One-way valve

Abstract

The utility model provides a one-way valve which comprises a valve body, a plugging piece and a limiting piece, and the valve body is provided with a circulation opening. The plugging piece is movably arranged in the valve body so as to open and close the circulation opening; the limiting piece is arranged on the side, away from the circulation opening, of the plugging piece, an outer ring of the limiting piece is connected with the valve body, an inner ring of the limiting piece is provided with a first conical surface and a second conical surface, the first conical surface and the second conical surface are arranged at intervals in the axial direction of the valve body, and the limiting piece is used for stopping and limiting the plugging piece; the stop limiting position is located between the first conical surface and the second conical surface, and the first conical surface and the second conical surface are used for guiding a medium. By the adoption of the scheme, when the plugging piece plugs the circulation opening, the valve body stops the plugging piece, and when the plugging piece opens the circulation opening, the limiting piece stops and limits the plugging piece, and the plugging piece is prevented from being disengaged from the interior of the valve body. And the first conical surface and the second conical surface guide the medium so as to reduce the flow resistance at the position of the limiting piece.

Description

Technical Field

[0001] The utility model relates to the technical field of one-way valves, in particular to a one-way valve. Background Art

[0002] Some one-way valves use a blocking member to block or open the valve. Pressure fluctuations on both sides of the blocking member cause it to block or open the valve's flow opening, automatically maintaining one-way flow within the valve. To prevent the blocking member from dislodging from the guide tube during reciprocating movement, a stopper is often used to axially limit the blocking member. The installation of a stopper reduces the cross-sectional area through which the medium can flow, increasing the flow resistance at the location of the stopper, and thus hindering the flow of the medium.

[0003] Therefore, a one-way valve is needed that can solve the problem of large flow resistance at the position of the limiter. Utility Model Content

[0004] The utility model provides a one-way valve to solve the problem of large medium flow resistance at a limit piece of the one-way valve in the prior art.

[0005] In order to solve the above problems, the utility model provides a one-way valve, including a valve body, a sealing member and a limit member, the valve body has a flow port; the sealing member is movably arranged in the valve body to open and close the flow port; the limit member is arranged on the side of the sealing member away from the flow port, wherein the outer ring of the limit member is connected to the valve body, and the inner ring of the limit member has a first conical surface and a second conical surface, and the first conical surface and the second conical surface are arranged at intervals along the axial direction of the valve body, and the limit member is used to stop and limit the sealing member, and the stop limit position is located between the first conical surface and the second conical surface, and the first conical surface and the second conical surface are used to guide the medium.

[0006] Furthermore, the first conical surface and the second conical surface are located on the same conical surface.

[0007] Furthermore, the inner diameter of one end of the first conical surface close to the flow port is smaller than the inner diameter of the other end of the first conical surface; the inner diameter of one end of the second conical surface close to the flow port is smaller than the inner diameter of the other end of the second conical surface.

[0008] Furthermore, the valve body includes a first section and a second section connected to each other, the inner diameter of the second section is smaller than the inner diameter of the first section, a first limit surface is formed between the first section and the second section, the limit member is located in the first section and abuts against the first limit surface, the second conical surface is connected to the second section at one end close to the flow port, and the inner diameter of the second conical surface at one end close to the flow port is equal to the inner diameter of the second section.

[0009] Furthermore, the limiting member includes a first limiting portion and a second limiting portion connected to each other, the inner diameter of the first limiting portion is smaller than the inner diameter of the second limiting portion, the second limiting portion is arranged on a side of the first limiting portion close to the flow port, and the end face of the first limiting portion close to one end of the flow port cooperates with the stopper at one end of the sealing member close to the limiting member.

[0010] Furthermore, the first conical surface is provided on the inner ring of the first limiting portion, and the second conical surface is provided on the inner ring of the second limiting portion.

[0011] Furthermore, when the first limiting portion cooperates with the blocking member stopper, the first limiting portion and the blocking member are in surface contact, and the end faces of the first limiting portion and the blocking member stopper that cooperate are perpendicular to the movement direction of the blocking member.

[0012] Furthermore, the blocking member has a fitting section at one end close to the limiting member, the maximum spacing of the outer side walls of the fitting section is E, the inner diameter of the second limiting portion is F, F is greater than E, and the difference between F and E ranges from 0.3mm to 1.5mm.

[0013] Furthermore, the blocking piece includes a blocking piece body and a guide structure. The guide structure is arranged on the periphery of the blocking piece body. The blocking piece body blocks or opens the flow port. The guide structure is in sliding cooperation with the valve body.

[0014] Furthermore, the guide structure includes multiple fin structures, which are arranged along the circumference of the sealing member body. One side of the fin structure is connected to the sealing member body, and the other side of the fin structure is slidably matched with the valve body. The sealing member has a matching section at one end close to the limit member, and the matching section is arranged on the fin structure.

[0015] The technical solution of the present invention is applied to provide a one-way valve, including a valve body, a blocking member and a limiter, wherein the valve body has a flow port; the blocking member is movably arranged in the valve body to open and close the flow port; the limiter is arranged on the side of the blocking member away from the flow port, wherein the outer ring of the limiter is connected to the valve body, the inner ring of the limiter has a first conical surface and a second conical surface, the first conical surface and the second conical surface are arranged at intervals along the axial direction of the valve body, the limiter is used to stop and limit the blocking member, the stop limit position is located between the first conical surface and the second conical surface, the first conical surface and the second conical surface are used to guide the medium. With this solution, the blocking member moves back and forth in the valve body to open and close the flow port, when the blocking member blocks the flow port, the valve body stops the blocking member, when the blocking member opens the flow port, the blocking member moves away from the flow port, the limiter stops and limits the blocking member to prevent the blocking member from falling out of the valve body. The inner ring of the stopper has a first conical surface and a second conical surface, which guide the medium so that it can flow along the first and second conical surfaces, reducing the flow resistance at the stopper. A one-way valve typically has a large flow resistance at the stopper 40. However, by providing conical surfaces on both sides of the stopper, the present invention effectively guides the medium before and after the stopper, effectively reducing the overall flow resistance of the one-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic structural diagram of a one-way valve provided in an embodiment of the present utility model is shown;

[0018] Figure 2 Shown Figure 1 A schematic diagram of the structure when the one-way valve flow port is open;

[0019] Figure 3 Shown Figure 1 Schematic diagram of the structure of the limiter of the one-way valve.

[0020] The above drawings include the following reference numerals:

[0021] 10. Guide tube; 11. First section; 12. Second section;

[0022] 20. Base;

[0023] 21. Circulation port;

[0024] 30. Sealing parts;

[0025] 31. Coordination section;

[0026] 33. Blocking piece body;

[0027] 34. Guiding structure;

[0028] 341, fin structure;

[0029] 40. Limiting parts;

[0030] 41. First conical surface;

[0031] 42. Second conical surface;

[0032] 43. First limiting portion;

[0033] 44. Second limiting portion. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way serves as any limitation on the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

[0035] like Figures 1 to 3 As shown, an embodiment of the present invention provides a one-way valve, including a valve body, a sealing member 30 and a limit member 40, the valve body having a flow port 21; the sealing member 30 is movably arranged in the valve body to open and close the flow port 21; the limit member 40 is arranged on the side of the sealing member 30 away from the flow port 21, wherein the outer ring of the limit member 40 is connected to the valve body, and the inner ring of the limit member 40 has a first conical surface 41 and a second conical surface 42, and the first conical surface 41 and the second conical surface 42 are arranged at intervals along the axial direction of the valve body, and the limit member 40 is used to stop and limit the sealing member 30, and the stop limit position is located between the first conical surface 41 and the second conical surface 42, and the first conical surface 41 and the second conical surface 42 are used to guide the medium.

[0036] With this solution, the blocking member 30 moves back and forth in the valve body to open and close the flow port 21. When the blocking member 30 blocks the flow port 21, the valve body stops the blocking member 30. When the blocking member 30 opens the flow port 21, the blocking member 30 moves away from the flow port 21, and the limit member 40 stops and limits the blocking member 30 to prevent the blocking member 30 from falling out of the valve body.

[0037] The inner ring of the stopper 40 has a first tapered surface 41 and a second tapered surface 42, which guide the medium so that it can flow along the first tapered surface 41 and the second tapered surface 42, thereby reducing the flow resistance at the stopper. A one-way valve typically has a high flow resistance at the stopper position of the stopper 40. However, by providing tapered surfaces on both sides of the stopper position, the present invention effectively guides the medium before and after the stopper position, effectively reducing the overall flow resistance of the one-way valve.

[0038] like Figure 3 As shown, in a specific embodiment of the present invention, the first conical surface 41 and the second conical surface 42 are located on the same conical surface, so that the flow of the medium is smoother, the flow capacity at the limiter 40 is increased, and the flow rate is maximized in the smallest space.

[0039] The first tapered surface 41 and the second tapered surface 42 allow the flow area of the medium to change gradually without sudden changes, thereby reducing the impact of area changes on the flow of the medium and avoiding medium turbulence caused by sudden changes in area.

[0040] Alternatively, as Figure 3 As shown, the inner diameter of one end of the first conical surface 41 close to the flow port 21 is smaller than the inner diameter of the other end of the first conical surface 41 ; the inner diameter of one end of the second conical surface 42 close to the flow port 21 is smaller than the inner diameter of the other end of the second conical surface 42 .

[0041] It is understood that the inner diameter of the first tapered surface 41 gradually decreases from the end closest to the flow opening 21 to the end facing away from the flow opening 21; and the inner diameter of the second stopper 44 gradually decreases from the end closest to the flow opening 21 to the end facing away from the flow opening 21. The flow area of the medium gradually decreases from the second tapered surface 42 to the first tapered surface 41, allowing the medium to flow along the first and second tapered surfaces 41, 42. During the flow of the medium, the flow area changes gradually, without sudden changes. This prevents the medium from significantly impacting the stopper 40 due to sudden changes in the flow area.

[0042] Specifically, the valve body includes a first section 11 and a second section 12 that are interconnected. The inner diameter of the second section 12 is smaller than that of the first section 11. A first limiting surface is formed between the first and second sections 11, and the limiting member 40 is located within the first section 11 and abuts against the first limiting surface. The second tapered surface 42 is connected to the second section 12 at one end near the flow opening 21, and the inner diameter of the second tapered surface 42 at one end near the flow opening 21 is equal to the inner diameter of the second section 12. In this embodiment, the limiting member 40 is located in the first section 11 and abuts against the first limiting surface. It will be understood that the first limiting surface limits the limiting member 40, so that the limiting member 40 is fixed in position within the guide tube 10 and does not move during use of the one-way valve.

[0043] like Figure 3As shown, the limiting member 40 includes a first limiting portion 43 and a second limiting portion 44 that are connected to each other. The inner diameter of the first limiting portion 43 is smaller than the inner diameter of the second limiting portion 44. The second limiting portion 44 is arranged on the side of the first limiting portion 43 close to the flow port 21. The end of the blocking member 30 close to the limiting member 40 has a matching section 31. The end face of the first limiting portion 43 close to the flow port 21 is matched with the stopper at one end of the blocking member 30 close to the limiting member 40, and the matching section 31 can be inserted into the inner circle of the second limiting portion 44.

[0044] The end surface of the first limiting portion 43 blocks the end surface of the blocking member 30 close to the limiting member 40 , so that the blocking member 30 cannot escape from the valve body. The blocking member 30 moves between the flow port 21 and the limiting member 40 to open and close the flow port 21 .

[0045] The second limiting portion 44 is loosely engaged with the matching section 31 to prevent the inner ring of the second limiting portion 44 from blocking the blocking member 30 , thereby ensuring flexible movement of the blocking member 30 .

[0046] It is conceivable that the second conical surface 42 guides the blocking member 30 so that the fitting section 31 enters the inner circle of the second limiting portion 44 .

[0047] like Figure 3 As shown, the first tapered surface 41 is provided on the inner circle of the first limiting portion 43 , and the second tapered surface 42 is provided on the inner circle of the second limiting portion 44 .

[0048] The first conical surface 41 and the second conical surface 42 are respectively arranged on the first limiting portion 43 and the second limiting portion 44, so that the first conical surface 41 can guide the buffer medium while the end face of the first limiting portion 43 can stop the end face of the sealing member 30; while the second conical surface 42 guides the buffer medium, the inner ring of the second limiting portion 44 can radially limit the mating section 31 of the sealing member 30.

[0049] Optionally, the first conical surface 41 and the second conical surface 42 can be selected to have an inner diameter that gradually decreases or increases from the direction close to the flow port 21 to the direction away from the flow port 21. In this way, the flow capacity at the position of the limit member 40 can be adjusted.

[0050] It can be imagined that in a specific embodiment of the present invention, the first conical surface 41 and the second conical surface 42 are first processed, and then the first limit portion 43 and the second limit portion 44 are processed to ensure that the first conical surface 41 and the second conical surface 42 are on the same conical surface, thereby guiding the medium, buffering the impact of the medium, and increasing the flow capacity of the one-way valve.

[0051] like Figure 2As shown, when the first limiting portion 43 cooperates with the blocking member 30 , the first limiting portion 43 and the blocking member 30 are in surface contact, and the end surface of the first limiting portion 43 and the blocking member 30 where the stop cooperates is perpendicular to the movement direction of the blocking member 30 .

[0052] With this arrangement, the end face of the first limiting portion 43 close to the flow port 21 abuts against the end face of the blocking member 30 close to the limiting member 40, and no circumferential limiting relationship occurs. When the blocking member 30 tilts or changes its angle during movement, the blocking member 30 and the limiting member 40 will not get stuck, thereby ensuring the flexible movement of the blocking member 30.

[0053] like Figure 1 and Figure 3 As shown, the blocking member 30 has a fitting section 31 at one end close to the limiting member 40, the maximum spacing of the outer side walls of the fitting section is E, the inner diameter of the second limiting portion 44 is F, F is greater than E, and the difference between F and E ranges from 0.3mm to 1.5mm.

[0054] By setting F to be greater than E, a clearance fit is achieved between the second limiting portion 44 and the mating segment 31. The second limiting portion 44 radially limits the mating segment 31, so that the mating segment 31 can smoothly enter and exit the inner ring of the second limiting portion 44, and prevents the second limiting portion 44 and the mating segment 31 from getting stuck, thereby affecting the normal operation of the sealing member 30.

[0055] like Figure 1 As shown, the blocking member 30 includes a blocking member body 33 and a guide structure 34 . The guide structure 34 is provided on the periphery of the blocking member body 33 . The blocking member body 33 blocks or opens the flow port 21 . The guide structure 34 is in sliding cooperation with the valve body.

[0056] The sealing member body 33 is used to seal or open the flow port 21. A guide structure 34 is provided circumferentially around the sealing member body 33 to guide the sealing member 30, allowing it to move along the axis of the valve body. When the pressure on the side of the sealing member 30 closer to the flow port 21 is greater than the pressure on the side of the sealing member 30 facing away from the flow port 21, the flow port 21 is opened, and the guide structure 34 guides the sealing member 30 to move along the axis of the valve body away from the flow port 21. When the pressure on the side of the sealing member 30 closer to the flow port 21 is less than the pressure on the side of the sealing member 30 facing away from the flow port 21, the end of the sealing member body 33 closer to the flow port 21 seals the flow port 21.

[0057] like Figure 1 As shown, the guide structure 34 includes a plurality of fin structures 341 , which are arranged along the circumference of the blocking member body 33 , one side of the fin structure 341 is connected to the blocking member body 33 , and the other side of the fin structure 341 is slidably fitted with the valve body.

[0058] It can be imagined that multiple fin structures 341 are arranged circumferentially on the sealing member body 33, so that the guiding effect of the fin structure 341 on the sealing member 30 is more uniform, and the sealing member 30 will not undergo angular deflection during movement along the axial direction of the valve body, and the sealing member 30 and the valve body are not easily stuck.

[0059] like Figure 1 As shown, the valve body includes a guide tube 10 and a base 20. The outer ring of the base 20 is connected to the inner wall of the guide tube 10. The base 20 has a flow opening 21. The blocking member 30 is movably arranged in the guide tube 10 to open and close the flow opening 21. It should be noted that, as Figure 2 As shown, the guide tube 10 includes a first section 11 and a second section 12 .

[0060] The blocking member 30 is movably disposed in the guide tube 10 , and the base 20 and the limiting member 40 are respectively disposed on both sides of the blocking member 30 to limit the blocking member 30 in the guide tube 10 . The blocking member 30 is driven by the pressure difference on both sides to open and close the flow port 21 .

[0061] The advantages of this solution are:

[0062] 1. The inner ring of the stopper 40 has a first conical surface 41 and a second conical surface 42, which guide the medium so that the medium can flow along the first conical surface 41 and the second conical surface 42, thereby reducing the flow resistance at the stopper;

[0063] 2. The first conical surface 41 and the second conical surface 42 are located on the same conical surface, which makes the flow of the medium smoother, increases the flow capacity at the limiter 40, and maximizes the flow in the smallest space;

[0064] 3. The second conical surface 42 guides the blocking member 30 so that the fitting section 31 enters the inner ring of the second limiting portion 44;

[0065] 4. The second limiting portion 44 and the matching section 31 are loosely matched to prevent the inner ring of the second limiting portion 44 from blocking the blocking member 30, thereby ensuring the flexible movement of the blocking member 30;

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. 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.

[0067] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0068] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0069] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0070] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0071] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

Claims

1. A one-way valve, characterized in that: include: a valve body having a flow opening (21); a blocking member (30), the blocking member (30) being movably disposed in the valve body to open and close the flow port (21); A limit member (40), the limit member (40) is arranged on a side of the sealing member (30) away from the flow port (21), wherein the outer ring of the limit member (40) is connected to the valve body, and the inner ring of the limit member (40) has a first conical surface (41) and a second conical surface (42), and the first conical surface (41) and the second conical surface (42) are arranged at intervals along the axial direction of the valve body. The limit member (40) is used to stop and limit the sealing member (30), and the stop limit position is located between the first conical surface (41) and the second conical surface (42), and the first conical surface (41) and the second conical surface (42) are used to guide the medium.

2. The one-way valve according to claim 1, characterized in that: The first conical surface (41) and the second conical surface (42) are located on the same conical surface.

3. The one-way valve according to claim 1, characterized in that The inner diameter of one end of the first conical surface (41) close to the circulation port (21) is smaller than the inner diameter of the other end of the first conical surface (41); the inner diameter of one end of the second conical surface (42) close to the circulation port (21) is smaller than the inner diameter of the other end of the second conical surface (42).

4. The one-way valve according to claim 3, characterized in that: The valve body includes a first section (11) and a second section (12) connected to each other, the inner diameter of the second section (12) is smaller than the inner diameter of the first section (11), a first limit surface is formed between the first section (11) and the second section (12), the limit member (40) is located in the first section (11) and abuts against the first limit surface, the second conical surface (42) is connected to the second section (12) at one end close to the flow port (21), and the inner diameter of the second conical surface (42) at one end close to the flow port (21) is equal to the inner diameter of the second section (12).

5. The one-way valve according to claim 1, characterized in that: The limiting member (40) comprises a first limiting portion (43) and a second limiting portion (44) connected to each other, the inner diameter of the first limiting portion (43) is smaller than the inner diameter of the second limiting portion (44), the second limiting portion (44) is arranged on a side of the first limiting portion (43) close to the circulation port (21), and the end surface of the first limiting portion (43) close to one end of the circulation port (21) cooperates with a stopper at one end of the blocking member (30) close to the limiting member (40).

6. The one-way valve according to claim 5, characterized in that: The first conical surface (41) is arranged on the inner ring of the first limiting portion (43), and the second conical surface (42) is arranged on the inner ring of the second limiting portion (44).

7. The one-way valve according to claim 5, characterized in that When the first limiting portion (43) cooperates with the blocking member (30) stopper, the first limiting portion (43) is in surface contact with the blocking member (30), and the end surface of the first limiting portion (43) and the blocking member (30) stopper that cooperates is perpendicular to the movement direction of the blocking member (30).

8. The one-way valve according to claim 5, characterized in that: The blocking member (30) has a fitting section (31) at one end close to the limiting member (40), the maximum spacing between the outer side walls of the fitting section (31) is E, the inner diameter of the second limiting portion (44) is F, F is greater than E, and the difference between F and E ranges from 0.3 mm to 1.5 mm.

9. The one-way valve according to claim 1, characterized in that: The blocking member (30) comprises a blocking member body (33) and a guide structure (34), wherein the guide structure (34) is arranged on the periphery of the blocking member body (33), the blocking member body (33) blocks or opens the flow port (21), and the guide structure (34) is in sliding cooperation with the valve body.

10. The one-way valve according to claim 9, characterized in that The guide structure (34) includes a plurality of fin structures (341), and the plurality of fin structures (341) are arranged along the circumference of the sealing member body (33). One side of the fin structure (341) is connected to the sealing member body (33), and the other side of the fin structure (341) is slidably matched with the valve body. The sealing member (30) has a matching section (31) at one end close to the limiting member (40), and the matching section (31) is arranged on the fin structure (341).

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