One-way valve

Abstract

A one-way valve (1), comprising a valve body (10), a valve port (11), a support member (12), a guide sleeve (13), and a valve core (14). A valve cavity (101) is provided inside the valve body (10). The valve port (11) is provided in the valve cavity (101) and is fixed to the valve body (10). The support member (12) is provided in the valve cavity (101) and is fixed to the valve body (10). A fluid channel (15) is provided between the support member (12) and the valve body (10). The guide sleeve (13) is provided in the valve cavity (101) and is located between the valve port (11) and the support member (12). The guide sleeve (13) comprises a mounting portion (131) and a transition portion (132). The mounting portion (131) is fixed to the support member (12), and the transition portion (132) is connected to the mounting portion (131). The valve core (14) is provided on the guide sleeve (13), and can perform reciprocating motion in the valve cavity (101) to open or close the valve port (11). The plane perpendicular to the center line of the valve body (10) is defined as a cross section, and the area of the cross section of the transition portion (132) gradually decreases from the valve port (11) to the support member (12). The transition portion of the guide sleeve is designed with a structure in which the area of the cross section gradually decreases from the valve port to the support member, which can greatly reduce the pneumatic flow resistance of a fluid when flowing through the one-way valve, which is conducive to the formation of laminar flow of the fluid, and reduces eddy flows at the tail of the fluid, thereby lowering pressure loss and reducing eddy flows. In addition, the static pressure of the fluid between the valve core and the valve body that flows through the valve cavity can be reduced, and the flow resistance of the fluid when passing through the one-way valve is further reduced, thereby increasing the flow rate when the valve is open.

Description

one-way valve

[0001] This disclosure claims priority to Chinese patent application No. 202411535586.1, filed on October 30, 2024, entitled “One-way valve”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to a one-way valve. Background Technology

[0003] 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

[0004] The main objective of this disclosure 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.

[0005] To achieve the above objectives, the present disclosure adopts the following technical solution:

[0006] According to one aspect of this disclosure, 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.

[0007] According to one embodiment of this disclosure, 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.

[0008] According to one embodiment of this disclosure, 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.

[0009] According to one embodiment of this disclosure, 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.

[0010] According to one embodiment of this disclosure, 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.

[0011] According to one embodiment of the present disclosure, 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.

[0012] According to one embodiment of this disclosure, 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.

[0013] According to one embodiment of this disclosure, 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°.

[0014] According to one embodiment of this disclosure, a 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.

[0015] According to one embodiment of this disclosure, the height of the transition portion along the centerline of the valve body is H1, then 2mm.

[0016] According to one embodiment of this disclosure, 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.

[0017] ​According to one embodiment of this disclosure, 7.6mm <D1<7.8mm。

[0018] According to one embodiment of this disclosure, the plane containing the centerline of the valve body is defined as the axial plane, the shape of the transition portion is a frustum, and the included angle between the two generatrices of the outer wall of the transition portion on the axial plane is β, then 40°<β<50°.

[0019] According to one embodiment of this disclosure, 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.

[0020] According to one embodiment of this disclosure, 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.

[0021] According to one embodiment of this disclosure, 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.

[0022] According to one embodiment of this disclosure, the inner wall of the valve body is provided with a limiting portion, and the support member is limited to the limiting portion.

[0023] According to one embodiment of this disclosure, 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.

[0024] As can be seen from the above technical solution, the advantages and positive effects of the one-way valve proposed in this disclosure are as follows:

[0025] The one-way valve disclosed herein 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. 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, enabling unidirectional fluid flow. The guide sleeve includes a mounting portion and a transition portion. The mounting portion is mounted on the support member, and the transition portion is connected to the mounting portion. Defining the surface perpendicular to the centerline 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. The design of the transition portion 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

[0026] The above and other features and advantages of this disclosure will become more apparent from a detailed description of exemplary embodiments thereof with reference to the accompanying drawings.

[0027] Figure 1 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 disclosure.

[0028] Figure 2 is a cross-sectional view of the one-way valve in Figure 1 with the valve core open.

[0029] Figure 3 is a perspective view of the support, guide sleeve and valve core of the embodiment shown in Figure 1.

[0030] Figure 4 is a schematic diagram of the fluid flow of the check valve in Figure 1.

[0031] Figure 5 is a three-dimensional structural diagram of the support component of the one-way valve in Figure 1.

[0032] Figure 6 is a front view of the guide sleeve of the check valve in Figure 1.

[0033] Figure 7 is a front view of the valve core of the one-way valve in Figure 1.

[0034] Figure 8 is a cross-sectional view of the valve core of the one-way valve in Figure 1.

[0035] Figure 9 is a cross-sectional schematic diagram of the valve core in the open valve port state of the second embodiment of the one-way valve of this disclosure.

[0036] Figure 10 is a cross-sectional schematic diagram of the valve core in the open valve port state of the third embodiment of the one-way valve of this disclosure.

[0037] Figure 11 is a three-dimensional structural diagram of the support component of the one-way valve in Figure 10.

[0038] Figure 12 is a cross-sectional schematic diagram of the valve core in the open valve port state of the fourth embodiment of the one-way valve of this disclosure.

[0039] The reference numerals in the attached drawings are explained as follows: 1-One-way valve; 10-Valve body; 11-Valve port; 12-Support member; 13-Guide sleeve; 14-Valve core; 15-Fluid passage; 101-Valve cavity; 102-Limiting part; 120-Support hole; 121-Support body; 122-Support arm; 131-Mounting part; 132-Transition part; 133-Guide part; 140-Bottom; 141-Wall part; 142-Inner wall of valve core; 143-Outer wall of valve core; 200-Intersection line; 201, 202-Arc; 203-Straight line; 1310-First through hole; 1320-Second through hole; 1330-Third through hole; 1321-Stop part; 1331-Allowing groove; 1411-First part; 1412 - Part Two; S - Fluid Flow Direction; α - Apex Angle of the Cone on which the Outer Wall of the First Part of the Valve Core is Located; β - Angle Between the Two Generatrices of the Transition Section on the Axial Plane; H1 - Height of the Transition Section; H2 - Height of the Valve Core; t - Wall Thickness of the Valve Core; T - Wall Thickness of the Valve Body; D1 - Diameter of the Outer Wall of the Valve Core at the End Near the Transition Section; D2 - Diameter of the Transition Section at the End Near the Valve Core; R1 - Radius of the Arc Near the First Part; R2 - Radius of the Arc Near the Bottom. Detailed Implementation

[0040] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Although relative terms such as “upper” and “lower” are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples described in the accompanying drawings. It will be understood that if the device of the icon is flipped so that it is upside down, the component described as “upper” will become the component described as “lower.” Other relative terms such as “top” and “bottom” are used with similar meanings. When a structure is “upper” than another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is “directly” disposed on the other structure, or that the structure is “indirectly” disposed on the other structure through another structure.

[0041] The terms “a,” “one,” “the,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” etc. are used only as markers and are not a limitation on the number of objects.

[0042] As shown in Figures 1 to 3, the one-way valve 1 of this disclosure 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. Wherein, 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.

[0043] The one-way valve 1 disclosed herein has a guide sleeve 13 whose transition portion 132 has a cross-sectional area that gradually decreases from the valve port 11 to the support member 12. This design 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.

[0044] 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 support and positioning for the valve core 14 and guides its reciprocating movement.

[0045] 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 the air pressure in the cavity formed by the valve core 14 and the guide sleeve 13 from being too high, which would cause the valve core to slide obstructed.

[0046] 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 is used to avoid 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.

[0047] Figure 4 shows the fluid flow state when the one-way valve 1 of this disclosure is open. As can be seen from Figure 4, the fluid flows through the space between the valve core 14, the guide sleeve 13, the support 121, and the valve body 10. The fluid flows through the one-way valve 1 along the fluid flow direction S, forming a teardrop-shaped fluid flow channel. 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.

[0048] As shown in Figure 5, in this embodiment, the support member 12 of the one-way valve 1 of this disclosure includes a support body 121 and at least two support arms 122. A support hole 120 is disposed in the support body 121, and the support arms 122 are connected to the support body 121 and extend from the support body 121 toward the valve body 10. The support member 12 includes an intermediate support body 121, from which support arms 122 extend toward 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.

[0049] The support body 121 supports the guide sleeve 13. Support arms 122 support the support body 121 against the valve body 10, and 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, with two opposing support arms 122 connected to the valve body 10 by welding or other means. 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 may 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.

[0050] In this embodiment, referring to Figures 1 to 5, the transition portion 132 abuts against the support body 121, and the outer diameter of the end of the transition portion 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 portion 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.

[0051] As shown in Figures 6 to 8, in this embodiment, the valve core 14 of the one-way valve 1 of this disclosure 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.

[0052] In this embodiment, referring to FIG8, the 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 the wall thickness of the second part 1412 remains constant. The cross-sectional area of ​​the second part 1412 gradually increases from the bottom 140 to the first part 1411. The wall portion 141 of the valve core 14 is composed of two connected parts, which enables 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 to 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.

[0053] In this embodiment, referring to FIG8, the inner wall 142 of the first part 1411 is a cylindrical surface, which can 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 toward the first part 1411. The first part 1411 can reciprocate along the guide part 133. The cylindrical inner wall allows the valve core 14 to fit 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 toward the end of the first part 1411 away from the second part 1412, making the outer wall 143 of the first part 1411 of the valve core 14 present a shape similar to an inverted cone. This can reduce flow resistance, reduce static pressure on the outer wall of the valve core 14, and help form a teardrop-shaped flow channel. This allows the diameter of the one-way valve 1 to be closer to the system pipeline, and the valve opening flow rate to be the same as the system pipeline flow rate.

[0054] In this embodiment, referring to FIG7, 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, where 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.

[0055] In this embodiment, referring to FIG. 7, the plane where the center line of the support hole 120 lies is 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 at least includes an arc 201 and an arc 202. The radii of the arc 201 and the arc 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 arc 201 and the arc 202 are convex arcs, and the second part 1412 of the valve core 14 is 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 check valve 1.

[0056] In this embodiment, referring to FIG. 7, the intersection line 200 includes an arc 201, an arc 202 and a straight line 203. The straight line 203 connects the arc 201 and the arc 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 check valve 1.

[0057] In this embodiment, referring to FIGS. 6 and 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 check valve 1.

[0058] In this embodiment, referring to FIGS. 6 and 7, the diameter of the outer wall 143 at one end of the valve core 14 close to the transition part 132 is D1, and the diameter of the transition part 132 at one end close to the valve core 14 is D2, then D1 = D2. 7.6 mm < D1 < 7.8 mm. For example: D1 = D2 = 7.65 mm, D1 = D2 = 7.7 mm, D1 = D2 = 7.75 mm, 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. The fluid flow channel is smooth and continuous, which is beneficial to reducing the flow resistance and improving the flow rate of the check valve 1. 7.6 mm < D1 = D2 < 7.8 mm 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.

[0059] In this embodiment, referring to FIG6, the transition portion 132 is shaped like a frustum. The plane containing the centerline of the support hole 120 is defined as the axial plane. The angle between the two generatrices of the frustum-shaped outer wall of the transition portion 132 on the axial plane is β, where 40° < β < 50°. This angle of 40° < β < 50° between the two generatrices of the transition portion 132 on the axial plane further improves the smoothness of the fluid flow through the transition portion 132 after passing through the outer wall 143 of the valve core 14. It reduces eddies, facilitates the formation of laminar flow, and thus reduces flow resistance and increases flow rate.

[0060] In this embodiment, the valve core 14 weighs less than or equal to 1.5 grams. The lightweight design of the valve core 14 improves its opening capability. The fluid only needs to overcome the weight of the valve core 14 to open the check valve 1. This also reduces the amount of material used in the check valve 1, lowering costs.

[0061] The one-way valve 1 is made of stainless steel. The one-way valve 1 is made entirely of stainless steel, which offers high corrosion resistance and a long service life.

[0062] Figure 9 shows a second embodiment of the check valve 1 of this disclosure, 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 second 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 mainly described.

[0063] As shown in Figure 9, 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 limiting part 102 facilitates the positioning and limiting of the support member 12.

[0064] Figures 10 and 11 illustrate a third embodiment of the check valve 1 of this disclosure, 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 third embodiment, the structures already described in the first embodiment will not be repeated. Furthermore, structures identical to those described in the check valve 1 of 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.

[0065] As shown in Figures 10 and 11, 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 fluid flow resistance, and improve the flow capacity of the one-way valve 1.

[0066] Figure 12 shows a fourth embodiment of the check valve 1 of this disclosure, 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 check valve 1 of 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 mainly described.

[0067] As shown in Figure 12, 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 arrangement 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.

[0068] The one-way valve 1 disclosed herein 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.

[0069] The one-way valve 1 disclosed herein 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 confined within 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 less than the wall thickness T at both ends of the valve body 10.

[0070] The one-way valve 1 disclosed herein 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 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.

[0071] The one-way valve 1 disclosed herein 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.

[0072] The above is a detailed description of several exemplary embodiments of the check valve 1 proposed in this disclosure. The installation and operation process of the check valve 1 proposed in this disclosure will be described by way of example below.

[0073] Referring to Figures 1 to 12, the installation process of the one-way valve 1 proposed in this disclosure is as follows:

[0074] First, the valve port 11 is installed into the valve body 10 and can be fixed by welding. Then, the mounting part 131 of the guide sleeve 13 and the support hole 120 of the support body 121 are press-fitted and fixed together (by welding). After the valve core 14 is fitted onto the guide part 133 of the guide sleeve 13, the valve core 14, the guide sleeve 13 and the support body 121 are installed into the valve body 10 as a whole. Finally, the support body 121 is fixed to the valve body 10 by welding.

[0075] The above describes the installation process of check valve 1. The following describes the operation of check valve 1:

[0076] When fluid passage is not required, the one-way valve 1 is closed under the weight of the valve core 14 (see Figure 1). When fluid passage is required, the fluid impacts the valve core 14 from the valve port 11. Due to the pressure of the fluid, 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 detach 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 will flow 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 from the valve port on the bottom 140 of the valve core 14, the valve core 14 will not descend, and the valve port 11 will remain open (see 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.

[0077] Through the installation and operation process of the one-way valve 1 disclosed herein, it can be concluded that the one-way valve 1 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 fluid flow. The guide sleeve 13 includes a mounting portion 131 and a transition portion 132. The mounting portion 131 is installed in the support hole 120, and the transition portion 132 is connected to the mounting portion 131. The cross-sectional area of ​​the transition portion 132 gradually decreases from the valve port 11 towards 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.

[0078] The above is a detailed description of the implementation method and installation and use process of the check valve 1 proposed in this disclosure. The flow test of the check valve 1 proposed in this disclosure will be described below.

[0079] 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 disclosure.

[0080] Table 1. Dimensional parameters and flow capacity data of the one-way valve disclosed herein.

[0081] The valve bodies of the check valves in Table 1 all have a diameter of 12 mm and a valve port diameter of 8 mm. From Table 1, it can be seen that the Cv value, representing the flow capacity, of the check valve 1 disclosed herein is above 2.3 when the valve port diameter 11 is 8 mm and the valve body diameter is 12 mm. Furthermore, the highest Cv value, 2.53, is achieved when the outer diameter φD2 of the guide sleeve 13 is 7.7 mm, the inverted cone angle β of the guide sleeve 13 is 45°, the height H1 of the transition portion 132 of the guide sleeve 13 is 2.5 mm, the inverted cone angle α of the valve core 14 is 7.5°, and the height H2 of the valve core 14 is 12.5 mm.

[0082] Table 2 below shows the valve body diameter and flow capacity of a standard gravity-type check valve.

[0083] Table 2. Data on valve body diameter and flow capacity of standard gravity-type check valves.

[0084] 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.

[0085] Table 3 below shows the valve port diameter and flow capacity of the piston-type check valve.

[0086] Table 3. Data on valve orifice diameter and flow capacity of piston-type check valves.

[0087] When the valve body diameter of a piston-type check valve is 12mm, its maximum valve port diameter can only be 9.6mm. According to Table 3, when piston-type check valve 1 uses serial number 2 and valve port 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.

[0088] Table 4 below shows the test data for the dimensional parameters and flow capacity of a check valve without a transition section.

[0089] Table 4. Dimensional parameters and flow capacity of one-way valves without transition sections.

[0090] 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 disclosure 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 disclosure 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 disclosure 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.

[0091] In summary, the one-way valve proposed in this disclosure includes a valve body, a valve port, a support, a guide sleeve, and a valve core. The support supports the guide sleeve and valve core within the valve body, and a flow channel for fluid passage exists between the support and the valve body. The valve core can reciprocate along the guide sleeve to open or close the valve port, achieving unidirectional 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. The design of the transition section of the guide sleeve, with its gradually decreasing cross-sectional area from the valve port towards the support, 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.

[0092] It should be understood that this disclosure is not limited to the detailed structure and arrangement of the components presented in this specification. This disclosure is capable of other embodiments and can be implemented and performed in various ways. The foregoing variations and modifications fall within the scope of this disclosure. It should be understood that this disclosure, as disclosed and defined in this specification, extends to all alternative combinations of two or more individual features mentioned or apparent in the text and / or drawings. All these different combinations constitute multiple alternative aspects of this disclosure. The embodiments described in this specification illustrate the best known mode for implementing this disclosure and will enable those skilled in the art to utilize this disclosure.

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 an installation portion and a transition portion. The installation portion is fixed to the support member, and the transition portion is connected to the installation portion; A valve core provided in the guide sleeve and capable of reciprocating in the valve cavity to open or close the valve port; Wherein, the plane perpendicular to the center line of the valve body is the cross-section. From the valve port towards the support member, the cross-sectional area of the transition portion gradually decreases.

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 installation 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 and a wall portion. The shape of the bottom is circular, and the cross-sections of the wall portion are all circular rings. 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 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, and the cross-sectional area of the second part gradually increases from the bottom 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. The first part can contact and move relative to the guiding portion, and the wall thickness of the first part gradually decreases 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, The plane where the center line of the valve body is located is the axial plane. The outer wall of the second part intersects with the axial plane to form an intersection line, and the intersection line includes at least two arcs. The second part is smoothly connected to the first part and the bottom 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, The diameter of the outer wall of one end of the valve core close to the transition portion is D1, and the diameter of one end of the transition portion close to the valve core is D2, and 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, The plane containing the centerline of the valve body is an 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°.

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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