Underwater high-concentration sludge conveying system and method

Abstract

The invention discloses an underwater high-concentration sludge conveying system and method, and relates to the technical field of water area desilting. Comprising a carrier, a sludge mixing box, a screening device and a sludge conveying assembly, the sludge mixing box is installed at the bow of the carrier and used for mixing water and sludge, the screening device is arranged on one side of the sludge mixing box and used for removing stone particles in the sludge, and the sludge conveying assembly is connected with the screening device and used for conveying the sludge to the tail of the carrier. A mixing paddle and a water pumping pipe are arranged at the sludge mixing box, the water pumping pipe conveys water into the sludge mixing box, and the water and the sludge are stirred into a sludge-water mixture through stirring of the mixing paddle. Through the arrangement of the mud mixing box and the like, high-concentration sludge is stirred in the mud mixing box, and water and the sludge are mixed, so that the viscosity and the solid particle content of the sludge are reduced, the damage to a pump body is reduced, and the resistance in a pipeline is also reduced in the subsequent pipeline conveying process, so that the mud can flow more smoothly.

Description

Technical Field

[0001] The present invention relates to the technical field of water area dredging, and in particular to an underwater high-concentration sludge conveying system and method. Background Art

[0002] Long-term water erosion and garbage accumulation lead to the continuous accumulation of underwater silt, which shallows rivers, lakes, reservoirs, and other water bodies, reduces their cross-sectional area, and reduces their flood-carrying capacity. During heavy rainfall and other precipitation events during the flood season, these events can easily trigger floods, threatening the lives and property of surrounding residents. Removing highly concentrated underwater silt can deepen rivers and other water bodies, expand their cross-sectional area, and improve their flood-carrying and discharge capacity, effectively reducing the risk of floods and ensuring flood control safety.

[0003] However, when dredging waters containing high-concentration silt, the high-concentration silt will generate greater resistance when transported in the pipeline due to its high viscosity and solid particle content. It is necessary to accurately calculate the resistance loss of the pipeline to determine the required pumping pressure. In addition, since the transportation pipeline is long, the solid particles in the high-concentration silt are also prone to sedimentation in the pipeline, causing pipeline blockage. To address this situation, the present invention proposes a new solution. Summary of the Invention

[0004] The object of the present invention is to provide an underwater high-concentration sludge transportation system and method to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: an underwater high-concentration sludge transportation system, comprising: Carriers, mud boxes, screening devices and sludge conveying components; The mud mixing box is installed at the bow of the carrier to mix water and silt. The screening device is set on one side of the mud mixing box to remove stone particles in the silt. The silt conveying assembly is connected to the screening device to convey the silt to the tail of the carrier. The mud mixing box is provided with a mixing paddle and a water pump pipe. The water pump pipe transports water to the mud mixing box and the water and sludge are stirred into a mud-water mixture through the stirring of the mixing paddle. The mud mixing box is also provided with an extraction pipe. The mud-water mixture is guided by the extraction pipe through the screening device and transferred to the sludge conveying component.

[0006] Furthermore, regarding this solution, the bow of the carrier is provided with a slotted opening structure for facilitating the installation of the auger arm. The auger arm is installed at the slotted opening structure and can rotate around the hinge point. A spiral auger and a driving source 1 for driving the spiral auger are provided on the auger arm. The water transport vehicle controls the rotation of the spiral auger through the driving source 1 to crush the underwater coagulated silt. A sludge pump is also installed on the auger arm. A first-stage mud pumping pipe is provided between the sludge pump and the spiral auger. The crushed silt is sucked into the first-stage mud pumping pipe by the sludge pump. A second-stage mud pumping pipe is also provided at the output end of the sludge pump, and the silt is transported to the mud mixing box through the second-stage mud pumping pipe.

[0007] Furthermore, regarding this solution, the top of the mud mixing box is opened, the bracket is installed at the mud mixing box, and the two ends of the bracket are located on both sides of the slot opening of the carrier. A rotating shaft is rotatably installed at the center of the top of the bracket. After the second-stage mud pumping pipe passes through the rotating shaft, its unloading end is located directly above the mud mixing box. A limiting sleeve is also fixed between the brackets, and the second-stage mud pumping pipe passes through the limiting sleeve after passing through the rotating shaft.

[0008] Furthermore, regarding this solution, a bearing is provided at one end of the mud box away from the second driving source, one end of the mixing paddle is fixed to the inner wall of the bearing, a perforation is provided at the end where the mixing paddle is connected to the inner wall of the bearing, a water pump pipe is provided at the perforation, one end of the water pump pipe passes through the perforation and the discharge end is located inside the mixing paddle.

[0009] Furthermore, regarding this solution, a mud pumping hole and a mud filling hole are respectively provided at the bottom of the mud mixing box, wherein the mud pumping hole is vertically arranged and the feed end of the extraction pipe is connected to the mud pumping hole, one end of the mud filling hole is connected to the interior of the mud mixing box, and the other end is connected to the mud pumping hole, and a booster pump connected to the mud pumping hole is installed at the bottom of the mud mixing box for pressurization.

[0010] Furthermore, regarding this solution, the screening device includes a screen bucket installed on one side of the mud box, wherein the discharge end of the extraction pipe is located directly above the screen bucket, and a row of strip grooves is provided at the bottom of the screen bucket. One end of the screen bucket extends outward to the outside of the deck of the carrier, and the screen bucket is also tilted at an angle of 5°-35°. A funnel is also provided below the screen bucket, and the top of the funnel is opened and the width is at least greater than the width of the screen bucket.

[0011] Furthermore, regarding this solution, the mud conveying assembly includes an output pipe, one end of which is connected to the bottom of the funnel, and a relay pump is installed at the other end of the output end. The output end of the relay pump is connected to a conveying pipe, and the conveying pipe is connected to the tail of the watercraft. The mud mixture received by the funnel is conveyed to the tail of the watercraft through the relay pump, and an openable and closable observation port is provided on the output pipe.

[0012] Furthermore, the solution is further developed. A branch pipe is provided at one end of the delivery pipe close to the relay pump. The branch pipe is inclined in the direction of the relay pump. A pipe wall dredging member is provided at the branch pipe. The pipe wall dredging member includes a steel chain. A dredging structure is provided at the end of the steel chain. The dredging structure includes a hoop. The hoop is coaxially arranged with the delivery pipe and rubber rings are welded at high temperature on both sides of the hoop. The rubber rings are tightly attached to the inner wall of the delivery pipe. Multiple ribs are fixed on one side of the hoop. The other end of the rib is welded and fixed at the axis of the hoop. A ring is provided at the welded position. A hook is provided at one end of the steel chain. The hook is hung on the ring. At the same time, a fin is provided on the side of the hoop away from the rib to increase resistance. Two supporting plates are installed on the carrier, a winding roller is rotatably installed between the two supporting plates, and one end of the steel chain away from the dredging structure is installed on the winding roller.

[0013] Furthermore, with respect to this solution, a hanger is provided at the top of the bracket, a reel is installed at the hanger, and a sling for lifting the auger boom is wound around the reel.

[0014] An underwater high-concentration sludge transportation method, using the underwater high-concentration sludge transportation system according to any one of claims 1 to 5, is characterized in that it includes the following steps: Step 1: The cutter rotates to crush the bottom silt, and the sludge pump sucks the high-concentration sludge into the sludge mixing box through the first-stage sludge pump pipe and the second-stage sludge pump pipe; Step 2: Pump water from a nearby source into the mud mixing tank through a water pump pipe and mix the water and sludge; Step 3: Pump the mud-water mixture into the screen bucket through the extraction pipe, and remove hard particles such as stones in the screen bucket; Step 4: The mud-water mixture after the particles are removed is transported to the tail end of the water transport vehicle through a relay pump.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The underwater high-concentration sludge conveying system and method reduces the viscosity of the high-concentration sludge in the mud mixing box by setting up a mud mixing box, and reduces the viscosity and solid particle content of the sludge by mixing water and sludge. In this way, during the subsequent pipeline transportation process, the resistance in the pipeline is reduced, allowing the mud to flow more smoothly. Compared with directly conveying high-concentration sludge, the energy consumption required for pumping is reduced and the transportation efficiency is improved.

[0016] At the same time, a screening device is set up at the mud box to remove hard particles such as stones in the silt through the screen bucket, which effectively avoids the blockage problem that may be caused by hard particles when transporting in the pipeline, protects the pipeline and subsequent transportation equipment, and the dredging structure in the pipe wall dredging parts can move back and forth in the conveying pipe to clean the pipe wall. This dynamic cleaning method can promptly remove the silt adhering to the pipe wall, prevent the silt from gradually accumulating and causing the cross-sectional area of the pipeline to decrease, and eventually cause blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the left-side structure of the present invention; Figure 3 This is a schematic diagram of the side tilt viewing angle structure of the present invention; Figure 4 It is a schematic cross-sectional structure diagram of the mud mixing box and screening device of the present invention; Figure 5 It is a schematic diagram of the dredging structure of the present invention.

[0018] Figure: 1, carrier; 2, auger boom; 3, spiral auger; 4, driving source 1; 5, first-stage mud pump pipe; 6, mud pump; 7, second-stage mud pump pipe; 8, bracket; 9, bearing shaft; 10, limit sleeve; 11, mud mixing box; 12, mixing paddle; 13, driving source 2; 14, water pump pipe; 15, bearing; 16, extraction pipe; 161, mud pump hole; 162, mud filling hole; 163, booster pump; 17, screen Bucket; 18. Funnel; 19. Output pipe; 20. Observation port; 21. Relay pump; 22. Delivery pipe; 23. Branch pipe; 24. Support plate; 25. Winding roller; 26. Pipe wall desilting parts; 261. Steel chain; 262. Hook; 263. Hoop; 264. Rubber ring; 265. Reinforced rod; 266. Ring; 267. Fin; 27. Drive source three; 28. Hanger; 29. Reel; 30. Sling. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] In order to facilitate the installation of the auger arm 2, the bow of the carrier 1 is set to a slot-shaped opening structure. The auger arm 2 is installed at the slot-shaped opening structure and can rotate around the hinge point. The auger arm 2 is provided with a spiral auger 3 and a driving source 4 for driving the spiral auger 3. The water transport vehicle controls the rotation of the spiral auger 3 through the driving source 4 to crush the underwater solidified silt. A sludge pump 6 is also installed on the auger arm 2. A first-stage mud pumping pipe 5 is provided between the sludge pump 6 and the spiral auger 3. The crushed silt is sucked into the first-stage mud pumping pipe 5 through the sludge pump 6. A second-stage mud pumping pipe 7 is also provided at the output end of the sludge pump 6. The second-stage mud pumping pipe 7 is a hose. The silt is transported to the carrier 1 through the second-stage mud pumping pipe 7, and the silt is transported to the tail of the water transport vehicle through the silt transport system on the water transport vehicle. When it is relatively far away from the shore, the silt is transported to the shore through a relay pump station. This technology is relatively mature and will not be described here.

[0021] like Figure 1 As shown, the present invention provides a technical solution: an underwater high-concentration sludge conveying system and method, comprising a mud mixing box 11, a bracket 8, and a sludge conveying assembly for conveying sludge to the tail of a watercraft. The mud mixing box 11 is installed at the bow of the carrier 1 and spans the slot-shaped opening. The high-concentration sludge conveyed up through the second-stage mud pump pipe 7 is first transferred to the mud mixing box 11. The mud mixing box 11 can draw water from lakes / rivers / ponds, etc. After receiving the water source and sludge at the mud mixing box 11, the water and sludge are mixed at the mud mixing box 11 to reduce the viscosity of the sludge. By reducing the viscosity of the sludge, the conveying pressure of the pipeline sludge is reduced. After the sludge is stirred at the mud mixing box 11, the stirred sludge is conveyed to the tail of the watercraft through the sludge conveying assembly, thereby reducing the load on the pipeline conveying sludge.

[0022] like Figure 2 and Figure 3As shown, in order to ensure the smooth implementation of the above embodiment, it is necessary to understand that the top opening of the mud box 11 is set, the bracket 8 is installed at the mud box 11, and the two ends of the bracket 8 are located on both sides of the slot opening of the carrier 1. A bearing shaft 9 is rotatably installed at the center of the top of the bracket 8. After the second-stage mud pumping pipe 7 passes through the bearing shaft 9, its discharge end is located directly above the mud box 11. A limiting sleeve 10 is also fixed between the brackets 8. After the second-stage mud pumping pipe 7 passes through the bearing shaft 9, it passes through the limiting sleeve 10. The limiting sleeve 10 can be used to limit the second-stage mud pumping pipe 7 That is to say, the silt falls into the box from just above the mud mixing box 11. During the rotation of the reamer arm 2, the height position of the output end of the second-stage pump mud pipe 7 will change, but it will always rotate just above the mud mixing box 11 to ensure that the silt can smoothly enter the mud mixing box 11. A mixing paddle 12 is installed in the mud mixing box 11. The mixing paddle 12 is a box-type stirring paddle. The mixing paddle 12 is a cylindrical box body with sheet blades all around. In this embodiment, the mixing paddle 12 can be a paddle-type stirring paddle, a spiral-belt stirring paddle, a turbine stirring paddle, etc. A driving source 2 13 for driving the mixing paddle 12 to rotate is also installed at one end of the mud box 11, and a bearing 15 is provided at the end of the mud box 11 away from the driving source 2 13. One end of the mixing paddle 12 is fixed to the inner wall of the bearing 15. A perforation is provided at the end where the mixing paddle 12 is connected to the inner wall of the bearing 15. A pump pipe 14 is provided at the perforation. The pump pipe 14 is connected to a submersible pump or a floor-standing water suction pump, etc., for drawing water from a nearby water source. One end of the pump pipe 14 passes through the perforation and the discharge end is located inside the mixing paddle 12, that is, through the pump pipe 1 The drawn water source is directly poured into the mixing paddle 12, and the silt falls from top to bottom into the mixing box 11, and the silt can cover the mixing paddle 12. When the water is pumped into the mixing paddle 12, the mixing paddle 12 rotates, which can achieve a better cement mixing effect. In addition, the bottom inner wall of the mud box 11 is in an arc shape, which facilitates the accumulation of silt in the middle, and also accelerates the effect of reducing the viscosity of the silt. It should be noted that in order to ensure the mixing effect of water and silt, when the mixing paddle 12 is a spiral agitator or a turbine agitator, the paddle body needs to be adaptively changed.

[0023] like Figure 3 and Figure 4As shown, a suction pipe 16 is also provided at the mud mixing box 11, and the diluted sludge in the mud mixing box is transferred to the sludge conveying assembly through the suction pipe 16. To ensure the smooth implementation of this embodiment, a mud pumping hole 161 and a mud filling hole 162 are respectively opened at the bottom of the mud mixing box 11, wherein the mud pumping hole 161 is vertically arranged and the feed end of the suction pipe 16 is connected to the mud pumping hole 161, one end of the mud filling hole 162 is connected to the interior of the mud mixing box 11, and the other end thereof is connected to the mud pumping hole 161, and a booster pump 163 connected to the mud pumping hole 161 is installed at the bottom of the mud mixing box 11, that is, when the booster pump 163 is working, suction will be generated at the mud filling hole 162 to suck the sludge into the mud pumping hole 161, and under the continuous pressurization state, the sludge will pass through the suction pipe 16 and be discharged, thereby realizing the function of discharging the sludge from the mud mixing box 11.

[0024] like Figure 3 and Figure 4 As shown, before the silt is transported to the silt conveying assembly, the stone particles in the silt are removed by a screening device to reduce the damage to the silt transmission pipeline of the stone. In order to ensure the smooth implementation of the above embodiment, it is necessary to know that the screening device includes a screen bucket 17 installed on one side of the mud box 11, wherein the discharge end of the extraction pipe 16 is located directly above the screen bucket 17, and the bottom of the screen bucket 17 is provided with a row of strip grooves. Compared with the traditional mesh screen structure, the strip groove-shaped screen structure can speed up the passage of silt and allow the blocked stones to roll along the strip grooves to improve the filtering effect, and one end of the screen bucket 17 extends outward until Extending to the outside of the deck of the carrier 1, the silt is pumped out of the extraction pipe 16 by the booster pump 163, that is, the potential energy of the silt is relatively large when it is discharged from the extraction pipe 16, and the silt basically hits the screen of the screen bucket 17, which can increase the speed of the silt passing through the screen bucket 17 and reduce the accumulation effect. The screen bucket 17 is also tilted at an angle of 5°-35°. The stones accumulated on the screen bucket 17 are discharged from the screen bucket 17 to the carrier 1 under the action of gravity. A funnel 18 is also provided below the screen bucket 17. The top of the funnel 18 is opened and the width is at least greater than the width of the screen bucket 17 so that it can catch all the silt passing through the screen bucket 17.

[0025] Replay Figure 2 and Figure 3To ensure the smooth implementation of the above embodiment, it is necessary to understand that the sludge conveying assembly includes an output pipe 19, one end of the output pipe 19 is connected to the bottom of the funnel 18, and a relay pump 21 is installed at the other end of the output end. The output end of the relay pump 21 is connected to a conveying pipe 22, and the conveying pipe 22 is connected to the tail of the watercraft. The relay pump 21 is a mud pump or a paddle pump that can be used for conveying mud mixtures. The mud mixture received by the funnel 18 is conveyed to the tail of the watercraft through the relay pump 21. An openable and closable observation port 20 is provided on the output pipe 19, which can be used to observe the condition of the mud mixture inside the output pipe 19.

[0026] like Figure 3 and Figure 5As shown, a branch pipe 23 is provided at one end of the delivery pipe 22 close to the relay pump 21. The branch pipe 23 is inclined toward the direction of the relay pump 21. A pipe wall dredging member 26 is provided at the branch pipe 23. The pipe wall dredging member 26 includes a steel chain 261. A dredging structure is provided at the end of the steel chain 261. The dredging structure includes a hoop 263. The hoop 263 is coaxially arranged with the delivery pipe 22 and rubber rings 264 are welded at high temperature on both sides of the hoop 263. The rubber ring 264 is tightly attached to the inner wall of the delivery pipe 22. A plurality of ribs 265 are fixed on one side of the hoop 263. The other end of the rib 265 is fixed at The hoop 263 is welded and fixed at the axis, and a ring 266 is provided at the welded position. A hook 262 is provided at one end of the steel chain 261, and the hook 262 is hung on the ring 266. At the same time, a fin 267 is provided on the side of the hoop 263 away from the rib 265 to increase resistance. Through the setting of the dredging structure, the inner wall of the conveying pipe 22 can be dredged to reduce the situation where silt adheres to the wall of the conveying pipe 22. When the relay pump 21 conveys the mud mixture to the tail of the carrier 1, the mud mixture in the conveying pipe 22 moves quickly. In this case, the dredging structure will always have a tendency to move toward the tail end of the watercraft under the impact of the mud mixture. In this process, the end of the steel chain 261 away from the dredging structure is used to pull the dredging structure. When the traction force is weak, or the traction force given to the dredging structure by the other end of the steel chain 261 cannot offset the resistance given to the dredging structure by the mud mixture, the dredging structure will move toward the tail end of the watercraft under the impact of the mud mixture, and stick to the pipe wall during the movement to wipe off the sticky matter on the pipe wall. Similarly, when the other end of the steel chain 261 gives the dredging structure traction When the force is greater than the resistance of the dredging structure, the dredging structure will move toward one end of the relay pump 21 under the traction effect. In this way, the dredging structure moves back and forth to clean the pipe wall. The dredging structure is tapered as a whole, and the dredging structure is in contact with the pipe wall only through the rubber rings 264 on both sides of the hoop 263. Therefore, when the dredging structure is tapered as a whole, the rubber rings 264 can always be in contact with the pipe wall while maintaining a relatively small friction, which can ensure that the dredging structure moves smoothly in the conveying pipe 22 while maintaining a stable posture of the dredging structure. like Figure 3 As shown, in order to achieve traction of the dredging structure, two support plates 24 are installed on the carrier 1, and a winding roller 25 is rotatably installed between the two support plates 24. The end of the steel chain 261 away from the dredging structure is installed on the winding roller 25, and the winding of the steel chain 261 is achieved by the rotation of the winding roller 25. A driving source three 27 is installed on one side of one of the support plates 24, and the winding roller 25 is controlled by the driving source three 27.

[0027] like Figure 3As shown, a hanger 28 is provided at the top of the bracket 8, and a reel 29 is installed on the hanger 28. A sling 30 for lifting the auger arm 2 is wound on the reel 29. The angle of the auger arm 2 is adjusted by winding the reel 29, which is used to clear silt from the bottom of the water.

[0028] Based on the above embodiment, we provide a high-concentration sludge transportation method applicable to the sludge transportation system, comprising the following steps: 1. The auger rotates to crush the bottom silt, and the sludge pump 6 sucks the high-concentration sludge into the sludge mixing box 11 through the first-stage sludge pumping pipe 5 and the second-stage sludge pumping pipe 7; Second, draw water from a nearby source through the pump pipe 14 into the mud mixing box 11 and mix the water and sludge; 3. The mud-water mixture is pumped into the screen bucket 17 through the extraction pipe 16, and hard particles such as stones are removed in the screen bucket 17; Fourth, the mud-water mixture after the particles are removed is transported to the tail of the water vehicle through the relay pump 21.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is limited by the accompanying embodiments and their equivalents.

Claims

1. An underwater high-concentration sludge transportation system, characterized in that: include: Carrier (1), mud box (11), screening device and sludge conveying assembly; The mud mixing box (11) is provided with a mixing paddle (12) and a water pump pipe (14). The water pump pipe (14) transports water into the mud mixing box (11) and stirs the water and sludge into a mud-water mixture through the stirring of the mixing paddle (12). The mud mixing box (11) is also provided with an extraction pipe (16). The mud-water mixture is guided by the extraction pipe (16) through the screening device and transferred to the sludge conveying component. The screening device includes a screen bucket (17) installed on one side of the mud box (11), wherein the discharge end of the extraction pipe (16) is located directly above the screen bucket (17), and a row of strip grooves is provided at the bottom of the screen bucket (17), and one end of the screen bucket (17) extends outward to the outside of the deck of the carrier (1); The conveying assembly includes an output pipe (19) and a conveying pipe (22) connected to the output pipe (19). The output pipe (19) is connected to the screening device, and the silt passing through the mud box (11) and the screening device reduces the pipeline conveying pressure in the output end (19) and the conveying pipe (22).

2. The underwater high-concentration sludge conveying system according to claim 1, characterized in that: The fore portion of the carrier (1) is provided with a slotted opening structure for facilitating installation of a auger arm (2). The auger arm (2) is installed at the slotted opening structure and can rotate around a hinge point. A spiral auger (3) and a driving source (4) for driving the spiral auger (3) are provided on the auger arm (2). The water transport vehicle controls the rotation of the spiral auger (3) by the driving source (4) to crush underwater silt. A sludge pump (6) is also provided on the auger arm (2). A first-stage mud pumping pipe (5) is provided between the sludge pump (6) and the spiral auger (3). The crushed silt is sucked into the first-stage mud pumping pipe (5) by the sludge pump (6). A second-stage mud pumping pipe (7) is also provided at the output end of the sludge pump (6). The silt is transported to the mud mixing box (11) through the second-stage mud pumping pipe (7).

3. The underwater high-concentration sludge conveying system according to claim 2, characterized in that: The top of the mud mixing box (11) is opened, and the bracket (8) is installed at the mud mixing box (11), and the two ends of the bracket (8) are located on both sides of the slot opening of the carrier (1). A bearing shaft (9) is rotatably installed at the center of the top of the bracket (8). After the second-stage mud pumping pipe (7) passes through the bearing shaft (9), its discharge end is located directly above the mud mixing box (11). A limiting sleeve (10) is also fixed between the brackets (8), and the second-stage mud pumping pipe (7) passes through the limiting sleeve (10) after passing through the bearing shaft (9).

4. The underwater high-concentration sludge conveying system according to claim 1, characterized in that: A bearing (15) is provided at one end of the mixing box (11) away from the second driving source (13), one end of the mixing paddle (12) is fixed to the inner wall of the bearing (15), and a through-hole is provided at one end of the mixing paddle (12) connected to the inner wall of the bearing (15), a water pump pipe (14) is provided at the through-hole, one end of the water pump pipe (14) passes through the through-hole and the discharge end is located inside the mixing paddle (12).

5. The underwater high-concentration sludge conveying system according to claim 1, characterized in that: The bottom of the mud mixing box (11) is respectively provided with a mud pumping hole (161) and a mud filling hole (162), wherein the mud pumping hole (161) is vertically arranged and the feed end of the extraction pipe (16) is connected to the mud pumping hole (161), one end of the mud filling hole (162) is connected to the interior of the mud mixing box (11), and the other end thereof is connected to the mud pumping hole (161), and a booster pump (163) connected to the mud pumping hole (161) is installed at the bottom of the mud mixing box (11) for boosting.

6. The underwater high-concentration sludge conveying system according to claim 1, characterized in that: The screen hopper (17) is tilted at an angle of 5°-35°. A funnel (18) is further provided below the screen hopper (17). The funnel (18) has an opening at the top and a width at least greater than that of the screen hopper (17).

7. The underwater high-concentration sludge conveying system according to claim 6, characterized in that: One end of the output pipe (19) is connected to the bottom of the funnel (18), and a relay pump (21) is installed at the other end of the output end. The output end of the relay pump (21) is connected to the delivery pipe (22), and the delivery pipe (22) is connected to the tail of the watercraft. The mud mixture received by the funnel (18) is delivered to the tail of the watercraft through the relay pump (21). An openable and closable observation port (20) is provided on the output pipe (19).

8. The underwater high-concentration sludge conveying system according to claim 1, characterized in that: A branch pipe (23) is provided at one end of the delivery pipe (22) close to the relay pump (21), and the branch pipe (23) is inclined toward the direction of the relay pump (21). A pipe wall dredging member (26) is provided at the branch pipe (23), and the pipe wall dredging member (26) includes a steel chain (261). A dredging structure is provided at the end of the steel chain (261). The dredging structure includes a hoop (263), and the hoop (263) is coaxially arranged with the delivery pipe (22). Both sides of the hoop (263) are high-temperature welded with rubber rings (264). The rubber rings (264) is closely attached to the inner wall of the conveying pipe (22), and a plurality of ribs (265) are fixed to one side of the hoop (263), and the other end of the rib (265) is welded and fixed at the axis of the hoop (263), and a ring (266) is provided at the welded position. A hook (262) is provided at one end of the steel chain (261), and the hook (262) is hung on the ring (266). At the same time, a fin (267) is provided on the side of the hoop (263) away from the rib (265) to increase resistance; Two support plates (24) are installed on the carrier (1), a winding roller (25) is rotatably installed between the two support plates (24), and an end of the steel chain (261) away from the dredging structure is installed on the winding roller (25).

9. The underwater high-concentration sludge conveying system according to claim 7, characterized in that: A hanger (28) is also provided at the top of the bracket (8), a reel (29) is installed at the hanger (28), and a sling (30) for lifting the auger arm (2) is wound around the reel (29).

10. An underwater high-concentration sludge transportation method, using the underwater high-concentration sludge transportation system according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: The cutter rotates to crush the bottom silt, and the silt pump (6) pumps the high-concentration silt into the slurry mixing box (11) through the first-stage slurry pumping pipe (5) and the second-stage slurry pumping pipe (7); Step 2: draw water from a nearby source through a water pump pipe (14) into the mud mixing box (11), and mix the water and sludge; Step 3: Pump the mud-water mixture into the screen bucket (17) through the extraction pipe (16), and remove hard particles such as stones in the screen bucket (17); Step 4: The mud-water mixture after the particles are removed is transported to the tail of the water vehicle through the relay pump (21).

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