A modular green roof rainwater collection and treatment device

Abstract

The present invention belongs to the technical field of rainwater collection and treatment, and particularly relates to a modular green roof rainwater collection and treatment device. Its technical solution is as follows: A modular green roof rainwater collection and treatment device includes a box body, on which a support layer is installed. A plant planting layer is arranged on the support layer, and a number of water passing holes are provided on the support layer. An aeration system and an ultraviolet lamp system are installed inside the box body; An overflow weir is further arranged inside the box body, and a lifting hydraulic rod is installed between the overflow weir and the box body. A water storage tank is arranged at the bottom of the box body, and the overflow weir is connected to the water storage tank through a drain pipe. The present invention provides a modular green roof rainwater collection and treatment device that can fully remove refractory substances.

Description

Technical Field

[0001] The present invention belongs to the technical field of rainwater collection and treatment, and particularly relates to a modular green roof rainwater collection and treatment device. Background Art

[0002] A "sponge city" refers to a city that has good "elasticity" in adapting to environmental changes and natural disasters, similar to the characteristics of a sponge. It can absorb, store, infiltrate, and purify water quality during rainfall, and release and utilize the stored water when needed. The key to realizing a sponge city lies in adopting measures such as "infiltration, retention, storage, purification, utilization, and drainage" to control the quantity, peak value, and pollution of urban rainfall runoff, and achieve resource utilization.

[0003] A green roof is a greening technology, also known as a planted roof or roof greening. It mainly consists of a roof system composed of green plants as the covering, together with a planting soil layer, a root barrier layer, a drainage layer, and a waterproof layer. According to the depth of the planting substrate and the complexity of the landscape, green roofs can be divided into simple and garden types. The characteristics of green roofs are that they can retain and purify roof rainwater, reduce runoff pollution load; increase air humidity, lower indoor and outdoor temperatures; release oxygen, retain dust, and improve air quality; fix carbon dioxide, reduce carbon emissions; do not occupy additional urban construction land, can increase the urban greening area, and beautify the environment. Green roofs are suitable for flat roofs, platforms, or roofs with a gentle slope (the slope should be less than 15%) with a cement plastered surface. When the slope exceeds 15%, anti-slip and anti-erosion facilities need to be added. Green roofs use the combined action of plants, sand, and soil microorganisms to purify rainwater to a certain extent and gradually infiltrate into the soil. However, due to technical requirements, the depth of the substrate of green roofs is determined according to plant needs and roof loads.

[0004] In recent years, green roofs have received increasing attention. However, at present, green roof technology mainly relies on the water storage and purification capabilities of the system itself, which is used for irrigating green belts or meeting low water quality requirements. However, this system has a high cost and great implementation difficulty. Its main problem lies in the insufficient ability to remove suspended solids, organic pollutants, and nutrients in the initial rainwater runoff. In actual use, light debris and sand are likely to flow into the water storage layer, resulting in blockage and a decrease in water permeability, which requires a large amount of maintenance. In addition, the key to the success of green roofs lies in maintaining good permeability. However, the current green roofs have poor permeability, limited purification ability, and low survival rate of greening vegetation, increasing the maintenance cost.

[0005] In summary, at present, the following problems exist in green roof technology: insufficient rainwater treatment capacity, low quality of recycled rainwater; green roofs cannot be dynamically adjusted according to sunlight; green roofs are all constructed at one time, and the initial rainwater treatment process cannot be adjusted in real time according to rainfall changes, etc.; roof waterproof treatment is complex, and there is a risk of penetration leakage in the later stage. Summary of the Invention

[0006] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide a modular green roof rainwater collection and treatment device that can fully remove refractory substances.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A modular green roof rainwater collection and treatment device includes a box body, a support layer is installed on the box body, a plant planting layer is arranged on the support layer, a number of water passing holes are arranged on the support layer, and an aeration system and an ultraviolet lamp system are installed inside the box body; an overflow weir is also arranged inside the box body, a lifting hydraulic rod is installed between the overflow weir and the box body, a water storage tank is arranged at the bottom of the box body, and a drain pipe is connected between the overflow weir and the water storage tank.

[0009] The aeration system of the present invention can fully aerate the rainwater flowing into the box body and provide oxygen for the growth of the upper-layer plants. The ultraviolet lamp system irradiates the rainwater to improve the removal effect of refractory organic substances in the initial rainwater. The treated rainwater is discharged into the water storage tank through the drain pipe on the overflow weir for storage, and the water in the water storage tank can be used for watering the upper-layer plants, so that the rainwater is recycled. The height of the overflow weir can be adjusted by the lifting hydraulic rod. Specifically, the rainfall amount within the rainfall time is calculated according to the rainstorm intensity formula and the rainfall time, and the height that the drainage trough of the rainwater treatment box should meet under a certain rainfall time is obtained according to the rainfall amount. The water volume in the box body can be kept stable, ensuring that the aeration system and the ultraviolet lamp system fully treat the rainwater and improving the rainwater treatment effect.

[0010] As a preferred solution of the present invention, the aeration system includes a number of aeration pipes, and a number of aeration discs are arranged on the aeration pipes; the ultraviolet lamp system includes a number of ultraviolet lamp tubes, and the number of aeration pipes and the number of ultraviolet lamp tubes are arranged at intervals. The aeration device transports gas to the aeration discs through the aeration pipes, and the aeration discs eject the gas to fully aerate the rainwater. The ultraviolet lamp tubes irradiate the rainwater to improve the removal effect of refractory organic substances in the initial rainwater. The number of aeration pipes and the number of ultraviolet lamp tubes are arranged at intervals to improve the uniformity of aeration and ultraviolet lamp irradiation.

[0011] As a preferred solution of the present invention, a drip irrigation pipeline is arranged on the plant planting layer, the drip irrigation pipeline is communicated with the water storage tank, and a soil data module for collecting, storing, and transmitting sudden data is also installed on the plant planting layer, and the soil data module is electrically connected to a control device. The water storage tank provides water source for the drip irrigation pipeline, so that the treated rainwater is fully utilized. The soil data module can transmit the temperature, humidity, pH, etc. of the soil to the control device in real time, and the above data is used as the basis for controlling the drip irrigation flow rate.

[0012] As a preferred embodiment of the present invention, the plant planting layer includes a substrate layer of planting soil, a filter layer, a permeable silica sand brick layer, and a permeable geotextile arranged in sequence from top to bottom. The filter layer includes an artificial filler layer (5 to 25 cm), a sand layer (5 to 15 cm), and a gravel layer (5 to 20 cm).

[0013] As a preferred solution of the present invention, a water retaining cover is installed in the box body, and the water retaining cover is located above the flow weir. Rainwater flows into the box body from above, and the water retaining cover can retain water for the flow weir to prevent untreated rainwater from flowing over the flow weir. The top of the water retaining cover can be tilted to facilitate rainwater to flow down.

[0014] As a preferred solution of the present invention, a mud trough is provided at the inner bottom of the box, a negative pressure mud discharge pipe is provided in the mud trough, and the inner bottom of the box is inclined downward toward the mud trough. The sludge deposited in the box can flow into the mud trough along the inclined surface of the bottom of the box, and be pumped out of the box by the negative pressure mud discharge pipe.

[0015] As a preferred solution of the present invention, a flushing mechanism for flushing sediment deposited inside the box is installed in the box, and the flushing mechanism is connected to the water storage tank. The flushing mechanism can flush the sediment deposited inside the box.

[0016] As a preferred embodiment of the present invention, the flushing mechanism includes a transverse chute, a longitudinal chute and a high-pressure nozzle, which are longitudinally fixed on the inner wall of the box, the transverse chute is slidably connected to the longitudinal chute, the high-pressure nozzle is slidably connected to the transverse chute, and the high-pressure nozzle is connected to the water tank through a pipeline. The high-pressure nozzle can slide in the transverse chute to adjust the transverse position of the high-pressure nozzle. The transverse chute can slide in the longitudinal chute to adjust the longitudinal position of the high-pressure nozzle. The high-pressure nozzle can adjust the position arbitrarily so as to flush various areas of the box.

[0017] As a preferred solution of the present invention, a tilt adjustment mechanism is installed at the bottom of the box. The tilt adjustment mechanism can adjust the tilt of the box to obtain the maximum light intensity. When collecting and flushing rainwater, the tilt of the box is adjusted to 0°.

[0018] As a preferred embodiment of the present invention, the tilt adjustment mechanism includes a base, a horizontal hydraulic rod is installed on the base, the piston rod of the horizontal hydraulic rod is rotatably connected to a rotating plate, one end of the rotating plate is rotatably connected to the base, the other end of the rotating rod is rotatably connected to a fixed plate, and the fixed plate is fixed to the bottom of the box; a slide groove is provided at the bottom of the fixed plate, a tilt control hydraulic rod is installed on the rotating plate, and the end of the piston rod of the tilt control hydraulic rod is sleeved in the slide groove. The horizontal hydraulic cylinder can push the rotating plate to tilt, and the rotating plate drives the fixed plate to move. The tilt control hydraulic rod can push the other end of the rotating fixed plate to tilt, so that the height and tilt angle of the fixed plate can be accurately adjusted to obtain the maximum light intensity. The piston rod of the tilt control hydraulic rod can slide relative to the slide groove to avoid motion interference.

[0019] The beneficial effects of the present invention are as follows:

[0020] The aeration system of the present invention can fully aerate the rainwater flowing into the box body, and provide oxygen for the growth of the upper-layer plants by stirring the rainwater inside the box body. The ultraviolet lamp system irradiates the rainwater to improve the removal effect of refractory organic matter in the initial rainwater. The treated rainwater is discharged into the storage tank through the drain pipe on the overflow weir and stored. The water in the storage tank can be used for watering the upper-layer plants, so that the rainwater can be recycled. The height of the overflow weir can be adjusted by the lifting hydraulic rod. Specifically, the rainfall amount within the rainfall time is calculated according to the rainstorm intensity formula and the rainfall time, and the height that the drainage trough of the rainwater treatment tank should meet under a certain rainfall time is obtained according to the rainfall amount. The water volume in the box body can be kept stable, ensuring that the aeration system and the ultraviolet lamp system fully treat the rainwater and improving the rainwater treatment effect. Brief Description of the Drawings

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

[0022] Figure 2 is a schematic structural diagram of the support layer and the plant planting layer;

[0023] Figure 3 is a partial structural diagram of the present invention;

[0024] Figure 4 is a partial structural diagram of the present invention when the aeration disc is removed;

[0025] Figure 5 is Figure 4 a partial enlarged view of part A in

[0026] Figure 6 is Figure 4 a partial enlarged view of part B in

[0027] Figure 7 is a schematic structural diagram of the inclination angle adjusting mechanism.

[0028] In the figure: 1 - box body; 2 - support layer; 3 - plant planting layer; 4 - aeration system; 5 - ultraviolet lamp system; 6 - overflow weir; 7 - storage tank; 8 - flushing mechanism; 9 - inclination angle adjusting mechanism; 11 - support column; 12 - sedimentation tank; 13 - negative pressure sludge discharge pipe; 21 - water passing hole; 31 - drip irrigation pipeline; 32 - soil data module; 41 - aeration pipe; 42 - aeration disc; 51 - ultraviolet lamp tube; 52 - card slot; 61 - lifting hydraulic rod; 62 - water retaining cover; 71 - drain pipe; 81 - transverse sliding groove; 82 - longitudinal sliding groove; 83 - high-pressure nozzle; 91 - base; 92 - horizontal hydraulic rod; 93 - rotating plate; 94 - fixing plate; 95 - sliding groove; 96 - inclination angle control hydraulic rod. Detailed Description of the Invention

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Components of the embodiments of the present invention that are usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0031] As Figures 1 to 6 shown, the modular green roof rainwater collection and treatment device of this embodiment includes a box body 1, a support layer 2 is installed on the box body 1, a plant planting layer 3 is arranged on the support layer 2, a number of water passing holes 21 are arranged on the support layer 2, an aeration system 4 and an ultraviolet lamp system 5 are installed inside the box body 1; an overflow weir 6 is also arranged inside the box body 1, a lifting hydraulic rod 61 is installed between the overflow weir 6 and the box body 1, a water storage tank 7 is arranged at the bottom of the box body 1, and the overflow weir 6 and the water storage tank 7 are connected by a drain pipe 71. Support columns 11 are arranged inside the box body 1, and the support layer 2 is placed on a number of support columns 11.

[0032] The aeration system 4 of the present invention can fully aerate the rainwater flowing into the box body 1 and provide oxygen for the growth of the upper-layer plants. The ultraviolet lamp system 5 irradiates the rainwater to improve the removal effect of refractory organic matter in the initial rainwater. The treated rainwater is discharged into the water storage tank 7 through the drain pipe 71 on the overflow weir 6 for storage, and the water in the water storage tank 7 can be used for watering the upper-layer plants, so that the rainwater can be recycled. The height of the overflow weir 6 can be adjusted by the lifting hydraulic rod 61. Specifically, the rainfall amount within the rainfall time is calculated according to the rainstorm intensity formula and the rainfall time, and the height that the drainage trough of the rainwater treatment tank should meet under a certain rainfall time is obtained according to the rainfall amount. The water volume inside the box body 1 can be kept stable, ensuring that the aeration system 4 and the ultraviolet lamp system 5 fully treat the rainwater and improving the rainwater treatment effect.

[0033] The water in the overflow weir 6 can be discharged into the water storage tank 7 through the drain pipe 71 by gravity, or a water pump can be connected to pump the water into the water storage tank 7. Since the height of the overflow weir 6 needs to be adjusted, the drain pipe 71 can be connected with a hose to ensure the smooth lifting of the overflow weir 6.

[0034] The lifting hydraulic rod 61 controls the overall height of the drainage trough. According to the local heavy rain intensity and rainfall time, the corresponding module size and the height of the drainage trough are designed, and the height of the drainage trough can be increased according to the actual situation to increase the amount of rainwater collected and stored.

[0035] For example, the heavy rain intensity formula in Chengdu City:

[0036] According to the heavy rain intensity formula and rainfall time, the rainfall amount A (mm) within the rainfall time can be calculated, and thus the height C (mm) (C≤A) that the drainage trough of the rainwater treatment tank should meet under a certain rainfall time can be obtained.

[0037] If the minimum water storage capacity is the target D (mm 3 ), then according to the height C (mm) of the drainage trough, the minimum bottom area of the rainwater treatment tank can be obtained, and the size of the rainwater treatment tank can be designed based on this value.

[0038] At the same time, in order to meet the contact time required for ultraviolet degradation of organic substances, the height of the drainage trough should be reduced after the reaction is complete:

[0039] Under the condition of UV254 and light intensity of 500 mW / cm*cm:

[0040] The initial rainwater COD in this area is 0 - 5 mg / L, and the total UV irradiation time should be 30 min to achieve a removal efficiency of COD of 90% or more.

[0041] The initial rainwater COD in this area is 5 - 10 mg / L, and the total UV irradiation time should be 60 min to achieve a removal efficiency of COD of 90% or more.

[0042] The initial rainwater COD in this area is >10 mg / L, and the total UV irradiation time should be 120 min to achieve a removal efficiency of COD of 90% or more.

[0043] Among them, the aeration system 4 includes a plurality of aeration pipes 41, and a plurality of aeration discs 42 are arranged on the aeration pipes 41; the ultraviolet lamp system 5 includes a plurality of ultraviolet lamp tubes 51, a card slot 52 is arranged in the box body 1, and the ultraviolet lamp tubes 51 are clamped in the card slot 52, and a plurality of aeration pipes 41 and a plurality of ultraviolet lamp tubes 51 are arranged at intervals. The aeration device transports gas to the aeration discs 42 through the aeration pipes 41, and the aeration discs 42 eject the gas to fully aerate the rainwater. The ultraviolet lamp tubes 51 irradiate the rainwater to improve the removal effect of refractory organic substances in the initial rainwater. A plurality of aeration pipes 41 and a plurality of ultraviolet lamp tubes 51 are arranged at intervals to improve the uniformity of aeration and ultraviolet lamp irradiation.

[0044] To improve the survival rate of plants, a drip irrigation pipeline 31 is provided on the plant planting layer 3. The drip irrigation pipeline 31 is communicated with the water storage tank 7. A soil data module 32 for collecting, storing, and transmitting sudden data is also installed on the plant planting layer 3. The soil data module 32 is electrically connected to a control device. The water storage tank 7 provides water source for the drip irrigation pipeline 31, making the treated rainwater fully utilized. The soil data module 32 can transmit the temperature, humidity, pH, etc. of the soil to the control device in real time, and the above data is used as the basis for controlling the drip irrigation flow rate.

[0045] The plant planting layer 3 includes a substrate layer planting soil, a filter layer, a permeable silica sand brick layer, and a permeable geotextile arranged in sequence from top to bottom. The filter layer includes an artificial filler layer (5 - 25 cm), a sand layer (5 - 15 cm), and a gravel layer (5 - 20 cm).

[0046] A water retaining cover 62 is installed in the box body 1. The water retaining cover 62 is located above the overflow weir 6. Rainwater flows into the box body 1 from above. The water retaining cover 62 can block water for the overflow weir 6 to prevent untreated rainwater from flowing through the overflow weir 6. The top of the water retaining cover 62 can be inclined to facilitate the flow of rainwater.

[0047] To timely discharge the deposited sludge, a sludge accumulation tank 12 is provided at the inner bottom of the box body 1. A negative pressure sludge discharge pipe 13 is arranged in the sludge accumulation tank 12. The inner bottom of the box body 1 slopes downward towards the sludge accumulation tank 12, and the slope is 10%. The sludge deposited in the box body 1 can flow along the inclined plane at the bottom of the box body 1 into the sludge accumulation tank 12 and be pumped out of the box body 1 by the negative pressure sludge discharge pipe 13. The negative pressure sludge discharge pipe 13 can be connected to a negative pressure pump, and the negative pressure pump pumps out the sludge.

[0048] Furthermore, a flushing mechanism 8 for flushing the sedimented sediment inside the box body 1 is installed in the box body 1. The flushing mechanism 8 is communicated with the water storage tank. The flushing mechanism 8 can flush the sedimented sediment inside the box body 1.

[0049] Specifically, the flushing mechanism 8 includes a horizontal sliding groove 81, a vertical sliding groove 82, and a high-pressure nozzle 83. It is longitudinally fixed on the inner wall of the box body 1. The horizontal sliding groove 81 is slidably connected with the vertical sliding groove 82. The high-pressure nozzle 83 is slidably connected with the horizontal sliding groove 81. The high-pressure nozzle 83 is connected to the water storage tank 7 through a pipeline. The high-pressure nozzle 83 can slide in the horizontal sliding groove 81 to adjust the horizontal position of the high-pressure nozzle 83. The horizontal sliding groove 81 can slide in the vertical sliding groove 82 to adjust the vertical position of the high-pressure nozzle 83. The high-pressure nozzle 83 can be adjusted arbitrarily to facilitate flushing of each area of the box body 1.

[0050] As Figure 7As shown in the figure, in order to dynamically adjust the angle of the box body 1 according to sunlight, an inclination angle adjusting mechanism 9 is installed at the bottom of the box body 1. The inclination angle adjusting mechanism 9 can adjust the inclination angle of the box body 1 to obtain the maximum light intensity. When rainwater is collected and the box body is flushed, the inclination angle of the box body 1 is adjusted to 0°.

[0051] Specifically, the inclination angle adjusting mechanism 9 includes a base 91. A horizontal hydraulic rod 92 is installed on the base 91. The piston rod of the horizontal hydraulic rod 92 is rotatably connected to a rotating plate 93. One end of the rotating plate 93 is rotatably connected to the base 91. The other end of the rotating rod is rotatably connected to a fixing plate 94. The fixing plate 94 is fixed to the bottom of the box body 1. A sliding groove 95 is provided at the bottom of the fixing plate 94. An inclination angle control hydraulic rod 96 is installed on the rotating plate 93. The end of the piston rod of the inclination angle control hydraulic rod 96 is sleeved in the sliding groove 95. The horizontal hydraulic cylinder can push the rotating plate 93 to tilt, and the rotating plate 93 drives the fixing plate 94 to move. The inclination angle control hydraulic rod 96 can push the other end of the fixing plate 94 to tilt, so that the height and inclination angle of the fixing plate 94 can be accurately adjusted to obtain the maximum light intensity. The piston rod of the inclination angle control hydraulic rod 96 can slide relative to the sliding groove 95 to avoid movement interference.

[0052] The present invention is a high-efficient, intelligent and controllable green roof modular technology. By introducing advanced oxidation technology, the removal effect of refractory organic matter in initial rainwater is improved. By introducing an automatic drip irrigation system, the survival rate of green roof plants is improved.

[0053] The present invention is not limited to the above optional embodiments. Any person can obtain other various forms of products under the inspiration of the present invention. However, no matter what changes are made in its shape or structure, as long as the technical solutions fall within the scope defined by the claims of the present invention, they all fall within the protection scope of the present invention.

Claims

1. A modular green roof rainwater collection and treatment device, characterized in that: It includes a box body (1), on which a support layer (2) is installed. On the support layer (2), a plant planting layer (3) is arranged. A number of water passing holes (21) are provided on the support layer (2). An aeration system (4) and an ultraviolet lamp system (5) are installed inside the box body (1); an overflow weir (6) is also arranged inside the box body (1). A lifting hydraulic rod (61) is installed between the overflow weir (6) and the box body (1). A water storage tank (7) is arranged at the bottom of the box body (1). The overflow weir (6) is connected to the water storage tank (7) through a drain pipe (71). The aeration system (4) includes a number of aeration pipes (41), and a number of aeration discs (42) are arranged on the aeration pipes (41); the ultraviolet lamp system (5) includes a number of ultraviolet lamp tubes (51), and the number of aeration pipes (41) and the number of ultraviolet lamp tubes (51) are arranged at intervals. A drip irrigation pipeline (31) is arranged on the plant planting layer (3). The drip irrigation pipeline (31) is communicated with the water storage tank (7). A soil data module (32) for collecting, storing, and transmitting sudden data is also installed on the plant planting layer (3). The soil data module (32) is electrically connected to a control device. A sedimentation tank (12) is arranged at the inner bottom of the box body (1). A negative pressure sludge discharge pipe (13) is arranged in the sedimentation tank (12). The inner bottom of the box body (1) slopes downward towards the direction close to the sedimentation tank (12). A flushing mechanism (8) for flushing the sediment deposited inside the box body (1) is installed inside the box body (1). The flushing mechanism (8) is communicated with a water storage tank. The flushing mechanism (8) includes a transverse chute (81), a longitudinal chute (82), and a high-pressure spray head (83). It is longitudinally fixed on the inner wall of the box body (1). The transverse chute (81) is slidably connected to the longitudinal chute (82). The high-pressure spray head (83) is slidably connected to the transverse chute (81). The high-pressure spray head (83) is connected to the water storage tank (7) through a pipeline. An inclination adjustment mechanism (9) is installed at the bottom of the box body (1). The inclination adjustment mechanism (9) includes a base (91). A horizontal hydraulic rod (92) is installed on the base (91). The piston rod of the horizontal hydraulic rod (92) is rotatably connected to a rotating plate (93). One end of the rotating plate (93) is rotatably connected to the base (91). The other end of the rotating rod is rotatably connected to a fixing plate (94). The fixing plate (94) is fixed to the bottom of the box body (1); a chute (95) is arranged at the bottom of the fixing plate (94). An inclination control hydraulic rod (96) is installed on the rotating plate (93). The end of the piston rod of the inclination control hydraulic rod (96) is sleeved in the chute (95).

2. The modular green roof rainwater collection and treatment device according to claim 1, characterized in that: The plant planting layer (3) includes a substrate layer planting soil, a filter layer, a permeable silica sand brick layer, and a permeable geotextile from top to bottom in sequence.

3. The modular green roof rainwater collection and treatment device according to claim 1, characterized in that: A water retaining cover (62) is installed inside the box body (1). The water retaining cover (62) is located above the overflow weir (6).

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