Drainage bag capable of preventing pipe from being blocked

By setting up multiple interfaces and valve core components on the drainage bag, the positive or uniform pressure interface is controlled to connect with the drainage pipe interface, the problem of drainage fluid stagnation is solved, the risk of separation operation and resource waste is reduced, and a safer and more efficient drainage process is achieved.

CN222871041UActive Publication Date: 2025-05-16THE UNIVERSITY OF HONG KONG SHENZHEN HOSPITAL
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Patent Information

Application Number
CN202421386384.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-17
Publication Date
2025-05-16
Estimated Expiration
2034-06-17

AI Technical Summary

Technical Problem

When existing drainage bags are used, drainage fluid is prone to stagnation in the drainage tube, leading to risk of plugging the tube and medical disputes. The operation of separation or replacement of drainage bags is complicated, increasing the risk of infection and waste of medical resources.

Method used

A drainage bag with anti-blocking pipe is designed, including multiple interfaces and valve core components, which are connected to the drainage pipe interface by controlling the positive pressure interface or uniform pressure interface. Instead of the operation of separating or replacing the drainage bag, the drainage liquid flows into the bag body by gravity.

Benefits of technology

It effectively avoids the stagnation of drainage fluid in the drainage tube, reduces the risk of infection and occupational exposure caused by separation operations, reduces the waste of medical resources, and simplifies the operation process.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of anti-blocking drainage bags, and provides an anti-blocking drainage bag which comprises a bag body, a drainage tube connector, a positive pressure connector, a uniform pressure connector and a valve element assembly, the drainage tube connector, the positive pressure connector, the uniform pressure connector and the valve element assembly are arranged on the bag body, the bag body is used for collecting drainage liquid, the drainage tube connector is communicated with the bag body, and the drainage tube connector is used for being communicated with a drainage tube. The positive pressure connector is used for being communicated with an injector or an extrusion ball, the uniform pressure connector is used for being communicated with the outside, and the valve element assembly is used for enabling one of the positive pressure connector and the uniform pressure connector to be communicated with the drainage tube connector. According to the utility model, the plurality of interfaces are arranged on the bag body, one of the positive pressure interface and the uniform pressure interface is controlled to be communicated with the drainage tube interface through the valve core assembly, and when drainage liquid is stopped in the drainage tube, one of the positive pressure interface and the uniform pressure interface can be communicated with the drainage tube interface; the operation of separating the drainage bag or replacing the drainage bag is replaced, drainage liquid in the drainage tube flows into the bag body under the action of gravity, and the operation of separating the drainage bag is avoided.
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Description

Technical Field

[0001] The present application relates to the technical field of anti-clogging drainage bags, and in particular to an anti-clogging drainage bag. Background Art

[0002] Gastrointestinal surgery patients usually have various drainage tubes left in place after surgery. The drainage tubes can be connected to drainage bags to collect drainage fluid. They are responsible for draining body fluids from the body into the drainage bags. However, there is a common problem with existing drainage systems: some drainage fluid will stagnate in the drainage tubes and not flow into the drainage bags. This not only increases the risk of tube blockage, but may also cause concerns among patients and their families. They may wonder if the drainage tubes are blocked, and even if medical staff explain, their concerns may not be completely eliminated, which may lead to medical disputes.

[0003] In order to solve the problem of drainage fluid stagnation in the tube, medical staff often need to separate the drainage bag or replace the drainage bag. But this process brings a series of new problems. First, the sealing cap needs to be opened during separation, which may lead to contamination of the connection between the drainage tube and the drainage bag, increasing the risk of infection. Secondly, the separation operation may cause liquid splashing due to improper force, posing a threat of occupational exposure to medical staff. In addition, the separation process may involve the patient's wound sutures, increasing the patient's postoperative pain. Finally, frequent separation, liquid pouring and disinfection operations not only waste medical resources, but also increase the workload of medical staff. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the present application is to provide a drainage bag that prevents tube blockage, aiming to solve the problem that the drainage fluid of the existing drainage bag is easily stagnant in the drainage tube when in use.

[0005] The technical solution adopted by the present application to solve the technical problem is as follows: a drainage bag for preventing tube blockage, comprising: a bag body, the bag body being used to collect drainage fluid;

[0006] A drainage tube interface, the drainage tube interface is connected to the bag body, and the drainage tube interface is used to communicate with the drainage tube;

[0007] A positive pressure interface, which is arranged on the bag body and is used to communicate with a syringe or a squeezing ball;

[0008] A pressure equalizing interface, wherein the positive pressure interface is arranged on the bag body, and the pressure equalizing interface is used to communicate with the outside world;

[0009] A valve core assembly is arranged on the bag body, and the valve core assembly is used to connect one of the positive pressure interface or the equal pressure interface with the drainage tube interface.

[0010] Furthermore, the drainage bag also includes: a three-way valve, the drainage tube interface, the positive pressure interface, the equal pressure interface and the valve core assembly are all arranged on the three-way valve, and the three-way valve has a valve cavity, the drainage tube interface and the bag body are respectively connected to the valve cavity, and the valve core assembly is used to connect one of the positive pressure interface or the equal pressure interface with the valve cavity.

[0011] Furthermore, the drainage bag further comprises: a connecting tube, the connecting tube being connected between the three-way valve and the bag body, and the valve cavity being connected with the bag body through the connecting tube;

[0012] A pressure equalizing tube is connected between the pressure equalizing interface and the bag body.

[0013] Furthermore, the diameter of the connecting pipe is larger than the diameter of the pressure equalizing pipe.

[0014] Furthermore, the drainage bag further comprises: a tube clamp, which is separately arranged from the bag body and is used to clamp the drainage tube to separate its two ends.

[0015] Furthermore, the tube clamp comprises: a tube clamp body, the tube clamp body is separately arranged from the bag body, and the tube clamp body has a clamping state for separating the two ends of the drainage tube and a loosening state for connecting the two ends of the drainage tube;

[0016] An indicator light is arranged on the pipe clamp body and is used to light up and go out according to the state of the pipe clamp body.

[0017] Furthermore, the tube clamp body further comprises: two electrode parts, the two electrode parts are arranged on the tube clamp body at intervals;

[0018] When the pipe clamp body is in a clamped state, the two electrode parts abut against each other and are connected;

[0019] When the pipe clamp body is in a loosened state, the two electrode parts are separated from each other and the circuit is disconnected.

[0020] Furthermore, the drainage bag also includes: a first one-way valve assembly, which is arranged on the equal pressure interface and is used to make the equal pressure interface unidirectionally conductive toward the valve cavity.

[0021] Furthermore, the drainage bag also includes: a second one-way valve assembly, which is arranged on the drainage tube interface and is used to make the drainage tube interface unidirectionally conductive toward the valve cavity.

[0022] Furthermore, the drainage bag further comprises: a sewage discharge interface, which is arranged at an end of the bag body away from the drainage tube interface, and the sewage discharge interface is connected to the bag body.

[0023] Compared with the prior art, the utility model provides multiple interfaces on the bag body, and controls one of the positive pressure interface or the equal pressure interface to be connected to the drainage tube interface through the valve core assembly. When the drainage fluid stagnates in the drainage tube, one of the positive pressure interface or the equal pressure interface can be connected to the drainage tube interface, thereby replacing the operation of separating the drainage bag or replacing the drainage bag. The drainage fluid in the drainage tube flows into the bag body under the action of gravity, thereby avoiding the operation of separating the drainage bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic diagram of the overall structure of a drainage bag for an anti-blocking tube provided in an embodiment;

[0026] Figure 2 It is a schematic diagram of the overall structure of a drainage bag of an anti-blocking tube provided by another embodiment;

[0027] Figure 3 The overall structure of a three-way valve provided by an embodiment is schematically shown;

[0028] Figure 4 The present invention is a schematic diagram of the overall structure of a pipe clamp provided by an embodiment.

[0029] In the figure: 100, bag body; 110, sewage discharge interface; 200, three-way valve; 210, drainage tube interface; 220, positive pressure interface; 230, equal pressure interface; 240, valve core assembly; 310, connecting pipe; 320, equal pressure pipe; 400, tube clamp; 410, tube clamp body; 420, indicator light; 430, electrode part; 510, first one-way valve assembly; 520, second one-way valve assembly; 610, drainage tube; 620, wound dressing; 630, squeezing ball. DETAILED DESCRIPTION

[0030] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0032] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In addition, the technical features involved in the different embodiments of the present invention described above can be combined with each other as long as they do not conflict with each other.

[0034] The utility model provides Figures 1 to 4 As shown in , a drainage bag with an anti-blocking tube is intended to solve the problem that the drainage fluid of the existing drainage bag is easily stagnant in the drainage tube 610 when in use.

[0035] The drainage bag of the anti-blocking tube mainly includes: a bag body 100, a drainage tube interface 210, a positive pressure interface 220, a uniform pressure interface 230 and a valve core assembly 240. The drainage tube interface 210 is connected to the bag body 100, and the bag body 100 is used to collect drainage fluid. The positive pressure interface 220, the positive pressure interface 220 and the valve core assembly 240 are respectively arranged on the bag body 100, and the valve core assembly 240 is used to make one of the positive pressure interface 220 or the uniform pressure interface 230 communicate with the drainage tube interface 210. Specifically, the drainage tube interface 210, the positive pressure interface 220 and the positive pressure interface 220 are all arranged at the upper end of the bag body 100 for easy operation.

[0036] Specifically, the valve core assembly 240 is connected to a handwheel assembly. When the medical staff needs to adjust the valve core assembly 240, the valve core assembly 240 can be controlled by rotating the handwheel assembly so that one of the positive pressure interface 220 or the equal pressure interface 230 is connected to the drainage tube interface 210. In actual use, the drainage tube interface 210 is connected to the drainage tube 610, and the drainage fluid in the drainage tube 610 flows into the drainage tube interface 210 through the drainage tube 610, and finally reaches the bag body 100 for storage. The positive pressure interface 220 is connected to the syringe or the squeezing ball 630, and the equal pressure interface 230 is connected to the outside world. It is generally known that when the drainage fluid in the drainage tube 610 is stagnant, the end of the drainage tube 610 facing the drainage bag is not connected to the outside world. Due to the atmospheric pressure, the gas in the drainage tube 610 and the drainage fluid do not move relative to each other, resulting in stagnation of the drainage fluid. At this time, the drainage tube 610 can be connected to the outside world by separating the drainage bag or replacing the drainage bag, so that the drainage fluid in the drainage tube 610 flows downward into the bag body 100 under the action of gravity. Therefore, when the drainage fluid stagnates in the drainage tube 610, the valve core assembly 240 can be controlled to make: 1. The equal pressure interface 230 is connected to the drainage tube interface 210, and the external gas can enter the drainage tube 610 at this time, so that the drainage fluid in the drainage tube 610 flows downward into the bag body 100 under the action of gravity; 2. The positive pressure interface 220 is connected to the drainage tube interface 210, and the positive pressure interface 220 is provided with positive pressure through the syringe or the squeezing ball 630, so that the gas in the syringe or the squeezing ball 630 can enter the drainage tube 610, so that the drainage fluid in the drainage tube 610 flows downward into the bag body 100 under the action of gravity.

[0037] In order to solve the problem of drainage fluid stagnation in the tube, medical staff often need to separate the drainage bag or replace the drainage bag. But this process brings a series of new problems. First, the sealing cap needs to be opened during separation, which may cause contamination of the connection between the drainage tube 610 and the drainage bag, increasing the risk of infection. Secondly, the separation operation may cause liquid splashing due to improper force, posing a threat of occupational exposure to medical staff. In addition, the separation process may involve the patient's wound sutures, increasing the patient's postoperative pain. Finally, frequent separation, liquid pouring and disinfection operations not only waste medical resources, but also increase the workload of medical staff.

[0038] The utility model sets a plurality of interfaces on the bag body 100, and controls one of the positive pressure interface 220 or the equal pressure interface 230 to be connected to the drainage tube interface 210 through the valve core assembly 240. When the drainage fluid stagnates in the drainage tube 610, one of the positive pressure interface 220 or the equal pressure interface 230 can be connected to the drainage tube interface 210, thereby replacing the operation of separating the drainage bag or replacing the drainage bag. The drainage fluid in the drainage tube 610 flows into the bag body 100 under the action of gravity, thereby avoiding the operation of separating the drainage bag.

[0039] In some embodiments, Figures 1 to 3 As shown in , the drainage bag also includes: a three-way valve 200, a drainage tube interface 210, a positive pressure interface 220, a uniform pressure interface 230 and a valve core assembly 240 are all arranged on the three-way valve 200, and the three-way valve 200 has a valve cavity, the drainage tube interface 210 and the bag body 100 are respectively connected to the valve cavity, and the valve core assembly 240 is used to make one of the positive pressure interface 220 or the uniform pressure interface 230 connected to the valve cavity. It is convenient for medical staff not to touch the bag body 100 when connecting the drainage tube interface 210, the positive pressure interface 220, the uniform pressure interface 230 or controlling the valve core assembly 240, so as not to affect the backflow of the drainage fluid.

[0040] In some embodiments, Figures 1 to 3 As shown in , the drainage bag also includes: a connecting tube 310 and a pressure-equalizing tube 320. The connecting tube 310 is connected between the three-way valve 200 and the bag body 100, the valve cavity is communicated with the bag body 100 through the connecting tube 310, and the pressure-equalizing tube 320 is connected between the pressure-equalizing interface 230 and the bag body 100. Specifically, the connecting tube 310 is used to guide the drainage liquid in the valve cavity to the bag body 100, and the pressure-equalizing tube 320 is used to guide the gas in the bag body 100 to the valve cavity. A complete gas-liquid channel can be formed by the connecting tube 310 and the pressure-equalizing tube 320, so that when the drainage liquid in the valve cavity flows into the bag body 100 through the connecting tube 310, the gas in the bag body 100 reaches the valve cavity through the pressure-equalizing tube 320, so that the drainage liquid in the valve cavity can easily flow into the bag body 100 without stagnation. At this time, it is equivalent to the effect of separating the drainage bag from the drainage tube 610, reducing the occurrence of stagnation of the drainage liquid in the drainage tube 610.

[0041] In some embodiments, the diameter of the connecting tube 310 is larger than the diameter of the pressure equalizing tube 320 , and the drainage fluid in the valve cavity will preferentially flow into the bag body 100 through the connecting tube 310 .

[0042] In some embodiments, Figure 1 , Figure 2 as well as Figure 4 As shown in , the drainage bag further includes: a tube clamp 400, which is separately arranged from the bag body 100, and is used to clamp the drainage tube 610 to separate its two ends.

[0043] During actual use, the wound dressing 620 is first fixed on the patient's skin, and then the two ends of the drainage tube 610 are respectively connected to the wound dressing 620 and the bag body 100. The wound dressing 620 can be separated from the bag body 100 by the tube clamp 400, so that it is convenient for medical staff to replace the bag body 100 without replacing the wound dressing 620.

[0044] In some embodiments, Figure 1 , Figure 2 as well as Figure 4 As shown in , the tube clamp 400 includes: a tube clamp body 410, which is separated from the bag body 100, and the tube clamp body 410 has a clamping state that separates the two ends of the drainage tube 610 and a loosening state that connects the two ends of the drainage tube 610;

[0045] The indicator light 420 is disposed on the pipe clamp body 410 , and the indicator light 420 is used to light up and go out according to the state of the pipe clamp body 410 .

[0046] In some embodiments, Figure 1 , Figure 2 as well as Figure 4 As shown in , the tube clamp body 410 further includes: two electrode parts 430, and the two electrode parts 430 are arranged on the tube clamp body 410 at intervals;

[0047] When the tube clamp body 410 is in a clamped state, the two electrode parts 430 abut against each other and are connected;

[0048] When the tube clamp body 410 is in a loosened state, the two electrode portions 430 are separated from each other and disconnected.

[0049] Specifically, the tube clamp body 410 is a conventional drainage tube 610 tube clamp 400, such as the Robert tube clamp 400. When it is fixed on the drainage tube 610, its two ends are interlocked and form a ring structure sleeved on the drainage tube 610. The two electrode parts 430 are respectively arranged at its two ends. At this time, since the two ends are interlocked and abutted, the two electrode parts 430 abut each other and conduct, otherwise the two electrode parts 430 are separated from each other and disconnected. The two electrode parts 430 can be used as switches.

[0050] In actual use, the switch state of the tube clamp 400 is not obvious and difficult to observe. When the tube clamp 400 is closed, the drainage fluid in the drainage tube 610 will not flow into the drainage bag. However, if the tube clamp 400 is forgotten to be opened, it may cause discomfort to the patient. Specifically, the tube clamp body 410 also includes: a battery, a battery, two electrode parts 430 and an indicator light 420 are connected in series in sequence. When the two electrode parts 430 abut against each other and are turned on, the indicator light 420 turns on, so that medical staff can clearly see the state of the tube clamp 400 during night rounds. In addition, the indicator light 420 can use a red light so that it is easy to identify at a glance whether the tube clamp 400 is in a clamped state during night rounds.

[0051] In some embodiments, Figures 1 to 3 As shown in , the drainage bag further includes: a first one-way valve assembly 510, which is disposed on the pressure equalizing interface 230, and is used to make the pressure equalizing interface 230 unidirectionally conductive toward the valve cavity.

[0052] Specifically, when there is too much drainage fluid in the valve cavity, the drainage fluid may submerge the connecting tube 310 and the pressure equalizing tube 320 at the same time. By setting the first one-way valve assembly 510, the drainage fluid can be prevented from entering the bag body 100 through the pressure equalizing tube 320, thereby preventing the drainage fluid from stagnating in the connecting tube 310 and the pressure equalizing tube 320, thereby ensuring the safety of the patient.

[0053] In some embodiments, Figures 1 to 3 As shown in , the drainage bag further includes: a second one-way valve assembly 520, which is disposed on the drainage tube interface 210, and is used to make the drainage tube interface 210 unidirectionally conductive toward the valve cavity.

[0054] Specifically, when the positive pressure interface 220 is connected to the syringe or the squeezing ball 630, the positive pressure of the positive pressure interface 220 can be increased through the syringe or the squeezing ball 630. At this time, the drainage fluid in the drainage tube 610 will flow back, and even the gas in the valve cavity will enter the patient's body through the drainage tube 610. By setting a second one-way valve assembly 520, the above situation can be avoided and the patient's safety can be ensured.

[0055] In some embodiments, Figure 1 to Figure 2 As shown in , the drainage bag further includes: a drainage interface 110, which is arranged at one end of the bag body 100 away from the drainage tube interface 210, and the drainage interface 110 is connected to the bag body 100. In actual use, the drainage liquid in the bag body 100 can be taken out or emptied through the drainage interface 110.

[0056] In summary, a drainage bag with an anti-blocking tube is provided, including a bag body and a drainage tube interface, a positive pressure interface, a uniform pressure interface and a valve core assembly arranged on the bag body. The bag body is used to collect drainage fluid, the drainage tube interface is connected to the bag body, the drainage tube interface is used to communicate with the drainage tube, the positive pressure interface is used to communicate with a syringe or a squeeze ball, the uniform pressure interface is used to communicate with the outside world, and the valve core assembly is used to connect one of the positive pressure interface or the uniform pressure interface with the drainage tube interface. The utility model provides multiple interfaces on the bag body, and controls one of the positive pressure interface or the uniform pressure interface to be connected to the drainage tube interface through the valve core assembly. When the drainage fluid stagnates in the drainage tube, one of the positive pressure interface or the uniform pressure interface can be connected to the drainage tube interface, thereby replacing the operation of separating the drainage bag or replacing the drainage bag. The drainage fluid in the drainage tube flows into the bag body under the action of gravity, thereby avoiding the operation of separating the drainage bag.

[0057] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A drainage bag for preventing tube blockage, characterized in that: include: A bag body, the bag body is used to collect drainage fluid; A drainage tube interface, the drainage tube interface is connected to the bag body, and the drainage tube interface is used to communicate with the drainage tube; A positive pressure interface, which is arranged on the bag body and is used to communicate with a syringe or a squeezing ball; A pressure equalizing interface, wherein the positive pressure interface is arranged on the bag body, and the pressure equalizing interface is used to communicate with the outside world; A valve core assembly is arranged on the bag body, and the valve core assembly is used to connect one of the positive pressure interface or the equal pressure interface with the drainage tube interface.

2. The drainage bag for preventing clogging of the tube according to claim 1, characterized in that: The drainage bag also includes: a three-way valve, the drainage tube interface, the positive pressure interface, the equal pressure interface and the valve core assembly are all arranged on the three-way valve, and the three-way valve has a valve cavity, the drainage tube interface and the bag body are respectively connected to the valve cavity, and the valve core assembly is used to connect one of the positive pressure interface or the equal pressure interface with the valve cavity.

3. The drainage bag for preventing clogging of the tube according to claim 2, characterized in that: The drainage bag further comprises: a connecting tube, the connecting tube being connected between the three-way valve and the bag body, the valve cavity being connected with the bag body through the connecting tube; A pressure equalizing tube is connected between the pressure equalizing interface and the bag body.

4. The drainage bag for preventing clogging of the tube according to claim 3, characterized in that: The diameter of the connecting pipe is larger than the diameter of the pressure equalizing pipe.

5. The drainage bag for preventing clogging of the tube according to claim 1, characterized in that: The drainage bag further comprises: a tube clamp, which is arranged separately from the bag body and is used for clamping the drainage tube to separate its two ends.

6. The drainage bag for preventing clogging of the tube according to claim 5, characterized in that: The tube clamp comprises: a tube clamp body, which is arranged separately from the bag body, and has a clamping state for separating the two ends of the drainage tube and a loosening state for connecting the two ends of the drainage tube; An indicator light is arranged on the pipe clamp body and is used to light up and go out according to the state of the pipe clamp body.

7. The drainage bag for preventing clogging of the tube according to claim 6, characterized in that: The pipe clamp body further comprises: two electrode parts, the two electrode parts are arranged on the pipe clamp body at intervals; When the pipe clamp body is in a clamped state, the two electrode parts abut against each other and are connected; When the pipe clamp body is in a loosened state, the two electrode parts are separated from each other and the circuit is disconnected.

8. The drainage bag for preventing clogging of the tube according to claim 3, characterized in that: The drainage bag further comprises: a first one-way valve assembly, wherein the first one-way valve assembly is arranged on the equal pressure interface, and the first one-way valve assembly is used to make the equal pressure interface unidirectionally conduct toward the valve cavity.

9. The drainage bag for preventing clogging of the tube according to claim 8, characterized in that: The drainage bag further comprises: a second one-way valve assembly, wherein the second one-way valve assembly is arranged on the drainage tube interface, and the second one-way valve assembly is used to make the drainage tube interface unidirectionally conductive toward the valve cavity.

10. The drainage bag for anti-blocking tube according to any one of claims 1 to 9, characterized in that: The drainage bag further comprises: a sewage discharge interface, which is arranged at an end of the bag body away from the drainage tube interface, and the sewage discharge interface is communicated with the bag body.