An inflatable flexible pressure-resistant container

Abstract

This invention relates to the field of temporary road paving and emergency repair technology, and particularly to an expandable flexible pressure-resistant container, comprising: a flexible sealed bag; a reactant container disposed inside the flexible sealed bag; an expandable solidifying reactant contained within the reactant container; and a release device disposed on the reactant container. When the release device is triggered, the expandable solidifying reactant in the reactant container is released into the flexible sealed bag, rapidly expands, and solidifies to form a solid filler. This invention achieves extreme miniaturization and lightweighting of the unreacted state by pre-placing the reactant container inside the flexible sealed bag and using the reactant container as a core to roll up and store the bag. Multiple containers can be carried to the emergency site by a single person or in a small vehicle, completely eliminating the reliance on hoisting equipment associated with traditional steel plates or roadbed boxes, and significantly improving the mobility and deployment speed of emergency response.

Description

Technical Field

[0001] This invention relates to the field of temporary road paving and emergency repair technology, and in particular to an expandable flexible pressure-resistant container. Background Technology

[0002] On soft surfaces such as mud, swamps, beaches, subsidence areas, and snowfields, heavy construction machinery (such as 50-ton excavators, cranes, and transport vehicles) often sink, slip, or even overturn due to insufficient ground pressure, severely hindering the efficiency of rescue, construction, and military operations. To quickly restore traffic flow, existing technologies primarily employ the following solutions: Laying steel plates or roadbed boxes: They have high strength and good load-bearing capacity, but the weight of a single piece often reaches hundreds of kilograms to several tons. Transportation and laying require large hoisting equipment, which cannot be carried by a single person or small vehicle, making it difficult to deploy quickly in remote or disaster sites.

[0003] Pouring concrete or quick-drying cement: can be formed on site, but the curing time is long (several hours to several days), which cannot meet the needs of "minute-level" emergency repairs, and also requires a large amount of materials and mixing equipment.

[0004] Inflatable airbags or flexible pads: lightweight and portable, but with extremely low pressure resistance (usually less than 1 MPa), they will break or collapse immediately under heavy machinery and cannot provide effective support.

[0005] Polyurethane foam filling: It can be foamed and expanded on site, but the foaming process is extremely hot and the core temperature often exceeds 100°C, which will burn or soften ordinary flexible bags. In addition, the compressive strength of ordinary polyurethane foam is usually only 0.5~5MPa, which is far from meeting the 50-ton heavy load requirement.

[0006] A long-standing technical contradiction exists: high load-bearing capacity necessitates a dense and heavy structure, resulting in large volume and weight; while lightweight and portable structures often lack sufficient strength. In other words, "lightweight" and "high strength" are considered mutually exclusive characteristics in this field. How to achieve a structure that can be folded and carried when not in use, and self-expands within minutes after use into a rigid structure capable of withstanding the crushing force of heavy tracked machinery, has been a long-standing unsolved technical problem in this field. Therefore, an expandable flexible pressure vessel is needed to solve these problems. Summary of the Invention

[0007] The purpose of this invention is to solve the problems mentioned in the background section.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: An expansion-type flexible pressure-resistant vessel, comprising: A flexible, resealable bag; A reactant container disposed inside the flexible sealed bag; Expandable and curable reactants contained within the reactant container; A release device disposed on the reactant container; When the release device is triggered, the expandable solidified reactant in the reactant container is released into the flexible sealing bag, which rapidly expands and solidifies to form a solid filler, completely filling and expanding the flexible sealing bag into a full cylindrical object. The cylindrical object can be placed in the trench as a temporary bridge pier to withstand the crushing force of a 60-ton tracked engineering machine.

[0009] Preferably, the reactant container is a cylindrical or longitudinally extending container, the axis of which coincides with the central axis of the flexible sealing bag when it is rolled up, so as to facilitate the flexible sealing bag to be rolled up and stored with the reactant container as the center.

[0010] Preferably, the release device is one or more of a pull ring, a tear membrane, a solenoid valve, or a water-soluble sealing plug.

[0011] Preferably, the expandable curable reactant is a mixture of a two-component epoxy-hollow microsphere system and a sodium bicarbonate-citric acid foaming agent, and more preferably a polyurethane prepolymer and water reaction foaming system.

[0012] Preferably, the flexible sealing bag is made of high-strength thermoplastic polyurethane, mesh fabric, or polyester fiber reinforced coated fabric, and its initial state is flat or rolled up with the reactant container as the center.

[0013] Preferably, the cylindrical object, after curing, has a compressive strength ≥40MPa and a density of 250~350kg / m³. 3 .

[0014] Preferably, the reactant container further contains separately stored components A and B. When the release device is triggered, components A and B are first mixed and then released into the flexible sealed bag.

[0015] Preferably, the flexible sealing bag has flat or curved ends at both ends of the cylindrical object after expansion and curing, so as to stably support it on both sides of the trench.

[0016] Preferably, the flexible sealed bag is equipped with a remote control module or a manual pull rope for triggering the release device.

[0017] This invention has at least the following beneficial effects: 1. This invention achieves extreme miniaturization and lightweighting of the unreacted state by pre-placing the reactant container inside a flexible sealed bag and then rolling the bag around the reactant container as a core. Multiple containers can be carried to the disaster relief site by a single person or a small vehicle, completely eliminating the dependence on hoisting equipment for traditional steel plates or roadbed boxes, and greatly improving the mobility and deployment speed of emergency response.

[0018] 2. This invention uses a pull ring, solenoid valve, or water-soluble sealing plug as the release device. The operator only needs to pull the pull cord or press the remote control to trigger the release of the reactants within seconds. The bag body self-expands and solidifies within 2 to 10 minutes to achieve a compressive strength ≥40MPa and a density of 250 to 350kg / m³. 3 The cylindrical rigid body is a process that requires no on-site mixing or external power, and is hundreds of times faster than concrete curing, truly achieving instant use and bridge construction in minutes.

[0019] 3. This invention, through its built-in release and directional expansion design, allows the flexible bag to automatically conform to the trench wall within the trench, forming a cylindrical pier with flat or curved ends. This pier can stably support the impact of 60-ton tracked machinery without breaking or sinking. Simultaneously, the reaction generates very little heat (<50℃), without damaging the bag; the generated gas is CO2 or trace amounts of ammonia, making it safe and non-toxic. This solution combines four major advantages: portability, speed, high strength, and safety, filling a long-standing technological gap in the field of temporary bridge piers. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the external planar structure of an expandable flexible pressure-resistant container proposed in this invention; Figure 2 This is a schematic diagram of the external side view of an expandable flexible pressure-resistant container proposed in this invention; Figure 3 This is a summary and comparison table of the technical effects of the embodiments of the present invention.

[0022] In the diagram: 1. Flexible sealing bag; 2. Reactant container; 3. Release device. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0024] Reference Figure 1-3 An expansion-type flexible pressure-resistant container, comprising: A flexible, sealed bag 1; A reactant container disposed inside a flexible sealed bag 1; Expandable and solidifiable reactants contained within reactant container 2; Release device 3 is installed on reactant container 2. When release device 3 is triggered, reactant in reactant container 2 is released into flexible sealing bag 1, rapidly expands and solidifies to form solid filler, completely filling and expanding the flexible sealing bag 1 into a full cylindrical object. Cylindrical objects can be placed in trenches as temporary bridge piers to withstand the crushing force of 60-ton tracked engineering machinery.

[0025] The reactant container 2 is a cylindrical or longitudinally extending container, whose axis coincides with the central axis of the flexible sealing bag 1 when it is rolled up, so as to facilitate the flexible sealing bag 1 to be rolled up and stored with the reactant container 2 as the center.

[0026] The release device 3 is one or more of a pull ring, a tear diaphragm, a solenoid valve, or a water-soluble sealing plug.

[0027] The expandable curable reactant is a mixture of a two-component epoxy-hollow microsphere system and a sodium bicarbonate-citric acid foaming agent, preferably a polyurethane prepolymer and water reaction foaming system.

[0028] The flexible sealing bag 1 is made of high-strength thermoplastic polyurethane, mesh fabric or polyester fiber reinforced coated fabric, and its initial state is flat or rolled up with the reactant container 2 as the center.

[0029] According to GB / T8813-2020, the compressive strength of the cured cylindrical object is ≥40MPa, and the density is 250~350kg / m³. 3 .

[0030] The reactant container 2 also contains separately stored components A and B. When the release device 3 is triggered, components A and B are first mixed and then released into the flexible sealed bag 1.

[0031] The flexible sealing bag 1 has flat or curved ends at both ends of the cylindrical object after expansion and curing, so as to stably support it on both sides of the trench.

[0032] Reference Figure 3As shown in the comparison table, the following analysis and description are based on multiple embodiments; Example 1: Pull ring type manual trigger; Application scenario: There is a 1.2-meter-wide and 1.5-meter-deep ditch next to a rural road destroyed by a flood. Temporary bridge piers need to be erected to allow a 60-ton excavator to pass through. There is no power supply or hoisting equipment on site, and only one rescue worker is available.

[0033] The flexible sealing bag 1 is made of high-strength thermoplastic polyurethane (TPU) mesh fabric. It is initially cylindrical and flat when not inflated. One end is closed and the other end is connected to a cylindrical reactant container 2 by hot-melt welding.

[0034] The reactant container 2 is a rigid plastic cylinder with a wall thickness of 2mm, a length of 30cm, and a diameter of 10cm. It is pre-filled with a mixture of a two-component epoxy-hollow microsphere system and a sodium bicarbonate-citric acid gas-generating agent. To isolate components A and B, a fragile diaphragm is installed in the middle of the container.

[0035] The release device 3 is a pull-ring type sealing plug, which is screwed onto the end opening of the reactant container 2 by threads, and the pull ring extends to the outside of the flexible bag body by a flexible pull rope, which is equipped with a waterproof sealing ring when it passes through the bag body.

[0036] Connection and sealing: The bottom of the reactant container 2 is bonded and sewn to the bottom of the inner wall of the flexible bag 1 with structural adhesive to ensure that it will not be displaced when it expands. The opening of the bag and the outer wall of the container are sealed with high-frequency heat to form an airtight seal to prevent leakage when the reactants are not released.

[0037] Work process: Normally, the flexible bag 1 is tightly wound into a cylinder with a diameter of about 20cm using the reactant container 2 as the core axis and secured with straps. Rescuers carry it to the edge of the trench, untie the straps, and throw the entire wound bag into the predetermined position in the trench.

[0038] Trigger release: Personnel stand at a safe distance and pull the rope extending outside the bag. The rope pulls the ring to pull the sealing plug out of the reactant container 2. At this time, components A and B in the container break through the diaphragm and mix due to vibration and pressure changes. At the same time, sodium bicarbonate in contact with citric acid immediately begins to produce gas.

[0039] Expansion and curing: The mixed reactants flow out of the container opening and into the interior of the flexible bag 1. The gaseous reaction CO2 causes the bag to expand rapidly within 30 seconds, squeezing the trench sidewalls and bulging upwards. At the same time, the epoxy system initially solidifies within 2-3 minutes and is completely cured within 10 minutes. Because the bag is a pre-formed cylindrical design, it automatically forms a full cylinder with a diameter of about 1.2m and a length of 1.5m after expansion. The two ends are naturally formed into flat ends by the stitching lines of the bag, which stably support the slopes on both sides of the trench.

[0040] Load-bearing capacity: After 10 minutes, a 60-ton tracked excavator can directly run over the cylindrical pier without the pads breaking or sinking. It can be completed by a single person, with results seen in 10 minutes, and can be passed over more than 20 times.

[0041] Sealing structure: The pull cord has a double O-ring and is filled with silicone grease where it passes through the bag to prevent premature leakage of reactants.

[0042] Anti-backflow design: The opening of reactant container 2 faces the long axis of the bag, so that the expansion force is evenly distributed along the cylindrical axis and local bulging is avoided.

[0043] Temperature adaptability: The epoxy system can be cured within the range of -10℃ to 40℃. At low temperatures, 0.5% triethanolamine accelerator can be added to the formulation.

[0044] Example 2: Remote control solenoid valve triggering; Application scenario: In military operations, the enemy has dug a 2-meter-deep trench on the road. It is necessary to quickly fill a bridge pier without exposing personnel, and the expansion process must be silent and without ropes.

[0045] The flexible bag 1 is made of the same material as in Example 1, but the internal reactant container 2 is made of high-strength aluminum alloy cylinder, and its outlet is equipped with a miniature solenoid valve as a release device 3.

[0046] The solenoid valve is screwed onto the container outlet, and the valve body is sealed to the bag body by a flange. The power cord of the solenoid valve is connected to a rechargeable lithium battery pack, which is also pre-placed inside the bag near the container and controlled by an RF remote control receiver module.

[0047] The battery pack and receiver module are encapsulated in silicone rubber and then tied to the side of the reactant container 2 to prevent short circuits. The remote control antenna is led out of the bag through a waterproof radio frequency terminal on the bag body, which is thermally fused to the bag body.

[0048] Work process: Soldiers carry the rolled-up bag to a point about 20 meters from the trench and roll it into the trench without needing to get close.

[0049] A handheld remote control is used to send an open signal, which connects the solenoid valve to the power supply via the receiving module, and the valve opens.

[0050] The polyurethane prepolymer in reactant container 2 reacts with water to form a foaming system. It is stored separately and mixed when the valve is opened. It foams and solidifies rapidly upon contact with water, filling the bag and forming a cylinder within 10 minutes.

[0051] Tanks or engineering vehicles then ran over it.

[0052] Preventing accidental triggering: The remote control signal is encrypted with a rolling code, and the receiving module needs to receive the same signal twice in a row before it will activate.

[0053] Low temperature start-up: In an environment of -20℃, the solenoid valve coil is preheated by battery power for 5 seconds before opening to prevent the valve from freezing and sticking.

[0054] Gas filtration: The trace amount of ammonia gas generated during foaming is discharged through a one-way microporous vent valve on the bag body. This valve only vents gas and does not allow water to enter, ensuring safety.

[0055] Example 3: Water-soluble sealing plug type; Application scenario: After a flood, a 1.8m deep trench filled with turbid water was washed out of the road. Bridge piers need to be built quickly, but personnel cannot lower ropes or remotely control them.

[0056] Tests showed that it takes about 90 seconds to completely dissolve in water at 5°C, about 30 seconds in water at 25°C, and about 180 seconds in ice water at 0°C, all of which meet the triggering requirements.

[0057] The release device 3 was replaced with a water-soluble sealing plug made of polyvinyl alcohol (PVA), which was press-fitted into the opening of the reactant container 2.

[0058] Reactant container 2 is pre-filled with an epoxy-hollow microsphere-sodium bicarbonate / citric acid system that does not react prematurely with water but becomes water-resistant after curing. Several water inlet holes are located at the bottom of the container, normally sealed with tear-off tape.

[0059] Connection details: The water-soluble sealing plug has a waterproof wax coating on the outer ring to prevent slow dissolution in high humidity air; it only begins to dissolve after being fully immersed in water for 30 seconds.

[0060] Work process: The rolled-up bag was thrown directly into the ditch and sank to the bottom.

[0061] Water enters through the inlet at the bottom of the container, and the water pressure forces the tape open, dissolving the sealing plug.

[0062] Water serves as the medium or catalyst for the gas-generating reaction. When the material in the reactant container 2 comes into contact with water, it begins to generate gas and expand, while simultaneously solidifying. Within 5 minutes, the water is displaced and the bag is filled, forming a cylindrical pier that rises above the water surface, allowing the excavator to pass directly through.

[0063] Gravity adjustment: Sew lead weights to the bottom of the bag to ensure that the water inlet of the container faces downwards after it is thrown in.

[0064] Water resistance: The outer surface of the bag has a rough texture and anchor claws, which can be soft rubber hooks to prevent it from rolling in flowing water.

[0065] Underwater curing test: The data given in the example is that the compressive strength after underwater curing is 38MPa, which is slightly lower than that in the dry environment, but still meets the 60-ton load requirement.

[0066] Example 4: Application scenario: A 4m wide and 2m deep crack has formed in the collapse area. The span of a single cylindrical pier is not enough, so multiple supports are needed side by side.

[0067] Three flexible pressure-resistant containers are used, each designed to be 1.5m long and 1.2m in diameter after expansion. Their reactant containers 2 are interconnected by flexible connecting pipes, and the release device 3 is uniformly controlled by a central control pull ring.

[0068] The outlet of reactant container 2 in each container is connected to a common conduit via a one-way valve. The common conduit is then connected to the linkage switch of the master control pull ring. When the pull ring is pulled, the sealing plugs of all containers open simultaneously.

[0069] Work process: Place the three rolled-up bags side by side in the trench and tie them together with nylon straps.

[0070] Pull the main control ring, and the three containers release the reactants simultaneously, each expanding and solidifying into a cylinder, which then adheres tightly to each other to form a continuous support structure.

[0071] Steel plates are laid on top of them or tracked vehicles can travel directly on them, so that the pressure is evenly distributed.

[0072] Synchronization: The master control pull ring uses parallel steel cables with a stroke deviation of ≤2mm, ensuring that all sealing plugs open almost simultaneously.

[0073] Example 5; On a muddy construction site, a temporary load-bearing pad that can withstand repeated crushing by a 50-ton excavator needs to be laid quickly. This requires a single person to carry it and complete the deployment within 10 minutes. External mixing drums are not allowed to avoid material waste or contamination.

[0074] The flexible sealing bag 1 is made of mesh fabric, with an initial size of 2.0m long × 1.2m wide, and a designed thickness of 0.08m after expansion. A cylindrical reactant container 2 is fixed inside one end of the bag by hot-melt welding.

[0075] Reactant container 2 is a rigid plastic can with a volume of approximately 10L. It is pre-filled with an expandable and curable reactant, the specific formula of which is as follows (by mass): Agent A: 4 kg of bisphenol A type epoxy resin (E-51), 6 kg of hollow glass microspheres with a particle size of 20~60 μm and a wall thickness of 1~2 μm, and 0.1 kg of catalyst DMP-30, which is 2,4,6-tris(dimethylaminomethyl)phenol. Agent B: Modified amine curing agent type 593, 10 kg; Gas-generating agent: 1.2 kg of sodium bicarbonate (200 mesh) and 0.8 kg of citric acid (100 mesh).

[0076] To isolate components A and B, a fragile aluminum foil membrane is installed inside the container; the gas-generating agent is mixed and distributed in component A in powder form.

[0077] The release device 3 is a pull-ring type sealing plug, which is screwed onto the opening of the reactant container 2. The pull ring is connected to a flexible pull rope, and the pull rope is provided with a double O-ring seal and filled with silicone grease where it passes through the bag to prevent leakage before the reaction.

[0078] Work process: Carrying and laying: Normally, the flexible bag 1 is rolled into a cylinder with the reactant container 2 as the core axis, and carried to the site by a single soldier. After unfolding, the flexible bag 1 is laid flat on the muddy ground that needs to be reinforced.

[0079] Trigger release: The operator pulls the pull rope extending outside the bag, and the pull ring pulls the sealing plug out of the container opening. Components A and B are mixed due to the vibration breaking through the diaphragm. At the same time, the gas generating agent of sodium bicarbonate + citric acid combination begins to generate gas when it encounters trace amounts of moisture in the epoxy component or is activated by the catalyst.

[0080] Expansion and solidification: The mixed reactants flow from the container opening into the bag. After 20 seconds, they begin to expand significantly by producing gas. After 2 minutes, the volume reaches 4.2 times the initial volume of the mixed liquid, and the bag is fully taut. After 3 minutes, initial solidification occurs, and the bag surface hardens and becomes non-sticky. After 10 minutes, it is completely solidified.

[0081] Load-bearing test: The cured pad was placed on a muddy ground with a load-bearing capacity of 0.2 MPa, and a tracked excavator with a self-weight of 52 tons was guided through it. Its ground pressure was about 7 MPa. The excavator was repeatedly rolled over 10 times. The results showed that the surface of the pad had only slight track pattern indentations, no cracks, no breakage, and no sinking. The excavator passed through smoothly without slipping or getting stuck.

[0082] Sampling test data: Density: 295 kg / m³ 3 ; Compressive strength: 43.6 MPa; Expansion ratio: 4.2 times; Hollow microspheres account for approximately 60% of the volume, with a particle size range of 20-60 μm and a wall thickness of 1-2 μm, ensuring uniform dispersion in epoxy resin without becoming brittle.

[0083] The amount of catalyst DMP-30 is 2.5% of the total mass of agent A, which can achieve complete curing in 10 minutes with an exothermic peak below 50°C.

[0084] After the pull ring is pulled out, the container opening is equipped with a self-locking anti-backflow valve to prevent the solidifying foam from flowing back into the container.

[0085] Comparative example group; The following comparative examples all use the old process of external mixing followed by pouring in, in order to compare with the built-in triggering scheme of the present invention, highlighting the structural synergistic advantages of the present invention.

[0086] Comparative Example 1: Hollow glass microspheres were not added, Agent A was replaced with 10 kg of pure epoxy resin, and the rest of the reactant formulation was the same as in Example 5. The density after curing reached 680 kg / m³. 3 With a compressive strength of only 22.4 MPa and an expansion ratio of only 2 times, it could not fill the designed thickness of the bag. The pad cracked in multiple places after being run over by a 50-ton excavator once.

[0087] Comparative Example 2: Sodium bicarbonate and citric acid were omitted, while the remaining materials were the same as in Example 5. The mixture had a high viscosity and did not expand on its own after being poured into the bag, spreading only by gravity, resulting in a final thickness of only 1-2 cm. Furthermore, the density after curing reached a high of 620 kg / m³. 3 It cannot adhere tightly to the ground and breaks brittlely after being crushed.

[0088] Comparative Example 3; Commercially available two-component rigid polyurethane foam, namely white component + black component, is mixed in a 1:1 ratio and poured into the same flexible bag. The reaction is violent and exothermic. After 30 seconds, the bag wall temperature exceeds 90°C, the bag softens and deforms, and has a burnt smell. After curing, the foam surface is carbonized, and the compressive strength is only 2.8MPa. It can be crushed in one crushing.

[0089] Comparative Example 4; The same formulation from Example 5 was mixed externally and then poured into a flexible bag, i.e., the traditional external mixing and pouring method. Although the density and strength of the final cured body were similar to those of Example 5 (density 298 kg / m³), the results were still similar. 3 While it withstands a pressure of 42.8 MPa, it requires an additional mixing tank and mixer, and the mixture must be poured into a bag within 15 seconds after mixing. The operating window is extremely short, making it prone to material solidification or spillage due to operational errors. In contrast, the built-in triggering scheme of Embodiment 5 of this invention eliminates the need for on-site mixing; a simple pull is all that's needed, making it more suitable for single-person emergency operations.

[0090] Example 6; This embodiment is basically the same as embodiment five, except that the gas-generating agent in the reactant container 2 is replaced with 1.0 kg of sodium dihydrogen phosphate and 0.8 kg of ammonium bicarbonate. The other materials, epoxy, hollow microspheres and curing agent remain unchanged.

[0091] The working process is the same as in Example 5, but the gas production is more intense after triggering, reaching a maximum expansion volume of approximately 4.5 times within 35 seconds, initial condensation in 2 minutes, and complete solidification in 10 minutes. Samples taken after solidification showed a compressive strength of 40.2 MPa and a density of 305 kg / m³.3 .

[0092] After curing, a very slight ammonia odor is present when the bag is opened, which disappears after ventilating for 5 minutes and does not affect its use. This embodiment is suitable for emergency situations where a higher expansion rate is required.

[0093] As can be seen from the comparison of Examples 1-6 and Comparative Examples 1-4 above, the present invention, with its built-in reactant container 2 and release device 3, not only retains the advantages of the original chemical system in terms of high strength, lightweight, and low exothermic properties, but also achieves: no on-site mixing required, avoiding operational errors. It can be remotely or triggered in a single step, adapting to dangerous or confined environments. Its portability is greatly enhanced by being wound around a reactant container. Compared to Comparative Example 4, its ease of operation is significantly improved, while still achieving a compressive strength ≥40MPa and a density of 250~350kg / m³. 3 Performance metrics.

[0094] The specific material ratios, dimensional parameters, and triggering methods involved in all the above embodiments have been fully disclosed in the specification, and can be implemented by those skilled in the art without creative effort.

[0095] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. An expandable flexible pressure-resistant container, characterized in that, include: A flexible sealed bag (1); A reactant container (2) disposed inside the flexible sealed bag (1); Expandable and curable reactants contained within the reactant container (2); A release device (3) disposed on the reactant container (2); When the release device (3) is triggered, the expandable solidified reactant in the reactant container (2) is released into the flexible sealing bag (1), rapidly expands and solidifies to form a solid filler, completely filling and expanding the flexible sealing bag (1) into a full cylindrical object. The cylindrical object can be placed in the trench as a temporary bridge pier.

2. The expandable flexible pressure-resistant container according to claim 1, characterized in that, The reactant container (2) is a columnar or longitudinally extending container, whose axis coincides with the central axis of the flexible sealing bag (1) when it is rolled up, so as to facilitate the flexible sealing bag (1) to be rolled up and stored with the reactant container (2) as the center.

3. The expandable flexible pressure-resistant container according to claim 1, characterized in that, The release device (3) is one or more of a pull ring, a tear membrane, a solenoid valve, or a water-soluble sealing plug.

4. An expandable flexible pressure-resistant container according to claim 1, characterized in that, The expandable curable reactant is a mixture of a two-component epoxy-hollow microsphere system and a sodium bicarbonate-citric acid gas-generating agent.

5. An expandable flexible pressure-resistant container according to claim 1, characterized in that, The flexible sealing bag (1) is made of high-strength thermoplastic polyurethane, mesh fabric or polyester fiber reinforced coated fabric, and its initial state is flat or rolled up with the reactant container (2) as the center.

6. An expandable flexible pressure-resistant container according to claim 1, characterized in that, The cylindrical object, after curing, has a compressive strength ≥40MPa and a density of 250~350kg / m³. 3 .

7. An expandable flexible pressure-resistant container according to claim 1, characterized in that, The reactant container (2) also contains separately stored components A and B. When the release device (3) is triggered, components A and B are first mixed and then released into the flexible sealed bag (1).

8. An expandable flexible pressure-resistant container according to claim 1, characterized in that, The flexible sealing bag (1) has flat or arc-shaped ends at both ends of the cylindrical object after expansion and curing, so as to stably support it on both sides of the trench.

9. An expandable flexible pressure-resistant container according to any one of claims 1 to 8, characterized in that, The flexible sealed bag (1) is equipped with a remote control module or a manual pull rope for triggering the release device (3).

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