A pre-buried inflatable water-blocking airbag for the front end of a basement entrance

Abstract

The application relates to the technical field of flood-preventing and drainage equipment, and provides a pre-buried air-filled water-blocking air bag for the front end of a basement entrance, which comprises an air bag body, a pre-buried embedding mechanism and an air filling device. The air bag body is made of flexible waterproof material, is hollow inside, and forms a water-blocking wall after being inflated. The pre-buried embedding mechanism is arranged on both sides and the bottom of the air bag body, prevents lateral displacement under the impact of water pressure, stops water, and provides mechanical limiting after inflation and unfolding. The air filling device comprises an air compressor body and a pipeline, a water level sensor or a remote starting device is arranged on the side wall, a telecommunication signal is sent to start inflation when the water level reaches the warning level, and the air bag is switched to the working state within a set time. The air bag has the advantages of high space utilization, no influence on passing, automatic and rapid response, sealing stability, convenience in maintenance and replacement, and can effectively block the flood from entering the basement.

Description

Technical Field

[0001] This application relates to the technical field of flood control and drainage equipment, and in particular to a pre-embedded inflatable water-blocking airbag for use at the front end of a basement entrance. Background Technology

[0002] The entrance to the underground parking garage faces the risk of flooding during heavy rain. When heavy rainfall causes the road drainage system to operate beyond its capacity, water flows down the entrance ramp, creating water pressure in the low-lying area at the bottom of the entrance. Once the water level exceeds the ground level at the entrance, the water will flow back into the underground parking garage.

[0003] Currently, common flood prevention measures mainly include temporarily placing sandbags at the garage entrance and installing removable flood barriers. Sandbags are usually made by filling woven bags with sand and stacking them at the front of the entrance, using their own weight to resist water pressure; flood barriers are mostly plate-shaped components made of aluminum alloy or stainless steel, which are manually moved to the entrance when needed to form a horizontal barrier.

[0004] However, the implementation of such traditional flood control methods all rely on manual operation. Flooding occurs suddenly, with a short window between water accumulation and the water level rising to the warning height, leaving limited preparation time for on-site personnel. In cases of sudden intensification of heavy rain, the temporary movement of sandbags or the installation of flood barriers is difficult to complete quickly. If the water level has already risen to a certain depth, workers are hampered when moving heavy objects, significantly reducing work efficiency, and there is a risk of being impacted by the water flow while working in the water. Furthermore, sandbags are difficult to stack to form a continuous seal, and leaks often occur at the gaps between the flood barriers and the ground and side walls, requiring additional sealing material. Summary of the Invention

[0005] In view of this, this application aims to provide a pre-embedded inflatable water-blocking airbag for the front end of a basement entrance, in order to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the technical solution of this application is implemented as follows: An embedded inflatable water-blocking airbag for use at the front end of a basement entrance, comprising: The airbag assembly is normally folded and stored, including an airbag body for forming a water barrier after inflation, and fitting structures disposed at the bottom and sides of the airbag body. The limiting structure includes a concave slide rail disposed on the ground and a side wall groove disposed on the side wall. The fitting structure is correspondingly engaged in the concave slide rail and the side wall groove to constrain the displacement of the airbag assembly during inflation and deployment. An inflation device is connected to the interior of the airbag body via a pipe and is used to inflate the airbag body with gas.

[0007] Furthermore, the fitting structure includes a bottom protrusion disposed at the bottom of the airbag body, and lateral protrusions disposed at the two side edges of the airbag body; The bottom protrusion has a T-shaped cross-section and is slidably engaged within the concave slide rail. The lateral protrusion has a trapezoidal cross-sectional shape, which is formed by extending outward from the original contour shape at both ends of the airbag body. The lateral protrusion expands and embeds into the side wall groove during the inflation of the airbag body.

[0008] Furthermore, the limiting structure also includes a pre-embedded foundation trench, which is opened underground at the front end of the basement entrance; The concave slide rail is disposed at the bottom of the pre-embedded base groove; The airbag assembly is completely flat within the pre-embedded base groove in its normal folded storage state.

[0009] Furthermore, it also includes a top cover that covers the upper opening of the pre-embedded foundation trench; The upper surface of the top cover is flush with the surrounding ground, and is used to protect the airbag assembly and allow vehicles and pedestrians to pass when the airbag assembly is in the folded and stowed state.

[0010] Furthermore, the top cover is a rigid load-bearing cover plate, and the top cover is removably placed above the pre-embedded foundation trench; The top cover is lifted by the airbag body when the airbag assembly is inflated and deployed, and is re-covered on top of the pre-embedded base groove after the airbag assembly is depressurized, folded and retracted.

[0011] Furthermore, the inflation device includes an inflation body, inflation piping, and sensor components; One end of the inflation tube is connected to the air outlet of the inflation device, and the other end of the inflation tube is connected to the air inlet of the airbag body. The sensor assembly is installed on the side wall of the basement and is used to detect water level signals.

[0012] Furthermore, the inflation device also includes a control box, which is electrically connected to the sensor assembly and the inflation body respectively; The control box is equipped with a remote communication module, which is used to receive external remote start commands. The control box is used to control the inflation unit to start inflation based on the water level signal of the sensor assembly or the remote start command.

[0013] Furthermore, the sensor assembly generates a trigger signal and sends it to the control box when it detects that the water level has reached a preset warning height; After receiving the trigger signal, the control box controls the inflation unit to start. The inflation unit quickly inflates the airbag body through the inflation pipeline, so that the airbag body switches from the folded storage state to the rated inflation working state within a set time.

[0014] Furthermore, the concave slide rail extends horizontally at one end near the ground to form an extension portion, which is pre-embedded below the ground to increase the contact area between the concave slide rail and the ground and improve the bonding strength.

[0015] Furthermore, the airbag body is made of a high-strength flexible waterproof fabric, which is a polyester fiber fabric, nylon fiber fabric, or aramid fiber fabric.

[0016] Compared with existing technologies, the pre-embedded inflatable water-blocking airbag for the front end of a basement entrance proposed in this application has the following advantages: (1) This application sets the airbag assembly to a folded storage state in the normal state and places it flat in the pre-embedded foundation trench, and covers the foundation trench with a top cover whose upper surface is flush with the surrounding ground. This achieves the effect that the airbag assembly is completely hidden underground in the non-working state and does not affect the passage of vehicles and pedestrians, thus solving the problem that temporary water-blocking facilities occupy ground space and hinder daily use in the prior art.

[0017] (2) This application uses the interlocking structure at the bottom and sides of the airbag body to be respectively inserted into the concave slide rail on the ground and the side wall groove on the side wall. The extension formed by the concave slide rail extending horizontally at the end near the ground increases the contact area with the ground to improve the bonding strength. After the airbag is inflated and deployed, the displacement of the airbag assembly is constrained by the limiting structure. This achieves the effect of the airbag maintaining a stable position when subjected to water pressure, avoiding lateral slippage and floating, and forming a continuous sealing interface through the cooperation of the interlocking structure and the groove. This solves the problem that traditional sandbags and water baffles are difficult to form a reliable seal and are prone to displacement and leakage under water pressure.

[0018] (3) This application sets up an inflation device that communicates with the inside of the airbag body, arranges a sensor assembly for detecting water level signals on the side wall, and sets up a control box with a remote communication module. The control box controls the inflation body to start inflation according to the water level signal or remote start command. This achieves the effect of quickly and automatically triggering inflation when the water reaches the warning height or according to the remote command, so that the airbag expands from the folded state to the rated working state within a set time to form a water barrier. This solves the problems of the prior art that rely on manual operation, slow response speed and safety risks when operating in water. At the same time, this application uses high-strength flexible waterproof fabric to make the airbag body, which achieves the effect of maintaining good water pressure resistance and wear resistance of the water barrier under repeated inflation and deflation, and extending the service life of the device. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic cross-sectional view of the folded state of the pre-embedded inflatable water-blocking airbag for the front end of the basement entrance as described in the embodiment of this application. Figure 2 This is a schematic cross-sectional view of the inflated state of the pre-embedded inflatable water-blocking airbag used at the front end of the basement entrance as described in the embodiment of this application. Figure 3 This is a three-dimensional structural diagram of the pre-embedded inflatable water-blocking airbag for the front end of a basement entrance as described in an embodiment of this application.

[0020] Explanation of reference numerals in the attached figures: 1. Limiting structure; 101. Concave slide rail; 102. Side wall groove; 103. Embedded base trench; 2. Airbag assembly; 201. Airbag body; 202. Bottom protrusion; 203. Lateral protrusion; 3. Inflation device; 301. Inflation body; 302. Inflation pipeline; 4. Top cover. Detailed Implementation

[0021] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0023] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0025] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0027] In recent years, due to weather conditions, heavy rains have frequently caused flooding to seep into underground parking garages in residential areas and buildings. Currently, common flood prevention measures for underground parking garages mainly involve temporarily placing sandbags or installing removable flood barriers at the garage entrance before heavy rains or after flooding occurs. These traditional flood prevention methods have several drawbacks. Firstly, these measures rely on manual operation and are not timely. Whether it's sandbags or assembled flood barriers, they all need to be manually moved and placed before or during the rain. Flooding is usually sudden, leaving property management staff with very limited preparation time, especially when heavy rains suddenly intensify, making it difficult to deploy temporary flood prevention facilities in a timely manner. Secondly, when backflow and flooding have already occurred and the road surface water level has risen, it is not only inefficient for staff to go out and move heavy objects, but they also face the danger of being swept away or engulfed by the rapid current. If the garage entrance is already partially flooded, personnel movement is hindered, making the moving work almost impossible. Current technologies lack a suitable underground parking garage flood prevention device that can be concealed and stored during non-flood seasons without occupying space or affecting normal garage use, while simultaneously providing a rapid and automatic response to form an effective water barrier during flooding. This device cannot solve the problems existing in current technologies. Such a device can complement manual flood barriers. Under normal circumstances, manual flood barriers take precedence in blocking water. However, when a sudden downpour occurs and manual flood barriers cannot be installed in time or pose a safety risk, this device automatically triggers, rapidly inflates, and deploys, serving as a second line of defense to completely block water and improve the flood prevention reliability of the underground parking garage.

[0028] The purpose of this application is to overcome the shortcomings of the prior art and provide a pre-embedded inflatable water-blocking airbag for the front end of the basement entrance, which can be hidden underground when not in use without occupying space or affecting the passage and aesthetics of the basement entrance, and can quickly expand and deploy in the event of flooding to form a stable sealed water-blocking wall with the underground garage structure.

[0029] To achieve the above objectives, this application provides a pre-embedded inflatable water-retaining airbag for the front end of a basement entrance, comprising an airbag assembly 2, a limiting structure 1, and an inflation device 3. The airbag assembly 2 is normally folded and includes an airbag body 201 for forming a water-retaining wall after inflation, and fitting structures disposed at the bottom and sides of the airbag body 201. The limiting structure 1 includes a concave slide rail 101 disposed on the ground and a side wall groove 102 disposed on the side wall. The fitting structures are correspondingly engaged in the concave slide rail 101 and the side wall groove 102 to constrain the displacement of the airbag assembly 2 during inflation. The inflation device 3 is connected to the interior of the airbag body 201 via a pipe for inflating gas into the airbag body 201. Through the cooperation of the fitting structure and the limiting structure 1, the positional displacement of the airbag during inflation is limited, ensuring the continuity and stability of the water-retaining interface.

[0030] Based on the invention's objective of improving fit stability and sealing performance, in this embodiment, the fitting structure includes a bottom protrusion 202 disposed at the bottom of the airbag body 201, and lateral protrusions 203 disposed on both sides of the airbag body 201. The bottom protrusion 202 has a T-shaped cross-section and is slidably engaged within the concave slide rail 101. The lateral protrusions 203 have a trapezoidal cross-section and are formed by extending outward from the original contours at both ends of the airbag body 201. The lateral protrusions 203 expand and embed themselves into the sidewall grooves 102 during the inflation of the airbag body 201. The T-shaped bottom protrusion 202, when engaged with the concave slide rail 101, can form a mechanical engagement in the vertical direction, preventing the airbag body 201 from floating upwards under water pressure. The trapezoidal lateral protrusion 203, after the airbag is inflated, can fully fill the internal space of the side wall groove 102, forming a sealing interface in the side and reducing the possibility of water leakage from the side gaps.

[0031] To achieve the effect of concealing and storing the device in normal operation, the limiting structure 1 in this embodiment also includes a pre-embedded base trench 103, which is located underground at the front end of the basement entrance. A concave slide rail 101 is disposed at the bottom of the pre-embedded base trench 103. The airbag assembly 2 is placed flat inside the pre-embedded base trench 103 in the normally folded and stored state. Storing the airbag assembly 2 in the underground pre-embedded base trench 103 avoids the device occupying ground passage space and ensures normal passage function of the basement entrance.

[0032] Based on the invention's objective of protecting the internal airbag assembly and maintaining ground flatness, in this embodiment, the pre-embedded inflatable water-blocking airbag also includes a top cover 4, which covers the upper opening of the pre-embedded base trench 103. The upper surface of the top cover 4 is flush with the surrounding ground, serving to protect the airbag assembly 2 when it is in a folded and stowed state, while allowing vehicles and pedestrians to pass through. The flush-mounted top cover 4 maintains the integrity of the ground, does not disrupt the visual effect of the building facade, and can withstand the loads of vehicles and pedestrians, reducing the probability of external debris entering the pre-embedded base trench 103 and damaging the airbag assembly 2.

[0033] To accommodate the airbag inflation, deployment, and retraction process, the top cover 4 in this embodiment is a rigid load-bearing cover plate, which is removably placed above the pre-embedded foundation trench 103. The top cover 4 is lifted by the airbag body 201 when the airbag assembly 2 inflates and deploys, and is repositioned above the pre-embedded foundation trench 103 after the airbag assembly 2 is depressurized and folded back in. The rigid load-bearing top cover 4 meets the load-bearing requirements for daily passage, and its removable design allows the top cover to be easily lifted and deployed during airbag inflation. During retraction, the top cover can be manually reset to restore the ground to its passable state. (Refer to...) Figure 1 This is a schematic cross-sectional view of the folded state of the pre-embedded inflatable water-blocking airbag for the front end of a basement entrance as described in this application embodiment. The figure shows the airbag assembly 2 housed inside the pre-embedded base trench 103, with the top cover 4 covering the pre-embedded base trench 103 in its normal state. At this time, the bottom protrusion 202 is located inside the concave slide rail 101, and the lateral protrusion 203 is in a folded state. (Refer to...) Figure 2 The figure shows a cross-sectional view of the inflated state of the pre-embedded inflatable water-blocking airbag for the front end of the basement entrance as described in the embodiment of this application. The figure shows the working state after the airbag body 201 is inflated and unfolded, with the bottom protrusion 202 mechanically engaging with the concave slide rail 101 and the lateral protrusion 203 embedded in the side wall groove 102. At this time, the top of the airbag reaches the designed water-blocking height, forming a continuous water-blocking interface.

[0034] Based on the invention's objective of achieving automatic detection and inflation triggering, in this embodiment, the inflation device 3 includes an inflation body 301, an inflation pipe 302, and a sensor assembly. One end of the inflation pipe 302 is connected to the air outlet of the inflation body 301, and the other end is connected to the air inlet of the airbag body 201. The sensor assembly is installed on the side wall of the basement and is used to detect water level signals. The inflation pipe 302 is laid out in a pre-embedded manner, which can avoid the pipe being exposed and affecting passage, while also protecting the pipe and extending the service life of the device.

[0035] To enhance the automation and operational flexibility of the device, the inflation device 3 in this embodiment also includes a control box, which is electrically connected to both the sensor assembly and the inflation body 301. The control box is equipped with a remote communication module for receiving external remote start commands. The control box controls the inflation body 301 to begin inflation based on the water level signal from the sensor assembly or the remote start command. With the remote communication module, management personnel can remotely trigger the device's start from a monitoring room or mobile device, eliminating the need for on-site personnel and improving operational safety in extreme weather conditions.

[0036] Based on the invention's objective of ensuring rapid response of the protection device, in this embodiment, the sensor component generates a trigger signal and sends it to the control box when it detects that the water level has reached a preset warning height. Upon receiving the trigger signal, the control box controls the inflator 301 to start. The inflator 301 rapidly inflates the airbag body 201 through the inflation pipe 302, causing the airbag body 201 to switch from a folded storage state to a rated inflated working state within a set time. This automatically triggered working mode reduces delays in manual response, allowing water-blocking operations to begin in the early stages of water level rise, effectively shortening the early warning response time for basement flooding. In this embodiment, the preset warning height is set to 0.5 meters, which covers the water level range of most cities experiencing mild flooding, adapting to the flood control needs of common underground garage entrances. Simultaneously, it controls the overall volume and inflation time of the airbag, balancing protective capability and response speed.

[0037] To enhance the bonding strength between the limiting structure and the ground foundation, in this embodiment, the concave slide rail 101 extends horizontally at one end near the ground to form an extension. This extension is embedded below the ground to increase the contact area between the concave slide rail 101 and the ground, thereby improving the bonding strength. The horizontally extending extension can disperse the load transmitted during airbag inflation and water pressure, reducing the risk of the concave slide rail 101 detaching from the foundation and improving the overall mechanical reliability of the structure.

[0038] To ensure the waterproof and mechanical properties of the airbag body, in this embodiment, the airbag body 201 is made of a high-strength flexible waterproof fabric, which can be polyester fiber fabric, nylon fiber fabric, or aramid fiber fabric. These types of fiber fabrics possess good tensile strength and abrasion resistance, can withstand the combined effects of inflation pressure and water pressure, and also have stable waterproof performance, reducing the risk of leakage during long-term use. Aramid fiber fabric has higher tensile strength and is suitable for applications with greater water barrier height and higher water pressure, while polyester fiber fabric and nylon fiber fabric are lower in cost and suitable for conventional flood control needs. The appropriate fabric can be flexibly selected based on actual working conditions.

[0039] This application achieves several technical benefits through its pre-embedded structural design and automatic inflation mode. First, it offers high space utilization and minimal disruption to daily traffic. The airbag assembly 2 is normally in a depressurized, folded storage state, housed within the underground pre-embedded trench 103, with a top cover 4 on top. This minimizes the impact on daily vehicle and pedestrian traffic and maintains the integrity of the building's facade. Second, it boasts a fast response time and high degree of automation. Once a rise in water level is detected, the system can be automatically or remotely triggered, and the inflation device 3 rapidly supplies air, causing the airbag to quickly inflate and form a water barrier, effectively shortening the response time to basement flooding. Third, it provides a stable structure and good sealing performance. Through the tight cooperation between the bottom protrusion 202, the side protrusions 203, and the corresponding limiting structure 1, as well as the expansion force after inflation, the airbag can be securely locked at the entrance, forming a reliable sealing interface to block water flow. The limiting structure 1 bears the main water pressure load, while the airbag body 201 primarily functions as an adaptive sealing and filling mechanism, reducing the stress load on the airbag body 201 and extending its service life. Fourth, it is easy to maintain and replace. Due to the sliding mounting structure, when the airbags are old and need to be replaced, you only need to open the top cover 4 on the ground, pull out the old airbag along the slide rail, and put in the new airbag. The maintenance operation is relatively simple.

[0040] This embodiment is a device system embodiment for a pre-embedded inflatable water-blocking airbag used at the front end of a basement entrance. The specific structure and layout of each component are described in detail with reference to the accompanying drawings.

[0041] Reference Figure 1 A pre-embedded trench 103 is excavated at the front end of the basement entrance to form a pre-embedded foundation trench 103. The length of the pre-embedded foundation trench 103 is adapted to the passage width of the basement entrance, and the depth is sufficient to accommodate the folded airbag assembly 2 and the top cover 4. A concave slide rail 101 is fixedly installed at the bottom of the pre-embedded foundation trench 103. The concave slide rail 101 extends horizontally to both sides at the end near the ground to form an extension. The extension is poured into the ground concrete foundation to increase the contact area with the foundation and improve the anchoring strength. Side wall grooves 102 are opened at corresponding positions on the side walls of the basement entrance. The height of the side wall grooves 102 covers the height range of the airbag after it is deployed. The opening of the groove faces the inside of the entrance to accommodate the lateral protrusions 203 of the airbag. The concave slide rail 101 and the side wall grooves 102 together constitute a limiting structure 1 to restrain the displacement of the airbag assembly 2 when it is inflated and deployed.

[0042] The airbag assembly 2 is integrally set inside the pre-embedded base trench 103, including the airbag body 201, the bottom protrusion 202, and the side protrusions 203. The airbag body 201 is a hollow, elongated, flexible structure made of high-strength, flexible, waterproof fabric. In this embodiment, polyester fiber coated fabric is used, which has both good waterproof and tensile properties and can meet the working conditions requiring a water-blocking height of 0.5 meters. The bottom protrusion 202 is located at the bottom of the airbag body 201 and is integrally sewn with the airbag body 201. Its cross-section is T-shaped, and the lateral flange of the T-shape is inserted into the groove of the concave slide rail 101 to form a sliding connection. The side protrusions 203 are located on both sides of the airbag body 201, extending outward from the outline of the airbag body 201 and integrally formed. Their cross-section is trapezoidal. When the airbag is folded, the side protrusions 203 are folded and stored together with the body. When the airbag is inflated, they expand with the body and are embedded inside the side wall grooves 102.

[0043] The top cover 4 is a rigid load-bearing cover plate, which can be made of reinforced concrete or metal. It is placed at the top opening of the pre-embedded foundation trench 103, and its upper surface is flush with the surrounding ground. Under normal conditions, the top cover 4 bears the load of vehicles and pedestrians, protects the internal airbag assembly 2 from external damage, and maintains the flatness of the ground. When the airbag body 201 is inflated, the upward thrust of the airbag can lift the top cover 4, providing space for the airbag to deploy.

[0044] The inflation device 3 includes an inflation body 301, an inflation pipeline 302, a sensor assembly, and a control box. The inflation body 301 can be installed in an equipment room inside the basement to avoid rainwater immersion. The inflation pipeline 302 is pre-embedded along the underground structure, with one end connected to the air outlet of the inflation body 301 and the other end connected to the air inlet of the airbag body 201. A sealing ring structure is installed at the pipeline interface to reduce the risk of air leakage. The sensor assembly uses a water level sensor, installed on the side wall of the basement entrance, with the detection end facing the road surface, for real-time monitoring of the road surface water level. The control box is electrically connected to both the water level sensor and the inflation body 301. It contains a control circuit and a remote communication module, capable of receiving water level signals and remote commands to control the start and stop of the inflation body 301. The airbag body 201 is also equipped with an exhaust valve, which can be electrically or manually controlled to release the gas inside the airbag after the floodwaters recede, allowing the airbag to return to its folded state.

[0045] Through simulation and mechanical analysis, it was found that after the concave slide rail 101 with horizontal extension is combined with the concrete foundation, its pull-out bearing capacity is increased by about 40% compared with the ordinary direct-buried slide rail. It can better withstand the upward load brought by the inflation of the airbag and water pressure, and reduce the risk of the slide rail coming off the foundation.

[0046] This embodiment is a working method embodiment of the above-mentioned pre-embedded inflatable water-blocking airbag, and the state transition process and working logic of the device are described in detail.

[0047] State 1 is the depressurized, folded, and stored state, corresponding to normal non-flood season operating conditions. (Refer to...) Figure 1 At this point, the airbag body 201 is depressurized and fully folded into a flat state, lying flat in the pre-embedded foundation trench 103. The bottom protrusion 202 is engaged with the concave slide rail 101, and the lateral protrusions 203 fold together with the body. The top cover 4 covers the pre-embedded foundation trench 103, and the entrance passage is not affected. In this state, the entire device is hidden underground, does not occupy ground space, and does not affect the building's appearance or normal passage.

[0048] State two represents the triggering and inflation process, corresponding to the initial stage of flooding. When flooding occurs due to heavy rain, the water level at the entrance of the underground parking garage begins to rise. When the sensor component installed on the side wall detects that the water level has reached the preset 0.5-meter warning height, it sends a trigger electrical signal to the control box. After receiving the signal, or after receiving a remote start command from the management personnel, the control box controls the inflation unit 301 to start and opens the inflation valve. Compressed air enters the airbag body 201 through the inflation pipe 302, and the airbag body 201 gradually inflates, pushing the top cover 4 upwards and gradually unfolding in the vertical direction. During this process, the bottom protrusion 202 is always engaged inside the concave slide rail 101, limiting the horizontal displacement and upward floating tendency of the airbag, while the lateral protrusion 203 gradually extends into the side wall groove 102 as the airbag inflates.

[0049] State 3 is the rated inflation working state, corresponding to the water-blocking operation condition. (Refer to...) Figure 2 and Figure 3 The airbag body 201 inflates to its rated working pressure within a set time. At this point, the airbag fully unfolds upright, and the bottom protrusion 202 forms a tight mechanical engagement with the concave slide rail 101. The lateral protrusions 203 fully fill the internal space of the side wall groove 102, forming a continuous water-retaining wall to prevent external floodwater from entering the basement. In this state, the water pressure is mainly borne by the limiting structure 1, and the airbag body 201 adaptively fills the gaps by the tension of its inflation, achieving a sealing and water-stopping effect. Fluid simulation analysis shows that, with a water-retaining height of 0.5 meters, the combined leakage from the sides and bottom of the water-retaining airbag using this structure can be controlled to within 0.1 liters per minute per meter, demonstrating superior sealing performance compared to traditional sandbag-based water-retaining structures.

[0050] State four is the receding and recovery state, corresponding to the reset condition after the flooding ends. After the flooding recedes, the air vent valve of the airbag is opened manually or electrically, the gas inside the airbag body 201 is discharged, the pressure gradually decreases, and it gradually folds back to its flat state under its own weight and the elastic force of the material. The staff resets the top cover 4 and covers it again on the pre-embedded foundation trench 103, and the device returns to its initial storage state.

[0051] If the airbag body 201 ages or is damaged and needs to be replaced during long-term use, the staff can open the top cover 4, pull the old airbag component 2 out from the end along the concave slide rail 101, and then push the new airbag component 2 in along the slide rail to complete the replacement operation. The maintenance process is simple and does not require large-scale excavation of the ground.

[0052] This device can be used in conjunction with artificial flood barriers. Under normal rainfall conditions, artificial flood barriers will take the lead in blocking water. When a rainstorm comes quickly and there is no time to install artificial flood barriers or when there is a safety risk on site, the pre-embedded inflatable water barrier airbag will automatically deploy to serve as a second line of defense and improve the overall reliability of the underground garage flood control system.

[0053] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A pre-embedded inflatable water-blocking airbag for use at the front end of a basement entrance, characterized in that, include: Airbag assembly (2), which is normally folded and stored, includes an airbag body (201) for forming a water barrier after inflation, and a fitting structure disposed at the bottom and sides of the airbag body (201); The limiting structure (1) includes a concave slide rail (101) set on the ground and a side wall groove (102) set on the side wall. The fitting structure is correspondingly inserted into the concave slide rail (101) and the side wall groove (102) to constrain the displacement of the airbag assembly (2) when it is inflated and deployed. An inflation device (3) is connected to the interior of the airbag body (201) via a pipeline and is used to inflate gas into the airbag body (201).

2. The pre-embedded inflatable water-blocking airbag for the front end of a basement entrance as described in claim 1, characterized in that, The fitting structure includes a bottom protrusion (202) disposed at the bottom of the airbag body (201) and lateral protrusions (203) disposed at the two side edges of the airbag body (201). The bottom protrusion (202) has a T-shaped cross-section and is slidably engaged in the concave slide rail (101). The lateral protrusion (203) has a trapezoidal cross-sectional shape, which is formed by extending outward from the original contour shape at both ends of the airbag body (201). The lateral protrusion (203) expands and embeds itself into the side wall groove (102) during the inflation of the airbag body (201).

3. The pre-embedded inflatable water-blocking airbag for the front end of a basement entrance as described in claim 1, characterized in that, The limiting structure (1) also includes a pre-embedded foundation trench (103), which is located underground at the front end of the basement entrance; The concave slide rail (101) is disposed at the bottom of the pre-embedded base groove (103); The airbag assembly (2) is completely flat in the pre-embedded base groove (103) in the daily folded storage state.

4. The pre-embedded inflatable water-blocking airbag for the front end of a basement entrance as described in claim 3, characterized in that, It also includes a top cover (4), which covers the upper opening of the pre-embedded foundation trench (103); The upper surface of the top cover (4) is flush with the surrounding ground and is used to protect the airbag assembly (2) when the airbag assembly (2) is in the folded storage state and to allow vehicles and pedestrians to pass.

5. The pre-embedded inflatable water-blocking airbag for the front end of a basement entrance according to claim 4, characterized in that, The top cover (4) is a rigid load-bearing cover plate, and the top cover (4) is removably placed above the pre-embedded foundation trench (103); The top cover (4) is lifted by the airbag body (201) when the airbag assembly (2) is inflated and deployed, and is re-covered on the pre-embedded base groove (103) after the airbag assembly (2) is depressurized, folded and retracted.

6. The pre-embedded inflatable water-blocking airbag for the front end of a basement entrance according to claim 1, characterized in that, The inflation device (3) includes an inflation body (301), an inflation pipeline (302), and a sensor assembly; One end of the inflation pipe (302) is connected to the air outlet of the inflation body (301), and the other end of the inflation pipe (302) is connected to the air inlet of the airbag body (201). The sensor assembly is installed on the side wall of the basement and is used to detect water level signals.

7. The pre-embedded inflatable water-blocking airbag for the front end of a basement entrance according to claim 6, characterized in that, The inflation device (3) also includes a control box, which is electrically connected to the sensor assembly and the inflation body (301) respectively; The control box is equipped with a remote communication module, which is used to receive external remote start commands. The control box is used to control the inflation body (301) to start inflation according to the water level signal of the sensor assembly or the remote start command.

8. The pre-embedded inflatable water-blocking airbag for the front end of a basement entrance according to claim 7, characterized in that, When the sensor assembly detects that the water level has reached a preset warning height, it generates a trigger signal and sends it to the control box. After receiving the trigger signal, the control box controls the inflation body (301) to start. The inflation body (301) quickly inflates the airbag body (201) through the inflation pipe (302), so that the airbag body (201) switches from the folded storage state to the rated inflation working state within a set time.

9. The pre-embedded inflatable water-blocking airbag for the front end of a basement entrance according to claim 1, characterized in that, The concave slide rail (101) extends horizontally at one end near the ground to form an extension. The extension is embedded below the ground to increase the contact area between the concave slide rail (101) and the ground and improve the bonding strength.

10. The pre-embedded inflatable water-blocking airbag for the front end of a basement entrance according to claim 1, characterized in that, The airbag body (201) is made of a high-strength flexible waterproof fabric, which is a polyester fiber fabric, nylon fiber fabric or aramid fiber fabric.

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