Double-layer liquid medicine filter capable of preventing bubbles and blockage

Abstract

The double-layer liquid medicine filter comprises a first cover body and a second cover body, a base is connected between the first cover body and the second cover body, a first film placing ring and a second film placing ring are fixedly arranged in the axis direction of an inner cavity of the base, and the first film placing ring and the second film placing ring are the same in structure and are oppositely arranged. A first filtering membrane is arranged in the direction, close to the first cover body, of the first membrane placing ring, a second filtering membrane is arranged in the direction, close to the second cover body, of the second membrane placing ring, a liquid inlet cavity is formed between the first filtering membrane and the second filtering membrane, a liquid inlet is formed in the direction, facing the liquid inlet cavity, of the liquid inlet end, and a splitter plate abutting against the liquid inlet is fixed to the inner wall of the liquid inlet cavity; and an inclined flow guide frame fixedly connected with the inner wall of the liquid inlet cavity is connected to the flow distribution plate in the direction towards the liquid outlet end. According to the utility model, the utilization rate of the filtering membranes on the two sides can be improved, the filtering area of liquid medicine in unit time can be increased by the two layers of filtering membranes, the filtering membranes can be effectively prevented from being blocked, the flow direction of the liquid medicine can be effectively guided, and bubbles can be effectively prevented from being generated.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a double-layer liquid medicine filter which is resistant to bubbles and blockages. Background Art

[0002] Infusion is a very common medical method in clinical applications. It can directly inject the drug solution into the blood, allowing the drug to exert its efficacy at the fastest speed. In order to prevent the insoluble particles produced by the drug solution compatibility reaction and the debris produced when puncturing the infusion bottle from entering the human blood circulation system and causing adverse effects on the human body, a drug solution filter with a precision filtration function is required during the infusion process. Common drug solution filters generally have pore sizes of 15μm, 5μm, 3μm, 2μm, 1.2μm and 0.2μm. Generally, the smaller the pore size, the greater the resistance to the infusion of the drug solution during the infusion process, and the easier it is for the filter membrane to be blocked. In addition, the drug solution filter needs to participate in the exhaust operation of the infusion set. The internal structure of the filter often affects the smooth exhaust. If bubbles are hidden inside the filter and flow into the human blood circulation system with the drug solution, it will cause damage to the patient.

[0003] The applicant's existing patent document with publication number CN207755609U discloses "a drug liquid filter" which includes two layers of filter membranes and two upper covers. After the drug liquid enters the filter from the liquid inlet, it will be filtered through the two layers of filter membranes, thereby increasing the filtration area. A guide and support structure is also provided in the drug liquid filter, which is not easy to hide bubbles and makes infusion safer. However, there are some problems with this solution: on the one hand, after the drug liquid filter is connected to the infusion pump, the drug liquid filter is not necessarily vertical and may be tilted to a certain extent, which results in the filter membrane on one side of the two layers of filter membranes not playing a corresponding filtering role, and the drug liquid is easily blocked at the filter membrane on the other side; on the other hand, the guide and support structure in this solution has a poor guide effect and poor ability to suppress bubbles. Utility Model Content

[0004] In order to solve the technical problems in the prior art that when the liquid medicine filter is tilted, the liquid medicine is easily blocked at one side of the filter membrane, the diversion effect is poor and the bubble suppression ability is poor, the utility model provides the following technical solutions.

[0005] The utility model discloses a double-layer liquid medicine filter that is anti-bubble and anti-clogging, comprising a first cover body and a second cover body that are arranged opposite to each other, a base provided with a liquid inlet end and a liquid outlet end being connected between the first cover body and the second cover body, a first film-releasing ring and a second film-releasing ring that are identical in structure and arranged opposite to each other are fixedly provided in the axial direction of an inner cavity of the base, the first film-releasing ring is provided with a first filter membrane in a direction close to the first cover body, the second film-releasing ring is provided with a second filter membrane in a direction close to the second cover body, a liquid inlet cavity is formed between the first filter membrane and the second filter membrane, a liquid inlet port is provided at the liquid inlet end toward the direction of the liquid inlet cavity, a diverter plate that abuts against the liquid inlet port is fixed to the inner wall of the liquid inlet cavity, and the diverter plate is connected to an inclined flow guide frame that is fixedly connected to the inner wall of the liquid inlet cavity toward the direction of the liquid outlet end.

[0006] As a further technical solution, the diverter plate is horizontally located on the diameter of the circular cross-section of the liquid inlet, and the diverter plate is rounded in the direction toward the liquid inlet.

[0007] As a further technical solution, the liquid outlet end is provided with two oppositely arranged liquid outlets, and the liquid outlets are provided with a plurality of drainage columns.

[0008] As a further technical solution, the flow guide frame is connected to a plurality of support bodies whose upper and lower ends abut against the first filter membrane and the second filter membrane.

[0009] As a further technical solution, the support body is a sphere or a column with rounded corners at both ends.

[0010] As a further technical solution, the diverter plate is a semicircular structure connected to the inner wall of the liquid inlet cavity, and the diverter plate extends from the liquid inlet toward the liquid outlet.

[0011] As a further technical solution, the flow guide frame is composed of a plurality of sheet structures inclined toward the liquid outlet end.

[0012] The utility model has the beneficial effect that a diverter plate is provided at the liquid inlet of the utility model, and the diverter plate can evenly divert the liquid medicine to the first filter membrane and the second filter membrane on both sides of the liquid inlet cavity, thereby improving the utilization rate of the filter membranes on both sides. The two-layer filter membrane can increase the filtering area of ​​the liquid medicine per unit time, and can effectively prevent the filter membrane from being blocked. The guide frame connected to the diverter plate toward the liquid outlet end is composed of a plurality of sheet structures inclined toward the liquid outlet end, and a plurality of support bodies abutting against the first filter membrane and the second filter membrane are fixedly connected thereon, which can effectively guide the flow direction of the liquid medicine and effectively prevent the generation of bubbles. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the double-layer liquid medicine filter of the utility model which prevents bubbles and clogging;

[0014] Figure 2 It is a schematic diagram of the exploded structure of the double-layer liquid medicine filter of the utility model which prevents bubbles and clogging;

[0015] Figure 3 It is a schematic cross-sectional view of the base of the double-layer liquid medicine filter of the utility model which is resistant to bubbles and blockages;

[0016] Figure 4 It is a schematic cross-sectional view of the liquid outlet of the double-layer liquid medicine filter for preventing bubbles and clogging of the utility model;

[0017] In the figure: 1-first cover body; 2-second cover body; 3-base; 4-liquid inlet end; 401-liquid inlet; 5-liquid outlet end; 501-liquid outlet; 502-drainage column; 6-first filter membrane; 7-second filter membrane; 8-first membrane release ring; 9-second membrane release ring; 10-diverter plate; 11-guide frame; 12-support body; 13-liquid inlet cavity. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0019] In the description of the present invention, it should be understood that the terms "upper" and "lower" are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0020] like Figure 1 and Figure 2As shown, the utility model is a double-layer liquid medicine filter that prevents bubbles and clogging, including a first cover body 1 and a second cover body 2 that are arranged opposite to each other. The first cover body 1 and the second cover body 2 adopt the existing structure, which will not be described in detail. A base 3 is connected between the first cover body 1 and the second cover body 2, that is, the first cover body 1 and the second cover body 2 can be sealed and connected to both sides of the base 3 by means of snap-on connection or the like. The two opposite sides of the base 3 are respectively a liquid inlet end 4 and a liquid outlet end 5, and the liquid inlet end 4 and the liquid outlet end 5 are on the same axis. It should be known that when actually used for infusion, the liquid inlet end 4 is at the top and the liquid outlet end 5 is at the bottom, and the first cover body 1 and the second cover body 2 are both in a vertical state when used.

[0021] like Figure 3 and Figure 4 As shown, in a preferred embodiment, a first film release ring 8 and a second film release ring 9 with the same structure and arranged oppositely are fixedly arranged in the axial direction of the inner cavity of the base 3. The first film release ring 8 is provided with a first filter membrane 6 in the direction close to the first cover body 1, and the second film release ring 9 is provided with a second filter membrane 7 in the direction close to the second cover body 2. That is, a first liquid outlet channel is formed between the first cover body 1 and the first filter membrane 6, and a second liquid outlet channel is formed between the second cover body 2 and the second filter membrane 7. At the same time, a liquid inlet cavity 13 is formed between the first filter membrane 6 and the second filter membrane 7. The liquid enters the liquid inlet cavity 13 from the liquid inlet end 4, and after being filtered by the first filter membrane 6 and the second filter membrane 7, it flows out from the first liquid outlet channel and the second liquid outlet channel to the liquid outlet end 5 respectively. The liquid outlet end 5 is provided with two liquid outlets 501 with the same structure arranged oppositely, one of which is located in the first liquid outlet channel, and the other is located in the second liquid outlet channel. A plurality of drainage columns 502 are provided at each liquid outlet 501 to guide the liquid to flow into the liquid outlet end 5 while reducing the generation of bubbles.

[0022] In a preferred embodiment, the liquid inlet end 4 is provided with a liquid inlet 401 in the direction of the liquid inlet cavity 13, and a diverter plate 10 is fixed on the inner wall of the liquid inlet cavity 13 to abut against the liquid inlet 401, and the diverter plate 10 is horizontally located on the diameter of the circular cross section of the liquid inlet 401. That is, the diverter plate 10 is located in the middle of the liquid inlet cavity 13, and the diverter plate 10 can evenly divert the liquid medicine entering from the liquid inlet 401 to the first filter membrane 6 and the second filter membrane 7 on both sides of the liquid inlet cavity 13, thereby improving the utilization rate of the filter membranes on both sides. The two layers of filter membranes can increase the filtering area of ​​the liquid medicine per unit time, and can effectively prevent the filter membrane from being blocked.

[0023] The diverter plate 10 is a semicircular structure connected to the inner wall of the liquid inlet chamber 13. The diverter plate 10 extends from the liquid inlet 401 toward the liquid outlet 5, that is, the diverter plate 10 is not limited to the horizontal area shown in the figure. It can be set to a larger area as needed to further separate the liquid inlet chamber 13, so that the drug solution is filtered separately at the first filter membrane 6 or the second filter membrane 7. In order to reduce the generation of bubbles, the diverter plate 10 is rounded in the direction of the liquid inlet 401.

[0024] In a preferred embodiment, the flow guide frame 11 fixedly connected to the inner wall of the liquid inlet cavity 13 is connected to the flow guide plate 10 in the direction of the liquid outlet 5. The flow guide frame 11 is inclined and is composed of a plurality of sheet structures inclined in the direction of the liquid outlet 5. When used for infusion, the flow guide frame 11 is in an inverted tree-like structure, so that the liquid medicine can be effectively drained to prevent the generation of bubbles. The flow guide frame 11 is connected to a plurality of support bodies 12 whose upper and lower ends are in contact with the first filter membrane 6 and the second filter membrane 7. The support body 12 is a sphere or a columnar body with rounded corners at both ends. It not only supports the first filter membrane 6 and the second filter membrane 7, but also can drain the liquid medicine so that the liquid medicine can be filtered nearby, that is, the liquid medicine flowing to the support body 12 is filtered after contacting the first filter membrane 6 or the second filter membrane 7.

[0025] When the utility model is in use, the medicinal liquid enters from the liquid inlet 401, and the diverter plate 10 can evenly divert the medicinal liquid entering from the liquid inlet 401 to the first filter membrane 6 and the second filter membrane 7 on both sides of the liquid inlet cavity 13. The guide frame 11 and the support body 12 can effectively drain the medicinal liquid to prevent the generation of bubbles. The medicinal liquid filtered by the first filter membrane 6 and the second filter membrane 7 on both sides of the liquid inlet cavity 13 is drained again at the liquid outlet 501 and discharged from the liquid outlet end 5.

[0026] The preferred specific implementation modes and embodiments of the utility model are described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above implementation modes and embodiments, and various changes or equivalent substitutions can be made within the knowledge scope of those skilled in the art without departing from the concept of the utility model. Therefore, the utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the utility model.

Claims

1. A double-layer liquid medicine filter that prevents bubbles and clogging, comprising a first cover body (1) and a second cover body (2) arranged oppositely, a base (3) provided with a liquid inlet end (4) and a liquid outlet end (5) being connected between the first cover body (1) and the second cover body (2), a first film release ring (8) and a second film release ring (9) having the same structure and arranged oppositely being fixedly provided in the axial direction of the inner cavity of the base (3), a first filter membrane (6) being provided on the first film release ring (8) in a direction close to the first cover body (1), and a second filter membrane (7) being provided on the second film release ring (9) in a direction close to the second cover body (2), characterized in that: A liquid inlet cavity (13) is formed between the first filter membrane (6) and the second filter membrane (7); a liquid inlet port (401) is provided at the liquid inlet end (4) in the direction of the liquid inlet cavity (13); a diverter plate (10) abutting against the liquid inlet port (401) is fixed to the inner wall of the liquid inlet cavity (13); and a diverter plate (11) fixedly connected to the inner wall of the liquid inlet cavity (13) and in the direction of the liquid outlet end (5) is connected to an inclined guide frame (11) fixedly connected to the inner wall of the liquid inlet cavity (13).

2. The double-layer liquid medicine filter against bubbles and clogging according to claim 1, characterized in that: The diverter plate (10) is horizontally located on the diameter of the circular cross section of the liquid inlet (401), and the diverter plate (10) is rounded in the direction of the liquid inlet (401).

3. The double-layer liquid medicine filter against bubbles and clogging according to claim 1, characterized in that: The liquid outlet end (5) is provided with two liquid outlets (501) arranged opposite to each other, and the liquid outlets (501) are provided with a plurality of drainage columns (502).

4. The double-layer liquid medicine filter against bubbles and clogging according to claim 1, characterized in that: The flow guide frame (11) is connected to a plurality of support bodies (12) whose upper and lower ends abut against the first filter membrane (6) and the second filter membrane (7).

5. The double-layer liquid medicine filter against bubbles and clogging according to claim 4, characterized in that: The support body (12) is a sphere or a columnar body with rounded corners at both ends.

6. The double-layer liquid medicine filter against bubbles and clogging according to claim 1, characterized in that: The diverter plate (10) is a semicircular structure connected to the inner wall of the liquid inlet cavity (13), and the diverter plate (10) extends from the liquid inlet (401) toward the liquid outlet (5).

7. The double-layer liquid medicine filter against bubbles and clogging according to claim 1, characterized in that: The flow guide frame (11) is composed of a plurality of sheet-like structures inclined toward the liquid outlet end (5).

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