A rainwater collection system based on municipal works

Abstract

The application discloses a rainwater collecting system based on municipal engineering and relates to the technical field of rainwater collecting, which comprises a shell, the shell is in a cylindrical structure, a floating ball area and a flow abandoning area are formed in the shell from top to bottom, and through the cooperation of a flow abandoning assembly, a front-end protection assembly, a rear-end treatment assembly and a control assembly, the control assembly is activated before small floating balls block the flow abandoning port, the front-end protection assembly is driven by the control assembly to filter rainwater for a short time before the small floating balls and the flow abandoning port are closed, the probability that particulate impurities are stuck in the small floating balls and the flow abandoning port is reduced, if the front-end protection assembly fails, the control assembly will automatically start the rear-end treatment assembly in a cycle until there is no interference of sundries between the small floating balls and the flow abandoning port, and the problem that in the traditional device, the flow abandoning port can be in a draining state all the time, leading to the fact that the recoverable rainwater in the middle and late stages continuously flows out from the flow abandoning port and affecting the rainwater recovery efficiency is solved.

Description

Technical Field

[0001] This invention relates to the field of rainwater harvesting technology, specifically a rainwater harvesting system based on municipal engineering. Background Technology

[0002] The process of a municipal engineering rainwater harvesting system is a complete closed loop from rainwater generation to final utilization or safe discharge. The core objectives are efficient collection, scientific treatment, rational storage, and resource utilization, while alleviating urban flooding pressure. The entire process can be divided into five core stages: collection, pretreatment, storage, advanced treatment, and utilization. Each stage is interconnected, and the combination of hardware facilities and technical design enables full-process control of rainwater.

[0003] The pretreatment process involves three steps: First, large solid impurities (such as twigs, gravel, fallen leaves, plastic bag fragments, and road mud clumps) are filtered through a coarse screen to prevent them from affecting the subsequent rainwater diversion device. Second, initial rainwater diversion is carried out. In the early stages of rainfall, rainwater washes over roofs, roads, green belts, and other areas, carrying a large amount of pollutants such as oil, dust, pesticide residues, heavy metals (such as lead and zinc from tire wear), and household waste debris. The water quality is extremely poor, and if it enters the system directly, it will cause subsequent equipment blockage, soaring purification costs, and even prevent the water from meeting reuse standards. Finally, small and medium-sized particulate impurities (such as fine sand, silt, and tiny debris) are finely filtered through a fine screen.

[0004] Initial stormwater diversion systems are generally classified into four types: mechanical gravity diversion systems, siphon diversion systems, electric (intelligent) diversion systems, and infiltration diversion systems. Mechanical gravity diversion systems are the most widely used type in municipal engineering due to their low cost and high reliability; they mainly include float-type and flap-type diversion systems.

[0005] The working principle of the float-type diversion device is as follows (which can be combined with the attached...). Figure 3(For clarification): In the initial stage of rainfall, the rainwater flow is small, and the inflow is less than the drainage capacity of the diversion outlet. At this time, the small float sinks to the bottom under gravity, and the diversion outlet is open, allowing rainwater to be discharged directly from it. After the initial rainfall, the inflow gradually increases. When the inflow exceeds the drainage capacity of the diversion outlet, the water level in the float area of ​​the device rises, causing the large float to rise. The large float then moves the small float upwards, blocking the diversion outlet. At this point, the rainwater can enter the subsequent intermediate screening stage from the recovery port. The working principle of the above-mentioned float-type diversion device can also be understood by referring to the patent document with publication number CN106703305A. However, when the small float moves upwards and blocks the diversion outlet, if debris (small particles not screened out by the coarse screen) gets stuck between the small float and the diversion outlet at the moment the small float blocks the outlet, the diversion outlet will always be in a leaking state. This will cause the rainwater that can be recovered in the middle and later stages to continuously flow out of the diversion outlet, affecting the efficiency of rainwater recovery. To address this, a rainwater harvesting system based on municipal engineering was proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a rainwater harvesting system based on municipal engineering to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a rainwater harvesting system based on municipal engineering, characterized in that it comprises:

[0008] The outer shell has a float area and a diversion area inside it from top to bottom. The float area and the diversion area are separated by a partition, and a diversion port is provided in the middle of the partition.

[0009] The float-type diversion assembly, located in the axial region of the outer shell, controls the opening and closing of the diversion port by the buoyancy of rainwater;

[0010] The front-end protection component, located at the upper end of the partition, is used to filter rainwater for a short period of time before the float and the diversion port close. It includes an installation plate, which is fixedly installed at the upper end of the partition. An installation groove is provided at the upper end of the installation plate. Two filter frames are provided inside the installation groove. A first waterproof electric telescopic rod is provided on the side of the two filter frames that are far apart from each other.

[0011] The back-end processing component is located at the upper opening of the float area and is used to remove impurities between the small float and the discharge port when the front-end protection component fails. It includes a crossbeam, the two ends of which are fixedly connected to the upper sides of the outer shell. A second waterproof electric telescopic rod is fixedly installed on one side of the upper end of the crossbeam, and a push plate is fixedly connected to the telescopic end of the second waterproof electric telescopic rod.

[0012] The control component, located at the bottom center of the housing, is used to control the opening and closing time of the front-end protection component and the back-end processing component. It includes a cylindrical housing and a sealing column. The sealing column is fixedly connected to the bottom center of the small float. The cylindrical housing is fixedly connected to the bottom center of the housing. A first rain sensor and a second rain sensor are respectively provided on both sides of the side wall of the cylindrical housing.

[0013] As a further preferred embodiment of this technical solution, the outer shell is a cylindrical structure, the side wall of the partition is fixedly connected to the inner wall of the outer shell, the diversion port is used to connect the float area and the diversion area, the bottom center of the outer shell is provided with an outlet in communication with the diversion area, the side wall of the outer shell is provided with an inlet and a recovery port in communication with the float area, the inlet and recovery port are symmetrically distributed on both sides of the float area, the diameter of the inlet is larger than the diameter of the diversion port, the bottom of the side wall of the outer shell is also provided with a drain port in communication with the diversion area, the upper end of the outer shell is provided with an inspection port in communication with the float area, the upper end of the inspection port is provided with a protective cover, the bottom of the protective cover is fixedly connected with a connecting plate, the connecting plate is a ring structure, the outer diameter of the connecting plate is equal to the inner diameter of the inspection port, and the outer wall of the connecting plate is threadedly engaged with the inner wall of the inspection port.

[0014] As a further preferred embodiment of this technical solution, the float diversion assembly includes a small float and a large float, which are located in the diversion zone and the float zone, respectively. The small float and the large float are fixedly connected by a connecting rod that passes through the diversion port. The upper outer wall of the small float is adapted to the inner wall of the diversion port. A guide rod is fixedly connected to the upper end of the large float. The centerlines of the connecting rod and the guide rod both pass through the center of the small float and the large float. A guide member is provided at the upper end of the guide rod. The guide member is used to restrict the movement of the small float and the large float in the vertical direction. The guide member is a cylinder and is located in the middle of the crossbeam and passes through the crossbeam. The outer wall of the guide member is welded and fixed to the crossbeam. The upper and lower ends of the guide member extend to the upper and lower sides of the crossbeam, respectively. A guide groove is provided at the axis of the guide member, and the guide groove slides and engages with the guide rod.

[0015] As a further preferred embodiment of this technical solution, the front-end protection component also includes a sealing plate, which is compatible with the mounting groove. The sealing plate can be fixed inside the mounting groove with screws. A mating groove is formed in the middle of the sealing plate, and a central through groove is formed in the middle of the mounting plate. Two filter frames are symmetrically distributed on both sides of the central through groove. The length and width of the mating groove are equal to the length and width of the central through groove. The minimum side length of the central through groove is greater than the diameter of the discharge port. Sliding grooves are formed on both sides of the upper end of the mounting groove. The sliding grooves slide and fit with the filter frames. The sliding grooves are used to accommodate the filter frames. The two sliding grooves are connected... The two ends of the mounting groove are connected to the central through groove. The upper end of the mounting groove is provided with a fixing groove at the two ends of the sliding groove that are far apart from each other. The fixing groove is used to accommodate the first waterproof electric telescopic rod. The housing of the first waterproof electric telescopic rod is fixed in the fixing groove by screws. The mounting groove has two connecting holes. The connecting holes are used to connect the fixing groove and the sliding groove. The connecting holes are also used to accommodate the telescopic part of the first waterproof electric telescopic rod. The telescopic end of the first waterproof electric telescopic rod is fixedly connected to the side wall of the filter frame. The bottom structure of the sealing plate is the same as the upper structure of the mounting groove.

[0016] As a further preferred embodiment of this technical solution, the filter frame is provided with a filter screen mounting hole, the filter screen mounting hole is a semi-circular structure, the filter screen body is fixedly installed on the inner wall of the filter screen mounting hole, and the two filter frames are respectively provided with semi-circular holes at their close ends, the diameter of the semi-circular holes being larger than the outer diameter of the connecting rod.

[0017] As a further preferred embodiment of this technical solution, the telescopic end of the second waterproof electric telescopic rod slides through the crossbeam and extends to the bottom of the crossbeam. The bottom of the push plate is adapted to the upper outer wall of the large float. A central hole is provided at the center of the push plate. The axis of the central hole is the same as the axis of the outer shell. The diameter of the central hole is larger than the outer diameter of the guide.

[0018] As a further preferred embodiment of this technical solution, the control component further includes a fixing plate and threaded sleeves. The fixing plate is an annular plate located at the upper edge of the cylindrical shell and integrally formed with the cylindrical shell. The fixing plate can be fixed to the bottom of the shell with screws. There are two threaded sleeves, which are symmetrically distributed on both sides of the outer wall of the cylindrical shell. The interior of the threaded sleeve is in communication with the interior of the cylindrical shell. The outer walls of the first and second rain sensors are both provided with external threads that mate with the inner threads of the threaded sleeves. The first rain sensor is connected to the two first waterproof electric telescopic rods via a PLC control system, and the second rain sensor is connected to the second waterproof electric telescopic rod via a PLC control system.

[0019] As a further preferred embodiment of this technical solution, a first sealing groove is provided at the bottom of the outer ring of the water outlet. The first sealing groove has an annular structure and its axis coincides with the axis of the water outlet. A second sealing groove is provided on the upper surface of the fixing plate. The structure and size of the second sealing groove are the same as those of the first sealing groove, and its axis coincides with the axis of the water outlet.

[0020] As a further preferred embodiment of this technical solution, the sealing column slides and fits with the water outlet, the distance between the small float and the overflow outlet is greater than the length of the sealing column, a circular hole is provided inside the cylindrical shell, the upper end of the circular hole is open and aligned with the water outlet, the diameter of the cylindrical hole is equal to the diameter of the water outlet, and a discharge port is provided at the bottom of the cylindrical shell, the diameter of the discharge port is greater than 50mm.

[0021] As a further preferred embodiment of this technical solution, a guide plate is fixedly installed at the bottom of the partition. The guide plate has a funnel-shaped structure, which can ensure that the rainwater flowing out of the diversion port flows down towards the center of the diversion area, so that the rainwater can enter the interior of the cylindrical shell more quickly. The axis of the guide plate coincides with the axis of the outer shell, and the diameter of the opening at the bottom of the guide plate is larger than the diameter of the small float.

[0022] This invention provides a rainwater harvesting system based on municipal engineering, which has the following beneficial effects:

[0023] In this invention, through the coordinated operation of the diversion component, the front-end protection component, the back-end processing component, and the control component, the seal on the cylindrical shell is released just before the small float blocks the diversion port, allowing rainwater to enter the cylindrical shell normally and activating the control component. The control component drives the front-end protection component to filter the rainwater for a short period before the small float closes with the diversion port, reducing the probability of particulate impurities getting stuck on the small float and the diversion port. If the front-end protection component fails, the control component will automatically cycle and start the back-end processing component until there is no debris interference between the small float and the diversion port. This solves the problem in traditional devices where the diversion port may always be in a leaking state, causing recyclable rainwater to continuously flow out of the diversion port in the middle and later stages, affecting the rainwater recovery efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the external structure of the main body of a rainwater harvesting system based on municipal engineering according to the present invention;

[0025] Figure 2 This is a schematic diagram of the outer shell of a rainwater harvesting system based on municipal engineering according to the present invention;

[0026] Figure 3 This is a schematic diagram of the internal structure of a rainwater harvesting system based on municipal engineering according to the present invention.

[0027] Figure 4 This is a schematic diagram of the outer shell structure of a rainwater harvesting system based on municipal engineering according to the present invention.

[0028] Figure 5 This is a schematic diagram of the internal structure of the main body of a rainwater harvesting system based on municipal engineering according to the present invention;

[0029] Figure 6 This is a schematic diagram of the front-end protection component in a rainwater harvesting system based on municipal engineering according to the present invention.

[0030] Figure 7 This is a schematic diagram of the bottom of a sealing plate in a rainwater harvesting system based on municipal engineering according to the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of a screen frame in a rainwater harvesting system based on municipal engineering according to the present invention;

[0032] Figure 9 This is a schematic diagram of the back-end processing component in a rainwater harvesting system based on municipal engineering according to the present invention.

[0033] Figure 10 This is a schematic diagram of the structure of a control component in a rainwater harvesting system based on municipal engineering according to the present invention;

[0034] Figure 11 This is a schematic diagram of the structure of a protective cover in a rainwater harvesting system based on municipal engineering according to the present invention;

[0035] In the diagram: 100, outer casing; 101, inspection port; 102, water inlet; 103, recovery port; 104, drain port; 105, float area; 106, diversion area; 107, partition; 108, diversion port; 109, water outlet; 110, first sealing groove; 111, guide plate; 200, protective cover; 201, connecting plate; 300, float diversion assembly; 301, small float; 302, connecting rod; 303, large float; 304, guide rod; 400, guide component; 500, front-end protection assembly; 501, mounting plate; 502, mounting groove; 503, central through groove; 504, sliding groove; 50 5. Fixing groove; 506. Connecting hole; 507. Filter frame; 508. First waterproof electric telescopic rod; 509. Sealing plate; 510. Connecting groove; 511. Filter screen mounting hole; 512. Filter screen body; 513. Semi-circular hole; 600. Rear end processing component; 601. Second waterproof electric telescopic rod; 602. Crossbeam; 603. Push plate; 604. Center hole; 700. Control component; 701. Cylindrical housing; 702. Fixing plate; 703. Second sealing groove; 704. Discharge port; 705. Threaded sleeve; 706. Sealing column; 707. First rain sensor; 708. Second rain sensor. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0037] To resolve the congestion at a specific time, the discharge outlet 108 is always in a discharge state, such as... Figures 1 to 11As shown, the present invention provides a technical solution: a rainwater harvesting system based on municipal engineering, including a shell 100, which is fixed to an underground well chamber by a fixing frame and screws. The shell 100 has a cylindrical structure. Inside the shell 100, from top to bottom, there are a float area 105 and a diversion area 106. The float area 105 and the diversion area 106 are separated by a partition 107. The side wall of the partition 107 is fixedly connected to the inner wall of the shell 100. A diversion port 108 is provided in the middle of the partition 107, which connects the float area 105 and the diversion area 106. The upper end of the shell 100 is provided with a maintenance port 101 communicating with the float area 105, facilitating maintenance and upkeep of the internal components. The side wall of the shell 100 is provided with a connection to the float area 105. 5. The inlet 102 and the recovery outlet 103 are in a connected state. The inlet 102 is connected to the front coarse screening system and receives rainwater collected in the rainwater collection stage. The recovery outlet 103 is connected to the rear intermediate screening system and transmits the rainwater to the storage, deep treatment and utilization stages. The inlet 102 and the recovery outlet 103 are symmetrically distributed on both sides of the float area 105. The aperture of the inlet 102 is larger than the aperture of the diversion outlet 108. The bottom of the side wall of the outer shell 100 is also provided with a drain outlet 104 that is in a connected state with the diversion area 106. The drain outlet 104 is connected to the municipal rainwater pipe network and eventually flows into the natural water body. The bottom center of the outer shell 100 is provided with an outlet 109 that is in a connected state with the diversion area 106. The outlet 109 is used to connect to the subsequent control component 700.

[0038] The working principle of the float diversion assembly 300 is referenced. Figure 3Located in the axial region of the outer shell 100, the opening and closing of the diversion outlet 108 is controlled by the buoyancy of rainwater. It includes a small buoy 301 and a large buoy 303, located in the diversion area 106 and buoy area 105 respectively. The small buoy 301 and large buoy 303 are fixedly connected by a connecting rod 302, which passes through the diversion outlet 108. The upper outer wall of the small buoy 301 is adapted to the inner wall of the diversion outlet 108, and a guide is fixedly connected to the upper end of the large buoy 303. The axis of rod 304, connecting rod 302, and guide rod 304 all pass through the center of small float 301 and large float 303. A guide member 400 is provided at the upper end of guide rod 304. The guide member 400 is used to restrict the vertical movement of small float 301 and large float 303. The guide member 400 is a cylinder, located in the middle of crossbeam 602 and passing through crossbeam 602. The outer wall of guide member 400 is welded and fixed to crossbeam 602. The upper and lower ends of guide member 400 extend to crossbeam 602 respectively. On the upper and lower sides of 2, guide grooves are provided at the axis of the guide member 400. The guide grooves slide and engage with the guide rod 304. Through the sliding engagement of the guide grooves and the guide rod 304, the small float 301 and the large float 303 can be restricted to move only in the vertical direction. At the beginning of the rain, the amount of rainwater is small, and all the rainwater entering the float area 105 from the inlet 102 can flow out through the diversion outlet 108. At this time, the water level in the float area 105 will not rise, and the rainwater will not flow to the recovery outlet 103. As the rain continues to fall, the rainwater... After the initial stage, the amount of rainwater increases, and not all the rainwater entering the float zone 105 can flow out of the diversion outlet 108. At this time, the water level in the float zone 105 will gradually rise. The rise in water level will drive the large float 303 to move upward. Under the action of the connecting rod 302, the small float 301 will move upward synchronously until the small float 301 is embedded in the diversion outlet 108 and blocks the diversion outlet 108. After that, the rainwater will enter the subsequent intermediate screening stage and the subsequent storage, deep treatment and utilization stages through the recovery outlet 103.

[0039] In the optimized scheme, the front-end protection component 500 is located at the upper end of the partition 107 and is used to filter rainwater for a short period of time before the small float 301 closes with the diversion port 108 (the length of this time depends on the amount of rainfall; the greater the rainfall, the shorter the time, and vice versa). It includes a mounting plate 501, which is fixedly installed at the upper end of the partition 107. A central through groove 503 is provided in the middle of the mounting plate 501. The minimum side length of the central through groove 503 is greater than the aperture of the diversion port 108. An installation groove 502 is provided at the upper end of the mounting plate 501. Two filter frames 507 are provided inside the installation groove 502. The two filter frames 507 are symmetrically distributed on both sides of the central through groove 503. A first waterproof electric telescopic rod 508 is provided on the side of the two filter frames 507 that is far away from each other. The telescopic end of the first waterproof electric telescopic rod 508 is fixedly connected to the side wall of the filter frame 507.

[0040] In the optimized solution, the back-end processing component 600 is located at the upper opening of the float area 105. It is used to remove impurities between the small float 301 and the discharge port 108 when the front-end protection component 500 fails. It includes a crossbeam 602, with both ends fixedly connected to the upper sides of the outer casing 100. A second waterproof electric telescopic rod 601 is fixedly installed on one side of the upper end of the crossbeam 602, and the telescopic end of the second waterproof electric telescopic rod 601 slides through the crossbeam 602. Furthermore, extending to the bottom of the crossbeam 602, the telescopic end of the second waterproof electric telescopic rod 601 is fixedly connected to a push plate 603. The bottom of the push plate 603 is adapted to the upper outer wall of the large float 303. A central hole 604 is provided at the center of the push plate 603. The axis of the central hole 604 is the same as the axis of the outer shell 100. The diameter of the central hole 604 is larger than the outer diameter of the guide 400, which can prevent the push plate 603 from interfering with the guide 400 when it moves up and down.

[0041] In the optimized scheme, the control component 700 is located at the bottom center of the housing 100 and is used to control the opening and closing times of the front-end protection component 500 and the back-end processing component 600. It includes a cylindrical housing 701 and a sealing column 706. The sealing column 706 is fixedly connected to the bottom center of the small float 301 and slides into contact with the outlet 109. The distance between the small float 301 and the diversion port 108 is greater than the length of the sealing column 706. The cylindrical housing 701 is fixedly connected to the bottom center of the housing 100. A circular hole is provided inside the cylindrical housing 701, with its upper end open and aligned with the outlet 109. The diameter of the circular hole is equal to the diameter of the outlet 109. A drain is provided at the bottom of the cylindrical housing 701. The outlet 704 has an aperture greater than 50mm. Before the wastewater is treated, it will pass through a coarse screen to filter out large solid impurities (such as small branches, gravel, fallen leaves, plastic bag fragments, road mud and sand clumps, etc.). The maximum aperture of the coarse screen usually does not exceed 50mm. Setting the aperture of the outlet 704 to be greater than 50mm can basically prevent the outlet 704 from being blocked by debris. The cylindrical housing 701 has a first rainwater sensor 707 and a second rainwater sensor 708 on its two sides. The first rainwater sensor 707 is connected to two first waterproof electric telescopic rods 508 through a PLC control system. The second rainwater sensor 708 is connected to the second waterproof electric telescopic rod 601 through a PLC control system.

[0042] The control logic between the first rain sensor 707, the PLC control system, and the first waterproof electric telescopic rod 508 is as follows: When the first rain sensor 707 detects rain, it transmits a signal to the PLC control system, which then controls the two first waterproof electric telescopic rods 508 to extend a certain length. When the first rain sensor 707 does not detect rain, it transmits a signal to the PLC control system again to control the two first waterproof electric telescopic rods 508 to retract.

[0043] The control logic between the second rain sensor 708, the PLC control system, and the second waterproof electric telescopic pole 601 is as follows: When the second rain sensor 708 detects rain, it transmits a signal to the PLC control system. The PLC control system will control the second waterproof electric telescopic pole 601 to automatically extend and retract once every 5-10 minutes, and then extend and retract once every 5-10 minutes thereafter. When the second rain sensor 708 does not detect rain, it will transmit a signal to the PLC control system again to control the second waterproof electric telescopic pole 601 to return to the retracted state.

[0044] To prevent the structure from malfunctioning due to damage to the first rain sensor 707 or the second rain sensor 708, backup sensors can be installed on the first rain sensor 707 and the second rain sensor 708. The backup sensor is a sensor used in conjunction with the main sensor. Its function is to replace the main sensor in a timely manner when the main sensor fails or malfunctions, so as to ensure the normal operation of the system and the continuity and reliability of the data.

[0045] The working principle is explained based on the PLC control logic described above. Before rain, the small float 301 is at the bottom, and the sealing column 706 at the bottom of the small float 301 slides into the circular hole inside the cylindrical shell 701. After the initial stage of rain, the small float 301 and the large float 303 rise with the water level. The small float 301 will drive the sealing column 706 to move upward. Since the distance between the small float 301 and the diversion port 108 is greater than the length of the sealing column 706, the sealing column 706 can detach from the cylindrical shell 701 and the outlet 109 before the small float 301 blocks the diversion port 108. After the sealing column 706 detaches from the outlet 109, some of the rainwater flowing from the diversion port 108 to the diversion area 106 will flow into the cylindrical shell 701 and out of the discharge port 709. 4. After the first rainwater sensor 707 and the second rainwater sensor 708 inside the cylindrical housing 701 come into contact with rainwater, they transmit signals to the PLC control system. At this time, the PLC control system will control the two first waterproof electric telescopic rods 508 to extend a certain length (the second waterproof electric telescopic rod 601 will not be triggered until 5-10 minutes later, and will not move at this time), causing the two filter frames 507 to close. The filter frames 507 will detach from the slide groove 504 and enter the area of ​​the central through groove 503 to filter the rainwater, reducing impurities in the rainwater when the small float 301 and the diversion port 108 are about to close, thereby reducing the probability of particulate impurities getting stuck in the small float 301 and the diversion port 108. As the small float 301 and the diversion port 108 close, the following two situations will occur:

[0046] In the first scenario, if the small float 301 and the diversion port 108 are not blocked by impurities, the small float 301 will normally seal the diversion port 108, and no rainwater will enter the diversion area 106. The first rainwater sensor 707 and the second rainwater sensor 708 will no longer be in contact with rainwater and will transmit a signal to the PLC control system, causing both the first waterproof electric telescopic rod 508 and the second waterproof electric telescopic rod 601 to return to the retracted state. (Since the second waterproof electric telescopic rod 601 needs 5-10 minutes to be triggered after the second rainwater sensor 708 comes into contact with rainwater, and the time taken from the second rainwater sensor 708 coming into contact with rainwater to the closure of the small float 301 and the diversion port 108 usually does not exceed the trigger time, the second waterproof electric telescopic rod 601 will not move at all in this case.)

[0047] In the second scenario, the space between the small float 301 and the diversion port 108 is still blocked by impurities smaller than the filter holes of the filter frame 507. In this case, the small float 301 still cannot properly seal the diversion port 108, and rainwater will still enter the diversion area 106. The first rainwater sensor 707 and the second rainwater sensor 708 will still come into contact with rainwater. In this situation, after waiting for a few minutes, the PLC control system will control the second waterproof electric telescopic rod 601 to extend or retract once. Over time, the push plate 603 will move downward, which will press down the large float 303, thereby causing the small float 301 to move downward, making the gap between the small float 301 and the diversion port 108 larger. This allows the impurities stuck between the small float 301 and the diversion port 108 to fall off naturally under the action of water flow. After the second waterproof electric telescopic rod 601 retracts, under the action of buoyancy, the large float 303 will move upward again, causing the small float 301 to move upward and block the diversion port 108.

[0048] After the second scenario, if the small float 301 and the diversion port 108 are still blocked by debris, the PLC control system will control the second waterproof electric telescopic rod 601 to automatically extend and retract every 5-10 minutes, and the above second scenario will continue to cycle (this will not happen under normal circumstances; this application is a protection based on possible situations) until the small float 301 normally blocks the diversion port 108. When the small float 301 normally blocks the diversion port 108, the above first scenario will occur, causing the front-end protection component 500, the back-end processing component 600, and the control component 700 to enter standby mode.

[0049] After the rain stops, the water level in buoy area 105 drops, and small buoy 301 sinks to the bottom under gravity, waiting to work during the next rainfall.

[0050] It is important to note that the sealing requirements between the sealing post 706 and the cylindrical housing 701 are not high. This is because even if water seeps into the interior of the cylindrical housing 701 through the gap between the sealing post 706 and the cylindrical housing 701, the amount of water is very small and will not trigger the rain sensor. For example, in a resistive rain sensor, water acts as a conductor, creating a current path between the wires. The more water there is, the lower the resistance and the stronger the conduction. The sensor will only be triggered when the resistance changes to a certain level and exceeds a set threshold. However, the seeping water is usually a very small amount and will not trigger the resistive rain sensor. Therefore, based on this, when designing the sealing post 706 and the cylindrical housing 701, the sliding performance between them can be improved by sacrificing the sealing performance, ensuring that the sealing post 706 can be inserted into or withdrawn from the interior of the cylindrical housing 701 only under the action of gravity or buoyancy.

[0051] Regarding the question of why filter frame 507 is not permanently installed, the purpose of the diversion device is to discharge rainwater containing a large amount of impurities in the early stage, thereby reducing the burden on the filtration and purification equipment and the maintenance of the filtration and purification equipment. Its purpose is to avoid overly fine filtration of the initial rainwater. If filter frame 507 is installed for a long time, it would conflict with the purpose of the diversion device. However, the structural design of this application ensures that filter frame 507 only filters rainwater when the small float 301 is about to block the diversion port 108, and does not filter the rainwater diverted in the early stage (when the rainwater is diverted in the early stage, filter frame 507 is stored in the slide 504). Therefore, it does not conflict with the purpose of diversion. Although filter frame 507 still needs to be cleaned regularly, the difficulty and frequency of cleaning are greatly reduced, which is within the normal maintenance and cleaning range of the equipment.

[0052] The front-end protection component 500 also includes a sealing plate 509, which is compatible with the mounting groove 502. The sealing plate 509 can be fixed inside the mounting groove 502 by screws. A mating groove 510 is provided in the middle of the sealing plate 509. The length and width of the mating groove 510 are equal to the length and width of the central through groove 503. Sliding grooves 504 are provided on both sides of the upper end of the mounting groove 502. The sliding grooves 504 slide and fit with the filter frame 507. The sliding grooves 504 are used to accommodate the filter frame 507. The ends of the two sliding grooves 504 that are close to each other are in communication with the central through groove 503. The upper end of the mounting groove 502 is located at the two sliding grooves. At the ends of 504 that are far apart from each other, there are fixing grooves 505. The fixing grooves 505 are used to accommodate the first waterproof electric telescopic rod 508. The housing of the first waterproof electric telescopic rod 508 is fixed in the fixing grooves 505 by screws. There are two connecting holes 506 on the mounting groove 502. The connecting holes 506 are used to connect the fixing groove 505 and the sliding groove 504. The connecting holes 506 are also used to accommodate the telescopic part of the first waterproof electric telescopic rod 508. The bottom structure of the sealing plate 509 is the same as the upper structure of the mounting groove 502. When the two are closed, they can protect the filter frame 507 and the first waterproof electric telescopic rod 508.

[0053] refer to Figure 6 and Figure 8 The filter frame 507 has a filter screen mounting hole 511, which is a semi-circular structure. The filter screen body 512 is fixedly installed on the inner wall of the filter screen mounting hole 511. The two filter frames 507 have semi-circular holes 513 at their close ends. The diameter of the semi-circular holes 513 is larger than the outer diameter of the connecting rod 302. When the two semi-circular holes 513 are closed, they will form a circular hole. This circular hole can be used to accommodate the connecting rod 302 between the large float 303 and the small float 301, so as to avoid interference between the filter frame 507 and the connecting rod 302.

[0054] refer to Figure 10The control assembly 700 also includes a fixing plate 702 and a threaded sleeve 705. The fixing plate 702 is an annular plate, located at the upper edge of the cylindrical housing 701 and integrally formed with the cylindrical housing 701. The fixing plate 702 can be fixed to the bottom of the outer shell 100 by screws. There are two threaded sleeves 705, which are symmetrically distributed on both sides of the outer wall of the cylindrical housing 701. The interior of the threaded sleeves 705 is in communication with the interior of the cylindrical housing 701. The outer walls of the housings of the first rain sensor 707 and the second rain sensor 708 are provided with external threads that engage with the inner threads of the threaded sleeves 705. The first rain sensor 707 and the second rain sensor 708 can be inserted into the two threaded sleeves 705 by threaded engagement, so that the probes of the first rain sensor 707 and the second rain sensor 708 extend into the interior of the cylindrical housing 701.

[0055] refer to Figure 4 and Figure 10 The bottom of the outer casing 100 is provided with a first sealing groove 110 on the outer ring of the outlet 109. The first sealing groove 110 is an annular structure and its axis coincides with the axis of the outlet 109. The upper surface of the fixing plate 702 is provided with a second sealing groove 703. The structure and size of the second sealing groove 703 are the same as those of the first sealing groove 110. The axis of the second sealing groove 703 coincides with the axis of the outlet 109. When installing the cylindrical casing 701, the sealing ring is placed in the first sealing groove 110 and the second sealing groove 703 to improve the sealing between the fixing plate 702 and the outer casing 100 and prevent rainwater from seeping out from the gap between the fixing plate 702 and the outer casing 100.

[0056] refer to Figure 11 A protective cover 200 is provided at the upper end of the inspection port 101. A connecting plate 201 is fixedly connected to the bottom of the protective cover 200. The connecting plate 201 has a ring structure. The outer diameter of the connecting plate 201 is equal to the inner diameter of the inspection port 101. The outer wall of the connecting plate 201 is threadedly engaged with the inner wall of the inspection port 101. Through the threaded engagement between the outer wall of the connecting plate 201 and the inner wall of the inspection port 101, the protective cover 200 can be rotatably installed at the upper end of the inspection port 101 to prevent external dust or debris from entering the device through the inspection port 101.

[0057] refer to Figure 4 A guide plate 111 is fixedly installed at the bottom of the partition 107. The guide plate 111 has a funnel-shaped structure, which can ensure that the rainwater flowing out of the diversion port 108 flows down to the center of the diversion area 106, so that the rainwater can enter the interior of the cylindrical shell 701 more quickly. The axis of the guide plate 111 coincides with the axis of the shell 100. The diameter of the opening at the bottom of the guide plate 111 is larger than the diameter of the small float 301, which can ensure that the small float 301 will not interfere with the guide plate 111 when it moves up and down.

[0058] The overall process of rainwater collection in this invention is as follows: the device is fixed in the underground well chamber by a fixing frame and screws. The inlet 102 is connected to the front coarse screening system and receives the rainwater collected in the rainwater collection stage. The device can discard the initial rainwater and guide the middle and later rainwater to the recovery port 103. The recovery port 103 is connected to the rear intermediate screening system and transmits the rainwater to the storage, deep treatment and utilization stages.

[0059] The wiring diagrams of the first waterproof electric telescopic pole 508, the second waterproof electric telescopic pole 601, the first rainwater sensor 707, the second rainwater sensor 708, the backup sensor, and the PLC control system in this invention are common knowledge in the field. Their working principles are well-known technologies, and the appropriate models are selected according to actual use. Therefore, the control methods and wiring layouts of the first waterproof electric telescopic pole 508, the second waterproof electric telescopic pole 601, the first rainwater sensor 707, the second rainwater sensor 708, the backup sensor, and the PLC control system will not be explained in detail.

[0060] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rainwater harvesting system based on municipal engineering, characterized in that, include: The outer shell (100) has a float area (105) and a diversion area (106) inside from top to bottom. The float area (105) and the diversion area (106) are separated by a partition (107). A diversion port (108) is provided in the middle of the partition (107). A float diversion assembly (300) is located in the axial region of the outer shell (100). The opening and closing of the diversion port (108) is controlled by the buoyancy of the rainwater. The float diversion assembly (300) includes a small float (301) and a large float (303). The small float (301) and the large float (303) are located in the diversion area (106) and the float area (105) respectively. The small float (301) and the large float (303) are fixedly connected by a connecting rod (302). A front-end protection component (500) is disposed at the upper end of the partition (107) and is used to filter rainwater for a short period of time before the float and the diversion port (108) are closed. It includes a mounting plate (501), which is fixedly installed at the upper end of the partition (107). The upper end of the mounting plate (501) is provided with a mounting groove (502). Two filter frames (507) are disposed inside the mounting groove (502). A first waterproof electric telescopic rod (508) is disposed on the side of the two filter frames (507) that are far apart from each other. The back-end processing component (600) is located at the upper opening of the float area (105) and is used to remove impurities between the small float (301) and the discharge port (108) when the front-end protection component (500) fails. It includes a crossbeam (602), the two ends of which are fixedly connected to the upper sides of the outer shell (100). A second waterproof electric telescopic rod (601) is fixedly installed on one side of the upper end of the crossbeam (602). A push plate (603) is fixedly connected to the telescopic end of the second waterproof electric telescopic rod (601). The bottom of the push plate (603) is adapted to the upper outer wall of the large float (303). A control component (700), located at the bottom center of the housing (100), is used to control the opening and closing times of the front-end protection component (500) and the back-end processing component (600). It includes a cylindrical housing (701) and a sealing column (706). The sealing column (706) is fixedly connected to the bottom center of a small float (301). The cylindrical housing (701) is fixedly connected to the bottom center of the housing (100). A discharge port (704) is provided at the bottom of the cylindrical housing (701). First rainwater sensors are respectively provided on both sides of the sidewall of the cylindrical housing (701). (707) and a second rain sensor (708). The first rain sensor (707) is connected to two first waterproof electric telescopic poles (508) via a PLC control system. The second rain sensor (708) is connected to the second waterproof electric telescopic pole (601) via a PLC control system. When the second rain sensor (708) detects rain, it transmits a signal to the PLC control system. The PLC control system will control the second waterproof electric telescopic pole (601) to automatically extend and retract once every 5-10 minutes thereafter.

2. The rainwater harvesting system based on municipal engineering according to claim 1, characterized in that: The outer shell (100) is a cylindrical structure. The side wall of the partition (107) is fixedly connected to the inner wall of the outer shell (100). The diversion port (108) is used to connect the float area (105) and the diversion area (106). The bottom center of the outer shell (100) is provided with an outlet (109) that is in communication with the diversion area (106). The side wall of the outer shell (100) is provided with an inlet (102) and a recovery port (103) that are in communication with the float area (105). The inlet (102) and the recovery port (103) are symmetrically distributed on both sides of the float area (105). The aperture of the inlet (102) is larger than 100 mm. The aperture of the overflow outlet (108) is provided. The bottom of the side wall of the outer shell (100) is also provided with a drain outlet (104) that is in communication with the overflow area (106). The upper end of the outer shell (100) is provided with an inspection port (101) that is in communication with the float area (105). The upper end of the inspection port (101) is provided with a protective cover (200). The bottom of the protective cover (200) is fixedly connected with a connecting plate (201). The connecting plate (201) is a ring structure. The outer diameter of the connecting plate (201) is equal to the inner diameter of the inspection port (101). The outer wall of the connecting plate (201) is threadedly engaged with the inner wall of the inspection port (101).

3. A rainwater harvesting system based on municipal engineering as described in claim 1, characterized in that: The connecting rod (302) passes through the diversion port (108). The upper outer wall of the small float (301) is adapted to the inner wall of the diversion port (108). The upper end of the large float (303) is fixedly connected to a guide rod (304). The centerlines of the connecting rod (302) and the guide rod (304) both pass through the center of the small float (301) and the large float (303). The upper end of the guide rod (304) is provided with a guide member (400), which is used to restrict the small float. (301) and the large float (303) move in the vertical direction. The guide (400) is a cylinder. The guide (400) is located in the middle of the crossbeam (602) and passes through the crossbeam (602). The outer wall of the guide (400) is welded and fixed to the crossbeam (602). The upper and lower ends of the guide (400) extend to the upper and lower sides of the crossbeam (602) respectively. A guide groove is provided at the axis of the guide (400). The guide groove slides and engages with the guide rod (304).

4. A rainwater harvesting system based on municipal engineering as described in claim 1, characterized in that: The front-end protection component (500) also includes a sealing plate (509), which is compatible with the mounting groove (502). The sealing plate (509) is fixed inside the mounting groove (502) by screws. A docking groove (510) is provided in the middle of the sealing plate (509). A central through groove (503) is provided in the middle of the mounting plate (501). Two filter frames (507) are symmetrically distributed on both sides of the central through groove (503). The length and width of the docking groove (510) are equal to the length and width of the central through groove (503). The minimum side length of the central through groove (503) is greater than the diameter of the discharge port (108). Sliding grooves (504) are provided on both sides of the upper end of the mounting groove (502). The sliding grooves (504) slide and fit with the filter frames (507). The sliding grooves (504) are used to accommodate the filter frames (507). The ends of the two sliding grooves (504) are connected to the central through groove (503). The upper end of the mounting groove (502) is provided with a fixing groove (505) at the ends of the two sliding grooves (504) that are far apart from each other. The fixing groove (505) is used to accommodate the first waterproof electric telescopic rod (508). The housing of the first waterproof electric telescopic rod (508) is fixed in the fixing groove (505) by screws. The mounting groove (502) has two connecting holes (506). The connecting holes (506) are used to connect the fixing groove (505) and the sliding groove (504). The connecting holes (506) are also used to accommodate the telescopic part of the first waterproof electric telescopic rod (508). The telescopic end of the first waterproof electric telescopic rod (508) is fixedly connected to the side wall of the filter frame (507). The bottom structure of the sealing plate (509) is the same as the upper structure of the mounting groove (502).

5. A rainwater harvesting system based on municipal engineering as described in claim 1, characterized in that: The filter frame (507) has a filter screen mounting hole (511), which is a semi-circular structure. A filter screen body (512) is fixedly installed on the inner wall of the filter screen mounting hole (511). The two filter frames (507) have semi-circular holes (513) at their close ends. The diameter of the semi-circular holes (513) is larger than the outer diameter of the connecting rod (302).

6. A rainwater harvesting system based on municipal engineering as described in claim 1, characterized in that: The telescopic end of the second waterproof electric telescopic rod (601) slides through the crossbeam (602) and extends to the bottom of the crossbeam (602). The bottom of the push plate (603) is adapted to the upper outer wall of the large float (303). A central hole (604) is provided at the center of the push plate (603). The axis of the central hole (604) is the same as the axis of the outer shell (100). The diameter of the central hole (604) is larger than the outer diameter of the guide (400).

7. A rainwater harvesting system based on municipal engineering as described in claim 2, characterized in that: The control component (700) further includes a fixing plate (702) and a threaded sleeve (705). The fixing plate (702) is an annular plate. The fixing plate (702) is located at the upper edge of the cylindrical shell (701) and is integrally formed with the cylindrical shell (701). The fixing plate (702) is fixed to the bottom of the outer shell (100) by screws. There are two threaded sleeves (705). The two threaded sleeves (705) are symmetrically distributed on both sides of the outer wall of the cylindrical shell (701). The interior of the threaded sleeve (705) is in communication with the interior of the cylindrical shell (701). The outer walls of the shells of the first rain sensor (707) and the second rain sensor (708) are provided with external threads that engage with the inner threads of the threaded sleeve (705).

8. A rainwater harvesting system based on municipal engineering as described in claim 7, characterized in that: The bottom of the outer casing (100) is provided with a first sealing groove (110) on the outer ring of the outlet (109). The first sealing groove (110) is an annular structure, and the axis of the first sealing groove (110) coincides with the axis of the outlet (109). The upper surface of the fixing plate (702) is provided with a second sealing groove (703). The structure and size of the second sealing groove (703) are the same as those of the first sealing groove (110), and the axis of the second sealing groove (703) coincides with the axis of the outlet (109).

9. A rainwater harvesting system based on municipal engineering as described in claim 2, characterized in that: The sealing column (706) slides and fits with the outlet (109). The distance between the small float (301) and the overflow port (108) is greater than the length of the sealing column (706). A circular hole is opened inside the cylindrical shell (701). The upper end of the circular hole is open and aligned with the outlet (109). The diameter of the circular hole is equal to the diameter of the outlet (109). The diameter of the discharge port (704) is greater than 50 mm.

10. A rainwater harvesting system based on municipal engineering as described in claim 1, characterized in that: A guide plate (111) is fixedly installed at the bottom of the partition (107). The guide plate (111) has a funnel-shaped structure to ensure that the rainwater flowing out from the diversion port (108) flows down to the center of the diversion area (106), so that the rainwater can enter the interior of the cylindrical shell (701) more quickly. The axis of the guide plate (111) coincides with the axis of the outer shell (100). The diameter of the opening at the bottom of the guide plate (111) is larger than the diameter of the small float (301).

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