CN219043062U - Medical check valve structure - Google Patents

Abstract

The utility model provides a medical check valve structure, and aims to solve the technical problems that a check valve arranged on a pressure extension tube in the prior art has poor check effect and is easy to cause cross infection. The medical check valve structure comprises: a pressure extension tube; the check valve is at least two and is connected in series with the pressure extension pipe; the check valve comprises a connecting part at two ends and a check part in the middle, the connecting part can be connected with the pressure extension pipe, a plurality of guide rods are transversely arranged in the check part, a stop plate is arranged in the middle of all the guide rods, a floating plate is movably arranged between all the guide rods, and the floating plate can cover the end part of the check part or stop on the stop plate. When the liquid flows back, the liquid flows into the non-return part from the second connecting part, the liquid can firstly impact on the floating plate, and then the floating plate is clung to the first connecting part along the tracks formed by all the guide rods, so that the non-return effect is realized.

Description

Medical check valve structure

Technical Field

The utility model relates to a medical tool, in particular to a medical check valve structure.

Background

The pressure extension tube is suitable for medical scenes such as connection of pressure monitoring pipelines, transfusion, blood transfusion diversion and the like. Since the pressure extension tube is connected to the internal environment of the human body, when the pressure extension tube is connected to the internal environment of the human body through a tool such as a needle, the liquid in the internal environment often flows back along the pressure extension tube.

Therefore, in the prior art, a check valve is usually disposed at the middle of the pressure extension tube. However, the currently used check valve still has the phenomenon of countercurrent, and cross infection and other problems are easily caused.

Disclosure of Invention

Aiming at the technical problems that the check valve arranged on the pressure extension tube in the prior art has poor check effect and is easy to cause cross infection, the utility model provides a medical check valve structure which has the advantages of good check effect and poor infection prevention.

The technical scheme of the utility model is as follows:

a medical check valve structure comprising:

a pressure extension tube;

the check valve is at least two and is connected in series with the pressure extension pipe;

the check valve comprises a connecting part at two ends and a check part in the middle, the connecting part can be connected with the pressure extension pipe, a plurality of guide rods are transversely arranged in the check part, a stop plate is arranged in the middle of all the guide rods, a floating plate is movably arranged between all the guide rods, and the floating plate can cover the end part of the check part or stop on the stop plate.

Optionally, the middle part of the floating plate is provided with a water through hole;

the connecting part close to one end of the floating plate is internally provided with a water stop plate, and after the floating plate is covered on the connecting part, the water stop plate covers the water through hole.

Optionally, the water stop plate is fixedly arranged in the connecting part by a plurality of support rods.

Optionally, both sides of the floating plate are recessed inward.

Optionally, the water stop plate is supported in the non-return part by a connecting rod and is close to the connecting part.

Optionally, the floating plate has a circular structure;

the distance between the connecting part and the stop plate is smaller than the diameter of the floating plate.

Optionally, the outline of the non-return part is olive-shaped, and the inside of the non-return part is of an outwards convex structure;

a space is arranged between the guide rod and the inner contour of the non-return part.

Optionally, the stop plate is annular, and the four circumferences of the stop plate are respectively and fixedly connected to the middle parts of all the guide rods;

the middle part of the stop plate is hollow.

Optionally, the middle part of each guide rod is respectively provided with one stop plate;

the plate surfaces of all the stop plates are positioned in the same plane, and the plane is parallel to the end surface of the connecting part.

Compared with the prior art, the utility model has the beneficial effects that:

firstly, two check valves are connected in series on the pressure extension tube, so that the check effect is improved.

In addition, a plurality of guide rods are arranged in the check valve, a movable floating plate is arranged between the guide rods, and the floating plate is close to the first connecting part. When the liquid flows back, the liquid flows into the non-return part from the second connecting part, the liquid can firstly impact on the floating plate, and then the floating plate is clung to the first connecting part along the tracks formed by all the guide rods, so that the non-return effect is realized.

In this solution, the first connection of one non-return valve is connected to the second connection of the other non-return valve, so that the two non-return valves are connected in series. Since the floating plate for stopping the flow floats in the stopping portion, the first connecting portion can be rapidly blocked when the liquid flows back. Compared with the prior mechanical linkage, the device has higher efficiency and relatively more tight plugging.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a state diagram of the present utility model;

FIG. 2 is a schematic diagram of the structure of the present utility model;

fig. 3 is a schematic perspective view of the present utility model.

Reference numerals:

10. and (5) extending the tube under pressure.

20. A non-return valve; 211. a non-return part; 212. a non-return section; 213. a first connection portion; 214. a second connecting portion; 22. a guide rod; 231. a stop plate; 232. a flow hole; 241. a floating plate; 242. a water through hole; 25. a water stop plate; 26. a support rod; 27. and a connecting rod.

30. And (5) connecting pipes.

Detailed Description

Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in various different ways without departing from the spirit or scope of the present utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships conventionally placed in use of the product of the present utility model, or orientations or positional relationships conventionally understood by those skilled in the art, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

Examples:

referring to fig. 1-3, a medical check valve structure includes a pressure extension tube 10 and a check valve 20. The pressure extension pipe 10 is connected with two check valves 20 in series, and the connection directions of the two check valves 20 are the same, that is, the check directions of the two check valves 20 are the same. The two identical non-return valves 20 can be connected by a connecting straw 30 or can be directly connected.

The check valve 20 includes a first connection portion 213, a check portion 211, a second connection portion 214, a guide rod 22, a stopper plate 231, and a floating plate 241. Specific:

the first connecting portion 213 and the second connecting portion 214 are located at both ends of the non-return portion 211, respectively. The inside of the non-return portion 211 is a hollow non-return section 212, the first connecting portion 213 and the second connecting portion 214 are hollow cylindrical structures, the inside of the first connecting portion 213 and the inside of the second connecting portion 214 are communicated with the non-return section 212, and the axis of the first connecting portion 213 is collinear with the axis of the second connecting portion 214.

The guide rods 22 are disposed in the non-return section 212, two ends of the guide rods 22 are fixedly connected to the end of the first connecting portion 213 and the end of the second connecting portion 214, respectively, and a space exists between the guide rods 22 and the inner wall of the non-return section 212. All guide rods 22 are evenly distributed around the circumference of the first connecting portion 213.

A stopper plate 231 is provided at the middle of the guide bar 22, and the stopper plate 231 extends in the axial direction of the first connecting portion 213.

The floating plate 241 is movably arranged inside the annular structure formed by all the guide rods 22, and the outer contour of the floating plate 241 is in sliding contact with the guide rods 22. And the floating plate 241 is positioned between the first connection portion 213 and the stopper plate 231, the area of the floating plate 241 near the first connection portion 213 is larger than the end surface area of the end of the first connection portion 213, and the floating plate 241 may entirely cover the end of the first connection portion 213.

The working principle of this embodiment is that two check valves 20 are connected in series on the pressure extension tube 10 first, and the check effect is increased.

When the liquid flows in the non-return portion 211 from the second connection portion 214 in a reverse direction, the liquid first impacts the floating plate 241, and then the floating plate 241 is closely attached to the first connection portion 213 along the track formed by all the guide rods 22, thereby achieving a non-return effect.

In the present embodiment, the first connection portion 213 of one check valve 20 is connected with the second connection portion 214 of the other check valve 20, thereby connecting the two check valves 20 in series. Since the floating plate 241 for stopping floats in the stopping portion 211, the first connection portion 213 can be rapidly blocked when the liquid flows back. Compared with the prior mechanical linkage, the device has higher efficiency and relatively more tight plugging.

In another specific embodiment:

the structure of the non-return valve 20 further includes a water stop plate 25, a support rod 26 and a connecting rod 27. Specific:

the floating plate 241 has a circular structure, and the diameter of the floating plate 241 is greater than the distance between the stopper plate 231 and the first connection portion 213. Both sides of the floating plate 241 are inwardly recessed, and the middle of the floating plate 241 has a water through hole 242, and the water through hole 242 is circular.

The water stop plate 25 is located in the non-return portion 211 and is close to the first connecting portion 213, the water stop plate 25 is also circular, and the diameter of the water stop plate 25 is larger than the diameter of the water through hole 242. The face of the water stop plate 25 is parallel to the end face of the first connecting portion 213, a connecting rod 27 is arranged in the middle of one side face of the water stop plate 25 away from the floating plate 241, and the connecting rod 27 is perpendicular to the face of the water stop plate 25. One end of the connecting rod 27, which is far away from the water stop plate 25, is fixedly connected with the ends of three supporting rods 26, the three supporting rods 26 are radially arranged along the radial direction of the first connecting part 213, and the axes of the first connecting part 213 are uniformly distributed along a circle. One ends of the three support rods 26, which are far away from the connecting rod 27, are fixedly connected inside the first connecting portion 213.

In this embodiment, the impact force of the liquid on the floating plate 241 can be increased by providing both side surfaces of the plate with concave structures. By providing the water passage 242 in the middle of the floating plate 241, the passage in the flow of the liquid can be made larger. When the liquid flows back, the floating plate 241 covers the end of the first connection portion 213, and the water stop plate 25 also covers the water through hole 242.

In another specific embodiment:

the outer contour of the non-return portion 211 and the inner contour of the non-return section 212 are football-shaped, so that a certain distance is provided between the guide rod 22 and the contour of the non-return section 212.

In addition, the stop plate 231 has a circular ring structure, the periphery of which is fixedly connected to the middle part of the guide rod 22, and the middle part of the water stop plate 25 is provided with a flow hole 232.

In the present embodiment, by making both the non-return portion 211 and the non-return section 212 olive-shaped, the flow space of the liquid in forward flow can be increased.

In another specific embodiment:

the outer contour of the non-return portion 211 and the inner contour of the non-return section 212 are football-shaped, so that a certain distance is provided between the guide rod 22 and the contour of the non-return section 212.

In addition, a stop plate 231 is disposed at the middle of each guide rod 22, and the extending direction of the stop plate 231 is directed to the axis of the non-return portion 211.

In the present embodiment, by making both the non-return portion 211 and the non-return section 212 olive-shaped, the flow space of the liquid in forward flow can be increased.

The foregoing examples merely illustrate specific embodiments of the utility model, which are described in greater detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims (9)

1. A medical check valve structure, comprising:

a pressure extension tube;

the check valve is at least two and is connected in series with the pressure extension pipe;

the check valve comprises a connecting part at two ends and a check part in the middle, the connecting part can be connected with the pressure extension pipe, a plurality of guide rods are transversely arranged in the check part, a stop plate is arranged in the middle of all the guide rods, a floating plate is movably arranged between all the guide rods, and the floating plate can cover the end part of the check part or stop on the stop plate.

2. The medical check valve structure according to claim 1, wherein,

the middle part of the floating plate is provided with a water through hole;

the connecting part close to one end of the floating plate is internally provided with a water stop plate, and after the floating plate is covered on the connecting part, the water stop plate covers the water through hole.

3. The medical check valve structure according to claim 2, wherein,

the water stop plate is fixedly arranged in the connecting part by a plurality of support rods.

4. The medical check valve structure according to claim 2, wherein,

both sides of the floating plate are recessed inward.

5. The medical check valve structure according to claim 4, wherein,

the water stop plate is supported in the non-return part by a connecting rod and is close to the connecting part.

6. The medical check valve structure according to claim 2, wherein,

the floating plate is of a circular structure;

the distance between the connecting part and the stop plate is smaller than the diameter of the floating plate.

7. The medical check valve structure according to claim 2, wherein,

the external contour of the non-return part is olive-shaped, and the inside of the non-return part is of an outwards convex structure;

a space is arranged between the guide rod and the inner contour of the non-return part.

8. The medical check valve structure according to claim 1, wherein,

the stop plate is annular, and the four sides of the stop plate are respectively and fixedly connected to the middle parts of all the guide rods;

the middle part of the stop plate is hollow.

9. The medical check valve structure according to claim 1, wherein,

the middle part of each guide rod is respectively provided with one stop plate;

the plate surfaces of all the stop plates are positioned in the same plane, and the plane is parallel to the end surface of the connecting part.

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