Recyclable rainwater green plant water tank for overpass and use method

Abstract

The application discloses a green plant water tank capable of recycling rainwater for overpass, which comprises a water supply system, a water tank assembly, a fiber blanket assembly, a fixing device and a control system; the water supply system is located on the top of the water tank assembly and is used for supplying water to the water tank assembly through rainwater or tap water; the fiber blanket assembly is wrapped on the outer surface of the water tank assembly and absorbs moisture in the water tank assembly through capillary action to supply plant growth; the fixing device is used for fixing the water tank assembly on the side wall of a pier of the overpass, the outer side wall of a bridge deck, the bottom of the bridge deck or the space under the bridge; and the control system realizes automatic regulation and control of water level and water replenishment control through linkage of a water level monitor and a valve. The application can be processed in a modular way, has reasonable structure, is easy to install, does not need manual control in use, provides high ecological benefits and landscape value for a city and has wide application prospect.

Description

Technical Field

[0001] This invention relates to the field of greening and rainwater harvesting technology for overpasses, and particularly to a plant water tank for recycling rainwater for overpasses and its usage method. Background Technology

[0002] Currently, there are still many challenges in greening under overpasses. One major issue is irrigation, especially for the green belts beneath the overpasses. Because the overpasses block natural rainfall, the green belts often require municipal water for irrigation during rainy days, significantly increasing maintenance costs. Furthermore, rainwater, as a renewable resource, is not yet fully utilized, and the areas under overpasses are frequently prone to flooding. Therefore, there is an urgent need for a facility that can collect rainwater from overpasses and use it for greening irrigation, maximizing its benefits and minimizing its risks.

[0003] Another challenge in greening overpasses is the greening of the bridge walls, base, and pillars. These areas are vertical or even inverted, and the planting substrate has no adhesion, making it one of the most difficult aspects of vertical greening. Currently, the main approach is to utilize the climbing characteristics of vines for greening, but the effect is limited.

[0004] In summary, the greening of overpasses urgently needs to address several issues, such as rainwater collection to reduce flooding, lowering irrigation costs for plants, and enhancing the effects of vertical greening.

[0005] Therefore, a green plant water tank for recycling rainwater for overpasses and its usage method are proposed to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a green plant water tank for recyclable rainwater in overpasses and a method of use, which can collect and store rainwater from overpasses and use it to supply plant growth, while greening various parts of the overpasses to achieve the effect of modular green walls and enrich the green landscape.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a green plant water tank for recycling rainwater for overpasses, including a water supply system, a water tank assembly, a fiber blanket assembly, a fixing device, and a control system; The water supply system is located on top of the water tank assembly and is used to supply water to the water tank assembly through rainwater or tap water; the fiber blanket assembly is wrapped around the outer surface of the water tank assembly and absorbs water from the water tank assembly through capillary action to supply water for plant growth; the fixing device is used to fix the water tank assembly to the side wall of the overpass pier, the outer wall of the bridge deck, the bottom of the bridge deck, or the space under the bridge; the control system realizes automatic regulation of water level and water replenishment control through the linkage of water level monitor and valve.

[0008] Preferably, the water supply system includes a rainwater collection device and a tap water supply device, both located at the top of the water tank assembly; The rainwater collection device includes a rainwater inlet pipe, an initial rainwater diversion device, a sedimentation tank, and a rainwater collection pipe; the initial rainwater diversion device is connected to the diversion pipe to discharge the initial polluted rainwater, and the sedimentation tank receives the subsequent rainwater through the rainwater outlet pipe and, after sedimentation, flows into the water tank body through the rainwater collection pipe. The tap water supply device includes a tap water supply pipe and an automatic valve, which is used to replenish tap water when the water level in the water tank is lower than a threshold.

[0009] Preferably, the water tank assembly includes: The water tank body has a rainwater inlet at the top connected to a rainwater collection pipe, an outlet valve and a water level monitor at the bottom, and a rainwater overflow pipe at the top connected to the city's rainwater pipe network. The fertilizer cylinder is suspended on the side wall of the water tank and uses an "L"-shaped structure to automatically replenish fertilizer granules. The fertilizer cylinder is equipped with a filter screen to dissolve and slow-release fertilizer, and the inclined surface is used for the automatic sliding of fertilizer granules. The water tank is located below the water tank body and is connected to the water tank assembly via a hanging rod or column. A water level monitor is installed at the bottom of the water tank to control the opening and closing of the water outlet valve.

[0010] Preferably, the vertical part of the fertilizer cylinder is the fertilizer granule storage area, with a spring cover at the top, and the horizontal part is the dissolving area, through which the fertilizer granules slide into the dissolving area via an inclined surface; the dissolving area is connected to the water outlet valve through the water inlet, and the fertilizer solution is introduced into the water tank through the water outlet.

[0011] Preferably, the fiber blanket assembly includes: a fiber blanket composed of a multi-layer mesh structure containing superabsorbent fibers to improve water retention, with gaps between fibers for plant root growth; a fixing frame composed of a back net, a root barrier membrane, and fixing strips, used to fix the fiber blanket and suspend it to the side wall of the water tank; and a water-retaining membrane covering the surface of the fiber blanket, with plant growth holes, suitable for planting ornamental shrubs.

[0012] Preferably, the fixing device includes: a suspension fixing device, consisting of a fixing bracket, a water tank hook and a hanging ring, used to suspend the water tank assembly on the overpass bridge body; and a ground anchor fixing device, consisting of a support column and cable ties, used to fix the water tank assembly to the ground under the bridge.

[0013] Preferably, the control system is integrated into a mobile phone or computer program and connects to the water level monitor and valves wirelessly or via wired means to realize automatic water replenishment, dredging reminders, and fertilizer replenishment reminders.

[0014] Preferably, multiple water tank components are spliced ​​together by connecting buckles, the rainwater overflow pipes of the first and last water tanks are connected in sequence, the final overflow pipe is connected to the urban rainwater pipe network, and they share the same water supply system and control system.

[0015] Preferably, the water tank is installed as follows: When installed in a suspended manner, the water tank is suspended below the water tank body by a hanging rod; When using ground anchor installation, the water tank is supported on the ground by columns and support plates, and the water tank body is mounted on top of the support plates.

[0016] In addition, the present invention also discloses a method for using a rainwater recycling tank for overpasses, characterized by the following steps: Step 1: Design and manufacture the main components. Determine the size, capacity, installation location, and fixing method of the plant water tank according to the design requirements, and complete the manufacturing of the water supply system, water tank components, fixing devices, and control system. Step 2: Construct the fiber mat assembly and cultivate the plants. First, construct the support frame, then construct the fiber mat. If planting turfgrass or flowering plants, simply sow the seeds on the surface of the fiber mat. If planting ornamental shrubs, after sowing or cutting, cover the fiber mat with a water-retaining membrane containing growth holes. Then place the fiber mat on the root barrier membrane and anchor the fiber mat and water-retaining membrane to the support strip with anchors. After securing, water the fiber mat and maintain it. After a period of cultivation, once the plants have sprouted and grown, install it onto the water tank assembly. Step 3: Install the fixing device. If a hanging fixing device is used, first anchor the fixing bracket to the side wall of the bridge pier, the outer wall of the bridge deck, or the bottom of the bridge deck. Then fix the water tank hook to the fixing bracket and fix the water tank hanging ring to the corresponding position of the water tank body. If a ground anchor fixing device is used, first anchor the support column to the ground and then fix the cable tie to the corner of the water tank body. Step 4: Install the water tank components. If a hanging fixing device is used, hang the water tank body on the water tank hook, and then hang the water trough below the water tank body. If a ground anchor fixing device is used, first place the water trough column and support plate on the ground between the support columns, then place the water tank body on the support plate and tie the cable ties to the support columns. Then place the water trough body below the water tank body. Next, connect the rainwater overflow pipe to the city rainwater pipe network, hang the fertilizer container on the side wall of the water tank body, add fertilizer granules, and install the water tank level monitor and the water trough level monitor. Step 5: Install the fiber blanket assembly. Use the fiber blanket hooks to hang the finished fiber blanket assembly on the water tank body, so that its lower end is placed in the water tank and its bottom is in contact with the bottom of the water tank. Step 6: Multi-module combination. If multiple modules need to be installed, repeat Step 3-Step 5. At the same time, connect multiple water tank components together with connectors and connect the rainwater overflow pipe of the previous water tank component to the rainwater inlet of the next water tank component. Connect the rainwater overflow pipe of the last water tank component to the city's rainwater pipe network. Step 7: Install the water supply system. Install the rainwater collection device onto the first water tank, connect the rainwater collection pipe to the rainwater inlet, and connect the rainwater inlet pipe to the rainwater pipe on the overpass. Connect the tap water supply device to the first water tank and connect the tap water supply pipe to the city's tap water network. Step 8: Install the control system, install the relevant circuits and signal transmission devices, install the automatic control program on your mobile phone or computer, and connect the transmitted signals to the control program to achieve automatic control. At the same time, set up regular reminders for dredging the rainwater collection device and adding fertilizer granules. Step 9: Rainwater Harvesting and Tap Water Supply. During rainfall, rainwater enters the rainwater inlet pipe through the rainwater pipes on the overpass. The initial rainwater diversion device diverts the heavily polluted rainwater. The diverted rainwater enters the urban sewage network through the diversion pipe or replenishes groundwater through infiltration. The cleaner rainwater enters the sedimentation tank through the rainwater outlet pipe. The sedimentation tank further settles the impurities in the rainwater. The clean rainwater flows into the water tank through the rainwater collection pipe. When the rainwater tank is full, it flows out through the rainwater overflow pipe or into the next water tank. The silt in the sedimentation tank should be cleaned regularly to ensure the normal operation of the rainwater collection device. When there is a prolonged drought, the water level in the water tank drops to the alarm level. The water level monitor sends a signal, and the automatic valve in the tap water supply device opens to replenish the water tank with tap water. It automatically closes when the upper limit of the water level is reached. Step 10: Automatic water replenishment in the water tank. When the water level in the water tank reaches the lower limit, the water tank level monitor sends a signal, the water outlet valve at the bottom of the water tank opens, and water flows into the fertilizer cylinder. After rinsing and dissolving the fertilizer particles, the fertilizer-laden water flows into the water tank. When the water level in the water tank reaches the upper limit, the water tank level monitor sends a signal, and the water outlet valve closes. Step 11: Plant care and replacement. The plant roots are distributed in the gaps of the fiber blanket. The fiber blanket absorbs water and nutrients from the water tank to supply the plant's growth. After the fertilizer granules at the front of the fertilizer tube are dissolved, the fertilizer granules at the top of the fertilizer tube can be automatically replenished to the front under the action of gravity. Fertilizer can be replenished regularly according to the rate of fertilizer consumption. If you need to replace the plant, you can remove the fiber blanket, remove the waste plant, and replant.

[0017] The present invention has the following beneficial effects: 1. This invention can collect and store rainwater on overpasses, realizing the resource utilization of rainwater and reducing the occurrence of urban flooding; 2. This invention uses collected rainwater to supply plant growth, eliminating the need for additional artificial irrigation, thus solving the problem of water shortage for plants under overpasses and saving maintenance costs; 3. When greening the bridge body of an overpass, this invention allows for a variety of plant species to be selected, including lawn grass, flowering plants, or ornamental shrubs. This improves upon the traditional overpass greening, which mainly uses vines, and enhances the quality of the greening and the richness of the landscape. 4. The fixing device of the present invention provides a variety of fixing methods, which are not only applicable to various parts of the overpass such as the bridge wall, bottom surface, and bridge pillars, but can also be placed in the rest space under the overpass as a green wall to separate the space or as a decorative wall to block unpleasant views. 5. The control system of this invention can monitor the water level in the water tank and trough in real time and automatically control the opening and closing of each valve without manual intervention, thus automating the usage process. The fertilizer container can also be automatically replenished; it only needs to be replaced periodically according to the prompts of the control system, saving labor costs. 6. This invention uses a fiber blanket instead of a traditional planting substrate, which can both absorb and retain water, fix the plant roots, and at the same time set up a water-retaining film to slow down water evaporation and improve water utilization. 7. The present invention also includes a tap water supply device as a supplementary water source during prolonged droughts to ensure plant survival; 8. This invention can be modularized and can be spliced ​​and combined according to needs to form larger-scale and more varied modular green plant water tanks. It is flexible and versatile, has good scalability, can provide cities with extremely high ecological benefits and landscape value, and has broad application prospects. Attached Figure Description

[0018] Figure 1 Overall structural front view; Figure 2 Overall structural side view; Figure 3 Schematic diagram of water supply system structure; Figure 4 Front view of the water tank assembly structure; Figure 5 Side view of the water tank assembly structure; Figure 6 Schematic diagram of fertilizer cylinder structure; Figure 7 Front view of the structure of the water tank construction method 1; Figure 8 Side view of the structure of the water tank construction method 1; Figure 9 Front view of the structure of the water tank, construction method two; Figure 10 Side view of the structure of the water tank construction method 2; Figure 11 Front view of the fiber blanket assembly structure; Figure 12 Side view of the fiber blanket assembly structure; Figure 13 Front view of the fixed frame structure; Figure 14 Side view of the fixed frame structure; Figure 15 Schematic diagram of the suspension and fixing device; Figure 16 Schematic diagram of ground anchor fixing device; Figure 17 Modular processing diagram; In the diagram: 1. Water supply system; 2. Water tank assembly; 3. Fiber blanket assembly; 4. Fixing device; 5. Control system; 6. Overpass; 7. Rainwater pipe; 8. Connecting buckle; 11. Rainwater collection device; 12. Tap water supply device; 21. Water tank body; 22. Rainwater inlet; 23. Water tank level monitor; 24. Rainwater overflow pipe; 25. Outlet valve; 26. Fertilizer container; 27. Water trough; 28. Hanging ring; 31. Fiber blanket; 32. Plants; 33. Fixing frame; 34. Water-retaining membrane; 41. Suspension fixing device; 42. Ground anchor fixing device; 111. Rainwater inlet pipe; 112. Initial rainwater diversion device; 113. Diversion pipe; 114. Rainwater outlet pipe; 115. Sedimentation tank; 116. Dredging valve; 117. Rainwater collection pipe. 7. Water supply pipe 121, automatic valve 122, fertilizer granules 261, fertilizer cylinder hook 262, spring cover 263, water inlet 264, first connecting pipe 265, water outlet 266, filter screen 267, second connecting pipe 268, inclined surface 269, water tank body 271, hanging rod 272, column 273, support plate 274, water tank water level monitor 275, fiber blanket hanging ring 281, fertilizer cylinder hanging ring 282, back net 331, root barrier membrane 332, fixing strip 333, frame 334, fiber blanket hook 335, growth hole 341, fixing bracket 411, water tank hook 412, water tank hanging ring 413, support column 421, cable tie 422. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments: like Figures 1 to 17 As shown, this specific embodiment is a green plant water tank for recycling rainwater in an overpass, including a water supply system 1, a water tank assembly 2, a fiber blanket assembly 3, a fixing device 4, and a control system 5. The water supply system 1 is located on top of the water tank assembly 2 and uses rainwater or tap water to provide water to the water tank assembly 2. The fiber blanket assembly 3 wraps around the outer surface of the water tank assembly 2 and absorbs water from it to supply plant growth. The fixing device 4 is used to fix the water tank assembly 2 to the corresponding position on the overpass 6. The control system 5 is mainly used to automatically control the opening and closing of various valves to achieve intelligent operation during use.

[0020] Preferably, the water supply system 1 includes a rainwater collection device 11 and a tap water supply device 12, both of which are located on top of the water tank assembly 2; The rainwater collection device 11 includes a rainwater inlet pipe 111, an initial rainwater diversion device 112, a diversion pipe 113, a rainwater outlet pipe 114, a sedimentation tank 115, a sludge removal valve 116, and a rainwater collection pipe 117. The rainwater inlet pipe 111 is located at the top of the rainwater collection device 11 and is connected to the rainwater pipe 7 on the overpass 6. The initial rainwater diversion device 112 is located at its lower part to divert rainwater that is initially heavily polluted. The diverted rainwater enters the urban sewage network through the diversion pipe 113 or infiltrates into the ground. The groundwater is replenished, and the relatively clean rainwater enters the sedimentation tank 115 through the rainwater outflow pipe 114. The sedimentation tank 115 further settles the impurities in the rainwater. The clean rainwater flows into the water tank body 21 through the rainwater collection pipe 117. The bottom of the sedimentation tank 115 is equipped with a sludge removal valve 116, which can be opened periodically to clean the sludge. The initial rainwater diversion device 112 can take various forms, such as a volumetric diversion device, a semi-volume diversion device, a flap diversion device, a jump well diversion device, an electrically controlled diversion device, etc. The tap water supply device 12 is a supplementary water source when there is insufficient rainwater during the dry season. It includes a tap water supply pipe 121 and an automatic valve 122. One end of the tap water supply pipe 121 is connected to the city tap water network, and the other end is directly connected to the water tank body 21. An automatic valve 122 is installed on it, which can open and close the water pipe according to the water level of the water tank body 21 and receive instructions from the control system 5.

[0021] Preferably, the water tank assembly 2 includes a water tank body 21, a rainwater inlet 22, a water tank level monitor 23, a rainwater overflow pipe 24, a water outlet valve 25, a fertilizer cylinder 26, a water trough 27, and a hanging ring 28. The shape and size of the water tank body 21 can be designed as needed, and it is usually designed as a wall-shaped cuboid, with its length and height much greater than its width, for storing filtered rainwater. The rainwater inlet 22 is located at the top of the water tank body 21 and is connected to the rainwater collection pipe 117. The water tank level monitor 23 is located at the bottom of the water tank body 21 and sends a signal to the controller according to a preset pressure threshold. The control system 5 controls the opening and closing of the automatic valve 122; the rainwater overflow pipe 24 is placed on the upper part of the water tank body 21 and connected to the urban rainwater pipe network to allow excess rainwater to overflow; the outlet valve 25 is located at the bottom of the water tank body 21, and the fertilizer cylinder 26 is located below it; the water tank 27 is located below the water tank body 21 and the fertilizer cylinder 26; when the outlet valve 25 is opened, water flows through the fertilizer cylinder 26 into the water tank 27; the hanging ring 28 includes a fiber blanket hanging ring 281 and a fertilizer cylinder hanging ring 282, both located on the side wall of the water tank body 21, and are used to fix the fiber blanket assembly 3 and the fertilizer cylinder 26 respectively.

[0022] Preferably, the fertilizer cylinder 26 is an "L"-shaped container used to store fertilizer granules 261 and dissolve them in water. A fertilizer cylinder hook 262 is provided on the side so that it can be hung on a fertilizer cylinder hanging ring 282. The vertical part of the fertilizer cylinder 26 is the storage space for the fertilizer granules 261, and a spring cap 263 is provided on its top. The horizontal part is the space for the fertilizer granules 261 to be flushed and dissolved; its end is closed, and a water inlet 264 is provided on the upper cylinder wall, connected to a first connecting pipe 26. 5 is connected to the water outlet valve 25 at the bottom of the water tank body 21. A water outlet 266 is provided on the lower cylinder wall. A filter screen 267 is provided on the water outlet 266. Water flows into the water tank 24 through the water outlet 266 via the second connecting pipe 268. Fertilizer granules 261 are placed on the filter screen 267. An inclined surface 269 is provided at the "L"-shaped corner so that the fertilizer granules 261 automatically slide from the vertical part of the fertilizer cylinder 26 into the horizontal part, realizing automatic replenishment. The fertilizer granules 261 are made of water-soluble slow-release fertilizer.

[0023] Preferably, the water tank 27 includes a water tank body 271, a hanging rod 272 or a column 273 and a support plate 274, and a water tank level monitor 275. The length of the water tank body 271 is approximately the same as that of the water tank body 21. The side where the fiber blanket assembly 3 is placed protrudes from the water tank body 21. There are two ways to connect the water tank body 271 and the water tank body 21: when the green plant water tank is fixed by suspension, method one is used, that is, the water tank body 271 is suspended below the water tank body 21 by the hanging rod 272; when the green plant water tank is fixed by ground anchor, method two is used, that is, the water tank body 21 is supported above the water tank body 271 placed on the ground by setting up the column 273 and the support plate 274. The water tank level monitor 275 is installed at the bottom of the water tank body 271 and sends a signal to the control system 5 according to the preset pressure threshold to control the opening and closing of the water outlet valve 25.

[0024] Preferably, the fiber blanket assembly 3 consists of a fiber blanket 31, a plant 32, a fixing frame 33, and a water-retaining membrane 34. The fiber blanket 31 is a multi-layered mesh structure made of chemically stable and strong fibers using textile or non-woven technology. It can be made of common polypropylene, olefin, polyester, nylon, acrylonitrile fibers, etc., and can also incorporate novel super absorbent fibers such as SAF. Fertilizers, nutrients, and water-retaining agents can also be added as needed. The fiber blanket 31 serves as a substrate for the growth and attachment of the plant 32. It mainly utilizes the microporous structure such as micropores, gaps, and capillary pores between fibers to absorb, transfer, and store water through capillary effect. The gaps between fibers provide space for root growth and also fix the plant 32. Adding super absorbent fibers can further enhance water absorption and retention capacity by utilizing their hydrophilic groups. The plants 32 in the fiber blanket 31 can grow in two ways: one is to sow seeds on the surface of the fiber blanket 31, and the seeds can be various lawn grasses, flowers or ornamental shrubs; the other is to insert cuttings directly into the blanket, and the cuttings are generally ornamental shrubs; and the thickness and porosity of the fiber blanket 31 are set according to the type of plant 32. The fixing frame 33 consists of a back net 331, a root barrier membrane 332, fixing strips 333, a frame 334, and fiber blanket hooks 335. The back net 331 is made of rigid strip material and is constructed into a grid. The root barrier membrane 332 is covered on top to support the fiber blanket 31. The fixing strips 333 are distributed on the left and right sides and top of the back net 331. They are provided with anchor holes and anchor nails to fix the fiber blanket 31. The frame 334 is distributed around the fixing strips 333 and the back net 331 to protect and restrict the fiber blanket 31. The fiber blanket hooks 335 are set on the back net 331 and the fixing strips 333 and correspond to the fiber blanket hanging rings 281 on the water tank body 21. They are used to suspend the fixed fiber blanket 31 on the side wall of the water tank body 21. A water-retaining film 34 is placed on the surface of the fiber blanket 31, and plant growth holes 341 are provided on it to retain moisture and prevent the moisture inside the fiber blanket 31 from evaporating too quickly. The water-retaining film 34 is mainly used when planting ornamental shrubs, and is not needed when planting lawn grass or herbaceous flowers.

[0025] Preferably, the fixing device 4 is used to fix the green plant water tank at different locations on the overpass to adapt to different application scenarios, mainly including two situations: First, it is suspended on the side wall of the overpass pier, the outer wall of the bridge deck, or the bottom of the bridge deck to serve as a greening device for the overpass; Second, it is placed in the space under the overpass as a green wall to serve as a space divider or for viewing. Corresponding to these two situations, the fixing device 4 has two different methods: the first is to use a hanging fixing device 41, and the second is to use a ground anchor fixing device 42. The suspension and fixing device 41 includes a fixing bracket 411, a water tank hook 412, and a water tank hanging ring 413. The fixing bracket 411 is constructed into a grid shape using materials such as channel steel and angle steel, and is anchored to the side wall of the overpass pier, the outer wall of the bridge deck, or the bottom of the bridge deck. Multiple water tank hooks 412 and water tank hanging rings 413 are provided. The water tank hooks 412 are fixed to the water tank body 21, and the water tank hanging rings 413 are connected to the fixing bracket 411, suspending the water tank assembly 2 on the fixing bracket 411. The ground anchor fixing device 42 includes a support column 421 and cable ties 422. The support column 421 is made of high-strength steel pipe or steel column, and is set at the corner of the water tank body 21. The lower end is anchored to the ground, and the upper end is at the same height as the water tank body 21. Several cable ties 422 are fixed at the corner of the water tank body 21 and tied to the support column 421. Self-locking nylon cable ties, stainless steel cable ties, etc. can be used. The entire water tank assembly 2 is placed on the ground and fixed by the ground anchor fixing device 42.

[0026] Preferably, the control system 5 is an automatic control program integrated into a mobile phone or computer, which is connected to the water tank level monitor 23, the water trough level monitor 275 and each valve in a wired or wireless manner. Based on the signal received from the water level monitor, it controls the opening and closing of the valves to achieve automatic water replenishment, and can set regular reminders for the dredging of the rainwater collection device 11 and the addition of fertilizer granules 261.

[0027] Preferably, the present invention can be modularized, and multiple water tank components can be assembled together by connecting buckles 8, sharing a water supply system 1 and a control system 5. The water supply system 1 is connected to the first water tank component 2, and the rainwater overflow pipe 24 of the first water tank component 2 is connected to the rainwater inlet 22 of the second water tank component 2, and so on, with the rainwater overflow pipe 24 of the last water tank component 2 connected to the urban rainwater pipe network; the fiber blanket component 3 wraps around the outer surface of each water tank component 2, and the fixing device 4 fixes each water tank component 2.

[0028] In addition, the present invention also discloses a method for using a rainwater recycling tank for overpasses, characterized by the following steps: Step 1: Design and manufacture the main components. Determine the size, capacity, installation location, and fixing method of the plant water tank according to the design requirements, and complete the manufacturing of the water supply system 1, water tank assembly 2, fixing device 4, and control system 5. Step 2: Construct fiber mat component 3 and cultivate plants 32. First, construct the fixing frame 33, and then construct the fiber mat 31. If planting turfgrass or flowering plants, simply sow the seeds on the surface of the fiber mat 31. If planting ornamental shrubs, after sowing or cutting, cover the fiber mat 31 with a water-retaining film 34 containing growth holes 341. Then place the fiber mat 31 on the root barrier film 332 and anchor the fiber mat 31 and the water-retaining film 34 to the fixing strip 333 with anchor nails. After fixing, water the fiber mat 31 and maintain it. After a certain period of cultivation, once the plants have sprouted and grown, install it onto the water tank component 2. Step 3: Install the fixing device 4. If the hanging fixing device 41 is used, first anchor the fixing bracket 411 to the side wall of the pier of the overpass 6, the outer wall of the bridge deck, or the bottom of the bridge deck. Then fix the water tank hook 412 to the fixing bracket 411 and fix the water tank hanging ring 413 to the corresponding position of the water tank body 21. If the ground anchor fixing device 42 is used, first anchor the support column 421 to the ground and then fix the cable tie 422 to the corner of the water tank body 21. Step 4: Install water tank assembly 2. If a hanging fixing device 41 is used, hang the water tank body 21 on the water tank hook 412, and then hang the water trough 27 below the water tank body 21. If a ground anchor fixing device 42 is used, first place the upright column 273 and the support plate 274 of the water trough 27 on the ground between the support column 421, then place the water tank body 21 on the support plate 274, and tie the cable ties 422 to the support column 421. Then place the water trough 271 below the water tank body 21. Then, connect the rainwater overflow pipe 24 to the urban rainwater pipe network, hang the fertilizer cylinder 26 on the side wall of the water tank body 21, add fertilizer granules 261, and install the water tank level monitor 23 and the water trough level monitor 275. Step 5: Install the fiber blanket assembly 3. Use the fiber blanket hook 335 to hang the finished fiber blanket assembly 3 on the water tank body 21, so that its lower end is placed in the water tank 27 and its bottom is in contact with the bottom of the water tank 27. Step 6: Multi-module combination. If multiple modules need to be installed, repeat Step 3-Step 5. At the same time, assemble multiple water tank components 2 together with connecting buckles 8, and connect the rainwater overflow pipe 24 of the previous water tank component 2 to the rainwater inlet 22 of the next water tank component 2. The rainwater overflow pipe 24 of the last water tank component 2 is connected to the urban rainwater pipe network. Step 7: Install the water supply system 1, install the rainwater collection device 11 onto the first water tank 21, connect the rainwater collection pipe 117 to the rainwater inlet 22, and connect the rainwater inlet pipe 111 to the rainwater pipe 7 on the overpass 6; connect the tap water supply device 12 to the first water tank 21, and connect the tap water supply pipe 121 to the city tap water network; Step 8: Install the control system 5, install the relevant circuits and signal transmission devices, install the automatic control program on a mobile phone or computer, and connect the transmitted signals to the control program to realize automatic control. At the same time, set regular reminders for dredging the rainwater collection device 11 and adding fertilizer granules 261. Step 9: Rainwater Harvesting and Tap Water Replenishment. During rainfall, rainwater enters the rainwater inlet pipe 111 through the rainwater pipe 7 on the overpass 6. The initially heavily polluted rainwater is diverted through the initial rainwater diversion device 112. The diverted rainwater then enters the municipal sewage network through the diversion pipe 113 or replenishes groundwater through infiltration. Later, cleaner rainwater enters the sedimentation tank 115 through the rainwater outlet pipe 114. The sedimentation tank 115 further settles impurities in the rainwater, and the clean rainwater then... Rainwater collection pipe 117 flows into water tank 21. After the rainwater is full, it flows out through rainwater overflow pipe 24 or into the next water tank 21. The sediment in sedimentation tank 115 should be cleaned regularly to ensure the normal operation of rainwater collection device 11. When there is a long drought, the water level in water tank 21 drops to the alarm level. Water tank level monitor 23 sends a signal, and automatic valve 122 in tap water supply device 12 opens to replenish tap water into the water tank. It automatically closes after reaching the upper limit of the water level. Step 10: Water tank 27 is automatically replenished. When the water in water tank 27 reaches the lower limit, the water tank level monitor 275 sends a signal, the water outlet valve 25 at the bottom of the water tank body 21 opens, and water flows into the fertilizer cylinder 26. After rinsing and dissolving the fertilizer particles 261, the fertilizer-laden water flows into water tank 27. When the water in water tank 27 reaches the upper limit, the water tank level monitor 275 sends a signal, and the water outlet valve 25 closes. Step 11: Plant 32 maintenance and replacement. The roots of plant 32 are distributed in the gaps of fiber blanket 31. Fiber blanket 31 absorbs water and nutrients from water tank 27 to supply the growth of plant 32. After the fertilizer granules 261 at the front end of fertilizer cylinder 26 are dissolved, the fertilizer granules 261 at the top of fertilizer cylinder 26 can be automatically replenished to the front end under the action of gravity. Fertilizer can be replenished regularly according to the fertilizer consumption rate. If plant 32 needs to be replaced, fiber blanket 31 can be removed, discarded plants can be removed, and replanted.

[0029] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A green plant water tank for recycling rainwater in overpasses, characterized in that, It includes a water supply system (1), a water tank assembly (2), a fiber blanket assembly (3), a fixing device (4), and a control system (5); The water supply system (1) is located on top of the water tank assembly (2) and is used to supply water to the water tank assembly (2) through rainwater or tap water; the fixing device (4) is used to fix the water tank assembly (2) to the side wall of the pier, the outer wall of the bridge deck, the bottom of the bridge deck, or the space under the bridge of the overpass (6); The water tank assembly (2) includes a water tank body (21), a fertilizer cylinder (26) and a water tank (27). The top of the water tank body (21) is provided with a rainwater inlet (22) for connecting to the rainwater collection pipe (117), the bottom is provided with a water outlet valve (25) and a water tank level monitor (23), and the upper part is provided with a rainwater overflow pipe (24) for connecting to the urban rainwater pipe network. The fertilizer cylinder (26) is suspended on the side wall of the water tank body (21) and is in the shape of an "L". The vertical part of the fertilizer cylinder (26) forms a storage area for fertilizer particles (261). A spring cover (263) is provided on the top of the storage area. The horizontal part of the fertilizer cylinder (26) forms a dissolving area. An inclined surface (269) is provided at the corner of the fertilizer cylinder (26) to allow the fertilizer particles (261) to slide into the dissolving area along the inclined surface (269). A filter screen (267) is provided inside the fertilizer cylinder (26). The dissolving zone is connected to the water outlet valve (25) through the water inlet (264) and to the water tank (27) through the water outlet (266), so that when the water outlet valve (25) is opened, the water in the water tank body (21) enters the fertilizer cylinder (26), washes and dissolves the fertilizer particles (261), and then enters the water tank (27). The water tank (27) is located below the water tank body (21) and is connected to the water tank assembly (2) via a hanging rod (272) or a column (273). The bottom of the water tank (27) is equipped with a water tank level monitor (275), which is connected to the control system (5). The control system (5) is connected to the outlet valve (25) and is used to control the opening and closing of the outlet valve (25) according to the detection signal of the water tank level monitor (275). The fiber blanket assembly (3) is wrapped around the outer surface of the water tank body (21). The lower end of the fiber blanket assembly (3) is placed in the water tank (27) and absorbs water in the water tank (27) through capillary action to supply the plant (32) for growth. The control system (5) achieves automatic regulation of water level and water replenishment control through the linkage of water tank level monitor (23), water tank level monitor (275) and water outlet valve (25).

2. A green plant water tank for recycling rainwater in an overpass according to claim 1, characterized in that, The water supply system (1) includes a rainwater collection device (11) and a tap water supply device (12), both located at the top of the water tank assembly (2); The rainwater collection device (11) includes a rainwater inlet pipe (111), an initial rainwater diversion device (112), a sedimentation tank (115), and a rainwater collection pipe (117). The initial rainwater diversion device (112) is connected to the diversion pipe (113) to discharge the initial polluted rainwater. The sedimentation tank (115) receives the later rainwater through the rainwater outlet pipe (114) and after sedimentation, it flows into the water tank body (21) through the rainwater collection pipe (117). The tap water supply device (12) includes a tap water supply pipe (121) and an automatic valve (122) for replenishing tap water when the water level in the water tank (21) is below a threshold.

3. A green plant water tank for recycling rainwater in an overpass according to claim 2, characterized in that, The fiber blanket assembly (3) includes: The fiber blanket (31) is composed of a multi-layered mesh structure, containing super absorbent fibers to improve water retention, and the fiber gaps provide space for plant (32) root growth; The fixing frame (33) consists of a back net (331), a root barrier membrane (332) and a fixing strip (333), and is used to fix the fiber blanket (31) and suspend it to the side wall of the water tank body (21); A water-retaining membrane (34) is placed on the surface of a fiber blanket (31) and has plant growth holes (341) for planting ornamental shrubs.

4. A green plant water tank for recycling rainwater in an overpass according to claim 3, characterized in that, The fixing device (4) includes: The suspension fixing device (41) consists of a fixing bracket (411), a water tank hook (412) and a hanging ring (413), and is used to suspend the water tank assembly (2) on the overpass (6) bridge body; The ground anchor fixing device (42) consists of a support column (421) and cable ties (422) and is used to fix the water tank assembly (2) to the ground under the bridge.

5. A green plant water tank for recycling rainwater in an overpass according to claim 4, characterized in that, The control system (5) is integrated into a mobile phone or computer program and connects to the water tank level monitor (23), the water trough level monitor (275) and the water outlet valve (25) wirelessly or via wired means to realize automatic water replenishment, sludge removal reminders and fertilizer replenishment reminders.

6. A green plant water tank for recycling rainwater in an overpass according to claim 5, characterized in that, Multiple water tank components (2) are spliced ​​together by connecting buckles (8), and the rainwater overflow pipes (24) of the first and last water tanks are connected in sequence. The final overflow pipe is connected to the urban rainwater pipe network and shares the same water supply system (1) and control system (5).

7. A green plant water tank for recycling rainwater in an overpass according to claim 6, characterized in that, The installation method of the sink (27) is as follows: When installed in a suspended manner, the water tank body (271) is suspended below the water tank body (21) by a hanging rod (272); When the ground anchor is installed, the water tank body (271) is supported on the ground by the column (273) and the support plate (274), and the water tank body (21) is erected on the support plate (274).

8. The method of using a green plant water tank for recycling rainwater in an overpass according to claim 7, characterized in that, The following usage steps are included: Step 1: Design and manufacture the main components. Determine the size, capacity, installation location, and fixing method of the green plant water tank according to the design requirements, and complete the manufacturing of the water supply system (1), water tank components (2), fixing device (4), and control system (5). Step 2: Make the fiber blanket assembly (3) and cultivate the plants (32). First, make the fixing frame (33), and then make the fiber blanket (31). If planting lawn grass or flowers, sow the seeds on the surface of the fiber blanket (31). If planting ornamental shrubs, after sowing or cutting, cover the fiber blanket (31) with a water-retaining film (34) with growth holes (341). Then place the fiber blanket (31) on the root barrier film (332) and anchor the fiber blanket (31) and the water-retaining film (34) to the fixing strip (333) with anchor nails. After fixing, water the fiber blanket (31) and maintain it. After a certain period of cultivation, install it on the water tank assembly (2) after the plants sprout and grow. Step 3: Install the fixing device (4). If the hanging fixing device (41) is used, first anchor the fixing bracket (411) to the side wall of the pier of the overpass (6), the outer wall of the bridge deck, or the bottom of the bridge deck. Then fix the water tank hook (412) on the fixing bracket (411) and then fix the water tank hanging ring (413) to the corresponding position of the water tank body (21). If the ground anchor fixing device (42) is used, first anchor the support column (421) to the ground and then fix the cable tie (422) to the corner of the water tank body (21). Step 4: Install the water tank assembly (2). If a hanging fixing device (41) is used, hang the water tank body (21) on the water tank hook (412) and then hang the water trough (27) below the water tank body (21). If a ground anchor fixing device (42) is used, first place the upright (273) and support plate (274) of the water trough (27) on the ground between the support column (421), then place the water tank body (21) on the support plate (274) and tie the cable tie (422) to the support column (421), then place the water trough body (271) below the water tank body (21), then connect the rainwater overflow pipe (24) to the urban rainwater pipe network, hang the fertilizer cylinder (26) on the side wall of the water tank body (21) and add fertilizer granules (261), and install the water tank level monitor (23) and the water trough level monitor (275). Step 5: Install the fiber blanket assembly (3). Use the fiber blanket hook (335) to hang the finished fiber blanket assembly (3) on the water tank body (21), so that its lower end is placed in the water tank (27) and its bottom is in contact with the bottom of the water tank (27). Step 6: Multi-module combination. If multiple modules need to be installed, repeat Step 3-Step 5. At the same time, combine multiple water tank components (2) together with connecting buckles (8), and connect the rainwater overflow pipe (24) of the previous water tank component (2) to the rainwater inlet (22) of the next water tank component (2). The rainwater overflow pipe (24) of the last water tank component (2) is connected to the urban rainwater pipe network. Step 7: Install the water supply system (1), install the rainwater collection device (11) on the first water tank body (21), connect the rainwater collection pipe (117) to the rainwater inlet (22), and connect the rainwater inlet pipe (111) to the rainwater pipe (7) on the overpass (6); connect the tap water supply device (12) to the first water tank body (21), and connect the tap water supply pipe (121) to the city tap water network; Step 8: Install the control system (5), install the relevant circuits and signal transmission devices, install the automatic control program on the mobile phone or computer, and connect the transmitted signal to the control program to realize automatic control. At the same time, set regular reminders for dredging the rainwater collection device (11) and adding fertilizer granules (261). Step 9: Rainwater collection and tap water replenishment. When it rains, rainwater enters the rainwater inlet pipe (111) through the rainwater pipe (7) on the overpass (6). The rainwater with more severe initial pollution is diverted through the initial rainwater diversion device (112). The diverted rainwater enters the urban sewage network through the diversion pipe (113) or replenishes groundwater through infiltration. The cleaner rainwater enters the sedimentation tank (115) through the rainwater outlet pipe (114). The sedimentation tank (115) further settles the impurities in the rainwater. The clean rainwater then enters the rainwater outlet pipe (114) through the rainwater inlet pipe (115). The collection pipe (117) flows into the water tank body (21). After the rainwater is full, it flows out through the rainwater overflow pipe (24) or into the next water tank body (21). The sediment in the sedimentation tank (115) should be cleaned regularly to ensure the normal operation of the rainwater collection device (11). When there is a long drought, the water level in the water tank body (21) drops to the alarm level. The water level monitor (23) sends a signal, and the automatic valve (122) in the tap water supply device (12) opens to replenish the water tank with tap water. It automatically closes after reaching the upper limit of the water level. Step 10: Automatic water replenishment in the water tank (27). When the water in the water tank (27) reaches the lower limit, the water tank level monitor (275) sends a signal, and the water outlet valve (25) at the bottom of the water tank body (21) opens, and water flows into the fertilizer cylinder (26). After rinsing and dissolving the fertilizer particles (261), the fertilizer-laden water flows into the water tank (27). When the water in the water tank (27) reaches the upper limit, the water tank level monitor (275) sends a signal, and the water outlet valve (25) closes. Step 11: Plant (32) maintenance and replacement. The roots of the plant (32) are distributed in the gaps of the fiber blanket (31). The fiber blanket (31) absorbs water and nutrients from the water tank (27) to supply the plant (32) for growth. After the fertilizer granules (261) at the front end of the fertilizer cylinder (26) are dissolved, the fertilizer granules (261) at the top of the fertilizer cylinder (26) can be automatically replenished to the front end under the action of gravity. Fertilizer can be replenished regularly according to the consumption rate of fertilizer. If the plant (32) needs to be replaced, the fiber blanket (31) is removed, the waste plants are removed, and replanted.

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