Urban flood control early warning system and method

Abstract

The application discloses a kind of urban flood control early warning system and method, including water level sensor, setting in sewer pipe, for monitoring the water level state in sewer pipe;Communication module is connected with water level sensor, for sending the water level state monitored by water level sensor to main control module;Blocking cover plate, blocking cover plate is set in low-lying place entrance position, blocking cover plate can overturn and block low-lying place entrance;Blocking cover plate drive assembly is used to drive blocking cover plate overturn, and block low-lying place entrance;Main control module is used to receive water level state, control blocking cover plate drive assembly action, and output alarm state.The urban flood control early warning system provided by the application can detect the water level of each relevant area in real time, to judge the influence of current water level on garage and the like low-lying place;And by setting automatic blocking cover plate, so as to realize automatic blocking garage and the like low-lying place under specific conditions, can effectively prevent rainwater from pouring back in garage and the like low-lying area.

Description

Technical Field

[0001] This invention relates to the field of flood early warning technology, and in particular to an urban flood early warning system and method. Background Technology

[0002] With the intensification of climate change and the increasing frequency of extreme weather events, floods not only cause huge economic losses to cities but also seriously threaten the safety of urban residents. In order to mitigate the impact of floods on cities, it is necessary to conduct flood control and drainage risk prediction to reduce the losses they cause.

[0003] When cities experience flooding, rainwater cannot drain properly and tends to backflow into low-lying areas, especially garages and other low-lying locations. If this backflow occurs, vehicles can be submerged, resulting in significant economic and property damage. Therefore, it is crucial to assess the potential for backflow into garages and other low-lying areas during flooding and to take appropriate measures to contain it. However, currently, this assessment relies primarily on manual intervention. If the floodwaters are low and containment is implemented prematurely, it can cause inconvenience. Conversely, if the floodwaters are too high and garages and other low-lying areas are not contained in time, backflow may occur, leading to further property damage. Summary of the Invention

[0004] In order to accurately assess the impact of flooding on low-lying areas such as garages and take timely action, this invention provides an urban flood early warning system and method.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An urban flood warning system includes:

[0007] A water level sensor is installed inside the sewer pipe to monitor the water level within the pipe.

[0008] The communication module, connected to the water level sensor, is used to send the water level status monitored by the water level sensor to the main control module;

[0009] A sealing cover is provided at the entrance of a low-lying area, and the sealing cover can be flipped to seal the entrance of the low-lying area;

[0010] The sealing cover drive assembly is used to drive the sealing cover to flip and seal the entrance in the low-lying area;

[0011] The main control module is used to receive water level status, control the action of the sealing cover drive component, and output alarm status.

[0012] As a preferred embodiment of the present invention, the water level sensor is provided in three sets: the first set of water level sensors is installed inside the sewer pipe to monitor the water level in the sewer pipe; the second set of water level sensors is installed at the outlet of the sewer pipe to monitor the water level in the river at the outlet; and the third set of water level sensors is installed at the inlet of the low-lying area to monitor the water level at the inlet of the low-lying area.

[0013] As a preferred embodiment of the present invention, it also includes a passive sealing cover driving component, which automatically drives the sealing cover plate to flip and seal the inlet at the low-lying area when the inlet reaches a set water level.

[0014] As a preferred embodiment of the present invention, the sealing cover plate driving assembly includes:

[0015] A gas spring, one end of which is hinged to the cover plate and the other end is hinged to the mounting bracket at the entrance of the depression.

[0016] Rollers are mounted on the back of the sealing cover via support rods;

[0017] A guide rod is mounted on a mounting bracket, and the length direction of the guide rod is parallel to the hinge axis of the sealing cover plate;

[0018] A sleeve is fitted onto a guide rod and can move along the length of the guide rod. One end of the sleeve along its own length is fixedly connected to a hook for engaging a roller, and the hook and the sleeve form a receiving groove for accommodating the roller. The other end of the sleeve along its own axial direction is fixedly connected to an inclined push plate, and the receiving groove is set facing the inclined surface of the inclined push plate. The side of the inclined push plate away from the hook is inclined towards the side away from the sleeve.

[0019] A tension spring, one end of which is connected to a guide rod and the other end of which is connected to a sleeve, the tension spring being able to pull the sleeve to move on the guide rod;

[0020] A limiting plate is provided on the guide rod to limit the position of the sleeve on the guide rod;

[0021] The sleeve drive mechanism can drive the sleeve to move along the length of the guide rod.

[0022] As a preferred embodiment of the present invention, the passive sealing cap drive assembly includes a first pulley, a second pulley, a third pulley, and a fourth pulley fixedly connected to the mounting bracket; a first synchronous belt is wound between the first pulley and the second pulley, and a second synchronous belt is wound between the third pulley and the fourth pulley; the second pulley and the third pulley are coaxially fixedly connected, a connecting rod is fixedly connected to the first pulley, and a float plate is movably connected to the end of the connecting rod away from the first pulley. The float plate can rise and fall under the buoyancy of the water, thereby driving the first pulley to rotate; a first push plate is fixedly connected to the second synchronous belt, and the first push plate can push the sleeve toward the limiting plate near the hook under the drive of the second synchronous belt.

[0023] As a preferred embodiment of the present invention, the sleeve driving mechanism includes two control rods slidably mounted on the mounting frame. The sliding direction of the control rods is parallel to their own axial direction and parallel to the length direction of the guide rod. Each control rod is fixedly connected to a push plate for pushing the sleeve to move. A gear is rotatably connected between the two control rods. The two control rods are symmetrically arranged about the center of the gear. A rack that meshes with the gear is fixedly connected to the opposite surface of each control rod. A power source for driving one of the control rods to slide is also provided on the mounting frame.

[0024] The present invention also discloses a control method for the above-mentioned urban flood warning system, comprising the following steps:

[0025] The water level sensor detects the water level in the sewer pipe and sends the data to the main control module.

[0026] The main control module receives the water level signal from the water level sensor. When the water level exceeds the set value, it outputs an alarm and sends a signal to the sealing cover drive assembly to drive the sealing cover to flip and block the inlet position in the low-lying area.

[0027] As a preferred embodiment of the present invention, the above method further includes:

[0028] The water level in the river at the sewer outlet is detected and sent to the main control module;

[0029] The main control module compares the water level in the river at the sewer outlet with the water level in the sewer pipe. If the water level in the river at the sewer outlet is higher than the water level in the sewer pipe, an alarm is output and a signal is sent to the sealing cover drive component to drive the sealing cover to flip and block the inlet position in the low-lying area.

[0030] As a preferred embodiment of the present invention, the above method further includes:

[0031] Detect the water level at the inlet in the low-lying area and send it to the main control module;

[0032] The system receives water level signals from the inlet at low-lying areas. At the same time, the main control module determines whether the water level signal in the sewer pipe exceeds the set value. If it does not exceed the set value, an alarm is output, and the sealing cover drive component does not operate.

[0033] The beneficial effects of this invention are as follows:

[0034] 1. The present invention provides an urban flood control early warning system that can detect the water level of various relevant areas in real time to determine the impact of the current water level on low-lying areas such as garages; and by setting automatic sealing covers, it can automatically seal low-lying areas such as garages under specific conditions, which can effectively prevent rainwater backflow in low-lying areas such as garages and avoid economic and property losses.

[0035] 2. The present invention also includes a passive sealing cover drive component, which can automatically drive the sealing cover to seal the flood warning system when the early warning system fails or misjudges the situation, based on the actual water level at the inlet in the low-lying area. Furthermore, the passive sealing cover drive component does not interfere with the sealing cover drive component of the flood warning system, thus further ensuring safety performance. Attached Figure Description

[0036] Figure 1 This is a logic block diagram of the urban flood early warning system of the present invention;

[0037] Figure 2 This is a schematic diagram of the structure at the garage entrance of the present invention.

[0038] Figure 3 This is a schematic diagram of the structure after the sealing cover at the garage entrance has been flipped and sealed.

[0039] Figure 4 This is a schematic diagram illustrating the structure of the sealing cover drive assembly of the present invention;

[0040] Figure 5 This is a schematic diagram illustrating the structure of the passive sealing cap drive assembly of the present invention;

[0041] Figure 6 This is a schematic diagram illustrating the retaining wall structure at the garage entrance of this invention;

[0042] Figure 7 This is a schematic diagram illustrating the structure of the sealing cover and retaining wall fastener of the present invention.

[0043] The components shown in the diagram are:

[0044] 1. Drainage channel; 11. Mounting bracket; 12. Sealing cover plate; 13. Retaining wall; 14. Perforated plate; 2. Sealing cover plate drive assembly; 21. Gas spring; 22. Roller; 23. Guide rod; 24. Sleeve; 25. Hook; 26. Receiving groove; 27. Inclined push plate; 28. Limiting plate; 29. ​​Tension spring; 3. Passive sealing cover drive assembly; 31. First pulley; 32. Second pulley; 33. Third pulley; 34. Fourth pulley; 35. First synchronous belt; 36. Second synchronous belt; 37. Connecting rod; 38. Float plate; 4. First push plate; 41. Second push plate; 5. Active control unit; 51. Control rod; 52. Gear; 53. Rack; 54. Electric cylinder; 55. Push plate; 6. Limit roller; 61. Housing; 62. Slot; 63. Limit seat; 64. Inclined guide surface; 65. Push spring; 66. Pull rod. Detailed Implementation

[0045] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0046] Example 1:

[0047] Reference Figure 1 This embodiment discloses an urban flood control early warning system. The system includes water level sensors. In this embodiment, three sets of water level sensors are installed: the first set is installed inside the sewer pipe to monitor the water level; the second set is installed at the sewer outlet to monitor the water level in the river at the outlet; and the third set is installed at the inlet of a low-lying area to monitor the water level at that inlet. A communication module is connected to each of the three sets of water level sensors to send the water level data to the main control module. A sealing cover is installed at the inlet of the low-lying area and can be flipped to seal the inlet. A sealing cover drive assembly drives the sealing cover to flip and seal the inlet. The main control module receives the water level data, controls the operation of the sealing cover drive assembly, and outputs alarm status. An alarm module, connected to the main control module, displays the alarm status.

[0048] In this embodiment, the communication module uses GPRS, 4G / 5G, etc. The choice of communication module depends on actual needs and is all existing technology, which will not be elaborated upon in this embodiment. The main control module uses a host computer, which is also a conventional approach for those skilled in the art and will not be described in detail here either. The alarm module uses an audible and visual alarm combined with a display, which is also existing technology and will not be described in detail here either.

[0049] In this embodiment, for clarity, the garage entrance is used as a representative of entrances in low-lying areas.

[0050] Reference Figure 2and Figure 3 The structure at the garage entrance includes a mounting frame 11. A drainage channel 1 is formed on the slope of the underground garage entrance. The mounting frame 11 is installed inside the drainage channel 1. A sealing cover 12 for covering part of the opening of the drainage channel 1 is hinged to the mounting frame 11. A sealing cover drive assembly 2 for controlling the flipping of the sealing cover 12 is provided on the mounting frame 11. Retaining walls 13 are fixedly connected to both sides of the drainage channel 1 on the slope of the garage entrance. The sealing cover 12 flips up and abuts against the retaining walls 13 on both sides, thereby sealing the underground garage entrance. A perforated plate 14 is also provided at the outlet of the drainage channel 1. The perforated plate 14 is used to supply water into the drainage channel 1, which is connected to a sewer pipe. When the sealing cover 12 covers the drainage channel 1, the perforated plate 14 is located on the side of the sealing cover 12 away from the hinge axis.

[0051] Reference Figure 4 The sealing cover drive assembly 2 includes a gas spring 21 hinged to the mounting bracket 11, with the other end of the gas spring 21 hinged to the sealing cover 12. When the sealing cover 12 covers the drainage trough 1, the axial direction of the gas spring 21 is parallel to the plane of the sealing cover 12. A support rod is fixedly connected to the side of the sealing cover 12 facing the mounting bracket 11, and a roller 22 is rotatably connected to the support rod. Two rollers 22 are symmetrically arranged on the sealing cover 12 along the hinge axis, and the rotation axis of the rollers 22 is always perpendicular to the hinge axis of the sealing cover 12. Guide rods 23 are fixedly connected to the mounting bracket 11 at the positions corresponding to the two rollers 22. The axial direction of the guide rods 23 is parallel to the hinge axis of the sealing cover 12. A sleeve 24 is slidably sleeved on the guide rod 23, with each sleeve 24 corresponding to one of the rollers 22, and the sleeve 24 cannot rotate on the guide rod 23. A hook 25 for engaging the roller 22 is fixedly connected to one end of the sleeve 24 along its own axial direction. The hook 25 and the sleeve 24 form a receiving groove 26 for accommodating the roller 22. A sloping push plate 27 is fixedly connected to the other end of the sleeve 24 along its own axial direction. The receiving groove 26 is positioned facing the sloping surface of the sloping push plate 27. The side of the sloping surface of the sloping push plate 27 away from the hook 25 is inclined towards the side opposite to the sleeve 24. The sloping surface of the sloping push plate 27 can push the roller 22 so that the sealing cover plate 12 extends out of the drainage groove 1.

[0052] The guide rod 23 is fixedly connected to limit plates 28 at both ends of the sleeve 24, allowing the sleeve 24 to slide between the two limit plates 28. When the sleeve 24 abuts against the limit plate 28 near the inclined push plate 27, the hook 25 engages the corresponding roller 22; when the sleeve 24 abuts against the limit plate 28 near the hook 25, the inclined push plate 27 pushes the corresponding roller 22, pushing the sealing cover 12 out of the drainage groove 1. A tension spring 29 is fixedly connected to one end of the sleeve 24 near the inclined push plate 27, and the end of the tension spring 29 away from the sleeve 24 is fixedly connected to the guide rod 23. The tension spring 29 pulls the sleeve 24 toward the limit plate 28 near the inclined push plate 27.

[0053] An active control unit 5 for controlling the synchronous movement of the sleeves 24 is also provided on the mounting frame 11. The active control unit 5 includes two control rods 51 slidably mounted on the mounting frame 11. The sliding direction of the control rods 51 is parallel to their own axis, and the axis of the control rods 51 is parallel to the axis of the guide rod 23. Each of the two control rods 51 is fixedly connected to a push plate 55 for pushing the sleeves 24 to move against the direction of the tension of the corresponding tension spring 29. A gear 52 is rotatably connected between the two control rods 51. The two control rods 51 are symmetrically arranged about the center of the gear 52. A rack 53 that meshes with the gear 52 is fixedly connected to the opposite surface of each of the two control rods 51. An electric cylinder 54 is fixedly connected to the frame, and the piston rod of the electric cylinder 54 is fixedly connected to one of the control rods 51. The electric cylinder 54 controls the rotation of one of the control rods 51. Under the linkage rotation of the gear 52, the two control rods 51 move in opposite directions, thereby driving the two sleeves 24 to move in opposite directions.

[0054] In this embodiment, the electric cylinder 54 is connected to the main control module via a wireless module. When the main control module issues a command, the electric cylinder 54 receives the command and activates, causing the drive rod 51 to move. This, in turn, causes the corresponding control rod 51 to slide. Under the transmission of the gear 52, the two control rods 51 move in opposite directions, causing the two sleeves 24 to move in opposite directions. Under the pushing action of the push plate 55, the two sleeves 24 move away from the direction of the corresponding tension spring 29. During this process, the hook 25 gradually releases its restraining effect on the roller 22, and the inclined surface of the push plate 27 pushes the roller 22, pushing the sealing cover 12 out of the drainage channel 1. Finally, under the action of the gas spring 21, the sealing cover 12 flips and abuts against the retaining wall 13, achieving the sealing effect on the entrance to the underground garage.

[0055] To prevent water from flowing back into the garage when the early warning system fails or misjudges, causing the water in the drainage trough 1 to fail to drain and instead flow into the garage, and the electric cylinder 54 to fail to activate and block the garage entrance by driving the sealing cover 12, this embodiment also includes a passive sealing cover drive assembly 3, which is used to drive the sealing cover 12 to block the garage entrance when the water level in the drainage trough 1 is too high.

[0056] Reference Figure 5The passive sealing cap drive assembly 3 includes a first pulley 31, a second pulley 32, a third pulley 33, and a fourth pulley 34 fixedly connected to the mounting bracket 11. A first synchronous belt 35 is wound between the first pulley 31 and the second pulley 32, and a second synchronous belt 36 is wound between the third pulley 33 and the fourth pulley 34. The diameter of the first pulley 31 is smaller than the diameters of the second pulley 32, the third pulley 33, and the fourth pulley 34. The third pulley 33 and the fourth pulley 34 have the same diameter and are spaced apart along the axial direction of the guide rod 23. The second pulley 32 and the third pulley 33 are fixedly connected coaxially. A connecting rod 37 is fixedly connected to the first pulley 31. A float 38 is movably connected to the end of the connecting rod 37 away from the first pulley 31. The float 38 can rise and fall under the buoyancy of the water, thereby driving the first pulley 31 to rotate. Under the transmission action of the first synchronous belt 35, it drives the second pulley 32 and the third pulley 33 to rotate, thereby causing the second synchronous belt 36 to move. The first push plate 4 is fixedly connected to the second synchronous belt 36, and the second push plate 41 is fixedly connected to the side of the sleeve 24 facing the second synchronous belt 36. The first push plate 4 can push the second push plate 41 towards the limiting plate 28 near the hook 25 under the drive of the second synchronous belt 36.

[0057] As rainwater flows down the slope of the garage entrance into the drainage ditch 1, if the drainage in the drainage ditch 1 becomes blocked, or if the drainage speed is slower than the inflow speed, the water level in the drainage ditch 1 will gradually rise, causing the float plate 38 to lift. After the float plate 38 rises, it causes the connecting rod 37 to flip, which in turn causes the first pulley 31 to rotate. Under the transmission action of the first synchronous belt 35 and the second synchronous belt 36, the first push plate 4 pushes the second push plate 41 to move away from the tension spring 29. During this process, the hook 25 gradually releases its limiting effect on the roller 22, and the inclined surface of the inclined push plate 27 pushes the roller 22, pushing the sealing cover 12 out of the drainage ditch 1. Finally, under the action of the gas spring 21, the sealing cover 12 flips and abuts against the retaining wall 13, achieving the sealing effect of the underground garage entrance.

[0058] Reference Figure 6 and Figure 7 Limiting rollers 6 are fixedly connected to the two retaining walls 13 on the sealing cover plate 12. The axial direction of the limiting rollers 6 is always perpendicular to the hinge axis of the sealing cover plate 12. A housing 61 is installed on the retaining wall 13, and a slot 62 is provided on the housing 61 for the limiting rollers 6 to pass through. A limiting seat 63 slides along the hinge axis of the sealing cover plate 12 inside the housing 61. An inclined guide surface 64 is provided on the side of the limiting seat 63 facing the slot 62. A push spring 65 is provided inside the housing 61 to push the limiting seat 63 against the inner wall of the housing 61. A pull rod 66 passes through the housing 61 near the push spring 65 and is fixedly connected to the limiting seat 63.

[0059] During the process of the sealing cover 12 flipping to abut against the retaining wall 13, the limiting roller 6 on the sealing cover 12 is inserted into the slot 62 and pushes the inclined guide surface 64, so that the limiting seat 63 moves against the elastic force of the corresponding push spring 65. After the limiting roller 6 passes the limiting seat 63, the limiting seat 63 is reset under the elastic force of the push spring 65, thereby restricting the limiting roller 6 from disengaging, thus achieving the limiting effect on the sealing cover 12, so that the sealing cover 12 maintains the sealing effect on the entrance of the underground garage.

[0060] Example 2:

[0061] This embodiment discloses a control method for an urban flood warning system. The control method is based on the urban flood warning system of Embodiment 1. This system is divided according to region, and multiple communities within a community or street are controlled as a warning monitoring module. The specific control method includes the following steps:

[0062] The water level sensor detects the water level in the sewer pipe and sends the data to the main control module.

[0063] The main control module receives the water level signal from the water level sensor. When the water level exceeds the set value, it determines that there is a drainage failure in the sewer pipe, outputs an alarm, and sends a signal to the sealing cover drive assembly 2, which drives the sealing cover 12 to flip and block the garage entrance.

[0064] The water level sensor detects the water level in the river at the outlet of the sewer pipe and sends the data to the main control module;

[0065] The main control module compares the water level in the river at the sewer outlet with the water level in the sewer pipe. If the water level in the river at the sewer outlet is higher than the water level in the sewer pipe, it means that there is a risk that the water behind it cannot be discharged. The module will output an alarm and send a signal to the sealing cover drive component 2, which will drive the sealing cover 12 to flip and block the garage entrance.

[0066] The water level sensor detects the water level in the drainage ditch 1 at the garage entrance and sends it to the main control module;

[0067] The main control module receives the water level signal in the drainage trough 1 at the garage entrance. At the same time, the main control module determines whether the water level signal in the sewer pipe exceeds the set value. If it does not exceed the set value, it means that the drainage trough 1 is blocked and the risk of rainwater backflow into the garage is not high. An alarm is output to remind staff to clean the drainage trough.

[0068] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An urban flood early warning system, characterized in that, include: A water level sensor is installed inside the sewer pipe to monitor the water level within the pipe. The communication module, connected to the water level sensor, is used to send the water level status monitored by the water level sensor to the main control module; A sealing cover is provided at the entrance of a low-lying area, and the sealing cover can be flipped to seal the entrance of the low-lying area; The sealing cover drive assembly is used to drive the sealing cover to flip and seal the entrance in the low-lying area; The main control module is used to receive water level status, control the action of the sealing cover drive component, and output alarm status. A passive sealing cover driving assembly, wherein when the inlet at a low-lying area reaches a set water level, the passive sealing cover driving assembly automatically drives the sealing cover plate to flip and seal the inlet at the low-lying area. The sealing cover drive assembly includes: A gas spring, one end of which is hinged to the cover plate and the other end is hinged to the mounting bracket at the entrance of the depression. Rollers are mounted on the back of the sealing cover via support rods; A guide rod is mounted on a mounting bracket, and the length direction of the guide rod is parallel to the hinge axis of the sealing cover plate; A sleeve is fitted onto a guide rod and can move along the length of the guide rod. One end of the sleeve along its own length is fixedly connected to a hook for engaging a roller, and the hook and the sleeve form a receiving groove for accommodating the roller. The other end of the sleeve along its own axial direction is fixedly connected to an inclined push plate, and the receiving groove is set facing the inclined surface of the inclined push plate. The side of the inclined push plate away from the hook is inclined towards the side away from the sleeve. A tension spring, one end of which is connected to a guide rod and the other end of which is connected to a sleeve, the tension spring being able to pull the sleeve to move on the guide rod; A limiting plate is provided on the guide rod to limit the position of the sleeve on the guide rod; The sleeve drive mechanism can drive the sleeve to move along the length of the guide rod.

2. The urban flood early warning system according to claim 1, characterized in that: The water level sensor is set in three sets. The first set of water level sensors is set inside the sewer pipe to monitor the water level in the sewer pipe. The second set of water level sensors is set at the outlet of the sewer pipe to monitor the water level in the river at the outlet. The third set of water level sensors is set at the inlet of the low-lying area to monitor the water level at the inlet of the low-lying area.

3. The urban flood early warning system according to claim 1, characterized in that: The passive sealing cap drive assembly includes a first pulley, a second pulley, a third pulley, and a fourth pulley fixedly connected to the mounting bracket; a first synchronous belt is wound between the first and second pulleys, and a second synchronous belt is wound between the third and fourth pulleys; the second and third pulleys are coaxially fixedly connected, a connecting rod is fixedly connected to the first pulley, and a float plate is movably connected to the end of the connecting rod away from the first pulley. The float plate can rise and fall under the buoyancy of the water, thereby driving the first pulley to rotate; a first push plate is fixedly connected to the second synchronous belt, and the first push plate can push the sleeve toward the limiting plate near the hook under the drive of the second synchronous belt.

4. The urban flood early warning system according to claim 1, characterized in that: The sleeve drive mechanism includes two control rods slidably mounted on the mounting frame. The sliding direction of the control rods is parallel to their own axial direction and parallel to the length direction of the guide rod. Each control rod is fixedly connected to a push plate for moving the sleeve. A gear is rotatably connected between the two control rods. The two control rods are symmetrically arranged about the center of the gear. A rack that meshes with the gear is fixedly connected to the opposite surface of each control rod. A power source for driving one of the control rods to slide is also provided on the mounting frame.

5. The control method for an urban flood early warning system according to claim 1, characterized in that, Includes the following steps: The water level sensor detects the water level in the sewer pipe and sends the data to the main control module. The main control module receives the water level signal from the water level sensor. When the water level exceeds the set value, it outputs an alarm and sends a signal to the sealing cover drive assembly to drive the sealing cover to flip and block the inlet position in the low-lying area.

6. The control method for an urban flood early warning system according to claim 5, characterized in that, Also includes: The water level in the river at the sewer outlet is detected and sent to the main control module; The main control module compares the water level in the river at the sewer outlet with the water level in the sewer pipe. If the water level in the river at the sewer outlet is higher than the water level in the sewer pipe, an alarm is output and a signal is sent to the sealing cover drive component to drive the sealing cover to flip and block the inlet position in the low-lying area.

7. The control method for an urban flood early warning system according to claim 5, characterized in that, Also includes: The system detects the water level at the inlet of the low-lying area and sends it to the main control module; it receives the water level signal at the inlet of the low-lying area, and at the same time, the main control module determines whether the water level signal in the sewer pipe exceeds the set value. If it does not exceed the set value, it outputs an alarm and the sealing cover drive component does not operate.

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