Urban waterlogging siphon energy-adding drainage device and method

Abstract

This invention proposes a siphon-assisted drainage device and method for urban flooding in the field of water conservancy. It includes a flow pump, an energy tank, an underground water collection tank, a check valve, a siphon pipe, and a siphon self-control valve. The siphon pipe inlet starts from the underground water collection tank, passes through the road surface, slope, and then crosses the upper part of the river embankment, spans the pedestrian walkway, and enters the riverbed through a siphon riser. The outlet is connected to the siphon self-control valve. The underground water collection tank is located below the road surface, and its upper part is equipped with a check valve that automatically closes when full. An energy tank is also located at the top of the underground water collection tank. When water accumulates on the road surface, the flow pump is activated to pump water into the energy tank. A level difference exists between the energy tank and the top of the siphon pipe, creating gravity flow. When the water flows to the siphon self-control valve, the outlet automatically closes, allowing water to exit but preventing air from entering. This creates a closed space in the siphon pipe system, where high-level gravity flow and high-level siphon flow are generated simultaneously under the influence of gravity flow. This method is suitable for application as a siphon-assisted drainage device and method for urban flooding.

Description

Technical Field

[0001] This invention provides a drainage system for the hydraulic field, primarily applied to urban flooding. Specifically, it relates to a siphon-assisted, energy-enhanced drainage device and method for urban flooding. Background Technology

[0002] Currently, due to historical and other reasons, most urban areas in my country experience varying degrees of water accumulation in low-lying sections of roads, highways, railway bridges, and culverts after heavy rain or torrential rainfall. This waterlogging, which cannot be drained in time, has a significant impact on the daily production, life, transportation, and other aspects of local people. Cars being submerged is common, and there have even been cases of drowning deaths.

[0003] With social development and improved economic conditions, most cities have implemented underground pipe networks and overall water network layout and renovation, significantly improving urban stormwater and sewage drainage capacity. Despite this, many urban areas still experience flooding during the rainy season. The main reasons are the distance between low-lying areas and rivers, the small elevation difference between roads and river surfaces, and the limited pipe diameter. The elevation difference between roads and river surfaces is even smaller in actual construction and application. Drainage over long distances with small elevation differences and limited pipe diameter results in slow water flow and low volume, making urban flooding a normal occurrence due to natural limitations. Furthermore, slow water flow can lead to sediment buildup and blockages, requiring regular inspection and cleaning. Drainage pipes must be laid with a slope to avoid unevenness, which increases resistance and affects flow rate.

[0004] In addition, to prevent water accumulation in highway and railway bridge culverts, underground water storage tanks are often built in suitable locations near suitable areas where conditions permit or they are of particular importance. When heavy rainfall occurs and water accumulates on the road surface, the rainwater is drained into the storage tanks to alleviate the problem of road flooding. However, the storage capacity is limited, and maintenance, repair, upkeep, and management are required. Most importantly, some cities lack the conditions to build underground water storage tanks near culverts in older urban areas because the required conditions are too numerous and complex to meet or implement. Rainwater in the storage tanks generally requires secondary treatment and regular cleaning, making it a difficult undertaking. Normally, rainwater is pumped from the culvert's collection tank and discharged directly into the city's underground drainage network, eventually flowing into rivers, which presents the same problems as above.

[0005] In summary, given that the distance between the road surface and the river surface in low-lying urban areas, as well as the distance between flooded areas and the river, is fixed, it is difficult to achieve the desired results using traditional methods and technologies. Therefore, there is an urgent need for a new technology and method that can utilize existing conditions, enhance drainage capacity, and be more practical to solve the fundamental problem of urban flooding. Summary of the Invention

[0006] To address the problem of urban flooding drainage, this invention proposes an urban flooding siphon-assisted drainage device and method. This method utilizes an urban flooding siphon-assisted drainage device, which can be operated manually, automatically, or remotely, to rapidly drain water from low-lying roads, highway and railway bridges and culverts, thus solving the technical problem of urban flooding.

[0007] The solution adopted by this invention to solve the technical problem is:

[0008] An urban flooding siphon-enhanced drainage device includes a conventional siphon device and an enhanced siphon device;

[0009] A typical siphon system includes an underground water collection tank, a check valve, a siphon pipe, a siphon self-control valve, and a siphon starting device;

[0010] The enhanced siphon device has a flow pump and an energy tank, and is used in conjunction with the ordinary siphon device. Its siphon start is directly initiated by gravity flow, and high-level gravity flow occurs simultaneously, eliminating the need for siphon start equipment. The flow pump and energy tank are connected by a pipe joint, and the bottom of the energy tank is connected to the top of the underground water collection tank. A rainwater inlet is provided at the top of the underground water collection tank, and a check valve is installed at the rainwater inlet, which automatically closes when the underground water collection tank is full. The siphon pipe is inserted into the underground water collection tank, with the siphon inlet extending deep into the lower part of the underground water collection tank. It passes through the road surface and slope, crosses the upper part of the river embankment, crosses the pedestrian walkway, extends to the bottom of the bridge deck, and then enters the bottom of the riverbed from top to bottom through the siphon riser, and is connected to the siphon self-control valve at the outlet of the siphon pipe.

[0011] To further address the technical problem this invention aims to solve, a siphon-assisted drainage method for urban flooding includes the following steps:

[0012] (1). Manual operation:

[0013] First, if there is indeed rainwater accumulation on the road surface, the flow pump is manually turned on to pump the rainwater from the road surface's water collection trough into the energy tank. The rainwater in the energy tank then flows into the underground water collection trough, which already contains rainwater. At this time, the check valve at the top of the underground water collection trough begins to gradually close from its original fully open state. As the liquid level in the energy tank rises higher and higher, the check valve closes completely, and the underground water collection trough and the energy tank form a single container.

[0014] Secondly, when the liquid level in the energy tank rises to the same height as the top of the siphon tube, rainwater begins to enter from the lower siphon inlet of the underground water collection tank, passing through the road surface, slope, river embankment, and pedestrian walkway, until it enters the siphon self-control valve at the outlet of the siphon tube through the siphon riser. The outlet is automatically sealed with water, forming a closed space. The outlet flow gradually increases, and gas is continuously discharged until all the gas is expelled and the liquid occupies the entire space inside the siphon tube, i.e., the siphon system is activated. At the same time, the high-level gravity flow is activated. During the activation process, the outlet flow of the siphon tube fluctuates greatly, eventually reaching a rapid and stable state with a continuous full flow of water. Relying on the gravity flow generated by the liquid level difference between the energy tank and the top of the siphon tube, under the action of the siphon self-control valve, the siphon and high-level gravity flow are triggered. The gravity flow changes from the original low-level gravity flow to a high-level gravity flow, and the flow rate increases significantly.

[0015] Finally, when the water level in the energy tank drops to the set low level, the flow pump is manually shut off. The remaining water on the road surface continues to be discharged into the river through a standard siphon until the water level is level with the riverbed. If there is further rainfall and water accumulation in a short period of time, the standard siphon can automatically drain the water. If the rainfall is too heavy and there is a lot of water accumulation, the flow pump needs to be manually turned on again, following the same procedure. Under normal circumstances, the device does not need to be restarted.

[0016] (2). Automatic operation:

[0017] First, a water level sensor is installed in the water collection tank at the inlet of the flow pump, with high and low levels set, and connected to the electrical switch of the flow pump. When the water on the road surface reaches the set height at the inlet of the flow pump, the water level signal at the sensor is transmitted to the electrical switch, and at the same time, the flow pump is started to pump the water on the road surface into the energy tank.

[0018] Secondly, the process flow and working principle of siphon start-up and high-level gravity flow start-up are the same as those of manual operation.

[0019] Finally, when the water level reaches a low level, the water level sensor instructs the electrical switch to close, the flow pump to stop operating, and the ordinary siphon is in a low-level operating state without external energy, which can normally pump out the remaining water on the road surface until the water level in the underground sump is the same as the riverbed water level.

[0020] (3) Remote control:

[0021] First, install a remote control on the flow pump control switch circuit. Use a field camera and remote monitor to check the water level on site, and control the flow pump to pump the water into the energy tank via the remote control.

[0022] Secondly, the siphon start-up is simultaneously with the high-level gravity flow start-up, and the process flow and working principle are the same as those of manual operation.

[0023] Finally, when the water level on the road surface drops to the set position, the remote control shuts off the flow pump, and the remaining water continues to be discharged at a low level by the ordinary siphon device until the water level in the underground water tank is the same as the water level in the riverbed.

[0024] The positive effects are significant because this invention combines an energy-enhanced siphon device with a conventional siphon device, and also incorporates a flow pump and an energy tank. Siphon activation is directly triggered by gravity flow, with simultaneous high-level gravity flow, eliminating the need for additional siphon activation equipment. Multiple siphon inlets and underground drainage tanks can be added, and they can be connected in series or parallel to a unified outlet. The energy-enhanced siphon device not only creates a siphon but also transforms the original low-level gravity flow into a high-level gravity flow, greatly increasing the flow rate, extending the drainage distance, and broadening its applicability. It is suitable for application as an energy-enhanced siphon drainage device and method for urban flooding. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the present invention.

[0027] In the diagram, 1. Flow pump, 2. Connecting pipe, 3. Energy tank, 4. Road surface, 5. Slope, 6. Bridge deck, 7. Rainwater inlet, 8. Check valve, 9. Siphon inlet, 10. Underground water collection tank, 11. Siphon pipe, 12. River embankment, 13. Pedestrian walkway, 14. Siphon self-control valve, 15. Riverbed, 16. Siphon riser. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] As shown in the figure, an urban flooding siphon-enhanced drainage device includes a conventional siphon device and an enhanced siphon device.

[0030] A standard siphon device includes an underground water collection tank 10, a check valve 8, a siphon pipe 11, a siphon self-control valve 14, and a siphon starting device. The siphon pipe 11 starts from the underground water collection tank 10, passes through the road surface 4 and the slope 5, then crosses the upper part of the river embankment 12, passes over the pedestrian walkway 12, and enters the riverbed 15 through the siphon riser 16. Its outlet is connected to the siphon self-control valve 14. The siphon self-control valve 14 is a liquid level water seal.

[0031] The energy-enhanced siphon device has a flow pump 1 and an energy tank 3, and is used in conjunction with a regular siphon device. Its siphon start is directly triggered by gravity flow, and high-level gravity flow occurs simultaneously, eliminating the need for siphon start equipment. The flow pump 1 and the energy tank 3 are connected via a pipe 2. The bottom of the energy tank 3 is connected to the top of the underground water collection tank 10. A rainwater inlet 7 is provided at the top of the underground water collection tank 10, and a check valve 8 is installed at the rainwater inlet 7. The check valve 8 automatically closes when the underground water collection tank 10 is full. The siphon pipe 11 is inserted into the underground water collection tank 10. The siphon inlet 9 of the siphon pipe 11 extends into the lower part of the underground water collection tank 10, passes through the road surface 4 and the slope 5, passes through the upper part of the river embankment 12, crosses the pedestrian walkway 13, extends to the bottom of the bridge deck 6, and then enters the bottom of the riverbed 15 from top to bottom through the siphon riser 16, and is connected to the siphon self-control valve 14 at the outlet of the siphon pipe 11.

[0032] The underground water collection tank 10 is a sealed container located under the road surface 4, used for collecting water from the road surface 4.

[0033] Energy tank 3 is a sealed vertical container.

[0034] When water accumulates on road surface 4, the flow pump 1 is activated to pump the water from the water accumulation trough on road surface 4 into the energy tank 3. The water then flows through the energy tank 3 into the underground water accumulation trough 10. Once the underground water accumulation trough 10 is full, the check valve 8 automatically closes. Water then enters from the siphon inlet 9 of the siphon pipe 11, flows through road surface 4, slope 5, crosses the upper part of the river embankment 12, spans the pedestrian walkway 13, and flows down through the siphon riser 16 to the siphon self-control valve 14 at the outlet of the siphon pipe 11. An automatic water seal is established, creating a sealed space from the outlet of the siphon pipe 11 to the energy tank 3. Water can then... Gas is allowed to exit but not enter. Under the continuous action of gravity flow, gas is continuously discharged and liquid continuously occupies space. Finally, all the gas is discharged. At this time, the siphon is activated. At the same time, the high-level gravity flow in energy tank 3 is activated. The gravity flow changes from the original low-level gravity flow to the high-level gravity flow. The flow rate of siphon pipe 11 increases significantly. Due to the sudden increase in flow rate, the device instantly changes from high-level gravity flow to high-level siphon flow or low-level siphon flow. That is, the liquid level in energy tank 3 instantly drops from the original high level to the low level. At this time, it is necessary to increase the number of flow pumps 1 to improve the drainage capacity.

[0035] In addition, after the water accumulation on road surface 4 is reduced and the flow pump 1 is shut down, the remaining water on road surface 4 can still be discharged normally using a standard siphon device alone.

[0036] Multiple siphon inlets 9 and underground water collection tanks 10 can be added, and they can be connected in series or parallel to form a unified outlet.

[0037] A siphon-assisted drainage method for urban flooding includes the following steps:

[0038] (1) Manual operation:

[0039] First, if there is indeed rainwater accumulation on the road surface 4, the flow pump 1 is manually turned on to pump the rainwater from the water collection tank of the road surface 4 to the energy tank 3. The rainwater in the energy tank 3 flows into the underground water collection tank 10, which already contains rainwater. At this time, the check valve 8 at the top of the underground water collection tank 10 starts to gradually close from its original fully open position. When the liquid level in the energy tank 3 rises higher and higher, the check valve 8 is completely closed, and the underground water collection tank 10 and the energy tank 3 form a container.

[0040] Secondly, when the liquid level in the energy tank 3 rises to the same height as the top of the siphon pipe 11, rainwater begins to enter from the lower siphon inlet 9 in the underground water accumulation tank 10, passing through the road surface 4, slope 5, river embankment 12, and pedestrian walkway 13, until it enters the siphon self-control valve 14 at the outlet through the siphon riser 16 at the very top of the siphon pipe 11. The outlet is automatically sealed with water, forming a closed space. The outlet flow gradually increases, and gas is continuously discharged until all the gas is discharged and the liquid occupies the entire space inside the siphon pipe 11, i.e., the siphon system is started. At the same time, the high-level gravity flow is started. During the start-up process, the outlet flow of the siphon pipe 11 fluctuates greatly, eventually reaching a rapid and stable state with a continuous full flow of water. Relying on the gravity flow generated by the liquid level difference between the energy tank 3 and the top of the siphon pipe 11, under the action of the siphon self-control valve 14, the siphon and high-level gravity flow are triggered. The gravity flow changes from the original low-level gravity flow to a high-level gravity flow, and the flow rate increases significantly. In addition, after the siphon and high-level gravity flow are started, the flow rate increases significantly, so it is necessary to increase the number of flow pumps 1 that are turned on to ensure the water level in the energy tank 3 is as high as possible.

[0041] Finally, when the water level in energy tank 3 drops to the set low level, flow pump 1 is manually shut off. The remaining water on the road surface continues to be discharged into the river through a standard siphon until the water level is equal to the riverbed level. If there is further rainfall and water accumulation in a short period of time, the standard siphon can automatically drain the water. If the rainfall is too heavy and there is a lot of water accumulation, flow pump 1 needs to be manually turned on again, following the same procedure. Under normal circumstances, the device does not need to be restarted.

[0042] (2) Automatic operation:

[0043] First, a water level sensor is installed in the water collection tank at the inlet of the flow pump 1, with high and low levels set, and connected to the electrical switch of the flow pump 1. When the water on the road surface 4 reaches the set height at the inlet of the flow pump 1, the water level signal at the sensor is transmitted to the electrical switch, and at the same time, the flow pump 1 is started to pump the water on the road surface 4 into the energy tank 3.

[0044] Secondly, the process flow and working principle of siphon start-up and high-level gravity flow start-up are the same as those of manual operation.

[0045] Finally, when the water level reaches a low level, the water level sensor instructs the electrical switch to close, the flow pump 1 stops operating, and the ordinary siphon is in a low-level operating state without external energy, which can normally pump the remaining water on the road surface 4 until the water level in the underground water tank 10 is the same as the water level in the riverbed 15.

[0046] (3) Remote control:

[0047] First, install a remote control on the control switch line of flow pump 1. Use the on-site camera and remote monitor to check the water level on-site. Control the flow pump 1 to pump the water into the energy tank through the remote control.

[0048] Secondly, the siphon start-up is simultaneously with the high-level gravity flow start-up, and the process flow and working principle are the same as those of manual operation.

[0049] Finally, when the water level on the road surface 4 drops to the set position, the remote control shuts off the flow pump 1, and the remaining water continues to be discharged at a low level by the ordinary siphon device until the water level in the underground water tank 10 is the same as the water level in the riverbed 15.

[0050] The working principle of this embodiment:

[0051] The gravity flow generated by the positional difference between the energy tank 3 and the liquid surface at the top of the siphon tube 11 is automatically closed at the outlet after passing through the riser of the siphon tube 11 and the siphon self-control valve 14. Water can exit, but gas is allowed to exit but not enter. As liquid continuously enters and gas continuously exits, the space in the siphon riser 16 is gradually occupied by liquid. When all the gas in the siphon tube 11 is exhausted, the high-level gravity flow is activated, changing from the original low-level gravity flow to a high-level gravity flow, and the high-level siphon is activated at the same time. When the low-level gravity flow suddenly changes to a high-level gravity flow and the high-level siphon is activated, the flow rate will also suddenly increase. Given the limited volume of the energy tank 3 and the capacity of the flow pump 1, the liquid level will suddenly drop to the low position at the siphon inlet 9, changing from a high-level gravity flow to a high-level siphon flow or a low-level siphon flow. After this fluctuation, the device will maintain this state of operation while the flow rate of the flow pump 1 remains unchanged.

[0052] To increase the drainage speed, it is normal to increase the number of flow pumps 1 that are turned on or take other measures. Under normal circumstances, it is best to keep the device operating between high-level gravity flow and high-level siphon flow for higher efficiency. When the water volume decreases and flow pump 1 stops operating, the device can continue to drain water using ordinary siphon until the water on the road surface is pumped out and the liquid level at the siphon inlet 9 in the underground water collection tank 10 is the same as the liquid level in the riverbed 15.

[0053] Features of this embodiment:

[0054] This invention consists of two parts. The first part is a common siphon device that can be used alone. It includes a siphon pipe 11, an underground water collection tank 10, a siphon self-control valve 14, and a siphon starting device. Under normal circumstances, it can be used in some areas where waterlogging is not very severe. It generally has better drainage effect than underground pipe networks under the same conditions. It is simple to construct, does not occupy space, does not backflow, does not require electricity during the siphon process, does not cause blockage, and does not require cleaning.

[0055] The second part is an energy-enhanced siphon device, mainly consisting of an energy tank 3 and a high-flow pump 1, used in conjunction with the first part. Siphon activation is directly triggered by gravity flow, with a high-level gravity flow occurring simultaneously, eliminating the need for siphon activation equipment. Siphon activation is convenient and quick, requiring only the operation of the start-up pump 1. Rainwater flows through the gravity flow generated by the water level difference between the energy tank 3 and the top of the siphon pipe 11, then through the siphon riser 16 and the outlet siphon self-control valve 14. This energy-enhanced siphon device activates both the siphon and the high-level gravity flow simultaneously, changing the flow rate from low-level gravity flow to high-level gravity flow or high-level siphon flow, significantly increasing the flow rate. Therefore, the energy-enhanced siphon device not only creates a siphon but also transforms the original low-level gravity flow into a high-level gravity flow, greatly increasing the flow rate, extending the drainage distance, and broadening its application range. It possesses all the advantages of ordinary siphon devices, and even has stronger drainage capacity and higher efficiency. The higher the energy tank 3, the stronger the device's capacity; therefore, a more powerful flow pump 1 is required, resulting in a stronger drainage capacity for the device. The specifications, model, pipe diameter, and length of the equipment can be customized according to actual needs. The system can still be used even when encountering obstacles or uneven terrain during siphon pipe laying; these issues can be addressed appropriately. Multiple siphon inlets (9) and underground water collection tanks (10) can be added, and the system can be connected in series or parallel to a unified outlet. During operation, the device can operate with or without electricity; that is, it uses electricity when there is a lot of water and does not use electricity when there is little water.

[0056] When water accumulates in highway and railway bridge culverts, the underground water collection tank 10 may not be necessary. Instead, rainwater collected from the drainage ditches on both sides of the culvert bottom can be concentrated in the underground water collection tank and pumped directly to the energy tank 3 above the road surface 4 by the flow pump 1. Then, the water flows through the siphon inlet 9 inside the energy tank 3 and through the siphon pipe 11 to the outlet siphon self-control valve 14, thus achieving rapid drainage by siphon and high-level gravity flow.

[0057] Precautions: 1. For ordinary siphon devices, protective measures should be taken during long-term operation to ensure that the siphon capacity is not reduced. 2. Protective measures should be taken at the inlet of the flow pump 1 to prevent blockage by debris. 3. The height of the siphon riser 16 should be higher than the height of the river embankment 12, and the foundation should be firm and reliable.

[0058] Although the flow pump 1 requires electricity to operate, occupies space, and requires maintenance and management, it has a wider range of applications, better performance, and higher efficiency. It is mainly suitable for drainage of flooded areas in key low-lying urban sections and areas, as well as for drainage in highway and railway bridges and culverts, long-distance water conveyance, and long-distance liquid transportation in petrochemical storage tanks.

[0059] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A siphon-assisted drainage device for urban flooding, characterized in that: Including standard siphon devices and energized siphon devices; The ordinary siphon device includes an underground water collection tank (10), a check valve (8), a siphon pipe (11), a siphon self-control valve (14), and a siphon starting device; The energized siphon device has a flow pump (1) and an energy tank (3), and is used in conjunction with a regular siphon device. Its siphon start is directly initiated by gravity flow, and high-level gravity flow occurs simultaneously, without the need for siphon start equipment. The flow pump (1) and the energy tank (3) are connected by a connecting pipe (2). The bottom of the energy tank (3) is connected to the top of the underground water accumulation tank (10). A rainwater inlet (7) is provided at the top of the underground water accumulation tank (10), and a check valve (8) is installed at the rainwater inlet (7). The water collection trough (10) is automatically closed when it is full; the siphon pipe (11) is inserted into the underground water collection trough (10), and the siphon inlet (9) of the siphon pipe (11) extends into the lower part of the underground water collection trough (10), passes through the road surface (4) and slope (5), passes through the upper part of the river embankment (12), crosses the pedestrian walkway (13), extends to the bottom of the bridge deck (6), and then enters the bottom of the riverbed (15) from top to bottom through the siphon riser (16), and is connected to the siphon self-control valve (14) at the outlet of the siphon pipe (11).

2. The urban flooding siphon-assisted drainage device according to claim 1, characterized in that: The underground water collection tank (10) is a sealed container located under the road surface (4) and is used for water collection from the road surface (4).

3. The urban flooding siphon-assisted drainage device according to claim 1, characterized in that: The energy tank (3) is a sealed vertical container.

4. The urban flooding siphon-assisted drainage device according to claim 1, characterized in that: The siphon inlet (9) and the underground water collection tank (10) can be added at multiple points and can be connected in series or in parallel to form a unified outlet.

5. A siphon-assisted drainage method for urban flooding, characterized by: The urban flooding siphon-assisted drainage device according to any one of claims 1-4 includes the following steps: 1) Manual operation: First, if there is indeed rainwater accumulation on the road surface (4), manually operate the flow pump (1) to pump the rainwater from the water accumulation trough on the road surface (4) to the energy tank (3). The rainwater in the energy tank (3) flows into the underground water accumulation trough (10) which already contains rainwater. At this time, the check valve (8) at the top of the underground water accumulation trough (10) starts to gradually close from its original fully open position. When the liquid level in the energy tank (3) rises higher and higher, the check valve (8) is completely closed, and the underground water accumulation trough (10) and the energy tank (3) form a container. Secondly, when the liquid level in the energy tank (3) begins to rise to the same height as the top of the siphon pipe (11), rainwater begins to enter from the lower siphon inlet (9) in the underground water accumulation tank (10), passing through the road surface (4), slope (5), river embankment (12), and pedestrian walkway (13), until it enters the siphon self-control valve (14) at the outlet through the siphon riser (16) at the very top of the siphon pipe (11). The outlet is automatically sealed with water, making the device form a closed space. The outlet flow gradually increases from small to large, and gas is continuously discharged. The siphon system is activated when all the gas is exhausted and the liquid occupies the entire space inside the siphon tube (11). At the same time, the high-level gravity flow is activated. During the activation process, the outlet flow of the siphon tube (11) fluctuates greatly, eventually reaching a rapid and stable flow with a continuous full mouth of water. The gravity flow generated by the liquid level difference between the energy tank (3) and the top of the siphon tube (11) is triggered by the siphon self-control valve (14) to induce siphon and high-level gravity flow. The gravity flow changes from the original low-level gravity flow to high-level gravity flow, and the flow rate increases significantly. Finally, when the water level in the energy tank (3) drops to the set low water level, the flow pump (1) is manually shut off. The remaining water on the road continues to be discharged into the river through the ordinary siphon device until the water level is equal to the riverbed water level. If there is more rain and water accumulation in a short period of time, the ordinary siphon device can automatically drain the water. If the rainfall is too heavy and there is a lot of water accumulation, the flow pump (1) needs to be manually turned on. The operation is the same as above. Under normal circumstances, the device does not need to be restarted. 2) Automatic operation: First, a water level sensor is installed in the water collection tank at the inlet of the flow pump (1), with high and low levels set, and connected to the electrical switch of the flow pump (1); when the water on the road surface (4) reaches the height set at the inlet of the flow pump (1), the water level signal at the sensor is transmitted to the electrical switch, and at the same time, the flow pump (1) is started to pump the water on the road surface (4) into the energy tank (3). Secondly, the process flow and working principle of siphon start-up and high-level gravity flow start-up are the same as those of manual operation. Finally, when the water level reaches a low level, the water level sensor commands the electrical switch to close, the flow pump (1) stops running, and the ordinary siphon is in a low-level operating state without external energy, which can normally pump the remaining water on the road surface (4) until the water level in the underground water tank (10) is the same as the water level in the riverbed (15). 3) Remote control: First, install a remote controller on the control switch line of the flow pump (1), use the on-site camera and remote monitor to check the water level of the water accumulation on-site, and control the flow pump (1) to pump the water accumulation into the energy tank through the remote controller; Secondly, the siphon start-up is simultaneously with the high-level gravity flow start-up, and the process flow and working principle are the same as those of manual operation. Finally, when the water level on the road surface (4) drops to the set position, the remote control turns off the flow pump (1), and the remaining water continues to be discharged at a low level by the ordinary siphon device until the water level in the underground water tank (10) is the same as the water level in the riverbed (15).

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