Photovoltaic device for treating heavy metal soil pollution and application method thereof

Abstract

The invention discloses a photovoltaic device for treating heavy metal soil pollution and an application method thereof, comprising a slope, wherein a solar array and a vegetation array are sequentially arranged on the slope surface of the slope, wherein the solar array is located above the vegetation array, and the solar array and the vegetation array are separated by a horizontally arranged pedestrian and horse path; the solar array comprises a plurality of evenly arranged solar panels, each of which is detachably fixedly matched with the slope through a hollow anchor rod, wherein a lifting anchor is arranged in the hollow anchor rod, and the hollow anchor rod is detachably fixedly matched with the slope through the lifting anchor rod, and the lifting anchor of the solar array is energizedly matched with the solar panel; the vegetation array comprises a plurality of evenly arranged vegetation boxes, and the vegetation boxes are detachably fixedly matched with the slope surface of the slope through anchoring thorns, so as to repair the soil, absorb heavy metals, save energy and protect the environment, and stabilize the slope.

Description

Technical Field

[0001] The invention relates to the technical field of bank slope restoration, in particular to a photovoltaic device for treating heavy metal soil pollution and an application method thereof. Background Art

[0002] The defects of the existing ecological slope protection structure are:

[0003] 1. Comparative document CN217870533U discloses a new type of ecological slope protection for soil and water conservation design in mining spoil dumps. The protected claims include "ecological slope, cement cast edge protection, sand protection frame assembly and planting trough. The utility model sets a sand protection frame assembly on the top of the ecological slope, and forms a mesh planting trough by splicing fixed frames. The consolidation effect of sand and soil is increased by splicing fixed frames, and a connecting assembly is set. The splicing fixed frames are fixedly connected by the connecting assembly, which is convenient for quick connection and fixation of the splicing fixed frames, and the sand protection frame assembly is convenient for splicing and fixing. The fixing operation is simple and the fixing and stabilizing effect is good. The splicing fixed frames are used to increase the consolidation effect of vegetation and soil, thereby increasing the stabilization effect of the ecological slope protection." However, its structure does not effectively deal with the problem of heavy metal pollution that may exist on the slopes of mining areas, and lacks automatic irrigation function.

[0004] 2. Comparative document CN216405446U discloses an ecological slope protection system for an open-pit mine dump, and the protected items include "a chemical barrier layer, a physical barrier layer and a plant slope protection layer from the inside to the outside, the plant slope protection layer includes a first tree and shrub restoration area, a vine restoration area and a second tree and shrub restoration area arranged in sequence from top to bottom, the first tree and shrub restoration area includes a planting soil layer and trees, shrubs and green manure crops planted on the planting soil layer; the second tree and shrub restoration area includes a valley floodway, a planting soil layer and trees, shrubs and green manure crops planted on the planting soil layer The vine restoration area includes a slope area, a step area and a retaining wall. The retaining wall is located between the lowest step area and the second tree and shrub restoration area. A planting trough is provided on the planting soil layer in the step area, and a slope foot guard is provided next to the planting trough. The utility model solves the current problem of high cost and poor effect of slope protection in open-pit mine spoil dumps in semi-arid and arid areas. "However, the method and process are relatively cumbersome, the time cost is also high, and the structure lacks automatic irrigation function. The uncertainty of replenishing water only through rainfall is high, so an automatic irrigation structure is required.

[0005] 3. Comparative document CN116950095A discloses a highway photovoltaic slope protection structure and construction method based on cement blanket. The protected claims include "After the construction of the photovoltaic panel support pile foundation column, the method lays the cement blanket on the highway photovoltaic slope, wedges it into the soil with soil nails on all sides to fix it, and adheres the adjacent edge joints with mortar or adhesive, presses the mortar edge, and then sprinkles water on the surface of the cement blanket to harden it, which can quickly form a hard, soilless and firm slope protection structure, and digs drainage ditches at the foot of the highway photovoltaic slope, so as to achieve the purpose of no longer growing vegetation on the photovoltaic slope, eliminating fire hazards and the adverse effects of vegetation on the operation and maintenance of photovoltaic power stations, smooth drainage of rainwater, stable slopes, convenient construction and cost savings." However, its photovoltaic panels lack automatic cleaning devices, and its photovoltaic efficiency may decrease after a long time.

[0006] Traditional methods for slope management in open-pit mining include slope shaping, slope protection, slope drainage, hydraulic seeding, net seeding, etc. However, these methods have more or less problems such as high engineering cost, large engineering volume, long construction period, poor ecological restoration quality, weak anti-scouring effect, and inability to provide stable water supply for plants on the slope. At the same time, it is also difficult to manage salinization and heavy metal pollution in some areas, which restricts the diversity of ecological restoration. Therefore, it is urgent to invent a photovoltaic device for managing heavy metal soil pollution and its application method to solve the above problems. Summary of the invention

[0007] The present invention provides a photovoltaic device for treating heavy metal soil pollution and its application method, aiming to solve the problems of the above-mentioned existing open-pit mining slope treatment methods, such as high engineering cost, large engineering volume, long construction period, poor ecological restoration quality, weak anti-scouring effect, and inability to provide stable water supply for plants on the slope. At the same time, it is difficult to treat salinization and heavy metal pollution in some areas, which restricts the diversity of ecological restoration.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0009] A photovoltaic device for treating heavy metal soil pollution comprises a slope, on the slope surface of which a solar array and a vegetation array are arranged in sequence, wherein the solar array is located above the vegetation array, and the solar array and the vegetation array are separated by a horizontally arranged pedestrian and horse path;

[0010] The solar array includes a plurality of evenly arranged solar panels, each of which is detachably fixedly matched with the slope through a hollow anchor rod, a lifting anchor is provided inside the hollow anchor rod, the hollow anchor rod is detachably fixedly matched with the slope through the lifting anchor, and the lifting anchor of the solar array is electrically matched with the solar panel;

[0011] The vegetation array comprises a plurality of evenly arranged vegetation boxes, and the vegetation boxes are all detachably fixedly matched with the slope surface of the slope through anchoring thorns.

[0012] Preferably, a cement blanket is provided on the slope, and a water accumulation area is provided at the bottom of the slope. The water accumulation area forms a traction cooperation with the water pump in the equipment room located at the top of the slope through a pump pipe. The drain outlet of the water pump in the equipment room is connected to the water storage area at the top of the slope. The water outlet of the water storage area is connected to several groups of PVC drainage pipes, and each group of PVC drainage pipes flows downward along the slope through the solar panels of the solar array and the vegetation boxes of the vegetation array in turn.

[0013] As a more preferred embodiment, two solar panels adjacent to each other in the horizontal direction form a pair, and each pair of solar panels is arranged at equal intervals on the slope, and the corresponding PVC drainage pipes pass through the same pair of solar panels, and a hydraulic sweeper is provided on the same pair of solar panels, and the hydraulic sweeper forms a linkage with the water passing through the corresponding PVC drainage pipe;

[0014] Each solar panel is parallel to the slope, and a support is provided in the middle of the bottom of the solar panel. The support forms a detachable fixed fit with the top of the corresponding hollow anchor rod. An ash collector is provided at the bottom of the solar panel, and the hydraulic sweeper collects the ash on the solar panel into the ash collector.

[0015] Furthermore, the hydraulic sweeper is fixed on the corresponding PVC drainage pipe, and the top of the hydraulic sweeper is connected to the PVC drainage pipe through a water diversion pipe, and a water blocking valve is provided on the water diversion pipe;

[0016] A water collecting box is movably provided in the hydraulic sweeper, and the water collecting box cooperates with the hydraulic sweeper to form a piston structure. The bottom of the water collecting box forms an elastic cooperation with the bottom of the inner wall of the hydraulic sweeper through a first spring. A fixed pulley is provided on the top of the hydraulic sweeper. The top of the water collecting box forms a fixed pulley linkage cooperation with the movable pulley through a first pulling rope and the fixed pulley. A fixed plate is provided on the PVC drainage pipe at the bottom of the hydraulic sweeper. The top of the fixed plate forms a movable pulley linkage cooperation with a cleaning soft brush through a second pulling rope and the movable pulley. The cleaning soft brush brushes along the surface of the solar panel under the linkage cooperation of the movable pulley.

[0017] The upper and lower parts of the hydraulic sweeper are respectively provided with limiters, and the limiters are symmetrically arranged with respect to the middle position of the hydraulic sweeper, and the water collecting box and the limiters form a releasable limit fit.

[0018] Furthermore, a drain port is provided under the lower limiter of the hydraulic sweeper, and the hydraulic sweeper is connected to the PVC drainage pipe through the drain port, a protruding opening for receiving flowing water is provided on the top of the water collecting box, and a drain valve is provided on one side of the bottom of the water collecting box;

[0019] When the drain valve does not overlap with the drain port, the drain valve is closed by the limit of the inner wall of the hydraulic sweeper, and the water collecting box is not connected with the drain port;

[0020] When the drain valve coincides with the drain port, the drain valve opens under the action of the gravity of the flowing water, and the water collecting box is connected with the drain port and forms a water diversion coordination with the PVC drainage pipe through the drain port.

[0021] Specifically, the stopper is movably embedded in the inner wall of the hydraulic sweeper, and the bottom of the stopper forms an elastic fit with the inner wall of the hydraulic sweeper through a second spring;

[0022] The limiter includes a sliding block, the bottom of the sliding block is connected to the second spring, the top of the sliding block is provided with a rotating groove, a single torsion spring is provided on one side of the top of the rotating groove, and the top side of the rotating groove forms an elastic hinged fit with the rotating block through the single torsion spring, and the rotating block can be rotated around the single torsion spring and embedded in the rotating groove;

[0023] In the initial state, the single torsion spring is in an energy release state, the rotating block stands upright directly above the rotating groove, and the rotating block is exposed from the inner wall of the hydraulic sweeper. The rotating block of the lower limiter rotates around the single torsion spring toward the bottom of the slope, and the rotating block of the upper limiter rotates around the single torsion spring toward the top of the slope.

[0024] Preferably, the hollow anchor comprises an anchor barrel, an anchor tip is provided at the bottom of the anchor barrel, a mounting groove is provided in the anchor barrel near the anchor tip, a lifting anchor is embedded in the anchor barrel, and the bottom end of the lifting anchor forms a snap fit with the mounting groove, a side wall of the anchor barrel is provided with a reserved opening, and the top of each reserved opening is provided with an inverted L-shaped slot;

[0025] An outer limiting ring and a mounting hole are provided on the top of the anchor rod cylinder. The anchor rod cylinder forms a limiting fit with the slope surface of the slope through the outer limiting ring and the fasteners, and the solar panel forms a detachable fixed fit with the mounting hole through the support.

[0026] As a more preferred embodiment, the lifting type anchoring piece comprises a push rod with a hollow interior, an openable anchoring tip is provided at the bottom of the push rod, a rolling shaft that can slide along the push rod is provided at the bottom of the push rod, the anchoring tip passes through the push rod and is hinged with the rolling shaft, a lifting rope is provided inside the push rod, the lifting rope passes through the push rod and is connected with the rolling shaft to form a linkage match, an electric circuit is provided on the lifting rope, and the anchoring tip forms an electric match with the power supply end of the solar panel assembly through the electric circuit;

[0027] When not anchored, the anchoring part of the pull-type anchor is folded and embedded in the reserved opening and forms a limiting fit with the inverted L-shaped slot;

[0028] During anchoring, the pulling rope drives the rolling shaft, the anchor tip opens and penetrates into the slope from the reserved opening, and forms a limiting fit with the inverted L-shaped slot.

[0029] Furthermore, adjacent planting boxes arranged along the slope are fitted with each other in a limited position by anchoring thorns;

[0030] The anchoring thorns include inner thorns arranged at the bottom of the bottom surface of the planting box and outer thorns arranged at the top of the bottom surface of the planting box. The inner thorns of adjacent planting boxes arranged along the slope are embedded in the outer thorns to form a limited fit, and the outer thorns of the planting box are embedded in the slope.

[0031] An annular water supply box is arranged around the outer side of the planting box. The annular water supply box is connected with the PVC drainage pipe through a water supply pipe, and the annular water supply box is connected with the inside of the planting box through a water-absorbing cotton strip.

[0032] An application method of a photovoltaic device for treating heavy metal soil pollution, a method for repairing an open-pit mining slope using the photovoltaic device for treating heavy metal soil pollution, the steps comprising:

[0033] Step 1: Dig out a water storage area 3 to 4 meters inward from the outer edge of the top of the slope, and organize the equipment room. Place a water pump, ventilation device, reverse osmosis desalination device, battery pack and build a purification pool in the equipment room;

[0034] Step 2: Clean the slope, reserve a 1.5-meter-wide horse-passageway from the top of the slope to 1 / 3 of the slope, reserve a drainage ditch in the middle of the horse-passageway, and level the slope. Add additives, biochar and microorganisms to the cleaned loose soil to make it suitable for plant growth. Divide the improved soil into two batches, one batch is loose soil, and the other batch is evenly mixed with plant seeds and put into vegetation bags for subsequent use;

[0035] Step 3: Lay a cement blanket 2 meters from the outer edge of the top of the slope to cover the slope and the non-pedestrian path and fit the inner wall of the drainage ditch. Fix the upper and lower ends of the cement blanket with soil nails. Drive hollow anchor rods at predetermined points along the slope from top to bottom. Stop driving when the outer limit ring of the hollow anchor rod is close to the cement blanket to make the exposed length of the hollow anchor rod uniform. Install the hollow anchor rods in this way until they cover the slope above the non-pedestrian path.

[0036] Step 4: Lay the PVC drainage pipe from the top of the slope to the foot of the slope, passing it between two adjacent hollow anchor rods in the horizontal direction, press the PVC drainage pipe so that its lower part fits the slope surface, and use pipe clips to fix the PVC drainage pipe to the cement blanket and the slope surface; install a pump pipe in the same way and fix it on the slope surface;

[0037] Step 5: Install the annular water supply box after the hole is turned on the outside of the open vegetation box, and use a water-absorbing cotton strip to pass through the hole and extend into the vegetation box. In the area where the cement blanket is not laid on the slope below the pedestrian and horse path, squeeze the anchor thorns of the vegetation box into the slope, and install it from bottom to top along the slope surface, so that the outer thorns at the rear of the vegetation box are all inserted into the slope to form a vegetation array, and the inner thorns in front of the vegetation box are inserted into the outer thorns of the previous adjacent vegetation box to form a limit fit, so that it is fixed on both sides of the PVC drainage pipe, and the water supply pipe on the annular water supply box is connected to the PVC drainage pipe, and some biochar particles are sprinkled on the bottom of the vegetation box. Then, use the improved soil prepared in step 1 to fill the open vegetation box in the way of capping the lower vegetation bag with loose soil, and fill the gaps between the vegetation bags with bulk soil;

[0038] Step 6: Place the lifting anchor into the hollow anchor rod and rotate it so that the lifting anchor rod is stuck in the inverted L-shaped slot. Pull the lifting rope on the top of the lifting anchor rod outward to make the anchoring tip of the lifting anchor rod pass through the reserved opening of the hollow anchor rod and insert into the slope. Pre-install solar panels on the hollow anchor rods in the cement blanket laying area to form a solar array. Install dust collectors at the bottom of the solar panels. Divide the power output line of each solar panel into two ends, and connect the power supply line of the lifting anchor rod and the battery pack on the top of the slope respectively. Then place the support sleeve under the solar panel on the outer limit ring of the hollow anchor rod and fix it with bolts to the installation hole. Install the hydraulic sweeper on the PVC drainage pipe and adjust the cleaning soft brush of the hydraulic sweeper to fit the solar panel.

[0039] Step 7: Use the generator to power the battery pack at the top of the slope, so that the equipment room starts to operate. The water pumping device pumps the water from the water accumulation area at the bottom of the slope to the purification pool at the top of the slope, and is treated by the reverse osmosis desalination device. The desalinated water flows into the water storage area. When the water storage is sufficient, the water in the water storage area is used to irrigate and maintain the cement blanket, and the excess water flows into the drainage ditch for discharge;

[0040] Step 8: Remove the generator, and rely on the solar panel to power the battery pack during the day. When the power reserve is sufficient, the equipment room starts to operate. The water pumping device pumps the water from the water accumulation area at the bottom of the slope to the purification pool at the top of the slope. The reverse osmosis desalination device desalinates the water and replenishes the desalinated water to the water storage area. At night, the water in the water storage area is discharged through the PVC drainage pipe. During the discharge process, the clean soft brush of the hydraulic sweeper reciprocates over the solar panel, and part of the discharged water is replenished in the annular water supply box for seed germination and growth, completing the construction;

[0041] Step 9: When the PVC drainage pipe is not drained, the water collecting box is located at the predetermined water replenishment position under the support of the spring. At this time, the protruding opening contacts the water blocking valve, and the water blocking valve is opened to allow water to flow through. When the PVC drainage pipe is drained, water flows into the water collecting box through the water diversion pipe. When the water collecting box is sufficiently replenished with water, it begins to slide down obliquely under the action of gravity. In this process, the protruding opening gradually separates from the water blocking valve, and the water blocking valve automatically closes under the impact of the water flow and the action of its own weight, stopping the water flow from passing through;

[0042] Step 10: When the water collecting box slides down from top to bottom, it first contacts the upper stopper. At this time, the sliding direction of the water collecting box cannot make the rotating block rotate. The water collecting box can only pass through when the stopper is flush with the inner surface by squeezing the rotating block and the sliding block to move into the inner wall of the hydraulic sweeper and compressing the spring; when the water collecting box contacts the lower stopper, the sliding direction can make the rotating block rotate and be stored in the rotating groove of the sliding block. At this time, the stopper is flush with the inner surface and the water collecting box can pass through easily; when the water collecting box slides down to the drain port, the drain valve loses the support of the inner wall and opens under the action of the gravity of the water, and the water in the water collecting box flows back to the PVC drainage pipe;

[0043] Step 11: When the water in the water collecting box is drained, the elastic force of the spring is greater than the resistance of the limiter and the weight of the water collecting box, and the water collecting box rises from bottom to top, and the drain valve gradually fits against the inner wall and closes; in this process, the water collecting box first contacts the limiter below, because the sliding direction cannot make the rotating block rotate, and the water collecting box can pass only when the limiter is flush with the inner surface by squeezing the rotating block and the sliding block to move inward and compressing the spring; when the water collecting box contacts the limiter above, the sliding direction can make the rotating block rotate and be retracted into the sliding block. At this time, the limiter is flush with the inner surface, and the water collecting box can pass easily until it rises to the predetermined water replenishment position and stops.

[0044] Beneficial effects of the present invention:

[0045] 1. The limiter in the hydraulic sweeper of the present invention can ensure the running stroke of the water collection box. The water in the water collection box can pass through the limiter only when it is filled or emptied, thereby driving the cleaning soft brush to run stably; when the PVC drainage pipe is draining, the cleaning soft brush can make a reciprocating motion on the solar panel to clean the floating dust on the solar panel, thereby ensuring the normal power generation efficiency of the solar panel and thus ensuring the operation of the entire equipment. In addition, this equipment does not require manual regular maintenance, which can effectively reduce the cost of solar power generation;

[0046] 2. The combination of the hollow anchor rod and the lifting anchor piece of the present invention has the following effects: when the hollow anchor rod is driven into the slope, it can pass through the cement blanket to make it fit more closely with the slope surface; when the hollow anchor rod and the lifting anchor piece are in the slope, they can provide additional anchoring effect for the slope and increase the pull-out resistance of the hollow anchor rod, making the slope and the anchor rod body more stable; after the lifting anchor piece is powered by the solar panel, the two anchoring tips of the lifting anchor piece are energized in the slope, which can make the heavy metals gather to the two anchoring tips, so as to achieve the effect of controlling the heavy metal ions in the slope and reduce the pollution caused by the heavy metal ions in the slope spreading everywhere;

[0047] 3. The whole process of pumping and draining water in the present invention has the following effects: the salt in the water is removed, and the tendency of water salinization can be weakened under long-term treatment; the drainage process is carried out at night without interfering with the normal operation of the solar panel, and the gravitational potential energy of the water is used as a power source to drive the hydraulic sweeper to clean the floating dust on the solar panel, thereby ensuring the subsequent power generation efficiency of the solar panel; at the same time, part of the water is added to the annular water supply box, which can provide stable moisture for the germination of seeds and the growth of plants, thereby improving the efficiency of ecological restoration; the remaining water returns to the water accumulation area at the bottom of the slope, neutralizes and reduces the salinity of the water accumulation area at the bottom of the slope, and reduces the waste of water resources;

[0048] 4. The design of laying cement blanket under the solar panel of the present invention has the following effects: the cement blanket after watering and hardening can improve the stability of the slope and the construction is convenient and efficient; it can effectively isolate possible plants from climbing and causing the power generation efficiency of the solar panel to decrease; no intercepting ditch is dug on the top of the slope, so that the water on the top of the slope can directly flush through the cement blanket, which can flush away the dust collected and dumped by the dust collector on the solar panel, avoiding the dust from flying around and causing secondary pollution to the solar panel, and the sewage after flushing is discharged from the drainage ditch on the horse road;

[0049] 5. The open vegetation box of the present invention is made of straw board material, which is environmentally friendly, low-cost, easy to process, and can be used as a slope organic matter supplement after long-term use. The matching annular water supply box only needs one side to contact the PVC drainage pipe to achieve uniform water supply of the open vegetation box, avoiding the problem of uneven water supply that may occur in unilateral water supply; the upper and lower adjacent anchor thorn sleeves of the open vegetation box are placed together, so that the upper and lower adjacent open vegetation boxes can be connected into a whole, increasing the overall stability; the filling method of the open vegetation box with bulk soil at the bottom and bagged soil at the top can also effectively reduce soil erosion, and the addition of additives, biochar and microorganisms to the soil can improve soil fertility, and has the ability to adsorb heavy metal ions, which not only reduces the heavy metal pollution in the soil of the mining area, but also allows plants to have a better growth environment, which is conducive to the rapid restoration of the ecology;

[0050] 6. When repairing the slope of the open-pit mining site, the present invention effectively utilizes the excellent light resources on the upper part of the slope and the water resources in the water accumulation area at the bottom of the slope, and adopts a photovoltaic area and an ecological restoration area zoning mode on the slope. The two complement each other to make the ecological restoration effect more excellent; at the same time, certain improvements are made to the construction process, and in-situ resources are used in the preparation of improved soil and cement blanket watering and maintenance, which reduces the required manpower and material costs. At the same time, it only needs to install the components in sequence according to the steps to quickly, efficiently and permanently achieve slope reinforcement, pollution control and ecological restoration. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a three-dimensional schematic diagram of the arrangement of the present invention on a slope;

[0052] Figure 2 is a cross-sectional schematic diagram of the hollow anchor rod of the present invention;

[0053] Figure 3 It is a front view of the hollow anchor rod and the lifting type anchor member of the present invention;

[0054] Figure 4 It is a schematic diagram of the installation of the solar panel and the hydraulic sweeper of the present invention;

[0055] Figure 5 It is a three-dimensional schematic diagram of the hydraulic sweeper of the present invention;

[0056] Figure 6 It is a side cross-sectional schematic diagram of the water collecting box of the present invention when it is lowered;

[0057] Figure 7 It is a side cross-sectional schematic diagram of the water collecting box of the present invention when it is raised;

[0058] Figure 8 It is a detailed enlarged schematic diagram of the hydraulic sweeper of the present invention;

[0059] Fig. 9 It is a schematic diagram of the limiter of the present invention and its different operating states;

[0060] Fig.10 This is a schematic diagram of the installation of the plant box of the present invention;

[0061] Fig.11 This is an enlarged schematic diagram of the installation of the anchoring thorn of the present invention;

[0062] Fig.12 It is a top view schematic diagram of the planting box of the present invention;

[0063] In the figure: 1. Slope; 1.1. Cement blanket; 1.2. PVC drainage pipe; 1.3. Equipment room; 1.4. Water storage area; 1.5. Crosswalk; 1.6. Drainage ditch; 1.7. Pump pipe; 1.8. Water accumulation area;

[0064] 2. Hollow anchor rod; 2.1. Anchor rod cylinder; 2.2. Anchor rod tip; 2.3. Inverted L-shaped slot; 2.4. Reserved opening; 2.5. Outer limit ring; 2.6. Installation slot;

[0065] 3. Pull-type anchor; 3.1. Pull rope; 3.2. Power line; 3.3. Push rod; 3.3.1. Symmetrical orifice; 3.4. Rolling shaft; 3.5. Anchor tip;

[0066] 4. Solar panel; 4.1. Support; 4.2. Dust collector;

[0067] 5. Hydraulic cleaning machine; 5.1. Water diversion pipe; 5.1.1. Water blocking valve; 5.1.2. Fixed plate;

[0068] 5.2, water collection box; 5.2.1, protruding opening; 5.2.2, drain valve;

[0069] 5.3, first spring;

[0070] 5.4, ​​stopper; 5.4.1, second spring; 5.4.2, sliding block; 5.4.3, single torsion spring; 5.4.4, rotating block; 5.4.5, rotating slot;

[0071] 5.5, fixed pulley; 5.6.1, first pulling rope; 5.6.2, second pulling rope; 5.7, movable pulley; 5.8, cleaning soft brush; 5.9, drain port;

[0072] 6. Planting box; 6.1. Annular water supply box; 6.2. Anchoring thorns; 6.2.1. Inner thorns; 6.2.2. Outer thorns; 6.3. Water supply pipe; 6.4. Water-absorbing cotton strips. DETAILED DESCRIPTION

[0073] As follows, embodiments are further described with reference to the accompanying drawings.

[0074] like Figure 1 to Figure 12 As shown, as a preferred embodiment 1, a photovoltaic device for treating heavy metal soil pollution includes a slope 1, characterized in that a solar array and a vegetation array are sequentially arranged on the slope surface of the slope 1, the solar array is located above the vegetation array, and the solar array and the vegetation array are separated by a horizontally arranged pedestrian and horse path 1.5;

[0075] The solar array includes a number of evenly arranged solar panels 4, each of which is detachably fixedly matched with the slope 1 through a hollow anchor rod 2. A lifting anchor 3 is provided in the hollow anchor rod 2. The hollow anchor rod 2 is detachably fixedly matched with the slope 1 through the lifting anchor 3. The lifting anchor 3 of the solar array is electrically matched with the solar panel 4. The lifting anchor 3 is powered by the electricity generated by solar power generation, so that the heavy metals in the slope of the mining area are enriched by the electrodynamic method in the slope 1 to repair the soil.

[0076] The vegetation array includes a number of evenly arranged vegetation boxes 6, which are all detachably fixed with the slope surface of the slope body 1 through anchoring spikes 6.2, in order to repair the soil on the one hand and consolidate the stability of the slope on the other hand, take protective measures to prevent soil erosion.

[0077] As a preferred embodiment 2, a cement blanket 1.1 is provided on the slope 1, and a water accumulation area 1.8 is provided at the bottom of the slope 1. The water accumulation area 1.8 forms a traction cooperation with the water pump in the equipment room 1.3 located at the top of the slope 1 through a pump pipe 1.7. The drain outlet of the water pump in the equipment room 1.3 is connected to the water storage area 1.4 located at the top of the slope 1. The water outlet of the water storage area 1.4 is connected to a plurality of groups of PVC drainage pipes 1.2, and each group of PVC drainage pipes 1.2 flows downward along the slope through the solar panels 4 of the solar array and the vegetation boxes 6 of the vegetation array in turn to ensure water supply.

[0078] As a preferred embodiment 3, two solar panels 4 adjacent to each other in the horizontal direction form a pair, and each pair of solar panels 4 is arranged at equal intervals on the slope surface, and the corresponding PVC drainage pipes 1.2 pass through the same pair of solar panels 4, and a hydraulic sweeper 5 is provided on the same pair of solar panels 4, and the hydraulic sweeper 5 forms a linkage with the water passing through the corresponding PVC drainage pipe 1.2;

[0079] Each solar panel 4 is parallel to the slope, and a support 4.1 is provided at the middle of the bottom of the solar panel 4. The support 4.1 forms a detachable fixed fit with the top of the corresponding hollow anchor rod 2. An ash collector 4.2 is provided at the bottom of the solar panel 4. The hydraulic sweeper 5 collects the ash on the solar panel 4 into the ash collector 4.2.

[0080] A support 4.1 is provided under the solar panel 4, which can be placed on the outer limiting ring 2.5 and fixed to the hollow anchor rod 2. A dust collector 4.2 can be installed at the bottom of the solar panel 4. The dust collector 4.2 can collect dust brushed by the cleaning soft brush 5.8. When it rains, the bottom baffle of the dust collector 4.2 opens, and the collected dust falls onto the cement blanket 1.1 and is washed clean by the water flow.

[0081] The solar panel 4 includes power generation components such as a solar photovoltaic power generation panel and a dedicated controller for solar power generation, which are existing technologies.

[0082] As a preferred embodiment 4, the hydraulic sweeper 5 is fixed on the corresponding PVC drainage pipe 1.2, and the top of the hydraulic sweeper 5 is connected to the PVC drainage pipe 1.2 through a water diversion pipe 5.1, and a water blocking valve 5.1.1 is provided on the water diversion pipe 5.1;

[0083] A water collecting box 5.2 is movably provided in the hydraulic sweeper 5, and the water collecting box 5.2 cooperates with the hydraulic sweeper 5 to form a piston structure, the bottom of the water collecting box 5.2 forms an elastic cooperation with the bottom of the inner wall of the hydraulic sweeper 5 through the first spring 5.3, a fixed pulley 5.5 is provided on the top of the hydraulic sweeper 5, the top of the water collecting box 5.2 forms a fixed pulley linkage cooperation with the movable pulley 5.7 through the first pulling rope 5.6.1 and the fixed pulley 5.5, a fixed plate 5.1.2 is provided on the PVC drainage pipe 1.2 at the bottom of the hydraulic sweeper 5, the top of the fixed plate 5.1.2 forms a movable pulley linkage cooperation with the cleaning soft brush 5.8 through the second pulling rope 5.6.2 and the movable pulley 5.7, and the cleaning soft brush 5.8 brushes along the surface of the solar panel 4 under the linkage cooperation of the movable pulley;

[0084] The upper and lower parts of the hydraulic sweeper 5 are provided with stoppers 5.4 respectively, and the stoppers 5.4 are arranged symmetrically about the middle position of the hydraulic sweeper 5, and the water collecting box 5.2 and the stoppers 5.4 form a releasable limit fit.

[0085] When the water collecting box 5.2 descends, the first pulling rope 5.6.1 drives the movable pulley 5.7 to rise, and when the water collecting box 5.2 rises, the movable pulley 5.7 falls back; one end of the second pulling rope 5.6.2 is fixed, and the other end passes around the movable pulley 5.7 and is connected to the cleaning soft brush 5.8. When the movable pulley 5.7 moves, the displacement distance of the cleaning soft brush 5.8 is twice that of the movable pulley 5.7. The water diversion pipe 5.1 is respectively connected to the PVC drainage pipe 1.2 and the hydraulic sweeper 5, and the end connected to the hydraulic sweeper 5 is provided with a water blocking valve 5.1.1; the water collecting box 5.2 has a protruding opening 5.2.1 at the joint between the water diversion pipe 5.1 and the water collecting box 5.2, and a drain valve 5.2.2 is provided on the side close to the PVC drainage pipe 1.2. The upper and lower sides of the water collecting box 5.2 are respectively connected to the first pulling rope 5.6.1 and the spring 5.3, and the characteristics are as follows: the water collecting box 5. When it rises to the predetermined water replenishment position, the protruding opening 5.2.1 will open the water blocking valve 5.1.1, and water will be replenished into the water collecting box 5.2. When the water is filled sufficiently, the water collecting box 5.2 closes the stopper 5.4 and slides to the bottom. At this time, the drain valve 5.2.2 opens, and the water in the water collecting box 5.2 flows back to the PVC drainage pipe 1.2 through the drain port 5.9. Then the spring 5.3 pushes the water collecting box 5.2 to close the stopper 5.4 and return to the water replenishment position.

[0086] As a preferred embodiment 5, the hydraulic sweeper 5 is provided with a drain port 5.9 below the stopper 5.4 at the bottom, and the hydraulic sweeper 5 is connected to the PVC drainage pipe 1.2 through the drain port 5.9, the top of the water collecting box 5.2 is provided with a protruding opening 5.2.1 for receiving the flowing water, and a drain valve 5.2.2 is provided at one side of the bottom of the water collecting box 5.2;

[0087] When the drain valve 5.2.2 does not overlap with the drain port 5.9, the drain valve 5.2.2 is closed by the inner wall limit of the hydraulic sweeper 5, and the water collecting box 5.2 is not connected with the drain port 5.9;

[0088] When the drain valve 5.2.2 overlaps with the drain port 5.9, the drain valve 5.2.2 opens under the action of the gravity of the flowing water, and the water collecting box 5.2 is connected with the drain port 5.9 and forms a water diversion cooperation with the PVC drainage pipe 1.2 through the drain port 5.9.

[0089] As a preferred embodiment 6, the stopper 5.4 is movably embedded in the inner wall of the hydraulic sweeper 5, and the bottom of the stopper 5.4 forms an elastic fit with the inner wall of the hydraulic sweeper 5 through the second spring 5.4.1;

[0090] The limiter 5.4 includes a sliding block 5.4.2, the bottom of which is connected to the second spring 5.4.1, a rotating groove 5.4.5 is provided on the top of the sliding block 5.4.2, a single torsion spring 5.4.3 is provided on one side of the top of the rotating groove 5.4.5, and the top side of the rotating groove 5.4.5 is elastically hinged with the rotating block 5.4.4 through the single torsion spring 5.4.3, and the rotating block 5.4.4 can be rotated around the single torsion spring 5.4.3 and embedded in the rotating groove 5.4.5;

[0091] In the initial state, the single torsion spring 5.4.3 is in an energy release state, the rotating block 5.4.4 stands upright directly above the rotating groove 5.4.5, and the rotating block 5.4.4 is exposed from the inner wall of the hydraulic sweeper 5, the rotating block 5.4.4 of the lower limiter 5.4 rotates around the single torsion spring 5.4.3 toward the bottom of the slope, and the rotating block 5.4.4 of the upper limiter 5.4 rotates around the single torsion spring 5.4.3 toward the top of the slope.

[0092] The sliding block 5.4.2 is connected to the spring 5.4.1 and can slide up and down; the rotating block 5.4.4 is hinged to the sliding block 5.4.2 and can be rotated and retracted into the sliding block 5.4.2. After the rotating block 5.4.4 is screwed into the sliding block 5.4.2, it relies on the single torsion spring 5.4.3 to realize the return rotation; when the moving direction of the water collecting box 5.2 is the rotation direction of the rotating block 5.4.4, it can pass easily. At this time, the rotating block 5.4.4 is screwed into the sliding block 5.4.2. When the moving direction of the water collecting box 5.2 is the reverse rotation direction of the rotating block 5.4.4, it is more difficult to pass. At this time, the rotating block 5.4.4 will not rotate. Only when the force applied by the water collecting box 5.2 can make the sliding block 5.4.2 compress the spring 5.4.1 can it pass.

[0093] As a preferred embodiment 7, the hollow anchor rod 2 comprises an anchor rod barrel 2.1, an anchor rod tip 2.2 is provided at the bottom of the anchor rod barrel 2.1, a mounting groove 2.6 is provided in the anchor rod barrel 2.1 near the anchor rod tip 2.2, a lifting type anchor 3 is embedded in the anchor rod barrel 2.1, and the bottom end of the lifting type anchor 3 forms a snap fit with the mounting groove 2.6, and a side wall of the anchor rod barrel 2.1 is provided with a reserved opening 2.4, and the top of each reserved opening 2.4 is provided with an inverted L-shaped slot 2.3;

[0094] The top of the anchor rod cylinder 2.1 is provided with an outer limiting ring 2.5 and a mounting hole 2.1.1. The anchor rod cylinder 2.1 forms a limiting fit with the slope surface of the slope body 1 through the outer limiting ring 2.5 and the fasteners. The solar panel 4 forms a detachable fixed fit with the mounting hole 2.1.1 through the support 4.1.

[0095] An installation hole 2.1.1 is reserved at the upper end of the anchor rod cylinder 2.1, which can be connected to the solar panel 4; the reserved opening 2.4 is located at the notch of the inverted L-shaped slot 2.3, and the anchoring tip 3.5 of the pulling type anchor 3 can pass through; the installation slot 2.6 can be used for the bottom end of the pulling type anchor 3 to be inserted.

[0096] As a preferred embodiment 8, the lifting anchor 3 includes an internally hollow push rod 3.3, an openable anchor tip 3.5 is provided at the bottom of the push rod 3.3, a rolling shaft 3.4 that can slide along the push rod 3.3 is provided at the bottom of the push rod 3.3, the anchor tip 3.5 penetrates the push rod 3.3 and is hinged to the rolling shaft 3.4, a lifting rope 3.1 is provided inside the push rod 3.3, the lifting rope 3.1 penetrates the push rod 3.3 and is connected to the rolling shaft 3.4 to form a linkage, an electric circuit 3.2 is provided on the lifting rope 3.1, and the anchor tip 3.5 forms an electric connection with the power supply end of the solar panel 4 assembly through the electric circuit 3.2;

[0097] When not anchored, the anchoring part of the lifting anchor 3 is folded and embedded in the reserved opening 2.4 and forms a limiting fit with the inverted L-shaped slot 2.3;

[0098] During anchoring, the pulling rope 3.1 drives the rolling shaft 3.4, the anchoring tip 3.5 opens and penetrates into the slope 1 from the reserved opening 2.4, and forms a limiting fit with the inverted L-shaped slot 2.3.

[0099] The push rod 3.3 is hollow, and the rod body is provided with symmetrical holes 3.3.1 for the pull rope 3.1 to pass through;

[0100] The power line 3.2 is fixed together with the lifting rope 3.1 and connected to two anchoring tips 3.5; the anchoring tips 3.5 are hinged on the rolling shaft 3.4 and can rise synchronously along the push rod 3.3 under the action of the lifting rope 3.1;

[0101] When the lifting anchor 3 enters the predetermined position, the external lifting rope 3.1 is pulled, and the anchor tip 3.5 passes through the reserved opening 2.4 and is inserted into the slope 1 and goes deeper horizontally, and the lifting is continued until the rolling shaft 3.4 rises to the predetermined height, and the lifting anchor 3 is fixed as a whole. After power is turned on, the two anchor tips 3.5 can act as the two poles of the power supply to absorb heavy metal ions in the soil.

[0102] As a preferred embodiment 9, the adjacent planting boxes 6 arranged along the slope are limitedly matched by anchoring thorns 6.2;

[0103] The anchoring thorns 6.2 include inner thorns 6.2.1 arranged at the bottom of the bottom surface of the planting box 6 and outer thorns 6.2.2 arranged at the top of the bottom surface of the planting box 6. The inner thorns 6.2.1 of the adjacent planting boxes 6 arranged along the slope are embedded in the outer thorns 6.2.2 to form a limited fit, and the outer thorns 6.2.2 of the planting box 6 are embedded in the slope 1.

[0104] An annular water supply box 6.1 is arranged around the outside of the plant box 6. The annular water supply box 6.1 is connected to the PVC drainage pipe 1.2 through a water supply pipe 6.3. The annular water supply box 6.1 is connected to the inside of the plant box 6 through a water-absorbing cotton strip 6.4.

[0105] As a preferred embodiment 10, the open vegetation box 6 is filled with bulk soil and vegetation bags, and the components in the soil matrix of the bulk soil are respectively calculated by weight as follows: 85-88 parts of soil, 6-9 parts of biochar, 0.5 parts of soil microorganisms, and 4-5 parts of additives; the vegetation bag is additionally added with 1-2 parts of plant seeds.

[0106] As a preferred embodiment 11, an application method of a photovoltaic device for treating heavy metal soil pollution, a method for repairing an open-pit mining slope using the photovoltaic device for treating heavy metal soil pollution, the steps include the following:

[0107] Step 1: Dig out the water storage area 1.4 3-4 meters inward from the outer edge of the top of the slope, and organize the equipment room 1.3. Place the water pumping device, ventilation device, reverse osmosis desalination device, storage battery pack and build a purification pool in the equipment room 1.3;

[0108] Step 2: Clean the slope, reserve a 1.5-meter-wide horse and pedestrian path 1.5 at 1 / 3 of the slope from the top, reserve a drainage ditch 1.6 in the middle of the horse and pedestrian path 1.5, and level the slope. Add additives, biochar and microorganisms to the cleaned floating soil to make it suitable for plant growth. Divide the improved soil into two batches, one batch is loose soil, and the other batch is evenly mixed with plant seeds and put into vegetation bags for subsequent use;

[0109] Step 3: Lay cement blanket 1.1 2 meters from the outer edge of the top of the slope, so that it covers the slope and the non-pedestrian path 1.5 and fits the inner wall of the drainage ditch 1.6. The upper and lower ends of the cement blanket 1.1 are fixed with soil nails. Hollow anchor rods 2 are driven into the predetermined points along the slope from top to bottom. When the outer limiting ring 2.5 of the hollow anchor rod 2 is close to the cement blanket 1.1, the penetration is stopped to make the exposed length of the hollow anchor rod 2 uniform. The hollow anchor rods 2 are installed in this way until the slope above the non-pedestrian path 1.5 is fully covered;

[0110] Step 4: Lay the PVC drainage pipe 1.2 from the top of the slope to the foot of the slope, so that it passes between two adjacent hollow anchor rods 2 in the horizontal direction, press the PVC drainage pipe 1.2 so that its lower part fits the slope surface, and use the pipe clip to fix the PVC drainage pipe 1.2 on the cement blanket 1.1 and the slope surface; install a pump pipe 1.7 in the same way to fix it on the slope surface;

[0111] Step 5: Install the annular water supply box 6.1 after the hole is rotated on the outside of the open planting box 6, and use the absorbent cotton strip 6.4 to extend into the planting box 6 through the hole. In the area on the slope below the pedestrian and horse path 1.5 where the cement blanket 1.1 is not laid, squeeze the anchor thorns 6.2 of the planting box 6 into the slope 1, and install it from bottom to top along the slope surface, so that the outer thorns 6.2.2 at the rear of the planting box 6 are all inserted into the slope 1 to form a planting array, and the inner thorns 6. 2.1 Insert the outer thorns 6.2.2 of the previous adjacent vegetation box 6 into a limited fit, so that it is fixed on both sides of the PVC drainage pipe 1.2, and connect the water supply pipe 6.3 on the annular water supply box 6.1 to the PVC drainage pipe 1.2, sprinkle some biochar particles on the bottom of the vegetation box 6, and then use the improved soil prepared in step 1 to fill the open vegetation box 6 in the way of sealing the lower vegetation bag with loose soil, and fill the gaps between the vegetation bags with bulk soil;

[0112] Step 6: Place the lifting anchor 3 into the hollow anchor rod 2 and rotate it so that the lifting anchor 3 is stuck in the inverted L-shaped slot 2.3, pull the lifting rope 3.1 on the top of the lifting anchor 3 outward, so that the anchoring tip 3.5 of the lifting anchor 3 passes through the reserved opening 2.4 of the hollow anchor rod 2 and is inserted into the slope 1, pre-install the solar panel 4 on the hollow anchor rod 2 in the area where the cement blanket 1.1 is laid to form a solar array, install an ash collector 4.2 at the bottom of the solar panel 4, divide the power output line of each solar panel 4 into two ends, and connect the power line 3.2 of the lifting anchor 3 and the battery pack on the top of the slope respectively; then put the support 4.1 under the solar panel 4 on the outer limit ring 2.5 of the hollow anchor rod 2, and fix it with bolts and the mounting hole 2.1.1; install the hydraulic sweeper 5 on the PVC drainage pipe 1.2, and adjust the cleaning soft brush 5.8 of the hydraulic sweeper 5 to fit the solar panel 4;

[0113] Step 7: Use the generator to power the battery pack at the top of the slope, so that the equipment room 1.3 starts to operate. The water pumping device pumps the water in the water accumulation area 1.8 at the bottom of the slope to the purification pool at the top of the slope, and is treated by the reverse osmosis desalination device. The desalinated water flows into the water storage area 1.4. When the water storage is sufficient, the water in the water storage area 1.4 is used to irrigate the cement blanket 1.1, and the excess water flows into the drainage ditch 1.6 for drainage;

[0114] Step 8: Remove the generator, and rely on the solar panel 4 to power the battery pack during the day. When the power reserve is sufficient, the equipment room 1.3 starts to operate, and the water pumping device pumps the water in the water accumulation area 1.8 at the bottom of the slope to the purification pool on the top of the slope. The reverse osmosis desalination device performs desalination treatment and replenishes the desalinated water into the water storage area 1.4. At night, the water in the water storage area 1.4 is discharged through the PVC drainage pipe 1.2. During the discharge process, the cleaning soft brush 5.8 of the hydraulic sweeper 5 reciprocates over the solar panel 4, and part of the discharged water is replenished into the annular water supply box 6.1 for seed germination and growth, and the construction is completed;

[0115] Step 9: When the PVC drainage pipe 1.2 is not drained, the water collecting box 5.2 is located at the predetermined water replenishment position under the support of the spring 5.3. At this time, the protruding opening 5.2.1 contacts the water blocking valve 5.1.1, and the water blocking valve 5.1.1 is opened to allow water to flow through. When the PVC drainage pipe 1.2 is drained, the water flows into the water collecting box 5.2 through the water diversion pipe 5.1. When the water collecting box 5.2 is sufficiently replenished, it begins to slide downward obliquely under the action of gravity. During this process, the protruding opening 5.2.1 gradually separates from the water blocking valve 5.1.1. The water blocking valve 5.1.1 is automatically closed under the impact of the water flow and the action of its own weight, and stops allowing water to flow through;

[0116] Step 10: When the water collecting box 5.2 slides down from top to bottom, it first contacts the upper stopper 5.4. At this time, the sliding direction of the water collecting box 5.2 cannot make the rotating block 5.4.4 rotate. The water collecting box 5.2 can pass through only when the stopper 5.4 is flush with the inner surface by squeezing the rotating block 5.4.4 and the sliding block 5.4.2 to move into the inner wall of the hydraulic sweeper 5 and compressing the spring 5.4.1; When the water collecting box 5.2 contacts the lower stopper 5.4, the sliding direction can make the rotating block 5.4.4 rotate and be received in the rotating groove 5.4.5 of the sliding block 5.4.2. At this time, the stopper 5.4 is flush with the inner surface, and the water collecting box 5.2 can pass through easily; When the water collecting box 5.2 slides down to the drain port 5.9, the drain valve 5.2.2 loses the support of the inner wall and opens under the action of the gravity of the water, and the water in the water collecting box 5.2 flows back to the PVC drainage pipe 1.2;

[0117] Step 11: When the water in the water collecting box 5.2 is drained, the elastic force of the spring 5.3 is greater than the resistance of the limiter 5.4 and the deadweight of the water collecting box 5.2, and the water collecting box 5.2 rises from bottom to top, and the drain valve 5.2.2 gradually fits the inner wall and closes; in this process, the water collecting box 5.2 first contacts the limiter 5.4 below, because the sliding direction cannot make the rotating block 5.4.4 rotate, and the water collecting box 5.2 can pass only when the limiter 5.4 is flush with the inner surface by squeezing the rotating block 5.4.4 and the sliding block 5.4.2 to move inward and compressing the spring 5.4.1; when the water collecting box 5.2 contacts the limiter 5.4 above, the sliding direction can make the rotating block 5.4.4 rotate and be collected in the sliding block 5.4.2, and at this time the limiter 5.4 is flush with the inner surface, and the water collecting box 5.2 can easily pass until it rises to the predetermined water replenishment position and stops.

Claims

1. A photovoltaic device for treating heavy metal soil pollution, comprising a slope (1), characterized in that: A solar array and a vegetation array are arranged in sequence on the slope surface of the slope body (1); the solar array is located above the vegetation array, and the solar array and the vegetation array are separated by a horizontally arranged pedestrian and horse path (1.5); The solar array comprises a plurality of uniformly arranged solar panels (4), each of the solar panels (4) being detachably fixedly matched with the slope (1) via a hollow anchor rod (2), a lifting anchor piece (3) being provided inside the hollow anchor rod (2), the hollow anchor rod (2) being detachably fixedly matched with the slope (1) via the lifting anchor piece (3), and the lifting anchor piece (3) of the solar array being electrically matched with the solar panel (4); The vegetation array comprises a plurality of evenly arranged vegetation boxes (6), and the vegetation boxes (6) are all detachably fixedly matched with the slope surface of the slope body (1) through anchoring spikes (6.2); A cement blanket (1.1) is provided on the slope (1), and a water accumulation area (1.8) is provided at the bottom of the slope (1). The water accumulation area (1.8) forms a traction match with a water pump in an equipment room (1.3) located at the top of the slope (1) through a water pump pipe (1.7). The drainage outlet of the water pump in the equipment room (1.3) is connected to a water storage area (1.4) located at the top of the slope (1). The water outlet of the water storage area (1.4) is connected to a plurality of groups of PVC drainage pipes (1.2), and each group of PVC drainage pipes (1.2) flows downward along the slope through the solar panels (4) of the solar array and the vegetation boxes (6) of the vegetation array in sequence. Two solar panels (4) adjacent to each other in the horizontal direction form a pair. Each pair of solar panels (4) is arranged at equal intervals on the slope. The corresponding PVC drainage pipes (1.2) pass between the solar panels (4) of the same pair. A hydraulic sweeper (5) is provided on the solar panels (4) of the same pair. The hydraulic sweeper (5) forms a linkage with the water passing through the corresponding PVC drainage pipe (1.2). Each solar panel (4) is parallel to the slope, and a support ( 4.1), the support (4.1) and the top of the corresponding hollow anchor rod (2) form a detachable fixed fit, the bottom of the solar panel (4) is provided with an ash collector (4.2), and the hydraulic sweeper (5) collects the ash on the solar panel (4) into the ash collector (4.2); The hydraulic sweeper (5) is fixed on the corresponding PVC drainage pipe (1.2), and the top of the hydraulic sweeper (5) is connected to the PVC drainage pipe (1.2) through a water diversion pipe (5.1), and a water blocking valve (5.1.1) is provided on the water diversion pipe (5.1); A water collecting box (5.2) is movably provided in the hydraulic cleaning machine (5), and the water collecting box (5.2) cooperates with the hydraulic cleaning machine (5) to form a piston structure. The bottom of the water collecting box (5.2) forms an elastic fit with the bottom of the inner wall of the hydraulic cleaning machine (5) through a first spring (5.3). A fixed pulley (5.5) is provided on the top of the hydraulic cleaning machine (5). The top of the water collecting box (5.2) is pulled by a first pulling rope (5.6.1) and the fixed pulley (5.6.1). .5) forms a fixed pulley linkage with the movable pulley (5.7), a fixed plate (5.1.2) is provided on the PVC drainage pipe (1.2) at the bottom of the hydraulic sweeper (5), and the top of the fixed plate (5.1.2) forms a movable pulley linkage with the cleaning soft brush (5.8) through the second pulling rope (5.6.2) and the movable pulley (5.7), and the cleaning soft brush (5.8) brushes along the surface of the solar panel (4) under the linkage with the movable pulley; The upper and lower parts of the hydraulic sweeper (5) are respectively provided with stoppers (5.4), and the stoppers (5.4) are symmetrically arranged about the middle position of the hydraulic sweeper (5), and the water collection box (5.2) and the stoppers (5.4) form a releasable stop fit; The hydraulic sweeper (5) is provided with a drain port (5.9) below the stopper (5.4) at the bottom, and the hydraulic sweeper (5) is connected to the PVC drainage pipe (1.2) through the drain port (5.9); the top of the water collecting box (5.2) is provided with a protruding opening (5.2.1) for receiving flowing water, and a drain valve (5.2.2) is provided on one side of the bottom of the water collecting box (5.2); When the drain valve (5.2.2) does not overlap with the drain port (5.9), the drain valve (5.2.2) is closed by the inner wall limit of the hydraulic cleaning machine (5), and the water collecting box (5.2) is not connected with the drain port (5.9); When the drain valve (5.2.2) and the drain port (5.9) overlap, the drain valve (5.2.2) opens under the action of the gravity of the flowing water, and the water collecting box (5.2) is connected to the drain port (5.9) and forms a water diversion coordination with the PVC drainage pipe (1.2) through the drain port (5.9).

2. A photovoltaic device for treating heavy metal soil pollution according to claim 1, characterized in that: The stopper (5.4) is movably embedded in the inner wall of the hydraulic sweeper (5), and the bottom of the stopper (5.4) forms an elastic fit with the inner wall of the hydraulic sweeper (5) via a second spring (5.4.1); The limiter (5.4) comprises a sliding block (5.4.2), the bottom of the sliding block (5.4.2) is connected to the second spring (5.4.1), the top of the sliding block (5.4.2) is provided with a rotation groove (5.4.5), a single torsion spring (5.4.3) is provided on one side of the top of the rotation groove (5.4.5), and the top side of the rotation groove (5.4.5) forms an elastic hinged fit with the rotation block (5.4.4) through the single torsion spring (5.4.3), and the rotation block (5.4.4) can be rotated around the single torsion spring (5.4.3) and embedded in the rotation groove (5.4.5); In the initial state, the single torsion spring (5.4.3) is in an energy release state, the rotating block (5.4.4) stands upright directly above the rotating groove (5.4.5), and the rotating block (5.4.4) is exposed from the inner wall of the hydraulic sweeper (5), the rotating block (5.4.4) of the lower limiter (5.4) rotates around the single torsion spring (5.4.3) toward the bottom of the slope, and the rotating block (5.4.4) of the upper limiter (5.4) rotates around the single torsion spring (5.4.3) toward the top of the slope.

3. A photovoltaic device for treating heavy metal soil pollution according to any one of claims 1 to 2, characterized in that: The hollow anchor rod (2) comprises an anchor rod barrel (2.1), an anchor rod tip (2.2) is provided at the bottom of the anchor rod barrel (2.1), a mounting groove (2.6) is provided in the anchor rod barrel (2.1) on one side close to the anchor rod tip (2.2), a lifting type anchor piece (3) is embedded in the anchor rod barrel (2.1), and the bottom end of the lifting type anchor piece (3) forms a snap fit with the mounting groove (2.6), a side wall of the anchor rod barrel (2.1) is provided with a reserved opening (2.4), and the top of each reserved opening (2.4) is provided with an inverted L-shaped snap groove (2.3); An outer limiting ring (2.5) and a mounting hole (2.1.1) are provided at the top of the anchor rod cylinder (2.1); the anchor rod cylinder (2.1) forms a limiting fit with the slope surface of the slope body (1) through the outer limiting ring (2.5) and the fasteners; and the solar panel (4) forms a detachable fixed fit with the mounting hole (2.1.1) through the support (4.1).

4. A photovoltaic device for treating heavy metal soil pollution according to claim 3, characterized in that: The lifting anchor (3) comprises a push rod (3.3) with a hollow interior, an openable anchor tip (3.5) being provided at the bottom of the push rod (3.3), a rolling shaft (3.4) being provided at the bottom of the push rod (3.3) and being able to slide along the push rod (3.3), the anchor tip (3.5) penetrating the push rod (3.3) and being hinged to the rolling shaft (3.4), a lifting rope (3.1) being provided inside the push rod (3.3), the lifting rope (3.1) penetrating the push rod (3.3) and being connected to the rolling shaft (3.4) to form a linkage fit, an electric circuit (3.2) being provided on the lifting rope (3.1), and the anchor tip (3.5) being connected to the power supply end of the solar panel (4) assembly through the electric circuit (3.2); When not anchored, the anchoring portion of the lifting anchor (3) is retracted and embedded in the reserved opening (2.4) and forms a limiting fit with the inverted L-shaped slot (2.3); During anchoring, the pulling rope (3.1) drives the rolling shaft (3.4), and the anchoring tip (3.5) opens and penetrates the slope (1) from the reserved opening (2.4), and forms a limiting fit with the inverted L-shaped slot (2.3).

5. A photovoltaic device for treating heavy metal soil pollution according to claim 4, characterized in that: Adjacent planting boxes (6) arranged along the slope are positioned to form a limited fit through anchoring thorns (6.2); The anchoring spikes (6.2) include inner spikes (6.2.1) disposed at the bottom of the bottom surface of the planting box (6) and outer spikes (6.2.2) disposed at the top of the bottom surface of the planting box (6), the inner spikes (6.2.1) of adjacent planting boxes (6) arranged along the slope surface are embedded in the outer spikes (6.2.2) to form a limited fit, and the outer spikes (6.2.2) of the planting box (6) are embedded in the slope body (1); An annular water supply box (6.1) is arranged around the outside of the vegetation box (6); the annular water supply box (6.1) is connected to the PVC drainage pipe (1.2) via a water supply pipe (6.3); and the annular water supply box (6.1) is connected to the inside of the vegetation box (6) via a water-absorbing cotton strip (6.4).

6. An application method of a photovoltaic device for treating heavy metal soil pollution, characterized in that: The method for repairing an open-pit mining slope using a photovoltaic device for treating heavy metal soil pollution as claimed in claim 5 comprises the following steps: Step 1: Dig out a water storage area (1.4) 3 to 4 meters inward from the outer edge of the top of the slope, and organize an equipment room (1.3). Place a water pump, ventilation device, reverse osmosis desalination device, battery pack and build a purification pool in the equipment room (1.3); Step 2: clean the slope, reserve a 1.5-meter-wide horse and pedestrian path (1.5) at 1 / 3 of the slope from the top, reserve a drainage ditch (1.6) in the middle of the horse and pedestrian path (1.5), and level the slope. Add additives, biochar and microorganisms to the cleaned floating soil to make it suitable for plant growth. Divide the improved soil into two batches, one batch is loose soil, and the other batch is evenly mixed with plant seeds and packed into vegetation bags for subsequent use; Step 3: Lay a cement blanket (1.1) 2 meters from the outer edge of the top of the slope so that it covers the side slope and the pedestrian and horse path (1.5) and fits the inner wall of the drainage ditch (1.6). The upper and lower ends of the cement blanket (1.1) are fixed with soil nails. Hollow anchor rods (2) are driven into the predetermined points along the slope from top to bottom. When the outer limiting ring (2.5) of the hollow anchor rod (2) is close to the cement blanket (1.1), the penetration is stopped, so that the exposed length of the hollow anchor rod (2) is uniform. The hollow anchor rods (2) are installed in this way until they cover the side slope above the pedestrian and horse path (1.5); Step 4: Lay the PVC drainage pipe (1.2) from the top of the slope to the bottom of the slope so that it passes between two adjacent hollow anchor rods (2) in the horizontal direction, press the PVC drainage pipe (1.2) so that its lower part fits the slope surface, and use pipe clips to fix the PVC drainage pipe (1.2) to the cement blanket (1.1) and the slope surface; install a water pump pipe (1.7) in the same way and fix it on the slope surface; Step 5: Install the annular water supply box (6.1) after the hole is rotated on the outside of the open vegetation box (6), and use a water-absorbing cotton strip (6.4) to pass through the hole and extend into the vegetation box (6). In the area on the slope below the pedestrian and horse path (1.5) where the cement blanket (1.1) is not laid, squeeze the anchoring thorns (6.2) of the vegetation box (6) into the slope (1), and install it from bottom to top along the slope surface, so that the outer thorns (6.2.2) at the rear of the vegetation box (6) are all inserted into the slope (1), forming a vegetation array, and the front of the vegetation box (6) is The inner thorn (6.2.1) is inserted into the outer thorn (6.2.2) of the previous adjacent vegetation box (6) to form a limit fit, so that it is fixed on both sides of the PVC drainage pipe (1.2), and the water supply pipe (6.3) on the annular water supply box (6.1) is connected to the PVC drainage pipe (1.2), and some biochar particles are sprinkled on the bottom of the vegetation box (6), and then the improved soil prepared in step 1 is used to fill the open vegetation box (6) in a way that the loose soil is capped at the bottom of the vegetation bag, and the gaps between the vegetation bags are filled and compacted with bulk soil; Step 6: Place the lifting anchor (3) into the hollow anchor rod (2) and rotate it so that the lifting anchor (3) is inserted into the inverted L-shaped slot (2.3). Pull the lifting rope (3.1) at the top of the lifting anchor (3) outward so that the anchoring tip (3.5) of the lifting anchor (3) passes through the reserved opening (2.4) of the hollow anchor rod (2) and is inserted into the slope (1). Pre-install the solar panel (4) on the hollow anchor rod (2) in the area where the cement blanket (1.1) is laid to form a solar array. Install the solar panel (4) at the bottom of the solar panel (4). The dust collector (4.2) divides the power output line of each solar panel (4) into two ends, respectively connecting the power supply line (3.2) of the lifting anchor (3) and the storage battery pack on the top of the slope; then, the support (4.1) under the solar panel (4) is placed on the outer limit ring (2.5) of the hollow anchor rod (2) and fixed with the mounting hole (2.1.1) by bolts; the hydraulic sweeper (5) is installed on the PVC drainage pipe (1.2), and the cleaning soft brush (5.8) of the hydraulic sweeper (5) is adjusted to fit the solar panel (4); Step 7: Use a generator to power the battery pack at the top of the slope, so that the equipment room (1.3) starts to operate. The water pumping device pumps the water from the water accumulation area (1.8) at the bottom of the slope to the purification pool at the top of the slope, and is treated by the reverse osmosis desalination device. The desalinated water flows into the water storage area (1.4). When the water storage is sufficient, the water in the water storage area (1.4) is used to irrigate and maintain the cement blanket (1.1), and the excess water flows into the drainage ditch (1.6) for drainage; Step 8: Remove the generator and rely on the solar panel (4) to supply power to the battery pack during the day. When the power reserve is sufficient, the equipment room (1.3) starts to operate. The water pumping device pumps the water from the water accumulation area (1.8) at the bottom of the slope to the purification pool at the top of the slope. The reverse osmosis desalination device performs desalination treatment and replenishes the desalinated water into the water storage area (1.4). At night, the water in the water storage area (1.4) is discharged through the PVC drainage pipe (1.2). During the discharge process, the cleaning soft brush (5.8) of the hydraulic sweeper (5) reciprocates across the solar panel (4), and part of the discharged water is replenished into the annular water supply box (6.1) for seed germination and growth, completing the construction; Step 9: When the PVC drainage pipe (1.2) is not draining, the water collecting box (5.2) is located at a predetermined water replenishment position under the support of the spring (5.3). At this time, the protruding opening (5.2.1) contacts the water blocking valve (5.1.1), and the water blocking valve (5.1.1) is opened to allow water to flow through. When the PVC drainage pipe (1.2) is draining, the water flows into the water collecting box (5.2) through the water diversion pipe (5.1). When the water collecting box (5.2) is sufficiently replenished with water, it begins to slide obliquely downward under the action of gravity. During this process, the protruding opening (5.2.1) gradually separates from the water blocking valve ( 5.1.1), the water-blocking valve (5.1.1) automatically closes under the impact of the water flow and its own weight, stopping the water flow; Step 10: When the water collecting box (5.2) slides from top to bottom, it first contacts the upper stopper (5.4). At this time, the sliding direction of the water collecting box (5.2) cannot cause the rotating block (5.4.4) to rotate. The rotating block (5.4.4) and the sliding block (5.4.2) are squeezed to move toward the inner wall of the water cleaning machine (5) and the spring (5.4.1) is compressed. Only when the stopper (5.4) is flush with the inner surface, the water collecting box (5.2) can pass through. The water collecting box (5.2) contacts the lower When the stopper (5.4) is moved, the sliding direction can make the rotating block (5.4.4) rotate and be received in the rotating groove (5.4.5) of the sliding block (5.4.2). At this time, the stopper (5.4) is flush with the inner surface, and the water collecting box (5.2) can easily pass through; when the water collecting box (5.2) slides to the drain port (5.9), the drain valve (5.2.2) loses the support of the inner wall and opens under the action of the gravity of the water, and the water in the water collecting box (5.2) flows back to the PVC drainage pipe (1.2); Step 11: When the water in the water collecting box (5.2) is completely drained, the elastic force of the spring (5.3) is greater than the resistance of the stopper (5.4) and the deadweight of the water collecting box (5.2), and the water collecting box (5.2) rises from bottom to top, and the drain valve (5.2.2) gradually fits the inner wall and closes; during this process, the water collecting box (5.2) first contacts the stopper (5.4) below, and the rotating block (5.4.4) cannot rotate due to the sliding direction, and the rotating block (5.4.4) and the drain valve (5.2.2) are squeezed and closed. The sliding block (5.4.2) moves inward and compresses the spring (5.4.1), so that the water collecting box (5.2) can pass through only when the stopper (5.4) is flush with the inner surface; when the water collecting box (5.2) contacts the upper stopper (5.4), the sliding direction can make the rotating block (5.4.4) rotate and be received in the sliding block (5.4.2), at which time the stopper (5.4) is flush with the inner surface, and the water collecting box (5.2) can pass through easily until it rises back to the predetermined water replenishment position and stops.

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