Check valve

Abstract

A check valve, comprising a valve seat (100), a first valve pipe (300) and a valve core (400), wherein the valve seat comprises a first assembly portion (120), the first assembly portion has a first assembly surface perpendicular to the axial direction of the check valve, and the valve seat is provided with a valve hole (101) passing through the valve seat in the axial direction; the first valve pipe is provided with a first valve cavity (301), one end portion of the first valve pipe is connected to the first assembly surface, at least part of the valve seat is located outside the first valve pipe, and the first valve cavity is communicated with the valve hole; the valve core is movably arranged in the first valve cavity.

Description

one-way valve

[0001] Cross-references

[0002] This disclosure claims priority to Chinese patent application No. 202510088800.1, filed on January 20, 2025, entitled “One-way valve”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of valve technology, and more particularly to a one-way valve. Background Technology

[0004] In existing one-way valve designs, the valve comprises a valve body, a valve seat, and a valve core. The valve body features a large inner diameter in the middle section and small inner diameters at both ends. The valve seat and valve core are respectively housed within the valve body. In existing designs, the valve seat has an annular groove around its periphery. Furthermore, the valve body is machined using tools such as external rollers to deform the valve wall inward and embed it into the annular groove of the valve seat, thus securing the valve body to the seat. However, this method of fixing the valve body and seat has poor stability and carries the risk of the valve wall being thinned during the machining process, affecting structural strength or even breaking off. Additionally, the machining of the valve body can easily lead to internal leakage in the gap between the valve body and the valve seat. Summary of the Invention

[0005] According to one aspect of this disclosure, a one-way valve is provided, including a valve seat, a first valve tube, and a valve core; the valve seat includes a first mounting portion having a first mounting surface perpendicular to the axial direction of the one-way valve, and the valve seat is provided with a valve hole extending axially; the first valve tube has a first valve cavity, one end of the first valve tube is connected to the first mounting surface, at least a portion of the valve seat is located outside the first valve tube, and the first valve cavity communicates with the valve hole; the valve core is movably disposed in the first valve cavity. Attached Figure Description

[0006] The various objectives, features, and advantages of this disclosure will become more apparent from the following detailed description of preferred embodiments of the disclosure taken in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of the disclosure and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein:

[0007] Figure 1 is a perspective view of a one-way valve according to an exemplary embodiment;

[0008] Figure 2 is a three-dimensional exploded view of Figure 1;

[0009] Figure 3 is an axonometric sectional view of Figure 1;

[0010] Figures 4 and 5 are three-dimensional schematic diagrams of the valve seat shown in Figure 2 from two different perspectives;

[0011] Figure 6 is a three-dimensional enlarged schematic diagram of a portion of the one-way valve shown in Figure 1;

[0012] Figures 7 and 8 are three-dimensional schematic diagrams of the valve core shown in Figure 2 from two different perspectives;

[0013] Figure 9 is a partial cross-sectional view of the valve core shown in Figure 2;

[0014] Figure 10 is a planar schematic diagram of the limiting structure shown in Figure 2;

[0015] Figures 11 and 12 are schematic plan views of the limiting structure of a one-way valve according to two other exemplary embodiments.

[0016] Figure 13 is a perspective view of a one-way valve according to another exemplary embodiment;

[0017] Figure 14 is a three-dimensional exploded view of Figure 13;

[0018] Figure 15 is an axonometric sectional view of Figure 13.

[0019] The reference numerals in the attached drawings are explained as follows: 100. Valve seat; 101. Valve hole; 102. Assembly hole; 110. Second assembly part; 111. Second stepped surface; 120. First assembly part; 121. First stepped surface; 200. Second valve pipe; 201. Second valve cavity; 300. First valve pipe; 301. First valve cavity; 310. First part; 320. Second part; 330. Transition surface; 400. Valve core; 410. Body; 411. Weight reduction hole; 420. Tail wing; 510. Second connector; 520. First connector; 600. Limiting structure; 610. Limiting arm; 620. Connecting arm; 621. Limiting protrusion. Detailed Implementation

[0020] Typical embodiments embodying the features and advantages of this disclosure will be described in detail in the following description. It should be understood that this disclosure can have various variations in different embodiments without departing from the scope of this disclosure, and the descriptions and drawings therein are illustrative in nature and not intended to limit this disclosure.

[0021] In the following description of various exemplary embodiments of this disclosure, reference is made to the accompanying drawings, which form part of this disclosure, and which illustrate by way of example different exemplary structures, systems, and steps that can implement various aspects of this disclosure. It should be understood that other specific embodiments of the components, structures, exemplary devices, systems, and steps may be used, and structural and functional modifications may be made without departing from the scope of this disclosure. Furthermore, while the terms “above,” “between,” “within,” etc., may be used in this specification to describe different exemplary features and elements of this disclosure, these terms are used herein only for convenience, such as the orientation according to the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of this disclosure.

[0022] Referring to Figure 1, a perspective view of the one-way valve proposed in this disclosure is shown representatively. In this exemplary embodiment, the one-way valve proposed in this disclosure is illustrated using an oil separator as an example. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the relevant designs of this disclosure to other application scenarios, and these changes are still within the scope of the principle of the one-way valve proposed in this disclosure.

[0023] As shown in Figure 1, in one embodiment of this disclosure, the one-way valve includes a valve seat 100, a first valve tube 300, and a valve core 400. Referring to Figures 2 through 10, Figure 2 represents a perspective exploded view of Figure 1; Figure 3 represents an axonometric sectional view of Figure 1; Figures 4 and 5 represent perspective views of the valve seat 100 from two different perspectives; Figure 6 represents a perspective enlarged view of a portion of the one-way valve structure; Figures 7 and 8 represent perspective views of the valve core 400 from two different perspectives; Figure 9 represents a partial sectional view of the valve core 400; and Figure 10 represents a plan view of the limiting structure 600. The structure, connection method, and functional relationship of the main components of the one-way valve proposed in this disclosure will be described in detail below with reference to the above figures.

[0024] As shown in Figures 1 to 5, in one embodiment of this disclosure, the valve seat 100 includes a first mounting portion 120, which has a first mounting surface perpendicular to the axial direction of the one-way valve, and the valve seat 100 is provided with a valve hole 101 extending axially. A first valve tube 300 has a first valve cavity 301, and one end of the first valve tube 300 is connected to the first mounting surface of the first mounting portion 120, such that at least a portion of the valve seat 100 is located outside the first valve tube 300. The first valve tube 300 may, for example, be a straight tube. The first valve cavity 301 communicates with the valve hole 101 of the valve seat 100. The valve core 400 is movably disposed in the first valve cavity 301. The portion of the valve seat 100 facing the first valve tube 300 and located within the first valve cavity 301 can cooperate with the valve core 400 for sealing the valve core 400. Through the above design, this disclosure connects the first valve tube 300 to the first assembly portion 120 of the valve seat 100, with the valve seat 100 portion located outside the first valve tube 300. Accordingly, this disclosure ensures an effective connection between the first valve tube 300 and the valve seat 100, improves the stability of the connection structure, avoids the impact of rotary engraving on the structural strength of the product, and prevents internal leakage at the connection point between the one-way valve and the valve seat 100.

[0025] As shown in Figures 3 and 4, in one embodiment of this disclosure, the first assembly portion 120 of the valve seat 100 may be provided with a first step structure. The first step structure has a first step surface 121 perpendicular to the axial direction, and the first step surface 121 is annular. The first step surface 121 can serve as the aforementioned first assembly surface, that is, one end of the first valve tube 300 is connected to the first step surface 121. Through the above design, this disclosure can achieve planar docking between the first assembly portion 120 and the first valve tube 300. When using, for example, laser welding process to connect the valve seat 100 and the first valve tube 300, it is more conducive to the implementation of the laser welding process, and it is suitable for realizing the assembly process of docking the end of the first valve tube 300 with the first step structure and then welding and fixing it. The process is simple and does not require a pre-positioning fixture.

[0026] In one embodiment of this disclosure, the valve seat 100 and the first valve tube 300 can be connected by a welding process, such as a fusion welding process, specifically a laser welding process, an argon arc welding process, etc.

[0027] In one embodiment of this disclosure, the valve seat 100 can be made of carbon steel or stainless steel. Through the above design, since the valve seat 100 is made of stainless steel or similar materials, this disclosure makes the valve seat 100 suitable for connection to the first valve pipe 300 via welding processes such as laser welding, which helps reduce process difficulty and cost. Furthermore, since stainless steel is less expensive than other metal materials (such as copper), this disclosure makes the material cost of the check valve even lower, further meeting market demands.

[0028] In one embodiment of this disclosure, the first valve tube 300 can be made of carbon steel or stainless steel. Through the above design, since the first valve tube 300 is made of stainless steel or similar materials, this disclosure makes the first valve tube 300 suitable for connection to the valve seat 100 via welding processes such as laser welding, which helps reduce process difficulty and cost. Furthermore, since stainless steel is less expensive than other metal materials (such as copper), this disclosure makes the material cost of the one-way valve even lower, further meeting market demands.

[0029] In one embodiment of this disclosure, the wall of the valve orifice 101 may be provided with a first sealing surface, which may be, for example, an arc surface. Furthermore, the periphery of the valve core 400 may be provided with a second sealing surface, which may be, for example, an inclined surface. Accordingly, the first sealing surface and the second sealing surface are in a sealing fit. In some embodiments, the first sealing surface may also be an inclined surface, and the second sealing surface may also be an arc surface; this is not limited to this embodiment.

[0030] In one embodiment of this disclosure, the valve core 400 may be made of plastic, such as nylon or PPS (Polyphenylene sulfide).

[0031] Referring to Figures 13 to 15, Figure 13 shows a perspective view of a one-way valve that embodies the principles of this disclosure in another exemplary embodiment; Figure 14 shows a perspective exploded view of Figure 13; and Figure 15 shows an axonometric sectional view of Figure 13.

[0032] As shown in Figures 13 to 15, in one embodiment of this disclosure, the one-way valve may further include a first connector 520, which is connected to the end of the first valve tube 300 away from the valve seat 100. With this design, the one-way valve can utilize the first connector 520 to connect the first valve tube 300 to related components.

[0033] Based on the design of the one-way valve including the first connector 520, in one embodiment of this disclosure, taking the material of the first valve pipe 300 as stainless steel as an example, the material of the first connector 520 can be copper, specifically, for example, red copper or brass. Through the above design, for application scenarios where the material of related components is copper, such as when the material of air conditioning system components and pipes is copper, this disclosure can utilize the first connector 520 to achieve an effective connection between the first valve pipe 300 and related components.

[0034] In other embodiments of this disclosure, when the material of the relevant components is stainless steel, the one-way valve proposed in this disclosure may not have the first connector 520. In this case, the end of the first valve pipe 300 away from the valve seat 100 can be directly connected to the relevant components, and is not limited to the above embodiments.

[0035] Based on the design of the one-way valve, which also includes a first connector 520, in one embodiment of this disclosure, the first connector 520 and the first valve pipe 300 can be connected by a brazing process.

[0036] As shown in Figures 1 to 3, in one embodiment of this disclosure, the first valve tube 300 includes a first portion 310 and a second portion 320 connected axially. Specifically, the inner diameter of the first portion 310 is larger than the inner diameter of the second portion 320. It should be understood that the above description of the inner diameter of different portions of the first valve tube 300 does not limit the appearance of the first valve tube 300. For example, the first valve tube 300 may have a shape with one side having a larger diameter and the other side having a smaller diameter, as shown in the figures, or it may have a shape with a uniform outer diameter, or it may have various other possible shapes. A transition surface 330 is formed on the inner wall of the first valve tube 300 at the connection between the first portion 310 and the second portion 320. Based on this, the end of the first portion 310 away from the second portion 320 is connected to the first assembly portion 120. The valve core 400 moves axially toward or away from the valve seat 100 to block or open the valve hole of the valve seat 100. For example, when the valve core 400 moves axially toward the valve seat 100 to the maximum stroke, the valve core 400 (e.g., the body 410 of the valve core 400) abuts against the valve seat 100 and is restricted from continuing to move toward the valve seat 100. At this time, the valve core 400 blocks the valve hole.

[0037] Based on this, when the medium flows from the first part 310 to the second part 320 (i.e., forward), under the pressure of the medium, the valve core 400 moves away from the valve seat 100 and is spaced apart from the valve seat 100. At this time, the medium entering through the valve hole 101 can flow through the flow channel between the valve core 400 and the first valve tube 300 (for example, the flow channel between the body 410 and the inner wall of the first valve tube 300 that is not occupied by the tail fin 420, and the flow space formed between adjacent tail fins and the inner wall of the valve tube, which is also the flow channel), and can be discharged through the second part 320. Furthermore, when the medium flows from the second part 320 to the first part 310 (i.e., reverse), under the pressure of the medium, the valve core 400 moves towards the valve seat 100 and contacts the valve seat 100. At this time, the valve core 400 blocks the valve hole 101, and the valve core 400 can prevent the medium from flowing, preventing reverse flow in the outlet pipe.

[0038] As shown in Figures 2, 3, and 6 to 10, in one embodiment of this disclosure, the valve core 400 includes a body 410 and at least two tail wings 420. The tail wings 420 are connected to the periphery of the body 410 and extend axially away from the valve seat 100. The at least two tail wings 420 are arranged circumferentially spaced along the body 410. Based on this, the one-way valve proposed in this disclosure also includes a limiting structure 600. The limiting structure 600 is disposed in the first valve cavity 301 and can restrict the circumferential rotation of the valve core 400. Through the above design, this disclosure can use the limiting structure 600 to restrict the circumferential rotation of the valve core 400. Furthermore, by using the design of at least two tail wings 420, the flow space between the valve core 400 and the first valve cavity 301 is divided into at least two flow channels, which helps to improve the stability of the valve core 400 moving axially within the first part 310 and further reduces the risk of valve core 400 deflection.

[0039] As shown in Figures 6 and 10, based on the design of the one-way valve including the limiting structure 600, in one embodiment of this disclosure, the limiting structure 600 may include a limiting arm 610. The limiting arm 610 is fixed in the first valve chamber 301, specifically located in the first valve chamber 301 of the first part 310, and a portion of the limiting arm 610 is located in the area between two adjacent tail fins 420. With the above design, when the valve core 400 rotates circumferentially by a certain angle, the tail fins 420 abut against the limiting arm 610, preventing the valve core 400 from continuing to rotate.

[0040] As shown in Figures 3 and 6, based on the design of the limiting structure 600 including the limiting arm 610, in one embodiment of this disclosure, the limiting arm 610 extends axially, and one end of the limiting arm 610 can be connected to the valve seat 100. Through the above design, this disclosure connects the limiting arm 610 to the valve seat 100, and uses the valve seat 100 to fix the limiting arm 610, resulting in a reliable connection and a simple structure.

[0041] As shown in Figures 4 and 6, based on the design of the limiting arm 610 connecting to the valve seat 100, in one embodiment of this disclosure, a mounting hole 102 can be provided on the end face of the valve seat 100 facing the valve core 400, and one end of the limiting arm 610 can be inserted into the mounting hole 102. Through the above design, this disclosure further optimizes the connection effect between the limiting arm 610 and the valve seat 100.

[0042] As shown in Figure 3, based on the design of the limiting arm 610 being connected to the valve seat 100, in one embodiment of this disclosure, the other end of the limiting arm 610 (i.e., the end away from the valve seat 100) can abut against the transition surface 330 of the first valve tube 300. Through the above design, this disclosure utilizes the valve seat 100 to connect one end of the limiting arm 610 and utilizes the transition surface 330 of the first valve tube 300 to stop the other end of the limiting arm 610, thereby fixing the limiting arm 610 within the first valve cavity 301 of the first part 310, further optimizing the assembly effect of the limiting arm 610, and thus ensuring the rotation restriction of the valve core 400.

[0043] As shown in Figures 6 and 10, based on the design of the limiting structure 600 including limiting arms 610, in one embodiment of this disclosure, the limiting structure 600 may include two limiting arms 610. The ends of these two limiting arms 610 away from the valve seat 100 are connected via a connecting arm 620, and the connecting arm 620 is located on the side of the valve core 400 away from the valve seat 100, that is, the limiting structure 600 may be in the shape of a "U". Accordingly, the connecting arm 620 is used to limit the movement of the valve core 400 away from the valve seat 100 along the axial direction. That is, when the valve core 400 moves away from the valve seat 100 along the axial direction to the maximum stroke position, the valve core 400 (e.g., the body 410 of the valve core 400) abuts against the connecting arm 620 and is restricted from continuing to move away from the valve seat 100.

[0044] Referring to Figures 11 and 12, which respectively show schematic plan views of the limiting structure 600 of the one-way valve embodying the principles of this disclosure in two other exemplary embodiments.

[0045] As shown in Figures 11 and 12, based on the design of the limiting structure 600 including the connecting arm 620, in some embodiments of this disclosure, the connecting arm 620 may form a limiting protrusion 621, which protrudes toward the valve core 400 to limit the maximum stroke of the valve core 400 along the axial direction. With this design, when the valve core 400 slides axially away from the valve seat 100 to its maximum position, the connecting arm 620 can abut against the body 410 of the valve core 400 to stop the axial sliding of the valve core 400. Furthermore, by utilizing the design of the limiting protrusion 621, this disclosure can shorten the axial sliding stroke of the valve core 400, avoid the valve core 400 jamming caused by the misalignment due to continuous sliding, and also reduce the sliding noise of the valve core 400.

[0046] Based on the design of the limiting protrusion 621 formed by the connecting arm 620, in one embodiment of this disclosure, the limiting protrusion 621 can be rectangular (as shown in FIG. 11), triangular (as shown in FIG. 12), or arc-shaped, etc. Specifically, the protrusion can be formed by bending the connecting arm 620 toward the valve seat 100 as shown in the figure, and only one protruding end needs to be formed, without limiting the specific shape.

[0047] In other embodiments not illustrated in this disclosure, the limiting structure 600 may further include a limiting strip disposed on the inner wall of the first valve cavity 301 and arranged axially. A portion of the limiting strip is located in the area between two adjacent tail fins 420 to restrict the circumferential rotation of the valve core 400. The limiting strip may be integral with the first valve tube 300, or it may be fixed to the inner wall of the first valve tube 300 using a connection process such as spot welding.

[0048] In other embodiments not illustrated in this disclosure, the limiting structure 600 may further include limiting ribs. These ribs are disposed on the inner wall of the first valve cavity 301 and arranged axially. A portion of the limiting rib is located in the area between two adjacent tail fins 420 to restrict the circumferential rotation of the valve core 400. For example, multiple dotted grooves or strip grooves can be pressed inwards from the inner wall of the first part 310 as limiting ribs. The multiple dotted grooves can be distributed axially to be disposed within the gap between any two tail fins 420. When the valve core 400 tends to rotate circumferentially, a circumferential stop is formed between the limiting rib and the tail fin 420, thereby achieving the limiting function of preventing the valve core 400 from rotating. Alternatively, the strip groove can extend axially to achieve the limiting function of preventing the valve core 400 from rotating.

[0049] As shown in Figures 6 to 9, based on the design of the valve core 400 including the body 410 and the tail fin 420, in one embodiment of this disclosure, the valve core 400 may be provided with at least three tail fins 420, such as, but not limited to, the three tail fins 420 shown in the figures, and any two tail fins 420 are arranged at intervals. Through the above design, since the tail fins 420 can divide the flow space between the valve core 400 and the inner wall of the first valve tube 300 into multiple flow channels, increasing the number of tail fins 420 in this disclosure, such as three or more, allows the flow space to be divided into more flow channels, which is beneficial to improving the axial sliding stability of the valve core 400 and further reducing the risk of valve core 400 deflection.

[0050] As shown in Figures 7 to 9, in one embodiment of this disclosure, the valve core 400 may be provided with a weight-reducing hole 411. For example, the weight-reducing hole 411 may be provided on the body 410 of the valve core 400. Through the above design, this disclosure can reduce the weight of the valve core 400 and reduce the material cost of the valve core 400.

[0051] As shown in Figures 1 to 3, in one embodiment of this disclosure, the valve seat 100 may further include a second mounting portion 120. The second mounting portion 110 and the first mounting portion 120 are arranged axially. The second mounting portion 110 has a second mounting surface perpendicular to the axial direction, and the orientation of the second mounting surface is opposite to that of the first mounting surface. Furthermore, the one-way valve proposed in this disclosure also includes a second valve tube 200. The second valve tube 200 has a second valve cavity 201. One end of the second valve tube 200 is connected to the second mounting surface of the second mounting portion 110. The second valve cavity 201 communicates with the first valve cavity 301 via a valve hole 101. The second valve tube 200 may, for example, be a straight pipe structure.

[0052] As shown in Figures 3 and 5, based on the design of the one-way valve including the second valve tube 200, in one embodiment of this disclosure, the second assembly portion 110 of the valve seat 100 can be provided with a second step structure. The second step structure has a second step surface 111 perpendicular to the axial direction, and the second step surface 111 is annular. The second step surface 111 can serve as the aforementioned second assembly surface, that is, one end of the second valve tube 200 is connected to the second step surface 111. Through the above design, this disclosure can achieve planar docking between the second assembly portion 110 and the second valve tube 200. When using, for example, laser welding process to connect the valve seat 100 and the second valve tube 200, it is more conducive to the implementation of the laser welding process.

[0053] Based on the design of the one-way valve including the second valve tube 200, in one embodiment of this disclosure, the valve seat 100 and the second valve tube 200 can be connected by a welding process, such as a fusion welding process, specifically a laser welding process, an argon arc welding process, etc.

[0054] Based on the design of the check valve including the second valve tube 200, in one embodiment of this disclosure, the material of the second valve tube 200 can be carbon steel or stainless steel. Through this design, since the second valve tube 200 is made of stainless steel or similar materials, this disclosure makes the second valve tube 200 suitable for connection to the valve seat 100 via welding processes such as laser welding, which helps reduce process difficulty and cost. Furthermore, since stainless steel is less expensive than other metal materials (such as copper), this disclosure makes the material cost of the check valve even lower, further meeting market demands.

[0055] As shown in Figures 13 to 15, taking the design of a one-way valve including a second valve tube 200 as an example, in one embodiment of this disclosure, the one-way valve may further include a second connector 510, which is connected to the end of the second valve tube 200 away from the valve seat 100. Through the above design, the one-way valve can utilize the second connector 510 to connect the second valve tube 200 to related components.

[0056] Based on the design of the one-way valve including the second connector 520, in one embodiment of this disclosure, taking the material of the second valve pipe 200 as stainless steel as an example, the material of the second connector 510 can be copper, specifically, for example, red copper or brass. Through the above design, for application scenarios where the material of related components is copper, such as when the materials of air conditioning system components and pipes are copper, this disclosure can utilize the second connector 510 to achieve an effective connection between the second valve pipe 200 and the related components. In other embodiments of this disclosure, when the material of the related components is stainless steel, the one-way valve proposed in this disclosure may not have the second connector 510, in which case the end of the second valve pipe 200 away from the valve seat 100 can be directly connected to the related components, and is not limited to the above embodiments.

[0057] Based on the design of the one-way valve, which also includes a second connector 510, in one embodiment of this disclosure, the second connector 510 and the second valve pipe 200 can be connected by a brazing process.

[0058] Based on the design of the one-way valve including the second valve tube 200, in one embodiment of this disclosure, the inner diameter of the second valve tube 200 may be greater than or equal to the diameter of the valve hole 101.

[0059] Based on the design of the one-way valve including the second valve tube 200, in one embodiment of this disclosure, when the first valve tube 300 includes a first part 310 and a second part 320, the inner diameter of the second part 320 may be greater than or equal to the inner diameter of the second valve tube 200.

[0060] It should be noted that the check valves shown in the accompanying drawings and described in this specification are merely a few examples among many check valves capable of employing the principles of this disclosure. It should be clearly understood that the principles of this disclosure are by no means limited to any detail or component of the check valves shown in the accompanying drawings or described in this specification.

[0061] In summary, the one-way valve proposed in this disclosure includes a valve seat 100, a first valve tube 300, and a valve core 400. The valve seat 100 includes a first mounting portion 120, which has a first mounting surface perpendicular to the axial direction of the one-way valve. One end of the first valve tube 300 is connected to the first mounting surface, at least a portion of the valve seat 100 is located outside the first valve tube 300, and a first valve cavity 301 communicates with a valve hole 101. The valve core 400 is movably disposed in the first valve cavity 301. Through the above design, this disclosure connects the first valve tube 300 to the first mounting portion 120 of the valve seat 100, and at least a portion of the valve seat 100 is located outside the first valve tube 300. Accordingly, this disclosure can ensure an effective connection between the first valve tube 300 and the valve seat 100, improve connection stability, avoid the impact of rotary engraving on the structural strength of the product, and avoid internal leakage problems at the connection between the one-way valve and the first valve tube 300 and the valve seat 100.

[0062] The exemplary embodiments of the one-way valve proposed in this disclosure have been described and / or illustrated in detail above. However, the embodiments of this disclosure are not limited to the specific embodiments described herein; rather, components and / or steps of each embodiment may be used independently and separately from other components and / or steps described herein. Each component and / or step of one embodiment may also be used in combination with other components and / or steps of other embodiments. In describing the elements / components / etc. described and / or illustrated herein, the terms “a,” “an,” and “the above” are used to indicate the presence of one or more elements / components / etc. The terms “comprising,” “including,” and “having” are used to indicate an open-ended inclusion and mean that additional elements / components / etc. may exist in addition to those listed. The terms “first” and “second,” etc., in the claims and specification are used only as illustrative marks and are not intended to limit the numerical scope of the object.

[0063] Although the one-way valves proposed in this disclosure have been described with respect to different specific embodiments, those skilled in the art will recognize that modifications may be made to the implementation of this disclosure within the spirit and scope of the claims.

Claims

1. A one-way valve, characterized in that, include: The valve seat (100) includes a first mounting portion (120) having a first mounting surface perpendicular to the axial direction of the one-way valve, and the valve seat (100) is provided with a valve hole (101) that extends through the axial direction. A first valve tube (300) having a first valve cavity (301) is connected at one end to the first mounting surface such that at least a portion of the valve seat (100) is located outside the first valve tube (300), and the first valve cavity (301) is connected to the valve hole (101). The valve core (400) is movably disposed in the first valve chamber (301).

2. The one-way valve according to claim 1, characterized in that, The first assembly part (120) is provided with a first step structure, the first step structure has a first step surface (121) perpendicular to the axial direction, the first step surface (121) is annular, and the first step surface (121) is the first assembly surface.

3. The one-way valve according to claim 1, characterized in that, The valve seat (100) is connected to the first valve tube (300) by a welding process.

4. The one-way valve according to claim 1, characterized in that: The valve seat (100) is made of carbon steel or stainless steel; and / or The first valve tube (300) is made of carbon steel or stainless steel.

5. The one-way valve according to claim 1, characterized in that, The first valve tube (300) is made of stainless steel; the one-way valve also includes a first connector (520), which is connected to the end of the first valve tube (300) away from the valve seat (100).

6. The one-way valve according to claim 1, characterized in that, The first valve tube (300) includes a first part (310) and a second part (320) connected axially; the inner diameter of the first part (310) is larger than the inner diameter of the second part (320), and the inner wall of the first valve tube (300) forms a transition surface (330) at the connection between the first part (310) and the second part (320); the end of the first part (310) away from the second part (320) is connected to the first assembly part (120); the valve core (400) moves axially toward or away from the valve seat (100) to block or open the valve hole of the valve seat (100).

7. The one-way valve according to claim 6, characterized in that, The valve core (400) includes a body (410) and at least two tail fins (420); the tail fins (420) are connected to the periphery of the body (410) and extend axially away from the valve seat (100), and the at least two tail fins (420) are arranged circumferentially around the body (410); wherein: the one-way valve further includes: A limiting structure (600) is disposed in the first valve chamber (301) to limit the circumferential rotation of the valve core (400).

8. The one-way valve according to claim 7, characterized in that, The limiting structure (600) includes a limiting arm (610) fixed in the first valve chamber (301), and a portion of the limiting arm (610) is located in the region between two adjacent tail fins (420).

9. The one-way valve according to claim 8, characterized in that, The limiting arm (610) extends axially, with one end connected to the valve seat (100).

10. The one-way valve according to claim 9, characterized in that, The valve seat (100) has an assembly hole (102) on its end face facing the valve core (400), and one end of the limiting arm (610) is inserted into the assembly hole (102).

11. The one-way valve according to claim 9, characterized in that, The other end of the limiting arm (610) abuts against the transition surface (330).

12. The one-way valve according to claim 8, characterized in that, The limiting structure (600) includes two limiting arms (610), the ends of the two limiting arms (610) away from the valve seat (100) are connected via a connecting arm (620), and the connecting arm (620) is located on the side of the valve core (400) away from the valve seat (100). The connecting arm (620) is used to limit the movement of the valve core (400) away from the valve seat (100) along the axial direction; wherein, the connecting arm (620) forms a limiting protrusion (621), the limiting protrusion (621) protrudes toward the valve core (400), and is used to limit the maximum stroke of the valve core (400) along the axial direction.

13. The one-way valve according to claim 12, characterized in that, The limiting protrusion (621) is rectangular, triangular, or arc-shaped.

14. The one-way valve according to claim 7, characterized in that: The limiting structure (600) includes a limiting strip disposed on the inner wall of the first valve cavity (301) and arranged axially. A portion of the limiting strip is located in the area between two adjacent tail fins (420) to restrict the circumferential rotation of the valve core (400); or, The limiting structure (600) includes a limiting rib, which is disposed on the inner wall of the first valve cavity (301) and arranged axially. A portion of the limiting rib is located in the area between two adjacent tail fins (420) to restrict the circumferential rotation of the valve core (400).

15. The one-way valve according to claim 7, characterized in that, The valve core (400) includes at least three tail fins (420), with any two tail fins (420) arranged at intervals.

16. The one-way valve according to claim 1, characterized in that, The valve seat (100) further includes a second assembly portion (120), the second assembly portion (110) being arranged axially with the first assembly portion (120), the second assembly portion (110) having a second assembly surface perpendicular to the axial direction, the second assembly surface being opposite in orientation to the first assembly surface; the one-way valve further includes: The second valve tube (200) has a second valve cavity (201), one end of which is connected to the second mounting surface, and the second valve cavity (201) is connected to the first valve cavity (301) via the valve hole (101).

17. The one-way valve according to claim 16, characterized in that, The second assembly part (110) is provided with a second step structure, the second step structure has a second step surface (111) perpendicular to the axial direction, the second step surface (111) is annular, and the second step surface (111) is the second assembly surface.

18. The one-way valve according to claim 16, characterized in that, The valve seat (100) and the second valve tube (200) are connected by a welding process.

19. The one-way valve according to claim 16, characterized in that, The material of the second valve tube (200) is carbon steel or stainless steel.

20. The one-way valve according to claim 16, characterized in that, The second valve tube (200) is made of stainless steel; the one-way valve also includes a second connector (510), which is connected to the end of the second valve tube (200) away from the valve seat (100).

21. The one-way valve according to claim 16, characterized in that: The inner diameter of the second valve tube (200) is greater than or equal to the diameter of the valve orifice (101); and / or The first valve tube (300) includes a first part (310) and a second part (320) connected axially; the inner diameter of the first part (310) is larger than the inner diameter of the second part (320), and the inner wall of the first valve tube (300) forms a transition surface (330) at the connection between the first part (310) and the second part (320); the first valve tube (300) is connected to the first assembly part (120) at the end of the first part (310) away from the second part (320); the inner diameter of the second part (320) is greater than or equal to the inner diameter of the second valve tube (200).

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