Anti-backflow static therapy infusion device control valve

Abstract

The utility model discloses a kind of anti-backflow blood static therapy infusion device control valve, it is related to infusion device technical field, the utility model includes drip pot, drip pot inside is equipped with control valve assembly;Flow guide pipe, flow guide pipe upper end is communicated with drip pot bottom end, and flow guide pipe lower end is communicated and is equipped with transition pipe;Wherein, control valve assembly includes the hollow valve stem being set in the inside of drip pot, hollow valve stem bottom end is fixedly connected with lower sealing plate.The utility model discloses a kind of anti-backflow blood static therapy infusion device control valve, under the action of gravity, lower sealing plate and drip pot bottom opening are covered, valve block moves into lower infusion pipe, further blocks air into human blood vessel inside through lower infusion pipe and forms backflow phenomenon, and by the valve block of being set in, it is sealed in lower infusion pipe inside, then when drip pot is in inclined state, its valve block is still completely matched with lower infusion pipe inside cavity mouth, then air leakage phenomenon does not appear, and structure design is humanized.

Description

Technical Field

[0001] This utility model relates to the field of infusion set technology, and in particular to a control valve for an anti-backflow intravenous infusion set. Background Technology

[0002] Existing technology typically involves installing a valve stem inside the drip chamber of the infusion set. The buoyancy of the valve stem automatically blocks the infusion port inside the drip chamber, preventing air from entering the blood vessel and avoiding backflow. However, this design has certain limitations in practical applications.

[0003] The core problem with existing anti-backflow technology is that the valve stem can only completely seal the infusion port when the drip chamber is completely vertical, relying on its buoyancy. If the drip chamber is tilted, the end of the valve stem will also tilt, preventing a complete seal at the infusion port. In this tilted state, the valve stem cannot effectively prevent air from entering the blood vessel, easily causing backflow and thus affecting the effectiveness and safety of intravenous therapy. Therefore, improvements to the existing device are necessary. Utility Model Content

[0004] The purpose of this invention is to provide a control valve for an anti-backflow intravenous infusion set to solve the problems mentioned in the background art.

[0005] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0006] A control valve for an anti-backflow intravenous infusion set, comprising:

[0007] A dripper, wherein a control valve assembly is provided inside the dripper;

[0008] A flow guide tube, the upper end of which is connected to the bottom end of the drip pot, and a transition tube connected to the lower end of which;

[0009] The control valve assembly includes a hollow valve stem disposed inside the drip pot. A lower sealing plate is fixedly connected to the bottom end of the hollow valve stem. A connecting rod disposed inside the guide tube and the transition tube is fixedly connected to the bottom wall of the lower sealing plate. A valve block is fixedly connected to the bottom end of the connecting rod.

[0010] Preferably, the upper end of the drip chamber is connected to an upper infusion tube.

[0011] Preferably, the bottom end of the transition tube is connected to a lower infusion tube.

[0012] Preferably, an upper sealing plate is fixedly connected to the upper end of the hollow valve stem, and a guide rod is fixedly connected to the upper wall of the upper sealing plate.

[0013] Preferably, the outer diameter of the guide rod is smaller than the inner diameter of the upper infusion tube.

[0014] Preferably, the outer diameter of the connecting rod is smaller than the inner diameter of the guide tube, the inner diameter of the transition tube is larger than the inner diameter of the guide tube and the inner diameter of the lower infusion tube, and the outer diameter of the valve block is the same as the inner diameter of the lower infusion tube.

[0015] Compared with the prior art, this utility model has the following advantages:

[0016] Under the influence of gravity, the lower sealing plate covers the bottom opening of the drip chamber, and the valve block moves downward into the lower infusion tube, further preventing air from entering the blood vessels and causing backflow. The valve block is also designed to seal the inside of the lower infusion tube. Even when the drip chamber is tilted, the valve block remains fully fitted with the inner cavity of the lower infusion tube, preventing air leakage. The design is user-friendly. Attached Figure Description

[0017] Figure 1 A schematic diagram of the internal structure of a control valve for an anti-backflow intravenous infusion set during infusion.

[0018] Figure 2 This is a schematic diagram of the internal structure of a control valve for an anti-backflow intravenous infusion set in the non-infusion state.

[0019] In the diagram: 1. Drip pot; 2. Upper infusion tube; 3. Guide tube; 4. Transition tube; 5. Lower infusion tube; 6. Hollow valve stem; 7. Lower sealing plate; 8. Connecting rod; 9. Valve block; 10. Upper sealing plate; 11. Guide rod. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1:

[0022] Please see Figures 1-2 As shown, this utility model is a control valve for an anti-backflow intravenous infusion set, including...

[0023] A dripper 1, wherein a control valve assembly is provided inside the dripper 1;

[0024] The upper end of the guide tube 3 is connected to the bottom end of the drip pot 1, and the lower end of the guide tube 3 is connected to a transition tube 4;

[0025] The control valve assembly includes a hollow valve stem 6 disposed inside the dripper 1. A lower sealing plate 7 is fixedly connected to the bottom end of the hollow valve stem 6. A connecting rod 8 disposed inside the guide pipe 3 and the transition pipe 4 is fixedly connected to the bottom wall of the lower sealing plate 7. A valve block 9 is fixedly connected to the bottom end of the connecting rod 8.

[0026] The upper end of the drip pot 1 is connected to an upper infusion tube 2.

[0027] The bottom end of the transition tube 4 is connected to a lower infusion tube 5.

[0028] The outer diameter of the connecting rod 8 is smaller than the inner diameter of the guide tube 3, the inner diameter of the transition tube 4 is larger than the inner diameter of the guide tube 3 and the inner diameter of the lower infusion tube 5, and the outer diameter of the valve block 9 is the same as the inner diameter of the lower infusion tube 5.

[0029] The outer diameter of valve block 9 should be smaller than the inner diameter of transition pipe 4.

[0030] As can be seen from the above, during infusion, the drip chamber 1 contains liquid. Furthermore, the hollow valve stem 6 inside moves upward under the action of buoyancy, which in turn drives the connecting rod 8 and the valve block 9 to move upward. At this time, the lower sealing plate 7 no longer contacts and seals with the inner bottom wall of the drip chamber 1, and the valve block 9 moves into the transition tube 4. The outer diameter of the valve block 9 is smaller than the inner diameter of the transition tube 4. Furthermore, the liquid inside the drip chamber 1 is connected and infused through the lower infusion tube 5 under the action of gravity.

[0031] Specifically, when there is no liquid inside the dripping pot 1, the hollow valve stem 6 is no longer subject to buoyancy. Under the action of gravity, the lower sealing plate 7 covers the bottom opening of the dripping pot 1, and the valve block 9 moves down into the lower infusion tube 5, further preventing air from entering the human blood vessels through the lower infusion tube 5 and forming a blood return phenomenon. The structural design is humane.

[0032] Furthermore, the valve block 9 is designed to fit and seal inside the lower infusion tube 5. Therefore, even when the dripping pot 1 is tilted, the valve block 9 still fits perfectly inside the lower infusion tube 5, preventing any air leakage. This design is user-friendly.

[0033] Example 2:

[0034] A dripper 1, wherein a control valve assembly is provided inside the dripper 1;

[0035] The upper end of the guide tube 3 is connected to the bottom end of the drip pot 1, and the lower end of the guide tube 3 is connected to a transition tube 4;

[0036] The control valve assembly includes a hollow valve stem 6 disposed inside the dripper 1. A lower sealing plate 7 is fixedly connected to the bottom end of the hollow valve stem 6. A connecting rod 8 disposed inside the guide pipe 3 and the transition pipe 4 is fixedly connected to the bottom wall of the lower sealing plate 7. A valve block 9 is fixedly connected to the bottom end of the connecting rod 8.

[0037] Depend on Figure 1 and Figure 2 It can be seen that the upper end of the hollow valve stem 6 is fixedly connected to the upper sealing plate 10, and the upper wall of the upper sealing plate 10 is fixedly connected to the guide rod 11.

[0038] The outer diameter of the guide rod 11 should be smaller than the inner diameter of the upper infusion tube 2.

[0039] As can be seen from the above, by setting the upper sealing plate 10 and the guide rod 11, when the hollow valve rod 6 moves upward under the action of buoyancy, the guide rod 11 further enters the interior of the upper infusion tube 2, which plays a guiding and limiting role. The structural design is user-friendly.

[0040] All standard parts used in this utility model can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment all adopt conventional models in the prior art, and will not be described in detail here. The contents not described in detail in this specification are all prior art known to those skilled in the art.

[0041] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. "A plurality of" means two or more, unless otherwise explicitly specified.

[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0043] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0045] The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A control valve for an anti-backflow intravenous infusion set, characterized in that: include A drip pot (1), wherein a control valve assembly is provided inside the drip pot (1); The upper end of the guide tube (3) is connected to the bottom end of the dripper (1), and the lower end of the guide tube (3) is connected to a transition tube (4); The control valve assembly includes a hollow valve stem (6) disposed inside the dripper (1), a lower sealing plate (7) fixedly connected to the bottom end of the hollow valve stem (6), a connecting rod (8) disposed inside the guide pipe (3) and the transition pipe (4) fixedly connected to the bottom wall of the lower sealing plate (7), and a valve block (9) fixedly connected to the bottom end of the connecting rod (8).

2. The control valve for an anti-backflow intravenous infusion set according to claim 1, characterized in that: The upper end of the drip pot (1) is connected to an upper infusion tube (2).

3. The control valve for an anti-backflow intravenous infusion set according to claim 1, characterized in that: The bottom end of the transition tube (4) is connected to a lower infusion tube (5).

4. The control valve for an anti-backflow intravenous infusion set according to claim 1, characterized in that: The upper end of the hollow valve stem (6) is fixedly connected to an upper sealing plate (10), and a guide rod (11) is fixedly connected to the upper wall of the upper sealing plate (10).

5. The control valve for an anti-backflow intravenous infusion set according to claim 4, characterized in that: The outer diameter of the guide rod (11) is smaller than the inner diameter of the upper infusion tube (2).

6. The control valve for an anti-backflow intravenous infusion set according to claim 1, characterized in that: The outer diameter of the connecting rod (8) is smaller than the inner diameter of the guide tube (3), the inner diameter of the transition tube (4) is larger than the inner diameter of the guide tube (3) and the inner diameter of the lower infusion tube (5), and the outer diameter of the valve block (9) is the same as the inner diameter of the lower infusion tube (5).

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