Rainwater collecting and irrigating device and sponge roof

Abstract

The utility model discloses a rainwater collecting and irrigating device which is arranged on a roof in a covering mode and comprises a greening area, a rainwater collecting and irrigating device body and a rainwater collecting and irrigating device body, and the greening area is arranged on the roof and used for arranging a vegetation layer on the roof; the walking area is arranged on the roof, and the walking area and the greening area are arranged on the same plane; wherein the height of the walking area is consistent with that of the greening area; a water storage tank is arranged on the lower portion of the walking area and used for collecting rainwater of the greening area and the walking area so as to provide irrigation water for the vegetation layer of the greening area. The rainwater collecting and irrigating device can achieve the effects of insulating heat and improving the indoor temperature below a roof; the water storage tank is used for collecting rainwater in the walking area and the greening area, so that the pressure on the drainage system caused by direct drainage of the rainwater is reduced; rainwater is used as irrigation water, and the effect of saving water is also achieved. The water storage tank is directly arranged on the roof, so that rainwater can be extracted more conveniently during irrigation.

Description

Technical Field

[0001] This application relates to the field of roof greening, and more specifically, to a rainwater harvesting and irrigation device and a sponge roof with the rainwater harvesting and irrigation device installed on the roof top. Background Technology

[0002] In recent years, with the rise of sponge cities, the construction of sponge roofs has become increasingly common, which helps to alleviate urban flooding, improve the urban ecological environment, enhance the utilization rate of rainwater resources, and reduce the pressure on urban rainwater drainage systems.

[0003] Currently, sponge roofs typically involve laying planting soil directly on top of a waterproof layer on the roof for planting. During rainfall, excess rainwater is drained into the municipal drainage system or stored in on-ground reservoirs. During droughts, water is pumped from the ground or under the roof to deliver irrigation water. This method is not water-saving and wastes energy; the fact that rainwater is drained through the system also increases the burden on municipal drainage systems. Furthermore, in hot regions, the roofs are often not insulated, which can lead to high indoor temperatures.

[0004] Therefore, how to provide a rainwater harvesting and irrigation device that at least partially solves the above problems has become a technical problem that needs to be solved in this field. Utility Model Content

[0005] In view of this, this application proposes a rainwater harvesting irrigation device and a sponge roof.

[0006] According to one aspect of this application, a rainwater harvesting and irrigation device is provided, which is installed on a roof. The rainwater harvesting and irrigation device includes: a green area on the roof for planting a vegetation layer; and a pedestrian area on the roof, which is arranged on the same plane as the green area. The pedestrian area and the green area are at the same height. A water storage tank is provided at the lower part of the pedestrian area for collecting rainwater from the green area and the pedestrian area to provide irrigation water for the vegetation layer in the green area.

[0007] Preferably, the pedestrian area includes: a walkway for pedestrian passage; a water tank located at the bottom of the walkway; and a drain hole extending through the walkway to collect rainwater into the water tank.

[0008] Preferably, the water tank and the drain hole extend along the axial direction of the walkway; the drain holes are evenly distributed on the walkway; and the width of the water tank is the same as that of the walkway.

[0009] Preferably, the water storage tank is made of stainless steel, concrete, or fiberglass.

[0010] Preferably, the pedestrian area further includes, from bottom to top, a slope-finding layer, a leveling layer, a waterproof layer, and a protective layer on the roof top, with the water storage tank located on top of the protective layer.

[0011] Preferably, the green area on the roof top includes, from bottom to top: a slope-finding layer, a leveling layer, a waterproof layer, a protective layer, a drainage layer, planting soil, and a vegetation layer. The drainage layer collects rainwater that infiltrates through the vegetation layer and planting soil, and discharges the rainwater into the water storage tank through pipes. The opening height at the top of the water storage tank is lower than that of the drainage layer.

[0012] Preferably, the green area further includes: an elevated layer disposed between the protective layer and the drainage layer for roof insulation; and a filter layer disposed between the planting soil and the drainage layer for preventing the loss of planting soil.

[0013] Preferably, a retaining wall is set between the green area and the pedestrian area, and a water pump is installed on the retaining wall. The water pump is connected to a water storage tank through a water pumping pipe and to an irrigation system through a water supply pipe.

[0014] Preferably, the irrigation system is at least one of drip irrigation, sprinkler irrigation, and micro-drip irrigation.

[0015] According to a second aspect of this application, a sponge roof is proposed, which includes the aforementioned rainwater harvesting and irrigation device.

[0016] The rainwater harvesting and irrigation device proposed in this application, when installed on the roof, can provide insulation and improve the indoor temperature below the roof. By collecting rainwater from pedestrian and green areas using a storage tank, it reduces the pressure on the drainage system caused by direct rainwater discharge. Using rainwater for irrigation also saves water. The storage tank, directly installed on the roof, makes rainwater extraction more convenient during irrigation.

[0017] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application, and the illustrative embodiments and descriptions thereof are used to explain this application. In the drawings:

[0019] Figure 1 This is a cross-sectional schematic diagram of a rainwater harvesting and irrigation device according to a preferred embodiment of the present application.

[0020] Figure 2 This is a plan view of a rainwater harvesting and irrigation device according to a preferred embodiment of this application. Detailed Implementation

[0021] The technical solution of this application will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] like Figure 1 As shown, according to one aspect of this application, a rainwater harvesting and irrigation device is provided, which is installed on a roof 7. The rainwater harvesting and irrigation device includes: a green area, which is installed on the roof 7 for providing a vegetation layer 8 on the roof 7; and a walking area, which is installed on the roof 7 and is arranged on the same plane as the green area; wherein the walking area and the green area are at the same height; and a water storage tank 1 is provided at the lower part of the walking area for collecting rainwater from the green area and the walking area to provide irrigation water for the vegetation layer 8 in the green area.

[0023] The rainwater harvesting and irrigation device described above is the same length and width as the roof 7, and can cover the roof 7 to achieve the effect of roof 7 heat insulation and improve the indoor environment.

[0024] The specific division of the green area and pedestrian area on the roof is planned and designed according to actual needs. The water storage tank 1 is set in the lower part of the pedestrian area, which can collect and store rainwater during rainfall, reduce rainwater evaporation during drought, and provide irrigation water for the vegetation layer 8 of the green area.

[0025] The fact that the pedestrian area and the green area are at the same height can enhance the overall aesthetics of the sponge roof and improve its usability; it helps to distribute rainwater evenly, avoid water accumulation, and facilitate rainwater collection and utilization; it also helps excess rainwater that has seeped into the green area to smoothly enter the water storage tank 1.

[0026] When rainfall is low, rainwater can be collected as much as possible. When rainfall is high, the water storage tank 1 can be used to meet its storage needs first. When there is too much rainwater in the water storage tank 1, it can be drained away through the drainage system installed on the roof 7.

[0027] The rainwater harvesting and irrigation device proposed in this application is installed on the roof 7, which can serve as insulation and improve the indoor temperature below the roof 7. The rainwater harvesting tank 1 collects rainwater from the pedestrian area and green areas, reducing direct discharge of rainwater and lowering the pressure on the drainage system. Using rainwater for irrigation in the green areas achieves water conservation. The rainwater harvesting tank 1 is directly installed on the roof 7, making rainwater extraction more convenient during irrigation.

[0028] According to a preferred embodiment of this application, to enhance the practicality and functionality of the sponge roof, the pedestrian area may include: a walkway 2 for pedestrian passage; a water storage tank 1 disposed at the lower part of the walkway 2; and a drainage hole 3 penetrating the walkway 2 to collect rainwater into the water storage tank 1. The walkway 2 provides a passage for pedestrians, preventing them from trampling on the vegetation layer 8. The walkway 2 can cover the top of the water storage tank 1 in an appropriate manner, for example, by directly covering the top of the water storage tank 1. In this application, the walkway 2 is positioned higher than the water storage tank 1, and it overlaps with the retaining wall separating it from the green area, facilitating regular cleaning of the water storage tank 1. The walkway 2 can be of an appropriate form, such as reinforced concrete slab, stone slab, anti-corrosion wood, or metal grating, preferably a reinforced concrete slab. The aforementioned drainage holes 3 can be set in appropriate locations, such as on both sides of the walkway 2. In this application, the drainage holes 3 are set to penetrate the walkway 2, which can guide rainwater infiltration more evenly, prevent water from accumulating on the surface of the walkway 2, improve rainwater collection efficiency, and achieve drainage of the walkway 2 without designing a slope on a large roof area.

[0029] The aforementioned water storage tank 1 can be installed at the lower part of a section of the walkway 2 to increase the water storage capacity of the sponge roof, ensuring irrigation water for the green area even during prolonged periods without rain, eliminating the need for additional irrigation water. Preferably, the water storage tank 1 and the drainage holes 3 can extend along the axial direction of the walkway 2; the drainage holes 3 are evenly distributed on the walkway 2; and the width of the water storage tank 1 is the same as that of the walkway 2. The water storage tank 1 is evenly distributed horizontally at the lower part of the walkway 2, maximizing rainwater storage and serving as a raised layer 11 on the roof 7, effectively insulating the roof 7 and alleviating indoor temperatures. The height of the water storage tank 1 is lower than the bottom surface of the walkway 2. During rainfall, if there is excessive rainwater in the water storage tank 1, the rainwater will naturally overflow and be drained away through the drainage system installed on the roof 7. The drainage system is located at the bottom of the water storage tank 1 or below it to drain excess rainwater from the water storage tank 1. The aforementioned drainage holes 3 can be in an appropriate form, such as being evenly distributed on the pedestrian walkway. In order to avoid causing traffic hazards, in this application, the drainage holes 3 are respectively set at different positions on the surface of the pedestrian walkway to meet the drainage problems of different areas.

[0030] According to a preferred embodiment of this application, the water storage tank 1 can be made of stainless steel, reinforced concrete, or fiberglass, preferably stainless steel, to ensure that the water storage tank 1 can be used for a long time and to avoid leakage.

[0031] To prevent roof 7 from leaking, preferably, the pedestrian area and the green area on the top of the roof 7 may further include, from bottom to top: a slope-forming layer 4, a leveling layer 5, a waterproof layer, and a protective layer 6, with the water storage tank 1 located on top of the protective layer 6 in the pedestrian area. The slope-forming layer 4 is constructed using LC5.0 lightweight aggregate concrete with a minimum thickness of 30mm and a slope of 2%. The leveling layer 5 is constructed on top of the slope-forming layer 4 using 1:3 cement mortar, with a thickness of 20mm. The waterproof layer includes a common waterproof layer 16 and a root-penetration-resistant waterproof layer 17. The common waterproof layer can be one of the following: polyester-based modified bitumen waterproof membrane, self-adhesive polymer-modified waterproof membrane, polyvinyl chloride waterproof membrane, thermoplastic polyolefin waterproof membrane, polyurethane waterproof coating, or cement-based penetrating crystalline coating. The root-penetration-resistant waterproof layer can be one of the following: copper-based modified bitumen waterproof membrane, high-density polyethylene film, or metal waterproof membrane (lead-tin alloy membrane, titanium-zinc alloy membrane). The materials used in the above-mentioned waterproofing layers can be combined and used as needed, and the thickness can be set accordingly. For example, a 3mm thick polyester-based bitumen waterproofing membrane can be used for a standard waterproofing layer, while a 4mm thick copper-based modified bitumen waterproofing membrane can be used for a root-penetration resistant waterproofing layer. The protective layer 6 is constructed on top of the slope-forming layer 4 using a 1:3 cement mortar, with a thickness of 20mm. The protective layer 6 is mainly used to prevent damage to the waterproofing layer, which could cause leaks in the roof 7.

[0032] To ensure the functionality of the green area, it also includes a drainage layer 9, planting soil 10, and a vegetation layer 8. The drainage layer 9 collects rainwater that infiltrates through the vegetation layer 8 and planting soil 10, and discharges the rainwater into the water storage tank 1 through pipes. The top opening of the water storage tank 1 is lower than that of the drainage layer 9. Rainwater passing through the green area first flows through the planting soil 10. When the planting soil 10 becomes saturated with moisture, excess rainwater seeps down to the drainage layer 9 and is discharged into the water storage tank 1, preventing plant roots from being soaked. The drainage layer 9 uses a 20mm thick corrugated drainage board.

[0033] According to a preferred embodiment of this application, the green area may further include: an elevated layer 11, which is disposed between the protective layer 6 and the drainage layer 9 for roof insulation; the cross-section of the elevated layer 11 adopts an inverted convex structure to save building materials and avoid excessive pressure on the roof 7; the drainage layer 9 is directly laid on the top surface of the elevated layer 11. The elevated layer 11 is set up to ensure that the height of the drainage layer 9 is higher than the height of the water storage tank 1, facilitating the entry of infiltrated water into the water storage tank 1; and it also serves as insulation on one side of the green area, working together with the water storage tank 1 located below the pedestrian area to insulate the roof 7. To prevent the loss of planting soil 10, a filter layer 12 is disposed below the planting soil 10, which is disposed between the planting soil 10 and the drainage layer 9 to prevent the planting soil 10 from being lost. The filter layer 12 is made of geotextile, which can prevent the planting soil 10 from entering the drainage layer 9 and causing excessive soil in the water storage tank 1 as infiltrated water enters.

[0034] like Figure 1 and Figure 2 As shown, to functionally separate the green area from the pedestrian area, preferably, a retaining wall can be set between the green area and the pedestrian area. The elevated layer 11 of the green area directly overlaps the retaining wall in the horizontal direction. A water pump 13 is installed on the retaining wall, and the water pump 13 is connected to the water storage tank 1 through a water pumping pipe 14 and to the irrigation system through a water supply pipe 15. The water pump 13 is a water pump, which is connected to the mains power or powered by solar energy. A drain pipe is also installed on the retaining wall, with one end connected to the drainage layer 9 and the other end connected to the water storage tank 1. The drain pipe can be made of at least one of stainless steel, PVC, galvanized steel, and aluminum alloy, preferably stainless steel.

[0035] Preferably, the irrigation system is at least one of drip irrigation, sprinkler irrigation, and micro-drip irrigation. The irrigation method can be selected according to the actual situation. Regardless of the irrigation method used, excess irrigation water will be returned to the water storage tank 1 through the drainage layer 9 to maximize water conservation.

[0036] According to a second aspect of this application, a sponge roof is proposed, which includes the aforementioned rainwater harvesting and irrigation device.

[0037] The rainwater harvesting and irrigation device in this application is used for roof greening, comprehensively achieving energy conservation, water conservation, improved roof insulation, reduced building energy consumption, and improved indoor environment. It makes full use of roof rainwater, reduces rainwater discharge, and alleviates the drainage pressure on municipal pipe networks, enabling roof greening to better realize the role of sponge city. In addition to rainwater harvesting and irrigation for roof greening, after optimizing the structural nodes, it can be applied to other green areas that require irrigation for rainwater harvesting.

[0038] The preferred embodiments of this application have been described in detail above. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.

[0039] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

[0040] Furthermore, various different embodiments of this application can be combined in any way, as long as they do not violate the spirit of this application, they should also be regarded as the content disclosed by this invention.

Claims

1. A rainwater harvesting irrigation device, characterized in that, The rainwater harvesting and irrigation system is installed on the roof (7), and the rainwater harvesting and irrigation system includes: Green area, which is set on the roof (7) for setting a vegetation layer on the roof (7); The pedestrian area is located on the roof (7) and is set on the same plane as the green area; The pedestrian area is at the same height as the green area; a water storage tank (1) is provided at the bottom of the pedestrian area. The water storage tank (1) is used to collect rainwater from the green area and the pedestrian area to provide irrigation water for the vegetation layer (8) of the green area.

2. The rainwater harvesting and irrigation device according to claim 1, characterized in that, The pedestrian area includes: a walkway (2) for pedestrian passage; A water storage tank (1) is located at the lower part of the walkway (2); A drainage hole (3) is provided through the walkway (2) to collect rainwater into the water storage tank (1).

3. The rainwater harvesting and irrigation device according to claim 2, characterized in that, The water tank (1) and the drain hole (3) extend along the axial direction of the walkway (2); the drain hole (3) is evenly distributed on the walkway (2); the width of the water tank (1) is the same as that of the walkway (2).

4. The rainwater harvesting and irrigation device according to claim 3, characterized in that, The water storage tank (1) is made of stainless steel, reinforced concrete, or fiberglass.

5. The rainwater harvesting and irrigation device according to any one of claims 1-3, characterized in that, The pedestrian area also includes, from bottom to top, a slope-finding layer (4), a leveling layer (5), a waterproof layer, and a protective layer (6) on the roof (7), with the water storage tank (1) located on top of the protective layer (6).

6. The rainwater harvesting and irrigation device according to claim 1, characterized in that, The green area on the roof (7) from bottom to top includes: a slope-finding layer (4), a leveling layer (5), a waterproof layer, a protective layer (6), a drainage layer (9), planting soil (10), and a vegetation layer (8). The drainage layer (9) collects rainwater that seeps through the vegetation layer (8) and the planting soil (10) and discharges the rainwater into the water storage tank (1) through pipes. The opening height of the top of the water storage tank (1) is lower than that of the drainage layer (9).

7. The rainwater harvesting and irrigation device according to claim 6, characterized in that, The green area also includes: an elevated layer (11), which is located between the protective layer (6) and the drainage layer (9) for roof (7) insulation; A filter layer (12) is disposed between the planting soil (10) and the drainage layer (9) to prevent the planting soil (10) from being lost.

8. The rainwater harvesting and irrigation device according to claim 1, characterized in that, A retaining wall is set between the green area and the pedestrian area. A water pump (13) is installed on the retaining wall. The water pump (13) is connected to the water storage tank (1) through the water pumping pipe (14) and to the irrigation system through the water supply pipe (15).

9. The rainwater harvesting and irrigation device according to claim 8, characterized in that, The irrigation system is at least one of drip irrigation, sprinkler irrigation, and micro-drip irrigation.

10. A sponge roof, characterized in that, The sponge roof includes the rainwater harvesting and irrigation device as described in any one of claims 1-4 and 6-9.

Images