A protection device for urban waterlogging underground garage

Abstract

The utility model discloses a kind of protective devices of urban waterlogging underground garage, including the drainage groove being set to garage entrance and being close to entrance abrupt slope lower end, emergency protection system is set between the drainage groove and entrance abrupt slope;The emergency protection system includes a pit groove with the volume greater than the drainage groove, water storage bag is laid in pit groove, garage wall both ends are provided with guide slot, pit groove top and both sides garage wall guide slot are all arranged with restraint mechanism;When water storage bag is completely filled with water, restraint mechanism limits water storage bag to fill pit groove and garage entrance space above it completely.The utility model is compact in structure, responds quickly, and degree of automation is high, greatly improves the flood control capacity of underground garage.

Description

Technical Field

[0001] This utility model relates to the technical field of underground parking garage equipment, specifically to a protective device for underground parking garages in urban areas prone to flooding. Background Technology

[0002] As an indispensable component of modern buildings, underground parking garages' waterproofing and flood prevention capabilities directly impact the safety of vehicles, equipment, and the building's structure. In the context of frequent extreme rainstorms or urban flooding, the entrances to low-lying underground parking garages are highly susceptible to being the primary targets of rainwater runoff. Inadequate protection leading to backflow can not only cause significant property damage but also potentially trigger secondary disasters such as electrical leaks and collapses, posing extremely high safety risks.

[0003] Currently, the protective measures commonly used in the industry have significant performance bottlenecks. Firstly, passive conventional drainage ditches (troughs) are effective during normal rainfall, but when rainfall far exceeds the drainage system's capacity, they quickly become saturated and fail due to backflow from the municipal pipe network or the drainage rate not keeping pace with the runoff, leading to flooding. Secondly, active emergency flood barriers, such as detachable metal barriers or sandbags, while creating physical barriers, heavily rely on manual warnings and operations, resulting in slow response times and difficulty in rapid deployment during sudden downpours. Furthermore, the seals at the joints between the barriers and the ground or walls are often insufficient, leading to leaks. In addition, metal barriers are prone to corrosion and jamming during long-term storage, occupy space, and their reliability is difficult to guarantee.

[0004] The existing technological system has gaps in two key aspects: "automatic hazard detection" and "rapid proactive defense." Developing an emergency protection device that can be intelligently triggered, quickly activated, tightly sealed, and without affecting the internal environment of the garage is an urgent need to improve the disaster prevention and mitigation capabilities of underground spaces and has significant application value. Utility Model Content

[0005] To solve the above technical problems, this utility model provides a protective device for underground parking garages in urban areas prone to flooding.

[0006] The technical solution is as follows: A protective device for underground parking garages in urban areas prone to flooding, the key features of which are: a drainage ditch set at the entrance of the parking garage and near the lower end of the steep entrance slope, and an emergency protection system set between the drainage ditch and the steep entrance slope; the emergency protection system includes a pit with a volume larger than the drainage ditch, a water storage bag laid in the pit, guide grooves opened at both ends of the parking garage wall, and restraint mechanisms arranged above the guide grooves on both sides of the parking garage wall and the pit.

[0007] Once the water storage bag is fully filled with water, the restraint mechanism prevents the bag from filling the pit and the garage entrance space above it. This structure enables rapid and reliable water blocking in case of flooding, enhancing the disaster prevention and mitigation capabilities of underground garages, effectively preventing rainwater from continuing to overflow into the garage, and achieving an intelligent switch from passive drainage to active protection.

[0008] Preferably, the emergency protection system further includes a water pump, the inlet pipe of which extends into the pit; the outlet pipe of which is connected to the water storage bag.

[0009] With the above structure, the water pump directly draws rainwater from the pit and delivers it to the water storage bag, eliminating the need for an additional emergency water source and achieving efficient resource utilization through "flood control". The precise connection between the inlet and outlet pipes ensures a smooth water supply path, enabling the water storage bag to be filled quickly, shortening the time for the water barrier to form, and improving the response efficiency of emergency protection.

[0010] Preferably, the bottom of the pit is lower than the bottom of the drainage ditch, and a flood channel is connected between the pit and the drainage ditch, which is higher than the bottom of the drainage ditch.

[0011] A liquid level sensor is installed in the pit, and the liquid level sensor is lower than the flood channel.

[0012] The liquid level sensor transmits a flood signal to the processor, which in turn transmits a flood control signal to the drive mechanism, which then drives the water pump to operate.

[0013] With the above structure, the bottom of the pit is lower than the drainage channel, which allows the flood channel to divert rainwater in advance when the drainage channel is about to overflow, allowing preparation time for emergency protection. The liquid level sensor is installed below the flood channel, which can accurately capture the rainwater inflow signal. Through the linkage of the processor and the drive mechanism, the water pump can be started automatically without manual intervention, ensuring the timeliness and accuracy of the protection action.

[0014] As a preferred embodiment: the water storage bag is also connected to a tap water pipe via a solenoid valve, which is connected to the processor; the solenoid valve is also bypassed by a manual water valve.

[0015] The lower end of the water storage bag is also connected to a drain pipe that extends into the drainage tank. The drain pipe is equipped with a drain valve that is connected to the processor.

[0016] With the above structure, the solenoid valve is linked with the processor, which can automatically open the tap water pipe to replenish water when there is insufficient rainwater or when there is an early warning, ensuring that the water storage bag can fully expand to form an effective water barrier; the manual water valve serves as a backup plan to avoid water replenishment failure due to electronic component failure, thus improving system redundancy; the drain pipe is connected to the drainage trough, and with the automatic control of the drain valve, the water accumulated in the water storage bag can be quickly drained after a disaster, allowing the equipment to quickly return to standby mode, taking into account both emergency protection and subsequent reset convenience.

[0017] Preferably, the guide groove is formed inside the walls on both sides of the garage door opening, and has a vertical rectangular groove structure; its vertical length is consistent with the height of the garage door opening; the two sides of the water storage bag are correspondingly embedded in the guide groove, and can extend along the vertical direction of the guide groove.

[0018] With the above structure, the guide groove provides a stable vertical sliding trajectory for the water storage bag, ensuring that the water storage bag rises smoothly in the predetermined direction during the filling process, avoiding deviation or twisting.

[0019] Preferably, the constraint mechanism consists of a horizontal constraint railing and a vertical constraint railing, which are vertically connected to form a frame-type limiting structure.

[0020] The horizontal restraint railing is horizontally and fixedly installed on the top wall of the garage door opening above the pit, with a length consistent with the width of the pit.

[0021] The vertical constraint railing is fixedly installed on both sides of the guide groove, and its top end is perpendicularly connected to the end of the horizontal constraint railing.

[0022] Using the above structure, the frame-type limiting structure precisely controls the expansion range and shape of the water storage bag after it is filled with water, ensuring that the water storage bag fits perfectly with the outline of the garage door opening to form a regular water barrier; the horizontal and vertical restraint railings work together to prevent water leakage caused by excessive expansion of the bag or irregular shape, maximizing the water barrier area and protection effect.

[0023] Preferably, the liquid level sensor is fixedly embedded in the lower part of the side wall of the pit.

[0024] With the above structure, the liquid level sensor is installed directly below the flood channel, which can accurately monitor changes in the water level in the pit and promptly trigger the emergency protection system, avoiding false detections caused by water flow fluctuations or debris interference. Its position ensures that the emergency protection system is triggered in time when the water level in the drainage channel rises, providing a reliable signal basis for subsequent protection actions and improving the accuracy of hazard judgment.

[0025] Preferably, a grid plate covering the pit is provided in the middle of the pit, and the water storage bag is installed on the grid plate; a filter space with an independent cavity is formed at the bottom of the pit by the grid plate, and the water inlet pipe of the water pump extends into the filter space.

[0026] With the above structure, the grid separates the water storage bag from the filtration space, ensuring that the water storage bag works in a clean environment and preventing mud and debris from clogging the bag; the filtration space, as a pretreatment area, can settle and isolate impurities in rainwater, reducing the risk of clogging to the water pump and water storage bag, and improving the long-term stability and maintenance convenience of the system.

[0027] Preferably, the flood channel is connected to the filtration space, and a filter screen is installed inside the channel.

[0028] With the above structure, the filter screen is set at the entrance of the flood channel to effectively intercept mud, sand, leaves and other debris in the rainwater, preventing blockage of pipes and water pumps; the flood channel guides the filtered rainwater to the filtration space, providing a clean water source for the water pump, ensuring the stable operation of the water pump in emergency situations and extending the service life of the equipment.

[0029] Preferably, the emergency protection system further includes a hinge plate, wherein the hinge plate has the same size as the top opening of the pit; the hinge plate crosses horizontally over the top opening of the pit in the initial state, and the upper surface of the hinge plate is flush with the garage floor.

[0030] With the above structure, the hinge rod can completely cover the pit in the initial state, ensuring that the garage floor is flat and does not affect the normal passage of vehicles and people; the cross structure not only ensures the stability of the coverage, but also facilitates rapid deployment in emergencies, avoiding the cumbersome problem of opening conventional covers, and taking into account both the convenience of daily use and the speed of emergency response.

[0031] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model automatically triggers the emergency protection system by intelligently sensing changes in water level, thereby achieving the formation of a rapid and tightly sealed water barrier; the overall structure is compact, does not affect the daily use of the garage, and significantly improves the disaster prevention and mitigation capabilities of the underground garage, thus having high practicality and promotional value. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of this utility model;

[0033] Figure 2 for Figure 1 The left view;

[0034] Figure 3 A schematic diagram showing the working state of the water storage bag;

[0035] Figure 4 This is a flowchart illustrating the process of this utility model. Detailed Implementation

[0036] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0037] like Figure 1 , Figure 2 As shown, a protective device for an underground parking garage in an urban area prone to flooding includes a drainage ditch 1 located at the entrance of the garage and near the lower end of the steep entrance slope. An emergency protection system 2 is installed between the drainage ditch 1 and the steep entrance slope. The emergency protection system 2 includes a pit 4 with a volume larger than that of the drainage ditch 1. A water storage bag 7 is laid in the pit 4. Guide grooves 11 are opened at both ends of the garage wall. A restraint mechanism 9 is arranged above the guide grooves 11 on both sides of the garage wall and above the pit 4.

[0038] Once the water storage bag 7 is fully filled with water, the restraint mechanism 9 restricts the water storage bag 7 from filling the pit 4 and the garage entrance space above it.

[0039] Below the ground between the drainage ditch 1 and the steep inlet slope, an emergency protection system 2 is installed. The emergency protection system 2 is the core defense component in the event of flooding, used to form a closed water barrier to prevent rainwater backflow. The emergency protection system 2 includes a pit 4 with a volume larger than the drainage ditch 1, water storage bags 7 laid in the pit 4, guide channels 11 opened at both ends of the garage wall, a restraint mechanism 9 arranged above the pit 4 and in the guide channels 11, a traction mechanism 8 for pulling the water storage bags 7 up, a water pump 5 for transporting rainwater, a filter screen 12 and a filter space 14 for filtering impurities, a flood channel 15 for diverting rainwater, a liquid level sensor 3 for monitoring the water level, a cover plate 12 for protecting the sensor, and a hinge plate 10 for covering the pit 4. All components work together to achieve a full-process emergency protection of "sensing-diversion-filtration-bag filling-water blocking".

[0040] The drainage channel 1 is arranged laterally along the garage entrance and is used to collect and divert road runoff daily.

[0041] The pit 4 is located between the drainage ditch 1 and the steep slope at the garage entrance. It is formed by pre-embedding or on-site casting. The pit 4 is deeper and wider than the drainage ditch 1, allowing it to hold more rainwater and emergency components. A water storage bag 7 is installed inside the pit 4. In non-emergency situations, the water storage bag 7 is folded and completely contained within the pit 4, without occupying external space, ensuring a flat garage floor and normal vehicle passage. A liquid level sensor 3 is fixedly embedded in its side wall for real-time monitoring of the water level in the pit. The liquid level sensor 3 transmits a flood signal to the processor 6, which in turn transmits a flood control signal to the drive mechanism 61 via a relay. The drive mechanism 61 then drives the water pump 5 and the traction mechanism 8.

[0042] To proactively divert water before the drainage trough 1 overflows, a flood channel 15 is connected between the pit 4 and the drainage trough 1. The inlet of the flood channel 15 is located on the side wall of the drainage trough 1, and its height is higher than the bottom of the drainage trough 1. When the water level in the drainage trough 1 rises rapidly due to heavy rain and exceeds its normal drainage capacity, rainwater will overflow into the pit 4 area in advance through the flood channel 15, serving as an early warning and diversion function, and providing a backup water source for the water pump 5.

[0043] A partition plate 13 is installed in the middle of the pit 4, dividing the interior of the pit 4 into upper and lower cavities. The upper cavity accommodates the water storage bag 7, while the lower cavity forms an independent filtration space 14. The flood channel 15, located near the pit 4, leads directly to the filtration space 14. A filter screen 12 is installed in the flood channel 15 near the drainage trough 1. Before rainwater flows into the filtration space 14 through the flood channel 15, it undergoes preliminary filtration by the filter screen 12, intercepting larger debris such as mud, sand, and leaves to prevent them from entering the system and causing blockages.

[0044] A liquid level sensor 3 is arranged inside the pit 4. The liquid level sensor 3 is preferably fixedly embedded in the lower part of the side wall of the pit 4, and its installation height is lower than the outlet of the flood channel 15. This allows the liquid level sensor 3 to accurately sense the rainwater level flowing into the filtration space 14 from the flood channel 15.

[0045] The liquid level sensor 3 is electrically connected to a processor 6. When the liquid level sensor 3 detects that the water level has reached a preset danger threshold, it sends a flood signal to the processor 6. The processor 6 then performs a logical judgment and outputs a flood prevention signal to the drive mechanism 61, which then initiates subsequent protective actions.

[0046] The system's power source is rainwater, achieving "flood control through flooding." A water pump 5 is fixedly installed on the wall above the steep inlet slope. The inlet pipe of the water pump 5 extends into the lower part of the filtration space 14 of the pit 4 to draw rainwater that has undergone preliminary filtration. The outlet pipe of the water pump 5 is connected to the water storage bag 7. The water pump 5 is controlled by the drive mechanism 61 and automatically starts when a flood control signal is received, opening the pumping valve 51 in the pipe to pump the rainwater in the filtration space 14 into the water storage bag 7. To ensure that the water storage bag 7 can be effectively filled with water under various conditions, the water storage bag 7 is also connected to a tap water pipe via a solenoid valve 62. The solenoid valve 62 is also connected to the processor 6 and can be opened by the processor 6 to replenish water using tap water when there is insufficient rainwater or when the system issues an early warning. As a redundancy backup, a manual water valve 63 is also connected in parallel to the solenoid valve 62 for manual intervention in case of electrical failure.

[0047] A drain pipe 64 is connected to the lower end of the water storage bag 7, and the outlet of the drain pipe 64 leads to the drainage trough 1. A drain valve 65 is installed on the drain pipe 64, and the drain valve 65 is also connected to the processor 6. When the flooding emergency is resolved, the processor 6 can control the drain valve 65 to open, quickly draining the water in the water storage bag 7 into the drainage trough 1, thus resetting the system.

[0048] To guide the orderly unfolding of the water storage bag 7 in an emergency, symmetrical guide grooves 11 are provided inside the walls on both sides of the garage door opening. Each guide groove 11 is a vertical rectangular groove structure, with its vertical length matching the height of the garage door opening and its width matching the side thickness of the water storage bag 7 in its folded state. In the initial state, the two sides of the water storage bag 7 are embedded in the guide grooves 11 and can slide up and down along the vertical direction of the guide grooves 11 without jamming. A rubber sealing layer made of elastic rubber is also attached to the inner wall of the guide groove 11 to fill the gap between the sides of the water storage bag 7 and the inner wall of the guide groove 11, effectively preventing floodwater and rainwater from seeping in from the side and improving water-blocking sealing.

[0049] Restraint mechanisms 9 are arranged above the guide grooves 11 and pits 4 on both sides of the garage walls. Each restraint mechanism 9 consists of a horizontal restraint railing 91 and a vertical restraint railing 92, which are vertically connected to form a frame-type limiting structure. The horizontal restraint railing 91 is horizontally fixed to the wall above the entrance slope at the top of the pit 4, and its length is the same as the width of the pit 4, used to limit the excessive forward expansion of the water storage bag 7. The vertical restraint railing 92 is fixedly installed on both sides of the guide groove 11, and its top end is vertically connected to the end of the horizontal restraint railing 91. The constraint mechanism 9 is fixed by bolts or welding to ensure structural stability. At least three constraint rings are installed on both sides of the water storage bag 7, and these constraint rings are fitted onto the vertical constraint railing 91. When the water storage bag 7 is filled with water and expands, the constraint rings can effectively restrain the water storage bag 7 from sliding vertically within the guide groove 11. Velcro is provided at the upper end of the water storage bag 7, and similarly, Velcro is provided on the horizontal constraint railing 91. When the water storage bag 7 is filled with water and expands to the wall above the steep entrance slope, the Velcro on the water storage bag 7 adheres to the Velcro on the horizontal constraint railing 91. The function of this constraint mechanism 9 is to limit the expansion shape of the water storage bag 7 after it is filled with water. When the water storage bag 7 is fully filled with water, it ensures that it forms a regular water-retaining wall that fits tightly against the outline of the garage door opening, avoiding water leakage caused by disorderly expansion.

[0050] The emergency protection system also includes a traction mechanism 8 for pulling the water storage bag upward. The traction mechanism 8 includes a traction motor 81 and a traction rope 82. The traction motor 81 is fixedly installed on the wall above the steep entrance slope and is connected to the processor 6. One end of the traction rope 82 is connected to the output end of the traction motor 81, and the other end is fixedly connected to the top edge of the water storage bag 7.

[0051] Its function is to simultaneously pull the water storage bag 7 upward during water filling, guiding it to rise smoothly along the guide groove 11. When water is being filled into the water storage bag 7, the traction motor 81 starts simultaneously and pulls the water storage bag 7 upward at a uniform speed through the traction rope 82 until the top of the water storage bag 7 abuts against the horizontal restraint railing 91, completely blocking the garage entrance space and forming a closed water barrier.

[0052] To ensure the daily flatness and safe passage of the garage floor, the emergency protection system 2 also includes a hinge plate 10. The size of the hinge plate 10 is the same as the top opening size of the pit 4. In the initial state, the hinge plate 10 horizontally covers the opening of the pit 4, and its upper surface is flush with the garage floor, without affecting the normal passage of vehicles and people. When the water bag 7 begins to fill and expand, the upward lifting force generated at its bottom will lift the hinge plate 10, and the hinge plate 10 will then rotate and unfold to both sides around the bottom hinge axis, finally standing vertically on both sides of the water bag 7, providing additional support and impact resistance stability for its bottom.

[0053] like Figure 3 , Figure 4 As shown, under normal conditions, the drainage trough 1 is responsible for draining daily rainwater, and the hinge rod 10 crosses and covers the top of the pit 4 to keep the ground flat. The water storage bag 7 is folded and placed on the grid plate 13 inside the pit 4. The entire system is in standby monitoring mode. The drainage trough 1 is responsible for draining daily rainwater, and the liquid level sensor 3 continuously monitors the water level in the pit 4, but it has not reached the preset flood prevention activation threshold. The entire system does not affect the normal use of the garage.

[0054] When heavy rainfall or flooding occurs, the water level in the drainage ditch 1 rises rapidly and flows through the flood channel 15 into the filtration space 14 of the pit 4. The level sensor 3 monitors in real time that the water level exceeds the safety threshold and immediately sends a "flood signal" to the processor 6, which then simultaneously starts the water pump 5 and the traction motor 81.

[0055] The water pump 5 starts working, pumping the pre-stored, filtered rainwater in the filtration space 14 into the water storage bag 7.

[0056] The traction motor 81 of the traction mechanism 8 starts synchronously and pulls the top of the water storage bag 7 upward at a uniform speed by winding the traction rope 82.

[0057] Under the combined effects of water expansion and upward traction, the water storage bag 7 begins to expand, its bottom pushing open the cross-covered hinge plate 10, and its two side guide grooves 11 smoothly slide upward. Under the constraint of the restraint mechanism 9, the water storage bag 7 directionally fills the pit 4 and the garage entrance space above it until its top abuts against the horizontal restraint railing 91, fully unfolding and tightly fitting the outline of the doorway, forming a sealed water barrier from bottom to top, effectively preventing external rainwater from flowing back in.

[0058] If the rain continues, the high-level rainwater in the drainage ditch 1 will continue to be replenished to the filtration space 14 through the flood channel 15, providing a stable water source for the water pump 5 and maintaining the existence of the water barrier.

[0059] If the filtration space 14 is insufficient with rainwater, or if precautions need to be taken in advance based on warnings before heavy rain, the processor 6 can control the solenoid valve 62 to open, connecting to a tap water pipe to directly replenish water to the water storage bag 7, ensuring complete safety. A manual water valve serves as a final backup, allowing for manual intervention to replenish water if the automatic control system completely fails.

[0060] Once the flooding emergency has ended and the external water level has dropped to a safe level, the processor 6 controls the opening of the discharge valve.

[0061] The water stored in the water storage bag 7 is discharged into the drainage trough 1 through the drain pipe 64 under the action of gravity. As the water storage bag 7 empties and contracts, it falls back into the pit 4 under the action of gravity, restoring its folded state. The entire system returns to its initial standby state, ready to deal with the next emergency.

[0062] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0063] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0064] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0065] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A protective device for underground parking garages prone to urban flooding, characterized in that: The system includes a drainage ditch (1) located at the entrance of the garage and near the lower end of the entrance slope, and an emergency protection system (2) is provided between the drainage ditch (1) and the entrance slope. The emergency protection system (2) includes a pit (4) with a volume larger than that of the drainage ditch (1), a water storage bag (7) is laid in the pit (4), guide grooves (11) are opened at both ends of the garage wall, and restraint mechanisms (9) are arranged above the guide grooves (11) on both sides of the garage wall and above the pit (4). When the water storage bag (7) is fully filled with water, the restraint mechanism (9) restricts the water storage bag (7) from filling the pit (4) and the garage entrance space above it.

2. The protective device for underground parking garages in urban areas prone to flooding according to claim 1, characterized in that: The emergency protection system (2) also includes a water pump (5), the inlet pipe of which extends into the pit (4); the outlet pipe of the water pump (5) is connected to the water storage bag (7).

3. The protective device for underground parking garages in urban areas prone to flooding according to claim 2, characterized in that: The bottom of the pit (4) is lower than the bottom of the drainage trough (1), and a flood channel (15) is connected between the pit (4) and the drainage trough (1), which is higher than the bottom of the drainage trough (1). A liquid level sensor (3) is arranged in the pit (4), and the liquid level sensor (3) is lower than the flood channel (15). The liquid level sensor (3) transmits a flood signal to the processor (6), which in turn transmits a flood control signal to the drive mechanism (61), which drives the water pump (5) to operate.

4. The protective device for an underground parking garage in an urban flooded area according to claim 3, characterized in that: The water storage bag (7) is also connected to a tap water pipe via a solenoid valve (62), which is connected to the processor (6); the solenoid valve (62) is also connected to a manual water valve (63). The lower end of the water storage bag (7) is also connected to a drain pipe (64), which extends into the drainage tank (1). The drain pipe (64) is equipped with a drain valve (65), which is connected to the processor (6).

5. A protective device for underground parking garages in urban areas prone to flooding, as described in claim 1, characterized in that: The guide groove (11) is located inside the walls on both sides of the garage door opening and has a vertical rectangular groove structure. Its vertical length is consistent with the height of the garage door opening. The two sides of the water storage bag (7) are embedded in the guide groove (11) and can extend along the vertical direction of the guide groove (11).

6. A protective device for underground parking garages in urban areas prone to flooding, as described in claim 1, characterized in that: The constraint mechanism (9) consists of a horizontal constraint railing (91) and a vertical constraint railing (92), which are vertically connected to form a frame-type limiting structure; The horizontal restraint railing (91) is horizontally fixedly installed on the top wall of the garage door opening above the pit (4), and its length is consistent with the width of the pit (4); The vertical restraint railing (92) is fixedly installed on both sides of the guide groove (11), and its top end is vertically connected to the end of the horizontal restraint railing (91).

7. A protective device for underground parking garages in urban areas prone to flooding, as described in claim 3, characterized in that: The liquid level sensor (3) is fixedly embedded in the lower part of the side wall of the pit.

8. A protective device for underground parking garages in urban areas prone to flooding, as described in claim 3, characterized in that: A grid plate (13) covering the pit (4) is provided in the middle of the pit (4), and the water storage bag (7) is placed on the grid plate (13); a filter space (14) with an independent cavity is formed at the bottom of the pit (4) by the grid plate (13), and the water inlet pipe of the water pump (5) extends into the filter space (14).

9. A protective device for underground parking garages in urban areas prone to flooding, as described in claim 8, characterized in that: The flood channel (15) is connected to the filtration space (14), and a filter screen (12) is installed in the channel.

10. A protective device for underground parking garages in urban areas prone to flooding, as described in claim 1, characterized in that: The emergency protection system (2) also includes a hinge plate (10), wherein the hinge plate (10) has the same top opening size as the pit (4); the hinge plate (10) crosses and horizontally covers the opening of the pit (4) in the initial state, and the upper surface of all the hinge plates (10) is flush with the garage floor.

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