029] Specifically, a restricting structure may be provided between the valve seat 20 and the first pipe segment 11. By providing this restricting structure, the relative position between the valve seat 20 and the first pipe segment 11 can be limited. By limiting the position of the valve seat 20, welding of the valve seat 20 becomes easier, and work efficiency can be improved.

[0030] Specifically, a limiting structure may also be provided between the valve seat 20 and the second pipe segment 12. By providing a limiting structure, after the valve seat 20 and the second pipe segment 12 are connected, the limiting structure improves the limiting effect of the second pipe segment 12 on the valve seat 20, preventing the second pipe segment 12 from oscillating relative to the valve seat 20 during use, and improving the connection performance between the valve seat 20 and the second pipe segment 12.

[0031] It is understood that further restricting structures may be provided between the valve seat 20 and the first pipe segment 11, and between the valve seat 20 and the second pipe segment 12. By providing restricting structures, it becomes easier to position the valve seat 20 with the first pipe segment 11 and the second pipe segment 12 during the welding process, preventing the valve seat 20 from being displaced relative to the first pipe segment 11 or the second pipe segment 12 during the welding process, facilitating welding to the valve seat 20, and improving work efficiency. At the same time, the restricting structures can further improve the restricting effect of the valve seat 20 with respect to the first pipe segment 11 and the second pipe segment 12, preventing the valve seat 20 from shaking due to fluid turbulence during use, and improving the connection performance between the valve seat 20 with the first pipe segment 11 and the second pipe segment 12.

[0032] As shown in Figure 1, the valve seat 20 has a first end face and a second end face that are opposite to each other. The first end face has a first projection, and the second end face has a second projection. The periphery of the first projection abuts against the inner wall of the first pipe segment 11, and the periphery of the second projection abuts against the inner wall of the second pipe segment 12. By providing the valve seat 20 in this manner, when welding is performed, the valve seat 20 can be positioned relative to the first pipe segment 11 by the first projection, and the valve seat 20 can be positioned relative to the second pipe segment 12 by the second projection. In this way, displacement of the valve seat 20 relative to the first pipe segment 11 and the second pipe segment 12 during the welding process is prevented, and the welding efficiency can be improved. At the same time, by providing the first and second protrusions during the operation of the one-way valve, radial stability when fixing the valve seat 20 within the valve pipe 10 can be improved, loosening of the valve seat 20 due to fluid turbulence within the one-way valve can be prevented, and the connection performance between the valve seat 20 and the first pipe segment 11 and the second pipe segment 12 can be improved. Of course, in some other specific embodiments, the structure of the valve seat 20 may differ from the above, for example, by providing the first protrusion only on the first end face of the valve seat 20 and the second end face as a flat surface, or by providing the second protrusion only on the second end face of the valve seat 20 and the first end face as a flat surface, and those skilled in the art can selectively provide them as needed.

[0033] In other embodiments of this application, the outer surfaces of the first and second protrusions may be provided as inclined surfaces, and chamfers that engage with the inclined surfaces may be provided on the inner walls of the first and second ports. In this way, a limiting effect on the valve core 30 can be achieved, and at the same time, the contact area between the valve core 30 and the valve pipe 10 can be further increased, thereby further preventing fluid leakage.

[0034] In this embodiment, unlike another embodiment provided in this application in which one end of the valve seat 20 is welded to the first port and the other end of the valve seat 20 is welded to the second port, as shown with reference to Figures 3 and 4, in this embodiment the valve seat 20 is pressed into the valve pipe 10 and fixed to the valve pipe 10 by welding. The valve seat 20 is first pressed into the valve pipe 10 and fixed to the valve pipe 10 by welding, and then the valve seat 20 is turned to form the valve opening 21. Because the volume of the valve pipe 10 is relatively large, this arrangement allows the jig to easily and stably clamp the valve pipe 10, and furthermore, prevents the valve seat 20 from shaking during the turning process, improving the machining accuracy of the valve opening 21. In contrast to conventional methods in which the valve port 21 is first turned before fixing the valve seat 20 and valve pipe 10, the one-way valve provided in this application facilitates clamping with a jig, improves the machining accuracy of the valve seat 20, and ensures the sealing performance of the one-way valve.

[0035] Specifically, the connection between the valve seat 20 and the valve pipe 10 may be an interference fit; that is, the valve seat 20 may be first installed inside the valve pipe 10 with an interference fit, and then the two may be securely fixed together by welding. Since the entire valve pipe 10 with the valve seat 20 fixed to it is clamped in a machining jig, and then the valve seat 20 is machined on a lathe to form the valve opening 21, the machining of the valve opening 21 can be made easier, and the machining accuracy of the valve opening 21 can be improved.

[0036] Specifically, the welding method between the valve seat 20 and the valve pipe 10 is furnace brazing or brazing, which ensures the integrity of the weld bead, prevents cracks from occurring at the weld site, further reduces the possibility of fluid leakage due to gaps between the valve seat 20 and the valve pipe 10, and improves the sealing performance of the one-way valve.

[0037] Furthermore, the first pipe segment 11 has a first connecting end, the second pipe segment 12 has a second connecting end, the valve seat 20 is welded and fixed to the second pipe segment 12, and the end face of the first connecting end is welded and fixed to the end face of the second connecting end. By providing the valve seat 20 in this manner, the first pipe segment 11 and the second pipe segment 12 can be welded together by direct contact, such as by laser welding, eliminating the need to weld the valve seat 20 to the second pipe segment 12 and then weld the valve seat 20 to the first pipe segment 11. This effectively reduces the risk of leakage at the welded location of the valve pipe 10 and improves the stability and sealing performance of the one-way valve. In this embodiment, the valve seat 20 can be completely positioned within the second pipe segment 12, and the end face of the valve seat 20 facing one end in the direction of the first pipe segment 11 is aligned with the end face of the first connecting end. At this time, the end face of the first connecting end and the end face of the second connecting end are welded and fixed together. By providing the above configuration, the valve seat 20 can be easily positioned relative to the second pipe segment 12 during the welding process.

[0038] The valve core 30 is appropriately provided to be movable within the first pipe segment 11. By providing the valve core 30 within the first pipe segment 11, the pressure of the fluid can move the valve core 30 and cause it to move relative to the valve seat 20 within the first pipe segment 11, thereby opening or closing the valve port 21, and further, adjusting the fluid flow rate at the valve port 21. With this configuration, the machining of the valve port 21 becomes easier, and in the turning process, the valve seat 20 can be welded and fixed first, and then the valve seat 20 can be turned to form the valve port 21. The turning process of the valve port 21 can be easily observed, and adjustments can be made in a timely manner to ensure the machining accuracy of the valve port 21.

[0039] The valve seat 20 is positioned such that a portion of it is located within the first pipe segment 11 and a portion of it is located within the second pipe segment 12, and in this case, the end faces of the first connecting end and the end faces of the second connecting end may be welded and fixed together. By providing it in this manner, the valve seat 20 acts as a limiting force on the second pipe segment 12, preventing misalignment when the first pipe segment 11 and the second pipe segment 12 are connected, and improving the connection performance between the valve seat 20 and the first pipe segment 11 and the second pipe segment 12.

[0040] Specifically, a fixing groove is provided in an annular shape on the inner wall of the second pipe segment 12. The fixing groove is located at the second connection end and is an annular recessed groove, and the valve seat 20 is fixed within the fixing groove. By providing it in this manner, the fixing groove can exert a limiting effect on the valve seat 20. When the direction of fluid flow is from the valve core 30 to the valve opening 21, the fixing groove prevents the valve seat 20 from being displaced by the impact of the valve core 30 if the fluid pressure is too high, thereby ensuring the stability of the one-way valve. Furthermore, the fixing groove also exerts a limiting effect during the installation process of the valve seat 20, making it easier to position the valve seat 20.

[0041] Furthermore, the first pipe segment 11 includes a linear segment 112 and a transition segment 111 connected to each other, with one end of the linear segment 112 away from the transition segment 111 connected to the second pipe segment 12, the flow area of ​​the transition segment 111 gradually decreasing toward the direction away from the valve opening 21, and the valve core 30 being movably provided within the linear segment 112. When a one-way valve is connected to the system pipeline, the diameter of the valve pipe 10 of the one-way valve is provided to be larger than the diameter of the system pipeline in order to ensure the transport efficiency when the fluid passes through the one-way valve, and in this application, by providing the transition segment 111, the fluid pressure drop when the fluid passes through the linear segment 112 and flows into the system pipeline can be reduced, thereby ensuring the fluid transport efficiency.

[0042] In this application, the valve core 30 has a contact end 33 and a sealing end 34 provided opposite to each other, the sealing end 34 is provided facing the valve port 21 and engages with the valve port 21 to regulate the flow rate at the valve port 21, the outer diameter of the contact end 33 is larger than the minimum inner diameter of the transition segment 111, and the contact end 33 engages with the inner wall of the transition segment 111 to limit the displacement of the valve core 30. Specifically, when the direction of fluid flow is from the valve port 21 through the valve core 30, the valve core 30 is pushed up by the fluid pressure, the sealing segment of the valve core 30 and the port are separated, the contact end 33 of the valve core 30 comes into contact with the transition segment 111, and the fluid can flow through the valve port 21, when the direction of fluid flow is from the valve core 30 through the valve port 21, the valve core 30 moves toward the valve port 21 under fluid pressure, the sealing segment of the valve core 30 closes the valve port 21, and the fluid is blocked by the valve seat 20. By providing the valve core 30 and the transition segment 111, the relative displacement of the valve core 30 can be limited, and the engagement relationship between the valve core 30, the valve seat 20, and the valve pipe 10 can be ensured.

[0043] Furthermore, the outer wall of the contact end 33 has an engaging surface, and the distance between the engaging surface and the axis of the valve core 30 gradually decreases in the direction away from the valve opening 21, and the engaging surface is engaged with and restricted by the inner wall of the transition segment 111. In this application, in order to reduce the overall weight of the valve core 30, the valve core 30 is made of plastic material and an engaging surface is provided on the contact end 33, so that when the contact end 33 of the valve core 30 comes into contact with the transition segment 111, the engaging surface comes into contact with the inner wall of the transition segment 111, preventing the corners of the structure of the contact end 33 from deforming under the impact of the fluid and reducing the movement gap between the valve core 30 and the valve pipe 10, thereby preventing the valve core 30 from getting stuck.

[0044] Specifically, the valve core 30 has a connecting portion, one end of which is connected to the contact end 33, and the other end of which is connected to the sealing end 34. The diameter of the connecting portion is larger than the diameter of the contact end 33, and when the contact end 33 contacts the transition segment 111, there is an axial gap between the connecting portion and the transition segment 111. By providing the valve core as described above, when fluid flows from the valve port 21 to the valve core 30, the contact end 33 of the valve core 30 contacts the transition segment 111 under the impact of the fluid, and the connecting portion and the transition segment 111 are spaced apart in the axial direction. This prevents the outermost edge of the connecting portion from contacting the connection point between the straight segment 112 and the transition segment 111, prevents the outer end of the connecting portion that is close to the transition segment 111 from getting caught on the transition segment 111, and improves the stability of the one-way valve.

[0045] Furthermore, the valve core 30 includes a main body 31 and a plurality of support projections 32, the plurality of support projections 32 are provided on the outer wall of the main body 31 at annular intervals along the circumferential direction of the main body 31, the support projections 32 extend along the axial direction of the main body 31, and the support projections 32 have opposing connecting ends and free ends, the free ends are located on one side of the main body 31 away from the valve opening 21 and protrude from the end of the main body 31, the free ends form a contact end 33, the end of the main body 31 close to the valve opening 21 forms a sealing end 34, the connecting ends are located in the middle of the main body 31, the plurality of support projections 32 engage with the inner wall of the valve pipe 10 to guide the valve core 30, and a flow passage is formed between two adjacent support projections 32. As described above, when the fluid flow direction is from the valve port 21 to the valve core 30, the fluid can flow through the flow passage formed between two adjacent protrusions into the system pipeline. The support protrusions 32 also act as guides for the valve core 30 as it moves within the valve pipe 10, improving the stability of the valve core 30 as it moves within the valve pipe 10. Specifically, the number of support protrusions 32 may be set to three or more.

[0046] Specifically, in this application, the portion of the main body 31 excluding the sealing end 34 and the portion of the support projection 32 excluding the contact end 33 both form a connection portion.

[0047] In this application, the inner diameter of one end of the valve port 21 that is close to the valve core 30 gradually increases in the direction approaching the valve core 30. This configuration increases the sealing area between the sealing end 34 and the valve port 21, preventing fluid leakage from the valve port 21 when the valve core 30 closes the valve port 21. It also increases the force-bearing area of ​​the valve seat 20 at the valve port 21, preventing deformation of the valve port 21 under the impact of a relatively high-pressure fluid on the valve core 30. Specifically, an arc-shaped structure or chamfered structure may be provided at one end of the valve port 21 that is close to the valve core 30, and a corresponding arc-shaped structure or chamfered structure may be provided on the end face of the sealing end 34.

[0048] The one-way valve provided in this application has the following advantages compared to one-way valves in the prior art. 1. In this application, by providing the valve seat 20 between the first pipe segment 11 and the second pipe segment 12, the risk of fracture at the grooved portion, as in related technologies, can be avoided, and the overall stability of the one-way valve can be improved. 2. In this application, by providing a limiting structure to the valve seat 20, positioning during welding work becomes easier, and the stability of the valve seat 20 relative to the first pipe segment 11 and the second pipe segment 12 can be improved. 3. In this application, by providing a contact end on the valve core 30 and ensuring that the diameter of the connection portion of the valve core 30 is larger than the diameter of the contact end, the outermost edge of the connection portion is prevented from contacting the connection point between the straight segment and the transition segment, preventing the outer end of the connection portion that is close to the transition segment from getting caught on the transition segment, thereby improving the operational stability of the one-way valve.

[0049] It should be noted that the terminology used herein is solely for the purpose of describing specific embodiments and is not intended to limit the exemplary embodiments provided herein. Unless otherwise clearly indicated in the context, the singular form is intended to include the plural form, as used herein, and furthermore, it should be understood that where the terms “contains” and / or “includes” are used herein, they also indicate the presence of features, steps, operations, devices, assemblies and / or combinations thereof.

[0050] Unless otherwise specifically stated, the relative arrangements, formulas, and numerical values ​​of the components and steps described in these embodiments do not limit the scope of this application. At the same time, for the sake of clarity, it should be understood that the dimensions of the parts shown in the drawings are not drawn according to actual proportional relationships. While we do not discuss in detail any art, methods, and equipment already known to those skilled in the art, such art, methods, and equipment should be considered as part of the permitted specification where necessary. In all the examples shown and discussed herein, any specific values ​​are merely illustrative and should not be interpreted as restrictive. Accordingly, other examples in the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters indicate similar elements in subsequent drawings, and therefore, once an element is defined in one drawing, no further explanation is required for it in subsequent drawings.

[0051] In the description of this application, directions or positional relationships indicated by directional terms such as "front," "back," "up," "down," "left," "right," "lateral," "vertical," "horizontal," and "top" and "bottom" are usually directions or positional relationships based on the illustrations and are merely for the convenience and simplification of the description of this application. Unless otherwise stated, these directional terms do not indicate or imply that the specified device or element has a particular direction or must be configured and operated in a particular direction, and should not be understood as limiting the scope of protection of this application. The directional terms "inside" and "outside" should be understood as meaning inside and outside with respect to the contour of each component itself.

[0052] For the sake of clarity, spatially relative terms such as "on top of," "above," "on the top surface," and "on the top surface" may be used here to describe the spatial relationship between one illustrated device or feature and another. Spatially relative terms should be understood as intended to include different orientations of the device in use or operation, in addition to the orientation described in the drawing. For example, if the device in the drawing is reversed, a device described as "above another device or structure" or "on top of another device or structure" will subsequently be positioned as "below another device or structure" or "below another device or structure." Thus, the exemplary term "above" may include both the orientations of "above" and "below." The device may be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here may be interpreted accordingly.

[0053] Furthermore, it should be explained that the use of words such as "first," "second," etc., to specify parts is simply to easily distinguish corresponding parts, and unless otherwise stated, the aforementioned words do not have any special meaning and should not be understood as limiting the scope of protection of this application.

[0054] The foregoing describes preferred embodiments of this application and is not intended to limit it. Those skilled in the art can make various modifications and changes to this application. Any modifications, equivalent substitutions, improvements, etc., made within the scope of the intent and principles of this application shall be included within the scope of protection of this application.

Claims

1. A valve pipe (10) having a first pipe segment (11) and a second pipe segment (12), A valve seat (20) provided between the first pipe segment (11) and the second pipe segment (12), wherein the valve seat (20) is located at the connection point between the first pipe segment (11) and the second pipe segment (12), the valve seat (20) has a valve opening (21), and the first pipe segment (11) and the second pipe segment (12) communicate with each other through the valve opening (21), A one-way valve comprising a valve core (30) movably provided within the first pipe segment (11) or the second pipe segment (12), wherein the valve core (30) is provided facing the valve port (21), and the valve core (30) is capable of adjusting the flow rate at the valve port (21).

2. The one-way valve according to claim 1, wherein the first pipe segment (11) has a first communication port and a first port provided opposite to it, the second pipe segment (12) has a second communication port and a second port provided opposite to it, one end of the valve seat (20) is welded to the first port, and the other end of the valve seat (20) is welded to the second port.

3. A one-way valve according to claim 2, wherein a limiting structure is provided between the valve seat (20) and the first pipe segment (11) and the second pipe segment (12).

4. A one-way valve according to claim 2, wherein a limiting structure is provided between the valve seat (20) and the first pipe segment (11) or the second pipe segment (12).

5. The one-way valve according to claim 3, wherein the valve seat (20) has a first end face and a second end face provided opposite to each other, the first end face is provided with a first projection, the periphery of which abuts against the inner wall of the first pipe segment (11), and / or the second end face is provided with a second projection, the periphery of which abuts against the inner wall of the second pipe segment (12).

6. The one-way valve according to claim 1, wherein the valve seat (20) is pressed and fitted into the valve pipe (10), and the valve seat (20) is welded and fixed to the valve pipe (10).

7. The one-way valve according to claim 6, wherein the first pipe segment (11) has a first connecting end, the second pipe segment (12) has a second connecting end, the valve seat (20) is welded and fixed to the first pipe segment (11), and the end face of the first connecting end is welded and fixed to the end face of the second connecting end.

8. The one-way valve according to claim 7, wherein the valve core (30) is movably provided within the first pipe segment (11).

9. A fixing groove is provided in an annular shape on the inner wall of the second pipe segment (12), the fixing groove is located at the second connecting end, and the valve seat (20) is fixed within the fixing groove, as described in claim 7.

10. The one-way valve according to claim 1, wherein the first pipe segment (11) includes a linear segment (112) and a transition segment (111) connected to each other, one end of the linear segment (112) away from the transition segment (111) is connected to the second pipe segment (12), the flow area of ​​the transition segment (111) gradually decreases in the direction away from the valve opening (21), and the valve core (30) is movably provided within the linear segment (112).

11. The one-way valve according to claim 10, wherein the valve core (30) has a contact end (33) and a sealing end (34) provided opposite to each other, the sealing end (34) is provided facing the valve port (21) and engages with the valve port (21) to adjust the flow rate at the valve port (21), the outer diameter of the contact end (33) is larger than the minimum inner diameter of the transition segment (111), and the contact end (33) engages with the inner wall of the transition segment (111) to restrict the displacement of the valve core (30).

12. The one-way valve according to claim 11, wherein the outer wall of the contact end (33) has an engagement surface, the distance between the engagement surface and the axis of the valve core (30) gradually decreases in the direction away from the valve opening (21), and the engagement surface is engaged with and restricted by the inner wall of the transition segment (111).

13. The one-way valve according to claim 12, wherein the valve core (30) has a connecting portion, one end of the connecting portion is connected to the abutment end (33), the other end of the connecting portion is connected to the sealing end (34), the diameter of the connecting portion is larger than the diameter of the abutment end (33), and when the abutment end (33) is in contact with the transition segment (111), there is an axial gap between the connecting portion and the transition segment (111).

14. The valve core (30) includes a body (31) and a plurality of support projections (32), the plurality of support projections (32) are provided on the outer wall of the body (31) at annular intervals along the circumferential direction of the body (31), the support projections (32) extend along the axial direction of the body (31), and the support projections (32) have opposing connecting ends and free ends, the free ends are located on one side of the body (31) away from the valve opening (21), and front A one-way valve according to claim 11, wherein the support projections (32) are provided protruding from the end of the main body (31), the free end of which forms the contact end (33), one end of the main body (31) adjacent to the valve port (21) forms the sealing end (34), the connecting end is located in the middle of the main body (31), and a plurality of the support projections (32) engage with the inner wall of the valve pipe (10) to guide the valve core (30), and a flow passage is formed between two adjacent support projections (32).

15. The one-way valve according to claim 1, wherein the inner diameter of one end of the valve port (21) that is close to the valve core (30) gradually increases in the direction approaching the valve core (30).

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