Mud delivery pipeline of cutter suction dredging vessel and installation method thereof

Abstract

The invention discloses a mud delivery pipeline for a cutter suction dredging vessel and an installation method thereof. The mud delivery pipeline comprises a mud delivery pipeline body (1), a flange (2), a buoy (3), a connecting assembly and an anti-blocking cutting assembly; one end of two adjacent mud delivery pipeline bodies (1) is respectively fixedly installed on one end of a pair of flanges (2); the anti-blocking cutting assembly is arranged in one of the flanges (2); the other ends of the pair of flanges (2) are butted together through the connecting assembly; the other ends of the pair of flanges (2) are fixedly connected by a plurality of threaded rods (11); the plurality of threaded rods (11) are arranged at intervals along the circumference of the flanges (2), so that the two adjacent mud delivery pipeline bodies (1) are connected through the flanges (2); the buoy (3) is a hollow structure and is sleeved on the outside of the pair of flanges (2) and the outside of one end of the two adjacent mud delivery pipeline bodies (1). The invention can prevent the mud delivery pipeline from water seepage, sinking to the bottom, and blocking and bursting.

Description

Technical Field

[0001] The invention relates to a cutter suction vessel accessory and an installation method thereof, in particular to a cutter suction dredging vessel mud delivery pipeline and an installation method thereof. Background Art

[0002] Cutter suction dredging vessels are widely used as dredging tools in dredging projects due to their high efficiency and low overall cost. Existing cutter suction dredging vessels typically use multiple pipes connected by flanges, floating on the water surface to transport sludge.

[0003] Since cutter suction dredging vessels need to work in the water for a long time, the mud pipe and its flange also float in the water for a long time. The flanges are only connected and fixed by bolts. The bolts are easily corroded by river water, causing the connection to loosen or even break, which causes water to flow into the pipe. After the pipe is filled with river water, it sinks to the bottom of the river under its own weight, affecting the normal use of the mud pipe. At the same time, during the process of dredging, the cutter suction dredging vessel will simultaneously suck in the debris in the silt and transport it into the mud pipe. Various debris will have an adverse effect on the patency of the mud pipe. After the debris accumulates, it blocks the mud pipe, and the silt cannot be effectively discharged from the mud pipe. The pipe is prone to bursting during the continuous dredging process.

[0004] Therefore, it is necessary to provide a cutter suction dredging vessel mud conveying pipeline that is not easy to sink to the bottom and clog and an installation method thereof. Summary of the Invention

[0005] One of the purposes of the present invention is to provide a dredging pipeline of a cutter suction dredging vessel, which can prevent the dredging pipeline from water seepage, sinking to the bottom, and being blocked or bursting.

[0006] The second object of the present invention is to provide a method for installing a dredging pipeline of a cutter suction dredging vessel, which is convenient and quick to assemble and disassemble, and has good structural reliability and sealing at the connection nodes.

[0007] The present invention is achieved in that:

[0008] A cutter suction dredging vessel mud pipeline comprises a mud pipeline body, a flange, a buoy, a connecting assembly and an anti-blocking cutting assembly; one end of two adjacent mud pipeline bodies are respectively fixedly mounted on one end of a pair of flanges, the anti-blocking cutting assembly is arranged in one of the flanges, and the other ends of the pair of flanges are butted together through the connecting assembly; the other ends of the pair of flanges are fixedly connected by a plurality of threaded rods, and the plurality of threaded rods are arranged at intervals along the circumference of the flanges, so that the two adjacent mud pipeline bodies are connected through the flanges; the buoy is a hollow structure and is sleeved on the outside of the pair of flanges and the outside of one end of the two adjacent mud pipeline bodies.

[0009] A sealing ring is embedded between the pair of flanges. The inner ring of the sealing ring is fixedly connected between the other ends of the pair of flanges through a plurality of threaded rods. The inner wall of the buoy is pressed tightly against the outer ring of the sealing ring.

[0010] The connecting assembly includes a claw ring, a positioning ring and a snap ring; one end of the claw ring is coaxially embedded in one of the flanges, and the anti-blocking cutting assembly is embedded in one end of the claw ring; the positioning ring is coaxially embedded in the other flange, and a plurality of circles of limiting tooth grooves are formed on the inner wall of the positioning ring; the snap ring is circumferentially arranged at the other end of the claw ring, and the other end of the claw ring is inserted into the other flange, so that the snap ring can be matched and embedded in one of the circles of limiting tooth grooves, thereby allowing a pair of flanges to be docked through the connecting assembly.

[0011] The connection assembly further comprises strong magnetic attracting stones, and a plurality of strong magnetic attracting stones are respectively arranged in a circumferential direction on the inner walls of the other ends of a pair of flanges, so that the other ends of the pair of flanges are adsorbed and docked.

[0012] The anti-blocking cutting assembly includes a rotating shaft, a fixed ring, a spiral blade, a cutting knife and a baffle; the fixed ring is installed in the claw ring, and the spiral blade, the cutting knife and the baffle are all installed in the fixed ring through the rotating shaft and can rotate synchronously with the rotating shaft; a plurality of spiral blades are circumferentially arranged in the middle of the rotating shaft, a plurality of cutting knives are circumferentially arranged at one end of the rotating shaft, and a plurality of baffles are circumferentially arranged at the other end of the rotating shaft; the baffle, spiral blade and cutting knife are arranged in sequence from upstream to downstream along the direction of sludge flow.

[0013] The two end portions of the rotating shaft are respectively formed with guide cones, the guide cones are in a conical structure, and the tip of the cone extends to the side of the end portion of the rotating shaft.

[0014] A method for installing a dredging pipeline of a cutter suction dredging vessel comprises the following steps:

[0015] Step 1: Select the sludge pipe body and flange according to the sludge conveying distance and clean them before assembly;

[0016] Step 2: Assemble the anti-blocking cutting assembly;

[0017] Step 3: Coaxially connect and fix one end of the two adjacent mud conveying pipe bodies to one end of a pair of flanges respectively, and coaxially embed the anti-blocking cutting assembly into one of the flanges; the other ends of the pair of flanges are connected through the connecting assembly and sealed and locked through the threaded rod with a sealing ring;

[0018] Step 4: Coaxially sleeve the buoy onto a pair of flanges and one end of the adjacent two mud pipe bodies, so that the inner wall of the buoy is pressed tightly against the sealing ring and locked with bolts to seal;

[0019] Step 5: Repeat steps 2 to 4, connect the mud pipe body through flanges in turn to form the mud pipe of the cutter suction dredging vessel, connect one end of the mud pipe to the dredging pump body of the cutter suction dredging vessel, and connect the other end of the mud pipe to the river bank pipe or submersible pipe.

[0020] In step 2, the anti-blocking cutting assembly includes a rotating shaft, a fixed ring, spiral blades, a cutting knife and a baffle; a plurality of spiral blades are respectively installed in a circumferential direction on the middle part of the rotating shaft, a plurality of baffles are respectively installed in a circumferential direction on one end of the rotating shaft, a plurality of cutting knives are respectively installed in a circumferential direction on the other end of the rotating shaft, and the rotating shaft is rotatably installed in the fixed ring to form an anti-blocking cutting assembly.

[0021] In step 3, the connection assembly includes a claw ring, a positioning ring, and a clamping ring; one end of the claw ring is coaxially embedded in one of the flanges, and the positioning ring is coaxially embedded in the other flange. The other end of the claw ring is inserted into the positioning ring and the clamping ring is matched and embedded in one of the circle of limiting tooth grooves, so that the other ends of the pair of flanges are connected;

[0022] After the pair of flanges are docked, check the connection status of the clamping ring and the limit gear ring. If the clamping ring and the limit gear ring are not fully engaged, reinstall or adjust the connection assembly. If the clamping ring and the limit gear ring are fully engaged, proceed to step 4.

[0023] In step 4, after the buoy is installed, the two mud pipe bodies are tested for water flow. If the connection between the two mud pipe bodies does not leak, step 5 is performed. If the connection between the two mud pipe bodies does leak, the buoy is reinstalled.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention is provided with a connecting assembly, which can form a reliable connection between a pair of flanges through the clamping limit of the claw ring through the limiting tooth groove and the clamping ring, thereby facilitating a reliable connection between the pair of flanges. Even if the threaded rod is loosened or broken, the two adjacent mud conveying pipe bodies are not easily loosened, so that the mud conveying pipes can be immersed in river water for a long time and have a long service life.

[0026] 2. The present invention is provided with a sealing ring and a float. The sealing ring can ensure the sealing performance of the butt joint of a pair of flanges, and is pressed against the sealing ring by the float, thereby further playing a sealing role, effectively preventing the mud conveying pipeline from sinking to the bottom due to water seepage at the connection node of the mud conveying pipeline body; at the same time, the float can generate buoyancy, and since the mud conveying pipeline is ensured to float on the water surface, it is not easy to sink to the bottom, which is convenient for the use of the mud conveying pipeline. The float wraps the flange to prevent the flange and the threaded rod from being directly immersed in the river water, thereby preventing the threaded rod from being corroded, loosened and broken, thereby extending the service life of the bolts and improving the frequent replacement of the bolts.

[0027] 3. Since the present invention is provided with an anti-blocking cutting assembly, the impact of silt and water flow can drive the spiral blade to rotate, thereby driving the cutting blade and the baffle to rotate synchronously through the rotating shaft. The baffle and the cutting blade are used to disperse the silt flowing through the anti-blocking cutting assembly and chop up the debris mixed in the silt, thereby preventing the debris from accumulating in the mud conveying pipeline for a long time and causing the pipeline to be blocked and burst, and at the same time, the mud conveying efficiency can be improved.

[0028] 4. The present invention has a simple structure, is easy to assemble and disassemble, and can be used in dredging operations of cutter suction dredging vessels. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a three-dimensional diagram of the dredging pipeline of the cutter suction dredging vessel of the present invention (without the buoy installed);

[0030] Figure 2 This is a three-dimensional diagram of the dredging pipeline of the cutter suction dredging vessel of the present invention (with buoys installed);

[0031] Figure 3 This is an exploded view of a pair of flanges in the dredging pipeline of a cutter suction dredging vessel according to the present invention;

[0032] Figure 4 This is an exploded view of the anti-blocking cutting assembly in the dredging pipeline of the cutter suction dredging vessel of the present invention;

[0033] Figure 5 This is a schematic diagram of the installation of an anti-blocking cutting assembly in a dredging pipeline of a cutter suction dredging vessel according to the present invention;

[0034] Figure 6 The present invention is a flow chart of a method for installing a dredging pipeline of a cutter suction dredging vessel.

[0035] In the figure, 1. mud conveying pipe body; 2. flange; 3. float; 4. sealing ring; 5. rotating shaft; 6. strong magnetic stone; 7. claw ring; 8. positioning ring; 9. limiting tooth groove; 10. clamping ring; 11. threaded rod; 12. fixing ring; 13. spiral blade; 14. guide cone; 15. cutting knife; 16. baffle. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0037] Please see the attached Figure 1 and attached Figure 2A mud delivery pipeline of a cutter suction dredging ship includes a mud delivery pipe body 1, a flange 2, a buoy 3, a connecting assembly and an anti-blocking cutting assembly; one end of two adjacent mud delivery pipe bodies 1 is respectively fixedly installed on one end of a pair of flanges 2, the anti-blocking cutting assembly is arranged in one of the flanges 2, and the other ends of the pair of flanges 2 are butt-jointed through a connecting assembly; the other ends of the pair of flanges 2 are fixedly connected by a plurality of threaded rods 11, and the plurality of threaded rods 11 are arranged at intervals along the circumferential direction of the flanges 2, so that the two adjacent mud delivery pipe bodies 1 are connected through the flanges 2; the buoy 3 is a hollow structure and is sleeved on the outside of a pair of flanges 2 and the outside of one end of the two adjacent mud delivery pipe bodies 1.

[0038] Preferably, the mud pipe body 1 can adopt a sand suction hose, and the diameter ratio of the mud pipe body 1 and the flange 2 is 1:1.5. The two adjacent mud pipe bodies 1 are butted together by a pair of flanges 2, and the pair of flanges 2 at the butt joint are clamped and connected by a connecting assembly, which can improve the connection reliability and sealing of the two adjacent mud pipe bodies 1, thereby ensuring that the entire mud pipe will not sink to the bottom of the river due to water seepage after assembly, and ensuring that the mud pipe floats on the water surface with the suction dredging vessel. At the same time, by arranging an anti-blocking cutting assembly in the mud pipe body 1, the silt entering the mud pipe body 1 and the mixed debris in the silt can be diverted and cut, reducing the volume of the debris, thereby ensuring that the mud pipe body 1 can transport mud smoothly, efficiently, and not easily blocked. The float 3 can not only wrap the connecting ends of the two mud pipe bodies 1 to achieve the purpose of waterproofing, but also play a role in auxiliary floating, further preventing the mud pipe from sinking to the bottom.

[0039] Please see the attached Figure 1 and attached Figure 3 A sealing ring 4 is embedded between the pair of flanges 2. The inner ring of the sealing ring 4 is fixedly connected between the other ends of the pair of flanges 2 through a plurality of threaded rods 11, and the inner wall of the buoy 3 is pressed against the outer ring of the sealing ring 4.

[0040] The installation of the sealing ring 4 effectively improves the sealing performance at the joint between the flanges 2. The outer diameter of the sealing ring 4 is larger than that of the flanges 2, allowing the inner wall of the buoy 3 to press against the sealing ring 4 during installation, providing a secondary seal and effectively ensuring the sealing of the entire mud pipeline. The buoy 3 can be constructed by splicing together upper and lower buoy halves, and the sealing ring 4 can be constructed by splicing together upper and lower sealing ring halves for easy installation. The sealing ring 4 can be made of nitrile rubber, providing excellent sealing performance and durability.

[0041] Please see the attached Figure 3The connecting assembly includes a claw ring 7, a positioning ring 8 and a clamping ring 10; one end of the claw ring 7 is coaxially embedded in one of the flanges 2, and the anti-blocking cutting assembly is embedded in one end of the claw ring 7; the positioning ring 8 is coaxially embedded in the other flange 2, and a plurality of circles of limiting tooth grooves 9 are formed on the inner wall of the positioning ring 8; the clamping ring 10 is circumferentially arranged at the other end of the claw ring 7, and the other end of the claw ring 7 is inserted into the other flange 2, so that the clamping ring 10 can be matched and embedded in one of the circles of limiting tooth grooves 9, so that a pair of flanges 2 can be docked through the connecting assembly.

[0042] The claw ring 7 is an annular structure composed of multiple claws. The outer diameter of one end of the claw ring 7 matches the inner diameter of the flange 2, and a limiting boss is provided to facilitate one end of the claw ring 7 to be reliably embedded in one of the flanges 2. The other end of the claw ring 7 is fixed to the limiting tooth groove 9 in the positioning ring 8 through the raised clamping ring 10, and the positioning ring 8 is fixed in the other flange 2, so that the two ends of the claw ring 7 are tied and fixed in a pair of flanges 2, thereby ensuring the reliable docking of a pair of flanges 2.

[0043] Please see the attached Figure 3 The connection assembly also includes a strong magnetic stone 6, and several strong magnetic stones 6 are arranged circumferentially on the inner wall of the other end of a pair of flanges 2, so that the other ends of a pair of flanges 2 are adsorbed and docked.

[0044] Strong magnetic attracting stones 6 with opposite magnetic properties are arranged in a pair of flanges 2, so that when the pair of flanges 2 are docked, the strong magnetic attracting stones 6 can assist in docking and positioning through mutual adsorption, and the installation is convenient and quick.

[0045] Please see the attached Figure 4 and attached Figure 5 The anti-blocking cutting assembly includes a rotating shaft 5, a fixed ring 12, a spiral blade 13, a cutting blade 15 and a baffle 16; the fixed ring 12 is installed in the claw ring 7, and the spiral blade 13, the cutting blade 15 and the baffle 16 are all installed in the fixed ring 12 through the rotating shaft 5 and can rotate synchronously with the rotating shaft 5; a plurality of spiral blades 13 are circumferentially arranged in the middle of the rotating shaft 5, a plurality of cutting blades 15 are circumferentially arranged at one end of the rotating shaft 5, and a plurality of baffles 16 are circumferentially arranged at the other end of the rotating shaft 5.

[0046] The number of spiral blades 13, cutting blades 15, and baffles 16 can be determined based on actual needs, preferably 5-6 blades evenly spaced. As sludge flows, the spiral blades 13 rotate within the retaining ring 12, driving the cutting blades 15 and baffles 16 to rotate synchronously via the rotating shaft 5. The baffles 16 can utilize a triangular frame structure to slow the flow of sludge and debris within it, ensuring that the cutting blades 15 can effectively cut through the debris. The cutting blades 15 can utilize a triangular frame structure with multiple blades spaced apart within the frame. The frame protects the blades, ensuring effective debris cutting and extending their service life.

[0047] The baffle 16, spiral blades 13 and cutting blades 15 are arranged in sequence from upstream to downstream along the sludge flow direction to ensure the deceleration and cutting effect on the sludge and impurities mixed in the sludge during the sludge flow process.

[0048] Please see the attached Figure 4 and attached Figure 5 The ends of the rotating shaft 5 are respectively formed with guide cones 14, which are conical in structure, and the tip of the cone extends to the side of the end of the rotating shaft 5. The guide cone 14 can use inertia to keep the rotating shaft 5 rotating after the rotating shaft 5 rotates, thereby achieving an effective cutting effect.

[0049] Please see the attached Figure 1 To the attached Figure 6 A method for installing a dredging pipeline of a cutter suction dredging vessel comprises the following steps:

[0050] Step 1: According to the sludge conveying distance, select the sludge conveying pipe body 1 and flange 2 and clean them before assembly.

[0051] According to the distance between the dredging pump body of the cutter suction dredging vessel and the river bank pipe or submerged pipe and the length of the mud conveying pipe body 1, a mud conveying pipe body 1 with an appropriate number of sections is selected. The number of flanges 2 should match the number of sections of the mud conveying pipe body 1, that is, two flanges 2 are used for one section of the mud conveying pipe body 1.

[0052] Before assembling the mud conveying pipe body 1 , the mud conveying pipe body 1 may be cleaned first to prevent silt and debris from remaining inside the mud conveying pipe body 1 and affecting the mud conveying efficiency of the mud conveying pipe body 1 .

[0053] Step 2: Assemble the anti-blocking cutting assembly.

[0054] Specifically, a plurality of spiral blades 13 are circumferentially mounted on the middle of the rotating shaft 5, a plurality of baffles 16 are circumferentially mounted on one end of the rotating shaft 5, a plurality of cutting blades 15 are circumferentially mounted on the other end of the rotating shaft 5, and the rotating shaft 5 is rotatably mounted in the fixed ring 12 through connecting parts such as bearings to form an anti-blocking cutting assembly.

[0055] Each mud conveying pipe body 1 is equipped with a corresponding anti-blocking cutting assembly to facilitate mud diversion during mud transportation. At the same time, the cutting blades 15 can cut debris in the mud to prevent large debris from clogging the mud conveying pipe body 1. The baffles 16 block and divert the mud and debris, preventing a large amount of mud and debris from flowing in simultaneously and affecting the cutting effect of the cutting blades 15. They also prevent the rotation of the shaft 5 from getting stuck.

[0056] Step 3: One end of the two adjacent mud conveying pipe bodies 1 is coaxially sleeved and fixed to one end of a pair of flanges 2, and the anti-blocking cutting assembly is coaxially embedded in one of the flanges 2; the other ends of the pair of flanges 2 are docked through the connecting assembly and sealed and locked through the sealing ring 4 via the threaded rod 11.

[0057] Specifically, one end of the claw ring 7 is coaxially embedded in one of the flanges 2, and the positioning ring 8 is coaxially embedded in the other flange 2. The other end of the claw ring 7 is inserted into the positioning ring 8 and the clamping ring 10 is matched and embedded in one of the circle of limiting tooth grooves 9, so that the other ends of a pair of flanges 2 are connected.

[0058] The claw ring 7 can be made of a material with a certain elasticity, such as plastic. One end of the claw ring 7 is cylindrical, which is convenient for embedding into one of the flanges 2. The other end of the claw ring 7 is an arc-shaped structure, which is convenient for inserting into the positioning ring 8 in the other flange 2. When inserted into the positioning ring 8, the claw ring 7 is contracted and squeezed by the positioning ring 8, so that the clamping ring 10 enters the positioning ring 8 and is clamped into the limiting tooth groove 9.

[0059] In the step 3, after a pair of flanges 2 are docked, the connection status of the clamping ring 10 and the limiting gear ring 9 is checked. If the clamping ring 10 and the limiting gear ring 9 are not fully engaged, the connection component is reinstalled or adjusted. If the clamping ring 10 and the limiting gear ring 9 are fully engaged, step 4 is executed.

[0060] The clamping ring 10 and the limiting tooth groove 9 play a limiting role, ensuring that the pair of flanges 2 are reliably connected and prevented from falling off.

[0061] Step 4: Coaxially sleeve the buoy 3 onto a pair of flanges 2 and one end of two adjacent mud conveying pipe bodies 1, so that the inner wall of the buoy 3 is pressed tightly against the sealing ring 3 and is locked and sealed by bolts.

[0062] In step 4, after the buoy 3 is installed, the two mud pipe bodies 1 are tested for water flow as a whole. If no leakage occurs at the connection between the two mud pipe bodies 1, step 5 is executed. If leakage occurs at the connection between the two mud pipe bodies 1, the buoy 3 is reinstalled.

[0063] The buoy 3 can be made of lightweight materials such as plastic, which plays a floating role and can effectively prevent the mud pipe from sinking to the bottom; at the same time, the buoy 3 is sealed and pressed against the outside of the connection between the two adjacent mud pipe bodies 1, which can further play a sealing role and prevent water from entering the mud pipe and sinking to the bottom.

[0064] Step 5: Repeat steps 2 to 4, connect the mud pipe body 1 through the flange 2 in sequence to form the mud pipe of the cutter suction dredging vessel, dock one end of the mud pipe with the dredging pump body of the cutter suction dredging vessel, and dock the other end of the mud pipe with the river bank pipe or the submersible pipe.

[0065] Specifically, the assembled mud pipeline is towed into the water by a workboat, towed semi-submersibly, and gradually approached to the cutter suction dredging ship. Then, one end of the assembled mud pipeline is docked with the cutter suction dredging ship. After the docking is completed, the other end of the mud pipeline is docked with the preset river bank pipe or underwater submersible pipe on the river bank.

[0066] After the cutter suction dredging vessel's dredging pipeline is installed, suction dredging operations can begin. After the operation is completed, the dredging pipeline is disassembled from the cutter suction dredging vessel and the riverbank pipe or underwater submersible pipe. The semi-submersible vessel is towed back to shore by a workboat. The dredging pipeline can be disassembled by reversing steps 4, 3, and 2 to facilitate maintenance, cleaning, and reuse.

[0067] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for installing a dredging pipeline for a cutter suction dredging vessel, characterized by: The mud delivery pipeline of the cutter suction dredging ship comprises a mud delivery pipe body (1), a flange (2), a buoy (3), a connecting assembly and an anti-blocking cutting assembly; one end of two adjacent mud delivery pipe bodies (1) is respectively fixedly mounted on one end of a pair of flanges (2), the anti-blocking cutting assembly is arranged in one of the flanges (2), and the other ends of the pair of flanges (2) are butted together through the connecting assembly; the other ends of the pair of flanges (2) are fixedly connected through a plurality of threaded rods (11), and the plurality of threaded rods (11) are arranged at intervals along the circumference of the flanges (2), so that the two adjacent mud delivery pipe bodies (1) are connected through the flanges (2); the buoy (3) is a hollow structure and is sleeved on the outside of the pair of flanges (2) and the outside of one end of the two adjacent mud delivery pipe bodies (1); A sealing ring (4) is embedded between the pair of flanges (2), the inner ring of the sealing ring (4) is fixedly connected between the other ends of the pair of flanges (2) through a plurality of threaded rods (11), and the inner wall of the buoy (3) is pressed against the outer ring of the sealing ring (4); The connecting assembly comprises a claw ring (7), a positioning ring (8) and a clamping ring (10); one end of the claw ring (7) is coaxially embedded in one of the flanges (2), and the anti-blocking cutting assembly is embedded in one end of the claw ring (7); the positioning ring (8) is coaxially embedded in the other flange (2), and a plurality of rings of limiting tooth grooves (9) are formed on the inner wall of the positioning ring (8); the clamping ring (10) is circumferentially arranged at the other end of the claw ring (7), and the other end of the claw ring (7) is inserted into the other flange (2), so that the clamping ring (10) can be matched and embedded in one of the rings of limiting tooth grooves (9), thereby allowing a pair of flanges (2) to be docked through the connecting assembly; The installation method of the cutter suction dredging vessel's dredging pipeline comprises the following steps: Step 1: Select the sludge conveying pipe body (1) and flange (2) according to the sludge conveying distance and clean them before assembly; Step 2: Assemble the anti-blocking cutting assembly; Step 3: One end of the two adjacent mud conveying pipe bodies (1) is coaxially sleeved and fixed to one end of a pair of flanges (2), and the anti-blocking cutting assembly is coaxially embedded in one of the flanges (2); the other ends of the pair of flanges (2) are butted together through the connecting assembly and sealed and locked through the sealing ring (4) via the threaded rod (11); Step 4: Coaxially sleeve the buoy (3) onto the outside of a pair of flanges (2) and one end of two adjacent mud delivery pipe bodies (1), so that the inner wall of the buoy (3) is pressed tightly against the sealing ring (4) and is locked and sealed by bolts; Step 5: Repeat steps 2 to 4, and connect the mud pipe body (1) in sequence through the flange (2) to form the mud pipe of the cutter suction dredging vessel, dock one end of the mud pipe with the dredging pump body of the cutter suction dredging vessel, and dock the other end of the mud pipe with the river bank pipe or the submersible pipe.

2. The method for installing a dredging vessel's dredging pipeline according to claim 1, wherein: In the step 2, the anti-blocking cutting assembly includes a rotating shaft (5), a fixed ring (12), a spiral blade (13), a cutting blade (15) and a baffle (16); a plurality of spiral blades (13) are respectively circumferentially mounted on the middle part of the rotating shaft (5), a plurality of baffles (16) are respectively circumferentially mounted on one end of the rotating shaft (5), a plurality of cutting blades (15) are respectively circumferentially mounted on the other end of the rotating shaft (5), and the rotating shaft (5) is rotatably mounted in the fixed ring (12), thereby constituting the anti-blocking cutting assembly.

3. The method for installing a dredging vessel's dredging pipeline according to claim 1, wherein: In the step 3, the connection assembly includes a claw ring (7), a positioning ring (8) and a clamping ring (10); one end of the claw ring (7) is coaxially embedded in one of the flanges (2), and the positioning ring (8) is coaxially embedded in the other flange (2); the other end of the claw ring (7) is inserted into the positioning ring (8) and the clamping ring (10) is matched and embedded in one of the circle of limiting tooth grooves (9), so that the other ends of the pair of flanges (2) are connected; After the pair of flanges (2) are docked, the connection status of the clamping ring (10) and the limiting tooth groove (9) is checked. If the clamping ring (10) and the limiting tooth groove (9) are not completely clamped, the connection assembly is reinstalled or adjusted. If the clamping ring (10) and the limiting tooth groove (9) are completely clamped, step 4 is performed.

4. The method for installing a dredging vessel's dredging pipeline according to claim 1, wherein: In step 4, after the buoy (3) is installed, the two mud pipe bodies (1) are subjected to an overall water flow test. If no leakage occurs at the connection between the two mud pipe bodies (1), step 5 is performed. If leakage occurs at the connection between the two mud pipe bodies (1), the buoy (3) is reinstalled.

5. The method for installing a dredging pipeline for a cutter suction dredging vessel according to claim 1 is characterized by: The connection assembly further comprises strong magnetic absorbers (6), and a plurality of strong magnetic absorbers (6) are respectively arranged circumferentially on the inner walls of the other ends of the pair of flanges (2), so that the other ends of the pair of flanges (2) are adsorbed and docked.

6. The method for installing a dredging pipeline for a cutter suction dredging vessel according to claim 1, wherein: The anti-blocking cutting assembly comprises a rotating shaft (5), a fixed ring (12), a spiral blade (13), a cutting blade (15) and a baffle (16); the fixed ring (12) is installed in the claw ring (7), the spiral blade (13), the cutting blade (15) and the baffle (16) are all installed in the fixed ring (12) through the rotating shaft (5) and can rotate synchronously with the rotating shaft (5); a plurality of spiral blades (13) are circumferentially arranged at the middle of the rotating shaft (5), a plurality of cutting blades (15) are circumferentially arranged at one end of the rotating shaft (5), and a plurality of baffles (16) are circumferentially arranged at the other end of the rotating shaft (5); the baffle (16), the spiral blade (13) and the cutting blade (15) are arranged in sequence from upstream to downstream along the sludge flow direction.

7. The method for installing a dredging pipeline for a cutter suction dredging vessel according to claim 6, wherein: Guide cones (14) are respectively formed at both ends of the rotating shaft (5). The guide cones (14) are of a conical structure, and the tip of the cone extends to the side of the end of the rotating shaft (5).

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