Medical anti-reflux device

Abstract

The utility model relates to a medical anti-regurgitation device which comprises a valve body and an anti-regurgitation cap, the valve body is provided with a liquid storage cavity, a liquid inlet cavity channel and a liquid outlet cavity channel, the liquid inlet cavity channel and the liquid outlet cavity channel are arranged at two opposite ends of the liquid storage cavity and are communicated with the liquid storage cavity, and the valve body is further provided with a liquid inlet port communicated with the liquid inlet cavity channel. The liquid outlet port is communicated with the liquid outlet cavity channel; the anti-reflux cap is elastically and movably arranged in the liquid storage cavity and is arranged at the tail end of the liquid inlet channel; when liquid flows from the liquid inlet port to the liquid outlet port, the anti-backflow cap moves in the direction away from the liquid inlet port under the pressure of the liquid, so that communication between the liquid inlet cavity channel and the liquid storage cavity is opened. When the pressure in the liquid outlet cavity channel is larger than that in the liquid inlet cavity channel, the anti-backflow cap moves towards the liquid inlet cavity channel to abut against the end wall corresponding to the liquid inlet cavity channel under the pressure of liquid in the liquid outlet cavity channel so as to seal the tail end of the liquid inlet cavity channel.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a medical anti-reflux device. Background Art

[0002] Catheter drainage is widely used in clinical practice to remove pus, blood, and tissue fluid from the patient's body cavity to reduce inflammation, infection, or other complications. Patients with diseases such as hydrocephalus, hypertensive cerebral hemorrhage, pleural effusion, and abdominal effusion often need to wear drainage tubes for a long time during or after surgery. Due to changes in the patient's body position, the fluid in the effusion bag has reflux and cross-flow phenomena. These problems bring great inconvenience to doctors' operations and also reduce the efficiency of catheter drainage to a certain extent. Utility Model Content

[0003] Based on this, it is necessary to provide a medical anti-reflux device to address the technical problem that drainage devices in the prior art are prone to cause backflow and cross-flow.

[0004] A medical anti-reflux device, comprising:

[0005] A valve body, wherein the valve body is configured with a liquid storage cavity, and a liquid inlet cavity and a liquid outlet cavity which are arranged at opposite ends of the liquid storage cavity and communicated with the liquid storage cavity, and the valve body is also provided with a liquid inlet port which communicates with the liquid inlet cavity, and a liquid outlet port which communicates with the liquid outlet cavity;

[0006] An anti-reflux cap is elastically and movably disposed in the liquid storage cavity and at the tail end of the liquid inlet cavity;

[0007] Wherein, when the liquid flows from the liquid inlet port to the liquid outlet port, the anti-backflow cap moves in the direction away from the liquid inlet port under the pressure of the liquid to open the connection between the liquid inlet cavity and the liquid storage cavity; when the pressure in the liquid outlet cavity is greater than the pressure in the liquid inlet cavity, the anti-backflow cap moves in the direction of the liquid inlet cavity under the pressure of the liquid in the liquid outlet cavity until it abuts against the end wall corresponding to the liquid inlet cavity to seal the tail end of the liquid inlet cavity.

[0008] In one embodiment, the liquid inlet channel includes:

[0009] The first sub-liquid inlet channel is constructed as a straight channel;

[0010] The second sub-liquid inlet cavity has a cavity wall structure corresponding to the cavity wall being a circular arc surface;

[0011] The third sub-liquid inlet channel is constructed as a straight channel;

[0012] Wherein, the diameter of the second sub-liquid inlet channel gradually decreases from an end facing the first sub-liquid inlet channel to an end close to the third sub-liquid inlet channel.

[0013] In one embodiment, the outer side wall corresponding to the third sub-liquid inlet channel extends into the liquid storage cavity.

[0014] In one embodiment, the medical anti-reflux device further comprises:

[0015] The base is elastically connected to the anti-backflow cap, the base is fixed in the liquid storage cavity and fits with the end surface of the tail end of the liquid outlet cavity, and there is a gap between the base and the anti-backflow cap.

[0016] In one embodiment, the base is constructed as an annular structure, and the base is sleeved on the outer side wall corresponding to the third sub-liquid inlet cavity.

[0017] In one of the embodiments, at least one connecting block is provided at one end of the anti-backflow cap facing the base, the connecting block is fixedly connected to the base, and the connecting block is elastically deformable.

[0018] In one embodiment, the outer end surface corresponding to the third sub-liquid inlet channel is configured as a spherical surface, and the end surface of the anti-backflow cap facing the liquid inlet channel is configured as a spherical concave surface to fit with the end surface of the tail end of the liquid inlet channel.

[0019] In one embodiment, the diameter of the end surface of the anti-backflow cap facing the third sub-liquid inlet channel is larger than the diameter of the end surface of the spherical surface of the first sub-liquid inlet channel facing the anti-backflow cap.

[0020] In one embodiment, the liquid outlet channel includes:

[0021] The first sub-liquid outlet channel is constructed as a straight channel;

[0022] A second sub-liquid outlet channel, wherein the side wall corresponding to the second sub-liquid outlet channel is constructed as a conical surface, and the diameter of one end of the second sub-liquid outlet channel connected to the liquid storage chamber is larger than the diameter of one end of the second sub-liquid outlet channel connected to the first sub-liquid outlet channel.

[0023] In one of the embodiments, barbed connector structures are provided on the outer circumferential surfaces of both ends of the valve body to connect with corresponding pipelines.

[0024] Beneficial effects of the utility model:

[0025] The utility model provides a medical anti-backflow device, which is provided with a liquid storage cavity on a valve body, and a liquid inlet cavity and a liquid outlet cavity connected to the liquid storage cavity are provided at opposite ends of the liquid storage cavity, as well as a liquid inlet port connected to the liquid inlet cavity and a liquid outlet port connected to the liquid storage cavity, so that drainage liquid enters the liquid inlet cavity from the liquid inlet port and flows into the liquid outlet cavity through the liquid outlet cavity, and is discharged from the liquid outlet port. In the utility model, the anti-backflow cap is elastically movably arranged in the liquid storage cavity and at the tail end of the liquid inlet cavity, so that when the drainage liquid moves from the liquid inlet port to the direction of the liquid outlet port, at this time, the pressure of the drainage liquid in the liquid inlet cavity is greater than the pressure of the liquid in the liquid storage cavity and the liquid in the liquid storage cavity, and the drainage liquid pushes the anti-backflow cap open, so that there is a gap between the anti-backflow cap and the tail end of the liquid inlet cavity, so that the drainage liquid flows into the liquid storage cavity and is discharged from the liquid outlet port. When the fluid pressure in the outlet cavity is greater than the fluid pressure in the inlet cavity during drainage, the anti-reflux cap moves toward the inlet cavity under the action of the fluid pressure in the liquid storage cavity, so that the anti-reflux cap fits with the tail end of the inlet cavity, thereby preventing the drainage fluid in the liquid storage cavity from flowing back into the inlet cavity. This provides a better anti-reflux effect during drainage. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A cross-sectional view of a medical anti-reflux device provided by an embodiment of the utility model during normal use;

[0027] Figure 2 A cross-sectional view of a medical anti-reflux device provided by an embodiment of the utility model during anti-reflux operation;

[0028] Figure 3 This is an assembly effect diagram of a medical anti-reflux device provided in one embodiment of the utility model.

[0029] Reference numerals:

[0030] Valve body 100; liquid storage chamber 110; liquid inlet channel 120; first sub-liquid inlet channel 121; second sub-liquid inlet channel 122; third sub-liquid inlet channel 123; liquid outlet channel 130; first sub-liquid outlet channel 131; second sub-liquid outlet channel 132; liquid inlet port 140; liquid outlet port 150; barb-mounted joint structure 160; anti-backflow cap 200; base 300. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0037] See also Figures 1 to 3 The utility model provides a medical anti-reflux device in one embodiment, which includes a valve body 100 and an anti-reflux cap 200. The valve body 100 is configured with a liquid storage chamber 110, and a liquid inlet channel 120 and a liquid outlet channel 130 which are arranged at opposite ends of the liquid storage chamber 110 and communicate with the liquid storage chamber 110. The valve body 100 is also provided with a liquid inlet port 140 which communicates with the liquid inlet channel 120, and a liquid outlet port 150 which communicates with the liquid outlet channel 130. The anti-reflux cap 200 is elastically movably arranged in the liquid storage chamber 110 and arranged at the inlet port 140. The tail end of the liquid cavity channel 120; wherein, when the liquid flows from the liquid inlet port 140 to the liquid outlet port 150, the anti-backflow cap 200 moves in the direction away from the liquid inlet port 140 under the pressure of the liquid to open the connection between the liquid inlet cavity 120 and the liquid storage cavity 110; when the pressure in the liquid outlet cavity 130 is greater than the pressure in the liquid inlet cavity 120, the anti-backflow cap 200 moves in the direction of the liquid inlet cavity 120 under the pressure of the liquid in the liquid outlet cavity 130 until it abuts against the end wall corresponding to the liquid inlet cavity 120 to seal the tail end of the liquid inlet cavity 120.

[0038] The present technical solution provides a medical anti-backflow device, which is provided with a liquid storage chamber 110 on a valve body 100, and a liquid inlet channel 120 and a liquid outlet channel 130 connected to the liquid storage chamber 110 are provided at opposite ends of the liquid storage chamber 110, as well as a liquid inlet port 140 connected to the liquid inlet channel 120, and a liquid outlet port 150 connected to the liquid storage chamber 110, so that the drainage liquid enters the liquid inlet channel 120 from the liquid inlet port 140 and flows into the liquid outlet channel 130 through the liquid outlet chamber, and is then discharged from the liquid outlet port 150. In the utility model, the anti-backflow cap 200 is elastically movably arranged in the liquid storage chamber 110 and at the tail end of the liquid inlet channel 120, so that when the drainage liquid moves from the liquid inlet port 140 to the liquid outlet port 150, at this time, the pressure of the drainage liquid in the liquid inlet channel 120 is greater than the pressure of the liquid in the liquid storage chamber 110 and the liquid in the liquid storage chamber 110, and the drainage liquid pushes the anti-backflow cap 200 open, so that there is a gap between the anti-backflow cap 200 and the tail end of the liquid inlet channel 120, thereby facilitating the drainage liquid to flow into the liquid storage chamber 110 so as to be discharged from the liquid outlet port 150. When the fluid pressure in the liquid outlet channel 130 is greater than the fluid pressure in the liquid inlet channel 120 during the drainage process, the anti-reflux cap 200 moves toward the liquid inlet channel 120 under the action of the fluid pressure in the liquid storage chamber 110, so that the anti-reflux cap 200 fits with the tail end of the liquid inlet channel 120, thereby preventing the drainage fluid in the liquid storage chamber 110 from flowing back into the liquid inlet channel 120. This provides a better anti-reflux effect during the drainage process.

[0039] like Figures 1 to 3 As shown, in one embodiment, the liquid inlet channel 120 includes a first sub-liquid inlet channel 121, a second sub-liquid inlet channel 122 and a third sub-liquid inlet channel 123 which are connected in sequence, the first sub-liquid inlet channel 121 is constructed as a straight channel; the cavity wall corresponding to the second sub-liquid inlet channel 122 is constructed as an arc surface; the third sub-liquid inlet channel 123 is constructed as a straight channel; wherein the diameter of the second sub-liquid inlet channel 122 gradually decreases from one end facing the first sub-liquid inlet channel 121 to one end close to the third sub-liquid inlet channel 123.

[0040] Through the above structure, the diameter of the liquid inlet channel 120 is stepped and gradually changed, so that the diameter at the end close to the liquid storage chamber 110 can be smaller, so that the pressure of the drainage liquid when entering the liquid storage chamber 110 is greater, which is conducive to pushing open the anti-reflux cap 200.

[0041] like Figures 1 to 3As shown, in one embodiment, the outer side wall corresponding to the third sub-liquid inlet channel 123 extends into the liquid storage chamber 110. The outer side wall corresponding to the third sub-liquid inlet channel 123 is extended into the liquid storage chamber 110, so that the anti-reflux cap 200 can fit with the outer side wall corresponding to the third sub-liquid inlet channel 123 when preventing reflux, so as to seal the port of the third sub-liquid inlet channel 120, thereby preventing the drainage liquid from flowing back or flowing in series.

[0042] like Figures 1 to 3 As shown, in one embodiment, the medical anti-reflux device also includes a base 300, the anti-reflux cap 200 is elastically connected to the base 300, the base 300 is fixed in the liquid storage cavity 110 and fits with the end face of the tail end of the liquid outlet cavity 130, and there is a gap between the base 300 and the anti-reflux cap 200.

[0043] The anti-reflux cap 200 is elastically connected to the base 300 so as to be arranged in the liquid storage chamber 110. A gap is provided between the base 300 and the anti-reflux cap 200 so as to allow the refluxed liquid to flow into the liquid storage chamber 110 through the gap between the anti-reflux cap 200 and the base 300.

[0044] Specifically, there is no limitation on the connection method between the anti-backflow cap 200 and the base 300 , and a spring may be provided between the base 300 and the anti-backflow cap 200 , and the elastic connection between the two may be achieved through the elastic deformation of the spring.

[0045] like Figures 1 to 3 As shown, in one embodiment, at least one connection block is provided at one end of the anti-reflux cap 200 facing the base 300, and the connection block is fixedly connected to the base 300, and the connection block can be elastically deformed. In this embodiment, by setting the connection block to be elastically deformable, the anti-reflux cap 200 can be adaptively moved under the pressure of different sides, thereby realizing a normal drainage function or an anti-reflux function.

[0046] Specifically, the base 300 is constructed as an annular structure, and the base 300 is sleeved on the outer wall corresponding to the third sub-liquid inlet channel 123. The base 300 is sleeved on the outer wall corresponding to the first liquid inlet channel 120, so that the structure of the whole device is simpler, and it is also convenient to install and fix the base 300.

[0047] More specifically, the outer end surface corresponding to the third sub-liquid inlet channel 123 is configured as a spherical surface, and the end surface of the anti-reflux cap 200 facing the liquid inlet channel 120 is configured as a spherical concave surface to fit with the end surface of the tail end of the liquid inlet channel 120. By setting the outer end surface corresponding to the third sub-liquid inlet channel 123 as a spherical surface and setting the entire surface of the anti-reflux cap 200 facing the liquid inlet channel 120 as a spherical concave surface, it is beneficial to achieve the matching of the outer end surface corresponding to the anti-reflux cap 200 and the third sub-liquid inlet channel, thereby improving the anti-reflux effect.

[0048] like Figures 1 to 3 As shown, further, the diameter of the end surface of the anti-backflow cap 200 facing one end of the third sub-liquid inlet channel is greater than the diameter of the end surface of the spherical surface of the first sub-liquid inlet channel 121 facing one end of the anti-backflow cap 200. In this way, the anti-backflow cap 200 can seal the port at one end of the third sub-liquid inlet channel, thereby improving the anti-backflow effect.

[0049] like Figures 1 to 3 As shown, in one embodiment, the liquid outlet channel 130 includes a first sub-liquid outlet channel 131 and a second liquid outlet channel 130 which are connected in sequence, and the first sub-liquid outlet channel 131 is configured as a straight channel; the side wall corresponding to the second sub-liquid outlet channel 132 is configured as a conical surface, and the diameter of the end of the second sub-liquid outlet channel 132 connected to the liquid storage chamber 110 is larger than the diameter of the end of the second sub-liquid outlet channel 132 connected to the first sub-liquid outlet channel 131. This arrangement is used to reduce the diameter of the port of the second sub-liquid outlet channel 132, so as to facilitate connection with the corresponding pipeline to achieve the discharge of drainage liquid.

[0050] like Figures 1 to 3 As shown, in one embodiment, the outer circumferential surfaces of both ends of the valve body 100 are provided with barb-shaped connector structures to connect with the corresponding pipeline. By providing the barb-shaped connector structures at both ends of the valve body 100, the connection and fixation between the valve body 100 and the pipeline can be realized, thereby ensuring the reliability of the connection between the medical anti-reflux device and the pipeline.

[0051] The working principle of the medical anti-reflux device provided by the utility model is as follows:

[0052] like Figure 1 As shown, when the medical anti-reflux device is used normally, the drained liquid enters the device along the liquid inlet port 140 of the valve body 100. Since the liquid pressure of the drained liquid in the liquid inlet channels 120 on both sides of the anti-reflux cap is greater than the liquid pressure of the drained liquid in the liquid storage chamber 110, the drained liquid pushes open the anti-reflux cap through the terminal outlet of the liquid inlet channel 120 and enters the liquid storage chamber 110 of the valve body 100, and then is discharged from the valve body 100 through the liquid outlet port 150.

[0053] like Figure 2As shown, when the liquid pressure of the liquid outlet port 150 of the valve body 100 is greater than or equal to the liquid pressure of the liquid inlet port 140, the drained liquid in the liquid outlet cavity 130 of the valve body 100 pushes the anti-reflux cap to fit the terminal outlet of the liquid inlet cavity 120 due to the pressure difference, thereby preventing the drained liquid from the liquid storage cavity 110 from flowing back to the liquid inlet cavity 120 of the valve body 100. At this time, the liquid inlet cavity 120 of the valve body 100 is isolated from the liquid storage cavity 110, thereby avoiding the occurrence of backflow and cross-flow of the drained liquid.

[0054] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A medical anti-reflux device, characterized in that: The medical anti-reflux device comprises: A valve body, wherein the valve body is configured with a liquid storage cavity, and a liquid inlet cavity and a liquid outlet cavity which are arranged at opposite ends of the liquid storage cavity and communicated with the liquid storage cavity, and the valve body is also provided with a liquid inlet port which communicates with the liquid inlet cavity, and a liquid outlet port which communicates with the liquid outlet cavity; An anti-reflux cap is elastically and movably disposed in the liquid storage cavity and at the tail end of the liquid inlet cavity; Wherein, when the liquid flows from the liquid inlet port to the liquid outlet port, the anti-backflow cap moves in the direction away from the liquid inlet port under the pressure of the liquid to open the connection between the liquid inlet cavity and the liquid storage cavity; when the pressure in the liquid outlet cavity is greater than the pressure in the liquid inlet cavity, the anti-backflow cap moves in the direction of the liquid inlet cavity under the pressure of the liquid in the liquid outlet cavity until it abuts against the end wall corresponding to the liquid inlet cavity to seal the tail end of the liquid inlet cavity.

2. The medical anti-reflux device according to claim 1, characterized in that: The liquid inlet channel includes: The first sub-liquid inlet channel is constructed as a straight channel; The second sub-liquid inlet cavity has a cavity wall structure corresponding to the cavity wall being a circular arc surface; The third sub-liquid inlet channel is constructed as a straight channel; Wherein, the diameter of the second sub-liquid inlet channel gradually decreases from an end facing the first sub-liquid inlet channel to an end close to the third sub-liquid inlet channel.

3. The medical anti-reflux device according to claim 2, characterized in that: The outer side wall corresponding to the third sub-liquid inlet channel extends into the liquid storage cavity.

4. The medical anti-reflux device according to claim 3, characterized in that: The medical anti-reflux device also includes: The base is elastically connected to the anti-backflow cap, the base is fixed in the liquid storage cavity and fits with the end surface of the tail end of the liquid outlet cavity, and there is a gap between the base and the anti-backflow cap.

5. The medical anti-reflux device according to claim 4, characterized in that: The base is constructed as an annular structure, and the base is sleeved on the outer side wall corresponding to the third sub-liquid inlet cavity.

6. The medical anti-reflux device according to claim 4, characterized in that: At least one connecting block is disposed at one end of the anti-backflow cap facing the base. The connecting block is fixedly connected to the base and is elastically deformable.

7. The medical anti-reflux device according to claim 3, characterized in that: The outer end surface corresponding to the third sub-liquid inlet cavity is configured as a spherical surface, and the end surface of the anti-backflow cap facing the liquid inlet cavity is configured as a spherical concave surface to fit with the end surface of the tail end of the liquid inlet cavity.

8. The medical anti-reflux device according to claim 7, characterized in that: The diameter of the end surface of the anti-backflow cap facing the third sub-liquid inlet cavity is larger than the diameter of the end surface of the spherical surface of the first sub-liquid inlet cavity facing the anti-backflow cap.

9. The medical anti-reflux device according to any one of claims 1 to 8, characterized in that: The liquid outlet channel includes: The first sub-liquid outlet channel is constructed as a straight channel; A second sub-liquid outlet channel, wherein the side wall corresponding to the second sub-liquid outlet channel is constructed as a conical surface, and the diameter of one end of the second sub-liquid outlet channel connected to the liquid storage chamber is larger than the diameter of one end of the second sub-liquid outlet channel connected to the first sub-liquid outlet channel.

10. The medical anti-reflux device according to any one of claims 1 to 8, characterized in that: The outer circumferential surfaces of both ends of the valve body are provided with barb-mounted joint structures for connecting with corresponding pipelines.

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