Medical three-way valve

Abstract

The utility model relates to a medical three-way valve which comprises a main pipe for conveying liquid, at least two three-way valve shells are arranged on the main pipe, the three-way valve shells and the main pipe are integrally formed, and valve elements are rotationally arranged on the three-way valve shells. The three-way valve has the advantages that the two three-way valve shells and the main pipe are integrally formed, and the problem that the structures of two traditional independent three-way valves are not compact enough is remarkably solved. According to the design, the space occupied by the three-way valve is reduced, the overall structure is more compact, and meanwhile the adaptability of the three-way valve in different application scenes is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical instruments, and in particular relates to a medical three-way valve. Background Art

[0002] The medical three-way valve is an important infusion, nursing and protective device used to control the direction and speed of liquid flow during medical procedures. It usually consists of three outlets and one inlet, which can be connected to different medical devices such as infusion tubes, blood draw tubes and drug tubes, making it convenient for medical staff to perform various operations. The medical three-way valve can control the flow direction of infusion lines in different parts, so that the fluid can flow from one position to another. At the same time, it can adjust the flow rate of the fluid to ensure the stability of the fluid and the control of the flow rate during the infusion process, avoid the phenomenon of too fast or too slow flow, and ensure the safety and stability of the medical process.

[0003] A Chinese patent with authorization announcement number CN207970341U discloses a medical three-way valve, including a wrench and a valve body, the valve body including a valve body cavity, an inlet pipe, a first outlet pipe and a second outlet pipe; the inlet pipe, the first outlet pipe and the second outlet pipe are connected on the outside of the valve body cavity to form the valve body; an adjusting column with a through hole is provided at the lower part of the wrench, and the adjusting column is arranged inside the valve body cavity; an undercut is provided on the outer side of the upper part of the inlet pipe; a convex ring is provided on the inner side of the inlet pipe; a one-way valve is installed inside the inlet pipe, and the outer side of the lower part of the one-way valve is stuck in the convex ring and the bottom is in close contact with the inner side of the inlet pipe.

[0004] Regarding the above-mentioned related technologies, in actual production, when two three-way valves are needed, two separate three-way valves are usually used. However, the two three-way valves take up more space, the structure is not compact enough, and the space requirements for the application scenario are relatively high. Utility Model Content

[0005] In order to improve the problem that the structure of two separate three-way valves is not compact enough, the utility model provides a medical three-way valve, and the specific technical solution is as follows:

[0006] A medical three-way valve comprises a main pipe for liquid delivery, the main pipe is provided with at least two three-way valve shells, the three-way valve shells are integrally formed with the main pipe, and a valve core is rotatably provided on the three-way valve shell.

[0007] The two three-way valve housings are integrally formed with the main pipe, so that the structure can be compact and can be easily adapted to various application scenarios.

[0008] In a specific possible implementation scheme, the three-way valve housing includes a mounting tube integrally formed with the main pipe, the mounting tube is used for inserting the valve core, the valve core is rotatably connected to the mounting tube, an inlet pipe is integrally formed on the mounting tube, the inlet pipe is connected to the mounting tube, and the inlet pipe is provided with a thread.

[0009] In a specific feasible embodiment, the valve core includes a core tube inserted into the installation tube and rotatably connected to the installation tube. The core tube is provided with a through hole communicating with the main pipe, and the core tube is provided with a liquid inlet hole communicating with the inlet pipe.

[0010] In a specific feasible embodiment, a limiting convex ring is provided on the inner side of the installation tube, a limiting strip is provided on the core tube, and a guiding inclined surface for the limiting strip to press against is provided on the limiting convex ring.

[0011] In a specific feasible embodiment, an internal thread cap is provided at the end of the main pipe, a positioning cone ring is provided at one end of the main pipe close to the internal thread cap, and an inner ring strip for pressing against the positioning cone ring is provided on the internal thread cap.

[0012] During installation, by sleeving the internal thread cap on the main pipe and pressing the positioning cone ring, and finally sleeving it on the main pipe, the internal thread cap can be installed conveniently and quickly in this way.

[0013] In a specific feasible embodiment, a conical surface is provided at one end of the main pipe close to the internal thread cap.

[0014] In a specific feasible embodiment, a one-way valve is provided at one end of the main pipe away from the internal thread cap.

[0015] In a specific feasible embodiment, wing plates are provided on the main pipe, and anti-slip patterns are provided on both opposite sides of the wing plates. The wing plates can facilitate holding the three-way valve by hand.

[0016] The beneficial technical effects of the present utility model: By integrally forming the two three-way valve housings with the main pipe, the problem that the structure of the traditional two separate three-way valves is not compact enough is significantly improved. This design not only reduces the space occupied by the three-way valve, making the overall structure more compact, but also improves the adaptability of the three-way valve in different application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a medical three-way valve in an embodiment of the present utility model.

[0018] Figure 2 is a schematic structural diagram of the three-way valve housing and the valve core in an embodiment of the present utility model.

[0019] Figure 3 is a schematic structural diagram of the limiting convex ring in an embodiment of the present utility model.

[0020] Description of reference numerals: 1, main pipe; 2, three-way valve housing; 3, valve core; 4, installation pipe; 5, inlet pipe; 6, thread; 7, core pipe; 8, through hole; 9, liquid inlet hole; 10, limiting convex ring; 11, limiting strip; 12, guiding inclined surface; 13, internal thread nut; 14, positioning cone ring; 15, inner ring strip; 16, conical surface; 17, one-way valve; 18, wing plate. Detailed implementation manners

[0021] The following will Figures 1-3 further describe the present utility model in detail with reference to the accompanying drawings.

[0022] Referring to Figure 1 , a medical three-way valve includes a main pipe 1, and the main function of the main pipe 1 is to convey liquid. On the main pipe 1, at least two three-way valve housings 2 are provided. In this embodiment, there are two three-way valve housings 2, and in other embodiments, there may be three. These three-way valve housings 2 and the main pipe 1 are integrally formed, and this design greatly reduces the occupied space of the three-way valve and improves the structural compactness.

[0023] Referring to Figure 2 , each three-way valve housing 2 includes an installation pipe 4, and the installation pipe 4 and the main pipe 1 are integrally formed. The axis of the installation pipe 4 is perpendicular to the axis of the main pipe 1. The main function of the installation pipe 4 is to allow the valve core 3 to be inserted. An inlet pipe 5 is also integrally formed on the installation pipe 4. The axis of the inlet pipe 5 is perpendicular to the axes of the installation pipe 4 and the main pipe 1, and the inlet pipe 5 is communicated with the installation pipe 4, and fluid can enter the inside of the three-way valve through the inlet pipe 5. A thread 6 is also provided on the inlet pipe 5, which facilitates connection with other medical devices or pipes.

[0024] The valve core 3 mainly includes a core pipe 7, and this core pipe 7 is inserted into the installation pipe 4 and rotatably connected to the installation pipe 4. The valve core 3 can rotate freely in the installation pipe 4 to adjust the flow direction of the fluid. A handle is provided on the valve core 3, and a through hole 8 is provided on the core pipe 7, and this through hole 8 is communicated with the main pipe 1, and fluid can flow in the main pipe 1 through this through hole 8. At the same time, a liquid inlet hole 9 is also provided on the core pipe 7, and this liquid inlet hole 9 is communicated with the inlet pipe 5, and fluid can enter the liquid inlet hole 9 through the inlet pipe 5 and then flow to other places through other parts of the core pipe 7.

[0025] Referring to Figure 2 and Figure 3, in order to ensure the stable rotation of the valve core 3 within the installation pipe 4, a limiting convex ring 10 is further provided on the inner side of the installation pipe 4, and a plurality of limiting strips 11 are provided on the core pipe 7. The plurality of limiting strips 11 are evenly distributed along the circumferential direction of the core pipe 7. A guiding inclined surface 12 is provided on the limiting convex ring 10. When installing the valve core 3, the limiting strips 11 are squeezed along the guiding inclined surface 12 and clamped on the limiting convex ring 10. When the valve core 3 rotates, the limiting strips 11 will rotate along the limiting convex ring 10, thereby realizing the stable rotation of the valve core 3.

[0026] At the end of the main pipe 1, an internal thread cap 13 is further provided. To facilitate the installation of the internal thread cap 13, a positioning tapered ring 14 is provided at one end of the main pipe 1 close to the internal thread cap 13, and an inner ring strip 15 that presses against the positioning tapered ring 14 is provided on the internal thread cap 13. During installation, simply slip the internal thread cap 13 onto the main pipe 1, and the inner ring strip 15 will press against the positioning tapered ring 14 and be clamped at the end of the positioning tapered ring 14, thereby realizing the quick installation of the internal thread cap 13. In addition, a tapered surface 16 is provided at one end of the main pipe 1 close to the internal thread cap 13, which can facilitate the insertion of the internal thread cap 13.

[0027] At the other end of the main pipe 1, that is, the end far from the internal thread cap 13, a one-way valve 17 is provided. The function of this one-way valve 17 is to ensure that the fluid can only flow in one direction and prevent the occurrence of backflow phenomena.

[0028] To facilitate the operation of medical staff, a wing plate 18 is further provided on the main pipe 1. This wing plate 18 can facilitate the human hand to hold the three-way valve and ensure stability and safety during the operation process. At the same time, anti-slip patterns are provided on the two opposite sides of the wing plate 18, which can increase the friction between the human hand and the wing plate 18 and prevent slipping during the operation process.

[0029] In summary, the medical three-way valve of the present utility model realizes the compactness of the structure, reduces the space occupation, and improves the operation convenience by integrally forming a plurality of three-way valve housings 2 with the main pipe 1. At the same time, by reasonably designing components such as the valve core 3, the installation pipe 4, and the inlet pipe 5, the stable flow of the fluid and the precise control of the flow direction are ensured. In addition, the addition of components such as the internal thread cap 13, the one-way valve 17, and the wing plate 18 further improves the practicability and safety of the three-way valve.

[0030] The above are all the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A medical three-way valve, characterized in that: It includes a main pipe (1) for liquid transportation. At least two three-way valve housings (2) are provided on the main pipe (1). The three-way valve housings (2) are integrally formed with the main pipe (1), and a valve core (3) is rotatably provided on the three-way valve housings (2). An internal thread cap (13) is provided at the end of the main pipe (1). A positioning cone ring (14) is provided at one end of the main pipe (1) close to the internal thread cap (13). An inner ring strip (15) that presses against the positioning cone ring (14) is provided on the internal thread cap (13).

2. The medical three-way valve according to claim 1, characterized in that: The three-way valve housing (2) includes an installation pipe (4) integrally formed with the main pipe (1). The installation pipe (4) is used for the valve core (3) to be inserted. The valve core (3) is rotatably connected to the installation pipe (4). An inlet pipe (5) is integrally formed on the installation pipe (4). The inlet pipe (5) is communicated with the installation pipe (4), and a thread (6) is provided on the inlet pipe (5).

3. The medical three-way valve according to claim 2, wherein: The valve core (3) includes a core pipe (7) inserted into the installation pipe (4) and rotatably connected to the installation pipe (4). A through hole (8) communicated with the main pipe (1) is provided on the core pipe (7). A liquid inlet hole (9) communicated with the inlet pipe (5) is provided on the core pipe (7).

4. The medical three-way valve according to claim 3, characterized in that: A limiting convex ring (10) is provided on the inner side of the installation pipe (4). A limiting strip (11) is provided on the core pipe (7). A guiding inclined surface (12) for the limiting strip (11) to press against is provided on the limiting convex ring (10).

5. The medical three-way valve according to claim 1, wherein: A conical surface (16) is provided at one end of the main pipe (1) close to the internal thread cap (13).

6. The medical three-way valve according to claim 1, characterized in that: A one-way valve (17) is provided at one end of the main pipe (1) away from the internal thread cap (13).

7. The medical three-way valve according to claim 1, characterized in that: Wing plates (18) are provided on the main pipe (1). Anti-slip patterns are provided on both sides of the wing plates (18) facing away from each other.

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