6085 results about "Buoyant flow" patented technology

The invention provides a method for constructing a differential diffusion small flame model for buoyancy-driven plume, and the method is applied and expanded to a pool fire combustion process in the field of fire safety. According to the method, the buoyancy driven plume is solved by using the small flame model, the solving number of component equations of the buoyancy plume is greatly reduced through coordinate conversion dimensionality reduction processing, and the main characteristics of the buoyancy plume can be reproduced with relatively high precision and a faster calculation rate. According to the method, high-precision numerical solution of buoyancy plume is realized, and pool fire combustion of gas fuel and liquid fuel and numerical solution of all plume driven by buoyancy can be processed.

Embodiments include a buoyant wave energy converter. In an embodiment, the wave energy converter comprises an upper chamber having a first fluid reservoir and a first gas pocket, and a lower chamber having a second fluid reservoir and a second gas pocket. In an embodiment, an injection tube is between and fluidly coupled to the upper chamber and the lower chamber, where the injection tube is to impel a fluid from the second fluid reservoir into the first fluid reservoir when the upper chamber, the lower chamber and the injection tube oscillate about a waterline with the upper chamber adjacent to the waterline and the lower chamber submerged below the waterline and vertically beneath the upper chamber. An effluent tube is fluidly coupled to the upper chamber and the lower chamber, where the effluent tube is to return the fluid from the first fluid reservoir to the injection tube.

The invention provides a floating attitude adjustment and optimization system for a floating type offshore wind power equipment group, and relates to the technical field of offshore wind power equipment, and the system comprises a sensing monitoring module which collects an equipment operation attitude parameter set and a marine environment data set in real time; the information is transmitted to the central control unit through the data transmission module, and is analyzed and processed by the equipment attitude prediction module to generate equipment attitude prediction information; the adjustment strategy generation module obtains a target attitude adjustment strategy based on the equipment attitude prediction information and the construction information of the buoyancy attitude adjustment device; the adjustment parameter generation module obtains attitude dynamic adjustment parameters; and the attitude adjustment execution module performs multi-point attitude adjustment and dynamic feedback optimization on the equipment group. The technical problem that an existing floating type wind power equipment set lacks a flexible floating posture adjusting means and is difficult to cope with floating posture changes caused by a complex marine environment is solved, the operation stability of the equipment set is improved, and therefore the power generation efficiency is improved, and the service life of the equipment is prolonged.

The invention discloses a thick plate welding residual stress numerical prediction method based on heat-fluid-solid multi-field coupling, which combines computational fluid dynamics with a finite element method, and comprehensively considers the flow characteristic and thermodynamic effect of liquid metal. In the CFD, the influence of metal melting, molten pool flowing, surface tension, buoyancy, heat transfer and fluid flowing on the geometric shape and temperature distribution of the weld joint is simulated, in the FEM module, the geometric shape and temperature difference of the weld joint are calculated based on the CFD, residual stress and deformation are further simulated and analyzed in combination with a life-death unit technology, and through the FEM module, the residual stress and deformation of the weld joint are obtained. The forming mechanism of the convex welding seam, the evolution rule of the thick plate welding residual stress and the influence of the geometrical shape on residual stress concentration are systematically researched.

The invention discloses a construction method of an ultra-deep buoyancy type double-wall steel hanging box based on a strong tide reciprocating flow sea-crossing bridge bearing platform. The construction method comprises the five process steps of preparation before construction of the steel hanging box, hoisting and lowering of the steel hanging box, preparation before pouring of bottom sealing concrete, pouring of the bottom sealing concrete and construction of the bearing platform. According to the design and construction method for the ultra-deep buoyancy type double-wall steel hanging box based on the strong tide reciprocating flow sea-crossing bridge bearing platform, the buoyancy cabin is arranged for the double-wall steel hanging box of the strong tide rapid flow ultra-large water head to ingeniously solve the problem that the self weight of the steel hanging box is large, four pile casing post-cast strips are reserved to serve as stabilizing measures for resisting reciprocating flow impact in the bearing platform construction period, and the construction efficiency is improved. The construction technology is ingenious, a foundation is laid for smoothly achieving the construction period target of the Hangzhou bay cross-sea railway bridge, and good economical efficiency, practicability and application and popularization value are achieved.

The invention discloses a water quality monitoring device and a monitoring method thereof, and relates to the technical field of water quality monitoring, the water quality monitoring device comprises a supporting plate, a buoyancy mechanism and a driving paddle, the buoyancy mechanism is arranged below the supporting plate, the driving paddle is installed on one side of the buoyancy mechanism, the water quality monitoring device further comprises a multi-parameter lifting water quality detection mechanism and a self-cleaning mechanism, the multi-parameter lifting water quality monitoring mechanism comprises a multi-parameter sensor group and a swing type filtering mechanism for protecting the multi-parameter sensor group, and the swing type filtering mechanism swings back and forth in the lifting process of the multi-parameter lifting water quality monitoring mechanism. Various water quality data can be monitored by means of the multi-parameter sensor group, after monitoring is completed every time, the swing cylinder swings in a reciprocating mode, the spray head is linked to wash the multi-parameter sensor group, meanwhile, the soft brush is linked to ascend and descend, the sensors are wiped, cleaning is achieved, and the influence on the accuracy of next water quality data collection is reduced.

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 discloses a deep-sea self-expanding horizontal array acoustic subsurface buoy, which relates to the field of deep-sea underwater acoustic detection and comprises an expanding platform arranged at the top of the acoustic subsurface buoy, a subsurface buoy main body positioned below the expanding platform and an anchoring structure connected below the subsurface buoy main body, the subsurface buoy body comprises a buoyancy platform arranged below the unfolding platform and an equipment platform arranged below the buoyancy platform. The problem that a hydrophone linear array composed of a plurality of large-scale acoustic linear arrays is folded and automatically unfolded into a cross horizontal array is solved, and integration of a deep-sea acoustic emission system, an acoustic receiving system, an underwater acoustic communication system and an equipment supply system is achieved. The whole subsurface buoy can be quickly and conveniently released and recycled, and high-reliability anchor mooring is achieved.

The invention relates to the field of offshore floating type wind power, in particular to an automatic buoyancy adjusting system and method for a floating type draught fan platform, the adjusting system comprises a buoyancy device which is fixedly installed on a stand column or a buoyancy box, the buoyancy device comprises a semi-flexible shell, and at least one air bag is arranged in the semi-flexible shell; the volume of the air bag is determined through the following steps that S1, real-time motion data and environment data of the floating type draught fan platform are obtained; and S2, whether the current posture of the floating type fan platform is stable or not is evaluated by analyzing the real-time motion data and the environment data, and if not, the size of an air bag is adjusted by inflating and deflating. By arranging the buoyancy device, buoyancy can be flexibly adjusted according to sea conditions, heaving, trim and rolling motions of the floating fan platform under the action of waves, wind loads and ocean currents are remarkably reduced, the platform can adapt to rapid changes of the sea conditions in a short time, and impact of stormy waves on the platform is reduced.

The invention relates to the cross technical field of fluid mechanics and machine learning, and discloses a particle fluid two-phase flow simulation and reverse optimization method based on deep learning. The method comprises the following steps: constructing a two-phase flow coupling simulation framework based on a fusion discrete element method and smoothed particle fluid dynamics; the drag force, buoyancy and capillary force between particles and fluid are introduced, and the calculation efficiency is improved through GPU parallel acceleration; a graph neural network is adopted to establish a particle-level dynamic interaction modeling framework, and coding and prediction of solid particles and fluid particles are independently processed; a differentiable reverse design system is further developed, and layout parameters of a flow control structure are dynamically optimized based on a gradient descent method by combining automatic differential characteristics of GNN and surrounding target functions such as flow collapse degree and centroid offset, so that effective suppression of two-phase flow destructive behaviors and system performance optimization are realized. The method has high-precision simulation and efficient optimization capabilities, and is suitable for complex two-phase flow engineering scenes such as dam burst and debris flow prevention and control.

A wave energy power generation device includes a plurality of up-down moving mechanisms configured to move up and down along a spiral rod under the action of waves, a mass block arranged at a lower part of the power generation device; a buoyancy barrel arranged in the middle of the power generation device, a guide rail arranged on one side of the up-down moving mechanism, and a spiral rod. Through the interaction of the up-down moving mechanism and the spiral rod, the up-down movement of waves can be converted into rotational kinetic energy, a scroll spring is used for storing energy, then the rotating speed is stabilized through an escapement mechanism, a power generation assembly accelerates energy output, and finally a generator is driven to generate power.

The invention discloses a maneuvering fish searching platform system and a maneuvering fishing method.The maneuvering fish searching platform system is characterized in that one or more of a marching power assembly, a fish luring device and a fish searching device are detachably integrated on a buoyancy body assembly, the buoyancy body assembly can correspondingly march on water, and meanwhile when the fish searching device detects that a fish school appears within a preset distance, the buoyancy body assembly is driven to move back and forth; the fish luring device starts a fish luring working condition, so that a fish school is close to the fish luring device and correspondingly gathers, and the functions of flexibly and visually searching and luring the fish are realized, so that the device has the characteristics of flexibly and efficiently searching and luring the fish by adding the maneuvering function, conditions are provided for follow-up net fishing or rod fishing, and the fish luring efficiency is improved. And through the method, multiple persons can participate in fish searching and fish luring activities, so that the characteristic of enjoying fishing fun is achieved, the interestingness of the activity process is increased, and the method has a better application prospect and a higher popularization value.

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 discloses an underwater operation robot. The underwater operation robot comprises a multi-direction posture self-stabilization structural frame and a rotary cleaning system; the structural frame comprises a buoyancy pipe, and a flowing medium is arranged in the buoyancy pipe; the rotary cleaning system comprises a plurality of rotary cleaning discs and a water inlet, and the water inlet communicates with external water supply equipment to supply water to the rotary cleaning discs; the rotary cleaning disc comprises a cavitation nozzle obliquely arranged relative to the rotary cleaning disc, and when the cavitation nozzle sprays liquid, the counter-acting force of the cavitation nozzle drives the rotary cleaning disc to rotate. According to the underwater operation robot, the structural frame with the multi-direction posture self-stabilizing function is adopted, the flowing medium is injected, autonomous keeping of the underwater posture of the robot is achieved, and the control difficulty is reduced. In addition, the rotary cleaning system adopts the cavitation jet technology, the cleaning effect is good, the rotary cleaning disc can spin when the cavitation nozzle sprays water, no extra energy or no driving mechanism is needed to drive the rotary cleaning disc to rotate, the structure is simple, and the reliability is high.

The invention provides a method, device and equipment for determining a buoyancy generation item of atmospheric turbulence kinetic energy and a storage medium, and the method comprises the steps: obtaining the wind speed at a plurality of moments through a wind measurement radar within a specified time length, and obtaining the buoyancy generation item of the atmospheric turbulence kinetic energy according to the wind speed at the plurality of moments; the dissipation rate and pulsation components corresponding to the wind speed in different coordinate axis directions are determined, a turbulence trend item, a shear generation item and a turbulence transmission item are determined according to the pulsation components corresponding to the different coordinate axis directions, and the wind speed is acquired by adopting a wind measurement radar, so that the spatial resolution and the data continuity of data are improved, and the detection range is expanded. And more accurate dissipation rate, turbulence trend term, shear generation term and turbulence transmission term are determined, so that the buoyancy generation term of the atmospheric turbulence kinetic energy can be more accurately deduced according to the dissipation rate, turbulence trend term, shear generation term and turbulence transmission term, and the accuracy of the buoyancy generation term is ensured.

The invention discloses a marine ranch breeding device, and belongs to the technical field of marine ranches, the marine ranch breeding device comprises a supporting plate, a fixing rod is fixedly mounted on the bottom wall of the supporting plate, and a feeding assembly is arranged on the supporting plate; the feeding assembly comprises a vertical rod fixedly installed on the top wall of the supporting plate, and a buoyancy plate is installed on the vertical rod in a sliding mode. According to the feeding device, by arranging a feeding rod, in the telescopic pipe contraction process, airflow in a telescopic pipe flows into an annular groove through a first air pipe and flows into a feeding groove through the annular groove, so that the pressure in the feeding groove can be increased, the feeding rod moves towards the outside of the feeding groove under the action of the pressure, an elastic cushion is stretched, and the feeding rod is moved out of the feeding groove; and then, in the moving process of the feeding rod, the feed in the feed storage tank is driven to move out of the feeding tank and fall into the marine ranch, that is, the feed can be automatically fed into the marine ranch without power equipment, and the effect of improving the feeding effect is achieved.

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.

The invention provides an arrangement method of a steel fishway structure capable of automatically pulling and stretching along with water level changes. The arrangement method comprises the steps that the water level difference of an inlet and an outlet of a fishway is monitored in real time; the buoyancy driving assembly is triggered according to the water level difference to drive the steel fishway subsections to move along the rails; calculating the telescopic length based on the water level difference and the fishway base length to ensure that the gradient is within the design range; the track motor is controlled to adjust the cable-stayed angles and gaps of the fishway sections; the gradient error is corrected in real time through the tilt angle sensor; the distribution density and the opening-closing angle of the guide plates are dynamically adjusted according to the flow speed and the water depth, and vortex is inhibited; the water temperature change is monitored, the thermal deformation compensation amount is calculated, and deformation is absorbed through the elastic sealing assembly. The fish passing rate can be increased, the adaptability and stability of the structure are enhanced, and the device is suitable for complex hydrological environments.

The submarine cable laying robot comprises a main body frame, a buoyancy adjusting device is arranged at the top of the main body frame, spiral propellers are arranged on the two sides of the main body frame respectively, a cable pressing device and two spraying devices are arranged at the bottom of the main body frame, and the two spraying devices are symmetrically arranged at the bottom of the main body frame. The cable pressing device is arranged corresponding to the two spraying devices; the spiral propeller is used for driving the submarine cable laying robot to walk on the seabed, the buoyancy adjusting device is used for adjusting the buoyancy of the submarine cable laying robot on the seabed, and the two spraying devices are used for digging cable burying grooves with the corresponding depths in the corresponding positions of submarine cables in the mode of spraying high-pressure liquid. And the cable pressing device is used for pressing the cable into the cable burying groove. The device has the universality of different cable burying depth operations and the universality of different seabed geological operations, the operation efficiency and safety are improved, and the cost and the risk are reduced.

The invention relates to the technical field of storage tank sampling, and discloses a sampling detection device for a low-temperature tank and a sampling method.The sampling detection device comprises a low-temperature tank body and a liquid storage tank, the feeding end of the low-temperature tank body is communicated with the discharging end of the liquid storage tank through a pipeline, and the discharging end of the low-temperature tank body is sequentially connected with a buffer cylinder and a circulation assembly; as water flows into the buffer cylinder from the low-temperature tank body, when the interior of the low-temperature tank body is in a high-pressure state, the speed of the water flowing into the buffer cylinder can be increased through strong pressure, the main conveying pipe cannot discharge all the water in time instantly, and at the moment, buoyancy of the water enables the semi-floating ball to support the valve plate to ascend; therefore, the communicating position of the pressure relief sampling pipe and the second cavity is opened, a small part of water can flow to the circulating assembly from the pressure relief sampling pipe, the diameter of the pressure relief sampling pipe is smaller than that of the main conveying pipe, impurities in water flow are concentrated accordingly, and the highly-concentrated impurity distribution state is beneficial for being captured by the detection assembly and detected.

The invention discloses a water quality multi-depth sampling device for environmental monitoring, and belongs to the field of water quality sampling. A water quality multi-depth sampling device for environmental monitoring comprises a buoyancy ring, the inner wall of the buoyancy ring is fixedly connected with a bearing plate, the bottom of the bearing plate is fixedly connected with a sampling cylinder, the water quality multi-depth sampling device further comprises multiple sets of sampling rings, the sampling rings are rotatably connected to the sampling cylinder, and the sampling rings are arranged at equal intervals. The two sides of each group of sampling rings are fixed and communicated with sampling pipes, and the interior of the sampling cylinder is divided into a plurality of groups of sampling bins by sealing plates; the piston plate slides in the piston bin in a reciprocating manner, so that water samples at different depths are synchronously extracted and collected, and the sampling efficiency is improved; and the arrangement of a linkage gear and a linkage fluted disc is matched, so that the sampling pipe rotates around the sampling cylinder, water samples in different areas at the same height are collected, the sampling effect is improved, and the accuracy of a detection result is ensured.

The invention belongs to the technical field of aquaculture, and particularly relates to a liftable holothurian culture device which comprises a culture box. A pair of fixing frames is arranged on the side wall of the breeding box, hollow grooves are formed in the fixing frames, multiple groups of water inlet holes communicated with the hollow grooves are formed in the top surfaces of the fixing frames, and sealing mechanisms for sealing the water inlet holes are arranged on the fixing frames; a connecting groove is formed in the bottom surface of the breeding box; when the culture box needs to ascend, the sealing mechanism does not seal the water inlet hole any more, seawater enters a hollow groove from the water inlet hole to push a sliding plate, and meanwhile, a first spring pushes the sliding plate, so that gas in the hollow groove enters an elastic block through a gas inlet pipe under the pushing of the sliding plate, the elastic block is inflated and expanded, and the water inlet hole is opened; after the elastic block expands to a certain degree, the sealing assembly does not seal the end opening of the connecting groove any more, at the moment, the elastic block can make contact with seawater, and therefore the culture box is driven to ascend by means of buoyancy.

The invention provides an anti-typhoon gravity type net cage and a use method, and belongs to the technical field of deep sea cultivation, the anti-typhoon gravity type net cage comprises a second driving part, a winding disc, a first telescopic rod, a second telescopic rod, a flexible net and a stretching assembly; a sound wave generator is installed at the output end of the telescopic controller, a plurality of second telescopic rods are installed on the sound wave generator in the circumferential direction, a plurality of flexible nets are tightly arranged on the second telescopic rods in the radial direction, telescopic pieces are installed on the sides, away from the first telescopic rods, of the sound wave generator, and stretching assemblies are arranged at the output ends of the telescopic pieces. A plurality of side hooks and hook connecting pieces are installed on the stretching assembly, a weight box is installed at the bottom of the net cage, a water suction pump is arranged in the weight box, the sound wave generator and the flexible net descend to expel fish schools, the fish schools are gathered below the net cage, the floating body is deflated through a vent valve to reduce the buoyancy of the net cage, and the net cage is made to be horizontal with the sea level; impact of typhoon on the net cage is reduced; the gravity center of the net cage can be further lowered by arranging the weight box.

The invention discloses a buoy structure and a foundation structure suitable for a floating type wind turbine generator foundation, and the buoy structure comprises a distributed steel pipe frame which comprises a central steel pipe and peripheral steel pipes arranged around the central steel pipe; the end deck comprises an upper end deck and a lower end deck which are connected with the two ends of the distributed steel pipe frame respectively; the buoyancy module is made of glass fiber reinforced plastics and is formed by connecting a plurality of buoyancy units with a central steel pipe and a peripheral steel pipe in a layered manner, and each buoyancy unit is of a hollow watertight box body structure and is filled with a water pressure load or a solid pressure load; each buoyancy unit comprises a connecting pin connected with the central steel pipe, a through hole allowing the peripheral steel pipe to penetrate through and a skirt plate used for being connected with the adjacent buoyancy unit or the end deck, the connecting pins are arranged on the inner sides of the buoyancy units, the skirt plates are arranged on the outer sides of the buoyancy units, and connecting holes are formed in the skirt plates. The manufacturing and maintenance cost is effectively reduced, meanwhile, modular construction can be achieved, and the construction period is greatly shortened.

Embodiments disclosed herein include buoyant wave energy converters. In an embodiment, the wave energy converter comprises an upper chamber having a first fluid reservoir and a first gas pocket, and a lower chamber having a second fluid reservoir and a second gas pocket. An injection tube is between and fluidly coupled to the upper chamber and the lower chamber, where the injection tube is to impel a fluid from the second fluid reservoir into the first fluid reservoir when the upper chamber, the lower chamber and the injection tube oscillate about a waterline with the upper chamber adjacent to the waterline and the lower chamber below the waterline and vertically beneath the upper chamber. In an embodiment, an effluent tube is fluidly coupled to the upper chamber and the lower chamber, where the effluent tube is to return the fluid from the first fluid reservoir to the second fluid reservoir.

The invention provides a composite tension sand blocking and silt reducing facility and method.The facility is composed of one or more units, each unit comprises a floating body, a composite tension curtain and an anchor point located at the bottom of a water body, one end of the composite tension curtain is connected to the floating body, and the other end of the composite tension curtain is connected to the anchor point; the composite tension curtain forms a sand blocking surface in the water between the bottom of the water body and the floating body by virtue of the buoyancy of the floating body, and the floating body is positioned on the water surface or suspended in the water; the composite tension curtain is formed by sewing two layers of geotechnical cloth together, a plurality of steel cables are inserted between the two layers of geotechnical cloth, a composite tension structure is formed to serve as a sand blocking and silt reducing curtain face, and main water flow force and wave force are borne by the steel cables. The flexible sand blocking curtain structure facility is economical, convenient to construct, suitable for large flow velocity and wave conditions and capable of blocking sand and reducing silt.

The invention discloses a riverway water quality detection device, and relates to the field of water quality detection, the riverway water quality detection device comprises a support and a base fixedly installed at the upper end of the support, the base is provided with an air pump, the air pump is communicated with a floating box through an air inlet pipe I, the floating box is installed on the support in an up-down sliding manner, and the floating box is fixedly connected with water quality detection equipment; a deflation valve is installed at the upper end of the buoyancy tank, and a first drainage valve is installed at the lower end of the buoyancy tank. The riverway water quality detection device has the beneficial effects that the water depth position of the water quality detection device is adjusted by changing the underwater buoyancy of the buoyancy box, and a conventional lifting mechanism such as a transmission belt or a screw is not adopted to adjust the height, so that the riverway water quality detection device is not influenced by an underwater complex environment, and normal underwater lifting of the riverway water quality detection device is not influenced even if garbage is wound; the reliability and the stability of the riverway water quality detection device are greatly improved, and the failure rate is low.

According to the caisson wharf and the construction method thereof, a layered structure of a steel slag-rubber particle composite lower layer and a regenerated resin-basalt fiber composite upper layer is adopted for a base, and interface bonding is enhanced in combination with a silane coupling agent; the foundation bed is assembled by precast concrete modules and is poured by nano mortar; the caisson main body is provided with a positioning plate which is inserted into the guide groove, the caisson main body is filled with multi-graded steel slag fragments, and an independent airbag cavity is pre-buried in a bottom plate; the buoyancy control system dynamically adjusts the water injection rate based on multi-sensor data; the ecological permeable pipeline network adopts a diatomite-zeolite coating; the prestressed steel strand towing system is regulated and controlled in real time through the friction damper. The caisson wharf and the construction method thereof have the remarkable advantages in the aspects of structural stability, ecological friendliness, construction efficiency, intelligence and automation, the problems existing in a traditional caisson wharf can be effectively solved, and the requirements of modern port construction are met.

A chum bobber with a first member comprising an integrated buoyancy chamber and a first coupling apparatus and a second member comprising a chum chamber and a second coupling apparatus for physically coupling to the first coupling apparatus. The first and second coupling apparatus are adapted for coupling the first member and the second member and thereby trapping chum into the second member while isolating the chum from the first member.

According to the deep and far seawater suspension oil and liquid storage device and the underwater oil storage method thereof, a layered tank body structure is adopted, and a load adjusting cabin, a flexible oil storage cabin and a water storage cabin are arranged from top to bottom. The load adjusting cabin is used for dynamically adjusting the net buoyancy of the device through seawater feeding / discharging to reduce the load of the mooring system; the oil storage cabin adopts a flexible storage bag to adapt to volume change and is linked with the water storage cabin through a movable composite heat preservation partition plate, the partition plate comprises an active heating layer and a phase change material layer, when the oil temperature is too low, the active heating layer directionally heats crude oil, the phase change layer absorbs dissipated heat, latent heat is released during external low-temperature impact to buffer temperature drop, and dynamic temperature control is achieved. The device is moored and fixed through a gravity anchor, and multiple types of sensors are arranged to monitor the posture, stress, oil temperature and leakage state of the tank body in real time. The problems of oil storage tank deformation, high pour point oil heat preservation and mooring stability under the deepwater high-pressure environment are solved, and the device has the advantages of being low in construction cost, high in environmental adaptability and efficient in operation and maintenance and is suitable for safe storage and transportation of deep and far sea oil and gas resources.