CN114837478B - Wet-towed self-installation type offshore substation and seabed big data center integral structure and installation method - Google Patents

Wet-towed self-installation type offshore substation and seabed big data center integral structure and installation method Download PDF

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CN114837478B
CN114837478B CN202110144644.8A CN202110144644A CN114837478B CN 114837478 B CN114837478 B CN 114837478B CN 202110144644 A CN202110144644 A CN 202110144644A CN 114837478 B CN114837478 B CN 114837478B
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data center
big data
submarine
offshore
upper block
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CN114837478A (en
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戚海峰
李炜
俞华锋
汤群益
王永发
孙震洲
陈杰峰
马煜祥
黄春林
赵生校
冯卫江
贾献林
吕国儿
俞晶晶
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PowerChina Huadong Engineering Corp Ltd
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PowerChina Huadong Engineering Corp Ltd
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/0034—Maintenance, repair or inspection of offshore constructions
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
    • E04H5/02—Buildings or groups of buildings for industrial purposes, e.g. for power-plants or factories
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
    • E04H5/02—Buildings or groups of buildings for industrial purposes, e.g. for power-plants or factories
    • E04H5/04—Transformer houses; Substations or switchgear houses
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0039—Methods for placing the offshore structure
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
    • E04H2005/005—Buildings for data processing centers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/727—Offshore wind turbines

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Electric Cable Installation (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)

Abstract

The invention relates to an integral structure of an offshore transformer substation and a submarine big data center by adopting wet towing self-installation and an installation method, wherein the integral structure mainly comprises an upper block of the offshore transformer substation, an integral jacket, a submarine big data center module and lifting connecting pile legs for connecting the upper block and the submarine big data center module; the invention adopts a wet-towed self-installation type integral structure scheme, can be applied to the submarine big data center attached to the structures of the medium-sized and small-sized upper blocks (such as 200 MW-500 MW offshore booster stations), has wide application range and high feasibility, effectively improves the added value of the offshore substation, meets the electric energy access and data delivery requirements of the submarine big data center, and simplifies the offshore construction operation flow of each stage of transportation, installation and service operation and maintenance.

Description

Wet-towed self-installation type offshore substation and seabed big data center integral structure and installation method
Technical Field
The invention relates to an integral structure of a wet-towed self-installed marine substation and a submarine big data center and an installation and maintenance method, which are suitable for the field of ocean engineering.
Background
In recent years, china becomes the country with the largest newly-increased installed capacity in recent years, and more than 20 small offshore transformer substation structures in different types are successfully built in China. As the offshore wind power is developed to deep open sea and large capacity, the offshore transformer station continuously improves the steel structure consumption, the offshore installation construction cost and the like, and meanwhile, the offshore wind power is subsidized and the slope is removed, so that the yield of the offshore transformer station product is greatly reduced.
The applicant fuses a large data center structure in a new infrastructure with a large-scale offshore transformer substation developed before the application date, see China patent application of application number 202110005696.7, solves a series of problems of sea land, electric energy supply, data transmission and the like of a submarine large data center (IDC), increases additional benefits for the offshore transformer substation, and further provides a thought for improving the sea concentration.
The above-mentioned offshore transformer station and seabed big data center structure is suitable for the big transformer station structure that adopts the floating to install, and its upper portion chunk is usually up to ten thousand tons (like offshore converter station), and unilateral length of plane dimension can be up to hundred meters. The independent split jacket is generally large in notch, suitable for arranging submarine IDCs, and meanwhile, is used as a positioning frame to assist in accurate positioning of the jacket due to the requirement of the ship width of the floating ship in the floating installation method. The scheme aims at the characteristics of a large-scale transformer station. But the structure types such as the medium-small-sized offshore alternating current booster station cannot be directly applied. When the submarine IDC and the medium and small-sized offshore substation structure are used in a fusion mode, the following problems still exist to be solved: firstly, the upper assembly blocks of the small and medium-sized offshore substations are usually 1500-4500 tons, the plane size is small, and the floating installation method is uneconomical; secondly, jacket foundations of the existing medium-small offshore transformer stations are all integrated frames, the space for accommodating the submarine IDC module is not reserved under the water of the station site, and if the space is directly combined, the IDC needs to occupy extra sea area; thirdly, the upper assembly blocks of the existing small and medium-sized offshore substations are installed in a hoisting mode, so that the hoisting ship resources are pretty, and the offshore construction cost is high; fourth, when the above-water block and the underwater IDC part of the fusion facility are respectively installed, the butt joint surfaces such as cables, optical fibers, overhaul channels and the like which are required to be penetrated up and down have high requirements on deformation control of the structure, the offshore construction is complex, and the period is long. In summary, the prior art scheme is necessary to be improved, the applicability of the prior art scheme is improved, the installation and construction difficulty of the offshore transformer substation and the seabed IDC is reduced, and the engineering economy is improved.
Disclosure of Invention
The invention aims to provide a wet-dragging self-installation type offshore transformer substation and seabed big data center integral structure and a technological process scheme thereof, aiming at the problems that the existing small and medium-sized offshore transformer substation cannot directly accommodate the seabed IDC, the offshore installation construction cost of an upper block is high, the connection between the seabed IDC and the upper block is difficult and the like, and the offshore construction operation process of each stage of transportation, installation and service operation and maintenance can be simplified, the engineering cost is reduced, and the economy of the integral structure is improved.
To achieve the above object, according to a first aspect of the present invention, the following technical solutions are adopted:
wet-towed self-installation type offshore transformer substation and seabed big data center overall structure, characterized in that: the device mainly comprises an upper block of an offshore transformer substation, an integral jacket, a submarine big data center module and lifting connecting pile legs for connecting the upper block and the submarine big data center module;
the integral jacket consists of jacket fragments at the left side and the right side and a connecting frame for connecting the jacket fragments at the left side and the right side; the submarine cable protection pipes are arranged in the two split jackets and outwards, interference between submarine IDCs and submarine cable routing is avoided, and the connecting frames are arranged in jacket notches between the jackets at the left side and the right side; the jacket notch is a submarine cable-free notch.
The connecting frame is provided with a positioning structure, and the submarine big data center module is provided with a positioning structure which is vertically inserted and matched with the positioning structure on the connecting frame;
the submarine big data center module is provided with a pressure-resistant cabin array and a fixed frame, wherein the pressure-resistant cabin array is formed by connecting pressure containers, and the pressure containers are provided with equipment rooms, ballast water tanks and passway interfaces;
a connecting channel is arranged between the upper block of the offshore substation and the seabed big data center module;
the lifting type connecting pile leg penetrates through the upper block and the seabed big data center module, the lifting type connecting pile leg is connected with the upper block in a lifting manner, the lifting type connecting pile leg only provides seating bottom force under temporary working conditions, supporting force of the upper block of the offshore transformer substation in the on-site service is still provided by the jacket, and lifting function required by the installation process of the upper block of the offshore transformer substation can be achieved through the lifting type connecting pile leg; the submarine big data center module is connected with the lifting type connecting pile leg in a lifting mode, and the lifting function of the submarine big data center module under the temporary working condition can be achieved.
The upper assembly of the offshore substation is a multi-layer steel structure truss which is applied to commercial engineering, high-voltage electric primary equipment for realizing a main power transmission and transformation function and an electric secondary, heating ventilation, water supply and drainage function guarantee system which is attached to the high-voltage electric primary equipment are contained in the multi-layer steel structure truss, and the total weight of the multi-layer steel structure truss is about 1500-4500 tons according to the capacity and arrangement type of a wind farm.
For the jacket, according to the weight of the upper block, 2-3 supporting points are arranged on the single jacket for butt joint with the upper block; the single-piece jackets on the left side and the right side are symmetrically arranged. And three pile sleeves are additionally arranged outside supporting points far away from the connecting frame, so that the horizontal rigidity of the whole structure is enhanced, and the bearing capacity of the pile foundation is increased.
The integral jacket is provided with two connecting frames, is positioned at the upper and lower outermost sides of the bottom of the jacket segment, and has a plane in the shape of two or a Chinese character 'hui', and is about 3-5 m in height. The arrangement mode can effectively ensure the plane error of the butt joint supporting point with the upper assembly block while improving the hoisting rigidity of the jacket, and ensure the butt joint precision of the upper assembly block during lifting; the channel space with the reserved notch at the center of the connecting frame can sink into the submarine big data module, and the guide positioning device arranged at the connecting frame can directly position the upper block and the submarine IDC integrated structure, so that extra construction ships are avoided, and the butt joint construction precision is high.
The pressure-resistant cabin array part can also see a novel structure of a large data center in a new fused infrastructure of a large-scale offshore substation developed by the applicant before the application date (see Chinese patent application with the application number of 202110005696.7). In addition, a water pipe can be additionally arranged at the top of the pressure-resistant cabin (namely, the pressure container) and used for circulating internal cooling water, so that the heat dissipation effect is improved, and the PUE is further reduced; meanwhile, pull lugs are arranged on two sides of the pressure-resistant cabin, so that stability under power working conditions such as wet dragging and sinking is improved.
The cooperation of the positioning structure and the guiding positioning structure can accurately position the upper assembly block of the offshore substation and the submarine big data center module when the upper assembly block and the submarine big data center module are installed, and accurately position the offshore substation after the guiding separation and the temporary working condition are finished when the offshore substation is in the temporary working condition. Further, the fixing frame is provided with the vertical insertion type matched positioning structure, and the vertical insertion type matched positioning structure adopts a bracket tip inserting device.
The connecting channel adopts an automatic telescopic connecting channel, such as a telescopic sleeve type structure. A cable surplus which meets the lifting limit of the submarine big data center module is arranged between the upper block of the offshore substation and the submarine big data center module; when the submarine big data center module sinks or the upper block ascends, the automatic telescopic connecting channel can automatically stretch and retract, and the cable laying and recovery are realized.
The cable surplus which meets the limit state from the moment when the bottom of the submarine IDC is sunk to the moment when the upper block rises to the top of the lifting connecting pile leg is arranged in the submarine IDC, and the structure can automatically stretch and retract and realize the laying and recovery of the cable when the submarine IDC is sunk or the upper block rises; meanwhile, the inner side of the connecting channel is provided with a multi-stage ladder stand, so that an maintainer can go up and down.
The lifting type connecting pile leg consists of a steel truss, a lifting mechanism and a locking mechanism are arranged in the lifting mechanism, the lifting mechanism can adopt a gear-rack structure and is driven by a motor to drive a gear, and the up-and-down movement and the respective elevation positioning of an upper module and a lower module (an upper module of a marine transformer substation and a submarine big data center module) can be realized. The number of the lifting connecting piles can be four, and the lifting connecting piles are close to four corners of the module.
In order to achieve the above object, according to a second aspect of the present invention, the following technical solutions are adopted:
the method for installing and maintaining the integral structure of the marine transformer substation and the submarine big data center by wet towing is characterized in that an integral structure of an upper block of the marine transformer substation and the submarine big data center module, an integral jacket and self-installation type pile legs are built on land or in a dock, and equipment in the block and a pressure-resistant cabin are debugged and installed before the marine transport;
the method comprises the following steps:
firstly, an integral jacket is shipped to a designated sea area, and after lifting, sinking, piling and leveling, an upper block of an offshore transformer substation and a submarine big data center module integrated structure are shipped; the integrated structure empties ballast water in the pressure-resistant cabin in the wet towing process, provides maximum buoyancy, and adds a pontoon to realize the floating state of the integral structure if the integral weight is large; in the state, lifting connecting pile legs are lifted to the highest, the upper assembly block of the offshore transformer substation is lowered to the vicinity of the sea level, the gravity center is lowered, the stability during wet towing is improved, and a tugboat is adopted to wet-tow the integrated structure to the vicinity of a jacket;
lowering the lifting type connecting pile leg to the seabed, lifting the bottom surface of the upper assembly block slightly higher than the supporting point plane of the jacket, and then upwards contracting the lifting type connecting pile leg to avoid collision when the structure enters the notch of the jacket; after the tug wets and drags the integrated structure to the position without the submarine cable notch, ballast water in the pressure-resistant cabin is added, meanwhile, lifting type connecting pile legs and submarine big data center modules are lowered to the seabed, positioning structures on two sides of a fixed frame of the submarine big data center modules are inserted into positioning structures in a jacket connecting frame, and accurate positioning of the integrated structure is achieved;
then slowly lowering the upper block of the offshore substation to the jacket supporting surface to realize load transfer of the upper block; finally, laying and connecting pipelines, including connecting the power generation side submarine cable to the upper block of the offshore substation, communicating various pipelines between the upper block of the offshore substation and the pressure-resistant cabin, and connecting the outgoing submarine cable and the optical cable with the upper block of the offshore substation and the pressure-resistant cabin;
in the whole installation process, the connecting channel carries out self-adjustment according to the relative positions of the upper block of the offshore substation and the seabed big data center module;
in daily work of the submarine big data center module, monitoring is carried out through sensors and cameras arranged at different parts of the integrated structure, and general structure operation and maintenance work is carried out by the underwater robot; when local hardware damage exists in the submarine big data center module, the internal transmission mechanical equipment is used for automatic replacement;
during routine maintenance, workers enter the pressure-resistant cabin of the submarine big data center module from the upper block through the connecting channel; when corrosion protection and marine organism treatment or internal server replacement are newly added outside the pressure-resistant cabin if necessary, lifting the submarine big data center module to the water surface through the lifting connecting pile leg for operation; when the submarine big data center module needs to be returned to a factory for maintenance, the lifting type connecting pile legs are lifted to be separated from the submarine big data center module, then ballast water in the submarine big data center module is properly discharged to realize the floating of the submarine big data center module, the connecting channel is removed, the connecting channel is pulled by a tugboat to be horizontally moved out of the jacket notch, and the connecting pile legs are pulled back to land for maintenance.
The beneficial effects of the invention are as follows:
the invention adopts a wet-towed self-installation type integral structure scheme, can be applied to the submarine big data center attached to the structures of the medium-sized and small-sized upper blocks (such as 200 MW-500 MW offshore booster stations), has wide application range and high feasibility, effectively improves the added value of the offshore substation, meets the electric energy access and data output requirements of the submarine big data center, and specifically:
1) The submarine big data center and the upper block of the transformer substation are arranged up and down in the sea area, the submarine big data center is positioned in the notch of the jacket, the space utilization rate is high, the extra sea area is not needed, and the concept of intensive sea and green IDC is met; and the big data center structure is directly contacted with seawater, the natural temperature is low, and the seawater can be directly used for cooling the internal equipment.
2) The electric energy required by the operation of the submarine big data center is directly provided by the offshore transformer substation, namely the electric energy consumed by the submarine big data center is renewable clean energy, and the method accords with the concepts of multi-energy complementation, energy conservation and emission reduction; auxiliary systems such as water supply and drainage, heating ventilation, control, monitoring and the like in the transformer substation modules can be shared by the submarine big data center, and only core IT equipment, necessary pipelines and watertight equipment are placed in the pressure-resistant cabin, so that PUE is greatly reduced; each functional partition of the pressure-resistant cabin array is independent, mutual interference does not exist, and safety is high.
3) The adjustable ballast water tanks are arranged in the pressure-resistant cabin array of the large submarine data center, so that the large submarine data center and the large submarine data center are conveniently integrally hauled, the large submarine data center and the upper block are connected through the self-installation type pile legs and the multi-layer telescopic sleeves, the up-and-down movement and the self-installation of the upper block and the large submarine data center can be realized, a hoisting ship is not needed, the number of crossing surfaces of offshore operation is small, the simultaneous installation of the large submarine data center and the upper block can be realized, the construction process is simple and convenient, and the offshore construction period is greatly shortened.
4) The jacket foundation adopts an integral double-sided jacket, a submarine big data center notch is reserved in the middle, the butt joint precision of the two sides of the jacket and the main column of the upper block is ensured, the hoisting structure strength can be effectively improved, and the offshore operation time is greatly shortened compared with the independent split jacket on the two sides; when the structure is in-service, the pile foundation bearing capacity is provided by the jacket foundation, so that the problems of insufficient bearing capacity, low strength and the like of the self-installation pile leg are effectively avoided, and the survivability of the whole structure under the condition of extreme disasters is improved; the submarine big data center module can keep a certain gap with the seabed by adjusting the heights of the ballast water and the lifting type connecting pile leg positions, and can effectively prevent the scouring phenomenon.
5) The daily overhaul operation and maintenance of the submarine big data center can enter the pressure-resistant cabin through the overhaul channel inside the multi-section telescopic connecting sleeve, the seawater is not required to be contacted, and the operation is simple and the operation and maintenance are comfortable; when a large amount of internal servers of the pressure-resistant cabin are required to be replaced or external corrosion prevention and marine organism treatment are repaired, the pressure-resistant cabin array can be fixed on the water surface under the combined action of drainage and lifting connecting pile legs, so that the operation is simple and the influence on the operation of the submarine big data center is small; if the condition that the submarine big data center needs to be returned to a factory for maintenance occurs, the pile legs can be separated from the pressure-resistant cabin array and pulled back by the power ship. The detection scheme of the invention has wide applicability and easy operation, can effectively prolong the service life and can ensure the stable operation of the submarine IDC.
Drawings
FIG. 1 is an elevational schematic view of the overall structure of the present invention.
FIGS. 2-1, 2-2, 2-3, 2-4 and 2-5 are schematic plan views of a jacket and subsea IDC module, a schematic drawing of a corbel tip device, a cross-sectional view of an embodiment of a pressure pod, a schematic cross-sectional view of a telescoping connection channel, and an embodiment of a connection channel, respectively, of the present invention.
FIGS. 3-1, 3-2, 4-1, 4-2, 5-1, 5-2, 6-1, 6-2 are flowcharts of the installation process of the present invention, respectively.
FIGS. 7-1 and 7-2 are schematic diagrams of an inspection operation in an abnormal inspection state according to the present invention.
Description of the embodiments
To further illustrate the principles, features and advantages of the present invention, the following detailed description of the invention refers to the accompanying drawings.
As shown in fig. 1, the present invention is composed of the following parts: the marine transformer substation comprises an offshore transformer substation upper assembly 1, an integral jacket 2, a submarine big data center module 3, lifting connecting pile legs 4 and a telescopic connecting channel 5. The integral jacket 2 comprises a left jacket single piece 21, a right jacket single piece 22, a connecting frame 23, submarine cable protection pipes 24 and steel pipe piles 25. For clarity, the present schematic is not an in-service state of the overall structure. In the in-service state, the subsea big data center module 3 is lowered into the central space of the connection frame 23. According to the properties of the surface soil of the seabed, if the flushing effect is obvious, adjusting the elevation positioning of the ballast water tank 3A and the seabed big data center module 3 in the lifting connecting pile leg 4, and placing the seabed big data center module 3 above the seabed by 0.5-1 m, so as to avoid stress concentration caused by uneven seabed after direct bottom flushing; if the flushing effect is weak, the subsea big data center module 3 may sit directly on the seabed.
As shown in fig. 2-1, in this embodiment, the jacket is provided with 6 support points for butt joint with the upper block (two columns in the middle), and the outer 6 piles are only pile-sleeve structures for enhancing rigidity and pile foundation bearing capacity, and 12 steel pipe piles are arranged in total. According to the submarine cable access requirements of the offshore substation, 16 submarine cable protection pipes 24 are reserved, the upper port and the lower port are respectively positioned in and outside the single- piece jackets 21 and 22, and a submarine cable-free notch is formed between the left-side jacket single piece 21 and the right-side jacket single piece 22 for arrangement of the submarine big data center module 3; the left jacket single piece 21 and the right jacket single piece 22 are connected through welding of the two connecting frames 23, rigidity of jacket hoisting construction is guaranteed, plane errors of supporting points are reduced, and meanwhile 4 guide sleeves 231 are arranged at the positions of the connecting frames 23 to serve as guide positioning structures, so that accurate positioning of the submarine big data center module 3 and the upper assembly 1 is facilitated.
The submarine big data center module 3 consists of a fixed frame 31, a pressure cabin array 32 and a bracket tip inserting device 33. As shown in fig. 2-2, the bracket tip device 33 is welded to the outer side of the frame of the fixed frame 31, a fixed steel plate 311 having rigidity meeting the butt joint requirement is welded to the position of the fixed frame 31 where the bracket is arranged, and the bracket tip device structure consisting of an upper panel 331, a reinforcing rib plate 332, a lower panel 333 and a tip 334 is welded to the outer side of the fixed steel plate 311, and the bracket tip device 33 corresponding to the position of the guide sleeve 231 is arranged everywhere on the fixed frame 31.
As shown in fig. 2-3, the pressure pod array 32 is comprised of a cylindrical pressure vessel 321 connected. The cylindrical pressure vessel 321 is provided with a ballast water control pipeline 322, a passway port 324, a seaworthiness pull lug 325 and a fixing base 326, the pressure-resistant cabin array 32 is welded with the fixing support 326 at the bottom, the fixing is realized by utilizing the fillet weld around the fixing support 326 and the fixing frame 31, and meanwhile, a guy cable is arranged at the lower half side of the pressure-resistant cabin array and is fixed on the seaworthiness pull lug 325. A ballast water tank 3A, a cooling circulation pipe 323, a server 327, a robot arm 328, and a pipe 329 such as a cable are provided in the cylindrical pressure vessel 321. The cooling circulation pipeline 323 is connected into the cylindrical pressure vessel 321 at the end part thereof to realize circulation of cooling water, and is in direct contact with seawater to further accelerate heat dissipation and reduce PUE; the passer-by channel interface 324 can be connected with the passer-by channel interfaces of other independent cabins through flanges, and an internal passer-by overhauling channel is formed after connection is completed; the arrangement of the seaworthiness pull lugs 325 can improve the stability of the cylindrical pressure vessel 321 under the power working conditions such as wet dragging, sinking/floating and the like; the inside of the cylindrical pressure vessel 321 is divided into three layers, a pipeline 329 such as a cable is arranged on the top layer, the middle layer is a main equipment layer, a server 327 is arranged, a movable mechanical arm 328 is arranged in the middle of the server 327 and used for remote control and simple operation and maintenance of the server 327, the bottom layer is a ballast water tank 3A, and water inlet and outlet control of the ballast water tank 3A is realized through a ballast water control pipeline 322.
As shown in fig. 2-4, a telescopic vertical ladder 53 is arranged in the telescopic connection channel 5, enough cables, optical fibers and other lines 51 meeting the limit lifting and lowering allowance of the submarine big data center module 3 are arranged between the submarine substation upper module 1 and the submarine big data center module 3, the cables and the optical fibers pass through the telescopic connection channel 5, a cable reel 52 capable of winding and unwinding the cables is arranged in the telescopic connection channel 5, and the cable reel 52 can be arranged in the telescopic connection channel 5. The telescopic connection channel 5 can be automatically telescopic adjusted according to the distance between the upper block 1 of the offshore substation and the seabed big data center module 3 at each stage of the integral structure, and meanwhile, the cable drum 52 can be controlled to recycle and pay out the cables and the optical fibers. Under normal maintenance conditions, maintenance personnel can enter the pressure-resistant cabin through the straight ladder 53.
As shown in fig. 2-5, the telescopic connecting channel 5 is divided into four parts, namely, an inextensible segment 54, a large-diameter telescopic segment 55, a medium-diameter telescopic segment 56 and a small-diameter telescopic segment 57, wherein the inner diameter of the larger segment is equal to or slightly larger than the outer diameter of the smaller segment, and a watertight material is adopted to fill gaps, so that the up-and-down sliding function is realized while no gaps exist in the telescopic segments; the non-telescopic section and the telescopic section are connected by adopting a connecting flange 58, so that the disconnection during maintenance operation is convenient. When the upper block 1 and the seabed big data center 3 are positioned at the maximum distance position, each subsection 55, 56 and 57 of the telescopic section is positioned at the outer side of the subsection, and when the distance between the two subsections is changed, the telescopic section can be built-in and pulled out through pulling/pressure, so that the telescopic sleeve can be shortened and lengthened.
As shown in fig. 3-1, 3-2, 4-1, 4-2, 5-1, 5-2, 6-1 and 6-2, the marine transportation and installation schematic diagram of the invention is shown, and the flow is as follows:
1) As shown in fig. 3-1, the jacket 2 is transported to a designated sea area, lifted and sunk, steel pipe piles 25 are driven into a main guide pipe and a sleeve, and leveling and pile top cutting treatment are carried out on the jacket 2 after pile sinking is completed.
2) As shown in fig. 3-2, the integrated structure of the upper block 1 and the sub sea big data center module 3 is pulled by the tug 6 to a designated sea area. In the wet towing process, the bottom surface of the upper block 1 approaches the sea level to improve the overall stability, and the ballast water in the ballast water bin 3A is adjusted to realize the floating state of the overall structure.
3) As shown in fig. 4-1, after the integrated structure reaches a designated sea area, the lifting type connecting pile leg 4 is lowered to the seabed, and the upper assembly 1 is lifted to have the bottom surface higher than the supporting plane 1-2 m of the integral jacket 2.
4) As shown in fig. 4-2, the lifting connection legs 4 are lifted upwards, and the tug 6 continues to pull the integrated structure into the submarine cable-free recess between the left jacket monolith 21 and the right jacket monolith 22 in the overall jacket 2, taking care to avoid collision of the lifting connection legs 4 with the connection frame 23.
5) As shown in fig. 5-1 and 5-2, after the initial positioning, the ballast tank 3A is filled with pressurized water, and simultaneously the seabed big data center module 3 and the lifting connecting pile leg 4 are lowered to the seabed, and the four bracket tip inserting devices 33 of the fixed frame 31 are inserted into the guide sleeve 231, so that the accurate positioning of the whole structure is realized.
6) As shown in fig. 6-1 and 6-2, slowly lowering the upper assembly 1 to the supporting surface of the integral jacket 2, and welding crown plates and the like to realize load transfer of the upper assembly; finally, the pipeline in the telescopic connecting channel 5 is inspected to finish the offshore installation.
FIGS. 7-1 and 7-2 are schematic diagrams illustrating the maintenance operation in two abnormal maintenance states according to the present invention. As shown in fig. 7-1, if the pressure-resistant cabin array 32 in the submarine large data center module 3 needs to clean marine life outside, repair anticorrosive paint and change a small-scale server, the downloaded water in the ballast water cabin 3A can be drained, and meanwhile, the module 3 is lifted to the vicinity of the sea level by means of the lifting connecting pile legs 4, so that the above operation requirements are met. As shown in fig. 7-2, if the large-scale replacement of the server or the update of the equipment is required in the large-scale data center module 3, the lifting connection pile leg 4 can be lifted to separate from the large-scale data center module 3, the connection flange 58 is removed, the telescopic connection channel 5 is divided into an upper telescopic section and a lower fixed section 54, meanwhile, the cable connected with the large-scale data center module 3 is removed, meanwhile, the ballast water in the ballast water bin 3A is adjusted to float upwards, and is pulled to the outer side of the submarine cable-free notch through the tug 6, so that the maintenance of returning to the factory is realized.
The above embodiment is only one preferred technical solution of the present invention, and it should be understood by those skilled in the art that modifications and substitutions can be made to the technical solution or parameters in the embodiment without departing from the principle and essence of the present invention, and all the modifications and substitutions are covered in the protection scope of the present invention.

Claims (5)

1. Wet-towed self-installation type offshore transformer substation and seabed big data center overall structure, characterized in that: the device consists of an upper block of an offshore transformer substation, an integral jacket, a submarine big data center module and lifting connecting pile legs for connecting the upper block and the submarine big data center module;
the integral jacket consists of jacket fragments at the left side and the right side and a connecting frame for connecting the jacket fragments at the left side and the right side; the submarine cable protection pipes are arranged in the two split jackets and face outwards, and the connecting frames are arranged in jacket notches between the jackets at the left side and the right side;
the connecting frame is provided with a guiding and positioning structure, and the submarine big data center module is provided with a positioning structure which is vertically inserted and matched with the guiding and positioning structure on the connecting frame;
the submarine big data center module is provided with a pressure-resistant cabin array and a fixed frame, the pressure-resistant cabin array is formed by connecting cylindrical pressure containers, each cylindrical pressure container is provided with a ballast water control pipeline, a passway interface, a navigable pull lug and a fixed base, the pressure-resistant cabin array is welded with a fixed support through the bottom, the fixation is realized by utilizing fillet welds around the fixed support and the fixed frame, and meanwhile, the lower half side of the pressure-resistant cabin array is provided with a guy cable which is fixed on the navigable pull lug; a ballast water bin is arranged in the cylindrical pressure vessel;
a connecting channel is arranged between the upper block of the offshore substation and the seabed big data center module;
the lifting type connecting pile leg penetrates through the upper block of the offshore transformer substation and the seabed big data center module, the lifting type connecting pile leg is connected with the upper block in a lifting manner, the lifting type connecting pile leg only provides seating bottom force under temporary working conditions, supporting force of the upper block of the offshore transformer substation in-place service is still provided by the jacket, and lifting functions required by the installation process of the upper block of the offshore transformer substation can be realized by the lifting type connecting pile leg; the submarine big data center module is connected with the lifting type connecting pile leg in a lifting manner, and the lifting function of the submarine big data center module under the temporary working condition can be realized;
the fixing frame is provided with the vertical insertion type matched positioning structure, and the vertical insertion type matched positioning structure adopts a bracket tip inserting device, so that the vertical insertion type matched positioning structure can be accurately positioned when an upper assembly of the offshore substation and a submarine big data center module are installed, and can be accurately positioned after guide separation and temporary working conditions are finished;
the connecting channel adopts an automatic telescopic connecting channel; and a cable surplus meeting the lifting limit of the submarine big data center module is arranged between the upper block of the offshore substation and the submarine big data center module.
2. The wet-towed self-installed offshore substation and sub-sea large data center integrated structure of claim 1, wherein the automatically telescoping connection channel is self-telescoping and enables cabling and retrieval when the sub-sea large data center module is submerged or the upper block of the offshore substation is raised.
3. The wet-towed self-installed offshore substation and sub-sea large data center integrated structure according to claim 1, wherein adjacent pressure resistant containers are connected by a man-way interface to form a sealed man-way, and a lower end of said connection way is connected with said man-way.
4. The wet-towed self-installed offshore substation and sub-sea large data center integrated structure of claim 1, wherein said jacket notch is a hawser-free notch.
5. The method for installing the integrated structure of the wet-towed self-installed offshore substation and the seabed big data center according to claim 1, wherein the integrated structure of the upper block of the offshore substation and the seabed big data center module, the integrated jacket and the self-installed pile leg are all built on land or in a dock, and the debugging and the installation of the blocks and the equipment in the pressure-resistant cabin are completed before the shipment from sea;
the method comprises the following steps:
firstly, an integral jacket is shipped to a designated sea area, and after lifting, sinking, piling and leveling, an upper block of an offshore transformer substation and a submarine big data center module integrated structure are shipped; the integrated structure empties ballast water in the pressure-resistant cabin in the wet towing process, provides maximum buoyancy, and adds a pontoon to realize the floating state of the integral structure if the integral weight is large; in the state, lifting connecting pile legs are lifted to the highest, the upper assembly block of the offshore transformer substation is lowered to the vicinity of the sea level, the gravity center is lowered, the stability during wet towing is improved, and a tugboat is adopted to wet-tow the integrated structure to the vicinity of a jacket;
lowering the lifting type connecting pile leg to the seabed, lifting the bottom surface of the upper block of the offshore transformer substation to be slightly higher than the supporting point plane of the jacket, and then enabling the lifting type connecting pile leg to shrink upwards to avoid collision when the structure enters the notch of the jacket; after the tug wets and drags the integrated structure to the position without the submarine cable notch, ballast water in the pressure-resistant cabin is added, meanwhile, lifting type connecting pile legs and submarine big data center modules are lowered to the seabed, positioning structures on two sides of a fixed frame of the submarine big data center modules are inserted into positioning structures in a jacket connecting frame, and accurate positioning of the integrated structure is achieved;
then slowly lowering the upper block of the offshore substation to the jacket supporting surface to realize load transfer of the upper block of the offshore substation; finally, laying and connecting pipelines, including connecting the power generation side submarine cable to the upper block of the offshore substation, communicating various pipelines between the upper block of the offshore substation and the pressure-resistant cabin, and connecting the outgoing submarine cable and the optical cable with the upper block of the offshore substation and the pressure-resistant cabin;
in the whole installation process, the connecting channel is self-adjusted according to the relative positions of the upper block of the offshore substation and the seabed big data center module.
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US20200355590A1 (en) * 2018-10-24 2020-11-12 Ocean University Of China System for measuring mechanical properties of sea floor sediments at full ocean depths
CN212243724U (en) * 2020-03-04 2020-12-29 中国电建集团华东勘测设计研究院有限公司 Floating-supporting type mounting structure of offshore converter station

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102936888A (en) * 2012-11-09 2013-02-20 中国水电顾问集团华东勘测设计研究院 Self-installation type offshore booster station structure and installation method thereof
CN109056684A (en) * 2018-09-21 2018-12-21 中国电建集团华东勘测设计研究院有限公司 The split type jacket structure of Large marine platform and its installation method of the installation of support method are floated suitable for shallow sea water
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