Medical three-way valve device

Abstract

The application relates to a medical three-way valve device, which comprises a valve body, a first cavity, a second cavity and a third cavity, a first liquid inlet channel, a second liquid inlet channel and a liquid outlet channel; the valve body further comprises a first valve hole, a first flow guide hole, a second valve hole and a second flow guide hole. A first elastic valve comprises a first elastic plug and a first connecting column, the first connecting column is connected to the first valve hole in a plug-in mode, the first elastic plug is elastically sealed to the cavity wall of the third cavity, and the first flow guide hole is located in the sealing range of the first elastic plug; a second elastic valve comprises a second elastic plug and a second connecting column, the second connecting column is connected to the first valve hole in a plug-in mode, and the second elastic plug is elastically sealed to the cavity wall of the third cavity; the liquid in the first cavity and the liquid in the second cavity are mixed in the third cavity. The liquid in the third cavity is effectively mixed, and external pollution sources are prevented from entering the circulating pipeline.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and in particular to a medical three-way valve device. Background Technology

[0002] In medical products, reagents and solutions need to be mixed, and this mixing requires flexible adjustments based on different mixing ratios. For example, nurses use a syringe to draw reagents and inject them into solution bottles, then mix them to achieve uniform diffusion.

[0003] Chinese patent CN217907927U discloses a universal sclerotherapy aspiration needle and injection device for cysts. The cyst sclerotherapy aspiration needle includes: a puncture assembly including a puncture needle; a switching assembly including a three-way valve; a switching switch; an operating tube containing a one-way valve; and a syringe. This invention, by setting up a switching assembly, allows the switching switch to control the connection of two lines in the three-way valve, thereby enabling medical personnel to freely switch the connection routes. This separates the injection and aspiration routes, both of which are connected to the puncture needle on the switching assembly. In actual use, only one puncture is required. By changing the connection state of the lines through the switching switch, injection and aspiration can be performed separately using the syringe. Simultaneously, a one-way valve is installed in the operating tube connected to the three-way valve to ensure instrument sealing, effectively reducing patient pain during treatment and preventing wound infection.

[0004] In related technologies, one-way valves are installed in pipeline systems to ensure unidirectional flow of liquids. However, existing one-way valves in pipeline systems have a single function and are prone to failure such as slippage, jamming, and other technical problems. Furthermore, one-way valves are only used for liquid flow and are insufficient for initial mixing of reagents and solutions, requiring additional mixing structures, which leads to large mixing volumes and significant waste. Therefore, improvements are needed. Summary of the Invention

[0005] To overcome the problems existing in related technologies, embodiments of the present invention provide a medical three-way valve device.

[0006] A medical three-way valve device according to an embodiment of the present invention includes:

[0007] The valve body includes a first chamber, a second chamber, and a third chamber that are independently provided; a first liquid inlet channel that communicates with the first chamber; a second liquid inlet channel that communicates with the second chamber; and a liquid outlet channel that communicates with the third chamber.

[0008] The valve body further includes a first valve hole connecting the first cavity and the third cavity, at least one first guide hole surrounding the first valve hole, a second valve hole connecting the second cavity and the third cavity, and at least one second guide hole surrounding the first valve hole;

[0009] A first elastic valve is inserted into the first valve hole. The first elastic valve includes a first elastic plug and a first connecting post protruding from the first elastic plug. The first connecting post is inserted into the first valve hole. The first elastic plug is elastically sealed against the cavity wall of the third cavity. The first guide hole is located within the sealing range of the first elastic plug.

[0010] A second elastic valve is inserted into the second valve hole. The second elastic valve includes a second elastic plug and a second connecting post protruding from the second elastic plug. The second connecting post is inserted into the first valve hole. The second elastic plug is elastically sealed against the cavity wall of the third cavity. The first guide hole is located within the sealing range of the second elastic plug.

[0011] The first chamber and the third chamber are connected when the liquid pressure in the first chamber is greater than or equal to the elastic preload of the first elastic plug, and closed when the liquid pressure in the first chamber is less than the elastic preload of the first elastic plug.

[0012] The second chamber and the third chamber are connected when the liquid pressure in the second chamber is greater than or equal to the elastic preload of the second elastic plug, and closed when the liquid pressure in the second chamber is less than the elastic preload of the second elastic plug.

[0013] The liquid in the first cavity and the liquid in the second cavity are mixed in the third cavity.

[0014] In one embodiment, the first resilient plug is provided with an annular groove surrounding the first valve hole, and at least a portion of the opening of the first flow guide hole is connected to the annular groove.

[0015] In one embodiment, the first elastic plug is provided with a sealing surface, the annular groove is recessed from the sealing surface, the end of the annular groove intersects with the arc surface of the first connecting column, and the sidewall of the annular groove intersects with the sealing surface in a conical shape.

[0016] In one embodiment, the first guide hole is an elongated hole structure, and the length direction of the first guide hole extends outward from the first valve hole.

[0017] In one embodiment, the liquid outlet channel is located in the extending direction of the first elastic valve, and the first elastic valve closes the liquid outlet channel when it elastically extends; and / or, the first elastic valve reduces the conductive area between the liquid outlet channel and the third cavity when it elastically extends.

[0018] In one embodiment, the volume of the first cavity is less than or equal to the volume of the second cavity.

[0019] In one embodiment, the third cavity is a flat cavity, and the thickness of the third cavity is less than the maximum deformation of the first elastic plug; or, the thickness of the third cavity is less than the elastic deformation of the first connecting post.

[0020] In one embodiment, the third cavity is provided with interlocking flow guide baffles, and a guide channel is formed between two adjacent flow guide baffles. A portion of the flow guide baffles extends toward the first valve hole, and another portion of the flow guide baffles extends toward the second valve hole.

[0021] In one embodiment, the volume ratio of the third cavity to the first cavity is K, where 2≤K≤5.

[0022] In one embodiment, the valve body further includes an expansion cavity connecting the first liquid inlet channel and the first cavity. The aperture of the expansion cavity is larger than the aperture of the first liquid inlet channel. The ratio of the aperture of the expansion cavity to the aperture of the first liquid inlet channel is A, where 2 ≤ A ≤ 5. The ratio of the aperture of the expansion cavity to the aperture of the first cavity is B, where 2.5 ≤ B ≤ 6.

[0023] The technical solution provided by the embodiments of the present invention can include the following beneficial effects: the valve body is provided with a first chamber, a second chamber, and a third chamber. The third chamber can mix the liquids conveyed in the first and second chambers, thereby realizing the mixing of liquids within the three-way valve device and improving the uniformity of mixing. The first and second chambers are independent channels for corresponding liquid flows, reducing flow rate. A first elastic valve is used to control the unidirectional flow of the first and third chambers, and a second elastic valve is used to control the unidirectional flow of the second and third chambers, realizing unidirectional liquid flow in their respective channels and effective mixing in the third chamber, preventing external contaminants from entering the circulation pipeline.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0026] Figure 1This is a schematic diagram of a medical three-way valve device according to an exemplary embodiment.

[0027] Figure 2 This is a cross-sectional structural schematic diagram of a medical three-way valve device in its initial state, according to an exemplary embodiment.

[0028] Figure 3 This is a cross-sectional schematic diagram illustrating the mixing of a medical three-way valve device in the closed state of the third chamber, according to an exemplary embodiment.

[0029] Figure 4 This is a cross-sectional view of a medical three-way valve device in the third chamber open state, according to an exemplary embodiment.

[0030] Figure 5 This is a schematic diagram of the structure of a first resilient valve according to an exemplary embodiment.

[0031] Figure 6 This is an exploded structural diagram of a medical three-way valve device according to an exemplary embodiment.

[0032] Figure 7 This is a schematic diagram of the valve body according to an exemplary embodiment.

[0033] Figure 8 This is a schematic diagram of the transverse cross-sectional structure of a medical three-way valve device according to an exemplary embodiment.

[0034] In the figure, valve body 10; valve body 101; first cover plate 102; second cover plate 103; first groove 104; second groove 105; first inlet channel 11; second inlet channel 12; outlet channel 13; first chamber 14; second chamber 15; expansion chamber 151; third chamber 16; first valve hole 17; first guide hole 171; second valve hole 18; second guide hole 181; guide baffle 19; first elastic valve 20; first connecting post 21; first elastic plug 22; annular groove 23; arc-shaped surface 231; conical surface 232; undercut 24; sealing surface 25; mounting hole 26; second elastic valve 30; second connecting post 31; second elastic plug 32. Detailed Implementation

[0035] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0036] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0037] In the description of this invention, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating a connection between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] like Figures 1 to 5 As shown, the present invention provides a medical three-way valve device, which includes a valve body 10, a first elastic valve 20 and a second elastic valve 30 installed on the valve body 10. The first elastic valve 20 and the second elastic valve 30 can elastically extend and retract to open and close corresponding channels in the valve body 10, thereby realizing unidirectional flow of liquid.

[0039] The valve body 10 includes three independently configured chambers: a first chamber 14, a second chamber 15, and a third chamber 16; a first inlet channel 11 communicating with the first chamber 14; a second inlet channel 12 communicating with the second chamber 15; and an outlet channel 13 communicating with the third chamber 16. The first chamber 14, second chamber 15, and third chamber 16 are three hollow cavity structures independently configured within the valve body 10. The first inlet channel 11 connects to a first liquid source, allowing the first liquid source to flow into the first chamber 14. The second inlet channel 12 connects to a second liquid source, allowing the second liquid source to flow into the second chamber 15. The outlet channel 13 connects to the third chamber 16 to discharge the mixed liquid within the third chamber 16.

[0040] Furthermore, the valve body 10 also includes a first valve hole 17 connecting the first chamber 14 and the third chamber 16, and at least one first guide hole 171 surrounding the first valve hole 17. A first elastic valve 20 is inserted into the first valve hole 17 to fix the first elastic valve 20 to the valve body 10. In its initial state, the first elastic valve 20 closes the first valve hole 17 and all the first guide holes 171. The first elastic valve 20 includes a first elastic plug 22 and a first connecting post 21 protruding from the first elastic plug 22. The first elastic plug 22 protrudes radially from the first connecting post 21, forming a flange-shaped sealing rib structure. The first connecting post 21 is inserted into the first valve hole 17, the first elastic plug 22 elastically seals against the cavity wall of the third chamber 16, and the first guide hole 171 is located within the sealing range of the first elastic plug 22.

[0041] The first chamber 14 and the third chamber 16 are connected when the liquid pressure in the first chamber 14 is greater than or equal to the elastic preload of the first elastic plug 22, and closed when the liquid pressure in the first chamber 14 is less than the elastic preload of the first elastic plug 22. That is, when the liquid pressure in the first chamber 14 exceeds the elastic force of the first elastic valve 20, the first guide hole 171 connects the first chamber 14 and the third chamber 16, allowing the first liquid source to flow unidirectionally from the first chamber 14 to the third chamber 16. When the liquid pressure in the first chamber 14 is less than the elastic force of the first elastic valve 20, the first elastic plug 22 elastically resets and seals the first guide hole 171, thereby blocking the passage between the first chamber 14 and the third chamber 16 and achieving unidirectional flow.

[0042] The valve body 10 also includes a second valve hole 18 connecting the second chamber 15 and the third chamber 16, and at least one second guide hole 181 surrounding the first valve hole 17. A second elastic valve 30 is inserted into the second valve hole 18. The second elastic valve 30 includes a second elastic plug 32 and a second connecting post 31 protruding from the second elastic plug 32. The second connecting post 31 is inserted into the first valve hole 17. The second elastic plug 32 elastically seals against the wall of the third chamber 16, and the first guide hole 171 is located within the sealing range of the second elastic plug 32. The structure of the second elastic valve 30 is basically the same as that of the first elastic valve 20. The elastic sealing form and working principle can be understood by referring to the structure of the first elastic valve 20, and will not be repeated here.

[0043] The second chamber 15 and the third chamber 16 are connected when the liquid pressure in the second chamber 15 is greater than or equal to the elastic preload of the second elastic plug 32, and closed when the liquid pressure in the second chamber 15 is less than the elastic preload of the second elastic plug 32. The liquid in the first chamber 14 and the liquid in the second chamber 15 mix in the third chamber 16.

[0044] The valve body 10 is provided with a first chamber 14, a second chamber 15, and a third chamber 16. The third chamber 16 can mix the liquids conveyed in the first chamber 14 and the second chamber 15, thereby achieving liquid mixing within the three-way valve device and improving the uniformity of mixing. The first chamber 14 and the second chamber 15 are independent channels for corresponding liquid flows, reducing flow rate. The first elastic valve 20 is used to control the unidirectional flow of the first chamber 14 and the third chamber 16, and the second elastic valve 30 is used to control the unidirectional flow of the second chamber 15 and the third chamber 16, achieving unidirectional liquid flow in their respective channels and effective mixing in the third chamber 16, preventing external contaminants from entering the circulation pipeline.

[0045] The first elastic plug 22 protrudes in a flange shape to seal the first valve hole 17 and the first guide hole 171. Optionally, the first elastic plug 22 is a thin-walled spring sheet structure, which is elastically tensioned and sealed to the wall of the valve body 10, and elastically deforms under the liquid pressure in the first guide hole 171 to allow liquid flow. Optionally, the first elastic plug 22 is a thick-walled structure with local recesses to guide the first elastic plug 22 to move in a directional elastic deformation relative to the valve body 10, thereby enabling it to open when pressure conditions are met. In one embodiment, the first elastic plug 22 is provided with an annular groove 23 surrounding the first valve hole 17, and at least part of the opening of the first guide hole 171 is connected to the annular groove 23. The arc-shaped groove is formed by recessing from the surface of the first elastic plug 22 and is arranged around the first connecting post 21, so that the first elastic plug 22 forms a preset elastic deformation part in the region of the annular groove 23, which facilitates control of the elastic deformation area and sealing surface area of ​​the first elastic plug 22.

[0046] Specifically, the first elastic plug 22 is provided with a sealing surface 25, which is a plane intersecting the centerline of the first connecting post 21. The sealing surface 25 intersects the centerline of the first connecting post 21. The annular groove 23 is recessed from the sealing surface 25, forming a groove structure that reduces the structural strength of the annular region. Furthermore, the annular groove 23 is an annular structure, which can produce elastic deformation at any angle and in any direction, with a wide range of deformation angles.

[0047] The cross-section of the annular groove 23 can be configured as a circular arc groove, a rectangular groove, a triangular groove, or other groove structures. In an optional embodiment, the end of the annular groove 23 intersects with the arc surface of the first connecting post 21, and the sidewall of the annular groove 23 intersects with the sealing surface 25 at a conical surface 232. The annular groove 23 is composed of multiple parts, wherein the bottom of the annular groove 23 extends to intersect with one side of the first connecting post 21 as an arc-shaped curved surface 231 to form a smooth transition structure with a rounded corner. The bottom of the annular groove 23 extends to intersect with the side facing away from the first connecting post 21 as a conical surface 232, thereby making the pressure surface received by the annular groove 23 inclined, further increasing the pressure force on the conical surface 232 after the liquid enters the annular groove 23, so that the first elastic plug 22 elastically deforms in a direction perpendicular to the conical surface 232, improving the controllability of the deformation direction.

[0048] The first guide holes 171 are all located within the coverage area of ​​the first elastic plug 22 to achieve on / off control. The first connecting post 21 passes through the first valve hole 17, and a buckle 24 is provided at the end of the first connecting post 21. The buckle 24 and the first elastic plug 22 are respectively snapped into the wall surfaces on both sides of the first valve hole 17, so that the first elastic valve 20 is fixed to the valve body 10, and the first elastic plug 22 elastically seals against the wall surface.

[0049] Optionally, one or more first guide holes 171 may be provided, and the first guide holes 171 and the first valve holes 17 may be spaced apart to provide directional flow. Optionally, one or more first guide holes 171 may be provided, and the first guide holes 171 and the first valve holes 17 may be intersecting to provide multi-regional flow.

[0050] like Figures 2 to 7 As shown, in one embodiment, the first guide hole 171 is an elongated hole structure, extending outward from the first valve hole 17 in its length direction. The first guide hole 171 is an elongated hole, which can be configured as an arc-shaped hole, a rectangular hole, a waist-shaped hole, or other elongated hole structures with different aspect ratios. The first guide hole 171 is configured as an elongated hole so that a portion of the hole space is located in the annular groove 23 region, allowing liquid to be transported into the annular groove 23, forming a pre-pressure for elastic deformation. Further, a portion of the holes in the first guide hole 171 are located on the sealing surface 25, actively pushing the sealing surface 25 away from the wall of the valve body 10, thus forming the starting point of elastic deformation at a designated location, resulting in good unidirectional opening and closing control. Preferably, two or more first guide holes 171 are provided, evenly distributed around the first valve hole 17. Optionally, four first guide holes 171 are provided, with adjacent first guide holes 171 at a 90-degree angle.

[0051] In one embodiment, the third cavity 16 is a flat cavity, specifically, the height of the third cavity 16 is small, and the first elastic plug 22 is located inside the third cavity 16, thereby further reducing the distance between the first elastic plug 22 and the plane where the liquid outlet channel 13 is set in the third cavity 16. When the first elastic plug 22 elastically deforms under the action of liquid, and the thickness of the third cavity 16 is less than the maximum deformation of the first elastic plug 22, the liquid outlet channel 13 is closed when the first elastic plug 22 elastically deforms. When the deformation of the first elastic valve 20 occurs at the first connecting column 21, and the thickness of the third cavity 16 is less than the elastic deformation of the first connecting column 21, when the first elastic plug 22 is subjected to pressure and causes the first connecting column 21 to elastically deform, the first elastic plug 22 then closes the liquid outlet channel 13.

[0052] In one embodiment, the first resilient valve 20 includes a mounting hole 26 extending from the end of the first connecting post 21 toward the first resilient plug 22. The mounting hole 26 is a countersunk hole. The end of the mounting hole 26 extends to the undercut 24. During the assembly of the first resilient valve 20 into the first valve hole 17, a pin is inserted into the mounting hole 26. The pin pushes the first connecting post 21 to elastically deform, thereby reducing the axial dimension of the first connecting post 21 and facilitating the insertion connection between the first connecting post 21 and the first valve hole 17.

[0053] like Figures 2 to 3 As shown, the liquid outlet channel 13 communicates with the third chamber 16 and is used to guide the liquid in the third chamber 16 to flow out. In one embodiment, the liquid outlet channel 13 is located in the extension direction of the first elastic valve 20. When the first elastic valve 20 elastically extends, it closes the liquid outlet channel 13 so that the liquids in the second chamber 15 and the first chamber 14 are mixed in the third chamber 16. After the first elastic valve 20 elastically resets, it releases the closure of the liquid outlet channel 13, allowing the mixed liquid to flow out smoothly from the liquid outlet channel 13. Preferably, the centerline of the liquid outlet channel 13 coincides with the centerline of the first elastic valve 20. When the liquid pressure in the first chamber 14 exceeds a preset pressure value, the first elastic valve 20 will extend, thereby enabling the first elastic valve 20 to close the opening of the liquid outlet channel 13. It is worth mentioning that the liquid pressure in the first chamber 14 is adjustable, thereby enabling the first elastic valve 20 to have different extension lengths under different pressures, thus adjusting the different opening and closing states of the liquid outlet channel 13.

[0054] In another alternative embodiment, the first elastic valve 20 reduces the conductive area between the outlet channel 13 and the third chamber 16 when it elastically elongates, thereby reducing the flow rate of the mixed liquid flowing out of the third chamber 16. In this embodiment, the first elastic plug 22 is located in the third chamber 16 and is respectively disposed on the opposite side walls of the third chamber 16 with the outlet channel 13. Under the action of the liquid pressure in the first chamber 14, the first elastic plug 22 elastically elongates towards the outlet channel 13, thereby reducing the gap between the first elastic plug 22 and the outlet channel 13, and thus reducing the flow rate of the mixed liquid flowing out of the third chamber 16. Preferably, the end of the first elastic plug 22 is partially provided with a protruding abutment boss, the abutment boss having a frustum-shaped structure, the apex of the cone abutting and sealing the outlet channel 13.

[0055] The first chamber 14 and the second chamber 15 are spaced apart in the valve body 10, forming a buffer space for accommodating the corresponding input solution and drug storage. The first chamber 14 is used for inputting the drug, and the second chamber 15 is used for inputting the solution. The volume of the first chamber 14 is less than or equal to the volume of the second chamber 15, and the liquids in the second chamber 15 and the first chamber 14 are proportionally mixed to obtain a stable drug ratio, resulting in high overall ratio and stability.

[0056] In one embodiment, the volume ratio of the third chamber 16 to the first chamber 14 is K, where 2 ≤ K ≤ 5. Liquid in the first chamber 14 enters the third chamber 16 and mixes with the liquid output from the second chamber 15. The volume of the third chamber 16 is larger than the volume of the first chamber 14. The first chamber 14 can regulate the stability of the liquid flow rate entering the third chamber 16 and maintain a balanced liquid flow rate and volume. The large volume of the third chamber 16 allows it to simultaneously accommodate the solutions from the first chamber 14 and the second chamber 15, thereby achieving good mixing and a good containment effect. Specifically, the volume ratio K of the third chamber 16 to the first chamber 14 is 2, 2.5, 3, 3.5, 4, or 5.

[0057] Furthermore, the valve body 10 also includes an expansion cavity 151 connecting the first liquid inlet channel 11 and the first cavity 14. The aperture of the expansion cavity 151 is larger than the aperture of the first liquid inlet channel 11, and the ratio of the aperture of the expansion cavity 151 to the aperture of the first liquid inlet channel 11 is A, where 2 ≤ A ≤ 5; the ratio of the aperture of the expansion cavity 151 to the aperture of the first cavity 14 is B, where 2.5 ≤ B ≤ 6. The first liquid inlet channel 11 and the expansion cavity 151 form a stepped aperture structure, and the expansion cavity 151 and the first cavity 14 also form a stepped aperture structure. This allows the pressure of the fluid entering the first cavity 14 to gradually decrease, resulting in a gradual reduction in flow velocity and improving the diffusion effect of the liquid within the first cavity 14. This is beneficial for improving the uniformity of the drug input into the first cavity 14.

[0058] Liquid enters the expansion chamber 151 through the small-diameter first inlet channel 11, achieving initial expansion and deceleration. The ratio A between the diameter of the expansion chamber 151 and the diameter of the first inlet channel 11 is 2, 2.5, 3, 3.5, 4, or 5. Liquid then enters the first chamber 14 through the small-diameter expansion chamber 151, achieving secondary expansion and deceleration. The ratio B between the diameter of the expansion chamber 151 and the diameter of the first chamber 14 is 2.5, 3, 3.5, 4, 5, or 6.

[0059] like Figure 7 and Figure 8 As shown, in one embodiment, the third chamber 16 is provided with staggered flow guide baffles 19, forming a guide channel between adjacent flow guide baffles 19. A portion of the flow guide baffles 19 extends towards the first valve hole 17, and another portion extends towards the second valve hole 18. The flow guide baffles 19 are staggered within the third chamber 16, thereby expanding and mixing the liquid flowing into the first chamber 14 and the second chamber 15 along the channels between the flow guide baffles 19. The staggered mixing channels formed between the flow guide baffles 19 result in good mixing. Preferably, the flow guide baffles 19 have a triangular structure, and the baffles between adjacent flow guide baffles 19 are trapezoidal, thereby creating turbulence behind the larger end of the flow guide baffles 19 and improving the uniformity of mixing.

[0060] In one embodiment, the valve body 10 includes a valve body 101, a first cover plate 102 and a second cover plate 103 covering both ends of the valve body 101. The valve body 101 is provided with a first groove 104, a second groove 105 and a third groove disposed opposite to each other. The first cover plate 102 is disposed on the valve body 101 and covers the openings of the first groove 104 and the second groove 105. The first cover plate 102 is fixed to the valve body 101, and its edges are integrally formed by adhesive or molding process, thereby forming a first cavity 14 in the first groove 104 and a second cavity 15 in the second groove 105. The second cover plate 103 is fixed to the valve body 101, and its edges are integrally formed by adhesive or molding process, thereby forming a third cavity 16 in the third groove. The valve body 10 is made of thermoplastic elastomer, silicone, or other polymer materials.

[0061] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0062] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A medical three-way valve device, characterized in that, include: The valve body includes a first chamber, a second chamber, and a third chamber that are independently provided; a first liquid inlet channel that communicates with the first chamber; a second liquid inlet channel that communicates with the second chamber; and a liquid outlet channel that communicates with the third chamber. The valve body further includes a first valve hole connecting the first cavity and the third cavity, at least one first guide hole surrounding the first valve hole, a second valve hole connecting the second cavity and the third cavity, and at least one second guide hole surrounding the first valve hole; A first elastic valve is inserted into the first valve hole. The first elastic valve includes a first elastic plug and a first connecting post protruding from the first elastic plug. The first connecting post is inserted into the first valve hole. The first elastic plug is elastically sealed against the cavity wall of the third cavity. The first guide hole is located within the sealing range of the first elastic plug. The first guide hole has an elongated hole structure, and the length direction of the first guide hole extends outward from the first valve hole. A second elastic valve is inserted into the second valve hole. The second elastic valve includes a second elastic plug and a second connecting post protruding from the second elastic plug. The second connecting post is inserted into the second valve hole. The second elastic plug is elastically sealed against the cavity wall of the third cavity. The second guide hole is located within the sealing range of the second elastic plug. The first chamber and the third chamber are connected when the liquid pressure in the first chamber is greater than or equal to the elastic preload of the first elastic plug, and closed when the liquid pressure in the first chamber is less than the elastic preload of the first elastic plug. The second chamber and the third chamber are connected when the liquid pressure in the second chamber is greater than or equal to the elastic preload of the second elastic plug, and closed when the liquid pressure in the second chamber is less than the elastic preload of the second elastic plug. The liquid in the first cavity and the liquid in the second cavity are mixed in the third cavity; The liquid outlet channel is located in the extension direction of the first elastic valve, and the first elastic valve closes the liquid outlet channel when it elastically extends. And / or, the first elastic valve reduces the conductive area between the liquid outlet channel and the third chamber when it elastically extends; The third cavity is provided with interlocking flow guide baffles, and a guide channel is formed between two adjacent flow guide baffles. A portion of the flow guide baffles extends toward the first valve hole, and another portion of the flow guide baffles extends toward the second valve hole.

2. The medical three-way valve device according to claim 1, characterized in that, The first elastic plug is provided with an annular groove surrounding the first valve hole, and at least part of the opening of the first guide hole is connected to the annular groove.

3. The medical three-way valve device according to claim 2, characterized in that, The first elastic plug is provided with a sealing surface, the annular groove is recessed from the sealing surface, the end of the annular groove intersects with the arc surface of the first connecting column, and the sidewall of the annular groove intersects with the sealing surface in a conical shape.

4. The medical three-way valve device according to claim 1, characterized in that, The volume of the first cavity is less than or equal to the volume of the second cavity.

5. The medical three-way valve device according to claim 1, characterized in that, The third cavity is a flat cavity, and the thickness of the third cavity is less than the maximum deformation of the first elastic plug; or, the thickness of the third cavity is less than the elastic deformation of the first connecting post.

6. The medical three-way valve device according to claim 1, characterized in that, The volume ratio of the third cavity to the first cavity is K, where 2≤K≤5.

7. The medical three-way valve device according to claim 1, characterized in that, The valve body further includes an expansion cavity connecting the first liquid inlet channel and the first cavity. The aperture of the expansion cavity is larger than the aperture of the first liquid inlet channel. The ratio of the aperture of the expansion cavity to the aperture of the first liquid inlet channel is A, where 2≤A≤5; the ratio of the aperture of the expansion cavity to the aperture of the first cavity is B, where 2.5≤B≤6.

Images