151results about "Hull parts" patented technology

The invention discloses an underwater robot with a splicing function and a method thereof, and belongs to the field of underwater robots, the underwater robot comprises a waterproof shell, a sensing module, a main control module, a power supply module and a rotary splicing module; the sensing module is used for environment sensing, the main control module is used for decision control, the power supply module provides energy support, the rotary splicing module is a core module of the robot, a rotary telescopic mechanism comprising a rotary shaft telescopic arm and a limiting rotor is creatively provided, and the rotary telescopic mechanism can be matched with limiting grooves in waterproof shells of other single robots. And splicing of the underwater robot is realized. According to the scheme of combining the underwater robot through the rotary splicing mechanism, independent operation or group operation can be selected according to the use scene, the combination shape can be switched during group operation to meet the task requirement, and the group task which cannot be completed by a traditional individual robot is achieved; therefore, the adaptability and execution capability of the underwater robot to complex tasks and environments are improved.

The invention discloses an unmanned underwater vehicle floating material fixing structure, and relates to the technical field of underwater vehicle buoyancy materials. In order to solve the problems that in the prior art, a buoyancy material of an underwater vehicle is generally fixedly connected with the vehicle through a bolt, a polycarbonate protective layer is sprayed outside a hollow glass bead floating material, the floating material is easily damaged by replacing the buoyancy material and disassembling the bolt in the later period, and the buoyancy material is relatively fragile and cannot be damaged. The floating material is abraded due to repeated disassembly, and the polycarbonate protective layer is easy to fall off after long time, and the like. The device comprises a floating material, a screw sleeve, a nut sleeve and a protective layer, the floating material is arranged in an aircraft cabin composed of a framework and a non-pressure-resistant shell, a bolt through hole is machined in the floating material, a screw sleeve and a nut sleeve are embedded in the bolt through hole, and the outer portion of the floating material is integrally wrapped with a protective layer. The method is used for mounting and fixing the floating material of the unmanned underwater vehicle.

The invention discloses an offshore photovoltaic support loading and unloading type shipping and stacking tool and a lightering operation method thereof. The tool comprises a barge widening and reinforcing tool, a photovoltaic support mounting tool and a stacking tool. The barge widening and reinforcing tool is composed of a plurality of sets of extending mechanisms which are symmetrically arranged on ship boards on the left side and the right side of a barge, and each set of extending mechanism is composed of a plurality of extending assemblies. The photovoltaic support installation tool comprises a plurality of sets of guide assemblies composed of a plurality of guide pipes, the guide assemblies are distributed on the extension assembly and the deck, and supporting legs are further arranged at the centers of the guide pipes. The stacking tool is composed of a plurality of stacking assemblies, each stacking assembly is composed of a plurality of stacking supports, the top sides of the stacking supports are provided with support guide pipes and support supporting legs which are the same as and correspond to the guide pipes and the supporting legs respectively, and the bottom sides of the stacking supports are connected with the guide assemblies. The tool is simple in structural design and convenient to assemble, disassemble and operate, stacking arrangement and fixation of the offshore photovoltaic support in the height direction of the barge can be achieved, the transportation efficiency is improved in the lightering operation, and the cost is reduced.

The split mounting type non-self-propelled cutter suction dredger body structure comprises a main buoyancy tank and side buoyancy tanks, and each side buoyancy tank is formed by sequentially connecting a first-section side buoyancy tank single body, a middle-section side buoyancy tank single body and a tail-section side buoyancy tank single body; a first sealing transition void cabin and a second sealing transition void cabin are arranged at the splicing ends of the head section and the middle edge buoyancy tank single bodies and are in sealing connection through fasteners; a third sealed transition void is arranged on the side, close to the main buoyancy tank, of the middle side buoyancy tank single body, a fourth sealed transition void is arranged on the side, close to the middle side buoyancy tank single body, of the tail side buoyancy tank single body, a fifth sealed transition void is further arranged on the tail side buoyancy tank single body, and the third sealed transition void and the fifth sealed transition void are connected with the main buoyancy tank in a sealed mode. A main buoyancy tank sealing chamber corresponding to the sealed transition void is welded to the inner wall of the main buoyancy tank body, a sealing assembly is arranged between the main buoyancy tank sealing chamber and the sealed transition void, and sealed connection or detachment of the side buoyancy tanks and the main buoyancy tank is achieved by operating the sealed transition void. The structure is matched with the sealing transition void and the sealing assembly, the problems that a traditional splicing mode is low in construction efficiency, poor in sealing performance, inconvenient to maintain and the like are effectively solved, and the ship body splicing construction efficiency and reliability are improved.

The invention discloses a multi-mode wave propulsion unmanned vehicle, which relates to the technical field of unmanned vehicles and comprises a vehicle main body, a dynamic buoyancy adjusting module, a multifunctional intelligent sensing and communication system, a flexible solar power generation unit, an emergency load rejection device, a hanging cable and a dual-mode propulsion system. The wave energy capturing efficiency is improved through the wing body fusion or rotary body wing adding design of the navigation body main body; the dynamic buoyancy adjusting module controls the diving speed and depth through double closed loops; the multifunctional intelligent sensing and communication system integrates a multi-source sensor and a multi-mode communication unit, improves the environment sensing capability and the information transmission efficiency, and has a hierarchical threat response mechanism and the like. The underwater vehicle has the multi-mode movement capacity of water surface cruising, near-water-surface navigation, underwater sneaking and the like, integrates multiple functional modules of wave energy propelling, active propelling, intelligent sensing, dynamic buoyancy adjusting and the like, and aims at improving the cruising ability, the environmental adaptability and the autonomous operation capacity of the underwater vehicle.

The invention discloses a wind-driven wing sail type unmanned sailing boat, comprising: a boat body comprising a water surface part and an underwater part, the water surface part being provided with a deck, the deck being provided with a solar panel, the underwater part being provided with a keel and a rudder blade; the wing sail is connected with the ship body through a sail rotating mechanism and used for providing sailing driving force, the wing sail is of a symmetrical structure, and flexible solar panels are embedded in the left side face and the right side face of the wing sail; the rudder blade is connected with the ship body through a rudder shifting mechanism and used for controlling the course; and the energy storage and control module is arranged in the ship body and used for being connected with the solar panel, storing energy and controlling the sail rotating mechanism and the rudder rotating mechanism to operate. The wing sail skin of a carbon fiber / PVC three-layer sandwich structure is adopted and matched with the variable-cross-section carbon fiber rib plate, balance of light weight and flutter resistance is achieved, the double integration mode of the solar cell is adopted, the flexible solar panels on the two sides of the wing sail and the deck monocrystalline silicon cell form a complementary power supply network, the autonomous survivability is high, and the requirement for ocean sailing is met.

The invention relates to a wing-shaped structure hydrodynamic noise control device with a heated internal wall surface and a porous medium coated outside, and belongs to the field of ship vibration noise control. The device comprises a wing-shaped structure trailing edge, a heat insulation layer, a heat preservation layer, a first electric heating piece, a first temperature sensor, a second temperature sensor, a second electric heating piece, a third temperature sensor, a fourth temperature sensor, a first outer covering porous medium, a second outer covering porous medium, a third outer covering porous medium, an electric heating piece controller and a first fixing bolt. A second fixing bolt, a third fixing bolt and a fourth fixing bolt. According to the characteristic that the control effect of wall surface heating and the porous medium is mainly influenced by viscosity, a combined control device of internal wall surface heating and outer coating of the porous medium is provided, and hydrodynamic noise generated by flow separation of the trailing edge of the airfoil structure can be remarkably reduced.

The invention relates to the technical field of nuclear power ocean engineering equipment, in particular to a multifunctional easily-recycled special alloy material for a floating nuclear power station. According to the technical scheme, the device comprises a first main body limiting plate in the horizontal direction, an integrally-formed second main body combination base is arranged on the left side of the first main body limiting plate, and the first main body limiting plate and the second main body combination base are both made of the same special alloy material; symmetrical installation avoiding matching grooves are formed in the front side and the rear side of the first main body limiting plate correspondingly, a first installation limiting groove penetrating through the whole in the vertical direction is formed in the position, close to the right side, of the upper end of the first main body limiting plate, and staggered installation avoiding grooves are formed in the upper end of the first main body limiting plate. The device has the advantages that the device can be matched with a dismounting tool for more convenient and safer dismounting, the situation that the dismounting difficulty is large due to seawater corrosion can be effectively avoided, and meanwhile, the dismounting operation between assemblies during maintenance can be more convenient.

The invention belongs to the technical field of ship body assembly, and particularly discloses a modular assembly type backhoe dredger and an assembly method.The modular assembly type backhoe dredger comprises a first ship body, a second ship body, a third ship body, a fourth ship body and a fifth ship body; the first ship body, the second ship body, the third ship body, the fourth ship body and the fifth ship body are connected in an assembled mode through a plurality of positioning parts to form an assembled ship body, a plurality of clamping grooves are formed in the top face of the assembled ship body, vertical pins are inserted into the clamping grooves, and side edges corresponding to the vertical pins are arranged on the inner side walls of the clamping grooves. Through cooperation of positioning pins and positioning plates, the first ship body, the second ship body, the third ship body, the fourth ship body and the fifth ship body are conveniently and preliminarily assembled and connected, second elastic pieces are matched to limit swing plates, rotating rollers are matched with sleeve plates through the swing plates, vertical pins are conveniently and vertically inserted into clamping grooves, and meanwhile the vertical pins are prevented from being pulled out of the clamping grooves; and the overall stability of the assembled ship body is ensured.

The utility model relates to the technical field of light ships, and provides a modular structure of an electric kail ship, which comprises a ship body, and an accelerator, a propeller assembly and a power supply which are arranged on the ship body, and is characterized in that a bottom plate of the ship body is provided with a connecting assembly mounting groove which is communicated up and down; the thruster assembly comprises a thruster and a connecting assembly, a signal line of the accelerator and a power line of the power source are in butt joint with a signal line and a power line of the thruster through connectors respectively, the thruster is directly or indirectly fixedly connected with the connecting assembly, and the connecting assembly is installed in the connecting assembly installation groove. According to the utility model, the defects in the prior art are overcome, the design is reasonable, the maintenance is convenient, and the technical problems that the propeller, the battery, the accelerator and the ship body of the Karting ship are fixed by adopting a soldering tin connecting wire welding mode and are sealed by sealant in the prior art, so that the follow-up disassembly and maintenance are difficult are solved.

The present invention provides a connection structure and a connection method for the outer hull plate and the deck of a ship. Among them, the connection structure includes a connection base, a deck body, an outer hull plate body, and at least one rib provided on the deck body; the connection base includes a base body and a card slot opened on the base body; the outer hull plate body is vertically adhesively bonded to the end face of the outer hull plate body, and the base body is adhesively bonded to the outer hull plate body; the rib on the deck body is accommodated in the card slot, and the outer periphery of the rib of the deck body is adhesively bonded to the inner peripheral wall of the card slot; through the direct adhesive bonding of the outer hull plate body and the deck body, the adhesive bonding of the base body and the outer hull plate body, and the adhesive bonding of the card slot of the base body and the rib on the deck body, the connection between the outer hull plate and the deck body can be realized only by the adhesive bonding method, improving the connection efficiency and meeting the non-destructive connection requirements.

The application discloses a kind of marine carbon fiber warp knits and its preparation method application, carbon fiber reinforced resin composite material, belong to carbon fiber composite material technical field, solve the problem of existing technology in the forming of ship large curved surface workpiece Fabric is easy to shrink, resin infiltration efficiency is low.The marine carbon fiber warp knits includes at least two carbon fiber yarn sheets, the carbon fiber yarn sheet is formed by carbon fiber yarn spread yarn flat cross section;At least two carbon fiber yarn sheets are stacked along the thickness direction, and the lay angle of adjacent carbon fiber yarn sheet constitutes asymmetric lay structure;The carbon fiber yarn sheet is stitched by warp knitting thread, and the stitching density of the warp knitting thread is 8-14 roots / inch.The marine carbon fiber warp knits can realize width variation <5mm, resin rapid and uniform infiltration, improve the forming quality and efficiency of ship large curved surface workpiece.

The invention relates to the field of ships, in particular to a right-angle bilge reinforcing structure suitable for a low-speed floating body and a construction method of the right-angle bilge reinforcing structure. The right-angle bilge reinforcing structure comprises a reinforcing piece and a supporting piece, a broadside plate and a bottom plate of a low-speed floating body are vertically arranged, the supporting piece is located on the side, away from the bottom plate, of the broadside plate, the supporting piece and the bottom plate are an integral flat plate, and the broadside plate is vertically welded to the integral flat plate and forms an inverted-T-shaped structure with the integral flat plate; the reinforcing piece is arranged between the broadside plate and the supporting piece, and the end, away from the joint of the broadside plate and the supporting piece, of the reinforcing piece is welded to the broadside plate and the supporting piece. The supporting piece extends outwards from the bottom plate of the floating body, so that the bilge forms an inverted-T-shaped structure, the broadside plate and the bottom plate are convenient to position and weld, the overall process is simple, meanwhile, the supporting piece and the broadside plate form a reinforcing area, the reinforcing piece is welded in the area, and the connecting strength of the right-angle bilge is greatly improved.

The invention relates to the technical field of submarine cable maintenance ships, and particularly discloses a submarine cable maintenance ship and an operation method thereof.The submarine cable maintenance ship is provided with a cable disc and a submarine cable maintenance device on a deck, the cable disc can selectively store submarine cables or stones, the deck is provided with a moon pool, and the stone throwing device comprises a lifting assembly and a stone throwing assembly; the lifting assembly is detachably installed in the moon pool, the riprap assembly comprises a plurality of riprap pipes connected end to end, the lifting assembly is used for driving the riprap pipes to ascend and descend, and when the cable tray stores the stones, the bucket machine is used for grabbing the stones in the cable tray to the riprap pipes. A cable disc is arranged to selectively store submarine cables or stones, a moon pool is arranged on a deck, a lifting assembly is installed on the moon pool, a stone throwing pipe of a stone throwing assembly is driven to ascend and descend through the lifting assembly, the stones in the cable disc are grabbed to the stone throwing pipe through a bucket machine, the stones are thrown to the seabed through the stone throwing pipe, and therefore the requirements for submarine cable overhauling and stone throwing operation are met; and the riprap precision of the deep operation water depth is improved, and stone waste is reduced.

The invention belongs to the technical field of ship and ocean engineering, and discloses a connecting structure, a fatigue design method of the connecting structure and a semi-submersible platform. The connecting structure comprises a panel and two external toggle plates, the two external toggle plates are arranged in parallel in a spaced mode in the length direction of the intersecting line, each external toggle plate is fixedly connected to a deck box and a stand column, the external toggle plates, the deck box and the stand column are perpendicular to one another, and one of the two external toggle plates is arranged at the end of the intersecting line; the panel is fixedly connected to the two external toggle plates, a closed space is defined by the panel, the deck box, the stand column and the two external toggle plates, and a reinforcing assembly is fixedly connected into the closed space. The panel, the deck box, the stand column and the two external toggle plates of the connecting structure define a closed space, the box-type multi-toggle-plate connecting structure is formed, stress concentration of key nodes of the semi-submersible platform is reduced, and the fatigue life is prolonged; the reinforcing assembly is arranged in the closed space, and the external structure is simple and attractive.

The present invention discloses a dedicated offshore operating platform for a rotary tubing pile driver. The platform comprises a hull with a matching recess for the pile driver at the stern of the hull. The rotary tubing pile driver and a slidable clamp mechanism for the rotary tubing at the bottom of the hull are mounted in the recess. The slidable clamp mechanism for the rotary tubing at the bottom of the hull is located below the rotary tubing pile driver. A crane is provided in the middle of the top deck of the hull. The dedicated offshore operating platform for the rotary tubing pile driver provided by the present invention enables the rotary tubing pile driver to perform rapid, unobstructed drilling and piling operations at sea under any geological conditions.

The application discloses a method for preparing Ti80 titanium alloy flat ingot based on an electron beam cold bed furnace and high return material melting and casting, uses Ti80 titanium alloy return material as raw material, uses VAR ingot cutting material as VAR compensation material, and optimizes the material distribution structure, so that the EB melting element burning loss is precisely controlled, the Ti80 titanium alloy flat ingot with qualified and controllable components is prepared by using a large proportion of Ti80 titanium alloy return material, the component unevenness problem under the high return material ratio is solved, and core technical support is provided for short process manufacturing of Ti80 plate.

A method for maintaining physical assets based on recommendations generated from operational data analysis and a composite model representing multiple models of the physical assets includes: constructing the composite model by a computing device using a port-reduced static condensed reduction primitive approximation with respect to at least a portion of a partial differential equation; the computing device analyzing error indices associated with at least one model within the composite model to determine if the error indices exceed a tolerance level, and accordingly increasing the number of basis functions in the port-reduced static condensed reduction primitive approximation; the computing device receiving first operational data associated with at least one region of the physical asset and updating the composite model; and the computing device providing recommendations for maintaining the physical asset based on the updated composite model.

The invention relates to the technical field of aquaculture, in particular to an automatic crayfish aquatic plant planting device which comprises a hull serving as a carrier and can automatically travel in a water area for crayfish cultivation. An adjusting platform capable of adjusting the position is arranged on the ship body; the storage mechanism comprises a storage assembly which is arranged on the ship body and used for storing aquatic plants to be thrown; the storage assembly is communicated with a transfer assembly for transferring aquatic plants; the putting mechanism comprises a trimming assembly and a putting assembly which are arranged on the adjusting platform, an outlet of the trimming assembly communicates with an inlet of the putting assembly, and an outlet of the transferring assembly can communicate with the trimming assembly; the trimming assembly trims the aquatic plants, the trimmed aquatic plants enter the putting assembly, the putting assembly sends the trimmed aquatic plants to the set depth underwater, and the aquatic plants are put. According to the automatic aquatic plant throwing device, automatic and accurate throwing of aquatic plants can be achieved, human input is greatly reduced, labor intensity is reduced, throwing efficiency is improved, throwing effect is improved, and overall breeding cost is reduced.

The utility model relates to the technical field of ship equipment, and aims to solve the technical problem that an angle steel platform is too heavy. And maintenance of pipelines and cables is inconvenient. In order to solve the technical problem, the utility model provides the ship floor lifting device. The device comprises a plurality of columns of supporting assemblies, a supporting piece of the supporting assembly comprises a fixed base and a middle telescopic piece. The fixed base is connected with a deck; the length of the middle telescopic piece is adjustable; the clamping keel is connected to the top of the middle telescopic piece; clamping steps are respectively formed on the upper surface and the two side surfaces of the clamping keel; the integrally-formed floor comprises a bottom supporting piece and a rubber floor connected to the top of the bottom supporting piece. Clamping grooves are formed in the two sides of the bottom of the bottom supporting piece; the two sides of the integrally-formed floor are erected on the clamping keels of the two adjacent supporting assemblies correspondingly, and the clamping grooves are matched with the clamping steps. According to the utility model, the weight is reduced, the integrated floor can be overhauled at any position, and the maintenance is more convenient.

The utility model belongs to the technical field of deepwater detection, and particularly relates to a liftable fin with a moon pool function, which comprises a moon pool bin, and further comprises a fin body, a positioning ring, a positioning sheet, a sliding rod, a connecting ring, a spring, a positioning seat, a positioning cone and a scientific investigation instrument which are arranged on one side of the moon pool bin, the fin plate body is fixedly installed on the inner surface of the base, the locating ring connected with the locating piece in an attached mode is further fixedly installed on the inner surface of the fin plate body, and the surface of the locating piece is further connected with the sliding rod in a sliding mode. According to the scientific investigation instrument placing device, the scientific investigation instrument can be placed more stably, the phenomenon that the body is affected by shaking is avoided, meanwhile, the body can be buffered through a sliding rod and a spring, and the damage situation can be effectively reduced.

This invention discloses a buoyancy device for a water surface cleaning robot. In the field of water surface cleaning equipment, existing designs use two half-molded parts produced by injection molding to form a floating chamber in order for the robot to float on the water. The half-molded parts are prone to deformation, and the injection mold cost is very high, with the total injection mold cost for the robot reaching millions of yuan. The robot body includes an upper shell, a floating chamber, and a support frame. One end of the support frame is connected to the floating chamber, and the other end is connected to the upper shell. The floating chamber includes at least a first floating chamber and a second floating chamber, which are composed of tubular materials. The beneficial effect is to solve the existing technology, simplify the floating chamber and robot mechanism, and reduce the injection mold cost to tens of thousands of yuan.

The utility model discloses a double-body foldable underwater explorer, which relates to the technical field of underwater operation auxiliary equipment and comprises a floating body component, a platform, an underwater operation cabin, a positionable connecting mechanism, a lifting adjusting mechanism and a control component. The underwater operation cabin is detachably connected with the floating body assembly through the positionable connecting mechanism, the underwater operation cabin can keep the underwater preset depth under the action of the positionable connecting mechanism, and the lifting adjusting mechanism is installed on the platform, connected with the underwater operation cabin in a matched mode and used for driving the underwater operation cabin to ascend and descend so as to switch the operation state and the navigation state. The control assembly is installed on the platform or the floating body assembly. The floating body assembly bearing platform is adopted and matched with the independent underwater operation cabin, underwater preset depth fixing of the operation cabin is achieved through the positionable connecting mechanism, safety and comfort are improved, and production and assembly difficulty and transportation and storage cost are greatly reduced by being detachably folded and matched with the portable wheel set.

The invention relates to an assembly for connection between a main hull and a supporting rod and a design method of the assembly, and belongs to the technical field of ocean engineering.The assembly comprises the supporting rod, the two ends of the supporting rod are provided with a top end square block and a bottom end square block respectively, and the supporting rod abuts against a stand column of the main hull through the top end square block; the supporting rods abut against the buoyancy tanks of the main ship body through the square blocks at the bottom ends. Wherein the connecting position of the end face of the top end of the top end square block and the stand column is fixed through an upper frame, the connecting position of the end face of the bottom end of the bottom end square block and the floating box is fixed through a lower frame, and the upper frame, the top end square block, the supporting rod, the bottom end square block and the lower frame are in geometric continuity in structure. Stress distribution can be effectively optimized, the fatigue life is prolonged, construction and manufacturing are facilitated, the cost is controllable, and the defect that an existing floating type draught fan supporting rod and buoyancy tank or stand column connecting structure is difficult to design is overcome.

The invention relates to the technical field of underwater operation of submersible vehicles, in particular to a portable underwater four-foot jacking mechanism and an application method thereof. The mechanism comprises a base fixedly connected to a submersible vehicle and four unfolding and folding type supporting leg structures of the same structure. Each unfolding and folding type supporting leg structure is sequentially connected with a spiral swing hydraulic cylinder, a supporting rod, a direct-acting hydraulic cylinder and a disc type supporting foot. The supporting legs are unfolded and folded through the spiral swing hydraulic cylinders, the supporting legs are close to the broadside of the submersible vehicle in the folded state so as to reduce the sailing resistance, energy is saved, and long-distance sailing of the submersible vehicle and mechanism carrying and transporting are facilitated; after unfolding, the height of the supporting feet is adjusted through the direct-acting hydraulic cylinders, the device can adapt to the uneven underwater environment, and the bottom sitting stability of the submersible vehicle is improved; and the disc type supporting feet can adapt to the sludge environment, and the whole device has the advantages of being portable, stable, high in environmental adaptability and the like.

The utility model belongs to the technical field of marine environment monitoring equipment, and provides an in-cabin sea well working table which comprises a sea well penetrating through an in-cabin deck and partially extending upwards, a fence table fixedly arranged on the in-cabin deck, and a table plate movably covering the fence table. The sea well is arranged in the cavity of the fence table, the top height of the sea well is not larger than that of the fence table, the top of the fence table is open, and the table plate is movably arranged at the top opening. According to the in-cabin sea well workbench, the safety and convenience of using of the in-cabin sea well are improved, meanwhile, the utilization rate of the space in a cabin is increased, and in-cabin experiment detection can be conducted efficiently and orderly.

The utility model provides an underwater robot capable of being used for bridge detection, which belongs to the technical field of underwater robots and comprises a top layer plate, an interlayer plate, a bottom layer plate, a left side plate, a right side plate, a multi-beam imaging sonar, a laser range finder, an electronic sealing buoyancy providing cabin, a water link DVL and a sonar altimeter. The left side plate and the right side plate are partially hollowed out in appearance and are divided into a combined frame type structure, the side face of the robot utilizes the stability of triangles, a plurality of triangular hollows are adopted, and it is guaranteed that the robot keeps stable under strong water flow impact; the electronic sealing buoyancy providing cabin is arranged, the electronic sealing buoyancy providing cabin serves as a waterproof device for protecting the circuit board and also serves as a buoyancy device to replace a traditional buoyancy device, and the operation resistance of the robot in water can be effectively reduced in combination with the semicircular spherical cover.

A side wall structure of a dredger pumping channel belongs to the technical field of trailing suction dredgers and comprises two symmetrically arranged dredger coamings, a dredger deck located below a main deck is arranged at the top ends of the dredger coamings, and a dredger bottom plate is arranged at the bottom ends of the dredger coamings. An inclined cabin wall is arranged between the inner side of each mud cabin coaming and the top side of the mud cabin bottom plate, a mud door is arranged at the position of the mud cabin bottom plate and connected with a cabin pumping channel, the cabin pumping channel is connected with mud discharging equipment, a cleaning opening is formed in the outer side of the cabin wall, and a sealing door capable of being opened and closed up and down is arranged at the cleaning opening. A water spraying pipe corresponding to the cleaning opening is arranged on the inner side of the cabin wall through a supporting piece, and a water spraying opening communicated with the cleaning opening is formed in the position, corresponding to the cleaning opening, of the water spraying pipe. The side wall structure of the mud cabin pumping channel is reasonable in design, simple in structure, convenient to use and capable of preventing foreign matter from being clamped and accumulated and avoiding mud leakage of a mud door, maintenance cost can be saved, and construction efficiency can be improved.