Rainwater collection and purification unit, water resource conservation and reuse irrigation system and method

Abstract

The application belongs to the technical field of rainwater recycling, and specifically discloses a rainwater collecting and purifying unit, a water resource saving and recycling irrigation system and a method. The collecting and purifying unit takes a tire ring cut from a waste tire as a carrier, is stably attached to a slope surface through a positioning rib, is filled with a filler in a cavity, and is provided with a water guide arranged in a corresponding area of the central hole and directly reaching a deep soil body. An intercepting filter screen is connected between adjacent tire rings, and is matched with an inverted V-shaped water stop plate and an elastic member to dynamically control the flood drainage rhythm. The irrigation system integrates the unit, a water pump, a controller and a soil sensor to build a system for collecting, purifying, dynamically draining and deep water supplementing rainwater on demand. The application realizes multi-target cooperation of rainwater utilization, ecological restoration and slope reinforcement, and significantly improves the rainwater recycling efficiency and the ecological restoration effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rainwater recycling, in particular to a rainwater collection and purification system, a water resource recycling irrigation system and method. BACKGROUND

[0002] As a clean and renewable natural resource, rainwater has become the core research direction in the field of comprehensive utilization of water resources in the face of the increasingly prominent problem of water resource shortage. However, the recycling of slope rainwater has long been plagued by technical bottlenecks, becoming a weak link in the rainwater recycling system.

[0003] Currently, the following problems exist in the collection of slope rainwater:

[0004] Firstly, slope rainwater is prone to carry impurities such as soil particles, fallen leaves, and gravel during runoff. Existing slope rainwater collection devices are mostly designed for simple flow diversion, lacking targeted filtration and purification structures. The collected rainwater has high impurity content and poor water quality, which can easily block equipment and pipelines, making it difficult to be directly used in scenarios such as vegetation irrigation.

[0005] Secondly, the total amount of slope rainwater runoff varies significantly under different rainfall intensities. Existing slope rainwater collection devices are mostly fixed structures that cannot dynamically adjust the collection and drainage rhythm according to rainfall. The installation of rainwater collection devices on the slope forms a rain-blocking structure. When it rains heavily, the slow water flow caused by the rain-blocking structure can easily accumulate, causing waterlogging and drowning grass or plants. Slow drainage can also cause excessive soaking of the slope, leading to disintegration of accumulated water.

[0006] Thirdly, existing slope rainwater collection devices mostly only have single flow diversion or storage functions and are not organically combined with ecological restoration and resource recycling needs. For example, some devices focus only on rainwater collection efficiency, ignoring slope surface structure stability protection; or they emphasize filtration and purification without considering the promotion of vegetation growth during the collection process, resulting in poor overall engineering benefits.

[0007] Fourthly, in existing technologies, traditional irrigation methods such as surface spraying are often used for slope rainwater recycling irrigation. For example, a kind of slope protection drip irrigation and growth is proposed in the authorized announcement number for utility model patent CN215602363U, which uses a traditional spray pipe form. This spray form has the problems of fast water evaporation and insufficient deep penetration, and cannot dynamically adjust according to soil moisture conditions, causing water resource waste and difficulty in meeting the deep water needs of vegetation growth. SUMMARY

[0008] The present application aims to at least partially solve one of the technical problems in the related art. To this end, a rainwater collection and purification unit, a water resource conservation and recycling irrigation system, and a method are proposed.

[0009] The technical scheme for solving the technical problems of the present application is:

[0010] In the first aspect, the present technical scheme provides a rainwater collection and purification unit, which comprises a plurality of purification assemblies arranged on a slope surface, wherein each purification assembly comprises a tire ring formed by cutting a waste tire along a center line, a tire side of the tire ring is attached to the slope surface with the tire side facing downward, a plurality of positioning ribs are arranged on the tire side in a circumferential direction, and the positioning ribs are inserted into the soil of the slope surface to fix the tire ring.

[0011] The tire ring forms an annular cavity, a center hole is arranged in a central region of the annular cavity, at least one water guide is arranged in a corresponding region of the center hole on the slope surface, a bottom end of the water guide is inserted into a deep soil layer of the slope surface, and a top end of the water guide extends through the center hole and is above the tire ring.

[0012] A filler is filled in the annular cavity of the tire ring and around the water guide, so as to filter and purify the rainwater entering the cavity.

[0013] A plurality of first holes are arranged in the upper tire surface of the tire ring, and a plurality of second holes are arranged in the lower tire surface of the tire ring, wherein the diameters of the first holes are smaller than the diameters of the second holes.

[0014] A water collecting ditch is arranged at a slope toe of the slope, and a water collecting well is connected to one side of the water collecting ditch.

[0015] Preferably, the water guide comprises an inner core pipe, a plurality of permeation holes are arranged on the inner core pipe, and a fiber bundle is wound on an outer wall of the inner core pipe.

[0016] Preferably, the water guide forms an acute angle of 30°-45° with the slope surface.

[0017] Preferably, the plurality of purification assemblies are arranged in multiple rows along contour lines of the slope surface in a spaced manner, the purification assemblies in adjacent rows are arranged in a staggered manner, an intercepting screen is further connected between the purification assemblies in each row, the intercepting screen is connected to the tire ring, a water blocking plate in an inverted V shape is arranged between adjacent tire rings, an elastic member is connected between the intercepting screen and the water blocking plate, and in an initial state, an elastic force of the elastic member makes an inner side wall of the water blocking plate tightly contact an outer wall of the tire ring.

[0018] Preferably, the intercepting screen is detachably connected to a top edge of the tire ring by a wire or a bandage.

[0019] Preferably, the tire ring is provided with a notch, the intercepting screen is inserted into the notch, and the filler is filled between the intercepting screen and an inner wall of the tire ring to press and fix the intercepting screen.

[0020] In the second aspect, the present technical scheme further provides a construction method of the rainwater collection and purification unit, and the method comprises the following steps.

[0021] S1, field survey and slope pretreatment:

[0022] Survey the slope gradient, soil type and slope toe terrain, determine the layout position of the purification assembly and the excavation range of the water collection ditch and well; clean the slope surface, flatten the protruding and recessed areas, compact the soft soil body to ensure the overall stability of the slope surface;

[0023] S2, tire ring installation and positioning:

[0024] According to the design requirements, mark the points, place the tire ring with the tire side down on the marked points, insert the positioning rib into the soil through the tire side, fix the tire ring to ensure firmness;

[0025] S3, installation of water guide and filling of filler:

[0026] Drill a hole in the center hole of the tire ring corresponding to the slope position, insert the water guide, and ensure that the top end of the water guide extends out of the tire ring; fill the filler inside the tire ring and around the water guide and lightly tamp it;

[0027] S4, installation of interception filter screen and water stop plate:

[0028] Install inverted V-shaped water stop plates between adjacent tire rings, connect the ends of the elastic member to the interception filter screen and the water stop plate respectively, adjust the tension of the elastic member to ensure that the water stop plate is tightly attached to the outer wall of the tire ring in the initial state;

[0029] S5, water collection ditch and well construction:

[0030] Excavate the water collection ditch and well according to the slope toe marking range, and lay HDPE impermeable membrane on the inner wall of the water collection ditch and well;

[0031] S6, slope vegetation planting:

[0032] Plant deep-rooted plants or lay vegetation mats in the blank areas on the slope surface except for the tire rings.

[0033] In a third aspect, the technical scheme provides a water resource saving and recycling irrigation system, comprising the rainwater collection and purification unit; a water pump is arranged in the water collection well, and the top of the inner core pipe is connected with the water pump through a water diversion pipeline; the system further comprises a controller connected with the water pump.

[0034] Preferably, a plurality of soil sensors are arranged in the soil of the slope in a grid shape, and are arranged in layers along the soil depth;

[0035] The soil sensors are electrically connected with the controller, and are used to collect soil moisture data at different depths and different areas and transmit the data to the controller.

[0036] In a fourth aspect, the technical solution provides a use method of the water resource saving and recycling irrigation system.

[0037] a. Collect and purify during rainfall:

[0038] After the rain falls on the slope, the large impurities are first blocked by the interception filter screen at the top of the tire ring;

[0039] The filtered rainwater enters the inside through the first hole at the upper part of the tire ring, is further filtered and purified by the filler, and removes the fine particulate matters in the rainwater;

[0040] Part of the purified rainwater infiltrates the soil around the water guide, and nourishes the shallow root system; the excess rainwater is quickly discharged through the second hole at the lower part of the tire ring and is collected into the water collecting well for storage;

[0041] When the rainfall is relatively large, the rainwater is stored between the water blocking plate and the tire ring, the pressure overcomes the tension of the elastic member, the water blocking plate automatically moves downward, the drainage is accelerated, and the slope is prevented from being soaked;

[0042] b. Irrigation and recycling:

[0043] The soil sensor collects the soil moisture data of different areas of the slope in real time and continuously transmits the data to the controller; when there is no rainfall, the water pump in the water collecting well is automatically started when the controller detects that the deep soil moisture content is lower than the set threshold, the collected rainwater is transported to the inner core pipe of the water guide through the water guide pipeline, and is slowly infiltrated into the deep soil through the infiltration holes and the fiber bundle, so that the deep water replenishment is realized; the controller automatically closes the water pump when the water content reaches the standard.

[0044] The above technical solution has the following advantages or beneficial effects:

[0045] 1. The rainwater collecting and purifying unit takes the tire ring cut from the waste tire as the core component: on the one hand, the annular rigidity and weather resistance of the tire ring are adapted to the slope, and the filler is fixed after being fixed by the positioning rib, so that the high value utilization of solid waste is realized; on the other hand, the tire ring is filled with fillers to form a filter layer, and after the rainwater enters through the first hole at the upper part, the fillers are flowed through to effectively remove the suspended solids, so that the collection and purification are synchronized.

[0046] 2. In the present solution, the inverted V-shaped water blocking plate is linked with the elastic member, which can be automatically adjusted according to the rainfall: when it rains lightly, the elastic tension of the elastic member makes the water blocking plate closed, and the rainwater is forced to flow through the fillers to complete the filtration; when it rains heavily or heavily, the water pressure overcomes the tension of the elastic member, the water blocking plate automatically moves downward to realize rapid flood discharge, and the slope is prevented from being soaked. Through this dynamic adjustment, different rainfall intensities are adapted, and the safety of rainwater purification and flood discharge is considered.

[0047] 3. The scheme is characterized in that the water guide is inclined into the soil layer, the outer wall of the inner core tube of the water guide is wound with fiber bundles, the fiber bundles are soft and flexible, can buffer the lateral extrusion force of the soil layer in the inclined state, avoid deformation of the inner core tube, the gaps of the fiber bundles can form small water capsules, so that water has enough time to penetrate into deep soil, avoid water flow along the surface of the water guide, ensure long-term moisture of deep root zone, induce plant roots to grow in deep soil, enhance the slope reinforcement capacity, realize rainwater utilization, ecological restoration and slope reinforcement.

[0048] 4. The water resource saving and recycling irrigation system is based on a rainwater collection and purification unit, and through intelligent components such as soil sensors and controllers, realizes a complete closed loop of efficient rainwater collection, synchronous purification, dynamic flood drainage and on-demand recycling, reduces engineering cost and environmental pollution through solid waste resource utilization such as waste tires, meets the water demand of deep root system of vegetation through intelligent regulation and control of soil sensors and controllers, and at the same time, strengthens the stability of slope structure, finally realizes multiple benefits of water saving, environmental protection, ecological restoration and engineering safety. BRIEF DESCRIPTION OF DRAWINGS

[0049] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application together with the embodiments thereof, and explain the present application, but do not constitute a limitation of the present application.

[0050] Figure 1 is a perspective view of the water resource saving and recycling irrigation system.

[0051] Figure 2 is a top view of the cooperation relationship among the purification assembly, the water blocking plate and the interception filter screen in one of the embodiments.

[0052] Figure 3 is a perspective view of the cooperation relationship between the tire ring, the positioning rib and the water guide in the purification assembly.

[0053] Figure 4 is a structural sectional view of the purification assembly installed on the slope.

[0054] Figure 5 is a perspective view of the cooperation relationship among the purification assembly, the water blocking plate and the interception filter screen in another embodiment.

[0055] Figure 6 is Figure 5 is an exploded view of the cooperation relationship among the purification assembly, the water blocking plate and the interception filter screen.

[0056] Figure 7 is a structural perspective view of the water guide.

[0057] BRIEF DESCRIPTION OF DRAWINGS

[0058] 1. Slope; 2. Purification components; 3. Water-blocking plate; 4. Slope surface; 5. Intercepting filter screen; 6. Water collection ditch; 7. Water collection well; 8. Main pipeline; 9. Branch pipeline; 10. Plants;

[0059] 21. Tire bead; 22. Positioning rib; 23. Water guide; 231. Inner core; 232. Fiber bundle; 24. Filler; 211. Tread; 212. Sidewall; 2111. First hole; 2112. Second hole; 2113. Groove. Detailed Implementation

[0060] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0061] Example 1:

[0062] like Figure 1 - Figure 7 As shown, this embodiment proposes a rainwater harvesting and purification unit applied to slope 1, aiming to efficiently recycle and utilize rainwater resources from slope 1 while simultaneously considering ecological restoration and solid waste resource utilization. The unit comprises multiple sets of purification components 2 installed on the slope surface 4 of slope 1. These purification components 2 are arranged in multiple rows at intervals along the contour lines of slope surface 4, with adjacent rows of purification components 2 arranged in a staggered manner to form a fully covered rainwater purification network. The specific structural form of the purification components 2 is as follows:

[0063] The purification component 2 includes a tire bead 21 formed by splitting a waste tire in two along its centerline. The tire sidewall 212 of the tire bead 21 is placed against the slope 4 with its sidewall facing downwards. The sidewall 212 can naturally fit against the slope 4 of the slope 1, greatly improving contact stability. Several positioning ribs 22 are inserted circumferentially through the sidewall 212. The positioning ribs 22 are inserted into the soil of the slope 4 to fix the tire bead 21. In some feasible solutions, the positioning ribs 22 can be threaded steel bars, bamboo poles, or wooden poles to adapt to different working conditions.

[0064] The tire bead 21 forms an annular cavity with a through central hole in its central area. At least one water guide 23 is inserted in the corresponding area of ​​the central hole on the slope 4 to achieve deep water injection. The bottom end of the water guide 23 extends into the deep soil of the slope 4, and the top end extends through the central hole to the top of the tire bead 21 for easy connection of pipelines.

[0065] The annular cavity inside the tire ring 21 and the four sides of the water guide 23 are filled with filler 24 for filtering and purifying the rainwater entering the cavity; the filler 24 is made of gravel with a particle size of 10-20 mm and coarse sand with a particle size of 5-10 mm mixed in a ratio of 3:1, the filling height is flush with the upper edge of the tire ring 21, and the layers are lightly tamped, which can efficiently intercept impurities in the rainwater and purify the rainwater.

[0066] The tire tread 211 on the upper part of the tire ring 21 is provided with a plurality of first holes 2111, and the tire tread 211 on the lower part is provided with a plurality of second holes 2112, the diameter of the first hole 2111 is smaller than the diameter of the second hole 2112; the first hole 2111 is used to control the flow rate of rainwater entering the annular cavity to ensure sufficient filtration; the diameter of the second hole 2112 is larger than that of the first hole 2111, which is suitable for the requirement of rapid drainage in heavy rain to avoid water accumulation in the cavity.

[0067] The toe of the slope 1 is provided with a water collecting ditch 6, and one side of the water collecting ditch 6 is connected with a water collecting well 7. The inner walls of the water collecting ditch 6 and the water collecting well 7 are paved with HDPE anti-seepage film to prevent rainwater from seeping, and a grating protection cover is installed on the top of the water collecting well 7 to prevent debris from entering and polluting the stored rainwater.

[0068] The rainwater collecting and purifying unit described above takes the tire ring 21 cut from the waste tire as the core component: on the one hand, its annular rigidity and weather resistance adapt to the slope 1, and after being fixed by the positioning rib 22, it bears the filler 24, realizing high-value utilization of solid waste; on the other hand, the tire ring 21 is filled with filler 24 to form a filter layer, after the rainwater enters through the first hole 2111 on the upper part, it flows through the filler 24 to effectively remove suspended solids, realizing simultaneous collection and purification.

[0069] In some embodiments, the water guide 23 includes an inner core pipe 231, the inner core pipe 231 is provided with a plurality of permeable holes, and the outer wall of the inner core pipe 231 is wrapped with a fiber bundle 232, which plays a role in adsorbing and storing water and slowly releasing water. The porous structure of the fiber bundle 232 can adsorb and store the rainwater filtered by the filler 24, and cooperate with the permeable holes of the inner core pipe 231 to make the water slowly and uniformly infiltrate the deep soil, avoiding rapid loss; at the same time, the buffering property of the fiber bundle 232 can also assist in dispersing the water flow, prolonging the residence time of water in the deep soil layer, which not only meets the water demand of the deep root system of the plant 10, but also further strengthens the irrigation effect.

[0070] In some embodiments, the water guide 23 forms an acute angle of 30°-45° with the slope surface 4. The water guide 23 is not inserted vertically into the slope 1, and the reason for this design is:

[0071] When the water guide 23 is at an acute angle of 30°-45°, the top end of the water guide 23 extends out of the tire ring 21, but the pipe body forms an inclined angle with the slope surface 4. When the filtered rainwater contacts the surface of the water guide 23, it will flow along the outer wall of the pipe into the filler 24 layer around the tire ring 21 due to the consistent direction of gravity and slope surface 4 runoff, rather than directly flowing into the pipe. At the same time, the inclined pipe cavity is easy to form a water film retention effect, and rainwater is difficult to penetrate down the pipe cavity under no pressure, and finally only a small amount of rainwater slowly infiltrates the surrounding soil through the infiltration hole and fiber bundle 232, thereby avoiding the concentration of a large amount of rainwater into deep soil to cause over-saturation. If the water guide 23 is vertically inserted, the pipe cavity of the water guide 23 is in a straight passage shape, and rainwater will directly flow into the deep layer along the pipe cavity during rainfall, causing the deep soil to exceed the standard in a short time, and causing problems such as soil softening and decrease in slope 1 anti-skid performance.

[0072] However, the angle design does not affect the irrigation function. When the water pump is started, rainwater will break through the gravity resistance of the inclined pipe cavity under the action of pressure, quickly fill the pipe cavity, and then spread to the deep soil through the infiltration hole and fiber bundle 232.

[0073] The water guide 23 has the following application effects:

[0074] The water guide 23 is inclined and deeply inserted into the soil layer, the outer wall of the inner core pipe 231 of the water guide 23 is wrapped with a fiber bundle 232, the fiber bundle 232 is soft and has toughness, can buffer the lateral extrusion force of the soil layer in the inclined state, avoid deformation of the inner core pipe 231, the gap of the fiber bundle 232 can form a small water capsule, so that the water has enough time to penetrate into the deep soil, avoid the rapid loss of water along the surface of the water guide 23, ensure the long-term wetting of the deep root zone, induce the plant 10 root system to grow to the deep soil layer, enhance the slope 1 slope stabilization ability, and realize the multi-target cooperation of rainwater utilization, ecological restoration, and slope 1 reinforcement.

[0075] In some embodiments, to further improve the pertinence and controllability of rainwater collection, an intercepting filter screen 5 is also connected between the purification assemblies 2 of each row, the intercepting filter screen 5 is connected with the tire ring 21 to form a first rainwater treatment defense line extending transversely along the slope surface 4. The intercepting filter screen 5 can be made of aging-resistant and stretch-resistant nylon material or stainless steel woven mesh, which can efficiently block large impurities such as fallen leaves, gravel, and weeds in the runoff of the slope surface 4. The intercepting filter screen 5 can be detachably connected to the top edge of the tire ring 21 by a wire or a bandage. This connection structure not only is convenient to install, but also can be quickly disassembled, replaced, and cleaned when the filter screen is damaged or impurities are accumulated, thereby greatly reducing the later maintenance cost.

[0076] In order to realize the dynamic balance of rainwater collection and flood discharge, a water blocking plate 3 in inverted V shape is arranged between adjacent tire rings 21, and the water blocking plate 3 can be made of acrylic plate; an elastic member is connected between the intercepting filter screen 5 and the water blocking plate 3, and in the initial state, the elastic force of the elastic member makes the inner side wall of the water blocking plate 3 tightly adhere to the outer wall of the tire ring 21. The elastic member is preferably made of stainless steel spring or high-elastic rubber rope, and in the initial state, the tension of the elastic member will pull the outer side wall of the water blocking plate 3 to tightly adhere to the outer wall of the tire ring 21, so that the adjacent tire rings 21, the water blocking plate 3 and the intercepting filter screen 5 together enclose a temporary water collecting space.

[0077] In the scheme, the inverted V-shaped water blocking plate 3 cooperates with the elastic member to automatically adjust according to the rainfall: in light rain, the tension of the elastic member makes the water blocking plate 3 closed, and the rainwater is forced to flow through the filler 24 to complete the filtration; in heavy rain or rainstorm, the water pressure overcomes the tension of the elastic member, the water blocking plate 3 automatically moves downward to realize rapid flood discharge, and the slope 4 is prevented from being soaked by accumulated water. After the rainfall ends, the water pressure disappears, and the elastic force of the elastic member will pull the water blocking plate 3 to automatically reset and re-adhere to the outer wall of the tire ring 21, thereby restoring the original state. Through this dynamic adjustment, different rainfall intensities are adapted, and rainwater purification and flood discharge safety are considered.

[0078] In some embodiments, in order to further optimize the installation stability of the intercepting filter screen 5, the following installation method can also be used: the tire ring 21 is provided with a slot 2113, the intercepting filter screen 5 is inserted into the slot 2113, and the filler 24 is filled between the intercepting filter screen 5 and the inner wall of the tire ring 21 to extrude and fix the intercepting filter screen 5. The double fixing mode of the slot 2113 positioning and the extrusion of the filler 24 makes the filter screen installation more firm, which can resist the impact of the slope 4 runoff without loosening or shifting; during installation, only the filter screen needs to be inserted and then the filler 24 is filled, and during disassembly, only part of the surface filler 24 needs to be dug out, so that the filter screen can be pulled out of the slot 2113 for replacement.

[0079] The embodiment also provides a construction method of the rainwater collection and purification unit, and the method comprises the following steps:

[0080] S1, site survey and slope 4 pretreatment:

[0081] The slope 1 gradient, soil type and slope foot terrain are surveyed to determine the layout position of the purification assembly 2 and the excavation range of the water collecting ditch 6 and the water collecting well 7; the slope 4 is cleaned of sundries, the raised and depressed areas are leveled, and the loose soil is tamped to ensure the overall stability of the slope 4.

[0082] S2, tire ring 21 installation and positioning:

[0083] The tire ring 21 is placed on the marked point with the tire side 212 facing down according to the design requirement; the positioning rib 22 is inserted into the soil through the tire side 212 to fix the tire ring 21, so that the tire ring 21 is firm and does not loosen.

[0084] S3, water guide 23 is installed and filler 24 is filled:

[0085] A hole is drilled at the position of slope 4 corresponding to the center hole of tire ring 21, water guide 23 is inserted, and the top end of water guide 23 is ensured to protrude from tire ring 21. Filler 24 is filled around water guide 23 inside tire ring 21 and is lightly tamped.

[0086] S4, installation of interception filter screen 5 and water blocking plate 3:

[0087] Inverted V-shaped water blocking plate 3 is installed between adjacent tire rings 21, and the both ends of elastic member are connected to interception filter screen 5 and water blocking plate 3, respectively. The tension of elastic member is adjusted to ensure that water blocking plate 3 is tightly attached to the outer wall of tire ring 21 in the initial state.

[0088] S5, construction of water collecting ditch 6 and water collecting well 7:

[0089] Water collecting ditch 6 and water collecting well 7 are excavated according to the range of slope foot line, and HDPE impermeable membrane is laid on the inner wall of water collecting ditch 6 and water collecting well 7. C15 concrete cushion is poured at the bottom of water collecting well 7 to prevent uneven settlement.

[0090] S6, vegetation planting on slope 4 to construct an ecological synergy system:

[0091] Deep-rooted plants 10 are planted or vegetation mats are laid in the blank area outside tire ring 21 on slope 4. Specifically, deep-rooted plants 10 such as Amorpha fruticosa and Cynodon are preferentially planted in the blank area on slope 4, or ecological vegetation mats containing grass seeds are laid. The vegetation mats are fixed with U-shaped nails, and the vegetation type needs to be adapted to the local climate and soil conditions. After planting, initial irrigation is performed once to ensure that the seedlings take root. Within the next month, irrigation is supplemented 2-3 times according to the soil moisture condition to promote the synergistic growth of vegetation and the unit system.

[0092] Example two:

[0093] It should be noted that in some embodiments, the inside of inner core tube 231 is also filled with a moisturizing layer, which includes straw and ceramsite mixed in a ratio of 1:2. This can avoid the compaction and clumping of pure straw, while leaving air permeation and infiltration channels. The straw is straw powder or straw segments that have been dried and sterilized. Coarse sand can also be used instead of ceramsite.

[0094] The straw in the moisturizing layer can play a dual role of active moisturizing and slow-release fertilizer function. The straw is porous and loose, and can quickly lock water after absorbing water, forming a double moisturizing system of straw locking water in the tube and fiber bundle 232 releasing water outside the tube. After being filled with water, the wet straw can slow down the water flow penetration speed in the inner core tube 231, avoiding rapid water loss. Even after the pump is stopped, the water absorbed by the straw can still be released to the deep soil through the penetration hole and fiber bundle 232, prolonging the water supply time for deep root systems, especially suitable for the moisturizing needs of the slope 1 in arid areas.

[0095] In addition, the straw is rich in cellulose, nitrogen, phosphorus, potassium and trace elements, and slowly releases nutrients during decomposition; the straw locks water in the early stage, and gradually turns into organic fertilizer in the later stage, continuously improving the deep soil fertility, promoting root growth and slope stabilization, without the need for additional chemical fertilizers, reducing maintenance costs in the later stage, and meeting the natural cycle concept of ecological restoration.

[0096] In this embodiment, the top end of the inner core tube 231 is detachably connected to a cap, such as a threaded connection or a snap connection; when the straw in the inner core tube 231 is decomposed by long-term use and loses its original moisture-locking and nutrient-providing ability, the overall structure of the water guide 23 does not need to be disassembled, only the top cap needs to be manually removed, the rotten straw residue can be quickly cleaned through the top opening of the inner core tube 231, and the mixed filler 24 of new straw and coarse sand treated by drying and sterilization can be refilled, which is convenient and efficient to replace.

[0097] On the other hand, the water guide 23 is set at an acute angle of 30-45 degrees, which can form a synergistic effect with the replacement of the moisturizing layer: the inclined angle makes the inner core tube 231 cavity form a natural flow slope, and when cleaning the rotten straw residue, the residue can slide along the inclined tube cavity to the top opening by gravity, without the need for additional effort to dig.

[0098] Embodiment three:

[0099] Continuing to refer to Figure 1 - Figure 7 The present embodiment proposes a water resource saving and recycling irrigation system, which includes the above-mentioned rainwater collection and purification unit; a water pump is arranged in the water collecting well 7, and the top of the inner core tube 231 is connected to the water pump through a water guide pipeline; the system further includes a controller, which is in control connection with the water pump.

[0100] The system further includes a plurality of soil sensors, which are arranged in the soil of the slope 4 in a grid shape and are arranged in layers along the soil depth; the soil sensors are in electrical connection with the controller, and are used to collect soil moisture data at different depths and different areas and transmit the data to the controller.

[0101] The controller is selected to be a PLC controller with data storage and wireless communication functions, and is installed in a protective box at the slope foot for easy maintenance.

[0102] The soil sensor selects a probe type sensor with the functions of collecting soil moisture and temperature, and is laid according to the principles of global coverage and layered sensing. In the soil body of the slope 4, points are arranged in a grid shape, and three layers of sensors are arranged in the soil depth direction at each arrangement point: a surface layer sensor for monitoring the soil moisture of the vegetation growth layer, a middle layer sensor for monitoring the soil moisture of the root active layer, and a deep layer sensor for monitoring the soil moisture of the deep root solid slope layer. All soil sensors are electrically connected to the controller through waterproof cables, can collect real-time soil moisture and temperature data at different depths and different regions, and transmit the data to the controller to provide accurate data support for irrigation decision-making.

[0103] The embodiment also provides a use method of the water resource saving and recycling irrigation system. Based on the water resource saving and recycling irrigation system, the method comprises the following steps:

[0104] a. Collect and purify during rainfall

[0105] After the rainwater falls on the slope 4, the large impurities are blocked by the interception screen 5 at the top of the tire ring 21, so that the first hole 2111 and the second hole 2112 of the tire ring 21 are not blocked by the runoff, and the subsequent water flow channel is ensured to be unobstructed.

[0106] The filtered rainwater enters the inside through the first hole 2111 at the upper part of the tire ring 21, is further filtered and purified through the filler 24, and the fine particles in the rainwater are removed through the physical interception and adsorption of the filler 24.

[0107] Part of the purified rainwater infiltrates the soil around the water guide 23, nourishes the shallow root system, and meets the daily basic water demand of the vegetation; the excess rainwater is quickly discharged through the second hole 2112 at the lower part of the tire ring 21, is collected into the water collecting well 7 through the water collecting ditch 6, and is stored for standby, so that the rainwater is efficiently stored.

[0108] When the rainfall is large, for example, when heavy rain or rainstorm is encountered, the runoff of the slope 4 increases suddenly, the rainwater is quickly stored in the temporary space enclosed by the adjacent tire ring 21 and the inverted V-shaped water stop plate 3, when the water pressure overcomes the tension of the elastic member, the water stop plate 3 automatically moves downward, and no longer sticks to the outer wall of the tire ring 21, so that the water is discharged quickly, and the slope 4 is prevented from being soaked.

[0109] b. Irrigation and recycling

[0110] The soil sensor collects the soil moisture data of different regions of the slope 4 in real time, and continuously transmits the data to the controller; the controller presets the soil moisture threshold at each depth, when the controller detects that the deep soil moisture is lower than the set threshold without rainfall, the water pump in the water collecting well 7 is automatically started, the collected rainwater is transported to the inner core pipe 231 of the water guide 23 through the water guide pipeline, and the rainwater is slowly infiltrated into the deep soil through the infiltration holes and the fiber bundle 232, so that the deep soil is supplemented with water; after the water content meets the standard, the controller automatically closes the water pump.

[0111] Wherein: the water diversion pipeline includes the main pipeline 8 and the branch pipeline 9 communicated with the main pipeline 8, the main pipeline 8 is longitudinally arranged along the slope surface 4, and the branch pipeline 9 is transversely arranged along the slope surface 4, and the branch pipeline 9 is communicated with the top end of the inner core pipe 231 through a hose.

[0112] The system is based on a rainwater collection and purification unit, and through the matching soil sensor, controller and other intelligent components, realizes the complete closed loop of efficient rainwater collection, synchronous purification, dynamic flood drainage and on-demand reuse, reduces engineering cost and environmental pollution through solid waste resource utilization such as waste tires, meets the water demand of deep root system of vegetation through intelligent regulation and control of soil sensor and controller, and strengthens the structural stability of the slope 1, and finally achieves multiple benefits of water-saving, environmental protection, ecological restoration and engineering safety.

[0113] It should be noted that in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and other terms indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore cannot be understood as a limitation on the present application.

[0114] In addition, it should be noted that in the description of the present application, unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0115] Although the specific embodiments of the application have been described above with reference to the drawings, it is not a limitation on the scope of protection of the present application, and various modifications or variations made by those skilled in the art on the basis of the technical solutions of the present application without creative labor are still within the scope of protection of the present application.

Claims

1. A rainwater collection and purification unit, characterized in that, The application relates to a rainwater collecting and purifying unit, which comprises a plurality of groups of purifying assemblies (2) arranged on a slope surface (4) of a slope (1), wherein the purifying assembly (2) comprises a tire ring (21) formed by splitting a waste tire along a center line, the tire side (212) of the tire ring (21) is downwardly attached to the slope surface (4), a plurality of positioning ribs (22) are arranged on the tire side (212) in a circumferential direction, and the positioning ribs (22) are inserted into the soil of the slope surface (4) to fix the tire ring (21). The tire ring (21) forms an annular cavity, a center hole is arranged in a central region of the tire ring (21), at least one water guide (23) is arranged in a corresponding region of the center hole of the slope surface (4), the bottom end of the water guide (23) is inserted into deep soil of the slope surface (4), and the top end of the water guide (23) extends to above the tire ring (21) through the center hole. The water guide (23) comprises an inner core pipe (231), the inner core pipe (231) is provided with a penetrating hole, and a fiber bundle (232) is wound on the outer wall of the inner core pipe (231). The annular cavity of the tire ring (21) and the periphery of the water guide (23) are filled with a filler (24) for filtering and purifying rainwater entering the cavity. A plurality of first holes (2111) are arranged on the upper tire surface (211) of the tire ring (21), and a plurality of second holes (2112) are arranged on the lower tire surface (211), wherein the diameter of the first holes (2111) is smaller than that of the second holes (2112). A plurality of groups of the purifying assemblies (2) are arranged in multiple rows along the contour lines of the slope surface (4) in a spaced mode, the purifying assemblies (2) in adjacent rows are arranged in a staggered mode, an intercepting screen (5) is further arranged between the purifying assemblies (2) in each row, the intercepting screen (5) is connected with the tire ring (21), a water blocking plate (3) in an inverted V shape is arranged between adjacent tire rings (21), an elastic member is arranged between the intercepting screen (5) and the water blocking plate (3), and the elastic force of the elastic member makes the inner side wall of the water blocking plate (3) tightly contact with the outer wall of the tire ring (21) in an initial state. A water collecting ditch (6) is arranged at the slope foot of the slope (1), and a water collecting well (7) is arranged in communication with one side of the water collecting ditch (6).

2. The rainwater collection and purification unit of claim 1, wherein, The water guide (23) and the slope surface (4) form an acute angle of 30-45 degrees.

3. The rainwater collection and purification unit of claim 1, wherein, The intercepting screen (5) is detachably connected to the top edge of the tire ring (21) through iron wires or a bandage.

4. The rainwater collection and purification unit of claim 1, wherein, The tire ring (21) is provided with a notch (2113), the intercepting screen (5) is inserted into the notch (2113), and the filler (24) is filled between the intercepting screen (5) and the inner wall of the tire ring (21) to press and fix the intercepting screen (5).

5. Construction method of a rainwater collection and purification unit, characterized in that, The rainwater collecting and purifying unit is used in the method according to any one of claims 1-4, and the method comprises the following steps: S1, on-site survey and slope surface (4) pretreatment: surveying the slope (1) gradient, soil type and slope foot terrain, determining the layout position of the purifying assembly (2) and the excavation range of the water collecting ditch (6) and the water collecting well (7), cleaning the slope surface (4), leveling the convex and concave regions, tamping the loose soil and ensuring the overall stability of the slope surface (4); S2, tire ring (21) installation and positioning: ​ According to the design requirements, the tire ring (21) is placed on the marked point with the tire side (212) downward; the positioning rib (22) is inserted into the soil through the tire side (212) to fix the tire ring (21) and ensure that it is not loose; S3, the water guide part (23) is installed and the filler (24) is filled: A hole is drilled at the position of the slope (4) corresponding to the center hole of the tire ring (21), the water guide part (23) is inserted, and the top end of the water guide part (23) is ensured to protrude from the tire ring (21); the filler (24) is filled around the water guide part (23) in the interior of the tire ring (21) and is lightly tamped; S4, the interception filter screen (5) and the water blocking plate (3) are installed: The inverted V-shaped water blocking plate (3) is installed between the adjacent tire rings (21), the both ends of the elastic member are connected with the interception filter screen (5) and the water blocking plate (3) respectively, the tension of the elastic member is adjusted, and it is ensured that the water blocking plate (3) is tightly attached to the outer wall of the tire ring (21) in the initial state; S5, the water collecting ditch (6) and the water collecting well (7) are constructed: The water collecting ditch (6) and the water collecting well (7) are excavated according to the range of the slope toe wire, and the inner wall of the water collecting ditch (6) and the water collecting well (7) is paved with HDPE impermeable membrane; S6, the slope (4) is planted with vegetation: Deep-rooted plants (10) are planted or vegetation blankets are laid in the blank area of the slope (4) except the tire ring (21).

6. A water resource conservation and reclamation irrigation system characterized by, The rainwater collecting and purifying unit of any one of claims 1-4; a water pump is arranged in the water collecting well (7), the top of the inner core pipe (231) is connected with the water pump through a water guide pipeline; and a controller is further included, which is in control connection with the water pump.

7. The water resource conservation and reuse irrigation system of claim 6, wherein, A plurality of soil sensors are further included, which are arranged in the soil of the slope (4) in a grid shape and are arranged in layers along the soil depth; The soil sensors are in electrical connection with the controller, and are used to collect soil moisture data of different depths and different areas and transmit the data to the controller.

8. A method of using a water resource conservation and reuse irrigation system, characterized in that, The water resource saving and recycling irrigation system based on any one of claims 6-7 comprises the following method: a. Collecting and purifying during rainfall: After the rain falls on the slope (4), large impurities are first blocked by the interception filter screen (5) on the top of the tire ring (21); The filtered rainwater enters the interior through the first hole (2111) on the upper part of the tire ring (21), is further filtered and purified by the filler (24), and small particles in the rainwater are removed; Part of the purified rainwater infiltrates the soil around the water guide part (23) to nourish the shallow root system; the excess rainwater is quickly discharged through the second hole (2112) on the lower part of the tire ring (21) and is collected into the water collecting well (7) for storage through the water collecting ditch (6); When the rainfall is larger, the rainwater is stored between the water blocking plate (3) and the tire ring (21), the pressure overcomes the tension of the elastic member, the water blocking plate (3) automatically moves downward, the drainage is accelerated, and the slope (4) is prevented from being soaked; b. Irrigation and recycling: The soil sensor collects the soil moisture data of different areas of the slope (4) in real time and continuously transmits the data to the controller; when the controller detects that the deep soil moisture is lower than the set threshold without rainfall, the water pump in the water collecting well (7) is automatically started, the collected rainwater is transported to the inner core pipe (231) of the water guide (23) through the water guide pipeline, slowly penetrates into the deep soil through the penetration hole and the fiber bundle (232), and deep water replenishment is realized; after the water content reaches the standard, the controller automatically closes the water pump.

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