570 results about "Submarine pipeline" patented technology

The invention belongs to the field of submarine routing planning, particularly relates to a pipeline routing line selection method and system based on a path planning algorithm and analytic hierarchy process, and aims to improve the routing line selection efficiency and precision and reduce the routing risk in the pipeline routing line selection process. The method comprises the following steps: establishing an evaluation sample matrix X based on measured value data of evaluation indexes, and converting pixel points of a target sea area topographic map into nodes of a two-dimensional matrix to obtain a grid obstacle map; establishing a submarine pipeline routing risk quantitative evaluation model; converting the sea area topographic map into a risk level grey-scale map through the risk quantitative evaluation model of the submarine pipeline; and carrying out route planning through a route planning algorithm based on the grid obstacle map, and finding a route with the minimum accumulated gray value in the target sea area risk level gray-scale map through a greedy algorithm to serve as a final route. According to the method, risk parameters are taken into consideration for the generated path, and finally, the obtained route is a routing path with small length and low overall risk.

The invention discloses a submarine scoured pipeline stability early warning method based on artificial intelligence, and relates to the technical field of submarine pipeline protection, and the method comprises the steps: collecting and sorting submarine pipeline historical reconnaissance data and monitoring data of a target region; and constructing a seabed-submarine pipeline local fine three-dimensional hydrodynamic-sediment numerical model on the basis of a solution Navier-Stokes equation and a sediment transportation model. According to the method, the historical reconnaissance data, the monitoring data and the numerical model result are integrated, the coupling effect of various factors can be comprehensively considered, then the dynamic characteristics of seabed scouring are more comprehensively captured, key scouring factors influencing the stability of the pipeline are more accurately recognized, and meanwhile, the scouring process and result simulated by the numerical model are combined, so that the stability of the pipeline is improved. According to the method, the stress distribution and deformation conditions of the pipeline under different scour depths can be analyzed more accurately, then an early warning signal is sent out in advance, the risk that the pipeline is damaged due to scour is effectively reduced, and the reliability and accuracy of early warning are improved.

The invention discloses a submarine pipeline stability discrimination method based on submarine scour mechanism analysis, and relates to the technical field of submarine facility protection, basic data of a target sea area are obtained, and the basic data comprise geological information of an area where a submarine pipeline is located, hydrological information of a sea area near the pipeline and pipeline information; performing feature analysis on the basic data of the target sea area, and extracting feature data related to water flow scouring, wave scouring and soil particle movement; according to the method, the risk area which is easily influenced by scouring around the pipeline is accurately identified through seabed scouring mechanism analysis, and then key monitoring and early warning are performed on the risk area, so that protection measures are strengthened in a targeted manner, and the influence of scouring on the stability of the pipeline is dynamically evaluated through continuous monitoring and analysis; the problems of pipeline deformation and stress concentration caused by scouring can be found in time, a maintenance strategy is adjusted according to the problems, the pertinence of safety protection is improved, resources can be effectively saved, and the maintenance cost is reduced.

The invention discloses a submarine pipeline state early warning method and system based on scour-vibration coupling sensing, and the method comprises the steps: obtaining the historical marine environment information of a target submarine pipeline region, laying a monitoring sensor array according to the historical marine environment information, collecting multi-source monitoring data, and carrying out the preprocessing of the multi-source monitoring data, thereby forming a multi-source monitoring data set. And constructing a multi-physical field coupling analysis model, inputting the data set into the model to analyze the response condition of the pipeline in the current seabed environment, and obtaining pipeline response simulation information. And analyzing resonance influence caused by environmental scouring in different sections, generating resonance derivative characteristics, and constructing pipeline multi-modal fusion characteristics in combination with monitoring data. Predicting the future response state of the pipeline through the submarine pipeline state analysis model, and carrying out risk early warning prompt; meanwhile, the fatigue life of each section is analyzed based on resonance derivative characteristics, fatigue-prone sections are identified, and maintenance suggestions are generated and pushed. Therefore, the accuracy and timeliness of sensing the state of the submarine pipeline are improved, and the early warning intelligence of the submarine pipeline is effectively improved.

The invention relates to the technical field of ocean exploration, in particular to a non-buried submarine pipeline identification method and system based on multi-beam point clouds, and the method comprises the steps: obtaining three-dimensional point cloud data of a submarine pipeline region, and carrying out the preprocessing of the obtained point cloud data; performing neighborhood construction based on the preprocessed point cloud data, setting a mask attention mechanism according to a neighborhood structure, performing geometric coding and feature enhancement by using an output result of the mask attention mechanism, performing decoding operation on the enhanced features, recovering feature representation of the complete point cloud, and performing suspended span height calculation and verification based on a segmentation result. According to the method, a decoding strategy combining reverse distance weighted interpolation and jump connection is adopted, enhanced features are accurately propagated to the original point cloud, the seabed datum plane is fitted through the reverse distance weighted interpolation, and the high-risk suspended cross area can be rapidly positioned.

The invention discloses a seabed sand excavation pit slope change monitoring method, system and device and a medium. The method comprises the steps that a seabed pipeline distribution diagram for generating a target seabed sand excavation area is formulated; generating a plurality of side slope units in the target seabed sand excavation area according to the collected side slope topographic data; taking each side slope unit as a basic unit, obtaining a side slope disaster susceptibility evaluation index and a side slope disaster risk evaluation index, and carrying out risk calculation to obtain a corresponding disaster risk evaluation result; acquiring position data of each side slope unit, associating the submarine pipeline distribution map with the side slope units based on the position data of each side slope unit and the corresponding disaster risk evaluation result, and generating a side slope pipeline risk distribution model; based on the slope topographic data and disaster risk evaluation results of each slope unit in different data acquisition periods, obtaining a slope change trend of the target seabed sand excavation area; the effect of improving the change monitoring efficiency of the seabed sand excavation pit slope is achieved.

The invention discloses a drilling-grouting integrated underwater robot and aims to meet the requirement for precise operation in a complex underwater environment. The robot integrates the fin antenna, the hydraulic telescopic crawler belt, the hydrodynamic force wings, the bionic mechanical arm and the integrated drilling and injecting system, and has the multi-terrain adaptation, efficient navigation and autonomous operation capacity; through modular design and a high-strength pressure-resistant structure, the robot can complete tasks such as pipeline repair, resource exploration and infrastructure construction in a deep sea high-pressure environment; the core technology comprises a multi-mode propulsion system, intelligent sensing and navigation, AI optimization operation and dual-mode operation switching. Typical application scenes include submarine pipeline damage repair, deep sea mining area reinforcement sampling, cross-sea bridge pile foundation grouting and the like. The limitation that a traditional underwater robot is single in function and high in energy consumption is broken through, and the safety and efficiency of complex underwater engineering are remarkably improved.

The invention relates to a large-scale offshore engineering geologic model modeling system and method, and relates to the technical field of offshore engineering geologic investigation and modeling. According to the method, through the steps of multi-source data acquisition, preprocessing, fusion, three-dimensional geological modeling, model optimization, dynamic updating, visual analysis and the like, large-scale geological survey data can be efficiently processed, a high-precision three-dimensional geological model is generated, and dynamic updating and visual analysis are supported. The method has the advantages of high efficiency, high precision, real-time performance, engineering applicability and the like, and is suitable for geological modeling and geological condition analysis of engineering such as offshore wind power, submarine pipelines, ocean platforms and the like.

The invention discloses a submarine pipeline scour-vibration response analysis method based on a cross-scale coupling framework. The method comprises the following steps: establishing a multi-physics field coupling model according to geographical and structural information of a pipeline layout area and initializing the multi-physics field coupling model; marine environment data are obtained through real-time monitoring, the model is imported for scouring dynamic deduction, and a scouring boundary data set is generated. And reconstructing a multi-physics field solving environment, and forming a real-time physics solving environment package. After the model is updated, pipeline vibration response is analyzed, and a vibration data set is obtained. And performing fatigue damage analysis, deducing a flow guide field disturbance coefficient, updating the model again, performing next time step coupling calculation, and finally obtaining a full-period coupling analysis data set. And evaluating the pipeline operation safety situation based on the data set, and generating and pushing a safety report. Various physical field effects on the submarine pipeline in the marine environment are comprehensively considered, the safety of the submarine pipeline is evaluated more comprehensively, and cross-scale coupling analysis between the scouring effect and the vibration effect is achieved.

The utility model relates to a submarine pipeline cleaning device which comprises an impurity removal scraper, a guiding and positioning device, a circumferential rotation flushing device, a pipe wall cleaning device and an advancing driving device. The guiding and positioning device is used for fixing the front end of the submarine pipeline cleaning device and guiding the submarine pipeline cleaning device to advance, the circumferential rotating flushing device flushes the pipe wall, and the pipe wall cleaning device conducts final cleaning on the pipe wall. The advancing driving device is arranged at the rear end of the submarine pipeline cleaning device and provides power for driving the submarine pipeline cleaning device to advance. The subsea pipeline wall cleaning device has the effect of improving the subsea pipeline wall cleaning efficiency.

The invention discloses a submarine pipeline vortex-induced vibration analysis method based on multiple Fourier characterization PINN, and the method comprises the steps: constructing a physical information neural network, determining a loss function of an initial condition, a boundary condition and a partial differential equation (PDEs) according to a submarine pipeline vortex-induced vibration model, and adding an anchor point to correct the network, so as to improve the fitting capability of the network; a Fourier transform technology is adopted, the key frequency of vibration and the frequency value of the key frequency are accurately identified, a Fourier mapping # imgabs0 # function is introduced, and a multiple Fourier mapping network is constructed to carry out refined mapping decomposition and feature extraction on vibration signals; according to the number and the value of the key vibration frequency, the mapping times and the hyper-parameter are dynamically adjusted to overcome the limitation of the PINN in processing complex vibration signals; integrating the spatial-temporal characteristics through point-by-point multiplication, and outputting a vibration learning result; according to the method, the analysis precision is improved, the capability of processing various high and low frequency superposition vibrations is enhanced, and the problem of spectrum deviation during high-frequency information learning is effectively solved.

The invention relates to a method and system for determining the water content of a safe shutdown boundary of a submarine mixed transportation pipeline, and the method comprises the steps: carrying out a physical property parameter test, and taking the physical property parameter as a multiphase flow simulation input parameter; carrying out submarine pipeline shutdown simulation on the basis of the physical property parameter test data, and obtaining oil section temperatures and spatial distribution characteristics at different water depth positions in the pipeline; carrying out an oil-water layering characteristic experiment under a temperature control condition to obtain an oil-water emulsion layering characteristic; sampling oil sections with different layer heights in the oil-water layering characteristic experiment, and testing the water content and simulating the yield / slip characteristic at the oil section temperature based on the temperature distribution of the oil sections; according to the yield / slip stress of the oil sections with different layer heights, carrying out segmented calculation and weighted accumulation to obtain an overall starting stress; on the basis of the overall starting stress, the safe shutdown boundary moisture content is determined in combination with pressure boundary conditions. The method can effectively guide the safe transportation stopping and restarting of the submarine pipeline, optimizes the replacement operation after the transportation stopping of the submarine pipeline, and improves the operation safety and economy.

The present application relates to a kind of large thickness submarine pipeline steel plate and its production method, by the optimization design steel plate component of low-carbon low-alloy component, production method is with the special controlled rolling process of five-stage heating+recrystallization zone low temperature large reduction rolling+intermediate billet instant cooling+non-recrystallization zone high temperature large reduction rolling, and the multi-stage controlled cooling process of high temperature zone air cooling redistribution+ferrite zone cooling+waiting temperature+bainite zone cooling+air cooling self tempering cooling.The product steel plate of the present application has higher acicular ferrite proportion, and the average grain size of ferrite is finer, 3~6 μm, so that the steel plate has good strength and toughness match, the steel plate has higher strength, yield strength ≥500MPa, tensile strength ≥630MPa, and impact energy KV2 At-60 ℃, ≥250J.

The invention relates to the technical field of ocean engineering safety monitoring, in particular to a submarine pipeline soil liquefaction slippage real-time monitoring system based on a sensor network, which comprises a sensor network deployment module, a dynamic baseline analysis module, a multi-source data space-time calibration module, a coupling risk assessment module and a grading early warning module. Wherein the sensor network deployment module is used for collecting multi-parameter data; the dynamic baseline analysis module is used for calculating the dynamic baseline range of each parameter; the multi-source data space-time calibration module is used for eliminating space-time deviation between sensor nodes and outputting space-time calibration data; the coupling risk assessment module is used for calculating a soil liquefaction slippage risk coefficient; and the grading early warning module is used for triggering early warning. According to the invention, through combination of multi-parameter perception, space-time calibration and risk fusion assessment, precise monitoring and graded early warning of submarine pipeline soil liquefaction slippage are realized, and monitoring continuity and early warning timeliness are improved.

The utility model relates to the field of ocean engineering, in particular to an underwater hauling device for a submarine pipeline, which comprises a plurality of buoys and a plurality of counterweights, the buoys are arranged at intervals along the length direction of the pipeline, the counterweights are arranged at intervals along the length direction of the pipeline, the buoys lift the pipeline, the counterweights pull down the pipeline, and the pipelines are arranged at intervals along the length direction of the pipeline. The conduit is configured to be suspended in water. According to the underwater hauling device for the submarine pipeline, the pipeline is suspended in water by arranging the buoy and the counter weight, so that the pipeline can be hauled away from the bottom between a floating hauling method and a bottom hauling method, the pipeline is not in direct contact with the seabed and is not influenced by the seabed, and therefore only small hauling force is needed, and the pipeline can be hauled away from the bottom. And the pipeline can be prevented from being affected by surface wind wave flow like a floating dragging method, and the device is simple in structure, convenient to use and good in effect.

The invention discloses a technical scheme of a submarine pipeline health assessment method and system based on multi-state quantity data fusion, and the method comprises the steps: improving the defect classification precision while reducing the dimensionality through dynamic balance global variance retention and local discrimination enhancement; and a solution with high efficiency and robustness is provided for feature fusion and accurate evaluation of the multi-source high-dimensional pipeline data. The submarine pipeline health assessment method comprises the following steps: collecting monitoring data of a sensor in a submarine pipeline, the monitoring data including but not limited to stress strain, acceleration, vibration and temperature in the submarine pipeline; carrying out fusion and dimension reduction processing on the obtained multi-source heterogeneous data, and finding out a mutual relation of changes among parameters of the submarine pipeline in the same time period; calculating a pipeline damage condition coefficient and a repair index according to an analysis result of the multi-source heterogeneous data; and dividing repair grades according to the repair indexes, comprehensively judging the health state of the submarine pipeline, and giving a repair suggestion.

The invention discloses a positioning method for submarine pipeline laying for an arc-shaped route. The positioning method comprises the following steps: selecting a plurality of monitoring points on a pipe laying ship; the pipe laying ship is used for laying subsea pipelines, and the positions of the multiple monitoring points on the pipe laying ship are different; the design route of the subsea pipeline is an arc-shaped route; a measuring module and a control module are arranged on the pipe laying ship; determining parameters of the arc-shaped route; the parameters of the arc-shaped routing comprise a circle center, a radius, a starting point and an ending point; calculating theoretical track lines of the plurality of monitoring points; the actual position of each monitoring point is obtained by using the measurement module and the control module; and calculating the deviation between the actual position and the theoretical track line, and giving an early warning when the deviation exceeds a preset value. According to the positioning method for submarine pipeline laying for the arc-shaped route, the submarine pipeline can be laid on the arc-shaped route by the pipe laying ship along the optimal path.

The invention provides a multifunctional experimental device and method for simulating a corrosion state in a submarine pipeline, and belongs to the field of pipeline corrosion internal detection. The experimental device comprises an experimental device body, a heating device and a circulating pump, a medium in the experimental device body can be externally heated through the circulating pump, and in other words, the circulating pump can continuously convey the medium heated by the heating device to the experimental device body. The test method comprises a corrosion coupon experiment, a corrosion probe experiment and a double-layer pipe annulus corrosion simulation experiment. When a corrosion coupon experiment and a corrosion probe experiment are carried out, a corrosion probe and a corrosion coupon are respectively inserted into the experiment device main body, and corrosion rate data are continuously monitored and detected for 7 days; when a double-layer pipe annulus corrosion simulation experiment is carried out, wireless wall thickness detectors are sequentially attached to the three clamping grooves, and the average corrosion rate of the wireless wall thickness detectors is based on thickness measurement data of the wireless wall thickness detectors. According to the invention, a plurality of corrosion rate simulation parallel experiments can be simultaneously carried out, the operation is simple, the safety is high, and the controllability is high.

The invention relates to the field of submarine pipeline connecting devices, in particular to a step-by-step type submarine pipeline connector which comprises a lower flange and a middle flange, a sealing assembly is arranged in an inner hole of the lower flange, a slip is arranged in an inner hole of the middle flange, the middle flange is in threaded connection with an adjusting screw, and the adjusting screw is provided with a pressing sleeve pressed on the sealing assembly. The adjusting screw is used for driving the pressing sleeve to push the sealing assembly to seal the pipeline, the middle flange is connected with an upper flange through a stud, the stud penetrates through the upper flange, the end, penetrating through the upper flange, of the stud is in threaded connection with a compression nut, a slip bowl is arranged at the end of the upper flange, and the compression nut is used for driving the slip bowl to push the slip to tightly hold the pipeline. Through the arrangement of the adjusting screw, the upper flange and the adjusting screw are used for controlling pipeline holding and pipeline sealing respectively, so that the pipeline sealing process and the pipeline holding process are mutually independent and do not influence each other, and the situation that the pipeline repairing effect is reduced due to the fact that leakage is likely to occur after pipeline repairing caused by unified control of the two processes is reduced.

The invention discloses a sea area ecology-based submarine pipeline and optical cable green construction process evaluation method, and relates to the technical field of submarine engineering, and the method comprises the following steps: S1, ecological evaluation before construction: employing a satellite remote sensing technology and an underwater robot to carry out environment baseline investigation on a construction area, and in combination with the regional marine ecological protection red line and the existing ecological environment sensitive area distribution, evaluating the ecological sensitivity of the construction area, and determining a key area of ecological protection. According to the sea area ecology-based evaluation method for the green construction process of the submarine pipeline and the optical cable, by establishing an evaluation index system based on the ecological influence index, the green construction index and the resource utilization efficiency and analyzing and interpreting the evaluation result, powerful data support can be provided for construction decision making, and improvement suggestions are provided; subsequent construction activities are optimized, the green construction level of submarine pipelines and optical cables based on sea area ecology is continuously improved, the construction activities are guided, and meanwhile balance of ocean resource development and ecological protection is achieved.

The invention provides a submarine pipeline health monitoring method, device and equipment based on multi-data fusion, and belongs to the technical field of pipeline monitoring. The method comprises the steps that a physical feature sequence and a light intensity space-time image collected by a multi-source sensor system in the application process of the submarine pipeline are obtained, and the physical feature sequence is used for representing overall vibration information of the submarine pipeline and strain information at multiple different positions; the light intensity space-time image is used for representing intensity change information of optical fibers arranged on the outer side wall of the submarine pipeline; and performing fusion prediction analysis on the physical feature sequence and the light intensity space-time image by adopting a health monitoring model introducing a dynamic channel attention mechanism to obtain a risk fault prediction result of the submarine pipeline. According to the invention, fusion prediction analysis can be carried out on the multi-modal data generated when the submarine pipeline is applied through a deep learning technology, so that health monitoring of the submarine pipeline is realized more comprehensively and accurately.

The utility model discloses a submarine pipeline welding underwater robot which comprises a base, two sides of the base are rotatably connected with two first rotating rods, the two first rotating rods are fixedly connected with a plurality of clamping legs, the middle of the top face of the base is fixedly connected with a fixing block, the fixing block is rotatably connected with a semicircular gear ring, and the top end of the semicircular gear ring is fixedly connected with a fixing plate. One side of the sliding block is rotatably connected with a first rotating shaft, one end of the first rotating shaft is fixedly connected with a mechanical arm, one end of the mechanical arm is fixedly connected with a welding mechanism, and the peripheral side of the mechanical arm is fixedly connected with a high-definition underwater infrared camera. According to the marine pipeline welding mechanism, through cooperation of all the components, the welding mechanism can adjust the angle to be large, welding work can be well carried out when the marine pipeline is in a complex environment, and convenience is brought to welding work; according to the utility model, the clamping legs, the permanent magnet blocks and components are matched, so that the base can be firmly fixed on a pipeline, and the normal proceeding of welding work is ensured.

And the underwater operation robot device is used for submarine cable maintenance and docking tasks. The device comprises a carrier frame, and a floating box is arranged at the top of the carrier frame and used for guaranteeing the stability of the carrier frame; a hydraulic pump station, a pressure-resistant protective shell, a support steering wheel and a lighting system are mounted on a horizontal plate of the carrier frame, and the support steering wheel is tightly sleeved with the pressure-resistant protective shell; a double-operation manipulator device is mounted on the right side of a bottom plate of the carrier frame and comprises a mechanical arm I and a mechanical arm II; the lighting system is arranged between the mechanical arm I and the mechanical arm II; a hydraulic pump station is arranged on the left side of the horizontal plate and connected with an oil cylinder to provide lubrication for a mechanical device. The carrier frame is further provided with a power propelling device. According to the underwater operation robot, the deepwater submarine pipeline tie-back task can be completed, flexible underwater operation can be achieved through six-degree-of-freedom movement, and manual underwater operation is not needed.

The invention discloses a rotary flange underwater sealing butt joint method for a deepwater large-diameter composite pipeline, and belongs to the technical field of submarine pipeline engineering. According to the method, aiming at the problems that a traditional flange joint is insufficient in sealing reliability in a deepwater dynamic environment and lacks a long-term monitoring means, a pressure self-adaptive sealing cavity is formed in a rotating flange disc surface, internal pressure is utilized to enhance sealing specific pressure, and a pressure sensor is integrated to monitor a sealing state in real time; and meanwhile, a pressure sensor interface is reserved to realize long-term data acquisition. The device is mainly used for installation, operation and maintenance of submarine water and oil gas pipelines, and long-term sealing safety of pipeline connectors can be effectively guaranteed.

The invention provides a ship and ocean engineering structure corrosion fatigue crack propagation rate prediction method based on machine learning. The method comprises the following steps: S1, obtaining all characteristic variables; s2, screening core influence factors from all feature variables through a feature selection algorithm to obtain feature data; s3, establishing a machine learning prediction model which adopts one of a plurality of machine learning algorithms, and inputting the feature data into the machine learning prediction model to learn a nonlinear mapping relationship between corrosion fatigue crack growth rate data and the selected variables, optimizing the machine learning prediction model by using a hyper-parameter optimization method to obtain a trained model; and S4, inputting feature data of a to-be-predicted target into the trained model for prediction to obtain the corrosion fatigue crack growth rate of the to-be-predicted target. The method is suitable for service safety analysis and life evaluation of key facilities such as ships, ocean platforms and submarine pipelines.

The invention discloses a supporting and backfilling device and method for the suspended position of a submarine pipeline, and belongs to the technical field of submarine facility protection.The method comprises the steps that firstly, a plurality of supporting and backfilling unit pieces are arranged in the longitudinal direction of the submarine pipeline, and each supporting and backfilling unit piece is arranged at the suspended position of the submarine pipeline; wherein the annular pipeline wrapping cylinder wraps the outer wall of the submarine pipeline, the left supporting plate and the right supporting plate are arranged at the two ends of the upper portion of the lower annular wrapping part correspondingly, and the submarine pipeline at the suspended position of the submarine pipeline is supported; and 2, in the longitudinal flowing process of the sand flow along the submarine pipeline, the sand flow is blocked by an upper quicksand fan-shaped baffle and a lower quicksand fan-shaped baffle, the sand flow flows to a left supporting plate and a right supporting plate along the upper quicksand fan-shaped baffle and the lower quicksand fan-shaped baffle, and finally the sand flow is dredged to the suspended position of the submarine pipeline below the submarine pipeline through sand guide holes, and backfilling is achieved.

The invention relates to the technical field of ocean engineering equipment, in particular to a submarine pipeline groove angle self-adaption grinding operation method which comprises the steps that a pipeline is fixed through a clamping mechanism, the groove angle is detected in real time through a laser scanning device, and the target inclination angle of a transverse rod is calculated; an adjusting hydraulic cylinder is controlled to enable the axis of a transverse rod to be matched with a target angle, and a servo motor is started to adjust the distance between polishing rods to be matched with the groove width; the sliding seat and the transverse rod are driven to enable the grinding sleeve to be dynamically attached to the groove, and the grinding pressure is monitored in real time and subjected to closed-loop feedback adjustment; and after single-circle grinding is completed, the compensation angle is automatically adjusted according to the surface roughness for accurate grinding. The device has the advantages of high-precision groove forming, dynamic stability control, deep sea environment high adaptability, comprehensive efficiency breakthrough and the like, the groove angle consistency is high, the surface roughness is low, constant grinding pressure can be maintained, the tool wear rate is reduced, parameters can be automatically matched, the tool service life can be pre-warned, and the device adapts to deep sea high-pressure current; and the operation period can be shortened, and resource consumption is reduced.

The invention relates to the technical field of cable detection and repair, in particular to a special underwater unmanned platform for submarine pipeline cable detection and repair, which comprises an underwater unmanned aerial vehicle, a bottom plate, a cleaning seat, a support ring and a repair ring, a detection ring is fixedly mounted at the center of one end of the top of the bottom plate through bolts, a cleaning seat is fixedly mounted on one side of the top of the bottom plate through bolts, and a fixing ring is fixedly mounted at the center of one side of the cleaning seat on the top of the bottom plate through bolts. A driving gear on the repairing frame is movably engaged with a rotating tooth block on the repairing ring, so that the repairing frame stably rotates on the periphery of the repairing ring through a T-shaped positioning plate and a positioning roller, an air heater on the repairing frame is driven to rotationally heat a heat shrink tube body, heating is uniform and stable, and the repairing efficiency is improved. Therefore, the heat-shrinkable tube body is completely, uniformly and stably attached to the periphery of the submarine pipeline cable body.

The invention discloses a submarine pipeline laying device, and belongs to the technical field of submarine pipeline laying, the submarine pipeline laying device comprises a sand box, a mixed fluid pressurization conveying assembly and a vibration transmission assembly, the bottom of the sand box is provided with a slag outlet pipe, the outer surface of the slag outlet pipe is connected with a slag slurry pump, a pipeline is installed in a submarine groove, and the upper surface of the pipeline is movably connected with a pipe bag; through mutual cooperation of the water reducing agent tank, the water reducing agent pipe, the flow meter, the flocculant tank, the flocculant pipe and the water pump II, a water reducing agent and a flocculant can be accurately conveyed into the sand box, the flowability of the water reducing agent and the flocculant is ensured, and a mixture of seawater, coarse sand, the flocculant and the water reducing agent can be pumped into the pipe bag through the slurry pump; the flowing and impact of the liquid can drive the tube bag to vibrate, and then drive the vibration rod, the vibration piece, the vibration ball and the non-Newtonian fluid balls in the hole grooves to vibrate, so that the vibration of the tube bag is accelerated, the mixture is prevented from caking, and all corners of the tube bag are uniformly filled with the mixture.

This invention provides a method for designing a submarine structure based on the biomimetic characteristics of the peregrine falcon's hydrodynamics. The submarine structure retains the traditional internal structure of a submarine pipeline, but the outermost concrete counterweight layer (5) is modified from its circular shape to a streamlined design that mimics the peregrine falcon's body shape. This streamlined design features a smooth exterior contour and a surface covered with honeycomb-like holes, free of large undulations and sharp corners, effectively reducing fluid resistance. The submarine structure comprises, radially from the inside out, a steel pipe (1), an anti-corrosion insulation layer (2), a thermal insulation layer (3), a casing (4), a concrete protective layer (5), and a honeycomb structure (6). Through the technical solutions of this invention, this method optimizes the hydrodynamic performance of the submarine structure, significantly reducing the impact of hydrodynamic impact loads on the structure. It also demonstrates comprehensive protection against environmental loads such as submarine landslides, undercurrent scour, and sand wave migration. This method has broad application prospects and is suitable for a variety of marine engineering structures.