An intelligent on-line sediment capture and dredging device for lakes

Abstract

The present invention discloses an intelligent on-line sediment capture and dredging device for lakes, which comprises a capture ship main body, a sediment collection and crushing system, and a sediment depth detection system. The capture ship main body is a split hull. The sediment collection and crushing system is arranged inside the hull of the capture ship main body through a traction device and a lifting device. The sediment depth detection system comprises a movable telescopic support and an ultrasonic probe. The ultrasonic probe is arranged at the bottom of the capture ship main body through the movable telescopic support. A primary sieve extending to the lake bottom is installed at the front end of the capture ship main body. The sediment collection and crushing system comprises a first hollow counterweight cabin, a mixing and stirring cabin, a second hollow counterweight cabin and a sediment suction cabin which are arranged in sequence. Two-stage sediment mixing and stirring devices are horizontally arranged inside the mixing and stirring cabin, and the installation directions of the two-stage sediment mixing and stirring devices are opposite. The present invention has extremely high positioning accuracy and excavation accuracy, high fishing efficiency, stable operation, no disturbance during dredging, high safety, and can meet the requirements of environmental protection dredging.

Description

Technical Field

[0001] The present invention belongs to the technical field of river dredging and sediment treatment, and particularly relates to an intelligent on-line capturing and dredging device for lake sediment. Background Art

[0002] In the process of river and lake pollution control, sediment pollution remediation is one of the main difficulties and also a relatively common environmental problem at present. There is a dynamic balance of absorption and release between water bodies and sediment. When the water body is severely polluted, some pollutants can enter the sediment through precipitation, adsorption, etc.; when the pollution caused by external sources is controlled, various organic and inorganic pollutants accumulated in the sediment re-enter the overlying water body through physical, chemical, and biological exchange with the overlying water body, becoming a secondary pollution source affecting the water quality of the water body.

[0003] Environmental protection dredging is a dredging project aimed at improving water quality, mainly capturing and removing the upper layer of sediment rich in organic matter, nitrogen, and phosphorus at the bottom of the water. During the dredging process, the impact on the water environment should be avoided. Currently, several common dredging methods include grab dredging, pump suction dredging, hopper suction dredging, and cutter suction dredging, etc. Grab dredging has low efficiency and will strongly disturb the sediment during operation; pump suction dredging will bring out a large amount of water in the sediment, resulting in an increase in subsequent dehydration and solidification costs; hopper suction dredging and cutter suction dredging have problems such as low sediment removal rate and incomplete dredging. At the same time, the dredged sediment contains a large amount of plastic waste, stones, branches and other sundries, and garbage sorting and sand separation need to be carried out before dehydration and solidification. Therefore, there is an urgent need for an environmental protection dredging ship with high excavation accuracy, high dredging efficiency, and no water body disturbance. Summary of the Invention

[0004] The purpose of the present invention is to address the deficiencies of the above-mentioned existing technologies and provide an intelligent on-line capturing and dredging device for lake sediment, which can intelligently adjust the dredging depth, has high excavation accuracy and dredging efficiency, is not easy to cause water body disturbance, and meets the requirements of environmental protection dredging.

[0005] The technical solution adopted by the present invention is as follows:

[0006] An intelligent on-line sediment capture and dredging device for lakes, which includes a capture ship main body, a sediment collection and crushing system, and a sediment depth detection system. The capture ship main body is a split hull. The sediment collection and crushing system is arranged inside the hull of the capture ship main body through a traction device and a lifting device. The sediment depth detection system includes a movable telescopic support and an ultrasonic probe. The ultrasonic probe is arranged at the bottom of the capture ship main body through the movable telescopic support. A primary sieve extending to the lake bottom is installed at the front end of the capture ship main body. The sediment collection and crushing system includes a first hollow counterweight cabin, a mixing and stirring cabin, a second hollow counterweight cabin, and a sediment suction cabin arranged in sequence. Two-stage sediment mixing and stirring devices are horizontally arranged inside the mixing and stirring cabin, and the installation directions of the two-stage sediment mixing and stirring devices are opposite.

[0007] In this device, the traction device is arranged at the front part of the capture ship main body. The traction cable of the traction device is connected to the front end of the sediment collection and crushing system through a square vertical frame pulley group. The lifting device is arranged on one side of the middle part of the capture ship main body. A gantry crane is arranged on the platform of the capture ship main body. The traction cable of the lifting device passes through the positioning pulley on the gantry crane and is connected to the upper part of the sediment collection and crushing system.

[0008] In a preferred scheme, the front part of the first hollow counterweight cabin is inclined, and the bottom surface is flat. A uniformly vertically arranged grid bar and a trapezoidal mud scraping groove are arranged in sequence between the first hollow counterweight cabin and the mixing and stirring cabin.

[0009] Furthermore, the grid bar is narrow at the front and wide at the back. The trapezoidal mud scraping groove is connected with a hydraulic arm, and the opening angle of the trapezoidal mud scraping groove is adjusted through the hydraulic arm.

[0010] In this device, the top of the mixing and stirring cabin is of an arched structure. Machine seats are fixed on both sides of the mixing and stirring cabin, and an underwater transmission system is installed on the machine seats. A diversion partition is arranged between the two-stage sediment mixing and stirring devices. A plurality of rotary crushing blades at different angles are fixed on the transmission shaft of the sediment mixing and stirring device, and the adjacent rotary crushing blades are arranged staggeredly.

[0011] Guide chutes are arranged along the inner sides of the front part of the capture ship main body. Limit blocks are arranged in the two side guide chutes. Positioning blocks are arranged at both ends of the primary sieve. The positioning blocks can be embedded into the limit blocks, and the primary sieve can be fixed at different heights of the guide chutes through the engagement of the limit blocks and the positioning blocks.

[0012] Furthermore, positioning guide grooves are also arranged on the two inner sides of the middle part of the capture ship main body, and the sediment collection and crushing system can move up and down along the positioning guide grooves.

[0013] A slurry pump is arranged inside the sediment suction cabin for transporting the mud-water mixture to the required sediment transport ship.

[0014] Preferably, a control cabin and a generator set for providing power are also arranged at the tail of the capture ship main body, and a sonar imaging system is arranged in the control cabin.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The present invention has extremely high positioning accuracy and excavation accuracy. For the complex terrain at the bottom of the lake, the thickness of the silt layer is obtained through the silt depth detector system, and the opening angle of the trapezoidal sludge scraping groove is adjusted by the hydraulic device to capture the bottom mud rich in pollutants. The fishing efficiency is high, and at the same time, secondary pollution during the dredging process is avoided, meeting the requirements of environmental protection dredging;

[0017] 2. The sonar imaging system set in the control cabin can synchronously and real - time display the underwater three - dimensional scan image and high - resolution echo, and present the underwater terrain through the unique three - dimensional stereo sonar imaging system. During the forward movement of the bottom mud capture ship, for the detected complex terrain and large underwater obstacles, it can give a pre - warning. After receiving the feedback signal, it stops moving forward or turns to avoid the capture ship hitting the obstacle, ensuring the safety of the work;

[0018] 3. Both the front and rear ends of the main body of the capture ship are provided with hollow counterweight cabins, which maintain the balance of the main body of the capture ship in the lake by injecting or discharging water. The hollow counterweight cabins move forward smoothly with the hull through the front traction cable and the upper hull traction cable, and the dredging is without disturbance;

[0019] 4. The mud collection and crushing system can be lifted by the electric lifting device during maintenance or when stopping work, which is convenient for operation and maintenance;

[0020] 5. The two - stage bottom mud mixing and stirring device can fully mix and crush the bottom mud. At the same time, the top of the mixing and stirring cabin is in an arched structure, leaving enough space between the blades, which can prevent the larger sand and gravel mixed in the bottom mud from jamming the rotating crushing blades during the crushing process. The larger sundries in the bottom mud are crushed, and the residual sand and gravel are led to the sand discharge port through the internal hydraulic diversion for regular discharge. The bottom mud after crushing, mixing and removing impurities is conducive to the suction and transportation of the mud pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the plan view of the present invention;

[0022] Figure 2 is the elevation view of the present invention;

[0023] Figure 3 is the plan view of the mud collection and crushing system in the present invention;

[0024] Figure 4 is the elevation view of the mud collection and crushing system in the present invention;

[0025] In the figure: 1 - capture ship main body; 2 - mud collection and crushing system; 3 - traction device; 4 - square vertical frame pulley group; 5 - lifting device; 6 - gantry crane; 7 - positioning pulley; 8 - guiding chute; 9 - limit block; 10 - positioning block; 11 - primary sieve; 12 - positioning guiding groove; 13 - sonar imaging system; 14 - first hollow counterweight cabin; 15 - trapezoidal mud scraping groove; 16 - grid bars; 17 - mixing and stirring cabin; 18 - bottom mud mixing and stirring device; 19 - underwater drive system; 20 - rotary crushing blade; 21 - bottom mud suction cabin; 22 - slurry pump; 23 - second hollow counterweight cabin; 24 - generating set; 25 - silt depth detection system; 26 - movable telescopic support; 27 - ultrasonic probe; 28 - hydraulic arm; 29 - hydraulic station; 30 - diversion partition plate. Detailed implementation manners

[0026] The present invention will be further described below in conjunction with the accompanying drawings:

[0027] As Figures 1-4 shown, the present invention includes a capture ship main body 1, a mud collection and crushing system 2, and a silt depth detection system 25. The capture ship main body 1 is a split hull. The mud collection and crushing system 2 is arranged inside the hull of the capture ship main body 1 through a traction device 3 and a lifting device 5. The silt depth detection system 25 includes a movable telescopic support 26 and an ultrasonic probe 27. The ultrasonic probe 27 is arranged at the bottom of the capture ship main body 1 through the movable telescopic support 26. A primary sieve 11 extending to the bottom of the lake is installed at the front end of the capture ship main body 1. The mud collection and crushing system 2 includes a first hollow counterweight cabin 14, a mixing and stirring cabin 17, a second hollow counterweight cabin 23, and a bottom mud suction cabin 21 arranged in sequence. Two - stage bottom mud mixing and stirring devices 18 are horizontally arranged inside the mixing and stirring cabin 17, and the installation directions of the two - stage bottom mud mixing and stirring devices 18 are opposite.

[0028] In this device, the capture ship main body 1 is composed of a steel split hull. The mud collection and crushing system 2 is arranged inside the split hull and is connected by a traction cable of the traction device 3 on the upper part of the hull. It sinks into the lake bottom silt by its own weight. When the capture ship main body 1 is driven forward, the mud collection and crushing system 2 moves forward simultaneously.

[0029] Specifically, the outer cover of the mud collection and crushing system 2 is made of stainless steel or carbon steel. The traction device 3 is arranged at the front of the capture ship main body 1. The traction cable of the traction device 3 is connected to the front end of the mud collection and crushing system 2 through a square vertical frame pulley group 4. The lifting device 5 is arranged on one side in the middle of the capture ship main body 1 and is an electric lifting device. A gantry crane 6 is arranged on the platform of the capture ship main body 1. The traction cable of the lifting device 5 passes through the positioning pulley 7 on the gantry crane 6 and is connected to the upper part of the mud collection and crushing system 2.

[0030] The front part of the mud collecting and crushing system 2 is the first hollow counterweight cabin 14. The front part of the first hollow counterweight cabin 14 is of an inclined plane structure, welded on both sides with steel plates and at the top, and the bottom surface is a flat mud pressing plate. The front end protrudes upward, and the rear part is flat and attached to the lake bottom. The baffle plates on both sides prevent the bottom mud from escaping from both sides of the first hollow counterweight cabin 14 during the forward movement, compacting and pressing the semi-suspended bottom mud on the lake bottom. Its counterweight is implemented by adjusting the water level in the cabin. Between the first hollow counterweight cabin 14 and the mixing and stirring cabin 17, there are arranged vertical grid bars 16 and trapezoidal mud scraping grooves 15 in sequence. The bottom mud compacted by the first hollow counterweight cabin 14 enters the mixing and stirring cabin 17 after being further blocked and screened for impurities by the vertical grid bars 16 uniformly arranged in front of the inclined trapezoidal mud scraping groove 15. The grid bars 16 are narrow at the front and wide at the rear, facilitating the cutting of the bottom mud. The trapezoidal mud scraping groove 15 is connected with a hydraulic arm 28. The hydraulic arm 28 adjusts the opening angle of the trapezoidal mud scraping groove 15 by pushing the adjusting plates on both sides of the trapezoidal mud scraping groove 15, and then adjusts the thickness of the bottom mud layer scooped up. Its angle is adjusted according to the feedback of the silt depth detection system 25 to ensure that the required bottom mud is collected. At the same time, a hydraulic station 29 is also provided on the platform of the capture ship main body 1, and the hydraulic station 29 is connected with the hydraulic arm 28.

[0031] In a preferred solution, positioning and guiding grooves 12 are also arranged on the inner sides of the middle part of the capture ship main body 1. The mud collecting and crushing system 2 can move up and down along the positioning and guiding grooves 12, and the whole is of carbon steel structure.

[0032] Guiding sliding grooves 8 are arranged along the inner sides of the front part of the capture ship main body 1. Limit blocks 9 are arranged in the two guiding sliding grooves 8 on both sides. Positioning blocks 10 are arranged at both ends of the preliminary sieve 11. The positioning blocks 10 can be embedded in the limit blocks 9. The preliminary sieve 11 can be fixed at different heights of the guiding sliding grooves 8 through the engagement of the limit blocks 9 and the positioning blocks 10.

[0033] The top of the mixing and stirring cabin 17 is of an arched structure. Machine seats are fixed on both sides of the mixing and stirring cabin 17. An underwater transmission system 19 is installed on the machine seats. A plurality of rotating crushing blades 20 at different angles are fixed on the transmission shaft of the bottom mud mixing and stirring device 18. The adjacent rotating crushing blades 20 are arranged staggeredly. Through the rapid rotation of the underwater transmission system 19, the bottom mud scooped up by the trapezoidal mud scraping groove 15 is fully mixed and dispersed, and the sand and gravel in it are broken into fine particles. A diversion partition plate 30 is arranged between the two-stage bottom mud mixing and stirring devices 18, so that the bottom mud flows to the second-stage bottom mud mixing and stirring device 18 after being crushed and dispersed by the first-stage bottom mud mixing and stirring device 18, and is fully mixed and crushed. The fine sand and gravel in the bottom mud accumulate at the discharge port on the side wall due to the slower flow rate. By regularly opening the discharge port, the sand and gravel are discharged from the mixing and stirring cabin 17. Sufficient gaps are left at the bottom and top of the mixing and stirring cabin 17 of the arched structure to prevent the larger sand and gravel mixed in the bottom mud from jamming the rotating crushing blades 20 during the crushing process and ensure stable operation.

[0034] The rear part of the mixing and stirring tank 17 is the second hollow counterweight tank 23. By filling water into the first hollow counterweight tank 14 and the second hollow counterweight tank 23, the front and rear counterweights of the sludge collecting and crushing system 2 are balanced, enabling it to maintain balance on the lake bottom and advancing smoothly with the hull through the front towing cable and the upper hull towing cable.

[0035] Furthermore, a slurry pump 22 is provided inside the sludge suction tank 21 for transporting the mud-water mixture to the required sludge transport ship. The slurry pump 22 is a large-flow non-clogging slurry pump, facilitating the suction of a large amount of sludge.

[0036] In this device, the sludge depth detection system 25 includes a movable telescopic bracket 26 and an ultrasonic probe 27. The ultrasonic probe 27 is arranged at the bottom of the capture ship main body 1 through the movable telescopic bracket 26. The ultrasonic probe 27 is inserted into the bottom mud, and the signal is transmitted to the control system through the signal cable to obtain the thickness of the sludge layer, thereby adjusting the opening angle of the trapezoidal sludge scraping groove 15.

[0037] At the tail of the capture ship main body 1, there is also a control cabin and a generator set 24 for providing power. The generator set 24 can be a diesel generator set. A sonar imaging system 13 is provided in the control cabin. The sonar imaging system 13 can synchronously and real-time display the underwater three-dimensional scan image and high-resolution echo, and present the underwater terrain through the unique three-dimensional stereo sonar imaging system. During the forward movement of the capture ship, if complex terrain or large underwater obstacles are detected, an early warning is given in advance. After receiving the feedback signal, it stops moving forward or turns to avoid the bottom mud capture ship hitting the obstacles, ensuring the safety of the bottom mud capture work.

[0038] The usage process of the present invention is as follows:

[0039] When the capture ship main body 1 advances, the first hollow counterweight tank 14 at the front of the sludge collecting and crushing system 2 compacts and tightens the bottom mud semi-suspended on the lake bottom. The compacted bottom mud enters the mixing and stirring tank 17 after being blocked and screened for impurities by the grid bars 16 at the front end of the trapezoidal sludge scraping groove 15, and is fully mixed and dispersed by the two-stage bottom mud mixing and stirring device 18. The sand and gravel in it are broken into fine particles, thus completing the non-disturbing and uniform shoveling and collection of the lake bottom sludge. The mud-water mixture after two-stage crushing flows to the sludge suction tank 21, and the slurry pump 22 provided inside it transports the mud-water mixture to the sludge transport ship for the next step of resource utilization.

[0040] When the capture ship is advancing, the sonar imaging system 13 can synchronously and real-time display the underwater three-dimensional scan image, present the underwater terrain through the unique three-dimensional stereo sonar imaging system and send out signals. After receiving the feedback signal, the capture ship stops moving forward or turns, ensuring the efficiency and safety of the fishing work.

[0041] Other processes of the present invention can adopt the existing technology.

[0042] The best embodiments of the present invention have been illustrated, and further extensions made by those of ordinary skill in the art to the present invention all fall within the protection scope of the present invention.

Claims

1. An intelligent on-line sediment capture and dredging device for lakes, characterized in that It includes a capture ship main body (1), a sludge collection and crushing system (2), and a sludge depth detection system (25). The capture ship main body (1) is a split hull. The sludge collection and crushing system (2) is arranged inside the hull of the capture ship main body (1) through a traction device (3) and a lifting device (5). The sludge depth detection system (25) includes a movable telescopic support (26) and an ultrasonic probe (27). The ultrasonic probe (27) is arranged at the bottom of the capture ship main body (1) through the movable telescopic support (26). An initial sieve (11) extending to the lake bottom is installed at the front end of the capture ship main body (1). The sludge collection and crushing system (2) includes a first hollow counterweight cabin (14), a mixing and stirring cabin (17), a second hollow counterweight cabin (23), and a bottom sludge suction cabin (21) arranged in sequence. Two-stage bottom sludge mixing and stirring devices (18) are horizontally arranged inside the mixing and stirring cabin (17), and the installation directions of the two-stage bottom sludge mixing and stirring devices (18) are opposite.

2. The intelligent on-line sediment capture and dredging device for lakes according to claim 1, characterized in that The traction device (3) is arranged at the front part of the capture ship main body (1). The traction cable of the traction device (3) is connected to the front end of the sludge collection and crushing system (2) through a square vertical frame pulley group (4). The lifting device (5) is arranged on one side of the middle part of the capture ship main body (1). A gantry crane (6) is arranged on the platform of the capture ship main body (1). The traction cable of the lifting device (5) passes through a positioning pulley (7) on the gantry crane (6) and is connected to the upper part of the sludge collection and crushing system (2).

3. The intelligent on-line sediment capture and dredging device for lake bottom according to claim 1, characterized in that The front part of the first hollow counterweight cabin (14) is inclined, and the bottom surface is flat. A grid bar (16) arranged vertically and evenly and a trapezoidal sludge scraping groove (15) are arranged in sequence between the first hollow counterweight cabin (14) and the mixing and stirring cabin (17).

4. The intelligent on-line sediment capture and dredging device for lake bottom according to claim 3, wherein The grid bar (16) is narrow at the front and wide at the back. The trapezoidal sludge scraping groove (15) is connected to a hydraulic arm (28), and the opening angle of the trapezoidal sludge scraping groove (15) is adjusted through the hydraulic arm (28).

5. The intelligent on-line lake sediment capturing and dredging device according to claim 1, characterized in that Guide chutes (8) are arranged along the inner sides of the front part of the capture ship main body (1). Limit blocks (9) are arranged in the two guide chutes (8) on both sides. Positioning blocks (10) are arranged at both ends of the initial sieve (11). The positioning blocks (10) can be embedded in the limit blocks (9). The initial sieve (11) can be fixed at different heights of the guide chutes (8) through the engagement of the limit blocks (9) and the positioning blocks (10).

6. The intelligent on-line lake sediment capturing and dredging device according to claim 2, characterized in that Positioning guide grooves (12) are also arranged on the inner sides of the middle part of the capture ship main body (1). The sludge collection and crushing system (2) can move up and down along the positioning guide grooves (12).

7. The intelligent on-line sediment capture and dredging device for lake bottom according to claim 1, characterized in that A mud pump (22) is arranged inside the bottom sludge suction cabin (21) for transporting the mud-water mixture to the required bottom sludge transport ship.

8. The intelligent on-line sediment capture and dredging device for lake bottom according to claim 1, characterized in that A control cabin and a generator set (24) for providing power are also arranged at the tail of the capture ship main body (1). A sonar imaging system (13) is arranged in the control cabin.

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