Rainwater-recoverable green plant water tank for overpass and use method

Abstract

The invention discloses a rainwater-recoverable green plant water tank for an overpass. The rainwater-recoverable green plant water tank 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 at the top of the water tank assembly and used for supplying water to the water tank assembly through rainwater or tap water. The fiber blanket assembly wraps the outer surface of the water tank assembly and absorbs water in the water tank assembly through the capillary action so that the water can be supplied to plant growth. The fixing device is used for fixing the water tank assembly on the pier side wall, the bridge floor outer side wall, the bridge floor bottom or the under-bridge space of the overpass; and the control system realizes automatic regulation and control of water level and water replenishing control through linkage of the water level monitor and the valve. The system can be subjected to modular treatment, is reasonable in structure, is simple and convenient to install, does not need manual control in the use process, provides extremely high ecological benefits and landscape values for cities, and has a wide application prospect.

Description

Technical Field

[0001] The present invention relates to the technical field of overpass greening and rainwater collection and utilization, and particularly relates to a green plant water tank for collecting recyclable rainwater for an overpass and a using method thereof. Background Art

[0002] At present, there are still many difficulties in overpass greening. One of them is the irrigation problem. Especially for the green belts under the overpasses, due to being blocked by the bridge bodies, they cannot obtain natural precipitation, and even need to use municipal water for irrigation on rainy days, which greatly increases the maintenance cost. On the other hand, as a renewable resource, rainwater has not been fully utilized, and the areas under overpasses are often the hardest-hit areas for waterlogging. In view of the above problems, there is an urgent need for a facility that can collect rainwater from overpasses and apply it to greening irrigation to achieve advantages and avoid disadvantages.

[0003] Another difficulty in overpass greening is the greening of the bridge wall surfaces, bottom surfaces and bridge columns. These parts are at vertical or even inverted angles, and combined with the zero adhesion of the planting substrate, it becomes one of the most difficult situations in three-dimensional greening. At present, mainly the climbing characteristics of vine plants are used for greening, and the effect is single.

[0004] To sum up, it is urgent to solve multiple problems in overpass greening, such as collecting rainwater to reduce waterlogging, reducing the plant irrigation cost, and enriching the vertical greening effect.

[0005] Therefore, a green plant water tank for collecting recyclable rainwater for an overpass and a using method thereof are proposed to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to overcome the above deficiencies and provide a green plant water tank for collecting recyclable rainwater for an overpass and a using method thereof, which can realize the collection and storage of rainwater from overpasses and supply it for plant growth. At the same time, it can green all parts of the overpass to achieve the effect of a modular green wall and enrich the greening landscape.

[0007] To solve the above technical problems, the technical solution adopted by the present invention is: a green plant water tank for collecting recyclable rainwater for an overpass, 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 at the 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 the water in the water tank assembly through capillary action to supply water for plant growth; the fixing device is used to fix the water tank assembly on the side wall of the bridge pier, the outer side wall of the bridge deck, the bottom of the bridge deck or the space under the bridge; the control system realizes automatic water level regulation and water replenishment control through the linkage of a water level monitor and a valve.

[0008] Preferably, the water supply system includes a rainwater collection device and a tap water replenishment device, both of which are arranged at the top of the water tank assembly; The rainwater collection device includes a rainwater inflow pipe, an initial rainwater runoff device, a sedimentation tank and a rainwater collection pipe; the initial rainwater runoff device is connected to a runoff pipe to discharge the initially polluted rainwater, and the sedimentation tank receives the later rainwater through a rainwater outflow pipe and flows into the water tank body through the rainwater collection pipe after sedimentation; The tap water replenishment device includes a tap water replenishment pipe and an automatic valve, which is used to replenish tap water when the water level in the water tank body is lower than the threshold value.

[0009] Preferably, the water tank assembly includes: A water tank body, with a rainwater inflow port at the top connected to the rainwater collection pipe, a water outlet valve and a water tank water level monitor at the bottom, and a rainwater overflow pipe at the upper part connected to the urban rainwater pipe network; A fertilizer cylinder, suspended on the side wall of the water tank body, realizes automatic replenishment of fertilizer particles through an "L" - shaped structure. A filter screen is arranged in the fertilizer cylinder to dissolve the slow - release fertilizer, and the inclined plane is used for the automatic sliding of fertilizer particles; A water trough, located below the water tank body, is connected to the water tank assembly through a hanging rod or a column, and a water trough water level monitor is arranged at the bottom to control the opening and closing of the water outlet valve.

[0010] Preferably, the vertical part of the fertilizer cylinder is the fertilizer particle storage area, with a spring cover at the top, and the horizontal part is the dissolution area. The fertilizer particles slide into the dissolution area through the inclined plane; the dissolution area is communicated with the water outlet valve through a water inlet, and the fertilizer solution is introduced into the water trough through a water outlet.

[0011] Preferably, the fiber blanket assembly includes: a fiber blanket, which is composed of multiple mesh structures, contains super - absorbent fibers to improve water retention, and the fiber gaps are for the growth of plant roots; a fixing frame, which is composed of a back net, a root - resistant membrane and fixing strips, is used to fix the fiber blanket and hang it on the side wall of the water tank body; a water - retaining membrane, which covers the surface of the fiber blanket, is provided with plant growth holes and is suitable for planting ornamental shrubs.

[0012] Preferably, the fixing device includes: a hanging fixing device, which is composed of a fixing bracket, a water tank hook and a hanging ring, and is used to hang the water tank assembly on the overpass bridge body; an anchor fixing device, which is composed of a support column and a tie - strap, and is used to fix the water tank assembly on the ground under the bridge.

[0013] Preferably, the control system is integrated into a mobile phone or computer program, and is connected to the water level monitor and the valve through wireless or wired means to realize automatic water replenishment, silt - cleaning reminder and fertilizer replenishment reminder.

[0014] Preferably, multiple water tank assemblies are spliced through connection buckles, the rainwater overflow pipes of the head and tail water tanks are connected in sequence, the last - stage overflow pipe is connected to the urban rainwater pipe network, and they share the same water supply system and control system.

[0015] Preferably, the installation method of the water tank is as follows: When installed in a suspended manner, the water tank body is suspended below the water tank box through a hanging rod; When installed in an earth anchor manner, the water tank body is supported on the ground through columns and a supporting plate, and the water tank box is erected above the supporting plate.

[0016] In addition, the present invention also discloses a usage method of a green plant water tank for recyclable rainwater of an overpass, which is characterized by including the following usage steps: Step1: Design and manufacture the main components, determine the size, capacity, installation location, fixing method, etc. of the green plant water tank according to the design requirements, and complete the manufacture of the water supply system, water tank assembly, fixing device and control system; Step2: Manufacture the fiber blanket assembly and cultivate plants. First, manufacture the fixing frame, and then manufacture the fiber blanket; if planting lawn grass or flower, the seeds can be sown on the surface layer of the fiber blanket. If planting ornamental shrubs, after sowing or cutting, a water retention film provided with growth holes needs to be covered on the fiber blanket; then place the fiber blanket on the root barrier film, and use anchor nails to anchor the fiber blanket and the water retention film on the fixing strip; after fixing, water the fiber blanket and carry out maintenance. After a certain period of cultivation, wait for the plants to germinate and grow before installing them on the water tank assembly; Step3: Install the fixing device. If a hanging fixing device is used, first anchor the fixing bracket on the side wall of the overpass pier, the outer side wall of the bridge deck or the bottom of the bridge deck, fix the water tank hook on the fixing bracket, and then fix the water tank hanging ring to the corresponding position of the water tank box. If an earth anchor fixing device is used, first anchor the support column underground, and then fix the tie strap at the corner of the water tank box; Step4: Install the water tank assembly. If a hanging fixing device is used, hang the water tank box on the water tank hook, and then hang the water tank on the lower part of the water tank box; if an earth anchor fixing device is used, first place the columns and the supporting plate of the water tank on the ground between the support columns, then place the water tank box on the supporting plate, tie the tie strap to the support column, then place the water tank body under the water tank box. Then, connect the rainwater overflow pipe to the urban rainwater pipe network, hang the fertilizer barrel on the side wall of the water tank box, and add fertilizer particles, and install the water tank water level monitor and the water tank water level monitor; Step5: Install the fiber blanket assembly, use the fiber blanket hook to hang the manufactured fiber blanket assembly on the water tank box, make its lower end placed in the water tank and make its bottom contact with the bottom of the water tank; Step6: Multi-module combination. If multiple modules need to be installed, repeat Step3 - Step5, and at the same time, splice multiple water tank assemblies together with connection buckles, connect the rainwater overflow pipe of the previous water tank assembly to the rainwater inflow port of the next water tank assembly, and connect the rainwater overflow pipe of the last water tank assembly to the urban rainwater pipe network; Step 7: Install the water supply system. Install the rainwater collection device on the first water tank body, 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 body and connect the tap water supply pipe to the urban tap water pipe network; Step 8: Install the control system. Install the relevant circuits and signal transmission devices, install the automatic control program on the mobile phone or computer, and connect the transmitted signals to the control program to achieve automatic control using the program. At the same time, set regular reminders for dredging the rainwater collection device and adding fertilizer particles; Step 9: Rainwater collection and tap water supply. When it rains, the rainwater enters the rainwater inlet pipe through the rainwater pipe on the overpass. Through the initial rainwater runoff device, the rainwater with relatively serious initial pollution is discharged. The discharged rainwater enters the urban sewage pipe network through the runoff pipe or replenishes groundwater through infiltration. The relatively clean rainwater in the later stage enters the sedimentation tank through the rainwater outlet pipe. The sedimentation tank further precipitates the impurities in the rainwater. The clean rainwater flows into the water tank body through the rainwater collection pipe. When the water tank is full, it flows out through the rainwater overflow pipe or enters the next water tank body. The sediment in the sedimentation tank should be regularly cleaned to ensure the normal operation of the rainwater collection device. When there is no rain for a long time, the water level in the water tank body drops to the alarm level, and the water tank level monitor sends a signal. The automatic valve in the tap water supply device opens to supplement tap water into the water tank and automatically closes when it reaches the upper water level limit; Step 10: Automatic supply of water for the water trough. When the water in the water trough reaches the lower limit, the water trough level monitor sends a signal, and the outlet valve at the bottom of the water tank body opens. The water flows into the fertilizer tank, flushes and dissolves the fertilizer particles, and then the water with fertility flows into the water trough. When the water in the water trough reaches the upper limit, the water trough level monitor sends a signal and the outlet valve closes; Step 11: Plant maintenance and replacement. The roots of the plants are distributed in the gaps of the fiber blanket. The fiber blanket absorbs water and nutrients from the water trough to supply the growth of the plants. After the fertilizer particles at the front end of the fertilizer tank are dissolved, the fertilizer particles in the upper part of the fertilizer tank can automatically supplement to the front end under the action of gravity. Just regularly supplement fertilizer according to the consumption speed of the fertilizer. If the plants need to be replaced, the fiber blanket can be removed, the waste plants can be removed, and new plants can be replanted.

[0017] The present invention has the following beneficial effects: 1. The present invention can collect and store the rainwater on the overpass, realize the resource utilization of rainwater, and at the same time reduce the occurrence of waterlogging; 2. The present invention uses the collected rainwater to supply the growth of plants, eliminating the need for additional artificial irrigation, solving the problem of water shortage for plants under the overpass, and saving the maintenance cost; 3. When greening the bridge body of the overpass, the present invention can select a variety of plant species, including lawn grass, flower or ornamental shrubs, which improves the monotony of the traditional overpass bridge body greening dominated by vine plants and enhances the grade of greening and the richness of the landscape; 4. The fixing device of the present invention provides a variety of fixing methods, which is not only applicable to various parts of the bridge body wall, bottom surface, bridge column, etc. of the overpass, but also can be placed in the rest space under the overpass as a green plant wall for separating spaces or as a decorative wall for blocking bad landscapes; 5. The control system of the present invention can monitor the water levels in the water tank and the water trough in real time and automatically control the opening and closing of each valve, without manual intervention, realizing the automation of the use process. The fertilizer cylinder can also achieve automatic replenishment and can be replaced regularly according to the prompts of the control system, saving labor costs; 6. The present invention uses a fiber blanket instead of the traditional planting substrate, which can not only play the role of water absorption and water retention, but also fix the plant roots. At the same time, a water retention film is set to slow down the water evaporation and improve the utilization rate of water; 7. The present invention also sets up a tap water supply device as a supplementary water source in case of long drought without rain to ensure the survival of plants; 8. The present invention can be modularized and can be spliced and combined according to needs to form a combined green plant water tank with a larger scale and richer shapes, which is flexible and has good scalability, can provide extremely high ecological benefits and landscape values for the city, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Front view of the overall structure; Figure 2 Side view of the overall structure; Figure 3 Schematic diagram of the 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 the fertilizer cylinder structure; Figure 7 Front view of the first method of the water trough structure; Figure 8 Side view of the first method of the water trough structure; Figure 9 Front view of the second method of the water trough structure; Figure 10 Side view of the second method of the water trough structure; 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 fixing frame structure; Figure 14 Side view of the fixing frame structure; Figure 15 Schematic diagram of the hanging fixing device; Figure 16 Schematic diagram of the ground anchor fixing device; Figure 17 Schematic diagram of modular processing; In the figure: water supply system 1, water tank assembly 2, fiber blanket assembly 3, fixing device 4, control system 5, overpass 6, rainwater pipe 7, connecting buckle 8; rainwater collection device 11, tap water supply device 12, water tank body 21, rainwater inlet 22, water tank water level monitor 23, rainwater overflow pipe 24, outlet valve 25, fertilizer cylinder 26, water trough 27, hanging ring 28, fiber blanket 31, plant 32, fixing frame 33, water retention film 34, hanging fixing device 41, ground anchor fixing device 42; rainwater inlet pipe 111, initial rainwater runoff device 112, runoff pipe 113, rainwater outlet pipe 114, sedimentation tank 115, silt cleaning valve 116, rainwater collection pipe 117, tap water supply pipe 121, automatic valve 122, fertilizer particles 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 plane 269, water trough body 271, hanging rod 272, upright column 273, supporting plate 274, water trough 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, tie strap 422. Specific implementation manners

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: As Figures 1 to 17 shown, the specific embodiment of the present invention is a green plant water tank for recyclable rainwater of an overpass, which 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 at the top of the water tank assembly 2 and uses rainwater or tap water to provide water source for the water tank assembly 2; the fiber blanket assembly 3 is wrapped 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 at the corresponding position of the overpass 6; the control system 5 is mainly used to automatically control the opening and closing of each valve to realize intelligent control during the use process.

[0020] Preferably, the water supply system 1 includes a rainwater collection device 11 and a tap water supply device 12, both of which are placed at the top of the water tank assembly 2; Among them, the rainwater collection device 11 includes a rainwater inflow pipe 111, an initial rainwater runoff device 112, a runoff pipe 113, a rainwater outflow pipe 114, a sedimentation tank 115, a silt cleaning valve 116, and a rainwater collection pipe 117. The rainwater inflow pipe 111 is arranged at the uppermost end of the rainwater collection device 11 and is connected to the rainwater pipe 7 on the overpass 6. An initial rainwater runoff device 112 is provided below it to runoff the rainwater with relatively serious initial pollution. The runoff rainwater enters the urban sewage pipe network through the runoff pipe 113 or replenishes groundwater through infiltration. The relatively clean rainwater in the later stage enters the sedimentation tank 115 through the rainwater outflow pipe 114. The sedimentation tank 115 further precipitates the impurities in the rainwater, and the clean rainwater flows into the water tank body 21 through the rainwater collection pipe 117. A silt cleaning valve 116 is provided at the bottom of the sedimentation tank 115, which can be opened regularly to clean the silt. The initial rainwater runoff device 112 can adopt various forms, such as a volumetric runoff device, a semi-volumetric runoff device, a flap-type runoff device, a jump well-type runoff device, an electric control type runoff device, etc.; The tap water supply device 12 is a supplementary water source when the rainwater is insufficient in the dry season, including a tap water supply pipe 121 and an automatic valve 122. One end of the tap water supply pipe 121 is connected to the urban tap water pipe network, and the other end is directly connected to the water tank body 21. An automatic valve 122 is provided on it, which can receive the instruction of the control system 5 to open and close the water pipe according to the water level condition of the water tank body 21.

[0021] Preferably, the water tank assembly 2 includes a water tank body 21, a rainwater inflow port 22, a water tank water level monitor 23, a rainwater overflow pipe 24, a water outlet valve 25, a fertilizer cylinder 26, a water trough 27, and hanging rings 28. The shape and size of the water tank body 21 can be designed according to needs, and it is usually designed as a wall-shaped cuboid, whose length and height are much larger than the width, and is used to store the filtered rainwater; the rainwater inflow port 22 is at the top of the water tank body 21 and is connected to the rainwater collection pipe 117; the water tank water level monitor 23 is located at the bottom of the water tank body 21 and sends a signal to the control system 5 according to the preset pressure threshold to control the opening and closing of the automatic valve 122; the rainwater overflow pipe 24 is placed at the upper part of the water tank body 21 and is connected to the urban rainwater pipe network for the overflow of excess rainwater; the water outlet valve 25 is arranged at the bottom of the water tank body 21, and a fertilizer cylinder 26 is arranged below it, and the water trough 27 is located below the water tank body 21 and the fertilizer cylinder 26; when the water outlet valve 25 is opened, the water flows into the water trough 27 through the fertilizer cylinder 26; the hanging rings 28 include a fiber blanket hanging ring 281 and a fertilizer cylinder hanging ring 282, both of which are 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 for storing fertilizer granules 261 and dissolving them in water. A fertilizer cylinder hook 262 is provided on the side so that it can be hung on the 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 cover 263 is provided at its top. The horizontal part is the space where the fertilizer granules 261 are washed and dissolved. Its end is closed, and a water inlet 264 is provided on the upper cylinder wall. The water inlet 264 is connected to the water outlet valve 25 at the bottom of the water tank body 21 through a first connecting pipe 265. A water outlet 266 is provided on the lower cylinder wall, and a filter screen 267 is provided on the water outlet 266. The water outlet 266 allows water to flow into the water trough 24 through a second connecting pipe 268, and the fertilizer granules 261 are placed on the filter screen 267. An inclined surface 269 is provided at the "L"-shaped corner to enable the fertilizer granules 261 to 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 trough 27 includes a water trough body 271, a hanging rod 272 or a column 273 and a supporting plate 274, and a water trough water level monitor 275. The length of the water trough body 271 is equivalent to that of the water tank body 21, and 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 trough body 271 and the water tank body 21: When the green plant water tank is fixed in a hanging manner, Method 1 is adopted, that is, the water trough body 271 is hung below the water tank body 21 by a hanging rod 272; when the green plant water tank is fixed by a ground anchor placed on the ground, Method 2 is adopted, that is, a column 273 and a supporting plate 274 are provided to support the water tank body 21 above the water trough body 271 placed on the ground. A water trough water level monitor 275 is installed at the bottom of the water trough body 271, and signals are sent to the control system 5 according to a preset pressure threshold to control the opening and closing of the water outlet valve 25.

[0024] Preferably, the fiber blanket assembly 3 is composed of a fiber blanket 31, a plant 32, a fixing frame 33 and a water retention film 34. Among them, the fiber blanket 31 is a multi-layer mesh structure made of chemically stable and strong fibers by textile technology or non-woven technology. It can be made of common polypropylene, olefins, polyester, nylon, acrylonitrile fibers, etc., and new super absorbent fibers such as super absorbent fiber (SAF) can also be added. Fertilizers, nutrient agents, water retention agents, etc. can also be added according to needs. The function of the fiber blanket 31 is to serve as a matrix for the growth and attachment of the plant 32. It mainly utilizes the micropores, gaps inside the fibers and capillary pores between the fibers and other microporous structures to absorb, transfer and store water through capillary action. The gaps between the fibers provide space for the root system to grow, and at the same time play a role in fixing the plant 32. Adding super absorbent fibers can further enhance the water absorption and water retention ability by using the hydrophilic groups on them. The plants 32 in the fiber blanket 31 have two growth methods. One is to sow seeds on the surface layer of the fiber blanket 31, and the seeds can be various lawn grasses, flower plants or ornamental shrubs. The other is to directly insert cuttings into the blanket, and generally ornamental shrubs are selected as cuttings. The thickness and porosity of the fiber blanket 31 are set according to the types of plants 32. The fixing frame 33 is composed of a back net 331, a root barrier film 332, fixing strips 333, a frame 334 and fiber blanket hooks 335. The back net 331 is built into a grid shape with hard strip materials and covered with a root barrier film 332 to support the fiber blanket 31. The fixing strips 333 are distributed on the left and right sides and the top of the back net 331, and anchor holes and anchor nails are provided thereon to fix the fiber blanket 31. The frame 334 is distributed around the fixing strips 333 and the back net 331 to protect and limit the fiber blanket 31. The fiber blanket hooks 335 are arranged on the back net 331 and the fixing strips 333, corresponding to the fiber blanket hanging rings 281 on the water tank body 21, and are used to hang the fixed fiber blanket 31 on the side wall of the water tank body 21. The water retention film 34 covers the surface of the fiber blanket 31, and plant growth holes 341 are arranged thereon to retain moisture and prevent the moisture in the fiber blanket 31 from evaporating too quickly. The water retention film 34 is mainly used when planting ornamental shrubs and is not required when planting lawn grasses or flower plants.

[0025] Preferably, the fixing device 4 is used to fix the green plant water tank at different positions of the overpass to adapt to different application scenarios, mainly including two situations: First, hanging on the side wall of the overpass pier, the outer side wall of the bridge deck or the bottom of the bridge deck to play the role of greening the overpass. Second, placing it in the lower space of the overpass as a green plant wall to play the role of separating space or for viewing. Corresponding to these two situations, there are two different methods for the fixing device 4: The first is to use the hanging fixing device 41, and the second is to use the ground anchor fixing device 42. The hanging 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 built into a grid shape with materials such as channel steel and angle steel and is anchored to the side wall of the overpass pier, the outer side wall of the bridge deck or the bottom of the bridge deck. A plurality of water tank hooks 412 and water tank hanging rings 413 are provided. The water tank hooks 412 are fixed on the water tank body 21, and the water tank hanging rings 413 are connected to the fixing bracket 411 to hang the water tank assembly 2 on the fixing bracket 411. The ground anchor fixing device 42 includes a support column 421 and a tie strap 422. The support column 421 is made of a high-strength steel pipe or steel column, is arranged at the corner of the water tank body 21, is anchored underground at the lower end, and is at the same height as the water tank body 21 at the upper end. A number of tie straps 422 are fixed at the corners of the water tank body 21 and tied to the support column 421. Self-locking nylon tie straps, stainless steel tie straps, 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 a computer, which is connected to the water tank level monitor 23, the sink level monitor 275 and each valve in a wired or wireless manner. According to the signals received from the level monitors, 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 particles 261.

[0027] Preferably, the present invention can be modularized. Multiple water tank components can be assembled together through the connecting buckle 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 inflow port 22 of the second water tank component 2, and so on. The rainwater overflow pipe 24 of the last water tank component 2 is connected to the urban rainwater pipe network; the fiber blanket component 3 is wrapped 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 usage method of a green plant water tank for recyclable rainwater on an overpass, which is characterized by including the following usage steps: Step1: Design and manufacture the main components, determine the size, capacity, installation location, fixing method, etc. of the green plant water tank according to the design requirements, and complete the manufacture of the water supply system 1, the water tank component 2, the fixing device 4 and the control system 5; Step2: Manufacture the fiber blanket component 3 and cultivate the plants 32. First, manufacture the fixing frame 33, and then manufacture the fiber blanket 31; if planting lawn grass or flower plants, the seeds can be sown on the surface layer of the fiber blanket 31. If planting ornamental shrubs, after sowing or cutting, the water retention film 34 provided with growth holes 341 needs to be covered on the fiber blanket 31; then place the fiber blanket 31 on the root barrier film 332, and anchor the fiber blanket 31 and the water retention film 34 on the fixing strip 333 with anchor nails; after fixing, water the fiber blanket 31 and carry out maintenance. After a certain period of cultivation, install it on the water tank component 2 after the plants germinate and grow; Step3: Install the fixing device 4. If using the hanging fixing device 41, first anchor the fixing bracket 411 on the side wall of the pier of the overpass 6, the outer side wall of the bridge deck or the bottom of the bridge deck, 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 using the ground anchor fixing device 42, first anchor the support column 421 underground, and then fix the tie strap 422 at the corner of the water tank body 21; Step 4: Install the water tank assembly 2. If the hanging fixing device 41 is adopted, hang the water tank body 21 on the water tank hook 412, and then hang the water trough 27 under the water tank body 21. If the ground anchor fixing device 42 is adopted, first place the upright posts 273 and the supporting plate 274 of the water trough 27 on the ground between the support columns 421, then place the water tank body 21 on the supporting plate 274, tie the cable tie 422 to the support column 421, then place the water trough body 271 under 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 particles 261. Install the water tank water level monitor 23 and the water trough water level monitor 275; Step 5: Install the fiber blanket assembly 3. Use the fiber blanket hook 335 to hang the fabricated fiber blanket assembly 3 on the water tank body 21, make its lower end placed in the water trough 27, and make its bottom contact with the bottom of the water trough 27; Step 6: Multi-module combination. If multiple modules need to be installed, repeat Step 3 - Step 5. At the same time, join multiple water tank assemblies 2 together with the connecting buckle 8, connect the rainwater overflow pipe 24 of the previous water tank assembly 2 to the rainwater inflow port 22 of the next water tank assembly 2, and connect the rainwater overflow pipe 24 of the last water tank assembly 2 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 inflow port 22, and connect the rainwater inflow 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 urban tap water pipe 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 achieve automatic control by using the program. At the same time, set regular reminders for dredging the rainwater collection device 11 and adding fertilizer particles 261; Step 9: Rainwater collection and tap water replenishment. When it rains, rainwater enters the rainwater inflow pipe 111 through the rainwater pipe 7 on the overpass 6. Through the initial rainwater runoff device 112, the rainwater with relatively serious initial pollution is diverted. The diverted rainwater enters the urban sewage pipe network through the runoff pipe 113 or replenishes groundwater through infiltration. The relatively clean rainwater in the later stage enters the sedimentation tank 115 through the rainwater outflow pipe 114. The sedimentation tank 115 further precipitates the impurities in the rainwater. The clean rainwater flows into the water tank body 21 through the rainwater collection pipe 117. After the water tank is full, it flows out through the rainwater overflow pipe 24 or enters 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 no rain for a long time, the water level in the water tank body 21 drops to the alarm level, and the water tank water level monitor 23 sends a signal. The automatic valve 122 in the tap water replenishment device 12 opens to replenish tap water into the water tank and automatically closes after reaching the upper water level limit; Step 10: Automatic replenishment of water for the water trough 27. When the water in the water trough 27 reaches the lower limit, the water trough water level monitor 275 sends a signal, and the water outlet valve 25 at the bottom of the water tank body 21 opens. Water flows into the fertilizer cylinder 26. After flushing and dissolving the fertilizer particles 261, the water with fertility flows into the water trough 27. When the water in the water trough 27 reaches the upper limit, the water trough water level monitor 275 sends a signal, and the water outlet valve 25 closes; Step 11: Maintenance and replacement of the plants 32. The roots of the plants 32 are distributed in the gaps of the fiber blanket 31. The fiber blanket 31 absorbs water and nutrients from the water trough 27 to supply the growth of the plants 32. After the fertilizer particles 261 at the front end of the fertilizer cylinder 26 are dissolved, the fertilizer particles 261 in the upper part of the fertilizer cylinder 26 can automatically supplement to the front end under the action of gravity. Just replenish the fertilizer regularly according to the consumption rate of the fertilizer. If it is necessary to replace the plants 32, the fiber blanket 31 can be removed, the waste plants can be removed, and new plants can be replanted.

[0029] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The protection scope of the present invention should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A rainwater recycling greening water tank for an overpass, characterized in that: It comprises 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 the 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 fiber blanket assembly (3) is wrapped around the outer surface of the water tank assembly (2) and absorbs moisture in the water tank assembly (2) through capillary action to supply the water for the growth of the plants (32); 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 control system (5) realizes automatic regulation of the water level and water replenishment control through the linkage between the water level monitor (23, 275) and the valve (25, 122).

2. The rainwater recyclable greening water tank for overpass according to claim 1 is characterized in that: The water supply system (1) comprises a rainwater collection device (11) and a tap water supply device (12), both of which are arranged at the top of the water tank assembly (2); The rainwater collection device (11) comprises a rainwater inlet pipe (111), an initial rainwater discarding device (112), a sedimentation tank (115) and a rainwater collection pipe (117); the initial rainwater discarding device (112) is connected to the discarding pipe (113) to discharge the initial polluted rainwater, and the sedimentation tank (115) receives the later rainwater through the rainwater outlet pipe (114) and after sedimentation, the later rainwater flows into the water tank body (21) through the rainwater collection pipe (117); The tap water replenishing device (12) comprises a tap water replenishing pipe (121) and an automatic valve (122), and is used to replenish tap water when the water level of the water tank body (21) is lower than a threshold value.

3. The rainwater-recyclable greening water tank for overpass according to claim 1 is characterized in that: The water tank assembly (2) comprises: A water tank body (21) is provided with a rainwater inlet (22) at the top thereof connected to a rainwater collection pipe (117), a water outlet valve (25) and a water tank water level monitor (23) at the bottom thereof, and a rainwater overflow pipe (24) at the top thereof connected to a city rainwater pipe network; A fertilizer cylinder (26) is suspended on the side wall of the water tank body (21) and realizes automatic replenishment of fertilizer particles (261) through an "L"-shaped structure. A filter (267) is arranged inside the fertilizer cylinder (26) to dissolve slow-release fertilizer, and a slope (269) is used for automatic sliding of fertilizer particles. 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). A water tank water level monitor (275) is provided at the bottom to control the opening and closing of the water outlet valve (25).

4. The rainwater-recyclable greening water tank for overpass according to claim 3 is characterized in that: The vertical portion of the fertilizer cylinder (26) is a storage area for fertilizer particles (261), with a spring cover (263) provided on the top; the horizontal portion is a dissolution area, and the fertilizer particles (261) are allowed to slide into the dissolution area via an inclined surface (269); the dissolution area is connected to a water outlet valve (25) via a water inlet (264), and fertilizer water is introduced into a water tank (27) via a water outlet (266).

5. The rainwater-recyclable greening water tank for overpass according to claim 1 is characterized in that: The fiber blanket assembly (3) comprises: a fiber blanket (31) formed of a multi-layer mesh structure, containing super absorbent fibers to improve water retention, and gaps between the fibers for the root system of a plant (32) to grow; a fixing frame (33) composed of a back net (331), a root barrier film (332) and a fixing strip (333), used to fix the fiber blanket (31) and hang it on the side wall of a water tank body (21); and a water-retaining film (34) covering the surface of the fiber blanket (31) and provided with plant growth holes (341), suitable for planting ornamental shrubs.

6. The rainwater-recyclable greening water tank for overpass according to claim 1 is characterized in that: The fixing device (4) comprises: a hanging fixing device (41), which is composed of a fixing bracket (411), a water tank hook (412) and a hanging ring (413), and is used to hang the water tank assembly (2) on the bridge body of the overpass (6); and a ground anchor fixing device (42), which is composed of a support column (421) and a cable tie (422), and is used to fix the water tank assembly (2) to the ground under the bridge.

7. The rainwater-recyclable greening water tank for overpass according to claim 1 is characterized in that: The control system (5) is integrated into a mobile phone or computer program, and is connected to a water level monitor (23, 275) and a valve (25, 122) in a wireless or wired manner, thereby realizing automatic water replenishment, dredging reminders, and fertilizer replenishment reminders.

8. The rainwater-recyclable greening water tank for overpass according to claim 1 is characterized in that: A plurality of water tank assemblies (2) are spliced ​​together via connecting buckles (8), 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 the same water supply system (1) and control system (5) are shared.

9. The rainwater-recyclable greening water tank for overpass according to claim 3 is characterized in that: The water tank (27) is installed in the following manner: When the water tank is installed in a suspended manner, the water tank body (271) is suspended below the water tank body (21) via a hanging rod (272); When the water tank is installed in a ground-anchored manner, the water tank body (271) is supported on the ground by means of columns (273) and a supporting plate (274), and the water tank body (21) is mounted above the supporting plate (274).

10. The method for using a rainwater recycling greening water tank for an overpass according to any one of claims 1 to 9, characterized in that: The usage steps include the following: Step 1: Design and manufacture the main components, determine the size, capacity, installation location, fixing method, etc. of the green plant water tank according to the design requirements, and complete the manufacture of the water supply system (1), water tank assembly (2), fixing device (4) and control system (5); Step 2: Make a fiber blanket assembly (3) and cultivate plants (32). First, make a fixing frame (33), and then make a fiber blanket (31). If lawn grass or flowers are to be planted, seeds are sown on the surface of the fiber blanket (31). If ornamental shrubs are to be planted, a water-retaining film (34) provided with growth holes (341) is required to be covered on the fiber blanket (31) after sowing or cutting. Then, the fiber blanket (31) is placed on the root barrier film (332), and the fiber blanket (31) and the water-retaining film (34) are anchored on the fixing strip (333) with anchor nails. After the fixing is completed, the fiber blanket (31) is watered and maintained. After a certain period of cultivation, the plant is installed on the water tank assembly (2) after it sprouts and grows. Step 3: Install the fixing device (4). If a 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, fix the water tank hook (412) to the fixing bracket (411), and then fix the water tank hanging ring (413) to the corresponding position of the water tank body (21). If a 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 fixture (41) is used, the water tank body (21) is hung on the water tank hook (412), and then the water tank (27) is hung below the water tank body (21). If a ground anchor fixture (42) is used, the columns (273) and the support plate (274) of the water tank (27) are first placed on the ground between the support columns (421), and then the water tank body (21) is placed on the support plate (274), and the cable tie (422) is tied to the support column (421), and then the water tank body (271) is placed below the water tank body (21). Then, the rainwater overflow pipe (24) is connected to the urban rainwater pipe network, the fertilizer cylinder (26) is hung on the side wall of the water tank body (21), and fertilizer particles (261) are added, and the water tank water level monitor (23) and the water tank water level monitor (275) are installed. Step 5: Install the fiber blanket assembly (3). Use the fiber blanket hook (335) to hang the prepared 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: Multiple module assembly. If multiple modules need to be installed, repeat Step 3 to Step 5, and simultaneously assemble multiple water tank assemblies (2) together using the connecting buckle (8), and connect the rainwater overflow pipe (24) of the previous water tank assembly (2) to the rainwater inlet (22) of the next water tank assembly (2), and connect the rainwater overflow pipe (24) of the last water tank assembly (2) 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 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, use the program to achieve automatic control, and set regular reminders for desilting the rainwater collection device (11) and adding fertilizer particles (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), and is discarded through the initial rainwater discard device (112). The discarded rainwater enters the urban sewage network through the discard pipe (113) or replenishes groundwater through infiltration. The later relatively clean rainwater enters the sedimentation tank (115) through the rainwater outflow pipe (114). The sedimentation tank (115) further precipitates impurities in the rainwater, and the clean rainwater is discharged through the rainwater outlet pipe (114). 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 enters the next water tank body (21). The silt in the sedimentation tank (115) should be cleaned regularly to ensure the normal operation of the rainwater collection device (11). When there is no rain for a long time, the water level in the water tank body (21) drops to the alarm water level, the water tank water level monitor (23) sends a signal, and the automatic valve (122) in the tap water supply device (12) opens to replenish tap water into the water tank. When the water level reaches the upper limit, it automatically closes. Step 10: Automatically replenishing water in the water tank (27). When the water in the water tank (27) reaches the lower limit, the water tank water 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 flushing and dissolving the fertilizer particles (261), the water with fertilizer flows into the water tank (27). When the water in the water tank (27) reaches the upper limit, the water tank water level monitor (275) sends a signal, and the water outlet valve (25) is closed; Step 11: Maintenance and replacement of plants (32). The root system of the plant (32) is distributed in the gaps of the fiber blanket (31). The fiber blanket (31) draws water and nutrients from the water tank (27) to supply the plant (32) with growth. After the fertilizer particles (261) at the front end of the fertilizer barrel (26) are dissolved, the fertilizer particles (261) at the upper part of the fertilizer barrel (26) can be automatically replenished to the front end under the action of gravity. The fertilizer can be replenished regularly according to the consumption rate of the fertilizer. If the plant (32) needs to be replaced, the fiber blanket (31) can be removed, the abandoned plants can be removed, and replanted.

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