Leakage-proof medical three-way plug valve

Abstract

The utility model discloses an anti-leakage medical three-way plug valve, which belongs to the technical field of medical instruments and comprises a valve body, a valve core, a rotating seat and an injection part fixedly arranged right above the rotating seat, a valve rod is connected right below the rotating seat and inserted into the valve body, the valve core is arranged in the middle of the valve rod, and the valve core is arranged in the middle of the valve rod. The valve element is provided with three circulation channels communicating with one another. A liquid conveying channel is formed in the middle of the length direction of the valve rod in a mode of penetrating through the rotating seat, and the liquid conveying channel penetrates through the valve rod to be communicated with the upper end of the junction of the three circulation channels on the valve element. The infusion valve has the advantages that the infusion channel is formed in the center of the valve rod, the infusion channel is connected with the upper end of the junction of the three circulation channels formed in the valve element, operation can be conducted only through the injection part, and covers at the other input ends do not need to be opened any more; the pollution risk caused by repeatedly unscrewing the cover at the other input ends is avoided, meanwhile, a dosing channel is added to the tee joint, and the usability of the three-way plug valve is enhanced.

Description

Technical Field

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

[0002] A plug valve is a rotary valve in the shape of a closing piece or a plunger. It is a valve that can be opened or closed by rotating the valve plug 90 degrees to make the channel opening of the valve plug the same as or separate from the channel opening on the valve body. The shape of the valve plug of the plug valve can be cylindrical or conical. The plug valve is most suitable for cutting off and connecting media and for diversion, but it can sometimes be used for throttling according to the applicable properties and the erosion resistance of the sealing surface. The plug valve can simplify the design of the pipeline system, reduce the amount of valves used, and some connection accessories required in the equipment.

[0003] As an important part of medical equipment, the medical three-way stopcock has multiple functions such as flow control, medium switching and connection coordination. By rotating the valve core, the flow and pressure of the fluid can be accurately adjusted, which is convenient for medical staff to perform treatment processes such as infusion and blood transfusion according to the needs of patients. The accuracy of flow control is crucial to the treatment effect and safety of patients. The application of medical three-way stopcock can achieve accurate flow regulation to meet different treatment needs; when medical equipment needs to switch different media or liquids, the medical three-way stopcock can connect different pipes by rotating the valve core to achieve liquid cutting and switching. For example, in the operating room, the medical three-way stopcock can be used to switch different drug delivery to ensure accurate drug delivery and control during surgery. It can connect different pipes or equipment to achieve liquid delivery and diversion. Through proper connection, the medical three-way stopcock facilitates the installation and use of medical equipment and improves the flexibility and adaptability of the equipment. In addition, the medical three-way stopcock is also used in conjunction with other components to ensure the normal operation of the equipment and the smooth flow of fluids.

[0004] The three-way stopcock has two input ends and one output end. It can be connected to an infusion line for multi-channel liquid infusion or clinical drug administration. The traditional three-way stopcock is in a fully open state, and the infusion liquid is selected by the valve knob. When the stopcock valve is opened, the liquid can flow freely out of the infusion channel. The traditional three-way stopcock is in a fully open state and can flow freely under pressure between the three ports. If the cap of one input end is accidentally opened, the closure of the infusion pipeline may be affected, resulting in accidental leakage of infusion and blood, polluting the environment or causing accidental blood loss in patients. At the same time, external gas may also enter the infusion channel to cause gas embolism, etc., which brings certain risks to patients. At the same time, if drug administration is required through the three-way, it is necessary to unscrew the input end cap and insert the syringe into the input end for drug administration.

[0005] Some patents of medical three-way stopcocks are disclosed in the prior art, among which the utility model patent with the announcement number CN201939882U discloses a medical three-way stopcock, including a three-way body connected to each other and a control valve arranged at the center of the three-way body, two ports of the three-way body are provided with connecting nuts, and the other port is provided with an external thread matching the size of the connecting nut. Although the technical problem of being applicable to invasive monitoring of perioperative anesthesia and postoperative dual-channel analgesia, reducing instrument requirements, simplifying operating procedures, and reducing surgical investment has been solved, there is still the problem that the cap of a certain input end is accidentally opened, resulting in the closure of the infusion pipeline being affected, resulting in infusion, accidental leakage of blood, and accidental blood loss in patients when serious, and external gas may also enter the infusion channel to cause gas embolism and other problems.

[0006] In view of this, the inventor conducted in-depth research on the need to avoid valve body leakage during infusion, resulting in accidental leakage of infusion or blood, and to facilitate the injection of drugs, which led to the present case. Utility Model Content

[0007] In order to overcome the problems in the prior art of preventing the valve body from leaking during infusion, leading to accidental leakage of infusion or blood, and facilitating the injection of drugs, the utility model provides a leakage-proof medical three-way stopcock valve, comprising a valve body, a valve core, a rotating seat, and an injection portion fixedly arranged directly above the rotating seat, a valve stem fixedly connected directly below the rotating seat, the valve stem being inserted into the interior of the valve body, the valve core being arranged in the middle of the valve stem, and three mutually connected flow channels being opened on the valve core;

[0008] An infusion channel is opened through the rotating seat in the middle of the length direction of the valve stem, and the infusion channel passes through the valve stem and is connected to the upper end of the confluence of the three flow channels on the valve core.

[0009] An injection part is adopted directly above the rotating seat, an infusion channel is opened at the center position of the valve stem, and the infusion channel is connected to the upper end part where the three circulation channels opened on the valve core meet. If it is necessary to perform drug administration through the three-way valve, it is only necessary to operate through the injection part and there is no need to open the covers of the other input ends. This ensures that the administered medicine can enter the infusion fluid smoothly, and there is no leakage of infusion fluid during the operation, which facilitates infusion and avoids the risk of contamination caused by repeatedly twisting open the covers of the other input ends. At the same time, a drug administration channel is added to the three-way valve, thereby enhancing the usability of the three-way stopcock valve.

[0010] Furthermore, the valve body includes a base body and three connecting pipes. An installation cavity is opened inside the base body, and the installation cavity is communicated with the inner cavity of the connecting pipes. The valve core is installed in the installation cavity and the valve core is interference fit with the side wall of the installation cavity.

[0011] Through the above technical solution, an installation cavity is opened on the base body, which makes the installation of the base body and the valve core more convenient, and can prevent leakage of the three-way stopcock during infusion to a great extent, and can also ensure that the connection does not fall off and leakage occurs under high pressure.

[0012] Furthermore, an annular limiting clamp ring is fixedly provided on the free end of the valve stem, a positioning groove is provided on the inner side wall of the installation cavity corresponding to the limiting clamp ring, and the limiting clamp ring rotates with the valve stem and is clamped on the positioning groove in the installation cavity.

[0013] Through the above technical solution, the relative position of the valve core and the base body is limited by the clamping cooperation of the positioning groove and the limit clamp ring, so as to avoid excessive pressure in the three-way stopcock valve, which may cause a large gap between the valve core and the base body and lead to leakage of liquid medicine.

[0014] Furthermore, the injection part includes an extension tube, which is fixedly connected to the upper end of the infusion channel. The upper end of the extension tube is provided with an injection port, and the inner side of the extension tube near the injection port is provided with a first one-way valve flap. The flow direction of the first one-way valve is from the injection port to the inside of the infusion channel, and the upper end of the injection port is provided with a cap.

[0015] Through the above technical solution, a first one-way valve flap is arranged in the extension tube at the lower end of the injection port, and the upper port is provided with a protective cover outside the input end. After opening the protective cover, the drug can be directly administered to the injection port through the syringe, thereby ensuring that the drug can smoothly enter the infusion solution without leakage, and avoiding the risk of contamination caused by repeatedly twisting open the covers of the other input ends.

[0016] Furthermore, the three connecting pipes include two input ends and one output end, and the input ends are each provided with a second one-way valve flap, the flow direction of the second one-way valve is from the output end to the inside of the valve core, and the two input ends are adjacently arranged.

[0017] Through the above technical solution, a one-way valve flap structure is added to the input end to change the fully open state of the traditional three-way stopcock, thereby ensuring that the liquid flow direction in the three-way stopcock can only flow from the input end to the output end, avoiding infusion and blood leakage caused by accidental opening of the input end. At this time, due to the existence of the one-way valve flap, external gas cannot push open the one-way valve flap, thereby avoiding the occurrence of external air accidentally entering the infusion channel.

[0018] Furthermore, the input port is connected to a locking cover, and the output port is sequentially connected to a rotary joint and a protective cap.

[0019] Furthermore, the axes of the two connecting pipes overlap with each other and are perpendicular to the axis of the other connecting pipe, the three connecting pipes are distributed in a "T" shape, and the three circulation channels are distributed in the same manner as the connecting pipes.

[0020] Through the above technical solution, the "T"-shaped connecting pipes and circulation channels can realize the diversion or mixing of the drug solution, which can not only realize the switching of the medium flow direction, but also make the three channels interconnected, and can also close any channel and connect the other two channels.

[0021] Furthermore, sealing gaskets are provided at the upper and lower ends of the valve core, the sealing gasket and the valve core are tightly fitted, and the central axis of the valve core coincides with the central axis of the gasket.

[0022] Through the above technical solution, the structure can be further stabilized and more uniform through the effect of the sealing gasket.

[0023] Furthermore, a flow direction mark for indicating the flow direction is arranged on the surface of the rotating seat, and the flow direction mark includes an indicating arrow and a closing prompt, and the indicating arrow is arranged on a side of the closing prompt away from the valve core.

[0024] Furthermore, the base body is made of medical-grade polycarbonate material, and the base body is set to be colorless and transparent.

[0025] Through the above technical solution, the base of the three-way stopcock is set to be colorless and transparent, which makes it convenient for medical staff to observe the flow of the drug solution in the three-way base.

[0026] Beneficial effects:

[0027] The beneficial effects produced by adopting the technical solution of the utility model are as follows:

[0028] (1) An injection part is arranged just above the rotating seat, an infusion channel is opened at the center of the valve stem, and the infusion channel is connected to the upper end of the junction of the three flow channels opened on the valve core. If a drug administration operation needs to be performed through the three-way valve, it is only necessary to operate through the injection part and there is no need to open the covers of the other input ends. This ensures that the administered drug can smoothly enter the infusion fluid, and the infusion fluid will not leak during the operation, which facilitates infusion and avoids the risk of contamination caused by repeatedly twisting open the covers of the other input ends. At the same time, a drug administration channel is added to the three-way valve, thereby enhancing the usability of the three-way stopcock.

[0029] (2) An installation cavity is provided on the base body to facilitate the installation of the base body and the valve core, thereby preventing leakage of the three-way stopcock during infusion to a great extent and ensuring that no connection falls off or leakage occurs under high pressure. The relative position of the valve core and the base body is limited by the positioning groove and the limit clamp ring, thereby preventing excessive pressure in the three-way stopcock from causing a large gap between the valve core and the base body and causing leakage of the liquid medicine.

[0030] (3) A one-way valve flap structure is added to the input end to change the fully open state of the traditional three-way stopcock, thereby ensuring that the liquid in the three-way stopcock can only flow from the input end to the output end, avoiding infusion and blood leakage caused by accidental opening of the input end. At this time, due to the presence of the one-way valve flap, external gas cannot push open the one-way valve flap, avoiding the occurrence of external air accidentally entering the infusion channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a structural schematic diagram of a leakage-proof medical three-way stopcock of the utility model;

[0033] Figure 2 This is a schematic diagram of the exploded structure of a leakage-proof medical three-way stopcock of the utility model;

[0034] Figure 3 It is a cross-sectional view of a leakage-proof medical three-way stopcock of the utility model;

[0035] In the figure, 1. valve body; 2. valve core; 3. rotating seat; 4. injection part; 5. valve stem; 6. circulation channel; 7. infusion channel; 8. base body; 9. limit clamp; 10. extension tube; 11. injection port; 12. first one-way valve flap; 13. cover cap; 14. second one-way valve flap; 15. locking cover; 16. rotating joint; 17. protective cap; 18. sealing gasket. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0037] This embodiment adopts an injection part directly above the rotating seat, opens an infusion channel at the center of the valve stem, and connects the infusion channel to the upper end where the three circulation channels opened on the valve core meet. It only needs to operate through the injection part and no longer needs to open the covers of the other input ends, avoiding the risk of contamination caused by repeatedly twisting the covers of the other input ends. At the same time, a drug delivery channel is added to the three-way stopcock, enhancing the usability of the three-way stopcock. The specific implementation is as follows:

[0038] like Figure 1-3 As shown, a leakage-proof medical three-way stopcock valve comprises a valve body 1, a valve core 2, a rotating seat 3 and an injection portion 4 fixedly arranged just above the rotating seat 3, a valve stem 5 is fixedly connected just below the rotating seat 3, the valve stem 5 is inserted into the valve body 1, the valve core 2 is arranged in the middle of the valve stem 5, and three mutually connected flow channels 6 are opened on the valve core 2;

[0039] A liquid infusion channel 7 is opened through the rotating seat 3 in the middle of the length direction of the valve stem 5 . The liquid infusion channel 7 passes through the valve stem 5 and is connected to the upper end of the confluence of three flow channels 6 on the valve core 2 .

[0040] Here, an injection part 4 is arranged just above the rotating seat 3, an infusion channel 7 is opened at the center position of the valve stem 5, and the infusion channel 7 is connected to the upper end portion where the three circulation channels 6 opened on the valve core 2 meet. If a drug administration operation needs to be performed through the three-way valve, it is only necessary to operate through the injection part 4 and there is no need to open the covers of the other input ends. This ensures that the administered drug can smoothly enter the infusion fluid, and no leakage of the infusion fluid will be caused during the operation, thereby avoiding the risk of contamination caused by repeatedly twisting open the covers of the other input ends. At the same time, a drug administration channel is added to the three-way valve, thereby enhancing the usability of the three-way stopcock.

[0041] As a preferred embodiment, the valve body 1 includes a base body 8 and three connecting pipes. An installation cavity is opened inside the base body 8, and the installation cavity is connected to the inner cavity of the connecting pipe. The valve core 2 is installed in the installation cavity and the valve core 2 has an interference fit with the side wall of the installation cavity.

[0042] Here, an installation cavity is provided on the base body 8, so that the installation of the base body 8 and the valve core 2 is more convenient, which can prevent leakage of the three-way stopcock during infusion to a great extent, and can also ensure that no connection falls off and leakage occurs under high pressure.

[0043] As a preferred embodiment, a ring-shaped limit clamp 9 is fixedly provided at the free end of the valve stem 5, and a positioning groove is provided on the inner wall of the installation cavity corresponding to the limit clamp 9. The limit clamp 9 rotates with the valve stem 5 and is clamped in the positioning groove in the installation cavity.

[0044] Here, the relative position of the valve core 2 and the base body 8 is limited by the engagement of the positioning groove and the limit clamp ring 9, so as to avoid excessive pressure in the three-way stopcock valve, which may cause a large gap between the valve core 2 and the base body 8 and lead to leakage of the liquid medicine.

[0045] As a preferred embodiment, the injection part 4 includes an extension tube 10, which is fixedly connected to the upper end of the infusion channel 7. An injection port 11 is provided at the upper end of the extension tube 10. A first one-way valve flap 12 is provided on the inner side of the extension tube 10 near the injection port 11. The flow direction of the first one-way valve is from the injection port 11 to the inside of the infusion channel 7. A cap 13 is provided at the upper end of the injection port 11.

[0046] Here, a first one-way valve flap 12 is arranged in the extension tube 10 at the lower end of the injection port 11, and a protective cover is arranged on the upper port outside the input end. After opening the protective cover, the drug can be directly administered to the injection port 11 through the syringe, ensuring that the drug can smoothly enter the infusion fluid without leakage, and avoiding the risk of contamination caused by repeatedly twisting open the covers of the other input ends.

[0047] As a preferred embodiment, the three connecting pipes include two input ends and one output end, and the input ends are each provided with a second one-way valve flap 14, the flow direction of the second one-way valve is from the output end to the inside of the valve core 2, and the two input ends are adjacently arranged.

[0048] Here, a one-way valve flap structure is added to the input end to change the fully open state of the traditional three-way stopcock, thereby ensuring that the liquid flow direction in the three-way stopcock can only flow from the input end to the output end, avoiding infusion and blood leakage caused by accidental opening of the input end. At this time, due to the existence of the one-way valve flap, external gas cannot push open the one-way valve flap, avoiding the occurrence of external air accidentally entering the infusion channel 7.

[0049] As a preferred embodiment, a locking cover 15 is connected to the input port, and a rotary joint 16 and a protective cap 17 are sequentially connected to the output port.

[0050] As a preferred embodiment, the axes of the two connecting pipes coincide with each other and are perpendicular to the axis of the other connecting pipe, the three channels are distributed in a "T" shape, and the distribution of the three flow channels 6 is consistent with that of the connecting pipes.

[0051] Here, the "T"-shaped connecting pipes and the circulation channel 6 can realize the diversion or mixing of the liquid medicine, which can not only realize the switching of the medium flow direction, but also make the three channels interconnected, and can also close any channel and connect the other two channels.

[0052] As a preferred embodiment, sealing gaskets 18 are provided at the upper and lower ends of the valve core 2. The sealing gasket 18 and the valve core 2 are tightly fitted, and the central axis of the valve core 2 coincides with the central axis of the gasket.

[0053] Here, the sealing gasket 18 can further stabilize the structure and make it more uniform.

[0054] As a preferred embodiment, a flow direction mark for indicating the flow direction is arranged on the surface of the rotating seat 3 , and the flow direction mark includes an indicating arrow and a closing prompt, and the indicating arrow is arranged on the side of the closing prompt away from the valve core 2 .

[0055] As a preferred embodiment, the base body 8 is made of medical-grade polycarbonate material, and the base body 8 is colorless and transparent.

[0056] Here, the base of the three-way stopcock is set to be colorless and transparent, which makes it easy for medical staff to observe the flow of the liquid medicine in the three-way base.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A leak-proof medical three-way stopcock, characterized in that: The valve body (1) comprises a valve core (2), a rotating seat (3), and an injection portion (4) fixedly arranged directly above the rotating seat (3); a valve stem (5) is fixedly connected directly below the rotating seat (3); the valve stem (5) is inserted into the interior of the valve body (1); the valve core (2) is arranged in the middle of the valve stem (5); and three mutually connected flow channels (6) are opened on the valve core (2); A liquid infusion channel (7) is provided through the rotating seat (3) in the middle of the length direction of the valve stem (5), and the liquid infusion channel (7) passes through the valve stem (5) and is connected to the upper end of the confluence of the three circulation channels (6) on the valve core (2).

2. The anti-leakage medical three-way stopcock according to claim 1, characterized in that: The valve body (1) comprises a base body (8) and three connecting pipes. An installation cavity is provided inside the base body (8), and the installation cavity is communicated with the inner cavity of the connecting pipes. The valve core (2) is installed in the installation cavity, and the valve core (2) is interference fit with the side wall of the installation cavity.

3. The anti-leakage medical three-way stopcock according to claim 2, characterized in that: An annular limiting snap ring (9) is fixedly provided at the free end of the valve stem (5); a positioning slot is provided on the inner side wall of the installation cavity corresponding to the limiting snap ring (9); the limiting snap ring (9) rotates with the valve stem (5) and is clamped on the positioning slot in the installation cavity.

4. The anti-leakage medical three-way stopcock according to claim 1, characterized in that: The injection portion (4) comprises an extension tube (10), wherein the extension tube (10) is fixedly connected to the upper end of the infusion channel (7), an injection port (11) is provided at the upper end of the extension tube (10), a first one-way valve flap (12) is provided on the inner side of the extension tube (10) near the injection port (11), the flow direction of the first one-way valve flap is from the injection port (11) to the inside of the infusion channel (7), and a cap (13) is provided at the upper end of the injection port (11).

5. The anti-leakage medical three-way stopcock according to claim 2, characterized in that: The three connecting pipes include two input ends and one output end, and the input ends are each provided with a second one-way valve flap (14). The flow direction of the second one-way valve flap is from the output end to the inside of the valve core (2), and the two input ends are adjacently arranged.

6. The anti-leakage medical three-way stopcock according to claim 5, characterized in that: The input port is connected to a locking cover (15), and the output port is sequentially connected to a rotary joint (16) and a protective cap (17).

7. The anti-leakage medical three-way stopcock according to claim 2, characterized in that: The axes of the two connecting pipes overlap with each other and are perpendicular to the axis of the other connecting pipe. The three connecting pipes are distributed in a "T" shape, and the three circulation channels (6) are distributed in the same manner as the connecting pipes.

8. The anti-leakage medical three-way stopcock according to claim 1, characterized in that: Sealing gaskets (18) are provided at the upper and lower ends of the valve core (2); the sealing gasket (18) and the valve core (2) are tightly fitted, and the central axis of the valve core (2) coincides with the central axis of the gasket.

9. The anti-leakage medical three-way stopcock according to claim 1, characterized in that: A flow direction mark for indicating the flow direction is arranged on the surface of the rotating seat (3), the flow direction mark comprising an indicating arrow and a closing prompt, and the indicating arrow is arranged on a side of the closing prompt away from the valve core (2).

10. The anti-leakage medical three-way stopcock according to claim 2, characterized in that: The base body (8) is made of medical-grade polycarbonate material, and the base body (8) is colorless and transparent.

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