Sludge suction and discharge device and sludge suction and discharge method suitable for ocean facilities

Abstract

The invention discloses a mud suction and discharge device and method suitable for ocean facilities, and relates to the technical field of ocean facilities, and the mud suction and discharge device comprises a fixed supporting frame used for installing a working platform; the mud suction and discharge assembly comprises a drill rod, a power head is arranged at the first end of the drill rod, the output end of the power head is connected with a drill bit, and a high-pressure spray head is arranged on the drill bit; the sludge discharge pipe is arranged at the first end of the drill rod; and the cable arrangement device is connected with the sludge suction and discharge assembly. According to the sludge suction and discharge device and the sludge suction and discharge method suitable for the ocean facilities, the technical problem that the construction efficiency is low due to the fact that an existing sludge flushing device in a pile pipe performs sludge flushing and slurry discharge separately is solved, crushed silt is scattered through a high-pressure spray head and mixed with the silt to form solid-liquid two-body mixed liquid, and the construction efficiency is improved. And then high-pressure gas is conveyed to be further mixed with the silt to form gas-liquid-solid three-body mixed liquid, the gas-liquid-solid three-body mixed liquid is sucked and discharged to the outer side of the steel pile, the mud flushing work and the mud discharging work are synchronously conducted, and the construction efficiency is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of marine facility technology, and in particular to a sludge suction and discharge device and method suitable for marine facilities. Background Technology

[0002] Dredging and removing sediment from marine facilities is a complex task that requires consideration of various human and natural factors, as well as diverse technical support. Taking offshore steel piles as an example, pile removal must be carried out by cutting at a depth of 4 meters below the mud surface, typically using either an internal or external cutting method. The external cutting method requires creating a large pit outside the steel pile with sufficient space for cutting, and for safety reasons, the pit needs a slope, increasing the difficulty of construction. The internal cutting method requires first removing all the sediment from inside the steel pile, and is constrained by many factors, including the removal depth, pile inclination, mud quality, and the internal space of the steel pile. However, compared to the external cutting method, which requires digging a pit outside the steel pile, this method involves less work and carries less risk. The existing pile pipe flushing device achieves large-scale liquefaction of silt inside the pile pipe by setting a first nozzle, a second nozzle, and a third nozzle in the pile pipe flushing device. By setting up a flushing device and a surrounding flushing pipe, the silt inside the flushing cylinder is flushed and cleaned to prevent clogging. The silt is discharged to a distant location through the silt discharge pile pipe to avoid backfilling, thus solving the problem of silt in vertical pipes and creating a dry and wet working environment inside the pipe, providing favorable conditions for cutting inside the pile pipe.

[0003] However, due to the limited working area inside the pile pipe, existing pile pipe flushing devices separate flushing and slurry removal operations, resulting in low construction efficiency. Furthermore, when the distance between the flushing device and the seabed mud surface target is zero or negative, there are no corresponding control measures, making it impossible to efficiently and safely complete the internal dredging work. Therefore, this paper proposes a slurry suction and discharge device and method suitable for marine facilities to address the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a sludge suction and discharge device suitable for marine facilities, which solves the technical problem of low construction efficiency caused by the existing pile pipe flushing device which separates the flushing and slurry discharge work.

[0005] To achieve the above objectives, the present invention provides a sludge suction and discharge device suitable for marine facilities, comprising:

[0006] A fixed support frame is provided at the upper end of the steel pile, and the fixed support frame is used to install the working platform;

[0007] A sludge suction and discharge assembly is disposed within the steel pile, and the sludge suction and discharge assembly includes:

[0008] A drill rod, the first end of which is provided with a power head, the output end of which is connected to a drill bit, which is used to loosen mud and sand;

[0009] A high-pressure nozzle is installed on the drill bit, and the high-pressure nozzle is used to spray mud and sand.

[0010] A mud discharge pipe is located at the first end of the drill rod and is used to pump out mud and sand.

[0011] An engineering vessel is moored near the steel pile. A cable-laying device is installed on the engineering vessel, and the cable-laying device is connected to the suction and discharge assembly via a lifting cable.

[0012] Preferably, a pulley system is provided on the fixed support frame, the pulley system comprising: a first fixed pulley connected to the top surface of the working platform via a first fixed frame; a second fixed pulley connected to the top of the fixed support frame via a second fixed frame; and a movable pulley connected to the drill rod via a pull rope, the lifting cable passing sequentially through the first fixed pulley, the second fixed pulley and the movable pulley to connect to the second fixed frame.

[0013] Preferably, the outer wall of the drill rod is provided with a guide support member, which is slidably connected to the inner wall of the steel pile.

[0014] Preferably, a high-pressure water pump is provided on the top surface of the working platform, and the high-pressure water pump is connected to the high-pressure nozzle through a water injection pipeline.

[0015] Preferably, the first end of the drill rod is provided with several air supply pipes, and the top surface of the working platform is provided with an air compressor, which is connected to several air supply pipes through an air injection line.

[0016] Preferably, the gas pipeline is L-shaped as a whole, and the gas outlet of the gas pipeline faces the mud and sand.

[0017] Preferably, the workboat is equipped with a sedimentation tank, and the sedimentation tank is equipped with a return pipe, the other end of which is connected to the interior of the steel pile.

[0018] Preferably, the upper end of the sludge discharge pipe is provided with an extension pipe, the extension pipe is fixed on a fixed support frame, and one end of the extension pipe is located above the sedimentation tank.

[0019] Accordingly, the technical solution of the present invention also provides a sludge suction and discharge method for a sludge suction and discharge device suitable for marine facilities, including:

[0020] S1: Fix the fixed support frame above the steel pile, and use the cable puller to lift the sludge suction and discharge assembly and put it into the steel pile through the lifting cable, and control the height and position of the sludge suction and discharge assembly inside the steel pile.

[0021] S2: The drill bit drills into the mud and sand inside the steel pile, and the high-pressure nozzle sprays drilling fluid into the steel pile at high speed. The drilling fluid disperses and mixes with the mud and sand. High-pressure gas is then transported into the steel pile through the gas pipeline. After the high-pressure gas, drilling fluid and mud and sand are mixed, they are discharged out of the steel pile through the mud discharge pipe until the mud and sand inside the steel pile are cleaned up.

[0022] Preferably, the step of drilling the mud and sand inside the steel pile with the drill bit includes: first using a rotary drill bit to completely break up the concrete cement, and then using a scraper drill bit to drill away the mud and sand underwater.

[0023] Compared to the aforementioned background technology, the present invention provides a mud suction and discharge device suitable for marine facilities, which has the following beneficial effects: A drill bit is used to break up the mud and sand inside the steel pile, and then a high-pressure nozzle sprays drilling fluid at high speed to disperse the mud and sand and mix it into a solid-liquid mixture. A gas pipe delivers high-pressure gas into the steel pile, which further mixes with the mud and sand to form a gas-liquid-solid mixture. Utilizing the air-lift reverse circulation principle, the gas-liquid-solid mixture is suctioned and discharged to the outside of the steel pile, achieving simultaneous mud discharge, flushing, and slurry removal, effectively improving construction efficiency. Furthermore, it eliminates the need for manual intervention in seabed construction, reducing safety risks and construction costs. On the other hand, the cable guide precisely controls the distance between the mud suction and discharge components and the mud surface inside the steel pile through the lifting cable, ensuring that the high-pressure nozzle maintains a constant distance from the mud surface. This ensures that the drilling fluid sprayed by the high-pressure nozzle exerts optimal impact on the mud and sand, allowing for thorough mixing of the mud and sand with the drilling fluid, effectively improving the mud and sand discharge efficiency inside the steel pile. The sludge suction and discharge method used in this invention for marine facilities also has the above-mentioned beneficial effects. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 This is a plan view of the sludge suction and discharge device provided in an embodiment of the present invention;

[0026] Figure 2 This is a plan view of the sludge suction and discharge assembly provided in an embodiment of the present invention;

[0027] Figure 3 This is a plan view of the pulley system provided in an embodiment of the present invention.

[0028] Specifically, 1-Air compressor; 2-High-pressure water pump; 3-Fixed support frame; 4-Sludge suction and discharge assembly; 401-Drill rod; 402-Air inlet; 403-Power head; 404-Guide support component; 405-Water inlet; 406-Air supply pipe; 407-Sludge discharge pipe; 408-Drill bit; 409-High-pressure nozzle; 410-Lifting cable; 5-Steel pile; 6-Return pipe; 7-Sedimentation tank; 8-Cable pulley; 9-Engineering vessel; 10-Sediment; 11-Pulley block; 1101-First fixed pulley; 1102-Second fixed pulley; 1103-Moving pulley. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figure 1 and Figure 2 As shown, in order to achieve the above objectives, the present invention provides a sludge suction and discharge device suitable for marine facilities, comprising: a fixed support frame 3 set at the upper end of a steel pile 5, wherein the lower end of the steel pile 5 is buried in the seabed, a working platform is installed on the fixed support frame 3, the top surface of the working platform coincides with the horizontal plane, which helps workers to walk and carry out construction normally on the working platform, and guardrails are installed around the working platform to prevent workers from falling from the working platform into the seawater.

[0032] A mud suction and discharge assembly 4 is placed inside the steel pile 5. Specifically, a cable puller 8 is connected to the mud suction and discharge assembly 4 via a lifting cable 410. The cable puller 8 lifts the mud suction and discharge assembly 4 via the lifting cable 410 and places it into the steel pile 5. The mud suction and discharge assembly 4 includes: a drill rod 401, with a power head 403 at the lower end of the drill rod 401. The output end of the power head 403 is connected to a drill bit 408, which provides driving force to the drill bit 408. The drill bit 408 rotates to loosen and break up the mud and sand 10.

[0033] A high-pressure nozzle 409 is installed on the drill bit 408. The high-pressure nozzle 409 is used to spray mud and sand 10. The lower end of the drill rod 401 is equipped with a mud discharge pipe 407, which is used to suck up the mud and sand 10. Specifically, the high-pressure nozzle 409 sprays drilling fluid at high speed. The drilling fluid can be seawater near the steel pile 5. The mud and sand 10 after being broken by the drill bit 408 is dispersed and mixed with it to form a solid-liquid two-body mixture. Then, high-pressure gas is transported into the steel pile 5 through the gas supply pipe 406. The high-pressure gas is further mixed with the mud and sand 10 to form a gas-liquid-solid three-body mixture. The gas-liquid-solid three-body mixture is sucked out to the outside of the steel pile 5 through the mud discharge pipe 407.

[0034] An engineering vessel 9 is moored near the steel pile 5. The engineering vessel 9 is located at sea level, and a cable unloader 8 is installed on the engineering vessel 9 for easy maintenance and operation by workers. The cable unloader unwinds and rewinds the hoisting cable 410, thereby controlling the rise and fall of the mud suction and discharge assembly 4. While ensuring that the drill bit 408 rotates at high speed to drill the mud and sand 10, the high-pressure nozzle 409 maintains the optimal distance between itself and the mud and sand 10. That is, it precisely controls the height position of the mud suction and discharge assembly 4 inside the steel pile 5, ensuring that the drilling fluid sprayed by the high-pressure nozzle 409 has the best impact force on the mud and sand 10, so that the mud and sand 10 are fully dispersed, thereby ensuring that the mud and sand 10 are fully mixed with the drilling fluid.

[0035] In use, the fixed support frame 3 is fixed above the steel pile 5. The cable puller 8 lifts the mud suction and discharge assembly 4 and places it into the steel pile 5 using the lifting cable 410. The drill bit 408 drills the mud and sand 10 inside the steel pile 5. The high-pressure nozzle 409 sprays drilling fluid into the steel pile 5 at high speed. The drilling fluid disperses and mixes with the mud and sand 10. The cable puller 8 controls the height of the mud suction and discharge assembly 4 inside the steel pile 5 using the lifting cable 410 to ensure that the drilling fluid sprayed by the high-pressure nozzle 409 is effective against the mud and sand. The mud and sand 10 generate the best impact force, and can be fully mixed with the drilling fluid to provide a carrier for the gas lift reverse circulation operation. High-pressure gas is delivered into the steel pile 5 through the gas pipeline 406. After the high-pressure gas, drilling fluid and mud and sand 10 are mixed, they become a gas-liquid-solid mixture. The gas-liquid-solid mixture is sucked and discharged to the outside of the steel pile 5 using the gas lift reverse circulation principle, so as to realize the simultaneous operation of mud discharge, mud flushing and slurry discharge in the steel pile 5, effectively improving the mud and sand 10 discharge efficiency inside the steel pile 5.

[0036] like Figure 3As shown, a pulley block 11 is installed on the fixed support frame 3. Specifically, the pulley block 11 includes: a first fixed pulley 1101, connected to the top surface of the working platform via a first fixed frame; a second fixed pulley 1102, connected to the top of the fixed support frame 3 via a second fixed frame; and a movable pulley 1103, connected to the drill rod 401 via a pull rope. The lifting cable 410 passes sequentially through the first fixed pulley 1101, the second fixed pulley 1102, and the movable pulley 1103, connecting to the second fixed frame. The pulley block 11 reduces the force applied when the sludge suction and discharge assembly 4 is wound up, ensuring stable ascent or descent while reducing the power consumption of the sludge suction and discharge assembly and lowering equipment operating costs. The fixed support frame 3 should be designed to meet strength requirements, ensuring that the first and second fixed frames can withstand the weight of the sludge suction and discharge assembly 4.

[0037] Specifically, when the hoisting device releases the lifting cable 410, the sludge suction and discharge assembly 4 and the movable pulley 1103 descend under their own weight, completing the lower part of the sludge suction and discharge assembly 4. When the hoisting device retracts the lifting cable 410, the lifting cable 410 drives the movable pulley 1103 to rise, and the movable pulley 1103 drives the sludge suction and discharge assembly 4 to rise synchronously, completing the lifting of the sludge suction and discharge assembly 4. The lifting cable 410 passes sequentially through the first fixed pulley 1101, the second fixed pulley 1102, and the movable pulley 1103 to change its direction of motion, driving the sludge suction and discharge assembly 4 to rise and fall, ensuring the normal operation of the sludge suction and discharge device and preventing accidents.

[0038] In the second embodiment of the present invention, the mud suction and discharge device is placed directly on the fixed support frame 3 or the working platform. At this time, the mud suction and discharge device will not change its position with the movement of the engineering vessel 9, which can effectively ensure the positional stability of the mud suction and discharge assembly 4 inside the steel pile 5, and ensure that the drilling fluid sprayed by the high-pressure nozzle 409 always produces the best impact force on the mud and sand 10, thereby ensuring the efficiency of mud and sand 10 discharge inside the steel pile 5.

[0039] In one embodiment of the present invention, a guide support member 404 is provided on the outer wall of the drill rod 401. The guide support member 404 is slidably connected to the inner wall of the steel pile 5. The guide support member 404 limits the relative rotation between the drill rod 401 and the steel pile 5, ensuring that the drill rod 401 will not rotate relative to the steel pile 5 when the drill bit 408 rotates at high speed, thus ensuring that the drill bit 408 can drill normally into the mud and sand 10. In addition, the guide support member 404 and the inner wall of the steel pile 5 are slidably connected in the axial direction, thereby ensuring that the suction and discharge assembly 4 can rise freely under the pulling action of the lifting cable 410. At the same time, when the discharge device unwinds the lifting cable 410 and the lifting cable 410 no longer has a pulling action on the suction and discharge assembly 4, the suction and discharge assembly 4 can descend freely under its own gravity.

[0040] In one embodiment of the present invention, a high-pressure water pump 2 is provided on the top surface of the working platform. The high-pressure water pump 2 is connected to a high-pressure nozzle 409 through a water injection pipeline. Specifically, a water inlet 405 is provided at the lower end of the drill rod 401. The water inlet 405 is connected to the high-pressure nozzle 409 through an internal pipe. The water injection pipeline is sealed to the water inlet 405. The high-pressure water pump 2 draws seawater from the outside of the steel pile 5 and delivers the seawater to the high-pressure nozzle 409 through the water injection pipeline. The high-pressure nozzle 409 sprays out at high speed when the drill bit 408 is drilling the mud and sand 10, further dispersing the mud and sand 10 and mixing it with it.

[0041] It should be noted that the high-pressure nozzle 409 is located above the drill bit 408. When the drill bit 408 is drilling into the mud and sand 10, the high-pressure nozzle 409 is at a certain distance from the mud and sand 10 to ensure that the drilling fluid sprayed by the high-pressure nozzle 409 produces the best impact force on the mud and sand 10.

[0042] In addition, the lower end of the drill rod 401 is provided with several air supply pipes 406, specifically two. The top surface of the working platform is provided with an air compressor 1, which is connected to several air supply pipes 406 through an air injection line. Specifically, the lower end of the drill rod 401 is provided with an air inlet 402, which is connected to the upper end of the air supply pipe 406. The lower end of the air supply pipe 406 is provided with an air outlet. The air compressor 1 produces high-pressure gas and delivers it to the air supply pipe 406 through the air injection line. The air supply pipe 406 delivers the high-pressure gas to the steel pile 5 through the air outlet. The high-pressure gas is further mixed with the mud and sand 10 to form a gas-liquid-solid mixture. The gas-liquid-solid mixture is pumped into the mud discharge pipe 407 using the air lift reverse circulation principle, and then discharged from the steel pile 5 through the mud discharge pipe 407.

[0043] In addition, the workboat is equipped with a sedimentation tank 7. The gas-liquid-solid mixture is discharged from the steel pile 5 through the sludge discharge pipe 407 and then enters the sedimentation tank 7. After sedimentation in the sedimentation tank 7, the discharged solid sludge 10 is collected and treated, preventing it from entering the seawater, thus playing a role in marine environmental protection. Furthermore, a return pipe 6 is installed in the sedimentation tank 7. The right end of the return pipe 6 is connected to the sedimentation tank 7, and the left end of the return pipe 6 extends into the steel pile 5. The liquid in the sedimentation tank 7 is diverted back into the steel pile 5 through the return pipe 6, achieving recycling and reducing water waste. A filter screen is installed at the end of the return pipe 6 located in the sedimentation tank 7 to prevent the sludge 10 in the sedimentation tank 7 from entering the steel pile 5.

[0044] In one embodiment of the present invention, the gas delivery pipe 406 is generally L-shaped, and the outlet of the gas delivery pipe 406 faces the sediment 10. The L-shaped gas delivery pipe 406 allows the gas delivery pipe 406 to blow the sediment 10 inside the steel pile 5 with the maximum area, thereby improving the mixing efficiency of high-pressure gas, sediment 10, and seawater. Correspondingly, the sludge discharge pipe 407 is generally L-shaped. The L-shaped sludge discharge pipe 407 allows the sludge discharge pipe 407 to draw the gas-liquid-solid mixture inside the steel pile 5 with the maximum area, thereby improving the mixing efficiency of high-pressure gas, sediment 10, and seawater, and further improving the discharge efficiency of sediment 10 inside the steel pile 5. It should be noted that the upper end of the sludge discharge pipe 407 is provided with an extension pipe, which is fixed on the fixed support frame 3, and the right end of the extension pipe is always located above the sedimentation tank 7 to ensure that the sludge discharge pipe 407 can accurately deliver the gas-liquid-solid mixture into the sedimentation tank 7 for centralized collection.

[0045] The sludge suction and discharge method for marine facilities adopted in this invention specifically includes the following steps: a fixed support frame 3 is fixed above a steel pile 5; a cable-laying device 8 on the engineering vessel 9 is connected to a sludge suction and discharge assembly 4 via a lifting cable 410; the lifting cable 410, driven by the cable-laying device 8, passes sequentially through a first fixed pulley 1101, a second fixed pulley 1102, and a movable pulley 1103, lowering the sludge suction and discharge assembly 4 into the steel pile 5; and the cable-laying device 8 controls the sludge suction and discharge assembly 4's position on the steel pile 5 via the lifting cable 410. At the height position inside pile 5, drill bit 408 drills the mud and sand 10 inside steel pile 5, and high-pressure nozzle 409 sprays drilling fluid into steel pile 5 at high speed. The drilling fluid disperses and mixes with the mud and sand 10, providing a carrier for gas lift reverse circulation. High-pressure gas is delivered into steel pile 5 through gas pipe 406. After the high-pressure gas, drilling fluid and mud and sand 10 are mixed, they are discharged outside steel pile 5 through mud discharge pipe 407. Cable puller 8 drives the suction and discharge assembly 4 to slowly descend through lifting cable 410 until the mud and sand 10 inside steel pile 5 is cleaned.

[0046] It should be noted that, since the steel pile 5 contains concrete cement for fixing it, the steps of drilling the mud and sand 10 inside the steel pile 5 with the drill bit 408 include: first, using the rotary drill bit 408 to completely break up the concrete cement, and then using the scraper drill bit 408 to drill away the underwater mud and sand 10, thereby effectively improving the efficiency of mud removal and making the overall mud suction and removal device applicable to different mud types, thus improving the efficiency of mud removal. In addition, a water eye (not shown in the figure) is provided on the front end face of the rotary drill bit, which is connected to a water injection pipeline to improve the concrete cement breaking efficiency of the rotary drill bit, further improving the efficiency of mud removal.

[0047] In summary, after the mud and sand 10 are crushed, drilling fluid is sprayed at high speed through the high-pressure nozzle 409 to disperse and mix with the mud and sand 10, forming a solid-liquid two-body mixture. Then, high-pressure gas is transported to further mix with the mud and sand 10, forming a gas-liquid-solid three-body mixture. The gas-liquid-solid three-body mixture is then sucked out to the outside of the steel pile 5 using the air-lift reverse circulation principle. The mud flushing and slurry discharge work are carried out simultaneously, effectively improving construction efficiency. Moreover, the distance between the mud suction and discharge assembly 4 and the mud surface inside the steel pile 5 is precisely controlled by the lifting cable 410, ensuring that the drilling fluid sprayed by the high-pressure nozzle 409 generates the optimal impact force on the mud and sand 10, allowing the mud and sand 10 to mix fully with the drilling fluid, further improving the mud and sand 10 discharge efficiency inside the steel pile 5.

[0048] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0049] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A sludge suction and discharge device suitable for marine facilities, characterized in that, include: A fixed support frame is provided at the upper end of the steel pile, and the fixed support frame is used to install the working platform; A sludge suction and discharge assembly is disposed within the steel pile, and the sludge suction and discharge assembly includes: A drill rod, the first end of which is provided with a power head, the output end of which is connected to a drill bit, which is used to loosen mud and sand; A high-pressure nozzle is installed on the drill bit, and the high-pressure nozzle is used to spray mud and sand. A mud discharge pipe is located at the first end of the drill rod and is used to pump out mud and sand. An engineering vessel is moored near the steel pile. A cable-laying device is installed on the engineering vessel, and the cable-laying device is connected to the suction and discharge assembly via a lifting cable.

2. A sludge suction and discharge device suitable for marine facilities according to claim 1, characterized in that, The fixed support frame is equipped with a pulley system, which includes: a first fixed pulley connected to the top surface of the working platform via a first fixed frame; a second fixed pulley connected to the top of the fixed support frame via a second fixed frame; and a movable pulley connected to the drill rod via a pull rope. The lifting cable passes through the first fixed pulley, the second fixed pulley, and the movable pulley in sequence and connects to the second fixed frame.

3. A sludge suction and discharge device suitable for marine facilities according to claim 2, characterized in that, The outer side wall of the drill rod is provided with a guide support member, which is slidably connected to the inner side wall of the steel pile.

4. A sludge suction and discharge device suitable for marine facilities according to claim 3, characterized in that, The top surface of the working platform is equipped with a high-pressure water pump, which is connected to the high-pressure nozzle through a water injection pipeline.

5. A sludge suction and discharge device suitable for marine facilities according to claim 4, characterized in that, The first end of the drill rod is provided with several air supply pipes, and the top surface of the working platform is provided with an air compressor. The air compressor is connected to several air supply pipes through an air injection line.

6. A sludge suction and discharge device suitable for marine facilities according to claim 5, characterized in that, The gas pipeline is L-shaped, and its outlet faces the mud and sand.

7. A sludge suction and discharge device suitable for marine facilities according to any one of claims 1-6, characterized in that, The workboat is equipped with a sedimentation tank, which contains a return pipe. The other end of the return pipe is connected to the interior of the steel pile.

8. A sludge suction and discharge device suitable for marine facilities according to claim 7, characterized in that, The upper end of the sludge discharge pipe is provided with an extension pipe, which is fixed on a fixed support frame, and one end of the extension pipe is located above the sedimentation tank.

9. A method for suction and discharge of sludge suitable for marine facilities, characterized in that, The sludge suction and discharge device applicable to marine facilities according to any one of claims 1-8 comprises: S1: The cable puller lifts the sludge suction and discharge assembly into the steel pile using the lifting cable, and controls the height and position of the sludge suction and discharge assembly inside the steel pile; S2: The drill bit drills into the mud and sand inside the steel pile, and the high-pressure nozzle sprays drilling fluid into the steel pile at high speed. The drilling fluid disperses and mixes with the mud and sand. High-pressure gas is then transported into the steel pile through the gas pipeline. After the high-pressure gas, drilling fluid and mud and sand are mixed, they are discharged out of the steel pile through the mud discharge pipe until the mud and sand inside the steel pile are cleaned up.

10. A sludge suction and discharge method suitable for marine facilities according to claim 9, characterized in that, The steps of drilling the mud and sand inside the steel pile include: first, using a rotary drill bit to completely break up the concrete cement, and then using a scraper drill bit to drill away the mud and sand underwater.

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