42 results about "Single point mooring" patented technology

A floating photovoltaic system (1) comprising a flotation unit (100) and a mooring system (30), wherein the flotation unit (100) comprises at least one sail (2) having at least one vertical or near vertical photovoltaic panel (20) mounted on a mast (3) and supported on a base (5), wherein the base (5) further comprises at least one buoyancy element (10); and wherein the mooring system (30) comprises a single point mooring buoy (32) connected to at least one buoyancy element (10) or the base (5) via mooring lines (33), and at least one mooring line (34) from the single point mooring buoy (32) tethered to at least one anchor point (36).

The application discloses a kind of single-point mooring chain and anchor chain disc connection damage monitoring and inhibiting device and method, it is related to the inner turret type single-point mooring safety monitoring and protection technical field, the device is set in the tower body structure under the turret of the inner turret type single-point mooring system, including: motion measurement module, contact load measurement module, mooring chain measurement module, collaborative control module and inhibiting drive module, motion measurement module is used to obtain the motion characteristics of turret;Contact load measurement module is used to measure contact interface load and wear amount;Mooring chain measurement module is used to obtain chain body posture and tension;Collaborative control module carries out damage grade determination and instruction output;Inhibiting drive module executes pre-tightening force adjustment, mechanical locking and wear compensation to realize hierarchical inhibition.The application solves the problem of insufficient in-situ monitoring capability of contact interface in the prior art, lack of active inhibition means, realizes in-situ perception, intelligent determination and hierarchical inhibition of intelligent control of the damage of mooring chain and anchor chain disc connection.

The invention relates to the technical field of ocean energy development and utilization, in particular to a soft rigid arm single-point mooring wave energy power generation device which comprises a floating structure, a mooring support, a hinge power generation module, a mooring leg, a mooring arm, a column hinge shaft and a mooring tower. One end of the mooring leg is connected to the mooring support through one hinge power generation module, the other end of the mooring leg is connected to the lower end of the mooring arm through the other hinge power generation module, the upper end of the mooring arm is connected to the mooring tower through a column hinge shaft, and the mooring tower is fixedly installed on a seabed. The six-degree-of-freedom motion of the floating body can be subjected to energy capture, so that wave energy is converted; the flexible rigid arm single-point mooring system can adapt to the change of the wind wave direction and comply with the weather cock effect; the soft rigid arm single-point mooring system not only can position the wave energy power generation device, but also can convert wave energy, that is, the soft rigid arm single-point mooring system also has a wave energy conversion function.

A high-voltage electrical power supply line for the provides a secure and water-proof connection transfer of high-voltage electricity through an inner high-voltage electrical cable between a single point mooring (SPM) buoy and / or a caternary anchor leg mooring (CALM) buoy and an LNG vessel moored to the SPM CALM buoy, with a secured connection on each end of the high-voltage electrical cable, disallowing and prevent current flow through high-voltage electrical cable until a secure and confirmed connection is established between connectors attaching the high-voltage electrical power supply line to the SPM CALM buoy and the LNG vessel.

The invention relates to the technical field of ocean engineering, and discloses a self-propelled fishery breeding platform with variable aquaculture water volume, which comprises a single-point mooring system (9), a ship-shaped main body structure of the self-propelled fishery breeding platform is a double-bottom double-side structure, and a plurality of groups of aquaculture net cages (2) with variable water volume are symmetrically arranged on the left side and the right side of the self-propelled fishery breeding platform; the scissor type arm-extending buoyancy tanks (3) rotationally connected with the main ship body support the fishing net trusses (4) to form the outer side boundary of the culture net cage (2); a single-point mooring system (9) is arranged at the head of the platform, and a fishery catch cold storage area (6), a living area (7) and a propelling system (8) are arranged at the tail of the platform. The scissor-type arm-extending buoyancy tanks are arranged in the breeding net cage areas on the two sides of the platform main hull and connected with the fishing net trusses, when the scissor-type arm-extending buoyancy tanks are opened, the fishing net trusses are driven to extend out of the two sides of the platform main hull together with flexible fishing nets at the bottom, the water volume of the breeding net cages is enlarged, and the breeding capacity of fishery products is improved.

The utility model relates to single point mooring field especially based on fluid transfer structure of single point mooring system, including symmetrical distribution's lower valve body, the inside center of lower valve body is equipped with round groove, the upper side of lower valve body is equipped with upper valve body, the upper side fixedly equipped with the integrated mounting box of upper valve body, the inside of mounting box is equipped with fixed connection's locating post, the inside of round groove is equipped with the valve core of rotation connection, the utility model discloses the device body is connected with fluid transmission pipeline, when the sea is rough, first pipeline place starts to break first, two lower valve bodies are far away from each other after the break of first pipeline, make the installation strip in two mounting boxes all from another mounting box and draw out, the rack and spur gear engagement drive spur gear rotation 90 degrees simultaneously, thereby drive valve core rotation degree closes transmission passage, make the device realize the self -lock of pipeline break -down under the condition of no power, further reduce the loss caused when fluid transmission pipeline damage.

The invention relates to a floating foundation for wind turbine generators and a method for installing a wind turbine generator on top of and performing maintenance on said foundation. The floating foundation includes a tower and two support legs pivotally connected to the tower, forming a tripod-like structure. The floating foundation may include hydrodynamic damping elements and a single point mooring system leaving the foundation free to weathervane. The invention also relates to a method for using the structure as a crane, lowering and raising the turbine platform against and from e.g. a service barge during maintenance or assembly.

The utility model discloses a kind of high-stability corrosion-resistant single-point mooring ultra-thin wall bearing devices, including outer ring body, reinforcing support plate inner wall middle position is equipped with oil filler, and reinforcing support plate inside upper and lower edge is equipped with splicing slot, splicing slot inner wall is inserted and is installed with mounting block, and mounting block one side is rotatably embedded and installed with sliding bead, mounting block and reinforcing support plate one side are inserted and installed with first fixed bolt.This kind of high-stability corrosion-resistant single-point mooring ultra-thin wall bearing device can be side supported by reinforcing support plate, and can be stably rotated by sliding bead, mounting block, and the effect is good, and high-efficiency corrosion-resistant treatment can be carried out by the zirconia ceramic ball material quality of ball and the double-layer structure of nano ceramic coating and organic fluorocarbon coating coating, can adapt to complex marine environment, and high-efficiency heat dissipation can be carried out while being fixed by bolt seat, heat-conducting block and second fixed bolt, and the effect is good.

The invention discloses a single-point mooring system liquid slip ring sealing performance testing device, which belongs to the technical field of sealing performance testing and comprises a supporting and positioning mechanism, and a single-point mooring system liquid slip ring to be tested is placed on the supporting and positioning mechanism. The device further comprises a swing driving mechanism, a lifting driving mechanism and a rotation driving mechanism. The lifting driving mechanism is mounted above the swinging driving mechanism, and the rotating driving mechanism is mounted above the lifting driving mechanism; a supporting part of the supporting and positioning mechanism is mounted above the rotary driving mechanism, and a positioning part of the supporting and positioning mechanism is mounted on the side surface of the lifting driving mechanism; the device further comprises a sealing performance testing mechanism and a simulation dynamic control system. According to the device, oscillation, heaving and falling of the to-be-tested liquid slip ring of the single-point mooring system on the sea are simulated through the swing driving mechanism, the lifting driving mechanism and the rotation driving mechanism respectively, the working state of the liquid slip ring of the single-point mooring system during offshore operation is fully restored, and the test result of the liquid slip ring of the single-point mooring system is more accurate.

The invention discloses an active yaw control method of a multi-impeller floating type wind generating set and related equipment. The active yaw control method comprises the steps that the incoming flow wind direction and the real-time azimuth angle and the motion state of a floating type platform are monitored in real time or periodically; filtering or state estimation processing is carried out on the real-time azimuth angle of the floating platform to filter out high-frequency oscillation components induced by waves, and an estimated azimuth angle reflecting the average yaw attitude of the floating platform is obtained; determining a target azimuth angle of the floating platform according to the incoming flow wind direction, and calculating a deviation angle between the estimated azimuth angle and the target azimuth angle; when the deviation angle exceeds a preset threshold value, according to the deviation angle and the environmental disturbance influence, generating a rotating torque control instruction used for driving the floating platform to rotate around the single-point mooring system; according to the rotation torque control instruction, at least one propeller installed on the floating type platform is controlled to generate thrust so as to drive the floating type platform to rotate till the deviation angle is reduced to be within a preset threshold value. The invention aims to realize quick, accurate and cooperative yaw control in the multi-impeller floating type fan, avoid the adoption of a complex and heavy independent yaw mechanism and inhibit the influence of wave disturbance on the yaw precision.

The invention discloses an underwater leveling method for a single-point jacket. The underwater leveling method for the single-point jacket comprises the steps that the single-point jacket is hoisted in place underwater, and four sleeves connected with the jacket are inserted into a seabed; steel piles are inserted into four sleeves connected to the single-point jacket at intervals correspondingly, and the single-point jacket is preliminarily positioned; the lowest point position of the single-point jacket in the horizontal direction is measured, and the leveler is inserted into the steel pile of the sleeve at the lowest point position; a leveling oil cylinder of the leveler is clamped on a horn mouth of the sleeve; the leveling oil cylinder retracts according to the distance between the lowest point position and the highest point position, and the sleeve is lifted; after the lowest-point sleeve is lifted, the levelness of the single-point jacket in the horizontal direction is measured again, and the lowest-point sleeve measured for the second time continues to be lifted; measuring the levelness of the single-point jacket to meet the design requirement, and recycling the leveler. According to the underwater leveling method for the single-point jacket, the leveling efficiency and the leveling precision can be improved, and dependence on divers is avoided.

The invention discloses a single-point mooring system liquid slip ring mounting and testing device, which belongs to the technical field of ocean engineering equipment testing and comprises a single-point mooring system rotary table and a liquid slip ring concentrically and rotatably mounted at the center of the single-point mooring system rotary table. The synchronous transmission mechanism is used for movably connecting the rotary table of the single point mooring system with the liquid slip ring; the synchronous transmission mechanism comprises a stand column vertically fixed to the table top of the rotary table of the single-point mooring system, a driving arm horizontally and rotationally installed on the stand column and a driving plate fixedly connected with the edge of the liquid slip ring and rotationally installed at the end away from the stand column. According to the device, high-precision synchronous rotation of the rotary table and the liquid slip ring is achieved through the synchronous transmission mechanism, motion jamming or structural damage caused by desynchrony is avoided, meanwhile, local stress concentration is relieved through structural optimization, and long-term reliable operation of the system is guaranteed.

The application discloses a kind of single-point mooring chain and anchor chain disc connection damage monitoring and inhibiting device and method, it is related to the inner turret type single-point mooring safety monitoring and protection technical field, the device is set in the tower body structure under the turret of the inner turret type single-point mooring system, including: motion measurement module, contact load measurement module, mooring chain measurement module, collaborative control module and inhibiting drive module, motion measurement module is used to obtain the motion characteristics of turret;Contact load measurement module is used to measure contact interface load and wear amount;Mooring chain measurement module is used to obtain chain body posture and tension;Collaborative control module carries out damage grade determination and instruction output;Inhibiting drive module executes pre-tightening force adjustment, mechanical locking and wear compensation to realize hierarchical inhibition.The application solves the problem of insufficient in-situ monitoring capability of contact interface in the prior art, lack of active inhibition means, realizes in-situ perception, intelligent determination and hierarchical inhibition of intelligent control of the damage of mooring chain and anchor chain disc connection.

The utility model discloses a single-point mooring oil transportation relay system which comprises an oil tanker pump, a relay pump station and a delivery pipe. And the tanker pump is arranged on the tanker. The relay pump station is arranged between the mooring point and the coast. The relay pump station is used for increasing the oil conveying pressure. The delivery pipe is divided into two sections, one end of the first delivery pipe section is connected with the tanker pump, the other end is connected with the relay pump station, one end of the second delivery pipe section is connected with the relay pump station, and the other end is connected with the shoreside storage tank. The rear half of the conveying pipe is pressurized through the booster pump station, and then the conditions that the tail end of the conveying pipe is insufficient in pressure and low in oil conveying efficiency due to the fact that the conveying pipe is too long are improved.

The invention relates to the technical field of ocean engineering, and discloses an oil tanker efficient lightering system and method based on single-point mooring. A real-time dynamic monitoring module, a multi-dimensional data collection module, a multi-dimensional data analysis module, an anti-storm enhancement module, a multi-ship collaborative lightering module, a liquid tank sloshing suppression module, a mooring point optimal configuration module, an oil tanker type adaptation sub-module, an emergency response sub-module, a green energy-saving sub-module and a control module are established. The real-time dynamic monitoring module monitors port hydrological dynamic data, meteorological condition dynamic data and dynamic data of oil tanker positions and ship states, and the multi-dimensional data collection module collects oil tanker feature data, mooring equipment feature data and static data related to the surrounding environment of an oil tanker. The multi-dimensional data analysis module outputs the cooperative bearing capacity of multiple oil tankers, the dynamic safety distance between the oil tankers, the sloshing energy needing to be restrained by oil tanker liquid tanks and the optimal mooring point position, comprehensive evaluation is carried out, and the control module achieves oil tanker lightering operation automation.

The invention relates to the field of wind power generation, in particular to a double-impeller-unit floating type wind power single-point mooring system which comprises a floating type foundation, a first wind turbine unit, a second wind turbine unit and a single-point mooring device, the floating type foundation comprises a main stand column and a V-shaped support connected with the main stand column, and the first wind turbine unit and the second wind turbine unit are separately installed at the top of the V-shaped support; the mooring device comprises an inner rotating tower, a main bearing, an anchor chain disc and an anchor chain, a mounting groove is formed in the bottom of the lower floating box, the inner rotating tower is arranged in the mounting groove, the anchor chain disc is fixedly connected with the bottom of the inner rotating tower, one end of the anchor chain is connected with the anchor chain disc, and the other end of the anchor chain is fixed to a seabed. An inner ring of the main bearing is connected with the inner turret, an outer ring of the main bearing is connected with the turret supporting ring, and the floating foundation rotates relative to the inner turret through the turret supporting ring and the outer ring of the main bearing. The floating type foundation can rotate around the mooring point, it is guaranteed that the wind turbine generator can face wind freely, a generator yaw system is omitted, and the fault rate of the generator is reduced.

The utility model discloses a soft steel arm connecting device of a single point mooring system, and relates to the technical field of soft steel arm connecting devices, the soft steel arm connecting device comprises two connecting end seats, the outer walls of one sides of the two connecting end seats are respectively provided with a guide frame and an inner connecting guide rod in a welding mode, and the inner connecting guide rod is connected with the guide frame in a welding mode. The inner connecting guide rod is movably connected with the guide frame in a sleeving manner; the internal connection sliding block is movably arranged in the guide frame, the internal connection sliding block and the internal connection guide rod are of an integrated structure, supporting rollers are arranged in grooves in the upper end and the lower end of the internal connection sliding block, and the internal connection sliding block is in rolling connection with the inner wall of the guide frame through the two supporting rollers; the problems that the stability of an existing soft steel arm connecting structure in the using process is improved through an arranged damping mechanism, but the connecting structure cannot be movably adjusted according to the field environment in the using process, so that the soft steel arm cannot adapt to the fluctuating environment of the sea surface to be installed are solved.

The invention provides an outer turret type single-point mooring device for an offshore floating type power generation platform, and relates to the technical field of ocean engineering equipment, the outer turret type single-point mooring device comprises a floating type platform, an inner tower, an outer tower, an adjustable anchor chain mechanism, a sealing cover, a rotary supporting mechanism, a winch and a guide wheel; the invention has the characteristics of reasonable and simple structure, low production cost and convenience in installation, through the design of the split inner tower and the outer tower, the upper and lower rotary support structures are matched to form stable movable connection, 360-degree omnidirectional rotation can be realized, multidirectional sea conditions can be flexibly adapted, the platform is prevented from stress overload due to ocean current and wind direction changes, and the service life of the platform is prolonged. Meanwhile, a complex buoy and a quick release mechanism of a traditional system are omitted, the production and construction cost is reduced, and the modular component design facilitates later installation and maintenance; a multi-sealing structure is formed through multiple groups of sealing rings, seawater and silt can be effectively prevented from invading the rotary supporting mechanism, corrosion and abrasion of parts are reduced, and the service life of equipment is prolonged.

This invention relates to the field of bearing testing technology, specifically a method for marine testing of the main bearing of a catenary single-point mooring system. The method includes measuring the axial and radial clearance of the main bearing. A magnetic gauge holder is attached to the upper surface of the inner ring of the main bearing, and a dial indicator is placed against the upper surface of the outer ring. A hydraulic cylinder lifts the rotating part to measure the axial clearance of the main bearing. A magnetic gauge holder is also attached to the upper surface of the outer ring of the main bearing, and a dial indicator is placed against the inner diameter surface of the inner ring. A first chain hoist, a first force gauge, a second chain hoist, and a second force gauge are arranged radially along the same path as the magnetic gauge holder and dial indicator. The radial clearance of the main bearing is then measured. This method enables testing and evaluation of the catenary single-point mooring system while it is in service. Replacement parts and maintenance tools can be prepared based on the test results without downtime, shortening the downtime cycle of the catenary single-point mooring system and significantly reducing losses caused by downtime.

The utility model provides a double-unit floating type wind power generation system of an active synchronous yaw system, relates to the technical field of wind power generation, and aims to solve the technical problems of low wind energy capturing efficiency, short service life, concentrated risk and serious accident consequence due to the fact that a floating type double-wind-power-unit system adopts a single-point mooring system for positioning in the prior art. The two wind power generation systems collect wind energy at the same time, convert the wind energy into electric energy and transmit the electric energy to an ashore variable electric field through a submarine cable, wind speed sensors of the two wind turbine generators detect the wind speeds of the two wind turbine generators respectively, the difference value of the two wind speeds is the wind thrust difference value, and then the wind thrust difference value is converted into a wind speed line. An electric signal corresponding to the wind speed line is transmitted into the main controller, the main controller controls the driving assembly to drive the shell to rotate so as to drive the two wind power generation systems to rotate synchronously until the wind turbine generator directly faces incoming flow, wind energy can be collected at the maximum efficiency, and the wind energy capturing efficiency is improved.

The invention provides a single-point mooring floating type fan active yaw control method based on the Magnus effect, and belongs to the technical field of offshore wind power. A wind direction angle is obtained in real time through a wind direction sensor, and the deviation between the wind direction angle and the azimuth angle of a platform main shaft is judged by combining the wind direction angle with the azimuth angle; the system calculates the average wind direction in a set time window so as to suppress the influence of high-frequency wind direction disturbance; the controller dynamically calls a model predictive control (MPC) algorithm according to wind direction deviation, outputs target rotating speeds of the two yaw control devices, and generates stable lift force perpendicular to the incoming flow direction to drive the platform to rotate around a single-point mooring point, so that active wind facing is achieved; the method is matched with a yaw control device, accurate and rapid attitude control can be achieved, and the wind facing capacity and the structural stability of the draught fan are remarkably improved; and the water ballast tank and the variable pitch system can be linked, the adaptability of the platform under the extreme sea condition is enhanced, and the platform has good robustness and engineering feasibility.

The invention provides a single-point mooring device, and relates to the technical field of ocean engineering equipment, the single-point mooring device comprises a rotating assembly, the rotating assembly comprises an outer tower, an inner tower and a slewing bearing, the side wall of the outer tower is used for being installed at the bow part of a platform, and the outer tower is connected with the inner tower through the slewing bearing; a slewing assembly is arranged on the slewing bearing so that the outer tower and the inner tower can rotate relatively, a plurality of chain stoppers are arranged on the inner tower, and the chain stoppers are connected with mooring anchor chains through guide chain wheels; when the mooring anchor chain is fixed to the seabed, the platform can rotate by 360 degrees around the inner tower under the action of sea wind, sea waves and seawater. The rotary winding friction problem can be avoided, meanwhile, the balance is improved, and the operation stability of the device can be guaranteed.

This application relates to the technical field of single-point mooring system sealing, and provides an RDU-type liquid slip ring spring energy storage seal testing system and method. The RDU-type liquid slip ring spring energy storage seal testing system of this application includes a pressure loading module, a sealing test module, a power module, a monitoring module, and a control module. This RDU-type liquid slip ring spring energy storage seal testing system can balance the internal pressure and stabilize the sealing gap through a reaction frame and loading cylinder, and collect parameters such as torque leakage and contact stress using multi-channel sensors. Combined with an automatic adjustment function, it achieves the invention objective of testing sealing performance parameters under multiple operating conditions. In addition, this application also provides a method applied to the RDU-type liquid slip ring spring energy storage seal testing system, including steps such as multi-operating-condition torque testing, contact stress testing, and critical leakage gap testing. It can also combine test data to construct a digital twin model for seal performance evaluation, prediction, and model iterative updates.

The invention provides a yaw auxiliary control method for a double-impeller single-point mooring floating fan and a related device. The yaw auxiliary control method comprises the following steps: continuously monitoring a non-wind proportion value corresponding to the fan and a passive yaw angular velocity corresponding to a fan floating body; whether the current yaw error is too large or not is determined according to the non-wind-alignment proportion value; if yes, a target yaw auxiliary control strategy is determined according to the passive yaw angular velocity, and the target yaw auxiliary control strategy is executed. Aerodynamic indexes-a non-wind-facing ratio value and a floating body operation state index-a passive yaw angular velocity are comprehensively considered, a yaw auxiliary control strategy is dynamically matched according to the current power of an impeller, self-adaptive control over power generation benefits and structure safety is achieved, dynamic balance of power generation efficiency, structure loads and platform stability is achieved, and power generation efficiency is improved. The reliability of the whole system is remarkably improved, the power generation efficiency is improved, and oscillation is suppressed and the reliability of the system is enhanced under the working conditions of large-amplitude sudden change of wind directions, serious inconsistency of wind waves and flows and the like.

The utility model discloses a marine hydrology three-dimensional observation buoy device which comprises a buoy, a mooring rope and an anchoring part, the head of the buoy is an ellipsoid section, the middle of the buoy is a cylindrical or conical gradual change section section, the tail of the buoy is a conical contraction section, the head of the buoy is connected with the mooring rope, and a plurality of observation instruments are arranged on the mooring rope. The buoy in a submarine / water drop shape is adopted, and the load of incoming flow on the buoy can be effectively reduced; and in cooperation with single-point mooring, the buoy can rotate along with incoming flow, so that the load of the buoy is at the minimum level, the stability and reliability of the structure are greatly improved, and the service life of the buoy is prolonged.

The utility model relates to the technical field of ocean engineering equipment, in particular to a steel cable connector tie-back alignment tool which comprises a lever piece and a clamping assembly, and the lever piece is provided with at least one installation hole used for installing a floating bag. The clamping assembly is provided with two opposite connecting holes used for installing a steel cable connector, and the clamping assembly is connected with the bottom wall of the lever piece. The clamping assembly is located in the middle of the bottom wall of the lever piece, the mounting hole is located in the side wall of the lever piece, the bottom wall is adjacent to the side wall, and the lever piece is longer than the clamping assembly. Buoyancy torque is amplified through the lever principle of the lever piece, then the single floating bag is connected to the mounting hole of the lever piece in a matched mode, large-angle torsion and alignment of the steel cable connector can be rapidly completed, the steel cable connector is aligned to the pin shaft hole, the quite obvious effect on labor saving is achieved, the time of tie-back work of the steel cable connector is greatly shortened, and efficiency is improved; the problem that in the prior art, the tie-back operation efficiency of the steel cable connector on the underwater single-point mooring system is low is effectively solved.

The present application belongs to the field of ocean engineering, and particularly relates to a method and system for quickly mapping a single point mooring underwater hose configuration, aiming to solve the problems of long measurement time, low mapping accuracy and high safety risk. The present application comprises two parts of an overwater unit and an underwater unit. The overwater unit comprises an operation module, a signal conversion module and a signal receiving module. The underwater unit comprises a remote control underwater robot and an underwater beacon module. The remote control underwater robot (ROV) carries the underwater beacon module to move along a preset path, measures the node position coordinates and water depth data records of the pre-set underwater hose nodes, obtains measurement data, and sends the measurement data to the signal receiving module and the signal conversion module. The modeling basic data and the data to be processed are morphologically fitted to obtain a three-dimensional installation form model of the underwater hose. The present application changes the operation mode from simply relying on manual measurement and data reading to obtaining data by positioning equipment and fitting forms by software.

This invention provides a self-installing compliant single-point mooring module and its usage method, comprising an outer buoy, an inner buoy, a pulley block ring array module, a suspension counterweight, a gravity anchor, and a mooring cable. The outer buoy is fitted outside the inner buoy, and the pulley block ring array module is securely installed inside the inner buoy. Both the suspension counterweight and the gravity anchor are equipped with load monitoring and ballast water control systems. The pulley block ring array module includes multiple sets of inner-biased upper pulleys and outer-biased lower swing pulleys. One end of the mooring cable is connected to the gravity anchor, and the other end sequentially passes around the inner edge of the lower swing pulley, the outer edge of the upper pulley, and the inner edge of the upper pulley before connecting to the suspension counterweight. This invention, by using an inner and outer buoy combined with a pulley block ring array module and connecting the suspension counterweight and gravity anchor with multiple sets of mooring cables, effectively suppresses mooring cable tension fluctuations, reducing the installation and maintenance difficulty and cost of the mooring system.

The invention discloses a precision control process for segmented integration of an FPSO (floating production storage and offloading) internal turret single-point mooring system, which comprises the following steps of: arranging and manufacturing a datum point in a moon pool of an FPSO ship body, rechecking the datum point, and arranging a control target on the datum point in advance to improve the measurement accuracy; a three-dimensional scanner is used for conducting collision inspection on the single-point lower tower body and the moon pool, whether collision positions exist in the lower tower body carrying process or not is simulated and analyzed, and the positions where collision possibly occurs are modified or temporarily dismantled; a lower tower body control point is arranged, precision control and precise positioning are conducted in the whole process that the lower tower body is hoisted and integrated to the moon pool, and after in-place welding inspection is completed, a post-welding datum line of the lower tower body is confirmed and corrected. According to the segmented integration precision control process for the FPSO internal turret single-point mooring system, the situation of frequent reworking and modification is avoided, high rotation precision is guaranteed, and the overall construction cost of the single-point mooring system is reduced.