3499 results about "Buoyant flow" patented technology

The invention discloses a semi-submersible wave energy-wind energy integrated power generation platform and a damping regulation and control method of a damping regulation and control system of the semi-submersible wave energy-wind energy integrated power generation platform. The platform comprises a semi-submersible wind driven generator platform, a wind driven generator set, a wave energy power generation device, an energy storage system, a sea area detection system and the damping regulation and control system. The wave energy power generation devices are divided into two groups on the inner side and the outer side of the platform, each wave energy power generation device comprises a platform inner side wave energy power generation device and a platform outer side wave energy power generation device, and each wave energy power generation device comprises a swing arm floater, a universal hinge, a connecting arm and a damping adjusting module. The semi-submersible wind power generation device and the wave power generation device are combined, and offshore renewable resources are comprehensively utilized; the six-buoy design is adopted, buoyancy is dispersed, stability and safety are improved, and meanwhile space is provided for a wave power generation device; the floaters are symmetrically arranged in a hexagonal shape and carry a damping regulation and control system, and the whole structure is more easily stabilized by adjusting the damping of the floaters in all directions.

The invention relates to an amphibious vehicle body stability control method, system, equipment and medium, and belongs to the technical field of vehicle control, the amphibious vehicle body stability control method comprises the following steps: after a vehicle enters water, heeling angle data is acquired in real time; and when the heeling angle data exceeds a set threshold value and the maintaining time exceeds a preset duration, the volumes of air bags arranged on the two sides of the vehicle are adjusted in real time so that buoyancy distribution can be adjusted, and the purpose of stably controlling the vehicle body is achieved. According to the overwater vehicle body stability control method and system based on multi-sensor fusion and dynamic adjustment disclosed by the invention, the problems of turning, heeling and wave interference when the vehicle sails on the water surface are solved. The stability of amphibious vehicle sailing on water is greatly optimized, and the amphibious vehicle is suitable for development of intelligent amphibious vehicles in the future.

In an embodiment, a water egress system is disclosed that provides individuals or pets with ease of access to elevated areas from the water. The water egress system includes a buoyant base including a ramp. The water egress system further includes a bolster disposed proximate to a surface of the base and an attachment mechanism that is configured to secure the bolster to the base.

The invention relates to the technical field of ocean engineering equipment, in particular to a marine organism cleaning floating ship used at a cold source water intake of a nuclear power station, which comprises a buoyancy platform, four hydraulic winches are mounted and connected on the buoyancy platform and are distributed at the left upper corner, the right upper corner, the left lower corner and the right lower corner of the buoyancy platform; the buoyancy platform is provided with a cleaning suction device used for cleaning marine organisms on the intercepting net, the buoyancy platform is further connected with a discharging pipeline with a downward outlet, the cleaning suction device is provided with a suction pipe, and the flow of the suction pipe can be changed. The cleaning suction device is further provided with a cleaning brush capable of washing marine organisms on the intercepting net, and the cleaning effect is better optimized.

The invention provides a narrow gap swing laser welding pool wettability prediction method based on CFD simulation. The method comprises the following steps that an interaction platform is constructed through Python + PyQt5, and geometric modeling, UDF compiling and a material library module are integrated; the groove parameters and the swing track are dynamically loaded to a Fluent solver, and a full-coupling transient model of a steam recoil pressure-buoyancy-molten drop mass source item is established; in CFD-POST, the widest section of the molten pool is positioned on the basis of the contour surface with the volume fraction being 0.5, and Z-direction displacement-flow velocity data are extracted along the two side wall surfaces; fusing defects are predicted through double criteria of a bilateral average flow velocity difference threshold value and F test variance homogeneity; according to the method, dynamic quantitative evaluation of wetting behaviors can be achieved, the process development period is shortened, the defect detection rate is increased, and the method is suitable for aerospace thick plate welding quality control.

A buoyancy compensator bladder includes an air cell, a connector, a low-pressure inflator (LPI), and at least one over pressure valve. The LPI which inflates and deflates the air cell is positioned on an outer surface of the air cell. As a result, when the fully assembled buoyancy compensator is equipped by a diver, the LPI runs from behind the diver's torso and under their armpit. This results in the inflator head which is part of the LPI to be disposed on the front of the diver's chest during back mount or side mount diving. This structure allows the bladder to be easily used for either back mount or side mount diving. The bladder may further be equipped with auxiliary / non-essential devices such as wight pockets / pouches.

The invention discloses an intelligent layering and guiding device for highway tunnel fire smoke and a control method, and relates to the technical field of tunnel fire safety, a smoke flow Froude number is introduced as a direct control target, the parameter represents the ratio of smoke flow inertia force to buoyancy force, the numerical value directly determines the stability of a layering interface, and the layering interface can be directly controlled. The Froude number of each subarea of the tunnel is calculated in real time through a sensing network and is compared with a critical value calibrated through an experiment, when a real-time value is lower than the critical value, it is indicated that inertia force is relatively insufficient, the buoyancy effect is dominant, and instability and entrainment are likely to happen to an interface between a smoke layer and lower cold air, and then according to a control algorithm, the smoke layer and the lower cold air are controlled. The micro jet fan applies directional inertia force to a smoke layer by adjusting the angle and the speed, the intelligent induction smoke outlet optimizes local pressure difference and flow by adjusting the opening degree and assists in maintaining flowing, the smoke flowing state is actively locked in a stable layered flow interval, and mixing and sedimentation caused by flow state instability are prevented.

A buoyant hydrodynamic pump is disclosed that can float on a surface of a body of water. Wave-driven oscillations result in periodic upward ejections of water inside a downwardly projecting tube that can be collected in a reservoir. Water within such a reservoir may return to the body of water via a turbine, thereby generating electrical power, or the device's pumping action can be used for other purposes such as water circulation, propulsion, dissolved minerals extraction, or cloud seeding.

The invention discloses a global cost optimization method based on deep-sea mining operation system safety. The method comprises the following steps: determining design parameters of each system based on global cost optimization and a coupling relationship between the systems; materials are selected based on light load-stability, a self-cleaning nozzle is carried, and a crawler walking system is optimized; a two-way hydraulic-pneumatic energy conversion mechanism is used for optimizing a buoyancy compensation system; a hybrid power efficiency optimization algorithm is adopted to optimize a water surface support system based on a safety burden mitigation technology; a planetary gear is used for amplifying torque, and an electrolyzed water trigger type release mechanism is adopted in the laying and recycling process, so that a laying and recycling system is optimized; based on the principle of low energy consumption, a three-axis IMU data fusion technology is applied, and a three-degree-of-freedom active-passive combined heave compensation system is optimized; the method can effectively solve the problem of high cost of deep-sea mining, realizes safety, burden reduction, cost reduction and benefit increase of a deep-sea mining system, and optimizes the global cost of deep-sea mining operation.

A pontoon boat is provided that includes a deck and a plurality of pontoons running longitudinally beneath the deck and providing buoyancy to the pontoon boat. The plurality of pontoons include a multi-chine configuration that increases the stability of the pontoon boat and provides handling characteristics similar to that of a hulled boat. The plurality of pontoons may include two outer pontoons and a third pontoon positioned laterally intermediate the outer pontoons. The third pontoon may include a plurality of chines, and each of the outer pontoons may include at least one chine. At least a portion of each of the at least one chines of the outer pontoons may be positioned vertically below the plurality of chines of the third pontoon. The chines on the third pontoon may extend longitudinally further than each of the at least one chines of the outer pontoons.

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 a grid-adaptive sub-mesoscale hybrid parameterization method and system, and the method comprises the steps: calculating an effective resolution and a frontal scale according to the spatial resolution of an ocean model, carrying out the calibration of a horizontal buoyancy gradient, and calculating an air-sea interface buoyancy flux and a horizontal Akkerman buoyancy flux according to the calibrated horizontal buoyancy gradient; and calculating to obtain expressions of the convective mixing effect and the sub-mesoscale mixing effect, and a vortex viscosity coefficient and a vortex diffusion coefficient of the sub-mesoscale mixing effect. According to the method, the problem that an existing parameterization scheme cannot be applied to a coarse-resolution ocean model at present is solved, and the effect of introducing sub-mesoscale mixing into ocean models with different resolutions is achieved.

A device to facilitate weight operation in a Buoyancy Control Device (BCD) is described. The device may include a tubular body made from waterproof fabrics. The tubular body may have an exterior, a top opening, and a bottom opening. The device may include a semi-rigid tab and a pair of fastening assemblies attached to the exterior of the tubular body. The top opening may have boning that supports the top opening in an open state. The top end of the semi-rigid tab is fixed to the exterior and is close to the top opening of the tubular body, the bottom end of the semi-rigid tab is in contact with the exterior as a result of a rigidity of the semi-rigid tab. The pair of fastening assemblies are positioned on opposite sides of the semi-rigid tab.

The invention relates to the technical field of blue-green algae cleaning, and discloses a blue-green algae cleaning boat and a cleaning method.The blue-green algae cleaning boat comprises a boat body, a bearing frame, a cleaning assembly, a dumping and collecting box and a power supply driving assembly, and the boat is composed of two suspension bodies to improve buoyancy and stability. The bearing frame is located on the inner side of the ship body and provides a bearing area for installing the cleaning assembly and other related components. The cleaning assembly is located above the bearing frame and used for cleaning and conveying algae pollutants. And the dumping and collecting box is arranged at the tail end of the cleaning assembly and is used for receiving and storing the cleaned and conveyed algae pollutants. The power supply driving assembly provides assembly working power and supports work of the cleaning assembly. The small boat firstly runs to a preset position and is accurately positioned by additionally arranging a built-in navigation system. And after the blue-green algae arrives at the target area, the cleaning assembly starts to work, and the blue-green algae is removed from the water surface through a cutting and conveying mechanism and conveyed into a dumping and collecting box. The cleaned algae are directly conveyed into the collecting box through the conveying device, and the pollutant collecting process is completed.

The invention belongs to the technical field of rescue equipment, and particularly relates to a foldable flight lifesaving device which comprises a shell, a plurality of partition plates are arranged in the shell, and the interior of the shell is divided into a buoyancy bin, a plurality of storage bins and a plurality of air inlet bins through the partition plates. The multiple storage bins are located on the two sides of the interior of the shell correspondingly, the cross section of each storage bin on the horizontal plane is in a U shape, the multiple air inlet bins are located at the two ends of the interior of the shell correspondingly, and the expansion assemblies are assembled in the storage bins and comprise air bags and air valves. The high-pressure micro air pump is started to inject air into the air bag, the air bag in the folded state is converted into the stretching state, the air bag in the stretching state and the shell can form a temporary danger avoiding area, people falling into water climb on the temporary danger avoiding area to wait for rescue, and the temperature loss phenomenon caused by long-time soaking in low-temperature water is avoided.

The utility model discloses an unmanned ship rollover prevention device which comprises two rollover prevention assemblies of the same structure, the two rollover prevention assemblies are symmetrically and fixedly installed on the two side portions of a ship body, each rollover prevention assembly comprises an installation base, an extension module and a driving module, the installation bases are fixedly installed on the side portions of the ship body, and the extension modules are fixedly installed on the side portions of the ship body. A mounting groove is formed in the mounting base, one end of the extension module is fixedly mounted in the mounting base, the extension module is located in the mounting groove, and the driving module is mounted in the ship body and connected with the extension module; according to the anti-rollover device for the unmanned ship, the anti-rollover assemblies are arranged on the two sides of the ship body correspondingly, when the anti-rollover assemblies are unfolded, the buoyancy of the ship body can be effectively enhanced, meanwhile, the base contact area of the ship body and the water surface is enlarged, the overall supporting area of the ship body is enlarged, and the wind wave resistance is improved; the situation that the ship body rolls over due to overlarge storm waves is effectively reduced, then the safety of the ship body is effectively guaranteed, and the possibility that the ship body is damaged is reduced.

The invention relates to the technical field of underwater vehicle detection, and discloses a self-adaptive underwater vehicle suitable for an estuary high-salinity and high-turbidity environment and a detection method, and the vehicle integrates an environment perception module, a density inversion module, an acoustic configuration module, a buoyancy control module, a silent observation module and the like. By fusing the temperature-salinity-depth and acoustic backscattering data, the additional density caused by the suspended sediment is inverted, and a total environment density parameter is constructed; according to the parameter, a variable buoyancy system is driven by feedforward control logic to adjust the drainage volume, and buoyancy fluctuation caused by density abrupt change is counteracted in advance. The system dynamically switches the acoustic detection frequency according to the local turbidity and corrects the time-varying gain curve; cutting off propelling power in a neutral hovering state to enter a silent drifting mode, and executing sediment flux observation without mechanical disturbance. According to the invention, the problems of buoyancy adjustment lag, acoustic signal attenuation and propulsion disturbance in the complex water body of the estuary are effectively solved, and the dynamic stability and the observation data quality are remarkably improved.

The invention discloses a protective device for offshore power generation, which relates to the field of offshore energy equipment protection and comprises a multi-stage buffer anchor cable system, an annular cabin type floating body structure, a dynamic gravity center adjusting unit and an anti-resonance component. The multi-stage buffering anchor cable system is arranged in the circumferential direction of the floating body and comprises a main cable, an elastic buffering section, a damping adjusting section and a universal hinge joint. The annular cabin type floating body structure is provided with an inner cabin body, an outer annular cabin and a wave impact guide plate; the outer annular cabin is divided into an independent sealed cabin; the dynamic gravity center adjusting unit is arranged at the bottom of the inner cabin body, and the anti-resonance assembly is horizontally arranged in the outer annular cabin; according to the device, storm impact is attenuated through multi-stage buffering anchor cables, and buoyancy is optimized to resist waves through an annular cabin structure and a flow guide plate; the dynamic gravity center adjusting unit adjusts the balance weight in real time to counteract inclination of the floating body; the anti-resonance partition plate inhibits resonance, reduces structural abrasion, can adapt to complex sea conditions, guarantees stable operation of power generation equipment, prolongs the service life, and provides safety protection for offshore clean energy development.

The invention discloses an unmanned underwater laying device which comprises a load electronic cabin and a buoyancy material module, a first control magnet is arranged on the buoyancy material module, and a first magnetic control switch is arranged in the load electronic cabin; the unmanned underwater laying device has at least two working states; in the first working state, the unmanned underwater laying device is mounted on the unmanned underwater vehicle, the buoyancy material module is arranged between the unmanned underwater vehicle and the load electronic cabin, the distance between the first magnetic control switch and the first control magnet is within the effective action distance range of the magnet, and the first magnetic control switch is in an off state; under the condition that the unmanned underwater vehicle arrives at the target position, the unmanned underwater laying device is laid from the unmanned underwater vehicle, the unmanned underwater laying device is in the second working state, the buoyancy material module is separated from the load electronic cabin, and the first magnetic control switch is in the on state, so that the load electronic cabin is powered on. According to the embodiment of the invention, the invalid consumption of the battery of the unmanned underwater laying device can be minimized.

The utility model provides an underwater robot for bridge detection, which relates to the technical field of bridge detection, and comprises a robot main body, a floating component for providing floating force is arranged at the upper part of the robot main body; the propeller set comprises two side propellers and two tail propellers, the two side propellers are located on the front face of the robot body, and the two tail propellers are located at the same end of the buoyancy assembly and symmetrically arranged front and back; and the two symmetrical walking mechanisms are arranged on the robot main body through mounting structural members. The beneficial effects of the utility model are that through the reasonable layout of the propeller group and the cooperative work of the propellers at the two sides and the tail part, accurate water surface positioning and movement are realized, and the robot is ensured to smoothly approach and fit a pile foundation from the water surface; the posture of the whole machine does not need to be adjusted when the pile foundation is close to the pile foundation, and the pile foundation can be directly adsorbed and attached through the propellers on the two sides; a tensioning mechanism in the walking mechanism has self-adaptability, and an elastic support is matched with a connecting frame connected in a sliding mode.

The invention provides a resetting system and a resetting control method for an offshore floating energy island, and the resetting system comprises a counterweight adjusting module which comprises a servo motor, an annular mooring chain track and a counterweight block. The buoyancy adjusting module comprises air supply equipment and an air bag. And the thrust adjusting module comprises a horizontal thrust adjusting module and a vertical thrust adjusting module. And the monitoring module comprises a plurality of groups of sensors to monitor the position information of the energy island in real time. When the energy island is in vertical unbalance, the servo motor drives the balancing weight to move along the annular mooring chain track, and first-stage reset adjustment is carried out; further, the air supply equipment inflates and deflates the air bag for secondary reset adjustment; further, a vertical thrust adjusting module provides vertical thrust to carry out three-stage reset adjustment; when the energy island is horizontally unbalanced, the horizontal thrust adjusting module provides horizontal thrust and pushes the floating body main structure to achieve horizontal reset adjustment. According to the scheme of the invention, through a multi-stage reset strategy, the reset efficiency of the energy island and the adaptability in an extreme environment are improved.

The invention relates to the field of floating type photovoltaics, and discloses a floating type photovoltaic mooring method and device, and according to the mooring method, an anchoring point, a mooring rope and an adjusting assembly are provided; an anchoring point is arranged at the preset elevation of the bank slope, the first end of a mooring rope is fixedly connected to the anchoring point, and the second end of the mooring rope is connected with the floating photovoltaic module; the tension value F of the mooring rope is monitored in the water level change stage, the tension of the mooring rope is dynamically adjusted through the adjusting assembly, water is automatically injected / drained according to the water level change to maintain the pre-tightening tension F1, and the mooring rope and the floating type photovoltaic assembly are limited. The device can adapt to water level fluctuation, automatic sliding adjustment is achieved through gravity and buoyancy balance by means of the floating body, elastic elements are not needed, and fatigue failure can be avoided; closed-loop adjustment is formed by monitoring tension feedback of the mooring rope, and it is ensured that the mooring system is in the optimal tensioning state all the time. Moreover, a sliding rail or an anchoring point does not need to be arranged on the reservoir wall, the anti-seepage layer is protected, and the reservoir basin anti-seepage structure is prevented from being damaged.

The invention provides a leading pretreatment device for pumping and cleaning clustered marine organisms and floaters, the leading pretreatment device comprises a buoyancy platform, a butt joint structure, a controller and a dispersion assembly, a treatment cabin is arranged in the middle of the buoyancy platform, and the dispersion assembly is composed of a turbulent flow triggering assembly and a liquid spraying assembly; impurities are collected in a suction mode, the device is provided with self-buoyancy and a modular structure and can be rapidly in butt joint with a tail bag of an interception net, the optimal suction posture is achieved, and the core innovation of the device is that a dispersing assembly and a cutting device are sequentially arranged in the suction direction, material distribution is achieved through a rotating cylinder and a conical column, and high-frequency vibration and a reverse micro-impact mechanism are combined; the block mass structure is effectively damaged; by adopting the unique design of the fixed impeller and the rotary volute, an annular liquid curtain is formed when the barrel rotates, so that the winding property and the overall strength of disaster-causing objects can be reduced, the disaster-causing objects are more easily scattered and cut by subsequent components, the subsequent mechanical load is reduced, the problem of blockage of a flow channel is solved, and the energy consumption and the abrasion of equipment are reduced.

The embodiment of the invention provides a large vertical shaft and a construction method thereof, and belongs to the technical field of underground constructions.The vertical shaft comprises a shaft body formed by splicing a plurality of segments; the top ring beam is annular and is arranged on the outer side surface of the top of the shaft; the uplift piles are arranged below the top ring beam in the depth direction of the vertical shaft and located on the outer side of the shaft; the bottom end of the uplift pile is lower than the bottom end of the shaft and is integrally connected with the bottom end of the shaft in a pouring mode. The top ends of the uplift piles are fixedly connected with the top ring beam; the horizontal distance between the uplift pile and the outer side face of the shaft is smaller than or equal to the pile diameter of the uplift pile. According to the large vertical shaft and the construction method thereof, the uplift piles, the top ring beam fixed to the stratum and the shaft are fixedly connected into the integrated structure, buoyancy caused by underground water on the periphery of the deep vertical shaft can be resisted, and the large vertical shaft and the construction method thereof can be suitable for building the ultra-large and ultra-deep vertical shaft with the diameter being 16 m or above and the depth being 50 m or above.

This application provides a large vertical shaft and its construction method, belonging to the field of underground construction technology. The shaft includes: a shaft cylinder composed of multiple ring segments; a ring-shaped top beam located on the outer side of the top of the shaft cylinder; and tension piles positioned below the top ring beam and outside the shaft cylinder along the shaft's depth direction. The bottom of the tension piles is lower than the bottom of the shaft cylinder and is cast integrally with it. The top of the tension piles is fixedly connected to the top ring beam. The horizontal distance between the tension piles and the outer side of the shaft cylinder is less than or equal to the pile diameter. The large vertical shaft and its construction method provided in this application integrate the tension piles, the top ring beam fixed to the ground, and the shaft cylinder into a single structure, capable of resisting the buoyancy caused by groundwater surrounding a deep shaft. This method is suitable for constructing ultra-large and ultra-deep vertical shafts with diameters exceeding 16 meters and depths exceeding 50 meters.

The utility model discloses an aeration membrane tube and a hoisting type aeration system. The aeration membrane tube comprises an air inlet joint, a supporting tube and a porous membrane tube, the supporting pipe is connected with the air inlet connector, the supporting pipe and the air inlet connector form an air distribution chamber, the air distribution chamber is separated from an inner cavity of the supporting pipe, and an opening for communicating the inner cavity of the supporting pipe with the outside is formed in the tail end, away from the air inlet connector, of the supporting pipe. The porous membrane tube is sleeved outside the supporting tube, at least one end of the porous membrane tube is annularly fixed through a clamp, a gap between the porous membrane tube and the side wall of the supporting tube forms an inflation space, and an air inlet communicated with the inflation space is formed in the side wall of the air distribution chamber. The buoyancy of the air cavity during aeration is counteracted by utilizing gravity, the aeration membrane tube does not need to be fixed by adopting a fixing bracket, the mounting process is simplified, the cost is reduced, the aeration membrane tube is hoisted and fixed, the relative levelness of the aeration membrane tube can be controlled at the top of the tank, the same aeration water depth and aeration uniformity are ensured, and the aeration efficiency is improved. And the aeration system can be mounted and overhauled outside the tank body.

The invention relates to a water surface floating type flying water pump system for large-flow long-time operation, and belongs to the technical field of special operation unmanned aerial vehicles and fluid conveying. The system integrates a multi-rotor flying platform, a buoyancy stabilizing device, a large-flow water pump module, a high-strength flexible water conveying pipeline and an intelligent control system. The core of the system is that the system can land on an open water surface, stable floating is achieved through the buoyancy stabilizing device, and a water inlet of the water pump module is submerged into water to directly pump water. By means of the floating water taking mode, the flying platform does not need to hover during operation, energy consumption is greatly reduced, ultra-long operation time is achieved, the limitation of the liquid carrying amount of the unmanned aerial vehicle is broken through, and continuous high-flow water pumping can be conducted through a high-power water pump. The system supports independent operation of a single device or networking collaborative operation of multiple devices, dynamically distributes water supply tasks, can be used as an aerial extension arm of a ground fire fighting truck, and is mainly applied to emergency rescue scenes such as high-rise building fire fighting and forest fire fighting.

The invention discloses a mobile platform for DCM construction of a deep soft foundation in a swell sea area. The mobile platform comprises a suction bucket foundation, a track beam, a sliding system and a bearing platform. The suction bucket foundation is positioned below the track beam; the bearing platform is slidably arranged on the track beam through the sliding system, the suction bucket foundation comprises a suction bucket, a pumping and filling device and a buoyancy pile, the suction bucket is of a bucket-shaped structure with a closed upper end and an open lower end, one end of the buoyancy pile is fixedly connected with the suction bucket, and the other end of the buoyancy pile is used for supporting the track beam; water is pumped out of the suction bucket through the pumping and filling device, sinking and penetrating of the suction bucket foundation are achieved, air is inflated into the suction bucket through the pumping and filling device, floating of the suction bucket foundation is achieved, the suction bucket foundation is adopted, the platform foundation is suitable for deep and thick soft soil areas, rapid installation and pulling-out of the platform foundation can be achieved, recycling is achieved, and the material consumption is reduced. The influence of medium and long period surges on DCM equipment construction can be effectively reduced, the operation window is greatly improved, and the construction efficiency is effectively improved.

The invention provides an automatic pool cleaning device, a control method and a computer storage medium. The automatic pool cleaning device comprises a buoyancy adjusting mechanism, and the control method comprises the steps that the automatic pool cleaning device is controlled to execute a pool wall cleaning task; in the process that the automatic pool cleaning device moves from the pool bottom to the pool wall, after the automatic pool cleaning device meets preset conditions, the buoyancy of the automatic pool cleaning device is adjusted through the buoyancy adjusting mechanism, and the automatic pool cleaning device can move upwards along the pool wall.

Methods and systems are discussed. In some cases, the methods may include deploying a modular untethered downhole tool in a wellbore. The modular untethered downhole tool includes a positive buoyant system and a sensing system with a sensor. The sensing system is threadedly attached to the positive buoyant system. The positive buoyant system may be replaced by threading a replacement positive buoyant system to the sensing system.