A serial pipeline with air exchange, blood return guidance, one-way anti-reverse and orderly arrangement

Abstract

The present invention belongs to the field of medical devices, and particularly relates to a degassing and air-exchanging type blood return guiding one-way anti-reflux serial pipeline, which includes a degassing valve, an intermediate one-way valve, an intermediate hose and a gas exchange valve that are serially connected; a second water-blocking and air-permeable membrane is arranged between the degassing chamber and the exhaust port in the degassing chamber; a first water-blocking and air-permeable membrane is arranged between the gas-liquid exchange chamber and the air exchange port provided on the gas exchange valve; a first air-blocking membrane is arranged between the gas-liquid exchange chamber and the inner port of the liquid outlet pipeline; the intermediate hose can be deformed and alternately form positive pressure and negative pressure in its lumen; when the intermediate hose is deformed and forms positive pressure, the positive pressure can extrude the liquid; when the intermediate hose is restored and forms negative pressure, the negative pressure sucks air into the gas-liquid exchange chamber through the first water-blocking and air-permeable membrane. This solution integrates the three functions of degassing, blood return and anti-reflux, and can avoid the negative impact caused by gas entering the human body during liquid infusion; during venous puncture before infusion, it is convenient to observe the venous effect; at the same time, it can also avoid the hidden danger caused by a large amount of blood backflow.

Description

Technical Field

[0001] The present invention belongs to the field of medical devices, and particularly relates to a series of pipelines with air removal, blood return guiding, one-way anti-reflux, and orderly arrangement. Background Art

[0002] Currently, many infusion products with existing designs use one-way valves for anti-reflux. Some products set the one-way valve at the tail of the needle tip, some products add the one-way valve upstream of the infusion set, and some products use the one-way valve as a simple one-way valve joint and connect it in series at the rear interface of the infusion needle.

[0003] First, for the infusion product with a one-way valve connected to the tail of the needle tip, the reason why this product is accepted is that it is hoped to prevent the blood in the blood vessel from flowing back into the infusion product during the use of the infusion device and form blood coagulation. Generally, after blood vessel puncture, under the pressure of venous blood pressure, due to the relatively low initial pressure in the infusion product, the blood can reflux from the puncture position. However, the defect of this product is that after the medical staff punctures the blood vessel, the one-way valve blocks the blood reflux display, and the blood will not flow back into the transparent pipeline at the tail of the needle tip, and it is impossible to clearly display and judge whether the needle tip is correctly inserted into the blood vessel through the transparent pipeline, making it difficult for the medical staff to judge the puncture position of the needle tip and increasing the probability of puncture failure.

[0004] Secondly, if the one-way valve is installed at the upstream part of the pipeline in use, the original intention of this design is to avoid the drug from flowing back into the drip bottle during temporary drug addition and not quickly enter the blood vessel. This one-way valve will not affect the blood return judgment during puncture, but during and after the infusion, blood reflux will still occur, causing blood coagulation in the needle tip and subsequent thrombus to enter the blood vessel. Therefore, the use of a single one-way valve cannot perfectly solve the contradictory requirements of blood anti-reflux and puncture blood return observation.

[0005] Therefore, it is necessary to design a pipeline structure that integrates the three functions of air removal, blood return, and anti-reflux. Its air removal function is to avoid the gas mixed in the liquid entering the human body during the liquid infusion process and causing negative impacts; its blood return function is to facilitate the observation of the venous effect during the venous puncture before infusion (through the blood return in the infusion device, it can be judged whether the venous puncture is successful); and its anti-reflux function is to avoid the hidden danger caused by a large amount of blood backflow. Summary of the Invention

[0006] In order to solve the problem that it is difficult to achieve the two functions of blood anti-reflux and puncture blood return observation in the prior art, this solution provides a series of pipelines with air removal, blood return guiding, one-way anti-reflux, and orderly arrangement.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A degassing and air-exchanging type blood return guiding unidirectional anti-reverse sequential serial pipeline, comprising a degassing valve, an intermediate one-way valve, an intermediate hose and a gas exchange valve which are serially connected and communicated;

[0009] The degassing valve is provided with a liquid inlet, an inner inlet of the liquid inlet pipeline, a degassing chamber and an exhaust port; the liquid inlet is used for the liquid inlet of the degassing valve; the degassing chamber is communicated with the liquid inlet; a second air-blocking film is arranged between the degassing chamber and the inner inlet of the liquid inlet pipeline; a second water-blocking and breathable film is arranged between the degassing chamber and the exhaust port;

[0010] The intermediate one-way valve is connected to the liquid outlet side of the inner inlet of the liquid inlet pipeline and is used for the unidirectional transportation of liquid;

[0011] One end of the intermediate hose is connected to the liquid outlet side of the intermediate one-way valve;

[0012] The gas exchange valve is connected to the other end of the intermediate hose. The gas exchange valve is provided with an inner outlet of the liquid outlet pipeline, a ventilation port and a gas-liquid exchange chamber; the gas-liquid exchange chamber is communicated with the intermediate hose; a first water-blocking and breathable film is arranged between the gas-liquid exchange chamber and the ventilation port; a first air-blocking film is arranged between the gas-liquid exchange chamber and the inner outlet of the liquid outlet pipeline; the inner outlet of the liquid outlet pipeline is used for the external transportation of liquid;

[0013] The intermediate hose can be deformed and alternately form positive pressure and negative pressure in its lumen; when the intermediate hose is deformed and forms positive pressure, the positive pressure can extrude the liquid; when the intermediate hose is restored and forms negative pressure, the negative pressure sucks air into the gas-liquid exchange chamber through the first water-blocking and breathable film.

[0014] As an alternative structure or supplementary design of the above degassing and air-exchanging type blood return guiding unidirectional anti-reverse sequential serial pipeline: the second air-blocking film is parallel to the second water-blocking and breathable film, and the area covered by the second water-blocking and breathable film is not less than the area covered by the second air-blocking film; the first air-blocking film is parallel to the first water-blocking and breathable film, and the area covered by the first water-blocking and breathable film is not less than the area covered by the first air-blocking film. The effective intercepting surface of the air-blocking film in the gas exchange valve and the degassing valve is within the projection range of the effective breathable surface of the water-blocking and breathable film, that is, the corresponding air-blocking film and the corresponding water-blocking and breathable film are facing each other without mutual dislocation, so as to effectively eliminate the degassing dead angle between the air-blocking film and the water-blocking and breathable film and improve the effectiveness and quality of degassing.

[0015] As an alternative structure or supplementary design of the above degassing and air-exchanging type blood return guiding unidirectional anti-reverse sequential serial pipeline: the degassing valve is one of the following two structural forms; in the first structural form, the second air-blocking film and the second water-blocking and breathable film are parallel to the liquid flow direction at the liquid inlet; in the second structural form, the second air-blocking film and the second water-blocking and breathable film are perpendicular to the liquid flow direction at the liquid inlet.

[0016] As an alternative structure or supplementary design for the above-mentioned air-removing and gas-exchanging blood return guiding unidirectional anti-reflux sequential serial pipeline: when the air-removing valve adopts the first structural form, the exhaust port is arranged on the outer peripheral side of the air-removing valve, the exhaust port is directly opposite to the second water-blocking and air-permeable membrane, a second gland is arranged at the exhaust port, and a second ventilation hole is arranged on the second gland. The function of the second gland is to attach to and support the second water-blocking and air-permeable membrane, and the gas generated by air removal can be discharged through the second ventilation hole.

[0017] As an alternative structure or supplementary design for the above-mentioned air-removing and gas-exchanging blood return guiding unidirectional anti-reflux sequential serial pipeline: when the air-removing valve adopts the second structural form, the exhaust port is arranged on the axial side of the air-removing valve; each exhaust port is directly opposite to the second water-blocking and air-permeable membrane; the exhaust port includes a second installation cavity and a second ventilation hole, and a second filter element capable of being closed by water is arranged in each second installation cavity, and the second ventilation hole communicates with the external air environment.

[0018] As an alternative structure or supplementary design for the above-mentioned air-removing and gas-exchanging blood return guiding unidirectional anti-reflux sequential serial pipeline: there are multiple exhaust ports, which are circumferentially distributed around the liquid inlet.

[0019] As an alternative structure or supplementary design for the above-mentioned air-removing and gas-exchanging blood return guiding unidirectional anti-reflux sequential serial pipeline: the air-removing valve includes a front valve head, a central ring member and a rear valve head; the rear end of the front valve head is in a cylindrical shape, and the liquid inlet is arranged on the front valve head; the central ring member is connected between the front valve head and the rear valve head; the rear valve head is used to connect the intermediate hose, and the intermediate one-way valve is connected to the central ring member or the rear valve head. The air-removing valve adopts a combined structure, which can meet the installation of different sizes by replacing different components. In addition, the combined structure can facilitate the installation of the second air-blocking membrane and the second water-blocking and air-permeable membrane on different components, so that the two can more easily meet the required matching requirements.

[0020] As an alternative structure or supplementary design for the above-mentioned air-removing and gas-exchanging blood return guiding unidirectional anti-reflux sequential serial pipeline: the second air-blocking membrane is arranged at the edge of the front end of the central ring member, and the second water-blocking and air-permeable membrane is arranged at the inner bottom of the front valve head.

[0021] As an alternative structure or supplementary design for the above-mentioned air-removing and gas-exchanging blood return guiding unidirectional anti-reflux sequential serial pipeline: the gas exchange valve is shaped after the first structural form or the second structural form of the air-removing valve.

[0022] As an alternative structure or supplementary design for the above-mentioned air-removing and gas-exchanging blood return guiding unidirectional anti-reflux sequential serial pipeline: the liquid can form a turbulent flow in the air-removing chamber and the gas-liquid exchange chamber, while the cross-sectional areas of the other lumens of the above-mentioned air-removing and gas-exchanging blood return guiding unidirectional anti-reflux sequential serial pipeline are not greater than 7 square millimeters to prevent the formation of a turbulent flow state in the other lumens; the turbulent flow includes one or more of turbulent flow, mixed flow and swirling flow.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. The serial pipeline in this solution integrates three functions: degassing, blood return, and anti-reflux. It can prevent the gas mixed in the liquid from entering the human body during liquid infusion, thus avoiding negative impacts; during venous puncture before infusion, it is convenient to observe the venous effect; at the same time, it can also avoid the potential hazards caused by a large amount of blood backflow.

[0025] 2. During the entire life cycle of using the infusion product in this solution, the designed service life is 72 hours. During use, all components cooperate with each other to form a complete multi-functional integrated whole; it can achieve one-way anti-reflux at all times. The gas exchange valve and the degassing valve are necessary auxiliary devices for the anti-reflux one-way valve; the structure of the intermediate hose is also a key device for realizing the function of the one-way valve. Components such as the degassing valve, intermediate one-way valve, intermediate hose, and gas exchange valve connected in series are arranged in a fixed front-back order. Other bypass pipelines can be connected to the intermediate hose without affecting the use of the serial pipeline in this solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of this solution or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art.

[0027] Figure 1 It is a schematic structural diagram of a serial pipeline with degassing, blood return, and anti-reflux functions in an orderly manner;

[0028] Figure 2 It is Figure 1 the structural diagram of the degassing valve in

[0029] Figure 3 It is another schematic structural diagram of a serial pipeline with degassing, blood return, and anti-reflux functions in an orderly manner;

[0030] Figure 4 It is Figure 3 the structural diagram of the degassing valve in

[0031] In the figure: 1 - gas exchange valve; 2 - intermediate hose; 3 - degassing valve; 31 - front valve head; 32 - central ring part; 33 - rear valve head; 4 - intermediate one-way valve; 5a - first water-blocking and air-permeable membrane; 5b - second water-blocking and air-permeable membrane; 6a - first air-blocking membrane; 6b - second air-blocking membrane; 7a - first gland; 7b - second gland; 8a - first ventilation hole; 8b - second ventilation hole; 10 - gas-liquid exchange chamber; 11 - degassing chamber; 14 - inner port of the liquid inlet pipeline; 15 - inner port of the liquid outlet pipeline; 16 - liquid inlet; 17 - liquid outlet; 18a - first filter element; 18b - second filter element. Detailed implementation mode

[0032] The technical solutions in the present embodiment will be clearly and completely described below in conjunction with the accompanying drawings. The described embodiments are only a part of the embodiments, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this solution without making creative efforts fall within the protection scope of this solution.

[0033] Embodiment 1

[0034] As Figures 1 to 2 shown, in this embodiment, a degassing and air-exchanging blood return guiding unidirectional non-return serial pipeline is designed, which includes components such as a degassing valve 3, an intermediate one-way valve 4, an intermediate hose 2, and a gas exchange valve 1 that are serially connected.

[0035] The degassing valve 3 is provided with a liquid inlet 16, an inner liquid inlet of the liquid inlet pipeline 14, a degassing chamber 11, and an exhaust port; the liquid inlet 16 is used for the liquid inlet of the degassing valve 3; the degassing chamber 11 is communicated with the liquid inlet 16; a second air-blocking film 6b is arranged between the degassing chamber 11 and the inner liquid inlet of the liquid inlet pipeline 14; a second water-blocking and air-permeable film 5b is arranged between the degassing chamber 11 and the exhaust port. The second air-blocking film 6b is parallel to the second water-blocking and air-permeable film 5b, and the area covered by the second water-blocking and air-permeable film 5b is not less than the area covered by the second air-blocking film 6b; the first air-blocking film 6a is parallel to the first water-blocking and air-permeable film 5a, and the area covered by the first water-blocking and air-permeable film 5a is not less than the area covered by the first air-blocking film 6a.

[0036] The intermediate one-way valve 4 is connected to the liquid outlet side of the inner liquid inlet of the liquid inlet pipeline 14 and is used for the one-way transportation of liquid.

[0037] One end of the intermediate hose 2 is connected to the liquid outlet side of the intermediate one-way valve 4.

[0038] The gas exchange valve 1 is connected to the other end of the intermediate hose 2. The gas exchange valve 1 is provided with an inner liquid outlet of the liquid outlet pipeline 15, a ventilation port, and a gas-liquid exchange chamber 10; the gas-liquid exchange chamber 10 is communicated with the intermediate hose 2; a first water-blocking and air-permeable film 5a is arranged between the gas-liquid exchange chamber 10 and the ventilation port; a first air-blocking film 6a is arranged between the gas-liquid exchange chamber 10 and the inner liquid outlet of the liquid outlet pipeline 15; the inner liquid outlet of the liquid outlet pipeline 15 can output liquid through the liquid outlet.

[0039] The intermediate hose 2 can be deformed and alternately form positive pressure and negative pressure in its lumen; when the intermediate hose 2 is deformed and forms positive pressure, the positive pressure can extrude the liquid; when the intermediate hose 2 is restored and forms negative pressure, the negative pressure sucks air into the gas-liquid exchange chamber 10 through the first water-blocking and air-permeable film 5a.

[0040] The degassing valve 3 adopts the first structural form, that is, the second air barrier film 6b and the second water-blocking and breathable film 5b are parallel to the liquid flow direction at the liquid inlet 16. In this first structural form, the liquid inlet 16 is arranged on the lower right side of the degassing chamber 11. After the liquid enters the tandem pipeline, it enters the degassing valve 3 from the liquid inlet 16, and then enters the degassing chamber 11 from the lower right side direction at the middle position between the second air barrier film 6b and the second water-blocking and breathable film 5b. The liquid undergoes gas-liquid separation at the second air barrier film 6b, and bubbles are formed on the film surface of the second air barrier film 6b close to the degassing chamber 11 side. When the bubble pressure is large and generates a large buoyancy force, the bubble floats to the second water-blocking and breathable film 5b and is discharged to the external air environment through the exhaust port. The exhaust port is arranged on the outer peripheral side of the degassing valve 3, and the exhaust port is directly opposite to the second water-blocking and breathable film 5b. A second gland 7b is arranged at the exhaust port, and a second ventilation hole 8b is arranged on the second gland 7b. The function of the second gland 7b is to attach to and support the second water-blocking and breathable film 5b, and the gas generated by degassing can be discharged through the second ventilation hole 8b.

[0041] The gas exchange valve 1 is modeled after the first structural form of the gas exchange valve 1. That is: the first air barrier film 6a and the first water-blocking and breathable film 5a are parallel to the liquid flow direction at the liquid inlet 16. The air exchange port is arranged on the outer peripheral side of the gas exchange valve 3, and the air exchange port is directly opposite to the first water-blocking and breathable film 5a. A first gland 7a is arranged at the air exchange port, and a first ventilation hole 8a is arranged on the first gland 7a. The function of the first gland 7a is to attach to and support the first water-blocking and breathable film 5a, and the gas generated by gas exchange can be discharged through the first ventilation hole 8a, or air in the external environment can be inhaled through the first ventilation hole 8a. In this first structural form, the intermediate hose 2 is connected to the lower right side of the gas-liquid exchange chamber. When the liquid in the intermediate pipeline enters the gas exchange valve 1, it can enter the gas-liquid exchange chamber from the lower right side direction at the middle position between the first air barrier film 6a and the first water-blocking and breathable film 5a. The liquid undergoes gas-liquid separation at the first air barrier film 6a, and bubbles are formed on the film surface of the first air barrier film 6a close to the gas-liquid exchange chamber side. When the bubble pressure is large and generates a large buoyancy force, the bubble floats to the first water-blocking and breathable film 5a and is discharged to the external air environment through the air exchange port, specifically, the gas is discharged through the first ventilation hole 8a at the center of the first gland 7a at the air exchange port. In addition, air in the external air environment can also enter the gas exchange valve 1 from the first water-blocking and breathable film 5a to accelerate the formation of bubbles at its first air barrier film 6a.

[0042] The degassing chamber 11 and the gas-liquid exchange chamber 10 have a certain space, enabling the liquid to form a turbulent flow within the degassing chamber 11 and the gas-liquid exchange chamber 10. The cross-sectional areas of the other lumens of the tandem pipeline are all not greater than 7 square millimeters to prevent the formation of a turbulent flow state within the other lumens. The turbulent flow includes one or more of turbulent flow, mixed flow, and swirling flow. Since a turbulent flow can be formed within the degassing chamber 11 and the gas-liquid exchange chamber 10, it becomes easier to form gas-liquid separation within the two chambers. The cross-sectional areas of the other lumens of the tandem pipeline are within 7 square millimeters, causing the liquid flow state within these lumens to form a steady flow pattern. When more than 95% of the lumens in the tandem pipeline are in a steady flow pattern, it avoids the generation of gas-liquid separation, the formation of bubbles, and the influence on the infusion of the liquid within the lumens other than the degassing chamber 11 and the gas-liquid exchange chamber 10.

[0043] When the tandem pipeline of this embodiment is in use, it can be connected in series behind the puncture needle for infusing the product. After puncturing the blood vessel, the liquid in the gas-liquid exchange chamber 10 and the intermediate flexible tube 2 can be degassed and extruded into the blood vessel by squeezing or bending the intermediate flexible tube 2. When the intermediate flexible tube 2 returns to its original state, external air can be inhaled into the gas-liquid exchange chamber 10 through the second water-blocking and air-permeable membrane 5b, and at the same time, a negative pressure is formed within the gas-liquid exchange chamber 10. While the negative pressure sucks the air into the gas-liquid exchange chamber 10, it also enables the blood to flow back into the transparent flexible tube behind the puncture needle under the action of the blood pressure, for judging whether the venous puncture of the blood is successful. During the normal infusion process of the medicinal liquid, the medicinal liquid passes through the degassing valve 3, the intermediate one-way valve 4, the intermediate flexible tube 2, and the gas exchange valve 1 in sequence and is injected into the blood vessel. During this process, the gas carried in the medicinal liquid can undergo gas-liquid separation within the degassing chamber 11 and the gas-liquid exchange chamber 10, thus preventing the gas from being transported into the blood vessel. In addition, the structure of the intermediate one-way valve 4 can prevent the blood from flowing back into the degassing valve 3 during the venous puncture stage and the normal infusion stage of the medicinal liquid.

[0044] Embodiment 2

[0045] As Figures 3 to 4 shown, this embodiment designs another tandem pipeline with degassing and replacement type blood return guiding, one-way anti-reflux, and orderliness, including components such as a degassing valve 3, an intermediate one-way valve 4, an intermediate flexible tube 2, and a gas exchange valve 1 that are serially connected.

[0046] The degassing valve 3 is provided with a liquid inlet 16, an inner inlet of the liquid inlet pipeline 14, a degassing chamber 11 and an exhaust port; the liquid inlet 16 is used for the liquid inlet of the degassing valve 3; the degassing chamber 11 is communicated with the liquid inlet 16; a second air barrier film 6b is arranged between the degassing chamber 11 and the inner inlet of the liquid inlet pipeline 14; a second water-blocking and air-permeable film 5b is arranged between the degassing chamber 11 and the exhaust port. The second air barrier film 6b is parallel to the second water-blocking and air-permeable film 5b, and the area covered by the second water-blocking and air-permeable film 5b is not less than the area covered by the second air barrier film 6b; the first air barrier film 6a is parallel to the first water-blocking and air-permeable film 5a, and the area covered by the first water-blocking and air-permeable film 5a is not less than the area covered by the first air barrier film 6a.

[0047] The intermediate one-way valve 4 is connected to the liquid outlet side of the inner inlet of the liquid inlet pipeline 14 and is used for the one-way transportation of liquid.

[0048] One end of the intermediate hose 2 is connected to the liquid outlet side of the intermediate one-way valve 4. The intermediate hose 2 can recover from the deformed state and form a negative pressure in its lumen to suck air into the gas-liquid exchange chamber 10 by using the negative pressure.

[0049] The gas exchange valve 1 is connected to the other end of the intermediate hose 2. The gas exchange valve 1 is provided with an inner outlet of the liquid outlet pipeline 15, a ventilation port and a gas-liquid exchange chamber 10; the gas-liquid exchange chamber 10 is communicated with the intermediate hose 2; a first water-blocking and air-permeable film 5a is arranged between the gas-liquid exchange chamber 10 and the ventilation port; a first air barrier film 6a is arranged between the gas-liquid exchange chamber 10 and the inner outlet of the liquid outlet pipeline 15; the inner outlet of the liquid outlet pipeline 15 is used for the external transportation of liquid;

[0050] The degassing valve 3 adopts a second structural form, that is, the second air barrier film 6b and the second water-blocking and air-permeable film 5b are perpendicular to the liquid flow direction at the liquid inlet 16. In this second structural form, the liquid inlet 16 is arranged directly to the right of the degassing chamber 11. After the liquid enters the tandem pipeline, it enters the degassing valve 3 from the liquid inlet 16. The second water-blocking and air-permeable film 5b is in a circular ring shape, and the liquid enters the degassing chamber 11 from the center of the ring of the second water-blocking and air-permeable film 5b. The exhaust port is arranged on the axial side of the degassing valve 3; each exhaust port is directly opposite to the second water-blocking and air-permeable film 5b; the exhaust port includes a second installation cavity and a second ventilation hole 8b, and a second filter element 18b capable of being closed by water is arranged in each second installation cavity, and the second ventilation hole 8b is communicated with the external air environment. There are a plurality of exhaust ports, which are circumferentially distributed centered on the liquid inlet 16.

[0051] The degassing valve 3 includes a front valve head 31, a central ring member 32 and a rear valve head 33; the rear end of the front valve head 31 is cylindrical, and the liquid inlet 16 is arranged on the front valve head 31; the central ring member 32 is connected between the front valve head 31 and the rear valve head 33; the rear valve head 33 is used to connect the intermediate hose 2, and the intermediate one-way valve 4 is connected to the central ring member 32 or the rear valve head 33. The second air blocking film 6b is arranged at the edge of the front end of the central ring member 32, and the second water blocking and breathable film 5b is arranged at the inner bottom of the front valve head 31.

[0052] The gas exchange valve 1 is shaped after the second structural form of the degassing valve 3. That is, the first air blocking film 6a and the first water blocking and breathable film 5a are perpendicular to the liquid flow direction at the liquid outlet 17. In this second structural form, the liquid outlet 17 is arranged on the left side of the gas-liquid exchange chamber, the first water blocking and breathable film 5a is annular, and when the liquid enters the gas exchange valve 1 through the intermediate hose 2, the liquid can enter the gas-liquid exchange chamber from the center of the first water blocking and breathable film 5a. The air exchange ports are arranged on the axial right side of the gas exchange valve 1; each air exchange port is directly opposite to the first water blocking and breathable film 5a; the air exchange port includes a first installation cavity and a first ventilation hole 8a, and a first filter element 18a that can be closed by water is arranged in each first installation cavity, and the first ventilation hole 8a communicates with the external air environment. There are a plurality of the air exchange ports, and they are distributed circumferentially around the intermediate hose 2. The gas exchange valve 1 may also include components such as a front valve head 31, a central ring member 32 and a rear valve head 33, and the central ring member 32 and the rear valve head 33 may adopt an integral structure, and the intermediate one-way valve 4 is not arranged at the gas exchange valve 1.

[0053] Embodiment 3

[0054] On the basis of the structure of Embodiment 1, the degassing valve 3 may adopt the first structural form, and the gas exchange valve 1 may be shaped after the second structural form of the degassing valve 3. For the detailed structure, refer to Embodiment 1 and Embodiment 2, and details are not described here.

[0055] The above embodiments are only examples for clear illustration and not limitations on the implementation manners; it is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present technology.

Claims

1. A serial pipeline with air exchange and blood return guiding and one-way anti-reverse order, characterized in that: It includes a degassing valve (3), an intermediate one-way valve (4), an intermediate hose (2), and a gas exchange valve (1) connected in series; The degassing valve (3) is provided with a liquid inlet (16), an inner inlet of the liquid inlet pipeline (14), a degassing chamber (11), and an exhaust port; the liquid inlet (16) is used for the liquid inlet of the degassing valve (3); the degassing chamber (11) is communicated with the liquid inlet (16); a second air-blocking film (6b) is arranged between the degassing chamber (11) and the inner inlet of the liquid inlet pipeline (14); a second water-blocking and air-permeable film (5b) is arranged between the degassing chamber (11) and the exhaust port; The intermediate one-way valve (4) is connected to the liquid outlet side of the inner inlet of the liquid inlet pipeline (14) and is used for the one-way transportation of liquid; One end of the intermediate hose (2) is connected to the liquid outlet side of the intermediate one-way valve (4); The gas exchange valve (1) is connected to the other end of the intermediate hose (2). The gas exchange valve (1) is provided with an inner outlet of the liquid outlet pipeline (15), a ventilation port, and a gas-liquid exchange chamber (10); the gas-liquid exchange chamber (10) is communicated with the intermediate hose (2); a first water-blocking and air-permeable film (5a) is arranged between the gas-liquid exchange chamber (10) and the ventilation port; a first air-blocking film (6a) is arranged between the gas-liquid exchange chamber (10) and the inner outlet of the liquid outlet pipeline (15); the inner outlet of the liquid outlet pipeline (15) is used for the external transportation of liquid; The intermediate hose (2) can be deformed and alternately form positive pressure and negative pressure in its lumen; when the intermediate hose (2) is deformed and forms positive pressure, the positive pressure can extrude the liquid; when the intermediate hose (2) resumes and forms negative pressure, the negative pressure sucks air into the gas-liquid exchange chamber (10) through the first water-blocking and air-permeable film (5a); The second air-blocking film (6b) is parallel to the second water-blocking and air-permeable film (5b), and the area covered by the second water-blocking and air-permeable film (5b) is not less than the area covered by the second air-blocking film (6b); the first air-blocking film (6a) is parallel to the first water-blocking and air-permeable film (5a), and the area covered by the first water-blocking and air-permeable film (5a) is not less than the area covered by the first air-blocking film (6a); The degassing valve (3) is one of the following two structural forms; in the first structural form, the second air-blocking film (6b) and the second water-blocking and air-permeable film (5b) are parallel to the liquid flow direction at the liquid inlet (16); in the second structural form, the second air-blocking film (6b) and the second water-blocking and air-permeable film (5b) are perpendicular to the liquid flow direction at the liquid inlet (16).

2. The serial pipeline with air-exchanging and blood-return guiding and unidirectional anti-reflux in an orderly manner according to claim 1, wherein: When the degassing valve (3) adopts the first structural form, the exhaust port is arranged on the outer peripheral side of the degassing valve (3), the exhaust port is directly opposite to the second water-blocking and air-permeable film (5b), a second gland (7b) is arranged at the exhaust port, and a second ventilation hole (8b) is arranged on the second gland (7b).

3. The tandem pipeline with air exchange, blood return guiding, and one-way anti-reflux in an orderly manner according to claim 1, wherein: When the degassing valve (3) adopts the second structural form, the exhaust port is arranged on the axial side of the degassing valve (3); each exhaust port is directly opposite to the second water-blocking and air-permeable film (5b); the exhaust port includes a second installation cavity and a second ventilation hole (8b), and a second filter element (18b) capable of being closed by water is arranged in each second installation cavity, and the second ventilation hole (8b) is communicated with the external air environment.

4. The serial pipeline with air exchange, blood return guiding and unidirectional backflow prevention as claimed in claim 3, characterized in that: The exhaust ports are multiple and are circumferentially distributed centered on the liquid inlet (16).

5. The tandem pipeline with air exchange, blood return guidance and one-way anti-reverse order according to claim 3, characterized in that: The degassing valve (3) includes a front valve head (31), a central ring member (32) and a rear valve head (33); the rear end of the front valve head (31) is cylindrical, and the liquid inlet (16) is arranged on the front valve head (31); the central ring member (32) is connected between the front valve head (31) and the rear valve head (33); the rear valve head (33) is used to connect the intermediate hose (2), and the intermediate check valve (4) is connected to the central ring member (32) or the rear valve head (33).

6. The tandem pipeline with air exchange and blood return guidance and one-way anti-reflux in an orderly manner according to claim 5, characterized in that: The second air-blocking film (6b) is arranged at the edge of the front end of the central ring member (32), and the second water-blocking and breathable film (5b) is arranged at the inner bottom of the front valve head (31).

7. The tandem pipeline with air removal, ventilation, blood return guidance and one-way anti-reverse order according to claim 6, characterized in that: The gas exchange valve (1) is shaped after the first structural form or the second structural form of the degassing valve (3).

8. The tandem pipeline with air-exchanging and blood-return guiding and one-way anti-reflux in an orderly manner according to claim 1, wherein: The liquid can form a turbulent flow in the degassing chamber (11) and the gas-liquid exchange chamber (10), while the cross-sectional areas of the other lumens of the other tubes of the degassing and exchanging type blood return guiding unidirectional check valve series pipeline are not greater than 7 square millimeters to prevent the formation of a turbulent flow state in the other lumens; the turbulent flow includes one or more of turbulent flow, mixed flow and swirling flow.

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