CN214823970U

CN214823970U - Modularized ultra-large floating platform

Info

Publication number: CN214823970U
Application number: CN202120794615.1U
Authority: CN
Inventors: 欧进萍; 刘亚琼; 任年鑫; 周智
Original assignee: Hainan University; Shenzhen Graduate School Harbin Institute of Technology
Current assignee: Hainan University; Shenzhen Graduate School Harbin Institute of Technology
Priority date: 2021-04-17
Filing date: 2021-04-17
Publication date: 2021-11-23
Anticipated expiration: 2031-04-17

Abstract

The utility model discloses a modularized ultra-large floating platform, which comprises a plurality of box-type modules, a plurality of semi-submersible modules and a chain mooring system, wherein the adjacent semi-submersible modules are movably connected, the box-type modules are arranged at the periphery of the semi-submersible modules, each box-type module is provided with a wave energy generating device, the wave energy generating device comprises a hydraulic power generating mechanism, a piston rod and a hydraulic rod connecting rod, the hydraulic power generating mechanism comprises a hydraulic cylinder, a hydraulic motor and a generator which are connected through pipelines, the hydraulic cylinder is connected with the piston rod and the hydraulic rod connecting rod, the hydraulic rod connecting rod is movably connected with the box-type modules, the piston rod is movably connected with the semi-submersible modules adjacent to the box-type modules, the box-type modules at the outer side of the floating platform can be used as a floating breakwater, the relative motion energy of the box-type modules at the outer side and the semi-submersible modules at the inner side can drive the wave energy generating device to generate electricity, the hydrodynamic response under the action of deep sea waves can be reduced, the utilization efficiency of wave energy can be improved, and the utilization cost can be reduced.

Description

Modularized ultra-large floating platform

Technical Field

The utility model relates to an ocean floating platform technical field especially relates to a modularization super large-scale floating platform.

Background

As the land space and resources gradually become saturated, countries begin to expand space and acquire resources from the ocean. The traditional 'reclamation of land by sea' causes great damage to the marine ecological environment and natural landscape, and the economic water area for reclamation of sea is below 20 meters, thus limiting the space expansion of deep sea area.

Since the 90 s of the 20 th century, all countries begin to aim at offshore modular ultra-large floating platforms which are more environment-friendly, easier to build and expand, wider in water depth range and easier to multifunctional. The modularized ultra-large floating platform has wide application, can be used as a platform for ocean resource development and utilization, a military base, an offshore transfer base, an offshore airport and the like, can also be used for supplementing the land area of coastal cities, and even can be directly used as an offshore city.

Modular very large floating platforms typically have two single module configurations: box modules and semi-submersible modules. The box-type module is easy to build and maintain, but has poor hydrodynamic performance, and is suitable for sea areas with good sea conditions; the semi-submersible module has small waterplane area, large draft and better hydrodynamic performance, and is suitable for open sea areas with severe sea conditions. The connection between modules is generally divided into rigid connection and flexible connection, wherein the rigid connection limits the relative displacement of all degrees of freedom between adjacent modules, so that the structure bears huge internal force, deformation and huge connection load; the flexible connection generally releases some degrees of freedom of relative displacement, reducing the connection load in some directions.

In a deep sea area with severe sea conditions, the modularized ultra-large floating platform can bear large hydrodynamic motion response and huge connection load, is very unfavorable for the safety and stability of the platform, and easily causes property loss and even life loss. In addition, the heave motion has a large influence on the stability of the floating platform, an effective means is needed to reduce the heave motion response of the floating platform, and the vertical dimension of the platform needs to be increased by reducing the heave response of the floating platform by a method of increasing the draught, so that the construction material is increased, and the economy is poor.

In addition, ocean waves contain huge energy, the worldwide wave energy exploitation amount with economic value is estimated to be 1-10 hundred million kW, and the theoretical reserve of Chinese wave energy is about 7000 ten thousand kW. The wave energy power generation device converts wave energy into mechanical energy through modes of mechanical transmission, pneumatic transmission or hydraulic transmission and the like, and then drives a generator to generate power through a motor, so that the wave energy power generation device has a quite wide development prospect. But independently lay wave energy power generation facility too high and be not convenient for the maintenance change in deep water sea area, the generating efficiency is also not high, consequently the utility model discloses hope can be on the super large-scale floating platform of modularization integrated wave energy power generation facility, for super large-scale floating platform provides the energy supply, improve the utilization efficiency and the reduce cost of wave energy.

SUMMERY OF THE UTILITY MODEL

In view of the above, a modularized ultra-large floating platform which is safe, stable and integrated with a wave energy power generation device is provided.

A modularized ultra-large floating platform comprises a plurality of box-type modules, a plurality of semi-submersible modules and a chain mooring system for mooring the semi-submersible modules, wherein the adjacent semi-submersible modules are movably connected, the box-type modules are arranged on the periphery of the semi-submersible modules, a wave energy power generation device is arranged on each box-type module and comprises a hydraulic power generation mechanism, a piston rod and a hydraulic rod connecting rod, the hydraulic power generation mechanism comprises a hydraulic cylinder, a hydraulic motor and a generator which are connected through pipelines, the hydraulic cylinder is connected with the piston rod and the hydraulic rod connecting rod, the hydraulic rod connecting rod is movably connected with the box-type modules, and the piston rod is movably connected with the semi-submersible module adjacent to the box-type module.

Furthermore, hinged supports are fixedly arranged on the adjacent box-type module and the adjacent semi-submersible module respectively, the piston rod is hinged with the hinged support on the semi-submersible module through a cylindrical pin, and the hydraulic rod connecting rod is hinged with the hinged support on the box-type module through a cylindrical pin.

Further, the hydraulic cylinder is located outside the box module, and the hydraulic motor and the generator are arranged in the box module.

Further, the hydraulic power generation mechanism further comprises a first one-way valve, a second one-way valve, a third one-way valve and a fourth one-way valve; the first one-way valve and the fourth one-way valve are sequentially connected in series through a pipeline, and the second one-way valve and the third one-way valve are sequentially connected in series through a pipeline; the first one-way valve and the fourth one-way valve are connected with the second one-way valve and the third one-way valve in parallel; outlets of the first check valve and the third check valve are connected to an inlet of the hydraulic motor; the outlet of the hydraulic motor is connected to the inlets of the second one-way valve and the fourth one-way valve; one of the two connecting ports of the hydraulic cylinder is connected between the first one-way valve and the fourth one-way valve, and the other connecting port is connected between the second one-way valve and the third one-way valve.

Further, the hydraulic power generation mechanism further comprises a high-pressure accumulator and a low-pressure accumulator which are connected with the generator.

Furthermore, the adjacent semi-submersible modules are hinged through a hinge connecting device, the hinge connecting device comprises two bases and cylindrical pins hinged with the two bases, and the two bases are respectively arranged on the side surfaces of the adjacent semi-submersible modules; the box-type module and the semi-submersible module are adjacent to each other and hinged through a hinge connecting device, the hinge connecting device comprises two bases and cylindrical pins hinged with the two bases, and the two bases are respectively arranged on the adjacent side faces of the box-type module and the semi-submersible module.

Further, the semi-submersible module comprises a platform, a stand column, a lower floating body and a tunable heave device, wherein the platform floats above the sea level and the lower floating body is submerged below the sea level when the semi-submersible module is used, the platform and the lower floating body are connected through the stand column, the tunable heave device comprises a heave plate and a rod piece which connects the heave plate to the position right below the lower floating body, and the length of the rod piece extending out of the lower floating body can be adjusted so as to adjust the underwater depth of the lower floating body.

Further, the anchor chain mooring system includes a plurality of anchor chains, a plurality of semi-submersible modules are connected with at least one respectively as whole four extreme angle departments the anchor chain, a plurality of semi-submersible modules are connected with at least one respectively as whole and the main wave of wave to vertically both sides the anchor chain and this anchor chain are parallel with the main wave of wave to, a plurality of semi-submersible modules do not set up as whole and the main wave of wave to parallel one side the anchor chain.

Furthermore, the box-type modules are distributed around the semi-submersible modules in an n shape, and the box-type modules are not arranged on one side of the semi-submersible modules, which is parallel to the main wave direction of waves as a whole, and are used for ship berthing and material transportation.

Furthermore, a cover plate is erected on the adjacent edge of the adjacent semi-submersible module, and a cover plate is erected on the adjacent edge of the adjacent semi-submersible module and the adjacent box-type module.

Compared with the prior art, the modularized ultra-large floating platform of the utility model is formed by the semi-submersible module and the box-type modules together, the adjacent modules are movably connected, and the box-type module at the outer side can be used as a floating breakwater to have a certain wave absorption function, so that the whole modularized ultra-large floating platform is safe and stable and has expansibility and deployment flexibility; relative motion between the outer box-type module and the inner semi-submersible type module can drive the wave energy power generation device to generate power, so that hydrodynamic response of the modularized ultra-large floating platform under the action of deep sea waves can be reduced, the utilization efficiency of the wave energy can be improved, and the utilization cost can be reduced.

Drawings

Fig. 1 is an elevation view of the modular ultra-large vessel of the present invention, wherein the dashed lines represent sea level.

Fig. 2 is a top view of the modular very large vessel shown in fig. 1.

Fig. 3 is a top view of the modular ultra-large vessel of fig. 1 with the deck removed.

Fig. 4 is an elevation view of the semi-submersible modules of the modular ultra-large vessel of fig. 1 connected to each other by connection means.

Fig. 5 is a top view of fig. 4 with the cover plate removed.

Fig. 6 is an elevation view of the modular ultra-large vessel of fig. 1 with the tank modules and semi-submersible modules connected to each other by connection means.

Fig. 7 is a top view of fig. 6 with the cover plate removed.

Fig. 8 is a front view of the tunable heave device of the modular very large vessel shown in fig. 1.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. One or more embodiments of the present invention are illustrated in the accompanying drawings to provide a more accurate and thorough understanding of the disclosed embodiments. It should be understood, however, that the present invention may be embodied in many different forms and is not limited to the embodiments described below.

As shown in fig. 1-3, the modularized ultra-large floating platform of the present invention comprises a plurality of semi-submersible modules 10, a plurality of box-type modules 20, a mooring system 30, a connecting device 40, and a wave power generation device 50.

The semi-submersible modules 10 are located in the center of the whole ultra-large floating platform, and the semi-submersible modules 10 are movably connected with each other through a connecting device 40. The number and size of the semi-submersible modules 10 can be optimally adjusted in combination with the actual engineering requirements. Each of the semi-submersible modules 10 includes a platform 12, a column 14, a lower buoy 16, and a tunable heave device 18. The platform 12 floats above sea level, the lower float 16 is submerged below sea level, and the platform 12 and the lower float 16 are connected by the columns 14. The columns 14 are preferably hollow cylindrical structures that may house elevator cabs, sightseeing areas, etc., and may also serve as passages from the platform 12 to the lower float 16, or may be used to house supplies and equipment. It should be understood that the size and number of the columns 14 can be optimally adjusted according to actual engineering requirements, and are not limited to the illustrated embodiment. Similarly, the lower float 16 may be a hollow structure, may be used as an underwater sightseeing area, and may also be used for material and equipment storage, etc.

As shown in FIG. 8, the tunable heave device 18 comprises a heave plate 180 and a bar 182 connecting the heave plate 180 to the lower float 16 directly below. The heave plate 180 is square and approximately equal to the bottom surface of the lower floating body 16 in size, and the specific size can be optimized and adjusted according to the actual engineering requirement and the marine environment. The heave plate 180 is parallel to the bottom surface of the lower float 16, which effectively adds additional mass and provides additional hydrodynamic damping, reducing the heave response of the semi-submersible module 10 and improving its motion performance. The rod 182 is an adjustable structure, and the underwater depth of the heave plate 180 can be optimized by adjusting the length of the rod 182 extending out of the lower float 16. For example, in shallow sea areas, the length of the rod 182 can be reduced, and the underwater depth of the heave plate 180 can be reduced to prevent the heave plate 180 from touching the bottom; in deep sea areas, the extending length of the rod 182 can be properly increased, and the underwater depth of the heave plate 180 can be increased; when towing, the heave plate 180 can be lifted to be in contact with the bottom surface of the lower floating body 16, so that the damping during towing is reduced.

The box module 20 is located outside the entire ultra-large vessel, surrounding the semi-submersible module 10. The top surface of the box module 20 is exposed above sea level and the bottom surface is submerged below sea level. Each box module 20 is movably connected to the adjacent semi-submersible module 10 by a connecting means 40. Preferably, the box-type modules 20 are not disposed on the side of the ultra-large floating platform parallel to the main wave direction of the waves (i.e. the lower side in the direction shown in fig. 2), and the box-type modules 20 are distributed around the semi-submersible modules 10 in an n-shaped manner, so that the ship can be conveniently parked and transported. The box-type module 20 is arranged at the outer side of the semi-submersible module 10 and can play a role of a floating breakwater, namely, the wave load acting on the inner semi-submersible module 10 is effectively reduced, and the safety and the stability of the semi-submersible module 10 are improved; meanwhile, the relative pitching motion between the outer box-type module 20 and the inner semi-submersible type module 10 can drive the wave energy power generation device 50 to generate power, and is the utility model discloses the modularization ultra-large floating platform provides the energy supply.

The chain mooring system 30 is used to moor the semi-submersible modules 10 hinged together, limiting their horizontal displacement. Typically, the chain mooring system 30 includes a plurality of chains 32, the chains 32 being symmetrically distributed to ensure that the entire semi-submersible module 10 is evenly stressed. The material, number, length, mooring location, etc. of chain 32 need to be optimally designed in combination with actual engineering and marine environmental conditions to ensure the effectiveness of chain mooring system 30. Each anchor line 32 is fixed at its lower end to the seabed and at its upper end to the lower buoyant body 16 of the outermost semi-submersible module 10, as shown attached to the top surface of the lower buoyant body 16 near the side edges of the box module 20. Preferably, the four corners of the semi-submersible module 10 are connected with anchor chains 32, respectively, for positioning at four corners. Preferably, the modular ultra-large floating platform of the present invention is not provided with the anchor chain 32 on the side (i.e. the lower side in the direction shown in fig. 2) parallel to the main wave direction of the waves, so as to facilitate the docking of the ship; the chains 32 on the semi-submersible module 10 on both sides perpendicular to the major wave direction of the waves (i.e., on the left and right sides of the direction shown in fig. 2) are parallel to the major wave direction of the waves to optimize the forces on the semi-submersible module 10.

Preferably, a cover plate 60 is placed over the adjacent sides of two adjacent semi-submersible modules 10, and a cover plate 60 is placed over the adjacent sides of adjacent semi-submersible modules 10 and box modules 20. The cover plate 60 is generally square and serves as a passage for personnel, supplies, etc. between adjacent modules. The cover plate 60 may have a variety of different sizes depending on the width of the space between the semi-submersible modules 10 and the tank module 20.

As shown in fig. 4-7, the connection device 40 is connected between adjacent semi-submersible modules 10 and box modules 20. A single or multiple connection devices 40 may be provided between two adjacent semi-submersible modules 10 in conjunction with actual engineering requirements, with the size and location of the connection devices 40 between the semi-submersible modules 10 being determined primarily with a balance between hydrodynamic response and connector loading in mind. The single or a plurality of connecting devices 40 can be arranged between the adjacent box-type modules 20 and the semi-submersible module 10 according to the actual engineering requirements, parameters such as the size, the position and the like of the connecting devices 40 between the two modules need to be determined by comprehensively considering the distance between the floating bodies of the two modules, the power generation requirement of the wave energy device, the effect of the box-type modules 20 as a floating breakwater and the like, and optimization is carried out, so that hydrodynamic response, connector load and wave energy power generation efficiency can be well balanced.

The connecting means 40 are preferably hinged connecting means, each connecting means 40 comprising two seats 42 and a cylindrical pin 44. The two bases 42 are respectively fixed on the side surfaces of the platforms 12 of the two adjacent semi-submersible modules 10 or the side surfaces of the platforms 12 of the two adjacent box modules 20 and semi-submersible modules 10, the cylindrical pins 44 are vertically arranged and penetrate into the two corresponding bases 42, and the two bases 42 are hinged together to only allow the two connected semi-submersible modules 10 to rotate relatively around the cylindrical pins 44 or only allow the connected semi-submersible modules 10 and box modules 20 to rotate relatively around the cylindrical pins 44.

As shown in fig. 4 and 5, the wave energy power generation device 50 comprises a piston rod 54, a hydraulic rod link 56 and a hydraulic power generation mechanism 58. The piston rod 54 and the hydraulic rod connecting rod 56 are respectively hinged with a hinged support 52 through a cylindrical pin 53, and the two hinged supports 52 are respectively fixed on the platforms 12 of the adjacent box-type module 20 and the semi-submersible module 10. The hinged support 52 on the box-type module 20 is hinged with a hydraulic rod connecting rod 56 through a cylindrical pin 53, and the hinged support 52 on the platform 12 of the semi-submersible module 10 is hinged with a piston rod 54 through the cylindrical pin 53.

The hydraulic power generation mechanism 58 comprises a generator 580, a hydraulic cylinder 581, a first check valve 582, a second check valve 583, a third check valve 584, a fourth check valve 585, a throttle valve 586, a high-pressure accumulator 587, a low-pressure accumulator 588 and a hydraulic motor 589. Wherein, the hydraulic cylinder 581 of the hydraulic power generation mechanism 58 is disposed above the box module 20 and connected between the piston rod 54 and the hydraulic rod link 56; other components of the hydraulic power generation mechanism 58 are disposed within the box module 20, which is labeled a in fig. 5-6. The utility model discloses with hydraulic power generation mechanism 58 except that pneumatic cylinder 581 part A is integrated in box module 20, break down when wave energy power generation facility 50, can directly dismantle corresponding box module 20 of periphery, maintain hydraulic power generation mechanism 58 above that, perhaps carry out the whole change, greatly made things convenient for change and maintenance.

The first check valve 582 and the fourth check valve 585 are connected in series by a pipeline, and the second check valve 583 and the third check valve 584 are connected in series by a pipeline. First and

fourth check valves

582, 585 are connected in parallel with the second and

third check valves

583, 584 and then connected in series by piping to a throttle valve 586 and the hydraulic motor 589, wherein the outlets of the first and

third check valves

582, 584 are connected to the inlet of the throttle valve 586 and the outlet of the hydraulic motor 589 is connected to the inlets of the second and

fourth check valves

583, 585. The throttle valve 586 functions as throttling acceleration, etc., and can control the flow rate of the liquid in the liquid path. One of the two ports of the hydraulic cylinder 581 is connected between the first check valve 582 and the fourth check valve 585, and the other is connected between the second check valve 583 and the third check valve 584. The hydraulic motor 589 is in transmission connection with the generator 580 and drives the generator 580 to generate electricity; the generator 580 is connected to a high pressure accumulator 587 and a low pressure accumulator 588, and the high and

low pressure accumulators

587, 588 can play a role in storing electric energy, eliminating pulses and stabilizing pressure changes.

The relative pitching motion between the tank module 20 and the semi-submersible module 10 is generated by the action of the waves, the piston rod 54 is driven to reciprocate horizontally in the hydraulic cylinder 581, the liquid is driven to flow in the pipeline, and the liquid flows through the motor 589 to drive the generator 580 to generate electricity. Specifically, when the piston rod 54 is stretched in the hydraulic cylinder 581, the fluid in the hydraulic cylinder 581 passes through the first check valve 582 and the throttle valve 586 to the hydraulic motor 589, the hydraulic motor 589 makes continuous rotation under the pressure of the fluid and drives the generator 580 to generate electricity, and then the fluid returns to the hydraulic cylinder 581 through the second check valve 583; when the piston rod 54 is compressed in the hydraulic cylinder 581, the fluid in the hydraulic cylinder 581 passes through the third check valve 584 and the throttle valve 586 to the hydraulic motor 589, the hydraulic motor 589 rotates and drives the generator 580 to generate electricity, and then the fluid returns to the hydraulic cylinder 581 through the fourth check valve 585, so that the reciprocating cycle continues to generate electricity.

The utility model discloses modularization super-large-scale floating platform specifically builds, installs, the construction flow as follows:

the semi-submersible module 10 and the box module 20 are constructed in a shipyard, the semi-submersible module 10 and the box module 20 comprise a base 42 of a connecting device 40 fixed on the semi-submersible module 10 and the box module 20, a hinged support 52 for mounting a wave energy power generation device 50 and the like, a hydraulic power generation mechanism 58 except a hydraulic cylinder 581 is arranged in the box module 20, and the hydraulic cylinder 581 is connected with the hinged support 52 of the box module 20 together with a piston rod 54 and a hydraulic rod connecting rod 56;

according to the construction process of the anchor chain mooring system 30, arranging an anchor chain 32 at the selected address of the ultra-large floating platform; the internal semi-submersible module 10 is moved to a designated position by using a tugboat, then adjacent modules (comprising the semi-submersible module 10 and the box-type module 20) are sequentially moved to the designated position from inside to outside, and corresponding bases 42 on the modules are hinged by using round pins 44; and after the connection of all the modules is completed, the connection of the anchor chain 32, the laying of the cover plate 60 and the connection of the piston rod 54 and the hinged support 52 on the semi-submersible module 10 are performed, so that the construction, installation, construction and the like of the relevant parts of the invention are basically completed.

The utility model discloses modularization super large-scale floating platform adopts semi-submerged formula module 10 and box module 20 to constitute jointly, adopts standardized articulated connecting device 40 to connect between the module, and whole floating platform's construction, installation are more nimble, convenient. The tunable heave plate 180 device directly below the lower float 16 of the inner semi-submersible module 10 can reduce the heave motion response of the semi-submersible module 10, and has good hydrodynamic performance; the outer box-type module 20 can be used as a floating breakwater and has a certain wave-absorbing function, so that the whole modularized ultra-large floating platform is safer and more stable, and has expansibility and deployment flexibility; the relative motion between the outer box-type module 20 and the inner semi-submersible module 10 can drive the wave energy power generation device 50 to generate power, so that the hydrodynamic response of the modularized ultra-large floating platform under the action of deep sea waves can be reduced, the utilization efficiency of the wave energy can be improved, and the utilization cost can be reduced. The number and size of the tank modules 20 and semi-submersible modules 10 can be adjusted according to the specific functional requirements and the specific marine environment in which they are located, with emphasis on the motion response of the floating platform, the connection load, the wave-damping function, and the power generation efficiency of the wave power generation apparatus 50.

In the modularized ultra-large floating platform, the semi-submersible module 10 is used as the main module of the whole floating platform, has better hydrodynamic performance and stronger adaptability to severe sea conditions; the tunable heave plate device 18 can effectively improve the heave motion response of the inner semi-submersible module 10 and improve the stability of the floating platform; the

modules

10 and 20 are connected by the hinge connection device 40, so that the transfer of bending moment load between the

modules

10 and 20 can be effectively released, the bending moment load of the connection device 40 between the

modules

10 and 20 is reduced, and the expansion of the floating platform is facilitated; the anchor chain mooring system 30 is easy to install and remove, and the expansion of the floating platform is facilitated; the box module 20 in the outside can play the effect of floating breakwater to inboard semi-submerged formula module 10 to the relative motion between box module 20 in the outside and inboard semi-submerged formula module 10 can drive wave energy power generation facility 50 and generate electricity, does the utility model discloses floating platform provides the energy and supplies with. The utility model discloses modularization super large-scale floating platform adopts standardized module and standardized module connecting device, has to build advantages such as convenient, easy maintenance, easy expansion.

It should be noted that the present invention is not limited to the above embodiments, and other changes can be made by those skilled in the art according to the spirit of the present invention, and all the changes made according to the spirit of the present invention should be included in the scope of the present invention.

Claims

1. A modularized ultra-large floating platform comprises a plurality of semi-submersible modules and a chain mooring system for mooring the semi-submersible modules, wherein the adjacent semi-submersible modules are movably connected.

2. The modular ultra-large floating platform according to claim 1, wherein hinge supports are respectively and fixedly arranged on the adjacent box-type module and the adjacent semi-submersible module, the piston rod is hinged with the hinge support on the semi-submersible module through a cylindrical pin, and the hydraulic rod connecting rod is hinged with the hinge support on the box-type module through a cylindrical pin.

3. The modular very large vessel as claimed in claim 1, wherein said hydraulic cylinder is located outside said tank module, said hydraulic motor and generator being disposed within said tank module.

4. The modular ultra-large vessel of claim 3, wherein said hydraulic power generation mechanism further comprises a first check valve, a second check valve, a third check valve, and a fourth check valve; the first one-way valve and the fourth one-way valve are sequentially connected in series through a pipeline, and the second one-way valve and the third one-way valve are sequentially connected in series through a pipeline; the first one-way valve and the fourth one-way valve are connected with the second one-way valve and the third one-way valve in parallel; outlets of the first check valve and the third check valve are connected to an inlet of the hydraulic motor; the outlet of the hydraulic motor is connected to the inlets of the second one-way valve and the fourth one-way valve; one of the two connecting ports of the hydraulic cylinder is connected between the first one-way valve and the fourth one-way valve, and the other connecting port is connected between the second one-way valve and the third one-way valve.

5. The modular ultra-large vessel as set forth in claim 3, wherein said hydraulic power generation mechanism further comprises a high pressure accumulator and a low pressure accumulator connected to said generator.

6. The modular ultra-large vessel of claim 1, wherein adjacent ones of said semi-submersible modules are hinged by a hinge connection means comprising two bases and cylindrical pins hinged to said two bases, said two bases being mounted on respective sides of adjacent ones of said semi-submersible modules; the box-type module and the semi-submersible module are adjacent to each other and hinged through a hinge connecting device, the hinge connecting device comprises two bases and cylindrical pins hinged with the two bases, and the two bases are respectively arranged on the adjacent side faces of the box-type module and the semi-submersible module.

7. The modular ultra-large floating platform of claim 1, wherein the semi-submersible module comprises a platform, a column, a lower float, and a tunable heave device, wherein the platform floats above sea level and the lower float is submerged below sea level when in use, the platform and the lower float are connected by the column, the tunable heave device comprises a heave plate and a rod connecting the heave plate to the lower float directly below, and the length of the rod extending out of the lower float is adjustable to adjust the underwater depth of the lower float.

8. The modular very large vessel as claimed in claim 1, wherein said mooring system comprises a plurality of mooring lines, at least one of said mooring lines is connected to each of four corners of said plurality of semi-submersible modules as a whole, at least one of said mooring lines is connected to each of two sides of said plurality of semi-submersible modules as a whole perpendicular to the major wave direction of the waves and is parallel to the major wave direction of the waves, and said mooring lines are not provided on the side of said plurality of semi-submersible modules as a whole parallel to the major wave direction of the waves.

9. The modular very large vessel as claimed in claim 1, wherein said plurality of tank modules are distributed n around said plurality of semi-submersible modules, said plurality of semi-submersible modules as a whole being free of said tank modules on the side parallel to the major wave direction of the waves for vessel docking and material transport.

10. The modular ultra-large vessel as claimed in claim 1, wherein a cover is placed over adjacent sides of adjacent semi-submersible modules and a cover is placed over adjacent sides of adjacent semi-submersible and tank modules.