Disposable, septum-type, backflow-preventing tee valve

Abstract

The utility model discloses a disposable separate membrane formula backflow prevention three -way valve relates to medical instrument technical field, and it is designed to solve the technical problem of the current three -way valve when not using each joint is not in the sealed state, and the air of outside carries the microorganism such as bacteria, virus and is easy to enter three -way valve and causes the inside pollution, including three -way valve body and the sealing mechanism of three -way valve body inside setting, three -way valve body includes the casing, be provided with the valve core in the casing, the casing outer surface is connected with the liquid injection connector and the liquid outlet connector, all be provided with the through -flow hole in the liquid injection connector and the liquid outlet connector, the sealing mechanism includes a plurality of array rotation setting in the sealing plate of liquid injection connector and the liquid outlet connector. The utility model has the advantages of can close the through -flow hole completely, thereby prevent the bacteria, virus and other microorganism of air carrying from entering the inside of three -way valve, avoid causing pollution to the inside of three -way valve, and then prevent the contaminated liquid medicine when using.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and more specifically, to a disposable diaphragm anti-backflow three-way valve. Background Technology

[0002] This disposable diaphragm-type anti-backflow three-way valve is primarily used in medical infusion settings. The valve body has a first port and a second port at both axial ends; one end connects to the infusion tubing, and the other connects to the patient's infusion site. An anti-backflow diaphragm is installed inside the injection connector. Under the pressure of the injected fluid, the anti-backflow diaphragm deforms and opens, effectively preventing fluid backflow and ensuring infusion safety.

[0003] Currently, disposable diaphragm-type anti-backflow three-way valves are not sealed at all joints when not in use, allowing outside air to easily enter the valve. This air can carry bacteria, viruses, and other microorganisms, contaminating the valve's interior and potentially contaminating the medication solution during use, thus increasing the risk of infection for patients. Therefore, we propose a disposable diaphragm-type anti-backflow three-way valve. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a disposable diaphragm anti-backflow three-way valve to solve the technical problem that when the current three-way valve is not in use, the various joints are not in a sealed state, and bacteria, viruses and other microorganisms carried by the outside air can easily enter the three-way valve and cause internal contamination.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a disposable diaphragm-type anti-backflow three-way valve, comprising a three-way valve body and a sealing mechanism disposed within the three-way valve body. The three-way valve body includes a housing, a valve core disposed within the housing, an injection connector and an outlet connector connected to the outer surface of the housing, an anti-backflow diaphragm disposed within the injection connector, and two outlet connectors symmetrically distributed therein. Both the injection connector and the outlet connector are provided with flow holes. The sealing mechanism includes a plurality of sealing plates rotatably disposed in an array within the injection connector and the outlet connector.

[0006] Preferably, the valve core has a three-way hole, and the valve core has an intermittently expanding annulus from the middle to the top and bottom ends, the annulus forming a stepped shape at the top and bottom ends of the valve core, and the outer surface of the valve core is provided with a rubber sealing layer.

[0007] Preferably, the upper end of the valve core is provided with a valve stem, and the upper end of the housing is provided with a through hole, through which the valve stem extends out of the housing.

[0008] Preferably, a rotary handle is installed at the upper end of the valve stem. The rotary handle is T-shaped, and an arrow groove is provided at the upper end of the rotary handle corresponding to the three-way hole.

[0009] Preferably, the flow hole is provided with a rotating groove and a receiving groove, the rotating groove and the receiving groove are connected, the inner wall of the rotating groove is provided with a spring groove corresponding to the sealing plate, a limit spring is installed in the spring groove, and the end of the limit spring is connected to the sealing plate.

[0010] Preferably, the sealing plate includes, along its long axis, a rotating part, a closing part, a pressing part, and a fitting part in sequence. The rotating part is rotatably installed in the rotating groove and has a rod-shaped structure. The closing part has a fan-shaped cross-section, and several closing parts together form a cylindrical structure. The pressing part has an arc-shaped cross-section and is fan-shaped overall. Several pressing parts together form a trumpet shape. The fitting part is located at the end of the pressing part, and the front end of the fitting part is attached to the inner wall of the receiving groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model designs a sealing plate structure. When not in use, the closed parts of several sealing plates are joined together to form a cylindrical structure, and the pressing parts are joined together to form a trumpet shape. The fitting parts are attached to the inner wall of the receiving groove, thereby sealing the flow hole and preventing outside air from entering the three-way valve. This prevents bacteria, viruses, and other microorganisms carried by the air from entering the three-way valve and avoids contamination of the three-way valve. This also prevents contamination of the medicine solution during use and prevents patients from getting infected due to infusion. In addition, the sealing plates can be automatically rotated to open during use, which facilitates the use of the three-way valve. This solves the problem that when the three-way valve is not in use, the various joints are not in a sealed state, and bacteria, viruses, and other microorganisms carried by the outside air can easily enter the three-way valve and cause internal contamination.

[0013] 2. This utility model also features a rotating handle structure. The valve core is connected to the rotating handle via the valve stem. Medical staff can easily control the rotation of the valve core by turning the T-shaped rotating handle to switch the infusion pathway. The arrow groove at the top of the rotating handle corresponds to the three-way hole of the valve core, clearly indicating the connection direction of the three-way valve, making the operation more intuitive and accurate, and effectively improving the work efficiency of medical staff.

[0014] 3. This utility model also designs a valve core structure in which the valve core has intermittently expanding annular rings from the middle to the top and bottom ends, forming a stepped shape, and a rubber sealing layer is provided on the outer surface, forming a multi-layer sealing structure with the inner wall of the housing, which can effectively prevent the leakage of medicine. Attached Figure Description

[0015] Figure 1 This is a front view structural diagram of the present utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the valve core structure of this utility model;

[0018] Figure 4 This is a first cross-sectional view of the connector of this utility model;

[0019] Figure 5 This is a second cross-sectional view of the connector of this utility model;

[0020] Figure 6 This is a schematic diagram of the sealing mechanism of this utility model;

[0021] Figure 7 This is a schematic diagram of the sealing plate structure of this utility model.

[0022] The following are the labels in the diagram: 100, Three-way valve body; 101, Housing; 102, Injection connector; 103, Outlet connector; 104, Anti-backflow separator membrane; 105, Valve core; 106, Valve stem; 107, Rotary handle; 1071, Arrow groove; 108, Flow hole; 109, Rotating groove; 110, Receiving groove; 111, Spring groove; 200, Sealing mechanism; 201, Sealing plate; 2011, Rotating part; 2012, Closing part; 2013, Squeezing part; 2014, Fitting part; 202, Limiting spring. Detailed Implementation

[0023] like Figures 1 to 7 As shown, this utility model relates to a disposable diaphragm-type anti-backflow three-way valve, including a three-way valve body 100 and a sealing mechanism 200 disposed within the three-way valve body 100. The three-way valve body 100 includes a housing 101, within which a valve core 105 is disposed. An injection connector 102 and an outlet connector 103 are connected to the outer surface of the housing 101. An anti-backflow diaphragm 104 is disposed within the injection connector 102. Two outlet connectors 103 are symmetrically distributed. Both the injection connector 102 and the outlet connector 103 are provided with flow holes 108. The sealing mechanism 200 includes several arrayed sealing plates 201 rotatably disposed within the injection connector 102 and the outlet connector 103. When not in use, this utility model's three-way valve can completely close the flow holes 108, thereby preventing airborne bacteria, viruses, and other microorganisms from entering the three-way valve and avoiding contamination of the valve's interior, thus preventing contamination of the liquid medicine during use.

[0024] Specifically, the valve core 105 has a three-way hole, and the valve core 105 has intermittently expanding annular rings from the middle to the top and bottom ends, forming a stepped shape at the top and bottom ends of the valve core 105. A rubber sealing layer is provided on the outer surface of the valve core 105. The rubber sealing layer ensures tight contact between the valve core 105 and the inner wall of the housing 101, guaranteeing its sealing performance. The stepped design of the valve core 105 forms a multi-layer sealing structure with the housing 101, further ensuring sealing performance and preventing leakage of the liquid.

[0025] Furthermore, a valve stem 106 is provided at the upper end of the valve core 105, and a through hole is provided at the upper end of the housing 101, through which the valve stem 106 extends out of the housing 101. The valve stem 106 is provided to control the valve core 105.

[0026] It is worth noting that a rotary handle 107 is installed at the upper end of the valve stem 106. The rotary handle 107 is T-shaped, and an arrow groove 1071 is provided at the upper end of the rotary handle 107 corresponding to the three-way hole. Rotating the rotary handle 107 can control which liquid outlet connector 103 the three-way hole of the valve core 105 connects to. The direction of the arrow groove 1071 indicates the connection direction of the three-way valve, which can facilitate operation by medical personnel.

[0027] It is worth noting that the flow hole 108 is provided with a rotating groove 109 and a receiving groove 110, which are connected. The inner wall of the rotating groove 109 is provided with a spring groove 111 corresponding to the sealing plate 201. A limit spring 202 is installed in the spring groove 111, and the end of the limit spring 202 is connected to the sealing plate 201. The rotating groove 109 and the receiving groove 110 are provided to accommodate the sealing plate 201 after it rotates by a certain angle. The limit spring 202 is provided to limit the sealing plate 201, so that the sealing plates 201 always remain in a mated state, thereby closing the flow hole 108.

[0028] It is worth noting that the sealing plate 201 includes, in sequence along its long axis, a rotating part 2011, a closing part 2012, a pressing part 2013, and a fitting part 2014. The rotating part 2011 is rotatably installed in the rotating groove 109 and has a rod-shaped structure. The closing part 2012 has a fan-shaped cross section, and several closing parts 2012 are joined together to form a cylindrical structure. The pressing part 2013 has an arc-shaped cross section and is fan-shaped overall. Several pressing parts 2013 are joined together to form a trumpet shape. The fitting part 2014 is located at the end of the pressing part 2013, and the front end of the fitting part 2014 is attached to the inner wall of the receiving groove 110. The closing part 2012 of the sealing plate 201 can be joined to form a cylinder, and the squeezing part 2013 can be joined to form a trumpet shape. When it is attached to the inner wall of the receiving groove 110 with the fitting part 2014, it can close the flow hole 108. When the three-way valve is not in use, it can prevent external air from entering the three-way valve and prevent bacteria, viruses and other microorganisms from entering and contaminating the inside of the three-way valve. When the three-way valve is in use, the connector of the medicine tube is inserted into the injection connector 102 and the outlet connector 103. The connector of the medicine tube can squeeze the trumpet-shaped squeezing part 2013, causing the sealing plate 201 to rotate. When the connector of the medicine tube is fully inserted into the flow hole 108, the sealing plate 201 will be located in the rotating groove 109 and the receiving groove 110.

[0029] Working principle: This embodiment provides a disposable diaphragm-type anti-backflow three-way valve. When not in use, the sealing plates 201 inside the injection connector 102 and the outlet connector 103 are in a closed state under the action of the limiting spring 202. The closing parts 2012 of several sealing plates 201 are joined to form a cylindrical structure, the squeezing parts 2013 are joined to form a trumpet shape, and the fitting parts 2014 are fitted to the inner wall of the receiving groove 110, thereby sealing the flow hole 108, preventing outside air from entering the three-way valve, and preventing bacteria, viruses and other microorganisms from affecting the valve. The three-way valve becomes contaminated inside. When using the three-way valve for intravenous infusion, the connector of the drug solution tube is inserted into the infusion connector 102 and the outlet connector 103 respectively. During the insertion of the drug solution tube connector, the squeezing part 2013 of the sealing plate 201 is squeezed. Since the rotating part 2011 is rotatably installed in the rotating groove 109, the sealing plate 201 rotates after being squeezed, gradually opening the flow hole 108. When the drug solution tube connector is fully inserted into the flow hole 108, the sealing plate 201 rotates completely and is stored in the rotating groove 109 and the receiving groove 11. Within 0, the flow hole 108 is unobstructed, allowing for liquid transfer. When switching channels, rotating the handle 107 drives the valve stem 106 to rotate, which in turn controls the valve core 105 to rotate. The valve core 105 has a three-way hole with intermittently expanding annular sections from the middle to the top and bottom, forming a stepped shape. The rubber sealing layer on the outer surface ensures a seal with the inner wall of the housing 101. The handle 107 is T-shaped, with an arrow groove 1071 at its upper end corresponding to the three-way hole, indicating the connection direction of the three-way valve. When the handle 107 rotates... The three-way hole of the valve core 105 is connected to different liquid outlet connectors 103, thereby realizing the switching of infusion channels and allowing the medicine to flow to the pipeline connected to different liquid outlet connectors 103. When the injection operation is performed, the pressure of the medicine acts on the anti-backflow separator 104, causing it to deform and open the channel, allowing the medicine to flow smoothly into the three-way valve. When the injection stops or there is a tendency for liquid backflow, the anti-backflow separator 104 returns to its original shape under the action of its own elastic change, blocking the channel, preventing liquid backflow, and ensuring infusion safety.

[0030] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A disposable diaphragm-type anti-backflow three-way valve, characterized in that, The device includes a three-way valve body (100) and a sealing mechanism (200) disposed within the three-way valve body (100). The three-way valve body (100) includes a housing (101), a valve core (105) disposed within the housing (101), an injection connector (102) and an outlet connector (103) connected to the outer surface of the housing (101), an anti-backflow separator membrane (104) disposed within the injection connector (102), and two outlet connectors (103) symmetrically distributed. Both the injection connector (102) and the outlet connector (103) are provided with flow holes (108). The sealing mechanism (200) includes several sealing plates (201) arranged in an array and rotatably disposed within the injection connector (102) and the outlet connector (103).

2. The disposable diaphragm-type anti-backflow three-way valve according to claim 1, characterized in that, The valve core (105) has a three-way hole. The valve core (105) has an intermittently expanding ring from the middle to the upper and lower ends. The ring forms a stepped shape at the upper and lower ends of the valve core (105). The outer surface of the valve core (105) is provided with a rubber sealing layer.

3. The disposable diaphragm-type anti-backflow three-way valve according to claim 2, characterized in that, The upper end of the valve core (105) is provided with a valve stem (106), and the upper end of the housing (101) is provided with a through hole, and the valve stem (106) extends out of the housing (101) from the through hole.

4. A disposable diaphragm-type anti-backflow three-way valve according to claim 3, characterized in that, A rotating handle (107) is installed at the upper end of the valve stem (106). The rotating handle (107) is T-shaped, and an arrow groove (1071) is opened at the upper end of the rotating handle (107) corresponding to the three-way hole.

5. A disposable diaphragm-type anti-backflow three-way valve according to claim 4, characterized in that, The flow hole (108) is provided with a rotating groove (109) and a receiving groove (110), which are connected. The inner wall of the rotating groove (109) is provided with a spring groove (111) corresponding to the sealing plate (201). A limit spring (202) is installed in the spring groove (111), and the end of the limit spring (202) is connected to the sealing plate (201).

6. A disposable diaphragm-type anti-backflow three-way valve according to claim 5, characterized in that, The sealing plate (201) includes, along its long axis, a rotating part (2011), a closing part (2012), a pressing part (2013), and a fitting part (2014). The rotating part (2011) is rotatably installed in the rotating groove (109). The rotating part (2011) is a rod-shaped structure. The closing part (2012) has a fan-shaped cross-section. Several closing parts (2012) are joined together to form a cylindrical structure. The pressing part (2013) has an arc-shaped cross-section. The pressing part (2013) is fan-shaped overall. Several pressing parts (2013) are joined together to form a trumpet shape. The fitting part (2014) is located at the end of the pressing part (2013). The front end of the fitting part (2014) is attached to the inner wall of the receiving groove (110).

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