Built-in suck-back prevention drainage bag

Abstract

The utility model discloses a built-in suck-back prevention drainage bag, belongs to the technical field of medical equipment, and aims to solve the problems that a traditional drainage bag cannot be stably erected and easily topples over to cause backflow and suck-back. According to the technical scheme, an inner cavity of a bag body is divided into a liquid accumulation cavity, a negative pressure cavity and a liquid sealing cavity which are communicated with one another through partition pieces, the end, penetrating into the bag body, of a drainage tube is communicated with the liquid accumulation cavity, the negative pressure cavity is provided with a negative pressure connector, and the communicating position of the liquid sealing cavity and the liquid accumulation cavity is rotationally connected with a non-return piece; the center of gravity of the non-return part is located under the rotating axis of the non-return part, the groove is formed in the side wall of the middle position of the liquid sealing cavity and located below the non-return part, drainage of liquid can be guaranteed in the vertical state, liquid suck-back can be effectively prevented in the inclined or toppling state, the safety and use convenience of the drainage bag are improved, and the drainage bag is suitable for being used in a large-scale production line. And the risk of a patient caused by suck-back of the drainage bag is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, and more particularly to a built-in anti-backward suction bag. Background Art

[0002] In medical care, drainage bags are used to collect fluid from wounds or body cavities. Drainage bags are usually designed to be placed upright to ensure smooth flow of fluid and prevent backflow. However, traditional drainage bags cannot stand upright stably and are prone to tipping over, posing a risk of reflux and aspiration. This may pose a risk to patient health, increase the possibility of infection, and increase the workload of medical staff. Therefore, a new solution is needed to solve the problem of traditional drainage bags being unable to stand upright stably and being prone to tipping over, leading to reflux and aspiration. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a built-in anti-backflow suction bag, which can reduce the risk of backflow and back suction caused by the dumping of the drainage bag through the setting of the structure.

[0004] The above technical objectives of the present utility model are achieved through the following technical solutions: a built-in anti-backward suction bag, comprising a bag body and a drainage tube fixedly connected to the upper end opening of the bag body, characterized in that: a plurality of isolation parts are fixedly connected to the inner cavity of the bag body, and the inner cavity of the bag body is divided into a fluid accumulation chamber, a negative pressure chamber and a liquid seal chamber that are interconnected by the isolation parts, one end of the drainage tube passing through the bag body is connected to the fluid accumulation chamber, the negative pressure chamber is provided with a negative pressure interface, and a check piece is rotatably connected to the connection between the liquid seal chamber and the fluid accumulation chamber, and the check piece is in an open state when the bag body is upright, and the center of gravity of the check piece is located directly below its rotation axis, and a groove is provided on the side wall at the middle position of the liquid seal chamber, and the groove is located below the check piece.

[0005] The present invention is further configured such that: the rotation axis of the anti-return member is above the central axis thereof.

[0006] The utility model is further configured as follows: the lowest point of the liquid sealing cavity is located at the lowest point of the inner cavity of the bag body.

[0007] The utility model is further configured as follows: an auxiliary liquid sealing chamber is provided at the connection between the liquid sealing chamber and the negative pressure chamber, and the height of the connection between the auxiliary liquid sealing chamber and the negative pressure chamber is higher than the height of the connection between the auxiliary liquid sealing chamber and the liquid sealing chamber.

[0008] The utility model is further configured as follows: the connecting point between the liquid sealing cavity and the liquid accumulation cavity is cup-shaped.

[0009] The utility model is further configured as follows: the negative pressure interface is located near the upper end of the bag body, and the negative pressure interface is detachably connected to a sealing cover.

[0010] The utility model is further configured as follows: the liquid accumulation chamber is divided into a main liquid accumulation chamber and a secondary liquid accumulation chamber by an isolating member; the connection point between the main liquid accumulation chamber and the secondary liquid accumulation chamber is located near the upper end of the bag body; and the secondary liquid accumulation chamber is connected to the drainage pipe of the bag body.

[0011] In summary, the present invention has the following beneficial effects:

[0012] Through the structural layout of the inner cavity of the drainage bag and the use of gravity, liquid seal and negative pressure principles, it is possible to ensure the drainage of liquid in an upright state and effectively prevent liquid backflow in a tilted or tilted state, thereby maintaining the safety and integrity of the drainage system, improving the reliability and ease of use of the drainage bag, reducing the risks of patients due to backflow and backflow of the drainage bag, and providing medical staff with a more convenient management method. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 It is a cross-sectional view of the utility model;

[0015] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0016] In the figure: 1. bag body; 2. drainage tube; 3. isolation piece; 41. main fluid accumulation chamber; 42. auxiliary fluid accumulation chamber; 5. negative pressure chamber; 6. liquid seal chamber; 61. auxiliary liquid seal chamber; 7. negative pressure interface; 71. sealing cover; 8. groove; 9. check piece. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] Example:

[0019] like Figure 1-Figure 3As shown, the built-in anti-backflow suction bag includes a bag body 1 and a silicone drainage tube 2 fixed to the upper opening of the bag body 1. The bag body 1 is a low-pressure PE bag. The inner cavity of the bag body 1 is divided into a fluid accumulation chamber, a negative pressure chamber 5 and a liquid sealing chamber 6 that are interconnected by a PE isolation piece 3. One end of the drainage tube 2 penetrates the bag body 1 and is connected to the fluid accumulation chamber. The connection between the liquid sealing chamber 6 and the fluid accumulation chamber is cup-shaped, so that the path of liquid flowing from the fluid accumulation chamber to the liquid sealing chamber 6 is smoother, reducing the resistance to liquid flow, and facilitating the smooth entry of liquid into the liquid sealing chamber 6. It can also increase the time that liquid stays at the connection between the liquid sealing chamber 6 and the fluid accumulation chamber when the liquid flows back, reducing the liquid that directly flows back. The negative pressure chamber 5 is provided with a negative pressure interface 7, and the negative pressure interface 7 is configured with The sealing cover 71 is provided with a rotating shaft at the connection point between the liquid seal chamber 6 and the liquid accumulation chamber. The plate-shaped check piece 9 made of PE material is fixed by the rotating shaft. When the bag body 1 is upright, the check piece 9 is in an open state. The center of gravity of the check piece 9 is located directly below its rotation axis. The rotation axis of the check piece 9 is above its central axis, so the cross section above the rotation axis of the check piece 9 is lighter than the cross section below the rotation axis. The heavy end of the check piece 9 is vertically downward. When the bag body 1 is dumped or tilted, the check piece 9 can automatically rotate or close to prevent liquid from being sucked back. When the bag body 1 is upright, the check piece 9 can also play a diversion role at the connection point between the liquid seal chamber 6 and the liquid accumulation chamber, reduce the eddy current and turbulence when the liquid enters the liquid seal chamber, and stabilize the liquid level.

[0020] like Figure 2-Figure 3 As shown, a square groove 8 is provided on the side wall in the middle position of the liquid seal cavity 6, and the groove 8 is located below the check piece 9. When the bag body 1 is tilted, the liquid will first flow through the groove 8 and be stored in the groove 8, thereby reducing the amount of liquid flowing to the check piece 9 and reducing the reflux speed, so that the check piece 9 can be closed in time by gravity drive. The lowest point of the liquid seal cavity 6 is located at the lowest point of the inner cavity of the bag body 1, which is convenient for concentrating the liquid to the lowest point of the liquid seal cavity 6. When the bag body 1 is tilted, a certain liquid seal height can be maintained, which helps to gather liquid when tilting, form an effective liquid seal, prevent the liquid seal from being disconnected, and reduce the risk of backflow.

[0021] like Figure 2 As shown, an auxiliary liquid sealing chamber 61 is provided at the connection between the liquid sealing chamber 6 and the negative pressure chamber 5. The height of the connection between the auxiliary liquid sealing chamber 61 and the negative pressure chamber 5 is higher than the height of the connection between the auxiliary liquid sealing chamber 61 and the liquid sealing chamber 6. The liquid sealing liquid level of the liquid sealing chamber 6 is lowered at an inclined angle. The auxiliary liquid sealing chamber 61 can provide a second line of defense, which is conducive to forming a stable liquid seal in the liquid sealing chamber 6 and further enhancing the anti-backflow effect.

[0022] like Figure 2As shown, the liquid accumulation chamber is divided into a main liquid accumulation chamber 41 and a secondary liquid accumulation chamber 42 by an isolation member 3. The connection point between the main liquid accumulation chamber 41 and the secondary liquid accumulation chamber 42 is located near the upper end of the bag body 1. The secondary liquid accumulation chamber 42 is connected to the drainage pipe of the bag body 1. When the main liquid accumulation chamber 41 is full, the liquid flows into the secondary liquid accumulation chamber 42, and then the liquid is discharged by the drainage pipe of the bag body 1.

[0023] Working principle: Figure 1-Figure 3 As shown, when the bag body 1 is upright, the check piece 9 automatically opens because its center of gravity is lower than the rotation axis, allowing liquid to flow from the liquid accumulation chamber into the liquid seal chamber 6; when the bag body 1 is tilted or poured, the liquid will first flow through the groove 8 and be stored in the groove 8, reducing the amount of liquid flowing to the check piece 9 and reducing the reflux speed. The check piece 9 rotates due to gravity and closes the connection between the liquid accumulation chamber and the liquid seal chamber 6 to prevent liquid backflow. During the drainage process, the liquid seal chamber 6 is filled with liquid to form a liquid seal, and the auxiliary liquid seal chamber 61 enhances the liquid seal effect through the height difference, thereby preventing backflow.

[0024] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0025] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A built-in anti-backward suction bag, comprising a bag body (1) and a drainage tube (2) fixedly connected to the upper opening of the bag body (1), characterized in that: A plurality of isolating members (3) are fixedly connected to the inner cavity of the bag body (1). The inner cavity of the bag body (1) is divided into a fluid accumulation cavity, a negative pressure cavity (5) and a liquid sealing cavity (6) which are interconnected by the isolating members (3). One end of the drainage tube (2) penetrates into the bag body (1) and is connected to the fluid accumulation cavity. The negative pressure cavity (5) is provided with a negative pressure interface (7). A check member (9) is rotatably connected to the connection between the liquid sealing cavity (6) and the fluid accumulation cavity. When the bag body (1) is upright, the check member (9) is in an open state. The center of gravity of the check member (9) is located directly below its rotation axis. A groove (8) is provided on the side wall at the middle position of the liquid sealing cavity (6). The groove (8) is located below the check member (9).

2. The built-in anti-backflow suction bag according to claim 1, characterized in that: The rotation axis of the anti-return member (9) is above the central axis thereof.

3. The built-in anti-backflow suction bag according to claim 2, characterized in that: The lowest point of the liquid sealing cavity (6) is located at the lowest point of the inner cavity of the bag body (1).

4. The built-in anti-backflow suction bag according to claim 3, characterized in that: An auxiliary liquid sealing chamber (61) is provided at the connection point between the liquid sealing chamber (6) and the negative pressure chamber (5), and the height of the connection point between the auxiliary liquid sealing chamber (61) and the negative pressure chamber (5) is higher than the height of the connection point between the auxiliary liquid sealing chamber (61) and the liquid sealing chamber (6).

5. The built-in anti-backflow suction bag according to claim 2, characterized in that: The connecting point between the liquid sealing cavity (6) and the liquid accumulation cavity is cup-shaped.

6. The built-in anti-backflow suction bag according to claim 5, characterized in that: The negative pressure interface (7) is located near the upper end of the bag body (1), and the negative pressure interface (7) is detachably connected to a sealing cover (71).

7. The built-in anti-backflow suction bag according to claim 5, characterized in that: The liquid accumulation chamber is divided into a main liquid accumulation chamber (41) and a secondary liquid accumulation chamber (42) by an isolating member (3); the connection point between the main liquid accumulation chamber (41) and the secondary liquid accumulation chamber (42) is located near the upper end of the bag body (1); and the secondary liquid accumulation chamber (42) is connected to the drainage pipe of the bag body (1).

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