Medical three-way valve capable of continuously injecting medicine

Abstract

The utility model relates to the field of anesthesia medical instrument consumables, in particular to a medical continuous medicine injection three-way valve which comprises a shell, a base and a valve element, the valve element is assembled in the shell, a valve element guide column is arranged at one end of the valve element, a U-shaped groove is formed in the center of one end of the valve element guide column, and an annular valve element sleeve is arranged at one end of the valve element. A base guide column matched with the valve element sleeve is arranged in the center of the end, close to the valve element, of the base, the base guide column is sleeved with the valve element sleeve, an annular base lining is arranged on the edge of the base, and a valve element elastic pipe is arranged in an annular hollow cavity formed by the base lining, the base guide column and the valve element sleeve. An annular valve element sealing ring is arranged in a hollow channel formed by the end, away from the base, of the valve element and the shell. According to the medical continuous medicine injection three-way valve, the problems that a valve element of a three-way valve in the prior art is not tight in sealing, poor in rebound and deviated in rebound direction are effectively solved, and the risk that due to poor sealing, injected medicine leaks is avoided.

Description

Technical Field

[0001] The utility model relates to the field of anesthesia medical equipment consumables, in particular to a medical three-way valve capable of continuous drug injection. Background Art

[0002] In clinical practice, intraoperative and postoperative analgesia has become a common means. Currently, analgesic pumps are mostly used for continuous infusion of analgesics. When additional liquid medicine is infused during the continuous infusion of analgesics, it is usually used in conjunction with a three-way valve. Currently, one end of the three-way valve commonly used in medical clinical practice is connected to the analgesic pump body through a pipeline, and the other end is connected to the patient's vein through a pipeline, a speed control handle, etc. When additional liquid medicine is needed clinically, the liquid medicine will be infused through the upper passage of the three-way valve, which can realize the addition of liquid medicine during continuous medication.

[0003] The three-way valves currently available on the market have left, right and upper passages in their structure. The upper passage is often used as an additional drug infusion passage. Currently, in clinical practice, three-way valves have problems with poor valve core sealing and overflow of infused drug from the upper passage. In addition, after multiple injections of drugs, the valve core rebounds poorly and the rebound direction is deviated, which ultimately leads to drug leakage and causes medical safety issues. Utility Model Content

[0004] Based on this, the purpose of the utility model is to provide a medical three-way valve for continuous drug injection in response to the shortcomings of the existing technology, which effectively solves the problems of poor valve core sealing, poor valve core rebound, and deviation in rebound direction in the existing three-way valve technology, and avoids the risk of injection drug leakage due to poor sealing.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A medical three-way valve for continuous drug injection comprises an outer shell, a base and a valve core, wherein the valve core is assembled in the outer shell, a valve core guide column is provided at one end of the valve core away from the base, a U-shaped groove is provided at the center of the end of the valve core guide column away from the base, an annular valve core sleeve is provided at one end of the valve core close to the base, a base guide column matching the valve core sleeve is provided at the center of the end of the base close to the valve core, the base guide column is sleeved into the valve core sleeve, an annular base liner is provided at the edge of the base, a valve core elastic tube is provided in the annular hollow cavity formed by the base liner, the base guide column and the valve core sleeve, and an annular valve core sealing ring is provided in the hollow channel formed by the end of the valve core away from the base and the outer shell.

[0007] As a further improvement of the utility model, the end of the valve core sealing ring away from the base is provided with a valve core sealing ring groove that matches with the outer shell boss provided on the end of the Luer interface provided on the outer shell close to the valve core.

[0008] As a further improvement of the present utility model, the material of the valve core elastic tube is high-elastic silica gel, and the shape and size of the valve core elastic tube are adapted to the inner lining of the base and the valve core sleeve.

[0009] As a further improvement of the present utility model, the interior of the outer shell is a hollow cavity. One end of the outer shell is provided with a liquid inlet, the other end of the outer shell is provided with a liquid outlet, the upper end of the outer shell is provided with a Luer interface, a liquid injection port is provided on the Luer interface, and the outer surface of the upper end of the Luer interface is provided with a thread adapted to a Luer interface syringe.

[0010] As a further improvement of the present utility model, the base and the outer shell are assembled and sealed by an adhesive bonding or ultrasonic welding process.

[0011] As a further improvement of the present utility model, in the same cross-section, the height of the valve core guide post is of the overall height of the outer shell in the vertical direction, and the distance between the upper top surface of the valve core guide post 31 and the upper top surface of the outer shell 1 is 2 / 10 - 3 / 10 of the overall height of the outer shell 1 in the vertical direction.

[0012] As a further improvement of the present utility model, in the same cross-section, the height of the valve core sleeve is 1 / 6 - 1 / 5 of the overall height of the outer shell in the vertical direction, the height of the base guide post is 1 / 4 - 1 / 3 of the overall height of the outer shell in the vertical direction, and the height of the valve core elastic tube is 1 / 3 - 2 / 5 of the overall height of the outer shell in the vertical direction.

[0013] As a further improvement of the present utility model, in the same cross-section, the vertical height of the maximum allowable displacement space formed when the valve core sleeve and the base guide post cooperate is 1 / 20 - 1 / 10 of the overall height of the outer shell in the vertical direction.

[0014] As a further improvement of the present utility model, in the same cross-section, the maximum height of the cooperation between the valve core sleeve and the base guide post is equal to the original height of the valve core elastic tube, and the minimum height of the cooperation between the valve core sleeve and the base guide post is equal to the compressed height of the valve core elastic tube.

[0015] As a further improvement of the present utility model, in the same cross-section, the thickness of the valve core sealing ring is 1 / 20 - 1 / 10 of the overall height of the outer shell in the vertical direction, the width of the groove of the valve core sealing ring is 1 / 3 - 2 / 3 of the diameter of the valve core sealing ring, and the depth of the groove of the valve core sealing ring is 1 / 3 - 1 / 2 of the thickness of the valve core sealing ring.

[0016] The beneficial effects of the present utility model are:

[0017] 1. The utility model designs a groove for the valve core sealing ring, which can be closely matched with the boss on the outer shell of the three-way valve. When the valve core sealing ring is closely attached to the upper part of the three-way valve outer shell, a good sealing effect can be achieved, effectively solving the problem of drug leakage in the three-way valve.

[0018] 2. Through the close cooperation design of the lower sleeve of the three-way valve core, the guide post of the three-way valve base, and the elastic tube of the valve core, the utility model can effectively prevent the valve core of the three-way valve from shifting in position during the downward movement, and can achieve the purpose of returning to the initial position after the operation of the three-way valve core is completed.

[0019] 3. The material of the elastic tube of the valve core in the utility model is high-elastic silica gel. The shape and size of the elastic tube of the valve core are adapted to the inner lining of the base and the valve core sleeve, effectively solving the problems of poor resilience and deviation of the resilience direction of the valve core after multiple drug injections in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] FIG. Figure 1 is a schematic diagram of the overall structure of the medical continuous injection three-way valve of the present utility model.

[0022] FIG. Figure 2 is an exploded view of the overall structure of the medical continuous injection three-way valve of the present utility model.

[0023] FIG. Figure 3 is a cross-sectional view of the medical continuous injection three-way valve of the present utility model.

[0024] In the figure: 1 is the outer shell, 101 is the boss on the outer shell, 102 is the Luer interface, 103 is the liquid inlet, 104 is the liquid outlet, 105 is the injection port, 2 is the base, 201 is the base guide post, 202 is the inner lining of the base, 3 is the valve core, 31 is the valve core guide post, 3101 is the U-shaped groove, 32 is the valve core sleeve, 33 is the valve core sealing ring, 3301 is the groove of the valve core sealing ring, 34 is the elastic tube of the valve core. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] As Figure 1 , Figure 2 , Figure 3 shown, a medical continuous injection three-way valve includes a housing 1, a base 2, and a valve core 3. The valve core 3 is assembled in the housing 1. One end of the valve core 3 away from the base 2 is provided with a valve core guide post 31. The central part of the end of the valve core guide post 31 away from the base 2 is provided with a U-shaped groove 3101. One end of the valve core 3 close to the base 2 is provided with an annular valve core sleeve 32. The central part of one end of the base 2 close to the valve core 3 is provided with a base guide post 201 that cooperates with the valve core sleeve 32. The base guide post 201 is sleeved into the valve core sleeve 32. The edge part of the base 2 is provided with an annular base lining 202. A valve core elastic tube 34 is provided in the annular hollow cavity formed by the base lining 202, the base guide post 201, and the valve core sleeve 32. When the valve core elastic tube 34 is subjected to the downward pressing force of the valve core guide post 31, it presents a compressed state, and it returns to its original state when the downward pressing force of the valve core guide post 31 disappears. The function of the valve core elastic tube 34 is to realize the in-situ recovery of the valve core guide post 31 after injection. An annular valve core seal ring 33 is provided in the hollow channel formed by one end of the valve core 3 away from the base 2 and the housing 1.

[0027] In a specific embodiment, further, one end of the valve core seal ring 33 away from the base is provided with a valve core seal ring groove 3301 that cooperates with an outer housing boss 101 provided at one end of a Luer interface provided on the housing 1 close to the valve core 3.

[0028] In a specific embodiment, further, the valve core elastic tube 34 is made of high-elastic silica gel, and the shape and size of the valve core elastic tube 34 are adapted to the base lining 202 and the valve core sleeve 32.

[0029] In a specific embodiment, further, the inside of the housing 1 is a hollow cavity. One end of the housing 1 is provided with a liquid inlet 103, the other end of the housing 1 is provided with a liquid outlet 104, the upper end of the housing 1 is provided with a Luer interface 102, a liquid injection port 105 is provided on the Luer interface 102, and the outer surface of the upper end of the Luer interface 102 is provided with a thread adapted to a Luer interface syringe.

[0030] In a specific embodiment, further, the base 2 and the housing 1 are assembled and sealed by an adhesive bonding or ultrasonic welding process.

[0031] In a specific embodiment, further, within the same cross-section: the height of the valve core guide post 31 is 1 / 4 to 1 / 3 of the overall height of the housing 1 in the vertical direction, and the distance between the upper top surface of the valve core guide post 31 and the upper top surface of the housing 1 is 2 / 10 to 3 / 10 of the overall height of the housing 1 in the vertical direction. The height of the valve core sleeve 32 is 1 / 6 to 1 / 5 of the overall height of the housing 1 in the vertical direction, the height of the base guide post 201 is 1 / 4 to 1 / 3 of the overall height of the housing 1 in the vertical direction, and the height of the valve core elastic tube 34 is 1 / 3 to 2 / 5 of the overall height of the housing 1 in the vertical direction. The vertical height of the maximum allowable displacement space formed when the valve core sleeve 32 and the base guide post 201 are matched is 1 / 20 to 1 / 10 of the overall height of the housing 1 in the vertical direction. The maximum height of the cooperation between the valve core sleeve 32 and the base guide post 201 is equal to the original height of the valve core elastic tube 34, and the minimum height of the cooperation between the valve core sleeve 32 and the base guide post 201 is equal to the compressed height of the valve core elastic tube 34. The thickness of the valve core sealing ring 33 is 1 / 20 to 1 / 10 of the overall height of the housing 1 in the vertical direction, the width of the valve core sealing ring groove 3301 is 1 / 3 to 2 / 3 of the diameter of the valve core sealing ring 33, and the depth of the valve core sealing ring groove 3301 is 1 / 3 to 1 / 2 of the thickness of the valve core sealing ring 33.

[0032] The medical continuous infusion three-way valve is connected to the analgesia pump pipeline. The liquid inlet 103 and the liquid outlet 104 are used for liquid inlet and outlet respectively, and the liquid injection port 105 is closed. At this time, the medical continuous infusion three-way valve forms a passage. When additional infusion of liquid medicine is needed, the Luer interface syringe filled with liquid medicine is slowly screwed into the Luer interface 102 on the passage of the medical continuous infusion three-way valve until the injection port of the Luer interface syringe contacts the upper surface of the valve core guide post 31. Then continue to slowly screw it in. The injection port of the Luer interface syringe exerts a downward force on the upper surface of the valve core guide post 31, and the valve core guide post 31 provided on the valve core 3 moves downward. The valve core sleeve 32 moves downward along the base guide post 201, and the valve core sealing ring 33 moves downward. At this time, the Luer interface syringe is clamped with the Luer interface 102, and a gap is formed between the convex platform 101 on the outer shell and the valve core sealing ring groove 3301. The valve core elastic tube 34 deforms from its original state to a compressed state, pushing the Luer interface syringe push rod to inject liquid medicine into the liquid injection port 105 of the medical continuous three-way valve. The liquid medicine flows to the liquid outlet 104 through the U-shaped groove 3101 on the valve core guide post 31. After the liquid medicine injection is completed, the Luer interface syringe is slowly screwed out in the reverse direction. The valve core elastic tube 34 starts to recover from the compressed state. The valve core elastic tube 34 exerts an upward force on the base of the valve core guide post 31. The valve core sleeve 32 moves upward along the base guide post 201, and the valve core guide post 31 moves upward, thereby driving the valve core sealing ring 33 to move upward. The valve core elastic tube 34 deforms from the compressed state to the original state, and the gap formed between the convex platform 101 on the outer shell and the valve core sealing ring groove 3301 is closed, that is, the upper liquid injection port 105 is closed, and the medical continuous infusion three-way valve completes the liquid medicine injection work.

[0033] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those of ordinary skill in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as it meets the usage requirements, it is within the protection scope of the present invention.

[0034] Finally, it should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

Claims

1. A medical three-way valve for continuous drug injection, characterized in that: The invention comprises a housing (1), a base (2), and a valve core (3), wherein the valve core (3) is assembled in the housing (1), an end of the valve core (3) away from the base (2) is provided with a valve core guide column (31), a central portion of an end of the valve core guide column (31) away from the base (2) is provided with a U-shaped groove (3101), an end of the valve core (3) close to the base (2) is provided with an annular valve core sleeve (32), and a central portion of an end of the base (2) close to the valve core (3) is provided with a valve core sleeve (32) which is in contact with the valve core sleeve (3). The base guide column (201) is inserted into the valve core sleeve (32), the edge of the base (2) is provided with an annular base liner (202), the annular hollow cavity formed by the base liner (202), the base guide column (201) and the valve core sleeve (32) is provided with a valve core elastic tube (34), and the hollow channel formed by the end of the valve core (3) away from the base (2) and the shell (1) is provided with an annular valve core sealing ring (33).

2. The medical continuous injection three-way valve according to claim 1, characterized in that: The end of the valve core sealing ring (33) away from the base is provided with a valve core sealing ring groove (3301) which matches with a housing upper boss (101) provided on an end of the housing (1) close to the valve core (3) and provided with a Luer interface.

3. The medical continuous injection three-way valve according to claim 1, characterized in that: The material of the valve core elastic tube (34) is highly elastic silicone, and the shape and size of the valve core elastic tube (34) are compatible with the base lining (202) and the valve core sleeve (32).

4. The medical three-way valve for continuous drug injection according to any one of claims 1 to 3, characterized in that: The interior of the shell (1) is a hollow cavity; one end of the shell (1) is provided with a liquid inlet (103); the other end of the shell (1) is provided with a liquid outlet (104); the upper end of the shell (1) is provided with a Luer interface (102); the Luer interface (102) is provided with a liquid injection port (105); and the upper outer surface of the Luer interface (102) is provided with a thread compatible with a Luer interface syringe.

5. The medical three-way valve for continuous drug injection according to claim 4, characterized in that: The base (2) and the housing (1) are assembled and sealed by bonding or ultrasonic welding.

6. The medical three-way valve for continuous drug injection according to claim 1, characterized in that: In the same cross section, the height of the valve core guide column (31) is 1 / 4 to 1 / 3 of the overall height of the housing (1) in the vertical direction, and the distance between the upper top surface of the valve core guide column (31) and the upper top surface of the housing (1) is 2 / 10 to 3 / 10 of the overall height of the housing (1) in the vertical direction.

7. The medical three-way valve for continuous drug injection according to claim 1, characterized in that: In the same cross section, the height of the valve core sleeve (32) is 1 / 6 to 1 / 5 of the overall height of the housing (1) in the vertical direction, the height of the base guide column (201) is 1 / 4 to 1 / 3 of the overall height of the housing (1) in the vertical direction, and the height of the valve core elastic tube (34) is 1 / 3 to 2 / 5 of the overall height of the housing (1) in the vertical direction.

8. The medical three-way valve for continuous drug injection according to claim 1, characterized in that: In the same cross section, the vertical height of the maximum allowable displacement space formed when the valve core sleeve (32) and the base guide column (201) cooperate is 1 / 20 to 1 / 10 of the overall height of the housing (1) in the vertical direction.

9. The medical three-way valve for continuous drug injection according to claim 1, characterized in that: In the same cross section, the maximum height of the valve core sleeve (32) and the base guide column (201) is equal to the original height of the valve core elastic tube (34), and the minimum height of the valve core sleeve (32) and the base guide column (201) is equal to the compressed height of the valve core elastic tube (34).

10. The medical three-way valve for continuous drug injection according to claim 2, characterized in that: In the same cross section, the thickness of the valve core sealing ring (33) is 1 / 20 to 1 / 10 of the overall height of the housing (1) in the vertical direction, the width of the valve core sealing ring groove (3301) is 1 / 3 to 2 / 3 of the diameter of the valve core sealing ring (33), and the depth of the valve core sealing ring groove (3301) is 1 / 3 to 1 / 2 of the thickness of the valve core sealing ring (33).

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