Integrated rainwater purification and utilization device

Abstract

This invention discloses an integrated rainwater purification and utilization device, comprising a housing, a water purification module, a water storage module, and a rainwater utilization module, all installed within the housing. The housing has an inlet and an outlet; the inlet is located on the upper part of one side of the housing, and the outlet is located in the middle of the other side. The water purification module includes a primary sedimentation tank, a secondary sedimentation tank, a filter tank, an overflow pipe, and a flow meter. The water storage module includes a water storage tank and a level sensor. The rainwater utilization module includes a submersible sediment pump, a three-way solenoid valve, and a connecting pipe. This invention improves the purification effect of the filter tank by setting up multiple filter boxes in the filter tank, thus improving the quality of the purified rainwater and enabling secondary utilization of the purified rainwater.

Description

Technical Field

[0001] This invention belongs to the field of water purification technology, and in particular relates to an integrated rainwater purification and utilization device. Background Technology

[0002] Construction and landscaping sites often damage surface vegetation or other coverings during construction, resulting in runoff from rainwater carrying large amounts of silt, garbage, and other pollutants. Direct discharge into the municipal stormwater drainage network can easily cause blockages and other problems.

[0003] Patent CN107237367A discloses a rainwater purification and reuse device and method. The device includes a first container, a second container, a rainwater collection pipe, and a filter belt. The second container is housed within the first container, dividing the first container into at least three compartments: a first compartment, a second compartment, and a third compartment. A through-hole is formed on the left side wall of the first compartment, through which the rainwater collection pipe is fixedly inserted. A first water passage hole is provided on the first side wall between the first and second compartments. The filter belt is disposed within the second compartment. A second water passage hole is provided at the bottom of the second side wall between the second and third compartments. This rainwater purification and reuse device is difficult to move and disassemble, making it inconvenient for use on construction sites.

[0004] Although some cities require construction sites to install sedimentation tanks to settle rainwater before discharge, sedimentation tanks have relatively simple functions, low single-stage sedimentation efficiency, poor purification effect, and most rainwater is directly discharged into the pipe network after sedimentation, making it difficult to reuse. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an integrated rainwater purification and utilization device. The device of this invention improves the purification effect of the filter pool on the water body by setting up multiple filter boxes in the filter pool to purify the rainwater, improves the quality of the purified rainwater, and allows for the secondary utilization of the purified rainwater.

[0006] To achieve the above-mentioned objectives, the technical solution provided by this invention patent is as follows:

[0007] An integrated rainwater purification and utilization device includes a housing, a water purification module, a water storage module, and a rainwater utilization module, all installed within the housing. The housing has an inlet and an outlet; the inlet is located on the upper part of one side of the housing, and the outlet is located in the middle of the other side. The water purification module includes a primary sedimentation tank, a secondary sedimentation tank, a filter tank, an overflow pipe, and a flow meter. The primary sedimentation tank is installed at the upper part of the housing on the outlet side, connected to the inlet. The primary sedimentation tank and the secondary sedimentation tank are connected via the overflow pipe, which houses the flow meter. The secondary sedimentation tank is installed below the primary sedimentation tank and at the bottom of one side of the housing. The filter tank is installed on one side of the secondary sedimentation tank, positioned between the water storage module and the secondary sedimentation tank. The secondary sedimentation tank is equipped with a first partition plate. The filtration tank contains multiple filter boxes, each containing filter media. A seepage pipe is located at the bottom of the filtration tank and connects to the water storage module. A second partition plate separates the water storage module from the filtration tank. The water storage module includes a water storage tank and a level sensor. The water storage tank is connected to the outlet, and the level sensor is mounted on the tank housing the water storage tank. The rainwater utilization module includes a submersible sediment pump, a three-way solenoid valve, and a connecting pipe. The submersible sediment pump is installed at the bottom of the water storage tank and connected to the secondary sedimentation tank via the connecting pipe. One end of the connecting pipe connects to the secondary sedimentation tank, and the other end has a rainwater utilization port and a sediment discharge port. A first three-way solenoid valve and a second three-way solenoid valve are installed on the connecting pipe at the bottom of the water storage tank. The first three-way solenoid valve connects to the water storage tank, and the second three-way solenoid valve connects to the rainwater utilization port and the sediment discharge port.

[0008] The aforementioned box body is generally rectangular in shape. A steel grating is installed on the box body above the primary sedimentation tank, and a first maintenance cover is installed on the box body above the secondary sedimentation tank. The first maintenance cover is generally elongated, and there are multiple first maintenance covers. The first maintenance cover is movably connected to the box body.

[0009] The aforementioned primary sedimentation tank is equipped with a bar screen, which is located on the side of the primary sedimentation tank near the inlet. The top of the primary sedimentation tank is fitted with a steel bar screen. The primary sedimentation tank is movably connected to the tank. Support columns are provided on both sides of the bottom of the primary sedimentation tank, and the support columns are fixedly connected to the tank. The primary sedimentation tank is placed on top of the support columns. Vertical plates are provided on the support columns on the outside of the primary sedimentation tank to fix the position of the primary sedimentation tank during installation.

[0010] The above-mentioned overflow pipes are multiple, one end of which is connected to the primary sedimentation tank, and the other end of which is connected to the bottom of the secondary sedimentation tank. The extension height of one end of the overflow pipe in the primary sedimentation tank is 20cm-30cm, and the distance between the other end of the overflow pipe and the bottom of the secondary sedimentation tank is not less than 20cm.

[0011] A guide plate is provided at the upper end of the aforementioned filtration tank. One end of the guide plate is connected to the upper end of the first partition plate, and the other end of the guide plate is connected to the second partition plate. The guide plate is placed at an angle, and multiple mesh holes are provided on the end face of the guide plate. Rainwater overflowing from the upper end of the first partition plate in the secondary sedimentation tank flows evenly into the filtration tank through the guide plate. The height of the first partition plate is lower than the bottom height of the primary sedimentation tank. The upper end of the second partition plate is connected to the upper end of the housing, and the lower end of the second partition plate is connected to the lower end of the housing.

[0012] The filter boxes in the above-mentioned filter pool are arranged in multiple layers. The filter media in the filter boxes are ceramic particles and coarse sand or other filter materials of different particle sizes. The filter boxes are movably connected in the filter pool.

[0013] The seepage pipe at the bottom of the filter pool is wrapped with non-woven fabric, and rainwater in the filter pool enters the water storage tank through the seepage pipe; the side of the seepage pipe is porous.

[0014] The upper end face of the tank of the above-mentioned water storage tank is provided with a second maintenance cover plate. Fixed columns are provided on both sides of the lower end face of the second maintenance cover plate on the tank. The maintenance cover plate is installed on the fixed columns. A maintenance ladder is provided on the tank below the maintenance cover plate. The height of the tank where the liquid level sensor is located is greater than the height of the outlet. The outlet is connected to the municipal rainwater pipe network. Rainwater in the water storage tank is discharged into the municipal rainwater pipe network through the outlet.

[0015] When the flow velocity of rainwater in the overflow pipe, as monitored by the flow velocity meter, is less than one-third of the normal flow velocity, the monitoring signal from the flow velocity meter is fed back to the submersible sediment pump. The submersible sediment pump is then started, the first three-way solenoid valve is closed to disconnect the connecting pipe from the reservoir, and the second three-way solenoid valve is opened to connect the submersible sediment pump to the sediment discharge outlet. The submersible sediment pump then pumps sediment from the bottom of the secondary sedimentation tank through the connecting pipe and discharges it from the sediment discharge outlet. When the rainwater in the reservoir is reused, the first three-way solenoid valve is opened to connect the connecting pipe to the reservoir, and the second three-way solenoid valve is opened to connect the submersible sediment pump to the rainwater utilization port. The submersible sediment pump then uses the rainwater in the reservoir through the connecting pipe for secondary reuse via the rainwater utilization port.

[0016] Based on the above technical solution, the integrated rainwater purification and utilization device of this invention has achieved the following technical advantages through practical application:

[0017] 1. Compared with the prior art, the integrated rainwater purification and utilization device of the present invention improves the purification effect of the filter pool on water bodies and the quality of the purified rainwater by setting up multi-layer filter boxes in the filter pool to purify rainwater, and allows for the secondary utilization of the purified rainwater.

[0018] 2. Compared with the prior art, the multiple sedimentation tanks and filter boxes designed in the integrated rainwater purification and utilization device of the present invention improve the rainwater purification effect, so that the purified rainwater is discharged into the municipal pipe network without causing blockage of the municipal pipe network. At the same time, the multiple sedimentation tanks in the integrated rainwater purification and utilization device of the present invention prolong the time for rainwater to enter the municipal rainwater pipe network, reducing the drainage pressure of the municipal rainwater pipe network.

[0019] 3. Compared with the prior art, the primary sedimentation tank in the integrated rainwater purification and utilization device of the present invention has a detachable structure, which facilitates the cleaning of the sediment deposited in the primary sedimentation tank and improves the efficiency of sediment cleaning.

[0020] 4. Compared with the prior art, the filter box in the integrated rainwater purification and utilization device of the present invention has multiple layers and is a liftable filter box. The filter box can be lifted layer by layer using machinery or auxiliary tools. Different particle sizes of filter materials are distributed in different layers of filter boxes, which improves the filtration efficiency of the filter box. At the same time, the filter box is a liftable filter box, which facilitates the installation and disassembly of the filter box.

[0021] 5. Compared with the prior art, the integrated rainwater purification and utilization device of the present invention has each filter tank arranged vertically, and water exchange is carried out through overflow pipes, overflow ports, etc. The device of the present invention has a small footprint and can be assembled in a container-sized equipment box. Each sedimentation tank and water storage tank is protected by a cover plate or grating plate, and other equipment is enclosed in the equipment box. Compared with traditional sedimentation tanks, it not only occupies a small area, but also greatly reduces the risk of injury caused by accidental falls. At the same time, the integrated rainwater purification and utilization device is easy to hoist and transport, can be reused, and reduces production costs. Attached Figure Description

[0022] Figure 1 This is a top view of the integrated rainwater purification and utilization device in the integrated rainwater purification and utilization device of the present invention.

[0023] Figure 2 This is a cross-sectional view of the integrated rainwater purification and utilization device in the present invention.

[0024] Figure 3 This is a front view of the integrated rainwater purification and utilization device in the invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the following description is provided with reference to the accompanying drawings.

[0026] The invention is described using specific examples shown. However, it should be understood that these descriptions are merely exemplary.

[0027] This description is intended not to limit the scope of the invention. Furthermore, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the invention.

[0028] like Figure 1-3An integrated rainwater purification and utilization device is described. The device includes a housing 1, a water purification module, a water storage module, and a rainwater utilization module, all installed inside the housing 1. The housing 1 has an inlet 11 and an outlet 12. The inlet 11 is located on the upper part of one side of the housing 1, and the outlet 12 is located in the middle of the other side of the housing 1. The water purification module includes a primary sedimentation tank 2, a secondary sedimentation tank 3, a filter tank 4, an overflow pipe 31, and a flow meter 32. The primary sedimentation tank 2 is installed at the upper end of the housing 1 inside the outlet 12 side. The primary sedimentation tank 2 and the... The inlet 11 is connected, and the primary sedimentation tank 2 and the secondary sedimentation tank 3 are connected through the overflow pipe 31. The overflow pipe 31 is equipped with a flow meter 32. The secondary sedimentation tank 3 is installed below the primary sedimentation tank 2 and at the bottom of one side of the housing 1. The filter tank 4 is installed on one side of the secondary sedimentation tank 3 and is located between the water storage module and the secondary sedimentation tank 3. A first partition plate 42 is provided between the filter tank 4 and the secondary sedimentation tank 3. The filter tank 4 is equipped with a multi-layer filter box 43, and filter media is placed in the filter box 43. The bottom of the filter tank 4 is equipped with a seepage channel. Pipe 44, the seepage pipe 44 is connected to the water storage module, the water storage module and the filter tank 4 are provided with a second partition plate 45; the water storage module includes a water storage tank 5 and a liquid level sensor 51, the water storage tank 5 is connected to the outlet 12, and the liquid level sensor 51 is installed on the housing 1 where the water storage tank 5 is located; the rainwater utilization module includes a submersible sediment pump 61, a three-way solenoid valve and a connecting pipe 64, the submersible sediment pump 61 is installed at the bottom of the water storage tank 5, the submersible sediment pump 61 is connected to the secondary sedimentation tank 3 through the connecting pipe 64, one end of the connecting pipe 64 is connected to the secondary sedimentation tank 3, and the other end of the connecting pipe 64 is provided with a second partition plate 45; The device includes a rainwater inlet 65 and a sediment discharge outlet 66. A first three-way solenoid valve 62 and a second three-way solenoid valve 63 are installed on the connecting pipe 64 at the bottom of the water storage tank 5. The first three-way solenoid valve 62 is connected to the water storage tank 5, and the second three-way solenoid valve 63 is connected to the rainwater inlet 65 and the sediment discharge outlet 66. Multiple sedimentation tanks and a filter box 43 improve the rainwater purification effect, preventing blockage of the municipal pipe network when the purified rainwater is discharged into it. Furthermore, the multiple sedimentation tanks in the integrated rainwater purification and utilization device of this invention extend the time for rainwater to enter the municipal rainwater pipe network, reducing the drainage pressure on the municipal rainwater pipe network.

[0029] The aforementioned box 1 is generally rectangular in shape. A steel grating 22 is installed on the box 1 above the primary sedimentation tank 2. A first maintenance cover 46 is installed on the box 1 above the secondary sedimentation tank 3. The first maintenance cover 46 is generally elongated and there are multiple first maintenance covers 46. The first maintenance cover 46 is movably connected to the box 1. The first maintenance cover 46 facilitates opening the box 1 and installing and disassembling the multi-layer filter box 43.

[0030] The primary sedimentation tank 2 is equipped with a bar screen 21, which is located on the side of the primary sedimentation tank 2 closest to the inlet 11. A steel bar screen 22 is installed on the top of the tank 1 of the primary sedimentation tank 2. The primary sedimentation tank 2 and the tank 1 are movably connected. Support columns 23 are installed on both sides of the bottom of the primary sedimentation tank 2, and the support columns 23 are fixedly connected to the tank 1. The primary sedimentation tank 2 is placed on top of the support columns 23. Vertical plates are installed on the support columns 23 on the outside of the primary sedimentation tank 2 to fix the position of the primary sedimentation tank 2 during installation. The primary sedimentation tank 2 has a detachable structure, facilitating the cleaning of sediment deposited in the primary sedimentation tank 2 and improving the efficiency of sediment cleaning. The bar screen 21 inside the primary sedimentation tank 2 helps to prevent debris in rainwater from entering the secondary sedimentation tank 3, thus purifying the rainwater and preventing blockage of the overflow pipe 31. The steel bar screen 22 on the top of the tank 1 of the primary sedimentation tank 2 avoids the risk of injury from accidental falls.

[0031] There are multiple overflow pipes 31. One end of the overflow pipe 31 is connected to the primary sedimentation tank 2, and the other end of the overflow pipe 31 is connected to the bottom of the secondary sedimentation tank 3. The extension height of one end of the overflow pipe 31 in the primary sedimentation tank 2 is 20cm-30cm, and the distance between the other end of the overflow pipe 31 and the bottom of the secondary sedimentation tank 3 is not less than 20cm.

[0032] A guide plate 41 is provided at the upper end of the filter tank 4. One end of the guide plate 41 is connected to the upper end of the first partition plate 42, and the other end of the guide plate 41 is connected to the second partition plate 45. The guide plate 41 is placed at an angle, and multiple mesh holes are provided on the end face of the guide plate 41. Rainwater overflowing from the secondary sedimentation tank 3 through the upper end of the first partition plate 42 flows evenly into the filter tank 4 through the guide plate 41. The height of the first partition plate 42 is lower than the bottom height of the primary sedimentation tank 2. The upper end of the second partition plate 45 is connected to the upper end of the box 1, and the lower end of the second partition plate 45 is connected to the lower end of the box 1. The guide plate 41 above the secondary sedimentation tank 3 allows rainwater in the secondary sedimentation tank 3 to flow evenly into the filter tank 4, improving the water purification efficiency of the filter box 43.

[0033] The filter boxes 43 within the aforementioned filter pool 4 are configured with multiple layers. The filter media within each filter box 43 are ceramic particles and coarse sand or other filter materials of different particle sizes. The filter boxes 43 are movably connected within the filter pool 4. This invention improves the water purification effect of the filter pool 4 by purifying rainwater through multiple layers of filter boxes 43 within the filter pool 4, thereby improving the quality of the purified rainwater and enabling secondary utilization of the purified rainwater. The filter boxes 43 are multi-layered and are liftable, allowing them to be lifted layer by layer using machinery or auxiliary tools. The distribution of filter media of different particle sizes across different layers of filter boxes 43 improves the filtration efficiency of the filter boxes 43. Furthermore, the liftable design of the filter boxes 43 facilitates their installation and disassembly.

[0034] The seepage pipe 44 at the bottom of the filter pool 4 is wrapped with non-woven fabric. Rainwater in the filter pool 4 enters the water storage tank 5 through the seepage pipe 44. The seepage pipe 44 has multiple holes on its side. Wrapping the seepage pipe 44 with non-woven fabric prevents the silt in the filter pool from entering the water storage tank 5 through the seepage pipe 44, thereby improving the rainwater purification effect of the filter pool 4.

[0035] A second maintenance cover 52 is provided on the end face of the box 1 at the upper end of the above-mentioned water storage tank 5. Fixing columns 53 are provided on both sides of the box 1 at the lower end face of the second maintenance cover 52. The maintenance cover is installed on the fixing columns 53. A maintenance ladder 54 is provided on the box 1 below the maintenance cover. The height of the box 1 where the liquid level sensor 51 is located is greater than the height of the outlet 12. The outlet 12 is connected to the municipal rainwater pipe network. Rainwater in the water storage tank 5 is discharged into the municipal rainwater pipe network through the outlet 12. The installation of the maintenance ladder 54 and the second maintenance cover 52 facilitates the alarm of the liquid level sensor 51 in the water storage tank 5 when the outlet 12 of the water storage tank 5 or the municipal rainwater pipe is blocked, resulting in poor drainage, which facilitates the maintenance of the water storage tank 5. It also facilitates personnel access to and from the water storage tank 5.

[0036] When the flow velocity of rainwater in the overflow pipe 31, as monitored by the flow velocity meter, is lower than one-third of the normal flow velocity, the monitoring signal from the flow velocity meter is fed back to the submersible sediment pump 61, which starts the submersible sediment pump 61, closes the first three-way solenoid valve 62 to disconnect the connecting pipe 64 from the water storage tank 5, and opens the second three-way solenoid valve 63 to connect the submersible sediment pump 61 to the sediment discharge outlet 66. The submersible sediment pump 61 then pumps sediment from the bottom of the secondary sedimentation tank 3 through the connecting pipe 64 and discharges it from the sediment discharge outlet 66. When the rainwater in the water storage tank 5 is reused, the first three-way solenoid valve 62 is opened to connect the connecting pipe 64 to the water storage tank 5, and the second three-way solenoid valve is opened. 63. Connect the submersible sediment pump 61 to the rainwater utilization port 65. The submersible sediment pump 61 uses the connecting pipe 64 to reuse the rainwater in the water storage tank 5 through the rainwater utilization port 65. Each filter tank 4 is arranged vertically and exchanges water through overflow pipes, overflow ports, etc. The device of the present invention has a small footprint and can be integrated into a container-sized equipment box 1. Each sedimentation tank and water storage tank 5 is protected by a cover plate or grating plate. Other equipment is enclosed in the equipment box 1. Compared with traditional sedimentation tanks, it not only has a small footprint, but also greatly reduces the risk of injury caused by accidental falls. At the same time, the integrated rainwater purification and utilization device is easy to hoist and transport, can be reused, and reduces production costs.

[0037] The working principle of the integrated rainwater purification and utilization device of the present invention is as follows: A foundation pit is excavated at the construction site, and the integrated rainwater purification and utilization device is buried in the pit. Rainwater from the construction site enters the housing 1 through the inlet 11 for water purification. The outlet 12 of the integrated rainwater purification and utilization device is connected to the municipal rainwater pipe network, and the purified rainwater is discharged into the municipal rainwater pipe network. Rainwater from the construction site enters the primary sedimentation tank 2 through the inlet 11. Rainwater with a high sediment content first passes through the screen 21 to filter out larger and floating pollutants. Then, after sedimentation in the primary and secondary sedimentation tanks 3, the relatively clean rainwater enters the filter tank 4 for further filtration. Finally, the purified rainwater enters the storage tank 5. When a large amount of sediment has settled at the bottom of the secondary sedimentation tank 3, the flow rate in the overflow pipe 31 slows down. The flow rate in the overflow pipe 31 is measured... The instrument detects a signal that the flow rate of the overflow pipe 31 is too slow and feeds back to the submersible sediment pump 61. At this time, the submersible sediment pump 61 can be started automatically or manually, and the sediment discharge outlet 66 is opened through the three-way solenoid valve. At the same time, the connecting pipe 64 is connected to the secondary sedimentation tank 3, and the sediment at the bottom of the secondary sedimentation tank 3 is pumped out by the submersible sediment pump 61, so that the flow rate of the overflow pipe 31 is restored to the normal flow rate. When rainwater reuse is required, the connecting pipe 64 is connected to the water storage tank 5 through the three-way solenoid valve, and the rainwater utilization port 65 is opened. The purified rainwater in the water storage tank 5 is pumped out and reused by the submersible sediment pump 61. When the outlet 12 of the water storage tank 5 or the municipal rainwater pipe is blocked, causing the water level of the water storage tank 5 to exceed the height of the liquid level sensor 51 in the water storage tank 5, the liquid level sensor 51 alarms, and the construction personnel enter the water storage tank 5 through the maintenance ladder 54 for maintenance.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, the scope of the invention is not limited to this.

[0039] Those skilled in the art should understand that modifications can still be made to the specific implementation of the invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solution claimed in the present invention.

Claims

1. An integrated rainwater purification and utilization device, characterized by comprising: The device includes a housing (1), a water purification module, a water storage module, and a rainwater utilization module, which are installed inside the housing (1). The housing (1) is provided with an inlet (11) and an outlet (12). The inlet (11) is located on the upper part of one side of the housing (1), and the outlet (12) is located in the middle of the other side of the housing (1). The water purification module includes a primary sedimentation tank (2), a secondary sedimentation tank (3), a filter tank (4), an overflow pipe (31), and a flow meter (32). The primary sedimentation tank (2) is installed inside the housing (1) on the side of the outlet (12). At the end, the primary sedimentation tank (2) is connected to the inlet (11), the primary sedimentation tank (2) and the secondary sedimentation tank (3) are connected through the overflow pipe (31), the overflow pipe (31) is equipped with the flow meter (32), the secondary sedimentation tank (3) is installed below the primary sedimentation tank (2), the secondary sedimentation tank (3) is installed at the bottom of one side of the box (1), the filter tank (4) is installed on one side of the secondary sedimentation tank (3), the filter tank (4) is set between the water storage module and the secondary sedimentation tank (3), and the filter tank (4) and the secondary sedimentation tank (3) are provided with a first partition plate (42). The filter tank (4) is equipped with a multi-layer filter box (43), in which filter media are placed. A seepage pipe (44) is provided at the bottom of the filter tank (4), and the seepage pipe (44) is connected to the water storage module. The water storage module and the filter tank (4) are provided with a second partition plate (45). The water storage module includes a water storage tank (5) and a liquid level sensor (51). The water storage tank (5) is connected to the outlet (12), and the liquid level sensor (51) is installed on the box (1) where the water storage tank (5) is located. The rainwater utilization module includes a submersible silt pump (61), a three-way solenoid valve and a connecting pipe (64). (61) Install the bottom of the water storage tank (5), the submersible sludge pump (61) is connected to the secondary sedimentation tank (3) through the connecting pipe (64), one end of the connecting pipe (64) is connected to the secondary sedimentation tank (3), and the other end of the connecting pipe (64) is provided with a rainwater utilization port (65) and a sludge discharge port (66). The connecting pipe (64) at the bottom of the water storage tank (5) is provided with a first three-way solenoid valve (62) and a second three-way solenoid valve (63). The first three-way solenoid valve (62) is connected to the water storage tank (5), and the second three-way solenoid valve (63) is connected to the rainwater utilization port (65) and the sludge discharge port (66). The filter tank (4) is provided with a guide plate (41) at the upper end. One end of the guide plate (41) is connected to the upper end of the first partition plate (42), and the other end of the guide plate (41) is connected to the second partition plate (45). The guide plate (41) is placed at an angle, and the end face of the guide plate (41) is provided with multiple mesh holes. The rainwater overflowing from the secondary sedimentation tank (3) through the upper end of the first partition plate (42) flows evenly into the filter tank (4) through the guide plate (41). The height of the first partition plate (42) is lower than the bottom height of the primary sedimentation tank (2). The upper end of the second partition plate (45) is connected to the upper end of the box body (1), and the lower end of the second partition plate (45) is connected to the lower end of the box body (1). The filter box (43) in the filter pool (4) is provided with multiple layers, and filter media of different particle sizes are distributed in the filter boxes of different layers. The filter box (43) is movably connected in the filter pool (4). When the flow velocity of rainwater in the overflow pipe (31) monitored by the flow velocity meter is lower than one-third of the normal flow velocity, the monitoring signal of the flow velocity meter is fed back to the submersible sediment pump (61), the submersible sediment pump (61) is started, the first three-way solenoid valve (62) is closed, so that the connecting pipe (64) is not connected to the water storage tank (5), and the second three-way solenoid valve (63) is opened, so that the submersible sediment pump (61) is connected to the sediment discharge outlet (66), and the submersible sediment pump (61) flows through the connecting pipe (64). The sediment at the bottom of the secondary sedimentation tank (3) is pumped out and discharged from the sediment discharge outlet (66); when the rainwater in the reservoir (5) is reused, the first three-way solenoid valve (62) is opened to connect the connecting pipe (64) to the reservoir (5), and the second three-way solenoid valve (63) is opened to connect the submersible sediment pump (61) to the rainwater utilization port (65). The submersible sediment pump (61) uses the connecting pipe (64) to reuse the rainwater in the reservoir (5) through the rainwater utilization port (65).

2. The integrated rainwater purification and utilization device according to claim 1, characterized in that, The box (1) is rectangular in shape. A steel grating (22) is installed on the box (1) above the primary sedimentation tank (2). A first maintenance cover (46) is installed on the box (1) above the secondary sedimentation tank (3). The first maintenance cover (46) is long and narrow. There are multiple first maintenance covers (46). The first maintenance cover (46) is movably connected to the box (1).

3. The integrated rainwater purification and utilization device according to claim 1, characterized in that, The primary sedimentation tank (2) is equipped with a grid (21), which is located in the primary sedimentation tank (2) near the inlet (11). The box (1) at the top of the primary sedimentation tank (2) is equipped with a steel grid (22). The primary sedimentation tank (2) and the box (1) are movably connected. Support columns (23) are provided on both sides of the bottom of the primary sedimentation tank (2). The support columns (23) are fixedly connected to the box (1). The primary sedimentation tank (2) is placed above the support columns (23). A vertical plate is provided on the support columns (23) on the outside of the primary sedimentation tank (2) to fix the position of the primary sedimentation tank (2) during installation.

4. The integrated rainwater purification and utilization device according to claim 1, characterized in that, There are multiple overflow pipes (31). One end of the overflow pipe (31) is connected to the primary sedimentation tank (2), and the other end of the overflow pipe (31) is connected to the bottom of the secondary sedimentation tank (3). The extension height of one end of the overflow pipe (31) in the primary sedimentation tank (2) is 20cm-30cm, and the distance between the other end of the overflow pipe (31) and the bottom of the secondary sedimentation tank (3) is not less than 20cm.

5. The integrated rainwater purification and utilization device according to claim 1, characterized in that, The bottom of the filter pool (4) is covered with a non-woven fabric for the seepage pipe (44). Rainwater in the filter pool (4) enters the water storage pool (5) through the seepage pipe (44). The side of the seepage pipe (44) is porous.

6. The integrated rainwater purification and utilization device according to claim 1, characterized in that, A second maintenance cover plate (52) is provided on the end face of the box (1) at the upper end of the water storage tank (5). Fixed columns (53) are provided on both sides of the box (1) at the lower end face of the second maintenance cover plate (52). The maintenance cover plate is installed on the fixed columns (53). A maintenance ladder (54) is provided on the box (1) below the maintenance cover plate. The height of the box (1) where the liquid level sensor (51) is located is greater than the height of the outlet (12). The outlet (12) is connected to the municipal rainwater pipe network. The rainwater in the water storage tank (5) is discharged into the municipal rainwater pipe network through the outlet (12).

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