Lake ecological restoration dredging device and method

Abstract

The application discloses a kind of lake ecological restoration dredging device and method, belong to ecological restoration field.A kind of lake ecological restoration dredging device, including buoyancy seat, the top of the buoyancy seat is fixedly connected with drain cylinder, the bottom of the buoyancy seat is fixedly connected with sludge pump, further include: separation cylinder, the separation cylinder is rotatably connected in drain cylinder, the output end of sludge pump is through the bottom of separation cylinder pivot center and is communicated with its inner cavity, a plurality of groups of water filter holes are opened on the lateral wall of the separation cylinder at equal intervals;The application is separated by the rotation of separation cylinder, realizes solid-liquid separation to sludge, significantly reduces the volume of solid waste, is more easily subsequent transportation and processing, reduces dredging cost;And the meshing transmission of cooperation drive gear disc, steering gear and reverse gear makes that rotating sleeve is along with with wall scraping plate opposite direction rotation of separation cylinder rotation, to filter surface of silt filter screen is cleaned in this way, improves filtering efficiency.

Description

Technical Field

[0001] This invention relates to the field of ecological restoration technology, and in particular to a dredging device and method for lake ecological restoration. Background Technology

[0002] Lakes, as important freshwater resources and components of ecosystems, play an irreplaceable role in maintaining regional ecological balance, providing habitats for organisms, and regulating climate. However, with the acceleration of urbanization, lakes face a series of problems such as water pollution, sediment accumulation, and ecosystem imbalance. These problems seriously affect the water quality and ecological functions of lakes, thus necessitating ecological restoration.

[0003] Lake ecological restoration can be achieved through physical, chemical, and biological methods. Among physical restoration methods, the removal of silt from the lake bottom is a common approach. The purpose of dredging is to remove sediment from the bottom of the lake, improve the physical, chemical, and biological properties of the water, and thus restore the lake's ecological functions.

[0004] Currently, when dredging, the solid and liquid parts of the silt are usually extracted together. The liquid part of the silt occupies a large transportation space, which increases the burden of subsequent transportation and treatment of the silt and raises the cost of dredging. Moreover, relying solely on dredging operations cannot quickly and effectively restore the ecological environment of lakes. Therefore, a dredging device and method for lake ecological restoration is proposed. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the prior art where the liquid part of silt occupies a large transportation space, increases the burden of transportation and treatment, and increases the cost of dredging; moreover, relying solely on dredging operations cannot quickly and effectively restore the ecological environment of lakes. Therefore, this invention proposes a dredging device and method for lake ecological restoration.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A dredging device for lake ecological restoration includes a buoyancy base with a drainage cylinder fixedly connected to its top and a sludge pump fixedly connected to its bottom. It also includes a separation cylinder rotatably connected inside the drainage cylinder, with the output end of the sludge pump passing through the center of the bottom rotating shaft of the separation cylinder and communicating with its inner cavity. The separation cylinder has multiple sets of filter holes evenly spaced on its side wall, a silt-blocking filter screen fixedly connected to its inner wall, and a drive unit for rotating the separation cylinder on the drainage cylinder. A piston box has multiple sets of piston boxes evenly spaced and fixed to the outer wall of the drainage cylinder, with a medicine storage tank fixedly connected to its top. The piston box contains an aeration unit for injecting air into the lake water.

[0008] To reduce the cost of sludge transportation, preferably, the drive unit includes a drive box, which is fixed to the outer wall of the drainage cylinder and communicates with the inner cavity of the drainage cylinder. A drive gear is rotatably connected inside the drive box, and a drive motor is fixedly connected to the top of the drive box. The output shaft of the drive motor is fixedly connected to the rotating shaft of the drive gear. A driven gear is fixedly connected to the upper part of the outer wall of the separation cylinder, and the driven gear is meshed with the drive gear. Return holes are evenly spaced at the bottom of the drainage cylinder.

[0009] To improve separation efficiency, preferably, a rotating sleeve is rotatably connected to the top of the drainage cylinder, the bottom end of the rotating sleeve penetrates into and is rotatably connected to the separation cylinder, a sludge pump is fixedly connected to the top of the drainage cylinder, the input pipe of the sludge pump passes through the inner cavity of the rotating sleeve to the bottom of the separation cylinder, a positioning ring is fixedly connected to the outer wall of the rotating sleeve located inside the separation cylinder, a scraper is fixedly connected to the outer wall of the positioning ring, the scraper is in contact with the sludge intercepting filter screen, a reverse gear is fixedly connected to the outer wall of the rotating sleeve located inside the drainage cylinder, a drive gear is fixedly connected to the top of the separation cylinder, and a steering gear is rotatably connected to the inner top of the drainage cylinder, the drive gear, the steering gear, and the reverse gear are meshed together.

[0010] To improve the ecological restoration effect of water bodies, preferably, the aeration section includes a piston plate, which is slidably connected in a piston box. A return spring is fixedly connected between the side wall of the piston plate and the inner wall of the piston box. A magnetic plate is fixedly connected to the upper part of the outer wall of the separation cylinder. The magnetic plate and the piston plate are magnetically repelled. An aeration pipe is fixed and connected to the bottom of the piston box. The aeration pipe extends through to below the buoyancy seat, and a one-way valve is provided inside the aeration pipe.

[0011] To improve the separation efficiency of the silt-trapping filter, preferably, a negative pressure box is fixedly connected to the top of the drainage cylinder, the top end of the rotating sleeve penetrates into the negative pressure box and is rotatably connected to it, a negative pressure guide groove is opened inside the rotating sleeve, and the two ends of the negative pressure guide groove are respectively connected to the negative pressure box and the inner cavity of the positioning ring, the side of the scraper plate that is in contact with the silt-trapping filter is provided with a back suction groove, the back suction groove is connected to the inner cavity of the positioning ring, a negative pressure pipe is fixed and connected to the outer wall of the piston box, the other end of the negative pressure pipe is connected to the inner cavity of the negative pressure box, and a one-way valve is provided inside the negative pressure pipe.

[0012] In order to treat the separated water and improve its quality, preferably, the bottom of the piston box is fixed and connected to a drug injection pipe, the other end of the drug injection pipe passes through the cavity formed by the drain cylinder and the separation cylinder, the top and bottom side walls of the piston plate are fixedly connected to a sealing plate, a drug guide groove is opened in the piston plate, and a drug injection groove is opened between the drug storage tank and the piston box.

[0013] Furthermore, a limiting plate is fixedly connected inside the piston box. When the sealing plate abuts against the limiting plate, the injection groove, the guide groove, and the injection tube are connected.

[0014] To facilitate the mixing of the medicine and water, preferably, a liquid-dispersing groove is provided on the outer wall of the separation cylinder, and a liquid-dispersing paddle is rotatably connected in the liquid-dispersing groove. An outer magnetic plate is fixedly connected to the end of the liquid-dispersing paddle located in the liquid-dispersing groove, and the outer magnetic plate and the wall scraper are magnetically attracted to each other.

[0015] To facilitate cleaning of the injection tank, the guide tank, and the injection pipe, preferably, the top of the scraper is fixed and connected to a cleaning pipe, and a one-way valve is installed inside the cleaning pipe. A water injection pipe is fixed and connected to one of the negative pressure pipes, and a solenoid valve is installed inside both the water injection pipe and the negative pressure pipe. Air replenishment holes are opened at equal intervals on the top of the drain cylinder.

[0016] A dredging method for lake ecological restoration, the steps of which are as follows:

[0017] Step 1: Place the entire buoyancy base into the water area to be dredged, and insert the input end of the sludge pump into the sludge in the water.

[0018] Step 2: Pump the sludge into the separation cylinder for solid-liquid separation;

[0019] Step 3: Add water purification agent to the separated water stream, mix the two together, and then discharge them back into the water body;

[0020] Step 4: Aerate the water and continuously clean the silt-trapping filter screen;

[0021] Step 5: Periodically turn on the sludge pump to discharge the sludge trapped in the separator.

[0022] Compared with the prior art, the present invention provides a dredging device and method for lake ecological restoration, which has the following beneficial effects:

[0023] 1. The dredging device for lake ecological restoration achieves solid-liquid separation of silt through the rotation of the separation cylinder, significantly reducing the volume of solid waste, making it easier for subsequent transportation and treatment, and reducing dredging costs; and with the meshing transmission of the drive gear, steering gear and reverse gear, the rotating sleeve carries the scraper plate to rotate in the opposite direction to the rotation of the separation cylinder, thereby cleaning the filter surface of the silt intercepting filter screen and improving filtration efficiency.

[0024] 2. The dredging device for lake ecological restoration utilizes the repulsive action between the magnetic plate and the piston plate, along with a reset spring, to first aerate the water body, increasing the oxygen content and effectively improving water quality. Secondly, it performs back-suction cleaning of the silt intercepting filter screen located at the filter holes, further ensuring the filtration and separation effect of the silt intercepting filter screen and effectively improving the filtration and separation efficiency of the solid and liquid components of the silt.

[0025] 3. The dredging device for lake ecological restoration, through the setting of the sealing plate and the limiting plate, keeps the injection tank, the guide tank and the injection pipe in a connected state during the sliding of the piston plate, so that the water purification agent in the storage tank drips into the drainage cylinder. With the rotation of the liquid-dispensing paddle, the water is treated at a deeper level, which further improves the water quality. In addition, the attraction between the outer magnetic plate and the scraper plate can continuously change the angle of the liquid-dispensing paddle, thereby improving the mixing effect. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a dredging device for lake ecological restoration proposed in this invention. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the overall structure of a dredging device for lake ecological restoration proposed in this invention. Figure 2 ;

[0028] Figure 3 This is a side view semi-sectional diagram of a dredging device for lake ecological restoration proposed in this invention. Figure 1 ;

[0029] Figure 4 This invention proposes a dredging device for lake ecological restoration. Figure 3 Enlarged structural diagram of region A in the middle;

[0030] Figure 5 This invention proposes a dredging device for lake ecological restoration. Figure 3 Enlarged structural diagram of region B in the middle;

[0031] Figure 6 This is a side view semi-sectional diagram of a dredging device for lake ecological restoration proposed in this invention. Figure 2 ;

[0032] Figure 7 This invention proposes a dredging device for lake ecological restoration. Figure 6 Enlarged structural diagram of region C in the middle;

[0033] Figure 8 This is a partial cross-sectional structural diagram of a dredging device for lake ecological restoration proposed in this invention;

[0034] Figure 9 This invention proposes a dredging device for lake ecological restoration. Figure 8 A magnified schematic diagram of the D region.

[0035] In the diagram: 1. Buoyancy seat; 2. Drainage cylinder; 21. Sludge pump; 22. Sludge discharge pump; 23. Positioning ring; 24. Scraper; 25. Reverse gear; 26. Return hole; 27. Rotating sleeve; 3. Separation cylinder; 31. Filter hole; 32. Sludge interception filter screen; 33. Steering gear; 34. Liquid-dispensing groove; 341. Liquid-dispensing paddle; 342. Outer magnetic plate; 35. Drive gear plate; 4. Piston box; 41. Piston plate; 4 2. Reset spring; 43. Magnetic plate; 44. Aeration pipe; 5. Medicine storage tank; 6. Drive box; 61. Drive gear; 62. Drive motor; 63. Driven gear plate; 7. Negative pressure box; 71. Negative pressure guide groove; 72. Back suction groove; 73. Negative pressure pipe; 731. Water injection pipe; 74. Cleaning pipe; 75. Air inlet; 8. Medicine injection pipe; 81. Sealing plate; 82. Medicine guide groove; 83. Medicine injection groove; 84. Limiting plate. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] Example 1:

[0039] Reference Figures 1-9A dredging device for lake ecological restoration includes a buoyancy base 1, a drainage cylinder 2 fixedly connected to the top of the buoyancy base 1, and counterweight balls evenly distributed at the bottom of the buoyancy base 1 to improve the stability of the buoyancy base 1 when floating on the water surface. A sludge pump 21 is fixedly connected to the bottom of the buoyancy base 1. The device also includes a separation cylinder 3, which is rotatably connected inside the drainage cylinder 2. The output end of the sludge pump 21 passes through the center of the bottom rotating shaft of the separation cylinder 3 and communicates with the inner cavity of the separation cylinder 3. Multiple sets of filter holes 31 are evenly spaced on the side wall of the separation cylinder 3. A silt intercepting filter screen 32 is fixedly connected to the inner wall of the separation cylinder 3, and a drive unit for driving the separation cylinder 3 to rotate is provided on the drainage cylinder 2. A piston box 4 is provided with multiple sets of piston boxes evenly spaced and fixed to the outer wall of the drainage cylinder 2. A medicine storage tank 5 is fixedly connected to the top of the piston box 4. An aeration unit for filling the lake water body with air is provided inside the piston box 4.

[0040] Reference Figures 1-4 The drive unit includes a drive box 6, which is fixed to the outer wall of the drain cylinder 2 and communicates with the inner cavity of the drain cylinder 2. A drive gear 61 is rotatably connected inside the drive box 6. A drive motor 62 is fixedly connected to the top of the drive box 6, and the output shaft of the drive motor 62 is fixedly connected to the rotating shaft of the drive gear 61. A driven gear 63 is fixedly connected to the upper part of the outer wall of the separation cylinder 3, and the driven gear 63 is meshed with the drive gear 61. Return holes 26 are evenly spaced at the bottom of the drain cylinder 2. A rotating sleeve 27 is rotatably connected to the top of the drain cylinder 2, and the bottom end of the rotating sleeve 27 penetrates into the separation cylinder 3 and is rotatably connected to it. A sludge pump 22 is fixedly connected to the top of the drainage cylinder 2. The input pipe of the sludge pump 22 passes through the inner cavity of the rotating sleeve 27 to the bottom of the separation cylinder 3. A positioning ring 23 is fixedly connected to the outer wall of the rotating sleeve 27 inside the separation cylinder 3. A scraper 24 is fixedly connected to the outer wall of the positioning ring 23. The scraper 24 is in contact with the sludge intercepting filter screen 32. A reverse gear 25 is fixedly connected to the outer wall of the rotating sleeve 27 inside the drainage cylinder 2. A drive gear 35 is fixedly connected to the top of the separation cylinder 3. A steering gear 33 is rotatably connected to the inner top of the drainage cylinder 2. The drive gear 35, the steering gear 33 and the reverse gear 25 are meshed together.

[0041] With the above-described structure, as the drive motor 62 operates, the driven gear 63 meshes with the drive gear 61, causing the separation cylinder 3 to rotate synchronously. This utilizes centrifugal force to allow the liquid portion of the sludge to pass through the intercepting filter screen 32 and the filter holes 31 into the drainage cylinder 2, and then be discharged back into the water body through the return hole 26. This reduces the need for external water replenishment, saves water resources, and lowers operating costs. The solid portion of the sludge is retained within the separation cylinder 3, thus achieving solid-liquid separation of the sludge, which can then be... The sludge pump 22 is turned on periodically to discharge the solid portion of the intercepted sludge, thereby significantly reducing the volume of solid waste and making it easier to transport and process, thus reducing sludge removal costs. In addition, during the rotation of the separation cylinder 3, the meshing transmission between the drive gear 35, the steering gear 33 and the reverse gear 25 will cause the rotating sleeve 27 to rotate with the scraper 24 in the opposite direction to the rotation of the separation cylinder 3, thereby effectively cleaning the filter surface of the intercepting filter screen 32, avoiding excessive clogging of the intercepting filter screen 32 and improving filtration efficiency.

[0042] Reference Figures 1-7 The aeration section includes a piston plate 41, which is slidably connected inside a piston box 4. A return spring 42 is fixedly connected between the side wall of the piston plate 41 and the inner wall of the piston box 4. A magnetic plate 43 is fixedly connected to the upper part of the outer wall of the separation cylinder 3. The magnetic plate 43 and the piston plate 41 are magnetically repelled. An aeration pipe 44 is fixedly connected to the bottom of the piston box 4 and extends through to the bottom of the buoyancy seat 1. A one-way valve is installed inside the aeration pipe 44. A negative pressure box 7 is fixedly connected to the top of the drain cylinder 2, and the top end of the rotating sleeve 27 passes through it. The negative pressure box 7 is rotatably connected to the negative pressure box 7. The rotating sleeve 27 has a negative pressure guide groove 71. The two ends of the negative pressure guide groove 71 are connected to the negative pressure box 7 and the inner cavity of the positioning ring 23, respectively. The scraper plate 24 has a reverse suction groove 72 on one side that is attached to the silt intercepting filter screen 32. The reverse suction groove 72 is connected to the inner cavity of the positioning ring 23. The piston box 4 has a negative pressure pipe 73 fixed and connected to the outer wall. The other end of the negative pressure pipe 73 is connected to the inner cavity of the negative pressure box 7. A one-way valve is installed in the negative pressure pipe 73. The top of the drain cylinder 2 has air replenishment holes 75 at equal intervals.

[0043] It should be noted that the one-way valve in the aeration pipe 44 can only allow the gas in the piston box 4 to be discharged into the water body through the aeration pipe 44; the one-way valve in the negative pressure pipe 73 can only allow the gas in the negative pressure box 7 to enter the piston box 4.

[0044] With the above-described structure, during the rotation of the separator 3, the solenoid valve in the negative pressure pipe 73 is opened. In conjunction with the magnetic repulsion between the magnetic plate 43 and the piston plate 41, when the two are in the repulsive region, the piston plate 41 will be pushed to slide towards the side of the compression return spring 42, thereby compressing the gas in the piston box 4 and opening the one-way valve in the aeration pipe 44. This allows the gas in the piston box 4 to flow into the water body through the aeration pipe 44, achieving aeration of the water body, increasing the oxygen content inside the water body, promoting the growth and metabolism of aerobic microorganisms, effectively degrading organic pollutants in the water body, completing the ecological restoration of the water body, and thus effectively improving the water quality. When the magnetic plate 43 and the piston plate 41 are separated from the repulsive area, the return spring 42 will generate a negative pressure suction force in the piston box 4 and open the one-way valve in the negative pressure pipe 73. This allows the negative pressure suction force to be transmitted along the negative pressure pipe 73, the negative pressure box 7, and the negative pressure guide groove 71 to the back suction groove 72, thereby back suction cleaning the silt intercepting filter screen 32 located at the water filter hole 31. Combined with the cleaning action of the scraper plate 24, the filtration and separation effect of the silt intercepting filter screen 32 is further ensured, thereby effectively improving the filtration and separation efficiency of the solid and liquid components of the silt.

[0045] In addition, when suction is generated in the negative pressure pipe 73 for back suction cleaning, the external airflow will pass through the air replenishment hole 75 into the drain cylinder 2, and then enter the back suction tank 72 through the water filter hole 31 located at the top. When the back suction tank 72 passes the position of the water filter hole 31, the back suction tank 72 will be sealed with the intercepting filter screen 32 without the water filter hole 31. At this time, the gas-liquid mixture remaining in the back suction tank 72 will move upward (due to density difference) under the action of gravity and centrifugal force and overflow the liquid surface, entering the side close to the negative pressure guide channel 71. In this way, the gas consumed by aeration in the piston box 4 can be partially cleaned, realizing the continuous operation of aeration and back suction cleaning of the device.

[0046] Reference Figures 6-9 The piston box 4 is fixed at the bottom and connected to a drug injection tube 8. The other end of the drug injection tube 8 passes through the cavity formed by the drain cylinder 2 and the separation cylinder 3. The top and bottom side walls of the piston plate 41 are fixedly connected to a sealing plate 81. A drug guide groove 82 is opened in the piston plate 41. A drug injection groove 83 is opened between the drug storage tank 5 and the piston box 4. A limit plate 84 is fixedly connected in the piston box 4. When the sealing plate 81 touches the limit plate 84, the drug injection groove 83, the drug guide groove 82 and the drug injection tube 8 are connected. A liquid dispersing groove 34 is opened on the outer wall of the separation cylinder 3. A liquid dispersing paddle 341 is rotatably connected in the liquid dispersing groove 34. An outer magnetic plate 342 is fixedly connected to the end of the liquid dispersing paddle 341 located in the liquid dispersing groove 34. The outer magnetic plate 342 and the scraper plate 24 are magnetically attracted to each other.

[0047] With the above structure, when the magnetic plate 43 and the piston plate 41 repel each other, the sealing plate 81 will contact the limiting plate 84 in conjunction with the setting of the limiting plate 84. At this time, the injection tank 83, the guide tank 82 and the injection pipe 8 will be in a connected state, and the water purification agent in the storage tank 5 will enter the drain cylinder 2 through the above-mentioned connecting pipe. With the rotation of the separation cylinder 3, the liquid-dispensing paddle 341 will mix the filtered water with the water purification agent and discharge it back into the water body through the return hole 26, thereby performing a deeper treatment of the water body and further improving the water quality. When the scraper plate 24 rotates past the liquid-dispensing paddles 341, the attraction between the outer magnetic plate 342 and the scraper plate 24 will instantly drive the liquid-dispensing paddle 341 to rotate, thereby changing the angle of the liquid-dispensing paddle 341 and improving the mixing effect, so that the water purification agent and the water flow can be mixed better, thus improving the water purification treatment effect.

[0048] Reference Figure 3 The top of the scraper 24 is fixed and connected to a cleaning pipe 74, and a one-way valve is installed inside the cleaning pipe 74. A water injection pipe 731 is fixed and connected to a set of negative pressure pipes 73, and a solenoid valve is installed inside both the water injection pipe 731 and the negative pressure pipe 73.

[0049] It should be noted that the one-way valve in the cleaning pipe 74 can only allow the water in the back suction tank 72 to enter the separation cylinder 3.

[0050] With the above structure, the solenoid valve in the negative pressure pipe 73 is closed periodically, and the back suction tank 72 is rotated to a region that is not connected to the filter hole 31. Then, the solenoid valve in the water injection pipe 731 is opened, and the external high-pressure water source is connected to the water injection pipe 731 to inject high-pressure water into the back suction tank 72, thereby backwashing the back suction tank 72. Under the action of the high-pressure water flow, the one-way valve in the cleaning pipe 74 will be opened. At this time, the dirt washed out will enter the separation cylinder 3 along the cleaning pipe 74, thereby cleaning the sludge and other substances trapped in the back suction tank 72 during back suction, ensuring the continuous realization of the back suction cleaning effect.

[0051] Example 2:

[0052] Reference Figures 1-9 Similar to Example 1, but based on Example 1, a dredging method for lake ecological restoration is proposed, with the following steps:

[0053] Step 1: Place the entire buoyancy seat 1 into the water area to be dredged, and insert the input end of the sludge pump 21 into the sludge in the water.

[0054] Step 2: Pump the sludge into separation cylinder 3 for solid-liquid separation;

[0055] Step 3: Add water purification agent to the separated water stream, mix the two together, and then discharge them back into the water body;

[0056] Step 4: Aerate the water and continuously clean the silt interception filter screen 32;

[0057] Step 5: Periodically turn on the sludge pump 22 to discharge the sludge trapped in the separator 3.

[0058] Reference Figures 1-9 In this invention, during use, the buoyancy seat 1 is placed entirely into the water area to be dredged, and the input end of the sludge pump 21 is inserted into the sludge in the water. Then, the sludge pump 21 and the drive motor 62 are simultaneously turned on. As the sludge pump 21 operates, it draws the sludge from the bottom of the water into the separation cylinder 3. Simultaneously, the drive motor 62, in conjunction with the meshing transmission of the driven gear 63 and the drive gear 61, causes the separation cylinder 3 to rotate synchronously. Using centrifugal force, the liquid portion of the sludge passes through the intercepting filter screen 32 and the filter holes 31 into the drainage cylinder 2, and is then discharged back into the water body through the return hole 26. This reduces the need for external water replenishment, saves water resources, and lowers operating costs. The solid portion of the sludge is retained in the separation cylinder 3, achieving solid-liquid separation. The sludge discharge pump 22 can then be periodically turned on to discharge the retained solid portion of the sludge, significantly reducing the volume of solid waste, making it easier for subsequent transportation and treatment, and thus reducing dredging costs. Furthermore, during the rotation of the separator cylinder 3, the meshing transmission between the drive gear 35, the steering gear 33, and the reverse gear 25 causes the rotating sleeve 27 to rotate with the scraper 24 in the opposite direction to the rotation of the separator cylinder 3. This effectively cleans the filter surface of the silt trap 32, preventing excessive clogging of the silt trap 32 and improving filtration efficiency.

[0059] Furthermore, during the rotation of the separator 3, the solenoid valve inside the negative pressure pipe 73 is opened. In conjunction with the magnetic repulsion between the magnetic plate 43 and the piston plate 41, when the two are in the repulsive region, the piston plate 41 will be pushed to slide towards the side of the compression return spring 42, thereby compressing the gas inside the piston box 4 and opening the one-way valve inside the aeration pipe 44. This allows the gas inside the piston box 4 to flow into the water body through the aeration pipe 44, thereby achieving aeration of the water body, increasing the oxygen content inside the water body, promoting the growth and metabolism of aerobic microorganisms, effectively degrading organic pollutants in the water body, completing the ecological restoration of the water body, and thus effectively improving the water quality. When the magnetic plate 43 and the piston plate 41 are separated from the repulsive area, the return spring 42 will generate a negative pressure suction force in the piston box 4 and open the one-way valve in the negative pressure pipe 73. This allows the negative pressure suction force to be transmitted along the negative pressure pipe 73, the negative pressure box 7, and the negative pressure guide groove 71 to the back suction groove 72, thereby back suction cleaning the silt intercepting filter screen 32 located at the water filter hole 31. Combined with the cleaning action of the scraper plate 24, the filtration and separation effect of the silt intercepting filter screen 32 is further ensured, thereby effectively improving the filtration and separation efficiency of the solid and liquid components of the silt.

[0060] When the magnetic plate 43 and the piston plate 41 repel each other, the sealing plate 81 will contact the limiting plate 84 due to the setting of the limiting plate 84. At this time, the injection tank 83, the guide tank 82 and the injection pipe 8 will be in a connected state. The water purification agent in the storage tank 5 will enter the drain cylinder 2 through the above-mentioned connecting pipe. With the rotation of the separation cylinder 3, the liquid-dispensing paddle 341 will mix the filtered water with the water purification agent and discharge it back into the water body through the return hole 26, thereby performing a deeper treatment of the water body and further improving the water quality. When the scraper plate 24 rotates past the liquid-dispensing paddles 341, the attraction between the outer magnetic plate 342 and the scraper plate 24 will instantly drive the liquid-dispensing paddle 341 to rotate, thereby changing the angle of the liquid-dispensing paddle 341 and improving the mixing effect so that the water purification agent and the water flow can be mixed better, thus improving the water purification treatment effect.

[0061] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A dredging device for lake ecological restoration, comprising a buoyancy base (1), characterized in that, The top of the buoyancy seat (1) is fixedly connected to a drainage cylinder (2), and the bottom of the buoyancy seat (1) is fixedly connected to a sludge pump (21). It also includes: The separation cylinder (3) is rotatably connected inside the drainage cylinder (2). The output end of the sludge pump (21) passes through the center of the bottom rotating shaft of the separation cylinder (3) and communicates with the inner cavity of the separation cylinder (3). The separation cylinder (3) has multiple sets of filter holes (31) evenly spaced on its side wall, a silt-blocking filter screen (32) is fixedly connected to the inner wall of the separation cylinder (3), and a drive unit for driving the separation cylinder (3) to rotate is provided on the drainage cylinder (2). Piston box (4), the piston box (4) is provided in multiple sets and fixed at equal intervals on the outer wall of the drain cylinder (2), and a medicine storage tank (5) is fixedly connected to the top of the piston box (4). The piston box (4) is provided with an aeration section for filling the lake water with air. A rotating sleeve (27) is rotatably connected to the top of the drainage cylinder (2). The bottom end of the rotating sleeve (27) extends through the separation cylinder (3) and is rotatably connected thereto. A sludge pump (22) is fixedly connected to the top of the drainage cylinder (2). The input pipe of the sludge pump (22) extends along the inner cavity of the rotating sleeve (27) to the bottom of the separation cylinder (3). A positioning ring (23) is fixedly connected to the outer wall of the rotating sleeve (27) located inside the separation cylinder (3). A scraper plate (24) is fixedly connected to the outer wall of the drain cylinder (2), and the scraper plate (24) is in contact with the silt intercepting filter screen (32). A reverse gear (25) is fixedly connected to the outer wall of the rotating sleeve (27) located inside the drain cylinder (2). A drive gear plate (35) is fixedly connected to the top of the separation cylinder (3). A steering gear (33) is rotatably connected to the inner top of the drain cylinder (2). The drive gear plate (35), the steering gear (33) and the reverse gear (25) are meshed together. The aeration section includes a piston plate (41), which is slidably connected in the piston box (4). A return spring (42) is fixedly connected between the side wall of the piston plate (41) and the inner wall of the piston box (4). A magnetic plate (43) is fixedly connected to the upper part of the outer wall of the separation cylinder (3). The magnetic plate (43) and the piston plate (41) are magnetically repelled. An aeration pipe (44) is fixed and connected to the bottom of the piston box (4). The aeration pipe (44) extends through to the bottom of the buoyancy seat (1). A one-way valve is provided in the aeration pipe (44). The top of the drainage cylinder (2) is fixedly connected to a negative pressure box (7). The top end of the rotating sleeve (27) passes through the negative pressure box (7) and is rotatably connected to it. A negative pressure guide groove (71) is opened inside the rotating sleeve (27). The two ends of the negative pressure guide groove (71) are respectively connected to the negative pressure box (7) and the inner cavity of the positioning ring (23). A reverse suction groove (72) is opened on the side of the scraper plate (24) that is in contact with the silt intercepting filter screen (32). The reverse suction groove (72) is connected to the inner cavity of the positioning ring (23). A negative pressure pipe (73) is fixed and connected to the outer wall of the piston box (4). The other end of the negative pressure pipe (73) is connected to the inner cavity of the negative pressure box (7). A one-way valve is provided inside the negative pressure pipe (73). The bottom of the piston box (4) is fixed and connected to the injection tube (8). The other end of the injection tube (8) passes through the cavity formed by the drain cylinder (2) and the separation cylinder (3). The top and bottom side walls of the piston plate (41) are fixedly connected to the sealing plate (81). The piston plate (41) is provided with a drug guide groove (82). The drug storage tank (5) and the piston box (4) are provided with an injection groove (83). The piston box (4) is fixedly connected to a limiting plate (84). When the sealing plate (81) touches the limiting plate (84), the injection groove (83), the guide groove (82) and the injection tube (8) are connected.

2. The dredging device for lake ecological restoration according to claim 1, characterized in that, The drive unit includes a drive box (6), which is fixed on the outer wall of the drain cylinder (2) and is connected to the inner cavity of the drain cylinder (2). A drive gear (61) is rotatably connected inside the drive box (6). A drive motor (62) is fixedly connected to the top of the drive box (6). The output shaft of the drive motor (62) is fixedly connected to the rotating shaft of the drive gear (61). A driven gear plate (63) is fixedly connected to the upper part of the outer wall of the separation cylinder (3). The driven gear plate (63) is meshed with the drive gear (61). Return holes (26) are opened at equal intervals at the bottom of the drain cylinder (2).

3. The dredging device for lake ecological restoration according to claim 1, characterized in that, The outer wall of the separation cylinder (3) is provided with a liquid-dispensing groove (34), and a liquid-dispensing paddle (341) is rotatably connected inside the liquid-dispensing groove (34). An outer magnetic plate (342) is fixedly connected to the end of the liquid-dispensing paddle (341) located inside the liquid-dispensing groove (34). The outer magnetic plate (342) and the scraping plate (24) are magnetically attracted to each other.

4. The dredging device for lake ecological restoration according to claim 1, characterized in that, The top of the scraper (24) is fixed and connected to a cleaning pipe (74), and a one-way valve is installed inside the cleaning pipe (74). A set of negative pressure pipes (73) is fixed and connected to a water injection pipe (731), and both the water injection pipe (731) and the negative pressure pipe (73) are equipped with solenoid valves. Air replenishment holes (75) are opened at equal intervals on the top of the drain cylinder (2).

5. A dredging method for lake ecological restoration, employing a dredging device for lake ecological restoration as described in any one of claims 1-4, characterized in that, The steps are as follows: Step 1: Place the buoyancy seat (1) as a whole into the water area to be dredged, and insert the input end of the sludge pump (21) into the sludge in the water. Step 2: Pump the sludge into the separation cylinder (3) for solid-liquid separation; Step 3: Add water purification agent to the separated water stream, mix the two together, and then discharge them back into the water body; Step 4: Aerate the water and continuously clean the silt-blocking filter (32); Step 5: Periodically turn on the sludge pump (22) to discharge the sludge trapped in the separator (3).

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