Urban rainwater collection, purification and recycling device

Abstract

The application discloses a kind of urban rainwater collection purification recycling devices, including multistage impurity removal type water collection mechanism buried below ground, multicore type water filter mechanism and snail type water storage mechanism, three are communicated by water pipe system, and multistage impurity removal type water collection mechanism and multicore type water filter mechanism are communicated with pumping pipe system, and the upper end of multistage impurity removal type water collection mechanism is constructed with the water collection ditch of snail line form, and the upper end of multistage impurity removal type water collection mechanism is communicated with the water collection ditch.The application can efficiently, step by step, remove impurities in rainwater, ensure that rainwater is fully disinfected, reduce the investment and maintenance cost of equipment, so that the utilization rate of collected rainwater is improved.The application is suitable for the technical field of rainwater collection and recycling in city.

Description

Technical Field

[0001] This invention belongs to the technical field of rainwater harvesting in municipal engineering, specifically, it relates to an urban rainwater harvesting, purification and recycling device. Background Technology

[0002] Currently, rainwater harvesting and reuse is a measure to address water scarcity and is applied in urban planning. It not only solves urban flooding caused by heavy rains but also provides supplementary water resources for public facilities (excluding drinking water), commonly used for street cleaning, park irrigation, and vehicle washing. However, existing rainwater harvesting processes often result in rainwater containing large amounts of impurities, organic matter, and bacteria. Due to incomplete separation of these impurities and organic matter, and the high temperatures during rainfall, bacteria proliferate rapidly, leading to deterioration of the collected rainwater quality, reduced storage time, and ineffective recycling. To effectively disinfect rainwater, ultraviolet (UV) disinfection is commonly used. This method requires controlling the rainwater flow, and the UV lamps need a continuous power supply, requiring regular charging. Furthermore, the disinfection effect is poor during periods of heavy rainfall. Another disinfection method is to add disinfectant to the collected rainwater to disinfect bacteria and microorganisms. This method is less expensive, but the disinfectant cannot be fully mixed in the rainwater, so it cannot achieve the purpose of thorough disinfection. Summary of the Invention

[0003] This invention provides an urban rainwater collection, purification and recycling device to efficiently and progressively remove impurities from rainwater, ensure thorough disinfection of bacteria and microorganisms in the rainwater, reduce equipment investment and maintenance costs, and improve the utilization rate of collected rainwater.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] An urban rainwater collection, purification, and recycling device includes a multi-stage impurity removal water collection mechanism, a multi-core water filtration mechanism, and a spiral-shaped water storage mechanism buried underground. The three are connected by a water supply pipeline system. The multi-stage impurity removal water collection mechanism and the multi-core water filtration mechanism are connected to a sludge pumping pipeline system. A spiral-shaped water collection channel is constructed at the upper end of the multi-stage impurity removal water collection mechanism, and the water collection channel is connected to the upper end of the multi-stage impurity removal water collection mechanism.

[0006] Furthermore, the water collection channel includes a spiral-shaped channel body constructed on the ground, with an inlet channel at the center of the channel body that communicates with a multi-stage impurity removal and water collection mechanism, and the inner end of the channel body is connected to the inlet channel.

[0007] Furthermore, a seepage unit extending along the spiral shape of the water channel body is installed on the upper part of the water channel body. The seepage unit includes a primary filter layer, a secondary filter layer and a tertiary filter layer arranged sequentially from top to bottom. The water passage gap of the primary filter layer, the secondary filter layer and the tertiary filter layer decreases downward in the vertical direction.

[0008] Furthermore, the multi-stage impurity removal water collection mechanism includes a vertical water collection well excavated below the water collection channel. Multiple water filtering and impurity guiding components are connected sequentially in the vertical direction within the vertical water collection well. The sludge pumping pipe system is connected to the bottom of the well through the water filtering and impurity guiding components. A sludge collection pool is constructed at the lower outer periphery of the vertical water collection well. The sludge collection pool is connected to the sludge pumping pipe system. A sludge guiding channel extending vertically is constructed on the peripheral wall of the vertical water collection well. The sludge guiding channel connects the sludge collection pool and the sludge discharge port of each water filtering and impurity guiding component.

[0009] Furthermore, the water filtration and impurity guiding component includes a filter disc that protrudes upward in the middle, a spiral-shaped guide vane is constructed on the upper surface of the filter disc, a blocking edge is formed at the outer edge of the filter disc, the sludge discharge port is opened on the blocking edge and communicates with the sludge inlet on the sludge guiding channel, and a connecting pipe is constructed at the center of the filter disc, with two connecting pipes in two adjacent filter discs connected to each other.

[0010] Furthermore, the multi-core water filtration mechanism includes multiple vertical water filtration components disposed within the water filtration vessel, a water collection chamber is formed at the lower part of the water filtration vessel, the water collection chamber is connected to the water inlet end of the spiral water storage mechanism, the upper end of each vertical water filtration component is connected to the water supply pipeline system, and the lower end of each vertical water filtration component is connected to the sludge pumping pipeline system.

[0011] Furthermore, the vertical water filtration component includes, from the inside out, an inner filter cylinder, a cylindrical filter element, and an outer filter cylinder. A water inlet cover is detachably connected to the upper end of the outer filter cylinder, and the water inlet cover is connected to the water supply pipeline system. A sludge collection cover is detachably connected to the lower end of the outer filter cylinder, and the sludge collection cover is connected to the sludge extraction pipeline system.

[0012] Furthermore, guide vanes are constructed on the inner peripheral wall of the inner filter cylinder, and the guide vanes extend spirally from the upper end of the inner filter cylinder along the axis of the inner filter cylinder to the lower end of the inner filter cylinder.

[0013] Furthermore, the spiral-shaped water storage mechanism includes a cylindrical water storage tank, the bottom wall of which is concave downwards. A water-guiding grid extending in a spiral shape is fixed to the water storage tank. The inner cavity of the water storage tank is divided into spiral-shaped water-guiding channels by the water-guiding grid. The water-guiding channels extend to the center of the inner cavity of the water storage tank. A central pipe is installed at the center of the water storage tank, and the lower end of the central pipe extends to the lower part of the water storage tank.

[0014] Furthermore, multiple disinfection columns are installed at the upper end of the water storage tank, and the multiple disinfection columns are spaced apart in the water guiding channel along the extension direction of the water guiding channel; each disinfection column includes a material placement hole pipe extending vertically into the water guiding channel, into which chlorine tablets are placed, and a sealing cap is detachably connected to the upper end of the material placement hole pipe.

[0015] The present invention, by employing the aforementioned structure, achieves a technological advancement compared to existing technologies in the following ways: The present invention collects rainwater runoff from the surface via a collection channel. The rainwater enters the collection channel and gradually flows along a spiral path into a multi-stage impurity removal collection mechanism. During this flow, some impurities in the rainwater are deposited at the bottom of the collection channel. Upon entering the multi-stage impurity removal collection mechanism, the impurities are separated through multiple stages, and the separated impurities are collected independently. Smaller impurities that are not separated are deposited on the bottom wall of the multi-stage impurity removal collection mechanism. The rainwater, after impurity separation within the multi-stage impurity removal collection mechanism, is transported through a water supply system to a multi-core filtration mechanism. The multi-core filtration mechanism simultaneously filters the rainwater using multiple filter elements, removing residual impurities and organic matter. Furthermore, the filtration efficiency is not affected by the amount of rainwater. Rainwater filtered by the multi-core filtration system contains negligible impurities, but still contains a significant proportion of bacteria and microorganisms. The rainwater is then transported from the multi-core filtration system to a spiral-shaped storage system. Within this system, the rainwater flows in a spiral pattern, and during this flow, disinfectant is continuously and periodically added at designated points along the flow direction, ensuring thorough disinfection of the rainwater and eliminating bacteria and microorganisms. This invention allows for periodic dredging of the collection channel, which is easily facilitated due to its surface location. Furthermore, over long-term operation, a certain amount of silt will accumulate in the multi-stage impurity removal collection system and the multi-core filtration system. This silt can be removed periodically through a dredging pipe system. In summary, this invention efficiently and progressively removes impurities from rainwater, ensuring thorough disinfection of bacteria and microorganisms, reducing equipment investment and maintenance costs, and increasing the utilization rate of collected rainwater. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0017] In the attached diagram:

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention;

[0019] Figure 2 This is a side view of the structure of an embodiment of the present invention with the spiral water storage mechanism removed;

[0020] Figure 3 This is a schematic diagram of the structure of the water collection channel and the multi-stage impurity removal water collection mechanism according to an embodiment of the present invention;

[0021] Figure 4 for Figure 3 An axial sectional view of the structure shown.

[0022] Figure 5 This is a schematic diagram of the infiltration unit in the water collection channel according to an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the water collection channel body in an embodiment of the present invention;

[0024] Figure 7 This is a partial structural schematic diagram of the multi-stage impurity removal and water collection mechanism according to an embodiment of the present invention;

[0025] Figure 8 This is a partial axial structural cross-sectional view of the multi-stage impurity removal and water collection mechanism according to an embodiment of the present invention;

[0026] Figure 9 This is a schematic diagram of the water filtration and impurity guiding component in the multi-stage impurity removal water collection mechanism of this invention.

[0027] Figure 10 This is a schematic diagram of the multi-core water filtration mechanism according to an embodiment of the present invention;

[0028] Figure 11 This is an axial structural cross-sectional view of the multi-core water filtration mechanism according to an embodiment of the present invention;

[0029] Figure 12 This is a schematic diagram of the vertical water filtration component in the multi-core water filtration mechanism of this invention.

[0030] Figure 13 This is a schematic diagram of the spiral water storage mechanism according to an embodiment of the present invention;

[0031] Figure 14 This is an axial structural cross-sectional view of the spiral water storage mechanism according to an embodiment of the present invention;

[0032] Figure 15 This is a partial structural schematic diagram of the spiral-shaped water storage mechanism according to an embodiment of the present invention;

[0033] Figure 16 This is a schematic diagram of the disinfection column tube in the spiral-shaped water storage mechanism of this invention.

[0034] Components labeled: 100-Water collection channel, 101-Primary filter layer, 102-Secondary filter layer, 103-Tertiary filter layer, 104-Water channel body, 105-Inlet channel, 200-Multi-stage impurity removal water collection mechanism, 201-Vertical water collection well, 202-Silt guiding channel, 203-Silt inlet, 204-Filter and impurity guiding component, 2041-Filter disc, 2042-Blocking edge, 2043-Flow guide 2044-Sludge discharge port, 2045-Connecting pipe, 205-Sludge collection tank, 206-Sludge collection chamber, 207-Water collection chamber, 300-Multi-core water filtration mechanism, 301-Water filter vessel, 302-Vessel cavity, 303-Outer filter cartridge, 304-Cylindrical filter element, 305-Inner filter cartridge, 306-Sludge guide vanes, 307-Water inlet hood, 308-Sludge collection hood, 309-Water collection chamber, 400-Snail-shaped storage tank Water system, 401-Water storage tank, 402-Water guide bar, 403-Water guide channel, 404-Water inlet connector, 405-Central pipe, 406-Disinfection column pipe, 4061-Material inlet pipe, 4062-Connecting connector, 4063-Sealing cap, 4064-Operating handwheel, 500-Water supply piping system, 501-Water pump, 502-Main pumping pipe, 503-First pumping branch pipe, 504-Second 505 - Water supply main pipe, 506 - Ring water supply pipe, 507 - Water supply branch pipe, 508 - Connecting pipe, 600 - Silt removal pipe system, 601 - Silt removal main pipe, 602 - Silt removal bottom pipe, 603 - Bypass pipe, 604 - Conducting pipe, 605 - First ring sludge removal pipe, 606 - First sludge removal branch pipe, 607 - Transfer pipe, 608 - Second ring sludge removal pipe, 609 - Second sludge removal branch pipe. Detailed Implementation

[0035] The preferred embodiments of the present invention will now be described with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0036] This invention discloses an urban rainwater collection, purification, and recycling device, such as... Figure 1-16As shown, the system includes a water collection channel 100, a multi-stage impurity removal water collection mechanism 200, a multi-core water filtration mechanism 300, a spiral-shaped water storage mechanism 400, a water conveyance pipeline system 500, and a sludge removal pipeline system 600. The multi-stage impurity removal water collection mechanism 200, the multi-core water filtration mechanism 300, and the spiral-shaped water storage mechanism 400 are buried underground and connected to each other via the water conveyance pipeline system 500. Both the multi-stage impurity removal water collection mechanism 200 and the multi-core water filtration mechanism 300 are connected to the sludge removal pipeline system 600. The water collection channel 100 is constructed above the multi-stage impurity removal water collection mechanism 200. The water collection channel 100 extends in a spiral shape, and its outlet end is connected to the upper end of the multi-stage impurity removal water collection mechanism 200. The working principle and advantages of this invention are as follows: This invention collects rainwater from surface runoff through a collection channel 100. The rainwater enters the collection channel 100 and gradually flows along a spiral path into a multi-stage impurity removal collection mechanism 200. During the flow, some impurities in the rainwater are deposited at the bottom of the collection channel 100. After entering the multi-stage impurity removal collection mechanism 200, the impurities in the rainwater are separated in multiple stages, and the separated impurities are collected independently. Smaller impurities that are not separated are deposited on the bottom wall of the multi-stage impurity removal collection mechanism 200. The rainwater after impurity separation in the multi-stage impurity removal collection mechanism 200 is transported to a multi-core water filtration mechanism 300 through a water delivery pipe system 500. The multi-core water filtration mechanism 300 simultaneously filters the rainwater using multiple filter elements, removing residual impurities and organic matter from the rainwater. Moreover, the filtration and purification efficiency is not reduced by the amount of rainwater. Rainwater filtered by the multi-core filtration mechanism 300 contains negligible impurities, but still contains a significant proportion of bacteria and microorganisms. The rainwater is then transported from the multi-core filtration mechanism 300 to the spiral-shaped water storage mechanism 400. Within the spiral-shaped water storage mechanism 400, the rainwater flows in a spiral pattern. During this flow, disinfectant is continuously and periodically added at fixed points along the flow direction, ensuring thorough disinfection of the rainwater and guaranteeing complete elimination of bacteria and microorganisms. This invention allows for periodic dredging of the collection channel 100, which is easily facilitated due to its surface location. Furthermore, over long-term operation, a certain amount of silt will accumulate in the multi-stage impurity removal collection mechanism 200 and the multi-core filtration mechanism 300. This silt can be removed periodically via the sludge removal pipe system 600. In summary, this invention can efficiently and progressively remove impurities from rainwater, ensuring thorough disinfection of bacteria and microorganisms in the rainwater, reducing equipment investment and maintenance costs, and improving the utilization rate of collected rainwater.

[0037] As a preferred embodiment of the present invention, such as Figure 3-6As shown, the water collection channel 100 includes a channel body 104, which is constructed on the ground and extends in a spiral shape. An inlet channel 105 is provided at the center of the channel body 104, connecting the inner end of the channel body 104 to the inlet channel 105, which in turn connects to a multi-stage impurity removal and water collection mechanism 200. In this embodiment, the depth of the channel body 104 gradually increases inward along its spiral shape. Thus, when rainwater flows into the channel body 104, it flows inward along the extension direction of the channel body 104 and converges into the multi-stage impurity removal and water collection mechanism 200 through the inlet channel 105. During the flow of rainwater, due to the increased flow distance and the spiral flow direction, impurities in the rainwater gradually deposit on the bottom wall of the channel body 104, significantly reducing the amount of impurities in the rainwater entering the multi-stage impurity removal and water collection mechanism 200. In this embodiment, to isolate most impurities outside the water channel body 104, the following measures are taken: a seepage unit is installed on the upper part of the water channel body 104, extending along the spiral shape of the water channel body 104. The seepage unit includes a primary filter layer 101, a secondary filter layer 102, and a tertiary filter layer 103 arranged sequentially from top to bottom, with the water passage gap between the primary filter layer 101, the secondary filter layer 102, and the tertiary filter layer 103 decreasing vertically downwards. The primary filter layer 101, secondary filter layer 102, and tertiary filter layer 103 are all structures made of permeable materials. Specifically, they are all composed of permeable bricks. The permeable bricks constituting the primary filter layer 101 have the strongest permeability and the largest water passage gaps. The permeable bricks constituting the secondary filter layer 102 have weaker permeability and slightly smaller water passage gaps. Finally, the permeable bricks constituting the tertiary filter layer 103 have the weakest permeability and the smallest water passage gaps. Thus, under the action of the infiltration units, impurities in rainwater are removed step by step. Furthermore, due to the spiral shape of the infiltration units, impurities isolated by the primary filter layer 101 are prevented from accumulating at the upper end of the water channel body 104, thus avoiding obstruction of rainwater infiltration.

[0038] As a preferred embodiment of the present invention, such as Figure 4 , 7As shown in Figure 8, the multi-stage impurity removal water collection mechanism 200 includes a vertical water collection well 201, a silt collection tank 205, and multiple water filtering and impurity guiding components 204. The vertical water collection well 201 is excavated below the water collection channel 100, and its upper end is connected to the water inlet channel 105. The multiple water filtering and impurity guiding components 204 are connected sequentially along the direction and are all disposed within the vertical water collection well 201. A water collection cavity 207 is formed in the lower part of the vertical water collection well 201, and the silt pumping system 600 is connected to the bottom of the well (the lower area of ​​the water collection cavity 207) through the water filtering and impurity guiding components 204. In this embodiment, the silt collection tank 205 is coaxially constructed at the lower outer periphery of the vertical water collection well 201, and a silt collection cavity 206 is formed within the silt collection tank 205. The silt pumping system 600 is connected to the silt collection cavity 206. A silt-guiding channel 202 is constructed on the peripheral wall of the vertical water collection well 201. This channel extends vertically and connects to the silt collection chamber 206 and the discharge ports 2044 of each filter and impurity-guiding component 204. This ensures that silt and other impurities discharged from the discharge ports 2044 of the filter and impurity-guiding components 204 enter the silt collection chamber 206 through the silt-guiding channel 202. The working principle and advantages of this embodiment are as follows: rainwater enters the vertical water collection well 201 through the inlet channel 105 and passes sequentially through each filter and impurity-guiding component 204 under gravity. The filter and impurity-guiding components 204 filter impurities in the rainwater step by step. The filtered impurities gradually enter the silt collection chamber 206 through the silt-guiding channel 202, thereby achieving impurity separation. Furthermore, the use of multiple filter and impurity-guiding components 204 improves the filtration effect.

[0039] As a preferred embodiment of the present invention, such as Figure 7-9As shown, the water filtration and impurity guiding component 204 includes a filter disc 2041 that protrudes upward in the middle. A spiral-shaped guide vane 2043 is constructed on the upper surface of the filter disc 2041. A baffle 2042 is formed at the outer edge of the filter disc 2041. The aforementioned discharge port 2044 is opened on the baffle 2042, and the discharge port 2044 is interconnected with the inlet port 203 on the sludge guiding channel 202. A connecting pipe 2045 is constructed at the center of the filter disc 2041, and two connecting pipes 2045 in two adjacent filter discs 2041 are connected to each other. This allows the connecting pipe 2045 of the uppermost filter disc 2041 to connect with the connecting pipe 2045 of the lowermost filter disc 2041. The connecting pipe 2045 of the uppermost filter disc 2041 is connected to the sludge extraction pipe system 600, and the connecting pipe 2045 of the lowermost filter disc 2041 extends into the lower part of the water collection chamber 207. In this way, by controlling the sludge extraction pipe system 600, it can extract the sludge accumulated at the bottom of the water collection chamber 207 through the sequentially connected connecting pipes 2045. The working principle and advantages of this embodiment are as follows: When rainwater falls on the filter disc 2041, part of the rainwater falls directly from the filter disc 2041 to the next filter disc 2041; another part of the rainwater flows along the spiral-shaped channel formed by the guide plate 2043. During the flow, impurities are gradually filtered out and remain in the spiral-shaped channel. During the continuous flow and flushing of rainwater, because the middle of the filter disc 2041 is raised upward, impurities will gradually move outward along the spiral-shaped channel and enter the guide channel 202 through the sludge discharge port 2044 and the sludge inlet 203, realizing the effective separation of impurities and enabling them to leave the filter disc 2041 smoothly, avoiding impurities remaining on the filter disc 2041 and hindering the filtration of rainwater. In this embodiment, the guide vanes 2043 on two adjacent filter discs 2041 rotate in opposite directions. There are two silt guiding channels 202, which are symmetrically constructed on the periphery of the vertical water collection well 201. The silt discharge port 2044 of each water filtering and impurity guiding component 204 is connected to the corresponding silt guiding channel 202. In this way, when rainwater passes through the uppermost filter disc 2041, except for the part of rainwater that passes directly through the filter disc 2041, the rest of the rainwater flows clockwise through the spiral-shaped channel and gradually passes through the filter disc 2041. When the rainwater falls on the next filter disc 2041, the rainwater moves counterclockwise. Thus, the process of rainwater passing through each filter disc 2041, that is, except for the part of rainwater that passes directly through the filter disc 2041, the rest of the rainwater passes through clockwise and counterclockwise alternately. In this way, the rainwater is alternately slowed down, so that the impurities in it have enough time to separate from the rainwater and enter the corresponding silt guiding channel 202.

[0040] As a preferred embodiment of the present invention, such as Figure 10-12As shown, the multi-core water filtration mechanism 300 includes a water filter tank 301 and multiple vertical water filter components. These vertical water filter components are disposed within the tank cavity 302 of the water filter tank 301. A water collection chamber 309 is formed at the lower part of the water filter tank 301, which is connected to the tank cavity 302 and the inlet end of the spiral-shaped water storage mechanism 400. The upper end of each vertical water filter component is connected to the water supply pipe system 500, and the lower end of each vertical water filter component is connected to the sludge extraction pipe system 600. Rainwater enters each vertical water filter component through the water supply pipe system 500, is filtered by the vertical water filter components, enters the tank cavity 302, then enters the water collection chamber 309, and finally enters the spiral-shaped water storage mechanism 400 through the water collection chamber 309. This embodiment employs multiple vertical filtration components to simultaneously filter rainwater, improving filtration efficiency and preventing overload due to excessive water volume. During prolonged operation, some silt will accumulate at the bottom of the vertical filtration components, which can be removed by the silt extraction pipe system 600. The specific structure of the vertical filtration component in this embodiment is as follows: it includes, from the inside out, an inner filter cylinder 305, a cylindrical filter element 304, and an outer filter cylinder 303. A water inlet cover 307 is detachably connected to the upper end of the outer filter cylinder 303, and this water inlet cover 307 is connected to the water supply pipe system 500. A silt collection cover 308 is detachably connected to the lower end of the outer filter cylinder 303, and this silt collection cover 308 is connected to the silt extraction pipe system 600. Rainwater is transported to the inner filter cartridge 305 through the water supply pipe system 500, and then sequentially passes through the cylindrical filter element 304 and the outer filter cartridge 303 before entering the vessel cavity 302. The cylindrical filter element 304 filters out organic matter and small impurities from the rainwater, ensuring that the impurity content of the rainwater entering the volute-shaped water storage mechanism 400 is reduced to a predetermined range. In this embodiment, to prevent excessive impurities from clogging the inner filter cartridge 305, a guide vane 306 is constructed on the inner peripheral wall of the inner filter cartridge 305. This guide vane 306 extends spirally from the upper end of the inner filter cartridge 305 along its axis to the lower end. Due to the presence of the guide vane 306, impurities remaining on the inner peripheral wall of the inner filter cartridge 305 are gradually drawn into the sediment collection hood 308 under the impact of the swirling water flow, thus facilitating impurity collection and preventing clogging of the inner filter cartridge 305.

[0041] As a preferred embodiment of the present invention, such as Figure 13 , 15As shown, the spiral-shaped water storage mechanism 400 includes a cylindrical water storage tank 401. The bottom wall of the water storage tank 401 is recessed downwards in the middle. A water inlet connector 404 is connected to the peripheral wall of the water storage tank 401. The water inlet connector 404 is directly connected to the outlet of the multi-core water filter mechanism 300, or the water inlet connector 404 is indirectly connected to the outlet of the multi-core water filter mechanism 300 through a pressure pump. In this embodiment, a water guide grid 402 extending in a spiral shape is fixed to the water storage tank 401. The inner cavity of the water storage tank 401 is divided into spiral-shaped water guide channels 403 by the water guide grid 402. The water guide channels 403 extend to the center of the inner cavity of the water storage tank 401. A central pipe 405 is installed at the center of the water storage tank 401. The lower end of the central pipe 405 extends to the lower part of the water storage tank 401, and the upper end of the central pipe 405 extends to the ground surface to facilitate connection with water-using equipment. In this embodiment, because the bottom wall of the water storage tank 401 is concave in the middle, the water entering the water storage tank 401 gradually converges towards the middle. As the water level in the middle gradually rises, the water level in other areas will also gradually rise accordingly. In this embodiment, multiple disinfection columns 406 are installed at the upper end of the water storage tank 401. These disinfection columns 406 are spaced apart along the extension direction of the water guiding channel 403. Specifically, the disinfection column 406 includes a feeding hole pipe 4061, which extends vertically into the water guiding channel 403. Chlorine tablets are placed in the feeding hole pipe 4061 to achieve the purpose of disinfecting rainwater. A connecting joint 4062 is constructed at the upper end of the feeding hole pipe 4061. This connecting joint 4062 is detachably connected to a sealing cap 4063 via a threaded connection. An operating handwheel 4064 is installed at the upper end of the sealing cap 4063. In this embodiment, the sealing cap 4063 is opened by rotating the operating handwheel 4064, and then a certain number of chlorine tablets are added into the feeding hole pipe 4061. In this way, the chlorine tablets come into contact with the rainwater and slowly dissolve, achieving a long-term and effective disinfection effect on the rainwater. Since the disinfection column pipes 406 are spaced apart in the water guiding channel 403, the rainwater passes through each disinfection column pipe 406 one by one as it flows through the water guiding channel 403, and is thus disinfected in multiple stages, improving the thoroughness of disinfection. Moreover, in the subsequent water use process, the water-using equipment draws water from the middle of the water storage tank 401 through the central pipe 405, and the water in other areas of the water storage tank 401 gradually converges towards the middle of the water storage tank 401, thereby compensating for the loss in the middle of the water storage tank 401. During this process, the rainwater in the water storage tank 401 converges towards the center through the water guiding channel 403, and the flowing rainwater is disinfected by the disinfection column pipes 406 it passes through. During the storage of rainwater in the water storage tank 401, the chlorine tablets in each disinfection column 406 gradually dissolve, achieving the purpose of disinfecting the rainwater in the area. Moreover, in the distribution design of the disinfection column 406, the effective range of disinfection is taken into account to ensure that these disinfection column 406 can cover the entire water storage tank 401.

[0042] As a preferred embodiment of the present invention, such as Figure 2 , 3 As shown in Figures 4, 11, and 12, the water supply system 500 includes a water pump 501. A main pumping pipe 502 is connected to the inlet end of the water pump 501. The main pumping pipe 502 is connected to a first pumping branch pipe 503 and a second pumping branch pipe 504. The first pumping branch pipe 503 extends into the upper part of the sediment collection chamber 206, which contains rainwater without silt (part of the rainwater enters the sediment collection chamber 206 through the sediment guide channel 202). The second pumping branch pipe 504 extends into the upper part of the water collection chamber 207 to extract rainwater from the water collection chamber 207. A main water supply pipe 505 is connected to the outlet end of the water pump 501. The main water supply pipe 505 is connected to an annular water supply pipe 506. Multiple water supply branch pipes 507 are evenly connected along the circumference of the annular water supply pipe 506, and each water supply branch pipe 507 is connected to a corresponding inlet shroud 307. In this embodiment, a connecting pipe 508 is connected to the lower end of the water collection chamber 309. The connecting pipe 508 is directly connected to the water inlet connector 404, or the connecting pipe 508 is connected to the water inlet connector 404 through a pressure pump. In this embodiment, the rainwater in the sediment collection chamber 206 and / or the water collection chamber 207 is transported to each vertical water filter component by controlling the water pump 501. The rainwater in the water collection chamber 309 is then transported to the spiral water storage mechanism 400 by gravity flow or pressure pump, thereby realizing the water conveyance operation. The sludge removal pipe system 600 of this embodiment includes a sludge removal main pipe 601 connected to a connecting pipe 2045 on the uppermost water filter and impurity guide component 204. A sludge removal bottom pipe 602 is connected to the lower end of the connecting pipe 2045 on the lowermost water filter and impurity guide component 204. The sludge removal bottom pipe 602 extends into the lower part of the water collection chamber 207. A bypass pipe 603 is connected to the sludge removal main pipe 601. The bypass pipe 603 is connected to the first annular sludge removal pipe 605 through a connecting pipe 604. The first annular sludge removal pipe 605 is fitted outside the sludge collection tank 205. A plurality of first sludge removal branch pipes 606 are evenly connected along the circumference of the first annular sludge removal pipe 605. The lower end of each first sludge removal branch pipe 606 extends into the lower part of the sludge collection chamber 206. In this embodiment, a transfer pipe 607 is connected to the first annular sludge suction pipe 605, which is connected to the second annular sludge suction pipe 608. Multiple second sludge suction branch pipes 609 are connected to the second annular sludge suction pipe 608, and each second sludge suction branch pipe 609 is connected to the lower end of the corresponding sludge collection hood 308. This embodiment connects the main sludge suction pipe 601 to a sludge suction pump, enabling the pump to suction and discharge sludge from the bottom of the sludge collection chamber 206, the bottom of the water collection chamber 207, and the bottom of the sludge collection hood 308, thus achieving the purpose of sludge removal.

[0043] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A device for collecting, purifying and recycling urban rainwater, characterized in that it comprises: The application relates to a multi-stage impurity-removing water collecting mechanism, a multi-core water filtering mechanism and a snail-shaped water storage mechanism which are embedded under the ground surface, are communicated through a water delivery pipe system, and are communicated with a silt pumping pipe system, wherein a snail-shaped water collecting channel is arranged at the upper end of the multi-stage impurity-removing water collecting mechanism, the snail-shaped water collecting channel is communicated with the upper end of the multi-stage impurity-removing water collecting mechanism, the multi-stage impurity-removing water collecting mechanism comprises a vertical water collecting well which is excavated below the water collecting channel, a plurality of water filtering and impurity guiding members are sequentially connected in the vertical water collecting well in the vertical direction, the silt pumping pipe system is communicated with the bottom of the well through the water filtering and impurity guiding members, a silt collecting pool is arranged at the lower part of the outer periphery of the vertical water collecting well, the silt collecting pool is communicated with the silt pumping pipe system, a silt guiding channel which extends in the vertical direction is arranged on the peripheral wall of the vertical water collecting well, the silt guiding channel is communicated with the silt collecting pool and the silt discharging ports of the water filtering and impurity guiding members, the water filtering and impurity guiding member comprises a filter disc which is convex upward in the middle part, a snail-shaped water guiding piece is arranged on the upper end surface of the filter disc, a blocking edge is formed at the outer edge of the filter disc, the silt discharging port is arranged on the blocking edge and is communicated with the silt feeding port on the silt guiding channel, a connecting pipe is arranged at the center of the filter disc, the two connecting pipes in the two adjacent filter discs are sequentially connected, and the rotation directions of the water guiding pieces on the two adjacent filter discs are opposite.

2. The urban rainwater collecting, purifying and recycling device according to claim 1, characterized in that: The water collecting channel comprises a snail-shaped water channel body which is arranged on the ground surface, a water inlet channel which is communicated with the multi-stage impurity-removing water collecting mechanism is arranged at the center of the water channel body, and the inner side end of the water channel body is communicated with the water inlet channel.

3. The urban rainwater collecting, purifying and recycling device according to claim 2, characterized in that: A water permeating unit which extends along the snail-shaped form of the water channel body is arranged at the upper part of the water channel body, the water permeating unit comprises a first water filtering layer, a second water filtering layer and a third water filtering layer which are sequentially arranged from top to bottom, and the water passing gaps of the first water filtering layer, the second water filtering layer and the third water filtering layer decrease downwards in the vertical direction.

4. The urban rainwater collecting, purifying and recycling device according to claim 1, characterized in that: The multi-core water filtering mechanism comprises a plurality of vertical water filtering members which are arranged in a water filtering kettle, a water collecting chamber is formed at the lower part of the water filtering kettle, the water collecting chamber is communicated with the water inlet end of the snail-shaped water storage mechanism, the upper end of each vertical water filtering member is communicated with the water delivery pipe system, and the lower end of each vertical water filtering member is communicated with the silt pumping pipe system.

5. The urban rainwater collecting, purifying and recycling device according to claim 4, characterized in that: The vertical water filtering member comprises an inner filter cylinder, a cylindrical filter core and an outer filter cylinder which are sequentially arranged from inside to outside, a water inlet cover is detachably connected to the upper end of the outer filter cylinder, the water inlet cover is communicated with the water delivery pipe system, a silt collecting cover is detachably connected to the lower end of the outer filter cylinder, and the silt collecting cover is communicated with the silt pumping pipe system.

6. The urban rainwater collecting, purifying and recycling device according to claim 5, characterized in that: A silt guiding blade is arranged on the inner peripheral wall of the inner filter cylinder, the silt guiding blade spirally extends along the axis of the inner filter cylinder from the upper end of the inner filter cylinder to the lower end of the inner filter cylinder.

7. The urban rainwater collecting, purifying and recycling device according to claim 1, characterized in that: The snail-shaped water storage mechanism comprises a cylindrical water storage pool, the middle part of the bottom wall of the water storage pool is concave downward, a water guiding grille which extends in a snail-shaped line form is fixed to the water storage pool, the inner cavity of the water storage pool is divided into a snail-shaped water guiding channel through the water guiding grille, the water guiding channel extends to the center of the inner cavity of the water storage pool, a central pipe is arranged at the center of the water storage pool, and the lower end of the central pipe extends to the lower part of the water storage pool.

8. The urban rainwater collecting, purifying and recycling device according to claim 7, characterized in that: A plurality of disinfection columns are installed at the upper end of the water storage tank, and the plurality of disinfection columns are arranged in the water guide channel in the extension direction of the water guide channel; the disinfection column comprises a material placing hole pipe extending into the water guide channel in the vertical direction, chlorine tablets are placed in the material placing hole pipe, and a sealing cap is detachably connected to the upper end of the material placing hole pipe.

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