one-way valve

Abstract

The utility model discloses a check valve, include: valve seat, flow channel, flow channel set in valve seat, be provided with step in flow channel, valve core, valve core includes valve piece and the support piece of support valve piece, valve piece has elasticity, valve piece can adhere step surface to close flow channel, one side of valve piece is provided with first recess towards step surface, first recess is provided at least in the portion of valve piece and step surface contact, support piece is connected with valve seat. This check valve sets up first recess one side of valve piece towards step surface, and first recess can avoid the wrinkle of valve piece surface, thereby guaranteeing sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of one-way valve technology, specifically a one-way valve. Background Technology

[0002] In the field of medical devices, one-way valves (anti-backflow valves) are commonly used key components in intravenous infusion devices. One-way valves must ensure that backflow is prevented while avoiding the use of easily corroded materials such as metal. Currently, one-way valves used for intravenous infusions, high-pressure infusion of contrast agents, and bronchial intubation are usually spring-loaded one-way valves, which are prone to rusting and malfunction due to long storage time, or may become a source of contamination during operation, posing a risk to human health. Utility Model Content

[0003] In order to overcome the defects in the prior art, the present invention provides a one-way valve, which has a first groove on the side of the valve plate facing the stepped surface. The first groove can prevent wrinkling on the surface of the valve plate, thereby ensuring sealing performance.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a one-way valve, comprising:

[0005] Valve seat;

[0006] A flow channel is provided inside the valve seat, and a step is provided inside the flow channel;

[0007] The valve core includes a valve plate and a support member for supporting the valve plate. The valve plate is elastic and can conform to the stepped surface to close the flow channel. A first groove is provided on the side of the valve plate facing the stepped surface. The first groove is provided at least in the part of the valve plate that contacts the stepped surface. The support member is connected to the valve seat.

[0008] Furthermore, the valve seat includes:

[0009] A first valve body is provided with a first flow channel, and a second groove is provided at one end of the first valve body along the circumferential direction of the first flow channel.

[0010] The second valve body is sleeved with one end of the first valve body that has a second groove. The second valve body has a valve cavity that communicates with the first flow channel and a second flow channel that communicates with the valve cavity.

[0011] When the first valve body and the second valve body are sleeved together, the end face of the first valve body forms the stepped surface, and the first flow channel, the valve cavity and the second flow channel are combined to form the flow channel.

[0012] Through the above technical solution, the one-way valve has a first groove on the side of the valve plate facing the first valve body. The first groove can prevent wrinkles on the surface of the valve plate, thereby ensuring sealing performance. The one-way valve has a second groove on the end face of the first valve body, which is arranged along the circumferential direction of the first flow channel, thereby reducing the contact area between the valve plate and the first valve body, preventing the valve plate and the first valve body from being too tightly fitted, and thus preventing the liquid from being unable to open the valve plate.

[0013] Furthermore, the first groove is circular, with the geometric center of the valve plate as the center, and one of the first grooves is set at a preset distance.

[0014] Furthermore, when no external force is applied, the valve plate has a concave first arc surface on the side facing the first valve body;

[0015] The end face of the first valve body is provided with a boss extending axially along the first flow channel, and the boss is provided with a second arc surface that fits against the first arc surface. The sealing performance is ensured by the fit between the first arc surface and the second arc surface.

[0016] Furthermore, the inner wall of the second valve body is provided with at least three first limiting protrusions, which are distributed at intervals around the circumference of the valve plate. The first limiting protrusions are used to limit the valve plate to ensure that the center of the valve plate and the support are fixedly connected during assembly, thereby ensuring that the force on each part of the valve plate is uniform when the fluid flows.

[0017] Furthermore, a limiting component is provided within the valve cavity. This limiting component is located on the side of the valve disc facing away from the first valve body and is distributed along the edge of the valve disc. The limiting component is connected and fixed to either the first or second valve body. When the valve disc opens under the action of fluid, its edge is suspended in the air. Due to the unstable flow of the fluid, the edge of the valve disc will repeatedly strike the liquid, easily leading to valve disc fatigue or even loss of flexibility. The limiting component supports the edge of the valve disc, reducing this striking vibration.

[0018] Furthermore, the first valve body and the second valve body are clearance-fitted, and the inner wall of the second valve body is provided with at least three second limiting protrusions, which are distributed at intervals around the periphery of the first valve body. This clearance fit replaces the interference fit used in traditional technology, avoiding valve body deformation caused by thermal stress during assembly. Simultaneously, the second limiting protrusions position the first valve body, ensuring concentricity between the first and second valve bodies.

[0019] Furthermore, the first valve body is provided with a first connecting portion that protrudes radially therefrom, and the second valve body is provided with a second connecting portion at one end facing the first valve body. The first valve body and the second valve body are sealed together through the first connecting portion and the second connecting portion.

[0020] Furthermore, a flow guide is provided within the first flow channel, and the flow guide is connected to the first valve body. The flow guide serves to buffer the fluid, thereby reducing fluid wear on the valve disc and improving its service life.

[0021] Furthermore, the second valve body has an annular groove on its end face opposite to the first valve body, and the outer wall of the annular groove is threaded. The annular groove and the thread are used to connect to the outer pipe body.

[0022] Based on the above technical solution, the beneficial effects of this utility model are as follows:

[0023] 1. The one-way valve disclosed in this application has a first groove on the side of the valve plate facing the first valve body. The first groove can prevent wrinkles on the surface of the valve plate, thereby ensuring sealing performance.

[0024] 2. The one-way valve disclosed in this application has a second groove on the end face of the first valve body, which is arranged in the circumferential direction of the first flow channel, thereby reducing the contact area between the valve plate and the first valve body, preventing the valve plate and the first valve body from being too tightly fitted, thereby avoiding the liquid from being unable to open the valve plate.

[0025] To make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a cross-sectional view of the overall device of the one-way valve in this utility model embodiment;

[0028] Figure 2 This is a schematic diagram of the structure of the second valve body in an embodiment of this utility model;

[0029] Figure 3 This is a schematic diagram of the structure of the second valve body with the valve plate installed in an embodiment of this utility model;

[0030] Figure 4 This is a schematic diagram of the structure of the first valve body in an embodiment of this utility model;

[0031] Figure 5 This is a schematic diagram of the valve plate in an embodiment of this utility model.

[0032] The reference numerals in the above figures are as follows: 1. First valve body; 11. First flow channel; 12. Second groove; 13a. Boss; 13b. Boss; 14a. Second arc surface; 14b. Second arc surface; 15. First connecting part; 2. Second valve body; 21. Valve cavity; 22. Second flow channel; 23. Second limiting protrusion; 24. First limiting protrusion; 25. Second connecting part; 251. Ultrasonic welding rib; 26. Annular groove; 261. Thread; 3. Support; 31. Bracket; 32. Ball; 4. Valve plate; 41. First groove; 5. Limiting element; 6. Draining element. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] It should be noted that in the description of this utility model, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0035] Example: This example discloses a one-way valve, comprising:

[0036] Valve seat;

[0037] A flow channel is provided inside the valve seat, and a step is provided inside the flow channel;

[0038] The valve core includes a valve plate 4 and a support member 3 supporting the valve plate 4. The valve plate 4 is elastic and can conform to the stepped surface to close the flow channel. A first groove 41 is provided on the side of the valve plate 4 facing the stepped surface. The first groove 41 is provided at least in the part of the valve plate 4 that contacts the stepped surface. The support member 3 is connected to the valve seat.

[0039] In some feasible embodiments, the valve seat includes a first valve body 1 and a second valve body 2. The first valve body 1 has a first flow channel 11, and one end of the first valve body 1 has a second groove 12 arranged along the circumferential direction of the first flow channel 11. The second valve body 2 is sleeved on the end of the first valve body 1 with the second groove 12, and the second valve body 2 is sleeved on the outside of the first valve body 1. The second valve body 2 has a valve cavity 21 communicating with the first flow channel 11, and a second flow channel 22 communicating with the valve cavity 21.

[0040] In some feasible embodiments, the valve plate 4 is made of materials such as polyethylene, polyolefin polymer, polyurethane, polypropylene or silicone, and is machined or molded.

[0041] Understandably, the valve plate 4 will wrinkle under repeated impacts from the fluid, creating gaps when the valve plate 4 and the stepped surface are in contact, leading to liquid leakage. The one-way valve disclosed in this application has a first groove 41 provided on the side of the valve plate 4 facing the first valve body 1. The sidewall forming the first groove 41 can prevent wrinkling of the valve plate 4 surface, thereby ensuring sealing performance.

[0042] If the end faces of valve plate 4 and the first valve body 1 are completely in contact, under the action of liquid, the end faces of valve plate 4 and the first valve body 1 will adhere to each other, resulting in a greater pressure required to open valve plate 4. This application provides a second groove 12 on the end face of the first valve body 1, which is arranged along the circumferential direction of the first flow channel 11, thereby reducing the contact area between valve plate 4 and the first valve body 1, preventing valve plate 4 from being too tightly attached to the first valve body 1, and thus avoiding the inability of liquid to open valve plate 4.

[0043] The first valve body 1 and the second valve body 2 are clearance-fitted. The inner sidewall of the second valve body 2 is provided with at least three second limiting protrusions 23, which are distributed at intervals around the periphery of the first valve body 1. The clearance fit replaces the interference fit in traditional technology, avoiding valve body deformation caused by thermal stress during assembly. Simultaneously, the second limiting protrusions 23 are used to position the first valve body 1, ensuring that the first valve body 1 and the second valve body 2 are concentric.

[0044] In some feasible embodiments, such as Figure 2 As shown, along the circumferential direction of the second valve body 2, three second limiting protrusions 23 are equally spaced on the inner sidewall of the second valve body 2, and the inward-facing side of the second limiting protrusions 23 is arc-shaped. When the first valve body 1 is inserted into the second valve body 2, the three second limiting protrusions 23 respectively contact the outer surface of the first valve body 1.

[0045] The first valve body 1 is provided with a first connecting part 15 that protrudes radially therefrom, and the second valve body 2 is provided with a second connecting part 25 at one end facing the first valve body 1. The first valve body 1 and the second valve body 2 are sealed together through the first connecting part 15 and the second connecting part 25.

[0046] In some feasible embodiments, the second connecting portion 25 is provided with an ultrasonic welding rib 251 (energy-conducting rib) on the side facing the first connecting portion 15. The ultrasonic welding rib 251 is arranged along the circumferential direction of the second valve body 2 and has a triangular cross-section. The protruding first connecting portion 15 and the ultrasonic welding rib 251 can be welded together by ultrasonic welding technology, thereby sealingly connecting the first valve body 1 and the second valve body 2.

[0047] The support member 3 includes a bracket 31 connected to the second valve body 2 and a ball 32 connected to the bracket 31, and the valve plate 4 and the ball 32 are connected and fixed.

[0048] In some feasible embodiments, such as Figure 2 As shown, the support member 3 includes multiple brackets 31 extending inward from the inner wall of the second valve body 2, and the end of each bracket 3 opposite to the second valve body 2 is jointly fixed to a ball 32. It should be noted that, in conjunction with... Figure 1 As shown, there is a gap between each of the brackets 31, and the second flow channel 22 and the valve chamber 21 are connected through the gap between the brackets 31.

[0049] The inner wall of the second valve body 2 is provided with at least three first limiting protrusions 24, which are distributed at intervals around the valve plate 4. The first limiting protrusions 24 are used to limit the valve plate 4, ensuring that the center of the valve plate 4 is fixedly connected to the support member 3, thereby ensuring that the force on each part of the valve plate 4 is uniform when the fluid flows.

[0050] In some feasible embodiments, such as Figure 2 , 3 As shown, along the circumferential direction of the second valve body 2, three first limiting protrusions 24 are provided at equal intervals on the inner sidewall of the second valve body 2. When the valve plate 4 is installed into the valve cavity 21, the three first limiting protrusions 24 respectively contact the circumference of the valve plate 4.

[0051] When valve plate 4 opens under the action of fluid, its edge is suspended in the air. Due to the unstable flow of fluid, the edge of the valve plate will repeatedly slap against the liquid, which can easily lead to valve plate fatigue or even loss of flexibility. Therefore, this application provides a limiting member 5 in the valve cavity 21. The limiting member 5 is located on the side of valve plate 4 away from the first valve body 1 and is distributed on the edge of valve plate 4. The limiting member 5 is connected and fixed to the first valve body 1 or the second valve body 2. By supporting the edge of valve plate 4 with the limiting member 5, the slapping vibration of valve plate 4 can be reduced.

[0052] In some feasible embodiments, such as Figure 2As shown, the limiting member 5 is disposed on the bracket 31, and the side of the limiting member 5 facing the valve plate 4 is arc-shaped. The distance between the limiting member 5 and the valve plate 4 is controlled between 0.2 mm and 0.8 mm.

[0053] When no external force is applied, the valve plate 4 has a concave first arc surface on the side facing the first valve body 1. The end face of the first valve body 1 is provided with a boss extending axially along the first flow channel 11, and the boss is provided with a second arc surface that fits against the first arc surface. The sealing performance is ensured by the fit between the first arc surface and the second arc surface.

[0054] In some feasible embodiments, such as Figure 4 As shown, the end face of the first valve body 1 is provided with two bosses 13a and 13b extending axially along the first flow channel 11. The bosses 13a and 13b are spaced apart, and a second groove 12 is formed between the bosses 13a and 13b. A second arc surface 14a and a second arc surface 14b are respectively provided on the side of the bosses 13a and 13b away from the first valve body 1. When no external force is applied, the arc surfaces of the valve plate 4 are in contact with the second arc surfaces 14a and 14b of the two bosses 13a and 13b, respectively.

[0055] The first flow channel 11 of the first valve body 1 is provided with a flow guide 6, which is connected to the inner sidewall of the first valve body 1. The flow guide 6 can buffer the fluid to reduce the wear of the fluid on the valve plate 4 and improve the service life of the valve plate 4.

[0056] In some feasible embodiments, such as Figure 4 As shown, the draining component 6 is Y-shaped, and the three vertices of the Y-shaped draining component 6 are respectively connected to the inner wall of the first valve body 1.

[0057] The first groove 41 on the valve plate 4 is circular, and a first groove 41 is provided at a preset distance with the geometric center of the valve plate 4 as the center.

[0058] In some feasible embodiments, such as Figure 5 As shown, with the geometric center of the valve plate 4 as the center, a first groove 41 is provided every 1 mm.

[0059] The second valve body 2 has an annular groove 26 on its end face opposite to the first valve body 1, and the outer wall of the annular groove 26 has a thread 261. The annular groove 26 and the thread 261 are used to connect to the outer pipe body.

[0060] This utility model uses specific embodiments to illustrate the principle and implementation of the utility model. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the utility model. Therefore, the content of this specification should not be construed as a limitation of the utility model.

Claims

1. A one-way valve, characterized in that, include: Valve seat; A flow channel is provided inside the valve seat, and a step is provided inside the flow channel; The valve core includes a valve plate and a support member for supporting the valve plate. The valve plate is elastic and can conform to the stepped surface to close the flow channel. A first groove is provided on the side of the valve plate facing the stepped surface. The first groove is provided at least in the part of the valve plate that contacts the stepped surface. The support member is connected to the valve seat.

2. The one-way valve as described in claim 1, characterized in that, The valve seat includes: A first valve body is provided with a first flow channel, and a second groove is provided at one end of the first valve body along the circumferential direction of the first flow channel. The second valve body is sleeved with one end of the first valve body that has a second groove. The second valve body has a valve cavity that communicates with the first flow channel and a second flow channel that communicates with the valve cavity. When the first valve body and the second valve body are sleeved together, the end face of the first valve body forms the stepped surface, and the first flow channel, the valve cavity and the second flow channel are combined to form the flow channel.

3. The one-way valve as described in claim 1, characterized in that, The first groove is circular, with the geometric center of the valve plate as the center, and one of the first grooves is set at a preset distance.

4. The one-way valve as described in claim 2, characterized in that, When no external force is applied, the valve plate has a concave first arc surface on the side facing the step; The step is provided with a boss extending axially along the first flow channel, and the boss is provided with a second arc surface that fits the first arc surface.

5. The one-way valve as described in claim 2, characterized in that, The inner wall of the second valve body is provided with at least three first limiting protrusions, which are distributed at intervals around the valve plate.

6. The one-way valve as described in claim 2, characterized in that, A limiting element is provided inside the valve cavity. The limiting element is located on the side of the valve plate away from the first valve body and is distributed on the edge of the valve plate. The limiting element is connected and fixed to the first valve body or the second valve body.

7. The one-way valve as described in claim 2, characterized in that, The first valve body and the second valve body are fitted with a clearance. The inner wall of the second valve body is provided with at least three second limiting protrusions, which are distributed at intervals around the periphery of the first valve body.

8. The one-way valve as described in claim 7, characterized in that, The first valve body is provided with a first connecting portion that protrudes radially therefrom, and the second valve body is provided with a second connecting portion at one end facing the first valve body. The first valve body and the second valve body are sealed together through the first connecting portion and the second connecting portion.

9. The one-way valve as described in claim 2, characterized in that, The first flow channel is provided with a flow guide, which is connected to the first valve body.

10. The one-way valve as described in claim 2, characterized in that, The second valve body has an annular groove on the end face opposite to the first valve body, and the outer wall of the annular groove is threaded.

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