Medical check valve

Abstract

The utility model discloses a medical check valve which structurally comprises an outer plug shell, an extension head, an access port, an arc-shaped body, a middle pipe and an outlet head, the middle pipe and the outer plug shell are of an integrated structure, the access port is communicated with the space of the middle pipe, the arc-shaped body is arranged between the access port and the middle pipe, the access port and the extension head are of an integrated structure, and the outlet head and the lower end of the outer plug shell are installed, buckled and fixed. The extension head and the outer plug shell are integrally produced to reduce burrs, the connecting-out head, the middle pipe and the connecting-in opening can be communicated in space, the outer plug shell and the connecting-out head are integrally and mainly of a circular structure, the left end and the right end of an arc-shaped body are fixed to the inner surface of the outer plug shell, the outer plug shell and the connecting-out head are tightly buckled and sleeved, and the arc-shaped body can be arranged at the connecting-in opening and the middle pipe. The arc-shaped body can be in a reverse arc-shaped state only when liquid is input into the connection opening, the connection position of the connection opening and the middle pipe is opened, and when the connection opening stops conveying, the arc-shaped body can return to the original position to be tightly attached, and backflow of the liquid in the middle pipe is prevented.

Description

Technical Field

[0001] The utility model belongs to the field of medical check valves, and more specifically, relates to a medical check valve. Background Art

[0002] Medical check valves, also known as medical one-way valves or medical non-return valves, have the main function of allowing fluid or gas to flow freely in one direction while preventing the fluid from flowing in the opposite direction, thereby ensuring the safety and effectiveness of medical procedures.

[0003] When the fluid is transported to the middle cavity and the output port through the check valve, after the fluid stops being transported continuously, the remaining fluid will have insufficient flow due to the closure of the check valve, causing it to flow intermittently or stop flowing. Utility Model Content

[0004] In order to solve the above technical problems, the purpose and effect of the medical check valve of the utility model are achieved by the following specific technical means:

[0005] Its structure includes an outer plug shell, an extension head, an access port, an arc-shaped body, a middle tube, and an outlet head. The middle tube and the outer plug shell are an integrated structure. The space between the access port and the middle tube is connected with the arc-shaped body. The access port and the extension head are an integrated structure. The outlet head is fixed to the lower end of the outer plug shell with a snap fastener.

[0006] The extension head and the outer plug shell are produced in an integrated manner to reduce the generation of burrs. The connecting head is interconnected with the middle tube and the access port space. The outer plug shell and the connecting head are mainly circular in structure as a whole. The left and right ends of the arc body are fixed to the inner surface of the outer plug shell. The outer plug shell and the connecting head are tightly snap-fitted.

[0007] As a further improvement of the present invention, the connecting head includes a fixing seat, a protrusion, an outlet, a connecting shell, and a groove. The fixing seat and the connecting shell are an integrated structure. The outlet passes through the interior of the connecting shell and is connected to the middle tube. The protrusion is located at the middle end of the fixing seat and is an integrated structure. The groove is integrated with the fixing seat. The groove facilitates the identification and assembly guidance of parts.

[0008] As a further improvement of the present invention, the protrusion is protruding and inclined, which can effectively guide the flow of internal liquid to prevent backflow. The protrusion is located in the internal space of the middle tube and plays a role in guiding the flow of liquid.

[0009] As a further improvement of the present invention, the arc-shaped body will be in a reverse arc state when liquid is input, so that the liquid in the access port can enter the middle tube. When the access port stops inputting, the arc-shaped body will return to fit the input port of the access port, and the liquid remaining inside the middle tube will be intercepted by the arc-shaped body to prevent backflow, and the lower end protrusion has a certain slope, so that the liquid can be retained on both sides.

[0010] As a further improvement of the present invention, the outlet port is located at the highest point of the protrusion, and when the liquid inside the middle tube is insufficient, it will not be output to the outlet. The fixing seat and the connecting shell are produced as an integrated whole to reduce burrs, and the outer plug shell and the outlet head are assembled in a state where they are wide in the middle and narrow on both sides.

[0011] As a further improvement of the present invention, the inlet and outlet are located on the same center line, and the liquid remaining in the middle tube will be intercepted by the arc-shaped body to prevent backflow. The arc-shaped body is elastic and will return to its position in time when there is no flow thrust of the liquid.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. An arc-shaped body can be provided at the joint between the access port and the middle tube. The arc-shaped body will be in a reverse arc state only when liquid is input into the access port. When the joint between the access port and the middle tube is opened and the access port stops delivering liquid, the arc-shaped body will return to its original position and fit tightly to prevent the liquid inside the middle tube from flowing back.

[0014] 2. The space inside the middle tube is relatively large, which can store sufficient liquid, allowing the liquid to be discharged evenly and at a constant speed through the outlet, preventing intermittent output when there is a little remaining flow.

[0015] 3. The protrusion is high in the middle and low on both sides, and the port of the outlet is located at the highest point in the middle. When there is a certain amount of residual liquid inside the middle tube, the inclination angle of the protrusion will guide the liquid to flow to both sides to prevent the liquid from flowing out of the outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front structural schematic diagram of a medical check valve of the present utility model.

[0017] Figure 2 This is a side structural diagram of a medical check valve of the present utility model.

[0018] Figure 3 This is a schematic diagram of the front structure of the outer plug shell of the utility model.

[0019] Figure 4 It is a side structural diagram of the outlet head of the utility model.

[0020] Figure 5 This is a front structural diagram of the connector of the present invention.

[0021] Figure 6 It is a structural diagram of the outlet head of the utility model.

[0022] In the figure: outer plug shell -1, extension head -2, access port -3, arc-shaped body -4, middle tube -5, connection head -6, fixing base -61, protrusion -62, connection port -63, connection shell -64, groove -65. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] As attached Figure 1 To the attached Figure 6 As shown:

[0025] The utility model provides a medical check valve, which comprises an outer plug shell 1, an extension head 2, an access port 3, an arc-shaped body 4, a middle tube 5, and an outlet head 6. The middle tube 5 and the outer plug shell 1 are an integrated structure. The space between the access port 3 and the middle tube 5 is connected with the arc-shaped body 4. The access port 3 and the extension head 2 are an integrated structure. The outlet head 6 is fixed to the lower end of the outer plug shell 1 by a snap fastener.

[0026] The extension head 2 and the outer plug shell 1 are produced as an integrated whole to reduce the generation of burrs. The space between the connecting head 6, the middle tube 5 and the access port 3 is interconnected. The outer plug shell 1 and the connecting head 6 are mainly circular in structure as a whole. The left and right ends of the arc body 4 are fixed to the inner surface of the outer plug shell 1. The outer plug shell 1 and the connecting head 6 are tightly snap-fitted. The arc body 4 is a flexible elastic rubber body and can play a good sealing role.

[0027] Among them, the connecting head 6 includes a fixed base 61, a protrusion 62, an outlet 63, a connecting shell 64, and a groove 65. The fixed base 61 and the connecting shell 64 are an integrated structure. The outlet 63 passes through the inside of the connecting shell 64 and is connected to the middle tube 5. The protrusion 62 is located at the middle end of the fixed base 61 and is an integrated structure. The groove 65 is integrated with the fixed base 61. The groove 65 facilitates the identification and assembly guidance of parts. The front of the protrusion 62 is an inclined triangle and the side is arc-shaped.

[0028] Among them, the protrusion 62 is protruding and inclined, which can effectively guide the flow of internal liquid to prevent backflow. The protrusion 62 is located in the internal space of the middle tube 5 and plays a role in guiding the flow of liquid. The extension head 2 and the connecting shell 64 are sleeved to connect the external pipe, which is simple and easy to operate.

[0029] Among them, the arc body 4 will be in a reverse arc state when liquid is input, so that the liquid in the access port 3 can be connected to the middle tube 5. When the access port 3 stops inputting, the arc body 4 will return to its original position and fit the input port of the access port 3. The liquid remaining in the middle tube 5 will be intercepted by the arc body 4 to prevent backflow, and the lower end protrusion 62 has a certain slope, so that the liquid can be retained on both sides. The middle tube 5 can collect a large amount of liquid and output it stably.

[0030] Among them, the port of the connecting port 63 is at the highest point of the protrusion 62. When the liquid inside the middle tube 5 is insufficient, it will not be output to the connecting port 63. The fixing seat 61 and the connecting shell 64 are produced as an integrated whole to reduce burrs. The outer plug shell 1 and the connecting head 6 are assembled in a state of being wide in the middle and narrow on both sides. The extension head 2 and the connecting shell 64 are relatively smooth, which assists in better loading and unloading of the external tube.

[0031] Among them, the inlet 3 and the outlet 63 are located on the same center line. The liquid remaining in the middle tube 5 will be intercepted by the arc body 4 to prevent backflow. The arc body 4 is elastic and will return to its position in time when there is no flow thrust of the liquid. The inlet 63 can output the liquid evenly.

[0032] The specific usage and function of this embodiment are as follows:

[0033] In the present invention, the outlet head 6 is assembled with the outer plug shell 1, and the external pipe is sleeved and connected with the connecting shell 64 through the extension head 2. The liquid is input through the access port 3. The arc body 4 provided at the port where the access port 3 and the middle tube 5 are connected is pushed out at the same time as the liquid is input, and is in a reverse arc shape, so that the port of the access port 3 that was originally fitted and closed is opened, and the access port 3 is connected with the middle tube 5, so that a large amount of liquid is located inside the middle tube 5 and output to the access port 63. When the liquid stops being transported, the arc body 4 loses its driving force and returns to the port of the access port 3 to prevent liquid backflow. When there is some liquid remaining in the middle tube 5, the protrusion 62 is high in the middle and low on both sides, so that the liquid will not flow out to the access port 63, and will be guided to both sides by the protrusion 62 to avoid liquid movement in the middle end.

[0034] Utilizing the technical solution described in the utility model, or those skilled in the art designing similar technical solutions inspired by the technical solution of the utility model to achieve the above-mentioned technical effects, all fall within the scope of protection of the utility model.

Claims

1. A medical check valve, comprising an outer plug shell (1), an extension head (2), an access port (3), an arcuate body (4), a middle tube (5), and an outlet head (6), wherein the middle tube (5) and the outer plug shell (1) are an integrated structure, the access port (3) and the middle tube (5) are connected to each other through the arcuate body (4), the access port (3) and the extension head (2) are an integrated structure, and the outlet head (6) is fixed to the lower end of the outer plug shell (1) by a snap-fit, characterized in that: The extension head (2) and the outer plug shell (1) are produced in an integrated manner to reduce burr generation. The connection head (6) is intercommunication with the middle tube (5) and the access port (3). The outer plug shell (1) and the connection head (6) are mainly circular in structure as a whole. The left and right ends of the arc body (4) are fixed to the inner surface of the outer plug shell (1).

2. A medical check valve according to claim 1, characterized in that: The connecting head (6) comprises a fixing seat (61), a protrusion (62), a connection port (63), a connecting shell (64), and a groove (65). The fixing seat (61) and the connecting shell (64) are an integrated structure. The connection port (63) passes through the interior of the connecting shell (64) and is connected to the middle tube (5). The protrusion (62) is located at the middle end of the fixing seat (61) and is an integrated structure. The groove (65) is integrated with the fixing seat (61).

3. A medical check valve according to claim 2, characterized in that: The protrusion (62) is in a protruding and inclined shape, and can effectively guide the flow of the internal liquid to prevent backflow.

4. The medical check valve according to claim 1, characterized in that: The arc-shaped body (4) will assume a reverse arc shape when liquid is input, so that the liquid in the access port (3) can be connected to the middle tube (5). When the access port (3) stops inputting, the arc-shaped body (4) will return to its original position and fit the input port of the access port (3).

5. The medical check valve according to claim 2, characterized in that: The port of the connecting port (63) is located at the highest point of the protrusion (62). When the liquid inside the middle tube (5) is insufficient, the liquid will not be output to the connecting port (63). The fixing seat (61) and the connecting shell (64) are produced in an integrated manner to reduce burrs.

6. The medical check valve according to claim 1, characterized in that: The inlet (3) and the outlet (63) are located on the same center line, and the liquid remaining in the middle tube (5) will be intercepted by the arc-shaped body (4) to prevent backflow.

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