Automatic sprinkling irrigation device utilizing rainwater of overpass

Abstract

The utility model relates to the technical field of urban overpass bridge floor rainwater utilization, and discloses an automatic sprinkling irrigation device utilizing overpass rainwater, which comprises a central controller, a rainwater collecting and settling pond, a spraying system and a spraying system, the rainwater collecting and settling pond is communicated with a bridge floor rainwater discharge pipe, and a settling pond water outlet pipe is connected to the rainwater collecting and settling pond; the spraying system and the spraying system are both connected to a water outlet pipe of the sedimentation tank, and a spraying head of the spraying system and a spraying head of the spraying system are both arranged above the green belt. According to the device disclosed by the utility model, rainwater on the bridge surface of the flyover is used for sprinkling irrigation of green belt plants and dust reduction of road surfaces and air, so that rainfall and rainwater can be fully utilized, municipal water is saved, and gravitational potential energy of the rainwater is used for realizing unpowered automatic sprinkling irrigation; in addition, due to the fact that the device collects part of rainwater with silt on the bridge surface of the flyover, the amount of silt flowing into a municipal pipe network is reduced, and the desilting pressure of the municipal rainwater pipe network is relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of rainwater utilization on bridge decks of urban flyovers, in particular to an automatic sprinkler irrigation device utilizing rainwater from flyovers. Background Art

[0002] my country is seriously short of water resources. The per capita water resources in my country are 2055m 3 , only 25% of the global average, making it one of the 13 countries with the most scarce per capita water resources in the world. With the acceleration of industrialization, pollutant emissions have increased, and the reuse of fresh water resources, especially in cities, is of great significance.

[0003] As the most important source of fresh water, most of the rainwater is discharged into rivers through sewer pipes and then flows into the sea. This part of water resources cannot be fully utilized. For example, the rainwater runoff formed by the bridge deck of the city overpass is mostly discharged directly into the municipal pipe network through the bridge deck rainwater drainage pipe, and finally enters the sewage treatment plant or is discharged into the river. However, the green belt under the overpass is blocked from being irrigated by rainwater. It is even necessary to irrigate the green belt under the bridge with water on rainy days, forming a contradictory phenomenon that rainwater cannot be used and additional municipal water is needed. In addition, after the rainwater on the overpass bridge deck flows into the municipal pipe network, it may cause the municipal pipe network to overflow, forming waterlogging on the road surface, affecting urban traffic and the normal life of residents. Excessive rainwater entering the municipal pipe will increase the operating pressure of the municipal pipe network and the treatment pressure of the sewage treatment plant, causing the sewage treatment plant to overload, and ultimately leading to substandard sewage discharge and more water resources being polluted. Utility Model Content

[0004] The utility model provides an automatic sprinkler irrigation device utilizing rainwater from an overpass, which solves the problem that rainwater on the overpass deck cannot be utilized while the green belt under the bridge needs additional water for irrigation.

[0005] An automatic sprinkler irrigation device utilizing rainwater from an overpass, comprising: a central controller, a rainwater collection and sedimentation tank disposed on a bridge pier, a sprinkler system and a spraying system connected to the rainwater collection and sedimentation tank;

[0006] A sedimentation tank water inlet is provided at the upper part of the rainwater collection sedimentation tank, and the sedimentation tank water inlet is connected to the bridge deck rainwater discharge pipe; a sedimentation tank water outlet is provided on the lower side wall of the rainwater collection sedimentation tank, and the sedimentation tank water outlet is connected to the sedimentation tank water outlet pipe through the first right angle elbow, and the sedimentation tank water outlet pipe is arranged along the vertical direction of the bridge pier, and a two-phase separator is arranged inside the sedimentation tank water outlet; the bottom of the rainwater collection sedimentation tank is arranged in a cone shape;

[0007] The sprinkler system and the spraying system are both connected to the water outlet pipe of the sedimentation tank, and the sprinkler system is located at the upper part of the spraying system. The sprinkler head of the sprinkler system and the spraying head of the spraying system are both arranged above the green belt;

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

[0009] The above technical solution has the following beneficial effects: the device of the utility model collects rainwater on the bridge deck of the overpass and uses it for spraying and irrigating the green belt under the bridge after filtering and settling, which can fully utilize rainwater and reduce municipal water use. When the rainfall is heavy, it can reduce the probability of urban flooding, reduce the operating pressure of the municipal pipe network and the treatment pressure of the sewage treatment plant; because there is a certain height difference between the rainwater collection sedimentation tank and the spraying system and the sprinkler system, the spray irrigation can be achieved by using water pressure without the participation of additional power, thus saving energy and reducing emissions. In addition, the rainwater collection sedimentation tank with a conical structure at the bottom can concentrate sediments such as silt on the bottom surface of the cone, accelerate the sedimentation rate of silt and facilitate concentration, which is conducive to dredging and flushing; and a two-phase separator is set at the outlet of the sedimentation tank to separate silt and rainwater, reducing the amount of silt entering the sprinkler system and the sprinkler system.

[0010] Furthermore, the filter assembly includes a filter plate, a filter plate enclosure and a debris discharge pipe. The filter plate is tiltedly arranged inside the filter plate enclosure and located above the water inlet of the sedimentation tank. The debris discharge pipe is connected to the inside of the filter plate enclosure and located at the bottom of the filter plate enclosure.

[0011] The above technical solution has the beneficial effects: a filter plate is set to intercept leaves, stones and other garbage and debris carried by rainwater in the bridge deck rainwater collection pipe, to prevent the debris from entering the rainwater collection sedimentation tank and affecting the normal operation of the rainwater collection sedimentation tank; the filter plate enclosure is used to seal and protect the filter plate, to provide an installation position for the filter plate, and to prevent hard debris such as stones from colliding with the filter plate and splashing, causing falling objects from high altitude; a debris discharge pipe is connected to the bottom of the filter plate enclosure, and debris falls into the debris discharge pipe from the inclined groove of the filter plate enclosure for unified collection.

[0012] Furthermore, an overflow trough is arranged inside the rainwater collection sedimentation tank, an overflow outlet penetrating the inner and outer walls is arranged on the vertical side wall of the rainwater collection sedimentation tank, a triangular weir is arranged at the overflow trough, and the triangular weir and the overflow trough are located on the side away from the water inlet of the sedimentation tank; a mud guard is also arranged on the triangular weir.

[0013] The above technical solution has the beneficial effects: an overflow trough is set on the rainwater collection sedimentation tank to discharge excess rainwater and prevent the rainwater collection sedimentation tank from being overloaded; a triangular weir is set at the overflow trough to make the overflow water flow more uniform and change the water flow direction and speed of the rainwater entering the overflow trough; the mud guard on the triangular weir is used to reduce the floating of sediment in the pool, thereby reducing the amount of sediment entering the overflow outlet.

[0014] Furthermore, the overflow outlet is connected to an overflow outlet pipe, and the overflow outlet pipe is connected to a ground road rainwater outlet.

[0015] Furthermore, a sedimentation tank mud discharge outlet is arranged at the bottom of the rainwater collection sedimentation tank, and the sedimentation tank mud discharge outlet is connected to the sedimentation tank mud discharge pipe through a second right-angle elbow pipe. A second solenoid valve and a water turbidity detector are arranged on the sedimentation tank mud discharge pipe. The second solenoid valve and the water turbidity detector are respectively communicated with the central controller.

[0016] The above technical solution has the beneficial effect that the turbidity of water in the mud discharge pipe can be detected by a water turbidity detector, and the data is then fed back to the central controller, which instructs the second solenoid valve to close when the water flow becomes clear, thereby draining the silt in the rainwater collection sedimentation tank without causing waste of the collected rainwater.

[0017] Furthermore, the sprinkler head is connected to the water inlet pipe of the sprinkler system, the sprinkler head is connected to the water inlet pipe of the spraying system, the sprinkler system water inlet pipe and the spraying system water inlet pipe are both provided with a first solenoid valve, and the first solenoid valve is communicatively connected to the central controller.

[0018] The above technical solution has the beneficial effect that the first solenoid valve can control the on-off of the water flow and the amount of water flow in the water inlet pipe, so as to facilitate adaptive use according to the water storage capacity in the rainwater collection sedimentation tank, thereby saving water resources.

[0019] Furthermore, the water inlet pipe of the sprinkler system and the water inlet pipe of the spray system are both connected to the water outlet pipe of the sedimentation tank through a three-way joint.

[0020] Furthermore, an infrared liquid level meter is provided on the rainwater collection sedimentation tank, and the infrared liquid level meter is communicatively connected with the central controller.

[0021] The above technical solution has the beneficial effect that the water level in the rainwater collection sedimentation tank can be detected in real time by the infrared liquid level meter, providing a basis and reference for the decision instructions to be made by the central controller.

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

[0023] The above technical solution has the beneficial effects that the drop plate is used to change the flow direction of rainwater entering the rainwater collection sedimentation tank and reduce the water flow speed, reduce the disturbance of rainwater to the water body in the rainwater collection sedimentation tank, and improve the sedimentation efficiency.

[0024] Furthermore, a switchable sedimentation tank cover is provided on the top of the rainwater collection sedimentation tank.

[0025] The above technical solution has the beneficial effect that a sedimentation tank cover is arranged on the top of the rainwater collection sedimentation tank to facilitate personnel to enter the sedimentation tank for maintenance inspection and dredging operations, thereby ensuring the normal use of the rainwater collection sedimentation tank.

[0026] The utility model has the following beneficial effects:

[0027] (1) The device of the utility model utilizes rainwater on the bridge deck of the flyover to sprinkle water on the plants in the green belt, which can not only make full use of rainfall and rainwater and save municipal water, but also reduce dust on the road.

[0028] (2) The device of the utility model collects a portion of rainwater with mud and debris on the ground, and the amount of rainwater directly entering the municipal rainwater pipe network will be reduced, thereby reducing the amount of mud and sand flowing into the municipal pipe network, thereby reducing the pressure on the municipal rainwater pipe network, dredging pressure and reducing the initial rainwater treatment load of the sewage treatment plant; at the same time, during the rainy season, the ground rainwater runoff and the amount of rainwater in the municipal pipe network are reduced, which can reduce the probability of urban floods to a certain extent and fully exert the effect of the sponge city.

[0029] (3) There is a height difference between the rainwater collection sedimentation tank and the sprinkler system and the spraying system of the utility model. The gravitational potential energy of the rainwater accumulated in the tank can be used to atomize the discharged rainwater, thereby making full use of the collected rainwater and realizing unpowered automatic sprinkler irrigation.

[0030] (4) The device of the utility model realizes automatic sprinkler irrigation while saving water resources by disposing components such as a first solenoid valve, a second solenoid valve, a water turbidity detector, and an infrared liquid level meter, and each component works in conjunction with each other.

[0031] (5) The device of the utility model is provided with a filtering assembly to reduce the amount of debris that enters the rainwater collection sedimentation tank, thereby avoiding blockage of the sprinkler system and the spraying system, and allowing the entire device to operate continuously.

[0032] (6) The rainwater collection sedimentation tank of the utility model is provided with a drop plate at the water inlet of the sedimentation tank. The drop plate changes the direction of the water flow entering the tank and reduces the flow rate, thereby reducing the disturbance of rainwater in the tank and facilitating the sedimentation of silt in the water body in the tank. A mud guard is provided at the overflow outlet to reduce the upturning 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 provided at the outlet of the sedimentation tank to separate silt and rainwater, thereby preventing silt from entering the spray system and sprinkler irrigation system, and ensuring the sustainable operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the front cross-sectional structure of the device in the embodiment of the utility model;

[0034] Figure 2 It is a schematic diagram of the main structure of the device in the embodiment of the utility model;

[0035] Figure 3 It is a schematic diagram of a top view and cross-section structure of a device in an embodiment of the utility model;

[0036] Figure 4 It is a side cross-sectional structural schematic diagram of the device in the embodiment of the utility model;

[0037] Figure 5 It is a top view schematic diagram of the arrangement of multiple rows of pipes of the spray system in an embodiment of the utility model;

[0038] Figure 6 A top view of the positional relationship between the filter plate and the filter plate enclosure in an embodiment of the utility model;

[0039] Figure 7 It is a schematic diagram of the front and cross-section view of the positional relationship between the filter plate and the filter plate enclosure in the embodiment of the utility model;

[0040] Figure 8 It is a side cross-sectional schematic diagram of the positional relationship between the filter plate and the filter plate enclosure in an embodiment of the utility model.

[0041] In the figure: 1-bridge pier; 2-rainwater collection sedimentation tank; 3-bridge deck rainwater discharge pipe; 4-sedimentation tank water inlet; 5-sedimentation tank cover; 6-overflow trough; 7-triangular weir; 8-overflow outlet; 9-overflow outlet pipe; 10-sedimentation tank water outlet; 11-sedimentation tank outlet pipe; 12-first right-angle elbow; 13-first solenoid valve; 14-spraying system water inlet pipe; 15-spraying head; 16-spraying system water inlet pipe; 17-spraying head; 18-sedimentation tank mud outlet; 19-sedimentation tank mud discharge pipe; 20-second right-angle elbow; 21-second solenoid valve; 22-tee joint; 23-filter plate; 24-filter plate enclosure; 25-drain pipe; 26-two-phase separator; 27-mud guard; 28-water drop board. DETAILED DESCRIPTION

[0042] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0043] refer to Figures 1 to 4 The utility model provides an automatic sprinkler irrigation device using rainwater from an overpass, comprising: a rainwater collection sedimentation tank 2 arranged on a bridge pier 1, a sprinkler system and a spray system connected to the rainwater collection sedimentation tank 2, a filter assembly arranged above the rainwater collection sedimentation tank 2, and a central controller.

[0044] The rainwater collection sedimentation tank 2 is used to collect and store rainwater and to precipitate debris such as mud in the rainwater. The rainwater collection sedimentation tank 2 is set on the pier 1 of the overpass and is much higher than the ground, so that the rainwater inside has a large gravitational potential energy. The rainwater collection sedimentation tank 2 can be set to a box shape or a cylindrical shape, and can be made of high-strength synthetic plastic or cast concrete; as an example, the rainwater collection sedimentation tank 2 is a rectangular box-shaped structure, the bottom of which is installed on a bracket, and the bracket is fixed to the pier 1 by expansion screws, and the bracket is welded by angle steel.

[0045] A sedimentation tank water inlet 4 is provided on the top of the rainwater collection sedimentation tank 2, and the sedimentation tank water inlet 4 is connected to the bridge deck rainwater discharge pipe 3 or connected to the bridge deck rainwater outlet through the bridge deck rainwater collection pipe, so as to discharge the rainwater runoff collected on the bridge deck of the overpass into the rainwater collection sedimentation tank 2. The bridge deck rainwater collection pipe is made of PVC or HDPE material, and the pipe diameter and length of the bridge deck rainwater collection pipe and the size of the rainwater collection sedimentation tank 2 are designed after being comprehensively determined according to the local rainfall intensity, bridge deck catchment area, overpass bridge deck runoff and other coefficients.

[0046] A switchable sedimentation tank cover 5 is provided on the top of the rainwater collection sedimentation tank 2. The sedimentation tank cover 5 is generally made of synthetic plastic or stainless steel and is connected to the rainwater collection sedimentation tank 2 through hinges or hinge seats. When the rainwater collection sedimentation tank 5 needs to be inspected or desilted, the sedimentation tank cover 5 can be opened and staff can enter to perform operations.

[0047] In order to prevent debris such as stones from entering the rainwater collection sedimentation tank 2, a filter assembly is provided outside the sedimentation tank water inlet 4, and 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 net or a rigid filter plate.

[0048] As an example, refer to Figures 6 to 8The filter assembly includes a filter plate 23, a filter plate enclosure 24, and a debris discharge pipe 25. The filter plate 23 is formed by welding a plurality of round steel bars in parallel, and gaps are left between adjacent round steel bars to facilitate the passage of rainwater and filter out debris. The filter plate 23 is tiltedly arranged inside the filter plate enclosure 24. When debris hits the filter plate 23, the debris slides into the inclined groove below the filter plate enclosure 24 due to the tilted arrangement of the filter plate 23. The upper part of the filter plate enclosure 24 is a detachable top plate, which is convenient for installing and replacing 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. At the same time, the filter plate 23 is located above the water inlet 4 of the sedimentation tank. The filter plate enclosure 24 can also prevent hard objects such as stones from splashing after colliding with the filter plate 23, thereby avoiding falling objects from high altitude. The bottom of the chute of the filter plate enclosure 24 is connected to the drainage pipe 25, which is located at the lower part of the filter plate enclosure 24 and is used to guide and collect the debris inside the filter plate enclosure 24; in order to facilitate the unified collection of debris, a stainless steel trash can with holes is placed under the drainage pipe 25, and the outlet end of the drainage pipe 25 is about one meter above the ground; of course, the outlet end of the drainage pipe 25 can also be blocked, and the debris is uniformly discharged when the garbage collection truck passes. By arranging a filter assembly outside the water inlet 4 of the sedimentation tank, the debris entering the rainwater collection sedimentation tank 2 can be effectively reduced, ensuring the normal use of the rainwater collection sedimentation tank 2.

[0049] Reference again Figure 4 A drop plate 28 is arranged on the inner side of the water inlet 4 of the sedimentation tank. The drop plate 28 is two long strips with opposite inclination directions and overlapping parts in the vertical direction, which are respectively connected to the vertical side walls of the rainwater collection sedimentation tank 2 and under the top cover. When the rainwater in the bridge deck rainwater discharge pipe 3 or the bridge deck rainwater collection pipe is discharged to the rainwater collection sedimentation tank 2, it must first pass through the two drop plates 28. The drop plate 28 reduces the flow rate of the water flow and changes the direction of the water flow, reduces the disturbance of the water flow to the rainwater collection sedimentation tank 2, reduces the disturbance of the rainwater in the tank, accelerates the sedimentation efficiency of the silt in the rainwater in the tank, and at the same time improves 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 provided with a sedimentation tank mud discharge port 18, and the sedimentation tank mud discharge port 18 is plugged with a second right-angle elbow 20, and the second right-angle elbow 20 is connected to the sedimentation tank mud discharge pipe 19, and the sedimentation tank mud discharge pipe 19 is provided with a second solenoid valve 21. After the rainwater in the rainwater collection sedimentation tank 2 is precipitated, the suspended matter insoluble in water such as silt is discharged from the sedimentation tank mud discharge pipe 19, and the sedimentation tank mud discharge pipe 19 is made of PVC or HDPE material, and its pipe diameter is determined according to the size of the rainwater collection sedimentation tank 2. The mud discharge time of the rainwater collection sedimentation tank 2 can be carried out simultaneously with the dredging of the municipal interception well, the municipal sewage well, and the municipal pipeline. The second solenoid valve 21 installed on the sedimentation tank mud discharge pipe 19 is opened when the mud is discharged, and the sediment at the bottom of the rainwater collection sedimentation tank 2 is sucked out through the sedimentation tank mud discharge pipe 19 by a municipal dredging vehicle. When the mud is discharged, the clarity of the water discharged from the sedimentation tank mud discharge pipe 19 shall prevail.

[0051] Preferably, a water turbidity detector is provided on the sedimentation tank discharge pipe 19, and the water turbidity detector is communicated with the central controller to detect whether the sediment deposited at the bottom of the rainwater collection sedimentation tank 2 is completely discharged. When the turbidity of the outlet water becomes low, the sludge discharge is stopped to avoid excessive loss of the collected rainwater.

[0052] The rainwater collection sedimentation tank 2 is an above-ground facility, and its sludge discharge difficulty is much less than the dredging and silt discharge difficulty of the underground municipal pipe network. A part of the rainwater with silt is precipitated on the ground, thereby reducing the amount of silt entering the municipal rainwater pipe network, thereby achieving the purpose of reducing the dredging pressure of the municipal rainwater pipe network. The sludge discharge of the rainwater collection sedimentation tank 2 is carried out simultaneously with the dredging of the municipal pipe network, and there is no need to arrange manual and mechanical treatment separately, thereby achieving the purpose of low-cost sludge discharge of the rainwater collection sedimentation tank 2.

[0053] Preferably, the bottom of the rainwater collection sedimentation tank 2 is set to be conical, and the mud and other debris in the rainwater in the tank settles under the action of gravity, and the conical structure of the tank bottom can collect the debris together, thereby accelerating the sedimentation speed of mud and sand and the mud discharge efficiency.

[0054] An overflow trough 6 is provided inside the rainwater collection sedimentation tank 2. The overflow trough 6 fits the upper pool wall of the rainwater collection sedimentation tank 2 and is designed along the pool length. The overflow trough 6 is the same length as the pool length, 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 integrated structure, made of the same material as the rainwater collection sedimentation tank 2, and its position is staggered from the position of the sedimentation tank water inlet 4 to prevent rainwater from being directly discharged from the overflow trough 6. A triangular weir 7 is provided at the overflow trough 6. The triangular weir 7 can make the overflow in the pool uniform, change the water flow direction and speed of the rainwater entering the overflow trough 7, and the triangular weir 7 can also intercept floating debris and flow into the overflow trough 6, wherein the triangular weir 7 is a plate with serrations on the top. An overflow outlet 8 penetrating the inner and outer walls is arranged on the vertical side wall of the rainwater collection sedimentation tank 2. The overflow outlet 8 is located at the end of the overflow trough 6. The overflow outlet 8 is connected to an overflow outlet pipe 9. The overflow outlet pipe 9 is connected to the rainwater outlet of the ground road. When the amount of water entering the rainwater collection sedimentation tank 2 exceeds its maximum water storage capacity, the excess rainwater passes through the overflow trough 6 and enters the municipal rainwater pipe network along the overflow outlet pipe 9, thereby discharging excess rainwater and ensuring the normal use of the rainwater collection sedimentation tank 2.

[0055] Preferably, a mud guard 27 is provided on the triangular weir 7, and the mud guard 27 can reduce the floating of sediment, reduce the amount of sediment entering the overflow outlet pipe 9, and further reduce the amount of sediment entering the municipal rainwater pipe network.

[0056] A sedimentation tank outlet 10 is provided on the lower side wall of the rainwater collection sedimentation tank 2, and the sedimentation tank outlet 10 is connected to a sedimentation tank outlet pipe 11 through a first right angle elbow 12, and the sedimentation tank outlet pipe 11 is arranged 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-fourth of the height of the tank, which can ensure that there is enough clear rainwater to use and that the mud and sand at the bottom of the tank will not enter the sedimentation tank outlet pipe 11.

[0057] In order to prevent the sprinkler system and the spraying system from being blocked by sediment, a two-phase separator 26 is provided inside the sedimentation tank outlet 10 to separate rainwater and sediment, thereby reducing the sediment content entering the sprinkler system / spraying system and ensuring the normal operation of the entire device.

[0058] The spray system and the sprinkler system are both connected to the water outlet pipe 11 of the sedimentation tank, and the spray system is located at the upper part of the sprinkler system. The water inlet pipe 14 of the spray system and the water inlet pipe 16 of the sprinkler system are both connected to the water outlet pipe 11 of the sedimentation tank through the three-way joint 22. Sprinkler heads 15 are evenly distributed on the water inlet pipe 14 of the spray system, and sprinkler heads 17 are evenly distributed on the water inlet pipe 16 of the sprinkler system. The spray heads 15 of the spray system and the sprinkler heads 17 of the sprinkler system are both arranged above the green belt. The rainwater entering the spray system / spraying system is sprayed out through the spray heads 15 / spray heads 17. Since there is a certain height difference between the spray system / spraying system and the rainwater collection sedimentation tank 2, the pressure generated can make the rainwater sprayed out from the spray heads 15 / spray heads 17 in atomized form, spraying and watering the plants in the green belt and performing dust reduction treatment on the road surface and the air. The entire sprinkler irrigation process is completed automatically without power.

[0059] A first solenoid valve 13 is provided on the water inlet pipe 14 of the sprinkler system and the water inlet pipe 16 of the spraying system. The first solenoid valve 13 is connected to the street lights around the overpass or other similar municipal wires with electric wires. The first solenoid valve 13 can automatically control the circulation of rainwater in the water inlet pipe 14 of the sprinkler system and the water inlet pipe 16 of the spraying system. 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 spraying time of the spraying system. The specific duration and interval of spraying and spraying can be designed according to local climate conditions and the size of the rainwater collection sedimentation tank 2.

[0060] refer to Figure 5 The water inlet pipe 14 of the spray system is arranged parallel to the ground. The specific height of the water inlet pipe 14 of the spray system from the ground is determined according to the specific geographical conditions under the overpass. The height cannot be too high, otherwise the water pressure of the rainwater collection sedimentation tank 2 is not enough to support the spray atomization effect. It cannot be too low, otherwise the spray atomization has a poor dust reduction effect on the road surface and the air. The water inlet pipe 14 of the spray system uses PVC or HDPE material, and its pipe diameter is adapted to the water outlet pipe 11 of the sedimentation tank. The number and length of the water inlet pipe 14 of the spray system are determined according to the green area and road width under the overpass. If the green belt and road area are large, multiple spray pipes are arranged in parallel to spray the green belt and reduce dust on the road surface and the air; if the green belt and road length are long, they can be connected to the spray system of the adjacent rainwater collection sedimentation tank 2 to form a whole to maintain the stability of the spray pipe.

[0061] Similarly, the water inlet pipe 16 of the spraying system is arranged parallel to the ground. The specific height of the water inlet pipe 16 of the spraying system from the ground is determined according to the specific geographical conditions under the overpass. The height cannot be too high, otherwise it will affect the passage of passers-by, and it cannot be too low, otherwise the spray head 17 is easily blocked by the ground mud. The diameter of the water inlet pipe 16 of the spraying system is determined according to the size of the water outlet pipe 11 of the sedimentation tank and the green area. The number and length of the water inlet pipe 14 of the spraying system are determined according to the green area under the overpass. If the green belt area is large, multiple spray pipes are arranged in parallel to spray the green belt; if the green belt is long, it can be connected to the spray system of the adjacent rainwater collection sedimentation tank 2 to form a whole. If the spray pipe is long, a ground bracket is installed to maintain the stability of the pipe.

[0062] As an example, the sedimentation tank outlet pipe 11 is connected to the spray system water inlet pipe 14 through a three-way joint 22 at two meters above the ground. The sedimentation tank outlet pipe 11 is connected to the spray system water inlet pipe 16 through another three-way joint 22 at twenty centimeters above the ground, and the other end of the three-way joint 22 in the spray system is blocked and used as a pipeline inspection port.

[0063] Preferably, an infrared level meter is provided on the inner top of the rainwater collection sedimentation tank 2, and the level meter works in conjunction with the first solenoid valve 13 and the second solenoid valve 21 respectively. The level meter 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 water volumes according to the different liquid levels in the rainwater collection sedimentation tank 2, thereby improving the utilization efficiency of rainwater in the tank. When it is necessary to drain mud from the tank, the central controller instructs the second solenoid valve 21 to open the mud discharge. At the same time, the central controller determines whether the mud and sand are completely discharged through the data of real-time dynamic detection by the water turbidity detector. When the mud and sand content in the water quality reaches the preset standard, the central controller controls the second solenoid valve 21 to close.

[0064] The central controller uses a programmable chip for functional programming, and is respectively connected to the first solenoid valve 13, the second solenoid valve 21, the water turbidity detector, and the infrared liquid level meter for communicating, and is used for receiving signals and data from the water turbidity detector and the infrared liquid level meter, and making appropriate instructions to the first solenoid valve 13 and the second solenoid valve 21 after judging according to the signals and data. The chip model used by the central controller can be selected from the STM32 series, and the transmission line of the central controller is connected to the street lights around the overpass or nearby municipal power lines.

[0065] The sprinkler irrigation device of the utility model collects rainwater runoff from the bridge deck of the flyover, and guides it into the rainwater collection sedimentation tank 2 after filtering. After the rainwater collection sedimentation tank 2 is full of rainwater, the excess rainwater enters the overflow outlet pipe 9 through the overflow trough 6 arranged at the top. The overflow outlet pipe 9 is connected to the ground rainwater outlet. The rainwater overflowing from the rainwater collection sedimentation tank 2 finally flows into the municipal rainwater pipe network. After the rainwater collected in the rainwater collection sedimentation tank 2 is initially precipitated, the upper turbid and clear rainwater flows out from the sedimentation tank outlet pipe 11. The sedimentation tank outlet pipe 11 is connected to the spray system inlet pipe 14 / spraying system inlet pipe 16 through a tee. The rainwater with a certain pressure is sprayed out from the spray head 15 and the spray head 17 in atomized form to irrigate the plants in the green belt and to reduce dust on the road surface and air. The sediment and debris precipitated at the bottom of the rainwater collection sedimentation tank 2 are regularly discharged from the sedimentation tank mud discharge pipe 19.

[0066] The above is only a preferred embodiment of the utility model, which does not represent all possible forms of the utility model, and the protection scope of the utility model is not limited to such special statements and embodiments. According to the technical inspirations disclosed by the utility model, various other modifications and improvements that do not deviate from the essence of the utility model are made, and these modifications and improvements are still within the protection scope of the utility model.

Claims

1. An automatic sprinkler irrigation device using rainwater from an overpass, characterized in that: include: A central controller, a rainwater collection sedimentation tank (2) arranged on the bridge pier (1), a sprinkler system and a spraying system connected to the rainwater collection sedimentation tank (2); A sedimentation tank water inlet (4) is provided at the upper portion of the rainwater collection sedimentation tank (2), and the sedimentation tank water inlet (4) is connected to the bridge deck rainwater discharge pipe (3); a sedimentation tank water outlet (10) is provided on the lower side wall of the rainwater collection sedimentation tank (2), and the sedimentation tank water outlet (10) is connected to the sedimentation tank water outlet pipe (11) through a first right-angle elbow (12), and the sedimentation tank water outlet pipe (11) is arranged along the vertical direction of the bridge pier (1), and a two-phase separator (26) is arranged on the inner side of the sedimentation tank water outlet (10); the bottom of the rainwater collection sedimentation tank (2) is arranged to be conical; The spray system and the sprinkler system are both connected to the water outlet pipe (11) of the sedimentation tank, and the spray system is located at the upper part of the sprinkler system, and the spray head (15) of the spray system and the sprinkler head (17) of the sprinkler system are both arranged above the green belt; A filter assembly is arranged outside the water inlet (4) of the sedimentation tank, and the filter assembly is connected to the bridge deck rainwater discharge pipe (3).

2. The automatic sprinkler irrigation device using rainwater from an overpass according to claim 1 is characterized in that: The filter assembly comprises a filter plate (23), a filter plate enclosure (24) and a debris discharge pipe (25); the filter plate (23) is arranged obliquely inside the filter plate enclosure (24) and is located above the water inlet (4) of the sedimentation tank; the debris discharge pipe (25) is connected to the inside of the filter plate enclosure (24) and is located at the bottom of the filter plate enclosure (24).

3. The automatic sprinkler irrigation device using rainwater from an overpass according to claim 1 is characterized in that: An overflow trough (6) is provided inside the rainwater collection sedimentation tank (2); an overflow outlet (8) penetrating 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 a side away from the sedimentation tank water inlet (4); and a fender (27) is also provided on the triangular weir (7).

4. The automatic sprinkler irrigation device using rainwater from an overpass according to claim 3 is characterized in that: The overflow water outlet (8) is connected to an overflow water outlet pipe (9), and the overflow water outlet pipe (9) is connected to a ground road rainwater outlet.

5. The automatic sprinkler irrigation device using rainwater from an overpass according to claim 1 is characterized in that: A sedimentation tank mud discharge port (18) is provided at the bottom of the rainwater collection sedimentation tank (2); the sedimentation tank mud discharge port (18) is connected to a sedimentation tank mud discharge pipe (19) via a second right-angle elbow (20); a second electromagnetic valve (21) and a water turbidity detector are provided on the sedimentation tank mud discharge pipe (19); the second electromagnetic valve (21) and the water turbidity detector are respectively connected to the central controller for communication.

6. The automatic sprinkler irrigation device using rainwater from an overpass according to claim 1 is characterized in that: The spray head (15) is connected to a water inlet pipe (14) of a spray system, and the spray head (17) is connected to a water inlet pipe (16) of a spray system. A first solenoid valve (13) is provided on both the water inlet pipe (14) of the spray system and the water inlet pipe (16) of the spray system, and the first solenoid valve (13) is communicatively connected to the central controller.

7. The automatic sprinkler irrigation device using rainwater from an overpass according to claim 6 is characterized in that: The water inlet pipe (14) of the spraying system and the water inlet pipe (16) of the sprinkler system are both connected to the water outlet pipe (11) of the sedimentation tank via a three-way joint (22).

8. The automatic sprinkler irrigation device using rainwater from an overpass according to claim 1 is characterized in that: The rainwater collection sedimentation tank (2) is provided with an infrared liquid level meter, and the infrared liquid level meter is communicatively connected with the central controller.

9. The automatic sprinkler irrigation device using rainwater from an overpass according to any one of claims 1 to 8, characterized in that: A drop plate (28) is provided inside the water inlet (4) of the sedimentation tank.

10. The automatic sprinkler irrigation device using rainwater from an overpass according to claim 9, characterized in that: A closable sedimentation tank cover plate (5) is provided on the top of the rainwater collection sedimentation tank (2).

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