One-way valve

Abstract

The invention provides a one-way valve. The one-way valve comprises a valve body, a valve port, a supporting piece, a guide sleeve and a valve element. A valve cavity is formed in the valve body; the valve port is formed in the valve cavity and fixed to the valve body. The supporting piece is arranged in the valve cavity and fixed to the valve body, and a fluid channel is formed between the supporting piece and the valve body. The guide sleeve is arranged in the valve cavity and located between the valve port and the supporting piece, the guide sleeve comprises a mounting part and a transition part, the mounting part is fixed to the supporting piece, and the transition part is connected to the mounting part. The valve element is arranged on the guide sleeve and can move in the valve cavity in a reciprocating mode so as to open or close the valve port. A plane perpendicular to the center line of the valve body is defined as a cross section, and the area of the cross section of the transition part is gradually reduced from the valve port to the supporting piece.

Description

Technical Field

[0001] This application relates to the field of valves, and more specifically, to a one-way valve. Background Technology

[0002] A check valve is a control device used in fluid equipment. In related technologies, check valves function as a forward-opening valve and a reverse-closing valve in a system. During forward opening, to increase the check valve's flow rate and ensure it matches the pipeline flow rate, a check valve with a diameter much larger than the system pipeline diameter is typically used. This results in a larger check valve size and a larger flow rate, thus achieving the desired match between the check valve's opening flow rate and the pipeline flow rate. However, this larger size significantly increases the overall cost. Currently, there is a need for a check valve with a diameter closer to that of the system pipeline, but with a larger flow rate. Summary of the Invention

[0003] The main objective of this application is to overcome at least one of the defects of the prior art and to provide a one-way valve with a larger flow rate when the diameter is close to that of the system pipeline.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] According to one aspect of this application, a one-way valve is provided, comprising a valve body, a valve port, a support member, a guide sleeve, and a valve core. The valve body has a valve cavity inside. The valve port is disposed in the valve cavity and fixed to the valve body. The support member is disposed in the valve cavity and fixed to the valve body, and a fluid passage is formed between the support member and the valve body. The guide sleeve is disposed in the valve cavity and located between the valve port and the support member; the guide sleeve includes a mounting portion and a transition portion, the mounting portion being fixed to the support member, and the transition portion being connected to the mounting portion. The valve core is disposed in the guide sleeve and can reciprocate within the valve cavity to open or close the valve port. If a surface perpendicular to the centerline of the valve body is defined as a cross-section, then the area of ​​the cross-section of the transition portion gradually decreases from the valve port towards the support member.

[0006] According to one embodiment of this application, the guide sleeve further includes a guide portion connected to the transition portion, the valve core is sleeved on the guide portion, and can reciprocate along the guide portion.

[0007] According to one embodiment of this application, the mounting portion has a first through hole, the transition portion has a second through hole, and the guide portion has a third through hole. The first through hole, the second through hole, and the third through hole are connected. The first through hole is connected to the valve cavity, and the third through hole is connected to the inner cavity of the valve core.

[0008] According to one embodiment of this application, a clearance groove is provided at one end of the guide portion connected to the transition portion, and a stop portion is provided at one end of the transition portion facing the clearance groove. The clearance groove is used to avoid the valve core, and the valve core can abut against the stop portion.

[0009] According to one embodiment of this application, the valve core includes a bottom and a wall portion. The bottom is circular in shape, and the cross-section of the wall portion is annular. One end of the wall portion is connected to the bottom, and the other end can contact the stop portion. The wall portion can reciprocate along the guide portion.

[0010] According to one embodiment of this application, the wall portion includes a first portion and a second portion connected to each other, the second portion being connected to the bottom, the cross-sectional area of ​​the second portion gradually increasing from the bottom to the first portion, and the first portion being reciprocating along the guide portion.

[0011] According to one embodiment of this application, the inner wall of the first part is a cylindrical surface that can contact and move relative to the guide portion, and the wall thickness t of the first part gradually decreases from the second part toward the first part.

[0012] According to one embodiment of this application, the outer wall of the first part is a partially conical surface, and the apex angle of the cone on which the outer wall of the first part is located is α, then 5° < α < 10°.

[0013] According to one embodiment of this application, the plane containing the centerline of the valve body is defined as an axial plane, and the outer wall of the second part intersects the axial plane to form an intersection line, the intersection line including at least two arc segments, and the second part is smoothly connected to the first part and the bottom through the two arc segments respectively.

[0014] According to one embodiment of this application, the height of the transition portion along the centerline of the valve body is H1, then 2mm.

[0015] According to one embodiment of this application, the diameter of the outer wall of the valve core near the transition portion is defined as D1, and the diameter of the transition portion near the valve core is defined as D2, then D1 = D2.

[0016] According to one embodiment of this application, 7.6mm <D1<7.8mm。

[0017] ​According to one embodiment of this application, the plane containing the centerline of the valve body is defined as the axial plane, the shape of the transition part is a frustum, and the included angle between the two generatrices of the outer wall of the transition part on the axial plane is β, then 40°<β<50°.

[0018] According to one embodiment of this application, the support member includes a support body and at least two support arms. The support body is provided with a support hole, the mounting part is fixed in the support hole, and the support arms are connected to the support body and extend from the support body to the valve body.

[0019] According to one embodiment of this application, the transition portion abuts against the support body, and the outer diameter of the end of the transition portion facing the support body is greater than or equal to the outer diameter of the end of the support body facing the transition portion.

[0020] According to one embodiment of this application, the support body is a hollow frustum, the diameter of which gradually decreases from the transition portion toward the direction away from the transition portion; or the support body is a hollow cylinder.

[0021] According to one embodiment of this application, the inner wall of the valve body is provided with a limiting portion, and the support member is limited to the limiting portion.

[0022] According to one embodiment of this application, the wall thickness of the valve body between the support and the valve port is less than the wall thickness at both ends of the valve body.

[0023] As can be seen from the above technical solution, the advantages and positive effects of the one-way valve proposed in this application are as follows:

[0024] The one-way valve proposed in this application includes a valve body, a valve port, a support member, a guide sleeve, and a valve core. The support member supports the guide sleeve and the valve core within the valve body, and a flow channel for fluid passage exists between the support member and the valve body. The valve core can reciprocate along the guide sleeve to open or close the valve port, achieving one-way fluid flow. The guide sleeve includes a mounting section and a transition section. The mounting section is mounted on the support member, and the transition section is connected to the mounting section. Defining the surface perpendicular to the centerline of the valve body as the cross-section, the cross-sectional area of ​​the transition section gradually decreases from the valve port towards the support member. The design of the transition section of the guide sleeve, with its gradually decreasing cross-sectional area from the valve port towards the support member, significantly reduces the pressure resistance of the fluid flowing through the one-way valve, promoting laminar flow, reducing eddies at the fluid tail, and thus reducing pressure loss and eddies. Simultaneously, it lowers the static pressure of the fluid flowing through the valve cavity between the valve core and the valve body, further reducing the flow resistance of the fluid passing through the one-way valve, thereby increasing the opening flow rate. Attached Figure Description

[0025] The various objectives, features, and advantages of this application will become more apparent from the following detailed description of preferred embodiments in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of this application and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein:

[0026] Figure 1 This is a cross-sectional schematic diagram of the valve core in the closed valve port state of the first embodiment of the one-way valve of this application.

[0027] Figure 2 yes Figure 1 A cross-sectional view of a check valve with its spool open.

[0028] Figure 3 yes Figure 1 A three-dimensional schematic diagram of the support, guide sleeve and valve core of the embodiment.

[0029] Figure 4 yes Figure 1 A schematic diagram of fluid flow in a check valve.

[0030] Figure 5 yes Figure 1 A three-dimensional structural diagram of the support component of a one-way valve.

[0031] Figure 6 yes Figure 1 The front view of the guide sleeve of the check valve.

[0032] Figure 7 yes Figure 1 The front view of the valve core of the check valve.

[0033] Figure 8 yes Figure 1 A cross-sectional view of the valve core of a one-way valve.

[0034] Figure 9 This is a cross-sectional schematic diagram showing the valve core of the second embodiment of the one-way valve of this application in the open valve port state.

[0035] Figure 10 This is a cross-sectional schematic diagram showing the valve core in the open valve port state of the third embodiment of the one-way valve of this application.

[0036] Figure 11 yes Figure 10 A three-dimensional structural diagram of the support component of a one-way valve.

[0037] Figure 12 This is a cross-sectional schematic diagram showing the valve core in the open valve port state of the fourth embodiment of the one-way valve of this application.

[0038] The annotations in the attached figures are explained as follows:

[0039] 1-Check valve;

[0040] 10-Valve body;

[0041] 11-Valve port;

[0042] 12-Supporting component;

[0043] 13-Guide sleeve;

[0044] 14-Valve core;

[0045] 15-Fluid channels;

[0046] 101 - Valve chamber;

[0047] 102 - Limiting part;

[0048] 120 - Support hole;

[0049] 121 - Support body;

[0050] 122-Support arm;

[0051] 131-Installation Department;

[0052] 132-Transition section;

[0053] 133 - Guiding section;

[0054] 140 - Bottom;

[0055] 141-Wall section;

[0056] 142 - Inner wall of the valve core;

[0057] 143 - Outer wall of the valve core;

[0058] 200-intersection line;

[0059] 201, 202 - Arcs;

[0060] 203 - Straight Line;

[0061] 1310 - First through hole;

[0062] 1320 - Second through hole;

[0063] 1330 - Third through hole;

[0064] 1321 - Stop section;

[0065] 1331 - Clearance groove;

[0066] 1411 - Part One;

[0067] 1412 - Part Two;

[0068] S - Fluid flow direction;

[0069] α - The apex angle of the cone containing the outer wall of the first part of the valve core;

[0070] β - The angle between the two generatrices of the transition section on the axial plane;

[0071] H1 - Height of the transition section;

[0072] H2 - Height of the valve core;

[0073] t - Valve core wall thickness;

[0074] T - Valve body wall thickness;

[0075] D1 - The diameter of the outer wall of the valve core at the end near the transition section;

[0076] D2 - The diameter of the transition section near the valve core;

[0077] R1 - The radius of the arc closest to the first part;

[0078] R2 - The radius of the arc near the bottom. Detailed Implementation

[0079] Typical embodiments embodying the features and advantages of this application will be described in detail in the following description. It should be understood that this application can have various variations in different embodiments, all of which do not depart from the scope of this application, and the descriptions and drawings therein are for illustrative purposes only and not intended to limit this application.

[0080] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0081] In the following description of various exemplary embodiments of this application, reference is made to the accompanying drawings, which form part of this application, and which illustrate by way of example different exemplary structures, systems, and steps that can implement various aspects of this application. It should be understood that other specific solutions to components, structures, exemplary devices, systems, and steps may be used, and structural and functional modifications may be made without departing from the scope of this application. When describing the elements / components / etc. described and / or illustrated herein, the terms “first,” “second,” and “third,” etc., are used to indicate the presence of one or more elements / components / etc. The terms “comprising,” “including,” and “having” are used to indicate an open-ended inclusion and mean that additional elements / components / etc. may exist in addition to the listed elements / components / etc. Although the terms “above,” “below,” “between,” etc., may be used in this specification to describe different exemplary features and elements of this application, these terms are used herein only for convenience, such as the orientation according to the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of this application.

[0082] Relative terms such as “down” or “bottom” and “up” or “top” may be used herein to describe the relationship of one element to another, as illustrated in the figures. It should be understood that relative terms are intended to include different orientations of the device beyond those shown in the figures. For example, if a device in one of the figures is flipped, an element described as “down” or “bottom” of another element will be oriented “up” or “top” of that element. Thus, the exemplary term “down” can include both “down” and “up” orientations, and the term “bottom” can include both “bottom” and “top” orientations, depending on the specific orientation of the figure. Similarly, if a device in one of the figures is flipped, an element described as “down” or “bottom” of another element will be oriented “up” or “top” of that element. Thus, the exemplary term “bottom” or “below” can include both “up” and “down” orientations.

[0083] like Figures 1 to 3As shown, the one-way valve 1 of this application includes a valve body 10, a valve port 11, a support member 12, a guide sleeve 13, and a valve core 14. The valve body 10 has a valve cavity 101 inside. The valve port 11 is disposed in the valve cavity 101 and fixed to the valve body 10. The support member 12 is disposed in the valve cavity 101 and fixed to the valve body 10. The support member 12 has a support hole 120, and a fluid passage 15 is formed between the support member 12 and the valve body 10. The guide sleeve 13 is disposed in the valve cavity 101 and located between the valve port 11 and the support member 12. The guide sleeve 13 includes a mounting portion 131 and a transition portion 132. The mounting portion 131 is mounted in the support hole 120, and the transition portion 132 is connected to the mounting portion 131. The valve core 14 is disposed in the guide sleeve 13 and can reciprocate within the valve cavity 101 to open or close the valve port 11. If the surface perpendicular to the center line of the valve body 10 (that is, the center line of the support hole 120) is defined as the cross-section, then the area of ​​the cross-section of the transition part 132 gradually decreases from the valve port 11 to the support member 12.

[0084] In this application, the one-way valve 1 has a guide sleeve 13 transition section 132 designed with a cross-sectional area that gradually decreases from the valve port 11 to the support member 12. This significantly reduces the pressure resistance of the fluid flowing through the one-way valve 1, promoting laminar flow and reducing eddies at the fluid tail, thereby reducing pressure loss and eddies. Simultaneously, it lowers the static pressure of the fluid flowing through the valve cavity 101 between the valve core 14 and the valve body 10, further reducing the flow resistance of the fluid passing through the one-way valve 1, thus increasing the opening flow rate and improving the performance of the one-way valve 1.

[0085] In this embodiment, the guide sleeve 13 further includes a guide portion 133, which is connected to the transition portion 132. The valve core 14 is sleeved on the guide portion 133 and can reciprocate along the guide portion 133. The guide portion 133 enables the valve core 14 to reciprocate along the guide portion 133 to open or close the valve port 11. The guide portion 133 provides certain support and positioning for the valve core 14 and guides its reciprocating movement.

[0086] In this embodiment, the mounting portion 131 has a first through hole 1310, the transition portion 132 has a second through hole 1320, and the guide portion 133 has a third through hole 1330. The first through hole 1310, the second through hole 1320, and the third through hole 1330 are connected. The first through hole 1310 is connected to the valve cavity 101, and the third through hole 1330 is connected to the inner cavity of the valve core 14. The mounting portion 131, the transition portion 132, and the guide portion 133 of the guide sleeve 13 are respectively provided with interconnected first through holes 1310, second through holes 1320, and third through holes 1330, which can reduce the weight of the guide sleeve 13. At the same time, the first through holes 1310, the second through holes 1320, and the third through holes 1330 can allow fluid to flow in, which can appropriately reduce the impact of fluid on the one-way valve 1. The first through hole 1310, the second through hole 1320 and the third through hole 1330 can prevent air from accumulating in the cavity formed by the valve core and the guide sleeve, which would cause the valve core to slide obstructed.

[0087] In this embodiment, a clearance groove 1331 is provided at one end of the guide portion 133 connecting to the transition portion 132, and a stop portion 1321 is provided at one end of the transition portion 132 facing the clearance groove 1331. The clearance groove 1331 avoids the valve core 14, and the valve core 14 can abut against the stop portion 1321. The stop portion 1321 of the transition portion 132 and the clearance groove 1331 of the guide portion 133 can cooperate with each other to achieve a tight fit between the valve core 14 and the guide sleeve 13. When the valve core 14 opens the valve port 11 to allow fluid to pass through, the end of the transition portion 132 of the valve core 14 facing the guide sleeve 13 can be in close contact with the stop portion 1321 of the transition portion 132. This allows the flow channel formed by the valve core 10 and the outer surface of the guide sleeve 13 after the valve core 14 opens the valve port 11 to be teardrop-shaped, which helps to reduce flow resistance and increase the flow rate of the one-way valve 1.

[0088] Figure 4 This illustrates the fluid flow state when the one-way valve 1 of this application is open. From Figure 4 It can be seen that the fluid flows through the space between the valve core 14, the guide sleeve 13, the support body 121 and the valve body 10. The fluid flows through the one-way valve 1 along the fluid flow direction S, and the fluid flow channel formed is teardrop-shaped. The teardrop-shaped flow channel can reduce the pressure of the fluid passing through the one-way valve 1 along the outer wall of the valve core 14, reduce the wake, facilitate the formation of laminar flow, reduce fluid pressure loss, reduce eddies, and improve the flow capacity of the one-way valve 1.

[0089] like Figure 5As shown, in this embodiment, the support member 12 of the one-way valve 1 of this application includes a support body 121 and at least two support arms 122. A support hole 120 is provided in the support body 121, and the support arms 122 are connected to the support body 121 and extend from the support body 121 towards the valve body 10. The support member 12 is designed with an intermediate support body 121 and a structure in which the support arms 122 extend from the support body 121 towards the valve body 10. This reduces the weight of the support body 121, provides support for the guide sleeve 13 and the valve core 14, and does not affect the channel size for fluid flow, thus reducing the overall impact of the support member 12 on fluid flow.

[0090] The support body 121 supports the guide sleeve 13, and the support arm 122 supports the support body 121 on the valve body 10. Two adjacent support arms 122 and the valve body 10 can form a fluid channel 15 for fluid flow. In this embodiment, there are four support arms 122, and two opposing support arms 122 are connected to the valve body 10, which can be done by welding or other methods. The other two opposing support arms 122 do not necessarily need to be connected to the valve body 10. In other embodiments, the other two opposing support arms 122 can also be connected to the valve body 10. The number of support arms 122 can be selected according to actual conditions. In this embodiment, the support body 121 is a hollow cylinder, and a support hole 120 is provided in the support body 121.

[0091] In this embodiment, see Figures 1 to 5 The transition section 132 abuts against the support body 121, and the outer diameter of the end of the transition section 132 facing the support body 121 is greater than or equal to the outer diameter of the end of the support body 121 facing the transition section 132. The abutment and outer diameter design helps to reduce the wake, reduce flow resistance, and increase the flow rate of the one-way valve.

[0092] like Figures 6 to 8 As shown, in this embodiment, the valve core 14 of the one-way valve 1 of this application includes a bottom 140 and a wall portion 141. The bottom 140 is circular in shape, and the cross-section of the wall portion 141 is annular. One end of the wall portion 141 is connected to the bottom 140, and the other end can contact the stop portion 1321. The wall portion 141 can reciprocate along the guide portion 133 of the guide sleeve 13. The overall circular cross-section of the valve core 14 can reduce flow resistance and avoid fluid noise generated when the valve core 14 rotates. The hollow design of the valve core 14 can reduce the weight of the valve core 14, which is beneficial to reducing flow resistance and increasing the flow rate of the one-way valve 1.

[0093] In this embodiment, refer to Figure 8The wall portion 141 includes a first part 1411 and a second part 1412 connected to each other. The second part 1412 is connected to the bottom 140, and its wall thickness remains constant. The cross-sectional area of ​​the second part 1412 gradually increases from the bottom 140 towards the first part 1411. The wall portion 141 of the valve core 14 is composed of two connected parts, enabling the valve core 14 to open and close the valve port 11. The constant wall thickness of the second part 1412 ensures that the second part 1412 of the valve core 14 has sufficient strength to withstand the impact force of the fluid. The gradual increase in the cross-sectional area of ​​the second part 1412 from the bottom 140 towards the first part 1411 reduces the impact force of the fluid on the valve core 14 when the valve port 11 is opened, thereby reducing flow resistance and guiding the flow of fluid, which is beneficial to improving the flow capacity of the one-way valve 1.

[0094] In this embodiment, refer to Figure 8 The inner wall 142 of the first part 1411 is cylindrical, allowing it to contact and move relative to the guide part 133. The wall thickness t of the first part 1411 gradually decreases from the second part 1412 towards the first part 1411. The first part 1411 can reciprocate along the guide part 133. The cylindrical inner wall ensures that the valve core 14 fits tightly against the guide part 133 during reciprocating motion. The wall thickness t of the first part 1411 gradually decreases from the second part 1412 towards the end of the first part 1411 away from the second part 1412, giving the outer wall 143 of the first part 1411 a shape similar to an inverted cone. This reduces flow resistance and static pressure on the outer wall of the valve core 14, helps form a teardrop-shaped flow channel, and allows the diameter of the one-way valve 1 to be closer to that of the system pipeline, resulting in the valve opening flow rate being the same as the system pipeline flow rate.

[0095] In this embodiment, refer to Figure 7 The outer wall 143 of the first part 1411 is a partially conical surface. The apex angle of the cone containing the outer wall 143 of the first part 1411 is α, then 5° < α < 10°. 5° < α < 10° can reduce the static pressure on the outer wall 143 side of the valve core 14, reduce the wake, reduce flow resistance, and increase the flow rate of the one-way valve 1. The angle α can be 6°, 7°, 8°, and 9°, or any value between 5° and 10°, such as 6.5°, 7.2°, etc., and so on.

[0096] In this embodiment, refer to Figure 7, define the plane containing the center line of the support hole 120 as the axial plane. The outer wall 143 of the second part 1412 intersects with the axial plane to form an intersection line 200. The intersection line 200 includes at least two arcs 201, 202. The radii of the arcs 201, 202 are different and are smoothly connected. The second part 1412 is smoothly connected to the first part 1411 through the arc 201 and is smoothly connected to the bottom 140 through the arc 202. In this embodiment, the two arcs 201, 202 are convex arcs. The second part 1412 of the valve core 14 is integrally in the shape of a smoothly transitioning curved surface, which is beneficial to reducing fluid resistance, can quickly guide the fluid to flow through, and improve the flow rate of the one-way valve 1.

[0097] In this embodiment, referring to Figure 7 , the intersection line 200 includes two arcs 201, 202 and a straight line 203. The straight line 203 connects the two arcs 201, 202. The radius of the arc 201 close to the first part 1411 is R1, then 1 mm < R1 < 2 mm; for example: 1.2 mm, 1.5 mm, 1.6 mm, 1.8 mm, etc. The radius of the arc 202 close to the bottom 140 is R2, then 2 mm < R2 < 3 mm. For example: 2.1 mm, 2.3 mm, 2.5 mm, 2.8 mm, etc. Such a design can make the outer surface of the second part 1412 smooth, further reduce the flow resistance, and improve the flow rate of the one-way valve 1.

[0098] In this embodiment, referring to Figure 6 and Figure 8 , the height of the transition part 132 of the guide sleeve 13 along the center line direction of the support hole 120 is H1, then 2 mm < H1 < 3 mm; for example: 2.1 mm, 2.3 mm, 2.5 mm, 2.8 mm, etc. And / or, the height of the valve core 14 along the center line direction of the support hole 120 is H2, then 12 mm < H2 < 13 mm. For example: 12.1 mm, 12.3 mm, 12.5 mm, 12.8 mm, etc. The heights of the transition part 132 and the valve core 14 can greatly improve the Cv value of the flow capacity of the one-way valve 1.

[0099] In this embodiment, referring to Figure 6 and Figure 7, define the diameter of the outer wall 143 at one end of the valve core 14 close to the transition part 132 as D1, and the diameter of the end of the transition part 132 close to the valve core 14 as D2, then D1 = D2. 7.6mm < D1 < 7.8mm. For example: D1 = D2 = 7.65mm, D1 = D2 = 7.7mm, D1 = D2 = 7.75mm, etc. D1 = D2 can make the valve core 14 and the transition part 132 closely combined, and there will be no blockage when the fluid flows through, and the flow channel of the fluid is smooth and continuous. It is beneficial to reduce the flow resistance and increase the flow rate of the check valve 1. 7.6mm < D1 = D2 < 7.8mm can ensure both the strength of the valve core 14 and the space for the fluid to pass through in the valve cavity 101 of the check valve 1.

[0100] In this embodiment, refer to Figure 6 , the outer shape of the transition part 132 is a frustum of a cone. Define the plane containing the center line of the support hole 120 as the axial plane, and the included angle between the two generatrixes of the frustum-shaped outer wall of the transition part 132 on the axial plane as β, then 40° < β < 50°. The included angle 40° < β < 50° between the two generatrixes of the transition part 132 on the axial plane can further improve the smoothness of the fluid flowing through the transition part 132 after passing through the outer wall 143 of the valve core 14, reduce the eddy current, be beneficial to the formation of fluid laminar flow, and thus reduce the flow resistance and increase the flow rate.

[0101] In this embodiment, the weight of the valve core 14 is less than or equal to 1.5 grams. The lightweight design of the valve core 14 can improve the valve opening ability. The fluid only needs to overcome the gravity of the valve core 14 to open the check valve 1. It can also reduce the material used for the check valve 1 and lower the cost. The material of the check valve 1 is stainless steel. The check valve 1 is made of all-stainless-steel material, with high corrosion resistance and long service life.

[0102] Figure 9 Fig. shows the second embodiment of the check valve 1 of the present application. Compared with the check valve 1 of the first embodiment, the check valve 1 of this second embodiment has substantially the same structure in the basic structure. Therefore, in the following description of the check valve 1 of the second embodiment, the structures already described in the first embodiment will not be repeated. In addition, the same reference signs are used for the structures that are the same as those of the check valve 1 described in the first embodiment. Therefore, in the following description of this embodiment, the differences from the check valve 1 of the first embodiment will be mainly described.

[0103] As Figure 9 shown, a limiting part 102 is provided on the inner wall of the valve body 10, and the support member 12 is limited by the limiting part 102. The setting of the limiting part 102 facilitates the positioning and limiting of the support member 12.

[0104] Figure 10 and Figure 11This paper illustrates a third embodiment of the check valve 1 of this application, which has a substantially similar structure in its basic construction to the check valve 1 of the first embodiment. Therefore, in the following description of the check valve 1 of the third embodiment, the structures already described in the first embodiment will not be repeated. Furthermore, structures identical to those described in the first embodiment will be labeled with the same reference numerals. Therefore, in the following description of this embodiment, the differences from the check valve 1 of the first embodiment will be primarily explained.

[0105] like Figure 10 and Figure 11 As shown, the support 121 is a hollow frustum, and the diameter of the hollow frustum gradually decreases from the transition portion 132 away from the transition portion 132. The hollow support 121, which is similar to an inverted cone, can connect with the transition portion 132 of the guide sleeve 13, extend the teardrop-shaped flow channel, further reduce the fluid flow resistance, and improve the flow capacity of the one-way valve 1.

[0106] Figure 12 This paper presents a fourth embodiment of the check valve 1 of this application, which has a substantially the same basic structure as the check valve 1 of the first embodiment. Therefore, in the following description of the check valve 1 of the fourth embodiment, the structures already described in the first embodiment will not be repeated. Furthermore, structures identical to those described in the first embodiment will be labeled with the same reference numerals. Therefore, in the following description of this embodiment, the differences from the check valve 1 of the first embodiment will be primarily described.

[0107] like Figure 12 As shown, the wall thickness T of the valve body 10 located between the support 12 and the valve port 11 is smaller than the wall thickness T at both ends of the valve body 10. This increases the space available for the fluid to pass through the check valve 1 after the valve port 11 is opened, which helps to mitigate fluid impact, reduce turbulence, lower the static pressure of the fluid, and increase the flow rate.

[0108] The one-way valve 1 of this application also has a fifth embodiment, wherein the one-way valve 1 of the fifth embodiment has a substantially the same structure in its basic construction as the one-way valve 1 of the first embodiment. Structures identical to those described in the first embodiment are marked with the same reference numerals. The difference between the fifth embodiment and the first embodiment is that the support body 121 of the support member 12 is a hollow frustum, and the diameter of the hollow frustum gradually decreases from the transition portion 132 toward the direction away from the transition portion 132. A limiting portion 102 is provided on the inner wall of the valve body 10, and the support member 12 is limited to the limiting portion 102.

[0109] The one-way valve 1 of this application also has a sixth embodiment, wherein the one-way valve 1 of the sixth embodiment has a substantially the same structure in its basic construction as the one-way valve 1 of the first embodiment. Structures identical to those described in the first embodiment are marked with the same reference numerals. The difference between the sixth embodiment and the first embodiment is that a limiting portion 102 is provided on the inner wall of the valve body 10, and the support member 12 is limited to the limiting portion 102. The wall thickness T of the valve body 10 located between the support member 12 and the valve port 11 is smaller than the wall thickness T at both ends of the valve body 10.

[0110] The one-way valve 1 of this application also has a seventh embodiment, wherein the one-way valve 1 of the seventh embodiment has a substantially the same structure in its basic construction as the one-way valve 1 of the first embodiment. Structures identical to those described in the first embodiment are labeled with the same reference numerals. The difference between the seventh embodiment and the first embodiment is that the support body 121 of the support member 12 is a hollow frustum, and the diameter of the hollow frustum gradually decreases from the transition portion 132 in the direction away from the transition portion 132. The wall thickness T of the valve body 10 located between the support member 12 and the valve port 11 is smaller than the wall thickness T at both ends of the valve body 10.

[0111] The one-way valve 1 of this application also has an eighth embodiment, wherein the one-way valve 1 of the eighth embodiment has a substantially the same structure in its basic construction as the one-way valve 1 of the first embodiment. Structures identical to those described in the first embodiment are marked with the same reference numerals. The difference between the eighth embodiment and the first embodiment is that a limiting portion 102 is provided on the inner wall of the valve body 10, and the support member 12 is limited to the limiting portion 102. The support body 121 of the support member 12 is a hollow frustum, and the diameter of the hollow frustum gradually decreases from the transition portion 132 toward the direction away from the transition portion 132. The wall thickness T of the valve body 10 located between the support member 12 and the valve port 11 is smaller than the wall thickness T at both ends of the valve body 10.

[0112] The above is a detailed description of several exemplary embodiments of the check valve 1 proposed in this application. The installation and operation process of the check valve 1 proposed in this application will be described by way of example below.

[0113] Combined with appendix Figures 1 to 12 The installation process of the one-way valve 1 proposed in this application is as follows:

[0114] First, install the valve port 11 into the valve body 10 and fix it in place, which can be done by welding. Then, press-fit the mounting part 131 of the guide sleeve 13 and the support hole 120 of the support body 121 together (which can be done by welding). After fitting the valve core 14 onto the guide part 133 of the guide sleeve 13, install the valve core 14, the guide sleeve 13, and the support body 121 into the valve body 10 as a whole. Finally, fix the support body 121 to the valve body 10 by welding.

[0115] The above describes the installation process of check valve 1. The following describes the operation of check valve 1:

[0116] When fluid flow is not required, the check valve 1 is closed due to the gravity of the valve core 14 (see [reference]). Figure 1 When fluid is required to pass through, the fluid impacts the valve core 14 from the valve port 11. Due to fluid pressure, when the force of the fluid impacting the valve core 14 can overcome the weight of the valve core 14, the valve core 14 will disengage from the valve port 11, the valve port 11 will open, and the fluid will flow through. The continuous flow of fluid keeps the valve port 11 open. After flowing through, the fluid flows into the inner cavity of the valve core 14 through the first through hole 1310, the second through hole 1320, and the third through hole 1330 of the guide sleeve 13, generating pressure on the bottom 140 of the valve core 14. Since the pressure of the fluid in the inner cavity of the valve core 14 is much less than the pressure of the fluid at the valve port on the bottom 140 of the valve core 14, the valve core 14 will not descend, and the valve port 11 remains open (see [reference]). Figure 2 After the fluid flows through, the valve core 14 of the one-way valve 1 will automatically descend and close the valve port 11 due to gravity.

[0117] Through the installation and operation process of the one-way valve 1 of this application described above, it can be concluded that the one-way valve 1 of this application includes a valve body 10, a valve port 11, a support member 12, a guide sleeve 13, and a valve core 14. The support member 12 supports the guide sleeve 13 and the valve core 14 on the valve body 10. There is a flow channel between the support member 12 and the valve body 10 for fluid to pass through. The valve core 14 can reciprocate along the guide sleeve 13 to open or close the valve port 11, realizing unidirectional flow of fluid. The guide sleeve 13 includes a mounting part 131 and a transition part 132. The mounting part 131 is installed in the support hole 120, and the transition part 132 is connected to the mounting part 131. The cross-sectional area of ​​the transition part 132 gradually decreases from the valve port 11 to the support member 12. The transition section 132 of the guide sleeve 13 has a cross-sectional area that gradually decreases from the valve port 11 to the support member 12. This design significantly reduces the air pressure resistance when fluid flows through the check valve 1, promoting laminar flow and reducing eddies at the fluid tail, thereby reducing pressure loss and eddies. Simultaneously, it lowers the static pressure of the fluid flowing through the valve cavity 101 between the valve core 14 and the valve body 10, further reducing the flow resistance when fluid passes through the check valve 1, thus increasing the valve opening flow rate.

[0118] The above is a detailed description of the implementation method and installation and use process of the check valve 1 proposed in this application. The flow test of the check valve 1 proposed in this application will be described below.

[0119] Table 1 below shows the data parameters such as the valve port 11 size and flow capacity of the one-way valve 1 proposed in this application.

[0120] Table 1. Dimensional parameters and flow capacity data of the one-way valve of this application.

[0121]

[0122]

[0123] The valve bodies of the check valves in Table 1 are all 12mm in diameter, and the valve orifice diameter is 8mm in diameter. From Table 1, it can be seen that the Cv value, representing the flow capacity, of the check valve 1 of this application is above 2.3 when the valve orifice diameter 11 is 8mm and the valve body diameter is 12mm. Furthermore, the outer diameter of the guide sleeve 13... When the inverted cone angle β of the guide sleeve 13 is 45°, the height H1 of the transition part 132 of the guide sleeve 13 is 2.5mm, the inverted cone angle α of the valve core 14 is 7.5°, and the height H2 of the valve core 14 is 12.5mm, the Cv value is the highest, which is 2.53.

[0124] Table 2 below shows the valve body diameter and flow capacity of a standard gravity-type check valve.

[0125] Table 2. Data on valve body diameter and flow capacity of standard gravity-type check valves.

[0126]

[0127]

[0128] According to Table 2, for the gravity check valve, using serial number 3, with a valve body diameter of 12mm and a valve port diameter of approximately 8mm, the Cv value representing the flow capacity of this gravity check valve is 0.65.

[0129] Table 3 below shows the valve port diameter and flow capacity of the piston-type check valve.

[0130] Table 3. Data on valve orifice diameter and flow capacity of piston-type check valves.

[0131] Serial Number Valve port diameter (mm) Cv value 1 6.3 0.65 2 9.6 1.38 3 12.7 2.39 4 16.1 4.20 5 19.3 6.42 6 22.3 9.92 7 28 22.17 8 35 33.84

[0132] When the valve body diameter of a piston-type check valve is 12mm, its maximum valve orifice diameter can only be 9.6mm. According to Table 3, for piston-type check valve 1, using serial number 2 and valve orifice diameter 11 of 9.6mm, the valve body diameter is greater than 12mm, and the Cv value representing the flow capacity of piston-type check valve 1 is 1.38. Table 4 below shows the test data for the dimensional parameters and flow capacity of check valves without a transition section:

[0133] Table 4. Dimensional parameters and flow capacity of one-way valves without transition sections.

[0134]

[0135] Table 4 shows that the valve body diameter of the check valve without a transition section is 12 mm, and the valve port diameter is 8 mm. The check valve 1 of this application is a gravity-type check valve. As shown in Tables 1 to 4 above, the valve port diameter 11 of the check valve 1 of this application is 8 mm, the valve body diameter is 12 mm, and the flow capacity Cv value is greater than 2.3. The corresponding standard gravity check valve of the same size has a Cv value of 0.65, a piston-type check valve has a Cv value of 1.38, while the check valve without a transition section has a Cv value of 2.13. The flow capacity of the check valve 1 of this application is far greater than that of the standard gravity check valve, and also greater than that of the piston-type check valve; further, it is greater than that of the check valve without a transition section.

[0136] In summary, the one-way valve proposed in this application includes a valve body, a valve port, a support member, a guide sleeve, and a valve core. The support member supports the guide sleeve and the valve core within the valve body, and a flow channel for fluid passage exists between the support member and the valve body. The valve core can reciprocate along the guide sleeve to open or close the valve port, achieving one-way fluid flow. The guide sleeve includes a mounting section and a transition section. The mounting section is mounted on the valve body, and the transition section is connected to the mounting section. Defining the surface perpendicular to the centerline of the valve body as the cross-section, the cross-sectional area of ​​the transition section gradually decreases from the valve port towards the support member. The design of the transition section of the guide sleeve, with its gradually decreasing cross-sectional area from the valve port towards the support member, significantly reduces the pressure resistance of the fluid flowing through the one-way valve, promoting laminar flow, reducing eddies at the fluid tail, and thus reducing pressure loss and eddies. Simultaneously, it lowers the static pressure of the fluid flowing through the valve cavity between the valve core and the valve body, further reducing the flow resistance of the fluid passing through the one-way valve, thereby increasing the opening flow rate.

[0137] It is understood that the various embodiments / implementations provided in this application can be combined with each other without creating contradictions, and will not be described one by one here.

[0138] In this exemplary embodiment, the check valve proposed in this application is illustrated using a gravity-type check valve as an example. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the relevant designs of this application to other types of check valves; these changes are still within the scope of the principle of the check valve proposed in this application.

[0139] It should be noted that the check valves shown in the accompanying drawings and described in this specification are merely a few examples among many check valves capable of employing the principles of this application. It should be clearly understood that the principles of this application are by no means limited to any detail or component of the check valves shown in the accompanying drawings or described in this specification.

[0140] The exemplary embodiments of the check valve proposed in this application have been described and / or illustrated in detail above. However, the embodiments of this application are not limited to the specific embodiments described herein; rather, components and / or steps of each embodiment may be used independently and separately from other components and / or steps described herein. Each component and / or step of one embodiment may also be used in combination with other components and / or steps of other embodiments. In describing the elements / components / etc. described and / or illustrated herein, the terms "a," "an," and "the above" are used to indicate the presence of one or more elements / components / etc.

[0141] The embodiments of this application are not limited to the specific embodiments described herein. Rather, components of each embodiment can be used independently and separately from other components described herein. Each component of one embodiment can also be used in combination with other components of other embodiments. In the description of this specification, the terms "one embodiment," "some embodiments," "other embodiments," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the application embodiments. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0142] In the embodiments, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments according to the specific circumstances.

[0143] Although the one-way valve proposed in this application has been described according to different specific embodiments, those skilled in the art will recognize that modifications can be made to the implementation of this application within the spirit and scope of the claims.

Claims

1. A one-way valve, characterized in that, Comprising: A valve body with a valve cavity inside; A valve port provided in the valve cavity and fixed to the valve body; A support member provided in the valve cavity and fixed to the valve body, with a fluid passage between the support member and the valve body; A guide sleeve provided in the valve cavity and located between the valve port and the support member. The guide sleeve includes a mounting portion and a transition portion. The mounting portion is fixed to the support member, and the transition portion is connected to the mounting portion; A valve core provided in the guide sleeve and capable of reciprocating in the valve cavity to open or close the valve port; Defining the plane perpendicular to the center line of the valve body as the cross-section, the cross-sectional area of the transition portion gradually decreases from the valve port towards the support member.

2. The one-way valve as described in claim 1, characterized in that, The guide sleeve further includes a guiding portion connected to the transition portion. The valve core is sleeved on the guiding portion and can reciprocate along the guiding portion.

3. The one-way valve as described in claim 2, characterized in that, The mounting portion has a first through hole, the transition portion has a second through hole, and the guiding portion has a third through hole. The first through hole, the second through hole, and the third through hole are connected. The first through hole is connected to the valve cavity, and the third through hole is connected to the inner cavity of the valve core.

4. The one-way valve as described in claim 2, characterized in that, One end of the guiding portion connected to the transition portion is provided with an avoidance groove, and one end of the transition portion facing the avoidance groove is provided with a stop portion. The avoidance groove is used to avoid the valve core, and the valve core can abut against the stop portion.

5. The one-way valve as described in claim 4, characterized in that, The valve core includes a bottom portion and a wall portion. The shape of the bottom portion is circular, and the cross-section of the wall portion is a ring. One end of the wall portion is connected to the bottom portion, and the other end can contact the stop portion. The wall portion can reciprocate along the guiding portion.

6. The one-way valve as described in claim 5, characterized in that, The wall portion includes a first part and a second part connected to each other. The second part is connected to the bottom portion, and the cross-sectional area of the second part gradually increases from the bottom portion towards the first part. The first part can reciprocate along the guiding portion.

7. The one-way valve as described in claim 6, characterized in that, The inner wall of the first part is a cylindrical surface that can contact and move relative to the guiding portion. The wall thickness of the first part gradually decreases in the direction from the second part towards the first part.

8. The one-way valve as described in claim 7, characterized in that, The outer wall of the first part is a partial conical surface. The apex angle of the cone where the outer wall of the first part is located is α, and 5° < α < 10°.

9. The one-way valve as described in claim 6, characterized in that, Defining the plane containing the center line of the valve body as the axial plane, the outer wall of the second part intersects with the axial plane to form an intersection line. The intersection line includes at least two arcs, and the second part is smoothly connected to the first part and the bottom portion respectively through the two arcs.

10. The one-way valve according to any one of claims 1-9, characterized in that, The height of the transition portion along the center line direction of the valve body is H1, and 2 mm < H1 < 3 mm; and / or, the height of the valve core along the center line direction of the valve body is H2, and 12 mm < H2 < 13 mm.

11. The one-way valve according to any one of claims 1-9, characterized in that, Defining the diameter of the outer wall of the end of the valve core close to the transition portion as D1, and the diameter of the end of the transition portion close to the valve core as D2, then D1 = D2.

12. The one-way valve as claimed in claim 11, characterized in that, 7.6 mm < D1 < 7.8 mm.

13. The one-way valve according to any one of claims 1-9, characterized in that, Define the plane containing the centerline of the valve body as the axial plane, the shape of the transition part as a frustum, and the included angle between the two generatrices of the outer wall of the transition part on the axial plane as β, then 40°<β<50°.

14. The one-way valve as claimed in claim 1, characterized in that, The support includes a support body and at least two support arms. The support body is provided with a support hole, the mounting part is fixed in the support hole, and the support arms are connected to the support body and extend from the support body to the valve body.

15. The one-way valve as described in claim 14, characterized in that, The transition portion abuts against the support body, and the outer diameter of the end of the transition portion facing the support body is greater than or equal to the outer diameter of the end of the support body facing the transition portion.

16. The one-way valve as claimed in claim 14, characterized in that, The support is a hollow frustum, the diameter of which gradually decreases from the transition portion toward the direction away from the transition portion; or, the support is a hollow cylinder.

17. The check valve according to any one of claims 1-9, 12, 14-16, characterized in that, The inner wall of the valve body is provided with a limiting part, and the support member is limited to the limiting part.

18. The check valve according to any one of claims 1-9, 12, 14-16, characterized in that, The wall thickness of the valve body located between the support and the valve port is less than the wall thickness at both ends of the valve body.

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