A retractable flexible cabin device to suppress cargo swaying

Abstract

This invention proposes a retractable flexible cargo hold device to suppress cargo swaying, comprising a frame, bulkheads, floats, and anti-collision components. Both the frame and bulkheads are made of flexible membrane or flexible fabric, and a sealed chamber is formed inside the frame. In the retracted state, the liquid inside the sealed chamber is drained; in the operational state, the sealed chamber is filled with filling fluid, allowing the frame to unfold upright. The bulkheads are connected to the frame and are tensioned to the frame in the operational state, parallel to the vertical plane. Multiple floats are respectively disposed on the frame and bulkheads, all at the same height, with the floats lower than the top of the bulkheads. Multiple anti-collision components are evenly distributed around the perimeter of the frame and the outside of the connecting pipes. This device occupies very little cargo space, features a fully flexible design, protects the ship's cargo hold structure from collisions with the device, requires no modification to the ship's cargo hold, and is adaptable to various cargo hold shapes and different types of liquid cargo at normal temperatures. Furthermore, when not in use, it can be folded for storage and is recyclable, saving costs.

Description

Technical Field

[0001] This invention relates to the field of ship liquid tank sloshing reduction technology, and in particular to a retractable flexible tank device for suppressing cargo sloshing. Background Technology

[0002] Liquid sloshing refers to the fluctuation of the liquid surface in a partially contained container due to external disturbances. In the marine industry, this phenomenon is common in large liquid cargo ships. During navigation, these ships are subjected to various external forces such as waves, wind loads, and maneuvering, which trigger a coupled response between the liquid inside the tank and the hull structure. This results in typical sloshing phenomena such as standing waves, traveling waves, hydrojumps, splashes, and liquid slamming against the tank walls. When the external excitation frequency approaches the natural frequency of the liquid sloshing, resonance may occur, leading to a sharp increase in the amplitude of the liquid sloshing. This generates significant impact loads on the tank structure, potentially causing fatigue damage, deformation, or even destruction. It can also cause liquid spills or leaks, resulting in serious safety risks and economic losses. Liquid tank sloshing is particularly pronounced in severe sea conditions, even severely reducing ship stability and endangering ship safety.

[0003] To mitigate the effects of sloshing in ship tanks, commonly used techniques include: placing floating objects on the liquid surface, altering the shape of the bulkhead structure, and installing horizontal or vertical baffles inside the tank. These structures can disrupt the liquid flow path to some extent, thereby reducing the intensity of sloshing. However, each of these methods has its limitations: floating objects move freely with the liquid surface fluctuations and are prone to frequent collisions with the tank structure during severe sloshing, which not only fails to effectively dissipate energy but may also cause structural damage, especially under conditions of liquid splashing or irregular waveforms, where the risk of collision is even higher; while bulkhead protrusions can disrupt the liquid flow path, they significantly compress the effective volume inside the tank, reducing the tank's storage capacity and increasing the local load on the bulkhead, posing risks such as uneven structural stress and welding fatigue; horizontal baffles are only effective under specific liquid level conditions, and their sloshing reduction performance rapidly decreases when the liquid level changes significantly; vertical baffles need to extend close to the liquid surface to effectively weaken the liquid flow inertia, but such structures are usually large and occupy a significant amount of tank space.

[0004] In summary, existing liquid tank sloshing reduction technologies still struggle to achieve an effective balance between maintaining tank volume utilization, structural safety, and good hydrodynamic performance. Summary of the Invention

[0005] In view of this, the present invention proposes a retractable flexible cabin device for suppressing cargo swaying, in order to solve the technical problem mentioned in the background art that the existing liquid tank sway reduction technology still struggles to achieve an effective balance between maintaining cabin volume utilization, structural safety and good hydrodynamic performance.

[0006] The technical solution of this invention is implemented as follows:

[0007] This invention provides a retractable flexible cargo hold device for suppressing cargo swaying, comprising a frame, bulkheads, floats, and anti-collision components, wherein:

[0008] The frame is made of flexible membrane or flexible fabric material and has a sealed chamber inside; in the storage state, the liquid in the sealed chamber is drained and the frame can be folded; in the use state, the sealed chamber is filled with filling liquid so that the frame can be unfolded upright, and there is a gap between the outer wall of the frame and the inner wall of the cabin.

[0009] The bulkhead is connected to the frame, tensioned on the frame in use, and parallel to the vertical plane. The bulkhead is made of flexible membrane or flexible fabric material.

[0010] The float is provided in multiple parts, which are respectively set on the frame and the bulkhead. The multiple floats are located at the same height, and the floats are lower than the top of the bulkhead.

[0011] Multiple anti-collision components are evenly distributed around the periphery of the frame and the outside of the connecting pipe, filling the gaps.

[0012] Based on the above technical solutions, preferably, the frame includes a top-level pipe, a bottom-level pipe, multiple support pipes, and multiple connecting pipes; the top-level pipe and the bottom-level pipe are arranged along a horizontal plane and are parallel to each other; the bottom-level pipe is provided with an inlet hole for inputting or discharging filling liquid; the support pipe is connected to and communicates with the bottom-level pipe; the connecting pipe connects and communicates with the bottom-level pipe and the top-level pipe, and extends a certain distance beyond the top-level pipe; the top of the connecting pipe is provided with a connecting hole.

[0013] Based on the above technical solutions, preferably, an exhaust valve is also included. The exhaust valve is installed in the connection hole and is used to open during the filling liquid input process to discharge air, and to automatically close when the filling liquid fills the sealed chamber.

[0014] Based on the above technical solutions, preferably, the vent valve includes a valve body, a sealing ring, a sealing membrane, and a float. The valve body has a liquid inlet at one end near the connecting pipe and a vent hole at the other end away from the connecting pipe. The sealing ring is installed on the valve body and located at the vent hole. The sealing membrane is connected to the inner wall of the sealing ring and the inner wall of the valve body. The float is located inside the valve body and is used to move upward under the action of buoyancy to fit against the sealing membrane to close the vent hole.

[0015] Based on the above technical solutions, preferably, a liquid valve is also included. The liquid valve is installed in the liquid inlet and connected to an external infusion device. It is used to open when filling liquid is input and close after the sealed chamber is filled with filling liquid.

[0016] Based on the above technical solutions, preferably, the bulkhead is provided in multiple ways, the multiple bulkheads are arranged in parallel, and the frame is divided into multiple spaces.

[0017] Based on the above technical solutions, preferably, it also includes multiple Velcro straps, which are connected to the periphery of the frame and the outside of the connecting tube by heat welding, and the anti-collision component is bundled with the Velcro straps.

[0018] Based on the above technical solutions, preferably, the float is made of foam material.

[0019] Based on the above technical solutions, preferably, the anti-collision component is made of rubber material.

[0020] Based on the above technical solutions, preferably, the filling liquid is the same as that used for the goods.

[0021] The retractable flexible cargo hold device of the present invention, which suppresses cargo swaying, has the following advantages over the prior art:

[0022] (1) The frame is upright and unfolded by filling the sealed chamber with filling liquid. The bulkhead is tensioned on the frame in use. The buoyancy of the float ensures that the bulkhead is still exposed above the water surface when the liquid sloshes. It rises and falls with the liquid surface and is always near the liquid surface. Therefore, no matter how high the liquid level is, it can always effectively suppress the liquid surface fluctuation. The bulkhead is thin and the required buoyancy is small, so the device occupies very little space in the compartment. The fully flexible design ensures that the ship's compartment structure is protected from collision with the device. The design is independent of the ship's compartment and does not require modification of the ship's compartment. It is suitable for various compartment shapes and different types of normal temperature liquid cargo. When not in use, it can be folded and stored, and can be recycled and reused, saving costs.

[0023] (2) The top-level pipe and the bottom-level pipe are arranged horizontally and parallel to each other; the bottom-level pipe is provided with an inlet hole for inputting or discharging filling liquid; the support pipe is connected to and communicates with the bottom-level pipe; the connecting pipe connects and communicates with the bottom-level pipe and the top-level pipe, and extends a distance beyond the top-level pipe; the top of the connecting pipe is provided with a connecting hole; the filling liquid is filled into the sealed chamber through the inlet hole; during the filling process, the gas in the sealed chamber is discharged through the connecting hole; after the filling liquid fills the sealed chamber, the frame is erected and unfolded to form a support for the bulkhead;

[0024] (3) The exhaust valve is used to open during the filling liquid input process to release air, and automatically closes when the filling liquid fills the sealed chamber, so that the filling liquid in the sealed chamber will not leak, forming a structurally stable flexible tank device, thereby playing the role of suppressing liquid cargo sloshing.

[0025] (4) A liquid inlet is provided at one end of the valve body near the connecting pipe, and an exhaust hole is provided at the other end of the valve body away from the connecting pipe. The sealing ring is installed on the valve body and located at the exhaust hole. The sealing membrane is connected to the inner wall of the sealing ring and the inner wall of the valve body. The float is located in the valve body. In the initial stage of filling with filling liquid, the air in the sealed chamber is discharged through the liquid inlet and the exhaust hole. After the filling liquid rises to the liquid inlet and enters the valve body, the buoyancy drives the float to move upward to fit with the sealing membrane and close the exhaust hole. At this time, the sealed chamber is filled with filling liquid, which can realize the automatic closure of the exhaust hole and prevent the filling liquid in the sealed chamber from leaking.

[0026] (5) The liquid valve is installed in the inlet hole and connected to the external liquid delivery equipment. It is used to open when the filling liquid is input and close after the sealed chamber is filled with filling liquid to achieve the sealing of the sealed chamber, ensure that the filling liquid will not leak, so that the frame can have better structural strength and improve the reliability and stability of the device. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a perspective view of the retractable flexible cabin device for suppressing cargo swaying in an embodiment of the present invention.

[0029] Figure 2 This is a perspective view of the retractable flexible cabin device for suppressing cargo swaying in an embodiment of the present invention from another angle.

[0030] Figure 3 This is a schematic diagram of the frame structure in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the exhaust valve in the open state in an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of the exhaust valve in the closed state in an embodiment of the present invention;

[0033] Figure 6 This is a top view of the retractable flexible cabin device for suppressing cargo swaying, as described in this embodiment of the invention, placed in the ship's hull.

[0034] Explanation of reference numerals in the attached drawings: 1-frame, 2-bulwark, 3-buoyancy body, 4-collision guard, 5-vent valve, 6-liquid valve;

[0035] 11-Top layer pipe, 12-Bottom layer pipe, 121-Liquid inlet, 13-Support pipe, 14-Connecting pipe, 141-Connecting hole;

[0036] 51-Valve body, 511-Liquid inlet, 512-Vent hole, 52-Sealing ring, 53-Sealing membrane, 54-Float. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] Reference Figures 1-6 As shown, this embodiment of the invention proposes a retractable flexible cabin device for suppressing cargo swaying, comprising a frame 1, a bulkhead 2, a float 3, and a collision protection component 4, wherein:

[0039] The frame 1 is made of flexible membrane or flexible fabric material and has a sealed chamber inside. In the storage state, the liquid in the sealed chamber is drained, and the frame 1 can be folded. In the use state, the sealed chamber is filled with filling liquid, which makes the frame 1 stand upright and unfold. There is a gap between the outer wall of the frame 1 and the inner wall of the cabin. A small gap is left between its outer frame and the cabin wall 2. On the one hand, it can restrain the swing of the flexible cabin. On the other hand, it can facilitate the flexible cabin to rise with the liquid level.

[0040] The bulkhead 2 is connected to the frame 1 and is tensioned on the frame 1 in use, parallel to the vertical plane. The bulkhead 2 is made of flexible membrane or flexible fabric. The flexible membrane can be HDPE (High Density Polyethylene) membrane, and the flexible fabric can be PVC (Polyvinyl Chloride) coated fabric. Part of the bulkhead 2 is immersed to a sufficient depth below the liquid surface to separate the compartments and reduce swaying, while part of it is exposed above the liquid surface to meet the liquid surface rise height requirement.

[0041] Multiple floats 3 are provided, and multiple floats 3 are respectively set on the frame 1 and the bulkhead 2. The multiple floats 3 are located at the same height, and the floats 3 are lower than the top of the bulkhead 2. The floats 3 can be cylindrical and can be set on the inner side of the perimeter of the frame 1 and on both sides of the bulkhead 2 to provide sufficient buoyancy.

[0042] Multiple anti-collision components 4 are evenly distributed around the periphery of the frame 1 and the outer side of the connecting pipe 14, filling the gaps. The anti-collision components 4 can reduce the collision between the frame 1 and the ship's bulkhead and hull, and reduce the frictional resistance between the device and the ship's bulkhead during lifting, lowering, and retraction.

[0043] The retractable flexible cargo hold device proposed in this embodiment, which suppresses cargo sloshing, allows the frame 1 to stand upright and unfold by filling the sealed cavity with filling liquid. The hold wall 2 is tensioned onto the frame 1 during use. The float 3 provides ample buoyancy to ensure that the hold wall 2 remains above the water surface even when the liquid sloshes, rising and falling with the liquid level and always remaining near the surface. Therefore, regardless of the liquid level in the tank, it can effectively suppress liquid surface fluctuations. The thin hold wall 2 requires less buoyancy, resulting in minimal space occupation. Its fully flexible design protects the ship's cabin structure from collisions. Independent of the ship's cabin design, it requires no modification to the ship's cabin and adapts to various cabin shapes and different types of liquid cargo at normal temperatures. Furthermore, when not in use, it can be folded for storage and is recyclable, saving costs.

[0044] In some embodiments, the frame 1 includes a top-level pipe 11, a bottom-level pipe 12, multiple support pipes 13, and multiple connecting pipes 14. The top-level pipe 11 and the bottom-level pipe 12 are arranged horizontally and parallel to each other. The bottom-level pipe 12 is provided with an inlet hole 121 for inputting or discharging filling fluid. The support pipes 13 are connected to and communicate with the bottom-level pipe 12. The connecting pipes 14 connect and communicate with the bottom-level pipe 12 and the top-level pipe 11, and extend beyond the top-level pipe 11 by a certain distance. The top of the connecting pipe 14 is provided with a connecting hole 141. The float 3 can be fastened to the outside of the top-level pipe 11, the bottom-level pipe 12, and the connecting pipes 14 using Velcro. Filling fluid is injected into the sealed chamber through the inlet hole 121. During the filling process, the gas in the sealed chamber is discharged through the connecting hole 141. After the filling fluid fills the sealed chamber, the frame 1 unfolds upright to support the bulkhead 2. The top frame 1 at the liquid surface is used to increase the strength of the bulkhead 2 at the liquid surface and protect the shape of the compartment when subjected to liquid sloshing impact. Its pipes are directly connected to each other to facilitate the filling and draining of liquid. In this embodiment, the top pipe 11 and the bottom pipe 12 are rectangular. Of course, in other embodiments, their shape can also be a closed curve shape, as long as it is adapted to the shape of the ship's compartment.

[0045] In some embodiments, the flexible compartment device further includes an vent valve 5, which is installed in the connection hole 141. The vent valve 5 is used to open during the filling fluid input process to release air and to automatically close when the filling fluid fills the sealed chamber. By automatically closing the vent valve 5 when the filling fluid fills the sealed chamber, the filling fluid in the sealed chamber will not leak, forming a structurally stable flexible compartment device, thereby suppressing liquid cargo sloshing.

[0046] In some embodiments, the vent valve 5 includes a valve body 51, a sealing ring 52, a sealing membrane 53, and a float 54. The valve body 51 has a liquid inlet 511 at one end near the connecting pipe 14 and a vent hole 512 at the other end away from the connecting pipe 14. The sealing ring 52 is mounted on the valve body 51 and located at the vent hole 512. The sealing membrane 53 is connected to the inner wall of the sealing ring 52 and the inner wall of the valve body 51. The float 54 is located inside the valve body 51 and is used to move upward under buoyancy to fit against the sealing membrane 53, thereby sealing the vent hole 512. The vent valve 5 is a cylinder made of rubber material and is high-pressure heat-welded to the top of the connecting pipe 14 of the frame 1. Initially, during the filling of the sealing chamber, air in the sealed chamber is discharged through the liquid inlet 511 and the vent 512. Once the filling liquid rises to the liquid inlet 511 and enters the valve body 51, buoyancy causes the float 54 to move upwards until it adheres to the sealing membrane 53, sealing the vent 512. At this point, the sealed chamber is filled with filling liquid, enabling automatic sealing of the vent 512 and preventing leakage of the filling liquid within the sealed chamber. When the filling liquid in the sealed chamber is discharged, the float 54 falls, opening the vent 512 to allow air in, ensuring the filling liquid is completely and smoothly discharged from the sealed chamber, facilitating storage and portability. The sealing ring 52 and the sealing membrane 53 can be made of rubber.

[0047] In some embodiments, the flexible chamber device further includes a liquid valve 6, which is installed at the liquid inlet 121 and connected to an external liquid delivery device. The liquid valve 6 is used to open when filling liquid is introduced and close after the sealed chamber is filled with filling liquid. By opening the liquid valve 6 when filling liquid is introduced and closing it after the sealed chamber is filled with filling liquid, the sealed chamber is sealed, ensuring that the filling liquid does not leak. This allows the frame 1 to have better structural strength and improves the reliability and stability of the device.

[0048] In some embodiments, multiple bulkheads 2 are provided, arranged in parallel, and divide the frame 1 into multiple spaces. Increasing the number of bulkheads 2 can improve the effect of suppressing liquid cargo sloshing. The number of layers of bulkheads 2 is determined according to the size of the compartment.

[0049] In some embodiments, the flexible cabin device further includes multiple Velcro straps, which are thermally welded to the periphery of the frame 1 and the outer side of the connecting pipe 14. The anti-collision member 4 is attached to the Velcro straps. The Velcro straps are all thermally welded to the pipe surface under high temperature and pressure. The anti-collision member 4 is attached to the periphery of the frame 1 and the outer side of the connecting pipe 14 via Velcro straps, reducing the collision between the frame 1 and the connecting pipe 14 and the ship's bulkhead.

[0050] In some embodiments, the frame 1 and the bulkhead 2 are made of PVC-coated fabric. PVC-coated fabric has excellent mechanical properties and low cost; therefore, the frame 1 and the bulkhead 2 are preferably made of PVC-coated fabric. Of course, other elastic membrane materials with high mechanical properties that are suitable for the acid and alkaline environment of liquid cargo can also be used.

[0051] In some embodiments, the float 3 is made of foam material to provide better buoyancy, and the anti-collision component 4 is made of rubber material to provide better cushioning.

[0052] In some embodiments, the filling fluid is the same as the cargo. Since the filling fluid is the same liquid as the cargo, the required buoyancy is also smaller, and the number and volume of the floats 3 are smaller, resulting in the device occupying very little compartment space. This achieves an effective balance between maintaining compartment volume utilization, structural safety, and good hydrodynamic performance.

[0053] The working principle of the retractable flexible cabin device for suppressing cargo swaying in this embodiment of the invention is as follows:

[0054] First, the flexible cabin device of the invention is installed at the bottom of the ship's hold and unfolds vertically against the ship's bulkhead. Then, the liquid cargo filling pipeline on the ship is connected to the liquid valve 6 of the device, and liquid is started to be added to the sealed chamber of the frame 1. As the liquid in the frame 1 increases, the frame 1 gradually unfolds vertically. As the liquid cargo is continuously added, air gathers at the top of the frame 1 and is discharged from multiple exhaust valves 5. When the liquid fills the entire frame 1, the float ball 54 in the exhaust valve 5 tightly blocks the exhaust port of the exhaust valve 5, and the exhaust valve 5 automatically closes. The liquid is locked inside the frame 1, and the frame 1 has a certain rigidity because it is filled with pressurized liquid. The addition of liquid cargo to the frame 1 is stopped. At this time, the flexible bulkhead 2 is also fully supported and unfolded, and the flexible cabin device of the invention is formed by filling with liquid and standing upright at the bottom of the ship's hold. The flexible cabin device is in contact with the bulkhead 2 and the bottom of the hold through flexible anti-collision parts 4.

[0055] Next, liquid cargo is added to the ship's liquid tank. When the liquid level submerges the float 3, the flexible tank device begins to rise with the liquid level under the action of buoyancy. Since the flexible tank device of this invention is always located on the liquid level, it can effectively suppress liquid cargo sloshing no matter how high the liquid level is. If the liquid cargo is full, the top of the flexible tank device of this invention is tightly attached to the top surface of the ship's tank through the flexible anti-collision member 4. Alternatively, if the liquid cargo is transported in a full tank, the flexible tank device of this invention may not be placed. If the liquid cargo is not full, or if the liquid cargo is transferred or consumed midway, the flexible tank device of this invention plays the role of suppressing sloshing and ensuring the safety of the ship.

[0056] When unloading liquid cargo, first discharge the liquid cargo in the hold. After the cargo is discharged, open the liquid valve 6 to discharge the liquid cargo in the frame 1. At this time, the float 54 in the exhaust valve 5 falls, opens the air outlet and allows air to enter, ensuring that the liquid cargo is completely discharged from the frame 1.

[0057] When storing, inject cleaning water through the liquid valve 6, fully expand the frame 1 and the flexible cabin wall 2 again, first rinse the outer wall of the flexible cabin device of the present invention clean, then open the liquid valve 6, drain the cleaning water, and then fold and store the flexible cabin device of the present invention.

[0058] If the ship's cabin is repurposed, the flexible cabin device of this invention can be moved out of the cabin without affecting the cabin.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A retractable flexible cargo hold device for suppressing cargo swaying, characterized in that, Includes the frame, bulkheads, floats, and collision protection components, among which: The frame is made of flexible membrane or flexible fabric material and has a sealed chamber inside. In the stored state, the liquid in the sealed chamber is drained, and the frame can be folded. In the use state, the sealed chamber is filled with filling liquid, allowing the frame to stand upright and unfold. There is a gap between the outer wall of the frame and the inner wall of the cabin. The frame includes a top-level pipe, a bottom-level pipe, multiple support pipes, and multiple connecting pipes. The top-level pipe and the bottom-level pipe are arranged along a horizontal plane and are parallel to each other. The bottom-level pipe has an inlet hole for inputting or discharging filling liquid. The support pipes are connected to and communicate with the bottom-level pipes. The connecting pipes connect and communicate with the bottom-level pipes and the top-level pipes, and extend beyond the top-level pipes by a certain distance. The top of the connecting pipes has a connecting hole. The bulkhead is connected to the frame, tensioned on the frame in use, and parallel to the vertical plane. The bulkhead is made of flexible membrane or flexible fabric material. The float is provided in multiple parts, which are respectively set on the frame and the bulkhead. The multiple floats are located at the same height, and the floats are lower than the top of the bulkhead. Multiple anti-collision components are evenly distributed around the periphery of the frame and the outside of the connecting pipe, filling the gaps.

2. The retractable flexible cargo hold device for suppressing cargo swaying as described in claim 1, characterized in that, It also includes an air vent valve, which is installed in the connection hole and is used to open during the filling liquid input to vent air and to automatically close when the filling liquid fills the sealed chamber.

3. The retractable flexible cargo hold device for suppressing cargo swaying as described in claim 2, characterized in that, The vent valve includes a valve body, a sealing ring, a sealing diaphragm, and a float. The valve body has a liquid inlet at one end near the connecting pipe and a vent at the other end away from the connecting pipe. The sealing ring is installed on the valve body and located at the vent. The sealing diaphragm is connected to the inner wall of the sealing ring and the inner wall of the valve body. The float is located inside the valve body and is used to move upward under buoyancy to fit against the sealing diaphragm to seal the vent.

4. The retractable flexible cargo hold device for suppressing cargo swaying as described in claim 3, characterized in that, It also includes a liquid valve, which is installed in the liquid inlet and connected to an external infusion device, and is used to open when filling liquid is introduced and close after the sealed chamber is filled with filling liquid.

5. The retractable flexible cargo hold device for suppressing cargo swaying as described in claim 1, characterized in that, The frame is provided with multiple bulkheads, which are arranged in parallel and divide the frame into multiple spaces.

6. The retractable flexible cargo hold device for suppressing cargo swaying as described in claim 1, characterized in that, It also includes multiple Velcro straps, which are heat-welded to the periphery of the frame and the outside of the connecting tube, and the anti-collision component is tied to the Velcro straps.

7. The retractable flexible cargo hold device for suppressing cargo swaying as described in claim 1, characterized in that, The float is made of foam material.

8. The retractable flexible cargo hold device for suppressing cargo swaying as described in claim 1, characterized in that, The anti-collision component is made of rubber.

9. The retractable flexible cargo hold device for suppressing cargo swaying as described in any one of claims 1-8, characterized in that, The filling fluid is the same as that used for the cargo.

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