Rainwater collection and utilization device for urban drainage system

Abstract

The invention relates to the technical field of urban drainage, and discloses a rainwater collection and utilization device for an urban drainage system, the rainwater collection and utilization device comprises a planting soil layer and a water collecting well formed in the planting soil layer in a pouring mode, and the top of the planting soil layer is sunken to form a water collecting pit; the top of the water collecting well extends into the water collecting pit, a well lid capable of being opened and closed is installed on the top of the water collecting well, a drainage hole is formed in the well lid, and two first filtering frames and two second filtering frames are further included. The first filtering frame and the second filtering frame are arranged and surround the top of the water collecting well, multi-stage filtering of rainwater can be achieved, the filtering effect of the rainwater is improved, silt and other tiny impurities discharged into the water collecting well are reduced, the cleaning frequency of the water collecting well can be reduced, effective rainwater collection is facilitated, and the rainwater collecting effect is improved. And subsequent treatment procedures of the rainwater can be reduced, the rainwater recycling efficiency is improved, then the device is convenient to use, and recycling of the rainwater is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of urban drainage, in particular to a rainwater collection and utilization device for an urban drainage system. Background Art

[0002] With the acceleration of urbanization, water consumption for landscape use, road washing, greening, and car washing has increased rapidly, making already scarce water resources even more scarce. Furthermore, as urbanization progresses, more ground is covered by buildings and roads, preventing rainwater from seeping into the ground and increasing the pressure on urban drainage systems. Therefore, rainwater collection and reuse are commonly used to address this issue. This not only alleviates water resource constraints, but also reduces the pressure on urban drainage systems by storing rainwater through rainwater collection modules, reducing the incidence of urban waterlogging.

[0003] Existing rainwater collection and utilization devices generally build collection wells under the soil layer of urban green spaces, and the rainwater collected in the collection wells is pumped out through pumping pipes and centrally treated so that the treated rainwater can be recycled. However, when the rainwater flows into the collection wells through the overflow holes at the top of the collection wells, it can only intercept larger debris such as leaves, but it is difficult to intercept fine impurities such as mud and sand carried in the rainwater, which can easily cause mud and sand to flow into the collection wells, not only easily causing blockage of the pumping pipes and affecting the recovery of rainwater, but also causing scaling inside the collection wells, resulting in a reduction in the water storage volume, affecting the rainwater collection effect. The inside of the collection wells needs to be cleaned frequently, which affects the use of the rainwater collection and utilization device and is not conducive to the collection and recycling of rainwater. Summary of the Invention

[0004] The present invention proposes a rainwater collection and utilization device for urban drainage systems to solve the existing problem that it is difficult to intercept fine impurities such as mud and sand carried in rainwater, which easily causes fine impurities such as mud and sand to flow into the collection well.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a rainwater collection and utilization device for an urban drainage system, comprising a planting soil layer and a water collection well cast and formed in the planting soil layer, wherein the top of the planting soil layer is recessed to form a water collection pit, the top of the water collection well extends into the water collection pit and is equipped with an openable and closable manhole cover, and the manhole cover is provided with drainage holes, and further comprising two first filter racks and two second filter racks, the top of the water collection well is provided with evenly distributed overflow holes around it, and a water pump is connected to one side of the water collection well;

[0006] The two first filter racks and the two second filter racks are arranged at intervals and enclosed around the top of the water collection pit, so as to block the overflow holes around the top of the water collection pit. The two first filter racks and the two second filter racks are both provided with filter nets and second filter plates from the outside to the inside, and the second filter plates are provided with a second water-permeable non-woven fabric layer inside. When the rainwater collected in the water collection pit flows into the water collection pit through the overflow holes, the rainwater is filtered by the two first filter racks and the two second filter racks.

[0007] Preferably, connecting corner blocks are installed at the four corners of the top of the water collection well, splicing blocks are installed on both sides of the two first filter racks and the two second filter racks, and splicing grooves for plugging the splicing blocks are opened on both sides of the connecting corner blocks.

[0008] Preferably, a filter frame is provided above the interior of the water collection well, and a support frame for supporting the filter frame is also installed on the inner wall of the water collection well. A first filter plate is provided inside the filter frame, and evenly distributed filter holes are provided at the bottom of the filter frame. A first water-permeable non-woven fabric layer is provided inside the first filter plate.

[0009] Preferably, plug-in blocks are installed on all four sides of the outer wall of the filter frame, and a handle is also installed on the inner wall of the filter frame. The inner wall of the water collection well is provided with a plug-in slot for inserting the plug-in block.

[0010] Preferably, a flow guide frame is further installed on the top of the filter frame, and a flow guide slope is formed on the top of the flow guide frame, which is inclined downward toward the inside of the filter frame.

[0011] Preferably, sealing blocks that can be inserted into the plug-in grooves are installed on all four sides of the outer wall of the guide frame.

[0012] Preferably, the top of the sealing block is beveled to form a flow guide portion facing the interior of the filter frame.

[0013] Preferably, the inner bottom of the filter frame is also provided with evenly distributed pads, and the pads are spaced apart from the filter holes. The first filter plate is laid on top of the pads, so that a drainage gap is formed between the bottom of the first filter plate and the inner bottom of the filter frame.

[0014] Preferably, limiting strips are installed on both sides of one end of the splicing block, and limiting slots for inserting the limiting strips are provided on both sides of the inner wall of the splicing groove.

[0015] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0016] (1) By setting a first filter frame and a second filter frame, and the first filter frame and the second filter frame are enclosed at the top of the water collection well, the overflow hole can be blocked when collecting water, and then the rainwater is filtered for the first time by using a filter net to remove debris such as leaves carried in the rainwater, and then the rainwater is filtered again through a second permeable non-woven fabric layer to filter out fine sediment carried in the rainwater. After filtering, the rainwater flows into the water collection well through the overflow hole, thereby realizing multi-stage filtration of rainwater, thereby improving the filtering effect of rainwater and reducing the discharge of fine impurities such as sediment into the water collection well. It can not only reduce the number of cleaning times of the water collection well and facilitate the effective collection of rainwater, but also reduce the subsequent treatment process of rainwater, improve the efficiency of rainwater recycling and treatment, and thus facilitate the use of the device, which is conducive to the recycling and utilization of rainwater;

[0017] (2) By providing connecting corner blocks, splicing blocks, and splicing grooves, the first filter frame and the second filter frame can be quickly disassembled and assembled, which facilitates the cleaning or replacement of the first filter frame and the second filter frame, improves the cleaning or replacement efficiency of the first filter frame and the second filter frame, ensures the filtering effect of the first filter frame and the second filter frame, realizes effective filtration of rainwater, and is beneficial to the collection and utilization of rainwater;

[0018] (3) By setting a support frame and a filter frame, and setting a first filter plate and filter holes in the filter frame, when the rainwater flows into the water collection well, it will first fall into the filter frame. At this time, the first filter plate filters the rainwater through the first water-permeable non-woven fabric layer inside it, and after filtering, the rainwater is filtered again through the filter holes and then discharged into the water collection well for storage, thereby realizing multi-stage filtration of rainwater, thereby greatly increasing the filtration effect of rainwater, and facilitating the collection and subsequent use of rainwater;

[0019] (4) By providing the plug-in block and the plug-in wipe, the filter frame can be quickly disassembled and assembled, thereby facilitating regular cleaning of the filter frame and facilitating maintenance and replacement when the filter frame is damaged, thereby facilitating the normal use of the filter frame, achieving effective filtration of rainwater, and facilitating the collection and utilization of rainwater. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 for Figure 1 A partial cross-sectional view of

[0023] Figure 3 This is a schematic structural diagram of the first filter frame, the second filter frame, and the water collection well when the manhole cover of the present invention is opened;

[0024] Figure 4 It is a structural schematic diagram of the water collection well of the present invention;

[0025] Figure 5 for Figure 4 A partial cross-sectional view of

[0026] Figure 6 This is a schematic structural diagram of the first filter frame and the second filter frame when they are separated;

[0027] Figure 7 is a cross-sectional view of the first filter frame of the present invention;

[0028] Figure 8 This is a schematic structural diagram of the filter frame of the present invention;

[0029] Figure 9 This is a schematic structural diagram of the filter frame after the first filter plate of the present invention is removed;

[0030] In the figure: 1. Planting soil layer; 2. Collection pit; 3. Manhole cover; 4. Connecting corner block; 5. First filter rack; 6. Second filter rack; 7. Suction pipe; 8. Collection well; 9. Overflow hole; 10. Filter frame; 11. First filter plate; 12. Plug-in slot; 13. Support frame; 14. Splicing block; 15. Splicing slot; 16. Filter net; 17. Second filter plate; 18. Guide frame; 19. Plug-in block; 20. Sealing block; 21. Spacer block; 22. Filter hole. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0032] Example 1

[0033] See also Figure 1-Figure 7As shown, a rainwater collection and utilization device for an urban drainage system includes a planting soil layer 1 and a water collection well 8 cast in the planting soil layer 1. The top of the planting soil layer 1 is recessed to form a water collection pit 2. The top of the water collection well 8 extends into the water collection pit 2 and is equipped with an openable and closable manhole cover 3. The manhole cover 3 is provided with drainage holes. It also includes two first filter racks 5 and two second filter racks 6. The top of the water collection well 8 is provided with evenly distributed overflow holes 9 all around, and one side of the water collection well 8 is connected to a pumping pipe 7. Specifically, the upper surface of the water collection pit 2 is also provided with a gravel water retention layer. The planting soil layer 1 is laid in a pit in an urban green space. The bottom of the pit is the original soil layer of the urban green space. The pumping pipe 7 is connected to an external pumping pipeline so that the rainwater collected in the water collection well 8 can be pumped out for centralized treatment through an external pumping pump to achieve rainwater recycling.

[0034] The two first filter racks 5 and the two second filter racks 6 are arranged at intervals and surrounded around the top of the water collection pit 8, so as to block the overflow holes 9 around the top of the water collection pit 8, and the interiors of the two first filter racks 5 and the two second filter racks 6 are provided with filter nets 16 and second filter plates 17 from the outside to the inside, and the interiors of the second filter plates 17 are provided with a second water-permeable non-woven fabric layer, and when the rainwater collected in the water collection pit 2 flows into the water collection pit 8 through the overflow hole 9, the rainwater is filtered by the two first filter racks 5 and the two second filter racks 6.

[0035] Through the above, on rainy days, rainwater falls on the planting soil layer 1, and then part of the rainwater will flow into the sump 2 and collect. Then, as the liquid level rises, the rainwater can flow into the sump 8 through the overflow hole 9 or the drainage hole on the manhole cover 3 for storage. At this time, the overflow hole 9 and the drainage hole filter the rainwater to prevent debris such as leaves from flowing into the sump 8, thereby realizing the collection and utilization of rainwater;

[0036] When rainwater flows into the water collection well 8 through the overflow hole 9, the two first filter racks 5 and the two second filter racks 6 surrounded on the top of the water collection well 8 block the overflow hole 9, and then the rainwater flows through the filter mesh 16 and the second filter plate 17 inside the two first filter racks 5 and the two second filter racks 6 in turn. At this time, the filter mesh 16 filters the rainwater for the first time to remove debris such as leaves carried in the rainwater. Then the second filter plate 17 filters the rainwater again through the second permeable non-woven fabric layer inside it to filter out the fine mud and sand carried in the rainwater. After filtration, the rainwater flows into the water collection well 8 through the overflow hole 9, thereby realizing multi-stage filtration of rainwater, thereby improving the filtration effect of rainwater and reducing the discharge of fine impurities such as mud and sand into the water collection well 8. It can not only reduce the number of cleaning times of the water collection well 8 and facilitate the effective collection of rainwater, but also reduce the subsequent processing steps of rainwater, improve the efficiency of rainwater recycling and treatment, thereby facilitating the use of the device and being conducive to the recycling and utilization of rainwater.

[0037] Example 2

[0038] See also Figure 1-Figure 3 as well as Figure 6 and Figure 7 As shown, connecting corner blocks 4 are installed at the four corners of the top of the water collection well 8, splicing blocks 14 are installed on both sides of the two first filter racks 5 and the two second filter racks 6, and splicing grooves 15 for plugging the splicing blocks 14 are opened on both sides of the connecting corner blocks 4.

[0039] When the first filter frame 5 or the second filter frame 6 needs to be cleaned or replaced, the first filter frame 5 or the second filter frame 6 can be pulled upward to remove the splicing block 14 from the splicing groove 15, so that the first filter frame 5 or the second filter frame 6 can be disassembled from between the two opposite connecting corner blocks 4, and then the filter screen 16 and the second filter plate 17 in the first filter frame 5 or the second filter frame 6 can be cleaned or replaced. After cleaning or replacing, the first filter frame 5 or the second filter frame 6 can be inserted between the two opposite connecting corner blocks 4 through the cooperation of the splicing block 14 and the splicing groove 15 to complete the installation of the first filter frame 5 or the second filter frame 6, thereby realizing quick disassembly and assembly of the first filter frame 5 and the second filter frame 6, facilitating the cleaning or replacement of the first filter frame 5 and the second filter frame 6, improving the cleaning or replacement efficiency of the first filter frame 5 and the second filter frame 6, ensuring the filtering effect of the first filter frame 5 and the second filter frame 6, realizing effective filtration of rainwater, and thus facilitating the collection and utilization of rainwater.

[0040] Furthermore, in this embodiment, Figure 6 and Figure 7 As shown, limit bars are installed on both sides of one end of the splicing block 14, and limit grooves for the limit bars to be inserted are opened on both sides of the inner wall of the splicing groove 15.

[0041] When the splicing block 14 is inserted into the splicing groove 15, the limiting strip will be inserted into the limiting groove to limit the splicing block 14 and the splicing groove 15, so that the splicing block 14 and the splicing groove 15 are stably plugged in, facilitating the stable installation of the first filter frame 5 and the second filter frame 6.

[0042] Example 3

[0043] See also Figure 3-Figure 5 as well as Figure 8 and Figure 9 As shown, a filter frame 10 is arranged above the interior of the water collection well 8, and a support frame 13 for supporting the filter frame 10 is also installed on the inner wall of the water collection well 8. A first filter plate 11 is arranged inside the filter frame 10, and evenly distributed filter holes 22 are opened at the bottom of the filter frame 10. A first water-permeable non-woven fabric layer is arranged inside the first filter plate 11.

[0044] When rainwater flows into the water collection well 8 through the overflow hole 9 or the drainage hole on the manhole cover 3, the rainwater will first fall into the filter frame 10, and then the first filter plate 11 will filter the rainwater through the first permeable non-woven fabric layer inside it. After filtration, the rainwater will be filtered again through the filter hole 22, and then discharged into the water collection well 8 for storage, thereby realizing multi-stage filtration of rainwater, thereby greatly increasing the filtration effect of rainwater, and facilitating the collection and subsequent use of rainwater.

[0045] At the same time, in this embodiment, Figure 9 As shown, the inner bottom of the filter frame 10 is also provided with evenly distributed pads 21, and the pads 21 are spaced apart from the filter holes 22. The first filter plate 11 is laid on top of the pads 21, so that a drainage gap is formed between the bottom of the first filter plate 11 and the inner bottom of the filter frame 10.

[0046] When rainwater flows into the filter frame 10 for filtration, the first filter plate 11 is padded by the pad 21, so that the rainwater can be temporarily stored in the drainage gap after being filtered by the first permeable non-woven fabric layer in the first filter plate 11, and then can be quickly filtered through the filter holes 22 and discharged into the water collection well 8, thereby preventing the first permeable non-woven fabric on the first filter plate 11 from fitting with the filter holes 22, causing the filter holes 22 to be easily blocked, thereby facilitating rapid filtration of rainwater.

[0047] Furthermore, in this embodiment, Figure 3 、 Figure 8 and Figure 9 As shown, a flow guide frame 18 is further installed on the top of the filter frame 10 , and a flow guide slope is formed on the top of the flow guide frame 18 , which is inclined downward toward the inside of the filter frame 10 .

[0048] When rainwater flows into the water collection well 8 through the overflow hole 9, part of the rainwater flows along the inner wall of the water collection well 8. At this time, the guide frame 18 guides the rainwater into the filter frame 10 through the guide slope on its top to facilitate the collection and filtration of rainwater, thereby further realizing efficient filtration of rainwater.

[0049] Example 4

[0050] See also Figure 3-Figure 5 as well as Figure 8 and Figure 9 As shown, plug-in blocks 19 are installed around the outer wall of the filter frame 10, and a handle is also installed on the inner wall of the filter frame 10. The inner wall of the water collection well 8 is provided with a plug-in slot 12 for inserting the plug-in block 19.

[0051] When the filter frame 10 needs to be cleaned or replaced, the manhole cover 3 can be opened first, and then the filter frame 10 can be pulled upward by the handle to move the plug-in block 19 from the plug-in slot 12 until the filter frame 10 is taken out of the water collection well 8. The filter frame 10 can then be cleaned or replaced. After cleaning or replacement, the filter frame 10 can be installed into the water collection well 8 again by cooperating with the plug-in block 19 and the plug-in slot 12, so as to achieve rapid disassembly and assembly of the filter frame 10, thereby facilitating regular cleaning of the filter frame 10 and facilitating maintenance and replacement when the filter frame 10 is damaged, which is beneficial to the normal use of the filter frame 10, achieving effective filtration of rainwater, and facilitating the collection and utilization of rainwater.

[0052] At the same time, in this embodiment, Figure 3 、 Figure 8 and Figure 9 As shown, sealing blocks 20 that can be inserted into the insertion grooves 12 are installed around the outer wall of the guide frame 18;

[0053] Furthermore, the top of the sealing block 20 is beveled to form a flow guide portion facing the interior of the filter frame 10 .

[0054] When the guide frame 18 is installed into the water collection well 8 along with the filter frame 10, the sealing block 20 is inserted into the plug-in slot 12 to seal the top of the plug-in block 19 to prevent rainwater from overflowing through the gap between the plug-in block 19 and the plug-in slot 12, thereby ensuring effective filtration of rainwater. The guide portion on the top of the sealing block 20 can divert rainwater so that the rainwater flowing into the plug-in slot 12 quickly flows into the interior of the filter frame 10, thereby facilitating the rapid inflow and filtration of rainwater.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rainwater collection and utilization device for an urban drainage system, comprising a planting soil layer (1), and a water collection well (8) cast in the planting soil layer (1), wherein the top of the planting soil layer (1) is recessed to form a water collection pit (2), the top of the water collection well (8) extends into the water collection pit (2), and is provided with an openable well cover (3), and a drainage hole is provided on the well cover (3), characterized in that: It also includes two first filter racks (5) and two second filter racks (6), the top of the water collection well (8) is provided with evenly distributed overflow holes (9) around it, and one side of the water collection well (8) is connected to a water pumping pipe (7); Two first filter racks (5) and two second filter racks (6) are arranged at intervals and enclosed around the top of the water collection pit (8) to shield the overflow holes (9) around the top of the water collection pit (8). The two first filter racks (5) and the two second filter racks (6) are both provided with filter nets (16) and second filter plates (17) from the outside to the inside. The second filter plates (17) are provided with a second water-permeable non-woven fabric layer. When the rainwater collected in the water collection pit (2) flows into the water collection pit (8) through the overflow holes (9), the rainwater is filtered by the two first filter racks (5) and the two second filter racks (6).

2. The rainwater collection and utilization device for urban drainage system according to claim 1, characterized in that: Connecting corner blocks (4) are installed at the four corners of the top of the water collection well (8), and splicing blocks (14) are installed on both sides of the two first filter racks (5) and the two second filter racks (6). Splicing grooves (15) for plugging the splicing blocks (14) are opened on both sides of the connecting corner blocks (4).

3. The rainwater collection and utilization device for urban drainage system according to claim 1, characterized in that: A filter frame (10) is provided above the interior of the water collection well (8), and a support frame (13) for supporting the filter frame (10) is also installed on the inner wall of the water collection well (8). A first filter plate (11) is provided inside the filter frame (10), and filter holes (22) are evenly distributed at the bottom of the filter frame (10). A first water-permeable non-woven fabric layer is provided inside the first filter plate (11).

4. The rainwater collection and utilization device for urban drainage system according to claim 3, characterized in that: Plug-in blocks (19) are installed around the outer wall of the filter frame (10), and a handle is also installed on the inner wall of the filter frame (10). The inner wall of the water collection well (8) is provided with a plug-in slot (12) for inserting the plug-in block (19).

5. The rainwater collection and utilization device for urban drainage system according to claim 4, characterized in that: A flow guide frame (18) is also installed on the top of the filter frame (10), and a flow guide slope is formed on the top of the flow guide frame (18) that is inclined downward toward the inside of the filter frame (10).

6. The rainwater collection and utilization device for urban drainage system according to claim 5, characterized in that: Sealing blocks (20) that can be inserted into the insertion grooves (12) are installed around the outer wall of the guide frame (18).

7. The rainwater collection and utilization device for urban drainage system according to claim 6, characterized in that: The top of the sealing block (20) is beveled to form a flow guide portion facing the inside of the filter frame (10).

8. The rainwater collection and utilization device for urban drainage system according to claim 3, characterized in that: The inner bottom of the filter frame (10) is further provided with evenly distributed pads (21), and the pads (21) and the filter holes (22) are spaced apart. The first filter plate (11) is laid on top of the pads (21), so that a drainage gap is formed between the bottom of the first filter plate (11) and the inner bottom of the filter frame (10).

9. The rainwater collection and utilization device for urban drainage system according to claim 2, characterized in that: Limiting strips are installed on both sides of one end of the splicing block (14), and limiting slots for inserting the limiting strips are provided on both sides of the inner wall of the splicing groove (15).

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