Medical three-way valve

Abstract

The utility model discloses a medical three-way valve, which belongs to the technical field of medical appliances and comprises a valve body, a valve core is rotatably connected in the valve body, the top end of the valve core penetrates to the upper side of the valve body, two liquid inlet connectors and a liquid outlet connector are fixedly connected to the circumferential surface of the valve body, and the two liquid inlet connectors and the liquid outlet connector are communicated with the valve body. A three-channel valve hole is formed in the circumferential surface of the valve element, the three-channel valve hole and the center axis of the two liquid inlet connecting ports and the center axis of the liquid outlet connecting port are located on the same horizontal plane, placing ports are formed in the two ends of the valve element, and elastic tensioning rings are arranged in the two placing ports. According to the medical three-way valve, the two elastic tensioning rings tension the valve element in the two placing openings through the elasticity of the elastic tensioning rings, so that the circumferential surface of the valve element is supported and tightly attached to the circumferential inner wall of the valve body, the sealing effect of the upper side and the lower side of the three-way valve hole is improved, and therefore the sealing performance of the whole medical three-way valve during liquid medicine conveying is guaranteed; and liquid medicine leakage caused by a gap generated between the valve body and the valve element is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field more specifically, relate to a kind of medical three-way valve. BACKGROUND

[0002] Medical three-way valve is a commonly used infusion connecting device, usually composed of valve body, valve core and connecting port, widely used in clinical medical environment to control the direction of liquid flow, by rotating valve core to switch the conducting or closed state of each connecting port on valve body to realize the delivery and control of single or multiple liquid medicine and start or end infusion treatment, which provides convenience and safety for medical staff.

[0003] At present, medical three-way valve is used for liquid injection, and the delivery and mixing of liquid in the channel need to be controlled by valve core, but most of the existing medical three-way valves are usually plastic parts, and plastic products generally have shrinkage and other shaping defects due to material properties and processing methods, so that gaps are easily generated on the mating surface of valve body and valve core after they are assembled into three-way valve, which reduces the sealing performance and causes leakage during liquid delivery. Therefore, the utility model provides a medical three-way valve. UTILITY MODEL CONTENT

[0004] 1. TECHNICAL PROBLEM TO BE SOLVED

[0005] In view of the problems in the prior art, the utility model aims to provide a medical three-way valve, which solves the problem that the existing medical three-way valve is usually a plastic part, and the plastic product generally has shrinkage and other shaping defects due to material properties and processing methods, so that gaps are easily generated on the mating surface of valve body and valve core after they are assembled into three-way valve, which reduces the sealing performance and causes leakage during liquid delivery.

[0006] 2. TECHNICAL SCHEME

[0007] To solve the above problems, the utility model adopts the following technical scheme:

[0008] A medical three-way valve, comprising a valve body, a valve core is rotatably connected in the valve body, and the top end of the valve core penetrates to the upper side of the valve body, the circumferential surface of the valve body is fixedly connected with two liquid inlet connecting ports and a liquid outlet connecting port, and the two liquid inlet connecting ports and the liquid outlet connecting port are in communication with the valve body, a three-channel valve hole is formed in the circumferential surface of the valve core, and the center axes of the three-channel valve hole, the two liquid inlet connecting ports and the liquid outlet connecting port are located on the same horizontal plane, a receiving port is formed at each end of the valve core, an elastic expansion ring is arranged in each receiving port, and the two elastic expansion rings are located on the upper and lower sides of the three-channel valve hole respectively.

[0009] As one preferred scheme of the utility model, the circumferential inner wall of the valve body is provided with a clamping groove, the circumferential surface of the valve core is fixedly connected with a protrusion, and the protrusion is located in the clamping groove.

[0010] As one preferred scheme of the utility model, the top end of the valve core is fixedly connected with three flow direction marks, and the three flow direction marks correspond to the two liquid inlet connecting ports and the liquid outlet connecting port.

[0011] As one preferred scheme of the utility model, the two liquid inlet connecting ports are provided with connecting threads at the ends away from the valve body, and the two connecting threads correspond to the input ends of the two liquid inlet connecting ports respectively.

[0012] 3. Beneficial effects

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] (1) In the scheme, the two liquid inlet connecting ports are used for the input of the liquid medicine, the liquid outlet connecting port is used for the output of the liquid medicine, the position of the three-channel valve hole is adjusted by rotating the valve core to control the conduction of the two liquid inlet connecting ports and the liquid outlet connecting port, the two elastic tension rings are installed at the two placing ports at the upper and lower ends of the valve core, the two elastic tension rings are tensioned to the valve core by the elastic force of the two elastic tension rings in the two placing ports, the circumferential surface of the valve core is supported to tightly adhere to the circumferential inner wall of the valve body, the sealing effect of the upper and lower sides of the three-channel valve hole is improved, the sealing property of the whole medical three-way valve when conveying the liquid medicine is guaranteed, and the gap between the valve body and the valve core is prevented to cause the leakage of the liquid medicine. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the front view of the utility model;

[0016] Figure 2 It is the top view of the utility model;

[0017] Figure 3 It is the front sectional view of the utility model;

[0018] Figure 4 It is the side sectional view of the utility model;

[0019] Figure 5 It is the explosion view of the utility model.

[0020] Explanation of reference numerals in the drawing:

[0021] 1, valve body; 2, valve core; 3, liquid inlet connecting port; 4, liquid outlet connecting port; 5, three-channel valve hole; 6, placing port; 7, elastic tension ring; 8, clamping groove; 9, protrusion; 10, flow direction mark; 11, connecting thread. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0023] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be understood in a broad sense. For example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be internal communication of two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] Embodiment:

[0026] Please refer to Figures 1-5 A medical three-way valve, comprising a valve body 1, a valve core 2 is rotatably connected in the valve body 1, and the top end of the valve core 2 penetrates to the upper side of the valve body 1, the circumferential surface of the valve body 1 is fixedly connected with two liquid inlet connecting ports 3 and liquid outlet connecting ports 4, and the two liquid inlet connecting ports 3 and liquid outlet connecting ports 4 are all communicated with the valve body 1, the circumferential surface of the valve core 2 is provided with a three-way valve hole 5, and the center axes of the two liquid inlet connecting ports 3 and liquid outlet connecting ports 4 are located on the same horizontal plane, both ends of the valve core 2 are provided with a placing port 6, two elastic expansion rings 7 are arranged in the two placing ports 6, and the two elastic expansion rings 7 are located on the upper and lower sides of the three-way valve hole 5 respectively.

[0027] In this embodiment, two accommodating openings 6 are used to accommodate two elastic expansion rings 7, the valve core 2 is placed from the top opening of the valve body 1 to be rotatably installed, so that the three-way valve hole 5 corresponds to the two liquid inlet connecting openings 3 and the liquid outlet connecting openings 4, the two liquid inlet connecting openings 3 and the liquid outlet connecting openings 4 transport the liquid medicine through the three-way valve hole 5, the position of the three-way valve hole 5 is adjusted by rotating the valve core 2, so that the conduction of the two liquid inlet connecting openings 3 and the liquid outlet connecting openings 4 when transporting the liquid medicine can be controlled, and the elastic expansion rings 7 in the two accommodating openings 6 apply the elastic force of the elastic expansion rings 7 to the valve core 2, so that the circumferential surface of the valve core 2 is always tightly attached to the circumferential inner wall of the valve body 1, thereby ensuring the sealing performance of the two liquid inlet connecting openings 3 and the liquid outlet connecting openings 4 when transporting the liquid medicine through the three-way valve hole 5.

[0028] Specifically, the circumferential inner wall of the valve body 1 is provided with a clamping groove 8, and the circumferential surface of the valve core 2 is fixedly connected with a protrusion 9, and the protrusion 9 is located in the clamping groove 8.

[0029] In this embodiment, the valve core 2 is pressed into the valve body 1, so that the protrusion 9 is elastically clamped into the clamping groove 8, thereby limiting the valve core 2, so that the valve core 2 can stably rotate in the valve body 1 to control the conduction of the liquid medicine, and prevent the valve core 2 from being separated from the valve body 1.

[0030] Specifically, the top end of the valve core 2 is fixedly connected with three flow direction marks 10, and the three flow direction marks 10 correspond to the two liquid inlet connecting openings 3 and the liquid outlet connecting openings 4.

[0031] In this embodiment, the three flow direction marks 10 are conduction marks of the two liquid inlet connecting openings 3 and the liquid outlet connecting openings 4, which facilitate medical staff to judge the use state of the three-way valve.

[0032] Specifically, the ends of the two liquid inlet connecting openings 3 away from the valve body 1 are provided with connecting threads 11, and the two connecting threads 11 correspond to the input ends of the two liquid inlet connecting openings 3, respectively.

[0033] In this embodiment, the connecting threads 11 are used to connect the pipelines for injecting and inputting the liquid medicine, and the connecting threads 11 can also connect sealing caps to prevent impurities from entering the two liquid inlet connecting openings 3 when not in use.

[0034] Working principle: when the medical three-way valve is used, different types of liquid medicine injected and inputted enter the three-way valve hole 5 through the two liquid inlet connecting openings 3, the corresponding position of the three-way valve hole 5 is controlled by rotating the valve core 2, so that the two liquid inlet connecting openings 3 and the liquid outlet connecting openings 4 can be opened and closed accordingly, so that the liquid medicine can be outputted from the liquid outlet connecting openings 4 according to the actual demand, and during the use of the valve core 2 in the valve body 1, the two elastic expansion rings 7 in the two accommodating openings 6 make the circumferential surface of the valve core 2 tightly attached to the circumferential inner wall of the valve body 1 through the elasticity of the elastic expansion rings 7, so that the two liquid inlet connecting openings 3 and the liquid outlet connecting openings 4 maintain good sealing performance when transporting the liquid medicine through the three-way valve hole 5.

[0035] The above merely describes a preferred embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art, according to the technical scheme and the improvement concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A medical three-way valve comprising a valve body (1), characterized in that: The valve body (1) is rotatably connected with a valve core (2), and the top end of the valve core (2) penetrates to the upper side of the valve body (1), the circumferential surface of the valve body (1) is fixedly connected with two liquid inlet connecting ports (3) and a liquid outlet connecting port (4), and the two liquid inlet connecting ports (3) and the liquid outlet connecting port (4) are all in communication with the valve body (1), the circumferential surface of the valve core (2) is provided with a three-channel valve hole (5), and the center axes of the two liquid inlet connecting ports (3) and the liquid outlet connecting port (4) are located on the same horizontal plane, both ends of the valve core (2) are provided with a placing port (6), and the two placing ports (6) are all provided with an elastic expansion ring (7), and the two elastic expansion rings (7) are located on the upper and lower sides of the three-channel valve hole (5) respectively.

2. The medical three-way valve according to claim 1, characterized in that: The circumferential inner wall of the valve body (1) is provided with a clamping groove (8), and the circumferential surface of the valve core (2) is fixedly connected with a protrusion (9), and the protrusion (9) is located in the clamping groove (8).

3. A medical three-way valve according to claim 2, characterized in that: The top end of the valve core (2) is fixedly connected with three flow direction marks (10), and the three flow direction marks (10) correspond to the two liquid inlet connecting ports (3) and the liquid outlet connecting port (4).

4. A medical three-way valve according to claim 3, characterized in that: The ends of the two liquid inlet connecting ports (3) away from the valve body (1) are all provided with connecting threads (11), and the two connecting threads (11) correspond to the input ends of the two liquid inlet connecting ports (3) respectively.

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