147 results about "Moon pool" patented technology

Disclosed is a floating platform integrating wave attenuation with marine energy power generation and a working method thereof, the platform includes a breakwater, a tuned damping wave energy converter, and an offshore floating wind turbine. The breakwater includes double-cylindrical-boxes and connecting bulkheads, and a moon pool area is formed in a middle of the breakwater; the offshore floating wind turbine and the tuned damping wave energy converter are both connected to the breakwater through a connecting rod. A circular groove is formed on an inner side of each of the connecting bulkheads of the breakwater. The breakwater provides the floating base and power generation environment for the offshore floating wind turbine and the tuned damping wave energy converter, and a plurality of the tuned damping wave energy converters can be disposed, and are evenly distributed beneath the offshore floating wind turbine.

The invention relates to the technical field of ships, and discloses an ice flowing prevention device applied to a polar region ship moon pool, which comprises ice pushing manipulators, the ice pushing manipulators are arranged on the upstream and the downstream of the moon pool, and the ice pushing manipulators can push ice flowing to enable the ice flowing towards the moon pool to be far away from the moon pool; the underwater sound ice detector is mounted at the bottom of the ship, and the underwater sound ice detector can monitor position data of flowing ice in water relative to the ice pushing manipulator; the ice block crushers are installed at the positions, located on the upstream and the downstream of the moon pool, of the bottom of the ship, and the ice block crushers can crush flowing ice flowing to the ice block crushers; the ice stirring baffle is arranged at the bottom of the ship and located on the periphery of the moon pool, and when flowing ice flows through the ice stirring baffle, the flowing ice can be away from the moon pool along the outer surface of the ice stirring baffle; and the controller is electrically connected with the underwater sound ice detector, the ice pushing manipulator and the ice block crusher. Through the arrangement of the ice flowing prevention device, the flowing ice can be prevented from blocking the moon pool, and the flowing ice can also be prevented from colliding with underwater equipment.

The invention relates to a moon pool and platform coupled hydrodynamic calculation method and device, a medium and equipment. The method comprises the following steps: establishing a platform model without a moon pool; solving the space velocity potential of the flow field in the platform model; inputting physical attribute parameters of a mooring and riser system into the platform model, establishing a platform mooring system model, and completing initialization; solving wave force, mooring tension and riser acting force of each order borne by the platform model under the initial time step length; solving a platform coupling motion equation of the platform model, which does not contain the acting force of fluid in the moon pool, and obtaining six-degree-of-freedom motion displacement of the platform model; completing initialization of a flow field; assigning the six-degree-of-freedom motion displacement of the platform model as the six-degree-of-freedom motion of the overlapped grid region; solving nonlinear motion of a water body in the moon pool, and obtaining parameters including fluid pressure to obtain fluid acting force in the moon pool; and solving a time domain motion equation of coupling of the moon pool and the platform, and carrying out repeated iteration until the last step of time calculation is completed.

The invention discloses a vibration reduction device and method for fluid resonance in a deep sea FPSO moon pool, and the method comprises the following steps: 1, evaluating the geometric structure and fluid dynamic characteristics of the deep sea FPSO moon pool, the geometric structure comprises the size and shape of the moon pool, and the fluid dynamic characteristics comprise the flow velocity and direction of fluid in a set time period; calculating the resonant frequency of the fluid in the moon pool based on the geometric structure and the fluid dynamic characteristics by adopting a three-dimensional fluid dynamic simulation technology; and 2, based on the fluid dynamics data sample obtained through evaluation, the layout and configuration scheme of vibration reduction equipment is designed, and the vibration reduction equipment comprises at least three vibration reduction units. By accurately evaluating the geometric structure and fluid dynamic characteristics of the moon pool and adopting proper vibration reduction equipment, fluid resonance in the moon pool can be effectively reduced, so that the structural stability and safety of the FPSO are improved. And the resonance phenomenon is reduced, so that the structural fatigue is prevented, and the service life of the FPSO is prolonged.

The invention provides a moon pool bottom cover in-dock tightness test method and device, and the method comprises the following steps: S1, drawing an FRXX rib bit line on a port or a starboard of a dock bottom, the FRXX rib bit line being a center line in the width direction of a moon pool bottom cover; s2, the module vehicle is hoisted to the dock bottom, and steel plates and rubber sheets are laid in sequence; s3, the watertight tool box is hoisted to the module vehicle; s4, the height of the module vehicle is reduced to 1150-1200 mm, and the module vehicle enters along an FRXX rib position line; s5, the module vehicle generates lifting force to jack the watertight tool box, and a sealing rubber strip on the upper surface of the watertight tool box tightly presses the moon pool bottom cover to form a closed water pressure space; and S6, applying water pressure to the watertight tool box until the tightness test step is completed. The problems that the installation and debugging efficiency is low, and single-point stress is uneven are mainly solved. The moon pool bottom cover is directly transported, jacked and installed through the module vehicle, it is ensured that a tightness test is completed before the moon pool bottom cover is undocked, the moon pool bottom cover is completely installed, the precision meets the requirement, and the shipbuilding period is shortened.

Described herein is an offshore buoyant structure, a floating buoyant structure, and methods of loading and unloading a floatable wind turbine substructure. The offshore buoyant structure includes a split hull constructed and dimensioned in a manner to provide a long moon pool; and a floatable wind turbine substructure accommodated by the split hull and configured to receive a floating wind turbine with a portion of the floating wind turbine extending downwardly into the long moon pool such that relative motion between at least the offshore buoyant structure and the floatable wind turbine substructure or floating wind turbine when received by the floatable wind turbine substructure is minimized. The floating buoyant structure includes a split hull constructed and dimensioned in a manner to provide a long moon pool, the split hull is configured to accommodate a floatable wind turbine substructure or a floating wind turbine assembly and minimize relative motion therebetween.

The utility model provides an immersed tube foundation bed desilting platform convenient for rapid construction, which comprises a self-floating platform, a longitudinal moving trolley and a transverse moving trolley, a first moon pool is arranged in the middle of the self-floating platform, the longitudinal moving trolley is arranged in the first moon pool in a sliding manner, the transverse moving trolley is connected with the lower part of the longitudinal moving trolley in a sliding manner, and the moving directions of the transverse moving trolley and the longitudinal moving trolley are vertical. The dredging pipe is arranged in the transverse moving trolley in a penetrating mode and connected with the top of the longitudinal moving trolley through a connecting rope, the adjusting devices are arranged on the two sides of the longitudinal moving trolley in parallel respectively and connected with the adapters through the connecting ropes, the adapters are connected with the self-floating platform through first pull ropes, and the adjusting devices are used for adjusting the fixing positions and tensioning force of the connecting ropes. The dredging platform is compact in structure and simple in design, and stability and smoothness of the dredging platform in the moving process can be greatly improved.

The utility model discloses a deepwater lifting pipe-laying ship for a 3000-meter-water-depth double-pipe-laying system, a main ship body of the deepwater lifting pipe-laying ship is arranged to be of a three-layer continuous deck structure, and a bottom layer is a double-bottom layer and is used for arranging marine equipment; the middle layer is a freeboard deck and is used for arranging an S-Lay pipe laying area; the upper layer is a main deck and is used for arranging a J-Lay pipe laying area and a pipe stacking area; a full-rotation crane is arranged at the stern part of the main ship body; a moon pool is arranged in the middle of the main ship body, and a J-Lay tower is arranged on the upper portion of the moon pool. A living building and a helicopter platform are arranged at the bow part of the main hull; a plurality of full-revolving propellers, a plurality of telescopic propellers and a plurality of side propellers are arranged on the outer side face of the bottom of the main ship body. The deepwater lifting platform can continuously work at the water depth of 3000 meters, and is provided with an S-Lay pipe laying system and a J-Lay pipe laying system.

The present application belongs to the technical field of immersed tube tunnel construction. Disclosed are an integrated barge for gravel bed leveling and immersed tube sinking and mounting, and an immersed tube tunnel construction method. The integrated barge comprises a hull, a leveling device and an immersed-tube hoisting and lowering device, wherein the hull comprises two floating bodies and two cross beams; a space located below the cross beams and between the two floating bodies is configured to contain immersed tubes; a hollowed-out area enclosed by the two floating bodies and the two cross beams forms a moon pool; the leveling device comprises a traveling mechanism, a traveling trolley and a leveling actuation mechanism; the traveling trolley is flipped in a vertical plane relative to the traveling mechanism, such that the leveling actuation mechanism is switched between an operating state and a non-operating state; and the immersed-tube hoisting and lowering device is configured to be connected to the immersed tubes, which are located in the space below the cross beams, and to control the immersed tubes to be sunk and mounted. The integrated barge integrates the functions of gravel bed leveling and immersed tube sinking and mounting, and can thus effectively reduce the ship configuration on an immersed tube tunnel construction site, thereby improving the construction efficiency and reducing the construction cost.

The utility model relates to the technical field of ship design and manufacture, and discloses a hidden laying system of a mother ship of a deep-sea unmanned submersible vehicle, which comprises a servicing room, a hoisting room, a dock cabin and a moon pool, the servicing room is arranged in a main deck layer of the mother ship, the hoisting room is adjacent to the servicing room, a crane is arranged at the top of the hoisting room, a hoisting opening is arranged at the bottom of the hoisting room, and the dock cabin is arranged in the moon pool. The dock cabin is located below the hoisting room, the bottom of the dock cabin is lower than a waterline, the dock cabin is provided with a dock cabin hatch, the dock cabin hatch is provided with an upward moving type dock cabin ship side cabin door, the dock cabin ship side cabin door is provided with a dock cabin ship side cabin door transmission mechanism, a dock cabin arranging and loading system is further arranged in the dock cabin, the moon pool is located below the dock cabin, and a moon pool bottom cover is arranged at the bottom of the moon pool. And a moon pool bottom cover transmission mechanism is arranged on the moon pool bottom cover. According to the utility model, the concealed laying requirements under severe sea conditions and various navigation working conditions can be met, the safety of laying operation is improved, and the influence of external factors on laying operation is reduced.

The invention relates to a single-point mooring system, in particular to a design method of a hydraulic locking device of an FPSO single-point mooring system, which comprises the following steps: S1, mounting a guide frame assembly; s2, the sliding shoe assembly is installed in the guide frame assembly; s3, the supporting assembly is assembled; s4, the fixing assembly is installed on the supporting assembly; s5, the locking assembly is installed between the guide frame assembly and the supporting assembly; s6, the supporting assembly is positioned and installed on the deck; s7, tie-back of the buoy from the mouth of the moon pool; s8, releasing the buoy from the mouth of the moon pool; the device has high efficiency, flexibility, stability, safety, strong adaptability, durability, reliability, safety and maintainability, is optimized in structure and easy to operate, and provides an efficient, stable and safe solution for mooring operation in ocean engineering.

The invention relates to a multipurpose polar region moon pool folding and unfolding system. A working platform is arranged on a ship body frame at the top of a moon pool cabin; the lifting winch and the umbilical cable winch are arranged on the working platform, the ROV track is arranged on the cabin wall on one side of the moon pool, and the ROV tackle is installed on the ROV track through idler wheels and moves up and down in the ROV track. The CTD track is arranged on the bulkhead on one side of the moon pool, and the CTD tackle is mounted on the CTD track through rollers and moves up and down in the CTD track; the guide joint is connected with an ROV hoisting winch through two cables; the device is used for butt joint and release with an ROV on a deck or under water. The CTD tackle is provided with a turnover oil cylinder, and the working state and the storage state of the ROV tackle are changed through stretching and retracting of the turnover oil cylinder. The tower lock is arranged at the lower part of the working platform and is used for storing and maintaining the ROV tackle and the ROV guide joint; and the underwater HPU is respectively used for driving the mechanism on the guide joint and the mechanism on the CTD tackle to act.

The invention belongs to the technical field of ships, and discloses an energy dissipation device, a moon pool and a ship, the energy dissipation device is used for being arranged on the inner wall of the moon pool of the ship, and the energy dissipation device comprises a buffer plate arranged in the vertical direction and parallel to the inner wall of the moon pool; the perforated plate is arranged on the surface, deviating from the inner wall of the moon pool, of the buffer plate and is parallel to the buffer plate, a plurality of through holes for fluid to pass through are formed in the perforated plate, and each through hole penetrates through the perforated plate in the direction perpendicular to the buffer plate; the turbulent flow assembly is arranged on the face, away from the buffer plate, of the perforated plate and used for conducting flow guiding and dispersing on shaking fluid in the moon pool, the perforated plate is used for dissipating energy of the dispersed fluid, and the buffer plate is used for dissipating energy of the fluid penetrating through the perforated plate. According to the energy dissipation device, energy generated by fluid sloshing in the moon pool can be effectively dissipated, the amplitude and impact force of fluid sloshing are restrained, vibration and noise of equipment are reduced, and the safety, stability and safety of the equipment are improved.

The invention discloses a seabed collection system and a collected object lifting method. Belongs to the technical field of underwater collection. The seabed collection robot collects a seabed target collection object; the water surface support ship is communicated with the seabed acquisition robot through the pipe cable system; the seabed collecting robot conveys collected objects to the water surface supporting ship through the pipe cable system serving as a guide cable. According to the buoyancy principle, the air bag is inflated to enable the buoyancy of the target collected object collecting net bag to be larger than the gravity to achieve automatic floating; a pipe cable system is combined to serve as a floating cableway, and a net bag fully loaded with collected objects can be lifted to a moon pool of a water surface supporting ship. The system also adopts an intelligent automatic control technology, and automatically completes the inflation and replacement of a net bag and the recovery of collected objects through the cooperation of an underwater mechanical claw and an on-board collection mechanical claw. The device is suitable for seabed collected objects which have high requirements on the lifting process and are sensitive to impact force, and the working efficiency and the continuity of the system can be greatly improved.

The present invention relates to the technical field of unmanned ship navigation control systems, in particular to an unmanned scientific research ship equipped with an intelligent navigation control system, including an unmanned ship body. The unmanned ship body is successively provided with a bow peak tank, an instrument and equipment compartment, a moon pool compartment, a rear battery compartment, an engine room, and a stern compartment from the bow to the stern. A front battery compartment is provided below the instrument and equipment compartment, and fuel tank compartments are provided on both sides of the front battery compartment. It also includes an intelligent navigation control system; and a mother ship / shore-based remote control monitoring platform for issuing commands to the intelligent navigation control system, and receiving and displaying and intervening in the monitoring data of the dual-mode semi-submersible unmanned ship in real time; a safety environment perception unit is constructed to ensure the long-term autonomous, safe and stable operation of the integrated carrier platform under various sea conditions in the deep sea and ocean, and can realize the autonomous avoidance of marine obstacles to ensure the navigation safety of the unmanned ship.

The utility model discloses an inspection unmanned ship for monitoring the activity of seawater nuclides, which belongs to the technical field of nuclide monitoring and comprises a carrier platform (1), a propulsion system (2), a control system (3), a camera (4), a communication system (5), a battery energy system (6), a megaphone (8), a warning lamp (9), a maritime radar (10), an obstacle avoidance radar (11), a working moon pool (12), a searchlight (13), nuclide monitoring equipment (14) and the like. According to the utility model, an oil-electricity hybrid mode is adopted, so that the carbon emission can be reduced, and the cruising mileage can be guaranteed; according to the obstacle avoidance system, various sensors such as maritime radar, camera vision, radar and AIS are adopted for sensing fusion, and obstacle avoidance accuracy is provided; and an unmanned inspection mode is adopted, so that the inspection efficiency can be effectively improved, monitoring data information is provided, and life health and safety of workers are guaranteed.

The application belongs to the technical field of ships, and discloses an energy dissipation device, a moon pool and a ship. The energy dissipation device is arranged on the inner wall of the moon pool of the ship and comprises a buffer plate arranged in the vertical direction and parallel to the inner wall of the moon pool, a perforated plate arranged on the side of the buffer plate away from the inner wall of the moon pool and parallel to the buffer plate, a plurality of through holes for fluid passing being arranged on the perforated plate, each through hole penetrating the perforated plate in the direction perpendicular to the buffer plate, and a turbulence assembly arranged on the side of the buffer plate away from the perforated plate and used for guiding and dispersing the sloshing fluid in the moon pool. The perforated plate is used for dissipating the energy of the dispersed fluid, and the buffer plate is used for dissipating the energy of the fluid passing through the perforated plate. The energy dissipation device can effectively dissipate the energy generated by the fluid sloshing in the moon pool, suppresses the amplitude and impact force of the fluid sloshing, reduces the vibration and noise of the equipment, and improves the safety, stability and safety of the equipment.

The invention discloses a floating breakwater based on a wave flow conversion effect. The floating breakwater comprises a plurality of partition boxes, and a wave flow conversion assembly is fixedly arranged between every two adjacent partition boxes; the wave flow conversion assembly comprises transition sections, a circular channel and blades, the two transition sections are arranged at the two ends of the partition box, and the upper surface and the lower surface of each transition section are each provided with a floating structure; a circular channel is formed in the transition section, blades are arranged in the circular channel, and the blades are connected with a generator set arranged on the upper surface of the partition box; the area between the two transition sections serves as a moon pool, and the bottom of the moon pool is communicated with an external fluid domain; by means of the gathering effect of the transition section, waves around the floating breakwater are gathered and enter the moon pool through the blades via the circular channel, the circular channel is used for converting the waves into water flow and achieving wave flow conversion, the water flow in the circular channel drives the blades to rotate, then the generator set is driven, and kinetic energy of the water flow is converted into electric energy. The wave absorbing device can achieve conversion from waves to water flow, and wave absorbing is achieved.

The embodiment of the invention provides an offshore platform mining equipment transfer system. The offshore platform mining equipment transfer system comprises a first ore collecting car, a second ore collecting car, a transfer platform, a transfer gantry crane and traction equipment. The transfer platform, the first mine collecting car and the second mine collecting car are arranged below a main deck of the offshore platform; the transfer platform is located between the first ore collecting car and the second ore collecting car along the width direction of the offshore platform, and the transfer gantry crane is arranged on the upper side of the transfer platform in the gravity direction and used for hoisting the first ore collecting car and the second ore collecting car to the surface of the transfer platform. The traction equipment is detachably connected to the first mine collecting car or the second mine collecting car, and the first mine collecting car or the second mine collecting car is lowered to an underwater target position through the moon pool. The problems that in the prior art, the overall gravity center of an offshore platform is high, and the stability and the wind resistance of the platform are poor are solved.

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

The invention relates to an umbilical cable terminal, in particular to an underwater installation method for an oversized umbilical cable terminal, which comprises the following steps: S1, carrying out operation preparation for laying the tail end on a deck; s2, a crane hoists the umbilical cable terminal UTA out of a cabin; s3, enabling the umbilical cable terminal UTA to pass through a cone pulley; s4, hanging the umbilical cable terminal UTA in the moon pool; s5, the tail end of the umbilical cable terminal UTA is lowered in place; according to the method, the umbilical cable terminal UTA is transferred out of a cabin by connecting the crane with the bending limiting device out-of-cabin rigging, and then cone pulley passing operation is carried out under the cooperation of the crane and the pull-back winch; and the load is transferred to the winch from the crane, the winch is connected with the hump rigging on the bending limiting device through the sling reserved on the UTA fixing piece, and finally UTA in-place is completed under the cooperation of the crane, the winch and a ship navigation bridge. The whole construction team is coordinated and matched, most work is completed mechanically through the steps, the operation risk is reduced, and operation can be completed efficiently.

The invention provides a deepwater flexible pipe laying ship with a vertical laying system, which is characterized in that a reel pipe coil chamber is arranged in a cabin of a ship body, at least one transverse cable reel pipe coil is arranged in the reel pipe coil chamber, and each cable reel pipe coil is connected with a reel driver; a cable through hole and a cable guide mechanism are mounted on the upper surface of the main deck; a set of vertical laying system is installed on the upper surface of the main deck, the vertical laying system comprises a vertical supporting frame erected on the main deck, a conveying pulley is installed at the top of the vertical supporting frame, and the conveying pulley is connected with a pulley driver; the ship body is provided with a working moon pool which downwards penetrates from the main deck to the ship bottom, a cable wound on the cable reel pipe disc penetrates through the cable through hole and is connected and conveyed to the vertical laying system through the cable guide mechanism, and the cable downwards penetrates through the working moon pool through the conveying pulley and is laid underwater. The reelpipe is coiled in the cabin body, so that the gravity center height of the ship can be reduced while the loading capacity is improved, and the economic benefit and the operation safety are further improved.

The application discloses a kind of deep sea FPSO moon pool fluid resonance damping equipment and method, comprising the following steps: step one, assess the geometric structure of deep sea FPSO moon pool and its fluid dynamics characteristics, the geometric structure includes the size and shape of moon pool, the fluid dynamics characteristics include the flow rate and direction of fluid in a set period, adopt three-dimensional fluid dynamics simulation technique, calculate the resonance frequency of fluid in moon pool based on the geometric structure and fluid dynamics characteristics;Step two, based on the fluid dynamics data sample obtained by evaluation, design the layout and configuration scheme of damping equipment, the damping equipment includes at least three damping units. By accurately evaluating the geometric structure of moon pool and fluid dynamic characteristics, and using suitable damping equipment, the fluid resonance in the moon pool can be effectively reduced, thereby improving the structural stability and safety of FPSO. Reducing resonance phenomenon helps to prevent structural fatigue and prolong the service life of FPSO.

The application relates to the technical field of ocean engineering equipment, and discloses a launching device of an underwater vehicle and a control method thereof. The launching device of the underwater vehicle comprises a first lifting group and a second lifting group. The first lifting group comprises a plurality of first pile legs which are arranged at intervals along a first direction, the first pile legs are slidingly arranged on one side wall of a moon pool along a vertical direction, and the lower ends of the first pile legs are rotationally provided with crosspieces. The second lifting group is arranged at intervals along a second direction with the first lifting group, the second lifting group comprises a plurality of second pile legs which are the same in number as the first pile legs, the second pile legs are arranged at intervals along the first direction, the second pile legs are slidingly arranged on the other side wall of the moon pool along the vertical direction, and the lower ends of the second pile legs are provided with supporting plates. One crosspiece can be lapped on one supporting plate, so that the plurality of crosspieces form a bearing surface capable of bearing the underwater vehicle. The launching device of the underwater vehicle is accurate in positioning, stable in operation, efficient and convenient, and can adapt to complex marine environments.

This application discloses an offshore floating semi-submersible platform and an offshore power generation system. The offshore floating semi-submersible platform provided by this application includes a platform body equipped with wind turbine components and photovoltaic components to achieve wind and solar complementary power generation. A heave assembly is provided below the platform body, which includes at least two different sizes of heave plates and forms at least two moon pool structures, which together constitute a damping coupling system. The differentiated heave plates provide a graded response to broadband waves, and the moon pool structure adds additional mass and radiation damping, thereby continuously consuming wave energy, significantly reducing the platform's heave response, and improving operational stability. The photovoltaic components include fixed photovoltaic panels and telescopic photovoltaic panels. The fixed photovoltaic panels are located on the top surface of the platform body, and the telescopic photovoltaic panels can switch between a retracted state and an extended state, effectively increasing the photovoltaic power generation area and improving power generation efficiency.

The present invention discloses an outboard moon pool for use in polar crushed ice areas in the field of ship technology. The invention comprises an alloy frame for protecting the stability of the device structure, a floating material for providing buoyancy to the device is arranged inside the alloy frame, and a plurality of telescopic rods are arranged outside the alloy frame. The invention has a simple structure and is easy to operate. The alloy frame and the floating material work together to limit the crushed ice area to create a certain range of ice-free areas. The expansion assembly and the telescopic rod work together to increase the water depth of the moon pool device, thereby solving the problem of difficulty in placing and recovering scientific research equipment in the crushed ice area.

The invention relates to a moon pool tower lock device for fixing an ROV guide connector, which comprises a connecting rod, a spring bolt, a telescopic oil cylinder, an oil cylinder swing frame, a connecting rod swing frame and a proximity switch, and is characterized in that the telescopic oil cylinder is used as a power source of the tower lock device, is connected with the oil cylinder swing frame, and pushes the spring bolt I connected to the oil cylinder swing frame to rotate through extension of an oil cylinder rod; the oil cylinder swing frame is hinged to a lever of the telescopic oil cylinder and connected with the connecting rod, and the first spring bolt is installed on the oil cylinder swing frame and rotates along with the oil cylinder swing frame; the connecting rod is hinged to the oil cylinder swing frame and connected with the connecting rod swing frame at the same time to transmit movement of the telescopic oil cylinder. The connecting rod swing frame is connected with the connecting rod, and the second spring bolt is installed on the connecting rod swing frame and rotates along with the connecting rod swing frame; and the proximity switch is used for judging whether the tower lock is opened and closed in place. According to the moon pool tower lock device for fixing the ROV guide connector, locking of equipment such as the guide connector can be achieved, the equipment stability is high after long-term use, the operation risk is reduced, and personnel safety is guaranteed.

The invention discloses a tuned mass damping device for a cylindrical FPSO (floating production storage and offloading), and belongs to the technical field of damping shock absorption, the tuned mass damping device comprises an FPSO main body, an annular sleeve and a damper, the annular sleeve is arranged on the outer side of the FPSO main body, the damper is arranged between the FPSO main body and the annular sleeve, the FPSO main body comprises a platform moon pool, a conical heaving plate and a first hanging lug, and the first hanging lug is arranged on the platform moon pool. The conical heaving plate is arranged below the platform moon pool, and the first hanging lug is arranged above the conical heaving plate. According to the tuned mass damping device for the cylindrical FPSO, the waterplane width of the whole structure can be increased, and therefore the swinging motion of the FPSO body is further restrained.

The invention discloses a semi-submersible floating fan foundation with moon pool structures, which comprises a plurality of buoys, the center of each buoy is of a hollow moon pool structure, the top of each buoy is provided with a cover plate used for sealing the top of each moon pool structure, and a closed air cabin is formed above the moon pool; the buoys are supported and connected through supporting structures to form a foundation platform. The closed air cabins are formed above the moon pool, and when the buoy swings, air in the air cabin on one side is compressed to generate positive pressure, negative pressure is generated on the other side to generate restoring torque, so that the swinging amplitude of the foundation platform is further reduced through the restoring torque while the moon pool has the characteristics of itself, and meanwhile, the swinging amplitude of the foundation platform is further reduced through the restoring torque. The vibration water column characteristic of the moon pool and the aerodynamic characteristic of the air cabin are combined with the dynamic characteristic of the structure of the semi-submersible fan foundation, so that the inhibition capacity on low-frequency and high-frequency waves is enhanced, the widely applicable stabilization effect is achieved, and the stability of a foundation platform is further improved.

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