Recoverable air bag for reinforcing steel bar support

Abstract

The embodiment of the invention provides a recoverable air bag for reinforcing steel bar supporting, which comprises an air bag assembly and an air inflation interface, and the air bag body forms a rigid supporting structure through air inflation and is matched with a middle gap area of a reinforcing steel bar component; the exhaust balance assembly comprises an air valve, a pressure sensor, a flow regulating valve and an air guide pipeline, the air valve is arranged on the side wall of the air bag body, the pressure sensor is installed on the outer side wall of the air bag body and used for monitoring external pressure changes in the concrete pouring process, and the flow regulating valve is connected with the air guide pipeline; the exhaust flow is dynamically adjusted according to signals of the pressure sensor; the control assembly is used for dynamically controlling exhaust operation according to the pressure signal and sending out a warning signal under the abnormal working condition. According to the technical scheme, the air bag can be recycled and reused, construction waste and resource waste are reduced, and the supporting stability, the pouring quality, the construction safety and the environmental protection property are improved.

Description

A recyclable airbag for steel reinforcement Technical Field

[0001] This invention belongs to the field of building construction technology, and in particular relates to a recyclable airbag for steel reinforcement support. Background Technology

[0002] Reinforced concrete structures are the core structural form in building engineering, and their construction quality directly determines the safety performance and service life of the building. In the construction of components such as long-span beams and thick slabs, in order to meet the structural stress requirements, the reinforcement is usually arranged in multiple layers and rows, with a certain gap reserved in between for concrete pouring and later functional needs (such as pipeline layout, weight reduction design, etc.). However, the existence of the gaps in the middle leads to a lack of effective support for the upper reinforcement, becoming a technical pain point in construction.

[0003] Stable support for the reinforcing bars is crucial for ensuring accurate bar placement and high-quality concrete pouring. Insufficient support can cause the bars to sink or shift under their own weight or construction loads, leading to excessive concrete cover thickness, misalignment of stressed bars, and reduced structural bearing capacity. Improper support methods can hinder concrete flow, resulting in defects such as honeycombing, pitting, and voids within the structure, thus decreasing its durability. Furthermore, the environmental friendliness and cost-effectiveness of support materials are important considerations in modern construction. Currently, the bar support methods used in the industry still face significant technical bottlenecks and cannot meet the demands of high-quality construction. Summary of the Invention

[0004] The embodiments of this application provide a recyclable airbag for steel reinforcement support, which enables the airbag to be recycled and reused, reducing construction waste and resource waste, and improving support stability, pouring quality, construction safety and environmental protection.

[0005] In a first aspect, embodiments of this application provide a recyclable airbag for reinforcing bar support, comprising:

[0006] Airbag assembly, exhaust balance assembly, and control assembly;

[0007] The airbag assembly includes an airbag body, which forms a rigid support structure by inflation, and is adapted to the middle gap area of ​​the steel reinforcement component.

[0008] The exhaust balance assembly includes an air valve, a pressure sensor, a flow regulating valve, and an air guide pipe. The air valve inflates or deflates the airbag body. The pressure sensor is installed on the outer wall of the airbag body to monitor changes in external pressure during concrete pouring. The air guide pipe is located on the outside of the airbag body, with one end connected to the air valve and the other end connected to the flow regulating valve. The flow regulating valve is used to dynamically adjust the exhaust and inflation flow based on the signal from the pressure sensor.

[0009] The control components include a main control unit and an alarm unit. The main control unit is electrically connected to the pressure sensor, air valve, and flow regulating valve, and is used to dynamically control the exhaust operation based on the pressure signal. The alarm unit is used to issue warning signals under abnormal operating conditions.

[0010] In one alternative embodiment, the airbag body is formed by combining a composite rubber layer and a polyester fiber fabric layer.

[0011] In one alternative embodiment, the composite rubber layer is a blend of nitrile rubber and polyurethane, and the polyester fiber fabric layer is made using a plain weave process and embedded inside the composite rubber layer.

[0012] In one alternative implementation, the airbag body is shaped like a cuboid or a cylinder.

[0013] In one alternative embodiment, the air valve is located on the top of the side wall of the airbag body.

[0014] In one alternative implementation, the valve core is made of silicone, and the valve has a one-way throttling structure to ensure that the airbag assembly remains sealed during the inflation support stage and automatically opens when the concrete pouring pressure reaches the opening pressure threshold.

[0015] In one alternative embodiment, a filter device is provided at the inlet of the air valve. The filter device is made of stainless steel mesh and is used to prevent concrete slurry or impurities from entering the exhaust pipe.

[0016] In one alternative implementation, the pressure sensor is a diffused silicon pressure sensor, the flow regulating valve is an electromagnetic proportional regulating valve, and the air guide pipe is a PVC reinforced flexible hose.

[0017] In one alternative implementation, the main control unit is configured to calculate the optimal exhaust flow rate based on real-time data from the pressure sensor and control the opening of the flow regulating valve.

[0018] In one alternative implementation, the main control unit is equipped with a multi-channel input / output interface, which can simultaneously connect to multiple pressure sensors, air valves, and flow control valves to control multiple airbag components synchronously.

[0019] The technical solution provided in this application has the following beneficial effects:

[0020] The airbag assembly in this invention is made of high-strength composite elastic material, forming a rigid support structure. The rubber layer and fiber fabric layer are combined, allowing the airbag to expand rapidly after inflation and possess high resistance to deformation. It can withstand the load of the upper steel reinforcement and can also shrink efficiently after deflating, significantly improving the stability of the support and preventing the steel reinforcement from sinking or shifting during construction. At the same time, it is adaptable to steel reinforcement components with different cross-sectional dimensions, enhancing construction flexibility. The exhaust balance assembly achieves dynamic balance between concrete pouring and exhaust by integrating an air valve, pressure sensor, and flow regulating valve. The pressure sensor monitors changes in external pouring pressure in real time, and the main control unit dynamically calculates the optimal exhaust flow rate based on the signal. The system controls the opening of the flow regulating valve to ensure that the external pressure of the airbag and the internal exhaust are coordinated during the pouring process. This prevents sudden pressure increases that could cause the airbag to rupture or obstruct concrete filling, ensuring dense concrete filling, reducing defects such as honeycomb and voids, and improving the overall quality of the component. The main control unit uses a programmable logic controller with a built-in pressure-flow adaptation algorithm, which can quickly respond to pressure fluctuations. The alarm unit issues timely warnings when abnormal operating conditions are detected (such as pressure exceeding limits or equipment failure). Through real-time data acquisition and multi-channel control, it can realize synchronous management of multiple airbags and fault early warning, improving construction efficiency, reducing human operation risks, and ensuring a safe and controllable construction process. Attached Figure Description

[0021] Figure 1 is a plan view of the overall layout of a recyclable airbag for steel reinforcement provided in an embodiment of this application;

[0022] Figure 2 is a cross-sectional view of a recyclable airbag for steel reinforcement provided in an embodiment of this application.

[0023] In the picture:

[0024] 1-Airbag body; 2-Reinforcing steel; 3-Intermediate void area; 4-Composite rubber layer; 5-Polyester fiber fabric layer; 6-Air valve; 7-Flow regulating valve; 8-Air guide pipe. Detailed Implementation

[0025] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] As described in the background section, the current methods for supporting steel reinforcement above intermediate void areas in building engineering are mainly divided into three categories. All three categories have significant drawbacks in terms of support stability, concrete pouring quality, environmental friendliness, and economy, as detailed below:

[0027] Traditional support methods using spacers have poor stability and are prone to displacement. Traditional spacers, often precast concrete blocks or mortar blocks, have a small contact area with the reinforcing steel, resulting in a low coefficient of friction. This makes them prone to slippage and tipping during rebar tying and concrete pouring / vibration. In one large-span beam construction project, spacer slippage caused the upper reinforcing steel to sink by 30mm, exceeding the allowable deviation specified in the standards. This necessitated removal and retying, causing delays and material waste. Spacers also obstruct concrete pouring, resulting in insufficient compaction. Densely arranged spacers can obstruct concrete flow, especially in the gaps, making it difficult for concrete to fill them fully. In one thick slab construction project, spacer obstruction caused multiple internal voids, the largest measuring 200mm × 150mm, requiring later pressure grouting repair, which was prohibitively expensive. Furthermore, the spacers are not recyclable, wasting resources and polluting the environment. Concrete or mortar spacers are disposable materials that are permanently embedded inside components after pouring. This not only increases the weight of the components (spacers account for about 3%-5% of every cubic meter of concrete), but also wastes resources because the materials cannot be recycled. In one residential project, about 8,000 spacers were used for the construction of thick slabs alone, generating about 2.4 tons of construction waste.

[0028] Reinforced concrete stirrup support method: High steel bar waste and high construction costs. Reinforced concrete stirrups are fabricated on-site, requiring a large amount of high-quality steel bars, and the processing technology is complex, resulting in high labor costs; it also affects the bonding performance of concrete. The connection between the reinforced concrete stirrups and the main reinforcing bars and stirrups is mostly fixed by binding, which easily leads to stress concentration at the connection point, and the stirrup reinforcement will form redundant reinforcement nodes with the main reinforcing bars of the component, affecting the bond strength between concrete and steel bars. After the construction of the shear wall of an office building, the test found that the bond strength of concrete at the connection between the stirrup reinforcement and the main reinforcing bars decreased by 15%-20%; removal is difficult and may leave safety hazards. In some projects, in order to ensure the support strength, the stirrup reinforcement is welded to the main reinforcing bars. After pouring, it cannot be removed and remains permanently inside the component. This not only increases the self-weight, but may also affect the overall structure due to welding quality problems; if forcibly removed, it will damage the main reinforcing bars and leave safety hazards.

[0029] Temporary steel pipe support method: low flexibility and poor adaptability. Temporary steel pipe support requires the construction of simple scaffolds, which are greatly limited by the size and shape of the intermediate gap area, making it difficult to adapt to irregular cross-section components or complex reinforcement layout scenarios. In the construction of an irregular column, because the steel pipe support could not fit the reinforcement layout, 30% of the upper reinforcement lacked effective support; it interfered with concrete pouring operations and posed a high safety risk. The steel pipe support runs through the intermediate gap area, which can hinder the operation of the vibrator, resulting in insufficient concrete vibration; at the same time, the connection between the top of the support and the reinforcement is unstable, and it is prone to shaking during the pouring process. The instability of the support can lead to the collapse of the upper reinforcement, causing injuries to construction workers; dismantling is cumbersome and can easily damage components. After the concrete has been poured, it can only be removed after it has reached a certain strength. During the removal process, the already formed concrete surface is easily damaged, resulting in edge damage and surface cracks. In the construction of a bridge beam, the removal of steel pipes caused 12 concrete surface cracks, with the largest crack width reaching 0.3mm, requiring sealing treatment.

[0030] In addition, although there have been a few attempts at airbag-type support devices in the existing technology, there are three major technical obstacles: First, the rigidity of the airbag support is insufficient, and it is easy to deform after inflation, which cannot meet the load-bearing requirements of the upper steel bars. In one test project, the steel bars supported by the airbag sank by 15mm under their own weight. Second, there is a lack of exhaust balance design. When pouring concrete, the external pressure of the airbag increases suddenly, causing the airbag to rupture or the concrete to fail to fill smoothly. In one project, the lack of an exhaust device on the airbag caused the concrete pouring to be obstructed, resulting in delamination inside the component. Third, recovery is difficult. The airbag is tightly bonded to the concrete, or it cannot be removed due to incomplete shrinkage. In one project, about 40% of the airbags were permanently left inside the component due to recovery failure.

[0031] This application provides a reusable airbag for reinforcing bar support. Figure 1 is a plan view of the overall layout of the reusable airbag for reinforcing bar support provided in this application embodiment, and Figure 2 is a cross-sectional view of the reusable airbag for reinforcing bar support provided in this application embodiment. As shown in Figures 1 and 2, the device includes:

[0032] Airbag assembly, exhaust balance assembly, and control assembly;

[0033] The airbag assembly includes an airbag body 1, which forms a rigid support structure by inflation and is adapted to the middle gap area 3 of the steel bar 2.

[0034] The exhaust balance assembly includes an air valve 6, a pressure sensor, a flow regulating valve 7, and an air guide pipe 8. The air valve 6 inflates or deflates the airbag body 1. The pressure sensor is installed on the outer wall of the airbag body 1 to monitor changes in external pressure during concrete pouring. The air guide pipe 8 is located on the outside of the airbag body 1, with one end connected to the air valve 6 and the other end connected to the flow regulating valve 7. The flow regulating valve 7 is used to dynamically adjust the exhaust and inflation flow rates according to the signal from the pressure sensor.

[0035] The control components include a main control unit and an alarm unit. The main control unit is electrically connected to the pressure sensor, air valve 6 and flow regulating valve 7, and is used to dynamically control the exhaust operation based on the pressure signal. The alarm unit is used to issue warning signals under abnormal operating conditions.

[0036] In some embodiments, the airbag body 1 is made of a high-strength composite elastic material, specifically a composite rubber layer 4 and a polyester fiber fabric layer 5. The composite rubber layer 4 is a blend of nitrile rubber and polyurethane, possessing excellent elastic recovery and abrasion resistance, with an elongation at break ≥500% and a tear strength ≥35kN / m, ensuring that the airbag can expand rapidly and withstand loads after inflation. The polyester fiber fabric layer 5 is woven using a plain weave process, with a tensile strength ≥800N / 5cm, and is embedded inside the composite rubber layer 4 to form a reinforcing skeleton, significantly improving the rigidity and deformation resistance of the airbag. This composite material design balances elasticity and support, ensuring a stable support structure after inflation and rapid contraction after deflation, facilitating recovery.

[0037] In some embodiments, the airbag body 1 is a sealed cavity structure, shaped like a cuboid or cylinder, which can be customized according to construction needs to adapt to steel reinforcement components with different cross-sectional dimensions (such as long-span beams, thick plates, or irregularly shaped columns). The cavity dimensions are optimized, with the length, width, and height all adapted to the central gap area 3 of common steel reinforcement 2, ensuring reasonable support coverage. For example, the length of a single airbag body 1 ranges from 500-1000 mm, the width from 300-800 mm, and the height from 200-500 mm; the airbag wall thickness is 8-12 mm, of which the rubber layer thickness is 5-8 mm and the fiber fabric reinforcement layer thickness is 3-4 mm. The airbag wall adopts a layered thickness design: the outer and inner walls are mainly composed of a composite rubber layer 4, providing sealing and elasticity; a polyester fiber fabric layer 5 is embedded inside the composite rubber layer 4 to improve compressive strength. This structural parameter optimizes the volumetric efficiency of the airbag, enabling it to achieve maximum support effect within a limited space. The inflation interface adopts a quick connector design with an interface diameter of 20-30mm and has a leak-proof sealing structure to ensure stable pressure after inflation (pressure drop ≤5% in 24 hours) and no risk of leakage.

[0038] The airbag assembly works on the synergistic effect of gas pressure and material elasticity. During inflation, gas is injected into the airbag body 1 through the flow regulating valve 7, the air guide pipe 8, and the air valve 6, gradually increasing the internal pressure and causing the composite material to expand. Due to the constraint of the fiber fabric layer, the airbag does not deform randomly but expands in a predetermined direction to form a rigid support structure. Its supporting force mainly comes from the tension of the internal air pressure on the airbag wall and the material's own resistance to deformation.

[0039] airbag assembly of Customizable dimensions and rapid inflation / deflation capabilities enhance its adaptability. During construction, a suitable airbag unit is first selected based on the dimensions of the central gap area 3 of the reinforcing bar 2 and placed in the predetermined position. Then, inflation is achieved by connecting an air source via a flow regulating valve 7, an air guide pipe 8, and an air valve 6, causing the airbag to expand tightly against the surface of the reinforcing bar 2, forming stable support. The entire process requires no complex tools; precise support can be achieved simply by controlling the inflation pressure. After completion, during the concrete pouring stage, the airbag remains rigid, ensuring no displacement of the reinforcing bar 2. After pouring, the airbag is deflated by deflating, allowing for easy removal and recovery.

[0040] Compared to traditional support methods, the airbag assembly resolves the conflict between support stability and ease of recovery through material and structural innovation. Its composite material provides high elastic recovery, preventing permanent deformation; customized dimensions ensure wide applicability. Furthermore, the airtight design of the airbag prevents concrete penetration, guaranteeing a high success rate for recovery.

[0041] In some embodiments, the exhaust balancing component is responsible for achieving a dynamic balance between the external pressure of the airbag and the exhaust flow rate during the concrete pouring process, ensuring that the concrete fully fills the middle gap area 3 of the reinforcing bar 2, and avoiding airbag rupture or incomplete pouring.

[0042] The air valve 6 is the core actuator of the exhaust balancing assembly. Since concrete is poured progressively from bottom to top, if the air valve 6 were located in the lower part of the side wall, it would be directly exposed to the rising concrete slurry, leading to blockage. Furthermore, since both exhaust and intake air pass through the air valve 6, trapped air bubbles generated during concrete pouring will naturally rise, causing all the gas that needs to be exhausted to accumulate in the top space of the component. Therefore, the air valve 6 must be located at the top of the side wall of the airbag body 1, employing a one-way throttling structure. It maintains a seal during the airbag inflation and support phase to prevent gas leakage; during the concrete pouring phase, it automatically opens to exhaust when the external pressure reaches a threshold, preventing pressure buildup that could cause airbag deformation or obstruction of concrete filling. The valve core of air valve 6 is made of silicone, possessing excellent sealing and aging resistance, with a service life of at least 100 cycles. The opening pressure threshold is set at 0.1-0.2 MPa, an optimized range that ensures the stability of the airbag during the support phase (inflation pressure is typically below 0.1 MPa) while also responding promptly to pressure changes in the early stages of concrete pouring. The air valve 6 operates based on the principle of differential pressure. When concrete is poured, the grout applies pressure to the outside of the air chamber. If the pressure is below the threshold, the valve core remains closed under the action of the spring or material elasticity. When the pressure reaches or exceeds the threshold (e.g., 0.15 MPa), the valve core is pushed open, and the gas is discharged along the air guide pipe 8. This unidirectional design prevents concrete backflow, while the throttling structure controls the exhaust speed and avoids a sudden drop in pressure.

[0043] The pressure sensor employs a diffused silicon pressure sensor with a measurement range of 0-1.0 MPa and a measurement accuracy of ±0.01 MPa. It monitors pressure changes outside the airbag in real time during concrete pouring, with a data sampling frequency of 10 Hz. High accuracy and fast response ensure timely capture of pressure fluctuations, such as pressure peaks caused by changes in pouring speed or local blockages. For example, the pressure sensor is positioned in the middle of the outer wall of the airbag body 1, comprehensively reflecting the pressure distribution around the airbag and avoiding local measurement errors. Its signal is transmitted via cable to the main control unit of the control component, forming the basis for closed-loop control.

[0044] The flow regulating valve 7 employs an electromagnetic proportional control valve, dynamically adjusting the exhaust flow rate based on the pressure sensor signal to ensure a balance between pouring pressure and exhaust speed. The valve's flow range is 0-50 mL / s, with an adjustment accuracy of ±5 mL / s. Its opening can be adjusted linearly or in segments; for example, 30% opening (15 mL / s exhaust flow) at 0.15-0.3 MPa, 60% opening (30 mL / s flow) at 0.3-0.5 MPa, and 100% opening (40 mL / s flow) at 0.5-0.8 MPa. This design adapts to the layered characteristics of concrete pouring, preventing excessive venting from causing air pocket collapse. The flow regulation is based on a pressure-flow adaptation algorithm: when the pouring pressure increases, the valve opening increases to accelerate venting and release pressure; when the pressure decreases, the opening decreases, achieving a dynamic balance between pouring and venting.

[0045] The air duct 8 and filter device ensure unobstructed exhaust channels and prevent blockages. The air duct 8 uses a PVC reinforced flexible hose with an inner diameter of 15-25mm and a pressure resistance of ≥1.5MPa, offering flexibility for easy installation within the gaps in the reinforcing bars 2. The air duct 8 connects to the air valve 6 and, through the flow regulating valve 7, is connected to the external environment, forming a low-pressure exhaust path. The filter device, located at the inlet of the air valve 6, uses a stainless steel filter screen with a filtration accuracy of 100-150 mesh, effectively preventing impurities such as concrete slurry and sand from entering the pipe, thus preventing blockages and ensuring smooth exhaust. This design extends component lifespan and reduces maintenance requirements.

[0046] In some embodiments, the main control unit uses a programmable logic controller (PLC) as its control core, such as an S7-200 SMART PLC. It incorporates a pressure-flow adaptation algorithm, establishing a correspondence between pressure and flow to achieve adaptive control. Based on real-time data collected by the pressure sensor, it automatically calculates the optimal exhaust flow rate and sends control commands to the flow regulating valve 7, with a response time ≤0.5s, ensuring the timeliness and accuracy of exhaust balance. The main control unit has multi-channel input / output interfaces, allowing simultaneous connection to multiple sensors and actuators (air valve 6 and flow regulating valve 7), supporting synchronous control of multiple airbags.

[0047] In some embodiments, the alarm unit includes an audible and visual alarm and a fault indicator light. When abnormal situations occur, such as pouring pressure exceeding the threshold (≥1.0MPa), exhaust flow exceeding the limit (≤1mL / s or ≥50mL / s), or air pump failure (air pumping rate ≤5L / min), the audible and visual alarm emits a continuous alarm signal (sound intensity ≥85dB, light flashing frequency 1Hz), and the fault indicator light lights up accordingly, reminding construction personnel to handle the situation in a timely manner and avoid safety accidents.

[0048] In some embodiments, this application also provides an overall workflow for a retrievable airbag for steel reinforcement support, specifically including:

[0049] Concrete pouring begins, employing a layered pouring method with each layer 300mm thick. The pouring speed is controlled at 0.5m³ / h to avoid uneven concrete flow or localized pressure concentration in the air chambers caused by pouring too thickly at once, ensuring the exhaust system can gradually adapt to pressure changes. The control components collect signals from the pressure sensor in real time. When the concrete pouring pressure reaches 0.15MPa, air valve 6 automatically opens, and flow regulating valve 7 dynamically adjusts the exhaust volume according to pressure changes.

[0050] When the pressure is between 0.15 and 0.3 MPa, the flow regulating valve 7 is opened at 30% and the exhaust flow rate is 15 mL / s. When the pressure is at a lower level, the flow regulating valve 7 is opened at a smaller degree and the exhaust flow rate is kept at a low speed to ensure that excessive exhaust is not vented during the initial filling of concrete and to avoid premature contraction of the air bladder affecting the stability of the support.

[0051] When the pressure is between 0.3 and 0.5 MPa, the flow regulating valve 7 is open at 60%, and the exhaust flow rate is 30 mL / s. When the pressure rises to a moderate level, the valve opening increases, and the exhaust flow rate accelerates. At this time, the concrete flow accelerates, and it is necessary to speed up the exhaust to prevent pressure buildup. That is, the external pressure and internal exhaust need to maintain a dynamic balance.

[0052] When the pressure is between 0.5 and 0.8 MPa, the flow regulating valve 7 is 100% open, and the exhaust flow rate is 40 mL / s. As the pressure increases further, the valve opens to its maximum extent, and the exhaust flow rate reaches its peak. This is designed for densely poured areas, releasing pressure through high-speed exhaust to prevent air pocket deformation or obstruction of concrete filling.

[0053] The entire adjustment process is automatically completed by the algorithm of the control component. This segmented adjustment ensures the coordination of pouring and venting.

[0054] During the pouring process, the control components continuously monitor key parameters (such as pressure and exhaust flow). Construction personnel monitor pouring pressure and exhaust flow in real time via a touchscreen. If a sudden pressure increase (exceeding the safety limit, e.g., ≥0.8MPa) or a sudden flow decrease (below normal levels, e.g., ≤3mL / s) occurs, an audible and visual alarm will sound. Construction personnel will immediately stop pouring and check for blockages in the exhaust pipe and damage to the airbags. If the exhaust pipe is blocked, it may be due to impurities in the concrete; the solution is to clean the filter screen of the filtration device. If an airbag is damaged, the valve of the damaged airbag unit will be closed, and the backup airbag unit will be activated. This demonstrates the system's redundancy design, avoiding single points of failure through independent control of multiple airbags.

[0055] When pouring to the top, slow down the pouring speed and keep the flow regulating valve 7 open at 50% to ensure that the top concrete is fully filled and there are no air bubbles left. To address the problem of air bubbles or incomplete filling in the top area: slow down the pouring to reduce turbulence and avoid air entrainment; while a medium opening for venting ensures that residual gas is slowly discharged, while preventing the concrete from settling due to excessive venting; after pouring is completed, keep the air valve 6 open for a period of time, such as 30 minutes, to discharge residual gas inside the component and ensure that there are no air gaps inside before the concrete hardens, thereby improving the overall density and durability of the component.

[0056] Dynamic pressure regulation and layered pouring achieve a precise balance between concrete flow and air release, effectively avoiding defects such as honeycombing and voids. An adaptive pressure mechanism ensures stable external pressure on the airbags, guaranteeing uniform density within the components and improving structural durability. The redundant multi-airbag design further enhances system reliability, making it suitable for complex construction environments. The entire process supports complete airbag recovery, reducing construction waste; simultaneously, automated control lowers labor costs, achieving a balance between green construction and resource conservation.

[0057] The components in the accompanying drawings of this invention are for illustrative purposes only and are not intended to represent specific dimensions. The specific dimensions are determined based on actual production requirements, and the materials of each component can be replaced as needed.

[0058] All electrical components in this invention are commercially available conventional devices known to those skilled in the art. Models can be selected or customized according to actual needs. The setting method, installation method and electrical connection method can be easily understood by those skilled in the art by following the instructions for use, and will not be described in detail here.

[0059] The above embodiments are merely illustrative examples and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the scope of protection of this application.

Claims

1. A recyclable airbag for reinforcing bar support, characterized in that, include: The airbag assembly includes an airbag body (1), which forms a rigid support structure by inflation and is adapted to the middle gap area (3) of the reinforcing bar (2). The airbag body (1) includes an air valve (6), a pressure sensor, a flow regulating valve (7), and an air guide pipe (8). The air valve (6) is used to inflate or vent the airbag body (1). The pressure sensor is installed on the outer wall of the airbag body (1) to monitor the external pressure changes during the concrete pouring process. The air guide pipe (8) is located on the outside of the airbag body (1), with one end connected to the air valve (6) and the other end connected to the flow regulating valve (7). The flow regulating valve (7) is used to dynamically adjust the venting and inflation flow according to the signal from the pressure sensor. The control assembly includes a main control unit and an alarm unit. The main control unit is electrically connected to the pressure sensor, the air valve (6), and the flow regulating valve (7) to dynamically control the venting operation according to the pressure signal. The alarm unit is used to issue a warning signal under abnormal working conditions.

2. A recyclable airbag for reinforcing bar support according to claim 1, characterized in that, The airbag body (1) is formed by combining a composite rubber layer (4) and a polyester fiber fabric layer (5).

3. A recyclable airbag for reinforcing bar support according to claim 2, characterized in that, The composite rubber layer (4) is a blend of nitrile rubber and polyurethane, and the polyester fiber fabric layer (5) is made by plain weave and embedded inside the composite rubber layer (4).

4. A recyclable airbag for reinforcing bar support according to claim 3, characterized in that, The shape of the airbag body (1) is a cuboid or a cylinder.

5. A recyclable airbag for reinforcing bar support according to claim 1, characterized in that, The air valve (6) is located on the top of the side wall of the airbag body (1).

6. A recyclable airbag for reinforcing bar support according to claim 5, characterized in that, The valve core of the air valve (6) is made of silicone material. The air valve (6) is a one-way throttling structure, which is used to ensure that the airbag assembly remains sealed during the inflation support stage and automatically opens when the concrete pouring pressure reaches the opening pressure threshold.

7. A recyclable airbag for reinforcing bar support according to claim 6, characterized in that, The air valve (6) is equipped with a filter device at its inlet. The filter device is made of stainless steel mesh and is used to block concrete slurry or impurities from entering the exhaust pipe.

8. A recyclable airbag for reinforcing bar support according to claim 1, characterized in that, The pressure sensor is a diffused silicon pressure sensor, the flow regulating valve (7) is an electromagnetic proportional regulating valve, and the air guide pipe (8) is a PVC reinforced hose.

9. A recyclable airbag for reinforcing bar support according to claim 1, characterized in that, The main control unit is configured to calculate the optimal exhaust flow rate based on the real-time data from the pressure sensor and control the opening degree of the flow regulating valve (7).

10. A recyclable airbag for reinforcing bar support according to claim 1, characterized in that, The main control unit is equipped with a multi-channel input / output interface, which can simultaneously connect to multiple pressure sensors, air valves (6) and flow regulating valves (7) to control multiple airbag components synchronously.

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