72 results about "Underwater welding" patented technology

The invention provides an underwater welding robot which comprises two clamping mechanisms arranged in a spaced mode. The adjusting mechanisms are used for adjusting the distance between the two adjusting mechanisms; the water retaining mechanism is used for moving the annular water retaining cavity to a welding position so as to reduce the influence of water flow on welding equipment; and a vision controller. According to the underwater welding robot, the two clamping mechanisms are arranged, one clamping mechanism can be clamped on a pipeline needing to be connected and convey the pipeline to the water along with the pipeline, and the other clamping mechanism is clamped on the underwater pipeline after conveying the pipeline to the water along with the pipeline; the adjusting mechanism is arranged, so that the distance between the two clamping mechanisms can be adjusted; a water retaining mechanism is arranged, so that an annular water retaining cavity can be moved to a welding position to reduce the influence of water flow on welding equipment; and the visual controller is arranged, the pipeline connecting position can be determined underwater, the influence of water flow on welding is avoided through the water retaining mechanism, and the welding precision is high, adaptability is good, and practicability is good.

The invention discloses a ship underwater welding seam quality detection device, and relates to the technical field of ship welding seam detection, the ship underwater welding seam quality detection device comprises a detector, a gooseneck pipe, a pipe body limiting assembly, an end part frame, a clamping and fixing assembly and a detection unit, the top end of the detector is provided with a receiving end, and the detection unit is fixed below the end part frame. Comprising a camera body, an illumination lamp and a protective shell. The camera body is fixed below the gooseneck, and a transmitting end is arranged at the top of the camera body; the illumination lamp is fixed on the camera body; the protective shell is of a hollow capsule structure and is fixed on the outer side of the camera body, the protective shell is made of a transparent silica gel material and is communicated with an external air pump through a pipeline, and the camera body is protected through inflation expansion and contraction; the technical effects that the detection range is expanded, the equipment damage risk is reduced, the detection efficiency is improved, and the detection accuracy is improved can be achieved.

The invention relates to the technical field of welding, and discloses a multi-layer multi-weld joint re-arcing welding method, which comprises the following steps of: determining an arcing parameter according to a welding position, keeping a first included angle between a welding wire and a welding direction before arcing, and forming an arc crater; when arcing is conducted again, the position, 0.1 mm-20 mm away from the outer arc edge of the arc crater, around the arc crater serves as an arcing point, and normal welding is conducted after a molten pool is fused and crosses the arc crater, the point, 0.1 mm-20 mm away from the outer arc edge of the arc crater, of the arc crater serves as the arcing point, due to the natural shrinkage effect when the molten pool is solidified, welding slag and oxide are extruded to the bottom of the arc crater, and therefore the arc crater is welded normally. The bare metal exposure rate can reach more than 95%, a welding slag coverage area with poor conductivity is effectively avoided, and the arc stability is greatly improved; the retention time of a molten pool is prolonged, gas escape is promoted, pore defects are reduced, and the molten drop size qualification rate is increased; the method does not need mechanical polishing pretreatment, can be directly applied to complex scenes such as laser arc hybrid welding, limited space and underwater welding, greatly reduces the repair rate, and shortens the construction period of an engineering project.

The invention relates to the technical field of equipment corrosion prevention, and discloses a life self-sensing sacrificial anode and cathode protection device which comprises a protection execution unit, a data acquisition unit and a remote sensing unit. Wherein the protection execution unit comprises an anode block, a conductive connecting piece and an adsorption device, one end of the conductive connecting piece is embedded into the anode block, the other end of the conductive connecting piece is fixed with the adsorption device, and the adsorption device is detachably connected with the protected steel structure. A working electrode of an electric quantity metering device of the data acquisition unit is electrically connected with the conductive connecting piece, and a counter electrode is electrically connected with the steel structure in the adsorption device combination area. And the remote sensing unit is in signal connection with the data acquisition unit and is used for receiving the acquired current data. According to the invention, remote real-time monitoring of cathode protection current is realized, the defect that the state of a traditional anode is unknown is overcome, and predictive maintenance is facilitated; meanwhile, the adsorption type detachable structure does not need underwater welding, the installation and replacement process is greatly simplified, and the engineering applicability and the maintenance efficiency are improved.

The invention belongs to the technical field of underwater welding, and discloses an underwater double-path ultrasonic synergistic laser-electric arc hybrid welding repair device and method. The device comprises a two-way ultrasonic synergistic TIG welding gun and a laser head which are both fixed on an external drainage cover, and sealing penetration pieces are arranged on the external drainage cover for the two-way ultrasonic synergistic TIG welding gun and the laser head; the double-path ultrasonic synergistic TIG welding gun comprises a tungsten electrode sound path and an end part sound path; the tungsten electrode sound path transmits ultrasonic energy to a welding gun tungsten electrode through a tungsten electrode ultrasonic transducer, the electric field at the root of the welding gun tungsten electrode and the micro-motion behavior of the welding gun tungsten electrode are affected, and therefore the electric arc is compressed, and the position of the root of the electric arc is finely adjusted. The end sound path acts on the end of the welding gun through the end ultrasonic transducers in an annular array, directional sound radiation pressure is applied, an electric arc column and the surface of a molten pool are adjusted, heat input is promoted to be evenly distributed, and the symmetry of the molten pool is improved. The welding quality and the process stability are remarkably improved.

The invention provides an underwater welding device and welding equipment. A first channel is formed in a first rod piece; the second rod piece is connected with the first rod piece; a second channel is formed in the second rod piece and communicates with the first channel; the welding assembly is arranged at the end, away from the first rod piece, of the second rod piece and used for welding a to-be-welded area. The laser optical fiber is arranged on the first rod piece and used for outputting laser to the first channel, and the laser is used for being output to the welding assembly through the first channel and the second channel; the shielding gas pipeline is arranged in the first channel and the second channel in a penetrating mode and extends in the axial direction of the first channel and the axial direction of the second channel so as to be used for outputting shielding gas to the welding assembly, and the shielding gas is used for forming a dry operation environment in the to-be-welded area during underwater operation; and the length directions of the first rod piece and the second rod piece are different, so that the operation flexibility and the space adaptability of the underwater welding device in the underwater narrow and complex environment are improved.

The invention belongs to the technical field of underwater welding, and particularly relates to pipeline joint welding equipment which comprises a base, the top end of the base is fixedly connected with a welding assembly, the outer side of the welding assembly is sleeved with an anti-vortex cover, the side wall of the anti-vortex cover is provided with an air inlet pipe, and the top end of the welding assembly is in transmission connection with a first waterproof motor. A clamping seat is arranged on one side of the first waterproof motor; clamping assemblies are arranged on one side of the base and one side of the clamping base. Pipeline cleaning and welding fixing requirements are considered through the two-stage type clamping assembly, pipe wall attachments are removed in advance in cooperation with the pipeline cleaning assembly, then a dry type welding environment is constructed through cooperation of the anti-vortex cover and the inflation sealing structure, and precise welding is achieved in cooperation with the surrounding type welding assembly; the problems that underwater welding water flow interference is large, clamping is not stable, sealing fails, and the welding seam quality is poor are effectively solved, and the underwater pipeline connector welding device is suitable for efficient and stable welding operation of underwater pipeline connectors.

The utility model relates to a pressure reducing valve device with a waterproof function, which comprises a valve body, an oxygen bottle connector is arranged at the opening end of the valve body, a connecting part is arranged between the oxygen bottle connector and the valve body, and the valve body and the oxygen bottle connector are fixedly connected through the connecting part. When the pressure of oxygen in an external oxygen bottle is reduced, the pressure in the oxygen bottle connector is reduced, at the moment, the spring pushes the valve element to move towards the oxygen bottle connector, the bottom end of the air hole is driven to move synchronously, and when the bottom end of the air hole moves to be communicated with the alarm pipeline, the water-proof sealing structure is closed. Therefore, gas can be discharged into the alarm pipeline through the air hole, penetrates through the one-way valve and then is discharged from the bottom end of the alarm pipeline, bubbles are formed underwater, a user is reminded of insufficient oxygen pressure, and the problem that the underwater welding quality can be seriously affected due to the fact that the oxygen pressure is insufficient and a welding rod cannot be fully combusted is avoided as much as possible.

The invention provides a fastener anti-loosing system and method for a reactor internal comprehensive flow-induced vibration test, the system comprises a stud, an anti-loosing cup and a locking nut, the stud comprises a screw head and a threaded column, one end of the screw head deviating from the threaded column is connected with a first plate body, the threaded column is arranged in a matching hole of a second plate body in a penetrating manner, and the locking cup is connected with the locking nut. A placing groove communicated with the matching hole is formed in the second plate body above the matching hole, and the circumferential size of the placing groove is larger than that of the matching hole; the anti-loosening cup sleeves the outer side of the threaded column and is arranged in the placing groove; the locking nut is arranged on the outer side of the threaded column in a sleeving mode and is in threaded fit with the threaded column, and the locking nut is located in the anti-loosening cup; the locking nut or the second plate body is provided with at least two clamping grooves in the top of the containing groove, and the top of the anti-loosening cup is pressed to the clamping grooves so as to be fixedly connected with the locking nut or the second plate body. According to the anti-loosening system, underwater welding can be avoided, and the underwater installation convenience is improved on the premise that the anti-loosening effect is considered.

The utility model relates to the technical field of underwater welding, in particular to a ship underwater welding robot which comprises a robot body, a sealing box is fixed at the rear end of the robot body, an air box is fixed in the robot body, an air pipe is fixed at the rear end of the air box, and an attaching rod is arranged in the robot body. A supporting disc is fixed to the rear end of the attaching rod, a moving rod is arranged at the rear end of the supporting disc, a positioning plate is fixed to the rear end of the moving rod, a laser welding machine is fixed to the rear end of the positioning plate, a welding wire positioning disc is arranged at the left end of the laser welding machine, a water outlet pipe is arranged at the bottom of the sealing box, and a plurality of positioning rods are further arranged outside the robot body. An electromagnet is arranged at the rear end of each positioning rod; a place is provided for welding of the laser welding machine through the sealing box, the sealing ring can guarantee that the whole robot is tightly attached to the position needing to be welded, and therefore it is guaranteed that the interior of the sealing box is dry, and the welding effect is guaranteed.

The application discloses an underwater magnetic field coupling magnetostrictive backfill type friction spot welding device, which comprises a stirring needle, a compression ring, welding material, a compression ring chuck, a top end clamp, a top rod, a cap, an electromagnetic transducer, a magnetic conducting ring, a fixed connecting rod and a water tank; the top end clamp is fixed on the compression ring chuck and cooperates with the internal top rod to fix the welding material at the bottom end of the electric spindle; the fixed connecting rod is sequentially sleeved with the electromagnetic transducer and the cap, and the three are concentrically matched and located at the bottom of the welding point center; the magnetic field energy is converted into electric energy and mechanical energy to the welding point through the electromagnetic transducer. The stirring needle is opposite to the surface of the welding material; the welding material is submerged in the pool of the water tank, and the pool water flow in the water tank is adjusted according to the temperature change; the electronic converter is added at the bottom to improve the temperature distribution of the welding point and the material flow; the underwater welding reduces the heat input and the heat affected zone structure area, and ensures the effective implementation of electromagnetic induction.

This utility model relates to the field of laser welding technology and proposes an underwater welding laser head, including a stainless steel tube cover; a connecting plate fixedly connected to the inner wall of the stainless steel tube cover, one end of which is fixedly connected to the end of the laser welding head; a spray disc fixedly connected to the lower end of the inner wall of the stainless steel tube cover, with spray holes at equal angles at the bottom of the spray disc; a connecting pipe extending to the outside of the stainless steel tube cover fixedly connected to one side of the top of the spray disc, with the bottom end of the connecting pipe communicating with the interior of the spray disc; and a protective cover movably connected to the bottom of the stainless steel tube cover, with fixing components at the top of the protective cover and the bottom of the stainless steel tube cover. Through the spray disc, connecting pipe, and spray holes, an umbrella-shaped protective gas curtain can be sprayed out, ensuring that a small area below the end of the laser welding head is free of water, facilitating welding operations. At the same time, high-pressure gas blows away welding fumes, ensuring smooth welding.

The invention discloses an underwater dry type welding device and an underwater robot, and relates to the technical field of underwater welding. The underwater dry type welding device comprises a housing, a welding assembly and a water draining and gas supplying assembly. A containing cavity is formed in the housing, and one end of the housing is provided with a butt joint opening communicated with the containing cavity and used for being in butt joint with a to-be-welded workpiece. The welding assembly comprises a welding piece and a driving piece, and the driving piece is installed on the housing, is in transmission connection with the welding piece and can drive the welding piece to move in the containing cavity to conduct welding. The water drainage and gas supply assembly comprises a water drainage part and a gas supply part which are both communicated with the containing cavity and control introduction and discharge of water in the cavity and introduction and discharge of protective gas respectively. A closed space for isolating an external water body is defined by the housing and the workpiece, a stable and water-free dry type welding environment is constructed through the water drainage and gas supply assembly, welding automation is achieved through the driving part, the water body is prevented from making contact with a welding arc and a welding pool, the defects of water quenching, hydrogen-induced cracks and the like are reduced, and the operation stability and the welding seam quality of underwater welding are improved.

The application discloses a ship underwater welding seam quality detection device, and relates to the technical field of ship welding seam detection.The device comprises a detector, a gooseneck pipe, a pipe body limiting assembly, an end portion frame, a clamping and fixing assembly and a detection unit.The top end of the detector is provided with a receiving end.The detection unit is fixed below the end portion frame and comprises a camera body, an illuminating lamp and a protective shell.The top of the camera body is provided with a transmitting end and is fixed below the gooseneck pipe.The illuminating lamp is fixed on the camera body.The protective shell is a hollow capsule structure and is fixed outside the camera body.The protective shell is made of transparent silica gel material, is communicated with an external air pump through a pipeline, and protects the camera body through inflation and contraction.The device can realize the technical effects of expanding the detection range, reducing the damage risk of the equipment, improving the detection efficiency and improving the detection accuracy.

The invention relates to the technical field of underwater welding, and provides an underwater oxyacetylene flame preheating integrated welding gun device which solves the technical problems that a preheating device of existing underwater welding equipment is difficult to carry out effective preheating, the operation is tedious in the using process, the simplicity and the convenience are poor, and the using flexibility is poor, the underwater oxyacetylene flame preheating integrated welding gun device comprises a shell, an end cover, a wire feeding welding gun and an oxyacetylene flame gun, the wire feeding welding gun and the oxyacetylene flame gun are connected with the shell and are arranged in parallel, the nozzle and the gun head are arranged adjacently, the oxyacetylene flame gun outputs flames to achieve preheating, and preheating and welding are continuously connected in a space adjacent area. According to the underwater welding device, the welding seam quality, the welding efficiency and the stability can be guaranteed, the underwater welding device is suitable for various underwater operation environments, and reliable welding performance can be provided no matter in a deep sea, a high-pressure water area or a special underwater maintenance environment.

The application discloses an underwater solid-phase additive manufacturing device, which comprises a coaxial underwater dry area mechanism, a shell and an underwater welding torch mechanism. The shell is arranged above the underwater dry area mechanism. The upper half of the underwater welding torch mechanism is arranged in the shell, and the lower half of the underwater welding torch mechanism is arranged in the underwater dry area mechanism. The underwater dry area mechanism can create a local dry area in an underwater environment, the underwater welding torch mechanism can rotate at a high speed, heat is generated through friction to realize underwater solid-phase additive manufacturing, and the underwater welding torch itself is cooled by using the water environment. The application can efficiently carry out solid-phase additive manufacturing in the underwater environment. The application is based on the creation of a local dry area in the underwater environment, and the problems of low deposition efficiency and poor flowability of the deposited layer caused by the too fast heat dissipation of the welding torch and the deposited layer due to the water environment are avoided. The application is also based on active temperature measurement and the water of the external environment to regulate the temperature of the welding torch, and realizes continuous and stable solid-phase additive manufacturing in the underwater environment.

The utility model relates to the technical field of underwater welding equipment, in particular to a miniature drainage cover suitable for multi-scene application, which comprises a drainage cover base body, a welding torch swing mechanism, a water retaining mechanism and a plurality of air inlet pipes. The water retaining mechanism is installed on the lower side of the drainage cover base body through a plurality of screws, the water retaining mechanism and the drainage cover base body form a closed space, the welding torch is installed on the welding torch swing mechanism and penetrates into the closed space, the welding torch swing mechanism can be driven to swing around the swing center when the welding torch swings, and the water retaining mechanism can be compressed and folded. The water retaining device can be applied to different welding scenes such as underwater flat welding, underwater fillet welding and underwater curved surface welding, the water retaining cover does not need to be replaced when the application scene is replaced, time and labor are saved, deformation is adjusted through the compressible and foldable water retaining mechanism, multi-scene welding is achieved, the overall structure is simple, and economical and practical effects are achieved.

The utility model relates to the technical field of water level gauge installation, in particular to a large underwater structure water level gauge installation device which comprises a base, a balancing weight is fixedly arranged in the center of the interior of the base, an installation frame is fixedly arranged at the upper end of the base through bolts, and a first fixing limiting ring and a second fixing limiting ring are fixedly arranged on the two sides of the installation frame respectively. An elastic mechanism is fixedly arranged on the inner side of the second fixed limiting ring, a movable limiting ring is installed on the surface of the elastic mechanism, and a bubble water level gauge is arranged on the inner side of the movable limiting ring and the inner side of the first fixed limiting ring in a sleeving mode and is installed by adopting the structure that the elastic mechanism is matched with the first fixed limiting ring and the second fixed limiting ring. The installation can be completed only by pressing the movable limiting ring to enable the elastic mechanism to contract, placing the water level gauge and then loosening the water level gauge, complex underwater welding, bolt fixing and other operations are not needed, the installation time is greatly shortened, and the installation efficiency is improved.

The modular multifunctional operation platform comprises a stable clamping platform and an assembling platform, a water jet control module is fixedly installed on the upper surface of the assembling platform, and an underwater welding control module is fixedly installed on the upper surface of the assembling platform; a clamping control and controller module is fixedly installed on the upper surface of the stable clamping platform, and a fixing mechanism is arranged at the joint of every two adjacent platforms. Various operation devices can be replaced and carried at will according to different environments and unexploded ammunition states, each assembly platform can serve as a module to work independently and is not limited by the single function of an execution device, the assembly is assisted to be grabbed, the unexploded ammunition is clamped in the operation process, the position relation between the unexploded ammunition and the robot is more stable, and the working efficiency is improved. And various explosive ordnance disposal tasks can be accurately and efficiently completed.

The application provides a normal-pressure local dry-method welding drainage device, relates to the technical field of underwater welding equipment technology, and solves the technical problem that in the prior art, a large amount of welding smoke accumulates in a drainage cover during a long-time underwater laser welding process, and cannot be discharged in time, in a large amount and effectively. The device comprises a drainage cover, a welding component, a smoke discharging component and a sealing component. The smoke discharging component comprises an air suction pump and an air suction grid. The air suction pump is fixedly connected to the drainage cover, the air suction end of the air suction pump is communicated with a containing cavity, and the air suction grid is fixedly connected to the inner wall of the drainage cover. The air suction pump and the air suction grid are matched to suck the smoke generated by welding in the drainage cover. The air suction grid can suck the welding smoke and plasma gas at the back according to the flow trend of the smoke, so that the problem that a large amount of welding smoke accumulates in the drainage cover during a long-time underwater laser welding process and cannot be discharged in time, in a large amount and effectively is solved.

The invention belongs to the technical field of bridge construction, and particularly relates to a deepwater large-span cable-stayed bridge composite construction method. The method comprises the following steps: firstly, scanning a riverbed through a multi-beam depth finder to generate a three-dimensional geologic model, inputting a tide load spectrum and material mechanics parameters on a BIM platform, simulating open caisson structure deformation and marking a fault zone risk area; after the steel open caisson is prefabricated section by section, a pressure-resistant sealing magnetic levitation module and a hydraulic jack are integrated on the outer wall of the open caisson, a three-dimensional laser scanner is installed on the top, and a dual-mode deviation rectifying system is formed through a water pressure sealing test; during sinking, laser-sonar-inertial navigation multi-source fusion positioning is adopted, the sinking speed is controlled, and collaborative deviation adjustment is achieved through high-frequency fine adjustment of a magnetic levitation module and anchoring deviation correction of a hydraulic jack; a multi-degree-of-freedom mechanical arm is matched with an inert gas local drying cabin, and photoelectric positioning layering is combined to complete welding of the steel jacket box; self-compacting concrete is poured on the bearing platform, temperature is controlled in a zoned mode through pre-buried circulating water pipes and electromagnetic induction heating, and the temperature gradient is monitored in real time through optical fiber sensors; and the problems of structural displacement, welding deformation and concrete temperature overrun are corrected in real time through the sensor network in the whole cycle. The problems of open caisson deflection control, underwater welding sealing failure and mass concrete crack in the deepwater environment are solved, and the construction precision and the structural safety are remarkably improved.

The utility model relates to the technical field of underwater welding, and discloses a telescopic insulating operation arm for underwater welding, which comprises a main base, the top of the main base is fixedly connected with a square waterproof block, and the top of the square waterproof block is fixedly connected with an adjustable operation arm mechanism. The outer portion of the adjustable operation arm structure is fixedly connected with an anti-creeping mechanism, the inner portion of the adjustable operation arm structure is fixedly connected with a telescopic adjusting mechanism, and the top of the adjustable operation arm mechanism is fixedly connected with a welding clamping mechanism. According to the underwater welding device, the telescopic push rod is started to push the telescopic arm to slide, so that the device can adapt to welding of different distances, meanwhile, when the underwater welding device works underwater, the device completes protection on the working angle adjusting motor and the working position adjusting motor with the help of the first waterproof block and the second waterproof block, and therefore the risk of accidents caused by underwater electric leakage is reduced.

The present application relates to human-computer interaction underwater pipeline inspection welding ROV, system and tracking method, belong to underwater robot technical field. Solve the problem of greater difficulty in underwater environment to complete the underwater pipeline welding task. Including buoyancy material, vertical propeller, welding mechanical arm, welding high-definition camera, underwater welding gun, frame, forward high-definition camera, slide table, downward high-definition camera, horizontal propeller and mechanical arm, the frame is installed on both sides of buoyancy material, the frame is installed on the front side of forward high-definition camera, downward high-definition camera, slide table, mechanical arm, the slide table is installed on welding mechanical arm, the underwater welding gun is installed on welding mechanical arm, the welding high-definition camera is installed on underwater welding gun, the frame is installed with vertical propeller, horizontal propeller. Break the traditional artificial method's working depth, working time, welding technical level and other factors's limitation, protect personnel life health safety, improve underwater welding quality, reduce operation difficulty, reduce production cost.

The utility model relates to the technical field of underwater welding equipment, in particular to a multi-direction air inlet underwater welding miniature drainage cover which comprises a drainage cover base body, a welding gun installation mechanism, a water retaining mechanism and a plurality of ball head air inlet mechanisms, the water retaining mechanism is detachably arranged on the lower side of the drainage cover base body, and a closed space is formed by the water retaining mechanism and the drainage cover base body. The welding gun installation mechanism is detachably installed in the closed space, one ends of the multiple ball head air inlet mechanisms are rotatably installed on the lower side of the interior of the drainage cover base body, and the other ends of the multiple ball head air inlet mechanisms penetrate out of the drainage cover base body. The gas inlet modes are diversified, gas is fed in different directions of the top, the tangential direction and the radial direction, multidirectional gas feeding is achieved by adjusting the posture of the ball head gas inlet mechanism, rapid water drainage can be achieved while the problems that a water drainage cover is not high in applicability and the gas inlet modes are fixed are solved, and the water drainage device is suitable for various welding guns and wide in application range.

The present invention relates to the technical field of underwater welding robots, and in particular to a human-machine collaborative control system for an underwater welding robot in limited waters, comprising: a dropping setting unit for determining the number of dropping points according to a weld evaluation value and determining a dropping point setting method according to an ocean current influence value; a route generating unit for determining a route generating method according to a judgment condition; a processing and judging unit for determining a processing method according to a judgment condition; a dropping optimization unit for determining a dropping point optimization method according to a dropping influence value; a route optimizing unit for optimizing a moving route when a conflict evaluation value is greater than or equal to a preset conflict evaluation value and determining a route optimization method according to a range obstacle reference value; and an information transmission unit for determining an information transmission method according to a transmission condition. The present invention can improve the use efficiency of the underwater welding robot.

The invention discloses a floating type draught fan foundation with impressed current protection and a design method, the floating type draught fan foundation comprises a plurality of stand columns and floating boxes, and the stand columns are fixedly installed on the floating boxes; the system further comprises an impressed current system, the impressed current system comprises a plurality of auxiliary anodes and reference electrodes, and the auxiliary anodes and the reference electrodes are installed on the outer wall of the fan foundation. The power supply device is installed on one of the stand columns, the positive electrode of the power supply device is electrically connected with the auxiliary anodes through cables, the negative electrode of the power supply device is electrically connected with the fan base, and the reference electrode is electrically connected with the power supply device through a cable. The problems that consumption is too fast, underwater supplementary welding installation is needed in the operation and maintenance period and the like due to sacrificial anode corrosion prevention can be solved, and effective corrosion prevention protection of the floating type draught fan foundation in the whole life cycle is achieved.

The invention provides a pile replacing and splicing device, and belongs to the technical field of seabed pile driving engineering, the pile replacing and splicing device comprises an external connecting mechanism and an internal butt joint mechanism, the external connecting mechanism comprises a first lug plate and a second lug plate, the first lug plate is arranged on a pile replacing pile, and the second lug plate is arranged on an engineering pile; a connecting mechanism is detachably connected between the first lug plate and the second lug plate, the internal butt joint mechanism comprises a first connector, a butt joint ring and a second connector, in the connected state, the first connector is located in the pile replacement pile, the second connector is located in the engineering pile, and the two sides of the butt joint ring abut against the end of the pile replacement pile and the end of the engineering pile correspondingly. By arranging the internal butt joint mechanism and the external connecting mechanism, the replacement pile and the engineering pile can be stably connected together, welding and cutting are not needed, cost increase and safety risks caused by underwater welding and cutting are avoided, and the device is simple and stable in structure, convenient and fast to manufacture, high in field use efficiency and high in applicability to the sizes of a pile hammer and a steel pile.

The utility model relates to the technical field of ship and ocean engineering construction and repair, in particular to an underwater closure and underwater welding channel lateral sealing structure used in the floating body segmented construction process of ships, ocean engineering and the like, the lateral sealing structure is connected with an underwater welding channel for sealing, a dock broadside is used, an adjusting structure and a spiral lead screw are used for adjusting, and the underwater closure and underwater welding channel lateral sealing structure is formed. Therefore, sealing of the underwater welding channel in the transverse direction, the lateral direction and the bottom direction is achieved, and the underwater sealing effect is greatly improved. The lateral sealing structure is used for sealing in the transverse direction, the lateral direction and the vertical direction through a longitudinal wall sealing rubber strip, a lateral sealing rubber strip and a bottom sealing rubber strip, so that the beneficial effects that the repair construction capacity of ship and ocean engineering construction is improved; the segmented stability of the floating body is improved, and the underwater construction safety is guaranteed; the lateral sealing structure is tightly attached to the side face (broadside) of the floating body structure; cost is low, production and construction are convenient, and efficiency is improved.

The invention relates to a welding process for computer cabinets with rapid heat conduction and heat dissipation to prevent deformation, comprising the following steps: a liquid storage chamber (2) is set up, the size of which is defined as the size after assembly of the base, top cover, frame, and components (1) to be welded, and the liquid storage chamber contains a working fluid (3); an underwater welding device (4) is provided, the underwater welding device (4) having a welding head (41) that can extend to the liquid storage chamber (2) to perform the welding process at a predetermined distance (L) below the liquid surface of the working fluid (3); a welding fixture (5) is provided to temporarily fix the components (1) to be welded and then insert them into the liquid storage chamber (2);The welding head (41) of the underwater welding apparatus (4) penetrates the working fluid (3) to assemble the components (1) to be welded; and the welding device (5) cools down in the working fluid (3) together with the welded components (1) and they are then removed from the working fluid. Since the heat generated during the welding process is dissipated quickly, deformations are avoided and the quality of the final product is significantly improved.

The application provides a pile-replacing and splicing device, and belongs to the technical field of submarine piling engineering. The device comprises an external connecting mechanism and an internal splicing mechanism. The external connecting mechanism comprises a first ear plate and a second ear plate. The first ear plate is arranged on a replacement pile, and the second ear plate is arranged on an engineering pile. A connecting mechanism is detachably connected between the first ear plate and the second ear plate. The internal splicing mechanism comprises a first joint, a splicing ring and a second joint. In a connected state, the first joint is located inside the replacement pile, the second joint is located inside the engineering pile, and the two sides of the splicing ring abut against the end of the replacement pile and the end of the engineering pile, respectively. The internal splicing mechanism and the external connecting mechanism can stably connect the replacement pile and the engineering pile together without welding and cutting, thereby avoiding the cost increase and safety risks caused by underwater welding and cutting. The device has a simple and stable structure, is convenient to manufacture, has high efficiency in field use, and is suitable for pile hammers and steel piles of various sizes.