Urban overpass unpowered rainwater intelligent sprinkling greening compensation system

Abstract

The present application relates to urban overpass deck rainwater utilization technical field, disclose a kind of urban overpass unpowered rainwater intelligent sprinkling irrigation greening compensation system, comprising: central controller, rainwater collection sedimentation tank, spraying system and spraying system;Rainwater collection sedimentation tank is connected with deck rainwater discharge pipe, and rainwater collection sedimentation tank is connected with sedimentation tank outlet pipe on it;Spraying system and spraying system are all connected on sedimentation tank outlet pipe, and the spray head of spraying system and the spray head of spraying system are all arranged above the green belt.The system of the present application utilizes overpass deck rainwater to carry out sprinkling irrigation to green belt plant and dust fall to road surface, air, not only can make full use of rainfall, save municipal water, and realize unpowered automatic sprinkling irrigation using the gravity potential of rainwater;In addition, since the system has collected part of rainwater with silt on the deck of overpass, the amount of silt flowing into municipal pipe network is reduced, and the pressure of municipal rainwater pipe network dredging is reduced.

Description

Technical Field

[0001] This invention relates to the field of rainwater utilization technology for urban overpasses, and in particular to a non-powered intelligent sprinkler irrigation and greening compensation system for urban overpasses. Background Technology

[0002] my country faces a severe water shortage, with per capita water resources amounting to only 2055 m³. 3 With only 25% of the global average, it is one of the 13 countries with the most scarce per capita water resources in the world. Moreover, with the acceleration of industrialization, pollutant emissions are increasing, and the reuse of freshwater resources is of great significance, especially in cities.

[0003] Rainwater, as the most important source of freshwater, is mostly discharged into rivers and eventually the sea through sewer pipes, resulting in insufficient utilization of this water resource. For example, rainwater runoff from urban overpasses is often directly discharged into the municipal water supply network through the bridge's storm drain pipes, eventually reaching sewage treatment plants or flowing into rivers. However, the green belts beneath the overpasses are shielded from rainwater and require separate irrigation during rainy days, creating a contradiction where rainwater cannot be utilized and additional municipal water is needed. Furthermore, rainwater flowing from overpasses into the municipal water supply network can cause overflows, leading to flooding and disrupting urban traffic and residents' daily lives. Excessive rainwater entering the municipal pipelines also increases the operational pressure on the network and sewage treatment plants, causing them to operate beyond their capacity and ultimately resulting in substandard wastewater discharge and further water pollution. Summary of the Invention

[0004] This invention provides a smart sprinkler irrigation system for greening under urban overpasses without power supply, which solves the problem that rainwater on the overpass surface cannot be utilized while the green belts under the bridge need additional water for irrigation.

[0005] A smart sprinkler irrigation and greening compensation system for rainwater in urban overpasses without power supply includes: a central controller, a rainwater collection and sedimentation tank installed on the bridge pier, a sprinkler system and a spraying system connected to the rainwater collection and sedimentation tank;

[0006] The upper part of the rainwater collection sedimentation tank has a sedimentation tank inlet, which is connected to the rainwater discharge pipe on the bridge deck; the lower side wall of the rainwater collection sedimentation tank has a sedimentation tank outlet, which is connected to a sedimentation tank outlet pipe through a first right-angle bend. The sedimentation tank outlet pipe is set along the vertical direction of the bridge pier, and a two-phase separator is installed inside the sedimentation tank outlet; the bottom of the rainwater collection sedimentation tank is set in a conical shape.

[0007] Both the sprinkler system and the spray system are connected to the effluent pipe of the sedimentation tank, with the sprinkler system located above the spray system. The spray heads of both systems are positioned above the green belt.

[0008] A filter assembly is installed outside the inlet of the sedimentation tank, and the filter assembly is connected to the rainwater drainage pipe on the bridge deck.

[0009] The beneficial effects of adopting the above technical solution are as follows: The sprinkler irrigation greening compensation system of the present invention collects rainwater from the overpass surface and, after filtration and sedimentation, uses it for sprinkler irrigation of the green belt under the bridge. This not only makes full use of rainwater but also reduces municipal water consumption. During periods of heavy rainfall, it can reduce the probability of urban flooding and alleviate the operational pressure on municipal pipe networks and sewage treatment plants. Because there is a certain height difference between the rainwater collection sedimentation tank and the sprinkler / spraying system, sprinkler irrigation can be achieved using water pressure without the need for additional power, thus saving energy and reducing emissions. In addition, the rainwater collection sedimentation tank with a conical bottom structure can concentrate sediments such as silt and sand on the conical bottom surface, accelerating the sedimentation rate and facilitating collection, which is beneficial for dredging and flushing. A two-phase separator is installed at the outlet of the sedimentation tank to separate silt and rainwater, reducing the amount of silt entering the sprinkler / spraying system.

[0010] Furthermore, the filter assembly includes a filter plate, a filter plate enclosure, and a waste discharge pipe. The filter plate is inclinedly disposed inside the filter plate enclosure and located above the inlet of the sedimentation tank. The waste discharge pipe is connected to the inside of the filter plate enclosure and located at the lower part of the filter plate enclosure.

[0011] The above technical solution has the following advantages: Filter plates are installed to intercept debris such as leaves and pebbles carried by rainwater in the bridge deck's rainwater collection pipes, preventing debris from entering the rainwater collection sedimentation tank and affecting its normal operation; filter plate enclosures are used to seal and protect the filter plates, providing an installation location while preventing hard debris such as pebbles from colliding with the filter plates and splashing, causing objects to fall from heights; a discharge pipe is connected below the filter plate enclosure, allowing debris to fall from the inclined groove of the filter plate enclosure into the discharge pipe for unified collection.

[0012] Furthermore, the rainwater collection sedimentation tank is equipped with an overflow channel inside, and an overflow outlet that runs through the inner and outer walls is provided on the vertical side wall of the rainwater collection sedimentation tank. A triangular weir is provided at the overflow channel, and the triangular weir and the overflow channel are located on the side away from the inlet of the sedimentation tank; a mud baffle is also provided on the triangular weir.

[0013] The beneficial effects of adopting the above technical solution are as follows: setting an overflow trough on the rainwater collection sedimentation tank can discharge excess rainwater and prevent the rainwater collection sedimentation tank from being overloaded. Setting a triangular weir at the overflow trough can make the overflow water flow more uniform and change the direction and speed of the rainwater flowing into the overflow trough. The mud baffle on the triangular weir is used to reduce the floating of silt in the tank, thereby reducing the amount of silt entering the overflow outlet.

[0014] Furthermore, the overflow outlet is connected to an overflow pipe, which is connected to the rainwater inlet of the ground road.

[0015] Furthermore, a sedimentation tank sludge discharge port is provided at the bottom of the rainwater collection sedimentation tank. The sedimentation tank sludge discharge port is connected to a sedimentation tank sludge discharge pipe through a second right-angle bend. A second solenoid valve and a water turbidity detector are installed on the sedimentation tank sludge discharge pipe. The second solenoid valve and the water turbidity detector are respectively connected to the central controller for communication.

[0016] The beneficial effects of adopting the above technical solution are as follows: the turbidity of the water in the sludge discharge pipe can be detected by the water turbidity detector, and then the data is fed back to the central controller. The central controller then instructs the second solenoid valve to close when the water flow becomes clear, which can not only drain the sludge in the rainwater collection sedimentation tank, but also avoid waste of the collected rainwater.

[0017] Furthermore, the spray head is connected to the water inlet pipe of the spray system, and the sprinkler head is connected to the water inlet pipe of the spray system. Both the water inlet pipe of the spray system and the water inlet pipe of the sprinkler system are equipped with a first solenoid valve, which is communicatively connected to the central controller.

[0018] The beneficial effects of adopting the above technical solution are as follows: the first solenoid valve can control the on / off state of the water flow and the water flow rate in the inlet pipe, so as to make adaptive use according to the water storage in the rainwater collection sedimentation tank and save water resources.

[0019] Furthermore, the inlet pipes of both the sprinkler system and the spray system are connected to the outlet pipe of the sedimentation tank via a T-joint.

[0020] Furthermore, an infrared level gauge is installed on the rainwater collection sedimentation tank, and the infrared level gauge is connected to the central controller.

[0021] The beneficial effects of adopting the above technical solution are as follows: the water level in the rainwater collection sedimentation tank can be detected in real time by the infrared level gauge, providing a basis and reference for the decision instructions to be made by the central controller.

[0022] Furthermore, a drop plate is installed on the inner side of the sedimentation tank inlet.

[0023] The beneficial effects of adopting the above technical solution are as follows: the drop plate is used to change the direction of rainwater flow into the rainwater collection sedimentation tank and reduce the water flow velocity, thereby reducing the disturbance of rainwater to the water in the rainwater collection sedimentation tank and improving the sedimentation efficiency.

[0024] Furthermore, the top of the rainwater collection sedimentation tank is equipped with an operable sedimentation tank cover.

[0025] The beneficial effects of adopting the above technical solution are as follows: setting a sedimentation tank cover on the top of the rainwater collection sedimentation tank allows personnel to easily enter the sedimentation tank for maintenance, inspection and dredging operations, ensuring the normal use of the rainwater collection sedimentation tank.

[0026] The present invention has the following beneficial effects:

[0027] (1) The system of the present invention uses rainwater from the overpass to spray irrigation on the green belt plants, which can not only make full use of rainwater and save municipal water, but also reduce road dust.

[0028] (2) The system of the present invention collects some rainwater containing mud and sand on the ground, which will reduce the amount of rainwater that directly enters the municipal rainwater pipe network, thereby reducing the amount of mud and sand flowing into the municipal pipe network, reducing the pressure on the municipal rainwater pipe network, the dredging pressure and reducing the initial rainwater treatment load of the sewage treatment plant; at the same time, during the rainy season, it reduces the surface rainwater runoff and the amount of rainwater in the municipal pipe network, which can reduce the probability of urban flooding to a certain extent and give full play to the sponge city effect.

[0029] (3) The rainwater collection sedimentation tank of the present invention has an elevation difference with the sprinkler system and the spraying system. The gravitational potential energy of the rainwater accumulated in the tank can be used to atomize the discharged rainwater, making full use of the collected rainwater and realizing automatic sprinkler irrigation without power.

[0030] (4) The system of the present invention is equipped with components such as a first solenoid valve, a second solenoid valve, a water turbidity detector, and an infrared liquid level gauge. All components work together to achieve automated sprinkler irrigation while saving water resources.

[0031] (5) The system of the present invention is equipped with a filter component to reduce the amount of debris entering the rainwater collection sedimentation tank, avoid clogging of the spray system and the sprinkler system, and enable the entire system to operate continuously.

[0032] (6) The rainwater collection sedimentation tank of the present invention is equipped with a drop plate at the inlet of the sedimentation tank. The drop plate changes the direction of the water flow into the tank and reduces the flow velocity, thereby reducing the disturbance to the rainwater in the tank and facilitating the sedimentation of silt in the tank. A baffle plate is installed at the overflow outlet to reduce the upward movement of silt in the tank, thereby reducing the amount of silt entering the municipal pipe network. At the same time, a two-phase separator is installed at the outlet of the sedimentation tank to separate the silt and rainwater, preventing silt from entering the sprinkler system and sprinkler irrigation system and ensuring the sustainable operation of the system. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the front cross-sectional structure of the sprinkler irrigation greening compensation system in an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of the main structure of the sprinkler irrigation greening compensation system in an embodiment of the present invention;

[0035] Figure 3 This is a top sectional view of the sprinkler irrigation greening compensation system in an embodiment of the present invention.

[0036] Figure 4 This is a side sectional view of the sprinkler irrigation greening compensation system in an embodiment of the present invention.

[0037] Figure 5 This is a top view schematic diagram of the multi-row pipe arrangement of the sprinkler system in an embodiment of the present invention;

[0038] Figure 6 This is a top view showing the positional relationship between the filter plate and the filter plate enclosure in an embodiment of the present invention;

[0039] Figure 7 This is a front sectional view of the positional relationship between the filter plate and the filter plate enclosure in an embodiment of the present invention;

[0040] Figure 8 This is a side sectional view of the positional relationship between the filter plate and the filter plate enclosure in an embodiment of the present invention.

[0041] In the diagram: 1-Bridge pier; 2-Rainwater collection and sedimentation tank; 3-Rainwater discharge pipe from bridge deck; 4-Sedimentation tank inlet; 5-Sedimentation tank cover; 6-Overflow trough; 7-Triangular weir; 8-Overflow outlet; 9-Overflow outlet pipe; 10-Sedimentation tank outlet; 11-Sedimentation tank outlet pipe; 12-First right-angle bend; 13-First solenoid valve; 14-Sprinkler system inlet pipe; 15-Sprinkler head; 16-Sprinkler system inlet pipe; 17-Sprinkler head; 18-Sedimentation tank sludge discharge port; 19-Sedimentation tank sludge discharge pipe; 20-Second right-angle bend; 21-Second solenoid valve; 22-T-connector; 23-Filter plate; 24-Filter plate enclosure; 25-Miscellaneous waste pipe; 26-Two-phase separator; 27-Mudguard; 28-Waterfall. Detailed Implementation

[0042] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0043] refer to Figures 1 to 4 The present invention provides a smart sprinkler irrigation and greening compensation system for rainwater in urban overpasses without power supply, comprising: a rainwater collection and sedimentation tank 2 installed on the bridge pier 1, a sprinkler system and a spraying system connected to the rainwater collection and sedimentation tank 2, a filter assembly installed above the rainwater collection and sedimentation tank 2, and a central controller.

[0044] The rainwater collection and sedimentation tank 2 is used to collect and store rainwater and settle sediment such as silt. The rainwater collection and sedimentation tank 2 is installed on the bridge pier 1 of the overpass and is significantly higher than the ground level, giving the rainwater inside a large gravitational potential energy. The rainwater collection and sedimentation tank 2 can be box-shaped or cylindrical, and can be made of high-strength synthetic plastic or cast concrete. As an example, the rainwater collection and sedimentation tank 2 is a rectangular box-shaped structure, with its bottom mounted on a support frame. The support frame is fixed to the bridge pier 1 by expansion bolts and is welded from angle steel.

[0045] The top of the rainwater collection and sedimentation tank 2 is equipped with a sedimentation tank inlet 4, which is connected to the bridge deck rainwater discharge pipe 3 or to the bridge deck rainwater inlet via the bridge deck rainwater collection pipe, discharging the rainwater runoff collected on the overpass surface into the rainwater collection and sedimentation tank 2. The bridge deck rainwater collection pipe is made of PVC or HDPE material, and the pipe diameter, length, and size of the rainwater collection and sedimentation tank 2 are designed based on a comprehensive consideration of factors such as the local rainfall intensity, bridge deck catchment area, and overpass surface runoff.

[0046] The top of the rainwater collection sedimentation tank 2 is equipped with an openable sedimentation tank cover 5. The sedimentation tank cover 5 is generally made of synthetic plastic or stainless steel and is connected to the rainwater collection sedimentation tank 2 by hinges or hinge seats. When it is necessary to inspect or clean the rainwater collection sedimentation tank 5, the sedimentation tank cover 5 can be opened and the staff can enter it to carry out the work.

[0047] To prevent stones and other debris from entering the rainwater collection and sedimentation tank 2, a filter assembly is installed outside the sedimentation tank inlet 4. The filter assembly is connected to the bridge deck rainwater discharge pipe 3 or the bridge deck rainwater collection pipe. The filter assembly can use a flexible filter screen or a rigid filter plate.

[0048] As an example, see reference Figures 6 to 8 The filter assembly includes a filter plate 23, a filter plate enclosure 24, and a debris discharge pipe 25. The filter plate 23 is made of multiple round steel bars welded side by side, with gaps between adjacent bars to allow rainwater to pass through and filter out debris. The filter plate 23 is inclined inside the filter plate enclosure 24. When debris hits the filter plate 23, it slides down into the inclined groove below the filter plate enclosure 24 due to the inclination of the filter plate 23. The upper part of the filter plate enclosure 24 is a removable top plate for easy installation and replacement of the filter plate 23. The top plate is connected to the bridge deck rainwater discharge pipe 3 or the bridge deck rainwater collection pipe. The filter plate 23 is located below the bridge deck rainwater discharge pipe 3 or the bridge deck rainwater collection pipe, and above the sedimentation tank inlet 4. The filter plate enclosure 24 also prevents hard objects such as stones from splashing after colliding with the filter plate 23, thus avoiding falling objects from height. The bottom of the inclined groove of the filter plate enclosure 24 is connected to the discharge pipe 25, which is located at the lower part of the filter plate enclosure 24 and is used to guide and collect debris inside the filter plate enclosure 24. To facilitate unified collection of debris, a stainless steel perforated trash can is placed below the discharge pipe 25, and the outlet end of the discharge pipe 25 is about one meter above the ground. Alternatively, the outlet end of the discharge pipe 25 can be blocked, and the debris can be discharged uniformly when the garbage truck passes by. By installing a filter assembly outside the inlet 4 of the sedimentation tank, the amount of debris entering the rainwater collection sedimentation tank 2 can be effectively reduced, ensuring the normal use of the rainwater collection sedimentation tank 2.

[0049] Refer again Figure 4 The inner side of the inlet 4 of the sedimentation tank is equipped with a drop plate 28. The drop plate 28 consists of two long strips with opposite inclinations and overlapping parts in the vertical direction. They are respectively connected to the vertical side wall of the rainwater collection sedimentation tank 2 and the bottom of the top cover. When rainwater from the bridge deck rainwater discharge pipe 3 or the bridge deck rainwater collection pipe is discharged into the rainwater collection sedimentation tank 2, it must first pass through the two drop plates 28. The drop plates 28 reduce the flow velocity and change the direction of the water flow, reduce the disturbance of the water flow to the rainwater collection sedimentation tank 2, reduce the disturbance of the rainwater in the tank, accelerate the sedimentation efficiency of the silt in the rainwater in the tank, and at the same time improve the service life of the rainwater collection sedimentation tank 2 to a certain extent.

[0050] The bottom of the rainwater collection sedimentation tank 2 is equipped with a sedimentation tank sludge discharge port 18, which is connected to a second right-angle bend 20. The second right-angle bend 20 is connected to a sedimentation tank sludge discharge pipe 19, which is equipped with a second solenoid valve 21. After the rainwater in the rainwater collection sedimentation tank 2 has undergone sedimentation, water-insoluble suspended solids such as silt are discharged from the sedimentation tank sludge discharge pipe 19. The sedimentation tank sludge discharge pipe 19 is made of PVC or HDPE material, and its diameter is determined according to the size of the rainwater collection sedimentation tank 2. The sludge discharge of the rainwater collection sedimentation tank 2 can be carried out simultaneously with the dredging of municipal intercepting wells, municipal sewage wells, and municipal pipelines. The second solenoid valve 21 installed on the sedimentation tank sludge discharge pipe 19 is opened during sludge discharge, and municipal dredging vehicles are used to suck out the sediment at the bottom of the rainwater collection sedimentation tank 2 through the sedimentation tank sludge discharge pipe 19. The clarity of the water exiting the sedimentation tank sludge discharge pipe 19 is used as the standard for sludge discharge.

[0051] Preferably, a water turbidity detector is installed on the sludge discharge pipe 19 of the sedimentation tank. The water turbidity detector is connected to the central controller and is used to detect whether the sediment at the bottom of the rainwater collection sedimentation tank 2 has been completely discharged. When the turbidity of the effluent decreases, the sludge discharge is stopped to avoid excessive loss of the collected rainwater.

[0052] As an above-ground facility, the rainwater collection sedimentation tank 2 is much easier to remove sludge than the underground municipal pipe network. It allows some of the rainwater containing silt to settle on the ground, thereby reducing the amount of silt entering the municipal rainwater pipe network and reducing the pressure on the municipal rainwater pipe network to be cleaned. Moreover, the sludge removal from the rainwater collection sedimentation tank 2 is carried out simultaneously with the cleaning of the municipal pipe network, without the need for separate manual and mechanical processing, thus achieving the goal of low-cost sludge removal from the rainwater collection sedimentation tank 2.

[0053] Preferably, the bottom of the rainwater collection sedimentation tank 2 is set in a cone shape. The mud and other debris in the rainwater in the tank settles under the action of gravity, and the cone-shaped bottom of the tank can collect the debris together, thereby accelerating the sedimentation speed and sludge discharge efficiency.

[0054] The rainwater collection sedimentation tank 2 has an overflow trough 6 inside. The overflow trough 6 is designed to fit the upper wall of the rainwater collection sedimentation tank 2 and run along the length of the tank. The length of the overflow trough 6 is the same as the length of the tank, and the width and depth are determined according to the size of the rainwater collection sedimentation tank 2. The overflow trough 6 and the rainwater collection sedimentation tank 2 can be designed as an integral structure, made of the same material as the rainwater collection sedimentation tank 2. Its position is offset from the position of the sedimentation tank inlet 4 to prevent rainwater from being discharged directly from the overflow trough 6. A triangular weir 7 is set at the overflow trough 6. The triangular weir 7 can make the overflow water in the tank more even, change the direction and speed of the rainwater flowing into the overflow trough 7, and can also intercept floating debris into the overflow trough 6. The triangular weir 7 is a plate with a serrated top. The rainwater collection sedimentation tank 2 has an overflow outlet 8 that runs through the inner and outer walls on its vertical side wall. The overflow outlet 8 is located at the end of the overflow channel 6 and is connected to an overflow pipe 9, which is connected to the rainwater inlet of the ground road. When the amount of water entering the rainwater collection sedimentation tank 2 exceeds its maximum storage capacity, the excess rainwater flows through the overflow channel 6 and into the municipal rainwater pipe network along the overflow pipe 9, thereby discharging the excess rainwater and ensuring the normal use of the rainwater collection sedimentation tank 2.

[0055] Preferably, a mudguard 27 is installed on the triangular weir 7. The mudguard 27 can reduce the floating of silt and reduce the amount of silt entering the overflow pipe 9, thereby reducing the amount of silt entering the municipal stormwater pipe network.

[0056] A sedimentation tank outlet 10 is provided on the lower side wall of the rainwater collection sedimentation tank 2. The sedimentation tank outlet 10 is connected to the sedimentation tank outlet pipe 11 through a first right-angle bend 12. The sedimentation tank outlet pipe 11 is set along the vertical direction of the bridge pier 1. As an example, the distance between the sedimentation tank outlet 10 and the bottom of the tank is one-quarter of the tank height, which ensures that there is enough clarified rainwater available for use, while preventing silt from the bottom of the tank from entering the sedimentation tank outlet pipe 11.

[0057] To prevent the sprinkler system and spray system from being clogged by silt, a two-phase separator 26 is installed inside the outlet 10 of the sedimentation tank to separate rainwater and silt, thereby reducing the silt content entering the sprinkler system and ensuring the normal operation of the entire system.

[0058] Both the sprinkler system and the spraying system are connected to the sedimentation tank outlet pipe 11, with the sprinkler system located above the spraying system. The sprinkler system inlet pipe 14 and the spraying system inlet pipe 16 are both connected to the sedimentation tank outlet pipe 11 via a T-joint 22. Sprinkler heads 15 are evenly distributed on the sprinkler system inlet pipe 14, and sprinkler heads 17 are evenly distributed on the spraying system inlet pipe 16. Both the sprinkler heads 15 and 17 are positioned above the green belt. Rainwater entering the sprinkler / spraying system is sprayed out through the sprinkler heads 15 and 17. Due to the height difference between the sprinkler / spraying system and the rainwater collection sedimentation tank 2, the resulting pressure atomizes the rainwater from the sprinkler heads 15 and 17. The entire sprinkler irrigation process, including watering the green belt plants and reducing dust on the road surface and in the air, is completed automatically without power.

[0059] Both the sprinkler system inlet pipe 14 and the sprinkler system inlet pipe 16 are equipped with a first solenoid valve 13. The first solenoid valve 13 is connected to the streetlights around the overpass or other nearby municipal power lines by wire. The first solenoid valve 13 can automatically control the flow of rainwater in the sprinkler system inlet pipe 14 and the sprinkler system inlet pipe 16. The first solenoid valve 13 controls the flow of rainwater in the pipe through a time controller, thereby controlling the spraying time of the sprinkler system and the sprinkler system. The specific spraying and spraying duration and interval can be designed according to the local climate conditions and the size of the rainwater collection and sedimentation tank 2.

[0060] refer to Figure 5 The sprinkler system inlet pipe 14 is arranged parallel to the ground. The specific height of the sprinkler system inlet pipe 14 above the ground is determined according to the specific geographical conditions under the overpass. Its height cannot be too high, otherwise the outlet pressure of the rainwater collection sedimentation tank 2 will not be sufficient to support the sprinkler atomization effect; nor can it be too low, otherwise the sprinkler atomization will have a poor dust suppression effect on the road surface and air. The sprinkler system inlet pipe 14 uses PVC or HDPE material, and its pipe diameter is adapted to match the outlet pipe 11 of the sedimentation tank. The number and length of the sprinkler system inlet pipe 14 are determined according to the green area and road width under the overpass. If the green belt and road surface area are large, multiple sprinkler pipes are installed in parallel to spray the green belt and suppress dust on the road surface and air. If the green belt and road surface are long, they can be connected to the sprinkler system of the adjacent rainwater collection sedimentation tank 2 to form a whole, in order to maintain the stability of the sprinkler pipes.

[0061] Similarly, the water inlet pipe 16 of the sprinkler system is arranged parallel to the ground. The specific height of the water inlet pipe 16 above the ground is determined according to the specific geographical conditions under the overpass. Its height cannot be too high, otherwise it will affect pedestrian traffic; nor can it be too low, otherwise the sprinkler heads 17 will easily be blocked by ground debris. The diameter of the water inlet pipe 16 is determined according to the size of the sedimentation tank outlet pipe 11 and the green area. The number and length of the water inlet pipes 14 of the sprinkler system are determined according to the green area under the overpass. If the green area is large, multiple sprinkler pipes are installed in parallel to spray the greenery; if the green area is long, it can be connected to the sprinkler system of the adjacent rainwater collection sedimentation tank 2 to form a whole. If the sprinkler pipe is long, ground supports are installed to maintain the stability of the pipe.

[0062] As an example, the sedimentation tank outlet pipe 11 is connected to the sprinkler system inlet pipe 14 via a T-joint 22 at a height of two meters above the ground. The sedimentation tank outlet pipe 11 is connected to the sprinkler system inlet pipe 16 via another T-joint 22 at a height of twenty centimeters above the ground. The other end of the T-joint 22 in the sprinkler system is sealed and serves as a pipe inspection port.

[0063] Preferably, an infrared level gauge is installed on the inner top of the rainwater collection sedimentation tank 2. The level gauge works in conjunction with the first solenoid valve 13 and the second solenoid valve 21. The level gauge measures the water volume information of the rainwater collection sedimentation tank 2 and transmits it to the central controller. The central controller then controls the first solenoid valve 13 to spray different amounts of water according to the different water levels in the rainwater collection sedimentation tank 2, thereby improving the utilization efficiency of rainwater in the tank. When it is necessary to remove sludge from the tank, the central controller instructs the second solenoid valve 21 to open for sludge removal. At the same time, the central controller uses the data dynamically detected in real time by the water turbidity detector to determine whether the sludge has been completely removed. When the sludge content in the water reaches the preset standard, the central controller controls the second solenoid valve 21 to close.

[0064] The central controller uses a programmable chip for function programming and communicates with the first solenoid valve 13, the second solenoid valve 21, the water turbidity detector, and the infrared level gauge. It is used to receive signals and data from the water turbidity detector and the infrared level gauge, and to issue appropriate instructions to the first solenoid valve 13 and the second solenoid valve 21 after judging based on the signals and data. The chip model used by the central controller can be an STM32 series. The power transmission line of the central controller is connected to the street lights around the overpass or the nearby municipal power lines.

[0065] The sprinkler irrigation and greening compensation system of this invention collects rainwater runoff from overpasses, filters it, and guides it into a rainwater collection and sedimentation tank 2. Once the rainwater collection and sedimentation tank 2 is full, excess rainwater flows through an overflow trough 6 into an overflow outlet pipe 9, which connects to a ground-level rainwater inlet. The overflowing rainwater from the rainwater collection and sedimentation tank 2 ultimately flows into the municipal rainwater pipe network. After preliminary sedimentation, the relatively clear rainwater at the top of the rainwater collection and sedimentation tank 2 flows out through the sedimentation tank outlet pipe 11. The sedimentation tank outlet pipe 11 is connected to the sprinkler system inlet pipe 14 / sprinkler system inlet pipe 16 via a tee. Pressurized rainwater is atomized and sprayed from sprinkler heads 15 and 17 to irrigate the green belt plants and suppress dust on the road surface and in the air. The sediment and debris settled at the bottom of the rainwater collection and sedimentation tank 2 are periodically discharged through the sedimentation tank sludge discharge pipe 19.

[0066] The above description is merely a preferred embodiment of the present invention, and does not represent all possible forms of the present invention. The scope of protection of the present invention is not limited to such specific statements and embodiments. Various other modifications and improvements can be made based on the technical teachings disclosed in the present invention without departing from the essence of the present invention, and these modifications and improvements are still within the scope of protection of the present invention.

Claims

1. A smart sprinkler irrigation and greening compensation system for non-powered rainwater drainage in urban overpasses, characterized in that, include: The central controller, the rainwater collection and sedimentation tank (2) set on the bridge pier (1), the sprinkler system and the spraying system connected to the rainwater collection and sedimentation tank (2); The upper part of the rainwater collection sedimentation tank (2) is provided with a sedimentation tank inlet (4), which is connected to the bridge deck rainwater discharge pipe (3); the lower side wall of the rainwater collection sedimentation tank (2) is provided with a sedimentation tank outlet (10), which is connected to a sedimentation tank outlet pipe (11) through a first right angle bend (12). The sedimentation tank outlet pipe (11) is set along the vertical direction of the bridge pier (1), and a two-phase separator (26) is provided on the inner side of the sedimentation tank outlet (10); the bottom of the rainwater collection sedimentation tank (2) is set as a cone. Both the spray system and the sprinkler system are connected to the sedimentation tank outlet pipe (11), and the spray system is located above the sprinkler system. The spray head (15) of the spray system and the sprinkler head (17) of the sprinkler system are both set above the green belt. A filter assembly is installed outside the inlet (4) of the sedimentation tank, and the filter assembly is connected to the rainwater discharge pipe (3) of the bridge deck; The filter assembly includes a filter plate (23), a filter plate enclosure (24), and a waste discharge pipe (25). The filter plate (23) is inclinedly arranged inside the filter plate enclosure (24) and located above the sedimentation tank inlet (4). The waste discharge pipe (25) is connected to the inside of the filter plate enclosure (24) and located at the lower part of the filter plate enclosure (24). The bottom of the rainwater collection sedimentation tank (2) is provided with a sedimentation tank sludge discharge port (18). The sedimentation tank sludge discharge port (18) is connected to a sedimentation tank sludge discharge pipe (19) through a second right-angle bend (20). A second solenoid valve (21) and a water turbidity detector are provided on the sedimentation tank sludge discharge pipe (19). The second solenoid valve (21) and the water turbidity detector are respectively connected to the central controller.

2. The smart sprinkler irrigation and greening compensation system for urban overpasses without power supply as described in claim 1, characterized in that, The rainwater collection sedimentation tank (2) is provided with an overflow trough (6) inside. An overflow outlet (8) that runs through the inner and outer walls is provided on the vertical side wall of the rainwater collection sedimentation tank (2). A triangular weir (7) is provided at the overflow trough (6). The triangular weir (7) and the overflow trough (6) are located on the side away from the sedimentation tank inlet (4). A mud baffle (27) is also provided on the triangular weir (7).

3. The smart sprinkler irrigation and greening compensation system for urban overpasses without power supply as described in claim 2, characterized in that, The overflow outlet (8) is connected to an overflow pipe (9), which is connected to the rainwater inlet of the ground road.

4. The intelligent sprinkler irrigation and greening compensation system for urban overpasses without power supply as described in claim 1, characterized in that, The spray head (15) is connected to the water inlet pipe (14) of the spray system, and the spray head (17) is connected to the water inlet pipe (16) of the spray system. Both the water inlet pipe (14) and the water inlet pipe (16) of the spray system are equipped with a first solenoid valve (13), and the first solenoid valve (13) is communicatively connected to the central controller.

5. The smart sprinkler irrigation and greening compensation system for urban overpasses without power supply as described in claim 4, characterized in that, The water inlet pipe (14) of the spray system and the water inlet pipe (16) of the spray system are both connected to the water outlet pipe (11) of the sedimentation tank through a three-way connector (22).

6. The intelligent sprinkler irrigation and greening compensation system for urban overpasses without power supply as described in claim 1, characterized in that, An infrared level gauge is installed on the rainwater collection sedimentation tank (2), and the infrared level gauge is connected to the central controller.

7. The urban overpass non-powered intelligent sprinkler irrigation and greening compensation system according to any one of claims 1 to 6, characterized in that, A drop plate (28) is provided on the inner side of the sedimentation tank inlet (4).

8. The intelligent sprinkler irrigation and greening compensation system for urban overpasses without power supply as described in claim 7, characterized in that, The top of the rainwater collection sedimentation tank (2) is equipped with an openable sedimentation tank cover (5).

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