River water quality purification system based on ecological restoration

Abstract

The invention provides a riverway water quality purification system based on ecological restoration, and belongs to the technical field of water conservancy projects. According to the technical scheme, the ecological restoration system comprises an ecological restoration unit, the ecological restoration unit comprises an ecological floating island module, the ecological floating island module comprises a floating plate, aquatic plants planted on the floating plate and a microbial carrier suspended below the floating plate, and the floating plate is provided with a plurality of limiting mechanisms used for limiting the floating island module; the limiting mechanism comprises a long round rod penetrating through the gap between the adjacent units, and a conical part is arranged at the lower end of the long round rod. The riverway water quality purification system based on ecological restoration has the beneficial effects that purification of riverway water quality is achieved, the treatment efficiency is high, the cost is low, in addition, due to the arrangement of the limiting mechanism, the floating island is firmly fixed and is also easy to detach, and therefore the position of the floating island can be conveniently moved according to the specific condition of the river surface.

Description

Technical Field

[0001] The present invention relates to the technical field of water conservancy projects, and particularly to a river water quality purification system based on ecological restoration. Background Art

[0002] With the acceleration of the urbanization process and the increase in industrial activities, the problem of river water quality pollution has become increasingly serious. Traditional river water quality purification methods mainly rely on physical filtration, chemical treatment, or biodegradation, but these methods often have problems such as low treatment efficiency, high cost, and easy secondary pollution. Especially in some ecologically fragile areas, it is difficult for traditional methods to balance the dual needs of water quality purification and ecological restoration. Therefore, it is of great significance to develop a technology that can not only efficiently purify water quality but also promote the restoration of the river ecosystem. Summary of the Invention

[0003] The purpose of the present invention is to provide a river water quality purification system based on ecological restoration that can not only efficiently purify water quality but also promote the restoration of the river ecosystem.

[0004] The present invention is achieved by the following measures: A river water quality purification system based on ecological restoration, characterized in that it includes an ecological restoration unit, the ecological restoration unit includes an ecological floating island module, the ecological floating island module includes a floating board, aquatic plants planted on the floating board, and a microbial carrier suspended below the floating board. The microbial carrier is a modified polyurethane porous material with a porosity of 80%-90%. A number of limiting mechanisms for limiting the floating island module are provided on the floating board; The floating board is a detachable splicing structure, composed of a number of unit boards connected together. The material is high-density polyethylene. The surface of the floating board is provided with a diversion groove to enhance water circulation. The unit boards are connected and fixed by bolts. As a specific embodiment, the unit board is a circular ring structure, and there is a gap between adjacent unit boards. The limiting mechanism is arranged through the gap; The limiting mechanism includes an oval rod passing through the gap between adjacent units. A tapered portion is provided at the lower end of the oval rod, and the tapered portion is more likely to be inserted into the mud of the riverbed, so as to easily fix the oval rod.

[0005] The specific features of the present invention also include: The conical part includes a cylindrical section. On one end face of the cylindrical section, there is a conical pointed tip. On the other end face of the cylindrical section, three groups of through holes are evenly arranged along the circumference. The three groups of through holes penetrate the outer side surface of the pointed tip. Air bags are arranged in the three groups of through holes. The opening of the air bag is turned outwards and fixed on the corresponding end face of the cylindrical section. The specific fixing method can be gluing. On the lower end face of the oblong rod, there are three groups of first round tubes that cooperate with the through holes. The free end of the first round tube is provided with a round chamfer, so that it can be stuck at the opening of the air bag to achieve sealing after connection. A long round hole is arranged inside the oblong rod, and the long round hole communicates with the three groups of first round tubes. An air charging pipe communicating with the long round hole is arranged on the outer side surface of the oblong rod near the upper end face. High-pressure air is charged through the air charging pipe. The high-pressure air enters the air bag after passing through the long round hole and the first round tube. Then the air bag expands downwards and presses the riverbed downwards, thereby providing an upward reaction force to the oblong rod, making it easy to pull out the oblong rod, so as to facilitate adjusting the position of the floating island.

[0006] External threads are arranged on the periphery of the cylindrical section. A sleeve is movably sleeved on the periphery of the oblong rod near the lower end face. Internal threads matching the external threads are arranged on the inner wall of the sleeve. A first limiting ring is arranged on the periphery of the oblong rod near the lower end face. Correspondingly, a second limiting ring matching the first limiting ring is arranged inside the upper end of the sleeve. After the three groups of first round tubes are stuck at the openings of the three groups of air bags, slide down the sleeve and rotate it to make it screwed on the conical part until the first limiting ring and the second limiting ring are pressed against each other tightly. At this time, the free end of the first round tube will tightly press and seal at the opening of the air bag.

[0007] An auxiliary fixing mechanism is also arranged on the periphery of the oblong rod. The auxiliary fixing mechanism includes a second round tube slidably sleeved on the periphery of the oblong rod. A pair of long sliding grooves are arranged on the periphery of the oblong rod. Correspondingly, a pair of long sliding rods matching the long sliding grooves are arranged on the inner wall of the second round tube. The long sliding rods are slidably arranged in the long sliding grooves. The up and down sliding of the second round tube along the oblong rod is realized through the cooperation of the long sliding rods and the long sliding grooves; A large bevel gear is rotatably arranged on the periphery of the second round tube. Three groups of first support rods are evenly arranged along the circumference on the periphery of the second round tube below the large bevel gear. A ground grabbing mechanism is arranged on each of the three groups of first support rods.

[0008] The ground gripping mechanism includes a cross bar provided at the free end of the first support rod. A T-shaped sliding groove penetrating through the front and back is provided on the cross bar. A T-shaped slider is slidably arranged in the T-shaped sliding groove. A long strip board is provided on the T-shaped slider. A through long groove is provided on one side of the upper surface of the long strip board. An irregular elastic board is provided on the upper surface of the long strip board. The irregular elastic board includes a short board fixed on the other side of the upper surface of the long strip board. An inclined board is provided on the side of the short board facing the long groove. A long board is provided at the free end of the inclined board. A ground gripping board matched with the long groove is vertically provided at the free end of the long board. The ground gripping board will penetrate through the long groove during operation and then insert into the riverbed mud below the long strip board.

[0009] The ground gripping mechanism further includes a second support rod provided on the first support rod. A rotating shaft is provided on the second support rod. A small bevel gear meshing with the large bevel gear is provided at one end of the rotating shaft. A sector wheel is provided at the other end of the rotating shaft. The outer arc surface of the sector wheel farthest from the axis of the rotating shaft cooperates with the upper surface of the long board. That is, when the sector wheel rotates, the outer arc surface presses on the long board, so that the ground gripping board passes through the long groove and inserts into the mud of the riverbed. A first round shaft is provided on the sector wheel. The first round shaft is close to the inner arc surface of the sector wheel closest to the axis of the rotating shaft. A second round shaft is provided on the upper surface of the long strip board near the short board. A connecting rod is movably connected between the first round shaft and the second round shaft. That is, one end of the connecting rod is rotatably arranged around the first round shaft, and the other end of the connecting rod is rotatably arranged around the second round shaft. Due to the action of the connecting rod, during the process of the sector wheel pressing down the irregular elastic board, the long strip board will slide backward, so that the ground gripping board makes a backward sliding movement while inserting into the mud, further enhancing the ground gripping effect, and further enhancing the auxiliary fixation of the whole device.

[0010] A handle is provided on the outer periphery of the upper end of the second round tube. The second round tube can be slid up and down through the handle. After inserting the lower end of the long round rod into the riverbed, the second round tube is pressed down through the handle to make the long strip board press tightly on the riverbed, and then the ground gripping mechanism is further used for auxiliary fixation; The second round tube is movably arranged on the outer periphery of a third round tube. The lower end of the third round tube is fixed on the large bevel gear. A rotating handle is provided at the upper end of the third round tube. The large bevel gear can be rotated through the rotating handle.

[0011] Application principle of the limit mechanism: During application, first insert the lower end of the oval rod into the soil of the riverbed. Then, press down the second circular tube through the handle, so that the long strip plate is pressed tightly against the riverbed. After that, rotate the handle to make the large bevel gear rotate. Then, the large bevel gear will drive three small bevel gears to rotate, thereby driving the corresponding sector wheels to rotate. When the outer arc surface of the sector wheel presses on the special-shaped elastic plate, the grasping floor of the special-shaped elastic plate will pass through the long slot and insert into the soil of the riverbed, thus realizing the auxiliary fixation of the oval rod and further realizing the fixation of the floating island. When it is necessary to move the position of the floating island, first rotate the large bevel gear through the handle, so that the outer arc surface of the sector wheel leaves the special-shaped elastic plate. Then, the grasping floor will leave the soil on the riverbed under the action of the self-elastic force of the special-shaped elastic plate. After that, high-pressure air is filled through the air charging pipe, and the inflation of the airbag provides an upward reaction force for the oval rod, so as to realize the easy removal of the whole device.

[0012] It also includes a pretreatment unit, which is arranged upstream of the river course and is used to intercept large particle suspended matters and regulate the water flow. The ecological restoration unit also includes a composite constructed wetland module and a biofilm carrier module arranged along the river course, which are used to remove pollutants through plant absorption, microbial degradation and physical adsorption. The ecological restoration unit is arranged downstream of the pretreatment unit.

[0013] The pretreatment unit includes a grille and a sedimentation tank. The aperture of the grille is 5 - 10 mm. The sedimentation tank is filled with porous ceramsite to adsorb heavy metal ions. The grille is usually located at the forefront of the pretreatment unit and is used to intercept large floating matters (such as branches and garbage) and coarse particle suspended matters in the water body, protecting the subsequent treatment equipment from being blocked. The process of the pretreatment unit is usually to remove large particle sundries through the grille first, and then enter the sedimentation tank to precipitate fine particles. The composite constructed wetland module is composed of a substrate layer, an emergent plant layer and a submerged plant layer. Among them, the substrate layer includes a mixture of zeolite, volcanic rock and biochar, and the mass ratio is 3:2:1; the emergent plant layer includes reed, cattail and calamus, and the planting density is 10 - 15 plants / m²; the submerged plant layer includes vallisneria, ceratophyllum demersum and myriophyllum verticillatum, and the coverage rate is 60% - 80%. The biofilm carrier module is a three-dimensional network structure, with a composite bacterium agent loaded on the surface, including nitrifying bacteria, denitrifying bacteria and photosynthetic bacteria, and the density of the bacterium agent is 10 6 -10 8 CFU / g.

[0014] It also includes a sediment restoration unit, which is composed of a sediment solidifier and a benthic biological release layer. The benthic biological release layer includes snails, clams and chironomid larvae, and the release density is 50-100 / m².

[0015] The beneficial effects of the present invention are as follows: the scheme realizes the purification of river water quality through the designed river water purification system based on ecological restoration, with high treatment efficiency and low cost. In addition, the setting of the limiting mechanism makes the floating island firmly fixed and easy to dismantle, so that the position of the floating island can be conveniently moved according to the specific conditions of the river surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the overall structure of the floating plate and the limiting mechanism in an embodiment of the present invention.

[0017] Figure 2 Schematic diagram of the structure of the limiting mechanism in an embodiment of the present invention.

[0018] Figure 3 for Figure 2 A is an enlarged view of the middle image.

[0019] Figure 4 for Figure 2 Enlarged view of B.

[0020] Figure 5 It is an exploded schematic diagram of the conical portion and the long round rod in an embodiment of the present invention.

[0021] Among them, the accompanying drawings are marked as follows: 1. floating plate; 2. limiting mechanism; 3. long round rod; 4. round tube 2; 5. round tube 3; 6. sleeve; 7. tapered portion; 8. rotating handle; 9. long slide groove; 10 inflation tube; 11. large bevel gear; 12. small bevel gear; 13. rotating shaft; 14. fan-shaped wheel; 15. connecting rod; 16. special-shaped elastic plate; 17. long strip plate; 18. long groove; 19. bracket rod 1; 20. bracket rod 2; 21. cross bar; 22. T-shaped slider; 23. limiting ring 1; 24 round tube 1; 25. cylindrical section; 26. pointed head; 27. airbag; 28. through hole. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0024] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0025] To clearly illustrate the technical features of this solution, the following will elaborate on this solution through specific embodiments.

[0026] Embodiment 1 A river water purification system based on ecological restoration includes an ecological restoration unit. The ecological restoration unit includes an ecological floating island module. The ecological floating island module includes a floating board 1, aquatic plants planted on the floating board 1, and a microbial carrier suspended below the floating board 1. The microbial carrier is a modified polyurethane porous material with a porosity of 80% - 90%. A number of limiting mechanisms 2 for limiting the floating island module are provided on the floating board 1. The floating board 1 is a detachable and spliced structure, composed of a number of unit boards connected together. The material is high-density polyethylene. The surface of the floating board 1 is provided with diversion grooves to enhance water circulation. The number of unit boards is connected and fixed by bolts. As a specific embodiment, the unit board is a circular ring structure, and there is a gap between adjacent unit boards. The limiting mechanism 2 is arranged through the gap. The limiting mechanism 2 includes an oval rod 3 passing through the gap between adjacent units. A tapered portion 7 is provided at the lower end of the oval rod 3. The tapered portion 7 is more likely to be inserted into the mud of the riverbed, thus facilitating the fixation of the oval rod 3.

[0027] Embodiment 2 See Figures 1 - 5, A river water purification system based on ecological restoration, including an ecological restoration unit. The ecological restoration unit includes an ecological floating island module. The ecological floating island module includes a floating board 1, aquatic plants planted on the floating board 1, and a microbial carrier suspended below the floating board 1. The microbial carrier is a modified polyurethane porous material with a porosity of 80%-90%. A number of limiting mechanisms 2 for limiting the floating island module are provided on the floating board 1; The floating board 1 is a detachable and spliced structure, composed of a number of unit boards connected. The material is high-density polyethylene. The surface of the floating board 1 is provided with diversion grooves to enhance water circulation. The number of unit boards is connected and fixed by bolts. As a specific embodiment, the unit board is a circular ring structure, and there is a gap between adjacent unit boards. The limiting mechanism 2 is arranged through the gap; The limiting mechanism 2 includes an oval rod 3 passing through the gap between adjacent units. A tapered portion 7 is provided at the lower end of the oval rod 3. The tapered portion 7 is more likely to be inserted into the mud of the riverbed, so as to easily fix the oval rod 3.

[0028] The tapered portion 7 includes a cylindrical section 25. A conical pointed head 26 is provided on one end face of the cylindrical section 25. Three groups of through holes 28 are evenly arranged along the circumference on the other end face of the cylindrical section 25. The three groups of through holes 28 penetrate the outer side surface of the pointed head 26. Air bags 27 are arranged in the three groups of through holes 28. The opening of the air bag 27 is turned outwards and fixed on the corresponding end face of the cylindrical section 25. The specific fixing method can be gluing. Three groups of round tubes 24 matching the through holes 28 are provided on the lower end face of the oval rod 3. The free end of the round tube 24 is provided with a round chamfer, so that it can be stuck at the opening of the air bag 27 to achieve sealing after connection. A long oval hole is arranged inside the oval rod 3. The long oval hole is communicated with the three groups of round tubes 24. An air charging pipe 10 communicated with the long oval hole is provided on the outer side surface of the oval rod 3 near the upper end face. High-pressure air is filled through the air charging pipe 10. The high-pressure air enters the air bag 27 after passing through the long oval hole and the round tube 24. Then the air bag 27 expands downward and presses the riverbed downward, so as to provide an upward reaction force for the oval rod 3. In this way, it is easy to pull out the oval rod 3, so as to facilitate the adjustment of the position of the floating island.

[0029] External threads are arranged on the periphery of the cylindrical section 25. A sleeve 6 is movably sleeved on the periphery of the oval rod 3 near the lower end face. Internal threads matching the external threads are arranged on the inner wall of the sleeve 6. A limiting ring 23 is arranged on the periphery of the oval rod 3 near the lower end face. A limiting ring 2 is arranged inside the upper end of the corresponding sleeve 6 to cooperate with the limiting ring 23. After the three groups of round tubes 24 are stuck at the openings of the three groups of air bags 27, slide down the sleeve 6 and rotate it to be screwed on the tapered portion 7 until the limiting ring 23 and the limiting ring 2 are pressed against each other tightly. At this time, the free end of the round tube 24 will be pressed tightly and sealed at the opening of the air bag 27.

[0030] An auxiliary fixing mechanism is also arranged on the periphery of the oval rod 3. The auxiliary fixing mechanism includes a circular tube two 4 slidably sleeved on the periphery of the oval rod 3. A pair of long sliding grooves 9 are arranged on the periphery of the oval rod 3, and a pair of long sliding rods cooperating with the long sliding grooves 9 are arranged on the inner wall of the corresponding circular tube two 4. The long sliding rods are slidably arranged in the long sliding grooves 9, and the up-and-down sliding of the circular tube two 4 along the oval rod 3 is realized through the cooperation of the long sliding rods and the long sliding grooves 9; A large bevel gear 11 is rotatably arranged on the periphery of the circular tube two 4. Three groups of support rods one 19 are evenly arranged along the circumference on the periphery of the circular tube two 4 below the large bevel gear 11. Gripping mechanisms are arranged on all the three groups of support rods one 19.

[0031] The gripping mechanism includes a cross bar 21 arranged at the free end of the support rod one 19. A T-shaped sliding groove penetrating through the front and back is arranged on the cross bar 21. A T-shaped sliding block 22 is slidably arranged in the T-shaped sliding groove. A long strip plate 17 is arranged on the T-shaped sliding block 22. A through long groove 18 is arranged on one side of the upper surface of the long strip plate 17. A special-shaped elastic plate 16 is arranged on the upper surface of the long strip plate 17. The special-shaped elastic plate 16 includes a short plate fixed on the other side of the upper surface of the long strip plate 17. An inclined plate is arranged on the side of the short plate facing the long groove 18. A long plate is arranged at the free end of the inclined plate. A gripping floor cooperating with the long groove 18 is vertically arranged at the free end of the long plate. The gripping floor will penetrate through the long groove 18 during operation and then be inserted into the riverbed soil below the long strip plate 17.

[0032] The gripping mechanism further includes a support rod two 20 arranged on the support rod one 19. A rotating shaft 13 is arranged on the support rod two 20. A small bevel gear 12 meshing with the large bevel gear 11 is arranged at one end of the rotating shaft 13. A sector wheel 14 is arranged at the other end of the rotating shaft 13. The outer arc surface of the sector wheel 14 farthest from the axis of the rotating shaft 13 cooperates with the upper surface of the long plate. That is, when the sector wheel 14 rotates, the outer arc surface presses on the long plate, so that the gripping floor penetrates through the long groove 18 and is inserted into the soil of the riverbed. A circular shaft one is arranged on the sector wheel 14, and the circular shaft one is close to the inner arc surface of the sector wheel 14 closest to the axis of the rotating shaft 13. A circular shaft two is arranged on the upper surface of the long strip plate 17 close to the short plate. A connecting rod 15 is movably connected between the circular shaft one and the circular shaft two. That is, one end of the connecting rod 15 is rotatably arranged on the periphery of the circular shaft one, and the other end of the connecting rod 15 is rotatably arranged on the periphery of the circular shaft two. Due to the action of the connecting rod 15, during the process of the sector wheel 14 pressing down the special-shaped elastic plate 16, the long strip plate 17 will slide backward, so that the gripping floor makes a backward sliding movement while being inserted into the soil, further enhancing the gripping effect, and thus further enhancing the auxiliary fixation of the whole device.

[0033] A handle is arranged on the periphery of the upper end of the circular tube two 4. The circular tube two 4 can be slid up and down through the handle. After the lower end of the oval rod 3 is inserted into the riverbed, the circular tube two 4 is pressed down through the handle, so that the long strip plate 17 is pressed tightly on the riverbed, and then the auxiliary fixation is further realized through the gripping mechanism; There is a circular tube three 5 arranged around the periphery of the circular tube two 4. The lower end of the circular tube three 5 is fixed on the large bevel gear 11, and a rotating handle 8 is arranged at the upper end of the circular tube three 5. The large bevel gear 11 can be rotated by rotating the rotating handle 8.

[0034] Application principle of the limiting mechanism 2: During application, first insert the lower end of the long round rod 3 into the soil of the riverbed, and then press down the circular tube two 4 through the handle, so that the long strip plate 17 is pressed tightly on the riverbed. Then rotate the handle to make the large bevel gear 11 rotate. Then the large bevel gear 11 will drive three small bevel gears 12 to rotate, thereby driving the corresponding sector wheels 14 to rotate. When the outer arc surface of the sector wheel 14 presses on the special-shaped elastic plate 16, the gripping floor of the special-shaped elastic plate 16 will pass through the long slot 18 and insert into the soil of the riverbed, so as to realize the auxiliary fixation of the long round rod 3 and further realize the fixation of the floating island. When it is necessary to move the position of the floating island, first rotate the large bevel gear 11 through the handle, so that the outer arc surface of the sector wheel 14 leaves the special-shaped elastic plate 16. Then the gripping floor will leave the soil on the riverbed under the action of the self-elastic force of the special-shaped elastic plate 16. Then, high-pressure air is filled through the air charging pipe 10, and the inflation of the airbag 27 provides an upward reaction force for the long round rod 3, so as to realize the easy removal of the whole device.

[0035] Embodiment 3 See Figures 1 - 5 , a river water purification system based on ecological restoration, including an ecological restoration unit. The ecological restoration unit includes an ecological floating island module. The ecological floating island module includes a floating board 1, aquatic plants planted on the floating board 1, and microbial carriers suspended below the floating board 1. The microbial carriers are modified polyurethane porous materials with a porosity of 80%-90%. A number of limiting mechanisms 2 for limiting the floating island module are arranged on the floating board 1. The floating board 1 is a detachable splicing structure, which is composed of a number of unit boards connected. The material is high-density polyethylene. The surface of the floating board 1 is provided with a diversion groove to enhance water body circulation. The number of unit boards is connected and fixed by bolts. As a specific embodiment, the unit board is a circular ring structure, and there is a gap between adjacent unit boards. The limiting mechanism 2 is arranged through the gap. The limiting mechanism 2 includes a long round rod 3 passing through the gap between adjacent units. A conical part 7 is arranged at the lower end of the long round rod 3. The conical part 7 is easier to insert into the soil of the riverbed, so as to facilitate the fixation of the long round rod 3.

[0036] The conical part 7 includes a cylindrical section 25. On one end face of the cylindrical section 25, there is a conical pointed tip 26. On the other end face of the cylindrical section 25, three groups of through holes 28 are evenly arranged along the circumference. The three groups of through holes 28 penetrate the peripheral side surface of the pointed tip 26. Air bags 27 are arranged in the three groups of through holes 28. The openings of the air bags 27 are turned outwards and fixed on the corresponding end faces of the cylindrical section 25. The specific fixing method can be gluing. On the lower end face of the oval rod 3, there are three groups of first round tubes 24 that cooperate with the through holes 28. The free ends of the first round tubes 24 are provided with round chamfers, so that they can be stuck at the openings of the air bags 27 to achieve sealing after connection. There is an oval hole inside the oval rod 3, and the oval hole communicates with the three groups of first round tubes 24. An inflatable tube 10 communicating with the oval hole is arranged on the outer side surface of the oval rod 3 near the upper end face. High-pressure air is filled through the inflatable tube 10. The high-pressure air enters the air bag 27 after passing through the oval hole and the first round tube 24. Then the air bag 27 expands downwards and presses the riverbed downwards, thereby providing an upward reaction force to the oval rod 3. In this way, it is easy to pull out the oval rod 3, so as to facilitate the adjustment of the position of the floating island.

[0037] External threads are arranged on the periphery of the cylindrical section 25. A sleeve 6 is movably sleeved on the periphery of the oval rod 3 near the lower end face. Internal threads matching the external threads are arranged on the inner wall of the sleeve 6. A first limiting ring 23 is arranged on the periphery of the oval rod 3 near the lower end face. Correspondingly, a second limiting ring matching the first limiting ring 23 is arranged inside the upper end of the sleeve 6. After the three groups of first round tubes 24 are stuck at the openings of the three groups of air bags 27, slide down the sleeve 6 and rotate it to make it screwed on the conical part 7 until the first limiting ring 23 and the second limiting ring are pressed against each other tightly. At this time, the free ends of the first round tubes 24 will tightly press and seal at the openings of the air bags 27.

[0038] An auxiliary fixing mechanism is also arranged on the periphery of the oval rod 3. The auxiliary fixing mechanism includes a second round tube 4 slidably sleeved on the periphery of the oval rod 3. A pair of long sliding grooves 9 are arranged on the periphery of the oval rod 3. Correspondingly, a pair of long sliding rods matching the long sliding grooves 9 are arranged on the inner wall of the second round tube 4. The long sliding rods are slidably arranged in the long sliding grooves 9. The up and down sliding of the second round tube 4 along the oval rod 3 is realized through the cooperation of the long sliding rods and the long sliding grooves 9; A large bevel gear 11 is rotatably arranged on the periphery of the second round tube 4. Three groups of first support rods 19 are evenly arranged along the circumference on the periphery of the second round tube 4 below the large bevel gear 11. Gripping mechanisms are arranged on the three groups of first support rods 19.

[0039] The ground gripping mechanism includes a cross bar 21 arranged at the free end of the first support rod 19. A T-shaped sliding groove penetrating through the front and back is arranged on the cross bar 21. A T-shaped slider 22 is slidably arranged in the T-shaped sliding groove. A long strip plate 17 is arranged on the T-shaped slider 22. A through long groove 18 is arranged on one side of the upper surface of the long strip plate 17. A special-shaped elastic plate 16 is arranged on the upper surface of the long strip plate 17. The special-shaped elastic plate 16 includes a short plate fixed on the other side of the upper surface of the long strip plate 17. An inclined plate is arranged on the side of the short plate facing the long groove 18. A long plate is arranged at the free end of the inclined plate. A ground gripping plate cooperating with the long groove 18 is vertically arranged at the free end of the long plate. The ground gripping plate will penetrate through the long groove 18 during operation and then insert into the riverbed soil below the long strip plate 17.

[0040] The ground gripping mechanism further includes a second support rod 20 arranged on the first support rod 19. A rotating shaft 13 is arranged on the second support rod 20. A small bevel gear 12 meshing with the large bevel gear 11 is arranged at one end of the rotating shaft 13. A sector wheel 14 is arranged at the other end of the rotating shaft 13. The outer arc surface of the sector wheel 14 farthest from the axis of the rotating shaft 13 cooperates with the upper surface of the long plate. That is, when the sector wheel 14 rotates, the outer arc surface presses on the long plate, so that the ground gripping plate passes through the long groove 18 and inserts into the soil of the riverbed. A first round shaft is arranged on the sector wheel 14, and the first round shaft is close to the inner arc surface of the sector wheel 14 closest to the axis of the rotating shaft 13. A second round shaft is arranged on the upper surface of the long strip plate 17 close to the short plate. A connecting rod 15 is movably connected between the first round shaft and the second round shaft. That is, one end of the connecting rod 15 is rotatably arranged around the first round shaft, and the other end of the connecting rod 15 is rotatably arranged around the second round shaft. Due to the action of the connecting rod 15, during the process of the sector wheel 14 pressing down the special-shaped elastic plate 16, the long strip plate 17 will slide backward, so that the ground gripping plate makes a backward sliding movement while inserting into the soil, further enhancing the ground gripping effect, and thus further enhancing the auxiliary fixation of the whole device.

[0041] A handle is arranged on the outer periphery of the upper end of the second round tube 4. The second round tube 4 can be slid up and down through the handle. After the lower end of the long round rod 3 is inserted into the riverbed, the second round tube 4 is pressed down through the handle to make the long strip plate 17 press tightly on the riverbed, and then the auxiliary fixation is further realized through the ground gripping mechanism; A third round tube 5 is movably arranged on the outer periphery of the second round tube 4. The lower end of the third round tube 5 is fixed on the large bevel gear 11. A rotating handle 8 is arranged at the upper end of the third round tube 5. The large bevel gear 11 can be rotated through the rotating handle 8.

[0042] Application principle of the limiting mechanism 2: During application, first insert the lower end of the oval rod 3 into the mud of the riverbed. Then, press down the second round tube 4 through the handle, so that the long strip plate 17 is pressed tightly against the riverbed. After that, rotate the handle to make the large bevel gear 11 rotate. Then, the large bevel gear 11 will drive the three small bevel gears 12 to rotate, thereby driving the corresponding sector wheels 14 to rotate. When the outer arc surface of the sector wheel 14 presses on the special-shaped elastic plate 16, the gripping floor of the special-shaped elastic plate 16 will pass through the long slot 18 and insert into the mud of the riverbed, thereby realizing the auxiliary fixation of the oval rod 3 and further realizing the fixation of the floating island. When it is necessary to move the position of the floating island, first rotate the large bevel gear 11 through the handle, so that the outer arc surface of the sector wheel 14 leaves the special-shaped elastic plate 16. Then, the gripping floor will leave the mud on the riverbed under the action of the self-elastic force of the special-shaped elastic plate 16. After that, high-pressure air is filled through the air charging pipe 10, and the inflation of the airbag 27 provides an upward reaction force for the oval rod 3, thereby realizing the easy removal of the entire device.

[0043] It also includes a pretreatment unit, which is arranged upstream of the river course and is used to intercept large particle suspended matters and regulate the water flow. The ecological restoration unit also includes a composite constructed wetland module and a biofilm carrier module arranged along the river course, which are used to remove pollutants through plant absorption, microbial degradation and physical adsorption. The ecological restoration unit is arranged downstream of the pretreatment unit.

[0044] The pretreatment unit includes a grille and a sedimentation tank. The aperture of the grille is 5 - 10 mm. Porous ceramsite is filled in the sedimentation tank to adsorb heavy metal ions. The grille is usually located at the forefront of the pretreatment unit and is used to intercept large floating matters (such as branches and garbage) and coarse particle suspended matters in the water body, protecting the subsequent treatment equipment from being blocked. The process of the pretreatment unit is usually to remove large particle sundries through the grille first, and then enter the sedimentation tank to precipitate fine particles. The composite constructed wetland module consists of a substrate layer, an emergent plant layer and a submerged plant layer. Among them, the substrate layer includes a mixture of zeolite, volcanic rock and biochar with a mass ratio of 3:2:1; the emergent plant layer includes reed, cattail and calamus with a planting density of 10 - 15 plants / m²; the submerged plant layer includes vallisneria natans, ceratophyllum demersum and myriophyllum verticillatum with a coverage rate of 60% - 80%. The biofilm carrier module is a three-dimensional network structure, with a composite bacterium agent loaded on the surface, including nitrifying bacteria, denitrifying bacteria and photosynthetic bacteria, and the density of the bacterium agent is 10 6 -10 8 CFU / g.

[0045] It also includes a sediment remediation unit, which consists of a sediment solidifying agent and a benthic organism placement layer. The benthic organism placement layer includes snails, mussels and chironomid larvae, and the placement density is 50 - 100 individuals / m².

[0046] The technical features not described in the present invention can be realized by or adopted from the prior art, and will not be elaborated herein. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those of ordinary skill in the art within the scope of the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. A river water purification system based on ecological restoration, characterized in that: It comprises an ecological restoration unit, the ecological restoration unit comprises an ecological floating island module, the ecological floating island module comprises a floating board (1), aquatic plants planted on the floating board (1) and a microorganism carrier suspended below the floating board (1), and the floating board (1) is provided with a plurality of limiting mechanisms (2) for limiting the floating island module; The limiting mechanism (2) comprises a long round rod (3) passing through the gap between adjacent units, and a tapered portion (7) is provided at the lower end of the long round rod (3).

2. The river water purification system based on ecological restoration according to claim 1 is characterized in that: The conical portion (7) comprises a cylindrical section (25), one end face of which is provided with a conical tip (26), and the other end face of which is provided with three groups of through holes (28) evenly arranged along the circumference, the three groups of through holes (28) penetrating the outer side face of the tip (26), air bags (27) being arranged in the three groups of through holes (28), the openings of the air bags (27) being turned outward and fixed on the corresponding end faces of the cylindrical section (25), three groups of round tubes (24) cooperating with the through holes (28) being arranged on the lower end face of the long round rod (3), an oblong hole being arranged inside the long round rod (3), the oblong hole being connected with the three groups of round tubes (24), and an inflation tube (10) being connected with the oblong hole being arranged on the outer side face of the long round rod (3) close to the upper end face.

3. The river water purification system based on ecological restoration according to claim 2 is characterized in that: The cylindrical section (25) is provided with an external thread on the periphery, the outer movable sleeve of the long round rod (3) near the lower end face is provided with a sleeve (6), the inner wall of the sleeve (6) is provided with an internal thread that cooperates with the external thread, the outer periphery of the long round rod (3) near the lower end face is provided with a limit ring 1 (23), and the corresponding upper end of the sleeve (6) is provided with a limit ring 2 that cooperates with the limit ring 1 (23).

4. The river water purification system based on ecological restoration according to claim 3 is characterized in that: The outer periphery of the long round rod (3) is also provided with an auxiliary fixing mechanism, and the auxiliary fixing mechanism comprises a second round tube (4) slidably sleeved on the outer periphery of the long round rod (3), and a pair of long sliding grooves (9) are provided on the outer periphery of the long round rod (3), and a pair of long sliding rods cooperating with the long sliding grooves (9) are correspondingly provided on the inner wall of the second round tube (4), and the long sliding rods are slidably arranged in the long sliding grooves (9); A large bevel gear (11) is rotatably arranged on the periphery of the circular tube 2 (4), and three groups of support rods (19) are evenly arranged along the circumference on the periphery of the circular tube 2 (4) below the large bevel gear (11), and the three groups of support rods (19) are all provided with a gripping mechanism.

5. The river water purification system based on ecological restoration according to claim 4 is characterized in that: The gripping mechanism comprises a cross bar (21) arranged at the free end of the bracket rod (19), the cross bar (21) is provided with a T-shaped sliding groove extending through the front and rear, a T-shaped sliding block (22) is slidably arranged in the T-shaped sliding groove, a long strip plate (17) is arranged on the T-shaped sliding block (22), a through long groove (18) is arranged on one side of the upper side of the long strip plate (17), a special-shaped elastic plate (16) is arranged on the upper side of the long strip plate (17), the special-shaped elastic plate (16) comprises a short plate fixed on the other side of the upper side of the long strip plate (17), an inclined plate is arranged on the side of the short plate facing the long groove (18), a long plate is arranged at the free end of the inclined plate, and a gripping plate matching the long groove (18) is vertically arranged at the free end of the long plate.

6. The river water purification system based on ecological restoration according to claim 5 is characterized in that: The gripping mechanism further comprises a support rod 2 (20) arranged on the support rod 1 (19), a rotating shaft (13) being arranged on the support rod 2 (20), a small bevel gear (12) meshing with the large bevel gear (11) being arranged at one end of the rotating shaft (13), a sector wheel (14) being arranged at the other end of the rotating shaft (13), an outer arc surface of the sector wheel (14) farthest from the axis of the rotating shaft (13) cooperating with the upper side surface of the long board, a circular shaft 1 being arranged on the sector wheel (14), an inner arc surface of the circular shaft 1 close to the axis of the sector wheel (14) close to the axis of the rotating shaft (13), a circular shaft 2 being arranged on the upper side surface of the long board (17) close to the short board, a connecting rod (15) being movably connected between the circular shaft 1 and the circular shaft 2.

7. The river water purification system based on ecological restoration according to claim 6 is characterized in that: A handle is disposed on the outer periphery of the upper end of the second circular tube (4); A circular tube three (5) is movably arranged on the periphery of the circular tube two (4), the lower end of the circular tube three (5) is fixed on the large bevel gear (11), and a rotating handle (8) is arranged on the upper end of the circular tube three (5).

8. The river water purification system based on ecological restoration according to claim 1 is characterized in that: It also includes a pre-processing unit, which is arranged upstream of the river; The ecological restoration unit also includes a composite artificial wetland module and a biofilm carrier module arranged along the river channel, and the ecological restoration unit is arranged downstream of the pretreatment unit.

9. The river water purification system based on ecological restoration according to claim 1 is characterized in that: The pretreatment unit includes a grid and a sedimentation tank; The composite artificial wetland module is composed of a matrix layer, an emergent plant layer and a submerged plant layer; The biofilm carrier module is a three-dimensional network structure, and the surface is loaded with composite bacterial agents, including nitrifying bacteria, denitrifying bacteria and photosynthetic bacteria.

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