Deep well pressurized coupling open type gillnet ecological algae control system and maintenance method thereof

Abstract

This invention relates to a deep-well pressurized coupled open-type enclosure ecological algae control system and its maintenance method. Enclosures are set up upstream and downstream of areas where dense algae residue has formed a sedimentation zone in the water body. These two enclosures, together with the riverbed, form an open ecological zone. The algae control well is located at the front end of the upstream enclosure. Blue-green algae enters the well from the inlet of the inner cylinder, loses its buoyancy after being subjected to hydrostatic pressure, and then a flow-propelling device pumps the algae-laden water through the return channel between the outer and inner cylinders into the water body of the ecological zone. The blue-green algae disperses in the water, and filter-feeding fish and benthic organisms filter-feed the algae residue throughout the ecological zone, resulting in high algae residue treatment efficiency. A trolley device moves a driving net from a first position to a second position on the track. The driving net, with its shape conforming to the water body cross-section and utilizing the fish's upstream swimming habits, drives adult fish from downstream to upstream. An air-floating net cage inflates and floats, enclosing the driving net and the fish within a second net body, saving costs and achieving high automated capture efficiency.

Description

Technical Field

[0001] This invention relates to the field of cyanobacteria control technology, and in particular to a deep-well pressurized coupled open-net ecological algae control system and its maintenance method. Background Technology

[0002] For areas with densely suspended algae in water bodies, silver carp and bighead carp are typically placed in net cages. These fish are filter feeders with unique feeding characteristics, digestive mechanisms, and stable community structures. They can filter phytoplankton ranging from 10 μm to several millimeters, effectively consuming cyanobacteria and thus controlling cyanobacterial blooms. However, due to the limitations of the net cages, silver carp and bighead carp can only filter algae within the cage area, primarily feeding on planktonic algae. They cannot effectively treat algae in the entire densely suspended algae sedimentation zone, especially the algae settled at the bottom, resulting in low algae treatment efficiency.

[0003] Meanwhile, when net cages are not used, controlling and harvesting the biomass of filter-feeding fish and filter-feeding benthic organisms in the densely suspended sedimentation zone of algae residue will become a major challenge.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] To address the shortcomings of existing technologies, embodiments of the present invention disclose a deep well pressurized coupled open-net ecological algae control system and its maintenance method.

[0006] The technical solution adopted in this invention is as follows: A deep-well pressurized coupled open-net ecological algae control system includes: two fences positioned upstream and downstream in a nearly straight section of water; filter-feeding fish and benthic organisms placed in the water between the two fences; two tracks erected on the left and right banks of the water body between the two fences; a traveling device spanning the water body and mounted on the two tracks, capable of moving along the tracks; a first winch and a second winch mounted on the traveling device; two first winches positioned in front of the second winch; a first rope wound on the first winch; and a repellent net shaped to fit the cross-section of the water body, with the upper end of the net floating on the surface and the lower end submerged. The first pull rope connects the upper and lower ends of the two sides of the driving net, which is in the water and close to the riverbed. The driving net is a pouch-shaped structure that bulges towards the rear end and is pulled by the first pull rope. The second pull rope passes through the driving net and is connected to the lower end of the driving net. An air-floating net box is set in the water upstream between the two fences. The air-floating net box includes a box-shaped second net body and a ring of air bladders set at the upper end of the second net body. The air bladders are in an uninflated state, and the air-floating net box is submerged at the bottom of the riverbed. The traveling device moves from the downstream side of the track to the upstream side, and the driving net moves above the air-floating net box. The air bladders inflate, causing the second net body to float up, enclosing the driving net and the fish in the second net body. The second winch is configured to wind up the second pull rope, folding and gathering the driving net until the driving net rises above the water surface.

[0007] A further technical solution is as follows: the deep well pressurized coupled open-type enclosure ecological algae control system includes a gantry frame, which is horizontally installed on the left and right banks of the water body and located between two enclosures. The tracks are installed on the left and right sides of the upper end of the gantry frame. The traveling device includes: two car bodies, each installed on one of the two tracks. Two rollers are rotatably installed at the lower end of the car bodies. The rollers on the downstream side of the two car bodies are connected by a rotating shaft. A first I-beam and a second I-beam are installed between the upper ends of the two car bodies. The second I-beam is located at the front end of the first I-beam. A first winch is installed on the car body, and a second winch is installed on the second I-beam. A power mechanism is installed on the upper end of the first I-beam and is configured to drive the rotating shaft to rotate.

[0008] A further technical solution is that a first sprocket is fixedly sleeved in the middle of the rotating shaft, the power mechanism includes a motor, the motor is fixed on the first I-beam, a second sprocket is provided at the output end of the motor, and a chain is sleeved on the first sprocket and the second sprocket.

[0009] A further technical solution is that the water body cross-section is an inverted isosceles trapezoid; the driving net is sheet-like, including a first upper line, a first lower line, and two first side lines, the two first side lines being connected to the two ends between the first upper line and the first lower line respectively; the first upper line and the first lower line being respectively located at the upper and lower ends of the first net body; the two first side lines being respectively located at the left and right ends of the first net body; a first float being set on the first upper line; a first sinker being set on the first lower line; the shape of the first net body matching the shape of the water body cross-section; the first pull rope being connected to the end of the first upper line and the upper end of the first side lines; and the second pull rope passing through the first net body and connecting to the first lower line.

[0010] A further technical solution is that the second winch has three units, which are spaced apart at the upper end of the second I-beam along the length of the second I-beam. The middle second winch is located at the rear end of the second I-beam, and the other two second winches are located at the front end of the second I-beam.

[0011] A further technical solution is as follows: the air-floating net cage includes a second upper line, a second lower line, and a second side line. The second upper line is located at the upper end of the second net body, the second lower line is located at the lower end of the second net body, and the second side line is located on the side of the second net body, with its upper and lower ends respectively connected to the second upper line and the second lower line. An air bladder is installed on the second upper line, and an air compressor is installed on the bank. The air compressor is connected to the air bladder through an air pipe. A second sinker is installed on the second lower line. The shape of the second net body matches the cross-sectional shape of the water body, and its front end is close to the fence. Top rings are also connected at intervals on the second upper line. A third pull rope passes through the top rings, and second end rings are installed at both ends of the third pull rope. The second end rings are located between two adjacent top rings on the side closer to the bank.

[0012] A further technical solution is that guide rings are spaced apart along the length of the second side line, and a fixing pin is set on the bank. The position of the fixing pin corresponds to the guide ring. The guide rope passes through the guide ring, with one end connected to the fixing pin and the other end connected to the second lower line. The part of the guide rope in the water is close to the waist of the riverbed.

[0013] A further technical solution is that a first end ring is provided at the end of the first pull rope and the second pull rope, and a steel cable is wound on the first winch and the second winch. A self-locking hook is provided at the end of the steel cable, and the self-locking hook hooks the first end ring.

[0014] A further technical solution is that the deep well pressurized coupled open enclosure ecological algae control system also includes an algae control well, the location of which corresponds to the front end of the upstream enclosure. The algae control well includes an outer cylinder and an inner cylinder. The lower end of the outer cylinder is buried at the bottom of the riverbed. The inner cylinder is nested inside the outer cylinder, and the upper end of the inner cylinder passes through the upper end of the outer cylinder. A return channel is formed between the outer cylinder and the inner cylinder. The upper end of the inner cylinder has a water inlet, which is submerged below the water surface. A flow-pushing device is installed on the side of the outer cylinder. One end of the flow-pushing device is connected to the return channel, and the other end passes through the enclosure and connects to the water between the two enclosures. The flow-pushing device pumps the algae water that falls into the algae control well out through the return channel into the water between the two enclosures.

[0015] A further technical solution is that the fence includes: pipe piles inserted into the riverbed; a frame disposed between adjacent pipe piles, with the lowest part of the frame buried in the riverbed and the upper part of the frame above the water surface; a net laid on both sides of the frame; the filter-feeding fish include silver carp, bighead carp, and gudgeon, and the filter-feeding benthic organisms include freshwater mussels and snails; the stocking ratio of silver carp to bighead carp is 2:1, and the stocking amount of silver carp and bighead carp is 130g / m³. 2 The amount of gudgeon released was 30g / m³. 2 The amount of freshwater mussels released was 35g / m³. 2 The amount of snails added was 50g / m³. 2 .

[0016] The maintenance method for the aforementioned deep well pressurized coupled open-net ecological algae control system includes the following steps: Preparation: Connect the two sides of the driving net to the first winch via the first pull rope, and connect the lower end of the driving net to the second winch via the second pull rope. At this time, the traveling device is in the first position, the upper end of the driving net floats on the water surface, and the lower end of the driving net sinks into the water and is close to the bottom of the riverbed. At the same time, sink the uninflated air-floating net cage between the two fences and close to the bottom of the riverbed upstream. Driving fish: The traveling device moves the driving net from the first position to the second position. The driving net drives the adult fish in the water between the two fences to the upstream, and at this time the driving net is above the air-floating net cage. Air-floating fish encirclement: The air bladder is inflated, which causes the second net to float up, encircling the driving net and the adult fish school into the second net; Net repositioning: The second winch winds up the second rope, folding and gathering the driving net. After the driving net is folded and gathered, it is located above the water surface. The traveling device moves the driving net from the second position to the first position, and then pulls the air-floating net cage ashore.

[0017] The beneficial effects of the embodiments of the present invention are as follows: (I) The deep-well pressurized coupled open-type enclosure net ecological algae control system of this invention sets up enclosure nets upstream and downstream of the densely suspended sedimentation zone of algae in the water body. The two enclosure nets and the riverbed form an open ecological zone. Filter-feeding fish and filter-feeding benthic organisms filter the algae in the entire ecological zone, resulting in high algae treatment efficiency. At the same time, the filter-feeding benthic organisms can also filter fish excrement, forming a three-dimensional ecological treatment, further reducing the eutrophication level of the water body, preventing the occurrence of cyanobacterial blooms, and achieving good water treatment results.

[0018] (II) Furthermore, the driving net is moved from the first position to the second position on the track by a traveling device. The driving net, with its shape conforming to the water body cross-section and utilizing the fish's upstream swimming habits, drives the adult fish from downstream to upstream. At this point, the adult fish are located between the upstream fence and the driving net, which is positioned above the air-floating net cage submerged at the bottom of the riverbed. The air-floating net cage inflates and floats, enclosing the driving net and the fish within the second net. As the air-floating net cage rises, no gaps are created between it and the driving net, preventing the fish from escaping. There is also no need for a docking structure between the driving net and the net cage, saving costs while ensuring capture efficiency. The second winch winds up the second pull rope, folding and retracting the driving net until it rises above the water surface, avoiding interference when pulling the air-floating net cage later. The structure is ingeniously designed and highly automated.

[0019] (III) Furthermore, guide rings are spaced apart along the length of the second side line, and fixing pins are installed on the bank, with the fixing pins corresponding to the guide rings. A guide rope passes through the guide rings, with one end connected to the fixing pin and the other end connected to the second lower line. The portion of the guide rope in the water is close to the waist of the riverbed. When the air-floating net cage sinks, the length of the guide rope is just enough for the side of the second net to sink to the bottom of the riverbed along the guide rope. When the air-floating net cage rises, its side can rise along the guide rope, reducing the possibility of fish escaping through the gap between the second net and the riverbed, thus improving capture efficiency. Attached Figure Description

[0020] Figure 1 This is a top view schematic diagram of the deep well pressurized coupling open enclosure ecological algae control system of the present invention.

[0021] Figure 2 This is a schematic diagram of the fence structure in the deep well pressurized coupling open-type enclosure ecological algae control system of the present invention.

[0022] Figure 3 This is a front view structural diagram of the deep well pressurized coupling open enclosure ecological algae control system of the present invention, with the traveling device in the first position at this time.

[0023] Figure 4 This is a side view of the deep well pressurized coupling open enclosure ecological algae control system of the present invention, with the traveling device in the second position at this time.

[0024] Figure 5 This is a schematic diagram of the structure of the first pull rope in the deep well pressurized coupling open enclosure ecological algae control system of the present invention.

[0025] Figure 6 This is a front view of the deep well pressurized coupling open enclosure ecological algae control system of the present invention, with the traveling device in the second position at this time.

[0026] Figure 7 This is a schematic diagram of the structure of the barrier net and the algae control well in the deep well pressurized coupling open enclosure ecological algae control system of the present invention.

[0027] Figure 8 This is an isometric view of the rake net in the deep well pressurized coupled open enclosure ecological algae control system of the present invention.

[0028] In the picture: 1. Gantry frame; 11. Track; 12. Limiting rod; 2. Car body; 21. First I-beam; 22. Second I-beam; 23. Roller; 24. Shaft; 241. Second sprocket; 25. Shaft body; 26. Bearing housing; 27. Coupling; 3. Power mechanism; 31. Motor; 311. First sprocket; 32. Chain; 4. First winch; 5. Second winch; 6. Driving net; 61. First upper line; 611. First float; 62. First lower line; 621. First sinker; 63. First side line; 64. First net body; 65. First pull rope; 651. First end ring; 652. Self-locking hook; 66. 7. Second pull rope; 7. Air-floating net cage; 71. Second upper rope; 711. Airbag; 712. Top ring; 72. Second lower rope; 721. Second sinker; 73. Second side rope; 731. Fixing pin; 732. Guide ring; 733. Guide rope; 74. Second net body; 75. Third pull rope; 751. Second end ring; 76. Air compressor; 8. Water body; 9. Fence; 91. Pipe pile; 92. Frame; 93. Barrier net; 10. Rake net; 101. Net frame; 102. Net bag; 103. Rake body; 13. Algae control well; 131. Outer cylinder; 132. Inner cylinder; 133. Water inlet; 134. Flow propulsion device. Detailed Implementation

[0029] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0030] Example: This embodiment discloses a deep well pressurized coupled open enclosure ecological algae control system.

[0031] The deep well pressurized coupled open-type enclosure ecological algae control system includes an enclosure 9, a track 11, a first winch 4, a second winch 5, a driving net 6, and an air-floating net cage 7.

[0032] like Figure 1 As shown, there are two enclosures 9, set in the upstream and downstream of the nearly straight water body 8, and filter-feeding fish and filter-feeding benthic organisms are placed in the water body 8 between the two enclosures 9.

[0033] like Figure 1 and Figure 2 As shown, exemplarily, the water body 8 is a river or channel. The fence 9 includes pipe piles 91, a frame 92, and a net 93. The pipe piles 91 are inserted into the riverbed. The frame 92 is set between adjacent pipe piles 91, with the lowermost part of the frame 92 buried in the riverbed, and the upper part of the frame 92 above the surface of the water body 8. The net 93 is laid on both sides of the frame 92. Specifically, the pipe piles 91 are made of rigid seamless steel pipes with diameters of 32.5cm and 11cm. The frame 92 is enclosed by rigid seamless steel pipes with a diameter of 8cm, and a gabion mesh is set inside the frame 92 to prevent water erosion and to provide support for the net 93. The net 93 has a mesh diameter of 3cm. The net 93 prevents fish from escaping from the ecological zone and also acts as a buffer against cyanobacteria in the water body 8, while the 3cm mesh diameter does not obstruct the flow of water in the body 8. Filter-feeding fish include silver carp, bighead carp, and gudgeon; filter-feeding benthic organisms include freshwater mussels and snails. The stocking ratio of silver carp to bighead carp is 2:1, and the stocking density of both species is 130 g / m³. 2 The amount of gudgeon released was 30g / m³. 2 The stocking density of freshwater mussels was 35g / m³. 2 The amount of snails released was 50g / m³. 2 Silver carp and bighead carp feed on algae residue in the water, while gudgeon, a bottom-dwelling fish, consumes the excrement of silver carp and bighead carp. The excrement of gudgeon is then consumed by spirilla and triangular clams. This three-dimensional ecological management reduces the eutrophication level of water body 8, prevents cyanobacterial blooms, and achieves good treatment results for water body 8. After installing the enclosure 9, the water body 8 within the enclosure 9 is dredged, removing larger stones and debris to facilitate subsequent maintenance work.

[0034] Since this application uses open water bodies 8 to culture filter-feeding fish and filter-feeding benthic organisms, when the culture period is reached, it is necessary to harvest the adult filter-feeding fish and filter-feeding benthic organisms within the enclosure area. Harvesting methods usually include manual seine netting and fishing boat purse seine netting. The former is time-consuming and labor-intensive, while the latter is only suitable for partial and multiple harvests in open waters, making it difficult to enclose all adult fish within the area at once.

[0035] In this embodiment, the front end is the end closer to the upstream, and the back end is the end closer to the downstream.

[0036] like Figure 1 As shown, there are two tracks 11, which are erected parallel to each other along the length of the water body 8 on the left and right banks of the water body 8 and located between two fences 9. The traveling device is mounted across the water body 8 on the two tracks 11 and can move along the tracks 11. Figure 3 and Figure 4 As shown, exemplarily, the traveling device includes a car body 2 and a power mechanism 3. There are two car bodies 2, each mounted on one of two tracks 11. Two rollers 23 are rotatably mounted on the lower end of each car body 2. The rollers 23 on the downstream side of the two car bodies 2 are connected by a rotating shaft 24. Specifically, bearing seats 26 are provided on both sides of the car body 2, with bearings installed inside the bearing seats 26. A shaft 25 passes through the rollers 23, with bearings passing through both ends of the shaft 25. The shaft 25 and the rotating shaft 24 are connected by a coupling 27 to ensure that the two car bodies 2 can move synchronously. A first I-beam 21 is provided between the upper ends of the two car bodies 2. The power mechanism 3 is located on the upper end of the first I-beam 21 and is configured to drive the rotating shaft 24 to rotate. Specifically, a first sprocket 311 is fixedly mounted in the middle of the shaft 24, and the power mechanism 3 includes a motor 31, which is fixed on the first I-beam 21. A second sprocket 241 is provided at the output end of the motor 31, and a chain 32 is mounted on the first sprocket 311 and the second sprocket 241.

[0037] Preferably, the deep-well pressurized coupled open-type enclosure ecological algae control system includes a gantry frame 1, which is spanned across the left and right banks of the water body 8 and located between two enclosures 9. Tracks 11 are installed on the upper left and right sides of the gantry frame 1. By placing the tracks 11 on the gantry frame 1, ensuring that the tracks 11 are in a straight line, the stable operation of the traveling device is guaranteed. Limiting rods 12 are also installed on the gantry frame 1 at the front and rear ends of the tracks 11 to limit the movement range of the vehicle body 2.

[0038] The first winch 4 and the second winch 5 are mounted on the traveling device. There are two first winches 4, with the first winch 4 located at the front end of the second winch 5. A first pull rope 65 is wound on the first winch 4, and a second pull rope 66 is wound on the second winch 5. For example, a second I-beam 22 is provided between the upper ends of the two car bodies 2. The second I-beam 22 is located at the front end of the first I-beam 21. The first I-beam 21 and the second I-beam 22 are perpendicular to the rail 11. The first winch 4 is mounted on the car body 2, and the second winch 5 is mounted on the second I-beam 22.

[0039] The shape of the driving net 6 matches the cross section of the water body 8. The upper end of the driving net 6 floats on the water surface, and the lower end of the driving net 6 sinks into the water and is close to the riverbed. The first pull rope 65 connects the upper and lower ends of both sides of the driving net 6. The driving net 6 is a bag-shaped structure that bulges towards the rear end and is pulled by the first pull rope 65. The second pull rope 66 passes through the driving net 6 in an alternating manner and is connected to the lower end of the driving net 6.

[0040] like Figures 3-5 As shown, exemplarily, the cross-section of the water body 8 is an inverted isosceles trapezoid. The fish-driving net 6 is sheet-like, including a first upper line 61, a first lower line 62, and two first side lines 63. The two first side lines 63 are respectively connected to the two ends between the first upper line 61 and the first lower line 62. The first upper line 61 and the first lower line 62 are respectively set at the upper and lower ends of the first net body 64, and the two first side lines 63 are respectively set at the left and right ends of the first net body 64. A first float 611 is set on the first upper line 61, so that the upper end of the fish-driving net 6 can float on the water surface. A first sinker 621 is set on the first lower line 62, so that the lower end of the fish-driving net 6 sinks in the water. Since the main function of the fish-driving net 6 is to drive fish schools, the fish will swim upstream on their own due to their upstream swimming habits. Therefore, it is only necessary to approach the riverbed, and it is not necessary to completely close the cross-section of the water body 8. The first net body 64 is shaped to fit the bottom of the water body 8. The aperture of the first net body 64 is large enough for juvenile fish to pass through but not for adult fish. The first pull rope 65 is connected to the end of the first upper line 61 and the upper end of the first side line 63. The second pull rope 66 passes through the figure-eight loop of the first upper line 61, crosses through the first net body 64, and connects to the figure-eight loop of the first lower line 62.

[0041] Preferably, there are three second winches 5, spaced apart along the length of the second I-beam 22 at the upper end of the second I-beam 22. The middle second winch 5 has its rope positioned at the rear end of the second I-beam 22, while the other two second winches 5 have their ropes positioned at the front end of the second I-beam 22, corresponding to the two ends of the first lower guide line 62. The driving net 6 is arc-shaped when viewed from above, which facilitates its shape underwater. The first winch 4 is positioned towards both ends of the driving net 6, which facilitates its rope pulling in accordance with the shape of the driving net 6. It can also guide the first rope 65 through pulleys, facilitating the winding and unwinding of the first rope 65. In this embodiment, the first winch 4 mainly provides traction force for the driving net 6, and also works with the second winch 5 to pull the driving net 6 upward. The second winch 5 mainly provides upward folding and retraction force for the driving net 6.

[0042] like Figure 5 As shown, preferably, the ends of the first pull rope 65 and the second pull rope 66 are provided with first end rings 651, and steel cables are wound on the first winch 4 and the second winch 5. The ends of the steel cables are provided with self-locking hooks 652, which hook the first end rings 651 to facilitate the installation, disassembly and replacement of the driving net 6 with the first winch 4 and the second winch 5.

[0043] like Figure 4 and Figure 6As shown, the air-floating gabion 7 is located upstream of the water body 8 between two enclosures 9. The air-floating gabion 7 includes a box-shaped second net body 74 and a ring of airbags 711 located at the upper end of the second net body 74. For example, the air-floating gabion 7 includes a second upper guideline 71, a second lower guideline 72, and a second side guideline 73. The second upper guideline 71 is located at the upper end of the second net body 74, the second lower guideline 72 is located at the lower end of the second net body 74, and the second side guideline 73 is located on the side of the second net body 74. The upper and lower ends are respectively connected to the second upper guideline 71 and the second lower guideline 72. Airbags 711 are installed on the second upper guideline 71, and an air compressor 76 is installed on the bank. The air compressor 76 is connected to the airbags 711 via air pipes. A second sinker 721 is installed on the second lower guideline 72. The shape of the second net body 74 matches the cross-sectional shape of the water body 8, and its front end is close to the enclosure 9. The second top line 71 is also connected to top rings 712 at intervals. A third pull rope 75 passes through the top rings 712. Second end rings 751 are set at both ends of the third pull rope 75. The second end rings 751 are located between two adjacent top rings 712 on the side closer to the shore, so as to facilitate the pulling of the air-floating net cage 7 ashore by a winch to harvest the fish.

[0044] In this scenario, the airbag 711 is in an uninflated state, the air-floating net cage 7 is submerged at the bottom of the riverbed, the traveling device moves from the downstream side of the track 11 to the upstream side, the driving net 6 moves above the air-floating net cage 7, the airbag 711 inflates and causes the second net body 74 to float up, enclosing the driving net 6 and the fish in the second net body 74, the second winch 5 is configured to wind up the second pull rope 66, fold and gather the driving net 6 until the driving net 6 rises above the water surface.

[0045] like Figure 6 As shown, preferably, guide rings 732 are spaced apart along the length of the second side line 73, and fixing pins 731 are provided on the bank, with the positions of the fixing pins 731 corresponding to the guide rings 732. A guide rope 7333 passes through the guide rings 732, with one end connected to the fixing pin 731 and the other end connected to the second lower line 72. The portion of the guide rope 7333 in the water body 8 is close to the waist of the riverbed. When the air-floating net cage 7 sinks, the length of the guide rope 733 is just enough for the side of the second net body 74 to sink to the bottom of the riverbed along the guide rope 733. When the air-floating net cage 7 rises, its side can rise along the guide rope 7333, reducing the possibility of fish escaping through the gap between the second net body 74 and the riverbed, thus improving capture efficiency.

[0046] like Figure 7As shown, the deep well pressurized coupled open enclosure ecological algae control system also includes an algae control well 13. The algae control well 13 is located at the front end of the upstream enclosure 9. The algae control well 13 includes an outer cylinder 131 and an inner cylinder 132. The lower end of the outer cylinder 131 is buried at the bottom of the riverbed. The inner cylinder 132 is nested inside the outer cylinder 131 and the upper end of the inner cylinder 132 passes through the upper end of the outer cylinder 131. A return channel is formed between the outer cylinder 131 and the inner cylinder 132. The upper end of the inner cylinder 132 has a water inlet 133, which is submerged below the water surface of the water body 8. A propulsion device 134 is installed on the side of the outer cylinder 131. One end of the propulsion device 134 is connected to the return channel, and the other end passes through the enclosure 9 and connects to the water body 8 between the two enclosures 9. The propulsion device 134 pumps the algae water that falls into the algae control well 13 out to the water body 8 between the two enclosures 9 through the return channel. Specifically, the propulsion device 134 includes a pipe and a propulsion unit installed inside the pipe. A fish-proof net is installed at the end of the pipe near the enclosure 9 to prevent fish from swimming upstream into the pipe. The technical solution for the algae control well 13 originates from the Chinese utility model patent with publication number CN206927643U, entitled "A Novel Deep Well Treatment Equipment for Cyanobacteria". Cyanobacteria cells have air sac structures, which allow them to float and sink. When the cyanobacteria enter the bottom of the algae control well 13 through the inlet 133 and are subjected to a hydrostatic pressure of 0.7 MPa, the air sac structures lose their ability to inflate and deflate, causing the cyanobacteria to lose their ability to float. Then, the cyanobacteria are discharged from the return channel through the propulsion device 134 into the water body 8 between the two enclosures 9, where they disperse, improving the predation efficiency of filter-feeding fish on the cyanobacteria, while preventing excessive fish aggregation during feeding, which could lead to excessive biomass and pollution in the local water body 8.

[0047] This embodiment also discloses a maintenance method for a deep well pressurized coupled open-net ecological algae control system, including the following steps: Preparation: Connect both sides of the driving net 6 to the first winch 4 via the first pull rope 65, and connect the lower end of the driving net 6 to the second winch 5 via the second pull rope 66. At this time, the traveling device is in the first position, the upper end of the driving net 6 floats on the water surface, and the lower end of the driving net 6 sinks into the water and is close to the bottom of the riverbed. At the same time, sink the uninflated air-floating net cage 7 between the two fences 9 near the bottom of the riverbed upstream.

[0048] Driving fish: The traveling device moves the driving net 6 from the first position to the second position. The driving net 6 drives the adult fish in the water body 8 between the two fences 9 to the upstream, and at this time the driving net 6 is located above the air-floating net cage 7.

[0049] Specifically, the motor 31 is started, and its output drives the first sprocket 311 to rotate. The first sprocket 311 drives the second sprocket 241 to rotate via the chain 32. The second sprocket 241 drives the rotating shaft 24 to rotate, and the rotating shaft 24 drives the roller 23 to rotate. The roller 23 rolls on the track 11, moving the vehicle body 2. Since the driving net 6 almost covers the cross-section of the water body 8 and moves from downstream to upstream, it can drive the adult fish school upstream relatively stably, with very little impact from the reverse collision of the adult fish school. The first position is the end of the track 11 near the downstream, and the second position is the end of the track 11 near the upstream. When the vehicle moves to the second position, the driving net 6 is above the air-floating net cage 7, meaning that the entire adult fish school is above the air-floating net cage 7. When the air-floating net cage 7 rises, there will be no gap between it and the driving net 6, preventing the adult fish school from escaping. There is also no need to set up a docking structure between the driving net 6 and the net cage, saving costs while ensuring capture efficiency.

[0050] Air-floating fish enclosure: The air bladder 711 is inflated, which causes the second net body 74 to float up, encircling the driving net 6 and the adult fish school into the second net body 74.

[0051] Specifically, the air compressor 76 on the shore inflates the airbag 711 through the air pipe. The airbag 711 drives the second upper line 71 and the second net 74 to float up along the guide rope 7333 until the airbag 711 floats on the water surface with the second upper line 71. At this time, the second net 74 is fully deployed.

[0052] Net repositioning: The second winch 5 winds up the second rope 66, folding and gathering the driving net 6, and continues to pull the driving net 6 upwards until it is above the water surface. The traveling mechanism then moves the driving net 6 from the second position to the first position. Next, the air-floating net cage 7 is pulled ashore.

[0053] Specifically, when the driving net 6 is folded and retracted, it is flush with the water surface. The second winch 5 continues to wind up the second pull rope 66, while the first winch 4 can also cooperate to wind up the first pull rope 65, so that the driving net 6 rises above the water surface, avoiding mutual interference when pulling the air-floating net cage 7.

[0054] like Figure 8 As shown, further, in the net-collecting and resetting step, the driving net 6 is replaced with a rake net 10. The rake net 10 includes a net frame 101, a net bag 102 connected to the front end of the net frame 101, and a rake body 103 connected to the rear end of the net frame 101. The net frame 101 is connected to the first winch 4 and the second winch 5 via a pull rope. The traveling device drives the rake net 10 from the second position to the first position to capture filter-feeding benthic organisms.

[0055] In this embodiment, the driving net 6 is moved from the first position to the second position on the track 11 by a traveling device. The driving net 6, with its shape conforming to the cross-section of the water body 8 and utilizing the fish's upstream swimming instinct, drives the adult fish from downstream to upstream. At this point, the adult fish are located between the upstream fence 9 and the driving net 6. The driving net 6 is positioned above the air-floating net cage 7 submerged at the bottom of the riverbed. The air-floating net cage 7's air bladder 711 inflates and floats, enclosing the driving net 6 and the fish within the second net body 74. When the air-floating net cage 7 rises, there is no gap between it and the driving net 6, preventing the fish from escaping. There is also no need for a docking structure between the driving net 6 and the net cage, saving costs while ensuring capture efficiency. The second winch 5 winds up the second pull rope 66, folding and retracting the driving net 6 until it rises above the water surface, avoiding interference when pulling the air-floating net cage 7 later. The structure is ingeniously designed and highly automated.

[0056] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A deep-well pressurized coupled open-net ecological algae control system, characterized in that, The deep-well pressurized coupled open-net ecological algae control system includes: The enclosure (9) has two sections, set in the upstream and downstream of a nearly straight body of water (8), where filter-feeding fish and filter-feeding benthic organisms are placed in the body of water (8) between the two enclosures (9); The track (11) has two rails, which are erected on the left and right banks of the water body (8) and located between two fences (9). The traveling device is set across the water body (8) on the two rails (11) and can move along the rails (11). The first winch (4) and the second winch (5) are mounted on the traveling device. There are two first winches (4). The first winch (4) is located at the front end of the second winch (5). The first winch (4) is wound with a first pull rope (65), and the second winch (5) is wound with a second pull rope (66). The driving net (6) is shaped to match the cross section of the water body (8). The upper end of the driving net (6) floats on the water surface, and the lower end of the driving net (6) sinks in the water and is close to the riverbed. The first pull rope (65) connects the upper and lower ends of the two sides of the driving net (6). The driving net (6) is a pouch-shaped structure that protrudes towards the rear end and is pulled by the first pull rope (65). The second pull rope (66) passes through the driving net (6) and is connected to the lower end of the driving net (6). An air-floating cage (7) is set up upstream of the water body (8) between the two fences (9). The air-floating cage (7) includes a second net body (74) in the shape of a box and a ring of air bladders (711) set on the upper end of the second net body (74). In this process, the airbag (711) is in an uninflated state, the air-floating net cage (7) is submerged at the bottom of the riverbed, the traveling device moves from the downstream side of the track (11) to the upstream side, the driving net (6) moves to the top of the air-floating net cage (7), the airbag (711) inflates and drives the second net body (74) to float up, encircling the driving net (6) and the fish in the second net body (74), the second winch (5) is configured to wind up the second pull rope (66), fold and gather the driving net (6) until the driving net (6) rises above the water surface.

2. The deep well pressurized coupled open-net ecological algae control system according to claim 1, characterized in that: The deep well pressurized coupled open-net ecological algae control system includes a gantry (1), which is spanned across the left and right banks of the water body (8) and located between two fences (9). The track (11) is located on the left and right sides of the upper end of the gantry (1). The traveling device includes: The car body (2) has two parts, which are respectively set on the two tracks (11). Two rollers (23) are rotatably set at the lower end of the car body (2). The rollers (23) on the downstream side of the two car bodies (2) are connected by a pivot (24). A first I-beam (21) and a second I-beam (22) are set between the upper ends of the two car bodies (2). The second I-beam (22) is located at the front end of the first I-beam (21). The first winch (4) is set on the car body (2), and the second winch (5) is set on the second I-beam (22). The power mechanism (3) is located on the upper end of the first I-beam (21) and is configured to drive the rotating shaft (24) to rotate.

3. The deep well pressurized coupled open-net ecological algae control system according to claim 2, characterized in that: The first sprocket (311) is fixedly sleeved in the middle of the shaft (24). The power mechanism (3) includes a motor (31), which is fixed on the first I-beam (21). The output end of the motor (31) is provided with a second sprocket (241), and the chain (32) is sleeved on the first sprocket (311) and the second sprocket (241).

4. The deep well pressurized coupled open-net ecological algae control system according to claim 2, characterized in that: The cross-section of the water body (8) is an inverted isosceles trapezoid; the driving net (6) is sheet-like, including a first upper line (61), a first lower line (62) and two first side lines (63), the two first side lines (63) are respectively connected to the two ends between the first upper line (61) and the first lower line (62), the first upper line (61) and the first lower line (62) are respectively set at the upper end and the lower end of the first net body (64), and the two first side lines (63) are respectively set at the first upper line (61) and the lower line (62) of the first net body (64). At the left and right ends of a net body (64), a first float (611) is set on the first upper line (61), and a first sinker (621) is set on the first lower line (62). The shape of the first net body (64) matches the cross-sectional shape of the water body (8). The first pull rope (65) is connected to the end of the first upper line (61) and the upper end of the first side line (63). The second pull rope (66) passes through the first net body (64) and is connected to the first lower line (62).

5. The deep well pressurized coupled open-net ecological algae control system according to claim 4, characterized in that: The second winch (5) has three units, which are spaced apart at the upper end of the second I-beam (22) along the length direction of the second I-beam (22). The middle second winch (5) has its rope pulling position at the rear end of the second I-beam (22), while the other two second winches (5) have their rope pulling positions at the front end of the second I-beam (22).

6. The deep well pressurized coupled open-net ecological algae control system according to claim 4, characterized in that: The air-floating net cage (7) includes a second upper line (71), a second lower line (72), and a second side line (73). The second upper line (71) is located at the upper end of the second net body (74), the second lower line (72) is located at the lower end of the second net body (74), and the second side line (73) is located on the side of the second net body (74), with its upper and lower ends connected to the second upper line (71) and the second lower line (72), respectively. An airbag (711) is installed on the second upper line (71), and an air compressor (76) is installed on the shore. An air compressor (76) is connected to the air bag (711) via an air pipe. A second sinker (721) is set on the second lower line (72). The shape of the second net body (74) matches the cross-sectional shape of the water body (8), and the front end is close to the fence (9). Top rings (712) are also connected at intervals on the second upper line (71). A third pull rope (75) passes through the top ring (712). Second end rings (751) are set at both ends of the third pull rope (75). The second end rings (751) are located between two adjacent top rings (712) on the side closer to the shore.

7. The deep well pressurized coupled open-net ecological algae control system according to claim 6, characterized in that: The second side guide line (73) is provided with guide rings (732) spaced apart along its length direction, and a fixing pin (731) is provided on the bank. The position of the fixing pin (731) corresponds to the guide ring (732). The guide rope (733) passes through the guide ring (732), with one end connected to the fixing pin (731) and the other end connected to the second lower guide line (72). The part of the guide rope (733) in the water body (8) is close to the waist of the riverbed.

8. The deep well pressurized coupled open-net ecological algae control system according to claim 1, characterized in that: The deep well pressurized coupled open enclosure ecological algae control system also includes an algae control well (13), the location of which corresponds to the front end of the upstream enclosure (9). The algae control well (13) includes an outer cylinder (131) and an inner cylinder (132). The lower end of the outer cylinder (131) is buried at the bottom of the riverbed. The inner cylinder (132) is nested inside the outer cylinder (131), and the upper end of the inner cylinder (132) passes through the upper end of the outer cylinder (131). A reflux is formed between the outer cylinder (131) and the inner cylinder (132). The inner cylinder (132) has an inlet (133) at its upper end, which is submerged below the water surface of the water body (8). The outer cylinder (131) is provided with a flow-pushing device (134) on its side. One end of the flow-pushing device (134) is connected to the return channel, and the other end passes through the fence (9) and connects to the water body (8) between the two fences (9). The flow-pushing device (134) pumps the algae water that falls into the algae control well (13) out to the water body (8) between the two fences (9) through the return channel.

9. The deep well pressurized coupled open-net ecological algae control system according to claim 1, characterized in that: The fence (9) includes: Pipe piles (91) are inserted into the riverbed; A frame (92) is set between adjacent pipe piles (91), with the lowermost part of the frame (92) buried in the riverbed, and the upper part of the frame (92) being higher than the surface of the water body (8). A barrier net (93) is laid on both sides of the frame (92); The filter-feeding fish include silver carp, bighead carp, and gudgeon; the filter-feeding benthic organisms include freshwater mussels and snails; the stocking ratio of silver carp to bighead carp is 2:1, and the stocking quantity of silver carp and bighead carp is 130g / m³. 2 The amount of gudgeon released was 30g / m³. 2 The amount of freshwater mussels released was 35g / m³. 2 The amount of snails added was 50g / m³. 2 .

10. The maintenance method of the deep well pressurized coupled open-net ecological algae control system as described in any one of claims 1 to 9, characterized in that, Includes the following steps: Preparation: Connect the two sides of the driving net (6) to the first winch (4) through the first pull rope (65), and connect the lower end of the driving net (6) to the second winch (5) through the second pull rope (66). At this time, the traveling device is in the first position, the upper end of the driving net (6) floats on the water surface, and the lower end of the driving net (6) sinks into the water and is close to the bottom of the riverbed. At the same time, sink the uninflated air-floating net cage (7) between the two fences (9) and close to the bottom of the riverbed upstream. Driving fish: The driving device moves the driving net (6) from the first position to the second position. The driving net (6) drives the adult fish in the water (8) between the two fences (9) to the upstream position. At this time, the driving net (6) is located above the air-floating net cage (7). Air-floating fish enclosure: The air bladder (711) is inflated, which causes the second net body (74) to float up, encircling the driving net (6) and the adult fish school into the second net body (74); Net repositioning: The second winch (5) winds up the second rope (66) to fold and gather the driving net (6). After the driving net (6) is folded and gathered, it is located above the water surface. The traveling device drives the driving net (6) from the second position to the first position, and then pulls the air-floating net box (7) ashore.

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