Intelligent perception water quantity and automatic lifting garage flood prevention device

Abstract

The application discloses an intelligent perception water quantity and automatic lifting garage flood control device, relates to the technical field of disaster prevention and mitigation, and comprises a mounting base serving as the basis of the whole flood control device, which is provided with a receiving groove for storing a water blocking soft plate and a lifting assembly, and an extension groove and an extension box for mounting a sensing assembly. Through the lifting assembly and the sensing assembly, when a flood disaster and heavy rain occur, the buoyant ball starts to rise under the buoyant force of water, the motor is powered, the lifting plate drives the water blocking soft plate to continuously rise along with the continuous rise of the water level, when the water level gradually drops from a certain height, the buoyant ball drops due to gravity, the motor drives the water blocking soft plate to vertically drop, the flood control device has high automation, manual operation is not needed, the water level change is automatically sensed and flood control measures are started, the flood control device occupies small space and is suitable for being installed in limited space such as a garage.

Description

Technical Field

[0001] This invention relates to the field of disaster prevention and mitigation technology, and in particular to a smart water volume sensing and automatic lifting garage flood control device. Background Technology

[0002] Due to the disadvantages of underground parking garages being located in low-lying areas and having slow drainage, in recent years, during the annual flood season, heavy rains have frequently caused the underground drainage system to become overloaded, resulting in flooding of underground parking garages, causing property damage and personal injury.

[0003] Existing flood control facilities in underground parking garages mostly consist of sandbags and flood barriers. However, in practical applications, these sandbags and flood barriers have the following problems: 1. Inconvenient and time-consuming manual operation: Placing sandbags and erecting barriers requires manual operation, which is relatively cumbersome and time-consuming. Regular inspection and maintenance are also necessary, and in emergencies, there may not be enough time to operate. 2. Difficult storage and cleaning: Sandbags require a large amount of space to be stacked, and mud and moisture may remain between the sandbags. A large number of sandbags will generate a certain amount of waste, which needs to be properly disposed of, otherwise it may cause environmental pollution. 3. Limited protective effect: Sandbags and barriers can usually only remain stable under a certain water pressure. If the flood pressure exceeds their bearing capacity, they may break or fail, causing floodwater to enter the parking garage. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, the purpose of this invention is to provide a lifting assembly and a sensing assembly that automatically rises with the water level, solving the problem that the operation of flood control sandbags and flood control barriers is time-consuming and may not be feasible in emergency situations.

[0005] To address the problems of existing technologies, the technical solution of this invention is as follows: A smart water volume sensing and automatic lifting garage flood control device includes a mounting base, which serves as the foundation of the entire flood control device. The base is provided with a storage slot for storing a water-blocking flexible plate and a lifting assembly, as well as an extension slot and an extension box for installing a sensing assembly. The water-blocking flexible plate is fixed in the storage slot and connected by a lifting plate. When a flood occurs, it can be raised to block the water flow. The lifting plate is connected to the water-blocking flexible plate and moves up and down through the lifting assembly.

[0006] Preferably, the lifting assembly includes a motor, which is fixed in the storage slot to provide power for the entire lifting process. The bidirectional threaded rod is driven to rotate by the motor and drives the moving block to move through the threaded connection. The moving block is threadedly connected to the bidirectional threaded rod and connected to the lifting rod through the bottom rotating shaft.

[0007] Preferably, multiple lifting rods are rotatably connected to each other to form a telescopic structure, which rises and falls with the movement of the moving block. The sliding block is connected to the lifting rods through the top rotating shaft, and the limiting block is slidably connected to the limiting groove on the lifting plate to ensure that the lifting plate rises and falls smoothly.

[0008] Preferably, the sensing component includes a vertical rod fixed in the extension box and extension slot, serving as a sliding track for the buoyancy ball, which rises with the water level and triggers a switch via a connected first and second lever.

[0009] Preferably, the first and second paddles are designed to be tilted upwards and downwards respectively, matching the shapes of the first switch (tilted downwards) and the second switch (tilted upwards). When the buoyancy ball rises to a certain height, the paddles will trigger the corresponding switches.

[0010] Preferably, the rubber sheet is wound on a winding shaft, which is rotatably connected to a storage groove. A pressing wheel that presses against one side of the rubber sheet is rotatably connected to the storage groove. Hooks that abut against the sides of the pressing wheel are fixedly connected to both ends of the reinforcing rib. One end of a baffle is rotatably connected to the storage groove, and the other end of the baffle is rotatably connected to the pressing shaft. The pressing shaft is in contact with the rubber sheet, and the bottom side of the baffle is connected to the storage groove by a spring.

[0011] Preferably, the upper front side of the storage tank is connected to the water inlet, the lower rear side is connected to the water outlet, and a water wheel is rotatably connected inside the storage tank. The water wheel is connected to the buoyancy ball via a transmission.

[0012] Preferably, an eccentric shaft is connected to one side of the water wheel, the eccentric shaft is rotatably connected to a connecting rod, the connecting rod is rotatably connected to the piston inside the piston pump, a suction pipe is connected to the side of the piston pump, the suction pipe is connected to a one-way inlet valve, and the top of the piston pump is inserted into a float fixed at the bottom of the buoyancy ball.

[0013] Compared with the prior art, the advantages of the present invention are as follows:

[0014] This invention, by incorporating a lifting and sensing component, allows the buoyancy ball to rise during floods and heavy rains. This rise powers a motor, which in turn moves a lifting plate upwards, extending a water-blocking flexible plate. As the water level rises, the lifting plate continues to elevate the water-blocking flexible plate. When the water level gradually drops, the buoyancy ball descends due to gravity, and the motor causes the water-blocking flexible plate to descend vertically. This results in a highly automated flood control device that requires no manual operation, automatically senses water level changes, and activates flood control measures. The ingenious design of each component minimizes space requirements, making it suitable for installation in confined spaces such as garages.

[0015] This invention features a lifting assembly with an underground mounting base. When the flood control function is not in use, the lifting rods fold and retract into a storage slot, with the top of the lifting plate parallel to the ground. The water-blocking soft plate is stored inside the storage slot to reduce space occupation, prevent wear from passing vehicle wheels, and avoid deformation and damage. It also does not affect vehicle access.

[0016] This invention incorporates a sensing component. When there is a certain depth of water on the ground, the buoyancy ball rises due to the buoyancy of the water. The height of the buoyancy ball is determined by the water flow rate. When the water flow rate is high, the water wheel rotates, driving the piston pump to operate, filling the piston pump with water. Under pressure, the buoyancy ball rises and triggers a switch to automatically block the water.

[0017] The water-blocking flexible plate of this invention is a rubber plate with a linear array of reinforcing ribs inside, which improves the strength of the water-blocking flexible plate. The water-blocking flexible plate can be rolled up, reducing the space occupied. The groove for the pre-embedded mounting base does not need to be too deep. The two ends of the reinforcing ribs have hooks that cooperate with the clamping wheel, which keep the water-blocking flexible plate stable under water pressure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the extension groove of the present invention.

[0020] Figure 3 This is a schematic diagram of the lifting plate of the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of the movable block of the present invention.

[0022] Figure 5 This is a schematic diagram of the sliding block of the present invention.

[0023] Figure 6 This is a schematic diagram of the structure of the buoyancy ball of the present invention.

[0024] Figure 7 This is a side view of the extension box in Embodiment 3 of the present invention.

[0025] Figure 8 This is a partial structural diagram of the extension box in Embodiment 3 of the present invention.

[0026] In the attached diagram, the following are the reference numerals: 1. Mounting base; 2. Storage slot; 3. Water-blocking flexible plate; 301. Rubber plate; 302. Reinforcing rib; 303. Hook rod; 4. Lifting plate; 5. Extension slot; 6. Extension box; 601. Water inlet; 602. Drain outlet; 7. Motor; 8. Two-way threaded rod; 9. Moving block; 10. Bottom rotating shaft; 11. Lifting rod; 12. Top rotating shaft; 13. Sliding block; 14. Limiting block; 15. Limiting slot; 16. Vertical rod; 17. Buoyancy ball; 1701. Float; 1702. Water suction pipe; 18. First paddle; 19. Second paddle; 20. First switch; 21. Second switch; 22. Baffle; 2201. Pressing shaft; 2202. Spring; 23. Pressing wheel; 24. Water wheel; 25. Connecting rod; 26. Piston rod; 27. Piston pump. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Example 1

[0029] Please see Figure 1-3 A smart water volume sensing and automatic lifting garage flood control device includes a mounting base 1. The mounting base 1 is firmly installed underground at the garage entrance or in the area requiring flood control by anchor bolts or other fixing methods. It serves as the foundation of the entire flood control device, bearing the weight of all components such as the water-blocking soft plate 3, the lifting plate 4, the lifting assembly, and the sensing assembly. The mounting base 1 has a storage slot 2 inside, which is used to store the water-blocking soft plate 3 when the flood control function is not in use, so as to reduce space occupation. It is also used to install the lifting assembly. At the same time, it also has an extension slot 5 and an extension box 6 for installing the sensing assembly, ensuring that the components can be arranged in an orderly manner and work together. The water-blocking soft plate 3 and the lifting plate 4 will block the opening at the top of the storage slot 2 to prevent water from entering the storage slot 2.

[0030] Please see Figure 1-3 The water-blocking flexible panel 3 is made of flexible materials, such as rubber or polymer composite materials. When a flood comes, the water-blocking flexible panel 3 is lifted and unfolded from the storage tank 2 by the lifting component to form a barrier to prevent floodwater from entering the garage. The water-blocking flexible panel 3 has a certain degree of flexibility and elasticity, and can adapt to garage entrances of different shapes and slopes, ensuring flood prevention while reducing the impact on vehicle entry and exit.

[0031] Please see Figure 1-3 The lifting plate 4 is fixedly connected to the water-blocking flexible plate 3. It moves up and down via components such as the lifting rod 11 and sliding block 13 in the lifting assembly. When the motor 7 starts, it drives the lifting rod 11 up and down through the transmission mechanism, thereby driving the lifting plate 4 to rise and fall. The lifting plate 4 is equipped with structures such as a limit block 14 and a limit groove 15, which work in conjunction with the sliding block 13 to ensure stability during lifting and preventing swaying or displacement from affecting the flood control effect. By setting up the lifting assembly and sensing assembly, in the event of floods or heavy rain, the buoyancy ball 17 is affected by water... After gaining buoyancy, the device begins to rise, supplying power to motor 7. Motor 7 then drives the lifting plate 4 upward, which in turn stretches the water-blocking flexible plate 3. As the water level continues to rise, the lifting plate 4 drives the water-blocking flexible plate 3 to rise continuously. When the water level gradually drops from a certain height, the buoyancy ball 17 descends due to gravity, and motor 7 drives the water-blocking flexible plate 3 to descend vertically. This makes the flood control device highly automated, requiring no manual operation. It automatically senses changes in water level and activates flood control measures. Each component is ingeniously designed, occupies little space, and is suitable for installation in limited spaces such as garages.

[0032] Please see Figure 2-5 The lifting assembly uses motor 7 as its power source. Motor 7 is a three-phase asynchronous motor, powered by either a power line connected to the grid or a backup power supply. When the sensing component detects that the flood level has reached a preset height, the control system sends a start signal to motor 7, causing it to rotate. Motor 7 drives the bidirectional threaded rod 8 to rotate via a reducer or coupling. The bidirectional threaded rod 8 has multiple sets of threads in opposite directions. Each set of threads in opposite directions can drive a corresponding set of moving blocks 9 to move simultaneously in opposite directions. The threads on the bidirectional threaded rod 8 match the threads in the moving blocks 9, enabling the moving blocks to move in opposite directions. Block 9 moves axially under the rotation of the threaded rod. The movement of block 9 is transmitted to the lifting rod 11 through components such as the bottom rotating shaft 10 and the top rotating shaft 12. The lifting rod 11 then drives the sliding block 13 and the lifting plate 4 to move up and down. By setting up the lifting assembly, the mounting base 1 is installed underground. When the flood prevention function is not used, the lifting rod 11 is folded and retracted into the storage groove 2. The top of the lifting plate 4 is parallel to the ground. The water-blocking soft plate 3 is stored inside the storage groove 2 to reduce space occupation, avoid wear from the wheels of passing vehicles, and is not easy to deform or break. It will not affect the entry and exit of vehicles.

[0033] Example 2

[0034] Please see Figure 1-6A smart water level sensing and automatic lifting garage flood control device, based on Embodiment 1, includes a sensing component. A buoyancy ball 17 floats as the water level rises or falls. The buoyancy ball 17 is filled with a material less dense than water (such as foam) to allow it to float on the water surface. The buoyancy ball 17 can only move vertically along the vertical rod 16 and will not rotate. The friction between the buoyancy ball 17 and the vertical rod 16 is less than the weight of the buoyancy ball 17. The buoyancy ball 17 is equipped with a first deflector 18 and a second deflector 19. When the floodwater level reaches a preset height, the buoyancy ball 17 floats up and causes the first deflector 18 to contact the first switch 20. When switch 20 is pressed, it sends a start signal to motor 7, driving the lifting assembly and the water-blocking flexible plate 3 to prevent floodwater from entering the garage. When not pressed, it cuts off power, similar to a push-button spring switch in the prior art. Simultaneously, motor 7 can work with an encoder to prevent the water level from stopping when both switches 20 and 21 are under continuous pressure. With the encoder, even if switches 21 and 21 are under continuous pressure, motor 7 will stop rotating after a few seconds, preventing flooding during low water levels. The water-blocking flexible plate 3 continues to rise. The first deflector 18 and the second deflector 19 on both sides of the buoyancy ball 17 are shaped to bend upwards and downwards, respectively. The contacts of the first switch 20 and the second switch 21 are shaped to bend downwards and upwards, respectively. This design ensures that when the buoyancy ball 17 rises, the first deflector 18 will exert a large force on the first switch 20. At this time, the contact part between the second deflector 19 and the second switch 21 has a certain curvature, so the second switch 21 will only be subjected to a small force and will not trigger the switch. Similarly, when the buoyancy ball 17 descends, the second deflector 19 and the second switch 21 operate on the same principle. By setting up a sensing component, when there is a certain depth of water on the ground, the buoyancy ball 17 begins to rise after being buoyed by the water. When the water level gradually drops from a certain height, the buoyancy ball 17 descends due to the principle of gravity. This enables automatic control of the flood control device, which is easy to operate and has high water-blocking efficiency. It can respond quickly and effectively prevent floodwater from entering the garage when a flood comes, ensuring the safety of vehicles and property in the garage.

[0035] In use, during floods and heavy rains, the ground will accumulate water to a certain depth. The water will enter the extension trough 5, and the buoyancy ball 17 will rise due to the buoyancy of the water. As the buoyancy ball 17 rises, the first lever 18 on the outside of the buoyancy ball 17 will activate the bent first switch 20 during the upward movement. The first lever 18 will contact the first switch 20. The motor 7 will not supply power until the first switch 20 is subjected to a certain force. Since the motor 7 is electrically connected to the first switch 20 and the second switch 21 through wires, the motor 7 will drive the bidirectional threaded rod 8 to rotate clockwise. The bidirectional threaded rod 8 will drive the two moving blocks 9 on the upper pair to move towards each other. There are multiple pairs of moving blocks 9 on the bidirectional threaded rod 8. The moving blocks 9 will drive the bottom rotating shaft 10 to move. The bottom rotating shaft 10 will drive the lifting rod 11 to rotate, causing the multiple lifting rods 11 to rotate relative to each other. The lifting rod 11 will drive the lifting plate 4 to move upward, and at the same time, the uppermost... The lifting rod 11 drives the top rotating shaft 12 to move, and the top rotating shaft 12 drives a pair of sliding blocks 13 to move towards each other. The sliding blocks 13 drive the limiting block 14 to slide along the inner wall of the limiting groove 15. The lifting plate 4 stretches the water-blocking soft plate 3. The height of the lifting plate 4 is always higher than the height of the buoyancy ball 17. As the water level rises, the first deflector 18 will squeeze different first switches 20, so that as the water level rises, the lifting plate 4 will drive the water-blocking soft plate 3 to rise continuously, thereby achieving the function of automatic rise for flood prevention. When the water level gradually drops from a certain height, the buoyancy ball 17 drops due to the principle of gravity. During the descent of the buoyancy ball 17, the second deflector 19 on the inner side of the buoyancy ball 17 will push down to squeeze the first switch 20. At this time, the motor 7 will drive the bidirectional threaded rod 8 to rotate counterclockwise, so that the lifting plate 4 drives the water-blocking soft plate 3 to descend vertically. As the water level drops continuously, the height of the water-blocking soft plate 3 can continuously decrease, realizing automatic descent.

[0036] Example 3

[0037] Please see Figure 1-8 An intelligent water volume sensing and automatic lifting garage flood control device, based on embodiment 1, wherein the water-blocking soft plate 3 is a rubber plate 301, and the rubber plate 301 is fixedly connected with a linear array of reinforcing ribs 302 to increase the strength of the rubber plate 301, so as to avoid the rubber plate 301 being deformed by water pressure when blocking water and thus failing to block effectively. A pressure wheel 23 is provided in the extension groove 5 so that one side of the rubber plate 301 is kept in contact with the inner wall of the extension groove 5 during the process of rising with the lifting plate 4. The two ends of the reinforcing ribs 302 are fixedly connected to hook rods 303, which hook to one side of the pressure wheel 23 to apply a local lateral tension to the rubber plate 301, so that the rubber plate 301 has a certain lateral strength to resist flooding. The rubber plate 301 is wound on a winding shaft, which is rotatably connected in the storage groove 2. One end of the winding shaft is driven by a bidirectional threaded rod 8.

[0038] When the motor 7 is running, the lifting plate 4 slides upward under the action of the lifting rod 11. The water-blocking flexible plate 3 connected to the bottom of the lifting plate moves upward accordingly. The wound water-blocking flexible plate 3 gradually moves upward. As the lifting plate 4 moves upward, the originally closed storage groove 2 opens. A rotatably connected baffle 22 is set in the storage groove 2. The lower side of the baffle 22 is connected to the inner wall of the storage groove 2 through the spring 2202, so that the baffle 22 has a downward rotation tendency. Thus, as the water-blocking flexible plate 3 gradually moves upward and the water-blocking flexible plate 3 on the winding shaft gradually becomes thinner, one end of the baffle 22 connected to the pressing shaft 2201 always abuts against the water-blocking flexible plate 3, keeping the storage groove 2 closed. After the water-blocking flexible plate 3 moves upward a certain length, the reinforcing rib 302 is at the horizontal position of the pressing wheel 23. The hook 303 hooks into the inner side of the pressing wheel 23 to prevent the reinforcing rib 302 from deforming from the middle due to water pressure and causing water leakage.

[0039] The extension trough 5 has an inlet 601 at the front and an outlet 602 at the rear. When there is water, it enters the extension trough 5 through the inlet 601 and is discharged through the outlet 602 below the water wheel 24. The water wheel 24 is stationary. When the water volume is large, the inflow of water into the extension trough 5 is greater than the outflow, and the water flow will drive the water wheel 24 to rotate. An eccentric shaft is connected to the side of the water wheel 24. The eccentric shaft is rotatably connected to the bottom of the connecting rod 25. The top of the connecting rod 25 is rotatably connected to the piston rod 26. The piston rod 26 slides in the piston pump 27. The side of the piston pump 27 is connected to a suction pipe 1702 that connects to the bottom of the extension trough 5. When the piston pump 27 is running, water enters the piston pump 27 through the suction pipe 1702. A float 1701 is inserted into the top of the piston pump 27. The float 1701 is fixedly connected to the buoyancy ball 17, so the buoyancy ball 17 can be triggered to move upward. The water-blocking soft plate 3 is raised according to the water flow rate for flood control.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smart perception water quantity and automatic lifting garage flood control device, comprising a mounting base (1), characterized in that: The outer wall of the mounting base (1) is provided with a receiving groove (2), the inner wall of the receiving groove (2) is fixedly connected with a water-blocking soft plate (3), the top of the water-blocking soft plate (3) is fixedly connected with a lifting plate (4), the outer wall of the mounting base (1) is provided with an extension groove (5), the top of the mounting base (1) is fixedly connected with an extension box (6), and the two ends of the lifting plate (4) are slidably connected with the inner side of the extension box (6). The lifting assembly is used for driving the lifting plate (4) to lift and block water, and the lifting assembly is connected with the receiving groove (2) and the lifting plate (4) respectively. The induction assembly is used for driving the lifting assembly to automatically open and close, and the induction assembly is connected with the extension groove (5) and the extension box (6) respectively. The lifting assembly comprises a motor (7) fixedly connected with the inner wall of the receiving groove (2), a double-threaded rod (8) fixedly connected with the output shaft of the motor (7) through a shaft coupling, and one end of the double-threaded rod (8) is rotatably connected with the inner wall of the receiving groove (2). The outer wall of the double-threaded rod (8) is threadedly connected with a moving block (9), and the outer wall of the moving block (9) is rotatably connected with a bottom rotating shaft (10). The outer wall of the bottom rotating shaft (10) is fixedly connected with a lifting rod (11), and the lifting rod (11) has a plurality of lifting rods (11) and is rotatably connected between two lifting rods (11). The top end of the lifting rod (11) is fixedly connected with a top rotating shaft (12), and the outer wall of the top rotating shaft (12) is rotatably connected with a sliding block (13). The induction assembly comprises a vertical rod (16) fixedly connected with the top of the inner cavity of the extension box (6) and the bottom of the inner cavity of the extension groove (5), and a buoyancy ball (17) slidably connected with the outer wall of the vertical rod (16). The front end of the receiving groove (2) is connected with a water inlet (601) on the upper side, and the rear end is connected with a water outlet on the lower side, the receiving groove (2) is rotatably connected with a water wheel (24), and the water wheel (24) is in transmission connection with the buoyancy ball (17).

2. The intelligent perception water quantity and automatic lifting garage flood prevention device according to claim 1, characterized in that: The top of the sliding block (13) is fixedly connected with a limiting block (14), the outer wall of the limiting block (14) is slidably connected with the inner wall of the limiting groove (15), and the outer wall of the limiting block (14) is slidably connected with the inner wall of the limiting groove (15).

3. The intelligent perception water quantity and automatic lifting garage flood prevention device according to claim 1, characterized in that: The outer side of the buoyancy ball (17) is fixedly connected with a first tab (18), and the inner side of the buoyancy ball (17) is fixedly connected with a second tab (19).

4. The intelligent perception water quantity and automatic lifting garage flood prevention device according to claim 3, characterized in that: The outer side of the inner wall of the extension box (6) and the extension groove (5) is fixedly connected with a first switch (20), and the inner side of the inner wall of the extension box (6) and the extension groove (5) is fixedly connected with a second switch (21).

5. The intelligent perception water quantity and automatic lifting garage flood prevention device according to claim 4, characterized in that: The shapes of the first tab (18) and the second tab (19) are upward and downward respectively, and the shapes of the first switch (20) and the second switch (21) are downward and upward respectively.

6. The intelligent perception water quantity and automatic lifting garage flood prevention device according to claim 1, characterized in that: The water-blocking soft plate (3) comprises a rubber plate (301), a linear array of reinforcing rib rods (302) is fixedly arranged in the rubber plate (301), and the reinforcing rib rods (302) are arranged horizontally.

7. The intelligent perception water quantity and automatic lifting garage flood prevention device according to claim 6, characterized in that: The rubber plate (301) is wound on a winding shaft, the winding shaft is rotationally connected in a receiving groove (2), a pressing wheel (23) is rotationally connected in the receiving groove (2) and is pressed on one side of the rubber plate (301), and the reinforcing rib rod (302) is fixedly connected with a hook rod (303) which is in contact with the side of the pressing wheel (23).

8. The intelligent perception water quantity and automatic lifting garage flood prevention device according to claim 7, characterized in that: One end of the baffle (22) is rotationally connected in the receiving groove (2), the other end of the baffle (22) is rotationally connected with a pressing shaft (2201), the pressing shaft (2201) is in contact with the rubber plate (301), and the bottom side of the baffle (22) is connected with the receiving groove (2) through a spring (2202).

9. The intelligent perception water quantity and automatic lifting garage flood prevention device according to claim 1, characterized in that: One side of the water wheel (24) is connected with an eccentric shaft, the eccentric shaft is rotationally connected with a connecting rod (25), the connecting rod (25) is rotationally connected with a piston in a piston pump (27), the side of the piston pump (27) is connected with a water suction pipe (1702), the water suction pipe (1702) is connected with a one-way water inlet valve, and the top of the piston pump (27) is inserted with a float (1701) which is fixedly connected with the bottom of a buoyancy ball (17).

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