An adjustable unidirectional membrane

Abstract

This application relates to the field of unidirectional membranes, and more particularly to an adjustable unidirectional membrane, comprising: a base, the base including a planar cross-section, on which one or more channels for fluid passage are formed along the circumference of the base; the channels extending radially along the base; an elastic membrane mounted on the base, the elastic membrane including a sealing portion corresponding to each channel, the sealing portion extending along the extension direction of the channel and covering the cross-section, wherein in an initial state, the sealing portion closes the channel under its own pre-tightening force; an adjustment component disposed between the base and the elastic membrane, which is used to pull the sealing portion along the extension direction of the sealing portion to change the pre-tightening force of the sealing portion; by setting the adjustment component to pull the sealing portion, the stretching degree of the sealing portion can be adjusted by pulling the adjustment component, thereby changing the pre-tightening force of the sealing portion in the initial state.

Description

Technical Field

[0001] This application relates to the field of unidirectional membranes, and more particularly to an adjustable unidirectional membrane. Background Technology

[0002] One-way membranes mainly refer to membrane modules that enable fluid to flow in one direction. When fluid flows in the forward direction to apply pressure to the one-way membrane, the membrane opens its channels, allowing the fluid to pass through normally. Conversely, when fluid flows in the reverse direction to apply pressure to the membrane, the membrane closes, preventing the fluid from passing through.

[0003] In related technologies, the core component of this one-way membrane is an elastic silicone membrane (i.e., an elastic membrane). In the assembled state, a pre-tightening force is applied to the elastic membrane. Initially, the elastic membrane covers the channel opening through the pre-tightening force. When the fluid flows in the forward direction and the fluid pressure is greater than the pre-tightening force, it will squeeze the elastic membrane, causing it to bulge and form a gap for the fluid to pass through, thus achieving one-way conduction. In other words, the pre-tightening force of the elastic membrane determines the pressure required for the fluid to open the one-way membrane.

[0004] However, in the related technologies, the preload of the elastic membrane in the unidirectional membrane is generally fixed at the factory, and users cannot adjust the preload according to their own needs, so there is still room for improvement. Utility Model Content

[0005] In order to solve at least one of the technical problems mentioned in the background art, the purpose of this application is to provide an adjustable unidirectional membrane.

[0006] To achieve the above objectives, this application provides the following technical solution.

[0007] An adjustable unidirectional membrane, comprising:

[0008] The base includes a planar cross-section, on which one or more channels for fluid passage are formed along the circumference of the base; the channels extend radially along the base.

[0009] An elastic membrane is mounted on a base. The elastic membrane includes a sealing portion corresponding to each channel. The sealing portion extends along the extension direction of the channel and covers the cross surface. In the initial state, the sealing portion closes the channel under its own pre-tightening force.

[0010] An adjustment component, located between the base and the elastic membrane, is used to pull the closure portion along its extension direction to change the preload of the closure portion.

[0011] As an optional implementation, the end of the closed portion away from the center of the base is bent downward along the axial direction of the base to form an extension portion;

[0012] The adjustment assembly includes a pressing member capable of displacing relative to the base along the axial direction. The axial displacement of the pressing member is used to pull the extension along the axial direction to change the preload of the closure.

[0013] As an optional implementation, the end side of the extension is fixed with a protrusion that protrudes radially outward along the base. The protrusion is located directly below the pressing member, and the pressing member pulls the closing part by pressing down on the protrusion.

[0014] As an alternative implementation, the pressing member is annular and threadedly connected to the base, and the pressing member achieves axial displacement by rotating relative to the base.

[0015] As an optional implementation, a groove extending axially along the base is formed on the peripheral wall of the base, and a slider is fixedly connected to the end of the extension, and the slider is slidably disposed in the groove; the protrusion is formed on the slider.

[0016] As an optional implementation, the protrusion has ball bearings on the sidewall facing the pressing member.

[0017] As an optional implementation, the elastic membrane further includes a central portion, and one end of the closure portion near the center of the base is fixed to the central portion; the central portion is fixed to the cross-section.

[0018] As an optional implementation, the central part is provided with a through hole, and an axially upward extending stud is fixed on the cross surface. A washer and a nut are sequentially fitted on the stud. In the assembled state, the central part is passed through the stud and pressed between the washer and the cross surface by the nut.

[0019] As an optional implementation, the elastic membrane is a one-piece molded structure.

[0020] As an optional implementation, a cavity is formed on the sidewall of the base on the side opposite to the cross surface.

[0021] Compared with the prior art, this application has the following advantages:

[0022] In this application, an adjustment component is provided to pull the closure part. By pulling the adjustment component, the degree of tension of the closure part can be adjusted, thereby changing the preload of the closure part in the initial state.

[0023] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0024] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily apparent from the following detailed description taken in conjunction with the accompanying drawings. Several embodiments of this application are illustrated in the drawings by way of example and not limitation, in which:

[0025] In the accompanying drawings, the same or corresponding reference numerals indicate the same or corresponding parts.

[0026] Figure 1 An exploded view of this application is shown;

[0027] Figure 2 A schematic diagram of the structure in the assembled state of this application is shown;

[0028] Figure 3 A cross-sectional view of the present application in its assembled state is shown;

[0029] Figure 4 A schematic diagram of the structure of the elastic membrane of this application is shown.

[0030] Explanation of the labels in the diagram:

[0031] 1. Base; 11. Cross-section; 12. Channel; 13. Slide; 14. Stud; 15. Washer; 16. Nut;

[0032] 2. Elastic membrane; 21. Central part; 22. Sealing part; 23. Extension part; 24. Slider; 241. Protrusion; 242. Ball bearing;

[0033] 3. Pressing component. Detailed Implementation

[0034] To make the objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] Reference Figures 1-4 As shown, this embodiment provides an adjustable unidirectional membrane, which mainly includes a base 1, an elastic membrane 2, and an adjustment component.

[0036] The base 1 serves as the skeleton of the entire unidirectional membrane and can be a disc structure. In addition, in order to reduce the weight of the base 1, the bottom of the base 1 is hollowed out to form a cavity, which is equivalent to subtractive processing.

[0037] Among them, such as Figure 1As shown, the top surface of the base 1 has a planar structure to serve as the cross surface 11. It is worth noting that the cross surface 11 is preferably mirror-polished to improve its smoothness.

[0038] One or more channels 12 for fluid passage are provided on the cross-sectional surface 11, arranged circumferentially along the base 1. For example, this embodiment shows the use of four channels 12. In addition, the multiple channels 12 are arranged in a circular array along the circumferential direction of the base 1. Furthermore, each channel 12 extends radially along the base 1.

[0039] The elastic membrane 2 is installed on the base 1. The elastic membrane 2 refers to a membrane material that has tensile deformation and can elastically return to its original position. For example, the elastic membrane 2 can be a silicone membrane.

[0040] The elastic membrane 2 includes a sealing portion 22 corresponding to each channel 12, for example, Figure 1 In the middle, the four channels 12 correspond to four closed parts 22, and each closed part 22 is used to close one channel 12.

[0041] The closure 22 extends along the extension direction of the channel 12 (which can also be understood as the radial direction of the base 1) and covers the cross surface 11. In the initial state, the closure 22 closes the channel 12 under its own pre-tightening force.

[0042] The principle of its unidirectional flow is as follows: taking water flow as an example, the side of the base 1 with the extension 23 (i.e., the upper side of the base 1) is equivalent to the water outlet side, and the side of the base 1 opposite to the extension 23 (i.e., the lower side of the base 1) is equivalent to the water inlet side. When the water flows from the water inlet side to the water outlet side, that is, the pressure on the water inlet side is greater than the pressure on the water outlet side, so that under the action of water pressure, the water flow overcomes the pre-tightening force of the sealing part 22 and pushes the sealing part 22 upward to a height, so that the edge of the sealing part 22 is separated from the contact with the cross surface 11, thereby forming a gap, and the water flow can flow out through the gap.

[0043] Conversely, when water flows from the outlet side to the inlet side, the water pressure is downward, which pushes the sealing part 22 downward. As a result, the sealing part 22 will be firmly pressed against the cross surface 11, thereby sealing the channel 12 and allowing the water to flow to the inlet side, which is equivalent to reverse cutoff.

[0044] It is evident that whether the one-way membrane opens or not depends on whether the water pressure input on the inlet side is sufficient to overcome the pre-tension force of the elastic membrane 2. Therefore, in order to meet the opening requirements of the elastic membrane 2 under different water pressure conditions, in this embodiment, the pre-tension force of the elastic membrane 2 is designed to be adjustable. Specifically:

[0045] An adjustment component is located between the base 1 and the elastic membrane 2. It is used to pull the closure portion 22 along its extension direction to change the preload of the closure portion 22. That is, the more the closure portion 22 is stretched, the greater the preload it generates. Based on this, the preload of the closure portion 22 can be adjusted simply by controlling the degree of pulling of the closure portion 22.

[0046] In one specific implementation, the end of the closed portion 22 away from the center of the base 1 is bent downward along the axial direction of the base 1 to form an extension portion 23. The adjustment assembly includes a pressing member 3 that can be displaced relative to the base 1 along the axial direction of the base 1. The axial displacement of the pressing member 3 is used to pull the extension portion 23 along the axial direction to change the preload of the closed portion 22.

[0047] For example, the end side of the extension 23 is fixed with a protrusion 241 that protrudes outward along the radial direction of the base 1. The protrusion 241 is located directly below the pressing member 3. The pressing member 3 pulls the closing part 22 by pressing down the protrusion 241.

[0048] The pressing member 3 is annular and threadedly connected to the base 1. For example, the outer peripheral wall of the base 1 is provided with an external thread, and the inner annular wall of the pressing member 3 is provided with an internal thread that matches the external thread. The threaded connection between the external thread and the internal thread is achieved through the cooperation of the external thread and the internal thread. Thus, the axial movement of the pressing member 3 can be achieved simply by rotating the pressing member 3 relative to the base 1.

[0049] For example, when the pressing member 3 is rotated to move the pressing member 3 axially downward, the pressing member 3 can push the protrusion 241 downward, and the protrusion 241 will stretch the extension 23 downward, and the extension 23 will pull the closing part 22, thereby increasing the pre-tightening force of the closure; conversely, when the pressing member 3 is rotated to move the pressing member 3 axially upward, under the elastic reset of the closing part 22 and the extension 23 themselves, the closing part 22 and the extension 23 will gradually retract as the pressing member 3 moves upward, thereby reducing the pre-tightening force of the closing part 22.

[0050] In this scheme, all the extensions 23 are driven by the same component (i.e., the pressing member 3), so that all the closed parts 22 can be pulled synchronously and evenly.

[0051] To prevent the pressing member 3 from causing the protrusion 241 and the extension 23 to twist together when rotating, in some embodiments, a groove 13 extending axially along the base 1 is provided on the peripheral wall of the base 1. A slider 24 is fixedly connected to the end side of the extension 23. The slider 24 is slidably disposed in the groove 13. That is, under the restriction of the groove 13, the slider 24 can only slide vertically in the groove 13 and cannot rotate circumferentially. The protrusion 241 is formed on the slider 24.

[0052] Since the pressing member 3 comes into contact with and rotates relative to the protrusion 241 when pressing down on it, there will be a large sliding friction force. In order to reduce the friction force, in some embodiments, ball bearings 242 are provided on the side wall of the protrusion 241 facing the pressing member 3. Figure 3 As shown, the pressing member 3 is actually in contact with the ball 242, rather than with the protrusion 241. Since the ball 242 can roll in the protrusion 241, the friction force generated when the pressing member 3 rotates is the rolling friction force between the pressing member 3 and the ball 242.

[0053] To prevent the closure 22 from tilting up on the side away from the extension 23, in some embodiments, such as Figure 4 As shown, the elastic membrane 2 also includes a central portion 21, which is circular. The end of the closed portion 22 near the center of the base 1 is fixed to the central portion 21. In this embodiment, the elastic membrane 2 is an integrally formed structure, that is, the central portion 21, the closed portion 22, and the extension portion 23 are an integral structure.

[0054] In the assembled state, the central part 21 is coaxially fixed to the base 1 on the cross surface 11. Specifically, the central part 21 has a through hole at its center, and an axially upward extending stud 14 is fixed on the cross surface 11. The stud 14 is coaxially arranged with the base 1, and a washer 15 and a nut 16 are sequentially fitted onto the stud 14. In the assembled state, the central part 21 is pressed between the washer 15 and the cross surface 11 by the nut 16, thereby achieving the fixation of the central part 21.

[0055] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this application can be achieved, and this is not limited herein.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0057] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An adjustable unidirectional membrane, characterized in that, include: The base includes a planar cross-section, on which one or more channels for fluid passage are formed along the circumference of the base; the channels extend radially along the base. An elastic membrane is mounted on a base. The elastic membrane includes a sealing portion corresponding to each channel. The sealing portion extends along the extension direction of the channel and covers the cross surface. In the initial state, the sealing portion closes the channel under its own pre-tightening force. An adjustment component is located between the base and the elastic membrane, and is used to pull the closure part along the extension direction of the closure part to change the preload of the closure part; The end of the closed portion away from the center of the base is bent downward along the axial direction of the base to form an extension portion; The adjustment assembly includes a pressing member capable of displacing relative to the base along the axial direction. The axial displacement of the pressing member is used to pull the extension along the axial direction to change the preload of the closure. The end of the extension is fixed with a protrusion that protrudes outward along the radial direction of the base. The protrusion is located directly below the pressing member, and the pressing member pulls the closed part by pressing down on the protrusion. The pressing member is annular and threadedly connected to the base. The pressing member achieves axial displacement by rotating relative to the base.

2. The adjustable unidirectional membrane according to claim 1, characterized in that, A groove extending along the axial direction of the base is formed on the peripheral wall of the base, and a slider is fixedly connected to the end of the extension. The slider is slidably disposed in the groove; the protrusion is formed on the slider.

3. An adjustable unidirectional membrane according to claim 2, characterized in that, The protrusion has ball bearings on its sidewall facing the pressing member.

4. An adjustable unidirectional membrane according to claim 1, characterized in that, The elastic membrane also includes a central portion, and one end of the closed portion near the center of the base is fixed to the central portion; the central portion is fixed to the cross surface.

5. An adjustable unidirectional membrane according to claim 4, characterized in that, The central part is provided with a through hole, and an axially upward extending stud is fixed on the cross surface. A washer and a nut are sequentially fitted on the stud. In the assembled state, the central part is passed through the stud and pressed between the washer and the cross surface by the nut.

6. An adjustable unidirectional membrane according to claim 4, characterized in that, The elastic membrane is a one-piece molded structure.

7. An adjustable unidirectional membrane according to claim 1, characterized in that, A cavity is formed on the side wall of the base on the side opposite to the cross surface.

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