Check valve

Abstract

The utility model relates to the technical field of valve devices, in particular to a check valve. The check valve comprises a plurality of connector portions and a plurality of connectors correspondingly matched with the connector portions, at least one connector is a detachable connector, a one-way valve part is arranged at the joint of the detachable connector and the connector portion, and the one-way valve part can be detached or installed through the connector portion and a connecting installation opening of the detachable connector. According to the check valve, the one-way valve piece is arranged between the connector portion and the detachable connector, the one-way valve piece can be conveniently detached or installed through the connector portion and a connecting installation opening of the detachable connector, and by setting the installation direction of the one-way valve piece, a plurality of liquid inlet connectors can be arranged, so that the one-way valve piece can be conveniently detached or installed. When the liquid inlet pressures of the multiple liquid inlet connectors are consistent, liquid can be supplied at the same time.

Description

Technical Field

[0001] This utility model relates to the field of valve device technology, specifically to a check valve. Background Technology

[0002] A check valve, also known as a one-way valve or isolation valve, is a type of valve used in pipelines. Its function is to allow the medium to flow in only one direction and prevent flow in the opposite direction.

[0003] Existing check valves have complex internal valve structures, require large installation space, are cumbersome to install, pose a risk of liquid leakage, are costly, and inconvenient. Furthermore, the inlet and outlet of existing check valves are fixed, making reversal difficult and preventing simultaneous liquid delivery, which significantly limits their effectiveness. Utility Model Content

[0004] In view of this, the present invention provides a check valve, thereby solving or at least alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0005] To achieve the aforementioned objectives, this utility model provides a check valve, which includes multiple interface portions and multiple connectors corresponding to the interface portions. At least one connector is a detachable connector, and a one-way valve element is provided at the connection between the detachable connector and the interface portion.

[0006] The one-way valve can be disassembled or installed via the interface and the detachable connector mounting port.

[0007] In the aforementioned check valve, optionally, the one-way valve element is a one-way valve plate, and the connector presses the one-way valve plate against the pipe opening at the connection point of the interface.

[0008] In the aforementioned check valve, optionally, the one-way valve disc has a fixed portion on its outer periphery and an elastic valve flap located in the middle. The fixed portion is separate from the elastic valve flap and is connected only by a connecting portion. The elastic valve flap can fold around the connecting portion.

[0009] The connector presses the fixing part against the edge of the pipe opening of the interface. The outer diameter of the elastic valve disc is larger than the inner diameter of the pipe opening of the connector and smaller than the inner diameter of the pipe opening of the interface. The flange of the one-way valve plate is installed facing the pipe opening of the connector or facing the pipe opening of the interface.

[0010] In the aforementioned check valve, optionally, the one-way valve disc has a fixed portion on the outer periphery and an elastic valve disc in the middle. The fixed portion is separate from the elastic valve disc and is connected only through a connecting portion. Furthermore, a retaining edge is provided at the inner edge of the fixed portion. The retaining edge can prevent the elastic valve disc from folding towards it, so that the elastic valve disc only folds away from the retaining edge. The outer diameter of the elastic valve disc is smaller than the inner diameter of the pipe opening of the connector and the pipe opening of the interface portion.

[0011] In the aforementioned check valve, optionally, the resilient valve disc is made of Teflon.

[0012] In the aforementioned check valve, optionally, a valve mounting space is provided at the connection between the connector and the interface, and the one-way valve component is provided within the valve mounting space.

[0013] In the aforementioned check valve, optionally, the one-way valve element is a valve core, which has a baffle and a plurality of support legs disposed on one side of the baffle, with a gap between two adjacent support legs.

[0014] In the aforementioned check valve, optionally, the other side of the baffle of the valve core is provided with a protrusion that can extend into the pipe of the connector.

[0015] In the aforementioned check valve, optionally, the valve mounting space is provided with a plurality of guide ribs, the interval between two adjacent guide ribs is greater than the gap between the support legs of the valve core, and the number of guide ribs is less than the number of gaps between the support legs.

[0016] Optionally, in the aforementioned check valve, the check valve is a three-way check valve, which has a first interface, a second interface, and a third interface that are connected to each other at the junction.

[0017] The first interface portion is integrally formed with its corresponding first connector, second interface portion and third interface portion, and the second connector and the third connector are both detachable connectors.

[0018] The check valve of this invention features a one-way valve component between its interface and a detachable connector. This one-way valve component can be easily disassembled or installed via the connection port of the interface and the detachable connector, and its installation direction can be easily changed, allowing for quick and easy configuration of the detachable connector as either an inlet or outlet connector. Furthermore, the check valve of this invention allows for multiple inlet connectors depending on the installation direction of the one-way valve component, enabling simultaneous liquid supply when the liquid pressure in multiple inlet connectors is consistent. Attached Figure Description

[0019] The disclosure of this utility model will become more apparent with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. (See the drawings.)

[0020] Figure 1 This is a schematic diagram of one embodiment of the check valve of this utility model.

[0021] Figure 2 for Figure 1 A schematic diagram of the interface section of an embodiment of the check valve.

[0022] Figure 3 for Figure 1 A schematic diagram of a detachable connector for an embodiment of a check valve.

[0023] Figure 4 This is an exploded view of one embodiment of the check valve of this utility model.

[0024] Figure 5 for Figure 4 A cross-sectional schematic diagram of an embodiment of a check valve.

[0025] Figure 6 for Figure 5 A partially enlarged view of part A of the check valve embodiment, showing the one-way valve component.

[0026] Figure 7 for Figure 4 A three-dimensional schematic diagram of a one-way valve component in an embodiment of a check valve.

[0027] Figure 8 This is a cross-sectional schematic diagram of another embodiment of the check valve of this utility model.

[0028] Figure 9 for Figure 8 A three-dimensional schematic diagram of a one-way valve component in an embodiment of a check valve.

[0029] Figure 10 for Figure 8 A cross-sectional schematic diagram of an embodiment of a check valve.

[0030] Figure 11 for Figure 8 A three-dimensional schematic diagram of the interior of the interface section of an embodiment of a check valve.

[0031] Reference numerals: 1-Check valve; 11-First interface; 12-Second interface; 13-Third interface; 14-Merging part; 15-Valve mounting space; 16-Internal thread; 17-Guide rib; 2-First connector; 21-Second connector; 22-Third connector; 23-Pipe part; 24-Anti-detachment hook; 25-External thread; 26-Tightening part; 3-One-way valve component; 31-Fixing part; 32-Elastic valve disc; 33-Connecting part; 34-Gap; 35-Baffle; 36-Support foot; 37-Protrusion. Detailed Implementation

[0032] Referring to the accompanying drawings and specific embodiments, the structure, composition, features, and advantages of the check valve of this utility model will be described below by way of example; however, all descriptions should not be construed as limiting the present utility model in any way.

[0033] Furthermore, for any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the various drawings, the present invention still allows for any combination or deletion of these technical features (or their equivalents) without any technical obstacle. Therefore, these further embodiments according to the present invention should also be considered within the scope of the description herein.

[0034] It should also be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship of the check valve shown in the accompanying drawings. They are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0035] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of those features.

[0036] In the description of this disclosure, "multiple" means at least two, such as two, three or more, unless otherwise expressly and specifically limited.

[0037] like Figure 1 As shown, the check valve 1 of this utility model includes multiple interface sections and a junction section 14. The multiple interface sections are connected to each other in the junction section 14, and at least one of the multiple interface sections has a liquid inlet interface and at least one liquid outlet interface. The multiple interface sections are correspondingly equipped with multiple connectors, which are used to introduce or drain liquid respectively, and at least one connector is a detachable connector.

[0038] In practical applications, the number of interfaces for check valve 1 is unlimited and can be set according to requirements. Figures 1 to 10 In the embodiments of this invention, the check valve has three interface sections, which is a three-way check valve. The following description takes the three-way check valve as an example.

[0039] The three-way check valve 1 has a first interface 11, a second interface 12 and a third interface 13, and is respectively provided with a first connector 2, a second connector 21 and a third connector 22.

[0040] The angle between the first interface part 11, the second interface part 12 and the third interface part 13 is not limited. It can be an equal angle spacing as shown in the figure or an unequal angle spacing, which can be set according to the actual situation.

[0041] like Figure 2 As shown, the first interface portion 11, the second interface portion 12, and the third interface portion 13 are integrally formed with the confluence portion 14, and the first connector 2 is integrally formed with the first interface portion 12. The second connector 21 and the third connector 22 are detachable connectors. In other embodiments, the first connector 2, the second connector 21, and the third connector 22 can all be detachable connectors, or one of the connectors can be a detachable connector.

[0042] Specifically, in combination Figure 1 and Figure 3 It can be seen that the first connector 2, the second connector 21 and the third connector 22 all have a pipe section 23 and an anti-detachment hook 24 provided on the outer surface of the pipe section 23. In use, the liquid pipe can be sleeved on the pipe section 23 of the first connector 2, the second connector 21 and the third connector 22 respectively. The anti-detachment hook 24 can prevent the liquid pipe from falling off and introduce or lead out the liquid through the pipe section 23.

[0043] Specifically, internal threads 16 are provided at the ports of the second interface portion 12 of the detachable connector, such as the second connector 21, and the third interface portion 13 of the third connector 22 (e.g., ...). Figure 2 (As shown).

[0044] Accordingly, such as Figure 3 As shown, the ends of the second connector 21 and the third connector 22 that are away from the pipe portion 23 are provided with external threads 25. The external threads 25 are adapted to the internal threads 16 of the second interface portion 12 and the third interface portion 13, so that the second connector 21 can be screwed onto the second interface portion 12 or removed from the second interface portion 12, and the third connector 22 can be screwed onto the third interface portion 13 or removed from the third interface portion 13.

[0045] In the embodiment shown in the figure, the second connector 21 and the third connector 22 are respectively installed inside the second interface portion 12 and the third interface portion 13. This installation configuration, where the connectors extend into the interface portion, can reduce the risk of liquid leakage at the connection. In other embodiments, the second interface portion 12 and the third interface portion 13 may also be installed inside the second connector 21 and the third connector 22.

[0046] In an optional embodiment, the second connector 21 and the third connector 22 can be connected to the second interface portion 12 and the third interface portion 13 respectively by means of interference fit, ultrasonic welding, or adhesive dispensing.

[0047] The second interface portion 12 and the third interface portion 13 also have a valve installation space 15 inside. The valve installation space 15 is located between the pipe opening of the interface portion and the internal thread 16, that is, the connection between the connector and the interface portion. Thus, when the connector is installed in the interface portion, the pipe opening of the connector and the pipe opening of the interface portion correspond to each other at both ends of the valve installation space 15.

[0048] The valve installation space 15 is equipped with a one-way valve component 3, which can be disassembled or installed through the connection port (internal thread port) of the interface and the detachable connector. The direction of installation of the one-way valve component 3 can control the one-way flow of liquid in or out at the interface, i.e., the interface is a liquid inlet or liquid outlet, and it is also convenient to repair or replace the one-way valve component 3 if it is damaged.

[0049] Furthermore, as shown in the figure, a tightening part 26 can be provided between the external thread 25 and the pipe part 23. The outer diameter of the tightening part 26 can be the same as the outer diameter of the corresponding interface part, and the tightening part 26 facilitates external force for tightening. Figure 3 In one embodiment, the screwing part 26 is an external hexagon, which allows for easy tightening.

[0050] Figures 4 to 7 This is one embodiment of the check valve of this utility model.

[0051] exist Figures 4 to 7 In this embodiment, the one-way valve component 3 is a one-way valve plate. The connection method of the one-way valve component 3 at the second interface portion 12 is the same as that of the one-way valve component 3 at the third interface portion 13. The following description takes the connection between the third connector 22 and the one-way valve component 3 at the third interface portion 13 as an example.

[0052] from Figure 7It can be clearly seen that the one-way valve plate of the one-way valve component 3 has a fixed portion 31 on the outer periphery and an elastic valve disc 32 located in the middle. The inner edge of the fixed portion 31 is disconnected from the elastic valve disc 32 and has a gap 34. The elastic valve disc 32 is connected to the fixed portion 31 only through a connecting portion 33, that is, the elastic valve disc 32 can be folded around the connecting portion 33. Optionally, the elastic valve disc 32 can be made of an elastic material such as Teflon.

[0053] Combination Figure 6 It can be seen that both the third connector 22 and the third interface 13 have internal pipes. The inner diameter of the pipe in the third connector 22 is smaller than the inner diameter of the pipe in the third interface 13. The outer diameter of the elastic valve disc 32 is larger than the diameter of the pipe opening in the third connector 22, but smaller than the diameter of the pipe opening in the third interface 13. Figure 5 It can be seen that the one-way valve component 3 is located in the valve mounting space 15 at the third interface portion 13. Specifically, the third connector 22 presses the fixing part 31 of the one-way valve plate against the edge of the pipe of the third interface portion 13 at the connection with the third interface portion 13.

[0054] When liquid flows from the third connector 22 to the third interface 13, the elastic valve 32 folds axially at the connection 33, opening the entire passage for liquid flow. When liquid flows from the third interface 13 to the third connector 22, because the diameter of the elastic valve 32 is larger than the inner diameter of the third connector 22, the elastic valve 32 covers and presses against the opening of the third connector 22, breaking the passage and preventing liquid flow. This achieves the unidirectional flow function of liquid from the third connector 22 to the third interface 13, meaning the third connector 22 is a unidirectional liquid inlet connector.

[0055] In other embodiments, a retaining edge (not shown in the figure) may be provided at the inner edge of the fixing part 31. The retaining edge can prevent the elastic valve disc 32 from folding in that direction, so that the elastic valve disc 32 can only fold away from the retaining edge. In this embodiment, the outer diameter of the elastic valve disc 32 may be smaller than the diameter of the pipe opening of the third connector 22 and the diameter of the pipe opening of the third interface part 13.

[0056] When the flange of the one-way valve plate is located on the side close to the third connector 22, the elastic valve disc 32 can only be folded towards the pipeline direction of the third interface 13, thereby realizing the one-way flow function of liquid from the third connector 22 to the third interface 13, that is, the third connector 22 is a one-way liquid inlet connector.

[0057] When the flange of the one-way valve plate is located on the side close to the third interface 13, the elastic valve disc 32 can open towards the pipeline direction of the third connector 22, thereby realizing the one-way flow function of liquid from the third interface 13 to the third connector 22, that is, the third connector 22 is a one-way liquid outlet connector.

[0058] Figures 8 to 11This is another embodiment of the check valve of this utility model.

[0059] Figure 8 Example of a check valve and Figure 4 The external structure of the check valve embodiments is the same, and will not be described again here. Figure 8 The difference in the embodiment of the check valve is that the valve installation space 15 of the check valve is larger, and the one-way valve element 3 provided in the valve installation space 15 is a valve core.

[0060] Specifically, such as Figure 9 As shown, the valve core includes a baffle 35 and multiple support legs 36 protruding from one side of the baffle 35. The multiple support legs 36 are spaced apart, that is, there is a gap between two adjacent support legs 36. The multiple support legs 36 can be arranged as follows: Figure 9 It can be disposed along the edge of the baffle 35, or it can be evenly distributed across the entire surface of the baffle 35. Optionally, such as Figure 8 As shown, a protrusion 37 is provided on the other side of the valve core baffle 35.

[0061] Combination Figure 8 As shown, the valve core in the valve mounting space 15 of the second interface section 12 and the valve core in the valve mounting space 15 of the third interface section 13 are installed and connected in the same way. The following description will take the valve core installation method in the valve mounting space 15 of the third interface section 13 as an example.

[0062] The outer diameter of the valve core baffle 35 is larger than the inner diameter of the pipe of the third connector 22 and the third interface 13. For example... Figure 8 As shown, the baffle 35 of the valve core in the valve installation space 15 is set toward the pipe opening of the third connector 22, so that the protrusion 37 is also set toward the pipe opening of the third connector 22, and its support leg 36 is set toward the pipe of the third interface 13. The support leg 36 can be supported at the pipe opening of the third interface 13.

[0063] The valve core can move between the pipe opening of the third interface section 13 and the pipe opening of the third connector 22 within the installation space 15. Specifically, when liquid flows from the third connector 22 to the third interface section 13, the valve core is hydraulically pushed to the pipe opening of the third interface section 13, and the liquid passes through the gap of the valve core's support leg 36, thus connecting the passage.

[0064] When the liquid flows from the third interface 13 to the third connector 22, the valve core is hydraulically pushed to the pipe opening of the third connector 22, and its baffle 35 abuts against the pipe opening of the third connector 22. The protrusion 37 on the baffle 35 extends into the pipe of the third connector 22. Under the impact of the liquid, the protrusion 37 is restricted to move within the pipe wall range, thereby limiting the range of movement of the valve core.

[0065] Furthermore, since the diameter of the baffle 35 is larger than the inner diameter of the pipe opening of the third connector 22, the baffle 35 blocks the pipe of the third connector 22, thus disconnecting the passage and realizing the unidirectional flow function of liquid from the third interface 13 to the third connector 22. The third connector 22 is a unidirectional outlet connector.

[0066] In other embodiments, the valve core can also be installed in reverse, with the baffle 35 facing the pipe opening of the third interface portion 13, and the protrusion 37 also facing the pipe opening of the third interface portion 13. Furthermore, its support leg 36 faces the pipe of the third connector 22, and the support leg 36 can be supported at the pipe opening of the third connector 22. Similar to the aforementioned principle, this valve core allows liquid to flow from the third connector 22 to the third interface portion 13, where the third connector 22 is a one-way inlet connector.

[0067] In summary, by moving the valve core within the valve installation space 15 between the interface or joint, the joint can be made to conduct in one direction, thereby achieving the function of liquid check.

[0068] Furthermore, such as Figure 10 and Figure 11 As shown, the inner wall of the third interface portion 13 is provided with multiple guide ribs 17, and the guide ribs 17 protrude from the valve installation space 15. When the valve core is installed, the guide ribs 17 are located outside the gap between the support legs 36, and the width of the guide ribs 17 is greater than the gap between the support legs 36 of the valve core, so as to prevent the guide ribs 17 from getting stuck in the gap between the support legs 36 of the valve core, and the guide ribs 17 will not excessively reduce the cross-sectional area of ​​the interface portion pipe.

[0069] The guide rib 17 can limit the position of the valve core from the outer periphery and play a guiding role when the valve core moves in the valve installation space, so that the valve core can more accurately block or unclog the pipe at the interface.

[0070] In an alternative embodiment, the one-way valve 3 may also be other types of valves, such as, but not limited to, a duckbill valve.

[0071] In summary, the one-way valve 3 provided between the interface and the detachable connector of the check valve of this utility model can open or close the pipeline of the interface or connector under liquid flow pressure without additional power such as electricity or manual switching, so as to prevent backflow. It can be conveniently and reliably applied to infusion equipment with backflow requirements.

[0072] By setting the installation direction of the one-way valve component 3, the check valve can be conveniently and quickly configured with a detachable connector as an inlet or outlet connector according to actual needs.

[0073] As in the aforementioned embodiment of the three-way check valve, two detachable connectors can be provided—the second connector 21 and the third connector 22 are both inlet connectors, and the first connector 2 is an outlet connector. When the inlet liquid pressure in the two inlet connectors is the same, simultaneous liquid supply can be achieved.

[0074] The check valve of this invention has a simple structure, is easier to install, and is low in cost.

[0075] The technical scope of this utility model is not limited to the contents of the above description. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the scope of this utility model.

Claims

1. A check valve characterized by, The check valve (1) comprises a plurality of interface parts and a plurality of joints corresponding to the interface parts, at least one of the joints is a detachable joint, and a one-way valve element (3) is arranged at the connection position of the detachable joint and the interface part, The one-way valve element (3) can be detached or installed through the connection installation port of the interface part and the detachable joint.

2. The check valve of claim 1, wherein The one-way valve element (3) is a one-way valve plate, and the joint presses the one-way valve plate to the pipeline port at the connection position of the interface part.

3. The check valve of claim 2, wherein The one-way valve plate has a fixed part (31) at the outer periphery and an elastic valve clack (32) arranged at the middle part, the fixed part (31) is separated from the elastic valve clack (32) and is connected only through a connecting part (33), the elastic valve clack (32) can be folded around the connecting part (33), The joint presses the fixed part (31) to the edge of the pipeline port of the interface part, and the outer diameter of the elastic valve clack (32) is greater than the inner diameter of the pipeline port of the joint and is less than the inner diameter of the pipeline port of the interface part.

4. The check valve of claim 2, wherein The one-way valve plate has a fixed part (31) at the outer periphery and an elastic valve clack (32) arranged at the middle part, the fixed part (31) is separated from the elastic valve clack (32) and is connected only through a connecting part (33), and a stop edge is further arranged at the inner edge of the fixed part (31), the stop edge can block the folding of the elastic valve clack (32) in the direction close to it, so that the elastic valve clack (32) is folded only in the direction away from the stop edge, and the outer diameter of the elastic valve clack (32) is less than the inner diameter of the pipeline port of the joint and the pipeline port of the interface part, The stop edge of the one-way valve plate is installed towards the pipeline port of the joint or the pipeline port of the interface part.

5. The check valve of claim 2 wherein, The one-way valve plate is made of Teflon.

6. The check valve of claim 1, wherein The connection position of the joint and the interface part is provided with a valve installation space (15), and the one-way valve element (3) is arranged in the valve installation space (15).

7. The check valve of claim 6, wherein The one-way valve element (3) is a valve core, the valve core has a baffle (35) and a plurality of supporting legs (36) arranged on one side of the baffle (35), there is a gap between two adjacent supporting legs (36), and the baffle (35) of the valve core is installed towards the pipeline port of the joint or the pipeline port of the interface part.

8. The check valve of claim 7, wherein The other side of the baffle (35) of the valve core is provided with a convex part (37), and the convex part (37) can extend into the inside of the pipeline of the joint (22).

9. The check valve of claim 7 wherein, The valve installation space (15) is provided with a plurality of guide ribs (17), the interval distance between two adjacent guide ribs (17) is greater than the gap between the supporting legs (36) of the valve core, and the number of the guide ribs (17) is less than the number of the gaps between the supporting legs (36).

10. The check valve of claim 1 wherein, The check valve (1) is a three-way check valve, the three-way check valve (1) has a first interface part (11), a second interface part (12) and a third interface part (13) and is communicated at a convergence part (14), and a second joint (21) and a third joint (22) are arranged corresponding to the second interface part (12) and the third interface part (13), respectively, The first interface part (11) is integrally formed with a first joint (2) and a second interface part (12) and a third interface part (13) corresponding thereto, the second joint (21) and the third joint (22) are detachable joints.

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