A one-way valve

Abstract

The utility model discloses a check valve, including valve body, sealing assembly, the valve body includes piston, spring, first connecting piece, second connecting piece, first connecting piece is connected with second connecting piece, piston, spring set up in the inner chamber of first connecting piece, the inner chamber of first connecting piece is equipped with the boss along the axial direction of valve body, the recess of piston is equipped with the diameter less than piston diameter one end close to spring, the recess is in with piston abuts in one end of spring, the other end of spring and boss abut, sealing assembly sets up in the end portion of first connecting piece and second connecting piece each other far apart. The utility model construction is simple, is applicable to the pipe connection of no fixed length, and the pipeline is carried out ring cutting punching or processing or recess shape, can connect the pipeline, and the convenient any length connection adapts to different pipe material, thickness and length's pipeline, and the assembly is simple and quick, and the joint sealing aging can be convenient replacement and reconnection pipeline.

Description

Technical Field

[0001] This utility model relates to the field of piston technology, and in particular to a one-way valve. Background Technology

[0002] Existing check valves generally include a valve body, a piston, and a spring. The piston and spring are located inside the valve body and are connected. The preload force provided by the spring to the piston allows the piston to move within the valve body. The movement of the piston enables the valve body to be in a state of connection with the outside world or closed.

[0003] Existing check valves have compatibility issues with pipes of different specifications, and after the joints age, the reconnected pipes need to be hydraulically formed before installation, making the installation process cumbersome and the construction difficult. Utility Model Content

[0004] To address the shortcomings of the existing technology, this invention proposes a one-way valve that ensures good contact between the spring and piston, prevents contact displacement under long-term fluid impact, provides good sealing, and is easy to install.

[0005] The technical solution of this utility model is as follows: A one-way valve includes a valve body and a sealing assembly. The valve body includes a piston, a spring, a first connecting member, and a second connecting member. The first connecting member and the second connecting member are connected. The piston and the spring are disposed in the inner cavity of the first connecting member. The inner cavity of the first connecting member has a protrusion along the axial direction of the valve body. The piston has a recess with a diameter smaller than the piston diameter at one end near the spring. One end of the spring is placed in the recess and abuts against the piston, and the other end of the spring abuts against the protrusion. The sealing assembly is disposed at the ends of the first connecting member and the second connecting member that are far apart from each other.

[0006] By providing a recess at the end of the piston connected to the spring, the spring is placed within the recess and abuts against the piston. When the piston is impacted by fluid, the concave portion of the piston encloses the spring, preventing contact displacement between the spring and the piston during compression. Even with reciprocating movement of the piston, there will be no contact displacement between them. The first and second seals connected to the valve body also employ multiple sealing methods to improve the sealing performance of the one-way valve, ensuring that the valve body does not leak during operation.

[0007] In one embodiment, a snap-fit ​​ring is provided between the first connector and the second connector.

[0008] In one embodiment, a first sealing ring is provided between the first connector, the second connector, and the snap ring.

[0009] In one embodiment, the end of the piston away from the spring abuts against the snap ring.

[0010] In one embodiment, the end of the first connector away from the second connector is provided with a first snap-fit ​​sleeve, and the end of the second connector away from the first connector is provided with a second snap-fit ​​sleeve.

[0011] In one embodiment, the inner annular surface of the first connector in contact with the pipe is provided with a first snap-fit ​​groove, and the first snap-fit ​​sleeve is installed in the first snap-fit ​​groove. The inner annular surface of the second connector in contact with the pipe is provided with a second snap-fit ​​groove, and the second snap-fit ​​sleeve is installed in the second snap-fit ​​groove.

[0012] In one embodiment, the sealing assembly includes a first seal and a second seal, wherein the ends of the first connector and the second connector that are far apart from each other are connected to one end of the first seal, and the other end of the first seal is connected to the second seal.

[0013] In one embodiment, a second sealing ring is provided between the first connector, the second connector, and the first seal.

[0014] In one embodiment, the second seal has a connecting cavity, and the end of the first seal is placed in the connecting cavity and threadedly connected to the second seal.

[0015] In one embodiment, a third sealing ring is provided between the first seal and the second seal.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention is simple to construct and applicable to pipe connections without a fixed length, facilitating connections of any length and adapting to pipes of different materials, thicknesses, and lengths. Pipes can be connected simply by circumferential cutting, reducing on-site construction difficulty. Assembly is simple and quick, and after the joint seal ages, it can be easily replaced and reconnected, resulting in low replacement costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the first connecting member in an embodiment of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the second connector in an embodiment of the present utility model;

[0021] Figure 4 for Figure 1 Exploded view of the structure of the connecting parts and seals on the right side of the valve.

[0022] In the figure: 1. Valve body, 2. First connector, 3. Second connector, 4. First seal, 5. Second seal, 6. Connecting pipe, 7. Piston, 8. Spring, 9. Inner cavity, 10. Protrusion, 11. Recess, 12. Snap ring, 13. First sealing ring, 14. Second sealing ring, 15. Third sealing ring, 16. First snap sleeve, 17. Second snap sleeve, 18. First snap groove, 19. Second snap groove, 20. Snap part, 21. Connecting cavity. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] like Figures 1 to 4 As shown, this embodiment discloses a one-way valve, including a valve body 1, a first sealing element 4, and a second sealing element 5. The valve body 1, the first sealing element 4, and the second sealing element 5 are sleeved on a connecting pipe 6. The first sealing element 4 and the second sealing element 5 are threadedly connected. The valve body 1 includes a piston 7, a spring 8, a first connecting element 2, and a second connecting element 3. One end of the first connecting element 2 is threadedly connected to the second connecting element 3, and the other end of the first connecting element 2 is threadedly connected to the first sealing element 4. The end of the second connecting element 3 away from the first connecting element 2 is connected to the first sealing element 4. Next, the piston 7 and spring 8 are disposed in the inner cavity 9 of the first connecting member 2. The inner cavity 9 of the first connecting member 2 is provided with a protrusion 10 along the axial direction of the valve body 1. The piston 7 is provided with a recess 11 with a diameter smaller than the diameter of the piston 7 at one end near the spring 8. One end of the spring 8 is placed in the recess 11 and abuts against the piston 7. When the piston 7 is impacted by fluid, due to the covering effect of the recess 11 of the piston 7 on the spring 8, the spring 8 will not be contacted or shifted with the piston 7 during the compression process. The other end of the spring 8 abuts against the protrusion 10.

[0026] Before installation, the connecting pipe 6 must be circumferentially cut or ground to keep the pipe end face flat after cutting or processing. Then, according to the sleeve depth (length) designed for the one-way valve, two through holes are drilled on the connecting pipe 6 or a suitable concave shape is processed on the outer wall of the pipe (usually circular and for thick pipes that do not require through holes) to facilitate the installation of the protruding snap sleeve, clamp sleeve or sealing ring.

[0027] In this embodiment, the piston 7 is made of ceramic.

[0028] In this embodiment, a retaining ring 12 is provided between the first connecting member 2 and the second connecting member 3, and the end of the piston 7 away from the spring 8 abuts against the retaining ring 12. The inner diameter of the retaining ring 12 is the same as the inner diameter of the connecting pipe 6 to ensure maximum fluid flow. When the piston 7 is impacted by fluid flowing in from the direction of the retaining ring 12, the piston 7 will compress the spring 8, and the one-way valve will be in the open state. When the piston 7 is impacted by fluid from the side of the spring 8, the piston 7 will abut against the retaining ring 12, preventing fluid flow, and the one-way valve will be in the closed state.

[0029] In this embodiment, a first sealing ring 13 is provided between the first connector 2, the second connector 3, and the snap ring 12. The first sealing ring 13 provides an initial seal for the one-way valve, preventing fluid from flowing out from the connection gap between the connector and the snap ring 12, thereby improving the sealing performance of the one-way valve.

[0030] In this embodiment, the end of the first connector 2 away from the second connector 3 is provided with a first snap-fit ​​sleeve 16, and the end of the second connector 3 away from the first connector 2 is provided with a second snap-fit ​​sleeve 16.

[0031] In this embodiment, the inner annular surface of the first connector 2 in contact with the connecting pipe 6 is provided with a first snap-fit ​​groove 18, and the inner annular surface of the second connector 3 in contact with the connecting pipe 16 is provided with a second snap-fit ​​groove 19. The connecting pipe 6 is provided with an inwardly recessed annular snap-fit ​​portion 20. The first snap-fit ​​groove 18 and the second snap-fit ​​groove 19 correspond to the snap-fit ​​portion 20, respectively. The first snap-fit ​​sleeve 16 is installed in the space formed by the first snap-fit ​​groove 18 and the snap-fit ​​portion 20, and the second snap-fit ​​sleeve 17 is installed in the space formed by the second snap-fit ​​groove 19 and the snap-fit ​​portion 20. The first snap-fit ​​sleeve 16 and the second snap-fit ​​sleeve 17 provide a second seal for the check valve, preventing fluid from flowing out from the connection gap between the valve body and the connecting pipe 16, thus improving the sealing performance of the check valve.

[0032] In this embodiment, the ends of the first connector 2 and the second connector 3 that are far apart from each other are connected to one end of the first seal 4, and the other end of the first seal 4 is connected to the second seal 5. A second sealing ring 14 is provided between the first connector 2, the second connector 3 and the first seal 4. The second sealing ring 14 is disposed at the ends of the first connector 2 and the second connector 3. When the first seal 4 is threadedly connected to the first connector 2 and the second connector 3 respectively, the second sealing ring 14 provides a third seal for the one-way valve, preventing fluid from flowing out from the connection gap between the valve body 1 and the first seal 4, thereby improving the sealing performance of the one-way valve.

[0033] In this embodiment, the second sealing member 5 is provided with a connecting cavity 21, and the end of the first sealing member 4 is placed in the connecting cavity 21 and threadedly connected to the second sealing member 5. A third sealing ring 15 is provided between the first sealing member 4 and the second sealing member 5. The third sealing ring 15 provides a fourth seal for the one-way valve, preventing fluid from flowing out from the connection gap between the first sealing member 4 and the second sealing member 5, thereby improving the sealing performance of the one-way valve.

[0034] This invention improves the sealing performance of the one-way valve by setting multiple sealing methods in one direction, ensuring that the valve body will not leak during operation.

[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A one-way valve, characterized in that: The valve body (1) includes a valve body (1) and a sealing assembly. The valve body (1) includes a piston (7), a spring (8), a first connector (2), and a second connector (3). The first connector (2) is connected to the second connector (3). The piston (7) and the spring (8) are disposed in the inner cavity of the first connector (2). The inner cavity (9) of the first connector (2) is provided with a protrusion (10) along the axial direction of the valve body (1). The piston (7) is provided with a recess (11) with a diameter smaller than that of the piston (7) at one end near the spring (8). One end of the spring (8) is placed in the recess (11) and abuts against the piston (7). The other end of the spring (8) abuts against the protrusion (10). The sealing assembly is disposed at the ends of the first connector (2) and the second connector (3) that are far apart from each other.

2. The one-way valve according to claim 1, characterized in that: A snap ring (12) is provided between the first connector (2) and the second connector (3).

3. The one-way valve according to claim 2, characterized in that: A first sealing ring (13) is provided between the first connector (2), the second connector (3) and the snap ring (12).

4. The one-way valve according to claim 2, characterized in that: The piston (7) at the end away from the spring (8) abuts against the snap ring (12).

5. The one-way valve according to claim 1, characterized in that: The first connector (2) is provided with a first snap-fit ​​sleeve (16) at the end away from the second connector (3), and the second connector (3) is provided with a second snap-fit ​​sleeve (17) at the end away from the first connector (2).

6. The one-way valve according to claim 5, characterized in that: The first connector (2) has a first snap-fit ​​groove (18) on its inner ring surface that contacts the pipe, and the first snap-fit ​​sleeve (16) is installed in the first snap-fit ​​groove (18). The second connector (3) has a second snap-fit ​​groove (19) on its inner ring surface that contacts the pipe, and the second snap-fit ​​sleeve (17) is installed in the second snap-fit ​​groove (19).

7. The one-way valve according to claim 1, characterized in that: The sealing assembly includes a first seal (4) and a second seal (5). The ends of the first connector (2) and the second connector (3) that are far apart from each other are connected to one end of the first seal (4), and the other end of the first seal (4) is connected to the second seal (5).

8. The one-way valve according to claim 7, characterized in that: A second sealing ring (14) is provided between the first connector (2), the second connector (3) and the first sealing member (4).

9. The one-way valve according to claim 7, characterized in that: The second seal (5) is provided with a connecting cavity (21), and the end of the first seal (4) is placed in the connecting cavity (21) and threadedly connected to the second seal (5).

10. The one-way valve according to claim 9, characterized in that: A third sealing ring (15) is provided between the first sealing element (4) and the second sealing element (5).

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