One-way valve

Abstract

A one-way valve, comprising a mounting base (10) and a valve core assembly (20). The mounting base (10) comprises a mounting cavity (11) having an opening (11a), and a first limiting part (14) is provided on the wall surface of the mounting cavity (11). The valve core assembly (20) comprises a valve body (100), a piston (200), and a blocking member (300). The valve body (100) is arranged in the mounting cavity (11) and comprises a valve cavity (101) having a mounting opening (105). A valve opening (102) is formed in the wall surface of the valve cavity (101). A second limiting part (120) is provided on the peripheral surface of the end of the valve body (100) close to the opening (11a). The second limiting part (120) is in limiting fit with the first limiting part (14) in the axial direction of the valve body (100). The piston (200) is movably arranged in the valve cavity (101) and used for closing the valve opening (102). The blocking member (300) blocks the mounting opening (105).

Description

One-way valve

[0001] Cross-references

[0002] This disclosure claims priority to Chinese patent applications with application number 202420264911.4, filed on February 2, 2024, entitled “One-way valve”, and application number 202420260879.2, entitled “Valve core assembly and one-way valve”. The entire contents of the two Chinese patent applications are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of fluid control technology, and in particular to a one-way valve. Background Art

[0004] A check valve is a valve device that allows fluid to flow in one direction and is widely used in the field of fluid control. A check valve comprises a valve body and a blocking member. The valve body is typically prevented from moving downward by connecting the two members. However, in existing technologies, the connection between the valve body and the blocking member is prone to poor connection. When the force of the fluid acts on the valve body, the valve body can easily separate from the blocking member, causing the check valve to malfunction. Summary of the Invention

[0005] According to one aspect of the present application, a one-way valve is provided, comprising a mounting seat and a valve core assembly. The mounting seat comprises a mounting cavity having an opening, and the wall surface of the mounting cavity is provided with a first limiting portion. The valve core assembly comprises a valve body, a piston, and a blocking member. The valve body is disposed in the mounting cavity and comprises a valve cavity having a mounting port, and the wall surface of the valve cavity is provided with a valve port; the outer peripheral surface of one end of the valve body close to the opening is provided with a second limiting portion, and the second limiting portion cooperates with the first limiting portion in the axial upper limit of the valve body; the piston is movably disposed in the valve cavity for closing the valve port; and the blocking member blocks the mounting port. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] To better understand the present disclosure, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components may have different arrangements as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each drawing. The above and other features and advantages of the present disclosure will become more apparent by describing in detail its exemplary embodiments with reference to the accompanying drawings.

[0007] in:

[0008] FIG1 is an exploded schematic diagram of a one-way valve according to an embodiment of the present application.

[0009] FIG2 shows a cross-sectional view of a one-way valve according to an embodiment of the present application.

[0010] FIG3 is an exploded schematic diagram of the valve core assembly according to an embodiment of the present application.

[0011] FIG4 is a perspective schematic diagram showing a piston according to an embodiment of the present application.

[0012] FIG5 is an exploded schematic diagram showing the valve body and the blocking member.

[0013] FIG6 is a schematic diagram showing that the valve body and the blocking member are connected, and the first clamping structure and the second clamping structure are not clamped into place.

[0014] FIG7 is a schematic diagram showing the first and second clamping structures of the valve body and the blocking member being clamped into place.

[0015] 1. The reference numerals in the accompanying drawings are as follows: 10. mounting seat; 11. mounting cavity; 11a. opening; 12. first flow channel; 13. second flow channel; 14. first limiting portion; 20. valve core assembly; 100. valve body; 101. valve cavity; 102. valve port; 103. first annular groove; 104. second annular groove; 105. mounting port; 106. flow channel port; 107. through hole; 110. first clamping structure; 110a. extension portion; 111. fixing portion; 112. cantilever; 113. buckling portion; 120. second limiting portion; 121. first abutting surface; 130. edge portion; 131. second abutting surface; 200. piston; 210. plug; 220. plug rod; 221. accommodating groove; 230. guide protrusion; 240. flow channel groove; 300, blocking member; 310, sealing portion; 311, third annular groove; 312, guide groove; 320, second clamping structure; 321, notch; 322, clamping groove; 322a, first groove; 322b, second groove; 330, protrusion; 400, elastic member; 510, first sealing ring; 520, second sealing ring; 530, third sealing ring; 540, fourth sealing ring; 600, stop member. DETAILED DESCRIPTION

[0016] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0017] It is understood that the terms "including" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to the process, method, product, or apparatus.

[0018] As shown in Figures 1 and 2, the one-way valve of the present embodiment includes a mounting seat 10 and a valve core assembly 20. The mounting seat 10 includes a mounting cavity 11 having an opening 11a, and a first flow channel 12 and a second flow channel 13 communicating with the mounting cavity 11. At least a portion of the valve core assembly 20 is received within the mounting cavity 11 through the opening 11a.

[0019] The present application does not particularly limit the shape of the mounting base 10 . For example, the shape of the mounting base 10 may be a cube, a cylinder, a prism, or the like.

[0020] As shown in FIG. 2 and FIG. 3 , the valve core assembly 20 of the embodiment of the present application includes a valve body 100 , a blocking member 300 , a piston 200 and an elastic member 400 .

[0021] The valve body 100 has a valve cavity 101 inside, and one axial end of the valve body 100 also has an installation port 105 connected to the valve cavity 101. The other axial end of the valve body 100 also has a through hole 107 connected to the valve cavity 101. The wall surface of the valve cavity 101 is formed with a valve port 102, and the valve port 102 can be arranged close to the through hole 107. The circumferential side wall of the valve body 100 also has a flow channel port 106 connected to the valve cavity 101, wherein the number of the flow channel ports 106 can be one or more. When the number of the flow channel ports 106 is multiple, the multiple flow channel ports 106 can be arranged along the circumference of the valve body 100. The arrangement can be uniform or non-uniform. The valve cavity 101 is connected to the installation cavity 11 through the flow channel port 106.

[0022] The valve body 100 may be shaped as a hollow cylindrical structure, with an installation opening 105 and a through hole 107 at both axial ends of the cylindrical structure, one or more flow channel openings 106 on the side wall of the cylindrical structure, and a valve opening 102 formed on the inner wall surface of the cylindrical structure.

[0023] As shown in Figure 2, the first flow channel 12 and the second flow channel 13 can be perpendicular to each other. The first flow channel 12 communicates with the valve cavity 101 through the flow channel opening 106, and the second flow channel 13 communicates with the valve cavity 101 through the through hole 107. Of course, in other embodiments, the first flow channel 12 and the second flow channel 13 can also be arranged in parallel, and this application does not specifically limit this.

[0024] The piston 200 is movably disposed within the valve cavity 101 of the valve body 100 and is used to close the valve port 102. The blocking member 300 blocks the mounting port 105 to seal the piston 200 within the valve cavity 101 and prevent the piston 200 from escaping from the valve cavity 101. The elastic member 400 may be disposed between the blocking member 300 and the piston 200 to apply an elastic force to the piston 200, causing it to move toward the closed valve port 102.

[0025] When the one-way valve of the embodiment of the present application is working, if no fluid passes through the first flow channel 12 and the second flow channel 13, the piston 200 will always close the valve port 102 under the action of the elastic force of the elastic member 400; if the fluid enters the installation cavity 11 from the second flow channel 13, the fluid acts on the piston 200 through the through hole 107, and the fluid pressure overcomes the elastic force of the elastic member 400, squeezing the piston 200 to start moving, and then opening the valve port 102. At this time, the fluid enters the valve cavity 101 through the valve port 102, and finally flows into the first flow channel 12 through the flow channel port 106; if the fluid enters the installation cavity 11 from the first flow channel 12, the direction of the force acting on the piston 200 by the fluid pressure and the elastic force of the elastic member 400 is downward, so the piston 200 always closes the valve port 102, and the fluid cannot flow out of the second flow channel 13 at this time.

[0026] The elastic member 400 may be a compression spring, one end of which abuts against the blocking member 300 , and the other end of which abuts against the piston 200 .

[0027] A fourth sealing ring 540 may be sleeved on the outer circumference of the piston 200 . The outer circumference of the fourth sealing ring 540 may be in contact with the wall surface of the valve port 102 to achieve sealing between the piston 200 and the valve port 102 .

[0028] As shown in FIG2 , a first sealing ring 510 and a second sealing ring 520 are sleeved around the outer periphery of the valve body 100. The first sealing ring 510 and the second sealing ring 520 are spaced apart along the axial direction of the valve body 100, and the flow channel opening 106 is located between the first sealing ring 510 and the second sealing ring 520. The first sealing ring 510 and the second sealing ring 520 seal between the valve body 100 and the wall of the installation cavity 11.

[0029] It can be understood that the first sealing ring 510 is sealed between the upper part of the valve body 100 and the wall of the installation cavity 11 to prevent the fluid from leaking from the opening 11a, and the second sealing ring 520 is sealed between the lower part of the valve body 100 and the wall of the installation cavity 11 to prevent the fluid in the first flow channel 12 from leaking from the second flow channel 13 when the piston 200 closes the valve port 102.

[0030] The valve core assembly 20 of the embodiment of the present application is provided with a first sealing ring 510 and a second sealing ring 520 at both ends of the valve body 100 along the axial direction of the valve body 100, respectively. The first sealing ring 510 and the second sealing ring 520 are arranged on the same valve body 100, ensuring the coaxiality of the first sealing ring 510 and the second sealing ring 520. When the valve core assembly 20 is installed in the mounting cavity 11 of the mounting seat 10, the sealing between the valve body 100 and the mounting seat 10 can be guaranteed, thereby ensuring the reliability of the operation of the valve core assembly 20.

[0031] As shown in FIG3 , the outer circumference of the valve body 100 is provided with a first annular groove 103 and a second annular groove 104. The first annular groove 103 and the second annular groove 104 are respectively located at the two ends of the flow channel opening 106 along the axial direction of the valve body 100. The first sealing ring 510 is disposed in the first annular groove 103, and the second sealing ring 520 is disposed in the second annular groove 104. By disposing the first sealing ring 510 in the first annular groove 103 and the second sealing ring 520 in the second annular groove 104, the secure connection between the first sealing ring 510 and the second sealing ring 520 and the valve body 100 is improved, thereby preventing the first sealing ring 510 and the second sealing ring 520 from falling off the valve body 100.

[0032] As shown in Figures 2 and 3, the valve core assembly 20 further includes a seal that seals between the valve body 100 and the blocking member 300. Providing the seal between the valve body 100 and the blocking member 300 improves the sealing between the valve body 100 and the blocking member 300, thereby preventing fluid from leaking through the gap between the valve body 100 and the blocking member 300.

[0033] In one embodiment, the blocking member 300 includes a sealing portion 310 and a protruding portion 330. A portion of the sealing portion 310 is inserted into the valve cavity 101 through the mounting opening 105 of the valve body 100. The protruding portion 330 surrounds and connects to the outer circumference of the portion of the sealing portion 310 that extends out of the valve cavity 101, and the protruding portion 330 abuts against the edge portion 130 of the mounting opening 105 of the valve body 100.

[0034] A third sealing ring 530 is provided between the portion of the sealing portion 310 extending into the valve cavity 101 and the wall of the valve cavity 101. The aforementioned sealing member is the third sealing ring 530. The outer periphery of the third sealing ring 530 can contact the wall of the valve cavity 101 to achieve a seal between the sealing portion 310 and the wall of the valve cavity 101.

[0035] A third annular groove 311 is defined on the outer periphery of the portion of the sealing portion 310 extending into the valve chamber 101, and the third sealing ring 530 is disposed within the third annular groove 311. By disposing the third sealing ring 530 within the third annular groove 311, the connection between the third sealing ring 530 and the sealing portion 310 is strengthened, thereby preventing the third sealing ring 530 from falling off the sealing portion 310.

[0036] Of course, in other embodiments, the third sealing ring 530 may also be disposed between the protrusion 330 and the edge portion 130 .

[0037] Continuing to refer to Figures 2 and 3 , a first limiting portion 14 is provided on the wall of the mounting cavity 11; a second limiting portion 120 is provided on the outer circumference of the valve body 100 at one end near the opening 11a of the mounting cavity 11. The second limiting portion 120 cooperates with the first limiting portion 14 at the axial upper limit of the valve body 100. In the embodiment of the present application, the first limiting portion 14 is protruding from the wall of the mounting cavity 11, and the second limiting portion 120 is protruding from the outer circumference of the valve body 100. The second limiting portion 120 abuts against the side surface of the first limiting portion 14 facing the opening 11a, but this is not limiting.

[0038] The valve core assembly 20 of the embodiment of the present application further includes a stopper 600 , which is connected to the mounting seat 10 and abuts against a surface of the sealing member 300 facing away from the valve body 100 .

[0039] The valve core assembly 20 of the embodiment of the present application can be assembled into the mounting cavity 11 of the mounting seat 10 in the following order: First, the valve body 100 is installed into the mounting cavity 11 through the opening 11a. The second limiting portion 120 of the valve body 100 is engaged with the first limiting portion 14 in the mounting cavity 11. The first limiting portion 14 can limit the movement of the valve body 100 in the downward direction. Then, the piston 200 and the elastic member 400 are sequentially installed into the valve cavity 101 of the valve body 100. The blocking member 300 is inserted to block the mounting opening 105, with the protrusion 330 abutting against the edge portion 130. Finally, the stopper 600 is installed and abuts against the side surface of the blocking member 300 facing away from the valve body 100. The stopper 600 can limit the movement of the valve body 100 and the blocking member 300 in the upward direction.

[0040] As can be seen from the above, as shown in Figure 2, when the valve core assembly 20 is subjected to the force of the fluid in a downward direction, the first limiting portion 14 of the mounting seat 10 abuts against the second limiting portion 120 of the valve body 100, and the force of the fluid is concentrated on the valve body 100, while the sealing member 300 is not affected; when the valve core assembly 20 is subjected to the force of the fluid in an upward direction, the force of the fluid is concentrated on the sealing member 300, and the stop member 600 limits the sealing member 300.

[0041] Therefore, in the one-way valve of the embodiment of the present application, a first limiting portion 14 is provided on the wall surface of the mounting cavity 11, and a second limiting portion 120 is provided on the outer peripheral surface of the valve body 100 at one end near the opening 11a of the mounting cavity 11. The second limiting portion 120 cooperates with the first limiting portion 14 in the axial upper limit position of the valve body. The first limiting portion 14 of the mounting cavity 11 directly limits the upper end of the valve body 100, so that when the valve body 100 is subjected to the downward force of the fluid, the valve body 100 will not separate from the blocking member 300.

[0042] In addition, compared with the prior art, the blocking member 300 and the valve body 100 do not need to be fixedly connected, which simplifies the connection structure of the one-way valve; when the valve body 100 is subjected to the downward force of the fluid, the blocking member 300 is almost unaffected, thereby reducing the impact of the fluid force on the blocking member 300.

[0043] It is understood that the stopper 600 may be located in the mounting cavity 11, and the outer periphery of the stopper 600 is engaged with the mounting seat 10. In one embodiment, the stopper 600 may be a retaining spring; in another embodiment, the stopper 600 may also be a compression nut.

[0044] For the mounting seat 10 , along the axial direction of the valve body 100 , the second limiting portion 120 and the second flow channel 13 are respectively located on both sides of the first flow channel 120 .

[0045] In one embodiment, the first limiting portion 14 and the second limiting portion 120 are both annular structures, and the second limiting portion 120 is connected to the outer circumferential surface of the valve body 100. Of course, in other embodiments, the first limiting portion 14 and the second limiting portion 120 each include a plurality of sub-protrusions, and the positions of the multiple sub-protrusions of the first limiting portion 14 correspond to the positions of the multiple sub-protrusions of the second limiting portion 120, and are arranged along the circumference of the valve body 100.

[0046] As shown in Figure 2, the second limiting portion 120 has a first abutting surface 121 on the side facing away from the first limiting portion 14; the edge portion 130 has a second abutting surface 131 on the side facing the protrusion 330; the first abutting surface 121 is flush with the second abutting surface 131, and the protrusion 330 abuts against the first abutting surface 121 and the second abutting surface 131 at the same time.

[0047] In one embodiment, the outer circumference of the protrusion 330 is flush with the outer circumference of the second limiting portion 120. Of course, in other embodiments, the distance from the outer circumference of the protrusion 330 to the axis of the valve body 100 can also be smaller than the distance from the outer circumference of the second limiting portion 120 to the axis of the valve body 100.

[0048] Please refer back to Figure 2. The sealing portion 310 has a guide groove 312 with an opening toward the valve port 102. One axial end of the piston 200 is movably accommodated in the guide groove 312. At least a portion of the elastic member 400 is disposed in the guide groove 312, and one end of the elastic member 400 abuts against the bottom surface of the guide groove 312.

[0049] In the embodiment of the present application, the sealing portion 310 is provided with a guide groove 312, which is used to guide the piston 200 to move axially along the valve body 100. At the same time, the guide groove 312 can also be used to accommodate the elastic member 400 and part of the piston 200, making the structure of the one-way valve more compact and facilitating product miniaturization.

[0050] An accommodating groove 221 is defined on one side of the piston 200 facing the bottom of the guide groove 312 . Part of the elastic member 400 is accommodated in the accommodating groove 221 , and the other end of the elastic member 400 abuts against the bottom of the accommodating groove 221 .

[0051] In the embodiment of the present application, the piston 200 is provided with a receiving groove 221 for accommodating the elastic member 400. On the one hand, the elastic member 400 abuts against the bottom surface of the receiving groove 221 to prevent the elastic member 400 from being separated from the piston 200 and causing the elastic member 400 to lose its function; on the other hand, the structure of the one-way valve is further made more compact, which is conducive to achieving product miniaturization; on the other hand, the elastic member 400 fits against the groove wall surface of the receiving groove 221, and the axial movement of the piston 200 fully guarantees the axial movement of the elastic member 400, thereby preventing the elastic member 400 from being deformed during the movement of the piston 200.

[0052] As shown in Figure 4, the piston 200 includes a plug rod 220, a plug head 210, and a plurality of guide protrusions 230. The plug head 210 is connected to one axial end of the plug rod 220 and is used to seal the valve port 102. A fourth sealing ring 540 is provided around the outer periphery of the plug head 210. A receiving groove 221 is provided on the side of the plug rod 220 facing away from the plug head 210. The opening of the receiving groove 221 faces the bottom surface of the guide groove 312. The other end of the elastic member 400 abuts the plug rod 220.

[0053] Multiple guide protrusions 230 are protruded from the outer peripheral surface of the plug rod 220, and multiple guide protrusions 230 are arranged along the circumference of the plug rod 220. There is a flow channel groove 240 connected to the valve cavity 101 between two adjacent guide protrusions 230, and each guide protrusion 230 is guided and matched with the groove side of the guide groove 312.

[0054] In the embodiment of the present application, on the one hand, the plurality of guide protrusions 230 cooperate with the groove side surfaces of the guide groove 312 to guide and cooperate, ensuring that the piston 200 can move back and forth along the axial direction of the valve body 100; on the other hand, since there is a flow channel groove 240 between two adjacent guide protrusions 230, the sum of the surface areas of the plurality of guide protrusions 230 in contact with the guide groove 312 is much smaller than the outer circumferential area of ​​the entire cylinder, thereby reducing the contact area between the piston 200 and the groove side surfaces of the guide groove 312, thereby reducing the degree of wear between the piston 200 and the sealing member 300; in addition, wear impurities generated between the piston 200 and the sealing member 300 can be discharged along the flow channel groove 240 to prevent the piston 200 from getting stuck; on the other hand, since the flow channel groove 240 is connected to the valve chamber 101, when the piston 200 moves back and forth, the fluid can flow along the flow channel groove 240, thereby balancing the pressure between the inside and outside of the guide groove 312, and reducing the resistance of the piston 200 during movement.

[0055] In one embodiment, the surface of the guide protrusion 230 that guides and cooperates with the side surface of the guide groove 312 is an arc surface, and the side surface of the guide groove 312 is adapted to the shape of the arc surface. The bottom surface of the flow channel groove 240 is an arc surface.

[0056] In one embodiment, as shown in FIG5 , the edge portion 130 of the mounting opening 105 of the valve body 100 has a first connection structure 110 ; the protruding portion 330 of the blocking member 300 has a second connection structure 320 , and the second connection structure 320 is movably connected to the first connection structure 110 within a predetermined range.

[0057] The valve core assembly of the embodiment of the present application adopts a movably connected manner of the first connecting structure 110 and the second connecting structure 320 to realize the connection between the valve body 100 and the sealing member 300. Compared with the prior art, the valve body 100 and the sealing member 300 of the embodiment of the present application are easier to disassemble and assemble, which facilitates the transportation of the valve body 100 and the sealing member 300, and ensures that the valve body 100 and the sealing member 300 are connected as an integral part during transportation and are not easily lost.

[0058] In an embodiment of the present application, the valve body 100 has at least two first connection structures 110 arranged along the circumference of the valve body 100, and the sealing member 300 has at least two second connection structures 320 arranged along the circumference of the protrusion 330, and the at least two first connection structures 110 are respectively movably connected to the at least two second connection structures 320 within a predetermined range.

[0059] Of course, in other embodiments, the positions of the first connection structure 110 and the second connection structure 320 can be interchanged, that is, the blocking member 300 has the first connection structure 110 and the valve body 100 has the second connection structure 320 .

[0060] The valve core assembly 20 of the embodiment of the present application adopts a movable connection method between the first connecting structure 110 and the second connecting structure 320 to realize the connection between the valve body 100 and the sealing member 300. The valve body 100 and the sealing member 300 are easy to disassemble and assemble, which facilitates the transportation of the valve body 100 and the sealing member 300, and ensures that the valve body 100 and the sealing member 300 are connected as an integral part during transportation and are not easily lost; on the other hand, a certain processing error is allowed when the first connecting structure 110 and the second connecting structure 320 are matched. After the valve body 100 and the sealing member 300 are connected, they can still move relative to each other within a predetermined range, as long as the valve body 100 and the sealing member 300 are not disengaged.

[0061] In one embodiment, the first connecting structure 110 and the second connecting structure 320 are movably connected within a first predetermined range along the circumference of the valve body 100; and / or, the first connecting structure 110 and the second connecting structure 320 are movably connected within a second predetermined range along the axial direction of the valve body 100.

[0062] In one embodiment, the first connecting structure 110 is protruding from a side surface of the edge portion 130 facing the protrusion 330, and the second connecting structure 320 is formed on the outer peripheral surface of the protrusion 330. By providing the first connecting structure 110 on the side surface of the edge portion 130 facing the protrusion 330 and the second connecting structure 320 on the outer peripheral surface of the protrusion 330, both the first connecting structure 110 and the second connecting structure 320 are exposed, which not only facilitates processing but also makes it easier for assemblers to operate the first connecting structure 110 and the second connecting structure 320, thereby quickly achieving assembly and disassembly between the valve body 100 and the blocking member 300.

[0063] It should be noted that the first connection structure 110 can be protruded from the second abutting surface 131 of the edge portion 130. In addition, when the second limiting portion 120 is provided on the outer periphery of the valve body 100, the first connection structure 110 can be protruded from the plane where the second abutting surface 131 of the edge portion 130 and the first abutting surface 121 of the second limiting portion 120 are located.

[0064] It is understood that the first connection structure 110 and the second connection structure 320 can be snap-fitted, but the present invention is not limited thereto, and any other structure that can be movably connected within a predetermined range is also acceptable.

[0065] As shown in Figure 5, the first connecting structure 110 includes an extension portion 110a and a snap-fit ​​portion 113. The extension portion 110a is protruding from the side surface of the edge portion 130 facing the protrusion 330, and the snap-fit ​​portion 113 is connected to the end of the extension portion 110a. The second connecting structure 320 includes a notch 322, which can be formed by the outer circumferential surface of the protrusion 330 being recessed inward along the radial direction of the blocking member 300. A locking block 340 is disposed within the notch 322, which divides the notch 322 into a first groove 321 and a second groove 322b along the circumference of the blocking member 300. The extension portion 110a extends into the first groove 321, and the snap-fit ​​portion 113 extends into the second groove 322b and snaps into the locking block 340.

[0066] Furthermore, the second connection structure 320 also includes a third groove 322a, through which the first groove 321 communicates with the second groove 322b. The extension portion 110a includes a fixing portion 111 and a cantilever 112. The fixing portion 111 protrudes from a side surface of the edge portion 130 facing the protruding portion 330. One end of the cantilever 112 is connected to the fixing portion 111 and extends from the fixing portion 111 along the circumference of the valve body 100. The buckle portion 113 is connected to the other end of the cantilever 112.

[0067] Among them, the circumferential dimension of the first connecting structure 110 along the valve body 100 is smaller than the circumferential dimension of the first groove 321 along the protrusion 330, so that when the valve body 100 abuts against the protrusion 330, the first connecting structure 110 can extend into the first groove 321, and when at least one of the valve body 100 and the sealing member 300 is subjected to external force, the valve body 100 and the sealing member 300 produce relative rotation, and the blocking block 340 abuts against the buckling portion 113, so that the cantilever 112 is deformed and tilted, and then the buckling portion 113 passes through the third groove 322a until it extends into the second groove 322b and is buckled to the blocking block 340.

[0068] It is understood that the at least two cantilevers 112 of the at least two second connection structures 320 extend in the same direction along the circumference of the valve body 100. Thus, when the blocking member 300 and the valve body 100 are subjected to an external force and rotate relative to each other, the at least two fastening portions 113 of the at least two second connection structures 320 can be simultaneously fastened to the at least two second grooves 322b.

[0069] In the embodiment of the present application, the number of the first connection structure 110 and the second connection structure 320 are both two, and the two first connection structures 110 are centrally symmetrically arranged about the center of the installation opening 105 , and the two second connection structures 320 are centrally symmetrically arranged about the center of the protrusion 330 .

[0070] Of course, the number of the first connection structures 110 and the second connection structures 320 may be greater than two, and they are not listed here one by one.

[0071] In one embodiment, the second groove 322b extends through the protrusion 330 along the axial direction of the valve body 100. The protrusion 330 has a first surface 331 facing the edge portion 130 and a second surface 332 opposite to the first surface 331. The third groove 322a is formed by the second surface 332 being recessed toward the first surface 331.

[0072] In one embodiment, the valve body 100 and the blocking member 300 are made of plastic material. Thus, the first connecting structure 110 and the second connecting structure 320 can be formed together when the valve body 100 and the blocking member 300 are integrally injection molded.

[0073] It can be understood that when the first connecting structure 110 and the second connecting structure 320 are movably connected within a first predetermined range along the circumference of the valve body 100, there may be a gap between the blocking block 340 and the snap-on portion 113; and / or, there may be a gap between the blocking block 340 and the fixing portion 111.

[0074] When the first connection structure 110 and the second connection structure 320 are movably connected within a second predetermined range along the axial direction of the valve body 100 , a gap may exist between the blocking block 340 and the cantilever 112 .

[0075] The following describes in detail the clamping process between the valve body 100 and the blocking member 300 in conjunction with FIG6 and FIG7:

[0076] As shown in Figure 6, the first connecting structure 110 of the valve body 100 is aligned with the first groove 321 of the sealing member 300, and the sealing member 300 is inserted into the valve cavity 101 of the valve body 100. When the valve body 100 abuts against the protrusion 330, the first connecting structure 110 extends into the first groove 321. At this time, the buckling portion 113 is not buckled in the second groove 322b.

[0077] As shown in Figure 7, an external force is applied to cause the valve body 100 and the sealing member 300 to rotate relative to each other. During the rotation, the locking block 340 abuts against the fastening portion 113, causing the cantilever 112 to deform and tilt upward, thereby allowing the fastening portion 113 to pass through the third groove 322a and extend into the second groove 322b. When the fastening portion 113 passes through the third groove 322a and extends into the second groove 322b, the cantilever 112 returns to its original position, causing the fastening portion 113 to fasten to the locking block 340.

[0078] It should be noted that when assembling the one-way valve of the embodiment of the present application, the valve body 100 can be first installed into the mounting seat 10 in the order described above, and then the piston 200 and the elastic part 400 can be installed into the valve cavity 101 of the valve body 100 in turn, and the sealing part 300 can be used to seal the mounting port 105.

[0079] In other embodiments, the installation sequence of the one-way valve can also be: first connect the valve body 100 and the sealing member 300 through the first connecting structure 110 and the second connecting structure 320. In the process of connecting the valve body 100 and the sealing member 300, the piston 200 and the elastic member 400 are also installed in the valve cavity 101 of the valve body 100. Thereafter, the assembled valve body 100, piston 200, elastic member 400 and sealing member 300 are installed in the mounting seat 10 together.

[0080] It is understandable that the various embodiments / implementations provided in this application can be combined with each other without causing any contradiction, and they will not be illustrated one by one here.

[0081] In the application examples, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. Terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the application examples can be understood according to the specific circumstances.

[0082] In the description of the application embodiments, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the application embodiments and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the application embodiments.

[0083] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the claimed invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0084] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A one-way valve, wherein: include: The mounting seat comprises a mounting cavity with an opening, wherein a wall surface of the mounting cavity is provided with a first limiting portion; The valve core assembly includes a valve body, a piston, and a sealing member. The valve body is arranged in the installation cavity and includes a valve cavity with an installation port, and the wall of the valve cavity is provided with a valve port; the outer peripheral surface of the valve body close to the opening is provided with a second limiting portion, and the second limiting portion cooperates with the first limiting portion in the axial upper limit of the valve body; the piston is movably arranged in the valve cavity for closing the valve port; the sealing member blocks the installation port.

2. The one-way valve according to claim 1, wherein The blocking member comprises: A sealing portion, sealing the installation opening; The protruding portion is connected to the outer peripheral surface of the sealing portion and abuts against the edge of the installation opening of the valve body.

3. The one-way valve according to claim 2, wherein: The second limiting portion has a first abutting surface on a side facing away from the first limiting portion; The edge portion has a second abutting surface on a side facing the protruding portion; The first abutting surface is flush with the second abutting surface, and the protruding portion abuts against the first abutting surface and the second abutting surface at the same time.

4. The one-way valve according to claim 2, wherein: Part of the sealing portion extends into the valve cavity; the sealing portion has a guide groove with an opening toward the valve port, and one axial end of the piston is movably accommodated in the guide groove and is guided and matched with the groove side surface of the guide groove.

5. The one-way valve according to claim 4, wherein: The valve core assembly also includes: An elastic member, at least part of which is arranged in the guide groove, and one end of the elastic member abuts against the bottom surface of the guide groove, and the other end abuts against the piston; the elastic member is used to apply an elastic force to the piston to move in the direction of closing the valve port.

6. The one-way valve according to claim 5, wherein: The piston comprises: a plug rod, the other end of the elastic member abutting against the plug rod; a plug connected to one axial end of the plug rod and used to close the valve port; and A plurality of guide protrusions are protruding from the outer circumferential surface of the plug rod, and the plurality of guide protrusions are arranged along the circumference of the plug rod. A flow channel groove communicating with the valve cavity is provided between two adjacent guide protrusions, and each guide protrusion is guided and matched with the groove side surface of the guide groove.

7. The one-way valve according to claim 6, wherein: A receiving groove is provided on a side of the plug rod facing away from the plug head, and an opening of the receiving groove faces the bottom surface of the guide groove; A portion of the elastic member is accommodated in the accommodating groove, and the other end of the elastic member abuts against the bottom surface of the accommodating groove.

8. The one-way valve according to claim 6, wherein: The surface of the guide protrusion that cooperates with the side surface of the guide groove in a guiding manner is an arc surface, and the side surface of the guide groove is adapted to the shape of the arc surface.

9. The one-way valve according to claim 1, wherein: The first limiting portion and the second limiting portion are both annular structures, and the second limiting portion is connected to the outer peripheral surface of the valve body in a surrounding manner.

10. The one-way valve according to claim 1, wherein The valve core assembly also includes: The stopper is connected to the mounting seat and abuts against a surface of the sealing member on one side facing away from the valve body.

11. The one-way valve according to claim 1, wherein The valve core assembly also includes: A sealing member is sealed between the valve body and the blocking member.

12. The one-way valve according to claim 11, wherein: Part of the blocking member extends into the valve cavity through the installation opening; The sealing member is sealed between the cavity wall of the valve cavity and the portion of the blocking member extending into the valve cavity.

13. The one-way valve according to claim 12, wherein: A third annular groove is provided on the outer periphery of the portion of the blocking member extending into the valve cavity; The sealing member is a third sealing ring, and the third sealing ring is arranged in the third annular groove.

14. The one-way valve according to claim 13, wherein: The circumferential side wall of the valve body also has a flow channel opening connected to the valve cavity; the wall surface of the valve cavity has a valve opening; the flow channel opening is located between the third sealing ring and the valve opening.

15. The one-way valve according to claim 1, wherein The edge portion of the mounting opening of the valve body has a first connection structure; The blocking member has a second connection structure, and the second connection structure is movably connected to the first connection structure within a predetermined range.

16. The one-way valve according to claim 15, wherein The first connection structure and the second connection structure are movably connected within a first predetermined range along the circumference of the valve body; and / or, The first connection structure and the second connection structure are movably connected within a second predetermined range along the axial direction of the valve body.

17. The one-way valve according to claim 15, wherein: The blocking member includes a sealing portion and a protruding portion, wherein the sealing portion blocks the installation opening, the protruding portion is connected to the outer peripheral surface of the sealing portion, and the protruding portion abuts against the edge portion of the installation opening of the valve body; The second connection structure is formed on the protruding portion, and the first connection structure is protruded from a side surface of the edge portion of the valve body facing the protruding portion.

18. The one-way valve according to claim 15, wherein The first connection structure includes an extension portion and a buckle portion, the extension portion is connected to the valve body, and the buckle portion is connected to the end of the extension portion; The second connecting structure includes a notch, a clamping block is provided in the notch, and the clamping block divides the notch into a first groove and a second groove along the circumference of the blocking member; The extending portion extends into the first slot, and the buckling portion extends into the second slot and is buckled with the clamping block.

19. The one-way valve according to claim 1, wherein The circumferential side wall of the valve body also has a flow channel opening communicating with the valve cavity; The outer periphery of the valve body is sleeved with a first sealing ring and a second sealing ring, the first sealing ring and the second sealing ring are spaced apart along the axial direction of the valve body, and the flow channel opening is located between the first sealing ring and the second sealing ring.

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