Rainwater discarding and recycling device and rainwater treatment method

Abstract

The invention provides a rainwater discarding and recycling device and a rainwater treatment method.The rainwater discarding and recycling device comprises a well chamber main body, an overflow weir is arranged in the well chamber main body, the well chamber main body is divided into a discarding part and a recycling part which are communicated with each other, and the discarding part is provided with a first cover plate provided with water permeable holes; the discarding part is further provided with an overflow pipe, the inlet end of the overflow pipe is higher than the top of the overflow weir, the overflow pipe is used for discharging rainwater flowing back into the discarding part from the recycling part, the discarding part is provided with a discarding pipe, and the recycling part is provided with a recycling pipe. The invention provides a rainwater treatment method. Initial rainwater is discharged through a discarding pipe; during continuous rainfall, the rainwater can overflow to the recycling part so as to be conveyed to a recycling point; and when the recycling part is full of rainstorm, the rainwater returns to the discarding part through the upside of the overflow weir and is discharged through the overflow pipe. The system has the beneficial effects that the multiple functions of rainwater discarding, collecting, recycling, full storage and dredging are integrated, the construction complexity is reduced, and the space utilization rate and waterlogging prevention and control capacity of a rainwater system are improved.

Description

Technical Field

[0001] This invention belongs to the field of rainwater treatment technology, and in particular relates to a rainwater diversion and reuse device and a rainwater treatment method. Background Technology

[0002] In existing technologies, rainwater treatment systems typically employ multiple independent units or split structures for both runoff diversion and reuse. This results in large land areas, complex construction, and a disconnect between the two treatment functions. Furthermore, traditional rainwater reuse systems often focus on rainwater harvesting, neglecting the drainage of water once the reuse system is full. Failure to drain water in a timely manner can easily lead to urban flooding. These technologies present several technical challenges, including dispersed layout, limited functionality, low land resource utilization efficiency, and insufficient capacity to handle peak rainfall. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a rainwater diversion and reuse device and a rainwater treatment method, which is particularly suitable for sites with limited space. It adopts an integrated structure and can simultaneously realize multiple functions such as initial rainwater diversion, subsequent collection and reuse, and flood prevention.

[0004] The technical solution adopted in this invention is: a rainwater diversion and reuse device, including a well chamber body, an overflow weir is provided inside the well chamber body, the overflow weir divides the well chamber body into an interconnected diversion section and a reuse section, a first cover plate is provided on the top of the diversion section and the first cover plate has water-permeable holes to introduce rainwater, the diversion section is also provided with an overflow pipe and the inlet end of the overflow pipe is higher than the top of the overflow weir, the overflow pipe is used to discharge the rainwater that flows back from the reuse section to the diversion section, the diversion section is provided with a diversion pipe and the reuse section is provided with a reuse pipe.

[0005] Furthermore, the rainwater diversion and reuse device also includes a filter screen, which is connected to the diversion section.

[0006] Furthermore, a regulating valve is installed on the reuse pipe to control its flow rate.

[0007] Furthermore, a booster pump is installed within the recycling section.

[0008] Furthermore, the diversion section includes a first well wall and a first bottom plate connected to each other, and a first cover plate is connected to the top of the first well wall. The reuse section includes a second cover plate, a second well wall, and a second bottom plate connected in sequence. The second cover plate is connected to the first well wall, and the first bottom plate is connected to the second well wall, with an overflow weir provided at the connection.

[0009] Furthermore, the diversion pipe is connected to the first well wall, and the inlet end of the diversion pipe is lower than the top of the overflow weir.

[0010] Furthermore, the reuse pipe is connected to the second well wall, and the inlet end of the reuse pipe is lower than the top of the overflow weir.

[0011] Furthermore, the present invention also provides a rainwater treatment method, comprising the following steps:

[0012] In the initial stage of rainfall, rainwater enters the diversion section through the first cover plate and is discharged through the diversion pipe;

[0013] When the water level in the diversion section reaches the top of the overflow weir, the rainwater overflows into the reuse section and is transported to the reuse point through the reuse pipe;

[0014] When the reuse section is full, rainwater returns to the diversion section above the overflow weir and is discharged through the overflow pipe.

[0015] The advantages and positive effects of this invention are as follows: by adopting the above technical solution, the multiple functions of rainwater diversion, collection and reuse, and full storage and drainage of the reuse section are integrated into one structure, reducing the equipment footprint and construction complexity; it has the advantages of improving the space utilization rate and flood prevention capability of the rainwater system, and facilitating construction. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of one embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of the first cover plate in one embodiment of the present invention;

[0018] In the picture:

[0019] 1. Diversion section; 2. Reuse section; 3. Flow passage; 4. Second cover plate; 5. Second well wall; 6. Second bottom plate; 7. Diversion pipe; 8. Reuse pipe; 9. Overflow pipe; 10. Water permeable hole; 11. Overflow weir; 12. Filter screen; 13. Regulating valve; 14. Booster pump; 15. First cover plate; 16. First well wall; 17. First bottom plate. Detailed Implementation

[0020] The embodiments of the present invention will now be described with reference to the accompanying drawings. The described embodiments are only some embodiments of the invention, and not all embodiments.

[0021] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar units or units having the same or similar functions throughout.

[0022] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. In the description of the present invention, it should be understood that terms such as "installation," "connection," and "fixing" should be interpreted broadly, and can refer to direct connection, installation, or fixing, or indirect connection, installation, or fixing. The present invention does not impose any limitations in this regard.

[0023] like Figures 1 to 2 The diagram illustrates an embodiment of a rainwater diversion and reuse device according to the present invention. It includes a main chamber with an overflow weir 11 inside, dividing the main chamber into a diversion section 1 and a reuse section 2 that are interconnected. The top of the diversion section 1 is fitted with a first cover plate 15, which has permeable holes 10 to allow rainwater to enter. The diversion section 1 also includes an overflow pipe 9, with its inlet end higher than the top of the overflow weir 11. The overflow pipe 9 is used to discharge excess rainwater that flows back from the reuse section 2 through the overflow weir 11 into the diversion section 1 during heavy rain. The diversion section 1 also includes a diversion pipe 7 for discharging initially slightly polluted rainwater, and the reuse section 2 includes a reuse pipe 8 for outputting reused rainwater. Preferably, the overflow weir 11 has a thickness of 200 mm. This embodiment can discharge slightly polluted rainwater, recover overflow rainwater after sedimentation, and discharge excess rainwater that the reuse section 2 cannot hold through the overflow pipe 9, reducing the risk of urban flooding.

[0024] In this embodiment, the rainwater diversion and reuse device also includes a filter screen 12, which is connected to the diversion section 1. The filter screen 12 is used to intercept debris such as leaves and gravel carried by the rainwater, preventing blockage of subsequent pipes and equipment, and reducing maintenance frequency and cost. Preferably, the filter screen 12 is detachably connected to the well wall of the diversion section 1 and can be replaced periodically to ensure water flow efficiency.

[0025] In this embodiment, a regulating valve 13 is installed on the reuse pipe 8 to control its flow rate. The regulating valve 13 has a remote control function, which enables precise and rapid management of the rainwater reuse process, improving the system's automation level and response efficiency. The remote control of the regulating valve 13 is existing technology and will not be described further in this invention. Preferably, the regulating valve 13 is fully open in no more than 30 seconds.

[0026] In this embodiment, a booster pump 14 is installed in the rainwater reuse unit 2. The booster pump 14 provides power for rainwater reuse. Preferably, there are multiple booster pumps 14, which can serve as backups for each other, improving system reliability and allowing for flexible start-up and shutdown based on water volume, thus achieving energy-saving operation.

[0027] In this embodiment, the spatial position within the diversion section 1 is higher than that within the reuse section 2. The diversion section 1 includes a first well wall 16 and a first bottom plate 17 connected to each other, and a first cover plate 15 connected to the top of the first well wall 16. The reuse section 2 includes a second cover plate 4, a second well wall 5, and a second bottom plate 6 connected in sequence. The second cover plate 4 is connected to the first well wall 16, and the first bottom plate 17 is connected to the second well wall 5, with an overflow weir 11 provided at the connection. The connection method can be flexibly selected based on the general technical knowledge of those skilled in the art, such as welding or mechanical connection. Preferably, the height of the second bottom plate 6 is lower than that of the first bottom plate 17, and the height of the second cover plate 4 is lower than that of the first cover plate 15. The height of the second cover plate 4 is higher than the top height of the overflow weir 11, and a flow passage 3 is formed between the second cover plate 4 and the top of the overflow weir 11, allowing the diversion section 1 and the reuse section 2 to communicate through the flow passage. Preferably, the distance between the second cover plate 4 and the top of the overflow weir 11 is 400mm. The height of the second bottom plate 6 is also lower than the top height of the overflow weir 11. In this embodiment, the overflow from the diversion section 1 to the reuse section 2, as well as the excess discharge from the reuse section 2 back to the diversion section 1, are all completed naturally through the same flow channel 3. The water flow path is smooth and reasonable, and natural overflow can be achieved without complicated control.

[0028] Preferably, the main body of the well chamber is made of corrosion-resistant material, which can be fiberglass, i.e., the first well wall 16, the first bottom plate 17, the second cover plate 4, the second well wall 5, the second bottom plate 6 and the overflow weir 11 are all made of fiberglass.

[0029] In this embodiment, the diversion pipe 7 is connected to the first well wall 16 at its inlet end. The inlet end of the diversion pipe 7 is lower than the top of the overflow weir 11 by a first preset height, which is 50mm. Preferably, the inlet end is higher than the bottom plate 17 of the diversion section 1 by a second preset height, which is also 50mm. By limiting the relative height between the inlet end of the diversion pipe 7 and the top of the overflow weir 11, it is ensured that the initial rainwater can be fully diverted, while setting clear hydraulic conditions for the rainwater overflow to the reuse section 2, thus optimizing the water quality separation effect.

[0030] In this embodiment, the reuse pipe 8 is connected to the second well wall 5 at its inlet end, which is lower than the top of the overflow weir 11. Preferably, the inlet end of the reuse pipe 8 is higher than the second base plate 6 at the bottom of the reuse section 2. The high-level connection of the reuse pipe 8 and the low-level design of the second base plate 6, combined with the power provided by the booster pump 14, ensure the effective water storage volume of the reuse section by utilizing the water level difference.

[0031] Preferably, the bottom of the overflow pipe 9 is flush with the bottom of the second cover plate 4. Setting the bottom of the overflow pipe 9 at the same height as the bottom of the second cover plate 4 provides the system with an efficient emergency discharge outlet for excess rainwater. When the reuse section 2 is full, excess rainwater can be discharged through the overflow pipe 9 immediately, greatly enhancing the device's ability to cope with rainstorms and prevent flooding.

[0032] This embodiment ensures that the initial rainwater can be effectively diverted by precisely setting the relative height between each pipe opening and the top of the overflow weir 11, while also ensuring that the rainwater overflowing to the reuse section has sufficient cleanliness, thus optimizing the diversion and collection effect.

[0033] On the other hand, the present invention also provides a rainwater treatment method, comprising the following steps:

[0034] Construction and establishment of the rainwater diversion and reuse device: The main body of the fiberglass manhole is prefabricated in the factory; the foundation pit is excavated at the construction site and the foundation cushion is treated; the prefabricated integrated manhole body is hoisted into place; the diversion pipe 7, reuse pipe 8 and overflow pipe 9 are connected to their respective external rainwater pipe network or reuse point pipeline system; a filter screen 12 is installed in the diversion section 1, which can be a hanging net and can be detachably hung on the manhole wall of the diversion section 1; a reuse booster pump 14 is installed in the reuse section 2, and an electric regulating valve 13 is installed on the reuse pipe 8; the foundation pit is backfilled; the control lines of the regulating valve 13 and the booster pump 14 are connected to the central control system, and the system is debugged.

[0035] Initial diversion stage: In the early stage of rainfall, rainwater enters the diversion section 1 through the first cover plate 15 and is discharged through the diversion pipe 7;

[0036] Rainwater reuse stage: When continuous rainfall causes the water level in the diversion section 1 to reach the top of the overflow weir 11, the rainwater overflows to the reuse section 2. When the water level in the reuse section 2 reaches a preset height, the regulating valve 13 is opened, and the rainwater is recovered through the reuse pipe 8 and transported to the reuse point. The central control system controls the opening or closing of the regulating valve 13 according to the water level in the reuse section 2, which is existing technology. For example, a water level detector is installed at a preset height in the second well wall 5 and the detection result is transmitted to the central control system. The central control system controls the opening or closing of the regulating valve 13 according to the detection result. This invention will not discuss this in detail.

[0037] Excess overflow stage: When the reuse section 2 is full due to heavy rain, the rainwater returns to the diversion section 1 through the overflow channel 3 above the overflow weir 11, and the excess rainwater can be discharged through the overflow pipe 9.

[0038] This embodiment utilizes an integrated structural design to divert rainwater, integrating the functions of water diversion, collection and reuse, and overflow protection into a single main chamber. The compact structure effectively reduces the equipment's footprint and construction complexity. An overflow weir 11 enables automatic diversion between the water diversion section 1 and the reuse section 2. Polluted rainwater is diverted in the early stages of rainfall, while clean rainwater overflows to the reuse section 2 for resource utilization. Simultaneously, when the reuse section 2 is full, rainwater can flow back to the water diversion section 1 above the overflow weir 11 and be promptly discharged through the elevated overflow pipe 9. This achieves coordinated operation of system functions within a limited space, significantly improving the rainwater system's space utilization efficiency, operational reliability, and flood prevention capabilities. This embodiment can handle diverse treatments under varying rainfall intensities, connecting water diversion, collection, and flood prevention into a highly efficient self-operating rainwater treatment system. Compared to traditional independent, separate structures, it improves space utilization. The main chamber can be prefabricated as needed, and compared to traditional cast-in-place processes, it improves construction efficiency and reduces construction complexity.

[0039] The embodiments of the present invention have been described in detail above, but the content described is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A rainwater reject and reuse device comprising a sump body, characterised in that: The well chamber body is internally provided with an overflow weir, which divides the well chamber body into a runoff part and a reuse part in communication with each other. The top of the runoff part is provided with a first cover plate, which is provided with water-permeable holes for introducing rainwater. The runoff part is further provided with an overflow pipe, the inlet end of which is higher than the top of the overflow weir. The overflow pipe is used to discharge rainwater flowing from the reuse part to the runoff part. The runoff part is provided with a runoff pipe, and the reuse part is provided with a reuse pipe.

2. The rainwater reject and reuse device according to claim 1, characterized in that: The runoff part is further provided with a filter screen.

3. The rainwater reject and reuse device according to claim 1, wherein: The reuse pipe is provided with an adjusting valve to control its flow.

4. The rainwater reject and reuse device of claim 1, wherein: The reuse part is provided with a pressurizing pump.

5. The rainwater reject and reuse device according to any one of claims 1-4, characterized in that: The runoff part comprises a first well wall and a first bottom plate connected with each other. The first cover plate is connected with the top of the first well wall. The reuse part comprises a second cover plate, a second well wall and a second bottom plate connected with each other. The second cover plate is connected with the first well wall. The first bottom plate is connected with the second well wall, and the connecting part is provided with the overflow weir.

6. The rainwater reject and reuse device according to claim 5, wherein: The runoff pipe is connected with the first well wall, and the inlet end of the runoff pipe is lower than the top of the overflow weir.

7. The rainwater reject and reuse device of claim 5, wherein: The reuse pipe is connected with the second well wall, and the inlet end of the reuse pipe is lower than the top of the overflow weir.

8. A rainwater treatment method using the rainwater reject and reuse device according to any one of claims 1 to 7, characterized by, The method comprises the following steps: In the early stage of rainfall, rainwater enters the runoff part through the first cover plate and is discharged through the runoff pipe. When the water level in the runoff part reaches the top of the overflow weir, rainwater overflows into the reuse part and is transported to a reuse point through the reuse pipe. When the reuse part is full, rainwater returns to the runoff part above the overflow weir and is discharged through the overflow pipe.

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