36results about How to "Shorter working time at sea" patented technology

The invention discloses a wind and wave resisting floating type offshore photovoltaic power generation platform. A platform truss, a photovoltaic plate assembly, weight balls, support columns, a floater, a heaving plate, pile foundations and mooring cables are included. The photovoltaic plate assembly is flatly laid on the platform truss. The weight balls are arranged below the platform truss. Thesupport columns are connected with the platform truss and the weight balls. The floater is fixed between the support columns, and buoyancy provided by the floater can be transmitted to the photovoltaic power generation platform. The heaving plate is connected to the lower portions of the weight balls. The pile foundations are fixed in a seabed and used for mooring the offshore photovoltaic powergeneration platform. One ends of the mooring cables are moored to the support columns, and the other ends of the mooring cables are moored to the pile foundations. By means of the wind and wave resisting floating type offshore photovoltaic power generation platform, the capability of resisting wind, waves and flow loads through a supporting structure is guaranteed, economic feasibility and construction convenience are achieved, and accordingly application of the photovoltaic power generation platform to the field of ocean open water area is assisted.

The invention discloses a ship special for transporting and installing a whole offshore wind turbine and a method. The ship special for transporting and installing the whole offshore wind turbine comprises a transporting barge, a fixed steel framework and a movable steel framework. A plurality of self-elevating piles are arranged on a main body of the transporting barge. The fixed steel framework is provided with a plurality of first wind turbine hooping mechanisms. The movable steel framework is arranged below the fixed steel framework in a sliding mode. The movable steel framework comprises a first supporting leg and a second supporting leg, wherein the first supporting leg and the second supporting leg are arranged on the two sides of the main body oppositely. Crossing supporting beams are arranged at the upper end of the first supporting leg and the upper end of the second supporting leg. A second wind turbine hooping mechanism is arranged in the middle of each supporting beam. A sliding track is arranged on the lower end face of each supporting beam and provided with a hoisting mechanism. Balance hangers are arranged below the supporting beams. Third wind turbine hooping mechanisms are arranged on the balance hangers. The hoisting mechanisms are connected with the balance hangers. A wind turbine installing notch is formed in the stern of the main body. The ship can transport and install the whole wind turbine and effectively reduce cost.

The invention provides a lifting machine tool for impellers of offshore wind turbines. The lifting machine tool comprises a swing arm component, a spring locking component, a swing arm rotation component, a rolling wheel adjustment component and a hydraulic cylinder power component. The bottom side of the swing arm component is connected with the swing arm rotation component through a pin shaft and the top side thereof is connected with the rolling wheel adjustment component. The hydraulic cylinder power component comprises a bottom hydraulic cylinder and an adjustment hydraulic cylinder. Two ends of the adjustment hydraulic cylinder are connected with the swing arm component and the rolling wheel adjustment component respectively through pin shafts. Two ends of the bottom hydraulic are connected with the swing arm component and the swing arm rotation component respectively so as to control rotation of the swing arm rotation component. The lifting center of the lifting machine tool is suspended on a main lifting hook. The tail end of a swing arm is fixedly connected with a hub of an impeller. The impeller can be overturned in the air and subjected to compensation of elevation angle conveniently and quickly by the aid of an auxiliary hook, so that elevation requirements can be met. Besides, offshore mounting efficiency can be effectively improved and offshore mounting cost can be saved.

The invention discloses a buoyancy mounting method for blocks. The method comprises the following steps of: (1) arranging block jointing devices on struts of the blocks to be arranged in advance; (2) transversely mooring a power positioning ship to a wharf, wherein the heights of sliding ways of the wharf are ensured to be consistent with those of sliding ways on a main deck of the power positioning ship; (3) dragging the blocks onto the power positioning ship for fixed welding, wherein the power positioning ship has self-propulsion capability and power positioning capability; and (4) propelling the power positioning ship to conduit supports to be arranged, propelling the power positioning ship to notches of the conduit supports, jointing the blocks and the conduit supports when the power positioning ship reaches the jointing positions of the blocks, and propelling the power positioning ship out of the notches of the conduit supports to finish the buoyancy mounting of the blocks after the blocks are jointed. The method can be widely applied to the entire buoyancy operation of the blocks, in particular to block mounting under severe environmental conditions in the south sea of China, the development cost of oil and gas fields is saved, and the efficiency is improved.

The invention discloses an oil well single-cylinder double-well casing mechanical electrical cutting device which includes a first anchoring mechanism (2), a rotary joint (3), a cutting mechanism (4),a speed reducer (6), a drive motor (7) and a second anchoring mechanism (8) which are sequentially arranged. The cutting mechanism (4) comprises a cutting blade (45), and the driving motor (7) can drive the cutting blade (45) to conduct rotary cutting. The oil well single-cylinder double-well casing mechanical electrical cutting device can effectively prevent the condition that cutting of a single-cylinder double-well casing is influenced by tracks of two wells and well body structures, operation is simple, the success rate is high, a complex ground power source is not needed, a pure mechanical cutting method is adopted, the marine ecological environment is effectively protected, cutting operation is efficient, safe and smooth implementation of subsequent operation can be ensured, and thesafe and efficient development of offshore oil is achieved.

The invention relates to an offshore fan supporting structure and a construction method thereof. The offshore fan supporting structure comprises a main body mechanism, a supporting platform and a transition mechanism. The offshore fan supporting structure is great in integral rigidity, can be suitable for water path of 60 m, and is beneficial for improving applicability and reliability of an offshore fan foundation. Each foundation structure of the supporting structure can be constructed on land, so that foundation mounting can be completed by only needing to grouting on sea, offshore operation time is reduced, and construction cost is reduced. A main cylinder of the transition mechanism is connected through four diagonal bracings, the tops of the diagonal bracings are connected with the main cylinder, and the bottoms of the diagonal bracings are connected with leg cylinders, so that great bending moment of the fan is reasonably converted into axial force of diagonal bracings, and therefore, fatigue performance of the area is improved.

The invention provides a heavy draught seaborne floating wind turbine integral installation work ship. A wind turbine comprises a tower drum and a heavy draught seaborne floating foundation provided with a hard cabin and a soft cabin. the installation work ship comprises a work ship, a truss, multiple bearing piers, a dumping winch, a dumping steel wire rope, a lifting pulley block, a dumping pulley block, two lifting winches, two lifting steel wire ropes and a dumping rotating shaft, wherein the truss, the dumping winch and the bearing piers are arranged on a main deck; two ends of the dumping steel wire rope are respectively connected with the tower drum and the dumping winch; the lifting pulley block is arranged on a shell of the hard cabin; the dumping pulley block is arranged on the upper part of the heavy draught seaborne floating foundation; two ends of one lifting steel wire rope are respectively connected with the lifting pulley block and the lifting winch arranged on the middle of the truss, and two ends of the other lifting steel wire rope are respectively connected with the dumping pulley block and the lifting winch arranged on the top of the truss; the soft cabin is hinged to a slot in the tail part of the work ship through a soft cabin pin shaft hole and the dumping rotating shaft. The heavy draught seaborne floating wind turbine integral installation work ship has dual functions of transportation and installation, saves operation time, reduces the cost, and is suitable for construction of a large-scale seaborne floating wind turbine plant.

The invention provides an ice-breaking and wave-eliminating composite device for an offshore wind power pile-type foundation. The ice-breaking and wave-eliminating composite device is installed on a vertical steel pipe pile, and an upper annular plate and a lower annular plate are arranged on the outer wall of the steel pipe pile in the circumferential direction. The ice-breaking and wave-eliminating composite device comprises an ice-breaking cone, a plurality of ice-breaking blades and a sleeve, the ice-breaking cone is in an annular shape, a plurality of wave-eliminating holes are formed inthe ice-breaking blades , all the ice-breaking blades are vertically fixed to the ice-breaking cone at intervals, the ice-breaking cone sleeves the outer wall of the sleeve, the sleeve sleeves the outer side of the steel pipe pile, and is located between the upper annular plate and the lower annular plate and slidably connected with the steel pipe pile; a plurality of first telescopic springs arearranged at the top of the sleeve in the circumferential direction, and a plurality of second telescopic springs are arranged at the bottom of the sleeve in the circumferential direction. The ice-breaking and wave-eliminating composite device has the beneficial effects that the structure is simple, the cone volume is small, the vertical height is less than the difference between the average high tide level and the average low tide level in the sea area where the device is located, the self-adaption change with the tide level can be achieved, and the ice load during the ice period and the waveload during the ice-free period are effectively reduced.

The invention belongs to the field of offshore wind power engineering, and particularly relates to an anti-scour construction method for an offshore wind power pile foundation based on solidified side bulldozing. The anti-scour construction method comprises the following steps that S1, a grouting pipeline is arranged in the pile foundation in advance; S2, the pile foundation is driven into an overburden layer; and S3, grouting equipment is connected with the grouting pipeline, and grouting filling is conducted on a scouring pit and a small gap caused by construction disturbance between the periphery of the pile foundation and the overburden layer till the upper surface of a grouting material is higher than the surface of the seabed overburden layer. The anti-scour construction method has the advantages that after the pile foundation is sunk, the gap between soil bodies around a pile and the scouring pit are grouted, soil body looseness generated in the installation process can be repaired, soil body holes can be filled, and therefore the bearing capacity of the pile foundation is prevented from being reduced, and the scouring pit is prevented from being further enlarged.

The invention discloses a draught fan foundation structure with a single pile of transition sections. The draught fan foundation structure with the single pile of the transition sections comprises a single pile body and the transition sections. The transition sections are internally arranged on the inner side of the single pile body and are connected with the single pile body to form a whole through welding. The upper ends of the transition sections are connected with an upper tower barrel through flange rings. Operation platforms are arranged at the upper end of the single pile body and are located on the outsides of the lower ends of the transition sections. The operation platforms are clamped and buckled in preformed clamping grooves in the outside of the upper end of the single pile body. A construction method comprises five steps. The draught fan foundation structure with the single pile of the transition sections is different from a structure scheme with transition sections on the outsides, offshore grouting is not needed, the offshore operation time is saved and the cost is reduced; in addition, the transmission force of the structure is mainly conducted through a welding structure, so that the reliability of the structure is increased. Compared with a single pile foundation without a transition section structure, the requirements for construction equipment and construction technology are lowered; under the background that offshore wind power will be developed on a large scale, the construction progress is speeded up, and the verticality requirement of a single pile foundation and the safety of a flange ring structure can be ensured.

The invention provides a method for increasing well slots without stopping production on an offshore petroleum platform, comprising the following steps: (1) installing a subsea template (3) at one side of the bottom part of the original platform jacket (2); (2) removing a craw (13) on the subsea template (3); (3) inserting a steel pile (4) into a steel pile guide structure (12) of the subsea template (3), and then driving the steel pile (4) into the guide structure; (4) covering and fixing a steel pile sleeve (11) on the steel pile (4); (5) inserting a conductor tube (6) into a conductor tube guide structure (14), driving the conductor tube (6) into the guide structure and fixing the conductor tube with the guide structure together; (6) installing a connection structure (7) between the upper part of the platform jacket (2) and the conductor tube (6) of a new structure to integrate the original platform with a newly added well slot structure; and (7) installing a deck (8) on the original platform module (1), wherein, the deck (8) is positioned above the conductor tube (6). The method of the invention can greatly lower offshore operation time and construction cost, avoid shutdown during the offshore construction period and improve economic benefit for production.

The invention relates to a wet-dragging self-installation type offshore substation and seabed big data center integral structure and an installation and maintenance method. The wet-dragging self-installation type offshore substation and seabed big data center integral structure is mainly composed of an offshore substation upper module, an integral jacket, a seabed big data center module and lifting type connecting pile legs for connecting the upper module and the seabed big data center module. According to the invention, a wet-dragging self-installation type integral structure scheme is adopted, the device can be applied to a seabed big data center of an offshore transformer substation structure attached to medium and small upper modules (such as 200MW-500MW offshore booster stations), the application range is wide, the feasibility is high, the additional value of the offshore transformer substation is effectively improved, the electric energy access and data transmission requirements of the seabed big data center are met, and the cost is reduced. And the offshore construction operation flow of each stage of transportation, installation, service operation and maintenance is simplified.

The invention provides a prefabricated-type high-rise pile cap foundation and a construction method thereof. The prefabricated-type high-rise pile cap foundation comprises a prefabricated cap main body and a plurality of piles used for supporting the prefabricated cap main body. A plurality of pile-embedding compartments with upward openings are formed on the prefabricated cap main body, all the pile-embedding compartments and all the piles are in one-to-one correspondence, pile-penetrating holes are formed in the bottoms of the pile-embedding compartments and downwards penetrate to the bottomface of the prefabricated cap main body, and supported parts extending transversely are arranged on the side walls of the pile-embedding compartments. The upper ends of the piles pass through the pile-penetrating holes to extend into the pile-embedding compartments, and the upper ends of the piles are connected with the supported parts through height adjusters. The pile-embedding compartments arefilled with building structure materials, and the building structure materials enable the prefabricated cap main body and all the piles to be fixedly connected into a whole. The offshore operation time of the high-rise pile cap foundation is reduced, the overall construction period of the high-rise pile cap foundation is shortened, and the offshore application range of the high-rise pile cap foundation is expanded.

The invention discloses a large-diameter single-pile steel pipe pile internal inserting transition section grouting construction system and method. The system comprises a steel pipe pile and an internal inserting transition section. A ring plate arranged on the internal inserting transition section is fixedly connected with the steel pipe pile. The bottom of the internal inserting transition section is connected with the steel pipe pile through an installing part. Grouting slurry is grouted into a grouting area between the internal inserting transition section and the steel pipe pile. The method comprises the following steps that pile striking operation of the steel pipe pile is carried out, the portion, exceeding the designed elevation, of the upper end of the steel pipe pile is cut, andthe pile top is polished flatly; the internal inserting transition section is internally inserted into the steel pipe pile and fixed; and the grouting slurry is grouted into the grouting area. According to the system and the method, construction precision is high, the safety coefficient is high, the requirement for equipment is low, marine operation time and construction cost are saved, and grouting and connecting construction quality of the internal inserting transition section can be ensured.

The invention discloses a pipe clamp type sacrificial anode installation device free from underwater welding. The device comprises a pipe clamp (1) and a sacrificial anode block (2), wherein the sacrificial anode block (2) is arranged on the pipe clamp (1) and is electrically connected with the pipe clamp (1). The sacrificial anode block and the pipe clamp are connected into a whole in advance through welding; due to the pipe clamp, the sacrificial anode block can be quickly fixed on an underwater protected metal pipe fitting, so that the sacrificial anode block and the underwater protected metal pipe fitting are conducted; therefore, the effect of preventing underwater metal structures from being corroded and damaged is achieved. By the device, underwater high-efficiency installation of the sacrificial anode block is realized and conduction connection is kept; and the device disclosed by the invention is simple in structure and free from underwater welding, can be installed quickly and is capable of shortening offshore operation time and reducing offshore operation risks and the operation cost.

The invention discloses ADCP (Acoustic Doppler Current Profilers) ocean current investigation auxiliary equipment, which comprises an instrument fixing part and a ship side fixing part. The instrument fixing part comprises a long steel pipe and a short steel pipe connected mutually; a sleeve pipe is arranged on the long steel pipe; a horizontal pipe vertical to the sleeve pipe is arranged on the sleeve pipe; the ship side fixing part comprises fixing pieces arranged side by side; the fixing pieces comprise a connecting steel pipe, and a reinforced steel plate a and a reinforced steel plate b arranged on two ends of the connecting steel pipe; at least three through holes are formed in the connecting steel pipe; a screw rod is adopted to penetrate through the through holes in the connecting steel pipe so as to connect the fixing pieces; a steel ring is arranged on the front end of the reinforced steel plate a; two sides of the horizontal pipe on the sleeve pipe of the instrument fixing part penetrate through the steel ring on the front end of the reinforced steel plate a; the instrument fixing part and the ship side fixing part are connected. The equipment provided by the invention can be used for adjusting the height and the angle of an instrument entering water, the instrument discharge error caused by ship displacement or severe sea conditions can be effectively avoided, and the work efficiency and the ocean current measurement accuracy are greatly improved.

The invention discloses a supporting structure of a fixed offshore photovoltaic power generation platform and a construction method of the supporting structure. The supporting structure comprises a platform truss, a box foundation, supporting columns, negative pressure pumping holes and a towing float; the box foundation is arranged below the platform truss; the supporting columns connect the platform truss and the box foundation; the supporting columns are of a hollow structure, and the bottoms of the supporting columns communicate with the box foundation; the negative pressure pumping holesare formed in the tops of the stand columns and communicate with the supporting columns; and the towing float is arranged on the box foundation and connected with the supporting columns through connecting cables. According to the supporting structure of the fixed offshore photovoltaic power generation platform and the construction method of the supporting structure, for adopting modular design, each platform supporting structure can be formed separately, the adjacent structures are connected through hinges, the good integrity of the structures is ensured, meanwhile, the huge bending moment bore by the platform truss when the platform truss is laid on a large scale is greatly reduced, and the structures are enabled to have higher ability to resist environmental load.

The invention provides an integral type operation platform for offshore wind power construction and a construction method of the platform. The integral type operation platform comprises a platform main body structure (40), a pavement beam (20), a pavement panel (10), holes and shoulder pole beams (60); the platform main body structure (40) is formed by connecting trusses; the pavement beam (20) is fixed to the platform main body structure; the pavement panel (10) is fixed to the pavement beam (20); the holes are circumferentially and uniformly distributed and formed in the platform main body structure (40), the pavement beam (20) and the pavement panel (10) in a penetration mode; the shoulder pole beams (60) are arranged above the holes of the pavement panel (10), and the two ends of the shoulder pole beams (60) are detachably connected with the platform main body structure (40) through connecting structures arranged on the shoulder pole beams (60) correspondingly; and the holes are used for allowing offshore pipe piles to penetrate through from the position below the holes to support the shoulder pole beams. Therefore, according to the integral type operation platform for offshore wind power construction and the construction method of the platform, the predicaments that traditional offshore erecting of an on-site construction operation platform is long in time and low in construction efficiency, and the operation environment of workers is harsh are overcome, and the advantages of being high in construction efficiency, safe, short in offshore operation time and the like are achieved.

The invention belongs to the field of offshore wind turbines, and provides an offshore wind turbine composite barrel type foundation of a support-free single-column structure, which comprises a thin-wall outer barrel, a thin-wall inner barrel arranged at the central position of an inner cavity of the thin-wall outer barrel, a single-column transition section arranged on the thin-wall outer barrel and used for being connected with a wind turbine tower barrel, and a single-column foundation arranged between the thin-wall outer barrel and the single-column transition section and used for being connected with a wind turbine tower barrel. The conical variable-diameter force transmission structure is used for transmitting loads, and the reinforcing cylinder is arranged outside the thin-wall outer cylinder; wherein the interior of a cavity between the thin-wall outer cylinder and the thin-wall inner cylinder is divided into a plurality of first sealed cabins through a plurality of first cabin dividing plates; a plurality of reinforcing ribs are connected between the thin-wall outer cylinder and the reinforcing cylinder, and the interior of the reinforcing cylinder is divided into a plurality of second sealed cabins through a plurality of second cabin dividing plates. By arranging the conical reducing force transmission structure, the area, affected by stormy waves, of the composite barrel type foundation can be effectively reduced, and the berthing influence of an underwater structure on an operation and maintenance ship can be reduced.

The invention discloses a buoyancy mounting method for blocks. The method comprises the following steps of: (1) arranging block jointing devices on struts of the blocks to be arranged in advance; (2) transversely mooring a power positioning ship to a wharf, wherein the heights of sliding ways of the wharf are ensured to be consistent with those of sliding ways on a main deck of the power positioning ship; (3) dragging the blocks onto the power positioning ship for fixed welding, wherein the power positioning ship has self-propulsion capability and power positioning capability; and (4) propelling the power positioning ship to conduit supports to be arranged, propelling the power positioning ship to notches of the conduit supports, jointing the blocks and the conduit supports when the power positioning ship reaches the jointing positions of the blocks, and propelling the power positioning ship out of the notches of the conduit supports to finish the buoyancy mounting of the blocks after the blocks are jointed. The method can be widely applied to the entire buoyancy operation of the blocks, in particular to block mounting under severe environmental conditions in the south sea of China, the development cost of oil and gas fields is saved, and the efficiency is improved.

The invention discloses a precast pier suitable for a sea-crossing bridge, which comprises a pier main body, wherein the pier main body comprises a plurality of precast pier body segments arranged along the height direction of the pier main body; the adjacent two precast pier shaft segments are connected with each other through wet joint members. The wet joint members include a plurality of pairsof U-shaped reinforcing bars, a plurality of pairs of U-shaped reinforcing bars are preset between the adjacent two precast pier shaft segments, and a plurality of pairs of U-shaped reinforcing bars are spaced apart along the length direction of the precast pier shaft segments. A plurality of ring-shaped reinforcing bars, each ring-shaped reinforcing bar corresponding to a pair of U-shaped reinforcing bars, and each pair of U-shaped reinforcing bars is fixed by a corresponding ring-shaped reinforcing bar; Each pair of U-shaped reinforcing bars is fixed by a corresponding ring-shaped reinforcing bar, a gap is left between each pair of U-shaped reinforcing bars, and the gap between each pair of U-shaped reinforcing bars is located in the corresponding ring-shaped reinforcing bar; all ring bars and all U-shaped bars form a cavity which is connected with each other, and the cavity is filled with concrete.

The invention provides a fixed conduit traction sensor and a use method thereof, including a wind power pipe pile, a ship, a solidified soil conveying device, a ship traction device, and a sounding sensor; The conveying device transports the solidified soil in the ship to the scour pit of the pile foundation of the wind power pipe pile. The depth-sounding sensor is installed on the ship's traction device, and the depth-sounding sensor is used to measure the depth of the scour pit. Therefore, taking advantage of the characteristics of high fluidity of the solidified soil, the solidified soil can be pumped to the designated position by using the on-board deployment and direct pumping process, covering the whole area, and can be operated on a large scale, which greatly shortens the working time at sea. The ship traction device does not need to be close to the pile foundation during construction, which can greatly reduce the accidental damage caused by the collision of pile foundation and submarine cable during construction. The safety protection is reliable and guaranteed, and the normal operation of the wind farm will not be affected during construction.

The invention provides a method for increasing well slots without stopping production on an offshore petroleum platform, comprising the following steps: (1) installing a subsea template (3) at one side of the bottom part of the original platform jacket (2); (2) removing a craw (13) on the subsea template (3); (3) inserting a steel pile (4) into a steel pile guide structure (12) of the subsea template (3), and then driving the steel pile (4) into the guide structure; (4) covering and fixing a steel pile sleeve (11) on the steel pile (4); (5) inserting a conductor tube (6) into a conductor tube guide structure (14), driving the conductor tube (6) into the guide structure and fixing the conductor tube with the guide structure together; (6) installing a connection structure (7) between the upper part of the platform jacket (2) and the conductor tube (6) of a new structure to integrate the original platform with a newly added well slot structure; and (7) installing a deck (8) on the original platform module (1), wherein, the deck (8) is positioned above the conductor tube (6). The method of the invention can greatly lower offshore operation time and construction cost, avoid shutdown during the offshore construction period and improve economic benefit for production.

The invention discloses a drilling platform self-leveling device and a construction method thereof, and relates to the field of bridge construction. The drilling platform self-leveling device comprises a casing pipe, a supporting pile, a distributive girder and a connecting part, wherein the supporting pile can reciprocate in the casing pipe, a support is fixed to the outer wall of the casing pipe, a template beam is fixed to the outer wall of the supporting pile and located between the support and the distributive girder, and the support, the template beam and the distributive girder are all detachably connected with the connecting part. The drilling platform self-leveling device further comprises an adjusting mechanism with one end fixed to the supporting pile and the other end fixed to the distributive girder, and the adjusting mechanism can stretch and retract between the supporting pile and the distributive girder. The drilling platform self-leveling device is convenient to mount and capable of improving construction efficiency, and a smooth drilling platform can be established on the sea surface without reference targets.

The invention discloses a ship and a method for transporting and installing a complete offshore wind turbine. The special ship for transporting and installing a complete offshore fan includes a transport barge, a fixed steel frame, and a mobile rigid frame. The main hull of the transport barge is equipped with Multiple self-elevating piles, multiple first fan hoop mechanisms are installed on the fixed steel frame, the movable steel frame is slidably arranged under the fixed steel frame, and the mobile steel frame includes the first outriggers arranged oppositely on both sides of the main hull With the second outrigger, the upper ends of the first outrigger and the second outrigger are provided with a supporting beam spanning, the middle part of the supporting beam is provided with a second fan hoop mechanism, and the lower end surface of the supporting beam is provided with a sliding track, and the sliding track There is a lifting mechanism on the top, a balance hanger is arranged under the support beam, a third fan hoop mechanism is arranged on the balance hanger, the lifting mechanism is connected with the balance hanger, and the stern of the main hull is provided with a fan installation notch. It can realize the overall transportation and installation functions of the fan at the same time, effectively reducing costs.