A one-way valve for a wind pump

Abstract

This application discloses a one-way valve for a windshield pump, belonging to the field of pump technology. The one-way valve includes: a valve body, a valve ball, an elastic element, a valve seat, and a valve cover covering the upper surface of the valve body. The valve ball comprises an integrally formed sphere and a cylinder; in a static state, the cylindrical portion of the valve ball is embedded in the elastic element, forming a gap between them. The valve ball is pressed against the valve seat by its own weight to achieve a seal. The upper end of the elastic element is fixedly connected to the valve cover. This application's solution can limit the movement of the valve ball, preventing its deviation and enabling timely and accurate reset. It also achieves rapid response, reduces the contact time between the valve ball and the elastic element during its up-and-down movement, reduces fluctuations in the liquid medium, reduces wear, and increases service life.

Description

Technical Field

[0001] This application relates to the field of pump technology, and in particular to a check valve for a wind bag pump. Background Technology

[0002] Airbag pumps are widely used in industries such as semiconductors, photovoltaic solar cells, light-emitting diodes, liquid crystal displays, and electronics, primarily for conveying clean liquids. The main components of an airbag pump used in semiconductor wet processes are the airbag and a check valve. The pump chamber of the airbag is divided into two working chambers, each consisting of a gas phase working chamber and a liquid phase working chamber. After compressed air enters the gas phase working chamber, the compressed airbag deforms and moves. The reversing valve controls the compressed air to sequentially enter the two gas phase working chambers. The alternating suction and discharge of liquid in the liquid phase chamber achieves the conveying of the fluid.

[0003] A check valve, also known as a non-return valve or check valve, primarily controls the flow direction of the medium in a pneumatic pump, preventing backflow and protecting the equipment's normal operation. Therefore, the valve ball needs to reset promptly and accurately, ensuring a tight seal with the valve seat upon reset to guarantee good sealing, prevent backflow, and ensure normal operation. Patent CN216279574U discloses a novel elastic check valve structure, which uses an elastic element installed within the valve cavity of the valve body to facilitate timely and accurate reset of the valve ball. However, in this patent, the lower end of the elastic element directly abuts against the valve ball, resulting in constant contact between the valve ball and the elastic element, which easily increases wear on the valve ball. Furthermore, with the spring pressing against the valve ball, the valve ball must overcome not only its own weight but also the resistance of the elastic element to begin moving, requiring greater fluid pressure. This leads to a delayed valve ball response and difficulty in rapid opening. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a one-way valve for a wind bag pump. This one-way valve has a fast response and can reset accurately and promptly, thereby ensuring good sealing performance.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A one-way valve for a wind bag pump includes: a valve body, a valve ball, an elastic element, a valve seat, and a valve cover covering the upper end face of the valve body; The valve ball comprises an integrally formed sphere and a cylinder. In a static state, the cylindrical part of the valve ball is embedded in an elastic element and a gap is formed between the elastic element and the sphere. The elastic element does not contact the spherical part of the valve ball. The valve ball is pressed against the valve seat by its own weight to achieve a seal. The upper end of the elastic element is fixedly connected to the valve cover.

[0006] Optionally, the upper and lower ends of the valve body are respectively connected to the liquid outlet and the liquid inlet, and the valve body has an axially penetrating valve cavity; the valve cover has a through hole and is connected to the liquid outlet; the valve seat is provided with a valve seat through hole that is connected to the liquid inlet and the valve cavity.

[0007] Optionally, the through holes on the valve cover include: a central through hole disposed along the central axis of the valve cover, and peripheral through holes disposed at intervals on the outer periphery of the valve cover.

[0008] Optionally, the diameter D of the valve ball is related to the diameter d of the cylinder in the following order: D > d, preferably 0.3d ≤ D ≤ 0.7d.

[0009] Optionally, the diameter of the valve ball cylinder is smaller than the inner diameter of the elastic element, which ensures that the cylinder can be inserted into the elastic element, and a gap is formed between the cylinder and the elastic element. This gap should not be too large.

[0010] Optionally, the diameter of the ball, the diameter of the cylinder, and the length of the valve ball are not specifically limited, and can be adjusted according to the diameter of the valve ball, the length of the valve cavity, and the length of the elastic element in its natural state; in order to reduce the weight of the valve ball and avoid the valve ball from not responding quickly when the pressure changes, the cylinder of the valve ball can be a hollow structure.

[0011] Optionally, to ensure accurate reset of the valve ball, the diameter of the valve ball is smaller than the inner diameter of the valve cavity. Preferably, the diameter of the valve ball is 0.8-0.9 times the inner diameter of the valve cavity.

[0012] Optionally, the elastic element has a spring-like structure, and the spring can be right-handed or left-handed. The number of spring coils and the spring pitch are designed according to the required elastic force. The elastic element is made of the same material as the valve ball.

[0013] The valve ball of this application is an integrally formed sphere and cylindrical structure. In the static state, part of the cylindrical part is inserted into the elastic element to limit the movement of the valve ball, avoiding valve ball displacement caused by unstable fluid medium. This allows the valve ball to reset promptly and accurately, achieving sealing and preventing liquid backflow. The elastic element does not directly contact the valve ball but leaves a certain gap. That is, the cylinder of the valve ball is only partially, not entirely, embedded in the elastic element, and the cylinder of the valve ball has a hollow structure. This avoids the spring pressing against the valve ball, which would increase the movement resistance, thus enabling a rapid response. It also reduces the contact time between the valve ball and the elastic element during the up-and-down movement of the valve ball, reducing wear and increasing service life.

[0014] Optionally, the diameter of the valve cavity of the valve body is larger than the diameter of the ball portion of the valve ball, forming a fluid passage.

[0015] Optionally, the lower end face of the valve cover is symmetrically provided with multiple bosses, and the upper end of the elastic element is fixedly connected to the valve cover through the bosses; at least two bosses are provided.

[0016] As a further embodiment, an annular limiting plate is provided on the lower end face of the upper valve cover. A central flow hole is provided at the center of the annular limiting plate along the axial direction, which is connected to the central through hole provided on the valve cover. The diameter of the central flow hole is smaller than the diameter of the elastic element, so that the upper end of the elastic element can abut against the annular limiting plate to achieve a fixed connection. Multiple peripheral flow holes are also provided at intervals on the outer periphery of the annular limiting plate, and the peripheral flow holes are connected to the peripheral through holes provided on the valve cover.

[0017] The annular limiting plate has a central flow hole along the axial direction that communicates with the through hole of the valve cover. The diameter of the central flow hole is smaller than the diameter of the elastic element, so that the upper end of the elastic element can abut against the annular limiting plate to achieve a fixed connection. The annular limiting plate also has multiple peripheral flow holes spaced apart on its outer periphery, which communicate with the peripheral through hole on the valve cover.

[0018] Optionally, the valve seat through hole is cylindrical, and the diameter of the valve seat through hole is smaller than the diameter of the valve ball.

[0019] As a further embodiment, the portion of the valve seat through hole near the liquid inlet is an upwardly tapering horn-shaped valve seat through hole, while the portion away from the liquid inlet is a cylindrical valve seat through hole, the diameter of which is smaller than the diameter of the valve ball.

[0020] Optionally, the portion of the valve seat that abuts against the valve ball is a spherical cutout, and the diameter of the spherical cutout is larger than the diameter of the valve ball. During operation, the spherical cutout increases the contact area between the valve ball and the valve seat, reduces the wear rate, and increases service life.

[0021] Optionally, the valve body, valve ball, elastic element, and valve seat are made of PTFE or PFA material.

[0022] The beneficial effects that this application may produce include, but are not limited to: 1. The one-way valve for the wind bag pump of this application is designed by integrally molding the valve ball into a ball and a cylinder, and by inserting the cylinder of the valve ball into an elastic element to limit the movement of the valve ball, thereby preventing the valve ball from deviating. When the valve ball resets, it can reset in a timely and accurate manner, achieving sealing and blocking, preventing liquid backflow, and also achieving rapid response and reducing wear of the valve ball. At the same time, an elastic element limiting plate with a flow hole is provided to reduce the fluctuation of the liquid medium, thereby reducing the vibration of the wind bag pump as a whole, thus reducing the impact on the one-way valve, reducing the wear of the one-way valve, and increasing the sealing performance.

[0023] 2. The one-way valve for the airbag pump of this application, by setting the valve ball as an integrally formed ball and cylinder, and inserting the cylindrical part of the valve ball into the elastic element, limits the movement of the valve ball, avoiding deviation of the valve ball movement caused by fluctuations in the liquid medium or the operation of the airbag pump, which would prevent the valve ball from timely contacting the valve seat for sealing during reset, increasing the possibility of backflow. Under the action of the elastic element, the valve ball can quickly and without deviation reset, contacting the valve seat for sealing, thereby achieving the purpose of rapid sealing and preventing backflow. The elastic element does not directly contact the valve ball but leaves a certain gap, that is, the cylinder of the valve ball is only partially, not completely, embedded in the elastic element, and the cylinder of the valve ball has a hollow structure, which avoids the spring abutting against the valve ball and increasing the movement resistance, thus enabling rapid response. At the same time, it reduces the increase in movement displacement of the valve ball due to position deviation and the contact and collision with the valve body, reduces the wear of the valve ball, valve body, etc., reduces the wear of the one-way valve, increases the service life, and enables it to still achieve good sealing effect after long-term operation.

[0024] 3. The one-way valve for the airbag pump of this application, by setting an elastic limiting plate with a flow passage hole, diverts the liquid medium, reduces the fluctuation of the liquid medium, thereby reducing the vibration of the airbag pump as a whole, which helps to reduce the impact on the one-way valve, reduce the wear of the one-way valve, and increase the sealing performance.

[0025] 4. The one-way valve for the wind bag pump of this application, by making the part of the valve seat through hole near the liquid inlet into an upwardly constricted funnel shape, allows the fluid velocity to gradually increase when entering the valve chamber, thereby generating a greater impact force to push the valve ball and improving the response speed. Attached Figure Description

[0026] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the one-way valve for the airbag pump shown in Embodiment 1 of this application; Figure 2 This is a schematic diagram of the one-way valve for the airbag pump shown in Embodiment 2 of this application; Figure 3 This is a schematic diagram of the one-way valve for the wind bag pump shown in Embodiment 3 of this application.

[0027] Explanation of reference numerals in the attached drawings: 1-valve body, 11-valve cavity, 2-valve ball, 21-ball, 22-cylinder, 3-elastic element, 4-valve seat, 41-valve seat through hole, 411-horn-shaped valve seat through hole, 412-cylinder valve seat through hole, 5-valve cover, 51-center through hole, 52-outer peripheral through hole, 53-boss, 54-annular limiting plate, 541-center flow hole, 542-outer peripheral flow hole. Detailed Implementation

[0028] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0030] Furthermore, it should be understood in the description of this application that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] 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 one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0034] Example 1 refer to Figure 1 The embodiments of this application disclose a one-way valve for a wind bag pump, including: a valve body 1, a valve ball 2, an elastic element 3, a valve seat 4, and a valve cover 5 covering the upper end face of the valve body 1; the valve ball 2 includes an integrally formed ball 21 and a cylinder 22, and in a static state, the cylindrical part of the valve ball 2 is embedded in the elastic element 3 and a gap is formed between the elastic element and the elastic element; the valve ball 2 is pressed against the valve seat 4 by its own weight to achieve a seal; the upper end of the elastic element 3 is fixedly connected to the valve cover 5.

[0035] It should be noted that the above-mentioned "cylinder 22 partially embedded in elastic element 3" means that in the static state, cylinder 22 is only partially embedded in elastic element 3, that is, sphere 21 and elastic element 3 are not in contact.

[0036] Specifically, the upper and lower ends of the valve body 1 are connected to the liquid outlet and the liquid inlet, respectively, and the valve body 1 has an axially penetrating valve cavity 11 inside; the valve cover 5 has a through hole and is connected to the liquid outlet; the valve seat 4 is provided with a valve seat through hole 41 that is connected to the liquid inlet and the valve cavity 11.

[0037] Specifically, the through holes on the valve cover 5 include: a central through hole 51 arranged along the central axis of the valve cover 5, and peripheral through holes 52 spaced apart on the outer periphery of the valve cover 5. It should be noted that the central through hole is only one and serves as the main fluid channel, while the peripheral through holes act as diversion points and can be multiple.

[0038] Specifically, the diameter D of the sphere 21 and the diameter d of the cylinder 22 are related as follows: D > d, preferably 0.3d ≤ D ≤ 0.7d.

[0039] Specifically, the diameter of the cylinder 22 is smaller than the inner diameter of the elastic element 3, which ensures that the cylinder 22 can be inserted into the elastic element 3, and a gap is formed between the cylinder 22 and the elastic element 3. This gap should not be too large.

[0040] Specifically, the length and diameter of the cylinder 22 are not specifically limited, and can be adjusted according to the diameter of the valve ball, the length of the valve cavity, and the length of the elastic element in its natural state; in order to reduce the weight of the valve ball and avoid the valve ball not responding quickly when the pressure changes, the cylinder 22 can be a hollow structure.

[0041] Specifically, to ensure that the valve ball can be accurately reset, the diameter of the valve ball is smaller than the inner diameter of the valve cavity. Preferably, the diameter of the valve ball is 0.8-0.9 times the inner diameter of the valve cavity.

[0042] Specifically, the elastic element 3 has a spring-like structure. The spring can be right-handed or left-handed. The number of spring coils and the spring pitch are designed according to the required elastic force. The elastic element 3 is made of the same material as the valve ball 2.

[0043] The aforementioned valve ball and elastic element configuration allows the elastic element to limit the movement of the valve ball, preventing fluctuations in the liquid medium or the operation of the air pump from causing the valve ball to deviate from its intended position. This would prevent the valve ball from promptly contacting the valve seat for a seal upon reset, increasing the possibility of backflow. Under the action of the elastic element, the valve ball can quickly and without deviation reset, contacting the valve seat for a seal, thus achieving rapid sealing and preventing backflow. The elastic element does not directly contact the valve ball but leaves a certain gap; that is, the cylinder of the valve ball is only partially, not entirely, embedded in the elastic element, and the cylinder of the valve ball has a hollow structure. This avoids the spring pressing against the valve ball, increasing movement resistance and enabling rapid response. It also reduces the contact time between the valve ball and the elastic element during its up-and-down movement, reducing wear. Increased displacement due to positional deviation and collisions with the valve body reduce wear on the valve ball and valve body, increasing service life and ensuring good sealing even after prolonged operation. Specifically, the valve cavity diameter of valve body 1 is larger than the diameter of the ball portion of the valve ball, forming a fluid channel.

[0044] Specifically, multiple bosses 53 are symmetrically arranged on the lower end face of the valve cover 5, and the upper end of the elastic member 3 is fixedly connected to the valve cover 5 through the bosses 53; at least two bosses 53 are provided.

[0045] Specifically, the valve seat through hole 41 is cylindrical, and its diameter is smaller than that of the valve ball 2. This means that the diameter of the valve seat through hole 41 is smaller than the diameter of the ball 21 of the valve ball 2.

[0046] Specifically, the contact portion between the valve seat 4 and the valve ball 2 is a spherical cutout, the diameter of which is slightly larger than the diameter of the valve ball. During operation, the spherical cutout increases the contact area between the valve ball and the valve seat, reducing the wear rate and increasing service life.

[0047] Specifically, the valve body 1, valve ball 2, spring 3, and valve seat 4 are all made of PTFE, PEEK, or PFA materials. Using the same material for the valve body, valve ball, and valve seat reduces wear on the components of the check valve, increases its service life, and enhances its sealing performance.

[0048] In the aforementioned check valve, when not in operation, the valve ball 2 seals against the valve seat 4 under its own weight, with the cylindrical portion 22 of the valve ball 2 embedded in the elastic element 3. At this time, the elastic element 3 is in its normally extended state and does not contact the ball 21 of the valve ball. During normal operation, the liquid medium enters the valve seat through-hole 41 through the inlet 11. When the pressure in the valve seat through-hole 41 reaches a certain level, the valve ball 2 separates from the valve seat 4 under the action of the liquid medium and moves upward. The liquid medium continues to flow, flowing out through the through-hole of the valve cover and the outlet 12. When the liquid medium continues to flow and the flow rate gradually decreases, the valve ball quickly resets under its own weight and the force of the elastic element, and the valve ball and valve seat seal in time.

[0049] Example 2 In this embodiment, the one-way valve for the airbag pump has a similar structure to that in Embodiment 1, the difference being that the fixed connection between the elastic element and the valve cover is an annular limiting plate; specifically, see... Figure 3 An annular limiting plate 54 is provided on the lower end face of the valve cover 5. A central flow hole 541 is provided at the center of the annular limiting plate 54 along the axial direction, which is connected to the central through hole 51 provided on the valve cover. The diameter of the central flow hole 541 is smaller than the diameter of the elastic member 3, so that the upper end of the elastic member 3 can abut against the annular limiting plate 54 to achieve a fixed connection. Multiple peripheral flow holes 542 are also provided at intervals on the outer periphery of the annular limiting plate 54. The peripheral flow holes 542 are connected to the peripheral through holes 52 provided on the valve cover 5.

[0050] The diameter of the central through-hole on the valve cover is smaller than the inner diameter of the valve cavity. When the fluid enters the central through-hole from the valve cavity, the channel narrows and the velocity suddenly increases, which increases fluid fluctuations and thus increases the vibration of the airbag pump. This application provides a peripheral through-hole on the valve cover, and a central flow-through hole and a peripheral flow-through hole on the annular limiting plate to divert the liquid medium, which can significantly reduce the fluctuations of the outflowing liquid medium and thus reduce the problems caused by the vibration of the airbag pump.

[0051] Example 3 In this embodiment, the one-way valve for the airbag pump has a similar structure to that in Embodiment 1 or 2, the difference being the valve seat through hole; specifically, see... Figure 3 The valve seat through hole 41 is divided into upper and lower parts. The part near the liquid inlet is an upwardly tapering trumpet-shaped valve seat through hole 411, and the part away from the liquid inlet is a cylindrical valve seat through hole 412. The diameter of the cylindrical valve seat through hole is smaller than the diameter of the valve ball. This means that the diameter of the cylindrical valve seat through hole 412 is smaller than the diameter of the ball 21 of the valve ball 2.

[0052] Compared to the cylindrical valve seat through-hole in Embodiment 1 or Embodiment 2, the valve seat through-hole in this embodiment is a funnel shape that tapers upwards near the liquid inlet. This allows the fluid to gradually increase in velocity as it enters the valve chamber, thereby generating a greater impact force to push the valve ball, improving the response speed and achieving a rapid response.

[0053] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0054] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A one-way valve for a wind pump, characterized in that, include: Valve body, valve ball, elastic element, valve seat, and valve cover covering the upper end face of the valve body; The valve ball comprises an integrally formed sphere and a cylinder. In a static state, the cylindrical part of the valve ball is embedded in an elastic element and a gap is formed between the valve ball and the elastic element. The valve ball is pressed against the valve seat by its own weight to achieve a seal. The upper end of the elastic element is fixedly connected to the valve cover.

2. The one-way valve for a wind pump according to claim 1, characterized in that, The upper and lower ends of the valve body are connected to the liquid outlet and the liquid inlet, respectively, and the valve body has an axially penetrating valve cavity inside; the valve cover has a through hole and is connected to the liquid outlet; the valve seat is provided with a valve seat through hole that is connected to the liquid inlet and the valve cavity.

3. The one-way valve for the airbag pump according to claim 2, characterized in that, The through holes on the valve cover include: a central through hole arranged along the central axis of the valve cover, and peripheral through holes spaced apart on the outer periphery of the valve cover.

4. The one-way valve for the airbag pump according to claim 3, characterized in that, The lower end face of the valve cover is symmetrically provided with multiple bosses, and the upper end of the elastic element is fixedly connected to the valve cover through the bosses; at least two bosses are provided.

5. The one-way valve for a wind pump according to claim 3, characterized in that, The lower end face of the valve cover is provided with an annular limiting plate. The center of the annular limiting plate is provided with a central flow hole that communicates with the central through hole provided on the valve cover along the axial direction. The diameter of the central flow hole is smaller than the diameter of the elastic element, so that the upper end of the elastic element can abut against the annular limiting plate to achieve a fixed connection.

6. The one-way valve for a wind pump according to claim 5, characterized in that, The outer periphery of the annular limiting plate is also provided with multiple peripheral flow holes at intervals, which are connected to the peripheral through holes provided on the valve cover.

7. The one-way valve for a wind pump according to claim 2, characterized in that, The valve seat through hole is cylindrical, and the diameter of the valve seat through hole is smaller than the diameter of the valve ball.

8. The one-way valve for a wind pump according to claim 2, characterized in that, The valve seat through hole is a flared valve seat through hole that tapers upwards near the liquid inlet, and a cylindrical valve seat through hole that is farther away from the liquid inlet. The diameter of the cylindrical valve seat through hole is smaller than the diameter of the valve ball.

9. The one-way valve for a wind pump according to claim 1, characterized in that, The portion of the valve seat that abuts against the valve ball is spherical, and the diameter of the spherical segment is larger than the diameter of the valve ball.

10. The one-way valve for a wind pump according to claim 1, characterized in that, The valve body, valve ball, elastic element, and valve seat are all made of PTFE or PFA material.

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