A layered rapid drainage bag

Abstract

This utility model provides a layered rapid drainage bag, belonging to the technical field of drainage bags. The bag body is made of a flexible film material, and a layered partition is provided inside the bag body. The layered partition divides the internal space of the bag body into an upper chamber and a lower chamber. The layered partition extends along the width direction of the bag body. One end of the layered partition is fixedly connected to the side wall of the bag body, and the other end of the layered partition is a free end. The drainage tube passes through the bottom of the bag body and extends into the lower chamber. The top end of the drainage tube is located in the lower chamber and is higher than the bottom of the bag body. A liquid passage gap is formed between the free end of the layered partition and the opposite side wall of the bag body. This realizes automatic stratification and sedimentation of liquid and rapid continuous drainage, which significantly improves the drainage quality and drainage speed compared with the prior art and reduces drainage interruption caused by blockage.

Description

Technical Field

[0001] This utility model belongs to the field of drainage bag technology, specifically, it relates to a layered rapid drainage bag. Background Technology

[0002] In the field of industrial liquid handling, liquid bags are widely used as containers for collecting and draining liquids. Traditional liquid bags are usually made of flexible film materials, with drainage tubes connected to the bottom or sides for liquid discharge. This simple structure can meet basic requirements when handling clean liquids. However, in practical applications, many liquids that need to be collected and drained contain suspended particles or will produce sediment. Industrial waste liquids may contain solid particles and flocculent precipitates. These solid substances are easily introduced into the drainage tube along with the liquid during the drainage process, adhering to the inner wall of the drainage tube or accumulating in narrow places of the pipe, gradually forming blockages, resulting in a significant decrease in drainage speed or even complete blockage. To solve the blockage problem, existing technologies typically employ... Increasing the inner diameter of the drainage tube is one method, but this reduces the drainage speed and only delays blockage without fundamentally solving the problem. Another method is to add a filter at the inlet of the drainage tube, but the filter itself is easily clogged and requires regular cleaning, increasing maintenance workload. Some technical solutions use multi-stage sedimentation, separating solid particles step by step through multiple series sedimentation chambers, but this solution is complex, costly, and space-consuming, making it unsuitable for disposable liquid bag products. Furthermore, existing liquid bags lack effective control over liquid flow rate and path; the liquid directly impacts the drainage tube inlet from the inlet, and the solid-liquid mixture is drawn out before it can be separated, reducing the cleanliness of the drainage liquid. In other words, existing technologies suffer from the technical problem of suspended particles or sediment in the liquid clogging the drainage pipe, leading to a decrease in drainage speed or even interruption of drainage. Utility Model Content

[0003] In view of this, the present invention provides a layered rapid drainage liquid bag, which can solve the technical problem that existing liquid bags are prone to clogging the drainage pipe during the drainage process due to suspended particles or sediments in the liquid, resulting in a decrease in drainage speed or even interruption of drainage.

[0004] This utility model is implemented as follows: This utility model provides a layered rapid drainage bag. The bag body is made of a flexible film material. A layered partition is provided inside the bag body, which divides the internal space of the bag body into an upper chamber and a lower chamber. The layered partition extends along the width direction of the bag body. One end of the layered partition is fixedly connected to the side wall of the bag body, and the other end of the layered partition is a free end. The drainage tube passes through the bottom of the bag body and extends into the lower chamber. The top end of the drainage tube is located in the lower chamber and is higher than the bottom of the bag body. A fluid passage gap is formed between the free end of the layered partition and the opposite side wall of the bag body. By setting a layered partition inside the bag to divide the internal space into an upper chamber and a lower chamber, with one end of the partition fixed and the other end free to form a liquid passage gap, the liquid first enters the upper chamber and then flows into the lower chamber through the liquid passage gap before being discharged through the drainage tube. This achieves stratified sedimentation and directional drainage of the liquid. When the liquid contains suspended particles or sediment, the upper chamber acts as a buffer zone, allowing the particles to settle under gravity. The clear liquid preferentially enters the lower chamber through the liquid passage gap and is quickly discharged through the drainage tube, avoiding blockage of the drainage tube by particles and improving drainage efficiency and continuity.

[0005] The layered partition has an arc-shaped plate structure, with its convex arc facing the upper chamber and its concave arc facing the lower chamber. This arc-shaped structure allows for smoother liquid flow within the upper chamber. The liquid flows slowly towards the liquid-passing gap along the guiding effect of the concave arc, increasing the residence time of the liquid in the upper chamber and facilitating the full settling of suspended particles. Simultaneously, the arc-shaped structure enhances the structural strength of the partition, preventing deformation under liquid pressure and ensuring the stability of the liquid-passing gap width, thus guaranteeing the controllability and uniformity of the drainage process.

[0006] The width of the liquid-permeable slit gradually increases along the height of the bag body, with the width near the bottom of the bag body being greater than the width near the fixed end of the layered partition. This gradual increase in slit width along the height of the bag body, with the width near the bottom being greater than the width near the fixed end, allows the liquid flow rate to gradually increase from top to bottom. The narrower slit at the top acts as a throttling mechanism, prolonging the settling time of the liquid in the upper chamber, while the wider slit at the bottom accelerates the speed at which the liquid enters the lower chamber, forming a reasonable flow rate gradient. This ensures both the layering effect and improves the overall drainage speed, avoiding poor drainage caused by liquid stagnation within the bag body.

[0007] The drainage tube has multiple drainage holes at its top end, evenly distributed along its circumference, each hole being elliptical in shape. This arrangement increases the number of channels for liquid to enter the tube, improving its suction capacity. The major axis of the elliptical holes can be optimized according to the liquid flow direction, reducing resistance when liquid enters the orifice. Furthermore, the multi-hole distribution avoids the risk of drainage interruption due to blockage by sediment at a single inlet. Even if some drainage holes are blocked, the remaining holes can still maintain drainage function, improving the reliability and continuous operation of the device.

[0008] The free end edge of the layered partition has a serrated structure, with the tips of the serrations facing the opposite sidewall of the bag body, and a groove formed between adjacent tips. The serrated structure and the alternating arrangement of the tips and grooves increase the effective length of the liquid flow gap, making the liquid flow path more tortuous, further slowing down the liquid flow rate and enhancing particle settling. Simultaneously, the micro-disturbance generated by the serrated structure prevents fine particles from accumulating and clogging the gap, and the local vortex area formed by the groove helps push settled particles away from the gap, maintaining the unobstructed flow of the liquid flow gap and improving anti-clogging performance during long-term use.

[0009] The bag body has a liquid inlet located at the top center of the upper chamber, with its opening direction perpendicular to the extension direction of the layered partition. This arrangement ensures that the incoming liquid first impacts the top area of ​​the upper chamber rather than directly impacting the layered partition, preventing splashing and disturbance caused by direct liquid flow. The liquid diffuses evenly from the center outwards before settling, creating a stable laminar flow that promotes orderly settling of suspended particles. Furthermore, the opening direction perpendicular to the layered partition reduces disturbance to the liquid near the flow gaps during liquid inflow, ensuring the stability of the stratified flow process.

[0010] The portion of the drainage tube outside the bag has a spiral structure with 3 to 5 turns, and the spiral diameter gradually decreases along the drainage direction. This spiral structure increases the flexibility and tensile strength of the drainage tube. Even if the drainage tube is subjected to external force or bending during use, the elastic deformation of the spiral structure buffers the force, preventing the drainage tube from detaching or breaking at the connection point with the bag. Simultaneously, the spiral structure facilitates storage and fixation, reducing the space occupied by the drainage tube. The gradually decreasing spiral diameter design generates a moderate centrifugal force when the liquid flows within the spiral tube, helping to separate residual micro-air bubbles in the liquid.

[0011] The thickness of the layered partition is less than the thickness of the bag sidewall. The connection between the layered partition and the bag sidewall is fixed by heat fusion bonding, and the connection line formed by the heat fusion bonding is straight. The thinner thickness of the layered partition compared to the bag sidewall gives it better flexibility, allowing for slight elastic deformation when liquid pressure changes, thus adjusting the width of the liquid flow gap and achieving adaptive regulation of the liquid flow. The heat fusion bonding ensures the airtightness and liquid tightness of the connection, preventing liquid leakage. The straight connection line minimizes the bonding area, reducing the amount of adhesive used. Simultaneously, the straight connection ensures uniform stress on the layered partition, improving the strength and durability of the connection.

[0012] The bag is made of polyvinyl chloride (PVC) film and is flat in its unfilled state. The two opposing main surfaces of the bag are sealed together at the perimeter using a heat-sealing method. The PVC film material provides good flexibility and transparency, facilitating observation of the liquid state and level within the bag. The flat design minimizes space requirements during storage and transportation, making it easy to package in bulk and carry. The heat-sealing of the two opposing main surfaces creates a sealed containment space. This method is simple, reliable, and provides excellent sealing performance, preventing liquid leakage and the entry of external contaminants. Furthermore, the flat bag expands sufficiently after filling with liquid to accommodate different liquid capacities.

[0013] The drainage tube is made of silicone material. A reinforcing ring is provided at the connection between the drainage tube and the bottom of the bag. The inner diameter of the reinforcing ring matches the outer diameter of the drainage tube. The reinforcing ring is embedded in the opening at the bottom of the bag and forms a sealed connection with the bottom of the bag. The drainage tube is made of silicone material, which has good biocompatibility and chemical stability and will not react with most liquids. The reinforcing ring at the connection between the drainage tube and the bottom of the bag, with its inner diameter matching the outer diameter of the drainage tube, allows the drainage tube to be tightly embedded in the reinforcing ring. The reinforcing ring is embedded in the opening at the bottom of the bag and forms a sealed connection with the bottom of the bag. This double fixing method significantly improves the mechanical strength and sealing performance at the connection between the drainage tube and the bag, preventing the drainage tube from falling off or leaking at the connection under liquid pressure or external force. The reinforcing ring also plays a role in dispersing stress, preventing the drainage tube from being damaged due to stress concentration at the connection.

[0014] This invention divides the bag into upper and lower chambers by installing a layered partition with one end fixed and the other free inside the bag. The liquid first enters the upper chamber and undergoes initial solid-liquid separation under gravity. The clear liquid flows into the lower chamber through the liquid passage gap formed between the layered partition and the side wall of the bag, while the sediment remains at the bottom of the upper chamber. The drainage tube is located in the lower chamber with its top end higher than the bottom of the bag, ensuring that only the settled clear liquid is drained, effectively preventing sediment from entering the drainage tube and causing blockage. The layered partition adopts an arc-shaped structure combined with a gradually wide liquid passage gap, optimizing the liquid flow path and velocity distribution, ensuring sufficient settling time and improving the overall drainage speed. The serrated structure at the free end further enhances the anti-clogging effect, and the multiple elliptical drainage holes at the top of the drainage tube increase the liquid absorption channel, improving drainage efficiency and reliability. The overall solution realizes automatic stratified settling and rapid continuous drainage of the liquid, significantly improving drainage quality and speed compared to existing technologies, reducing drainage interruptions caused by blockage, and extending the continuous working time of the liquid bag. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the drainage bag involved in this utility model.

[0016] Figure 2 This is a diagram illustrating the structure of the free end of the layered partition and the fluid-passing gap of this utility model.

[0017] Figure 3 This is a detailed structural description of the top end of the drainage tube and the drainage hole of this utility model.

[0018] In the attached drawings, the reference numerals are as follows: 00, bag body; 01, liquid inlet; 02, upper chamber; 03, fixed end; 04, free end; 05, layered partition; 06, liquid passage gap; 07, lower chamber; 08, drainage tube; 081, top of drainage tube; 082, drainage hole; 09, reinforcing ring; 10, spiral structure; 11, hot-melt adhesive connection line; 12, arc-shaped convex surface; 13, arc-shaped concave surface; 14, layered partition thickness; 15, tooth tip; 16, groove; 17, width of the first gap; 18, width of the second gap; 19, liquid flow direction at the liquid passage gap; 20, liquid flow direction; 21, circumferentially uniformly distributed structure; 22, sealing connection; 23, bottom of the bag body. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0020] like Figures 1-3 As shown, the layered rapid drainage bag provided by this utility model has a bag body made of flexible film material. The bag body is made of flexible film material and has a layered partition 05 inside. The layered partition 05 divides the internal space of the bag body into an upper chamber 02 and a lower chamber 07. The layered partition 05 extends along the width direction of the bag body. One end of the layered partition 05 is a fixed end 03, which is fixedly connected to the side wall of the bag body. The other end of the layered partition 05 is a free end 04. The drainage tube 08 penetrates the bottom of the bag body and extends into the lower chamber 07. The top end of the drainage tube 08, i.e., the top end 081 of the drainage tube 08, is located in the lower chamber 07 and is higher than the bottom of the bag body. A fluid passage gap 06 is formed between the free end 04 of the layered partition 05 and the opposite side wall of the bag body. The layered partition 05 has an arc-shaped plate structure, with its convex arc-shaped surface facing the upper chamber 02 and its concave arc-shaped surface facing the lower chamber 07. The width of the fluid passage gap 06 gradually increases along the height of the bag body, and the width of the fluid passage gap 06 near the bottom of the bag body is greater than the width near the fixed end 03 of the layered partition 05. The top end 081 of the drainage tube has multiple drainage holes 082, which are evenly distributed circumferentially along the drainage tube 08, and each drainage hole 082 is elliptical. The free end 04 of the layered partition 05 has a serrated edge structure, with the tips of the serrations facing the opposite sidewall of the bag body, and a groove formed between adjacent tips. The upper part of the bag body is provided with a liquid inlet 01, which is located at the top center of the upper chamber 02, and the opening direction of the liquid inlet 01 is perpendicular to the extension direction of the layered partition 05.

[0021] The specific operation or use method of this utility model is as follows: First, the liquid bag is suspended or placed in a suitable position, ensuring that the bag is in a vertical or nearly vertical state, so that the layered partition 05 extends in a horizontal or nearly horizontal direction. The end of the drainage tube 08 is connected to a collection container or discharge pipe. The liquid to be drained is injected into the bag through the liquid inlet 01. The liquid first enters the upper chamber 02. As the liquid is continuously injected, the liquid level gradually rises. The suspended particles and sediments in the liquid begin to settle downwards under the action of gravity and accumulate in the bottom area of ​​the upper chamber 02. The clear liquid that has settled sufficiently flows from the upper part of the upper chamber 02 through the liquid passage gap 06 between the free end 04 of the layered partition 05 and the side wall of the bag into the lower chamber 07. The clear liquid entering the lower chamber 07 flows through the liquid passage gap 06 between the free end 04 of the layered partition 05 and the side wall of the bag. The liquid enters the drainage tube 08 through multiple drainage holes 082 at the top of the drainage tube 081, flows downward along the drainage tube 08 and is discharged from the bag. The entire drainage process continues. When the liquid level in the upper chamber 02 reaches a certain height, the gravitational potential energy of the liquid pushes the clear liquid to continuously flow into the lower chamber 07 through the liquid passage slit 06 and be discharged through the drainage tube 08, forming a stable drainage state. No manual intervention is required during use. The sediment will continue to accumulate at the bottom of the upper chamber 02 and will not enter the lower chamber 07 and the drainage tube 08. When the drainage is completed or the liquid bag needs to be replaced, first close the liquid inlet 01. After the liquid in the bag is basically emptied, disconnect the drainage tube 08 from the collection container and remove the liquid bag for processing. The whole operation process is simple and convenient, without the need for additional equipment and complicated operating steps.

[0022] Specifically, the principle of this invention is as follows: It utilizes the principle of gravity sedimentation to achieve the natural separation of solid particles and clear liquid in a liquid. By setting a layered partition inside the bag, the space is divided into two chambers with different functions. The upper chamber serves as a sedimentation buffer; after the liquid enters, the flow rate decreases, and suspended particles settle downwards under gravity and accumulate at the bottom of the upper chamber. The clear liquid remains in the upper region of the upper chamber. One end of the layered partition is fixedly connected to the side wall of the bag to provide stable support, while the other end is a free end, forming a controllable width liquid-permeable slit with the opposite side wall. This slit is located in the upper-middle part of the upper chamber. Only the settled clear liquid can flow into the lower chamber through the slit. The settled particles are blocked in the upper chamber because they are located below the slit. The lower chamber serves as a clear liquid collection and drainage area, with a drainage pipe installed in the lower chamber. The tube opening is higher than the bottom of the bag, further preventing sediment from being sucked in. The layered partition adopts an arc-shaped structure, and the guiding effect of the arc surface makes the liquid flow more gentle and orderly, prolonging the settling time. The gradual design of the liquid passage gap width along the height direction creates a flow velocity gradient. The structure of being narrow at the top and wide at the bottom not only limits the liquid from passing through too quickly but also ensures the overall drainage efficiency. The serrated structure at the free end increases the effective length of the gap and generates micro-disturbance, preventing fine particles from accumulating in the gap. The multi-hole distribution design at the top of the drainage tube increases the liquid absorption area, reduces the load on a single hole, and reduces the risk of clogging. All these technical features work together to form an automatic solid-liquid separation and continuous drainage system. It does not require external power or complex control, and can achieve efficient layered drainage by relying solely on the liquid's own gravity and flow characteristics. The entire process is stable and reliable.

[0023] The following provides a specific embodiment 1 of the present invention. The specific implementation method of each step in this embodiment 1 is described in detail below.

[0024] In this embodiment, the layered rapid drainage bag is made of 0.3mm thick polyvinyl chloride film. The bag has a flat rectangular structure, with a length of 350mm and a width of 250mm. The two opposing main surfaces are sealed together by heat sealing at the perimeter, with a heat seal width of 15mm, forming a sealed containment space. The bag has a capacity of approximately 2000ml. The layered partition 05 is also made of 0.2mm thick polyvinyl chloride film. The layered partition 05 has an arc-shaped plate structure with a radius of curvature of 400mm. The layered partition 05 is 240mm long and extends along the width of the bag. The convex surface of the layered partition 05 faces the upper chamber 02, and the concave surface faces the lower chamber 07. One end of the layered partition 05, i.e., the fixed end 03, is fixedly connected to one side wall of the bag by heat fusion bonding. The bonding line is 240mm long, vertically straight, and 8mm wide. The other end of 5 is a free end 04. A liquid-permeable gap 06 is formed between the free end 04 and the opposite side wall of the bag body. The width of the liquid-permeable gap 06 is 5 mm near the fixed end 03 of the layered partition 05. The width of the liquid-permeable gap 06 gradually increases downward along the height of the bag body, and increases to 12 mm near the bottom of the bag body. The edge of the free end 04 of the layered partition 05 is processed into a serrated structure with a tooth height of 3 mm, a tooth pitch of 8 mm, and a total of about 30 teeth. The pointed teeth face the opposite side wall of the bag body, and an arc-shaped groove is formed between adjacent teeth. An inlet 01 is set at the upper center of the bag body. The inlet 01 is a circular opening with a diameter of 25mm. A soft rubber sealing ring is set around the inlet 01 to facilitate connection with the infusion tube or injector. The axis of the inlet 01 is perpendicular to the extension direction of the layered partition 05. The drainage tube 08 is made of silicone material. The inner diameter of the drainage tube 08 is 6mm, the outer diameter is 9mm, and the wall thickness is 1.A 5mm drainage tube 08 penetrates the bottom center of the bag, with an 80mm length inside the bag. The top of the drainage tube 08 081 is located 30mm above the bottom of the bag within the lower chamber 07. Six elliptical drainage holes 082 are evenly distributed around the top of the drainage tube 081, each with a major axis of 4mm and a minor axis of 2mm. The major axis is parallel to the axis of the drainage tube 08. A reinforcing ring 09 made of polyvinyl chloride is installed at the connection between the drainage tube 08 and the bottom of the bag. The reinforcing ring 09 has an inner diameter of 9mm, an outer diameter of 15mm, and a thickness of 2mm. The reinforcing ring 09 is embedded in a pre-drilled circular hole at the bottom of the bag. The drainage tube 08 passes through the reinforcing ring 09, and the drainage tube 08, reinforcing ring 09, and bottom of the bag are securely connected by ultrasonic welding. The components are firmly connected together to form a sealed and secure connection structure. The portion of the drainage tube 08 outside the bag body has a spiral structure 10 with 4 turns. The initial spiral diameter is 40mm, gradually decreasing to 25mm at the end along the drainage direction, with a spiral pitch of 30mm. The spiral structure 10 increases the flexibility and tensile strength of the drainage tube 08. The end of the drainage tube 08 is beveled for easy insertion into a collection container. The entire liquid bag is flat and approximately 10mm thick when not filled, facilitating storage and transportation. In use, the liquid bag is suspended on a hook, and liquid is injected through the inlet 01. After sedimentation and separation in the upper chamber 02, the clear liquid enters the lower chamber 07 through the liquid passage slit 06 and is then discharged through the drainage tube 08, achieving efficient stratified drainage.

[0025] To better understand and implement this utility model, the following is a specific application scenario of Embodiment 2: Embodiment 2 is based on Embodiment 1, with improvements made to the structure of the layered partition 05. Three reinforcing ribs are arranged along the length of the concave surface of the layered partition 05. Each reinforcing rib is a strip-shaped protrusion with a height of 2mm and a width of 5mm. The three reinforcing ribs are parallel to each other and extend along the length of the layered partition 05. The spacing between the reinforcing ribs is 60mm. The reinforcing ribs are made of the same polyvinyl chloride material as the layered partition 05 using an integral molding process. The addition of the reinforcing ribs significantly improves the structural strength and deformation resistance of the layered partition 05, enabling it to withstand higher liquid pressures. The structure of the reinforcing ribs ensures the stability of the shape of the layered partition 05, preventing excessive sagging under the weight of the liquid and ensuring the consistency of the width of the liquid passage gap 06. Simultaneously, the raised structure of the reinforcing ribs guides the liquid flow within the lower chamber 07, allowing the liquid in the lower chamber 07 to flow more evenly towards the inlet of the drainage pipe 08, avoiding stagnation and dead zones in the lower chamber 07, and improving drainage efficiency. Furthermore, the presence of the reinforcing ribs increases the contact area between the layered partition 05 and the liquid, facilitating a smooth flow of liquid along the partition surface and further optimizing the settling effect. This embodiment, while maintaining other structural elements unchanged from Embodiment 1, enhances the overall performance and stability of the liquid bag by adding the reinforcing rib structure.

[0026] The following is another specific embodiment 3 of this utility model. Embodiment 3 improves upon Embodiment 1 by modifying the structure of the drainage tube 08. Arc-shaped baffles are respectively installed above the six elliptical drainage holes 082 at the top of the drainage tube 081. Each arc-shaped baffle is semi-cylindrical and covers the corresponding drainage hole 082. The arc-shaped baffles are fixedly connected to the outer wall of the drainage tube 08. The arc length of the arc-shaped baffle is 8mm, the height is 5mm, and the gap between it and the outer wall of the drainage tube 08 is 1mm. The material of the arc-shaped baffles is the same as that of the drainage tube 08—silicone material—and they are fixed by adhesive bonding. The openings of the arc-shaped baffles face the side of the drainage tube 08, forming a lateral liquid inlet structure. Liquid enters the arc-shaped baffles from the side. The gap between the liquid and the drainage tube 08 is then filled, and the liquid enters the interior of the drainage tube 08 through the drainage hole 082. This structure effectively prevents sediment from settling directly into the drainage hole 082 from above. Even if a small amount of fine particles that have not completely settled enter the lower chamber 07, under the guidance of the lateral liquid inlet, the particles will flow with the liquid and will not directly block the drainage hole 082. The arc-shaped baffle also plays a role in stabilizing the flow, making the liquid flow velocity entering the drainage tube 08 more uniform, reducing the generation of turbulence and eddies, reducing the impact on the tube wall when the liquid enters the drainage tube 08, and extending the service life of the drainage tube 08. This embodiment further improves the anti-clogging performance and drainage reliability of the liquid bag by optimizing the inlet structure of the drainage tube 08.

[0027] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A layered rapid drainage fluid bag comprising a bag body and a drainage tube, characterized in that, The bag is made of a flexible film material and has a layered partition inside, which divides the internal space of the bag into an upper chamber and a lower chamber. The layered partition extends along the width of the bag, with one end fixedly connected to the side wall of the bag and the other end being a free end. The drainage tube passes through the bottom of the bag and extends into the lower chamber, with the top end of the drainage tube located in the lower chamber and higher than the bottom of the bag. A fluid passage gap is formed between the free end of the layered partition and the opposite side wall of the bag.

2. The layered rapid drainage bag according to claim 1, characterized in that, The layered partition has an arc-shaped plate structure, with the arc-shaped convex surface of the layered partition facing the upper chamber and the arc-shaped concave surface of the layered partition facing the lower chamber.

3. The layered rapid drainage bag according to claim 2, characterized in that, The width of the liquid-permeable slit gradually increases along the height of the bag body, and the width of the liquid-permeable slit near the bottom of the bag body is greater than the width near the fixed end of the layered partition.

4. The layered rapid drainage bag according to claim 3, characterized in that, The top end of the drainage tube has multiple drainage holes, which are evenly distributed along the circumference of the drainage tube, and each drainage hole is elliptical.

5. A layered rapid drainage bag according to claim 4, characterized in that, The free end edge of the layered partition has a serrated structure, with the tips of the serrated structure facing the opposite sidewall of the bag body, and a groove is formed between two adjacent tips.

6. A layered rapid drainage bag according to claim 5, characterized in that, The upper part of the bag is provided with a liquid inlet, which is located at the top center of the upper chamber, and the opening direction of the liquid inlet is perpendicular to the extension direction of the layered partition.

7. A layered rapid drainage bag according to claim 6, characterized in that, The portion of the drainage tube outside the bag has a spiral structure, with 3 to 5 spiral turns, and the spiral diameter gradually decreases along the drainage direction.

8. A layered rapid drainage bag according to claim 7, characterized in that, The thickness of the layered partition is less than the thickness of the bag body sidewall. The connection between the layered partition and the bag body sidewall is fixed by hot-melt bonding, and the connection line formed by the hot-melt bonding is straight.

9. A layered rapid drainage bag according to claim 8, characterized in that, The bag is made of polyvinyl chloride film material. When not filled with liquid, the bag is flat and the two opposing main surfaces of the bag are sealed together at the periphery by heat sealing.

10. A layered rapid drainage bag according to claim 9, characterized in that, The drainage tube is made of silicone material. A reinforcing ring is provided at the connection between the drainage tube and the bottom of the bag. The inner diameter of the reinforcing ring matches the outer diameter of the drainage tube. The reinforcing ring is embedded in the opening at the bottom of the bag and forms a sealed connection with the bottom of the bag.

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