Dredging device and dredging method for dredging ship

Abstract

The invention discloses a desilting device and method for a desilting ship. The desilting device is connected with a ship body and comprises a desilting fixing support, a telescopic driving mechanism and a closed desilting mechanism. The closed desilting mechanism comprises a desilting pump assembly, a desilting pipeline, a closed desilting cover, a desilting nozzle assembly and a microbubble barrier assembly; the desilting method comprises the steps that the telescopic driving mechanism enables the closed desilting cover to extend downwards to a desilting area, the desilting spray head assembly is used for spraying water columns to stir and loosen silt and pushing the silt to the desilting pipeline, the loose silt is sucked into the desilting pipeline and discharged through negative pressure generated by the desilting pump assembly, and the microbubble barrier assembly sprays microbubbles. A bubble barrier is formed outside a desilting area, so that the diffusion of sludge is blocked, and the turbidity of a water body is effectively controlled; through combined application of the closed desilting cover and the microbubble barrier assembly, secondary diffusion of sludge is effectively prevented, so that pollution to surrounding water is reduced, and the micro-bubble desilting device is particularly suitable for desilting operation in environment sensitive areas.

Description

Technical Field

[0001] The present application relates to the technical field of river dredging, and in particular to a dredging device and a dredging method for a dredging ship. Background Art

[0002] After long-term use, a large amount of silt often accumulates at the bottom of a river, which not only affects the normal passage of ships on the river, but also hinders the normal functioning of the river's flood control, drainage and irrigation functions. Therefore, the silt at the bottom needs to be cleaned regularly; however, existing dredging equipment often causes secondary suspension of silt during the cleaning process, increasing the turbidity of the water body and even polluting downstream waters, affecting the cleanliness of the water quality, and thus having an adverse effect on the aquatic ecosystem, especially in water-sensitive areas, where it may cause ecological imbalance. Summary of the invention

[0003] In order to improve the defects of existing dredging equipment that often cause secondary suspension of silt during the cleaning process, increase water turbidity, and even cause pollution to downstream waters, the present application provides a dredging device and dredging method for a dredging ship.

[0004] The present application provides a dredging device and a dredging method for a dredging ship, which adopt the following technical solutions: A dredging device for a dredging ship, connected to a hull, comprising a dredging fixed bracket fixedly connected to the hull, a telescopic driving mechanism connected to the dredging fixed bracket and extending downward to the bottom of the hull, and a closed dredging mechanism connected to a moving end of the telescopic driving mechanism; The closed dredging mechanism includes a dredging pump assembly connected to the dredging fixed bracket, a dredging pipeline connected to the output end of the dredging pump assembly, a closed dredging cover connected to the output end of the telescopic drive mechanism and communicated with the dredging pipeline, a dredging nozzle assembly connected to the inner side wall of the closed dredging cover and arranged in an array along the circumference of the closed dredging cover, and a microbubble barrier assembly connected to the closed dredging cover and arranged along the circumference of the closed dredging cover; the closed dredging cover is used to cover the dredging area, and the microbubble barrier assembly is used to spray microbubbles around the dredging area to form a bubble barrier.

[0005] By adopting the above technical scheme, the telescopic drive mechanism extends the closed dredging hood down to the target dredging area, and the dredging nozzle assembly is used to spray water columns to loosen the silt and push the silt to the dredging pipe. The loose silt is sucked into the dredging pipe and discharged through the negative pressure generated by the dredging pump assembly. At the same time, the microbubble barrier assembly sprays microbubbles to form a bubble barrier outside the dredging area, thereby blocking the diffusion of silt to effectively control the turbidity of the water body. The present application effectively prevents the secondary diffusion of silt through the combined application of the closed dredging hood and the microbubble barrier assembly, thereby reducing pollution to the surrounding water body, and is particularly suitable for dredging operations in environmentally sensitive areas.

[0006] Preferably, the closed dredging hood includes a closed hood body, and a flexible sealing ring connected to the edge of the open end of the closed hood body, the closed hood body is provided with a silt suction port corresponding to the open end of the closed hood body, and the dredging pipeline is connected to the silt suction port.

[0007] By adopting the above technical scheme, the flexible sealing ring is connected to the edge of the open end of the closed cover body so as to fit tightly with the irregular river bottom and realize adaptive closure to the bottom terrain through flexible contact; the silt suction port is used to suck the silt in the closed cover body into the dredging pipe to form a closed sludge suction operation; the closed dredging cover of the present application is fitted to the bottom of the dredging area through the flexible sealing ring, and negative pressure is formed under the drive of the dredging pump assembly, and the loose silt is sucked into the dredging pipe through the silt suction port and discharged; the present application ensures the effective closure of the dredging area through the combination of the closed cover body and the flexible sealing ring, prevents silt diffusion and water pollution, and is particularly suitable for dredging operations with high environmental protection requirements in complex underwater environments.

[0008] Preferably, the diameter of the flexible sealing ring gradually increases in a direction away from the closure cover body.

[0009] By adopting the above technical solution, the diameter of the flexible sealing ring gradually increases in the direction away from the closed cover body, so that the flexible sealing ring can form a wider contact area when in contact with the bottom surface, effectively enhancing the sealing effect; due to the flexible characteristics of the flexible sealing ring, the flexible sealing ring can adapt to the irregular terrain of the bottom of the water, ensure that the opening end of the closed dredging cover is in close contact with the dredging area, and achieve comprehensive coverage of the dredging area; the present application not only improves the sealing effect and stability through the design of a gradually increasing flexible sealing ring, but also reduces the risk of silt diffusion, making dredging operations more environmentally friendly and efficient.

[0010] Preferably, the closed dredging mechanism further comprises a sludge crushing assembly inserted into the closed cover body and located below the sludge suction port.

[0011] By adopting the above technical scheme, during dredging operation, the sludge crushing component crushes the sludge below the sludge suction port and breaks large pieces of sludge into fine particles, so that the sludge can easily enter the dredging pipe through the sludge suction port and be discharged under the action of the dredging pump component, thereby avoiding adsorption blockage caused by excessively large sludge blocks; the configuration of the sludge crushing component can not only improve the dredging efficiency and ensure the continuous operation of the dredging system, but also improve the smoothness of sludge transportation and reduce blockage or operation stagnation caused during the dredging process. The present application realizes more efficient and reliable dredging operations through the efficient coordination of crushing, suction and discharge.

[0012] Preferably, the sludge crushing assembly includes a crushing base connected to the inner wall of the closure cover body, a crushing bracket connected to the crushing base, a crushing blade rotatably connected to the crushing bracket and located directly below the sludge suction port, and a crushing drive component connected to the crushing base and used to drive the crushing blade to rotate.

[0013] By adopting the above technical solution, when the dredging device starts to work, the crushing drive component drives the crushing blade to rotate, and the crushing blade crushes the sludge below the sludge suction port. The cut fine particles quickly enter the dredging pipe through the sludge suction port and are discharged with the dredging pump assembly, avoiding blockage and low dredging efficiency caused by large sludge blocks. The present application realizes continuous and smooth dredging operations, effectively improves the cleaning efficiency of the dredging system and reduces maintenance requirements.

[0014] Preferably, the dredging nozzle assembly includes a dredging lifting nozzle inclined downward and arranged along the opening direction of the closure cover body, a vortex push nozzle arranged above the dredging lifting nozzle and inclined horizontally along the rotation direction of the crushing blade, a dredging anti-blocking nozzle arranged above the vortex push nozzle and inclined upward, and a dredging booster pump connected to the hull; The silt removal and anti-clogging nozzle is used to be arranged along the direction facing the crushing blade; the silt removal booster pump is respectively connected with the silt removal lifting nozzle, the vortex propulsion nozzle, and the silt removal and anti-clogging nozzle; the silt removal lifting nozzle, the vortex propulsion nozzle, and the silt removal booster pump are all connected to the inner side wall of the closure cover body.

[0015] By adopting the above technical scheme, the dredging and lifting nozzle lifts the silt deposited at the bottom by spraying water; the water flow direction of the vortex-driven nozzle is consistent with the rotation direction of the crushing blade, and the vortex-driven nozzle is linked with the crushing blade, and the high-speed water flow of the vortex-driven nozzle and the rotating vortex generated by the rotation of the crushing blade are used to gradually gather the surrounding silt, so as to utilize the vortex to accelerate the raised silt to rotate and move toward the silt suction port, thereby increasing the efficiency of the silt through the crushing and absorption process; the dredging and anti-blocking nozzle sprays water to prevent larger particles from blocking the silt suction port or blocking the main crushing blade, thereby improving the overall flow smoothness; the dredging booster pump is connected to each nozzle to provide a high-pressure water flow to the nozzle assembly, ensuring that the water flow speed and pressure can effectively support the dredging function of the nozzle; this application enables the silt to smoothly enter the silt suction port and enter the dredging pipeline, thereby realizing efficient dredging operations, effectively improving the speed and overall patency of underwater dredging operations, improving dredging efficiency, and reducing secondary pollution to the water environment.

[0016] Preferably, the microbubble barrier assembly includes a microbubble barrier bracket connected to the outer side wall of the closed cover body, an outer bubble blowing component connected to the microbubble barrier bracket and sleeved on the circumference of the closed cover body, an inner bubble blowing component connected to the microbubble barrier bracket and inserted under the flexible sealing ring, and a microbubble generator arranged on the hull; the microbubble generator is respectively connected to the outer bubble blowing component and the inner bubble blowing component.

[0017] By adopting the above technical scheme, during dredging operations, when the closed dredging cover descends to the dredging area, the microbubble generator is started to generate a large number of microbubbles and release them through the outer bubble blowing component and the inner bubble blowing component; the outer bubble blowing component forms an external bubble barrier on the peripheral side of the closed cover body, and the inner bubble blowing component forms an internal bubble barrier under the flexible sealing ring. The outer bubble blowing component and the inner bubble blowing component work together to effectively prevent the secondary suspension and diffusion of sludge; the microbubble barrier bracket provides stable support for the outer bubble blowing component and the inner bubble blowing component to ensure the continuous formation of the bubble barrier; the present application not only improves the environmental protection performance of dredging operations, but also further enhances the control of sludge suspended particles through the setting of a double bubble barrier. The microbubble barrier assembly cooperates with the flexible sealing ring to reduce the problems of secondary suspension of sludge and water pollution, and improves the adaptability, efficiency and environmental protection performance of the dredging device.

[0018] Preferably, the outer bubble blowing component and the inner bubble blowing component both include an annular air outlet pipe, and air outlet nozzles connected to the annular air outlet pipe and arranged in an array along the circumference of the annular air outlet pipe.

[0019] By adopting the above technical scheme, multiple air outlet nozzles are respectively connected to the annular air outlet pipe and arranged in an array along the circumference of the annular air outlet pipe, ensuring the uniform release and efficient coverage of microbubbles; the microbubble generator is used to transport gas to the annular air outlet pipe, and the gas flows to the air outlet nozzles through the annular air outlet pipe, where microbubbles are formed and ejected, and the bubbles diffuse outward and form a barrier to prevent silt in the middle position from floating outward; the present application improves the ejection efficiency of microbubbles, ensures the integrity of the bubble barrier, and effectively prevents the diffusion of silt, thereby reducing the risk of pollution to the water body and improving the environmental protection and safety of dredging operations.

[0020] Preferably, the telescopic drive mechanism comprises a telescopic drive assembly fixedly connected to the dredging fixed bracket, a transverse swing rod hinged to the output end of the telescopic drive assembly, a longitudinal swing rod hinged to the transverse swing rod at one end and fixedly connected to the closed dredging cover at the other end, and a swing limit cover; The swing limit cover includes a first limit cover connected to the output end of the telescopic drive assembly, and a second limit cover connected to the lateral swing rod and located below the first limit cover. The first limit cover is sleeved at the hinge position between the output end of the telescopic drive assembly and the lateral swing rod, and the second limit cover is sleeved at the hinge position between the lateral swing rod and the longitudinal swing rod.

[0021] By adopting the above technical scheme, during the dredging operation, the telescopic drive assembly is started to drive the closed dredging cover to move down and close to the underwater dredging area. When the underwater dredging area is an inclined surface, under the pressure of the telescopic drive assembly, the longitudinal swing arm and the transverse swing arm are swung and flipped with their respective hinged positions as rotation axes, so that the bottom surface of the closed dredging cover is close to the inclined surface of the bottom of the water; the cooperation of the transverse swing arm and the longitudinal swing arm of the present application is used for the adjustable movement of the closed dredging cover, which is convenient for flexible adjustment of the coverage of the dredging area according to changes in the underwater environment, and adaptive adjustment and close contact according to the degree of inclination of the bottom of the water, thereby improving the adaptability and efficiency of the dredging operation, and ensuring stable operation through the swing limit cover to avoid excessive swinging and affecting the operation accuracy.

[0022] Preferably, a dredging method for a dredging ship, comprising the dredging device for a dredging ship, further comprises the following steps: S1: The telescopic driving mechanism drives the closed dredging mechanism to extend downward into the water and cover the dredging area to form a closed dredging space; S2: the microbubble barrier assembly is started and sprays microbubbles along the periphery of the closed dredging mechanism to form a microbubble barrier wall; S3: the desilting nozzle assembly is started and sprays a water column toward the desilting area directly below the closed desilting mechanism, so that the silt layer in the desilting area is lifted from the bottom; S4: The dredging pump assembly is started, and the sludge raised in the closed dredging mechanism is pumped out through the dredging pipeline.

[0023] By adopting the above technical scheme, the telescopic drive mechanism is used to drive the closed dredging mechanism to extend downward into the water and cover the dredging area to form a closed dredging space; the microbubble barrier assembly is used to spray microbubbles along the circumference of the closed dredging mechanism to form a microbubble barrier wall to suppress secondary suspension and ensure the stability of the dredging environment; the dredging nozzle assembly is used to spray a water column to the dredging area directly below the closed dredging mechanism to lift the silt layer in the dredging area from the bottom; the dredging pump assembly is used to extract the silt lifted in the closed dredging mechanism through the dredging pipeline to complete the dredging operation; the present application reduces the secondary suspension of silt and reduces the pollution to the water body through the combination of the closed dredging space and the microbubble barrier, and effectively protects the aquatic ecological environment, and is particularly suitable for areas with high environmental protection requirements.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. A dredging device for a dredging ship, wherein a telescopic driving mechanism extends a closed dredging cover downward to a target dredging area, a dredging nozzle assembly is used to spray water columns to loosen the sludge, and push the sludge to a dredging pipeline, and the loose sludge is sucked into the dredging pipeline and discharged through the negative pressure generated by the dredging pump assembly, and at the same time, a microbubble barrier assembly sprays microbubbles to form a bubble barrier outside the dredging area, thereby blocking the diffusion of sludge and effectively controlling the turbidity of the water body; the present application effectively prevents the secondary diffusion of sludge through the combined application of a closed dredging cover and a microbubble barrier assembly, thereby reducing the pollution to the surrounding water body, and is particularly suitable for dredging operations in environmentally sensitive areas; 2. A dredging device for a dredging ship. During the dredging operation, when the closed dredging cover descends to the dredging area, a microbubble generator generates a large number of microbubbles and releases them through an outer bubble blowing component and an inner bubble blowing component; the outer bubble blowing component forms an external bubble barrier on the peripheral side of the closed cover body, and the inner bubble blowing component forms an internal bubble barrier under the flexible sealing ring. The outer bubble blowing component and the inner bubble blowing component work together to effectively prevent the secondary suspension and diffusion of sludge; the microbubble barrier bracket provides a stable support for the outer bubble blowing component and the inner bubble blowing component to ensure the continuous formation of the bubble barrier; the present application not only improves the environmental protection performance of the dredging operation, but also further enhances the control of sludge suspended particles through the setting of a double bubble barrier. The microbubble barrier assembly cooperates with the flexible sealing ring to reduce the problems of sludge secondary suspension and water pollution, thereby improving the adaptability, efficiency and environmental protection performance of the dredging device; 3. A dredging method for a dredging vessel, wherein a telescopic driving mechanism is used to drive a closed dredging mechanism to extend downward into the water and cover the dredging area to form a closed dredging space; a microbubble barrier assembly is used to spray microbubbles along the circumference of the closed dredging mechanism to form a microbubble barrier wall to suppress secondary suspension and ensure the stability of the dredging environment; a dredging nozzle assembly is used to spray a water column to the dredging area directly below the closed dredging mechanism to lift the silt layer in the dredging area from the bottom; a dredging pump assembly is used to extract the silt lifted in the closed dredging mechanism through a dredging pipeline to complete the dredging operation; the present application reduces the secondary suspension of silt through the combination of a closed dredging space and a microbubble barrier, reduces pollution to the water body, improves dredging efficiency, and effectively protects the aquatic ecological environment, and is particularly suitable for areas with high environmental protection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic cross-sectional structural diagram of an embodiment of a dredging device for a dredging vessel of the present application.

[0026] Figure 2 for Figure 1 Enlarged view of part A.

[0027] Figure 3 It is a schematic flow chart of the steps of an embodiment of a dredging method for a dredging vessel of the present application.

[0028] Description of reference numerals: 1. Hull; 2. Dredging fixed bracket; 3. Telescopic drive mechanism; 31. Telescopic drive assembly; 32. Transverse swing rod; 33. Longitudinal swing rod; 34. Swing limit cover; 341. First limit cover; 342. Second limit cover; 4. Closed dredging mechanism; 41. Dredging pump assembly; 42. Dredging pipeline; 43. Closed dredging cover; 44. Dredging nozzle assembly; 45. Microbubble barrier assembly; 46. Sludge crushing assembly; 431. Closed cover body; 432. Flexible sealing ring; 433. Sludge suction port; 441. Dredging lifting nozzle; 442. Eddy current push nozzle; 443. Dredging anti-blocking nozzle; 444. Dredging booster pump; 451. Microbubble barrier bracket; 452. External bubble blowing component; 453. Internal bubble blowing component; 454. Microbubble generator; 461. Crushing base; 462. Crushing bracket; 463. Crushing blade; 464. Crushing drive component; 4521. Annular air outlet pipe; 4522. Air outlet nozzle; 4631. First transmission gear; 4641. Second transmission gear; 4642. Transmission belt. DETAILED DESCRIPTION

[0029] The following is combined with Figures 1 to 3 This application is described in further detail.

[0030] The present application discloses a dredging device and a dredging method for a dredging vessel. Figure 1 , a dredging device for a dredging ship, connected to a hull 1, comprising a dredging fixed bracket 2 fixedly connected to the hull 1, a telescopic driving mechanism 3 connected to the dredging fixed bracket 2 and extending downward to the bottom of the hull 1, and a closed dredging mechanism 4 connected to a moving end of the telescopic driving mechanism 3; The closed dredging mechanism 4 includes a dredging pump assembly 41 connected to the dredging fixed bracket 2, a dredging pipeline 42 connected to the output end of the dredging pump assembly 41, a closed dredging cover 43 connected to the output end of the telescopic driving mechanism 3 and communicated with the dredging pipeline 42, a dredging nozzle assembly 44 connected to the inner wall of the closed dredging cover 43 and arranged in an array along the circumference of the closed dredging cover 43, and a microbubble barrier assembly 45 connected to the closed dredging cover 43 and arranged along the circumference of the closed dredging cover 43; the closed dredging cover 43 is used to cover the dredging area, and the microbubble barrier assembly 45 is used to spray microbubbles around the dredging area to form a bubble barrier.

[0031] The present application extends the closed dredging cover 43 downward to the target dredging area through the telescopic driving mechanism 3, and the dredging nozzle assembly 44 is used to spray water columns to loosen the silt and push the silt to the dredging pipe 42, and the loose silt is sucked into the dredging pipe 42 and discharged through the negative pressure generated by the dredging pump assembly 41, and at the same time, the microbubble barrier assembly 45 sprays microbubbles to form a bubble barrier outside the dredging area, thereby blocking the diffusion of silt to effectively control the turbidity of the water body; the present application effectively prevents the secondary diffusion of silt through the combined application of the closed dredging cover 43 and the microbubble barrier assembly 45, thereby reducing the pollution to the surrounding water body, and is particularly suitable for dredging operations in environmentally sensitive areas; The dredging pump assembly 41 of the present application is preferably a mud pump.

[0032] Furthermore, if Figure 2 As shown, the closed dredging hood 43 includes a closed hood body 431 and a flexible sealing ring 432 connected to the edge of the open end of the closed hood body 431. The closed hood body 431 is provided with a silt suction port 433 corresponding to the open end of the closed hood body 431, and the silt removal pipeline 42 is connected to the silt suction port 433.

[0033] The flexible sealing ring 432 of the present application is connected to the edge of the open end of the closed cover body 431 so as to fit tightly with the irregular bottom of the river channel and realize adaptive closure to the bottom terrain through flexible contact; the dredging pipeline 42 is connected to the silt suction port 433, and the silt suction port 433 is used to suck the silt in the closed cover body 431 into the dredging pipeline 42 to form a closed sludge suction operation; the closed dredging cover 43 of the present application is attached to the bottom of the dredging area through the flexible sealing ring 432, and negative pressure is formed under the drive of the dredging pump assembly 41, and the loose silt is sucked into the dredging pipeline 42 through the silt suction port 433 and discharged; the present application ensures the effective closure of the dredging area through the combination of the closed cover body 431 and the flexible sealing ring 432, prevents the diffusion of silt and water pollution, and is particularly suitable for dredging operations with high environmental protection requirements in complex underwater environments; The flexible sealing ring 432 is preferably made of neoprene material.

[0034] Furthermore, if Figure 2 As shown, the diameter of the flexible sealing ring 432 gradually increases in a direction away from the closure cover body 431 .

[0035] The diameter of the flexible sealing ring 432 of the present application gradually increases in the direction away from the closed cover body 431, so that the flexible sealing ring 432 can form a wider contact area when in contact with the bottom surface, effectively enhancing the sealing effect; due to the flexible characteristics of the flexible sealing ring 432, the flexible sealing ring 432 can adapt to the irregular terrain of the bottom of the water, ensure that the opening end of the closed dredging cover 43 is in close contact with the dredging area, and achieve full coverage of the dredging area; the present application uses the design of a gradually enlarged flexible sealing ring 432, which not only improves the sealing effect and stability, but also reduces the risk of silt diffusion, making dredging operations more environmentally friendly and efficient.

[0036] Specifically, Figure 2 As shown, the closed silt removal mechanism 4 also includes a sludge crushing component 46 inserted into the closed cover body 431 and located below the silt suction port 433.

[0037] During the dredging operation, the sludge crushing component 46 of the present application crushes the sludge below the sludge suction port 433, and breaks the large sludge into fine particles, so that the sludge can easily enter the dredging pipe 42 through the sludge suction port 433 and be discharged under the action of the dredging pump component 41, thereby avoiding adsorption blockage caused by excessively large sludge blocks; the configuration of the sludge crushing component 46 can not only improve the dredging efficiency and ensure the continuous operation of the dredging system, but also improve the smoothness of sludge transportation and reduce blockage or operation stagnation caused during the dredging process. The present application achieves a more efficient and reliable dredging operation through the efficient coordination of crushing, suction and discharge.

[0038] More specifically, if Figure 2 As shown, the sludge crushing assembly 46 includes a crushing base 461 connected to the inner wall of the closed cover body 431, a crushing bracket 462 connected to the crushing base 461, a crushing blade 463 rotatably connected to the crushing bracket 462 and located directly below the sludge suction port 433, and a crushing drive component 464 connected to the crushing base 461 and used to drive the crushing blade 463 to rotate.

[0039] When the dredging device of the present application starts to work, the crushing driving component 464 drives the crushing blade 463 to rotate, and the crushing blade 463 crushes the sludge below the sludge suction port 433, and the cut fine particles quickly enter the dredging pipe 42 through the sludge suction port 433 and are discharged with the dredging pump assembly 41, thereby avoiding blockage and low dredging efficiency caused by large sludge blocks; the present application realizes continuous and smooth dredging operations, effectively improves the cleaning efficiency of the dredging system and reduces maintenance requirements; The crushing drive component 464 of the present application is preferably a motor, such as Figure 2As shown, the present application also discloses that a first transmission gear 4631 is sleeved on the rotating shaft of the crushing blade 463, a second transmission gear 4641 is sleeved on the output end of the crushing drive component 464, and a transmission belt 4642 is further sleeved on the outer side walls of the first transmission gear 4631 and the second transmission gear 4641; the crushing drive component 464 is used to drive the second transmission gear 4641 to rotate, the second transmission gear 4641 drives the first transmission gear 4631 to rotate through the transmission belt 4642, and the first transmission gear 4631 drives the crushing blade 463 to rotate to crush large pieces of sludge or debris.

[0040] In addition, if Figure 1 and Figure 2 As shown, the dredging nozzle assembly 44 includes a dredging lifting nozzle 441 which is inclined downward and arranged along the opening direction of the closure cover body 431, a vortex push nozzle 442 which is arranged above the dredging lifting nozzle 441 and is horizontally inclined along the rotation direction of the crushing blade 463, a dredging anti-blocking nozzle 443 which is arranged above the vortex push nozzle 442 and is inclined upward, and a dredging booster pump 444 connected to the hull 1; The dredging and anti-clogging nozzle 443 is used to be arranged along the direction facing the crushing blade 463; the dredging booster pump 444 is respectively connected to the dredging lifting nozzle 441, the vortex propulsion nozzle 442, and the dredging and anti-clogging nozzle 443; the dredging lifting nozzle 441, the vortex propulsion nozzle 442, and the dredging booster pump 444 are all connected to the inner wall of the closed cover body 431.

[0041] The silt removal and lifting nozzle 441 of the present application lifts up the silt deposited at the bottom by spraying water for further treatment; the water flow direction of the vortex-driven nozzle 442 is consistent with the rotation direction of the crushing blade 463, and the vortex-driven nozzle 442 is linked with the crushing blade 463, and the high-speed water flow of the vortex-driven nozzle 442 and the rotating vortex generated by the rotation of the crushing blade 463 are used to gradually gather the surrounding silt, so as to use the vortex to accelerate the raised silt to rotate and move toward the silt suction port 433, thereby increasing the efficiency of the silt through the crushing and suction process; The anti-silt nozzle 443 sprays water to prevent larger particles from blocking the silt suction port 433 or getting stuck in the main crushing blade 463, thereby improving the overall flow smoothness; the dredging booster pump 444 is connected to each nozzle to provide high-pressure water flow to the nozzle assembly, ensuring that the water flow speed and pressure can effectively support the dredging function of the nozzle; this application allows the silt to smoothly enter the silt suction port 433 and enter the dredging pipeline 42, achieving efficient dredging operations, effectively improving the speed and overall patency of underwater dredging operations, improving dredging efficiency, and reducing secondary pollution to the water environment.

[0042] And, if Figure 1 and Figure 2As shown, the microbubble barrier assembly 45 includes a microbubble barrier bracket 451 connected to the outer side wall of the closed cover body 431, an outer bubble blowing component 452 connected to the microbubble barrier bracket 451 and sleeved on the peripheral side of the closed cover body 431, an inner bubble blowing component 453 connected to the microbubble barrier bracket 451 and inserted under the flexible sealing ring 432, and a microbubble generator 454 arranged on the hull 1; the microbubble generator 454 is respectively connected to the outer bubble blowing component 452 and the inner bubble blowing component 453.

[0043] In the present application, during the dredging operation, when the closed dredging cover 43 descends to the dredging area, the microbubble generator 454 is started to generate a large number of microbubbles and release them through the outer bubble blowing component 452 and the inner bubble blowing component 453; the outer bubble blowing component 452 forms an external bubble barrier around the closed cover body 431, and the inner bubble blowing component 453 forms an internal bubble barrier under the flexible sealing ring 432. The outer bubble blowing component 452 and the inner bubble blowing component 453 work together to effectively prevent the secondary suspension and diffusion of sludge; the microbubble barrier bracket 451 provides stable support for the outer bubble blowing component 452 and the inner bubble blowing component 453 to ensure the continuous formation of the bubble barrier; The present application not only improves the environmental performance of the dredging operation, but also further enhances the control of sludge suspended particles by setting up a double bubble barrier. The microbubble barrier assembly 45 cooperates with the flexible sealing ring 432 to reduce the secondary suspension of sludge and water pollution problems, thereby improving the adaptability, efficiency and environmental performance of the dredging device. The microbubble generator 454 is connected to the outer bubble blowing component 452 and the inner bubble blowing component 453 through pipes.

[0044] Furthermore, if Figure 2 As shown, the outer bubble blowing component 452 and the inner bubble blowing component 453 both include an annular air outlet pipe 4521 and air outlet nozzles 4522 that are connected to the annular air outlet pipe 4521 and are arranged in an array along the circumference of the annular air outlet pipe 4521 .

[0045] In the present application, a plurality of air outlet nozzles 4522 are respectively connected to the annular air outlet pipe 4521 and arranged in an array along the circumference of the annular air outlet pipe 4521, thereby ensuring uniform release and efficient coverage of microbubbles; the microbubble generator 454 is used to transport gas to the annular air outlet pipe 4521, and the gas flows to the air outlet nozzle 4522 through the annular air outlet pipe 4521, and microbubbles are formed and ejected at the air outlet nozzle 4522, and the bubbles diffuse outward and form a barrier to prevent the silt in the middle position from floating outward; the present application improves the ejection efficiency of microbubbles, ensures the integrity of the bubble barrier, and effectively prevents the diffusion of silt, thereby reducing the risk of pollution to the water body and improving the environmental protection and safety of dredging operations; The annular air outlet pipe 4521 of the present application is connected to the micro bubble generator 454 through a pipe.

[0046] Furthermore, if Figure 2 As shown, the telescopic drive mechanism 3 includes a telescopic drive assembly 31 fixedly connected to the dredging fixed bracket 2, a lateral swing rod 32 hinged to the output end of the telescopic drive assembly 31, a longitudinal swing rod 33 hinged to the lateral swing rod 32 at one end and fixedly connected to the closed dredging cover 43 at the other end, and a swing limit cover 34; The swing limit cover 34 includes a first limit cover 341 connected to the output end of the telescopic drive assembly 31, and a second limit cover 342 connected to the lateral swing rod 32 and located below the first limit cover 341. The first limit cover 341 is sleeved at the hinge position between the output end of the telescopic drive assembly 31 and the lateral swing rod 32, and the second limit cover 342 is sleeved at the hinge position of the lateral swing rod 32 and the longitudinal swing rod 33.

[0047] The lateral swing rod 32 of the present application is connected to the output end of the telescopic drive assembly 31 by a hinge, and can swing laterally. The longitudinal swing rod 33 is connected to the lateral swing rod 32 by a hinge, so that the longitudinal swing rod 33 drives the closed dredging cover 43 to achieve longitudinal swing; the inner side wall of the first limit cover 341 is used to press the lateral swing rod 32 to limit the swing range of the lateral swing rod 32, and the inner side wall of the second limit cover 342 is used to press the longitudinal swing rod 33 to limit the swing range of the longitudinal swing rod 33; During the dredging operation, the telescopic driving assembly 31 is started to drive the closed dredging cover 43 to move downward and close to the underwater dredging area. When the underwater dredging area is an inclined surface, under the pressure of the telescopic driving assembly 31, the longitudinal swing rod 33 and the transverse swing rod 32 are respectively swung and turned with their respective hinge positions as rotation axes, so that the bottom surface of the closed dredging cover 43 is close to the inclined surface of the bottom of the water; The cooperation of the lateral swinging rod 32 and the longitudinal swinging rod 33 of the present application is used to close the adjustable movement of the dredging cover 43, so as to flexibly adjust the coverage of the dredging area according to the changes in the underwater environment, and to adaptively adjust the tightness according to the inclination of the underwater bottom, thereby improving the adaptability and efficiency of the dredging operation, and ensuring stable operation by swinging the limit cover 34 to avoid excessive swinging and affecting the operation accuracy; The telescopic drive assembly 31 is preferably a telescopic cylinder.

[0048] Specifically, Figure 3 As shown, a dredging method for a dredging vessel includes a dredging device for a dredging vessel, and further includes the following steps: S1: The telescopic driving mechanism 3 drives the closed dredging mechanism 4 to extend downward into the water and cover the dredging area to form a closed dredging space; S2: The microbubble barrier assembly 45 is started and sprays microbubbles along the four sides of the closed dredging mechanism to form a microbubble barrier wall; S3: The dredging nozzle assembly 44 is started and sprays a water column toward the dredging area directly below the closed dredging mechanism 4, so that the silt layer in the dredging area is lifted from the bottom; S4: The silt removal pump assembly 41 is started, and the silt raised in the closed silt removal mechanism 4 is pumped out through the silt removal pipeline 42 .

[0049] The telescopic driving mechanism 3 of the present application is used to drive the closed dredging mechanism 4 to extend downward into the water and cover the dredging area to form a closed dredging space; the microbubble barrier assembly 45 is used to spray microbubbles along the circumference of the closed dredging mechanism 4 to form a microbubble barrier wall to suppress secondary suspension and ensure the stability of the dredging environment; the dredging nozzle assembly 44 is used to spray a water column to the dredging area directly below the closed dredging mechanism 4 to lift the silt layer in the dredging area from the bottom; the dredging pump assembly 41 is used to extract the silt lifted in the closed dredging mechanism 4 through the dredging pipe 42 to complete the dredging operation; the present application reduces the secondary suspension of silt and reduces the pollution to the water body through the combination of the closed dredging space and the microbubble barrier, and improves the dredging efficiency and effectively protects the aquatic ecological environment. It is particularly suitable for areas with high environmental protection requirements.

[0050] The implementation principle of a dredging device and a dredging method for a dredging ship in the embodiment of the present application is as follows: A dredging device for a dredging ship, wherein a closed dredging cover 43 is extended downward to a target dredging area through a telescopic driving mechanism 3, a dredging nozzle assembly 44 is used to spray a water column to loosen the sludge, and push the sludge to a dredging pipe 42, and the loose sludge is sucked into the dredging pipe 42 and discharged through the negative pressure generated by the dredging pump assembly 41, and at the same time, a microbubble barrier assembly 45 is started to spray microbubbles to form a bubble barrier outside the dredging area, thereby blocking the diffusion of sludge, so as to effectively control the turbidity of the water body; the present application effectively prevents the secondary diffusion of sludge through the combined application of the closed dredging cover 43 and the microbubble barrier assembly 45, thereby reducing the pollution to the surrounding water body, and is particularly suitable for dredging operations in environmentally sensitive areas; During the dredging operation, when the closed dredging cover 43 descends to the dredging area, the microbubble generator 454 is started to generate a large number of microbubbles and release them through the outer bubble blowing component 452 and the inner bubble blowing component 453; the outer bubble blowing component 452 forms an external bubble barrier on the side of the closed cover body 431, and the inner bubble blowing component 453 forms an internal bubble barrier under the flexible sealing ring 432. The outer bubble blowing component 452 and the inner bubble blowing component 453 work together to effectively prevent the secondary suspension and diffusion of sludge; the microbubble barrier bracket 451 provides stable support for the outer bubble blowing component 452 and the inner bubble blowing component 453 to ensure the continuous formation of the bubble barrier; the present application not only improves the environmental protection performance of the dredging operation, but also further enhances the control of sludge suspended particles through the setting of the double bubble barrier. The microbubble barrier assembly 45 cooperates with the flexible sealing ring 432 to reduce the secondary suspension of sludge and water pollution problems, and improves the adaptability, efficiency and environmental protection performance of the dredging device; A dredging method for a dredging vessel, wherein a telescopic driving mechanism 3 is used to drive a closed dredging mechanism 4 to extend downward into the water and cover a dredging area to form a closed dredging space; a microbubble barrier assembly 45 is used to spray microbubbles along the circumference of the closed dredging mechanism 4 to form a microbubble barrier wall to suppress secondary suspension and ensure the stability of the dredging environment; a dredging nozzle assembly 44 is used to spray a water column to the dredging area directly below the closed dredging mechanism 4 to lift the silt layer in the dredging area from the bottom; a dredging pump assembly 41 is used to extract the silt lifted in the closed dredging mechanism 4 through a dredging pipe 42 to complete the dredging operation; the present application reduces the secondary suspension of silt and reduces the pollution to the water body through the combination of a closed dredging space and a microbubble barrier, thereby improving the dredging efficiency and effectively protecting the aquatic ecological environment, and is particularly suitable for areas with high environmental protection requirements.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A dredging device for a dredging vessel, connected to a hull (1), characterized in that: It comprises a dredging fixed support (2) fixedly connected to the hull (1), a telescopic driving mechanism (3) connected to the dredging fixed support (2) and extending downward to the bottom of the hull (1), and a closed dredging mechanism (4) connected to the movable end of the telescopic driving mechanism (3); The closed dredging mechanism (4) comprises a dredging pump assembly (41) connected to the dredging fixed bracket (2), a dredging pipeline (42) connected to the output end of the dredging pump assembly (41), a closed dredging cover (43) connected to the output end of the telescopic drive mechanism (3) and in communication with the dredging pipeline (42), a dredging nozzle assembly (44) connected to the inner side wall of the closed dredging cover (43) and arranged in an array along the circumference of the closed dredging cover (43), and a microbubble barrier assembly (45) connected to the closed dredging cover (43) and arranged along the circumference of the closed dredging cover (43); the closed dredging cover (43) is used to cover the dredging area, and the microbubble barrier assembly (45) is used to spray microbubbles around the dredging area to form a bubble barrier.

2. A dredging device for a dredging vessel according to claim 1, characterized in that: The closed silt removal cover (43) comprises a closed cover body (431) and a flexible sealing ring (432) connected to the edge of the open end of the closed cover body (431); the closed cover body (431) is provided with a silt suction port (433) corresponding to the open end of the closed cover body (431); and the silt removal pipeline (42) is connected to the silt suction port (433).

3. A dredging device for a dredging vessel according to claim 2, characterized in that: The diameter of the flexible sealing ring (432) gradually increases in a direction away from the sealing cover body (431).

4. A dredging device for a dredging vessel according to claim 2, characterized in that: The closed silt removal mechanism (4) further comprises a sludge chopping assembly (46) inserted into the closed cover body (431) and located below the silt suction port (433).

5. A dredging device for a dredging vessel according to claim 4, characterized in that: The sludge crushing assembly (46) includes a crushing base (461) connected to the inner wall of the closed cover body (431), a crushing bracket (462) connected to the crushing base (461), a crushing blade (463) rotatably connected to the crushing bracket (462) and located directly below the sludge suction port (433), and a crushing drive component (464) connected to the crushing base (461) and used to drive the crushing blade (463) to rotate.

6. A dredging device for a dredging vessel according to claim 5, characterized in that: The dredging nozzle assembly (44) comprises a dredging lifting nozzle (441) which is inclined downward and arranged along the opening direction of the closure cover body (431), a vortex driving nozzle (442) which is arranged above the dredging lifting nozzle (441) and is horizontally inclined along the rotation direction of the crushing blade (463), and a dredging anti-blocking nozzle (443) which is arranged above the vortex driving nozzle (442) and is inclined upward, and a dredging booster pump (444) connected to the hull (1); The silt removal and anti-clogging nozzle (443) is used to be arranged along the direction facing the crushing blade (463); the silt removal booster pump (444) is respectively connected to the silt removal and lifting nozzle (441), the vortex propulsion nozzle (442), and the silt removal and anti-clogging nozzle (443); the silt removal and lifting nozzle (441), the vortex propulsion nozzle (442), and the silt removal and anti-clogging nozzle (443) are all connected to the inner wall of the closed cover body (431).

7. A dredging device for a dredging vessel according to claim 2, characterized in that: The microbubble barrier assembly (45) includes a microbubble barrier bracket (451) connected to the outer side wall of the closed cover body (431), an outer bubble blowing component (452) connected to the microbubble barrier bracket (451) and sleeved on the circumference of the closed cover body (431), an inner bubble blowing component (453) connected to the microbubble barrier bracket (451) and inserted under the flexible sealing ring (432), and a microbubble generator (454) arranged on the hull (1); the microbubble generator (454) is respectively connected to the outer bubble blowing component (452) and the inner bubble blowing component (453).

8. A dredging device for a dredging vessel according to claim 7, characterized in that: The outer bubble blowing component (452) and the inner bubble blowing component (453) both include an annular air outlet pipe (4521), and air outlet nozzles (4522) connected to the annular air outlet pipe (4521) and arranged in an array along the circumference of the annular air outlet pipe (4521).

9. The dredging device for a dredging vessel according to claim 1, characterized in that: The telescopic drive mechanism (3) comprises a telescopic drive assembly (31) fixedly connected to the dredging fixed bracket (2), a transverse swing rod (32) hinged to the output end of the telescopic drive assembly (31), a longitudinal swing rod (33) hinged to the transverse swing rod (32) at one end and fixedly connected to the closed dredging cover (43) at the other end, and a swing limit cover (34); The swing limit cover (34) comprises a first limit cover (341) connected to the output end of the telescopic drive assembly (31), and a second limit cover (342) connected to the transverse swing rod (32) and located below the first limit cover (341), wherein the first limit cover (341) is sleeved at a hinged position between the output end of the telescopic drive assembly (31) and the transverse swing rod (32), and the second limit cover (342) is sleeved at a hinged position between the transverse swing rod (32) and the longitudinal swing rod (33).

10. A dredging method for a dredging vessel, characterized in that: The dredging device for a dredging vessel according to any one of claims 1 to 9 further comprises the following steps: S1: the telescopic driving mechanism (3) drives the closed dredging mechanism (4) to extend downward into the water and cover the dredging area to form a closed dredging space; S2: the microbubble barrier component (45) is started and sprays microbubbles along the periphery of the closed dredging mechanism (4) to form a microbubble barrier wall; S3: the desilting nozzle assembly (44) is started and sprays a water column toward the desilting area directly below the closed desilting mechanism (4), so that the silt layer in the desilting area is lifted from the bottom; S4: The desilting pump assembly (41) is started, and the silt raised in the closed desilting mechanism (4) is pumped out through the desilting pipeline (42).

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